A switch cabinet grounding interlocking device

Abstract

The utility model relates to electrical switchgear field especially relates to a switchgear cabinet grounding interlock device, including interlock buckle, interlock shaft and from top to bottom interlock plate, interlock middle plate and interlock mounting plate are set horizontally in proper order, the quantity of structure spare parts of this patent is less, and the structure is relatively simple, can realize the quick installation and maintenance of this structure, when the ring main unit switchgear equipment is in operation or circuit failure, through the grounding state of equipment as trigger condition, when the line normal live operation, this structure will cabinet door be fixed in the locking state, avoid opening cabinet door, when the line failure power-off maintenance, this structure removes the locking of cable room door, at this moment can open cabinet door, carries out the maintenance to the line, ensures the safety of operator, and follows electrical safety regulation, improves the safety and reliability of switchgear operation effectively simultaneously, provides solid safeguard for the stable operation of power system.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear, and in particular to a grounding interlocking device for switchgear. Background Technology

[0002] In high-voltage switchgear systems, the interlocking mechanism plays a crucial role as a core safety component. The switchgear houses important electrical equipment such as high-voltage circuit breakers, low-voltage circuit breakers, switchgear, transformers, and cables. To ensure the reliability of system operation and the safety of maintenance personnel, the interlocking mechanism must achieve precise and reliable mechanical interlocking.

[0003] Currently, conventional high-voltage air-insulated switchgear requires careful control over the opening and closing status of the main switch and grounding switch to avoid dangers and damage caused by improper operation. When the switchgear door is closed, it is necessary to control whether operation of the main switch and grounding switch is permitted, and the current status of the grounding switch must be clearly defined. Furthermore, when maintenance operations are required on the switchgear, the door must be opened. For safety, the grounding switch must be grounded during this time, and unauthorized personnel are prohibited from operating it; therefore, appropriate safety measures are required.

[0004] Existing patent CN 201020678726.8 provides a switch cabinet interlocking device, including an interlocking fixing frame (2), a square sliding guide rail (3), a first pull wire (4) and a first white tube (41), a tower spring (5), a grounding lock plate (6), a second pull wire (7) and a second white tube (71), a Z-shaped spring (8) and an interlocking shaft (9). The interlocking shaft (9) moves up and down along the hole in the middle of the square sliding guide (3). The tower spring (5) is mounted on the square sliding guide (3) and acts on the washer fixed to the interlocking shaft (9). The first pull wire (4) is fixed to the upper end of the interlocking shaft (9). The second pull wire (7) drives the grounding lock plate (6) to slide in the square groove of the square sliding guide (3). The grounding lock plate (6) has a socket on the left end that can be inserted into the interlocking shaft (9). The zig spring (8) is mounted between the square sliding guide (3) and the interlocking fixing bracket (2) and locks the interlocking shaft (9). The socket on the mounting plate of the door (1) can pass through the groove at the bottom of the interlocking shaft (9).

[0005] However, the above patent still has the following defects: it includes a square sliding guide rail 3, a first pull wire 4 and a first white tube 41, a tower spring 5, a grounding lock plate 6, a second pull wire 7 and a second white tube 71, a Z-shaped spring 8 and an interlocking shaft 9, and the second pull wire 7 and the grounding lock plate 6 slide in the square groove 10 of the square sliding guide rail 3, and the Z-shaped spring (8) is installed between the square sliding guide rail (3) and the interlocking fixing frame (2). The number of parts is large and the structure is relatively complex, which is not conducive to quick installation and maintenance. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a grounding interlocking device for switchgear.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a grounding interlocking device for switchgear, the innovation of which is: including an interlocking buckle, an interlocking shaft, and an interlocking plate, an interlocking middle plate, and an interlocking mounting plate arranged horizontally from top to bottom;

[0008] The interlocking buckle is a Z-shaped spring, including a locking section and an opening section. The locking section is horizontally positioned between the interlocking mounting plate and the interlocking plate, and the opening section is vertically positioned downward through the interlocking plate.

