Contact life testing device

Abstract

The present invention discloses a contact life test device, comprising a test box for testing the silver coating of contacts and contact fingers, a device box fixedly mounted on the top of the test box, a telescopic mechanism mounted at each end of the lower portion of the device box, an actuator mounted inside the device box for driving the telescopic mechanism to reciprocate longitudinally, a telescopic silver coating detection device mounted on the back of the test box at the contact position, a heating box fixedly mounted on one inner side wall of the test box, and a steam generator fixedly mounted on the outer surface of the test box at the heating box position. The telescopic mechanism and clamping base of the present invention can accommodate the installation of contact fingers of different types and sizes, and the degree of wear of the graphene silver coating of the contacts is detected by the telescopic silver coating detection device. The test box generates different temperatures and humidity levels, which can simulate the impact of closing and closing actions on the wear of the graphene silver coating of the contacts in different environments.

Description

Technical Field

[0001] The present invention relates to the technical field of isolating switch detection equipment, and more particularly to a contact life testing device. Background Art

[0002] As a key component of high-voltage disconnectors, the silver plating layer of the contacts is very likely to cause abnormal heating failures due to sulfide corrosion, posing a safety hazard to the reliable operation of the power grid. In order to improve the service life of the disconnectors, silver plating is generally used on the surfaces of the moving and static contacts of high-voltage disconnectors at home and abroad. The main silver plating processes include ordinary silver plating, hard silver plating and graphite silver plating.

[0003] The silver coating obtained by the ordinary silver plating process has low hardness and poor wear resistance, and is not suitable for a large number of opening and closing operations of the disconnector. The hard silver plating process is to add a hardness agent during silver plating to improve the hardness and wear resistance of the silver coating, but the actual use effect is not ideal.

[0004] Therefore, the development of graphene silver plating technology provides ideas for solving the above problems. Due to the diverse structures of disconnectors and different contact shapes, there is currently no device specifically used to detect the life of the graphene contact plating of high-voltage disconnectors. It can only be installed on the disconnector and the coating wear test can be performed through the disconnector opening and closing operations, which is time-consuming and the test accuracy is not high. Summary of the Invention

[0005] The purpose of the present invention is to provide a contact life testing device.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a contact life testing device, comprising a test box for testing the silver coating of contacts and contact fingers, the front side of the test box being open, with a door installed in the opening, a device box being fixedly installed on the top of the test box, a telescopic mechanism being installed at the bottom of the device box, an actuator for driving the telescopic mechanism to reciprocate longitudinally and telescopically being installed inside the device box, the contact being detachably installed at the bottom of the telescopic mechanism, a slide groove opening being provided at the bottom of the test box, a clamping base being slidably installed on the slide groove opening, and a positioning mechanism for driving the clamping base to move being installed in the slide groove opening, the clamping base being used to fix the contact fingers, and a telescopic silver plating layer detection device being installed at the contact position on the back side of the test box.

[0007] Preferably, the telescopic mechanism includes a protruding tube, a sliding column and a pull rod. The protruding tube is fixedly installed at the lower part of the device box, the protruding tube is connected to the device box, the sliding column is slidably installed in the protruding tube, and the lower end of the pull rod is movably hinged to the upper end of the sliding column.

[0008] Preferably, the execution device includes a rotating shaft, which is rotatably installed in the device box, and two turntables are fixedly installed on the rotating shaft. A protruding column is fixedly installed at one end of the outer edge of the turntable, and the upper end of the pull rod is movably hinged to the protruding column at the corresponding position. A motor for driving the rotating shaft to rotate is fixedly installed on the outside of the test box.

[0009] Preferably, the positioning mechanism includes two threaded rods rotatably installed in the sliding groove mouth, and the clamping base is provided with two, and the clamping base includes two I-shaped slides, which are slidably installed in the sliding groove mouth, and the lower part of the I-shaped slide is provided with a threaded hole. The two I-shaped slides are installed at both ends of the threaded rod through the threaded holes, and the surface of the threaded rod is provided with threads with opposite patterns in half. The outer surface of the test box is provided with a driving device fixedly connected to the threaded rod at the corresponding position, and the driving device is a handle or a motor.

