Take-up and pay-off device for ground resistance measurement

Abstract

The utility model discloses a take-up and pay-off device for ground resistance measurement, and particularly relates to the technical field of take-up and pay-off devices, the take-up and pay-off device for ground resistance measurement comprises a base, the top of the base is sequentially provided with first supports which are symmetrically arranged from left to right, and the take-up and pay-off device can be linked with a motor and continuously drive a first sliding block to drive a guide pipe to move front and back through a flat cable cleaning mechanism; the measuring wire is driven to move, so that the wire wound on the winding disc is uniformly arranged, disorder is avoided, meanwhile, the rotating shaft and the gear are driven to be matched with the rack to drive the gear to rotate, the collecting box is continuously driven to drive the brush ring to reciprocate left and right to brush the surface of the measuring wire, and cleaned impurities are collected into the collecting box. The abrasion of the outer wall of the wire caused by impurities such as soil adhered to the surface is avoided, the service life is shortened, and the practicability is higher; and through the pay-off assembly, the conveying roller below is driven to rotate during pay-off, the measuring wire is conveyed in the direction away from one side of the reciprocating lead screw, and the auxiliary pay-off function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-retracting and -releasing devices, in particular to a wire-retracting and -releasing device for measuring ground resistance. Background Art

[0002] Grounding resistance is a key indicator of the overall current dissipation performance of the grounding grid, and is also the most important parameter in the safety index of the grounding grid. It is an important indicator for measuring the effectiveness and safety of the grounding system. Commonly used methods for measuring grounding resistance of the grounding grid include the current-voltage meter three-pole method and the potential drop method. Both of these grounding resistance test methods require the laying of measurement lines along the ground.

[0003] At present, in order to ensure the accuracy of the test results, the standard stipulates that a measuring line 3 to 5 times the maximum diagonal length of the grounding grid needs to be laid. When measuring the grounding resistance of a large grounding grid, the laid measuring line is very long, and a wire-reeling device needs to be used to reel the measuring cable to avoid it being scattered. The traditional way of reeling in and out is to fix one end of the measuring line and then rotate the wire reel to reel it in and out, but it lacks a structure for evenly arranging the reeled wire, which causes the reeled wire to be messy and easily tangled together. In addition, some dirt and other debris will adhere to the surface of the measuring line after use. If it is not cleaned, it will cause wear on the measuring line, reducing its service life, and its practicality is relatively poor. Utility Model Content

[0004] The utility model aims to provide a wire-retracting and -releasing device for measuring ground resistance, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a wire-reeling device for measuring ground resistance, comprising a base, wherein symmetrically arranged brackets 1 are respectively arranged on the top of the base from left to right, a winding reel is rotatably installed between the brackets 1, one end of the winding reel is connected to a motor outside the bracket 1, a wire arrangement cleaning mechanism is provided on one side of the winding reel at the top of the base, and a wire-reeling assembly is provided on one side of the wire arrangement cleaning mechanism, the wire arrangement cleaning mechanism comprises bracket 2, and the bracket 2 is symmetrically arranged on the top of the base, a reciprocating screw rod is rotatably installed between the brackets 2, a guide rod is provided below the reciprocating screw rod, a matching sleeve is provided on the outer side of the reciprocating screw rod with a movable slider 1, and a lower end of the slider is slidably sleeved on the outer side of the guide rod, a guide tube is connected to the top of the slider 1, and support rods are symmetrically arranged on the outer side of the guide tube, two brush rings are arranged between the support rods, a slider 2 is symmetrically arranged on the outer wall of the brush ring, and a slide groove adapted to the slider 2 is symmetrically opened relative to the inner wall of the support rod, a collecting box is provided below the slider 2, and a fixing frame is provided on the inner side of the collecting box at the bottom of the slider 2.

[0006] Furthermore, the cable cleaning mechanism also includes a rack, and the rack is fixedly installed on one side of the two brackets. One side of the slider is provided with a rotating shaft rotatably connected to the slider, the lower end of the rotating shaft is connected to a gear meshing with the rack, the upper end of the rotating shaft is connected to a turntable, the top of the turntable is movably connected to the collection box through a connecting rod, one side of the collection box is provided with a notch adapted to the fixed frame, the front inner wall of the collection box is provided with a jack adapted to one end of the fixed frame, the front end of the collection box is connected to the fixed frame by a bolt, the outer side of the output end of one end of the reciprocating screw rod is provided with a double-row sprocket on the outer shell of the bracket two, and the outer side of the output end of the motor is provided with a There is a single-row sprocket wheel 1, and the single-row sprocket wheel 1 and the double-row sprocket wheel are connected by a chain. The arrangement of the wire arrangement and cleaning mechanism can be linked with the motor to drive the slider wheel 1 to move back and forth to drive the guide tube to move, thereby driving the wound measuring line to move and arrange it so that it is evenly wound onto the winding disk to avoid the wound measuring line being messy. At the same time, the movement of the slider wheel 1 can be used in conjunction with the arrangement of the rack to drive the collecting box to move back and forth left and right, so that the brush ring can clean the impurities such as soil adhered to the surface of the measuring line and collect them in the collecting box to avoid the adhered impurities such as soil causing wear to the measuring line and reducing its service life.

