Post-tensioned prestressed pipe blockage dredging tool

Abstract

The utility model discloses a post-tensioned prestressed pipeline blockage dredging tool, and belongs to the technical field of building construction devices. The device comprises a base arranged close to the prestressed pipeline; a fixed support is mounted at the upper part of the base; a cantilever-shaped fixed shaft is mounted on the fixed support; one end of the fixed shaft can be inserted into the prestressed pipeline, and a hollow functional bin is further installed at the end of the fixed shaft. The function bin is of a cylindrical structure, and the contour shape of the peripheral side of the function bin is consistent with the shape of an inner cavity of the prestressed pipeline. A rotating motor is arranged in the functional bin; the rotating motor is mounted on the fixed shaft and can drive the functional bin to rotate; tunneling teeth are arranged on the side end face, facing the extending direction of the prestressed pipeline, of the functional bin, and a blocking piece capable of being opened and closed is arranged on the side end face; the utility model effectively solves the technical problems that the blockage point in the current prestressed pipeline cannot be accurately positioned, and the chiseling concrete secondary pouring is easy to generate cold seams.

Description

Technical Field

[0001] The utility model relates to the technical field of construction devices, and particularly relates to a pipe blocking and dredging tool for post-tensioned prestressed pipes. Background Art

[0002] In the field of building construction, prestressed concrete is widely used. Prestressed concrete is constructed by the pretensioning method and the post-tensioning method. In the post-tensioning method, generally, corrugated pipes are pre-buried in the formwork. After the concrete is poured and reaches the specified strength (generally not less than 75% of the design strength), steel bars or steel cables are passed through the corrugated pipes and clamped with fixed anchorages for tensioning. Finally, cement slurry is poured into the ducts to form an integral body between the prestressed tendons and the concrete members. However, during the construction process, it usually occurs that the socket joints of the corrugated pipes are not firmly sleeved and are easily disconnected and leak slurry, there are local damages, or they are stepped on, squeezed, or flattened during construction, and the inside of the pipes is blocked by cement slurry, making it impossible to carry out the prestressed tendon tensioning operation. The conventional dredging method usually involves chiseling the concrete at that place for dredging, but this method is difficult to locate the blockage position for secondary pouring; and this is also the problem that urgently needs to be solved at present. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a pipe blocking and dredging tool for post-tensioned prestressed pipes to solve the technical problems that the blockage points in the prestressed corrugated pipes cannot be accurately located and cold joints are easily generated during the secondary pouring of chiseled concrete.

[0004] To solve the above problems, the utility model provides the following technical solutions:

[0005] A pipe blocking and dredging tool for post-tensioned prestressed pipes; it includes a base disposed close to the prestressed pipe; a fixed support is installed on the upper part of the base; a fixed shaft in a cantilever shape is installed on the fixed support; one end of the fixed shaft can be inserted into the prestressed pipe, and a functionally hollow functional chamber is also installed at the end of the fixed shaft; the functional chamber is in a cylindrical structure, and the contour shape of its outer peripheral side is consistent with the inner cavity shape of the prestressed pipe; a rotating motor is built in the functional chamber, the rotating motor is installed on the fixed shaft, and the rotating motor can drive the functional chamber to rotate; cutting teeth are arranged on the side end surface of the functional chamber facing the extending direction of the prestressed pipe, and an openable and closable baffle is arranged on this side end surface.

[0006] Preferably, the base is an assembled base with adjustable height; rollers are arranged at the bottom of the base, and brake pads for controlling their movement are arranged on the rollers.

[0007] Preferably, a front support opposite to the fixed support is installed on the fixed shaft; the front support can move axially along the fixed shaft, and a plurality of electro-controlled telescopic arms are arranged on the outer peripheral side of the front support.

[0008] Further, a sliding support is installed on the front support; a support guide beam is installed between the sliding support and the fixed support; the support guide beam is arranged parallel to the fixed axis; the sliding support is movably installed on the support guide beam.

[0009] Further, the electric control telescopic arms are radially and evenly arranged on the front support, and the telescopic directions of the electric control telescopic arms are all arranged along the radial direction of the fixed axis.

[0010] Further, the fixed support includes a vertical frame; the lower parts of the vertical frame are respectively fixedly connected to the support guide beam and the base; a shaft platform is arranged on the end side of the vertical frame; the cross section of the support guide beam is a T-shaped structure; a T-shaped chute matching the support guide beam is arranged on the lower side of the sliding support.

[0011] Preferably, a terminal controller is further included; the terminal controller is respectively connected to the rotating motor and the electric control telescopic arms in the function bin through wires.

[0012] Preferably, the tunneling teeth are a row of spaced tooth-shaped structures arranged along the radial direction of the function bin.

[0013] Preferably, a tunneling probe is further installed at the central position of the end face of the tunneling teeth on the function bin; the outer contour of the tunneling probe is a conical structure, and the length of the tunneling probe is greater than the length of the tunneling teeth.

