CN104330729B - A kind of arc-chutes divide-shut brake detecting tool of breaker - Google Patents

Abstract

The invention discloses an opening and closing detection tool for an arc extinguishing chamber of a circuit breaker. The tooling is equipped with a support seat on the transmission box of the circuit breaker, and a screw and a nut are installed on the support seat to form a screw transmission mechanism to realize power input, so that the dynamic and static contacts in the arc extinguishing chamber of the circuit breaker need to be adjusted. During the detection of opening and closing actions, by manually rotating the nut, the lead screw drives the power input end of the moving contact through the traction structure, which has the effect of manually controlling the opening and closing actions of the arc extinguishing chamber of the circuit breaker, and because the screw The rotation of the nut in the transmission mechanism is not only accurate, but also the speed is very easy to control, so that not only can the opening and closing process of the dynamic and static contacts be observed in a timely manner, but also the precise screw transmission will make it easier to measure the opening and closing position, so the The detection tool will make the detection of the opening and closing action of the interrupter more convenient, more accurate and easier to observe.

Description

Opening and closing detection tool for an arc extinguishing chamber of a circuit breaker

technical field

The invention relates to the field of assembly detection of a circuit breaker, in particular to an opening and closing detection tool for an arc extinguishing chamber of a circuit breaker.

Background technique

At present, with the continuous development of high-voltage circuit breaker technology, more and more high-voltage power transmission fields have higher and higher reliability requirements for the opening and closing actions of circuit breakers. During the assembly process of the arc chamber, the opening and closing actions of the dynamic and static contacts must be stable and reliable, especially for the ZF27/LW55-800kV circuit breaker. High, and after the assembly of the arc extinguishing chamber is completed, the resistance and other data of the arc extinguishing chamber need to be tested. When there is a problem with the detection of the centering accuracy of the dynamic and static contacts and the resistance measurement of the circuit breaker, the repair process of the circuit breaker will be very time-consuming and laborious, which will increase the difficulty and labor intensity of the inspection and repair of the interrupter chamber of the circuit breaker. In addition, when the finished product of the circuit breaker is directly installed on the operating mechanism for performance testing of the arc extinguishing chamber, the opening and closing actions transmitted by the operating mechanism to the moving contacts will make the moving and static contacts quickly complete the opening and closing. This will not be conducive to the detection of the electric field status of the arc extinguishing chamber during the opening and closing process of the dynamic and static contacts, which will increase the difficulty of detecting the arc extinguishing chamber of the circuit breaker, and will make the dynamic and static state of the arc extinguishing chamber of the circuit breaker Contact damage will cause heavy losses.

Contents of the invention

The object of the present invention is to provide an opening and closing detection tool for an arc extinguishing chamber of a circuit breaker, which aims to solve the problem in the prior art that the detection process of the arc extinguishing chamber of a circuit breaker is time-consuming and laborious after assembly.

In order to achieve the above objectives, the technical scheme of the opening and closing detection tool for the interrupter of the circuit breaker in the present invention is as follows:

The opening and closing detection tool of the arc extinguishing chamber of the circuit breaker includes a support seat for detachable fixing on the transmission box of the circuit breaker and a lead screw for extending into the arc extinguishing chamber of the circuit breaker. The lead screw that the lead screw passes through is perforated. One end of the lead screw is provided with a traction structure for connecting to the power input end of the moving contact, and the other end is screwed with a suitable nut. The nut rotates axially around the lead screw and is assembled on the support On the seat, and between the nut and the support seat, there is a limiting structure for preventing the nut from moving relative to the support seat in the axial direction.

The limit structure includes a limit shoulder protruding from the outer periphery of the nut and a limit step provided on the support seat, and the limit shoulder and the limit step stop the axial limit of the nut.

A bearing is assembled between the limit step and the limit shoulder, the inner ring of the bearing is set on the outer periphery of the nut, and the outer ring is assembled on the support seat.

There are two limit steps, and they are located on opposite sides of the axial upper limit shoulder of the nut. Between the two limit steps, there is a sleeve body located on the outer periphery of the nut. The sleeve body and the two limit steps form a space for the nut. Assembled installation cavity, the installation cavity communicates with the lead screw through hole

A force applying member for driving the nut to rotate is connected to the outer periphery of the nut.

The force application part is a force application handwheel fixedly connected on the nut, the inner ring of the force application handwheel is set and fixed on the outer periphery of the nut, and the outer ring of the force application handwheel is fixedly connected to the periphery of the inner ring through a reinforcing rib.

