Arrester alternating current and direct current automatic test device and use method

Abstract

The invention belongs to the technical field of lightning arrester alternating-current and direct-current testing, and discloses a lightning arrester alternating-current and direct-current automatic testing device and a using method.The device comprises a supporting frame, an outer guide rail and an inner guide rail are installed at the top of the supporting frame, a transmission mechanism is installed on the inner side of the inner guide rail, and the transmission mechanism is provided with a toothed chain; a plurality of trays are connected to the toothed chain, the bottoms of the trays make contact with the outer guide rail, and the trays and the inner guide rail slide in a clamped mode through idler wheels. While the toothed chain and the tray are rotated through the first transmission gear, alternating current and direct current power supplies are automatically connected through the linear motion mechanism for alternating current and direct current measurement, detection is facilitated, the overall practicability is improved, the test efficiency is improved, and the safety of testers is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of AC and DC tests for lightning arresters, and in particular relates to an AC and DC automated testing device for lightning arresters and a use method thereof. Background Art

[0002] The power frequency reference voltage test, continuous current test, DC reference voltage test, and leakage current test under 0.75 times DC reference voltage can be used to detect whether the performance of the lightning arrester is normal. The test helps to discover possible defects in the lightning arrester, such as moisture, aging, and deterioration. The power frequency reference voltage test and DC reference voltage test can verify whether the protection level of the lightning arrester meets the design requirements, ensuring that it can effectively limit overvoltage in the power system, ensuring the safe and stable operation of power equipment, helping to discover potential faults in advance, reducing the probability of power system failures, and improving the reliability and stability of the power system.

[0003] In the existing test methods, frequent AC / DC switching requires operations such as disconnecting / connecting wires, closing / opening door interlocks, opening / closing transformers and step-up / step-down voltage regulators, which easily introduces the risk of human operational errors, increases equipment losses, shortens the service life of equipment, and causes the entire test process to consume more time, reduces work efficiency, prolongs the test time, and affects data stability.

[0004] The Chinese patent publication number is CN114993375A, and the name is the patent application for the automatic detection system and detection method of lightning arrester. The detection line of the detection system drives the lightning arrester to the mechanical detection station through the tray to carry out the mechanical inspection of the lightning arrester; the detection line drives the lightning arrester to the electrical comprehensive test station for electrical comprehensive test; the mechanical arm grabs the lightning arrester to the sealing test station for the lightning arrester sealing test; the mechanical arm grabs the lightning arrester to the spray cleaning station for cleaning, and the mechanical arm places the cleaned lightning arrester back on the corresponding tray on the detection line; the detection line transfers the lightning arrester after spray cleaning to the drying station for drying; the detection line transfers the lightning arrester to the electrical comprehensive test station again; the detection line transfers the lightning arrester that has undergone electrical comprehensive test again to the high-voltage test station for lightning impulse test. The detection line of this patent application occupies a large area and the detection process is complicated, which is not convenient for conducting related tests with electricity. Summary of the invention

[0005] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an AC / DC automated testing device for lightning arresters and a method of use. The device can automatically perform multiple tests on multiple lightning arrester samples through a wire frame with cables, thereby improving test efficiency and ensuring the safety of test personnel.

[0006] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides an AC / DC automated testing device for a lightning arrester, comprising a support frame, wherein an outer guide rail and an inner guide rail are installed on the top of the support frame; a transmission mechanism is installed on the inner side of the inner guide rail, wherein the transmission mechanism has a tooth chain, wherein the tooth chain is connected to a plurality of trays, wherein the bottom of the trays is in contact with the outer guide rail; and an induction switch is installed in the tray.

[0007] Optionally, the outer guide rail and the inner guide rail are both rectangular frames with short sides convex outwards.

[0008] Optionally, the transmission mechanism also includes a first transmission gear, a second transmission gear and a motor, one of the first transmission gear or the second transmission gear is installed on the output shaft of the motor, and the other has a rotating shaft at the center, and the first transmission gear and the second transmission gear are both arranged inside the toothed chain and meshed with the toothed chain.

