Cast-in-place beam prestressed reinforcement grouting exhaust device

Abstract

The invention relates to the technical field of building construction, and discloses a cast-in-place beam prestressed reinforcement grouting exhaust device which comprises prestressed anchor seats, plug assemblies and grouting pipes, and is characterized in that the prestressed anchor seats are arranged at the two ends in a prestressed reinforcement pipeline in a concrete structure; the pre-stressed anchor base is used for fixing the two ends of a pre-stressed steel bar, a containing cavity for containing the plug assemblies is formed in the pre-stressed anchor base, the plug assemblies can be fixed to one end of the grouting pipe, and the two plug assemblies are matched with the grouting pipe to complete grouting operation. Compared with traditional grouting equipment, the grouting path is effectively shortened, so that the grouting efficiency is improved to a great extent, meanwhile, the plug assemblies conduct reverse extrusion on cement grout during grouting, the filling effect between the cement grout and prestressed steel bars during grouting is guaranteed, bubbles are effectively avoided, the grouting efficiency can be improved, and the grouting quality is improved. And the grouting quality can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a grouting exhaust device for prestressed steel bars of a cast-in-place beam. Background Art

[0002] Prestressed steel bars are applied to the steel bars by pulling them, applying a certain degree of tensile stress to them, and then grouting between the steel bars and the concrete structure. After the concrete solidifies to the required strength, the tensile stress is removed, thereby applying prestress to the concrete structure by using the force of the steel bars shrinking after the tensile stress is removed, which can effectively improve the tensile strength of the concrete structure. Prestressed steel bars are particularly important in bridges for some beam structures that need to withstand large tensile forces.

[0003] Prestressed steel bar construction is divided into pre-tensioning and post-tensioning. In cast-in-place beam construction, the construction process of pre-tensioning is relatively simple, but pre-tensioning requires fixed pedestal equipment and has large construction restrictions, while post-tensioning does not require fixed pedestal equipment, is flexible in production, and is suitable for the production of large prestressed concrete components. However, when using the post-tensioning method for prestressed steel bar installation, the difficulty of grouting will increase significantly. Therefore, the two construction methods have their own advantages and disadvantages, and are used in different usage scenarios.

[0004] In the post-tensioning production of cast-in-place beams, a pipe for the prestressed steel bars will be left in the cast-in-place beam. After the cement outside the pipe solidifies, the prestressed steel bars are passed through the pipe, and then prestress is applied to the prestressed steel bars. After the prestress is applied, the gap between the prestressed steel bars and the pipe is filled by grouting. However, the current grouting device can easily lead to loose filling between the steel bars and the cement slurry, resulting in too many bubbles between the steel bars and the cement. These bubbles will seriously hinder the stress transfer between the steel bars and the concrete structure, resulting in excessive prestress loss. The current grouting equipment is difficult to solve the problem of bubble discharge during grouting of prestressed steel bars. Summary of the invention

[0005] The present invention aims to provide a grouting exhaust device for prestressed steel bars of cast-in-place beams, so as to solve the problem of difficulty in exhausting bubbles during the grouting construction of prestressed steel bars by post-tensioning method.

[0006] The present invention is achieved through the following technical solutions:

[0007] A grouting exhaust device for prestressed steel bars of cast-in-place beams, comprising a prestressed anchor seat, a plug assembly and a grouting pipe, characterized in that the prestressed anchor seats are arranged at both ends of a prestressed steel bar pipeline in a concrete structure, the prestressed anchor seats are used to fix both ends of the prestressed steel bars, the prestressed anchor seats are provided with a accommodating cavity for accommodating the plug assembly, the plug assembly can be fixed to one end of the grouting pipe, the plug assembly is a cylinder as a whole, the outer diameter of the plug assembly is the same as the inner diameter of the steel bar channel, the plug assembly comprises a first baffle, a sponge sealing layer and a second baffle, and the sponge sealing layer is arranged between the first baffle and the second baffle.

[0008] In a possible design, the grouting pipe is also connected to the grouting equipment, and two plug assemblies are provided at both ends of each prestressed steel bar pipe, and one end of the grouting pipe is fixed to each of the two plug assemblies.

[0009] In a possible design, the sponge sealing layer cooperates with the inner wall of the prestressed steel pipe and the prestressed steel bars to achieve a certain sealing effect. The plug assembly is also fixed to one end of the exhaust pipe, and the other end of the exhaust pipe is fixed to the vacuum suction equipment. One end of the exhaust pipe at the plug assembly is placed in the sponge sealing layer, and the sponge sealing layer can block the invasion of cement slurry at the port position of the exhaust pipe. The second partition is provided with a center hole at the center position, and prestressed steel bars are passed through the center hole. At the same time, the diameter of the center hole is larger than the diameter of the prestressed steel bars, so that there is a gap between the second partition and the prestressed steel bars.

