Manual switching-on and switching-off test device for main contact of extra-high voltage arc extinguish chamber unit

Abstract

The utility model relates to the technical field of electrical tests of high-voltage combined electrical appliances, in particular to a manual opening and closing test device for a main contact of an extra-high-voltage arc extinguish chamber unit. The device comprises a sliding contact, a current collector and a contact support, the current collector is installed on the contact support, the sliding contact is inserted in the middle of the current collector, and the outer wall of the sliding contact makes contact with the current collector; the switch further comprises a main contact push-pull assembly, the main contact push-pull assembly comprises a push rod, a sliding contact connecting piece and a guide mechanism parallel to the axis of the sliding contact, the push rod is fixedly connected with one end of the sliding contact connecting piece, and the other end of the sliding contact connecting piece is connected with the sliding contact. And the push rod moves along the guide mechanism and is used for limiting the push-pull direction of the sliding contact. According to the utility model, the manual opening and closing test device is independently arranged for the main contact, the opening and closing test can be carried out after the main contact is assembled, the assembly quality of the main contact is checked, and timely adjustment is carried out when the assembly is poor or the test is unqualified, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical testing of high-voltage combined electrical appliances, and particularly relates to a manual opening and closing test device for the main contacts of a UHV arc extinguishing chamber unit. Background Art

[0002] With the commercial construction of high-voltage power grids in China, the power system's power transmission and transformation technology has been continuously developing and progressing. As the core of substation equipment, UHV combined electrical appliances are widely used, and the stability of their products is particularly important. As the "heart" of the combined electrical appliance, the assembly quality of the arc extinguishing chamber unit directly affects the quality of the entire combined electrical appliance. In recent years, due to frequent discharge accidents caused by poor assembly of the main contacts of the arc extinguishing chamber unit, the assembly quality of the main contacts directly affects the operation stability and service life of the equipment.

[0003] At present, after the overall assembly of the arc extinguishing chamber unit of the combined electrical appliance is completed, 180 times of electric opening and closing tests and 20 times of electric reclosing tests need to be carried out. After the above 200 tests are verified, the cover is opened for spot inspection to check the surface quality of the sliding area of the main contacts, whether there are scratches, foreign matter attachment, etc. If scratches are found, new contacts need to be replaced and the tests need to be carried out again. The above test device lacks a separate opening and closing test device for the main contacts and can only carry out electric tests after the overall assembly is completed. The test cycle is long, and problems in the assembly cannot be detected in time, easily resulting in rework and damage to parts and components, causing waste of labor and production materials. Summary of the Invention

[0004] In view of the above problems, the utility model proposes an idea of separately carrying out opening and closing tests on the sliding contacts immediately after the assembly of the main contacts, and designs a manual opening and closing test device for the main contacts, which can be connected to the assembled sliding contacts for manual opening and closing tests. If abnormalities are found, the test can be stopped immediately to avoid damage to parts, and the contact parts can be directly replaced when the sliding contacts are worn, avoiding waste caused by excessive disassembly and assembly.

[0005] The technical solution of the utility model is as follows:

[0006] A manual opening and closing test device for the main contacts of a UHV arc extinguishing chamber unit includes a sliding contact, a collector, and a contact support. The collector is installed on the contact support, the sliding contact is inserted in the middle of the collector, and the outer wall is in contact with the collector; it further includes a main contact pushing and pulling assembly, and the main contact pushing and pulling assembly includes a push rod, a sliding contact connecting piece, and a guiding mechanism parallel to the axis of the sliding contact. One end of the push rod is fixedly connected to the sliding contact connecting piece, and the other end of the sliding contact connecting piece is connected to the sliding contact; the push rod moves along the guiding mechanism to define the pushing and pulling direction of the sliding contact.

[0007] The utility model separately designs a set of manual closing and opening test device. After the main contact push-pull assembly is assembled, it is installed on one side of the sliding contact and connected to the sliding contact. The sliding contact is manually pushed and pulled for closing and opening tests. During the test, observe whether the movement track of the sliding contact is normal, whether there is abnormal damage between the sliding contact and surrounding components, and judge whether the assembly is in place. When abnormalities are found, the test can be stopped in time for adjustment. After a specified number of closing and opening tests with the collector electrons, check the wear condition of the sliding contact. If scratches occur, the sliding contact can be directly replaced. Since no overall assembly is carried out, the disassembly and assembly process can be greatly saved, and the work efficiency can be improved.

[0008] Preferably, the guiding mechanism includes two guide rods located on both sides of the sliding contact and rollers respectively located on the two guide rods. The axes of the two rollers are fixedly connected to both ends of the push rod. The two guide rods are parallel to the axis of the sliding contact. The push rod is slidably connected to the guide rods through the rollers. Under the limitation of the guide rods and rollers, it can be ensured that the push rod moves linearly along the axis of the sliding contact, preventing excessive extrusion and wear of the contact with the outer collector electrons due to left-right or up-down swinging. The guide rods also have a supporting and anti-rotation function.

[0009] Furthermore, the main contact push-pull assembly further includes two flexible ropes, which are respectively located on both sides of the sliding contact. One end of the flexible rope is connected to the contact bracket, and the other end is connected to the push rod, for limiting the outward pulling stroke of the sliding contact to prevent the sliding contact from being pulled out excessively. The flexible rope can preferably be a steel wire rope. A hanging ring is installed on the contact bracket in advance, and one end of the steel wire rope is tied to the hanging ring and connected to the contact bracket.

