CN114050070A - Interlocking device for cable chamber door of high-voltage switch cabinet - Google Patents
Interlocking device for cable chamber door of high-voltage switch cabinet Download PDFInfo
- Publication number
- CN114050070A CN114050070A CN202111192910.0A CN202111192910A CN114050070A CN 114050070 A CN114050070 A CN 114050070A CN 202111192910 A CN202111192910 A CN 202111192910A CN 114050070 A CN114050070 A CN 114050070A
- Authority
- CN
- China
- Prior art keywords
- interlocking
- plate
- cable chamber
- top plate
- chamber door
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000005452 bending Methods 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/306—Accessories, e.g. windows
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention relates to an interlocking device for a cable chamber door of a high-voltage switch cabinet, which comprises a bracket, a driving sheet, a pin shaft, an interlocking pull rod, an interlocking pull plate and the like. When the cable chamber door of the high-voltage cabinet is closed, force acts on the transmission sheet to drive the interlocking pull plate, and the interlocking rod is driven to be inserted into a top plate round hole of the cable chamber door; when the grounding switch is operated to open the switch, the cam on the grounding switch operating shaft presses the interlocking rod and cannot rebound, so that the effect of locking the cable chamber door is achieved.
Description
Technical Field
The invention relates to the technical field of high-voltage electrical equipment, in particular to an interlocking device for a cable chamber door of a high-voltage switch cabinet.
Background
The five-prevention interlocking is necessary equipment of the high-voltage switch cabinet, is a protective measure for preventing an operator from entering a contact live interval and forbidding any misoperation on a switch, is a last barrier for protecting the operator and the equipment, and has a self-evident significance for the high-voltage switch cabinet. The interlocking device of the cable chamber door of the existing high-voltage switch cabinet is mainly realized by direct insertion of an operating mechanism and can only meet the requirements of a general high-voltage cabinet body. The interlocking device of the cable chamber door in the prior art has a single structure, the five-prevention interlocking is imperfect, and more potential safety hazards exist during operation.
Disclosure of Invention
Based on the above situation of the prior art, the invention aims to provide the interlocking device for the cable chamber door of the high-voltage switch cabinet, which applies the mechanical principle of a connecting rod, has the advantages of ingenious design and simple structure, and is more reliable than the interlocking device for the cable chamber door in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an interlocking device for a cable chamber door of a high voltage switch cabinet, comprising a connecting rod transmission mechanism, an interlocking pull rod 4 and an interlocking rod 5; wherein the content of the first and second substances,
the connecting rod transmission mechanism comprises an interlocking pull plate 6, the interlocking pull plate 6 is of a bending structure, and the bending structure comprises a first vertical plate and a second vertical plate in the vertical direction and a transverse plate for connecting the first vertical plate and the second vertical plate;
the interlocking rod 5 is connected with a first vertical plate;
the interlocking pull rod 4 is flexibly and fixedly connected with the transverse plate, so that the interlocking pull rod 4 has small movement allowance.
Further, the connecting rod transmission mechanism further comprises a transmission piece 3 and a bracket 1;
the transmission piece 3 comprises a triangular transmission connecting rod, and a first vertex of the triangle is connected with the support 1 through a first pin shaft 2.
Further, a second vertex of the triangle is connected with a second vertical plate of the interlocking pulling plate 6 through a second pin shaft 2; the third vertex of the triangle extends to form a rectangular bending structure, and the edge of the bending surface of the rectangular bending structure is provided with a bending edge.
Further, the support 1 is an L-shaped bending structure, and a top plate of the L-shaped bending structure is fixedly connected with the top of the cable chamber.
Further, the cable chamber further comprises a top plate 82, and the top plate 82 is fixed on the horizontal direction of the inner side of the cable chamber door.
Further, an interlocking hole is provided on the top plate 82 for insertion of the interlocking lever 4.
Further, one side of the top plate 82 is in contact with the curved side of the rectangular bent structure of the driving strap 3.
Further, the top plate 82 and the cable chamber door are an integral component, the top plate 82 rotates clockwise against the bending edge of the driving strap 3, and the driving strap 3 drives the interlocking pull rod 4 to be inserted downwards into the interlocking hole of the top plate 82.
