Tensile strength testing equipment for optical cable sheath

Abstract

The invention relates to the technical field of optical cable sheath tensile testing, in particular to optical cable sheath tensile strength testing equipment which comprises a concave supporting seat, limiting sleeves are symmetrically and fixedly connected to the left inner side wall and the right inner side wall of the concave supporting seat, and a pushing mechanism for testing is installed at the upper end of one side plate of the concave supporting seat. A supporting cylinder is arranged between the two limiting sleeves, regular polygon plates are symmetrically and fixedly installed at the left end and the right end of the supporting cylinder, cylinders are fixedly connected to the sides, away from each other, of the two regular polygon plates, and the two cylinders are rotationally connected with the adjacent limiting sleeves correspondingly. The beneficial effects of the invention are that when one to-be-detected optical cable body is installed, the pushing mechanism can test the tensile strength of the other to-be-detected optical cable body, and meanwhile, the detected optical cable body can be disassembled, so that the waiting time is reduced, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tensile testing of optical cable sheaths, and specifically relates to a tensile strength testing device for optical cable sheaths. Background Art

[0002] The optical cable sheath is the outermost protective layer of the optical cable, usually made of polyethylene, steel or aluminum bonding materials, etc., used to protect the optical cable from physical and chemical damage during laying and transportation, extend the service life of the optical cable, and has characteristics such as waterproof, shear-resistant, and tensile-resistant.

[0003] When the existing tensile strength testing device tests the optical cable sheath, it is necessary to first remove the optical cable after the previous optical cable sheath test is completed, and then install a new optical cable to be tested. During the installation and disassembly process of the optical cable, the device stops working, resulting in a low testing efficiency for the optical cable sheath. Moreover, when the existing tensile strength testing device tests the optical cable sheath, it is necessary to first cut a section of the optical cable and clamp and fix both ends of the optical cable. The cable clamping structure on the existing testing device has a poor clamping effect, and the cable is prone to loosen or even fall off at the clamping position during the test, directly affecting the accuracy of the cable tensile test and being unfavorable for actual testing. Summary of the Invention

[0004] The purpose of the present invention is to provide a tensile strength testing device for optical cable sheaths to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A tensile strength testing device for optical cable sheaths, including a concave support base. Symmetrically and fixedly connected to the left and right inner side walls of the concave support base are limiting sleeves. At the upper end of one side plate of the concave support base, a pushing mechanism for testing is installed. Between the two limiting sleeves, there is a support cylinder. Symmetrically and fixedly installed at the left and right ends of the support cylinder are regular polygon plates. On the side of each of the two regular polygon plates away from each other, a cylinder is fixedly connected. The two cylinders are respectively rotationally connected to the adjacent limiting sleeves. One of the cylinders is driven by the motor shaft of a stepping motor fixedly installed on the side of the concave support base. Inside the support cylinder, a lifting and adjusting mechanism is installed. At one end of the lifting and adjusting mechanism, four lifting components are installed in an annular array. On the sides of the two regular polygon plates, four clamping mechanisms that are convenient for disassembly and assembly are arranged in an annular array. The four clamping mechanisms on the two regular polygon plates are respectively distributed symmetrically left and right in pairs. Between the two clamping mechanisms that are symmetrically distributed left and right, there is an optical cable body.

[0006] As a further solution of the present invention, the pushing mechanism includes an L-shaped support plate fixedly installed at the upper end of a side plate of the concave support base. A T-shaped guiding groove is formed at the upper end of the L-shaped support plate. A hydraulic cylinder is fixedly installed at the upper end inside the L-shaped support plate. The end of the inner rod of the hydraulic cylinder is fixedly installed with a pushing block. A T-shaped guiding block is fixedly installed at the upper end of the pushing block. The T-shaped guiding block is slidably connected to the T-shaped guiding groove left and right. A pressure sensor is fixedly installed on the side of the pushing block.

[0007] As a further solution of the present invention, four positioning bearing plates and four L-shaped bearing plates are respectively fixedly installed on the sides of the two regular polygon plates in a circular array. T-shaped strip plates are fixedly installed on all four L-shaped bearing plates. Four clamping mechanisms on the side of one regular polygon plate are respectively fixedly installed on the four positioning bearing plates. Four clamping mechanisms on the side of the other regular polygon plate are respectively slidably installed left and right on the four L-shaped bearing plates. Four protective baffles are fixedly installed between the two regular polygon plates in a circular array.

[0008] As a further solution of the present invention, the lifting and adjusting mechanism includes a guiding ring fixedly installed on the inner side wall of the support cylinder. A circular tube is inserted through the inside of the guiding ring. One end of the circular tube is fixedly sleeved with a crown gear and an external gear ring in sequence from outside to inside. A plurality of sector-shaped rotating blocks are fixedly connected in a circular array at the end of the circular tube inside the guiding ring. A sector-shaped rotating groove is formed on the outer side surface of each sector-shaped rotating block. The sector-shaped rotating groove is rotationally connected to the guiding ring. A sector-shaped through groove is formed on the side surface of the support cylinder. The sector-shaped through groove is distributed outside the external gear ring. Four lifting components are distributed in a circular array on the side of the crown gear.

[0009] As a further solution of the present invention, the lifting component includes a concave plate fixedly installed on the outer side surface of the support cylinder. The four concave plates in the four lifting components are distributed in a circular array on the outer side surface of the support cylinder. The sector-shaped through groove is located below the inside of one concave plate. A rectangular tube is fixedly installed on the outer side surface of the concave plate. A circular shaft is rotationally installed inside the rectangular tube on the outer side surface of the concave plate. One end of the circular shaft passes through the concave plate and the support cylinder in sequence and extends into the inner cavity of the support cylinder. The end of the circular shaft inside the inner cavity of the support cylinder is fixedly connected with a main gear. The main gear meshes with the crown gear; One end of the circular shaft away from the crown gear is fixedly connected with an adjusting screw rod. The adjusting screw rod is arranged inside the rectangular tube. A rectangular support column is slidably installed inside the rectangular tube. A threaded groove is formed at the end of the rectangular support column close to the concave plate. The adjusting screw rod is threadedly connected to the threaded groove. The end of the rectangular support column away from the concave plate is fixedly installed with a U-shaped limiting seat. The optical cable body is arranged through the inside of the U-shaped limiting seat. A locking mechanism is installed on the concave plate. The locking mechanism is arranged above the sector-shaped through groove.

[0010] As a further solution of the present invention, the locking mechanism includes a locking bolt threadedly installed on the outer side of the concave plate. One end of the locking bolt passes through the concave plate and extends to its inner side. One end of the locking bolt inside the concave plate is rotatably installed with a locking tooth block through a pin shaft. On one side of the locking tooth block close to the locking bolt, sliding plates are symmetrically and fixedly installed. One end of the sliding plate away from the locking tooth block penetrates the concave plate, and the sliding plate is slidably connected to the concave plate. The side of the locking tooth block with teeth penetrates the fan-shaped through groove and is clamped with the external tooth ring.