[0010] Preferably, the push rod is an I-shaped push rod. Its shorter cross arm is connected to the sliding contact connecting piece, and its longer cross arm is connected to the roller. The sliding contact connecting piece can be made into a disc shape. One end is connected to the short cross arm of the push rod through a bolt, and the other end can utilize the screw hole of the sliding contact itself and be inserted into the screw hole for threaded connection.

[0011] The utility model separately sets a manual closing and opening test device for the main contact. After the main contact is assembled, the closing and opening test can be carried out to inspect the assembly quality of the main contact, and timely adjustment can be made when the assembly is defective or the test is unqualified, solving the problems of low test efficiency and waste of manpower caused by disassembly and assembly after overall assembly, and improving the work efficiency. Brief Description of the Drawings

[0012] Figure 1 is a partial cross-sectional schematic view of the utility model;

[0013] Figure 2 is a state diagram during the test process of the utility model simulating closing;

[0014] Figure 3 is a state diagram during the test process of the utility model simulating opening;

[0015] In the figure, 1 is the contact support, 2 is the guide rod, 3 is the flexible rope, 4 is the roller, 5 is the hanging ring, 6 is the current collector, 7 is the sliding contact, 8 is the sliding contact connecting piece, and 9 is the push rod. Specific embodiments

[0016] The structure of the present utility model will be specifically described below with reference to the accompanying drawings.

[0017] A manual opening and closing test device for the main contact of a UHV arc extinguishing chamber unit, as Figure 1 , 2 shown, includes a sliding contact 7, a current collector 6, a contact support 1 and a main contact push-pull assembly. The current collector 6 is installed on the contact support 1. The sliding contact 7 is inserted in the middle of the current collector 6, and its outer wall is in contact with the current collector, and the two are electrically conductive. The main contact push-pull assembly includes an I-shaped push rod 9, a disc-shaped sliding contact connecting piece 8, and two guide rods 2 located on both sides of the sliding contact and parallel to its axis. The shorter cross arm of the push rod 9 is fixedly connected to one end of the sliding contact connecting piece 8 by bolts. The other end of the sliding contact connecting piece 8 is inserted into the screw hole of the sliding contact and is threadedly connected thereto. Each end of the longer cross arm of the push rod 9 is connected to a U-groove external thread roller 4. The roller 4 is located on the guide rod 2 and can slide along the guide rod. One end of the guide rod 2 is fixedly connected to the contact support 1 by bolts to prevent movement. Under the limitation and guidance of the guide rod and the roller, the push rod can perform a linear motion along the axis direction of the sliding contact, pushing and pulling the sliding contact to simulate the opening and closing actions. As Figure 2 shown, when the push rod pulls the sliding contact outward in the arrow direction, it simulates the closing operation; as Figure 3 shown, when the push rod pushes inward in the arrow direction, it simulates the opening operation.

[0018] To prevent the sliding contact from being completely pulled out when the push rod is pulled outward beyond the limited range, the present utility model is provided with a stroke limiting mechanism. That is, a flexible rope 3 is installed between the sliding contact and the guide rods on both sides. The flexible rope can be a steel wire rope with strong toughness. One end of the flexible rope 3 is connected to the hanging ring 5 installed on the contact support, and the other end is tied to the push rod 9. After fixing, the length of the flexible rope matches the maximum stroke when the sliding contact is closed.

[0019] After the present utility model is installed, as Figure 2 , 3 shown, repeat the opening and closing test multiple times. During the test process, observe whether the opening and closing process is normal. If an abnormality occurs, the test can be stopped immediately for adjustment. After reaching the specified number of opening and closing times, check whether the surface of the sliding contact is scratched. If the surface is smooth and unscratched, subsequent assembly can be carried out; if there are slight scratches on the surface, the contact can be directly removed for trimming. After trimming, perform the opening and closing test again until it meets the standard and then carry out subsequent assembly.

Claims

1. A manual opening and closing test device for main contacts of an ultra-high voltage arc extinguishing chamber unit, comprising a sliding contact (7), a collector (6) and a contact support (1), wherein the collector (6) is mounted on the contact support (1), the sliding contact (7) is inserted in the middle of the collector (6), and the outer wall is in contact with the collector; characterized in that: The invention also comprises a main contact push-pull assembly, which comprises a push rod (9), a sliding contact connector (8) and a guide mechanism parallel to the axis of the sliding contact, wherein the push rod (9) is fixedly connected to one end of the sliding contact connector (8), and the other end of the sliding contact connector (8) is connected to the sliding contact (7); the push rod (9) moves along the guide mechanism to limit the push-pull direction of the sliding contact.

2. The manual opening and closing test device for main contacts of the ultra-high voltage interrupter unit according to claim 1 is characterized in that: The guide mechanism comprises two guide rods (2) located on both sides of the sliding contact and rollers (4) respectively located on the two guide rods, and the axes of the two rollers (4) are fixedly connected to the two ends of the push rod (9).

3. The manual opening and closing test device for main contacts of the ultra-high voltage arc extinguishing chamber unit according to claim 1 is characterized in that: The main contact push-pull assembly also includes two flexible ropes (3), which are respectively located on both sides of the sliding contact. One end of the flexible rope (3) is connected to the contact bracket (1), and the other end is connected to the push rod (9), so as to limit the outward pulling stroke of the sliding contact.

4. The manual opening and closing test device for main contacts of the ultra-high voltage arc extinguishing chamber unit according to claim 1, 2 or 3, characterized in that: The push rod (9) is an I-shaped push rod, the shorter cross arm of which is connected to the sliding contact connector (8), and the longer cross arm is connected to the roller (4).

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