Cast-in-place beam prestressed reinforcement grouting exhaust device

Abstract

The utility model belongs to the field of reinforcing steel bar grouting, and particularly relates to a cast-in-place beam prestressed reinforcing steel bar grouting exhaust device which comprises a reinforcing steel bar, a sleeve and fixing plates, the reinforcing steel bar is sleeved with the sleeve, the two ends of the sleeve are both provided with the fixing plates, the two sides, close to the reinforcing steel bar, of the inner wall of the sleeve are both provided with pouring pipes, and the outer wall of the reinforcing steel bar is sleeved with an extrusion ring; the two ends of a sleeve for sleeving are attached to and fixedly connected with the fixing plates, the outer walls of the two ends of the sleeve are sleeved with fixing springs, and the ends, away from each other, of the fixing springs are fixed to the side walls of the fixing plates. Conveying pipes are obliquely arranged on the two sides, corresponding to the infusion pipe, in the fixing plate for fixing in a penetrating mode, and air guide pipes are arranged on the two sides, away from the conveying pipes, in the fixing plate in a penetrating mode. A center hole is formed in the outer wall of the center of the infusion tube used for conveying. The grouting device has the advantages that the sleeve can be conveniently supported, non-uniform grouting distribution is avoided, exhaust is convenient, and grout leakage is avoided.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of steel bar grouting, in particular to a grouting exhaust device for prestressed steel bars of cast-in-place beams. Background Technique

[0002] In the grouting process of prestressed steel bars of cast-in-place beams, first, tension is applied to the steel bars, then concrete is poured. After the strength reaches the requirement, the steel bars are loosened, and the steel bars retract to offset the tension of normal service loads. In the processing of cast-in-place beams, the setting of steel bars is relatively common. When arranging the steel bars, pipes need to be sleeved outside them, and then grouting is carried out.

[0003] For example, an existing grouting exhaust device for prestressed steel bars of cast-in-place beams with the publication number CN218203901U includes a first prestressed pipe and a second prestressed pipe; the first prestressed pipe and the second prestressed pipe have the same structure, both including a corrugated pipe, a connecting pipe and a prestressed steel bar. There are two connecting pipes. The two connecting pipes are respectively communicated with the two ends of the corrugated pipe. Anchor plates are fixedly connected to the ends of the two connecting pipes. The prestressed steel bar is located inside the corrugated pipe. The two ends of the prestressed steel bar can respectively pass through the connecting pipe and the anchor plate and extend out, and connecting nuts are connected to their extending ends; air pipes are connected to both connecting pipes; the air pipes on the connecting pipes at the lower ends in the first prestressed pipe and the second prestressed pipe are communicated. Grouting is carried out by one prestressed corrugated pipe, and the other prestressed pipe discharges air, and the pipeline air path is smooth.

[0004] The prestressed steel bars of this disclosed patent are vertically placed. However, in the actual processing process, there are also many horizontally placed or obliquely placed prestressed steel bars. Since there are gaps between the steel bars and the pipes, and the pipes lack a support structure, the top or bottom of the pipes is prone to fit with the steel bars under the action of gravity, thus affecting the subsequent grouting operation and resulting in uneven grouting distribution. At the same time, when grouting, this disclosed patent naturally squeezes the gas to move upward by the action of gravity. However, due to the skewed position of the steel bars, the air bubbles are easily surrounded in the slurry and cannot be discharged in time. Without manual exhaust treatment, it relies on the natural flow of the slurry to fill and then discharge the gas, which is prone to generate air bubbles and cause the phenomenon of hollowing. Content of the Utility Model

[0005] The purpose of the utility model is to provide a grouting exhaust device for prestressed steel bars of cast-in-place beams, which solves the problems that the existing steel bars are prone to fit with the inner wall of the external pipes, resulting in uneven grouting distribution and incomplete traditional grouting exhaust, and is prone to hollowing.

