Cable thermal extension test device

Abstract

The invention relates to a cable thermal extension test device which comprises a rack and a clamping assembly, a set of supports are symmetrically arranged on the two sides of the upper portion of the rack, a driving assembly is arranged in the middle of the upper portion of the rack, movable adjusting assemblies are arranged in front of the supports and connected with the supports in a sliding mode, and rotating assemblies are arranged on the inner sides of the movable adjusting assemblies. The rotating assembly is in power connection with the driving assembly; the outer sides of the upper portions of the rotating assemblies are connected with low-gyroscopic-moment rotating joints installed on the rack through connecting frames, rotating chucks are arranged on the inner sides of the upper portions of the rotating assemblies, and clamping assemblies are clamped in the rotating chucks. A portal frame is arranged behind the support, an infrared heating pipe assembly is installed on the portal frame, a cable to be tested is arranged in the infrared heating pipe assembly, and the two ends of the cable to be tested are connected with clamping assemblies respectively; the clamping device has the advantages of being reasonable in structure, rapid and convenient to clamp, firm and reliable in clamping and high in practicability.

Description

Technical Field

[0001] The invention belongs to the technical field of cable testing devices, and in particular relates to a cable thermal extension testing device. Background Art

[0002] The safety of cable performance plays a vital role in power transmission, including thermal extension test detection, which mainly refers to the corresponding temperature detection stretching test on the outer skin of the cable. By setting different heating times and temperatures, the maximum destructive force, tensile strength, elongation and shrinkage of the cable can be tested. However, the existing cable thermal extension test device has the following problems: first, it is impossible to clamp the test piece quickly and conveniently during use, and it is time-consuming and labor-intensive to clamp the test piece. Moreover, during the test, the test piece is easy to fall off due to loose clamping, resulting in test failure; second, the existing device can only test cables of a specific length, and cannot be adaptively adjusted according to the cable length, and it is also impossible to test cables of different length specifications, resulting in limited scope of application; therefore, it is very necessary to provide a cable thermal extension test device with reasonable structure, fast and convenient clamping, firm and reliable clamping, and strong practicality. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a cable thermal extension test device with reasonable structure, quick and convenient clamping, firm and reliable clamping and strong practicality.

[0004] The objective of the present invention is achieved as follows: A cable thermal extension test device comprises a frame and a clamping assembly, a group of supports are symmetrically arranged on both sides above the frame, a driving assembly is arranged in the middle part above the frame, a movable adjustment assembly is arranged in front of the supports, the movable adjustment assembly is slidably connected to the supports, a rotating assembly is arranged on the inner side of the movable adjustment assembly, and the rotating assembly is dynamically connected to the driving assembly; the outer side above the rotating assembly is connected to a low-rotation torque rotary joint installed on the frame through a connecting frame, and a rotating chuck is arranged on the inner side, and a clamping assembly is clamped inside the rotating chuck; a gantry is arranged behind the support, an infrared heating tube assembly is installed on the gantry, a cable to be tested is arranged inside the infrared heating tube assembly, and both ends of the cable to be tested are respectively connected to the clamping assembly.

[0005] The driving assembly includes a reduction motor, a first synchronous belt transmission assembly is installed at the output end of the reduction motor, the first synchronous belt transmission assembly is dynamically connected to the main shaft, keyway shafts are arranged on both sides of the main shaft, the keyway shafts are connected to the main shaft through coupling seats, and bearing seats are arranged at the outer ends of the keyway shafts.

[0006] The movable adjustment component includes a servo motor, a lead screw is installed at the output end of the servo motor, a sliding plate is threadedly connected to the front of the lead screw, the sliding plate is slidably connected to the support through a slide rail assembly, a photoelectric sensor is arranged on the top of the sliding plate, and the photoelectric sensor is matched and connected with the safety grating switch arranged on the support; the rotating component is arranged in front of the movable adjustment component.

[0007] The rotating assembly includes a longitudinal plate installed in front of the sliding plate, and a second synchronous belt transmission assembly is arranged on one side of the longitudinal plate. The lower part of the second synchronous belt transmission assembly is connected to the keyway shaft through a keyway wheel, and the upper output end passes through the longitudinal plate and is connected to a rotating chuck; an L frame is arranged in the middle part of one side of the longitudinal plate, and the lower end of the L frame is connected to the keyway wheel through a cam bearing follower.

