Straightening device for prestressed steel strand production

Abstract

The invention relates to the technical field of steel strand production, in particular to a straightening device for prestressed steel strand production. Comprising a working table, the working table is rotationally connected with a rotating frame, a driving motor is installed on the working table, the rotating frame is in spline connection with a spline sleeve, the working table is rotationally connected with a transmission shaft, a friction wheel is arranged on the transmission shaft, and an output shaft of the driving motor is fixedly connected with a frustum wheel. The rotating frame is provided with a plurality of supporting rings, all the supporting rings are divided into two groups, the supporting rings are in spline connection with sliding sleeves, and the sliding sleeves are provided with straightening rollers. The corresponding straightening rollers are driven by the sliding sleeves to move, the straightening rollers are not in contact with the steel strands, the situation that the straightening rollers are abraded due to the fact that the unevenly-twisted steel strands extrude the straightening rollers is avoided, the service life of the straightening rollers is prolonged, and meanwhile the situation that the straightening rollers deform due to uneven stress, and consequently follow-up straightening is inaccurate is prevented.

Description

Technical Field

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

[0002] Prestressed steel strand is a high-strength steel product widely used in civil engineering and building structures. It is made of multiple high-carbon steel wires twisted (twisted) to increase the strength and stability of the structure by applying prestress. To ensure that the prestressed steel strand can achieve optimal performance during construction and application, it is usually straightened.

[0003] In the production process of prestressed steel strands, uneven twisting is inevitable. However, when straightening the unevenly twisted prestressed steel strands, the diameter of the unevenly twisted parts of the prestressed steel strands will increase, so greater force is required to achieve straightening, which increases the workload of the straightener. The increased load on the motor and other drive systems will lead to overheating, reduced efficiency, and even damage to the motor or other transmission components. At the same time, during the straightening process of the unevenly twisted steel strands, due to the large friction between the strands, it is easy to scratch the surface of the straightening wheel, which will cause scratches or pits on the surface of the straightening wheel, further affecting the straightening quality and causing more damage to the surface of the steel strands. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a straightening device for prestressed steel strand production.

[0005] The technical solution of the present invention is: a straightening device for prestressed steel strand production, comprising a workbench, the workbench is rotatably connected to a rotating frame, the workbench is installed with a driving motor, the rotating frame is splined with a spline sleeve, the workbench is rotatably connected to a transmission shaft, the transmission shaft and the spline sleeve are connected through a pulley belt transmission, a friction wheel is arranged on the transmission shaft, the output shaft of the driving motor is fixedly connected with a frustum wheel, the frustum wheel and the friction wheel are connected through friction transmission, the rotating frame is provided with a plurality of supporting rings, all of the supporting rings are divided into two groups, the supporting rings are splined with a sliding sleeve, the sliding sleeve is provided with a straightening roller, the sliding sleeve is rotatably connected to the rotating frame, the workbench is provided with a driving mechanism, the driving mechanism is used to drive all the rotating frames to move, and the workbench is provided with a detection mechanism, the detection mechanism is used to detect the diameter of the steel strand.

[0006] Furthermore, the driving mechanism includes an electric push rod, which is installed on the workbench, and the telescopic end of the electric push rod is slidably connected to a connecting frame, which is slidably connected to the rotating frame, and the connecting frame is provided with two connecting rods, and two supporting rods are fixed to the rotating frame, and the supporting rods are spline-connected to adjacent connecting rods, and the connecting rod is provided with a driving frame, and the driving frame is provided with rotating seats with the same number as that in each group of support rings, and the rotating seat is rotatably connected to a limiting frame, and the limiting frame is slidably connected to a sliding rod, and the sliding rod is rotatably connected to the adjacent rotating frame, and the sliding rod is slidably connected to the rotating frame.

[0007] Furthermore, the detection mechanism includes:

[0008] A detection cylinder, fixedly connected to the workbench;

[0009] The sensing plates have a plurality of pairs, all of which are rotatably connected in the detection barrel, and a torsion spring is fixedly connected between the sensing plates and the detection barrel;

[0010] A sliding ring is slidably connected to the detection cylinder, a first spring is arranged between the sliding ring and the detection cylinder, a plurality of driving rods are slidably connected in the detection cylinder, the number of the driving rods is consistent with the number of the sensing plates, the driving rods and the adjacent sensing plates are driven by gear racks, and the driving rods are used to push the sliding ring to move;

[0011] A trigger component is arranged on the workbench and is used to control the opening and closing of the electric push rod.

[0012] Furthermore, the trigger component includes:

[0013] A first sleeve is fixedly connected to the detection cylinder, the first sleeve is slidably connected to a first block, a second spring is arranged between the first sleeve and the sliding ring is used to push the first block to move;

[0014] An induction sleeve, fixed to the workbench and connected to the first sleeve;

[0015] An alarm is installed on the workbench, and a switch is provided in the induction sleeve, and the switch is used to control the alarm and the electric push rod;

[0016] A limiting assembly is arranged on the detection cylinder and is used for limiting the position of the first block.

