A kind of optical cable metal belt on-off detection device and detection method

Abstract

The present invention discloses a device and method for detecting the continuity of optical cable metal bands, which relates to the technical field of optical cable production detection, and includes a bottom plate, a positioning shell, and a limit block for supporting the optical cable. Two positioning shells are arranged on the top of the bottom plate, and the limit blocks are fixedly installed in the inner cavities of the two positioning shells. The tops of the two limit blocks are provided with a slot for positioning the optical cable. The interiors of the two positioning shells are provided with a limit assembly for limiting the position of optical cables of different sizes, and the exteriors of the positioning shells are provided with a reeling assembly for reeling in the optical cable. The limit assembly includes a brake plate and a limit strip, and sliding tracks are symmetrically installed on both sides of the limit block. Through the mutual cooperation of the above-mentioned components, it is beneficial to limit the position of cables of different sizes, prevent the cable cutting unit from bending when cutting into the metal band, and allow the cable cutting unit to quickly cut into the metal band, effectively reducing the adverse effects on the normal detection of the metal band inside the cable.

Description

Technical Field

[0001] The invention relates to the technical field of optical cable production detection, and in particular to an optical cable metal belt on-off detection device and a detection method. Background Art

[0002] With the development of communication technology, optical cables, as a transmission medium for communication, are used in more and more scenarios. In the production process of optical cables, a layer of metal tape is generally set inside the optical cable as a metal armor layer, and the cable core is wrapped in the metal tape to increase the strength of the optical cable and play a shielding role.

[0003] According to the Chinese patent application with application number 202311614198.8, a fiber optic cable metal belt on-off detection device and detection method belong to the field of fiber optic cable production and testing technology, including an alarm mechanism and a cutting mechanism. The alarm mechanism is connected to the two cutting mechanisms through wires, and a blade is used to cut into the two ends of the optical cable so that the blade contacts the metal belt in the optical cable. When the metal belt is not broken, the two cutting mechanisms can be connected through the metal belt and form a closed loop with the alarm mechanism to determine whether the metal belt is broken through an alarm; at the same time, the blade is divided into a main blade and a secondary blade.

[0004] According to the above-cited application documents, one end of the cable is passed through two fixing grooves, and the outer wall of the cable is fitted with the inner wall of the fixing groove. Then, the outer wall of the cable is clamped by using a fixing and cable clamping unit to fix the outside of the cable. Then, two cable cutting units are used to cut into the inside of the cable and contact the metal belt inside the optical cable. Whether the metal belt is broken is judged by observing the operating status of the alarm mechanism. However, cables used in different fields have different sizes, resulting in different curvatures of the fixing groove and the cable, resulting in a smaller contact area between the outer wall of the larger cable and the inner wall of the fixing groove, resulting in the cable located inside the fixing groove being easily bent when the cable cutting unit is used to cut it, making it impossible for the cutting end of the cable cutting unit to quickly cut into the inside of the cable, thereby adversely affecting the normal detection of the metal belt inside the cable. Summary of the invention

[0005] The object of the present invention is to provide a device and method for detecting the continuity of a metal belt of an optical cable, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device and method for detecting the on-off state of an optical cable metal belt, comprising a base plate, a positioning shell and a limit block for supporting the optical cable, two positioning shells are arranged on the top of the base plate, and limit blocks are fixedly installed in the inner cavities of the two positioning shells, and slots for positioning the optical cable are provided on the tops of the two limit blocks, and limit assemblies for limiting the position of optical cables of different sizes are arranged inside the two positioning shells, and a winding assembly for winding the optical cable is arranged outside the positioning shells.

[0007] The limit assembly includes a brake plate and a limit strip. Sliding rails are symmetrically installed on both sides of the limit block. Brake plates are slidably installed in the inner cavities of the two sliding rails. The two brake plates extend from one end of the sliding rail to the top of the limit block, and a limit strip is arranged between the two brake plates. The two ends of the limit strip are fixedly connected to the adjacent sides of the two brake plates.

