Pipe pile prestress tensioning device

Abstract

The utility model discloses a pipe pile prestress tensioning device which comprises a tensioning screw rod and a tensioning machine, the tensioning machine is provided with an output screw rod, the pipe pile prestress tensioning device further comprises a connecting sleeve, the connecting sleeve is arranged between the tensioning screw rod and the output screw rod, one end of the connecting sleeve is provided with a first threaded hole, the other end of the connecting sleeve is provided with a second threaded hole, the second threaded hole is a stepped hole, and the first threaded hole is connected with the output screw rod. The hole diameter is gradually reduced from the end of the connecting sleeve to the middle of the connecting sleeve, the output screw is connected with the connecting sleeve through the first threaded hole, and the tensioning screw is connected with the connecting sleeve through the second threaded hole. The pipe pile tensioning device can be matched with tensioning screws of different pipe piles, and is low in cost and convenient and fast to operate, assemble and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile production, and particularly relates to a prestressed tensioning device for pipe piles. Background Technique

[0002] A pipe pile is a hollow cylindrical concrete member formed by a steel reinforcement cage or axial main reinforcement in cooperation with concrete in a pipe mold. During the production of pipe piles, after the steel reinforcement cage or axial main reinforcement and the concrete are placed in the pipe mold, prestress tensioning needs to be carried out first. Prestress tensioning is to apply a tensile force in advance in the member to make the member bear tensile stress, and then make it produce a certain deformation to cope with the load received by the member itself.

[0003] Currently, the tensioning of pipe piles mainly relies on a tensioning machine to axially tension the steel reinforcement cage or axial main reinforcement of the pipe pile. The steel reinforcement cage or axial main reinforcement of the pipe pile is sleeved with an end plate, the end plate is connected to a tensioning plate, and the tensioning plate is connected to the tensioning machine through a tensioning screw. The tensioning machine is configured with a tensioning mechanism that matches the tensioning screw. When tensioning pipe piles of different specifications, since tensioning screws of different diameters are required, the tensioning machine needs to be configured with an adapted tensioning mechanism. For example, in the Chinese utility model patent with the application number "202223022212.9" and the name "A Pipe Pile Tensioning Mechanism", a detachable connecting component is installed on the output rod of the tensioning cylinder, and the support block is driven by a micro cylinder to perform linear motion, which can be flexibly adjusted according to the diameter of the pull head screw on the corresponding pipe pile, solving the problem that the traditional pipe pile tensioning mechanism can only adapt to the pull head screws of corresponding specifications. However, the structure of this patent is relatively complex, the cost increases, the operation is time-consuming and laborious, and the loading and unloading are also rather troublesome. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a prestressed tensioning device for pipe piles, which can adapt to the tensioning screws of different pipe piles, has a low cost, and is convenient and fast for operation, loading and unloading.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A prestressed tensioning device for pipe piles, including a tensioning screw and a tensioning machine. The tensioning machine is provided with an output screw, and further includes a connecting sleeve. The connecting sleeve is arranged between the tensioning screw and the output screw. One end of the connecting sleeve is provided with a first threaded hole, and the other end is provided with a second threaded hole. The second threaded hole is a stepped hole, and the hole diameter gradually decreases from the end of the connecting sleeve to the middle. The output screw is connected to the connecting sleeve through the first threaded hole, and the tensioning screw is connected to the connecting sleeve through the second threaded hole.

[0006] As a preference of this technical solution, the first threaded hole is also a stepped hole, the first threaded hole communicates with the second threaded hole, and is symmetrically arranged with respect to the longitudinal section of the middle part of the connecting sleeve.

[0007] Preferably in this technical solution, the tensioning screw and the output screw have standard diameters, and the apertures of the first threaded hole and the second threaded hole are corresponding standard sizes.

[0008] Preferably in this technical solution, the tensioning machine includes a machine body, a motor, a tensioning screw rod, and a track. The machine body is threadedly connected to the tensioning screw rod and slides on the track. The output end of the motor is connected to the tensioning screw rod to drive the tensioning screw rod to rotate, thereby driving the machine body to move on the tensioning screw rod.

[0009] Preferably in this technical solution, there are two tracks. The two tracks are parallel to each other. The two sides of the bottom end of the machine body slide on the tracks, and the tensioning screw rod is arranged between the two tracks.

[0010] Compared with the prior art, the utility model is provided with a connecting sleeve. One end of the connecting sleeve is provided with a first threaded through hole, and the other end is provided with a second threaded hole. The second threaded hole is a stepped hole, and the aperture gradually decreases from the end of the connecting sleeve to the middle. The tensioning screw is connected to the connecting sleeve through the second threaded hole. When different diameters of the tensioning screw are used, a suitable thread is obtained through the provided stepped hole for connection, adapting to tensioning screws of different diameters. The structure is simple, the cost is low, and the operation and loading / unloading are convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the utility model.

[0012] Figure 2 is a schematic structural diagram of the tensioning machine of the utility model.

[0013] Figure 3 is a schematic structural diagram of an embodiment of the connecting sleeve of the utility model.

[0014] Figure 4 is a schematic structural diagram of another embodiment of the connecting sleeve of the utility model.

