Device for detecting long-term performance of carbon fiber composite cable core

Abstract

The invention discloses a carbon fiber composite material cable core long-term performance detection device, and relates to the field of cable performance tests.The carbon fiber composite material cable core long-term performance detection device comprises a test box, a test cavity is formed in the test box, a bearing unit is arranged on the inner wall of the test cavity, a test piece is borne on the bearing unit, and an electric heating piece and a temperature and humidity sensor are arranged on the inner wall of the test cavity; and a controller is arranged on the test box. According to the long-term performance detection device for the carbon fiber composite material cable core, through cooperative use of the sand wind simulation unit and the moisture simulation unit, single environment simulation and complex environment simulation can be performed according to needs in the aging test process of the carbon fiber composite material cable; therefore, the aging test simulation data of the carbon fiber composite cable is more comprehensive.

Description

Technical Field

[0001] This invention relates to cable performance testing technology, specifically to a device for testing the long-term performance of carbon fiber composite cable cores. Background Technology

[0002] Carbon fiber composite cable cores possess advantages such as light weight, high strength, and corrosion resistance, leading to their widespread application in fields such as power transmission. Their long-term performance directly impacts the safety and reliability of power transmission; therefore, accurate testing of the long-term performance of carbon fiber composite cable cores is crucial.

[0003] During outdoor use, cables operate under long-term overload conditions, resulting in thermal effects from the current. When the load current passes through the cable, it inevitably causes the conductor to heat up, thus raising the cable temperature. Excessive temperature accelerates insulation aging, and the temperature rise often leads to breakdown at weak points in the cable insulation. Cable faults tend to increase in summer. In addition, factors such as sunlight (ultraviolet radiation), changes in ambient temperature, cable heat dissipation conditions, and atmospheric corrosion can all cause aging of the cable insulation and outer sheath. Therefore, it is necessary to test the degree of thermal aging of the cable.

[0004] Thermal aging test chambers are devices used to conduct high-temperature aging tests on the test objects. They can simulate the effects of high-temperature environments on the test objects. However, in actual applications, cables are mainly installed outdoors. The aging factors are not only high temperatures, but also the alternating high and low temperature changes between day and night or the influence of low external temperatures. At the same time, there is the impact of wind, sand and rain. Therefore, thermal aging test chambers cannot fully simulate the application environment of cables during cable aging tests, resulting in insufficient accuracy of aging test results. Summary of the Invention

[0005] The purpose of this invention is to provide a long-term performance testing device for carbon fiber composite cable cores to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a long-term performance testing device for carbon fiber composite cable cores, comprising a test chamber, a test cavity inside the test chamber, a support unit on the inner wall of the test cavity, a test piece supported on the support unit, a heating element and a temperature and humidity sensor on the inner wall of the test cavity, and a controller on the test chamber. The test chamber is equipped with a sandstorm simulation unit and a humidity simulation unit. During the dry heat environment simulation, the test chamber is heated by an electric heating element to simulate a high-temperature environment. At the same time, the sandstorm simulation unit continuously blows sandstorms into the test specimen in the test chamber, which can simulate the aging state of the test specimen in a high-temperature and sandstorm environment. During the humid and hot environment simulation, the test chamber is heated by an electric heating element to simulate a high-temperature environment. At the same time, the test chamber is humidified by a humidity simulation unit, which can simulate the aging state of the test piece under humid and hot conditions. When simulating complex environments, the test specimen inside the test chamber is first subjected to a dry heat environment simulation, and after a certain period of time, a humid heat environment is replaced by a humid simulation unit. Alternatively, the test specimen inside the test chamber is first subjected to a humid heat environment simulation, and then a dry heat environment with wind and sand simulation unit is used to simulate the aging state of the environment.

[0007] Furthermore, the bearing unit includes bearing arc plates fixedly installed on both sides of the inner wall of the test chamber. The bearing arc plates are provided with matching clamping arc plates. Both sides of the bearing arc plates and the clamping arc plates are provided with wing plates. The surface of the wing plate on the bearing arc plate is provided with a threaded groove, and the surface of the wing plate on the clamping arc plate is provided with a mating groove corresponding to the threaded groove. The inner side of the threaded groove is threaded with a locking stud. The test piece is placed between the clamping arc plate and the bearing arc plate.

