A cable diameter measuring device

Abstract

This invention claims protection for a cable diameter measuring device, comprising a telescopic hand rod, a connecting plate, an upper clamping plate, a lower clamping plate, an operating assembly, a telescopic control component, and a distance sensor. The connecting plate is disposed at one end of the telescopic hand rod, which is used to adjust the extension length of the connecting plate. The upper clamping plate is slidably connected to the connecting plate, and the lower clamping plate is fixedly connected to the connecting plate. The telescopic control component is disposed on the lower clamping plate, and its control end is connected to the upper clamping plate. The telescopic control component is used to control the upper clamping plate to move closer to or away from the lower clamping plate. The distance sensor is disposed on both the upper and lower clamping plates and is used to measure the distance between the upper and lower clamping plates. The cable diameter measuring device of this application has an adjustable length, and the telescopic hand rod is made of insulating material, allowing users to safely measure cable diameter remotely and avoiding accidents.

Description

Technical Field

[0001] This invention relates to the field of diameter measuring instruments, and more specifically, to a cable diameter measuring device. Background Technology

[0002] With the rapid development of cities, power cables, as a major mode of power transmission and distribution, are playing an increasingly important role in urban power grids. Power cables are crucial carriers for transmitting and distributing electrical energy and have been widely used in the power industry. In distribution networks, power cables are classified by voltage level: 1kV cables are used in 220 / 380V low-voltage systems, while cables with voltage levels of 6-35kV are called medium-voltage cables. Power cables in distribution networks can be laid underground (direct burial, ductwork) or in the air (trenches, tunnels, shafts, cable trays, and cable trays in basements).

[0003] Currently, the power distribution network involves substation renovation projects, which modify existing cabinets. These projects include fabricating cable terminations based on the original cable cross-section, configuring cable accessories for various equipment, and installing copper connecting pipes that require the original cable cross-sectional diameter. However, in actual surveys, several challenges arise. First, the existing 10kV cables have been in operation for a long time, resulting in a significant accumulation of dust on their surfaces. Surveyors must climb down cable trench supports, wear gloves, wipe away the dust, and then search for the cross-sectional markings along the cable's front and back, sometimes finding them difficult or impossible to locate. Second, some cables inside the substation are coated with fire-retardant paint. Third, 0.4kV cables often lack on-site labels. Surveyors typically need to know the low-voltage cable cross-sectional area by opening the back door of the low-voltage cabinet, using probes, and following the light from a flashlight to find the markings on the low-voltage terminals. This significantly increases the difficulty of measuring the cable cross-sectional diameter and poses numerous safety hazards.

[0004] Traditional methods for measuring cable cross-sectional diameter include: 1. Directly measuring the cable diameter using vernier calipers and then referring to a cable sample for the cross-sectional area. 2. Measuring the cable circumference with a flexible ruler, calculating the diameter using the law of circumference C, and then referring to a cable sample for the cross-sectional area. However, these methods require close contact with the cable, which is inconvenient for measuring cables located deep within or at higher elevations.

[0005] Therefore, how to measure the diameter of a cable over a long distance is the technical problem that this application aims to solve. Summary of the Invention

[0006] To address the shortcomings of existing technologies, a cable diameter measuring device is provided, which can be extended to measure the cross-sectional diameter of a cable from a distance.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] A cable diameter measuring device includes a telescopic hand handle, a connecting plate, an upper clamping plate, a lower clamping plate, an operating component, a telescopic control component, and a distance measuring sensor.

[0009] A connecting plate is located at one end of the telescopic hand lever, which is used to adjust the length of the connecting plate.

[0010] The upper clamping plate is slidably connected to the connecting plate, and the lower clamping plate is fixedly connected to the connecting plate. The telescopic control component is set on the lower clamping plate, and the control end of the telescopic control component is connected to the upper clamping plate. The telescopic control component is used to control the upper clamping plate to move closer to the lower clamping plate or to control the upper clamping plate to move away from the lower clamping plate. The distance measuring sensor is set on the upper and lower clamping plates and is used to measure the distance between the upper and lower clamping plates.

[0011] The operating component is located at the end of the telescopic hand lever away from the connecting plate. The operating component is coupled to the telescopic control component and the distance sensor respectively, and is used to control the extension and retraction of the telescopic control key, as well as to display the distance measurement result of the distance sensor.

