CN210566618U - Circuit breaker and locking valve thereon - Google Patents
Circuit breaker and locking valve thereon Download PDFInfo
- Publication number
- CN210566618U CN210566618U CN201921028445.5U CN201921028445U CN210566618U CN 210566618 U CN210566618 U CN 210566618U CN 201921028445 U CN201921028445 U CN 201921028445U CN 210566618 U CN210566618 U CN 210566618U
- Authority
- CN
- China
- Prior art keywords
- valve
- sliding shaft
- circuit breaker
- opening
- shaft
- 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
- 238000005192 partition Methods 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009471 action Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model discloses a locking valve for on circuit breaker, include: the valve body is internally provided with a valve cavity, and both ends of the valve body are respectively provided with an air vent and an opening which are communicated with the valve cavity and are coaxially arranged; the piston is arranged in the valve cavity and can slide in the valve cavity; one end of the valve rod is connected with the piston, and the other end of the valve rod penetrates through the opening and extends out of the valve body to form a limiting part; the pressure spring is sleeved on the valve rod and used for providing a tendency force for the piston to slide towards the direction of the air vent. The position of the valve rod can be adjusted according to the air pressure at the vent, so that the length of the valve rod extending out of the valve body is different, the air pressure of the switch cabinet is detected, and the valve rod extending out of the valve body is in a low-air-pressure state only when the length of the valve rod is smaller than a preset value. The application also discloses a circuit breaker comprising the latching valve.
Description
Technical Field
The utility model relates to a circuit breaker technical field, in particular to circuit breaker and last lock valve thereof.
Background
The high-voltage circuit breaker (or called high-voltage switch) not only can cut off or close the no-load current and load current in the high-voltage circuit, but also can cut off the overload current and short-circuit current by the action of the relay protection device when the system has a fault, and has quite perfect arc extinguishing structure and enough current breaking capacity, and can be divided into: oil circuit breakers (multiple oil circuit breakers, less oil circuit breakers), sulfur hexafluoride circuit breakers (SF 6 circuit breakers), compressed air circuit breakers, vacuum circuit breakers, etc.
In order to improve the arc extinguishing capability of the insulating effect and the arc extinguishing chamber, the existing high-voltage circuit breaker can introduce inert gas into the switch cabinet, but relatively, the air pressure in the switch cabinet can be reduced due to the damage, aging and other problems of equipment in the using process, so that the arc extinguishing capability of the insulating effect and the arc extinguishing chamber is reduced, and the reduction of the insulating effect can bring potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a locking valve for on circuit breaker can detect whether cubical switchboard internal gas pressure is less than the safe value to make corresponding action.
The above technical purpose of the present invention is realized by the following technical solution:
a lock valve for a circuit breaker, comprising:
the valve body is internally provided with a valve cavity, and both ends of the valve body are respectively provided with an air vent and an opening which are communicated with the valve cavity and are coaxially arranged;
the piston is arranged in the valve cavity and can slide in the valve cavity;
one end of the valve rod is connected with the piston, and the other end of the valve rod penetrates through the opening and extends out of the valve body to form a limiting part;
the pressure spring is sleeved on the valve rod and used for providing a tendency force for the piston to slide towards the direction of the air vent.
So set up, the position of the atmospheric pressure regulating valve rod of piston can be according to the vent department makes the valve rod stretch out the external length difference of valve to this realization detects the atmospheric pressure of cubical switchboard, as long as when stretching out the external valve rod length of valve and being less than the default, the expression promptly is in the low pressure state.
More preferably: the valve body comprises a main body and an end cover welded with the main body, and the vent hole is formed in the end cover.
So set up, the realization can be installed the piston in the valve chamber to can ensure after the welding has good sealed effect.
More preferably: the diameter of opening is greater than the external diameter of spring, opening part threaded connection has a nut, be provided with the through-hole that can supply the valve rod to pass on the nut, the both ends of pressure spring respectively with nut and piston butt.
So set up, make the installation of spring very convenient.
More preferably: the main body is at least provided with an annular groove outside, and a sealing ring is arranged in the annular groove.
So set up, can increase and guarantee its leakproofness effect after the lock valve is installed on the circuit breaker.
More preferably: the main body is provided with an annular baffle protruding from the side wall of one end of the opening.
So set up, the mounted position of location lock valve to this makes predetermined valve rod extension length can accord with operation requirement.
The second purpose of the utility model is to provide a circuit breaker, it can lock the separating brake mechanism when the cubical switchboard internal gas pressure is less than the safe value, makes equipment keep at the separating brake state.
