CN216130325U - Automatic drainage device for low-pressure cabin - Google Patents

Abstract

The utility model provides an automatic drainage device of a low-pressure chamber, and relates to the technical field of low-pressure chambers. This low-pressure chamber automatic water discharging device includes: the sensor, the water collecting tank, the control valve and the connecting pipeline are used for automatically draining the low-pressure cabin. The automatic drainage device of the low-pressure chamber is communicated with a sewage discharge channel and the external environment, the water collection tank is arranged for collecting sewage in the chamber body, the sensor is arranged for monitoring the liquid level in the water collection tank, and the flow of fluid in each pipeline is controlled by the control valve. The atmospheric pressure in the water-collecting tank is adjustable, and is unanimous with cabin body internal gas pressure in the water-collecting tank, when for low-pressure, collects the internal sewage in cabin to the water-collecting tank, and is unanimous with external environment at water-collecting tank internal gas pressure, when for normal atmospheric pressure, discharges sewage channel from the water-collecting tank with sewage, solves the internal and external unable exhaust problem of the internal sewage in cabin when having pressure differential outside the cabin, guarantees simultaneously that cabin body during operation internal gas pressure environment is not influenced in the cabin body.

Description

Automatic drainage device for low-pressure cabin

Technical Field

The utility model relates to an automatic drainage device of a low-pressure chamber.

Background

When low-pressure high-humidity tests are carried out on low-pressure cabin equipment at present, a large amount of accumulated water is generated at the bottom in the cabin in a long-time test, and the humidity environment in the cabin and the electricity utilization safety of electrified equipment are influenced due to excessive accumulated water; the environment in the cabin is a low-pressure environment, and accumulated water cannot be discharged out of the cabin in real time due to the pressure difference existing outside the cabin. In the technical field of the existing low-pressure cabin, no device can realize automatic drainage of the low-pressure cabin.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect that the low-pressure chamber in the prior art cannot automatically drain water, and provides an automatic drainage device for the low-pressure chamber.

The utility model solves the technical problems through the following technical scheme:

an automatic drainage device of a low-pressure chamber is characterized by comprising: a sensor, a water collecting tank, a control valve and a connecting pipeline between the sensors and the water collecting tank for automatic drainage of the cabin body, the low-pressure cabin automatic drainage device is communicated with a sewage channel and the external environment, the sensor is arranged in the water collecting tank, the control valve comprises a first control valve group, a second control valve group and a third control valve group, the water collecting tank is provided with a first port, a second port and a third port, the cabin body is provided with a sewage discharge port and a ventilation port, the first control valve block connects the first port and the trapway port, the second control valve block connects the second port and the trapway, the third control valve block connecting the third port, the vent port and the ambient environment, the first port and the second port have a lower horizontal position than the trapway and the second port has a higher horizontal position than the trapway.

In this scheme, the water-collecting tank is used for collecting the internal exhaust sewage of cabin, and the sensor is used for monitoring the liquid level in the water-collecting tank, and first valve unit is used for controlling the break-make of pipeline between the blowdown port of water-collecting tank and cabin, and the second valve unit is arranged in controlling the sewage of water-collecting tank and arranges to sewage pipes, and the third valve unit is arranged in adjusting the atmospheric pressure of water-collecting tank. The system controls the action of the control valve group according to a liquid level signal of the water collection tank fed back by the sensor so as to control the on-off of each pipeline, and then the system is arranged according to the height positions of the upper ports of the water collection tank and the cabin body so that fluid automatically flows under the action of gravity. When the ventilation port of the cabin body is communicated with the water collecting tank, the air pressure in the cabin body and the water collecting tank is consistent, the first control valve group is opened to communicate the passage between the drainage port of the cabin body and the water collecting tank, and the sewage in the cabin body can be automatically drained to the water collecting tank under the action of gravity. When the cabin body is communicated with the external environment, the air pressure in the water collecting tank is consistent with the external environment, the second control valve group is opened to communicate the water collecting tank with the sewage draining channel, and sewage in the water collecting tank can be automatically drained to the sewage draining channel under the action of gravity. When the water collection tank is communicated with the cabin body, a pipeline between the water collection tank and the external environment is cut off through the third control valve group, and a pipeline between the water collection tank and the sewage discharge channel is cut off through the second control valve group, so that the cabin body is not influenced by the external environment when the cabin body discharges sewage to the water collection tank; when the water collecting tank is communicated with the sewage draining channel, the pipeline between the cabin body and the water collecting tank is cut off through the first control valve group and the third control valve group, so that the cabin body is not influenced when the water collecting tank drains the sewage draining channel.

