A halogen-free, low-smoke, flame-retardant cable performance test system

Abstract

The invention relates to the technical field of cable detection, and discloses a halogen-free low-smoke flame-retardant cable performance testing system, comprising a workbench, a circular ring is installed on the workbench, the circular ring is driven to rotate on the workbench, a first clamp and a passive component are also installed on the workbench, a second clamp is installed on the circular ring, the second clamp is driven to revolve through the rotation of the circular ring, two ends of the cable are respectively clamped on the first clamp and the second clamp, and the passive component is used to drive the second clamp to rotate during its revolution; the rotation of the circular ring on the workbench drives the second clamp to revolve, and at the same time drives the second clamp to rotate on the circular ring under the drive of the passive component, the rotation of the second clamp drives the cable to rotate, and the use of the passive component reduces the energy consumption generated by long-term testing.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection, in particular to a halogen-free, low-smoke, flame-retardant cable performance testing system. Background Art

[0002] Halogen-free low-smoke flame-retardant cable is a special type of cable that does not release toxic halogen gas when burned and produces very little smoke. Halogen-free low-smoke flame-retardant cable has the following characteristics: halogen-free, low smoke, good flame retardancy, and environmental protection. Although halogen-free low-smoke flame-retardant cable has the above characteristics, it still needs to meet certain mechanical strength requirements, such as bending performance, tensile strength, etc.

[0003] For example, a patent with announcement number CN206583727U and announcement date October 24, 2017 discloses a wire and cable bending tester, which relates to the field of cable performance testing technology. The machine comprises a base, a first clamping block is arranged on one side of the base, a mechanical arm is horizontally arranged on the top of the base, the mechanical arm is rotatably connected to a first rotating mechanism arranged in the base, and a second rotating mechanism is arranged at one end of the mechanical arm away from the base, a second clamping block is arranged on the second rotating mechanism, and the wire and cable to be tested are fixed between the second clamping block and the first clamping block.

[0004] In the prior art, when testing the curvature of a cable, most of the time, the curvature test is performed by superimposing the cable's revolution and rotation, and two independent driving devices are required to drive the cable to revolve and rotate respectively. For example, in the above-mentioned public patent, since the cable testing time is very long, the use of two independent driving devices is more energy-consuming. Summary of the invention

[0005] The purpose of the present invention is to provide a halogen-free, low-smoke, flame-retardant cable performance testing system to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a halogen-free low-smoke flame-retardant cable performance testing system, comprising a workbench, a circular ring is installed on the workbench, the circular ring is driven to rotate on the workbench, a first clamp and a passive component are also installed on the workbench, a second clamp is installed on the circular ring, the second clamp is driven to revolve by the rotation of the circular ring, two ends of the cable are respectively clamped on the first clamp and the second clamp, and the passive component is used to drive the second clamp to rotate during its revolution.

[0007] Preferably, a rotating seat is installed on the circular ring, and the second clamp is rotatably installed inside the rotating seat. The passive component includes a bevel gear ring and a bevel gear. The bevel gear ring is fixedly installed on the workbench, the bevel gear is meshed with the bevel gear ring, and the bevel gear is fixedly connected to the second clamp through a connecting shaft.

[0008] Preferably, the second clamp is driven to move horizontally in the rotating seat.

[0009] Preferably, a limiting column is rotatably installed inside the rotating seat, a hole and a slide groove are opened inside the limiting column, the central axis of the hole is consistent with the central axis of the limiting column, the slide groove is located below the hole and connected with the hole, a slider is installed in the slide groove, the slider and the slide groove form a sliding guide cooperation, and the second clamp is fixedly connected to the slider.

[0010] Preferably, the second clamp includes a first clamping plate and a second clamping plate, one end of the first clamping plate is rotatably connected to one end of the second clamping plate, and the first clamping plate is fixedly connected to the slider.

[0011] Preferably, when the second clamp is driven to move into the rotating seat, the first clamping plate and the second clamping plate are gradually closed.

[0012] Preferably, a first limit block is provided at the other end of the first splint, and a second limit block is provided at the other end of the second splint. A guide slope is provided in the limit column, and the guide slope is used to drive the second limit block to move toward the side close to the first limit block. The guide slope and the second limit block form a limit interference fit.

[0013] Preferably, a limiting groove is further provided in the limiting column, the limiting groove is located on a side surface of the hole, and the first limiting block and the second limiting block can extend into the limiting groove.

