CN215768653U

CN215768653U - Clamp for high-current test of arrester resistor disc

Info

Publication number: CN215768653U
Application number: CN202120550467.9U
Authority: CN
Inventors: 刘洋; 李璞; 谷勇; 陈腾; 李磊; 王庆芬
Original assignee: Shijiazhuang Institute of Railway Technology
Current assignee: Shijiazhuang Institute of Railway Technology
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2022-02-08
Anticipated expiration: 2031-03-17

Abstract

The utility model relates to a clamp for a high-current test of a lightning arrester resistor disc, which comprises an upper insulating plate and a lower insulating plate, wherein the upper insulating plate and the lower insulating plate are detachably connected through an insulating rod; the center of the upper insulating plate is provided with an opening, a central positioning frame is fixed above the upper insulating plate, the center of the central positioning frame is sleeved with a puller bolt, the lower end of the puller bolt is connected with the top of an upper copper electrode, and the side surface of the upper copper electrode is provided with a test connecting bolt; and a lower copper electrode is fixed above the center of the lower insulating plate through a bolt, and a grounding bolt is arranged on the side surface of the lower copper electrode. The puller bolt can be screwed downwards at the central locating rack, and the upper copper electrode is driven to jack the resistance card on the lower copper electrode downwards simultaneously, so that the effect of clamping the resistance card to be tested is realized, sparks generated by the resistance card during a large-current test can be prevented, the problem that the resistance card cannot be tested correctly and the test result cannot reflect the actual quality of the resistance card is avoided.

Description

Clamp for high-current test of arrester resistor disc

Technical Field

The utility model belongs to the technical field of lightning arrester tests, and particularly relates to a clamp for a high-current test of a lightning arrester resistor disc.

Background

The lightning arrester is an important protective electric appliance for preventing electric transmission and transformation equipment of an electric power system from being damaged by atmospheric overvoltage, the nonlinear resistor disc is a core element of the lightning arrester, the quality of the nonlinear resistor disc directly influences the performance of the lightning arrester, therefore, before the lightning arrester is put into use, a large-current test needs to be carried out on the nonlinear resistor disc so as to avoid the problem that the resistor disc is out of factory in quality, damaged in the transportation process or degraded in use to influence the electrical performance of the resistor disc, and the quality of the resistor disc is a key for judging whether the lightning arrester can exert the protective effect on the electric transmission and transformation equipment. In the prior art, when a 4/10 mu s large current test is carried out on the lightning arrester resistance card, the resistance card is placed on a copper electrode, another copper electrode is placed at the upper end of the resistance card, and then the resistance card is subjected to a detection test by means of a large current generated by an impulse current generator. However, because the weight of the copper electrode above the resistor is too small, when a large current of 100kA 4/10 μ s passes through the resistor, a gap is generated between the resistor and the copper electrode above the resistor due to the strong electromotive force generated by the large current, and the gap generates sparks under the condition of high voltage and large current and causes a flashover phenomenon of the current on the side surface of the resistor, so that the test result in the case cannot reflect the real quality level of the resistor, and the resistor can be damaged.

Therefore, a fixture for a high-current test of the lightning arrester resistor disc is needed to be provided for solving the problems that in the test process of the resistor disc, the resistor disc cannot be correctly tested and the real quality of the resistor disc cannot be reflected because the resistor disc cannot be clamped to generate sparks.

SUMMERY OF THE UTILITY MODEL

The fixture for the high-current test of the lightning arrester resistor disc is used for solving the problems that in the test process of the resistor disc, the resistor disc cannot be clamped tightly to generate sparks, so that the resistor disc cannot be tested correctly and the real quality of the resistor disc cannot be reflected.

The technical scheme adopted by the utility model is as follows: a clamp for a high-current test of a lightning arrester resistor disc is characterized by comprising an upper insulating plate and a lower insulating plate, wherein the upper insulating plate and the lower insulating plate are detachably connected through an insulating rod; the center of the upper insulating plate is provided with an opening, a central positioning frame is fixed above the upper insulating plate, the center of the central positioning frame is sleeved with a puller bolt, the lower end of the puller bolt is connected with the top of an upper copper electrode, and the side surface of the upper copper electrode is provided with a test connecting bolt; and a lower copper electrode is fixed above the center of the lower insulating plate through a bolt, and a grounding bolt is arranged on the side surface of the lower copper electrode.

Furthermore, holes are formed in the periphery of the upper insulating plate and the periphery of the lower insulating plate, external threads are formed in the end portions of two ends of the insulating rod, and the end portion of the insulating rod penetrates through the hole of the upper insulating plate or the hole of the lower insulating plate and clamps and fixes the upper insulating plate or the lower insulating plate through two bolts.

