CN219086788U

CN219086788U - Overvoltage protection device

Info

Publication number: CN219086788U
Application number: CN202222553457.8U
Authority: CN
Inventors: 赵施林; 常占宁; 张一平; 刘磊; 刘景�; 王冬青
Original assignee: China Railway Lanzhou Group Co Ltd
Current assignee: China Railway Lanzhou Group Co Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-05-26
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses an overvoltage protection device, which comprises a cabinet body, a drawing plate and a protection mechanism, wherein the drawing plate is arranged on the cabinet body through a connecting part and is in an L shape, the inner wall of the drawing plate is fixedly connected with a damping plate, more than two connecting holes are formed in the inner wall of the damping plate, more than two clamping columns are arranged in the inner walls of a protector body and a circuit breaker body, and the clamping columns are the same in number and opposite in position to the connecting holes; a supporting plate is fixedly connected to one side surface of the shock absorption plate below the connecting hole; the connecting part comprises a positioning hole arranged on one side surface of the cabinet body and a positioning pin arranged on the inner wall of the drawing plate, and the positioning pin is arranged on the inner wall of the positioning hole; the top inner wall and the bottom inner wall of the cabinet body are respectively provided with a sliding groove, and the drawing plate is connected to the inner wall of the sliding groove in a sliding way through a sliding block; the top outer wall and the bottom outer wall of the cabinet body are fixedly connected with connecting pieces. The dismounting protection mechanism is quick and convenient, and the overhauling and replacing efficiency is improved.

Description

Overvoltage protection device

Technical Field

The utility model relates to the technical field of overvoltage protection, in particular to an overvoltage protection device.

Background

With rapid development of railway transportation and electrified railway, railway locomotives (i.e., electric locomotives) which extract electric power from the outside as energy source for driving are widely used. The electric locomotive mainly depends on traction and power supply functions of a traction power supply system to realize normal and safe operation, the traction power supply system mainly comprises a traction substation and a contact net, the traction substation utilizes traction functions of equipment in a traction substation to send alternating current sent from a power plant output through a high-voltage transmission line to a contact net above a railway, and the contact net directly transmits electric energy to the electric locomotive. However, the voltage transmitted by the overhead line system is unstable, the situation that the voltage is too high and too low or the voltage contains higher harmonic components often occurs, if the voltage output by the overhead line system is too high and exceeds the load capacity of the UPS, the UPS is possibly damaged, and even the equipment in the traction substation is burnt out. Based on this, overvoltage protection devices for railway catenary have been developed.

Because the contact net is outdoor to the environment is complicated, generally inlays overvoltage protection device body in the wall body through the bolt during the installation, but if the voltage protection device body appears damaging, maintenance personal need demolish it through the instrument, comparatively waste time and energy.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides an overvoltage protection device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the overvoltage protection device comprises a cabinet body, a drawing plate which is arranged on the cabinet body through a connecting part and is L-shaped, and a protection mechanism, wherein the inner wall of the drawing plate is fixedly connected with a damping plate, more than two connecting holes are formed in the inner wall of the damping plate, more than two clamping columns are arranged on the inner walls of a protector body and a circuit breaker body, and the clamping columns are the same in number and opposite in position to the connecting holes;

and a supporting plate is fixedly connected to one side surface of the shock absorption plate below the connecting hole.

As still further aspects of the utility model: the connecting portion comprises a positioning hole arranged on one side face of the cabinet body, a positioning pin arranged on the inner wall of the drawing plate, and the positioning pin is arranged on the inner wall of the positioning hole.

As still further aspects of the utility model: the top inner wall and the bottom inner wall of the cabinet body are both provided with sliding grooves, and the drawing plate is connected to the inner wall of the sliding grooves in a sliding manner through sliding blocks.

As still further aspects of the utility model: the top outer wall and the bottom outer wall of the cabinet body are fixedly connected with connecting pieces.

