High voltage contactor testing device and testing method

Abstract

This invention discloses a high-voltage contactor testing device and method. The positioning mechanism includes a positioning base with an electromagnetic coil mounted on it. When energized, the electromagnetic coil generates a magnetic field that acts on the stationary and moving iron cores. The conduction mechanism includes a support assembly, a drive cylinder, and a probe. The drive cylinder is mounted on the support assembly, and the probe is positioned at the output end of the drive cylinder. The probe is driven to act on the stationary contact of the high-voltage contactor. The testing mechanism includes a servo module, a pressure sensor, a connecting post, and a grating ruler. The pressure sensor is mounted on the servo module, and the connecting post is mounted on the pressure sensor. The connecting post is driven to extend into the central hole of the electromagnetic coil and abut against the lower end of the moving iron core. The grating ruler measures the movement distance of the output end of the servo module. This invention eliminates manual intervention during the testing process, accurately measures and calculates relevant data (including contact pressure, breaking overtravel, etc.), and improves measurement stability.

Description

Technical Field

[0001] This invention relates to the field of high-voltage contactor testing technology, and in particular to a high-voltage contactor testing device and testing method. Background Technology

[0002] A high-voltage contactor is an electromagnetic switching device used to control the switching on and off of high-voltage circuits. It is widely used in power systems, industrial automation, new energy, and other fields. Its core function is to connect or disconnect large-capacity main circuits over long distances and frequently, making it particularly suitable for scenarios requiring high reliability, long lifespan, and frequent operation.

[0003] High-voltage contactors require testing of relevant data, such as contact pressure, return force, and breaking overtravel. In existing technology, high-voltage contactors are divided into moving and stationary components. Manual testing of these parameters suffers from poor stability, and the product's performance parameters cannot be accurately reflected. Summary of the Invention

[0004] The purpose of this invention is to provide a high-voltage contactor testing device and testing method that eliminates manual intervention during the testing process and solves the problem of poor pressure and displacement accuracy. It can accurately measure and calculate relevant data (including contact pressure, breaking overtravel, etc.) and improves the stability of the measurement.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a high-voltage contactor testing device, comprising a base and a component disposed on the base:

[0006] A positioning mechanism includes at least a positioning seat for placing a high-voltage contactor. The positioning seat is equipped with an electromagnetic coil. A central hole in the electromagnetic coil accommodates the stationary and moving iron cores of the high-voltage contactor. When energized, the electromagnetic coil generates a magnetic field that acts on the stationary and moving iron cores.

[0007] The conducting mechanism includes a support assembly, a drive cylinder, and probes. The drive cylinder is mounted on the support assembly, and a pair of probes are located at the output end of the drive cylinder. The pair of probes are driven to act on the stationary contacts of the high-voltage contactor.

[0008] The testing mechanism includes a servo module, a pressure sensor, a connecting post, and a grating ruler. The pressure sensor is mounted on the servo module, and the connecting post is mounted on the pressure sensor. The connecting post is driven to extend into the central hole of the electromagnetic coil and abut against the lower end of the moving iron core. The grating ruler is used to measure the movement distance of the output end of the servo module.

[0009] As a further optimization, the positioning mechanism also includes a push assembly, a pair of which are symmetrically arranged on opposite sides of the positioning seat for clamping the high-voltage contactor.

[0010] As a further optimization, the jacking assembly includes a jacking cylinder disposed on the base and a top block disposed at the output end of the jacking cylinder.

[0011] As a further optimization, the positioning mechanism also includes a spinning assembly, which is disposed on the side of the positioning seat and is used to press the high-voltage contactor.

[0012] As a further optimization, the spinning assembly includes a lifting cylinder and a pressure block. The middle part of the pressure block is hinged to the base. The lifting cylinder is disposed on the base, and its output end is hinged to the end of the pressure block. A pair of spinning assemblies are provided symmetrically.

[0013] As a further optimization, the positioning mechanism also includes a material arrival sensor.

