CN107102258B - Density relay checking device - Google Patents
Density relay checking device Download PDFInfo
- Publication number
- CN107102258B CN107102258B CN201710253233.6A CN201710253233A CN107102258B CN 107102258 B CN107102258 B CN 107102258B CN 201710253233 A CN201710253233 A CN 201710253233A CN 107102258 B CN107102258 B CN 107102258B
- Authority
- CN
- China
- Prior art keywords
- density relay
- check
- interface
- valve
- rotating rod
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to SF 6 The technical field of equipment discloses a density relay checking device, which comprises a density relay and a checking device, wherein the density relay is provided with a valve body and a checking inflation interface connected with the valve body, and a valve core is arranged in the checking inflation interface; the checking device comprises a fixed shell, a rotating rod in threaded connection with the inner part of the fixed shell, a connecting port arranged at the end part of the rotating rod and a needle valve arranged in the connecting port, wherein the connecting port is in threaded connection with the checking inflation interface, and the needle valve is abutted to the valve core. So, be connected with check-up inflation interface through checking device, and this check device is small and exquisite light, and can rotatory dwang can control the needle valve and to the power of case is controllable, the effectual problem that can damage the case of avoiding.
Description
Technical Field
The invention relates to SF 6 Technical field of equipment especially relates to density relay checking device.
Background
The density relay is generally SF 6 (Sulfur hexafluoride) density relay for monitoring SF 6 Inside SF of equipment 6 Important equipment for gas pressure, where SF 6 The equipment adopts SF 6 Gas as arc extinctionAn insulating medium. SF is required to be frequently used in daily life 6 The density relay is checked, and the main check items are as follows: the rest of necessary work items in alarm sending, locking signal equipment acceptance and pre-test work are carried out on SF 6 The density relay performs verification to ensure the safe and stable operation of the equipment.
In the prior art, SF is checked 6 The density relay works, firstly, the check valve needs to be closed, and the SF is disconnected 6 Density relay and SF 6 The gas pipeline of the equipment is connected; then, the rain cover of the air charging port is opened, the valve core in the air charging port is propped against by the screw rod, and the screw rod is knocked by a hammer so as to gradually release the gas in the SF6 density relay pressure gauge, so that the internal pressure of the SF6 density relay is gradually reduced to an alarm and locking pressure value, an alarm and locking signal is sent out, and whether a checking signal is correctly sent out is linked with a monitoring background, so that the checking work of the SF6 density relay signal is realized. However, in the actual operation process, the force of knocking the screw rod by a hammer is not well mastered, and the gas cannot be released to the pressure value of the alarm and the locking just sent out; or more gas is discharged, so that the pressure in the SF6 density relay is reduced below the locking pressure, an alarm signal cannot be sent independently, and the working efficiency is reduced. The method of knocking the screw rod by a hammer for deflation can damage the valve core in the inflation inlet, thereby causing the air leakage of the equipment.
Disclosure of Invention
The invention aims to provide a density relay checking device, which aims to solve the problems that in the prior art, the force of a hammer striking a screw rod is not well mastered and SF can not be discharged under control 6 The amount of gas can also damage the valve spool.
The embodiment of the invention provides a density relay checking device, which comprises a density relay and a checking device, wherein the density relay is provided with a valve body and a checking inflation interface connected with the valve body, and a valve core is arranged in the checking inflation interface; the checking device comprises a fixed shell, a rotating rod connected with the inner thread of the fixed shell, a connecting port arranged at the end part of the rotating rod and a needle valve arranged in the connecting port, wherein the connecting port is connected with the checking inflation interface in a threaded manner, and the needle valve is abutted to the valve core.
Further, an adjusting cylinder is arranged between the fixed shell and the rotating rod, and the adjusting cylinder is respectively connected with the fixed shell and the rotating rod in a rotating way.
Further, a first air hole extending to the inside of the rotating rod is formed in the needle valve, a second air hole communicated with the first air hole is formed in the rotating rod, and a third air hole communicated with the second air hole is formed in the adjusting cylinder.
Further, an adapter is arranged between the connecting port and the check inflation interface, the adapter comprises a first connecting portion connected with the connecting port and a second connecting portion connected with the check inflation interface, and a through hole for the needle valve to pass through is arranged between the first connecting portion and the second connecting portion.
Further, a tapered hole is formed in the second connecting portion, and a cross-sectional area of one side, close to the first connecting portion, of the second connecting portion is larger than or equal to a cross-sectional area of one side, far away from the first connecting portion, of the second connecting portion.
