High-voltage cable partial discharge monitoring device

Abstract

The utility model discloses a high voltage cable partial discharge monitoring device, and relates to the cable partial discharge monitoring technology field, two sides of a housing of a discharge detection unit are oppositely connected with two groups of arm power connecting rods, and the other end of each group of arm power connecting rods is connected with an elastic force stretching assembly. The bottom of the elastic stretching assembly is provided with a positioning clamping sleeve which is integrally connected with the elastic stretching assembly. Based on the combination of the positioning clamping sleeve and the fastening bolt, the partial discharge monitoring device is installed on the high-voltage cable in a doubling mode, daily partial discharge monitoring work is carried out through the discharge detection unit, and in the daily partial discharge monitoring process, through the elastic stretching and retracting characteristic of the elastic stretching assembly and traction supporting of the arm power connecting rod, the partial discharge monitoring device can be used for monitoring the partial discharge of the high-voltage cable. The high-voltage cable tension device can be synchronously stretched along with thermal expansion and cold contraction of a high-voltage cable caused by seasons, and can be synchronously stretched and deformed along with the tension relaxation change of the high-voltage cable, so that the damage to the doubling assembly of the high-voltage cable is reduced, and the connection looseness caused by tension friction can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cable partial discharge monitoring, especially to a kind of monitoring device of high-voltage cable partial discharge. BACKGROUND

[0002] At present, the application of cable partial discharge online monitoring technology in the monitoring of high-voltage cable is very extensive. By monitoring the partial discharge of cable in real time, potential faults of cable can be found in time to avoid the expansion of faults to cause greater losses. For example, as shown in the online monitoring system for underground high-voltage insulated cable (publication number CN216595365U) disclosed by China patent network, the high-voltage cable partial discharge monitoring device of this type opens the upper shell and the lower shell relative to each other, so that the gap between the two can directly place the cable into the cable placement slot, and then the upper shell and the lower shell are returned to position, the two groups of threaded rods are locked by threads, and the high-voltage cable is fastened to avoid falling off. The internal detection unit is used for partial discharge monitoring.

[0003] However, the high-voltage cable partial discharge monitoring device adopted by the above-mentioned published patent and the existing market still has some deficiencies: the existing form of high-voltage cable partial discharge monitoring device has relatively stable assembly characteristics, but is limited by seasonal reasons. The high-voltage cable will expand and contract with heat and cold, and the cable length will be tensioned and relaxed with the change of season, which will cause the partial discharge monitoring device installed on the cable to be pulled by force, and the friction will be loose under the tension and relaxation of the cable. Long-term stable installation is insufficient. Therefore, the technical personnel in the field provide a kind of monitoring device of high-voltage cable partial discharge to solve the problems raised in the above background technology. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of monitoring device of high-voltage cable partial discharge, which solves the problem of insufficient long-term installation stability of the existing high-voltage cable partial discharge monitoring device raised in the above background technology.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme: a kind of monitoring device of high-voltage cable partial discharge, including discharge detection unit;

[0006] The two sides of the shell of the discharge detection unit are connected with two groups of arm force connecting rods in opposite form, and the other end of each group of arm force connecting rods is connected with elastic tension assembly;

[0007] The bottom of the elastic tension assembly is provided with an integral positioning sleeve, and the opposite clamping port of the positioning sleeve is connected with a fastening bolt;

[0008] The elastic tension assembly includes a guide sleeve, and a telescopic guide rod connected with the pulling arm force connecting rod is inserted into the inner sleeve of the guide sleeve.

[0009] As a further technical scheme of the utility model: the telescopic spring of telescopic guide rod is arranged in the cylinder sleeve of guide sleeve, and the telescopic stopper of flat compression telescopic spring is arranged along the axial direction of telescopic guide rod.

[0010] As a further technical scheme of the utility model: the arm force connecting rod is Y type connecting rod structure.

[0011] As a further technical scheme of the utility model: the opposite clamping opening of positioning sleeve is provided with positioning jack that is matched with fastening bolt.

[0012] As a further technical scheme of the utility model: the bottom of discharge detection unit is provided with let go slot.

