High and low temperature alternating wire and cable test system

Abstract

The utility model relates to the technical field of wire and cable tests, and particularly provides a high and low temperature alternating wire and cable test system, which comprises a control device used for setting and collecting cable winding motion times and test temperature parameters required by a test; the sealing device is used for providing a specific temperature environment; the electric wire and cable winding device is arranged in the sealing device and is used for winding electric wires and cables; the temperature control device is used for controlling the temperature in the closed device; and the wire and cable winding device and the temperature control device are connected with the control device. The high and low temperature alternating wire and cable test system provided by the utility model can effectively realize a winding motion test of a cable within a temperature range of-269 DEG C to 200 DEG C, can set a target temperature to be any temperature point within the range of-269 DEG C to 200 DEG C according to different test temperature requirements in the test process, and carries out a continuous winding motion test of the cable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wire and cable test, especially to a high and low temperature alternating wire and cable test system. BACKGROUND

[0002] According to the use condition of the extravehicular spaceflight wire and cable in the deep low temperature environment, it is required to detect the bending and winding motion performance of the wire and cable under multiple temperature conditions such as -196 DEG C, -240 DEG C and -269 DEG C according to the test input condition.

[0003] The bending and winding performance test of the cable refers to that after the cable is wound on the winding rod of the corresponding specification diameter for a number of turns, the cable rotates around the core in a certain direction for a number of turns and then stops, and then rotates around the core in the opposite direction for a number of turns and then stops, and then the above positive rotation and reverse rotation process is repeated until the set number of rotations is completed.

[0004] Therefore, how to provide a high and low temperature alternating wire and cable test system is a technical problem that needs to be solved by the person skilled in the art. INVENTION CONTENTS

[0005] The utility model provides a high and low temperature alternating wire and cable test system to solve the problem that the winding motion process of the wire and cable under the alternating temperature environment cannot be tested and inspected in the prior art, and realizes the winding test of the wire and cable under the high and low temperature environment.

[0006] The utility model provides a high and low temperature alternating wire and cable test system, which comprises:

[0007] A control device is used to set and collect the wire and cable motion number and test target temperature parameter of the test requirement.

[0008] A sealing device is used to provide a specific temperature environment.

[0009] A wire and cable winding device is arranged in the sealing device and is used to wind the wire and cable.

[0010] A temperature control device is used to control the temperature in the sealing device.

[0011] The control device is connected with the wire and cable winding device and the temperature control device.

[0012] According to the high and low temperature alternating wire and cable test system, the wire and cable winding device comprises:

[0013] A driving mechanism is used to provide power.

[0014] The transmission mechanism is connected to the drive mechanism;

[0015] A winding rod is mounted on the transmission mechanism, and the winding rod rotates under the action of the driving mechanism;

[0016] A pulley is provided on the sealed device; the pulley is for the wire and cable to pass over, and the middle position of the wire and cable is wound around the winding rod at least once, and the end of the cable is connected to a weight.

[0017] According to the high and low temperature alternating current wire and cable testing system provided by this utility model, the sealing device includes:

[0018] Dewar, with an opening at the top;

[0019] An upper flange is provided at the opening of the Dewar; the driving mechanism is provided on the top of the upper flange;

[0020] A flange tie rod, the top end of which is connected to the bottom of the upper flange, and the bottom end of which extends to the inside of the Dewar;

[0021] A fixing bracket is attached to the bottom of the flange tie rod.

[0022] According to the high and low temperature alternating current wire and cable testing system provided by this utility model, the transmission mechanism includes:

[0023] A drive shaft is connected to the drive mechanism;

[0024] A large gear is connected to the drive shaft;

[0025] The small gear meshes with the large gear for transmission;

[0026] A rotating shaft is rotatably mounted on the fixed frame; and the winding rod is mounted on the rotating shaft.

[0027] According to the high and low temperature alternating wire and cable testing system provided by this utility model, the fixing frame includes:

[0028] Fixed base;

[0029] Both the outer and inner fixing rings are mounted on the fixed base; one end of the rotating shaft is connected to the inner fixing ring, and the other end is connected to the outer fixing ring.

[0030] According to the high and low temperature alternating current wire and cable testing system provided by this utility model, the control device includes:

[0031] Industrial control computers are used to determine the status of actions and send action commands to the actuators.

