A high-temperature tensile testing device and method for processing fire-resistant cables

Abstract

This invention discloses a high-temperature tensile testing device and method for processing fire-resistant cables in the field of cable testing technology. The high-temperature tensile testing device includes a machine base, with a tail-end fixing component, a tail-end rotating component, and a clamping rotating component arranged sequentially on top of the machine base. This invention's high-temperature tensile testing device has multiple operating modes, capable of performing high-temperature baking tests, high-temperature baking tensile tests, high-temperature baking torsion tests, and high-temperature baking torsion tensile tests on cables. It has multiple application scenarios and can perform corresponding testing operations according to different production testing requirements. The cable has two installation methods: a rotating connection and a fixed connection, which can be switched according to different testing operations. Furthermore, the rotating clamping and fixed clamping structures are specifically designed. It boasts a high degree of automation, high accuracy and efficiency, and reduces labor costs.

Description

Technical Field

[0001] This invention relates to a cable tensile testing device, specifically a high-temperature tensile testing device and method for processing fire-resistant cables, belonging to the field of cable testing technology. Background Technology

[0002] Fire-resistant cables are cables that can maintain normal operation for a certain period of time in the event of an external flame during a fire, preserving the integrity of the cable line and the normal operation of the equipment. Therefore, fire-resistant cables need to undergo aging tests before being put into production and use to understand their fire resistance, tensile strength, and other properties.

[0003] Conventional cable testing equipment typically involves placing the cable in a test chamber and heating it to age it. However, due to uneven heating, the test accuracy is poor. Moreover, most testing equipment struggles to maintain tensile testing at high temperatures and has limited operating modes. Tensile, heating, and torsion tests are mostly conducted separately, resulting in a low degree of automation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a high-temperature tensile testing device and method for processing fire-resistant cables, thereby solving the problems mentioned in the background section.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A high-temperature tensile testing device for processing fireproof cables includes a machine base, and a tail end fixing component, a tail end rotating component, and a clamping rotating component are arranged on the top of the machine base in sequence.

[0007] The tail end fixing assembly includes a fourth bracket, a fifth bracket, and a sixth bracket, and the sixth bracket is provided with two sets of wire clamping blocks that move in opposite directions.

[0008] The tail end rotating assembly includes a seventh bracket and an eighth bracket, and the seventh bracket is provided with two sets of semi-circular needle roller bearings that move in opposite directions.

[0009] The clamping and rotating assembly includes an outer body, a front cover, a main shaft, a pull rod, a telescopic cover, and a third electric cylinder. The front cover is located at the front end of the outer body, and the telescopic cover is located at the rear end of the outer body. The main shaft, the outer body, the front cover, and the telescopic cover are concentric, and the front end of the main shaft is fixedly connected to the outer body.

[0010] Preferably, the upper surface of the machine platform is provided with a sliding first bracket and a fixedly connected high-temperature test bracket and a first electric cylinder. The telescopic end of the first electric cylinder is fixedly connected to the first bracket. The upper end of the first bracket is provided with a fixedly connected second bracket and a third bracket. The side of the second bracket is provided with a through first opening. The second bracket is provided with a fixedly connected first motor. The first motor shaft is provided with a fixedly connected first gear. The third bracket is provided with a linear bearing. The high-temperature test bracket is provided with an isolation box. A flame head is provided above the isolation box.

[0011] Preferably, the fourth bracket has a fixedly connected second electric cylinder inside, and the fifth and sixth brackets are rotatably connected to an array of first drive shafts. Each of the first drive shafts has a fixedly connected first push block and second push block. The sixth bracket has an array of first guide shafts inside, and the wire clamping block slides along the first guide shaft. When the first push block rotates, it drives the wire clamping block to move. Each of the second push blocks has a rotating wheel at its lower end. A slidable fastening block is provided below the second electric cylinder. The second electric cylinder pushes the fastening block forward, and the guide block pushes the wheel and the second push block apart, thereby driving the first push block to rotate synchronously.

