CN110864222A - Centralized liquid supply system in automobile assembly workshop - Google Patents

Abstract

The invention proposes a centralized fluid supply system in an automobile assembly workshop, which includes a controller, a brake fluid subsystem, a cooling fluid subsystem and a refrigerant subsystem. The brake fluid control output end of the controller is connected to the brake fluid subsystem control input end. , the coolant control output end of the controller is connected to the control input end of the coolant subsystem, and the refrigerant control output end of the controller is connected to the control input end of the coolant subsystem. It can transport a variety of liquids such as brake fluid, coolant and refrigerant at the same time, and the transportation pipelines of each liquid will not affect each other, and they are transported separately. The system is stable and the work efficiency is high.

Description

Centralized liquid supply system in automobile assembly workshop

technical field

The invention relates to the technical field of material conveying, in particular to a centralized liquid supply system in an automobile assembly workshop.

Background technique

The centralized liquid supply system can provide long-distance transportation according to the user's needs, and transport the liquid from the liquid storage tank to the user-designated place at a certain pressure and flow rate. Car refill points and more. The delivery medium includes fuel (gasoline, diesel), brake fluid, refrigerant, engine oil, transmission oil, gear oil, power steering fluid and other different liquids. Therefore, a centralized system that can stably transport various liquids is urgently needed Liquid supply system.

SUMMARY OF THE INVENTION

The present invention aims to at least solve the technical problems existing in the prior art, and particularly innovatively proposes a centralized liquid supply system in an automobile assembly workshop, which can stably transport a variety of different liquids.

In order to achieve the above object of the present invention, the present invention provides a centralized fluid supply system in an automobile assembly workshop, including a controller, a brake fluid subsystem, a cooling fluid subsystem and a refrigerant subsystem, wherein the controller brake fluid controls the output The end is connected to the control input end of the brake fluid subsystem, the cooling fluid control output end of the controller is connected to the control input end of the cooling fluid subsystem, and the refrigerant control output end of the controller is connected to the control input end of the refrigerant subsystem.

In the above solution: the brake fluid subsystem includes a first brake fluid storage tank, the first brake fluid storage tank is provided with a first brake fluid suction pump, and the first brake fluid suction pump is provided in the first brake fluid storage tank. The pump is connected to the brake fluid suction hose, the other end of the brake fluid suction hose is connected to the material inlet of the first brake fluid electromagnetic angle seat valve, and the signal input end of the first brake fluid electromagnetic angle seat valve is connected to the first system of the controller. The signal output end of the dynamic fluid storage valve; the material outlet of the first brake fluid electromagnetic angle seat valve is connected to the material inlet of the first brake fluid infusion pump, and the material outlet of the first brake fluid infusion pump is connected to the brake fluid through the brake fluid infusion pipe The material inlet of the liquid supply end valve, the brake fluid infusion pipe is provided with a brake fluid pressure detector, and the signal output end of the brake fluid pressure detector is connected to the brake fluid pressure signal input end of the controller. The material outlet of the liquid supply terminal valve is connected to the brake fluid filling machine;

The first brake fluid infusion pump is a pneumatic diaphragm pump, the driving gas input end of the first brake fluid infusion pump is connected to one end of the first brake fluid gas delivery branch, and the other end of the first brake fluid gas delivery branch is connected to the brake fluid The end of the gas delivery main pipe and the beginning end of the brake fluid gas delivery main pipe are connected to the compressed air pipe; the brake fluid gas delivery main pipe is sequentially provided with a brake fluid pneumatic triple piece, a brake fluid pump solenoid valve and a brake fluid air defense along the airflow direction. Hit the protector.

In the above solution: the brake fluid subsystem is further equipped with a second brake fluid storage tank, and the second brake fluid storage tank is provided with a second brake fluid suction pump, and the second brake fluid The suction pump is also connected to the second brake fluid electromagnetic angle seat valve through the brake fluid suction hose, and the second brake fluid electromagnetic angle seat valve is connected to the beginning of the brake fluid supply pipe; the second brake fluid electromagnetic angle seat valve The signal input end is connected to the signal output end of the second brake fluid storage valve of the controller; the brake fluid supply pipe is provided with a brake fluid flow detector, and the signal output end of the brake fluid flow detector is connected to the brake fluid of the controller. a fluid flow signal input end; wherein, the first brake fluid storage tank and the second brake fluid storage tank are installed for one use and one for standby;

The brake fluid subsystem further includes a sound and light alarm for changing the brake fluid barrel, and the signal input end of the sound and light alarm for changing the brake fluid barrel is connected to the output end of the brake fluid alarm signal of the controller.

In the above solution: drying cylinders are provided on the vents of the first brake fluid storage tank and the second brake fluid storage tank.

In the above solution: the cooling liquid subsystem includes a cooling liquid discharge unit and a cooling liquid station area conveying unit;

The cooling liquid unloading unit includes a cooling liquid liquid conveying sub-unit and a cooling liquid gas recovery sub-unit;

The cooling liquid conveying subunit includes a cooling liquid unloading joint, and is connected to the cooling liquid tanker through the material inlet of the cooling liquid unloading joint, and the material outlet of the cooling liquid unloading joint is connected to the material inlet of the first cooling liquid electromagnetic angle seat valve, The signal input end of the first coolant electromagnetic angle seat valve is connected to the output end of the coolant discharge signal of the controller; the material outlet of the first coolant electromagnetic angle seat valve is connected to the material inlet of the first coolant discharge pump through the conveying main pipe of the coolant station area. The cooling liquid discharge flow detector is installed on the conveying main pipe of the cooling liquid station area. The signal output end of the cooling liquid discharge flow detector is connected to the cooling liquid discharge signal input end of the controller. The material outlet of the first cooling liquid discharge pump passes through The conveying branch pipes of the two cooling liquid station areas are connected to two stainless steel cooling liquid storage tanks. The two cooling liquid stainless steel storage tanks are equipped with cooling liquid level gauges, and the signal output end of the cooling liquid level gauges is connected to the controller coolant liquid. bit signal input terminal;

The first cooling liquid unloading pump is a pneumatic diaphragm pump. The input end of the driving gas of the first cooling liquid unloading pump is connected to one end of the first cooling liquid unloading gas pipeline, and the other end of the first cooling liquid unloading gas pipeline is connected to the cooling liquid unloading pipe. The end of the liquid and gas delivery main pipe and the beginning of the coolant unloading and gas delivery main pipe are connected to the compressed air pipe; the cooling liquid unloading and gas delivery main pipe is sequentially provided with a cooling liquid unloading pneumatic triplet and a coolant unloading pump solenoid valve along the airflow direction and coolant unloading runaway protector; the signal input end of the solenoid valve of the coolant unloading pump is connected to the drive signal output end of the pump in the coolant station area of the controller.

In the above solution: the cooling liquid gas recovery sub-unit includes a cooling liquid gas recovery pipe connected with the tops of the two cooling liquid stainless steel storage tanks, and the other end of the cooling liquid gas recovery pipe is connected to the material inlet of the second cooling liquid electromagnetic angle seat valve, and the second cooling liquid electromagnetic angle seat valve material inlet. The signal input end of the second coolant electromagnetic angle seat valve is connected to the coolant recovery signal output end of the controller; the material outlet of the second coolant electromagnetic angle seat valve is connected to the coolant gas recovery joint, and is connected to the coolant tanker through the coolant gas recovery joint Coolant gas inlet.

The cooling liquid gas recovery sub-unit is used to recover the volatilized and gaseous cooling liquid into the cooling liquid tanker for recycling, reducing the loss of cooling liquid, and also preventing the gas formed by the cooling liquid from leaking into the air and avoiding environmental pollution.

In the above scheme: the conveying unit in the cooling liquid station area includes a cooling liquid infusion pipe whose beginning end is connected with the infusion ports at the bottom of the two cooling liquid stainless steel storage tanks, and the end of the cooling liquid infusion pipe is connected with the material inlet of the first cooling liquid infusion pump, The material outlet of the first cooling liquid infusion pump is connected to the material inlet of the third cooling liquid electromagnetic angle seat valve through the conveying pipe of the cooling liquid station area, and the material outlet of the third cooling liquid electromagnetic angle seat valve is connected to the cooling liquid filling machine, and the third cooling liquid The signal input end of the electromagnetic angle seat valve is connected to the output end of the controller coolant filling signal; the coolant station area conveying pressure detector is installed on the conveying pipe of the coolant station area, and the signal output end of the coolant station area conveying pressure detector is connected to the controller The input end of the conveying pressure signal in the cooling liquid station area monitors the pipe pressure conveyed in the cooling liquid station area in real time through the conveying pressure detector in the cooling liquid station area;

The first cooling liquid infusion pump is a pneumatic diaphragm pump, and the driving gas input end of the first cooling liquid infusion pump is connected to one end of the gas transmission branch pipe in the first cooling liquid station area, and the other end of the gas transmission branch pipe in the first cooling liquid station area is connected to the cooling liquid station area. The end of the gas main pipe is connected to the compressed air pipe at the beginning of the gas main pipe in the cooling liquid station area; the air main pipe in the cooling liquid station area is provided with a cooling liquid pneumatic triple piece, a cooling liquid infusion pump solenoid valve and a cooling liquid anti-aircraft pump in sequence along the airflow direction. Protector; the signal input end of the solenoid valve of the coolant infusion pump is connected to the drive signal output end of the pump in the coolant station area of the controller.