[0011] As a further solution of the present invention, the clamping mechanism includes a bottom plate arranged on the side of the regular polygon plate. On the side of the bottom plate away from the regular polygon plate, a bending guide wheel and two U-shaped clamping bases are successively fixedly installed. On one side of one of the U-shaped clamping bases, there is a fixed block fixedly connected to the bottom plate. On one side of the other U-shaped clamping base, there is a positioning plate fixedly connected to the bottom plate. The upper end of the positioning plate is rotatably installed with an upper cover plate through a rotating shaft. On the side of the upper cover plate close to the U-shaped clamping base, clamping components are symmetrically installed. The two clamping components are respectively arranged above the inner sides of the two U-shaped clamping bases. Inside the upper cover plate, a locking mechanism is installed on the side of the clamping component; The positioning and bearing plate is fixedly connected to the adjacent bottom plate. At the lower end of the bottom plate above the L-shaped bearing plate, a T-shaped limiting groove is opened. The T-shaped limiting groove is slidably connected to the T-shaped strip plate left and right. On the side of the bottom plate above the L-shaped bearing plate, a resisting block is fixedly connected; One end of the optical cable body penetrates the inside of one U-shaped clamping base and extends near the bending guide wheel. One end of the optical cable body is bent in a U shape along the bending guide wheel and then passes through the inside of the other U-shaped clamping base; On the side of the upper cover plate close to the fixed block, a fan-shaped insertion block is fixedly installed. On the outside of the fan-shaped insertion block, a card slot is opened. On the side of the fixed block close to the upper cover plate, a fan-shaped insertion slot is opened. On the side of the fan-shaped insertion slot, a groove is opened. The side of the groove penetrates outward to form a threaded hole. The fan-shaped insertion block is inserted into the fan-shaped insertion slot, and a locking mechanism is installed in the fixed block.

[0012] As a further solution of the present invention, the locking mechanism includes a locking block slidably installed in the groove. The locking block on the door lock is clamped with the card slot. On one side of the locking block close to the fan-shaped insertion block, an extrusion inclined surface is opened. On the side of the locking block away from the fan-shaped insertion block, locking springs are symmetrically inserted. On the side of the locking block, a concave block is fixedly installed between the two locking springs. One end of the locking spring away from the locking block abuts against the groove. A round rod is penetrated in the threaded hole. One end of the round rod outside the fixed block is fixedly connected with a fastening screw. One end of the round rod inside the groove penetrates the side of the concave block and extends to its inner side. One end of the round rod inside the concave block is fixedly connected with a pressing round block. The round rod is slidably connected to the concave block.

[0013] As a further solution of the present invention, a plurality of lifting grooves are symmetrically formed on the side surface of the upper cover plate, circular grooves are symmetrically formed on the side surface of the upper cover plate, annular grooves are formed on the inner sides of the two circular grooves, a concave groove is formed on the inner side of the upper cover plate, and both ends of the concave groove are communicated with the two annular grooves respectively; The clamping assembly includes an internally threaded sleeve rotatably installed in the circular groove. The internally threaded sleeve penetrates through the circular groove. An adjusting sleeve, a limiting gear ring and a rotating ring are sequentially and fixedly sleeved on the outer side of the internally threaded sleeve from top to bottom. The limiting gear ring is rotatably connected with the annular groove. The adjusting sleeve and the rotating ring are respectively in rotational contact with the upper and lower sides of the upper cover plate. A lifting screw rod is installed through the inner side of the internally threaded sleeve. The lower end of the lifting screw rod is fixedly connected with an upper clamping plate. Lifting plates are symmetrically and fixedly connected to the side of the upper clamping plate close to the upper cover plate. The locking mechanism is arranged in the concave groove; The lifting screw rod is in threaded connection with the internally threaded sleeve. The lifting plate is slidably connected with the lifting groove. Anti-slip grooves are formed at the clamping parts of the upper clamping plate and the bottom of the inner side of the U-shaped clamping base.

[0014] As a further solution of the present invention, the locking mechanism includes a transmission plate slidably installed in the concave groove. Locking tooth blocks are symmetrically and fixedly connected to the side of the transmission plate close to the limiting gear ring. The two locking tooth blocks are respectively clamped with the two limiting gear rings. Elastic sheets are symmetrically and fixedly installed on the side of the transmission plate away from the locking tooth blocks. A pull rod is slidably inserted into the side surface of the upper cover plate. One end of the pull rod passes through the upper cover plate and extends into the concave groove. The end of the pull rod in the concave groove is fixedly connected with the transmission plate.

[0015] The beneficial effects of the present invention are: 1. When installing an optical cable body to be detected, the pushing mechanism can perform a tensile strength test on another optical cable body to be detected, and at the same time can disassemble the detected optical cable body, reducing the waiting time and greatly improving the work efficiency.

[0016] 2. Pass one end of the optical cable body through the inner side of a U-shaped clamping base, make the optical cable body bend into a U shape along the bending guide wheel and then pass through the inner side of another U-shaped clamping base, so that the optical cable body is stuck inside the two U-shaped clamping bases, and the optical cable body contacts the bottom of the U-shaped clamping base; at this time, flip the upper cover plate and clamp it above the U-shaped clamping base. The upper cover plate drives the two clamping assemblies to be respectively clamped into the two U-shaped clamping bases. At the same time, the upper clamping plate in the clamping assembly is clamped on the optical cable body. The optical cable body is clamped and fixed by the cooperation of the upper clamping plate and the U-shaped clamping base; the sector-shaped insertion block is locked through the locking mechanism, so that the clamping assembly and the U-shaped clamping base can firmly clamp and fix the optical cable body, preventing the optical cable body from loosening or falling off during the detection process.

[0017] 3. By folding the end of the optical cable body and then clamping and fixing it, the contact surface between the optical cable body and the clamping mechanism is increased, thereby increasing the friction force and preventing the optical cable body from being misaligned, sliding or falling off during the test of the optical cable body.

[0018] 4. After the detection of the optical cable body is completed, first release the locking of the sector-shaped insert block by the locking mechanism, then flip the upper cover plate upwards to open it, and release the fixing of the optical cable body by the clamping assembly, thereby completing the disassembly of the optical cable body; when it is necessary to clamp and fix optical cable bodies of different thicknesses, first release the locking of the limit tooth ring by the locking mechanism, and by rotating the adjusting sleeve, make the lifting screw rod drive the upper clamping plate to move closer to or away from the U-shaped clamping base, so as to adjust the distance between the clamping part of the upper clamping plate and the inner bottom of the U-shaped clamping base, and thus be able to clamp and fix optical cable bodies of different thicknesses; after the adjustment is completed, lock the limit tooth ring by the locking mechanism, so that the clamping assembly and the U-shaped clamping base can firmly clamp and fix the optical cable body. Description of the Drawings

[0019] Figure 1 is a three-dimensional view of the structure of the optical cable sheath tensile strength testing equipment of the present invention; Figure 2 is a cross-sectional view of the structure of the optical cable sheath tensile strength testing equipment of the present invention; Figure 3 is Figure 2 a schematic enlarged view of the structure at A in Figure 4 is an exploded view of the structure of the support cylinder, the lifting adjustment mechanism and the lifting assembly of the present invention; Figure 5 is a three-dimensional view of the structure of the regular polygon plate, the L-shaped bearing plate, the T-shaped strip plate and the clamping mechanism of the present invention; Figure 6 is a cross-sectional view of the structure of the U-shaped clamping base, the upper cover plate and the clamping assembly of the present invention; Figure 7 is a cross-sectional view of the structure of the clamping mechanism of the present invention; Figure 8 is a transverse cross-sectional view of a partial structure of the clamping mechanism of the present invention; Figure 9 is an exploded view of the structure of the clamping mechanism of the present invention.

