High and low temperature cable torsion testing device

Abstract

The invention provides a high and low temperature cable torsion testing device, which belongs to the field of cable testing devices and comprises a Dewar tank, a cooling device, a heating device, a fan device, a cable fixing tool, a tool fixing device, a flange cover plate and a tool driving device. The flange cover plate covers the Dewar tank, and the cooling device, the heating device, the tool driving device and the fan device are all inserted into the flange cover plate; the tool driving device is installed in the Dewar tank, the tool fixing device is installed in the Dewar tank, the cable fixing tool comprises an upper tool and a lower tool, the upper tool is installed on the tool driving device, the lower tool is installed on the tool fixing device, the upper tool and the lower tool are both located in the Dewar tank, and the lower tool is located under the upper tool; and the upper end of the cable fixing device is connected with the flange cover plate and is positioned in the Dewar tank. The invention aims to solve the problem that the prior art cannot meet the requirements of cable torsional fatigue tests in high and low temperature environments. The torsion testing device has the technical effects that torsion testing can be carried out in low-temperature, high-temperature and high-low-temperature alternating environments.

Description

Technical Field

[0001] The present invention relates to the technical field of cable testing devices, and in particular to a high and low temperature cable torsion testing device. Background Art

[0002] Wires and cables are important wire products for transmitting electrical energy and information. Automatic control units, actuators, and sensor units all need to be interconnected through cables to exchange information. Cables may need to face frequent rotation, torsion, etc. during actual use. When the rotation, torsion, etc. reach the torsion life of the cable, the cable will experience wear and breakage of the insulation layer or internal wires, which will lead to interruption of transmission signals and power transmission. In complex environments, such as aerospace and other fields, wires and cables often need to face the test of high and low temperature alternating environments. Therefore, it is necessary to carry out torsion tests on wires and cables in high and low temperature alternating environments.

[0003] At present, conventional cable torsion test equipment can carry out cable torsion tests at room temperature or high temperature environments, but cannot meet the needs of cable torsion fatigue tests in low temperature or high-low temperature alternating temperature environments. Summary of the invention

[0004] The present invention provides a high and low temperature cable torsion test device, which is used to solve the defect that the prior art cannot meet the cable torsion fatigue test requirements in a low temperature to high and low temperature alternating temperature environment, and realizes that the cable can be torsion tested in low temperature, high temperature and high and low temperature alternating environments.

[0005] The present invention provides a high and low temperature cable torsion test device, comprising a dewar tank, a cooling device, a heating device, a fan device, a cable fixing tool, a tool fixing device, a flange cover plate and a tool driving device; the flange cover plate is covered on the dewar tank, The cooling device, heating device, tooling drive device and fan device are all inserted on the flange cover; The tooling fixture is installed in the Dewar tank, and the cable fixing tooling includes an upper tooling and a lower tooling. The upper tooling is installed on the tooling driving device, and the lower tooling is installed on the tooling fixture. Both the upper tooling and the lower tooling are located in the Dewar tank, and the lower tooling is located directly below the upper tooling. The upper end of the cable fixing device is connected to the flange cover plate and the cable fixing device is located in the Dewar tank. The cooling device is used for cooling the Dewar tank. The heating device is used for heating the Dewar tank. The fan device is used for uniform cooling or heating in the Dewar tank.

[0006] According to the high and low temperature cable torsion test device of the present invention, the coordinated arrangement of the heating device, the cooling device and the tooling driving device enables the cable to be subjected to torsion tests in both high temperature and low temperature environments, and also meets the cable torsion fatigue test requirements in an alternating temperature environment within the temperature range of -269°C to 200°C. The arrangement of the fan device enables the temperature in the dewar tank to be relatively uniform, thereby avoiding local temperatures that are too low or too high in the dewar tank and ensuring the test effect.

[0007] In addition, the high and low temperature cable torsion test device according to the present invention may also have the following additional technical features: In some embodiments of the present invention, the cooling device includes a liquid pipe and a cryogenic working fluid spray coil, the liquid pipe is inserted on the flange cover, the cryogenic working fluid spray coil is installed at the end of the liquid pipe and is located in the cryogenic working fluid spray coil Dewar tank.