[0014] Preferably, a fixing plate and a guide plate for forming a guiding slope are installed inside the limiting groove, the upper end of the fixing plate is fixedly connected to the inner wall of the limiting column, and the other end is rotatably connected to the guide plate, and a first spring is provided on the side of the guide plate away from the hole opening, one end of the first spring is fixedly connected to the guide plate, and the other end is fixedly connected to the inner wall of the limiting column.

[0015] Preferably, a receiving groove is provided on the outer wall of the second clamping plate, a clamping block and a second spring are installed inside the receiving groove, the clamping block and the receiving groove form a limiting interference fit, one end of the second spring is fixedly connected to the clamping block, and the other end is fixedly connected to the second clamping plate, and a clamping groove is provided on the side of the guide plate, and the clamping groove and the clamping block form a limiting interference fit.

[0016] The beneficial effect of the present invention lies in that: in the above technical scheme, the rotation of the ring of the present invention on the workbench drives the second fixture to revolve, and at the same time, the second fixture is driven by the passive component to rotate on the ring, and the rotation of the second fixture drives the cable to rotate. The use of passive components reduces the energy consumption generated by long-term testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0019] Figure 2 A top view provided for an embodiment of the present invention;

[0020] Figure 3 A side sectional view of a rotating seat provided in an embodiment of the present invention;

[0021] Figure 4 The embodiment of the present invention provides Figure 3 A in the enlarged view;

[0022] Figure 5 A schematic diagram of the structure of a rotating seat provided in an embodiment of the present invention;

[0023] Figure 6 An internal cross-sectional view of a rotating seat provided in an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of a second clamp structure provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Workbench; 2. First clamp; 3. Circular ring; 4. Second clamp; 41. First clamp; 42. Second clamp; 43. First limit block; 44. Second limit block; 45. Accommodating groove; 46. Block; 47. Second spring; 48. Slot; 5. Passive part; 51. Bevel gear; 52. Bevel gear ring; 53. Connecting shaft; 6. Rotating seat; 61. Limit column; 62. Hole; 63. Slide groove; 64. Slider; 65. Guide slope; 66. Guide plate; 67. Fixed plate; 68. First spring; 69. Limit groove; 7. Cable. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-7 As shown, an embodiment of the present invention provides a halogen-free low-smoke flame-retardant cable performance testing system, including a workbench 1, a ring 3 is installed on the workbench 1, the ring 3 is driven to rotate on the workbench 1, a first clamp 2 and a passive component 5 are also installed on the workbench 1, a second clamp 4 is installed on the ring 3, the second clamp 4 is driven to revolve by the rotation of the ring 3, two ends of the cable 7 are clamped on the first clamp 2 and the second clamp 4 respectively, and the passive component 5 is used to drive the second clamp 4 to rotate during its revolution.

[0030] Specifically, the upper surface of the workbench 1 is horizontal, and the ring 3 is rotatably mounted on the upper surface of the workbench 1. The ring 3 is driven to rotate on the workbench 1, that is, to rotate on its own. In this embodiment, a gear ring is fixedly mounted on the lower surface of the ring 3, and a gear and a motor are mounted inside the workbench 1. The motor is fixedly mounted on the inner wall of the workbench 1, and the gear is rotatably connected to the inner wall of the workbench 1. The output shaft of the motor is fixedly connected to the gear, and the gear is meshed with the gear ring. When the motor drives the gear to rotate, the gear drives the ring 3 to rotate on the workbench 1 through the meshing relationship with the gear ring, that is, the ring 3 rotates on its own. Obviously, In other embodiments, the ring 3 can be driven to rotate by other means. The rotation of a single ring 3 belongs to the prior art and is not described in detail. It should be noted that the halogen-free low-smoke flame-retardant cable performance test system provided in this embodiment requires the ring 3 to rotate back and forth rather than continuously rotating in a single direction, such as reciprocating repeated rotation within an arc range of 90-270 degrees. A support plate is also installed on the workbench 1. The support plate is arranged vertically and is located on one side of the ring 3. The first clamp 2 is installed on the support plate, and the second clamp 4 is installed on the ring 3. Figure 1As shown, when the two ends of the cable 7 are respectively clamped on the first clamp 2 and the second clamp 4, the cable 7 will be arranged in an arc shape on the workbench 1. In this embodiment, the first clamp 2 and the second clamp 4 are both used to fix the ends of the cable 7 to be tested, such as a U-shaped clamp, a wire clamp, etc. This is the prior art. In actual use, the rotation of the ring 3 on the workbench 1 drives the second clamp 4 to revolve, and at the same time, the second clamp 4 is driven by the passive component 5 to rotate on the ring 3. The rotation of the second clamp 4 drives the cable 7 to rotate. The use of the passive component 5 reduces the energy consumption generated by long-term testing.