[0012] In summary, the above technical solution has the following beneficial effects: the telescopic hand lever allows the connecting plate to extend to the cable at a distance; the user can control the upper and lower clamps at the other end to clamp or separate via an operating component at one end, thereby clamping the cable radially. The distance between the upper and lower clamps after clamping the cable is the radial distance of the cable at a certain angle. By measuring multiple angles, the diameter of the cable coated with fire-retardant paint can be obtained. The cable diameter measuring device of this application has an adjustable length, and the telescopic hand lever is made of insulating material, allowing the user to safely measure the cable diameter remotely, avoiding accidents. Attached Figure Description

[0013] Figure 1 A schematic diagram of a telescopic handheld lever for a cable diameter measuring device;

[0014] Figure 2 A schematic diagram showing the connection of the operating components of a cable diameter measuring device;

[0015] Figure 3 This is an exploded view of the upper and lower clamping plates of a cable diameter measuring device.

[0016] Figure 4 A schematic cross-sectional view of the first upper clamping plate of a cable diameter measuring device;

[0017] Figure 5 A schematic cross-sectional view of the second upper clamping plate of a cable diameter measuring device;

[0018] Figure 6 A schematic cross-sectional view of the first lower clamping plate of a cable diameter measuring device;

[0019] Figure 7 A schematic cross-sectional view of the second lower clamping plate of a cable diameter measuring device;

[0020] Figure 8 This is an exploded view of the upper and lower auxiliary clamps of a cable diameter measuring device.

[0021] Figure 9 This is a schematic cross-sectional view of the upper clamping plate of a cable diameter measuring device;

[0022] Figure 10 This is a schematic diagram of the first usage state of a cable diameter measuring device;

[0023] Figure 11 This is a schematic diagram of the second usage state of a cable diameter measuring device;

[0024] Figure 12 A schematic diagram of a support rod for a cable diameter measuring device;

[0025] Figure 13 A schematic diagram of a support groove for a cable diameter measuring device;

[0026] Figure 14 This is a schematic diagram of the protective cover locking mechanism of a cable diameter measuring device.

[0027] Reference numerals: 10. Telescopic hand handle; 11. Hand grip; 12. Primary rod; 121. Support ring; 13. Secondary rod; 20. Connecting plate; 30. Upper clamping plate; 31. Upper opening; 311. Upper inner wall; 312. Upper sliding groove; 313. Upper elastic groove; 32. Upper auxiliary clamping plate; 321. Upper slider; 322. Upper through-hole; 323. Upper parallel sliding groove; 324. Upper force-bearing block; 40. Lower clamping plate; 41. Lower opening; 411. Lower inner wall; 412. Lower rotating hole; 42. 421. Lower auxiliary clamping plate; 422. Lower rotating block; 43. Lower through hole; 51. Mounting hole; 52. Operating component; 52. Telescopic control component; 521. Telescopic cylinder; 522. Telescopic rod; 53. Distance sensor; 54. Secondary control component; 541. Motor; 542. Elastic component; 60. Parallel component; 61. Upper parallel block; 611. Upper parallel slider; 62. Lower parallel block; 71. Support rod; 711. Straight part; 712. Bending part; 7121. Support groove; 72. Protective cover. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] like Figures 1-3 As shown, a cable diameter measuring device includes a telescopic hand rod 10, a connecting plate 20, an upper clamping plate 30, a lower clamping plate 40, an operating component 51, a telescopic control component 52, and a distance sensor 53. The connecting plate 20 is disposed at one end of the telescopic hand rod 10, which is used to adjust the extension length of the connecting plate 20. The upper clamping plate 30 is slidably connected to the connecting plate 20, and the lower clamping plate 40 is fixedly connected to the connecting plate 20. The telescopic control component 52 is disposed on the lower clamping plate 40, and the control end of the telescopic control component 52 is connected to the upper clamping plate 30. The telescopic control component 52 is used to control the upper clamping plate 30 to move closer to or further away from the lower clamping plate 40. A distance sensor 53 is mounted on both the upper and lower clamping plates 30 and 40 to measure the distance between them. An operating component 51 is located at the end of the telescopic hand lever 10 away from the connecting plate 20. The operating component 51 is coupled to both the telescopic control component 52 and the distance sensor 53, and is used to control the extension and retraction of the telescopic control key and to display the distance measurement result from the distance sensor 53. The telescopic hand lever 10 allows the connecting plate 20 to extend to a distant cable. The user can control the upper clamping plate 30 and lower clamping plate 40 at the other end to clamp or separate them using the operating component 51 at one end, thereby radially clamping the cable. The distance between the upper clamping plate 30 and lower clamping plate 40 after clamping the cable is the radial distance of the cable at a certain angle. By measuring the angle multiple times, the diameter of the fire-retardant coated cable can be obtained. The cable diameter measuring device of this application has an adjustable length, and the telescopic hand rod 10 is made of insulating material, allowing users to safely measure the cable diameter remotely and avoiding accidents.