[0008] In some embodiments of the present invention, the temperature reduction device further includes a solenoid valve, the liquid pipe is provided with the solenoid valve, and the solenoid valve is installed on the surface of the flange cover plate.

[0009] By adopting the above embodiment, the setting of the cryogenic working medium spray coil realizes rapid and reliable cooling inside the Dewar tank, and the setting of the solenoid valve can control the flow rate of the cryogenic working medium liquid nitrogen.

[0010] In some embodiments of the present invention, the heating device includes a heating rod fixing fixture and a heating rod, the upper end of the heating rod fixing fixture is connected to the flange cover and is located in the Dewar tank, and the heating rod is installed on the heating rod fixing fixture.

[0011] By adopting the above embodiment, the arrangement of the heating rod realizes rapid and reliable heating in the Dewar tank.

[0012] In some embodiments of the present invention, the tooling driving device includes a cable motor and a shaft rod, the cable motor is mounted on the surface of the flange cover, one end of the shaft rod is connected to the output shaft of the cable motor, and the other end of the shaft rod is connected to the upper tooling.

[0013] By adopting the above embodiment, the cable motor drives the shaft to rotate, which can drive the upper tooling to rotate and then drive the cable to twist, thereby achieving a simple and reliable cable twisting test.

[0014] In some embodiments of the present invention, the tool driving device further includes a torque sensor, and the shaft rod is provided with the torque sensor.

[0015] By adopting the above embodiment, the setting of the torque sensor can monitor the torque applied to the cable during the test in real time, thereby ensuring the accuracy and reliability of the cable test. In addition, the structure of setting the torque sensor on the shaft is relatively simple and convenient.

[0016] In some embodiments of the present invention, the fan device includes a fan motor, a first gear, a second gear, a connecting sleeve and an axial flow fan. The connecting sleeve and the axial flow fan can be rotatably sleeved on the shaft rod. The fan motor is installed on the flange cover plate. The first gear is connected to the output shaft of the fan motor. The second gear is sleeved on the connecting sleeve. The second gear is meshed with the first gear. The axial flow fan is connected to one end of the connecting sleeve. The axial flow fan, the first gear and the second gear are all located in the Dewar tank.

[0017] By adopting the above-mentioned embodiment, the coordinated arrangement of the first gear, the second gear, the connecting sleeve and the axial flow fan enables the axial flow fan to disperse heat directly above the cable fixing tooling and to evenly spray and evaporate the low-temperature working fluid, thereby increasing the heating and cooling effects. In addition, since the connecting sleeve and the axial flow fan are both sleeved on the shaft, space utilization is saved.

[0018] In some embodiments of the present invention, the Dewar tank comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved on the inner cylinder, and the flange cover plate covers the inner cylinder and the outer cylinder.

[0019] By adopting the above embodiment, the coordinated arrangement of the inner cylinder, the outer cylinder and the flange cover plate realizes that the Dewar tank is a closed space, thereby ensuring the cable torsion test effect.

[0020] In some embodiments of the present invention, the tooling fixing device includes a lifting plate, a plurality of adjusting screws and a plurality of adjusting nuts, one end of the adjusting screw is connected to the flange cover plate, the plurality of adjusting screws are inserted on the lifting plate, each adjusting screw is threadedly connected to two adjusting nuts, and the two adjusting nuts are respectively located on both sides of the lifting plate.

[0021] By adopting the above embodiment, the coordinated setting of the adjusting screw and the adjusting nut enables the height of the lifting plate to be adjusted according to demand, thereby enabling the height of the lower tooling in the Dewar tank to be adjusted, and thereby enabling the spacing between the lower tooling and the upper tooling to be adjusted to achieve torsion testing of cables of different lengths.

[0022] In some embodiments of the present invention, a thermometer is further included, and the thermometer is arranged in the Dewar tank.

[0023] By adopting the above embodiment, the setting of the thermometer realizes real-time monitoring of the temperature in the dewar tank to ensure the test effect of cable torsion.

