A grout sleeve incorporating an artificial gut wall device

Abstract

The application provides a grouting sleeve with an intestinal wall device, and belongs to the field of prefabricated concrete members. The grouting sleeve solves the problem of insufficient grouting caused by the backflow of grouting material in the existing grouting sleeve, which affects the connection strength. The grouting sleeve comprises a straight cylinder and an intestinal wall inner cylinder. A grout outlet and a grout inlet are respectively arranged on the side surfaces of the upper and lower parts of the straight cylinder. An intestinal wall inner cylinder is arranged at a distance from the upper and lower ends of the straight cylinder. The two intestinal wall inner cylinders are coaxially arranged with the straight cylinder. The intestinal wall inner cylinder comprises a plurality of intestinal wall inner cylinder wall segments and a plurality of intestinal wall inner ribs which are integrally arranged. The intestinal wall inner cylinder wall segments and the intestinal wall inner ribs are arranged in a cross manner. All the intestinal wall inner cylinder wall segments are attached to and fixedly connected to the inner wall of the straight cylinder. All the intestinal wall inner ribs are arranged in an inclined manner towards the grout outlet. The application effectively prevents the backflow of grout.

Description

Technical Field

[0001] This invention belongs to the field of precast concrete component technology, and in particular relates to a grouting sleeve with an internal intestinal wall-like device. Background Technology

[0002] With the rapid development of my country's economy and urbanization, prefabricated building construction has been rapidly promoted and used in China in recent years. Using grouting sleeves to connect reinforcing bars is currently the most common connection method between prefabricated components and has been widely applied.

[0003] The fullness of grouting in the connecting sleeve directly determines the connection strength of the reinforcing bars, thus affecting the structural strength of the entire building. However, currently, due to problems such as grout quality not meeting standard requirements, reinforcing bars failing to enter the sleeve due to installation deviations and being cut or having insufficient anchorage strength, grout not flowing from the sleeve outlet or grout backflow from the sleeve outlet, grouting defects exist inside the grouting sleeve. This affects the fullness and density of the grouting in the reinforcing bar sleeve, reduces the load-bearing capacity and deformation capacity of the precast concrete structural components, and fails to meet the requirements of the specifications and regulations.

[0004] Therefore, by improving the design of the internal structure of the grouting sleeve to address these issues, especially the currently prevalent problem of grout backflow, the grouting will be more complete, the connection strength of the reinforcing bars will be improved, and the overall structural strength of the building will be enhanced to serve the project. Summary of the Invention

[0005] In view of this, the present invention aims to propose a grouting sleeve with an internal intestinal wall-like device to solve the problem of grout backflow at the sleeve outlet causing grouting defects inside the grouting sleeve, thereby affecting the fullness and density of the grouting in the steel reinforcement sleeve.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A grouting sleeve with an internal simulated intestinal wall device includes a straight cylindrical body and an inner cylinder simulating an intestinal wall. A grout outlet and an inlet are respectively provided on the sides of the upper and lower portions of the straight cylindrical body. An inner cylinder simulating an intestinal wall is located at a distance from the upper and lower ends of the straight cylindrical body. Both inner cylinder simulating an intestinal wall are coaxially arranged with the straight cylindrical body. Each inner cylinder simulating an intestinal wall includes multiple integrally formed inner cylinder wall segments and multiple inner ribs. These segments are arranged in a crisscross pattern, and all inner cylinder wall segments are fitted and fixedly connected to the inner wall of the straight cylindrical body. All inner ribs simulating an intestinal wall have gaps between them and the inner wall of the straight cylindrical body, and are all inclined towards the grout outlet.

[0008] Furthermore, an inner tube resembling an intestinal wall is provided at a distance of 30mm from the upper and lower ends of the straight cylinder of the grouting sleeve, and the length of the inner tube resembling an intestinal wall does not exceed 100mm.

[0009] Furthermore, each segment of the simulated intestinal wall inner tube has 3-6 simulated intestinal wall inner ribs.

[0010] Furthermore, the thickness of the simulated intestinal wall inner tube is 1-3 mm.

[0011] Furthermore, the radial height of the simulated intestinal wall inner rib is 2-3 mm.

[0012] Furthermore, the height of the simulated intestinal wall inner rib along the axial direction is 2-3 mm.

[0013] Furthermore, all the simulated intestinal wall ribs have the same inclination angle, and the angle between the simulated intestinal wall ribs and the simulated intestinal wall inner tube segment is 30°≤α<90°.

