Multifunctional prestressed tendon pulling machine

Abstract

The invention discloses a multifunctional prestressed tendon pulling machine, and belongs to the technical field of building pulling machines, the multifunctional prestressed tendon pulling machine comprises a pulling rack, a plurality of pulling wheels are arranged on the two sides in a threading cavity of the pulling rack, the pulling wheels are connected with a driving motor through a gearbox, and the driving motor is connected to one side of the exterior of the pulling rack; prestressed tendons are driven to be transmitted through rotation of the strand pulling wheel, and a buffering mechanism is arranged at a wire outlet of the strand pulling machine frame. In the invention, the rotation of the output shaft of the rotating motor can drive the driving gear to rotate, the rotation of the driving gear can drive the gear ring and the front guide seat to rotate to adjust the circumferential angle, and the adjustment of the circumferential angle of the guide seat is matched with the adjustment of the radial position, so that the guide position of the guide sleeve can be fully adjusted within the range of the gear ring; after a single prestressed tendon is perforated, the next prestressed tendon can be quickly guided to the adjacent position, the prestressed tendons can be quickly arranged and guided in a strand penetrating hole, the perforating tightness is improved, and subsequent tensioning control is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building threading machine, and particularly relates to a multifunctional prestressed tendon threading machine. BACKGROUND

[0002] The threading machine, also known as a steel strand threading machine, a threading machine or a pipe threading machine, is an engineering equipment for steel strand threading in the prestressed construction of bridge, high-speed rail prefabricated beam and large building. It realizes conveying by mechanical transmission and roller clamping steel strand, supports stepless speed regulation and bidirectional operation.

[0003] A steel strand threading machine is disclosed in Chinese patent for invention with authorized announcement number (publication number) CN105780656B, which comprises a rack, a motor, a belt pulley mechanism, a gearbox and a steel strand guide groove. The motor, the belt pulley mechanism and the gearbox are arranged on the rack. One end of the belt pulley mechanism is connected with the motor, and the other end is connected with the gearbox. The steel strand guide groove is arranged at the front end of the gearbox. The belt pulley mechanism comprises a belt pulley mechanism shell, a belt and a belt pulley. The gearbox comprises a gearbox shell, a driving shaft, an intermediate shaft, a first transmission shaft, a second transmission shaft, a third transmission shaft, a transmission gear shaft, a variable-gear shift pull fork, a pressure roller assembly, a rotation number encoder and a strand wheel. The pressure roller assembly comprises two pressure rollers arranged in front and back, pressure roller left and right fixing plates, pressure roller upper and lower slides, a pressure roller pressure input shaft, an input shaft inclined block, a pressure adjustment shaft and a pressure inclined block. However, in actual use, a plurality of prestressed tendons are generally stacked in a single threading hole. The traditional threading machine can only thread in the same direction by applying force through the traction wheel during threading, which causes interference between the prestressed tendons during multiple threading, affects the threading positioning accuracy, and depends on the self-weight stacking of the prestressed tendons for the adjustment of multiple prestressed tendons in a single hole, which affects the uniformity of arrangement and has room for improvement. SUMMARY

[0004] The present application aims to solve the problem of interference between prestressed tendons in a single threading hole during multiple threading, which affects the threading positioning accuracy, and proposes a multifunctional prestressed tendon threading machine.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A multifunctional prestressed tendon threading machine comprises a threading rack. A plurality of threading wheels are arranged on both sides of the threading cavity. The threading wheels are connected with a driving motor through a gear box. The driving motor is connected to one side outside the threading rack. The prestressed tendon is transmitted by rotating the threading wheels. A buffer mechanism is arranged at the outlet of the threading rack. A rotary drive assembly is installed on the front side of the buffer mechanism. A guide mechanism is rotatably installed on the rotary drive assembly. A positioning ring is installed on the rear side of the rotary drive assembly. A control mechanism is installed on one side of the positioning ring. The control mechanism is connected to the front side of the outlet of the threading rack.