[0010] In a possible design, the plug assembly includes a grouting pipe joint, which is fixedly connected to the first partition and the second partition, and the grouting pipe joint is used for detachable connection with the grouting pipe. The plug assembly also includes an air intake pipe joint, and the air intake pipe joint is also detachably connected to the exhaust pipe.

[0011] In a possible design, the prestressed anchor seat includes a steel bar fixing seat, a support rod and a support base, and a plurality of support rods are evenly arranged in a ring between the steel bar fixing seat and the support base. The support rods, the steel bar fixing seat and the support base cooperate to form a receiving space for accommodating the plug assembly.

[0012] In a possible design, a pipe delivery assembly is also included, which includes a mounting plate and two clamping drive mechanisms arranged on both sides of the mounting plate, and the clamping drive mechanisms are fixedly connected to the mounting plate through a connecting arm.

[0013] In a possible design, the clamping drive mechanism is fixedly connected to the mounting plate via a connecting arm, the clamping drive mechanism comprises a reduction drive motor, an active clamping roller and a driven clamping roller, the fixed distance between the driven clamping roller and the active clamping roller is adjustable, the motor shaft of the reduction drive motor is fixed to the active clamping roller, the motor housing of the reduction drive motor is fixed to the connecting arm, a connecting shaft is fixed to the connecting arm, a sliding sleeve block is slidably provided on the connecting shaft, a fixing knob is provided on the sliding sleeve block, the fixing knob is threadedly connected to the sliding sleeve block, two sliding sleeve blocks are provided at opposite ends of the driven clamping roller, and the end of the driven clamping roller is rotatably connected to the sliding sleeve block.

[0014] In a possible design, a plurality of positioning columns are fixedly provided on the prestressed anchor seat, the mounting plate is provided with through holes having the same number as the positioning columns, each positioning column is also provided with a notch, and a snap-fit ​​piece is fixed on the fixing ring. After the positioning column is inserted into the through hole on the mounting plate, the fixing ring is fitted with the mounting plate, and the fixing ring is rotated to move the snap-fit ​​piece into the notch on the positioning column.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] The present invention completes the grouting operation by cooperating with two plugging components and a grouting pipe. Compared with traditional grouting equipment, the grouting path is effectively shortened, thereby greatly improving the grouting efficiency. At the same time, the plugging component also reversely extrudes the cement slurry during grouting, thereby ensuring the filling effect between the cement slurry and the prestressed steel bars during grouting, effectively avoiding the generation of bubbles, and can not only improve the grouting efficiency, but also effectively improve the grouting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the structure when the present invention is used;

[0019] Figure 2 It is a structural schematic diagram of a prestressed anchor seat in an embodiment of the present invention;

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the first baffle in an embodiment of the present invention;

[0022] Figure 5It is a schematic diagram of the structure of the prestressed anchor seat and the fixing ring in an embodiment of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a delivery pipe assembly in an embodiment of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure after the pipe delivery assembly is installed on the prestressed anchor seat in an embodiment of the present invention.

[0025] The reference numerals represent: 1-prestressed anchor seat, 101-rebar fixing seat, 102-support rod, 103-support base, 2-plug assembly, 201-first partition, 202-sponge sealing layer, 203-second partition, 2031-center hole, 3-grouting pipe, 4-exhaust pipe, 5-grouting pipe joint, 6-fixing ring, 601-clamping piece, 7-positioning column, 8-mounting plate, 801-connecting arm, 9-reduction drive motor, 10-active clamping roller, 11-driven clamping roller, 12-connecting shaft, 13-sliding sleeve block, 14-fixing knob. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0027] Examples, such as Figures 1 to 7 As shown, this embodiment includes a prestressed anchor seat 1, a plug assembly 2 and a grouting pipe 3, wherein the prestressed anchor seat 1 is arranged at both ends of a prestressed steel bar pipeline in a concrete structure, and the prestressed anchor seat 1 is used to fix both ends of the prestressed steel bar, and a receiving cavity for accommodating the plug assembly 2 is provided in the prestressed anchor seat 1, and the plug assembly 2 can be fixed to one end of the grouting pipe 3, and the plug assembly 2 is a cylindrical body as a whole, and the outer diameter of the plug assembly 2 is the same as the inner diameter of the steel bar channel. When in use, the plug assembly 2 is sleeved on the prestressed steel bar, and the plug assembly 2 can slide in the prestressed steel bar pipeline;

