Resistance constant temperature detection device based on cable test

Abstract

The invention relates to the technical field of resistance constant-temperature detection, and discloses a cable test-based resistance constant-temperature detection device, which comprises a constant-temperature bath, a heating pipe arranged in the constant-temperature bath, water filled in the constant-temperature bath, and a detection unit arranged in the constant-temperature bath, the detection unit comprises two lifting parts symmetrically arranged on the inner wall of the thermostatic bath, and the lifting parts comprise two lifting assemblies arranged on the inner wall of the thermostatic bath, a lifting plate arranged at the bottoms of one sides of the two lifting assemblies, clamping parts symmetrically arranged on the two sides of the lifting plate, and a bending part arranged in the middle of the lifting plate; the clamping component comprises a clamping assembly arranged on the top of one side of the lifting plate and a tightening assembly arranged on the clamping assembly. Resistance testing of the cable under different bending degrees is achieved through the bending part, the bending part is rotated to push the middle of the cable so that the cable can be bent, and the change conditions of the resistance under different bending states are tested after the cable is adjusted to different bending degrees.

Description

Technical Field

[0001] The invention relates to the technical field of resistance constant temperature detection, and in particular to a resistance constant temperature detection device based on cable test. Background Art

[0002] The resistance value of the cable will be affected by many factors, including material, length, cross-sectional area, temperature, humidity, etc. When the ambient temperature changes, the material properties of the cable, the state of the insulation layer, and the conductivity of the surrounding medium may change, thereby affecting the resistance value of the cable. If the resistance value of the cable changes significantly, it may cause the cable to overheat, overload or other failures, and even cause safety accidents in serious cases. Therefore, it is very necessary to perform constant temperature detection on the resistance value of the cable. This can help us discover possible problems with the cable in a timely manner and take appropriate measures to repair or replace it, thereby ensuring the safe operation of the cable and reducing the occurrence of failures.

[0003] Common constant temperature detection devices usually use a water bath or oil bath for constant temperature detection. During the detection process, it is necessary to ensure that the temperature of the resistor is constant. The constant temperature water bath can provide precise water temperature and environmental control, which is conducive to ensuring the accuracy of the resistor test. The environment and temperature of the constant temperature water bath are stable, making the test results highly repeatable.

[0004] When the existing constant temperature water bath device tests the resistance of the cable, it usually clamps the two ends of the cable to the clamping devices on both sides. The cable can only be straightened and measured, but it cannot measure the resistance of the cable after local bending and different bending degrees, that is, it cannot detect the change in the internal resistance of the cable after bending at a certain place. In the daily layout and laying process of the cable, it is inevitable that the cable will be bent at a certain place. After bending, the length of the entire cable and the cross-sectional size at a certain place will be changed. During long-term use, the temperature distribution and stress distribution at the bending place will be uneven. If the temperature distribution inside the cable changes when it is bent, it may affect the thermal expansion coefficient, antioxidant performance and other aspects of the cable. During constant temperature testing, the changes in these factors may have a greater impact on the test results, so it is necessary to consider these performance changes of the cable under different bending states. Understanding the performance of the cable in a bent state can help us better evaluate its reliability, safety and life in actual use. Summary of the invention

[0005] In view of the problem in the prior art that the resistance of the cable cannot be detected under different bending degrees, a resistance constant temperature detection device based on cable test is proposed.

[0006] Its purpose is to detect the cable resistance under different bending degrees and understand the different performance of the cable under different bending degrees, which can help us better evaluate its reliability, safety and lifespan in actual use.

