CN118208655A - Sulfur hexafluoride recycling and inflating device - Google Patents
Sulfur hexafluoride recycling and inflating device Download PDFInfo
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- CN118208655A CN118208655A CN202211628490.0A CN202211628490A CN118208655A CN 118208655 A CN118208655 A CN 118208655A CN 202211628490 A CN202211628490 A CN 202211628490A CN 118208655 A CN118208655 A CN 118208655A
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- recovery
- inflating
- recycling
- valve
- inflation
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 63
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 63
- 238000004064 recycling Methods 0.000 title claims abstract description 48
- 238000011084 recovery Methods 0.000 claims abstract description 100
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to the technical field of sulfur hexafluoride recovery and inflation, in particular to a sulfur hexafluoride recovery and inflation device. The sulfur hexafluoride recycling and inflating device comprises an air storage tank, wherein the air storage tank is connected with a recycling and inflating main path, a recycling and inflating valve and a heat exchange assembly are arranged on the recycling and inflating main path, and the recycling and inflating main path is connected with a recycling branch and an inflating branch; the recovery branch is provided with a compressor and a recovery valve, and the tail end of the recovery branch is provided with a recovery interface; the pressure reducing valve is arranged on the inflation branch, and the end of the inflation branch is provided with an inflation interface; the sulfur hexafluoride recycling and inflating device further comprises an inflating bypass, a bypass valve is arranged on the inflating bypass, one end of the inflating bypass is connected between the air storage tank and the recycling and inflating valve, and the other end of the inflating bypass is connected between the recycling interface and the compressor. And an inflation bypass is arranged between the recycling inflation main path and the recycling branch path, so that residual gas in the gas storage tank is inflated out by using the compressor when inflation pressure reaches balance, and sulfur hexafluoride gas in the gas storage tank is fully utilized.
Description
Technical Field
The invention relates to the technical field of sulfur hexafluoride recovery and inflation, in particular to a sulfur hexafluoride recovery and inflation device.
Background
Currently, sulfur hexafluoride gas is widely used in various high-voltage switchgear for achieving gas insulation of the high-voltage switchgear. However, because of the large greenhouse effect of sulfur hexafluoride gas, how to recycle sulfur hexafluoride gas is important.
The Chinese patent application with the application publication number of CN107588325A discloses a sulfur hexafluoride gas recycling and charging device, when the device charges the gas in a gas storage tank into a device gas chamber, the device gas chamber is connected to a charging interface, a gas storage valve is opened, a charging function is started, a charging branch control valve is opened, a heater starts to heat, under the action of pressure difference, the gas in the gas storage tank enters the heater to heat after passing through the gas storage valve, a filtering device and the charging branch control valve, and is depressurized by a first depressurization valve and then is charged into the device gas chamber.
Because the sulfur hexafluoride gas recovery and charging device only charges the equipment air chamber by means of pressure difference when charging, the gas in the gas storage tank can not charge the equipment air chamber any more when the pressure is balanced, and the gas in the gas storage tank can not be fully utilized.
Disclosure of Invention
The invention aims to provide a sulfur hexafluoride recovery and inflation device, which solves the problem that in the prior art, when the sulfur hexafluoride recovery and inflation device is inflated, only the pressure difference is used for inflating an equipment air chamber, and when the pressure is balanced, the air in an air storage tank is not inflated to the equipment air chamber any more, so that the air in the air storage tank cannot be fully utilized.
In order to achieve the above purpose, the technical scheme of the sulfur hexafluoride recycling and inflating device of the invention is as follows:
The sulfur hexafluoride recycling and inflating device comprises an air storage tank, wherein the air storage tank is connected with a recycling and inflating main path, a recycling and inflating valve and a heat exchange assembly are arranged on the recycling and inflating main path, and the recycling and inflating main path is connected with a recycling branch and an inflating branch; the recovery branch is provided with a compressor and a recovery valve, and the tail end of the recovery branch is provided with a recovery interface; the pressure reducing valve is arranged on the inflation branch, and the end of the inflation branch is provided with an inflation interface; the sulfur hexafluoride recycling and inflating device further comprises an inflating bypass, a bypass valve is arranged on the inflating bypass, one end of the inflating bypass is connected between the air storage tank and the recycling and inflating valve, and the other end of the inflating bypass is connected between the recycling interface and the compressor.