[0028] The grouting pipe 3 is also connected to the grouting equipment. When the grouting pipe 3 is connected to the grouting equipment, the grouting equipment performs grouting filling into the prestressed steel bar pipe through the grouting pipe 3. Two plug assemblies 2 are provided at both ends of each prestressed steel bar pipe. One end of the grouting pipe 3 is fixed on the two plug assemblies 2. Before grouting, the two plug assemblies 2 are inserted into the two ends of the prestressed steel bar pipe. When the grouting pipes 3 at both ends of the prestressed steel bar pipe are pushed, the two plug assemblies 2 quickly approach each other under the push of the grouting pipe 3 and finally contact in the middle position of the prestressed steel bar pipe. After the two plug assemblies 2 approach and contact each other, the two grouting pipes 3 are connected to the grouting equipment for grouting. The cement slurry injected from the grouting pipe 3 enters between the two plug assemblies 2. The cement slurry fills the prestressed steel bar pipe and the prestressed steel bar between the two plug assemblies 2, and pushes the two plug assemblies 2 away from each other during filling.

[0029] It should be noted that the operation of simultaneously grouting between the two plug assemblies 2 can greatly shorten the grouting path, which is only half of the original one, and can effectively increase the grouting speed. At the same time, the cement slurry needs to push the two plug assemblies 2 to move. The resistance encountered by the two plug assemblies 2 during movement reversely squeezes the cement slurry, which can make the filling between the cement slurry and the prestressed steel bars tighter, and can effectively eliminate bubbles during the grouting process of the prestressed steel bars, ensuring uniform filling of the slurry and improving the overall strength of the structure.

[0030] Furthermore, the plug assembly 2 includes a first partition 201, a sponge sealing layer 202 and a second partition 203, the sponge sealing layer 202 is arranged between the first partition 201 and the second partition 203, the sponge sealing layer 202 cooperates with the inner wall of the prestressed steel pipe and the prestressed steel to achieve a certain sealing effect, the plug assembly 2 is also fixed to one end of the exhaust pipe 4, the other end of the exhaust pipe 4 is fixed to the vacuum suction equipment, one end of the exhaust pipe 4 at the plug assembly 2 is placed in the sponge sealing layer 202, the sponge sealing layer 202 can block the intrusion of cement slurry at the port position of the exhaust pipe 4, the second partition 203 is provided with a center hole at the center position, the center hole is penetrated with prestressed steel bars, and the diameter of the center hole is larger than the diameter of the prestressed steel bars, so that There is a gap between the second partition 203 and the prestressed steel bar, and the sponge sealing layer 202 is a conveying breathable structure. The sponge sealing layer 202 can prevent cement slurry from entering the exhaust pipe 4 but will not prevent the air around the cement slurry from entering the exhaust pipe 4. During the suction process of the vacuum suction equipment of the exhaust pipe 4, the air between the second partition 203 and the prestressed steel bar and the air between the second partition 203 and the prestressed steel bar pipe wall will be continuously sucked into the exhaust pipe 4. Under the action of the exhaust pipe 4, negative pressure is formed at these two positions, resulting in thin air. During the grouting process, these two positions are also the positions where cement slurry and the prestressed steel bar pipe wall and cement slurry and prestressed steel bar are continuously filled. This can effectively avoid the generation of bubbles between the cement slurry and the prestressed steel bar during grouting, which can not only improve the grouting efficiency, but also greatly improve the grouting quality and reduce prestress loss.

[0031] In this embodiment, the plug assembly 2 includes a grouting pipe joint 5, which is fixedly connected to the first partition plate 201 and the second partition plate 203. The grouting pipe joint 5 is used for detachable connection with the grouting pipe 3. The plug assembly 2 also includes an air intake pipe joint, which is also detachably connected to the exhaust pipe 4. Before grouting is performed, the ends of the exhaust pipe 4 and the grouting pipe 3 can be removed from the plug assembly 2. Only when grouting is performed, the grouting pipe 3 and the exhaust pipe 4 are connected to the plug assembly 2.

[0032] It should be noted that the sponge sealing layer 202 can provide a certain sealing effect when the vacuum suction equipment is sucking, and the sealing effect refers to blocking the cement slurry to prevent the cement slurry from overflowing from the plug assembly 2. In addition, the sponge sealing layer 202 can also generate a large friction resistance between the prestressed steel bars and the prestressed steel bar pipe wall, so that the cement slurry between the two plug assemblies 2 can be filled better.

