CN213018873U - Helium recovery equipment for detecting air tightness of electric power gas-filled cabinet - Google Patents
Helium recovery equipment for detecting air tightness of electric power gas-filled cabinet Download PDFInfo
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- CN213018873U CN213018873U CN202022059915.3U CN202022059915U CN213018873U CN 213018873 U CN213018873 U CN 213018873U CN 202022059915 U CN202022059915 U CN 202022059915U CN 213018873 U CN213018873 U CN 213018873U
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Abstract
The utility model discloses a helium recovery device for detecting the air tightness of an electric power gas charging cabinet, which comprises a main gas pipe which passes through a vacuum box and is communicated with the gas charging cabinet, wherein a helium recovery device is connected on the main gas pipe, the helium recovery device comprises a gas storage tank, a recovery tank and a vacuum tank, the recovery tank and the vacuum tank are arranged in parallel and are communicated with the gas charging cabinet, and the recovery tank and the vacuum tank work in a staggered way to realize the helium recovery of the gas charging cabinet and finally store the helium in the gas storage tank; the utility model discloses a retrieve jar among the helium recovery equipment and the parallelly connected setting of vacuum tank and all communicate with aerifing the cabinet, retrieve jar and the crisscross work of vacuum tank and realize carrying out the helium recovery and finally store the helium in the gas holder to aerifing the cabinet, effectual acceleration is retrieved the interior helium of aerifing the cabinet.
Description
Technical Field
The utility model belongs to electric power aerifys cabinet gas tightness check out test set field, more specifically the helium recovery plant that electric power aerifys cabinet gas tightness detected that says so relates to.
Background
The electric gas-filled cabinet is characterized in that high-voltage elements such as a bus, a circuit breaker, a disconnecting switch, a mutual inductor and the like are sealed in a shell filled with SF6 or other gases with lower pressure (0.1-0.5 mpa). The electric inflatable cabinet has the greatest advantage of being free from the influence of external environment, such as condensation, dirt, small animals, chemical substances and the like. Another advantage is that the use of compressed gas insulation (such as SF6, N2, or air) facilitates the miniaturization of the device.
Because the electric inflation cabinet needs to be filled with gas with lower pressure, the electric inflation cabinet is required to have good air tightness, and after the main structure of the electric inflation cabinet is completed, the air tightness detection is needed. The detection operation mainly comprises the steps of placing the electric gas-filled cabinet in a vacuum box, simultaneously vacuumizing the electric gas-filled cabinet and the vacuum box, introducing inert gas into the electric gas-filled cabinet for gas tightness detection, vacuumizing the electric gas-filled cabinet again after detection is finished, and introducing required low-pressure gas (such as SF6) into the vacuum electric gas-filled cabinet.
Among the prior art, electric power aerifys the cabinet and carries out the gas tightness and detect and generally adopt the helium to detect, aerify the cabinet gas tightness at electric power and detect the completion back, need retrieve the helium. On the one hand, the influence on the local environment of production caused by a large amount of helium discharged into the air is avoided, on the other hand, the helium is recycled, and the cost is saved. In the prior art, the helium gas is longer in recovery process, slow in recovery and lower in recovery rate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a helium recovery plant that electric power aerifys cabinet gas tightness detected can realize the quick recovery of helium, and the helium rate of recovery is high.
The utility model provides a helium recovery plant that electric power aerifys cabinet gas tightness detected, including passing the vacuum chamber and with the total trachea of aerifing the cabinet intercommunication, be connected with helium recovery unit on the total trachea, helium recovery unit includes gas holder, recovery jar and vacuum tank, retrieve the jar with the parallelly connected setting of vacuum tank and all with aerify the cabinet intercommunication, retrieve the jar with the vacuum tank staggered work realizes right it carries out helium recovery and finally stores the helium in the gas holder to aerify the cabinet.
Preferably, the recovery tank and the vacuum tank are connected in parallel to a main air pipe, and an automatic valve is respectively arranged between the respective air inlet of the recovery tank and the vacuum tank and the main air pipe.
Preferably, still be connected with first vacuum pump on the total trachea, retrieve the jar with the respective air inlet of vacuum jar respectively with the gas outlet of first vacuum pump links to each other, just retrieve the jar with be provided with an automatic valve between the respective air inlet of vacuum jar and the gas outlet of first vacuum pump respectively, the air inlet of first vacuum pump with be provided with an automatic valve between the total trachea.