[0014] Furthermore, both the slurry outlet and the slurry inlet are designed to protrude outwards, and the centers of the slurry outlet and the slurry inlet are on the same vertical line.

[0015] Furthermore, the grouting sleeve's straight cylindrical body is an integral structure with the grout outlet and grout inlet.

[0016] Furthermore, the outer wall of the intestinal wall-like inner cylinder is bonded to or integrally formed with the inner wall of the grouting sleeve linear cylinder.

[0017] Compared with the prior art, the beneficial effects of the grouting sleeve with an internal intestinal wall-mimicking device described in this invention are:

[0018] 1. This application improves the design of the inner wall of the grouting sleeve and, combined with the viscosity characteristics of the grouting material, effectively slows down the backflow rate of the grouting material and increases its density.

[0019] 2. This application can effectively slow down the backflow speed and backflow volume during the grout backflow process by mimicking the protruding shape of the inner rib of the intestinal wall, thereby reducing grouting defects in grouting sleeve grouting and improving the strength of prefabricated structural components; the structure and usage proposed by this invention are relatively simple and easy to implement in engineering applications, improving the applicability of grout backflow prevention improvement.

[0020] 3. The principle of this application is simple, and the internal structure of the grouting sleeve can be reasonably adjusted according to the actual engineering construction situation to achieve improvements that meet more practical engineering needs. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 This is a three-dimensional cross-sectional structural diagram of a grouting sleeve with an internal imitation intestinal wall device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a grouting sleeve with an internal imitation intestinal wall device according to an embodiment of the present invention;

[0024] Figure 3 This is a right view of a grouting sleeve with an internal imitation intestinal wall device according to an embodiment of the present invention;

[0025] Figure 4 This is a front view of a grouting sleeve with an internal simulated intestinal wall device according to an embodiment of the present invention;

[0026] Figure 5 This is a top view of a grouting sleeve with an internal imitation intestinal wall device according to an embodiment of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the intestinal wall-like inner tube as described in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Grouting sleeve straight cylinder; 11. Grout outlet; 12. Grout inlet; 2. Intestinal wall-shaped inner cylinder; 21. Intestinal wall-shaped inner rib; 22. Intestinal wall-shaped inner cylinder wall segment. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0031] like Figures 1-6As shown, a grouting sleeve with an internal simulated intestinal wall device includes a straight cylindrical body 1 and an inner cylinder 2 simulated intestinal wall. A grout outlet 11 and a grout inlet 12 are respectively provided on the upper and lower sides of the straight cylindrical body 1. An inner cylinder 2 simulated intestinal wall is provided at a distance from the upper and lower ends of the straight cylindrical body 1. Both inner cylinders 2 simulated intestinal wall are coaxially arranged with the straight cylindrical body 1. The inner cylinder 2 simulated intestinal wall includes multiple integrally formed inner cylinder wall segments 22 and multiple inner ribs 21 simulated intestinal wall. The inner cylinder wall segments 22 and the inner ribs 21 are arranged crosswise. All inner cylinder wall segments 22 are fitted and fixedly connected to the inner wall of the straight cylindrical body 1. All inner ribs 21 simulated intestinal wall have gaps with the inner wall of the straight cylindrical body 1 and are inclined towards the grout outlet 11.

[0032] Since the inner ribs of the sleeve should be distributed within the length of the inelastic section of the reinforcing bar, a section of imitation intestinal wall inner cylinder 2 is respectively provided 30mm from the upper and lower ends of the straight cylinder 1 of the grouting sleeve, and the length of the imitation intestinal wall inner cylinder 2 does not exceed 100mm. At this stage, due to the large stress, strain and slippage of the reinforcing bar, a large extrusion force is generated on the grouting material at the rib of the reinforcing bar, and the splitting crack of the grouting material is fully developed. The contact pressure at the inner rib of the sleeve has a very obvious constraint on the grouting material. Therefore, setting ring ribs in this section is beneficial to improving the bonding performance of the reinforcing bar.

[0033] Increasing the height and number of ribs inside the sleeve can reduce the adhesion between the sleeve and the grout to a certain extent and enhance the active constraint on the grout. However, excessively high ribs and too many ribs can create weak points in the grout, reducing its strength. Therefore, it is necessary to limit the rib height and number. It can be set as follows: the number of intestinal wall ribs 21 in each segment of the simulated intestinal wall inner cylinder 2 is 3-6. The thickness of the simulated intestinal wall inner cylinder 2 is controlled at 1-3 mm based on the strength of the composite material. The radial height of the simulated intestinal wall ribs 21 is 2-3 mm. The axial height of the simulated intestinal wall ribs 21 is 2-3 mm. All simulated intestinal wall ribs 21 have the same inclination angle, and the angle between the simulated intestinal wall ribs 21 and the simulated intestinal wall inner cylinder segment 22 is 30°≤α<90°.