[0008] The rotating chuck comprises a slide cylinder, which is connected to the upper output end of the second synchronous belt transmission assembly through a rotating bearing assembly, and a group of movable clamps are symmetrically arranged on the inner side of the slide cylinder.

[0009] The clamping assembly comprises a bottom plate located in a movable clamp of a rotating clamp, and clamping members are installed on the inner side of the bottom plate.

[0010] The clamping member includes a clamp seat, a clamp connecting member is arranged on the inner and outer sides of the clamp seat, a group of handle seats are arranged in the front of the inner part of the clamp seat, a handle rod is movably mounted on the handle seat, a handle gear is arranged at the end of the handle rod, and the handle gear is an incomplete gear with a fan-shaped structure.

[0011] A rack rod meshing with the handle gear is arranged inside the clamp connector, the rack rod is a "T"-shaped structure, a group of V-groove chucks are arranged at one end of the rack rod, the V-groove chucks are clamped with the rack rod through a U-shaped groove, and the V-groove chucks are provided with anti-slip protrusions arranged in a "V" shape.

[0012] A protective cover is arranged on the outside of the clamp connector, and a tension sensor is arranged inside the protective cover.

[0013] The height measuring assembly includes a base and a top plate, a supporting scale rod is arranged between the base and the top plate, a moving plate is installed on the external sliding sleeve of the supporting scale rod, an indicator plate is arranged in front of the moving plate, a thumb lock screw is arranged in front of the moving plate corresponding to the supporting scale rod, a screw rod penetrating the top plate is arranged inside the other side of the moving plate, and a limit claw for limiting the rotation of the screw rod is installed on the top plate.

[0014] The beneficial effects of the present invention are as follows: the present invention is a cable thermal extension test device. During use, the present invention clamps both ends of the cable to be tested by a clamping assembly, and drives the clamping assembly to move by a movable adjustment assembly, and adjusts the spacing of the clamping assembly, so that the cable to be tested is initially stretched straight, which is convenient for application to cables of different length specifications, and is not limited to the test operation of fixed-distance cables, and has strong practicality; the initially stretched cable to be tested is irradiated with the outer wall of the cable to be tested under the action of the infrared heating tube assembly, so that the surface temperature of the cable to be tested is increased, and then the driving assembly is started. When the movable adjustment assembly drives the clamping assembly to move, the keyway wheel is driven to move synchronously on the keyway shaft through the L frame and the cam bearing follower, so This driving component will drive the rotating component to move through the main shaft, and the rotating component will drive the rotating chuck to rotate, and the rotating chuck will drive the clamping component and the cable to be tested to rotate, and then after synchronous driving transmission, the two groups of clamping components will drive the cable to be tested to rotate synchronously and slowly, so that the outer wall of the cable is evenly heated. After reaching a certain temperature, the cable to be tested is in a static state, and then the height H of the middle part of the cable is measured by the height measuring component, and then the length L2 of the cable in the stretched state can be calculated according to the distance L1 between the two groups of clamps. The difference between L2 and L1 is the stretched length of the cable, which simulates direct sunlight, shortens the cable test time, and improves the accuracy of the test results. The present invention has the advantages of reasonable structure, fast and convenient clamping, firm and reliable clamping, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention.

[0016] Figure 2 For the present invention Figure 1 Schematic diagram of some structures Figure 1 .

[0017] Figure 3 For the present invention Figure 1 Schematic diagram of some structures Figure 2 .

[0018] Figure 4 It is a schematic structural diagram of the clamping assembly of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the clamping member of the present invention.

[0020] Figure 6 It is a schematic structural diagram of the height measuring component of the present invention.