[0009] Optionally, a first connecting plate and a second connecting plate are fixedly mounted on the inner guide rail, and the motor is fixed to the bottom of the first connecting plate or the bottom of the second connecting plate; the rotating shaft and the output shaft of the motor pass through the first connecting plate and the second connecting plate respectively.

[0010] Optionally, an outer transmission rail is fixedly installed on the top of the outer guide rail; and an inner transmission rail is fixedly installed on the top of the inner guide rail.

[0011] Optionally, the lower surface of the tray is provided with one or more combinations of bumps or rollers, the bottom of the bump is slidably connected to the top of the outer transmission rail; the roller is slidably connected to the outer side of the inner guide rail.

[0012] Optionally, the tray is connected to the toothed chain via a connecting piece, wherein the connecting piece is a plate fixedly mounted on the toothed chain, and one end of the connecting piece away from the toothed chain is connected to the tray.

[0013] Optionally, a lightning arrester is placed on the tray, and a linear motion mechanism is arranged above the detection station corresponding to the tray.

[0014] Optionally, universal wheels are installed at the bottom of the support frame.

[0015] In a second aspect, the present invention provides a method for using the above-mentioned AC / DC automatic test device for lightning arresters, comprising the following steps: Place the product to be tested on the tray and connect the ground terminal; Turn on the transmission mechanism, drive the tray to move along the toothed chain through the toothed chain, and drive the test object to rotate to the designated test station; Identify the information of the pallet through the passive induction switch on the test station; The information of the pallet is identified by the passive induction switch and the AC power supply or DC power supply is connected through the linear motion mechanism, so that the sample on the pallet can be detected while the transmission is in progress.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an AC / DC automatic test device for lightning arresters and a method for using the same. When the AC / DC automatic test device for lightning arresters is used, a transmission mechanism is provided, and while the toothed chain and the tray are rotated by the first transmission gear, a DC or AC power supply is connected to the circuit by pressing on the test piece through a linear motion mechanism, which is convenient for detection, increases overall practicality, improves test efficiency, and ensures the safety of test personnel.

[0017] Furthermore, the present invention is also provided with a first connecting plate and a second connecting plate, and a protrusion is provided at the bottom of the tray, so that the sample can be more stable when the tray rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 It is a schematic diagram of the shaft side surface structure of the present invention; Figure 2 It is a schematic diagram of a top-view cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the structure of the inner guide rail of the present invention when viewed from above; Figure 4 It is a schematic diagram of the shaft side surface structure of the toothed chain of the present invention; Figure 5 It is a schematic diagram of the explosion structure of the present invention; Figure 6 Schematic diagram of the explosion structure of the pallet surface of the present invention Figure 7 A schematic diagram of a tray according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the linear motion mechanism of the present invention.

[0019] In the figure: 1. support frame; 2. outer guide rail; 3. inner guide rail; 4. first connecting plate; 5. second connecting plate; 6. first transmission gear; 7. second transmission gear; 8. tooth chain; 9. motor; 10. inner transmission rail; 11. outer transmission rail; 12. tray; 13. connecting piece; 14. linear motion mechanism; 15. lightning arrester. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] When an element is referred to as being "disposed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiments. If the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but it can be slightly tilted.

[0024] It should be noted that similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In the description of the present invention, it is understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular forms of "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0026] The present invention is described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, an AC / DC automatic test device for a lightning arrester of the present invention comprises a support frame 1, an outer guide rail 2 and an inner guide rail 3 are installed on the top of the support frame 1; a transmission mechanism is installed on the inner side of the inner guide rail 3, and the transmission mechanism has a tooth chain 8, and a plurality of trays 12 are connected to the tooth chain 8, and the bottom of the tray 12 is in contact with the outer guide rail 2; an induction switch is installed in the tray 12.

[0028] A method for using an AC / DC automatic test device for a lightning arrester according to the present invention comprises the following steps: Place the test object on the tray 12 and ground it reliably; Set relevant parameters; Turn on the transmission mechanism, drive the tray 12 to move along the toothed chain 8 through the toothed chain 8, and drive the test object to rotate to the test station of the DC power supply or the industrial frequency power supply; Identify information of the tray 12 through a passive induction switch on the test station; The DC or AC power source is connected through the linear motion mechanism 14 so that the sample on the tray 12 can be tested while being driven.

