CN201590371U - Quick ground switch device - Google Patents

Abstract

A quick grounding switch device in the field of high-voltage switch technology, comprising: a casing, a crank arm, a moving contact, a contact seat and a guide sleeve, wherein the turning arm is rotatably arranged in the casing and is movably connected with one end of the moving contact, and the guiding The sleeve is sleeved on the outside of the movable contact and fixedly connected with the contact seat, and the contact seat is fixedly arranged in the shell. The utility model reduces the transmission link and improves the performance of the fast grounding switch device.

Description

Quick Earth Switching Device

technical field

The utility model relates to a device in the technical field of high-voltage switches, in particular to a fast grounding switch device.

Background technique

The fast earthing switch device is a component of the gas-insulated metal-enclosed combined electrical appliance GIS. It is arranged on the side of the outgoing line isolating switch of the outgoing line circuit. It has two functions: opening and closing the capacitive current generated by electrostatic induction and electromagnetic induction in parallel overhead lines. Inductive current; when creepage occurs on the insulator inside the casing or arcing occurs inside the casing, the fast grounding switch quickly grounds the main circuit, and the fault current is cut off by the circuit breaker.

There are many types of fast grounding switch devices currently on the market, most of which use multi-stage transmission of connecting rods to realize the transmission of input work, which are relatively large in size and high in cost.

After searching the existing technology, it was found that Chinese Patent Publication No. CN201122523 records a "quick grounding switch for high-voltage electrical appliances". In this technology, the movable contact rod is connected to the outer It is connected with the transmission shaft of the electric spring operating mechanism. Driven by the external electric spring operating mechanism, through the transmission shaft, the second connecting plate, and the first connecting plate, it drives the cooperation between the moving contact rod and the static contact seat assembly to realize the opening and closing functions. However, in this prior art, the two ends of the first connecting plate each have a limiter respectively connected to the transmission shaft and the moving contact rod. There are too many transmission links and the movement reliability is poor. During the movement, if the two limiters interact with each other If the fit is not accurate, it is easy to cause the position of the first connecting plate to be stuck, and in severe cases, it will be broken. In order to prevent this incident from happening less, it is necessary to improve the matching accuracy between the first connecting plate, the transmission shaft and the second connecting plate, so that the material properties and machining accuracy of the parts must be improved, and the final result will lead to an increase in the cost of the product. There are many transmission links, and the required space volume is also large, which will also increase the product cost.

Utility model content

The utility model aims at the above-mentioned shortcomings in the prior art, and provides a fast grounding switch device, which reduces the transmission links and improves the performance of the fast grounding switch device.

The utility model is realized through the following technical solutions. The utility model includes: a casing, a crank arm, a movable contact, a contact seat and a guide sleeve, wherein the crank arm is rotatably arranged in the casing and is movably connected with one end of the movable contact , the guide sleeve is sleeved on the outside of the movable contact and fixedly connected with the contact seat, and the contact seat is fixedly arranged in the shell.

The moving contact is provided with a fork, which is connected to the crank arm in rotation.

An insulating sleeve is provided at the position where the contact seat is in contact with the shell.

The clamping fork is a two-body bolt-like structure, and the top of the clamping fork is provided with two opposite horizontal guide holes, and the end of the crank arm is provided with a pin shaft of a corresponding shape to contact and connect with the horizontal guide holes.

There are two guide sleeves, which are respectively arranged on the top and bottom of the contact seat.

Compared with the prior art, the utility model adopts the limitation of the crank arm and the clamping fork, so that the moving track of the moving contact is limited in the middle of the shell, which ensures a good moving track, thereby improving the speed of the quick grounding switch. Mechanical properties of the device.

Description of drawings

Fig. 1 is a schematic diagram of opening of the utility model.

Fig. 2 is a schematic diagram of closing of the utility model.

Figure 3 is a schematic diagram of the fork.

Detailed ways

The following is a detailed description of the embodiments of the present utility model. This embodiment is implemented on the premise of the technical solution of the present utility model, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present utility model is not limited to the following the described embodiment.

As shown in Figure 1, this embodiment includes: a casing 1, a crank arm 2, a movable contact 3, a contact seat 4 and a guide sleeve 5, wherein: the crank arm 2 is rotatably arranged in the casing 1 and is connected with the movable contact 3 One end is movably connected, the guide sleeve 5 is sleeved on the outside of the movable contact 3 and fixedly connected with the contact seat 4 , and the contact seat 4 is fixedly arranged in the shell 1 .

The moving contact 3 is provided with a clamping fork 6, and the clamping fork 6 is rotatably connected with the crank arm 2.

The position where the contact base 4 is in contact with the housing 1 is provided with an insulating sleeve 7 .

As shown in Figures 1 and 3, the clamp fork 6 is a two-body bolt-like structure, and the top of the clamp fork 6 is provided with two opposite horizontal guide holes 8, and the end of the crank arm 2 is provided with a corresponding shape. The bearing pin 9 is connected with the horizontal guide hole 8 in contact.

There are two guide sleeves 5, which are respectively arranged on the top and bottom of the contact base 4.

As shown in Figure 2, when the crank arm 2 swings up and down, the pin shaft 9 can have a certain horizontal movement space in the horizontal guide hole 8 on the clamp fork 6, which effectively reduces the impact on the clamp fork when the crank arm 2 moves up and down. Because the clamp fork 6 and the moving contact 3 are connected as a whole, that is to say, the horizontal thrust on the moving contact 3 is reduced, so that the moving contact 3 is mainly subject to the vertical downward component force, thereby ensuring that the moving contact 3 moves vertically up and down, and the up and down movement of the movable contact 3 is completed in the space defined by the contact seat 4 and the guide sleeve 5. In this way, for the movable contact 3, the force is vertically up and down, and the space position is limited in the middle of the shell 1, which ensures a good movement track, thereby improving the mechanical characteristics of the quick earthing switch device.

Claims (5)

1. high speed grounding switch device, it is characterized in that, comprise: shell, connecting lever, moving contact, contact base and fairlead, wherein: connecting lever rotates and is arranged in the shell, and flexibly connect with an end of moving contact, fairlead is socketed on outside the moving contact, and fixedlys connected with contact base, and contact base is fixedly set in the shell.

2. high speed grounding switch device according to claim 1 is characterized in that described moving contact is provided with bracket, and this bracket and connecting lever are rotationally connected.

3. high speed grounding switch device according to claim 1 is characterized in that, the contacted position of described contact base and shell is provided with insulating case.

4. high speed grounding switch device according to claim 2, it is characterized in that, described bracket is for being catamaran type bolt shape structure, and the top of this bracket is provided with two relative horizontally-guided holes, and the bearing pin that described connecting lever end is provided with correspondingly-shaped is connected with the contact of horizontally-guided hole.

5. high speed grounding switch device according to claim 1 is characterized in that, described fairlead has two, is arranged at the top and the bottom of contact base respectively.

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