CN114674221B - Quick eccentric detection device for enameled wire - Google Patents
Quick eccentric detection device for enameled wire Download PDFInfo
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- CN114674221B CN114674221B CN202210213302.1A CN202210213302A CN114674221B CN 114674221 B CN114674221 B CN 114674221B CN 202210213302 A CN202210213302 A CN 202210213302A CN 114674221 B CN114674221 B CN 114674221B
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- detection device
- enameled wire
- capacitor plates
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- enameled
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
- G01B7/31—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B7/312—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a quick eccentric detection device for enameled wires, wherein the enameled wires are arranged along a straight line; the detection device comprises: the device comprises a plurality of capacitor plates, a voltage recorder and a power supply, wherein the capacitor plates are respectively arranged along the periphery of an enameled wire, the distances from the inner walls of the capacitor plates to the peripheral wall of the enameled wire are equal, the capacitor plates, copper conductors in the enameled wire and the voltage recorder are respectively connected with the power supply, the voltage recorder records breakdown voltages of the capacitor plates, and the eccentric degree of a paint film of the enameled wire is judged through the range of the breakdown voltages. The method can achieve the effect of rapidly judging the eccentricity of the paint film by calculating the range and variance of the breakdown voltage.
Description
Technical Field
The invention relates to the technical field of enameled wire production and detection, in particular to a quick eccentric detection device for enameled wires.
Background
The enamelled wire with larger specification has thicker paint film thickness, and the prepared enamelled core has serious eccentricity due to the problems that the paint surface tension is difficult to overcome the paint gravity and the eccentricity is generated between the optical fiber and the die in the production process, and the electric performance of the enamelled wire is seriously influenced by the eccentric production, so that the enamelled wire is unqualified. To avoid reject products, it is necessary to perform an eccentric inspection of the finished enamel wire.
The traditional metallographic detection eccentric method has the defects of multiple steps (embedding, sample grinding, polishing, photographing and detecting), long time consumption and large influence of human errors, so that the production cost is seriously increased. Therefore, the design of the enameled wire eccentricity detection device with low cost, convenience and quickness is imperative.
Disclosure of Invention
Aiming at the problems existing in the existing eccentric detection of the enameled wire, the quick eccentric detection device for the enameled wire is low in cost, convenient and quick.
The specific technical scheme is as follows:
a fast eccentric detection device for enameled wires comprises: the enameled wires are arranged along a straight line;
the detection device includes: the device comprises a plurality of capacitor plates, a voltage recorder and a power supply, wherein the capacitor plates are respectively arranged along the periphery of an enameled wire, the distances from the inner walls of the capacitor plates to the peripheral walls of the enameled wire are equal, the capacitor plates, copper conductors in the enameled wire and the voltage recorder are respectively communicated with the power supply, the voltage recorder records breakdown voltages of the capacitor plates, and the eccentricity of a paint film of the enameled wire is judged through the range of the breakdown voltages.
The quick eccentric detection device for the enameled wire is characterized in that the inner side face of each capacitor plate is arc-shaped, the inner side faces of a plurality of capacitor plates are all positioned on the same cylindrical surface, and the cylindrical surface and the enameled wire are coaxially arranged.
The quick eccentric detection device for the enameled wire is characterized in that a plurality of capacitor plates are arranged at equal intervals along the periphery of the enameled wire.
The quick eccentric detection device for the enameled wire, wherein the detection device further comprises:
the two ends of the enameled wire are respectively fixed on the bracket;
the first fixing device is arranged on the support, and the capacitor plates are fixedly connected with the first fixing device.
The above-mentioned quick eccentric detection device is used to enameled wire, wherein, first fixer includes: the enamelled wire fixing device comprises a first fixing part and a plurality of first clamping assemblies, wherein the first clamping assemblies are respectively arranged on the first fixing part along the circumferential direction of the enamelled wire, the first clamping assemblies are respectively used for clamping the capacitor plates, and the capacitor plates are radially movable along the enamelled wire and used for adjusting the diameter of the cylindrical surface.
