CN222530298U

CN222530298U - A switch cabinet anti-leakage grounding device

Info

Publication number: CN222530298U
Application number: CN202420428068.9U
Authority: CN
Inventors: 吴鹏
Original assignee: Hubei Zhiguang Technology Co ltd
Current assignee: Hubei Zhiguang Technology Co ltd
Priority date: 2024-03-05
Filing date: 2024-03-05
Publication date: 2025-02-25
Anticipated expiration: 2034-03-05

Abstract

The utility model proposes a switch cabinet anti-leakage grounding device, including an isolating switch and a grounding assembly, wherein the isolating switch is provided with an isolating baffle; the grounding assembly includes a grounding rod and a grounding contact; a movable groove is provided in the grounding contact, and a non-return plate is hinged on the grounding contact and is located in the movable groove and one end of the non-return plate is abutted against one side of the movable groove; one end of the grounding rod is connected and fixed to the isolating baffle, and the other end extends into the movable groove and rests on the non-return plate. The switch cabinet anti-leakage grounding device simplifies the operating mechanism of the traditional isolating switch and the grounding knife switch, and realizes the closing of the grounding knife switch by directly utilizing the movement of the isolating baffle during the disconnection process, thereby avoiding the problem of large torque caused by secondary transmission through the connecting rod and the auxiliary shaft in the traditional design.

Description

Anti-leakage grounding device of switch cabinet

Technical Field

The utility model relates to the technical field of anti-creeping grounding, in particular to an anti-creeping grounding device for a switch cabinet.

Background

The grounding switch is typically in interlocking relationship with other operating mechanisms within the switchgear, such as with a disconnector. This means that the earthing knife-switch can only be closed when the disconnector is in an open state. This design ensures that the earthing knife-switch cannot be closed in the case of equipment electrification, thus preventing misoperation. When the equipment needs to be overhauled, an operator can open the circuit breaker and the isolating switch firstly and then close the grounding disconnecting link. In this way, even if the device is accidentally charged, the earthing knife-switch can provide a safe earthing path, leading the current to the ground, thus protecting the service personnel from electric shock.

At present, when the isolating switch needs to be disconnected, the isolating switch in the indoor switch cabinet is in an anti-creeping grounding device, and the insulator is driven to rotate through the main rotating shaft on the rotating support. The insulator makes the isolation baffle rotate and turn up to disconnect, so that the disconnection state of the isolation switch is realized. In order to realize grounding, the main rotating shaft is linked with the auxiliary rotating shaft through the connecting rod, and the grounding knife is transversely turned up by rotating the auxiliary rotating shaft to be contacted with the fixed contact, so that the grounding operation is completed.

However, the design of the main shaft and the auxiliary shaft may require a large moment to realize rotation, which may cause the operator to feel laborious when performing the grounding or disconnection operation, and cause the operator to put a certain burden on the actual operation.

Disclosure of utility model

The utility model provides an anti-creeping grounding device for a switch cabinet, which solves the problems mentioned in the background art.

The technical scheme of the utility model is realized as follows:

The anti-leakage grounding device of the switch cabinet comprises an isolating switch and a grounding assembly, wherein an isolating baffle is arranged on the isolating switch, the grounding assembly comprises a grounding rod and a grounding contact, a movable groove is formed in the grounding contact, a non-return plate which is positioned in the movable groove and one end of the grounding contact is abutted against one side of the movable groove is hinged to the grounding contact, one end of the grounding rod is fixedly connected with the isolating baffle, and the other end of the grounding rod extends into the movable groove and is placed on the non-return plate.

Further, one side of the movable groove, which is abutted against the non-return plate, is an arc surface.

Further, the grounding contact is provided with a bump, and the bump is positioned at the bottom of the abutting end of the non-return plate.

Further, the non-return plate is provided with an adapting groove, and the adapting groove is adapted to the grounding rod and is placed at one end of the non-return plate.

Further, the grounding assembly also includes a grounding switch disposed on a side of the ground contact remote from the ground rod.

Further, the isolating switch comprises a support, a first insulator and a second insulator are respectively arranged on two sides of the top of the support, a first fixed contact and a second fixed contact are respectively arranged on the top of the first insulator and the top of the second insulator, and one end of the isolating baffle is hinged to the second fixed contact.

Further, the support is rotatably provided with a rotating shaft, a transmission plate is arranged outside the rotating shaft, and a third insulator with one end hinged with the isolation baffle is hinged to the transmission plate.

The technical scheme provided by the application has the beneficial effects that:

This anti-creeping grounding device of cubical switchboard has simplified the operating mechanism of traditional isolator and earthing knife-switch, realizes the closure of earthing knife-switch through the motion that directly utilizes isolation baffle disconnection process, has avoided carrying out the great problem of moment that secondary transmission brought through connecting rod and auxiliary shaft in the traditional design.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an anti-creeping grounding apparatus for a switchgear of the present utility model;

FIG. 2 is an exploded view of the anti-creeping grounding of the switchgear of the present utility model;

Fig. 3 is an enlarged partial schematic view of the ground contact of the present utility model.

