CN111483969B - Liquid working medium filling device and method applied to loop system - Google Patents
Liquid working medium filling device and method applied to loop system Download PDFInfo
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- CN111483969B CN111483969B CN202010322868.9A CN202010322868A CN111483969B CN 111483969 B CN111483969 B CN 111483969B CN 202010322868 A CN202010322868 A CN 202010322868A CN 111483969 B CN111483969 B CN 111483969B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G5/00—Ground equipment for vehicles, e.g. starting towers, fuelling arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/58—Arrangements of pumps
- B67D7/62—Arrangements of pumps power operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The invention discloses a liquid working medium filling device and a method applied to a loop system, which comprises a liquid storage tank, an overflow tank, a vacuum pump set, a filter, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, wherein one end of the first connecting pipe is a nitrogen interface, and the other end of the first connecting pipe is connected with the liquid storage tank; one end of a second connecting pipe is a backflow interface, the other end of the second connecting pipe is connected with an overflow tank, the two ends of a third connecting pipe are respectively connected with the overflow tank and a vacuum pump set, one end of a fourth connecting pipe is a filling interface, the other end of the fourth connecting pipe is connected with a first connecting pipe, and the two ends of a fifth connecting pipe are respectively connected with a liquid storage tank and the third connecting pipe. The advantages are that: the functions of degassing the working medium, vacuumizing the system, filling the loop system, filling the single-path system, blowing and discharging the liquid and the like can be realized through the control of the valve, the filling effect of the liquid loop system is improved, the content of the gas in the liquid loop system is reduced, and the operation effect of the system is improved.
Description
Technical Field
The invention relates to the technical field of aerospace thermal equipment, in particular to a liquid working medium filling device and method applied to a loop system.
Background
At present, in the technical fields of aerospace, weapons, thermal engineering and the like, a plurality of complex closed liquid working medium loops exist. A plurality of branch circuits are connected in series and in parallel in the complex liquid working medium loop, the flow resistance of each branch circuit is inconsistent, and some loop circuits even form a grid shape. A traditional one-way liquid flow path system (a one-way system for short) can fill liquid in a mode of externally connecting a pump, but for a complex liquid working medium loop, working medium cannot be brought in a pump driving mode. In addition, even if a pump is used to drive the filling one-way system, a large amount of gas originally in the system can be retained, so that the system has poor operation effect, and the performance of the system and the service life of part of components (such as the pump) are reduced. Therefore, a more advanced working medium filling mode is needed to meet the filling requirement of the liquid working medium loop, and a better filling effect can be obtained, so that more working media can be filled in the loop system as much as possible.
Disclosure of Invention
The invention aims to provide a liquid working medium filling device and a liquid working medium filling method applied to a loop system, so that the problems in the prior art are solved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a liquid working medium filling device applied to a loop system comprises a liquid storage tank, an overflow tank, a vacuum pump set, a filter, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, wherein one end of the first connecting pipe is a freely arranged nitrogen interface, and the other end of the first connecting pipe is connected with the liquid storage tank; one end of the second connecting pipe is a freely arranged backflow interface, the other end of the second connecting pipe is connected with the overflow tank, the two ends of the third connecting pipe are respectively connected with the overflow tank and the vacuum pump set, one end of the fourth connecting pipe is a freely arranged filling interface, the other end of the fourth connecting pipe is connected with the first connecting pipe, the two ends of the fifth connecting pipe are respectively connected with the liquid storage tank and the third connecting pipe, the filter is arranged on the fifth connecting pipe, and the fifth connecting pipe is communicated with the fourth connecting pipe.
Preferably, the first connecting pipe is provided with a nitrogen inlet valve and a first nitrogen vacuum valve in sequence along the direction from the nitrogen interface to the liquid storage tank.
