CN217605787U - Gas detection joint - Google Patents
Gas detection joint Download PDFInfo
- Publication number
- CN217605787U CN217605787U CN202220023804.3U CN202220023804U CN217605787U CN 217605787 U CN217605787 U CN 217605787U CN 202220023804 U CN202220023804 U CN 202220023804U CN 217605787 U CN217605787 U CN 217605787U
- Authority
- CN
- China
- Prior art keywords
- gas
- thimble
- port
- thimble tube
- gas detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000009795 derivation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 241000748087 Hymenothrix Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The application provides a gas detection connects, include, thimble pipe, adapter sleeve, set up at the inside direction through-hole of adapter sleeve, set up at the first connection port of adapter sleeve tip, set up the second connection port on thimble pipe and set up the air guide passageway on thimble pipe. Through the sliding fit connection of the thimble tube and the connecting sleeve, the problem that the detection joint is repeatedly disassembled and assembled due to repeated adjustment of the length of the thimble is avoided, the installation efficiency is improved, the effect that the detection joint and the equipment to be tested are connected in a sealing mode firstly is achieved, then the thimble slides to open the check valve is achieved, and the problem that the check valve cannot be completely matched to cause air leakage when the joint is installed and the equipment to be tested is opened is solved.
Description
Technical Field
The application relates to the technical field of equipment joints, in particular to a gas detection joint.
Background
With the continuous development of national economy and the continuous increase of the scale of electric power systems in China, the requirements on the safety and the reliability of the operation of a power grid are increasingly improved. The gas insulated fully-enclosed combined electrical apparatus (GIS) technology has been developed rapidly and gradually becomes the core equipment of the ultra-high voltage/ultra-high voltage transformer substation. The system has the advantages of high reliability, small occupied area, simple maintenance, long overhaul period and the like, so that the system is widely applied to a power system. Because the working field intensity of the GIS equipment is very high, the insulation margin is relatively small, so that once a certain insulation defect occurs in the equipment, the breakdown fault of the equipment is very easy to occur. In order to ensure safe and stable operation of a power grid, insulation defects of GIS equipment need to be found in time, accident potential is eliminated, and therefore gas in the GIS equipment needs to be detected regularly.
GIS is insulating gas seal's combined electrical apparatus, is whole seal structure, is provided with gaseous derivation port on it for be connected with check-out test set, the inside check valve that is provided with of derivation port, only can let out gaseous sampling test through thimble with the back-up valve top open.
The detection connector that GIS detected and uses at present generally is thimble type connector, can appear following two kinds of situations in the installation:
firstly, need the staff to debug thimble length repeatedly, thimble length can not lead to the intraformational check valve of equipment under test's derivation to be unable to be opened, then need to connect the length of adjusting the thimble after dismantling, will connect again and equipment under test to be connected, operates repeatedly until thimble length is suitable, the very big reduction work efficiency of this kind of mode of operation.
Secondly, if the thimble is too long during the length adjustment process of the thimble, the check valve is already opened under the condition that the joint is not completely sealed with the device to be tested, and gas leakage occurs in the condition. On one hand, gas leakage can cause the pressure of the tested equipment to drop, further cause the tested equipment to be locked or tripped, and influence the safe operation of the equipment, and on the other hand, the leaked gas can cause harm to the equipment and workers, such as SF 6 Can corrode solid organic materials and metals, leads to the shortening of the service life of equipment, can also produce toxic and harmful substances, and causes hidden danger to the personal safety of workers.
Therefore, the detection joint that present GIS detected the use generally exists the joint installation and opens the unable complete cooperation of equipment under test check valve and lead to gas leakage and the low problem of installation effectiveness, urgently needs to solve.
SUMMERY OF THE UTILITY MODEL
The application provides a gas detection connects to joint installation leads to gas leakage and the defect that the installation effectiveness is low with opening the unable complete cooperation of equipment under test check valve among the solution prior art.
The gas detection joint comprises a thimble tube and a connecting sleeve, wherein the connecting sleeve is provided with a guide through hole, and the thimble tube is in sliding fit with the connecting sleeve through the guide through hole;
one end of the connecting sleeve is provided with a first connecting port for providing closed connection with a gas leading-out port of the tested equipment; a second connecting port hermetically connected with a gas inlet of the detection equipment is arranged at one end of the needle ejector tube opposite to the first connecting port;
and an air guide channel communicated with the first connecting port and the second connecting port is arranged in the thimble tube.
Optionally, a first shoulder is disposed on an outer wall of the thimble tube, and a force applying portion is disposed to match with the first shoulder, and the force applying portion is convenient for receiving an external acting force and enables the thimble tube to move toward the first connection port under the action of the acting force.
