CN210006544U - A composite jacket metal oxide arrester - Google Patents

Abstract

The utility model relates to an electric power system arrester technical field discloses kind composite coat metal oxide arrester, including arrester body, composite coat, disconnector and connecting piece, arrester body holding is in composite coat, the arrester body is including the resistance card of range upon range of connection in proper order, electrode, insulating base and second electrode, the end of connecting piece passes composite coat and is connected with electrode, the disconnector includes disconnector body, high-pressure connecting bolt, low pressure connecting bolt and earth conductor, end of disconnector body is connected with earth conductor through low pressure connecting bolt, the other end of disconnector body is connected through high-pressure connecting bolt and end of connecting piece in addition, the utility model discloses a composite coat metal oxide arrester need not to install the disconnector through insulating support, has avoided insulating support's design effectively, just the utility model discloses a composite coat metal oxide arrester's simple structure, easily installation has consequently reduced the cost of arrester.

Description

A composite jacket metal oxide arrester

technical field

The utility model relates to the technical field of electric power system arresters, in particular to a composite jacket metal oxide arrester.

Background technique

With the development of social economy and the improvement of people's quality of life, the scale of development of the power system has become larger and larger, the structure of the power system has become more and more complex, and the distribution of its lines has become more extensive, which makes the power system vulnerable to lightning strikes, and the occurrence of When single-phase grounding or non-full-phase operation occurs, high lightning overvoltage or operating overvoltage will occur, so people put forward higher requirements for the reliability and quality of the power system.

As an electrical appliance that protects electrical equipment from high transient overvoltage and can limit the amplitude of freewheeling, surge arresters are widely used in power systems to protect communication lines and equipment. In the power system, the arrester is usually connected between the cable and the ground. When an abnormal voltage occurs in the power system, the arrester will act immediately to guide the voltage and impulse current to the ground, thereby limiting the voltage amplitude to protect the communication cable and equipment. insulation.

Among them, the disconnector is a special accessory of the arrester. When the arrester is abnormal, the power frequency short-circuit current can be used to make the disconnector act, so that the ground end of the disconnector is automatically disconnected, thereby isolating the arrester in the power system, thus effectively preventing the further expansion of the accident. At present, a special insulating bracket is usually used to install the disconnector on the arrester. When the disconnector acts, the insulating bracket plays the role of insulating and supporting the arrester. Therefore, in the arrester, the requirements for the insulating support are higher, not only the insulating support needs to have the ability to withstand the temporary overvoltage of the system, but also need to have high mechanical strength and weather resistance, but also need to meet a certain creepage distance requirements, which makes the structure of the arrester complex and difficult to install, resulting in high cost of the arrester.

Utility model content

The purpose of the utility model is to provide a composite jacket metal oxide arrester, which is simple in structure and easy to install, thereby reducing the cost of the arrester.

In order to solve the above-mentioned technical problems, the present utility model provides a metal oxide arrester with a composite jacket, which includes an arrester body, a composite jacket, a disconnector and a connector, and the arrester body is accommodated in the composite jacket;

The arrester body includes a resistor sheet, a first electrode, an insulating base and a second electrode that are stacked and connected in sequence, and one end of the connector passes through the composite jacket and is connected to the first electrode;

The disconnector includes a disconnector body, a high-voltage connection bolt, a low-voltage connection bolt, and a ground wire, one end of the disconnector body is connected to the ground wire through the low-voltage connection bolt, and the other end of the disconnector body is connected to the ground wire through the low-voltage connection bolt. The high-voltage connecting bolt is connected with the other end of the connecting piece.

As a preferred solution, a side of the first electrode close to the composite casing is provided with a first installation hole, and one end of the connector passes through the composite casing and is connected in the first installation hole.

As a preferred solution, the connecting member is a bolt.

As a preferred solution, the composite jacket metal oxide arrester further includes a winding layer disposed between the composite jacket and the arrester body, and the winding layer wraps the arrester body.

As a preferred solution, the winding layer is formed of epoxy resin impregnated glass fiber.

As a preferred solution, the composite jacket metal oxide arrester further comprises a first fastener and a second fastener, the first fastener passes through the composite jacket and the winding layer in sequence, and is connected with the The resistance sheet is connected; the second fastener passes through the composite jacket and the winding layer in sequence, and is connected with the second electrode.

As a preferred solution, the first fastener is a bolt.

As a preferred solution, the second fastener is a bolt.

As a preferred solution, an umbrella skirt is provided on the outer surface of the composite jacket.