[0024] In summary, this application includes the following beneficial technical effects: Through the coordinated setting of the heating device, the cooling device and the tooling drive device, the cable can be subjected to torsion tests in both high-temperature and low-temperature environments. It also meets the cable torsional fatigue test requirements in an alternating temperature environment within the temperature range of -269°C ~ 200°C. The setting of the fan device ensures that the temperature in the dewar tank is relatively uniform, avoiding local temperatures that are too low or too high in the dewar tank, thereby ensuring the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A stereoscopic view of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0026] Figure 2 A first cross-sectional view of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0027] Figure 3 A second cross-sectional view of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0028] Figure 4 A first perspective view of a high and low temperature cable torsion testing device without a Dewar tank according to some embodiments of the present invention is schematically shown.

[0029] Figure 5 A stereoscopic view of a cable fixing tool of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0030] Figure 6 A second view schematically illustrates a perspective view of a high and low temperature cable torsion testing device according to some embodiments of the present invention without a Dewar tank.

[0031] Figure 7 A perspective view schematically shows a fan device of a high and low temperature cable torsion testing device according to some embodiments of the present invention.

[0032] Figure 8 A three-dimensional diagram schematically shows the connection between a fan device and a tool driving device of a high and low temperature cable torsion testing device according to some embodiments of the present invention.

[0033] Fig. 9A perspective view of a tooling driving device of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0034] Fig.10 A stereoscopic view of a temperature reduction device of a high and low temperature cable torsion testing device according to some embodiments of the present invention is schematically shown.

[0035] Reference numerals: 1. Dewar tank, 11. Inner tube, 12. Outer tube, 13. Flange cover, 2. Cooling device, 21. Solenoid valve, 22. Liquid pipe, 23. Low-temperature working fluid spray coil, 24. Pipe seat, 25. Valve bracket, 3. Aviation plug, 4. Fan device, 401. Fan motor, 402. First connecting shaft, 403. First mounting bracket, 404. First coupling, 405. First gear, 406. Second gear, 407. Gear seat, 408. Connecting ring, 409. Fan flange, 410. Connecting sleeve, 411. Axial fan, 5. Tooling drive device, 51. Cable motor, 52. Shaft, 521. First slot, 52 2. Second slot, 53. Second mounting bracket, 54. Torque sensor, 55. Second coupling, 57. Sensor mounting plate, 6. Fixing device, 61. Lifting plate, 62. Adjusting screw, 63. Adjusting nut, 7. Cable fixing tool, 71. Lower tool, 711. First mounting rod, 712. First angle plate, 713. First vertical plate, 714. First clamping block, 715. First wire hole, 716. First hole, 72. Upper tool, 721. Second mounting rod, 722. Second angle plate, 723. Second vertical plate, 724. Second clamping block, 725. Second wire hole, 726. Second hole, 9. Heating rod fixing fixture. DETAILED DESCRIPTION

[0036] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0037] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0038] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0039] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, the element described as "below other elements or features" or "below other elements or features" will then be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be additionally oriented and rotated 90 degrees or in other directions and the spatial relative descriptors used in the text are interpreted accordingly.

[0040] like Figures 1 to 10 As shown, according to an embodiment of the first aspect of the present invention, a high and low temperature cable torsion test device is provided, comprising a dewar tank 1, a cooling device 2, a heating device, a fan device 4, a cable fixing tool 7, a tool fixing device 6, a flange cover plate 13 and a tool driving device 5; the flange cover plate 13 is covered on the dewar tank 1, The cooling device 2, the heating device, the tooling driving device 5 and the fan device 4 are all inserted on the flange cover plate 1; The tool fixing device 6 is installed in the Dewar tank 1, and the cable fixing tool 7 includes an upper tool 72 and a lower tool 71. The upper tool 72 is installed on the tool driving device 5, and the lower tool 71 is installed on the tool fixing device 6. The upper tool 72 and the lower tool 71 are both located in the Dewar tank 1, and the lower tool 71 is located directly below the upper tool 72; The upper end of the cable fixing device is connected to the flange cover 13 and the cable fixing device is located in the Dewar tank 1. The cooling device 2 is used for cooling the Dewar tank 1, the heating device is used for heating the Dewar tank 1, and the fan device 4 is used for uniform cooling or heating in the Dewar tank 1.