Preferably, the cabin and the water collecting tank are both steel pressure-bearing containers.

In the scheme, a low-pressure environment is required to be maintained in the cabin body to meet the working requirement of the cabin body, the cabin body can be pumped into a negative-pressure environment through a vacuum pump, and the cabin body is made of a steel pressure-bearing container to bear the action of low pressure in the cabin body. The water collecting tank is used for collecting sewage discharged from the cabin body and needs to bear the action of liquid pressure; when the water collecting tank is communicated with the cabin body through a pipeline, the air pressure in the water collecting tank is consistent with that in the cabin body, and at the moment, the water collecting tank is required to bear low air pressure; the water collecting tank is made of steel pressure-bearing container to bear the action of low air pressure and liquid pressure. The cabin body and the water collection tank are made of steel, and the steel has good pressure bearing and deformation resistance and good rust prevention effect.

Preferably, the automatic drainage device of low ballast still includes water drainage tank, water drainage tank structure is the flute profile, water drainage tank sets up under the floor of cabin body bottom, water drainage tank has high low level, water drainage tank's end extremely the blowdown port, water drainage tank material is steel.

In this scheme, through setting up the high low level of drainage tank, make drainage tank have the guide effect, lead to the jar that catchments sewage through blowdown port. The drainage channel is made of steel, and the steel has good deformation resistance and good antirust effect in a high-humidity environment.

Preferably, the sensor is a liquid level sensor.

In this scheme, use level sensor monitoring catchment jar in the liquid level of liquid, level sensor is the sensor commonly used of the interior liquid level of monitoring container.

Preferably, the water collecting tank is provided with a warning water level, the position of the warning water level is within the working range of the liquid level sensor, the horizontal positions of the third port and the sewage draining port are higher than the warning water level, and the horizontal position of the second port is lower than the warning water level.

In the scheme, the system controls the action of each control valve according to the liquid level of the sewage in the water collection tank. When the liquid level in the water collecting tank is lower than the warning water level, the sewage in the cabin body is collected into the water collecting tank; after the liquid level in the water collecting tank reaches the warning water level, the water collecting tank stops collecting sewage in the cabin body, and the sewage in the water collecting tank is discharged to the sewage discharge channel. The position of the sewage discharge port is higher than the warning water level so as to ensure that the water collecting tank can collect sewage to the warning water level and fully utilize the saving function of the water collecting tank; the position of the third port is higher than the warning water level so as to ensure that only gas flows in the pipeline between the ventilation port of the cabin body and the third port of the water collection tank and sewage in the water collection tank cannot be filled; the position of the alarm water level is higher than the second port so as to ensure that the sewage collected in the water collecting tank can be discharged.

Preferably, the first control valve group comprises a first solenoid valve, the second control valve group comprises a second solenoid valve, the third control valve group comprises a third solenoid valve and a fourth solenoid valve, the third solenoid valve connects the third port and the vent port, and the fourth solenoid valve connects the third port and the external environment.

In the scheme, the electromagnetic valves are used for controlling the flow of fluid in each pipeline, the electromagnetic valves are common control valves and can control the on-off or flow regulation of the fluid in the pipelines, the electromagnetic valves are convenient to access a control system, and the electromagnetic valves are convenient to realize the automatic control of the system. The pipelines of the cabin and the water collecting tank are controlled through the third electromagnetic valve, and the pipelines of the external environment and the water collecting tank are controlled through the fourth electromagnetic valve, so that the air pressure in the water collecting tank is adjusted.

