U70BL type suspension insulator batch AC voltage withstand test platform

Abstract

The utility model discloses a U70BL type suspension insulator batch AC withstand voltage test platform, which comprises an upper platform surface, a lower platform surface and four support legs, the upper platform surface and the lower platform surface are both made of conductive stainless steel materials, the support legs are made of epoxy resin materials, and the upper platform surface and the lower platform surface are both provided with test binding posts used for test wiring; a U70BL type suspension insulator ball head is arranged on the lower surface of the upper table top and is used for hanging a tested insulator during a test; the upper surface of the lower table top is provided with a U70BL type suspension insulator cap nest with a chain, and the U70BL type suspension insulator cap nest is used for fixing a tested insulator during a test. According to the utility model, the alternating current withstand voltage test can be carried out on 18 U70BL type suspension insulators at one time, and the alternating current withstand voltage test is convenient and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of insulator AC withstand voltage test devices, in particular to a U70BL type suspension insulator batch AC withstand voltage test platform. Background Art

[0002] U70BL suspension insulators are widely used in power systems. In order to examine the insulation performance of the insulators and ensure the quality of the project during the installation and replacement of this type of insulators, they should be subjected to an AC withstand voltage test of 60kV before installation and replacement in accordance with GB 50150 "Test Standard for Acceptance of Electrical Equipment in Electrical Installation Projects".

[0003] In the past, three test methods were used to examine the insulation performance of installed insulators:

[0004] (1) According to the line insulation requirements, several insulators are connected in series into an insulator string, and the insulator string is subjected to an AC withstand voltage test. This method requires large-scale test equipment to meet the higher test voltage, and the number of insulators in the insulator string is generally redundant, retaining a certain insulation margin. When the insulation performance of individual insulators is unqualified, the AC withstand voltage test of the insulator string may still be qualified. Therefore, through this method, the staff cannot grasp the insulation margin of the insulator string, and it affects the measurement of the average annual degradation rate of the insulators after 3 years of operation, which in turn affects the determination of the detection cycle of low (zero) value insulators during normal operation of the line.

[0005] (2) Insulators are randomly inspected at a certain ratio (e.g. 10%). In a project, hundreds or even thousands of insulators are installed and replaced, so random inspection is a convenient method. However, this method cannot guarantee the insulation performance of each insulator, so there are certain safety risks, and it also affects the measurement of the average annual degradation rate of insulators after three years of operation.

[0006] (3) Perform AC withstand voltage tests on each insulator. This method can ensure the insulation performance of each insulator, does not affect the subsequent operation and maintenance, and meets the standard requirements. However, due to the large number of insulators, testing each insulator is time-consuming and laborious.

[0007] In order to solve the problem of AC withstand voltage test before installation and replacement of U70L suspension insulators, an AC withstand voltage test platform for insulators was studied. The test bench can meet the requirements of convenient and efficient test and is of great significance for on-site production. Summary of the invention

[0008] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a U70BL type suspension insulator batch AC withstand voltage test platform to meet the requirements of convenient and efficient AC withstand voltage test before insulator installation and replacement.

[0009] In order to solve the above technical problems, the utility model adopts the following technical scheme: a U70BL type suspension insulator batch AC withstand voltage test platform, comprising an upper table, a lower table and supporting feet running through the upper table, a high-voltage terminal is arranged at the center of the upper surface of the upper table, and a U70BL type suspension insulator ball head is arranged at the lower surface of the upper table; a grounding terminal is arranged at the center of the lower surface of the lower table, and a U70BL type suspension insulator cap socket with a chain is arranged on the upper surface of the lower table, the U70BL type suspension insulator ball head is matched with the upper end of the U70BL type suspension insulator to be tested, and the U70BL type suspension insulator cap socket is matched with the lower end of the U70BL type suspension insulator to be tested.

[0010] Preferably, the upper table top and the lower table top are both made of conductive stainless steel.

[0011] Preferably, there are four legs in total, and the legs are cylindrical epoxy resin.

[0012] Preferably, the support legs are connected to the upper table top by bolts, the support legs are fixed to the lower table top by movable pins, and the position of the lower table top can be adjusted along the height direction.