[0014] As a further optimization, the support assembly includes a translation module and a mounting plate disposed on the translation module; the drive cylinder is disposed on the mounting plate.

[0015] As a further optimization, the high-voltage contactor testing device also includes a laser rangefinder, which is mounted on the mounting plate.

[0016] The present invention also provides a high-voltage contactor testing method, which uses the above-mentioned high-voltage contactor testing device for testing, and the testing method includes the following steps:

[0017] S1) Place the high-voltage contactor on the positioning mechanism so that the stationary iron core and the moving iron core on the high-voltage contactor extend into the center hole of the electromagnetic coil;

[0018] S2) When the electromagnetic coil is energized, the moving iron core and the stationary iron core come into contact under the action of the magnetic field, and the moving contact of the high-voltage contactor comes into contact with the stationary contact.

[0019] S3) The probe is driven to abut against the upper end of the stationary contact; the servo module drives the connecting post to move upward and abut against the lower end of the moving iron core for pre-compression;

[0020] S4) When the electromagnetic coil is de-energized, record the force value F1 fed back by the pressure sensor and record the position value X1 of the servo module using a grating ruler; the servo module drives the connecting column to move down slowly, and record the force values ​​F2 and F3 fed back by the pressure sensor. F2 is the force value fed back by the pressure sensor when the high-voltage contactor is disconnected and connected, and F3 is the force value fed back by the pressure sensor after the servo module continues to move down to a certain position after the high-voltage contactor is disconnected and connected. Record the position values ​​X2 and X3 of the servo module corresponding to F2 and F3.

[0021] S5) Fit the linear equation of force and position y=kx+b using F2 and F3, and X2 and X3, where x represents the position value and y represents the force value. Calculate the value of y when x=0, which is F4, that is, the reaction force when the reaction spring is fully compressed. Then the contact pressure between the moving contact and the stationary contact is F5= F1-F4.

[0022] As a further optimization, the high-voltage contactor testing method also includes the following steps:

[0023] S61) Remove the stationary components of the high-voltage contactor;

[0024] S62) The height of the upper surface of the moving contact is measured as H1 by a laser rangefinder. After the electromagnetic coil is energized, the height of the upper surface of the moving contact is measured as H2. Then the magnetic gap of the high voltage contactor is H3 = H2 - H1.

[0025] Compared with the prior art, the present invention has the following beneficial effects: it eliminates manual intervention in the detection process and solves the problem of poor pressure and displacement accuracy. It can accurately measure and calculate the corresponding data (including contact pressure, breaking overtravel, etc.) and improve the stability of measurement. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the high-voltage contactor testing device of the present invention.

[0027] Figure 2 This is a structural diagram of the high-voltage contactor testing device of the present invention after the conduction mechanism has been removed.

[0028] Figure 3 This is a structural diagram of the testing mechanism of the high-voltage contactor testing device of the present invention.

[0029] Figure 4 This is a structural diagram of the conduction mechanism of the high-voltage contactor testing device of the present invention.

[0030] Figure 5 This is a cross-sectional schematic diagram for testing a high-voltage contactor. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figures 1 to 4As shown, a high-voltage contactor testing mechanism includes a base 10, a positioning mechanism 20, a conducting mechanism 30, and a testing mechanism 40 disposed on the base. The positioning mechanism 20 includes at least a positioning seat 21 for placing the high-voltage contactor 10A. An electromagnetic coil 200 is provided on the positioning seat 21, that is, the positioning seat 21 has a through hole, and the electromagnetic coil 200 is provided at its lower end. The central hole of the electromagnetic coil 200 is connected to the through hole of the positioning seat 21. The central hole of the electromagnetic coil 200 is used to accommodate the stationary iron core and the moving iron core on the high-voltage contactor 10A. When the electromagnetic coil 200 is energized, it generates a magnetic field that acts on the stationary iron core and the moving iron core, causing the moving iron core to move upward and abut against the stationary iron core. The conduction mechanism 30 includes a support assembly 31, a drive cylinder 32, and probes 33. The drive cylinder 32 is mounted on the support assembly 31, and a pair of probes 33 are mounted on the output end of the drive cylinder 32. The pair of probes 33 are driven to act on the stationary contact of the high-voltage contactor 10A. The testing mechanism 40 includes a servo module 41, a pressure sensor 42, a connecting post 43, and a grating ruler 400. The pressure sensor 42 is mounted on the servo module 41, and the connecting post 43 is mounted on the pressure sensor 42. The connecting post 43 is driven to extend into the central hole of the electromagnetic coil 200 and abut against the lower end of the moving iron core. The grating ruler 400 is used to measure the moving distance of the output end of the servo module 41.