Preferably, a liquid storage tank pressure gauge and a liquid storage tank liquid level gauge are arranged on the liquid storage tank, a liquid storage tank safety valve, a liquid storage tank deflation valve and a liquid storage tank liquid feeding pipe communicated with the liquid storage tank are arranged at the top of the liquid storage tank, one end, far away from the liquid storage tank, of the liquid storage tank liquid feeding pipe is freely arranged as a liquid storage tank liquid feeding interface, and a liquid storage tank liquid feeding valve is arranged on the liquid storage tank liquid feeding pipe; the liquid storage tank is characterized in that a liquid storage tank liquid discharge pipe is connected to the bottom of the liquid storage tank, one end, far away from the liquid storage tank, of the liquid storage tank liquid discharge pipe is freely provided with a liquid storage tank liquid discharge interface, and a liquid storage tank liquid discharge valve and a liquid storage tank filling valve are sequentially arranged on the liquid storage tank liquid discharge pipe along the direction from the liquid storage tank liquid discharge interface to the liquid storage tank.
Preferably, the second connecting pipe is along the backward flow interface arrives in the direction of overflow jar has set gradually backward flow mouth vacuum gauge and backflow valve, backward flow mouth vacuum gauge through backward flow mouth vacuum gauge valve with the second connecting pipe links to each other.
Preferably, be provided with overflow tank level gauge on the overflow jar, overflow tank top is provided with overflow tank safety valve, overflow tank bottom is connected with the overflow jar fluid-discharge tube, the overflow jar fluid-discharge tube is kept away from the one end of overflow jar freely sets up to overflow jar flowing back interface, be provided with overflow jar flowing back valve on the overflow jar fluid-discharge tube.
Preferably, the third connecting pipe is provided with a pump set main valve, a pump outlet vacuum gauge and an overflow tank vacuum valve in sequence in the direction from the backflow port to the overflow tank, the pump outlet vacuum gauge is connected to the third connecting pipe through a pump outlet vacuum gauge valve, the vacuum pump set comprises at least one vacuum pump connected to the third connecting pipe, each vacuum pump is connected to the third connecting pipe through a vacuum pump connecting pipe, and each vacuum pump connecting pipe is provided with a vacuum pump valve.
Preferably, a filling port pressure gauge, a filling port vacuum gauge and a second nitrogen vacuum valve are sequentially arranged on the fourth connecting pipe in the direction from the filling port to the first connecting pipe, and the fourth connecting pipe is connected between the nitrogen inlet valve and the first nitrogen vacuum valve; and the filling port vacuum gauge is connected with the fourth connecting pipe through a filling port vacuum gauge valve.
Preferably, one end of the fifth connecting pipe is connected to a liquid storage tank liquid discharge pipe between the liquid storage tank liquid discharge valve and the liquid storage tank filling valve, and the other end of the fifth connecting pipe is connected to a third connecting pipe between the pump outlet vacuum gauge and the overflow tank vacuum valve; the connection point of the fifth connecting pipe and the fourth connecting pipe is positioned between the filling port vacuum gauge and the second nitrogen vacuum valve, the filter is arranged on the fifth connecting pipe between the fourth connecting pipe and the liquid discharge pipe of the liquid storage tank, and the fifth connecting pipe is provided with a filter bypass valve connected with the filter in parallel; and a fifth connecting pipe between the third connecting pipe and the fourth connecting pipe is provided with a filling passage vacuum valve.
The invention also aims to provide a liquid working medium filling method applied to a loop system, which is realized by using any one of the filling devices, and comprises the following steps,
s1, opening a first nitrogen vacuum valve, a second nitrogen vacuum valve, a filling passage vacuum valve, a pump set main valve, a vacuum pump valve and a vacuum pump set, and vacuumizing the working medium in the liquid storage tank; meanwhile, opening a pump outlet vacuum gauge to detect the vacuum pumping condition;
s2, connecting the loop system with a filling interface and a backflow interface, and then opening a backflow valve, an overflow tank vacuum valve, a filling passage vacuum valve, a pump set main valve, a vacuum pump valve and a vacuum pump set; simultaneously, opening a filling port vacuum gauge valve and a return port vacuum gauge valve, respectively detecting the vacuum degrees of two positions of a filling port and a return port, and closing each valve and a vacuum pump set after vacuumizing is finished;
s3, after the vacuum pumping is finished, the connection between the filling interface and the loop system is kept, the connection between the backflow interface and the loop system is disconnected, the nitrogen interface is connected to the nitrogen supply device, the nitrogen inlet valve and the first nitrogen vacuum valve are opened, and nitrogen is used for applying pressure to the liquid storage tank; and opening a filling valve of the liquid storage tank, and allowing the working medium in the liquid storage tank to sequentially pass through the filter and the filling interface under the action of pressure to enter the loop system.