In the above solution: the cooling liquid subsystem further includes a cooling liquid backup conveying unit, the cooling liquid backup conveying unit includes a first cooling liquid backup liquid storage tank, and a first cooling liquid backup liquid storage tank is provided in the first cooling liquid backup liquid storage tank. Coolant suction pump, the first coolant suction pump is connected to the coolant suction hose, the other end of the coolant suction hose is connected to the material inlet of the fourth coolant electromagnetic angle seat valve, and the fourth coolant electromagnetic angle seat valve signal The input end is connected to the signal output end of the first cooling liquid backup liquid storage valve of the controller, the material outlet of the fourth cooling liquid electromagnetic angle seat valve is connected to the beginning of the cooling liquid backup liquid storage main pipe through the first cooling liquid backup liquid storage branch pipe, and the cooling liquid backup liquid storage pipe The end of the main pipe is connected to the material inlet of the first cooling liquid backup infusion pump, and the material outlet of the first cooling liquid backup infusion pump is connected to the material inlet of the third cooling liquid electromagnetic angle seat valve;

The first cooling liquid backup infusion pump is a pneumatic diaphragm pump, the driving gas input end of the first cooling liquid backup infusion pump is connected to one end of the first cooling liquid backup gas delivery branch, and the other end of the first cooling liquid backup gas delivery branch is connected to the cooling liquid backup The end of the gas transmission main pipe and the beginning end of the cooling liquid backup gas transmission main pipe are connected to the compressed air pipe; the cooling liquid backup gas transmission main pipe is sequentially provided with the cooling liquid backup pneumatic triplet, the cooling liquid backup liquid infusion pump solenoid valve and the cooling liquid backup along the airflow direction. Runaway protector; the signal input end of the solenoid valve of the coolant backup infusion pump is connected to the drive signal output end of the coolant backup pump of the controller.

In the above scheme: the refrigerant subsystem includes a first refrigerant cylinder, a first cylinder scale is arranged at the bottom of the first refrigerant cylinder, the signal output end of the first cylinder scale is connected to the first cylinder weight signal input terminal of the controller, and the first refrigerant cylinder is connected to the first cylinder. One end of the refrigerant liquid supply branch pipe, the first refrigerant liquid supply branch pipe is provided with a first refrigerant electromagnetic angle seat valve, the signal input end of the first refrigerant electromagnetic angle seat valve is connected to the first refrigerant valve signal output end of the controller; the first refrigerant liquid supply branch pipe The other end is connected to one end of the refrigerant liquid supply main pipe, the other end of the refrigerant liquid supply main pipe is connected to the material inlet of the first plunger pump, and the material outlet of the first plunger pump is connected to the material inlet of the third refrigerant electromagnetic angle seat valve through the refrigerant conveying main pipe. There is a second refrigerant pressure sensor, the signal output end of the second refrigerant pressure sensor is connected to the pressure sensing signal input end of the refrigerant end of the controller, the third refrigerant electromagnetic angle seat valve is connected to the inlet of the refrigerant filling machine; the other end of the refrigerant supply main pipe is connected to the refrigerant The material inlet of the overpressure discharge valve and the material outlet of the refrigerant overpressure discharge valve are connected to the material inlet of the refrigerant conveying main pipe;

The first plunger pump is a pneumatic plunger pump, the driving gas input end of the first plunger pump is connected to one end of the first refrigerant gas delivery branch pipe, the other end of the first refrigerant gas delivery branch pipe is connected to the end of the refrigerant gas delivery main pipe, and the refrigerant gas delivery main pipe The beginning end is connected with a compressed air pipe; the refrigerant gas transmission main pipe is sequentially provided with a refrigerant pneumatic triple piece, a refrigerant solenoid valve and a refrigerant anti-aircraft protector along the air flow direction.

In the above scheme: the refrigerant subsystem includes a second refrigerant cylinder, the bottom of the second refrigerant cylinder is provided with a second cylinder scale, the signal output end of the second cylinder scale is connected to the weight signal input terminal of the second cylinder of the controller, and the second refrigerant cylinder is connected to the second cylinder. One end of the refrigerant liquid supply branch pipe, the second refrigerant liquid supply branch pipe is provided with a second refrigerant electromagnetic angle seat valve, the signal input end of the second refrigerant electromagnetic angle seat valve is connected to the signal output end of the second refrigerant cylinder valve of the controller; the second refrigerant liquid supply port The other end of the branch pipe is also connected to one end of the refrigerant liquid supply main pipe;

The refrigerant subsystem further includes an acousto-optic alarm for changing the refrigerant barrel, and the signal input end of the acousto-optic alarm for changing the refrigerant barrel is connected to the output end of the refrigerant alarm signal of the controller.

To sum up, due to the adoption of the above technical solutions, the beneficial effects of the present invention are that various liquids such as brake fluid, coolant and refrigerant can be transported at the same time, and the transport pipelines of the liquids will not affect each other, and are transported separately. The system is stable and the work efficiency is high.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

Fig. 1 is a system diagram of the present invention;

Fig. 2 is the structural representation of the brake fluid subsystem of the present invention;

Fig. 3 is the structural representation of the refrigerant subsystem of the present invention;

4 is a schematic structural diagram of the cooling liquid subsystem of the present invention;

FIG. 5 is a schematic structural diagram of the windshield cleaning fluid subsystem of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

As shown in Figures 1-5, the centralized fluid supply system in the automobile assembly workshop includes a controller, a brake fluid subsystem, a coolant subsystem and a refrigerant subsystem. The brake fluid control output end of the controller is connected to the brake fluid The subsystem control input end, the controller cooling liquid control output end is connected to the cooling liquid subsystem control input end, and the controller refrigerant control output end is connected to the refrigerant subsystem control input end.

The brake fluid subsystem includes a first brake fluid storage tank 101a, and the first brake fluid storage tank 101a is provided with a first brake fluid suction pump 102a. The first brake fluid suction pump 102a is connected to the brake fluid suction hose, the other end of the brake fluid suction hose is connected to the material inlet of the first brake fluid electromagnetic angle seat valve 104a, and the signal input end of the first brake fluid electromagnetic angle seat valve 104a is connected to the first brake fluid electromagnetic angle seat valve 104a. A brake fluid reservoir valve signal output end. The material outlet of the first brake fluid electromagnetic angle seat valve 104a is connected to the material inlet of the first brake fluid infusion pump 106a, and the material outlet of the first brake fluid infusion pump 106a is connected to the material of the brake fluid supply end valve 108 through the brake fluid infusion pipe Inlet, the brake fluid infusion pipe is provided with a brake fluid pressure detector 107, the signal output end of the brake fluid pressure detector 107 is connected to the brake fluid pressure signal input end of the controller, and the brake fluid supply fluid The material outlet of the end valve 108 is connected to the brake fluid filling machine.

Preferably, the first brake fluid infusion pump 106a is a pneumatic diaphragm pump, and the driving gas input end of the first brake fluid infusion pump 106a is connected to one end of the first brake fluid air branch pipe, and the first brake fluid air branch pipe The other end is connected to the end of the brake fluid gas main pipe, and the beginning end of the brake fluid gas main pipe is connected to the compressed air pipe. A brake fluid pneumatic triplet 111 , a brake fluid pump solenoid valve 110 and a brake fluid runaway protector 109 are sequentially arranged on the brake fluid gas supply main pipe along the airflow direction.

When the brake fluid needs to be delivered, the controller sends a start delivery command to the brake fluid subsystem, and the controller sends a communication command to the first brake fluid electromagnetic angle seat valve 104a to connect the first brake fluid storage tank 101a with the brake fluid. The dynamic fluid infusion tube is connected. The controller sends a communication command to the brake fluid pump solenoid valve 110, so that the brake fluid gas supply main pipe is communicated with the compressed air pipe, so that the compression control in the compressed air pipe is transmitted to the first brake fluid infusion pump through the brake fluid gas supply main pipe 106a, and enter from the driving air input end of the first brake fluid infusion pump 106a, open the first brake fluid infusion pump 106a by the air pressure of the compressed air, and provide pressure for the brake fluid through the first brake fluid infusion pump 106a , pump the brake fluid in the first brake fluid storage tank 101a to the brake fluid filling port.

Preferably, the brake fluid subsystem is further equipped with a second brake fluid storage tank 101b, and the second brake fluid storage tank 101b is provided with a second brake fluid suction pump 102b. The brake fluid suction pump 102b is also connected to the second brake fluid electromagnetic angle seat valve 104b through the brake fluid suction hose, and the second brake fluid electromagnetic angle seat valve 104b is connected to the beginning of the brake fluid supply pipe. The signal input end of the second brake fluid electromagnetic angle seat valve 104b is connected to the signal output end of the second brake fluid reservoir valve of the controller. The brake fluid supply pipe is provided with a brake fluid flow detector 105, and the signal output end of the brake fluid flow detector 105 is connected to the brake fluid flow signal input end of the controller. Wherein, the first brake fluid storage tank 101a and the second brake fluid storage tank 101b are installed for one use and one for backup.

Preferably, the brake fluid subsystem further comprises a sound and light alarm for changing the brake fluid barrel, and the signal input end of the sound and light alarm for changing the brake fluid barrel is connected to the output end of the brake fluid warning signal of the controller.

When the detection signal of the brake fluid flow detector 105 is less than the set value, the controller immediately closes the first brake fluid electromagnetic angle seat valve 104a, opens the second brake fluid electromagnetic angle seat valve 104b, and sends out the brake fluid The sound and light alarm for changing the barrel sends an alarm command, and the sound and light alarm for changing the brake fluid is issued through the sound and light alarm for changing the brake fluid; when the brake fluid flow detector 105 detects the interruption of the pipeline fluid again, it will immediately Close the second brake fluid electromagnetic angle seat valve 104b, open the first brake fluid electromagnetic angle seat valve 104a, and issue an alarm command to the sound and light alarm for changing the brake fluid barrel, through the sound and light alarm for changing the brake fluid barrel Send out a sound and light alarm signal for changing the brake fluid; this cycle.