[0020] In the figure: 1. Concave support base; 11. Limit sleeve; 12. L-shaped support plate; 13. T-shaped guide groove; 14. Hydraulic cylinder; 15. Pusher block; 16. T-shaped guide block; 17. Pressure sensor; 2. Support cylinder; 21. Regular polygon plate; 22. Cylinder; 23. Sector-shaped through groove; 24. Guide ring; 25. Positioning and bearing plate; 26. L-shaped bearing plate; 27. T-shaped strip plate; 28. Protective baffle; 3. Circular tube; 31. Crown gear; 32. External tooth ring; 321. Locking bolt; 322. Locking tooth block; 323. Slide plate; 33. Sector-shaped rotating block; 34. Sector-shaped rotating groove; 4. Concave plate; 41. Rectangular cylinder; 42. Circular shaft; 43. Main gear; 44. Adjusting screw; 45. Rectangular support column; 46. Thread groove; 47. U-shaped limit seat; 5. Bottom plate; 51. Block; 52. Bent guide wheel; 53. U-shaped clamping base; 54. Fixed block; 55. Sector-shaped slot; 56. Groove; 57. Threaded hole; 58. Optical cable body; 6. Upper cover plate; 61. Lifting groove; 62. Circular groove; 63. Annular groove; 64. Concave groove; 65. Sector-shaped insert block; 66. Card slot; 7. Internal thread sleeve; 71. Adjusting sleeve; 72. Limit tooth ring; 73. Rotating ring; 74. Lifting screw; 75. Upper clamping plate; 76. Lifting plate; 8. Locking block; 81. Locking spring; 82. Concave block; 83. Fastening screw; 84. Round rod; 85. Pressing round block; 9. Transmission plate; 91. Locking tooth block; 92. Elastic sheet; 93. Pull rod. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 9, the present invention provides a technical solution: a tensile strength testing device for an optical cable sheath, which includes a concave support base 1. On the left and right inner side walls of the concave support base 1, limiting sleeves 11 are symmetrically and fixedly connected. At the upper end of one side plate of the concave support base 1, a pushing mechanism for testing is installed. Between the two limiting sleeves 11, there is a support cylinder 2. At the left and right ends of the support cylinder 2, regular polygon plates 21 are symmetrically and fixedly installed. On the side of each of the two regular polygon plates 21 away from each other, a cylinder 22 is fixedly connected. The two cylinders 22 are respectively rotatably connected to the adjacent limiting sleeves 11. The two cylinders 22 are respectively inserted into the adjacent limiting sleeves 11. At the ends of the two cylinders 22 away from each other, they are respectively rotatably connected to the two side plates of the concave support base 1 through bearings. One of the cylinders 22 is driven by the motor shaft of a stepping motor fixedly installed on the side of the concave support base 1. An elevating and adjusting mechanism is installed inside the support cylinder 2. At one end of the elevating and adjusting mechanism, four elevating components are installed in an annular array; On the sides of the two regular polygon plates 21, four detachable clamping mechanisms are arranged in an annular array. The four clamping mechanisms on the two regular polygon plates 21 are distributed symmetrically in pairs left and right. Between the two clamping mechanisms symmetrically distributed left and right, there is an optical cable body 58.

[0023] The motor shaft of the stepping motor rotates intermittently. Each time the motor shaft of the stepping motor rotates, it drives the cylinder 22 to rotate 90 degrees. The cylinder 22 drives the regular polygon plate 21 to rotate 90 degrees. The regular polygon plate 21 drives the other regular polygon plate 21 to rotate 90 degrees synchronously through the support cylinder 2; The cylinder 22 rotates along the concave support base 1 and at the same time rotates along the limiting sleeve 11, so that the cylinder 22 can drive the regular polygon plate 21 to rotate stably; The two regular polygon plates 21 respectively drive the four clamping mechanisms on them to rotate 90 degrees synchronously. When the clamping mechanisms move, they drive the optical cable body 58 to rotate synchronously, so as to move the optical cable body 58 below the pushing mechanism, enabling the pushing mechanism to perform tensile testing on the optical cable body 58.

[0024] Please refer to Figure 1 and Figure 2 , the pushing mechanism includes an L-shaped support plate 12 fixedly installed at the upper end of one side plate of the concave support base 1. At the upper end of the L-shaped support plate 12, a T-shaped guide groove 13 is opened. At the upper end inside the L-shaped support plate 12, a hydraulic cylinder 14 is fixedly installed. At the end of the inner rod of the hydraulic cylinder 14, a push block 15 is fixedly installed. At the upper end of the push block 15, a T-shaped guide block 16 is fixedly installed. The T-shaped guide block 16 is slidably connected left and right with the T-shaped guide groove 13. On the side of the push block 15, a pressure sensor 17 is fixedly installed.

[0025] A controller is fixedly installed on the outer side of the L-shaped support plate 12, and a touch screen is installed on the controller. When a tensile strength test is required, the inner rod of the hydraulic cylinder 14 extends to drive the push block 15 to move. The push block 15 drives the T-shaped guide block 16 to slide along the T-shaped guide groove 13. The push block 15 drives the pressure sensor 17 to move closer to the clamping mechanism, thereby pushing the clamping mechanism to move, so that the clamping mechanism drives one end of the optical cable body 58 to move, so as to perform a tensile test on the optical cable body 58. The pressure sensor 17 can monitor the tensile force on the optical cable body 58 in real time.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 5 , four positioning bearing plates 25 and four L-shaped bearing plates 26 are respectively fixedly installed on the sides of the two regular polygon plates 21 in a circumferential array. The L-shaped bearing plates 26 are arranged below the pushing mechanism. T-shaped strip plates 27 are fixedly installed on the four L-shaped bearing plates 26. Four clamping mechanisms on the side of one regular polygon plate 21 are respectively fixedly installed on the four positioning bearing plates 25, and four clamping mechanisms on the side of the other regular polygon plate 21 are respectively slidably installed left and right on the four L-shaped bearing plates 26. Four protective baffles 28 are fixedly installed between the two regular polygon plates 21 in a circumferential array.