[0041] In the above embodiment, it should be noted that the lower tooling 71 includes a first mounting rod 711, a first angle plate 712, a first vertical plate 713 and a first clamping block 714. A first clamping block 714 is arranged on one side of the first mounting rod 711. The first clamping block 714 is clamped with the cable fixing device and then bonded, screwed or welded. A first angle plate 712 and a first vertical plate 713 are arranged at intervals on the other side of the first mounting rod 711. The first angle plate 712 is in the shape of an "L" shape. Two first wire holes 715 are arranged at intervals on the first mounting rod 711. Both the first angle plate 712 and the first vertical plate 713 are provided with first holes 716.

[0042] The upper tooling 72 includes a second mounting rod 721, a second angle plate 722, a second vertical plate 723 and a second clamping block 724. A second clamping block 724 is arranged on one side of the second mounting rod 721. The second clamping block 724 is glued, screwed or welded to the tooling driving device 5 after being clamped. A second angle plate 722 and a second vertical plate 723 are arranged at intervals on the other side of the second mounting rod 721. The second angle plate 722 is in an "L" shape. Two second wire holes 725 are arranged at intervals on the second mounting rod 721. Second holes 726 are arranged on the second angle plate 722 and the second vertical plate 723.

[0043] The first angle plate 712 and the second angle plate 722 are disposed opposite to each other.

[0044] When a cable torsion test is required, the cable is passed through the two first wire passing holes 715, the first hole 716 of the first vertical plate 713, the first hole 716 of the first angle plate 712, the second hole 726 of the second angle plate 722 and the first wire passing hole 715 in sequence and then fixed. Then, the fan device 4 is turned on, and then the heating device is turned on. The tooling drive device 5 is started to drive the upper tooling 71 to rotate and drive the cable to twist to perform a high-temperature environment test on the cable. After the high-temperature test is completed, the heating device is turned off, and the cooling device 2 is started to perform a cable test in a low-temperature environment. After the test is completed, the tooling drive device 5, the fan device 4 and the cooling device 2 are turned off in sequence.

[0045] The technical effect achieved by the above embodiment is: through the coordinated setting of the heating device, the cooling device and the tooling driving device 5, the cable can be subjected to torsion test in both high temperature environment and low temperature environment, and the cable torsion fatigue test requirements in the alternating temperature environment within the temperature range of -269°C to 200°C are met. The setting of the fan device achieves a relatively uniform temperature in the dewar tank 1, avoiding local excessively low or excessively high temperatures in the dewar tank 1, and ensuring the test effect.

[0046] Optional, such as Figures 1 to 4 as well as Figure 6 and Fig.10 As shown, the cooling device 2 includes a liquid pipe 22 and a cryogenic working fluid spray coil 23. The liquid pipe 22 is inserted on the flange cover 13. The cryogenic working fluid spray coil 23 is installed at the end of the liquid pipe 22 and is located in the cryogenic working fluid spray coil 23 Dewar tank 1.

[0047] The cooling device 2 further includes a solenoid valve 21 . The liquid pipe 22 is provided with the solenoid valve 21 . The solenoid valve 21 is installed on the surface of the flange cover plate 13 .

[0048] In the above optional embodiment, it should be noted that the cooling device also includes a pipe seat 24 and a valve bracket 25, both of which are fixed on the surface of the flange cover 13, the solenoid valve 21 is installed on the valve bracket 25, the liquid pipe 22 is inserted on the pipe seat 24, and the cryogenic working fluid spray coil 23 is located directly below the fan device 4; the cooling working fluid is liquid nitrogen. When cooling is required, the liquid nitrogen is injected into the cryogenic working fluid spray coil 23 through the liquid pipe 22 by a liquid pump, and spray cooling is achieved in the Dewar tank 1 through multiple liquid outlets on the cryogenic working fluid spray coil 23.

[0049] The beneficial effects of the above optional embodiments are: the rapid and reliable cooling of the interior of the Dewar tank 1 is achieved by the provision of the cryogenic working medium spray coil 23, and the flow rate of the cryogenic working medium liquid nitrogen can be controlled by the provision of the solenoid valve 21.

[0050] Optional, such as Figures 1 to 4 as well as Figure 6 As shown, the heating device includes a heating rod fixing fixture 9 and a heating rod. The upper end of the heating rod fixing fixture 9 is connected to the flange cover plate 13 and is located in the Dewar tank 1. The heating rod is installed on the heating rod fixing fixture 9.

