CN106953183B - Leakage current extraction equipment for wheel test - Google Patents

Abstract

The invention proposes a leakage current extraction device used in a wheel method test, which includes a multi-way contact device. Wherein, the conductive contact in the contact device is fixed and electrically connected with one end of the conductive connecting rod, the insulating position fixing block has a through hole, the conductive connecting rod passes through the through hole, and the lead wire is fastened to the other end of the conductive connecting rod through a nut. It is electrically connected with the conductive connecting rod, and the spring is arranged on the outer periphery of the conductive connecting rod. One end of the spring extends into the conductive contact to withstand the internal terminal of the conductive contact, and the other end of the spring withstands the insulating position fixing block. Driven by the spring, the conductive contact and the conductive connecting rod can move relative to the fixed block at the insulating position. During the test of the rotating wheel method, the electrical contact between the conductive contact and the collector ring can be ensured, and the reliability of the leakage current lead-out equipment is relatively low. Poor, prone to technical problems of poor contact.

Description

Leakage current extraction equipment for wheel test

technical field

The invention relates to the field of testing of composite insulators, in particular to a leakage current extraction device used in the test of the wheel method.

Background technique

Since the appearance of composite insulators in the middle of the 20th century, due to its excellent anti-pollution flashover performance, light weight, high mechanical strength, convenient installation and maintenance and many other advantages, it has been used more and more, and its use has increased rapidly in the past 20 years. growth of.

The research on the aging performance of composite insulators is one of the key research fields of composite insulators. Since the 1970s, there have been tests on the rotor method for composite insulators in the world, but in the following years, there has been no great progress. In recent years, in the process of discussing the aging test method of composite insulators, because the 5000h comprehensive aging test method is too complicated and difficult to repeat the test, the runner method has been proposed again and has been written into the standards of some countries or organizations. In 2005 In the 2012 version of the IEC 62217 standard, the runner method was included in the appendix as a tracking and corrosion test method, and then the runner method was written into the IEC technical report IEC/TR 62730 in 2012.

IEC/TR 62730 does not describe the wheel method equipment in detail, but only gives a simple schematic diagram of the key parts. Different researchers design different test equipment according to their own ideas. Since the test insulator is always rotating, how to lead the leakage current to the leakage current measurement system is always one of the most difficult problems in the rotary wheel method equipment. At present, the commonly used method is to directly use a fixed copper sheet to contact the metal fittings of the insulator, and the end of the copper sheet is connected to the lead wire. With the rotation of the device, the copper sheet is in contact with the fittings of the four insulators in turn, thereby sequentially leading to the leakage of the four insulators. current. This method is simple and easy to implement, but its reliability is poor, and it is prone to poor contact.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

For this reason, the first purpose of the present invention is to propose a kind of leakage current drawing equipment that is used for wheel method test, to realize reliability high and can be used for multiple leakage current drawing equipment, solve the leakage current in the prior art The reliability of the lead-out equipment is poor, and technical problems such as poor contact are prone to occur.

In order to achieve the above purpose, the embodiment of the first aspect of the present invention proposes a leakage current extraction device and a multi-way contact device for the test of the wheel method;

Wherein, the contact device includes: a conductive contact 1, a conductive connecting rod 2, a spring 3, a nut 4, a lead wire 6 and an insulating position fixing block 7;

The conductive contact 1 is fixed and electrically communicated with one end of the conductive connecting rod 2;

The insulating position fixing block 7 has a through hole, and the conductive connecting rod 2 passes through the through hole;

The lead wire 6 is fastened to the other end of the conductive connecting rod 2 through the nut 4, and electrically communicated with the conductive connecting rod 2;

The spring 3 is in a compressed state and is arranged on the outer periphery of the conductive connecting rod 2 . One end of the spring 3 bears against the conductive contact 1 , and the other end of the spring 3 bears against the insulating position fixing block 7 .

Optionally, as a possible implementation, the lower part of the conductive contact 1 is rod-shaped;

The lower part of the conductive contact 1 is provided with an internal thread, and one end of the conductive connecting rod 2 is provided with an external thread, and the external thread of the conductive connecting rod 2 is matched with the internal thread of the conductive contact 1 .

Optionally, as a possible implementation, the other end of the conductive connecting rod 2 is provided with an external thread to match the internal thread of the nut 4;

The contact device further includes pads 5 ; the lead wire 6 is arranged between at least two pads 5 and is closely attached to the pads 5 .

Optionally, as a possible implementation, in the insulating position fixing block 7, the diameter of the lower part of the through hole matches the diameter of the conductive connecting rod 2, and the diameter of the upper part of the through hole is larger than that of the through hole The diameter of the lower part, there is a boundary plane between the upper part and the lower part of the through hole;

The other end of the spring 3 is arranged inside the upper part of the through hole, and bears against the boundary plane of the through hole.

Optionally, as a possible implementation, the insulating position fixing block 7 is fixed relative to the slip ring, and the conductive contact 1 and the conductive connecting rod 2 are driven by the spring 3 relative to the insulating The position fixing block 7 is retractable along the axial direction; one end of the spring 3 extends into the conductive contact 1 and bears against the inner terminal of the conductive contact 1 .

