CN106197817B - Breaker double leval jib tightness degree detector and its detection method - Google Patents
Breaker double leval jib tightness degree detector and its detection method Download PDFInfo
- Publication number
- CN106197817B CN106197817B CN201610587537.1A CN201610587537A CN106197817B CN 106197817 B CN106197817 B CN 106197817B CN 201610587537 A CN201610587537 A CN 201610587537A CN 106197817 B CN106197817 B CN 106197817B
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- raker
- pointer
- double leval
- leval jib
- torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/223—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to joystick controls
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Abstract
The present invention relates to a kind of breaker double leval jib tightness degree detectors, including body and torque-indicating wrench, the inside of the body is equipped with cavity, it is equipped in the cavity to catch in the middle part of the connecting rod of top simultaneously toward the first raker of drop-down, it is additionally provided in the cavity to catch in the middle part of lower link simultaneously toward the second raker of pull-up, vertically extending rack gear is equipped on first raker and the second raker, it is engaged with driving gear between two rack gears, the interface to the adaptor cup jointing with torque-indicating wrench positioned at engine body exterior is connected at the axle center of the driving gear.The structure of the breaker double leval jib tightness degree detector is simple, and elasticity is adjusted intuitively, conveniently, and accommodation accuracy is high, high-efficient.
Description
Technical field
The present invention relates to a kind of breaker double leval jib tightness degree detector and its detection methods.
Background technique
Breaker often realizes the opening and closing movement of three-phase ontology with the double leval jib kind of drive, needs to adjust in debugging process
Connecting rod elasticity, the method used now is is individually placed to adjacent two-phase connecting rod with the thumb of hand and other fingers（Such as Fig. 5 institute
Connecting rod 1 and connecting rod 2 15, connecting rod 3 16 and the connecting rod 4 17 shown）Centre, compression connecting rod is to feel elasticity, due to not
Same manpower power is of different sizes, and adjustment back link elasticity number is caused to have differences, and directly affects measurement result, and the prior art exists
Following deficiency：
1, service personnel adjusts the elasticity of double leval jib by swivel link, and the elasticity for testing double leval jib is then adopted
The elasticity of double leval jib is felt by the elastic force between connecting rod with manpower compression connecting rod, such survey method has uncertain and inaccurate
True property, the perception of the same person may be because uncomfortable and change, and there is more likely to be differences for different people's perception.
It is tight slightly to judge double leval jib elasticity by accident if 2, felt, after adjusting loose double leval jib, breaker is after multi-pass operation
Double leval jib vibration is larger, may deviate from, lead to breaker body tripping, and the mechanism of breaker becomes unloaded operation, may
Cause the damage of breaker mechanism internal component.
It is partially loose to judge double leval jib elasticity by accident if 3, felt, after tightening double leval jib, the on/off switch speed of breaker
May be less than normal, cause testing mechanical characteristic unqualified.Meanwhile breaker, after multi-pass operation, the double leval jib of tension may
Cause the fracture of double leval jib connector.
4, same breaker need to be tested twice, test between A phase 18 and B phase 19, connect respectively between B phase 19 and C phase 20
The elasticity of bar will not only guarantee that unilateral elasticity will meet the requirements, but also guarantee that the elasticity on both sides is consistent.If
Feel both sides elasticity it is inconsistent when, the speed of breaker on/off switch can be relatively low, causes testing mechanical characteristic unqualified.
5, cause the unqualified of mechanical property due to feeling the uncertainty of double leval jib elasticity, need to overhaul people
Repeatedly adjustment double leval jib elasticity and testing mechanical characteristic, frequent adjustment and test cause maintenance process time-consuming and laborious to member.
6, breaker needs double leval jib of dismantling after shop test is qualified, need to reinstall double leval jib and adjustment four in substation
The elasticity of connecting rod has uncertainty, may cause the debugging test in substation and workshop since different feels feels different
Data are variant, even underproof.