[0051] In the above optional embodiment, it should be noted that after the heating rod is inserted into the heating rod fixing fixture 9, it is connected by means of screw connection or clamping.

[0052] The beneficial effect of the above optional embodiment is that rapid and reliable heating of the temperature in the Dewar tank 1 is achieved by setting the heating rod.

[0053] Optional, such as Figures 1 to 4 as well as Figure 8 and Fig. 9 As shown, the tooling drive device 5 includes a cable motor 51 and a shaft 52 . The cable motor 51 is mounted on the surface of the flange cover 13 . One end of the shaft 52 is connected to the output shaft of the cable motor 51 , and the other end of the shaft 52 is connected to the upper tooling 72 .

[0054] In the above optional embodiments, it should be noted that a first card slot 521 and a second card slot 522 are provided at one end of the shaft rod 52 away from the cable motor 51, and the first card slot 521 and the second card slot 522 are connected to each other. After the second mounting rod 721 is clamped on the first card slot 521, it is screwed or clamped to the side wall of the first card slot 521. After the second clamping block 724 is clamped on the second card slot 522, it is screwed or clamped to the side wall of the second card slot 522. The cable motor 51 is a servo motor.

[0055] The beneficial effect of the above optional embodiment is that the rotation of the shaft 52 driven by the cable motor 51 can drive the upper tooling 72 to rotate and then drive the cable to twist, thereby realizing a simple and reliable cable twisting test.

[0056] Optional, such as Figures 1 to 4 as well as Figure 8 and Fig. 9 As shown, the tool driving device 5 further includes a torque sensor 54 , and the shaft 52 is provided with the torque sensor 54 .

[0057] In the above optional embodiments, it should be noted that the tooling drive device 5 also includes a second coupling 55, a second mounting bracket 53 and a sensor mounting plate 57. The second mounting bracket 53 is mounted on the surface of the flange cover 13 by screwing. The cable motor 51 is mounted on the end of the second mounting bracket 53 away from the flange cover 13 by screwing. The shaft 52 passes through the second mounting bracket 53 and is connected to the output shaft of the cable motor 51 through the second coupling 55. The shaft 52 is mounted with a torque sensor 54 by screwing, and the side of the torque sensor 54 is connected with a sensor mounting plate 57. The sensor mounting plate 57 is fixed to the second mounting bracket 53 by screwing.

[0058] The beneficial effects of the above optional embodiments are: by setting the torque sensor 54, the torque applied to the cable during the test can be monitored in real time, thereby ensuring the accuracy and reliability of the cable test. In addition, the structure of setting the torque sensor 54 on the shaft 52 is relatively simple and convenient.

[0059] Optional, such as Figures 1 to 4 as well as Figure 7 and Figure 8As shown, the fan device 4 includes a fan motor 401, a first gear 405, a second gear 406, a connecting sleeve 410 and an axial flow fan 411. The connecting sleeve 410 and the axial flow fan 411 can be rotatably sleeved on the shaft 52. The fan motor 401 is installed on the flange cover 13. The first gear 405 is connected to the output shaft of the fan motor 401. The second gear 406 is sleeved on the connecting sleeve 410. The second gear 406 is meshed with the first gear 405. The axial flow fan 411 is connected to one end of the connecting sleeve 410. The axial flow fan 411, the first gear 405 and the second gear 406 are all located in the Dewar tank 1.

[0060] In the above optional embodiment, it should be noted that the low-temperature working medium spray coil 23 is located directly below the axial flow fan 411 .

[0061] The heating rod fixing fixture 9 is located beside the axial flow fan 411 . There are multiple heating rod fixing fixtures 9 , and the multiple heating rod fixing fixtures 9 are arranged in a circular array on the periphery of the axial flow fan 411 .