Preferably, drying cylinders 103 are provided on the vents of the first brake fluid storage tank 101a and the second brake fluid storage tank 101b.

Preferably, the first brake fluid infusion pump 106a is also connected in parallel with a second brake fluid infusion pump 106b, and the first brake fluid infusion pump 106a and the second brake fluid infusion pump 106b are installed for one use and one for backup , preferably, the material inlet, material outlet and driving gas input end of the first brake fluid infusion pump 106a are all provided with manual valves, and the material inlet, material outlet and driving gas of the second brake fluid infusion pump 106b The air input end is also provided with a manual valve. When the first brake fluid infusion pump 106a fails, the material inlet, material outlet and driving gas input end of the first brake fluid infusion pump 106a are cut off through the manual valve, and the The material inlet, the material outlet and the driving gas input end of the second brake fluid infusion pump 106b are used to switch between the first brake fluid infusion pump 106a and the second brake fluid infusion pump 106b.

The second brake fluid infusion pump 106b is a pneumatic diaphragm pump, and the driving gas input end of the second brake fluid infusion pump 106b is connected to one end of the second brake fluid air branch pipe, and the other end of the second brake fluid air branch pipe Connect to the end of the brake fluid gas main.

The cooling liquid subsystem includes a cooling liquid discharging unit and a cooling liquid station area conveying unit. The coolant unloading unit is used to transfer the coolant in the coolant tanker to two stainless steel storage tanks 305 for coolant. The cooling liquid station area conveying unit is used to convey the cooling liquid in the two cooling liquid stainless steel storage tanks 305 to the cooling liquid filling machine.

The cooling liquid unloading unit includes a cooling liquid liquid conveying sub-unit and a cooling liquid gas recovery sub-unit. The cooling liquid delivery sub-unit is used to transfer the cooling liquid in the cooling liquid tanker to the two cooling liquid stainless steel storage tanks 305 . The cooling liquid gas recovery sub-unit is used to transport the cooling liquid gas in the two cooling liquid stainless steel storage tanks 305 to the cooling liquid tank truck.

The cooling liquid conveying sub-unit includes a cooling liquid unloading joint 301, and is connected to the cooling liquid tanker through the material inlet of the cooling liquid unloading joint 301, and the material outlet of the cooling liquid unloading joint 301 is connected to the first cooling liquid electromagnetic angle seat valve 302 Material inlet, the signal input end of the first coolant electromagnetic angle seat valve 302 is connected to the coolant discharge signal output end of the controller. The material outlet of the first cooling liquid electromagnetic angle seat valve 302 is connected to the material inlet of the first cooling liquid unloading pump 304a through the conveying main pipe of the cooling liquid station area. The signal output end of the unloading flow detector 303 is connected to the input end of the cooling liquid unloading signal of the controller, and the material outlet of the first cooling liquid unloading pump 304a is connected to the two cooling liquid stainless steel storage tanks 305 through the two conveying branch pipes of the cooling liquid station area. , the two coolant stainless steel storage tanks 305 are provided with coolant level gauges. The signal output end of the coolant level gauge is connected to the input end of the controller coolant level signal. When the coolant level gauge detects that the coolant in the coolant stainless steel tank 305 is less than the set value, the controller drives the first cooling The liquid electromagnetic angle seat valve 302 is connected, and the controller sends a start liquid discharge command to the cooling liquid unloading unit to transfer the cooling liquid in the refrigerant tanker to the two cooling liquid stainless steel storage tanks 305. At the same time, the controller sends the cooling liquid to the cooling liquid station area. The conveying unit sends an instruction to stop conveying. When the coolant level gauge detects that the coolant in the coolant stainless steel tank 305 is less than the set value, the controller drives the first coolant electromagnetic angle seat valve 302 to block, and the controller sends a stop message to the coolant unloading unit. The unloading instruction stops the transfer of the coolant in the refrigerant tanker to the two stainless steel storage tanks 305 for coolant, and at the same time, the controller sends a start conveying instruction to the conveying unit in the coolant station area. Preferably, the end of the branch pipe in the cooling liquid station area extends into the bottom of the stainless steel storage tank 305 for the cooling liquid.

Preferably, the first cooling liquid unloading pump 304a is a pneumatic diaphragm pump, and the driving gas input end of the first cooling liquid unloading pump 304a is connected to one end of the first cooling liquid unloading gas supply branch pipe, and the first cooling liquid unloading liquid gas supply branch pipe is connected. The other end is connected to the end of the cooling liquid unloading and gas delivery main pipe, and the beginning end of the cooling liquid unloading and gas delivery main pipe is connected to the compressed air pipe. The cooling liquid unloading and gas delivery main pipe is sequentially provided with a cooling liquid unloading pneumatic triplet 306, a cooling liquid unloading pump solenoid valve 307 and a cooling liquid unloading runaway protector 308 along the air flow direction. The signal input end of the solenoid valve of the coolant discharge pump 307 is connected to the drive signal output end of the pump in the coolant station area of the controller.

When it is necessary to unload the coolant, the controller sends a stop delivery instruction to the delivery unit of the coolant station area, and at the same time, the controller sends a start unloading instruction to the delivery unit of the coolant station area, and the controller sends the coolant unloading pump solenoid valve 307 Send a communication command to connect the cooling liquid unloading and gas delivery main pipe with the compressed air pipe, so that the compression control in the compressed air pipe is transported to the first cooling liquid unloading pump 304a through the cooling liquid unloading gas delivery main pipe, and from the first cooling liquid unloading pump 304a. The driving air input end of the liquid unloading pump 304a enters, and the first cooling liquid unloading pump 304a is opened by the air pressure of the compressed air, and the first cooling liquid unloading pump 304a provides pressure for the cooling liquid, and pumps the cooling liquid to the two cooling liquids. liquid stainless steel storage tank 305.

Preferably, the first cooling liquid unloading pump 304a is connected in parallel with a second cooling liquid unloading pump 304b, preferably, the second cooling liquid unloading pump 304b is also a pneumatic diaphragm pump, and the second cooling liquid unloading pump The driving gas input end of 304b is connected to one end of the second cooling liquid unloading gas delivery branch pipe, and the other end of the second cooling liquid unloading liquid gas delivery branch pipe is connected to the end of the cooling liquid unloading liquid gas delivery main pipe.

And the first cooling liquid unloading pump 304a and the second cooling liquid unloading pump 304b are installed for one use and one for standby. The material inlet, material outlet and driving gas input end of the first cooling liquid unloading pump 304a are all provided with manual valves. , the material inlet, material outlet and driving gas input end of the second cooling liquid unloading pump 304b are also provided with manual valves. When the first cooling liquid unloading pump 304a fails, the first cooling liquid unloading pump is cut off through the manual valve. The material inlet, material outlet and driving gas input end of the liquid pump 304a are connected to the material inlet, material outlet and driving gas input end of the second cooling liquid unloading pump 304b, so as to realize the first cooling liquid unloading pump 304a and switching of the second coolant discharge pump 304b.

The cooling liquid gas recovery sub-unit includes a cooling liquid gas recovery pipe connected to the top of the two cooling liquid stainless steel storage tanks 305, and the other end of the cooling liquid gas recovery pipe is connected to the material inlet of the second cooling liquid electromagnetic angle seat 316 valve, and the second cooling liquid gas recovery pipe The liquid electromagnetic angle seat 316 valve signal input end is connected to the coolant recovery signal output end of the controller. The material outlet of the second cooling liquid electromagnetic angle seat 316 is connected to the cooling liquid gas recovery joint 315 , and is connected to the cooling liquid gas inlet of the cooling liquid tanker through the cooling liquid gas recovery joint 315 . The cooling liquid gas recovery sub-unit is used to recover the volatilized and gaseous cooling liquid into the cooling liquid tanker for recycling, reducing the loss of cooling liquid, and also preventing the gas formed by the cooling liquid from leaking into the air and avoiding environmental pollution.

The cooling liquid station area conveying unit includes a cooling liquid infusion pipe whose beginning end is connected with the liquid infusion ports at the bottom of the two cooling liquid stainless steel storage tanks 305, and the end of the cooling liquid infusion pipe is connected with the material inlet of the first cooling liquid infusion pump 309a. The material outlet of the first cooling liquid infusion pump 309a is connected to the material inlet of the third cooling liquid electromagnetic angle seat valve 311 through the conveying pipe of the cooling liquid station area, and the material outlet of the third cooling liquid electromagnetic angle seat valve 311 is connected to the cooling liquid filling machine. The signal input end of the liquid electromagnetic angle seat valve 311 is connected to the output end of the coolant filling signal of the controller. The coolant station area conveying pipe is provided with a coolant station area conveying pressure detector 310, and the signal output end of the coolant station area conveying pressure detector 310 is connected to the controller's coolant station area conveying pressure signal input end, and is conveyed through the coolant station area. The pressure detector 310 monitors the pipe pressure delivered in the coolant station area in real time.

Preferably, the first cooling liquid infusion pump 309a is a pneumatic diaphragm pump, and the driving gas input end of the first cooling liquid infusion pump 309a is connected to one end of the gas transmission branch pipe in the first cooling liquid station area, and the other end of the gas transmission branch pipe in the first cooling liquid station area. It is connected to the end of the gas transmission main pipe in the cooling liquid station area, and the compressed air pipe is connected to the beginning end of the gas transmission main pipe in the cooling liquid station area. The cooling liquid station area gas main pipe is provided with a cooling liquid pneumatic triplet 312, a cooling liquid infusion pump solenoid valve 313 and a cooling liquid runaway protector 314 in sequence along the air flow direction. The signal input end of the solenoid valve 313 of the coolant infusion pump is connected to the drive signal output end of the pump in the coolant station area of the controller.