[0021] In the figure: 1, frame 2, support 3, drive assembly 31, reduction motor 32, first synchronous belt transmission assembly 33, main shaft 34, coupling seat 35, keyway shaft 36, bearing seat 4, mobile adjustment assembly 41, servo motor 42, lead screw 43, sliding plate 44, slide rail assembly 45, photoelectric sensor 46, safety grating switch 5, rotating assembly 51, longitudinal plate 52, second synchronous belt transmission assembly 53, keyway wheel 54, L frame 55, cam bearing follower 6, low rotation torque rotary joint 7, rotating chuck 71, slide cylinder 72, mobile fixture 73, Rotating bearing assembly 8, clamping assembly 81, bottom plate 82, clamping part 21, clamp seat 22, clamp connecting part 23, handle seat 24, handle rod 25, handle gear 26, rack rod 27, V-groove chuck 28, U-shaped groove 29, anti-slip protrusion 210, protective cover 211, tension sensor 9, gantry 10, infrared heating tube assembly 11, cable to be tested 12, height measuring assembly 201, base 202, top plate 203, support scale rod 204, moving plate 205, indicator plate 206, thumb lock screw 207, screw 208, limit claw 13, connecting frame. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. Example 1

[0023] like Figure 1-6 As shown, a cable thermal extension test device comprises a frame 1 and a clamping assembly 8, wherein a group of supports 2 are symmetrically arranged on both sides above the frame 1, a driving assembly 3 is arranged in the middle part above the frame 1, a movable adjustment assembly 4 is arranged in front of each of the supports 2, the movable adjustment assembly 4 is slidably connected with the supports 2, a rotating assembly 5 is arranged inside each of the movable adjustment assemblies 4, and the rotating assembly 5 is dynamically connected with the driving assembly 3; the upper and outer sides of the rotating assemblies 5 are connected with a low-rotation torque rotary joint 6 installed on the frame 1 through a connecting frame 13, and a rotating chuck 7 is arranged inside each of the rotating chucks 7, and the clamping assembly 8 is clamped inside the rotating chuck 7; a gantry 9 is arranged behind the support 2, an infrared heating tube assembly 10 is installed on the gantry 9, a cable to be tested 11 is arranged inside the infrared heating tube assembly 10, and both ends of the cable to be tested 11 are respectively connected to the clamping assembly 8.

[0024] The present invention is a cable thermal extension test device. In use, the present invention clamps both ends of a cable to be tested 11 through a clamping assembly 8, and drives the clamping assembly 8 to move through a moving adjustment assembly 4, and adjusts the spacing of the clamping assembly 8, so that the cable to be tested 11 is initially stretched straight, which is convenient for application to cables of different length specifications, and is not limited to the test operation of fixed-distance cables, and has strong practicality; the initially stretched cable 11 to be tested is irradiated with the outer wall of the cable to be tested 11 under the action of the infrared heating tube assembly 10, so that the surface temperature of the cable to be tested 11 is increased, and then the driving assembly 3 is started. When the moving adjustment assembly 4 drives the clamping assembly 8 to move, the keyway wheel 53 is driven to move synchronously on the keyway shaft 35 through the L frame 54 and the cam bearing follower 55, so This driving component 3 will drive the rotating component 5 to move through the main shaft 33, and the rotating component 5 will drive the rotating chuck 7 to rotate, and the rotating chuck 7 will drive the clamping component 8 and the cable to be tested 11 to rotate, and then after synchronous driving transmission, the two groups of clamping components 8 will drive the cable to be tested 11 to rotate synchronously and slowly, so that the outer wall of the cable is evenly heated. After reaching a certain temperature, the cable to be tested 11 is in a static state, and then the height H of the middle part of the cable is measured by the height measuring component 12, and then the length L2 of the cable in the stretched state can be calculated according to the distance L1 between the two groups of clamps. The difference between L2 and L1 is the stretched length of the cable, which simulates direct sunlight, shortens the cable test time, and improves the accuracy of the test results. The present invention has the advantages of reasonable structure, fast and convenient clamping, firm and reliable clamping, and strong practicality. Example 2

