CN218272393U - Special tool for terminal screen wire clamp for transformer high-voltage bushing test - Google Patents

Abstract

The utility model discloses an experimental end screen fastener specialized tool of transformer high-tension bushing, include: the clamping device comprises a clamping body, an inserting component and an adapter, wherein the inserting component is arranged at an upper jaw part of the clamping body; the adaptor is inserted into the insertion component, one end of the adaptor is inserted into the insertion component, and the other end of the adaptor is used for being inserted into the end screen electrode; this fastener is provided with two kinds of connected modes, can select suitable connected mode according to on-the-spot actual work condition and test line direction of arrangement, uses in a flexible way, conveniently, can effectively avoid the wiring to become flexible suddenly and lead to the coarse condition of test result to appear, guarantees the accuracy of test result.

Description

Special tool for terminal screen wire clamp for transformer high-voltage bushing test

Technical Field

The utility model relates to a high-tension bushing mesoscopic decreases test tool technical field, concretely relates to experimental end screen fastener specialized tool of transformer high-tension bushing.

Background

The medium loss test of the high-voltage bushing of the main transformer needs to be regularly carried out every year in the hydropower station, according to the method and the requirement for measuring the dielectric loss test of the high-voltage bushing with the end screen, a test wire needs to be connected into the end screen electrode of the bushing in the test, the end screen grounding spring piece in the interface is weak because the end screen electrode interface is designed to be small, and in addition, the on-site actual working condition and the test wire arrangement direction of each test can have differences, so that the general standard wire clamp and a tool are very difficult to plug in the end screen electrode, and the following problems mainly exist:

(1) Due to the problem of the wiring angle, the tooth-shaped clamping nozzle cannot completely go deep into the end screen interface and is not firmly contacted with the cylindrical end screen electrode, and the conditions of sudden line breakage or poor contact and the like exist in the test process, so that the test accuracy is reduced, and the test data is unreliable.

(2) The test wiring process is slow, and the wiring angle needs to be adjusted for multiple times to finish the connection of a test wire to the sleeve end screen electrode, so that the working efficiency of a tester is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the inventor provides a special tool for a terminal screen wire clamp in a transformer high-voltage bushing test, a proper connection mode can be selected according to actual conditions, and the accuracy of a test result is guaranteed.

Specifically, the utility model discloses a realize like this:

the utility model provides an experimental end screen fastener specialized tool of transformer high-tension bushing, includes:

a clamping body;

the inserting assembly is arranged at the upper jaw part of the clamping body;

and one end of the adaptor is inserted with the end screen electrode.

Further, the adaptor includes:

the first conductor section is used for being clamped by the clamping body or being plugged with the plugging component;

and the second conductor section is connected with the first conductor section, the diameter of the second conductor section is smaller than that of the end screen interface, one end, close to the end screen electrode, of the second conductor section is provided with a jack, and a clamping piece used for clamping the end screen electrode is arranged in the jack.

Further, the clamping member includes: two spring leaves that the symmetry set up, two spring leaves enclose to close and form and press from both sides the mouth.

Further, the spring piece is arc-shaped.

Furthermore, an insulating soft rubber sleeve is arranged on the second conductor section.

Furthermore, one end of the second conductor segment, which is close to the end screen electrode, is provided with a jack lead angle.

The utility model discloses a theory of operation:

when the tool is used, the clamping body or the plug-in component is selected to be used according to the actual working condition on site and the arrangement direction of the test wires. When the connection is carried out by using the plugging mode, the adaptor is inserted into the end screen interface firstly, and then the adaptor is inserted into the plugging assembly, so that the connection with the end screen electrode is realized.

Under the condition that some plugging modes are inconvenient to operate, the clamping bodies are adopted for connection. The method comprises the following specific steps: the adaptor is inserted into the end screen interface to enable the end screen electrode to be inserted into the adaptor, and then the adaptor is clamped by the clamping body to achieve connection with the end screen electrode.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model provides an experimental end screen fastener specialized tool of transformer high-tension bushing is provided with two kinds of connected modes, can select suitable connected mode according to on-the-spot actual work condition and test line arrangement direction, uses in a flexible way, convenient.

(2) The end screen grounding elastic sheet is connected with the end screen electrode in a mode of the adapter piece, the end screen interface of the sleeve cannot be damaged, the end screen grounding elastic sheet cannot be broken or fall off due to frequent insertion or brute force clamping, the test wire and the end screen electrode can be guaranteed to be in fully-enclosed reliable connection, and the situation that the test result is inaccurate due to sudden loosening of the connection wire is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a special tool for testing a terminal screen clamp of a high-voltage bushing of a transformer in embodiment 1;

FIG. 2 is a front view of a special tool for testing a terminal clamp of a transformer high-voltage bushing in example 1;

fig. 3 is a sectional view of the adaptor in embodiment 1;

FIG. 4 is a schematic diagram of a conventional high voltage bushing;

fig. 5 is a first state diagram of the use of the special tool for testing the terminal clamp of the transformer high-voltage bushing in example 1;

fig. 6 is a second state of use diagram of the transformer high voltage bushing test terminal clamp application specific tool of example 1.

