CN107703335B - Voltage signal access clip for resistive current test of arrester and method of using the same - Google Patents

Abstract

The invention relates to a voltage signal receiving device for testing the resistive current of a lightning arrester and a using method thereof, wherein a receiving clamp is in a crocodile clamp shape and comprises a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are mutually connected in a rotating way; the head of the main clamp extends outwards to form a cross screwdriver head, the tail end of the cross screwdriver head is connected with a spiral spring in an abutting mode, and the spiral spring is movably embedded in the main clamp; a plurality of crocodile teeth are arranged on the inner side of the end part of the auxiliary clamp along the length direction; the tail parts of the main clamp and the auxiliary clamp are respectively sleeved with an insulating sleeve; the tail of the main clamp is also inwards provided with a connecting hole for connecting an electric power test wire, and the connecting hole and the cross screwdriver head can be electrically communicated. The invention has the beneficial effects that: the device can be firmly fixed at the lower end of the to-be-tested air switch, and meanwhile, the conductive part of the device can be fully contacted with the conductive part at the lower end of the to-be-tested air switch, so that the voltage can be reliably obtained.

Description

Voltage signal access clip for resistive current test of arrester and method of using the same

technical field

The invention relates to a voltage signal access device used for resistive current testing of arresters.

Background technique

The arrester resistive current test is a test item regularly performed by the substation inspection personnel on the arrester, and the arrester resistive current tester is required to complete the test. During the test process of the instrument, a voltage quantity is required as a reference signal. Usually, the voltage signal is received from the lower end of the measuring circuit breaker in the terminal box of the voltage transformer.

When connecting the test wiring for voltage access to the measuring circuit breaker, do not disconnect the measuring circuit breaker or remove the wiring at the lower end of the circuit breaker, otherwise the measurement circuit will lose power. Therefore, the current access to the voltage signal is usually to use a test lead with an alligator clip, and the alligator clip is directly clamped to the conductive part of the lower end of the measurement air switch. However, due to the structure of the alligator clip, it cannot be fully contacted with the conductive part of the measurement space. The alligator clip and the conductive part of the measurement space often have poor contact, resulting in the inability to obtain the voltage during the use of the arrester resistive current tester. Condition that caused the test to be interrupted.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a voltage signal access device for the resistive current test of the arrester in view of the above shortcomings, so as to realize reliable voltage signal acquisition.

The solution adopted by the present invention to solve the technical problem is: a voltage signal receiving clip for resistive current testing of arresters, the receiving clip is in the shape of an alligator clip, and includes a main clip and an auxiliary clip, the main clip and the auxiliary clip The clips are rotatably connected to each other; the head of the main clip extends outward with a Phillips screwdriver head, and the tail end of the Phillips screwdriver head abuts a coil spring, and the coil spring is movably embedded in the main clip; The inner side of the end of the auxiliary clip is provided with a number of crocodile teeth along the length direction; the tails of the main clip and the auxiliary clip are respectively sleeved with an insulating sleeve; the tail of the main clip is also provided with a connection for connecting the power test line inward. The connecting hole and the Phillips screwdriver head can be electrically connected.

Further, the main clamp and the auxiliary clamp are rotatably connected to each other through a rotating shaft, and a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected to the main clamp and the auxiliary clamp.

Further, the connection hole is connected to one end of the power test line, and the other end of the electrical connection test line is connected to a voltage collection device.

Further, the head of the Phillips screwdriver extends into the conductive bolt at the lower end of the space to be measured, and is in contact with the conductive bolt.