[0008] Furthermore, the end of the locking stud passes through the mating groove and is threadedly connected to the inner side of the threaded groove.

[0009] Furthermore, a guide sleeve is fixedly connected to the surface of the wing plate on the bearing arc plate, and a guide rod is slidably connected to the inner side of the guide sleeve. A support spring is fixedly connected between one end of the guide rod and the inner wall of the guide sleeve, and the other end of the guide rod is fixedly connected to the wing plate on the pressing arc plate.

[0010] Furthermore, the sandstorm simulation unit includes an air outlet on the inner wall of the test chamber and an installation slot inside the test chamber. An air guide pipe connects the air outlet and the installation slot. A one-way valve is installed on the outside of the air guide pipe. A diversion fan is installed inside the installation slot. A transfer chamber is provided at the bottom of the test chamber. A grid plate is provided between the transfer chamber and the test chamber. The installation slot is connected to the transfer chamber. The transfer chamber contains fine sand.

[0011] Furthermore, the humidity simulation unit includes a water storage chamber located inside the test chamber. The test chamber has an internal cavity, and a delivery pump is installed inside the cavity. The delivery pump is externally connected to an inlet pipe and a delivery pipe. A rigid water pipe is installed at the top of the test chamber. Several atomizing nozzles are equidistantly installed on the surface of the rigid water pipe. The end of the inlet pipe away from the delivery pump is connected to the inside of the water storage chamber, and the end of the delivery pipe away from the delivery pump is fixedly connected to the rigid water pipe.

[0012] Furthermore, a barrier filter plate is installed at the bottom of the inner wall of the transfer chamber, the bottom of the transfer chamber is connected to the water storage chamber, and a filter cotton layer is provided between the water storage chamber and the transfer chamber.

[0013] Furthermore, the test chamber has a working chamber inside, and a first pipe connected to the bottom of the mounting slot is installed inside the working chamber. A second pipe connected to the transfer chamber is also installed inside the working chamber. A tee connector is installed between the first and second pipes, and a third pipe is installed at the bottom of the tee connector. An exhaust pipe is fixedly connected to the bottom of the second pipe. A first solenoid valve is installed on the outside of the first, second, and third pipes and the exhaust pipe. A sand storage chamber is opened inside the test chamber, and a sand discharge pipe is installed at the bottom of the sand storage chamber. A second solenoid valve is installed on the sand discharge pipe.

[0014] Furthermore, the suction end of the third tube corresponds to the discharge end of the sand discharge tube, and a collection box corresponding to the positions of the third tube and the sand discharge tube is placed inside the working chamber.

[0015] Furthermore, an air guide plate is rotatably connected inside the air outlet, and a motion chamber is opened inside the test box. A gear coaxially arranged with the air guide plate is rotatably connected to the inner wall of the motion chamber. A rack is slidably connected to the inner wall of the motion chamber through a guide frame. A drive wheel is rotatably connected to the inner wall of the motion chamber. The drive wheel is driven by a motor. A linkage rod is rotatably connected between the drive wheel and the rack. When the drive wheel rotates, the linkage rod drives the rack to perform linear reciprocating motion along the guide direction of the guide frame.

[0016] Compared with the prior art, the long-term performance testing device for carbon fiber composite cable cores provided by the present invention has the following advantages: 1. The long-term performance testing device for carbon fiber composite cable cores, through the combined use of wind and sand simulation unit and humidity simulation unit, can perform single environment simulation and complex environment simulation as needed during the aging test of carbon fiber composite cables, thereby making the aging test simulation data of carbon fiber composite cables more comprehensive.

