Self-restoring spark gap overvoltage protection device

Abstract

The utility model discloses a self -recovery type spark gap overvoltage protection device relates to overvoltage protection tool technical field, including the protection cover, and the inside installation of protection cover has the ceramic insulation shell, and the outside of ceramic insulation shell is pasted with the inside of protection cover, and the inside installation of ceramic insulation shell has the adjusting mechanism, and ceramic insulation shell's inside both sides all install the pressure -reducing mechanism, the utility model discloses the cooperation of two -way screw rod and insulating guide rod, the interval of conductive electrode plate is controlled conveniently, and the breakdown voltage size of adjusting device is convenient, through the cooperation of buffer board and spring, the buffer board moves outward and reduces the pressure to the inside when the inside inert gas expands, and it is convenient to prevent the device from damaging due to the pressure expansion in the inside, through above -mentioned structure has solved the problem that the existing spark gap overvoltage protection device can only select the device that meets with the protected device's working voltage and installs according to it when using, and cannot adjust the breakdown voltage of device.

Description

Technical Field

[0001] This utility model relates to the technical field of overvoltage protection devices, and in particular to a self-resetting spark gap overvoltage protection device. Background Technology

[0002] Self-resetting spark gap overvoltage protection devices are key equipment for overvoltage protection in power systems, mainly used in transmission lines, substations, and electrified railways. They achieve maintenance-free repetitive protection, effectively solving the reliability problem of transient overvoltage protection in power systems and providing important guarantees for the safe operation of modern power grids. Existing spark gap overvoltage protection devices generally achieve overvoltage protection by fixing conductive electrode plates at both ends inside an insulating ceramic shell and filling it with inert gas. However, this structure results in a fixed breakdown voltage because the electrode plates are fixed and the spacing cannot be adjusted. Since the upper limit of the operating voltage of the devices to be protected varies, the selection of devices must be based on the device data, causing complexity in use. Therefore, the above-mentioned problems need to be improved. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-resetting spark gap overvoltage protection device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a self-resetting spark gap overvoltage protection device, comprising a protective sleeve, wherein a ceramic insulating shell is installed inside the protective sleeve, the outer side of the ceramic insulating shell is attached to the inside of the protective sleeve, and multiple vent holes are opened on both sides of the protective sleeve and the ceramic insulating shell, an adjustment mechanism is installed inside the ceramic insulating shell, and a pressure reduction mechanism is installed on both sides of the inside of the ceramic insulating shell.

[0005] Preferably, the ceramic insulating shell has annular mounting grooves on both sides of its inner wall, and connection ports on both sides of the ceramic insulating shell. The connection ports are threaded, and a connecting block is threaded into each connection port. A conductive wire is connected to the connecting block.

[0006] Preferably, the conductive wire consists of an outer insulating layer and an inner copper wire. Each adjacent side of the copper wire is connected to a conductive electrode plate, and each adjacent side of the conductive electrode plate is equipped with multiple guide posts. Each adjacent side of the guide posts is conical.

[0007] Preferably, the adjustment mechanism includes a bidirectional lead screw and an insulating guide rod installed at both ends inside the ceramic insulating shell. The insulating guide rod is fixedly connected to the ceramic insulating shell, and both sides of the bidirectional lead screw are rotatably connected to the ceramic insulating shell through insulating bearings.

[0008] Preferably, a plurality of sealing gaskets are equidistantly installed on one side of the bidirectional lead screw, and a sealing groove is formed on the ceramic insulating shell in conjunction with the sealing gaskets. A rotating wheel is installed at one end of the bidirectional lead screw, and the conductive electrode plates are threadedly connected to both sides of the bidirectional lead screw. The other end of each conductive electrode plate slides on an insulating guide rod.

[0009] Preferably, the pressure relief mechanism includes a spring installed in the mounting groove, one end of the spring is fixedly connected to a buffer plate, the outer circumferential of the buffer plate is provided with an annular guide groove, a wear-resistant sealing ring is installed in the guide groove, and a limit groove is provided on the inner side of the buffer plate, a portion of the sealing ring is installed in the limit groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the cooperation between the bidirectional lead screw and the insulating guide rod facilitates the control of the spacing of the conductive electrode plates and the adjustment of the breakdown voltage of the device; the cooperation between the buffer plate and the spring facilitates the outward movement of the buffer plate to reduce internal pressure when the internal inert gas expands; it also helps to prevent the device from being damaged due to the expansion of internal pressure. The above structure solves the problem that existing spark gap overvoltage protection devices can only be installed according to the working voltage of the protected device, and cannot adjust the breakdown voltage of the device. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the overall structure proposed in this utility model from another perspective;

[0014] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0015] Figure 4 This is a three-dimensional schematic diagram of the adjustment mechanism proposed in this utility model;

[0016] Figure 5 This is a three-dimensional schematic diagram of the pressure-reducing mechanism proposed in this utility model.

[0017] The numbers in the diagram are: 1. Protective sleeve; 2. Ceramic insulating shell; 3. Bidirectional lead screw; 4. Spring; 5. Buffer plate; 6. Conductive electrode plate; 7. Guide post; 8. Conductive wire; 9. Connecting block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-5 The self-resetting spark gap overvoltage protection device of this utility model includes a protective sleeve 1, inside which a ceramic insulating shell 2 is installed. The outer side of the ceramic insulating shell 2 is attached to the inside of the protective sleeve 1. Multiple vent holes are opened on both sides of the protective sleeve 1 and the ceramic insulating shell 2. An adjustment mechanism is installed inside the ceramic insulating shell 2, and a pressure reducing mechanism is installed on both sides of the inner wall of the ceramic insulating shell 2. The adjustment mechanism and the pressure reducing mechanism facilitate the adjustment and protection of the breakdown voltage of the device. Annular mounting grooves are opened on both sides of the inner wall of the ceramic insulating shell 2, and connection ports are opened on both sides of the ceramic insulating shell 2. Threads are opened in the connection ports, and connection blocks 9 are threaded into each connection port. Conductive wires 8 are connected to the connection blocks 9, facilitating the connection of the device to the protected electrical appliance through the conductive wires 8. The conductive wires 8 consist of an outer insulating layer and an inner copper wire. Conductive electrode plates 6 are connected to the adjacent sides of the copper wires. Multiple guide posts 7 are installed on the adjacent sides of the conductive electrode plates 6. The adjacent sides of the guide posts 7 are conical, facilitating the concentration of electrons at the tips to generate tip discharge.

[0020] In this utility model, the adjustment mechanism includes a bidirectional lead screw 3 and an insulating guide rod installed at both ends inside the ceramic insulating shell 2. The insulating guide rod is fixedly connected to the ceramic insulating shell 2, and both sides of the bidirectional lead screw 3 are rotatably connected to the ceramic insulating shell 2. Multiple sealing gaskets are equidistantly installed on one side of the bidirectional lead screw 3. The ceramic insulating shell 2 has a sealing groove to cooperate with the sealing gaskets. A rotating wheel is installed at one end of the bidirectional lead screw 3. The conductive electrode plates 6 are threadedly connected to both sides of the bidirectional lead screw 3. The other ends of the conductive electrode plates 6 are placed on the insulating guide rod and slide. The bidirectional lead screw 3 facilitates the adjustment of the spacing of the conductive electrode plates 6, thereby adjusting the breakdown voltage. The bidirectional lead screw 3 is made of insulating material. A conductive isolation sleeve is provided at the threaded connection between the conductive electrode plates 6 and the bidirectional lead screw 3. The pressure reduction mechanism includes a spring 4 installed in the mounting groove. A buffer plate 5 is fixedly connected to one end of the spring 4. An annular guide groove is opened on the outer circumference of the buffer plate 5. A wear-resistant sealing ring is installed in the guide groove. A limit groove is opened on the inner side of the buffer plate 5. Part of the sealing ring is installed in the limit groove. The buffer plate 5 facilitates the protection of the device from high voltage damage.

[0021] Working principle: When using this utility model, first connect the conductive wires 8 on both sides of the device to the positive and negative poles of the device to be protected. Then, adjust the distance between the two conductive electrode plates 6 by rotating the bidirectional screw 3 according to the highest working voltage of the protection device, thereby adjusting the breakdown voltage of the device. When encountering situations such as lightning strikes that cause high voltage in the line, a large number of electrons accumulated at the tip of the negative pole guide post 7 will break down the insulating inert body inside the device, thereby limiting the overvoltage and protecting the device. When an overvoltage occurs, the electric spark generated inside the device causes high temperature, which in turn causes the inert gas to expand, squeezing the buffer plate 5 to move outward, thereby playing a buffering function and preventing damage to the device.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-resetting spark gap overvoltage protection device, comprising a protective sleeve (1), characterized in that: The protective sleeve (1) has a ceramic insulating shell (2) installed inside. The outer side of the ceramic insulating shell (2) is attached to the inside of the protective sleeve (1). The protective sleeve (1) and the ceramic insulating shell (2) have multiple ventilation holes on both sides. The ceramic insulating shell (2) has an adjustment mechanism installed inside. The ceramic insulating shell (2) has a pressure reducing mechanism installed on both sides inside. The ceramic insulating shell (2) has an annular mounting groove on both sides of its inner wall and a connection port on both sides.

2. The self-resetting spark gap overvoltage protection device according to claim 1, characterized in that: The connection port is threaded, and each connection port is threaded with a connecting block (9), and a conductive wire (8) is connected to the connecting block (9).

3. The self-resetting spark gap overvoltage protection device according to claim 2, characterized in that: The conductive wire (8) consists of an outer insulating layer and an inner copper wire. Each copper wire is connected to a conductive electrode plate (6) on a similar side. Each conductive electrode plate (6) is equipped with a plurality of guide posts (7) on a similar side. Each guide post (7) is conical on a similar side.

4. The self-resetting spark gap overvoltage protection device according to claim 1, characterized in that: The adjustment mechanism includes a bidirectional lead screw (3) and an insulating guide rod installed at both ends inside the ceramic insulating shell (2). The insulating guide rod is fixedly connected to the ceramic insulating shell (2). Both sides of the bidirectional lead screw (3) are rotatably connected to the ceramic insulating shell (2), and both sides of the bidirectional lead screw (3) are rotatably connected to the ceramic insulating shell (2) through insulating bearings.

5. The self-resetting spark gap overvoltage protection device according to claim 4, characterized in that: Multiple sealing gaskets are equidistantly installed on one side of the bidirectional lead screw (3). The ceramic insulating shell (2) is provided with a sealing groove in cooperation with the sealing gaskets. A rotating wheel is installed at one end of the bidirectional lead screw (3). The conductive electrode plates (6) are threadedly connected to both sides of the bidirectional lead screw (3). The other end of the conductive electrode plates (6) is placed on the insulating guide rod and slides.

6. The self-resetting spark gap overvoltage protection device according to claim 1, characterized in that: The pressure relief mechanism includes a spring (4) installed in the mounting groove. One end of the spring (4) is fixedly connected to a buffer plate (5). An annular guide groove is provided on the outer circumference of the buffer plate (5). A wear-resistant sealing ring is installed in the guide groove. A limit groove is provided on the inner side of the buffer plate (5). A portion of the sealing ring is installed in the limit groove.

Images