[0012] Preferably, the seventh bracket is provided with an array of second guide shafts, and the semi-circular needle roller bearing slides along the second guide shaft. An array of second drive shafts is rotatably provided between the seventh bracket and the eighth bracket. The second drive shaft is provided with a fixedly connected second gear and a third push block. The third push block has the same structure as the first push block. When the third push block rotates, it drives the semi-circular needle roller bearing to move, and the second gear meshes with each other.

[0013] The eighth bracket is equipped with a second motor on its side. A third gear is fixedly connected to the shaft of the second motor. The third gear meshes with the second gear. The third gear drives the second gear to rotate in opposite directions. The second gear drives the second drive shaft and the third push block to rotate, thereby driving the semi-circular needle roller bearings to move in opposite directions.

[0014] Preferably, the outer body is installed inside the linear bearing, and a third electric cylinder is fixedly connected to both sides of the second bracket. The third electric cylinder pushes the telescopic cover to extend and retract, and the main shaft rotates in the first opening.

[0015] Preferably, the outer body has a circumferentially distributed inner groove, the front cover has an axially distributed first guide groove, the front end of the front cover has a top plate, the center of the top plate has an enlarged receiving port, the top plate, the front cover and the outer body all have through circular slots at their centers, and the top plate, the front cover and the outer body are fixedly connected by fasteners.

[0016] Preferably, each of the first guide grooves is provided with a sliding clamping block that is slidably engaged. The sliding clamping block is provided with a pulling slot, and a rotating pull rod is provided in the inner groove. One end of the pull rod is inserted into the pulling slot, and the other end of the pull rod is provided with a rotating push wheel.

[0017] Preferably, the main shaft is provided with a fixedly connected fourth gear and a sliding fourth push block. The fourth gear meshes with the first gear. The main shaft is provided with a second guide groove. The fourth push block slides along the second guide groove. The rear end face of the fourth push block is provided with a rotating ring that is rotatably engaged. The fourth push block is provided with circumferentially distributed push grooves. The push wheel slides in the push grooves.

[0018] Preferably, the rotating ring is provided with a rotating push ring, the rear end of the telescopic cover is provided with a slot, the extension rods on both sides of the push ring pass through the slot, and the telescopic end of the third electric cylinder is provided with a fixedly connected mounting block, which is rotatably connected to the extension rods on both sides of the push ring.

[0019] A method for high-temperature tensile testing of fire-resistant cables includes the following steps:

[0020] Place the section of cable to be tested between the clamping block and the semi-circular needle roller bearing. Insert the other end of the cable into the enlarged receiving port, pass through the top plate, front cover, and outer body, and stop after extending into the outer body. The third electric cylinder pushes the rotating ring and the fourth push block forward, and the pull rod rotates to drive the sliding clamping block to clamp the cable.

[0021] When a high-temperature baking test of the cable is required, the second motor drives the second drive shaft and the third push block to rotate. The third push block drives the semi-circular needle roller bearings to clamp the cable in opposite directions. The first motor drives the main shaft, the fourth push block, the outer body, the pull rod, and the front cover to rotate. The flame head sprays fire to test the fire resistance of the outer layer of the cable.

[0022] When a high-temperature baking and tensile test of the cable is required, the above-mentioned high-temperature baking operation is performed first. The flame head can be started and stopped autonomously. The second electric cylinder pushes the fastening block forward, causing the second pushing block, the first drive shaft, and the first pushing block to rotate. The clamping blocks move forward in opposite directions to clamp and lock the cable. The semi-circular needle roller bearing retracts and disengages from the cable. The first electric cylinder pulls the first bracket, outer body, front cover, main shaft, and pull rod backward, thereby stretching the cable and testing its thermal tensile properties.