[0006] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0007] A grouting and exhaust device for prestressed steel bars of a cast-in-place beam, comprising a steel bar, a sleeve and a fixing plate. The outer part of the steel bar is sleeved with a sleeve, and fixing plates are arranged at both ends of the sleeve. Pouring pipes are arranged on both sides of the inner wall of the sleeve close to the steel bar, and an extrusion ring is sleeved on the outer wall of the steel bar.

[0008] The two ends of the sleeve for sleeving are fixedly connected to the fixing plate in a mutually fitting manner. Fixing springs are sleeved on the outer walls of the two ends of the sleeve, and the mutually remote ends of the fixing springs are fixedly connected to the side walls of the fixing plate.

[0009] Delivery pipes are obliquely penetrated and arranged on both sides of the fixing plate corresponding to the pouring pipes inside the fixing plate for fixing. Air guide pipes are penetrated and arranged on both sides of the fixing plate far from the delivery pipes inside the fixing plate.

[0010] A central hole is formed in the outer wall at the center of the pouring pipe for delivery. A plurality of sealing plugs are arranged on both sides of the outer wall of the pouring pipe close to the central hole.

[0011] Furthermore, both ends of the steel bar penetrate through the inside of the fixing plate, and fastening nuts are connected to both ends of the steel bar by threads, and the fastening nuts are mutually attached to the fixing plate.

[0012] Furthermore, the fixing plate is a cuboid. The delivery pipes and the air guide pipes inside the fixing plate are both in an L shape. The ends of the delivery pipes and the air guide pipes far from the steel bar penetrate through the side walls of the fixing plate and communicate with the outside. The air guide pipes communicate with the inside of the sleeve.

[0013] Furthermore, the end of the delivery pipe close to the steel bar is fixedly connected to the pouring pipe by threads, the inside of the delivery pipe communicates with the inside of the pouring pipe, and the end of the delivery pipe far from the pouring pipe communicates with a delivery pump through a conduit.

[0014] Furthermore, the center of the inside of the extrusion ring is mutually attached and sleeved with the steel bar, the outer wall of the extrusion ring is mutually attached to the inside of the sleeve, and socket holes corresponding to the pouring pipes are formed on both sides of the extrusion ring.

[0015] Furthermore, extrusion rings are sleeved on both ends of the pouring pipe close to the central hole, and through holes are formed at the corresponding positions of the side wall of the pouring pipe and the sealing plugs.

[0016] The embodiment of the present utility model has the following advantages:

[0017] 1. The two pouring pipes are respectively located at the top end and the bottom end inside the sleeve, so that the steel bar is attached to the pouring pipe, realizing the support of the pouring pipe for the sleeve outside the steel bar, avoiding the sleeve from bending downward, thereby keeping the distance between the two sides inside the sleeve and the steel bar consistent. At the same time, since a plurality of extrusion rings are arranged inside the sleeve, the extrusion rings can also be used to support the outside of the steel bar during use, further avoiding the contact between the steel bar and the sleeve and keeping the pouring uniform.

[0018] 2. The extrusion ring moves towards both ends, effectively driving the gas to move. Then the gas is discharged through the gas guide pipe inside the fixed plates at both ends. At the same time, due to the blockage of the extrusion ring, it can effectively block the slurry during transportation and prevent it from flowing randomly. Also, due to the movement of the extrusion ring, the sealing plug on the outer wall of the perfusion pipe can be effectively squeezed and removed, facilitating the perfusion pipe to discharge the slurry from the position where the sealing plug has been removed, improving the perfusion efficiency. When the slurry is perfused to both ends, the extrusion ring is also driven to both ends, causing the extrusion ring to be squeezed and fit with one end of the gas guide pipe, achieving the sealing of the gas guide pipe and preventing the slurry from flowing out. Description of the Drawings

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained based on the provided drawings.

[0020] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0021] Figure 1 Schematic diagram of the present invention;

[0022] Figure 2 Front view of the present invention;

[0023] Figure 3 Internal structure cross-sectional view of the casing of the present invention;

[0024] Figure 4 For Figure 3 Enlarged view of part A in

[0025] Figure 5 Internal structure cross-sectional view of the fixed plate of the present invention.

