Retard-bonded prestressed steel strand fixing structure

Abstract

The utility model relates to the technical field of fixing supports, in particular to a fixing structure for retard-bonded prestressed steel strands. The steel strand comprises a pipeline and a steel strand body, fixing devices are arranged at the two ends of the pipeline, each fixing device comprises two limiting plates, the sides, close to each other, of the two limiting plates are connected with the pipeline in a sliding mode, a pouring hole is formed in one end of each limiting plate, two round holes are formed in one end of each limiting plate, and the two round holes are communicated with the pipeline. The interior of the round hole is slidably connected with the steel strand body, one end of the limiting plate is slidably connected with two internal thread rings, the interiors of the internal thread rings are in threaded connection with six external thread plates, and one side of each external thread plate is fixedly connected with an extrusion block. The problems that a traditional retard-bonded prestressed steel strand is not stable in position in a pipeline, prestress formed by the steel strand changes, and the tensioning effect of the steel strand after prestress tensioning cannot be kept are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed brackets, in particular to a slow-bonding prestressed steel strand fixing structure. Background Art

[0002] Prestressing is the compressive stress pre-applied to the structure during construction in order to improve its service performance.

[0003] The conventional slow-bonding prestressed steel strands in the prior art are placed in an unstable position inside the pipe, so the prestress formed by the steel strands will change, and the prestressing effect of the steel strands after tensioning cannot be maintained. Utility Model Content

[0004] The purpose of the utility model is to solve the disadvantages of the conventional slow-bonding prestressed steel strand in the prior art that the position of the steel strand placed inside the pipeline is not stable, so the prestress formed by the steel strand will change, and a slow-bonding prestressed steel strand fixing structure is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a slow-bonding prestressed steel strand fixing structure, including a pipeline and a steel strand body, two ends of the pipeline are provided with fixing devices, the fixing device includes two limit plates, the side of the two limit plates close to each other is slidably connected to the pipeline, one end of the limit plate is provided with a perfusion hole, one end of the limit plate is provided with two circular holes, the interior of the circular holes is slidably connected to the steel strand body, one end of the limit plate is slidably connected to two internal threaded rings, the internal threads of the internal threaded rings are connected to six external threaded plates, one side of the external threaded plate is fixedly connected to an extrusion block, one side of the six extrusion blocks is slidably connected to the steel strand body, one end of the six external threaded plates is fixedly connected to a fixing cylinder, the interior of the fixing cylinder is slidably connected to an assembly cylinder, and the interior of the assembly cylinder is fixedly connected to the steel strand body.

[0006] The effect achieved by the above components is: the internal thread ring is rotated to make the internal thread ring rotate on the external thread plate, so that one end of the external thread plate drives the extrusion block to move toward the steel strand body until the extrusion block squeezes and fixes the steel strand body.

[0007] Preferably, the arc surface of the assembly cylinder is provided with six slide grooves, the interior of the slide grooves is slidably connected with slide bars, and one side of the six slide bars is fixedly connected to the fixing cylinder.

[0008] The effect achieved by the above components is that the fixed cylinder moves to drive the slide bar to slide in the slide groove.

[0009] Preferably, one end of the internal thread ring away from the limiting plate is fixedly connected with a fixing ring, the interior of the fixing ring is rotatably connected to the fixing cylinder, and the exterior of the fixing ring is fixedly connected with a nut.

[0010] The effect achieved by the above components is that the rotation of the nut drives the fixing ring to rotate on the fixing cylinder, thereby causing the internal thread ring to rotate.

[0011] Preferably, a supporting device is provided outside the steel strand body, and the supporting device comprises a supporting plate, and telescopic rods are fixedly connected to both sides of the supporting plate.

[0012] The effects achieved by the above components are: the support plate and the telescopic rod are fixed.

[0013] Preferably, an output end of the telescopic rod is fixedly connected with an elastic arc plate, and the inner side of the elastic arc plate is slidably connected to the steel strand body.

[0014] The effect achieved by the above components is that the telescopic rod is extended and retracted to drive the elastic arc plate to move in a direction away from or close to the steel strand body.

[0015] Preferably, the arc surface of the telescopic rod is sleeved with a spring, and two ends of the spring are respectively fixedly connected to the support plate and the elastic arc plate.

[0016] The effect achieved by the above components is that the telescopic rod prevents the spring from deforming during the stretching or contraction process.

[0017] Preferably, the two elastic arc-shaped plates are slidably connected to a sliding rod on one side away from each other.

[0018] The effect achieved by the above components is: the sliding rod slides on the elastic arc plate, thereby limiting the elastic arc plate.

[0019] Preferably, both ends of the sliding rod are fixedly connected to limit blocks.

[0020] The effects achieved by the above components are: the limiting block and the sliding rod are fixed.

[0021] Preferably, the arc surface of the sliding rod is slidably connected to a fixing plate, and the sides of the two fixing plates close to each other are fixedly connected to the supporting plate.

[0022] The effect achieved by the above components is: the sliding effect on the slide bar fixing plate is achieved.

