Grounding resistance tester for electromechanical installation engineering

Abstract

The invention discloses a grounding resistance tester for electromechanical installation engineering, and relates to the technical field of electromechanical installation engineering, the grounding resistance tester comprises a tester main body, the outer side of the tester main body is rotatably connected with a box body, the side surface of the box body is rotatably connected with a box door, the inner side of the box body is provided with a winding assembly, and the winding assembly comprises a connecting unit arranged at the inner side of the box body. A first winding drum and a second winding drum are rotationally connected to the inner side of the box body, clamping plates are symmetrically and movably connected to the inner sides of the first winding drum and the second winding drum, a wire harness is inserted into the inner sides of the first winding drum and the second winding drum and clamped and fixed through the clamping plates, and the wire harness is stored when the first winding drum rotates. According to the wire harness winding device, by arranging the winding assembly, the rotation speed ratio of the first winding drum to the second winding drum is two fifths, it is ensured that synchronous winding of wire harnesses of different lengths or diameters is completed, and the ending work of a test can be rapidly finished.

Description

Technical Field

[0001] The present invention relates to the technical field of electromechanical installation engineering, in particular to a ground resistance tester for electromechanical installation engineering. Background Art

[0002] The grounding system is a core infrastructure for ensuring electrical safety in electromechanical installation projects. Essentially, it forms a low-impedance electrical connection between electrical equipment and metal components and the earth through conductors. Ground resistance is the only quantitative indicator of grounding system performance, and its value directly determines its effectiveness. A ground resistance tester accurately measures this value, providing key support for project acceptance, operation, and maintenance. It eliminates interference from uneven soil resistivity and conductor resistance, with an accuracy of ±0.5% to 1% (four-wire method). Multi-point testing can also locate grounding grid breaks and corrosion points (e.g., rusted grounding steel bars at substations causing a surge in resistance).

[0003] After the test is completed, the operator needs to manually wind the wire harness (such as test wires and ground electrode leads) into the instrument storage compartment or tool bag. Manual winding is time-consuming. Dust, metal debris, and corrosive liquids at the test site (such as construction sites and chemical plants) are easily attached to the surface of the wire harness. There is no cleaning step during manual storage. Impurities accumulate over a long period of time and become embedded in the cable sheath, reducing insulation resistance and causing leakage risks. Therefore, a ground resistance tester for electromechanical installation projects is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art, such as the long time-consuming manual winding, the lack of cleaning steps during manual storage, the long-term accumulation of impurities leading to their embedding into the cable sheath, reducing insulation resistance and causing leakage risks. A ground resistance tester for electromechanical installation engineering is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The utility model relates to a ground resistance tester for electromechanical installation engineering, comprising a tester main body, the outer side of the tester main body is rotatably connected to a box body, the side of the box body is rotatably connected to a box door, and a winding assembly is provided on the inner side of the box body, and the winding assembly comprises a connecting unit provided on the inner side of the box body, a first winding drum and a second winding drum rotatably connected to the inner side of the box body, the inner sides of the first winding drum and the second winding drum are symmetrically and movably connected with clamping plates, the wiring harness is respectively inserted into the inner sides of the first winding drum and the second winding drum and clamped and fixed by the clamping plates, the wiring harness is stored when the first winding drum rotates, and the second winding drum is driven to rotate by the connecting unit to store the wiring harness when the first winding drum rotates, and the rotation ratio of the first winding drum and the second winding drum is two-fifths, and manual winding is unnecessary. The roll can quickly finish the finishing work of the test, and a winding processing component is provided on the box body, and the winding processing component includes a transmission unit, a telescopic rod slidingly arranged on the inside of the box body, fan blades symmetrically connected to the outside of the telescopic rod, a first rotating wheel and a second rotating wheel respectively connected to the outside of the telescopic rod, a second transmission belt jointly sleeved on the first rotating rod and the second rotating wheel, and a plurality of bristles installed on the inside of the second transmission belt. When the first winding drum and the second winding drum are transmitted, the first rotating wheel, the second rotating wheel and the fan blades are driven to rotate by the transmission unit, and the first rotating wheel and the second rotating wheel are rotated through the second transmission belt. When the second transmission belt rotates, impurities are processed through the wire harness being wound, and the wind force generated when the fan blades rotates blows away the processed impurities to ensure the neatness of the wire harness.

[0007] The above technical solution further includes:

[0008] The inner sides of the first winding drum and the second winding drum are both provided with open grooves, and round rods are symmetrically installed on the inner sides of the open grooves. The outer sides of the round rods to which the clamping plates are rotatably connected are provided with torsion springs, and the torsion springs are fixedly connected to the clamping plates. The force generated by the contraction of the torsion springs causes the two clamping plates to clamp the ends of the wiring harness.