[0027] The four clamping mechanisms on the two regular polygon plates 21 are all mirror-symmetrically distributed, and the clamping mechanisms at both ends of the support cylinder 2 correspond one by one; the two regular polygon plates 21 are separated into four regions by the four protective baffles 28, and the two clamping mechanisms are symmetrically distributed left and right at both ends of one region.

[0028] Please refer to Figures 1 to 4 , the lifting and adjusting mechanism includes a guide ring 24 fixedly installed on the inner side wall of the support cylinder 2. A circular tube 3 is inserted through the inside of the guide ring 24. A crown gear 31 and an external tooth ring 32 are fixedly sleeved on one end of the circular tube 3 from outside to inside in sequence. A plurality of sector-shaped rotating blocks 33 are fixedly connected in a circumferential array at one end of the circular tube 3 inside the guide ring 24. A sector-shaped rotating groove 34 is opened on the outer side surface of each sector-shaped rotating block 33, and the sector-shaped rotating groove 34 is rotationally connected with the guide ring 24. A sector-shaped through groove 23 is opened on the side surface of the support cylinder 2, and the sector-shaped through groove 23 is distributed outside the external tooth ring 32. The four lifting components are distributed in a circumferential array on the side surface of the crown gear 31.

[0029] The external tooth ring 32 can be rotationally adjusted through the sector-shaped through groove 23. When the external tooth ring 32 rotates forward or backward, it drives the circular tube 3 to rotate forward or backward. The circular tube 3 drives the crown gear 31 and the sector-shaped rotating blocks 33 to rotate synchronously. At this time, the sector-shaped rotating groove 34 on the sector-shaped rotating block 33 rotates along the guide ring 24, so that the circular tube 3 and the crown gear 31 can rotate stably.

[0030] The lifting assembly includes a concave plate 4 fixedly installed on the outer side of the support cylinder 2. The four concave plates 4 in the four lifting assemblies are distributed in an annular array on the outer side of the support cylinder 2. The fan-shaped through groove 23 is located below the inner side of one concave plate 4. A rectangular cylinder 41 is fixedly installed on the outer side of the concave plate 4. A round shaft 42 is rotatably installed on the outer side of the concave plate 4 inside the rectangular cylinder 41. One end of the round shaft 42 sequentially passes through the concave plate 4 and the support cylinder 2 and extends into the inner cavity of the support cylinder 2. One end of the round shaft 42 in the inner cavity of the support cylinder 2 is fixedly connected with a main gear 43, and the main gear 43 meshes with the crown gear 31; One end of the round shaft 42 far from the crown gear 31 is fixedly connected with an adjusting screw rod 44. The adjusting screw rod 44 is arranged in the inner cavity of the rectangular cylinder 41. The round shaft 42 is respectively rotatably connected with the support cylinder 2 and the concave plate 4. A limit ring is fixedly sleeved on the round shaft 42. The limit ring and the adjusting screw rod 44 are distributed on the inner and outer sides of the concave plate 4, and both the limit ring and the adjusting screw rod 44 are in rotational contact with the concave plate 4. The round shaft 42 can rotate stably through the limit ring and the adjusting screw rod 44; A rectangular support column 45 is slidably installed in the rectangular cylinder 41. A threaded groove 46 is opened at one end of the rectangular support column 45 close to the concave plate 4. The adjusting screw rod 44 is threadedly connected with the threaded groove 46. One end of the rectangular support column 45 far from the concave plate 4 is fixedly installed with a U-shaped limit seat 47. The optical cable body 58 is arranged through the inner side of the U-shaped limit seat 47. A locking mechanism is installed on the concave plate 4, and the locking mechanism is arranged above the fan-shaped through groove 23.

[0031] When the crown gear 31 rotates forward or backward, the crown gear 31 drives the four main gears 43 on its side to rotate synchronously. When the main gear 43 rotates, it drives the adjusting screw rod 44 to rotate through the round shaft 42, and the adjusting screw rod 44 rotates along the threaded groove 46; The rectangular support column 45 slides inwards or outwards along the rectangular cylinder 41 through the adjusting screw rod 44. The rectangular support column 45 drives the U-shaped limit seat 47 to move closer to or away from the rectangular cylinder 41. The optical cable body 58 is pushed by the U-shaped limit seat 47 to bend, so that the optical cable body 58 can be subjected to a tensile strength test under the bending condition, thereby meeting the test requirements for different conditions of the optical cable body 58.

[0032] Please refer to Figures 2 to 4, the locking mechanism includes a locking bolt 321 threadedly installed on the outer side of the concave plate 4. One end of the locking bolt 321 passes through the concave plate 4 and extends to its inner side. One end of the locking bolt 321 inside the concave plate 4 is rotatably installed with a locking tooth block 322 through a pin shaft. On one side of the locking tooth block 322 close to the locking bolt 321, sliding plates 323 are symmetrically and fixedly installed. One end of the sliding plate 323 away from the locking tooth block 322 penetrates the concave plate 4, and the sliding plate 323 is slidably connected to the concave plate 4. The side of the locking tooth block 322 provided with teeth penetrates the fan-shaped through groove 23 and is engaged with the external tooth ring 32.

[0033] When it is necessary to rotate the external tooth ring 32, the locking bolt 321 is screwed outwards along the concave plate 4. The locking bolt 321 drives the locking tooth block 322 to move away from the external tooth ring 32. The locking tooth block 322 drives the sliding plate 323 to slide along the concave plate 4, so that the locking tooth block 322 can move stably, and the locking mechanism releases the locking of the external tooth ring 32. When it is necessary to lock the external tooth ring 32, the locking bolt 321 is screwed inwards along the concave plate 4. The locking bolt 321 drives the locking tooth block 322 to move close to the external tooth ring 32 until the locking tooth block 322 is engaged with the external tooth ring 32, and the locking mechanism locks the external tooth ring 32.

[0034] Please refer to Figure 2 , Figures 5 to 9 , the clamping mechanism includes a bottom plate 5 arranged on the side of the regular polygon plate 21. On the side of the bottom plate 5 away from the regular polygon plate 21, a bent guide wheel 52 and two U-shaped clamping bases 53 are successively fixedly installed. The two U-shaped clamping bases 53 are closely attached to each other. On one side of one U-shaped clamping base 53, there is a fixed block 54 which is fixedly connected to the bottom plate 5. On one side of the other U-shaped clamping base 53, there is a positioning plate which is fixedly connected to the bottom plate 5. The upper end of the positioning plate is rotatably installed with an upper cover plate 6 through a rotating shaft. On the side of the upper cover plate 6 close to the U-shaped clamping base 53, clamping components are symmetrically installed. The two clamping components are respectively arranged above the inner sides of the two U-shaped clamping bases 53. Inside the upper cover plate 6, a locking mechanism is installed on the side of the clamping component. The positioning and bearing plate 25 is fixedly connected to the adjacent bottom plate 5. At the lower end of the bottom plate 5 above the L-shaped bearing plate 26, a T-shaped limiting groove is opened. The T-shaped limiting groove is slidably connected to the T-shaped strip plate 27 in the left-right direction. On the side of the bottom plate 5 above the L-shaped bearing plate 26, a resisting block 51 is fixedly connected. The resisting block 51 and the bent guide wheel 52 are on the same side of the bottom plate 5. One end of the optical cable body 58 penetrates the inside of one U-shaped clamping base 53 and extends near the bent guide wheel 52. One end of the optical cable body 58 is bent in a U shape along the bent guide wheel 52 and then passes through the inside of the other U-shaped clamping base 53. On one side of the upper cover plate 6 close to the fixed block 54, a sector-shaped insertion block 65 is fixedly installed. A card slot 66 is formed on the outer surface of the sector-shaped insertion block 65. A sector-shaped insertion slot 55 is formed on one side of the fixed block 54 close to the upper cover plate 6. A groove 56 is formed on the side surface of the sector-shaped insertion slot 55. A threaded hole 57 runs through the side surface of the groove 56 to the outside. The sector-shaped insertion block 65 is inserted into the sector-shaped insertion slot 55, and a locking mechanism is installed in the fixed block 54.

