An adjustable prestressed steel strand feeding device

Abstract

The present invention discloses an adjustable prestressed steel strand feeding device, which relates to the field of construction equipment, including a U-shaped support frame, a guide rod is welded and fixed on the top of the U-shaped support frame, a first screw rod is arranged at the top of the U-shaped support frame at one end of the guide rod, and a limiting mechanism for quickly limiting the outside of the steel strand is distributed on the top of the U-shaped support frame and the outside of the first screw rod. The present invention sets a limiting mechanism, and moves the positioning disk to a position with the same radius as the steel strand coil by rotating the first screw rod. In this process, the slider can drive the limiting rod to move toward the central axis of the positioning disk. When the positioning disk moves to the center of the steel strand coil, the limiting rod just fits with the outside of the steel strand coil, so as to limit the steel strand coil. The operation is simple, thereby improving the limiting efficiency of the steel strand coil and reducing the labor intensity of the staff.

Description

Technical Field

[0001] The invention relates to the field of construction equipment, in particular to an adjustable prestressed steel strand feeding device. Background Art

[0002] Prestressed steel strand is a twisted steel cable composed of 2, 3, 7 or 19 high-strength steel wires, and has been stress-relieved (stabilized). It is suitable for prestressed concrete and similar purposes. The main characteristics of prestressed steel strand are high strength and good relaxation performance. In addition, it is relatively straight when unfolded. The common tensile strength grade is 1860 MPa, and there are also strength grades such as 1720, 1770, 1960, 2000, and 2100 MPa. When unloading the prestressed steel strand in a coiled state, due to its greater toughness, when unwinding and pulling the coiled steel strand, it is necessary to use a fixed frame to block and limit the outside of the prestressed steel strand.

[0003] A general prestressed steel strand feeding fixing frame is composed of two end limit frames and multiple limit rods, which are connected by the limit rods. In the process, the staff needs to fix the limit rods connecting the end limit frames to the end limit frames by bolts, so as to achieve the connection between the end limit frames, so that they can limit the two ends of the steel strand coil, and then fix the other limit rods to the end limit frames by bolts, so that they fit with the outside of the steel strand coil, so as to limit the surrounding of the steel strand coil. In this process, the staff needs to fix the limit rods and the end limit frames by screwing the bolts one by one, which is cumbersome to operate, not only affecting the efficiency of limiting the steel strand, but also increasing the labor intensity of the staff. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable prestressed steel strand feeding device in order to solve the problem of inconvenience in quickly limiting the position of steel strand coils of different specifications.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable prestressed steel strand feeding device, comprising a U-shaped support frame, a guide rod is welded and fixed to the top of the U-shaped support frame, a first screw rod is arranged at the top of the U-shaped support frame at one end of the guide rod, a limiting mechanism for quickly limiting the outer side of the steel strand is distributed on the top of the U-shaped support frame and the outer side of the first screw rod, the limiting mechanism comprises a positioning plate sleeved on the outer side of the first screw rod, triangular connecting plates are arranged on both sides of the positioning plate, and support frames are welded and fixed to both sides of the triangular connecting plates;

[0006] One end of the triangular connecting plate is located on one side of the supporting frame and is provided with a shielding mechanism for limiting one end of the steel strand coil.

[0007] As a further scheme of the present invention: the limit mechanism also includes a limit block welded and fixed to one end of the positioning plate and sleeved on the outside of the guide rod, the inner side of the triangular connecting plate is provided with a second screw rod that penetrates to the outside of the triangular connecting plate, the bottom end of the second screw rod is provided with a fourth bevel gear located on the inner side of the triangular connecting plate, the top end of the second screw rod is welded and fixed with a first bevel gear, one end of the U-shaped support frame is located on one side of the guide rod and is welded and fixed with a spur rack, one end of the triangular connecting plate is rotatably connected to a spur gear located on one side of the spur rack through a rotating shaft, one end of the rotating shaft connected with the spur gear and the triangular connecting plate is provided with a fifth bevel gear located on the inner side of the triangular connecting plate and meshed with the fourth bevel gear, the outer side of the second screw rod is sleeved with a slider, one end of the slider is welded and fixed with a limit rod, and the end of the limit rod away from the slider is provided with a support assembly.

