Vacuum arc-extinguishing chamber test tool

Abstract

The utility model discloses a vacuum arc-extinguishing chamber test tool, which comprises a vacuum arc-extinguishing chamber, a static contact, a moving contact and a corrugated pipe are arranged in the vacuum arc-extinguishing chamber, and an insulating medium is filled in the vacuum arc-extinguishing chamber; the cover is arranged on the end face of the movable end of the vacuum arc-extinguishing chamber, the contact face of the cover and the vacuum arc-extinguishing chamber is chamfered, an adjusting device is arranged in the cover and connected with the movable end of the vacuum arc-extinguishing chamber, the adjusting device is adjusted to drive the movable contact to move downwards, and the movable end of the vacuum arc-extinguishing chamber is connected with the movable end of the vacuum arc-extinguishing chamber. And the static contact and the moving contact are pulled open to a rated distance. According to the tool, the contact surface of the cover and the vacuum arc-extinguishing chamber is designed to be a fillet, so that the cover is round in appearance, free of a tip end and neat in shape, the end face, in contact with the vacuum arc-extinguishing chamber, of the cover is round in shape, and the electric field of the vacuum arc-extinguishing chamber cannot be damaged due to uniform charge distribution on the tool when the tool is powered on.

Description

Technical Field

[0001] The utility model relates to the technical field of power switch equipment, in particular to a vacuum interrupter testing tool. Background Art

[0002] When conducting electrical performance tests in a vacuum interrupter, the moving and static contacts inside the chamber need to be pulled apart to the rated distance. Traditional test fixtures use cam arms to pull them apart. When power is turned on, the ends of the arms accumulate charges to produce uneven electric fields, affecting the external insulation of the vacuum interrupter. Since the insulation performance of the environmentally friendly gas currently used is not high, the uneven charge distribution on the test fixture when power is turned on will destroy the electric field of the vacuum interrupter. Utility Model Content

[0003] The utility model provides a vacuum interrupter testing tool, the purpose of which is to solve the above-mentioned problems existing in the background technology. The vacuum interrupter testing tool uses the screw principle to pull open the moving contact of the vacuum interrupter. The tool has a neat shape, and the end face in contact with the vacuum bubble is rounded. When power is turned on, the charge distribution on the tool is uniform and will not damage the electric field of the vacuum interrupter.

[0004] The technical solutions provided by this utility model are as follows:

[0005] A vacuum interrupter testing tool comprises a vacuum interrupter, wherein a static contact, a moving contact and a bellows are arranged in the vacuum interrupter, and the vacuum interrupter is filled with an insulating medium;

[0006] A cover is provided on the moving end face of the vacuum interrupter, the contact surface between the cover and the vacuum interrupter is chamfered, an adjusting device is provided inside the cover, the adjusting device is connected to the moving end of the vacuum interrupter, and the moving contact is driven to move downward by adjusting the adjusting device until the static contact and the moving contact are pulled apart to a rated opening distance.

[0007] Furthermore, a waist hole is provided on the peripheral side of the cover in the vertical direction;

[0008] The adjusting device includes a contact screw and a lead screw. One end of the contact screw is threadedly connected to the moving end of the vacuum arc extinguishing chamber, and the other end is provided with a light hole sleeve, in which the lead screw is inserted. A horizontal through hole is provided at the top end of the lead screw, and a pin is inserted into the through hole.

[0009] Furthermore, the adjusting device also includes an adjusting screw sleeve, which is arranged on the inner side of the lower end surface of the cover, and an internal threaded through hole is arranged inside the adjusting screw sleeve, and the lower end of the pin rod is threadedly connected to the adjusting screw sleeve.

[0010] Furthermore, a bearing is sleeved between the adjusting screw sleeve and the cover wall of the cover, the adjusting screw sleeve is fixed to the cover by a nut, and the outer end of the adjusting screw sleeve is an external hexagon.

[0011] Furthermore, a scale is provided on the outer wall of the cover corresponding to the position of the waist hole.

[0012] Furthermore, the vacuum interrupter is a 10-72.5 kV vacuum interrupter.

