CN213957426U - Sleeve voltage-sharing cap for partial discharge test of transformer - Google Patents

Abstract

The utility model discloses a transformer is sleeve pipe pressure equalizing cap for partial discharge test, including wearing the pressure equalizing cap on the conducting rod, the pressure equalizing cap specifically is hollow structure, and is provided with the orientation in the port on top the inside fixing base shell of pressure equalizing cap, the conducting rod entry has been seted up on the fixing base shell, the inner wall of conducting rod entry is equipped with the soft copper sheet of elasticity that is circumference array distribution, the top of pressure equalizing cap is equipped with hoist and mount mouth. The utility model discloses a transformer partial discharge is sleeve pipe voltage-sharing cap for experiment, because the inside of this fixing base shell is provided with the soft copper sheet of elasticity of chamfer, this kind of design makes testing personnel in the installation, in the equalizer ring can insert the conducting rod entrance, it is inseparabler to make voltage-sharing cap and conducting rod be connected, reduces the possibility of virtual joint, guarantees the problem that can not take place to drop at the in-process that detects, guarantees the voltage-sharing effect among the circular telegram testing process to the authenticity and the reliability of experimental data have been guaranteed.

Description

Sleeve voltage-sharing cap for partial discharge test of transformer

Technical Field

The utility model relates to a test apparatus, especially a transformer is sleeve pipe pressure equalizing cap for partial discharge test for electrical primary professional equipment.

Background

In the preparation work of the partial discharge test of the transformer in the test field, a voltage equalizing cap is arranged on a high-voltage side sleeve (the high voltage generated at the top of the sleeve in the test can cause an uneven electric field and can interfere with the test). After the scaffold needs to be set up in advance, a tester puts on the uniform pressure cap and fixes the uniform pressure cap on the wiring row at the top of the sleeve, and usually, a bare copper wire tightly connected with the uniform pressure cap is wound on the uniform pressure cap, or the wiring row at the top of the sleeve is detached to expose a conducting rod, and the bare copper wire is wound on the conducting rod.

However, the loose connection between the sleeve and the grading cap is easy to occur due to the winding method of the bare copper wire, and if the test data is disturbed, the scaffold needs to be set up again for fixing, so that the field work is very inconvenient, time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

In view of the above problems existing in the prior art, an aspect of the present invention is to provide a sleeve equalizing cap for a transformer partial discharge test, which is used to make a conductive rod connect more closely and reduce the possibility of virtual connection.

Technical scheme

In order to realize the above-mentioned purpose, the utility model provides a pair of transformer is sleeve pipe pressure equalizing cap for partial discharge test, including wearing the pressure equalizing cap on the conducting rod, the pressure equalizing cap specifically is hollow structure, and is provided with the orientation in the port on top the inside fixing base shell of pressure equalizing cap, the conducting rod entry has been seted up on the fixing base shell, the inner wall of conducting rod entry is equipped with the soft copper sheet of elasticity that is circumference array distribution, the top of pressure equalizing cap is equipped with the hoist and mount mouth.

Preferably, the voltage equalizing cap is made of conductive metal and is electrically connected with the flexible copper sheet.

Preferably, the elastic soft copper sheet is formed by bending a copper sheet into an inverted & lt type, and the inclined plane faces to the center of the inlet of the conductive rod.

Preferably, the bottom of the pressure equalizing cap is of an arc structure, and the top of the arc is provided with a sleeve inlet which is coaxially distributed with the conductive rod inlet.

Preferably, still include handheld pole, handheld pole's top is equipped with the clamping part, the clamping part is used for the centre gripping by the assembly the cap is all pressed, the clamping part include connecting portion and symmetry set up in the supporting rod of connecting portion one side, the supporting rod is located the inside one end of connecting portion is equipped with the worm wheel, the inside axial of connecting portion is rotated and is connected with the worm, two the worm wheel with the worm meshes mutually, the worm is assembled and is used for ordering about these two supporting rods and folds to the center.

Preferably, the connecting portion is provided with a torsion spring, and the torsion springs are mounted at the left end and the right end of the worm.

Preferably, the clamping ring is arranged on the outer wall of the pressure equalizing cap, and a rubber pad is arranged on the outer wall of one side, in contact with the clamping ring, of the clamping rod.

Advantageous effects

Compared with the prior art, the utility model provides a pair of transformer is sleeve pipe pressure equalizing cap for partial discharge test possesses following beneficial effect:

1. the utility model discloses install the fixing base shell directly over in the middle of the top in the voltage-sharing cap additional to be provided with the soft copper sheet of elasticity of chamfer in the inside of fixing base shell, this kind of design makes testing personnel in the installation, the equalizer ring can insert in the conducting rod entrance, and make the soft copper sheet of elasticity remove to being close to conducting rod entry inner wall one side, the extrusion makes the equalizer ring fix, it is also very convenient when this same design makes to take, effectively reduce the risk that personnel ascended the operation like this.