[0008] The limit assembly also includes a driving threaded rod, wherein a sliding block perpendicular to its side wall is fixedly installed on one side of a brake plate away from the limit block, and a threaded hole connected to its bottom is opened on the top of the sliding block, and a reciprocating motor is fixedly installed on the side of the limit block close to the sliding block, and a driving threaded rod is fixedly installed on the power output end of the reciprocating motor, and the end of the driving threaded rod away from the reciprocating motor passes through the threaded hole and extends to directly above the sliding block.

[0009] Preferably, the limiting strip is made of a soft rubber material, and the limiting strip is located directly above the limiting block.

[0010] Preferably, the limiting assembly further comprises a first clamping plate and a second clamping plate, which are symmetrically installed on both sides of the inner cavity of the positioning shell, and the two first clamping plates and the second clamping plates are respectively located on the left and right sides of the limiting block, and the two first clamping plates are fixedly installed with support strips for supporting the cable on one side close to the second clamping plate, and the two second clamping plates are provided with a receiving groove matched with the support strip on one side close to the first clamping plate, and the end of the support strip away from the first clamping plate is inserted into the inner cavity of the receiving groove.

[0011] Preferably, a thread groove is formed on one side adjacent to the two first clamping plates and the second clamping plates, wherein a bidirectional threaded rod is provided between the first clamping plate and the second clamping plate, both ends of the two bidirectional threaded rods pass through the two thread grooves and are rotatably connected to the inner wall of the positioning shell, and one end of the two bidirectional threaded rods extends to the outside of the positioning shell, and the two bidirectional threaded rods extending to the outside of the positioning shell are fixedly installed with tensioning wheels, the two tensioning wheels are rotatably connected by a tensioning belt, and a driving motor for rotating one of the tensioning wheels is fixedly installed on the outer wall of the positioning shell.

[0012] Preferably, guide holes are provided on adjacent sides of the two first clamping plates and the second clamping plates, and a guide column is provided between the two first clamping plates and the second clamping plates, with both ends of the guide column passing through the two guide holes and fixedly connected to the inner wall of the positioning shell.

[0013] Preferably, the winding assembly includes a winding roller and a clamping block, a U-shaped frame is fixedly installed on the top of one end of the base plate, the winding roller is arranged in the inner cavity of the U-shaped frame, and the two ends of the winding roller are rotatably connected to the two sides of the inner cavity of the U-shaped frame, and a positioning hole for inserting the free end of the cable is opened on the outer wall of the winding roller, and clamping blocks for clamping the free end of the cable are elastically installed on both sides of the inner cavity of the positioning hole.

[0014] Preferably, sliding grooves are symmetrically provided on both sides of the inner cavity of the positioning hole, and sliding rods are fixedly installed on the sides of the two clamping blocks away from each other, and the ends of the two sliding rods away from the clamping blocks are inserted into the inner cavities of the two sliding grooves, and the inner walls of the two sliding grooves away from their own open ends are fixedly provided with extrusion springs connected to the outer walls of the sliding rods, and the outer wall of the winding roller is symmetrically provided with braking grooves connected to the inner cavities of the sliding grooves along the axial direction, and a push block is fixedly installed on the outer wall of the sliding rod, and the end of the push block away from the sliding rod passes through the braking groove and extends to the outside of the winding roller.

[0015] Preferably, guide grooves are symmetrically provided at the top of the base plate along the longitudinal direction, wherein the bottom of one positioning shell is fixedly connected to the top of the base plate, and sliding blocks are symmetrically installed at the bottom of the other positioning shell, and the two sliding blocks are slidably installed in the inner cavities of the two guide grooves, wherein a mounting ear plate is fixedly installed on one side of the positioning shell that is slidably connected to the top of the base plate, a connecting hole connected to the bottom of the mounting ear plate is provided at the top, a fastening bolt is movably installed in the inner cavity of the connecting hole, and a plurality of fastening holes matching the fastening bolts are provided at the top of the base plate along the longitudinal direction.

