A ground resistance test device for power distribution installation

Abstract

The present invention relates to the technical field of electric power equipment, and discloses a grounding resistance test device for power distribution installation, including a resistance tester, the resistance tester including a main shell and a flip cover rotatably connected to the main shell, at least one storage box is arranged on the side of the main shell, a winding mechanism is installed in the storage box, the winding mechanism is used to wind up the test cable of the resistance tester, and two outlet holes are arranged on the shell of the storage box for the connectors at both ends of the test cable to pass through. The grounding resistance test device for power installation proposed by the present invention is provided with a winding mechanism capable of winding up the cable, and an auxiliary winding unit is provided, which can make the test cable neatly stored in the storage box, avoiding the messy arrangement of the cables and affecting the work. In addition, the winding mechanism and the auxiliary winding unit can work automatically, saving the time of manual winding and releasing, saving manpower and material resources, and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a ground resistance testing device for power distribution installation. Background Art

[0002] The measurement of grounding resistance generally refers to a power connection device releasing current to the ground, and then using another power connection device to measure the resistance encountered by the current diffusion. The size of the grounding resistance reflects the degree of "grounding" of the electrical device. The grounding resistance is commonly used in various electrical equipment such as distribution cabinets. Usually, the grounding resistance is generally measured using a grounding resistance meter. The grounding resistance meter generally needs to have anti-interference ability, small size, light weight, etc.

[0003] During the test, the grounding terminal of the ground resistance tester needs to be grounded. The usual practice is to use a steel chisel as the grounding point and hammer the grounding rod into the ground with a hammer or other tool.

[0004] The existing ground resistance tester has multiple test wires, namely voltage wire and current wire. During the test, two grounding probes are inserted into the ground along the radial direction of the ground body. Due to the long length of the wires, it takes a lot of time to pull and retract the wires during the test, and they are easy to get tangled together. At the same time, due to outdoor work, the outer surface of the wires is easily contaminated, so it takes manpower to clean the wires. Therefore, it is urgent to design a ground resistance test device for power distribution installation to solve the above problems. Summary of the invention

[0005] In order to solve the technical problems raised in the background technology, the present invention provides a ground resistance testing device for power distribution installation.

[0006] The present invention is implemented by the following technical scheme: a ground resistance test device for power distribution installation, comprising a resistance tester, the resistance tester comprising a main shell and a flip cover rotatably connected to the main shell, at least one storage box is arranged on the side of the main shell, a winding mechanism is installed in the storage box, the winding mechanism is used to wind up the test cable of the resistance tester, and two outlet holes are arranged on the shell of the storage box for the connectors at both ends of the test cable to pass through;

[0007] The winding mechanism includes a central column installed in the storage box and an auxiliary winding unit connected to the central column. The central column is cylindrical, and an annular rear baffle and a front baffle unit are fixed to the outside of the central column. A threading port is provided on the rear baffle for one end of the test cable to pass through, and a winding space for winding the test cable is formed between the front baffle unit and the rear baffle.

[0008] During installation, one end of the test cable passing through the threading port extends out of one of the outlet holes for connection with the resistance tester body, and the other end of the test cable passes through another outlet hole for connection with the steel bar inserted into the soil from the outside.

[0009] As a further improvement of the above scheme, the auxiliary winding unit includes a rotating plate coaxially connected to the central column, a driving motor driving the rotating plate to rotate, and a through block slidably connected to the rotating plate, and a through hole is opened on the through block for the test cable to pass through.

[0010] As a further improvement of the above scheme, the rotating plate is rotatably connected to the side of the central column through a rotating axis, and the rotating plate and the rotating axis are perpendicular. A strip hole is opened on the rotating plate along its length direction, and a guide mechanism is arranged in the strip hole along the length direction. A slider is slidably connected to the guide mechanism, and a telescopic guide rod parallel to the axis of the central column is connected to the side of the slider. The other end of the telescopic guide rod is connected to the through block, and the distance between the slider and the through block is adjusted by an adjustment unit.