[0029] The commonly used mechanical arm and assembly line mode in the prior art grabs the arrester 15 to be tested and places it in the test area for testing in sequence. The current mechanical arm and assembly line mode has a large construction cost and occupies a large area. When conducting the test, the test samples need to be grabbed in sequence for testing, and the test of a single sample takes a long time.

[0030] The present invention discloses an AC / DC automatic test device for lightning arresters and a method for using the same. When the AC / DC automatic test device for lightning arresters is used, a transmission mechanism is provided. While the toothed chain and the tray are rotated by the first transmission gear, the information of the tray 12 is identified by the passive induction switch to determine whether the AC / DC power supply is connected through the linear motion mechanism 14, which is convenient for detection, increases overall practicality, improves test efficiency, and ensures the safety of test personnel.

[0031] Example 1 The tray 12 can be driven to rotate by the second transmission gear 7, specifically: An AC and DC automatic testing device for a lightning arrester comprises a supporting frame 1.

[0032] Optionally, universal wheels are installed at the bottom of the support frame 1.

[0033] Specifically, the support frame 1 includes a bottom rectangular frame, and a top rectangular frame is connected to the top of the bottom rectangular frame through a support column.

[0034] An outer guide rail 2 and an inner guide rail 3 are fixedly mounted on the upper surface of the support frame 1 .

[0035] Specifically, the outer guide rail 2 and the inner guide rail 3 are both installed on the top rectangular frame of the support frame 1 .

[0036] The outer guide rail 2 and the inner guide rail 3 are both axisymmetric closed wire frames.

[0037] Optionally, the outer guide rail 2 is a rectangular frame with outwardly convex short sides. Further, the outer guide rail 2 has a set of parallel long sides of equal length, wherein the long side is a side whose length is greater than the spacing with another parallel side. The ends of the two long sides are connected by three sides of the same length, and the angle between two adjacent sides of the three sides is 135°.

[0038] Optionally, the inner guide rail 3 has the same shape as the outer guide rail 2 and is a wireframe of the outer guide rail 2 in a proportionally reduced size. The inner guide rail 3 is arranged inside the outer guide rail 2. Optionally, the inner guide rail 3 is arranged at the center of the outer guide rail 2.

[0039] A transmission mechanism is installed inside the inner guide rail 3 , and the transmission mechanism can rotate the tray 12 through the first transmission gear 6 and the second transmission gear 7 .

[0040] The transmission mechanism includes a first transmission gear 6 , a second transmission gear 7 , a toothed chain 8 and a motor 9 .

[0041] The second transmission gear 7 is installed on the output shaft of the motor 9. The second transmission gear 7 is connected to the first transmission gear 6 through the toothed chain 8. The first transmission gear 6 and the second transmission gear 7 are both arranged inside the toothed chain 8, and the first transmission gear 6 and the second transmission gear 7 are both meshed with the toothed chain 8.

[0042] A first connecting plate 4 and a second connecting plate 5 are fixedly mounted on the upper surface of the inner guide rail 3 .

[0043] Specifically, the first connecting plate 4 and the second connecting plate 5 are respectively fixedly mounted on the two ends of the long axis of the inner guide rail 3. The first connecting plate 4 and the second connecting plate 5 are symmetrically arranged along the center line of the inner guide rail 3.

[0044] Optionally, the motor 9 is fixed on the lower surface of the second connecting plate 5 .

[0045] A rotating shaft is connected to the center of the first transmission gear 6 , and the rotating shaft passes through the upper surface of the first connecting plate 4 ; the output shaft of the motor 9 passes through the upper surface of the second connecting plate 5 .

[0046] The outer side of the toothed chain 8 is connected to a plurality of trays 12 via a connecting piece 13 .

[0047] Specifically, the tray 12 is slidably connected to the outer side of the inner guide rail 3 via rollers.

[0048] Optionally, a plurality of trays 12 are arranged in a circular pattern at equal intervals along the toothed chain 8 .