[0017] 2. The long-term performance testing device for carbon fiber composite cable cores, through the cooperation of the first pipe, the second pipe, the third pipe, the first solenoid valve, the second solenoid valve, the sand storage chamber, and the sand discharge pipe, allows for the continued supply of fine sand when simulating a humid environment followed by a dry and hot sandstorm simulation. This makes the testing mode selection of the device more diverse and can meet the needs of different complex environment simulations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the test chamber provided in an embodiment of the present invention; Figure 3 This is a partial cross-sectional view of the test chamber provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the test chamber provided in an embodiment of the present invention; Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of a partial lateral structure of the test chamber provided in an embodiment of the present invention; Figure 7 Provided for embodiments of the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the load-bearing unit structure provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Test chamber; 2. Heating element; 21. Temperature and humidity sensor; 22. Controller; 3. Bearing arc plate; 31. Pressing arc plate; 32. Wing plate; 33. Threaded groove; 34. Locking stud; 35. Guide sleeve; 36. Guide rod; 37. Support spring; 38. Mating groove; 4. Air outlet; 41. Air duct; 42. One-way valve; 43. Drain fan; 44. Transfer chamber; 45. Grid plate; 5. Water storage chamber; 51. Delivery pump; 52. 53. Liquid inlet pipe; 54. Liquid delivery pipe; 55. Hard water pipe; 56. Atomizing nozzle; 57. Filter cotton layer; 68. Barrier filter plate; 69. First pipe; 60. Second pipe; 61. T-joint; 62. Third pipe; 63. First solenoid valve; 64. Sand storage chamber; 65. Sand discharge pipe; 66. Second solenoid valve; 67. Exhaust pipe; 68. Collection box; 79. Air guide plate; 70. Gear; 71. Rack; 72. Drive wheel; 73. Linkage rod. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Example 1: Please see Figures 1-8 A long-term performance testing device for carbon fiber composite cable cores includes a test chamber 1, a test cavity inside the test chamber 1, a bearing unit on the inner wall of the test cavity, a test piece on the bearing unit, an electric heating element 2 and a temperature and humidity sensor 21 on the inner wall of the test cavity, and a controller 22 on the test chamber 1. The controller 22 can automatically control the testing process, so that different environmental simulation tests can be automatically performed by simply selecting the mode. Test chamber 1 is equipped with a sandstorm simulation unit and a humidity simulation unit; During the dry heat environment simulation, the test chamber is heated by the electric heating element 2 to simulate the high temperature environment. At the same time, the sandstorm simulation unit continuously blows sandstorms to the test piece in the test chamber 1, which can simulate the aging state of the test piece in a high temperature and sandstorm environment. During the humid and hot environment simulation, the test chamber is heated by the electric heating element 2 to simulate the high temperature environment. At the same time, the test chamber is humidified by the humidity simulation unit, which can simulate the aging state of the test piece under humid and hot conditions. When simulating complex environments, the test specimen inside the test chamber is first subjected to a dry heat environment simulation, and after a certain period of time, a humid heat environment is replaced by a humid simulation unit. Alternatively, the test specimen inside the test chamber is first subjected to a humid heat environment simulation, and then a dry heat environment with wind and sand simulation unit is used to simulate the aging state of the environment.

[0023] The specific structure of the bearing unit is described below. The bearing unit includes bearing arc plates 3 fixedly installed on both sides of the inner wall of the test chamber. A matching clamping arc plate 31 is provided on the bearing arc plate 31. Wing plates 32 are provided on both sides of the bearing arc plate 3 and the clamping arc plate 31. The surface of the wing plate 32 on the bearing arc plate 3 is provided with a threaded groove 33. The surface of the wing plate 32 on the clamping arc plate 31 is provided with a mating groove 38 corresponding to the threaded groove 33. The inner side of the threaded groove 33 is threadedly connected with a locking stud 34. The test piece is placed between the clamping arc plate 31 and the bearing arc plate 3.

[0024] It should be noted that the end of the locking stud 34 passes through the mating groove 38 and is threaded to the inner side of the threaded groove 33, so that the bearing arc plate 3 and the pressing arc plate 31 can be stably connected by the locking stud 34, and the test piece can be clamped and fixed between the two.

[0025] It should be further noted that a guide sleeve 35 is fixedly connected to the surface of the wing plate 32 located on the bearing arc plate 3, and a guide rod 36 is slidably connected to the inner side of the guide sleeve 35. A support spring 37 is fixedly connected between one end of the guide rod 36 and the inner wall of the guide sleeve 35, and the other end of the guide rod 36 is fixedly connected to the wing plate 32 located on the pressing arc plate 3. This allows the pressing arc plate 31 to be lifted up under the support of the support spring 37 when not in operation, keeping it separated from the bearing arc plate 3, which facilitates the placement of the test piece.

