Lightning protection equipment for electric locomotive

Abstract

The utility model relates to the technical field of lightning protection equipment, and discloses lightning protection equipment for an electric locomotive, which comprises an insulating shell, a bottom cover is fixedly mounted at the bottom of the insulating shell, a base is inserted into the bottom of the bottom cover, a top cover is fixedly mounted at the top of the insulating shell, and a voltage equalizer is sleeved on the outer surface of the insulating shell. The top of the bottom cover is fixedly provided with an insulating cylinder used for protection, and a core body is inserted into the insulating cylinder. According to the lightning protection equipment for the electric locomotive, through cooperative arrangement of the insulating cylinder, the top cover and the voltage equalizer, the service life of the lightning protection equipment can be prolonged in the use process, through arrangement of the insulating cylinder, the core body is conveniently stored, an isolated electrical environment is provided for the core body, through arrangement of the top cover, the lightning protection equipment can exchange gas with the outside in the use process, and the lightning protection equipment is convenient to use. And through the arrangement of the voltage equalizer, the discharge characteristic of the device can be improved, and the condition that the lightning arrester is damaged under the condition of electrical overvoltage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection equipment, in particular to a lightning protection equipment for electric locomotives. Background Art

[0002] Electric locomotives often run on long-distance railway lines. These lines often pass through open areas with sparse buildings and a high frequency of heavy rain and thunderstorms. This environment makes electric locomotives susceptible to lightning strikes and power interference. The main function of lightning protection equipment is to protect the electrical equipment of the electric locomotive from lightning strikes and power interference by introducing external electric and magnetic fields during the operation of the electric locomotive, thereby ensuring the normal operation of the electric locomotive. With the continuous expansion of the scale of global power grid construction and the rapid development of my country's high-speed EMUs, electric locomotives and electrified railways, the market demand for insulators and lightning arresters continues to increase, promoting the development of the industry.

[0003] Chinese patent announcement number CN211654459U discloses an arrester for electric locomotives, which relates to the technical field of lightning protection equipment, including a shell, the outer surface of the shell is an umbrella-shaped edge, a zinc oxide resistor is arranged inside the shell, the upper part of the shell is fixedly connected to a high-voltage end connecting piece by a fixing bolt, and a high-voltage line connecting terminal is provided at the end of the high-voltage end connecting piece away from the fixing bolt. A first protective shell is provided on the outer surface of the shell and located on the outside of the high-voltage end connecting piece and the high-voltage line connecting terminal, and a flange is fixedly connected to the end of the shell away from the high-voltage end connecting piece. In the utility model, two independent protective shells are used to protect the exposed metal end of the arrester for electric locomotives to prevent the exposed metal part of the arrester from being affected by the natural environment. The structure is sophisticated and the connection is convenient. It is improved on the basis of the existing arrester and does not require laborious re-production. The improvement and replacement of the existing arrester for electric locomotives can be quickly realized.

[0004] However, the utility model has the following problems when actually used:

[0005] This utility model only protects the exposed metal parts of the lightning arrester, and does not provide effective protection measures inside the lightning arrester, which makes it easy for the inside of the lightning arrester to be damaged during use, resulting in the utility model being unable to work normally and having low practicality. Utility Model Content

[0006] (1) Technical problems solved

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lightning protection device for electric locomotives, which solves the problems in the prior art:

[0008] This utility model only protects the exposed metal parts of the lightning arrester, and does not provide effective protection measures inside the lightning arrester, which makes it easy for the inside of the utility model to be damaged during use, resulting in the utility model being unable to work normally, and having low practicality.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a lightning protection device for electric locomotives, comprising an insulating shell, a bottom cover fixedly installed at the bottom of the insulating shell, a base plugged into the bottom of the bottom cover, a top cover fixedly installed at the top of the insulating shell, a voltage equalizer sleeved on the outer surface of the insulating shell, an insulating cylinder for protection fixedly installed on the top of the bottom cover, and a core plugged into the interior of the insulating cylinder.

[0011] Optionally, a limiting hole is provided at one end of the insulating shell, and an umbrella-shaped skirt is fixedly connected to the outer surface of the insulating shell.

[0012] Optionally, a grounding structure is inserted into the middle of the bottom cover, and a flange gasket is fixedly installed on the top of the bottom cover.

[0013] Optionally, a positioning hole for limiting is opened in the middle of the base, and a bolt for positioning is inserted at one end of the base.

[0014] Optionally, a connection terminal is plugged into the middle of the top cover, a flange for connection is fixedly mounted on the bottom of the top cover, and a threaded hole for limiting is fixedly mounted on the top of the flange.

[0015] Optionally, a fixing ring is fixedly installed on the top of the pressure equalizer, and a pressure equalizing ring is fixedly installed inside the pressure equalizer.

[0016] Optionally, an insulating rod for limiting position is fixedly installed inside the insulating cylinder, and a conductive ring is fixedly installed at the bottom of the insulating cylinder.