[0023] In summary, the beneficial effects of the utility model are:

[0024] In the utility model, when it is necessary to fix the steel strand to maintain the original prestress, the internal thread ring moves on the external thread plate, so that the external thread plate drives the extrusion block to approach the steel strand body until the extrusion block squeezes and fixes the steel strand body. The fixing device solves the problem that the traditional slow-bonding prestressed steel strand is placed in an unstable position inside the pipeline, the prestress formed by the steel strand will change, and the prestressed tensioning effect of the steel strand cannot be maintained.

[0025] In the utility model, when it is necessary to prevent multiple steel strands from being entangled with each other, the elastic arc plate and the steel strand body are contacted and limited by the supporting device. The supporting device solves the problem that multiple steel strands placed together in traditional slow-bonding prestressed steel strands are prone to being entangled with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the fixed structure of the utility model;

[0028] Figure 3 It is a cross-sectional structural diagram of the three-dimensional structure of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the support structure of the utility model;

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing structure of the utility model.

[0031] Legend: 1. Pipe; 2. Fixing device; 201. Limiting plate; 202. Round hole; 203. Injection hole; 204. External thread plate; 205. Extrusion block; 206. Internal thread ring; 207. Fixing ring; 208. Nut; 209. Fixing cylinder; 210. Slide bar; 211. Slide groove; 212. Assembly cylinder; 3. Support device; 31. Fixing plate; 32. Support plate; 33. Telescopic rod; 34. Spring; 35. Elastic arc plate; 36. Slide rod; 37. Limiting block; 4. Steel strand body. DETAILED DESCRIPTION

[0032] Reference Figure 1 and Figure 3 As shown, the utility model provides a technical solution: a slow-bonding prestressed steel strand fixing structure, comprising a pipeline 1 and a steel strand body 4, fixing devices 2 are provided at both ends of the pipeline 1, and a supporting device 3 is provided outside the steel strand body 4.

[0033] The specific configuration and function of the fixing device 2 and the supporting device 3 are described in detail below.

[0034] Reference Figure 2 and Figure 5 As shown, in this embodiment: the fixing device 2 includes two limit plates 201, and the side of the two limit plates 201 close to each other is slidably connected to the pipeline 1, one end of the limit plate 201 is provided with a perfusion hole 203, and one end of the limit plate 201 is provided with two circular holes 202, the inside of the circular holes 202 is slidably connected to the steel strand body 4, one end of the limit plate 201 is slidably connected to two internal threaded rings 206, the internal threads of the internal threaded rings 206 are connected to six external threaded plates 204, one side of the external threaded plate 204 is fixedly connected to an extrusion block 205, one side of the six extrusion blocks 205 is slidably connected to the steel strand body 4, one end of the six external threaded plates 204 is fixedly connected to a fixing cylinder 209, the inside of the fixing cylinder 209 is slidably connected to an assembly cylinder 212, and the inside of the assembly cylinder 212 is fixedly connected to the steel strand body 4. The internal thread ring 206 is rotated to rotate on the external thread plate 204, so that one end of the external thread plate 204 drives the extrusion block 205 to move toward the steel strand body 4 until the extrusion block 205 squeezes and fixes the steel strand body 4. The arc surface of the assembly cylinder 212 is provided with six slide grooves 211, and the slide bars 210 are slidably connected inside the slide grooves 211, and one side of the six slide bars 210 is fixedly connected to the fixed cylinder 209. The fixed cylinder 209 moves to drive the slide bars 210 to slide in the slide grooves 211. The end of the internal thread ring 206 away from the limit plate 201 is fixedly connected to the fixing ring 207, the inside of the fixing ring 207 is rotatably connected to the fixing cylinder 209, and the outside of the fixing ring 207 is fixedly connected to the nut 208. The rotation of the nut 208 drives the fixing ring 207 to rotate on the fixing cylinder 209, so that the internal thread ring 206 rotates.

[0035] Reference Figure 4As shown, in this embodiment: the support device 3 includes a support plate 32, and both sides of the support plate 32 are fixedly connected with a telescopic rod 33. The effect of fixing the support plate 32 and the telescopic rod 33 is achieved. The output end of the telescopic rod 33 is fixedly connected with an elastic arc plate 35, and the inner side of the elastic arc plate 35 is slidably connected with the steel strand body 4. The effect of the telescopic rod 33 telescopically driving the elastic arc plate 35 to move away from or close to the steel strand body 4 is achieved. The circular arc surface of the telescopic rod 33 is sleeved with a spring 34, and the two ends of the spring 34 are respectively fixedly connected to the support plate 32 and the elastic arc plate 35. The effect of preventing the spring 34 from deforming during the stretching or contraction process is achieved. The two sides of the two elastic arc plates 35 that are away from each other are slidably connected with a slide bar 36. The slide bar 36 slides on the elastic arc plate 35 to limit the elastic arc plate 35. Both ends of the slide bar 36 are fixedly connected to the limit block 37. The effect of fixing the limit block 37 and the slide bar 36 is achieved. The arc surface of the slide bar 36 is slidably connected with the fixing plate 31, and the sides of the two fixing plates 31 close to each other are fixedly connected with the support plate 32. The slide bar 36 slides on the fixing plate 31.