[0007] The guiding mechanism includes a guide sleeve configured to move radially along a rotary drive assembly, which rotates the guide sleeve at the cable outlet of the cable threading frame to fully fill the cable threading hole.

[0008] As a further description of the above technical solution:

[0009] The rotary drive assembly includes a gear ring, which is rotatably connected to one side of the positioning ring via a bearing. A drive gear is meshed on one side of the gear ring, and a rotary motor is mounted on one side of the drive gear. The rotary motor is connected to the outside of the positioning ring.

[0010] As a further description of the above technical solution:

[0011] The control mechanism includes a hydraulic cylinder, which is connected to the outside of the shield via a mounting component. One end of the piston rod of the hydraulic cylinder is connected to a connecting block, and the bottom of the connecting block is connected to a connecting clamp, which is connected to the outside of the positioning ring.

[0012] As a further description of the above technical solution:

[0013] The guiding mechanism includes a guide seat, which is connected to one side of a toothed ring at a corresponding position via a connector. A connecting plate is connected to one side of the inner cavity of the guide seat. A lead screw seat is rotatably connected to the top of the connecting plate via a bearing. An adjusting lead screw is driven through the lead screw seat. A fixing plate is connected to one end of the adjusting lead screw. The fixing plate is connected to the outside of the guide sleeve. A lead screw drive unit is driven through the lead screw seat. The guide sleeve is moved and pulled by the sleeved lead screw.

[0014] As a further description of the above technical solution:

[0015] Guide rods are connected to both sides of the top of the fixed plate, and the top of the guide rods passes through the guide holes opened at corresponding positions of the connecting plate and the guide seat in sequence.

[0016] As a further description of the above technical solution:

[0017] The buffer mechanism includes a fixed ring, which is connected to the side of the positioning ring near the threading frame. The inner cavity of the fixed ring is provided with a movable guide ring, and the guiding direction is adjusted by moving the guide ring within the fixed ring.

[0018] The design of the fixing ring, which is connected to the positioning ring, can improve the stability of the inner guide ring device and help avoid the stress of the prestressed tendons affecting the threading stability during the guiding process.

[0019] As a further description of the above technical solution:

[0020] A rotating sleeve is connected around the outer periphery of the guide ring along the axis. A sliding groove is opened through one side of the rotating sleeve, and a sliding rod is slidably connected in the sliding groove. A first rotating block is connected to the outside of the sliding rod. A telescopic rod is connected to one side of the first rotating block, and a second rotating block is connected to the other end of the telescopic rod. A fixed seat is rotatably connected to the outside of the second rotating block. The fixed seat is connected to a corresponding position on one side of the inner cavity of the fixed ring. A first spring is sleeved on the outside of the telescopic rod, and the two ends of the first spring are respectively connected to the opposite side of the first rotating block and the second rotating block.

[0021] As a further description of the above technical solution:

[0022] The inner cavity of the guide ring is fitted with multiple universal bearings along the axis, and guide balls are rotatably connected inside the universal bearings.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In this invention, when the prestressing tendon is inserted into the prestressing tendon through the prestressing tendon insertion machine frame, the drive motor can drive the prestressing tendon into the prestressing tendon insertion hole side by rotating the prestressing tendon insertion wheel. When inserting multiple tendons into the prestressing tendon insertion hole, the adjusting screw can pull the guide sleeve to move through the bottom fixing plate. The movement of the guide sleeve can adjust the radial position of the internal wire harness relative to the corresponding prestressing tendon insertion hole. At the same time, the rotation of the output shaft of the rotating motor can drive the drive gear to rotate. The rotation of the drive gear can drive the gear ring and the front guide seat to rotate and adjust the circumferential angle. By adjusting the circumferential angle of the guide seat in conjunction with the adjustment of the radial position, the guiding position of the guide sleeve can be fully adjusted within the range of the gear ring. This facilitates the rapid guidance of the next prestressing tendon to the adjacent position after the single prestressing tendon insertion is completed. This is beneficial for the rapid arrangement and guidance of the prestressing tendons in the prestressing tendon insertion hole, improves the tightness of the insertion, and facilitates subsequent tension control.