Optionally, the outer wall of the thimble tube is further provided with a first limiting clamp spring for limiting the force application part to slip off from the first shaft shoulder.
Optionally, a second shoulder is disposed on the outer wall of the thimble tube, a step is disposed in the guide through hole of the connection sleeve, and a compression spring is sleeved outside the thimble tube, and one end of the compression spring abuts against the step, and the other end of the compression spring abuts against the second shoulder, so as to provide a restoring force for the thimble tube to tend to leave the first connection port.
Optionally, the inner wall of the connecting sleeve is provided with a second limiting clamp spring for limiting the second shoulder.
Optionally, the second connection port is a thread structure that is disposed at the thimble tube port and can be engaged with a gas introduction port of the detection device.
Optionally, the first connection port includes a transition cavity disposed on the guide through hole, and the transition cavity has an inner diameter size capable of being matched with a tip of the gas outlet of the device under test; still include the abduction step of adapter sleeve tip to and the cover are established the adapter sleeve external diameter face, and pass through the spacing connection cap of abduction step, the connection cap has the inside diameter face with the combination site complex of the gas delivery port of equipment under test.
Optionally, a second sealing ring sealed with the end of the gas outlet of the device to be tested is arranged on the inner wall of the transition cavity.
Optionally, a sealing gasket sealed with the flared step is arranged in the connecting cap.
Optionally, the outer wall of the ejector pin tube is provided with at least one first sealing ring, and the first sealing ring is used for sealing between the outer wall of the ejector pin tube and the guide through hole.
The gas detection joint comprises a thimble tube and a connecting sleeve, wherein the connecting sleeve is provided with a guide through hole, and the thimble tube is in sliding fit with the connecting sleeve through the guide through hole; one end of the connecting sleeve is provided with a first connecting port for providing closed connection with a gas leading-out port of the tested equipment; a second connecting port hermetically connected with a gas inlet of the detection equipment is arranged at one end of the needle ejector tube opposite to the first connecting port; and an air guide channel communicated with the first connecting port and the second connecting port is arranged in the thimble tube.
By adopting the scheme, the gas inlet of the detection equipment is firstly hermetically connected to the second connecting port, and then the first connecting port is hermetically connected with the gas outlet of the detected equipment. The thimble tube is in sliding fit with the connecting sleeve through the connecting sleeve guide through hole, so that in the process of connecting the first connecting port with the gas guide outlet of the tested device, the thimble tube can be firstly slid to a position far away from the first connecting port, after the first connecting port is hermetically connected with the gas guide outlet of the tested device, the thimble tube is slid into the gas guide outlet of the tested device, the check valve in the gas guide outlet of the tested device is pushed open, and the tested gas can be discharged from the tested device, enters the thimble tube gas guide channel and enters the testing device through the gas guide channel; after the gas sampling is finished, the slidable thimble tube leaves the gas guide outlet of the tested equipment to a position far away from the first connecting port, and then the connecting state of the first connecting port and the gas guide outlet of the tested equipment is removed.
Above-mentioned scheme, through the slip of thimble tube, has avoided having improved the installation effectiveness because of adjusting thimble length repeatedly and having repeated dismouting detection joint's problem, has also reached earlier sealing connection detection joint and equipment under test, and the effect that the check valve was opened to the slip thimble again has solved the problem that the joint installation leads to gas leakage with opening the unable complete cooperation of equipment under test check valve.
Drawings
Fig. 1 is a schematic structural diagram of a gas detection joint provided in an embodiment of the present application.
Fig. 2 is a cross-sectional view of fig. 1 provided in an embodiment of the present application.
FIG. 3 is a schematic view of an apical cannula provided by embodiments of the present application.
1: a connecting cap; 2: a gasket; 3: a second seal ring; 4: a first seal ring; 5: a guide through hole; 6: connecting sleeves; 7: a compression spring; 8: a compression spring nut; 9: a second limit clamp spring;
10: a first limit clamp spring; 11: a thimble tube; 12: a second connection port; 13: a force application part; 14: a first shoulder; 15: a second shoulder; 16: a step; 17: an air guide channel;
18: a first connection port; 19: step outward expansion; 20: a transition chamber; 31 ejector pin tube head
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The embodiment of the application provides a gas detection joint for connecting a device to be detected and detection equipment. Fig. 1 is a schematic structural diagram of a gas detection joint according to an embodiment of the present application.
As shown in fig. 1 to 3, a gas detection joint provided by the embodiment of the present application includes a thimble tube 11 and a connecting sleeve 6.