[0010] Preferably, the telescopic silver plating layer detection device includes a protective box, a first electric push rod and a silver plating layer detector. The protective box is fixedly installed on the inner back of the test box, the front side of the protective box is open, a guide rail is fixedly installed on the bottom of the protective box, and a slider is slidably installed on the guide rail. The silver plating layer detector is fixedly installed on the slider, and the first electric push rod is fixedly installed on the inner back of the protective box. The piston shaft of the first electric push rod is fixedly connected to the silver plating layer detector through a spring.

[0011] Preferably, a heating box is fixedly installed on an inner wall of the test box, a steam generator is fixedly installed on the outer surface of the test box at the position of the heating box, the steam outlet of the steam generator is connected to the heating box, and a plurality of electric heating rods are fixedly installed in the heating box.

[0012] Preferably, a slot is provided on the lower portion of the sliding column and passes through the surfaces on both sides, and both ends of the slot are movably inserted into the L-shaped plate, and knob bolts are installed on the surface of the I-shaped slide and the L-shaped plate.

[0013] Preferably, the test box further comprises a storage cabinet fixedly mounted at the bottom of the test box, a display screen fixedly mounted on one side of the storage cabinet, and a wireless transmission module fixedly mounted on the top of the test box.

[0014] Preferably, proximity switches are fixedly installed on both inner walls of the test box, and a reflective patch is fixedly installed on the outer surface of the contact near the position of the proximity switch. When the contact end of the contact is flush with the silver plating layer detector, the infrared emitting end of the proximity switch is flush with the position of the reflective patch, and the proximity switch controls the start and stop of the first electric push rod and the silver plating layer detector through PLC.

[0015] Preferably, a temperature sensor and a humidity sensor are installed in the test box, and a turn counter is installed at the connection between the motor and the rotating shaft. The data detected by the turn counter, temperature sensor, humidity sensor, and silver plating layer detector are displayed on a display screen, and the data can be transmitted to a remote terminal through a wireless transmission module.

[0016] Preferably, a door cover is movably hinged on the upper portion of the front surface of the protection box, a protruding plate is fixedly installed on the upper portion of the door cover, a second electric push rod is fixedly installed on the upper surface of the protection box, and a piston shaft of the second electric push rod is movably hinged to the protruding plate.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The present invention facilitates the installation and disassembly of contacts and contact fingers. The telescopic mechanism and the clamping base can adapt to the installation of contact fingers of different types and sizes. The telescopic mechanism is controlled by a linear device to reciprocate the insertion of the contact into the contact finger, which can imitate the closing and closing actions of the contact and the contact finger, causing wear. After a certain period of testing, the wear degree of the graphene silver-plated coating of the contact can be detected by the telescopic silver-plated layer detection device. A heating box is fixedly installed on the inner wall of the test box, and a steam generator is fixedly installed on the outer surface of the test box at the position of the heating box, which can make the test box produce different temperatures and humidity, and can simulate the test of the influence of the closing and closing actions on the wear of the graphene silver-plated layer of the contact in different environments, thereby ensuring the accuracy of the test. At the same time, the data during the test can be displayed in real time for easy viewing by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of a contact life testing device of the present invention;

[0021] Figure 2 is a cross-sectional view of the telescopic silver-plated layer detection device of the present invention;

[0022] Figure 3 is a cross-sectional view of the telescopic mechanism and the device box of the present invention;

[0023] Figure 4 It is a structural diagram of the I-type slide plate of the present invention;

[0024] Figure 5 In the present invention Figure 1A magnified schematic diagram of structure A;

[0025] Figure 6 is a cross-sectional view of the heating box of the present invention;

[0026] Figure 7 It is a structural diagram of the threaded rod of the present invention.