[0017] Furthermore, the limit assembly includes:

[0018] The second sleeve is fixed in the detection cylinder, the second sleeve is slidably connected with the second block, and a third spring is arranged between the two, the second block is in extrusion contact with the sliding ring, the first sleeve is fixed with a limiting telescopic rod, the limiting telescopic rod is connected with the second sleeve, the telescopic end of the limiting telescopic rod passes through the first sleeve, and limits the first block.

[0019] Furthermore, it also includes:

[0020] There are two total stroke adjustment mechanisms, which are respectively arranged on adjacent driving frames and are used to adjust the relative position of the driving frame and the rotating seat thereon. The total stroke adjustment assembly includes:

[0021] A transmission rod, spline-connected to all the rotating seats of the same driving frame;

[0022] Limiting members, the number of which is the same as that of each group of support rings, are all fixed to the transmission rod, and the limiting members are used to limit the adjacent rotating seats;

[0023] A limit rod is threadedly connected to one of the rotating seats, the limit rod is in compression contact with the transmission rod, the rotating seat and the connecting rod are both slidably connected to the driving frame, the driving frame is threadedly connected to the limit column, and the limit column of the driving frame is in compression contact with the connecting rod.

[0024] Furthermore, it also includes:

[0025] There are two transition rods, which are respectively rotatably connected to the side of the adjacent connecting rod away from the supporting rod, and the transition rod is threadedly connected to the connecting frame.

[0026] Furthermore, it also includes:

[0027] There are two angle adjustment mechanisms, both of which are arranged on the rotating frame, for adjusting the deflection angle of the adjacent support rings, and the angle adjustment mechanism includes:

[0028] A rotating rod, rotatably connected to the rotating frame;

[0029] A supporting sleeve, threadedly connected to the rotating rod;

[0030] The rack frame is slidably connected in the rotating frame and fixedly connected to the supporting sleeve. All the supporting rings in an adjacent group are connected to the rack frame through gear transmission, and the supporting rings are rotatably connected to the rotating frame.

[0031] Furthermore, a baffle is fixedly connected to the straightening roller, the straightening roller is slidably connected to the sliding sleeve, and a tension spring is arranged between the two. The sliding sleeve is provided with a plurality of limiting grooves, and the limiting grooves on the sliding sleeve are used to limit the baffle.

[0032] Furthermore, it also includes:

[0033] The sliding frame is fixedly connected to the telescopic end of the electric push rod, the sliding frame is rotationally connected to the friction wheel, and the friction wheel is spline-connected to the transmission shaft.

[0034] The beneficial effects of the present invention are as follows: 1. The present invention drives the corresponding straightening roller to move through the sliding sleeve, so that the straightening roller loses contact with the steel strand, thereby preventing the unevenly twisted steel strand from squeezing the straightening roller and causing wear of the straightening roller, extending the service life of the straightening roller, and preventing the straightening roller from deforming due to uneven force, thereby causing inaccurate subsequent straightening, and preventing the load on the drive motor from increasing, causing it to overheat and be damaged.

[0035] 2. The present invention contacts the steel strands through a plurality of pairs of induction plates and utilizes the distribution of the plurality of pairs of induction plates to ensure that the circumference of the steel strands is in contact with the induction plates, thereby ensuring the accuracy of the detection of the twisting degree of the steel strands.

[0036] 3. By moving the driving frame, the driving frame and the rotating seat slide relative to each other, and the limit frame deflects, thereby adjusting the inclination angle of the limit frame, thereby adjusting the travel of the straightening roller, thereby increasing the application range of the device and making the device suitable for steel strands of different diameters.

[0037] 4. The present invention rotates the transition rod to make the limit frame and the sliding rod slide relative to each other, thereby adjusting the initial position of the straightening roller, thereby making the device suitable for steel strands of different diameters.

[0038] 5. The present invention rotates the rotating rod to make the rack frame synchronously drive the adjacent support rings to rotate, thereby synchronously adjusting the deflection angles of the adjacent straightening rollers, speeding up the adjustment of the straightening rollers and improving the use efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0040] Figure 2 It is a three-dimensional structural schematic diagram of the rotating frame and the detection tube of the present invention;

[0041] Figure 3 It is a three-dimensional structural cross-sectional view of the rotating frame of the present invention;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the transmission shaft, friction wheel and frustum wheel of the present invention;

[0043] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting frame and the sliding frame of the present invention;

[0044] Figure 6 It is a schematic diagram of the three-dimensional structure of the support ring, the sliding sleeve and the straightening roller of the present invention;

[0045] Figure 7 It is a schematic diagram of the three-dimensional structure of the sliding sleeve, the straightening roller and the rotating frame of the present invention;

[0046] Figure 8 It is a three-dimensional structural schematic diagram of the baffle of the present invention;

[0047] Fig. 9 It is a schematic diagram of the three-dimensional structure of the connecting rod, the supporting rod and the driving frame of the present invention;

[0048] Fig.10 It is a schematic diagram of the three-dimensional structure of the rotating seat, the limiting frame and the sliding rod of the present invention;

[0049] Fig.11 It is a three-dimensional structural schematic diagram of the transmission rod and the limiting member of the present invention;

[0050] Fig.12 It is a three-dimensional structural exploded diagram of the parts at the connecting rod of the present invention;

[0051] Fig.13 It is a three-dimensional structural schematic diagram of the components in the detection tube of the present invention;

[0052] Fig.14 It is a schematic diagram of the three-dimensional structure of the sliding ring of the present invention;

[0053] Fig.15 It is a schematic diagram of the three-dimensional structure of the first sleeve and the first block of the present invention;

[0054] Fig.16 It is a schematic diagram of the three-dimensional structure of the limiting member and the limiting rod of the present invention.