Preferably, after the step S3, working medium blowing is further performed, specifically, communication between the filling interface and the loop system and communication between the nitrogen interface and the nitrogen supply device are maintained, the nitrogen inlet valve, the second nitrogen vacuum valve and the return valve are opened, and nitrogen enters the loop system to blow off liquid and is recovered to the liquid storage tank.
The invention has the beneficial effects that: the filling device and the method integrate the vacuum pump set, the liquid storage tank, the overflow tank, the nitrogen interface, the backflow interface and the filling interface together through designed pipelines, and can realize the functions of working medium degassing, system vacuumizing, loop system filling, single-path system filling, system blowing and liquid discharging and the like through the control of the valve, thereby improving the filling effect of the liquid loop system, reducing the internal gas content and improving the operation effect of the system; the filling device realizes multiple functions by controlling the opening and closing of the internal valve door on the premise of utilizing the external interface to connect the system and the equipment, realizes the repeated utilization of partial pipelines under different working conditions, has reasonable structure, is convenient to be connected with other systems, improves the integration level of the system, and further ensures the production safety and quality.
Drawings
FIG. 1 is a schematic view of a filling apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of degassing of a filling apparatus in an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a vacuum pumping operation of a filling device when filling the loop system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a filling device filled with a loop system according to an embodiment of the present invention;
FIG. 5 is a schematic view of the evacuation of the filling device during filling of the one-way system in an embodiment of the present invention;
FIG. 6 is a schematic diagram of a filling apparatus using a one-way system in an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating the blowing of the filling device in the embodiment of the invention.
1. A nitrogen interface; 2. a backflow interface; 3. a filling interface; 4. a liquid discharge interface of the liquid storage tank; 5. an overflow tank drain connector; 6. a liquid adding interface of the liquid storage tank; 7. a first vacuum pump; 8. a second vacuum pump; 9. a liquid storage tank; 10. an overflow tank; 11. a liquid storage tank pressure gauge; 12. a filling port pressure gauge; 13. a liquid level meter of the liquid storage tank; 14. an overflow tank level gauge; 15. a return port vacuum gauge; 16. pump outlet vacuum gauge; 17. a vacuum gauge at the filling port; 18. an overflow tank safety valve; 19. a safety valve of the liquid storage tank; 20. a filter; 21. a nitrogen inlet valve; 22. a first nitrogen vacuum valve; 23. a second nitrogen vacuum valve; 24. a liquid adding valve of the liquid storage tank; 25. a relief valve of the liquid storage tank; 26. a liquid storage tank filling valve; 27. a liquid discharge valve of the liquid storage tank; 28. a filter bypass valve; 29. a vacuum gauge valve of the filling port; 30. a return port vacuum gauge valve; 31. pump outlet vacuum gauge valve; 32. a return valve; 33. an overflow tank vacuum valve; 34. a filling passage vacuum valve; 35. an overflow tank drain valve; 36. a pump set main valve; 37. a first vacuum pump valve; 38. a second vacuum pump valve; 39. a first connecting pipe; 40. a second connecting pipe; 41. a third connecting pipe; 42. a fourth connecting pipe; 43. a fifth connecting pipe; 44. a loop system; 45. a nitrogen gas supply device; 46. a one-way system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example one
As shown in fig. 1, the present embodiment provides a liquid working medium filling device applied to a loop system 44, where the filling device includes a liquid storage tank 9, an overflow tank 10, a vacuum pump set, a filter 20, a first connection pipe 39, a second connection pipe 40, a third connection pipe 41, a fourth connection pipe 42, and a fifth connection pipe 43, one end of the first connection pipe 39 is a freely arranged nitrogen interface 1, and the other end of the first connection pipe 39 is connected to the liquid storage tank 9; one end of the second connecting pipe 40 is a freely arranged backflow connector 2, the other end of the second connecting pipe 40 is connected with the overflow tank 10, two ends of the third connecting pipe 41 are respectively connected with the overflow tank 10 and the vacuum pump set, one end of the fourth connecting pipe 42 is a freely arranged filling connector 3, the other end of the fourth connecting pipe 42 is connected with the first connecting pipe 39, two ends of the fifth connecting pipe 43 are respectively connected with the liquid storage tank 9 and the third connecting pipe 41, the filter 20 is arranged on the fifth connecting pipe 43, and the fifth connecting pipe 43 is communicated with the fourth connecting pipe 42.