Summary of the invention
In view of the deficiencies in the prior art, technical problem to be solved by the invention is to provide a kind of structures simply, adjusting side
Just breaker double leval jib tightness degree detector and its detection method.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of breaker double leval jib elasticity detection dress
It sets, including body and torque-indicating wrench, the inside of the body is equipped with cavity, is equipped in the cavity and connects to catch on top
In the middle part of bar and toward the first raker of drop-down, it is additionally provided in the cavity to catch on second hooking in the middle part of lower link and toward pull-up
Bar is equipped with vertically extending rack gear on first raker and the second raker, driving gear is engaged between two rack gears, described
The interface to the adaptor cup jointing with torque-indicating wrench positioned at engine body exterior is connected at the axle center of driving gear.
Preferably, first raker includes the first vertically extending body of rod, the top of first body of rod be equipped with to
Vertically catch on the first recess portion of top connecting rod.
Preferably, second raker includes the second vertically extending body of rod, the bottom of second body of rod be equipped with to
Vertically catch on the second recess portion of lower link.
Preferably, two rack gears are located in the adjacent side of first body of rod and second body of rod, and the cavity is being located at the first bar
The opposite flank of the rack gear of body is equipped at least two the first roller bearings to guide the first raker to slide vertically, and the cavity exists
Opposite flank positioned at the rack gear of second body of rod is equipped at least two the second roller bearings to guide the second raker to slide vertically.
Preferably, the driving gear is set in cavity through shaft, and the cross-sectional shape of the interface is rectangle.
Preferably, it is installed with circular angle dial in the body vertical plane between the interface and body, it is described
Angle dial is equipped with the first pointer, is additionally provided with the second pointer to rotate synchronously with interface, shaft, driving gear.
Preferably, second pointer is fixedly connected with interface, and first pointer and angle dial are coaxially connected.
Preferably, the design length of the rack gear is 10 ㎝, and the material of the body is metal.
A kind of detection method of breaker double leval jib tightness degree detector, carries out according to the following steps：
1）The acquisition that data are carried out using the suitable breaker double leval jib of elasticity, first adjusts driving gear, and first is hooked
Bar and the second raker vertically catch on wherein upper connecting rod between the two-phase of the suitable breaker double leval jib of elasticity respectively
The middle part at middle part and a wherein lower link, the first raker and the second raker just catch on connecting rod respectively；
2）The first pointer is adjusted to after coinciding with the second pointer, the first pointer is rotated a certain angle, digital display is turned round
The adaptor cup jointing of torque wrench rotates on interface, and interface drives shaft and driving gear to rotate, and driving gear is through rack drives the
One raker by top connecting rod toward drop-down, through the second raker of rack drives by lower link toward pull-up, the second pointer is same with interface
Step rotation records the reference torque value of torque-indicating wrench under the rotation angle to after being overlapped with the first pointer；
3）Repeat step（1）,（2）, the suitable breaker double leval jib of elasticity is acquired out respectively in the first different pointers
It rotates corresponding with reference to torque value under angle；
4）When needing to detect the elasticity of breaker double leval jib to be adjusted, adjustment driving gear is by the first raker and the
Two rakers vertically catch on respectively the wherein middle part of a upper connecting rod between the two-phase of breaker double leval jib to be adjusted with wherein
The middle part of a piece lower link, the first raker and the second raker just catch on connecting rod respectively；
5）The first pointer is adjusted to after coinciding with the second pointer, the rotation of the first pointer is any with reference to corresponding to torque value
Rotation angle value, the adaptor cup jointing of torque-indicating wrench is rotated on interface, interface drives shaft and driving gear to rotate,
Driving gear through the first raker of rack drives by top connecting rod toward drop-down, through the second raker of rack drives by lower link up
It drawing, the second pointer is rotated with interface synchronization to after being overlapped with the first pointer, the torque value of torque-indicating wrench at this time is observed, when
Torque value reference torque value corresponding with the rotation angle is identical or difference is in predetermined range value, then the breaker to be adjusted
The elasticity of two connecting rods of the double leval jib between the two-phase is suitable, refers to torque value not when torque value is corresponding with the rotation angle
It is identical or be more than predetermined range value when, then keep the position of torque-indicating wrench constant, at the same using spanner adjust top connecting rod,
The nut and then adjusting connecting rod at lower link both ends are elastic, and the torque value of torque-indicating wrench constantly changes in adjustment process,
When the torque value of torque-indicating wrench changes to or difference identical as torque value is referred in predetermined range value, this is to be adjusted
The elasticity of two connecting rods of the breaker double leval jib between the two-phase is adjusted to proper states；
6）Repeat step（4）,（5）, carry out the pine of two connecting rods between the other two-phase of breaker double leval jib to be adjusted
Tightness detection and adjusting.