[0023] When a high-temperature baking and twisting test of a cable is required, the above-mentioned high-temperature baking operation of the cable is performed first. The flame head can be started and stopped independently. The second electric cylinder pushes the fastening block forward, which drives the second push block, the first drive shaft, and the first push block to rotate. The clamping blocks move forward in opposite directions to clamp and lock the cable. The semi-circular needle roller bearing retracts and disengages from the cable. The first motor drives the main shaft, the fourth push block, the outer body, the front cover, and the pull rod to rotate, thereby causing the cable to rotate and twist, and testing the thermal twisting of the cable.

[0024] When a high-temperature baking torsion and tensile test of a cable is required, first perform the high-temperature baking operation described above, and then perform the high-temperature baking tensile test and the high-temperature baking torsion test of the cable simultaneously to test the thermal torsion and tensile condition of the cable.

[0025] The beneficial effects of this invention are:

[0026] 1. The high-temperature tensile testing equipment of this invention has multiple operating modes and can perform high-temperature baking test, high-temperature baking tensile test, high-temperature baking torsion test, and high-temperature baking torsion tensile test of cables. It has multiple application scenarios and can perform corresponding test operations according to different production test requirements.

[0027] 2. The high-temperature tensile testing equipment of this invention has two installation methods for the cable: one is a rotating connection and the other is a fixed connection. It can be replaced according to different test operations. The rotating clamping and fixed clamping structures are specifically designed. Since the rotating clamping requires less force, it adopts a direct connection operation with motor gear meshing. Only a semi-circular needle roller bearing needs to contact the cable for rotation assistance. The fixed clamping needs to prevent the cable from falling off during testing. Therefore, a hard locking structure design is adopted. The fastening block drives the clamping block to clamp the cable, reducing the risk of falling off.

[0028] 3. In the high-temperature tensile testing equipment of the present invention, the telescopic cover can extend and retract along with the movement of the fourth push block, which can effectively protect the coordinated operation of the fourth push block and the push wheel, prevent debris from falling into the equipment during operation and affecting the cable clamping effect, and also prevent the staff from being pinched, thus providing better safety.

[0029] 4. The high-temperature tensile testing equipment of the present invention is simple and quick to operate, highly automated, and requires little manual intervention. Only the cable to be tested needs to be placed in the test, and subsequent testing operations can be completed automatically. It is accurate, efficient, and reduces labor costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the high-temperature tensile testing equipment in an embodiment of the present invention;

[0032] Figure 2 This is a partial structural diagram of the high-temperature tensile testing equipment in an embodiment of the present invention;

[0033] Figure 3 This is a structural schematic diagram of the combined state of the tail end fixing component and the tail end rotating component in an embodiment of the present invention;

[0034] Figure 4This is a schematic diagram of the tail end fixing component in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the tail-end rotating assembly in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the clamping and rotating assembly in an embodiment of the present invention;

[0037] Figure 7 This is a partial structural schematic diagram of the clamping and rotating assembly in an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the main shaft structure in an embodiment of the present invention;

[0039] Figure 9 This is a partial exploded view of the clamping and rotating assembly in an embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the structure when the telescopic cover and the third electric cylinder are installed in an embodiment of the present invention;

[0041] In the diagram: 1. Machine base; 2. Tail end fixing assembly; 3. Tail end rotating assembly; 4. Outer body; 5. Front cover; 6. Main shaft; 7. Tie rod; 8. Telescopic cover; 9. Third electric cylinder; 11. First bracket; 12. Second bracket; 13. Third bracket; 14. High temperature test bracket; 15. First electric cylinder; 16. First motor; 21. Fourth bracket; 22. Fifth bracket; 23. Sixth bracket; 24. First drive shaft; 25. Fastening block; 26. Second electric cylinder; 27. Guide frame; 31. Seventh bracket; 32. Eighth bracket; 33. Second motor; 34. Second drive shaft; 41. First annular slot; 42. Second annular slot; 43. Inner groove; 51. First guide groove; 52. Top plate; 53. Enlarged receiving port; 61. Fourth gear; 62. Rotating ring; 63. Fourth push block; 71. Second opening; 72. Sliding clamp; 73. Push wheel; 81. Slot; 91. Mounting block; 121. First opening; 131. Linear bearing; 141. Isolation box; 142. Flamethrower head; 161. First gear; 231. First guide shaft; 232. Wire clamping block; 241. First push block; 242. Second push block; 243. Rotating wheel; 251. Guide block; 271. Guide column; 311. Second guide shaft; 312. Semi-circular needle roller bearing; 313. Third push block; 331. Third gear; 341. Second gear; 611. Second guide groove; 621. Push ring; 631. Push groove; 721. Pulling groove. Detailed Implementation

