Stable insulator resistance measuring device

Abstract

The invention relates to a stable insulator resistance measuring device which comprises a placing frame, a bottom plate is arranged at the bottom of the placing frame, foot pads are fixedly arranged on the lower side of the bottom plate, supporting seats are symmetrically arranged above the bottom plate, each supporting seat comprises a pressing plate and a shell, each shell is fixedly arranged on the upper side of the corresponding pressing plate, and each pressing plate is fixedly connected with the corresponding shell. The top of the housing is provided with a placing groove, and the side of the placing groove is provided with a measuring chuck in a clamping manner. Through integrated optimization of a mechanical structure and a measurement system, the stability, the adaptability and the environmental adaptability of insulator resistance measurement are remarkably improved, and the insulator resistance measurement device can be widely applied.

Description

Technical Field

[0001] This invention belongs to the field of power testing equipment technology, specifically relating to a stable insulator resistance measuring device. Background Technology

[0002] In power systems, insulators serve as critical support and insulation components, and their resistance value is a core indicator for evaluating insulation performance and preventing flashover or aging faults. Traditional insulator resistance measurement typically relies on manual handheld measuring instruments (such as megohmmeters), using clamps to hold the insulator at both ends for contact measurement.

[0003] However, the following technical bottlenecks exist: the dimensions of insulators vary greatly depending on the voltage level, and existing measuring devices require frequent replacement of clamps or supports, resulting in low operating efficiency. In addition, insulators are mostly cylindrical or umbrella-shaped structures, and traditional clamps are difficult to achieve precise axial alignment, which can easily lead to data fluctuations due to poor contact during measurement; if the clamping force is too large, it may damage the porcelain or glass glaze, affecting the insulator's lifespan. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and solve the problems mentioned in the above-mentioned technical background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stable insulator resistance measuring device, comprising a placement frame, a base plate at the bottom of the placement frame, pads fixedly disposed on the underside of the base plate, and symmetrically arranged support seats above the base plate. Each support seat includes a pressure plate and a housing, the housing being fixedly disposed on the upper side of the pressure plate, and a placement groove at the top of the housing. A measuring clamp is snapped onto the side of the placement groove. The insulator is placed on the upper side of the placement frame, and its resistance can be measured using the measuring clamp.

[0006] The base plate is equipped with a displacement assembly, which includes a groove and a displacement screw. The groove is located on the surface of the base plate, and the displacement screw is connected to the groove via a bearing. Each of the two support seats has a sleeve at its bottom, and both sleeves pass through the groove and are screwed to the displacement screw. The displacement assembly is used to adjust the distance between the two support seats to accommodate different types of insulators.

[0007] The end of the displacement screw penetrates the side of the base plate, and the end of the displacement screw is provided with a handle. The internal threads of the two sleeves are in opposite directions.

[0008] The support base is equipped with a clamping assembly, which includes a vertical rod and two curved arms. The vertical rod is fixedly installed inside the housing, and the two curved arms are symmetrically hinged to both sides of the housing via external hinge blocks. The clamping assembly positions the insulator hardware inside the support base through the cooperation of the vertical rod and the curved arms.

[0009] A straight cylinder is movably sleeved on the outside of the vertical rod. The upper end of the straight cylinder passes through the placement groove. A support block is provided on the top of the straight cylinder. Inner hinge blocks are fixedly provided on both sides of the straight cylinder. A drive rod is fixedly provided on the lower side of the curved arm. A first connecting rod is hinged between the drive rod and the inner hinge block. A second connecting rod is hinged between the upper end of the curved arm and the measuring clamp.

[0010] The top of the housing is provided with a push-pull groove, and the lower side of the measuring clamp is provided with a push-pull block. The push-pull groove and the push-pull block cooperate with each other.

[0011] A return spring is hinged between the bottoms of the two crank arms.