[0025] 2. In this invention, through the designed buffer mechanism, when the prestressing tendon is threaded, it can extend into the guide ring. At this time, the guide ring can rotate through the internal guide ball to reduce the threading friction. When the front guide sleeve adjusts the guiding position, the tension on the rear side of the prestressing tendon can pull the guide ring to drive the corresponding side rotating sleeve to pull the slide rod and the first rotating block. The first rotating block can pull the telescopic rod to unfold and pull the external first spring. The first spring can absorb the offset of the guide ring with its own elasticity. By partially offsetting the guide ring, the excessive offset of the prestressing tendon is reduced. After the threading position is adjusted, the prestressing tendon is guided to improve the threading efficiency.

[0026] 3. In this invention, the second rotating block can rotate around the fixed base through the designed fixed base and rotating sleeve, while the first rotating block can slide on the groove on one side of the rotating sleeve through the slider. This is beneficial to improve the full mobility and adaptability of the guide ring through the relative rotation and deflection of the first and second rotating blocks on both sides and the collapse movement of the slider. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a multifunctional prestressed tendon threading machine proposed in this invention;

[0028] Figure 2 This is a schematic diagram of the disassembled structure of the rotary drive component of a multifunctional prestressed tendon threading machine proposed in this invention;

[0029] Figure 3 This is a schematic diagram of the lateral structure of a multifunctional prestressed tendon threading machine proposed in this invention;

[0030] Figure 4 This is a schematic diagram of the assembly structure of the rotary drive component of a multifunctional prestressed tendon threading machine proposed in this invention;

[0031] Figure 5 This is a schematic diagram of the buffer mechanism structure of a multifunctional prestressed tendon threading machine proposed in this invention;

[0032] Figure 6 This is a schematic diagram of the guiding mechanism structure of a multifunctional prestressed tendon threading machine proposed in this invention;

[0033] Figure 7 This is a schematic diagram showing the disassembled structure of a multifunctional prestressed tendon threading machine proposed in this invention;

[0034] Figure 8 This is a schematic diagram of the assembly structure of the control mechanism of a multifunctional prestressed tendon threading machine proposed in this invention.

[0035] Legend:

[0036] 1. Beam threading frame; 2. Drive motor; 3. Shielding cover; 4. Rotary drive assembly; 401. Gear ring; 402. Drive gear; 403. Rotary motor; 5. Buffer mechanism; 501. Fixed ring; 502. Guide ring; 503. Guide ball; 504. Rotating sleeve; 505. Slide rod; 506. First rotating block; 507. Telescopic rod; 508. First spring; 509. Second rotating block; 510. Fixed seat; 6. Guide mechanism; 601. Guide seat; 602. Guide sleeve; 603. Fixed plate; 604. Adjusting screw; 605. Guide rod; 606. Screw drive unit; 607. Connecting plate; 7. Control mechanism; 701. Hydraulic cylinder; 702. Connecting block; 703. Connecting clamp; 8. Beam threading wheel; 9. Positioning ring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-8 The present invention provides a technical solution: a multifunctional prestressed tendon threading machine, including a threading frame 1. The threading frame 1 has several threading wheels 8 on both sides of the threading cavity. The threading wheels 8 are connected to a drive motor 2 through a gearbox. The drive motor 2 is connected to the outside of the threading frame 1. The prestressed tendons are transmitted by rotating the threading wheels 8. The outlet of the threading frame 1 is provided with a buffer mechanism 5. A rotary drive assembly 4 is installed on the front side of the buffer mechanism 5. A guide mechanism 6 is rotatably installed on the rotary drive assembly 4. A positioning ring 9 is installed on the rear side of the rotary drive assembly 4. A control mechanism 7 is installed on one side of the positioning ring 9. The control mechanism 7 is connected to the front side of the outlet of the threading frame 1.