[0009] The connecting unit includes a first support plate installed on the inner side of the box body, a first rotating rod is rotatably connected to the side of the first support plate, a second gear is installed on the end of the first rotating rod away from the first support plate, and a first gear is installed on the end of the first winding drum. The first gear and the second gear are engaged with each other, and when the first winding drum rotates, the first rotating rod can be driven to rotate by the first gear and the second gear.

[0010] A second rotating rod is installed at the end of the second winding drum, and a fifth rotating rod is rotatably connected to the side of the first support plate. A fourth gear is installed on the outer side of the fifth rotating rod, and a third gear is installed on the outer side of the first rotating rod. The third gear is meshed with the fourth gear, and a first transmission belt is commonly sleeved on the outer sides of the second rotating rod and the fifth rotating rod.

[0011] A sliding groove is provided on the inner side of the box body, and a sliding block is slidingly provided on the inner side of the sliding groove. A spring is installed on the side of the sliding block, and the end of the spring away from the sliding block is fixedly connected to the inner wall of the sliding groove. The sliding block is fixedly connected to the U-shaped plate. The spring in the contracted state is reset, thereby driving the second transmission belt to move to the outside of the box body through the sliding block.

[0012] The size of the sliding groove opening is adapted to the size of the sliding block, and the cross sections of the sliding groove and the sliding block are both convex.

[0013] The transmission unit includes a telescopic rod rotatably connected to the side of the U-shaped plate, a second support plate is installed on the inner side of the box body, the second support plate is rotatably connected to the telescopic rod, a second bevel gear is installed on the end of the telescopic rod away from the U-shaped plate, and a first bevel gear is installed on the outer side of the first winding drum, and the first bevel gear is meshed with the second bevel gear.

[0014] The side surface of the U-shaped plate is symmetrically connected to the third rotating rod, the third rotating rod on one side of the telescopic rod is fixedly connected to the telescopic rod, the first rotating wheel and the second rotating wheel are both fixedly connected to the third rotating rod, and when the first winding drum and the second winding drum rotate, they respectively drive the first rotating wheel and the second rotating wheel to rotate.

[0015] The side surface of the U-shaped plate is symmetrically connected to a fourth rotating rod, the fan blades are installed on the outside of the fourth rotating rod, and a third transmission belt is commonly sleeved between the fourth rotating rod and the third rotating rod.

[0016] The side surface of the box body is rotatably connected with a rotating handle, and the rotating handle is fixedly connected to the first winding drum, and the first winding drum is driven to rotate by the rotating handle.

[0017] The present invention has the following beneficial effects:

[0018] 1. In the present invention, by setting up a winding assembly, the first winding drum and the second winding drum achieve a two-fifths speed ratio, ensuring that wire harnesses of different lengths or diameters are wound synchronously, without the need for manual winding, and the finishing work of the test can be quickly completed.

[0019] 2. In the present invention, a winding processing component is provided to make the bristles swing back and forth, directly cleaning impurities on the surface of the wire harness. At the same time, the fan blades are driven to rotate to form a directional airflow, which blows impurities such as dust and metal debris cleaned by the bristles out of the wire harness, ensuring the cleanliness of the wire harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a ground resistance tester for electromechanical installation engineering proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the overall top view structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the side cross-sectional structure of the box body in the present invention;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure at center A;

[0024] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 6 for Figure 2 A magnified schematic diagram of the structure at point C in the middle;

[0026] Figure 7 for Figure 3 A magnified schematic diagram of the structure at D in the middle;

[0027] Figure 8 for Figure 3 Enlarged schematic diagram of the structure at E in the middle.