[0009] The interlocking shaft is vertically arranged inside the bayonet section. The interlocking shaft has an upper groove and a lower groove. The lower groove is connected to the cabinet door, and the upper groove is interlocked with the interlocking buckle. The interlocking with the cabinet door is achieved by inserting the zigzag spring into the upper groove of the interlocking shaft.

[0010] Furthermore, the top of the interlocking shaft is a connecting part, and the bottom is an interlocking part. Both the upper groove and the lower groove are provided on the interlocking part. The bottom of the operating mechanism has a connecting rod, which is located above the interlocking plate and connected to the connecting part. The locking and releasing of the interlocking shaft are achieved by the cooperation of the connecting rod and the interlocking buckle.

[0011] Furthermore, the interlocking shaft includes a body comprising an upper semi-cylinder and a lower cylinder coaxially arranged. The upper semi-cylinder serves as the connecting part, and the lower cylinder serves as the interlocking part. The connecting part has multiple connecting holes, facilitating a quick and precise connection between the connecting part and the connecting rod.

[0012] Furthermore, the interlocking plate includes a horizontally arranged first rectangular plate with a first groove in the middle of one side; the interlocking middle plate includes a horizontally arranged second rectangular plate with a second groove in the middle of one side below the first groove; the interlocking mounting plate includes a horizontally arranged third rectangular plate with a third groove in the middle of one side below the second groove; and an oblong through hole is provided on both sides of the third groove on the interlocking mounting plate.

[0013] The zigzag spring retainer section is horizontally positioned on the third rectangular plate and inside the second groove. The two sides of the zigzag spring opening section pass through the two waist-shaped through holes and are vertically downward. The top of the interlocking shaft passes through the third groove, the second groove, and the first groove from bottom to top, and the interlocking shaft is positioned inside the zigzag spring retainer section, thus enabling accurate and rapid installation of the interlocking shaft and the interlocking retainer.

[0014] Furthermore, the interlocking mounting plate, the interlocking middle plate, and the interlocking plate are connected by bolts, enabling the detachable installation of this structure;

[0015] Furthermore, a first connecting bolt is provided on both sides of the interlocking slot between the first rectangular plate, the second rectangular plate, and the third rectangular plate; a second connecting bolt is provided on the inner side of the interlocking slot between the first rectangular plate and the third rectangular plate, which can realize the rapid and stable installation of this structure.

[0016] The advantages of this utility model are:

[0017] 1. This patented structure has fewer components and a simpler structure, enabling rapid installation and maintenance. When the ring main unit switchgear is running or a circuit fault occurs, the grounding status of the equipment is used as a trigger condition. When the line is running normally with power, this structure keeps the cabinet door locked, preventing it from being opened. When the line is out of service for maintenance due to a fault, this structure releases the lock on the cable compartment door, allowing the cabinet door to be opened for maintenance, ensuring the safety of operators and compliance with electrical safety regulations. This effectively improves the safety and reliability of the switchgear operation, providing a solid guarantee for the stable operation of the power system.

[0018] 2. After the cabinet door is installed, the interlocking latch is split open by the cabinet door, and the interlocking latch will no longer lock the interlocking shaft. The interlocking shaft will move downwards, and the grounding switch can be operated. When the grounding switch is tripped, the interlocking shaft is locked by the operating mechanism, pressing the cabinet door tightly. When the grounding switch is closed, the operating mechanism releases the lock on the interlocking shaft, and the cabinet door can be pulled upwards and opened. When the cabinet door is opened, the interlocking latch will fix the interlocking shaft in a position that can lock the grounding switch through the upper or lower groove, avoiding the need for additional tools to pry open the interlocking latch and preventing manual pulling of the interlocking shaft to unlock and operate the grounding switch, making it convenient and quick.