2. The utility model discloses a mode of elasticity soft copper sheet low pressure also can make the equipressure cap be connected more closely with the conducting rod, reduces the possibility of virtual joint, guarantees can not take place the problem that drops at the in-process that detects, guarantees voltage-sharing effect among the circular telegram testing process to the authenticity and the reliability of experimental data have been guaranteed.

3. The utility model discloses utilize handheld pole and clamping part, adopt manual mode to carry out the centre gripping to the voltage-sharing cap to utilize handheld pole to cup joint the conducting rod with this voltage-sharing cap on, made things convenient for the experiment operation, and the centre gripping drive of this supporting rod utilizes the cooperation for worm wheel and worm, utilizes its mechanical characteristic, enlargies the effort of torsional spring, the stability of guarantee centre gripping.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the pressure equalizing cap of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure of the equalizing cap of the present invention;

FIG. 4 is a schematic view of the structure of the clamping portion of the present invention;

fig. 5 is a schematic view of the sectional structure of the clamping portion of the present invention.

The main reference numbers:

1. a pressure equalizing cap; 11. a clamping ring; 2. a fixed seat shell; 3. a conductive rod inlet; 4. a flexible copper sheet; 5. a hand-held wand; 6. a clamping portion; 61. a connecting portion; 62. a clamping rod; 621. a rubber pad; 63. a worm gear; 64. a worm; 7. a cannula inlet; 8. and (5) hoisting the opening.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

Referring to fig. 1-5, a sleeve pressure equalizing cap for a transformer partial discharge test includes a pressure equalizing cap 1 worn on a conductive rod, the pressure equalizing cap 1 is specifically of a hollow structure, a fixing seat shell 2 facing the inside of the pressure equalizing cap 1 is arranged in a port at the top end of the pressure equalizing cap, a conductive rod inlet 3 is formed in the fixing seat shell 2, elastic soft copper sheets 4 distributed in a circumferential array are arranged on the inner wall of the conductive rod inlet 3, and a hoisting port 8 is formed at the top of the pressure equalizing cap 1. At specific implementation in-process, install fixing base shell 2 directly over in the middle of the top in voltage-sharing cap 1, and be provided with the soft copper sheet of elasticity 4 of chamfer in fixing base shell 2's inside, 3 top sealings in conducting rod entry, this kind of design makes the testing personnel in the installation, the equalizer ring can insert in the conducting rod entry 3, and make the soft copper sheet of elasticity 4 remove to being close to 3 inner wall one sides in conducting rod entry, the extrusion makes the conducting rod fix, it is also very convenient when same this design makes the picking, effectively reduce the risk that personnel ascended the operation like this.

In a specific embodiment, the voltage-sharing cap 1 is made of conductive metal, and the voltage-sharing cap 1 is electrically connected with the elastic soft copper sheet 4. Consequently when testing, the electric current passes through the soft copper sheet 4 of equipressure cap 1 and elasticity for on the even flow direction conducting rod of electric current, reach the purpose of electric current voltage-sharing, also can make the equipressure cap 1 be connected inseparabler with the conducting rod, reduce the possibility of virtual connecing, guarantee can not take place the problem that drops at the in-process that detects, and guaranteed the authenticity and the reliability of experimental data.

With further reference to fig. 3, it can be seen that in some embodiments, the flexible copper sheet 4 is made of a copper sheet bent to an inverted angle type, and the inclined surface faces to the center of the conductive rod inlet 3. When the conducting rod is inserted, the elastic soft copper sheet 4 is extruded and deformed along the inclined surface of the elastic soft copper sheet 4.

As shown in fig. 3, the utility model discloses in the further technical scheme that provides, the bottom of voltage-sharing cap 1 is the arc structure, and the top of arc type is seted up and is the sleeve pipe entry 7 that distributes with the axle center with conducting rod entry 3.

As shown in fig. 4 and 5, the utility model discloses in the further technical scheme that proposes, clamping part 6 includes connecting portion 61 and symmetry sets up in the clamping rod 62 of connecting portion 61 one side, and the clamping rod 62 is located the inside one end of connecting portion 61 and is equipped with worm wheel 63, and the inside axial of connecting portion 61 is rotated and is connected with worm 64, and two worm wheels 63 mesh with worm 64 mutually, and worm 64 is assembled and is used for driving about these two clamping rods 62 and folds to the center.