[0014] Advantages of the present utility model:

[0015] The present utility model has the advantages of simple structure, reliable performance, simple operation, recyclability, and can be dredged without concrete drilling. It can ensure accurate positioning of the blockage point of the prestressed pipeline, avoid cold joints caused by chiseling concrete for secondary pouring, effectively solve the problem of blocking of large-span prestressed pipelines, greatly improve the construction efficiency of prestressed steel tendon threading, and save construction costs and construction period. Description of the drawings

[0016] Figure 1 is the structural schematic diagram of the present utility model in the embodiment;

[0017] Figure 2 is Figure 1 the three-dimensional structural schematic diagram of the device in after removing the prestressed pipeline;

[0018] Figure 3 is Figure 2 the three-dimensional structural schematic diagram of the device in from another perspective;

[0019] Figure 4 is Figure 2 the schematic diagram of the device in when the electric control telescopic arms are in the fully retracted state;

[0020] Figure 5 is Figure 2Schematic diagram of the electro-controlled telescopic arm of the middle device in the extended state;

[0021] Description of reference numerals: 1. Support guide beam; 2. Fixed support; 3. Fixed shaft; 4. Sliding support; 5. Front support; 6. Electro-controlled telescopic arm; 7. Function bin; 8. Base; 9. Terminal controller; 10. Prestressed duct; 11. Boring teeth; 12. Boring pieces; 13. Boring probe. Detailed implementation manners

[0022] The following further introduces the present utility model in conjunction with the accompanying drawings and specific embodiments:

[0023] Embodiment:

[0024] Referring to Figure 1 , this embodiment provides a tool for dredging plugged post-tensioned prestressed ducts; it includes a base 8 disposed close to the prestressed duct 10; a fixed support 2 is installed on the upper part of the base 8; a fixed shaft 3 in a cantilever shape is installed on the fixed support 2; one end of the fixed shaft 3 can be inserted into the prestressed duct 10, and a function bin 7 with a hollow interior is also installed at the end of the fixed shaft 3; the function bin 7 is in a cylindrical structure, and the contour shape of its outer peripheral side is consistent with the inner cavity shape of the prestressed duct 10; a rotating motor is built in the function bin 7; the rotating motor is installed on the fixed shaft 3, and the rotating motor can drive the function bin 7 to rotate; boring teeth 11 are provided on the side end face of the function bin 7 facing the extending direction of the prestressed duct 10, and an openable and closable baffle 12 is provided on this side end face. The boring pieces 12 will open at a certain angle during operation to facilitate the entry of cement slurry blocks into the storage bin 7.

[0025] The base 8 is an assembled base with adjustable height; rollers are provided at the bottom of the base 8, and brake pads for controlling their movement are provided on the rollers. In this embodiment, the base 8 is a structure formed by splicing several rods, and it is detachably connected to the fixed support; the base 8 can also adjust its height according to the height of the prestressed duct to make the axis height of the fixed shaft consistent with that of the prestressed duct; in addition, the feeding action of the base 8 in this embodiment is controlled by an external action, and when not in the working state, the rollers need to be locked to prevent the base 8 from moving.

[0026] A front support 5 opposite to the fixed support 2 is installed on the fixed shaft 3; the front support 5 can move along the axial direction of the fixed shaft 3, and several electro-controlled telescopic arms 6 are provided on the outer peripheral side of the front support 5.

[0027] A sliding support 4 is installed on the front support 5; a support guide beam 1 is installed between the sliding support 4 and the fixed support 2; the support guide beam 1 is arranged parallel to the fixed shaft 3; the sliding support 4 is movably installed on the support guide beam 1.

[0028] The electric control telescopic arms 6 are radially and evenly arranged on the front support 5, and the telescopic directions of the electric control telescopic arms 6 are all arranged along the radial direction of the fixed shaft 3. Through the radial telescopic action of the electric control telescopic arms 6, a certain supporting effect can be provided near the pipe blockage position on the prestressed pipeline.

[0029] The fixed support 2 includes a vertical frame; the lower parts of the vertical frame are respectively fixedly connected to the support guide beam 1 and the base 8; a shaft platform is arranged on the end side of the vertical frame; the cross section of the support guide beam 1 is a T-shaped structure; a T-shaped chute matching with the support guide beam 1 is arranged on the lower side of the sliding support 4.

[0030] It further includes a terminal controller 9; the terminal controller 9 is respectively connected to the rotating motor and the electric control telescopic arm 6 in the function bin 7 through wires.

[0031] The tunneling teeth 11 are a row of spaced tooth-shaped structures arranged along the radial direction of the function bin 7.

[0032] A tunneling probe 13 is also installed at the central position of the end face of the tunneling teeth 11 on the function bin 7; the outer contour of the tunneling probe 13 is a conical structure, and the length of the tunneling probe 13 is greater than the length of the tunneling teeth 11.

