Simple integral type steel strand pulling device

Abstract

The utility model relates to the field of steel strand pulling, and discloses a simple integral type steel strand pulling device which comprises a barrel, a locking piece, a screw rod, a conical block, a connecting assembly, a limiting assembly and a driving assembly, a strand pulling hole is coaxially formed in the barrel, the locking piece is arranged on the inner side of the strand pulling hole, the screw rod is coaxially arranged in the strand pulling hole, and one end of the screw rod is in threaded connection with the conical block in a sleeving mode. The other end of the screw rod is connected with a connecting assembly, the connecting assembly comprises a step block, the end part of one end of the screw rod extends into the end side of the barrel body and is fixedly connected with the step block, one side of the connecting assembly is connected with a driving assembly, the other end of the screw rod is provided with a supporting block, the supporting block is connected with a limiting assembly, and the limiting assembly comprises four limiting rods; limiting holes corresponding to the limiting rods are formed in the conical block and are annularly distributed at equal intervals. According to the invention, the problem of stable connection when the steel strand is integrally pulled is solved.

Description

Technical Field

[0001] The present application relates to the technical field of steel strand bundle threading, for example, to a simple integral steel strand bundle threading device. Background Art

[0002] During the manufacturing and construction of prestressed bridges, multiple strands of steel wire are bundled together to apply prestress. This is known as prestressing bundle threading. Currently, two common bundle threading methods are single strand threading and integrated bundle threading. Single strand threading uses a bundle threading machine to thread the steel strands one at a time through a corrugated tube. This method is not only time-consuming but also fails to completely prevent entanglement between strands inserted later and earlier. It also results in uneven stress on the strands during tensioning. Therefore, integrated bundle threading is generally used.

[0003] Through the equipment in the prior art, it is found that the overall bundle is generally threaded using the pier head method, which requires cutting off the outer ring steel wire of the steel strand and leaving only the center steel wire. The center steel wire of the multi-strand steel strand is then passed through the pier head, and then the traction head and the traction sleeve are connected for fixation. This method is extremely labor-intensive and cumbersome, affecting work efficiency. The method of directly passing the entire bundle of strands of steel strands into the pier head and then tightening and fixing them with a locking piece results in the internal part of the entire bundle being hollow when the multi-strand steel strands are fitted together. This state lacks the force to resist outward divergence and can only be restrained and fixed by the inward gripping force of the locking piece. It is difficult to maintain a stable connection when the steel strands are pulled as a whole, and there is a risk of loosening. Utility Model Content

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The disclosed embodiments provide a simple integral steel strand bundle threading device to solve the problem of stable connection when the steel strands are pulled as a whole.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A simple integral steel strand bundle passing device comprises a barrel, a locking piece, a screw, a conical block, a connecting assembly, a limiting assembly and a driving assembly. A bundle passing hole is coaxially arranged inside the barrel, a locking piece is arranged inside the bundle passing hole, a screw is coaxially arranged inside the bundle passing hole, one end of the screw is threadedly sleeved with a conical block, and the other end of the screw is connected to a connecting assembly. The connecting assembly comprises a step block, one end of the screw extends to the inside of the end side of the barrel and is fixedly connected to the step block, one side of the connecting assembly is connected to a driving assembly, and the connecting assembly can be driven to rotate by the driving assembly, and the step groove is used to rotate the step block. The constraint of the ball bearing can ensure the smooth rotation of the step block when rotation occurs. The driving assembly is mainly composed of a worm gear, a transmission rod, and a worm. The gear groove is mainly used for the placement and constraint of the worm gear. The axis of one side of the worm gear is fixedly connected to one end of the transmission rod, and the other end of the transmission rod is fixedly connected to the axis of one side of the step block. The step block and the worm gear can be synchronously connected through the transmission rod. One side of the worm gear is meshed with a worm, and the top end of the worm extends to the outside of the end of the cylinder. The other end of the screw is provided with a support block, and the support block is connected to a limiting assembly, and the limiting assembly includes a limiting rod, and the limiting rod is provided with Four, the conical block is provided with limiting holes corresponding to the limiting rods and are distributed in a circular shape with equal distances. The limiting rods all pass through the corresponding limiting holes and one end is connected to the support block, and the other end is fixedly connected to the inner wall of the end of the bundle hole. When performing the bundle threading operation, the entire bundle of steel strands is inserted into the bundle hole, and each strand of steel strand is evenly arranged along the outside of the conical block. Then, the distance between the end of the locking piece and the screw is adjusted by the thread. The specific adjustment method can adopt public technologies such as external tools, which will not be described here. Then, the worm is rotated by the adjusting handle, and the worm drives the worm wheel through the worm and then drives the step block to rotate through the transmission rod, and the step block drives the screw Rotation occurs, and the limiting rods act to limit the conical block, and then the screw thread drives the conical block to move. As the distance between the conical block and the locking piece gets closer and closer, the more the conical block disperses each strand of steel wire. That is, as the locking piece gets closer and closer to filling the hollow inside of each strand of steel wire through the conical block, the locking piece's internal gripping force on the entire bundle of steel wire strands becomes greater and greater. After it is completely fixed, the adjusting handle can be fixed using existing technology to achieve a stable gripping force, thereby maintaining a stable connection when the steel wire strand is pulled as a whole, avoiding the risk of loosening.

