CN216310126U

CN216310126U - Special clamping component for measuring insulation resistance and absorption ratio of stator winding

Info

Publication number: CN216310126U
Application number: CN202120748993.6U
Authority: CN
Inventors: 刘国建; 饶蕾; 李智胜
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-04-15
Anticipated expiration: 2031-04-13

Abstract

A special clamping component for measuring insulation resistance and absorption ratio of a stator winding comprises two clamping arms, wherein the two clamping arms are hinged, and the clamping arms are divided into arm rod sections and handle rod sections by hinge points; the front section of the arm rod section is bent downwards, and the end part of the front section of the arm rod section is connected with a chuck; be equipped with insulating cover on the handle pole section, connect through the elastic component between two handle pole sections, the tip detachably of one of them handle pole section is connected with test wire connector, and test wire connector is used for being connected with test wire detachably. The clamping arm with a longer size is designed, the front end of the clamping arm is bent, operation in a narrow and small wiring space is facilitated, matching performance is good, installation and use are convenient, and working efficiency is improved.

Description

Special clamping component for measuring insulation resistance and absorption ratio of stator winding

Technical Field

The utility model belongs to the field of stator winding insulation resistance and absorption ratio measuring equipment, and particularly relates to a special clamping component for measuring the insulation resistance and the absorption ratio of a stator winding.

Background

In the insulation test work of the generator, measuring the insulation resistance and the absorption ratio of the stator winding is the most common method for detecting the insulation state, and according to the specification in DL/T751-2019 hydro-generator operating regulations: before the generator is started, the insulation of a generator stator excitation loop is measured and recorded. Therefore, generator stator insulation is an important indicator for determining whether a generator can be put into operation. For example, in the "three gorges power plant generator and auxiliary equipment operating regulations": the unit is reserved for 15 days, and the insulation resistance of the stator and the rotor of the generator is preferably measured; before the unit is overhauled and quit standby, and when the unit is overhauled and recovered to standby, the insulation resistance of the stator and the rotor of the generator is measured.

Because the exposed position of the lower end of the stator bar wire is in the insulating diversion box, the wiring space is narrow, the existing test wire clamp is small, manual wiring is laborious, and when the test wire clamp is hung by a fuse, the contact area is small, and poor contact is easy to occur.

Disclosure of Invention

In view of the technical problems in the background art, the special clamping component for measuring the insulation resistance and the absorption ratio of the stator winding provided by the utility model is provided with the clamping arm with a longer size, the front end of the clamping arm is bent, the operation at a narrow wiring space position is facilitated, the matching performance is good, the installation and the use are convenient, and the working efficiency is improved.

In order to solve the technical problems, the utility model adopts the following technical scheme to realize:

a special clamping component for measuring insulation resistance and absorption ratio of a stator winding comprises two clamping arms, wherein the two clamping arms are hinged, and the clamping arms are divided into arm rod sections and handle rod sections by hinge points; the front section of the arm rod section is bent downwards, and the end part of the front section of the arm rod section is connected with a chuck; be equipped with insulating cover on the handle pole section, connect through the elastic component between two handle pole sections, the tip detachably of one of them handle pole section is connected with test wire connector, and test wire connector is used for being connected with test wire detachably.

In a preferred scheme, the test wire connector comprises an internal thread insulating sleeve, a conducting strip is rotatably arranged in the internal thread insulating sleeve and is used for being connected with a test wire; the internal thread insulating sleeve is in threaded connection with the conductive column, and the conductive column is connected with the handle rod section.

In the preferred scheme, the conducting strip is provided with a lug, and the lug is used for being connected with a wire core of the test wire.

In the preferred scheme, the end part of the other handle rod section is provided with a jack, an elastic sheet is arranged in the jack, and a measuring pen point is inserted in the jack.

In the preferred scheme, the chuck is a square metal block, and the square metal block is provided with a convex tooth clamping surface; the arm rod section is provided with an insulating layer.

This patent can reach following beneficial effect:

because the exposed position of the lower end of the stator bar wire is in the insulating diversion box, the wiring space is narrow, the existing test wire clamp is small, manual wiring is laborious, and when the test wire clamp is hung by a fuse, the contact area is small, and poor contact is easy to occur. The component is manufactured according to the size of field equipment, a clamping arm with a longer size is designed, the front end of the clamping arm is bent, the structure is similar to that of tweezers and fire tongs, the matching performance is good, and the installation and the use are convenient; because this component wiring is convenient, easy operation has saved test time greatly.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a first three-dimensional block diagram of the present invention;

FIG. 2 is a second three-dimensional block diagram of the present invention;

FIG. 3 is a diagram showing the connection effect of the test wire connectors according to the present invention;

FIG. 4 is a three-dimensional view of a test line connector according to the present invention;

FIG. 5 is a view of the construction of the internally threaded insulating sleeve of the present invention;

FIG. 6 is a structural view of a conductive sheet according to the present invention;

FIG. 7 is an enlarged view of a portion of the receptacle of the present invention;

fig. 8 is a diagram showing the effect of the present invention.