[0028] In the figure: 1. tester body; 2. box body; 3. box door; 4. first take-up drum; 5. second take-up drum; 6. first gear; 7. first support plate; 8. first rotating rod; 9. second gear; 10. second rotating rod; 11. first transmission belt; 12. first bevel gear; 13. U-shaped plate; 14. telescopic rod; 15. second bevel gear; 16. second support plate; 17. third rotating rod; 18. first rotating wheel; 19. second transmission belt; 20. fourth rotating rod; 21. fan blade; 22. third transmission belt; 23. sliding groove; 24. sliding block; 25. spring; 26. opening groove; 27. round rod; 28. clamping plate; 29. ​​torsion spring; 30. bristles; 31. rotating handle; 32. second rotating wheel; 33. third gear; 34. fourth gear; 35. fourth rotating rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figure 1 - Figure 8As shown, the present invention proposes a ground resistance tester for electromechanical installation engineering, including a tester main body 1, the outer side of the tester main body 1 is rotatably connected to a box body 2, the side of the box body 2 is rotatably connected to a box door 3, and the inner side of the box body 2 is provided with a winding assembly, which includes a connecting unit provided on the inner side of the box body 2, a first winding drum 4 and a second winding drum 5 rotatably connected to the inner side of the box body 2, the inner sides of the first winding drum 4 and the second winding drum 5 are symmetrically and movably connected with a clamping plate 28, the wiring harness is respectively inserted into the inner sides of the first winding drum 4 and the second winding drum 5 and clamped and fixed by the clamping plate 28, the wiring harness is stored when the first winding drum 4 rotates, and the second winding drum 5 is driven to rotate by the connecting unit to store the wiring harness, the rotation ratio of the first winding drum 4 and the second winding drum 5 is two-fifths, and manual winding is not required, and the test can be quickly ended. For the finishing work, a winding processing component is provided on the box body 2, and the winding processing component includes a transmission unit, a telescopic rod 14 slidingly arranged on the inside of the box body 2, fan blades 21 symmetrically connected to the outside of the telescopic rod 14 for rotation, a first rotating wheel 18 and a second rotating wheel 32 respectively connected to the outside of the telescopic rod 14 for rotation, a second transmission belt 19 jointly sleeved on the first rotating rod 8 and the second rotating wheel 32, and a plurality of bristles 30 installed on the inside of the second transmission belt 19. When the first winding drum 4 and the second winding drum 5 are transmitted, the first rotating wheel 18, the second rotating wheel 32 and the fan blades 21 are driven to rotate by the transmission unit. When the first rotating wheel 18 and the second rotating wheel 32 rotate, they are rotated through the second transmission belt 19. When the second transmission belt 19 rotates, impurities are processed through the wire harness being wound. The wind force generated when the fan blades 21 rotates will blow away the processed impurities to ensure the neatness of the wire harness.

[0032] An open groove 26 is provided on the inner side of the first winding drum 4 and the second winding drum 5. A round rod 27 is symmetrically installed on the inner side of the open groove 26. The clamping plate 28 is rotatably connected to the outer side of the round rod 27. A torsion spring 29 is installed on the outer side of the round rod 27. The torsion spring 29 is fixedly connected to the clamping plate 28. The force generated by the contraction of the torsion spring 29 causes the two clamping plates 28 to clamp the ends of the wire harness.

[0033] The connecting unit includes a first support plate 7 installed on the inner side of the box body 2, and the side of the first support plate 7 is rotatably connected to the first rotating rod 8. The end of the first rotating rod 8 away from the first support plate 7 is installed with a second gear 9, and the end of the first winding drum 4 is installed with a first gear 6. The first gear 6 and the second gear 9 are engaged with each other. When the first winding drum 4 rotates, the first rotating rod 8 can be driven to rotate by the first gear 6 and the second gear 9.

[0034] A second rotating rod 10 is installed at the end of the second winding drum 5, and a fifth rotating rod 35 is rotatably connected to the side of the first support plate 7. A fourth gear 34 is installed on the outer side of the fifth rotating rod 35, and a third gear 33 is installed on the outer side of the first rotating rod 8. The third gear 33 is meshed with the fourth gear 34. The outer sides of the second rotating rod 10 and the fifth rotating rod 35 are jointly sleeved with a first transmission belt 11. When the first rotating rod 8 rotates, the second rotating rod 10 and the second winding drum 5 are driven to rotate through the first transmission belt 11.

[0035] A rotating handle 31 is rotatably connected to the side of the box body 2 . The rotating handle 31 is fixedly connected to the first winding drum 4 , and the first winding drum 4 is driven to rotate by the rotating handle 31 .

[0036] In this embodiment, when the tester body 1 is needed, the wire harness is inserted into the tester body 1, and then the resistance test is performed. After the test is completed, the end of the wire harness can be inserted into the open slot 26 and placed between the two clamping plates 28. When the wire harness is in the two clamping plates 28, the clamping plates 28 are driven to rotate, thereby driving the torsion spring 29 to contract. The force generated by the contraction of the torsion spring 29 causes the two clamping plates 28 to clamp the end of the wire harness. Then, the first reel 4 is rotated by turning the handle 31. Since the first gear 6 is engaged with the second gear 9, When the first winding drum 4 rotates, the first rotating rod 8 can be driven to rotate through the first gear 6 and the second gear 9. When the first rotating rod 8 rotates, the fourth rotating rod 35 is driven to rotate through the third gear 33 and the fourth gear 34. When the fourth rotating rod 35 rotates, the second rotating rod 10 is driven to rotate through the first transmission belt 11, thereby driving the second winding drum 5 to rotate. In this way, the two wire harnesses can be stored at the same time through the rotation of the first winding drum 4 and the second winding drum 5, and the rotation ratio of the first winding drum 4 and the second winding drum 5 is two-fifths, so that the two wire harnesses can be stored at the same time.