The utility model provides a metal oxide surge arrester with a composite jacket, which comprises a surge arrester body, a composite jacket, a disconnector and a connecting piece. The surge arrester body is accommodated in the composite jacket; the surge arrester body comprises resistor sheets that are stacked and connected in sequence , a first electrode, an insulating base and a second electrode, one end of the connector passes through the composite jacket and is connected to the first electrode; the disconnector includes a disconnector body, a high-voltage connection bolt, a low-voltage connection bolt and A grounding wire, one end of the disconnector body is connected to the grounding wire through the low-voltage connecting bolt, and the other end of the disconnecting body is connected to the other end of the connecting piece through the high-voltage connecting bolt. By arranging the connecting piece, making one end of the connecting piece pass through the composite casing and connecting with the first electrode, and at the same time connecting the other end of the connecting piece with the disconnector, the The connection between the arrester body and the disconnector makes it unnecessary to install the disconnector through an insulating bracket, effectively avoiding the design of an insulating bracket, and the composite jacketed metal oxide arrester has a simple structure and is easy to install, thus reducing the arrester’s cost. cost.

Description of drawings

FIG. 1 is a schematic structural diagram of a composite jacketed metal oxide arrester in an embodiment of the present invention.

Among them, 1, arrester body; 11, resistor sheet; 12, first electrode; 13, insulating base; 14, second electrode; 2, composite jacket; 21, umbrella skirt; 3, disconnector; 31, disconnector body; 32, grounding wire; 33, high voltage connection bolt; 34, low voltage connection bolt; 4, connecting piece; 5, winding layer; 6, first fastener; 7, second fastener.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present utility model, the descriptions of the orientations of up, down, left, right, front, rear, top and bottom are all defined with respect to FIG. 1 . When the placement method of the composite jacketed metal oxide arrester changes , the description of the corresponding orientation will also be changed according to the change of the placement method, and the present utility model will not be repeated here.

As shown in FIG. 1 , a metal oxide arrester with a composite jacket according to a preferred embodiment of the present invention includes an arrester body 1 , a composite jacket 2 , a disconnector 3 and a connecting piece 4 . The arrester body 1 is accommodated in the composite jacket 2 . Inside jacket 2;

The arrester body 1 includes a resistor sheet 11 , a first electrode 12 , an insulating base 13 and a second electrode 14 that are connected in sequence. One end of the connector 4 passes through the composite jacket 2 and is connected to the first electrode 12 . connect;

The disconnector 3 includes a disconnector body 31 , a high-voltage connecting bolt 33 , a low-voltage connecting bolt 34 and a ground wire 32 . One end of the disconnector body 31 is connected to the grounding wire 32 through the low-voltage connecting bolt 34 . The other end of the disconnector body 31 is connected to the other end of the connecting piece 4 through the high-voltage connecting bolt 33 .

In the embodiment of the present invention, by disposing the connecting piece 4 and making one end of the connecting piece 4 pass through the composite casing 2 and connect with the first electrode 12 , at the same time, the connecting piece 4 is The other end is connected with the disconnector 3, so as to realize the connection between the arrester body 1 and the disconnector 3, so that there is no need to install the disconnector through an insulating bracket, effectively avoiding the design of the insulating bracket, and the composite jacket The metal oxide arrester has a simple structure and is easy to install, thus reducing the cost of the arrester.

In addition, it should be noted that, through the cooperation of the resistance sheet 11 , the first electrode 12 , the connector 4 and the disconnector 3 , the abnormal current that occurs in the power system can be leaked into the ground, thereby protecting the power system in the power system. other devices; specifically, the abnormal current flowing through the disconnector 3 is leaked into the ground through the grounding wire 32, and the disconnector 3 has a withstand capability to ensure the safety of the composite jacketed metal oxide arrester normal work. The insulating base 13 provided can isolate the resistance sheet 11, the first electrode 12, the connector 4 and the disconnector 3, so that when the composite jacketed metal oxide arrester is installed in the power system, all the Describe the insulation properties of composite jacketed metal oxide arresters.

In the embodiment of the present invention, in order to achieve a firm connection between one end of the connector 4 and the first electrode 12 , in this embodiment, the first electrode 12 is provided with a first electrode on the side close to the composite jacket 2 . An installation hole, one end of the connecting piece 4 passes through the composite casing 2 and is connected in the first installation hole. The connection is realized by arranging the first mounting hole on the first electrode 12 and allowing one end of the connecting member 4 to pass through the composite casing 2 and be connected in the first mounting hole One end of the member 4 is connected to the first electrode 12 .