Compared with prior art, the invention has the advantages that：The breaker double leval jib tightness degree detector
Structure is simple, and elasticity is adjusted intuitively, conveniently, and accommodation accuracy is high, high-efficient；It avoids and causes four because of the difference of manpower sense
The uncertainty and inaccuracy of connecting rod elasticity adjustment；Testing result has data, avoid the erroneous judgement of double leval jib elasticity and
Lead to the damage of component after breaker actuation.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the organigram one of the embodiment of the present invention.
Fig. 2 is the organigram two of the embodiment of the present invention.
Fig. 3 is the organigram three of the embodiment of the present invention.
Fig. 4 is the adjustment state schematic diagram of the first pointer of the embodiment of the present invention.
Fig. 5 is the organigram of the breaker double leval jib of the embodiment of the present invention.
In figure：1- body, the top 2- connecting rod, the first raker of 3-, first body of rod of 31-, the first recess portion of 32-, 4- lower link,
The second raker of 5-, second body of rod of 51-, the second recess portion of 52-, 6- rack gear, 7- driving gear, 8- interface, the first roller bearing of 9-, 10-
Two roller bearings, 11- angle dial, the first pointer of 12-, the second pointer of 13-, 14- connecting rod one, 15- connecting rod two, 16- connecting rod three,
17- connecting rod four, 18-A phase, 19-B phase, 20-C phase, 21- nut, 22- shaft.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
Carefully it is described as follows.
As shown in Figs. 1-5, a kind of breaker double leval jib tightness degree detector, including body 1 and torque-indicating wrench, institute
The inside for stating body is equipped with cavity, is equipped in the cavity to catch on 2 middle part of top connecting rod and toward the first raker 3 of drop-down,
It is additionally provided in the cavity to catch on 4 middle part of lower link and toward the second raker 5 of pull-up, first raker and second hooks
It is equipped with vertically extending rack gear 6 on bar, driving gear 7 is engaged between two rack gears, is connected at the axle center of the driving gear
There is the interface 8 to the adaptor cup jointing with torque-indicating wrench positioned at engine body exterior, in order to which torque-indicating wrench can be pulled
Dynamic driving gear is rotated.
In embodiments of the present invention, first raker includes the first vertically extending body of rod 31, first body of rod
Top be equipped with to vertically catch on top connecting rod the first recess portion 32, the first recess portion it is opening down, the first recess portion on toward
Under be caught in top connecting rod, the shape of the first recess portion is rectangle, and top connecting rod and the recess of the first recess portion are tangent.
In embodiments of the present invention, second raker includes the second vertically extending body of rod 51, second body of rod
Bottom is equipped with to the second recess portion 52 for vertically catching on lower link, the second recess portion it is opening up, the second recess portion from it is lower toward
On be caught in lower link, the shape of the second recess portion is rectangle, and the recess of lower link and the second recess portion is tangent.
In embodiments of the present invention, two rack gears are located in the adjacent side of first body of rod and second body of rod, and the cavity exists
Opposite flank positioned at the rack gear of first body of rod is equipped at least two the first roller bearings to guide the first raker to slide vertically
9, the cavity is equipped at least two to guide the second raker vertically to slide on the opposite flank of rack gear for being located at second body of rod
The second dynamic roller bearing 10, the face that first body of rod is in contact with the first roller bearing are the track of vertical plane, second body of rod and the second rolling
The face that axis is in contact is the track of vertical plane.
