A test and screening device for varistor used in the production of intelligent power distribution systems

Abstract

The present invention discloses a test and screening device for varistors used in the production of intelligent power distribution systems, comprising two uprights, wherein adjacent surfaces of the two uprights are fixedly connected to a placement plate and a test plate, wherein the test plate is located at the rear side of the placement plate, and the upper end of the placement plate is provided with multiple placement slots, wherein the test plate is provided with multiple test assemblies, wherein the test assemblies include a test cavity provided within the test plate, wherein the test cavity is provided with a top plate, and the front side of the top plate is provided with two contact pieces. The device can simultaneously measure multiple varistors, thereby greatly improving the efficiency of varistor testing. Furthermore, by setting a drive motor, the voltage on both sides of the varistor can be quickly and automatically adjusted, which is convenient and quick. At the same time, by setting a second electromagnet and a rotating assembly, varistors with the same voltage threshold can be collected, thereby achieving the purpose of rapid screening.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent power distribution systems, and in particular to a test and screening device for varistors used in the production of intelligent power distribution systems. Background Art

[0002] Smart power distribution system refers to an intelligent power distribution system. It uses intelligent power supply technology to reasonably control power consumption and analyze power consumption. In the production process of the intelligent power distribution system, electronic components such as varistors are used. When the power distribution system circuit is subjected to overvoltage, the voltage is clamped and the excess current is absorbed to protect the intelligent power distribution system. Varistors need to be tested during production. However, existing varistors still have the following problems during testing:

[0003] Most existing varistor tests place a single varistor on a test bench, then adjust the current through the varistor by manually sliding a rheostat, and then measure the varistor through the coefficient on the voltmeter. However, since most existing measuring devices can only detect a single varistor, the detection efficiency is low, which affects the subsequent installation efficiency of the varistor. In addition, it is more troublesome to adjust the voltage across the varistor by manually and slowly adjusting the sliding rheostat. Therefore, how to reasonably solve this problem is what we need to consider. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and propose a test and screening device for varistors used in the production of intelligent power distribution systems. The device can measure multiple varistors at the same time, thereby greatly improving the test efficiency of the varistors. Through the setting of the drive motor, the voltage on both sides of the varistor can be adjusted quickly and automatically, which is convenient and fast. At the same time, through the setting of the second electromagnet and the rotating assembly, varistors with the same voltage threshold can be collected, thereby achieving the purpose of rapid screening.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A test and screening device for varistors used in the production of intelligent power distribution systems comprises two columns, adjacent surfaces of the two columns are fixedly connected with a placement plate and a test plate, the test plate is located at the rear side of the placement plate, the upper end of the placement plate is provided with a plurality of placement slots, and the test plate is provided with a plurality of test components, the test component comprises a test cavity arranged in the test plate, the test cavity is provided with a top plate, the front side of the top plate is provided with two contact pieces, the rear side of the top plate is elastically connected to the rear inner wall of the test cavity by two third springs, the front side of the test cavity is provided with two through openings, the adjacent surfaces of the two columns are fixedly connected with a horizontal plate, the upper end of the horizontal plate is provided with a plurality of voltmeters; an automatic adjustment component is provided in the horizontal plate, the automatic adjustment component is used to adjust the voltage across the varistor; a rotating component is provided in each of the two columns, and the two rotating components are used to tilt the placement plate to screen a plurality of varistors.

[0007] Preferably, the adjustment assembly includes an adjustment cavity arranged in the horizontal plate, and a drive motor is installed on the left side of the column located on the left side. The end of the output shaft of the drive motor extends into the adjustment cavity and is fixedly connected to a threaded rod. The two ends of the threaded rod are rotatably connected to the left and right inner walls of the adjustment cavity. The threaded layer part of the threaded rod is threadedly connected to a moving block, and the moving block is slidably connected to the inner wall of the adjustment cavity. A resistance plate is installed on the inner top of the adjustment cavity, and a conductive plate is installed on the inner bottom of the adjustment cavity.