[0049] In this embodiment, six trays 12 are installed at equal intervals.

[0050] A lightning arrester 15 is placed on the tray 12, and a linear motion mechanism 14 is arranged above the detection station corresponding to the outer guide rail 2. Optionally, the linear motion mechanism 14 is an electric cylinder or a pneumatic cylinder. The linear motion mechanism 14 is electrically connected to a high-voltage power transmission device of direct current or alternating current. A pressure sensor is arranged at the bottom of the linear motion mechanism 14. The power output position of the direct current or alternating current high-voltage power transmission device does not need to be fixed, and different trays 12 can be docked at will.

[0051] like Figure 7 As shown, in this embodiment, any one of the induction switches a to f is installed in the six trays 12, and the induction switches with different numbers represent different trays 12. All matching identification codes from a to f are placed at the corresponding high-voltage DC output positions and high-voltage AC output positions to represent the induction switches. When the tray 12 is rotated to the corresponding position, the induction switch and the induction switch on the high-voltage output station can be inductively connected.

[0052] The AC and DC automatic test device for lightning arresters of this embodiment, when used, comprises the following steps: The samples to be tested are placed on the upper surfaces of the six trays 12 in sequence. The samples are placed on the upper surfaces of the trays 12 , and the trays 12 are mounted on the toothed chain 8 via the connecting pieces 13 .

[0053] Turn on the motor 9, and drive the second transmission gear 7 to rotate through the output shaft of the motor 9. Since the outer surface of the second transmission gear 7 is meshed with the toothed chain 8, and the toothed chain 8 is meshed with the first transmission gear 6, the toothed chain 8 can rotate, and the toothed chain 8 drives the first transmission gear 6 to rotate, so that the tray 12 moves along the toothed chain 8 and drives the test product to rotate to the designated test station for testing.

[0054] The information of the induction switch in the tray 12 is recognized by the passive induction switch on the test station, the corresponding required test content is determined and a DC or AC power supply is connected through the linear motion mechanism 14 .

[0055] The first connecting plate 4 and the second connecting plate 5 can make the transmission of the toothed chain 8 more stable, make the overall transmission inspection more stable, and can realize automatic or semi-automatic operation, reducing the time and labor intensity of manual intervention, thereby significantly improving the efficiency of the test, and helping to cooperate with the data acquisition system to obtain more comprehensive and accurate test data.

[0056] Example 2 The AC and DC automatic testing device for lightning arresters of the present embodiment further includes a testing structure, which enables the test product to be tested on the upper surface of the tray 12, thereby improving the testing efficiency.

[0057] The test structure is disposed on the upper surfaces of the first connecting plate 4 and the second connecting plate 5 , and the test structure enables the test sample to be subjected to AC and DC tests while the tray 12 is rotating.

[0058] The test structure includes an inner sliding rail 10 and an outer sliding rail 11 .

[0059] Optionally, the inner sliding rail 10 and the outer sliding rail 11 are both elliptical structures.

[0060] The outer sliding rail 11 is fixedly mounted on the upper surface of the outer guide rail 2 .

[0061] The inner sliding rail 10 is fixedly mounted on the upper surface of the inner guide rail 3 .

[0062] The tray 12 is provided with a protrusion on its lower surface, and the lower surface of the protrusion is in sliding contact with the upper surface of the outer sliding rail 11 .

[0063] When the tray 12 rotates, the protrusion on the lower surface will contact the outer sliding rail 11, making the tray 12 more stable. The lower surface of the tray 12 will contact the inner sliding rail 10 and will be slidably connected to the outer side of the inner track 3 through rollers, so that the elliptical ring structure of the tray 12 will rotate, making the rotation of the tray 12 stable.

[0064] When the tray 12 is used to support the test piece and rotate it to the expected position, when switching to different test types, the linear motion mechanism 14 is operated to connect to a DC or AC power supply to perform the test, so that the test efficiency is higher.