The invention also provides a method of using a voltage signal access clip for the resistive current test of the arrester. The staff holds the insulating sleeves of the main clip and the auxiliary clip to control the opening and closing of the main clip and the auxiliary clip; access the voltage When there is a signal, insert one end of the power test wire into the connection hole, contact the connection hole, and connect the other end to the voltage acquisition device of the arrester resistive current tester; The conductive bolt is in contact with the conductive bolt. At this time, the head of the Phillips screwdriver is retracted inward, the coil spring is compressed, and the crocodile teeth at the end of the auxiliary clip bite the lower end of the opening to be measured, so that the receiving clip is fixed on the opening to be measured. The lower end of the air switch; after the coil spring is compressed, the reverse force acts on the head of the Phillips screwdriver, and the head of the Phillips screwdriver presses the conductive bolt, so that the head of the Phillips screwdriver fully contacts the conductive bolt; the voltage of the air switch to be measured conducts electricity from the lower end The bolt is connected to the connection hole through the cross screwdriver head, and is input to the voltage acquisition device through the power test line to complete the acquisition of the voltage signal.

Compared with the prior art, the present invention has the following beneficial effects: the access clip provided by the present invention is used to collect the voltage signal of the circuit breaker to be measured, so as to ensure the reliability during the access process, and can be firmly fixed in the measurement circuit. When the lower end is opened, the conductive part can also be fully contacted with the conductive part of the lower end of the open circuit to be measured, so as to obtain the voltage reliably.

Description of drawings

The patent of the present invention is further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of an access clip provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of a process of using an access clip according to an embodiment of the present invention.

In the picture: 1-main clamp; 2-auxiliary clamp; 3-cross head screwdriver; 4-coil spring; 5-crocodile tooth; 6-insulation sleeve; 7-connection hole; 8-power test wire; Open; 90-conductive bolt; 10-rotating shaft.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 2, a voltage signal access clip for the resistive current test of a surge arrester in this embodiment is in the shape of an alligator clip, including a main clip 1 and a secondary clip 2. The main clip The clip 1 and the auxiliary clip 2 are rotatably connected to each other; the head of the main clip 1 is provided with a cross-bolt cutter head 3 extending outward, and the tail end of the cross-bolt cutter head 3 abuts a coil spring 4, and the coil spring 4 is movably embedded in the main clip 1; the inner side of the end of the auxiliary clip 2 is provided with a number of crocodile teeth 5 along the length direction; the tails of the main clip 1 and the auxiliary clip 2 are respectively sleeved with an insulating sleeve 6; A connecting hole 6 for connecting the power test wire 8 is also provided in the tail of the main clip 1 , and the connecting hole 6 and the cross-bolt bit 3 can be electrically connected.

As can be seen from the above, the beneficial effect of the present invention is that: through the cooperation of the cross-bolt cutter head 3 at the main clamp 1 and the coil spring 4, the conductive bolt 90 at the lower end of the opening 9 to be measured can be pressed, and the conductive bolt 90 is fully contacted, so as to be reliable of the acquired voltage. The cross-bolt cutter head 3 is electrically connected to the connection hole 7 to realize the transmission of the voltage signal to the voltage acquisition device through the power test line 8 . The connecting hole 7 is provided with a fixing seat in contact with the connecting hole 7 for fixing the power test wire 8 .

In this embodiment, the main clamp 1 and the auxiliary clamp 2 are connected to each other through a rotating shaft 10, and a torsion spring is sleeved on the rotating shaft 10, and the two ends of the torsion spring are respectively connected to the main clamp 1 and the auxiliary clamp 2. . The torsion spring ensures that the main clamp 1 and the auxiliary clamp 2 are reset after being opened.

In this embodiment, the connection hole 7 is connected to one end of the power test wire 8 , and the other end of the electrical connection test wire is connected to a voltage collection device.

In this embodiment, the cross-bolt bit 3 extends into the conductive bolt 90 at the lower end of the opening 9 to be measured, and is in contact with the conductive bolt 90 .