[0008] Preferably, a control assembly is provided on the right side of the column located on the right side, and the control assembly includes a control box arranged on the right side of the column, a first electromagnet is provided at the inner bottom of the control box, a control block is provided in the control box, the control block is slidably connected to the inner wall of the control box, the adjacent surface of the control block and the first electromagnet is elastically connected by a second spring, the control block is conductive, and conductive blocks are provided on the left and right inner walls of the control box.

[0009] Preferably, the rotating assembly includes a vertical cavity arranged in the column, a slider is provided in the vertical cavity, the slider is slidably connected to the inner wall of the vertical cavity, the lower end of the slider is elastically connected to the inner bottom of the vertical cavity by a first spring, the upper end of the slider is provided with a rack, a rotating rod is provided in the vertical cavity, the two ends of the rotating rod are rotatably connected to the left and right inner walls of the vertical cavity, a gear is provided on the rotating rod that matches the rack, and a collection frame is provided between the two columns.

[0010] Preferably, the rear space of each test cavity is connected to the outside world through an air inlet pipe, and the rear space of the test cavity is connected with multiple short tubes, and multiple short tubes are connected to the outside world through a transverse tube. Multiple short tubes and the air inlet pipe are provided with a one-way valve, and the air outlet end of the transverse tube is provided with a sealing assembly. Multiple second electromagnets are provided on the rear side of the test plate, and each of the top plates is magnetic.

[0011] Preferably, the sealing assembly includes a handle arranged on the right side of the right column, a guide groove is provided on the right side of the column on the right, two guide blocks are fixedly connected to the left side of the handle, the left ends of the two guide blocks extend into the guide groove and are slidably connected to the inner wall thereof, the left sides of the two guide blocks are elastically connected to the left inner wall of the corresponding guide groove through a fourth spring, a sealing rod is fixedly connected to the left side of the handle, and the left end of the sealing rod extends into the cross tube.

[0012] Preferably, a conductive rod is provided on the left side of the guide block located on the rear side, and the left inner wall of the corresponding guide groove is provided with a conductive rod, a copper wire is provided in the guide block located on the rear side, and conductive sheets matching the copper wire are provided on the front and rear inner walls of the guide groove located on the rear side.

[0013] The present invention has the following beneficial effects:

[0014] 1. Compared with the existing technology, the arrangement of multiple test cavities and contact pieces allows multiple varistors to be connected in parallel after placement, thereby enabling the thresholds of multiple varistors to be tested simultaneously, thereby improving the testing effect of the varistors;

[0015] 2. Compared with the prior art, the second electromagnet and the rotating assembly are provided, so that the varistor with the tested threshold value can be ejected and then the varistor with the same threshold value can be collected, thereby collecting varistors with different threshold values ​​during batch testing;

[0016] 3. Compared with the existing technology, by adjusting the setting of the component, the operation of the drive motor can be used to drive the slider to rotate slowly, so there is no need for manual adjustment, which greatly reduces the labor of the tester. At the same time, the drive motor is controlled by the control component, which makes the response faster, thereby making the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a test and screening device for varistors used in production of intelligent power distribution systems proposed by the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 for Figure 1 Middle BB cross section;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0021] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0022] Figure 6 This is an electrical connection diagram of an external power supply, a control switch, a conductive unit, an adjustment module, multiple varistors, multiple second electromagnets, a first electromagnet, a conductive component, two first springs, and a voltmeter.