Preferably, retrieve the jar the gas outlet with be provided with the compressor between the gas holder, be provided with an automatic valve on the air inlet of compressor and the gas outlet respectively, the gas outlet of vacuum tank with be provided with the second vacuum pump between the gas holder, be provided with an automatic valve on the air inlet of second vacuum pump and the gas outlet respectively.
Preferably, the recovery tank is connected with an air supplementing pump, and the air supplementing pump is connected with the helium generator.
Preferably, retrieve jar, vacuum tank and total trachea and be close to and aerify the cabinet and serve and equally divide and be provided with a pressure sensor respectively, the last controller that is connected with of pressure sensor.
Preferably, an air outlet of the air storage tank is connected with a third vacuum pump, and an air outlet of the third vacuum pump is provided with an automatic valve and is connected with a main air pipe.
Preferably, the main gas pipe is further connected with a fourth vacuum pump and a fifth vacuum pump, a gas inlet of the fourth vacuum pump is connected with the main gas pipe, a gas outlet of the fifth vacuum pump is connected with the main gas pipe, and a low-pressure sealing gas tank is connected to a gas inlet of the fifth vacuum pump.
The utility model discloses technical scheme's a helium recovery plant that electric power aerifys cabinet gas tightness detected's beneficial effect is:
1. retrieve jar and the parallelly connected setting of vacuum tank and all communicate with aerifing the cabinet, retrieve jar and the crisscross work of vacuum tank and realize carrying out helium recovery and finally store helium in the gas holder to aerifing the cabinet, effectual quickening is retrieved helium in aerifing the cabinet.
2. The vacuum tube is adopted for helium recovery, so that the recovery rate of helium in the gas-filled cabinet can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of the air tightness detection of the electric inflatable cabinet according to the technical scheme of the present invention,
fig. 2 the utility model discloses technical scheme's a helium recovery plant's that electric power aerifys cabinet gas tightness detected structural schematic diagram.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
As shown in fig. 1, the utility model discloses technical scheme an electric power aerifys cabinet gas tightness and detects the principle and does: the inflatable cabinet 100 to be tested is placed in the vacuum box 1 and then the sealed door of the vacuum box 1 is covered. Three pipe joints are arranged on the box body of the vacuum box 1, wherein one pipe joint is communicated with the inflatable cabinet 100 through a pipeline and extends outwards to the outside of the vacuum box 1. One end of the other two pipe joints is arranged in the vacuum box 1, the other end of the other two pipe joints extends out of the box body of the vacuum box 1 and is respectively connected with a vacuum box inflation system 5 and a vacuum box vacuum system 6, and the pipe joint connected with the vacuum box vacuum system 6 is also connected with a leakage detector 7. The vacuum box vacuum system 6 is used for vacuumizing the vacuum box 1, the leakage detector 7 is used for detecting the tightness of the inflating cabinet 100, and the vacuum box inflating system 5 is used for inflating air into the vacuum box 1 after the inflating cabinet 100 finishes low-pressure gas inflation, so that the box door of the vacuum box 1 can be conveniently opened. The outer end part of the pipe joint which is communicated with the gas-filled cabinet 100 and extends out of the vacuum box 1 is connected with a vacuum-pumping system 6, a helium gas recovery system 3 and a low-pressure gas inflation system 4, and a helium gas filling device is integrated on the helium gas recovery system 3. The working process is as follows: the vacuumizing system 6 firstly vacuumizes the air-filled cabinet 100, then a helium filling device in the helium recovery system 3 fills helium into the vacuum air-filled cabinet, the leak detector 7 is used for detecting the tightness, after the detection is finished, the helium recovery system 3 realizes the recovery of the helium in the air-filled cabinet 100, and after the recovery is finished, the low-pressure gas inflation system 4 is used for filling low-pressure gas with specified pressure, such as SF6, into the air-filled cabinet 100. After the low-pressure gas is inflated, the vacuum box inflation system 5 is opened to enable the vacuum in the vacuum box 1 to be lost, then the box door of the vacuum box is opened, and the inflatable cabinet is carried out.
