Portable auxiliary device for batch test of 10kV lightning arresters

Abstract

The invention relates to a portable auxiliary device for batch test of 10kV lightning arresters. The portable auxiliary device sequentially comprises a foldable support frame, a rotary base and a manual lifting rod from bottom to top, the support frame is an electric lifting rod for lifting the rotary base and the manual lifting rod; the top end of the supporting frame is sleeved with the rotating base, the rotating motor is in transmission connection with the rotating base, the rotating base is provided with a plurality of mounting strips arrayed in the circumferential direction of the supporting frame, and the length directions of the mounting strips are arranged in the radial direction of the supporting frame; three clamping grooves for fixing lightning arrester flange plates of the lightning arresters are formed in the mounting strips; the motor driving module is used for adjusting the lifting height of the supporting frame and the rotating angle of the rotating base. The wireless remote control module is used for remotely controlling the motor driving module; a high-voltage electrode array of the high-voltage electrode corresponds to the three clamping grooves and is used for synchronously applying test voltage; and the grounding end integrated board module is used for realizing parallel connection and electrification of a plurality of lightning arresters. The auxiliary device is portable and safe, and batch testing of lightning arresters is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment testing, and in particular to an auxiliary device for batch testing of portable 10kV lightning arresters. Background Art

[0002] Since the 10kV lightning arrester is installed in the switch cabinet or on the outer cross arm of the outgoing line wall bushing, the lightning arrester test needs to be removed from the installation base and placed upright. The existing technology lacks a special supporting device. Testers often use temporary objects to support the lightning arrester upright to complete the test, such as bricks, chairs and other temporary objects built on site for support testing. The use of temporary objects cannot form a unified standard, cannot ensure good grounding of the lightning arrester, cannot meet the test conditions of the lightning arrester, affect the accuracy of the test data, and make it difficult to ensure test safety. The lightning arrester is prone to tipping over during the test, causing the test to be interrupted, or causing the high-voltage DC generator to tip over, and the safe distance between the high-voltage lead and the ground cannot be guaranteed, causing personal and equipment accidents to the test personnel.

[0003] Temporary support structures (e.g. bricks, chairs) have the following defects:

[0004] (1) Poor stability: It can easily cause the arrester to fall over, causing equipment damage or test interruption;

[0005] (2) Unreliable grounding: Temporary supports cannot achieve standardized grounding, resulting in leakage current measurement errors;

[0006] (3) Insufficient safety distance: When the arrester is tilted, the distance between the high-voltage lead and the ground may be lower than the safety standard (e.g. <0.6m);

[0007] (4) Complicated operation: Test personnel need to repeatedly adjust the position of the lightning arrester, which prolongs the on-site operation time.

[0008] In summary, there is an urgent need to design a portable batch test auxiliary device. Summary of the Invention

[0009] The purpose of the present invention is to provide a batch testing device for lightning arresters with electrically adjustable height and angle, so as to realize synchronous testing of multiple lightning arresters, reduce manual intervention, and improve test efficiency and safety.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A portable auxiliary device for batch testing of 10kV lightning arresters, comprising, from bottom to top, a foldable support frame, a rotatable rotating base and a manual lifting rod;

[0012] The support frame is an electric lifting rod and is used to lift the rotating base and the manual lifting rod;

[0013] The rotating base is sleeved on the outside of the top end of the support frame and is connected to the rotating base by a rotating motor. The rotating base is provided with a plurality of mounting bars arranged along the circumferential direction of the support frame, and the length direction of the mounting bars is arranged along the radial direction of the support frame;

[0014] The mounting bar is provided with three slot holes for fixing the arrester flange of the arrester;

[0015] The bottom end of the manual lifting rod is fixedly connected to the top end of the support frame;

[0016] It also includes a motor drive module, a wireless remote control module, a high-voltage electrode, a grounding terminal integrated board module and a safety protection module;

[0017] The motor drive module is used to adjust the lifting height of the support frame and the rotation angle of the rotating base;

[0018] The wireless remote control module is used to remotely control the motor drive module;

[0019] The high-voltage electrode array of the high-voltage electrode is arranged corresponding to the three card slot holes for synchronously applying the test voltage;

[0020] The grounding terminal integrated board module is used to realize parallel connection of multiple lightning arresters.

[0021] Furthermore, the grounding terminal integrated board module includes multiple grounding electrodes arranged on the mounting bar and a grounding terminal integrated board arranged on the rotating base. The grounding electrodes automatically contact the lightning arrester grounding terminal through spring contacts, and all the grounding electrodes are connected to the grounding terminal integrated board.