[0012] A measuring probe is disposed in the middle of the measuring clamp. An inner rod is movably disposed inside the measuring probe. An internal spring is fixedly disposed between the inner end of the measuring probe and the measuring clamp. A terminal is disposed on the lower side of the inner rod. A winding roller is movably disposed inside the housing. A measuring circuit is wound around the outer side of the winding roller. The inner end of the measuring circuit is connected to the terminal, and the outer end of the measuring circuit is disposed with a connector. The measuring probe contacts the insulator fitting to perform resistance measurement.

[0013] A protective cover is hinged to the top of the base plate, and a handle is fixed to the outside of the protective cover. The protective cover provides good protection during the measurement process.

[0014] The protective cover has a sliding groove inside, and a pressure frame is movably installed inside the sliding groove. The pressure frame is engaged with the sliding groove by a sliding block. A telescopic rod is installed inside the pressure frame, and a telescopic spring is installed between the telescopic rod and the pressure frame. An arc-shaped clamp is fixedly installed at the bottom of the telescopic rod.

[0015] This invention provides a stable insulator resistance measuring device, which has the following advantages: The base plate adopts a double support base with a threaded displacement design. The distance between the two support bases can be quickly adjusted by rotating the displacement screw, which can be used to test different types of insulators.

[0016] In the clamping assembly, the vertical rod and the curved arm cooperate with each other, and the insulator gravity drive and spring automatic reset are used to realize the automatic centering of the whole process of "placement-clamping-measurement-release", avoiding positioning deviation caused by manual intervention.

[0017] Inside the measuring chuck, the measuring probe has an internal rod and an internal spring. The preload of the internal spring ensures continuous contact between the measuring probe and the insulator fitting, compensating for surface unevenness. The winding roller dynamically stores the measuring circuit, preventing it from being exposed and tangled. At the same time, the standardized design of the plug connector is compatible with various instruments.

[0018] The protective cover applies downward pressure to the top of the insulator through the pressure frame and arc-shaped clamp, forming a three-dimensional fixation with the bottom support block and measuring clamp to prevent the insulator from slipping during measurement; the telescopic spring adapts to insulators of different heights to avoid damaging the sheds; the sealed design of the protective cover isolates external environmental interference and improves measurement reliability. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of a stable insulator resistance measuring device according to the present invention.

[0020] Figure 2 This is a cross-sectional view of the shifting component of a stable insulator resistance measuring device according to the present invention.

[0021] Figure 3 This is a structural diagram of the support base for a stable insulator resistance measuring device according to the present invention.

[0022] Figure 4 This is a cross-sectional view of the support base of a stable insulator resistance measuring device according to the present invention.

[0023] Figure 5 This is a cross-sectional view of the measuring clamp of a stable insulator resistance measuring device according to the present invention.

[0024] Figure 6 This invention provides a stable insulator resistance measuring device. Figure 4 Enlarged view of section A.

[0025] Figure 7 This is a cross-sectional view of the pressure frame of a stable insulator resistance measuring device according to the present invention.

[0026] In the diagram: 1. Base plate; 2. Foot pad; 3. Support base; 4. Pressure plate; 5. Housing; 6. Placement slot; 7. Measuring clamp; 8. Groove; 9. Shifting screw; 10. Sleeve; 11. Handle; 12. Vertical rod; 13. Crank arm; 14. Straight cylinder; 15. Support block; 16. Inner hinge block; 17. Drive rod; 18. First connecting rod; 19. Outer hinge block; 20. Second connecting rod; 21. Push-pull groove; 22. Push-pull block; 23. Return spring; 24. Measuring probe; 25. Inner rod; 26. Inner spring; 27. Terminal block; 28. Measuring circuit; 29. ​​Winding roller; 30. Wire connector; 31. Protective cover; 32. Pull handle; 33. Shifting groove; 34. Pressure frame; 35. Shifting block; 36. Telescopic rod; 37. Telescopic spring; 38. Arc clamp. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Example 1

[0028] Please see Figures 1 to 3 A stable insulator resistance measuring device includes a placement frame, a base plate 1 at the bottom of the placement frame, a pad 2 fixedly disposed on the lower side of the base plate 1, and a support base 3 symmetrically disposed above the base plate 1. The support base 3 includes a pressure plate 4 and a housing 5. The housing 5 is fixedly disposed on the upper side of the pressure plate 4, and a placement groove 6 is disposed on the top of the housing 5. A measuring clamp 7 is snapped onto the side of the placement groove 6.