In this embodiment, the first connecting pipe 39 is provided with a nitrogen inlet valve 21 and a first nitrogen vacuum valve 22 in sequence along the direction from the nitrogen interface 1 to the liquid storage tank 9.
In the embodiment, a liquid storage tank pressure gauge 11 and a liquid storage tank liquidometer 13 are arranged on the liquid storage tank 9, a liquid storage tank safety valve 19, a liquid storage tank air release valve 25 and a liquid storage tank liquid feeding pipe communicated with the liquid storage tank 9 are arranged at the top of the liquid storage tank 9, one end, far away from the liquid storage tank 9, of the liquid storage tank liquid feeding pipe is freely arranged to be a liquid storage tank liquid feeding interface 6, and a liquid storage tank liquid feeding valve 24 is arranged on the liquid storage tank liquid feeding pipe; the bottom of the liquid storage tank 9 is connected with a liquid storage tank liquid discharge pipe, one end of the liquid storage tank liquid discharge pipe, which is far away from the liquid storage tank, is freely arranged as a liquid storage tank liquid discharge interface 4, and the liquid storage tank liquid discharge pipe is sequentially provided with a liquid storage tank liquid discharge valve 27 and a liquid storage tank filling valve 26 along the direction from the liquid storage tank liquid discharge interface 4 to the liquid storage tank 9.
In this embodiment, the second connection pipe 40 is provided with a return port vacuum gauge 15 and a return valve 32 in sequence along the direction from the return port 2 to the overflow tank 10, and the return port vacuum gauge 15 is connected to the second connection pipe 40 through a return port vacuum gauge valve 30.
In this embodiment, be provided with overflow tank level gauge 14 on the overflow tank 10, overflow tank 10 top is provided with overflow tank safety valve 18, overflow tank 10 bottom is connected with the overflow tank fluid-discharge tube, the overflow tank fluid-discharge tube is kept away from the one end of overflow tank 10 freely sets up to overflow tank flowing back interface 5, be provided with overflow tank flowing back valve 35 on the overflow tank fluid-discharge tube.
In this embodiment, the third connecting pipe 41 is sequentially provided with a pump group main valve 36, a pump outlet vacuum gauge 16 and an overflow tank vacuum valve 33 in the direction from the backflow connector 2 to the overflow tank 10, and the pump outlet vacuum gauge 16 is connected to the third connecting pipe through a pump outlet vacuum gauge valve 31; the vacuum pump group comprises at least one vacuum pump connected with the third connecting pipe 41, each vacuum pump is respectively connected with the third connecting pipe 41 through a vacuum pump connecting pipe, and a vacuum pump valve is respectively arranged on each vacuum pump connecting pipe. Referring to fig. 1, two vacuum pumps, namely a first vacuum pump 7 and a second vacuum pump 8, are provided, the first vacuum pump 7 and the second vacuum pump 8 are respectively connected to a third connecting pipe 41 through a first vacuum pump connecting pipe and a second vacuum pump connecting pipe, and a first vacuum pump valve 37 and a second vacuum pump valve 38 are respectively provided on the first vacuum pump connecting pipe and the second vacuum pump connecting pipe.