[0055] Parts names and serial numbers in the figure: 1- workbench, 2- rotating frame, 3- driving motor, 4- spline sleeve, 5- transmission shaft, 6- friction wheel, 7- cone wheel, 8- support ring, 9- sliding sleeve, 10- straightening roller, 11- rotating frame, 21- electric push rod, 22- connecting frame, 23- connecting rod, 24- supporting rod, 25- driving frame, 26- rotating seat, 27- limiting frame, 28- sliding rod, 31- detection Cylinder, 32-sensing plate, 33-sliding ring, 34-driving rod, 35-first sleeve, 351-first block, 36-sensing sleeve, 37-alarm, 38-second sleeve, 381-second block, 39-limiting telescopic rod, 41-transmission rod, 42-limiting member, 43-limiting rod, 51-transition rod, 61-rotating rod, 62-supporting sleeve, 63-rack frame, 71-baffle, 81-sliding frame. DETAILED DESCRIPTION

[0056] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] Embodiment 1: A straightening device for prestressed steel strand production, such as Figure 1-Figure 8 As shown, it includes a workbench 1, which is rotatably connected to a rotating frame 2, a driving motor 3 is installed on the workbench 1, the rotating frame 2 is splined with a spline sleeve 4, the workbench 1 is rotatably connected to a transmission shaft 5, the transmission shaft 5 is connected to the spline sleeve 4 through a pulley belt transmission, a friction wheel 6 is arranged on the transmission shaft 5, the output shaft of the driving motor 3 is fixedly connected to a frustum wheel 7, the frustum wheel 7 is connected to the friction wheel 6 through friction transmission, the rotating frame 2 is provided with a plurality of support rings 8, all of which are divided into two groups, the support ring 8 is splined with a sliding sleeve 9, the sliding sleeve 9 is provided with a straightening roller 10, the sliding sleeve 9 is rotatably connected to a rotating frame 11, the workbench 1 is provided with a driving mechanism, the driving mechanism is used to drive all the rotating frames 11 to move, and a detection mechanism is arranged on the workbench 1, the detection mechanism is used to detect the diameter of the steel strand.

[0058] In the above scheme, a method for changing the position of the straightening roller 10 is provided. When encountering unevenly twisted prestressed steel strands, the straightening rollers 10 on the front and rear sides move back to back and away from the prestressed steel strands; rubber sleeves are provided on the outer sides of the friction wheel 6 and the conical wheel 7, thereby increasing the friction between the two and ensuring smooth transmission; in this scheme, the number of support rings 8 is eight, that is, the number of support rings 8 in each group is four, and the front and rear groups of support rings 8 are staggered and fully contact the prestressed steel strands.

[0059] like Figure 1-Figure 6 and Figure 9-12As shown, the driving mechanism includes an electric push rod 21, which is installed on the workbench 1. The telescopic end of the electric push rod 21 is slidably connected to a connecting frame 22, which is slidably connected to the rotating frame 2. The connecting frame 22 is provided with two connecting rods 23. Two supporting rods 24 are fixed to the rotating frame 2. The supporting rods 24 are spline-connected to adjacent connecting rods 23. The connecting rods 23 are provided with a driving frame 25. The driving frame 25 is provided with rotating seats 26 whose number is the same as that in each group of support rings 8. The rotating seats 26 are rotatably connected to a limiting frame 27. The limiting frame 27 is slidably connected to a sliding rod 28. The sliding rod 28 is rotatably connected to the adjacent rotating frame 11, and the sliding rod 28 is slidably connected to the rotating frame 2.

[0060] In the above scheme, a method of controlling the back-to-back movement of the front and rear support rings 8 is proposed to keep the support rings 8 away from the prestressed steel strands; the connecting frame 22 is composed of a circular ring and two L-shaped rods; the support rod 24 is used to support the connecting rod 23 to ensure the stability of the connecting rod 23; the specific shape of the driving frame 25 is as follows: Fig.12 As specifically shown in the figure, there are four cross bars on the upper side, corresponding to the four rotating seats 26; the limit frame 27 is in an inclined state, and the inclination angle of the limit frame 27 determines the distance of the forward and backward movement of the sliding rod 28, and the rotating frame 2 is provided with straight grooves with the same number as the sliding rod 28, and the sliding rod 28 slides in the straight grooves.

