Steel strand tensioning equipment

Abstract

The invention relates to the technical field of steel strand production, and discloses steel strand tensioning equipment which comprises a bottom plate, first triangular blocks are fixedly connected to the outer surfaces of the left side and the right side of a transverse plate, a second triangular block is fixedly connected to the side, located in an adjusting frame, of a movable rod, and limiting teeth are fixedly connected to one end of a hook-shaped rod. The outer surfaces of the two supporting frames are rotationally connected with adjusting gears, and the outer surfaces of the tops of the two connecting rods are fixedly connected with racks. When the tension of the steel strand is too large, a tight supporting roller is stressed, the tension of the steel strand can be automatically adjusted under the action of the elastic force of a second spring, and an adjusting gear is limited in cooperation with a first triangular block, a second triangular block, a hook-shaped rod and limiting teeth, so that the tension of the steel strand can float within a certain range; therefore, self-adjustment can be carried out when the tension of the steel strand is too large, and the situation that the steel strand is too loose due to the fact that the tension self-adjustment range is too large is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steel strand production, in particular to a steel strand tensioning device. Background Art

[0002] Steel strand is a steel product composed of multiple steel wires twisted together. According to the number of steel wires in a steel strand, it can be divided into 2-wire steel strand, 3-wire steel strand, 7-wire steel strand and 19-wire steel strand. During the production of steel strand, it is necessary to adjust the tension of the steel strand to avoid breakage caused by over-tightening or over-loosening.

[0003] In the prior art, the steel strand is guided and supported by a guide roller, and the tensioning force of the steel strand is adjusted by adjusting the position of the guide roller. However, when the steel strand is usually supported and tensioned, the tensioning is rigid, resulting in wire breakage when the tensioning force of the steel strand is too large. Some equipment uses a spring set on the guide roller, so that when the tensioning force of the steel strand is too large, the guide roller is subjected to force, causing the spring to deform and adjust the tensioning force. However, in actual use of the above method, after long-term use, the spring becomes fatigued due to repeated stretching and deformation, and its own elastic force gradually decreases, resulting in poor tensioning force on the steel strand, which will make the steel strand not completely in a tensioned state, affecting the winding of the steel strand. It is necessary to continuously adjust the position of the guide roller to adjust the supporting force of the steel strand. Therefore, a steel strand tensioning device is proposed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a steel strand tensioning device to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel strand tensioning device, comprising a bottom plate, a gantry frame is fixedly connected to the top outer surface of the bottom plate, an adjusting screw is threadedly penetrated through the top outer surface of the gantry, a knob is fixedly connected to the top outer surface of the adjusting screw, an adjusting frame is rotatably connected to the bottom outer surface of the adjusting screw, a transverse plate is arranged inside the adjusting frame, two connecting plates are fixedly connected to the bottom outer surface of the transverse plate, and a tensioning roller is rotatably connected between the two connecting plates; The left and right outer surfaces of the horizontal plate are fixedly connected to the first triangular blocks, the left and right outer surfaces of the adjusting frame are movably inserted with movable rods, the movable rod is fixedly connected to the second triangular block on one side of the adjusting frame, the movable rod is fixedly connected to the vertical plate on the side away from the second triangular block, the opposite outer surfaces of the two vertical plates are fixedly connected to the hook-shaped rods, one end of the hook-shaped rod is fixedly connected to the limiting tooth, the top outer surface of the adjusting frame is fixedly connected to two supporting frames, the outer surfaces of the two supporting frames are rotatably connected to adjusting gears, the top outer surface of the horizontal plate is fixedly connected to two connecting rods, the two connecting rods both movably penetrate the top outer surface of the adjusting frame, the top outer surfaces of the two connecting rods are fixedly connected to racks, the two racks are respectively movably meshed with the outer surfaces of the two adjusting gears, and the two limiting teeth are respectively located on one side of the two adjusting gears close to the center of the adjusting frame.