[0035] The optical cable body 58 is arranged between the U-shaped clamping base 53 and the clamping assembly, and the optical cable body 58 is clamped and fixed by the cooperation of the U-shaped clamping base 53 and the clamping assembly.

[0036] When detecting the optical cable body 58, the push block 15 drives the pressure sensor 17 to move close to the abutting block 51. When the pressure sensor 17 contacts the abutting block 51, the push block 15 continues to drive the pressure sensor 17 to move. The pressure sensor 17 pushes the abutting block 51 to move. The abutting block 51 drives the bottom plate 5 to slide along the L-shaped bearing plate 26. At the same time, the T-shaped limiting groove at the lower end of the bottom plate 5 slides along the T-shaped strip 27, so that the bottom plate 5 can move stably. At this time, the bottom plate 5 drives the U-shaped clamping base 53 and the clamping assembly thereon to move synchronously. The U-shaped clamping base 53 and the clamping assembly drive one end of the optical cable body 58 to move, so as to realize the tensile strength test of the optical cable body 58.

[0037] Please refer to Figures 7 to 9 The locking mechanism includes a locking block 8 slidably installed in the groove 56. The locking block 8 on the door locks is clamped with the card slot 66. An extrusion inclined surface is formed on one side of the locking block 8 close to the sector-shaped insertion block 65. Symmetrically inserted on the side of the locking block 8 far from the sector-shaped insertion block 65 are locking springs 81. A concave block 82 is fixedly installed on the side surface of the locking block 8 between the two locking springs 81. The end of the locking spring 81 far from the locking block 8 abuts against the groove 56. A round rod 84 runs through the threaded hole 57. One end of the round rod 84 outside the fixed block 54 is fixedly connected with a fastening screw 83. The fastening screw 83 is adapted to the threaded hole 57. The round rod 84 can slide inwards or outwards along the threaded hole 57. One end of the round rod 84 in the groove 56 runs through the side surface of the concave block 82 and extends to its inner side. One end of the round rod 84 inside the concave block 82 is fixedly connected with a pressing round block 85. The round rod 84 is slidably connected with the concave block 82.

[0038] When the fastening screw 83 is screwed outwards along the threaded hole 57, the fastening screw 83 is separated from the threaded hole 57. At this time, one end of the round rod 84 is in the threaded hole 57, and the other end of the round rod 84 drives the pressing round block 85 to contact one side surface inside the concave block 82; At this time, pull the fastening screw 83 away from the fixed block 54. The fastening screw 83 drives the pressing round block 85 to move synchronously through the round rod 84. The pressing round block 85 drives the concave block 82 to move into the groove 56. The concave block 82 drives the locking block 8 to move into the groove 56. At the same time, the locking block 8 is moved out of the card slot 66, so that the locking mechanism releases the locking of the sector-shaped insertion block 65. At this time, the upper cover plate 6 can be turned upwards to open. The upper cover plate 6 drives the clamping assembly away from the U-shaped clamping base 53, so as to release the clamping and fixing of the optical cable body 58.

[0039] When it is necessary to clamp and fix the optical cable body 58, first insert the optical cable body 58 into the inner side of the U-shaped clamping base 53. At this time, the fastening screw 83 is screwed outwards along the threaded hole 57, and the fastening screw 83 is separated from the threaded hole 57. Turn the upper cover plate 6 downwards. The upper cover plate 6 drives the clamping assembly to be inserted into the U-shaped clamping base 53. The optical cable body 58 is clamped and fixed by the cooperation of the U-shaped clamping base 53 and the clamping assembly. When the upper cover plate 6 is turned downwards, it drives the sector-shaped insertion block 65 to be inserted into the sector-shaped slot 55. When the sector-shaped insertion block 65 contacts the extrusion inclined surface on the side of the locking block 8, the sector-shaped insertion block 65 continues to move downwards. The sector-shaped insertion block 65 pushes the locking block 8 to move into the groove 56. At this time, the locking block 8 presses the locking spring 81. After the sector-shaped insertion block 65 is completely inserted into the sector-shaped slot 55, at this time, the lower side surface of the upper cover plate 6 contacts the upper side surface of the fixed block 54. At this time, the card slot 66 moves to the side of the locking block 8, and the card slot 66 is aligned with the locking block 8. Under the action of the elastic force of the locking spring 81, the locking block 8 is clamped with the card slot 66, so as to lock the sector-shaped insertion block 65, so that the sector-shaped insertion block 65 cannot be moved upwards out of the sector-shaped slot 55, and further the upper cover plate 6 cannot be turned upwards to open, so that the clamping assembly can firmly clamp and fix the optical cable body 58. At this time, screw the fastening screw 83 into the threaded hole 57 again. The fastening screw 83 drives the round rod 84 to slide inwards along the concave block 82. The round rod 84 drives the pressing round block 85 to move close to the locking block 8 until the pressing round block 85 abuts against the side surface of the locking block 8, so that the locking block 8 can be firmly clamped with the card slot 66, preventing loosening or falling off between the locking block 8 and the card slot 66.

