CN108572065B - Over-travel detection device and method for circuit breaker - Google Patents
Over-travel detection device and method for circuit breaker Download PDFInfo
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- CN108572065B CN108572065B CN201710147948.3A CN201710147948A CN108572065B CN 108572065 B CN108572065 B CN 108572065B CN 201710147948 A CN201710147948 A CN 201710147948A CN 108572065 B CN108572065 B CN 108572065B
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title description 9
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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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- 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
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
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Abstract
The invention relates to the technical field of breaker detection, in particular to a breaker over-travel detection device and a detection method; the over-travel detection device of the circuit breaker of the invention comprises: the circuit breaker comprises a stirring structure for driving a breaker handle to rotate from an opening direction to a closing direction, a torsion sensor connected with the stirring structure, a rotary power source connected with the torsion sensor and used for driving the stirring structure to rotate, a control unit connected with the rotary power source and the torsion sensor, and a power supply mechanism connected with the control unit; the over-travel detection device and the over-travel detection method for the circuit breaker are simple in operation, high in detection efficiency and accurate in detection result.
Description
Technical Field
The invention relates to the technical field of circuit breaker detection, in particular to a circuit breaker over-travel detection device and a detection method.
Background
At present, the over-travel detection process of the miniature circuit breaker is to manually sample and detect, the shell of a product must be destroyed firstly, and the manual detection is carried out by using measuring tools such as calipers, and the like, so that the measuring mode is complex, the measuring data is not accurate enough, and the detection efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a circuit breaker over-travel detection device and a detection method which are simple to operate, high in detection efficiency and accurate in detection result.
A circuit breaker over travel detection apparatus, comprising: the circuit breaker handle is used for driving the circuit breaker handle to rotate from an opening direction to a closing direction, the torsion sensor 24 is connected with the toggle structure, the rotary power source is connected with the torsion sensor 24 and used for driving the toggle structure to rotate, the control unit is connected with the rotary power source and the torsion sensor 24, and the circuit breaker handle further comprises a power supply mechanism connected with the control unit.
Preferably, the stirring structure comprises a rotating rod 28 connected with a handle of the circuit breaker in an inserted mode, a rotating rod connecting seat 27 connected with the rotating rod 28 and a transmission shaft 26 connected with the rotating rod connecting seat 27, and the transmission shaft 26 drives the rotating rod 28 to do circular motion by taking the transmission shaft 26 as an axis.
Preferably, the rotating rod coupling seat 27 includes a rotating rod mounting hole 271 provided at one end thereof and a driving shaft mounting hole 272 provided at the other end of the rotating rod coupling seat 27.
Preferably, a rotating rod fixing hole 2710 is provided at one side of the rotating rod mounting hole 271 to be communicated therewith.
Preferably, a first rectangular recess 273 is formed at one side of the shaft mounting hole, and a shaft fixing hole 2720 communicated with the first rectangular recess 273 is formed at one side of the first rectangular recess 273; the lower end of the transmission shaft 26 is provided with a second rectangular groove matched with the first rectangular groove 273, and the first transmission shaft fixing part is arranged in the first rectangular groove 273 and the second rectangular groove.
Preferably, the device further comprises a detection device bracket 1 and a lifting structure arranged on the upper part of the detection device bracket 1 and used for driving the stirring structure to move up and down.
Preferably, the lifting structure comprises a lifting power source 41 and a transmission structure connected with the lifting power source 41, the transmission structure comprises a transmission piece 42 connected with the lifting power source 41 and a connecting plate 43 fixedly connected with the transmission piece 42 and slidingly connected with the detection device bracket 1 on one side, the lower end of the connecting plate 43 is connected with the transmission shaft 26, and the upper end of the connecting plate is fixedly connected with the reduction gearbox 22 of the rotary power source.
Preferably, the torsion sensor 24 is provided with a positioning metal sheet 32 matched with the photoelectric sensor 31 above, and the photoelectric sensor 31 is connected with the control unit.
Preferably, the photoelectric sensor 31 is a groove-type photoelectric sensor, and the positioning metal sheet 32 is in a ring-shaped structure, and is provided with a positioning notch matched with the photoelectric sensor 31 for use.