[0016] A method for detecting the continuity of a metal belt of an optical cable comprises the following steps:

[0017] A1. After the cable is located between the limit block and the limit strip, press the two adjacent brake plates at the same time until the limit strip is deformed and tightly wrapped around the outside of the cable. Under the action of the limit strip, apply pressure to the outside of the cable to make the cable and the inner wall of the slot fit tightly until the curvature of the limit strip is the same as the curvature of the outer wall of the cable, which is conducive to limiting the position of cables of different sizes and preventing the cable cutting unit from bending when cutting into the metal belt.

[0018] A2. Insert the free end of the cable into the positioning hole until the free end of the cable moves between the two clamps and the two clamps clamp the free end of the cable. Then release the limit assembly from clamping the outside of the cable. Then start the drive motor to rotate the reel, which is conducive to winding the cable neatly around the outside of the reel and allowing the cable to move intermittently, which is conducive to the cable cutting unit cutting into the cable from different positions. The alarm unit can be used to detect longer cables multiple times.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention describes a device and method for detecting the continuity of a metal band of an optical cable.

[0021] 1. The limit strip is deformed by force and tightly wrapped around the outside of the cable. Under the action of the limit strip, pressure is applied to the outside of the cable to make the cable and the inner wall of the slot fit tightly together until the curvature of the limit strip is the same as the curvature of the outer wall of the cable. This is beneficial for limiting the position of cables of different sizes and preventing the cable cutting unit from bending when cutting into the metal belt. The cable cutting unit can quickly cut into the metal belt, effectively reducing the adverse effects on the normal detection of the metal belt inside the cable.

[0022] 2. Insert the free end of the cable into the positioning hole until the free end of the cable moves between the two clamps and the two clamps clamp the free end of the cable. Then release the limit assembly from clamping the outside of the cable. Then start the drive motor to rotate the winding roller, which is conducive to winding the cable neatly around the outside of the winding roller and allowing the cable to move intermittently, which is conducive to the cable cutting unit cutting into the inside of the cable from different positions of the cable. Use the alarm unit to detect longer cables multiple times, which is conducive to discovering problems with the metal belt inside the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 A cross-sectional view of a positioning housing of the present invention;

[0025] Figure 3 It is an assembly diagram of the bidirectional threaded rod and the first clamping plate of the present invention;

[0026] Figure 4 It is an assembly diagram of the sliding block and the positioning housing of the present invention;

[0027] Figure 5 It is an assembly diagram of the first splint and the second splint of the present invention;

[0028] Figure 6 is a cross-sectional view of the winding roller of the present invention;

[0029] Figure 7 For the present invention Figure 1 A magnified view of the structure at center.

[0030] In the figure: 1. bottom plate; 2. positioning shell; 3. guide groove; 4. fastening hole; 5. limit strip; 6. limit block; 7. U-shaped frame; 8. winding roller; 9. brake plate; 10. first clamping plate; 11. second clamping plate; 12. two-way threaded rod; 13. guide column; 14. sliding track; 15. support strip; 16. sliding block; 17. fastening bolt; 18. mounting ear plate; 19. driving threaded rod; 20. extrusion spring; 21. push block; 22. sliding rod; 23. clamping block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0032] See also Figure 1-7 The present embodiment provides an optical cable metal belt on-off detection device and detection method, comprising a base plate 1, a positioning shell 2 and a limit block 6 for supporting the optical cable, two positioning shells 2 are arranged on the top of the base plate 1, and the limit blocks 6 are fixedly installed in the inner cavities of the two positioning shells 2, wherein the top of the positioning shell 2 is provided with an extension groove connected to its own inner cavity, and the top of the limit block 6 passes through the extension groove and extends to the top of the positioning shell 2.