[0008] As a further solution of the present invention: a threaded hole matching the outer side of the first screw rod is provided on the inner side of the positioning plate, a scale line is provided on the outer side of the guide rod, the outer side of the spur gear is meshed with one side of the spur rack, the circumference of the spur gear is equal to the pitch of the first screw rod, the fourth bevel gear and the fifth bevel gear are equal in diameter, and the pitch of the outer thread of the second screw rod is equal to the pitch of the outer thread of the first screw rod.

[0009] As a further solution of the present invention: the support assembly includes a connecting rod arranged on the top of the support frame, second bevel gears are welded and fixed at both ends of the connecting rod, one end of the support frame is rotatably connected to a third screw rod through a bearing, one end of the limit rod is welded and fixed with a sleeve block sleeved on the outside of the third screw rod, and the top end of the third screw rod is welded and fixed with a third bevel gear meshing with the second bevel gear.

[0010] As a further solution of the present invention: the second bevel gear is meshed with the outer side of the first bevel gear, the inner side of the sleeve block is provided with a threaded hole matching the outer side of the third screw rod, the pitch of the outer thread of the third screw rod is the same as the pitch of the outer thread of the second screw rod, and the outer thread of the third screw rod is in opposite direction to the outer thread of the second screw rod.

[0011] As a further scheme of the present invention: the shielding mechanism includes a guide rail sleeved on the outside of the limit rod, an end face limit plate is provided on one side of the guide rail, and limit racks are welded and fixed on both sides of the end face limit plate and penetrate through one end of the triangular connecting plate, one end of the triangular connecting plate is provided with a positioning pin located above the limit rack, and a second telescopic spring is sleeved on the outside of the positioning pin, and a pressure plate is provided at one end of the end face limit plate and penetrates through the other end of the end face limit plate, and a U-shaped positioning frame is provided at one end of the pressure plate and is located at one end of the end face limit plate, and a first telescopic spring is provided at one end of the end face limit plate and is located on the inner side of the U-shaped positioning frame, and a positioning block is welded and fixed to the bottom of the third screw rod, and a positioning hole is provided on the inner side of the positioning block that matches with one end of the U-shaped positioning frame.

[0012] As a further solution of the present invention: a ball is provided at the bottom of the positioning pin, the bottom of the positioning pin fits with the tooth groove at the top of the limiting rack, the two ends of the first telescopic spring are respectively welded and fixed to one end of the U-shaped positioning frame and one end of the end face limiting plate, and the inner wall of the guide rail fits with the limiting rod.

[0013] As a further solution of the present invention: the number of the triangular connecting plates is set to two, and the two triangular connecting plates are symmetrically arranged along the vertical center axis of the positioning plate, and two second screw rods are arranged in the triangular connecting plate, and the two second screw rods are symmetrically arranged along the horizontal center axis of the triangular connecting plate.

[0014] As a further solution of the present invention: the central axis of the positioning plate is in an overlapping state with the central axis of the end surface limiting plate, and a through hole larger than the diameter of the positioning plate is provided on the inner side of the end surface limiting plate.

[0015] As a further solution of the present invention: the width of the U-shaped support frame is equal to the farthest distance between the triangular connecting plates on both sides of the positioning plate, and the length of the U-shaped support frame is equal to the farthest distance between the end face limit plate and the central axis of the first screw rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the limiting mechanism and the shielding mechanism, when using the device, the device can be buckled on the outside of the steel strand coil first, and then the two ends of the steel strand coil are limited by the cooperation between the shielding mechanism and the positioning plate, and then the limiting mechanism is limited on the outside of the steel strand coil by rotating the first screw rod, so as to prevent the steel strand coil from being scattered during unloading, which is simple to operate and reduces the labor intensity of the staff;