In the figure: the test wire comprises a clamping arm 1, an arm rod section 101, a handle rod section 102, a conductive column 103, a jack 104, an elastic sheet 105, a clamping head 2, an elastic piece 3, an insulating sleeve 4, a test wire connector 5, an internal thread insulating sleeve 501, a conductive sheet 502, a wire lug 503, a test wire 6 and a measuring pen point 7.

Detailed Description

The preferable scheme is as shown in fig. 1 to 8, the special clamping component for measuring the insulation resistance and the absorption ratio of the stator winding comprises two clamping arms 1, wherein the two clamping arms 1 are hinged, and the hinged point divides the clamping arms 1 into an arm rod section 101 and a handle rod section 102; the front section of the arm rod section 101 is bent downwards, and the end part of the front section of the arm rod section 101 is connected with a chuck 2; the handle rod segments 102 are provided with insulating sleeves 4, the two handle rod segments 102 are connected through elastic pieces 3, the end part of one handle rod segment 102 is detachably connected with a test wire connector 5, and the test wire connector 5 is detachably connected with a test wire 6.

The length of the arm-rod section 101 is 15-18cm, and the bending angle of the front section of the arm-rod section 101 is 90-120 degrees. The length of the handle rod section 102 is 8-10cm, and the insulating sleeve 4 is made of plastic or rubber. Preferably, the arm segment 101 is externally sheathed with an insulating sheath. The two clamping arms 1 form a structure similar to a fire-tongs, and as shown in figure 8, the component is convenient to use at a position with a narrow wiring space. The clamping arm 1 and the clamping head 2 can be made of copper materials, the clamping head 2 is a square metal block, a convex tooth clamping surface is arranged on the square metal block, and the convex tooth clamping surface is used for increasing friction force.

Further, the test wire connector 5 comprises an internal thread insulating sleeve 501, a conducting strip 502 is rotatably arranged in the internal thread insulating sleeve 501, and the conducting strip 502 is used for being connected with the test wire 6; the internal thread insulating sleeve 501 is in threaded connection with the conductive post 103, and the conductive post 103 is connected with the handle bar segment 102.

After the internal thread insulating sleeve 501 is connected with the conductive post 103, the conductive post 103 is in contact with the conductive sheet 502. The conducting strip 502 is provided with a lug 503, and the lug 503 is used for being connected with the core of the test wire 6. When the internal thread insulation sleeve 501 rotates, the conducting strip 502 does not rotate along with the internal thread insulation sleeve 501, so that the core of the test wire 6 is prevented from being twisted off, and the core is a conductor of the test wire 6.

Further, to enhance the utility of the present member, the following structure is added to the handle segment 102: the end of the other handle section 102 is provided with a jack 104, an elastic sheet 105 is arranged in the jack 104, and the jack 104 is used for inserting the measuring pen head 7. The measuring pen point 7 is the pen point of an ammeter, a voltmeter or a multimeter, the conductive part at the front end of the measuring pen point 7 is used for being inserted into the jack 104, and the elastic sheet 105 is used for clamping the conductive part at the front end of the measuring pen point 7.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. A special clamping component for measuring insulation resistance and absorption ratio of stator winding is characterized in that: the clamp comprises two clamp arms (1), wherein the two clamp arms (1) are hinged, and the hinge point divides the clamp arms (1) into an arm rod section (101) and a handle rod section (102); the front section of the arm rod section (101) is bent downwards, and the end part of the front section of the arm rod section (101) is connected with a chuck (2); the test wire testing device is characterized in that an insulating sleeve (4) is arranged on each handle rod section (102), the two handle rod sections (102) are connected through an elastic piece (3), the end portion of one handle rod section (102) is detachably connected with a test wire connector (5), and the test wire connector (5) is detachably connected with a test wire (6).

2. The dedicated clamping member for measuring insulation resistance and absorption ratio of a stator winding according to claim 1, wherein: the test wire connector (5) comprises an internal thread insulating sleeve (501), a conducting strip (502) is rotatably arranged in the internal thread insulating sleeve (501), and the conducting strip (502) is used for being connected with the test wire (6); the internal thread insulating sleeve (501) is in threaded connection with the conductive column (103), and the conductive column (103) is connected with the handle rod section (102).

3. The dedicated clamping member for measuring insulation resistance and absorption ratio of a stator winding according to claim 2, wherein: the conducting strip (502) is provided with a lug (503), and the lug (503) is used for being connected with a wire core of the test wire (6).

4. The dedicated clamping member for measuring insulation resistance and absorption ratio of a stator winding according to claim 1, wherein: the end part of the other handle rod section (102) is provided with a jack (104), an elastic sheet (105) is arranged in the jack (104), and a measuring pen point (7) is inserted in the jack (104).

5. The dedicated clamping member for measuring insulation resistance and absorption ratio of a stator winding according to claim 1, wherein: the clamping head (2) is a square metal block, and the square metal block is provided with a convex tooth clamping surface; the arm section (101) is provided with an insulating layer.