[0026] In the figure: 1, steel bar; 101, fastening nut; 2, casing; 201, fixing spring; 3, fixed plate; 301, conveying pipe; 302, gas guide pipe; 4, perfusion pipe; 401, central hole; 402, sealing plug; 5, extrusion ring; 501, socket hole. Detailed Embodiments

[0027] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present 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 present utility model.

[0028] Reference Figures 1-5 Shown is a grouting and exhaust device for prestressed steel bars of a cast-in-place beam, including a steel bar 1, a sleeve 2, and a fixing plate 3. The outer part of the steel bar 1 is sleeved with the sleeve 2, and fixing plates 3 are arranged at both ends of the sleeve 2. Pouring pipes 4 are arranged on both sides of the inner wall of the sleeve 2 close to the steel bar 1, and an extrusion ring 5 is sleeved on the outer wall of the steel bar 1; both ends of the sleeve 2 for sleeving are fixedly connected to the fixing plate 3 in a mutually fitting manner. Fixing springs 201 are sleeved on the outer walls at both ends of the sleeve 2, and the mutually remote ends of the fixing springs 201 are fixedly connected to the side walls of the fixing plate 3; on both sides of the interior of the fixing plate 3 for fixing and corresponding to the pouring pipes 4, conveying pipes 301 are obliquely penetrated, and air guide pipes 302 are penetrated on both sides of the interior of the fixing plate 3 away from the conveying pipes 301; at the center of the outer wall of the pouring pipe 4 for conveying, a central hole 401 is opened, and a plurality of sealing plugs 402 are arranged on both sides of the outer wall of the pouring pipe 4 close to the central hole 401.

[0029] As Figure 3 、 Figure 5 Shown, both ends of the steel bar 1 penetrate through the interior of the fixing plate 3, and fastening nuts 101 are connected to both ends of the steel bar 1 by threads. The fastening nuts 101 are mutually attached to the fixing plate 3. The fixing plate 3 is a cuboid. The conveying pipes 301 and the air guide pipes 302 inside the fixing plate 3 are both in an L shape. The ends of the conveying pipes 301 and the air guide pipes 302 away from the steel bar 1 penetrate through the side walls of the fixing plate 3 and communicate with the outside. The air guide pipes 302 communicate with the interior of the sleeve 2. The ends of the conveying pipes 301 close to the steel bar 1 are fixedly connected to the pouring pipes 4 by threads. The interior of the conveying pipes 301 communicates with the interior of the pouring pipes 4. The ends of the conveying pipes 301 away from the pouring pipes 4 are communicated with a conveying pump through a conduit.

[0030] As Figure 2 、 Figure 4 Shown, the center of the interior of the extrusion ring 5 is mutually attached and sleeved with the steel bar 1. The outer wall of the extrusion ring 5 is mutually attached to the interior of the sleeve 2. Socket holes 501 corresponding to the pouring pipes 4 are opened on both sides of the extrusion ring 5. The extrusion ring 5 is sleeved on both ends of the pouring pipe 4 close to the central hole 401. Through holes are opened at the corresponding positions of the side wall of the pouring pipe 4 and the sealing plugs 402.

[0031] Working principle: When in use, the fixing plate 3 can be connected and fixed to the corresponding external structure. Then, when placed horizontally, the two perfusion pipes 4 can be respectively located at the inner top and bottom of the sleeve 2, so that the steel bar 1 is in contact with the perfusion pipe 4, realizing the support of the perfusion pipe 4 for the sleeve 2 outside the steel bar 1, avoiding the sleeve 2 from bending and tilting downward under the action of gravity, thus keeping the distance between the two sides inside the sleeve 2 and the steel bar 1 consistent. At the same time, since a plurality of extrusion rings 5 are arranged inside the sleeve 2, the support for the outside of the steel bar 1 can also be realized through the extrusion rings 5 during use, further avoiding the contact between the steel bar 1 and the sleeve 2 and keeping the perfusion uniform.