[0007] The technical solution of the present invention is a resistance constant temperature detection device based on cable test, comprising a constant temperature bath, a heating pipe arranged in the constant temperature bath, and water filled in the constant temperature bath, and also comprising a detection unit arranged in the constant temperature bath; The detection unit includes two lifting components symmetrically arranged on the inner wall of the thermostatic bath, and the lifting components include two lifting assemblies arranged on the inner wall of the thermostatic bath, and a lifting plate arranged at the bottom of one side of the two lifting assemblies, clamping components symmetrically arranged on both sides of the lifting plate, and a bending component arranged in the middle of the lifting plate; The lifting component is used to drive the cable to descend and sink into the water in the constant temperature tank during the constant temperature detection of the cable, the clamping component is used to straighten the cable during the detection, and the bending component is used to bend the cable to detect the resistance performance of the cable when it is bent and at different bending angles; The clamping component includes a clamping assembly arranged on the top of one side of the lifting plate, and a tensioning assembly arranged on the clamping assembly; The clamping assembly includes a clamping seat arranged on one side of the top of the lifting plate, a clamping handle arranged on the clamping seat, a clamping screw arranged at the bottom of the clamping handle, an upper clamping block arranged at the bottom of the clamping screw, a lower clamping block arranged at the bottom of the upper clamping block, a movable screw arranged at the bottom of the lower clamping block, and a movable handle arranged on one side of the movable screw, and clamping holes that can be staggered and plugged in are opened on the opposite sides of the upper clamping block and the lower clamping block, and the tensioning assembly is arranged at the bottom of the clamping seat.

[0008] Furthermore, the tensioning assembly includes two limit blocks arranged at the bottom of the clamping seat, matching two limit slots opened on the lifting plate, and the limit blocks are slidably connected in the limit slots, and tensioning springs are respectively arranged on one side of each limit block, and one side of the tensioning spring is fixedly connected to the limit slot.

[0009] Furthermore, the limiting groove and the limiting block are both trapezoidal in shape, narrow at the top and wide at the bottom.

[0010] Furthermore, a through hole penetrating the bottom of the lifting plate is formed in the middle of the two limiting grooves.

[0011] Further, the bending component includes a bending component disposed in the middle portion of the lifting plate, and an adapting component disposed on the bending component; The bending assembly includes a mounting seat arranged at the top of one side of the lifting plate, a rotating handle arranged at the top of the mounting seat, a transmission member 1 arranged at the bottom of the rotating handle, a transmission member 2 arranged at one side of the transmission member 1, the transmission member 2 is rotatably mounted in the inner cavity of the lifting plate, a moving ring arranged on the transmission member 2, a bending rod 1 arranged at the top of the moving ring, connecting rods symmetrically hingedly arranged on both sides of the moving ring, bending rods 2 respectively corresponding to the top of one side of the connecting rod, bending wheels 1 and 2 respectively arranged on the top of the bending rod 1 and the two bending rods 2 through adaptation components, a vertical hole opened at the top of the lifting plate, transverse holes symmetrically opened on both sides of the vertical hole, and abutment grooves respectively opened in the middle parts of the bending rod 1 and the bending rod 2, and the two abutment grooves are respectively connected with the transverse hole and the vertical hole in a limited sliding manner.

[0012] Furthermore, the adaptation component includes an adaptation spring 1 arranged in the top of the first bending rod, a pulling plate arranged at the bottom of the first adaptation spring, and the middle part of the pulling plate passes through the middle part of the first bending rod and is slidably connected to a side wall of the bending rod, and the pulling plate is rotationally connected to the middle part of the bending wheel, an adaptation spring 2 arranged in the top of the second bending rod, a downward pressure rod arranged at the top of the second adaptation spring, and the top of the downward pressure rod is rotationally connected to the middle part of the second bending wheel.

[0013] Furthermore, a bending groove 1 is provided in the middle of the bending wheel 1, and a bending groove 2 is provided in the middle of the bending wheel 2. The bending groove 1 is concave upward, and the bending groove 2 is concave downward.

[0014] Furthermore, the bending wheel 1 is lower than the two bending wheels 2 in the vertical direction.

[0015] Furthermore, a filtering hole for water to flow out is provided at the bottom of the lifting plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The resistance test of the cable under different bending degrees is realized by the bending component. The bending component is rotated to push the middle part of the cable to bend it, and after adjusting to different bending degrees, the change of resistance under different bending states is tested.