[0039] The guiding mechanism 6 includes a guide sleeve 602, which is configured to move radially along the rotary drive assembly 4. The rotary drive assembly 4 rotates and adjusts the guide sleeve 602 to the position of the wire outlet of the wire threading frame 1 to fully fill the wire threading hole.

[0040] The rotary drive assembly 4 includes a gear ring 401, which is rotatably connected to one side of the positioning ring 9 via a bearing. A drive gear 402 is meshed on one side of the gear ring 401, and a rotary motor 403 is mounted on one side of the drive gear 402. The rotary motor 403 is connected to the outside of the positioning ring 9.

[0041] The control mechanism 7 includes a hydraulic cylinder 701, which is connected to the outside of the shield 3 via a mounting component. One end of the piston rod of the hydraulic cylinder 701 is connected to a connecting block 702, and the bottom of the connecting block 702 is connected to a connecting clamp 703, which is connected to the outside of the positioning ring 9.

[0042] The guiding mechanism 6 includes a guide seat 601, which is connected to one side of the toothed ring 401 at a corresponding position via a connector. A connecting plate 607 is connected to one side of the inner cavity of the guide seat 601. A lead screw seat is rotatably connected to the top of the connecting plate 607 via a bearing. An adjusting lead screw 604 is driven through the lead screw seat. One end of the adjusting lead screw 604 is connected to a fixing plate 603, which is connected to the outside of the guide sleeve 602. A lead screw drive unit 606 is driven through the lead screw seat. The guide sleeve 602 is pulled by moving the lead screw. Guide rods 605 are connected to both sides of the top of the fixing plate 603. The top ends of the guide rods 605 pass through the guide holes opened at corresponding positions on the connecting plate 607 and the guide seat 601.

[0043] Specifically: When it is necessary to thread prestressed tendons, the threading frame 1 can be moved to the corresponding threading hole side. When the prestressed tendons are threaded into the threading frame 1, the drive motor 2 can drive the prestressed tendons to move into the threading hole side by rotating the threading wheel 8. When threading multiple tendons into the threading hole, when the lead screw drive part 606 drives the lead screw seat to rotate, the rotation of the lead screw seat can drive the adjusting lead screw 604 to move. The adjusting lead screw 604 can pull the guide sleeve 602 to move through the bottom fixing plate 603. The movement of the guide sleeve 602 can adjust the radial position of the internal wire harness relative to the corresponding threading hole. Meanwhile, the rotation of the output shaft of the rotary motor 403 can drive the drive gear 402 to rotate. The rotation of the drive gear 402 can drive the gear ring 401 and the front guide seat 601 to rotate and adjust the circumferential angle. By adjusting the circumferential angle of the guide seat 601 in conjunction with the adjustment of the radial position, the guiding position of the guide sleeve 602 can be fully adjusted within the range of the gear ring 401. This facilitates the rapid guidance of the next prestressing tendon to the adjacent position after the single prestressing tendon is pierced. It is beneficial to quickly guide the arrangement of the prestressing tendons in the piercing hole, improve the piercing tightness, and facilitate subsequent tensioning control.

[0044] Please see Figure 5 The buffer mechanism 5 includes a fixed ring 501, which is connected to the positioning ring 9 on the side near the threading frame 1. The fixed ring 501 has a movable guide ring 502 in its inner cavity, and the guiding direction is adjusted by moving the guide ring 502 within the fixed ring 501.

[0045] A rotating sleeve 504 is connected around the outer periphery of the guide ring 502 along the axis. A sliding groove is opened through one side of the rotating sleeve 504. A sliding rod 505 is slidably connected in the sliding groove. A first rotating block 506 is connected to the outside of the sliding rod 505. A telescopic rod 507 is connected to one side of the first rotating block 506. A second rotating block 509 is connected to the other end of the telescopic rod 507. A fixed seat 510 is rotatably connected to the outside of the second rotating block 509. The fixed seat 510 is connected to a corresponding position on one side of the inner cavity of the fixed ring 501. A first spring 508 is sleeved on the outside of the telescopic rod 507. The two ends of the first spring 508 are respectively connected to the opposite side of the first rotating block 506 and the second rotating block 509.

[0046] The inner cavity of the guide ring 502 is provided with multiple universal bearings embedded around the axis, and the universal bearings are rotatably connected to guide balls 503.

[0047] Specifically: Through the designed buffer mechanism 5, when the prestressing tendon is threaded, it can extend into the guide ring 502. At this time, the guide ring 502 can rotate through the internal guide ball 503 to reduce the threading friction. When the front guide sleeve 602 adjusts the guiding position, the tension on the rear side of the prestressing tendon can pull the guide ring 502 to drive the corresponding side rotating sleeve 504 to pull the slide rod 505 and the first rotating block 506. The first rotating block 506 can pull the telescopic rod 507 to unfold and pull the external first spring 508. The first spring 508 can absorb the offset of the guide ring 502 with its own elasticity. By partially offsetting the guide ring 502, the excessive offset of the prestressing tendon is reduced. After the threading position is adjusted, the prestressing tendon is guided to improve the threading efficiency.

[0048] By using multiple telescopic rods 507 and a first spring 508 arranged around the periphery, the adaptability of the straight line adjustment of the periphery position through the cooperation of the first spring 508 and the telescopic rods 507 can be further improved to guide the threading.

[0049] The telescopic rod 507 includes a telescopic part and a fixed part. When an impact occurs, the telescopic part can absorb the impact of the external first spring 508 through its extension and retraction within the fixed part, which helps to improve the buffering and impact resistance and improve the guiding effect.

[0050] Furthermore, through the designed fixed base 510 and rotating sleeve 504, the second rotating block 509 can rotate around the fixed base 510, while the first rotating block 506 can slide on the slide groove on one side of the rotating sleeve 504 through the slider. This facilitates the relative rotation and deflection of the first rotating block 506 and the second rotating block 509 on both sides, as well as the collapse movement of the slider, thereby improving the full mobility and adaptability of the guide ring 502.

[0051] Working principle: During use, when prestressed tendons need to be threaded, the threading frame 1 is moved to the corresponding threading hole side. When the prestressed tendons are threaded into the threading frame 1, the drive motor 2 drives the prestressed tendons to move into the threading hole side through the rotation of the threading wheel 8. When threading multiple tendons into the threading hole, the lead screw drive unit 606 drives the lead screw seat to rotate. The rotation of the lead screw seat drives the adjusting lead screw 604 to move. The adjusting lead screw 604 can pull the guide sleeve 602 to move through the bottom fixing plate 603. The guide sleeve 602 moves to adjust... The internal wire harness corresponds to the radial position of the through hole. The output shaft of the rotary motor 403 rotates, driving the drive gear 402 to rotate. The rotation of the drive gear 402 drives the gear ring 401 and the front guide seat 601 to rotate and adjust the circumferential angle. By adjusting the circumferential angle of the guide seat 601 in conjunction with the adjustment of the radial position, the guiding position of the guide sleeve 602 is fully adjusted within the range of the gear ring 401. After the single prestressing tendon is through the hole, the next prestressing tendon is quickly guided to the adjacent position to guide the arrangement of the prestressing tendons in the through hole.

[0052] When the prestressing tendon is threaded through the prestressing tendon, it extends into the guide ring 502. At this time, the guide ring 502 rotates through the internal guide ball 503 to reduce the threading friction. When the front guide sleeve 602 adjusts the guiding position, the tension on the rear side of the prestressing tendon pulls the guide ring 502, which drives the corresponding side rotating sleeve 504 to pull the slide rod 505 and the first rotating block 506. The first rotating block 506 pulls the telescopic rod 507 to unfold and pull the external first spring 508. The first spring 508 uses its own elasticity to absorb the offset of the guide ring 502.