As still further aspects of the utility model: the cabinet body and the opposite side of pull board all are provided with the thermovent, and the cabinet body of leaning against the thermovent and the equal fixedly connected with baffle of pull board one side inner wall, the equal fixedly connected with dustproof ventilative board of both sides face of baffle.

As still further aspects of the utility model: a side surface of the cabinet body is fixedly connected with an anti-slip strip;

and one side surface of the drawing plate is fixedly connected with an illuminating lamp.

As still further aspects of the utility model: the top outer wall fixedly connected with arrester of the cabinet body.

As still further aspects of the utility model: the protection mechanism consists of a protector body and a breaker body; the protector body comprises a voltage comparator, a voltmeter and a capacitor; the breaker body includes a leakage protector and an air circuit breaker.

Compared with the prior art, the utility model provides an overvoltage protection device, which has the following beneficial effects:

1. according to the overvoltage protection device, after the clamping column is inserted into the protection mechanism, the clamping column is inserted into the corresponding connecting hole, so that the protection mechanism is quickly installed on the drawing plate; on the contrary, one hand holds the protection mechanism, and the other hand pulls out the clamping column on the protection mechanism from the connecting hole for the protection mechanism is separated with the pull plate, and dismouting protection mechanism is quick and convenient, improves the efficiency of maintenance change.

2. This overvoltage protection device, through being provided with structures such as connecting portion, utilize the locating pin on the rotatory pull board of instrument, make its one end break away from the locating hole gradually, then hand press antislip strip and simultaneously pull the pull board outward, make it take out in the cabinet body through the spout to take protection machanism completely out, easy dismounting and spending time are short.

3. This overvoltage protection device, outside air current gets into the within range of baffle through the thermovent, gets into the cabinet body after passing dustproof ventilative board promptly from the both sides of baffle again, can avoid outside rainwater to get into the cabinet body through the baffle, can prevent simultaneously that dust etc. from getting into the cabinet body through dustproof ventilative board, has avoided the condition that leads to circuit element damage because of the internal portion high temperature of cabinet moreover.

Drawings

Fig. 1 is a schematic diagram of a front view structure of an overvoltage protection device according to the present utility model;

FIG. 2 is a schematic diagram illustrating a back view of an overvoltage protection device according to the present utility model;

FIG. 3 is a schematic diagram illustrating a front view of an overvoltage protection device according to the present utility model;

fig. 4 is a schematic diagram of an explosion structure of a protection mechanism and a pull plate of an overvoltage protection device according to the present utility model.

In the figure: 1-cabinet body, 2-pull board, 3-thermovent, 4-connecting piece, 5-arrester, 6-antislip strip, 7-shock attenuation board, 8-spout, 9-dustproof ventilative board, 10-baffle, 11-locating hole, 12-warning light, 13-layer board, 14-locating pin, 15-card post, 16-connecting hole, 17-light, 100-protector body, 110-circuit breaker body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

In order to perform overvoltage protection on a circuit, as shown in fig. 1 and 3, the overvoltage protection device comprises a cabinet body 1, an L-shaped drawing plate 2 arranged on the cabinet body 1 through a connecting part, and a protection mechanism for overvoltage protection, wherein the protection mechanism consists of a protector body 100 and a breaker body 110, and the protector body 100 comprises a voltage comparator for comparing an input voltage signal with a reference voltage signal, a voltmeter for testing the voltage of the circuit, and a capacitor; during the use period, if the voltage comparator detects that the input voltage signal value of the circuit is larger than the reference voltage signal value, the overvoltage can be judged, the capacitor directly stores charges for the overvoltage circuit, the effect of reducing the overvoltage peak value is achieved, and the voltage comparator is matched with the voltmeter, so that people can know the voltage change of the circuit.

Preferably, the voltage comparator, voltmeter, capacitor, leakage protector and air circuit breaker all refer to the prior art and are not described in detail herein.