[0019] 3. First connecting bolts are provided on both sides of the interlocking slot between the first rectangular plate, the second rectangular plate and the third rectangular plate; second connecting bolts are provided on the inner side of the interlocking slot between the first rectangular plate and the third rectangular plate, which can realize the rapid and stable installation of this structure. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is the front view of the present invention.

[0022] Figure 3 This is a schematic diagram of the state structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the state structure of this utility model. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] like Figure 1-4 The switchgear grounding interlocking device shown includes an interlocking buckle 1, an interlocking shaft 2, and an interlocking plate 3, an interlocking middle plate 4, and an interlocking mounting plate 5 arranged horizontally from top to bottom.

[0026] The interlocking buckle 1 is a Z-shaped spring, including a locking section 11 and an opening section 12. The locking section 11 is horizontally set between the interlocking mounting plate 5 and the interlocking plate 3, and the opening section 12 is vertically set downward through the interlocking plate 3.

[0027] The interlocking shaft 2 is vertically set inside the bayonet section 11. The interlocking shaft 2 has an upper groove 23 and a lower groove 24. The lower groove 24 is connected to the cabinet door 8, and the upper groove 23 is interlocked with the interlocking buckle 1. The interlocking with the cabinet door 8 is achieved by inserting the Z-shaped spring into the upper groove 23 of the interlocking shaft 2.

[0028] The top of the interlocking shaft 2 is the connecting part, and the bottom is the interlocking part. The upper groove 23 and the lower groove 24 are both provided on the interlocking part. The bottom of the operating mechanism 6 has a connecting rod 7, which is located above the interlocking plate 3 and connected to the connecting part. The locking and releasing of the interlocking shaft 2 are achieved by the cooperation of the connecting rod 7 and the interlocking buckle 1.

[0029] The interlocking shaft 2 includes a body, which comprises an upper semi-cylinder 21 and a lower cylinder 22 arranged coaxially. The upper semi-cylinder 21 is the connecting part, and the lower cylinder 22 is the interlocking part. The connecting part is provided with multiple connecting holes to facilitate quick and precise connection between the connecting part and the connecting rod 7.

[0030] The interlocking plate 3 includes a horizontally arranged first rectangular plate with a first groove 31 in the middle of one side. The interlocking middle plate 4 includes a horizontally arranged second rectangular plate with a second groove 32 in the middle of its side below the first groove 31. The interlocking mounting plate 5 is Z-shaped and includes a horizontally arranged third rectangular plate with a third groove 33 in the middle of its side below the second groove 32. An oblong through hole is opened on both sides of the third groove 33 on the interlocking mounting plate 5, and the second groove 32 exposes the third groove 33, the two oblong through holes, and the bayonet section 11.

[0031] The Z-shaped spring retaining segment 11 is horizontally set on the third rectangular plate and inside the second groove 32. The Z-shaped spring opening segment 12 passes through two waist-shaped through holes on both sides and is set vertically downward. The top of the interlocking shaft 2 passes through the third groove 33, the second groove 32 and the first groove 31 from bottom to top, and the interlocking shaft 2 is inside the Z-shaped spring retaining segment 11, so as to achieve accurate and quick installation of the interlocking shaft 2 and the interlocking retaining segment.

[0032] The interlocking mounting plate 5, the interlocking middle plate 4, and the interlocking plate 3 are connected by bolts, which enables the detachable installation of this structure.

[0033] First connecting bolts 9 are provided on both sides of the interlocking slot between the first rectangular plate, the second rectangular plate, and the third rectangular plate. Second connecting bolts 10 are provided on the inner side of the interlocking slot between the first rectangular plate and the third rectangular plate, which can realize the rapid and stable installation of this structure.

[0034] This patented structure has fewer components and a simpler design, enabling rapid installation and maintenance. When the ring main unit switchgear is running or a circuit fault occurs, the grounding status of the equipment is used as a trigger condition. When the line is normally energized, the structure keeps the cabinet door 8 locked, preventing it from being opened. When a power outage occurs for line fault repair, the structure releases the lock on the cable compartment door, allowing the cabinet door 8 to be opened for line inspection. This ensures the safety of operators and adherence to electrical safety regulations, effectively improving the safety and reliability of the switchgear operation and providing a solid guarantee for the stable operation of the power system.