[0011] As a further improvement of the above solution, the adjustment unit includes an electromagnetic mechanism installed on the slider, which is energized and can be magnetically attracted or repelled by the penetration block to change the distance between the penetration hole and the slider.

[0012] As a further improvement of the above scheme, the front block unit includes at least three anti-slip plates, an annular groove is provided on the side of the central column, one end of the anti-slip plate extends into the annular groove and is rotatably connected to the inner wall of the annular groove, the anti-slip plate includes plate body one and plate body two, a movable mounting groove is provided in plate body one along its length direction, one end of plate body two is slidably inserted in the movable mounting groove, and a driving motor is also installed in the movable mounting groove, the output shaft of the driving motor is installed with a driving gear, a toothed plate meshing with the gear is provided on the side of plate body two along its length direction, and a number of adjustment motors for driving the anti-slip plate to rotate are also provided in the annular groove.

[0013] As a further improvement of the above scheme, a guide rail is arranged on the inner wall of the movable mounting groove along its length direction, a guide slide groove slidably connected to the guide rail is arranged on the side of the plate body 2, a plurality of infrared sensors are installed on the side of the plate body 2 close to the rear baffle, and a controller is also installed on the center column. The signal input end of the controller is electrically connected to each infrared sensor, and the signal output end of the controller is electrically connected to the adjustment motor.

[0014] As a further improvement of the above scheme, an auxiliary pulling mechanism is further provided at the outlet where the test cable passes through the auxiliary winding unit. The auxiliary pulling mechanism is arranged in a storage box, and includes two symmetrically arranged reels. The axles of the two reels are driven by a motor, and a channel for the test cable to pass through is formed between the two reels, and the outer surface of the test cable is in squeeze contact with the inner wall of the channel.

[0015] As a further improvement of the above solution, a cleaning mechanism is installed at the cable outlet of the adjacent auxiliary pulling mechanism, and the cleaning mechanism is used to clean the outer surface of the test cable.

[0016] As a further improvement of the above scheme, the cleaning mechanism includes two guide plates, one side of the guide plate is connected to the inner wall of the wire outlet through an elastic telescopic mechanism, and the elastic telescopic mechanism is installed in a groove set on the inner wall of the wire outlet, and the guide plate includes a horizontal section and a vertical section, the horizontal section is an arc-shaped plate, and a cleaning unit is detachably installed on the inner side of the horizontal section, the vertical section is arranged on the inner side of the storage box, and a toothed plate is longitudinally installed on the side of the vertical section, and a gear meshing with the above-mentioned toothed plate is installed on the wheel axle of the adjacent wire wheel.

[0017] As a further improvement of the above scheme, the cleaning unit includes a hard mounting plate and a soft lining, a through hole is opened on the horizontal section, and the side of the mounting plate away from the lining is rotatably connected to a rotating positioning rod through a pin shaft, a torsion spring is installed on the pin shaft, one end of the rotating positioning rod can pass through the through hole, and a protrusion is provided on the outer side of the horizontal section, a connecting hole is provided on the protrusion, and the end of the rotating positioning rod also begins to have an ear hole that can be connected to the connecting hole, screws are passed through the ear holes and the connecting holes, and nuts are spirally installed on both ends of the screw.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The ground resistance test device for electrical installation proposed by the present invention is provided with a winding mechanism capable of winding up the cable and an auxiliary winding unit, so that the test cable can be neatly stored in the storage box, avoiding the messy arrangement of the cables and affecting the work.