[0030] like Figures 4-7As shown, the upper clamping plate 30 has an upper opening 31 at the end away from the connecting plate 20. The upper opening 31 extends through the upper clamping plate 30 along the sliding direction of the upper clamping plate 30, forming two opposing upper inner walls 311 on the upper clamping plate 30. Both upper inner walls 311 have upper sliding grooves 312 communicating with the upper opening 31. The upper sliding grooves 312 extend along the upper inner walls 311, and the direction of extension is perpendicular to the sliding direction of the upper clamping plate 30. An upper auxiliary clamping plate 32 is provided inside the upper opening 31. Upper sliding blocks 321, cylindrical in shape, are provided on both sides of the upper auxiliary clamping plate 32, which are movably connected to the upper sliding grooves 312. The lower clamping plate 40 has a lower opening 41 at the end away from the connecting plate 20. The lower opening 41 extends through the upper clamping plate 30 along the sliding direction of the upper clamping plate 30, forming two opposing lower inner walls 411 on the lower clamping plate 40. Both lower inner walls 411 have upper sliding grooves 312 communicating with the upper opening 31. The system includes a lower rotating hole 412 communicating with the lower opening 41; a lower auxiliary clamping plate 42 is provided inside the lower opening 41, and lower rotating blocks 421 rotatably connected to the lower rotating hole 412 are provided on both sides of the lower auxiliary clamping plate 42; a distance measuring sensor 53 is provided on the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42; a parallel member 60 is also included, one end of which is perpendicularly connected to the lower auxiliary clamping plate 42, and the other end is perpendicularly connected to the upper auxiliary clamping plate 32, for keeping the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42 parallel, the parallel member 60 is telescopic, for adjusting the distance between the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42, and the parallel member 60 is slidable with the upper auxiliary clamping plate 32; a secondary control component 54 is also included, coupled to the operating component 51, the secondary control component 54 is connected to the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42 respectively, for controlling the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42 to clamp the cable at different angles. Because the upper slider 321 is cylindrical, it can slide along the upper slide groove 312 and rotate within the upper slide groove 312. The lower slider 321 can only rotate within the lower rotating hole 412. Since the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42 are connected by the parallel member 60, when the auxiliary control component 54 controls the lower auxiliary clamping plate 42 to rotate, the upper auxiliary clamping plate 32 will also rotate while remaining parallel to the lower auxiliary clamping plate 42. Since the parallel member 60 is telescopic, the upper auxiliary clamping plate 32 can also slide along the upper slide groove 312. Because cables are deformed due to compression during transportation or use, their cross-sections are not perfectly circular. Therefore, measuring the cross-sectional diameter of a cable at only one angle is unreliable. The hinged connection between the connecting plate 20 and the telescopic hand handle 10 in this application is designed to measure the cross-sectional diameter of the cable from multiple angles. However, adjusting the angle of the connecting plate 20 multiple times is still inconvenient. Therefore, after the upper clamping plate 30 and the lower clamping plate 40 clamp the cable, the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42 are controlled to rotate to clamp the cable from other angles, thus allowing the cross-sectional diameter of the cable to be measured at different angles.