[0027] In the figure: 1 storage cabinet, 11 test box, 12 display screen, 13 steam generator, 14 motor, 15 wireless transmission module, 16 slide slot, 17 door, 18 proximity switch, 2 device box, 21 rotating shaft, 22 turntable, 3 contact, 4 contact finger, 5 telescopic mechanism, 51 protruding cylinder, 52 sliding column, 53 pull rod, 54 slot, 55 L-shaped plate, 56 knob bolt, 6 clamping base, 61 I-shaped slide plate, 62 threaded rod, 63 driving device, 7 telescopic silver plating layer detection device, 71 protection box, 72 door cover, 73 first electric push rod, 74 silver plating layer detector, 75 guide rail, 76 slider, 77 spring, 78 second electric push rod, 8 heating box, 81 electric heating rod. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0029] See Figure 1-Figure 7As shown, the present invention provides a contact life test device, including a storage cabinet 1, on which a test box 11 for testing the silver coating of the contacts 3 and the contact fingers 4 is fixedly installed. The front side of the test box 11 is open, and a door 17 is installed in the opening. The door 17 is made of transparent material to facilitate observation by the staff, and can be specifically made of glass or transparent plastic plate. A device box 2 is fixedly installed on the top of the test box 11, and a telescopic mechanism 5 is installed at the bottom of the device box 2. An actuator for driving the telescopic mechanism 5 to reciprocate longitudinally is installed inside the device box 2. The contact 3 is detachably installed at the bottom of the telescopic mechanism 5. A slide groove 16 is provided at the bottom of the test box 1, and a clamping base 6 is slidably installed on the slide groove 16, and an adjustment mechanism for driving the clamping base 6 to move is installed in the slide groove 16. The over-positioning mechanism can control the clamping base 6 to fix and clamp the contact finger 4, and the telescopic mechanism 5 reciprocates the insertion of the contact 3 into the contact finger 4, which can imitate the closing and closing actions of the contact 3 and the contact finger 4, causing wear thereof. A telescopic silver-plated layer detection device 7 is installed on the back side of the interior of the test box 11 at the position of the contact 3. The telescopic silver-plated layer detection device 7 is used to detect the degree of wear of the graphene silver-plated coating of the contact 3. A heating box 8 is fixedly installed on an inner wall of the test box 11, and a steam generator 13 is fixedly installed on the outer surface of the test box 11 at the position of the heating box 8. The steam outlet of the steam generator 13 is connected to the heating box 8, and a plurality of electric heating rods 81 are fixedly installed in the heating box 8, which can enable the test box 11 to produce an environment with different temperature and humidity, so as to facilitate the test of the impact of the wear of the contact 3 under simulated different environments.

[0030] In this embodiment, there are two telescopic mechanisms 5, which include a protruding tube 51, a sliding column 52 and a pull rod 53. The protruding tube 51 is fixedly installed at the lower part of the device box 2, and the protruding tube 51 is connected to the device box 2. The sliding column 52 is slidably installed in the protruding tube 51, and the lower end of the pull rod 53 is movably hinged to the upper end of the sliding column 52.

[0031] In this embodiment, the execution device includes a rotating shaft 21, which is rotatably installed in the device box 2. Two turntables 22 are fixedly installed on the rotating shaft 21. The turntable 22 is located at the position of the telescopic mechanism 5. A protruding column is fixedly installed at one end of the outer edge of the turntable 22. The upper end of the pull rod 53 is movably hinged to the protruding column at the corresponding position. The outside of the test box 11 is fixedly installed with a motor 14 for driving the rotating shaft 21 to rotate. The motor 14 drives the rotating shaft 21 to rotate, so that the turntable 22 can drive the pull rod 53 to deflect, thereby driving the sliding column 52 to rise and fall.

[0032] In this embodiment, the positioning mechanism includes two threaded rods 62 rotatably installed in the slide groove mouth 16, and the clamping base 6 is provided with two, and the clamping base 6 includes two I-shaped slides 61, which are slidably installed in the slide groove mouth 16, and a threaded hole is opened at the lower part of the I-shaped slide 61. The two I-shaped slides 61 are installed at both ends of the threaded rod 62 through the threaded hole, and the surface of the threaded rod 62 is provided with a thread with opposite textures in half. The outer surface of the test box 11 is provided with a driving device 63 fixedly connected to the threaded rod 62 at the corresponding position. The driving device 63 is a handle or a motor. When the driving device 63 is a handle, the two I-shaped slides 61 can be driven to move relative or oppositely by rotating the handle. When the driving device 63 is a motor, the motor is equipped with a control switch, and the control switch is installed in an appropriate position. The control switch can control the forward and reverse rotation of the threaded rod 62, driving the two I-shaped slides 61 to move relative or oppositely, and the motor is a servo motor.