[0031] In an optional embodiment, preferably, a rotating seat 6 is installed on the ring 3, the second fixture 4 is rotatably installed inside the rotating seat 6, the passive component 5 includes a bevel gear ring 52 and a bevel gear 51, the bevel gear ring 52 is fixedly installed on the workbench 1, the bevel gear 51 is meshed with the bevel gear ring 52, and the bevel gear 51 is fixedly connected to the second fixture 4 through a connecting shaft 53.

[0032] Specifically, the center of the circular ring 3 is consistent with the center of the bevel gear ring 52, the rotating seat 6 is horizontally installed on the circular ring 3, a hole 62 is opened inside the rotating seat 6, the second clamp 4 is installed in the hole 62 of the rotating seat 6, one end of the connecting shaft 53 passes through the rotating seat 6 and is connected to the second clamp 4. During use, the rotation of the circular ring 3 drives the rotating seat 6 to revolve around the center of the circular ring 3, and the revolution of the rotating seat 6 drives the second clamp 4 and the bevel gear 51 to revolve synchronously. The bevel gear 51 meshes with the bevel gear ring 52 during the revolution and drives the bevel gear 51 to rotate passively. The bevel gear 51 drives the second clamp 4 to rotate on the rotating seat 6 through the connecting shaft 53, which can drive the cable 7 to rotate. In this embodiment, Figure 2 As shown, the bevel gear ring 52 is located below the bevel gear 51, that is, when the bevel gear 51 revolves in one direction, the bevel gear 51 can only rotate in one direction under the meshing of the bevel gear ring 52. Obviously, this will cause the cable 7 to continue to rotate for multiple turns. It can be understood by those skilled in the art that in other embodiments of the present invention, the bevel gear ring 52 can also be divided into several sections, and the several sections of the bevel gear ring 52 are symmetrically and staggeredly arranged on the upper and lower sides of the bevel gear 51 (not shown). Under this arrangement, the bevel gear 51 is in the process of revolution. In the embodiment, it can mesh not only with the bevel gear ring 52 located above it, but also with the bevel gear ring 52 located below it, so that the bevel gear 51 can perform bidirectional rotation during unidirectional revolution, that is, reciprocating rotation. The reciprocating rotation of the bevel gear 51 can drive the cable 7 to perform reciprocating rotation during the revolution in a single direction. Furthermore, according to the number and position arrangement of the upper and lower layers of bevel gear rings 52 (segments), the rotation direction and number of turns of the cable 7 can be completely freely controlled. This is simple common sense of gear meshing and will not be elaborated.

[0033] In an optional embodiment, preferably, the second clamp 4 is driven to move horizontally in the rotating seat 6 .

[0034] Specifically, a limiting column 61 is rotatably installed inside the rotating seat 6, and the second clamp 4 is rotatably connected to the rotating seat 6 through the limiting column 61. The hole 62 is opened in the limiting column 61, and a slide groove 63 is also opened inside the limiting column 61. The central axis of the hole 62 is consistent with the central axis of the limiting column 61. The slide groove 63 is located below the hole 62 and is connected to the hole 62. A slider 64 is installed in the slide groove 63. The slider 64 and the slide groove 63 form a sliding guide. The second clamp 4 is fixedly connected to the slider 64. In actual use, the second clamp After the tool 4 clamps the cable 7, the staff can push the second clamp 4 into the hole 62 of the limiting column 61 by hand, and the slider 64 slides in the slide groove 63. When the cable 7 passes the inspection (at this time, the rotation of the second clamp 4 will drive the synchronous rotation of the limiting column 61), the staff can pull the cable 7 or the second clamp 4 to make the slider 64 reset in the slide groove 63, and the second clamp 4 extends out from the hole 62, and then the cable 7 can be taken out. The whole process is simple, convenient and easy to operate, which facilitates the staff to replace the cable 7.

[0035] In an optional embodiment, preferably, the second clamp 4 includes a first clamp 41 and a second clamp 42, one end of the first clamp 41 is rotatably connected to one end of the second clamp 42, the first clamp 41 is fixedly connected to the slider 64, the first clamp 41 and the second clamp 42 are both arc-shaped, and the first clamp 41 and the second clamp 42 are spliced ​​and closed to form a cylindrical structure, and a storage hole is formed inside, and the cable 7 is located in the storage hole formed by the first clamp 41 and the second clamp 42.