[0020] The winding mechanism and the auxiliary winding unit proposed in the present invention can work automatically, save manual wire winding and unwinding time, save manpower and material resources, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side view of the overall structure of the ground resistance test device for power distribution installation proposed by the present invention;

[0022] Figure 2 It is a structural schematic diagram of the winding mechanism of the ground resistance test device for power distribution installation proposed by the present invention when the wire is being taken up;

[0023] Figure 3 It is a structural schematic diagram of the winding mechanism of the ground resistance test device for power distribution installation proposed by the present invention when the wire is being released;

[0024] Figure 4 The invention provides a grounding resistance testing device for power distribution installation. Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 A side view of the winding mechanism of the ground resistance testing device for power distribution installation proposed by the present invention;

[0026] Figure 6 The invention provides a grounding resistance testing device for power distribution installation. Figure 4 The enlarged view of point B in the figure;

[0027] Figure 7 This is a structural schematic diagram of a wire blocking plate of a ground resistance testing device for power distribution installation proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the guide plate structure of the ground resistance testing device for power distribution installation proposed by the present invention.

[0029] Description of main symbols:

[0030] Main shell 1, flip cover 2, winding mechanism 3, center column 301, rear baffle 302, drive motor 303, rotating plate 304, electromagnetic mechanism 306, slider 307, telescopic guide rod 308, through block 309, limit sleeve 4, guide wheel 5, connector 6, wire outlet hole 7, test cable 8, strip hole 9, anti-slip plate 10, plate body 11, infrared sensor 13, plate body 2 14, drive motor 15, movable mounting groove 17, guide plate 20, wire wheel 21, horizontal section 22, columnar spring 23, groove 24, stop plate 25, rolling element 26, lining 27, mounting plate 28, screw 29, nut 30, rotating positioning rod 31, through hole 32, vertical section 33. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0032] Embodiment 1:

[0033] Reference Figure 1-8 In the present scheme, a grounding resistance test device for power distribution installation is proposed, including a resistance tester, the resistance tester including a main shell 1 and a flip cover 2 rotatably connected to the main shell 1, other power components are installed in the main and object bodies, and the terminal head is arranged on the top surface of the main shell 1, at least one storage box is arranged on the side of the main shell 1, a winding mechanism 3 is installed in the storage box, the winding mechanism 3 is used to wind up the test cable 8 of the resistance tester, and two outlet holes 7 are arranged on the shell of the storage box for the connectors 6 at both ends of the test cable 8 to pass through; the side wall of the storage box can be opened with an inspection port, and a door panel is arranged at the inspection port for easy maintenance.

[0034] Reference Figure 2 and Figure 3 In the present embodiment, the winding mechanism 3 comprises a central column 301 installed in the storage box 1, an auxiliary winding unit connected to the central column 301, the central column 301 is cylindrical, and an annular rear baffle 302 and a front baffle unit are fixed to the outer side of the central column 301, a threading port is provided on the rear baffle 302 for one end of the test cable 8 to pass through, and a winding space for winding the test cable 8 is formed between the front baffle unit and the rear baffle 302; the winding space can stabilize the test cable 8 in a space when winding, so that the test line can be wound or loosened in circles, avoiding winding of the test cable, and making it more convenient and reliable to use.

[0035] During installation, one end of the test cable 8 passing through the threading port extends out of one of the outlet holes 7 for connection with the resistance tester body, and the other end of the test cable 8 passes through another outlet hole 7 for connection with the steel bar inserted into the soil. The cable passing through the rear baffle 302 passes through the limit sleeve 4 and the guide wheel 5 fixed in the storage box and finally passes out from the outlet on the top of the main housing, so as to be conveniently connected with the connector on the instrument.

[0036] It is worth mentioning that you can refer to Figure 2 The auxiliary winding unit includes a rotating plate 304 coaxially connected to the central column 301, a driving motor 303 driving the rotating plate 304 to rotate, and a through block 309 slidably connected to the rotating plate 304. The through block 309 is provided with a through hole for the test cable 8 to pass through. An installation cavity is provided in the central column 301, and the driving motor 303 is installed in the above-mentioned installation cavity.