[0032] The data acquisition module is used to collect data such as the number of cable movements and the target temperature parameters required for the test.

[0033] A communication module connects the industrial control computer and the data acquisition module.

[0034] According to the present invention, a high and low temperature alternating wire and cable testing system is provided. The temperature control device includes a temperature controller, a heating rod, a low temperature medium flow valve, and a thermometer. The temperature controller determines the difference between the current temperature and the target temperature based on the temperature signal fed back by the thermometer, and controls the heating power of the heating rod to reach the target temperature; or controls the low temperature medium flow valve to control the output of the low temperature medium to reach the target temperature.

[0035] The high and low temperature alternating wire and cable testing system provided by this utility model also includes a cryogenic liquid container, which is connected to the cryogenic medium flow valve.

[0036] According to the present invention, a high and low temperature alternating wire and cable testing system is provided, wherein the cryogenic liquid container contains liquid nitrogen or liquid helium.

[0037] According to the high and low temperature alternating wire and cable testing system provided by this utility model, the driving mechanism is preferably a servo motor.

[0038] This utility model provides a high and low temperature alternating current cable testing system. A control device sets and collects the required number of cable movements and the target temperature parameters. A sealed device provides a specific temperature environment. A cable winding device is located inside the sealed device for winding the cable. A temperature control device controls the temperature inside the sealed device. Both the control device and the cable winding device are connected, effectively enabling cable winding tests within a temperature range of -269℃ to 200℃. During the test, the target temperature can be set to any point within the range of -269℃ to 200℃ according to different test temperature requirements, and continuous cable winding tests can be conducted. This device also allows for obtaining cable bending and winding performance under different temperature environments, providing important data support for cable applications in various environments. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1This is a structural block diagram of the high and low temperature alternating wire and cable testing system provided by this utility model.

[0041] Figure 2 This is an installation side view of the wire and cable winding device, sealing device, and temperature control device provided by this utility model.

[0042] Figure 3 This is a top view of the wire and cable winding device and sealing device provided by this utility model.

[0043] Figure label:

[0044] 1. Control device; 2. Sealing device; 3. Wire and cable winding device; 4. Temperature control device; 5. Wire and cable; 31. Drive mechanism; 32. Transmission mechanism; 33. Winding rod; 34. Pulley; 35. Weight; 21. Dewar; 22. Upper flange; 23. Flange tie rod; 24. Fixing frame; 321. Drive shaft; 322. Large gear; 323. Small gear; 324. Rotating shaft; 241. Fixed base; 242. Outer fixing ring; 243. Inner fixing ring; 41. Heating rod; 42. Low temperature medium flow valve. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] The following is combined Figures 1-3 The present invention provides a high and low temperature alternating wire and cable testing system, comprising a control device 1, a sealing device 2, a wire and cable winding device 3, and a temperature control device 4.

[0048] likeFigure 1 As shown, the control device 1 is used to set and collect the required number of cable movements and the target temperature parameters for the test. On the one hand, the control device 1 can set the number of cable movements according to the test requirements, playing a crucial role in determining the frequency of the cable winding operation during the test; on the other hand, the control device 1 can also set the target temperature parameters, providing a basis for temperature environment control throughout the test; simultaneously, it is connected to both the cable winding device 3 and the temperature control device 4, sequentially controlling the operating status of the two devices and exchanging relevant data.

[0049] like Figure 2 As shown, the sealing device 2 is used to provide a specific temperature environment so that the wires and cables are under the required temperature conditions during the winding test, ensuring that the test can be carried out smoothly in specific environments such as high and low temperature alternation.

[0050] The wire and cable winding device 3 is located inside the sealed device 2 and is used to wind the wire and cable to meet the winding requirements required for the test.

[0051] Temperature control device 4 is used to control the temperature inside the sealed device 2. Temperature control device 4 adjusts the temperature of the sealed device 2 according to the set test target temperature parameters, so as to meet the test requirements under different temperature conditions such as high and low temperature alternation.

[0052] The control device 1 is connected to both the cable winding device 3 and the temperature control device 4. This invention can effectively perform cable winding tests within a temperature range of -269℃ to 200℃. During the test, the target temperature can be set to any point within the range of -269℃ to 200℃ according to different test temperature requirements, and continuous cable winding tests can be carried out. This device can also obtain the cable bending and winding performance under different temperature environments, providing important data support for the application of cables in different environments.