In embodiments of the present invention, the driving gear is set in cavity through shaft 22, the cross-sectional shape of the interface
For rectangle.
In embodiments of the present invention, circular angle is installed in the body vertical plane between the interface and body to carve
Scale 11, the angle dial are equipped with the first pointer 12, are additionally provided with to rotate synchronously with interface, shaft, driving gear
The second pointer 13.
In embodiments of the present invention, second pointer is fixedly connected with interface, to be rotated with interface synchronization, described
One pointer and angle dial are coaxially connected, and the first pointer is individually rotated.
In embodiments of the present invention, the design length of the rack gear is 10 ㎝, to meet the adjustment of double leval jib elasticity, institute
The material for stating body is metal.
A kind of detection method of breaker double leval jib tightness degree detector, carries out according to the following steps：
1）The acquisition that data are carried out using the suitable breaker double leval jib of elasticity, first adjusts driving gear, and first is hooked
Bar and the second raker vertically catch on wherein upper connecting rod between the two-phase of the suitable breaker double leval jib of elasticity respectively
The middle part at middle part and a wherein lower link, the first raker and the second raker just catch on connecting rod respectively；
2）The first pointer is adjusted to after coinciding with the second pointer, the first pointer is rotated a certain angle, digital display is turned round
The adaptor cup jointing of torque wrench rotates on interface, and interface drives shaft and driving gear to rotate, and driving gear is through rack drives the
One raker by top connecting rod toward drop-down, through the second raker of rack drives by lower link toward pull-up, the second pointer is same with interface
Step rotation records the reference torque value of torque-indicating wrench under the rotation angle to after being overlapped with the first pointer；
3）Repeat step（1）,（2）, the suitable breaker double leval jib of elasticity is acquired out respectively in the first different pointers
It rotates corresponding with reference to torque value under angle；
4）When needing to detect the elasticity of breaker double leval jib to be adjusted, adjustment driving gear is by the first raker and the
Two rakers vertically catch on respectively the wherein middle part of a upper connecting rod between the two-phase of breaker double leval jib to be adjusted with wherein
The middle part of a piece lower link, the first raker and the second raker just catch on connecting rod respectively；
5）The first pointer is adjusted to after coinciding with the second pointer, the rotation of the first pointer is any with reference to corresponding to torque value
Rotation angle value, the adaptor cup jointing of torque-indicating wrench is rotated on interface, interface drives shaft and driving gear to rotate,
Driving gear through the first raker of rack drives by top connecting rod toward drop-down, through the second raker of rack drives by lower link up
It drawing, the second pointer is rotated with interface synchronization to after being overlapped with the first pointer, the torque value of torque-indicating wrench at this time is observed, when
Torque value reference torque value corresponding with the rotation angle is identical or difference is in predetermined range value, then the breaker to be adjusted
The elasticity of two connecting rods of the double leval jib between the two-phase is suitable, refers to torque value not when torque value is corresponding with the rotation angle
It is identical or be more than predetermined range value when, then keep the position of torque-indicating wrench constant, at the same using spanner adjust top connecting rod,
The nut and then adjusting connecting rod at lower link both ends are elastic, and the torque value of torque-indicating wrench constantly changes in adjustment process,
When the torque value of torque-indicating wrench changes to or difference identical as torque value is referred in predetermined range value, this is to be adjusted
The elasticity of two connecting rods of the breaker double leval jib between the two-phase is adjusted to proper states；
6）Repeat step（4）,（5）, carry out the pine of two connecting rods between the other two-phase of breaker double leval jib to be adjusted
Tightness detection and adjusting.Using the device, the data of double leval jib elasticity, fortune also can record when workshop carries out breaker debugging
When being installed to substation field, elasticity can be directly adjusted according to the data of record, guarantee that number is debugged in scene and workshop
According to it is consistent, avoid mechanical property it is unqualified after multiple adjustment；There are the data of double leval jib elasticity, is debugged in breaker
If encountering problems during test, directly data can be inquired to determine whether being failure caused by double leval jib elasticity, so that
Test process has data can foundation and retrospect.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are each under the inspiration of the present invention
The breaker double leval jib tightness degree detector and its detection method of kind form.It is all done according to scope of the present invention patent it is equal
Deng variation and modification, it is all covered by the present invention.