[0025] like Figure 1-6 As shown, a cable thermal extension test device comprises a frame 1 and a clamping assembly 8, wherein a group of supports 2 are symmetrically arranged on both sides above the frame 1, a driving assembly 3 is arranged in the middle part above the frame 1, a movable adjustment assembly 4 is arranged in front of each of the supports 2, the movable adjustment assembly 4 is slidably connected with the supports 2, a rotating assembly 5 is arranged inside each of the movable adjustment assemblies 4, and the rotating assembly 5 is dynamically connected with the driving assembly 3; the upper and outer sides of the rotating assemblies 5 are connected with a low-rotation torque rotary joint 6 installed on the frame 1 through a connecting frame 13, and a rotating chuck 7 is arranged inside each of the rotating chucks 7, and the clamping assembly 8 is clamped inside the rotating chuck 7; a gantry 9 is arranged behind the support 2, an infrared heating tube assembly 10 is installed on the gantry 9, a cable to be tested 11 is arranged inside the infrared heating tube assembly 10, and both ends of the cable to be tested 11 are respectively connected to the clamping assembly 8.

[0026] The driving assembly 3 includes a reduction motor 31, and a first synchronous belt transmission assembly 32 is installed at the output end of the reduction motor 31. The first synchronous belt transmission assembly 32 is dynamically connected to a main shaft 33. Keyway shafts 35 are provided on both sides of the main shaft 33. The keyway shafts 35 are connected to the main shaft 33 through a coupling seat 34, and the outer ends of the keyway shafts 35 are provided with bearing seats 36.

[0027] The movable adjustment component 4 includes a servo motor 41, a lead screw 42 is installed at the output end of the servo motor 41, a sliding plate 43 is threadedly connected to the front of the lead screw 42, the sliding plate 43 is slidably connected to the support 2 through a slide rail assembly 44, a photoelectric sensor 45 is arranged on the top of the sliding plate 43, and the photoelectric sensor 45 is matched and connected with a safety grating switch 46 arranged on the support 2; the rotating component 5 is arranged in front of the movable adjustment component 4.

[0028] In this embodiment, the working principle of the movable adjustment component is: after the clamping component clamps the two ends of the cable, the servo motor is started, the servo motor drives the screw to rotate, and the screw drives the sliding plate to move along the support through the slide rail assembly, thereby changing the relative distance between the two clamping components, thereby straightening the cable, so that it can better simulate the cable test; and it can also be adaptively adjusted for cables of different lengths, so that it can be suitable for cables of different length specifications, rather than being limited to the test operation of fixed-distance cables, and has strong practicality.

[0029] The rotating assembly 5 includes a longitudinal plate 51 installed in front of the sliding plate 43, and a second synchronous belt transmission assembly 52 is arranged on one side of the longitudinal plate 51. The lower part of the second synchronous belt transmission assembly 52 is connected to the keyway shaft 35 through a keyway wheel 53, and the upper output end passes through the longitudinal plate 51 and is connected to the rotating chuck 7; an L frame 54 is arranged in the middle of one side of the longitudinal plate 51, and the lower end of the L frame 54 is connected to the keyway wheel 53 through a cam bearing follower 55.

[0030] The rotating chuck 7 includes a slide cylinder 71 , which is connected to the upper output end of the second synchronous belt transmission assembly 52 through a rotating bearing assembly 73 , and a group of movable fixtures 72 are symmetrically arranged inside the slide cylinder 71 .

[0031] In this embodiment, the reduction motor of the driving assembly drives the main shaft to rotate through the first synchronous belt transmission assembly, the main shaft drives the keyway shaft to rotate through the coupling seat, the keyway shaft drives the rotating bearing assembly to rotate through the keyway wheel and the second synchronous belt transmission assembly, thereby realizing the rotation of the rotating chuck, and the rotating chuck drives the clamping assembly and the cable to rotate, so that the infrared heating tube assembly uniformly heats the outer wall of the cable, thereby improving the accuracy and reliability of the test results; when the movable adjustment assembly drives the movable plate to move along the support, the movable plate will drive the L frame to move through the longitudinal plate, because the keyway wheel and the keyway shaft adopt the keyway and key matching method, and the keyway wheel is installed and connected with the second synchronous belt transmission assembly, when the L frame moves, the L frame will drive the keyway wheel to move synchronously along the keyway shaft through the cam bearing follower, thereby synchronously changing the position of the second synchronous belt transmission assembly, and will not cause interference and influence on the action of the rotating assembly driving the rotating chuck to rotate.

[0032] The clamping assembly 8 comprises a bottom plate 81 located in the movable fixture 72 of the rotating clamp 7 , and a clamping member 82 is installed inside the bottom plate 81 .