[0017] 2. The movable handle is used to drive the lower clamping block to move left and right, so that the clamping holes on the lower clamping block can be staggered to different degrees with the clamping holes on the upper clamping block, which can be used to meet the clamping requirements of cables of different thicknesses and materials when clamping.

[0018] 3. The bending assembly is set up to realize the rapid adjustment of the bending angle during the test, forming a rapid adjustment of the bending angle within a larger range, and both the bending wheel 1 and the bending wheel 2 can rotate, reducing the resistance during the adjustment process and improving the adjustment efficiency of the test.

[0019] 4. The adaptable component is used to adapt to the pushing and clamping requirements of cables of different thicknesses during adjustment. When testing cables of different thicknesses, the adaptive spring 1 and the adaptive spring 2 can make the cables tend to be squeezed toward the middle, which can not only meet the requirements of different pushing heights when testing cables of different thicknesses, but also prevent the cables from slipping when being pushed and bent, thereby improving the stability during the pushing and bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the detection unit of the present invention; Figure 3 It is a bottom view structural schematic diagram of the detection unit of the present invention; Figure 4 It is a schematic diagram of the overall structure of the clamping assembly and the tensioning assembly of the present invention; Figure 5 It is a schematic diagram of the overall structure of the bending component of the present invention; Figure 6 Another exploded structural schematic diagram of the bending component of the present invention; Figure 7 It is a schematic diagram of the internal exploded structure of the bending rod 1 and the bending wheel 1 of the present invention after being cut away; Figure 8 It is a schematic diagram of the overall structure of the height difference between the bending wheel 1 and the bending wheel 2 in the vertical direction of the present invention; Fig. 9 It is a schematic diagram of the structure of the bending assembly of the present invention in a moving state; Fig.10 It is a schematic diagram of the movement direction of the bending component of the present invention in the initial reset state.

[0021] In the figure: Constant temperature bath; 11. Heating tube; 2. Lifting assembly; 3. Lifting plate; 4. Clamping assembly; 41. Clamping seat; 42. Clamping screw; 43. Upper clamping block; 44. Lower clamping block; 45. Moving screw; 5. Tensioning assembly; 51. Limiting block; 52. Limiting groove; 53. Tensioning spring; 54. Through hole; 6. Bending assembly; 61. Turning handle; 62. Transmission member 1; 63. Transmission member 2; 64. Moving ring; 65. Bending rod 1; 66. Bending rod 2; 67. Connecting rod; 68. Bending wheel 1; 69. Bending wheel 2; 610. Vertical hole; 611. Horizontal hole; 612. Abutment groove; 7. Adaptation assembly; 71. Adaptation spring 1; 72. Pulling plate; 73. Adaptation spring 2; 74. Pressing rod; 75. Bending groove 1; 76. Bending groove 2; 77. Filter hole. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] Example 1, reference Figure 1-Figure 10 , which is the first embodiment of the present invention, provides a resistance constant temperature detection device based on cable test, including a constant temperature bath 1, a heating tube 11 installed in the constant temperature bath 1, and water filled in the constant temperature bath 1, the heating tube 11 can be used to heat the water in the constant temperature bath 1 to a certain constant temperature (this is the prior art and will not be described in detail), and also includes a detection unit installed in the constant temperature bath 1; the detection unit includes two lifting components symmetrically installed on the inner wall of the constant temperature bath 1, the lifting components include two lifting assemblies 2 installed on the inner wall of the constant temperature bath 1, and a lifting plate 3 installed at the bottom of one side of the two lifting assemblies 2, clamping components symmetrically installed on both sides of the lifting plate 3, and a bending component installed in the middle of the lifting plate 3; the lifting component is used to drive the cable to descend and sink into the water in the constant temperature bath 1 during cable constant temperature detection, and the clamping component is used to straighten the cable during detection and bend it. The bending part is used to bend the cable to detect the bending of the cable and the resistance performance at different bending angles; the clamping part includes a clamping assembly 4 installed on the top of one side of the lifting plate 3, and a tightening assembly 5 installed on the clamping assembly 4; the clamping assembly 4 includes a clamping seat 41 slidably connected to one side of the top of the lifting plate 3, a clamping handle rotatably connected to the clamping seat 41, a clamping screw 42 fixedly connected to the bottom of the clamping handle and threaded through the clamping seat 41, an upper clamping block 43 fixedly connected to the bottom of the clamping screw 42, a lower clamping block 44 abutting the bottom of the upper clamping block 43, a moving screw 45 threadedly connected to the bottom of the lower clamping block 44, and a moving handle fixedly connected to one side of the moving screw 45, the upper clamping block 43 and the lower clamping block 44 are provided with clamping holes that can be staggered and plugged in on opposite sides, and the tightening assembly 5 is installed at the bottom of the clamping seat 41.