The above technical purpose of the present invention is realized by the following technical solution:
a circuit breaker comprises a switch cabinet, an operation cabinet and a partition plate arranged between the switch cabinet and the operation cabinet, wherein a mounting hole penetrates through the partition plate, and the locking valve is inserted into the mounting hole;
the operating cabinet comprises an operating mechanism and a sliding shaft connected to the partition plate in a sliding manner, and the sliding shaft slides on the partition plate to form two states of locking and unlocking; the operating mechanism comprises a brake-separating half shaft and a brake-separating shifting piece connected with the brake-separating half shaft, and the brake-separating shifting piece is locked when the sliding shaft is in a locking state;
a compression spring which provides a force tending to move towards the brake separating poking sheet towards the sliding shaft is arranged between the sliding shaft and the partition plate, and a bayonet which can be clamped by the limiting part and limits the sliding shaft to an unlocking state is arranged on the sliding shaft.
According to the arrangement, after the locking valve is arranged on the mounting hole, when the air pressure is within a safe value, the valve rod of the locking valve is clamped into the clamping opening of the sliding shaft, and the sliding shaft is limited in an unlocking state; when the air pressure in the switch cabinet is lower than a safety value, the valve rod of the locking valve is separated from the bayonet, the sliding rod moves towards the opening shifting piece under the action of the compression spring to enter a locking state, and is finally clamped on a rotating track of the opening shifting piece to lock the opening shifting piece at an initial position, and at the moment, the opening half shaft cannot be rotated, so that the breaker is kept in an opening state.
More preferably: the operating cabinet is provided with a state display disc, a pointer on the state display disc is controlled by an indicating shaft to rotate, a torsion plate is arranged on the indicating shaft, one end of the torsion plate is controlled by a torsion spring to rotate towards the direction of the partition plate, and when the sliding shaft is in an unlocking state, the end part, far away from the brake separating poking piece, of the sliding shaft is located below the torsion plate to limit the rotation of the sliding shaft.
So set up, when the slide shaft is in the unblock state, turn round the board and be blocked unable removal, and when the slide shaft was in the locking state, the slide shaft removed from the below of turning round the board and shifted, turned round the board at this moment and moved under the torsional spring effect to drive the pointer and rotate to the low pressure display area, so, show the state of slide shaft through the state display panel.
More preferably: the partition board is provided with a mounting plate for inserting the sliding shaft, the sliding shaft is in threaded connection with a limiting bolt, and two ends of the compression spring are respectively abutted to the mounting plate and the limiting bolt.
So set up, realize compression spring's installation and normal use.
More preferably: the locking valve and the mounting hole are welded and connected on one side of the switch cabinet.
With this arrangement, the lock valve can be fixed better, and the sealing property between the lock valve and the partition plate can be improved.
To sum up, the utility model discloses following beneficial effect has:
1. the air pressure in the switch cabinet of the circuit breaker can be automatically detected, and corresponding actions can be performed;
2. when the breaker is detected to be in a low-pressure state, the breaker can be automatically locked in a brake-off state;
3. can show above-mentioned action through visual mode, carry out troubleshooting when being convenient for maintain.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic view of a nut according to an embodiment;
FIG. 3 is an overall outline view of the first embodiment;
FIG. 4 is a view showing the configuration of the second embodiment;
FIG. 5 is a schematic view showing the structure of a partition and a status display panel in the second embodiment
FIG. 6 is a schematic structural diagram of the inside of the operation cabinet in the second embodiment;
FIG. 7 is an enlarged view of portion A of FIG. 6;
FIG. 8 is a schematic structural view of a slide shaft according to a second embodiment;
FIG. 9 is a second schematic structural view of the inside of the operation cabinet in the second embodiment;
fig. 10 is a schematic structural view of the inside of the operation cabinet in the second embodiment, showing the structure in the state where the slide shaft is unlocked.
In the figure, 100, valve body; 110. a main body; 111. an annular groove; 112. a seal ring; 113. an annular baffle; 120. an end cap; 130. a valve cavity; 140. a vent; 150. an opening; 200. a piston; 210. a valve stem; 211. a limiting part; 220. a pressure spring; 300. a nut; 310. a through hole; 400. a switch cabinet; 410. an operating mechanism; 411. a brake-separating half shaft; 412. a brake separating and shifting sheet; 420. a slide shaft; 421. buckling; 422. a compression spring; 423. a limit bolt; 500. an operation cabinet; 600. a partition plate; 610. mounting holes; 700. a status display panel; 710. an indicator shaft; 720. inserting plates; 730. twisting a plate; 740. a torsion spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Example 1:
the utility model provides a lock valve for circuit breaker, as shown in fig. 1 and 3, includes valve body 100, piston 200, valve rod 210 and pressure spring 220, is equipped with valve pocket 130 in the valve body 100, and piston 200 slides and connects in valve pocket 130, and valve rod 210 one end is connected with piston 200, and the other end stretches out valve body 100 and forms spacing portion 211, and pressure spring 220 locates in the valve pocket 130 and overlaps on the valve rod 210.