[0006] As a further explanation of the present invention, the top outer surface of the base plate is fixedly connected to a side plate on the rear side, the outer surface of the side plate is rotatably connected to a connecting disk, the other end of the connecting disk is fixedly connected to an adjusting disk, the rear inner surface of the adjusting disk is rotatably connected to a rotating shaft, the inner surface of the adjusting disk is rotatably connected to three threaded rods arranged in a circular array, the outer surface of the rotating shaft is fixedly sleeved with a driving bevel gear, the outer surfaces of the three threaded rods are fixedly sleeved with driven bevel gears, the driving bevel gear is movably engaged with the outer surfaces of the three driven bevel gears, the outer surfaces of the three threaded rods are threadedly connected to threaded blocks, and the outer surfaces of the three threaded blocks are fixedly connected to external support rods.

[0007] As a further explanation of the present invention, a support rod is fixedly connected at the center of the adjusting disk, and a threaded tooth is provided on the outer surface of the support rod. Two threaded sleeves are threadedly connected to the threaded teeth of the support rod, and a limit disk is arranged between the two threaded sleeves, and the limit disk sleeve is arranged on the outer surface of the support rod.

[0008] As a further description of the present invention, first springs are fixedly connected between the two vertical plates and the adjustment frame, and the two first springs are respectively sleeved on the outer surface of the movable rod.

[0009] As a further description of the present invention, two second springs are fixedly connected between the transverse plate and the top inner surface of the adjustment frame, and the two second springs are respectively sleeved on the outer surfaces of the two connecting rods.

[0010] As a further explanation of the present invention, two groups of fixed plates are fixedly connected to the top outer surface of the base plate, each group of fixed plates consists of two fixed plates and are symmetrically arranged on the left and right, and a support roller is rotatably connected between each group of two fixed plates. The two groups of fixed plates are respectively arranged on the front outer surface and the rear outer surface of the portal frame.

[0011] As a further explanation of the present invention, vertical grooves are provided on the left and right outer surfaces of the gantry, and the two vertical plates are respectively arranged inside the two vertical grooves.

[0012] As a further explanation of the present invention, the rear outer surface of the adjusting disk is fixedly connected to a support plate, the outer surface of the support plate is rotatably connected to a worm, the outer surface of the rotating shaft is fixedly sleeved with a worm wheel, and the worm is movably engaged with the outer surface of the worm wheel.

[0013] As a further explanation of the present invention, the outer surface of the adjusting plate and the outer surface of the limiting plate are both provided with three sliding grooves, and the three outer support rods are respectively slidably connected to the inside of the sliding grooves.

[0014] As a further illustration of the present invention, a motor is fixedly mounted on one end of the side plate away from the connecting disk, and an output end of the motor is fixedly connected to the connecting disk.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In a steel strand tensioning device provided by the present invention, when the tension of the steel strand is too large, the tensioning roller is subjected to force, and the tension of the steel strand can be adjusted autonomously under the elastic force of the second spring, and the first triangular block, the second triangular block, the hook-shaped rod and the limit tooth are used to limit the adjusting gear, thereby preventing the rack from moving upward, so that the tensioning roller can only move within a certain range, and the tension of the steel strand can float within a certain range, so that it can self-adjust when the tension of the steel strand is too large, and avoid the range of self-adjustment of the tension being too large, which causes the steel strand to be too loose.

[0016] 2. In a steel strand tensioning device provided by the present invention, the worm gear is driven to rotate by rotating the worm, so that the rotating shaft rotates, the rotating shaft drives the active bevel gear to rotate, and the active bevel gear drives the driven bevel gear to rotate, thereby causing multiple threaded rods to rotate and adjusting the position of the outer support rod so that the steel strands are wound into rings of different diameters.

