Cable partial discharge online monitoring equipment

Abstract

The utility model particularly relates to cable partial discharge online monitoring equipment, which is characterized in that one end of an open type high-frequency current sensor is fixedly connected with a hinging piece, the end part of a rotating shaft of the hinging piece is fixedly connected to one end of a lower clamping block, the other end of the lower clamping block is fixedly connected with a positioning bin, and one side of the inner wall of the positioning bin is fixedly connected with a reset pressing piece; an elastic clamping head is arranged on the lower portion of the reset pressing piece, one end of the elastic clamping head is fixedly connected to one end of a first spring, the other end of the first spring is fixedly connected to the bottom of the positioning bin, a clamping plate is clamped to the other end of the elastic clamping head, and the end of a pressing plate is fixedly connected to the other end of the open type high-frequency current sensor. A finger pressing plate is fixedly connected to a plate body of the pressing plate, a pressure bearing piece is arranged on the lower portion of the clamping plate, the middle of the pressure bearing piece is fixedly connected to one end of a second spring, the other end of the second spring is fixedly connected to the bottom of the positioning bin, and a fixed rail is slidably connected to the side of the pressure bearing piece.

Description

Technical Field

[0001] The utility model relates to the field of monitoring equipment, in particular to an on-line monitoring equipment for partial discharge of cables. Background Art

[0002] High-voltage cables are increasingly used for power transmission and distribution in more and more places. All high-voltage power cables have been subjected to very precise tests in the factory. However, cable heads (cable joints or cable terminals) are made after the cables leave the factory, and there is a risk of partial discharge. Most cable faults are caused by faults in cable terminal joints. Therefore, it is necessary to detect partial discharge in cable joints and cable terminals. In order to ensure the safe operation of power cables, it is required to conduct withstand voltage and partial discharge tests after the joints are made.

[0003] Through high-frequency current sensors installed at the grounding down-lead of high-voltage cable joints, each on-line monitoring unit detects the pulsed current generated after partial discharge occurs inside the cable. The test data is transmitted to the on-line monitoring server software in the background through the network. When installing the existing open-type pulsed current sensor, the cable needs to be buckled, and then the duckbill buckle lock provided on the side of the open-type pulsed current sensor needs to be pressed and buckled with both hands. This structure allows the operator to observe the position of the duckbill buckle lock with the eyes, and then both hands need to cooperate to buckle it. This method increases the operation difficulty of workers during high-altitude operations. Therefore, an on-line monitoring equipment for partial discharge of cables is proposed for the above problems. Content of the Utility Model

[0004] In order to make up for the deficiencies of the prior art, the utility model proposes an on-line monitoring equipment for partial discharge of cables.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an on-line monitoring equipment for partial discharge of cables, including an open-type high-frequency current sensor. One end of the open-type high-frequency current sensor is fixedly connected with a hinge member. The end of the rotating shaft of the hinge member is fixedly connected to one end of a lower clamping block. The other end of the lower clamping block is fixedly connected with a positioning bin. One side of the inner wall of the positioning bin is fixedly connected with a reset pressing member. A resilient chuck is arranged below the reset pressing member. One end of the resilient chuck is fixedly connected to one end of a first spring. The other end of the first spring is fixedly connected to the bottom of the positioning bin. The other end of the resilient chuck is clamped with a clamping plate. The end of the clamping plate is fixedly connected with a pressing plate. The end of the pressing plate is fixedly connected to the other end of the open-type high-frequency current sensor. A finger pressing plate is fixedly connected to the plate body of the pressing plate. A bearing member is arranged below the clamping plate. The middle of the bearing member is fixedly connected to one end of a second spring. The other end of the second spring is fixedly connected to the bottom of the positioning bin. The side of the bearing member is slidably connected with a fixed track. The end of the fixed track is fixedly connected to the inner wall of the positioning bin.

[0006] Preferably, the reset pressing member includes: a first sliding groove and a fixed limiting block. A first sliding groove is formed in the middle of the reset pressing member. The first sliding groove is slidably connected to one end of the fixed limiting block, and the other end of the fixed limiting block is fixedly connected to the inner wall of the positioning bin;

[0007] Preferably, the clamping plate includes: a cut block and a through groove. The end of the clamping plate is fixedly connected to the end of the cut block, and a through groove is formed in the block of the clamping plate;

[0008] Preferably, the pressure-bearing member includes: a second groove and a second sliding groove. A second sliding groove is formed in the side of the pressure-bearing member. The second sliding groove is slidably connected to the end of the fixed track. A second groove is formed in the middle of the pressure-bearing member, and the inner wall of the second groove is fixedly connected to the end of the second spring;

[0009] Preferably, the elastic chuck includes: a chuck and a pressing plate. The end of the rotating shaft of the elastic chuck is fixedly connected to the inside of the positioning bin. One end of the elastic chuck is fixedly connected to the end of the chuck, and the other end of the elastic chuck is fixedly connected to the end of the pressing plate;

[0010] Preferably, a first groove is formed in the lower part of the pressing plate, and the inner wall of the first groove is fixedly connected to the end of the first spring.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. Through the cut design at the contact part between the cut block and the chuck of the present utility model, when the cut block moves downward, it smoothly pushes the chuck open, and then the chuck is stuck in the through groove, thereby completing the fixation of the open-type high-frequency current sensor and the lower clamping block. Such a fixation method is simple. When the positions of the positioning bin and the pressing plate are in an installation dead angle, it is not necessary to deliberately observe with the eyes, and the fixation of the two can be completed by relying on the feeling of the hand;

[0013] 2. By pressing the reset pressing member of the present utility model, the reset pressing member exerts pressure on the elastic chuck, and the elastic chuck will release the restriction on the clamping plate, so that the open-type high-frequency current sensor and the lower clamping block are separated, thereby achieving the purpose of quick disassembly. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a front-side structural schematic diagram of the present utility model;

[0016] Figure 2 Schematic diagram of the internal structure of the positioning bin of the present utility model;

[0017] Figure 3 Schematic diagram of the elastic chuck structure of the present utility model;

[0018] Figure 4 Schematic diagram of the pressing plate and the clamping plate of the present utility model;

[0019] Figure 5 Schematic diagram of the pressure-bearing member of the present utility model.

[0020] In the figure:

[0021] 1. Open-type high-frequency current sensor; 11. Hinge member; 12. Lower clamping block; 2. Reset pressing member; 21. First chute; 22. Fixed limit block; 4. Pressing plate; 41. Finger pressing plate; 101. Positioning bin; 5. Clamping plate; 51. Cutout block; 52. Through groove; 6. Pressure-bearing member; 61. Second groove; 62. Second chute; 7. Fixed track; 8. Second spring; 9. Elastic chuck; 91. Chuck; 92. Pressing plate; 921. First groove; 10. First spring. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 drawings,

[0024] An embodiment of the present application discloses an on-line partial discharge monitoring device for cables, including an open-type high-frequency current sensor 1. One end of the open-type high-frequency current sensor 1 is fixedly connected to a hinge member 11. The end of the rotating shaft of the hinge member 11 is fixedly connected to one end of a lower clamping block 12. The other end of the lower clamping block 12 is fixedly connected to a positioning bin 101. One side of the inner wall of the positioning bin 101 is fixedly connected to a reset pressing member 2. A resilient chuck 9 is arranged below the reset pressing member 2. One end of the resilient chuck 9 is fixedly connected to one end of a first spring 10. The other end of the first spring 10 is fixedly connected to the bottom of the positioning bin 101. The other end of the resilient chuck 9 is clamped with a clamping plate 5. The end of the clamping plate 5 is fixedly connected to a pressing plate 4. The end of the pressing plate 4 is fixedly connected to the other end of the open-type high-frequency current sensor 1. A finger pressing plate 41 is fixedly connected to the plate body of the pressing plate 4. A bearing member 6 is arranged below the clamping plate 5. The middle of the bearing member 6 is fixedly connected to one end of a second spring 8. The other end of the second spring 8 is fixedly connected to the bottom of the positioning bin 101. The side of the bearing member 6 is slidably connected to a fixed track 7. The end of the fixed track 7 is fixedly connected to the inner wall of the positioning bin 101;

[0025] The reset pressing member 2 includes: a first chute 21 and a fixed limiting block 22. A first chute 21 is formed in the middle of the reset pressing member 2. The first chute 21 is slidably connected to one end of the fixed limiting block 22. The other end of the fixed limiting block 22 is fixedly connected to the inner wall of the positioning bin 101;

[0026] The clamping plate 5 includes: a cut block 51 and a through groove 52. The end of the clamping plate 5 is fixedly connected to the end of the cut block 51. A through groove 52 is formed in the block body of the clamping plate 5;

[0027] The bearing member 6 includes: a second groove 61 and a second chute 62. A second chute 62 is formed in the side of the bearing member 6. The second chute 62 is slidably connected to the end of the fixed track 7. A second groove 61 is formed in the middle of the bearing member 6. The inner wall of the second groove 61 is fixedly connected to the end of the second spring 8;

[0028] The resilient chuck 9 includes: a chuck 91 and a pressing plate 92. The end of the rotating shaft of the resilient chuck 9 is fixedly connected to the inside of the positioning bin 101. One end of the resilient chuck 9 is fixedly connected to the end of the chuck 91. The other end of the resilient chuck 9 is fixedly connected to the end of the pressing plate 92;

[0029] A first groove 921 is formed in the lower part of the pressing plate 92. The inner wall of the first groove 921 is fixedly connected to the end of the first spring 10.

[0030] Working principle: After the open-type high-frequency current sensor 1 is inserted into the cable, hold the bottom of the positioning chamber 101 with one hand, and then press the finger pressure plate 41 with the thumb. At this time, the finger pressure plate 41 drives the clamping plate 5 to be inserted into the positioning chamber 101 through the pressing plate 4. In this process, the cutout block 51 will push open the clamping head 91, so that the clamping head 91 drives the elastic clamping head 9 to rotate, so that the cutout block 51 continues to move downward. After the cutout block 51 moves to a certain position, the clamping head 91 will be clamped into the through groove 52. At this time, the compressed spring 2 8 provides an upward force to the groove 2 61, so that the pressure-bearing member 6 presses against the end of the cutout block 51, so that the clamping can be maintained. The plate 5 is stably clamped in the position of the clamping head 91. At this time, the clamping of the open-type high-frequency current sensor 1 and the lower clamping block 12 is completed. The installation is completed. When it needs to be disassembled later, it is necessary to press the upper part of the reset pressure piece 2 so that the reset pressure piece 2 slides under the restriction of the fixed limit block 22. The end of the reset pressure piece 2 applies pressure to the pressure plate 92, so that the elastic clamping head 9 rotates, and the clamping head 91 will move out of the through groove 52. In this way, the restriction of the elastic clamping head 9 on the clamping plate 5 is cancelled, and then the spring 2 8 drives the pressure-bearing piece 6 to push the clamping plate 5 upward, so that the open-type high-frequency current sensor 1 is separated from the lower clamping block 12 to complete the disassembly.

[0031] Through the cutout design of the contact part between the cutout block 51 and the clamping head 91, the cutout block 51 can smoothly push the clamping head 91 open during the downward movement, and then the clamping head 91 is clamped in the through groove 52, thereby completing the fixation of the open-type high-frequency current sensor 1 and the lower clamping block 12. This fixing method is simple. When the positioning bin 101 and the pressing plate 4 are in the installation dead angle, there is no need to observe them deliberately with the eyes, and the fixation of the two can be completed by relying on the feeling of the hand; by pressing the reset pressure piece 2, the reset pressure piece 2 applies pressure to the elastic clamping head 9, and the elastic clamping head 9 will be free from the restriction of the clamping plate 5, so that the open-type high-frequency current sensor 1 and the lower clamping block 12 are completely separated, thereby achieving the purpose of quick disassembly.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An online monitoring device for partial discharge of a cable, comprising an open-type high-frequency current sensor (1), characterized in that: One end of the open-type high-frequency current sensor (1) is fixedly connected to a hinge (11), the end of the rotating shaft of the hinge (11) is fixedly connected to one end of a lower clamping block (12), the other end of the lower clamping block (12) is fixedly connected to a positioning bin (101), one side of the inner wall of the positioning bin (101) is fixedly connected to a reset pressure piece (2), the lower part of the reset pressure piece (2) is provided with an elastic clamp (9), one end of the elastic clamp (9) is fixedly connected to one end of a spring (10), the other end of the spring (10) is fixedly connected to the bottom of the positioning bin (101), and the other end of the elastic clamp (9) is clamped with a clamp A connecting plate (5), the end of the connecting plate (5) is fixedly connected to a pressing plate (4), the end of the pressing plate (4) is fixedly connected to the other end of the open-type high-frequency current sensor (1), the plate body of the pressing plate (4) is fixedly connected to a finger pressure plate (41), a pressure-bearing member (6) is arranged at the lower part of the connecting plate (5), the middle part of the pressure-bearing member (6) is fixedly connected to one end of a second spring (8), the other end of the second spring (8) is fixedly connected to the bottom of a positioning chamber (101), the side of the pressure-bearing member (6) is slidably connected to a fixed track (7), the end of the fixed track (7) is fixedly connected to the inner wall of the positioning chamber (101).

2. The cable partial discharge online monitoring device according to claim 1, characterized in that: The reset pressure piece (2) comprises: a slide groove (21) and a fixed limit block (22); a slide groove (21) is provided in the middle of the reset pressure piece (2); the slide groove (21) is slidably connected to one end of the fixed limit block (22); and the other end of the fixed limit block (22) is fixedly connected to the inner wall of the positioning bin (101).

3. The cable partial discharge online monitoring device according to claim 1, characterized in that: The clamping plate (5) comprises: a cutout block (51) and a through groove (52); the end of the clamping plate (5) is fixedly connected to the end of the cutout block (51); and the block body of the clamping plate (5) is provided with a through groove (52).

4. The cable partial discharge online monitoring device according to claim 1, characterized in that: The pressure-bearing member (6) comprises: a second groove (61) and a second slide groove (62). The side of the pressure-bearing member (6) is provided with a second slide groove (62), and the second slide groove (62) is slidably connected to the end of the fixed rail (7). The middle of the pressure-bearing member (6) is provided with a second groove (61), and the inner wall of the second groove (61) is fixedly connected to the end of the second spring (8).

5. The cable partial discharge online monitoring device according to claim 1, characterized in that: The elastic clamp (9) comprises: a clamp (91) and a pressure plate (92); the end of the rotating shaft of the elastic clamp (9) is fixedly connected to the interior of the positioning bin (101); one end of the elastic clamp (9) is fixedly connected to the end of the clamp (91); and the other end of the elastic clamp (9) is fixedly connected to the end of the pressure plate (92).

6. The cable partial discharge online monitoring device according to claim 5, characterized in that: A groove one (921) is provided at the lower portion of the pressure plate (92), and the inner wall of the groove one (921) is fixedly connected to the end of the spring one (10).

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