Claims (3)
1. a kind of breaker double leval jib tightness degree detector, it is characterised in that：Including body and torque-indicating wrench, the machine
The inside of body is equipped with cavity, is equipped in the cavity to catch in the middle part of the connecting rod of top simultaneously toward the first raker of drop-down, the sky
It is additionally provided with the second raker to catch on lower link middle part and past pull-up in chamber, is all provided on first raker and the second raker
There is vertically extending rack gear, driving gear is engaged between two rack gears, is connected at the axle center of the driving gear positioned at body
The external interface to the adaptor cup jointing with torque-indicating wrench；First raker includes the first vertically extending body of rod,
The top of first body of rod is equipped with the first recess portion vertically to catch on top connecting rod；Second raker includes vertically prolonging
Second body of rod stretched, the bottom of second body of rod are equipped with the second recess portion vertically to catch on lower link；Two rack gear positions
In the adjacent side of first body of rod and second body of rod, the cavity is equipped on the opposite flank of rack gear for being located at first body of rod
At least two the first roller bearings to guide the first raker to slide vertically, the cavity are being located at the opposite of the rack gear of second body of rod
Side is equipped at least two the second roller bearings to guide the second raker to slide vertically；The driving gear is set to sky through shaft
In chamber, the cross-sectional shape of the interface is rectangle；Circle is installed in body vertical plane between the interface and body
Angle dial, the angle dial be equipped with the first pointer, be additionally provided with to synchronous with interface, shaft, driving gear
Second pointer of rotation；The detection method of the breaker double leval jib tightness degree detector carries out according to the following steps：
1）The acquisition that data are carried out using the suitable breaker double leval jib of elasticity, first adjusts driving gear, by the first raker with
Second raker vertically catches on the middle part of the wherein upper connecting rod between the two-phase of the suitable breaker double leval jib of elasticity respectively
With the middle part of a wherein lower link, the first raker and the second raker just catch on connecting rod respectively；
2）The first pointer is adjusted to after coinciding with the second pointer, the first pointer is rotated a certain angle, digital display torsion is pulled
The adaptor cup jointing of hand rotates on interface, and interface drives shaft and driving gear to rotate, and driving gear is hooked through rack drives first
Bar by top connecting rod toward drop-down, through the second raker of rack drives by lower link toward pull-up, the second pointer revolves with interface synchronization
It goes to after being overlapped with the first pointer, records the reference torque value of torque-indicating wrench under the rotation angle；
3）Repeat step（1）,（2）, the suitable breaker double leval jib of elasticity is acquired out respectively to be rotated in the first different pointers
It is corresponding under angle to refer to torque value；
4）When needing to detect the elasticity of breaker double leval jib to be adjusted, adjustment driving gear hooks the first raker and second
Bar vertically catches on the wherein middle part of a upper connecting rod and wherein one between the two-phase of breaker double leval jib to be adjusted respectively
The middle part of lower link, the first raker and the second raker just catch on connecting rod respectively；
5）The first pointer is adjusted to after coinciding with the second pointer, the first pointer is rotated into any rotation with reference to corresponding to torque value
Corner angle value rotates the adaptor cup jointing of torque-indicating wrench on interface, and interface drives shaft and driving gear to rotate, actively
Gear through the first raker of rack drives by top connecting rod toward drop-down, through the second raker of rack drives by lower link toward pull-up, the
Two pointers are rotated with interface synchronization to after being overlapped with the first pointer, are observed the torque value of torque-indicating wrench at this time, are worked as torsion
Value reference torque value corresponding with the rotation angle is identical or difference is in predetermined range value, then the breaker four to be adjusted connects
The elasticity of two connecting rods of the bar between the two-phase is suitable, when torque value is not corresponding with the rotation angle identical with reference to torque value
Or when being more than predetermined range value, then keep the position of torque-indicating wrench constant, while adjusting top connecting rod, lower section using spanner
The nut and then adjusting connecting rod of connecting rod two end are elastic, and the torque value of torque-indicating wrench constantly changes in adjustment process, works as number
When the torque value of aobvious torque spanner changes to or difference identical as torque value is referred in predetermined range value, the open circuit to be adjusted
The elasticity of two connecting rods of the device double leval jib between the two-phase is adjusted to proper states；
6）Repeat step（4）,（5）, carry out the elasticity of two connecting rods between the other two-phase of breaker double leval jib to be adjusted
Detection and adjusting.