[0024] Specifically, when the cable is tested for resistance under constant temperature, the bending component is reset first, the clamping handles on both sides are rotated so that the clamping screw 42 drives the upper clamping block 43 to move upward, and then the two ends of the cable are respectively placed between the upper clamping block 43 and the lower clamping block 44, and then the clamping handle is rotated in the opposite direction, and the upper clamping block 43 and the lower clamping block 44 clamp the two ends of the cable to make it straight, and then the lifting assembly 2 and the lifting plate 3 are driven by the built-in motor to drive the cable to be immersed in the constant temperature water bath, and the resistance of a certain constant temperature cable in a straight state can be tested first; when it is necessary to test the resistance of the cable in a bent state, the bending component is rotated to push the middle part of the cable to bend it. After adjusting to different bending degrees, the change of resistance in different bending states is tested. The setting of the moving handle is used to drive the left and right movement of the lower clamping block 44, so that the clamping hole on the lower clamping block 44 can present different degrees of staggered degree with the clamping hole on the upper clamping block 43, which can be used to meet the clamping degree requirements of cables of different thicknesses and materials when clamping.

[0025] Reference Figure 1-Figure 4 The tensioning assembly 5 includes two limit blocks 51 fixedly connected to the bottom of the clamping seat 41, matching two limit slots 52 opened on the lifting plate 3, and the limit blocks 51 are slidably connected in the limit slots 52, and tensioning springs 53 are respectively fixedly connected to one side of each limit block 51, and one side of the tensioning spring 53 is fixedly connected to the limit slot 52.

[0026] Specifically, the tensioning assembly 5 is used to meet the tensioning requirements of the bending component when performing a bending test on the cable. When the tightened cable is pushed and bent by the bending component, both ends of the cable will be pulled, so that the clamping seat 41 drives the limit block 51 at the bottom to move, and the limit block 51 moves in the limit groove 52 and pulls the tensioning spring 53, so that the cable always remains in a straight state during the test to avoid affecting the test of the cable resistance.

[0027] Reference Figure 4 The limiting groove 52 and the limiting block 51 are both trapezoidal in shape, narrow at the top and wide at the bottom.

[0028] Specifically, the shapes of the limiting groove 52 and the limiting block 51 are designed to limit the clamping seat 41 during movement, thereby improving the stability of the clamping seat 41 during movement.

[0029] Reference Figure 3 A through hole 54 penetrating the bottom of the lifting plate 3 is formed in the middle of the two limiting grooves 52 .

[0030] Specifically, the through hole 54 is used to discharge the water that enters the lifting plate 3 after it is raised, so as to prevent the water from being stored in the lifting plate 3 for a long time and causing the tension spring 53 to rust and be damaged, thereby increasing the service life of the internal parts of the device.

