A portable adjustable DC voltage withstanding discharging device

Abstract

The utility model relates to high -voltage electrical test equipment technical field provides a portable adjustable direct current withstand voltage discharge device, include: moving trolley mechanism, pillar, horizontal rotation mechanism, swing mechanism and discharge mechanism, the horizontal rotation mechanism sets up on moving trolley mechanism, the pillar is located on the horizontal rotation mechanism, swing mechanism's both ends are connected with the pillar and discharge mechanism respectively, wherein, swing mechanism is used for adjusting the height of discharge mechanism, the horizontal rotation mechanism is used for adjusting the rotation angle of the pillar on the horizontal plane, discharge mechanism is used for discharging to test equipment. Solve the safety hidden danger that the artificial discharge exists in the high voltage equipment in the existing direct current withstand voltage test, and the problem that the existing discharge device is inconvenient to carry and is not adapted to the non-flat ground site.

Description

Technical Field

[0001] This utility model relates to the field of high voltage electrical testing equipment technology, and more specifically, to a portable adjustable DC withstand voltage discharge device. Background Technology

[0002] DC withstand voltage testing effectively detects insulation moisture and overall defects such as dirt in electrical equipment. The DC withstand voltage test is a step-by-step voltage increase process, during which leakage current can be monitored in real time to identify insulation defects in the tested equipment. After the DC withstand voltage test, the test object must be fully discharged before contact with it. Before discharging, the high-voltage power supply is first disconnected, the test object is discharged to ground through a resistor, and finally directly grounded. For large-capacity test objects, such as long cables, capacitors, and large motors, a longer discharge time is required to ensure all charged charges are released. For DC high-voltage generating devices, each capacitor stage must be discharged sequentially before wiring changes or the test can be terminated and the wiring disconnected. For power cables, capacitors, generators, transformers, etc., the test object must first be discharged through an appropriate discharge resistor. Direct discharge to ground may generate extremely high-frequency oscillating overvoltages, which can damage the insulation of the test object. The discharge resistor depends on the test voltage and the capacitance of the test object; it must have sufficient resistance and thermal capacity.

[0003] Traditional DC withstand voltage discharge methods involve manual discharge, whereby a tester wearing insulated gloves and shoes uses a discharge rod with a fixed resistor to discharge the DC high-voltage generator. This method is relatively reliable and fast for discharging DC withstand voltage test equipment with relatively low applied voltages. However, discharging DC withstand voltage test equipment with relatively high applied voltages usually presents many safety risks. Discharging higher voltage DC withstand voltage equipment typically takes longer and requires maintaining a greater safety distance. While discharge devices for DC withstand voltage testing exist, existing devices are large, inconvenient to transport, and unsuitable for test sites other than flat ground. Utility Model Content

[0004] The purpose of this utility model is to provide a portable adjustable DC withstand voltage discharge device, which aims to solve the safety hazards of artificial discharge to high-voltage equipment in existing DC withstand voltage tests, as well as the problems that existing discharge devices are large and inconvenient to transport and are not suitable for non-flat sites.

[0005] This utility model is achieved through the following technical solution: A portable adjustable DC withstand voltage discharge device includes: a mobile trolley mechanism, a support column, a horizontal rotation mechanism, a swing mechanism, and a discharge mechanism. The horizontal rotation mechanism is mounted on the mobile trolley mechanism, the support column is mounted on the horizontal rotation mechanism, and the two ends of the swing mechanism are respectively connected to the support column and the discharge mechanism. A handle is provided on the support column. The swing mechanism is used to adjust the height of the discharge mechanism; the horizontal rotation mechanism is used to adjust the rotation angle of the support column on the horizontal plane; and the discharge mechanism is used to discharge the test equipment.

[0006] Optionally, the mobile trolley mechanism includes a trolley body and wheels, the wheels are mounted on the bottom of the trolley body, and the horizontal rotation mechanism is disposed on the trolley body.

[0007] Optionally, the wheel is provided with a wheel locking assembly; wherein the wheel locking assembly is used to lock the wheel.