[0007] Furthermore, the line-releasing assembly includes a third bracket, and the third bracket is symmetrically arranged on one side of the top of the base, and conveying rollers are rotatably installed between the third brackets, and one end of the roller shaft of the conveying roller below is provided with a transmission sleeve on the outer side of the third bracket, and one end of the transmission sleeve is connected to a docking block, and the inner wall of the transmission sleeve is symmetrically provided with guide grooves, and a limiting strip connected to the conveying roller is provided in the guide groove. A support plate is provided on one side of the docking block on the top of the base, and a rotating rod penetrating the support plate is rotatably installed on one side of the support plate, and one end of the rotating rod is connected to the pair The connecting block is adapted to a docking seat, and a single-row sprocket two is sleeved on the outer side of one end of the rotating rod away from the docking seat, and the single-row sprocket two is connected to the double-row sprocket through a chain. A hydraulic cylinder is provided on one side of the support plate below the single-row sprocket two, and the telescopic end of the hydraulic cylinder passes through the support plate and is connected to a push plate, and the upper end of the push plate is rotatably connected to the transmission sleeve. The setting of the wire-releasing assembly can be linked with the reciprocating screw rod. When the motor drives the winding reel to rotate in the opposite direction to loosen the measuring line, the conveying roller located below can be driven to rotate, thereby driving the measuring line to move outward to realize auxiliary wire-releasing.

[0008] Furthermore, a plurality of rolling balls are movably embedded in the inner wall of the guide tube, the fixed frame is a T-shaped structure, one end of the two support rods is connected to a mounting frame, and symmetrically arranged guide wheels are rotatably installed in the mounting frame. The arrangement of the rolling balls reduces the friction between the guide tube and the diameter of the measuring line, making it easier to move.

[0009] Furthermore, the rotating shaft is connected to the slider through a support block, and the rotating shaft is rotatably connected to the support block through a bearing, and the two ends of the connecting rod are respectively hinged to the turntable and the collection box to support and fix the rotating shaft.

[0010] Furthermore, the push plate is rotatably connected to the transmission sleeve via a bearing, and the docking block is a truncated cone structure so that the docking block can be docked with the docking seat to achieve power transmission.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0012] 1. The utility model can be linked with the motor through the wire arrangement and cleaning mechanism to continuously drive the slider to drive the guide tube to move back and forth, thereby driving the measuring line to move, so that the wire wound on the winding disk is evenly arranged to avoid clutter. At the same time, it will also drive the rotating shaft and gear, and cooperate with the rack to drive the gear to rotate, thereby continuously driving the collection box to drive the brush ring to move back and forth to clean the surface of the measuring line, and collect the cleaned impurities into the collection box, so as to avoid the dirt and other impurities adhering to the surface of the line causing wear on the outer wall of the line, reducing its service life, and making it more practical;

[0013] 2. The utility model can be linked with the reciprocating screw rod through the wire-releasing assembly, and drive the conveying roller below to rotate when the wire is released, so as to convey the measuring wire to the side away from the reciprocating screw rod, thereby playing the function of assisting the wire-releasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial front view structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure between the slider 1, the guide tube and the collection box of the utility model;

[0018] Figure 4 It is a structural schematic diagram between the docking seat and the docking block of the utility model;

[0019] Figure 5 This utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 6 This utility model Figure 2 A schematic diagram of the enlarged structure of B;

[0021] Figure 7 It is a schematic diagram of the three-pole method of the current-voltage meter of the utility model;

[0022] Figure 8 It is a schematic diagram of the potential fall method of the utility model;