Furthermore, the central positioning frame is fixedly connected with the upper insulating plate through a bolt, a hole is formed in the center of the central positioning frame, an internal thread is arranged in the hole, and the central positioning frame is in threaded connection with the tightening bolt.

Further, a cylindrical pit is arranged at the top of the upper copper electrode, two combined connecting plates are arranged above the pit and fixedly connected with the top of the upper copper electrode through bolts, a groove is formed in the end part below the tightening bolt, two semicircular notches are formed in the inner sides of the combined connecting plates, round holes formed after combination are clamped in the groove of the tightening bolt, and when the tightening bolt is screwed downwards in the central positioning frame, the groove of the tightening bolt rotates in the round hole of the combined connecting plate and compresses the upper copper electrode through compressing the combined connecting plate.

Furthermore, the side face of the upper copper electrode is provided with an opening, an internal thread is arranged in the opening, and the test connecting bolt is sleeved with a gasket and screwed into the opening in the side face of the upper copper electrode through the thread.

Furthermore, the side surface of the lower copper electrode is provided with an opening, an internal thread is arranged in the opening, and the grounding bolt is sleeved with a gasket and screwed into the opening on the side surface of the lower copper electrode through the thread.

Further, a resistor disc is arranged between the upper copper electrode and the lower copper electrode, and resistor gaskets for supporting the resistor disc are arranged among the upper copper electrode, the lower copper electrode and the resistor disc.

The utility model has the following beneficial effects:

1. go up through insulator spindle and bolt fixed connection between insulation board and the lower insulation board, play the effect of the insulating frame of whole anchor clamps, insulating material can reduce the danger that operating personnel electrocuted. And a lower copper electrode is fixed on the lower insulating plate through a bolt and used for placing a resistance card, and the bolt on the side surface of the lower copper electrode is used for screwing the grounding wire. Go up to be fixed with the center location frame on the insulation board for with the tight bolted connection in top, the tight bolt in top can screw down at the center location frame, drives the resistance card that copper electrode pushed down tightly down on the copper electrode simultaneously, realizes the tight effect of clamp to the resistance card that awaits measuring, can prevent that the resistance card from producing the spark when heavy current is experimental, has avoided can't correctly experimenting the resistance card, the unable problem that reflects the actual quality of resistance card of test result.

2. Go up the insulation board and have the trompil down around the insulation board, the insulator spindle end has the external screw thread, and every end of insulator spindle uses two nuts to press from both sides upper and lower insulation board tight fixed, convenient dismantlement and maintenance, and insulation system prevents to electrocute.

3. Go up insulation board central authorities and pass through the bolt fastening and have central locating rack, central locating rack central authorities trompil and have the internal thread, convenient and puller bolt threaded connection, also make puller bolt can screw downwards or upwards screw out as required.

4. Go up copper electrode top surface and open and have cylindrical pit, can hold the below tip of tight bolt in top, the pit top has two combination connection boards of opening jaggedly through the bolt fastening, make up into the middle connecting plate that is the round hole after two combination connection boards splice, middle round hole can block in the recess of tight bolt lower tip in top, its recess can be rotatory in the round hole of combination connection board when making the tight bolt in top rotatory, and can not withstand the last copper electrode and drive the last copper electrode and rotate together when rotatory, influence the tight effect in top of going up copper electrode to the resistance card. When the puller bolt is screwed downwards, the combined connecting plate is finally pulled tightly, the combined connecting plate drives the upper copper electrode to pull the resistance card to be tested tightly, and gaps and sparks can be prevented from being generated when the resistance card is tested.

5. Go up copper electrode side trompil, there is the internal thread in the hole for twist experimental connecting bolt, experimental electric shock current generator's current end flexible conductor twines on experimental connecting bolt and screws up with the bolt, more conveniently connects and dismantles experimental cable. The bolt is sleeved with a gasket, so that the test cable joint can be compressed and the contact area can be increased.

6. The side face of the lower copper electrode is provided with a hole, an internal thread is arranged in the hole and used for screwing in the grounding bolt, and the grounding end flexible conductor of the impact current generator for the test is wound on the grounding bolt and screwed down by the bolt, so that the grounding cable is more convenient to connect and detach. The bolt is sleeved with a gasket, so that the grounding cable joint can be compressed and the contact area can be increased.

7. Go up copper electrode and lower copper electrode and press from both sides tight resistance card when experimental, go up copper electrode, all be equipped with the resistance gasket down between copper electrode and the resistance card, can play the effect of supporting and route between upper and lower copper electrode and resistance card to can replace not unidimensional resistance gasket according to the size of different resistance cards, so that play better support and the tight effect in top to the resistance card.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged structural view of the combination connecting plate at a in fig. 1.

In the figure: 1. a lower insulating plate; 2. an insulating rod; 3. an upper insulating plate; 4. a lower copper electrode; 5. a ground bolt; 6. jacking the bolt; 7. a copper electrode is arranged; 8. a central positioning frame; 9. combining the connecting plates; 10. testing the connecting bolt; 11. resistance cards; 12. a resistive shim.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, the present invention provides a technical solution: the utility model provides a lightning arrester resistance card anchor clamps for heavy current test, its characterized in that includes upper insulation board 3 and lower insulation board 1, all open porosely around upper insulation board 3 or lower insulation board 1, every the trompil of upper insulation board 3 is passed to the upper end of insulator spindle 2, every the lower tip of insulator spindle 2 passes the trompil of lower insulation board 1, the both ends tip of insulator spindle 2 all has the external screw thread, the tip of insulator spindle 2 penetrates the trompil of upper insulation board 3 or lower insulation board 1 and presss from both sides upper insulation board 3 or lower insulation board 1 through two bolts and tightly fixes, the frame that upper insulation board 3, lower insulation board 1 and insulator spindle 2 are constituteed is insulating material, can prevent that operating personnel from electrocuteeing. The upper insulating plate 3 and the lower insulating plate 1 are detachably connected through the insulating rod 2 by using bolts, so that the upper insulating plate and the lower insulating plate are more convenient to detach, and when any one part is damaged, the replacement and maintenance of parts are more convenient. Go up 3 central authorities of insulation board and have the trompil and the top is fixed with central locating rack 8, central locating rack 8 passes through bolt fixed connection with last insulation board 3, 8 central authorities of central locating rack trompil and downthehole internal thread that has, central locating rack 8 and 6 threaded connection of puller bolt make things convenient for puller bolt 6 to screw downwards or upwards screw out. Go up copper electrode 7 top and be equipped with cylindrical pit, the pit top is equipped with two built-up connection board 9, two built-up connection board 9 all passes through bolt fixed connection with last copper electrode 7 top, the tip below of puller bolt 6 is equipped with the recess, two built-up connection board 9 inboard all has semi-circular breach and the round hole card that forms after the combination in the recess of puller bolt 6, its recess is rotatory in built-up connection board 9's round hole and compresses tightly copper electrode 7 through compressing tightly built-up connection board 9 when puller bolt 6 screws downwards in central locating rack 8. Therefore, the puller bolt 6 rotates in the round hole of the combined connecting plate 9 instead of pushing against the upper copper electrode 3 to drive the upper copper electrode 3 to rotate together when rotating, and the puller effect on the resistance card 11 is influenced.

The side surface of the upper copper electrode 7 is provided with an opening, an internal thread is arranged in the opening, and the test connecting bolt 10 is sleeved with a gasket and screwed into the opening on the side surface of the upper copper electrode 7 through the thread. The side surface of the lower copper electrode 4 is provided with an opening, an internal thread is arranged in the opening, and the grounding bolt 5 is sleeved with a gasket and screwed into the opening on the side surface of the lower copper electrode 4 through the thread. The test connecting bolt 10 and the grounding bolt 5 are respectively used for connecting a current end and a grounding end of the impulse current generator, so that the resistance card 11 is connected into the impulse current generator and forms a test loop. The bolt connection is adopted to facilitate the disassembly and connection of the test cable, and meanwhile, the gasket is added on the bolt to further compress the test cable joint and increase the contact area. The upper copper electrode 7 and the lower copper electrode 4 clamp the resistance card 11 during testing, resistance gaskets 12 are arranged among the upper copper electrode 7, the lower copper electrode 4 and the resistance card 11, the resistance gaskets 12 are made of metal materials, the supporting and passage effects can be achieved among the upper copper electrode, the lower copper electrode and the resistance card 11, and the resistance gaskets 12 of different sizes can be replaced according to the sizes of the different resistance cards 11, so that the resistance card 11 can be better supported and tightly pushed.

In one embodiment, when the lightning arrester resistor disc large current test is carried out by using the utility model, a resistor pad 12 matched with the resistor disc 11 to be tested in size is firstly placed at the central position of the lower copper electrode 4, the resistor disc 11 to be tested is placed on the resistor pad 12, and then another resistor pad 12 is placed above the resistor disc 12, so that the upper resistor pad, the lower resistor pad, the resistor disc 11 and the upper copper electrode and the lower copper electrode are vertically aligned. The hexagonal bolt head of the puller bolt 6 is screwed by a spanner, so that the puller bolt 6 is screwed downwards, the groove at the lower end of the puller bolt 6 rotates in the central circular hole formed by the combination of the combination connecting plates 9 and cannot prop against the upper copper electrode 7 to drive the upper copper electrode 7 to rotate, and the puller bolt 6 drives the combination connecting plates 9 and the upper copper electrode 7 to vertically move downwards and tightly prop against the upper and lower resistance gaskets 12 and the resistance discs together with the lower copper electrode 4. And pressing a cable joint at the grounding end of the impact current generator below a gasket 5 of the grounding bolt of the lower copper electrode 4 and screwing the grounding bolt 5, and pressing a test cable joint of the impact current generator below a gasket 10 of the test connecting bolt of the upper copper electrode 7 and screwing the test connecting bolt 10. And (3) checking that the resistance card 11 is compacted, after the grounding end cable and the test cable are firmly connected, performing a high-current test on the resistance card 11, after the resistance card 11 is tested and the resistance card 11 and the clamp are subjected to safe discharge, loosening the puller bolt 6 by using a wrench, taking out the tested resistance card 11 and putting the resistance card 11 to be tested next.

The lightning arrester resistance card 11 can be conveniently and quickly tested by repeating the steps, the problem that the copper electrode and the resistance card 11 cannot be clamped tightly to generate sparks when the resistance card 11 is tested can be effectively solved by using the clamp, and the true quality of the resistance card 11 can be accurately reflected by a test result.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the embodiments and/or portions thereof may be made, and all changes, equivalents, and modifications which fall within the spirit and scope of the utility model are therefore intended to be embraced by the appended claims.

Claims

1. The clamp for the high-current test of the arrester resistor disc is characterized by comprising an upper insulating plate (3) and a lower insulating plate (1), wherein the upper insulating plate (3) and the lower insulating plate (1) are detachably connected through an insulating rod (2); the center of the upper insulating plate (3) is provided with an opening, a center positioning frame (8) is fixed above the opening, a puller bolt (6) is sleeved at the center of the center positioning frame (8), the lower end of the puller bolt (6) is connected with the top of an upper copper electrode (7), and a test connecting bolt (10) is arranged on the side surface of the upper copper electrode (7); a lower copper electrode (4) is fixed above the center of the lower insulating plate (1) through a bolt, and a grounding bolt (5) is arranged on the side surface of the lower copper electrode (4).

2. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: the insulation structure is characterized in that holes are formed in the periphery of the upper insulation plate (3) or the periphery of the lower insulation plate (1), external threads are formed in the end portions of two ends of the insulation rod (2), the end portion of the insulation rod (2) penetrates through the holes of the upper insulation plate (3) or the lower insulation plate (1), and the upper insulation plate (3) or the lower insulation plate (1) is clamped and fixed through two bolts.

3. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: the central positioning frame (8) is fixedly connected with the upper insulating plate (3) through a bolt, an internal thread is arranged in a hole formed in the center of the central positioning frame (8) and the hole, and the central positioning frame (8) is in threaded connection with the puller bolt (6).

4. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: go up copper electrode (7) top and be equipped with cylindrical pit, the pit top is equipped with two built-up connection board (9), two built-up connection board (9) all pass through bolt fixed connection with last copper electrode (7) top, puller bolt (6) below tip is equipped with the recess, two built-up connection board (9) inboard all has semi-circular breach and makes up the round hole card that the back formed in the recess of puller bolt (6), puller bolt (6) rotate in the round hole of built-up connection board (9) and compress tightly copper electrode (7) through compressing tightly built-up connection board (9) when screwing down in central locating rack (8) its recess.

5. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: the side surface of the upper copper electrode (7) is provided with an opening and an internal thread is arranged in the opening, and the test connecting bolt (10) is sleeved with a gasket and screwed into the opening on the side surface of the upper copper electrode (7) through the thread.

6. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: the side surface of the lower copper electrode (4) is provided with an opening, an internal thread is arranged in the opening, and the grounding bolt (5) is sleeved with a gasket and screwed into the opening on the side surface of the lower copper electrode (4) through the thread.

7. The clamp for the high-current test of the arrester resistor disc according to claim 1, characterized in that: and a resistor disc (11) is arranged between the upper copper electrode (7) and the lower copper electrode (4), and resistor gaskets (12) for supporting the resistor disc (11) are arranged among the upper copper electrode (7), the lower copper electrode (4) and the resistor disc (11).