[0035] The working principle of this patent:

[0036] After cabinet door 8 is installed, interlocking latch 1 is split open by cabinet door 8, and interlocking latch 1 will no longer lock interlocking shaft 2. Interlocking shaft 2 will drive connecting rod 7 to move downwards, and the grounding switch can be operated. When the grounding switch is tripped, interlocking shaft 2 is locked through connecting rod 7 of operating mechanism 6, pressing cabinet door 8 tightly. When the grounding switch is closed, operating mechanism 6 releases the lock on interlocking shaft 2, and cabinet door 8 can be pulled upwards and opened. When cabinet door 8 is opened, interlocking latch 1 is locked in upper groove 23, thereby fixing interlocking shaft 2 in a position that can lock the grounding switch. This avoids the need for additional tools to pry open interlocking latch 1 and prevents manual pulling of interlocking shaft 2 to unlock and operate the grounding switch, making it convenient and quick.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A grounding interlocking device for switchgear, characterized in that: It includes interlocking buckles, interlocking shafts, and interlocking plates, interlocking middle plates, and interlocking mounting plates arranged horizontally from top to bottom; The interlocking buckle is a Z-shaped spring, including a locking section and an opening section. The locking section is horizontally positioned between the interlocking mounting plate and the interlocking plate, and the opening section is vertically positioned downward through the interlocking plate. The interlocking shaft is vertically arranged inside the bayonet section. The interlocking shaft has an upper groove and a lower groove. The lower groove is connected to the cabinet door, and the upper groove is interlocked with the interlocking buckle. The interlocking with the cabinet door is achieved by inserting the zigzag spring into the upper groove of the interlocking shaft.

2. The switchgear grounding interlocking device according to claim 1, characterized in that: The top of the interlocking shaft is a connecting part, and the bottom is an interlocking part. The upper groove and the lower groove are both provided on the interlocking part. The bottom of the operating mechanism has a connecting rod, which is located above the interlocking plate and connected to the connecting part. The locking and releasing of the interlocking shaft are achieved by the cooperation of the connecting rod and the interlocking buckle.

3. A switchgear grounding interlocking device according to claim 2, characterized in that: The interlocking shaft includes a body, which includes an upper semi-cylinder and a lower cylinder arranged coaxially. The upper semi-cylinder is the connecting part, and the lower cylinder is the interlocking part. The connecting part is provided with multiple connecting holes.

4. The switchgear grounding interlocking device according to claim 1, characterized in that: The interlocking plate includes a horizontally arranged first rectangular plate with a first groove in the middle of one side. The interlocking middle plate includes a horizontally arranged second rectangular plate with a second groove in the middle of one side below the first groove. The interlocking mounting plate includes a horizontally arranged third rectangular plate with a third groove in the middle of one side below the second groove. An oblong through hole is provided on both sides of the third groove on the interlocking mounting plate. The zigzag spring retaining segment is horizontally disposed on the third rectangular plate and located inside the second groove. The two sides of the zigzag spring opening segment pass through the two waist-shaped through holes and are vertically downward. The top of the interlocking shaft passes through the third groove, the second groove and the first groove from bottom to top, and the interlocking shaft is located inside the zigzag spring retaining segment.

5. A switchgear grounding interlocking device according to claim 4, characterized in that: The interlocking mounting plate, the interlocking middle plate, and the interlocking plate are connected by bolts.

6. A switchgear grounding interlocking device according to claim 5, characterized in that: A first connecting bolt is provided on both sides of the interlocking buckle between the first rectangular plate, the second rectangular plate and the third rectangular plate; a second connecting bolt is provided on the inner side of the interlocking buckle between the first rectangular plate and the third rectangular plate.

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