[0023] In the figure: 1 column, 2 placement plate, 3 placement slot, 4 cross plate, 5 voltmeter, 6 adjustment chamber, 7 threaded rod, 8 moving block, 9 resistance plate, 10 conductive plate, 11 vertical chamber, 12 slider, 13 first spring, 14 control box, 15 first electromagnet, 16 second spring, 17 conductive block, 18 control block, 19 rotating rod, 20 rack, 21 gear, 22 test plate, 23 second electromagnet, 24 intake pipe, 25 test chamber, 26 port, 27 top plate, 28 third spring, 29 cross tube, 30 pull handle, 31 sealing rod, 32 guide slot, 33 guide block, 34 fourth spring, 35 conductive rod, 36 conductive sheet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Reference Figure 1-6 , a test and screening device for varistors used in the production of intelligent power distribution systems, comprising two columns 1, adjacent surfaces of the two columns 1 are fixedly connected with a placement plate 2 and a test plate 22, the test plate 22 is located on the rear side of the placement plate 2, and a plurality of placement slots 3 are provided at the upper end of the placement plate 2, a plurality of test components are provided in the test plate 22, the test component comprises a test cavity 25 arranged in the test plate 22, a top plate 27 is provided in the test cavity 25, two contact pieces are provided on the front side of the top plate 27, the two contact pieces are in contact with the two pins of the varistor, so that the varistor can be connected to the circuit, the rear side of the top plate 27 is elastically connected to the rear inner wall of the test cavity 25 by two third springs 28, the front side of the test cavity 25 is provided with two through openings 26, the adjacent surfaces of the two columns 1 are fixedly connected with a horizontal plate 4, and a plurality of voltmeters 5 are provided on the upper end of the horizontal plate 4.

[0026] Among them, the horizontal plate 4 is provided with an automatic adjustment component, which is used to adjust the size of the voltage at both ends of the varistor. The adjustment component includes an adjustment cavity 6 arranged in the horizontal plate 4, and a drive motor is installed on the left side of the column 1 on the left. The drive motor is a servo motor and is provided with a controller, which can be controlled by the controller to control its forward and reverse rotation. The end of the drive motor output shaft extends into the adjustment cavity 6 and is fixedly connected with a threaded rod 7. The two ends of the threaded rod 7 are rotatably connected to the left and right inner walls of the adjustment cavity 6. The threaded layer part of the threaded rod 7 is threadedly connected with a moving block 8, and the moving block 8 is slidably connected to the inner wall of the adjustment cavity 6. A resistor plate 9 is installed on the inner top of the adjustment cavity 6, and a conductive plate 10 is installed on the inner bottom of the adjustment cavity 6. The right ends of the resistor plate 9 and the conductive plate 10 are electrically connected with wires. The resistor plate 9, the conductive plate 10 and the moving block 8 constitute an adjustment module.

[0027] Among them, a rotating assembly is provided in each of the two columns 1, and the two rotating assemblies are used to tilt the placement plate 2 so as to screen multiple varistors. The rotating assembly includes a vertical cavity 11 arranged in the column 1, and a slider 12 is provided in the vertical cavity 11. The slider 12 is slidably connected to the inner wall of the vertical cavity 11, and the lower end of the slider 12 is elastically connected to the inner bottom of the vertical cavity 11 through a first spring 13. A rack 20 is provided at the upper end of the slider 12, and a rotating rod 19 is provided in the vertical cavity 11. The two ends of the rotating rod 19 are rotatably connected to the left and right inner walls of the vertical cavity 11, and a gear 21 is provided on the rotating rod 19 to cooperate with the rack 20. A collection frame is provided between the two columns 1, and the two first springs 13 are conductive.

[0028] Among them, a control component is provided on the right side of the column 1 on the right side, and the control component includes a control box 14 arranged on the right side of the column 1, and a first electromagnet 15 is provided at the inner bottom of the control box 14. A control block 18 is provided in the control box 14, and the control block 18 is slidably connected to the inner wall of the control box 14. The adjacent surface of the control block 18 and the first electromagnet 15 is elastically connected through a second spring 16. The control block 18 is conductive, and conductive blocks 17 are provided on the inner walls of the left and right sides of the control box 14. An external power supply is provided, and the external power supply, the controller, the two conductive blocks 17, the control block 18 and the drive motor form a circuit.

[0029] Among them, the rear space of each test cavity 25 is connected to the outside world through the air inlet pipe 24. The rear space of the test cavity 25 is connected with multiple short tubes, and the multiple short tubes are connected to the outside world through the transverse tube 29. A one-way valve is provided on the multiple short tubes and the air inlet pipe 24. The external gas enters the test cavity 25 in one direction through the air inlet pipe 24, and the gas in the test cavity 25 enters the transverse tube 29 in one direction through the short tube. A sealing assembly is provided at the air outlet end of the transverse tube 29. A plurality of second electromagnets 23 are provided on the rear side of the test plate 22. Each top plate 27 is magnetic. When the second electromagnet 23 is energized, it repels the adjacent surface of the top plate 27 with the same polarity.