Furthermore, the top of the cable chamber is provided with a guide hole of the interlocking pull rod 4.
In summary, the invention provides an interlocking device for a cable chamber door of a high-voltage switch cabinet, which comprises a bracket, a driving sheet, a pin shaft, an interlocking pull rod, an interlocking pull plate and the like. When the cable chamber door of the high-voltage cabinet is closed, force acts on the transmission sheet to drive the interlocking pull plate, and the interlocking rod is driven to be inserted into a top plate round hole of the cable chamber door; when the grounding switch is operated to open the switch, the cam on the grounding switch operating shaft presses the interlocking rod and cannot rebound, so that the effect of locking the cable chamber door is achieved.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) by adopting the technical scheme of the invention, the interlocking device of the cable chamber door of the high-voltage switch cabinet is optimized, and the connecting rod transmission mechanism is composed of the transmission piece, the bracket and the interlocking pull plate and has simple structure and easy installation and processing.
(2) The movement allowance is arranged between the interlocking pulling plate and the interlocking pulling rod, so that the mechanical stress generated by the downward movement of the interlocking pulling plate driven by the interlocking pulling plate can be reduced, and the service life of the interlocking device is prolonged.
(3) The end, inserted into the top plate, of the interlocking pull rod is arc-shaped, and the arc shape can increase the contact area of the interlocking pull rod and the interlocking hole of the top plate, so that the interlocking capacity of the interlocking device is improved.
(4) The position of the contact between the driving strap and the top plate is provided with a bent edge so as to increase the contact area between the driving strap and the top plate, thereby improving the reliability of the device.
(5) The top plate is an interlocking plate of the cable chamber door, namely the cable chamber door and the top plate are arranged into an integral structure, so that the material is saved, and the cost of the interlocking device is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the interlocking device for the cable chamber door of the high-voltage switch cabinet;
fig. 2 is a schematic side view of the interlocking device for the cable chamber door of the high-voltage switch cabinet.
Fig. 3 is a schematic perspective view of the interlock apparatus of the present invention.
Fig. 4 is a schematic view of the connection structure of the pin shaft and the split washer of the present invention.
Fig. 5 is a schematic view of the stent structure of the present invention.
FIG. 6 is a schematic view of the structure of the driving strap of the present invention.
Fig. 7 is a schematic view of the top plate structure of the present invention.
Fig. 8 is a schematic view of the interlocking pull plate structure of the present invention.
Fig. 9 is a schematic view of the interlocking tie bar structure of the present invention.
Fig. 10 is a schematic view of the split retaining ring structure of the present invention.
Fig. 11 is a schematic view of the pin structure of the present invention.
Description of reference numerals: 1-bracket, 2-pin shaft, 3-driving piece, 4-interlocking pull rod, 5-interlocking rod, 6-interlocking pull plate, 7-mechanism chamber panel, 81-cable chamber door, 82-top plate, 9-cable chamber, 10-split retainer ring and 11-locknut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to one embodiment of the invention, an interlocking device for a cable chamber door of a high-voltage switch cabinet is provided, and the overall structure of the interlocking device is schematically shown in fig. 1 and comprises a connecting rod transmission mechanism, an interlocking pull rod 4 and an interlocking rod 5; wherein the content of the first and second substances,
the connecting rod transmission mechanism comprises an interlocking pull plate 6, fig. 8 shows a structural schematic diagram of the interlocking pull plate, as shown in fig. 8, the interlocking pull plate 6 is a bent structure, the bent structure comprises a first vertical plate and a second vertical plate in the vertical direction, and a transverse plate connecting the first vertical plate and the second vertical plate, fig. 2 shows a side view structural schematic diagram of the high-voltage switch cabinet cable chamber door interlocking device, as shown in fig. 2, the interlocking rod 5 is connected with the first vertical plate, and can be connected through common connection modes such as bolt connection and the like; the interlocking pull rod 4 is a columnar structure, fig. 9 shows a schematic structural diagram of the interlocking pull rod, the interlocking pull rod 4 is flexibly and fixedly connected with a transverse plate, for example, the transverse plate of the interlocking pull plate 6 can be flexibly and fixedly connected with the interlocking pull rod 4 through two locknuts 11, so that the interlocking pull rod 4 has a small movement margin, and thus, the mechanical stress generated by the downward movement of the interlocking pull rod 4 driven by the interlocking pull plate 6 can be reduced, and the service life of the interlocking device can be prolonged.