In a specific implementation, since the connecting portion 61 is provided with torsion springs, the torsion springs are mounted at the left and right ends of the worm 64. Therefore, the clamping rod 62 is driven to fold towards the center under the action of the torsion spring, the experiment operation is facilitated, the clamping driving of the clamping rod 62 is the matching of the worm wheel 63 and the worm 64, the acting force of the torsion spring is amplified by utilizing the mechanical characteristics of the clamping rod, and the clamping stability is guaranteed.

As further shown in fig. 5, it can be seen that, in some embodiments, the outer wall of the pressure equalizing cap 1 is provided with a clamping ring 11, and the outer wall of the side of the clamping rod 62 contacting with the clamping ring 11 is provided with a rubber pad 621. The friction force between the clamping rod 62 and the pressure equalizing cap 1 is increased. The edge opening of the clamping ring 11 is circular arc-shaped.

The working principle is as follows:

after power failure, the voltage-sharing cap 1 is held or the voltage-sharing cap 1 is lifted through the lifting opening 8 for installation, or

The pressure equalizing cap 1 is placed on the inner sides of the two clamping rods 62, then the clamping rods 62 are loosened to be folded towards the center under the action force of the worm 64 and the torsion spring, and the clamping rods are clamped in the clamping ring 11. Then, a user sleeves the uniform pressure cap 1 on the conducting rod through the handheld rod 5, and when the conducting rod is inserted, the elastic soft copper sheet 4 is extruded and deformed along the inclined plane of the elastic soft copper sheet 4 to be fixed. Then the user pulls the hand-held rod 5, the two clamping rods 62 can be separated from the clamping ring 11 along the lower bottom edge of the clamping ring 11 under the pulling-down action force, and then the outer wall of the pressure equalizing cap 1 is completely separated by utilizing the smooth outer wall of the pressure equalizing cap 1 after pulling backwards.

After the installation is completed, high-voltage current is switched on, and the high-voltage current can uniformly flow to the conducting rod of the transformer through the voltage-equalizing cap 1 and the elastic soft copper sheet, so that the current connected to the conducting rod is always kept in a voltage-equalizing state in the whole experimental process.

The above embodiments are merely exemplary embodiments of the present invention, which is not intended to limit the present invention, and the scope of the present invention is defined by the appended claims. Various modifications and equivalents may be made by those skilled in the art to the present invention without departing from the spirit and scope of the invention, and such modifications and equivalents should be considered to be within the scope of the invention.

Claims (7)

1. The utility model provides a transformer partial discharge is sleeve pipe voltage-sharing cap for experiment which characterized in that: including wearing cap (1) of all pressing on the conducting rod, cap (1) of all pressing specifically is hollow structure, and is provided with the orientation in the port on top cap (1) inside fixing base shell (2) of all pressing, conducting rod entry (3) have been seted up on fixing base shell (2), the inner wall of conducting rod entry (3) is equipped with the soft copper sheet of elasticity (4) that are circumference array distribution, the top of cap (1) of all pressing is equipped with hoist and mount mouth (8).

2. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 1, wherein: the uniform pressure cap (1) is made of conductive metal, and the uniform pressure cap (1) is electrically connected with the elastic soft copper sheet (4).

3. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 1, wherein: the elastic soft copper sheet (4) is formed by bending a copper sheet into an inverted angle type, and the inclined plane faces to the center of the conductive rod inlet (3).

4. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 1, wherein: the bottom of the pressure equalizing cap (1) is of an arc structure, and the top of the arc structure is provided with a sleeve inlet (7) which is coaxially distributed with the conducting rod inlet (3).

5. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 1, wherein: still include handheld pole (5), the top of handheld pole (5) is equipped with clamping part (6), clamping part (6) are assembled and are used for the centre gripping cap (1) is all pressed, clamping part (6) including connecting portion (61) and symmetry set up in clamping rod (62) of connecting portion (61) one side, clamping rod (62) are located the inside one end of connecting portion (61) is equipped with worm wheel (63), the inside axial of connecting portion (61) is rotated and is connected with worm (64), two worm wheel (63) with worm (64) mesh mutually, worm (64) are assembled and are used for driving these two clamping rod (62) to the center and fold.

6. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 5, wherein: the connecting portion (61) is provided with a torsion spring, and the torsion springs are mounted at the left end and the right end of the worm (64).

7. The bushing voltage-sharing cap for the partial discharge test of the transformer according to claim 1, wherein: clamping ring (11) has been seted up to the outer wall of pressure equalizing cap (1), and supporting rod (62) with the outer wall of the one side that clamping ring (11) contacted is equipped with rubber pad (621).

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