CN107703335B - Voltage signal access clamp for lightning arrester resistive current test and use method thereof - Google Patents
Voltage signal access clamp for lightning arrester resistive current test and use method thereof Download PDFInfo
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- CN107703335B CN107703335B CN201710880724.3A CN201710880724A CN107703335B CN 107703335 B CN107703335 B CN 107703335B CN 201710880724 A CN201710880724 A CN 201710880724A CN 107703335 B CN107703335 B CN 107703335B
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- screwdriver head
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- voltage signal
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 11
- 241000270722 Crocodylidae Species 0.000 claims abstract description 10
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 claims abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 7
- 241000270728 Alligator Species 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention relates to a voltage signal receiving device for testing the resistive current of a lightning arrester and a using method thereof, wherein a receiving clamp is in a crocodile clamp shape and comprises a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are mutually connected in a rotating way; the head of the main clamp extends outwards to form a cross screwdriver head, the tail end of the cross screwdriver head is connected with a spiral spring in an abutting mode, and the spiral spring is movably embedded in the main clamp; a plurality of crocodile teeth are arranged on the inner side of the end part of the auxiliary clamp along the length direction; the tail parts of the main clamp and the auxiliary clamp are respectively sleeved with an insulating sleeve; the tail of the main clamp is also inwards provided with a connecting hole for connecting an electric power test wire, and the connecting hole and the cross screwdriver head can be electrically communicated. The invention has the beneficial effects that: the device can be firmly fixed at the lower end of the to-be-tested air switch, and meanwhile, the conductive part of the device can be fully contacted with the conductive part at the lower end of the to-be-tested air switch, so that the voltage can be reliably obtained.
Description
Technical Field
The invention relates to a voltage signal access device for testing the resistive current of a lightning arrester.
Background
The lightning arrester resistive current test is a test item which is regularly carried out on the lightning arrester by operation and inspection personnel of a transformer substation, and a lightning arrester resistive current tester is required to be used for completing the test. In the instrument test process, a voltage quantity is needed as a reference signal, and a voltage signal is usually connected from the lower end of a measurement air switch in a terminal box of the voltage transformer.
When the test connection for receiving the voltage is connected to the measurement air switch, the measurement air switch is not disconnected or the connection at the lower end of the air switch is not removed, otherwise, the measurement loop loses power. Therefore, at present, the voltage signal is generally accessed by directly clamping the alligator clip on the lower conductive part of the measurement cavity by using a test lead with the alligator clip. However, due to the structure of the alligator clip, the alligator clip cannot be in full contact with the empty conducting part for measurement, and the situation of poor contact between the alligator clip and the empty conducting part for measurement often occurs, so that the situation that the voltage cannot be obtained in the use process of the arrester resistive current tester, and the test is interrupted is caused.
Disclosure of Invention
The invention aims to overcome the defects and provides a voltage signal access device for testing the resistive current of the lightning arrester, so that reliable voltage signal acquisition is realized.
The technical scheme adopted by the invention for solving the technical problems is as follows: a voltage signal receiving clamp for testing the resistive current of a lightning arrester is in a crocodile clamp shape and comprises a main clamp and an auxiliary clamp, wherein the main clamp and the auxiliary clamp are mutually and rotatably connected; the head of the main clamp extends outwards to form a cross screwdriver head, the tail end of the cross screwdriver head is connected with a spiral spring in an abutting mode, and the spiral spring is movably embedded in the main clamp; a plurality of crocodile teeth are arranged on the inner side of the end part of the auxiliary clamp along the length direction; the tail parts of the main clamp and the auxiliary clamp are respectively sleeved with an insulating sleeve; the tail of the main clamp is also inwards provided with a connecting hole for connecting an electric power test wire, and the connecting hole and the cross screwdriver head can be electrically communicated.
Furthermore, the main clamp and the auxiliary clamp are mutually connected through a rotating shaft in a rotating mode, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected with the main clamp and the auxiliary clamp.
Furthermore, the connecting hole is connected with one end of the electric power test wire, and the other end of the electric power test wire is connected with a voltage acquisition device.
Furthermore, the cross screwdriver head extends into the conductive bolt at the lower end of the air switch to be tested and is in contact with the conductive bolt.
The invention also provides a use method of the voltage signal access clamp for testing the resistive current of the lightning arrester, and a worker holds the insulating sleeves of the main clamp and the auxiliary clamp by hand to control the opening and closing of the main clamp and the auxiliary clamp; when the voltage signal is received, one end of the power test wire is inserted into the connecting hole and contacts with the connecting hole, and the other end of the power test wire is connected with a voltage acquisition device of the arrester resistive current tester; then, the cross screwdriver head extends into a conductive bolt at the lower end of the to-be-tested air switch to be in contact with the conductive bolt, at the moment, the cross screwdriver head contracts inwards, the spiral spring is pressed tightly, and the crocodile teeth at the end part of the auxiliary clamp bite the lower end of the to-be-tested air switch, so that the receiving clamp is fixed at the lower end of the to-be-tested air switch; after the spiral spring is pressed, a reverse acting force acts on the cross screwdriver head, and the cross screwdriver head presses the conductive bolt, so that the cross screwdriver head is fully contacted with the conductive bolt; the voltage of the to-be-tested air switch is conducted to the connecting hole from the lower end conductive bolt through the cross screwdriver head and is input to the voltage acquisition device through the power test line, and voltage signals are acquired.
Compared with the prior art, the invention has the following beneficial effects: the receiving clamp provided by the invention is used for collecting voltage signals of the to-be-measured air switch, ensures the reliability in the receiving process, can be firmly fixed at the lower end of the to-be-measured air switch, and can also ensure that the conductive part of the to-be-measured air switch is fully contacted with the conductive part at the lower end of the to-be-measured air switch, thereby reliably obtaining the voltage quantity.
Drawings
The invention is further described with reference to the following figures.
Fig. 1 is a schematic structural diagram of an access clip according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a use process of the access clip according to an embodiment of the present invention.
In the figure: 1-main clamp; 2-auxiliary clamp; 3-cross screwdriver head; 4-a coil spring; 5-crocodile teeth; 6-an insulating sleeve; 7-connecting hole; 8-power test line; 9-air switch to be tested; 90-conductive bolt; 10-a rotating shaft.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-2, the voltage signal receiving clamp for the resistive current test of the lightning arrester of the embodiment is in an alligator clamp shape, and comprises a main clamp 1 and an auxiliary clamp 2, wherein the main clamp 1 and the auxiliary clamp 2 are mutually and rotatably connected; the head of the main clamp 1 extends outwards to form a cross bolt cutter head 3, the tail end of the cross bolt cutter head 3 is abutted with a spiral spring 4, and the spiral spring 4 is movably embedded in the main clamp 1; a plurality of crocodile teeth 5 are arranged on the inner side of the end part of the auxiliary clamp 2 along the length direction; the tail parts of the main clamp 1 and the auxiliary clamp 2 are respectively sleeved with an insulating sleeve 6; the tail of the main clamp 1 is also inwards provided with a connecting hole 6 for connecting an electric power test wire 8, and the connecting hole 6 and the cross bolt tool bit 3 can be electrically communicated.
As can be seen from the above, the present invention has the following advantageous effects: the cross bolt tool bit 3 and the helical spring 4 at the position of the main clamp 1 are matched to compress the conductive bolt 90 at the lower end of the air switch 9 to be tested, and the conductive bolt 90 is in full contact with the conductive bolt, so that the voltage can be reliably obtained. The cross bolt cutter head 3 is electrically conducted with the connecting hole 7, so that voltage signals are transmitted to the voltage acquisition device through the power test line 8. And a fixing seat which is contacted with the connecting hole 7 and is used for fixing the electric power test wire 8 is arranged in the connecting hole 7.
In this embodiment, the main clamp 1 and the auxiliary clamp 2 are rotatably connected to each other via a rotating shaft 10, a torsion spring is sleeved on the rotating shaft 10, and two ends of the torsion spring are respectively connected to the main clamp 1 and the auxiliary clamp 2. The main clamp 1 and the auxiliary clamp 2 are ensured to reset after being opened through the torsion spring, and the main clamp 1 and the auxiliary clamp 2 are mutually clamped and fixed on the air switch 9 to be tested.
In this embodiment, the connection hole 7 is connected to one end of the power test line 8, and the other end of the power test line is connected to a voltage collecting device.
In this embodiment, the cross bolt cutter head 3 extends into the conductive bolt 90 at the lower end of the to-be-tested hollow 9, and contacts with the conductive bolt 90.
The invention also provides a use method of the voltage signal access clamp for testing the resistive current of the lightning arrester, wherein a worker holds the insulating sleeves 6 of the main clamp 1 and the auxiliary clamp 2 by hand to control the opening and closing of the main clamp 1 and the auxiliary clamp 2; when a voltage signal is received, one end of a power test wire 8 is inserted into the connecting hole 7 and contacts with the connecting hole 7, and the other end of the power test wire is connected with a voltage acquisition device of the arrester resistive current tester; then, the cross bolt cutter head 3 extends into a conductive bolt 90 at the lower end of the to-be-tested air switch 9 to be in contact with the conductive bolt 90, at the moment, the cross bolt cutter head 3 contracts inwards, the spiral spring 4 is pressed, and the crocodile teeth 5 at the end part of the auxiliary clamp 2 bite the lower end of the to-be-tested air switch 9, so that the receiving clamp is fixed at the lower end of the to-be-tested air switch 9; after the spiral spring 4 is pressed, a reverse acting force acts on the cross bolt cutter head 3, and the cross bolt cutter head 3 presses the conductive bolt 90, so that the cross bolt cutter head 3 is fully contacted with the conductive bolt 90; the voltage of the air switch 9 to be tested is conducted to the connecting hole 7 from the lower end conductive bolt 90 through the cross bolt tool bit 3 and is input to the voltage acquisition device through the electric power test line 8, and the acquisition of a voltage signal is completed.
In summary, the voltage signal access clamp for the resistive current test of the lightning arrester and the use method thereof provided by the invention have the advantages of simple structure, convenience in operation and capability of reliably acquiring the voltage signal.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a voltage signal access presss from both sides for arrester resistive current test which characterized in that: the receiving clamp is in a crocodile clamp shape and comprises a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are mutually connected in a rotating way; the head of the main clamp extends outwards to form a cross screwdriver head, the tail end of the cross screwdriver head is connected with a spiral spring in an abutting mode, and the spiral spring is movably embedded in the main clamp; a plurality of crocodile teeth are arranged on the inner side of the end part of the auxiliary clamp along the length direction; the tail parts of the main clamp and the auxiliary clamp are respectively sleeved with an insulating sleeve; the tail of the main clamp is also inwards provided with a connecting hole for connecting an electric power test wire, and the connecting hole and the cross screwdriver head can be electrically communicated.
2. The voltage signal access clamp for the resistive current test of the lightning arrester as claimed in claim 1, wherein: the main clamp and the auxiliary clamp are mutually connected through a rotating shaft in a rotating mode, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected with the main clamp and the auxiliary clamp.
3. The voltage signal access clamp for the resistive current test of the lightning arrester as claimed in claim 1, wherein: the connecting hole is connected with one end of the electric power test wire, and the other end of the electric power test wire is connected with a voltage acquisition device.
4. The voltage signal access clamp for the resistive current test of the lightning arrester as claimed in claim 1, wherein: the cross screwdriver head extends into the conductive bolt at the lower end of the to-be-tested air switch and is in contact with the conductive bolt.
5. The use method of the voltage signal access clamp for the resistive current test of the lightning arrester according to any one of claims 1 to 4 is characterized in that:
the worker holds the insulating sleeves of the main clamp and the auxiliary clamp by hand to control the opening and closing of the main clamp and the auxiliary clamp; when the voltage signal is received, one end of the power test wire is inserted into the connecting hole and contacts with the connecting hole, and the other end of the power test wire is connected with a voltage acquisition device of the arrester resistive current tester; then, the cross screwdriver head extends into a conductive bolt at the lower end of the to-be-tested air switch to be in contact with the conductive bolt, at the moment, the cross screwdriver head contracts inwards, the spiral spring is pressed tightly, and the crocodile teeth at the end part of the auxiliary clamp bite the lower end of the to-be-tested air switch, so that the receiving clamp is fixed at the lower end of the to-be-tested air switch; after the spiral spring is pressed, a reverse acting force acts on the cross screwdriver head, and the cross screwdriver head presses the conductive bolt, so that the cross screwdriver head is fully contacted with the conductive bolt; the voltage of the to-be-tested air switch is conducted to the connecting hole from the lower end conductive bolt through the cross screwdriver head and is input to the voltage acquisition device through the power test line, and voltage signals are acquired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880724.3A CN107703335B (en) | 2017-09-26 | 2017-09-26 | Voltage signal access clamp for lightning arrester resistive current test and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880724.3A CN107703335B (en) | 2017-09-26 | 2017-09-26 | Voltage signal access clamp for lightning arrester resistive current test and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107703335A CN107703335A (en) | 2018-02-16 |
| CN107703335B true CN107703335B (en) | 2020-07-10 |
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| CN201710880724.3A Active CN107703335B (en) | 2017-09-26 | 2017-09-26 | Voltage signal access clamp for lightning arrester resistive current test and use method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397291B (en) * | 2019-08-16 | 2022-08-23 | 国网江苏省电力有限公司南京供电分公司 | Transformer low-voltage bushing drainage wire clamp |
| CN112305269B (en) * | 2020-10-15 | 2022-10-28 | 国网福建省电力有限公司 | Lightning arrester live-line test secondary sampling crocodile clip |
| CN112415234B (en) * | 2020-11-12 | 2023-04-11 | 贵州电网有限责任公司 | GIS test clamp |
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| CN102645561A (en) * | 2012-04-19 | 2012-08-22 | 辽宁省电力有限公司铁岭供电公司 | Wiring clip for electric test of lightning arrester |
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| US7385382B2 (en) * | 2006-11-14 | 2008-06-10 | Randell Lee Wilferd | Quick reference test light probe with digital voltage meter |
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