[0053] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multifunctional prestressed tendon threading machine, comprising a threading frame (1), wherein the threading frame (1) has a plurality of threading wheels (8) on both sides of the threading cavity, the threading wheels (8) being connected to a drive motor (2) via a gearbox, the drive motor (2) being connected to the outside of the threading frame (1), and driving the prestressed tendon transmission by rotating the threading wheels (8), characterized in that, The cable threading frame (1) has a buffer mechanism (5) at the cable outlet. A rotary drive assembly (4) is installed on the front side of the buffer mechanism (5). A guide mechanism (6) is rotatably installed on the rotary drive assembly (4). A positioning ring (9) is installed on the rear side of the rotary drive assembly (4). A control mechanism (7) is installed on one side of the positioning ring (9). The control mechanism (7) is connected to the front side of the cable threading frame (1). The guiding mechanism (6) includes a guide sleeve (602) configured to move radially along the rotation drive assembly (4) and to be rotated by the rotation drive assembly (4) to position the guide sleeve (602) at the wire outlet of the wire threading frame (1) to fully fill the wire threading hole.

2. The multifunctional prestressed tendon threading machine according to claim 1, characterized in that, The rotary drive assembly (4) includes a gear ring (401), which is rotatably connected to one side of the positioning ring (9) via a bearing. A drive gear (402) is meshed on one side of the gear ring (401), and a rotary motor (403) is installed on one side of the drive gear (402). The rotary motor (403) is connected to the outside of the positioning ring (9).

3. The multifunctional prestressed tendon threading machine according to claim 1, characterized in that, The control mechanism (7) includes a hydraulic cylinder (701), which is connected to the outside of the shield (3) via a mounting component. One end of the piston rod of the hydraulic cylinder (701) is connected to a connecting block (702), and the bottom of the connecting block (702) is connected to a connecting clamp (703), which is connected to the outside of the positioning ring (9).

4. The multifunctional prestressed tendon threading machine according to claim 1, characterized in that, The guiding mechanism (6) includes a guide seat (601), which is connected to one side of the toothed ring (401) at the corresponding position via a connector. A connecting plate (607) is connected to one side of the inner cavity of the guide seat (601). A lead screw seat is rotatably connected to the top of the connecting plate (607) via a bearing. An adjusting lead screw (604) is driven through the lead screw seat. A fixing plate (603) is connected to one end of the adjusting lead screw (604). The fixing plate (603) is connected to the outside of the guide sleeve (602). A lead screw drive unit (606) is driven through the outside of the lead screw seat. The guide sleeve (602) is pulled by moving the lead screw.

5. A multifunctional prestressed tendon threading machine according to claim 4, characterized in that, Guide rods (605) are connected to both sides of the top of the fixing plate (603). The top of the guide rods (605) passes through the guide holes opened at corresponding positions on the connecting plate (607) and the guide seat (601).

6. The multifunctional prestressed tendon threading machine according to claim 1, characterized in that, The buffer mechanism (5) includes a fixed ring (501), which is connected to the side of the positioning ring (9) near the threading frame (1). The inner cavity of the fixed ring (501) is provided with a movable guide ring (502), and the guiding direction is adjusted by the movement of the guide ring (502) within the fixed ring (501).

7. A multifunctional prestressed tendon threading machine according to claim 6, characterized in that, A rotating sleeve (504) is connected around the outer periphery of the guide ring (502) along the axis. A sliding groove is opened through one side of the rotating sleeve (504), and a sliding rod (505) is slidably connected in the sliding groove. A first rotating block (506) is connected to the outside of the sliding rod (505). A telescopic rod (507) is connected to one side of the first rotating block (506), and a second rotating block (509) is connected to the other end of the telescopic rod (507). A fixed seat (510) is rotatably connected to the outside of the second rotating block (509). The fixed seat (510) is connected to the corresponding position on one side of the inner cavity of the fixed ring (501). A first spring (508) is sleeved on the outside of the telescopic rod (507). The two ends of the first spring (508) are respectively connected to the opposite side of the first rotating block (506) and the second rotating block (509).

8. A multifunctional prestressed tendon threading machine according to claim 7, characterized in that, The inner cavity of the guide ring (502) is provided with multiple universal bearings embedded around the axis, and a guide ball (503) is rotatably connected inside the universal bearing.

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