Fig. 3 shows a schematic perspective view of the interlocking device, and the connecting rod transmission mechanism further comprises a transmission piece 3 and a bracket 1; fig. 6 shows a schematic structural diagram of a transmission strap, as shown in fig. 3, the transmission strap 3 includes a triangular transmission link, a first vertex of the triangle is connected to the bracket 1 through a first pin 2, a second vertex of the triangle is connected to a second riser of the interlocking pull plate 6 through a second pin 2, the connection can be achieved through the cooperation of the pin 2 and a split washer 10, fig. 4 shows a schematic structural diagram of the pin and the split washer, fig. 10 shows a schematic structural diagram of the split washer, and fig. 11 shows a schematic structural diagram of the pin. The third vertex of the triangle extends to form a rectangular bending structure, and the edge of the bending surface of the rectangular bending structure is provided with a bending edge. Fig. 5 shows a structural schematic diagram of the bracket, and as shown in fig. 1, the bracket 1 is an L-shaped bent structure, and a top plate of the L-shaped bent structure is fixedly connected with the top of the cable chamber.
A mechanism chamber panel 7 is arranged on the right side of the interlocking rod 5 of the interlocking device along the vertical direction, a cable chamber door 81 is arranged on the lower side of the mechanism chamber panel 7, and a top plate 82 is fixed on the inner side of the cable chamber door 81 along the horizontal direction. The interlock device further includes a top plate 82, the top plate 82 being fixed to the horizontal direction inside the cable chamber door. Fig. 7 shows a schematic structural view of the top plate, and as shown in fig. 7, the top plate 82 is provided with an interlocking hole for inserting the interlocking rod 4. Wherein the top plate 82 can be simultaneously an interlocking plate of the cable chamber door 81, thereby saving the use of materials and reducing the cost of the interlocking device. One side of the top plate 82 is in contact with the bent side of the rectangular bending structure of the driving strap 3, the edge of the bending surface of the rectangular bending structure of the driving strap 3 is set to be the bent side, the contact area between the driving strap 3 and the top plate 82 can be increased, and therefore the reliability of the device is improved.
The top plate 82 and the cable chamber door are an integral part, the top plate 82 rotates clockwise against the bending edge of the driving sheet 3, and the driving sheet 3 drives the interlocking pull rod 4 to be inserted into the interlocking hole of the top plate 82 downwards. When the cable chamber door 81 is closed, the top plate 82 pushes against the driving strip 3 to rotate clockwise around the pin shaft 2 and the split washer 10, the driving strip 3 drives the interlocking pull rod 4 to be inserted downwards into the interlocking hole of the top plate 82, and meanwhile, the interlocking rod 5 is driven to move downwards, so that the interlocking of the cable chamber door 81 is completed. One end of the interlocking pull rod 4 inserted into the top plate 82 can be in an arc shape, and the other end of the interlocking pull rod 4 is an M8 stud, wherein the arc shape can increase the contact area of the interlocking pull rod 4 and the interlocking hole of the top plate 82, so that the interlocking capacity of the interlocking device is improved. The top of the cable chamber is also provided with a guide hole of the interlocking pull rod 4.
