Plug-in lightning arrester

Abstract

The utility model relates to the field of lightning arresters, in particular to a plug-in lightning arrester, which comprises a lightning arrester main body, a wiring end is fixedly mounted at the upper end of the lightning arrester main body, a grounding end is fixedly mounted at the lower end of the lightning arrester main body, the lightning arrester main body comprises a cylinder, and the grounding end comprises a grounding base. And a retraction groove is formed in the grounding base, a second return spring is movably installed in the retraction groove, and the lower end of the cylinder body is slidably connected with the retraction groove in a sleeving mode. According to the utility model, the lightning arrester main body is installed by using the principle of a spring bayonet lock, the wiring end and the grounding end are plugged with the installation interface by using plugging force, and the second return spring provides elastic thrust for the wiring end and the grounding end, so that the plugging tightness is increased; when the distance between the interfaces of the ground wire and the power transmission line is changed due to external impact, shaking and the like, a certain buffering effect is provided, the distance cannot be directly borne by the cylinder body, and a certain protection effect is provided for the lightning arrester main body.

Description

Technical Field

[0001] The utility model relates to the field of lightning arresters, in particular to a plug-in lightning arrester. Background Art

[0002] Lightning arresters are used to protect the insulation of AC power transmission and transformation equipment from lightning overvoltage and operating overvoltage damage. They are suitable for overvoltage protection of transformers, transmission lines, distribution panels, switch cabinets, power meter boxes, vacuum switches, parallel compensation capacitors, rotating motors and semiconductor devices.

[0003] With the development of science and technology, some lightning arresters are gradually tending to be miniaturized, and for the convenience of installation, they are designed as plug-in structures. Although it is convenient to install, the connection tightness with the transmission line and the ground wire depends entirely on the plug-in force, and there is room for improvement in the connection tightness. For example, industrial equipment and washing machines have a certain amount of shaking when working, which may cause the interfaces that rely on plug-in force to detach. Utility Model Content

[0004] The purpose of the utility model is to provide a pluggable lightning arrester to solve the problems raised in the above background technology.

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

[0006] A plug-in lightning arrester comprises a lightning arrester body, a wiring terminal is fixedly mounted on the upper end of the lightning arrester body, a grounding terminal is fixedly mounted on the lower end of the lightning arrester body, the lightning arrester body comprises a cylinder, the grounding terminal comprises a grounding base, a retraction groove is provided inside the grounding base, a No. 2 return spring is movably mounted in the retraction groove, and the lower end of the cylinder is slidably sleeved with the retraction groove.

[0007] Furthermore, the cylinder is filled with sulfur hexafluoride gas, a pressure equalizing hood is fixedly installed inside the cylinder, and a compensation slide groove is arranged inside the pressure equalizing hood.

[0008] Furthermore, the compensating slide groove is movably provided with a return spring No. 1, the compensating slide groove is slidably sleeved with the upper end of the insulating rod, a zinc oxide valve plate is fixedly installed inside the insulating rod, and the upper end of the zinc oxide valve plate is fixedly connected with a connecting slide rod.

[0009] Furthermore, the wiring terminal includes a terminal mounting seat, fastening screws are fixedly installed on both sides of the terminal mounting seat, an insulator is fixedly installed on the upper end of the terminal mounting seat, a wiring terminal is fixedly installed on the upper end of the insulator, a conductive connecting rod is inserted and installed inside the terminal mounting seat, the insulator and the wiring terminal, and a sliding rod movable groove is opened in the conductive connecting rod.

[0010] Furthermore, a clamping groove is provided on the bottom side of the grounding base, and a grounding terminal is fixedly installed inside the clamping groove.

[0011] Furthermore, the lower end of the conductive connecting rod is fixedly connected to the upper side of the voltage equalizing cover, and the upper end of the connecting sliding rod passes through the upper side of the voltage equalizing cover and is slidably sleeved in the movable groove of the sliding rod.

[0012] Furthermore, the lower end of the zinc oxide valve plate passes through the cylinder and the grounding base and is fixedly connected to the grounding terminal.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The main body of the lightning arrester is installed by using the principle of spring bayonet. When the wiring terminal and the grounding terminal are connected with the installation interface by using the plug-in force, the elastic thrust provided by the No. 2 return spring to the wiring terminal and the grounding terminal increases the plug-in tightness. At the same time, the retraction groove provides a retraction space between the cylinder and the grounding base. When the distance between the ground wire and the transmission line interface changes due to external impact, shaking, etc., it provides a certain buffering effect and will not be directly borne by the cylinder, providing a certain protection effect for the main body of the lightning arrester.

