Tensioning equipment for large-span prestressed tendon

Abstract

The utility model provides a stretch-draw device for a large span prestressed reinforcement, which relates to the technical field of stretch-draw devices for prestressed reinforcement, and comprises a piston, a cylinder body is sleeved on the edge of the outer surface of the piston close to one side in a sliding manner, and an end cover is fixedly connected on the edge of the inner part of the cylinder body close to one side. A sealing ring seat is fixedly arranged on the surface of one side of the end cover, the outer surface of one side of the sealing ring seat is attached to the inner surface wall of the cylinder body, an inner cylinder sleeve is connected between the sealing ring seat and the outer surface of one side of the end cover in a clamped mode, and the outer surface of the inner cylinder sleeve is connected with the outer surface of the piston in a sliding mode. The prestressed reinforcement tensioning device solves the problems that when traditional prestressed reinforcement tensioning equipment conducts tensioning, small tensioning force can only be achieved through a simple framework, large-span tensioning force is needed for many parts in life, an existing tensioning framework cannot achieve the tensioning force, and then the use efficiency of the device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed steel bar tensioning equipment, in particular to a prestressed steel bar tensioning equipment for a large span. Background Art

[0002] Prestressed steel bar tensioning equipment is a device that generates and maintains prestress in the steel bars of prestressed concrete structures.

[0003] When using prestressed steel bar tensioning equipment to tension steel strands, traditional prestressed steel bar tensioning equipment can only achieve a smaller tensioning force through a simple structure during tensioning. Many parts of life require a large span of tensioning force, which makes it impossible to achieve the existing tensioning structure, thereby reducing the efficiency of the device. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that traditional prestressed steel bar tensioning equipment can only achieve a small tensioning force through a simple structure when tensioning, and there are many parts in life that require a large-span tensioning force, which makes the existing tensioning structure unable to achieve it, thereby reducing the efficiency of the device. A large-span prestressed steel bar tensioning equipment is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for tensioning prestressed tendons of large spans, comprising a piston, a sliding sleeve is provided with a cylinder body at an edge of the outer surface of the piston near one side, an end cover is fixedly connected to an edge of the inner part of the cylinder body near one side, a sealing ring seat is fixedly provided on one side surface of the end cover, and the outer surface of one side of the sealing ring seat is fitted with the inner surface wall of the cylinder body, an inner cylinder sleeve is clamped and connected between the sealing ring seat and the outer surface of one side of the end cover, and the outer surface of the inner cylinder sleeve is slidably connected to the outer surface of the piston, a connecting sleeve is fixedly connected to the edge of the outer surface of the inner cylinder sleeve near one side, and the outer surface of one side of the connecting sleeve is fitted and connected with the outer surface of one side of the piston, a tool clamp is fixedly connected to the inner surface wall of one side of the connecting sleeve, a spring seat is fixedly installed on the outer surface of one side of the tool clamp, and the outer surface of the spring seat is fitted and connected with the inner surface wall of the inner cylinder sleeve.

[0006] As a preferred embodiment, a top anchor seat is fixedly sleeved on the edge of the outer surface of the piston near the other side, and a top anchor is fixedly installed on the outer surface of one side of the top anchor seat near the center.

[0007] As a preferred embodiment, a top anchor head is fixedly connected to an edge of one side of the outer surface of the top anchor seat by means of screws, and a steel strand is connected through the interior of the top anchor head.

[0008] As a preferred embodiment, an oil medium is provided between the interior of the cylinder body and the exterior of the inner cylinder sleeve, and the oil medium is slidably connected to one end of the piston.

[0009] As a preferred embodiment, a dust ring is snap-connected to an edge of the inner surface wall of the cylinder body close to one side, and a shaft sealing ring is snap-connected to a side of the inner surface wall of the cylinder body close to the dust ring.

[0010] As a preferred embodiment, an O-ring is snap-connected to the edge of the inner surface of the sealing ring seat near one side, and a retaining ring is snap-connected to the edge of the inner surface of the sealing ring seat near the other side, and the outer surfaces of the O-ring and the retaining ring are both in contact with the outer surface of the inner cylinder sleeve.

[0011] As a preferred embodiment, the outer surfaces of the sealing ring seat and the piston are both sleeved and connected with a Gly ring, and the Gly ring is snap-fitted and connected to the inner surface wall of the cylinder body.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the steel strand is inserted into the interior of the top anchor head and then penetrates the equipment, so that the device is easy to use normally, and then the cylinder body is moved backward by the liquid pressure inside the oil medium, and tensioning is performed during the movement, so that the piston slides away inside the cylinder body until the piston and the connecting sleeve are restricted, so that the steel strand is effectively tensioned over a large span, and the steel strand is clamped by the top anchor, and the tool clamp also clamps the steel strand, so that the steel strand is not easy to break when being tensioned, so that the device is easy to be effectively controlled and the use efficiency of the device is improved.