[0018] 2. By setting up a shielding mechanism, the staff can limit the end face of the steel strand coil by pushing the end face limit plate. When the pressure plate contacts the steel strand coil, the pressure plate will be squeezed as the end face limit plate moves, so that the third screw rod in the support assembly loses its limit, thereby preventing the outer side of the steel strand coil from being limited when the steel strand coil is not limited in the front and rear directions, thereby increasing the stability of the equipment's limit on the steel strand coil and also improving a certain degree of safety;

[0019] 3. By setting a limiting mechanism, the positioning disk is moved to a position with the same radius as the steel strand coil by rotating the first screw rod. In this process, the slider can drive the limiting rod to move toward the central axis of the positioning disk. When the positioning disk moves to the center of the steel strand coil, the limiting rod just fits with the outer side of the steel strand coil, thereby limiting the steel strand coil. The operation is simple, thereby improving the limiting efficiency of the steel strand coil and reducing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 is a side view of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged view of point C in the middle;

[0024] Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle;

[0025] Figure 6 A partial cross-sectional view of a triangular connecting plate of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point D in the middle;

[0027] Figure 8 It is a schematic structural diagram of the end surface limiting plate of the present invention.

[0028] In the figure: 1, U-shaped support frame; 2, guide rod; 3, first screw rod; 4, limiting mechanism; 401, positioning plate; 402, triangular connecting plate; 403, spur rack; 404, limiting rod; 405, second screw rod; 406, first bevel gear; 407, support frame; 408, connecting rod; 409, second bevel gear; 410, third bevel gear; 411, third screw rod; 412, sleeve block; 413, spur gear; 414, limiting block; 415, slider; 416, fourth bevel gear; 417, fifth bevel gear; 5, shielding mechanism; 501, end face limiting plate; 502, pressure plate; 503, U-shaped positioning frame; 504, limiting rack; 505, guide rail; 506, positioning block; 507, first telescopic spring; 508, positioning pin; 509, second telescopic spring; 510, positioning hole. DETAILED DESCRIPTION

[0029] 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.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0031] See also Figures 1 to 8In an embodiment of the present invention, an adjustable prestressed steel strand feeding device comprises a U-shaped support frame 1, a guide rod 2 is welded and fixed on the top of the U-shaped support frame 1, a first screw rod 3 is arranged at the top of the U-shaped support frame 1 at one end of the guide rod 2, a limiting mechanism 4 for quickly limiting the outer side of the steel strand is distributed on the top of the U-shaped support frame 1 and the outer side of the first screw rod 3, the limiting mechanism 4 comprises a positioning plate 401 sleeved on the outer side of the first screw rod 3, triangular connecting plates 402 are arranged on both sides of the positioning plate 401, and support frames 407 are welded and fixed on both sides of the triangular connecting plate 402;

[0032] One end of the triangular connecting plate 402 is located on one side of the support frame 407 and is provided with a shielding mechanism 5 for limiting one end of the steel strand roll.

[0033] In this embodiment, when using the device, the device can be first buckled on the outside of the steel strand roll, and then the two ends of the steel strand roll are limited by the cooperation between the shielding mechanism 5 and the positioning plate 401, and then the limiting mechanism 4 is limited to the outside of the steel strand roll by rotating the first screw rod 3, so as to prevent the steel strand roll from being scattered during unloading. The operation is simple and the labor intensity of the staff is also reduced.

[0034] Please refer to Figure 1 , 3 , 5, 6, 7, the limiting mechanism 4 also includes a limiting block 414 welded and fixed to one end of the positioning plate 401 and sleeved on the outside of the guide rod 2, the inner side of the triangular connecting plate 402 is provided with a second screw rod 405 that penetrates to the outside of the triangular connecting plate 402, the bottom end of the second screw rod 405 is provided with a fourth bevel gear 416 located on the inner side of the triangular connecting plate 402, the top end of the second screw rod 405 is welded and fixed with the first bevel gear 406, one end of the U-shaped support frame 1 is located on one side of the guide rod 2 and is welded and fixed with a straight Rack 403, one end of the triangular connecting plate 402 is rotatably connected to a spur gear 413 located on one side of the spur rack 403 through a rotating shaft, one end of the rotating shaft connecting the spur gear 413 and the triangular connecting plate 402 is provided with a fifth bevel gear 417 located on the inner side of the triangular connecting plate 402 and meshing with the fourth bevel gear 416, a slider 415 is sleeved on the outer side of the second screw rod 405, one end of the slider 415 is welded and fixed to a limiting rod 404, and a support assembly is provided at the end of the limiting rod 404 away from the slider 415.