[0037] Example 2

[0038] like Figure 1 - Figure 8 As shown, based on the first embodiment, a sliding groove 23 is provided on the inner side of the box body 2, and a sliding block 24 is slidingly provided on the inner side of the sliding groove 23. A spring 25 is installed on the side of the sliding block 24. The end of the spring 25 away from the sliding block 24 is fixedly connected to the inner wall of the sliding groove 23, and the sliding block 24 is fixedly connected to the U-shaped plate 13. The spring 25 in the contracted state is reset, thereby driving the second transmission belt 19 to move to the outside of the box body 2 through the sliding block 24.

[0039] The size of the opening of the sliding groove 23 matches the size of the sliding block 24 , and the cross-sections of the sliding groove 23 and the sliding block 24 are both convex.

[0040] The transmission unit includes a telescopic rod 14 rotatably connected to the side of the U-shaped plate 13, a second support plate 16 is installed on the inner side of the box body 2, the second support plate 16 is rotatably connected to the telescopic rod 14, and a second bevel gear 15 is installed on the end of the telescopic rod 14 away from the U-shaped plate 13, and a first bevel gear 12 is installed on the outer side of the first winding drum 4, and the first bevel gear 12 and the second bevel gear 15 are meshed.

[0041] The side of the U-shaped plate 13 is symmetrically connected to the third rotating rod 17 for rotation. The third rotating rod 17 on one side of the telescopic rod 14 is fixedly connected to the telescopic rod 14. The first rotating wheel 18 and the second rotating wheel 32 are both fixedly connected to the third rotating rod 17. When the first winding drum 4 and the second winding drum 5 rotate, they respectively drive the first rotating wheel 18 and the second rotating wheel 32 to rotate.

[0042] The side of the U-shaped plate 13 is symmetrically connected to the fourth rotating rod 20 , and the fan blades 21 are installed on the outside of the fourth rotating rod 20 . A third transmission belt 22 is sleeved between the fourth rotating rod 20 and the third rotating rod 17 .

[0043] In this embodiment, when the first winding drum 4 and the second winding drum 5 are needed to store the wire harness, the box door 3 can be opened at this time, and the spring 25 in the contracted state is reset, thereby driving the sliding block 24 to move along the sliding groove 23 until the second transmission belt 19 moves to the outside of the box body 2. When the first winding drum 4 rotates, it can drive the first bevel gear 12 to rotate. When the first bevel gear 12 rotates, it can drive the telescopic rod 14 to rotate through the second bevel gear 15. When the telescopic rod 14 rotates, it can drive the third rotating rod 17 to rotate. The third rotating rod When 17 rotates, it can drive the first rotating wheel 18 to rotate. When the first rotating wheel 18 rotates, it can drive the second transmission belt 19 to rotate through the rotation support of the second rotating wheel 32. When the second transmission belt 19 rotates, it drives multiple bristles 30 to move back and forth continuously, thereby scraping off impurities on the wire harness, and when the third rotating rod 17 rotates, it can drive the fourth rotating rod 20 to rotate through the third transmission belt 22. When the fourth rotating rod 20 rotates, it drives the fan blades 21 to rotate. The wind force generated by the rotation of the fan blades 21 blows away the impurities handled by the bristles 30.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A ground resistance tester for electromechanical installation engineering, comprising a tester body (1), characterized in that: The outer side of the tester main body (1) is rotatably connected to the box body (2), and the side of the box body (2) is rotatably connected to the box door (3). The inner side of the box body (2) is provided with a winding assembly, and the winding assembly includes a connecting unit provided on the inner side of the box body (2), a first winding drum (4) and a second winding drum (5) rotatably connected to the inner side of the box body (2), and the inner sides of the first winding drum (4) and the second winding drum (5) are symmetrically and movably connected with a clamping plate (28). The wire harness is inserted into the inner side of the first winding drum (4) and the second winding drum (5) respectively and clamped and fixed by the clamping plate (28). When the first winding drum (4) rotates, the wire harness is stored. When the first winding drum (4) rotates, the second winding drum (5) is driven to rotate by the connecting unit to store the wire harness. The rotation ratio of the first winding drum (4) to the second winding drum (5) is two-fifths. A winding processing assembly is provided on the box body (2). The winding processing component comprises a transmission unit, a telescopic rod (14) slidingly arranged on the inner side of the box body (2), a fan blade (21) symmetrically connected to the outer side of the telescopic rod (14), a first rotating wheel (18) and a second rotating wheel (32) respectively connected to the outer side of the telescopic rod (14), a second transmission belt (19) commonly sleeved on the first rotating rod (8) and the second rotating wheel (32), and a plurality of bristles (30) installed on the inner side of the second transmission belt (19); the first winding drum (4) and the second winding drum (5) drive the first rotating wheel (18), the second rotating wheel (32) and the fan blade (21) to rotate through the transmission unit during transmission; the first rotating wheel (18) and the second rotating wheel (32) rotate through the second transmission belt (19); the second transmission belt (19) rotates, and the impurities are processed through the winding wire harness when the second transmission belt (19) rotates; the wind force generated when the fan blade (21) rotates blows away the processed impurities.