[0017] Optionally, a pressure spring is fixedly installed on the top of the core body, and a zinc oxide valve plate is fixedly installed on the bottom of the core body.

[0018] (3) Beneficial effects

[0019] The utility model provides a lightning protection device for electric locomotives, which has the following beneficial effects:

[0020] The lightning arrester for electric locomotives can extend the service life of the device during use through the coordinated arrangement of the insulating cylinder, the top cover and the voltage equalizer. The arrangement of the insulating cylinder facilitates the storage of the core and provides an isolated electrical environment for the core. The arrangement of the top cover allows the device to exchange gas with the outside world during use, reducing the possibility of damage caused by overheating of the insulating shell. The arrangement of the voltage equalizer can keep the potential between the electrodes of the device balanced when it is working, improve the discharge characteristics of the device, and reduce the damage of the lightning arrester due to electrical overvoltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the insulating shell structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the bottom cover structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the base structure of the utility model;

[0025] Figure 5 This is a schematic diagram of the explosion structure of the top cover of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the voltage equalizer of the utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the insulation tube of the utility model;

[0028] Figure 8 This is a schematic diagram of the explosion structure of the insulating cylinder of the utility model;

[0029] Figure 9 This is a schematic diagram of the core structure of the utility model;

[0030] Figure 10 This is a schematic diagram of the structure of the communicating vessel of the utility model;

[0031] Figure 11 This is a schematic diagram of the connecting bolt structure of the utility model.

[0032] In the figure: 1. Insulating shell; 2. Bottom cover; 3. Base; 4. Top cover; 5. Voltage equalizer; 6. Insulating tube; 7. Core; 8. Limit hole; 9. Umbrella skirt; 10. Grounding structure; 1001. U-tube; 1002. Connecting bolt; 11. Flange gasket; 12. Positioning hole; 13. Bolt; 14. Terminal; 15. Flange; 16. Threaded hole; 17. Fixing ring; 18. Voltage equalizer ring; 19. Insulating rod; 20. Conductive ring; 21. Pressure spring; 22. Zinc oxide valve plate. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8 , the utility model provides a technical solution: a lightning protection device for electric locomotive, in order to extend the service life of the device, is provided with an insulating cylinder 6, a top cover 4 and a voltage equalizer 5;

[0035] The top of the insulating shell 1 is fixedly installed with a top cover 4, the outer surface of the insulating shell 1 is sleeved with a voltage equalizer 5, the top of the bottom cover 2 is fixedly installed with an insulating cylinder 6 for protection, the middle of the top cover 4 is plugged with a terminal 14, the bottom of the top cover 4 is fixedly installed with a flange 15 for connection, the top of the flange 15 is fixedly installed with a threaded hole 16 for protection, the top of the voltage equalizer 5 is fixedly installed with a fixing ring 17, the inside of the voltage equalizer 5 is fixedly installed with a voltage equalizing ring 18, the inside of the insulating cylinder 6 is fixedly installed with an insulating rod 19 for limiting, and the bottom of the insulating cylinder 6 is fixedly installed with a conductive ring 20, so that the device is in use. When the device is in parallel with the wiring terminal 14, the electrical equipment can be connected to the device through the setting of the flange 15, the insulating shell 1 and the top cover 4 can be fixedly connected through the setting of the threaded hole 16, the insulating tube 6 and the top cover 4 can be fixedly connected through the setting of the fixing ring 17, the voltage equalizer 5 can be fixed on the insulating shell 1, and the voltage equalizing ring 18 can be set to balance the stray capacitance to the ground, so that the voltage distribution is uniform and the device will not be damaged by local breakdown. The setting of the insulating rod 19 facilitates the installation and use of the zinc oxide valve plate 22, and the setting of the conductive ring 20 can form a power path for the device.

[0036] See also Figure 1 、 Figure 3 and Figure 4 In order to ensure that the device can be stably fixed on the electric locomotive during use, a bottom cover 2 and a base 3 are provided;

[0037] A bottom cover 2 is fixedly installed at the bottom of the insulating shell 1, a base 3 is plugged into the bottom of the bottom cover 2, a grounding structure 10 is plugged into the middle of the bottom cover 2, a flange gasket 11 is fixedly installed on the top of the bottom cover 2, a positioning hole 12 for limiting is opened in the middle of the base 3, and a bolt 13 for positioning is plugged into one end of the base 3. Therefore, through the setting of the grounding structure 10, the device can be connected to the earth and the lightning current can be introduced into the earth. Through the setting of the flange gasket 11, the insulating shell 1 and the bottom cover 2 can be fixedly connected. Through the setting of the positioning hole 12, the bottom cover 2 can be fixedly installed on the base 3. Through the setting of the bolt 13, the device can be fixedly installed on the top of the electric locomotive.

