CN114878917B - A transformer high voltage side DC resistance test auxiliary device - Google Patents

Abstract

A transformer high-voltage side direct current resistance test auxiliary device relates to a transformer high-voltage side resistance test device and aims to solve the problems that personal safety of an existing test method cannot be guaranteed and test efficiency is poor. The insulating sleeve is of a cylindrical structure with two open ends; the plurality of contact spring pieces are fixed on the inner wall of the insulating sleeve in a circumferential arrangement mode; the cross arm is fixed on the top end opening side of the insulating sleeve through a screw, and the bottom end opening side of the insulating sleeve is used for being inserted on a high-voltage side sleeve binding post; the horizontal plug-in component is fixed on the cross arm; one end of the wiring rod penetrates through the side wall of the insulating sleeve and is fixed on the contact spring piece, and the other end of the wiring rod is used for being connected with the resistance testing device; one end of the handheld insulating rod is connected to the outer side of the bottom of the U-shaped plug through a connecting piece; the U-shaped plug is matched with the horizontal plug-in unit. The beneficial effects are that under the prerequisite of guaranteeing personal safety, show improvement test efficiency and test precision and degree of accuracy.

Description

A transformer high voltage side DC resistance test auxiliary device

Technical Field

The invention relates to a transformer high-voltage side resistance testing device.

Background Art

At present, the existing DC resistance test on the high-voltage side of the main transformer of 110kV and above mainly relies on the test personnel to climb up the high-voltage side bushing of the main transformer to conduct test wiring, so as to conduct DC resistance test. This method has the following disadvantages: first, the existing test method requires the test personnel to climb the main transformer, which has the risk of falling from a height; second, the existing test method takes a long time to wire, which affects the test efficiency.

Summary of the invention

The purpose of the present invention is to solve the problems that the personal safety of personnel cannot be guaranteed and the testing efficiency is poor in the existing testing methods, and a transformer high-voltage side DC resistance testing auxiliary device is proposed.

The transformer high voltage side DC resistance test auxiliary device of the present invention comprises a spring wiring sleeve and a variable angle fork-type connecting insulating rod;

The spring wiring sleeve comprises an insulating sleeve, a contact spring sheet, a cross arm, a horizontal plug-in and a wiring rod;

The insulating sleeve is a cylindrical structure with openings at both ends; there are multiple contact spring sheets, and the multiple contact spring sheets are fixed on the inner wall of the insulating sleeve in a circumferential arrangement; the cross arm is fixed to the top opening side of the insulating sleeve by screws, and the bottom opening side of the insulating sleeve is used to be inserted into the high-voltage side bushing terminal; the horizontal plug-in is fixed to the cross arm; one end of the wiring rod passes through the side wall of the insulating sleeve and is fixed on the contact spring sheet, and the other end of the wiring rod is used to connect the resistance testing device;

The variable angle fork-type connecting insulating rod comprises a handheld insulating rod, a connecting piece and a U-shaped plug;

One end of the handheld insulating rod is connected to the outer side of the bottom of the U-shaped plug through a connecting piece; the U-shaped plug is used in conjunction with a horizontal plug-in.

The method for using the auxiliary device for testing the DC resistance on the high-voltage side of a transformer described in the present invention is as follows: the high-voltage test wiring is connected to a wiring rod, and an operator inserts a U-shaped plug into a horizontal plug-in by using a handheld insulating rod, and adjusts the connector to a suitable angle, and assembles the handheld insulating rod into a suitable length; then the spring wiring sleeve is inserted into the high-voltage side bushing terminal, ensuring that the contact spring sheet in the insulating sleeve is tightly fitted with the transformer bushing terminal and the current loop has good conductivity; then the U-shaped plug is pulled out from the horizontal plug-in above the insulating sleeve, and the other end of the test wiring fixed on the wiring rod is used to perform transformer testing. The above operations can realize transformer testing without climbing the bushing.

The beneficial effects of the present invention are as follows: in the past, the DC resistance test on the high-voltage side of the transformer mainly relied on the test personnel to climb the high-voltage side bushing of the main transformer and perform test wiring on the high-voltage side bushing terminal. However, with the development and application of the present invention, the test personnel do not need to climb the main transformer bushing, but hold the variable-angle fork-type connecting insulating rod on the ground, insert the spring wiring sleeve into the high-voltage side bushing terminal; and then the test wiring for the DC resistance test on the high-voltage side of the transformer can be performed; the device has a simple structure, is easy to carry, can be operated by one person, and has an adjustable angle; the application of the device ensures the personal safety of the test personnel, greatly saves the measurement time, significantly improves the test efficiency, and can also ensure the test precision and accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a transformer high-voltage side DC resistance test auxiliary device according to a specific implementation mode 1;

FIG2 is a schematic diagram of an exploded structure of a transformer high-voltage side DC resistance test auxiliary device according to a specific implementation mode 1;

FIG. 3 is a schematic diagram of the structure of a horizontal plug-in in a third specific implementation manner.