[0036] Working principle: through the fixing device 2, when it is necessary to fix the steel strand to maintain the original prestress, the operator first fixes the two ends of the steel strand and the assembly tube 212, places the assembly tube 212 inside the fixing tube 209, pulls the assembly tube 212 in the direction in which the assembly tubes 212 are away from each other, so that the steel strand body 4 is stretched and straightened, and the nut 208 is turned, and the nut 208 drives the fixing ring 207 to rotate, and the fixing ring 207 drives the internal thread ring 206 to rotate, and the internal thread ring 206 moves on the external thread plate 204, so that the external thread plate 204 drives the extrusion block 205 to approach the steel strand body 4 until the extrusion block 205 squeezes and fixes the steel strand body 4. After the fixing is completed, the steel strand body 4 always maintains the prestress after tensioning. Through the fixing device 2, the problem of traditional slow-bonding prestressed steel strands, the position placed inside the pipeline 1 is not stable, the prestress formed by the steel strand will change, and the prestressed tensioning effect of the steel strand cannot be maintained.

[0037] Through the support device 3, when it is necessary to prevent multiple steel strands from being entangled with each other, the operator first moves the support plate 32 between the multiple steel strand bodies 4, and moves the sliding rod 36 in the direction away from the elastic arc plate 35. After the sliding rod 36 is completely away from the elastic arc plate 35, the spring 34 rebounds and drives the elastic arc plate 35 to move in the direction of the steel strand body 4, so that the elastic arc plate 35 and the steel strand body 4 are in contact and limited. Through the support device 3, the problem of traditional slow-bonding prestressed steel strands that multiple steel strands placed together are prone to entanglement with each other is solved.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A slow-bonding prestressed steel strand fixing structure, comprising a pipe (1) and a steel strand body (4), characterized in that: The two ends of the pipeline (1) are provided with fixing devices (2), the fixing devices (2) comprising two limiting plates (201), the sides of the two limiting plates (201) close to each other being slidably connected to the pipeline (1), one end of the limiting plate (201) being provided with a pouring hole (203), one end of the limiting plate (201) being provided with two circular holes (202), the inside of the circular holes (202) being slidably connected to the steel strand body (4), one end of the limiting plate (201) being slidably connected to two internal threaded rings (203), and one end of the limiting plate (201) being provided with a filling hole (203). 06), the internal thread of the internal thread ring (206) is connected to six external thread plates (204), one side of the external thread plate (204) is fixedly connected to an extrusion block (205), one side of the six extrusion blocks (205) is slidably connected to the steel strand body (4), one end of the six external thread plates (204) is fixedly connected to a fixing cylinder (209), the interior of the fixing cylinder (209) is slidably connected to an assembly cylinder (212), and the interior of the assembly cylinder (212) is fixedly connected to the steel strand body (4).

2. A slow-bonding prestressed steel strand fixing structure according to claim 1, characterized in that: The arc surface of the assembly cylinder (212) is provided with six sliding grooves (211), the interior of the sliding grooves (211) is slidably connected with a sliding bar (210), and one side of the six sliding bars (210) is fixedly connected to the fixed cylinder (209).

3. The slow-bonding prestressed steel strand fixing structure according to claim 1 is characterized in that: One end of the internal threaded ring (206) away from the limiting plate (201) is fixedly connected to a fixing ring (207), the interior of the fixing ring (207) is rotatably connected to a fixing cylinder (209), and the exterior of the fixing ring (207) is fixedly connected to a nut (208).

4. The slow-bonding prestressed steel strand fixing structure according to claim 1 is characterized in that: A support device (3) is provided outside the steel strand body (4), wherein the support device (3) comprises a support plate (32), and telescopic rods (33) are fixedly connected to both sides of the support plate (32).

5. A slow-bonding prestressed steel strand fixing structure according to claim 4, characterized in that: The output end of the telescopic rod (33) is fixedly connected to an elastic arc plate (35), and the inner side of the elastic arc plate (35) is slidably connected to the steel strand body (4).

6. A slow-bonding prestressed steel strand fixing structure according to claim 5, characterized in that: The arc surface of the telescopic rod (33) is sleeved with a spring (34), and two ends of the spring (34) are respectively fixedly connected to the support plate (32) and the elastic arc plate (35).

7. The slow-bonding prestressed steel strand fixing structure according to claim 6 is characterized in that: The two elastic arc-shaped plates (35) are slidably connected to a sliding rod (36) on one side away from each other.

8. The slow-bonding prestressed steel strand fixing structure according to claim 7, characterized in that: Both ends of the sliding rod (36) are fixedly connected to limit blocks (37).

9. A slow-bonding prestressed steel strand fixing structure according to claim 8, characterized in that: The arc surface of the sliding rod (36) is slidably connected to a fixing plate (31), and the sides of the two fixing plates (31) close to each other are fixedly connected to a supporting plate (32).

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