In this embodiment, the fourth connecting pipe 42 is provided with a filling port pressure gauge 12, a filling port vacuum gauge 17 and a second nitrogen vacuum valve 23 in sequence along the direction from the filling port 3 to the first connecting pipe 39, and the fourth connecting pipe 42 is connected between the nitrogen inlet valve 21 and the first nitrogen vacuum valve 22; the fill port vacuum gauge 17 is connected to the fourth connecting pipe 42 via a fill port vacuum gauge valve 29.
In this embodiment, one end of the fifth connection pipe 43 is connected to the liquid discharge pipe of the liquid storage tank between the liquid discharge valve 27 of the liquid storage tank and the filling valve 26 of the liquid storage tank, and the other end of the fifth connection pipe 43 is connected to the third connection pipe 41 between the pump outlet vacuum gauge 16 and the vacuum valve 33 of the overflow tank; the connection point of the fifth connecting pipe 43 and the fourth connecting pipe 42 is positioned between the filling port vacuum gauge 17 and the second nitrogen vacuum valve 23, the filter 20 is arranged on the fifth connecting pipe 43 between the fourth connecting pipe 42 and the liquid discharge pipe of the liquid storage tank, and the fifth connecting pipe 43 is provided with a filter bypass valve 28 connected with the filter 20 in parallel; a filling path vacuum valve 34 is provided on a fifth connection pipe 43 between the third connection pipe 41 and the fourth connection pipe 42.
Example two
As shown in fig. 2 to 6, the present embodiment provides a method for filling a liquid working medium applied to a loop system, which can fill the loop system 44,
in this embodiment, referring to fig. 2, fig. 3 and fig. 4, when the loop system 44 is filled, a degassing-two-way evacuation-loop filling manner is adopted, as shown in fig. 2, firstly, the working medium in the liquid storage tank 9 should be degassed, specifically, the first nitrogen vacuum valve 22, the second nitrogen vacuum valve 23, the filling channel vacuum valve 34, the pump group main valve 36, the first vacuum pump valve 37 and the second vacuum pump valve 38 are opened, the first vacuum pump 7 and the second vacuum pump 8 are opened to evacuate the working medium in the liquid storage tank 9, and at the same time, the pump outlet vacuum gauge 16 is opened to detect the evacuation condition. Under low pressure, the gas dissolved in the working medium can escape from the interior of the working medium, and is finally pumped away by a vacuum pump set. And closing the valves and the vacuum pumps after the degassing is finished.
As shown in fig. 3, the loop system 44 is vacuumized, and the specific process is that the loop system 44 is respectively connected with the filling interface 3 and the backflow interface 2, and then the backflow valve 32, the overflow tank vacuum valve 33, the filling passage vacuum valve 34, the pump group main valve 36, the first vacuum pump valve 37 and the second vacuum pump valve 38 are opened, and the first vacuum pump 7 and the second vacuum pump 8 are opened, so that the two interfaces of the loop system 44 can be vacuumized simultaneously, and the vacuumizing speed is increased; meanwhile, the vacuum degree of the filling port vacuum gauge valve 29 and the vacuum degree of the return port vacuum gauge valve 30 can be respectively detected by opening the filling port vacuum gauge valve 29 and the return port vacuum gauge valve 30, and after the vacuum pumping is finished, the valves and the vacuum pumps are closed.
As shown in fig. 4, the loop system 44 is filled, specifically, the connection between the filling interface 3 and the loop system 44 is maintained, the connection between the backflow interface 2 and the loop system 44 is disconnected, the nitrogen interface 1 is connected to the nitrogen supply device 45, the nitrogen inlet valve 21 and the first nitrogen vacuum valve 22 are opened, and the nitrogen is used to apply pressure to the liquid storage tank 9; and opening the filling valve 26 of the liquid storage tank, and allowing the working medium in the liquid storage tank 9 to enter the loop system 44 through the filter 20 and the filling interface 3 in sequence under the action of pressure. It should be noted that, after the loop system 44 and the backflow connector 2 are disconnected, the vacuum degree inside the loop system 44 still needs to be maintained, and therefore, a self-sealing quick-change connector needs to be arranged on the loop system 44, so as to ensure the vacuum degree inside the loop system 44.