[0023] In the figure: 1. base; 2. bracket 1; 3. winding reel; 4. motor; 5. bracket 2; 6. reciprocating screw; 7. slider 1; 8. guide rod; 9. guide tube; 10. support rod; 11. brush ring; 12. slider 2; 13. fixed frame; 14. collecting box; 15. rack; 16. rotating shaft; 17. gear; 18. turntable; 19. connecting rod; 20. bracket 3; 21. conveyor roller; 22. transmission sleeve; 23. limit strip; 24. docking block; 25. docking seat; 26. support plate; 27. rotating rod; 28. hydraulic cylinder; 29. ​​single-row sprocket 1; 30. double-row sprocket; 31. single-row sprocket 2; 32. chain; 33. push plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 - Figure 8 The wire-winding and releasing device for measuring ground resistance shown in the figure comprises a base 1, and symmetrically arranged brackets 2 are arranged on the top of the base 1 from left to right, respectively. A winding reel 3 is rotatably installed between the brackets 1 and 2, and one end of the winding reel 3 is connected to a motor 4 outside the bracket 1 and 2. A wire-arranging and cleaning mechanism is arranged on one side of the winding reel 3 at the top of the base 1, and a wire-releasing assembly is arranged on one side of the wire-arranging and cleaning mechanism. The wire-arranging and cleaning mechanism comprises a bracket 2 5, and the bracket 2 5 is symmetrically arranged on the top of the base 1. A reciprocating screw rod 6 is rotatably installed between the brackets 2 and 5, and the reciprocating screw rod A guide rod 8 is provided below 6, a movable slider 7 is provided on the outer side of the reciprocating screw rod 6, and the lower end of the slider 7 is slidably sleeved on the outer side of the guide rod 8. A guide tube 9 is connected to the top of the slider 7, and support rods 10 are symmetrically provided on the outer side of the guide tube 9. Two brush rings 11 are provided between the support rods 10. Slide blocks 12 are symmetrically provided on the outer wall of the brush rings 11, and slide grooves adapted to the slide blocks 12 are symmetrically opened relative to the inner wall of the support rods 10. A collection box 14 is provided below the slide block 12, and a fixing frame 13 is provided on the inner side of the collection box 14 at the bottom of the slide block 12. In this example, the commonly used measurement methods for the grounding resistance of the grounding grid include the following: Figure 7 The current-voltage meter three-pole method shown and Figure 8The potential drop method shown in the figure. In both methods, the current electrode C and the potential electrode P connected to the grounding grid G ​​to be measured are arranged horizontally, and the measuring lines connected to the grounding grid G ​​to be measured are arranged respectively, wherein the line length d of the current electrode C is CG It is 3 to 5 times the maximum diagonal length D of the grounding grid G ​​under test. The potential electrode P is arranged at the zero potential point so that the current can be injected into the grounding grid G ​​under test through the current electrode C. In this example, Figure 8In the figure: G is the grounding device under test; C is the current electrode; P is the potential electrode; D is the maximum diagonal length of the grounding device under test; D is the distance between the current electrode and the center of the grounding device under test; x is the distance between the potential electrode and the edge of the grounding device under test; D is the test distance interval; in this example, the cable cleaning mechanism also includes a rack 15, and the rack 15 is fixedly installed on one side of the two brackets 5, and a rotating shaft 16 rotatably connected to the slider 7 is provided on one side of the slider 7, and a gear 17 meshing with the rack 15 is connected to the lower end of the rotating shaft 16, and a turntable 18 is connected to the upper end of the rotating shaft 16. The top of the turntable 18 is movably connected to the collection box 14 through a connecting rod 19, and a notch adapted to the fixed frame 13 is provided on one side of the collection box 14, and a jack adapted to one end of the fixed frame 13 is provided on the front inner wall of the collection box 14. The front end of the collection box 14 is connected to the fixed frame 13 by bolts The outer side of the output end of the reciprocating screw rod 6 is provided with a double-row sprocket 30 on the outer sleeve of the bracket 2 5, and the outer side of the output end of the motor 4 is provided with a single-row sprocket 29. The single-row sprocket 29 and the double-row sprocket 30 are connected by a chain 32. The arrangement of the wire arrangement and cleaning mechanism can be linked with the motor 4, and can reciprocately drive the slider 7 to drive the guide tube 9 to move, thereby driving the wound measuring line to move, arrange it, and make it evenly wound onto the winding disk 3 to avoid the mess of the wound measuring line. At the same time, the movement of the slider 7 can be used in conjunction with the arrangement of the rack 15 to drive the collecting box 14 to reciprocate left and right, so that the brush ring 11 can clean the dirt and other impurities adhered to the surface of the measuring line, and collect them in the collecting box 14, so as to avoid the adhered dirt and other impurities causing wear of the measuring line and reducing its service life. In this example, the line-releasing assembly includes a bracket 3 20, and the bracket 3 20 is symmetrically arranged on one side of the top of the base 1, and conveying rollers 21 are rotatably installed between the brackets 3 20 and the bottom. One end of the roller shaft of the lower conveying roller 21 is sleeved with a transmission sleeve 22 on the outer side of the bracket 3 20, and one end of the transmission sleeve 22 is connected to a docking block 24. The inner wall of the transmission sleeve 22 is symmetrically provided with guide grooves, and a limiting strip 23 connected to the conveying roller 21 is provided in the guide groove. A support plate 26 is provided on one side of the docking block 24 at the top of the base 1, and a rotating rod 27 that penetrates the support plate 26 is rotatably installed on one side of the support plate 26, and one end of the rotating rod 27 is connected to a The docking seat 25 and the rotating rod 27 are sleeved with a single-row sprocket 31 on the outer side of one end away from the docking seat 25, and the single-row sprocket 31 is connected to the double-row sprocket 30 through a chain 32. A hydraulic cylinder 28 is provided on one side of the support plate 26 below the single-row sprocket 31, and the telescopic end of the hydraulic cylinder 28 passes through the support plate 26 and is connected to a push plate 33, and the upper end of the push plate 33 is rotatably connected to the transmission sleeve 22. The arrangement of the pay-off assembly can be linked with the reciprocating screw rod 6. When the motor 4 drives the winding drum 3 to rotate in the opposite direction to loosen the measuring line, the conveying roller 21 located below can be driven to rotate, thereby driving the measuring line to move outward to achieve auxiliary pay-off.

