CN104237571B - For the pressurized line support meanss of test of lightning arrester - Google Patents

Abstract

The invention discloses a pressurized line support device for lightning arrester test, which comprises an insulating rod (2) and a fitting (3) installed on the top of the insulating rod (2), the insulating rod (2) and the lightning arrester (1) Parallel, characterized in that the fitting (3) includes a long contact (31), one end of the long contact (31) is vertically connected to the arrester (1), and the other end is connected to the pressure line (4). The pressurized line support device used in the arrester test of the present invention can increase the distance between the arrester and the pressurized line, and make the pressurized line and the arrester be installed at an angle of 90°, which can greatly improve the accuracy of the test value and has the advantages of It has the advantages of simple and compact structure, low cost and convenient installation.

Description

Pressurized wire support device for arrester testing

technical field

The invention relates to the technical field of electric power, in particular to a pressurized line support device used for lightning arrester tests.

Background technique

In the power system, under normal circumstances, the high-voltage lead wires and high-voltage output terminals are exposed to the air, and there are certain stray currents and leakage currents flowing through them to the ground, to the insulating support and to adjacent equipment, which is very important for the arrester test. The results are huge.

In order to reduce the influence of stray capacitance, the most convenient way to improve the test method is to change the distance between the high-voltage output line and the arrester body and install the high-voltage output line and the arrester body at an angle of 90°, which can greatly improve the test value. the accuracy. Therefore, when doing the leakage current test of the arrester, in order to ensure the accuracy of the measurement, the measuring wire should form an angle of 90° with the arrester body as much as possible, and at the same time, pay attention to keep a sufficient distance between the pressure line and the metal shell of the arrester.

In the field test of the arrester, due to the limitation of the field test conditions, we often clamp the pressure line to the metal contact at the top of the insulating rod, and then hang the insulating rod on the high voltage side of the arrester. Since the off-the-shelf insulating rod fittings on the market cannot rotate and are short (the longest contact length is no more than 15cm), it is difficult to ensure that the pressure line and the arrester body form an angle of 90°, and at the same time, the pressure line and the metal shell of the arrester are also It is difficult to ensure a sufficient distance. When the voltage level is high (110kV and above voltage level), the test values vary greatly between phases and individuals, and the resulting error is particularly obvious; Due to the limitation of the short size of the contacts during the measurement, it is necessary for the test personnel to repeatedly move the test instrument, resulting in low work efficiency.

Contents of the invention

The technical problem to be solved by the present invention is: aiming at the above-mentioned problems existing in the prior art, the present invention provides a pressurized line support device for lightning arrester tests with simple and compact structure, low cost and easy installation. The holding tool can increase the distance between the arrester and the pressurized line, and install the pressurized line and the arrester at an angle of 90°, which can greatly improve the accuracy of the test value.

In order to achieve the above object, the pressurized wire support device for arrester test of the present invention includes an insulating rod and a fitting installed on the top of the insulating rod, the insulating rod is parallel to the arrester; the fitting includes a long contact, one end of the long contact It is vertically connected to the arrester, and the other end is connected to the pressurized line. In this scheme, the long contact can keep a sufficient distance between the arrester and the pressurized line, and the long contact fittings act as a part of the test line, ensuring the verticality between the pressurized line and the arrester, which can greatly improve the test value the accuracy.

As a further improvement of the present invention, a rotating disk is installed on the above-mentioned fittings, so that the fittings and insulating rods are movably connected, so that the inclination of the fittings on the insulating rods can be adjusted, and then the angle between the long contacts on the fittings and the arrester can be adjusted.

Further, in order to make the above-mentioned pressurized wire clamping tool suitable for measurement of different heights, the above-mentioned insulating rod is a retractable structure.

Preferably, the above-mentioned hardware is made of brass.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. In the present invention, the fittings adopt long contacts, which can keep a sufficient distance between the arrester and the pressurized line, and improve the accuracy of the test value;

2. In the present invention, the long contact fittings act as a part of the test line, ensuring the verticality between the pressurized line and the arrester, which can greatly improve the accuracy of the test value;

3. In the present invention, a rotating disk is installed on the hardware, and the inclination angle of the metal fitting on the insulating rod can be adjusted through the rotating disk, and the length of the insulating rod can be adjusted at the same time, which has strong versatility;

4. The present invention has simple and compact structure, low cost and convenient installation.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the installation schematic diagram of the present invention;

Figure 3 is a top view of the present invention.

Legend: 1. Lightning arrester; 2. Insulating rod; 3. Fitting; 31. Long contact; 4. Pressure line; 5. Rotary disk; 6. Microammeter; 7. Test system.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

【Example 1】

As shown in Fig. 1, Fig. 2 and Fig. 3, the pressurized line support device used for the arrester test in this embodiment includes an insulating rod 2 and a fitting 3 installed on the top of the insulating rod 2, wherein: the insulating rod 2 is parallel to the arrester 1 , the fitting 3 includes a long contact 31 , one end of the long contact 31 is vertically connected to the arrester 1 , and the other end is connected to the pressurized line 4 . In Fig. 1, 6 is a microammeter, and 7 is a test system. In this embodiment, the long contact 31 can keep a sufficient distance between the arrester 1 and the pressurized line 4, and the long contact 31 of the fitting 3 acts as a part of the test line, ensuring the distance between the pressurized line 4 and the arrester 1. The verticality can greatly improve the accuracy of the test value.

[Example 2]

On the basis of Embodiment 1, in the pressurized wire support device used in the arrester test in this embodiment, the rotating disc 5 for adjusting the angle between the long contact 31 and the arrester 1 is installed on the fitting 3, so that the fitting 3 is movably connected with the insulating rod 2, so that the inclination of the fitting 3 on the insulating rod 2 can be adjusted, and then the angle between the long contact 31 and the arrester 1 can be adjusted. In this embodiment, the rotating disk 5 has two advantages. One is that when the angle between the long contact 31 and the arrester 1 is not 90 degrees, the rotating disk 5 can be used to adjust the angle to 90 degrees; When the number of lightning arresters 1 is large and the geographical location is complicated, it is only necessary to rotate the rotating disk 5 on the fitting 3 to adjust the angle of the fitting 3 on the insulating rod 2, and the next lightning arrester 1 can be tested without moving the test instrument , greatly improving work efficiency.

[Example 3]

As shown in Figure 1, on the basis of the above-mentioned embodiment, in order to make the pressurized line support device for the arrester test in the present embodiment applicable to the measurement of different heights, the above-mentioned insulating rod 2 is a telescopic structure, and the telescopic structure It can be realized by using telescopic technology commonly used in this field, for example but not limited to: the insulating rod 2 is a telescopic rod; or the insulating rod 2 is composed of a moving rod and a chute. The structure is fixed at any position of the chute at any time. The above-mentioned fittings 3 are made of brass.

The above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (3)

1. The clamping tool for the pressurized wire used for the arrester test, including the insulating rod (2) and the fitting (3) installed on the top of the insulating rod (2), the insulating rod (2) is parallel to the arrester (1), and its The feature is that the fitting (3) includes a long contact (31), one end of the long contact (31) is vertically connected to the lightning arrester (1), and the other end is connected to the pressure line (4); the insulating rod (2) It consists of a moving rod and a chute, and the moving rod can move in the chute. 2. The pressurized wire clamping tool for arrester testing according to claim 1, characterized in that a rotating disk (5) is installed on the fitting (3). 3. The pressurized wire clamping tool for lightning arrester test according to claim 1 or 2, characterized in that the fitting (3) is made of brass.