CN112305269B - Lightning arrester live-line test secondary sampling crocodile clip - Google Patents

Lightning arrester live-line test secondary sampling crocodile clip Download PDF

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Publication number
CN112305269B
CN112305269B CN202011105369.0A CN202011105369A CN112305269B CN 112305269 B CN112305269 B CN 112305269B CN 202011105369 A CN202011105369 A CN 202011105369A CN 112305269 B CN112305269 B CN 112305269B
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China
Prior art keywords
clamp
lightning arrester
live
line test
clamp body
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Application number
CN202011105369.0A
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Chinese (zh)
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CN112305269A (en
Inventor
杨屹洲
陈达壮
林志锋
蔡宗斌
李建英
洪艳君
刘杰
傅迎舒
林淑娟
汤杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Xiamen Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Xiamen Power Supply Co of State Grid Fujian Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Fujian Electric Power Co Ltd, Xiamen Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202011105369.0A priority Critical patent/CN112305269B/en
Publication of CN112305269A publication Critical patent/CN112305269A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/04Housings; Supporting members; Arrangements of terminals
    • G01R1/0408Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0425Test clips, e.g. for IC's

Abstract

The invention relates to a secondary sampling crocodile clip for an electrified test of a lightning arrester, and belongs to the technical field of detection equipment. Including main clamp and vice clamp, main clamp rotates with vice clamp to be connected, and main clamp vice clamp junction is provided with the torsional spring, and the torsional spring provides elasticity and makes main clamp vice clamp front end press from both sides tightly, vice clamp end is equipped with the connector, main clamp including the clamp body with articulate the chuck of clamp body front end, the clamp body rotates with vice clamp to be connected, set up locking device between chuck and the clamp body, be provided with the probe device on the vice clamp. The invention solves the problems of infirm fixation and the like of the sampling crocodile clip in the prior art.

Description

Lightning arrester live-line test secondary sampling crocodile clip
Technical Field
The invention relates to a secondary sampling crocodile clip for an electrified test of a lightning arrester, and belongs to the technical field of detection equipment.
Background
The electrified test of zinc oxide arrester can be under the condition that need not to have a power failure, through the measurement to resistive component in the leakage current of arrester valve block, judge the ageing and the condition of weing of arrester valve block, generally take a sample through opening screw hole etc. when the secondary voltage to the zinc oxide arrester is taken a sample, the sample connection position is darker and narrow and small, adopt traditional alligator clip to operate, metal part contact failure, cause the reading signal unstable, the data fluctuation is big, alligator clip pops out easily when simultaneously fixed insecure, need suspend the experiment, carry out secondary wiring again, and there is short circuit potential safety hazard, carry out secondary wiring repeatedly, the success rate of taking a sample is low, cause secondary voltage sample time overlength.
A prior art patent document CN201710880724.3 discloses a voltage signal receiving device for testing the resistive current of a lightning arrester and a using method thereof, wherein the receiving clamp is in the shape of an alligator clamp and comprises a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are mutually and rotatably connected; the head of the main clamp extends outwards to be provided with 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 sampling crocodile clip in the reference example and the prior art has the problems of poor fixation and the like, so the invention provides a secondary sampling crocodile clip for the live test of an arrester, which is used for solving the problems.
Disclosure of Invention
In order to overcome the defects of insecure fixation and the like of the existing sampling alligator clip, the invention designs the secondary sampling alligator clip for the live test of the lightning arrester.
In order to achieve the purpose, the invention adopts the following technical scheme:
a secondary sampling crocodile clip for an electrified lightning arrester test comprises a main clip and an auxiliary clip, wherein the main clip is rotatably connected with the auxiliary clip, a torsion spring (not shown) is arranged at the joint of the main clip and the auxiliary clip, the torsion spring provides elasticity to enable the front end of the main clip and the auxiliary clip to be clamped tightly, a connector is arranged at the tail end of the auxiliary clip, the main clip comprises a clip body and a clip head hinged at the front end of the clip body, the clip body is rotatably connected with the auxiliary clip, and a locking device is arranged between the clip head and the clip body; the locking device comprises inclined teeth, a clamping block and a connecting rod, the end face of the chuck close to one end of the clamp body is arc-shaped, a plurality of inclined teeth are arranged on the periphery of the arc-shaped end face, the clamping block is arranged on the clamp body, one end of the clamping block is rotatably connected with the clamp body, the other end of the clamping block can be inserted into and supports against the inclined teeth, a limiting block is further arranged on the clamp body, one end of the connecting rod penetrates through the clamp body to be fixedly connected with the clamping block, the other end of the connecting rod is provided with a top plate, and the top plate is connected with the clamp body through a first spring; the limiting block and the connecting rod are respectively positioned on two sides of the clamping block; be provided with the probe device on the auxiliary clamp, the probe device includes measuring bar, direction jar and second spring, the direction jar sets up on the auxiliary clamp and both ends are airtight, measuring bar one end is followed direction jar axial and is passed the direction jar both ends and worn out from the auxiliary clamp front end, and the measuring bar other end passes through the wire and is connected with the connector, measuring bar is located and is equipped with the link ring on the pole body in the direction jar, the link ring is close to with the direction jar through second spring coupling between the medial surface of connector one side.
And a contact head is arranged at the end part of one side of the detection rod, which is far away from the connector.
The top of the main clamp is positioned outside the connecting rod and is provided with a boss, and the top surface of the boss is lower than the bottom surface of the top plate and is parallel to the bottom surface of the top plate.
The detection rod is a copper rod.
The diameter of the contact head is not smaller than that of the detection rod.
The auxiliary clamp is made of conductive metal.
The auxiliary clamp is communicated with the connector.
The two ends of the first spring are respectively connected with the bottom surface of the top plate and the top surface of the boss.
The number of the first springs is at least two.
Compared with the prior art, the invention has the following characteristics and beneficial effects: according to the crocodile clip, the angle of the clip head can be adjusted through the locking device, so that the clip head is parallel to the outer wall of the hollow screw hole, and the crocodile clip can be better clamped and fixed; the auxiliary clamp is provided with the probe device, when the auxiliary clamp extends into the idle screw hole, the detection rod of the probe device can prop against the idle screw, and the spring in the guide cylinder plays a pre-tightening role, so that the detection result is more stable; the auxiliary clamp and the detection rod are both communicated with the connector, the requirements of different holes can be met, and meanwhile, the test data is more stable.
Drawings
FIG. 1 is a full sectional view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with the present invention;
fig. 3 is a partially enlarged view of B in fig. 1 according to the present invention.
Wherein the reference numerals are: 1. hollowing a screw hole; 10. a main clamp; 20. a secondary clip; 11. a chuck; 12. a clip body; 13. a boss; 21. a probe device; 211. a detection lever; 212. a guide cylinder; 213. a second spring; 214. a retainer ring; 215. a wire; 216. a contact head; 22. a connector; 30. a locking device; 31. helical teeth; 32. a clamping block; 33. a limiting block; 34. a connecting rod; 35. a top plate; 36. a first spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1-2, the secondary sampling alligator clip for the live test of the arrester of the embodiment includes a main clip 10 and an auxiliary clip 20, the main clip 10 is rotatably connected to the auxiliary clip 20, a connector 22 is disposed at a tail end of the auxiliary clip 20, the main clip 10 includes a clip body 12 and a clip head 11 hinged to a front end of the clip body 12, the clip body 12 is rotatably connected to the auxiliary clip 20, and a locking device 30 is disposed between the clip head 11 and the clip body 12; the locking device 30 comprises oblique teeth 31, a clamping block 32 and a connecting rod 34, the end face of the chuck 11 close to one end of the clamp body 12 is arc-shaped, a plurality of oblique teeth 31 are arranged on the periphery of the arc-shaped end face, the clamping block 32 is arranged on the clamp body 12, one end of the clamping block 32 is rotatably connected with the clamp body 12, the other end of the clamping block 32 can be inserted into and support against the oblique teeth 31, a limiting block 33 is further arranged on the clamp body 12, one end of the connecting rod 34 penetrates through the clamp body 12 and is fixedly connected with the clamping block 32, the other end of the connecting rod 34 is provided with a top plate 35, and the top plate 35 is connected with the clamp body 12 through a first spring 36; the limiting block 33 and the connecting rod 34 are respectively positioned at two sides of the clamping block 32; further, the sub-clip 20 is made of conductive metal, and the sub-clip 20 is electrically connected to the connector 22; further, a boss 13 is arranged at the top of the main clamp 10 and positioned outside the connecting rod 34, and the top surface of the boss 13 is lower than the bottom surface of the top plate 35 and is parallel to the bottom surface of the top plate 35; furthermore, two ends of the first spring 36 are respectively connected to the bottom surface of the top plate 35 and the top surface of the boss 13, and the number of the first springs 36 is at least two.
Referring to fig. 3, a probe device 21 is disposed on the auxiliary clamp 20, the probe device 21 includes a detection rod 211, a guide cylinder 212 and a second spring 213, the guide cylinder 212 is disposed on the auxiliary clamp 20, and both ends of the guide cylinder 212 are sealed, one end of the detection rod 211 axially passes through both ends of the guide cylinder 212 along the guide cylinder 212 and passes through the front end of the auxiliary clamp 20, a contact head 216 is disposed at an end of the detection rod 211 on a side away from the connection head 22, a diameter of the contact head 216 is not smaller than that of the detection rod 211, the other end of the detection rod 211 is connected to the connection head 22 through a wire 215, a stopper ring 214 is disposed on a rod body of the detection rod 211 in the guide cylinder 212, and the stopper ring 214 is connected to an end face of the guide cylinder 212 on an inner side close to the connection head 22 through the second spring 213; further, the detection rod 211 is a copper rod.
Example 1:
the method comprises the steps that a clamp body 12 of a main clamp 10 is pressed by hand, an alligator clamp is opened, then the head of an auxiliary clamp 20 extends into an empty screw hole 1, after a contact head 216 at the head of a detection rod 211 on the auxiliary clamp 20 abuts against a detected screw, the head of the auxiliary clamp 20 continues to extend into the auxiliary clamp so that a spring has pretightening force, then a clamp 11 rotates anticlockwise, inclined teeth 31 on the clamp 11 rotate along with the clamp 11, the inclined teeth 31 push away a clamping block 32 when rotating, the clamping block 32 drives a connecting rod 34 to push upwards, a first spring 36 is pulled away by the pushing upwards of the connecting rod 34, after the inclined teeth 31 pass through, the clamping block 32 returns under the action of a first spring 36 to continuously abut against the next inclined tooth 31, when the inclined teeth 31 rotate to a preset angle, the inclined teeth 31 are inclined downwards, the clamping block 32 is clamped by the limiting block 32, the clamping block 32 is clamped by the limiting block 33, the clamp 11 cannot rotate anticlockwise, at the clamp body 12 is loosened, the alligator clamp bites the empty screw hole 1, and the outer wall of the empty screw hole 1, and a test can be started;
after the test is finished, the clamp body 12 of the main clamp 10 is pressed by hand, the auxiliary clamp 20 is taken out from the hollow screw hole 1, the top plate 35 is pulled by hand, the clamping block 32 does not clamp the helical teeth 31 any more, then the clamping head 11 is returned, and the main clamp 10 and the auxiliary clamp 20 are returned.
Example 2:
if the depth of the idle screw hole 1 is shallow, the head of the auxiliary clamp 20 extends into the idle screw hole 1, the head of the auxiliary clamp 20 and a contact head 216 at the head of the detection rod 211 abut against a detected screw, then the locking device 30 is adjusted, the alligator clamp bites the outer wall of the idle screw hole 1, the test is started, as the contact head 216 and the auxiliary clamp 20 are both in contact with the detected screw, and the contact head 216 and the auxiliary clamp 20 are both communicated with the connector 22, more stable data can be measured, after the test is completed, the main clamp 10 and the auxiliary clamp 20 are taken out, the clamp 11 is reset, and the main clamp 10 and the auxiliary clamp 20 are reset.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides an arrester live test secondary sample crocodile presss from both sides which characterized in that: the clamp comprises a main clamp (10) and an auxiliary clamp (20), wherein the main clamp (10) is rotatably connected with the auxiliary clamp (20), a connector (22) is arranged at the tail end of the auxiliary clamp (20), the main clamp (10) comprises a clamp body (12) and a chuck (11) hinged to the front end of the clamp body (12), the clamp body (12) is rotatably connected with the auxiliary clamp (20), and a locking device (30) is arranged between the chuck (11) and the clamp body (12);
the locking device (30) comprises inclined teeth (31), a clamping block (32) and a connecting rod (34), the end face of the chuck (11) close to one end of the clamp body (12) is arc-shaped, a plurality of inclined teeth (31) are arranged on the periphery of the arc-shaped end face, the clamping block (32) is arranged on the clamp body (12), one end of the clamping block (32) is rotatably connected with the clamp body (12), the other end of the clamping block can be inserted into and props against the inclined teeth (31), a limiting block (33) is further arranged on the clamp body (12), one end of the connecting rod (34) penetrates through the clamp body (12) and is fixedly connected with the clamping block (32), a top plate (35) is arranged at the other end of the connecting rod (34), and the top plate (35) is connected with the clamp body (12) through a first spring (36); the limiting block (33) and the connecting rod (34) are respectively positioned at two sides of the clamping block (32);
be provided with probe device (21) on vice clamp (20), probe device (21) are including detecting pole (211), guide cylinder (212) and second spring (213), guide cylinder (212) set up on vice clamp (20) and both ends are airtight, detect pole (211) one end along guide cylinder (212) axial pass guide cylinder (212) both ends and wear out from vice clamp (20) front end, detect pole (211) other end and pass through wire (215) and be connected with connector (22), it is equipped with shelves ring (214) on the pole body that detecting pole (211) is located guide cylinder (212), shelves ring (214) and guide cylinder (212) are close to connect through second spring (213) between the medial surface of connector (22) one side.
2. The lightning arrester live-line test secondary sampling alligator clip according to claim 1, characterized in that: the end part of one side of the detection rod (211) far away from the connector (22) is provided with a contact head (216).
3. The lightning arrester live-line test secondary sampling alligator clip according to claim 1, characterized in that: the top of the main clamp (10) is positioned outside the connecting rod (34) and is provided with a boss (13), and the top surface of the boss (13) is lower than the bottom surface of the top plate (35) and is parallel to the bottom surface of the top plate (35).
4. The live-line test secondary sampling alligator clip of the lightning arrester of claim 1, characterized in that: the detection rod (211) is a copper rod.
5. The live-line test secondary sampling alligator clip of the lightning arrester of claim 2, characterized in that: the diameter of the contact head (216) is not smaller than that of the detection rod (211).
6. The lightning arrester live-line test secondary sampling alligator clip according to claim 1, characterized in that: the auxiliary clamp (20) is made of conductive metal.
7. The live-line test secondary sampling alligator clip for the lightning arrester as claimed in claim 6, wherein: the auxiliary clamp (20) is communicated with the connector (22).
8. The live-line test secondary sampling alligator clip for the lightning arrester as claimed in claim 3, wherein: two ends of the first spring (36) are respectively connected with the bottom surface of the top plate (35) and the top surface of the boss (13).
9. The lightning arrester live-line test secondary sampling alligator clip according to claim 8, characterized in that: the number of the first springs (36) is at least two.
CN202011105369.0A 2020-10-15 2020-10-15 Lightning arrester live-line test secondary sampling crocodile clip Active CN112305269B (en)

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CN202011105369.0A CN112305269B (en) 2020-10-15 2020-10-15 Lightning arrester live-line test secondary sampling crocodile clip

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Application Number Priority Date Filing Date Title
CN202011105369.0A CN112305269B (en) 2020-10-15 2020-10-15 Lightning arrester live-line test secondary sampling crocodile clip

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CN112305269B true CN112305269B (en) 2022-10-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2598170Y (en) * 2003-01-23 2004-01-07 浙江永锦电力器材有限公司 Portable short circuit grounding wire for transforming
CN107703335A (en) * 2017-09-26 2018-02-16 国网福建省电力有限公司 Voltage signal for testing current in resistance property of lightning arrester accesses folder and its application method
CN208207012U (en) * 2018-04-26 2018-12-07 广东电网有限责任公司 A kind of Special-purpose test tool for electrified lightning arrester
CN209264827U (en) * 2018-12-08 2019-08-16 山东天科防雷工程有限公司 A kind of digital grounding resistance tester
CN211300168U (en) * 2019-07-30 2020-08-21 华融科创生物科技(天津)有限公司 Vascular clamp with adjustable it is simple and easy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2598170Y (en) * 2003-01-23 2004-01-07 浙江永锦电力器材有限公司 Portable short circuit grounding wire for transforming
CN107703335A (en) * 2017-09-26 2018-02-16 国网福建省电力有限公司 Voltage signal for testing current in resistance property of lightning arrester accesses folder and its application method
CN208207012U (en) * 2018-04-26 2018-12-07 广东电网有限责任公司 A kind of Special-purpose test tool for electrified lightning arrester
CN209264827U (en) * 2018-12-08 2019-08-16 山东天科防雷工程有限公司 A kind of digital grounding resistance tester
CN211300168U (en) * 2019-07-30 2020-08-21 华融科创生物科技(天津)有限公司 Vascular clamp with adjustable it is simple and easy

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