[0008] Furthermore, the locking member is a rod-shaped structure and one end is connected to the inner wall of the cylinder through a thread. The locking members are provided in several groups and are arranged at equal distances along the inner wall of the beam hole.

[0009] Furthermore, the step block is movably arranged in the step groove, and the step groove is opened inside the end side of the cylinder and is coaxial with the cylinder.

[0010] Furthermore, a plurality of balls are movably embedded in one side of the step block, and the balls are in contact with the inner wall of the step groove.

[0011] Furthermore, the worm gear is placed inside a gear groove, and the gear groove is opened inside the end side of the cylinder and is coaxial with the cylinder.

[0012] Furthermore, one end of the worm extending to the outside of the end of the cylinder is fixedly connected to an adjustment handle, which makes it convenient for the operator to rotate the worm through the adjustment handle. A square sliding sleeve is attached to the outside of the adjustment handle to increase friction and facilitate twisting.

[0013] The embodiment of the present disclosure provides a simple integrated steel strand bundle threading device, which can achieve the following technical effects:

[0014] The utility model drives the conical block to move under the action of the screw thread through the driving component. As the distance between the conical block and the locking piece becomes closer, the outward dispersion of each steel strand caused by the conical block becomes greater. That is, as the locking piece is closer and closer to filling the internal hollow space of each steel strand through the conical block, the internal gripping force of the locking piece on the entire bundle of steel strands becomes greater and greater. After it is completely fixed, the adjusting handle can be fixed by existing technology to achieve stable gripping force, thereby maintaining a stable connection when the steel strand is pulled as a whole, avoiding the risk of loosening.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings. These exemplified descriptions and drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. For ordinary technicians in this field, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the transverse cross-sectional structure of a simple integral steel strand bundle threading device of the present invention;

[0018] Figure 2 This utility model Figure 1 Enlarged structural diagram of part A in the middle.

[0019] Reference numerals:

[0020] 1. Cylinder; 2. Beam hole; 3. Locking piece; 4. Screw; 5. Conical block; 6. Connecting assembly; 601. Step groove; 602. Step block; 7. Limit assembly; 701. Limit hole; 702. Limit rod; 8. Drive assembly; 801. Gear groove; 802. Worm gear; 803. Drive rod; 804. Worm; 9. Support block; 10. Ball bearing; 11. Adjustment handle; 12. Anti-slip sleeve. DETAILED DESCRIPTION

[0021] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0022] A simple integral steel strand bundle threading device, comprising a barrel 1, a locking piece 3, a screw 4, a tapered block 5, a connecting assembly 6, a limiting assembly 7, and a driving assembly 8. A bundle hole 2 is coaxially arranged inside the barrel 1, and a locking piece 3 is provided inside the bundle hole 2. The locking piece 3 is a rod-shaped structure and one end is connected to the inner wall of the barrel 1 through a thread. The locking piece 3 is provided in several groups and is equidistantly arranged along the inner wall of the bundle hole 2. A screw 4 is coaxially arranged inside the bundle hole 2, and one end of the screw 4 is threadedly sleeved with a tapered block 5. The other end of the screw 4 is connected to a connecting assembly 6, and the connecting assembly 6 includes a step block 602. The step block 602 is movably placed in the step groove 601, and the step groove 601 is opened inside the end side of the cylinder 1 and is coaxial with the cylinder 1. One end of the screw 4 extends to the inside of the end side of the cylinder 1 and is fixedly connected to the step block 602. The driving component 8 is connected to one side of the connecting component 6, and the driving component 8 can drive the connecting component 6 to rotate. A plurality of balls 10 are movably embedded on one side of the step block 602, and the balls 10 are in contact with the inner wall of the step groove 601. The step groove 601 is used to restrain the step block 602, and the combination of the balls 10 can ensure the smooth rotation of the step block 602 when rotation occurs.