[0033] The clamping member 82 includes a clamp seat 21, a clamp connecting member 22 is arranged on the inner and outer sides of the clamp seat 21, a group of handle seats 23 are arranged in the front of the inner part of the clamp seat 21, a handle rod 24 is movably mounted on the handle seat 23, a handle gear 25 is arranged at the end of the handle rod 24, and the handle gear 25 is an incomplete gear with a fan-shaped structure.

[0034] A rack rod 26 meshing with the handle gear 25 is arranged inside the clamp connector 22. The rack rod 26 is a "T"-shaped structure. A group of V-groove chucks 27 are arranged at one end of the rack rod 26. The V-groove chucks 27 are clamped with the rack rod 26 through U-shaped grooves 28. The V-groove chucks 27 are arranged with anti-slip protrusions 29 in a "V" shape.

[0035] A protective cover 210 is disposed on the outside of each of the clamp connectors 22 , and a tension sensor 211 is disposed inside each of the protective covers 210 .

[0036] In this embodiment, the working principle of the clamping assembly is: the two ends of the cable are respectively placed in a group of V-groove clamps arranged vertically, and then the handle rod is toggled. The handle rod drives the rack rod to move through the handle gear, and the rack rod drives a group of V-groove clamps arranged vertically to move along the inner cavity of the clamp seat. Under the restriction of the inner cavity, a group of V-groove clamps arranged vertically will approach each other to clamp the cable, and another group of V-groove clamps arranged vertically are internally provided with "V"-shaped anti-slip protrusions, which effectively improve the clamping effect of the cable and ensure that the cable is clamped firmly and reliably during the test, so that the test can proceed smoothly.

[0037] The height measuring assembly 12 includes a base 201 and a top plate 202, a supporting scale rod 203 is arranged between the base 201 and the top plate 202, a moving plate 204 is installed on the outer sliding sleeve of the supporting scale rod 203, an indicating plate 205 is arranged in front of the moving plate 204, a thumb lock screw 206 is arranged in front of the moving plate 204 corresponding to the supporting scale rod 203, a screw rod 207 penetrating the top plate 202 is arranged inside the other side of the moving plate 204, and a limit claw 208 for limiting the rotation of the screw rod 207 is installed on the top plate 202.

[0038] The present invention is a cable thermal extension test device. In use, the present invention clamps both ends of a cable to be tested 11 through a clamping assembly 8, and drives the clamping assembly 8 to move through a moving adjustment assembly 4, and adjusts the spacing of the clamping assembly 8, so that the cable to be tested 11 is initially stretched straight, which is convenient for application to cables of different length specifications, and is not limited to the test operation of fixed-distance cables, and has strong practicality; the initially stretched cable 11 to be tested is irradiated with the outer wall of the cable to be tested 11 under the action of the infrared heating tube assembly 10, so that the surface temperature of the cable to be tested 11 is increased, and then the driving assembly 3 is started. When the moving adjustment assembly 4 drives the clamping assembly 8 to move, the keyway wheel 53 is driven to move synchronously on the keyway shaft 35 through the L frame 54 and the cam bearing follower 55, so This driving component 3 will drive the rotating component 5 to move through the main shaft 33, and the rotating component 5 will drive the rotating chuck 7 to rotate, and the rotating chuck 7 will drive the clamping component 8 and the cable to be tested 11 to rotate, and then after synchronous driving transmission, the two groups of clamping components 8 will drive the cable to be tested 11 to rotate synchronously and slowly, so that the outer wall of the cable is evenly heated. After reaching a certain temperature, the cable to be tested 11 is in a static state, and then the height H of the middle part of the cable is measured by the height measuring component 12, and then the length L2 of the cable in the stretched state can be calculated according to the distance L1 between the two groups of clamps. The difference between L2 and L1 is the stretched length of the cable, which simulates direct sunlight, shortens the cable test time, and improves the accuracy of the test results. The present invention has the advantages of reasonable structure, fast and convenient clamping, firm and reliable clamping, and strong practicality.

