Direct current lightning arrester assembly with discharge action monitoring function

Abstract

The utility model discloses a direct current lightning arrester assembly with a discharge action monitoring function, which comprises an assembly connecting plate, a direct current lightning arrester is fixedly arranged on the top surface of one side of the assembly connecting plate, and a counter protective cover positioning hole is fixedly arranged on the top surface of one side, far away from the direct current lightning arrester, of the assembly connecting plate. A discharge counter is fixedly installed on the inner wall of the counter protective cover positioning hole, the discharge counter is electrically connected with the direct current lightning arrester through a counter connecting bar, and a grounding bolt hole is formed in the top face of the assembly connecting plate and electrically connected with the ground through a second stainless steel bolt and a wire. Relates to the field of direct current lightning arrester assemblies, and the direct current lightning arrester assembly is used for protecting the insulation of a pantograph and a rail transit vehicle from being damaged by lightning overvoltage and operation overvoltage, reducing the running failure rate of the vehicle, ensuring the normal running of the vehicle, and recording the number of discharge actions at the same time.

Description

Technical Field

[0001] The utility model relates to a DC lightning arrester assembly, in particular to a DC lightning arrester assembly with a discharge action monitoring function. Background Art

[0002] Rail transit is a convenient, fast and safe public transportation with the following characteristics: large transportation capacity: the transportation capacity of rail transit far exceeds that of ground public transportation, which can effectively alleviate urban traffic congestion problems, has a fast running speed, and is favored by people for travel. Due to the large carrying capacity and high running speed of rail transit vehicles, it is necessary to maintain the excellent safety protection performance of rail transit vehicles. In order to avoid being struck by lightning, lightning arresters need to be installed on rail transit vehicles to prevent rail transit vehicles from being damaged by lightning or causing panic to passengers. Existing DC lightning arresters generally do not have a discharge action monitoring function. After the rail transit vehicle is struck, the vehicle maintenance personnel cannot know the number of discharges of the lightning arrester and the frequency of statistical overvoltage in the traction system, which is not conducive to further improvement of the overvoltage protection of the traction system.

[0003] In summary, it is necessary to invent a DC lightning arrester assembly with a discharge action monitoring function. Utility Model Content

[0004] The purpose of the utility model is to monitor the number of discharges of the lightning arrester in real time by adding a lightning arrester discharge counter near the lightning arrester. At the same time, in order to facilitate on-site installation, the lightning arrester and the discharge counter are pre-installed on the assembly connecting plate and connected with the connecting plate to form a lightning arrester assembly as a whole. Therefore, the present application provides a DC lightning arrester assembly with a discharge action monitoring function to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A DC lightning arrester assembly with a discharge action monitoring function comprises an assembly connecting plate, the DC lightning arrester is fixedly installed on the top surface of the assembly connecting plate, a counter protective cover positioning hole is fixedly installed on the top surface of the side of the assembly connecting plate away from the DC lightning arrester, a discharge counter is fixedly installed on the inner wall of the counter protective cover positioning hole, the discharge counter is electrically connected to the DC lightning arrester through a connecting bar, a grounding bolt hole is opened on the top surface of the assembly connecting plate, and the grounding bolt hole is electrically connected to the ground through a stainless steel bolt and a wire.

[0007] In a preferred embodiment of the present utility model, a DC lightning arrester positioning hole is opened on the top surface of the assembly connection plate, and three DC lightning arrester positioning holes are provided, and the three DC lightning arrester positioning holes are distributed in a circular array.

[0008] In a preferred embodiment of the utility model, the three DC lightning arrester positioning holes are fixedly connected to the DC lightning arrester base by three stainless steel bolts, and a counter protective cover positioning hole is provided on the top surface of the assembly connecting plate.

[0009] In a preferred embodiment of the present utility model, four counter protection cover positioning holes are provided, and the four counter protection cover positioning holes are distributed in a rectangular shape.

[0010] In a preferred embodiment of the present utility model, the counter protective cover positioning hole inner wall is fixedly connected to the counter protective cover by a stainless steel bolt, and rounded rectangular holes are provided on both the front and rear top surfaces of the assembly connecting plate.