[0008] Optionally, the horizontal rotation mechanism is provided with a first fastening component; wherein the first fastening component is used to lock the rotation angle of the horizontal rotation mechanism.

[0009] Optionally, the swing mechanism includes a fixing mechanism, a first telescopic rod, an adjusting rod, and a second telescopic rod. The fixing mechanism is mounted on the support column. The first telescopic rod is connected to the fixing mechanism. The adjusting rod is mounted on the telescopic part of the first telescopic rod. The tail of the second telescopic rod is hinged to the telescopic part of the first telescopic rod and one end of the adjusting rod, respectively.

[0010] Optionally, the fixing mechanism includes a positioning component, a limiting component, and a first clamp. The first clamp is disposed on the support column. The positioning component is connected to the first clamp and the first telescopic rod, respectively. The first telescopic rod is connected to the support column. The limiting component is disposed at the connection points between the positioning component and the first clamp and the first telescopic rod, and at the connection points between the first telescopic rod and the support column.

[0011] Optionally, a second fastening assembly is provided on the first telescopic rod; wherein the second fastening assembly is used to fix the telescopic length of the first telescopic rod.

[0012] Optionally, a second clamp is provided at the connection points of the tail portion of the second telescopic rod with the telescopic portion of the first telescopic rod and the adjusting rod, and at the connection point of the adjusting rod with the telescopic portion of the first telescopic rod. A third fastening component is provided on the second clamp.

[0013] Optionally, the discharge mechanism includes a discharge component and a grounding wire. The discharge component is connected to the swing mechanism. The discharge component is provided with a socket, and the grounding wire is connected to the socket.

[0014] Optionally, the mobile trolley mechanism is provided with terminal blocks, which are connected to the grounding stake and the grounding wire on the ground, respectively.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: The discharge operation is completed through a mechanical discharge mechanism, which reduces the direct contact between the test personnel and the high-voltage equipment and effectively avoids the safety risks caused by improper human operation or insufficient safety distance during high-voltage discharge. It is especially suitable for discharge scenarios of high-voltage DC withstand voltage test equipment.

[0016] By setting up a mobile trolley mechanism, the problem of the existing discharge device being large and inconvenient to transport is solved, enabling the device to move flexibly. It is not only suitable for flat test sites, but also adaptable to a variety of complex test sites other than flat sites, significantly expanding the application scenarios of the device.

[0017] The horizontal rotation mechanism can adjust the rotation angle of the support column on the horizontal plane, and the swing mechanism can adjust the height of the discharge mechanism. The two work together to allow the discharge mechanism to be adjusted in multiple dimensions according to the position, height and safety distance requirements of the test equipment, ensuring accurate discharge position, meeting the discharge requirements of test equipment of different specifications, and improving the flexibility and applicability of operation.

[0018] It can complete the discharge process in a more standardized manner, which helps to ensure the stability and reliability of the discharge process. At the same time, it can adapt to the long discharge time requirements of high voltage equipment and improve the overall efficiency of the discharge link of DC withstand voltage test. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the portable adjustable DC withstand voltage discharge device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the portable adjustable DC withstand voltage discharge device in operation according to an embodiment of the present invention; Icons: 1-Support, 2-Handle, 3-Limiting component, 4-First clamp, 5-Horizontal rotation mechanism, 6-First fastening component, 7-Terminal, 8-Cart body, 9-Lock wheel assembly, 10-Wheel, 11-Second fastening component, 12-First telescopic rod, 13-Third fastening component, 14-Second clamp, 15-Adjusting rod, 16-Second telescopic rod, 17-Discharge component, 18-Socket, 19-Grounding wire, 20-Grounding stake, 21-Test equipment. Detailed Implementation

[0020] The following is a detailed description of the embodiments, in conjunction with the accompanying drawings.