[0061] like Figure 1 , Figure 2 and Figure 13-Figure 15 As shown, the detection mechanism includes: a detection cylinder 31, which is fixed on the workbench 1; a plurality of pairs of induction plates 32, which are all rotatably connected in the detection cylinder 31, and a torsion spring is fixed between the induction plate 32 and the detection cylinder 31; a sliding ring 33, which is slidably connected to the detection cylinder 31, and a first spring is arranged between the sliding ring 33 and the detection cylinder 31, and a plurality of driving rods 34 are slidably connected in the detection cylinder 31, and the number of the driving rods 34 is consistent with the number of the induction plates 32, and the driving rods 34 and the adjacent induction plates 32 are driven by gear racks, and the driving rods 34 are used to push the sliding ring 33 to move; a trigger assembly, which is arranged on the workbench 1, and is used to control the opening and closing of the electric push rod 21.

[0062] In the above scheme, a method for monitoring the diameter of the prestressed steel strand is proposed, so as to identify the position of the uneven twisting of the prestressed steel strand. In this scheme, there are four pairs of induction plates 32 in total, and the four pairs of induction plates 32 are staggered with each other to ensure full contact with the circumferential side of the prestressed steel strand. The opposite sides of each pair of induction plates 32 are rotatably connected with squeezing rollers, which are used to contact the steel strands, thereby reducing damage to the prestressed steel strands.

[0063] like Figure 13-Figure 15As shown, the trigger assembly includes: a first sleeve 35, fixedly connected to the detection tube 31, the first sleeve 35 is slidably connected to the first block 351, and a second spring is arranged between the two, and the sliding ring 33 is used to push the first block 351 to move; a sensing sleeve 36, fixedly connected to the workbench 1, and connected to the first sleeve 35; an alarm 37, installed on the workbench 1, a switch is arranged in the sensing sleeve 36, and the switch is used to control the alarm 37 and the electric push rod 21; a limit assembly, arranged on the detection tube 31, is used to limit the first block 351.

[0064] In the above scheme, gas is filled between the first sleeve 35 and the first block 351; initially, the first sleeve 35 is not connected to the sensing sleeve 36. When the straightening operation begins, the operator connects the sensing sleeve 36 to the first sleeve 35. When the internal pressure increases, the switch inside is triggered; the alarm 37 is used to remind the operator. When the switch inside the sensing sleeve 36 is turned on, the alarm 37 sounds an alarm; the second spring on the first block 351 is initially in a compressed state.

[0065] like Figure 13-Figure 15 As shown, the limiting assembly includes: a second sleeve 38, fixedly connected in the detection tube 31, the second sleeve 38 is slidably connected with a second block 381, and a third spring is arranged between the two, the second block 381 is in extrusion contact with the sliding ring 33, and a limiting telescopic rod 39 is fixedly connected to the first sleeve 35, the limiting telescopic rod 39 is connected to the second sleeve 38, and the telescopic end of the limiting telescopic rod 39 passes through the first sleeve 35 and limits the first block 351.

[0066] In the above scheme, the third spring on the second sleeve 38 is initially in a compressed state to ensure that the second block 381 is always in contact with the sliding ring 33; the telescopic portion of the limiting telescopic rod 39 is a wedge-shaped block, which is used to limit the first block 351; the second sleeve 38 and the limiting telescopic rod 39 are both filled with hydraulic oil.

[0067] Working process: When using this device to straighten the steel strand, the operator first passes the end of the steel strand through the detection cylinder 31 and the rotating frame 2, so that the steel strand passes between all the straightening rollers 10, and then passes the end of the steel strand through the spline sleeve 4, and then fixes the end of the steel strand on the winding device. At this time, the preparation work for the straightening operation is completed.

[0068] In the process of the steel strand passing through the detection tube 31, when the steel strand contacts the outermost pair of sensor plates 32, the two sensor plates 32 are deflected and move away from each other, and the torsion springs of both are charged, the sensor plates 32 rotate and drive the drive rod 34 to move to the left through the gear thereon, and the drive rod 34 pushes the sliding ring 33 to move to the left (the first spring thereon is compressed), and the sliding ring 33 loses contact with the other driving rods 34. As the steel strand gradually moves and squeezes the remaining sensor plates 32 in turn, since the diameters of the steel strands at different positions are the same, the deflection angles of the remaining sensor plates 32 are consistent with the deflection angles of the first pair of sensor plates 32, and the remaining driving rods 34 contact the sliding ring 33 again.

[0069] After the sliding ring 33 moves to the left, the second block 381 moves to the left under the action of the third spring thereon and maintains contact with the sliding ring 33. The second block 381 moves and causes the second sleeve 38 to extract the hydraulic oil in the limiting telescopic rod 39. The telescopic end of the limiting telescopic rod 39 is retracted and loses the limit on the first block 351. The first block 351 moves to the right under the action of the second spring thereon and contacts the sliding ring 33. At this time, the operator connects the first sleeve 35 with the induction sleeve 36.