Further, a sealing ring is arranged in the connecting port and/or the adapter.
Further, a rotating handle is arranged at one end of the rotating rod, which is far away from the connecting port.
Further, a cavity is formed in the valve body, a relay connector, an electrical switch connector and a valve switch opening are connected to the outer side of the valve body, the check inflation connector is communicated with the cavity through a first air passage, and the valve switch opening is communicated with the cavity through a second air passage.
Further, the valve core comprises an adjusting head, a piston rod and a communication port, wherein the adjusting head is in butt joint with the needle valve, the piston rod is connected with the adjusting head, the communication port is arranged at the end part of the piston rod, and the communication port is communicated with the first air passage.
Further, a sealing cover is sleeved at the end part of the checking and inflating interface.
Compared with the prior art, the density relay checking device provided by the embodiment of the invention is arranged on the checking inflation interface of the density relay, namely, the connecting port is sleeved on the checking inflation interface, the fixed shell is relatively fixed, the rotating rod in the fixed shell is rotated so as to ensure that the connecting port is connected with the checking inflation interface, the area is continuously increased, and the needle valve is gradually close to the valve core and is abutted against the valve core at the moment, so that the SF in the density relay is realized 6 The gas is discharged from the check inflation interface, is connected with the check inflation interface through the check device, is small and light and convenient, can rotate the rotating rod to control the force of the needle valve on the valve core, and effectively avoids the problem that the valve core can be damaged.
Drawings
FIG. 1 is a cut-away view of a density relay check apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a checking device of the density relay checking device in FIG. 1;
FIG. 3 is a top view of the verification device of FIG. 2;
FIG. 4 is a cut-away view of the verification device of FIG. 2;
fig. 5 is a schematic structural diagram of a checking device and an adapter in the density relay checking device according to the embodiment of the present invention;
FIG. 6 is a schematic view of the transfer joint of FIG. 5;
FIG. 7 is one of the cut-away views of the verification device and adapter of FIG. 5;
FIG. 8 is a second cut-away view of the verification device and adapter of FIG. 5;
fig. 9 is a cut-away view of a density relay of the density relay check apparatus of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the terms of left, right, upper, lower, etc. in the embodiments of the present invention are merely relative concepts or references to the normal use state of the product, and should not be construed as limiting. The implementation of the present invention will be described in detail below with reference to specific embodiments.
As shown in fig. 1, an embodiment of the present invention proposes a density relay check device including a density relay 1 and a check device 2, the density relay 1 having a valve body 11 and a check inflation port 12 connected to the valve body 11, the check inflation port 12 being internally provided with a valve core 13; the checking device 2 comprises a fixed shell 21, a rotating rod 22 in threaded connection with the inside of the fixed shell 21, a connecting port 23 arranged at the end part of the rotating rod 22 and a needle valve 24 arranged in the connecting port 23, wherein the connecting port 23 is in threaded connection with the checking inflation interface 12, and the needle valve 24 is abutted against the valve core 13.
The checking device 2 is arranged on the checking inflation interface 12 of the density relay 1, namely, a connecting port 23 is sleeved on the checking inflation interface 12, a fixed shell 21 is relatively fixed, a rotating rod 22 in the fixed shell 21 is rotated so as to enable the connecting port 23 to be connected with the checking inflation interface 12, the area is continuously increased, and a needle valve 24 gradually approaches a valve core 13 and abuts against the valve core 13 at the moment so as to enable SF in the density relay 1 to be enabled 6 The gas is discharged from the check inflation interface 12, is connected with the check inflation interface 12 through the check device 2, and the check device 2 is small, exquisite and portable, and the rotatable rotating rod 22 can control the force of the needle valve 24 on the valve core 13 to be controllable, so that the problem that the valve core 13 can be damaged is effectively avoided.
Specifically, the density relay 1 may employ various types of SF 6 Density relay 1 or other type of gas relay, and checking device 2 is installed in checking inflation of density relay 1On the interface 12, the outer side of the check inflation interface 12 is provided with external threads, the inner wall of the connection port 23 is provided with internal threads, and the internal threads are sleeved with the external threads. The rotating rod 22 is also connected with the fixed shell 21 through threads, and the rotating rod 22 penetrating through the fixed shell 21 is rotated, so that the rotating rod 22 moves relative to the fixed shell 21 and the check inflation interface 12 until the needle valve 24 is abutted against the valve core 13, and the connecting port 23 and the check inflation interface 12 can be effectively controlled through the rotating rod 22.
