Tension testing device for multi-strand steel wire rope for hoisting
By using a wedge-shaped oblique movement and a screw groove embedded in a rubber buffer structure, combined with the linkage between the protective mechanism and the fixing mechanism, the problems of unreliable clamping and poor adaptability of the multi-strand steel wire rope tension testing device for lifting are solved, achieving accurate testing and safety protection, and adapting to steel wire ropes of different diameters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-31
- Publication Date
- 2026-04-14
AI Technical Summary
Existing tensile testing devices for multi-strand steel wire ropes used in lifting have problems such as unreliable clamping leading to easy slippage of the steel wire rope under high tension, distorted test data, lack of effective protection, poor adaptability, and difficulty in compatibility with multi-strand steel wire ropes of different diameters.
It adopts a wedge block oblique movement + screw groove embedding + rubber buffer structure, combined with the linkage of the protective mechanism and the fixing mechanism. The wedge block oblique movement increases the clamping force, the rubber pad buffers the pressure, the clamp block design is adapted to steel wire ropes of different diameters, and the net cover automatically rotates and closes after the test to provide full protection.
It ensures accurate test data, protects wire ropes from damage, improves testing efficiency, is compatible with multi-strand wire ropes of different diameters, avoids wire breakage and injury, significantly improves clamping strength, and is suitable for commonly used lifting equipment.
Smart Images
Figure CN121856027A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wire rope testing technology, and in particular to a tensile testing device for multi-strand wire ropes used in lifting. Background Technology
[0002] Multi-strand steel wire ropes for lifting are core load-bearing components of equipment such as tower cranes and cranes. Their tensile strength is directly related to the safety of lifting operations and must be accurately tested using professional equipment.
[0003] However, in practical applications, there are still some unresolved problems. The following are some common problems of multi-strand wire rope tension testing devices for lifting: First, the clamping is unreliable. Under high tension, the wire rope is prone to slippage, which leads to distorted test data and may damage the strands. Second, there is a lack of protection. If the wire rope breaks during testing, the scattered wires can easily injure the operators, posing a significant safety hazard. Third, the adaptability is poor, making it difficult to be compatible with multi-strand wire ropes of different diameters, resulting in insufficient versatility. Summary of the Invention
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.
[0005] In view of the problems existing in the above and / or existing multi-strand wire rope tensile testing devices for lifting, the present invention is proposed.
[0006] Therefore, the problem to be solved by this invention is how to solve the problems of wire rope slippage under high tension, lack of effective protection during testing, and poor adaptability.
[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lifting multi-strand wire rope tension testing device, comprising: a testing mechanism for testing the tension of a multi-strand wire rope; a fixing mechanism, mounted on the testing mechanism, of which there are two, for fixing the two ends of the multi-strand wire rope during the tension test, including a ring plate fixed on the testing mechanism, a base fixed on the ring plate, the base having inclined grooves arranged in a circular array, and a wedge block sliding in the inclined groove, a clamping block fixed on the wedge block for fixing the two ends of the multi-strand wire rope; a transmission component mounted on the testing mechanism, the ring plate, and the wedge block, and the transmission component cooperating with the wedge block to realize the fixing and unlocking of the two ends of the multi-strand wire rope by the clamping block; and a protective mechanism, mounted on the testing mechanism for protecting the multi-strand wire rope during the tension test, including a first net fixed on the testing mechanism and a second net rotating on the testing mechanism, a triggering component mounted on the testing mechanism, the transmission component, and the second net, and the triggering component cooperating with the second net and the transmission component respectively.
[0008] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the testing mechanism includes a platform placed on the ground, a guide rod fixed to the top of the platform, a support plate fixed to the upper end of the guide rod, a hydraulic cylinder fixed to the support plate, a tension gauge installed at the lower end of the hydraulic cylinder, a circular plate slidably sleeved on the surface of the guide rod, a connecting plate installed at the lower end of the tension gauge, and the connecting plate and the circular plate being fixedly connected by a support column, and fixed columns arranged in a circular array fixed to the top of the platform and the bottom of the circular plate, and two fixing mechanisms respectively installed at the bottom of the circular plate and the top of the platform, and fixed to the fixing columns, and a ring plate fixed to one end of the fixing columns.
[0009] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the base is provided with guide grooves distributed in a circumferential array, and the guide grooves are connected to the inclined grooves. A guide block is fixed on the surface of the wedge block, and the guide block slides in the guide groove.
[0010] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, wherein: a screw groove is provided on the side of the clamping block away from the wedge block, and a rubber pad is provided on the side of the clamping block away from the wedge block.
[0011] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the transmission component includes a vertical rod fixed between the ring plate and the platform and between the ring plate and the circular plate. A movable plate is slidably sleeved on the surface of the vertical rod. A square block is slidably distributed in a circumferential array on the movable plate. A spring is fixed between the surface of the wedge block and the surface of the square block. A connecting rod slides on the square block, and one end of the connecting rod is fixed to the surface of the wedge block. A stop ring is fixedly sleeved on the surface of the connecting rod, and the stop ring cooperates with the square block.