The beneficial effects are that: on the basis of having two functions of auxiliary refrigeration liquefaction during recycling and auxiliary heating gasification during inflation, an inflation bypass is arranged between a recycling inflation main path and a recycling branch path, so that residual gas in a gas storage tank is inflated out by a compressor when inflation pressure reaches balance, sulfur hexafluoride gas in the gas storage tank is fully utilized, and waste is avoided.
As a further improvement, the heat exchange assembly comprises a refrigerating/heating unit and a heat exchanger, wherein the refrigerating/heating unit is connected with the heat exchanger, and the heat exchanger is arranged on the main recycling and charging path.
The beneficial effects are that: the refrigeration and heating are integrated, so that the structure is simplified, and the pipeline connection is simple and convenient.
As a further improvement, the recovery branch is provided with a recovery filter.
The beneficial effects are that: the sulfur hexafluoride gas recovered into the gas storage tank can be filtered through the recovery filter, so that the purity of the sulfur hexafluoride gas in the gas storage tank is ensured.
As a further improvement, a first pressure controller is arranged on the recovery branch between the recovery interface and the compressor, and the first pressure controller is in control connection with the compressor.
The beneficial effects are that: by the design, the compressor is controlled to be closed when the first pressure controller reaches a first set value, so that the equipment air chamber is prevented from being vacuumized, and the equipment is protected.
As a further development, a second pressure controller is arranged downstream of the compressor on the recovery branch, which is connected to the compressor control.
The beneficial effects are that: by the design, the compressor is controlled to be closed when the second pressure controller reaches the second set value, so that the damage to components downstream of the compressor caused by high pressure is avoided.
As a further development, the inflation branch is provided with an inflation filter upstream of the inflation interface.
The beneficial effects are that: the sulfur hexafluoride gas filled in the equipment air chamber can be filtered through the aerated filter, so that the purity of the sulfur hexafluoride gas in the equipment air chamber is ensured.
As a further improvement, the recycling and inflating main way is also provided with a switch valve, an external bypass is connected between the switch valve and the inflating bypass on the recycling and inflating main way, and the tail end of the external bypass is provided with a gas storage container interface used for being connected with an external gas storage container.
The beneficial effects are that: by the design, when sulfur hexafluoride gas in the gas storage tank is fully stored or is not fully used, the sulfur hexafluoride gas can be recovered or inflated through the external gas storage container.
As a further improvement, the recovery inflation valve, the recovery valve and the bypass valve are all electromagnetic valves.
The beneficial effects are that: the design is favorable for the automatic recovery and inflation of sulfur hexafluoride gas.
Drawings
Fig. 1 is a schematic structural view of a sulfur hexafluoride recovery inflator device of the invention.
In the figure: 11. a recycling interface; 12. a recovery filter; 13. a first pressure controller; 14. a recovery valve; 15. a compressor; 16. a second pressure controller; 17. an inflation interface; 18. a pressure reducing valve; 19. an air filter; 20. recycling the inflation valve; 21. a refrigerating/heating unit; 22. a heat exchanger; 23. a bypass valve; 24. a main valve; 25. a gas storage tank; 26. a switch valve; 27. a gas storage container interface; 28. recycling the inflation main way; 29. a recovery branch; 30. an inflation branch; 31. a charge bypass; 32. and (5) externally connecting a bypass.
