A device for measuring the thickness of cable and wire insulation sheath

Abstract

This utility model relates to the field of thickness measurement technology and discloses a cable and wire insulation sheath thickness measuring device, including a measuring support cylinder. One end of the measuring support cylinder is respectively provided with a clamping assembly, an adjusting assembly, a measuring support assembly, and a scale rod. The clamping assembly includes several arc-shaped support plates arranged on the outer side of one end of the measuring support cylinder, and one end of each arc-shaped support plate is fixed with a first T-shaped rod that penetrates into the inner end of the measuring support cylinder. A first return spring is installed between one end of the first T-shaped rod and the inner wall of one end of the measuring support cylinder. Several sliding grooves are formed on the side wall of the middle part of the measuring support cylinder. This utility model, through the linkage of the clamping assembly and the adjusting assembly, can both internally support the tubular sheath and externally clamp the conductor structure. Therefore, when the measuring support assembly and the scale rod are used in combination, it can simultaneously detect the thickness of both semi-finished and finished cables, making it widely applicable.

Description

Technical Field

[0001] This utility model relates to the field of thickness measurement technology, specifically to a device for measuring the thickness of cable and wire insulation sheaths. Background Technology

[0002] The insulation sheath of cables and wires is a critical protective layer covering the outside of the conductor, primarily serving the dual functions of electrical insulation and mechanical protection. On the one hand, the insulation sheath needs to have sufficient thickness and uniformity to prevent voltage breakdown, ensure insulation resistance, and suppress partial discharge. On the other hand, the sheath thickness directly determines the cable's resistance to mechanical damage, environmental tolerance, and flame-retardant performance. Therefore, accurate measurement of the insulation sheath thickness is a necessary step to ensure the safe operation of cables, control production quality, and prevent shoddy workmanship.

[0003] In the existing technology, there are two main methods for measuring the thickness of cable insulation sheaths. One type is precision measuring instruments such as laser diameter gauges and X-ray thickness gauges, which have high measurement accuracy, but are expensive and complex to operate. They are mostly used in laboratories or for first-piece inspection in the early stages of production and are difficult to meet the needs of large-scale, real-time testing on the production site. The other type is contact measuring tools such as vernier calipers and micrometers, which are widely used on the production site. Although these tools are low in cost and easy to operate, the two plane measuring jaws of the caliper are in line contact with the arc surface of the cable. During measurement, the arc structure can easily introduce significant errors due to alignment deviations, resulting in poor repeatability of the measurement results.

[0004] This situation reflects current technological bottlenecks: precision instruments struggle to balance high accuracy with low cost and fast-paced online testing, while traditional calipers are limited by curved surfaces, only able to acquire single-point thickness data, providing limited feedback. Therefore, there is an urgent need for a cable insulation sheath thickness measuring device that balances field applicability, economy, and measurement accuracy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cable and wire insulation sheath thickness measuring device, which solves the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a cable and wire insulation sheath thickness measuring device, comprising a measuring cylinder, one end of which is respectively provided with a clamping assembly, an adjusting assembly, a measuring support assembly, and a scale rod. The clamping assembly includes a plurality of arc-shaped support plates arranged on the outer side of one end of the measuring cylinder, and one end of each arc-shaped support plate is fixed with a first T-shaped rod that penetrates into one end of the measuring cylinder. A first return spring is installed between one end of the first T-shaped rod and the inner wall of one end of the measuring cylinder. The side wall of the middle part of the measuring cylinder is provided with a plurality of sliding grooves. The adjusting assembly includes a clamping assembly for measuring... The measuring support cylinder contains a second T-shaped rod and an internally threaded cylinder. A third return spring is installed between one end of the second T-shaped rod and the inner wall of the other end of the measuring support cylinder. Several sliding grooves are fitted with sliders fixed to the surface of one end of the second T-shaped rod. The surface of the middle part of the measuring support cylinder is provided with an external thread that is threaded to the internally threaded cylinder. During the meshing and movement of the internally threaded cylinder, it applies pressure to several sliders simultaneously, causing the second T-shaped rod to press against or move away from the arc-shaped support plate. The measuring support assembly is mounted on the outside of one end of the measuring support cylinder through a bearing, and one end of the scale rod is engaged with one side of the top of the measuring support assembly.