[0013] As a further technical scheme of the utility model: the clamping surface gasket of positioning sleeve has insulating pad, and the insulating pad is made of natural rubber or silica gel material.

[0014] The utility model provides a kind of monitoring device of high voltage cable partial discharge, and compared with prior art has following beneficial effects:

[0015] 1. The design is based on the combination of positioning sleeve and fastening bolt, installs partial discharge monitoring device on high voltage cable, carries out routine partial discharge monitoring work using discharge detection unit, and in the process of routine partial discharge monitoring, by using the elastic extension characteristics of elastic tensioning assembly and the pulling support of arm force connecting rod, it can be stretched with high voltage cable thermal expansion and contraction caused by season, and synchronous stretching, synchronous extension deformation with the tensioning relaxation change of high voltage cable, reduce the damage of high voltage cable parallel assembly, and avoid the connection loosening caused by tensioning friction, improve its long-term use characteristics.

[0016] 2. The partial discharge monitoring device of the design is used in daily life, when high voltage cable is in summer hot state and relaxation, the elastic tensioning assembly reduces the elastic pulling force of arm force connecting rod, discharge detection unit is lowered under self-weight, and is lowered close to high voltage cable, maintains appropriate monitoring direction, and when high voltage cable is in winter cold state and tensioning, the elastic tensioning assembly increases the elastic pulling force of arm force connecting rod, and pulls discharge detection unit to move up, and is moved up with high voltage cable, maintains appropriate monitoring direction, to better perform dynamic monitoring work. DRAWINGS

[0017] Figure 1 It is a kind of structural schematic diagram of the monitoring device of high voltage cable partial discharge;

[0018] Figure 2 It is a kind of monitoring device of high voltage cable partial discharge elevational view;

[0019] Figure 3 A partial sectional view of a monitoring device for partial discharge of a high-voltage cable;

[0020] Figure 4 A disassembly schematic view of a monitoring device for partial discharge of a high-voltage cable.

[0021] In the figure: 1, discharge detection unit; 11, let go of the slot; 2, arm force connecting rod; 3, elastic tension assembly; 31, guide sleeve; 32, telescopic guide rod; 33, telescopic spring; 34, telescopic stop block; 4, positioning sleeve; 41, positioning hole; 5, fastening bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] Please refer to Figures 1-4 The present application provides a monitoring device for partial discharge of a high-voltage cable technical scheme: a monitoring device for partial discharge of a high-voltage cable, comprising a discharge detection unit 1, two groups of arm force connecting rods 2 are connected in a facing manner on both sides of the shell of the discharge detection unit 1, the arm force connecting rod 2 is a Y-shaped connecting rod structure, through the setting of the arm force connecting rod 2, on the one hand, as a connecting component, the discharge detection unit 1 is fixed, on the other hand, as a pulling component, the discharge detection unit 1 is driven to pull displacement synchronously with the tensioning relaxation of the high-voltage cable.

[0024] The other end of each group of arm force connecting rods 2 is connected with an elastic tension assembly 3, the elastic tension assembly 3 comprises a guide sleeve 31, a telescopic guide rod 32 connected with the pulling arm force connecting rod 2 is inserted through the inside of the sleeve of the guide sleeve 31, a telescopic spring 33 which sleeves the telescopic guide rod 32 is arranged in the inside of the sleeve of the guide sleeve 31, and the telescopic guide rod 32 is provided with a telescopic stop block 34 which flattens the telescopic spring 33 along its axial direction, by using the elastic combination of the telescopic stop block 34 and the telescopic spring 33, the telescopic guide rod 32 can be elastically telescoped along the guide sleeve 31, as an elastic pulling force, synchronously telescoped with the tensioning relaxation of the high-voltage cable, on the one hand, reducing the damage of the partial discharge monitoring device to the parallel assembly of the high-voltage cable, on the other hand, the discharge detection unit 1 maintains the dynamic proximity characteristic, and the high-voltage cable is monitored.

[0025] The bottom of the elastic stretching assembly 3 is provided with a positioning sleeve 4 connected integrally, the opposite clamping openings of the positioning sleeve 4 are connected through the fastening bolts 5, the opposite clamping openings of the positioning sleeve 4 are provided with positioning insertion holes 41 matched with the fastening bolts 5, the clamping surface of the positioning sleeve 4 is provided with an insulating pad, the insulating pad is made of natural rubber or silica gel material, the positioning sleeve 4 is clamped on the high-voltage cable through the elastic expansion opening of the positioning sleeve 4, then the positioning sleeve 4 is stably clamped on the high-voltage cable through the screw tightening of the fastening bolts 5, and the partial discharge monitoring device is firmly and fixedly connected on the high-voltage cable.

[0026] The bottom of the discharge detection unit 1 is provided with a displacement slot 11, the displacement slot 11 is used as a through groove of the high-voltage cable, so that the high-voltage cable passes through the discharge detection unit 1 and is more closely attached.

[0027] The working principle of the utility model is as follows: when the partial discharge monitoring device is used for monitoring the partial discharge of the high-voltage cable, the two groups of positioning sleeves 4 are clamped on the high-voltage cable through the elastic expansion opening of the positioning sleeve 4, then the positioning sleeve 4 is stably clamped on the high-voltage cable through the screw tightening of the fastening bolts 5, and the discharge detection unit 1 is firmly and fixedly connected on the high-voltage cable.

[0028] Then, in the process of monitoring the partial discharge of the high-voltage cable, when the high-voltage cable is relaxed in the hot summer, the elastic pulling force of the elastic stretching assembly 3 on the arm force connecting rod 2 is reduced, so that the discharge detection unit 1 is lowered under the self-weight state and is synchronously lowered and close to the high-voltage cable, and when the high-voltage cable is tensioned in the cold winter, the elastic pulling force of the elastic stretching assembly 3 on the arm force connecting rod 2 is increased, so that the discharge detection unit 1 is pulled and moved upward, and is synchronously moved upward with the tensioning of the high-voltage cable, so as to maintain a proper monitoring direction and better perform the monitoring work, and the partial discharge monitoring device is synchronously stretched and deformed with the tensioning and relaxation of the high-voltage cable, so as to reduce the damage to the high-voltage cable assembly, avoid the connection loosening caused by the tensioning friction, and have a longer safe service life.

[0029] The above only describes the preferred embodiments of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model. The structures, devices and operation methods not described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A monitoring device for partial discharge in high-voltage cables, characterized in that, Includes a discharge detection unit (1); The discharge detection unit (1) has two sets of arm force connecting rods (2) connected to each other on both sides of its housing, and the other end of each set of arm force connecting rods (2) is connected to the elastic tension component (3). The bottom of the elastic tension component (3) is provided with an integrally connected positioning sleeve (4), and the clamping opening of the positioning sleeve (4) is connected with a fastening bolt (5). The elastic tension assembly (3) includes a guide sleeve (31), and a telescopic guide rod (32) connected to the tension arm force link (2) is inserted through the sleeve of the guide sleeve (31).

2. The monitoring device for partial discharge of high-voltage cables according to claim 1, characterized in that, The guide sleeve (31) has a telescopic spring (33) for a ring-shaped telescopic guide rod (32) inside the sleeve, and the telescopic guide rod (32) has a telescopic stop (34) for a flat-pressure telescopic spring (33) along its axial direction.

3. The monitoring device for partial discharge of high-voltage cables according to claim 1, characterized in that, The arm force link (2) is a Y-shaped link structure.

4. The monitoring device for partial discharge of high-voltage cables according to claim 1, characterized in that, The positioning sleeve (4) has a positioning insertion hole (41) that is compatible with the fastening bolt (5) at the clamping opening.

5. The monitoring device for partial discharge of high-voltage cables according to claim 1, characterized in that, The bottom of the discharge detection unit (1) is provided with a clearance slot (11).

6. The monitoring device for partial discharge of high-voltage cables according to claim 1, characterized in that, The positioning sleeve (4) has an insulating pad on its clamping surface, which is made of natural rubber or silicone.

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