[0029] Furthermore, a displacement assembly is provided inside the base plate 1. The displacement assembly includes a groove 8 and a displacement screw 9. The groove 8 is located on the surface of the base plate 1. The displacement screw 9 is connected inside the groove 8 through a bearing. A sleeve 10 is provided at the bottom of each of the two support seats 3. Both sleeves 10 pass through the groove 8 and are screwed to the displacement screw 9.

[0030] Furthermore, the end of the displacement screw 9 penetrates the side of the base plate 1, and the end of the displacement screw 9 is provided with a handle 11, and the internal threads of the two sleeves 10 are in opposite directions.

[0031] When using this device, place it on a flat surface, ensuring the base plate feet 2 are fully in contact with the plane to prevent shaking during measurement. Adjust the spacing of the support seats 3 according to the specific model of the insulator to be measured. Rotate the handle 11 at the end of the displacement screw 9 to drive the sleeves 10 at the bottom of the two support seats 3 to move towards or away from each other along the groove 8, thereby moving the two support seats 3 closer or further apart. After adjusting to the target spacing, place the insulator horizontally into the placement groove 6 at the top of the support seat 3, with the hardware at both ends of the insulator in contact with the placement groove 6, and the measuring chuck 7 clamping the insulator hardware tightly. The measuring chuck 7 not only stabilizes the insulator but also performs resistance measurement. Example 2

[0032] Please see Figures 1 to 6 A stable insulator resistance measuring device includes a placement frame, a base plate 1 at the bottom of the placement frame, a pad 2 fixedly disposed on the lower side of the base plate 1, and a support base 3 symmetrically disposed above the base plate 1. The support base 3 includes a pressure plate 4 and a housing 5. The housing 5 is fixedly disposed on the upper side of the pressure plate 4, and a placement groove 6 is disposed on the top of the housing 5. A measuring clamp 7 is snapped onto the side of the placement groove 6.

[0033] Furthermore, a displacement assembly is provided inside the base plate 1. The displacement assembly includes a groove 8 and a displacement screw 9. The groove 8 is located on the surface of the base plate 1, and the displacement screw 9 is connected to the inside of the groove 8 via a bearing. A sleeve 10 is provided at the bottom of each of the two support seats 3, and both sleeves 10 pass through the groove 8 and are screwed to the displacement screw 9. Rotation of the displacement screw 9 can simultaneously drive the two sleeves 10 to move synchronously.

[0034] Furthermore, the end of the displacement screw 9 penetrates the side of the base plate 1, and a handle 11 is provided at the end of the displacement screw 9. The internal threads of the two sleeves 10 are in opposite directions. By rotating the displacement screw 9 with the handle 11, the reverse-threaded sleeves 10 at the bottom of the two support seats 3 are driven to move towards or in opposite directions, and the distance between the two support seats 3 can be quickly adjusted.

[0035] Furthermore, the support base 3 is provided with a clamping assembly, which includes a vertical rod 12 and a curved arm 13. The vertical rod 12 is fixedly disposed inside the housing 5, and the two curved arms 13 are symmetrically hinged to both sides of the housing 5 through external hinge blocks 19.