[0033] In this embodiment, the telescopic silver plating layer detection device 7 includes a protective box 71, a first electric push rod 73 and a silver plating layer detector 74. The protective box 71 is fixedly installed on the inner back of the test box 11. The front side of the protective box 71 is open. A guide rail 75 is fixedly installed on the bottom of the protective box 71. A slider 76 is slidably installed on the guide rail 75. The silver plating layer detector 74 is fixedly installed on the slider 76. The first electric push rod 73 is fixedly installed on the inner back of the protective box 71. The piston shaft of the first electric push rod 73 is fixedly connected to the silver plating layer detector 74 through a spring 77.

[0034] In this embodiment, a door cover 72 is movably hinged on the upper part of the front surface of the protection box 71, and a protruding plate is fixedly installed on the upper part of the door cover 72. A second electric push rod 78 is fixedly installed on the upper surface of the protection box 71, and the piston shaft of the second electric push rod 78 is movably hinged to the protruding plate. The door cover 72 can protect the first electric push rod 73 and the silver plating layer detector 74, thereby preventing moisture from entering. When testing is required, it is only necessary to open the second electric push rod 78 to pull up the door cover 72, thereby facilitating the extension of the silver plating layer detector 74.

[0035] In this embodiment, a slot opening 54 is provided at the lower portion of the slide column 52, which passes through the surfaces on both sides. Both ends of the slot opening 54 are movably inserted into the L-shaped plate 55. Knob bolts 56 are installed on the surfaces of the I-shaped slide plate 61 and the L-shaped plate 55. The contact 3 and the contact finger 4 can be fixedly installed between the two L-shaped plates 55 and between the two I-shaped slide plates 61 respectively through the knob bolts 56. At the same time, it can adapt to the installation of contacts 3 and contact fingers 4 of different sizes, and has strong applicability.

[0036] In this embodiment, a storage cabinet 1 is fixedly installed at the bottom of the test box 11. The storage cabinet 1 is used to store the staff's tools. A display screen 12 is fixedly installed on one side of the storage cabinet 1. A wireless transmission module 15 is fixedly installed on the top of the test box 11.

[0037] In this embodiment, proximity switches 18 are fixedly installed on both inner walls of the test box 11, and a reflective patch is fixedly installed on the outer surface of the contact 3 near the position of the proximity switch 18. When the contact end of the contact 3 is flush with the silver plating layer detector 74, the infrared emitting end of the proximity switch 18 is flush with the position of the reflective patch. The proximity switch 18 controls the start and stop of the first electric push rod 73 and the silver plating layer detector 74 through the PLC, so that the silver plating layer detector 74 can accurately detect the wear of the graphene silver plating layer at the contact end of the contact 3.

[0038] In this embodiment, a temperature sensor and a humidity sensor are installed in the test box 11, which can detect the temperature and humidity inside the test box 11 in real time, thereby facilitating the control of the steam and heat generated by the steam generator 13 and the electric heating rod 81, and can adjust the internal environment of the test box 11 to facilitate targeted testing. A revolution counter is installed at the connection between the motor 14 and the rotating shaft 21, which can count the number of revolutions of the motor 14. When the motor 14 rotates one revolution, the contact 3 just inserts the contact finger 4 once, thereby facilitating the number of tests. By presetting a value in the PLC, the test cycle can be controlled. When a cycle is completed, the proximity switch 18 is activated to enable the silver plating layer detector 74 to perform silver plating wear detection on the contact end of the contact finger 4. The data detected by the revolution counter, temperature sensor, humidity sensor, and silver plating layer detector 74 are displayed on the display screen 12. At the same time, the data can be transmitted to a remote terminal through the wireless transmission module 15. The remote terminal can be a mobile phone or a computer, which is convenient for staff to view the data in time.

[0039] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, the patent owner may make various changes or modifications within the scope of the appended claims. As long as they do not exceed the scope of protection described in the claims of the present invention, they should be within the scope of protection of the present invention.