A method for detecting the over-travel of a circuit breaker comprises the following steps:
(1) Adjusting a handle of the circuit breaker to be tested to an off state, and connecting a wiring terminal of the circuit breaker to be tested;
(2) The rotary power source drives the handle of the miniature circuit breaker to rotate from the opening direction to the closing direction, and synchronously detects the torsion value until the moving contact and the fixed contact of the circuit breaker are conducted, the rotation angle value is recorded from the moment of conducting the moving contact and the fixed contact, and the rotation angle value when the moving contact and the fixed contact are conducted is the over-travel origin of the circuit breaker;
(3) Continuing to rotate the breaker handle until a torque peak value is detected, stopping rotating the breaker handle, and recording a rotation angle value when the torque peak value is recorded;
(4) And calculating an angle difference value between the rotation angle value when the torque peak value is calculated and the rotation angle value when the movable contact and the fixed contact of the circuit breaker are conducted, and obtaining the over-travel value of the circuit breaker through conversion.
The rotating power source of the over-travel detection device of the circuit breaker drives the handle of the circuit breaker to rotate from the opening to the closing direction through the toggle structure, the torsion sensor detects torsion data and transmits the data to the control unit, and the control unit analyzes the torsion data to obtain the over-travel value of the circuit breaker. In addition, the lifting structure is used for driving the stirring structure to move up and down, so that the rotating rod of the stirring structure is matched with the handle of the circuit breaker, and convenience is provided for the over-travel detection operation of the circuit breaker; the transmission shaft mounting hole one side sets up first rectangle recess, transmission shaft lower extreme set up with first rectangle recess complex second rectangle recess, first rectangle recess one side sets up the transmission shaft fixed orifices, sets up first transmission shaft mounting in first rectangle recess and the second rectangle recess, realizes the fixed of transmission shaft and rotatory excellent connecting seat through above-mentioned structure, simple structure and easy and simple to handle. According to the detection method, the over-travel value is detected through torque detection, the operation is simple, and the over-travel value of the circuit breaker can be accurately measured without damaging or opening the shell of the circuit breaker.
Drawings
FIG. 1 is a schematic diagram of a circuit breaker over-travel detection apparatus according to the present invention;
FIG. 2 is a schematic view of a rotary rod connection base according to the present invention;
FIG. 3 is a schematic view of another construction of the over-travel detection apparatus of the circuit breaker of the present invention;
FIG. 4 is a schematic diagram of the structure of section I of FIG. 3 in accordance with the present invention;
fig. 5 is a graph of the over travel detection torque of the circuit breaker of the present invention.
Detailed Description
Embodiments of the over-travel detection apparatus for a circuit breaker according to the present invention are further described below with reference to the examples shown in fig. 1 to 5. The over-travel detection apparatus of a circuit breaker of the present invention is not limited to the description of the following embodiments.
The invention relates to a circuit breaker over-travel detection device which comprises a toggle structure for driving a circuit breaker handle to rotate from an opening direction to a closing direction, a torsion sensor 24 connected with the toggle structure, a rotary power source connected with the torsion sensor 24 and used for driving the toggle structure to rotate, a control unit connected with the rotary power source and the torsion sensor 24, and a power supply mechanism connected with the control unit and used for powering on the circuit breaker. At present, the process for detecting the over-travel of the miniature circuit breaker needs to destroy or open the miniature circuit breaker shell and perform manual measurement, and has the advantages of complex operation, low detection efficiency and poor detection precision. The small-sized breaker detection device comprises a stirring structure, a torsion sensor and a rotary power source, wherein the rotary power source drives a handle of the small-sized breaker to rotate through the stirring structure when the small-sized breaker is powered on and is in a disconnection state, the torsion sensor detects torsion data in real time and transmits the torsion data to a control unit, and the control unit analyzes the torsion data and obtains an over-travel value of the small-sized breaker.
As shown in fig. 1 and 3, the miniature circuit breaker over-travel detection device of the present invention comprises a detection device bracket 1, a servo motor 21, a reduction gearbox 22, a first coupler 23, a torsion sensor 24, a second coupler 25, a transmission shaft 26, a rotating rod connecting seat 27 and a rotating rod 28 which are arranged on the right side of the detection device bracket 1 and are sequentially connected from top to bottom; the torque sensor 24 and the servo motor 21 are both connected to a control unit. The power supply mechanism is connected with the control unit and is used for providing a conduction signal of the moving contact and the fixed contact of the miniature circuit breaker. The rotary power source comprises a servo motor 21, and can be other devices for providing rotary power sources; a reduction gearbox 22 is also preferably provided.
The rotating rod coupling block 27 includes a rotating rod mounting hole 271 provided at a left end thereof and a driving shaft mounting hole 272 provided at a right end of the rotating rod coupling block 27, as shown in the direction of fig. 2.
Preferably, the rotating rod 28 is screwed with the rotating rod mounting hole 271.
