High and low temperature alternating wire and cable test system

Abstract

The invention 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 wire and 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; the wire and cable winding device and the temperature control device are both connected with the control device. The high and low temperature alternating wire and cable test system provided by the invention can effectively realize a winding motion test of a cable in a temperature range of-269 DEG C to 200 DEG C, can set the target temperature to be any temperature point in 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 invention relates to the technical field of wire and cable testing, and in particular to a high and low temperature alternating wire and cable testing system. Background Art

[0002] According to the use conditions of extravehicular aerospace wires and cables in deep low temperature environments, it is required to test the bending and winding performance of wires and cables under multiple temperature conditions such as -196℃, -240℃, and -269℃ according to the test input conditions. Cable bending and winding performance is an important test for cables before application. It is an important indicator to measure whether the cable can perform reciprocating winding motion around a specific diameter winding rod without insulation failure and conductivity reduction.

[0003] The cable bending and winding performance test means that after the cable is wound on a winding rod of corresponding diameter for several turns, the cable rotates around the shaft core in a certain direction for a certain number of turns along with the winding rod and stops, then rotates around the shaft core for a certain number of turns in the opposite direction and stops, and then repeats the above forward and reverse rotation process until the set number of rotations is completed.

[0004] Therefore, how to provide a high and low temperature alternating wire and cable winding test system is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The present invention provides a high and low temperature alternating wire and cable winding test system, which is used to solve the problem in the prior art that it is impossible to carry out relevant inspection and testing on the defects of the wire and cable winding movement process in an alternating temperature environment, and realize the wire and cable winding test in a high and low temperature environment.

[0006] The present invention provides a high and low temperature alternating wire and cable winding test system, comprising: A control device, used to set and collect the number of wire and cable winding movements and test temperature parameters required by the test; Sealed device, used to provide a specific temperature environment; A wire and cable winding device, arranged inside the sealing device, for winding the wire and cable; A temperature control device, used to control the temperature inside the closed device; The wire and cable winding device and the temperature control device are both connected to the control device.

[0007] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the wire and cable winding device comprises: A driving mechanism for providing power; A transmission mechanism connected to the driving mechanism; A winding rod is arranged on the transmission mechanism and rotates under the action of the driving mechanism; A pulley is arranged on the sealing device; the pulley is used for the wires and cables to pass around, and the middle position of the wires and cables is wound around the winding rod at least once, and the ends of the cables are connected to weights.

[0008] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the sealing device comprises: Dewar, open at the top; An upper flange is arranged at the opening of the Dewar; the driving mechanism is arranged on the top of the upper flange; 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 inner side of the dewar; A fixing frame is connected to the bottom of the flange pull rod.

[0009] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the transmission mechanism comprises: A transmission shaft connected to the driving mechanism; A large gear connected to the transmission shaft; A small gear meshing with the large gear for transmission; The rotating shaft is rotatably arranged on the fixing frame; and the winding rod is arranged on the rotating shaft.

[0010] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the fixing frame comprises: Fixed base; The outer fixing ring and the inner fixing ring are both arranged on the fixing 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.

[0011] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the control device comprises: Industrial computer, used to judge the action status and send action instructions to the actuator; Data acquisition module, used to collect the number of cable movements and test target temperature parameters required by the test; A communication module is used to connect the industrial computer and the data acquisition module.

[0012] According to a high-low temperature alternating wire and cable winding test system provided by the present invention, 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, 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.

[0013] A high-low temperature alternating wire and cable winding test system provided by the present invention also includes a low-temperature liquid container, and the low-temperature liquid container is connected to the low-temperature medium flow valve.

[0014] According to a high-low temperature alternating wire and cable winding test system provided by the present invention, liquid nitrogen or liquid helium is contained in the cryogenic liquid container.

[0015] According to a high and low temperature alternating wire and cable winding test system provided by the present invention, the driving mechanism is preferably a servo motor.

[0016] The high and low temperature alternating wire and cable winding test system provided by the present invention sets and collects the number of cable movements and test target temperature parameters required by the test through a control device, and the closed device is used to provide a specific temperature environment; the wire and cable winding device is arranged inside the closed device, and is used to wind the wire and cable; the temperature control device controls the temperature inside the closed device, and the control device is connected to the wire and cable winding device and the temperature control device, which can effectively realize the winding movement test of the cable within the temperature range of -269℃~200℃. During the test, the target temperature can be set to any temperature point within the range of -269℃~200℃ according to different test temperature requirements, and a continuous winding movement test of the cable can be carried out. Through this device, the bending and winding performance of the cable under different temperature environments can also be obtained, providing important data support for the application of cables in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural block diagram of the high and low temperature alternating wire and cable winding test system provided by the present invention.