As shown in fig. 2, it is the technical solution of the present invention that the helium recovery equipment structure of the electric gas-filled cabinet 100 is airtight. The helium recovery device for the airtight testing of the electric gas-filled tank 100 comprises a gas main 10 passing through the vacuum box and communicating with the gas-filled tank 100 (i.e. the gas main 10 connected to the pipe connector mentioned in the previous paragraph extending out of the vacuum box 1). The main gas pipe 10 is connected with a helium recovery device, the helium recovery device comprises a gas storage tank q1, a recovery tank q2 and a vacuum tank q3, the recovery tank q2 and the vacuum tank q3 are arranged in parallel and are communicated with the gas-filled cabinet 100, the recovery tank q2 and the vacuum tank q3 work in a staggered mode to recover helium from the gas-filled cabinet 100, and finally the helium is stored in the gas storage tank q 1.
Among the above-mentioned technical scheme, recovery tank q2 and vacuum tank q3 staggered work can realize not stopping recovery work to aerifing the interior helium of cabinet 100 promptly, and the effectual helium of accelerating in to aerifing the cabinet is retrieved, improves helium recovery efficiency. Retrieve jar q2 and vacuum tank q3 and all can realize carrying out recovery work to the helium, can each other be reserve, after a equipment (like retrieving jar q2) branch road breaks down, another equipment branch road can also carry out autonomous working, does not influence the normal recovery of helium. Adopt vacuum tank q3 to retrieve the helium in this technique, set up vacuum tank q3 internal volume as far as to be not less than inside the gas insulated cabinet 100, carry out the evacuation with vacuum tank q3, then according to pressure differential, open the back at vacuum tank q3 import, in the automatic vacuum tank q3 that gets into of helium in the gas insulated cabinet 100, the repetition is many times, can effectual improvement helium recovery efficiency.
Referring to fig. 2, a recovery tank q2 and a vacuum tank q3 are connected in parallel to the main gas pipe 10, and automatic valves v4 and v6 are respectively provided between the respective gas inlets of the recovery tank q2 and the vacuum tank q3 and the main gas pipe 10. The design of this structure realizes that recovery jar q2 and vacuum tank q3 are each other for reserve, and recovery jar q2 and vacuum tank q3 can also independently be used as by simultaneous working, can not exert an influence between the two, realizes foretell staggered work and each other is reserve independent work.
As shown in fig. 2, the main gas pipe 10 is further connected to a first vacuum pump m4, and respective gas inlets of the recovery tank q2 and the vacuum tank q3 are connected to a gas outlet of the first vacuum pump m 4. And automatic valves v9 and v10 are respectively arranged between the air inlets of the recovery tank q2 and the vacuum tank q3 and the air outlet of the first vacuum pump m 4. An automatic valve v5 is arranged between the air inlet of the first vacuum pump m4 and the main air pipe 10. The design of structure among this technical scheme for first vacuum pump m4 can be respectively for retrieving jar q2 and vacuum tank q3 work, will aerify in cabinet 100 helium suction recovery jar q2 and the vacuum tank q 3. The recovery tank q2 and the vacuum tank q3 share the same first vacuum pump, so that the equipment cost and the volume are reduced.
As shown in FIG. 2, a compressor c is arranged between the air outlet of the recovery tank q2 and the air storage tank q1, and an automatic valve v8 and an automatic valve v7 are respectively arranged on the air inlet and the air outlet of the compressor c. A second vacuum pump m3 is arranged between the air outlet of the vacuum tank q3 and the air storage tank q1, and an automatic valve v11 and an automatic valve v12 are respectively arranged on the air inlet and the air outlet of the second vacuum pump m 3. The design of this structure realizes filling the helium that retrieves in retrieving jar q2 and the vacuum tank q3 into gas holder q1, keeps helium in concentrating in gas holder q1, on the one hand prepares for the sealed nature of remembering again of helium to detect, and on the other hand, reduces the interior atmospheric pressure of retrieving jar q2 and vacuum tank q3 as far as possible, is favorable to the recovery to the helium in gas insulated cabinet 100 for helium recovery speed and efficiency, improves the helium rate of recovery simultaneously.
As shown in fig. 2, a supplementary gas pump v13 is connected to the recovery tank q2, and the supplementary gas pump v13 is connected to a helium generator, which is a conventional device in the prior art. Because it is difficult for the compressor c to charge the helium gas in the recovery tank q2 into the gas storage tank q1 when the pressure of the recovery tank q2 is extremely low during recovery, a proper amount of helium gas is supplemented into the recovery tank q2 to ensure that the helium gas in the gas storage tank q1 is enough to meet the requirement of next detection.