When the cooling liquid station area transportation needs to be carried out, the controller sends a stop delivery instruction to the cooling liquid backup delivery unit, the controller sends a start delivery instruction to the cooling liquid station area delivery unit, and the controller sends a connection instruction to the coolant infusion pump solenoid valve 313, Connect the air main pipe of the cooling liquid station area with the compressed air pipe, and let the compression control in the compressed air pipe be transported to the first cooling liquid infusion pump 309a through the air transmission main pipe of the cooling liquid station area, and from the first cooling liquid infusion pump 309a. The input end of the driving gas enters, the first cooling liquid infusion pump 309a is opened by the air pressure of the compressed air, the first cooling liquid infusion pump 309a provides pressure for the cooling liquid, and the cooling liquid in the two cooling liquid stainless steel storage tanks 305 is pumped to the cooling liquid. at the liquid filling port.

Preferably, the first cooling liquid infusion pump 309a is connected in parallel with a second cooling liquid infusion pump 309b, preferably, the second cooling liquid infusion pump 309b is also a pneumatic diaphragm pump, and the second cooling liquid infusion pump 309b drives the gas input The end is connected to one end of the second cooling liquid gas delivery branch pipe, and the other end of the second cooling liquid gas delivery branch pipe is connected to the end of the cooling liquid gas delivery main pipe.

And the first cooling liquid infusion pump 309a and the second cooling liquid infusion pump 309b are installed for one use and one for standby. The material inlet, material outlet and driving gas input end of the first cooling liquid infusion pump 309a are all provided with manual valves. The material inlet, material outlet and driving gas input end of the second cooling liquid infusion pump 309b are also provided with manual valves. When the first cooling liquid infusion pump 309a fails, the material of the first cooling liquid infusion pump 309a is cut off through the manual valve. The inlet, the material outlet and the driving gas input end, and the material inlet, material outlet and driving gas input end connected to the second cooling liquid infusion pump 309b, so as to realize the first cooling liquid infusion pump 309a and the second cooling liquid infusion pump 309b switching.

The cooling liquid subsystem further includes a cooling liquid backup conveying unit, and the cooling liquid backup conveying unit is used for continuously conveying cooling liquid to the cooling liquid filling machine when the cooling liquid station area conveying unit fails to work.

The cooling liquid backup conveying unit includes a first cooling liquid backup liquid storage tank 401a, and a first cooling liquid suction pump 402a is arranged in the first cooling liquid backup liquid storage tank 401a, and the first cooling liquid suction pump 402a communicates with each other. The coolant suction hose, the other end of the coolant suction hose is connected to the material inlet of the fourth coolant electromagnetic angle seat valve 403a, and the signal input end of the fourth coolant electromagnetic angle seat valve 403a is connected to the first coolant backup liquid storage of the controller The valve signal output end, the material outlet of the fourth cooling liquid electromagnetic angle seat valve 403a is connected to the beginning end of the cooling liquid backup liquid storage main pipe through the first cooling liquid backup liquid storage branch pipe, and the end of the cooling liquid backup liquid storage main pipe is connected to the first cooling liquid backup liquid infusion pump 405a The material inlet and the material outlet of the first cooling liquid backup infusion pump 405a are connected to the material inlet of the third cooling liquid electromagnetic angle seat valve 311 .

Preferably, the first cooling liquid backup infusion pump 405a is a pneumatic diaphragm pump, and the driving gas input end of the first cooling liquid backup infusion pump 405a is connected to one end of the first cooling liquid backup gas delivery branch pipe, and the first cooling liquid backup gas delivery branch pipe. The other end is connected to the end of the standby cooling liquid gas transmission main pipe, and the beginning end of the cooling liquid standby gas transmission main pipe is connected to the compressed air pipe. The cooling liquid backup gas delivery main pipe is sequentially provided with a cooling liquid backup pneumatic triplet 409, a cooling liquid backup infusion pump solenoid valve 408 and a cooling liquid backup runaway protector 407 along the airflow direction. The signal input end of the solenoid valve 408 of the cooling liquid backup infusion pump is connected to the driving signal output end of the cooling liquid backup pump of the controller.

When the backup coolant delivery is required, the controller sends a stop delivery command to the coolant station area delivery unit, the controller sends a start delivery command to the coolant backup delivery unit, and the controller sends a connection command to the fourth coolant electromagnetic angle seat valve 403a , the first cooling liquid backup liquid storage tank 401a is communicated with the cooling liquid backup liquid storage main pipe. The controller sends a communication instruction to the solenoid valve 408 of the coolant backup infusion pump, so that the coolant backup gas delivery main pipe is communicated with the compressed air pipe, so that the compression control in the compressed air pipe is transported to the first cooling liquid backup infusion liquid through the cooling liquid backup gas delivery main pipe At the pump 405a, and entering from the driving gas input end of the first cooling liquid backup infusion pump 405a, the first cooling liquid backup infusion pump 405a is turned on by the air pressure of the compressed air, and the first cooling liquid backup infusion pump 405a provides pressure for the cooling liquid , pump the cooling liquid in the first cooling liquid backup liquid storage tank 401a to the cooling liquid filling port.

Preferably, the first cooling liquid backup infusion pump 405a is connected in parallel with a second cooling liquid backup infusion pump 405b, preferably, the second cooling liquid backup infusion pump 405b is also a pneumatic diaphragm pump, and the second cooling liquid backup infusion pump. The driving gas input end of 405b is connected to one end of the second cooling liquid backup gas delivery branch pipe, and the other end of the second cooling liquid backup gas delivery branch pipe is connected to the end of the cooling liquid backup gas delivery main pipe.

And the first cooling liquid backup infusion pump 405a and the second cooling liquid backup infusion pump 405b are installed for one use and one for backup. The material inlet, material outlet and driving gas input end of the first cooling liquid backup infusion pump 405a are all provided with manual valves. The material inlet, material outlet and driving gas input end of the second cooling liquid backup infusion pump 405b are also provided with manual valves. When the first cooling liquid backup infusion pump 405a fails, the first cooling liquid backup is cut off through the manual valve. The material inlet, material outlet and driving gas input end of the infusion pump 405a, and the material inlet, material outlet and driving gas input end of the second cooling liquid backup infusion pump 405b are connected, so as to realize the first cooling liquid backup infusion pump 405a and the switching of the second coolant backup infusion pump 405b.

Preferably, the cooling liquid backup conveying unit is also equipped with a second cooling liquid backup liquid storage tank 401b, and the second cooling liquid backup liquid storage tank 401b is provided with a second cooling liquid suction pump 402b. The liquid suction pump 402b is also connected to the fifth cooling liquid electromagnetic angle seat valve 403b through the cooling liquid suction hose, and the fifth cooling liquid electromagnetic angle seat valve 403b is connected to the second cooling liquid backup liquid storage branch pipe and is connected to the starting end of the cooling liquid backup liquid storage main pipe. . The cooling liquid backup liquid storage main pipe is provided with a cooling liquid backup conveying flow detector 404, and the signal output end of the cooling liquid flow detector 404 is connected to the cooling liquid backup flow signal input end of the controller. Wherein, the first cooling liquid backup liquid storage tank 401a and the second cooling liquid backup liquid storage tank 401b are installed for one use and one for backup.

Preferably, the cooling liquid backup conveying unit further comprises a sound and light alarm for cooling liquid backup conveying and changing barrels, and the signal input end of the cooling liquid backup conveying barrel changing sound and light alarm is connected to the output end of the controller cooling liquid backup conveying alarm signal.

When the detection signal of the coolant backup flow detector 404 is less than the set value, the controller immediately closes the fourth coolant solenoid angle seat valve 403a, opens the fifth coolant solenoid angle seat valve 403b, and sends the coolant backup delivery change The acousto-optic alarm of the barrel sends out an alarm command, and the acousto-optic alarm for the replacement of the cooling liquid is sent out through the acousto-optic alarm for the backup of the coolant conveyance; when the backup coolant flow detector 404 detects the interruption of the pipeline fluid again, the controller Immediately close the fifth coolant electromagnetic angle seat valve 403b, open the fourth coolant electromagnetic angle seat valve 403a, and send an alarm command to the audible and visual alarm that sends out the backup delivery of the coolant, and the audible and visual alarm for the backup of the coolant is delivered. The cooler sends out an audible and visual alarm signal for changing the coolant tank; it circulates like this.

The refrigerant subsystem includes a first refrigerant cylinder 201a, the bottom of the first refrigerant cylinder 201a is provided with a first cylinder scale 211a, the signal output terminal of the first cylinder scale 211a is connected to the first cylinder weight signal input terminal of the controller, and the first refrigerant cylinder 201a is connected to the first cylinder weight signal input terminal. One end of a refrigerant supply branch pipe, the first refrigerant supply branch pipe is provided with a first refrigerant electromagnetic angle seat valve 202a, and the signal input end of the first refrigerant electromagnetic angle seat valve 202a is connected to the first refrigerant valve signal output end of the controller. The other end of the first refrigerant liquid supply branch pipe is connected to one end of the refrigerant liquid supply main pipe, the other end of the refrigerant liquid supply main pipe is connected to the material inlet of the first plunger pump 205a, and the material outlet of the first plunger pump 205a is connected to the third refrigerant electromagnetic angle seat through the refrigerant conveying main pipe The material inlet of valve 207 is provided with a second refrigerant pressure sensor 206 on the main refrigerant conveying pipe. The signal output end of the second refrigerant pressure sensor 206 is connected to the pressure sensing signal input end of the refrigerant end of the controller, and the third refrigerant electromagnetic angle seat valve 207 is connected to the refrigerant pressure sensor. Injection machine entrance. The other end of the refrigerant supply main pipe is connected to the material inlet of the refrigerant overpressure discharge valve 204, and the material outlet of the refrigerant overpressure discharge valve 204 is connected to the material inlet end of the refrigerant conveying main pipe.