[0062] The fan device 4 also includes a first connecting shaft 402, a first mounting frame 403, a first coupling 404, a gear seat 407, a connecting ring 408 and a fan flange 409. The first mounting frame 403 is fixed to the surface of the flange cover 13 by screwing. The fan motor 401 is installed on the top of the first mounting frame 403. The output shaft of the fan motor 401 passes through the top wall of the first mounting frame 403 and is connected to the first connecting shaft 402 through the first coupling 404. The other end of the first connecting shaft 402 passes through the flange cover 13 and is connected to the first gear 405. The connecting sleeve 410 is connected to the flange cover 1 The connecting sleeve 410 is rotatably connected through a bearing, a connecting ring 408 is integrally formed on the top of the connecting sleeve 410 to fix the upper and lower positions of the connecting sleeve 410, the second gear 406 is located on the side of the flange cover 13 away from the connecting ring 408, the gear seat 407 is connected to the inner top wall of the Dewar tank 1 through bolts, the second gear 406 is located between the flange cover 13 and the gear seat 407, the connecting sleeve 410 is connected to the axial flow fan 411 through the fan flange 409, the shaft 52 is inserted into the axial flow fan 411, and bearings are arranged between the connecting sleeve 410, the axial flow fan 411 and the shaft 52.

[0063] The beneficial effects of the above optional embodiments are as follows: through the coordinated arrangement of the first gear 405, the second gear 406, the connecting sleeve 410 and the axial flow fan 411, the axial flow fan 411 can disperse heat directly above the cable fixing tool 7 and make the low-temperature working medium spray and evaporate evenly, thereby increasing the heating and cooling effects. In addition, since the connecting sleeve 410 and the axial flow fan 411 are both mounted on the shaft 52, the utilization of space is saved.

[0064] Optional, such as Figures 1 to 4 As shown, the Dewar tank 1 includes an inner cylinder 11 and an outer cylinder 12 , the outer cylinder 12 is sleeved on the inner cylinder 11 , and the flange cover 13 covers the inner cylinder 11 and the outer cylinder 12 .

[0065] In the above optional embodiments, it should be noted that a vacuum is provided between the inner cylinder 11 and the outer cylinder 12 so that the Dewar tank 1 can achieve the effect of cold insulation and heat insulation; the first mounting frame 403, the second mounting frame 53, the heating rod fixing fixture 9 and the valve bracket 25 are all connected to the flange cover plate 13 by bolt connection; the shaft rod 52 passes through the flange cover plate 13 and extends into the interior of the Dewar tank 1.

[0066] The beneficial effect of the above optional embodiment is that the inner cylinder 11, the outer cylinder 12 and the flange cover plate 13 are matched to realize that the dewar tank 1 is a closed space, thereby ensuring the cable torsion test effect.

[0067] Optional, such as Figure 2 and Figure 3 As shown, the tooling fixing device 6 includes a lifting plate 61, a plurality of adjusting screws 62 and a plurality of adjusting nuts 63. One end of the adjusting screw 62 is connected to the flange cover 13. The plurality of adjusting screws 62 are inserted into the lifting plate 61. Each adjusting screw 62 is threadedly connected to two adjusting nuts 63, and the two adjusting nuts 63 are respectively located on both sides of the lifting plate 61.

[0068] In the above optional embodiment, it should be noted that a square hole is opened on the lifting plate 62, and the first clamping block 714 is clamped in the square hole.

[0069] The beneficial effects of the above optional embodiments are: by adjusting the screw 62 and the adjusting nut 63, the height of the lifting plate 61 can be adjusted according to the needs, thereby adjusting the height of the lower tooling 71 in the Dewar tank 1, and then adjusting the distance between the lower tooling 71 and the upper tooling 71 to achieve torsion testing of cables of different lengths.

[0070] Optionally, a thermometer is also included, and the Dewar tank 1 is provided with a thermometer.

[0071] In the above optional embodiment, it should be noted that it also includes an aviation plug 3 and a controller, the thermometer is electrically connected to the aviation plug 3, the aviation plug 3, the fan motor 401, the cable motor 51, the heating rod, the solenoid valve 21 and the liquid pump are all electrically connected to the controller, and the thermometer is not shown in the figure.

[0072] The beneficial effect of the above optional embodiment is that the temperature in the Dewar tank 1 is monitored in real time by setting the thermometer to ensure the test effect of the cable torsion.