[0070] After completing the preparations before straightening, the operator turns on the drive motor 3, and the output shaft of the drive motor 3 drives the frustum wheel 7 to rotate, and the frustum wheel 7 drives the friction wheel 6 to rotate through friction, and the friction wheel 6 drives the transmission shaft 5 to rotate, and the transmission shaft 5 drives the spline sleeve 4 through the pulley belt, and the spline sleeve 4 drives the rotating frame 2 to rotate, and the rotating frame 2 drives all the support rings 8 thereon to rotate circumferentially, and the support ring 8 drives the straightening roller 10 to rotate through the sliding sleeve 9, so that the steel strand is straightened by the circumferentially rotating straightening roller 10, and at the same time, the winding device winds the steel strand, so that the steel strand moves slowly to the right, so that the steel strand is slowly straightened.

[0071] When the stranded steel wire is unevenly twisted, the diameter of the unevenly twisted part is larger, and the stranded steel wire squeezes one of the induction plates 32. The induction plate 32 deflects again, causing the torsion spring on it to store force again. The deflected induction plate 32 drives the adjacent driving rod 34 to move to the left through the gear on it and squeezes the sliding ring 33. The sliding ring 33 pushes the first block 351. The first block 351 compresses the second spring and pushes the gas in the first sleeve 35, causing the gas in the first sleeve 35 to enter the induction sleeve 36. The air pressure in the induction sleeve 36 increases, and the internal switch is turned on to control the alarm 37 to sound an alarm, thereby reminding the operator that there is a defect in the stranded steel wire here and the stranded steel wire can be cut off.

[0072] After the air pressure in the sensing sleeve 36 increases, the switch in the sensing sleeve 36 controls the electric push rod 21 to turn on, the telescopic end of the electric push rod 21 moves to the left and pushes the connecting frame 22 to move, the connecting frame 22 drives the driving frame 25 to move through the connecting rod 23, and the driving frame 25 drives the adjacent limit frame 27 to move to the left through the rotating seat 26 thereon, and the limit frame 27 squeezes the adjacent sliding rod 28, so that the front and rear corresponding sliding rods 28 move back to back, the sliding rod 28 drives the sliding sleeve 9 to move through the rotating frame 11, and the sliding sleeve 9 drives the straightening roller 10 to move, and the corresponding straightening rollers 10 on the front and rear sides move away from each other, and the straightening roller 10 loses contact with the steel strand, so as to avoid the unevenly twisted steel strand squeezing the straightening roller 10, which leads to wear of the straightening roller 10, thereby extending the service life of the straightening roller 10 and preventing the straightening roller 10 from being deformed due to uneven force, which leads to inaccurate subsequent straightening.

[0073] After the sliding rod 28 moves to the limit position along the limiting frame 27 , the electric push rod 21 is closed and the connecting rod 23 stops moving.

[0074] After the operator finds that the alarm 37 sounds an alarm, the operator turns off the winding device and the drive motor 3, and processes the steel strands. After the steel strands are processed, the operator controls the telescopic end of the electric push rod 21 to retract, so that all the straightening rollers 10 are reset, and all the induction plates 32 are reset, and the sliding ring 33 is pushed to reset, so that the induction sleeve 36 is disconnected from the first sleeve 35, and the first block 351 is pushed to reset, so that the limiting telescopic rod 39 limits the first block 351 again, and then repeats the above preparations and continues to straighten the steel strands.

[0075] In the above-mentioned embodiment, the connecting rod 23 and the connecting frame 22 are fixedly connected. In the following embodiment, the connecting rod 23 and the connecting frame 22 lose connection and are connected via a transition rod 51 .

[0076] Embodiment 2: Based on embodiment 1, Fig.10 , Fig.11 and Fig.16 As shown, it also includes: a total stroke adjustment mechanism, which has two, which are respectively arranged on adjacent drive frames 25, and are used to adjust the relative position of the drive frame 25 and the rotating seat 26 thereon, and the total stroke adjustment component includes: a transmission rod 41, which is splined to all the rotating seats 26 of the same drive frame 25; a limit member 42, the number of which is consistent with the number of the limit members in each group of support rings 8, and they are all fixed to the transmission rod 41, and the limit member 42 is used to limit the adjacent rotating seats 26; a limit rod 43, which is threadedly connected to one of the rotating seats 26, the limit rod 43 is in compression contact with the transmission rod 41, the rotating seat 26 and the connecting rod 23 are both slidably connected to the drive frame 25, the drive frame 25 is threadedly connected to the limit column, and the limit column of the drive frame 25 is in compression contact with the connecting rod 23.

[0077] The above scheme aims to propose a method for adjusting the inclination angle of the limit frame 27, changing the movement stroke of the sliding rod 28, and then controlling the movement distance of the straightening roller 10, so that the device can adapt to prestressed steel strands of different thicknesses; the transmission rod 41 is slidably connected to the four rotating seats 26 of the same group, and the transmission rod 41 has four limit members 42; each cross bar of the drive frame 25 is provided with a plurality of slots, and the limit members 42 are inserted into the slots of the adjacent drive frames 25 to limit the rotating seats 26.