[0007] Preferably, the measuring support assembly includes a support plate, a base, a Z-shaped support plate, an inverted U-shaped rod, and a second return spring. The bearing is fitted between the inner side of the support plate and one end of the measuring support cylinder, and the base is fixed to the top of the support plate. One side of the Z-shaped support plate is installed on the top of the base. One end of the inverted U-shaped rod is engaged with the middle structure of the Z-shaped support plate, and the second return spring is installed between one end of the inverted U-shaped rod and the inner wall of the middle part of the Z-shaped support plate. The other end of the inverted U-shaped rod is fixed to the top of the scale rod, and one end of the scale rod is engaged with the other side of the Z-shaped support plate. After a single measurement, the scale rod automatically resets under the combined traction of the inverted U-shaped rod and the second return spring.

[0008] Preferably, the inner walls of the arc-shaped support plates are provided with a slope structure, and the arc-shaped support plates are arranged in a circular array with the central axis of the measuring support cylinder as the reference.

[0009] Preferably, the surface of the scale rod is provided with scale lines, and the end of the scale rod near the arc-shaped support plate is provided with a spherical structure.

[0010] Preferably, one side of the Z-shaped support plate is slidably mounted on the top of the base, and a through-shaped slide rail groove is provided in one side of the Z-shaped support plate. A slide rail body fixed to the top of the base is engaged in one end of the slide rail groove, and an auxiliary screw extending to the top of one side of the Z-shaped support plate is fixed on the top of the slide rail body. A limiting nut for pressing and limiting the connection between the base and the Z-shaped support plate is threaded onto the surface of the auxiliary screw.

[0011] Preferably, one end of the scale rod is provided with an auxiliary marking groove, and both the front and rear ends of the support plate are provided with a pressure-reducing structure. The output structure of the pressure-reducing structure can press and limit the corresponding arc-shaped support plate.

[0012] Preferably, the super-pressure structure includes an L-shaped support plate and a positioning screw, with one side of the L-shaped support plate fixed to the surface of the support plate, and one end of the positioning screw being threadedly connected to the inside of the other end of the L-shaped support plate as the output structure of the super-pressure structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through the linkage of the clamping component and the adjustment component, can both support the tubular sheath internally and clamp the conductor structure externally. Thus, when the measuring support component and the scale rod are combined, it can take into account the thickness detection of both semi-finished and finished cables, and has a wide range of applications.

[0015] 2. The scale rod of this utility model uses its own spherical structure to form point contact with the surface being measured, eliminating the alignment deviation caused by the line contact of the arc surface of traditional calipers, thus improving the single-point measurement accuracy in principle.

[0016] 3. The measuring support assembly of this utility model, with its internal support plate supported by corresponding bearings and measuring cylinder, enables the scale rod to perform multi-point measurements along the circumference of the measured part. By collecting the differences at multiple locations and taking the average value, the problem of single-point distortion is effectively avoided, and the final thickness data is more representative and accurate.

[0017] 4. The adjustment component of this utility model is linked with the slider and the second T-shaped rod by a single rotation of the internal threaded cylinder, so that the second T-shaped rod can simultaneously press or move multiple arc-shaped support plates, realizing quick centering clamping or loosening. The operation is extremely convenient. In addition, the added double-pressure structure can lock the clamping parts a second time, which enhances the clamping stability and prevents the measured parts from loosening during the measurement process.

[0018] 5. The measuring device provided by this utility model adopts a purely mechanical structure without complex sensing elements, which is low in cost and highly durable. It is suitable for rapid batch testing on the production site. The auxiliary marking groove set on the scale rod can intuitively reflect the surface undulation of the sheath when rotating, which meets the conditions required for synchronous evaluation of roundness and provides rich feedback information. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a left-side view of the structure of this utility model;

[0022] Figure 4 This is a right-side view of the structure of this utility model;

[0023] Figure 5 The structure of this utility model Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a schematic diagram of the inner clamping of the arc-shaped support plate of this utility model.

[0025] Figure 7 This is a schematic diagram of the external clamping of the arc-shaped support plate of this utility model.

[0026] Figure 8 The structure of this utility model Figure 7 Enlarged diagram of point B in the middle.