[0013] Furthermore, the cover as a whole is a cylindrical hollow structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The present application provides a vacuum interrupter test fixture, in which the contact surface between the cover and the vacuum interrupter is designed to be chamfered, so that the cover has a rounded shape without sharp edges and a neat shape, and the end surface in contact with the vacuum interrupter is rounded. When power is turned on, the charge on the fixture is evenly distributed and will not damage the electric field of the vacuum interrupter;

[0016] 2. The present application provides a vacuum interrupter test fixture, which pulls the moving contact and the stationary contact apart through an adjustment device consisting of an adjustment screw sleeve, a contact screw, a pin rod, and a screw rod. Since the pin rod can be inserted into the waist hole of the cover, the contact screw rod cannot rotate, so that the moving contact will not twist and damage the bellows when being pulled;

[0017] 3. The present application provides a vacuum arc chamber test tool. By setting a scale on one side of the waist hole, it is judged according to the scale whether the moving contact is pulled to the rated opening distance H. The test result is more accurate and the efficiency is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the vacuum interrupter test tooling in the embodiment of the utility model is schematically shown. Figure 1 ;

[0019] Figure 2 The structure of the vacuum interrupter test tooling in the embodiment of the utility model is schematically shown. Figure 2 ;

[0020] Figure 3 The schematic diagram of the structure of the cover in the embodiment of the utility model, wherein a is a schematic diagram of the overall structure of the cover, and b is a schematic diagram of the internal structure of the cover;

[0021] Figure 4 This is a schematic diagram of the structure when the static contact and the moving contact in the vacuum interrupter in the embodiment of the utility model are in contact;

[0022] Figure 5It is a structural schematic diagram when the static contact and the moving contact in the vacuum interrupter in the embodiment of the utility model are pulled apart to the rated opening distance.

[0023] The reference numerals are as follows:

[0024] 1- vacuum interrupter, 2- cover, 3- scale, 4- adjusting screw sleeve, 5- bearing, 6- nut, 7- contact screw, 8- pin rod, 9- screw rod, 10- waist hole, 11- static contact, 12- moving contact, 13- bellows. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the accompanying drawings is intended to represent only selected embodiments of the present application, and is not intended to limit the scope of protection claimed in the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0027] It should be understood that, in the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] See also Figure 1-Figure 5 The present application provides a vacuum interrupter test tool, including a vacuum interrupter 1, wherein a static contact 11, a moving contact 12, and a bellows 13 are arranged in the vacuum interrupter 1, and the vacuum interrupter 1 is filled with an insulating medium. In this embodiment, the insulating medium is an environmentally friendly gas. In other embodiments, the tool can also be used for testing vacuum interrupters filled with other types of insulating media.

[0030] The specific structure of the static contact 11, the moving contact 12 and the bellows 13 in the vacuum interrupter 1 is as follows: Figure 4 , Figure 5 As shown, it should be noted that the vacuum interrupter 1 used in the present application is a device frequently used in the prior art, and the present application does not improve the vacuum interrupter 1 itself, so the specific structure of the vacuum interrupter 1 will not be described here.

[0031] Cover 2, cover 2 is sealed and connected to the moving end face of the vacuum interrupter 1, and the contact surface between cover 2 and vacuum interrupter 1 is designed to be chamfered. As for the size of the chamfer, it can be set according to actual needs and is not limited here. By making a chamfer at the top of cover 2, the appearance of cover 2 is rounded without sharp edges, the shape is neat, and the end face in contact with vacuum interrupter 1 is rounded. When power is turned on, the charge distribution on the tooling is uniform and will not destroy the electric field of the vacuum interrupter. An adjusting device is arranged inside cover 2, and the adjusting device is connected to the moving end of the vacuum interrupter 1. By adjusting the adjusting device, the moving contact 12 is driven to move downward until the static contact 11 and the moving contact 12 are pulled apart to the rated opening distance.

[0032] like Figure 5 The figure shows a schematic diagram of the structure when the static contact 11 and the moving contact 12 are pulled apart to the rated opening distance H by the tooling (i.e., the opening diagram). Figure 4 It is a schematic diagram of the structure when the static contact 11 and the moving contact 12 are in contact (i.e., a closing diagram).

[0033] Optionally, a waist hole 10 is opened on the peripheral side of the cover 2 along the vertical direction.

[0034] The adjusting device comprises a contact screw 7 and a lead screw 9. One end of the contact screw 7 is threadedly connected to the moving end of the vacuum arc extinguishing chamber 1, and the other end is provided with a light hole sleeve, in which the lead screw 9 is inserted. A horizontal through hole is provided at the top of the lead screw 9, in which a pin 8 is inserted. There is no specific requirement for the size of the pin 8, and it can at least pass through the waist hole 10.

[0035] In the present application, one end of the contact screw 7 is an external threaded rod and the other end is a light hole sleeve, and a through hole is opened on the side of the light hole sleeve. One end of the screw 9 is a cylinder, which is inserted into the light hole of the contact screw 7. The cylinder has a through hole and passes through the contact screw 7. The other end is an external thread, which is screwed into the adjusting screw sleeve 4.

[0036] Optionally, the adjusting device further comprises an adjusting screw sleeve 4, wherein the adjusting screw sleeve 4 is arranged on the inner side of the lower end surface of the cover 2, an internal threaded through hole is arranged inside the adjusting screw sleeve 4, and the lower end of the pin rod 8 is threadedly connected to the adjusting screw sleeve 4.