[0022] Furthermore, the grounding resistance of the grounding electrode is ≤0.1Ω.

[0023] Furthermore, the grounding terminal integrated board adopts a copper bus parallel structure.

[0024] Furthermore, the number of the mounting bars is eight.

[0025] Furthermore, the safety protection module includes a tilt sensor arranged at the bottom of the support frame, which automatically cuts off the high voltage and alarms when the tilt angle of the lightning arrester is greater than 5°.

[0026] Furthermore, the high-voltage electrode array of the high-voltage electrode adopts a spring contact structure, and the adjustable range of the contact pressure is 5-10N.

[0027] Furthermore, it also includes a slot hole gasket detachably connected to the slot hole, and the slot hole gasket is used to change the aperture of the slot hole.

[0028] Furthermore, the distance between the high-voltage lead on the high-voltage electrode and the ground is stably ≥0.8m.

[0029] In the above technical solution, the present invention provides the following beneficial effects:

[0030] The auxiliary device of the present invention electrically adjusts the height of the support base and the angle of the rotating base. This device is portable, safe, and fast, meeting regulatory requirements and reducing frequent line changes. It enables batch testing of 10kV zinc oxide arresters, reduces labor intensity, improves work efficiency, and addresses irregularities that can occur during on-site testing of 10kV zinc oxide arresters, ensuring both personal and equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0032] Figure 1 A schematic diagram of the three-dimensional structure of the auxiliary device proposed by the present invention;

[0033] Figure 2 A top view of the slot hole of the rotating base proposed by the present invention;

[0034] Figure 3 Schematic diagram of the planar structure of the auxiliary device proposed by the present invention.

[0035] In the figure: a support frame 1, a rotating base 2, a driven gear 21, a rotating motor 22, a mounting bar 24, an outer frame 25, a slot hole 241, a manual lifting rod 3, and a high-voltage electrode 4. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-3 The portable auxiliary device for batch testing of 10kV lightning arresters shown comprises, from bottom to top, a foldable support frame 1, a rotatable rotating base 2 and a manual lifting rod 3.

[0038] Among them, the support frame 1 is an electric lifting rod and is used to lift the rotating base 2 and the manual lifting rod 3. The top of the support frame 1 can be positioned up or down. The support frame 1 is driven by a motor and its bottom end is a foldable structure with multiple legs that can be folded or unfolded. The folding is for easy carrying. The unfolded support frame can be automatically raised and lowered by controlling the motor. The support frame adopts a foldable design, and after unfolding, it is driven by a motor to achieve height adjustment (range 0.5-1.8m). It is preferred that the support frame has a wind resistance level ≥ level 8 and can carry a 10kg lightning arrester without tipping over.

[0039] Among them, the rotating base 2 is sleeved on the outside of the top of the support frame 1, and the top of the support frame 1 drives the rotating base to rise and fall. The rotating base 2 is connected to the rotating base 2 by a rotating motor 22, and the rotating motor 22 controls the rotation of the rotating base 2. The rotating base 2 is provided with a plurality of mounting bars 24 arranged along the circumferential array of the support frame 1, and the length direction of the mounting bars 24 is arranged along the radial direction of the support frame 1. The mounting bar 24 is provided with three slot holes 241 for fixing the arrester flange of the lightning arrester. The flange can be snapped into the slot hole, and the slot hole 241 is opened on the top surface of the mounting bar 24. The insulating slot hole (with a silicone anti-slip layer) provided on the rotating base can fix the arrester flange to ensure that the vertical angle deviation is ≤2°, further increasing the safety of the device. The slot hole 241 is a through hole, and the grounding spring contact is located below it.

[0040] Preferably, the rotating base 2 includes a rotatable rotating ring, a plurality of mounting bars 24, and a circular outer frame 25. The rotating ring is sleeved on the outside of the top end of the support frame 1 and is rotatably connected to the top end of the support frame 1; the outer frame 25 surrounds the rotating ring, and the plurality of mounting bars 24 are fixedly connected between the rotating ring and the outer frame 25. The plurality of mounting bars 24 are arranged in an array along the circumference of the rotating ring, and the length of the mounting bars 24 is arranged along the radial direction of the support frame 1.

[0041] Preferably, the support frame further comprises a slot hole gasket detachably connected to the slot hole 241, and the slot hole gasket is used to change the aperture of the slot hole 241. In this way, the support frame can be adapted to different sizes of lightning arresters (flange aperture Φ20-50mm) by replacing the slot hole gasket.