[0031] Example 2, reference Figure 1-Figure 10 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: the bending component includes a bending component 6 installed in the middle of the lifting plate 3, and an adapting component 7 installed on the bending component 6; the bending component 6 includes a mounting seat fixedly connected to the top of one side of the lifting plate 3, a rotating handle 61 rotatably connected to the top of the mounting seat, a transmission member 1 62 fixedly connected to the bottom of the rotating handle 61, a transmission member 2 63 meshingly connected to one side of the transmission member 1 62, the transmission member 2 63 is rotatably installed in the inner cavity of the lifting plate 3, a moving ring 64 threadedly connected to the transmission member 2 63, and a moving ring 64 fixedly connected to the top of the moving ring 64. The bending rod 1 65 at the top, the connecting rods 67 symmetrically hinged on both sides of the moving ring 64, the bending rods 2 66 respectively connected to the top of the back side of the two connecting rods 67, the bending wheels 1 68 and 2 69 respectively connected to the top of the bending rod 1 65 and the two bending rods 2 66 through the adaptation component 7, the vertical hole 610 opened at the top of the lifting plate 3, the transverse holes 611 symmetrically opened on both sides of the vertical hole 610, and the abutment grooves 612 respectively opened in the middle of the bending rod 1 65 and the bending rod 2 66, and the two abutment grooves 612 are respectively connected to the transverse hole 611 and the vertical hole 610 in a limited sliding manner.

[0032] Specifically, when the cable is bent, the handle 61 is driven to rotate, so that the transmission member 1 62 drives the transmission member 2 63 to rotate, and the transmission member 2 63 rotates to drive the moving ring 64 to move on the transmission member 2 63. When the moving ring 64 moves, it drives the bending rod 1 65 on the top to move synchronously in the vertical hole 610, and the connecting rods 67 on both sides will be pulled synchronously, thereby driving the bending rods 2 66 on both sides to move in the transverse holes 611. Since the abutment grooves 612 provided in the middle of the bending rod 1 65 and the bending rod 2 66 can be just engaged and limited by the transverse holes 611 and the vertical holes 610, the bending rod 1 65 and the bending rod 2 66 will move vertically and horizontally in the vertical holes 610 and the transverse holes 611 respectively, so that The bending wheel 1 68 and the bending wheel 2 69 at the top thereof move synchronously, and the bending wheel 1 68 pushes the cable from one side of the cable to pass through the connecting line position of the two bending wheels 2 69, so that the middle part of the cable is bent. The longer the distance that the bending wheel 1 68 moves, the greater the degree of bending of the cable. Moreover, since the two bending wheels 2 69 and the bending wheel are connected by the two connecting rods 67, they form an isosceles triangle, that is, when the bending wheel 1 68 continues to move, the two bending wheels 2 69 will gradually move closer to the middle, so that the cable can be bent quickly to form a larger bending angle. Similarly, when the bending wheel 1 68 is driven to reset and approach the mounting seat, its two sides will also expand quickly to form a smaller bending angle. If the bending wheels 2 69 on both sides are fixed, the movement resistance of the cable will be large when the single bending wheel 1 68 is pushed for bending, and thinner cables will be easily broken, thereby enhancing safety during the test. Such a setting facilitates rapid adjustment of the bending angle during the test, allowing rapid adjustment of the bending angle within a larger range, and both the bending wheel 1 68 and the bending wheel 2 69 can rotate, thereby reducing resistance during the adjustment process and improving the adjustment efficiency of the test.

[0033] Reference Figure 6-Figure 7 The adaptation component 7 includes an adaptation spring 71 fixedly connected to the top of the bending rod 65, a pulling plate 72 fixedly connected to the bottom of the adaptation spring 71, and the middle part of the pulling plate 72 passes through the middle part of the bending rod 65 and is slidably connected to the side wall of the bending rod 65, and the pulling plate 72 is rotatably connected to the middle part of the bending wheel, an adaptation spring 73 fixedly connected to the top of the bending rod 66, a downward pressure rod 74 fixedly connected to the top of the adaptation spring 73, and the top of the downward pressure rod 74 is rotatably connected to the middle part of the bending wheel 69.