[0019] Figure 2 It is an installation side view of the wire and cable winding device, the sealing device and the temperature control device provided by the present invention.

[0020] Figure 3 It is a top view of the wire and cable winding device and the sealing device provided by the present invention.

[0021] Reference numerals: 1. Control device; 2. Sealing device; 3. Wire and cable winding device; 4. Temperature control device; 5. Wires and cables; 31. Driving mechanism; 32. Transmission mechanism; 33. Winding rod; 34. Pulley; 35. Weight; 21. Dewar; 22. Upper flange; 23. Flange pull rod; 24. Fixed frame; 321. Transmission 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 DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] Combine the following Figure 1-Figure 3 The invention provides a high and low temperature alternating wire and cable winding test system, which comprises a control device 1, a sealing device 2, a wire and cable winding device 3 and a temperature control device 4.

[0025] like Figure 1 As shown, the control device 1 is used to set and collect the number of wire and cable winding movements and test temperature parameters required by the test. On the one hand, the control device 1 can set the number of cable movements according to the test requirements, which plays a key role in determining the frequency of wire and cable winding operations in the test; on the other hand, the control device 1 can also set the test target temperature parameters to provide a basis for the temperature environment control of the entire test; at the same time, it maintains connection with the wire and cable winding device 3 and the temperature control device 4, and realizes the control of the working status of the two devices and the interaction of related data in turn.

[0026] like Figure 2As shown, the sealing device 2 is used to provide a specific temperature environment so that the wires and cables are under temperature conditions that meet the requirements during the winding test, ensuring that the test is carried out smoothly in a specific environment such as corresponding high and low temperature alternation.

[0027] The wire and cable winding device 3 is arranged inside the sealing device 2 and is used for winding the wires and cables to meet the winding requirements required for the test.

[0028] The temperature control device 4 is used to control the temperature inside the closed device 2. The temperature control device 4 adjusts the temperature of the closed 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.

[0029] The control device 1 is connected to the wire and cable winding device 3 and the temperature control device 4. The present invention can effectively realize the winding motion test of the cable in the temperature range of -269℃~200℃. During the test, the target temperature can be set to any temperature point in the range of -269℃~200℃ according to different test temperature requirements, and the continuous winding motion test of the cable can be carried out. Through this device, the bending and winding performance of the cable under different temperature environments can also be obtained, providing important data support for the application of cables in different environments.

[0030] In a feasible embodiment of the present invention, the wire and cable winding device 3 includes a driving mechanism 31, a transmission mechanism 32, a winding rod 33 and a pulley 34. The driving mechanism 31 is used to provide power. The driving mechanism 31 is the power source of the wire and cable winding device 3, and provides the required power for the operation of the subsequent device to ensure that the entire wire and cable winding device 3 can be carried out smoothly. The transmission mechanism 32 is connected to the driving mechanism 31. The function of the transmission mechanism 32 is to effectively transmit the power generated by the driving mechanism 31 and transmit the power to the corresponding components, so as to ensure the smooth flow of power inside the entire device, thereby coordinating with other components to complete the winding work of the wire and cable. The winding rod 33 is arranged on the transmission mechanism 32, and under the action of the driving mechanism 31, the winding rod 33 rotates. The winding rod 33 is arranged on the transmission mechanism 32, and under the action of the driving mechanism 31 transmitting power through the transmission mechanism 32, the winding rod 33 can rotate. The pulley 34 is arranged on the sealing device 2; and the pulley 34 allows the power cable to be wound around, and the middle position of the wire and cable is wound around the winding rod 33 at least once. The purpose of this arrangement is that the wire and cable rotates around the axis core in a certain direction for a certain number of times along with the winding rod 33 and then stops, and then rotates around the axis core in the opposite direction for a certain number of times and then stops, and then repeats the above-mentioned forward and reverse rotation processes until the set number of rotations is completed.

[0031] The end of the wire and cable 5 is connected with a weight 35. The weight 35 can apply a certain pulling force to the wire and cable 5, simulating the external force that the wire and cable may be subjected to in the actual use scenario, making the test more in line with the 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.

[0032] More specifically, a plurality of winding rods 33 may be provided on each rotating shaft 324, that is, a plurality of wires and cables may be wound at the same time.