The quick eccentric detection device for the enameled wire, wherein each first clamping assembly comprises: the device comprises a first clamping jaw and a first telescopic rod, wherein one end of the first clamping jaw is slidably arranged on a first fixing portion, the other end of the first clamping jaw clamps the capacitor plate, the first telescopic rod is arranged in the first fixing portion, and the first telescopic rod drives the first clamping jaw to move along the radial direction of the enameled wire and is used for adjusting the diameter of the cylindrical surface.
The quick eccentric detection device for the enameled wire, wherein each first clamping assembly further comprises: the first graduated scale is arranged on one side of the first telescopic rod, and the first graduated scale is arranged along the radial direction of the enameled wire.
The quick eccentric detection device for the enameled wire, wherein the detection device further comprises: the two chucks are respectively arranged on the bracket in a rotating way, paint breaking nuts on the two chucks respectively clamp the two ends of the enameled wire, and the power supply is electrically connected with at least one chuck.
The above-mentioned enameled wire is with quick eccentric detection device, wherein, first fixer still includes: the first telescopic screw is arranged on the support, and the first fixer is arranged on the first telescopic screw.
The quick eccentric detection device for the enameled wire is characterized in that the clamping head, the capacitor plate, the power supply, the voltage recorder and the copper conductor in the enameled wire form a loop.
Compared with the prior art, the technical scheme has the following positive effects:
according to the invention, a loop is formed by the clamping head, the capacitor plates, the power supply, the voltage recorder and the copper conductor in the enameled wire, wherein a plurality of arc-shaped capacitor plates and the copper conductor form a plurality of capacitors, and the capacitor plates are mutually connected in parallel, so that the voltage on the capacitor plates can be kept consistent. Because the breakdown voltage of the capacitor plates is related to the distance between the capacitor plates and the medium filled between the capacitor plates, the larger the distance between the electrode plates is, the thicker the insulation between the electrode plates is, the higher the breakdown voltage is, so that the higher the breakdown voltage at the eccentric position of the eccentric enameled wire is, the lower the breakdown voltage is, the larger the breakdown voltage difference of the capacitor is caused, and the effect of rapidly judging the eccentric degree of the paint film can be achieved by calculating the range and the variance of the breakdown voltage.
Drawings
Fig. 1 is a schematic diagram showing a structure in which a varnish film of an enamel wire of a rapid eccentricity detection device for an enamel wire does not have significant eccentricity;
fig. 2 is a schematic diagram showing a structure in which a varnish film of an enamel wire of the fast eccentricity detection device for an enamel wire of the present invention is significantly eccentric;
fig. 3 is a schematic structural view of a rapid eccentricity detection device for enamel wire according to the present invention;
fig. 4 is a schematic structural view of a first fixture of the rapid eccentricity detection device for enamel wire according to the present invention;
fig. 5 is a schematic structural view of a first holder of the rapid eccentricity detection device for enamel wire according to the present invention;
fig. 6 is a schematic structural view of a rapid eccentricity detection device for enamel wire according to the present invention;
fig. 7 is a schematic structural view of a second holder of the rapid eccentricity detection device for enamel wire according to the present invention;
in the accompanying drawings: 1. a capacitive plate; 2. a voltage recorder; 3. a power supply; 4. enamelled wires; 5. a copper conductor; 6. a paint film; 7. a bracket; 8. a first holder; 9. a second holder; 10. a chuck; 11. a first fixing portion; 12. a first clamping assembly; 13. a first gripper jaw; 14. a first telescopic rod; 15. a first scale; 16. a first expansion screw; 21. a second fixed top; 22. a second clamping assembly; 23. a second gripper jaw; 24. a second telescopic rod; 25. a second scale; 26. a second expansion screw; 30. and (5) conducting wires.