[0037] Reference Figure 2-3 In this solution, the rotating plate 304 is rotatably connected to the side of the central column 301 through a rotating shaft, and the rotating plate 304 is perpendicular to the rotating shaft. The rotating plate 304 is provided with a strip hole 9 along its length direction, and a guide mechanism 305 is provided in the strip hole along the length direction. A slider 307 is slidably connected to the guide mechanism 305. A telescopic guide rod 308 parallel to the axis of the central column 301 is connected to the side of the slider 307. The other end of the telescopic guide rod 308 is connected to the through block 309, and the distance between the slider 307 and the through block 309 is adjusted by the adjustment unit. When winding the wire, the distance between the slider 307 and the through block 309 is kept at 90° by the adjustment unit. Figure 2 In the state shown, when the line is loosened, the distance between the slider 307 and the wear block 309 is kept at Figure 3 The state shown in the figure can smoothly complete the two operations of winding and loosening the wire.

[0038] Optionally, the adjustment unit includes an electromagnetic mechanism 306 installed on the slider 307. The electromagnetic mechanism 306 is energized and can be magnetically attracted or repelled by the through-hole 309 to change the distance between the through-hole 309 and the slider 307. The electromagnetic mechanism 306 includes an electromagnet 1 (not shown) installed on the through-hole 309 and an electromagnet 2 (not shown) installed on the slider 307. The purpose of adjusting the distance between the two is achieved through the magnetic attraction between the electromagnet 1 and the electromagnet 2.

[0039] As an optional embodiment of the present invention, the front block unit includes at least three anti-slip plates 10, an annular groove is provided on the side of the central column 301, one end of the anti-slip plate 10 extends into the annular groove and is rotatably connected to the inner wall of the annular groove, the anti-slip plate 10 includes a plate body 11 and a plate body 2 14, a movable mounting groove 17 is provided in the plate body 11 along its length direction, one end of the plate body 2 14 is slidably inserted in the movable mounting groove 17, and a driving motor 15 is also installed in the movable mounting groove 17, the output shaft of the driving motor 15 is installed with a driving gear, a toothed plate meshing with the gear is provided on the side of the plate body 2 14 along its length direction, and a number of adjusting motors for driving the anti-slip plate 10 to rotate are also provided in the annular groove.

[0040] For better installation and use, a guide track 16 is arranged on the inner wall of the movable installation groove 17 along its length direction, a guide slide 12 is arranged on the side of the plate body 14 and is slidably connected to the guide track 16, a plurality of infrared sensors 13 are installed on the side of the plate body 14 close to the rear baffle 302, a controller is also installed on the central column 301, a signal input end of the controller is electrically connected to each infrared sensor 13, and a signal output end of the controller is electrically connected to the regulating motor. The above structure is particularly important when loosening the wire. When the infrared sensors at different positions detect that there is no cable beside them, the controller controls the regulating motor to drive the anti-slip plate 10 to rotate, so that the anti-slip plate 10 further rotates close to the central column 301, avoiding the anti-slip plate 10 from interfering with the loosening operation, making the work more stable and reliable.

[0041] An auxiliary pulling mechanism is also provided at the outlet 7 where the test cable passes through the auxiliary winding unit. The auxiliary pulling mechanism is provided in the storage box and includes two symmetrically arranged wire wheels 21. The axles of the two wire wheels 21 are driven by a motor, and a channel for the test cable 8 to pass through is formed between the two wire wheels 21. The outer surface of the test cable is in compression contact with the inner wall of the channel. The auxiliary pulling mechanism can pull the cable in the same direction synchronously when the auxiliary winding unit is working, so as to prevent the cable from being unable to move smoothly, and keep the test cable 8 in a tensioned state at all times, so as to prevent the cable from getting tangled.

[0042] A cleaning mechanism is installed at the outlet 7 of the adjacent auxiliary pulling mechanism, and the cleaning mechanism is used to clean the outer surface of the test cable 8. The cleaning mechanism can effectively clean the outer surface of the cable when in use, making it more convenient to use, saving the time of manually wiping the cable surface, and further improving work efficiency.