[0033] In this embodiment, the prestressed anchor seat 1 includes a steel bar fixing seat 101, a support rod 102 and a support base 103. There are multiple support rods 102 in a uniform ring between the steel bar fixing seat 101 and the support base 103. The support rods 102, the steel bar fixing seat 101 and the support base 103 cooperate to form a accommodating space for accommodating the plug assembly 2. After grouting in the prestressed steel bar pipeline is completed, the plug assembly 2 is also completely withdrawn from the prestressed steel bar pipeline. The accommodating space is used to temporarily accommodate the plug assembly 2. After the cement slurry solidifies, the prestressed anchor seat 1 can be disassembled, and the plug assembly 2 can be removed at this time so that the plug assembly 2 can be used multiple times.

[0034] Furthermore, in order to facilitate the rapid and smooth insertion of the plug assembly 2 into the prestressed steel pipe, a pipe delivery assembly is also provided for pushing the grouting pipe 3 and the exhaust pipe 4 into the prestressed steel pipe. The pipe delivery assembly includes a mounting plate 8 and two clamping drive mechanisms arranged on both sides of the mounting plate 8. The clamping drive mechanism is fixedly connected to the mounting plate 8 through a connecting arm 801. The clamping drive mechanism includes a reduction drive motor 9, an active clamping roller 10 and a driven clamping roller 11. The fixed distance between the driven clamping roller 11 and the active clamping roller 10 is adjustable. The motor shaft of the reduction drive motor 9 is fixed to the active clamping roller 10, and the motor housing of the reduction drive motor 9 is fixed to the connecting arm 801. A connecting shaft 12 is fixed to the connecting arm 801, and a sliding A sliding block 13 is provided, on which a fixed knob 14 is provided, and the fixed knob 14 is threadedly connected to the sliding block 13. Two sliding blocks 13 are provided at opposite ends of the driven clamping roller 11, and the end of the driven clamping roller 11 is rotatably connected to the sliding block 13. The sliding of the sliding block 13 on the connecting shaft 12 can drive the driven clamping roller 11 to slide along the connecting shaft 12, thereby changing the distance between the driven clamping roller 11 and the active clamping roller 10. An exhaust pipe 4 or a grouting pipe 3 is passed between the driven clamping roller 11 and the active clamping roller 10. After the exhaust pipe 4 or the grouting pipe 3 is passed between the active clamping roller 10 and the driven clamping roller 11, the active clamping roller 10 is controlled to rotate by the reduction drive motor 9 to drive the grouting pipe 3 or the exhaust pipe 4 to extend into the prestressed steel bar pipeline.

[0035] In this embodiment, the pipe delivery assembly is fixedly installed on the prestressed anchor seat 1. To facilitate the installation and disassembly of the pipe delivery assembly on the prestressed anchor seat 1, a plurality of positioning columns 7 are fixedly provided on the prestressed anchor seat 1. The mounting plate 8 is provided with through holes having the same number as the positioning columns 7. Each of the positioning columns 7 is also provided with a notch. A snap-fit ​​piece 601 is fixed on the fixing ring 6. After the positioning columns 7 are inserted into the through holes on the mounting plate 8, the fixing ring 6 is fit with the mounting plate 8. The fixing ring 6 is rotated to transfer the snap-fit ​​piece 601 into the notch on the positioning column 7, so that the pipe delivery assembly can be easily installed on the prestressed anchor seat 1 through the fixing ring 6.

[0036] When prestressing the prestressed steel bars during the construction of the cast-in-place beam prestressing, the prestressed steel bars are first passed through the prestressed steel bar pipeline, and then the plug assembly 2 is installed at both ends of the prestressed steel bar pipeline. After the plug assembly 2 is installed, the prestressed anchor seat 1 is installed at both ends of the prestressed steel bar, and then the prestressed steel bar is prestressed. When grouting is required, the delivery pipe assembly is installed on the prestressed anchor seat 1 at both ends of the prestressed steel bar pipeline that needs grouting, and then the grouting pipe 3 and the exhaust pipe 4 are inserted through the two ends of the delivery pipe assembly. The grouting pipe 3 and the grouting pipe joint 5 and the exhaust pipe 4 and the suction pipe joint can be directly plugged in. In the process of delivering the plug assembly 2 into the middle of the prestressed steel bar pipeline and the process of cement slurry pushing the plug assembly 2 out of the middle position of the prestressed steel bar pipeline, there is no situation where the grouting pipe 3 or the exhaust pipe 4 pulls the plug assembly 2. Therefore, this also makes the installation operation of the grouting pipe 3 and the exhaust pipe 4 on the plug assembly 2 simple, and there is no need for a threaded clamp structure to connect, which also improves the construction efficiency to a certain extent.