[0042] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 10 As shown in the figure, this embodiment provides a high-temperature tensile testing device for processing fireproof cables. The high-temperature tensile testing device includes a machine base 1. A tail end fixing component 2, a tail end rotating component 3 and a clamping rotating component are arranged on the top of the machine base 1. The tail end fixing component 2, the tail end rotating component 3 and the clamping rotating component are arranged in sequence.

[0044] Furthermore, the upper surface of the machine base 1 is provided with a sliding first support 11 and a fixedly connected high temperature test support 14 and a first electric cylinder 15. The first support 11 is moved and guided by the slide rail slider assembly. The telescopic end of the first electric cylinder 15 is fixedly connected to the first support 11, and the first electric cylinder 15 pushes the first support 11 to move.

[0045] Specifically, the upper end of the first bracket 11 is provided with a second bracket 12 and a third bracket 13 that are fixedly connected. The side of the second bracket 12 is provided with a through first opening 121. The second bracket 12 is provided with a first motor 16 that is fixedly connected. The first gear 161 is fixedly connected on the shaft of the first motor 16. The third bracket 13 is provided with a linear bearing 131 that is concentric with the first opening 121. The high temperature test bracket 14 is provided with an isolation box 141. A flame head 142 is provided above the isolation box 141.

[0046] Furthermore, the tail end fixing component 2 includes a fourth bracket 21, a fifth bracket 22 and a sixth bracket 23. The fourth bracket 21, the fifth bracket 22 and the sixth bracket 23 are all fixed on the machine base 1. The sixth bracket 23 is provided with two sets of wire clamping blocks 232 that move in opposite directions.

[0047] Specifically, the fourth bracket 21 has a fixedly connected second electric cylinder 26 inside. The fifth bracket 22 and the sixth bracket 23 are rotatably connected to an array of first drive shafts 24. The first drive shaft 24 is fixedly connected to a first push block 241 and a second push block 242. The sixth bracket 23 has an array of first guide shafts 231 inside. The wire clamping block 232 slides along the first guide shaft 231. The first push block 241 is also provided with a through sliding groove. The side of the wire clamping block 232 is equipped with a rotating push column. The push column on the side of the wire clamping block 232 is inserted into the sliding groove of the first push block 241. When the first push block 241 rotates, it drives the wire clamping block 232 to move towards each other to clamp the cable. The lower end of the second push block 242 is provided with a rotating wheel 243 that is rotatably engaged.

[0048] Below the second electric cylinder 26, there is a sliding fastening block 25 and a guide frame 27. Guide blocks 251 are provided on both sides of the fastening block 25. Guide columns 271 are arranged in an array inside the guide frame 27. The guide blocks 251 and the guide columns 271 are slidably engaged. The telescopic end of the second electric cylinder 26 is fixedly connected to the fastening block. The second electric cylinder 26 pushes the fastening block forward. The guide block 251 pushes the rotating wheel 243 and the second pushing block 242 rotates. The second pushing block 242 drives the first pushing block 241 to rotate through the first drive shaft 24. The first pushing block 241 drives the clamping block 232 to move towards each other.

[0049] Furthermore, the tail end rotating assembly 3 includes a seventh bracket 31 and an eighth bracket 32, both of which are fixed on the machine base 1. The seventh bracket 31 is provided with two sets of semi-circular needle roller bearings 312 that move in opposite directions.