DETAILED DESCRIPTION

Specific implementation method 1: This implementation method is described in conjunction with Figures 1 and 2. This implementation method describes an auxiliary device for testing the DC resistance of a transformer at a high voltage side. The auxiliary device includes a spring wiring sleeve and a variable angle fork-type connecting insulating rod;

The spring wiring sleeve comprises an insulating sleeve 1, a contact spring sheet 2, a cross arm 3, a horizontal plug-in 4 and a wiring rod 6;

The insulating sleeve 1 is a cylindrical structure with openings at both ends; there are multiple contact spring sheets 2, and the multiple contact spring sheets 2 are fixed on the inner wall of the insulating sleeve 1 in a circumferential arrangement; the cross arm 3 is fixed to the top opening side of the insulating sleeve 1 by screws, and the bottom opening side of the insulating sleeve 1 is used to be inserted into the bushing terminal on the high-voltage side of the transformer; the horizontal plug-in 4 is fixed on the cross arm 3; one end of the wiring rod 6 passes through the side wall of the insulating sleeve 1 and is fixed on the contact spring sheet 2, and the other end of the wiring rod 6 is used to connect the resistance testing device;

The variable angle fork-type connecting insulating rod comprises a handheld insulating rod 7, a connecting piece 8 and a U-shaped plug 9;

One end of the handheld insulating rod 7 is connected to the outside of the bottom of the U-shaped plug 9 through a connecting piece 8; the U-shaped plug 9 is used in conjunction with the horizontal plug 4.

Specific implementation method 2: This implementation method further defines the auxiliary device for testing the DC resistance of the transformer high voltage side described in the specific implementation method 1. In this implementation method, the auxiliary device further includes a spring screw 5;

The spring screw 5 fixes the contact spring piece 2 on the inner wall of the insulating sleeve 1 .

In this embodiment, the spring screw 5 can increase the elasticity of the contact spring piece 2, so that the spring terminal sleeve can be suitable for terminals to be tested on the high-voltage side of the transformer with different diameters.

Specific implementation method three: This implementation method is described in conjunction with Figure 3. This implementation method further defines the auxiliary device for testing the high-voltage side DC resistance of a transformer described in the specific implementation method one. In this implementation method, the horizontal plug-in 4 includes two plug-ins 4-1 and a horizontal fixing plate 4-2;

The two inserts 4-1 have the same structure, both comprising a cylindrical body 4-1-1, a trumpet-shaped socket 4-1-2 arranged at the front end of the cylindrical body, and a damping cylinder 4-1-3 arranged at the rear end of the cylindrical body; at the same time, the two inserts 4-1 are respectively arranged at both ends of the horizontal fixing plate 4-2, and the two trumpet-shaped sockets 4-1-2 face the same direction;

A mounting hole 4 - 3 is provided at the center of the horizontal fixing plate 4 - 2 , and the mounting hole 4 - 3 is used for fixed connection with the cross arm 3 .

In this embodiment, the horizontal fixing plate 4-2 is provided to facilitate installation and fixation; the trumpet-shaped socket 4-1-2 is provided to facilitate the operator to insert the U-shaped plug 9 into the cylindrical body 4-1-1; the damping cylinder 4-1-3 is provided to increase the friction between the U-shaped plug 9 and the horizontal fixing plate 4-2 to prevent the spring wiring sleeve from accidentally falling off during operation.

Specific implementation mode 4: This implementation mode further limits the auxiliary device for testing the DC resistance on the high-voltage side of the transformer described in specific implementation mode 1. In this implementation mode, the rotatable angle of the connector 8 is 270 degrees.

In this embodiment, the function of the connecting piece 8 is to keep the handheld insulating rod 7 and the U-shaped plug 9 at a certain angle, so that the operator can easily insert the U-shaped plug 9 into the horizontal plug 4, and then easily insert the insulating sleeve 1 into the terminal to be tested on the high-voltage side of the transformer.

Specific implementation mode 5: This implementation mode further limits the auxiliary device for testing the DC resistance at the high voltage side of the transformer described in specific implementation mode 1. In this implementation mode, the number of the contact spring pieces 2 is four.