EXAMPLE III
In this embodiment, the filling device may also fill the one-way system 46, referring to fig. 2, 5 and 6, when filling the one-way system 46, a degassing-two-way evacuation-one-way filling manner is adopted, as shown in fig. 2, first, the working medium in the liquid storage tank 9 should be degassed, and the specific process includes opening the first nitrogen vacuum valve 22, the second nitrogen vacuum valve 23, the filling passage vacuum valve 34, the pump group main valve 36, the first vacuum pump valve 37 and the second vacuum pump valve 38, opening the first vacuum pump 7 and the second vacuum pump 8, evacuating the working medium in the liquid storage tank 9, and simultaneously, opening the pump outlet vacuum gauge 16, and detecting the evacuation condition. Under low pressure, the gas dissolved in the working medium can escape from the interior of the working medium, and is finally pumped away by a vacuum pump set. And closing the valves and the vacuum pumps after the degassing is finished.
As shown in fig. 5, the single-path system 46 is vacuumized, the vacuuming method of the single-path system 46 is consistent with the vacuuming method of the loop system 44, and the vacuuming speed can be increased by using the two interfaces. The specific process is that the single-path system 46 is respectively connected with the filling interface 3 and the backflow interface 2, then the backflow valve 32, the overflow tank vacuum valve 33, the filling passage vacuum valve 34, the pump group main valve 36, the first vacuum pump valve 37 and the second vacuum pump valve 38 are opened, the first vacuum pump 7 and the second vacuum pump 8 are opened, the two interfaces of the single-path system 46 can be simultaneously vacuumized, and the vacuumizing speed is increased; meanwhile, the vacuum degrees of the filling port vacuum gauge valve 29 and the return port vacuum gauge valve 30 are respectively detected by opening the filling port vacuum gauge valve 29 and the return port vacuum gauge valve 30, after the vacuum pumping is finished, the vacuum requirements are met in the one-way system 46, the overflow tank 10 and the connected pipelines, and the valves and the vacuum pumps are closed.
As shown in fig. 6, the one-way system 46 is filled, and the specific process is that after the evacuation is completed, the communication between the filling interface 3 and the backflow interface 2 and the one-way system 46 is maintained, meanwhile, the nitrogen interface 1 is connected to the nitrogen supply device 45, the nitrogen inlet valve 21 and the first nitrogen vacuum valve 22 are opened, nitrogen is used for applying pressure to the liquid storage tank 9, the backflow valve 32 is opened, the communication between the one-way system 46 and the overflow tank 10 is maintained, the liquid storage tank filling valve 26 is opened, and the working medium in the liquid storage tank 9 enters the one-way system 46 through the filter 20 and the filling interface 3 under the action of the pressure and then enters the overflow tank 10. Due to the flowing of the liquid, the trace gas remained in the one-way system 46 can be taken away into the overflow tank 10, so that a better filling effect is realized, and after the filling is finished, all valves are closed.
Example four
In this embodiment, no matter the loop system 44 or the one-way system 46 is filled, after the evacuation is completed, the working medium is required to be blown off, as shown in fig. 7, and the specific process is that after the evacuation is completed, the communication between the filling interface 3 and the backflow interface 2 and the loop system 44 or the one-way system 46 and the communication between the nitrogen interface 1 and the nitrogen supply device 45 are maintained, the nitrogen inlet valve 21, the second nitrogen vacuum valve 23 and the backflow valve 32 are opened, and nitrogen enters the loop system 44 or the one-way system 46 to blow off the liquid and is recovered into the liquid storage tank 9. It should be noted that during the blowing process, the single-path system 46 is easier to blow, and for the loop system 44, the nitrogen can pass through all the branches and bypasses in the loop system 44 by using the adjustment of the internal valve, so as to blow the working medium.