[0078] like Figure 2-Figure 5 and Fig.12 As shown, it also includes: a transition rod 51, which has two, and is respectively rotatably connected to the side of the adjacent connecting rod 23 away from the support rod 24, and the transition rod 51 is threadedly connected to the connecting frame 22; by rotating the transition rod 51, the transition rod 51 is moved along the thread of the connecting frame 22, thereby controlling the position of the connecting rod 23.

[0079] Workflow: Generally speaking, the diameter change caused by uneven twisting of steel strands of different diameters is closely related to the original diameter. Steel strands with smaller diameters are more likely to show obvious diameter changes, while steel strands with larger diameters have relatively smaller changes.

[0080] When straightening steel strands of different diameters, the positions of all straightening rollers 10 need to be adjusted according to the diameter of the steel strand, and the movable stroke of the straightening rollers 10 needs to be adjusted according to the diameter change, so that the squeezing pressure of the straightening rollers 10 on the steel strands can always be kept constant and the straightening rollers 10 can completely lose contact with the steel strands.

[0081] If a steel strand with a larger diameter is to be straightened, the initial position of the straightening roller 10 is adjusted so that the distance between the two adjacent straightening rollers 10 on the front and rear sides corresponds to the diameter of the steel strand (this paragraph is based on Figure 4 Taking the moving direction of the part in the middle as an example), the operator rotates the transition rod 51 to move the transition rod 51 to the left, and the transition rod 51 pushes the connecting rod 23 to move to the left, and the connecting rod 23 drives the driving frame 25 thereon to move to the left, and the connecting rod 23 slides along the support rod 24, and the driving frame 25 drives the limit frame 27 to move to the left through the rotating seat 26, so that the sliding rod 28 slides along the limit frame 27, and the initial position of the straightening roller 10 is adjusted. The distance between the two adjacent straightening rollers 10 in front and behind corresponds to the diameter of the steel strand, so as to ensure that the extrusion force on the steel strand remains stable, thereby increasing the scope of use of the device. After adjusting to the appropriate position, stop rotating the transition rod 51.

[0082] If a steel strand with a larger diameter is to be straightened, when the travel of the straightening roller 10 is adjusted (this paragraph is based on Fig.11Taking the moving direction of the parts as an example), the operator rotates the limit column on the driving frame 25, and the limit column loses contact with the connecting rod 23, so that the driving frame 25 can slide along the connecting rod 23, and then the operator rotates the limit rod 43, and the limit rod 43 loses contact with the transmission rod 41, thereby losing the limit on the transmission rod 41, and then the transmission rod 41 is moved to the right, and the transmission rod 41 drives all the limit members 42 thereon to move, and the limit members 42 are moved out of the slot of the driving frame 25, thereby losing the limit on the rotating seat 26.

[0083] After releasing the limit on the rotating seat 26, the operator moves the driving frame 25 to the left. At this time, the driving frame 25 slides relative to the rotating seat 26 on it, the rotating seat 26 slides backward, and the inclination angle of the limit frame 27 gradually increases, thereby reducing the movable distance of the sliding rod 28, thereby ensuring that the moving stroke of the straightening roller 10 corresponds to the diameter of the steel strand, thereby improving the use range of the device.

[0084] After the adjustment is completed, the operator rotates the limit column on the drive frame 25 so that the limit column squeezes the connecting rod 23 again, and the drive frame 25 is fixed. Then the operator pushes the transmission rod 41 so that the limit member 42 enters the slot of the drive frame 25 corresponding to the adjustment, and fixes the rotating seat 26 and the limit frame 27.

[0085] The above descriptions of adjusting the moving stroke and initial position of the straightening roller 10 are all performed separately. The description here is only an example. The two adjustments can be performed simultaneously, so that the device can adapt to different steel strands.

[0086] In all the above embodiments, the support ring 8 and the rotating frame 2 and the straightening roller 10 and the sliding sleeve 9 are fixedly connected. In the following embodiments, the support ring 8 and the rotating frame 2 are rotatably connected, and the straightening roller 10 and the sliding sleeve 9 are slidably connected, so as to facilitate the adjustment of the deflection angle of the straightening roller 10.

[0087] Embodiment 3: Based on embodiment 2, Figure 2 , Figure 3 , Figure 7 , Fig. 9 and Fig.12 As shown, it also includes: an angle adjustment mechanism, which has two, both are arranged on the rotating frame 2, for adjusting the deflection angle of adjacent support rings 8, the angle adjustment mechanism includes: a rotating rod 61, which is rotatably connected to the rotating frame 2; a support sleeve 62, which is threadedly connected to the rotating rod 61; a rack frame 63, which is slidably connected to the rotating frame 2 and fixedly connected to the support sleeve 62, all the support rings 8 in an adjacent group are connected to the rack frame 63 through gear transmission, and the support ring 8 is rotatably connected to the rotating frame 2.

[0088] like Figure 7 and Figure 8As shown, a baffle 71 is fixedly connected to the straightening roller 10 , and the straightening roller 10 is slidably connected to the sliding sleeve 9 , and a tension spring is arranged between the two. The sliding sleeve 9 is provided with a plurality of limiting grooves, and the limiting grooves on the sliding sleeve 9 are used to limit the baffle 71 .