[0012] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the top of the platform and the bottom of the circular plate are both rotatably equipped with rotating frames, the movable plate is fixed with ring blocks arranged in a circumferential array, the rotating frames are provided with grooves arranged in a circumferential array and the grooves cooperate with the ring blocks, the rotating frames are fixed with limiting blocks arranged in a circumferential array, the ring blocks are provided with limiting grooves and the limiting blocks cooperate with the limiting grooves.
[0013] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, wherein: a roller rotates on the block, a square groove is provided on the movable plate to cooperate with the roller, and the roller slides in the square groove, a stop block is fixed at the end of the connecting rod away from the wedge, and a second spring is sleeved on the surface of the vertical rod, and the two ends of the second spring are respectively fixed to the surface of the circular plate and the surface of the movable plate.
[0014] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the triggering element includes a spline rod rotating on a platform and a support plate. A worm gear is fixed at the lower end of the spline rod. A worm rotates on the platform and meshes with the worm gear. Fixed blocks are fixed at the top of the platform and the bottom of the circular plate, and a rotating rod rotates on the fixed blocks. A bevel gear one and a bevel gear two are fixed at both ends of the rotating rod, respectively. A bevel gear ring is fixedly sleeved on the outer surface of the rotating frame and meshes with the bevel gear two. A spline sleeve rotates on the circular plate and slides on the surface of the spline rod. A bevel gear three is fixedly sleeved on the lower surface of the spline rod and meshes with the bevel gear one below. A bevel gear four is fixedly sleeved on the surface of the spline sleeve and meshes with the bevel gear one above.
[0015] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the support plate has a short rod that rotates, and a first spur gear and a second spur gear are respectively fixedly sleeved on the surface of the short rod. A circular gear ring is fixed on the inner wall of the second mesh cover, and the second spur gear meshes with the circular gear ring. A third spur gear rotates on the upper surface of the spline rod, and a groove is opened inside the third spur gear. A driving block is fixed on the inner wall of the groove. A pushing block is fixed on the upper surface of the spline rod, and the pushing block cooperates with the driving block.
[0016] As a preferred embodiment of the lifting multi-strand steel wire rope tension testing device of the present invention, the protective mechanism further includes a driving component mounted on the worm gear and the platform. The driving component includes a mounting column fixed on the platform. A fixing plate is fixed to one end of the mounting column, and a rotating column is rotatably mounted on the fixing plate. A docking block is fixed to one end of the rotating column. A docking groove is opened at one end of the spline rod, and the docking block cooperates with the docking groove. A permanent magnet is fixed to one end surface of the rotating column. A spring is sleeved on the surface of the rotating column, and one end of the spring is fixed to the surface of the permanent magnet. The other end is rotatably connected to the fixing plate through a bearing. An electromagnet is fixed to the surface of the fixing plate, and the electromagnet cooperates with the permanent magnet.
[0017] The beneficial effects of this invention are as follows: 1. By adopting the structure of "wedge block oblique movement + screw groove embedding + rubber buffer", the greater the tension, the stronger the clamping force, avoiding slippage under high tension. The screw groove embedding increases the friction between the rope strands, and the rubber pad buffers the pressure to prevent damage to the rope strands. This ensures accurate test data and protects the wire rope for normal use in the future. It is compatible with the specifications of wire ropes for commonly used lifting equipment.
[0018] 2. Through the linkage of the protective mechanism and the fixing mechanism, the second net cover automatically rotates and closes after clamping, forming a full-enclosed protection with the first net cover, preventing broken steel wire from injuring people. The open design of the net cover does not affect observation, solving the safety pain point of the lack of protection in traditional devices. The steel wire rope clamping and net cover closing can be completed simultaneously by handwheel drive. After testing, the reverse operation is used to unlock and open, without the need for step-by-step manual adjustment, greatly improving efficiency. The arc design of the clamping block is universally compatible with the screw groove, and is compatible with multi-strand steel wire ropes of different diameters, without the need to replace special clamps. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A scene illustration of a multi-strand steel wire rope tension testing device used for lifting.
[0021] Figure 2 A partial sectional plan view of a multi-strand steel wire rope tension testing device for lifting.
[0022] Figure 3 Partial sectional three-dimensional view of a multi-strand steel wire rope tension testing device for lifting. Figure 1 .
[0023] Figure 4 Partial sectional three-dimensional view of a multi-strand steel wire rope tension testing device for lifting. Figure 2 .
[0024] Figure 5 Partial sectional three-dimensional view of a multi-strand steel wire rope tension testing device for lifting. Figure 3 .
[0025] Figure 6 Partial sectional perspective view of the ring block and conical tooth ring of the multi-strand steel wire rope tension testing device for lifting.
[0026] Figure 7 Partial sectional perspective view of the rotating column and fixing plate of the multi-strand steel wire rope tension testing device for lifting.
