A protection device for distribution switch

Abstract

The utility model discloses a protective device for distribution switch relates to protective technical field for distribution switch, including two insulators, the insulator is installed with base, the base is connected with push rod, the push rod is connected with the conductive frame, the base is installed with two limit rods, the other insulator is installed with slide rail seat, the slide rail seat is installed with static contact block and arc extinguishing mechanism, the static contact block one side is equipped with buffer mechanism, the slide rail seat contacts and has electric contact block, electric contact block is connected with the conductive rod, the conductive rod outside is equipped with spring no.

Description

Technical Field

[0001] This utility model relates to the field of protection technology for power distribution switches, specifically a protection device for power distribution switches. Background Technology

[0002] A power distribution switch is an electrical device used in a power distribution system to connect or disconnect circuits or change the circuit connection method. Power distribution switches can manually or automatically close or open circuits as needed. For example, when a power outage is required for maintenance in a certain area, the power supply can be cut off by operating the power distribution switch to ensure the safety of maintenance personnel. High-voltage disconnect switches are a widely used type of switching equipment in electrical systems. High-voltage disconnect switches mainly consist of conductive parts, insulating parts, transmission parts, and operating mechanisms.

[0003] In remote and rural power transmission projects, high-voltage disconnect switches are often installed on insulators on utility poles to control the connection and disconnection of a specific circuit. These switches provide a clear point of disconnection for future maintenance. During maintenance, disconnecting the switch generates an electric arc. Workers often use a long insulated rod, hooking the switch contacts with a hook at the end, and pushing or pulling to open or close the circuit. However, the instantaneous opening and closing of the high-voltage disconnect switch generates an electric arc. When manually operating the long rod remotely, excessive or uneven force is often applied, leading to instability and a prolonged arc generation time. Over time, the high temperature generated by the arc gradually melts the metal on the contact surface, making it rough and uneven, reducing contact performance, shortening equipment lifespan, and in severe cases, even causing the contacts to stick together, preventing the switch from opening and closing properly, damaging electrical equipment, causing short circuits, and even fires. Therefore, we propose a protective device for distribution switches. Utility Model Content

[0004] The purpose of this invention is to provide a protective device for power distribution switches to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a protective device for a power distribution switch, comprising two insulators, a base fixedly mounted on each insulator, a push rod rotatably connected to the base, a conductive frame fixedly connected to the push rod, two limiting rods fixedly mounted on the base, a slide rail fixedly mounted on the other insulator, a stationary contact block fixedly mounted on one side of the slide rail, a buffer mechanism provided on one side of the stationary contact block, an electrical contact block slidably contacted by the slide rail, a conductive rod fixedly connected to the electrical contact block, a spring provided on the outer side of the conductive rod, the conductive rod and the conductive frame making slidable contact, and an arc-extinguishing mechanism fixedly mounted on the slide rail.

[0006] Preferably, an arc-extinguishing cover is fixedly installed on the slide rail base, and an arc-extinguishing grid is also fixedly installed on the slide rail base. The arc-extinguishing cover and the arc-extinguishing grid together constitute an arc-extinguishing mechanism.

[0007] Preferably, the arc-extinguishing grid has a group of square holes, and adjacent square holes on the arc-extinguishing grid are staggered with each other.

[0008] Preferably, the electrical contact block is rotatably connected to a ring, and the ring and the slide rail seat are in rolling contact.

[0009] Preferably, the slide rail seat is fixedly connected to two springs, and each of the two springs is fixedly connected to a buffer block. The two springs and the two buffer blocks together constitute a buffer mechanism.

[0010] Preferably, both the base and the slide rail are made of insulating material.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model utilizes the storage and release of elastic potential energy by a spring, which enables the conductive rod and electrical contact block to rotate rapidly, quickly breaking the circuit. This avoids the problem of slow manual circuit breaking, which leads to a long arc duration and reduces the damage of the arc to the equipment.

[0013] 2. This utility model incorporates an arc-extinguishing mechanism. When the electrical contact and stationary contact separate and generate an arc, the arc-extinguishing grid absorbs the arc and divides it into multiple small arc segments. Simultaneously, the square hole group enhances heat dissipation and blocks the spread of small arcs. The staggered arrangement of the holes above adjacent grid plates increases the arc induction distance and accelerates arc extinguishing.

[0014] 3. This utility model can buffer the impact force through a buffer mechanism before the electric contact block is about to contact the stationary contact block, thus protecting the equipment from impact damage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall half-section structure of this utility model;

[0016] Figure 2 This is an exploded view of part of the arc-extinguishing grid structure of this utility model;

[0017] Figure 3 This is an enlarged schematic diagram of a partial structure of this utility model.