[0040] Please refer to Figures 6 to 9, a plurality of lifting grooves 61 are symmetrically formed on the side surface of the upper cover plate 6, and circular grooves 62 are symmetrically formed on the side surface of the upper cover plate 6. When the upper cover plate 6 is located above the U-shaped clamping base 53, the lifting grooves 61 are symmetrically distributed above the U-shaped clamping base 53, and the two circular grooves 62 are respectively located above the two U-shaped clamping bases 53. Annular grooves 63 are formed on the inner sides of the two circular grooves 62, a concave groove 64 is formed on the inner side of the upper cover plate 6, and both ends of the concave groove 64 communicate with the two annular grooves 63 respectively. The upper cover plate 6 is formed by splicing two flat plates that are symmetrically arranged up and down; The clamping assembly includes an internally threaded sleeve 7 rotatably installed in the circular groove 62. The internally threaded sleeve 7 penetrates through the circular groove 62. An adjusting sleeve 71, a limiting gear ring 72 and a rotating ring 73 are fixedly sleeved on the outer side of the internally threaded sleeve 7 in sequence from top to bottom. The limiting gear ring 72 is rotatably connected with the annular groove 63. The adjusting sleeve 71 and the rotating ring 73 are respectively in rotational contact with the upper and lower sides of the upper cover plate 6. A lifting screw rod 74 is installed through the inner side of the internally threaded sleeve 7. The lower end of the lifting screw rod 74 is fixedly connected with an upper clamping plate 75. Lifting plates 76 are symmetrically fixedly connected to the side of the upper clamping plate 75 close to the upper cover plate 6. A locking mechanism is arranged in the concave groove 64; The lifting screw rod 74 is in threaded connection with the internally threaded sleeve 7. The lifting plate 76 is slidably connected with the lifting groove 61. Anti-slip grooves are formed on the clamping part of the upper clamping plate 75 and the bottom of the inner side of the U-shaped clamping base 53.

[0041] When clamping and fixing the optical cable body 58, through the anti-slip grooves arranged in the upper clamping plate 75 and the U-shaped clamping base 53, the upper clamping plate 75 and the U-shaped clamping base 53 cooperate to firmly clamp and fix the optical cable body 58.

[0042] When it is necessary to clamp and fix optical cable bodies 58 with different thicknesses, by rotating the adjusting sleeve 71 forward or backward, the adjusting sleeve 71 drives the internally threaded sleeve 7 to rotate along the circular groove 62, and the internally threaded sleeve 7 drives the rotating ring 73 to rotate synchronously. The position of the internally threaded sleeve 7 is restricted by the cooperation of the arranged adjusting sleeve 71 and the rotating ring 73, so that the internally threaded sleeve 7 can rotate stably along the circular groove 62; When the internally threaded sleeve 7 rotates, the lifting screw rod 74 moves along the inner side of the internally threaded sleeve 7. The lifting screw rod 74 drives the upper clamping plate 75 to move closer to or away from the U-shaped clamping base 53, so as to adjust the distance between the clamping part of the upper clamping plate 75 and the bottom of the inner side of the U-shaped clamping base 53, and further be able to clamp and fix optical cable bodies 58 with different thicknesses.

[0043] The locking mechanism includes a transmission plate 9 slidably installed in the concave groove 64. On one side of the transmission plate 9 close to the limit gear ring 72, locking teeth 91 are symmetrically and fixedly connected. The two locking teeth 91 are respectively engaged with the two limit gear rings 72. On the side of the transmission plate 9 away from the locking teeth 91, elastic pieces 92 are symmetrically and fixedly installed. A pull rod 93 is slidably inserted into the side surface of the upper cover plate 6. One end of the pull rod 93 passes through the upper cover plate 6 and extends into the concave groove 64. The end of the pull rod 93 in the concave groove 64 is fixedly connected to the transmission plate 9.

[0044] When it is necessary to rotate the adjusting sleeve 71, first pull the pull rod 93 outwards along the upper cover plate 6. The pull rod 93 drives the transmission plate 9 to move away from the limit gear ring 72. The transmission plate 9 drives the locking teeth 91 to move away from the limit gear ring 72, so that the locking teeth 91 release the locking of the limit gear ring 72. At the same time, the transmission plate 9 presses the elastic piece 92; When it is necessary to lock the limit gear ring 72, release the pull rod 93. Under the action of the elastic force of the elastic piece 92, the transmission plate 9 moves close to the limit gear ring 72. The transmission plate 9 drives the locking teeth 91 to be engaged with the limit gear ring 72, thereby completing the locking of the limit gear ring 72, and further making the internal thread sleeve 7 unable to rotate.

[0045] Working principle: When it is necessary to conduct a tensile strength test on the optical cable body 58, both ends of the optical cable body 58 are installed on two symmetrically arranged clamping mechanisms on the side. At this time, these two clamping mechanisms are on the side of the concave support base 1. When clamping, first pass one end of the optical cable body 58 through the inside of a U-shaped clamping base 53, make the optical cable body 58 bend into a U shape along the bending guide wheel 52 and then pass through the inside of another U-shaped clamping base 53, so that the optical cable body 58 is stuck inside the two U-shaped clamping bases 53, and the optical cable body 58 contacts the bottom of the U-shaped clamping base 53; At this time, flip the upper cover plate 6 and clamp it above the U-shaped clamping base 53. The upper cover plate 6 drives the two clamping components to be respectively clamped into the two U-shaped clamping bases 53. At the same time, the upper clamping plate 75 in the clamping component is clamped on the optical cable body 58, and the optical cable body 58 is clamped and fixed by the cooperation of the upper clamping plate 75 and the U-shaped clamping base 53; When the upper cover plate 6 is flipped downwards, it drives the fan-shaped insert block 65 to insert into the fan-shaped slot 55. When the fan-shaped insert block 65 is completely inserted into the fan-shaped slot 55, at this time, the lower side surface of the upper cover plate 6 contacts the upper side surface of the fixed block 54. Under the action of the elastic force of the locking spring 81, the locking block 8 is engaged with the card slot 66, thereby locking the fan-shaped insert block 65; At this time, screw the fastening screw 83 inward along the threaded hole 57. The fastening screw 83 drives the round rod 84 to slide inward along the concave block 82. The round rod 84 drives the pressing round block 85 to move closer to the locking block 8 until the pressing round block 85 abuts against the side surface of the locking block 8, so that the locking block 8 can be firmly clamped with the clamping groove 66. At this time, the upper cover plate 6 remains relatively stationary with the fixed block 54 and the U-shaped clamping base 53 respectively. The clamping assembly and the U-shaped clamping base 53 cooperate to firmly clamp and fix the optical cable body 58, preventing the optical cable body 58 from loosening or falling off during the detection process.

[0046] Clamp and fix both ends of the optical cable body 58 according to the above operations. At the same time, the optical cable body 58 passes through the inside of the U-shaped limiting seat 47, and the optical cable body 58 is in a taut state.

[0047] By folding the end of the optical cable body 58 and then clamping and fixing it, the contact surface between the optical cable body 58 and the middle of the clamping mechanism is increased, thereby increasing the friction force and preventing the optical cable body 58 from being displaced, sliding or falling off when testing the optical cable body 58.

[0048] After clamping and fixing both ends of the optical cable body 58, rotate the motor shaft of the stepping motor once, so that the motor shaft drives the cylinder 22 to rotate 90 degrees. The cylinder 22 drives the regular polygon plate 21 to rotate 90 degrees. The regular polygon plate 21 drives another regular polygon plate 21 to rotate 90 degrees synchronously through the support cylinder 2. The two regular polygon plates 21 respectively drive the four clamping mechanisms on them to rotate 90 degrees synchronously. At this time, the optical cable body 58 just installed by the clamping mechanism rotates to directly below the pushing mechanism.