[0026] The specific structure of the sandstorm simulation unit is described below. The sandstorm simulation unit includes an air outlet 4 opened on the inner wall of the test chamber and an installation slot opened inside the test box 1. The position of the air outlet 4 corresponds to the test piece. An air guide pipe 41 connects the air outlet 4 and the installation slot. A one-way valve 42 is installed on the outside of the air guide pipe 41. A diversion fan 43 is installed inside the installation slot. A transfer chamber 44 is set at the bottom of the test chamber. A grid plate 45 is set between the transfer chamber 44 and the test chamber. The installation slot is connected to the transfer chamber 44. The interior of the transfer chamber 44 contains fine sand.

[0027] During the sandstorm simulation, the air inside the test chamber is drawn by the airflow fan 43, and the fine sand inside moves synchronously with the airflow during the flow, which can continuously contact and rub against the surface of the test piece, thereby better simulating the actual use environment of the test piece.

[0028] The specific structure of the humidity simulation unit is described below. The humidity simulation unit includes a water storage chamber 5 inside the test chamber 1. The test chamber 1 has an internal cavity, and a delivery pump 51 is installed inside the cavity. The delivery pump 51 is externally connected to an inlet pipe 52 and a delivery pipe 53. A rigid water pipe 54 is installed at the top inside the test chamber. Several atomizing nozzles 55 are equidistantly installed on the surface of the rigid water pipe 54. The end of the inlet pipe 52 away from the delivery pump 51 is connected to the inside of the water storage chamber 5, and the end of the delivery pipe 53 away from the delivery pump 51 is fixedly connected to the rigid water pipe 54.

[0029] It should be noted that a barrier filter plate 57 is installed at the bottom of the inner wall of the transfer chamber 44, the bottom of the transfer chamber 44 is connected to the water storage chamber 5, and a filter cotton layer 56 is provided between the water storage chamber 5 and the transfer chamber 44.

[0030] When simulating a humid environment, the clean water in the water storage chamber 5 can be delivered to the rigid water pipe 54 through the cooperation between the delivery pump 51, the inlet pipe 52 and the delivery pipe 53. This allows the water to be sprayed into the test chamber in the form of water mist from the bottom of the atomizing nozzle 55, thereby simulating a humid environment.

[0031] During the testing process, a single environmental simulation can be performed to test its aging state, or multiple environmental simulations can be combined as needed to better simulate the actual environment of certain special areas, making the test data of the test piece more comprehensive.

[0032] Example 2: Please see Figure 4 This embodiment provides a technical solution based on the above embodiments: The test chamber 1 has a working chamber inside, and a first pipe 6 connected to the bottom of the mounting groove is installed inside the working chamber. A second pipe 61 connected to the transfer chamber 44 is installed inside the working chamber. A three-way connector 62 is installed between the first pipe 6 and the second pipe 61. A third pipe 63 is installed at the bottom of the three-way connector 62. An exhaust pipe 68 is fixedly connected to the bottom of the second pipe 61. A first solenoid valve 64 is installed on the outside of the first pipe 6, the second pipe 61, the third pipe 63 and the exhaust pipe 68. A sand storage chamber 65 is opened inside the test chamber 1. A sand discharge pipe 66 is installed at the bottom of the sand storage chamber 65. A second solenoid valve 67 is installed on the sand discharge pipe 66.

[0033] It should be noted that the suction end of the third pipe 63 corresponds to the discharge end of the sand discharge pipe 66.

[0034] In addition, a collection box 69 corresponding to the position of the third pipe 63 and the sand discharge pipe 66 is placed inside the working chamber, so that the fine sand that is not sucked in by the third pipe 63 can be collected and processed for subsequent treatment.

[0035] It should be added that a sand replenishment pipe is installed on the surface of the test chamber 1, which is connected to the top of the sand storage chamber 65, and a sealing cap is provided at the top of the sand replenishment pipe.