[0021] Reference Figure 1 , Figure 2 A portable adjustable DC withstand voltage discharge device includes: a mobile trolley mechanism, a support column 1, a horizontal rotation mechanism 5, a swing mechanism, and a discharge mechanism. The horizontal rotation mechanism 5 is mounted on the mobile trolley mechanism, the support column 1 is mounted on the horizontal rotation mechanism 5, and the two ends of the swing mechanism are connected to the support column 1 and the discharge mechanism, respectively. A handle 2 is provided on the support column 1. The swing mechanism is used to adjust the height of the discharge mechanism; the horizontal rotation mechanism 5 is used to adjust the rotation angle of the support column 1 on the horizontal plane; and the discharge mechanism is used to discharge onto the test equipment 21. The handle 2 can be used to manually operate the rotation angle of the metal support column.

[0022] The horizontal rotation mechanism can consist of a turntable and a thrust bearing. The turntable is mounted at the center of the top of the frame via the thrust bearing; the outer ring of the bearing is fixedly connected to the frame, and the inner ring is welded to the bottom of the turntable. Positioning holes are evenly distributed along the edge of the turntable. The rotation angle adjustment range is 0° to 360°, and rotating the turntable drives the support column 1 to rotate horizontally.

[0023] The support column 1 can be made of aluminum alloy round tube and can be a telescopic structure, with its height fixed by an internal spring pin. The swing mechanism can include a hinge base, an electric push rod, and a connecting frame. The hinge base is fixed to the support column 1, the base of the electric push rod is hinged to the hinge base, and the end of the push rod is hinged to the discharge mechanism through the connecting frame. The electric push rod can be DC driven and its extension and retraction can be controlled by a wireless remote control to achieve height adjustment of the discharge mechanism.

[0024] The discharge mechanism consists of an insulating rod, an adjustable resistor assembly, and a discharge head. The insulating rod is made of fiberglass with a non-slip textured surface. The adjustable resistor assembly contains multiple sets of metal film resistors with different resistance values, which are adjusted by rotating a switch to accommodate discharge requirements at different voltage levels (10kV-220kV). The discharge head is made of copper alloy, has a conical structure, a removable insulating protective sleeve at the tip, and is connected to a grounding terminal via a wire at the bottom.

[0025] In some embodiments, the mobile trolley mechanism includes a trolley body 8 and wheels 10. The wheels 10 are mounted on the bottom of the trolley body 8, and a horizontal rotation mechanism 5 is mounted on the trolley body 8. The trolley body 8 can be welded from high-strength aluminum alloy profiles, forming a rectangular frame structure. An aluminum alloy load-bearing plate is bolted to the top of the frame. The load-bearing plate has a pre-drilled mounting hole in the center that matches the horizontal rotation mechanism 5, and evenly distributed weight-reducing holes along the edges to reduce the overall weight. Reinforcing ribs are welded to the inner side of the frame of the trolley body 8. The reinforcing ribs are distributed at a 45° angle to the frame to further improve structural stability and ensure that there is no significant deformation after bearing the discharge mechanism and related components.

[0026] Wheel 10 can be a swivel caster, which is fixed to the bottom of the trolley body 8 with bolts. The tires of the swivel caster can be made of high-elasticity wear-resistant rubber material, with anti-slip treads on the tire surface and a built-in ring spring shock absorption structure inside the tire body.

[0027] In some embodiments, the wheel 10 is provided with a wheel locking assembly 9; wherein, the wheel locking assembly 9 is used to lock the wheel 10. The wheel locking assembly 9 includes a brake pad, a connecting rod, and a pedal. The pedal is mounted on the side of the trolley body 8 via a pin. When the pedal is pressed, the connecting rod drives the brake pad to tightly engage with the rim of the universal wheel, achieving immediate locking of the wheel; when the pedal is released, the brake pad resets and releases the lock. The wheel locking assembly 9, by driving the brake pad to tightly engage with the rim of the universal wheel through the pedal, can quickly achieve immediate locking of the trolley, effectively preventing device displacement due to ground vibration, external force contact, or other factors during the discharge process, ensuring the stability and safety of the discharge operation.