[0035] In this embodiment, when using the device, the device can be first buckled on the outside of the steel strand coil from the top of the steel strand coil, so that it passes through the U-shaped support frame 1 and moves to one side of the positioning plate 401, and then the two ends of the steel strand coil are limited by the shielding mechanism 5, and then the first screw rod 3 is rotated. At this time, the positioning plate 401 will move along the first screw rod 3 under the limitation of the guide rod 2. At this time, observe the scale line on the outside of the guide rod 2. The number marked on the scale line on the guide rod 2 is the distance from that place to the bottom of the U-shaped support frame 1. Since the steel strand coil is placed on the ground, the radius of the steel strand coil at this time is the distance between the center of the steel strand coil and the ground. Therefore, the position of the positioning plate 401 can be adjusted according to the radius of the steel strand coil, so as to move the positioning plate 401 to the same horizontal height as the central axis of the steel strand coil. During the process of the positioning plate 401 moving relative to the first screw rod 3 The middle spur gear 413 will rotate along the spur rack 403, so that the fifth bevel gear 417 can drive the second screw rod 405 to rotate through the fourth bevel gear 416 through the rotation of the spur gear 413, so that the second screw rod 405 and the first screw rod 3 rotate in the same number of circles, so that the distance moved by the slider 415 relative to the triangular connecting plate 402 is equal to the distance moved by the positioning plate 401, so that the distance between the slider 415 and the central axis of the positioning plate 401 and the distance between the positioning plate 401 and the bottom of the U-shaped support frame 1 can be equal, so that when the positioning plate 401 moves to the center of the steel strand coil, the limit rod 404 just fits with the outer side of the steel strand coil, so that the steel strand coil can be limited. The operation is simple in this process, so as to increase the limiting efficiency of the equipment for the steel strand coil, and provide convenience for the subsequent unloading of the steel strand coil.

[0036] Please refer to Figure 3 , 5 , 6, 7, a threaded hole matching the outer side of the first screw rod 3 is provided on the inner side of the positioning plate 401, a scale line is provided on the outer side of the guide rod 2, the outer side of the spur gear 413 is meshed with one side of the spur rack 403, the circumference of the spur gear 413 is equal to the pitch of the first screw rod 3, the fourth bevel gear 416 and the fifth bevel gear 417 are equal in diameter, and the outer thread pitch of the second screw rod 405 is equal to the outer thread pitch of the first screw rod 3.

[0037] In this embodiment, this structure is set to enable the positioning disk 401 to move upward or downward along the first screw rod 3 when the first screw rod 3 rotates, so that the central axis of the positioning disk 401 coincides with the central axis of the steel wire coil, and in the process of the positioning disk 401 moving along the first screw rod 3, the spur gear 413 will rotate along the spur rack 403, so that the rotation of the spur gear 413 can drive the fifth bevel gear 417 to rotate the second screw rod 405 through the fourth bevel gear 416, so that the distance moved by the slider 415 relative to the triangular connecting plate 402 is equal to the distance moved by the positioning disk 401.

[0038] Please refer to Figure 1 , 3 The support assembly includes a connecting rod 408 arranged on the top of the support frame 407, and the second bevel gears 409 are welded and fixed at both ends of the connecting rod 408. One end of the support frame 407 is rotatably connected to the third screw rod 411 through a bearing, and one end of the limiting rod 404 is welded and fixed with a sleeve block 412 sleeved on the outside of the third screw rod 411, and the top of the third screw rod 411 is welded and fixed with a third bevel gear 410 meshing with the second bevel gear 409.