In the figure, a disconnecting switch 100, a bracket 110, a first insulator 120, a first fixed contact 121, a second insulator 130, a second fixed contact 131, a isolating baffle 132, a rotating shaft 140, a driving plate 141 and a third insulator 150 are shown;

200 grounding components, 210 grounding rods, 220 grounding contacts, 221 movable grooves, 222 non-return plates, 222a adapting grooves, 223 convex blocks and 230 grounding knife switches.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, an anti-leakage grounding device of a switch cabinet comprises a disconnecting switch 100 and a grounding assembly 200, wherein the disconnecting switch 100 is provided with a disconnecting baffle 132, the grounding assembly 200 comprises a grounding rod 210 and a grounding contact 220, a movable groove 221 is formed in the grounding contact 220, a non-return plate 222 which is positioned in the movable groove 221 and one end of which abuts against one side of the movable groove 221 is hinged to the grounding contact 220, one end of the grounding rod 210 is fixedly connected with the disconnecting baffle 132, and the other end of the grounding rod extends into the movable groove 221 and is placed on the non-return plate 222.

By directly connecting the isolation barrier 132 to the ground rod 210, the process is simplified, reducing the complex mechanical structures such as connecting rods and secondary shafts required in conventional designs. Because the action of the isolation barrier 132 directly drives the grounding rod 210, intermediate transmission links are reduced, thereby reducing the moment required during operation and making the operation easier.

When the isolation barrier 132 is actuated, the grounding rod 210 moves therewith. One end of the grounding rod 210 slides into the movable groove 221 from the bottom of the movable groove 221, in the process, the end of the grounding rod 210 pushes the non-return plate 22 to turn over until the turned over gap is enough for separating the end of the grounding rod 210 from the non-return plate 222, and then the non-return plate 222 reversely rotates by gravity and is abutted against one side of the movable groove 221 again to finish grounding closure.

In some embodiments, the ground contact 220 is provided with a bump 223, and the bump 223 is located at the bottom of the abutting end of the non-return plate 222.

The contact of the protrusions 223 with the non-return plate 222 may provide additional support, enhancing the stability of the contact between the ground rod 210 and the non-return plate 222. This stability is to ensure that the ground rod 210 is reliably contacted when closed with the ground contact 220. The backstop 222 is generally designed to provide a physical barrier against movement of the ground rod 210 in the opposite direction within the movable slot 221. This design ensures one-way movement of the grounding bar 210 when closing the grounding contacts 220, preventing possible mishandling or accidental reverse movement, thereby ensuring the safety of the grounding operation.

The action of the grounding rod 210 acts on the non-return plate 222 to enable the non-return plate 222 to tilt and separate from the protruding block 223, when the non-return plate 222 is reset by gravity, the non-return plate 222 falls on the protruding block 223 again to enable the non-return plate to contact with the bottom of the non-return plate 222, and the non-return plate 222 plays a non-return role in the movable groove 221 to prevent the grounding rod 210 from moving reversely in the closing process.

In some embodiments, the non-return plate 222 is provided with an adapting groove 222a, and the adapting groove 222a is adapted to the grounding rod 210 and is placed on one end of the non-return plate 222.

The mating slot 222a provides an accurate placement location for the grounding bar 210, ensuring proper alignment of the grounding bar 210 in the movable slot 221. This helps to improve the accuracy of the grounding operation, ensures that the grounding rod 210 can smoothly contact the ground contact 220, and achieves effective grounding. The design of the mating groove 222a helps to reduce friction as the grounding bar 210 moves within the movable groove 221 because it provides a smooth contact surface for the grounding bar 210. This reduces wear and extends the useful life of the grounding rod 210 and the backstop 222.

When the non-return plate 222 falls onto the protruding block 223 again, the action of the isolation baffle 132 is stopped, and then the grounding rod 210 stops acting, so that the isolation baffle 132 and the grounding rod 210 may move reversely under the action of gravity, and when the grounding rod 210 moves reversely and contacts the non-return plate 222, the outer side of the grounding rod 210 is just adapted to the adapting groove 222a, so that the structural stability between the non-return plate 222 and the grounding rod 210 is enhanced, and the grounding rod 210 is ensured not to deviate from the preset position due to accidental movement during the grounding operation.

In some embodiments, the grounding assembly 200 further includes a grounding switch 230 disposed on a side of the grounding contact 220 remote from the grounding bar 210.

The presence of the ground blade 230 ensures a well-defined ground path between the ground bar 210 and the ground contact 220. This allows current to safely flow to the ground in the event of a fault, protecting equipment and personnel safety. The side of the ground blade 230 remote from the ground contact 220 may be connected to ground by a ground wire such that the ground wire provides a complete ground path to direct current to ground when the ground rod 210 is moved to the ground contact 220 and the ground blade is closed.