[0017] 3. In a steel strand tensioning device provided by the present invention, the position of the threaded sleeve is adjusted on the thread teeth of the support rod, and the position of the limit plate is adjusted to control the length of the steel strand wound into a circular ring, and the limit plate is removed by unscrewing the threaded sleeve, so that the steel strand can be easily removed from the surface of the outer support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the portal frame and its related structures of the present invention; Figure 3 It is a cross-sectional schematic diagram of the portal frame and its related structures of the present invention; Figure 4For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle; Figure 6 It is a front view schematic diagram of the adjustment disk and related structures of the present invention; Figure 7 It is a rear view schematic diagram of the adjustment disk and related structures of the present invention; Figure 8 This is a schematic diagram of the internal structure of the adjustment disk of the present invention; Fig. 9 For the present invention Figure 7 Enlarged structural diagram at point C in the middle.

[0019] In the figure: 1, bottom plate; 2, door frame; 3, adjusting screw; 4, knob; 5, adjusting frame; 6, horizontal plate; 7, tightening roller; 8, first triangular block; 9, movable rod; 10, second triangular block; 11, vertical plate; 12, hook-shaped rod; 13, limit teeth; 14, adjusting gear; 15, connecting rod; 16, rack; 17, side plate; 18, connecting plate; 19, adjusting plate; 20, threaded rod; 21, rotating shaft; 22, worm gear; 23, worm; 24, threaded block; 25, active bevel gear; 26, driven bevel gear; 27, support rod; 28, threaded teeth; 29, threaded sleeve; 30, limit plate; 31, outer support rod; 32, motor; 33, fixed plate; 34, support roller. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figure 1-Figure 5The present invention provides a technical solution: a steel strand tensioning device, comprising a base plate 1, a gantry 2 is fixedly connected to the top outer surface of the base plate 1, an adjusting screw 3 is threadedly penetrated through the top outer surface of the gantry 2, a knob 4 is fixedly connected to the top outer surface of the adjusting screw 3, an adjusting frame 5 is rotatably connected to the bottom outer surface of the adjusting screw 3, a cross plate 6 is arranged inside the adjusting frame 5, two connecting plates are fixedly connected to the bottom outer surface of the cross plate 6, a tensioning roller 7 is rotatably connected between the two connecting plates, specifically, when it is necessary to adjust the tensioning force of the steel strand, by rotating the knob 4, the knob 4 drives the adjusting screw 3 to rotate, and the adjusting screw 3 drives the adjusting frame 5 to move downward, so that the tensioning roller 7 moves, thereby adjusting the tensioning force of the tensioning roller 7 on the steel strand.

[0022] The left and right outer surfaces of the horizontal plate 6 are fixedly connected with the first triangular blocks 8, the left and right outer surfaces of the adjusting frame 5 are movably inserted with movable rods 9, the movable rod 9 is fixedly connected with the second triangular block 10 on one side inside the adjusting frame 5, and the movable rod 9 is fixedly connected with the vertical plate 11 on the side away from the second triangular block 10, the opposite outer surfaces of the two vertical plates 11 are fixedly connected with hook-shaped rods 12, one end of the hook-shaped rod 12 is fixedly connected with a limiting tooth 13, the top outer surface of the adjusting frame 5 is fixedly connected with two supporting frames, the outer surfaces of the two supporting frames are rotatably connected with adjusting gears 14, the top outer surface of the horizontal plate 6 is fixedly connected with two connecting rods 15, the two connecting rods 15 are movably penetrated through the top outer surface of the adjusting frame 5, the top outer surfaces of the two connecting rods 15 are fixedly connected with racks 16, the two racks 16 are respectively movably meshed with the outer surfaces of the two adjusting gears 14, the two limiting teeth 13 are respectively located on one side of the two adjusting gears 14 close to the center of the adjusting frame 5. Specifically, when the steel When the tightening force of the strand is too great, the strand applies force to the tightening roller 7, so that the cross plate 6 is stressed and the second spring is deformed. The cross plate 6 drives the connecting rod 15 to move the rack 16 upward, and the rack 16 meshes with the adjusting gear 14 and drives the adjusting gear 14 to rotate. When the first triangular block 8 moves upward to the position in contact with the second triangular block 10, as the first triangular block 8 moves upward, the first triangular block 8 squeezes the second triangular block 10, causing the first spring to deform, thereby driving the vertical plate 11 to move, so that the hook rod 12 moves, and the hook rod 12 drives the limiting tooth 13, so that the limiting tooth 13 is stuck in the teeth of the adjusting gear 14, limiting the adjusting gear 14, so that the rack 16 cannot move upward, so that the tightening roller 7 can only move within a certain range, so that the tension of the strand can float within a certain range, so that it can self-adjust when the tension of the strand is too great, and avoid the range of self-adjustment of the tension being too large, which causes the strand to be too loose.