[0053] In one feasible embodiment of this utility model, the wire and cable winding device 3 includes a drive mechanism 31, a transmission mechanism 32, a winding rod 33, and a pulley 34. The drive mechanism 31 provides power and is the power source for the wire and cable winding device 3, providing the necessary power for subsequent dedicated operation and ensuring that the entire wire and cable winding device 3 can be carried out smoothly. The transmission mechanism 32 is connected to the drive mechanism 31. The function of the transmission mechanism 32 is to effectively transmit the power generated by the drive mechanism 31 to the corresponding components, thereby ensuring smooth power flow within the entire device and cooperating with other components to complete the winding work of the wire and cable. The winding rod 33 is disposed on the transmission mechanism 32, and rotates under the action of the drive mechanism 31. The winding rod 33 is disposed on the transmission mechanism 32, and can rotate under the action of the drive mechanism 31 transmitting power through the transmission mechanism 32. The pulley 34 is mounted on the sealed device 2; and the power supply cable of the pulley 34 is bypassed, and the middle position of the cable is wound around the winding rod 33 at least once. The purpose of this arrangement is that the cable rotates around the shaft of the winding rod 33 a certain number of times in a certain direction and then stops, and then rotates around the shaft of the winding rod a certain number of times in the opposite direction and then stops. The above forward and reverse rotation process is repeated until the set number of rotations is completed.

[0054] Weights 35 are connected to the end of the wire and cable 5. Weights 35 can apply a certain tensile force to the wire and cable 5, simulating the external forces that the wire and cable may be subjected to in actual use scenarios, making the test more in line with actual working conditions, further improving the conditions of the entire wire and cable test, and ensuring that the test results are more valuable for reference.

[0055] More specifically, multiple winding rods 33 can be set on each rotating shaft 324, which means that multiple wires and cables can be wound at the same time.

[0056] In the embodiments of this utility model, the drive mechanism 31, transmission mechanism 32, winding rod 33, pulley 34 and weight 35 cooperate with each other to form a complete wire and cable winding device 2, which can effectively complete the winding test operation of wires and cables in the high and low temperature alternating wire and cable test system.

[0057] In one feasible embodiment of this utility model, the sealing device 2 includes a Dewar 21, an upper flange 22, and a flange rod 23. The top of the Dewar 21 is open, allowing the upper flange 22 to be connected. The Dewar 21 provides a temperature environment for the wire and cable winding test. During the test, the Dewar 21 effectively isolates the heat exchange between the inside of the Dewar and the external environment, ensuring that the high or low temperature environment of the wire and cable can be efficiently achieved during the cable test. The upper flange 22 is located at the opening of the Dewar 21, serving as a seal and connection. A drive mechanism 31 is provided at the top of the upper flange 22, which is used to control or adjust the actions related to the sealing device 2. The top of the flange rod 23 is connected to the bottom of the upper flange 22, and the bottom of the flange rod 23 extends to the inside of the Dewar 21. The flange rod 23 provides an installation platform for the temperature control device 4. A fixing bracket 24 is connected to the bottom of the flange rod 23, used to support or fix the transmission mechanism 32 inside the Dewar 21.

[0058] In one feasible embodiment of this utility model, the transmission mechanism 32 includes a transmission shaft 321, a large gear 322, a small gear 323, and a rotating shaft 324. The transmission shaft 321 is connected to the drive mechanism 31; the large gear 322 is connected to the transmission shaft 321; the small gear 323 meshes with the large gear 322 for transmission; the rotating shaft 324 is rotatably mounted on the fixed frame 24; and a winding rod 33 is mounted on the rotating shaft 324. The drive mechanism 31 drives the large gear 322 to rotate. Since the small gear 323 meshes with the large gear 322, the large gear 322 drives the small gear 323 to rotate, and the small gear 323 drives the rotating shaft 324 to rotate. As the rotating shaft 324 rotates, and as the winding rod 33 rotates, the wire and cable are wound.