[0028] In some embodiments, the horizontal rotation mechanism 5 is provided with a first fastening component 6; wherein, the first fastening component 6 is used to lock the rotation angle of the horizontal rotation mechanism 5. The first fastening component 6 includes a positioning pin, a return spring, an operating handle, and a mounting base. The mounting base is fixed to the top of the frame of the moving trolley mechanism by bolts and is located on the outer side of the turntable edge of the horizontal rotation mechanism 5; the positioning pin passes through the mounting base in the horizontal direction, with one end corresponding to the positioning hole on the edge of the turntable, and the other end welded and fixed to the operating handle; the return spring is sleeved on the outside of the positioning pin, with both ends of the spring abutting against the inner wall of the mounting base and the limiting ring in the middle of the positioning pin, respectively. Under normal conditions, the return spring is in a naturally extended state, pushing the end of the positioning pin into the positioning hole of the turntable. During operation, the tester pulls the operating handle to overcome the elastic force of the return spring, causing the positioning pin to exit from the current positioning hole. At this time, the turntable can be freely rotated on the horizontal plane by rotating the support column 1; when adjusted to the target angle, the operating handle is released, and the return spring pushes the positioning pin to automatically insert into the corresponding positioning hole, realizing the instant locking of the horizontal rotation angle. The positioning holes are evenly distributed along the edge of the turntable. With the precise insertion of the positioning pins, multi-level angle fixation within the range of 0° to 360° can be achieved.

[0029] In some embodiments, the swing mechanism includes a fixing mechanism, a first telescopic rod 12, an adjusting rod 15, and a second telescopic rod 16. The fixing mechanism is mounted on the support column 1. The first telescopic rod 12 is connected to the fixing mechanism. The adjusting rod 15 is mounted on the telescopic part of the first telescopic rod 12. The tail of the second telescopic rod 16 is hinged to the telescopic part of the first telescopic rod 12 and one end of the adjusting rod 15, respectively. The telescopic function of the first telescopic rod 12 enables adjustment of the foundation height. Combined with the hinged linkage structure of the adjusting rod 15 and the second telescopic rod 16, multi-angle tilt adjustment of the discharge mechanism can be achieved in the vertical plane (not limited to a single height, but also the tilt angle can be adjusted). This allows the discharge mechanism to not only accurately adapt to the height differences of different test equipment (such as long cable terminals, capacitor terminals, transformer bushings, etc.), but also flexibly adjust the relative angle between the discharge head and the discharge point of the test equipment, ensuring reliable contact between the discharge head and the test equipment. This solves the problem that traditional fixed-height discharge devices are difficult to adapt to complex equipment structures.

[0030] In some embodiments, the fixing mechanism includes a positioning component, a limiting component 3, and a first clamp 4. The first clamp 4 is mounted on the support column 1. The positioning component is connected to both the first clamp 4 and the first telescopic rod 12, and the first telescopic rod 12 is connected to the support column 1. The limiting component 3 is located at the connection points between the positioning component and the first clamp 4 and the first telescopic rod 12, as well as at the connection point between the first telescopic rod 12 and the support column 1. The first clamp 4 is directly mounted on the support column 1 (aluminum alloy round tube). The clamp's encircling structure forms a uniform and tight constraint force on the tubular support column, effectively preventing relative slippage between the fixing mechanism and the support column 1 due to slight vibrations during the discharge process, external force contact, or the weight of the equipment. This provides a stable support foundation for the subsequent swing mechanism and discharge mechanism. Simultaneously, the positioning component precisely connects the first clamp 4 and the first telescopic rod 12. Combined with the reinforcement effect of the limiting component 3 at each connection point, this further eliminates connection gaps, avoids loosening problems caused by long-term use or stress, and ensures that the discharge mechanism remains stable during height adjustment and discharge operation, reducing discharge deviations or safety risks caused by structural swaying.