[0037] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A grouting exhaust device for prestressed steel bars of cast-in-place beams, comprising a prestressed anchor seat (1), a plug assembly (2) and a grouting pipe (3), characterized in that: The prestressed anchor seat (1) is arranged at both ends of the prestressed steel bar pipeline in the concrete structure, and the prestressed anchor seat (1) is used to fix the two ends of the prestressed steel bar; The prestressed anchor seat (1) is provided with a receiving cavity for receiving the plug assembly (2); the plug assembly (2) can be fixed to one end of the grouting pipe (3); the plug assembly (2) is a cylindrical body as a whole, and the outer diameter of the plug assembly (2) is the same as the inner diameter of the steel bar channel; The plug assembly (2) comprises a first partition plate (201), a sponge sealing layer (202) and a second partition plate (203), wherein the sponge sealing layer (202) is arranged between the first partition plate (201) and the second partition plate (203).

2. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The grouting pipe (3) is also connected to the grouting equipment. Two plugging components (2) are provided at both ends of each prestressed steel bar pipeline, and one end of the grouting pipe (3) is fixed to each of the two plugging components (2).

3. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The sponge sealing layer (202) cooperates with the inner wall of the prestressed steel pipe and the prestressed steel to achieve a certain sealing effect. The plug assembly (2) is also fixed to one end of the exhaust pipe (4), and the other end of the exhaust pipe (4) is fixed to the vacuum suction device. One end of the exhaust pipe (4) at the plug assembly (2) is placed in the sponge sealing layer (202). The sponge sealing layer (202) can block the intrusion of cement slurry at the port position of the exhaust pipe (4). The second partition (203) is provided with a center hole at the center position, and a prestressed steel bar is passed through the center hole. At the same time, the diameter of the center hole is larger than the diameter of the prestressed steel bar, so that there is a gap between the second partition (203) and the prestressed steel bar.

4. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The plug assembly (2) comprises a grouting pipe joint (5), wherein the grouting pipe joint (5) is fixedly connected to the first partition plate (201) and the second partition plate (203), and the grouting pipe joint (5) is used for detachably connecting to the grouting pipe (3). The plug assembly (2) also comprises an air intake pipe joint, and the air intake pipe joint is also detachably connected to the exhaust pipe (4).

5. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The prestressed anchor seat (1) comprises a steel bar fixing seat (101), a support rod (102) and a support base (103); a plurality of support rods (102) are arranged in a uniform ring between the steel bar fixing seat (101) and the support base (103); the support rods (102), the steel bar fixing seat (101) and the support base (103) cooperate to form a receiving space for receiving the plug assembly (2).

6. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1, characterized in that: It also comprises a pipe delivery assembly, which comprises a mounting plate (8) and two clamping drive mechanisms arranged on both sides of the mounting plate (8), wherein the clamping drive mechanisms are fixedly connected to the mounting plate (8) via a connecting arm (801).

7. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 6 is characterized in that: The clamping drive mechanism is fixedly connected to the mounting plate (8) via a connecting arm (801). The clamping drive mechanism comprises a reduction drive motor (9), an active clamping roller (10) and a driven clamping roller (11). The fixed distance between the driven clamping roller (11) and the active clamping roller (10) is adjustable. The motor shaft of the reduction drive motor (9) is fixed to the active clamping roller (10). The motor housing of the reduction drive motor (9) is fixed to the connecting arm (801). A connecting shaft (12) is fixed to the connecting arm (801). A sliding sleeve block (13) is slidably provided on the connecting shaft (12). A fixing knob (14) is provided on the sliding sleeve block (13). The fixing knob (14) is threadedly connected to the sliding sleeve block (13). Two sliding sleeve blocks (13) are provided at opposite ends of the driven clamping roller (11). The ends of the driven clamping roller (11) are rotatably connected to the sliding sleeve block (13).

8. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 6, characterized in that: A plurality of positioning columns (7) are fixedly provided on the prestressed anchor seat (1), the mounting plate (8) is provided with through holes having the same number as the positioning columns (7), each positioning column (7) is also provided with a notch, a clamping piece (601) is fixed on the fixing ring (6), after the positioning columns (7) are inserted into the through holes on the mounting plate (8), the fixing ring (6) is fitted with the mounting plate (8), and the fixing ring (6) is rotated to move the clamping piece (601) into the notch on the positioning column (7).

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