[0038] See also Figure 2 and Figure 9 In order to reduce the damage of lightning to the electric locomotive during use, an insulating shell 1 and a core 7 are provided;

[0039] It includes an insulating shell 1, an insulating tube 6 with a core 7 inserted inside, a limiting hole 8 is provided at one end of the insulating shell 1, an umbrella-shaped skirt 9 is fixedly connected to the outer surface of the insulating shell 1, a pressure spring 21 is fixedly installed on the top of the core 7, and a zinc oxide valve plate 22 is fixedly installed on the bottom of the core 7. Therefore, through the setting of the limiting hole 8, the insulating shell 1 and the bottom cover 2 and the top cover 4 can be fixedly connected. Through the setting of the umbrella-shaped skirt 9, the residual moisture can be reduced and the risk of freezing and cracking of the lightning arrester can be reduced. Through the setting of the pressure spring 21, the zinc oxide valve plates 22 in series can be pressed to have good electrical contact. Through the setting of the zinc oxide valve plates 22, under the action of lightning overvoltage, the valve plates present a low resistance state, discharge lightning current, and suppress the residual pressure of the electrical equipment connected in parallel with the device below the equipment insulation safety value. After the harmful overvoltage disappears, the valve plates quickly restore to high resistance and are insulated, thereby protecting the insulation of the electrical equipment from overvoltage damage.

[0040] Embodiment 1: The grounding structure 10 is provided to form a good electrical connection between the device and the ground when in use, so that when the electric locomotive is struck by lightning, the current is effectively introduced into the ground, dispersed and released, thereby achieving the purpose of protecting the electric locomotive;

[0041] Embodiment 2: The grounding structure 10 may be a connector 1001, which allows the device to be connected to a detection instrument during use to monitor the state of the lightning arrester, thereby increasing the practicality of the device;

[0042] Embodiment 3: The grounding structure 10 may be a connecting bolt 1002 , which may connect two lightning arresters to withstand a higher voltage and increase the lightning resistance of the device.

[0043] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0044] In the present invention, the working steps of the device are as follows:

[0045] First, the device is fixedly installed on the electric locomotive by bolts 13, the electrical equipment is connected to the terminal 14, and the grounding structure 10 is connected to the grounding wire of the electric locomotive. Under normal operating voltage, the resistance of the zinc oxide valve plate 22 is very large, equivalent to the insulating state. At this time, the current flowing through the lightning arrester is extremely small, only a few hundred microamperes. When the electric locomotive system has an overvoltage or is struck by lightning, the resistance of the zinc oxide valve plate 22 drops rapidly, forming a low-impedance state. By guiding the overvoltage current to shunt and discharge, the overvoltage energy can be discharged, thereby protecting the electrical equipment from damage. Once the overvoltage disappears, the zinc oxide valve plate 22 returns to a high-impedance state and does not affect the passage of normal current.

[0046] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning protection device for electric locomotive, comprising an insulating housing (1), characterized in that: A bottom cover (2) is fixedly mounted on the bottom of the insulating shell (1), a base (3) is plugged into the bottom of the bottom cover (2), a top cover (4) is fixedly mounted on the top of the insulating shell (1), a voltage equalizer (5) is sleeved on the outer surface of the insulating shell, an insulating cylinder (6) for protection is fixedly mounted on the top of the bottom cover (2), and a core (7) is plugged into the interior of the insulating cylinder (6).

2. The lightning protection device for electric locomotive according to claim 1, characterized in that: A limiting hole (8) is provided at one end of the insulating shell (1), and an umbrella-shaped skirt (9) is fixedly connected to the outer surface of the insulating shell (1).

3. The lightning protection device for electric locomotive according to claim 1, characterized in that: A grounding structure (10) is plugged into the middle of the bottom cover (2), and a flange gasket (11) is fixedly mounted on the top of the bottom cover (2).

4. The lightning protection device for electric locomotive according to claim 1, characterized in that: A positioning hole (12) for limiting is provided in the middle of the base (3), and a bolt (13) for positioning is inserted into one end of the base (3).

5. The lightning protection device for electric locomotive according to claim 1, characterized in that: A connection terminal (14) is plugged into the middle of the top cover (4), a flange (15) for connection is fixedly mounted on the bottom of the top cover (4), and a threaded hole (16) for limiting is fixedly mounted on the top of the flange (15).

6. The lightning protection device for electric locomotive according to claim 1, characterized in that: A fixing ring (17) is fixedly installed on the top of the pressure equalizer (5), and a pressure equalizing ring (18) is fixedly installed inside the pressure equalizer (5).

7. The lightning protection device for electric locomotive according to claim 1, characterized in that: An insulating rod (19) for limiting position is fixedly installed inside the insulating cylinder (6), and a conductive ring (20) is fixedly installed at the bottom of the insulating cylinder (6).

8. The lightning protection device for electric locomotive according to claim 1, characterized in that: A pressure spring (21) is fixedly mounted on the top of the core (7), and a zinc oxide valve plate (22) is fixedly mounted on the bottom of the core (7).

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