Optionally, as a possible implementation manner, the top of the conductive contact 1 is hemispherical, and is in electrical contact with the slip ring.

The leakage current extraction equipment used in the wheel method test according to the embodiment of the present invention includes a multi-way contact device. Among them, the conductive contact 1 in the contact device is fixed and electrically connected with one end of the conductive connecting rod 2, the insulating position fixing block 7 has a through hole, the conductive connecting rod 2 passes through the through hole, and the lead wire 6 is fastened to the conductive connecting rod 2 through the nut 4. The other end of the connecting rod 2 is electrically connected with the conductive connecting rod 2, and the spring 3 is arranged on the outer periphery of the conductive connecting rod 2. One end of the spring 3 extends into the conductive contact 1 and withstands the internal terminal of the conductive contact 1. The spring 3 The other end withstands the insulating position fixing block 7. Driven by the spring, the conductive contact 1 and the conductive connecting rod 2 can move relative to the fixed block 7 at the insulating position. During the test of the rotation method, the electrical contact between the conductive contact 1 and the collector ring can be ensured, and the leakage current is drawn out from the equipment. The reliability is poor, and it is prone to technical problems such as poor contact.

Part is set forth in the description which follows, and part will be obvious from the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural view of a leakage current extraction device used in a wheel method test provided by an embodiment of the present invention;

Fig. 2 is a boundary diagram of a leakage current extraction device used in the wheel method test provided by the embodiment of the present invention; and

FIG. 3 is a cross-sectional view of the insulating position fixing block 7 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

A leakage current drawing device for a wheel method test according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a leakage current extraction device used in a wheel method test provided by an embodiment of the present invention. Leakage current extraction equipment for the wheel method test, including multiple contact devices.

Wherein, each contact device includes: a conductive contact 1 , a conductive connecting rod 2 , a spring 3 , a nut 4 , a lead wire 6 and an insulating position fixing block 7 .

As shown in FIG. 1 , the conductive contact 1 is fixed and electrically communicated with one end of the conductive connecting rod 2 . The insulating position fixing block 7 has a through hole through which the conductive connecting rod 2 passes; the lead wire 6 is fastened to the other end of the conductive connecting rod 2 through the nut 4 and electrically connected with the conductive connecting rod 2 . The spring 3 is in a compressed state and is arranged on the outer periphery of the conductive connecting rod 2 . One end of the spring 3 withstands the conductive contact 1 , and the other end of the spring 3 withstands the insulating position fixing block 7 .

Optionally, the top of the conductive contact 1 is hemispherical, so as to be in electrical contact with the slip ring during use.

Further, in a possible embodiment, the lower part of the conductive contact 1 is rod-shaped; the lower part of the conductive contact 1 is provided with an internal thread, and one end of the conductive connecting rod 2 is provided with an external thread, and the conductive connecting rod 2 is provided with an external thread. The external thread of the rod 2 cooperates with the internal thread of the conductive contact 1 .

Further, the other end of the conductive connecting rod 2 is provided with an external thread to match the internal thread of the nut 4; the contact device also includes a gasket 5; the lead wire 6 is arranged on at least two of the gaskets 5, and fit closely with the gasket 5.

Furthermore, in the insulating position fixing block 7, the diameter of the lower part of the through hole matches the diameter of the conductive connecting rod 2, the diameter of the upper part of the through hole is larger than the diameter of the lower part of the through hole, and the diameter between the upper part and the lower part of the through hole is There is a boundary plane between them; the other end of the spring 3 is arranged inside the upper part of the through hole, and bears against the boundary plane of the through hole.

During the test process of the rotation method, the insulating position fixing block 7 is fixed relative to the slip ring, and the conductive contact 1 and the conductive connecting rod 2 are driven by the spring 3 relative to the insulating position fixing block 7 along the axial direction. It is stretchable; one end of the spring 3 extends into the conductive contact 1 and bears against the inner terminal of the conductive contact 1 .

It can be seen that the leakage current extraction device provided in this embodiment can be used in the wheel test of composite insulators. The leakage current extraction equipment includes multi-channel retractable contact devices. Figure 2 is a boundary diagram of a leakage current extraction equipment used in the wheel method test provided by the embodiment of the present invention. As shown in Figure 2, each contact The head device includes a conductive contact 1, a conductive connecting rod 2, a spring 3, a nut 4, a washer 5, a lead wire 6, and an insulating position fixing block 7, wherein the top of the conductive contact 1 is hemispherical, the lower part is rod-shaped, and has an inner Thread, one end of the conductive connecting rod 2 has an external thread, which matches the internal thread of the conductive contact, and the other end has an external thread. The lead wire 6 is tightened by the nut 4 and the gasket 5, and is electrically connected with the conductive connecting rod 2. The spring 3 is sleeved on the outside of the conductive connecting rod, and a section extends into the inside of the conductive contact 4 .