[0033] Combination Figure 5 As shown, the high-voltage contactor 10A to be tested in this invention includes a moving component 101 and a stationary component 102. The moving component 101 includes a base plate 1011, and a stationary iron core 1012 is fixedly mounted at the lower end of the base plate 1011. The moving iron core 1015 is located below the stationary iron core 1012. The moving iron core 1015 is connected to the adjusting rod 1013. The upper end of the adjusting rod 1013 can slide up and down through the stationary iron core 1012. The upper end of the adjusting rod 1013 is fixedly connected to the support plate 1014. The support plate 1014 abuts against the upper end of the base plate 1011. A reaction spring 1016 (which mainly plays a leading role when the coil is de-energized) is sleeved on the adjusting rod 1013. The two ends of the reaction spring 1016 abut against the stationary iron core 1012 and the moving iron core 1015 respectively. The upper end of the support plate 1014 is connected to the moving contact 1018 through the contact pressure spring 1017 (which mainly plays a role during and after the contact is closed). The above is the main structure of the moving component 101. The main structure of the stationary component 102 includes a cover 1021 and a stationary contact 1022 set on the cover 1021. The cover 1021 is installed on the base plate 1011. The above-mentioned high-voltage contactor 10A is tested using the following steps:

[0034] S1) Place the high voltage contactor 10A on the positioning mechanism 20, that is, on the positioning seat 21, so that the base plate 1011 in the moving assembly 101 abuts against the positioning seat 21, and so that the stationary iron core 1012 and the moving iron core 1015 extend into the center hole of the electromagnetic coil 200.

[0035] S2) When the electromagnetic coil 200 is energized, the moving iron core 1015 abuts against the stationary iron core 1012 under the action of the magnetic field, and the moving contact 1018 of the high-voltage contactor 10A abuts against the stationary contact 1022. Specifically, when the electromagnetic coil 200 is energized, the moving iron core 1015 moves upward under the action of the magnetic field and abuts against the stationary iron core 1012. Simultaneously, the moving iron core 1015 drives the adjusting rod 1013 to move upward. At the same time, the reaction spring 1016 is compressed. The adjusting rod 1013 drives the support plate 1014 to move upward. The support plate 1014 drives the moving contact 1018 to move upward through the contact pressure spring 1017. The moving contact 1018 abuts against the stationary contact 1022, and the moving contact 1018 and the support plate 1014 compress the contact pressure spring 1017.

[0036] S3) The probe 33 is driven to abut against the upper end of the stationary contact 1022, and the high voltage contactor 10A is tested to see if it can work normally; the servo module 41 drives the connecting post 43 to move upward and abut against the lower end of the moving iron core 1015 for pre-pressure.