[0050] Specifically, the seventh bracket 31 is provided with an array of second guide shafts 311, and the semi-circular needle roller bearings 312 slide along the second guide shafts 311. The side of the semi-circular needle roller bearings 312 is also provided with rotating push columns. The seventh bracket 31 and the eighth bracket 32 ​​are rotatably provided with an array of second drive shafts 34. The second drive shaft 34 is provided with a fixedly connected second gear 341 and a third push block 313. The third push block 313 has the same structure as the first push block 241. The push column on the side of the semi-circular needle roller bearings 312 is inserted into the sliding groove of the third push block 313. The second gears 341 mesh with each other. The side of the eighth bracket 32 ​​is provided with a second motor 33, which is also fixed on the machine base 1. The shaft of the second motor 33 is provided with a fixedly connected third gear 331. The third gear 331 meshes with the second gear 341. The third gear 331 drives the second gear 341 to rotate in opposite directions. The second gear 341 drives the second drive shaft 34 and the third push block 313 to rotate, thereby driving the semi-circular needle roller bearings 312 to move in opposite directions.

[0051] Furthermore, the clamping and rotating assembly includes an outer body 4, a front cover 5, a main shaft 6, a pull rod 7, a telescopic cover 8, and a third electric cylinder 9. The outer body 4 is installed in the linear bearing 131. The front cover 5 is provided at the front end of the outer body 4, and the telescopic cover 8 is provided at the rear end of the outer body 4. The telescopic cover 8 has a bellows-like structure. The third electric cylinder 9 is fixedly connected to both sides of the second bracket 12. The third electric cylinder 9 pushes the telescopic cover 8 to extend and retract. The main shaft 6 rotates in the first opening 121. The main shaft 6, the outer body 4, the front cover 5, and the telescopic cover 8 are concentric. The front end of the main shaft 6 is fixedly connected to the outer body 4.

[0052] Specifically, the outer body 4 is provided with a first annular slot 41 and a second annular slot 42 on the outside. The linear bearing 131 is sleeved on the first annular slot 41. The front end of the telescopic cover 8 is rotatably connected to the second annular slot 42. The outer body 4 is provided with a circumferentially distributed inner groove 43. The front cover 5 is provided with an axially distributed first guide groove 51. The front end of the front cover 5 is provided with a top plate 52. The center of the top plate 52 is provided with an enlarged receiving port 53. The top plate 52, the front cover 5 and the outer body 4 are all provided with through circular slots. The top plate 52, the front cover 5 and the outer body 4 are fixedly connected by fasteners.

[0053] Each of the first guide grooves 51 is provided with a sliding clamping block 72 that is slidably engaged. The sliding clamping block 72 is provided with a pulling slot 721. The inner groove 43 is provided with a rotating pull rod 7. The center of the pull rod 7 is provided with a second opening 71. The rotating shaft passes through the second opening 71 and is fixed in the inner groove 43, so that the pull rod 7 is rotatably connected to the inner groove 43. One end of the pull rod 7 is inserted into the pulling slot 721, and the other end of the pull rod 7 is provided with a rotating push wheel 73.

[0054] The main shaft 6 is provided with a fixedly connected fourth gear 61 and a sliding fourth push block 63. The fourth gear 61 meshes with the first gear 161. The first motor 16 drives the main shaft 6 to rotate through the first gear 161 and the fourth gear 61. The main shaft 6 is provided with a second guide groove 611. The fourth push block 63 slides along the second guide groove 611. The rear end face of the fourth push block 63 is provided with a rotating ring 62 that is rotatably engaged. The fourth push block 63 is provided with a circumferentially distributed push groove 631. The push wheel 73 slides in the push groove 631. The front end of the push groove 631 is an inclined groove and the rear end is a horizontal groove. When the fourth push block 63 moves forward, the push groove 631 pushes the push wheel 73 to rise. After the push wheel 73 rises, it drives one end of the pull rod 7 to fall, thereby driving the sliding clamp 72 to move and lock.

