Distribution network traveling wave fault distance measuring device

Abstract

The utility model discloses a distribution network traveling wave fault distance measuring device which comprises a box body, the box body comprises an upper box body and a lower box body, one side of the upper box body and one side of the lower box body are connected through a pivoting piece, the other side of the upper box body and the other side of the lower box body are connected through a clamping assembly, and the clamping assembly comprises a first connecting block, a second connecting block, a crankshaft and a telescopic pin. The first connecting block is fixed to the side portion of the upper box body, the second connecting block is fixed to the side portion of the lower box body, the crankshaft is arranged in the first connecting block, the two telescopic pins are symmetrically connected to the two sides of the crankshaft, and the second connecting block is provided with clamping grooves matched with the telescopic pins. According to the utility model, the box body and the power cable can be assembled and disassembled only by rocking the rocking handle, the main journals on the two sides drive the telescopic pins to stretch out and draw back by rocking the rocking handle, so that the telescopic pins penetrate into the clamping grooves or are separated from the clamping grooves, the operation is simple and labor-saving, the maintenance cost and time are reduced, and the high-altitude operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, and particularly relates to a traveling wave fault location device for a distribution network. Background Technique

[0002] With the continuous improvement of the automation level of the power system, the traveling wave fault location device for the distribution network plays an increasingly important role in the fault detection and location of the power system. When a fault occurs in the distribution network, traveling waves will be generated at the fault point. These traveling waves propagate along the line to both ends. By capturing these traveling wave signals through the fault location device and analyzing them, rapid early warning and accurate location of the fault can be achieved, thereby effectively shortening the fault recovery time and improving the stability and reliability of the power system.

[0003] The traveling wave fault location device for the distribution network is usually divided into distributed ranging and integrated ranging according to different installation positions and installation methods. Among them, the distributed ranging device is generally installed at the beginning and end of the power line. However, when the current distributed ranging device is connected to the cable, multiple bolts are basically used for fixation. When the device needs to be inspected or replaced, the process of disassembling and reinstalling the bolts is cumbersome and complex, increasing the maintenance cost and time. Especially when working at height in a narrow space inside the lift table, it is even more inconvenient. Moreover, the bolt connection may gradually become loose due to vibration and other reasons after long-term operation, resulting in unstable connection and even slipping phenomenon, which will not only affect the accuracy of fault ranging, but also pose a threat to the safe operation of the power grid. Content of the Utility Model

[0004] The purpose of the utility model is to provide a traveling wave fault location device for a distribution network, which has the advantages of convenient disassembly and assembly and stable connection, and solves the problems in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A traveling wave fault location device for a distribution network includes a box body. The box body includes an upper box body and a lower box body. One side of the upper box body and the lower box body is connected by a pivot member, and the other side is connected by a clamping component. The clamping component includes a first connecting block, a second connecting block, a crankshaft and a telescopic pin. The first connecting block is fixed to the side of the upper box body, the second connecting block is fixed to the side of the lower box body, the crankshaft is arranged inside the first connecting block, two telescopic pins are symmetrically connected to both sides of the crankshaft, and the second connecting block is provided with a clamping groove matched with the telescopic pin.

[0007] Preferably, the crankshaft is a symmetrical structure. Threads with opposite rotation directions are arranged on the main journal on both sides of the crankshaft. An inner hole for the main journal to penetrate is arranged inside the telescopic pin, and the telescopic pin is in threaded cooperation with the main journal.

[0008] Preferably, a rocker is sleeved on the connecting rod journal in the middle of the crankshaft, and the rocker is rotatably connected to the connecting rod journal.

[0009] Preferably, limiting grooves are symmetrically arranged on both sides inside the first connecting block, and the telescopic pin is located in the limiting groove and is slidably connected to the first connecting block.

[0010] Preferably, the length of the telescopic pin is twice the extended length of the clamping groove.

[0011] Preferably, half grooves are arranged on the contact surfaces of the upper box body and the lower box body, and the upper and lower half grooves form a complete through groove for the power line to pass through.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For the present utility model, only by shaking the rocker can the installation and disassembly of the box body and the power cable be completed. Shaking the rocker makes the main journal on both sides drive the telescopic pin to expand and contract, so that it penetrates into or disengages from the clamping groove. The operation is simple and labor-saving, reducing the maintenance cost and time, and facilitating the carrying out of high-altitude operations.

[0014] 2. The crankshaft in the present utility model is difficult to rotate itself under non-human force. Even if there is a small rotation, it will not cause a large displacement of the telescopic pin, thus ensuring the connection stability between the first connecting block and the second connecting block, avoiding the situation of gradually loosening due to vibration and other reasons after long-term operation, and effectively guaranteeing the safe operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the first axonometric drawing of the overall structure of the present utility model;

[0016] Figure 2 is the second axonometric drawing of the overall structure of the present utility model;

[0017] Figure 3 is the open state drawing of the upper box body and the lower box body of the present utility model;

[0018] Figure 4 is the cross-sectional view of the first connecting block and the second connecting block of the present utility model;

[0019] Figure 5 is the connection relationship drawing of the telescopic pin and the clamping groove of the present utility model.

[0020] In the figure: 1. Box body; 11. Upper box body; 12. Lower box body; 13. Hinge member; 14. Half groove; 2. Clamping component; 21. First connecting block; 22. Second connecting block; 23. Crankshaft; 231. Main journal; 232. Connecting rod journal; 24. Telescopic pin; 25. Clamping groove; 26. Inner hole; 27. Limiting groove; 3. Through groove; 4. Rocker. Detailed implementation mode

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In order to solve the problems of inconvenient disassembly and assembly and poor connection stability in the prior art, the following technical solutions are given. Please refer to Figures 1-5 ;

[0023] A distribution network traveling wave fault location device includes a box body 1, the box body 1 includes an upper box body 11 and a lower box body 12, half grooves 14 are provided on the contact surfaces of the upper box body 11 and the lower box body 12, and the upper and lower half grooves 14 are combined into a complete through groove 3 for a power line to penetrate. One side of the upper box body 11 and the lower box body 12 is connected by a pivot member 13, and the other side is connected by a clamping component 2. During installation, the power cable is placed into the through groove 3, the upper box body 11 and the lower box body 12 are combined, and the upper box body 11 and the lower box body 12 are clamped by the clamping component 2 to complete the clamping of the power cable, so as to monitor the traveling wave generated by the power cable.

[0024] The clamping component 2 includes a first connection block 21, a second connection block 22, a crankshaft 23 and a telescopic pin 24. The first connection block 21 is fixed to the side of the upper box body 11, the second connection block 22 is fixed to the side of the lower box body 12, the crankshaft 23 is arranged inside the first connection block 21, two telescopic pins 24 are provided and symmetrically connected to both sides of the crankshaft 23, and the second connection block 22 is provided with a card slot 25 matching with the telescopic pin 24, and the telescopic pin 24 can penetrate into the card slot 25; the crankshaft 23 is a symmetric structure, threads with opposite rotation directions are provided on the main journal 231 on both sides of the crankshaft 23, an inner hole 26 for the main journal 231 to penetrate is provided inside the telescopic pin 24, and the telescopic pin 24 is in threaded cooperation with the main journal 231. When the crankshaft 23 rotates, the main journals 231 on both sides of it drive the two telescopic pins 24 to move towards or away from each other through the threads.

[0025] A rocker handle 4 is sleeved on a connecting rod journal 232 in the middle of a crankshaft 23. The rocker handle 4 is rotatably connected to the connecting rod journal 232. On both sides inside the first connecting block 21, limiting grooves 27 are symmetrically arranged. A telescopic pin 24 is located in the limiting groove 27 and is slidably connected to the first connecting block 21. By shaking the rocker handle 4, the connecting rod journal 232 is driven to rotate around the axis of the main journal 231. The connecting rod journal 232 drives the main journal 231 to rotate through a crank, and thus the telescopic pin 24 moves towards or away from each other under the action of the limiting groove 27. The length of the telescopic pin 24 is twice the extended length of the clamping groove 25. When the end of the telescopic pin 24 touches the end of the clamping groove 25, the lengths of the telescopic pin 24 located in the clamping groove 25 and the limiting groove 27 are equal, thereby ensuring the connection stability between the first connecting block 21 and the second connecting block 22.

[0026] Working principle: During installation, the upper box body 11 and the lower box body 12 are opened, and the power cable is placed between the two half grooves 14. Then the upper box body 11 and the lower box body 12 are combined, so that the first connecting block 21 and the second connecting block 22 are attached to each other. By shaking the rocker handle 4, the connecting rod journal 232 drives the main journal 231 to rotate through a crank, causing the telescopic pin 24 to move away from each other under the action of the limiting groove 27. The telescopic pin 24 penetrates into the clamping groove 25 and abuts against the end of the clamping groove 25, and the first connecting block 21 and the second connecting block 22 are connected through the telescopic pin 24, thereby realizing the firm clamping of the power cable by the upper box body 11 and the lower box body 12. The disassembly is also carried out in the same way.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to this process, method, article or device.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. A distribution network traveling wave fault distance measuring device, comprising a box body (1), characterized in that: The box body (1) comprises an upper box body (11) and a lower box body (12); one side of the upper box body (11) and the lower box body (12) are connected by a pivot member (13), and the other side is connected by a clamping assembly (2); the clamping assembly (2) comprises a first connecting block (21), a second connecting block (22), a crankshaft (23) and a telescopic pin (24); the first connecting block (21) is fixed to the side of the upper box body (11); the second connecting block (22) is fixed to the side of the lower box body (12); the crankshaft (23) is arranged inside the first connecting block (21); two telescopic pins (24) are provided and symmetrically connected to two sides of the crankshaft (23); and the second connecting block (22) is provided with a clamping groove (25) matched with the telescopic pin (24).

2. A distribution network traveling wave fault distance measuring device according to claim 1, characterized in that: The crankshaft (23) is of symmetrical structure. The main journals (231) on both sides of the crankshaft (23) are provided with threads with opposite rotation directions. The telescopic pin (24) is provided with an inner hole (26) for the main journal (231) to pass through. The telescopic pin (24) is threadedly matched with the main journal (231).

3. A distribution network traveling wave fault distance measuring device according to claim 2, characterized in that: A crank handle (4) is sleeved on a connecting rod journal (232) in the middle of the crankshaft (23), and the crank handle (4) is rotatably connected to the connecting rod journal (232).

4. A distribution network traveling wave fault distance measuring device according to claim 3, characterized in that: Limiting grooves (27) are symmetrically arranged on both sides of the first connecting block (21), and the telescopic pin (24) is located in the limiting groove (27) and is slidably connected to the first connecting block (21).

5. A distribution network traveling wave fault distance measuring device according to claim 4, characterized in that: The length of the telescopic pin (24) is twice the extension length of the clamping slot (25).

6. A distribution network travelling wave fault distance measuring device according to claim 5, characterized in that: The contact surfaces of the upper box body (11) and the lower box body (12) are both provided with half grooves (14), and the upper and lower half grooves (14) are combined into a complete through groove (3) through which the power line passes.

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