Preferably, the first control valve group includes a first cut-off valve, the third control valve group includes a third cut-off valve, a piping path from the first cut-off valve to the soil discharge port is shorter than that of the first solenoid valve, and a piping path from the third cut-off valve to the vent port is shorter than that of the third solenoid valve.

In the scheme, the flow of the fluid in the pipeline is cut off through the stop valve, so that the electromagnetic valve is convenient to repair or maintain. Through the relative position design of solenoid valve and stop valve to guarantee not influencing the stability of cabin body internal environment when carrying out maintenance or change to the solenoid valve, still offer convenience for the operation simultaneously. When the first electromagnetic valve or the third electromagnetic valve is maintained, the first stop valve and the third stop valve cut off the pipelines in which the first stop valve and the third stop valve are respectively arranged so as to ensure the stability of the low-pressure environment in the cabin body, and the first stop valve can also block the sewage in the cabin body from flowing out.

Preferably, the second control valve group comprises a second stop valve, the third control valve group comprises a fourth stop valve, the pipeline path from the second stop valve to the water collection tank is shorter than that of the second electromagnetic valve, and the pipeline path from the fourth stop valve to the water collection tank is shorter than that of the fourth electromagnetic valve.

In the scheme, the flow of the fluid in the pipeline is cut off through the stop valve, so that the electromagnetic valve is convenient to repair or maintain. Through the relative position design of solenoid valve and stop valve to guarantee not influencing the interior sewage of cabin body and arrange to the jar that catchments when carrying out maintenance or change to the solenoid valve, still bring the facility for the operation simultaneously. When the second electromagnetic valve is maintained, the second stop valve cuts off the pipeline where the second electromagnetic valve is located, and the water collecting tank is not influenced to continuously collect sewage in the cabin body; the second stop valve can block the sewage outflow in the catchment jar, and the second solenoid valve leads to sewage pipes, conveniently takes off the second solenoid valve. When maintaining the maintenance to the fourth solenoid valve, fourth stop valve can cut off or communicate place pipeline, does not influence the jar that catchments and continues the internal sewage of collecting compartment, and the fourth solenoid valve communicates external environment, is located the end of place pipeline, conveniently takes off the fourth solenoid valve.

Preferably, the shut-off valve is a mechanical rotary shut-off valve.

In this scheme, the stop valve adopts mechanical rotation type stop valve, and mechanical rotation type stop valve simple structure, fluidic break-make in the accessible manual rotation valve rod controls the pipeline has convenient operation, advantage such as with low costs. Under normal conditions, the stop valve is in normally open state, and the pipeline at its both ends of stop valve intercommunication when needs maintain the maintenance to the solenoid valve, and corresponding stop valve is closed to the manual, cuts the pipeline at corresponding stop valve both ends to maintain the solenoid valve.

Preferably, the first control valve group comprises a check valve, and the check valve is directly connected with the sewage discharge port through the connecting pipeline.

In the scheme, the sewage in the pipeline between the sewage discharge port of the cabin body and the first port of the water collection tank flows in a one-way mode through the check valve, and the backflow of the sewage flowing out of the cabin body is prevented.

The positive progress effects of the utility model are as follows: set up the jar that catchments and be used for collecting the internal sewage in cabin, and the break-make through control valve control pipeline is in order to adjust the atmospheric pressure in the jar that catchments, it is unanimous with cabin body internal gas pressure to catchment the jar internal sewage of cabin, it is unanimous with external environment at jar internal gas pressure that catchments, when normal atmospheric pressure, arrange sewage channel from the jar that catchments with sewage, solve the cabin internal and external unable exhaust problem of sewage when having pressure differential, guarantee simultaneously that cabin body during operation cabin body internal gas pressure environment is not influenced. The liquid level of sewage in the water collecting tank is monitored by adopting a sensor, the flow of fluid between pipelines is controlled by adopting a control valve, and the liquid in the pipelines can automatically flow under the action of gravity by setting the high and low positions of the structure when the pipelines are communicated, so that a foundation is provided for realizing the automatic operation of the system.

Drawings

FIG. 1 is a schematic structural view of an automatic drainage device for a low pressure chamber of the present invention.