Detailed Description
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Example 1 of sulfur hexafluoride recovery inflator device of the invention:
As shown in fig. 1, the sulfur hexafluoride recovery and inflation device comprises an air storage tank 25, wherein the air storage tank 25 is connected with a recovery and inflation main path 28, and the recovery and inflation main path 28 is connected with a recovery branch 29 and an inflation branch 30.
In this embodiment, the main valve 24, the recovery charging valve 20 and the heat exchange assembly are disposed on the recovery charging main path 28, the heat exchange assembly includes a refrigeration/heating unit 21 and a heat exchanger 22, the refrigeration/heating unit 21 is connected with the heat exchanger 22, and the heat exchanger 22 is disposed on the recovery charging main path 28 and located between the main valve 24 and the recovery charging valve 20.
In this embodiment, the recovery branch 29 is provided with a recovery filter 12, a compressor 15 and a recovery valve 14, the recovery valve 14 is located upstream of the compressor 15, the recovery filter 12 is located upstream of the recovery valve 14, and the end of the recovery branch 29 is provided with a recovery port 11. The sulfur hexafluoride gas recovered into the gas storage tank can be filtered through the recovery filter 12, so that the purity of the sulfur hexafluoride gas in the gas storage tank is ensured.
In this embodiment, the recovery branch 29 is provided with a first pressure controller 13 between the recovery filter 12 and the recovery valve 14, and the first pressure controller 13 is in control connection with the compressor 15 to control the compressor 15 to be turned off when the first pressure controller 13 reaches a first set value, so as to avoid evacuating the equipment air chamber. The recovery branch 29 is provided with a second pressure controller 16 at the downstream of the compressor 15, and the second pressure controller 16 is in control connection with the compressor 15 to control the compressor 15 to be turned off when the second pressure controller 16 reaches a second set value, so as to avoid damaging components at the downstream of the compressor 15 due to higher pressure.
In this embodiment, the pressure reducing valve 18 is disposed on the inflation branch 30, the end of the inflation branch 30 is provided with the inflation port 17, and the pressure reducing valve 18 is located upstream of the inflation port 17. The inflation branch 30 is provided with an inflation filter 19 at an upstream of the pressure reducing valve 18, and sulfur hexafluoride gas filled in the equipment air chamber can be filtered through the inflation filter 19 to ensure purity of the sulfur hexafluoride gas in the equipment air chamber.
As shown in fig. 1, the sulfur hexafluoride recovery and charging device further comprises a charging bypass 31, a bypass valve 23 is arranged on the charging bypass 31, one end of the charging bypass 31 is connected between the main valve 24 and the heat exchanger 22, and the other end of the charging bypass 31 is connected between the recovery filter 12 and the recovery valve 14.
In this embodiment, the recovery and aeration main path 28 is further provided with an on-off valve 26, and preferably, the on-off valve 26 is a ball valve. An external bypass 32 is connected between the switch valve 26 and the main valve 24 on the recycling and inflating main path 28, and the tail end of the external bypass 32 is provided with a gas storage container interface 27 for connecting with an external gas storage container. By such design, when the sulfur hexafluoride gas in the gas storage tank 25 is fully stored or is not fully used, the sulfur hexafluoride gas can be recovered or inflated through the external gas storage container.
In this embodiment, the recovery charge valve 20, the recovery valve 14, the bypass valve 23, and the main valve 24 are all solenoid valves. The design is favorable for the automatic recovery and inflation of sulfur hexafluoride gas.
When recovering, the container to be recovered is connected to the recovery port 11, the switch valve 26 is opened or an external gas storage container such as a steel bottle is connected to the gas storage container port 27, the recovery function is started, the recovery valve 14, the recovery inflation valve 20 and the main valve 24 are opened, the compressor 15 is started, the refrigeration/heating unit 21 is started to perform the refrigeration function, sulfur hexafluoride gas in the container to be recovered is filtered by the recovery filter 12, enters the compressor 15 for pressurization, enters the heat exchanger 22 for heat exchange, and the gas is liquefied at a reduced temperature and is stored in the gas storage tank 25 or the external gas storage container. In the above process, when the first pressure controller 13 detects that the pressure reaches the first set value, the recovery function is controlled to stop, and each component is closed; when the second pressure controller 16 monitors that the pressure is too high to exceed the second set value, the recovery function is controlled to stop, and the components are turned off.