[0031] The upper auxiliary clamp 32 has the same width and height as the upper opening 31, but its length can be different. The lower auxiliary clamp 42 has the same width and height as the lower opening 41, but its length can be different. Before use, the upper auxiliary clamp 32 and the lower auxiliary clamp 42 are respectively positioned under the upper opening 31 and the lower opening 41, with the parallel member 60 perpendicular to the upper clamp 30 and the lower clamp 40. During use, the upper clamp 30 and the lower clamp 40 first clamp the cable. At this time, the distance sensor 53 can measure the cable cross-sectional diameter at the starting angle. Then, the upper clamp 30 and the lower clamp 40 always maintain the state of clamping the cable to ensure that the cable does not rotate. The upper auxiliary clamp 32 and the lower auxiliary clamp 42 are controlled to rotate, and the cross-sectional diameter of the cable is measured from different angles. The distance sensor 53 transmits the cable cross-sectional width to the operating component 51 in real time. The cable cross-sectional diameter in this application is expressed as the widest distance of the cable at different angles. Because the cable is subjected to compression deformation and is coated with fire-retardant paint, its cross-section may not be a standard circle.

[0032] like Figures 8-9 As shown, the parallel component 60 includes an upper parallel block 61 and a lower parallel block 62, which are slidably connected. The lower parallel block 62 is perpendicularly connected to the lower auxiliary clamping plate 42, which has a lower through hole 422 for the upper parallel block 61 to pass through. The upper auxiliary clamping plate 32 has an upper through opening 322 and an upper parallel sliding groove 323. The upper parallel block 61 is provided with an upper parallel slider 611 that slides in conjunction with the upper parallel sliding groove 323. The upper through opening 322 is for the lower parallel block 62 to pass through. The sliding direction of the upper parallel block 61 and the lower parallel block 62 is perpendicular to the sliding direction of the upper parallel slider 611 and the upper parallel sliding groove 323. The lower parallel block 62 and the lower auxiliary clamping plate 42 are fixedly connected. Using the lower auxiliary clamping plate 42 as a reference, at the initial angle, the telescopic control component 52 controls the upper clamping plate 30 to move up and down. Because the upper parallel block 61 and the lower parallel block 62 are slidably connected, the upper auxiliary clamping plate 32 can move up and down with the upper clamping plate 30. The distance sensor 53 is used to measure the distance between the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42, which is the cross-sectional diameter of the cable at the initial angle.

[0033] like Figures 10-11 As shown, when the secondary control component 54 controls the lower secondary clamping plate 42 to rotate to other angles, the distance between the upper secondary clamping plate 32 and the lower secondary clamping plate 42 will change with the periphery of the cable. If the width of the cable changes at other angles, the upper secondary clamping plate 32 will slide within the upper sliding groove 312, causing the distance between the upper secondary clamping plate 32 and the lower secondary clamping plate 42 to increase / decrease. The sliding of the upper parallel block 61 and the lower parallel block 62, as well as the sliding of the upper parallel block 61 and the upper secondary clamping plate 32, are all to coordinate with the sliding of the upper secondary clamping plate 32 within the upper sliding groove 312. The ranging sensor 53 still determines the cross-sectional diameter of the cable at other angles by measuring the distance between the upper secondary clamping plate 32 and the lower secondary clamping plate 42.

[0034] The ranging sensor 53 can be a laser ranging sensor 53, an ultrasonic ranging sensor 53, or an infrared ranging sensor 53. Regardless of the type of ranging sensor 53, it has a transmitting end and a reflecting end, which are respectively disposed on the upper auxiliary plate 32 and the lower auxiliary plate 42. The parallel member 60 is disposed on the upper auxiliary plate 32 and the lower auxiliary plate 42 near the connecting plate 20. The cable enters from the lower auxiliary plate 42 away from the connecting plate 20 until it contacts the parallel member 60. Preferably, the ranging sensor 53 is disposed on the upper auxiliary plate 32 and the lower auxiliary plate 42 on the side of the parallel member 60 facing away from the cable.