[0043] The cleaning mechanism includes two guide plates 20, one side of the guide plate 20 is connected to the inner wall of the outlet 7 by an elastic telescopic mechanism 18, and the elastic telescopic mechanism is installed in the groove 19 provided on the inner wall of the outlet 7, and the guide plate 20 includes a horizontal section 22 and a vertical section 33, the horizontal section 22 is an arc-shaped plate, and a cleaning unit is detachably installed on the inner side of the horizontal section 22, the vertical section 33 is provided on the inner side of the storage box, and a tooth plate is longitudinally installed on the side of the vertical section, and a gear meshing with the above-mentioned tooth plate is installed on the wheel axle of the adjacent wire wheel 21. The two guide plates 20 can be kept in a state of being closely fitted to the test cable through the telescopic mechanism, so that when the cable moves, real cleaning can be achieved. And the telescopic mechanism is composed of a return spring sleeved on the outer side of the telescopic rod.

[0044] As a further improvement of the above scheme, the cleaning unit includes a hard mounting plate 28 and a soft lining 27. A through hole 32 is provided on the horizontal section 22. The side of the mounting plate 28 away from the lining 27 is rotatably connected to a rotating positioning rod 31 through a pin shaft. A torsion spring is installed on the pin shaft. One end of the rotating positioning rod 31 can pass through the through hole 32. A protrusion is provided on the outer side of the horizontal section 22. A connecting hole is provided on the protrusion. The end of the rotating positioning rod 31 also begins to have an ear hole that can be connected to the connecting hole. A screw 29 is passed through the ear hole and the connecting hole. Nuts 30 are screwed on both ends of the screw 29. During installation, the mounting plate 28 can be moved to fit the inner side of the horizontal section 22. When the rotating positioning rod 31 moves to the point where it can extend out of the through hole 32, the rotating positioning rod automatically extends out of the through hole under the action of the screw and the nut, thereby facilitating the installation of the screw and the nut to fix the mounting plate 28 and the lining 27 inside it. The lining can be made of a water-absorbing sponge or other water-absorbing material. In addition, a plurality of drainage holes are provided on the surface of the horizontal section 22, so as to squeeze out the absorbed water.

[0045] A groove 24 is provided on the inner side of the horizontal section of the guide plate 20, a columnar spring 23 is installed in the groove 24, the other end of the columnar spring 23 is connected to a stop plate 25 which is slidably connected to the groove 24, a rolling member 26 is installed at the end of the stop plate 25, and the stop plate 25 is used to prevent the mounting plate 28 from continuing to move inward.