[0036] Furthermore, a straight cylinder 14 is movably sleeved on the outer side of the vertical rod 12. The upper end of the straight cylinder 14 passes through the placement groove 6. A support block 15 is provided on the top of the straight cylinder 14. Inner hinge blocks 16 are fixedly provided on both sides of the straight cylinder 14. A drive rod 17 is fixedly provided on the lower side of the curved arm 13. A first connecting rod 18 is hinged between the drive rod 17 and the inner hinge block 16. A second connecting rod 20 is hinged between the upper end of the curved arm 13 and the measuring clamp 7.

[0037] Furthermore, a push-pull groove 21 is provided on the top of the housing 5, and a push-pull block 22 is provided on the lower side of the measuring clamp 7. The push-pull groove 21 and the push-pull block 22 cooperate with each other. The push-pull block 22 moves inside the push-pull groove 21 to prevent the measuring clamp 7 from shifting position.

[0038] Furthermore, a return spring 23 is hinged between the bottoms of the two curved arms 13. The return spring 23 can cause the two measuring clamps 7 to separate from each other, facilitating the placement of the insulator.

[0039] Furthermore, a measuring probe 24 is provided in the middle of the measuring chuck 7. An inner rod 25 is movably disposed inside the measuring probe 24. An internal spring 26 is fixedly disposed between the inner end of the measuring probe 24 and the measuring chuck 7. A terminal post 27 is provided on the lower side of the inner rod 25. A winding roller 29 is movably disposed inside the housing 5. A measuring circuit 28 is wound around the outer side of the winding roller 29. The inner end of the measuring circuit 28 is connected to the terminal post 27, and a wire connector 30 is provided at the outer end of the measuring circuit 28. The measuring circuit 28 is wound around the winding roller 29 inside the housing 5 and automatically unwinds and rewinds as the measuring chuck 7 moves, avoiding external winding.

[0040] In another embodiment, the support base 3 is preferably structured such that the insulator is placed in the placement groove 6 at the top of the support base 3, ensuring that the insulator fittings are in contact with the support block 15. The stroke of the straight cylinder 14 along the vertical rod 12 is driven by the weight of the insulator. When the straight cylinder 14 slides down, the drive rod 17 on the lower side of the curved arm 13 is pulled by the first connecting rod 18, causing the curved arm 13 to rotate outward around the outer hinge block 19. The upper end of the curved arm 13 pushes the measuring chuck 7 towards the center through the second connecting rod 20 until the measuring probe 24 contacts the end face of the insulator. The push-pull groove 21 and the push-pull block 22 cooperate to ensure that the measuring chuck 7 moves horizontally, avoiding poor contact caused by tilting. The inner rod 25 of the measuring probe 24 is connected to the measuring chuck 7 through the internal spring 26, ensuring that the measuring probe 24 is in continuous contact with the end face of the insulator. When the measuring chuck 7 moves, the winding roller 29 automatically winds up and unwinds the measuring wire 28 through the internal spring, avoiding exposed winding. The plug connector 30 can be directly connected to a megohmmeter or a resistance tester. When the insulator is removed after measurement, the return spring 23 retracts, causing the bottom of the crank arm 13 to move closer together, which in turn causes the measuring clamp 7 to move away from each other and the support block 15 to rise automatically. Example 3

[0041] Please see Figures 1 to 7 A stable insulator resistance measuring device includes a placement frame, a base plate 1 at the bottom of the placement frame, a pad 2 fixedly disposed on the lower side of the base plate 1, and a support base 3 symmetrically disposed above the base plate 1. The support base 3 includes a pressure plate 4 and a housing 5. The housing 5 is fixedly disposed on the upper side of the pressure plate 4, and a placement groove 6 is disposed on the top of the housing 5. A measuring clamp 7 is snapped onto the side of the placement groove 6.

[0042] Furthermore, a displacement assembly is provided inside the base plate 1. The displacement assembly includes a groove 8 and a displacement screw 9. The groove 8 is located on the surface of the base plate 1, and the displacement screw 9 is connected to the inside of the groove 8 via a bearing. A sleeve 10 is provided at the bottom of each of the two support seats 3, and both sleeves 10 pass through the groove 8 and are screwed to the displacement screw 9. Rotation of the displacement screw 9 can simultaneously drive the two sleeves 10 to move synchronously.