FIG. 2 is a schematic view of a communication pipeline of the automatic drainage device for a low-pressure tank when the tank body and the water collection tank of the present invention are communicated.

FIG. 3 is a schematic view of the communication pipeline of the automatic drainage device for low pressure chamber when the water collecting tank is communicated with the sewage draining channel and the external environment.

Description of reference numerals:

the connecting line 5, the trapway 72, the external environment 74, the level sensor 40,

a cabin body 60, a sewage discharge port 61, a ventilation port 63, a drainage channel 1,

a water collection tank 50, a first port 51, a second port 52, a third port 53, a guard water level 55,

a first control valve group 10, a first electromagnetic valve 11, a first stop valve 12 and a one-way valve 13

A second control valve group 20, a second electromagnetic valve 21, a second stop valve 22,

a third control valve group 30, a third electromagnetic valve 31, a third stop valve 32, a fourth electromagnetic valve 41, a fourth stop valve 42

Detailed Description

The utility model is further illustrated by the following examples, which are not intended to limit the scope of the utility model.

As shown in FIG. 1, the present invention provides an automatic drainage device for a low pressure chamber, which comprises a water collection tank 50, a liquid level sensor 40, a control valve and a connecting pipeline 5 therebetween, wherein the automatic drainage device for a low pressure chamber is communicated with the external environment 74 and a sewage drainage channel 72 for automatic drainage of a chamber body 60.

The environment inside the chamber 60 is a negative pressure environment, the external environment 74 has a normal air pressure, and the environment inside the chamber 60 has a pressure difference with the external environment 74.

The cabin 60 is provided with a sewage discharge port 61 and an air vent port 63. The water collecting tank 50 is provided with a first port 51, a second port 52 and a third port 53. The control valves include a first control valve group 10, a second control valve group 20, and a third control valve group 30.

The first control valve group 10 comprises a first solenoid valve 11, a first shut-off valve 12 and a non-return valve 13. The first control valve group 10 is used for controlling the liquid flow of the pipeline between the cabin 60 and the water collecting tank 50, i.e. controlling the sewage in the cabin 60 to stay in the water collecting tank 50. The blowdown port 61 of the cabin 60 and the first port 51 of the water collecting tank 50 are connected through the first control valve group 10, and the blowdown port 61, the check valve 13, the first cut-off valve 12, the first electromagnetic valve 11 and the first port 51 are sequentially connected through the connecting pipe 5. The check valve 13 is used for controlling the unidirectional flow of the fluid in the pipeline, and preventing the sewage flowing out of the chamber body 60 from flowing back.

The second control valve group 20 includes a second solenoid valve 21 and a second shutoff valve 22. The second control valve set 20 is used to control the flow of liquid through the line between the sump tank 50 and the trapway 72, i.e., to control the draining of waste water in the sump tank 50 to the trapway 72. The second port 52 of the water collection tank 50 is led to the trapway 72 through the second control valve block 20 and the connecting pipe 5, and the second port 52, the second stop valve 22, and the second solenoid valve 21 are connected in sequence through the connecting pipe 5.

The third control valve group 30 includes a third electromagnetic valve 31, a third cut valve 32, a fourth electromagnetic valve 41, and a fourth cut valve 42. The water collection tank 50 is connected to the external environment 74 and the ventilation port 63 of the cabin 60 by a third control valve block 30 and a connection pipe 5, the third control valve block 30 being used for regulating the air pressure inside the water collection tank 50.

The third solenoid valve 31 and the third shut-off valve 32 are used to control the flow of gas in the line between the second port 52 of the water collection tank 50 and the vent port 63 of the tank body 60. The vent port 63 of the cabin 60 and the third port 53 of the water collecting tank 50 are connected by a third control valve group 30, and the vent port 63, the third stop valve 32, the third solenoid valve 31 and the third port 53 are sequentially connected by a connecting pipe 5.

The fourth solenoid valve 41 and the fourth shut-off valve 42 are used to control the gas flow in the conduit between the second port 52 of the water collection tank 50 and the environment 74. The third port 53 of the water collection tank 50 is connected to the external environment 74 through the third control valve block 30 and the connection pipe 5, and the third port 53, the fourth stop valve 42 and the fourth solenoid valve 41 are sequentially connected through the connection pipe 5.