The valve body 100 includes a main body 110 and an end cap 120, the end cap 120 is fixed to the main body 110 by a spring plate, and the valve chamber 130 is formed by connecting the main body 110 and the end cap 120.
A vent port 140 is provided in the end cap 120, the vent port 140 communicating with the valve chamber 130. An opening 150 is formed in the body 110, the opening 150 is communicated with the valve cavity 130, and the vent 140 and the opening 150 are coaxially disposed.
The diameter of the opening 150 is larger than the outer diameter of the spring, a nut 300 is connected to the opening 150 through a thread, with reference to fig. 2, a through hole 310 through which the valve rod 210 can pass is formed in the nut 300, and two ends of the pressure spring 220 are respectively abutted against the nut 300 and the piston 200, so as to provide a force tending to slide towards the direction of the vent 140 to the piston 200.
Referring to fig. 1 and 3, the main body 110 is provided with at least one annular groove 111, and a sealing ring 112 is disposed in the annular groove 111.
An annular baffle 113 is formed on a side wall of the body 110 at one end of the opening 150 in a protruding manner.
The working principle is as follows:
the piston 200 can adjust the position of the valve rod 210 according to the air pressure at the air vent 140, when the air pressure meets the requirement, the piston 200 can compress the compression spring 220 to move towards the main body 110, and when the air pressure is reduced, the piston 200 can move towards the end cover 120 under the action of the compression spring 220, so that the length of the valve rod 210 extending out of the valve body 100 is shortened, the air pressure of the switch cabinet 400 is detected, and the low-air-pressure state is indicated as long as the length of the valve rod 210 extending out of the valve body 100 is smaller than a preset value.
Example 2:
a circuit breaker, as shown in FIG. 4, includes a switch cabinet 400, an operation cabinet 500, and a partition 600, the partition 600 being disposed between the switch cabinet 400 and the operation cabinet 500 to partition the switch cabinet 400 and the operation cabinet 500.
As shown in fig. 5, a mounting hole 610 is formed through the partition 600, the lock valve of embodiment 1 is inserted into the mounting hole 610, and the lock valve is hermetically connected to the partition 600 by welding, wherein the welding point is that the partition 600 is located at one side of the switch cabinet 400, and the annular baffle 113 on the lock valve abuts against the partition 600 at the side of the operation cabinet 500.
As shown in fig. 6 and 7, an operating mechanism 410 and a sliding shaft 420 are disposed in the operating cabinet 500, the operating mechanism 410 is provided with a brake-separating half shaft 411 and a brake-separating pull-tab 412, and the brake-separating pull-tab 412 is connected with the brake-separating half shaft 411 and is used for controlling the rotation of the brake-separating half shaft 411 (the operation principle of the brake-separating half shaft 411 belongs to the prior art, and therefore, the specific operation principle of the brake-separating half shaft 411 is not explained in this embodiment).
Three mounting plates are mounted on the partition 600, the three mounting plates are located near the position of the locking valve, sliding holes are formed in the mounting plates, and the sliding shaft 420 is connected in the sliding holes in a sliding mode. When the opening paddle 412 is not affected by an external force, the sliding shaft 420 is tangent to the opening paddle 412 in the extending direction of the axis line, that is, when the sliding shaft 420 slides towards the opening paddle 412, the opening paddle 412 can be locked and cannot rotate, and at this time, the sliding shaft 420 is in a locked state.
The sliding shaft 420 and the valve rod 210 of the lock valve are located on the same plane. Referring to fig. 8, a bayonet is provided on the sliding shaft 420, and the limiting portion 211 on the valve stem 210 can be snapped in and limit the sliding shaft 420 to the unlocked state.
The end part of the sliding shaft 420 is in threaded connection with a limiting bolt 423, the limiting bolt 423 is perpendicular to the sliding shaft 420, a compression spring 422 is sleeved on the sliding shaft 420, one end of the compression spring 422 is abutted against the limiting bolt 423, and the other end of the compression spring 422 is abutted against a mounting plate close to the limiting bolt 423.