[0034] Specifically, the adaptation component 7 is used to adapt to the pushing requirements of cables of different thicknesses during adjustment. When testing cables of different thicknesses, since the height of the lower clamping block 44 remains unchanged, the heights of the entire cables of different thicknesses after clamping are different. The adaptation spring 1 71 is used to push the bending wheel 1 68 from top to bottom to squeeze the cable, and the two adaptation springs 2 73 are used to push the two bending wheels 2 69 from bottom to top to squeeze the cable, so that the cable can be squeezed toward the middle, which can not only meet the different pushing height requirements when testing cables of different thicknesses, but also prevent the cable from slipping when being pushed to bend, thereby improving the stability during the pushing and bending process. When the bending wheel 1 68 is squeezed, the bending wheel 1 68 drives the pulling plate 72 to squeeze the adaptation spring 1 71, and when the bending wheel 2 69 is squeezed, the bending wheel 2 69 pushes the lower pressure rod 74 downward and compresses the adaptation spring 2 73.

[0035] Reference Figure 8 A bending groove 1 75 is provided in the middle of the bending wheel 1 68 , and a bending groove 2 76 is provided in the middle of the bending wheel 2 69 . The bending groove 1 75 is concave upward, and the bending groove 2 76 is concave downward.

[0036] Specifically, the shape design of the bending groove 1 75 and the bending groove 2 76 is used to improve the squeezing and limiting effect of the cable during the pushing process, so that the cable will not escape from the pushing and squeezing of the bending wheel 1 68 and the bending wheel 2 69.

[0037] Reference Figure 8 , the bending wheel 1 68 is lower than the two bending wheels 2 69 in the vertical direction.

[0038] Specifically, the bending wheel 1 68 and the two bending wheels 2 69 exert relative forces on the cable, thereby offsetting a portion of the balancing force acting on the cable.

[0039] Reference Figure 3 A filter hole 77 for water to flow out is provided at the bottom of the lifting plate 3.

[0040] Specifically, the filter hole 77 is used to discharge the water entering the lifting plate 3. The remaining structure is the same as that of the first embodiment.

[0041] In summary, the working principle of the present invention is as follows: the cable clamped on both sides is lowered into the water of the thermostatic bath 1 by a lifting component, and after being heated to a certain temperature by a heating tube 11, the resistance of the cable is tested. When the resistance change of the cable in different bending states is tested, the handle 61 is rotated to drive the transmission member 1 62 and the transmission member 2 63 to rotate, so that the movable ring 64 drives the connecting rods 67 on both sides to move, so that the bending rod 1 65 and the two bending rods 2 66 move in the vertical hole 610 and the horizontal hole 611 respectively, so that the bending wheel 1 68 can push the cable, and the two bending wheels 2 69 are driven synchronously, so that the cable can be pushed to bend into different bending states. At this time, the two ends of the cable pull the clamping seat 41, and the limit block 51 at the bottom of the clamping seat 41 pulls the tensioning spring 53, so that the cable always remains in a straight state when being pushed to bend, so as to avoid affecting the accuracy of the cable resistance test result.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A resistance constant temperature detection device based on cable testing, comprising a constant temperature bath (1), a heating tube (11) arranged in the constant temperature bath (1), and water filled in the constant temperature bath (1), characterized in that: It also includes a detection unit arranged in the constant temperature bath (1); The detection unit comprises two lifting components symmetrically arranged on the inner wall of the thermostatic bath (1), the lifting components comprising two lifting assemblies (2) arranged on the inner wall of the thermostatic bath (1), a lifting plate (3) arranged at the bottom of one side of the two lifting assemblies (2), clamping components symmetrically arranged on both sides of the lifting plate (3), and a bending component arranged in the middle of the lifting plate (3); The lifting component is used to drive the cable to descend and sink into the water in the constant temperature tank (1) during the cable constant temperature test, the clamping component is used to straighten the cable during the test, and the bending component is used to bend the cable to test the resistance performance of the cable when it is bent and at different bending angles; The clamping component comprises a clamping assembly (4) arranged on the top of one side of the lifting plate (3), and a tensioning assembly (5) arranged on the clamping assembly (4); The clamping assembly (4) comprises a clamping seat (41) arranged on one side of the top of the lifting plate (3), a clamping handle arranged on the clamping seat (41), a clamping screw (42) arranged at the bottom of the clamping handle, an upper clamping block (43) arranged at the bottom of the clamping screw (42), a lower clamping block (44) arranged at the bottom of the upper clamping block (43), a movable screw (45) arranged at the bottom of the lower clamping block (44), and a movable handle arranged on one side of the movable screw (45), and the upper clamping block (43) and the lower clamping block (44) are provided with clamping holes that can be staggered and plugged in on opposite sides, and the tensioning assembly (5) is arranged at the bottom of the clamping seat (41).