[0065] In this embodiment, the number of trays 12 is 6, which can perform multi-station operations, improve the efficiency of detection, avoid frequent AC / DC switching, simplify the operating process to reduce the risk of errors, and reduce the electrical and mechanical stress caused by AC / DC conversion on the test equipment, increase the service life of the equipment, improve work efficiency, make the test data more stable, reduce the impact of mechanical failures on the test, and ensure the long-term stable operation of the test equipment.

[0066] The device of this embodiment has an elliptical structure, and six stations for trays 12 are arranged at equal intervals on the outer sliding rail 11, which can realize multi-station detection and improve test efficiency.

[0067] This embodiment can realize the power frequency and direct current testing of the test product while the tray rotates, thereby improving the test efficiency, reducing the frequent AC / DC switching, wire removal, wiring, closing, opening door connections, opening and closing transformers and step-up / step-down voltage regulator operations, reducing the risk of human operating errors, ensuring the safety of test personnel, reducing equipment loss, and increasing the service life of the equipment.

[0068] Example 3 The AC / DC automatic testing device for lightning arresters of this embodiment further includes a control unit.

[0069] Specifically, the control unit has a PLC control system, the control unit is communicatively connected to an electrical parameter monitoring device, and the PLC control system is connected to an induction switch of the tray 12 and a linear motion mechanism 14 .

[0070] The AC and DC automatic test device for lightning arresters of this embodiment performs the following automatic control steps during testing: Step 1: First select the type of test through the control unit, select the power frequency reference voltage test, continuous current test, DC reference voltage, leakage current test under 0.75 times DC reference voltage, input the test parameters, and determine the position of the test product in the transmission device; Step 2: Select a corresponding test instrument, and electrically connect the electrical parameter monitoring device to the test instrument.

[0071] The test instruments include but are not limited to resistive current meter LCD-4D, oscilloscope MDO3022, and Macon meter.

[0072] Step 3: Then, the control unit inputs the parameter models of the products to be tested corresponding to different trays 12 , wherein the parameter models include the commissioned test number, the test stage, the test number and the collection time.

[0073] Step 4: Start the test, the control unit controls the transmission mechanism to rotate, and the transmission mechanism rotates at a fixed step and speed through the PLC control motor 9 according to the preset program. The trays 12 are transferred to the AC or DC station one by one according to the preset position.

[0074] Step 5: The motor 9 stops rotating, the induction switch in the tray 12 automatically matches the induction switch corresponding to the device, and the matching code is fed back to the control unit through the PLC system.

[0075] Step 6: The control unit determines whether the arrester 15 placed on the tray 12 has been written with input data. If the data has been written, the test is terminated and the test personnel are called by a buzzer. If the input data has not been written, the control unit will control the device to perform the test according to step 7.

[0076] Step 7: The control unit receives the signal and controls it through the PLC system Figure 8 The linear motion mechanism 14 shown is connected to the lightning arrester 15. When the pressure sensor of the linear motion mechanism 14 transmits a signal to the control unit, automatic measurement will be performed. When there is no feedback from the pressure sensor within 1 minute, the control unit will alarm to prompt personnel to check.

[0077] Step 8: The control unit automatically performs a voltage boost operation according to a preset value, and stops boosting when the current or voltage value reaches the preset value.

[0078] Step nine: 2 seconds after stopping the boost, the control unit controls the measuring instrument to record data, and collects the recorded data through the electrical parameter monitoring device.

[0079] Step 10: After the data recording is completed, the control unit controls the voltage to be reduced to zero voltage or the lowest voltage.

[0080] Step 11: After confirming that the voltage has been reduced to zero voltage or the lowest voltage, the control unit controls the high-voltage power transmission equipment electrically connected to the linear motion mechanism 14 to open the switch and lift the linear motion mechanism 14 .

[0081] Step 12: When the AC and DC equipment lift the linear motion mechanism at the same time, repeat the above-mentioned process of rotating the transmission mechanism and repeat step 4 and subsequent steps.