[0046] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A ground resistance test device for power distribution installation, comprising a resistance tester, wherein the resistance tester comprises a main housing and a flip cover rotatably connected to the main housing, characterized in that: At least one storage box is provided on the side of the main housing, and a winding mechanism is installed in the storage box, and the winding mechanism is used to wind up the test cable of the resistance tester, and two outlet holes are provided on the housing of the storage box for the connectors at both ends of the test cable to pass through; The winding mechanism includes a central column installed in the storage box and an auxiliary winding unit connected to the central column. The central column is cylindrical, and an annular rear baffle and a front baffle unit are fixed to the outside of the central column. A threading port is provided on the rear baffle for one end of the test cable to pass through, and a winding space for winding the test cable is formed between the front baffle unit and the rear baffle; During installation, one end of the test cable passing through the threading port extends out of one of the outlet holes for connection with the resistance tester body, and the other end of the test cable passes through another outlet hole for connection with a steel bar inserted into the soil from the outside; The auxiliary winding unit comprises a rotating plate coaxially connected to the central column, a driving motor driving the rotating plate to rotate, and a through-block slidably connected to the rotating plate, wherein the through-block is provided with a through-hole for the test cable to pass through; The rotating plate is rotatably connected to the side of the central column through a rotating shaft, and the rotating plate and the rotating shaft are perpendicular. A strip hole is opened on the rotating plate along its length direction, and a guide mechanism is arranged in the strip hole along the length direction. A slider is slidably connected to the guide mechanism, and a telescopic guide rod parallel to the axis of the central column is connected to the side of the slider. The other end of the telescopic guide rod is connected to the wear block, and the distance between the slider and the wear block is adjusted by an adjustment unit. The adjusting unit comprises an electromagnetic mechanism mounted on the slider, and the electromagnetic mechanism is energized and can be magnetically attracted or repelled by the punch block to change the distance between the punch hole and the slider; The front stop unit includes at least three anti-slip plates, an annular groove is provided on the side of the central column, one end of the anti-slip plate extends into the annular groove and is rotatably connected to the inner wall of the annular groove, the anti-slip plate includes plate body one and plate body two, a movable mounting groove is provided in plate body one along its length direction, one end of plate body two is slidably inserted in the movable mounting groove, and a driving motor is also installed in the movable mounting groove, and a driving gear is installed on the output shaft of the driving motor, a toothed plate meshing with the gear is provided on the side of plate body two along its length direction, and a plurality of adjusting motors for driving the anti-slip plate to rotate are also provided in the annular groove.

2. A ground resistance test device for power distribution installation according to claim 1, characterized in that: The inner wall of the movable mounting groove is provided with a guide track along its length direction, and the side of the plate body 2 is provided with a guide slide groove slidably connected to the guide track. A plurality of infrared sensors are installed on the side of the plate body 2 close to the rear baffle. A controller is also installed on the central column. The signal input end of the controller is electrically connected to each infrared sensor, and the signal output end of the controller is electrically connected to the adjusting motor.

3. A ground resistance test device for power distribution installation as claimed in claim 1, characterized in that: An auxiliary pulling mechanism is also provided at the outlet where the test cable passes through the auxiliary winding unit. The auxiliary pulling mechanism is arranged in a storage box, and includes two symmetrically arranged wire wheels. The axles of the two wire wheels are driven by a motor, and a channel for the test cable to pass through is formed between the two wire wheels. The outer surface of the test cable is in squeeze contact with the inner wall of the channel.

4. A ground resistance test device for power distribution installation as claimed in claim 3, characterized in that: A cleaning mechanism is installed at the cable outlet adjacent to the auxiliary pulling mechanism, and the cleaning mechanism is used to clean the outer surface of the test cable.

5. A ground resistance test device for power distribution installation as claimed in claim 4, characterized in that: The cleaning mechanism includes two guide plates, one side of the guide plate is connected to the inner wall of the wire outlet through an elastic telescopic mechanism, and the elastic telescopic mechanism is installed in a groove set on the inner wall of the wire outlet, and the guide plate includes a horizontal section and a vertical section, the horizontal section is an arc-shaped plate, and a cleaning unit is detachably installed on the inner side of the horizontal section, the vertical section is arranged on the inner side of the storage box, and a toothed plate is longitudinally installed on the side of the vertical section, and a gear meshing with the above-mentioned toothed plate is installed on the wheel axle of the adjacent wire wheel.

6. A ground resistance test device for power distribution installation as claimed in claim 5, characterized in that: The cleaning unit includes a hard mounting plate and a soft lining, a through hole is opened on the horizontal section, and a rotating positioning rod is rotatably connected to the side of the mounting plate away from the lining through a pin shaft, a torsion spring is installed on the pin shaft, one end of the rotating positioning rod can pass through the through hole, and a protrusion is arranged on the outer side of the horizontal section, a connecting hole is arranged on the protrusion, and an ear hole that can be connected to the connecting hole is also formed at the end of the rotating positioning rod, screws are passed through the ear holes and the connecting holes, and nuts are spirally installed at both ends of the screw.

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