[0033] The tops of the two limit blocks 6 are each provided with a slot for positioning the optical cable, the interiors of the two positioning shells 2 are provided with a limit assembly for limiting the position of optical cables of different sizes, and the exterior of the positioning shell 2 is provided with a winding assembly for winding the optical cable, the free end of the cable is passed through the tops of the two slots, and then the outer wall of the cable is fitted with the inner walls of the two slots, and at the same time the free end of the cable is fixed inside the winding assembly, then the limit assembly is used to press the outer wall of the cable to make the outer wall of the cable and the inner wall of the slot fit more closely, and then the cable cutting unit is used to cut the cable located between the two limit blocks 6, the cable cutting unit is allowed to cut into the metal belt inside the cable, the detection ends of the alarm mechanism are respectively connected to the outsides of the two cable cutting units, so that the alarm mechanism cooperates with the cable to form a closed loop, and the operation of the alarm mechanism indicates that the metal belt inside the cable is not broken, otherwise it indicates that the metal belt inside the cable is broken.

[0034] The limiting assembly includes a brake plate 9 and a limiting strip 5. Sliding rails 14 are symmetrically installed on both sides of the limiting block 6. Brake plates 9 are slidably installed in the inner cavities of the two sliding rails 14. The two brake plates 9 extend to the top of the limiting block 6 at one end away from the sliding rail 14. The two brake plates 9 are both arranged as an L-shaped structure, which is beneficial for one end of the brake plate 9 to extend into the inside of the sliding rail 14 and the other end to extend to the top of the limiting block 6. The sliding rail 14 is beneficial for limiting the sliding trajectory of the brake plate 9, which is beneficial for improving the stability of the brake plate 9 sliding up and down.

[0035] A limit strip 5 is arranged between the two brake plates 9, and the two ends of the limit strip 5 are fixedly connected to the adjacent sides of the two brake plates 9, and the limit strip 5 is located directly above the limit block 6. When the free end of the cable passes directly above the two limit blocks 6 and is located between the limit block 6 and the limit strip 5, the two adjacent brake plates 9 are pressed simultaneously until the limit strip 5 is deformed and tightly wrapped around the outside of the cable, and under the action of the limit strip 5, pressure is applied to the outside of the cable to make the cable and the inner wall of the slot fit tightly together until the curvature of the limit strip 5 is the same as the curvature of the outer wall of the cable, which is beneficial for limiting the cables of different sizes and preventing the cable cutting unit from bending when cutting into the metal belt, so that the cable cutting unit can quickly cut into the metal belt, effectively reducing the adverse effects on the normal detection of the metal belt inside the cable.

[0036] The limiting assembly also includes a driving threaded rod 19, wherein a sliding block perpendicular to its side wall is fixedly installed on one side of a brake plate 9 away from the limiting block 6, and a threaded hole connected to its bottom is opened on the top of the sliding block, and a reciprocating motor is fixedly installed on the side of the limiting block 6 close to the sliding block, and a driving threaded rod 19 is fixedly installed on the power output end of the reciprocating motor, and the end of the driving threaded rod 19 away from the reciprocating motor passes through the threaded hole and extends to just above the sliding block, wherein the reciprocating motor is started to rotate the driving threaded rod 19, and with the cooperation of the threaded hole, the brake plate 9 is allowed to slide along the sliding track 14, and at the same time, the rotation direction of the reciprocating motor is controlled, thereby effectively controlling the moving direction of the brake plate 9 and positioning the brake plate 9 after movement, which is beneficial for the limiting bar 5 to limit cables of different sizes.

[0037] The limiting strip 5 is made of a soft rubber material, which can increase the plastic deformation capability of the limiting strip 5 , facilitate the limiting strip 5 to deform and wrap around the outside of the cable, and improve the service life of the limiting strip 5 .

[0038] The limiting assembly includes a first clamp plate 10 and a second clamp plate 11. The first clamp plate 10 and the second clamp plate 11 are symmetrically installed on both sides of the inner cavity of the positioning shell 2. The two first clamp plates 10 and the second clamp plates 11 are respectively located on the left and right sides of the limiting block 6. When the cable passes through the top of the two limiting blocks 6, the cable passes between the adjacent first clamp plates 10 and the second clamp plates 11 at the same time, and then the two first clamp plates 10 and the second clamp plates 11 are pushed at the same time, so that the adjacent sides of the first clamp plate 10 and the second clamp plate 11 are simultaneously fitted with the outer wall of the cable, which is beneficial to clamping the outer wall of the cable and increases the stability of the cable at the top of the limiting block 6.