[0026] In this example, a number of rolling balls are movably embedded in the inner wall of the guide tube 9, the fixed frame 13 is a T-shaped structure, one end of the two support rods 10 is connected to a mounting frame, and a symmetrically arranged guide wheel is rotatably installed in the mounting frame. The arrangement of the rolling balls reduces the friction between the guide tube 9 and the diameter of the measuring line, making it easier to move. In this example, the rotating shaft 16 is connected to the slider 7 through a support block, and the rotating shaft 16 is rotatably connected to the support block through a bearing. The two ends of the connecting rod 19 are respectively hinged to the turntable 18 and the collection box 14 to support and fix the rotating shaft 16. In this example, the push plate 33 is rotatably connected to the transmission sleeve 22 through a bearing, and the docking block 24 is a truncated cone structure so that the docking block 24 can dock with the docking seat 25 to achieve power transmission.

[0027] The working principle of the utility model is as follows: when the measuring line needs to be wound up, one end is passed through between the two conveying rollers 21 and connected to the winding disk 3 after passing through the brush ring 11 and the guide tube 9. The motor 4 is started to drive the winding disk 3 to rotate to wind up the measuring line. At the same time, the reciprocating screw rod 6 is driven to rotate in cooperation with the single-row sprocket 29, the double-row sprocket 30 and the chain 32, so that it drives the slider 17 to reciprocate back and forth, and at the same time drives the guide tube 9 to move, so as to achieve uniform distribution of the measuring line, so that it is evenly arranged and wound up on the winding disk 3. At the same time, the slider 17 drives the rotating shaft 16 and the gear 17 to move synchronously. The gear 17 drives the gear 17 to drive the rotating shaft 16 to rotate under the action of the rack 15, and the rotating shaft 16 drives the turntable 18 to rotate, so that it drives the connecting rod 19 to drive the collecting box 14. The collecting box 14 drives the slider 2 12 to move through the fixing frame 13, and cooperates with the slider 2 1 2 and the support rod 10, it reciprocates left and right, so that the brush ring 11 cleans the measuring line and collects the debris on the surface of the line into the collecting box 14, so as to avoid the adhered impurities from wearing the surface of the measuring line and affecting its service life; and when it is necessary to release the line, the motor 4 can be rotated in the opposite direction and the hydraulic cylinder 28 can be started at the same time, so that it drives the push plate 33 and then drives the transmission sleeve 22 to move along one end of the conveying roller 21, thereby driving the docking block 24 to be inserted into the docking seat 25 to achieve docking, and at the same time, the connection between the single-row sprocket 31, the chain 32 and the double-row sprocket 30 transmits power, thereby transmitting the power to the transmission sleeve 22, and the limit strip 23 drives the connected conveying roller 21 to rotate synchronously, so that the conveying roller 21 below conveys the measuring line to move away from the reciprocating screw rod 6, which plays the role of auxiliary line release, is easy to use, and has stronger practicality.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wire-reeling device for measuring ground resistance, comprising a base (1), wherein the top of the base (1) is provided with symmetrically arranged brackets (2) from left to right, a winding reel (3) is rotatably mounted between the brackets (2), and one end of the winding reel (3) is connected to a motor (4) outside the bracket (2), wherein: A wire arrangement and cleaning mechanism is provided on one side of the winding reel (3) at the top of the base (1), and a wire release assembly is provided on one side of the wire arrangement and cleaning mechanism. The wire arrangement and cleaning mechanism comprises a second bracket (5), and the second bracket (5) is symmetrically arranged on the top of the base (1). A reciprocating screw rod (6) is rotatably installed between the second bracket (5), and a guide rod (8) is provided below the reciprocating screw rod (6). A movable sliding block (7) is provided on the outer side of the reciprocating screw rod (6), and the lower end of the sliding block (7) is slidably sleeved on the guide rod (8). On the outside, the top of the slider (7) is connected to a guide tube (9), and support rods (10) are symmetrically arranged on the outside of the guide tube (9). Two brush rings (11) are arranged between the support rods (10), and the outer wall of the brush ring (11) is symmetrically provided with a slider (12), and the support rod (10) is symmetrically provided with a slide groove adapted to the slider (12) relative to the inner wall, and a collection box (14) is arranged below the slider (12), and a fixing frame (13) is arranged at the bottom of the slider (12) on the inner side of the collection box (14).