[0089] In the above scheme, a method for uniformly adjusting the straightening rollers 10 is proposed to improve the efficiency of the device when in use; in this scheme, the two angle adjustment mechanisms are centrally symmetrically distributed to ensure the stability of the rotating frame 2 during rotation; the rack frame 63 is provided with four-section rack portions, which mesh with the gears on the adjacent support ring 8; each straightening roller 10 has a plurality of baffles 71 that are evenly distributed to ensure the stability of the connection between the straightening roller 10 and the sliding sleeve 9.

[0090] Working process: When straightening steel strands of different diameters, it is necessary to adjust the inclination angle of the straightening roller 10. The operator rotates the two rotating rods 61 in turn. The rotating rod 61 drives the supporting sleeve 62 to move under the action of the thread. The supporting sleeve 62 drives the rack 63 to move. The rack 63 drives the supporting ring 8 of the same group to deflect. The supporting ring 8 drives the straightening roller 10 to deflect through the sliding sleeve 9. After the deflection angle of the straightening roller 10 is adjusted to a suitable position, stop rotating the rotating rod 61. In this way, the preliminary adjustment of the deflection angle of the straightening roller 10 is completed.

[0091] After stopping the rotation of the rotating rod 61, the operator pulls all the straightening rollers 10 (the tension springs thereon store force) in turn, and the straightening rollers 10 slide along the sliding sleeve 9. The straightening rollers 10 drive the baffles 71 thereon to move until the baffles 71 move out of the limiting grooves on the sliding sleeve 9. The operator rotates the straightening rollers 10. At this time, the deflection angle of the straightening rollers 10 is adjusted separately. After the angle adjustment is completed, the operator releases the straightening rollers 10. The straightening rollers 10 are reset under the action of the tension and the baffles 71 enter the limiting grooves on the adjacent sliding sleeves 9. Through the above adjustment, the straightening rollers 10 are fully in contact with the steel strands, and the force applied to the steel strands is ensured to be more uniform, thereby improving the scope of application of the device.

[0092] Embodiment 4: Based on embodiment 3, Figure 3 and Figure 5 As shown, it also includes: a sliding frame 81 fixed to the telescopic end of the electric push rod 21, the sliding frame 81 is rotatably connected to the friction wheel 6, and the friction wheel 6 is spline-connected to the transmission shaft 5.

[0093] Working process: During the movement of the telescopic end of the electric push rod 21, the telescopic end of the electric push rod 21 drives the sliding frame 81 to move, and the sliding frame 81 drives the friction wheel 6 to move, so that the transmission ratio between the cone wheel 7 and the friction wheel 6 is reduced. During this process, the driving motor 3 drives the rotating frame 2 to reduce its rotation speed, so that the circumferential rotation speed of all straightening rollers 10 is reduced, that is, the speed of the straightening rollers 10 is gradually reduced during the separation from the steel strands, thereby reducing the wear of the straightening rollers 10 during the straightening process and increasing the service life of the device. After the telescopic end of the electric push rod 21 is reset, the sliding frame 81 returns to its original position.

[0094] The technical principles of the embodiments of the present invention are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention.

[0095] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A straightening device for prestressed steel strand production, characterized in that: The invention comprises a workbench (1), wherein the workbench (1) is rotatably connected to a rotating frame (2), a driving motor (3) is installed on the workbench (1), the rotating frame (2) is spline-connected to a spline sleeve (4), the workbench (1) is rotatably connected to a transmission shaft (5), the transmission shaft (5) and the spline sleeve (4) are connected via a pulley belt transmission, a friction wheel (6) is arranged on the transmission shaft (5), the output shaft of the driving motor (3) is fixedly connected to a cone wheel (7), the cone wheel (7) and the friction wheel (6) are connected via a pulley belt transmission. The rotating frame (2) is connected by friction transmission, and a plurality of supporting rings (8) are provided on the rotating frame (2), and all the supporting rings (8) are divided into two groups. The supporting rings (8) are spline-connected with sliding sleeves (9), and the sliding sleeves (9) are provided with straightening rollers (10). The sliding sleeves (9) are rotatably connected with the rotating frame (11). The workbench (1) is provided with a driving mechanism, and the driving mechanism is used to drive all the rotating frames (11) to move. The workbench (1) is provided with a detection mechanism, and the detection mechanism is used to detect the diameter of the steel strand.

2. A straightening device for prestressed steel strand production according to claim 1, characterized in that: The driving mechanism comprises an electric push rod (21), the electric push rod (21) is mounted on the workbench (1), the telescopic end of the electric push rod (21) is slidably connected to a connecting frame (22), the connecting frame (22) is slidably connected to the rotating frame (2), the connecting frame (22) is provided with two connecting rods (23), the rotating frame (2) is fixedly connected with two supporting rods (24), the supporting rods (24) are spline-connected with adjacent connecting rods (23), the connecting rods (23) are provided with a driving frame (25), the driving frame (25) is provided with rotating seats (26) whose number is the same as that in each group of supporting rings (8), the rotating seats (26) are rotatably connected to a limiting frame (27), the limiting frame (27) is slidably connected to a sliding rod (28), the sliding rod (28) is rotatably connected to the adjacent rotating frame (11), and the sliding rod (28) is slidably connected to the rotating frame (2).