[0039] A support bar 15 for supporting the cable is fixedly installed on one side of the two first clamps 10 close to the second clamp 11, and a receiving groove matched with the support bar 15 is opened on one side of the two second clamps 11 close to the first clamp 10. The end of the support bar 15 away from the first clamp 10 is inserted into the inner cavity of the receiving groove. When the first clamp 10 and the second clamp 11 are in contact with the outer wall of the cable at the same time, the outer wall of the cable and the top of the support bar 15 are in contact, which further increases the stability of the cable and prevents the cable from shaking between the first clamp 10 and the second clamp 11.

[0040] Furthermore, the first clamping plate 10 and the second clamping plate 11 move relative to each other until the support bar 15 always slides inside the accommodating groove, which is beneficial to control the sliding distance of the first clamping plate 10 and the second clamping plate 11 and externally clamp cables of different sizes.

[0041] A thread groove is provided on one side adjacent to the two first clamps 10 and the second clamps 11, wherein a bidirectional threaded rod 12 is provided between the first clamps 10 and the second clamps 11, and both ends of the two bidirectional threaded rods 12 pass through the two thread grooves and are rotatably connected to the inner wall of the positioning shell 2, and one end of the two bidirectional threaded rods 12 extends to the outside of the positioning shell 2. Rotating the two bidirectional threaded rods 12 with the cooperation of the thread grooves is conducive to controlling the distance between the first clamps 10 and the second clamps 11, and fixing the first clamps 10 and the second clamps 11 after moving.

[0042] The two bidirectional threaded rods 12 extend to the outside of the positioning shell 2 and are fixedly installed with tension wheels. The two tension wheels are rotatably connected by a tensioning belt. A driving motor for rotating one of the tension wheels is fixedly installed on the outer wall of the positioning shell 2. The power output end of the driving motor is fixedly connected to one end of one of the tension wheels. The driving motor is started to rotate one of the tension wheels. The tensioning belt transmits the power of the rotating tension wheel to the other tension wheel, allowing the two tension wheels to rotate synchronously, which is conducive to the synchronous rotation of the two bidirectional threaded rods 12.

[0043] A guide hole is provided on one side adjacent to the two first clamps 10 and the second clamps 11, and a guide column 13 is provided between the two first clamps 10 and the second clamps 11, and both ends of the guide column 13 pass through the two guide holes and are fixedly connected to the inner wall of the positioning shell 2. When the adjacent first clamps 10 and the second clamps 11 move relative to each other, under the action of the guide column 13 and the guide hole, the sliding trajectory of the first clamps 10 and the second clamps 11 can be limited, thereby preventing the first clamps 10 and the second clamps 11 from shaking and deflecting when sliding relative to each other, thereby improving the stability of movement between the adjacent first clamps 10 and the second clamps 11. Example

[0044] See also Figure 1-7 , further improvements made on the basis of Example 1:

[0045] The winding assembly includes a winding roller 8 and a clamping block 23. A U-shaped frame 7 is fixedly installed on the top of one end of the base plate 1. The winding roller 8 is arranged in the inner cavity of the U-shaped frame 7, and the two ends of the winding roller 8 are rotatably connected to the two sides of the inner cavity of the U-shaped frame 7. The U-shaped frame 7 can support the winding roller 8. At the same time, a transmission motor is installed on one side of the U-shaped frame 7, and the power output end of the transmission motor is connected to one end of the winding roller 8. Starting the transmission motor allows the winding roller 8 to rotate, which is conducive to the winding of the cable by the winding roller 8.