Preferably, the first plunger pump 205a is a pneumatic plunger pump, the driving gas input end of the first plunger pump 205a is connected to one end of the first refrigerant gas delivery branch pipe, and the other end of the first refrigerant gas delivery branch pipe is connected to the refrigerant gas delivery main pipe At the end, the beginning of the refrigerant gas main pipe is connected to the compressed air pipe. The refrigerant gas transmission main pipe is provided with a refrigerant pneumatic triplet 210, a refrigerant solenoid valve 209 and a refrigerant runaway protector 208 in sequence along the air flow direction.

When refrigerant delivery is required, the controller sends a start delivery instruction to the refrigerant subsystem, and the controller sends a communication instruction to the first refrigerant electromagnetic angle seat valve 202a to connect the first refrigerant cylinder 201a with the refrigerant supply main pipe. The controller sends a communication command to the refrigerant solenoid valve 209, so that the main gas transmission pipe in the cooling liquid station area is connected with the compressed air pipe, so that the compression control in the compressed air pipe is transported to the first plunger pump 205a through the gas transmission main pipe in the cooling liquid station area, And enter from the driving gas input end of the first plunger pump 205a, the first plunger pump 205a is opened by the air pressure of the compressed air, the first plunger pump 205a provides pressure for the cooling liquid, and the refrigerant in the first refrigerant cylinder 201a is discharged. Pump to the refrigerant filling port.

The refrigerant subsystem includes a second refrigerant cylinder 201b, the bottom of the second refrigerant cylinder 201b is provided with a second cylinder scale 211b, the signal output end of the second cylinder scale 211b is connected to the second cylinder weight signal input terminal of the controller, and the second refrigerant cylinder 201b is connected to the first cylinder. One end of the second refrigerant supply branch pipe is provided with a second refrigerant electromagnetic angle seat valve 202b. The signal input end of the second refrigerant electromagnetic angle seat valve 202b is connected to the second refrigerant cylinder 201b valve signal output end of the controller. The other end of the second refrigerant liquid supply branch pipe is also connected to one end of the refrigerant liquid supply main pipe. In addition, the first refrigerant cylinder 201a and the second refrigerant cylinder 201b are provided for one use and one for standby.

Preferably, the refrigerant subsystem further includes an acousto-optic alarm for changing the refrigerant barrel, and the signal input end of the acousto-optic alarm for changing the refrigerant barrel is connected to the output end of the refrigerant alarm signal of the controller.

When the detection signal of the first cylinder scale 211a is less than the set value, the controller immediately closes the first refrigerant electromagnetic angle seat valve, opens the second refrigerant electromagnetic angle seat valve, and sends an alarm command to the sound and light alarm for changing the refrigerant barrel, The acousto-optic alarm signal for changing the refrigerant barrel is issued through the sound and light alarm for changing the refrigerant barrel; when the detection signal of the first cylinder scale 211b is less than the set value, the controller immediately closes the second refrigerant electromagnetic angle seat valve and opens the first refrigerant electromagnetic angle Seat valve, and send an alarm command to the sound and light alarm for changing the refrigerant barrel, and send out the sound and light alarm signal for changing the refrigerant barrel through the sound and light alarm for changing the refrigerant barrel; and so on.

Preferably, a first refrigerant pressure sensor 203 is provided on the refrigerant liquid supply main pipe, and the signal output end of the first refrigerant pressure sensor 203 is connected to the refrigerant initial end pressure signal input end of the controller. When the first refrigerant pressure sensor 203 detects the low pressure and does not recover within a set time, such as 3 minutes, the controller sends an alarm command to the sound and light alarm for changing the refrigerant barrel, and the sound and light alarm for changing the refrigerant barrel passes the sound and light alarm. Send out a sound and light alarm signal for changing the refrigerant barrel to remind you to change the tank. The first refrigerant pressure sensor 203, the first cylinder scale 201a, and the second cylinder scale 201b are backup solutions for each other, providing double insurance.

Preferably, the first plunger pump 205a is also connected in parallel with a second plunger pump 205b, and the signal input end of the second plunger pump 205b is connected to the signal output end of the second refrigerant pump of the controller, wherein the second plunger The pump 205b is a pneumatic plunger pump, the driving gas input end of the second plunger pump 205b is connected to one end of the second refrigerant gas delivery branch pipe, and the other end of the second refrigerant gas delivery branch pipe is connected to the end of the refrigerant gas delivery main pipe. And the first plunger pump 205a and the second plunger pump 205b are installed for one use and one for standby. The material inlet, material outlet and driving gas input end of the first plunger pump 205a are all provided with manual valves. The material inlet, material outlet and driving gas input end of the second plunger pump 205b are also provided with manual valves. When the first plunger pump 205a fails, the material inlet and material outlet of the first plunger pump 205a are cut off through the manual valve. and the driving gas input end, and connect the material inlet, material outlet and driving gas input end of the second plunger pump 205b, so as to realize the switching between the first plunger pump 205a and the second plunger pump 205b.

Preferably, the centralized fluid supply system in the automobile assembly workshop further includes a windshield washer fluid subsystem. The windshield cleaning liquid subsystem includes a methanol unloading unit, a mixing unit, a mixed liquid station area conveying unit and a mixed liquid backup conveying unit, the methanol unloading output end of the controller is connected to the methanol unloading unit input end, the control The mixing output end of the controller is connected to the input end of the mixing unit, the conveying output end of the controller station area is connected to the input end of the conveying unit of the mixing solution station area, and the backup conveying output end of the controller is connected to the input end of the mixing solution backup conveying unit.

The methanol unloading unit includes a methanol liquid conveying subunit and a methanol gas recovery subunit. The methanol liquid station area conveying unit includes a methanol unloading joint 501, and is connected to the material outlet of the methanol tanker through the material inlet of the methanol unloading joint 501, and the material outlet of the methanol unloading joint 501 is connected to the material inlet of the first methanol electromagnetic angle seat valve 502. , the signal input end of the first methanol electromagnetic angle seat valve 502 is connected to the methanol discharge signal output end of the controller. The material outlet of the first methanol electromagnetic angle seat valve 502 is connected to the material inlet of the first methanol unloading pump 504a through the methanol delivery main pipe. The methanol delivery main pipe is provided with a methanol flow detector 503, and the signal output end of the methanol flow detector 503 is connected to the methanol unloading controller of the controller. The material outlet of the first methanol unloading pump 504a is connected to two methanol stainless steel storage tanks 505 through two methanol delivery branch pipes, and the two methanol stainless steel storage tanks 505 are both provided with unloading ultrasonic liquid level gauges. and discharge leak detector. When the unloading ultrasonic level gauge detects that the methanol in the methanol stainless steel storage tank 505 is less than the set value, the controller drives the first methanol electromagnetic angle seat valve 502 to open, and at the same time, the controller sends a message to the methanol unloading unit to start unloading order to transfer the methanol in the methanol tanker to the methanol stainless steel storage tank 505. When the unloading ultrasonic level gauge detects that the methanol in the methanol stainless steel tank 505 is greater than the set value, the controller drives the first methanol electromagnetic angle seat valve 502 to close, and at the same time, the controller sends a message to the methanol unloading unit to stop unloading order to stop transferring the methanol in the methanol tanker to the methanol stainless steel storage tank 505. When the unloading leak detector detects that the unloading liquid in the methanol stainless steel tank 505 leaks, the controller drives the first methanol electromagnetic angle seat valve 502 to close, and at the same time, the controller sends a stop unloading instruction to the methanol unloading unit.

Preferably, the end of the methanol delivery branch pipe extends into the bottom of the methanol stainless steel storage tank 505 to avoid splashing liquid and accelerate the volatilization of methanol liquid. Preferably, the material outlets of the two methanol stainless steel storage tanks 505 are connected with a nitrogen protection system, and the nitrogen protection system includes a nitrogen cylinder 511, the gas outlet of the nitrogen cylinder 511 is connected to one end of a nitrogen pipe, and the other end of the nitrogen pipe is connected to the two. The material outlets of each of the methanol stainless steel storage tanks 505 are connected, and a manual valve is provided on the nitrogen pipe.

Preferably, the first methanol unloading pump 504a is a pneumatic diaphragm pump, the driving gas input end of the first methanol unloading pump 504a is connected to one end of the first methanol gas delivery branch pipe, and the other end of the first methanol gas delivery branch pipe is connected to the end of the methanol gas delivery main pipe. , the beginning of the methanol gas main pipe is connected to the compressed air pipe. The methanol gas supply main pipe is provided with a methanol pneumatic triplet 508, a methanol discharge pump solenoid valve 509 and a methanol runaway protector 510 in sequence along the air flow direction. The signal input end of the solenoid valve 509 of the methanol unloading pump is connected to the output end of the drive signal of the pump in the methanol station area of the controller. Preferably, the first methanol unloading pump 504a is connected in parallel with a second methanol unloading pump, and the first methanol unloading pump 504a and the second methanol unloading pump are installed for one use and one for standby, and the first methanol unloading pump is installed. The material inlet, material outlet and driving gas input end of the pump 504a are all provided with manual valves, and the material inlet, material outlet and driving gas input end of the second methanol unloading pump 504b are also provided with manual valves. When the unloading pump 504a fails, the material inlet, material outlet and driving gas input end of the first methanol unloading pump 504a are cut off through the manual valve, and the material inlet, material outlet and drive of the second methanol unloading pump 504b are connected The gas input end is used to realize the switching between the first methanol unloading pump 504a and the second methanol unloading pump 504b.