[0023] In this embodiment, first springs are fixedly connected between the two vertical plates 11 and the adjustment frame 5. The two first springs are respectively sleeved on the outer surface of the movable rod 9. Specifically, when the first triangular block 8 moves upward to a position in contact with the second triangular block 10, as the first triangular block 8 moves upward, the first triangular block 8 squeezes the second triangular block 10, causing the first springs to deform.

[0024] In this embodiment, two second springs are fixedly connected between the cross plate 6 and the top inner surface of the adjusting frame 5, and the two second springs are respectively sleeved on the outer surfaces of the two connecting rods 15. Specifically, when the tightening force of the steel strand is too large, the steel strand applies force to the tightening roller 7, so that the cross plate 6 is subjected to force, causing the second spring to deform.

[0025] In this embodiment, two groups of fixed plates 33 are fixedly connected to the top outer surface of the base plate 1, each group of fixed plates 33 is two and symmetrically arranged, and a support roller 34 is rotatably connected between each group of two fixed plates 33. The two groups of fixed plates 33 are respectively arranged on the front outer surface and the rear outer surface of the gantry 2. Specifically, the steel strand is passed over the top of the front support roller 34, passed under the tensioning roller 7, and then passed over the top of the rear support roller 34 to tension the steel strand.

[0026] In this embodiment, vertical grooves are provided on the left and right outer surfaces of the gantry 2 , and two vertical plates 11 are respectively arranged inside the two vertical grooves. Specifically, the vertical grooves provide required channels for the movement of the vertical plates 11 .

[0027] In the specific implementation process, the steel strand is passed over the front support roller 34, passed under the tensioning roller 7, and then passed over the rear support roller 34 to tension the steel strand. When the tensioning force of the steel strand needs to be adjusted, the knob 4 is turned, and the knob 4 drives the adjusting screw 3 to rotate. The adjusting screw 3 drives the adjusting frame 5 to move downward, so that the tensioning roller 7 moves, thereby adjusting the tensioning force of the tensioning roller 7 on the steel strand. When the tensioning force of the steel strand is too large, the steel strand applies force to the tensioning roller 7, so that the cross plate 6 is subjected to force, so that the second spring is deformed, and the cross plate 6 drives the connecting rod 15 to move the rack 16 upward, and the rack 16 engages with the adjusting gear 14 and drives the adjusting gear 14 to rotate. When the first triangular block 8 moves upward to the position in contact with the second triangular block 10, as the first triangular block 8 moves upward, the first triangular block 8 squeezes the second triangular block 10, causing the first spring to deform, thereby driving the vertical plate 11 to move, causing the hook rod 12 to move, and the hook rod 12 drives the limiting tooth 13, causing the limiting tooth 13 to be stuck in the teeth of the adjusting gear 14, limiting the adjusting gear 14, so that the rack 16 cannot move upward, so that the tensioning roller 7 can only move within a certain range, so that the tension of the steel strand can float within a certain range, so that it can self-adjust when the tension of the steel strand is too large, and avoid the range of self-adjustment of the tension being too large, which causes the steel strand to be too loose.