[0033] In an embodiment of the present invention, the driving mechanism 31, the transmission mechanism 32, the winding rod 33, the pulley 34 and the weight 35 cooperate with each other to form a complete wire and cable winding device 2, so that it can effectively complete the winding test operation of the wire and cable in the high and low temperature alternating wire and cable winding test system.

[0034] In a feasible embodiment of the present invention, the sealing device 2 includes a dewar 21, an upper flange 22, and a flange pull 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 winding test of wires and cables. During the test, the dewar 21 will effectively isolate the heat exchange between the inside of the dewar and the external environment, ensuring that the high temperature or low temperature environment of the wires and cables can be efficiently achieved during the cable test. The upper flange 22 is arranged at the opening of the dewar 21, which plays a role of sealing and connection; the top of the upper flange 22 is provided with a driving mechanism 31, and the driving mechanism 31 is used to control or adjust the actions related to the sealing device 2; the top of the flange pull rod 23 is connected to the bottom of the upper flange 22, and the bottom end of the flange pull rod 23 extends to the inner side of the dewar 21, and the flange pull rod 23 is used to provide an installation platform for the temperature control device 4. The fixing frame 24 is connected to the bottom of the flange pull rod 23, and is used to support or fix the transmission mechanism 32 in the dewar 21.

[0035] In a feasible embodiment of the present invention, 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 driving mechanism 31; the large gear 322 is connected to the transmission shaft 321; the small gear 323 is meshed with the large gear 322 for transmission; the rotating shaft 324 is rotatably arranged on the fixing frame 24; and a winding rod 33 is arranged on the rotating shaft 324. The driving mechanism 31 drives the large gear 322 to rotate. Since the small gear 323 meshes and rotates 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, as the winding rod 33 rotates, the winding of the wires and cables is realized.

[0036] In a feasible embodiment of the present invention, the fixing frame 24 includes a fixing base 241, an outer fixing ring 242 and an inner fixing ring 243, and the outer fixing ring 242 and the inner fixing ring 243 are both arranged 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 arranging both the outer fixing ring 242 and the inner fixing ring 243 on the fixing base 241, and making the two ends of the rotating shaft 324 connected to the outer fixing ring 242 and the inner fixing ring 243 respectively, a stable supporting structure is formed, which can ensure that the rotating shaft 324 remains stable during the rotation process, reduces the vibration and noise caused by instability, and improves the reliability and durability of the entire device.

[0037] The fixed base 241 provides a fixed installation platform for the outer fixing ring 241 and the inner fixing ring 243, so that these components can be installed and removed more easily. This not only simplifies the installation process, but also enables the operation to be completed more quickly when maintenance or replacement of components is required, reducing maintenance costs and time. The stable fixing frame structure can reduce potential safety risks caused by unstable rotating shafts.

[0038] Specifically, when the wires and cables 5 are running with the winding rod 33, the diameter of the winding rod 33 and the hanging weight method are as follows. The corresponding relationship between the winding rod diameter and the hanging weight of wires and cables with different wire gauges is shown in Table 1 and Table 2.

[0039] The corresponding relationship between the winding rod diameter and hanging weight of insulated wires and cables of different wire gauges is shown in Table 1: Table 1. Diameter and hanging weight of insulated wire winding rod:

[0040] The corresponding relationship between the shield and sheath cable winding rod diameter and hanging weight of wires and cables with different wire gauge numbers is shown in Table 2 below.

[0041] Table 2. Diameter and hanging weight of shielded and sheathed cable winding rods

[0042] Therefore, the high and low temperature alternating wire and cable winding test system provided by the present invention can effectively realize the winding motion test of the cable in the temperature range of -269℃~200℃. During the test, the target temperature can be set to any temperature point in the range of -269℃~200℃ according to different test temperature requirements, and the continuous winding motion test of the cable can be carried out. Through this device, the bending and winding performance of the cable under different temperature environments can be obtained, providing important data support for the application of cables in different environments.

[0043] In a feasible embodiment of the present invention, the control device 1 includes an industrial computer, a data acquisition module and a communication module. The industrial computer is used to judge the action state and send action instructions to the actuator, and communicate with each communication module to obtain test-related data and store data. The control software is used to set the number of cable movements and test target temperature parameters required by the test, and at the same time, collect and record the actual number of cable movements and actual temperature data generated during the test. The communication module is a hardware device that realizes communication between the industrial computer and the temperature control device and the wire and cable winding device.

[0044] In the above embodiments, the control device 1 can significantly improve the efficiency and accuracy of the test through automated test control and data collection processes.