Further, as shown in fig. 2 to 4, an adjustment cylinder 25 is provided between the fixed housing 21 and the rotation lever 22, and the adjustment cylinder 25 is rotatably connected to the fixed housing 21 and the rotation lever 22, respectively. Specifically, the adjusting cylinder 25 is disposed between the fixed housing 21 and the rotating lever 22, wherein the adjusting cylinder 25 can rotate relative to the rotating lever 22 along with the rotation of the fixed housing 21, and the adjusting cylinder 25 can also rotate relative to the fixed housing 21.
Further, a first air hole 241 extending into the rotary rod 22 is provided in the needle valve 24, a second air hole 242 communicating with the first air hole 241 is provided in the rotary rod 22, and a third air hole 251 communicating with the second air hole 242 is provided in the adjustment cylinder 25. Specifically, the valve core 13 is provided with an interface that is conducted with the first air hole 241, one end of the first air hole 241 is disposed in the density relay 1, the other end of the first air hole 241 is disposed in the rotating rod 22, the air in the density relay 1 can be conducted into the rotating rod 22 through the first air hole 241, the second air hole 242 and the first air hole 241 are always conducted, the adjusting cylinder 25 rotates relative to the rotating rod 22, namely, drives the third air hole 251 to rotate relative to the second air hole 242, so that whether the third air hole 251 is conducted with the second air hole 242 or not is controlled, and the speed of the discharged air can be controlled according to the conducted aperture between the third air hole 251 and the second air hole 242. Of course, the third air hole 251 may also be provided on the fixed housing 21 according to actual situations and specific requirements, and the air outlet speed is controlled along with the rotation of the rotating rod 22 relative to the fixed housing 21, which is not limited only herein.
Further, as shown in fig. 5 to 7, an adapter 3 is provided between the connection port 23 and the check inflation interface 12, the adapter 3 includes a first connection portion 31 connected to the connection port 23 and a second connection portion 32 connected to the check inflation interface 12, and a through hole 33 through which the needle 24 passes is provided between the first connection portion 31 and the second connection portion 32. Since the density relay 1 has various types, the check inflation interface 12 has different sizes, and the adapter 3 is provided between the connection port 23 and the check inflation interface 12 in order to enable the check inflation interface 12 to satisfy various different sizes in the check device 2. The first connecting part 31 is connected with the connecting port 23, and external threads are arranged on the outer side of the first connecting part 31 and matched with internal threads in the connecting block; the second connecting part 32 is connected with the check inflation interface 12, and the inner side of the first connecting part 31 is provided with internal threads which are matched with external threads of the check inflation interface 12; the needle 24 extends through the through hole 33 to the inside of the second connecting portion 32 and abuts against the spool 13. The adapter 3 has a simple structure, and the size of the second connecting part 32 is changed to match with the check inflation interfaces 12 with various different specifications and sizes, so that the check device 2 can be suitable for the density relays 1 with various models.
Further, as shown in fig. 8, the inside of the second connection portion 32 is provided with a tapered hole, and the cross-sectional area of the side of the second connection portion 32 close to the first connection portion 31 is greater than or equal to the cross-sectional area of the side of the second connection portion 32 away from the first connection portion 31. Specifically, the internal thread of the second connecting portion 32 is matched with the external thread of the check inflation interface 12, and the internal hole of the second connecting portion 32 is a tapered hole, that is, the check inflation interface 12 is larger in size and is in threaded connection with one side of the second connecting portion 32 away from the first connecting portion 31; the check inflation interface 12 is threaded on a side of the second connection portion 32 adjacent to the first connection portion 31 when the size is smaller. Therefore, the connection between the density relay 1 and the checking device 2 can adapt to checking inflation interfaces 12 of various different sizes without replacing the adapter 3.
Further, as shown in fig. 3, a seal ring 4 is provided inside the connection port 23 and/or inside the adapter 3. Specifically, when the adapter 3 is connected with the check inflation interface 12, a sealing ring 4 is arranged inside the adapter 3 or the sealing rings 4 are arranged inside the connection port 23 and inside the adapter 3; when the check inflation port 12 is directly connected to the connection port 23, the seal rings 4 are provided in the connection port 23. The sealing ring 4 can effectively prevent air pollution caused by gas leakage, and can conveniently control the air outlet speed by controlling the regulating cylinder 25.
Further, the end of the rotation lever 22 away from the connection port 23 is provided with a rotation handle 26. The rotation of the rotating rod 22 is controlled by the rotating handle 26, so that the length of the rotating rod 22 is prolonged, the rotating rod 22 is convenient to clamp, and an anti-skid pattern is arranged on the outer side of the rotating handle 26.