Claims

1. A contact life test device, comprising a test box for testing the silver coating of contacts and contact fingers, characterized in that: The front side of the test box is open, and a door is installed in the opening. A device box is fixedly installed on the top of the test box, and a telescopic mechanism is installed at the bottom of the device box. An actuator for driving the telescopic mechanism to reciprocate longitudinally is installed inside the device box. The contact is detachably installed at the bottom of the telescopic mechanism. A slide groove is opened at the bottom of the test box, and a clamping base is slidably installed on the slide groove. A positioning mechanism for driving the clamping base to move is installed in the slide groove. The clamping base is used to fix the contact finger. A telescopic silver plating layer detection device is installed at the contact position on the back of the test box; The telescopic mechanism is provided with two, and the telescopic mechanism includes a protruding tube, a sliding column and a pull rod. The protruding tube is fixedly installed at the lower part of the device box, and the protruding tube is connected to the device box. The sliding column is slidably installed in the protruding tube, and the lower end of the pull rod is movably hinged to the upper end of the sliding column. The execution device includes a rotating shaft, which is rotatably mounted in the device box, and two turntables are fixedly mounted on the rotating shaft. A protruding column is fixedly mounted on one end of the outer edge of the turntable. The upper end of the pull rod is movably hinged to the protruding column at the corresponding position. A motor for driving the rotating shaft to rotate is fixedly mounted on the outside of the test box; The positioning mechanism includes two threaded rods rotatably installed in the sliding groove mouth, and the clamping base is provided with two. The clamping base includes two I-shaped slides, which are slidably installed in the sliding groove mouth. The I-shaped slides are provided with threaded holes. The two I-shaped slides are installed at both ends of the threaded rod through the threaded holes. The surface of the threaded rod is provided with threads with opposite textures in half. The outer surface of the test box is provided with a driving device fixedly connected to the threaded rod at the corresponding position. The driving device is a handle or a motor.

2. A contact life testing device according to claim 1, characterized in that: The telescopic silver-plated layer detection device includes a protective box, a first electric push rod and a silver-plated layer detector. The protective box is fixedly installed on the inner back of the test box, the front side of the protective box is open, a guide rail is fixedly installed on the bottom of the protective box, a slider is slidably installed on the guide rail, the silver-plated layer detector is fixedly installed on the slider, the first electric push rod is fixedly installed on the inner back of the protective box, and the piston shaft of the first electric push rod is fixedly connected to the silver-plated layer detector through a spring.

3. The contact life testing device according to claim 1, characterized in that: A heating box is fixedly installed on an inner wall of the test box, a steam generator is fixedly installed on the outer surface of the test box at the position of the heating box, the steam outlet of the steam generator is connected to the heating box, and multiple electric heaters are fixedly installed in the heating box.

4. The contact life testing device according to claim 1, characterized in that: A slot is provided at the bottom of the sliding column and passes through the surfaces on both sides. L-shaped plates are movably inserted at both ends of the slot. Knob bolts are installed on the surfaces of the I-shaped slide plate and the L-shaped plate.

5. The contact life testing device according to claim 1, characterized in that: It also includes a storage cabinet fixedly installed at the bottom of the test box, a display screen fixedly installed on one side of the storage cabinet, and a wireless transmission module fixedly installed on the top of the test box.

6. The contact life testing device according to claim 2, characterized in that: Proximity switches are fixedly installed on both inner walls of the test box, and a reflective patch is fixedly installed on the outer surface of the contact near the proximity switch. When the contact end of the contact is flush with the silver plating layer detector, the infrared emitting end of the proximity switch is flush with the reflective patch position, and the proximity switch controls the start and stop of the first electric push rod and the silver plating layer detector through the PLC.

7. The contact life testing device according to claim 1, characterized in that: A temperature sensor and a humidity sensor are installed in the test box, and a revolution counter is installed at the connection between the motor and the rotating shaft. The data detected by the revolution counter, temperature sensor, humidity sensor, and silver plating layer detector are displayed on a display screen, and the data can be transmitted to a remote terminal through a wireless transmission module.

8. The contact life testing device according to claim 2, characterized in that: A door cover is movably hinged on the upper portion of the front surface of the protection box, a protruding plate is fixedly installed on the upper portion of the door cover, a second electric push rod is fixedly installed on the upper surface of the protection box, and a piston shaft of the second electric push rod is movably hinged to the protruding plate.

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