Fig. 3 is a sectional view of the insulating position fixing block 7. As shown in Fig. 3, the insulating position fixing block 7 has a through hole, and the conductive connecting rod 2 can pass through the through hole. The diameters of the connecting rod 2 match, and the diameter of the upper part is larger, and the spring 3 can be accommodated therein. The length of the spring 3 is moderate, one end bears against the internal terminal of the conductive contact 1, and one section bears against the interface between the two different-diameter holes in the through hole of the insulating position fixing block 7, and is in a compressed state.

The working principle of the present invention is as follows: when in use, the insulating position fixing block 7 is fixed, and the system composed of the conductive contact 1, the conductive connecting rod 2 and the spring 3 can expand and contract along the axial direction. Arresting the conductive contact 1 on the rotating equipment such as the collector ring can ensure the electrical contact between the conductive contact 1 and the rotating equipment such as the collector ring, and lead out the required electrical signal. By adding an insulating part to the collector ring, each conductive area contacts with the conductive contact 1 sequentially during the rotation, so that different electrical signals can be extracted separately. More current signals can be drawn out through the combination of multiple channels.

Accordingly, the leakage current extraction device provided in this embodiment can ensure the electrical contact between the conductive contact and the rotating equipment such as the collector ring, and extract the required electrical signal. By adding an insulating part to the collector ring, each conductive area and the conductive contact are sequentially contacted during the rotation process, so that different electrical signals can be extracted separately. More current signals can be drawn out through the combination of multiple channels.

To sum up, in this embodiment, the leakage current extraction equipment used for the wheel method test includes a multi-way contact device. Among them, the conductive contact 1 in the contact device is fixed and electrically connected with one end of the conductive connecting rod 2, the insulating position fixing block 7 has a through hole, the conductive connecting rod 2 passes through the through hole, and the lead wire 6 is fastened to the conductive connecting rod 2 through the nut 4. The other end of the connecting rod 2 is electrically connected with the conductive connecting rod 2, and the spring 3 is arranged on the outer periphery of the conductive connecting rod 2. One end of the spring 3 extends into the conductive contact 1 and withstands the internal terminal of the conductive contact 1. The spring 3 The other end withstands the insulating position fixing block 7. Driven by the spring, the conductive contact 1 and the conductive connecting rod 2 can move relative to the fixed block 7 at the insulating position. During the test of the rotation method, the electrical contact between the conductive contact 1 and the collector ring can be ensured, and the leakage current is drawn out from the equipment. The reliability is poor, and it is prone to technical problems such as poor contact.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Claims (6)

1. a kind of leakage current for Tracking wheel test draws equipment, which is characterized in that including multichannel contact apparatus, for drawing The leakage current of multiple insulators out；

Wherein, the contact apparatus include: conductive contact (1), conductive link (2), spring (3), nut (4), lead (6) and absolutely Edge position fixed block (7)；

One end of the conductive contact (1) and conductive link (2) is fixed and electrical communication；

The Insulated positions fixed block (7) has a through-hole, and the conductive link (2) passes through the through-hole；

The lead (6) is anchored on the other end of the conductive link (2) by nut (4), electrical with the conductive link (2) Connection；

The spring (3) is under compressive state, is set to the conductive link (2) periphery, and one end of the spring (3) is withstood Conductive contact (1), the other end of the spring (3) withstand the Insulated positions fixed block (7).

2. the leakage current according to claim 1 for Tracking wheel test draws equipment, which is characterized in that the conduction Contact (1) lower part is in the shape of a rod；

The lower part of the conductive contact (1) is provided with internal screw thread, and one end of the conductive link (2) is provided with external screw thread, described The external screw thread of conductive link (2) is matched with the internal screw thread of the conductive contact (1).

3. the leakage current according to claim 1 for Tracking wheel test draws equipment, which is characterized in that the conduction The other end of connecting rod (2) is provided with external screw thread, matches with the internal screw thread of the nut (4)；

The contact apparatus further includes gasket (5)；The lead (6) is set between at least two gaskets (5), and with The gasket (5) fits closely.

4. the leakage current according to claim 1 for Tracking wheel test draws equipment, which is characterized in that the insulation In position fixed block (7), the through-hole lower diameter is matched with the diameter of the conductive link (2), and the through-hole top is straight Diameter is greater than the through-hole lower diameter, has an interface plane between the through-hole upper and lower part；

The other end of the spring (3) is set to the inside on the through-hole top, and withstands the interface plane of the through-hole.

5. the leakage current according to claim 1 for Tracking wheel test draws equipment, which is characterized in that the insulation Position fixed block (7) is fixed with respect to collector ring, the band of the conductive contact (1) and the conductive link (2) in the spring (3) The relatively described Insulated positions fixed block (7) is scalable in the axial direction under dynamic；One end of the spring (3) puts in the conductive touching Head (1) is internal, withstands the inside terminals of conductive contact (1).

6. the leakage current according to claim 1-5 for Tracking wheel test draws equipment, which is characterized in that The top of the conductive contact (1) is hemispherical, with collector ring electrical contact.