[0046] The outer wall of the winding roller 8 is provided with a positioning hole for inserting the free end of the cable, and clamping blocks 23 for clamping the free end of the cable are elastically installed on both sides of the inner cavity of the positioning hole. After the free end of the cable passes through the top of the two limit blocks 6, the free end of the cable is inserted into the positioning hole until the free end of the cable moves between the two clamping blocks 23, and the two clamping blocks 23 clamp the free end of the cable. Then, the limit assembly releases the clamping of the outside of the cable, and then the transmission motor is started to rotate the winding roller 8, which is conducive to neatly winding the cable around the outside of the winding roller 8 and allowing the cable to move intermittently, which is conducive to the cable cutting unit cutting into the inside of the cable from different positions of the cable, and using the alarm unit to detect cables with longer lengths multiple times, which is conducive to discovering problems with the metal belt inside the cable.

[0047] Furthermore, anti-skid pads are fixedly installed on adjacent sides of the two clamping blocks 23, which can increase the friction between the clamping blocks 23 and the outer wall of the cable and prevent the free end of the cable from escaping from the inside of the positioning hole.

[0048] Sliding grooves are symmetrically provided on both sides of the inner cavity of the positioning hole, and sliding rods 22 are fixedly installed on the side away from the two clamping blocks 23. The ends of the two sliding rods 22 away from the clamping blocks 23 are inserted into the inner cavities of the two sliding grooves. The sliding grooves can limit the sliding trajectory of the sliding rods 22, prevent the clamping blocks 23 from shaking when sliding, and improve the stability of the clamping blocks 23.

[0049] The two sliding grooves are fixedly installed with an extrusion spring 20 connected to the outer wall of the sliding rod 22 on the inner wall away from the open end thereof. The extrusion spring 20 can apply a thrust to the sliding rod 22 to slide away from the sliding groove, which is beneficial to increase the pressure applied by the clamping block 23 on the free end of the cable, and further improve the stability of the free end of the cable inside the positioning hole.

[0050] The outer wall of the winding roller 8 is symmetrically provided with braking grooves connected to the inner cavity of the sliding groove along the axial direction. A push block 21 is fixedly installed on the outer wall of the sliding rod 22. The end of the push block 21 away from the sliding rod 22 passes through the braking groove and extends to the outside of the winding roller 8. When the free end of the cable is inserted between the two clamping blocks 23, the two push blocks 21 are pushed at the same time to increase the distance between the two clamping blocks 23, and then the free end of the cable is inserted between the two clamping blocks 23. Then, the thrust applied to the outside of the two push blocks 21 is canceled to reset the extrusion spring 20, thereby realizing the clamping of the free end of the cable by the two clamping blocks 23.

[0051] The top of the base plate 1 is symmetrically provided with guide grooves 3 along the longitudinal direction, wherein the bottom of one positioning shell 2 is fixedly connected to the top of the base plate 1, and the bottom of the other positioning shell 2 is symmetrically installed with sliding blocks 16, and the two sliding blocks 16 are slidably installed in the inner cavity of the two guide grooves 3, wherein with the cooperation of the sliding blocks 16 and the guide grooves 3, the sliding trajectory of the positioning shell 2 can be limited, which is beneficial to improve the stability of the back and forth movement of the positioning shell 2.

[0052] Furthermore, by pushing one of the positioning shells 2, the distance between the two positioning shells 2 is controlled, thereby effectively controlling the length of the cable between the two limit blocks 6, which is conducive to using the alarm mechanism to detect cables of different lengths.

[0053] A mounting ear plate 18 is fixedly installed on one side of the positioning shell 2 which is slidably connected to the top of the base plate 1, and a connecting hole connected to the bottom of the mounting ear plate 18 is provided on the top of the mounting ear plate 18, and a fastening bolt 17 is movably installed in the inner cavity of the connecting hole. A plurality of fastening holes 4 which are compatible with the fastening bolt 17 are provided on the top of the base plate 1 along the longitudinal direction, and a spiral groove is provided on the inner wall of the fastening hole 4. When the positioning shell 2 slides a certain distance, the middle of the opening end of the connecting hole and the middle of the opening end of the fastening hole 4 are on the same horizontal line, and then the fastening bolt 17 is inserted into the inside of the connecting hole until the bottom of the fastening bolt 17 is inserted into the inside of the fastening hole 4, and then the fastening bolt 17 is rotated to engage the spiral groove outside the fastening bolt 17 with the inside of the fastening hole 4, which is conducive to positioning the positioning shell 2 after movement.