Before filling, working medium enters the liquid storage tank 9 from the liquid storage tank liquid feeding interface 6 at the top of the liquid storage tank 9, and when liquid in the liquid storage tank 9 needs to be recovered, the liquid storage tank filling valve 26 and the liquid storage tank liquid discharging valve 27 are opened, and the liquid is discharged and recovered through the liquid storage tank liquid discharging interface 4. When the liquid in the overflow tank 10 needs to be recovered, the overflow tank drain valve 35 is opened to drain and recover the liquid through the overflow tank drain port 5.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention provides a liquid working medium filling device and a method applied to a loop system, wherein a vacuum pump set, a liquid storage tank, an overflow tank, a nitrogen interface, a backflow interface and a filling interface are integrated together through designed pipelines, and the functions of working medium degassing, system vacuumizing, loop system filling, single-path system filling, system blow-off and liquid drainage and the like can be realized through the control of a valve, so that the filling effect of the liquid loop system is improved, the internal gas content is reduced, and the operation effect of the system is improved; the filling device realizes multiple functions by controlling the on-off of the internal valve on the premise of utilizing the external interface to connect the system and the equipment, realizes repeated utilization of partial pipelines under different working conditions, has reasonable structure, is convenient to be connected with other systems, improves the integration level of the system, and further ensures the production safety and quality.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (6)
1. The utility model provides a be applied to liquid working medium filling device of loop system which characterized in that: the filling device comprises a liquid storage tank, an overflow tank, a vacuum pump set, a filter, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, wherein one end of the first connecting pipe is a freely arranged nitrogen interface, and the other end of the first connecting pipe is connected with the liquid storage tank; one end of the second connecting pipe is a freely arranged backflow interface, the other end of the second connecting pipe is connected with an overflow tank, the two ends of the third connecting pipe are respectively connected with the overflow tank and a vacuum pump set, one end of the fourth connecting pipe is a freely arranged filling interface, the other end of the fourth connecting pipe is connected with the first connecting pipe, the two ends of the fifth connecting pipe are respectively connected with a liquid storage tank and a third connecting pipe, the filter is arranged on the fifth connecting pipe, and the fifth connecting pipe is communicated with the fourth connecting pipe;
the first connecting pipe is sequentially provided with a nitrogen inlet valve and a first nitrogen vacuum valve along the direction from the nitrogen interface to the liquid storage tank;
the third connecting pipe is sequentially provided with a pump set main valve, a pump outlet vacuum gauge and an overflow tank vacuum valve in the direction from the backflow port to the overflow tank, the pump outlet vacuum gauge is connected to the third connecting pipe through the pump outlet vacuum gauge valve, the vacuum pump set comprises at least one vacuum pump connected with the third connecting pipe, each vacuum pump is respectively connected with the third connecting pipe through a vacuum pump connecting pipe, and each vacuum pump connecting pipe is respectively provided with a vacuum pump valve;
a filling port pressure gauge, a filling port vacuum gauge and a second nitrogen vacuum valve are sequentially arranged on the fourth connecting pipe in the direction from the filling port to the first connecting pipe, and the fourth connecting pipe is connected between the nitrogen inlet valve and the first nitrogen vacuum valve; the filling port vacuum gauge is connected with the fourth connecting pipe through a filling port vacuum gauge valve;
one end of the fifth connecting pipe is connected to a liquid storage tank liquid discharge pipe between the liquid storage tank liquid discharge valve and the liquid storage tank filling valve, and the other end of the fifth connecting pipe is connected to a third connecting pipe between the pump outlet vacuum gauge and the overflow tank vacuum valve; the connection point of the fifth connecting pipe and the fourth connecting pipe is positioned between the filling port vacuum gauge and the second nitrogen vacuum valve, the filter is arranged on the fifth connecting pipe between the fourth connecting pipe and the liquid discharge pipe of the liquid storage tank, and the fifth connecting pipe is provided with a filter bypass valve connected with the filter in parallel; and a fifth connecting pipe between the third connecting pipe and the fourth connecting pipe is provided with a filling passage vacuum valve.
2. The liquid working medium filling device applied to the loop system according to claim 1, wherein: the liquid storage tank is provided with a liquid storage tank pressure gauge and a liquid storage tank liquidometer, the top of the liquid storage tank is provided with a liquid storage tank safety valve, a liquid storage tank deflation valve and a liquid storage tank liquid feeding pipe communicated with the liquid storage tank, one end of the liquid storage tank liquid feeding pipe, which is far away from the liquid storage tank, is freely arranged as a liquid storage tank liquid feeding interface, and the liquid storage tank liquid feeding pipe is provided with a liquid storage tank liquid feeding valve; the liquid storage tank is characterized in that a liquid storage tank liquid discharge pipe is connected to the bottom of the liquid storage tank, one end, far away from the liquid storage tank, of the liquid storage tank liquid discharge pipe is freely provided with a liquid storage tank liquid discharge interface, and a liquid storage tank liquid discharge valve and a liquid storage tank filling valve are sequentially arranged on the liquid storage tank liquid discharge pipe along the direction from the liquid storage tank liquid discharge interface to the liquid storage tank.
3. The liquid working medium filling device applied to the loop system as claimed in claim 2, wherein: the second connecting pipe is being followed the backward flow interface arrives the backward flow mouth vacuum gauge and backflow valve have set gradually in the direction of overflow jar, the backward flow mouth vacuum gauge through backward flow mouth vacuum gauge valve with the second connecting pipe links to each other.
4. The liquid working medium filling device applied to the loop system according to claim 3, wherein: the overflow tank is provided with an overflow tank liquid level meter, the top of the overflow tank is provided with an overflow tank safety valve, the bottom of the overflow tank is connected with an overflow tank liquid discharge pipe, the overflow tank liquid discharge pipe is far away from one end of the overflow tank, the one end of the overflow tank is freely arranged to be an overflow tank liquid discharge interface, and the overflow tank liquid discharge pipe is provided with an overflow tank liquid discharge valve.
5. A liquid working medium filling method applied to a loop system, wherein the filling method is realized by using the filling device of any one of the claims 1 to 4, and the method is characterized in that: the filling method comprises the following steps of,
s1, opening a first nitrogen vacuum valve, a second nitrogen vacuum valve, a filling passage vacuum valve, a pump set main valve, a vacuum pump valve and a vacuum pump set, and vacuumizing the working medium in the liquid storage tank; meanwhile, opening a pump outlet vacuum gauge to detect the vacuum pumping condition;
s2, connecting the loop system with a filling interface and a backflow interface, and then opening a backflow valve, an overflow tank vacuum valve, a filling passage vacuum valve, a pump set main valve, a vacuum pump valve and a vacuum pump set; simultaneously, opening a filling port vacuum gauge valve and a return port vacuum gauge valve, respectively detecting the vacuum degrees of two positions of a filling port and a return port, and closing each valve and a vacuum pump set after vacuumizing is finished;
s3, after the vacuum pumping is finished, the connection between the filling interface and the loop system is kept, the connection between the backflow interface and the loop system is disconnected, the nitrogen interface is connected to the nitrogen supply device, the nitrogen inlet valve and the first nitrogen vacuum valve are opened, and nitrogen is used for applying pressure to the liquid storage tank; and opening a filling valve of the liquid storage tank, and allowing the working medium in the liquid storage tank to sequentially pass through the filter and the filling interface under the action of pressure to enter the loop system.
6. The method for filling the liquid working medium applied to the loop system according to claim 5, wherein the method comprises the following steps: and step S3, blowing off the working medium, namely, keeping the communication between the filling interface, the backflow interface and the loop system, keeping the communication between the nitrogen interface and the nitrogen supply device, opening the nitrogen inlet valve, the second nitrogen vacuum valve and the backflow valve, blowing off the liquid by the nitrogen entering the loop system, and recycling the liquid into the overflow tank.
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