[0035] The secondary control component 54 includes a motor 541 and an elastic element 542; the upper clamping plate 30 is also provided with an upper elastic groove 313, which is provided along the direction of the upper sliding groove 312 and communicates with the upper sliding groove 312; the elastic element 542 is disposed in the upper elastic groove 313 at one end away from the connecting plate 20; an upper force block 324 is provided on the upper slider 321, which extends into the upper elastic groove 313 and abuts against the end of the elastic element 542 near the connecting plate 20; the elastic element 542 is used to control the upper secondary clamping plate 32 to move toward the connecting plate 20 through the upper force block 324; the motor 541 is disposed in the lower secondary clamping plate 42 and connected to the lower rotating block 421, and is used to drive the lower secondary clamping plate 42 to rotate in the direction of the parallel member 60 through the lower rotating block 421. Motor 541 controls the lower auxiliary clamping plate 42 to rotate in the direction of the parallel member 60, thereby causing the upper auxiliary clamping block to move away from the connecting plate 20. When there is a cable between the upper auxiliary clamping plate 32 and the lower auxiliary clamping plate 42, if the cross-sectional diameter of the cable at other angles increases, the upper auxiliary clamping plate 32 is squeezed by the cable and moves away from the connecting plate 20, compressing the elastic member 542; if the cross-sectional diameter of the cable at other angles decreases, the upper auxiliary clamping plate 32 is squeezed by the elastic member 542 until it comes into contact with the cable, thus completing the measurement of the cross-sectional diameter of the cable at different angles. The rotation angle range of motor 541 is between 0-90 degrees, so the range measured around the cable each time is half (180 degrees). The cross-sectional diameter of the cable at other angles can be measured by adjusting the angle of the connecting plate 20.

[0036] like Figures 12-14As shown, the telescopic control component 52 includes a telescopic cylinder 521 and a telescopic rod 522. The telescopic rod 522 is disposed inside the telescopic cylinder 521 and slidably connected to it. The lower clamping plate 40 has a mounting hole 43 for the telescopic cylinder 521 to pass through. The direction of the mounting hole 43 is consistent with the sliding direction of the upper clamping plate 30. The telescopic cylinder 521 is disposed inside the mounting hole 43 and fixedly connected to the lower clamping plate 40. The end of the telescopic rod 522 away from the telescopic cylinder 521 is fixedly connected to the upper clamping plate 30. The operating component 51 is used to control the telescopic rod 522 to extend and retract within the telescopic cylinder 521, thereby controlling the sliding of the upper clamping block to achieve the purpose of moving closer to or away from the lower clamping plate 40. The telescopic control component 52 can also be controlled by an electromagnet or by a lead screw structure to control the sliding of the upper clamping plate 30.

[0037] The telescopic handheld pole 10 includes a handle 11, a primary pole 12, and a secondary pole 13. The primary pole 12 is connected to the handle 11, and the secondary pole 13 is telescopically slidably connected to the primary pole 12. An operating component 51 is mounted on the handle 11, and a connecting plate 20 is connected to the end of the secondary pole 13 furthest from the handle 11. The telescopic handheld pole 10 can have more sections; this application uses a two-section example. The multi-stage telescopic handheld pole 10 can be manually extended, and the operator can control each component on the handle 11. Correspondingly, the operating component 51 includes buttons for controlling the telescopic control component 52, buttons for the motor 541, and a display screen for displaying the values ​​of the distance sensor 53.

[0038] The connecting plate 20 is hinged to the secondary rod 13. The hinge between the connecting plate 20 and the telescopic hand rod 10 allows the connecting plate 20 to rotate, thereby enabling the measurement of the cross-sectional diameter of the cable at different angles, and allowing the upper clamping plate 30 and the lower clamping plate 40 to extend into hard-to-reach corners and other places, making the invention able to cope with more complex cable laying environments.

[0039] It also includes a support rod 71 and a protective cover 72, with the protective cover 72 located at one end of the support rod 71; a support ring 121 is provided on the primary rod 12, and the support member passes through the support ring 121 and is movably connected to the support ring 121; when the support rod 71 is arranged parallel to the primary rod 12, the connecting plate 20, the upper clamping plate 30, and the lower clamping plate 40 can extend into the protective cover 72; when the support rod 71 is not arranged parallel to the primary rod 12, the support rod 71 and the protective cover 72 are used to support the primary rod 12. The support rod 71 and the support ring 121 are separable. The end of the support rod 71 away from the protective cover 72 can pass through the support ring 121. When the cable diameter measuring device is used, the support rod 71 and the protective cover 72 are placed on the ground for the first-stage rod 12 to lean against, making it easier and more stable for the user to measure the cable diameter. When the cable diameter measuring device is not used, the support rod 71 is moved to a position parallel to the first-stage rod 12, and then the second-stage rod 13 is extended back and forth, allowing the connecting plate 20, the upper clamping plate 30, and the lower clamping plate 40 to enter the protective cover 72. The shape of the protective cover 72 matches the connecting plate 20, thereby locking the connecting plate 20, which protects the upper clamping plate 30 and the lower clamping plate 40.

[0040] The support rod 71 includes a straight portion 711 and a bent portion 712. The bent portion 712 is located at one end of the straight portion 711, and the protective cover 72 is located at the other end of the straight portion 711. Both the bent portion 712 and the straight portion 711 can pass through the support ring 121. A support groove 7121 is formed on the bent portion 712 for the support ring 121 to support it. When the straight portion 711 is in the support ring 121, the support rod 71 and the primary rod 12 are parallel, and the protective cover 72 can engage with the connecting plate 20. When the bent portion 712 is in the support ring 121, the primary rod 12 can rest against the support groove 7121 and can rotate slightly, which is convenient for the operator to measure the cable diameter.

[0041] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cable diameter measuring device, characterized by, It includes a telescopic hand lever (10), a connecting plate (20), an upper clamping plate (30), a lower clamping plate (40), an operating component (51), a telescopic control component (52), and a distance measuring sensor (53); The connecting plate (20) is disposed at one end of the telescopic hand handle (10), and the telescopic hand handle (10) is used to adjust the length of the connecting plate (20) extending outward; The upper clamping plate (30) is slidably connected to the connecting plate (20), the lower clamping plate (40) is fixedly connected to the connecting plate (20), the telescopic control member (52) is disposed on the lower clamping plate (40), the control end of the telescopic control member (52) is connected to the upper clamping plate (30), the telescopic control member (52) is used to control the upper clamping plate (30) to move closer to the lower clamping plate (40) or to control the upper clamping plate (30) to move away from the lower clamping plate (40), the distance sensor (53) is disposed on the upper clamping plate (30) and the lower clamping plate (40), and is used to measure the distance between the upper clamping plate (30) and the lower clamping plate (40); The operation component (51) is located at the end of the telescopic hand lever (10) away from the connecting plate (20). The operation component (51) is coupled to the telescopic control component (52) and the distance sensor (53) respectively, and is used to control the extension and retraction of the telescopic control key and to display the distance measurement result of the distance sensor (53). The upper clamping plate (30) has an upper opening (31) at one end away from the connecting plate (20). The upper opening (31) is opened through the upper clamping plate (30) in the sliding direction. The upper opening (31) makes the upper clamping plate (30) form upper inner walls (311) on both sides opposite each other. Both sides of the upper inner walls (311) have upper sliding grooves (312) communicating with the upper opening (31). The upper sliding grooves (312) extend along the upper inner walls (311) and the direction of extension is perpendicular to the sliding direction of the upper clamping plate (30). An upper auxiliary clamping plate (32) is provided inside the upper opening (31), and upper sliding blocks (321) that are movably connected to the upper sliding groove (312) are provided on both sides of the upper auxiliary clamping plate (32). The upper sliding blocks (321) are cylindrical. The lower clamping plate (40) has a lower opening (41) at one end away from the connecting plate (20). The lower opening (41) is opened through the upper clamping plate (30) in the direction of sliding. The lower opening (41) makes the lower clamping plate (40) form two opposing lower inner walls (411). Both sides of the lower inner walls (411) have lower rotating holes (412) that communicate with the lower opening (41). A lower auxiliary clamping plate (42) is provided inside the lower opening (41), and lower rotating blocks (421) that are rotatably connected to the lower rotating hole (412) are provided on both sides of the lower auxiliary clamping plate (42). The ranging sensor (53) is mounted on the upper sub-clamp plate (32) and the lower sub-clamp plate (42); It also includes a parallel member (60), one end of which is perpendicularly connected to the lower auxiliary clamping plate (42) and the other end is perpendicularly connected to the upper auxiliary clamping plate (32) to keep the upper auxiliary clamping plate (32) and the lower auxiliary clamping plate (42) parallel. The parallel member (60) is telescopic to adjust the distance between the upper auxiliary clamping plate (32) and the lower auxiliary clamping plate (42). The parallel member (60) and the upper auxiliary clamping plate (32) are slidable. It also includes a secondary control component (54) coupled to the operation component (51), the secondary control component (54) being connected to the upper secondary clamping plate (32) and the lower secondary clamping plate (42) respectively, for controlling the upper secondary clamping plate (32) and the lower secondary clamping plate (42) to clamp the cable at different angles.