[0030] Among them, the sealing component includes a handle 30 arranged on the right side of the right column 1, a guide groove 32 is provided on the right side of the right column 1, and two guide blocks 33 are fixedly connected to the left side of the handle 30. The left ends of the two guide blocks 33 extend into the guide groove 32 and are slidably connected to the inner wall thereof. The left sides of the two guide blocks 33 are elastically connected to the left inner wall of the corresponding guide groove 32 through a fourth spring 34. A sealing rod 31 is fixedly connected to the left side of the handle 30, and the left end of the sealing rod 31 extends into the cross tube 29. The left side of the guide block 33 located at the rear side is provided with a pair of The left inner wall of the guide groove 32 is provided with a conductive rod 35, and the two conductive rods 35 constitute a conductive unit. A copper wire is provided in the guide block 33 located at the rear side. Conductive sheets 36 that match the copper wire are provided on the front and rear inner walls of the guide groove 32 located at the rear side. The two conductive sheets 36 and the copper wire constitute a conductive assembly. A control switch, an external power supply, a control switch, a conductive unit, an adjustment module, multiple varistors, multiple second electromagnets 23, a first electromagnet 15, a conductive assembly, two first springs 13 and a voltmeter 5 are provided. The electrical connections are as follows: Figure 6 shown.

[0031] The functional principle of the present invention can be explained through the following operation mode: in the initial state, since the multiple placement slots 3 are in a horizontal state, the varistor can be placed on the placement slot 3, and the pins of the varistor are located at the rear side. Then, the varistor is pushed backward so that the pins of the varistor pass through the through opening 26 and contact the corresponding two contact pieces. When the multiple varistors are installed, since the moving block 8 is located at the far left, the length of the resistor plate 9 connected to the circuit is longer, resulting in a larger resistance value of the resistor plate 9 connected to the circuit, and a larger voltage shared across the resistor plate 9.

[0032] When the current is turned on by the control switch, the conductive component is in the disconnected state and multiple varistors are connected in parallel. At this time, the voltage value across each varistor is the same. When the voltage across the varistor is lower than its threshold, the current flowing through it is extremely small, and it is equivalent to a resistor with infinite resistance. Therefore, there is no current flow in the circuit at this time.

[0033] Then, the driving motor is started. The start of the driving motor drives the threaded rod 7 to rotate, so that the moving block 8 continuously moves to the right, so that the length of the resistor plate 9 connected to the circuit is continuously reduced, and the resistance of the resistor plate 9 connected to the circuit is continuously reduced. Since the external power supply is set as a power supply that generates a stable voltage, the voltage in the circuit is constant, and then the voltage on both sides of the regulating component is continuously smaller. Since the voltage of the branch where the regulating component and the varistor are located is in a stable state, and since each varistor is connected in parallel, the voltage around each varistor is in a continuously increasing state.

[0034] When the voltage across the varistor exceeds its threshold, a large amount of electricity will be generated in the circuit immediately, thereby energizing the corresponding second electromagnet 23. After the second electromagnet 23 is energized, a repulsive force will be exerted on the corresponding top plate 27, causing the top plate 27 to move forward and push the pin out of the through-hole 26. At this time, since the contact piece and the pin are still in contact, the corresponding voltmeter 5 will produce an indication, and the staff can then record the threshold value of the corresponding varistor.

[0035] At the same time, when the second electromagnet 23 is energized, the first electromagnet 15 is energized, and then the attraction control block 18 moves downward and separates from the two conductive blocks 17. At this time, the drive motor is in a power-off state;

[0036] At the same time, the forward movement of the top plate 27 increases the space behind the test chamber 25 and reduces the air pressure. This allows outside air to enter the test chamber 25. After the varistor threshold is recorded, the handle 30 can be pulled, causing the handle 30 to move the sealing rod 31 to the right. At this point, the two conductive rods 35 are disengaged, and the multiple second electromagnets 23 are all de-energized.