In summary, the invention relates to an interlocking device for a cable chamber door of a high-voltage switch cabinet, which comprises a bracket, a driving sheet, a pin shaft, an interlocking pull rod, an interlocking pull plate and the like. When the cable chamber door of the high-voltage cabinet is closed, force acts on the transmission sheet to drive the interlocking pull plate, and the interlocking rod is driven to be inserted into a top plate round hole of the cable chamber door; when the grounding switch is operated to open the switch, the cam on the grounding switch operating shaft presses the interlocking rod and cannot rebound, so that the effect of locking the cable chamber door is achieved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. An interlocking device for a cable chamber door of a high-voltage switch cabinet is characterized by comprising a connecting rod transmission mechanism, an interlocking pull rod (4) and an interlocking rod (5); wherein the content of the first and second substances,
the connecting rod transmission mechanism comprises an interlocking pull plate (6), the interlocking pull plate (6) is of a bending structure, and the bending structure comprises a first vertical plate and a second vertical plate in the vertical direction and a transverse plate for connecting the first vertical plate and the second vertical plate;
the interlocking rod (5) is connected with a first vertical plate;
the interlocking pull rod (4) is flexibly and fixedly connected with the transverse plate, so that the interlocking pull rod (4) has small movement allowance.
2. An interlock device according to claim 1, wherein the link transmission further comprises a transmission strap (3) and a bracket (1);
the transmission piece (3) comprises a triangular transmission connecting rod, and a first vertex of the triangle is connected with the support (1) through a first pin shaft (2).
3. The interlocking device according to claim 2, characterized in that the second vertex of the triangle is connected to the second riser of the interlocking pull plate (6) by a second pin (2); the third vertex of the triangle extends to form a rectangular bending structure, and the edge of the bending surface of the rectangular bending structure is provided with a bending edge.
4. An interlocking device according to claim 3, characterized in that the bracket (1) is an L-shaped bent structure, the top plate of which is fixedly connected with the top of the cable chamber.
5. The interlock device according to claim 4 further comprising a top plate (82), said top plate (82) being fixed to the horizontal direction inside the cable chamber door.
6. An interlocking device according to claim 5, characterized in that the top plate (82) is provided with an interlocking hole for insertion of the interlocking pull rod (4).
7. An interlocking device according to claim 6, characterized in that one side of the top plate (82) is in contact with the curved side of the rectangular bent structure of the driving strap (3).
8. The interlocking device according to claim 7, characterized in that the top plate (82) is an integral part of the cable chamber door, the top plate (82) rotates clockwise against the curved edge of the driving lug (3), and the driving lug (3) drives the interlocking pull rod (4) to insert downwards into the interlocking hole of the top plate (82).
9. Interlocking device according to claim 8, characterized in that the cable chamber is provided with a guide hole for the interlocking lever (4) at the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111192910.0A CN114050070B (en) | 2021-10-13 | 2021-10-13 | High tension switchgear cable room door interlock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111192910.0A CN114050070B (en) | 2021-10-13 | 2021-10-13 | High tension switchgear cable room door interlock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114050070A true CN114050070A (en) | 2022-02-15 |
| CN114050070B CN114050070B (en) | 2024-05-14 |
Family
ID=80204671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111192910.0A Active CN114050070B (en) | 2021-10-13 | 2021-10-13 | High tension switchgear cable room door interlock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114050070B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201398027Y (en) * | 2009-02-24 | 2010-02-03 | 上海大华电器设备有限公司 | Interlock device for grounding switch of metal-clad switchgear and cable chamber door |
| WO2013097175A1 (en) * | 2011-12-30 | 2013-07-04 | Abb Technology Ltd. | Mechanical interlock device among cable door, rear door and earthing switch |