[0037] S4) When the electromagnetic coil 200 is de-energized, the moving iron core 1015 tends to move away from the stationary iron core 1012 under the action of the reaction spring 1016. However, because the servo module 41 drives the connecting post 43 to abut against the moving iron core 1015, the movement of the moving iron core 1015 is blocked. At this time, the pressure sensor 42 feeds back the force value F1, which includes the force generated by the deformation of the contact pressure spring 1017 and the force generated by the deformation of the reaction spring 1016. Simultaneously, the position value X1 of the servo module 41 (output end moving slide plate 411) is recorded by the grating ruler 400. Then, the servo module 41 drives the connecting post 43 to move slowly downwards. The entire process of the servo module 41 moving downwards... The process of spring release force, i.e., the process of contact pressure spring 1017 and reaction spring 1016 returning to their original state, is as follows: since contact pressure spring 1017 mainly plays a role during and after contact closure, that is, the role of contact pressure spring 1017 is to apply force to push contact 1018 to abut against stationary contact 1022; the entire process of servo module 41 moving downward has two stages. The first stage is the process of moving contact 1018 separating from stationary contact 1022. During this process, contact pressure spring 1017 and reaction spring 1016 synchronously tend to return to their original state, but contact pressure spring 1017 returns to its original state before force spring 1016. When contact pressure spring 1017 returns to its original state, the contact pressure spring 1017 returns to its original state before force spring 1016. After spring 1017 returns to its original position, the moving contact 1018 and the stationary contact 1022 are separated, completing the first stage of the action and entering the second stage. The second stage is the process of the reaction spring 1016 returning to its original position as the servo module 41 moves downward. That is, the force of the reaction spring 1016 pushes the moving iron core 1015 to drive the adjusting rod 1013 and the support plate 1014 to reset. During the downward movement of the servo module 41, when the first stage is completed, the moving contact 1018 and the stationary contact 1022 are separated. The high-voltage contactor 10A is no longer conducting as tested by probe 33. At this time, the force value F2 fed back by pressure sensor 42 is recorded, and the grating ruler 400 records the force value of the servo module 41 (output end). The position value X2 of the moving slide plate 411 is recorded by the pressure sensor 42. During this process, the force values ​​F1 to F2 and the displacement values ​​X1 to X2 can form a force-displacement relationship equation. In the second stage, the reaction spring 1016 returns to its original state, and the pressure sensor 42 feeds back the values ​​from F2 to F3. The grating ruler 400 records the position value X3 of the servo module 41 (output end moving slide plate 411) (corresponding to position F3). Then, the force values ​​F2 to F3 and the displacement values ​​X2 to X3 can form another force-displacement relationship equation. The above two equations are linear equations obtained by fitting. The intersection of the two linear equations corresponds to the data F2 and X2.

[0038] S5) The linear equation of force and position, y=kx+b, fitted by F2 to F3 and X2 to X3, is the linear equation of force of reaction spring 1016, where x represents the position value and y represents the force value. The value of y when x=0 is F4, which is the reaction force when reaction spring 1016 is fully compressed. Subtracting F4 from F1 gives the total force of the two springs minus the reaction force when reaction spring 1016 is fully compressed, thus obtaining the force of contact pressure spring 1017 when it is compressed, i.e., the contact pressure between the moving contact and the stationary contact F5= F1-F4.

[0039] In the actual application of the high-voltage contactor 10A, after the electromagnetic coil is de-energized in its application scenario, the moving iron core 1015 will not be blocked from moving. Therefore, the moving iron core 1015 moves downward under the trend of the reaction spring 1016 returning to its original state, and simultaneously drives the support plate 1014 to move downward through the adjusting rod 1013. The downward movement of the support plate 1014 causes the contact pressure spring 1017 to return to its original state, and drives the moving contact 1018 to separate from the stationary contact 1022, thus achieving disconnection. In conjunction with the high-voltage contactor testing device and method in this application, the value F1 measured by the pressure sensor 42 is the reaction force, which can be regarded as the contact force between the moving contact 1018 and the stationary contact 1022 when the electromagnetic coil 200 is energized (including the force of the compressed contact pressure spring 1017 and the force of the compressed reaction spring 1016). However, in the actual application of the high-voltage contactor 10A, the contact pressure when the moving contact 1018 and the stationary contact 1022 abut is only the force transmitted from the moving iron core 105 to the adjusting rod 103 and the support plate 104 through the contact pressure spring 1017 to the moving contact 1018 (which abuts against the stationary contact 1022), and does not include the force of the compressed reaction spring 1016. Therefore, it is necessary to subtract the force of the compressed reaction spring 1016 from F1. The force of the compressed reaction spring 1016 can be obtained by fitting and calculation as F1. 4， Therefore, the contact pressure is calculated to be F5 = F1 - F4. When the force of the compressed contact pressure spring 1017 disappears, the moving contact 1018 and the stationary contact 1022 are disconnected. At this time, the segment overtravel is the distance moved by the servo module 41, which is X2 - X1. In the actual application of the high voltage contactor 10A, the return spring 1016 mainly plays a leading role when the electromagnetic coil 200 is de-energized. It provides the return force, which is the force that pushes the moving iron core 1015 to drive the adjusting rod 1013 and the support plate 1014 to reset after the contact pressure spring 1017 is restored. The return force is F2.