2. breaker double leval jib tightness degree detector according to claim 1, it is characterised in that：Second pointer with
Interface is fixedly connected, and first pointer and angle dial are coaxially connected.
3. breaker double leval jib tightness degree detector according to claim 1, it is characterised in that：The design of the rack gear
Length is 10 ㎝, and the material of the body is metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610587537.1A CN106197817B (en) | 2016-07-25 | 2016-07-25 | Breaker double leval jib tightness degree detector and its detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610587537.1A CN106197817B (en) | 2016-07-25 | 2016-07-25 | Breaker double leval jib tightness degree detector and its detection method |
Publications (2)
| Publication Number | Publication Date |
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| CN106197817A CN106197817A (en) | 2016-12-07 |
| CN106197817B true CN106197817B (en) | 2018-11-27 |
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| CN201610587537.1A Active CN106197817B (en) | 2016-07-25 | 2016-07-25 | Breaker double leval jib tightness degree detector and its detection method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111809379A (en) * | 2020-07-21 | 2020-10-23 | 张�浩 | Method for detecting production quality of artificial leather |
| CN112123280A (en) * | 2020-10-12 | 2020-12-25 | 长春通视光电技术有限公司 | Adjustable thread pressing ring fastening mechanism |
| CN112650081B (en) * | 2020-11-27 | 2022-04-29 | 浙江海普发科技有限公司 | Intelligent circuit breaker with wiring safety analysis function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3329168C2 (en) * | 1982-08-18 | 1989-04-27 | Gkn Automotive Components Inc., Southfield, Mich., Us | |
| CN201555679U (en) * | 2009-10-30 | 2010-08-18 | 沈阳铁路局科学技术研究所 | Tension deviation measuring instrument of wire ropes |
| CN102607756A (en) * | 2012-03-27 | 2012-07-25 | 申龙电梯股份有限公司 | Elevator steel wire rope tension detection device |
| CN104359663A (en) * | 2014-11-12 | 2015-02-18 | 刘海林 | Mechanical life testing device for molded case circuit breakers |
| CN204165685U (en) * | 2014-09-24 | 2015-02-18 | 上海宝钢工业技术服务有限公司 | Coil of strip rolls the measurement mechanism of belt tightness degree |
-
2016
- 2016-07-25 CN CN201610587537.1A patent/CN106197817B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3329168C2 (en) * | 1982-08-18 | 1989-04-27 | Gkn Automotive Components Inc., Southfield, Mich., Us | |
| CN201555679U (en) * | 2009-10-30 | 2010-08-18 | 沈阳铁路局科学技术研究所 | Tension deviation measuring instrument of wire ropes |
| CN102607756A (en) * | 2012-03-27 | 2012-07-25 | 申龙电梯股份有限公司 | Elevator steel wire rope tension detection device |
| CN204165685U (en) * | 2014-09-24 | 2015-02-18 | 上海宝钢工业技术服务有限公司 | Coil of strip rolls the measurement mechanism of belt tightness degree |
| CN104359663A (en) * | 2014-11-12 | 2015-02-18 | 刘海林 | Mechanical life testing device for molded case circuit breakers |
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| Publication number | Publication date |
|---|---|
| CN106197817A (en) | 2016-12-07 |
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