In some embodiments, the isolating switch 100 includes a bracket 110, two sides of the top of the bracket 110 are respectively provided with a first insulator 120 and a second insulator 130, the tops of the first insulator 120 and the second insulator 130 are respectively provided with a first fixed contact 121 and a second fixed contact 131, and one end of the isolating baffle 132 is hinged to the second fixed contact 131.

The disconnector 100 is part of an overall switchgear anti-creeping grounding comprising a bracket 110, the bracket 110 being the main structure of the disconnector 100 for supporting and securing other components. Insulators are components used in electrical power systems to isolate conductive portions (e.g., isolation barrier 132) from non-conductive portions (e.g., bracket 110) to ensure operational safety and to prevent current leakage. The stationary contacts are conductive portions of the disconnector 100 that contact the moving contacts when the switch is closed, forming a conductive path. The isolation barrier 132 is an important component of the isolation switch and functions to physically isolate the stationary contact from current flow when the switch is open. One end of the isolation barrier 132 is hinged to the second stationary contact 131, which means that the isolation barrier 132 can be separated from the first stationary contact 121 by rotation, thereby achieving the disconnection of the isolation switch 100.

In some embodiments, a side of the movable groove 221 abutting against the non-return plate 222 is a cambered surface. The center of the cambered surface and the swing center of the isolation baffle 132 are the same center point.

The center of the cambered surface and the center of the swing center of the isolation baffle 132 are the same center point, which means that the rotation motion of the isolation baffle 132 can be accurately transmitted to the grounding rod 210, and the movement of the grounding rod 210 in the movable groove 222 is ensured to be synchronous with the swing of the isolation baffle 132, so that the accuracy of the grounding operation is ensured.

In some embodiments, the support 110 is rotatably provided with a rotating shaft 140, a driving plate 141 is disposed outside the rotating shaft 140, and a third insulator 150 with one end hinged to the isolation baffle 132 is hinged to the driving plate 141.

The rotation of the isolation barrier 132 can be achieved by providing a rotating shaft 140 on the bracket 110. This design generally provides a high transmission efficiency, ensuring that the operating torque is effectively transferred to the isolation barrier 132. The presence of the driving plate 141 allows an operator to apply power to the third insulator 150 through the driving plate 141 by rotating the rotating shaft 140, so as to control the opening and closing of the isolation barrier 132.

When the operator needs to turn off the disconnector 100, they turn the spindle 140 on the stand. The rotation of the rotation shaft transmits a moment through the transmission plate 141 so that the third insulator 150 hinged to the isolation barrier 132 rotates accordingly. As the third insulator 150 rotates, the isolation barrier 132 rotates accordingly. When the isolation barrier 132 rotates to a certain position, it is separated from the first stationary contact 121, so that the isolation switch 100 is turned off.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The anti-leakage grounding device for the switch cabinet comprises a disconnecting switch (100) and a grounding assembly (200) and is characterized in that the disconnecting switch (100) is provided with a disconnecting baffle (132), the grounding assembly (200) comprises a grounding rod (210) and a grounding contact (220), a movable groove (221) is formed in the grounding contact (220), a non-return plate (222) which is arranged in the movable groove (221) in a hinged mode and one end of which abuts against one side of the movable groove (221) is hinged to the grounding contact (220), one end of the grounding rod (210) is fixedly connected with the disconnecting baffle (132), and the other end of the grounding rod extends into the movable groove (221) and is placed on the non-return plate (222).

2. The switchgear anti-creeping grounding device according to claim 1, wherein the side of the movable groove (221) abutting against the non-return plate (222) is an arc surface.

3. The switchgear anti-creeping grounding device according to claim 1, wherein the grounding contact (220) is provided with a bump (223), and the bump (223) is located at the bottom of the abutting end of the non-return plate (222).

4. The switchgear anti-creeping grounding device according to claim 1, wherein the non-return plate (222) is provided with an adapting groove (222 a), and the adapting groove (222 a) is adapted to the grounding rod (210) to be placed on one end of the non-return plate (222).

5. The switchgear anti-creep grounding device according to claim 1, in which the grounding assembly (200) further comprises a grounding switch (230) arranged on the side of the grounding contact (220) remote from the grounding bar (210).

6. The anti-creeping grounding device for the switch cabinet according to claim 1, wherein the isolating switch (100) comprises a bracket (110), a first insulator (120) and a second insulator (130) are respectively arranged on two sides of the top of the bracket (110), a first fixed contact (121) and a second fixed contact (131) are respectively arranged on the tops of the first insulator (120) and the second insulator (130), and one end of the isolating baffle (132) is hinged to the second fixed contact (131).

7. The anti-creeping grounding device for a switchgear cabinet according to claim 6, wherein a rotating shaft (140) is rotatably arranged on the bracket (110), a driving plate (141) is arranged outside the rotating shaft (140), and a third insulator (150) with one end hinged with the isolation baffle (132) is hinged on the driving plate (141).