Detailed Description
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Fig. 1 is a schematic view showing a structure in which a paint film of an enamel wire of a rapid eccentricity detection device for enamel wire of the present invention is not significantly eccentric, fig. 2 is a schematic view showing a structure in which a paint film of an enamel wire of a rapid eccentricity detection device for enamel wire of the present invention is significantly eccentric, fig. 3 is a schematic view showing a structure of a first holder of a rapid eccentricity detection device for enamel wire of the present invention, fig. 4 is a schematic view showing a structure of a first holder of a rapid eccentricity detection device for enamel wire of the present invention, fig. 6 is a schematic view showing a structure of a rapid eccentricity detection device for enamel wire of the present invention, fig. 7 is a schematic view showing a second holder of a rapid eccentricity detection device for enamel wire of the present invention, as shown in fig. 1 to 7, showing a rapid eccentricity detection device for enamel wire of a preferred embodiment, comprising: the enamel wire 4 is arranged in a straight line.
Preferably, the enamel wire 4 comprises a copper conductor 5 and a paint film 6 coated on the copper conductor 5.
Further, as a preferred embodiment, the detecting device includes: a plurality of electric capacity boards 1, voltage recorder 2 and power 3, a plurality of electric capacity boards 1 are arranged along the periphery of enameled wire 4 respectively, the inner wall of a plurality of electric capacity boards 1 is equal to the distance of the periphery wall of enameled wire 4, copper conductor 5 and voltage recorder 2 in a plurality of electric capacity boards 1, the enameled wire 4 switch on with power 3 respectively, voltage recorder 2 records the breakdown voltage of a plurality of electric capacity boards 1, judge the eccentric degree of paint film 6 of enameled wire 4 through the range of a plurality of breakdown voltages.
Further, as a preferred embodiment, the inner side surface of each capacitor plate 1 is arc-shaped, and the inner side surfaces of the capacitor plates 1 are all on the same cylindrical surface, and the cylindrical surface and the enameled wire 4 are coaxially arranged.
Further, as a preferred embodiment, a plurality of capacitor plates 1 are arranged at equal intervals along the outer circumference of the enamel wire 4.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the embodiments and the protection scope of the present invention.
The present invention has the following embodiments based on the above description:
in a further embodiment of the present invention, please continue to refer to fig. 1 to 7, the detecting device further includes: the two ends of the enameled wire 4 are respectively fixed on the bracket 7, the first fixer 8 is arranged on the bracket 7, and the capacitor plates 1 are fixedly connected with the first fixer 8.
In a further embodiment of the invention, the first holder 8 comprises: the first fixing part 11 and the first clamping components 12, the first clamping components 12 are respectively arranged on the first fixing part 11 along the circumferential direction of the enameled wire 4, and the first clamping components 12 respectively clamp the capacitor plates 1 and move along the radial direction of the enameled wire 4 for adjusting the diameter of the cylindrical surface.
In a further embodiment of the present invention, each first clamping assembly 12 comprises: the first clamping claw 13 and the first telescopic rod 14, the one end of first clamping claw 13 slides and locates on the first fixed part 11, and the other end centre gripping electric capacity board 1 of first clamping claw 13, and first telescopic rod 14 is located in the first fixed part 11, and the radial activity of first clamping claw 13 along enameled wire 4 is driven to first telescopic rod 14 for the diameter of adjusting the face of cylinder.
In a further embodiment of the present invention, each first clamping assembly 12 further comprises: the first graduated scale 15, one side of first telescopic link 14 is located to first graduated scale 15, and first graduated scale 15 sets up along the radial of enameled wire 4.
In a further embodiment of the present invention, the detection device further includes: the two chucks 10, the two chucks 10 are respectively rotatably arranged on the bracket 7, paint breaking nuts on the two chucks 10 respectively clamp two ends of the enameled wire 4, and the power supply 3 is electrically connected with at least one chuck 10.