2. The resistance constant temperature detection device based on cable test according to claim 1 is characterized in that: The tensioning assembly (5) comprises two limit blocks (51) arranged at the bottom of the clamping seat (41), two limit slots (52) matched with each other and provided on the lifting plate (3), and the limit blocks (51) are slidably connected in the limit slots (52), and a tensioning spring (53) is respectively arranged on one side of each limit block (51), and one side of the tensioning spring (53) is fixedly connected to the limit slot (52).

3. The resistance constant temperature detection device based on cable test according to claim 2 is characterized in that: The limiting groove (52) and the limiting block (51) are both in the shape of a trapezoid that is narrow at the top and wide at the bottom.

4. The resistance constant temperature detection device based on cable test according to claim 3 is characterized in that: A through hole (54) penetrating the bottom of the lifting plate (3) is provided in the middle of each of the two limiting grooves (52).

5. The resistance constant temperature detection device based on cable test according to claim 1 is characterized in that: The bending component comprises a bending component (6) arranged in the middle of the lifting plate (3), and an adapting component (7) arranged on the bending component (6); The bending assembly (6) comprises a mounting seat arranged at the top of one side of the lifting plate (3), a rotating handle (61) arranged at the top of the mounting seat, a transmission member 1 (62) arranged at the bottom of the rotating handle (61), a transmission member 2 (63) arranged at one side of the transmission member 1 (62), the transmission member 2 (63) being rotatably mounted in the inner cavity of the lifting plate (3), a moving ring (64) arranged on the transmission member 2 (63), a bending rod 1 (65) arranged at the top of the moving ring (64), and connecting rods (67) symmetrically hingedly arranged on both sides of the moving ring (64), and connecting rods (67) respectively arranged on the connecting rods. (67) The second bending rod (66) at the top of one side, the first bending wheel (68) and the second bending wheel (69) respectively arranged at the top of the first bending rod (65) and the top of the two second bending rods (66) through the adaptation component (7), the vertical hole (610) opened at the top of the lifting plate (3), the transverse holes (611) symmetrically opened on both sides of the vertical hole (610), and the abutment grooves (612) respectively opened in the middle of the first bending rod (65) and the second bending rod (66), and the two abutment grooves (612) are respectively connected to the transverse hole (611) and the vertical hole (610) in a limited sliding manner.

6. The resistance constant temperature detection device based on cable test according to claim 5 is characterized in that: The adaptable assembly (7) comprises an adaptable spring (71) disposed in the top of the first bending rod (65), a pulling plate (72) disposed at the bottom of the first adaptable spring (71), wherein the middle portion of the pulling plate (72) passes through the middle portion of the first bending rod (65) and is slidably connected to the side wall of the first bending rod (65), and the pulling plate (72) is rotationally connected to the middle portion of the bending wheel, an adaptable spring (73) disposed in the top of the second bending rod (66), and a pressing rod (74) disposed at the top of the second adaptable spring (73), and the top portion of the pressing rod (74) is rotationally connected to the middle portion of the second bending wheel (69).

7. The resistance constant temperature detection device based on cable test according to claim 6 is characterized in that: The first bending wheel (68) has a first bending groove (75) in the middle, and the second bending wheel (69) has a second bending groove (76) in the middle. The first bending groove (75) is concave upward, and the second bending groove (76) is concave downward.

8. The resistance constant temperature detection device based on cable test according to claim 7 is characterized in that: The bending wheel 1 (68) is lower than the two bending wheels 2 (69) in the vertical direction.

9. The resistance constant temperature detection device based on cable test according to claim 1, characterized in that: The bottom of the lifting plate (3) is provided with a filtering hole (77) for water to flow out.

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