[0049] The inner rod of the hydraulic cylinder 14 extends to drive the push block 15 to move. The push block 15 drives the pressure sensor 17 to move closer to the abutting block 51. When the pressure sensor 17 contacts the abutting block 51, the push block 15 continues to drive the pressure sensor 17 to move. The pressure sensor 17 pushes the abutting block 51 to move. The abutting block 51 drives the bottom plate 5 to move synchronously. The bottom plate 5 drives the U-shaped clamping base 53 and the clamping assembly on it to move synchronously. The U-shaped clamping base 53 and the clamping assembly drive one end of the optical cable body 58 to move, so as to realize the tensile strength test of the optical cable body 58.

[0050] After the inspection of the optical cable body 58 is completed, the motor shaft of the stepping motor rotates once again. The motor shaft drives the cylinder 22 to rotate by 90 degrees, causing the inspected optical cable body 58 to rotate backward. The inspected optical cable body 58 is rotated to the rear side of the concave support base 1. At this time, the optical cable body 58 can be disassembled. First, the locking mechanism releases the locking of the sector-shaped insert block 65, and then the upper cover plate 6 is turned upward to open. The clamping assembly releases the fixation of the optical cable body 58, thereby completing the disassembly of the optical cable body 58. While disassembling the inspected optical cable body 58, the pushing mechanism can perform a tensile strength test on the optical cable body 58 to be inspected, and at the same time can install another optical cable body 58 to be inspected, greatly improving the work efficiency.

[0051] When it is necessary to clamp and fix optical cable bodies 58 of different thicknesses, first, the locking mechanism releases the locking of the limit gear ring 72. By rotating the adjusting sleeve 71, the adjusting sleeve 71 drives the internal thread sleeve 7 to rotate, causing the lifting screw rod 74 to move along the inside of the internal thread sleeve 7. The lifting screw rod 74 drives the upper clamping plate 75 to move closer to or away from the U-shaped clamping base 53, thereby adjusting the distance between the clamping portion of the upper clamping plate 75 and the inner bottom of the U-shaped clamping base 53, and then being able to clamp and fix optical cable bodies 58 of different thicknesses. After the adjustment is completed, the locking mechanism locks the limit gear ring 72, thereby preventing the internal thread sleeve 7 from rotating, preventing the lifting screw rod 74 and the upper clamping plate 75 from moving closer to or away from the U-shaped clamping base 53, and enabling the clamping assembly and the U-shaped clamping base 53 to firmly clamp and fix the optical cable body 58.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical cable sheath tensile strength testing device, including a concave support base (1), characterized in that: On the left and right inner side walls of the concave support base (1), limiting sleeves (11) are symmetrically and fixedly connected. A pushing mechanism for testing is installed at the upper end of one side plate of the concave support base (1). A support cylinder (2) is arranged between the two limiting sleeves (11). Regular polygon plates (21) are symmetrically and fixedly installed at the left and right ends of the support cylinder (2). Cylinders (22) are fixedly connected to the sides of the two regular polygon plates (21) that are away from each other. The two cylinders (22) are respectively rotatably connected to the adjacent limiting sleeves (11). One of the cylinders (22) is driven by the motor shaft of a stepping motor fixedly installed on the side of the concave support base (1). A lifting and adjusting mechanism is installed inside the support cylinder (2), and four lifting components are annularly arrayed at one end of the lifting and adjusting mechanism; Four clamping mechanisms for easy disassembly and assembly are annularly arrayed on the sides of the two regular polygon plates (21). The four clamping mechanisms on the two regular polygon plates (21) are distributed symmetrically in pairs, left and right. An optical cable body (58) is arranged between the two clamping mechanisms that are symmetrically distributed left and right.

2. The tensile strength testing device for an optical cable sheath according to claim 1, wherein: The pushing mechanism includes an L-shaped support plate (12) fixedly installed at the upper end of one side plate of the concave support base (1). A T-shaped guiding groove (13) is opened at the upper end of the L-shaped support plate (12). A hydraulic cylinder (14) is fixedly installed at the upper end inside the L-shaped support plate (12). A push block (15) is fixedly installed at the end of the inner rod of the hydraulic cylinder (14). A T-shaped guiding block (16) is fixedly installed at the upper end of the push block (15). The T-shaped guiding block (16) is slidably connected to the T-shaped guiding groove (13) left and right. A pressure sensor (17) is fixedly installed on the side of the push block (15).

3. The tensile strength testing device for an optical cable sheath according to claim 1, characterized in that: Four positioning and bearing plates (25) and four L-shaped bearing plates (26) are respectively annularly arrayed and fixedly installed on the sides of the two regular polygon plates (21). T-shaped strip plates (27) are fixedly installed on the four L-shaped bearing plates (26). The four clamping mechanisms on the side of one regular polygon plate (21) are respectively fixedly installed on the four positioning and bearing plates (25). The four clamping mechanisms on the side of the other regular polygon plate (21) are respectively slidably installed left and right on the four L-shaped bearing plates (26). Four protective baffle plates (28) are annularly arrayed and fixedly installed between the two regular polygon plates (21).

4. An optical cable sheath tensile strength testing device according to claim 1, characterized in that: The lifting and adjusting mechanism includes a guide ring (24) fixedly installed on the inner side wall of the support cylinder (2). A circular tube (3) is inserted through the inside of the guide ring (24). At one end of the circular tube (3), a crown gear (31) and an external gear ring (32) are fixedly sleeved in sequence from outside to inside. At one end of the circular tube (3) inside the guide ring (24), a plurality of fan-shaped rotating blocks (33) are fixedly connected in an annular array. A fan-shaped rotating groove (34) is formed on the outer side surface of each fan-shaped rotating block (33). The fan-shaped rotating groove (34) is rotationally connected with the guide ring (24). A fan-shaped through groove (23) is formed on the side surface of the support cylinder (2). The fan-shaped through groove (23) is distributed outside the external gear ring (32). Four lifting components are distributed in an annular array on the side surface of the crown gear (31).

5. The tensile strength testing device for an optical cable sheath according to claim 4, wherein: The lifting component includes a concave plate (4) fixedly installed on the outer side surface of the support cylinder (2). The four concave plates (4) in the four lifting components are distributed in an annular array on the outer side surface of the support cylinder (2). The fan-shaped through groove (23) is located below the inside of one concave plate (4). A rectangular cylinder (41) is fixedly installed on the outer side surface of the concave plate (4). A circular shaft (42) is rotatably installed on the outer side surface of the concave plate (4) inside the rectangular cylinder (41). One end of the circular shaft (42) passes through the concave plate (4), the support cylinder (2) in sequence and extends into the inner cavity of the support cylinder (2). One end of the circular shaft (42) inside the support cylinder (2) is fixedly connected with a main gear (43). The main gear (43) meshes with the crown gear (31). One end of the circular shaft (42) far from the crown gear (31) is fixedly connected with an adjusting screw rod (44). The adjusting screw rod (44) is arranged in the inner cavity of the rectangular cylinder (41). A rectangular support column (45) is slidably installed in the rectangular cylinder (41). A threaded groove (46) is formed at one end of the rectangular support column (45) close to the concave plate (4). The adjusting screw rod (44) is threadedly connected with the threaded groove (46). One end of the rectangular support column (45) far from the concave plate (4) is fixedly installed with a U-shaped limit seat (47). The optical cable body (58) is arranged through the inside of the U-shaped limit seat (47). A locking mechanism is installed on the concave plate (4). The locking mechanism is arranged above the fan-shaped through groove (23).