[0027] In the diagram: 1. Measuring support cylinder; 2. Arc-shaped support plate; 3. First T-shaped rod; 4. First return spring; 5. Second T-shaped rod; 6. Slide groove; 7. Slider; 8. Internal threaded cylinder; 9. Support plate; 10. Base; 11. Z-shaped support plate; 12. Inverted U-shaped rod; 13. Second return spring; 14. Scale rod; 15. Slide rail groove; 16. Slide rail body; 17. Auxiliary screw; 18. Limit nut; 19. L-shaped support plate; 20. Positioning screw; 21. Sheath body; 22. Cable connector; 23. Auxiliary marking groove; 24. Third return spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-8A cable and wire insulation sheath thickness measuring device includes a measuring support cylinder 1. One end of the measuring support cylinder 1 is respectively provided with a clamping assembly, an adjusting assembly, a measuring support assembly, and a scale rod 14. The clamping assembly includes a plurality of arc-shaped support plates 2 arranged on the outer side of one end of the measuring support cylinder 1. The inner walls of the plurality of arc-shaped support plates 2 are all provided with a slope structure. The plurality of arc-shaped support plates 2 are arranged in a circular array with the central axis of the measuring support cylinder 1 as a reference, providing structural conditions for subsequent synchronous movement. One end of the arc-shaped support plate 2 is fixed with a first T-shaped rod 3 that is snapped through and penetrates into one end of the measuring support cylinder 1. A first return spring 4 is installed between one end of the first T-shaped rod 3 and the inner wall of one end of the measuring support cylinder 1.

[0030] The side wall of the middle section of the measuring support cylinder 1 is provided with several sliding grooves 6. The adjustment assembly includes a second T-shaped rod 5 and an internal threaded cylinder 8 that are snapped into the middle section of the measuring support cylinder 1. A third return spring 24 is installed between one end of the second T-shaped rod 5 and the inner wall of the other end of the measuring support cylinder 1. Each of the several sliding grooves 6 is snapped into a slider 7 that is fixed to one end surface of the second T-shaped rod 5. The surface of the middle section of the measuring support cylinder 1 is provided with an external thread that is threadedly connected to the internal threaded cylinder 8. During the meshing and movement of the internal threaded cylinder 8, it applies pressure to the several sliders 7 simultaneously, so that the second T-shaped rod 5 presses against or moves away from the arc-shaped support plate 2. The measuring support assembly is mounted on the outside of one end of the measuring support cylinder 1 through a bearing, and one end of the scale rod 14 is snapped into one side of the top of the measuring support assembly.

[0031] The measuring support assembly includes a support plate 9, a base 10, a Z-shaped support plate 11, an inverted U-shaped rod 12, and a second return spring 13. A bearing is fitted between the inner side of the support plate 9 and one end of the measuring support cylinder 1, thus ensuring connection strength while allowing the support plate 9 to rotate its associated structure to meet different usage requirements. The base 10 is fixed to the top of the support plate 9, one side of the Z-shaped support plate 11 is mounted on the top of the base 10, one end of the inverted U-shaped rod 12 is engaged with the middle structure of the Z-shaped support plate 11, and the second return spring 13 is mounted on the inverted U-shaped rod 12. One end of the U-shaped rod 12 is between the inner wall of the middle part of the Z-shaped support plate 11, and the other end of the U-shaped rod 12 is fixed to the top of the scale rod 14. One end of the scale rod 14 is snapped through the other side of the Z-shaped support plate 11. After a single measurement, the scale rod 14 is automatically reset under the combined traction of the U-shaped rod 12 and the second reset spring 13, which not only optimizes the user experience but also improves the detection efficiency. The surface of the scale rod 14 is provided with scale lines, and the end of the scale rod 14 near the arc-shaped support plate 2 is set with a spherical structure to perform point and line contact detection, thereby improving the accuracy of the detection data.

[0032] One side of the Z-shaped support plate 11 is slidably mounted on the top of the base 10, and a through-shaped slide rail groove 15 is provided in one side of the Z-shaped support plate 11. A slide rail body 16 fixed to the top of the base 10 is snapped into one end of the slide rail groove 15, and an auxiliary screw 17 extending to the outside of the top of one side of the Z-shaped support plate 11 is fixed to the top of the slide rail body 16. A limiting nut 18 for pressing and limiting the connection between the base 10 and the Z-shaped support plate 11 is threaded onto the surface of the auxiliary screw 17.