[0043] Furthermore, the end of the displacement screw 9 penetrates the side of the base plate 1, and a handle 11 is provided at the end of the displacement screw 9. The internal threads of the two sleeves 10 are in opposite directions. By rotating the displacement screw 9 with the handle 11, the reverse-threaded sleeves 10 at the bottom of the two support seats 3 are driven to move towards or in opposite directions, and the distance between the two support seats 3 can be quickly adjusted.

[0044] Furthermore, the support base 3 is provided with a clamping assembly, which includes a vertical rod 12 and a curved arm 13. The vertical rod 12 is fixedly disposed inside the housing 5, and the two curved arms 13 are symmetrically hinged to both sides of the housing 5 through external hinge blocks 19.

[0045] Furthermore, a straight cylinder 14 is movably sleeved on the outer side of the vertical rod 12. The upper end of the straight cylinder 14 passes through the placement groove 6. A support block 15 is provided on the top of the straight cylinder 14. Inner hinge blocks 16 are fixedly provided on both sides of the straight cylinder 14. A drive rod 17 is fixedly provided on the lower side of the curved arm 13. A first connecting rod 18 is hinged between the drive rod 17 and the inner hinge block 16. A second connecting rod 20 is hinged between the upper end of the curved arm 13 and the measuring clamp 7.

[0046] Furthermore, a push-pull groove 21 is provided on the top of the housing 5, and a push-pull block 22 is provided on the lower side of the measuring clamp 7. The push-pull groove 21 and the push-pull block 22 cooperate with each other. The push-pull block 22 moves inside the push-pull groove 21 to prevent the measuring clamp 7 from shifting position.

[0047] Furthermore, a return spring 23 is hinged between the bottoms of the two curved arms 13. The return spring 23 can cause the two measuring clamps 7 to separate from each other, facilitating the placement of the insulator.

[0048] Furthermore, a measuring probe 24 is provided in the middle of the measuring chuck 7. An inner rod 25 is movably disposed inside the measuring probe 24. An internal spring 26 is fixedly disposed between the inner end of the measuring probe 24 and the measuring chuck 7. A terminal post 27 is provided on the lower side of the inner rod 25. A winding roller 29 is movably disposed inside the housing 5. A measuring circuit 28 is wound around the outer side of the winding roller 29. The inner end of the measuring circuit 28 is connected to the terminal post 27, and a wire connector 30 is provided at the outer end of the measuring circuit 28. The measuring circuit 28 is wound around the winding roller 29 inside the housing 5 and automatically unwinds and rewinds as the measuring chuck 7 moves, avoiding external winding.

[0049] Furthermore, a protective cover 31 is hinged above the base plate 1, and a handle 32 is fixedly installed on the outside of the protective cover 31.

[0050] Furthermore, the protective cover 31 has a sliding groove 33 inside, and a pressure frame 34 is movably disposed inside the sliding groove 33. The pressure frame 34 is engaged with the sliding groove 33 by a sliding block 35. A telescopic rod 36 is disposed inside the pressure frame 34, and a telescopic spring 37 is disposed between the telescopic rod 36 and the pressure frame 34. An arc-shaped clamp 38 is fixedly disposed at the bottom of the telescopic rod 36. The hinged protective cover 31 is opened and closed by a pull handle 32, and the telescopic rod 36 and the arc-shaped clamp 38 of the internal pressure frame 34 apply downward pressure to the top of the insulator.