[0045] In a feasible embodiment of the present invention, 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 according to the temperature signal fed back by the thermometer, controls the heating power of the heating rod 41 and reaches the target temperature; when the target temperature is lower than the room temperature, the temperature controller determines the difference between the current temperature and the target temperature according to the temperature signal fed back by the thermometer, adjusts the cryogenic medium flow valve 42 to control the output of the cryogenic medium and reaches the target temperature. During the temperature control process, the system temperature can be controlled by one thermometer. At the same time, two to three thermometers can be set as needed during the test to collect the temperatures of the main positions in the test system.

[0046] In the present invention, according to the characteristics of the temperature environment, the room temperature is used as a distinguishing point. The test with a test temperature higher than the room temperature environment is called a high temperature test, and the test with a test temperature lower than the room temperature environment is called a low temperature test. In the high temperature test, the temperature control system is used to control the heating system to achieve a high temperature environment and control the temperature; in the low temperature test, the temperature control system is used to control the flow of the low temperature refrigeration medium (liquid nitrogen, liquid helium) to achieve a low temperature environment and control the temperature. The temperature control error during the test is 0~±2℃.

[0047] During the test, in order to ensure the uniformity of the temperature environment, at least three heating rods need to be deployed during high-temperature tests, and low-temperature refrigerant needs to be infused from three infusion ports during low-temperature tests.

[0048] In a feasible embodiment of the present invention, a cryogenic liquid container is further included, and the cryogenic liquid container is connected to the cryogenic medium flow valve 42. The cryogenic liquid container contains liquid nitrogen or liquid helium to meet the low temperature environment requirements of the cable.

[0049] In a feasible embodiment of the present invention, the driving mechanism 31 is a servo motor, which can achieve accurate control of the number of turns and angle of the rod 33 .

[0050] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0052] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high and low temperature alternating wire and cable winding test system, characterized in that: include: A control device (1) is used to set and collect the number of wire and cable winding movements and test temperature parameters required by the test; A sealed device (2) for providing a specific temperature environment; A wire and cable winding device (3), arranged inside the sealing device (2) and used for winding the wire and cable (5); A temperature control device (4) for controlling the temperature inside the closed 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 winding test system according to claim 1 is characterized in that: The wire and cable winding device (3) comprises: A driving mechanism (31) for providing power; A transmission mechanism (32) connected to the driving mechanism (31); A winding rod (33) is arranged on the transmission mechanism (32), and under the action of the driving mechanism (31), the winding rod (33) rotates; A pulley (34) is arranged on the sealing device (2); the pulley (34) is used for the electric wire and cable (5) to pass around, and the middle position of the electric wire and cable (5) is wound around the winding rod (33) for at least one turn, and the end of the electric wire and cable (5) is connected to a weight (35).

3. The high and low temperature alternating wire and cable winding test system according to claim 2, characterized in that: The sealing device (2) comprises: Dewar (21), open at top; An upper flange (22) is arranged at the opening of the Dewar (21); the driving mechanism (31) is arranged on the top of the upper flange (22); A flange tie rod (23), the top end of which is connected to the bottom of the upper flange (22), and the bottom end of the flange tie rod (23) extends to the inner side of the dewar (21); A fixing frame (24) is connected to the bottom of the flange pull rod (23).

4. The high and low temperature alternating wire and cable winding test system according to claim 3, characterized in that: The transmission mechanism (32) comprises: A transmission shaft (321) connected to the driving mechanism (31); A large gear (322) connected to the transmission shaft (321); A small gear (323) meshing with the large gear (322) for transmission; A rotating shaft (324) is rotatably disposed on the fixing frame (24); and the winding rod (33) is disposed on the rotating shaft (324).

5. The high and low temperature alternating wire and cable winding test system according to claim 4, characterized in that: The fixing frame (24) comprises: Fixed base (241); The outer fixing ring (242) and the inner fixing ring (243) are both arranged 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).

6. The high and low temperature alternating wire and cable winding test system according to any one of claims 1 to 5, characterized in that: The control device comprises: Industrial computer, used to judge the action status and send action instructions to the actuator; Data acquisition module, used to collect the number of cable movements and test target temperature parameters required by the test; A communication module is used to connect the industrial computer and the data acquisition module.

7. The high and low temperature alternating wire and cable winding test system according to claim 6, characterized in that: The temperature control device (4) comprises 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 a 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 winding test 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 winding test 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 winding test system according to claim 2, characterized in that: The driving mechanism (31) is preferably a servo motor.

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