[0059] In one feasible embodiment of this utility model, the fixing frame 24 includes a fixing base 241, an outer fixing ring 242, and an inner fixing ring 243, both of which are disposed on the fixing base 241. One end of the rotating shaft 324 is connected to the inner fixing ring 243, and the other end is connected to the outer fixing ring 242. By disposing both the outer fixing ring 242 and the inner fixing ring 243 on the fixing base 241, and connecting both ends of the rotating shaft 324 to the outer fixing ring 242 and the inner fixing ring 243 respectively, a stable support structure is formed. This ensures that the rotating shaft 324 remains stable during rotation, reduces vibration and noise caused by instability, and improves the reliability and durability of the entire device.

[0060] The fixed base 241 provides a fixed mounting platform for the outer fixed ring 241 and the inner fixed ring 243, making these components easier to install and remove. This not only simplifies the installation process but also allows for faster operation when maintenance or component replacement is required, reducing maintenance costs and time. The stable mounting structure reduces potential safety risks caused by instability of the rotating shaft.

[0061] Specifically, when the wire and cable 5 rotates with the winding rod 33, the diameter of the winding rod 33 and the method of hanging weight are as follows. The corresponding relationship between the winding rod diameter and hanging weight for wires and cables of different gauges is shown in Table 1 and Table 2.

[0062] The relationship between the winding diameter and hanging weight of insulated wires and cables of different gauges is shown in Table 1:

[0063] Table 1. Diameter of insulated wire winding rod and hanging weight:

[0064] AWG Rod diameter mm Hang weight kg 28 6.0 0.25 26 6.0 0.25 24 6.0 0.25 22 6.0 0.25 20 6.0 0.25

[0065] The relationship between the shielding and sheathing diameters of wires and cables of different gauges and the corresponding hanging weights is shown in Table 2 below.

[0066] Table 2. Shielded and Sheathed Cable Winding Diameter and Hanging Weight

[0067] AWG Number of cores Rod diameter mm Hang weight kg 28 1 8.0 0.25 26 1 10 0.25 24 1 12 0.25 22 1 15 0.50 20 1 15 0.50 28 2 10 0.50 26 2 15 0.50 24 2 15 0.50 22 2 20 0.80 20 2 20 0.80

[0068] Therefore, the high and low temperature alternating wire and cable testing system provided by this utility model can effectively realize the winding motion test of cables within the temperature range of -269℃ to 200℃. During the test, the target temperature can be set to any temperature point within the range of -269℃ to 200℃ according to different test temperature requirements, and continuous winding motion tests of the cable can be carried out. Through this device, the bending and winding performance of cables under different temperature environments can be obtained, providing important data support for the application of cables in different environments.

[0069] In one feasible embodiment of this utility model, the control device 1 includes an industrial control computer, a data acquisition module, and a communication module. The industrial control computer is used to determine the action status and send action commands to the actuator, and communicates with each communication module to obtain and store test-related data. The control software is used to set the required number of cable movements and the target temperature parameters for the test, and simultaneously collects and records the actual number of cable movements and actual temperature data generated during the test. The communication module is the hardware device that enables communication between the industrial control computer, the temperature control device, and the cable winding device.

[0070] In the above embodiments, through automated test control and data acquisition processes, the control device 1 can significantly improve the efficiency and accuracy of the test.

[0071] In one feasible embodiment of this utility model, the temperature control device 4 includes a temperature controller, a heating rod 41, a cryogenic medium flow valve 42, and a thermometer. The temperature controller determines the difference between the current temperature and the target temperature based on the temperature signal fed back from the thermometer, and controls the heating power of the heating rod 41 to reach the target temperature. When the target temperature is lower than room temperature, the temperature controller determines the difference between the current temperature and the target temperature based on the temperature signal fed back from the thermometer, and adjusts the cryogenic medium flow valve 42 to control the output of the cryogenic medium to reach the target temperature. During the temperature control process, the system temperature can be controlled through one thermometer. Simultaneously, two to three thermometers can be set as needed during the experiment to collect the temperature at various key locations in the experimental system.

[0072] In this invention, considering the characteristics of the temperature environment, room temperature is used as the distinguishing point. Tests with a temperature higher than room temperature are called high-temperature tests, and tests with a temperature lower than room temperature are called low-temperature tests. In high-temperature tests, a temperature control system is used to control the heating system to achieve a high-temperature environment and control the temperature; in low-temperature tests, a temperature control system is used to control the flow rate of a low-temperature refrigerant (liquid nitrogen, liquid helium) to achieve a low-temperature environment and control the temperature. The temperature control error during the test is 0 to ±2℃.