[0036] Furthermore, when the second clamp 4 is driven to move into the rotating seat 6 , the first clamping plate 41 and the second clamping plate 42 are gradually closed.

[0037] Specifically, in order to ensure the clamping strength of the first clamping plate 41 and the second clamping plate 42 on the cable 7 during the clamping process, the diameter of the receiving hole is slightly smaller than the diameter of the end of the cable 7 in a relaxed state. The cable 7 in a relaxed state is the cable 7 that has not been clamped. Therefore, when the staff puts the cable 7 on the first clamping plate 41 and rotates the second clamping plate 42 to cover the first clamping plate 41, the diameter of the end of the cable 7 in a relaxed state is larger than the diameter of the receiving hole, resulting in the second clamping plate 42 not being able to completely cover the first clamping plate 41. Figure 7As shown, in the present embodiment, when the first clamp 41 and the second clamp 42 enter the hole 62 in the unclosed state, the second clamp 42 will rotate toward the side close to the first clamp 41 during the movement, so that the first clamp 41 and the second clamp 42 are closed, and the cable 7 is squeezed in the closing process, so that the insulating rubber layer on the surface of the cable 7 is deformed and filled into each area of ​​the storage hole. At this time, the end of the cable 7 is in an extruded and tightened state and is clamped between the first clamp 41 and the second clamp 42 to clamp the cable 7, thereby preventing the second clamp 4 from shaking in the hole 62 during rotation and revolution and preventing the cable 7 from falling off during the test.

[0038] In an optional embodiment, preferably, a first limit block 43 is provided at the other end of the first clamp 41, and a second limit block 44 is provided at the other end of the second clamp 42. A guide slope 65 is provided in the limit column 61. The guide slope 65 is in a downwardly inclined state. The guide slope 65 is used to drive the second limit block 44 to move toward the side close to the first limit block 43. The guide slope 65 and the second limit block 44 form a limit interference fit.

[0039] Specifically, a limiting groove 69 is further provided in the limiting column 61, and the limiting groove 69 is located on one side of the hole 62. The first limiting block 43 and the second limiting block 44 can extend into the limiting groove 69, and the guiding slope 65 is in a downwardly inclined state, that is, one end of the guiding slope 65 close to the opening of the hole 62 is located above the other end. In this embodiment, the guiding slope 65 is the upper groove wall of the limiting groove 69. When the first clamping plate 41 and the second clamping plate 42 enter the hole 62 in an unclosed state, the first limiting block 43 and the second limiting block 44 enter the limiting groove 69 and slide in the limiting groove 69. Due to the unclosure of the first clamping plate 41 and the second clamping plate 42, when the first limiting block 43 is in a horizontal state, the second limiting block 44 is in an upwardly inclined state, and there is a certain gap with the first limiting block 43, such as Figure 7 As shown, during the sliding process of the first limit block 43 and the second limit block 44 in the limit groove 69, the upwardly inclined second limit block 44 will contact the guiding slope 65 and move toward the side close to the first limit block 43 under the force of the guiding slope 65. The movement of the second limit block 44 drives the second clamping plate 42 to rotate toward the side close to the first clamping plate 41. The distance between the end of the guiding slope 65 and the lower groove wall of the limit groove 69 is equal to the height of the first limit block 43 plus the second limit block 44. Therefore, when the second limit block 44 moves to the end of the guiding slope 65, the guiding slope 65 forces the second limit block 44 to fit the upper surface of the first limit block 43. At this time, the first clamping plate 41 and the second clamping plate 42 are closed, thereby realizing the clamping of the cable 7 during the movement.

[0040] In an optional embodiment, preferably, a fixing plate 67 and a guide plate 66 for forming a guide slope 65 are installed inside the limiting groove 69, the upper end of the fixing plate 67 is fixedly connected to the inner wall of the limiting column 61, and the other end is rotatably connected to the guide plate 66, and a first spring 68 is provided on the side of the guide plate 66 away from the opening of the hole 62, one end of the first spring 68 is fixedly connected to the guide plate 66, and the other end is fixedly connected to the inner wall of the limiting column 61.