[0040] In this invention, preferably, the positioning mechanism 20 further includes a pushing assembly 22. A pair of pushing assemblies 22 are symmetrically arranged on opposite sides of the positioning base 21 for clamping the high-voltage contactor 10A. Specifically, the pushing assembly 22 includes a pushing cylinder disposed on the base 10 and a top block disposed at the output end of the pushing cylinder. The pushing cylinder drives the top block to abut against the high-voltage contactor 10A. The action of the pair of pushing assemblies 22 can ensure the accurate positioning and horizontal stability of the high-voltage contactor 10A.

[0041] Furthermore, the positioning mechanism 20 also includes a spinning assembly 23, which is disposed beside the positioning seat 21 and is used to press the high-voltage contactor 10A. Specifically, the spinning assembly 23 includes a lifting cylinder and a pressure block. The middle part of the pressure block is hinged to the base 10, and the lifting cylinder is disposed on the base 10. Its output end is hinged to the end of the pressure block, and the other end of the pressure block can be used to press down the high-voltage contactor 10A. A pair of spinning assemblies 23 are symmetrically provided, which press against the high-voltage contactor 10A to ensure the vertical stability of the high-voltage contactor 10A.

[0042] The positioning mechanism 20 also includes a material arrival sensor 201, which is used to detect whether a high-voltage contactor 10A is placed on the positioning seat 21; in addition, the high-voltage contactor 10A can be scanned by a barcode scanner 202 set on the base 10.

[0043] Preferably, the support assembly 31 includes a translation module 311 and a mounting plate 312 disposed on the translation module 311; the drive cylinder 32 is disposed on the mounting plate 312, and the probe 33 is disposed at the output end of the drive cylinder 32 via a connecting plate 321. Based on the fact that the positioning seat 21 can be replaced with different specifications (suitable for different high-voltage contactors), the movement of the translation module 311 ensures that the probe 33 is aligned with the stationary contact of the high-voltage contactor.

[0044] In another embodiment of the present invention, the high-voltage contactor testing mechanism further includes a laser rangefinder 50, which is mounted on the mounting plate 312. After the probe 33 makes contact with the high-voltage contactor 10A, i.e., after testing the contact pressure, return force, and other data of the high-voltage contactor 10A, the laser rangefinder 50 is moved above the high-voltage contactor 10A by the translation module 311 to complete the testing of other data. Specifically, the high-voltage contactor testing method further includes the following steps:

[0045] S61) Remove the stationary component 102 of the high-voltage contactor 10A;

[0046] S62) The height of the upper end face of the moving contact 1018 is measured as H1 by the laser rangefinder 50. After the electromagnetic coil 200 is energized, the height of the upper end face of the moving contact 1018 is measured as H2. Then the magnetic gap 100 of the high voltage contactor 10A is H3 = H2 - H1. In addition, the contact gap (the gap between the moving contact 1018 and the stationary contact 1022) can also be calculated, that is, the size of the magnetic gap minus the size of the breaking overtravel.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A high-voltage contactor testing device, characterized in that, Includes a base, and on said base: A positioning mechanism includes at least a positioning seat for placing a high-voltage contactor. The positioning seat is equipped with an electromagnetic coil. A central hole in the electromagnetic coil accommodates the stationary and moving iron cores of the high-voltage contactor. When energized, the electromagnetic coil generates a magnetic field that acts on the stationary and moving iron cores. The conducting mechanism includes a support assembly, a drive cylinder, and probes. The drive cylinder is mounted on the support assembly, and a pair of probes are located at the output end of the drive cylinder. The pair of probes are driven to act on the stationary contacts of the high-voltage contactor. The testing mechanism includes a servo module, a pressure sensor, a connecting post, and a grating ruler. The pressure sensor is mounted on the servo module, and the connecting post is mounted on the pressure sensor. The connecting post is driven to extend into the central hole of the electromagnetic coil and abut against the lower end of the moving iron core. The grating ruler is used to measure the movement distance of the output end of the servo module.