The support seat includes a support plate for detachable fixing on the transmission box of the circuit breaker and a limit cap fixed on the support plate. The screw hole passes through the limit cap and the support plate, and the nut limits bit assembled in the limit cap

The limit cap includes a sleeve body fixed on the support plate, the axial direction of the sleeve body is perpendicular to the plate surface of the support plate, and the end of the sleeve body away from the support plate is provided with an inversion extending along the axial direction and stopping on one side of the nut. along.

The supporting plate is a circular plate or a regular polygonal plate body, the axis of the limiting cap coincides with the center line of the limiting plate, and the limiting cap and the nut are arranged coaxially.

The traction structure includes a traction piece fixed at the end of the lead screw, and the traction piece is provided with a connection structure for detachable and fixed connection with the power input end of the moving contact.

The present invention realizes the power input by installing a supporting seat on the transmission box of the circuit breaker, and installing a screw and a nut on the supporting seat to form a screw transmission mechanism, so that the dynamic and static contacts in the arc extinguishing chamber of the circuit breaker need to be controlled. When detecting the opening and closing action, by manually rotating the nut, the lead screw drives the power input end of the moving contact to act through the traction structure, which has the effect of manually controlling the opening and closing action of the interrupter of the circuit breaker, and because the screw The rotation of the nut in the transmission mechanism is not only accurate, but also the speed is very easy to control, so that not only can the opening and closing process of the dynamic and static contacts be observed in a timely manner, but also the precise screw drive will make the position of the opening and closing easier to measure. In the prior art, it is necessary to install the whole set of circuit breaker on the operating mechanism and then detect the detection means. The detection tool in the present invention will make the detection of the opening and closing action of the arc extinguishing chamber more convenient, more accurate and easy to observe.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is a partial enlarged view of A in Fig. 1 .

detailed description

Embodiment of the opening and closing detection tool of the interrupter of the circuit breaker in the present invention: as shown in Figure 1 and Figure 2, the detection tool is a ZF27/LW55-800 circuit breaker 6 interrupter slow opening and closing tool, It consists of two parts, the support base 1 and the transmission mechanism. The transmission mechanism is a screw transmission mechanism of the sliding lead screw nut pair type, including a sliding nut 2 mounted in the support base 1 and a lead screw 3 adapted to the sliding nut 2 around an axis extending up and down. The inner wall of the sliding nut 2 is threadedly connected to the outer circumference of the lead screw 3, the outer circumference of the lower section of the sliding nut 2 is protruded with an annular limit shoulder, and the upper section of the sliding nut 2 is fixedly connected with the force applying handwheel above the support seat 1 4. The upper section of the leading screw is threaded in the sliding nut 2, and the lower section of the leading screw 3 is detachably connected to the power input end of the moving contact through the connecting piece 5.

The supporting base 1 is formed by connecting a supporting plate 11 and a limit cap 12 . Support plate 11 is the flange plate that is detachably fixed on the transmission box of circuit breaker 6, and the perforation of support plate 11 central parts is the leading screw 3 perforation that feeds the lead screw along the vertical direction to wear. The limit cap 12 is coaxially fixed on the geometric center of the support plate 11. The limit cap 12 is divided into a fixed section, a casing section and a retaining section from bottom to top, wherein the casing section is coaxially set on the lower section of the sliding nut 2 On the outer circular sleeve; the fixed section is an annular downturned edge that is located on the lower edge of the sleeve body section and is turned outward, and the downturned edge is detachably fixed on the support plate 11 through a flange connection; the retaining edge section is the sleeve body section The upper end of the upper end is provided with an inward-turning edge, and the lower side step of the inner-turning edge stops on the upper side of the limiting shoulder to form an upper limit step that is limited and stopped above the limiting step. The inner diameter of the sleeve body section is larger than the hole diameter of the lead screw 3 perforation, thereby forming a lower limit step that stops below the limit shoulder at the position along the upper end hole of the lead screw perforation. Bearings are respectively assembled between the upper limit step and the limit shoulder and between the lower limit step and the limit shoulder, the inner ring of the bearing is set and fixed on the outer periphery of the sliding nut 2, and the outer ring of the bearing is assembled on the casing section on the inner wall surface. The upper limit step, the sleeve body section and the lower limit step form an installation cavity for the lower section of the sliding nut 2 to be loaded into, and the installation cavity communicates with the leading screw 3 through holes.

The upper part of the sliding nut 2 protrudes from the upper end of the limit cap 12, and the protruding part is fixedly connected on the force application member. The force-applying handwheel 4 includes an inner ring fixedly fitted on the outer periphery of the lead screw 3 and an outer ring fixedly connected to the outer periphery of the inner ring by reinforcing ribs. When in use, the user exerts force by holding the outer ring tightly so that the inner ring The ring drives the sliding nut 2 to rotate.