[0073] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A high and low temperature cable torsion test device, characterized in that: The invention comprises a dewar tank (1), a cooling device (2), a heating device, a fan device (4), a cable fixing tool (7), a tool fixing device (6), a flange cover plate (13) and a tool driving device (5); the flange cover plate (13) is covered on the dewar tank (1). The cooling device (2), the heating device, the tooling drive device (5) and the fan device (4) are all inserted on the flange cover plate (1); The tool fixing device (6) is installed in the Dewar tank (1), and the cable fixing tool (7) comprises an upper tool (72) and a lower tool (71), the upper tool (72) is installed on the tool driving device (5), and the lower tool (71) is installed on the tool fixing device (6), the upper tool (72) and the lower tool (71) are both located in the Dewar tank (1), and the lower tool (71) is located directly below the upper tool (72); The upper end of the cable fixing device is connected to the flange cover plate (13) and the cable fixing device is located in the dewar tank (1). The cooling device (2) is used to cool the dewar tank (1). The heating device is used to heat the dewar tank (1). The fan device (4) is used to evenly cool or evenly heat the dewar tank (1).

2. The high and low temperature cable torsion test device according to claim 1, characterized in that: The cooling device (2) comprises a liquid pipe (22) and a cryogenic working fluid spray coil (23), wherein the liquid pipe (22) is inserted into the flange cover plate (13), and the cryogenic working fluid spray coil (23) is installed at an end of the liquid pipe (22) and is located in a dewar tank (1) of the cryogenic working fluid spray coil (23).

3. The high and low temperature cable torsion test device according to claim 2, characterized in that: The temperature reduction device (2) further comprises a solenoid valve (21), the solenoid valve (21) being arranged on the liquid pipe (22), and the solenoid valve (21) being mounted on the surface of the flange cover plate (13).

4. The high and low temperature cable torsion test device according to claim 1, characterized in that: The heating device comprises a heating rod fixing fixture (9) and a heating rod, the upper end of the heating rod fixing fixture (9) being connected to the flange cover plate (13) and being located in the dewar tank (1), and the heating rod being mounted on the heating rod fixing fixture (9).

5. The high and low temperature cable torsion test device according to any one of claims 1 to 4, characterized in that: The tooling drive device (5) comprises a cable motor (51) and a shaft (52); the cable motor (51) is mounted on the surface of the flange cover (13); one end of the shaft (52) is connected to an output shaft of the cable motor (51); and the other end of the shaft (52) is connected to the upper tooling (72).

6. The high and low temperature cable torsion test device according to claim 5, characterized in that: The tool drive device (5) further comprises a torque sensor (54), and the torque sensor (54) is arranged on the shaft (52).

7. The high and low temperature cable torsion test device according to claim 5, characterized in that: The fan device (4) comprises a fan motor (401), a first gear (405), a second gear (406), a connecting sleeve (410) and an axial flow fan (411); the connecting sleeve (410) and the axial flow fan (411) are both rotatably sleeved on the shaft (52); the fan motor (401) is mounted on the flange cover (13); the first gear (405) is connected to the output shaft of the fan motor (401); the second gear (406) is sleeved on the connecting sleeve (410); the second gear (406) is meshed with the first gear (405); the axial flow fan (411) is connected to one end of the connecting sleeve (410); and the axial flow fan (411), the first gear (405) and the second gear (406) are all located in the dewar tank (1).

8. The high and low temperature cable torsion test device according to any one of claims 1 to 4, characterized in that: The Dewar tank (1) comprises an inner cylinder (11) and an outer cylinder (12), wherein the outer cylinder (12) is sleeved on the inner cylinder (11), and the flange cover plate (13) covers the inner cylinder (11) and the outer cylinder (12).

9. The high and low temperature cable torsion test device according to claim 8, characterized in that: The tooling fixing device (6) comprises a lifting plate (61), a plurality of adjusting screws (62) and a plurality of adjusting nuts (63), one end of each adjusting screw (62) being connected to the flange cover (13), the plurality of adjusting screws (62) being inserted into the lifting plate (61), each adjusting screw (62) being threadedly connected to two adjusting nuts (63), and the two adjusting nuts (63) being respectively located on two sides of the lifting plate (61).

10. The high and low temperature cable torsion test device according to any one of claims 1 to 4, characterized in that: It also includes a thermometer, which is arranged in the Dewar tank (1).

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