CN213986633U

CN213986633U - High-precision direct-current resistance tester

Info

Publication number: CN213986633U
Application number: CN202022688087.XU
Authority: CN
Inventors: 韩绍盈
Original assignee: Nanjing Guangdun Electric Co ltd
Current assignee: Nanjing Guangdun Electric Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-08-17
Anticipated expiration: 2030-11-19

Abstract

The utility model relates to the technical field of measuring instruments, and discloses a high-precision direct current resistance tester, which comprises a shell, wherein the shell is of a rectangular hollow structure, side holes are formed in the positions of two sides of one side of the shell, the side holes are circular through holes, a connecting pipe is fixedly installed on the inner circular wall surface of each side hole, the connecting pipe is of a circular pipe-shaped structure, a bottom block is formed on one side of the outer circular wall surface of the connecting pipe, the bottom block is of a half-circular pipe structure, side grooves are formed in the two sides of the top surface of the bottom block, electric wires needing to be tested are placed in the bottom block through workers, the bolts are twisted by the workers, one end of each bolt moves downwards through threads, one end of each bolt enters an internal extrusion moving plate of each extrusion groove, the moving plate moves downwards, the extrusion pipes are driven to move downwards while the moving plate moves, the extrusion pipes extrude electric wires to fix the electric wires, and the bottom block is electrically connected with a resistance testing device, the resistance testing device is convenient to test the resistance of the electric wire.

Description

High-precision direct-current resistance tester

Technical Field

The utility model relates to a measuring instrument technical field specifically is a high accuracy direct current resistance tester.

Background

In switching equipment such as a high-voltage switch and a load switch, the size of the loop resistor directly influences the performance of a product, the contact condition of a switch contact can be reflected through the size of the loop resistor, and the heating temperature during the operation of the product is directly reflected. When various switch devices are subjected to factory inspection, installation, maintenance and overhaul by a switch manufacturer, a power generation and supply unit, an electric power construction installation company and the like, loop resistance must be tested, and the test method is an important performance index.

According to the requirements of the preventive test regulation DL/T596-1996 of the power equipment, the conducting loop resistance of various switch equipment is tested, and the test current of the conducting loop resistance is not less than 100A. Since the contact resistance is increased due to oxidation of the contact surface, poor contact fastening, and the like, and when a large current flows, the temperature of the contact point is increased, which further accelerates the oxidation of the contact surface, further increases the contact resistance, and serious accidents are continuously caused, it is necessary to measure the contact resistance frequently or periodically.

In the resistance test, a voltage wire is connected to a tested object by utilizing a wire clamp, the operation is improper when the wire clamp is oxidized or connected, a virtual connection phenomenon is generated between the wire clamp and the tested object, so that the existence of contact resistance is caused, the contact resistance can generate larger influence on the test precision, the manual work cannot be distinguished when the influence is many, and finally the test result has errors.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model is not enough to prior art, the utility model provides a high accuracy direct current resistance tester, possess the fastening line end, advantage such as dustproof, resistance test has been solved in the test, the voltage wire utilizes the line pincers clamp to receive on the article to be tested, because the line pincers clamp is improper when oxidation or connection, the line pincers with by producing virtual phenomenon of connecing between the article to be tested, lead to contact resistance's existence, this contact resistance can produce great influence to measuring accuracy, and this kind of influence is artifical unable the differentiation when the test when many, finally lead to the problem that the test result has the error.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a high-precision direct current resistance tester comprises a shell, wherein the shell is of a rectangular hollow structure, side holes are formed in the positions of two sides of one side of the shell, the side holes are circular through holes, a connecting pipe is fixedly mounted on the inner circular wall surface of each side hole, the connecting pipe is of a circular pipe-shaped structure, a bottom block is arranged on one side of the outer circular wall surface of the connecting pipe, the bottom block is of a semi-circular pipe structure, side grooves are formed in the two sides of the top surface of the bottom block, the side grooves are circular grooves, a moving plate is arranged on the top surface of the bottom block and is of a rectangular structure, an extrusion pipe is fixedly mounted on the bottom surface of the moving plate, the extrusion pipe is a semi-circular pipe, limiting columns are fixedly mounted on the two sides of the bottom surface of the moving plate, the limiting columns are of a cylindrical structure and correspond to the positions of the side grooves, the limiting columns are movably clamped with the side grooves, extrusion grooves are formed in the top surface of the moving plate, the extrusion grooves are circular grooves, springs are fixedly mounted on the two sides of the top surface of the bottom block, the spring is not being repeated here for current structure, and the top of spring is in the same place with the bottom surface fixed mounting of movable plate, and the screw has all been seted up to the top surface both sides of shell, and the screw is circular through-hole, and the screw has been seted up to the interior round wall face of screw, and the internal thread of screw has the bolt, and the bolt is not being repeated here for current structure, and the bolt extends to the inside of shell through the screw and the movable joint in the extrusion groove of seting up on the movable plate is in the same place.

Preferably, the apical pore has been seted up to the top surface of shell, and the apical pore is the rectangle through-hole, and the inside fixed mounting of apical pore has the display, and the display does not do the perplexing here for current structure, and the top surface fixed mounting of shell has dustproof frame, and dustproof frame is the rectangle frame structure.

Preferably, the inside one side fixed mounting of dustproof frame has the rotation post, rotates the post and is cylindrical structure, and the inside of dustproof frame is provided with the rotor plate, and the rotor plate is the structure that a rectangle and a semicircle piece constitute, and the rotation hole has been seted up to the one end of rotor plate one side, rotates the hole and is circular through-hole, and it is corresponding with the position of rotating the post to rotate the hole, rotates the hole and rotates the post and cup joint together.

Preferably, the draw-in groove has all been seted up to the top surface both sides of dustproof frame, and the draw-in groove is the U-shaped groove, and the inside fixed mounting of draw-in groove has the extrusion piece, and the extrusion piece is the rubber system structure of U-shaped, and the equal fixed mounting in both sides of rotor plate has the card post, and the card post is cylindrical structure, and the card post is together fixed with the extrusion piece extrusion.

Preferably, the limit groove has been seted up to one side of dustproof frame, and the limit groove is the rectangular channel, and one side fixed mounting of rotor plate has the limit piece, and the limit piece is the rectangle structure, and the limit piece is in the same place with limit groove activity joint, and the one end fixed mounting of end piece has resistance testing arrangement, and resistance testing arrangement does not do the redundancy here for prior art.

(III) advantageous effects

Compared with the prior art, the utility model provides a high accuracy direct current resistance tester possesses following beneficial effect:

1. this high accuracy direct current resistance tester places the inside of bottom block again through the electric wire that the staff will need measuring resistance, back staff wrench movement bolt, the screw thread lapse is passed through to the one end of bolt, the one end of bolt gets into the inside extrusion movable plate in extrusion groove this moment, the movable plate lapse, drive extrusion pipe lapse when the movable plate removes, extrusion pipe extrusion electric wire is fixed it, the bottom block is in the same place with resistance testing arrangement electric connection, the resistance testing arrangement of being convenient for carries out test resistance to the electric wire.

2. This high accuracy direct current resistance tester, after having tested the resistance through the staff, reverse wrench movement bolt, the bolt is no longer extrudeed the movable plate, and the movable plate resets by the effort of spring rebound this moment, can take out the electric wire that has tested, the rotatory rotor plate in back for the limit piece is in the same place with the limit groove joint, the card post is in the same place with the extrusion piece joint, and the position of fixed rotor plate avoids external dust to get into the inside of display, reaches dirt-proof effect.

Drawings

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

FIG. 2 is a schematic view of the three-dimensional splitting structure of the present invention;

FIG. 3 is a schematic view of the structure of the dustproof frame of the present invention;

FIG. 4 is a schematic view of the structure of the housing of the present invention;

fig. 5 is a schematic view of the bottom block structure of the present invention.

In the figure: 1. a housing; 2. a top hole; 3. a display; 4. a dust-proof frame; 5. rotating the column; 6. a rotating plate; 7. rotating the hole; 8. a card slot; 9. extruding the block; 10. clamping the column; 11. a side groove; 12. an edge block; 13. a side hole; 14. a connecting pipe; 15. a bottom block; 16. a side groove; 17. moving the plate; 18. extruding the tube; 19. a limiting column; 20. extruding a groove; 21. a spring; 22. a resistance testing device; 23. a screw hole; 24. and (4) bolts.

Detailed Description

The technical solutions in the embodiments 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 some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a high-precision dc resistance tester comprises a housing 1, wherein the housing 1 is a rectangular hollow structure, side holes 13 are respectively formed at two sides of one side of the housing 1, the side holes 13 are circular through holes, a connecting pipe 14 is fixedly installed on the inner circular wall of each side hole 13, the connecting pipe 14 is a circular pipe-shaped structure, a bottom block 15 is arranged at one side of the outer circular wall of the connecting pipe 14, the bottom block 15 is a semicircular pipe structure, side grooves 16 are respectively formed at two sides of the top surface of the bottom block 15, each side groove 16 is a circular groove, a movable plate 17 is arranged on the top surface of the bottom block 15, the movable plate 17 is a rectangular structure, an extrusion pipe 18 is fixedly installed on the bottom surface of the movable plate 17, the extrusion pipe 18 is a semicircular pipe, limiting posts 19 are fixedly installed on two sides of the bottom surface of the movable plate 17, the limiting posts 19 are cylindrical structures, the positions of the limiting posts 19 correspond to the positions of the side grooves 16, the limiting posts 19 are movably clamped with the side grooves 16, extrusion groove 20 has been seted up to the top surface of movable plate 17, extrusion groove 20 is circular groove, equal fixed mounting has spring 21 in the top surface both sides of bottom block 15, spring 21 does not do the repeated description here for current structure, the top of spring 21 is in the same place with movable plate 17's bottom surface fixed mounting, screw 23 has all been seted up to the top surface both sides of shell 1, screw 23 is circular through-hole, the screw has been seted up to the interior round wall surface of screw 23, the internal thread of screw 23 is connected with bolt 24, bolt 24 does not do not describe here for current structure repeatedly, bolt 24 extends to the inside of shell 1 through screw 23 and is in the same place in the movable joint of extrusion groove 20 that the movable joint was seted up on movable plate 17.

Further, in above-mentioned scheme, apical pore 2 has been seted up to the top surface of shell 1, and apical pore 2 is the rectangle through-hole, and the inside fixed mounting of apical pore 2 has display 3, and display 3 does not do here for current structure and gives unnecessary details, and the top surface fixed mounting of shell 1 has dustproof frame 4, and dustproof frame 4 is the rectangle frame structure, can surround display 3 through installation dustproof frame 4, conveniently provides the space for follow-up installation shield.

Further, in the above-mentioned scheme, the inside one side fixed mounting of dustproof frame 4 has rotation post 5, rotation post 5 is cylindrical structure, the inside of dustproof frame 4 is provided with rotor plate 6, rotor plate 6 is the structure that a rectangle and a semicircle piece constitute, rotation hole 7 has been seted up to the one end of rotor plate 6 one side, rotation hole 7 is circular through-hole, rotation hole 7 is corresponding with the position of rotation post 5, rotation hole 7 rotates with rotation post 5 and cup joints together, through setting up rotor plate 6, the staff stirs rotor plate 6, rotor plate 6 can rotate the outside of post 5 again through the rotation hole 7 of seting up, can watch the content that shows on the display 3.

Further, in above-mentioned scheme, draw-in groove 8 has all been seted up to the top surface both sides of dustproof frame 4, draw-in groove 8 is the U-shaped groove, the inside fixed mounting of draw-in groove 8 has extrusion piece 9, extrusion piece 9 is the rubber system structure of U-shaped, the equal fixed mounting in both sides of rotor plate 6 has card post 10, card post 10 is cylindrical structure, card post 10 extrudees fixedly together with extrusion piece 9, will block the inside of post 10 joint income extrusion piece 9 when rotating rotor plate 6, card post 10 extrudees extrusion piece 9 and produces frictional force, can fix the position of rotor plate 6.

Further, in above-mentioned scheme, limit groove 11 has been seted up to one side of dustproof frame 4, and limit groove 11 is the rectangular channel, and one side fixed mounting of rotor plate 6 has limit piece 12, and limit piece 12 is the rectangle structure, and limit piece 12 is in the same place with 11 movable joint in limit groove, and the one end fixed mounting of end piece 15 has resistance testing arrangement 22, and resistance testing arrangement 22 does not do the perplexing here for prior art, through seting up limit groove 11 and setting up limit piece 12, has made things convenient for the staff to stir limit piece 12 and has rotated rotor plate 6.

When the wire resistance testing device is used, the wire needing to measure the resistance is placed in the bottom block 15 through the staff, the bolt 24 is twisted by the staff, one end of the bolt 24 moves downwards through the threads, at the moment, one end of the bolt 24 enters the inside extrusion moving plate 17 of the extrusion groove 20, the moving plate 17 moves downwards, the extrusion pipe 18 is driven to move downwards while the moving plate 17 moves, the extrusion pipe 18 extrudes the wire to fix the wire, the bottom block 15 is electrically connected with the resistance testing device 22, and the resistance testing device 22 is convenient to test the resistance of the wire.

After having tested the resistance through the staff, reverse wrench movement bolt 24, bolt 24 no longer extrudees movable plate 17, and movable plate 17 receives the effort of spring 21 rebound to reset this moment, can take out the electric wire that has tested, back rotatory rotor plate 6 for limit piece 12 and limit groove 11 joint together, card post 10 and extrusion piece 9 joint together, the position of fixed rotor plate 6 avoids external dust to get into the inside of display 3, reaches dirt-proof effect.

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

1. The utility model provides a high accuracy direct current resistance tester, includes shell (1), its characterized in that: side opening (13) have all been seted up to the both sides position of shell (1) one side, interior round wall fixed mounting of side opening (13) has connecting pipe (14), bottom block (15) have been seted up to excircle wall one side of connecting pipe (14), side channel (16) have all been seted up to the top surface both sides of bottom block (15), the top surface of bottom block (15) is provided with movable plate (17), the bottom surface fixed mounting of movable plate (17) has extrusion pipe (18), the equal fixed mounting in bottom surface both sides of movable plate (17) has spacing post (19), extrusion groove (20) have been seted up to the top surface of movable plate (17), the equal fixed mounting in top surface both sides of bottom block (15) has spring (21), screw (23) have all been seted up to the top surface both sides of shell (1), the internal thread connection of.

2. A high accuracy dc resistance tester as claimed in claim 1 wherein: the position of the limiting column (19) corresponds to that of the side groove (16), the limiting column (19) is movably clamped with the side groove (16), the top end of the spring (21) is fixedly installed with the bottom surface of the moving plate (17), and the bolt (24) extends into the shell (1) through the screw hole (23) and is movably clamped with the extrusion groove (20) formed in the moving plate (17).

3. A high accuracy dc resistance tester as claimed in claim 1 wherein: top hole (2) have been seted up to the top surface of shell (1), and the inside fixed mounting of top hole (2) has display (3), and the top surface fixed mounting of shell (1) has dustproof frame (4).

4. A high accuracy dc resistance tester as claimed in claim 3 wherein: the dustproof frame is characterized in that a rotating column (5) is fixedly mounted on one side of the interior of the dustproof frame (4), a rotating plate (6) is arranged inside the dustproof frame (4), a rotating hole (7) is formed in one end of one side of the rotating plate (6), the rotating hole (7) corresponds to the position of the rotating column (5), and the rotating hole (7) is rotatably sleeved with the rotating column (5).

5. A high accuracy dc resistance tester as claimed in claim 3 wherein: draw-in groove (8) have all been seted up to the top surface both sides of dustproof frame (4), and draw-in groove (8) are the U-shaped groove, and the inside fixed mounting of draw-in groove (8) has extrusion block (9), and the equal fixed mounting in both sides of rotor plate (6) has card post (10), and card post (10) are together fixed with extrusion block (9) extrusion.

6. A high accuracy dc resistance tester as claimed in claim 3 wherein: side groove (11) have been seted up to one side of dustproof frame (4), and one side fixed mounting of rotor plate (6) has limit piece (12), and limit piece (12) and limit groove (11) activity joint are in the same place, and the one end fixed mounting of end piece (15) has resistance testing arrangement (22).