CN203179814U - Connecting device between middling pressure breaker contact arm and solid-sealed polar pole - Google Patents

Abstract

The utility model provides a connection device between a contact arm of a medium-voltage circuit breaker and a solid-sealed pole, which comprises a solid body (10). The pole end and the wall-touching end of the solid body (10) respectively have a protruding part (101, 102). And the protrusions (101, 102) all have threads. The solid body (10) has a shoulder (103) in the middle, and the shoulder (103) has two sides (1031) that are cut flat. The protruding parts (101, 102) at the pole end and the wall-touching end are respectively covered with at least one conical washer (11). The utility model improves the conductivity and reduces the tolerance requirements of the entire size chain.

Description

Connection device between contact arm and solid-sealed pole of medium voltage circuit breaker

technical field

The utility model belongs to the technical field of medium-voltage power products, in particular to a connection device between a contact arm and a solid-sealed pole in the technical field of medium-voltage circuit breakers.

Background technique

There are usually two ways to connect two parts: 1) Open a hole on one of the parts, open a thread on the other part, and then use bolts to lock the two parts. 2) Holes are opened on both parts, and then the two parts are locked with bolts and nuts by hand.

As shown in Figure 1, in the above-mentioned first type of existing circuit breaker design, as shown in the figure, there is a through hole in the entire contact arm, and the bolts are locked from left to right in the threaded holes on the solid-sealed pole on the right in.

The above-mentioned existing technical solution has the following main problems: because there is a through hole in the middle, the contact arm of the circuit breaker is in small contact with the solid-sealed pole, and in the case of using copper material, the conductivity can meet the requirements, but the After the aluminum material, the conductivity becomes worse. Regardless of the material used, its electrical conductivity is not optimal.

Utility model content

The purpose of this utility model is to provide a connection device between the contact arm and the solid-sealed pole of a medium-voltage circuit breaker, which includes a solid body. The pole end and the wall-touching end of the solid body have a protrusion respectively, and the protrusions There are threads.

According to a preferred embodiment of the invention, the solid body has a shoulder in the middle, and the shoulder has two sides that are cut flat.

According to a preferred embodiment of the present invention, at least one washer is sheathed on the protruding parts of the pole end and the wall-contacting end.

According to the best embodiment of the utility model, the gasket is a tapered gasket, and preferably, two gaskets are sheathed on the protruding part of the end contacting the wall.

In the connection device between the contact arm of the medium voltage circuit breaker and the solid-sealed pole of the utility model, since the through hole is removed, the contact between the contact arm of the circuit breaker and the solid-sealed pole increases, and the electrical conductivity is improved no matter whether copper material or aluminum material is used. can meet the requirements. Satisfy the requirement of electrical conductivity under the aluminum material, and can greatly reduce the cost. In the case of using copper material, the conductivity is improved, which also improves the performance of the circuit breaker.

Description of drawings

Fig. 1 is a structural schematic diagram of the connection device between the contact arm and the solid-sealed pole of the existing medium-voltage circuit breaker;

Fig. 2A-2B is a structural diagram of a best embodiment of the connection device between the contact arm and the solid-sealed pole of the medium voltage circuit breaker of the present invention; wherein Fig. 2A is a sectional view after connection, and Fig. 2B is a perspective view of the connection device;

Fig. 3 is a structural schematic diagram of another best embodiment of the connection device between the contact arm and the solid-sealed pole of the medium voltage circuit breaker of the present invention.

Detailed ways

Hereinafter, with reference to the accompanying drawings, a specific description of alternative embodiments of the present invention is given.

Figure 2A-2B is a structural schematic diagram of a best embodiment of the connection device between the contact arm of the medium voltage circuit breaker and the solid-sealed pole of the utility model; wherein, Figure 2A is a sectional view after connection, and Figure 2B is a perspective view of the connection device, It comprises a solid main body 10, the pole end and the wall-contacting end of the solid main body 10 respectively have a protruding part 101, 102, and the protruding parts 101, 102 are threaded.