[0037] Optionally, a bearing 5 is sleeved between the adjusting screw sleeve 4 and the cover wall of the cover 2, and the adjusting screw sleeve 4 is fixed to the cover 2 by a nut 6, and the outer end of the adjusting screw sleeve 4 is an outer hexagon. The screw rod 9 can be raised and lowered by the outer hexagon (hexagonal head) of the outer end of the adjusting screw sleeve 4.

[0038] In the present application, the adjusting screw sleeve 4 has a flange, which is placed on the inner side of the lower end surface of the cover 2. A bearing 5 is sleeved between the adjusting screw sleeve 4 and the cover wall of the cover 2. The part protruding from the bearing 5 is an external thread. The nut 6 is screwed on to fix the adjusting screw sleeve 4 on the cover 2. The end of the adjusting screw sleeve 4 is an external hexagon, and the inside of the adjusting screw sleeve 4 is an internal threaded through hole.

[0039] Optionally, a scale 3 is provided on the outer wall of the cover 2 corresponding to the position of the waist hole 10 .

[0040] The marking position of scale 3 is as follows Figure 3 As shown in a, Figure 3 a is a schematic diagram of the overall structure of the cover 2, Figure 3 b is a schematic diagram of the internal structure of the cover 2.

[0041] Optionally, the vacuum interrupter 1 is a 10-72.5 kV vacuum interrupter.

[0042] The screw rod structure design stroke mentioned in this application can meet the opening distance requirements of 10-72.5kV vacuum interrupter, achieving versatility.

[0043] Optionally, the cover 2 is a cylindrical hollow structure as a whole.

[0044] The working principle of the vacuum interrupter test tooling provided by the present application is as follows: the contact screw 7 is screwed into the internal thread of the moving end of the vacuum interrupter 1, the adjusting screw sleeve 4 and the screw 9 are pre-installed on the cover 2, the cover 2 is installed on the moving end face of the vacuum interrupter 1, the hexagonal head lifting screw 9 on the adjusting screw sleeve 4 is rotated, the screw 9 is inserted into the contact screw 7, the pin holes are aligned, and the pin 8 is inserted. The adjusting screw sleeve 4 is rotated, the screw 9 moves downward, the moving contact 12 is pulled open, and the moving contact 12 is judged according to the scale 3 whether it is pulled to the rated opening distance H. Since the pin 8 can be inserted into the waist hole 10 of the cover 2, the contact screw 7 cannot be rotated, ensuring that the moving contact 12 will not twist and damage the bellows 13 when it is pulled. Finally, the vacuum interrupter 1 with the tooling is placed in a test container, filled with environmentally friendly gas as an insulating medium, and connected to a high voltage test.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vacuum interrupter test tool, characterized in that: It comprises a vacuum interrupter chamber, wherein a static contact, a moving contact and a bellows are arranged in the vacuum interrupter chamber, and the vacuum interrupter chamber is filled with an insulating medium; A cover is provided on the moving end face of the vacuum interrupter, the contact surface between the cover and the vacuum interrupter is chamfered, an adjusting device is provided inside the cover, the adjusting device is connected to the moving end of the vacuum interrupter, and the moving contact is driven to move downward by adjusting the adjusting device until the static contact and the moving contact are pulled apart to a rated opening distance.

2. The vacuum interrupter testing tool according to claim 1, characterized in that: The circumferential side of the cover is provided with waist holes in the vertical direction; The adjusting device includes a contact screw and a lead screw. One end of the contact screw is threadedly connected to the moving end of the vacuum arc extinguishing chamber, and the other end is provided with a light hole sleeve, in which the lead screw is inserted. A horizontal through hole is provided at the top end of the lead screw, and a pin is inserted into the through hole.

3. The vacuum interrupter testing tool according to claim 2, characterized in that: The adjusting device also includes an adjusting screw sleeve, which is arranged on the inner side of the lower end surface of the cover. An internal threaded through hole is arranged inside the adjusting screw sleeve, and the lower end of the pin rod is threadedly connected to the adjusting screw sleeve.

4. The vacuum interrupter testing tool according to claim 3, characterized in that: A bearing is sleeved between the adjusting screw sleeve and the cover wall of the cover. The adjusting screw sleeve is fixed on the cover through a nut. The outer end of the adjusting screw sleeve is an outer hexagon.

5. The vacuum interrupter testing tool according to any one of claims 2 to 4, characterized in that: The outer wall of the cover is provided with a scale corresponding to the waist hole position.

6. The vacuum interrupter testing tool according to claim 5, characterized in that: The vacuum interrupter is a 10-72.5 kV vacuum interrupter.

7. The vacuum interrupter testing tool according to any one of claims 1 to 4, characterized in that: The cover is a cylindrical hollow structure as a whole.

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