[0027] In the diagram: 1. Testing mechanism; 11. Platform; 12. Guide rod; 13. Support plate; 14. Hydraulic cylinder; 15. Tensile gauge; 16. Circular plate; 17. Connecting plate; 18. Fixing column; 2. Fixing mechanism; 21. Base; 22. Inclined groove; 23. Wedge; 24. Clamping block; 25. Ring plate; 26. Transmission component; 3. Protective mechanism; 31. Net cover one; 32. Net cover two; 33. Trigger; 34. Drive component 35. Ball bearing; 36. Limiting ring; 37. Positioning rod; 38. Limiting hole; 39. Insertion hole; 231. Guide groove; 221. Guide block; 241. Screw groove; 242. Rubber pad; 261. Vertical rod; 262. Movable plate; 263. Block; 264. Spring 1; 265. Connecting rod; 266. Abutment ring; 267. Rotating frame; 268. Ring block; 269. Groove; 2610. Limiting block; 261 1. Limiting groove; 2612. Roller; 2613. Abutment block; 2614. Spring 2; 2615. Square groove; 331. Spline rod; 332. Worm gear; 333. Worm; 334. Fixing block; 335. Rotating rod; 336. Bevel gear 1; 337. Bevel gear 2; 338. Bevel gear ring; 339. Spline sleeve; 3310. Bevel gear 3; 3311. Bevel gear 4; 3312. Short rod; 331 3. Circular Gear 1; 3314. Circular Gear 2; 3315. Circular Gear Ring; 3316. Circular Gear 3; 3317. Groove; 3318. Drive Block; 3319. Push Block; 341. Mounting Column; 342. Fixing Plate; 343. Rotating Column; 344. Connecting Block; 345. Connecting Groove; 346. Permanent Magnet; 347. Spring 3; 348. Electromagnet; 349. Handwheel; 3410. Anti-detachment Ring. Detailed Implementation
[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.
[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.
[0031] Example 1, referring to Figure 1 and Figure 2This is the first embodiment of the present invention. This embodiment provides a tensile testing device for multi-strand steel wire ropes used for lifting. The tensile testing device for multi-strand steel wire ropes used for lifting includes a testing mechanism 1, a fixing mechanism 2, and a protective mechanism 3.
[0032] Specifically, testing mechanism 1 is used to test the tensile strength of multi-strand steel wire rope. Testing mechanism 1 is existing technology, and the working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.
[0033] Specifically, the fixing mechanism 2 is installed on the testing mechanism 1, and there are two of them. It is used to fix the two ends of the multi-strand steel wire rope during the tensile test. It includes a ring plate 25 fixed on the testing mechanism 1, a base 21 fixed on the ring plate 25, and inclined grooves 22 distributed in a circular array on the base 21. A wedge block 23 slides in the inclined groove 22, and a clamping block 24 is fixed on the wedge block 23 for fixing the two ends of the multi-strand steel wire rope.
[0034] There are two ring plates 25 and two bases 21. Each base 21 has multiple inclined grooves 22. The number of wedges 23 is the same as the number of inclined grooves 22. With the setting of inclined grooves 22 and wedges 23, after the wire rope is put in, the pre-tightened spring pushes the movable wedges 23 to move so that the clamping block 24 initially clamps it. During the test, the greater the tension, the deeper the movable wedges 23 are squeezed into the wedge-shaped inclined grooves 22, and the clamping force is amplified simultaneously (the maximum clamping force can reach 1000kN). This completely avoids the wire rope slipping under high tension. The wedge-tight self-locking structure ensures that there is no slippage under high tension. It covers the specifications of wire ropes for commonly used lifting equipment such as tower cranes and cranes.
[0035] The testing mechanism 1, the ring plate 25, and the wedge block 23 are equipped with a transmission component 26, which cooperates with the wedge block 23 to fix and unlock the two ends of the multi-strand steel wire rope by the clamping block 24. Through the setting of the transmission component 26, after the steel wire rope is put in, its operation can quickly drive the wedge block 23 to move, so that the clamping block 24 clamps and fixes the steel wire rope. After the test is completed, it runs in reverse, so that the movable wedge block 23 is released under the action of the return spring, releasing the fixation of the steel wire rope. The operation is convenient.
[0036] Specifically, the protective mechanism 3, installed on the testing mechanism 1, is used for protection during the tensile test of multi-strand steel wire rope. It includes a first mesh cover 31 fixed on the testing mechanism 1 and a second mesh cover 32 rotating on the testing mechanism 1. With the setting of the first mesh cover 31 and the second mesh cover 32, after clamping and fixing both ends of the steel wire rope before the test, the second mesh cover 32 can be rotated by the action of the trigger 33 to cover the exposed part of the first mesh cover 31, thus covering the steel wire rope during the test, protecting the operator, and preventing the multi-strand steel wire rope from breaking and scattering into multiple strands of steel wire that sweep in all directions and injure the user during the tensile test. At the same time, the mesh does not affect the user's observation during the test.
[0037] Triggering elements 33 are installed on the testing mechanism 1, the transmission component 26, and the second mesh cover 32. The triggering elements 33 cooperate with the second mesh cover 32 and the transmission component 26 respectively. Through the setting of the triggering elements 33, during the test of the wire rope, the transmission component 26 is first driven to make the wedge block 23 act on the clamping block 24 to clamp and fix the wire rope. Then, the operation continues to make the second mesh cover 32 rotate. With the cooperation of the first mesh cover 31, the test process is blocked. After the test is completed, the second mesh cover 32 and the first mesh cover 31 are opened first, and then the wire rope after the test is released from fixation.
[0038] Example 2, refer to Figures 2-6 This is the second embodiment of the present invention, which is based on the previous embodiment.