[0011] In a preferred embodiment of the present utility model, the inner wall of the counter protective cover is fixedly mounted with a discharge counter bracket by means of four stainless steel bolts, the discharge counter bracket is configured to be U-shaped, and the discharge counter is fixedly mounted on the inner wall of the discharge counter bracket.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

[0013] The arrester assembly is used to protect the insulation of the pantograph and rail transit vehicles from lightning overvoltage and operating overvoltage damage, reduce the vehicle operation failure rate, ensure the normal operation of the vehicle, and record the number of discharge actions at the same time;

[0014] 2. The arrester uses DC metal oxide resistors as the main electrical components, which have excellent volt-ampere characteristics. They present high resistance under normal operating voltage and only flow a small leakage current. When lightning and operating overvoltage occur in the system, they present low resistance, so that the residual voltage of the arrester is limited to below the allowable value, preventing the pantograph and vehicle equipment from being damaged by overvoltage, thereby providing reliable protection for vehicle equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the main structure of a DC lightning arrester assembly with a discharge action monitoring function;

[0017] Figure 2 This is a schematic diagram of the top view of the DC lightning arrester assembly with discharge action monitoring function.

[0018] In the figure: DC lightning arrester 1, counter connecting row 2, counter protective cover 3, discharge counter 4, stainless steel bolt four 5, assembly connecting plate 6, DC lightning arrester positioning hole 61, counter protective cover positioning hole 62, grounding bolt hole 63, rounded rectangular slot hole 64, stainless steel bolt one 7, stainless steel bolt two 8, stainless steel bolt three 9. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] Example 1: Figure 1 and 2 , including an assembly connecting plate 6, a DC lightning arrester 1 is fixedly installed on the top surface of one side of the assembly connecting plate 6, a counter protective cover positioning hole 62 is fixedly installed on the top surface of the side of the assembly connecting plate 6 away from the DC lightning arrester 1, a discharge counter 4 is fixedly installed on the inner wall of the counter protective cover positioning hole 62, the discharge counter 4 is electrically connected to the DC lightning arrester 1 through the connecting row 2, and a grounding bolt hole 63 is opened on the top surface of the assembly connecting plate 6, and the grounding bolt hole 63 is electrically connected to the ground through a stainless steel bolt 8 through a wire.

[0021] The specific usage scenario of this embodiment is: an assembly connection plate 6 is provided for installing a DC lightning arrester 1 and a discharge counter 4. The main components of the DC lightning arrester 1 are the main components of the lightning arrester. The inside is a core body, and the outside is a jacket formed by die-casting of an encapsulated silicone rubber. The bottom is a base, and the top surface is a high-voltage terminal. A DC zinc oxide resistor is used as the main electrical component inside the core body. Hardware and buffer springs are provided at both ends of the resistor to prevent damage to the resistor from various impact vibrations. After being compressed, it is covered with an insulating tube. The insulating tube has high mechanical strength. When the lightning arrester is overloaded When a fault occurs, it will not cause a vicious explosion. The core of the DC lightning arrester 1 is coated with a special primer liquid, so that the silicone rubber composite jacket is bonded to the core during molding, eliminating the control of breathing, avoiding accidents caused by moisture in the DC lightning arrester 1, and improving the heat dissipation performance of the resistor. The DC lightning arrester 1 jacket adopts an anti-fouling large and small umbrella design, which has excellent pollution resistance and hydrophobicity, and can operate reliably in various harsh atmospheric environments. The base of the DC lightning arrester 1 is made of alloy aluminum, and the terminals and other exposed metal parts are made of stainless steel, which is corrosion-resistant and beautiful. The discharge meter The counter 4 uses a six-digit liquid crystal display to record the number of times the arrester operates. It has a compact structure, beautiful appearance, and reliable sealing. The copper braided belt with a resistance of less than 1 milliohm is used internally to connect with the DC arrester side contact, which will not raise the protective residual voltage value of the arrester. It has high sensitivity, accuracy and reliability, and there is no direct electrical connection between the arrester circuit and the counter measurement circuit. The electrical part of the discharge counter 4 is composed of a counting unit, an optical coupler, a converter, and an induction coil. The discharge counter 4 part works through a built-in self-contained power supply. When the system is working normally, the current flowing through the copper braided belt is The arrester's own leakage current is only in the millimeter level, which is not enough to excite the induction coil to generate a sampling voltage, and the back-end counting circuit does not work. When the DC arrester 1 is subjected to operation or lightning overvoltage, the current flowing through the copper braided belt exceeds 50A, and the induction coil circuit generates an induced voltage signal. This signal is rectified, shaped and clamped by the converter to drive the optocoupler. The output end of the optocoupler generates a pull-down signal level, which is sent to the input end of the single-chip microcomputer of the discharge counter 4. The single-chip microcomputer of the counting unit outputs a carry signal to drive the LCD digital tube to display the accumulation once and keep the memory.