As shown in fig. 2, the recovery tank q2, the vacuum tank q3 and the end of the main gas pipe 10 close to the gas-filled cabinet are respectively provided with a pressure sensor l1, a pressure sensor l2 and a pressure sensor l3, the pressure sensor l3 monitors the gas pressure in the gas-filled cabinet by the end of the main gas pipe 10 close to the gas-filled cabinet, the pressure sensors l1, l2 and l3 are connected with controllers, and the controllers automatically control all automatic valves, vacuum pumps and compressors simultaneously.
Referring to fig. 2, a third vacuum pump m5 is connected to the air outlet of the air reservoir q1, and an automatic valve v3 is provided at the air outlet of the third vacuum pump m5 and connected to the main air pipe 10. The structure of the helium filling device is that the helium is filled into the gas-filled cabinet 100, so as to realize the sealing detection of the gas-filled cabinet 100.
As shown in fig. 2, the main gas pipe 10 is further connected with a fourth vacuum pump m2 and a fifth vacuum pump m1, an air inlet of the fourth vacuum pump m2 is connected with the main gas pipe 10, an air outlet of the fifth vacuum pump m1 is connected with the main gas pipe 10, an air inlet of the fifth vacuum pump m1 is connected with a low-pressure sealing gas tank q4, and sf6 gas is contained in the low-pressure sealing gas tank q 4. The arrangement of the structure realizes that the gas such as low-pressure sealing gas sf6 is filled into the gas-filled cabinet 100.
As shown in fig. 2, for the utility model discloses technical scheme 100 helium recovery plant that gas tightness detected of electric power gas-filled cabinet can realize following working process:
1. evacuation of the gas-filled cabinet 100: the automatic valve v2 is automatically controlled to be opened by the controller, other automatic valves are all closed, then the fourth vacuum pump m2 is automatically opened by the controller, and the gas-filled cabinet 100 is vacuumized by the fourth vacuum pump m 2. After the vacuum pumping is completed, the controller first controls the automatic valve v2 to be closed, and then the fourth vacuum pump m2 is closed.
2. Filling helium into the inflatable cabinet 100 for detecting the sealing performance of the inflatable cabinet: after the air inflation cabinet 100 is vacuumized, the controller controls the automatic valve v3 and the third vacuum pump m5 to work, helium in the air storage tank q1 is filled into the air inflation cabinet 100, then the automatic valve v3 and the third vacuum pump m5 are closed, and high air pressure in the air inflation cabinet is kept for a period of time. And then the leak detector 7 connected to the vacuum box 1 is used for detecting the tightness of the inflatable cabinet 100 and detecting whether the inflatable cabinet 100 leaks air. If the leakage occurs, the vacuum box needs to be opened, the inflatable cabinet filled with the helium is moved out, the inflatable cabinet enters a suction gun leakage detection mode, and suspicious points such as joints, welding seams and the like are detected to determine leakage points. If no gas is leaked, the next operation (helium recovery) is carried out.
3. And (3) recovering helium: before helium is recovered, the recovery tank q2 and the vacuum tank q3 are kept in a vacuum state, the automatic valve v4 is controlled to be opened by the controller, and the helium in the gas-filled cabinet 100 automatically enters the recovery tank q2 in the vacuum state under the action of the pressure difference. When the pressures extracted by the pressure sensors l1 and l3 are close, the first vacuum pump m4 and the automatic valves v9 and v5 are started, and the helium in the inflator 100 is actively pumped into the recovery tank q2 by the first vacuum pump m 4. When the pressure sensor l1 changes slowly, the controller is manually controlled so that the controller closes the automatic valves v4, v9 and the first vacuum pump m4, and then opens the automatic valve v6 so that the helium gas in the inflator 100 enters the vacuum tank q3 in a vacuum state. When the values of the pressure sensors l2 and l3 are close, the automatic valve v6 is controlled to be closed, the first vacuum pump m4, the automatic valves v10 and v5 are controlled to be started, and the helium in the gas-filling cabinet 100 is actively pumped into the vacuum tank q3 by the first vacuum pump m 4. When the vacuum tank q3 works, the controller also controls the compressor c and the automatic valves v7 and v8 to work, helium in the recovery tank q2 is pressed into the air storage tank q1, and the automatic valves v7 and v8 stop working when the recovery tank q2 returns to vacuum or approaches to the vacuum chamber compressor c. When the pressure sensor l2 on the vacuum tank q3 changes slowly, the manual control controller closes the branch of the vacuum tank q3, opens the branch of the recovery tank q2, and controls the second vacuum pump m3 to work to vacuumize the vacuum tank q 3. Therefore, the recovery tank q2 and the vacuum tank q3 work repeatedly in a crossed mode and return to a vacuum state repeatedly, the helium recovery speed and efficiency in the gas-filled cabinet 100 are improved, and the helium recovery rate is also improved.