The connecting piece 5 is a connecting block fixed on the power input ends of the two moving contacts by bridging. The edge of the wing is provided with a bolt through hole for bolt connection with the input end, so that the connecting piece 5 is detachably connected to the power input end of the moving contact through bolt connection.

This embodiment uses a screw transmission mechanism of the sliding screw nut pair type, and uses the sliding nut 2 and the bearing to realize the circular rotation of the nut, so that the screw 3 can move up and down, and the lower end of the screw 3 is connected with a ZF27/LW55-800kV circuit breaker. 6. The transmission device of the transmission box of the arc extinguishing chamber is connected, and the up and down movement of the lead screw 3 can replace the insulating rod for transmission. Therefore, no mechanism is needed, and the moving and static contacts of the arc extinguishing chamber can be separated and closed by turning the nut with the handle. operate.

When in use, first connect the connector 5 to the power input end in the circuit breaker 6, and then use the force-applying hand wheel 4 to carry out the transfer operation, which can drive the sliding nut 2 to perform circular sliding on the bearing of the device, and the sliding nut 2 The rotation movement makes the lead screw 3 move up and down axially, so as long as the support base 1 is fixed on the transmission box of the circuit breaker 6, the movement of the lead screw 3 can be used to simulate the insulation of the ZF27/LW55-800kV circuit breaker 6. The movement mode of the pull rod realizes the opening and closing action of the moving and static contacts of the product. The dynamic and static contact opening and closing operations of the arc extinguishing chamber are performed manually, which facilitates the alignment detection, resistance measurement, just-fit point measurement and other related items during the assembly process of the product.

In the above embodiments, the sliding nut and the lead screw form a sliding screw nut pair. In other embodiments, the sliding screw nut pair can also be replaced by a screw transmission mechanism such as a ball screw nut pair, a static pressure screw nut pair, etc. .

In the above-mentioned embodiments, the axial limit between the nut and the support seat is realized by means of a limit shoulder on the nut and two limit steps on the support seat. In other embodiments, the limit shoulder is also There can be two, and the corresponding limit step can also be one.

Claims (7)

1. the arc-chutes divide-shut brake detecting tool of breaker, it is characterised in that including for the removable transmission for being fixed on breaker Support base on casing and for the leading screw in the arc-chutes for stretching into breaker, offers the leading screw passed through for leading screw on support base Perforation, one end of leading screw is provided with and is installed with adaptation for the hitch structure that is connected on the power intake of moving contact, the other end Nut, nut is assemblied on support base around leading screw axial rotation, and is provided with for preventing nut between nut and support base Axially with respect to the position limiting structure of support base movement, position limiting structure includes the spacing convex shoulder of projection and support on the periphery of nut The limited step set on seat, spacing convex shoulder and limited step nut axial limiting block, limited step and spacing convex shoulder Between be equipped with bearing, the inner ring of bearing is sleeved on the periphery of nut, outer ring is assemblied on support base, and limited step has two It is individual, and the axial upper limit convex shoulder in nut opposite both sides, the body in nut periphery is provided between two limited steps Portion, sheath body portion and two limited steps form the installation cavity for nut assembling, and installation cavity is connected with leading screw perforation.

2. the arc-chutes divide-shut brake detecting tool of breaker according to claim 1, it is characterised in that on the periphery of nut It is connected with the force-applying piece for driving nut to rotate.

3. the arc-chutes divide-shut brake detecting tool of breaker according to claim 2, it is characterised in that force-applying piece is connected Force handwheel on nut, the inner ring suit of the handwheel that exerts a force is fixed on the periphery of nut, and the outer shroud of the handwheel that exerts a force is by adding Strong muscle is connected in the periphery of inner ring.

4. the arc-chutes divide-shut brake detecting tool of breaker according to claim 1, it is characterised in that support base includes using In the supporting plate on the removable transmission case body for being fixed on breaker and fixed limited cap on the supporting plate, the leading screw perforation is passed through Limited cap and supporting plate are worn, the nut is spacing vertically to be assemblied in limited cap.

5. the arc-chutes divide-shut brake detecting tool of breaker according to claim 4, it is characterised in that limited cap includes solid Fixed body on the supporting plate, the axial direction of body and the plate face of supporting plate are vertical, and one end away from supporting plate of body is provided with edge Turn edge of the axially extending block in the side of nut.

6. the arc-chutes divide-shut brake detecting tool of breaker according to claim 4, it is characterised in that supporting plate is plectane Or regular polygon plate body, the axis of limited cap and the center line of limiting plate overlap, and limited cap and nut are coaxially disposed.

7. the arc-chutes divide-shut brake detecting tool of breaker according to claim 1, it is characterised in that hitch structure includes Be fixed on the traction piece of leading screw end, traction piece be provided with for the removable connected connection knot of the power intake of moving contact Structure.