3. A straightening device for prestressed steel strand production according to claim 2, characterized in that: The detection mechanism includes: A detection cylinder (31) is fixedly connected to the workbench (1); The sensing plates (32) have a plurality of pairs, each of which is rotatably connected to the detection tube (31), and a torsion spring is fixedly connected between the sensing plates (32) and the detection tube (31); A sliding ring (33) is slidably connected to the detection cylinder (31); a first spring is arranged between the sliding ring (33) and the detection cylinder (31); a plurality of driving rods (34) are slidably connected in the detection cylinder (31); the number of the driving rods (34) is the same as the number of the sensing plates (32); the driving rods (34) and the adjacent sensing plates (32) are driven by gear racks; the driving rods (34) are used to push the sliding ring (33) to move; A trigger component is arranged on the workbench (1) and is used to control the opening and closing of the electric push rod (21).

4. A straightening device for prestressed steel strand production according to claim 3, characterized in that: The trigger component includes: A first sleeve (35) is fixedly connected to the detection cylinder (31); the first sleeve (35) is slidably connected to a first block (351), and a second spring is arranged between the first sleeve (35) and the sliding ring (33) is used to push the first block (351) to move; an induction sleeve (36) fixedly connected to the workbench (1) and connected to the first sleeve (35); an alarm (37) installed on the workbench (1), a switch being arranged in the induction sleeve (36) for controlling the alarm (37) and the electric push rod (21); A limiting assembly is arranged on the detection cylinder (31) and is used to limit the position of the first block (351).

5. A straightening device for prestressed steel strand production according to claim 4, characterized in that: The limit assembly includes: The second sleeve (38) is fixedly connected in the detection tube (31); the second sleeve (38) is slidably connected with a second block (381), and a third spring is arranged between the two; the second block (381) is in extrusion contact with the sliding ring (33); a limiting telescopic rod (39) is fixedly connected to the first sleeve (35); the limiting telescopic rod (39) is connected with the second sleeve (38); the telescopic end of the limiting telescopic rod (39) passes through the first sleeve (35) and limits the first block (351).

6. A straightening device for prestressed steel strand production according to claim 2, characterized in that: Also included are: The total stroke adjustment mechanism has two components, which are respectively arranged on adjacent driving frames (25) and are used to adjust the relative position of the driving frame (25) and the rotating seat (26) thereon. The total stroke adjustment component includes: A transmission rod (41) is spline-connected to all the rotating seats (26) of the same driving frame (25); Limiting members (42), the number of which is the same as that of the supporting rings (8) in each group, and are all fixedly connected to the transmission rod (41), and the limiting members (42) are used to limit the positions of the adjacent rotating seats (26); A limiting rod (43) is threadedly connected to one of the rotating seats (26), the limiting rod (43) is in pressure contact with the transmission rod (41), the rotating seat (26) and the connecting rod (23) are both slidably connected to the driving frame (25), the driving frame (25) is threadedly connected to a limiting column, and the limiting column of the driving frame (25) is in pressure contact with the connecting rod (23).

7. A straightening device for prestressed steel strand production according to claim 6, characterized in that: Also included are: The transition rods (51) are provided with two and are respectively rotatably connected to the side of the adjacent connecting rod (23) away from the supporting rod (24). The transition rods (51) are threadedly connected to the connecting frame (22).

8. The straightening device for prestressed steel strand production according to claim 1, characterized in that: Also included are: There are two angle adjustment mechanisms, both of which are arranged on the rotating frame (2) and are used to adjust the deflection angle of the adjacent support ring (8), and the angle adjustment mechanism includes: A rotating rod (61) rotatably connected to the rotating frame (2); A supporting sleeve (62) threadedly connected to the rotating rod (61); The rack frame (63) is slidably connected to the rotating frame (2) and fixedly connected to the supporting sleeve (62); all the supporting rings (8) in an adjacent group are connected to the rack frame (63) through gear transmission; and the supporting rings (8) are rotatably connected to the rotating frame (2).

9. A straightening device for prestressed steel strand production according to claim 8, characterized in that: A baffle (71) is fixedly connected to the straightening roller (10), the straightening roller (10) is slidably connected to the sliding sleeve (9), and a tension spring is arranged between the two. The sliding sleeve (9) is provided with a plurality of limiting grooves, and the limiting grooves on the sliding sleeve (9) are used to limit the baffle (71).

10. A straightening device for prestressed steel strand production according to claim 2, characterized in that: Also included are: The sliding frame (81) is fixedly connected to the telescopic end of the electric push rod (21), the sliding frame (81) is rotationally connected to the friction wheel (6), and the friction wheel (6) is spline-connected to the transmission shaft (5).

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