CN109406120B - Circuit breaker mechanical characteristic testing device - Google Patents
Circuit breaker mechanical characteristic testing device Download PDFInfo
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- CN109406120B CN109406120B CN201811347043.1A CN201811347043A CN109406120B CN 109406120 B CN109406120 B CN 109406120B CN 201811347043 A CN201811347043 A CN 201811347043A CN 109406120 B CN109406120 B CN 109406120B
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000006073 displacement reaction Methods 0.000 claims abstract description 62
- 238000009434 installation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention provides a mechanical characteristic testing device of a circuit breaker, wherein a sliding rod of a linear displacement sensor of the testing device is coaxially connected with a moving contact pull rod of the circuit breaker to be tested, so that the problems of rotation between the circuit breaker and the linear displacement sensor and lever phenomenon are solved, the linear displacement sensor cannot be damaged during testing, the mechanical characteristic testing result of the circuit breaker is more accurate, the structure is simple, the mounting position is flexible and adjustable, and the working stability and the strength requirement of the mechanical characteristic testing device of the circuit breaker are ensured.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a mechanical characteristic testing device of a circuit breaker.
Background
The circuit breaker is a common control and protection device in the power transmission and distribution industry, the most important control device in a power system is also the device with the most frequent action, and the circuit breaker is mainly used for controlling and protecting subordinate devices from being burnt out. When the power grid breaks down, the circuit breaker can react rapidly to process, avoid causing the injury, and the circuit breaker has higher fault rate in the operation process, in case the circuit breaker breaks down very easily arouses the power grid accident and causes great economic loss, consequently, the mechanical characteristic parameter of circuit breaker must guarantee within normal parameter range, if the parameter is not suitable, if the circuit breaker condition that can't fit or can't divide when breaking down appears, must lead to the fact serious consequence. The mechanical characteristic test of the circuit breaker has become one of the important indexes for manufacturers and users to check the performance of the circuit breaker.
At present, the mechanical characteristic test of the VSI circuit breaker in the industry only needs two modes, one mode is that an angular displacement sensor is arranged on a main shaft, the main shaft is arranged on a circuit breaker frame (the frame is used for assembling a main body component of the circuit breaker), and the angular displacement sensor is used for measuring the mechanical characteristic; the other is that the linear displacement sensor is arranged at the lower end of an insulating pull rod at the bottom of the breaker frame. These two measurement methods have certain problems: firstly, the cost of the angular displacement sensor is high, the installation is inconvenient, the linear displacement sensor is installed at the bottom of the frame of the circuit breaker, and when the lower end of the insulating pull rod is not provided with a screw hole, an additional tool is needed to install the linear displacement sensor, so that the installation is inconvenient; secondly, when the test is carried out, a plurality of manufacturers are installed in a handcart type, when the mechanical life test is carried out, the characteristic is required to be tested every 2000 times, at the moment, the chassis is required to be detached, after the mechanical characteristic test is finished, the chassis is installed again for running-in test, and the operation is complicated.
In order to solve the problems, the Chinese utility model patent document with the bulletin number of "CN 202066668U" named as "vacuum circuit breaker mechanical characteristic detection device" is provided, the displacement sensor of the detection device is fixedly connected with the connecting sleeve, the moving contact of the circuit breaker moves up and down during the test, and the connecting sleeve moves axially easily, so that the sliding rod of the displacement sensor is driven to deflect, the linear displacement sensor is damaged very easily, and the mechanical characteristic test result of the circuit breaker is inaccurate. In order to solve the problem of the deflection of the sliding rod of the displacement sensor, the Chinese utility model patent document with the publication number of "CN 204556241U" and the name of "a high-voltage vacuum circuit breaker mechanical characteristic testing device" is provided, the patent horizontally stretches out the connecting frame fixedly connected with the moving contact of the circuit breaker and then is connected with the sliding rod of the linear displacement sensor, the structure is complex, the lever phenomenon is easy to form, the linear displacement sensor is damaged, and the mechanical characteristic testing result of the circuit breaker is inaccurate.
Disclosure of Invention
The invention aims to provide a device for testing the mechanical characteristics of a circuit breaker, which is used for solving the problem that the test result of the mechanical characteristics of the circuit breaker in the prior art is inaccurate.
In order to achieve the purpose, the invention provides a circuit breaker mechanical characteristic testing device which comprises a linear displacement sensor, wherein the linear displacement sensor comprises a linear displacement sensor body and a linear displacement sensor sliding rod, the linear displacement sensor is fixedly assembled on a mounting rack, the mounting rack is used for being fixedly assembled with a circuit breaker frame to be tested, the circuit breaker mechanical characteristic testing device also comprises a switching device, one end of the switching device is fixedly connected with the linear displacement sensor sliding rod, the other end of the switching device is used for being detachably and fixedly connected with a moving contact pull rod of the circuit breaker to be tested, and the linear displacement sensor sliding rod and the moving contact pull rod of the circuit breaker to be tested are coaxially arranged.
The sliding rod of the linear displacement sensor is coaxially connected with the moving contact pull rod of the circuit breaker to be tested, so that the problems of rotation between the circuit breaker and the linear displacement sensor and lever phenomenon are solved, the linear displacement sensor cannot be damaged during testing, the mechanical characteristic testing result of the circuit breaker is more accurate, the structure is simple, the mounting position is flexible and adjustable, and the working stability and the strength requirement of the mechanical characteristic testing device of the circuit breaker are ensured.
In order to improve the coaxiality of the sliding rod of the linear displacement sensor and the moving contact pull rod of the circuit breaker to be tested, a connecting block is fixed on the linear displacement sensor body and is in adjustable fixed connection with the first mounting arm of the mounting frame through an adjustable screw rod.
In order to strengthen the reliable and stable connection between the displacement sensor and the mounting frame, the mounting frame is U-shaped, and the first mounting arm of the mounting frame is fixedly assembled with the linear displacement sensor body.
In order to improve the reliability of the linear displacement sensor during operation, the second mounting arm of the mounting rack is used for being detachably and fixedly assembled with a frame of the circuit breaker to be tested. The mounting structure is stable and the strength is high.
In order to improve the reliability of the linear displacement sensor during operation, the second mounting arm of the mounting rack is used for being fixedly assembled with the to-be-tested circuit breaker frame through bolts.
Drawings
Fig. 1 is a schematic structural diagram of a mechanical characteristic testing device of a circuit breaker according to the present invention;
FIG. 2 is a schematic structural diagram of a linear displacement sensor according to the present invention;
fig. 3 is a schematic structural view of a connection block of the mechanical characteristic testing apparatus for a circuit breaker according to the present invention;
fig. 4 is a schematic structural view of a mounting bracket of the mechanical characteristic testing device of the circuit breaker of the present invention;
in the figure: 1-a linear displacement sensor, 11-a linear displacement sensor sliding rod and 12-a linear displacement sensor body; 2-breaker moving contact pull rod; 3-a switching device; 4-connecting block, 41-first threaded hole, 42-third threaded hole, 43-second threaded hole; 5-adjusting the screw rod; 6-breaker frame, 61-third mounting hole; 7-mounting bracket, 71-first mounting hole, 72-second mounting hole; 8-a first connector; 9-second connecting member.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings:
the invention provides a device for testing mechanical characteristics of a circuit breaker, which comprises a linear displacement sensor, wherein the linear displacement sensor comprises a linear displacement sensor body and a linear displacement sensor sliding rod, the linear displacement sensor is fixedly assembled on an installation frame, the installation frame is used for fixedly assembling with a circuit breaker frame to be tested, the device also comprises a switching device, one end of the switching device is fixedly connected with the linear displacement sensor sliding rod, the other end of the switching device is used for detachably and fixedly connecting with a moving contact pull rod of the circuit breaker to be tested, and the linear displacement sensor sliding rod and the moving contact pull rod of the circuit breaker to be tested are coaxially arranged. When the testing device tests the mechanical characteristics of the circuit breaker, the deflection of the sliding rod of the linear displacement sensor can not be caused, so that the test result of the mechanical characteristics of the circuit breaker is more accurate, the structure is simple, the mounting position is flexible and adjustable, and the working stability and the strength requirement of the mechanical characteristic testing device of the circuit breaker are ensured.
As shown in fig. 1, the mechanical characteristic testing device of the circuit breaker comprises a linear displacement sensor 1, a moving contact pull rod 2 of the circuit breaker, a switching device 3, a connecting block 4, a circuit breaker frame 6 and a mounting frame 7, the mounting frame 7 is of a U shape, the circuit breaker frame 6 and the mounting frame 7 are connected, the linear displacement sensor 1 comprises a linear displacement sensor sliding rod 11 and a linear displacement sensor body 12, one end of the switching device 3 is fixedly connected with the linear displacement sensor sliding rod 11, the other end of the switching device 3 is used for being connected with the moving contact pull rod 2 of the circuit breaker, a connecting block 4 is fixedly connected onto the linear displacement sensor body 12, and the linear displacement sensor body 12 is connected with the mounting. As another embodiment, the adapter 3 may be integral with the slide bar.
Specifically, a first threaded hole 41 and a second threaded hole 43 are formed in the connecting block 4, the hole diameters of the first threaded hole 41 and the second threaded hole 43 are the same, an adjusting screw rod 5 is arranged on the first threaded hole 41 and the second threaded hole 43, and the connecting block 4 is connected with a first mounting arm of the mounting frame 7 through an adjustable screw rod and used for guaranteeing the consistency of the movement of the linear displacement sensor sliding rod 11 and the breaker moving contact pull rod 2 in the vertical direction. The connecting block 4 is further provided with a third threaded hole 42, the mounting frame 7 is provided with a first mounting hole 71, a first connecting piece 8 is arranged between the third threaded hole 42 and the first mounting hole 71, and the first connecting piece 8 fixedly connects the linear displacement sensor 1 with the mounting frame 7.
The switching device 3 of the embodiment is hexahedral, so that a common tool can conveniently clamp the switching device and fasten the switching device with a breaker moving contact pull rod and a linear displacement sensor sliding rod 11; one end of the inner surface is an internal thread which is matched and connected with the external thread of the breaker moving contact pull rod 2, and the other end of the inner surface is an internal thread which is matched and connected with the external thread of the linear displacement sensor sliding rod 11.
In order to connect the mounting rack 7 and the circuit breaker frame 6 together, the second mounting arm of the mounting rack 7 and the circuit breaker frame to be tested can be detachably and fixedly assembled, as another embodiment, the second mounting arm of the mounting rack 7 and the circuit breaker frame to be tested can also be fixedly connected through a bolt, as shown in fig. 1, a second mounting hole 72 is further formed in the mounting rack 7, a third mounting hole 61 is formed in the circuit breaker frame 6, a second connecting piece 9 is arranged between the second mounting hole 72 and the third mounting hole 61, the mounting rack 7 and the circuit breaker frame 6 are fixed together through the second connecting piece 9, the second mounting hole 72 of the embodiment is an elongated hole, and as another embodiment, the second mounting hole 72 can be set to be in other shapes as required.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (4)
1. A circuit breaker mechanical characteristic testing device comprises a linear displacement sensor, wherein the linear displacement sensor comprises a linear displacement sensor body and a linear displacement sensor sliding rod, the linear displacement sensor is fixedly assembled on a mounting rack, and the mounting rack is used for fixedly assembling with a circuit breaker frame to be tested; the linear displacement sensor is characterized in that a connecting block is fixed on the linear displacement sensor body and is adjustably and fixedly connected with the mounting frame through an adjustable screw.
2. The apparatus for testing mechanical characteristics of a circuit breaker according to claim 1, wherein the mounting bracket is U-shaped, and the first mounting arm of the mounting bracket is fixedly assembled with the linear displacement sensor body.
3. The apparatus for testing mechanical characteristics of circuit breaker according to claim 2, wherein the second mounting arm of the mounting bracket is adapted to be removably and fixedly assembled with the frame of the circuit breaker to be tested.
4. The apparatus for testing mechanical characteristics of circuit breaker according to claim 2, wherein the second mounting arm of the mounting bracket is adapted to be fixedly assembled with the frame of the circuit breaker to be tested by means of bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347043.1A CN109406120B (en) | 2018-11-13 | 2018-11-13 | Circuit breaker mechanical characteristic testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347043.1A CN109406120B (en) | 2018-11-13 | 2018-11-13 | Circuit breaker mechanical characteristic testing device |
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| Publication Number | Publication Date |
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| CN109406120A CN109406120A (en) | 2019-03-01 |
| CN109406120B true CN109406120B (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811347043.1A Active CN109406120B (en) | 2018-11-13 | 2018-11-13 | Circuit breaker mechanical characteristic testing device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630636A (en) * | 2020-11-18 | 2021-04-09 | 上海置信电气非晶有限公司 | Method for measuring mechanical characteristics of strut-type on-column circuit breaker |
| CN113848047B (en) * | 2021-09-28 | 2024-05-28 | 江苏大烨智能电气股份有限公司 | Structure and method for measuring open-range over-travel of breaker through direct motion |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439652A (en) * | 2013-06-27 | 2013-12-11 | 国家电网公司 | Breaker post testing device |
| CN104142230A (en) * | 2013-11-30 | 2014-11-12 | 国家电网公司 | Device for testing mechanical characteristics of circuit breaker |
| CN204214639U (en) * | 2014-10-17 | 2015-03-18 | 大全集团有限公司 | Breaker mechanic property proving installation |
| CN105277881A (en) * | 2015-11-23 | 2016-01-27 | 广东电网有限责任公司电力科学研究院 | Multifunctional testing device for mechanical properties of high voltage vacuum circuit breaker |
| CN205300903U (en) * | 2015-11-27 | 2016-06-08 | 广东电网有限责任公司电力科学研究院 | Rotatory dual -purpose circuit breaker mechanical characteristic detection device of straight line |
-
2018
- 2018-11-13 CN CN201811347043.1A patent/CN109406120B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439652A (en) * | 2013-06-27 | 2013-12-11 | 国家电网公司 | Breaker post testing device |
| CN104142230A (en) * | 2013-11-30 | 2014-11-12 | 国家电网公司 | Device for testing mechanical characteristics of circuit breaker |
| CN204214639U (en) * | 2014-10-17 | 2015-03-18 | 大全集团有限公司 | Breaker mechanic property proving installation |
| CN105277881A (en) * | 2015-11-23 | 2016-01-27 | 广东电网有限责任公司电力科学研究院 | Multifunctional testing device for mechanical properties of high voltage vacuum circuit breaker |
| CN205300903U (en) * | 2015-11-27 | 2016-06-08 | 广东电网有限责任公司电力科学研究院 | Rotatory dual -purpose circuit breaker mechanical characteristic detection device of straight line |
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| CN109406120A (en) | 2019-03-01 |
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