In the embodiment of the present invention, the type of the connector 4 can be set according to actual use requirements, and only needs to meet the requirements to ensure that the electrical connection between the first electrode 12 and the disconnector 3 can be achieved through the connector 4 . Just connect. In order to simplify the design and structure and reduce the cost, the connecting member 4 in this embodiment is a bolt.

In the embodiment of the present utility model, in order to enhance the mechanical strength of the composite jacketed metal oxide arrester, the composite jacketed metal oxide arrester in this embodiment further comprises a device located between the composite jacket 2 and the arrester body 1 The winding layer 5 in between, the winding layer 5 wraps the arrester body 1 . By arranging the wrapping layer 5 and wrapping the wrapping layer 5 around the arrester body 1, the effect of sealing is achieved, and at the same time, it can bear the mechanical force, thus enhancing the composite jacket metal oxide arrester mechanical strength. In addition, it should be noted that since the wrapping layer 5 is provided between the composite jacket 2 and the arrester body 1 , one end of the connector 4 passes through the composite jacket 1 and the wrapping layer 5 in sequence. , and then extends into the first installation hole and is connected with the first installation hole.

In the embodiment of the present invention, the formation method of the winding layer 5 can be set according to actual use requirements. In order to ensure that the mechanical strength of the composite jacket metal oxide arrester can be improved, and the design and structure can be simplified to reduce costs, in this embodiment, the winding layer 5 is formed of epoxy resin impregnated glass fiber.

As shown in FIG. 1, in order to facilitate the application of the composite jacketed metal oxide arrester in a power system, the composite jacketed metal oxide arrester in this embodiment further includes a first fastener 6 and a second fastener 7, The first fastener 6 passes through the composite outer casing and the winding layer 5 in sequence, and is connected to the resistance sheet 11; the second fastener 7 sequentially passes through the composite outer casing 1 and the The winding layer 5 is connected to the second electrode 14 . By arranging the first fasteners 6, the first fasteners 6 pass through the composite jacket and the winding layer 5 in sequence, and are connected with the resistance sheet 11, so that the composite The outer metal oxide arrester is connected to the outside through the first fastener 6, so as to leak abnormal current into the ground under the cooperation of the first fastener 6, the resistance sheet 11, the first electrode 12 and the disconnector 3 ; In addition, by setting the second fastener 7, and making the second fastener 7 pass through the composite jacket 1 and the winding layer 5 in turn, and connect with the second electrode 14, so as to facilitate The composite jacketed metal oxide arrester is fixed in the power system by the second fastener 7, so it is convenient for the composite jacketed metal oxide arrester to be applied in the power system.

In the embodiment of the present invention, in order to realize the firm connection between the first fastener 6 and the resistance sheet 11, in this embodiment, the top of the resistance sheet 11 is provided with a second mounting hole, the first The fasteners 6 pass through the composite jacket and the winding layer 5 in sequence, and then extend into the second installation holes and connect with the second installation holes, thereby realizing the first fasteners 6. A solid connection with the resistance sheet 11. At the same time, in order to achieve a firm connection between the second fastener 7 and the second electrode 14 , in this embodiment, the bottom of the second electrode 14 is provided with a third mounting hole, and the second fastener 7 passes through in sequence. Through the composite jacket 1 and the winding layer 5, it extends into the third installation hole and is connected with the third installation hole, thereby realizing the connection between the second fastener 7 and the third installation hole. Reliable connection of the two electrodes 14 .

In the embodiment of the present invention, the types of the first fasteners 6 and the second fasteners 7 can be set according to actual use conditions, and only need to meet the requirements to ensure that the composite jacket metal oxide arrester can pass through all The first fastener 6 and the second fastener 7 can be connected with external devices. In order to further simplify the design and structure and reduce the cost, in this embodiment, the first fastener 6 is a bolt; and/or the second fastener 7 is a bolt.

In the embodiment of the present invention, in order to improve the overall insulation performance of the composite jacket metal oxide arrester, the outer surface of the composite jacket 2 is provided with an umbrella skirt 21 in this embodiment. By arranging the shed 21 on the outer surface of the composite jacket 2, under the cooperation of the composite jacket 2 and the shed 21, the external insulation of the metal oxide arrester of the composite jacket can be enhanced, and at the same time, the outer insulation of the metal oxide arrester can be enhanced. The large creepage distance improves the ability to prevent pollution flashover, thereby improving the overall insulation performance of the composite jacket metal oxide arrester; in addition, under the cooperation of the composite jacket 2 and the shed 21, there are two secondary sealing effect.