Further, as shown in fig. 1 and 9, the inside of the valve body 11 is provided with a cavity 14, and the outside of the valve body 11 is connected with a relay interface 15, an electrical switch interface 17 and a valve switch opening 16, and the check inflation interface 12 is communicated with the cavity 14 through a first air passage 121, and the valve switch opening 16 is communicated with the cavity 14 through a second air passage 161. Specifically, the valve body 11 is filled with SF 6 The gas or other gases, the lower end surface of the valve body 11 is provided with a relay interface 15, the relay interface 15 is used for being connected with a relay (not shown), the right side wall of the valve body 11 is provided with an electrical switch interface 17, the electrical switch interface 17 is used for being connected with an electrical switch (not shown), the left side wall of the valve body 11 is provided with a check inflation interface 12, and the check inflation interface 12 is used for inflation or deflation during check; the upper end face of the valve body 11 is provided with a valve switch opening 16, a cavity 14 is arranged in the valve body 11, and a relay interface 15, an electrical switch interface 17, a check inflation interface 12 and the valve switch opening 16 are communicated through the cavity 14. The check inflation interface 12 has a passage 122 disposed therein, and the valve core 13 is disposed in the passage 122 for blocking the passage 122 to prevent gas in the cavity 14 from escaping.
Further, the valve body 13 includes an adjustment head 131 that abuts against the needle 24, a piston rod 132 that connects the adjustment head 131, and a communication port 133 that is provided at an end portion of the piston rod 132, and the communication port 133 communicates with the first air passage 121. Specifically, the adjusting head 131 is disposed on a side of the valve core 13, which is close to the needle 24, and is used for matching with the needle 24, wherein an abutting interface 1331 is disposed in the adjusting head 131, and the needle 24 abuts against the inside of the abutting interface 1331 to limit the movement of the needle 24, and no abrasion is caused to the valve core 13. The piston rod 132 is disposed in the passage 122 inside the check inflation port 12, and can seal the passage 122, so that gas can be discharged from the cavity 14 only when the communication port 133 and the first air passage 121 are abutted against each other. At least two sealing rings 1321 are sleeved on the piston rod 132, and a double sealing technology is adopted to ensure the sealing of the whole system and ensure the reliable operation.
Preferably, the relay interface 15 is connected with the cavity 14 through the third air passage 151, the electrical switch interface 17 is connected with the cavity 14 through the fourth air passage 171, and both the third air passage 151 and the fourth air passage 171 can be controlled to be turned on or not. A check valve 162 is arranged between the electrical switch interface 17 and the valve body 11, and a check ring 18 for blocking the valve core 13 from moving out of the passage 122 is arranged on the side of the passage 122 inside the check charging interface 12 away from the valve switch opening 16.
Further, as shown in fig. 9, the end of the check air charging port 12 is sleeved with a sealing cover 19. The inside of sealed lid 19 is provided with the internal thread and cooperatees with the outside external screw thread of check-up inflation interface 12, combines sealed lid 19 and a plurality of sealing washer 1321 to seal up check-up inflation interface 12, guarantees reliable sealing, is in normal working running state, can effectually avoid the gas to leak outward, when needs check-up or aerify, take off sealed lid 19 can.
In the normal operation state, the side of the valve core 13 away from the valve switch opening 16 is flush with the retainer ring 18, and at this time, the communication opening 133 and the first air passage 121 are not conducted, i.e., the air passage for switching the intake air is communicated with the gas density relay 1 and the check valve 162 communicated with the fourth air passage 171.
When checking or replacing the gas density relay 1, only the sealing cover 19 is unscrewed first, the valve opening 16 is adjusted by a screwdriver so that the third air passage 151 is not communicated with the density relay 1, and the check valve 162 communicated with the fourth air passage 171 is not communicated, namely, the inside of the cavity 14 is in a blocking state, and the gas in the inside of the density relay 1 is blocked from the cavity 14. The checking device 2 is then connected to the density relay 1 in the state of fig. 1, in which case the connection port 23 or the adapter 3 is screwed to the checking inflation interface 12And the rotating handle 26 is rotated to enable the rotating rod 22 to rotate relative to the fixed shell 21, namely the needle valve 24 is driven to move towards the valve core 13 until the needle valve 24 pushes the valve core 13 to move forwards to be abutted against the first air passage 121, and at the moment, gas can be led out and the speed of air outlet is controlled by controlling the regulating cylinder 25. After checking or replacing the gas density relay 1, the rotary handle 26 is screwed in the opposite direction, so that the side, away from the first channel 122, of the valve core 13 is flush with the retainer ring 18, the checking device 2 is taken down, and then the sealing cover 19 is screwed on and screwed down, so that sealing is ensured. In the whole process of checking or replacing the density relay 1, the SF6 gas density relay 1 or the joint seat does not need to be detached. Effectively avoid the bad grasp of the force of knocking the valve core 13 by a hammer and the inability to control the SF emission 6 The valve core 13 is damaged by the gas, so that convenience is brought to the operation of electric power overhaulers, and the safe use of SF6 electrical equipment is ensured.