[0039] In this embodiment, when the first bevel gear 406 rotates, the connecting rod 408 can be rotated through the second bevel gear 409. In this process, the third bevel gear 410 at the top of the third screw rod 411 can be driven to rotate by the second bevel gear 409 at the other end of the connecting rod 408, so that the third screw rod 411 can be rotated, so that the sleeve block 412 moves with the movement of the limit rod 404, so that the slider 415 and the sleeve block 412 cooperate with the second screw rod 405 and the third screw rod 411 to support and limit the two ends of the limit rod 404, thereby increasing the stability of the limit rod 404 and providing convenience for the limit rod 404 to limit the outside of the steel wire coil.

[0040] Please refer to Figure 1 , 3 The second bevel gear 409 is meshed with the outer side of the first bevel gear 406, and a threaded hole matching the outer side of the third screw rod 411 is provided on the inner side of the sleeve block 412. The pitch of the outer thread of the third screw rod 411 is the same as the pitch of the outer thread of the second screw rod 405, and the outer thread of the third screw rod 411 is in opposite direction to the outer thread of the second screw rod 405.

[0041] In this embodiment, by setting this structure, when the first bevel gear 406 rotates, the connecting rod 408 and the third bevel gear 410 are rotated through the second bevel gear 409, so that the third screw rod 411 rotates with the rotation of the third bevel gear 410, so that the sleeve block 412 can move in the same direction as the moving direction of the slider 415, thereby increasing the stability of the movement of the limit rod 404.

[0042] Please refer to Figure 1 , 2 , 3, 4, 8, the shielding mechanism 5 includes a guide rail 505 sleeved on the outside of the limiting rod 404, an end surface limiting plate 501 is provided on one side of the guide rail 505, and a limiting rack 504 penetrating to one end of the triangular connecting plate 402 is welded and fixed on both sides of the end surface limiting plate 501, and a positioning pin 508 located above the limiting rack 504 is provided at one end of the triangular connecting plate 402, and a second telescopic spring 509 is sleeved on the outside of the positioning pin 508. One end of 01 is provided with a pressure plate 502 which passes through to the other end of the end limit plate 501, one end of the pressure plate 502 is provided with a U-shaped positioning frame 503 located at one end of the end limit plate 501, one end of the end limit plate 501 is provided with a first telescopic spring 507 located on the inner side of the U-shaped positioning frame 503, and a positioning block 506 is welded and fixed to the bottom of the third screw rod 411, and a positioning hole 510 which matches with one end of the U-shaped positioning frame 503 is opened on the inner side of the positioning block 506.

[0043] In this embodiment, when limiting the two ends of the steel strand coil, the end limit plate 501 can be pushed first. During the process, the end limit plate 501 will drive the limit rack 504 to move, so that the limit rack 504 moves in the direction of the positioning plate 401. At this time, the positioning pin 508 will rise under the action of the inclined surface of the card tooth on the limit rack 504, and at the same time, the second telescopic spring 509 will stretch. When the inclined surface of the card tooth separates from the positioning pin 508 as the limit rack 504 moves, the positioning pin 508 will be buckled into the tooth groove at the top of the limit rack 504 under the action of the vertical surface of the card tooth at the top of the limit rack 504. At this time, the positioning pin 508 can limit the limit rack 504 under the action of the vertical surface of the card tooth at the top of the limit rack 504. The limiting rack 504 can only move in one direction under the limitation of the positioning pin 508. As the end limit plate 501 is pushed, the distance between the end limit plate 501 and the positioning plate 401 can be adjusted. When the pressure plate 502 contacts the steel wire coil as the end limit plate moves, the pressure plate 502 will be squeezed. At this time, the first telescopic spring 507 is extended. During this process, one end of the U-shaped positioning frame 503 is separated from the positioning hole 510 on the positioning block 506, so that the third screw rod 411 loses its limitation, thereby providing convenience for the subsequent limitation of the outer side of the steel wire coil by the equipment, and also preventing the outer side of the steel wire coil from being limited when the end face of the steel wire coil is not completely limited, thereby increasing the stability of the equipment in limiting the steel wire coil.