[0037] When the sealing rod 31 is separated from the cross tube 29, the top plate 27 moves back under the elastic action of the corresponding third spring 28. At this time, the corresponding varistor is in a power-off state. Since the sealing rod 31 moves rightward, the two guide blocks 33 move rightward, causing the copper wire to contact the two conductive sheets 36. At this time, the first electromagnet 15 is still in a conducting state, and the two first springs 13 are also in a conducting state.

[0038] After the two first springs 13 are energized, each coil generates a magnetic field, and the magnetic fields generated by every two adjacent coils are in opposite directions. Every two adjacent coils generate mutual attraction, which causes the first springs 13 to contract and drive the slider 12 and the rack 20 to move downward, thereby driving the placement plate 2 to rotate downward through the gear 21. Since the inner walls of the multiple openings 26 are relatively rough, when the placement plate 2 is tilted, the corresponding pins of the varistor are ejected and slide into the corresponding collection frame;

[0039] When the collection is completed, a new collection frame is placed under the placement plate 2. The handle 30 is released, so that the sealing rod 31 re-enters the transverse tube 29 for sealing. At this time, the branch where the varistor is located is disconnected again, and the conductive component is also disconnected. At this time, the first electromagnet 15 is powered off again, so that the control block 18 moves up, and the drive motor is started again to detect the threshold value of the remaining varistor (when the remaining varistor is detected, the two first springs 13 are also in the power-off state. Therefore, under the elastic action of the first spring 13, the slider 12 moves up, thereby rotating the placement plate 2 upward;

[0040] When the threshold value of the remaining varistor is reached again, the above process can be repeated. When the detection is completed, the drive motor is controlled to drive the threaded rod 7 to rotate counterclockwise, so that the moving block 8 moves back for the next batch detection.

[0041] Compared with the prior art, by setting up multiple test cavities 25 and contact pieces, after the varistors are placed, multiple varistors are connected in parallel, so that the thresholds of multiple varistors can be tested at the same time, thereby improving the test effect of the varistors;

[0042] By setting the second electromagnet 23 and the rotating assembly, the varistor with the tested threshold value can be ejected, and then the varistor with the same threshold value can be collected, so that the varistor with different threshold values ​​can be collected during batch testing;

[0043] By adjusting the setting of the component, the movement block 8 can be driven to move slowly by the operation of the driving motor, thus eliminating the need for manual adjustment and greatly reducing the workload of the tester. At the same time, the driving motor is controlled by the control component, making the response faster and thus making the test results more accurate.