Preferably, the second methanol unloading pump 504b is also a pneumatic diaphragm pump, the driving gas input end of the second methanol unloading pump 504b is connected to one end of the second methanol gas delivery branch pipe, and the other end of the second methanol gas delivery branch pipe is connected to the methanol gas delivery main pipe. end.

The methanol gas recovery sub-unit includes a methanol gas recovery pipe connected to the top of the two methanol stainless steel storage tanks, and the other end of the methanol gas recovery pipe is connected to the material inlet of the second methanol electromagnetic angle seat valve 506, and the second methanol electromagnetic angle seat valve 506 signal The input end is connected to the output end of the methanol recovery signal of the controller. The material outlet of the second methanol electromagnetic angle seat valve 506 is connected to the methanol gas recovery joint 507 , and is connected to the methanol tanker gas inlet through the methanol gas recovery joint 507 . The methanol gas recovery sub-unit is used to recover the volatilized gaseous methanol into the methanol tanker for recovery, reducing the loss of methanol, and also preventing the gas formed by methanol from leaking into the air and avoiding environmental pollution.

The liquid mixing unit includes a high liquid level tank 602 and a mixing tank 603, the high liquid level tank 602 is located above the mixing tank 603, and the high liquid level tank 602 includes two holding tanks, respectively a methanol holding tank 602a and a water holding tank 602b, the methanol containing tank 602a and the water containing tank 602b of the high liquid level tank 602 are both communicated with the mixing tank 603 through a transfer pipe, the transfer pipe is provided with a transfer solenoid valve, and the signal input end of the transfer solenoid valve is connected The mixing signal output end of the controller, the mixing box 603 is equipped with a stirrer 603a.

The methanol containing tank 602a is provided with a methanol ultrasonic level meter 611 and a methanol magnetostrictive level sensor 612. The detection signal output end of the methanol ultrasonic level meter 611 is connected to the first methanol level signal input end of the controller. The level sensor 612 is connected to the second methanol liquid level signal input end of the controller.

The water holding tank 602b is provided with a water ultrasonic level meter 613 and a water magnetostrictive level sensor 614. The detection signal output end of the water ultrasonic level meter 613 is connected to the first water level signal input end of the controller. The level sensor 614 is connected to the second liquid level signal input end of the controller. At the same time, the methanol ultrasonic liquid level meter 611 and the methanol magnetostrictive liquid level sensor 612 are set to prevent methanol from overflowing into the high-level liquid tank due to a malfunction, which not only ensures the accuracy but also ensures the reliability.

The bottom of the methanol holding box 602a is connected to the material outlet of the mixed methanol pump 601, and the material inlet of the mixed methanol pump 601 is connected to the two methanol stainless steel storage tanks 505 through two mixed branch pipes, and both of the mixed branch pipes extend to methanol Bottom of stainless steel tank 505. The water holding tank 602b is connected to the material outlet of the mixing water pump 606, and the material inlet of the mixing water pump 606 is connected to the water tank. Water level signal input terminal.

Preferably, the mixed methanol pump 601 is a pneumatic diaphragm pump, and the driving gas input end of the mixed methanol pump 601 is connected to one end of the mixed methanol gas delivery branch pipe, and the other end of the mixed methanol gas delivery branch pipe is connected to the end of the mixed gas delivery main pipe, and the mixed gas delivery main pipe end. Connect the compressed air line. The mixed methanol gas delivery branch pipe is sequentially provided with a mixed methanol infusion pump solenoid valve 608 and a mixed methanol runaway protector 607 along the air flow direction. The signal input end of the solenoid valve 608 of the mixed methanol infusion pump is connected to the drive signal output end of the mixed methanol pump 601 of the controller. The mixed gas transmission main pipe is provided with a mixed pneumatic triple piece 609 . When either the methanol ultrasonic liquid level meter 611 or the methanol magnetostrictive liquid level sensor 612 detects that the methanol in the methanol holding tank 602a is greater than the set value, the controller sends a disconnection instruction to the mixed methanol infusion pump solenoid valve 608 to disconnect the The driving gas of the methanol pump 601 is mixed to stop the mixed methanol pump 601 and continue to deliver methanol.

Preferably, the mixed water pump 606 is a pneumatic diaphragm pump, and the driving gas input end of the mixed water pump 606 is connected to one end of the mixed water and air branch pipe, and the other end of the mixed water and air branch pipe is connected to the end of the mixed gas transmission main pipe. The mixed water infusion pump solenoid valve 610 and the mixed water runaway protector 615 are sequentially arranged on the mixed water gas delivery branch pipe along the airflow direction. The signal input end of the solenoid valve 610 of the mixed water infusion pump is connected to the drive signal output end of the mixed water pump 606 of the controller. When any one of the ultrasonic water level meter 613 or the water magnetostrictive liquid level sensor 614 detects that the water in the water holding tank 602b is greater than the set value, the controller sends a disconnection command to the solenoid valve 610 of the mixed water infusion pump to disconnect the The driving gas of the mixing water pump 606 stops the mixing water pump 606 and continues to deliver water.

The bottom of the mixing box 603 is provided with a methanol mixed liquid outlet, the methanol mixed liquid outlet is connected to the material inlet of the third methanol electromagnetic angle seat valve 604a, and the material outlet of the third methanol electromagnetic angle seat valve 604a is connected to the mixed liquid through the mixed liquid self-flow pipe. The material inlet of the liquid storage tank 604, the signal input end of the third methanol electromagnetic angle seat valve 604a is connected to the signal output end of the controller mixed liquid end transfer valve. And the mixed liquid self-flow pipe extends into the bottom of the mixed liquid storage tank 604, and the mixed liquid storage tank 604 is also equipped with a mixed liquid ultrasonic liquid level gauge and a mixed liquid leakage detector. The signal output end of the mixed liquid ultrasonic liquid level gauge is connected to the first mixed liquid liquid level signal input end of the controller, and the mixed liquid leakage detector signal output end is connected to the mixed liquid leakage detection signal input end of the controller. When the mixed liquid ultrasonic level meter detects that the mixed liquid in the mixed liquid storage tank 604 is less than the set value, the controller drives the third methanol electromagnetic angle seat valve 604a to open, and transfers the mixed liquid in the mixed liquid tank 603 to the mixed liquid In the storage tank 604, at the same time, the controller sends an instruction to stop the conveying to the conveying unit of the mixed liquid station area. When the mixed liquid ultrasonic level gauge detects that the mixed liquid in the mixed liquid storage tank 604 exceeds the set value, the controller drives the third methanol electromagnetic angle seat valve 604a to close, and stops transferring the mixed liquid in the mixed liquid tank 603 to the mixed liquid In the liquid storage tank 604, at the same time, the controller sends an instruction to start conveying to the conveying unit in the mixed liquid station area. When the mixed liquid leakage detector detects that the mixed liquid in the mixed liquid storage tank 604 leaks, the controller drives the third methanol electromagnetic angle seat valve 604a to close, and at the same time, the controller sends a stop delivery instruction to the mixed liquid station area conveying unit .

The mixed liquid standby conveying unit includes a first mixed liquid station area conveying pump 701a. The material inlet of the first mixed liquid station area transfer pump 701a is connected to the material outlet of the mixed liquid storage tank 604 through the mixed liquid station area transfer pipe, and the mixed liquid station area transfer pipe extends into the bottom of the mixed liquid storage tank 604. The first mixed liquid station area The material outlet of the regional delivery pump 701a is connected to one end of the mixed liquid remote liquid supply pipe. The mixed liquid remote liquid supply pipe is provided with a methanol concentration online detector 703 and a mixed liquid pressure detector 704 in sequence along the liquid supply direction. One end is connected to the material inlet of the fourth methanol mixed liquid electromagnetic angle seat valve 708, and the material outlet of the fourth methanol mixed liquid electromagnetic angle seat valve 708 is connected to the methanol mixed liquid filling machine. The signal input end of the fourth methanol mixed solution electromagnetic angle seat valve 708 is connected to the mixed solution delivery on-off end of the controller.

The material outlet of the mixed liquid storage tank 604 is connected to the material inlet of the methanol gas overpressure discharge valve 702 through the methanol gas delivery pipe, and the material outlet of the methanol gas overpressure discharge valve 702 is connected to the mixed liquid remote liquid supply pipe.

Preferably, the delivery pump 701a in the first mixed liquid station area is a pneumatic diaphragm pump, and the driving gas input end of the first mixed liquid station area delivery pump 701a is connected to one end of the first mixed liquid gas delivery branch pipe, and the first mixed liquid gas delivery branch pipe. The other end is connected to the end of the mixed liquid gas transmission main pipe, and the beginning end of the mixed liquid gas transmission main pipe is connected to the compressed air pipe. The mixed liquid gas transmission main pipe is provided with a mixed liquid pneumatic triplet 707, a mixed liquid infusion pump solenoid valve 706 and a mixed liquid runaway protector 705 in sequence along the air flow direction. The signal input end of the mixed solution infusion pump solenoid valve 706 is connected to the drive signal output end of the mixed solution pump of the controller.

Preferably, the first mixed liquid station area transfer pump 701a is connected in parallel with the second mixed liquid station area transfer pump 701b, and the first mixed liquid station area transfer pump 701a and the second mixed liquid station area transfer pump 701b use one ready for installation, the material inlet, material outlet and driving gas input end of the first mixed liquid station area transfer pump 701a are all provided with manual valves, and the second mixed liquid station area transfer pump 701b has a material inlet, material outlet and drive The gas input ends are also provided with manual valves. When the first mixed liquid station area transfer pump 701a fails, the material inlet, material outlet and driving gas input end of the first mixed liquid station area transfer pump 701a are cut off through the manual valve, and The material inlet, material outlet and driving gas input end of the second mixed liquid station area transfer pump 701b are connected to realize the switching between the first mixed liquid station area transfer pump 701a and the second mixed liquid station area transfer pump 701b.

Preferably, the delivery pump 701b in the second mixed liquid station area is also a pneumatic diaphragm pump, and the driving gas input end of the second mixed liquid station area delivery pump 701b is connected to one end of the second mixed liquid gas delivery branch pipe, and the second mixed liquid gas delivery branch pipe is another. One end is connected to the end of the mixed liquid gas delivery main pipe.

The mixed liquid backup delivery unit includes a first mixed liquid storage tank 801a, and a first mixed liquid suction pump 802a is arranged in the first mixed liquid storage tank 801a, and the first mixed liquid suction pump 802a communicates with the mixed liquid The liquid suction hose, the other end of the mixed liquid suction hose is connected to the material inlet of the fifth mixed liquid electromagnetic angle seat valve 803a, and the signal input end of the fifth mixed liquid electromagnetic angle seat valve 803a is connected to the first mixed liquid backup liquid storage valve signal of the controller At the output end, the material outlet of the fifth mixed liquid electromagnetic angle seat valve 803a is connected to the material inlet of the first mixed liquid backup infusion pump 804a, and the material outlet of the first mixed liquid backup infusion pump 804a is connected to the material inlet of the fourth methanol mixed liquid electromagnetic angle seat valve 708.

Preferably, the first mixed liquid standby infusion pump 804a is a pneumatic diaphragm pump, and the first mixed liquid standby infusion pump 804a drives the gas input end to connect one end of the first mixed liquid standby gas transmission branch pipe, and the first mixed liquid standby gas transmission branch pipe. The other end is connected to the end of the mixed liquid standby gas transmission main pipe, and the beginning end of the mixed liquid standby gas transmission main pipe is connected to the compressed air pipe. The mixed liquid standby gas transmission main pipe is provided with a mixed liquid standby pneumatic triplet 808, a mixed liquid standby infusion pump solenoid valve 807 and a mixed liquid standby anti-aircraft protector 806 in sequence along the airflow direction. The signal input end of the electromagnetic valve 807 of the mixed solution backup infusion pump is connected to the drive signal output end of the mixed solution backup pump of the controller.

Preferably, the first mixed liquid standby infusion pump 804a is connected in parallel with the second mixed liquid standby infusion pump 804b, and the first mixed liquid standby infusion pump 804a and the second mixed liquid standby infusion pump 804b are installed for one use and one for standby. The material inlet, material outlet and driving gas input end of the first mixed liquid standby infusion pump 804a are all provided with manual valves, and the material inlet, material outlet and driving gas input end of the second mixed liquid standby infusion pump 804b are also provided. There is a manual valve, when the first mixed liquid standby infusion pump 804a fails, the material inlet, material outlet and driving gas input end of the first mixed liquid standby infusion pump 804a are cut off through the manual valve, and the second mixed liquid standby infusion is connected. The material inlet, material outlet and driving gas input end of the pump 804b are used to switch between the first mixed liquid backup infusion pump 804a and the second mixed liquid backup infusion pump 804b.

Preferably, the second mixed liquid standby infusion pump 804b is also a pneumatic diaphragm pump, and the driving gas input end of the second mixed liquid standby infusion pump 804b is connected to one end of the second mixed liquid standby gas transmission branch pipe, and the second mixed liquid standby gas transmission branch pipe is another. One end is connected to the end of the standby gas delivery main pipe of the mixed liquid.

Preferably, the mixed liquid backup conveying unit is also equipped with a second mixed liquid storage tank 801b, and the second mixed liquid storage tank 801b is provided with a second mixed liquid suction pump 802a, and the second mixed liquid suction pump 802a is provided. The liquid pump 802a is also connected to the sixth mixed liquid electromagnetic angle seat valve 803b through the mixed liquid suction hose, and the sixth mixed liquid electromagnetic angle seat valve 803b is connected to the beginning of the mixed liquid supply pipe. The signal input end of the sixth mixed solution electromagnetic angle seat valve 803b is connected to the signal output end of the second mixed solution backup liquid storage valve of the controller. The mixed liquid supply pipe is provided with a mixed liquid flow detector 809, and the signal output end of the mixed liquid flow detector 809 is connected to the mixed liquid flow signal input end of the controller. Wherein, the first mixed liquid storage tank 801a and the second mixed liquid storage tank 801b are installed for one use and one for standby.

Preferably, the mixed solution backup conveying unit further comprises an acousto-optic alarm for the mixed solution backup conveyance and barrel change.

When the detection signal of the mixed liquid flow detector 809 is less than the set value, the controller immediately closes the fifth mixed liquid electromagnetic angle seat valve 803a, opens the sixth mixed liquid electromagnetic angle seat valve 803b, and sends out the mixed liquid backup delivery and replacement bucket The audible and visual alarm sends out an alarm command, and the audible and visual alarm for the mixed solution is sent out through the acousto-optical alarm for changing the tank for the mixed solution; when the mixed solution flow detector 809 detects the interruption of the pipeline fluid again, the controller will immediately shut down The sixth mixed liquid electromagnetic angle seat valve 803b opens the fifth mixed liquid electromagnetic angle seat valve 803a, and sends out an alarm command to the sound and light alarm for the mixed liquid backup conveying and changing barrels, and sends out the sound and light alarm for the mixed liquid standby conveying and changing barrels. Sound and light alarm signal when the mixed solution is changed; this cycle.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a liquid supply system is concentrated in car assembly workshop which characterized in that: the brake fluid control system comprises a controller, a brake fluid subsystem, a cooling fluid subsystem and a refrigerant subsystem, wherein the brake fluid control output end of the controller is connected with the control input end of the brake fluid subsystem, the cooling fluid control output end of the controller is connected with the control input end of the cooling fluid subsystem, and the refrigerant control output end of the controller is connected with the control input end of the refrigerant subsystem.

2. The centralized liquid supply system of the automobile assembly plant as recited in claim 1, wherein: the brake fluid subsystem comprises a first brake fluid storage tank (101a), a first brake fluid suction pump (102a) is arranged in the first brake fluid storage tank (101a), the first brake fluid suction pump (102a) is communicated with a brake fluid suction hose, the other end of the brake fluid suction hose is communicated with a material inlet of a first brake fluid electromagnetic angle seat valve (104a), and the signal input end of the first brake fluid electromagnetic angle seat valve (104a) is connected with the signal output end of a first brake fluid storage valve of the controller; a material outlet of the first brake fluid electromagnetic angle seat valve (104a) is communicated with a material inlet of a first brake fluid infusion pump (106a), a material outlet of the first brake fluid infusion pump (106a) is communicated with a material inlet of a brake fluid supply end valve (108) through a brake fluid infusion tube, a brake fluid pressure detector (107) is arranged on the brake fluid infusion tube, a signal output end of the brake fluid pressure detector (107) is connected with a brake fluid pressure signal input end of a controller, and a material outlet of the brake fluid supply end valve (108) is communicated with a brake fluid filling machine;

the first brake fluid infusion pump (106a) is a pneumatic diaphragm pump, the driving gas input end of the first brake fluid infusion pump (106a) is connected with one end of a first brake fluid gas transmission branch pipe, the other end of the first brake fluid gas transmission branch pipe is communicated with the tail end of a brake fluid gas transmission main pipe, and the starting end of the brake fluid gas transmission main pipe is connected with a compressed air pipe; and a brake fluid pneumatic triple piece (111), a brake fluid pump electromagnetic valve (110) and a brake fluid idle-driving prevention protector (109) are sequentially arranged on the brake fluid gas transmission main pipe along the airflow direction.

3. The centralized liquid supply system of the automobile assembly plant as recited in claim 2, wherein: the brake fluid subsystem is also provided with a second brake fluid storage tank (101b), a second brake fluid suction pump (102b) is arranged in the second brake fluid storage tank (101b), the second brake fluid suction pump (102b) is also communicated with a second brake fluid electromagnetic angle seat valve (104b) through a brake fluid suction hose, and the second brake fluid electromagnetic angle seat valve (104b) is communicated with the starting end of a brake fluid supply pipe; the signal input end of a second brake fluid electromagnetic angle seat valve (104b) is connected with the signal output end of a second brake fluid storage valve of the controller; a brake fluid flow detector (105) is arranged on the brake fluid supply pipe, and the signal output end of the brake fluid flow detector (105) is connected with the brake fluid flow signal input end of the controller; wherein the first brake fluid storage tank (101a) and the second brake fluid storage tank (101b) are installed for one use and one standby;

the brake fluid subsystem further comprises a brake fluid barrel changing audible and visual alarm, and the signal input end of the brake fluid barrel changing audible and visual alarm is connected with the brake fluid alarm signal output end of the controller.

4. The method of claim 3, wherein: and drying cylinders (103) are arranged on the air vents of the first brake fluid storage tank (101a) and the second brake fluid storage tank (101 b).

5. The centralized liquid supply system of the automobile assembly plant as recited in claim 1, wherein: the cooling liquid subsystem comprises a cooling liquid unloading unit and a cooling liquid station area conveying unit;

the cooling liquid unloading unit comprises a cooling liquid conveying subunit and a cooling liquid gas recovery subunit;

the cooling liquid conveying subunit comprises a cooling liquid unloading connector (301), a material inlet of the cooling liquid unloading connector (301) is communicated with a cooling liquid tank car, a material outlet of the cooling liquid unloading connector (301) is communicated with a material inlet of a first cooling liquid electromagnetic angle seat valve (302), and a signal input end of the first cooling liquid electromagnetic angle seat valve (302) is connected with a cooling liquid unloading signal output end of the controller; a material outlet of a first cooling liquid electromagnetic angle seat valve (302) is communicated with a material inlet of a first cooling liquid unloading pump (304a) through a cooling liquid station area conveying main pipe, a cooling liquid unloading flow detector (303) is arranged on the cooling liquid station area conveying main pipe, a signal output end of the cooling liquid unloading flow detector (303) is connected with a cooling liquid unloading signal input end of a controller, the material outlet of the first cooling liquid unloading pump (304a) is communicated with two cooling liquid stainless steel storage tanks (305) through two cooling liquid station area conveying branch pipes, cooling liquid level meters are arranged in the two cooling liquid stainless steel storage tanks (305), and signal output ends of the cooling liquid level meters are connected with a cooling liquid level signal input end of the controller;

the first cooling liquid unloading pump (304a) is a pneumatic diaphragm pump, the driving air input end of the first cooling liquid unloading pump (304a) is connected with one end of a first cooling liquid unloading air conveying branch pipe, the other end of the first cooling liquid unloading air conveying branch pipe is communicated with the tail end of a cooling liquid unloading air conveying main pipe, and the starting end of the cooling liquid unloading air conveying main pipe is connected with a compressed air pipe; a cooling liquid discharging pneumatic triple piece (306), a cooling liquid discharging pump electromagnetic valve (307) and a cooling liquid discharging idle-run-proof protector (308) are sequentially arranged on the cooling liquid discharging gas transmission main pipe along the airflow direction; and the signal input end of an electromagnetic valve of the cooling liquid unloading pump (307) is connected with the driving signal output end of a cooling liquid station pump of the controller.

6. The centralized liquid supply system of the automobile assembly plant as recited in claim 5, wherein: the cooling liquid and gas recovery sub-unit comprises cooling liquid and gas recovery pipes communicated with the tops of the two cooling liquid stainless steel storage tanks (305), the other ends of the cooling liquid and gas recovery pipes are communicated with a material inlet of a second cooling liquid electromagnetic angle seat (316), and a valve signal input end of the second cooling liquid electromagnetic angle seat (316) is connected with a cooling liquid recovery signal output end of the controller; and a material outlet of the second cooling liquid electromagnetic angle seat (316) valve is connected with a cooling liquid gas recovery joint (315) and is communicated with a cooling liquid gas inlet of the cooling liquid tank truck through the cooling liquid gas recovery joint (315).

7. The centralized liquid supply system of the automobile assembly plant as recited in claim 5, wherein: the cooling liquid station area conveying unit comprises a cooling liquid conveying pipe, the initial end of the cooling liquid conveying pipe is communicated with two liquid conveying ports at the bottom of the cooling liquid stainless steel storage tank (305), the tail end of the cooling liquid conveying pipe is communicated with a material inlet of a first cooling liquid conveying pump (309a), a material outlet of the first cooling liquid conveying pump (309a) is communicated with a material inlet of a third cooling liquid electromagnetic angle seat valve (311) through the cooling liquid station area conveying pipe, a material outlet of the third cooling liquid electromagnetic angle seat valve (311) is communicated with a cooling liquid filling machine, and a signal input end of the third cooling liquid electromagnetic angle seat valve (311) is connected with a cooling liquid filling signal output end of a controller; a cooling liquid station area conveying pressure detector (310) is arranged on the cooling liquid station area conveying pipe, the signal output end of the cooling liquid station area conveying pressure detector (310) is connected with the cooling liquid station area conveying pressure signal input end of the controller, and pipe pressure conveyed by the cooling liquid station area is monitored in real time through the cooling liquid station area conveying pressure detector (310);

the first cooling liquid infusion pump (309a) is a pneumatic diaphragm pump, the driving gas input end of the first cooling liquid infusion pump (309a) is connected with one end of a gas transmission branch pipe of the first cooling liquid station area, the other end of the gas transmission branch pipe of the first cooling liquid station area is communicated with the tail end of a gas transmission main pipe of the cooling liquid station area, and the starting end of the gas transmission main pipe of the cooling liquid station area is connected with a compressed air pipe; a cooling liquid pneumatic triple piece (312), a cooling liquid infusion pump electromagnetic valve (313) and a cooling liquid idle driving prevention protector (314) are sequentially arranged on the cooling liquid station area gas transmission main pipe along the airflow direction; and the signal input end of a cooling liquid infusion pump electromagnetic valve (313) is connected with the driving signal output end of a cooling liquid station pump of the controller.

8. The centralized liquid supply system of the automobile assembly plant as recited in claim 5, wherein: the cooling liquid subsystem further comprises a cooling liquid standby conveying unit, the cooling liquid standby conveying unit comprises a first cooling liquid standby liquid storage tank (401a), a first cooling liquid suction pump (402a) is arranged in the first cooling liquid standby liquid storage tank (401a), the first cooling liquid suction pump (402a) is communicated with a cooling liquid suction hose, the other end of the cooling liquid suction hose is communicated with a material inlet of a fourth cooling liquid electromagnetic angle seat valve (403a), a signal input end of the fourth cooling liquid electromagnetic angle seat valve (403a) is connected with a signal output end of a first cooling liquid standby liquid storage valve of the controller, a material outlet of the fourth cooling liquid electromagnetic angle seat valve (403a) is communicated with a starting end of the cooling liquid standby liquid storage main pipe through a first cooling liquid standby liquid storage branch pipe, the tail end of the cooling liquid standby liquid storage main pipe is communicated with a material inlet of the first cooling liquid standby liquid infusion pump (405a), and a material outlet of the first cooling liquid standby infusion pump (405a) is communicated with a material inlet of the third cooling liquid electromagnetic angle seat valve (;

the first cooling liquid standby infusion pump (405a) is a pneumatic diaphragm pump, the driving air input end of the first cooling liquid standby infusion pump (405a) is connected with one end of the first cooling liquid standby air delivery branch pipe, the other end of the first cooling liquid standby air delivery branch pipe is communicated with the tail end of the cooling liquid standby air delivery main pipe, and the starting end of the cooling liquid standby air delivery main pipe is connected with a compressed air pipe; a cooling liquid standby pneumatic triple piece (409), a cooling liquid standby infusion pump electromagnetic valve (408) and a cooling liquid standby idle driving prevention protector (407) are sequentially arranged on the cooling liquid standby gas transmission main pipe along the airflow direction; the signal input end of the electromagnetic valve (408) of the cooling liquid standby infusion pump is connected with the driving signal output end of the cooling liquid standby infusion pump of the controller.

9. The centralized liquid supply system of the automobile assembly plant as recited in claim 1, wherein: the refrigerant subsystem comprises a first refrigerant steel bottle (201a), a first steel bottle scale (211a) is arranged at the bottom of the first refrigerant steel bottle (201a), the signal output end of the first steel bottle scale (211a) is connected with the weight signal input end of a first steel bottle of the controller, the first refrigerant steel bottle (201a) is communicated with one end of a first refrigerant liquid supply branch pipe, a first refrigerant electromagnetic angle seat valve (202a) is arranged on the first refrigerant liquid supply branch pipe, and the signal input end of the first refrigerant electromagnetic angle seat valve (202a) is connected with the signal output end of a first refrigerant valve of the controller; the other end of the first refrigerant liquid supply branch pipe is connected with one end of a refrigerant liquid supply main pipe, the other end of the refrigerant liquid supply main pipe is communicated with a material inlet of a first plunger pump (205a), a material outlet of the first plunger pump (205a) is communicated with a material inlet of a third refrigerant electromagnetic angle seat valve (207) through a refrigerant conveying main pipe, a second refrigerant pressure sensor (206) is arranged on the refrigerant conveying main pipe, a signal output end of the second refrigerant pressure sensor (206) is connected with a pressure sensing signal input end at the refrigerant tail end of a controller, and the third refrigerant electromagnetic angle seat valve (207) is communicated with an inlet of a refrigerant filling machine; the other end of the refrigerant liquid supply main pipe is communicated with a material inlet of a refrigerant overpressure drainage valve (204), and a material outlet of the refrigerant overpressure drainage valve (204) is communicated with a material inlet end of the refrigerant conveying main pipe;

the first plunger pump (205a) is a pneumatic plunger pump, the driving gas input end of the first plunger pump (205a) is connected with one end of a first refrigerant gas transmission branch pipe, the other end of the first refrigerant gas transmission branch pipe is communicated with the tail end of a refrigerant gas transmission main pipe, and the starting end of the refrigerant gas transmission main pipe is connected with a compressed air pipe; the refrigerant gas transmission main pipe is sequentially provided with a refrigerant pneumatic triple piece (210), a refrigerant electromagnetic valve (209) and a refrigerant air-blast-proof protector (208) along the airflow direction.

10. The centralized liquid supply system of the automobile assembly plant as recited in claim 9, wherein: the refrigerant subsystem comprises a second refrigerant steel cylinder (201b), a second steel cylinder scale (211b) is arranged at the bottom of the second refrigerant steel cylinder (201b), the signal output end of the second steel cylinder scale (211b) is connected with the weight signal input end of a second steel cylinder of the controller, the second refrigerant steel cylinder (201b) is communicated with one end of a second refrigerant liquid supply branch pipe, a second refrigerant electromagnetic angle seat valve (202b) is arranged on the second refrigerant liquid supply branch pipe, and the signal input end of the second refrigerant electromagnetic angle seat valve (202b) is connected with the valve signal output end of the second refrigerant steel cylinder (201b) of the controller; the other end of the second refrigerant liquid supply branch pipe is also connected with one end of the refrigerant liquid supply main pipe; the first refrigerant steel cylinder (201a) and the second refrigerant steel cylinder (201b) are arranged one by one;

the refrigerant subsystem further comprises a refrigerant barrel-changing audible and visual alarm, and the signal input end of the refrigerant barrel-changing audible and visual alarm is connected with the refrigerant alarm signal output end of the controller.

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