Further, the breaker body 110 includes a leakage protector for breaking the circuit and an air circuit breaker for breaking the circuit having a current exceeding a rated current; the breaker body 110 controls the circuit to be powered off according to the overvoltage condition detected by the protector body 100, so as to avoid the condition of circuit damage.

Further, a lightning arrester 5 for preventing lightning strike and improving the safety of the protection mechanism is fixed on the outer wall of the top of the cabinet body 1 through bolts;

still further, the top outer wall and the bottom outer wall of the cabinet body 1 are both fixed with a connecting piece 4 through bolts; the cabinet 1 is firmly fixed on the installation structure surface through the connecting piece 4 and the external bolts.

In order to facilitate the maintenance of the working state of the protection mechanism, as shown in fig. 2-3, the connecting part comprises a positioning hole 11 formed in one side surface of the cabinet body 1 and a positioning pin 14 inserted into the inner wall of the drawing plate 2, and the positioning pin 14 is connected to the inner wall of the positioning hole 11 through threads;

furthermore, the inner walls of the top and the bottom of the cabinet body 1 are provided with sliding grooves 8, and the drawing plate 2 is connected to the inner walls of the sliding grooves 8 in a sliding manner through sliding blocks;

preferably, an anti-slip strip 6 which is convenient for moving the drawing plate 2 is welded on one side surface of the cabinet body 1; when the cabinet body 1 needs to be opened, the locating pin 14 on the pull plate 2 is rotated by a tool, one end of the locating pin is gradually separated from the locating hole 11, then the pull plate 2 is pulled out from the cabinet body 1 through the sliding groove 8 by hand pressing the anti-slip strip 6, so that the protection mechanism is completely taken out, and the anti-slip device is convenient to assemble and disassemble and takes a short time.

In order to facilitate the disassembly and assembly of the protection mechanism, as shown in fig. 2 and 4, the inner wall of the pull plate 2 is fixedly connected with a shock absorbing plate 7, a plurality of connecting holes 16 are formed in the inner wall of the shock absorbing plate 7, a plurality of clamping columns 15 are inserted into the inner walls of the protector body 100 and the breaker body 110, and the clamping columns 15 are the same in number and opposite in position to the connecting holes 16; after the clamping column 15 is inserted on the protection mechanism, the clamping column is inserted into the corresponding connecting hole 16, so that the protection mechanism is quickly installed on the drawing plate 2, the dismounting is quick, and the overhauling and replacing efficiency is improved.

Further, a supporting plate 13 for supporting the protection mechanism is fixed on one side surface of the shock absorbing plate 7 below the connecting hole 16 through bolts; the use stability of the protection mechanism is improved.

Still further, a lighting lamp 17 for improving the brightness of the interior of the cabinet 1 is fixed on one side surface of the drawing plate 2 through bolts.

Working principle: during installation, the cabinet body 1 is firmly fixed on the installation structure surface through the connecting piece 4 and the external bolts. During the use period, if the voltage comparator detects that the input voltage signal value of the circuit is larger than the reference voltage signal value, the overvoltage can be judged, the capacitor directly stores charges for the overvoltage circuit, the overvoltage peak value is reduced, the circuit breaker body 110 controls the circuit to be powered off, and the circuit breaker body is matched with a voltmeter so as to facilitate people to know the voltage change of the circuit. When the protection mechanism is to be overhauled, people only need to rotate the positioning pin 14 on the pull plate 2 by using a tool to gradually separate one end of the positioning pin from the positioning hole 11, then press the anti-slip strip 6 by hand and pull the pull plate 2 outwards at the same time, so that the anti-slip strip is pulled out of the cabinet body 1 through the sliding groove 8, and the protection mechanism is completely taken out; then, one hand holds the protection mechanism, and the other hand pulls out the clamping column 15 on the protection mechanism from the connecting hole 16, so that the protection mechanism is separated from the drawing plate 2, the disassembly and the assembly are rapid and convenient, and the overhaul and replacement efficiency is improved.