[0028] Embodiment 2: Please refer to Figure 7-Figure 9 The present invention provides a technical solution: the top outer surface of the bottom plate 1 is fixedly connected to the rear side with a side plate 17, the outer surface of the side plate 17 is rotatably connected to a connecting plate 18, the other end of the connecting plate 18 is fixedly connected to an adjusting plate 19, the rear inner surface of the adjusting plate 19 is rotatably connected to a rotating shaft 21, the inner surface of the adjusting plate 19 is rotatably connected to three threaded rods 20 arranged in a circumferential array, the outer surface of the rotating shaft 21 is fixedly sleeved with a driving bevel gear 25, the outer surfaces of the three threaded rods 20 are fixedly sleeved with driven bevel gears 26, and the driving bevel gear 25 and the outer surfaces of the three driven bevel gears 26 are movably meshed The outer surfaces of the three threaded rods 20 are all threadedly connected with the threaded blocks 24, and the outer surfaces of the three threaded blocks 24 are all fixedly connected with the outer support rods 31. Specifically, when the rotating shaft 21 rotates, the active bevel gear 25 thereon is driven to rotate, and the active bevel gear 25 drives the driven bevel gear 26 to rotate, so that the threaded block 24 moves, and the threaded block 24 drives the outer support rods 31 to move, thereby adjusting the positions of the multiple outer support rods 31, so that the steel strands are wound into rings of different diameters, and the motor 32 drives the connecting disk 18 to rotate, driving the adjusting disk 19 to rotate, so that the multiple outer support rods 31 rotate, and the steel strands are wound.

[0029] In this embodiment, the rear outer surface of the adjusting disk 19 is fixedly connected to a support plate, the outer surface of the support plate is rotatably connected to a worm 23, the outer surface of the rotating shaft 21 is fixedly sleeved with a worm wheel 22, and the worm 23 is movably engaged with the outer surface of the worm wheel 22. Specifically, by rotating the worm 23, the worm 23 drives the worm wheel 22 to rotate, so that the rotating shaft 21 rotates, and the self-locking ability of the worm 23 and the worm wheel 22 prevents the rotating shaft 21 from rotating autonomously.

[0030] In this embodiment, three sliding grooves are provided on the outer surface of the adjustment disk 19 and the outer surface of the limit disk 30, and the three outer support rods 31 are respectively slidably connected to the inside of the sliding grooves. Specifically, the sliding grooves provide a moving channel for the outer support rods 31, so that when the position of the outer support rods 31 is adjusted, the outer support rods 31 slide inside the sliding grooves.

[0031] In this embodiment, a motor 32 is fixedly installed at one end of the side plate 17 away from the connecting disk 18, and the output end of the motor 32 is fixedly connected to the connecting disk 18. Specifically, the connecting disk 18 is driven to rotate by the motor 32, which drives the adjusting disk 19 to rotate, so that the multiple outer support rods 31 rotate to reel in the steel strands.

[0032] In the specific implementation process, one end of the steel strand is wound around the outside of multiple outer support rods 31, and the worm 23 is rotated, which drives the worm wheel 22 to rotate, so that the rotating shaft 21 rotates. When the rotating shaft 21 rotates, it drives the active bevel gear 25 thereon to rotate, and the active bevel gear 25 drives the driven bevel gear 26 to rotate, so that the thread block 24 moves, and the thread block 24 drives the outer support rods 31 to move, thereby adjusting the positions of the multiple outer support rods 31, so that the steel strand is wound into rings of different diameters, and the motor 32 drives the connecting disk 18 to rotate, driving the adjusting disk 19 to rotate, so that the multiple outer support rods 31 rotate, and the steel strand is wound.

[0033] Embodiment 3: Please refer to Figure 7-Figure 8 The present invention provides a technical solution: a support rod 27 is fixedly connected at the center of the adjusting disk 19, and a threaded tooth 28 is provided on the outer surface of the support rod 27. Two threaded sleeves 29 are threadedly connected to the threaded teeth 28 of the support rod 27. A limit disk 30 is arranged between the two threaded sleeves 29. The limit disk 30 is sleeved on the outer surface of the support rod 27. Specifically, a threaded sleeve 29 is screwed on first, and then the limit disk 30 is sleeved, and then another threaded sleeve 29 is screwed on, so that the two threaded sleeves 29 limit the limit disk 30.

[0034] During the specific implementation process, one side of the wound steel strand is limited by the limit plate 30. After the steel strand is wound, it is bundled to prevent it from loosening. Then the outer threaded sleeve 29 is unscrewed, the limit plate 30 is removed, and then the steel strand is removed as a whole.

[0035] Working principle: When the present invention is in use, the steel strand is passed over the front support roller 34, passed under the tensioning roller 7, and then passed over the rear support roller 34 to tension the steel strand. When the tensioning force of the steel strand needs to be adjusted, the knob 4 is turned, and the knob 4 drives the adjusting screw 3 to rotate, and the adjusting screw 3 drives the adjusting frame 5 to move downward, so that the tensioning roller 7 moves, thereby adjusting the tensioning force of the tensioning roller 7 on the steel strand. When the tensioning force of the steel strand is too large, the steel strand applies force to the tensioning roller 7, so that the cross plate 6 is stressed, and the second spring is deformed, and the cross plate 6 drives the connecting rod 15 to move the rack 16 upward, and the rack 16 meshes with the adjusting gear 14 and drives the adjusting gear 14 to rotate. When the first triangular block 8 moves upward to the position in contact with the second triangular block 10, as the first triangular block 8 moves upward, the first triangular block 8 squeezes the second triangular block 10, causing the first spring to deform, thereby driving the vertical plate 11 to move, causing the hook rod 12 to move, and the hook rod 12 drives the limiting tooth 13, causing the limiting tooth 13 to fit into the teeth of the adjusting gear 14, thereby limiting the adjusting gear 14, so that the rack 16 cannot move upward, so that the tensioning roller 7 can only move within a certain range, so that the tension of the steel strand can float within a certain range, so that it can self-adjust when the tension of the steel strand is too large, and avoid the range of self-adjustment of the tension being too large, which causes the steel strand to be too loose.

[0036] One end of the steel strand is wound around the outside of multiple outer support rods 31, and the worm 23 is rotated. The worm 23 drives the worm wheel 22 to rotate, so that the rotating shaft 21 rotates. When the rotating shaft 21 rotates, it drives the active bevel gear 25 thereon to rotate. The active bevel gear 25 drives the driven bevel gear 26 to rotate, so that the thread block 24 moves, and the thread block 24 drives the outer support rods 31 to move, so as to adjust the positions of the multiple outer support rods 31, so that the steel strand is wound into rings of different diameters, and the motor 32 drives the connecting disk 18 to rotate, which drives the adjusting disk 19 to rotate, so that the multiple outer support rods 31 rotate, and the steel strand is wound.

[0037] The limit plate 30 is used to limit one side of the wound steel strand. When the steel strand is wound, it is bundled to prevent it from loosening. Then the outer threaded sleeve 29 is unscrewed, the limit plate 30 is removed, and then the steel strand is removed as a whole.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel strand tensioning device, comprising a base plate (1), characterized in that: The top outer surface of the bottom plate (1) is fixedly connected to a gantry frame (2), the top outer surface of the gantry frame (2) is threadedly penetrated by an adjusting screw (3), the top outer surface of the adjusting screw (3) is fixedly connected to a knob (4), the bottom outer surface of the adjusting screw (3) is rotatably connected to an adjusting frame (5), a transverse plate (6) is provided inside the adjusting frame (5), the bottom outer surface of the transverse plate (6) is fixedly connected to two connecting plates, and a tensioning roller (7) is rotatably connected between the two connecting plates; The left and right outer surfaces of the horizontal plate (6) are both fixedly connected to the first triangular blocks (8); the left and right outer surfaces of the adjustment frame (5) are both movably inserted with movable rods (9); the side of the movable rod (9) located inside the adjustment frame (5) is fixedly connected to the second triangular block (10); the side of the movable rod (9) away from the second triangular block (10) is fixedly connected to the vertical plate (11); the opposite outer surfaces of the two vertical plates (11) are both fixedly connected to hook-shaped rods (12); one end of the hook-shaped rod (12) is fixedly connected to the limiting tooth (13); the top outer surface of the adjustment frame (5) is fixedly connected to the second triangular block (10); Two support frames are fixedly connected to the surface, and the outer surfaces of the two support frames are rotatably connected to the adjustment gears (14). The top outer surface of the horizontal plate (6) is fixedly connected to two connecting rods (15). The two connecting rods (15) are movably penetrated through the top outer surface of the adjustment frame (5). The top outer surfaces of the two connecting rods (15) are fixedly connected to racks (16). The two racks (16) are movably meshed with the outer surfaces of the two adjustment gears (14), and the two limit teeth (13) are respectively located on one side of the two adjustment gears (14) close to the center of the adjustment frame (5).