[0039] Specifically, the testing mechanism 1 includes a platform 11 placed on the ground. A guide rod 12 is fixed to the top of the platform 11, and a support plate 13 is fixed to the upper end of the guide rod 12. There are four guide rods 12, which are symmetrically distributed to support the support plate 13. A hydraulic cylinder 14 is fixed on the support plate 13. A tension gauge 15 is installed at the lower end of the hydraulic cylinder 14. A circular plate 16 is slidably sleeved on the surface of the guide rod 12. A connecting plate 17 is installed at the lower end of the tension gauge 15, and the connecting plate 17 and the circular plate 16 are fixedly connected by a support column. Fixed columns 18 arranged in a circular array are fixed to the top of the platform 11 and the bottom of the circular plate 16. Two fixing mechanisms 2 are respectively installed at the bottom of the circular plate 16 and the top of the platform 11, and fixed to the fixed columns 18. A ring plate 25 is fixed to one end of the fixed column 18.
[0040] Hydraulic cylinder 14 passes through support plate 13 and is fixedly connected by bolts. Tension gauge 15 is existing technology. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here. Guide rod 12 passes through circular plate 16 and is slidably connected to it. There are several pillars, which are distributed in a circumferential array. The pillars fix the connection between connecting plate 17 and circular plate 16. When hydraulic cylinder 14 retracts, it drives tension gauge 15 to pull connecting plate 17 and circular plate 16 upward, thereby driving the upper fixing mechanism 2 to move upward and perform tensile testing on the wire rope. The setting of fixing column 18 can support and fix ring plate 25, providing support and fixation for the overall installation of fixing mechanism 2.
[0041] Specifically, the base 21 has guide grooves 231 arranged in a circular array, and the guide grooves 231 are connected to the inclined grooves 22. The wedge block 23 has a guide block 221 fixed on its surface, and the guide block 221 slides in the guide grooves 231. The wedge block 23 is guided and limited by the guide grooves 231 and the guide block 221, so that the wedge block 23 will not detach from the base 21 when it moves in the inclined grooves 22 on the base 21. The inclined grooves 22 connected to the guide grooves 231 are parallel to each other and do not affect normal movement.
[0042] Specifically, a screw groove 241 is provided on the side of the clamping block 24 away from the wedge block 23, and a rubber pad 242 is provided on the side of the clamping block 24 away from the wedge block 23. The side of the clamping block 24 that is in fixed contact with the wire rope is arc-shaped. Multiple screw grooves 241 are provided on one side of the arc surface of the clamping block 24. Through this design, the arc-shaped screw grooves 241 are embedded into the gaps between the wire rope strands, increasing the contact friction. The rubber pad 242 is provided on the side of the clamping block 24 that is in fixed contact with the wire rope to buffer the rigid pressure and prevent the wire rope from being pinched or crushed. Through the cooperative structure of the wedge-type movable wedge block 23, screw groove 241 and rubber pad 242, adaptive anti-slip clamping of multi-diameter multi-strand wire ropes is achieved, solving the problems of slippage and strand damage under high tension.
[0043] Specifically, the transmission component 26 includes a vertical rod 261 fixed between the ring plate 25 and the platform 11 and between the ring plate 25 and the circular plate 16. A movable plate 262 is slidably sleeved on the surface of the vertical rod 261. A square block 263 arranged in a circular array slides on the movable plate 262. A spring 264 is fixed between the surface of the wedge block 23 and the surface of the square block 263. A connecting rod 265 slides on the square block 263, and one end of the connecting rod 265 is fixed to the surface of the wedge block 23. A retaining ring 266 is fixedly sleeved on the surface of the connecting rod 265, and the retaining ring 266 cooperates with the square block 263.
[0044] There are several vertical rods 261. The movable plate 262 has square holes arranged in a circular array to cooperate with the movement of multiple square blocks 263. With the setting of spring 264, when the movable plate 262 moves on the vertical rods 261 and drives the square blocks 263 to move towards the base 21, the spring 264 is compressed and deformed, generating elastic force to wedge 23, so that the wedge 23 moves obliquely in the inclined groove 22 on the base 21, thereby causing multiple clamping blocks 24 to move obliquely closer to each other, so as to contact one end of the wire rope passing through the base 21. By pushing the movable wedge 23, the clamping blocks 24 initially clamp the wire rope.
[0045] The connecting rod 265 passes through the block 263 and slides with it. The connecting rod 265 synchronizes the lateral movement direction and position of the wedge block 23 and the block 263, while the longitudinal movement direction of the wedge block 23 is not affected. The connecting rod 265 can move on the block 263, so that the spring 264 can maintain a stable connection with the wedge block 23 and the block 263. At the same time, it prevents the spring 264 from bending when it deforms, which would affect the movement of the wedge block 23 when the block 263 moves.
[0046] With the setting of the abutment ring 266, when the block 263 moves towards the base 21 along with the movable plate 262, the spring 264 pushes the wedge block 23 to move, and the connecting rod 265 moves on the block 263, so that the clamping block 24 initially clamps the wire rope. As the block 263 continues to approach the base 21, the spring 264 continues to compress but hardly pushes the clamping block 24 to move anymore. At this time, the abutment block 2613 contacts the block 263. As the block 263 approaches the base 21, it can push the connecting rod 265 to move, thereby moving the wedge block 23, so that the clamping block 24 clamps the wire rope again. At the same time, the block 263 moves in the square hole.