[0034] Both the outlet 11 and the inlet 12 protrude outwards, and their centers are aligned vertically. The grouting sleeve's straight cylindrical body 1 is an integral structure with the outlet 11 and inlet 12. The outer wall of the intestinal wall-like inner cylinder 2 is bonded to or integrally formed with the inner wall of the grouting sleeve's straight cylindrical body 1. This design meets practical engineering needs and facilitates grouting.

[0035] The intestinal wall-like inner cylinder 2 is fixed inside the straight cylinder 1 of the grouting sleeve before the test begins. It can slow down the backflow of grout material during the grouting process by using a larger contact area and the reverse flow inner rib.

[0036] A test method for a grouting sleeve with an inner intestinal wall imitation is described below:

[0037] Step 1: Connect the device. Before the test, connect the grouting sleeve straight cylinder 1 and the imitation intestinal wall inner cylinder 2, and fix the steel bars in the grouting sleeve respectively.

[0038] Step 2, grouting test: Grout is injected into the grouting sleeve through the grout inlet 12. When the grout passes through the inner cylinder 2 of the simulated intestinal wall, the flow rate of the grout will not be affected because the inner rib 21 of the simulated intestinal wall is oriented towards the grout outlet. When grouting is stopped and the grout flows back under the action of gravity, the inner rib of the simulated intestinal wall protruding towards the grout outlet 11 will reduce the backflow rate and the backflow volume.

[0039] Step 3: End of test, disassemble the device.

[0040] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A grouting sleeve with an internal intestinal wall-mimicking device, characterized in that: It includes a grouting sleeve linear cylinder (1) and an intestinal wall-like inner cylinder (2). A grout outlet (11) and a grout inlet (12) are respectively provided on the upper and lower sides of the grouting sleeve linear cylinder (1). An intestinal wall-like inner cylinder (2) is provided at a distance from the upper and lower ends of the grouting sleeve linear cylinder (1). Both intestinal wall-like inner cylinders (2) are coaxially arranged with the grouting sleeve linear cylinder (1). The intestinal wall-like inner cylinder (2) includes an integrally formed... Multiple segments of the imitation intestinal wall inner cylinder (21) and multiple segments of the imitation intestinal wall inner rib (22) are arranged in a cross manner, and all the imitation intestinal wall inner cylinder segments (21) are attached to and fixedly connected to the inner wall of the grouting sleeve straight cylinder (1). All the imitation intestinal wall inner ribs (22) are provided with gaps between them and the inner wall of the grouting sleeve straight cylinder (1), and are all arranged inclined towards the grout outlet (11). All the simulated intestinal wall inner ribs (22) have the same tilt angle, and the angle between the simulated intestinal wall inner ribs (22) and the simulated intestinal wall inner tube segment (21) is 30°≤α<90°.

2. The grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: A section of simulated intestinal wall inner cylinder (2) is provided at each end 30 mm away from the upper and lower ends of the straight cylinder (1) of the grouting sleeve, and the length of the simulated intestinal wall inner cylinder (2) does not exceed 100 mm.

3. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The number of simulated intestinal wall ribs (22) in each segment of the simulated intestinal wall inner tube (2) is 3-6.

4. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The thickness of the simulated intestinal wall inner tube (2) is 1-3 mm.

5. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The radial height of the simulated intestinal wall inner rib (22) is 2-3 mm.

6. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The height of the simulated intestinal wall inner rib (22) along the axial direction is 2-3 mm.

7. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The outlet (11) and inlet (12) of the slurry are both protruding outwards, and the centers of the outlet (11) and inlet (12) are on the same vertical line.

8. A grouting sleeve with an internal intestinal wall-mimicking device according to claim 1, characterized in that: The grouting sleeve linear cylinder (1) is an integral structure with the grout outlet (11) and the grout inlet (12).

9. A grouting sleeve with an internal intestinal wall-mimicking device according to any one of claims 1-8, characterized in that: The outer wall of the intestinal wall-like inner cylinder (2) is bonded to or integrally formed with the inner wall of the grouting sleeve linear cylinder (1).

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