2. The high-voltage contactor testing device according to claim 1, characterized in that, The positioning mechanism also includes a pushing assembly, and a pair of pushing assemblies are symmetrically arranged on opposite sides of the positioning seat for clamping the high-voltage contactor.

3. The high-voltage contactor testing device according to claim 2, characterized in that, The jacking assembly includes a jacking cylinder disposed on the base and a top block disposed at the output end of the jacking cylinder.

4. The high-voltage contactor testing device according to claim 1 or 2, characterized in that, The positioning mechanism also includes a spinning assembly, which is located beside the positioning seat and is used to press the high-voltage contactor.

5. The high-voltage contactor testing device according to claim 4, characterized in that, The spinning assembly includes a lifting cylinder and a pressure block. The middle part of the pressure block is hinged to the base. The lifting cylinder is disposed on the base, and its output end is hinged to the end of the pressure block. A pair of spinning assemblies are provided symmetrically.

6. The high-voltage contactor testing device according to claim 1, characterized in that, The positioning mechanism also includes a material arrival sensor.

7. The high-voltage contactor testing device according to claim 1, characterized in that, The support assembly includes a translation module and a mounting plate disposed on the translation module; the drive cylinder is disposed on the mounting plate.

8. The high-voltage contactor testing device according to claim 7, characterized in that, It also includes a laser rangefinder, which is mounted on the mounting plate.

9. A test method for a high-voltage contactor, characterized in that, The high-voltage contactor testing device according to any one of claims 1 to 8 is used for testing, and the testing method includes the following steps: S1) Place the high-voltage contactor on the positioning mechanism so that the stationary iron core and the moving iron core on the high-voltage contactor extend into the center hole of the electromagnetic coil; S2) When the electromagnetic coil is energized, the moving iron core and the stationary iron core come into contact under the action of the magnetic field, and the moving contact of the high-voltage contactor comes into contact with the stationary contact. S3) The probe is driven to abut against the upper end of the stationary contact; the servo module drives the connecting post to move upward and abut against the lower end of the moving iron core for pre-compression; S4) When the electromagnetic coil is de-energized, record the force value F1 fed back by the pressure sensor and record the position value X1 of the servo module using a grating ruler; the servo module drives the connecting column to move down slowly, and record the force values ​​F2 and F3 fed back by the pressure sensor. F2 is the force value fed back by the pressure sensor when the high-voltage contactor is disconnected and connected, and F3 is the force value fed back by the pressure sensor after the servo module continues to move down to a certain position after the high-voltage contactor is disconnected and connected. Record the position values ​​X2 and X3 of the servo module corresponding to F2 and F3. S5) Fit the linear equation of force and position y=kx+b using F2 and F3, and X2 and X3, where x represents the position value and y represents the force value. Calculate the value of y when x=0 as F4, where F4 is the reaction force when the reaction spring is fully compressed. The contact pressure between the moving contact and the stationary contact is F5= F1-F4.

10. The high-voltage contactor testing method according to claim 9, characterized in that, It also includes the following steps: S61) Remove the stationary components of the high-voltage contactor; S62) The height of the upper surface of the moving contact is measured as H1 by a laser rangefinder. After the electromagnetic coil is energized, the height of the upper surface of the moving contact is measured as H2. Then the magnetic gap of the high voltage contactor is H3 = H2 - H1.

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