[0047] Specifically, there are two rotating frames 267 on the top of the platform 11 and the bottom of the circular plate 16, which are rotatably connected to the platform 11 and the circular plate 16 respectively through bearings. The movable plate 262 is fixed with ring blocks 268 arranged in a circumferential array. The rotating frames 267 are provided with grooves 269 arranged in a circumferential array, and the grooves 269 cooperate with the ring blocks 268. The rotating frames 267 are fixed with limiting blocks 2610 arranged in a circumferential array. The ring blocks 268 are provided with limiting grooves 2611, and the limiting blocks 2610 cooperate with the limiting grooves 2611.
[0048] One side of the ring block 268 is chamfered, and the inner wall of the groove 269 is also chamfered. The two chamfers are matched. With this setting, when the rotating frame 267 is rotated, the ring block 268 can continuously move out of the groove 269 under the pressure of the chamfered surface. This causes the movable plate 262 to move on the vertical rod 261, pushing the movable plate 262 towards the base 21, thereby moving the wedge block 23. The limiting block 2610 and the limiting groove 2611 are both arc-shaped. With the setting of the limiting block 2610 and the limiting groove 2611, after the ring block 268 moves out of the groove 269 on the rotating frame 267, the rotating frame 267 continues to rotate. When the limiting block 2610 on the rotating frame 267 rotates into the limiting groove 2611 on the ring block 268, it can no longer rotate. The operation is stopped, and the tensile test can be performed.
[0049] Specifically, a roller 2612 rotates on the block 263, and a square groove 2615 is provided on the movable plate 262 to cooperate with the roller 2612. The roller 2612 slides in the square groove 2615. The roller 2612 is rotatably connected to the block 263 through a bearing. Four rollers 2612 are provided on one block 263. The rollers 2612 and the square groove 2615 guide and limit the block 263, so that the block 263 moves stably in the square hole on the movable plate 262, while reducing the resistance during movement. A stop block 2613 is fixed to the end of the connecting rod 265 away from the wedge block 23. A spring 2614 is sleeved on the surface of the vertical rod 261, and the two ends of the spring 2614 are fixed to the surface of the circular plate 16 and the surface of the movable plate 262, respectively.
[0050] With the setting of the abutment block 2613, after the test is completed, when the movable plate 262 is reset, it drives the square block 263 to move back. After the square block 263 moves on the connecting rod 265 and contacts the abutment block 2613, it can move the square block 263 to drive the connecting rod 265 and the wedge block 23 to reset. At the same time, the square block 263 moves in the square hole on the movable plate 262. The number of springs 2614 is the same as the number of vertical rods 261. With the setting of springs 2614, when the rotating frame 267 is rotated to move the movable plate 262 towards the base 21, the springs 2614 are compressed. When the rotating frame 267 rotates and the ring block 268 gradually aligns with the groove 269, under the action of its elastic force, the movable plate 262 moves away from the base 21, resets the movable plate 262, and places the ring block 268 in the groove 269.
[0051] Example 3, referring to Figures 1 to 7 This is the third embodiment of the present invention, which is based on the first two embodiments.
[0052] Specifically, the trigger element 33 includes a splined rod 331 that rotates on the platform 11 and the support plate 13. A worm gear 332 is fixed to the lower end of the splined rod 331. A worm 333 rotates on the platform 11 and meshes with the worm gear 332. The splined rod 331 is rotatably connected to the platform 11 and the support plate 13 through bearings, and the worm 333 is rotatably connected to the platform 11 through bearings. Through the arrangement of the worm 333 and the worm gear 332, they can play a role in transmission and self-locking. Only by rotating the worm 333 can the worm gear 332 be rotated, thereby causing the splined rod 331 to rotate. Fixing blocks are fixed to the top of the platform 11 and the bottom of the circular plate 16. 334, and a rotating rod 335 is rotatably mounted on the fixed block 334. Bevel gear 1 336 and bevel gear 2 337 are fixed at both ends of the rotating rod 335 respectively. A bevel gear ring 338 is fixedly sleeved on the outer surface of the rotating frame 267, and the bevel gear ring 338 meshes with bevel gear 2 337. A spline sleeve 339 is rotatably mounted on the circular plate 16, and the spline sleeve 339 is slidably sleeved on the surface of the spline rod 331. A bevel gear 3310 is fixedly sleeved on the lower end surface of the spline rod 331, and the bevel gear 3310 meshes with the bevel gear 1 336 below. A bevel gear 4 3311 is fixedly sleeved on the surface of the spline sleeve 339, and the bevel gear 4 3311 meshes with the bevel gear 1 336 above.
[0053] The rotating rod 335 is rotatably connected to the fixed block 334 via a bearing, and the spline sleeve 339 is rotatably connected to the circular plate 16 via a bearing. The spline sleeve 339 is designed so that the rotation of the spline rod 331 drives the spline sleeve 339 to rotate, thereby causing the fourth bevel gear 3311 to rotate. Simultaneously, the movement of the circular plate 16 does not affect the movement of the spline sleeve 339 on the spline rod 331. The third bevel gear 3310 has the same specifications as the fourth bevel gear 3311. Then, the two wire ropes... After the end is inserted into the two bases 21, the worm gear 333 is rotated to make the worm wheel 332 rotate, which in turn makes the spline rod 331 and spline sleeve 339 rotate, thereby making the bevel gear 3310 and bevel gear 4 3311 rotate. Under the transmission of bevel gear 1 336 and bevel gear 2 337, the bevel gear ring 338 and the rotating frame 267 rotate, thereby making the movable plate 262 move towards the base 21, and then the clamping block 24 clamps the wire rope passing through the base 21.