Reference numerals:

1-clamping the body; 11-upper jaw; 12-lower jaw; 2-a plug-in assembly; 3-an adapter; 31-a first conductor segment; 32-a second conductor segment; 321-a jack; 322-jack lead angle; 4-a spring leaf; 5-end screen interface; 51-end screen electrode.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1-6, the utility model provides an experimental end screen fastener specialized tool of transformer high-tension bushing, include: the clamping device comprises a clamping body 1, a plug-in component 2 and an adaptor 3, wherein the clamping body 1 is a conventional wire clamp and mainly comprises an upper jaw part 11, a lower jaw part 12 and supporting legs. The plug-in component 2 is arranged on the upper jaw part 11, and a plug-in hole is arranged at one end of the plug-in component close to the end screen interface 5. The other end of the adaptor 3 is plugged with the end screen electrode 51. This fastener can select to use centre gripping body 1 or plug assembly 2 according to actual conditions when using, uses more nimble, the convenience of using, can effectively avoid becoming flexible and lead to the inaccurate condition of test result.

Specifically, as shown in fig. 3, the adaptor 3 includes: a first conductor segment 31 and a second conductor segment 32, the first conductor segment 31 being held by the lower jaw 12 of the upper jaw 11 of the holding body 1 or being inserted into the plug hole of the plug assembly 2 in use. The second conductor segment 32 is externally wrapped with an insulating soft rubber sleeve (not shown), so that the sleeve end screen can be prevented from being damaged while the insulating function is achieved. The sleeve end screen interface is prevented from being damaged, and the end screen grounding elastic sheet cannot be broken or fall off. The second conductor segment 32 has a smaller diameter than the end screen interface 5, so that it projects into the end screen interface 5. One end, close to the end screen electrode 51, of the second conductor segment is provided with a jack 321, a clamping piece used for clamping the end screen electrode 51 is arranged in the jack 321, and after the end screen electrode 51 is inserted into the jack 321, the end screen electrode 51 is clamped by the clamping piece, so that the test wire and the end screen electrode 51 are reliably connected in a fully-surrounded mode, and the accuracy of a test result is guaranteed.

Further, the clamping member includes: two spring pieces 4 that the symmetry set up, spring piece 4 are the arc form, and two spring pieces 4 enclose to close and form and press from both sides the mouth, and after end screen electrode 51 inserted jack 321, extrude two spring pieces 4 gradually, finally enter into in pressing from both sides the mouth, under the effect of spring piece 4 resilience force, clip end screen electrode 51, form the full wrapped up form and expand tightly, increased the area of contact of end screen electrode 51 and fastener, help improving the mesoscopic damage test result accuracy.

Further, an end of the second conductor segment 32 near the end screen electrode 51 is provided with a socket lead angle 322 to facilitate the insertion of the second conductor segment 32 into the end screen interface 5.

Specifically, when the test wire clamp is used, the clamping body 1 or the plug-in assembly 2 is selected to be used according to the actual working condition of the site and the arrangement direction of the test wire, so that the connection stress is small, and the test wire clamp and the end screen electrode 51 are prevented from falling off due to wind power, vibration and test wire tension in the test process.

When the adaptor 3 is used for connection, the adaptor 3 is inserted into the end screen interface 5, the two spring pieces 4 are used for clamping the end screen electrode 51, and then the adaptor 3 is inserted into the plug hole in the plug assembly.

In the case that some of the plug assemblies 2 are inconvenient to operate, when the clamping body 1 is used for connection, similarly, the second conductor segment 32 is inserted into the end shield interface 5, the two leaf springs 4 are used for clamping the end shield electrode 51, and then the clamping body 1 is used for clamping the first conductor segment 31, so that connection is realized.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (5)

1. The utility model provides an experimental end screen fastener specialized tool of transformer high-tension bushing, includes centre gripping body (1), its characterized in that still includes:

the plug-in assembly (2) is arranged on the upper jaw part (11) of the clamping body (1);

an adaptor (3) with one end plugged with the end screen electrode (51);

the adaptor (3) comprises:

a first conductor segment (31) for being clamped by the clamping body or plugged with the plug assembly;

the second conductor section (32) is connected with the first conductor section (31), the diameter of the second conductor section is smaller than that of the end screen interface (5), one end, close to the end screen electrode (51), of the second conductor section (32) is provided with a jack (321), and a clamping piece used for clamping the end screen electrode (51) is arranged in the jack (321).

2. The special tool for the transformer high-voltage bushing test end screen clamp of claim 1, wherein the clamping piece comprises: two spring pieces (4) that the symmetry set up, two spring pieces (4) enclose and close and form and press from both sides the mouth.

3. The special tool for testing the end screen clamp of the transformer high-voltage bushing as claimed in claim 2, wherein the spring plate (4) is arc-shaped.

4. The special tool for a transformer high-voltage bushing test end screen clamp as claimed in claim 1, wherein the second conductor section (32) is provided with a soft insulating rubber sleeve.

5. The tool for testing end screen clamps for transformer high-voltage bushings according to any of claims 1-4, characterized in that the end of the second conductor segment (32) close to the end screen electrode (51) is provided with a socket lead angle (322).

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