2. The cable diameter measuring device of claim 1, wherein, The parallel component (60) includes an upper parallel block (61) and a lower parallel block (62), which are slidably connected. The lower parallel block (62) is vertically connected to the lower auxiliary clamping plate (42). The lower auxiliary clamping plate (42) has a lower through hole (422) for the upper parallel block (61) to pass through. The upper auxiliary clamping plate (32) is provided with an upper through-hole (322) and an upper parallel slide groove (323). The upper parallel block (61) is provided with an upper parallel slider (611) that slides and cooperates with the upper parallel slide groove (323). The upper through-hole (322) is used for the lower parallel block (62) to pass through. The sliding direction of the upper parallel block (61) and the lower parallel block (62) is perpendicular to the sliding direction of the upper parallel slider (611) and the upper parallel groove (323).

3. The cable diameter measuring device according to claim 2, characterized in that, The secondary control component (54) includes a motor (541) and an elastic element (542); The upper clamping plate (30) is also provided with an upper elastic groove (313), which is provided along the direction of the upper sliding groove (312) and communicates with the upper sliding groove (312). The elastic element (542) is provided in the upper elastic groove (313) at one end away from the connecting plate (20). The upper slider (321) is provided with an upper force block (324), which extends into the upper elastic groove (313) and abuts against the end of the elastic member (542) near the connecting plate (20). The elastic member (542) is used to control the upper auxiliary clamping plate (32) to move toward the connecting plate (20) through the upper force block (324). The motor (541) is located inside the lower sub-clamp plate (42) and connected to the lower rotating block, and is used to drive the lower sub-clamp plate (42) to rotate in the direction of the parallel piece (60) via the lower rotating block (421).

4. The cable diameter measuring device according to claim 1, characterized in that, The telescopic control component (52) includes a telescopic cylinder (521) and a telescopic rod (522). The telescopic rod (522) is disposed inside the telescopic cylinder (521) and slidably connected to the telescopic cylinder (521). The lower clamping plate (40) has a mounting hole (43) for the telescopic cylinder (521) to pass through. The direction of the mounting hole (43) is consistent with the sliding direction of the upper clamping plate (30). The telescopic cylinder (521) is fixedly connected to the lower clamping plate (40) in the mounting hole (43), and the end of the telescopic rod (522) away from the telescopic cylinder (521) is fixedly connected to the upper clamping plate (30).

5. The cable diameter measuring device according to claim 1, characterized in that, The telescopic hand lever (10) includes a handle (11), a primary lever (12), and a secondary lever (13); The first-stage rod (12) is connected to the handle (11), the second-stage rod (13) is telescopically slidably connected to the first-stage rod (12), the operating component (51) is disposed on the handle (11), and the connecting plate (20) is connected to the end of the second-stage rod (13) away from the handle (11).

6. The cable diameter measuring device according to claim 5, characterized in that, The connecting plate (20) is hinged to the secondary rod (13).

7. The cable diameter measuring device according to claim 5, characterized in that, It also includes a support rod (71) and a protective cover (72), the protective cover (72) being disposed at one end of the support rod (71); A support ring (121) is provided on the first-stage rod (12), and the support member passes through the support ring (121) and is movably connected to the support ring (121); When the support rod (71) is set parallel to the first-stage rod (12), the connecting plate (20), the upper clamping plate (30) and the lower clamping plate (40) can extend into the protective cover (72); When the support rod (71) is not set parallel to the first-stage rod (12), the support rod (71) and the protective cover (72) are used to support the first-stage rod (12).

8. The cable diameter measuring device according to claim 7, characterized in that, The support rod (71) includes a straight part (711) and a bent part (712). The bent part (712) is located at one end of the straight part (711), and the protective cover (72) is located at the other end of the straight part (711). Both the bent part (712) and the straight part (711) can pass through the support ring (121). The bent part (712) has a support groove (7121) for supporting the support ring (121).

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