[0013] Preferably, the high-voltage terminal and the grounding terminal are both made of conductive stainless steel and are respectively welded to the upper table and the lower table.

[0014] Preferably, 18 U70BL type suspension insulator ball heads are arranged on the lower surface of the upper table, the U70BL type suspension insulator ball heads are arranged in an array, and the U70BL type suspension insulator ball heads are welded to the upper table.

[0015] Preferably, the upper surface of the lower table is provided with 18 U70BL type suspension insulator cap sockets with chains, and the U70BL type suspension insulator cap sockets correspond to the U70BL type suspension insulator ball heads one by one; the U70BL type suspension insulator cap sockets are welded to the lower table.

[0016] Beneficial effects of the utility model:

[0017] 1. The maximum nominal diameter of the U70BL suspension insulator is 0.255m, and the nominal structural height is 0.146m. Therefore, the utility model can realize the AC withstand voltage test of multiple U70BL suspension insulators at one time, which is convenient and efficient.

[0018] 2. The upper and lower surfaces of the test platform are made of stainless steel, which has strong conductivity and high strength, and can meet the requirements of testing multiple insulators at the same time.

[0019] 3. The four legs of the test platform are made of epoxy resin, which has high strength and is not susceptible to moisture. While supporting the table top, it can ensure good insulation from the ground.

[0020] 4. The lower table of the test platform can be adjusted in height to facilitate the fixation of the insulator under test and prevent the insulator from swinging during the test.

[0021] 5. The four legs and the upper and lower tables of the test platform can be disassembled for easy transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the main structure of the U70BL type suspension insulator batch AC withstand voltage test platform

[0023] Figure 2 for Figure 1 Schematic diagram of the main structure.

[0024] Figure 3 This is a schematic diagram of the connection between the insulator under test and the test platform. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1 and 2 As shown, a U70BL type suspension insulator batch AC withstand voltage test platform comprises an upper table 1, a lower table 2 and a support leg 3 passing therethrough, wherein a high voltage terminal 4 is arranged at the center of the upper surface of the upper table 1, a 3×6 array of U70BL type suspension insulator ball heads 5 are arranged at the lower surface of the upper table 1, a grounding terminal 6 is arranged at the center of the lower surface of the lower table 2, and a 3×6 array of U70BL type suspension insulator cap sockets 7 with chains are arranged at the upper surface of the lower table 2, the U70BL type suspension insulator ball heads (5) are matched with the upper end of the U70BL type suspension insulator (10) to be tested, and the U70BL type suspension insulator cap sockets (7) are matched with the lower end of the U70BL type suspension insulator (10) to be tested.

[0027] Preferably, the upper table 1 is made of conductive stainless steel with dimensions of (2×1×0.005) m, and is used to fix the high-voltage terminal 4 and the U70BL type suspension insulator ball head 5, while also playing an electrically conductive and parallel role; the upper table 1 is connected to the support leg 2 by bolts 8.

[0028] Preferably, the lower table 2 is made of conductive stainless steel with dimensions of (2×1×0.01) m, and is used to fix the grounding terminal 6 and the U70BL type suspension insulator cap socket 7 with a chain, and at the same time plays an electrically conductive and parallel role; the lower table 2 is connected to the support leg 3 through a pin 9.

[0029] Preferably, there are four legs 2 in total, and the legs 2 are cylindrical epoxy resins with a height of 1.6 m, and are used to support the upper table 1 and the lower table 2 and maintain insulation from the ground.

[0030] Preferably, a high-voltage terminal 4 is provided at the center of the upper surface of the upper table 1, and a grounding terminal 6 is provided at the center of the lower surface of the lower table 2. The high-voltage terminal 4 and the grounding terminal 6 are both made of conductive stainless steel and are respectively welded to the upper table 1 and the lower table 2 for test wiring.

[0031] Preferably, 18 U70BL type suspension insulator ball heads 5 are provided on the lower surface of the upper table 1, and the U70BL type suspension insulator ball heads 5 are arranged in a 3×6 array, and the center distance between adjacent U70BL type suspension insulator ball heads 5 is 0.3m. The U70BL type suspension insulator ball heads 5 are welded to the upper table 1 and are used to suspend the upper end of the tested U70BL type suspension insulator 10.