[0015] In the figure: 1. Tensioning screw; 2. Tensioning machine; 3. Output screw; 4. Connecting sleeve; 4.1. First threaded hole; 4.2. Second threaded hole; 5. Motor; 6. Tensioning screw rod; 7. Track; 8. Machine body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0017] Please refer toFigures 1-4 , a prestressed tensioning device for pipe piles of the present utility model, includes a tensioning screw 1 and a tensioning machine 2. One end of the tensioning screw 1 is connected to a tensioning plate inside the pipe mold, and the other end extends outside the pipe mold and is connected to the tensioning machine 2. The tensioning machine 2 is provided with an output screw 3, and also includes a connecting sleeve 4. The connecting sleeve 4 is arranged between the tensioning screw 1 and the output screw 3. One end of the connecting sleeve 4 is provided with a first threaded hole 4.1, and the other end is provided with a second threaded hole 4.2. The first threaded hole 4.1 and the second threaded hole 4.2 are both coaxial with the connecting sleeve 4. The second threaded hole 4.2 is a stepped hole, and the hole diameter gradually decreases from the end of the connecting sleeve 4 to the middle. The output screw 3 is connected to the connecting sleeve 4 through the first threaded hole 4.1, and the tensioning screw 1 is connected to the connecting sleeve 4 through the second threaded hole 4.2.

[0018] When the present utility model is specifically implemented, the first threaded hole 4.1 is also a stepped hole. The first threaded hole 4.1 and the second threaded hole 4.2 are communicated, that is, the smallest diameter part in the middle is communicated. The first threaded hole 4.1 and the second threaded hole 4.2 are symmetrically arranged with respect to the longitudinal cross-section of the middle part of the connecting sleeve 4, that is, the threaded hole diameters of each corresponding step at the left and right ends are the same. The first threaded hole 4.1 being a stepped hole can adapt to output screws 3 of different sizes. The diameters of the tensioning screw 1 and the output screw 3 are standard sizes, and the hole diameters of the first threaded hole 4.1 and the second threaded hole 4.2 are corresponding standard sizes, that is, national standard sizes rather than non-standard sizes, which are obtained by querying and selecting from a mechanical manual, such as M50, M55, M60, etc. When replacing different tensioning screws 1, the connecting sleeve 4 does not need to be replaced, and there can be an adapted threaded through-hole 4.1 for connection.

[0019] When the present utility model is specifically implemented, the tensioning machine 2 includes a machine body 8, a motor 5, a tensioning screw rod 6, and a track 7. The machine body 8 is threadedly connected to the tensioning screw rod 6 and slides on the track 7. The output end of the motor 5 is connected to the tensioning screw rod 6, driving the tensioning screw rod 6 to rotate and thereby driving the machine body 8 to move on the tensioning screw rod 6. Two tracks 7 are provided, and the two tracks 7 are parallel to each other. The two sides at the bottom end of the machine body 8 slide on the tracks 7, and the tensioning screw rod 6 is arranged between the two tracks 7.

[0020] When the present utility model is specifically used, first connect the tensioning screw and the tensioning plate well, and connect the connecting sleeve to the end of the tensioning screw extending outside the pipe mold. Specifically, when connecting, find the threaded hole adapted to the tensioning screw through each stepped hole for connection. Then drive the tensioning machine to move towards the tensioning screw, so that the connecting sleeve is sleeved onto the output screw. While rotating the connecting sleeve and moving the tensioning machine, until the connection is completed. When replacing a tensioning screw of a different size, the connecting sleeve rotates and disengages from the tensioning screw, rather than being removed from the output screw. After replacing the tensioning screw, move the tensioning machine towards the tensioning screw and repeat the above operations.

[0021] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions described in the foregoing embodiments, or can easily conceive of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A prestressed tensioning device for a pipe pile, comprising a tensioning screw and a tensioning machine, wherein the tensioning machine is provided with an output screw, characterized in that: It also includes a connecting sleeve, which is arranged between the tensioning screw and the output screw. A first threaded hole is arranged at one end of the connecting sleeve, and a second threaded hole is arranged at the other end. The second threaded hole is a stepped hole, and the hole diameter gradually decreases from the end to the middle of the connecting sleeve. The output screw is connected to the connecting sleeve through the first threaded hole, and the tensioning screw is connected to the connecting sleeve through the second threaded hole.

2. The pipe pile prestressing tensioning device according to claim 1 is characterized in that: The first threaded hole is also a stepped hole. The first threaded hole is connected to the second threaded hole and is symmetrically arranged relative to the middle longitudinal section of the connecting sleeve.

3. The pipe pile prestressing tensioning device according to claim 2 is characterized in that: The diameters of the tensioning screw and the output screw are standard sizes, and the diameters of the first threaded hole and the second threaded hole are corresponding standard sizes.

4. The pipe pile prestressing tensioning device according to claim 1 is characterized in that: The tensioning machine comprises a machine body, a motor, a tensioning wire rod and a track. The machine body is threadedly connected to the tensioning wire rod and slides on the track. The output end of the motor is connected to the tensioning wire rod, driving the tensioning wire rod to rotate and then driving the machine body to move on the tensioning wire rod.

5. The pipe pile prestressing tensioning device according to claim 4 is characterized in that: Two tracks are provided, the two tracks are parallel to each other, the two sides of the bottom end of the machine body slide on the tracks, and the tensioning wire rod is arranged between the two tracks.

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