| DE202013105328U1 (en) * | 2013-11-22 | 2014-05-06 | Rittal Gmbh & Co. Kg | Door locking mechanism for the operation of the blocking gate of a circuit breaker to a cabinet and a corresponding cabinet assembly |
| CN106206146A (en) * | 2016-08-31 | 2016-12-07 | 华仪电气股份有限公司 | The earthed switch of a kind of switch cubicle and the interlock of door |
| CN206148309U (en) * | 2016-10-31 | 2017-05-03 | 威胜电气有限公司 | SF6 aerifys interlock that interior control cable room of cabinet door was opened and close |
| RU172288U1 (en) * | 2017-01-10 | 2017-07-04 | Закрытое акционерное общество "Группа компаний "Электрощит"-ТМ Самара" | SWITCHING DEVICE FOR SWITCHING APPLIANCES AND CABLE DOORS OF THE DISTRIBUTION DEVICE |
| CN207602430U (en) * | 2017-12-08 | 2018-07-10 | 西门子中压开关技术（无锡）有限公司 | The interlock assembly and switchgear of switchgear |
| CN209747373U (en) * | 2019-03-19 | 2019-12-06 | 天津平高智能电气有限公司 | Switch cabinet with earthing switch and front cable chamber door arranged in interlocking manner |
-
2021
- 2021-10-13 CN CN202111192910.0A patent/CN114050070B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201398027Y (en) * | 2009-02-24 | 2010-02-03 | 上海大华电器设备有限公司 | Interlock device for grounding switch of metal-clad switchgear and cable chamber door |
| WO2013097175A1 (en) * | 2011-12-30 | 2013-07-04 | Abb Technology Ltd. | Mechanical interlock device among cable door, rear door and earthing switch |
| DE202013105328U1 (en) * | 2013-11-22 | 2014-05-06 | Rittal Gmbh & Co. Kg | Door locking mechanism for the operation of the blocking gate of a circuit breaker to a cabinet and a corresponding cabinet assembly |
| CN106206146A (en) * | 2016-08-31 | 2016-12-07 | 华仪电气股份有限公司 | The earthed switch of a kind of switch cubicle and the interlock of door |
| CN206148309U (en) * | 2016-10-31 | 2017-05-03 | 威胜电气有限公司 | SF6 aerifys interlock that interior control cable room of cabinet door was opened and close |
| RU172288U1 (en) * | 2017-01-10 | 2017-07-04 | Закрытое акционерное общество "Группа компаний "Электрощит"-ТМ Самара" | SWITCHING DEVICE FOR SWITCHING APPLIANCES AND CABLE DOORS OF THE DISTRIBUTION DEVICE |
| CN207602430U (en) * | 2017-12-08 | 2018-07-10 | 西门子中压开关技术（无锡）有限公司 | The interlock assembly and switchgear of switchgear |
| CN209747373U (en) * | 2019-03-19 | 2019-12-06 | 天津平高智能电气有限公司 | Switch cabinet with earthing switch and front cable chamber door arranged in interlocking manner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114050070B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120287572A1 (en) | Power Outlet with Jack Safety Shield Device | |
| CN110190548B (en) | Switch cabinet with front cable chamber door | |
| CN201608429U (en) | Interlocking device of switch cabinet rear door and grounding switch | |
| CN114050070A (en) | Interlocking device for cable chamber door of high-voltage switch cabinet | |
| CN211828535U (en) | Low-voltage cabinet door mechanical interlocking device | |
| KR101690133B1 (en) | Interlock Device of Ring Main Unit | |
| CN209860466U (en) | Power distribution switchgear and aviation plug interlocking device thereof | |
| KR100987585B1 (en) | A cell switch operating rod for cubicle | |
| CN206672847U (en) | It is a kind of to operate light non-maintaining disconnecting switch | |
| CN209169035U (en) | A kind of safe interlocked control switch | |
| CN115472451A (en) | Mechanical interlocking device for switch cabinet and switch cabinet | |
| CN102891046A (en) | Circuit breaker interlocking device | |
| CN218759422U (en) | Rotary valve mechanism of switch cabinet | |
| CN105575698B (en) | GIS combination electric appliance ground switch interlocking device | |
| CN110957171A (en) | Safety interlocking device of front lower door of switch cabinet | |
| CN111884117A (en) | Handcart secondary plug interlocking device | |
| CN209785792U (en) | Lower door interlocking mechanism of switch cabinet | |
| CN213459492U (en) | Locking device of switch cabinet | |
| CN115749495A (en) | Rotary valve mechanism of switch cabinet | |
| CN220209625U (en) | Double-shielding contact box for high-voltage switch cabinet | |
| CN113990688B (en) | Cabinet door interlocking device for switch equipment and switch equipment | |
| CN218919768U (en) | Interlocking mechanism on environment-friendly cabinet | |
| KR101594868B1 (en) | Interlock Device of Vacuum Circuit Breaker | |
| CN211376516U (en) | Safety interlocking device of front lower door of switch cabinet | |
| CN216957876U (en) | New forms of energy high pressure vacuum load switch shutting operating device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |