Steel strand drawing device

By designing a steel strand pulling device with limiting and driving components, the problem of existing devices being unable to quickly adjust the twist angle was solved, enabling flexible adjustment and efficient production line production, reducing manufacturing costs, and improving production efficiency and product quality.

CN120889147APending Publication Date: 2025-11-04NINGBO KAITE MACHINERY
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Patent Information

Application Number
CN202511327726.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-17
Publication Date
2025-11-04

AI Technical Summary

Technical Problem

Existing steel strand drawing devices cannot quickly adjust the twist angle, causing the production line to be unable to quickly adapt to different user needs, increasing the manufacturing cost of the production line and reducing production efficiency.

Method used

A steel strand pulling device was designed, which enables precise adjustment of the twist angle of the steel strand through a limiting component and a driving component. The device includes components such as a tension plate, a limiting cylinder, a wire pulling plate, and a slider. It can quickly adjust the twist angle according to user needs, reducing the manufacturing cost of additional production lines.

Benefits of technology

This enabled the same production line to quickly adapt to different user needs, reduced production line manufacturing costs, improved production efficiency and effective product output, reduced worker labor intensity, and enhanced market competitiveness.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of steel strand production, in particular to a steel strand drawing device which comprises a tension disc, a center line cylinder and a limiting assembly, a base is fixedly connected to one side of the tension disc, the limiting cylinder is rotationally connected between the tension disc and the base, the center line cylinder is used for drawing the steel strand located in the middle, and the limiting assembly is used for limiting the center line cylinder. One end of the center line cylinder is fixedly connected with the limiting cylinder, the end, away from the center line cylinder, of the limiting cylinder is telescopically connected with a line shifting disc, the limiting assembly is arranged on the tension disc and used for conveniently limiting steel strands and adjusting the twisting angle of the steel strands, and the limiting assembly comprises a plurality of sliding blocks and a driving assembly. The sliding blocks are connected to the tension disc in a sliding mode, limiting columns are connected to the sliding blocks in a clamped mode, and the driving assembly is used for driving control. According to the technical scheme, the same production line can be rapidly adjusted according to different user requirements, the extra production line manufacturing cost is reduced, and the production efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel strand production, in particular to a steel strand drawing device. BACKGROUND

[0002] The steel strand is a steel product composed of multiple steel wires. The surface of the carbon steel can be coated with a zinc layer, a zinc-aluminum alloy layer, an aluminum-coated layer, a copper-coated layer, or an epoxy resin, as needed. When the steel strands are gathered into one, they are formed in a rotating manner with several strands of steel wires. The twist angle needs to be adjusted according to the specific use of the steel strand. If it is used for high-strength engineering structures (such as bridges, subways, etc.), a smaller twist angle is usually selected. If it is used for some flexible applications (such as power cables, conveyor belts, etc.), a larger twist angle is required.

[0003] The existing steel strand drawing device has a fixed position for drawing the steel wire, i.e., the twist angle of the several strands of steel wire cannot be adjusted. However, the forming effect of the steel strand is related to the thickness of the steel wire and the twist angle of the several strands of steel wire. In this case, multiple production lines need to be equipped for use, which makes it impossible to quickly adjust the existing production line to meet the needs of users, greatly increasing the production cost of the production line and reducing the overall production efficiency of the production line. SUMMARY

[0004] The main purpose of the present application is to provide a steel strand drawing device that can quickly adjust the same production line according to different user needs, thereby reducing the additional production cost of the production line and improving the production efficiency.

[0005] To achieve the above-mentioned purpose, the present application provides a steel strand drawing device, which comprises: A tension disc is fixedly connected to a base on one side, and a first limiting cylinder is rotatably connected between the tension disc and the base. A center wire cylinder is used to draw the steel strand in the middle, and one end of the center wire cylinder is fixedly connected to the first limiting cylinder. The end of the first limiting cylinder away from the center wire cylinder is telescopically connected to a wire disc. A limiting assembly is arranged on the tension disc to facilitate the limiting of the steel strand and the adjustment of the twist angle of each steel strand. The limiting assembly comprises a plurality of sliding blocks and a driving assembly. Each sliding block is slidably connected to the tension disc, and a limiting column is clamped to each sliding block. The driving assembly is used to ensure that the sliding distance of the plurality of sliding blocks can be accurately controlled.

[0006] In one possible implementation, the limiting assembly comprises: A first gear and a second gear, both of which are rotationally connected to the tension disc, the first gear is fixedly connected with the first limiting cylinder, a transmission gear is engaged between the first gear and the second gear, a plurality of transmission plates are hingedly connected to the outer ring of the second gear, and each of the transmission plates is hingedly connected with an adjacent sliding block at an end thereof away from the second gear. A plurality of clamping wheels, each of which is rotationally connected to the tension disc and abuts against the outer wall of the second gear, for limiting the second gear.

[0007] In a possible implementation, the sliding block is fixedly connected with a second limiting cylinder, one end of the limiting column is slidingly connected with the second limiting cylinder, a clamping plate is elastically slidingly connected in the sliding block, the clamping plate is fixedly connected with a button, the button is slidingly connected with the sliding block, the limiting column is fixedly connected with a clamping sleeve for clamping and limiting with the clamping plate.

[0008] In a possible implementation, the second limiting cylinder is provided with a dislocation groove.

[0009] In a possible implementation, the limiting column is rotationally connected with a wire pulling cylinder.

[0010] In a possible implementation, the base is fixedly connected with a telescopic air cylinder, the telescopic end of the telescopic air cylinder is fixedly connected with a limiting plate, the wire pulling disc is fixedly connected with a telescopic cylinder, the telescopic cylinder is threadedly connected with the first limiting cylinder, the outer ring of the telescopic cylinder is fixedly connected with a limiting block, and the limiting plate is clamped with the limiting block.

[0011] In a possible implementation, the driving assembly comprises a motor base, the motor base is fixedly connected with the base, the motor base is fixedly connected with a control motor, a driving shaft of the control motor is fixedly connected with a third gear, a fourth gear is fixedly connected with the middle wire cylinder, and the third gear is engaged with the fourth gear.

[0012] In a possible implementation, the outer ring of the wire pulling disc is obliquely arranged away from the tension disc.

[0013] In a possible implementation, a plurality of wire pulling grooves are formed in the wire pulling disc.

[0014] The technical scheme of the present application drives the first limiting cylinder to rotate accurately through the driving assembly in the limiting assembly, and the sliding position of the sliding block on the tension disc is accurately adjusted. Through accurate control of the rotation angle of the first limiting cylinder, the user can adjust the twist angle of the steel wire passing through each limiting column. The same production line can be quickly adjusted according to different user needs, greatly reducing the additional production line manufacturing cost. This means that the enterprise can quickly respond to market changes within a specified period, improve production efficiency, and thus improve the effective output of products and ensure market competitiveness. In addition, different thicknesses of steel wires can be quickly positioned, reducing the labor intensity of workers and improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the drawings shown.

[0016] Figure 1 A schematic diagram of a steel strand drawing device of the present application Figure 1 ; Figure 2 A schematic diagram of a steel strand drawing device of the present application Figure 2 ; Figure 3 A schematic diagram of a steel strand drawing device of the present application Figure 1 ; Figure 4 A schematic diagram of a steel strand drawing device of the present application Figure 5 A schematic diagram of a steel strand drawing device of the present application Figure 4 ; Figure 6 A schematic diagram of a steel strand drawing device of the present application Figure 7 A schematic diagram of a steel strand drawing device of the present application

[0017] Explanation of reference numerals: 11, tension disc; 12, base; 13, first limiting cylinder; 14, centering cylinder; 15, wire pulling disc; 151, wire pulling groove; 21, sliding block; 22, limiting column; 23, first gear; 24, second gear; 25, transmission gear; 26, transmission plate; 27, clamping wheel; 31, second limiting cylinder; 311, dislocation groove; 32, clamping plate; 33, button; 34, clamping sleeve; 35, wire pulling cylinder; 41, telescopic cylinder; 42, limiting plate; 43, telescopic cylinder; 44, limiting block; 51, motor base; 52, control motor; 53, third gear; 54, fourth gear.

[0018] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0020] The present application provides a steel strand drawing device.

[0021] Referring to Figures 1 to 7 , including tension disc 11, base 12, first limiting cylinder 13, centering cylinder 14 and limiting assembly, one side of the tension disc 11 is fixedly connected with the base 12, the first limiting cylinder 13 is rotatably connected between the tension disc 11 and the base 12, the centering cylinder 14 is used for drawing the steel strand in the middle and positioning the steel strand in the middle, the steel wire moves through the centering cylinder 14, the centering cylinder 14 limits the steel wire to prevent the steel wire from deviating, one end of the centering cylinder 14 is fixedly connected with the first limiting cylinder 13, and the other end of the first limiting cylinder 13 away from the centering cylinder 14 is telescopically connected with the wire pulling disc 15. Through the telescopic characteristics of the two, the angle between the point where the several strands are gathered after being wound on the wire pulling disc 15 and the wire pulling disc 15 will change, that is, the twist angle will change. Through different scene use conditions, the telescopic distance of the wire pulling disc 15 is adjusted, so that products with different performances are output.

[0022] Then cooperate with the limiting assembly, the limiting assembly is arranged on the tension disc 11 and is used for conveniently limiting the steel strand and adjusting the twist angle of each steel strand, and is used for cooperating with the transmission of the telescopic connection relationship between the other end of the first limiting cylinder 13 away from the centering cylinder 14 and the wire pulling disc 15, so that the wire pulling disc 15 can move accurately, thereby better improving the product performance and enabling the grading performance to be more accurately adjusted.

[0023] And the limiting assembly includes several sliders 21 and a driving assembly, each slider 21 is slidingly connected to the tension disc 11, each limiting column 22 is clamped on each slider 21, and the driving assembly is used to drive and control the work of each component. Through the driving assembly in the limiting assembly, the first limiting cylinder 13 can be effectively driven to rotate accurately, and the sliding position of the slider 21 on the tension disc 11 can be accurately adjusted. Through accurate control of the rotation angle of the first limiting cylinder 13, the user can realize specific adjustment of the twist angle of the steel wire passing through each limiting column 22. The same production line can be quickly adjusted according to the different needs of users, greatly reducing the additional production line manufacturing cost. This means that the enterprise can quickly respond to market changes within a specified period, improve production efficiency, thereby improving the effective output of products and ensuring market competitiveness. In addition, it can also quickly position different thicknesses of steel wires, reduce the labor intensity of workers, and improve production efficiency.

[0024] With reference to Figures 1 to 4 , the outer circle of the wire shifting disc 15 is inclined away from the tension disc 11. By optimizing the shape of the outer circle of the wire shifting disc 15, it can be deformed more easily in the axial direction. This deformation capability enables the wire shifting disc 15 to better adapt to external pressure when subjected to extrusion. By setting the outer circle of the wire shifting disc 15 in a circular arc shape, the wire shifting disc 15 still has sufficient strength while ensuring deformation. Not only does it ensure that the wire shifting disc 15 will not deform easily during operation, but it can also effectively withstand the extrusion force from several steel wires. It enhances the support strength of the wire shifting disc 15, enabling it to effectively disperse and offset part of the force when the steel wire exerts pressure. When handling multiple steel wires, the wire shifting disc 15 not only reduces the risk of deformation, but also ensures stability under high load conditions. It improves the working efficiency and safety of the entire equipment, and also prolongs the service life of the wire shifting disc 15, providing more reliable support for subsequent production processes.

[0025] With reference to Figures 1 to 4 , several wire shifting grooves 151 are formed on the wire shifting disc 15. By providing several wire shifting grooves 151, multiple single steel wires can better adhere to the outside of the wire shifting disc 15. This allows for precise positioning of the steel wires. During movement, this design effectively prevents the steel wires from sliding randomly, ensuring that the steel wires always remain straight, enhancing the positioning effect and reducing the chaos and damage caused by movement during the conveying process, thereby improving operational efficiency. Keeping the steel wires straight makes the twisting effect more uniform and stable, and in addition, the provision of wire shifting grooves 151 also facilitates the control of the distance between the steel wires, allowing the aggregation effect of the steel wires to be good, thereby improving the aggregation effect of the steel twisted wire and improving the forming effect of the product.

[0026] With reference to Figures 1 to 5, the telescopic cylinder 41 is fixedly connected to the base 12, the base of the telescopic cylinder 41 is connected to the base 12 through screws, the telescopic end of the telescopic cylinder 41 is fixedly connected to the limiting plate 42, the wire adjusting disc 15 is fixedly connected to the telescopic barrel 43, the telescopic barrel 43 is threadedly connected to the first limiting barrel 13, the limiting block 44 is fixedly connected to the outer circle barrel surface of the telescopic barrel 43, and the limiting plate 42 is clamped to the limiting block 44. Workers can adjust the twisting angle of the steel wire, which directly affects the effect of the stranded wire. When the twisting angle is too large (the twisting pitch is too small), although the flexibility of the steel strand is enhanced, the overall tensile strength may decrease due to the reduction of the contact area between the steel wires, which will lead to the insufficient tightness of the wire structure and thus reduce the carrying capacity. On the contrary, if the twisting angle is too small (the twisting pitch is too large), the contact area between the steel wires increases, and the stranded steel strand will be more solid and have strong tensile strength, but the flexibility will decrease and be prone to brittle fracture under stress, although it is suitable for high-strength environments, but it is not conducive to occasions that require flexible bending. When the telescopic shaft of the telescopic cylinder 41 is retracted, the limiting plate 42 is separated from the limiting block 44, and the wire adjusting disc 15 can be flexibly adjusted along with the rotation of the first limiting barrel 13. Through this adjustment, the angle change of the wire adjusting disc 15 enables the overhanging part of the steel wire attached to its outer circle to be reconfigured. This design can ensure that the stranded wire fully adapts to different twisting angles and optimizes the overall structure. When the telescopic shaft of the telescopic cylinder 41 is extended, the limiting plate 42 is clamped to the limiting block 44, and the first limiting barrel 13 drives the wire adjusting disc 15 to move along the axial direction of the first limiting barrel 13 through threaded connection. This mechanism ensures that the wire adjusting disc 15 can respond in time and change accordingly during the twisting angle adjustment to ensure that it perfectly matches the twisting angle of the steel wire. Through such design, not only the adaptability between various parts of the product is improved, but also the user can flexibly adjust according to actual needs, significantly enhancing the practicality and functionality of the product.

[0027] Referring to Figure 1The driving assembly comprises a motor base 51 fixedly connected to the base 12, a control motor 52 fixedly connected to the motor base 51, a driving shaft of the control motor 52 fixedly connected to a third gear 53, a middle line cylinder 14 fixedly connected to a fourth gear 54, and the third gear 53 engaged with the fourth gear 54. By reasonably arranging the control motor 52 in the driving assembly, sufficient operation space can be provided for the steel wire drawn through the middle line cylinder 14. In addition, considering the strength and effect during the drawing process, multiple bases 12 can be set according to different needs, thereby significantly enhancing the drawing and limiting effect of the steel wire. The driving assembly ensures that the sliding distance of the plurality of sliders 21 can be accurately controlled. This accuracy ensures that the twisting angle of the steel wire can be accurately adjusted, thereby ensuring the quality of the final product. The user can flexibly adjust the twisting angle according to the thickness of the steel wire and the number of strands of the steel strand. The user can better meet different production needs and improve the corresponding product output effect. This not only improves the operation precision of the steel wire during production, but also gives the user more flexibility in quality control, thereby reducing the use and manufacturing cost of the production line.

[0028] With reference to Figures 1 to 3 and Figure 7 The limiting assembly comprises a first gear 23, a second gear 24, and a plurality of clamping wheels 27. The first gear 23 and the second gear 24 are both rotationally connected to the tension disc 11. The first gear 23 is fixedly connected to the first limiting cylinder 13. A transmission gear 25 is engaged between the first gear 23 and the second gear 24. The outer ring of the second gear 24 is hingedly connected to a plurality of transmission plates 26. The end of each transmission plate 26 away from the second gear 24 is hingedly connected to an adjacent slider 21. Each clamping wheel 27 is rotationally connected to the tension disc 11 and abuts against the outer wall of the second gear 24 to limit the second gear 24. Through the driving assembly in the limiting assembly, the first limiting cylinder 13 can be effectively driven to rotate. The angle of rotation is accurately controlled, so that the sliding position of each slider 21 on the tension disc 11 can be accurately adjusted. Through the control of the rotation angle, the twisting angle of the steel wire passing through each limiting column 22 can be accurately adjusted. When the user sets different twisting angles according to product needs, the accurate control function of the driving assembly enables the rotation of the first limiting cylinder 13 to be effectively linked with the sliding position of the slider 21, thereby achieving the required twisting angle. This flexibility not only facilitates the user to adjust the parameters according to specific application scenarios, but also enables the product to achieve the expected effect and function. The same production line can be quickly adjusted according to user needs, thereby reducing additional production line manufacturing costs and improving product output efficiency. Thus, the practicality and adaptability of the product are greatly improved. The practicality and application range of the product are further improved.

[0029] With reference to Figures 1 to 6The slider 21 is fixedly connected with the second limiting cylinder 31, one end of the limiting column 22 is slidingly connected with the second limiting cylinder 31, the clamping plate 32 is elastically slidingly connected in the slider 21, for example, through the automatic reset and damping function of the air cylinder, the clamping plate 32 is elastically connected in the slider 21, or a spring with damping can also realize this function, the button 33 is fixedly connected on the clamping plate 32, the button 33 is slidingly connected with the slider 21, the limiting column 22 is fixedly connected with the clamping sleeve 34, and the clamping sleeve 34 is used for clamping and limiting with the clamping plate 32. Through the pressing of the button 33, the user can realize the separation of the clamping plate 32 and the clamping sleeve 34. The user can more flexibly control the distance between the limiting column 22 and the slider 21, so that the worker can easily pass the steel wire of different thicknesses through the limiting column 22. The structure ensures that the steel wire can be effectively limited by the limiting column 22 and be kept in the required position, avoiding random swinging. Specifically, after the user presses the button 33, the separation of the clamping plate 32 and the clamping sleeve 34 makes the limiting column 22 without limiting, and the worker can conveniently adjust the position of the limiting column 22 to adapt to steel wires of different diameters, ensure that they can pass smoothly and be properly limited, and then release the button 33. Since the clamping plate 32 is elastically connected with the inner wall of the slider 21, the clamping plate 32 will automatically reset under the elastic action, successfully re-clamp the clamping sleeve 34 with the set height, so as to complete the limiting of the steel wire with the adjusted height, reduce the operation burden of the worker, and improve the work efficiency.

[0030] With reference to Figures 1 to 6 The dislocation groove 311 is arranged on the second limiting cylinder 31. Through the design of the dislocation groove 311, the user can more easily disengage the end of the limiting column 22 connected with the second limiting cylinder 31 from the second limiting cylinder 31. When the distance of the limiting column 22 inserted into the second limiting cylinder 31 is not large, the convenience of the worker in actual operation is considered, so that they can more easily separate the limiting column 22 from the second limiting cylinder 31, so that the worker can more easily pass the steel wire through the limiting column 22 without complicated operation or laborious adjustment. In addition, not only the flexibility of the connection between the limiting column 22 and the second limiting cylinder 31 is improved, but also the connection of the two is better positioned, so that the worker can quickly and accurately align the required position when connecting or adjusting, thereby improving the work efficiency. Especially in the scene that needs to be frequently disassembled and adjusted, the design of the dislocation groove 311 can effectively reduce the working time of the worker and reduce the error rate in the operation process.

[0031] With reference to Figure 6The steel wire is effectively improved in movement performance when passing through the limiting column 22 through the design and setting of the wire poking cylinder 35. When the steel wire passes through the limiting column 22, the rotation of the wire poking cylinder 35 enables the steel wire attached to its surface to rotate and move synchronously. The direct wear of the limiting column 22 surface caused by the sliding of the steel wire is reduced, thereby greatly prolonging the service life of the limiting column 22. The rotating action of the wire poking cylinder 35 not only helps to reduce friction, but also effectively disperses the stress concentration of the steel wire during the drawing process, reducing the risk of local wear. It ensures that the steel wire can move in an efficient state and avoids additional loss caused by sliding. At the same time, the sliding and rotating function brought by the wire poking cylinder 35 improves the limiting and guiding effect of the steel wire, making the trajectory of the steel wire more stable and accurate. In addition, the rotating movement of the wire poking cylinder 35 can better control the arrangement and guidance of the steel wire, ensuring that the steel wire can maintain an orderly state during the drawing process and avoid winding or misalignment. This stable and reliable guiding mechanism makes the entire operation process smoother, improving production efficiency and safety.

[0032] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] The above is only a preferred embodiment of the present application and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel strand pulling device, characterized in that, include: Tension plate (11), a base (12) is fixedly connected to one side of the tension plate (11), and a first limiting cylinder (13) is rotatably connected between the tension plate (11) and the base (12). The center tube (14) is used to pull the steel strand in the middle. One end of the center tube (14) is fixedly connected to the first limiting tube (13). The end of the first limiting tube (13) away from the center tube (14) is retractably connected to the wire puller (15). The limiting component is set on the tension plate (11) to facilitate the limiting of the steel strands and to adjust the twist angle of each steel strand. The limiting component includes several sliders (21) and a driving component. Each slider (21) is slidably connected to the tension plate (11), and each slider (21) is engaged with a limiting post (22). The driving component is used to ensure that the sliding distance of the several sliders (21) can be accurately controlled.

2. The steel strand pulling device according to claim 1, characterized in that, The limiting component includes: The first gear (23) and the second gear (24) are rotatably connected to the tension plate (11). The first gear (23) is fixedly connected to the first limiting cylinder (13). A transmission gear (25) meshes between the first gear (23) and the second gear (24). Several transmission plates (26) are hinged to the outer ring of the second gear (24). The end of each transmission plate (26) away from the second gear (24) is hinged to the adjacent slider (21). Several locking wheels (27) are rotatably connected to the tension plate (11) and abut against the outer wall of the second gear (24) to limit the second gear (24).

3. The steel strand pulling device according to claim 2, characterized in that, A second limiting cylinder (31) is fixedly connected to the slider (21). One end of the limiting post (22) is slidably connected to the second limiting cylinder (31). A snap-fit ​​plate (32) is elastically slidably connected inside the slider (21). A button (33) is fixedly connected to the snap-fit ​​plate (32). The button (33) is slidably connected to the slider (21). A locking sleeve (34) is fixedly connected to the limiting post (22) for locking and limiting with the snap-fit ​​plate (32).

4. The steel strand pulling device according to claim 3, characterized in that, The second limiting cylinder (31) is provided with a disengagement groove (311).

5. The steel strand pulling device according to claim 3, characterized in that, A wire-drawing cylinder (35) is rotatably connected to the limiting post (22).

6. The steel strand pulling device according to claim 1, characterized in that, A telescopic cylinder (41) is fixedly connected to the base (12). A limit plate (42) is fixedly connected to the telescopic end of the telescopic cylinder (41). A telescopic cylinder (43) is fixedly connected to the dial (15). The telescopic cylinder (43) is threadedly connected to the first limit cylinder (13). A limit block (44) is fixedly connected to the outer ring surface of the telescopic cylinder (43). The limit plate (42) and the limit block (44) are engaged.

7. The steel strand pulling device according to claim 1, characterized in that, The drive assembly includes a motor mount (51), which is fixedly connected to the base (12). A control motor (52) is fixedly connected to the motor mount (51). A third gear (53) is fixedly connected to the drive shaft of the control motor (52). A fourth gear (54) is fixedly connected to the center cylinder (14). The third gear (53) meshes with the fourth gear (54).

8. The steel strand pulling device according to claim 1, characterized in that, The outer ring of the dial (15) is inclined away from the tension plate (11).

9. The steel strand pulling device according to claim 8, characterized in that, The dial plate (15) is provided with several dial slots (151).