[0014] 2. In the utility model, by providing a dustproof ring, dust will not enter the cylinder through the gap between the cylinder and the piston during the tensioning process, thereby extending the service life of the oil medium inside the cylinder, thereby improving the use effect of the device. Further, by providing a shaft sealing ring, the piston is more flexible and convenient when sliding, and is not prone to jamming or clogging, making the device easy to use effectively. Finally, by providing an O-ring and a retaining ring, the bottom of the device has a better stabilizing effect, making the device not easy to loosen during the tensioning and impacting process, so that the device can be used well. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a main perspective structural schematic diagram of a large-span prestressed tendon tensioning device;

[0016] Figure 2The utility model provides a schematic diagram of a main view of a sectional three-dimensional structure of a large-span prestressed tendon tensioning device;

[0017] Figure 3 The utility model provides a three-dimensional structural diagram of a piston part for a large-span prestressed tendon tensioning device;

[0018] Figure 4 The utility model provides a three-dimensional structural schematic diagram of a sealing ring seat part used for large-span prestressed tendon tensioning equipment.

[0019] Legend: 1. Piston; 2. Cylinder body; 3. Inner cylinder sleeve; 4. Sealing ring seat; 5. End cover; 6. Connecting sleeve; 7. Spring seat; 8. Tool clip; 9. Top anchor; 10. Top anchor seat; 11. Top anchor head; 12. Steel strand; 13. Oil medium; 14. Dust seal; 15. Shaft sealing ring; 16. O-ring; 17. Retaining ring; 18. Gly ring. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1, as Figure 1-4As shown, the utility model provides a large-span prestressed tendon tensioning device, including a piston 1, a cylinder body 2 is provided with a sliding sleeve at the edge of the outer surface of the piston 1 near one side, an end cover 5 is fixedly connected to the inner edge of the cylinder body 2 near one side, a sealing ring seat 4 is fixedly provided on one side surface of the end cover 5, and the outer surface of one side of the sealing ring seat 4 is in contact with the inner surface wall of the cylinder body 2, an inner cylinder sleeve 3 is clamped and connected between the outer surface of the sealing ring seat 4 and one side of the end cover 5, and the outer surface of the inner cylinder sleeve 3 is slidably connected to the outer surface of the piston 1, and the outer surface of the inner cylinder sleeve 3 is fixedly connected to the edge of the outer surface of the inner cylinder sleeve 3 near one side. 6, and the outer surface of one side of the connecting sleeve 6 is fitted and connected with the outer surface of one side of the piston 1, a tool clamp 8 is fixedly connected to the inner surface wall of one side of the connecting sleeve 6, a spring seat 7 is fixedly installed on the outer surface of one side of the tool clamp 8, and the outer surface of the spring seat 7 is fitted and connected with the inner surface wall of the inner cylinder sleeve 3, a top anchor seat 10 is fixedly sleeved at the edge of the outer surface of the piston 1 near the other side, a top anchor 9 is fixedly installed at the outer surface of one side of the top anchor seat 10 near the center, a top anchor head 11 is fixedly connected to the outer surface of the top anchor seat 10 near the edge of one side by a screw, and a steel strand 12 is penetrated and connected inside the top anchor head 11.

[0023] The effect achieved by the entire embodiment 1 is that when the device is used, the steel strand 12 is first inserted into the interior of the top anchor head 11 and then penetrates the equipment, so that the device is easy to use normally, and then the cylinder body 2 is moved backward by the liquid pressure inside the oil medium 13, and tensioning is performed during the movement, so that the piston 1 slides away inside the cylinder body 2 until the piston 1 and the connecting sleeve 6 are restricted, so that the steel strand 12 is effectively tensioned over a large span, and the steel strand 12 is clamped by the top anchor 9, and the tool clamp 8 also clamps the steel strand 12, so that the steel strand 12 is not easy to break when being tensioned, so that the device is easy to be effectively controlled and the use efficiency of the device is improved.