[0015] 2. By filling sulfur hexafluoride gas with a certain pressure value into the sulfur hexafluoride gas, a relatively stable insulating environment is provided for the power transmission and protection structure inside the cylinder. The pressure equalizing cover balances the pressure of the high-pressure sulfur hexafluoride gas on the connection between the zinc oxide valve plate and the conductive connecting rod, and the insulating rod provides an insulating layer on the outside of the zinc oxide valve plate to improve stability and prevent the actual threshold of the zinc oxide valve plate from being affected by the internal environment of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a sectional view of the overall structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the main part of the lightning arrester in the utility model.

[0019] In the figure: 1. Lightning arrester body; 101. Cylinder; 102. Sulfur hexafluoride gas; 103. Equalizing cover; 104. Compensating slide; 105. No. 1 return spring; 106. Insulating rod; 107. Zinc oxide valve plate; 108. Connecting slide; 2. Wiring terminal; 201. Terminal mounting seat; 202. Fastening screw; 203. Insulator; 204. Wiring terminal; 205. Conductive connecting rod; 206. Slide movable groove; 3. Grounding terminal; 301. Grounding base; 302. Retraction groove; 303. No. 2 return spring; 304. Clamping groove; 305. Grounding terminal. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 3 In an embodiment of the utility model, a plug-in lightning arrester includes a lightning arrester body 1, a wiring terminal 2 is fixedly installed on the upper end of the lightning arrester body 1, a grounding terminal 3 is fixedly installed on the lower end of the lightning arrester body 1, the lightning arrester body 1 includes a cylinder 101, and the grounding terminal 3 includes a grounding base 301. A retraction groove 302 is opened inside the grounding base 301, and a No. 2 return spring 303 is movably installed in the retraction groove 302. The lower end of the cylinder 101 is slidably connected with the retraction groove 302; a clamping groove 304 is opened on the bottom side of the grounding base 301, and a grounding terminal 305 is fixedly installed inside the clamping groove 304.

[0022] Specifically, the grounding terminal 3 is clamped to the ground wire installation interface of the lightning arrester main body 1 installation position opened in the electrical appliance, the cylinder 101 is pressed to retract the lower end of the cylinder 101 into the retraction groove 302, the actual length of the lightning arrester main body 1 is compressed, the terminal 2 is directed to the line installation interface, the cylinder 101 is loosened, and the terminal 2 is clamped into the line installation interface by using the rebound force provided by the second return spring 303 to the cylinder 101, and the lightning arrester main body 1 is installed by using the principle of the spring bayonet. While the terminal 2 and the grounding terminal 3 are plugged in with the installation interface by means of the plug-in force, the elastic thrust provided by the No. 2 return spring 303 to the terminal 2 and the grounding terminal 3 increases the plug-in tightness, and at the same time, a retraction space is provided between the cylinder 101 and the grounding base 301 by the retraction groove 302, which provides a certain buffering effect when the distance between the ground wire and the transmission line interface changes due to external impact, shaking, etc., and will not be directly borne by the cylinder 101, thereby providing a certain protection effect for the arrester body 1.

[0023] Embodiment 1

[0024] like Figure 1As shown, in this embodiment, the terminal 2 includes a terminal mounting seat 201, fastening screws 202 are fixedly installed on both sides of the terminal mounting seat 201, an insulator 203 is fixedly installed on the upper end of the terminal mounting seat 201, and a terminal 204 is fixedly installed on the upper end of the insulator 203. A conductive connecting rod 205 is inserted and installed inside the terminal mounting seat 201, the insulator 203 and the terminal 204, and a sliding rod movable groove 206 is opened in the conductive connecting rod 205; the lower end of the conductive connecting rod 205 is fixedly connected to the upper side of the voltage equalizing cover 103, and the upper end of the connecting slide rod 108 passes through the upper side of the voltage equalizing cover 103 and is slidably connected to the sliding rod movable groove 206.

[0025] In this embodiment, when the cylinder 101 and the grounding base 301 are telescopically movable, the upper end of the insulating rod 106 slides up and down in the compensation slide groove 104, and the connecting slide rod 108 slides in the slide rod movable groove 206, and the connection between the zinc oxide valve plate 107 and the conductive connecting rod 205 is designed to be movable, so as to compensate for the pulling on the internal structure of the cylinder 101 caused by the movement between the cylinder 101 and the grounding base 301, and keep the connection between the zinc oxide valve plate 107 and the conductive connecting rod 205 When it is active, it can still maintain normal current transmission work.