[0044] Please refer to Figure 1 , 3 4. A ball is provided at the bottom of the positioning pin 508, and the bottom of the positioning pin 508 fits with the tooth groove at the top of the limiting rack 504. The two ends of the first telescopic spring 507 are respectively welded and fixed to one end of the U-shaped positioning frame 503 and one end of the end surface limiting plate 501, and the inner wall of the guide rail 505 fits with the limiting rod 404.

[0045] In this embodiment, this structure is provided to reduce the friction between the positioning pin 508 and the top latching tooth of the limiting rack 504. At the same time, when the limiting rack 504 moves toward the positioning disk 401, the positioning pin 508 will rise under the action of the inclined surface of the latching tooth on the limiting rack 504. When the inclined surface of the latching tooth separates from the positioning pin 508 as the limiting rack 504 moves, the positioning pin 508 will be buckled into the tooth groove at the top of the limiting rack 504 under the action of the second telescopic spring 509. At this time, under the action of the vertical surface of the latching tooth at the top of the limiting rack 504, the positioning pin 508 can limit the limiting rack 504. In this way, the limiting rack 504 can only move in one direction under the limitation of the positioning pin 508.

[0046] Please refer to Figure 1 , 3There are two triangular connecting plates 402 symmetrically arranged along the vertical center axis of the positioning plate 401 , and two second screw rods 405 are arranged in the triangular connecting plate 402 symmetrically arranged along the horizontal center axis of the triangular connecting plate 402 .

[0047] In this embodiment, this structure is provided to increase the limiting range of the steel wire coil by the limiting rod 404, so that a plurality of limiting rods 404 simultaneously move toward and disperse toward the central axis of the positioning plate 401, thereby enabling the limiting rods 404 to block and limit different positions on the outside of the steel wire coil, thereby increasing the stability of the equipment in limiting the steel wire coil.

[0048] Please refer to Figure 1 , 3 The central axis of the positioning disk 401 is in an overlapping state with the central axis of the end surface limiting disk 501 , and a through hole larger than the diameter of the positioning disk 401 is provided on the inner side of the end surface limiting disk 501 .

[0049] In this embodiment, by setting up this structure, one end of the steel strand can be pulled out through the through hole on the inner side of the end limit plate 501, so as to achieve the effect of guiding the steel strand. At the same time, in conjunction with the limiting mechanism 4, the central axis of the end limit plate 501 can be made to coincide with the central axis of the steel strand roll, thereby providing convenience for the unloading of the steel strand.

[0050] Please refer to Figure 1 The width of the U-shaped support frame 1 is equal to the maximum distance between the triangular connecting plates 402 on both sides of the positioning plate 401, and the length of the U-shaped support frame 1 is equal to the maximum distance between the end surface limiting plate 501 and the central axis of the first screw rod 3.

[0051] In this embodiment, this structure is provided to increase the placement space inside the device, thereby providing convenience for the device to be buckled onto the outside of the steel strand coil from above the steel strand coil.