[0023] The drive assembly 8 mainly consists of a worm gear 802, a transmission rod 803, and a worm 804. The worm gear 802 is placed inside the gear groove 801. The gear groove 801 is opened inside the end side of the cylinder 1 and is coaxial with the cylinder 1. The gear groove 801 is mainly used for the placement and restraint of the worm gear 802. The axis of one side of the worm gear 802 is fixedly connected to one end of the transmission rod 803, and the other end of the transmission rod 803 is fixedly connected to the axis of one side of the step block 602. The synchronous connection between the step block 602 and the worm gear 802 can be achieved through the transmission rod 803. One side of the worm gear 802 is meshed with a worm 804. The top end of the worm 804 extends to the outside of the end of the cylinder 1. The end of the worm 804 extending to the outside of the end of the cylinder 1 is fixedly connected to an adjusting handle 11, which is convenient for the operator to rotate the worm 804 through the adjusting handle 11. The outside of the adjusting handle 11 is covered with an anti-slip sleeve 12 to increase friction and facilitate twisting.

[0024] A support block 9 is provided at the other end of the screw rod 4, and the support block 9 is connected to the limiting assembly 7. The limiting assembly 7 includes a limiting rod, and four limiting rods are provided. The conical block 5 is provided with limiting holes 701 corresponding to the limiting rods and are distributed equidistantly in a ring shape. The limiting rods all pass through the corresponding limiting holes 701 and one end is connected to the support block 9, and the other end is fixedly connected to the inner wall of the end of the beam hole 2.

[0025] When performing the bundle threading operation, the entire bundle of steel strands is inserted into the bundle threading hole 2, and each strand of steel strand is evenly arranged along the outer side of the tapered block 5. Then, the distance between the end of the locking member 3 and the screw 4 is adjusted by the thread. The specific adjustment method can adopt public technology such as external tools, which will not be described here. Then, the worm 804 is rotated by the adjusting handle 11, and the worm 804 drives the worm wheel 802 and then drives the step block 602 to rotate through the transmission rod 803. The step block 602 drives the screw 4 to rotate. Due to the function of each limit rod, the tapered block 5 is limited, and then The action of the screw 4 thread will drive the conical block 5 to move. As the distance between the conical block 5 and the locking piece 3 gets closer and closer, the more the conical block 5 will disperse the steel strands. That is, as the locking piece 3 gets closer and closer to filling the hollow inside of each steel strand through the conical block 5, the internal gripping force of the locking piece 3 on the entire bundle of steel strands becomes greater and greater. After it is completely fixed, the adjusting handle 11 can be fixed using existing technology to achieve a stable gripping force, thereby maintaining a stable connection when the steel strands are pulled as a whole, avoiding the risk of loosening.

[0026] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A simple integral steel strand threading device, characterized in that: It includes a barrel, a locking piece, a screw, a conical block, a connecting assembly, a limiting assembly, and a driving assembly. A beam hole is coaxially arranged inside the barrel, a locking piece is arranged inside the beam hole, a screw is coaxially arranged inside the beam hole, one end of the screw is threadedly sleeved with a conical block, and the other end of the screw is connected to a connecting assembly, the connecting assembly includes a step block, one end of the screw extends to the inside of the end side of the barrel and is fixedly connected to the step block, one side of the connecting assembly is connected to a driving assembly, and the driving assembly is mainly composed of a worm gear, a transmission rod, and a worm. The worm gear One end of a transmission rod is fixedly connected to the axis of one side of the transmission rod, and the other end of the transmission rod is fixedly connected to the axis of one side of the step block. A worm is meshedly connected to one side of the worm wheel, and the top end of the worm extends to the outside of the end of the cylinder. A support block is provided at the other end of the screw, and the support block is connected to a limiting assembly. The limiting assembly includes a limiting rod, and four limiting rods are provided. The conical block is provided with limiting holes corresponding to the limiting rods and are distributed equidistantly in a ring. The limiting rods all pass through the corresponding limiting holes and one end is connected to the support block, and the other end is fixedly connected to the inner wall of the end of the beam hole.

2. A simple integral steel strand bundle threading device according to claim 1, characterized in that: The locking member is a rod-shaped structure and one end is connected to the inner wall of the cylinder through a thread. The locking members are provided in several groups and are arranged at equal distances along the inner wall of the beam hole.

3. A simple integral steel strand bundle threading device according to claim 1, characterized in that: The step block is movably arranged in the step groove, and the step groove is opened inside the end side of the cylinder and is coaxial with the cylinder.

4. A simple integral steel strand bundle threading device according to claim 1, characterized in that: A plurality of balls are movably embedded on one side of the step block, and the balls are in contact with the inner wall of the step groove.

5. The simple integral steel strand bundle threading device according to claim 1, characterized in that: The worm gear is placed inside the gear groove, and the gear groove is opened inside the end side of the cylinder and is coaxial with the cylinder.

6. The simple integral steel strand threading device according to claim 1, characterized in that The worm extends to one end outside the end of the cylinder and is fixedly connected to an adjustment handle, and a square sliding sleeve is attached to the outside of the adjustment handle.

Images