Example 2

An overvoltage protection device, as shown in fig. 1-2, for ensuring the heat dissipation effect of equipment; the present example was modified on the basis of example 1 as follows: the cabinet body 1 and the opposite side surfaces of the drawing plate 2 are respectively provided with a heat radiation opening 3, the inner walls of one side of the cabinet body 1 and one side of the drawing plate 2, which are back to the heat radiation openings 3, are respectively fixed with a baffle 10 through bolts, and the two side surfaces of the baffle 10 are respectively fixed with a dustproof ventilation plate 9 through bolts; make things convenient for inside and outside air of cabinet body 1 to exchange through thermovent 3, specific: outside air current gets into the within range of baffle 10 through thermovent 3, gets into the cabinet body 1 after passing dustproof breather plate 9 from the both sides of baffle 10 promptly again, can avoid outside rainwater to get into the cabinet body 1 through baffle 10, can prevent simultaneously that dust etc. from getting into the cabinet body 1 through dustproof breather plate 9, has avoided the condition that leads to circuit element to damage because of the inside high temperature of cabinet body 1 moreover.

Working principle: make things convenient for inside and outside air of cabinet body 1 to exchange through thermovent 3, specific: outside air current gets into the within range of baffle 10 through the thermovent 3, gets into the cabinet body 1 after passing dustproof breather plate 9 from the both sides of baffle 10 promptly again, can avoid outside rainwater to get into the cabinet body 1 through baffle 10, can prevent simultaneously that dust etc. from getting into the cabinet body 1 through dustproof breather plate 9.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The overvoltage protection device comprises a cabinet body (1), a drawing plate (2) which is arranged on the cabinet body (1) through a connecting part and is L-shaped, and a protection mechanism, and is characterized in that the inner wall of the drawing plate (2) is fixedly connected with a damping plate (7), more than two connecting holes (16) are formed in the inner wall of the damping plate (7), more than two clamping columns (15) are formed in the inner walls of a protector body (100) and a circuit breaker body (110), and the clamping columns (15) are the same in number and opposite in position to the connecting holes (16);

a supporting plate (13) is fixedly connected to one side surface of the shock absorbing plate (7) below the connecting hole (16).

2. The overvoltage protection device according to claim 1, wherein the connecting portion comprises a positioning hole (11) formed in a side surface of the cabinet body (1), a positioning pin (14) formed in an inner wall of the pull plate (2), and the positioning pin (14) is formed in an inner wall of the positioning hole (11).

3. An overvoltage protection device according to claim 2, characterized in that the top and bottom inner walls of the cabinet (1) are provided with sliding grooves (8), and the drawing plate (2) is slidably connected to the inner walls of the sliding grooves (8) by sliding blocks.

4. An overvoltage protection device according to claim 3, characterized in that the top and bottom outer walls of the cabinet (1) are fixedly connected with connectors (4).

5. The overvoltage protection device according to claim 1, wherein the opposite side surfaces of the cabinet body (1) and the pull plate (2) are respectively provided with a heat radiation opening (3), the inner walls of one side of the cabinet body (1) and one side of the pull plate (2) which are back to the heat radiation opening (3) are respectively fixedly connected with a baffle plate (10), and two side surfaces of the baffle plate (10) are respectively fixedly connected with a dustproof ventilation plate (9).

6. The overvoltage protection device according to claim 5, wherein an anti-slip strip (6) is fixedly connected to one side of the cabinet (1);

an illuminating lamp (17) is fixedly connected to one side face of the drawing plate (2).

7. Overvoltage protection device according to claim 1, characterized in that the top outer wall of the cabinet (1) is fixedly connected with a lightning arrester (5).

8. An overvoltage protection device according to claim 1, characterized in that the protection mechanism consists of a protector body (100) and a circuit breaker body (110); the protector body (100) comprises a voltage comparator, a voltmeter, and a capacitor; the circuit breaker body (110) includes a leakage protector and an air circuit breaker.