[0022] Example 2: Figure 1 and Figure 2A DC lightning arrester positioning hole 61 is provided on the top surface of the assembly connecting plate 6. There are three DC lightning arrester positioning holes 61, which are distributed in a circular array. The three DC lightning arrester positioning holes 61 are fixedly connected to the base of the DC lightning arrester 1 by three stainless steel bolts 9. A counter protective cover positioning hole 62 is provided on the top surface of the assembly connecting plate 6. There are four counter protective cover positioning holes 62, which are distributed in a rectangular shape. The inner wall of the counter protective cover positioning hole 62 is fixedly connected to the counter protective cover 3 by a stainless steel bolt 7. Rounded rectangular slots 64 are provided on the top surfaces of the front and rear sides of the assembly connecting plate 6 for easy installation and adjustment. The inner wall of the counter protective cover 3 is fixedly installed with a discharge counter bracket by four stainless steel bolts 5. The discharge counter bracket is set in a U shape, and the discharge counter 4 is fixedly installed on the inner wall of the discharge counter bracket.

[0023] The specific usage scenario of this embodiment is: the DC lightning arrester positioning hole 61 is used to install the DC lightning arrester 1, the counter protective cover positioning hole 62 is set to install the counter protective cover 3, and the discharge counter bracket is set to fix the discharge counter 4 inside the counter protective cover 3.

[0024] The working principle of the utility model is: when in use, a person skilled in the art fixes the DC lightning arrester 1 on the DC lightning arrester positioning hole 61 on the top surface of the assembly connecting plate 6 through a stainless steel bolt three 9, fixes the counter shield 3 on the counter shield positioning hole 62 through a stainless steel bolt one 7, then fixes the discharge counter bracket on the inner wall of the counter shield positioning hole 62, and then fixes the discharge counter 4 on the electrical counter bracket, and electrically connects the DC lightning arrester 1 and the discharge counter 4 through a counter connecting row 2. The DC lightning arrester 1 uses a DC metal oxide resistor as a main electrical component, which has excellent volt-ampere characteristics, presents a high resistance value under normal operating voltage, and only flows a small leakage current. When lightning and operating overvoltage occur in the system, it presents a low resistance, so that the residual pressure of the lightning arrester is limited to below the allowable value, avoiding the pantograph and vehicle equipment from being damaged by overvoltage, thereby providing reliable protection for the vehicle equipment. When necessary, the vehicle maintenance personnel can climb to the top when the vehicle is powered off, observe the cumulative number of discharge actions of the lightning arrester at a close distance, and keep the written record for further analysis.

[0025] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A DC lightning arrester assembly with a discharge action monitoring function, comprising an assembly connecting plate (6), a DC lightning arrester (1) being fixedly mounted on the top surface of one side of the assembly connecting plate (6), characterized in that: A counter protection cover positioning hole (62) is fixedly installed on the top surface of the side of the assembly connection plate (6) away from the DC lightning arrester (1), and a discharge counter (4) is fixedly installed on the inner wall of the counter protection cover positioning hole (62). The discharge counter (4) is electrically connected to the DC lightning arrester (1) through a connection row (2). A grounding bolt hole (63) is opened on the top surface of the assembly connection plate (6), and the grounding bolt hole (63) is electrically connected to the ground through a stainless steel bolt (8) and a conductor.

2. The DC lightning arrester assembly with discharge action monitoring function according to claim 1 is characterized in that: A DC lightning arrester positioning hole (61) is provided on the top surface of the assembly connection plate (6), three DC lightning arrester positioning holes (61) are provided, and the three DC lightning arrester positioning holes (61) are distributed in a circular array.

3. The DC lightning arrester assembly with discharge action monitoring function according to claim 2 is characterized in that: The three DC lightning arrester positioning holes (61) are fixedly connected to the base of the DC lightning arrester (1) by means of three stainless steel bolts (9), and a counter protective cover positioning hole (62) is provided on the top surface of the assembly connection plate (6).

4. The DC lightning arrester assembly with discharge action monitoring function according to claim 3 is characterized in that: Four counter protection cover positioning holes (62) are provided, and the four counter protection cover positioning holes (62) are distributed in a rectangular shape.

5. The DC lightning arrester assembly with discharge action monitoring function according to claim 4 is characterized in that: The inner wall of the counter protection cover positioning hole (62) is fixedly connected to the counter protection cover (3) by a stainless steel bolt (7), and rounded rectangular slots (64) are provided on the top surfaces of both the front and rear sides of the assembly connection plate (6).

6. The DC lightning arrester assembly with discharge action monitoring function according to claim 5 is characterized in that: The inner wall of the counter protection cover (3) is fixedly mounted with a discharge counter bracket by means of four stainless steel bolts (5); the discharge counter bracket is arranged in a U shape, and the discharge counter (4) is fixedly mounted on the inner wall of the discharge counter bracket.

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