According to a preferred embodiment of the present invention, the solid body 10 has a shoulder 103 in the middle, and the shoulder 103 has two sides 1031 that are cut flat. Preferably, the two side surfaces 1031 (the other side is not shown in the figure) are parallel cut surfaces, which are used to apply moment when installing the connecting device.

According to the preferred embodiment of the present utility model, the protruding parts 101, 102 of the pole end and the wall-contacting end are each covered with at least one gasket 11, such as a tapered gasket. Preferably, two pads are set on the protruding part 101 of the wall-contacting end Sheet 11.

As shown in Figure 2A, a tapered gasket is used between the stud and the pole, but there will be two gaskets installed back-to-back between the contact arm and the stud bolt. This solution also needs to meet the requirements of the contact arm and the stud bolt. The gap between the stud bolts needs to be thicker than the thickness of the two gaskets (otherwise the following problem will occur: the contact arm is not in contact with the outlet terminal of the pole), but smaller than the original height of the two gaskets ( Otherwise the gasket will not be compressed at all and will not be able to relax). However, there is a 2mm space for the two gaskets to absorb the processing error.

Fig. 3 is a structural schematic diagram of another best embodiment of the connection device between the contact arm and the solid-sealed pole of the medium voltage circuit breaker of the present invention. Put a tapered spacer on each side of the stud bolt, and first lock it on the pole with the stud bolt, then the spacer between them will be flattened. There will be another tapered gasket between the stud bolt and the contact arm: as shown in the figure below, the gap between the contact arm and the stud bolt needs to be thicker than the thickness of a gasket, otherwise the following problems will occur : The contact arm is not in contact with the outlet terminal of the pole, but it is smaller than the original height of a gasket, otherwise the gasket will not be compressed at all, and thus will not be able to relax; then the original length of a gasket is shorter than the crushed length Only 1mm larger, so this solution has relatively high tolerance requirements for the entire dimensional chain such as the hole depth of the contact arm and the step height of the stud bolt.

In the connection device between the contact arm of the medium voltage circuit breaker and the solid-sealed pole of the utility model, since the through hole is removed, the contact between the contact arm of the circuit breaker and the solid-sealed pole increases, and the electrical conductivity is improved no matter whether copper material or aluminum material is used. get improved. In addition, the use of two tapered spacers reduces the tolerance requirements of the entire dimensional chain.

Although the preferred embodiment of the utility model and accompanying drawings are disclosed for the purpose of illustration, those skilled in the art can make various replacements, Variations and retouching. Therefore, the utility model should not be limited to the content disclosed in the preferred embodiments and drawings, and the scope of protection of the utility model should be defined by the appended claims.

Claims (5)

1. A connection device between contact arm and solid-sealed pole of a medium-voltage circuit breaker, comprising a solid body (10), characterized in that: the pole end and the wall-touching end of the solid body (10) respectively have a protruding part (101, 102 ), and the protrusions (101,102) are threaded. 2. The connection device between contact arm and solid-sealed pole of a medium voltage circuit breaker according to claim 1, characterized in that: there is a shoulder (103) in the middle of the solid body (10), and the shoulder (103) has a Cut both sides flat (1031). 3. The connection device between the contact arm and the solid-sealed pole of a medium-voltage circuit breaker according to claim 1, characterized in that: the protruding parts (101, 102) of the pole end and the wall contact end are respectively covered with at least one gasket (11) . 4. The connection device between the contact arm and the solid-sealed pole of the medium voltage circuit breaker according to claim 3, characterized in that: the gasket (11) is a conical gasket. 5. The connection device between the contact arm and the solid-sealed pole of a medium-voltage circuit breaker according to any one of claims 1-4, characterized in that: two back-to-back pads are set on the protruding part (101) of the contact wall end slices (11).

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