A lightning arrester AC leakage current detection tool

Abstract

The present invention relates to the field of lightning arrester live detection, namely, a lightning arrester AC leakage current detection tool. It includes a lower end angle adjuster and an upper end angle adjuster on an insulating rod; the upper end angle adjuster chip is connected to a current receiving device through a second connecting rod; the current receiving device includes an external metal outer sheath, an embedded spring mechanism is connected to a conductive bar, and a friction barb for removing a metal oxide film is provided on the outer side of the external metal outer sheath; one end of a contact terminal composed of a plurality of small cylindrical terminals receives a current signal at the lightning arrester end, and the other end of the contact terminal is fixed and connected to the conductive bar, which is connected to a test line connection terminal through a soft connection, and forms a current path with the test line and is connected to the instrument end. It has the characteristics of compact structure, simple operation, and convenient carrying.

Description

Technical Field

[0001] The invention relates to the field of lightning arrester live detection, in particular to an arrester AC leakage current detection tool. Background Art

[0002] As a primary device to prevent substation equipment from being damaged by overvoltage, the arrester is of great significance to the stable operation of the power system. The AC leakage current detection of the arrester is based on the full current and the fundamental peak of the resistive current in its operating state to determine whether the arrester is damp and whether the metal oxide valve plate is deteriorated. Compared with power outage detection, AC leakage current detection can better grasp the performance of the arrester in real time under the operating state, and can better reflect the true state of the equipment. When measuring the leakage current, it is necessary to connect the test line to the test point of the arrester before reading the corresponding data on the device. However, there are several problems in the actual operation process: 1. The installation position and height of the arrester are different, and some arresters are surrounded by wire mesh fences with diamond-shaped openings on the outside, which causes inconvenience to the test wiring. 2. The arrester test point is exposed to the air for a long time, eroded by rain, and there is an oxide film on the surface, which affects the test data.

[0003] 3. When using a traditional insulating rod to connect the test line, since you can only stand directly below the arrester counter, you cannot observe whether the arrester counter pointer has returned to zero, and a dedicated person is required to observe. 4. After the traditional insulating rod head is overlapped at the test point, it is easy to cause multiple points of connection, directly short-circuiting the test equipment and causing the meter to have no reading. Make a lightning arrester AC leakage current detection tool. There is no such device on the market. Summary of the invention

[0004] The purpose of the present invention is to provide a lightning arrester AC leakage current detection tool which has a compact structure, is simple to operate and is easy to carry.

[0005] The technical solution of the present invention is: a lightning arrester AC leakage current detection tool, characterized in that it includes an insulating rod, the upper end of which is connected to the detection tool end fastener through an insulating rod fastener; the upper part of the detection tool fastener is connected to the lower end angle adjuster; the lower end angle adjuster includes an angle adjuster clip and an angle adjuster chip inserted into the angle adjuster clip; the angle adjuster clip is provided with a clip angle adjustment socket and a clip hexagonal bolt socket, and is equipped with a hexagonal bolt that passes through the clip hexagonal bolt socket and the chip hexagonal bolt socket to connect it to the angle adjuster chip; a plurality of chip angle adjustment sockets are provided on the angle adjuster chip, and a wing screw 4 is inserted into the clip angle adjustment socket and the chip angle adjustment socket to adjust its angle A fixed connection is made; the lower end of the connecting rod is connected to the upper angle adjuster chip, the upper end of the connecting rod is fixedly connected to the upper angle adjuster, and the structure of the upper angle adjuster is consistent with that of the lower angle adjuster; the upper angle adjuster chip is connected to the current receiving device through the second connecting rod; the current receiving device includes an external metal outer sheath, an embedded spring mechanism is connected to the conductive barb, and a friction barb for removing the metal oxide film is provided on the outside of the external metal outer sheath; the contact terminal composed of a plurality of small cylindrical terminals is longer than the metal outer sheath, one end of the contact terminal receives the current signal of the arrester end, and the other end of the contact terminal is fixed and connected to the conductive bar, the conductive bar is connected to the test line connection terminal through a soft connection, and forms a current path with the test line and is connected to the instrument end.

[0006] The above structure utilizes two angle adjusters to realize various morphological changes of the tool, so that it can be suitable for lightning arresters of different heights and positions; at the same time, for lightning arresters on insulating pillars, the angle adjuster can be used to enable the wiring personnel to stand diagonally below the lightning arrester, so as to directly observe the changes in the counter pointer; secondly, friction hooks are also provided on the outside of the current connection device, which can effectively remove the metal oxide film at the test point and improve the measurement accuracy; finally, by extending the length of the connecting rod between the two angle controllers, the phenomenon of multiple points of contact between the lightning arrester and the tool is avoided, effectively improving the test efficiency.