[0054] Furthermore, the plurality of fastening holes 4 can limit the positioning housing 2 that slides to different positions, which is beneficial for accurately controlling the distance between the two positioning housings 2 .

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical cable metal belt on-off detection device, characterized in that: The invention comprises a bottom plate (1), a positioning shell (2) and a limit block (6) for supporting an optical cable, wherein two positioning shells (2) are arranged on the top of the bottom plate (1), the limit blocks (6) are fixedly installed in the inner cavities of the two positioning shells (2), the tops of the two limit blocks (6) are provided with a slot for positioning the optical cable, the insides of the two positioning shells (2) are provided with a limit assembly for limiting the position of optical cables of different sizes, and the outside of the positioning shells (2) is provided with a reeling assembly for reeling in the optical cable; The limit assembly comprises a brake plate (9) and a limit strip (5), the two sides of the limit block (6) are symmetrically mounted with sliding rails (14), the inner cavities of the two sliding rails (14) are both slidably mounted with brake plates (9), the ends of the two brake plates (9) away from the sliding rails (14) extend to the top of the limit block (6), and a limit strip (5) is arranged between the two brake plates (9), the two ends of the limit strip (5) and the adjacent sides of the two brake plates (9) are fixedly connected, and the limit strip (5) is deformed by force so as to be tightly wrapped around the outside of the optical cable; The limit assembly further comprises a driving threaded rod (19), wherein a sliding block perpendicular to the side wall of one brake plate (9) is fixedly mounted on a side away from the limit block (6), the top of the sliding block is provided with a threaded hole connected to the bottom of the sliding block, a reciprocating motor is fixedly mounted on a side of the limit block (6) close to the sliding block, a driving threaded rod (19) is fixedly mounted on a power output end of the reciprocating motor, and an end of the driving threaded rod (19) away from the reciprocating motor passes through the threaded hole and extends to directly above the sliding block.

2. The optical cable metal tape on-off detection device according to claim 1, characterized in that: The limiting strip (5) is made of a soft rubber material, and the limiting strip (5) is located directly above the limiting block (6).

3. The optical cable metal tape continuity detection device according to claim 2, characterized in that: The limiting assembly further comprises a first clamping plate (10) and a second clamping plate (11), the first clamping plate (10) and the second clamping plate (11) are symmetrically installed on both sides of the inner cavity of the positioning shell (2), the two first clamping plates (10) and the second clamping plates (11) are respectively located on the left and right sides of the limiting block (6), and a support bar (15) for supporting the cable is fixedly installed on one side of the two first clamping plates (10) close to the second clamping plates (11), and a receiving groove matched with the support bar (15) is opened on one side of the two second clamping plates (11) close to the first clamping plates (10), and the end of the support bar (15) away from the first clamping plate (10) is inserted into the inner cavity of the receiving groove.

4. The optical cable metal tape on-off detection device according to claim 3, characterized in that: A thread groove is provided on one side adjacent to the two first clamping plates (10) and the second clamping plates (11), wherein a bidirectional threaded rod (12) is provided between the first clamping plates (10) and the second clamping plates (11), and both ends of the two bidirectional threaded rods (12) pass through the two thread grooves and are rotatably connected to the inner wall of the positioning shell (2), and one end of the two bidirectional threaded rods (12) extends to the outside of the positioning shell (2), and the two bidirectional threaded rods (12) extending to the outside of the positioning shell (2) are fixedly mounted with tension wheels, and the two tension wheels are rotatably connected via a tensioning belt, and a driving motor for rotating one of the tension wheels is fixedly mounted on the outer wall of the positioning shell (2).