2. The wire-retracting and paying-out device for measuring ground resistance according to claim 1, characterized in that: The cable cleaning mechanism further comprises a rack (15), and the rack (15) is fixedly mounted on one side of the two brackets (5); a rotating shaft (16) rotatably connected to the slider (7) is provided on one side of the slider (7); a gear (17) meshing with the rack (15) is connected to the lower end of the rotating shaft (16); a rotating disk (18) is connected to the upper end of the rotating shaft (16); the top of the rotating disk (18) is movably connected to the collection box (14) through a connecting rod (19); and a rotating shaft (18) is provided on one side of the collection box (14) A notch is provided to match the fixing frame (13); a socket is provided on the inner wall of the front side of the collecting box (14) to match one end of the fixing frame (13); the front end of the collecting box (14) is connected to the fixing frame (13) by bolts; a double-row sprocket (30) is provided on the outer side of the output end of one end of the reciprocating screw rod (6) and the outer sleeve of the bracket 2 (5); a single-row sprocket 1 (29) is provided on the outer side of the output end of the motor (4); and the single-row sprocket 1 (29) and the double-row sprocket (30) are connected by a chain (32).

3. The wire-retracting and paying-out device for measuring ground resistance according to claim 2, characterized in that: The wire-releasing assembly comprises a bracket three (20), and the bracket three (20) is symmetrically arranged on one side of the top of the base (1), and conveying rollers (21) are rotatably installed between the bracket three (20) up and down, and one end of the roller shaft of the conveying roller (21) below is sleeved with a transmission sleeve (22) on the outer side of the bracket three (20), and one end of the transmission sleeve (22) is connected to a docking block (24), and the inner wall of the transmission sleeve (22) is symmetrically provided with guide grooves, and a limit strip (23) connected to the conveying roller (21) is arranged in the guide groove, and a support plate (26) is arranged on one side of the docking block (24) at the top of the base (1), and the support plate (26) is arranged on the outer side of the bracket three (20). 6) A rotating rod (27) penetrating the support plate (26) is rotatably installed on one side, and one end of the rotating rod (27) is connected to a docking seat (25) adapted to the docking block (24). A single-row sprocket (31) is sleeved on the outer side of one end of the rotating rod (27) away from the docking seat (25), and the single-row sprocket (31) is connected to the double-row sprocket (30) through a chain (32). A hydraulic cylinder (28) is provided on one side of the support plate (26) below the single-row sprocket (31), and the telescopic end of the hydraulic cylinder (28) penetrates the support plate (26) and is connected to a push plate (33), and the upper end of the push plate (33) is rotatably connected to the transmission sleeve (22).

4. The wire-retracting and -releasing device for measuring ground resistance according to claim 2, characterized in that: A plurality of rolling balls are movably embedded in the inner wall of the guide tube (9); the fixing frame (13) is a T-shaped structure; one end of the two support rods (10) is connected to a mounting frame, and symmetrically arranged guide wheels are rotatably mounted in the mounting frame.

5. The wire-retracting and -releasing device for measuring ground resistance according to claim 2, characterized in that: The rotating shaft (16) is connected to the slider (7) via a support block, and the rotating shaft (16) is rotatably connected to the support block via a bearing. The two ends of the connecting rod (19) are respectively hinged to the rotating disk (18) and the collecting box (14).

6. The wire-retracting and paying-out device for measuring ground resistance according to claim 3, characterized in that: The push plate (33) is rotatably connected to the transmission sleeve (22) via a bearing, and the docking block (24) is a truncated cone-shaped structure.

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