[0054] Specifically, a short rod 3312 rotates on the support plate 13. The short rod 3312 is rotatably connected to the support plate 13 via a bearing. A first spur gear 3313 and a second spur gear 3314 are fixedly fitted on the surface of the short rod 3312. A circular gear ring 3315 is fixed on the inner wall of the second mesh cover 32, and the second spur gear 3314 meshes with the circular gear ring 3315. A third spur gear 3316 rotates on the upper surface of the spline rod 331, and a groove 3317 is opened in the third spur gear 3316. Through the setting of the first spur gear 3313, when the third spur gear 3316 rotates once, the first spur gear 3313 can rotate multiple times, which in turn causes the second spur gear 3314 to rotate multiple times, thereby driving the circular gear ring 3315 to rotate significantly, so that the second mesh cover 32 rotates significantly and closes on the first mesh cover 31, which plays a protective role during tensile testing. The third spur gear 3316 is rotatably connected to the spline rod 331 via a bearing.
[0055] A drive block 3318 is fixed to the inner wall of the groove 3317, and a push block 3319 is fixed to the upper surface of the spline rod 331. The push block 3319 cooperates with the drive block 3318. Through the arrangement of the groove 3317 and the drive block 3318, after the two ends of the wire rope are inserted into the base 21, rotating the spline rod 331 causes the push block 3319 to rotate inside the groove 3317 without contacting the drive block 3318. During this process, the spline rod 331, under the transmission of the bevel gear, causes the bevel gear ring 338 and the rotating frame 267 to move. The rotation causes the movable plate 262 to move, allowing the clamping block 24 to clamp the wire rope. After clamping, the rotation of the spline rod 331 causes the push block 3319 to contact the drive block 3318, which in turn drives the rotation of the third spur gear 3316. Under the transmission of the first spur gear 3313 and the second spur gear 3314, the spur gear ring 3315 and the second mesh cover 32 rotate and close, until the limit block 2610 rotates into the limit groove 2611 on the ring block 268 and abuts against it, and can no longer rotate, thus completing the closure.
[0056] Specifically, the protective mechanism 3 also includes a drive component 34 mounted on the worm gear 333 and the platform 11. The drive component 34 includes two mounting posts 341 fixed to the platform 11. One end of each mounting post 341 is fixed to a fixing plate 342, and a rotating post 343 rotates on the fixing plate 342. The rotating post 343 passes through the fixing plate 342 and is slidably connected to it. One end of the rotating post 343 is fixed to a docking block 344. One end of the splined rod 331 has a docking groove 345, and the docking block 344 and the docking groove 345 are connected. The mating block 344 is chamfered at one end to facilitate its insertion into the mating groove 345 when it is mated with the mating groove 345. A permanent magnet 346 is fixed on one end of the rotating column 343, and a spring 347 is sleeved on the surface of the rotating column 343. One end of the spring 347 is fixed to the surface of the permanent magnet 346, and the other end is rotatably connected to the fixing plate 342 through a bearing. An electromagnet 348 is fixed on the surface of the fixing plate 342, and the electromagnet 348 cooperates with the permanent magnet 346.
[0057] Electromagnet 348 is connected to the test device circuit via wires and a relay, which is existing technology and readily understood by those skilled in the art, so it will not be elaborated here. Through the setting of spring 347, when no power is applied and hydraulic cylinder 14 is not running for tensile testing, the spring 347 causes the mating block 344 to stably insert into the mating groove 345 on the worm 333. Then, rotating the handwheel 349, rotating column 343, permanent magnet 346, spring 347, and mating block 344 causes the worm 333 to rotate, thereby achieving… After the wire rope is clamped and the mesh cover 32 is rotated and closed, the hydraulic cylinder 14 is energized, and the electromagnet 348 is energized to generate a repulsive force on the permanent magnet 346, thereby pushing the permanent magnet 346 and the rotating column 343 to move, and the spring 347 is stretched to disengage the docking block 344 from the docking groove 345. This is to prevent the handwheel 349 from being manually operated to open the mesh cover 32 during the tensile test, which would be dangerous. The handwheel 349 can only be turned to open the mesh cover 32 after the test is completed and the hydraulic cylinder 14 and the electromagnet 348 are de-energized.
[0058] A handwheel 349 is fixed to the end of the rotating column 343 away from the docking block 344. An anti-detachment ring 3410 is fixedly sleeved on the surface of the end of the rotating column 343 close to the docking block 344. The anti-detachment ring 3410 cooperates with the fixing plate 342. The anti-detachment ring 3410 prevents the rotating column 343 from moving excessively off the fixing plate 342 when the electromagnet 348 acts on the permanent magnet 346 to move the rotating column 343.
[0059] The top and bottom of the second mesh cover 32 are both embedded with ball bearings 35. The inner wall of the second mesh cover 32 is fixed with a limiting ring 36. The top of the circular plate 16 is fixed with a positioning rod 37. The limiting ring 36 has a limiting hole 38. The support plate 13 has an insertion hole 39. The positioning rod 37 is respectively matched with the limiting hole 38 and the insertion hole 39.