In this embodiment, four contact spring pieces 2 can ensure that contact spring pieces 2 are provided around the insulating sleeve 1, thereby avoiding poor contact between the contact spring pieces 2 and the terminal to be tested on the high-voltage side of the transformer.

Specific implementation method six: This implementation method further limits the auxiliary device for testing the DC resistance on the high-voltage side of the transformer described in specific implementation method one. In this implementation method, the insulating sleeve 1 is made of polytetrafluoroethylene.

In this embodiment, the polytetrafluoroethylene has good insulation performance and is safer during operation.

Specific implementation method 7: This implementation method further limits the auxiliary device for testing the DC resistance on the high-voltage side of a transformer described in specific implementation method 1. In this implementation method, the contact spring piece 2 is a copper contact spring piece.

In this embodiment, the copper connecting rod has good conductivity and does not affect the resistance test result.

Specific implementation eight: This implementation further limits the auxiliary device for testing the DC resistance on the high-voltage side of a transformer described in specific implementation one. In this implementation, the connection rod 6 is a copper connection rod.

In this embodiment, the copper connecting rod has good conductivity and does not affect the resistance test result.

Specific implementation method 9: This implementation method further limits the transformer high-voltage side DC resistance test auxiliary device described in specific implementation method 1. In this implementation method, the handheld insulating rod 7 is a multi-section type, and two adjacent sections of the handheld insulating rod 7 are connected by threads.

In this embodiment, the number of sections of the handheld insulating rod 7 and the length of the handheld insulating rod 7 are selected according to the height of the transformer.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A transformer high-voltage side DC resistance test auxiliary device, characterized in that the auxiliary device comprises a spring wiring sleeve and a variable-angle fork-type connecting insulating rod; The spring wiring sleeve comprises an insulating sleeve (1), a contact spring sheet (2), a cross arm (3), a horizontal plug-in unit (4) and a wiring rod (6); The insulating sleeve (1) is a cylindrical structure with two ends open; there are a plurality of contact spring sheets (2), and the plurality of contact spring sheets (2) are fixed on the inner wall of the insulating sleeve (1) in a circumferential arrangement; a cross arm (3) is fixed to the top opening side of the insulating sleeve (1) by means of screws, and the bottom opening side of the insulating sleeve (1) is used to be inserted into the high-voltage side bushing terminal; a horizontal plug-in (4) is fixed to the cross arm (3); one end of a wiring rod (6) passes through the side wall of the insulating sleeve (1) and is fixed to the contact spring sheet (2), and the other end of the wiring rod (6) is used to connect a resistance testing device; The variable-angle fork-shaped connecting insulating rod comprises a handheld insulating rod (7), a connecting piece (8) and a U-shaped plug (9); One end of the handheld insulating rod (7) is connected to the outside of the bottom of the U-shaped plug (9) through a connecting piece (8); the U-shaped plug (9) is used in conjunction with the horizontal plug-in unit (4). 2. A transformer high voltage side DC resistance test auxiliary device according to claim 1, characterized in that the auxiliary device further comprises a spring screw (5); The spring screw (5) fixes the contact spring sheet (2) on the inner wall of the insulating sleeve (1). 3. A transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the horizontal plug-in (4) comprises two plug-in sleeves (4-1) and a horizontal fixing plate (4-2); The two insert cylinders (4-1) have the same structure, and both include a cylindrical body (4-1-1), a trumpet-shaped socket (4-1-2) arranged at the front end of the cylindrical body, and a damping cylinder (4-1-3) arranged at the rear end of the cylindrical body; the two insert cylinders (4-1) are respectively arranged at the two ends of the horizontal fixing plate (4-2), and the two trumpet-shaped sockets (4-1-2) face the same direction; A mounting hole (4-3) is provided at the center of the horizontal fixing plate (4-2), and the mounting hole (4-3) is used for fixed connection with the cross arm (3). 4. A transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the rotatable angle of the connecting piece (8) is 270 degrees. 5. The transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the number of the contact spring pieces (2) is four. 6. The transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the insulating sleeve (1) is made of polytetrafluoroethylene. 7. A transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the contact spring piece (2) is a copper contact spring piece. 8. The transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the connecting rod (6) is a copper connecting rod. 9. A transformer high-voltage side DC resistance test auxiliary device according to claim 1, characterized in that the handheld insulating rod (7) is a multi-section type, and two adjacent sections of the handheld insulating rod (7) are connected by threads.