When in inflation, the container to be inflated is connected to the inflation interface 17, the switch valve 26 is opened or an external gas container such as a steel bottle is connected to the gas container interface 27, and the inflation function is started. When the gas pressure in the gas storage tank 25 or the external gas storage container is far higher than the gas pressure in the container to be inflated, the main valve 24 and the recovery inflation valve 20 are opened by virtue of pressure difference for inflation, the refrigerating/heating unit 21 starts a heating function, sulfur hexafluoride liquid in the gas storage tank 25 or the external gas storage container enters the heat exchanger 22 for heat exchange, and the sulfur hexafluoride liquid is filtered by the inflation filter 19 and depressurized by the depressurization valve 18 for inflation after being heated and gasified. When the gas pressure in the container to be inflated reaches the requirement, the inflation function is closed, the main valve 24 and the recovery inflation valve 20 are closed, and the refrigerating/heating unit 21 is closed.
When the gas pressure in the gas storage tank 25 or the external gas storage container is close to the gas pressure in the container to be inflated, the residual sulfur hexafluoride gas in the gas storage tank 25 or the external gas storage container is difficult to be inflated by using the inflation function, and the pressurization inflation function is started. The main valve 24, the bypass valve 23 and the recovery valve 14 are opened, the compressor 15 is started, residual sulfur hexafluoride gas in the gas storage tank 25 or the external gas storage container enters the compressor 15 through the inflation bypass 31 to be pressurized, the residual sulfur hexafluoride gas is filtered by the inflation filter 19 and is depressurized by the depressurization valve 18, and then the residual sulfur hexafluoride gas is filled into the container to be inflated until the pressure of the sulfur hexafluoride gas in the gas storage tank 25 or the external gas storage container is approximately equal to one atmosphere, and the pressurizing and inflating functions are stopped, so that the sulfur hexafluoride gas in the gas storage tank 25 or the external gas storage container is fully utilized.
It should be noted that when the pressure of the gas in the gas storage tank 25 or the external gas storage container is close to the pressure of the gas in the container to be inflated, the pressure in the gas storage tank 25 or the external gas storage container is not particularly high, and at this time, the sulfur hexafluoride in the gas storage tank 25 or the external gas storage container is gas, so that heat exchange is not performed through the heat exchanger.
The device has the functions of assisting refrigeration and liquefaction during recovery, assisting heating and gasification during inflation, pressurizing and inflating residual gas during inflation pressure balance, and the like.
Example 2 of sulfur hexafluoride recovery inflator device of the invention:
The difference between this embodiment and embodiment 1 is that the heat exchange assembly includes a refrigeration/heating unit and a heat exchanger, the refrigeration/heating unit is connected to the heat exchanger, and the heat exchanger is disposed on the main recycling and charging path. In this embodiment, the heat exchange assembly includes refrigerating unit, heat exchanger and heater, and refrigerating unit is connected with the heat exchanger, and the heater is independently arranged, and heat exchanger and heater establish ties and set up on retrieving the inflatable main road.
Example 3 of sulfur hexafluoride recovery inflator device of the invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, a first pressure controller is provided on the recovery branch between the recovery port and the compressor, and the first pressure controller is connected to the compressor. In this embodiment, the first pressure controller is replaced by a first pressure gauge, and the value of the first pressure gauge is observed by the human eye to determine whether to turn off the compressor.