[0042] Among them, one rotation technology route of the rotating base 2 can be selected as follows: the rotating motor 22 is preferably a stepping motor built into the rotating base (not shown in the figure), which supports 0-360° horizontal rotation and adapts to different test angle requirements.

[0043] Alternatively, another rotational technology for the rotating base 2 is as follows: the rotating base 2 includes a rotatable rotating ring, a plurality of mounting bars 24, and a circular outer frame 25. The rotating ring is sleeved onto the top of the support frame 1 and is rotationally connected to the top of the support frame 1; a rotating motor 22 is connected to the rotating ring, and the outer frame 25 surrounds the rotating ring. The plurality of mounting bars 24 are fixedly connected between the rotating ring and the outer frame 25, and the plurality of mounting bars 24 are arranged in an array along the circumference of the rotating ring.

[0044] A housing (not shown) is fixed to the outer surface of the top of the support frame 1. The motor is mounted within the housing. A driven gear 21 is fixed to the bottom end of the rotating ring, which is rotatably sleeved onto the exterior of the top of the support frame 1. The output shaft of the motor is connected to a driving gear that meshes with the driven gear 21. The motor drives the driving gear to rotate, thereby driving the driven gear to rotate around the top of the support frame 1, thereby driving the rotating ring to rotate.

[0045] The bottom end of the manual lift rod 3 is fixedly connected to the top end of the support frame 1. The manual lift rod 3 adjusts the position of the high-voltage electrode 4, facilitating the installation of the lightning arrester. The high-voltage electrode is located at the top end of the manual lift rod 3 and has only the freedom to move up and down. The manual lift rod 3 is preferably a telescopic rod and is insulated.

[0046] It also includes a motor drive module, a wireless remote control module, a high-voltage electrode 4, a grounding terminal integrated board module and a safety protection module.

[0047] The motor drive module is connected to the support frame 1 and the rotating base 2 respectively to achieve height adjustment and horizontal rotation. It is used to adjust the lifting height of the support frame 1 and the rotation angle of the rotating base 2.

[0048] The wireless remote control module is used to remotely control the motor drive module. Controlling the motor via the wireless remote control module allows for height adjustment (accuracy of ±1cm) and base rotation (accuracy of ±1°). The auxiliary device's built-in position sensor provides real-time feedback on adjustment parameters to ensure compliance with test procedures.

[0049] The high-voltage electrode 4 has three high-voltage electrode arrays, which are arranged corresponding to the three slots 241 for synchronously applying the test voltage. The high-voltage electrode 4 is provided with a high-voltage lead. The high-voltage electrode is preferably made of copper or other conductive materials.

[0050] The grounding terminal integrated board module is used to realize the parallel connection of multiple lightning arresters.

[0051] The high-voltage lead inputs high current into the spring contact of the high-voltage electrode, which is then input into the top of the lightning arrester. The lightning arrester transmits electricity to the spring contact of the grounding electrode, and the grounding contact is connected to the grounding copper bus or the grounding terminal integrated board for grounding.

[0052] Preferably, the grounding terminal integrated board module includes a plurality of grounding electrodes arranged on the mounting bar 24 and a grounding terminal integrated board and a grounding copper busbar arranged on the bottom surface of the rotating base 2, and each slot hole corresponds to a grounding electrode. The grounding electrode automatically contacts the grounding terminal of the lightning arrester through a spring contact, and all grounding electrodes are connected to the grounding terminal integrated board. The rotating base 2 has a built-in grounding electrode, and the grounding electrode automatically contacts the grounding terminal of the lightning arrester through a spring contact, and the grounding resistance is ≤0.1Ω. The spring contact of the high-voltage electrode is connected to the top of the lightning arrester, the bottom of the lightning arrester is placed in the slot, and the spring contact of the grounding electrode is connected to the bottom of the lightning arrester.

[0053] The grounding resistance of the grounding electrode is ≤0.1Ω. The grounding terminal integrated board uses a parallel copper busbar structure to reduce grounding resistance. The ground loop resistance is reduced to 1 / 10 of that of traditional methods, and the leakage current measurement error is ≤0.5%.

[0054] Preferably, there are eight mounting bars 24. This allows for simultaneous testing of multiple arresters. Eight groups of slots are located on the top of the support frame, each group capable of holding three arresters (a total of 24). The slots correspond one-to-one with the high-voltage electrode arrays. The high-voltage electrodes are copper busbars, ensuring automatic conduction after the arresters are installed.

[0055] The safety protection module includes a tilt sensor arranged at the bottom of the support frame 1, which automatically cuts off the high voltage and alarms when the tilt angle of the lightning arrester is greater than 5°.