[0082] Lightning arrester 15: An electrical device used to protect electrical equipment from high transient overvoltage hazards and limit the amplitude of the follow-on current. Power frequency reference voltage: The peak value of the power frequency voltage between the terminals of the lightning arrester 15 measured when the power frequency reference current flows through the lightning arrester 15 divided by Continuous current: The current flowing through the arrester 15 when the continuous operating voltage is applied. DC reference voltage: The average value of the DC voltage between the terminals of the arrester 15 measured when the DC reference current flows through the arrester 15. Leakage current at 0.75 times the DC reference voltage: The leakage current flowing through the arrester 15 at 0.75 times the DC reference voltage.

[0083] An AC / DC automated testing device for lightning arresters of the present invention can automatically perform power frequency reference voltage tests, continuous current tests, DC reference voltage tests, and leakage current tests at 0.75 times the DC reference voltage on multiple lightning arrester 15 test pieces, thereby improving test efficiency, ensuring the safety of test personnel, reducing the floor space occupied by the equipment, reducing frequent AC / DC switching, disconnection / connection of wires, closing / opening of door connections, opening / closing of transformers and step-up / step-down voltage regulator operations, and the like, thereby improving equipment utilization, reducing equipment loss, increasing equipment service life, reducing costs, and improving personnel unit production efficiency, while reducing the risk of electric shock when personnel frequently enter the test area to replace test pieces.

[0084] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An AC and DC automatic test device for lightning arresters, characterized in that: The invention comprises a support frame (1), wherein an outer guide rail (2) and an inner guide rail (3) are mounted on the top of the support frame (1); a transmission mechanism is mounted on the inner side of the inner guide rail (3); the transmission mechanism comprises a toothed chain (8); the toothed chain (8) is connected to a plurality of trays (12); the bottom of the tray (12) is in contact with the outer guide rail (2); and an induction switch is mounted in the tray (12).

2. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: The outer guide rail (2) and the inner guide rail (3) are both rectangular frames with short sides convex outwards.

3. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: The transmission mechanism further comprises a first transmission gear (6), a second transmission gear (7) and a motor (9); one of the first transmission gear (6) or the second transmission gear (7) is mounted on an output shaft of the motor (9); the other has a rotation axis at its center; and the first transmission gear (6) and the second transmission gear (7) are both arranged inside the toothed chain (8) and meshedly connected with the toothed chain (8).

4. The AC and DC automatic test device for lightning arresters according to claim 3, characterized in that: A first connecting plate (4) and a second connecting plate (5) are fixedly mounted on the inner guide rail (3); the motor (9) is fixed to the bottom of the first connecting plate (4) or the bottom of the second connecting plate (5); the rotating shaft and the output shaft of the motor (9) pass through the first connecting plate (4) and the second connecting plate (5) respectively.

5. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: An outer transmission rail (11) is fixedly mounted on the top of the outer guide rail (2); and an inner transmission rail (10) is fixedly mounted on the top of the inner guide rail (3).

6. The AC and DC automatic test device for lightning arresters according to claim 5, characterized in that: The lower surface of the tray (12) is provided with one or more combinations of bumps or rollers, the bottom of the bumps is slidably connected to the top of the outer transmission rail (11); the rollers are slidably connected to the outer side of the inner guide rail (3).

7. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: The tray (12) is connected to the toothed chain (8) via a connecting piece (13); the connecting piece (13) is a plate fixedly mounted on the toothed chain (8); and one end of the connecting piece (13) away from the toothed chain (8) is connected to the tray (12).

8. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: A lightning arrester (15) is placed on the tray (12), and a linear motion mechanism (14) is arranged above the detection station corresponding to the tray (12).

9. The AC and DC automatic test device for lightning arresters according to claim 1, characterized in that: Universal wheels are installed at the bottom of the support frame (1).

10. A method for using the AC / DC automatic test device for lightning arresters according to any one of claims 1 to 9, characterized in that: The following steps are involved: Place the test object on the tray (12) and connect the ground terminal; The transmission mechanism is turned on, and the tray (12) is driven to move along the toothed chain (8) via the toothed chain (8), and the test object is driven to rotate to a designated test station; Identifying information of the tray (12) through a passive induction switch on the test station; The information of the tray (12) is identified by the passive induction switch, and an AC power source or a DC power source is connected through the linear motion mechanism (14), so that the test piece on the tray (12) is detected while being driven.

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