In order to ensure the sealing performance of the device, a groove is further formed in the relay interface 15 of the device, and a 1 sealing element 152 is arranged on the groove, wherein the 1 sealing element 152 ensures the sealing between the relay interface 15 and the SF6 gas density relay 1, and the purpose is to increase the plane sealing, ensure the sealing of the whole device and ensure the reliable operation; an internal recess may also be provided at the electrical switch interface 17 and a seal 172 may also be provided on the recess to ensure sealing of the entire device and reliable operation.
The above embodiments are merely specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about various equivalent modifications, substitutions and improvements within the technical scope of the present invention, and these modifications, substitutions and improvements are intended to be covered by the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. Density relay checking device, including density relay and checking device, its characterized in that:
the density relay is provided with a valve body and a check inflation interface connected with the valve body, and a valve core is arranged in the check inflation interface;
the checking device comprises a fixed shell, a rotating rod connected with the inner thread of the fixed shell, a connecting port arranged at the end part of the rotating rod and a needle valve arranged in the connecting port, wherein the connecting port is connected with the checking inflation interface in a threaded manner, and the needle valve is abutted to the valve core.
2. The density relay check apparatus of claim 1, wherein: an adjusting cylinder is arranged between the fixed shell and the rotating rod and is respectively connected with the fixed shell and the rotating rod in a rotating way.
3. The density relay check apparatus of claim 2, wherein: the needle valve is characterized in that a first air hole extending to the inside of the rotating rod is formed in the needle valve, a second air hole communicated with the first air hole is formed in the rotating rod, and a third air hole communicated with the second air hole is formed in the adjusting cylinder.
4. The density relay check apparatus of claim 1, wherein: the connector with check-up is provided with the adapter between the interface that aerifys, the adapter include with the first connecting portion that the connector is connected and with the check-up is aerifyd the second connecting portion that the interface is connected, first connecting portion with be provided with between the second connecting portion and supply the through-hole that the needle valve passed.
5. The density relay check apparatus of claim 4, wherein: the inside of second connecting portion is provided with the bell mouth, and the cross-sectional area of one side that the second connecting portion is close to first connecting portion is greater than or equal to the cross-sectional area of one side that the second connecting portion kept away from first connecting portion.
6. The density relay check apparatus of claim 4, wherein: and a sealing ring is arranged in the connecting port and/or the adapter.
7. The density relay check apparatus of claim 1, wherein: one end of the rotating rod, which is far away from the connecting port, is provided with a rotating handle.
8. The density relay check apparatus of claim 1, wherein: the inside of valve body is provided with the cavity, just the outside of valve body is connected with relay interface, electrical switch interface and valve switch mouth, check-up inflation interface through first air vent with the cavity is linked together, the valve switch mouth through the second air vent with the cavity is linked together.
9. The density relay check apparatus of claim 8, wherein: the valve core comprises an adjusting head, a piston rod and a communication port, wherein the adjusting head is in butt joint with the needle valve, the piston rod is connected with the adjusting head, the communication port is arranged at the end part of the piston rod, and the communication port is communicated with the first air passage.