The automatic drainage device of the low-pressure chamber further comprises a drainage channel 1, wherein the drainage channel 1 is groove-shaped and is arranged below the floor of the chamber body 60, the drainage channel 1 is arranged at a high position and a low position, the low end of the drainage channel 1 is arranged at a sewage discharge port 61 of the chamber body 60, and sewage in the chamber body 60 can flow into the water collection tank 50 through the drainage channel 1 and the sewage discharge port 61 under the action of gravity.

The cabin 60 and the water collection tank 50 are both steel pressure-bearing containers. The cabin 60 needs to maintain a low pressure environment to meet the working requirements of the cabin 60, and the cabin 60 is made of a steel pressure-bearing container to bear the low pressure in the cabin. The water collecting tank 50 is used for collecting sewage discharged from the cabin 60 and is required to bear the action of liquid pressure; when the water collecting tank 50 is communicated with the cabin 60 through the pipeline, the air pressure in the water collecting tank 50 is consistent with that in the cabin 60, and at the moment, the water collecting tank 50 still needs to bear low air pressure; the water collection tank 50 is a steel pressure-bearing vessel to withstand the effects of low air pressure and liquid pressure. The cabin body 60, the water collecting tank 50 and the drainage channel 1 are made of steel materials, and the steel materials have good pressure bearing and deformation resistance and good antirust effect.

The water collection tank 50 is provided with a warning water level 55. The position of the arming water level 55 is within the range of the level sensor 40.

The level of the armed water level 55, the cabin 60 and the ports on the catchment tank 50 have different heights. The difference in height between the armed water level 55 and each port is as follows:

vent port 63> trapway port 61> first port 51> third port 53> armed water level 55> second port 52> trapway 72.

The third port 53 is positioned at a level above the armed water level 55 to prevent wastewater collected by the water collection tank 50 from flowing into the gas lines between the water collection tank 50 and the enclosure 60 and the external environment 74.

The level of the armed water level 55 is higher than the level of the second port 52 such that the armed water level 55 is armed.

The horizontal position of the trapway port 61 is higher than the second port 52, ensuring that the waste water collected by the collection tank 50 can drain to the trapway 72.

The horizontal position of the blowdown port 61 is higher than that of the first port 51, and the horizontal position of the second port 52 is higher than that of the blowdown channel 72, so that the pipeline where the first control valve group 10 or the second control valve group 20 is located is in a communicated state, and when no air pressure difference exists between the two ends of the pipeline, sewage can automatically flow under the action of gravity.

The second port 52 is provided at the bottom of the water collection tank 50 so that the sewage in the water collection tank 50 can be completely discharged.

The water collection tank 50 is used for collecting sewage discharged from the cabin 60, the sensor is used for monitoring the liquid level in the water collection tank 50, the first control valve group 10 is used for controlling the sewage flow of the pipeline between the water collection tank 50 and the cabin 60, the second control valve group 20 is used for controlling the sewage flow between the water collection tank 50 and the sewage drainage channel 72, and the third control valve group 30 is used for adjusting the air pressure in the water collection tank 50.

The system controls the action of the control valve group according to the liquid level signal of the water collecting tank 50 fed back by the sensor so as to control the action of each electromagnetic valve, and then the control valve group is arranged according to the height positions of the upper ports of the water collecting tank 50 and the cabin body 60 so that fluid automatically flows in the pipeline under the action of gravity.

When the ventilation port 63 of the cabin 60 is communicated with the water collection tank 50, the air pressure in the cabin 60 is consistent with that in the water collection tank 50, the sewage discharge port 61 of the cabin 60 is communicated with the pipeline between the water collection tank 50, and the sewage in the cabin 60 can be automatically discharged into the water collection tank 50 under the action of gravity.

When the cabin 60 is connected to the external environment 74, the air pressure in the water collecting tank 50 is consistent with the external environment 74, the water collecting tank 50 is connected to the sewage draining channel 72, and the sewage in the water collecting tank 50 can be automatically drained to the sewage draining channel 72 under the action of gravity.