5. The optical cable metal tape on-off detection device according to claim 4, characterized in that: A guide hole is provided on one side adjacent to the two first clamping plates (10) and the second clamping plates (11), and a guide column (13) is provided between the two first clamping plates (10) and the second clamping plates (11). Both ends of the guide column (13) pass through the two guide holes and are fixedly connected to the inner wall of the positioning housing (2).

6. The optical cable metal tape continuity detection device according to claim 1, characterized in that: The winding assembly comprises a winding roller (8) and a clamping block (23); a U-shaped frame (7) is fixedly mounted on the top of one end of the bottom plate (1); the winding roller (8) is arranged in the inner cavity of the U-shaped frame (7); and the two ends of the winding roller (8) are rotatably connected to the two sides of the inner cavity of the U-shaped frame (7); a positioning hole for inserting the free end of the cable is formed on the outer wall of the winding roller (8); and clamping blocks (23) for clamping the free end of the cable are elastically mounted on both sides of the inner cavity of the positioning hole.

7. The optical cable metal tape continuity detection device according to claim 6, characterized in that: Sliding grooves are symmetrically provided on both sides of the inner cavity of the positioning hole, and sliding rods (22) are fixedly installed on the sides away from the two clamping blocks (23), and the ends of the two sliding rods (22) away from the clamping blocks (23) are inserted into the inner cavities of the two sliding grooves, and the inner walls of the two sliding grooves away from their own opening ends are fixedly installed with extrusion springs (20) connected to the outer walls of the sliding rods (22); The outer wall of the winding roller (8) is symmetrically provided with a brake groove connected to the inner cavity of the sliding groove along the axial direction, and a push block (21) is fixedly installed on the outer wall of the sliding rod (22). The end of the push block (21) away from the sliding rod (22) passes through the brake groove and extends to the outside of the winding roller (8).

8. The optical cable metal tape continuity detection device according to claim 1, characterized in that: The top of the bottom plate (1) is symmetrically provided with guide grooves (3) along the longitudinal direction, the bottom of one positioning shell (2) is fixedly connected to the top of the bottom plate (1), and the bottom of the other positioning shell (2) is symmetrically provided with sliding blocks (16), and the two sliding blocks (16) are slidably installed in the inner cavities of the two guide grooves (3); A mounting ear plate (18) is fixedly mounted on one side of the positioning shell (2) which is slidably connected to the top of the base plate (1); a connecting hole connected to the bottom of the mounting ear plate (18) is formed on the top of the mounting ear plate (18); a fastening bolt (17) is movably mounted in the inner cavity of the connecting hole; and a plurality of fastening holes (4) which are compatible with the fastening bolts (17) are formed on the top of the base plate (1) along the longitudinal direction.

9. A method for detecting the continuity of optical cable metal belts. The optical cable metal tape on-off detection device according to claim 7 is characterized in that: The steps include: A1. After the cable is located between the limit block (6) and the limit strip (5), the two adjacent brake plates (9) are pressed simultaneously until the limit strip (5) is deformed so as to be tightly wrapped around the outside of the cable. Under the action of the limit strip (5), pressure is applied to the outside of the cable so that the cable and the inner wall of the card slot fit tightly together until the curvature of the limit strip (5) is the same as the curvature of the outer wall of the cable, which is conducive to limiting the position of cables of different sizes and preventing the cable cutting unit from bending when cutting into the metal belt; A2. Insert the free end of the cable into the positioning hole until the free end of the cable moves between the two clamping blocks (23) and the two clamping blocks (23) clamp the free end of the cable. Then release the clamping of the outer portion of the cable by the limit assembly and start the drive motor to rotate the reel (8). This helps to neatly wind the cable around the outer portion of the reel (8) and allows the cable to move intermittently, which helps the cable cutting unit to cut into the inner portion of the cable from different positions. The alarm unit can be used to perform multiple tests on a long cable.

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