[0032] Preferably, 18 U70BL type suspension insulator cap sockets 7 with chains are provided on the upper surface of the lower table 2, and the U70BL type suspension insulator cap sockets 7 are arranged in a 3×6 array, and the center distance between adjacent U70BL type suspension insulator cap sockets 7 is 0.3m. The U70BL type suspension insulator cap sockets 7 are welded to the lower table 2 and correspond one-to-one with the U70BL type suspension insulator ball heads 5, and are used to fix the lower end of the tested U70BL type suspension insulator 10.

[0033] The working principle of this embodiment is as follows:

[0034] When conducting the AC withstand voltage test of U70BL type suspension insulators, the upper ends of 18 tested U70BL type suspension insulators 10 are suspended on the ball head 5 at one time, and the height of the lower table is adjusted so that the lower ends of the tested U70BL type suspension insulators 10 are connected to the U70BL type suspension insulator cap sockets 7. The height of the lower table is adjusted until the chains are just straightened and tightened, the high-voltage generating end of the test device is connected to the high-voltage terminal 4, and the grounding end of the test device is connected to the grounding terminal 6. The test voltage is increased to 60kV as required, and the test results are observed and recorded; after the test is completed, the upper table and the lower table are discharged, the height of the lower table is adjusted, and the 18 tested U70BL type suspension insulators 10 are removed in turn, and the next batch of insulators are replaced for testing; after all the tests are completed, the bolts 8 and the pins 9 are loosened, and the support feet 3 are separated from the upper table 1 and the lower table 2 for transportation and storage.

[0035] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A U70BL type suspension insulator batch AC withstand voltage test platform, comprising an upper table (1), a lower table (2) and a support foot (3) passing therethrough, characterized in that: A high-voltage terminal (4) is arranged at the center of the upper surface of the upper table (1), and a U70BL type suspension insulator ball head (5) is arranged at the lower surface of the upper table (1); a grounding terminal (6) is arranged at the center of the lower surface of the lower table (2), and a U70BL type suspension insulator cap socket (7) with a chain is arranged at the upper surface of the lower table (2); the U70BL type suspension insulator ball head (5) is matched with the upper end of the U70BL type suspension insulator (10) under test, and the U70BL type suspension insulator cap socket (7) is matched with the lower end of the U70BL type suspension insulator (10) under test.

2. A U70BL type suspension insulator batch AC withstand voltage test platform according to claim 1, characterized in that: The upper table top (1) and the lower table top (2) are both made of conductive stainless steel.

3. A U70BL type suspension insulator batch AC withstand voltage test platform according to claim 1, characterized in that: There are four supporting legs (3) in total, and the supporting legs (3) are cylindrical epoxy resin.

4. A U70BL type suspension insulator batch AC withstand voltage test platform according to claim 1, characterized in that: The support foot (3) is connected to the upper table top (1) by means of bolts (8), the support foot (3) is fixed to the lower table top (2) by means of movable pins (9), and the position of the lower table top (2) can be adjusted in the height direction.

5. The U70BL type suspension insulator batch AC withstand voltage test platform according to claim 1, characterized in that: The high-voltage terminal (4) and the grounding terminal (6) are both made of conductive stainless steel and are respectively welded to the upper table (1) and the lower table (2).

6. The U70BL type suspension insulator batch AC withstand voltage test platform according to claim 1, characterized in that: The lower surface of the upper table (1) is provided with 18 U70BL type suspension insulator ball heads (5), the U70BL type suspension insulator ball heads (5) are arranged in an array, and the U70BL type suspension insulator ball heads (5) are welded to the upper table (1).

7. A U70BL type suspension insulator batch AC withstand voltage test platform according to claim 6, characterized in that: The upper surface of the lower table (2) is provided with 18 U70BL type suspension insulator cap sockets (7) with chains, and the U70BL type suspension insulator cap sockets (7) correspond to the U70BL type suspension insulator ball heads (5) one by one; the U70BL type suspension insulator cap sockets (7) are welded to the lower table (2).

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