[0031] In some embodiments, a second fastening assembly 11 is provided on the first telescopic rod 12; wherein, the second fastening assembly 11 is used to fix the telescopic length of the first telescopic rod 12. The first telescopic rod 12 may adopt a nested inner and outer tube structure, including an outer tube and an inner tube, the bottom end of the outer tube is fixedly connected to the fixing mechanism (connected to the first clamp 4 through a positioning assembly), and the inner tube is sleeved inside the outer tube and can freely extend and retract along the axial direction to achieve preliminary adjustment of the height of the discharge mechanism. The second fastening component 11 is a knob-type quick-fastening structure, specifically including a butterfly-shaped fastening knob, an anti-slip rubber pad, and an outer tube threaded seat. A metal seat with internal threads is welded to the side wall of the outer tube near the top (the axis of the threaded seat is perpendicular to the axis of the outer tube). The screw part of the butterfly-shaped fastening knob is threaded into the threaded seat. The knob head is designed in a butterfly shape, which makes it easy for the tester to rotate it by hand. The anti-slip rubber pad is attached to the end of the screw of the fastening knob (towards the inner tube). The surface of the pad has fine anti-slip texture, which can increase the friction with the outer wall of the inner tube. The outer wall of the inner tube can be anodized to form a wear-resistant and anti-slip surface layer, further improving the coefficient of friction with the rubber pad. During adjustment, the tester loosens the butterfly-shaped fastening knob to disengage the rubber gasket from the outer wall of the inner tube, allowing the inner tube to freely extend and retract along the axial direction of the outer tube until the height of the discharge mechanism matches the discharge point of the test equipment 21. After the height is determined, the butterfly-shaped fastening knob is tightened in the opposite direction to ensure that the rubber gasket is in close contact with the outer wall of the inner tube. The relative position of the inner tube and the outer tube is locked by friction, thus reliably fixing the extension length of the first telescopic rod 12.

[0032] In some embodiments, a second clamp 14 is provided at the connection points of the tail portion of the second telescopic rod 16 with the telescopic portion of the first telescopic rod 12 and the adjusting rod 15, and at the connection point of the adjusting rod 15 with the telescopic portion of the first telescopic rod 12. A third fastening component 13 is provided on the second clamp 14. The second clamp 14 is a detachable ring-shaped structure. With the "loosen-adjust-lock" operation logic of the third fastening component 13, the hinge angle between the second telescopic rod 16 and the adjusting rod 15, and between the adjusting rod 15 and the first telescopic rod 12, can be flexibly adjusted. This allows the discharge mechanism to achieve multi-angle tilt adjustment in the vertical plane (rather than a single height adjustment), adapting to the differences in discharge point height and tilt angle of different test equipment (such as long cable terminals, capacitor terminals, transformer bushings, etc.). This solves the problem that traditional fixed-angle discharge devices are difficult to adapt to complex equipment structures, significantly improving the versatility of the device.

[0033] In some embodiments, the discharge mechanism includes a discharge component 17 and a grounding wire 19. The discharge component 17 is connected to a swing mechanism, and a socket 18 is provided on the discharge component 17. The grounding wire 19 is connected to the socket 18. The connection between the socket 18 and the grounding wire 19 ensures a mechanically secure contact between the grounding wire and the discharge component, avoiding the risk of grounding path interruption due to loosening or poor contact in traditional winding or temporary fixing methods. This stable connection ensures that the charging charge on the test sample is continuously and effectively conducted to the ground through the grounding wire, preventing residual charge from causing electric shock or equipment insulation damage, fundamentally guaranteeing the safety of the discharge process. The plug-and-play connection design of the socket 18 and the grounding wire 19 allows for quick installation and removal of the grounding wire without tools. In DC withstand voltage tests, the grounding wire needs to be quickly connected to establish a grounding path before discharge, and the grounding wire needs to be removed after the test to transfer the device. This structure reduces operational steps and time costs. Especially in non-flat test scenarios such as grassland and gravel ground, the convenient operation without tools can reduce the workload of test personnel, improve the overall test efficiency, and solve the problems of cumbersome and time-consuming operation of traditional bolt fixing or winding connection.

[0034] In some embodiments, the mobile trolley mechanism is equipped with terminals 7, which are connected to the grounding stake 20 and the grounding wire 19 on the ground, respectively. Terminals 7, as specially designed metal conductive connection nodes, employ a stable mechanical connection structure (such as bolt fixing or a dedicated plug-in interface) to achieve a low-impedance, non-loose connection between the grounding wire 19 and the grounding stake 20. Compared to traditional temporary winding, hooking, and other non-standard grounding methods, this effectively avoids the risk of grounding path interruption due to poor contact, oxidation, or external pulling, ensuring that charge is continuously and stably conducted to the ground through the grounding wire, terminals, and grounding stake during discharge. This fundamentally prevents residual charge from causing electric shock accidents or equipment insulation damage, meeting the safety requirements of "fully discharged" in DC withstand voltage tests.