[0033] An auxiliary marking groove 23 is provided at one end of the scale rod 14, and a double-pressure structure is provided at both the front and rear ends of the support plate 9. The output structure of the double-pressure structure can press and limit the corresponding arc-shaped support plate 2. The double-pressure structure includes an L-shaped support plate 19 and a positioning screw 20. One side of the L-shaped support plate 19 is fixed on the surface of the support plate 9, and one end of the positioning screw 20 is threadedly connected to the inside of the other end of the L-shaped support plate 19 as the output structure of the double-pressure structure.

[0034] In use, the thickness of the sheath body 21 that has not yet been combined for use or the cable joint 22 equipped with the insulating sheath is detected. The sheath body 21 is the insulating sheath of the cable wire to be tested, and the cable joint 22 is the cable end equipped with the insulating sheath. The following is an explanation through two specific embodiments.

[0035] Example 1

[0036] S1. Lift the scale rod 14 to make room, then fit several arc-shaped support plates 2 into the inside of the sheath body 21 and move and adjust them until the outer surface of the sheath body 21 fits into the spherical structure of the scale rod 14.

[0037] S2. Tighten the internal threaded cylinder 8 to press against several sliders 7 simultaneously. Then, several sliders 7 drive the second T-shaped rod 5 to move synchronously. The second T-shaped rod 5 in the moving state will press against several arc-shaped support plates 2 synchronously until the outer surfaces of several arc-shaped support plates 2 are all in contact with the inner wall of the sheath body 21, and the sheath body 21 cannot easily separate from the arc-shaped support plates 2.

[0038] S3. Tighten the limiting nut 18 to temporarily move it away from the surface of one side of the Z-shaped support plate 11. Move the Z-shaped support plate 11 until the scale rod 14 is above the unused structural surface of the corresponding arc-shaped support plate 2. Press the scale rod 14 to make the scale rod 14 drive the inverted U-shaped rod 12 to move synchronously until the spherical structure inside the scale rod 14 is in contact with the outer surface of the corresponding arc-shaped support plate 2. Using the horizontal plane at the top of the other side of the Z-shaped support plate 11 as the baseline, record the corresponding data value on the surface of the scale rod 14 at this time and use it as the baseline value.

[0039] S4. Reset the Z-shaped support plate 11 and the limiting nut 18. The spherical structure inside the scale rod 14 re-fits the surface of the sheath body 21. Similarly, taking the horizontal plane at the top of the other side of the Z-shaped support plate 11 as the baseline, record the corresponding data value on the surface of the scale rod 14 at this time and use it as the first measurement value. Subtract the first measurement value from the baseline value to obtain the first difference value, which is the thickness value of the sheath body 21 after approximate measurement.

[0040] S5. Considering the reality that single-position detection is prone to distortion, the support plate 9 is turned. Under the support of the corresponding bearing, the support plate 9 can drive the base 10, Z-shaped support plate 11, scale rod 14 and other structures to rotate intermittently at multiple angles around the circumference of the sheath body 21. After rotating at multiple angles, the second measurement value, the third measurement value and so on up to the Nth measurement value can be obtained. Subtract the reference value in turn to obtain the second difference value, the third difference value and so on up to the Nth difference value. Finally, the average value of all the differences is calculated. The final average value is the more accurate thickness value of the sheath body 21.

[0041] S6. Based on multi-point measurements around the sheath body 21, the roundness of the sheath body 21 can be preliminarily detected by observing the undulation of the auxiliary marking groove 23. The distance from the auxiliary marking groove 23 to the side completely submerged in the Z-shaped support plate 11 is taken as the acceptable error range.

[0042] Rotate the support plate 9 at low speed so that the scale rod 14 rotates concentrically along the surface of the sheath body 21 with the cooperation of the Z-shaped support plate 11, the inverted U-shaped rod 12 and the second return spring 13. Observe the movement of the auxiliary marking groove 23 with the scale rod 14. If the auxiliary marking groove 23 enters the interior of one side of the Z-shaped support plate 11 when the scale rod 14 passes through a certain area of ​​the sheath body 21, it indicates that the roundness of the sheath body 21 itself is poor and needs to be adjusted at the production end. If the auxiliary marking groove 23 does not enter the interior of one side of the Z-shaped support plate 11 during the rotation of the scale rod 14, it indicates that the roundness of the sheath body 21 is qualified.

[0043] Example 2

[0044] S1. Tighten the internal threaded cylinder 8 to release its pressure on several sliders 7. Then, several sliders 7 and the second T-shaped rod 5 retract under the reset force of the third reset spring 24, so that the second T-shaped rod 5 moves away from the arc-shaped support plate 2, thus making room.

[0045] S2. Remove the insulation sheath from one end of the cable connector 22 to expose the internal conductor structure. Fit the conductor structure inside several arc-shaped support plates 2. Under the elastic pressure of their respective first T-shaped rods 3, the inner walls of the several arc-shaped support plates 2 are in contact with the surface of the conductor structure at one end of the cable connector 22.

[0046] S3. Tighten the positioning screw 20 to rotate and move under the support of the corresponding L-shaped support plate 19 until one end of the positioning screw 20 presses against its corresponding arc-shaped support plate 2, thereby increasing the connection strength between the arc-shaped support plate 2 and the conductor structure at one end of the cable connector 22. The two arc-shaped support plates 2, which are in front and behind each other, will also stably clamp the conductor structure at one end of the cable connector 22 under the pressing transmission of their respective positioning screws 20.

[0047] S4. Tighten the limit nut 18 to make room, move the Z-shaped support plate 11 until the scale rod 14 is above the conductor structure, press the scale rod 14 to make the scale rod 14 drive the inverted U-shaped rod 12 to move synchronously until the spherical structure inside the scale rod 14 is in contact with the outer surface of the conductor structure. Using the horizontal plane at the top of the other side of the Z-shaped support plate 11 as the baseline, record the corresponding data value on the surface of the scale rod 14 at this time and use it as the baseline value.

[0048] S4. Move the Z-shaped support plate 11 so that the spherical structure inside the scale rod 14 fits against the outermost surface of the cable connector 22. Reset the limit nut 18 to limit the movement. Similarly, using the horizontal plane at the top of the other side of the Z-shaped support plate 11 as the baseline, record the corresponding data value on the surface of the scale rod 14 at this time and use it as the first measurement value. Subtract the first measurement value from the baseline value to obtain the first difference, which is the approximate thickness value of the cable connector 22 after measurement.

[0049] S5. Considering the reality that single-position detection is prone to distortion, the support plate 9 is turned. Under the support of the corresponding bearing, the support plate 9 can drive the base 10, Z-shaped support plate 11, scale rod 14 and other structures to rotate intermittently at multiple angles around the circumference of the cable joint 22. After rotating at multiple angles, the second measurement value, the third measurement value and so on up to the Nth measurement value can be obtained. Subtract the reference value in turn to obtain the second difference value, the third difference value and so on up to the Nth difference value. Finally, the average value of all the differences is calculated. The final average value is the more accurate thickness value of the cable joint 22.

[0050] S6. Based on multi-point measurements around the cable joint 22, the roundness of the cable joint 22 can be preliminarily detected by observing the undulation of the auxiliary marking groove 23. The distance from the auxiliary marking groove 23 to the side completely submerged in the Z-shaped support plate 11 is taken as the acceptable error range.