[0026] Embodiment 2

[0027] On the basis of the first embodiment, in order to make up for the stability effect of the power transmission work of the sliding connection structure between the connecting slide bar 108 and the slide bar movable groove 206 in the first embodiment, and the insulation effect of the surrounding.

[0028] like Figure 2 As shown, in this embodiment, the cylinder 101 is filled with sulfur hexafluoride gas 102, a pressure equalizing cover 103 is fixedly installed inside the cylinder 101, and a compensation slide 104 is opened inside the pressure equalizing cover 103; a No. 1 return spring 105 is movably installed in the compensation slide 104, and the compensation slide 104 is slidably connected to the upper end of the insulating rod 106, a zinc oxide valve plate 107 is fixedly installed inside the insulating rod 106, and the upper end of the zinc oxide valve plate 107 is fixedly connected to a connecting slide rod 108; the lower end of the zinc oxide valve plate 107 passes through the cylinder 101 and the grounding base 301 and is fixedly connected to the grounding terminal 305.

[0029] In specific implementation, sulfur hexafluoride gas 102 with a certain pressure value is filled into the sulfur hexafluoride gas 102 to provide a relatively stable insulating environment for the power transmission and protection structure inside the cylinder 101, and the pressure equalizing cover 103 balances the pressure of the high-pressure sulfur hexafluoride gas 102 on the connection between the zinc oxide valve plate 107 and the conductive connecting rod 205, and the insulating rod 106 provides an insulating layer on the outside of the zinc oxide valve plate 107 to improve stability and prevent the actual threshold of the zinc oxide valve plate 107 from being affected by the internal environment of the cylinder 101.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pluggable lightning arrester, comprising a lightning arrester body (1), characterized in that: A wiring terminal (2) is fixedly mounted on the upper end of the arrester body (1), and a grounding terminal (3) is fixedly mounted on the lower end of the arrester body (1). The arrester body (1) comprises a cylinder (101), and the grounding terminal (3) comprises a grounding base (301). A retraction groove (302) is provided inside the grounding base (301), and a second return spring (303) is movably mounted in the retraction groove (302). The lower end of the cylinder (101) is slidably connected to the retraction groove (302).

2. A pluggable lightning arrester according to claim 1, characterized in that: The cylinder (101) is filled with sulfur hexafluoride gas (102), a pressure equalizing cover (103) is fixedly installed inside the cylinder (101), and a compensation slide groove (104) is provided inside the pressure equalizing cover (103).

3. A pluggable lightning arrester according to claim 2, characterized in that: The compensating slide groove (104) is movably provided with a return spring (105), and the compensating slide groove (104) is slidably sleeved with the upper end of the insulating rod (106). A zinc oxide valve plate (107) is fixedly provided inside the insulating rod (106), and a connecting slide rod (108) is fixedly connected to the upper end of the zinc oxide valve plate (107).

4. A pluggable lightning arrester according to claim 3, characterized in that: The wiring terminal (2) comprises a terminal mounting seat (201), fastening screws (202) are fixedly mounted on both sides of the terminal mounting seat (201), an insulator (203) is fixedly mounted on the upper end of the terminal mounting seat (201), a wiring terminal (204) is fixedly mounted on the upper end of the insulator (203), a conductive connecting rod (205) is inserted and mounted inside the terminal mounting seat (201), the insulator (203) and the wiring terminal (204), and a sliding rod movable groove (206) is provided inside the conductive connecting rod (205).

5. The pluggable arrester according to claim 4, characterized in that: A clamping groove (304) is provided on the bottom side of the grounding base (301), and a grounding terminal (305) is fixedly installed inside the clamping groove (304).

6. The pluggable arrester according to claim 5, characterized in that: The lower end of the conductive connecting rod (205) is fixedly connected to the upper side of the voltage equalizing cover (103), and the upper end of the connecting sliding rod (108) passes through the upper side of the voltage equalizing cover (103) and is slidably sleeved into the sliding rod movable groove (206).

7. The pluggable arrester according to claim 6, characterized in that: The lower end of the zinc oxide valve plate (107) passes through the cylinder (101) and the grounding base (301) and is fixedly connected to the grounding terminal (305).

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