Preferably, the cartridge 10 is provided with a paint breaking nut.
In a further embodiment of the invention, the first holder 8 further comprises: the first telescopic screw 16, the first telescopic screw 16 is arranged on the bracket 7, and the first fixer 8 is arranged on the first telescopic screw 16.
Preferably, as shown in the figure, the first telescopic screw 16 can horizontally adjust the position of the arc-shaped capacitor plate, so that the eccentric condition of different positions of the cored wire can be measured quickly and repeatedly, the capacitor plate 1 is connected with the power supply 3 in parallel, and the voltages of the four capacitor plates 1 are always consistent.
In a further embodiment of the invention, the clamping head 10, the capacitor plate 1, the power supply 3, the voltage recorder 2 and the copper conductor 5 in the enamelled wire 4 form a loop.
Preferably, the power supply 3 and the voltage recorder 2 are both arranged on the support 7.
Preferably, the material of the first holder 8 is a non-conductive material.
Preferably, the detection device further includes: the second fixing device 9 is arranged on the bracket 7, and the first fixing device 8 and the second fixing device 9 respectively clamp the two ends of the capacitor plates 1.
Preferably, the material of the second holder 9 is a non-conductive material.
Preferably, the second holder 9 comprises: the second fixing part 21 and the second clamping components 22, the second clamping components 22 are respectively arranged on the second fixing part 21 along the circumferential direction of the enameled wire 4, and the second clamping components 22 respectively clamp the other ends of the capacitor plates 1 and move along the radial direction of the enameled wire 4 for adjusting the diameter of the second cylindrical surface.
Preferably, each second clamping assembly 22 comprises: the second clamping claw 23 and the second telescopic rod 24, one end of the second clamping claw 23 is slidably arranged on the second fixing portion 21, the other end of the second clamping claw 23 clamps the other end of the capacitor plate 1, the second telescopic rod 24 is arranged in the second fixing portion 21, and the second telescopic rod 24 drives the second clamping claw 23 to move along the radial direction of the enameled wire 4 and is used for adjusting the diameter of the second cylindrical surface.
Preferably, each second clamping assembly 22 further comprises: the second graduated scale 25, the second graduated scale 25 is located one side of second telescopic link 24, and the second graduated scale 25 sets up along the radial of enameled wire 4.
Preferably, the second holder 8 further comprises: the second telescopic screw 26, the second telescopic screw 26 is arranged on the bracket 7, and the second fixer 8 is arranged on the second telescopic screw 26.
Preferably, as shown in the figure, the first telescopic screw 16 and the second telescopic screw 26 are matched with each other to horizontally adjust the positions of the arc-shaped capacitor plates, so that the eccentric conditions of different positions of the cored wire can be measured quickly and repeatedly, the capacitor plates 1 are connected with the power supply 3 in parallel, and the voltages of the four capacitor plates 1 are always consistent.
Preferably, because the capacitor plate 1 is fixed only at one end of the capacitor plate 1 due to its own weight, a certain inclination or shaking exists, which reduces the measurement accuracy, and the capacitor plate 1 located at the upper side of the enamel wire 4 has a first distance from the upper side of the enamel wire 4 when being inclined downwards, and the capacitor plate 1 located at the lower side of the enamel wire 4 has a second distance from the lower side of the enamel wire 4 when being inclined downwards, and the first distance is smaller than the second distance, which can lead to incapability of judging the eccentricity of the paint film; the two ends of the capacitor plates 1 are fixed by the first fixing device 8 and the second fixing device 9, so that the balance and stability of the whole capacitor plates 1 can be kept.
Preferably, the detection device further includes: the power supply 3 and the voltage recorder 2 are respectively connected with the controller (not shown in the figure) through signals.
Preferably, the plurality of first telescopic rods 14 and the plurality of second telescopic rods 24 are respectively connected with a controller in a signal manner, the plurality of first telescopic rods 14 and the plurality of second telescopic rods 24 are set to be automatic, and the driving distance of the first telescopic rods 14 and the driving distance of the second telescopic rods 24 are accurately controlled through the controller, so that each capacitor plate 1 can be kept balanced, and the detection precision is improved.
Preferably, the first holder 8 is symmetrically arranged with respect to the second holder 9.
Preferably, the first telescopic screw 16 and the second telescopic screw 26 are used for adapting the length of the capacitor plate 1, so that the installation is convenient.
Preferably, the first fixing device 8 is fixed with a plurality of arc-shaped capacitor plates 1, the capacitor plates 1 are respectively connected with the voltage recorder 2 through wires 30, the voltage recorder 2 is connected with the power supply 3 through wires 30, and the power supply 3 is connected with the clamping head 10 through wires 30.
As shown in fig. 1, when no significant eccentricity of the paint film 6 occurs, the distance between each capacitor plate 1 and the copper conductor 5 is as high, and the thickness of the paint film filled in the capacitor plate 1 is the same, and if other factors are not considered, the breakdown voltage of each capacitor is not greatly different, and the breakdown voltage data is extremely poor and the variance is small.
As shown in fig. 2, if the paint film 6 has a large eccentricity, the distances from the capacitor plate 1 to the copper conductor 5 will have a large difference, meanwhile, the paint film 6 filled in the capacitor plate 1 on the right side in fig. 2 is thickest, and the thickness of the paint film 6 and the increase of the distance will both increase the breakdown voltage, so that the higher the breakdown voltage at the thicker part of the eccentricity, the smaller the breakdown voltage at the thinner part of the eccentricity, and the larger the breakdown voltage of the capacitor on the right side, and the smaller the breakdown voltage of the capacitor plate 1 on the left side, so that the breakdown voltage data is extremely poor and the variance is larger.
The working process of the invention is as follows: after a section of enameled wire 4 passes through clamping heads 10 at two ends of a support, and after the enameled wire 4 is straightened, the clamping heads 10 are rotated to clamp the enameled wire 4 by using broken nuts at two ends of the clamping heads 10, a first fixer 8 is adjusted to adjust the capacitor plate 1 to a proper position apart from the enameled wire 4, and a voltage recorder 2 switch and a power supply 3 switch are turned on for the last time to record breakdown voltage data respectively. And after the experiment is finished, the first telescopic screw 16 is adjusted, the position of the capacitor plate 1 is adjusted, the steps are repeated to measure for a plurality of times, and finally, whether the enameled wire is eccentric or not is judged by comparing the breakdown voltage extreme value and the variance.
Wherein, the capacitor plate 1 is fixed at two ends thereof by a first fixer 8 and a second fixer 9 and then is adjusted to a proper position from the enameled wire 4.
According to the device, through the influence of the distance between the capacitor plates and the thickness of the enameled wire 4 between the capacitor plates 1 on the breakdown voltage of the capacitor plates 1, the eccentricity of the enameled wire can be estimated according to the breakdown voltage range and variance by recording the breakdown voltages of a plurality of positions of the enameled wire 4.
According to the invention, a loop is formed by the clamping head 10, the capacitor plates 1, the power supply 3, the voltage recorder 2 and the copper conductor 5 in the enameled wire 4, wherein a plurality of arc-shaped capacitor plates 1 and the copper conductor 5 form a plurality of capacitors, and the capacitor plates 1 are mutually connected in parallel, so that the voltage on the capacitor plates 1 can be kept consistent. The breakdown voltage of the capacitor plate 1 is related to the distance between the capacitor plates 1 and the medium filled between the capacitor plates 1, and the larger the distance between the electrode plates is, the thicker the insulation between the electrode plates is, the higher the breakdown voltage is, so that the higher the breakdown voltage at the eccentric position of the eccentric enameled wire 4 is, the lower the breakdown voltage is, the larger the breakdown voltage phase difference of the capacitor is caused, and the effect of rapidly judging the eccentricity of a paint film can be achieved by calculating the range and the variance of the breakdown voltage.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. The quick eccentric detection device for the enameled wires is characterized in that the enameled wires are arranged along a straight line;
the detection device includes: the capacitor plates are respectively arranged along the periphery of the enameled wire, the distances from the inner walls of the capacitor plates to the peripheral wall of the enameled wire are equal, the capacitor plates, copper conductors in the enameled wire and the voltage recorder are respectively communicated with the power supply, the voltage recorder records breakdown voltages of the capacitor plates, and the eccentricity of a paint film of the enameled wire is judged through the range of the breakdown voltages;
the detection device further includes: the paint breaking nuts on the two clamping heads respectively clamp the two ends of the enameled wire, and the power supply is electrically connected with at least one clamping head;
the clamping head, the capacitor plate, the power supply, the voltage recorder and the copper conductor in the enameled wire form a loop.
2. The rapid eccentricity detection device for enameled wires according to claim 1 wherein the inner side surfaces of each capacitor plate are arc-shaped, and the inner side surfaces of a plurality of capacitor plates are positioned on the same cylindrical surface, and the cylindrical surface and the enameled wires are coaxially arranged.
3. The rapid eccentricity detection device for enamel wire according to claim 2, wherein the plurality of capacitor plates are arranged at equal intervals along the outer circumference of the enamel wire.
4. The rapid eccentricity detection device for enamel wires according to claim 3, further comprising:
the two ends of the enameled wire are respectively fixed on the bracket;
the first fixing device is arranged on the support, and the capacitor plates are fixedly connected with the first fixing device.
5. The rapid eccentricity detection device for enamel wires according to claim 4, wherein the first holder comprises: the enamelled wire fixing device comprises a first fixing part and a plurality of first clamping assemblies, wherein the first clamping assemblies are respectively arranged on the first fixing part along the circumferential direction of the enamelled wire, and the first clamping assemblies are respectively used for clamping the capacitor plates and radially moving along the enamelled wire and used for adjusting the diameter of the cylindrical surface.
6. The rapid eccentricity detection device for use with enamel wires according to claim 5, wherein each of the first clamping assemblies comprises: the device comprises a first clamping jaw and a first telescopic rod, wherein one end of the first clamping jaw is slidably arranged on a first fixing portion, the other end of the first clamping jaw clamps the capacitor plate, the first telescopic rod is arranged in the first fixing portion, and the first telescopic rod drives the first clamping jaw to move along the radial direction of the enameled wire and is used for adjusting the diameter of the cylindrical surface.
7. The rapid eccentricity detection device for use with enamel wires according to claim 6, wherein each of the first clamping assemblies further comprises: the first graduated scale is arranged on one side of the first telescopic rod, and the first graduated scale is arranged along the radial direction of the enameled wire.
8. The rapid eccentricity detection device for enamel wires according to claim 7, wherein the two chucks are rotatably provided on the bracket, respectively.
9. The rapid eccentricity detection device for enamel wires according to claim 8, wherein the first holder further comprises: the first telescopic screw is arranged on the support, and the first fixer is arranged on the first telescopic screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213302.1A CN114674221B (en) | 2022-03-01 | 2022-03-01 | Quick eccentric detection device for enameled wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213302.1A CN114674221B (en) | 2022-03-01 | 2022-03-01 | Quick eccentric detection device for enameled wire |
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| CN114674221A CN114674221A (en) | 2022-06-28 |
| CN114674221B true CN114674221B (en) | 2023-08-25 |
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| CN202210213302.1A Active CN114674221B (en) | 2022-03-01 | 2022-03-01 | Quick eccentric detection device for enameled wire |
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| CN117073517B (en) * | 2023-10-17 | 2023-12-29 | 普瑞奇科技（北京）股份有限公司 | Valve control assembly test equipment of vacuum oil filter |
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