2. A ground resistance tester for electromechanical installation engineering according to claim 1, characterized in that, An open groove (26) is provided on the inner side of each of the first winding drum (4) and the second winding drum (5), and a round rod (27) is symmetrically installed on the inner side of the open groove (26). The clamping plate (28) is rotatably connected to the outer side of the round rod (27), and a torsion spring (29) is installed on the outer side of the round rod (27). The torsion spring (29) is fixedly connected to the clamping plate (28).

3. A ground resistance tester for electromechanical installation engineering according to claim 2, characterized in that, The connecting unit comprises a first support plate (7) installed on the inner side of the box body (2), a first rotating rod (8) rotatably connected to the side of the first support plate (7), a second gear (9) installed on the end of the first rotating rod (8) away from the first support plate (7), a first gear (6) installed on the end of the first winding drum (4), and the first gear (6) and the second gear (9) are meshed with each other.

4. A ground resistance tester for electromechanical installation engineering according to claim 3, characterized in that: A second rotating rod (10) is installed at the end of the second winding drum (5), and a fifth rotating rod (35) is rotatably connected to the side of the first support plate (7). A fourth gear (34) is installed on the outer side of the fifth rotating rod (35), and a third gear (33) is installed on the outer side of the first rotating rod (8). The third gear (33) and the fourth gear (34) are meshed with each other. A first transmission belt (11) is commonly sleeved on the outer sides of the second rotating rod (10) and the fifth rotating rod (35).

5. A ground resistance tester for electromechanical installation engineering according to claim 4, characterized in that: A sliding groove (23) is provided on the inner side of the box body (2), a sliding block (24) is slidably provided on the inner side of the sliding groove (23), a spring (25) is installed on the side of the sliding block (24), and an end of the spring (25) away from the sliding block (24) is fixedly connected to the inner wall of the sliding groove (23), and the sliding block (24) is fixedly connected to the U-shaped plate (13).

6. A ground resistance tester for electromechanical installation engineering according to claim 5, characterized in that: The size of the opening of the sliding groove (23) is adapted to the size of the sliding block (24), and the cross sections of the sliding groove (23) and the sliding block (24) are both convex.

7. A ground resistance tester for electromechanical installation engineering according to claim 1, characterized in that: The transmission unit comprises a telescopic rod (14) rotatably connected to the side of the U-shaped plate (13); a second support plate (16) is installed on the inner side of the box body (2); the second support plate (16) is rotatably connected to the telescopic rod (14); a second bevel gear (15) is installed on one end of the telescopic rod (14) away from the U-shaped plate (13); a first bevel gear (12) is installed on the outer side of the first winding drum (4); the first bevel gear (12) and the second bevel gear (15) are meshed.

8. A ground resistance tester for electromechanical installation engineering according to claim 7, characterized in that: The side surface of the U-shaped plate (13) is symmetrically connected to a third rotating rod (17), the third rotating rod (17) on one side of the telescopic rod (14) is fixedly connected to the telescopic rod (14), and the first rotating wheel (18) and the second rotating wheel (32) are both fixedly connected to the third rotating rod (17).

9. A ground resistance tester for electromechanical installation engineering according to claim 8, characterized in that: The side surface of the U-shaped plate (13) is symmetrically connected to a fourth rotating rod (20), the fan blade (21) is installed on the outside of the fourth rotating rod (20), and a third transmission belt (22) is sleeved between the fourth rotating rod (20) and the third rotating rod (17).

10. A ground resistance tester for electromechanical installation engineering according to claim 1, characterized in that: A rotating handle (31) is rotatably connected to the side of the box body (2), and the rotating handle (31) is fixedly connected to the first winding drum (4).

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