[0055] The rotating ring 62 has a rotating push ring 621 inside, and the telescopic cover 8 has a slot 81 at the rear end. The extension rods on both sides of the push ring 621 pass through the slot 81. The telescopic end of the third electric cylinder 9 has a fixedly connected mounting block 91. The mounting block 91 is rotatably connected to the extension rods on both sides of the push ring 621. The third electric cylinder 9 pushes the push ring 621 and the telescopic cover 8 to move. When the push ring 621 moves, it drives the rotating ring 62 and the fourth push block 63 to move synchronously, thereby driving the pull rod 7 and the sliding clamp 72 to move.

[0056] This embodiment provides a high-temperature tensile testing method for processing fire-resistant cables, including the following steps:

[0057] The staff puts the section of cable to be tested between the clamping block 232 and the semi-circular needle roller bearing 312. The other end of the cable is inserted into the enlarged receiving port 53, passes through the top plate 52, the front cover 5, and the outer body 4, and stops after extending into the outer body 4. The third electric cylinder 9 pushes the rotating ring 62 and the fourth push block 63 forward. The pull rod 7 rotates and drives the sliding clamping block 72 to clamp the cable.

[0058] When a high-temperature baking test of the cable is required, the second motor 33 drives the second drive shaft 34 and the third push block 313 to rotate. The third push block 313 drives the semi-circular needle roller bearing 312 to clamp the cable in opposite directions. The first motor 16 drives the main shaft 6, the fourth push block 63, the outer body 4, the pull rod 7, and the front cover 5 to rotate. Since the semi-circular needle roller bearing 312 and the cable are in rotational engagement, the cable can rotate synchronously with the main shaft 6. The flame head 142 performs a flame test on the fire resistance of the cable's outer layer. The isolation box 141 prevents the cable's outer layer from dripping from the baking process onto the structure below.

[0059] When a high-temperature baking and tensile test of the cable is required, the above-mentioned high-temperature baking operation is performed first. The flame head 142 can be started and stopped autonomously. The second electric cylinder 26 pushes the fastening block 25 forward, causing the second push block 242, the first drive shaft 24, and the first push block 241 to rotate. The clamping block 232 moves forward to clamp and lock the cable. The semi-circular needle roller bearing 312 retracts and disengages from the cable. Since the clamping block 232 is fixedly engaged with the cable, the first electric cylinder 15 pulls the first bracket 11, the outer body 4, the front cover 5, the main shaft 6, and the pull rod 7 backward, thereby stretching the cable and testing its thermal tensile properties.

[0060] When a high-temperature baking and twisting test of a cable is required, the above-mentioned high-temperature baking operation of the cable is performed first. The flame head 142 can be started and stopped autonomously. The second electric cylinder 26 pushes the fastening block 25 forward, which drives the second push block 242, the first drive shaft 24, and the first push block 241 to rotate. The clamping block 232 moves forward in opposite directions to clamp and lock the cable. The semi-circular needle roller bearing 312 moves backward to disengage from the cable. Since the clamping block 232 is fixedly engaged with the cable, the first motor 16 drives the main shaft 6, the fourth push block 63, the outer body 4, the front cover 5, and the pull rod 7 to rotate, thereby causing the cable to rotate and twist to test the thermal twisting of the cable.

[0061] When a high-temperature baking torsion and tensile test of a cable is required, first perform the high-temperature baking operation described above, and then perform the high-temperature baking tensile test and the high-temperature baking torsion test of the cable simultaneously to test the thermal torsion and tensile condition of the cable.