[0032] During perfusion, the slurry can be conveniently transported through the delivery pump outside through the delivery pipe 301 inside the fixing plates 3 at both ends of the steel bar 1, and then transported to the perfusion pipes 4 at the top and bottom of the steel bar 1. Then, it is discharged through the central hole 401 at the center of the perfusion pipe 4 to fill the inside of the sleeve 2. At the same time, since extrusion rings 5 are arranged on both sides of the central hole 401, with the extrusion of the slurry, the extrusion rings 5 can be effectively driven to move towards both ends, effectively driving the gas to move. Then, the gas is discharged through the air guide pipes 302 inside the fixing plates 3 at both ends. At the same time, due to the blocking of the extrusion rings 5, the slurry can be effectively blocked during transportation to prevent it from flowing randomly. At the same time, due to the movement of the extrusion rings 5, the sealing plugs 402 on the outer wall of the perfusion pipe 4 can be effectively squeezed and removed, facilitating the perfusion pipe 4 to discharge the slurry from the position where the sealing plugs 402 are removed, improving the perfusion efficiency. At the same time, when the slurry is perfused to both ends, the extrusion rings 5 can also be driven to both ends, so that the extrusion rings 5 are squeezed and fit with one end of the air guide pipe 302, realizing the sealing of the air guide pipe 302 and preventing the slurry from flowing out.

[0033] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A grouting exhaust device for prestressed steel bars of cast-in-place beams, comprising steel bars (1), sleeves (2) and fixing plates (3), characterized in that: The outer part of the steel bar (1) is sleeved with a sleeve (2), both ends of the sleeve (2) are provided with fixing plates (3), the inner wall of the sleeve (2) close to both sides of the steel bar (1) are provided with injection pipes (4), and the outer wall of the steel bar (1) is sleeved with an extrusion ring (5); Both ends of the sleeve (2) used for sleeve connection are fitted and fixedly connected to the fixing plate (3), the outer walls of both ends of the sleeve (2) are sleeved with fixing springs (201), and the ends of the fixing springs (201) that are away from each other are fixed to the side wall of the fixing plate (3); A delivery tube (301) is obliquely provided on both sides of the fixing plate (3) corresponding to the perfusion tube (4) and an air guide tube (302) is provided on both sides of the fixing plate (3) away from the delivery tube (301); A central hole (401) is provided on the outer wall of the perfusion tube (4) used for transportation, and a plurality of sealing plugs (402) are provided on both sides of the outer wall of the perfusion tube (4) close to the central hole (401).

2. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: Both ends of the steel bar (1) penetrate the interior of the fixing plate (3), and both ends of the steel bar (1) are connected to fastening nuts (101) via threads, and the fastening nuts (101) and the fixing plate (3) are in contact with each other.

3. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The fixing plate (3) is a rectangular parallelepiped, and the delivery pipe (301) and the air guide pipe (302) inside the fixing plate (3) are both L-shaped. The ends of the delivery pipe (301) and the air guide pipe (302) away from the steel bar (1) penetrate the side wall of the fixing plate (3) and are connected to the outside, and the air guide pipe (302) is connected to the inside of the sleeve (2).

4. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The end of the delivery pipe (301) close to the steel bar (1) is threadedly connected and fixed to the pouring pipe (4), the interior of the delivery pipe (301) is connected to the interior of the pouring pipe (4), and the end of the delivery pipe (301) away from the pouring pipe (4) is connected to the delivery pump through a conduit.

5. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1 is characterized in that: The inner center of the extrusion ring (5) is fitted and sleeved with the steel bar (1), the outer wall of the extrusion ring (5) is fitted with the inner part of the sleeve (2), and sleeve holes (501) correspondingly sleeved with the injection pipe (4) are provided on both sides of the extrusion ring (5).

6. The grouting exhaust device for prestressed steel bars of cast-in-place beams according to claim 1, characterized in that: Extrusion rings (5) are sleeved on both ends of the perfusion tube (4) near the central hole (401), and through holes are provided at the corresponding positions of the side wall of the perfusion tube (4) and the sealing plug (402).

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