The present invention also provides a method of using a voltage signal access clip for the resistive current test of the arrester. The staff holds the insulating sleeves 6 of the main clip 1 and the auxiliary clip 2, and controls the opening of the main clip 1 and the auxiliary clip 2. When receiving the voltage signal, insert one end of the power test wire 8 into the connection hole 7, contact with the connection hole 7, and the other end is connected to the voltage acquisition device of the arrester resistive current tester; 3. Reach into the conductive bolt 90 at the lower end of the opening 9 to be measured, and contact the conductive bolt 90. At this time, the cross-bolt cutter head 3 shrinks inward, the coil spring 4 is compressed, and the crocodile teeth at the end of the auxiliary clamp 2 5. Bite the lower end of the air switch 9 to be measured, so that the receiving clip is fixed at the lower end of the air switch 9 to be measured; after the coil spring 4 is compressed, the reverse force acts on the cross bolt cutter head 3, and the cross bolt cutter head 3. Press the conductive bolt 90 so that the cross-bolt cutter head 3 is in full contact with the conductive bolt 90; the voltage of the air switch 9 to be measured is conducted from the lower conductive bolt 90 through the cross-bolt cutter head 3 to the connection hole 7, and through the power test line 8 Input to the voltage acquisition device to complete the acquisition of the voltage signal.

To sum up, the present invention provides a voltage signal pick-up clip for resistive current testing of a lightning arrester and a method of using the same, which have simple structure, convenient operation, and can achieve reliable acquisition of voltage signals.

The above preferred embodiments further describe the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc. made should be included within the protection scope of the present invention.

Claims (5)

1. a voltage signal pick-up clip for arrester resistive current test, it is characterized in that: described pick-up clip is crocodile clip shape, comprises main clip and auxiliary clip, and described main clip and auxiliary clip are mutually rotatably connected; The head of the main clip extends outward with a Phillips screwdriver head, the tail end of the Phillips screwdriver head abuts a coil spring, and the coil spring is movably embedded in the main clip; the end of the auxiliary clip The inner side is provided with a number of crocodile teeth along the length direction; the tail parts of the main clip and the auxiliary clip are respectively sleeved with an insulating sleeve; the tail part of the main clip is also provided with a connection hole for connecting the power test line inward, and the connection The hole and the Phillips screwdriver head can be electrically connected. 2. The voltage signal pick-up clip for arrester resistive current test according to claim 1, characterized in that: the main clip and the auxiliary clip are connected to each other through a rotating shaft, and a torsion spring is sleeved on the rotating shaft , the two ends of the torsion spring are respectively connected to the main clamp and the auxiliary clamp. 3. The voltage signal access clip for arrester resistive current testing according to claim 1, wherein the connection hole is connected to one end of the power test line, and the other end of the power test line is connected to a Voltage acquisition device. 4. The voltage signal receiving clip for the resistive current test of the arrester according to claim 1, characterized in that: the head of the Phillips screwdriver extends into the conductive bolt at the lower end of the air opening to be measured, and is connected with the conductive bolt. touch. 5. A method of using a voltage signal pick-up clip for arrester resistive current testing according to any one of claims 1-4, characterized in that: The staff holds the insulating sleeves of the main clamp and the auxiliary clamp to control the opening and closing of the main clamp and the auxiliary clamp; when receiving the voltage signal, insert one end of the power test wire into the connection hole, contact the connection hole, and connect the other end The voltage acquisition device of the arrester resistive current tester; then the Phillips screwdriver head is inserted into the conductive bolt at the lower end of the air opening to be tested, and contacts with the conductive bolt. At this time, the Phillips screwdriver head is retracted inward, and the coil spring is Press down, the crocodile teeth at the end of the auxiliary clip bite the lower end of the air switch to be measured, so that the receiving clip is fixed at the lower end of the air switch to be measured; after the coil spring is pressed, the reverse force acts on the Phillips screwdriver head, The Phillips screwdriver head presses the conductive bolt, so that the Phillips screwdriver head is in full contact with the conductive bolt; the voltage of the open circuit to be measured is conducted from the bottom conductive bolt through the Phillips screwdriver head to the connection hole, and is input to the voltage acquisition device through the power test line to complete the voltage signal acquisition.

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