[0052] The working principle of the present invention is as follows: when using the device, the device can be first buckled on the outside of the steel strand coil from the top of the steel strand coil, so that it is located between the positioning disk 401 and the end limit disk 501, and then the end limit disk 501 is pushed. During the process, the end limit disk 501 will drive the limit rack 504 to move, so that the limit rack 504 moves toward the direction of the positioning disk 401. At this time, the positioning pin 508 will rise under the action of the inclined surface of the locking tooth on the limit rack 504, and the second telescopic spring 509 will stretch. When the inclined surface of the locking tooth separates from the positioning pin 508 as the limiting rack 504 moves, the positioning pin 508 will buckle under the action of the second telescopic spring 509. When the limit rack 504 is inserted into the tooth groove at the top of the limit rack 504, the positioning pin 508 can limit the limit rack 504 under the action of the vertical surface of the card tooth at the top of the limit rack 504. In this way, the limit rack 504 can only move in one direction under the limitation of the positioning pin 508. When the pressure plate 502 contacts the steel strand coil with the movement of the end limit disk, the pressure plate 502 will be squeezed. At this time, the first telescopic spring 507 will extend. During this process, one end of the U-shaped positioning frame 503 is separated from the positioning hole 510 on the positioning block 506. In this way, the third screw rod 411 can lose its limit. Then the first screw rod 3 is rotated. At this time, the positioning disk 401 will move along the first The screw rod 3 moves, and at this time, the scale line on the outer side of the guide rod 2 is observed. The number engraved on the scale line on the guide rod 2 is the distance from that place to the bottom of the U-shaped support frame 1. Since the steel strand coil is placed on the ground, the radius of the steel strand coil is the distance between the center of the steel strand coil and the ground. Therefore, the position of the positioning plate 401 can be adjusted according to the radius of the steel strand coil, so as to move the positioning plate 401 to the same horizontal height as the central axis of the steel strand coil. In the process of the positioning plate 401 moving relative to the first screw rod 3, the spur gear 413 will rotate along the spur rack 403, so that the fifth bevel gear 417 can be driven by the fourth bevel gear 416 through the rotation of the spur gear 413 The second screw rod 405 is driven to rotate, so that the number of turns of the second screw rod 405 and the first screw rod 3 are relative, so that the distance moved by the slider 415 relative to the triangular connecting plate 402 is equal to the distance moved by the positioning plate 401, so that the distance between the slider 415 and the central axis of the positioning plate 401 and the distance between the positioning plate 401 and the bottom of the U-shaped support frame 1 can be equal, so that when the positioning plate 401 moves to the center of the steel strand coil, the limit rod 404 is just in contact with the outer side of the steel strand coil, so that the steel strand coil can be limited. The operation in this process is simple, so as to increase the equipment's limiting efficiency for the steel strand coil, and provide convenience for the subsequent unloading of the steel strand coil.