[0024] Embodiment 2, as Figure 1-2 As shown, an oil medium 13 is provided between the inside of the cylinder body 2 and the outside of the inner cylinder sleeve 3, and the oil medium 13 is slidably connected to one end of the piston 1, a dust ring 14 is snap-connected to the edge of the inner surface wall of the cylinder body 2 near one side, a shaft sealing ring 15 is snap-connected to the inner surface wall of the cylinder body 2 near the dust ring 14, an O-ring 16 is snap-connected to the edge of the inner surface of the sealing ring seat 4 near one side, a retaining ring 17 is snap-connected to the edge of the inner surface of the sealing ring seat 4 near the other side, and the outer surfaces of the O-ring 16 and the retaining ring 17 are both in contact with the outer surface of the inner cylinder sleeve 3, and the outer surfaces of the sealing ring seat 4 and the piston 1 are both sleeved with a grid ring 18, and the grid ring 18 is snap-connected to the inner surface wall of the cylinder body 2.

[0025] The effect achieved by the entire embodiment 2 is that when the device is in use, firstly, by setting the dustproof ring 14, dust will not enter the cylinder body 2 through the gap between the cylinder body 2 and the piston 1 during the tensioning process, so that the service life of the oil medium 13 inside the cylinder body 2 is longer, thereby improving the use effect of the device, and further, by setting the shaft sealing ring 15, the piston 1 is more flexible and convenient when sliding, and is not prone to jamming and clogging, so that the device is easy to use effectively, and finally, by the sleeve of the O-ring 16 and the retaining ring 17, the bottom of the device has a better stability effect, so that the device is not easy to loosen during the tensioning and impacting process, so that the device can be used well.

[0026] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for tensioning long-span prestressed tendons, comprising a piston (1), characterized in that: A cylinder body (2) is provided with a sliding sleeve at an edge of one side of the outer surface of the piston (1); an end cover (5) is fixedly connected to an edge of one side of the inner part of the cylinder body (2); a sealing ring seat (4) is fixedly provided on one side surface of the end cover (5), and an outer surface of one side of the sealing ring seat (4) is fitted with an inner surface wall of the cylinder body (2); an inner cylinder sleeve (3) is snap-fitted and connected between the outer surfaces of one side of the sealing ring seat (4) and the end cover (5), and an outer surface of the inner cylinder sleeve (3) is slidingly connected to an outer surface of the piston (1); a connecting sleeve (6) is fixedly connected to an edge of one side of the outer surface of the inner cylinder sleeve (3), and an outer surface of one side of the connecting sleeve (6) is fitted and connected with an outer surface of one side of the piston (1); a tool clamp (8) is fixedly connected to an inner surface wall of one side of the connecting sleeve (6); a spring seat (7) is fixedly installed on an outer surface of one side of the tool clamp (8), and an outer surface of the spring seat (7) is fitted and connected with an inner surface wall of the inner cylinder sleeve (3).

2. The large-span prestressed tendon tensioning device according to claim 1, characterized in that: A top anchor seat (10) is fixedly sleeved on the outer surface of the piston (1) near the edge of the other side, and a top anchor member (9) is fixedly installed on the outer surface of one side of the top anchor seat (10) near the center.

3. The large-span prestressed tendon tensioning device according to claim 2 is characterized in that: A top anchor head (11) is fixedly connected to an edge of one side of the outer surface of the top anchor seat (10) by means of screws, and a steel strand (12) is connected through the interior of the top anchor head (11).

4. The large-span prestressed tendon tensioning device according to claim 1, characterized in that: An oil medium (13) is provided between the interior of the cylinder body (2) and the exterior of the inner cylinder sleeve (3), and the oil medium (13) is slidably connected to one end of the piston (1).

5. The large-span prestressed tendon tensioning device according to claim 1, characterized in that: A dust ring (14) is snap-fitted to an edge of one side of the inner surface wall of the cylinder body (2), and a shaft sealing ring (15) is snap-fitted to a side of the inner surface wall of the cylinder body (2) close to the dust ring (14).

6. The large-span prestressed tendon tensioning device according to claim 1, characterized in that: An O-ring (16) is snap-fitted to the edge of one side of the inner surface of the sealing ring seat (4), and a retaining ring (17) is snap-fitted to the edge of the other side of the inner surface of the sealing ring seat (4), and the outer surfaces of the O-ring (16) and the retaining ring (17) are both in contact with the outer surface of the inner cylinder sleeve (3).

7. The large-span prestressed tendon tensioning device according to claim 1, characterized in that: The outer surfaces of the sealing ring seat (4) and the piston (1) are both sleeved and connected with a Gly ring (18), and the Gly ring (18) is snap-fitted and connected to the inner surface wall of the cylinder body (2).

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