[0056] The high-voltage electrode array of the high-voltage electrode adopts a spring contact structure, and the contact pressure can be adjusted in the range of 5-10N.

[0057] The distance between the high-voltage lead wire on the high-voltage electrode 4 and the ground is stable at ≥0.8m. This enhances safety and ensures that the distance between the high-voltage lead wire and the ground is stable at ≥0.8m, which complies with the requirements of DL / T 474.5-2018 standard.

[0058] During the specific implementation, the hardware configuration requirements are as follows: (1) Folding support frame: Made of aviation aluminum alloy, with a deadweight of ≤15kg and a load-bearing capacity of ≥200kg; (2) Rotating motor and lifting support frame motor: Use IP67 protection grade DC servo motor, equipped with a reduction gearbox; and integrate position feedback sensor (3) Wireless remote control module: Based on LoRa communication protocol, with an effective control distance of ≥50m. The mounting strip contains 8 sets of independent card slots, and each mounting strip can accommodate 3 lightning arresters. The high-voltage electrode array adopts a spring contact structure, and the contact pressure can be adjusted in the range of 5-10N. The device has passed the GB / T 2423.55-2021 mechanical shock test certification and is suitable for complex environments such as substations and mountain lines.

[0059] Operation process: Step 1: Expand the support frame and fix the lightning arrester, and ensure reliable contact through the slot locking mechanism; Step 2: Remotely input the target height (such as 1.2m) and rotation angle (such as 30°), and the device automatically adjusts to the correct position; Step 3: Start the high-voltage test, and the data acquisition system records the lightning arrester leakage current and operating voltage in real time.

[0060] Compared with traditional methods, the single test time of this device is shortened from 4 hours to 0.5 hours, and the efficiency is improved by 87%; the number of times the test personnel operate and touch the high-voltage electrode is reduced from 24 times to 1 time, and safety hazards are completely eliminated.

[0061] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A portable auxiliary device for batch testing of 10kV lightning arresters, characterized in that: The device comprises, from bottom to top, a foldable support frame (1), a rotatable rotating base (2) and a manual lifting rod (3); The support frame (1) is an electric lifting rod and is used to lift the rotating base (2) and the manual lifting rod (3); The rotating base (2) is sleeved on the outside of the top end of the support frame (1) and is connected to the rotating base (2) by a rotating motor (22). The rotating base (2) is provided with a plurality of mounting bars (24) arranged along the circumferential direction of the support frame (1). The length direction of the mounting bars (24) is arranged along the radial direction of the support frame (1); The mounting bar (24) is provided with three slot holes (241) for fixing the arrester flange of the arrester; The bottom end of the manual lifting rod (3) is fixedly connected to the top end of the support frame (1); It also includes a motor drive module, a wireless remote control module, a high voltage electrode (4), a ground terminal integrated board module and a safety protection module; The motor drive module is used to adjust the lifting height of the support frame (1) and the rotation angle of the rotating base (2); The wireless remote control module is used to remotely control the motor drive module; The high-voltage electrode array of the high-voltage electrode (4) is arranged corresponding to the three slot holes (241) for synchronously applying a test voltage; The grounding terminal integrated board module is used to realize parallel connection of multiple lightning arresters.

2. A portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: The grounding terminal integrated board module comprises a plurality of grounding electrodes arranged on a mounting bar (24) and a grounding terminal integrated board arranged on a rotating base (2); the grounding electrodes automatically contact the grounding terminal of the lightning arrester through spring contacts; and all the grounding electrodes are connected to the grounding terminal integrated board.

3. A portable auxiliary device for batch testing of 10kV lightning arresters according to claim 2, characterized in that: The grounding resistance of the grounding electrode is ≤0.1Ω.

4. A portable auxiliary device for batch testing of 10kV lightning arresters according to claim 2, characterized in that: The grounding terminal integrated board adopts a copper bus parallel structure.

5. The portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: The number of the mounting bars (24) is eight.

6. A portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: The safety protection module comprises an inclination sensor arranged at the bottom of the support frame (1), which automatically cuts off the high voltage and alarms when the inclination angle of the lightning arrester is greater than 5°.

7. The portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: The high-voltage electrode array of the high-voltage electrode (4) adopts a spring contact structure, and the adjustable range of the contact pressure is 5-10N.

8. The portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: It also includes a slot hole gasket detachably connected to the slot hole (241), and the slot hole gasket is used to change the aperture of the slot hole (241).

9. The portable auxiliary device for batch testing of 10kV lightning arresters according to claim 1, characterized in that: The distance between the high-voltage lead wire on the high-voltage electrode (4) and the ground is stable at ≥0.8 m.

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