The connecting sleeve 6 is internally provided with a guide through hole 5, one end of the connecting sleeve is provided with a first connecting port 18, the thimble tube 11 is internally provided with an air guide channel 17, and the other end of the thimble tube is provided with a second connecting port 12.
The thimble tube 11 is placed in the guide through hole 5, so that the thimble tube 11 is connected with the connecting sleeve 6 in a sliding fit manner; the first connection port 18 realizes the sealing connection between the gas detection joint and the gas outlet of the tested equipment; the second connecting port 12 is positioned at the end opposite to the first connecting port, so that the gas detection joint is hermetically connected with a gas inlet of the detection equipment; the air guide passage 17 serves as a passage through which the gas to be measured is introduced from the device under test into the detection device.
The outer wall of the thimble tube 11 is provided with a first shaft shoulder 14, the first shaft shoulder 14 is matched with the force application part 13, and the outer wall of the thimble tube 11 is also provided with a first limiting clamp spring 10. The urging portion 13 receives an external urging force, and moves the thimble tube 11 in the direction of the first connection port 18 by the urging force.
The force applying part 13 is arranged between the first shaft shoulder 14 and the first limiting clamp spring 10, and is mainly used for receiving external acting force, such as pushing force, rotating force and the like, and driving the thimble tube 11 to move through the first shaft shoulder 14 so that the thimble tube 11 moves to the direction of the first connecting port 18. In this application, the force applying portion 13 may be a pressure spring nut 8, which is spirally connected to the connecting sleeve 6, and the pressure spring nut 8 gradually moves to a tightening state by an external force, so as to act on the first shoulder 14 to drive the thimble tube 11 to move toward the first connecting port 18. Of course, the force application portion 13 may have other configurations, and it is within the scope of the present application as long as it can receive an external force and push the thimble tube 11 toward the first connection port 18 via the first shoulder 14. The first shoulder 14 is mainly used for providing a force-bearing portion for the thimble tube 11, and receiving an external acting force transmitted by the force-bearing portion 13, so that the thimble tube 11 moves towards the first connection port 18. The first limit clamp spring 10 realizes the function of fixing the force application part 13, so that the force application part 13 cannot be detached from the first shaft shoulder 14.
The outer wall of the thimble tube 11 is further provided with a second shaft shoulder 15, a step 16 is arranged in the guide through hole 5, a compression spring 7 is arranged on the step 16, and a second limiting clamp spring 9 is arranged in the connecting sleeve 6.
The compression spring 7 is sleeved on the thimble tube 11, one end of the compression spring abuts against the step 16, the other end of the compression spring abuts against the second shaft shoulder 15, and the second shaft shoulder 15 is arranged between the compression spring 7 and the second limiting clamp spring 9. The compression spring 7 primarily provides a restoring force for the ejector pin 11 to move away from the first connection port 18. Compression spring 7 in this application can be for the truncated cone coil spring, provides more excellent shear stress and shock resistance for the detection connects, and other compression springs of course are the scope that this application will protect as long as can provide the restoring force for thimble tube. The second shoulder 15 is mainly used to provide a force-bearing portion for the thimble tube 11, and receive the restoring force transmitted by the compression spring 7, so as to move the thimble tube 11 away from the first connection port 18. The second limiting clamp spring 9 achieves the effect of limiting the maximum displacement of the second shaft shoulder 15, so that the second shaft shoulder 15 cannot slip due to the restoring force of the compression spring 7.
The second connection port 12 is a screw structure provided at the port of the thimble tube 11 and capable of engaging with a gas introduction port of the inspection apparatus.
The threaded structure realizes the threaded connection between the second connection port 12 and the detection device gas inlet, and of course, the second connection port 12 may be connected in other manners as long as it can be connected with the detection device gas inlet in a matching manner, which all fall within the protection scope of the present application.
The first connection port 18 includes a transition cavity 20, a flared step 19, and a connection cap 1.