Claims

1. A cable thermal extension test device, comprising a frame and a clamping assembly, characterized in that: A group of supports are symmetrically arranged on both sides above the frame, a driving assembly is arranged in the middle part above the frame, a movable adjustment assembly is arranged in front of the supports, the movable adjustment assembly is slidably connected to the supports, a rotating assembly is arranged on the inner side of the movable adjustment assembly, and the rotating assembly is dynamically connected to the driving assembly; the outer sides above the rotating assemblies are connected to the low-rotation torque rotating joints installed on the frame through connecting frames, and rotating chucks are arranged on the inner sides, and a clamping assembly is clamped inside the rotating chucks; a gantry is arranged behind the supports, an infrared heating tube assembly is installed on the gantry, a cable to be tested is arranged inside the infrared heating tube assembly, and both ends of the cable to be tested are respectively connected to the clamping assemblies.

2. A cable thermal extension test device as claimed in claim 1, characterized in that: The driving assembly includes a reduction motor, a first synchronous belt transmission assembly is installed at the output end of the reduction motor, the first synchronous belt transmission assembly is dynamically connected to the main shaft, keyway shafts are arranged on both sides of the main shaft, the keyway shafts are connected to the main shaft through coupling seats, and bearing seats are arranged at the outer ends of the keyway shafts.

3. A cable thermal extension test device as claimed in claim 2, characterized in that: The movable adjustment component includes a servo motor, a lead screw is installed at the output end of the servo motor, a sliding plate is threadedly connected to the front of the lead screw, the sliding plate is slidably connected to the support through a slide rail assembly, a photoelectric sensor is arranged on the top of the sliding plate, and the photoelectric sensor is matched and connected with the safety grating switch arranged on the support; the rotating component is arranged in front of the movable adjustment component.

4. A cable thermal extension test device as claimed in claim 3, characterized in that: The rotating assembly includes a longitudinal plate installed in front of the sliding plate, and a second synchronous belt transmission assembly is arranged on one side of the longitudinal plate. The lower part of the second synchronous belt transmission assembly is connected to the keyway shaft through a keyway wheel, and the upper output end passes through the longitudinal plate and is connected to a rotating chuck; an L frame is arranged in the middle part of one side of the longitudinal plate, and the lower end of the L frame is connected to the keyway wheel through a cam bearing follower.

5. A cable thermal extension test device as claimed in claim 4, characterized in that: The rotating chuck comprises a slide cylinder, which is connected to the upper output end of the second synchronous belt transmission assembly through a rotating bearing assembly, and a group of movable clamps are symmetrically arranged on the inner side of the slide cylinder.

6. A cable thermal extension test device as claimed in claim 1, characterized in that: The clamping assembly comprises a bottom plate located in a movable clamp of a rotating clamp, and clamping members are installed on the inner side of the bottom plate.

7. A cable thermal extension test device as claimed in claim 6, characterized in that: The clamping member includes a clamp seat, a clamp connecting member is arranged on the inner and outer sides of the clamp seat, a group of handle seats are arranged in the front of the inner part of the clamp seat, a handle rod is movably mounted on the handle seat, a handle gear is arranged at the end of the handle rod, and the handle gear is an incomplete gear with a fan-shaped structure.

8. A cable thermal extension test device as claimed in claim 7, characterized in that: A rack rod meshing with the handle gear is arranged inside the clamp connector, the rack rod is a "T"-shaped structure, a group of V-groove chucks are arranged at one end of the rack rod, the V-groove chucks are clamped with the rack rod through a U-shaped groove, and the V-groove chucks are arranged with anti-slip protrusions in a "V" shape.

9. A cable thermal extension test device as claimed in claim 8, characterized in that: A protective cover is arranged on the outside of the clamp connector, and a tension sensor is arranged inside the protective cover.

10. A cable thermal extension test device as claimed in claim 1, characterized in that: The height measuring assembly includes a base and a top plate, a supporting scale rod is arranged between the base and the top plate, a moving plate is installed on the external sliding sleeve of the supporting scale rod, an indicator plate is arranged in front of the moving plate, a thumb lock screw is arranged in front of the moving plate corresponding to the supporting scale rod, a screw rod penetrating the top plate is arranged inside the other side of the moving plate, and a limit claw for limiting the rotation of the screw rod is installed on the top plate.

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