[0051] Rotate the support plate 9 at low speed so that the scale rod 14 rotates concentrically along the surface of the cable connector 22 with the cooperation of the Z-shaped support plate 11, the inverted U-shaped rod 12 and the second return spring 13. Observe the movement of the auxiliary marking groove 23 with the scale rod 14. If the auxiliary marking groove 23 enters the interior of one side of the Z-shaped support plate 11 when the scale rod 14 passes through a certain area of ​​the cable connector 22, it indicates that the roundness of the cable connector 22 itself is poor and needs to be adjusted at the production end. If the auxiliary marking groove 23 never enters the interior of one side of the Z-shaped support plate 11 during the rotation of the scale rod 14, it indicates that the roundness of the cable connector 22 is qualified.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the thickness of cable and wire insulation sheath, comprising a measuring support cylinder (1), characterized in that: One end of the measuring support cylinder (1) is respectively provided with a clamping assembly, an adjusting assembly, a measuring support assembly and a scale rod (14). The clamping assembly includes several arc-shaped support plates (2) arranged on the outer side of one end of the measuring support cylinder (1), and one end of the arc-shaped support plate (2) is fixed with a first T-shaped rod (3) that is snapped through and penetrates into one end of the measuring support cylinder (1). A first return spring (4) is installed between one end of the first T-shaped rod (3) and the inner wall of one end of the measuring support cylinder (1). Several sliding grooves (6) are opened on the side wall of the middle part of the measuring support cylinder (1). The adjusting assembly includes a second T-shaped rod (5) snapped into the middle part of the measuring support cylinder (1) and an internal threaded cylinder (8). A third return spring (24) is installed between one end of the second T-shaped rod (5) and the inner wall of the other end of the measuring support cylinder (1). A slider (7) fixed on one end surface of the second T-shaped rod (5) is engaged in the interior of several of the sliding grooves (6). An external thread is opened on the surface of the middle part of the measuring support cylinder (1) and is threaded to the internal thread cylinder (8). During the meshing and movement, the internal thread cylinder (8) applies pressure to several sliders (7) simultaneously, so that the second T-shaped rod (5) presses against or moves away from the arc-shaped support plate (2). The measuring support assembly is mounted on the outside of one end of the measuring support cylinder (1) through a bearing, and one end of the scale rod (14) is engaged through one side of the top of the measuring support assembly.

2. The cable and wire insulation sheath thickness measuring device according to claim 1, characterized in that: The measuring support assembly includes a support plate (9), a base (10), a Z-shaped support plate (11), an inverted U-shaped rod (12), and a second return spring (13). The bearing is fitted between the inner side of the support plate (9) and one end of the measuring support cylinder (1), and the base (10) is fixed on the top of the support plate (9). One side of the Z-shaped support plate (11) is installed on the top of the base (10). One end of the inverted U-shaped rod (12) is engaged with the middle structure of the Z-shaped support plate (11), and the second return spring (13) is installed between one end of the inverted U-shaped rod (12) and the inner wall of the middle part of the Z-shaped support plate (11). The other end of the inverted U-shaped rod (12) is fixed on the top of the scale rod (14), and one end of the scale rod (14) is engaged with the other side of the Z-shaped support plate (11). After a single measurement, the scale rod (14) is automatically reset under the combined traction of the inverted U-shaped rod (12) and the second return spring (13).

3. The cable and wire insulation sheath thickness measuring device according to claim 1, characterized in that: The inner walls of several of the arc-shaped support plates (2) are provided with a slope structure, and the several arc-shaped support plates (2) are arranged in a circular array with the central axis of the measuring support cylinder (1) as the reference.

4. The cable and wire insulation sheath thickness measuring device according to claim 1, characterized in that: The surface of the scale rod (14) is provided with scale lines, and the end of the scale rod (14) near the arc-shaped support plate (2) is provided with a spherical structure.

5. The cable and wire insulation sheath thickness measuring device according to claim 2, characterized in that: One side of the Z-shaped support plate (11) is slidably mounted on the top of the base (10), and a through-shaped slide rail groove (15) is provided in one side of the Z-shaped support plate (11). A slide rail body (16) fixed to the top of the base (10) is snapped into one end of the slide rail groove (15), and an auxiliary screw (17) extending to the top of one side of the Z-shaped support plate (11) is fixed to the top of the slide rail body (16). A limiting nut (18) for pressing and limiting the connection between the base (10) and the Z-shaped support plate (11) is threaded onto the surface of the auxiliary screw (17).

6. The cable and wire insulation sheath thickness measuring device according to claim 2, characterized in that: One end of the scale rod (14) is provided with an auxiliary marking groove (23), and the front and rear ends of the support plate (9) are provided with a pressure structure. The output structure of the pressure structure can press and limit the corresponding arc-shaped support plate (2).

7. The cable and wire insulation sheath thickness measuring device according to claim 6, characterized in that: The pressure-reinforcing structure includes an L-shaped support plate (19) and a positioning screw (20). One side of the L-shaped support plate (19) is fixed on the surface of the support plate (9), and one end of the positioning screw (20) is threadedly connected to the other end of the L-shaped support plate (19) as the output structure of the pressure-reinforcing structure.

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