2. A steel strand tensioning device according to claim 1, characterized in that: The top outer surface of the bottom plate (1) is fixedly connected to a side plate (17) at the rear side, the outer surface of the side plate (17) is rotatably connected to a connecting plate (18), the other end of the connecting plate (18) is fixedly connected to an adjusting plate (19), the rear inner surface of the adjusting plate (19) is rotatably connected to a rotating shaft (21), the inner surface of the adjusting plate (19) is rotatably connected to three threaded rods (20) arranged in a circumferential array, the outer surface of the rotating shaft (21) is fixedly sleeved with a driving bevel gear (25), the outer surfaces of the three threaded rods (20) are fixedly sleeved with driven bevel gears (26), the driving bevel gear (25) is movably meshed with the outer surfaces of the three driven bevel gears (26), the outer surfaces of the three threaded rods (20) are threadedly connected to threaded blocks (24), and the outer surfaces of the three threaded blocks (24) are fixedly connected to external support rods (31).

3. A steel strand tensioning device according to claim 2, characterized in that: A support rod (27) is fixedly connected at the center of the adjustment disk (19); a threaded tooth (28) is provided on the outer surface of the support rod (27); two threaded sleeves (29) are threadedly connected at the threaded tooth (28) of the support rod (27); a limit plate (30) is provided between the two threaded sleeves (29); and the limit plate (30) is sleeved on the outer surface of the support rod (27).

4. The steel strand tensioning device according to claim 1, characterized in that: A first spring is fixedly connected between the two vertical plates (11) and the adjustment frame (5), and the two first springs are respectively sleeved on the outer surface of the movable rod (9).

5. The steel strand tensioning device according to claim 1, characterized in that: Two second springs are fixedly connected between the transverse plate (6) and the top inner surface of the adjustment frame (5), and the two second springs are respectively sleeved on the outer surfaces of the two connecting rods (15).

6. The steel strand tensioning device according to claim 1, characterized in that: Two groups of fixed plates (33) are fixedly connected to the top outer surface of the bottom plate (1), each group of fixed plates (33) is two and is arranged symmetrically on the left and right, a support roller (34) is rotatably connected between the two fixed plates (33) in each group, and the two groups of fixed plates (33) are respectively arranged on the front outer surface and the rear outer surface of the portal frame (2).

7. The steel strand tensioning device according to claim 1, characterized in that: The left and right outer surfaces of the portal frame (2) are both provided with vertical grooves, and the two vertical plates (11) are respectively arranged inside the two vertical grooves.

8. The steel strand tensioning device according to claim 2, characterized in that: The rear outer surface of the adjusting disk (19) is fixedly connected to a support plate, the outer surface of the support plate is rotatably connected to a worm (23), the outer surface of the rotating shaft (21) is fixedly sleeved with a worm wheel (22), and the worm (23) is movably meshed with the outer surface of the worm wheel (22).

9. The steel strand tensioning device according to claim 3, characterized in that: The outer surface of the adjustment plate (19) and the outer surface of the limit plate (30) are both provided with three slide grooves, and the three outer support rods (31) are respectively slidably connected to the inside of the slide grooves.

10. The steel strand tensioning device according to claim 2, characterized in that: A motor (32) is fixedly mounted on one end of the side plate (17) away from the connecting disk (18), and an output end of the motor (32) is fixedly connected to the connecting disk (18).

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