[0051] In another embodiment, the protective cover 31 is preferably constructed such that, after the insulator is placed, the pressure frame 34 is moved to a suitable position along the sliding groove 33 via the moving block 35. Holding the handle 32 on the outside of the protective cover 31, the protective cover 31 is gently pulled downwards, causing it to rotate around the hinge axis of the base plate until the protective cover 31 is completely in contact with the base plate 1. When the protective cover 31 is closed, the arc-shaped clamp 38 at the bottom of the telescopic rod 36 automatically contacts the top of the insulator. The telescopic spring 37 automatically adjusts according to the height of the insulator, and the arc-shaped clamp 38 prevents damage to the sheds. Furthermore, a magnetic or snap-fit ​​structure can be provided between the protective cover 31 and the base plate 1 to provide connection stability.

[0052] This invention significantly improves the stability, adaptability, and environmental adaptability of insulator resistance measurement through the integrated optimization of mechanical structure and measurement system, and can be widely used.

Claims

1. A stable insulator resistance measuring device, comprising a mounting frame, characterized in that: The bottom of the placement rack is provided with a base plate, and a pad is fixedly provided on the lower side of the base plate. A support base is symmetrically provided on the upper side of the base plate. The support base includes a pressure plate and a housing. The housing is fixedly provided on the upper side of the pressure plate. A placement groove is provided on the top of the housing. A measuring clamp is snapped onto the side of the placement groove.

2. The stable insulator resistance measuring device as described in claim 1, characterized in that: The base plate is provided with a displacement assembly, which includes a groove and a displacement screw. The groove is located on the surface of the base plate, and the displacement screw is connected to the groove through a bearing. Both support seats are provided with sleeves at their bottoms, and both sleeves pass through the groove and are screwed to the displacement screw.

3. The stable insulator resistance measuring device as described in claim 2, characterized in that: The end of the displacement screw penetrates the side of the base plate, and the end of the displacement screw is provided with a handle. The internal threads of the two sleeves are in opposite directions.

4. The stable insulator resistance measuring device as described in claim 1, characterized in that: The support base is provided with a clamping assembly, which includes a vertical rod and two curved arms. The vertical rod is fixedly installed inside the housing, and the two curved arms are symmetrically hinged to both sides of the housing through external hinge blocks.

5. The stable insulator resistance measuring device as described in claim 4, characterized in that: A straight cylinder is movably sleeved on the outside of the vertical rod. The upper end of the straight cylinder passes through the placement groove. A support block is provided on the top of the straight cylinder. Inner hinge blocks are fixedly provided on both sides of the straight cylinder. A drive rod is fixedly provided on the lower side of the curved arm. A first connecting rod is hinged between the drive rod and the inner hinge block. A second connecting rod is hinged between the upper end of the curved arm and the measuring clamp.

6. The stable insulator resistance measuring device as described in claim 5, characterized in that: The top of the housing is provided with a push-pull groove, and the lower side of the measuring clamp is provided with a push-pull block. The push-pull groove and the push-pull block cooperate with each other.

7. The stable insulator resistance measuring device as described in claim 6, characterized in that: A return spring is hinged between the bottoms of the two crank arms.

8. The stable insulator resistance measuring device as described in claim 7, characterized in that: A measuring probe is provided in the middle of the measuring chuck, and an inner rod is movably provided inside the measuring probe. An internal spring is fixed between the inner end of the measuring probe and the measuring chuck. A terminal is provided on the lower side of the inner rod. A winding roller is movably provided inside the housing. A measuring circuit is wound around the outer side of the winding roller. The inner end of the measuring circuit is connected to the terminal, and a connector is provided at the outer end of the measuring circuit.

9. The stable insulator resistance measuring device as described in claim 1, characterized in that: A protective cover is hinged to the top of the base plate, and a handle is fixedly installed on the outside of the protective cover.

10. A stable insulator resistance measuring device as described in claim 9, characterized in that: The protective cover has a sliding groove inside, and a pressure frame is movably installed inside the sliding groove. The pressure frame is engaged with the sliding groove by a sliding block. A telescopic rod is installed inside the pressure frame, and a telescopic spring is installed between the telescopic rod and the pressure frame. An arc-shaped clamp is fixedly installed at the bottom of the telescopic rod.

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