[0060] There are several ball bearings 35, which are rotatably connected to the second mesh cover 32. The bottom of the support plate 13 and the top of the platform 11 are both provided with annular grooves to cooperate with the rotation of the second mesh cover 32. The ball bearings 35 reduce the resistance encountered by the second mesh cover 32 when it rotates. There are several limiting holes 38. Through the setting of the limiting holes 38 and the insertion holes 39, during the test, the hydraulic cylinder 14 pulls the circular plate 16 and the positioning rod 37 on it upward, inserting the positioning rod 37 into the corresponding limiting hole 38 on the limiting ring 36, which plays a role in limiting the second mesh cover 32 and preventing it from opening. At the same time, as it moves upward, the positioning rod 37 is inserted into the insertion hole 39, which plays a role in limiting the positioning rod 37. After the test is completed, when the hydraulic cylinder 14 extends and resets, the positioning rod 37 disengages from the insertion hole 39 and the limiting hole 38, and the second mesh cover 32 can be opened. At the same time, the wire rope is not in a taut state, which is safer.
[0061] In use, first, the two ends of the multi-strand steel wire rope are passed through the two bases 21. The drive unit 34 is started, and the handwheel 349 drives the rotating column 343 to rotate. The worm gear 333 and worm wheel 332 drive the spline rod 331 to rotate, which in turn drives the rotating frame 267 to rotate via bevel gear transmission. The rotating frame 267 pushes the movable plate 262 to move along the vertical rod 261 towards the base 21 through the chamfered fit between the groove 269 and the ring block 268. The movable plate 262 drives the wedge block 23 to move obliquely along the inclined groove 22 through the spring 264. Multiple clamping blocks 24 approach each other, the screw groove 241 is embedded in the gap between the steel wire rope strands, and the rubber pad 242 buffers the pressure, initially clamping the steel wire rope.
[0062] At the same time, after the spline rod 331 rotates to the preset angle, the push block 3319 contacts the drive block 3318, and the mesh cover 32 rotates through the gear transmission, closing with the mesh cover 31 to form a full-enclosed protection to prevent the wire rope from breaking and injuring people.
[0063] During testing, the hydraulic cylinder 14 retracts, pulling the force gauge 15 and the circular plate 16 upward, applying tension to the wire rope. The greater the tension, the deeper the wedge block 23 is squeezed into the inclined groove 22, and the clamping force is amplified simultaneously, achieving self-locking and anti-slip.
[0064] After the test is completed, the electromagnet 348 is de-energized. After the docking block 344 is inserted into the docking groove 345, the handwheel 349 is rotated in the opposite direction, the rotating frame 267 rotates, the movable plate 262 is reset under the action of the second spring 2614, the wedge block 23 and the clamping block 24 are unlocked to fix the wire rope, the second mesh cover 32 opens simultaneously, and the wire rope can be taken out.
[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A tensile testing device for multi-strand steel wire ropes used in lifting, characterized in that: include, Testing facility (1) is used for tensile testing of multi-strand steel wire rope; A fixing mechanism (2), installed on the testing mechanism (1), and there are two of them, is used to fix the two ends of the multi-strand steel wire rope during the tensile test. It includes a ring plate (25) fixed on the testing mechanism (1), a base (21) fixed on the ring plate (25), and a series of inclined grooves (22) arranged in a circular array on the base (21). A wedge (23) slides in the inclined groove (22), and a clamp (24) is fixed on the wedge (23) for fixing the two ends of the multi-strand steel wire rope. A transmission component (26) is installed on the testing mechanism (1), the ring plate (25) and the wedge (23), and the transmission component (26) cooperates with the wedge (23) to realize the fixing and unlocking of the two ends of the multi-strand steel wire rope by the clamp (24); and, The protective mechanism (3) is installed on the testing mechanism (1) and is used for protection during the tensile test of multi-strand steel wire rope. It includes a first net cover (31) fixed on the testing mechanism (1) and a second net cover (32) rotating on the testing mechanism (1). The testing mechanism (1), the transmission component (26) and the second net cover (32) are equipped with trigger components (33), and the trigger components (33) cooperate with the second net cover (32) and the transmission component (26) respectively.
2. The lifting multi-strand wire rope tensile testing device as described in claim 1, characterized in that: The testing mechanism (1) includes a platform (11) placed on the ground. A guide rod (12) is fixed on the top of the platform (11), and a support plate (13) is fixed on the upper end of the guide rod (12). A hydraulic cylinder (14) is fixed on the support plate (13), and a tension gauge (15) is installed on the lower end of the hydraulic cylinder (14). A circular plate (16) is slidably sleeved on the surface of the guide rod (12). A connecting plate (17) is installed on the lower end of the tension gauge (15), and the connecting plate (17) and the circular plate (16) are fixedly connected by a support column. Fixed columns (18) arranged in a circular array are fixed on the top of the platform (11) and the bottom of the circular plate (16). Two fixing mechanisms (2) are respectively installed on the bottom of the circular plate (16) and the top of the platform (11), and fixed on the fixed columns (18). The ring plate (25) is fixed to one end of the fixed column (18).