[0062] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 this invention.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-temperature tensile testing device for processing fire-resistant cables, the high-temperature tensile testing device comprising a machine base (1), characterized in that, The machine base (1) is provided with a tail end fixing component (2), a tail end rotating component (3) and a clamping rotating component above it, and the tail end fixing component (2), the tail end rotating component (3) and the clamping rotating component are arranged in sequence. The tail end fixing component (2) includes a fourth bracket (21), a fifth bracket (22) and a sixth bracket (23), and the sixth bracket (23) is provided with two sets of wire clamping blocks (232) that move in opposite directions. The tail end rotating assembly (3) includes a seventh bracket (31) and an eighth bracket (32). The seventh bracket (31) is provided with two sets of semi-circular needle roller bearings (312) that move in opposite directions. The clamping and rotating assembly includes an outer body (4), a front cover (5), a main shaft (6), a pull rod (7), a telescopic cover (8), and a third electric cylinder (9). The front end of the outer body (4) is provided with a front cover (5), and the rear end of the outer body (4) is provided with a telescopic cover (8) that is rotatably engaged. The main shaft (6), the outer body (4), the front cover (5), and the telescopic cover (8) are concentric. The front end of the main shaft (6) is fixedly connected to the outer body (4). The fourth bracket (21) is provided with a fixedly connected second electric cylinder (26). The fifth bracket (22) and the sixth bracket (23) are rotatably provided with an array of first drive shafts (24). The first drive shaft (24) is provided with a fixedly connected first push block (241) and second push block (242). The sixth bracket (23) is provided with an array of first guide shafts (231). The wire clamping block (232) slides along the first guide shaft (231). When the first push block (241) rotates, it drives the wire clamping block (232) to move. The lower end of the second push block (242) is provided with a rotating wheel (243). The second electric cylinder (26) is provided with a sliding fastening block (25). The second electric cylinder (26) pushes the fastening block (25) forward. The guide block (251) squeezes open the rotating wheel (243) and the second push block (242), thereby driving the first push block (241) to rotate synchronously. The seventh bracket (31) is provided with an array of second guide shafts (311), and the semi-circular needle roller bearings (312) slide along the second guide shafts (311). The seventh bracket (31) and the eighth bracket (32) are provided with an array of second drive shafts (34). The second drive shafts (34) are provided with a fixedly connected second gear (341) and a third push block (313). The third push block (313) has the same structure as the first push block (241). When the third push block (313) rotates, it drives the semi-circular needle roller bearings (312) to move. The second gears (341) mesh with each other. The eighth bracket (32) is provided with a second motor (33) on its side. The shaft of the second motor (33) is provided with a fixedly connected third gear (331). The third gear (331) meshes with the second gear (341). The third gear (331) drives the second gear (341) to rotate in opposite directions. The second gear (341) drives the second drive shaft (34) and the third push block (313) to rotate, thereby driving the semi-circular needle roller bearing (312) to move in opposite directions.

2. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 1, characterized in that, The upper surface of the machine (1) is provided with a sliding first bracket (11) and a fixedly connected high temperature test bracket (14) and a first electric cylinder (15). The telescopic end of the first electric cylinder (15) is fixedly connected to the first bracket (11). The upper end of the first bracket (11) is provided with a fixedly connected second bracket (12) and a third bracket (13). The side of the second bracket (12) is provided with a through first opening (121). The second bracket (12) is provided with a fixedly connected first motor (16). The first gear (161) is fixedly connected on the shaft of the first motor (16). The third bracket (13) is provided with a linear bearing (131). The high temperature test bracket (14) is provided with an isolation box (141). The isolation box (141) is provided with a flame head (142) above it.

3. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 2, characterized in that, The outer body (4) is installed in the linear bearing (131). The second bracket (12) is provided with a fixed connection of a third electric cylinder (9) on both sides. The third electric cylinder (9) pushes the telescopic cover (8) to extend and retract, and the main shaft (6) rotates in the first opening (121).

4. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 3, characterized in that, The outer body (4) is provided with a circumferentially distributed inner groove (43), the front cover (5) is provided with an axially distributed first guide groove (51), the front end of the front cover (5) is provided with a top plate (52), the center of the top plate (52) is provided with an enlarged receiving port (53), the center of the top plate (52), the front cover (5) and the outer body (4) are all provided with a through circular slot, and the top plate (52), the front cover (5) and the outer body (4) are fixedly connected by fasteners.

5. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 4, characterized in that, The first guide groove (51) is provided with a sliding clamp (72) that is slidably engaged. The sliding clamp (72) is provided with a pull slot (721). The inner groove (43) is provided with a rotating pull rod (7). One end of the pull rod (7) is inserted into the pull slot (721), and the other end of the pull rod (7) is provided with a rotating push wheel (73).

6. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 5, characterized in that, The main shaft (6) is provided with a fixedly connected fourth gear (61) and a sliding fourth push block (63). The fourth gear (61) meshes with the first gear (161). The main shaft (6) is provided with a second guide groove (611). The fourth push block (63) slides along the second guide groove (611). The rear end face of the fourth push block (63) is provided with a rotating ring (62) that is rotatably engaged. The fourth push block (63) is provided with a circumferentially distributed push groove (631). The push wheel (73) slides in the push groove (631).

7. The high-temperature tensile testing equipment for processing fire-resistant cables according to claim 6, characterized in that, The rotating ring (62) is provided with a rotating push ring (621), and the telescopic cover (8) is provided with a slot (81) at the rear end. The extension rods on both sides of the push ring (621) pass through the slot (81). The telescopic end of the third electric cylinder (9) is provided with a fixedly connected mounting block (91). The mounting block (91) is rotatably connected to the extension rods on both sides of the push ring (621).

8. A method for high-temperature tensile testing of fire-resistant cables based on the high-temperature tensile testing equipment for fire-resistant cable processing as described in claim 7, characterized in that, Includes the following steps: Place the section of cable to be tested between the clamping block (232) and the semi-circular needle roller bearing (312). Insert the other end of the cable into the enlarged receiving port (53), pass through the top plate (52), the front cover (5), and the outer body (4), and stop after extending into the outer body (4). The third electric cylinder (9) pushes the rotating ring (62) and the fourth push block (63) forward. The pull rod (7) rotates and drives the sliding clamping block (72) to clamp the cable. When a high-temperature baking test of the cable is required, the second motor (33) drives the second drive shaft (34) and the third push block (313) to rotate. The third push block (313) drives the semi-circular needle roller bearing (312) to clamp the cable in opposite directions. The first motor (16) drives the main shaft (6), the fourth push block (63), the outer body (4), the pull rod (7), and the front cover (5) to rotate. The flame head (142) performs a flame test on the fire resistance of the outer layer of the cable. When a high-temperature baking and tensile test of a cable is required, the above-mentioned high-temperature baking operation of the cable is performed first. The flame head (142) can be started and stopped autonomously. The second electric cylinder (26) pushes the fastening block (25) forward, driving the second push block (242), the first drive shaft (24), and the first push block (241) to rotate. The clamping block (232) moves forward to clamp and lock the cable. The semi-circular needle roller bearing (312) moves backward to disengage from the cable. The first electric cylinder (15) pulls the first bracket (11), the outer body (4), the front cover (5), the main shaft (6), and the pull rod (7) backward, thereby stretching the cable and testing the thermal tensile condition of the cable. When a high-temperature baking and twisting test of a cable is required, the above-mentioned high-temperature baking operation of the cable is performed first. The flame head (142) can be started and stopped independently. The second electric cylinder (26) pushes the fastening block (25) forward, which drives the second push block (242), the first drive shaft (24), and the first push block (241) to rotate. The clamping block (232) moves forward to clamp and lock the cable. The semi-circular needle roller bearing (312) moves backward to disengage from the cable. The first motor (16) drives the main shaft (6), the fourth push block (63), the outer body (4), the front cover (5), and the pull rod (7) to rotate, thereby driving the cable to rotate and twist, and testing the thermal twisting of the cable. When a high-temperature baking torsion and tensile test of a cable is required, first perform the high-temperature baking operation described above, and then perform the high-temperature baking tensile test and the high-temperature baking torsion test of the cable simultaneously to test the thermal torsion and tensile condition of the cable.

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