[0073] During the experiment, in order to ensure a uniform temperature environment, at least three heating rods need to be installed during the high-temperature test, and low-temperature refrigerant needs to be injected from three infusion ports during the low-temperature test.

[0074] In one feasible embodiment of this invention, a cryogenic liquid container is further included, which is connected to a cryogenic medium flow valve 42. The cryogenic liquid container contains liquid nitrogen or liquid helium to meet the cryogenic environment requirements of the cable.

[0075] In one feasible embodiment of this utility model, the drive mechanism 31 is a servo motor, which can accurately control the number of rotations and angle of the winding rod 33.

[0076] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high and low temperature alternating current wire and cable testing system, characterized in that, include: Control device (1) is used to set and collect the cable movement number and test target temperature parameters required for the test; A sealed device (2) is used to provide a specific temperature environment; A wire and cable winding device (3) is installed inside the sealed device (2) and is used to wind wires and cables (5). Temperature control device (4) is used to control the temperature inside the sealed device (2); The wire and cable winding device (3) and the temperature control device (4) are both connected to the control device (1).

2. The high and low temperature alternating wire and cable testing system according to claim 1, characterized in that, The wire and cable winding device (3) includes: Drive mechanism (31) for providing power; The transmission mechanism (32) is connected to the drive mechanism (31); The winding rod (33) is mounted on the transmission mechanism (32), and rotates under the action of the driving mechanism (31); A pulley (34) is provided on the sealing device (2); and the pulley (34) is for the wire and cable (5) to pass around, and the middle position of the wire and cable (5) is wound around the winding rod (33) at least once, and the end of the wire and cable (5) is connected to a weight (35).

3. The high and low temperature alternating wire and cable testing system according to claim 2, characterized in that, The sealing device (2) includes: Dewar (21), with an opening at the top; The upper flange (22) is located at the opening of the Dewar (21); the drive mechanism (31) is located on the top of the upper flange (22). A flange tie rod (23) is connected at its top to the bottom of the upper flange (22), and the bottom end of the flange tie rod (23) extends to the inside of the dewar (21); The fixing bracket (24) is connected to the bottom of the flange tie rod (23).

4. The high and low temperature alternating wire and cable testing system according to claim 3, characterized in that, The transmission mechanism (32) includes: A drive shaft (321) is connected to the drive mechanism (31); A large gear (322) is connected to the drive shaft (321); The small gear (323) meshes with the large gear (322) for transmission; A rotating shaft (324) is rotatably mounted on the fixed frame (24); and the rotating shaft (324) is provided with the winding rod (33).

5. The high and low temperature alternating wire and cable testing system according to claim 4, characterized in that, The fixing frame (24) includes: Fixed base (241); The outer fixing ring (242) and the inner fixing ring (243) are both disposed on the fixed base (241); one end of the rotating shaft (324) is connected to the inner fixing ring (243), and the other end is connected to the outer fixing ring (242).

6. The high and low temperature alternating current wire and cable testing system according to any one of claims 1-5, characterized in that, The control device includes: Industrial control computers are used to determine the status of actions and send action commands to the actuators. The data acquisition module is used to collect data such as the number of cable movements and the target temperature parameters required for the test. A communication module connects the industrial control computer and the data acquisition module.

7. The high and low temperature alternating wire and cable testing system according to claim 6, characterized in that, The temperature control device (4) includes a temperature controller, a heating rod (41), a low-temperature medium flow valve (42), and a thermometer. The temperature controller determines the difference between the current temperature and the target temperature based on the temperature signal fed back by the thermometer, controls the heating power of the heating rod (41) to reach the target temperature, or controls the low-temperature medium flow valve (42) to control the output of the low-temperature medium to reach the target temperature.

8. The high and low temperature alternating wire and cable testing system according to claim 7, characterized in that, It also includes a cryogenic liquid container, which is connected to the cryogenic medium flow valve (42).

9. The high and low temperature alternating wire and cable testing system according to claim 8, characterized in that, The cryogenic liquid container contains liquid nitrogen or liquid helium.

10. The high and low temperature alternating wire and cable testing system according to claim 2, characterized in that, The drive mechanism (31) is a servo motor.

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