[0007] In the above scheme, the angle adjuster is composed of a circular metal chip and a circular metal clip with a gap of the same size as the chip in the middle. There are equal-sized circular holes at the center of the chip and the clip, and the two are connected and fixed by a metal bolt. There is a circular hole every 30° in the upper semicircle of the chip, for a total of seven, marked 0°, 30°, 60°, 90°, 120°, 150° and 180° from left to right. There is an equal-sized circular hole at the same position just above the center of the clip. Angle adjustment is achieved through these circular holes, and it is fixed by a wing screw that can be rotated manually.

[0008] In the above scheme, the current receiving device is composed of a metal outer sheath, a friction hook, a contact terminal, a conductive bar, a spring mechanism and a test line connection terminal. The contact terminal, the conductive bar and the test line connection terminal are connected to form a path with the lightning arrester and the test equipment to form a test circuit.

[0009] In the above scheme, the clip of the lower angle adjuster is connected to the insulating rod, and the chip is connected to the clip of the upper angle adjuster through a connecting rod; the chip of the upper angle adjuster is connected to the current receiving device through a small connecting rod.

[0010] The advantages of the present invention are: 1. The tool adopts two angle adjusters to realize the detection of AC leakage current of lightning arresters at different installation positions, making the test safer and more convenient; 2. The tool is provided with friction barbs for removing the oxide film on the surface of the lightning arrester test part, making the test result more accurate; 3. The design of the tool effectively avoids the multi-point contact phenomenon during the test process and shortens the operation time; 4. When the tool is used, the operator can quickly observe the movement of the lightning arrester counter pointer to improve the operation efficiency; 5. The current receiving device adopts a spring contact structure, which can directly receive the current signal on the plane, or it can be buckled on the lightning arrester base screw, and the screw is embedded in the current receiving device, which effectively increases the contact area and reduces the influence of the tool on the test data.

[0011] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present invention.

[0013] Figure 2 This is a simplified diagram of the angle adjuster chip structure in the lower angle adjuster.

[0014] Figure 3 This is a simplified diagram of the angle adjuster clip structure outside the lower angle adjuster.

[0015] Figure 4 It is a simplified diagram of the enlarged structure of the current receiving device. DETAILED DESCRIPTION

[0016] See also Figure 1-4, the names of the parts are as follows: detection tool end fastener 1, lower end angle adjuster 2, chip angle adjustment socket 3, wing screw 4, hexagonal bolt 5, upper end angle adjuster 6, current connection device 7, test line connection terminal 8, contact terminal 9, conductive barb 10, friction barb 11, spring mechanism 12, metal outer sheath 13, test line 14, insulating rod fastener 15, insulating rod 16, clip angle adjustment socket 17, clip hexagonal bolt socket 18, chip hexagonal bolt socket 19, angle adjuster chip 20, angle adjuster clip 21, connecting rod 22, second connecting rod 23.

[0017] See also Figure 1 -4, a lightning arrester AC leakage current detection tool, which includes an insulating rod 16, the upper end of which is connected to the detection tool end fastener 1 (internal thread) through an insulating rod fastener 15 (external thread); the upper part of the detection tool fastener 1 is connected to the lower end angle adjuster 2; the lower end angle adjuster 2 includes an angle adjuster clip 21 and an angle adjuster chip 20 inserted into the angle adjuster clip 21; the angle adjuster clip 21 is provided with a clip angle adjustment socket 17 and a clip hexagonal bolt socket 18, and is equipped with a hexagonal bolt 5 that passes through the clip hexagonal bolt socket 18 and the chip hexagonal bolt socket 19 to connect it with the angle adjuster chip 20; seven chip angle adjustment sockets 3 are left on the angle adjuster chip 20, and the wing screw 4 is inserted into the clip angle adjustment socket 17 and the chip angle adjustment socket 3 to fix its angle; the lower end of the connecting rod 22 It is connected to the upper angle adjuster chip 20, and the upper end of the connecting rod 22 is fixedly connected to the upper angle adjuster 6, and the structure of the upper angle adjuster 6 is consistent with that of the lower angle adjuster 2; the upper angle adjuster chip 20 (placed in the upper angle adjuster 6) is connected to the current receiving device 7 through the second connecting rod 23; the current receiving device 7 includes an external metal outer sheath 13, an embedded spring mechanism 12 connected to the conductive bar 10, and a friction barb 11 (serrated) for removing the metal oxide film is provided on the outer side of the external metal outer sheath 13; the contact terminal 9 composed of a plurality of small cylindrical terminals is slightly longer than the metal outer sheath 13, one end of the contact terminal 9 receives the current signal of the arrester end, and the other end of the contact terminal 9 is fixed and connected to the conductive bar 10, and the conductive bar 10 is connected to the test line connection terminal 8 through a soft connection, and forms a current path with the test line 14 and is connected to the instrument end.

[0018] When using the present invention to detect the lightning arrester installed at a high place, first adjust the upper angle adjuster 6 to 0°, adjust the lower angle adjuster 2 to 30°, and tighten the wing screw 4. Then fasten one end of the test line 14 to the test line connection terminal 8, and the other end is connected to the test equipment. The operator holds the insulating rod 16, and the insulating rod 16 and the equipment form an angle of 60°. The operator can stand at a distance of 1 / 2 the length of the insulating rod directly in front of the equipment, and can clearly observe the changes in the pointer of the lightning arrester counter while performing the operation. During operation, the friction barb 11 can first be used to rub the lightning arrester test point to remove the metal oxide film on the surface and improve the accuracy of the test. Then the current access device 7 is placed on the lightning arrester test point, at which time the contact terminal is tightly in contact with the test point, and the force presses the conductive bar 10 and the spring mechanism 12 to be tightly connected together. At this time, a current path is formed between the arrester under test and the test equipment through the contact terminal 9, the conductive bar 10, the test line connection terminal 8 and the test line 14, so that the AC leakage current of the arrester can be detected without climbing.

[0019] When the present invention is used to detect a lightning arrester installed at a low place and surrounded by a wire mesh fence with a diamond-shaped opening, the upper angle adjuster 6 is adjusted to 90°, the lower angle adjuster 2 is adjusted to 0°, and the thumb screw 4 is tightened. Then one end of the test line 14 is fastened to the test line connection terminal 8, and the other end is connected to the test equipment. The operator holds the insulating rod 16, and the insulating rod 16 and the equipment form an angle of 90°. The operator can complete the detection of the AC leakage current of the lightning arrester without squatting on the ground.

[0020] The above description is only a specific implementation mode of the present invention, and various examples do not constitute a limitation on the essential content of the present invention.

Claims

1. A lightning arrester AC leakage current detection tool, characterized in that It comprises an insulating rod (16), the upper end of which is connected to a detection tool end fastener (1) via an insulating rod fastener (15), and the insulating rod fastener (15) and the detection tool end fastener (1) are connected via external threads and internal threads; the upper part of the detection tool fastener (1) is connected to a lower end angle adjuster (2); the lower end angle adjuster (2) comprises an angle adjuster clip (21) and an angle adjuster chip (20) inserted into the angle adjuster clip (21); the angle adjuster The angle adjusting socket (17) and the hexagon bolt socket (18) of the clamping piece are reserved on the adjusting piece clamping piece (21), and the hexagon bolt (5) is connected to the angle adjusting chip (20) by passing through the hexagon bolt socket (18) of the clamping piece and the hexagon bolt socket (19) of the chip; a plurality of chip angle adjusting sockets (3) are reserved on the angle adjusting chip (20), and the wing screw (4) is inserted into the clamping piece angle adjusting socket (17) and the chip angle adjusting socket (3) to fix the angle thereof. The lower end of the connecting rod (22) is connected to the upper angle adjuster chip (20), and the upper end of the connecting rod (22) is fixedly connected to the upper angle adjuster (6), and the structure of the upper angle adjuster (6) is consistent with that of the lower angle adjuster (2); the upper angle adjuster chip (20) is connected to the current receiving device (7) through the second connecting rod (23); the current receiving device (7) includes an external metal outer sheath (13), an embedded spring mechanism (12) connected to the conductive bar (10) A friction barb (11) for removing a metal oxide film is provided on the outside of an external metal outer sheath (13); a contact terminal (9) composed of a plurality of fine cylindrical terminals is longer than the metal outer sheath (13); one end of the contact terminal (9) receives a current signal from a lightning arrester end; the other end of the contact terminal (9) is fixed and connected to a conductive bar (10); the conductive bar (10) is connected to a test line connection terminal (8) through a flexible connection, and forms a current path with a test line (14) and is connected to an instrument end.

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