4. Filling low-pressure air (sf6) into the inflatable cabinet: the controller controls the automatic valve v1 and the fifth vacuum pump m1 to work, and sf6 low-pressure air is filled into the inflating cabinet.
The controller and the method and principle for controlling the controller in the present invention all adopt the product or method of the structure in the prior art, and no special innovation is made here.
It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. The structures, devices, and methods of operation of the present invention, not specifically described and illustrated, are generally practiced by those of ordinary skill in the art without specific recitation or limitation.
Claims (8)
1. The utility model provides a helium recovery plant that cabinet gas tightness detected is aerifyd to electric power, its characterized in that, including passing the vacuum chamber and with the total trachea of aerifing the cabinet intercommunication, be connected with helium recovery unit on the total trachea, helium recovery unit includes gas holder, recovery jar and vacuum tank, retrieve the jar with the parallelly connected setting of vacuum tank and all with aerify the cabinet intercommunication, retrieve the jar with vacuum tank staggered work realizes right it carries out helium recovery and finally stores helium in the gas holder to aerify the cabinet.
2. The helium recovery equipment for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein the recovery tank and the vacuum tank are connected in parallel to a main air pipe, and an automatic valve is respectively disposed between the respective air inlets of the recovery tank and the vacuum tank and the main air pipe.
3. The helium recovery equipment for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein a first vacuum pump is further connected to the main gas pipe, respective gas inlets of the recovery tank and the vacuum tank are respectively connected to a gas outlet of the first vacuum pump, an automatic valve is respectively disposed between the respective gas inlets of the recovery tank and the vacuum tank and a gas outlet of the first vacuum pump, and an automatic valve is disposed between the gas inlet of the first vacuum pump and the main gas pipe.
4. The helium recovery equipment for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein a compressor is arranged between the air outlet of the recovery tank and the air storage tank, an automatic valve is respectively arranged on the air inlet and the air outlet of the compressor, a second vacuum pump is arranged between the air outlet of the vacuum tank and the air storage tank, and an automatic valve is respectively arranged on the air inlet and the air outlet of the second vacuum pump.
5. The helium gas recovery device for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein an air supplement pump is connected to the recovery tank, and the air supplement pump is connected to the helium gas generator.
6. The helium recovery equipment for detecting the airtightness of the electric inflatable cabinet as claimed in claim 1, wherein a pressure sensor is respectively disposed on the end of said recovery tank, said vacuum tank and said gas main near the inflatable cabinet, and a controller is connected to said pressure sensors.
7. The helium gas recovery equipment for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein a third vacuum pump is connected to an air outlet of the air storage tank, and an automatic valve is provided on an air outlet of the third vacuum pump and connected to a main air pipe.
8. The helium recovery equipment for the airtightness detection of the electric inflatable cabinet according to claim 1, wherein a fourth vacuum pump and a fifth vacuum pump are further connected to the main gas pipe, an air inlet of the fourth vacuum pump is connected to the main gas pipe, an air outlet of the fifth vacuum pump is connected to the main gas pipe, and an air inlet of the fifth vacuum pump is connected to a low-pressure sealing gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022059915.3U CN213018873U (en) | 2020-09-18 | 2020-09-18 | Helium recovery equipment for detecting air tightness of electric power gas-filled cabinet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022059915.3U CN213018873U (en) | 2020-09-18 | 2020-09-18 | Helium recovery equipment for detecting air tightness of electric power gas-filled cabinet |
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| CN213018873U true CN213018873U (en) | 2021-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235301A (en) * | 2021-11-09 | 2022-03-25 | 上海贤日测控科技有限公司 | Air tightness detection system and method thereof |
| CN114235301B (en) * | 2021-11-09 | 2024-05-03 | 上海贤日测控科技有限公司 | Air tightness detection system and method thereof |
-
2020
- 2020-09-18 CN CN202022059915.3U patent/CN213018873U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235301A (en) * | 2021-11-09 | 2022-03-25 | 上海贤日测控科技有限公司 | Air tightness detection system and method thereof |
| CN114235301B (en) * | 2021-11-09 | 2024-05-03 | 上海贤日测控科技有限公司 | Air tightness detection system and method thereof |
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