[0036] During operation, when a humid and hot environment simulation is followed by a high-temperature sandstorm environment simulation, the fine sand inside the test chamber is in a humid state, making it impossible to continue simulating a dry and hot sandstorm environment. At this time, by closing the first solenoid valve 64 on the second pipe 61 and opening the exhaust pipe 68 and the first solenoid valves 64 on the first pipe 6 and the third pipe 63, the transfer chamber 44 is connected to the installation slot through the working chamber. Then, by opening the second solenoid valve 67, fine sand can be continuously discharged downward from the bottom of the sand discharge pipe 66. At this time, under the traction of the diversion fan 43, the fine sand discharged from the bottom of the sand discharge pipe 66 can be sucked into the interior of the third pipe 63 and discharged from the air outlet 4 through the air guide pipe 41 into the test chamber. This allows the test equipment to meet the simulation of various complex environments, making the accuracy of the long-term performance test results of the carbon fiber composite cable core higher.

[0037] Example 3: Please see Figures 6-7This embodiment provides a technical solution based on the above embodiments: an air guide plate 7 is rotatably connected inside the air outlet 4, a motion chamber is opened inside the test chamber 1, a gear 71 coaxially arranged with the air guide plate 7 is rotatably connected to the inner wall of the motion chamber, a rack 72 is slidably connected to the inner wall of the motion chamber through a guide frame, a drive wheel 73 is rotatably connected to the inner wall of the motion chamber, the drive wheel 73 is driven by a motor, and a linkage rod 74 is rotatably connected between the drive wheel 73 and the rack 72. When the drive wheel 73 rotates, the linkage rod 74 drives the rack 72 to perform linear reciprocating motion along the guide direction of the guide frame.

[0038] During operation, the drive wheel 73 is driven by the motor to rotate, which causes the linkage rod 74 to drive the rack 72 to reciprocate linearly along the guide direction of the guide frame. During the reciprocating motion, the rack 72 drives the gear 71 to reciprocate within a certain angle range, which can drive the air guide plate 7 to reciprocate synchronously. This ensures that when sand is sprayed out at the air outlet 4, it will not continuously blow sand onto a certain part of the test piece, thus better simulating the actual working environment of the test piece.

[0039] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A long-term performance testing device for carbon fiber composite cable cores, comprising a test chamber (1), wherein a test cavity is provided inside the test chamber (1), and a bearing unit is provided on the inner wall of the test cavity, and a test piece is supported on the bearing unit, characterized in that, The inner wall of the test chamber is equipped with an electric heating element (2) and a temperature and humidity sensor (21), and the test box (1) is equipped with a controller (22). The test box (1) is equipped with a sandstorm simulation unit and a humidity simulation unit; During the dry heat environment simulation, the test chamber is heated by the electric heating element (2) to simulate the high temperature environment. At the same time, the sandstorm simulation unit continuously blows sandstorms to the test piece in the test box (1), which can simulate the aging state of the test piece in a high temperature and sandstorm environment. During the humid and hot environment simulation, the test chamber is heated by the electric heating element (2) to simulate the high temperature environment. At the same time, the test chamber is humidified by the humidity simulation unit, which can simulate the aging state of the test piece under humid and hot conditions. When simulating complex environments, the test specimen inside the test chamber is first subjected to a dry heat environment simulation, and after a certain period of time, a humid heat environment is replaced by a humid simulation unit. Alternatively, the test specimen inside the test chamber is first subjected to a humid heat environment simulation, and then a dry heat environment with wind and sand simulation unit is used to simulate the aging state of the environment.

2. The long-term performance testing device for carbon fiber composite cable cores according to claim 1, characterized in that, The bearing unit includes a bearing arc plate (3) fixedly installed on both sides of the inner wall of the test chamber. A matching clamping arc plate (31) is provided on the bearing arc plate (31). Both sides of the bearing arc plate (3) and the clamping arc plate (31) are provided with wing plates (32). The surface of the wing plate (32) on the bearing arc plate (3) is provided with a threaded groove (33). The surface of the wing plate (32) on the clamping arc plate (31) is provided with a mating groove (38) corresponding to the threaded groove (33). The inner side of the threaded groove (33) is threadedly connected with a locking stud (34). The test piece is placed between the clamping arc plate (31) and the bearing arc plate (3).

3. The long-term performance testing device for carbon fiber composite cable cores according to claim 2, characterized in that, The end of the locking stud (34) passes through the mating groove (38) and is threaded to the inner side of the threaded groove (33).