10. The density relay check apparatus of claim 1, wherein: the end part of the checking and inflating interface is sleeved with a sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710253233.6A CN107102258B (en) | 2017-04-18 | 2017-04-18 | Density relay checking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710253233.6A CN107102258B (en) | 2017-04-18 | 2017-04-18 | Density relay checking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107102258A CN107102258A (en) | 2017-08-29 |
| CN107102258B true CN107102258B (en) | 2023-08-15 |
Family
ID=59656737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710253233.6A Active CN107102258B (en) | 2017-04-18 | 2017-04-18 | Density relay checking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107102258B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637258B (en) * | 2020-06-01 | 2021-12-14 | 中国南方电网有限责任公司超高压输电公司大理局 | Portable needle type exhaust joint and sulfur hexafluoride density relay checking method |
| CN114705358B (en) * | 2022-03-02 | 2023-12-01 | 贵州电网有限责任公司 | Auxiliary verification device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2870137Y (en) * | 2005-10-25 | 2007-02-14 | 苏丽芳 | Contact base for checking gas density relay |
| CN202049901U (en) * | 2011-02-21 | 2011-11-23 | 中国石油化工集团公司 | Disassembly-free check joint of density relay |
| WO2013139421A1 (en) * | 2012-03-20 | 2013-09-26 | Rwe Deutschland Ag | Method for testing gas-insulated electrical high-voltage equipment, particularly for testing an sf6-filled high-voltage circuit breaker, and circuit arrangement comprising at least one electrical high-voltage device with an insulating gas filling |
| CN104747759A (en) * | 2015-02-05 | 2015-07-01 | 上海上芃电气有限公司 | Assembly valve facilitating verification of sulfur hexafluoride gas density relay |
| CN206638786U (en) * | 2017-04-18 | 2017-11-14 | 国网河北省电力公司衡水供电分公司 | Density monitor capacity checking device |
-
2017
- 2017-04-18 CN CN201710253233.6A patent/CN107102258B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2870137Y (en) * | 2005-10-25 | 2007-02-14 | 苏丽芳 | Contact base for checking gas density relay |
| CN202049901U (en) * | 2011-02-21 | 2011-11-23 | 中国石油化工集团公司 | Disassembly-free check joint of density relay |
| WO2013139421A1 (en) * | 2012-03-20 | 2013-09-26 | Rwe Deutschland Ag | Method for testing gas-insulated electrical high-voltage equipment, particularly for testing an sf6-filled high-voltage circuit breaker, and circuit arrangement comprising at least one electrical high-voltage device with an insulating gas filling |
| CN104747759A (en) * | 2015-02-05 | 2015-07-01 | 上海上芃电气有限公司 | Assembly valve facilitating verification of sulfur hexafluoride gas density relay |
| CN206638786U (en) * | 2017-04-18 | 2017-11-14 | 国网河北省电力公司衡水供电分公司 | Density monitor capacity checking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107102258A (en) | 2017-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107102258B (en) | Density relay checking device | |
| CN102658555B (en) | Gas drive type underwater disconnecting device | |
| CN205646757U (en) | Cable intermediate head protection device | |
| CN110685738A (en) | Pressure relief device for monitoring pressure of paste filling pipeline and control method | |
| CN110936315A (en) | High-pressure gas controllable strong wrench | |
| CN107327583A (en) | Gas charge valve | |
| CN206638786U (en) | Density monitor capacity checking device | |
| CN110715165B (en) | Open from pressure release formula gas bomb device | |
| CN204553903U (en) | A kind of compressed natural gas bottle valve for cars | |
| CN210603741U (en) | Oil field leakage detection device with alarm function | |
| CN108980453B (en) | Intelligent filling gun for coded lock valve | |
| CN105742779B (en) | A kind of flexible inflatable antenna floating body aeration control device | |
| CN211082885U (en) | Non-repetitive use valve of steel cylinder | |
| CN213018899U (en) | Low-pressure large-drift-diameter quick inflation connector | |
| CN209688191U (en) | Mechanical water cut-off self-closing damper valve | |
| CN202371746U (en) | Quick open air door | |
| CN101265790B (en) | Hydraulic control security valve | |
| CN208886036U (en) | A kind of valve of sulfur hexafluoride gas density relay on-line testing | |
| CN206816222U (en) | A kind of valve leakage out of steam system controller | |
| CN202349329U (en) | Dustproof plug of inflation valve | |
| CN210290882U (en) | Medical gas safety valve | |
| CN217653340U (en) | Device for reducing opening speed of pneumatic valve | |
| CN113944876B (en) | Multi-gas cylinder gas supply system | |
| CN219282574U (en) | Stop valve for power station | |
| CN219673963U (en) | Tyre inflation switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 053000 No. 185 East Renmin Road, Hebei, Hengshui Applicant after: HENGSHUI POWER SUPPLY BRANCH OF STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant after: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Address before: 053000 No. 185 East Renmin Road, Hebei, Hengshui Applicant before: STATE GRID HEBEI ELECTRIC POWER COMPANY HENGSHUI POWER SUPPLY BRANCH Applicant before: STATE GRID HEBEI ELECTRIC POWER Co. Applicant before: State Grid Corporation of China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |