Auxiliary clamp for testing full-loop resistance of tubular bus disconnecting link
By designing an auxiliary fixture for testing the full loop resistance of the tube-type busbar blade switch, the problem of the inability to accurately measure the busbar blade switch circuit resistance in the prior art is solved, accurate testing and defect removal are achieved, and equipment operation status and power supply reliability are improved.
Patent Information
- Application Number
- CN202411494221.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-03-07
AI Technical Summary
The wiring clamp of the existing system circuit resistance tester cannot be directly connected to the tube busbar, resulting in the circuit resistance of the busbar knife switch and static contacts cannot be accurately measured, affecting the healthy operation of the equipment and the reliability of power supply.
An auxiliary fixture is designed, including an operating rod, an ultrasonic tester, an auxiliary jaw of an open and closing structure and a test assembly. The remote operation is achieved through the operating rod, and the top block and push rod tightener structure realize the opening and closing of the auxiliary jaw, driving the opening and closing of the test components, and directly connected to the tube busbar for full-loop resistance testing.
It realizes accurate testing of the full circuit resistance of the tube busbar knife switch, accurately detects and eliminates defects, improves the healthy operating status of the equipment, ensures the reliability of power supply, and improves measurement accuracy and accuracy through multiple test units and ultrasonic testers.
Smart Images
Figure CN119574919A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of electric power detection, and in particular relates to an auxiliary fixture for testing the full-loop resistance of a tube bus switch. Background Art
[0002] The tubular busbar disconnector, namely the busbar switch, is one of the important primary equipment in the substation. The 220kV busbar switch is mainly vertically telescopic, and the static contact is installed on the tubular busbar; the 110kV busbar switch is mainly GW-4 type, and the switch is connected to the tube busbar through the drainage line. The dynamic and static contacts of the busbar switch, and the connection between the switch and the tubular busbar are prone to burning, oxidation, deformation, etc. due to long operation time, resulting in a decrease in the effective contact area between the dynamic and static contacts, and the connection between the switch and the tubular busbar. When the effective contact area decreases, the resistance will increase. However, as the resistance of the wire clamp crimping increases, the heat of the equipment will increase, causing the temperature of the equipment to rise. At the same time, When the metal resistivity increases with the temperature, the temperature at the defect will be further increased. After the bus switch is inspected, the defect is eliminated, and the overhaul work is carried out, the circuit resistance of the switch needs to be tested to confirm whether the defect has been eliminated. However, the current system circuit resistance tester terminal clamp cannot be directly connected to the tubular bus, resulting in the inability to accurately measure the overall circuit resistance of the switch and the static contact, and it is impossible to confirm whether the defect has been eliminated, which endangers the healthy operation of the equipment and affects the reliability of power supply. Therefore, it is very necessary to provide an auxiliary fixture for testing the full circuit resistance of the tubular bus switch, which has a reasonable structure, is easy to use, has good versatility, effectively increases the contact points, doubles the measurement comparison, and improves the measurement accuracy. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an auxiliary fixture for testing the full-loop resistance of a busbar knife switch, which has a reasonable structure, is easy to use, has good versatility, effectively increases contact points, performs double measurement comparison, and improves measurement accuracy.
[0004] The objective of the present invention is achieved in this way: an auxiliary fixture for testing the full-loop resistance of a busbar switch, comprising an operating rod and a test assembly, an ultrasonic tester is arranged in front of the lower part of the operating rod, an auxiliary clamping jaw with an opening and closing structure is arranged at the lower end of the operating rod, a test assembly that moves with the opening and closing of the auxiliary clamping jaw is arranged in front of the auxiliary clamping jaw, the auxiliary clamping jaw is connected to the operating rod through a push rod tightener to realize the opening and closing movement of the test assembly; a hand-held handle is arranged on one side above the operating rod, a display screen is arranged on the other side above the operating rod opposite to the hand-held handle, and a top block for controlling the action of the push rod tightener is arranged on the top of the operating rod.
[0005] The operating rod comprises a hollow insulating rod, a push rod is arranged inside the hollow insulating rod, the upper end of the push rod is connected to the ejection block, and a slider is arranged at the lower end, and the slider is connected to the push rod tightener through a pin shaft.
[0006] A rubber block is arranged at the connection between the upper part of the ejection rod and the hand-held handle, a spring stop washer is arranged above the ejection rod, a spring stop block is arranged below the ejection rod, and a spring is arranged between the spring stop washer and the spring stop block.
[0007] The ultrasonic tester comprises a bottom plate, a main controller is arranged above the bottom plate, the main controller is mounted on the bottom plate by fixing bolts, and a group of ultrasonic sensors is arranged in front of the main controller.
[0008] The auxiliary clamp includes a movable claw and a fixed claw. The movable claw is rotatably installed under the operating rod and a current threading hole is opened inside the movable claw. The free end of the movable claw is connected to the push rod tightener shaft; the fixed claw is fixedly installed at the bottom end of the operating rod and a voltage threading hole is opened inside the fixed claw.
[0009] The test assembly includes a first truss assembly installed on a movable claw and a second truss assembly installed on a fixed claw. The first truss assembly and the second truss assembly are rotatably connected to each other on a side close to the operating rod through a hinged shaft assembly, and an opening is provided on a side away from the operating rod.
[0010] The first truss assembly and the second truss assembly have the same structure, and both include an upper truss and a lower truss. An upper inner truss is arranged on the inner side of the upper truss, and a lower inner truss is arranged on the inner side of the lower truss. The upper truss and the upper inner truss, and the lower truss and the lower inner truss are connected by a plurality of connecting rods arranged at intervals. The upper truss, the lower truss, the upper inner truss, and the lower inner truss are all polygonal structures.
[0011] The test assembly also includes a first test module installed inside the first truss assembly and a second test module installed inside the second truss assembly.
[0012] The first test module and the second test module have the same structure, and both are composed of a plurality of test units, and the plurality of test units are dynamically connected through a spherical transmission universal joint assembly.
[0013] The test unit includes a column installed between an upper truss and a lower truss, a rack slot seat is provided at the lower part of the column, a movable rack is movably connected inside the rack slot seat, the movable rack passes through the rack guide slot seat and a conductive metal hook is provided at the end; a cylindrical gear is meshed above the movable rack, one end of the gear shaft inside the cylindrical gear is the gear shaft input end, and the other end is the gear shaft transmission end.
[0014] The beneficial effects of the present invention are as follows: the present invention is an auxiliary clamp for testing the full-loop resistance of a tubular busbar knife switch. During use, the present invention can realize remote operation through an operating rod, thereby improving operation safety; the opening and closing action of the auxiliary clamp is realized through structures such as a top block and a push rod tightener, thereby facilitating the opening and closing of the test assembly, thereby realizing that the test assembly is directly connected to the tubular busbar, thereby accurately testing the full-loop resistance of the tubular busbar, accurately discovering and eliminating the defects of the tubular busbar knife switch, improving the healthy operation state of the equipment, and ensuring the reliability of power supply; the test assembly of the present invention is composed of a plurality of test units, and corresponding conductive metal hooks for testing are arranged on the test units, thereby ensuring that there is sufficient effective contact area with the tubular busbar, thereby effectively increasing the contact points and improving the measurement accuracy; in addition, the present invention also performs testing through an ultrasonic tester to realize double test comparison, thereby further improving the measurement precision and accuracy; the present invention has the advantages of reasonable structure, easy use, good versatility, effective increase in contact points, double measurement comparison, and improved measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a front view of the present invention.
[0016] Figure 2 For the present invention Figure 1 Schematic diagram of part of the structure.
[0017] Figure 3 For the present invention Figure 2 Stereoscopic diagram.
[0018] Figure 4 For the present invention Figure 3 Schematic diagram of the internal structure.
[0019] Figure 5 It is a schematic diagram of the structure of the ultrasonic tester of the present invention.
[0020] Figure 6 It is an exploded view of the test assembly of the present invention.
[0021] Figure 7 For the present invention Figure 6 Schematic diagram of part of the structure.
[0022] Figure 8 It is a schematic diagram of the structure of the test unit of the test assembly of the present invention.
[0023] In the figure: 1, operating rod 11, hollow insulating rod 12, push rod 13, slider 14, pin 15, spring stop washer 16, spring stopper 17, rubber block 18, spring 2, ultrasonic tester 21, bottom plate 22, main controller 23, fixing bolt 24, ultrasonic sensor 3, auxiliary clamping jaw 31, movable jaw 311, current threading hole 32, fixed jaw 321, voltage threading hole 4, test assembly 41, first truss assembly 42, second truss assembly 401, upper truss 402, lower Truss 403, upper inner truss 404, lower inner truss 405, connecting rod 43, articulated shaft assembly 44, opening 45, first test module 46, second test module 47, test unit 471, column 472, rack slot seat 473, movable rack 474, conductive metal hook 475, cylindrical gear 476, gear shaft input end 477, gear shaft transmission end 48, rack guide slot seat 49, spherical transmission universal joint assembly 5, push rod tightener 6, hand-held handle 7, top block 8, display screen. DETAILED DESCRIPTION
[0024] The present invention will be further described below in conjunction with the accompanying drawings. Example
[0025] like Figure 1-8 As shown, an auxiliary fixture for testing the full-loop resistance of a busbar switch comprises an operating rod 1 and a test assembly 4, an ultrasonic tester 2 is arranged in front of the lower part of the operating rod 1, an auxiliary clamp 3 with an opening and closing structure is arranged at the lower end of the operating rod 1, a test assembly 4 which moves with the auxiliary clamp 3 in opening and closing is arranged in front of the auxiliary clamp 3, the auxiliary clamp 3 is connected to the operating rod 1 through a push rod tightener 5, and is used to drive the test assembly 4 to open and close; a hand-held handle 6 is arranged on one side above the operating rod 1, a display screen 8 is arranged on the other side of the operating rod 1 opposite to the hand-held handle 6, and a top block 7 for controlling the action of the push rod tightener 5 is arranged on the top of the operating rod 1.
[0026] The operating rod 1 includes a hollow insulating rod 11 , a push rod 12 is arranged inside the hollow insulating rod 11 , the upper end of the push rod 12 is connected to the ejector block 7 , and a slider 13 is arranged at the lower end. The slider 13 is connected to the push rod tightener 5 through a pin shaft 14 .
[0027] A rubber block 17 is provided at the connection between the upper part of the ejection rod 12 and the hand-held handle 6 , a spring stop washer 15 is provided above the ejection rod 12 , a spring stopper 16 is provided below the ejection rod 12 , and a spring 18 is provided between the spring stopper washer 15 and the spring stopper 16 .
[0028] The ultrasonic tester 2 comprises a bottom plate 21 , a main controller 22 is arranged above the bottom plate 21 , the main controller 22 is mounted on the bottom plate 21 by fixing bolts 23 , and a group of ultrasonic sensors 24 are arranged in front of the main controller 22 .
[0029] The auxiliary clamping jaw 3 includes a movable jaw 31 and a fixed jaw 32. The movable jaw 31 is rotatably installed under the operating rod 1 and a current threading hole 311 is opened inside the movable jaw 31. The free end of the movable jaw 31 is connected to the axis of the push rod tightener 5; the fixed jaw 32 is fixedly installed at the bottom end of the operating rod 1 and a voltage threading hole 321 is opened inside the fixed jaw 32.
[0030] In this embodiment, the working principle of the operating rod and the auxiliary clamping jaws is as follows: the top block is pressed downward, the top block drives the ejection rod to move downward, and the ejection rod drives the slider to slide downward (the spring is in a compressed state at this time). During the downward movement of the slider, the slider drives the movable claw to rotate around the connection between the movable claw and the operating rod shaft through the push rod tightener, so that the movable claw rotates away from the fixed claw, so that the auxiliary clamping jaw opens, thereby driving the test assembly to open, and then directly connect it to the tubular busbar, and then release the top block, the ejection rod recovers under the action of the spring, and during the upward movement of the slider, the slider drives the movable claw to rotate around the connection between the movable claw and the operating rod shaft through the push rod tightener, so that the movable claw rotates toward the fixed claw, so that the auxiliary clamping jaw closes, thereby driving the test assembly to close, and then the full-loop resistance test of the tubular busbar can be performed through the test assembly.
[0031] The present invention is an auxiliary clamp for testing the full-loop resistance of a tubular busbar switch. During use, the present invention can realize remote operation through an operating rod 1 to improve operation safety; the opening and closing action of the auxiliary clamp 3 is realized through structures such as a top block 7 and a push rod tightener 5, thereby facilitating the opening and closing of a test component 4, thereby realizing that the test component 4 is directly connected to the tubular busbar, thereby accurately testing the full-loop resistance of the tubular busbar, accurately discovering and eliminating defects of the tubular busbar switch, improving the healthy operation state of the equipment, and ensuring the reliability of power supply; the test component 4 of the present invention is composed of a plurality of test units 47, and corresponding conductive metal hooks 474 for testing are arranged on the test units 47, thereby ensuring that there is sufficient effective contact area with the tubular busbar, thereby effectively increasing the contact points and improving the measurement accuracy; in addition, the present invention also performs testing through an ultrasonic tester 2 to realize double test comparison, further improving the measurement accuracy and precision; the present invention has the advantages of reasonable structure, easy use, good versatility, effective increase in contact points, double measurement comparison, and improved measurement accuracy. Example
[0032] like Figure 1-8As shown, an auxiliary fixture for testing the full-loop resistance of a busbar switch comprises an operating rod 1 and a test assembly 4, an ultrasonic tester 2 is arranged in front of the lower part of the operating rod 1, an auxiliary clamp 3 with an opening and closing structure is arranged at the lower end of the operating rod 1, a test assembly 4 which moves with the auxiliary clamp 3 in opening and closing is arranged in front of the auxiliary clamp 3, the auxiliary clamp 3 is connected to the operating rod 1 through a push rod tightener 5, and is used to drive the test assembly 4 to open and close; a hand-held handle 6 is arranged on one side above the operating rod 1, a display screen 8 is arranged on the other side of the operating rod 1 opposite to the hand-held handle 6, and a top block 7 for controlling the action of the push rod tightener 5 is arranged on the top of the operating rod 1.
[0033] The auxiliary clamping jaw 3 includes a movable jaw 31 and a fixed jaw 32. The movable jaw 31 is rotatably installed under the operating rod 1 and a current threading hole 311 is opened inside the movable jaw 31. The free end of the movable jaw 31 is connected to the axis of the push rod tightener 5; the fixed jaw 32 is fixedly installed at the bottom end of the operating rod 1 and a voltage threading hole 321 is opened inside the fixed jaw 32.
[0034] The test assembly 4 includes a first truss assembly 41 installed on the movable claw 31 and a second truss assembly 42 installed on the fixed claw 32. The first truss assembly 41 and the second truss assembly 42 are rotatably connected to the operating rod 1 on one side thereof through a hinge shaft assembly 43, and an opening 44 is provided on the side away from the operating rod 1.
[0035] The first truss assembly 41 and the second truss assembly 42 have the same structure and both include an upper truss 401 and a lower truss 402. An upper inner truss 403 is arranged on the inner side of the upper truss 401, and a lower inner truss 404 is arranged on the inner side of the lower truss 402. The upper truss 401 and the upper inner truss 402, and the lower truss 403 and the lower inner truss 404 are connected by a plurality of connecting rods 405 arranged at intervals. The upper truss 401, the lower truss 402, the upper inner truss 403, and the lower inner truss 404 are all polygonal structures.
[0036] The test assembly 4 further includes a first test module 45 installed inside the first truss assembly 41 and a second test module 46 installed inside the second truss assembly 42 .
[0037] The first test module 45 and the second test module 46 have the same structure and are both composed of a plurality of test units 47. The plurality of test units 47 are dynamically connected via a spherical transmission universal joint assembly 49. A plurality of rack guide slot seats 48 are correspondingly arranged on the inner side of the test unit 47. The rack guide slot seats 48 are installed between the upper inner truss 403 and the lower inner truss 404.
[0038] The test unit 47 includes a column 471 installed between the upper truss 401 and the lower truss 402, and a rack slot seat 472 is arranged at the lower part of the column 471. A movable rack 473 is movably connected inside the rack slot seat 472. The movable rack 473 passes through the rack guide slot seat 48 and a conductive metal hook 474 is arranged at the end; a cylindrical gear 475 is meshed above the movable rack 473, and one end of the gear shaft inside the cylindrical gear 475 is a gear shaft input end 476, and the other end is a gear shaft transmission end 477.
[0039] In this embodiment, the working principle of the auxiliary clamp and the test assembly is as follows: when the movable claw of the auxiliary clamp rotates around the connection between the movable claw and the operating rod shaft, the movable claw rotates toward the fixed claw, so that the auxiliary clamp is closed. Since the first truss assembly and the second truss assembly of the test assembly are rotatably connected on the side close to the operating rod through the hinged shaft assembly, the corresponding first truss assembly can be driven to move closer to the second truss assembly through the movable claw, thereby realizing the closing of the test assembly. Then, the driving component is used to drive the cylindrical gear to rotate through the input end of the gear shaft. Since multiple test units are power-connected through the spherical transmission universal joint assembly, multiple cylindrical gears can be linked, and then the cylindrical gear drives the corresponding moving rack to move in the rack groove seat. The moving rack moves inward under the guiding action of the rack guide groove seat so that the conductive metal hook contacts the tubular busbar, and finally multiple conductive metal hooks are attached to the tubular busbar, which can ensure that there is enough effective contact surface with the tubular busbar. The whole loop resistance test of the tubular busbar can be carried out through the test assembly; the current threading hole and the voltage threading hole are respectively opened inside the movable claw and the fixed claw, and the wiring of the loop resistance instrument passes through the current threading hole and the voltage threading hole and is electrically connected to the corresponding first test module and the second test module, so that the whole loop resistance of the tubular busbar knife switch can be directly and accurately measured, the defects of the tubular busbar knife switch can be accurately discovered and eliminated, the healthy operation state of the equipment can be improved, and the reliability of power supply can be ensured; of course, in actual use, the auxiliary clamping jaw structure can also be omitted, and the test assembly can replace the auxiliary clamping jaw, that is, the first truss assembly and the first test module are used to replace the movable claw, the second truss assembly and the second test module are used to replace the fixed claw, and the first truss assembly and the second truss assembly are hinged at one end, and the first truss assembly is connected to the push rod tightener at one end, so as to facilitate the control of the opening and closing of the first truss assembly relative to the second truss assembly, and the whole loop resistance test of the tubular busbar can also be realized.
[0040] The present invention is an auxiliary clamp for testing the full-loop resistance of a tubular busbar switch. During use, the present invention can realize remote operation through an operating rod 1 to improve operation safety; the opening and closing action of the auxiliary clamp 3 is realized through structures such as a top block 7 and a push rod tightener 5, thereby facilitating the opening and closing of a test component 4, thereby realizing that the test component 4 is directly connected to the tubular busbar, thereby accurately testing the full-loop resistance of the tubular busbar, accurately discovering and eliminating defects of the tubular busbar switch, improving the healthy operation state of the equipment, and ensuring the reliability of power supply; the test component 4 of the present invention is composed of a plurality of test units 47, and corresponding conductive metal hooks 474 for testing are arranged on the test units 47, thereby ensuring that there is sufficient effective contact area with the tubular busbar, thereby effectively increasing the contact points and improving the measurement accuracy; in addition, the present invention also performs testing through an ultrasonic tester 2 to realize double test comparison, further improving the measurement accuracy and precision; the present invention has the advantages of reasonable structure, easy use, good versatility, effective increase in contact points, double measurement comparison, and improved measurement accuracy.
Claims
1. An auxiliary fixture for testing the full-loop resistance of a busbar switch, comprising an operating rod and a test assembly, characterized in that: An ultrasonic tester is arranged in the front below the operating rod, an auxiliary clamp with an opening and closing structure is arranged at the lower end of the operating rod, a test component that opens and closes with the auxiliary clamp is arranged in front of the auxiliary clamp, and the auxiliary clamp is connected to the operating rod through a push rod tightener to realize the opening and closing movement of the test component; a hand-held handle is arranged on one side above the operating rod, a display screen is arranged on the other side of the operating rod above the operating rod opposite to the hand-held handle, and a top block for controlling the action of the push rod tightener is arranged on the top of the operating rod.
2. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 1, characterized in that: The operating rod comprises a hollow insulating rod, a push rod is arranged inside the hollow insulating rod, the upper end of the push rod is connected to the ejection block, and a slider is arranged at the lower end, and the slider is connected to the push rod tightener through a pin shaft.
3. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 2, characterized in that: A rubber block is arranged at the connection between the upper part of the ejection rod and the hand-held handle, a spring stop washer is arranged above the ejection rod, a spring stop block is arranged below the ejection rod, and a spring is arranged between the spring stop washer and the spring stop block.
4. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 3, characterized in that: The ultrasonic tester comprises a bottom plate, a main controller is arranged above the bottom plate, the main controller is mounted on the bottom plate by fixing bolts, and a group of ultrasonic sensors is arranged in front of the main controller.
5. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 4, characterized in that: The auxiliary clamp includes a movable claw and a fixed claw. The movable claw is rotatably installed under the operating rod and a current threading hole is opened inside the movable claw. The free end of the movable claw is connected to the push rod tightener shaft; the fixed claw is fixedly installed at the bottom end of the operating rod and a voltage threading hole is opened inside the fixed claw.
6. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 5, characterized in that: The test assembly includes a first truss assembly installed on a movable claw and a second truss assembly installed on a fixed claw. The first truss assembly and the second truss assembly are rotatably connected to each other on a side close to the operating rod through a hinged shaft assembly, and an opening is provided on a side away from the operating rod.
7. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 6, characterized in that: The first truss assembly and the second truss assembly have the same structure, and both include an upper truss and a lower truss. An upper inner truss is arranged on the inner side of the upper truss, and a lower inner truss is arranged on the inner side of the lower truss. The upper truss and the upper inner truss, and the lower truss and the lower inner truss are connected by a plurality of connecting rods arranged at intervals. The upper truss, the lower truss, the upper inner truss, and the lower inner truss are all polygonal structures.
8. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 7, characterized in that: The test assembly also includes a first test module installed inside the first truss assembly and a second test module installed inside the second truss assembly.
9. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 8, characterized in that: The first test module and the second test module have the same structure, and both are composed of a plurality of test units, and the plurality of test units are dynamically connected through a spherical transmission universal joint assembly.
10. An auxiliary fixture for testing the full-loop resistance of a busbar switch as claimed in claim 9, characterized in that: The test unit includes a column installed between an upper truss and a lower truss, a rack slot seat is provided at the lower part of the column, a movable rack is movably connected inside the rack slot seat, the movable rack passes through the rack guide slot seat and a conductive metal hook is provided at the end; a cylindrical gear is meshed above the movable rack, one end of the gear shaft inside the cylindrical gear is the gear shaft input end, and the other end is the gear shaft transmission end.