Preferably, as shown in fig. 2, a rotating rod fixing hole 2710 is provided on one side of the rotating rod mounting hole 271, and a rotating rod pressing member for pressing the rotating rod 28 is provided in the rotating rod fixing hole 2710.
Preferably, as shown in fig. 2, a first rectangular recess 273 is disposed on one side of the shaft mounting hole 272 and is communicated with the first rectangular recess 273, a shaft fixing hole 2720 is disposed on one side of the first rectangular recess 273 and is communicated with the first rectangular recess 273, a second rectangular recess is disposed at the lower end of the shaft 26 and is matched with the first rectangular recess 273, first shaft fixing members are disposed in the first rectangular recess 273 and the second rectangular recess, second shaft fixing members are disposed in the shaft fixing hole 2720, and the shaft 26 is pressed by the first shaft fixing members, so that the shaft 26 is prevented from rotating in the shaft mounting hole 272 or falling off from the shaft mounting hole. Of course, the driving shaft 26 may be connected to the rotating rod connecting seat 27 in other manners, for example, the lower end of the driving shaft 26 is square, the driving shaft mounting hole 273 is a square hole matched with the lower end of the driving shaft 26, the second driving shaft fixing member compresses the driving shaft 26 through the driving shaft fixing hole 2720, and the driving shaft 26 may be prevented from rotating in the driving shaft mounting hole 272 or falling off therefrom; therefore, the connection between the drive shaft 26 and the drive shaft mounting hole 272 is sufficient to avoid the drive shaft 26 from rotating in and falling out of the drive shaft mounting hole 272.
Preferably, as shown in fig. 1 and 2, the small-sized circuit breaker over-travel detecting device of the present invention further includes a detecting device bracket 1 and a lifting structure provided at an upper portion of the detecting device bracket 1. The lifting structure comprises a lifting power source 41 arranged on the left side of the detection device support 1 and fixedly connected with the lifting power source 41 and a transmission structure connected with the lifting power source 41, the transmission structure comprises a transmission piece 42 connected with the lifting power source and a connecting plate 43 fixedly connected with the transmission piece 42 and slidingly connected with the detection device support 1, the upper end and the lower end of the connecting plate 43 are respectively provided with a supporting plate 44, the supporting plates 44 at the upper end are connected with the reduction gearbox 22, and the supporting plates 44 at the lower end are connected with the transmission shaft 26.
Preferably, as shown in fig. 1, a sliding rail is disposed on one side of the upper portion of the detection device support 1, and a slider matched with the sliding rail is disposed on one side of the connecting plate 43. Of course, the sliding rail and the sliding piece can also be interchanged, namely, the sliding piece is arranged on one side of the upper part of the detection device bracket 1, and the sliding rail matched with the sliding piece is arranged on one side of the connecting plate 43.
Preferably, as shown in fig. 4, a photoelectric sensor 31 connected to the control unit is disposed on one side of the connection board 43, the photoelectric sensor 31 is a groove type photoelectric sensor, a positioning metal sheet 32 matched with the photoelectric sensor 31 is disposed between the torsion sensor 24 and the first coupling 23, the positioning metal sheet 32 is fixedly connected with the output shaft of the reduction gearbox 22, the positioning metal sheet 32 is in a ring structure, and a positioning notch matched with the photoelectric sensor 31 is disposed. When the servo motor 21 works, the positioning metal sheet 32 is driven to rotate through the reduction gearbox 22, the poking structure also rotates along with the positioning metal sheet 32, when a positioning notch of the positioning metal sheet 32 passes through a groove of the photoelectric sensor 31, the photoelectric sensor 31 feeds back a signal to the control unit, and the position is the origin of the servo motor 21, namely the zero position of the rotating rod 28 of the poking structure; when the rotary rod 28 is in the zero position, the lifting structure acts to enable the rotary rod 28 to move downwards to match the rotary rod 28 with the handle of the miniature circuit breaker, so that the degree of automation of the over-travel detection device of the miniature circuit breaker is further improved. The control unit is a PLC controller or a PC and other control devices. Preferably, the control unit is a PLC controller, the PLC controller is connected with the servo motor 21, the power supply mechanism and the lifting power source 41, and the torsion sensor 24 is connected with the PLC controller or a PC.
The invention also provides a method for detecting the over-travel of the circuit breaker, which comprises the following steps:
(1) Adjusting a handle of the circuit breaker to be tested to an off state, and connecting a wiring terminal of the circuit breaker to be tested;
(2) The rotary power source drives the handle of the miniature circuit breaker to rotate from the opening direction to the closing direction, and synchronously detects the torsion value until the moving contact and the fixed contact of the circuit breaker are conducted, the rotation angle value is recorded from the moment of conducting the moving contact and the fixed contact, and the rotation angle value when the moving contact and the fixed contact are conducted is the over-travel origin of the circuit breaker;
(3) Continuing to rotate the breaker handle until a torque peak value is detected, stopping rotating the breaker handle, and recording a rotation angle value when the torque peak value is recorded;
(4) And calculating an angle difference value between the rotation angle value when the torque peak value is calculated and the rotation angle value when the movable contact and the fixed contact of the circuit breaker are conducted, and obtaining the over-travel value of the circuit breaker through conversion.
According to the detection method, the over-travel value is detected through torque detection, the operation is simple, and the over-travel value of the circuit breaker can be accurately measured without damaging or opening the shell of the circuit breaker. The method for detecting the over-travel of the miniature circuit breaker according to the invention will be described in detail in connection with the working process of the over-travel detection device of the miniature circuit breaker according to the invention:
(1) The photoelectric sensor 31, the positioning metal sheet 32, the servo motor 21 and the control unit are matched to realize zero point positioning of the rotating rod 28;
(2) Placing a miniature circuit breaker in an open state below a toggle mechanism of the miniature circuit breaker over-travel detection device, and connecting two wiring terminals of the miniature circuit breaker with a power supply mechanism;
(3) The control unit controls the lifting structure to act, and the rotating rod 28 with the zero position moves downwards to be spliced with the handle of the miniature circuit breaker;
(4) The control unit controls the servo motor 21 to act, the handle of the miniature circuit breaker is driven to rotate from the opening direction to the closing direction by the rotating rod 28, the power supply mechanism feeds back a moving contact conduction signal to the control unit until the moving contact of the miniature circuit breaker is closed, the control unit controls the servo motor 21 to act temporarily, the control unit starts to record the rotating angle value of the servo motor, namely the rotating rod 28, and the starting value is the over-travel origin of the miniature circuit breaker;
(5) The control unit controls the servo motor 21 to continue to act, the handle of the miniature circuit breaker is continuously driven to rotate through the rotary rod 28, the torsion sensor 24 detects the torsion value in real time and feeds back a torsion value signal to the control unit, when the torsion sensor 24 detects the peak value of the torsion value, the control unit controls the servo motor 21 to stop acting, and the control unit records the rotation angle value of the rotary rod when the torsion peak value is recorded;
(6) The control unit analyzes the torque value curve detected by the torque sensor 24 and the dimensional difference between the rotation angle value of the rotation rod when the torque peak value and the rotation angle value of the rotation rod when the moving contact and the fixed contact of the small circuit breaker start to be conducted (namely, the overtravel origin of the small circuit breaker), and can obtain the servo overtravel stroke (the rotation distance of the rotation rod between the conduction of the moving contact and the fixed contact to the peak value of the force), and when the torque sensor and the small circuit breaker handle do synchronous circular motion, the small circuit breaker handle drives the moving contact to act through the operating mechanism of the small circuit breaker, so that the closing of the moving contact and the fixed contact is realized, and the overtravel value of the small circuit breaker can be obtained based on the corresponding relation between the servo overtravel stroke and the rotation stroke of the moving contact of the small circuit breaker (the corresponding relation between the rotation radius and the angle of the moving contact). During calculation, the over-travel of the servo can be obtained based on the rotation angle of the servo motor, and then the over-travel value of the miniature circuit breaker is obtained based on the corresponding relation; the over-travel rotation angle of the moving contact can be obtained based on the rotation angle of the servo motor, and then the over-travel value of the miniature circuit breaker is calculated based on the rotation radius of the moving contact.
As shown in fig. 5, in the torsion curve diagram for detecting the over-travel of the miniature circuit breaker, a torsion force value curve from the beginning of rotation of the miniature circuit breaker handle to the conduction of the moving contact until the successful closing of the torsion sensor 24 is recorded, and the area from the conduction of the moving contact (1.5 s) to the completion of the closing process (4.0 s) is the over-travel area of the miniature circuit breaker. The over-travel value of the miniature circuit breaker is 15% of the servo over-travel (different conversion coefficients for different circuit breakers), the converted over-travel value of the miniature circuit breaker is compared with a preset threshold value, and the miniature circuit breaker is qualified in the threshold value range, or is unqualified.
Table one: three miniature breaker over-travel value conversion examples
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. An over-travel detection device for a circuit breaker, characterized in that it comprises: the circuit breaker comprises a stirring structure for driving a breaker handle to rotate from an opening direction to a closing direction, a torsion sensor (24) connected with the stirring structure, a rotary power source connected with the torsion sensor (24) and used for driving the stirring structure to rotate, a control unit connected with the rotary power source and the torsion sensor (24), and a power supply mechanism connected with the control unit;
During detection, the circuit breaker is in an open state and the wiring terminal is connected with electricity through the power supply mechanism, the control unit drives the circuit breaker handle to rotate from the open direction to the closed direction through the rotary power source and the stirring structure, the torsion sensor (24) synchronously monitors the torsion value, the control unit records the rotation angle value from the conduction moment of the movable contact of the circuit breaker, the rotation angle value when the movable contact is conducted is the over-travel origin of the circuit breaker, the control unit records the rotation angle value when the torsion peak value, the difference value between the rotation angle value when the torsion peak value and the rotation angle value when the movable contact of the circuit breaker is conducted is calculated, and the over-travel value of the circuit breaker can be obtained through conversion.
2. The circuit breaker over-travel detection apparatus of claim 1, wherein: the stirring structure comprises a rotating rod (28) connected with a handle of the circuit breaker in an inserted mode, a rotating rod connecting seat (27) connected with the rotating rod (28) and a transmission shaft (26) connected with the rotating rod connecting seat (27), and the transmission shaft (26) drives the rotating rod (28) to do circular motion by taking the transmission shaft (26) as an axis.
3. The circuit breaker over-travel detection apparatus of claim 2, wherein: the rotating rod connecting seat (27) comprises a rotating rod mounting hole (271) arranged at one end of the rotating rod connecting seat and a transmission shaft mounting hole (272) arranged at the other end of the rotating rod connecting seat (27).
4. The over-travel detection apparatus of a circuit breaker according to claim 3, wherein: a rotary rod fixing hole (2710) is formed in one side of the rotary rod mounting hole (271) and communicated with the rotary rod mounting hole.
5. The over-travel detection apparatus of a circuit breaker according to claim 3, wherein: a first rectangular groove (273) is formed in one side of the transmission shaft mounting hole, and a transmission shaft fixing hole (2720) communicated with the first rectangular groove (273) is formed in one side of the first rectangular groove; the lower end of the transmission shaft (26) is provided with a second rectangular groove matched with the first rectangular groove (273), and first transmission shaft fixing parts are arranged in the first rectangular groove (273) and the second rectangular groove.
6. The circuit breaker over-travel detection apparatus of claim 1, wherein: the device also comprises a detection device bracket (1) and a lifting structure which is arranged on the upper part of the detection device bracket (1) and used for driving the stirring structure to move up and down.
7. The circuit breaker over-travel detection apparatus of claim 6, wherein: the lifting structure comprises a lifting power source (41) and a transmission structure connected with the lifting power source (41), the transmission structure comprises a transmission part (42) connected with the lifting power source (41) and a connecting plate (43) fixedly connected with the transmission part (42) and one side of which is in sliding connection with the detection device bracket (1), the lower end of the connecting plate (43) is connected with the transmission shaft (26), and the upper end of the connecting plate is fixedly connected with a reduction gearbox (22) of the rotary power source.
8. The circuit breaker over-travel detection apparatus of claim 1, wherein: the torsion sensor (24) is provided with a positioning metal sheet (32) matched with the photoelectric sensor (31) for use.
9. The circuit breaker over-travel detection apparatus of claim 8, wherein: the photoelectric sensor (31) is a groove-type photoelectric sensor, the positioning metal sheet (32) is of an annular structure, and a positioning notch matched with the photoelectric sensor (31) is arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710147948.3A CN108572065B (en) | 2017-03-13 | 2017-03-13 | Over-travel detection device and method for circuit breaker |
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| CN201710147948.3A CN108572065B (en) | 2017-03-13 | 2017-03-13 | Over-travel detection device and method for circuit breaker |
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| CN108572065A CN108572065A (en) | 2018-09-25 |
| CN108572065B true CN108572065B (en) | 2024-06-07 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670135B (en) * | 2020-11-26 | 2022-08-19 | 国家电网有限公司 | Coupler and circuit breaker |
| CN112710264B (en) * | 2020-12-14 | 2023-01-31 | 平高集团有限公司 | Circuit breaker overstroke measuring device and circuit breaker overstroke measuring system |
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| CN108572065A (en) | 2018-09-25 |
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