[0033] When using the utility model device in this embodiment, the following operation process can be carried out:

[0034] When it is found that the prestressed pipeline 10 is blocked, the base 8 is assembled and erected according to the pipeline height, and other corresponding structures are installed; the function bin, the support guide beam and the fixed shaft are all sent into the prestressed pipeline 10 by moving the base 8 until the end of the function bin abuts against the blockage point. At this time, the tunneling blades of the function bin are in the open state; then control the sliding support 4 and the front support 5 to move forward in the direction of the blockage of the prestressed pipeline 10 and stop moving at a position at a certain distance from the function bin; issue an elongation command to the electric control telescopic arm 6 through the terminal controller 9; make the extended end of the electric control telescopic arm 6 support on the inner wall of the prestressed pipeline 10 to play a supporting and protecting role. At this time, the tunneling probe 13 has extended into the cement slurry block and played a certain positioning effect; then control the motor in the function bin 7 to rotate through the terminal controller 9; thereby driving the tunneling teeth 11 to continuously operate to break the blockage point into cement slurry blocks of different sizes. The cement slurry blocks enter the function bin 7 through the opened window at the tunneling blade 12. When the dredging is completed or the function bin 7 is full, the motor stops rotating and the electric control telescopic arm retracts; the operator retreats the overall structure along the axial direction of the pipeline to make the function bin leave the pipeline for disassembly and cleaning; then repeat the above steps to complete the dredging.

Claims

1. A post-tensioned prestressed pipe blocking and unblocking tool, characterized by: It comprises a base (8) arranged near a prestressed pipe (10); a fixed support (2) is installed on the upper part of the base (8); a cantilevered fixed shaft (3) is installed on the fixed support (2); one end of the fixed shaft (3) can be inserted into the prestressed pipe (10), and an internally hollow functional chamber (7) is also installed at the end of the fixed shaft (3); the functional chamber (7) is a cylindrical structure, and the contour shape of its outer peripheral side is consistent with the inner cavity shape of the prestressed pipe (10); a rotating motor is built in the functional chamber (7); the rotating motor is installed on the fixed shaft (3), and the rotating motor can drive the functional chamber (7) to rotate; a tunneling tooth (11) is arranged on the side end surface of the functional chamber (7) facing the extension direction of the prestressed pipe (10), and an openable and closable baffle (12) is arranged on the side end surface.

2. A post-tensioning prestressed pipe blocking and unblocking tool according to claim 1, characterized in that: The base (8) is an assembled base with adjustable height; a roller is arranged at the bottom of the base (8), and a brake pad for controlling the movement of the roller is arranged on the roller.

3. A post-tensioning prestressed pipe blocking and unblocking tool according to claim 1, characterized in that: A front end support (5) opposite to the fixed support (2) is mounted on the fixed shaft (3); the front end support (5) is movable along the axial direction of the fixed shaft (3), and a plurality of electrically controlled telescopic arms (6) are arranged on the outer peripheral side of the front end support (5).

4. A post-tensioning prestressed pipe blocking and unblocking tool according to claim 3, characterized in that: A sliding support (4) is mounted on the front support (5); a support guide beam (1) is mounted between the sliding support (4) and the fixed support (2); the support guide beam (1) is arranged parallel to the fixed axis (3); and the sliding support (4) is movably mounted on the support guide beam (1).

5. The post-tensioning prestressed pipe blocking and unblocking tool according to claim 3 is characterized by: The electrically controlled telescopic arms (6) are evenly arranged on the front end support (5) in a radial shape, and the telescopic direction of each electrically controlled telescopic arm (6) is arranged along the radial direction of the fixed axis (3).

6. A post-tensioning prestressed pipe blocking and unblocking tool according to claim 4, characterized in that: The fixed support (2) comprises a stand; the lower part of the stand is respectively fixedly connected to the support guide beam (1) and the base (8); a shaft platform is arranged at the end side of the stand; the cross section of the support guide beam (1) is a T-shaped structure; and a T-shaped slide groove matching the support guide beam (1) is arranged at the lower side of the sliding support (4).

7. The post-tensioning prestressed pipe blocking and unblocking tool according to claim 1, characterized in that: It also includes a terminal controller (9); the terminal controller (9) is connected to the rotating motor and the electric-controlled telescopic arm (6) in the functional compartment (7) through wires.

8. The post-tensioning prestressed pipe blocking and unblocking tool according to claim 1, characterized in that: The excavation teeth (11) are tooth-shaped structures arranged in a row and spaced apart in a radial direction of the functional chamber (7).

9. The post-tensioning prestressed pipe blocking and unblocking tool according to claim 1, characterized in that: A tunneling probe (13) is also installed at the center of the end surface of the tunneling tooth (11) arranged on the functional chamber (7); the outer contour of the tunneling probe (13) is a conical structure, and the length of the tunneling probe (13) is greater than the length of the tunneling tooth (11).

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