The transition cavity 20 is arranged on the guide through hole 5 and has an inner diameter size capable of being matched with the end of the gas guide outlet of the tested device, the connection between the connector and the end of the gas guide outlet of the tested device is realized in the transition cavity 20, the second sealing ring 3 is arranged on the inner wall of the transition cavity 20, and the sealing connection between the inner wall of the transition cavity 20 and the end of the gas guide outlet of the tested device can be realized. The flared step 19 is arranged at the end part of the connecting sleeve 6, the connecting cap 1 is sleeved on the outer diameter surface of the connecting sleeve 6, the connection is limited by the flared step 19, and the sealing gasket 2 is arranged between the connecting cap 1 and the flared step 19 to realize the sealing connection between the two. The connecting cap 1 is provided with an inner diameter surface matched with the combination part of the gas leading-out port of the tested device, and the sealing connection of the joint and the combination part of the gas leading-out port of the tested device is realized. The connecting cap 1 in the application can be a connecting nut, the connecting joint and the combination position of the gas leading-out port of the tested device are connected through a threaded connection method, and the connecting cap can also be a connecting cap of other structures, such as a clamp connecting cap and a flange connecting cap, so long as the matching connection with the combination position of the gas leading-out port of the tested device can be realized, and the connecting cap belongs to the protection range of the application.
The outer wall of the thimble tube 11 is also provided with a first sealing ring 4.
The first sealing ring 4 can be at one position or multiple positions, and realizes the sealing function between the outer wall of the ejector pin tube 11 and the guide through hole 5. The first sealing ring 4 in the present application may be an O-ring, or may be other sealing rings such as a gasket, and all belong to the scope of the present application as long as the sealing function can be achieved.
The embodiment of the application provides a gas detection joint for connecting tested equipment and detection equipment, and realizing one-time connection to finish the airtight transfer of the tested gas from the tested equipment to the detection equipment. The specific operation process is as follows:
firstly, connecting a second connecting port 12 of a gas detection joint and a gas inlet of detection equipment in a closed state in a threaded manner;
secondly, checking that the pressure spring nut 8 is in a loose state;
and thirdly, aligning the first connecting port 18 with a gas guide outlet of the tested device and inserting the first connecting port into the gas guide outlet of the tested device, screwing the connecting cap 1 to tightly connect the connecting cap 1 with the combined part of the gas guide outlet of the tested device, at the moment, reliably connecting the connecting cap 1 with the self-sealing check valve of the tested device, fastening the pressure spring nut 8 to push the thimble tube 11 to drive the thimble head 31 (provided with a hole communicated with the gas guide channel 17 of the thimble tube) to jack the device check valve, wherein the thimble head 31 can be conical, the conical surface is provided with a gas guide hole, and gas flow is not blocked in the process of jacking the device check valve. The end of the SF6 gas guide outlet of the tested equipment enters the transition cavity 20 and is in closed connection with the inner wall of the transition cavity 20;
fourthly, rotating the pressure spring nut 8 to a screwing state to enable the thimble tube 11 to move towards the first connecting port 18 until the thimble tube 11 enters a port of a gas guide outlet of the tested device, ejecting an internal check valve, and stopping rotating the pressure spring nut 8, wherein in the state, the tested gas can flow out of the tested device, and all the gas without leakage enters the thimble tube gas guide channel 17 and enters the testing device through the gas guide channel 17;
fifthly, after the sampling amount meets the requirement, rotating the pressure spring nut 8 to the unscrewed state, and under the reset action of the spiral spring 7, moving the thimble tube 11 to the far direction relative to the first connection port 18 until the thimble tube 11 moves out of the port of the gas guide outlet of the tested device, and then re-closing the check valve in the port;
sixthly, loosening the connecting cap 1 to separate the connecting cap from the combined part of the gas guide outlet of the tested equipment, namely detaching the joint from the tested equipment;
and seventhly, disconnecting the second connecting port 12 from the gas inlet of the detection equipment.
Through the seven steps, the connection and the disassembly of the gas detection joint, the detected equipment and the detection equipment in the embodiment of the application are completed, and the leakage-free transfer of the detected gas is realized.
The embodiment of the application provides a preferred gaseous detection connects, the preferred mode that the application provided gaseous detection connects, the gaseous detection that the application provided connects still includes other preferred schemes, as long as can realize the slip through thimble tube, avoid connecting the detection joint because of adjusting thimble length repeatedly and dismouting repeatedly, and reach sealing connection detection joint and equipment under test earlier, the technical effect of check valve is opened to the slip thimble again, solve the joint installation and open the unable problem that leads to gas leakage that cooperates completely of equipment under test check valve, all belong to the content that this application will protect.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A gas detection joint is characterized by comprising a thimble tube and a connecting sleeve, wherein the connecting sleeve is provided with a guide through hole, and the thimble tube is in sliding fit with the connecting sleeve through the guide through hole;
one end of the connecting sleeve is provided with a first connecting port for providing closed connection with a gas leading-out port of the tested equipment; a second connecting port hermetically connected with a gas inlet of the detection equipment is arranged at one end of the thimble tube opposite to the first connecting port;
and an air guide channel communicated with the first connecting port and the second connecting port is arranged in the thimble tube.