Claims

1. A portable adjustable DC withstand voltage discharge device, characterized in that, include: The mobile trolley mechanism, the support column (1), the horizontal rotation mechanism (5), the swing mechanism and the discharge mechanism are provided. The horizontal rotation mechanism (5) is provided on the mobile trolley mechanism. The support column (1) is provided on the horizontal rotation mechanism (5). The two ends of the swing mechanism are respectively connected to the support column (1) and the discharge mechanism. The support column (1) is provided with a handle (2). The swing mechanism is used to adjust the height of the discharge mechanism; the horizontal rotation mechanism (5) is used to adjust the rotation angle of the support column (1) on the horizontal plane; and the discharge mechanism is used to discharge the test equipment (21).

2. The portable adjustable DC withstand voltage discharge device as described in claim 1, characterized in that, The mobile trolley mechanism includes a trolley body (8) and wheels (10). The wheels (10) are installed at the bottom of the trolley body (8), and the horizontal rotation mechanism (5) is disposed on the trolley body (8).

3. The portable adjustable DC withstand voltage discharge device as described in claim 2, characterized in that, The wheel (10) is provided with a wheel locking assembly (9); wherein the wheel locking assembly (9) is used to lock the wheel (10).

4. The portable adjustable DC withstand voltage discharge device as described in claim 1, characterized in that, The horizontal rotation mechanism (5) is provided with a first fastening component (6); wherein the first fastening component (6) is used to lock the rotation angle of the horizontal rotation mechanism (5).

5. The portable adjustable DC withstand voltage discharge device as described in claim 1, characterized in that, The swing mechanism includes a fixing mechanism, a first telescopic rod (12), an adjusting rod (15), and a second telescopic rod (16). The fixing mechanism is mounted on the support column (1). The first telescopic rod (12) is connected to the fixing mechanism. The adjusting rod (15) is mounted on the telescopic part of the first telescopic rod (12). The tail of the second telescopic rod (16) is hinged to the telescopic part of the first telescopic rod (12) and one end of the adjusting rod (15), respectively.

6. The portable adjustable DC withstand voltage discharge device as described in claim 5, characterized in that, The fixing mechanism includes a positioning component, a limiting component (3) and a first clamp (4). The first clamp (4) is disposed on the support column (1). The positioning component is connected to the first clamp (4) and the first telescopic rod (12) respectively. The first telescopic rod (12) is connected to the support column (1). The limiting component (3) is disposed at the connection points between the positioning component and the first clamp (4) and the first telescopic rod (12), and at the connection points between the first telescopic rod (12) and the support column (1).

7. The portable adjustable DC withstand voltage discharge device as described in claim 5, characterized in that, The first telescopic rod (12) is provided with a second fastening component (11); wherein the second fastening component (11) is used to fix the telescopic length of the first telescopic rod (12).

8. The portable adjustable DC withstand voltage discharge device as described in claim 5, characterized in that, The tail of the second telescopic rod (16) is connected to the telescopic part of the first telescopic rod (12) and the adjusting rod (15), and the adjusting rod (15) is connected to the telescopic part of the first telescopic rod (12). A second clamp (14) is provided on the second clamp (14). A third fastening component (13) is provided on the second clamp (14).

9. The portable adjustable DC withstand voltage discharge device as described in claim 1, characterized in that, The discharge mechanism includes a discharge component (17) and a grounding wire (19). The discharge component (17) is connected to the swing mechanism. The discharge component (17) is provided with a socket (18), and the grounding wire (19) is connected to the socket (18).

10. The portable adjustable DC withstand voltage discharge device as described in claim 9, characterized in that, The mobile trolley mechanism is equipped with a terminal block (7), which is connected to the grounding stake (20) and the grounding wire (19) on the ground.

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