[0053] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable prestressed steel strand feeding device, comprising a U-shaped support frame (1), a guide rod (2) being welded and fixed to the top of the U-shaped support frame (1), a first screw rod (3) being arranged at one end of the guide rod (2) at the top of the U-shaped support frame (1), characterized in that: A limiting mechanism (4) for quickly limiting the outer side of the steel strand is provided on the top of the U-shaped support frame (1) and on the outer side of the first screw rod (3); the limiting mechanism (4) comprises a positioning plate (401) sleeved on the outer side of the first screw rod (3); triangular connecting plates (402) are provided on both sides of the positioning plate (401); and support frames (407) are welded and fixed on both sides of the triangular connecting plates (402); One end of the triangular connecting plate (402) is located on one side of the supporting frame (407) and is provided with a shielding mechanism (5); The limiting mechanism (4) further comprises a limiting block (414) which is welded and fixed to one end of the positioning plate (401) and sleeved on the outside of the guide rod (2); a second screw rod (405) which penetrates to the outside of the triangular connecting plate (402) is arranged on the inner side of the triangular connecting plate (402); a fourth bevel gear (416) which is located on the inner side of the triangular connecting plate (402) is arranged at the bottom end of the second screw rod (405); a first bevel gear (406) is welded and fixed to the top end of the second screw rod (405); and a straight rack (416) is welded and fixed to one end of the U-shaped support frame (1) which is located on one side of the guide rod (2). 03), one end of the triangular connecting plate (402) is rotatably connected to a spur gear (413) located on one side of the spur rack (403) through a rotating shaft, one end of the rotating shaft connecting the spur gear (413) and the triangular connecting plate (402) is provided with a fifth bevel gear (417) located on the inner side of the triangular connecting plate (402) and meshing with the fourth bevel gear (416), a slider (415) is sleeved on the outer side of the second screw rod (405), a limiting rod (404) is welded and fixed to one end of the slider (415), and a support assembly is provided at one end of the limiting rod (404) away from the slider (415); The support assembly comprises a connecting rod (408) arranged at the top of the support frame (407), and second bevel gears (409) are welded and fixed at both ends of the connecting rod (408); one end of the support frame (407) is rotatably connected to a third screw rod (411) via a bearing; one end of the limit rod (404) is welded and fixed with a sleeve block (412) sleeved on the outside of the third screw rod (411); and the top end of the third screw rod (411) is welded and fixed with a third bevel gear (410) meshing with the second bevel gear (409); The second bevel gear (409) is meshed with the outer side of the first bevel gear (406); the inner side of the sleeve block (412) is provided with a threaded hole matching the outer side of the third screw rod (411); the pitch of the outer thread of the third screw rod (411) is the same as the pitch of the outer thread of the second screw rod (405); and the outer thread of the third screw rod (411) is in opposite direction to the outer thread of the second screw rod (405); The shielding mechanism (5) comprises a guide rail (505) sleeved on the outside of the limiting rod (404); an end surface limiting plate (501) is provided on one side of the guide rail (505); limiting racks (504) penetrating to one end of the triangular connecting plate (402) are welded and fixed on both sides of the end surface limiting plate (501); a positioning pin (508) located above the limiting rack (504) is provided at one end of the triangular connecting plate (402); a second telescopic spring (509) is sleeved on the outside of the positioning pin (508); and the end surface limiting plate (501) is provided with a plurality of springs. A pressure plate (502) is provided at one end thereof and passes through the other end of the end surface limiting plate (501); a U-shaped positioning frame (503) located at one end of the end surface limiting plate (501) is provided at one end of the pressure plate (502); a first telescopic spring (507) located inside the U-shaped positioning frame (503) is provided at one end of the end surface limiting plate (501); a positioning block (506) is welded and fixed at the bottom of the third screw rod (411); a positioning hole (510) is provided on the inner side of the positioning block (506) and is matched with one end of the U-shaped positioning frame (503); A ball bearing is provided at the bottom of the positioning pin (508), and the bottom of the positioning pin (508) is matched with the tooth groove at the top of the limiting rack (504). The two ends of the first telescopic spring (507) are respectively welded and fixed to one end of the U-shaped positioning frame (503) and one end of the end surface limiting plate (501), and the inner wall of the guide rail (505) is in contact with the limiting rod (404).

2. The adjustable prestressed steel strand feeding device according to claim 1 is characterized in that: The inner side of the positioning plate (401) is provided with a threaded hole matching the outer side of the first screw rod (3); the outer side of the guide rod (2) is provided with a scale line; the outer side of the spur gear (413) is meshed with one side of the spur rack (403); the circumference of the spur gear (413) is equal to the pitch of the first screw rod (3); the diameters of the fourth bevel gear (416) and the fifth bevel gear (417) are equal; and the pitch of the outer thread of the second screw rod (405) is equal to the pitch of the outer thread of the first screw rod (3).

3. The adjustable prestressed steel strand feeding device according to claim 1 is characterized in that: The number of the triangular connecting plates (402) is two, and the two triangular connecting plates (402) are symmetrically arranged along the vertical center axis of the positioning plate (401), and two second screw rods (405) are arranged in the triangular connecting plate (402), and the two second screw rods (405) are symmetrically arranged along the transverse center axis of the triangular connecting plate (402).

4. The adjustable prestressed steel strand feeding device according to claim 1, characterized in that: The central axis of the positioning disk (401) is in an overlapping state with the central axis of the end surface limiting disk (501), and a through hole having a diameter larger than that of the positioning disk (401) is provided on the inner side of the end surface limiting disk (501).

5. The adjustable prestressed steel strand feeding device according to claim 1, characterized in that: The width of the U-shaped support frame (1) is equal to the maximum distance between the triangular connecting plates (402) on both sides of the positioning plate (401), and the length of the U-shaped support frame (1) is equal to the maximum distance between the end surface limiting plate (501) and the central axis of the first screw rod (3).

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