6. The tensile strength testing device for an optical cable sheath according to claim 5, wherein: The locking mechanism includes a locking bolt (321) threadedly installed on the outer side surface of the concave plate (4). One end of the locking bolt (321) passes through the concave plate (4) and extends to its inner side. One end of the locking bolt (321) inside the concave plate (4) is rotatably installed with a locking tooth block (322) through a pin shaft. On one side of the locking tooth block (322) close to the locking bolt (321), sliding plates (323) are symmetrically fixedly installed. One end of the sliding plate (323) far from the locking tooth block (322) passes through the concave plate (4), and the sliding plate (323) is slidably connected with the concave plate (4). One side of the locking tooth block (322) with teeth passes through the fan-shaped through groove (23) and is clamped with the external gear ring (32).

7. The tensile strength testing device for an optical cable sheath according to claim 1, characterized in that: The clamping mechanism includes a bottom plate (5) arranged on the side surface of the regular polygon plate (21). On the side of the bottom plate (5) away from the regular polygon plate (21), a bending guide wheel (52) and two U-shaped clamping bases (53) are successively and fixedly installed. On one side of one U-shaped clamping base (53), there is a fixed block (54), and the fixed block (54) is fixedly connected to the bottom plate (5). On one side of the other U-shaped clamping base (53), there is a positioning plate, and the positioning plate is fixedly connected to the bottom plate (5). The upper end of the positioning plate is rotatably installed with an upper cover plate (6) through a rotating shaft. On the side of the upper cover plate (6) close to the U-shaped clamping base (53), clamping components are symmetrically installed. The two clamping components are respectively arranged above the inner sides of the two U-shaped clamping bases (53). Inside the upper cover plate (6), a locking mechanism is installed on the side of the clamping component. The positioning and bearing plate (25) is fixedly connected to the adjacent bottom plate (5). At the lower end of the bottom plate (5) above the L-shaped bearing plate (26), a T-shaped limiting groove is opened, and the T-shaped limiting groove is slidably connected to the T-shaped strip plate (27) left and right. On the side surface of the bottom plate (5) above the L-shaped bearing plate (26), a resisting block (51) is fixedly connected. One end of the optical cable body (58) penetrates through the inside of one U-shaped clamping base (53) and extends near the bending guide wheel (52). One end of the optical cable body (58) is bent in a U shape along the bending guide wheel (52) and then passes through the inside of the other U-shaped clamping base (53). On the side of the upper cover plate (6) close to the fixed block (54), a sector-shaped insertion block (65) is fixedly installed. On the outer surface of the sector-shaped insertion block (65), a card slot (66) is opened. On the side of the fixed block (54) close to the upper cover plate (6), a sector-shaped insertion slot (55) is opened. On the side surface of the sector-shaped insertion slot (55), a groove (56) is opened. The side surface of the groove (56) penetrates outward to form a threaded hole (57). The sector-shaped insertion block (65) is inserted into the sector-shaped insertion slot (55), and a locking mechanism is installed inside the fixed block (54).

8. An optical cable sheath tensile strength testing device according to claim 7, characterized in that: The locking mechanism includes a locking block (8) slidably installed in the groove (56). The locking block (8) on the door lock is clamped with the card slot (66). On the side of the locking block (8) close to the sector-shaped insertion block (65), an extrusion inclined surface is opened. On the side of the locking block (8) away from the sector-shaped insertion block (65), locking springs (81) are symmetrically inserted. On the side surface of the locking block (8) between the two locking springs (81), a concave block (82) is fixedly installed. The end of the locking spring (81) away from the locking block (8) abuts against the groove (56). A round rod (84) is penetrated through the threaded hole (57). One end of the round rod (84) outside the fixed block (54) is fixedly connected with a fastening screw (83). One end of the round rod (84) inside the groove (56) penetrates through the side surface of the concave block (82) and extends to its inside. One end of the round rod (84) inside the concave block (82) is fixedly connected with a pressing round block (85). The round rod (84) is slidably connected with the concave block (82).

9. The tensile strength testing device for an optical cable sheath according to claim 7, wherein: A plurality of lifting grooves (61) are symmetrically formed in the side surface of the upper cover plate (6), circular grooves (62) are symmetrically formed in the side surface of the upper cover plate (6), annular grooves (63) are formed in the inner sides of the two circular grooves (62), a concave groove (64) is formed in the inner side of the upper cover plate (6), and two ends of the concave groove (64) are respectively communicated with the two annular grooves (63); The clamping assembly includes an internally threaded sleeve (7) rotatably installed in the circular groove (62). The internally threaded sleeve (7) penetrates through the circular groove (62). An adjusting sleeve (71), a limiting toothed ring (72) and a rotating ring (73) are fixedly sleeved on the outer side of the internally threaded sleeve (7) in sequence from top to bottom. The limiting toothed ring (72) is rotatably connected with the annular groove (63). The adjusting sleeve (71) and the rotating ring (73) are respectively in rotational contact with the upper and lower sides of the upper cover plate (6). A lifting screw rod (74) is installed through the inner side of the internally threaded sleeve (7). The lower end of the lifting screw rod (74) is fixedly connected with an upper clamping plate (75). Lifting plates (76) are symmetrically and fixedly connected to one side of the upper clamping plate (75) close to the upper cover plate (6). The locking mechanism is arranged in the concave groove (64); The lifting screw rod (74) is in threaded connection with the internally threaded sleeve (7). The lifting plate (76) is slidably connected with the lifting groove (61). Anti-slip grooves are formed in the clamping portion of the upper clamping plate (75) and the bottom of the inner side of the U-shaped clamping base (53).

10. An optical cable sheath tensile strength testing device according to claim 9, characterized in that: The locking mechanism includes a transmission plate (9) slidably installed in the concave groove (64). Locking toothed blocks (91) are symmetrically and fixedly connected to one side of the transmission plate (9) close to the limiting toothed ring (72). The two locking toothed blocks (91) are respectively clamped with the two limiting toothed rings (72). Elastic pieces (92) are symmetrically and fixedly installed on one side of the transmission plate (9) away from the locking toothed blocks (91). A pull rod (93) is slidably inserted into the side surface of the upper cover plate (6). One end of the pull rod (93) passes through the upper cover plate (6) and extends into the concave groove (64). One end of the pull rod (93) in the concave groove (64) is fixedly connected with the transmission plate (9).

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