3. The lifting multi-strand wire rope tensile testing device as described in claim 1, characterized in that: The base (21) has guide grooves (231) arranged in a circular array, and the guide grooves (231) are connected to the inclined grooves (22). The wedge (23) has a guide block (221) fixed on its surface, and the guide block (221) slides in the guide groove (231).
4. The lifting multi-strand wire rope tensile testing device as described in claim 1, characterized in that: The clamping block (24) has a screw groove (241) on the side away from the wedge block (23), and a rubber pad (242) is provided on the side of the clamping block (24) away from the wedge block (23).
5. The lifting multi-strand wire rope tensile testing device as described in claim 2, characterized in that: The transmission component (26) includes a vertical rod (261) fixed between the ring plate (25) and the platform (11) and between the ring plate (25) and the circular plate (16). A movable plate (262) is slidably sleeved on the surface of the vertical rod (261). A square block (263) arranged in a circular array is slidably on the movable plate (262). A spring (264) is fixed between the surface of the wedge block (23) and the surface of the square block (263). A connecting rod (265) is slidably on the square block (263), and one end of the connecting rod (265) is fixed to the surface of the wedge block (23). A retaining ring (266) is fixedly sleeved on the surface of the connecting rod (265), and the retaining ring (266) cooperates with the square block (263).
6. The lifting multi-strand wire rope tensile testing device as described in claim 5, characterized in that: The top of the platform (11) and the bottom of the circular plate (16) are both equipped with rotating frames (267). The movable plate (262) is fixed with ring blocks (268) arranged in a circular array. The rotating frame (267) is provided with grooves (269) arranged in a circular array, and the grooves (269) cooperate with the ring blocks (268). The rotating frame (267) is fixed with limiting blocks (2610) arranged in a circular array. The ring blocks (268) are provided with limiting grooves (2611), and the limiting blocks (2610) cooperate with the limiting grooves (2611).
7. The lifting multi-strand wire rope tensile testing device as described in claim 6, characterized in that: Rollers (2612) rotate on the block (263), and square grooves (2615) that cooperate with the rollers (2612) are provided on the movable plate (262). The rollers (2612) slide in the square grooves (2615). A stop block (2613) is fixed at one end of the connecting rod (265) away from the wedge (23). A second spring (2614) is sleeved on the surface of the vertical rod (261), and the two ends of the second spring (2614) are fixed to the surface of the circular plate (16) and the surface of the movable plate (262) respectively.
8. The lifting multi-strand wire rope tensile testing device as described in claim 6, characterized in that: The trigger (33) includes a spline rod (331) that rotates on the platform (11) and the support plate (13). A worm gear (332) is fixed at the lower end of the spline rod (331). A worm (333) rotates on the platform (11) and meshes with the worm gear (332). A fixing block (334) is fixed at the top of the platform (11) and the bottom of the circular plate (16). A rotating rod (335) rotates on the fixing block (334). A bevel gear one (336) and a bevel gear two (337) are fixed at both ends of the rotating rod (335). The rotating frame (26) 7) A bevel gear ring (338) is fixedly sleeved on the outer surface, and the bevel gear ring (338) meshes with the second bevel gear (337). A spline sleeve (339) rotates on the circular plate (16), and the spline sleeve (339) slides on the surface of the spline rod (331). A bevel gear three (3310) is fixedly sleeved on the lower surface of the spline rod (331), and the bevel gear three (3310) meshes with the first bevel gear below (336). A bevel gear four (3311) is fixedly sleeved on the surface of the spline sleeve (339), and the bevel gear four (3311) meshes with the first bevel gear above (336).
9. The lifting multi-strand wire rope tensile testing device as described in claim 8, characterized in that: A short rod (3312) rotates on the support plate (13). A first spur gear (3313) and a second spur gear (3314) are fixedly sleeved on the surface of the short rod (3312). A circular gear ring (3315) is fixed on the inner wall of the second mesh cover (32), and the second spur gear (3314) meshes with the circular gear ring (3315). A third spur gear (3316) rotates on the upper surface of the spline rod (331), and a groove (3317) is opened in the third spur gear (3316). A driving block (3318) is fixed on the inner wall of the groove (3317). A pushing block (3319) is fixed on the upper surface of the spline rod (331), and the pushing block (3319) cooperates with the driving block (3318).
10. The lifting multi-strand wire rope tensile testing device as described in claim 8, characterized in that: The protective mechanism (3) further includes a drive component (34) installed on the worm gear (333) and the platform (11). The drive component (34) includes a mounting post (341) fixed on the platform (11). One end of the mounting post (341) is fixed with a fixing plate (342), and a rotating post (343) is rotatably mounted on the fixing plate (342). One end of the rotating post (343) is fixed with a docking block (344), and one end of the spline rod (331) is provided with a docking groove (345). The docking block (344) and the docking groove (345) are matched. A permanent magnet (346) is fixed on one end of the rotating column (343). A spring (347) is sleeved on the surface of the rotating column (343). One end of the spring (347) is fixed on the surface of the permanent magnet (346), and the other end is rotatably connected to the fixing plate (342) through a bearing. An electromagnet (348) is fixed on the surface of the fixing plate (342), and the electromagnet (348) is matched with the permanent magnet (346).