As shown in fig. 5, the operation cabinet 500 is provided with a status display panel 700, and the status display panel 700 is mounted on an outer sidewall of the operation cabinet 500, wherein a pointer on the status display panel 700 is connected with an indication shaft 710, and the indication shaft 710 penetrates through the sidewall of the operation cabinet 500 and is inserted into the operation cabinet 500 and is connected with a torsion plate 730.
An insert plate 720 is provided on the partition 600, and the indication shaft 710 is provided through the insert plate 720 to maintain stability thereof. A torsion spring 740 is installed between the insertion plate 720 and the torsion plate 730, the torsion spring 740 is sleeved on the indication shaft 710, and under the action of the torsion spring 740, one end of the torsion plate 730 tends to rotate towards the partition plate 600.
When the sliding shaft 420 is in the unlocked state, the end of the sliding shaft 420 far away from the opening pulling piece 412 is located below the torsion plate 730 to limit the rotation thereof.
The working principle is as follows:
after the locking valve is installed on the installation hole 610, when the air pressure is within a safe value, the valve rod 210 of the locking valve is clamped into the bayonet of the sliding shaft 420, so that the sliding shaft 420 is limited to be in an unlocking state, at this time, the sliding shaft 420 is separated from the opening pull plate 412, the opening pull plate 412 cannot be idle, the other end of the sliding shaft 420 is located below the torsion plate 730 to limit the rotation, and at this time, the state display panel 700 displays normal.
When the air pressure in the switch cabinet 400 is lower than the safety value, the valve rod 210 of the locking valve is disengaged from the bayonet, at this time, the sliding rod moves towards the opening pull plate 412 under the action of the compression spring 422 to enter a locking state, and is finally clamped on the rotation track of the opening pull plate 412 to lock the opening pull plate at an initial position, at this time, the opening half shaft 411 cannot be rotated, so that the circuit breaker is kept in an opening state. Meanwhile, due to the movement of the sliding shaft 420, the other end of the sliding shaft can be moved out from the lower side of the torsion plate 730, at this time, the torsion plate 730 moves under the action of the torsion spring 740, so as to drive the pointer to rotate to the low-voltage display area, and thus, the state of the sliding shaft 420 is displayed through the state display panel 700.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the present invention.
Claims (9)
1. A locking valve for a circuit breaker, comprising:
the valve comprises a valve body (100), a valve cavity (130) is arranged in the valve body (100), and two ends of the valve body (100) are respectively provided with a vent (140) and an opening (150) which are communicated with the valve cavity (130) and are coaxially arranged;
the piston (200) is arranged in the valve cavity (130) and can slide in the valve cavity (130);
one end of the valve rod (210) is connected with the piston (200), and the other end of the valve rod penetrates through the opening (150) and extends out of the valve body (100) to form a limiting part (211);
and the pressure spring (220) is sleeved on the valve rod (210) and is used for providing a tendency force for the piston (200) to slide towards the direction of the air vent (140).
2. The locking valve for circuit breaker as claimed in claim 1, wherein: the valve body (100) comprises a main body (110) and an end cover (120) welded with the main body (110), and the air vent (140) is arranged on the end cover (120).
3. The locking valve for circuit breaker as claimed in claim 1, wherein: the diameter of opening (150) is greater than the external diameter of spring, opening (150) department threaded connection has a nut (300), be provided with through-hole (310) that can supply valve rod (210) to pass on nut (300), the both ends of pressure spring (220) respectively with nut (300) and piston (200) butt.
4. The locking valve for circuit breaker as claimed in claim 2, wherein: the main body (110) is externally provided with at least one annular groove (111), and a sealing ring (112) is arranged in the annular groove (111).
5. The locking valve for circuit breaker as claimed in claim 2, wherein: an annular baffle (113) is formed on the side wall of one end of the main body (110) positioned at the opening (150) in a protruding mode.
6. The utility model provides a circuit breaker, includes cubical switchboard (400), operation cabinet (500) and locates baffle (600) between cubical switchboard (400) and operation cabinet (500), characterized by: a mounting hole (610) is arranged on the partition plate (600) in a penetrating way, and the locking valve of any one of the claims 1-5 is inserted into the mounting hole (610);
the operating cabinet (500) comprises an operating mechanism (410) and a sliding shaft (420) connected to the partition plate (600) in a sliding manner, wherein the sliding shaft (420) slides on the partition plate (600) to form two states of locking and unlocking; the operating mechanism (410) comprises a brake separating half shaft (411) and a brake separating shifting piece (412) connected with the brake separating half shaft (411), and the brake separating shifting piece (412) is locked when the sliding shaft (420) is in a locking state;
a compression spring (422) which provides a force tending to move towards the brake separating shifting piece (412) to the sliding shaft (420) is arranged between the sliding shaft (420) and the partition plate (600), and a bayonet which can be clamped by the limiting part (211) and limits the sliding shaft (420) to an unlocking state is arranged on the sliding shaft (420).
7. The circuit breaker of claim 6, wherein: the operating cabinet (500) is provided with a state display disc (700), a pointer on the state display disc (700) is controlled by an indication shaft (710) to rotate, a torsion plate (730) is arranged on the indication shaft (710), one end of the torsion plate (730) is controlled by a torsion spring (740) to rotate towards the direction of the partition plate (600), and when the sliding shaft (420) is located in an unlocking state, one end part, far away from the opening shifting piece (412), of the sliding shaft (420) is located below the torsion plate (730) to limit the rotation of the sliding shaft.
8. The circuit breaker of claim 6, wherein: the partition plate (600) is provided with a mounting plate for inserting the sliding shaft (420), the sliding shaft (420) is connected with a limiting bolt (423) in a threaded mode, and two ends of the compression spring (422) are abutted to the mounting plate and the limiting bolt (423) respectively.
9. The circuit breaker of claim 6, wherein: the locking valve and the mounting hole (610) are positioned on one side of the switch cabinet (400) and are connected in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028445.5U CN210566618U (en) | 2019-07-02 | 2019-07-02 | Circuit breaker and locking valve thereon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028445.5U CN210566618U (en) | 2019-07-02 | 2019-07-02 | Circuit breaker and locking valve thereon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210566618U true CN210566618U (en) | 2020-05-19 |
Family
ID=70645389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921028445.5U Expired - Fee Related CN210566618U (en) | 2019-07-02 | 2019-07-02 | Circuit breaker and locking valve thereon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210566618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565821A (en) * | 2021-06-30 | 2021-10-29 | 郑州磨料磨具磨削研究所有限公司 | Hydraulic stop valve capable of adjusting closing pressure and hydraulic system |
-
2019
- 2019-07-02 CN CN201921028445.5U patent/CN210566618U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565821A (en) * | 2021-06-30 | 2021-10-29 | 郑州磨料磨具磨削研究所有限公司 | Hydraulic stop valve capable of adjusting closing pressure and hydraulic system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101097815A (en) | Visible open indicator | |
| CN210566618U (en) | Circuit breaker and locking valve thereon | |
| CN116154666B (en) | Upper isolation upper grounding environment-friendly gas-insulated ring main unit | |
| CN213989878U (en) | Explosion-proof structure of inflatable cabinet | |
| CN202142478U (en) | A circuit breaker auxiliary opening device | |
| CN211151318U (en) | High-voltage load switch handcart and high-voltage switch cabinet provided with same | |
| CN213402215U (en) | Explosion-proof mechanism of environment-friendly gas insulated electric cabinet | |
| CN212461517U (en) | Vertical pressure switch | |
| CN218996582U (en) | Explosion-proof knife switch | |
| CN109166770A (en) | A kind of high-tension switch cabinet inner breaker divide-shut brake coil state instruction device | |
| CN212113603U (en) | Tripping mechanism and miniature circuit breaker adopting same | |
| EP2807665B1 (en) | Lever for disconnector, and disconnector | |
| CN204497163U (en) | A kind of circuit breaker failure tripping indicating device | |
| CN210865978U (en) | Interlocking device of circuit breaker mechanism and three-station operating mechanism | |
| CN109449060B (en) | Method for monitoring high-voltage circuit breaker mechanism spring on line by using force transducer | |
| CN219497621U (en) | Double-hole operating mechanism of CGIS isolating switch | |
| CN218274418U (en) | Circuit breaker auxiliary switch actuating mechanism | |
| US10804053B2 (en) | Circuit breaker handle connection structure | |
| CN220253856U (en) | Control cabinet with good sealing performance | |
| CN112133596B (en) | Adjustable pointer type sulfur hexafluoride density relay | |
| CN220651897U (en) | Misoperation preventing device for load switch | |
| CN214797312U (en) | Indicating device for opening and closing small circuit breaker | |
| CN217008974U (en) | Switching-on and switching-off control structure of low-voltage load isolating switch | |
| CN213364977U (en) | Device for measuring switching-on and switching-off speed of C unit of ring network inflatable cabinet | |
| CN216213212U (en) | Integrated circuit breaker opening and closing device |
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: 20200519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |