CN109560497B - Auxiliary handcart position signal feedback device of movable switch cabinet - Google Patents
Auxiliary handcart position signal feedback device of movable switch cabinet Download PDFInfo
- Publication number
- CN109560497B CN109560497B CN201811633543.1A CN201811633543A CN109560497B CN 109560497 B CN109560497 B CN 109560497B CN 201811633543 A CN201811633543 A CN 201811633543A CN 109560497 B CN109560497 B CN 109560497B
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- plate
- signal feedback
- auxiliary
- switch
- feedback unit
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- 238000007664 blowing Methods 0.000 claims abstract description 29
- 238000005452 bending Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/10—Indicating electrical condition of gear; Arrangement of test sockets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Push-Button Switches (AREA)
- Trip Switchboards (AREA)
Abstract
The invention discloses a position signal feedback device of an auxiliary handcart of a movable switch cabinet, which comprises a test position signal feedback unit and a working position signal feedback unit which are fixed on the inner side wall of an auxiliary handcart room, wherein the test position signal feedback unit comprises a switch installation bent plate, an upper bent plate and a lower bent plate are arranged on the side wall of the switch installation bent plate, and a magnetic blowing switch is arranged between the upper bent plate and the lower bent plate; the bottom of the driving plate passes through a strip seam at the front end of the lower bending plate and one end of the roller unit to be hinged on the inner side of the other side wall of the lower bending plate, a trigger screw rod penetrating through the driving plate is arranged in the middle of the driving plate, the upper side wall of the trigger screw rod is adjacent to the lower horizontal side edge of the Z-shaped micro switch pressing plate, and the rear end of the upper horizontal side edge of the micro switch pressing plate is adjacent to the magnetic blowing switch; the position of the auxiliary handcart is fed back on the industrial controller through the closing/opening of the magnetic blowing switch, so that an operator can clearly identify the position of the auxiliary handcart, misoperation is avoided, and the reliability of equipment is improved.
Description
Technical Field
The invention relates to the technical field of electrical switching equipment, in particular to a position signal feedback device of an auxiliary handcart of a movable switch cabinet.
Background
The medium-voltage movable alternating-current metal-enclosed switch cabinet has the main functions of distributing and controlling electric energy and has the advantages of convenience in operation, good interchangeability, high power supply reliability and the like. In practical application, the auxiliary handcart is very important auxiliary equipment, including protection class, isolation class, measurement class, monitoring class, auxiliary class etc., specifically such as fuse handcart, arrester handcart, voltage transformer handcart, measurement handcart, ground connection handcart, isolation handcart, electricity test handcart, nuclear phase handcart etc.. In general, most functional carts can only push the auxiliary cart to the working position when the busbar is not charged. However, most auxiliary carts currently cannot know that the auxiliary carts are in working positions or test positions in use, i.e. cannot monitor the positions of the auxiliary carts. If the position monitoring is realized, the position monitoring signals can be used for forming electrical interlocking to restrict the pushing or operation of other equipment in the switch cabinet on the bus so as to avoid instant short circuit, arc burning and fire accidents caused by misoperation.
Disclosure of Invention
The invention aims to provide the position monitoring device which has a simple structure, is convenient to install, can safely and reliably monitor whether an auxiliary handcart is in a switch cabinet, is in a working position or a test position, is not influenced by auxiliary states in other switch cabinets, and realizes the electric interlocking with other switch cabinets on a bus.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The utility model provides a portable switch cabinet assists handcart position signal feedback device, it includes fixed on the auxiliary handcart room inside wall install on the same base plate the same test position signal feedback unit and the work position signal feedback unit of structure, test position signal feedback unit is close to switch cabinet door department, test position signal feedback unit includes the U type switch installation bent plate of opening towards handcart type lateral wall, the upper and lower both ends of the lateral wall of switch installation bent plate are connected with L type upper bent plate and one vertical side of the U type down bent plate of opening down respectively through the bolt, are equipped with the magnetic blow switch between upper bent plate and the down bent plate; the front end of the horizontal side wall of the lower bending plate is provided with a strip seam, the bottom of the strip-shaped driving plate passes through the strip seam and is hinged with one end of the roller unit on the inner side of the other side wall of the lower bending plate, the roller unit and the driving plate form an L shape, the roller unit is positioned in the inner cavity of the lower bending plate, the middle part of the driving plate is provided with a trigger screw rod penetrating through the driving plate, the rear part of the trigger screw rod is provided with a through hole, a metal wire at the upper part of the tension spring penetrates through the through hole and is fixed on the lower horizontal side edge of the Z-shaped micro switch pressing plate, and the bottom end of the tension spring is fixed on the upper surface of the lower bending plate; the rear end of the horizontal side edge of the upper part of the micro switch pressing plate is adjacent to the magnetic blow switch; when the auxiliary handcart advances into the switch cabinet body from the cabinet door, after the top of a signal trigger plate arranged on the auxiliary handcart is contacted with a roller unit in a test position signal feedback unit, the roller unit is lifted upwards to drive a driving plate to rotate clockwise, the top end of the side wall of a trigger screw rod is contacted with the lower horizontal side edge of a micro switch pressing plate, the micro switch pressing plate is gradually lifted, the rear end of the upper horizontal side edge of the micro switch pressing plate triggers a magnetic blowing switch to be closed, a closing signal of the magnetic blowing switch is transmitted to an industrial controller, and a signal lamp of the auxiliary handcart at a test position in the industrial controller is lightened; when the auxiliary handcart continues to push into the cabinet body, the signal trigger plate triggers a magnetic blowing switch of the working position signal feedback unit, and a signal lamp at the working position of the auxiliary handcart in the industrial controller is simultaneously turned on; when the top end of the signal trigger plate is not contacted with the roller unit, the driving plate and the micro switch pressing plate return to the original positions under the action of the tension spring, and the driving plate pushes the roller unit to return to the original positions; when the auxiliary handcart is pulled out of the cabinet body, the signal trigger plate on the auxiliary handcart sequentially triggers the magnetic blowing switches in the working position signal feedback unit and the test position signal feedback unit, the two magnetic blowing switches are sequentially disconnected, the signal lamp of the auxiliary handcart in the working position and the test position in the industrial controller is sequentially extinguished, and then an operator can clearly judge the position of the auxiliary handcart.
Preferably, an auxiliary extension signal feedback unit is arranged between the working position signal feedback unit and the test position signal feedback unit, the auxiliary extension signal feedback unit comprises a U-shaped switch installation bent plate with an opening facing to the handcart type side wall, the upper end and the lower end of the side wall of the switch installation bent plate are respectively connected with an L-shaped upper bent plate and one vertical side edge of a U-shaped lower bent plate with a downward opening through bolts, and a magnetic blowing switch is arranged between the upper bent plate and the lower bent plate; the front end of the horizontal side wall of the lower bending plate is provided with a strip slit, the strip shape passes through the strip slit from the bottom of the driving plate and is hinged on the side wall of the lower bending plate, the top of the driving plate is hinged with the top end of the driving plate of the working position signal feedback unit through a horizontally arranged driving connecting rod, a triggering screw rod penetrating through the driving plate is arranged in the middle of the driving plate, the rear part of the triggering screw rod is adjacent to the lower horizontal side edge of the Z-shaped micro switch pressing plate, and the rear end of the upper horizontal side edge of the micro switch pressing plate is adjacent to the magnetic blowing switch; when a signal trigger plate on the auxiliary handcart triggers a magnetic blow switch in the working position signal feedback unit, the magnetic blow switch in the auxiliary extension signal feedback unit is closed/opened along with the magnetic blow switch in the working position signal feedback unit under the linkage action of the driving plate, the driving connecting rod and the driven plate.
Preferably, the roller unit comprises two clamping plates and rollers connected to the bottom ends of the clamping plates through rolling shafts, and the upper parts of the clamping plates are hinged between the two side walls of the lower bending plate.
Preferably, the top of the signal trigger plate is provided with a circular arc-shaped top plate, and when the top plate of the signal trigger plate is contacted with the roller unit, the roller rolls on the top plate.
The beneficial effects of the invention are as follows:
(1) The auxiliary handcart position working position signal feedback unit and the test position signal feedback unit are arranged on the inner side wall of the auxiliary handcart room, the magnetic blowing switches are arranged in the signal feedback units, and the positions of the auxiliary handcart are fed back on the industrial controller through the closing/opening of the magnetic blowing switches, so that an operator can conveniently and clearly identify the positions of the auxiliary handcart, misoperation is avoided, and the reliability of equipment is improved;
(2) According to the invention, the signal trigger plate arranged on the auxiliary handcart is contacted with the roller unit and moves relatively to drive the driving plate and the micro switch pressing plate to act, so that the magnetic blow switch is triggered, the structural design of the signal feedback unit is exquisite, scientific and reasonable, and the identification of the position of the auxiliary handcart is realized through mechanical linkage;
(3) The auxiliary extension signal feedback unit is arranged on one side of the working position signal feedback unit, and can provide signal sources for various switch cabinet electronic monitoring protection devices such as a switch cabinet five-prevention interlocking protection device, a switch cabinet state display device, a switch cabinet comprehensive protection device and the like; when the signal node is insufficient or damaged, the signal node can be immediately put into use without replacement, and is convenient and quick; multiple paths of signals can be output in parallel, so that reliability is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the test bit signal feedback unit in FIG. 1;
FIG. 3 is a view of the use of the present invention with the auxiliary cart in the test position;
FIG. 4 is a view of the present invention in use with the auxiliary cart in an operative position;
In the figure: 1. the device comprises a signal trigger plate, 2, a roller unit, 3, a driving plate, 4, a driving connecting rod, 5, a secondary driving plate, 6, a micro switch pressing plate, 7, a tension spring, 8, a magnetic blow switch, 9, an upper bent plate, 10, a lower bent plate, 11, a switch installation bent plate, 12, an auxiliary handcart, 13, an auxiliary handcart room, 14, a working position signal feedback unit, 15, an auxiliary extension signal feedback unit, 16, a test position signal feedback unit, 17 and a trigger screw.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The position signal feedback device of the auxiliary handcart of the movable switch cabinet shown in fig. 1 to 4 comprises a test position signal feedback unit 16 and a working position signal feedback unit 14 which are fixed on the inner side wall of an auxiliary handcart room 13 and are installed on the same bottom plate and have the same structure, wherein the test position signal feedback unit 16 is close to a cabinet door of the switch cabinet, the test position signal feedback unit 16 comprises a U-shaped switch installation bent plate 11 with an opening facing the handcart type side wall, the upper end and the lower end of the side wall of the switch installation bent plate 11 are respectively connected with an L-shaped upper bent plate 9 and one vertical side edge of a U-shaped lower bent plate 10 with a downward opening through bolts, and a magnetic blowing switch 8 is arranged between the upper bent plate 9 and the lower bent plate 10; the front end of the horizontal side wall of the lower bending plate 10 is provided with a strip seam, the bottom of the strip-shaped driving plate 3 passes through the strip seam and is hinged with one end of the roller unit 2 on the inner side of the other side wall of the lower bending plate 10, the roller unit 2 and the driving plate 3 form an L shape, the roller unit 2 is positioned in the inner cavity of the lower bending plate 10, the middle part of the driving plate 3 is provided with a trigger screw 17 penetrating through the driving plate 3, the rear part of the trigger screw 17 is provided with a through hole, a metal wire at the upper part of the tension spring 7 penetrates through the through hole and is fixed on the lower horizontal side edge of the Z-shaped micro switch pressing plate 6, and the bottom end of the tension spring 7 is fixed on the upper surface of the lower bending plate 10; the rear end of the upper horizontal side edge of the micro switch pressing plate 6 is adjacent to the magnetic blow switch 8; when the auxiliary handcart 12 advances into the switch cabinet body from the cabinet door, after the top of a signal trigger plate 1 arranged on the auxiliary handcart 12 contacts with a roller unit 2 in a test position signal feedback unit 16, the roller unit 2 is lifted upwards to drive a driving plate 3 to rotate clockwise, the top end of the side wall of a trigger screw 17 contacts with the lower horizontal side edge of a micro switch pressing plate 6, the micro switch pressing plate 6 is gradually lifted, the rear end of the upper horizontal side edge of the micro switch pressing plate 6 triggers a magnetic blowing switch 8 to be closed, a closing signal of the magnetic blowing switch 8 is transmitted to an industrial controller, and a signal lamp of the auxiliary handcart at a test position in the industrial controller is lightened; when the auxiliary handcart 12 continues to be pushed into the cabinet body, the signal trigger plate 1 triggers the magnetic blow switch 8 of the working position signal feedback unit 14, and a signal lamp at the working position of the auxiliary handcart in the industrial controller is simultaneously turned on; when the top end of the signal trigger plate 1 is not contacted with the roller unit 2, the driving plate 3 and the micro switch pressing plate 6 return to the original positions under the action of the tension spring 7, and the driving plate 3 pushes the roller unit 2 to return to the original positions; when the auxiliary handcart 12 is pulled out of the cabinet body, the signal trigger plate 1 on the auxiliary handcart 12 sequentially triggers the magnetic blowing switches 8 in the working position signal feedback unit 14 and the test position signal feedback unit 16, the two magnetic blowing switches 8 are sequentially disconnected, and the signal lamps of the auxiliary handcart in the working position and the test position in the industrial controller are sequentially extinguished, so that an operator can clearly judge the position of the auxiliary handcart.
An auxiliary extension signal feedback unit 15 is arranged between the working position signal feedback unit 14 and the test position signal feedback unit 16, the auxiliary extension signal feedback unit 15 comprises a U-shaped switch installation bent plate 11 with an opening facing the handcart type side wall, the upper end and the lower end of the side wall of the switch installation bent plate 11 are respectively connected with an L-shaped upper bent plate 9 and one vertical side edge of a U-shaped lower bent plate 10 with a downward opening through bolts, and a magnetic blowing switch 8 is arranged between the upper bent plate 9 and the lower bent plate 10; the front end of the horizontal side wall of the lower bending plate 10 is provided with a strip slit, the strip shape is hinged on the side wall of the lower bending plate 10 from the bottom of the driving plate 5 through the strip slit, the top of the driving plate 5 is hinged with the top end of the driving plate 3 of the working position signal feedback unit 14 through a horizontally arranged driving connecting rod 4, a triggering screw rod 17 penetrating through the driving plate 5 is arranged in the middle of the driving plate 5, the rear part of the triggering screw rod 17 is adjacent to the lower horizontal side edge of the Z-shaped micro switch pressing plate 6, and the rear end of the upper horizontal side edge of the micro switch pressing plate 6 is adjacent to the magnetic blowing switch 8; when the signal trigger plate 1 on the auxiliary handcart 12 triggers the magnetic blow switch 8 in the working position signal feedback unit 14, the magnetic blow switch 8 in the auxiliary extension signal feedback unit 15 is closed/opened along with the magnetic blow switch 8 in the working position signal feedback unit 14 under the linkage action of the driving plate 3, the driving connecting rod 4 and the driven plate 5.
The roller unit 2 includes two clamping plates and rollers connected to the bottom ends of the clamping plates by rolling shafts, and the upper portions of the clamping plates are hinged between the two side walls of the lower bending plate 10.
The top of the signal trigger plate 1 is provided with a circular arc-shaped top plate, and when the top plate of the signal trigger plate 1 is contacted with the roller unit 2, the roller rolls on the top plate.
According to the invention, the auxiliary handcart position working position signal feedback unit and the test position signal feedback unit are arranged on the inner side wall of the auxiliary handcart room, the magnetic blowing switches are arranged in the signal feedback units, and the position of the auxiliary handcart is fed back on the industrial controller through the closing/opening of the magnetic blowing switches, so that an operator can conveniently and clearly identify the position of the auxiliary handcart, misoperation is avoided, and the reliability of equipment is improved.
Claims (3)
1. The utility model provides a portable cubical switchboard assists handcart position signal feedback device, it includes test position signal feedback unit (16) and work position signal feedback unit (14) that install the same structure on same bottom plate on auxiliary handcart room (13) inside wall, test position signal feedback unit (16) are close to cubical switchboard cabinet door department, its characterized in that: the test position signal feedback unit (16) comprises a U-shaped switch installation bent plate (11) with an opening facing the handcart type side wall, the upper end and the lower end of the side wall of the switch installation bent plate (11) are respectively connected with an L-shaped upper bent plate (9) and one vertical side edge of a U-shaped lower bent plate (10) with a downward opening through bolts, and a magnetic blowing switch (8) is arranged between the upper bent plate (9) and the lower bent plate (10); the front end of the horizontal side wall of the lower bending plate (10) is provided with a strip seam, the bottom of the strip-shaped driving plate (3) passes through the strip seam and is hinged with one end of the roller unit (2) on the inner side of the other side wall of the lower bending plate (10), the roller unit (2) and the driving plate (3) form an L shape, the roller unit (2) is positioned in the inner cavity of the lower bending plate (10), the middle part of the driving plate (3) is provided with a trigger screw (17) penetrating through the driving plate (3), the rear part of the trigger screw (17) is provided with a through hole, a metal wire at the upper part of the tension spring (7) penetrates through the through hole and is fixed on the lower horizontal side edge of the Z-shaped micro switch pressing plate (6), and the bottom end of the tension spring (7) is fixed on the upper surface of the lower bending plate (10); the rear end of the horizontal side edge of the upper part of the micro switch pressing plate (6) is adjacent to the magnetic blow switch (8); when the auxiliary handcart (12) is pushed into the switch cabinet body from the cabinet door, after the top of a signal trigger plate (1) arranged on the auxiliary handcart (12) is contacted with a roller unit (2) in a test position signal feedback unit (16), the roller unit (2) is lifted upwards to drive a driving plate (3) to rotate clockwise, the top end of the side wall of a trigger screw (17) is contacted with the lower horizontal side edge of a micro switch pressing plate (6), the micro switch pressing plate (6) is gradually lifted, the rear end of the upper horizontal side edge of the micro switch pressing plate (6) triggers a magnetic blowing switch (8) to be closed, a closing signal of the magnetic blowing switch (8) is transmitted to an industrial controller, and a signal lamp of the auxiliary handcart in a test position in the industrial controller is lightened; when the auxiliary handcart (12) continues to push into the cabinet body, the signal trigger plate (1) triggers the magnetic blowing switch (8) of the working position signal feedback unit (14), and a signal lamp of the auxiliary handcart at the working position in the industrial controller is simultaneously turned on; when the top end of the signal trigger plate (1) is not contacted with the roller unit (2), the driving plate (3) and the micro switch pressing plate (6) return to the original positions under the action of the tension spring (7), and the driving plate (3) pushes the roller unit (2) to return to the original positions; when the auxiliary handcart (12) is pulled out of the cabinet body, the signal trigger plate (1) on the auxiliary handcart (12) sequentially triggers the magnetic blowing switches (8) in the working position signal feedback unit (14) and the test position signal feedback unit (16), the two magnetic blowing switches (8) are sequentially disconnected, and the signal lamps of the auxiliary handcart in the working position and the test position in the industrial controller are sequentially extinguished, so that an operator can clearly judge the position of the auxiliary handcart;
An auxiliary extension signal feedback unit (15) is arranged between the working position signal feedback unit (14) and the test position signal feedback unit (16), the auxiliary extension signal feedback unit (15) comprises a U-shaped switch installation bent plate (11) with an opening facing a handcart type side wall, the upper end and the lower end of the side wall of the switch installation bent plate (11) are respectively connected with an L-shaped upper bent plate (9) and one vertical side edge of a U-shaped lower bent plate (10) with a downward opening through bolts, and a magnetic blowing switch (8) is arranged between the upper bent plate (9) and the lower bent plate (10); the front end of the horizontal side wall of the lower bending plate (10) is provided with a strip slit, the strip-shaped side wall of the lower bending plate (10) is hinged with the strip slit from the bottom of the driving plate (5), the top of the driving plate (5) is hinged with the top end of the driving plate (3) of the working position signal feedback unit (14) through a horizontally arranged driving connecting rod (4), a triggering screw (17) penetrating the driving plate (5) is arranged in the middle of the driving plate (5), the rear part of the triggering screw (17) is adjacent to the lower horizontal side edge of the Z-shaped micro switch pressing plate (6), and the rear end of the upper horizontal side edge of the micro switch pressing plate (6) is adjacent to the magnetic blowing switch (8); when a signal trigger plate (1) on an auxiliary handcart (12) triggers a magnetic blow switch (8) in a working position signal feedback unit (14), under the linkage action of a driving plate (3), a driving connecting rod (4) and a slave driving plate (5), the magnetic blow switch (8) in an auxiliary extension signal feedback unit (15) is closed/opened along with the magnetic blow switch (8) in the working position signal feedback unit (14);
The auxiliary extension signal feedback unit (15) provides a signal source for the electronic monitoring protection equipment of the switch cabinet, and when the signal node is insufficient or damaged, the auxiliary extension signal feedback unit can be immediately put into use, and multipath signals are output in parallel.
2. The mobile switching closet auxiliary cart position signal feedback device of claim 1, wherein: the roller unit (2) comprises two clamping plates and rollers connected to the bottom ends of the clamping plates through rolling shafts, and the upper parts of the clamping plates are hinged between the two side walls of the lower bending plate (10).
3. The mobile cubical switchboard-assisted cart position signal feedback device of claim 2, wherein: the top of the signal trigger plate (1) is provided with a circular arc-shaped top plate, and when the top plate of the signal trigger plate (1) is contacted with the roller unit (2), the roller rolls on the top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633543.1A CN109560497B (en) | 2018-12-29 | 2018-12-29 | Auxiliary handcart position signal feedback device of movable switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633543.1A CN109560497B (en) | 2018-12-29 | 2018-12-29 | Auxiliary handcart position signal feedback device of movable switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN109560497A CN109560497A (en) | 2019-04-02 |
| CN109560497B true CN109560497B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811633543.1A Active CN109560497B (en) | 2018-12-29 | 2018-12-29 | Auxiliary handcart position signal feedback device of movable switch cabinet |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106560B (en) * | 2019-10-12 | 2022-04-05 | 河南平高通用电气有限公司 | Switch cabinet and grounding handcart |
| CN111129998B (en) * | 2019-12-17 | 2022-07-01 | 上海平高天灵开关有限公司 | Intelligent handcart switch cabinet position double-confirmation protection dynamic locking device |
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| CN109560497A (en) | 2019-04-02 |
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Address after: 741020 Runtian Avenue, Shetang Industrial Park, Tianshui Economic and Technological Development Zone, Tianshui City, Gansu Province Applicant after: Tianshui Great Wall switchgear Group Co.,Ltd. Applicant after: Gansu Changcheng Hydrogen Energy Engineering Research Institute Co.,Ltd. Address before: 741020 Great Wall Electrical Industrial Park, Shetang Industrial Park, Tianshui Economic and Technological Development Zone, Tianshui City, Gansu Province Applicant before: Gansu Changcheng Hydrogen Energy Engineering Research Institute Co.,Ltd. Applicant before: Tianshui Great Wall switchgear Group Co.,Ltd. Address after: 741020 Great Wall Electrical Industrial Park, Shetang Industrial Park, Tianshui Economic and Technological Development Zone, Tianshui City, Gansu Province Applicant after: Gansu Changcheng Hydrogen Energy Engineering Research Institute Co.,Ltd. Applicant after: Tianshui Great Wall switchgear Group Co.,Ltd. Address before: 741020 Great Wall Electrical Industrial Park, Shetang Industrial Park, Tianshui Economic and Technological Development Zone, Tianshui City, Gansu Province Applicant before: GANSU GREAT WALL ELECTRICAL ENGINEERING AND ELECTRICAL APPLIANCE ENGINEERING RESEARCH INSTITUTE Co.,Ltd. Applicant before: TIANSHUI CHANGCHENG SWITCHGEAR Co.,Ltd. |
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