Example 4 of sulfur hexafluoride recovery inflator device of the invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, a second pressure controller is provided on the recovery branch downstream of the compressor, and the second pressure controller is connected to the compressor. In this embodiment, the second pressure controller is replaced by a second pressure gauge, and the value of the second pressure gauge is observed by the human eye to determine whether to turn off the compressor.
Example 5 of sulfur hexafluoride recovery inflator device of the invention:
The difference between this embodiment and embodiment 1 is that in embodiment 1, an external bypass is connected between the switching valve and the inflation bypass on the recycling inflation main path, and the end of the external bypass is provided with a gas storage container interface for connecting with an external gas storage container. In this embodiment, the volume of the air storage tank is large enough, and the recovery and inflation of sulfur hexafluoride are sufficient, and no external bypass is arranged on the main recovery and inflation path.
Example 6 of sulfur hexafluoride recovery inflator device of the invention:
The difference between this embodiment and embodiment 1 is that in embodiment 1, the recovery inflation valve, the recovery valve, and the bypass valve are all solenoid valves. In this embodiment, the recovery inflation valve, the recovery valve and the bypass valve are all common manual valves.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The sulfur hexafluoride recycling and inflating device comprises an air storage tank and is characterized in that the air storage tank is connected with a recycling and inflating main path, a recycling and inflating valve and a heat exchange assembly are arranged on the recycling and inflating main path, and the recycling and inflating main path is connected with a recycling branch path and an inflating branch path; the recovery branch is provided with a compressor and a recovery valve, and the tail end of the recovery branch is provided with a recovery interface; the pressure reducing valve is arranged on the inflation branch, and the end of the inflation branch is provided with an inflation interface; the sulfur hexafluoride recycling and inflating device further comprises an inflating bypass, a bypass valve is arranged on the inflating bypass, one end of the inflating bypass is connected between the air storage tank and the recycling and inflating valve, and the other end of the inflating bypass is connected between the recycling interface and the compressor.
2. The sulfur hexafluoride recovery and aeration device of claim 1, wherein said heat exchange assembly includes a refrigeration/heating unit and a heat exchanger, the refrigeration/heating unit being connected to the heat exchanger, the heat exchanger being disposed on the recovery and aeration main circuit.
3. The sulfur hexafluoride recovery inflator of claim 1 or 2, wherein a recovery filter is provided in the recovery branch.
4. The sulfur hexafluoride recovery inflator of claim 1 or 2, wherein a first pressure controller is disposed on the recovery branch between the recovery port and the compressor, the first pressure controller being in control connection with the compressor.
5. The sulfur hexafluoride recovery inflator of claim 1 or 2, wherein a second pressure controller is provided on the recovery branch downstream of the compressor, the second pressure controller being in control connection with the compressor.
6. A sulfur hexafluoride recovery inflator device in accordance with claim 1 or 2 wherein said inflation branch is provided with an inflation filter upstream of the inflation interface.
7. The sulfur hexafluoride recycling and inflating device according to claim 1 or 2, wherein the recycling and inflating main way is further provided with a switch valve, an external bypass is connected between the switch valve and the inflating bypass on the recycling and inflating main way, and the tail end of the external bypass is provided with an air storage container interface for being connected with an external air storage container.
8. The sulfur hexafluoride recovery and aeration device of claim 1 or 2 wherein said recovery aeration valve, recovery valve and bypass valve are all solenoid valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211628490.0A CN118208655A (en) | 2022-12-17 | 2022-12-17 | Sulfur hexafluoride recycling and inflating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211628490.0A CN118208655A (en) | 2022-12-17 | 2022-12-17 | Sulfur hexafluoride recycling and inflating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118208655A true CN118208655A (en) | 2024-06-18 |
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ID=91451003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211628490.0A Pending CN118208655A (en) | 2022-12-17 | 2022-12-17 | Sulfur hexafluoride recycling and inflating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118208655A (en) |
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2022
- 2022-12-17 CN CN202211628490.0A patent/CN118208655A/en active Pending
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