[0041] Specifically, the guide plate 66 is arranged to be tilted downward, and the lower surface of the guide plate 66 is the guide inclined surface 65 in the above embodiment. The rotation connection between the fixed plate 67 and the guide plate 66 is located on the side of the central area of ​​the guide plate 66 away from the opening of the hole 62. Now, the plate portion on one side of the guide plate 66 where it is rotated with the fixed plate 67 and close to the hole 62 is the first plate portion, and the plate portion on the other side is the second plate portion. In actual use, the upper end of the second limit block 44 tilted upward contacts the guide inclined surface, that is, the lower surface of the guide plate 66. Since the contact position at this time is located on the side of the rotation connection between the fixed plate 67 and the guide plate 66 close to the opening of the hole 62, the second limit block 44 The second limit block 44 contacts the first plate portion first. Since the guide plate 66 is initially in a downwardly inclined state, the contact between the second limit block 44 and the first plate portion does not cause the guide plate 66 to rotate. The guide plate 66 will drive the second limit block 44 to move to the side close to the first limit block 43 through its own guide slope 65, and the second clamping plate 42 gradually rotates until the second limit block 44 moves to the connection between the first plate portion and the second plate portion, that is, directly below the rotation connection between the fixed plate 67 and the guide plate 66. Since the distance between the lower surface of the guide plate 66 and the lower groove wall of the limit groove 69 is equal to the height of the first limit block 43 plus the second limit block 44, When the second limit block 44 is pressed against the first plate portion, it will fit on the upper surface of the first limit block 43, and the first clamp 41 and the second clamp 42 are completely closed. Then the staff continues to push the second clamp 4 to move into the hole 62, and the second limit block 44 contacts the second plate portion. At this time, the second limit block 44 drives the second plate portion to rotate upward, that is, the guide plate 66 rotates from a downwardly inclined state to a horizontal state as a whole and fits on the surface of the second limit block 44. At this time, the first spring 68 contracts. Finally, the second clamp 4 is completely moved into the hole 62 in the closed state, and the second limit block 44 moves under the guide plate 66 in the horizontal state. The guide plate 66 is in the first spring 68. 8 The first limit block 43 and the second limit block 44 are clamped and limited in the limit groove 69 under the support of the elastic force, so that the first clamp 41 and the second clamp 42 are limited and fixed in the limit column 61, that is, the second clamp 4 is fixed in the limit column 61, and the opening of the hole 62 on the rotating seat 6 is located on the side of the rotating seat 6 close to the center of the ring 3, so when the second clamp 4 enters the limit column 61 from the hole 62 on this side, the centrifugal force generated by the revolution of the ring 3 driving the rotating seat 6 will drive the second clamp 4 to move to the side away from the opening of the hole 62. Therefore, under the clamping of the guide plate 66 and the action of the centrifugal force of the revolution, the second clamp 4 can be stably fixed in the hole 62.

[0042] In an optional embodiment, preferably, a receiving groove 45 is provided on the outer wall of the second clamping plate 42, and a clamping block 46 and a second spring 47 are installed inside the receiving groove 45, and the clamping block 46 and the receiving groove 45 form a limiting abutment fit, one end of the second spring 47 is fixedly connected to the clamping block 46, and the other end is fixedly connected to the second clamping plate 42, and a clamping groove 48 is provided on the side of the guide plate 66, and the clamping groove 48 and the clamping block 46 form a limiting abutment fit.

[0043] Specifically, the accommodating groove 45 is opened along the radial direction of the second clamping plate 42, that is, the sliding of the clamping block 46 in the accommodating groove 45 slides along the radial direction of the hole 62, the second spring 47 is located on the side of the clamping block 46 away from the opening of the accommodating groove 45, the side surface of the guide plate 66 is arc-shaped and adapted to the outer wall of the second clamping plate 42, and the clamping groove 48 is opened on the side of the guide plate 66 close to the hole 62. When the second clamp 4, that is, the first clamping plate 41 and the second clamping plate 42, completely enters the hole 62, because the guide plate 66 is horizontal at this time, the side surface of the guide plate 66 close to the hole 62 is in contact with the outer wall of the second clamping plate 42, the clamping groove 48 on the guide plate 66 is connected with the accommodating groove 45 on the second clamping plate 42. When the bevel gear 51 drives the limiting column 61 to rotate inside the rotating seat 6, the centrifugal force generated by the rotation of the limiting column 61 drives the clamping block 46 to extend out of the accommodating groove 45, and the clamping block 46 extends out of the accommodating groove 45. One end of the groove 45 enters the clamping groove 48, and at the same time the second spring 47 is stretched. The extension of the clamping block 46 causes the second clamp 42 to be unable to move horizontally on the guide plate 66, and the guide plate 66 is also unable to rotate under the resistance of the clamping block 46 and the second clamp 42, that is, at this time the second clamp 42 is locked with the guide plate 66, and the second clamp 42 is locked inside the limiting column 61. Even if the cable 7 is pulled from the outside, the second clamp 4 and the cable 7 cannot be pulled out, thereby avoiding the phenomenon of accidental touch. Until the test is completed, after the bevel gear 51 and the limiting column 61 stop rotating, the second spring 47 resets and pulls the clamping block 46 back into the accommodating groove 45. The staff can pull the second clamp 4 or the cable 7 hard to pull the second clamp 4 out of the hole 62, and the guide plate 66 begins to reset after losing the resistance of the second clamp 4, and the first spring 68 resets and stretches and drives the guide plate 66 to reset to a downward tilted state.