When the water collecting tank 50 is communicated with the cabin 60, the pipeline between the water collecting tank 50 and the external environment 74 is cut off through the third control valve group 30, and the pipeline between the water collecting tank 50 and the sewage draining channel 72 is cut off through the second control valve group 20, so that when the cabin 60 drains sewage into the water collecting tank 50, the cabin 60 is not influenced by the external environment 74; when the water collecting tank 50 is communicated with the sewage draining passage 72, the pipeline between the cabin body 60 and the water collecting tank 50 is cut off by the first control valve group 10 and the third control valve group 30, so that the cabin body 60 is not influenced when the water collecting tank 50 drains the sewage draining passage 72.

The automatic drainage device of the low-pressure chamber provided by the utility model can realize the automatic drainage of the chamber body 60 through the following steps:

s1, the first stop valve 12, the second stop valve 22, the third stop valve 32 and the fourth stop valve 42 are in a normally open state, and the stop valves are communicated with pipelines at two ends of the stop valves;

s2, the liquid level in the water collecting tank 50 is lower than the warning water level 55, the second electromagnetic valve 21 and the fourth electromagnetic valve 41 are closed, the first electromagnetic valve 11 and the third electromagnetic valve 31 are opened, the sewage discharge port 61 of the cabin body 60 is communicated with the pipeline between the first ports 51 of the water collecting tank 50, the ventilation port 63 of the cabin body 60 is communicated with the pipeline between the third ports 53 of the water collecting tank 50, the environment of the cabin body 60 is a low-pressure environment, if the air pressure in the water collecting tank 50 is higher than the air pressure in the cabin body 60, the redundant air in the water collecting tank 50 can enter the cabin body 60 and is pumped away by the air pumping device of the cabin body, the air pressure in the cabin body 60 and the water collecting tank 50 is consistent, and the sewage in the cabin body 60 automatically flows into the water collecting tank 50 through the sewage discharge port 61 and the first ports 51, and the normal pressure environment of the external environment 74 does not affect the low pressure environment in the cabin 60, and the communication pipeline between the cabin 60 and the water collection tank is shown in fig. 2;

s3, when the liquid level in the water collection tank 50 reaches the warning water level 55, the first electromagnetic valve 11 and the third electromagnetic valve 31 are closed, the second electromagnetic valve 21 and the fourth electromagnetic valve 41 are opened, the second port 52 of the water collection tank 50 is communicated with the pipeline between the sewage discharge channel 72, the third port of the water collection tank 50 is communicated with the pipeline between the external environment 74, the air pressure of the water collection tank 50 is consistent with that of the external environment 74, the sewage in the water collection tank 50 is discharged to the sewage discharge channel 72 through the second port 52, and the normal pressure environment in the water collection tank 50 does not influence the low pressure environment in the cabin 60, at the moment, the pipeline between the water collection tank 50 and the cabin 60 is not communicated, and the communication pipeline between the water collection tank 50 and the sewage discharge channel 72 and the external environment 74 is shown in FIG. 3;

s4, the liquid level in the water collecting tank 50 is lower than the warning water level 55, and S2-S3 are repeated.

The first stop valve 12, the second stop valve 22, the third stop valve 32 and the fourth stop valve 42 are arranged, maintenance of the electromagnetic valve is facilitated, and the electromagnetic valve is guaranteed not to be affected by low-pressure environment in the cabin 60 when the electromagnetic valve is maintained by setting relative positions of the electromagnetic valve and the stop valves. The stop valve adopts mechanical rotation type stop valve, and mechanical rotation type stop valve simple structure, accessible manual rotation valve rod control pipeline in fluidic break-make, convenient operation, the stop valve is in normally open state at normal conditions.

When the first solenoid valve 11 fails: the first stop valve 12 and the third stop valve 32 are closed to ensure the stability of the low pressure environment in the tank body 60 and to stop the sewage flow at the first stop valve 12, and then the first electromagnetic valve 11 is repaired, at which time the communication pipes among the tank body 60, the water collection tank 50, the external environment 74 and the sewage drainage channel 72 are as shown in fig. 3.

In the event of failure of the third solenoid valve 31: the first stop valve 12 and the third stop valve 32 are closed to ensure the stability of the low pressure environment in the tank 60, and then the third solenoid valve 31 is repaired, at which time the communication pipes among the tank 60, the water collection tank 50, the external environment 74 and the sewage passage 72 are as shown in fig. 3.

When the second electromagnetic valve 21 fails: the second stop valve 22 and the fourth stop valve 42 are closed, the sewage in the tank body 60 is not influenced to be discharged to the water collecting tank 50, the sewage flow at the second stop valve 22 is cut off, and then the second electromagnetic valve 21 is maintained, at which time the communication pipeline among the tank body 60, the water collecting tank 50, the external environment 74 and the sewage draining channel 72 is shown in fig. 2.

Failure of the fourth solenoid valve 41: the second stop valve 22 and the fourth stop valve 42 are closed, the sewage in the chamber 60 is not influenced to be discharged to the water collecting tank 50, and then the fourth solenoid valve 41 is repaired, and the communication pipeline among the chamber 60, the water collecting tank 50, the external environment 74 and the sewage drainage channel 72 is shown in fig. 2.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims (10)

1. An automatic drainage device of a low-pressure chamber is characterized by comprising: a sensor, a water collecting tank, a control valve and a connecting pipeline between the sensors and the water collecting tank for automatic drainage of the cabin body, the low-pressure cabin automatic drainage device is communicated with a sewage channel and the external environment, the sensor is arranged in the water collecting tank, the control valve comprises a first control valve group, a second control valve group and a third control valve group, the water collecting tank is provided with a first port, a second port and a third port, the cabin body is provided with a sewage discharge port and a ventilation port, the first control valve block connects the first port and the trapway port, the second control valve block connects the second port and the trapway, the third control valve block connecting the third port, the vent port and the ambient environment, the first port and the second port have a lower horizontal position than the trapway and the second port has a higher horizontal position than the trapway.

2. The automatic drain device for a low pressure tank according to claim 1, wherein the tank body and the water collection tank are both steel pressure-bearing containers.

3. The automatic drain device for low-pressure tank according to claim 1, further comprising a drain channel having a groove shape, the drain channel being disposed under the floor of the bottom of the tank body, the drain channel having a high position and a low position, the drain channel being formed from a steel material and extending from a distal end thereof to the soil discharge port.

4. The automatic drain for a low pressure tank of claim 1, wherein said sensor is a level sensor.

5. The automatic drain of a lower pressure tank as claimed in claim 4, wherein said catch tank is provided with a warning level, said warning level being positioned within an operating range of said level sensor, a horizontal position of said third port and said blowdown port being higher than said warning level, and a horizontal position of said second port being lower than said warning level.

6. The automatic drain of a low pressure tank of claim 1, wherein said first set of control valves includes a first solenoid valve, said second set of control valves includes a second solenoid valve, said third set of control valves includes a third solenoid valve and a fourth solenoid valve, said third solenoid valve connects said third port and said vent port, and said fourth solenoid valve connects said third port and said ambient environment.

7. The automatic drain of the low pressure tank as claimed in claim 6, wherein the first control valve group includes a first cut-off valve, the third control valve group includes a third cut-off valve, a piping path from the first cut-off valve to the drain port is shorter than that of the first solenoid valve, and a piping path from the third cut-off valve to the vent port is shorter than that of the third solenoid valve.

8. The automatic drain device for a low pressure tank according to claim 7, wherein the second control valve group includes a second shut-off valve, the third control valve group includes a fourth shut-off valve, a piping path from the second shut-off valve to the sump tank is shorter than that of the second solenoid valve, and a piping path from the fourth shut-off valve to the sump tank is shorter than that of the fourth solenoid valve.

9. The automatic drain for a low pressure tank of claim 7, wherein said shut-off valve is a mechanical rotary shut-off valve.

10. The automatic drain for a low pressure tank of claim 1, wherein said first set of control valves includes a check valve, said check valve being directly connected to said blowdown port through said connecting conduit.

Images