In the embodiment of the present utility model, the working process of the composite jacketed metal oxide arrester is specifically:

When an abnormal voltage occurs in the power system, the composite jacketed metal oxide arrester will act immediately, and the abnormal current will sequentially pass through the first fastener 6, the resistance sheet 11, the first electrode 12 and the disconnector 3, and finally pass through the disconnector The ground wire 32 of 3 leaks abnormal current into the earth, thereby protecting other devices in the power system. When the composite jacket metal oxide arrester fails, the fault power frequency current flows through the arrester body 1 and the disconnector 3, so that within a certain period of time, the grounding end of the disconnector 3 is automatically disconnected. Therefore, the composite jacketed metal oxide arrester is isolated in the power system, and the further expansion of the accident is effectively prevented.

To sum up, the present invention provides a composite jacket metal oxide arrester, which includes an arrester body 1, a composite jacket 2, a disconnector 3 and a connecting piece 4. The arrester body 1 is accommodated in the composite jacket 2; the The arrester body 1 includes a resistor sheet 11 , a first electrode 12 , an insulating base 13 and a second electrode 14 that are stacked and connected in sequence, and one end of the connector 4 passes through the composite jacket 2 and is connected to the first electrode 12 ; The disconnector 3 includes a disconnector body 31 , a high-voltage connecting bolt 33 , a low-voltage connecting bolt 34 and a ground wire 32 . One end of the disconnector body 31 is connected to the grounding wire 32 through the low-voltage connecting bolt 34 . The other end of the disconnector body 31 is connected to the other end of the connecting piece 4 through the high-voltage connecting bolt 33 . By disposing the connecting piece 4 , one end of the connecting piece 4 passes through the composite casing 2 and is connected to the first electrode 12 , and the other end of the connecting piece 4 is connected to the disconnector 3 at the same time. connection, so as to realize the connection between the arrester body 1 and the disconnector 3, so that there is no need to install the disconnector through an insulating bracket, effectively avoiding the design of the insulating bracket, and the structure of the composite jacketed metal oxide arrester is simple, Easy to install, thus reducing the cost of the arrester.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and replacements can be made. These improvements And replacement should also be regarded as the protection scope of the present invention.

Claims (9)

1. a composite jacket metal oxide arrester, is characterized in that, comprises arrester body, composite jacket, disconnector and connector, and described arrester body is accommodated in described composite jacket; The arrester body includes a resistor sheet, a first electrode, an insulating base and a second electrode that are stacked and connected in sequence, and one end of the connector passes through the composite jacket and is connected to the first electrode; The disconnector includes a disconnector body, a high-voltage connection bolt, a low-voltage connection bolt, and a ground wire, one end of the disconnector body is connected to the ground wire through the low-voltage connection bolt, and the other end of the disconnector body is connected to the ground wire through the low-voltage connection bolt. The high-voltage connecting bolt is connected with the other end of the connecting piece. 2. The composite jacketed metal oxide arrester according to claim 1, wherein a first mounting hole is provided on the side of the first electrode close to the composite jacket, and one end of the connector passes through the The composite casing is connected in the first mounting hole. 3 . The composite jacketed metal oxide arrester according to claim 1 or 2 , wherein the connecting member is a bolt. 4 . 4. The composite jacketed metal oxide arrester according to claim 1 or 2, wherein the composite jacketed metal oxide arrester further comprises a winding layer arranged between the composite jacket and the arrester body, so that the The winding layer wraps the arrester body. 5 . The composite jacketed metal oxide arrester of claim 4 , wherein the winding layer is formed of epoxy resin impregnated glass fibers. 6 . 6. The composite jacketed metal oxide arrester according to claim 4, wherein the composite jacketed metal oxide arrester further comprises a first fastener and a second fastener, the first fasteners are sequentially Pass through the composite jacket and the winding layer, and connect with the resistance sheet; the second fastener passes through the composite jacket and the winding layer in sequence, and is connected with the second electrode. 7. The composite jacketed metal oxide arrester of claim 6, wherein the first fastener is a bolt. 8. The composite jacketed metal oxide arrester of claim 6, wherein the second fastener is a bolt. 9 . The composite jacket metal oxide arrester according to claim 1 or 2 , wherein an umbrella skirt is provided on the outer surface of the composite jacket. 10 .

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