4. The long-term performance testing device for carbon fiber composite cable cores according to claim 3, characterized in that, A guide sleeve (35) is fixedly connected to the surface of the wing plate (32) located on the bearing arc plate (3). A guide rod (36) is slidably connected to the inner side of the guide sleeve (35). A support spring (37) is fixedly connected between one end of the guide rod (36) and the inner wall of the guide sleeve (35). The other end of the guide rod (36) is fixedly connected to the wing plate (32) located on the pressing arc plate (3).

5. The long-term performance testing device for carbon fiber composite cable cores according to claim 4, characterized in that, The sandstorm simulation unit includes an air outlet (4) on the inner wall of the test chamber and an installation slot inside the test box (1). An air guide pipe (41) is connected between the air outlet (4) and the installation slot. A one-way valve (42) is installed on the outside of the air guide pipe (41). A diversion fan (43) is installed inside the installation slot. A transfer chamber (44) is provided at the bottom of the test chamber. A grid plate (45) is provided between the transfer chamber (44) and the test chamber. The installation slot is connected to the transfer chamber (44). Fine sand is contained inside the transfer chamber (44).

6. The long-term performance testing device for carbon fiber composite cable cores according to claim 5, characterized in that, The humidity simulation unit includes a water storage chamber (5) inside the test chamber (1). The test chamber (1) has an internal cavity, and a delivery pump (51) is installed inside the cavity. The delivery pump (51) is connected to an inlet pipe (52) and a delivery pipe (53). A rigid water pipe (54) is installed at the top inside the test chamber. Several atomizing nozzles (55) are installed at equal intervals on the surface of the rigid water pipe (54). The end of the inlet pipe (52) away from the delivery pump (51) is connected to the inside of the water storage chamber (5), and the end of the delivery pipe (53) away from the delivery pump (51) is fixedly connected to the rigid water pipe (54).

7. The long-term performance testing device for carbon fiber composite cable cores according to claim 6, characterized in that, A barrier filter plate (57) is installed at the bottom of the inner wall of the transfer chamber (44). The bottom of the transfer chamber (44) is connected to the water storage chamber (5). A filter cotton layer (56) is provided between the water storage chamber (5) and the transfer chamber (44).

8. The long-term performance testing device for carbon fiber composite cable cores according to claim 7, characterized in that, The test chamber (1) has a working chamber inside. A first pipe (6) connected to the bottom of the mounting slot is installed inside the working chamber. A second pipe (61) connected to the transfer chamber (44) is installed inside the working chamber. A three-way connector (62) is installed between the first pipe (6) and the second pipe (61). A third pipe (63) is installed at the bottom of the three-way connector (62). An exhaust pipe (68) is fixedly connected to the bottom of the second pipe (61). A first solenoid valve (64) is installed on the outside of the first pipe (6), the second pipe (61), the third pipe (63) and the exhaust pipe (68). A sand storage chamber (65) is opened inside the test chamber (1). A sand discharge pipe (66) is installed at the bottom of the sand storage chamber (65). A second solenoid valve (67) is installed on the sand discharge pipe (66).

9. The long-term performance testing device for carbon fiber composite cable cores according to claim 8, characterized in that, The suction end of the third tube (63) corresponds to the discharge end of the sand discharge tube (66), and a collection box (69) corresponding to the position of the third tube (63) and the sand discharge tube (66) is placed inside the working chamber.

10. The long-term performance testing device for carbon fiber composite cable cores according to claim 9, characterized in that, The air outlet (4) is rotatably connected to a guide plate (7). The test chamber (1) has a motion chamber inside. The inner wall of the motion chamber is rotatably connected to a gear (71) coaxially arranged with the guide plate (7). The inner wall of the motion chamber is slidably connected to a rack (72) through a guide frame. The inner wall of the motion chamber is rotatably connected to a drive wheel (73). The drive wheel (73) is driven by a motor. The drive wheel (73) and the rack (72) are rotatably connected to a linkage rod (74). When the drive wheel (73) rotates, the linkage rod (74) drives the rack (72) to perform linear reciprocating motion along the guide direction of the guide frame.

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