[0044] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A test and screening device for varistor used in production of intelligent power distribution system, comprising two columns (1), characterized in that: The adjacent surfaces of the two upright posts (1) are fixedly connected to a placement plate (2) and a test plate (22), the test plate (22) is located on the rear side of the placement plate (2), the upper end of the placement plate (2) is provided with a plurality of placement slots (3), the test plate (22) is provided with a plurality of test components, the test components include a test cavity (25) arranged in the test plate (22), a top plate (27) is provided in the test cavity (25), the front side of the top plate (27) is provided with two contact pieces, the rear side of the top plate (27) is elastically connected to the rear inner wall of the test cavity (25) through two third springs (28), the front side of the test cavity (25) is provided with two through openings (26), the adjacent surfaces of the two upright posts (1) are fixedly connected to a horizontal plate (4), the upper end of the horizontal plate (4) is provided with a plurality of voltmeters (5); An automatic adjustment component is provided in the transverse plate (4), and the automatic adjustment component is used to adjust the voltage across the varistor; A rotating assembly is provided in each of the two upright posts (1), and the two rotating assemblies are used to tilt the placement plate (2) so as to screen a plurality of varistors; The adjustment assembly includes an adjustment cavity (6) arranged in the transverse plate (4), a drive motor is installed on the left side of the column (1) located on the left side, and the end of the output shaft of the drive motor extends into the adjustment cavity (6) and is fixedly connected to a threaded rod (7); A control assembly is provided on the right side of the column (1) located on the right side, the control assembly comprising a control box (14) provided on the right side of the column (1), a first electromagnet (15) provided at the inner bottom of the control box (14), a control block (18) provided in the control box (14), the control block (18) being slidably connected to the inner wall of the control box (14), the adjacent surface of the control block (18) and the first electromagnet (15) being elastically connected via a second spring (16), the control block (18) being conductive, and conductive blocks (17) being provided on both the left and right inner walls of the control box (14); The rear space of each test cavity (25) is connected to the outside world through an air inlet pipe (24), the rear space of the test cavity (25) is connected to a plurality of short tubes, the plurality of short tubes are connected to the outside world through a transverse tube (29), a one-way valve is provided on the plurality of short tubes and the air inlet pipe (24), a sealing assembly is provided at the air outlet end of the transverse tube (29), a plurality of second electromagnets (23) are provided on the rear side of the test plate (22), and each of the top plates (27) has magnetism; The varistor is connected to the circuit by bringing two pins of the varistor in the placement slot (3) into contact with the contact piece. The voltage across the varistor is changed by adjusting the automatic adjustment component, thereby driving the second electromagnet (23) to be energized to generate a repulsive force, causing the top plate (27) to move forward and push the varistor pins out of the opening to determine the varistor threshold. When the second electromagnet (23) is energized, the first electromagnet (15) is energized, thereby de-energizing the drive motor. After the threshold of the varistor is recorded, the handle is pulled to de-energize the second electromagnet (23).

2. The test and screening equipment for varistors used in production of intelligent power distribution systems according to claim 1, characterized in that: The two ends of the threaded rod (7) are rotatably connected to the inner walls of the left and right sides of the regulating chamber (6); the threaded layer portion of the threaded rod (7) is threadedly connected to a moving block (8); the moving block (8) is slidably connected to the inner wall of the regulating chamber (6); a resistor plate (9) is installed at the inner top of the regulating chamber (6); and a conductive plate (10) is installed at the inner bottom of the regulating chamber (6).

3. The test and screening equipment for varistors used in production of intelligent power distribution systems according to claim 1, characterized in that: The rotating assembly comprises a vertical cavity (11) arranged in a column (1), a slider (12) is provided in the vertical cavity (11), the slider (12) is slidably connected to the inner wall of the vertical cavity (11), the lower end of the slider (12) is elastically connected to the inner bottom of the vertical cavity (11) via a first spring (13), the upper end of the slider (12) is provided with a rack (20), a rotating rod (19) is provided in the vertical cavity (11), the two ends of the rotating rod (19) are rotatably connected to the left and right inner walls of the vertical cavity (11), the rotating rod (19) is provided with a gear (21) matched with the rack (20), and a collection frame is provided between the two columns (1).

4. The test and screening equipment for varistors used in production of intelligent power distribution systems according to claim 1, characterized in that: The sealing assembly includes a handle (30) arranged on the right side of the right column (1), a guide groove (32) is provided on the right side of the column (1) on the right side, two guide blocks (33) are fixedly connected to the left side of the handle (30), the left ends of the two guide blocks (33) extend into the guide groove (32) and are slidably connected to the inner wall thereof, the left sides of the two guide blocks (33) are elastically connected to the left inner wall of the corresponding guide groove (32) through a fourth spring (34), and a sealing rod (31) is fixedly connected to the left side of the handle (30), and the left end of the sealing rod (31) extends into the transverse tube (29).

5. The test and screening equipment for varistors used in production of intelligent power distribution systems according to claim 4, characterized in that: A corresponding guide groove (32) is provided on the left side of the guide block (33) located at the rear side, a conductive rod (35) is provided on the left inner wall of the guide groove (32), a copper wire is provided in the guide block (33) located at the rear side, and conductive sheets (36) matching the copper wire are provided on the front and rear inner walls of the guide groove (32) located at the rear side.

Images