2. The gas detection adapter of claim 1, wherein a first shoulder is disposed on an outer wall of the thimble tube, and a force portion is disposed to match the first shoulder, the force portion being adapted to receive an external force and to move the thimble tube toward the first connection port under the action of the external force.
3. The gas detection joint of claim 2, wherein the outer wall of the thimble tube is further provided with a first limit snap spring for limiting the force application portion to slip off from the first shoulder.
4. The gas detection junction according to claim 1, wherein a second shoulder is provided on an outer wall of said thimble tube, a step is provided in said guide through-hole of said coupling sleeve, and a compression spring is received over said thimble tube and bears against said step at one end and said second shoulder at the other end to provide a restoring force to said thimble tube tending to move said thimble tube away from said first connection port.
5. The gas detection joint of claim 4, wherein the inner wall of the connecting sleeve is provided with a second limit clamp spring for limiting the second shoulder.
6. The gas detection adapter of claim 1, wherein the second connection port is a threaded structure provided at the thimble port and capable of mating with a gas inlet of a detection device.
7. The gas detection junction according to claim 1, wherein the first connection port comprises a transition cavity disposed on a guide through hole, the transition cavity having an inner diameter dimension capable of mating with a tip of a gas outlet port of the device under test; still include the abduction step of adapter sleeve tip to and the cover are established the adapter sleeve external diameter face, and pass through the spacing connection cap of abduction step, the connection cap has the inside diameter face with the combination site complex of the gas delivery port of equipment under test.
8. The gas detection joint as claimed in claim 7, wherein the inner wall of the transition chamber is provided with a second sealing ring for sealing with the end of the gas outlet of the device to be detected.
9. The gas sensing sub of claim 7, wherein a gasket is disposed within the connecting cap to seal against the flared step.
10. The gas detection junction according to claim 1, wherein said thimble outer wall is provided with at least one first sealing ring, said first sealing ring sealing between said thimble outer wall and said guide through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220023804.3U CN217605787U (en) | 2022-01-05 | 2022-01-05 | Gas detection joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220023804.3U CN217605787U (en) | 2022-01-05 | 2022-01-05 | Gas detection joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605787U true CN217605787U (en) | 2022-10-18 |
Family
ID=83561773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220023804.3U Expired - Fee Related CN217605787U (en) | 2022-01-05 | 2022-01-05 | Gas detection joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605787U (en) |
-
2022
- 2022-01-05 CN CN202220023804.3U patent/CN217605787U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202916136U (en) | Airtight sampling device | |
| CN217605787U (en) | Gas detection joint | |
| CN205103375U (en) | Online calibrating device of high -voltage switch density relay | |
| CN103216209A (en) | Pipe interior packer for detecting sealing property of oil sleeve | |
| CN202974549U (en) | Online pressure detection device | |
| CN203188963U (en) | In-pipe packer for oil drivepipe leakproofness detection | |
| CN216715380U (en) | Real-time monitoring assembly for corrugated pipe valve | |
| CN205504258U (en) | Experimental universal adapter of 220kV SF 6 circuit breaker | |
| CN210264613U (en) | High-pressure sealing device for cable passing through wellhead | |
| CN210566617U (en) | A breaking valve security check ware for on-spot on-line measuring | |
| CN214146572U (en) | Probe sealing structure for high-pressure fluid pipeline | |
| CN216050893U (en) | Multifunctional transformer oil sampling device | |
| CN212658377U (en) | Combined electrical appliance pressure sensor connecting device with one-way non-return structure | |
| CN103531941B (en) | A kind of safety-level electrical connector | |
| CN209525069U (en) | A kind of steel tube coupling thread seal system safety testing device | |
| CN104795204B (en) | Built-in nitrogen injection device of oil-immersed transformer | |
| CN111271533A (en) | Quick pressure-resistant sealing device for pagoda type water joint | |
| CN208311590U (en) | Safety protective Pull breaking ualve | |
| CN105486550A (en) | Gas pumping device and method of electric transformer | |
| CN209654731U (en) | A kind of shock resistance type prevents the only oil valve of flowline oil leak | |
| CN220454946U (en) | Oil sample remote operation device based on converter transformer and high-voltage reactor | |
| CN209309453U (en) | A kind of multi-functional only oil valve for preventing flowline oil leak | |
| CN209309550U (en) | It is a kind of promptly to stop oil valve | |
| CN106122640B (en) | SF 6 high-voltage fast plant test connector | |
| CN219453050U (en) | Leakage-proof explosion-proof intelligent micro-electric valve for gas bottle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |