CN204905172U - Circuit breaker with aassessment contact wear - Google Patents
Circuit breaker with aassessment contact wear Download PDFInfo
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- CN204905172U CN204905172U CN201520704661.2U CN201520704661U CN204905172U CN 204905172 U CN204905172 U CN 204905172U CN 201520704661 U CN201520704661 U CN 201520704661U CN 204905172 U CN204905172 U CN 204905172U
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- circuit breaker
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Abstract
The utility model provides a circuit breaker with aassessment contact wear, belongs to the low -voltage electrical equipment field. Including setting up at the inside quiet contact system of circuit breaker casing, moving contact system, operating device and the control unit, the contact system that moves include moving contact, contact support, the moving contact rotate to set up on the contact is supported, quiet contact system including the static contact, operating device drive the contact support to drive moving contact and static contact realization electrical contact cooperation still include a displacement measurement mechanism, displacement measurement mechanism fixed set up on the circuit breaker casing and with the contact support be connected for it still is connected with the the control unit electricity in the ascending displacement in contact closure side, this displacement measurement mechanism to measure the contact support. Evaluate the contact wear condition of circuit breaker through measuring the contact support along the displacement volume of the closed direction of contact, have simple structure, installation and convenient operation, advantage that measurement accuracy is high.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, is specifically related to a kind of circuit breaker with assessment contact wear, and it to assess the contact wear situation of circuit breaker along the displacement in contact closure direction by measuring contact support.
Background technology
Circuit breaker contact when operating more or less can wear and tear, when particularly there is electric arc.After a large amount of operation, this wearing and tearing may cause circuit breaker to break down, and affect the safety and reliability of this equipment.In order to reduce this risk, normally after the operation of pre-determined number, systematically changing contact or whole circuit breaker, and not considering the actual wear situation of contact.But this How It Works can not solve root problem, because operate at every turn, the wear extent of contact is all different.Owing to cannot judge the wear extent operating back contact accurately at every turn.For example, circuit breaker is after repeatedly cut-offfing larger fault current, and when not reaching pre-determined number, this circuit breaker cannot operate safely with reliably; Again for example, circuit breaker has reached predetermined number of times, but also deathtrap arriving wearing and tearing etc. far away, contact.
Therefore, assess the ability of contact integrality or judge actual wear degree, the information therefrom obtaining contact remaining life or terminate useful life, brings significant advantage.For the powerful device of some infrequently actions, the state of customary visual assessment contact abrasion when attended operation, such as equipped wear indicator on contact.This operation only can be carried out when cut-off switch unit, and for safety applications, namely circuit breaker is only threaded off and contact situation about usually remaining closed once in a while, and this inspection is just enough.But, for other applications developed, the safety means of such as wind turbine apparatus, its number of operations constantly increases, and require that the durability of contact is higher, just bring problem if carry out visual inspection contact with interval default maintenance time and can not actual needs be met.
In prior art, occur describing in " on-line monitoring breaker contact point abrasion condition technology " by measuring operating mechanism and contact part connecting axle changes to detect contact wear in the operating characteristics of making process.Transducer one end used is arranged on connecting axle, and the other end is fixed on circuit breaker base.As everyone knows, connecting axle is under making process and "on" position, and it is subject to the effect of not operating mechanism actuating force at grade and contact part counter-force, causes power transmission shaft to produce radial distortion; Meanwhile, what the existence in gap can make power transmission shaft not carry on as usual rotates around the same center of circle, and especially upon wear, power transmission shaft radial-deformation and pivot all can change.Above-mentioned reason can affect the certainty of measurement of transducer.
Summary of the invention
The purpose of this utility model be to provide a kind of structure simple, install and easy to operate, that certainty of measurement the is high circuit breaker with assessment contact wear, it to assess the contact wear situation of circuit breaker along the displacement in contact closure direction by measuring contact support.
The purpose of this utility model reaches like this, a kind of circuit breaker with assessment contact abrasion, comprise the static contact system being arranged on Shell of circuit breaker inside, movable contact system, operating mechanism and control unit, described movable contact system comprises moving contact, contact is supported, described moving contact rotates and is arranged in contact support, described static contact system includes fixed contact, contact support described in described operating mechanism drives, thus drive moving contact to realize electrical contact with fixed contact and coordinate, also comprise a displacement measurement mechanism, described displacement measurement mechanism to be fixedly installed on Shell of circuit breaker and to be connected with described contact support, displacement on contact closure direction is supported in for measuring contact, this displacement measurement mechanism is also electrically connected with control unit.
In a specific embodiment of the present utility model, described displacement measurement mechanism includes and is fixed on checkout gear on Shell of circuit breaker and contiguous block, the measuring junction of described checkout gear skids off and is fixedly connected with contiguous block in checkout gear, by hole that it is offered and contact, described contiguous block supports that structure is for being slidably connected, for being the translational motion of measuring junction by the convert rotational motion of contact support.
In another specific embodiment of the present utility model, the hole that described contiguous block is offered is mounting hole, and described contact support is provided with boss, and described boss to be arranged in mounting hole and freely up and down can to slide in mounting hole.
In another specific embodiment of the present utility model, described displacement measurement mechanism also includes a guiding parts, and described guiding parts is fixedly installed on Shell of circuit breaker, and described measuring junction is located in guiding parts.
In another specific embodiment of the present utility model, described operating mechanism includes energy storage component, energy storage lever and link assembly, one end of energy storage component is hinged with energy storage lever, energy storage lever be provided with a jointed shaft and hit roller, jointed shaft is hinged with link assembly, and the contact on link assembly and movable contact system is supported hinged.
In an of the present utility model and then specific embodiment, described link assembly comprises first connecting rod, second connecting rod, main shaft connecting rod and articulated linkage, one end of first connecting rod is hinged on jointed shaft, the other end of first connecting rod is hinged with one end of second connecting rod, the other end of second connecting rod is hinged with one end of main shaft connecting rod, the other end of main shaft connecting rod is hinged with articulated linkage, and the other end of articulated linkage is hinged on contact and supports, main shaft connecting rod is fixedly installed on breaker main shaft.
The utility model to assess the contact wear situation of circuit breaker along the displacement in contact closure direction by measuring contact support, have structure simple, install and easy to operate, that certainty of measurement is high advantage.
Accompanying drawing explanation
Fig. 1 is the section plan of displacement measurement mechanism described in the utility model installation site on-board the circuit breaker.
Fig. 2 is the stereogram of displacement measurement mechanism described in the utility model installation site on-board the circuit breaker.
Fig. 3 is the planar structure schematic diagram of circuit breaker described in the utility model.
Fig. 4 is the planar structure schematic diagram of circuit breaker described in the utility model at open position.
Fig. 5 is the planar structure schematic diagram of circuit breaker described in the utility model when dynamic/static contact just contacts.
Fig. 6 is the planar structure schematic diagram of circuit breaker described in the utility model at closing position
Fig. 7 is the planar structure schematic diagram of circuit breaker described in the utility model in dead-centre position.
Fig. 8 is the displacement curve figure that contact described in the utility model is supported on contact closure direction.
Fig. 9 is the speed curve diagram that contact described in the utility model is supported on contact closure direction.
In figure: 1. static contact system, 11. fixed contacts, 111. fixed contacts; 2. movable contact system, 21. moving contacts, 211. moving contacts, 22. contact supports, 221. boss, 23. contact rotating shafts, 24. touch springs, 25. moving contact bearings; 3. operating mechanism, 31. energy storage components, 311. energy-stored springs, 32. energy storage levers, 321. jointed shafts, 322. hit roller, 33. link assemblies, 331. first connecting rods, 332. second connecting rods, 333. main shaft connecting rods, 334. articulated linkage; 4. displacement measurement mechanism, 41. checkout gears, 411. measuring junctions, 42. contiguous blocks, 421. mounting holes, 43. guiding partss.
Embodiment
Applicant will be described in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection range of the present utility model.
Refer to Fig. 1, Fig. 2 and Fig. 3, the utility model relates to a kind of circuit breaker with assessment contact wear, includes static contact system 1, movable contact system 2, operating mechanism 3 and control unit.Described movable contact system 2 includes moving contact 21, contact supports 22, contact rotating shaft 23, touch spring 24 and moving contact bearing 25, moving contact 21 is provided with moving contact 211, contact rotating shaft 23 is located in contact and supports on 22, moving contact 21 is rotated by contact rotating shaft 23 and is arranged in described contact support 22, contact support 22 is rotated and is arranged on moving contact bearing 25, touch spring 24 is arranged on moving contact 21 and contact is supported between 22, touch spring 24 is preferably Compress Spring, this configuration makes moving contact 21 have excess of stroke process, and have suitable contact pressure, static contact system 1 includes fixed contact 11, and described fixed contact 11 is provided with fixed contact 111, and described fixed contact 11 realizes electrical contact with moving contact 21 by fixed contact 111, moving contact 211.The operating mechanism 3 of circuit breaker includes energy storage component 31, energy storage lever 32 and link assembly 33, one end of energy storage component 31 is hinged with energy storage lever 32, energy storage lever 32 be provided with a jointed shaft 321 and hit roller 322, jointed shaft 321 is hinged with a link assembly 33, the other end of link assembly 33 is hinged in the contact support 22 of movable contact system 2.Concrete, link assembly 33 comprises first connecting rod 331, second connecting rod 332, main shaft connecting rod 333 and articulated linkage 334, one end of first connecting rod 331 is hinged on jointed shaft 321, the hinged second connecting rod 332 of the other end of first connecting rod 331, one end of the other end articulated spindle connecting rod 333 of second connecting rod 332, the other end of main shaft connecting rod 333 is hinged with articulated linkage 334, and the other end of articulated linkage 334 is hinged on contact and supports that on 22, main shaft connecting rod 333 is fixedly installed on breaker main shaft.Moving contact 21 to be electrically connected with movable contact bus bar by being flexible coupling, and contact support 22 is rotated and is arranged on the moving contact bearing 25 fixing with movable contact bus bar, and fixed contact 11 is electrically connected with fixed contact busbar.In the making process of circuit breaker, energy-stored spring 311 in energy storage component 31 releases energy, drive the action of energy storage lever 32, drivening rod assembly 33 action after the action of tactile energy lever 32, the moving contact 21 that final drive is arranged in contact support 22 rotates and realizes coordinating with fixed contact 11 electrical contact, namely realize electrical contact between moving contact 211, fixed contact 111 to coordinate, such fixed contact busbar, fixed contact 11, moving contact 21, be flexible coupling, form a galvanic circle between movable contact bus bar.
The utility model relates to a kind of circuit breaker with assessment contact wear, also comprises a displacement measurement mechanism 4, and described displacement measurement mechanism 4 to be fixedly installed on Shell of circuit breaker and to realize being slidably connected with contact support 22.Concrete, described displacement measurement mechanism 4 comprises checkout gear 41 and contiguous block 42, described checkout gear 41 is fixedly installed on the outside of Shell of circuit breaker, one end of checkout gear 41 is offered porose, the measuring junction 411 of such checkout gear 41 just can skid off and be fixedly connected with contiguous block 42 in above-mentioned hole.Concrete, the hole that described contiguous block 42 is offered is mounting hole 421, is slidably connected with contact support 22 by this mounting hole 421, for contact being supported the convert rotational motion translational motion of measuring junction 411 of 22.In order to realize supporting with contact 22 coordinate, contact support 22 is provided with boss 221, and described boss 221 is equipped with in mounting hole 421, and boss 211 freely up and down can slide in mounting hole 421.Wherein, measuring junction 411 directly can be connected with a universal joint and coordinates with contact support 22 or be provided with protruding and described contact support 22 in one end of contiguous block 4 to offer fit depressions same be also feasible.In addition, checkout gear 41 can be the device of displacement transducer or other measurement displacements, as long as energy Measurement accuracy contact supports the displacement on 22 contact closure directions.
Preferably, displacement measurement mechanism 4 described in the utility model also includes a guiding parts 43, and described guiding parts 43 is fixedly installed on Shell of circuit breaker, and described measuring junction 411 is located in guiding parts 43.Wherein, the optimum installation site of guiding parts 43 is for be positioned on same level line with moving contact 211, fixed contact 111 contact position, now the spacing of moving contact and fixed contact can the stroke of reflected measurement end 411 exactly, thus makes the sampling of displacement measurement mechanism 4 more accurate.
Checkout gear 41 can according in dynamic and static contact closure process, and contact support 22 is that the change in displacement of parameter draws a displacement curve with time on contact closure direction, as shown in Figure 8.After wherein control unit processes this displacement curve, obtain the rate curve that this contact supports 22, as shown in Figure 9, can be obtained by this rate curve, when circuit breaker dynamic/static contact just contacts, in the i.e. T0 moment, the acceleration of this contact support is undergone mutation, i.e. this A(A ＇) be the flex point of this displacement curve.
The utility model assesses contact wear like this, the first step measures the first particular value, the first described particular value is under the non-abrasion condition of circuit breaker, moving contact 211 from just action to fixed contact 111 just contact process, its contact supports that 22 along the first particular displacement amount X1 on contact closure direction, as as described in Fig. 8 curve I, moving contact 211 has just started the S point of point corresponding to Fig. 8 of action, the point that moving contact 211 and fixed contact 111 have just contacted corresponds to the A point of Fig. 8, the size then displacement corresponding to A point and the difference between the displacement corresponding to S point of the first namely described particular displacement amount X1, using this difference stored in the control unit of circuit breaker as initial value, second step measures the second particular value, the determination of the second described particular value be at circuit breaker when closing a floodgate each time, moving contact 211 from just action to fixed contact 111 just contact process, contact supports that 22 along the second particular displacement amount X2 on closing of contact direction, as as described in Fig. 8 curve II, moving contact 211 has just started the S point of point corresponding to Fig. 8 of action, the point that moving contact 211 and fixed contact 111 have just contacted corresponds to the A ＇ point of Fig. 8, the size then displacement corresponding to A ＇ point and the difference between the displacement corresponding to S point of the second namely described particular displacement amount X2.Calculate the difference between the second particular displacement amount X2 and the first particular displacement amount X1, the contact wear of assessment circuit breaker, along with the wearing and tearing of contact, the difference of the first particular displacement amount X2 and the second particular displacement amount X1 can be increasing, if when the difference calculated between the second particular displacement amount X2 and the first particular displacement amount X1 is greater than the threshold values preset arranged in control unit, then by control unit output alarm signal, reminding user to replace or maintenance circuit breaker.
Refer to Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, circuit breaker is in closing course, press switch knob or the action of Long-distance Control making electromagnet, energy-stored spring 311 in energy storage component 31 discharges, energy storage lever 32 is under the effect of energy-stored spring 311, strike roller 322 on it collides with the axle that overwhelms be arranged on first connecting rod 331, first connecting rod 331 is rotated, drive second connecting rod 332 action hinged with it, the main shaft connecting rod 333 be fixedly installed on breaker main shaft drives main shaft to rotate under the effect of second connecting rod 332, drive articulated linkage 334 action, and then to promote and the hinged contact of articulated linkage 334 supports that 22 to the action of contact closure direction, moving contact 211 contacts with fixed contact 111, the i.e. T0 moment, the movement velocity of now contact support 22 reaches maximum (as shown in Figure 9), the flex point A (A ＇) of the displacement curve namely shown in Fig. 8, after moving contact 211 contacts with fixed contact 111, due to the stop of fixed contact 11, moving contact 21 no longer continues to move downward, contact support 22 continues to move downward contact and supports 22 in dynamic/static contact closing course along the maximum displacement Xmax place on contact closure direction, now first connecting rod 331 and second connecting rod 332 reach dead-centre position (as shown in Figure 7), and namely first connecting rod 331 is arranged in 180 ° with second connecting rod 332, after first connecting rod 331 and second connecting rod 332 cross dead point, second connecting rod 332 turn an angle and after driving main shaft connecting rod 333 reverse rotation limited bar (not shown) spacing, main shaft connecting rod 333 drives articulated linkage 334 to move to away from contact closure direction, and then band moving contact supports that 22 move to the direction away from contact closure equally, until contact supports 22 to arrive final dynamic/static contact make position, the final mean annual increment movement amount Xfianl of contact support 22 in contact closure direction.
Be calculated as follows: first obtain under the non-abrasion condition of circuit breaker (as Fig. 8 curve I) very first time T0 moment contact and support 22 to the displacement X1 in contact closure direction, namely the displacement on curve I corresponding to A point, and stored in control unit as initial value.Obtain circuit breaker (as Fig. 8 curve II) contact in each making process again and support 22 to the displacement X2 in contact closure direction, namely the displacement on curve II corresponding to A ', the final difference calculating X1, X2 judges the wear extent of breaker contact point, along with the continuous wearing and tearing of contact, the difference of X2 and X1 constantly increases, if when the difference calculated between X2 and X1 is greater than the threshold values preset arranged in control unit, then by control unit output alarm signal, reminding user to replace or maintenance circuit breaker.
Claims (6)
1. one kind has the circuit breaker of assessment contact abrasion, comprise the static contact system (1) being arranged on Shell of circuit breaker inside, movable contact system (2), operating mechanism (3) and control unit, described movable contact system (2) comprises moving contact (21), contact supports (22), described moving contact (21) rotates and is arranged in contact support (22), described static contact system (1) includes fixed contact (11), contact support (22) described in described operating mechanism (3) drives, thus drive moving contact (21) to realize electrical contact with fixed contact (11) and coordinate, it is characterized in that: also comprise a displacement measurement mechanism (4), described displacement measurement mechanism (4) to be fixedly installed on Shell of circuit breaker and to be connected with described contact support (22), for measuring contact support (22) displacement on contact closure direction, this displacement measurement mechanism (4) is also electrically connected with control unit.
2. a kind of circuit breaker with assessment contact abrasion according to claim 1, it is characterized in that described displacement measurement mechanism (4) includes and be fixed on checkout gear (41) on Shell of circuit breaker and contiguous block (42), the measuring junction (411) of described checkout gear (41) skids off and is fixedly connected with contiguous block (42) in checkout gear (41), described contiguous block (42) by hole that it is offered and contact support (22) structure for being slidably connected, for by the convert rotational motion of contact support (22) being the translational motion of measuring junction (411).
3. a kind of circuit breaker with assessment contact abrasion according to claim 2, it is characterized in that the hole that described contiguous block (42) is offered is mounting hole (421), described contact support (22) is provided with boss (221), and described boss (221) to be arranged in mounting hole (421) and freely up and down can to slide in mounting hole (421).
4. a kind of circuit breaker with assessment contact abrasion according to claim 2, it is characterized in that described displacement measurement mechanism (4) also includes a guiding parts (43), described guiding parts (43) is fixedly installed on Shell of circuit breaker, and described measuring junction (411) is located in guiding parts (43).
5. a kind of circuit breaker with assessment contact abrasion according to claim 1, it is characterized in that described operating mechanism (3) includes energy storage component (31), energy storage lever (32) and link assembly (33), one end of energy storage component (31) is hinged with energy storage lever (32), energy storage lever (32) be provided with a jointed shaft (321) and hit roller (322), jointed shaft (321) is hinged with link assembly (33), link assembly (33) is hinged with the contact support (22) on movable contact system (2).
6. a kind of circuit breaker with assessment contact abrasion according to claim 5, it is characterized in that described link assembly (33) comprises first connecting rod (331), second connecting rod (332), main shaft connecting rod (333) and articulated linkage (334), one end of first connecting rod (331) is hinged on jointed shaft (321), the other end of first connecting rod (331) is hinged with one end of second connecting rod (332), the other end of second connecting rod (332) is hinged with one end of main shaft connecting rod (333), the other end of main shaft connecting rod (333) is hinged with articulated linkage (334), the other end of articulated linkage (334) is hinged in contact support (22), main shaft connecting rod (333) is fixedly installed on breaker main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520704661.2U CN204905172U (en) | 2015-09-11 | 2015-09-11 | Circuit breaker with aassessment contact wear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520704661.2U CN204905172U (en) | 2015-09-11 | 2015-09-11 | Circuit breaker with aassessment contact wear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204905172U true CN204905172U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520704661.2U Active CN204905172U (en) | 2015-09-11 | 2015-09-11 | Circuit breaker with aassessment contact wear |
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| CN (1) | CN204905172U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531480A (en) * | 2016-11-14 | 2017-03-22 | 国家电网公司 | Online monitoring method for contact of vacuum circuit breaker |
| CN106768923A (en) * | 2016-11-30 | 2017-05-31 | 中国电力科学研究院 | A kind of vacuum arc-extinguishing chamber contact wear extent real-time online intelligent monitoring method and device |
| CN106847562A (en) * | 2016-12-30 | 2017-06-13 | 无锡新宏泰电器科技股份有限公司 | A kind of breaker contact system indicated with abrasion |
| CN110544608A (en) * | 2018-05-29 | 2019-12-06 | 江苏大全凯帆开关有限公司 | Auxiliary mechanism of circuit breaker |
| US11908646B2 (en) | 2021-06-16 | 2024-02-20 | Schneider Electric Industries Sas | Breaking device for a medium voltage electrical circuit |
-
2015
- 2015-09-11 CN CN201520704661.2U patent/CN204905172U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531480A (en) * | 2016-11-14 | 2017-03-22 | 国家电网公司 | Online monitoring method for contact of vacuum circuit breaker |
| CN106768923A (en) * | 2016-11-30 | 2017-05-31 | 中国电力科学研究院 | A kind of vacuum arc-extinguishing chamber contact wear extent real-time online intelligent monitoring method and device |
| CN106847562A (en) * | 2016-12-30 | 2017-06-13 | 无锡新宏泰电器科技股份有限公司 | A kind of breaker contact system indicated with abrasion |
| CN110544608A (en) * | 2018-05-29 | 2019-12-06 | 江苏大全凯帆开关有限公司 | Auxiliary mechanism of circuit breaker |
| US11908646B2 (en) | 2021-06-16 | 2024-02-20 | Schneider Electric Industries Sas | Breaking device for a medium voltage electrical circuit |
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