[0044] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A halogen-free low-smoke flame-retardant cable performance testing system, characterized in that: The invention comprises a workbench (1), wherein a circular ring (3) is mounted on the workbench (1), and the circular ring (3) is driven to rotate on the workbench (1); a first clamp (2) and a passive component (5) are also mounted on the workbench (1); a second clamp (4) is mounted on the circular ring (3), and the second clamp (4) is driven to revolve through the rotation of the circular ring (3); two ends of a cable (7) are respectively clamped on the first clamp (2) and the second clamp (4); the passive component (5) is used to drive the second clamp (4) to rotate during its revolving process; a rotating seat (6) is mounted on the circular ring (3); The second fixture (4) is rotatably mounted inside the rotating seat (6); the passive component (5) comprises a bevel gear ring (52) and a bevel gear (51); the bevel gear ring (52) is fixedly mounted on the workbench (1); the bevel gear (51) meshes with the bevel gear ring (52); the bevel gear (51) is fixedly connected to the second fixture (4) via a connecting shaft (53); the second fixture (4) is driven to move horizontally inside the rotating seat (6); a limit column (61) is rotatably mounted inside the rotating seat (6); a hole (62) and a slide groove (63) are provided inside the limit column (61); the hole (62) and a slide groove (63) are provided inside the limit column (61); The central axis of the hole (62) is consistent with the central axis of the limiting column (61); the slide groove (63) is located below the hole (62) and is connected to the hole (62); a slider (64) is installed in the slide groove (63); the slider (64) and the slide groove (63) form a sliding guide; the second clamp (4) is fixedly connected to the slider (64); the second clamp (4) includes a first clamp (41) and a second clamp (42); one end of the first clamp (41) is rotatably connected to one end of the second clamp (42); the first clamp (41) is fixedly connected to the slider (64); 4); when the second clamp (4) is driven to move into the rotating seat (6), the first clamp (41) and the second clamp (42) are gradually closed; the other end of the first clamp (41) is provided with a first limit block (43), the other end of the second clamp (42) is provided with a second limit block (44), and the limit column (61) is provided with a guide inclined surface (65), the guide inclined surface (65) is used to drive the second limit block (44) to move toward a side close to the first limit block (43), and the guide inclined surface (65) and the second limit block (44) form a limit contact fit.

2. A halogen-free low-smoke flame-retardant cable performance testing system according to claim 1, characterized in that: A limiting groove (69) is also provided in the limiting column (61). The limiting groove (69) is located on a side surface of the hole (62). The first limiting block (43) and the second limiting block (44) can extend into the limiting groove (69).

3. A halogen-free low-smoke flame-retardant cable performance testing system according to claim 2, characterized in that: A fixing plate (67) and a guide plate (66) for forming a guide inclined surface (65) are installed inside the limiting groove (69); the upper end of the fixing plate (67) is fixedly connected to the inner wall of the limiting column (61), and the other end is rotatably connected to the guide plate (66); a first spring (68) is provided on the side of the guide plate (66) away from the opening of the hole (62); one end of the first spring (68) is fixedly connected to the guide plate (66), and the other end is fixedly connected to the inner wall of the limiting column (61).

4. A halogen-free low-smoke flame-retardant cable performance testing system according to claim 3, characterized in that: The outer wall of the second clamping plate (42) is provided with a receiving groove (45), a clamping block (46) and a second spring (47) are installed inside the receiving groove (45), the clamping block (46) and the receiving groove (45) form a limiting abutment fit, one end of the second spring (47) is fixedly connected to the clamping block (46), and the other end is fixedly connected to the second clamping plate (42), and a clamping groove (48) is provided on the side surface of the guide plate (66), and the clamping groove (48) and the clamping block (46) form a limiting abutment fit.

Images