[0018] In the diagram: 1-Insulator; 2-Base; 3-Push rod; 4-Conductive frame; 5-Limit rod; 6-Slide rail seat; 7-Static contact block; 8-Buffer mechanism; 9-Electrical contact block; 10-Ring; 11-Conductive rod; 12-Spring 1; 13-Arc extinguishing mechanism; 81-Spring 2; 82-Buffer block; 131-Arc extinguishing cover; 132-Arc extinguishing grid; 133-Square hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a protective device for a power distribution switch, including two insulators 1, a base 2 fixedly mounted on the insulators 1, the base 2 being made of insulating material, a push rod 3 rotatably connected to the base 2, one end of the push rod 3 having a round hole for power workers to use a hook attached to one end of a long rod to push and pull, two limiting rods 5 fixedly mounted on the base 2, the two limiting rods 5 being used to limit the on / off position of the push rod 3, a conductive frame 4 fixedly connected to the push rod 3, a conductive round rod connected to the inner side of the conductive frame 4, a conductive rod 11 on one side of the conductive round rod, the conductive rod 11 also having a cylindrical structure, and a square groove on the conductive rod 11, the conductive round rod being able to slide in the square groove to maintain contact with the conductive rod 11, an electrical contact block 9 fixedly connected to the conductive rod 11, and a ring 10 rotatably connected to the electrical contact block 9, the ring 10 and the slide rail seat 6 being connected by a rolling connection. To reduce friction, a spring 12 is provided on the outer side of the conductive rod 11. The spring 12 provides elastic potential energy for the sliding of the conductive rod 11. A slide rail seat 6 is fixedly installed on another insulator 1. The slide rail seat 6 is also made of insulating material. A stationary contact block 7 is fixedly installed on one side of the slide rail seat 6. The stationary contact block 7 is used to contact the electrical contact block 9 to connect the circuit. A buffer mechanism 8 is provided on one side of the stationary contact block 7. The buffer mechanism 8 is composed of two springs 81 and two buffer blocks 82. The two springs 81 are fixedly installed on the side wall of the slide rail seat 6. The two buffer blocks 82 and the two springs 81 are fixedly connected. The buffer mechanism 8 is used to buffer and limit the sliding of the electrical contact block 9. An arc extinguishing mechanism 13 is also fixedly installed on the slide rail seat 6. The arc extinguishing mechanism 13 is composed of an arc extinguishing cover 131 and an arc extinguishing grid 132. Both the arc extinguishing cover 131 and the arc extinguishing grid 132 are fixedly installed on the side wall of the slide rail seat 6.

[0021] Please see Figure 2 The arc-extinguishing grid 132 can divide the electric arc into many small segments. Each grid plate of the arc-extinguishing grid 132 has a set of square holes 133. The set of square holes 133 can better dissipate heat and reduce the time of electric arc diffusion. The set of square holes 133 on adjacent grid plates is staggered to increase the induction distance of the small segment of electric arc when it diffuses on two adjacent grid plates.

[0022] Working principle: When an electrician needs to repair a circuit, the electrician uses a hook to hook the round hole at one end of the push rod 3 and then pulls it forcefully. The push rod 3 will cause the conductive frame 4 to rotate on the base 2. At the same time, the conductive frame 4 compresses the spring 12, and the spring 12 begins to accumulate elastic potential energy. During the rotation, it drives the conductive rod 11 and the electrical contact 9 to rotate. When the central axis of the conductive rod 11 and the push rod 3 coincides, the elastic potential energy of the spring 12 is released instantaneously, pushing the push rod 3 and the conductive rod 11 to rotate rapidly. Under the drive of the conductive rod 11, the electrical contact 9 quickly moves along the slide rail. 6. Slide and release contact with stationary contact block 7 to prevent damage to the equipment caused by prolonged arcing and uneven force due to slow manual circuit breaking. Additionally, the arc generated after contact block 9 separates from stationary contact block 7 is absorbed by arc-extinguishing grid 132 and divided into multiple smaller arc segments by the grid plates. The arc itself has extremely high temperatures; the square holes 133 enhance heat dissipation and block the spread of small arcs. The staggered arrangement of the square holes 133 on adjacent grid plates of arc-extinguishing grid 132 further increases the sensing distance of small arcs, allowing them to be extinguished more quickly. When an electrician needs to reconnect the circuit, they can use a hook to hook the round hole at one end of push rod 3 and push it forcefully, repeating the above movement trajectory. Before contact block 9 contacts stationary contact block 7, it is buffered by buffer mechanism 8 to reduce the impact force.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for a power distribution switch, comprising two insulators (1), characterized in that: A base (2) is fixedly installed on one of the insulators (1), a push rod (3) is rotatably connected to the base (2), a conductive frame (4) is fixedly connected to the push rod (3), two limiting rods (5) are also fixedly installed on the base (2), a slide rail seat (6) is fixedly installed on the other insulator (1), a stationary contact block (7) is fixedly installed on one side of the slide rail seat (6), a buffer mechanism (8) is provided on one side of the stationary contact block (7), an electric contact block (9) is slidably contacted by the slide rail seat (6), a conductive rod (11) is fixedly connected to the electric contact block (9), a spring (12) is provided on the outside of the conductive rod (11), the conductive rod (11) and the conductive frame (4) are in sliding contact, and an arc extinguishing mechanism (13) is also fixedly installed on the slide rail seat (6).

2. The protective device for a power distribution switch according to claim 1, characterized in that: The slide rail seat (6) is fixedly connected to two springs (81), and each of the two springs (81) is fixedly connected to a buffer block (82). The two springs (81) and the two buffer blocks (82) together constitute a buffer mechanism (8).

3. The protective device for a power distribution switch according to claim 1, characterized in that: An arc-extinguishing cover (131) is fixedly installed on the slide rail seat (6), and an arc-extinguishing grid (132) is also fixedly installed on the slide rail seat (6). The arc-extinguishing cover (131) and the arc-extinguishing grid (132) together constitute the arc-extinguishing mechanism (13).

4. A protective device for a power distribution switch according to claim 3, characterized in that: The arc-extinguishing grid (132) has a set of square holes (133), and the adjacent square holes (133) on the arc-extinguishing grid (132) are staggered with each other.

5. A protective device for a power distribution switch according to claim 1, characterized in that: The electrical contact (9) is rotatably connected to a ring (10), and the ring (10) and the slide rail seat (6) are in rolling contact.

6. A protective device for a power distribution switch according to claim 1, characterized in that: The base (2) and slide rail (6) are both made of insulating material.

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