Grouting sleeve and sleeve steel bar assembly including the grouting sleeve

Abstract

The present invention discloses a grouting sleeve and a sleeve steel bar assembly including the grouting sleeve, which belongs to the technical field of construction engineering, and is designed to solve the problem that dead corners without grouting material are prone to occur in the existing grouting sleeves. The grouting sleeve of the present invention includes a tubular sleeve body, and a grouting inlet and a grouting outlet are opened on the side wall of the sleeve body. The inner wall of the sleeve body protrudes toward the axis direction of the sleeve body to form a pressure groove, and the pressure groove is elliptical in the cross section perpendicular to the axis of the sleeve body. The grouting sleeve and the sleeve steel bar assembly of the present invention increase the friction between the grouting material and the outer wall of the steel bar while leaving a large enough space for the circulation of the grouting material. The grouting material can quickly fill the interior of the sleeve body, making the steel bar connection more firmly, solving the problem that the grouting material is easily incompletely poured inside the existing grouting sleeve, and is suitable for the processing of various concrete prefabricated parts.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a grouting sleeve and a sleeve steel bar assembly comprising the grouting sleeve. Background Art

[0002] When processing precast concrete shear walls, precast concrete frame columns or precast concrete frame beams, it is necessary to wrap concrete around the outside of the steel bars. When the length of the steel bars is not enough, the steel bars need to be connected. Figure 1 As shown, two steel bars 5 are respectively inserted into the grouting sleeve 6 from one end, and the two ends are covered with sealing pads 7, and then the grouting material is poured from the grout inlet to make the steel bars 5 and the grouting sleeve 6 tightly connected.

[0003] In order to improve the strength of the steel bar connection, an annular protrusion is formed inward on the inner wall of the grouting sleeve 6 to strengthen the friction between the inner wall of the grouting sleeve 6 and the grouting material, so as to improve the force transmission efficiency of the grouting material and improve the node bearing capacity. The defects of this structure are: the inner diameter of the annular protrusion cannot be too large, otherwise the friction between the inner wall of the grouting sleeve 6 and the outer wall of the steel bar cannot be increased; but the inner diameter of the annular protrusion cannot be too small, otherwise the flow of the grouting material is blocked, and once the grouting lasts for a little longer, the grouting material will solidify, resulting in uneven distribution of the grouting material in the grouting sleeve 6, and dead corners without grouting material, which in turn leads to reduced strength of the steel bar connection. Summary of the invention

[0004] One object of the present invention is to provide a grouting sleeve which increases the friction between the grouting material and the outer wall of the steel bar while leaving a sufficiently large space for the circulation of the grouting material.

[0005] Another object of the present invention is to provide a sleeve steel bar assembly with stronger steel bar connection.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] A grouting sleeve is used for connecting steel bars, comprising a tubular sleeve body, a grouting inlet and a grouting outlet are provided on the side wall of the sleeve body, the inner wall of the sleeve body protrudes toward the axis of the sleeve body to form a pressure groove, and the pressure groove is elliptical in a cross section perpendicular to the axis of the sleeve body.

[0008] Particularly, the pressure groove is formed by extrusion of the sleeve body, a groove is formed on the outer wall of the sleeve body, and the groove is aligned with the pressure groove.

[0009] In particular, the inner wall of the sleeve body is divided into a flat area and two pressure groove areas, the flat area is located between the two pressure groove areas, and each of the pressure groove areas is provided with at least one pressure groove.

[0010] Furthermore, the slurry inlet is located within the range of one of the two pressure tank areas, and the slurry outlet is located within the range of the other one.

[0011] Furthermore, the slurry inlet and the slurry outlet are both located between two adjacent pressure grooves.

[0012] Particularly, a plurality of the pressure grooves are evenly arranged in each of the pressure groove areas.

[0013] In particular, the pressure groove is in the shape of a cosine function in a cross section extending along the axis of the sleeve body.

[0014] On the other hand, the present invention adopts the following technical solutions:

[0015] A sleeve steel bar assembly includes at least two steel bars and the above-mentioned grouting sleeve, at least one of the steel bars is inserted into the grouting sleeve from one end opening of the grouting sleeve, and at least one of the steel bars is inserted into the grouting sleeve from the other end opening of the grouting sleeve, and a gap is left between the adjacent ends of the two steel bars.

[0016] In particular, the inner wall of the sleeve body of the grouting sleeve is divided into a flat area and two pressure groove areas, the flat area is located between the two pressure groove areas, each of the pressure groove areas is provided with at least one pressure groove, and the ends of all the steel bars inserted into the grouting sleeve are located within the flat area.

[0017] The inner wall of the grouting sleeve of the present invention protrudes toward the axis direction of the sleeve body to form a pressure groove. The pressure groove is elliptical in the cross section perpendicular to the axis of the sleeve body, which increases the friction between the grouting material and the outer wall of the steel bar while leaving a sufficiently large space for the circulation of the grouting material. The grouting material can quickly fill the interior of the sleeve body, making the steel bar connection more secure, thereby solving the problem of incomplete grouting of the existing grouting sleeve.

[0018] The sleeve steel bar assembly of the present invention includes the above-mentioned grouting sleeve, which increases the flow rate of the grouting material while increasing the bonding strength, making the steel bar connection more secure; no manual adjustment is required during the grouting process, which saves labor costs, saves time for manual adjustment, improves production efficiency, and is suitable for the processing of various concrete prefabricated parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a semi-section structural schematic diagram of an existing sleeve steel bar assembly;

[0020] Figure 2 is a schematic diagram of a half-section structure of a grouting sleeve provided in a specific embodiment of the present invention;

[0021] Figure 3 yes Figure 2 Middle AA section view;

[0022] Figure 4 yes Figure 2 Middle BB section view.

[0023] In the figure:

[0024] 1. Sleeve body; 5. Steel bar; 6. Grouting sleeve; 7. Sealing gasket; 11. Slurry inlet; 12. Slurry outlet; 13. Pressure groove; 14. Groove; 15. Flat area. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] This embodiment discloses a grouting sleeve connected between steel bars and a sleeve steel bar assembly including the grouting sleeve. The sleeve steel bar assembly includes two steel bars, one of which is inserted into the grouting sleeve from an opening at one end of the grouting sleeve, and the other is inserted into the grouting sleeve from an opening at the other end of the grouting sleeve, a gap is left between the adjacent ends of the two steel bars, and sealing pads are respectively installed at the ends of the grouting sleeve.

[0027] like Figures 2 to 4 As shown, the grouting sleeve comprises a tubular sleeve body 1 with openings at both ends, and a grout inlet 11 for grouting and a grout outlet 12 for grouting are provided on the side wall of the sleeve body 1. The inner wall of the sleeve body 1 protrudes toward the axis direction of the sleeve body 1 to form a pressure groove 13, and the pressure groove 13 is elliptical in the cross section perpendicular to the axis of the sleeve body 1.

[0028] A portion of the pressure groove 13 is closer to the outer wall of the steel bar, which increases the friction between the inner wall of the sleeve body 1 and the outer wall of the steel bar, thereby improving the strength of the sleeve steel bar assembly; another portion of the pressure groove 13 is farther from the outer wall of the steel bar, leaving enough space for the flow of the grouting material, so that the grouting material can quickly enter from the slurry inlet 11, fill the interior of the sleeve body 1, and then be discharged from the slurry outlet 12, thereby avoiding the generation of a space without grouting material in the sleeve body 1.

[0029] The specific formation method of the pressure groove 13 is not limited. The outer wall shape of the sleeve body 1 can be the same as the outer wall shape of the existing sleeve, and the pressure groove 13 is formed on the inner wall of the sleeve body 1 alone; or the sleeve body 1 is extruded to form the pressure groove 13, and a groove 14 aligned with the pressure groove 13 is formed on the outer wall of the sleeve body 1.

[0030] When processing structures such as precast concrete shear walls, precast concrete frame columns or precast concrete frame beams, the groove 14 can enhance the friction between the concrete and the sleeve body 1, thereby making the structures such as precast concrete shear walls, precast concrete frame columns or precast concrete frame beams more solid and reliable, extending the service life of the building and improving the earthquake resistance of the building.

[0031] Along the direction from the slurry inlet 11 to the slurry outlet 12, the inner wall of the sleeve body 1 is sequentially divided into a pressure groove area, a flat area 15 and a pressure groove area. Multiple pressure grooves 13 are evenly arranged in each pressure groove area, and the ends of all the steel bars inserted into the grouting sleeve are located within the flat area 15. The inner diameter of the flat area 15 is equal to the long axis of the pressure groove 13, that is, the flat area 15 provides the largest space for the circulation of the grouting material, which improves the flow rate of the grouting material. Because a small section of the end of the steel bar is located within the flat area 15, it is more important to increase the flow rate of the grouting material than to increase the friction between the grouting material and the steel bar, so the pressure groove 13 is cancelled in the middle of the sleeve body 1 and restored to a cylindrical structure.

[0032] In order to further avoid the dead corner without grouting material in the sleeve body 1, the grout inlet 11 is located within the range of one of the two pressure groove areas, and the grout outlet 12 is located within the range of the other, and preferably, the grout inlet 11 and the grout outlet 12 are both located near the end of the sleeve body 1 to avoid the dead corner without grouting material at the end of the sleeve body 1. The grout inlet 11 and the grout outlet 12 are both located between two adjacent pressure grooves 13 on the side wall of the sleeve body 1, which is convenient for processing, and the grouting and grouting are smoother, avoiding the obstruction of the flow of grouting material due to the outer wall of the steel bar being too close to the grout inlet 11 or the grout outlet 12.

[0033] The pressure groove 13 is formed on the sleeve body 1 by extrusion, so the pressure groove 13 cannot be a sheet structure. Preferably, the pressure groove 13 is in the shape of a cosine function on the cross section extending along the axis of the sleeve body 1, which is convenient for processing, has less resistance when the grouting material flows over the pressure groove 13, and has higher mechanical strength at the pressure groove 13.

[0034] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A grouting sleeve for connecting steel bars, comprising a tubular sleeve body (1), a grouting inlet (11) and a grouting outlet (12) being provided on the side wall of the sleeve body (1), characterized in that: The inner wall of the sleeve body (1) protrudes toward the axis of the sleeve body (1) to form a pressure groove (13), and the pressure groove (13) is elliptical in a cross section perpendicular to the axis of the sleeve body (1); The inner wall of the sleeve body (1) is divided into a flat area (15) and two pressure groove areas, wherein the flat area (15) is located between the two pressure groove areas, and each of the pressure groove areas is provided with at least one pressure groove (13); the inner diameter of the flat area (15) is equal to the long axis of the pressure groove (13); The slurry inlet (11) is located within the range of one of the two pressure tank areas, and the slurry outlet (12) is located within the range of the other one; The slurry inlet (11) and the slurry outlet (12) are both located between two adjacent pressure grooves (13); The pressure groove (13) is in the shape of a cosine function on a cross section extending along the axis of the sleeve body (1).

2. The grouting sleeve according to claim 1, characterized in that: The sleeve body (1) is extruded to form the pressure groove (13), and a groove (14) is formed on the outer wall of the sleeve body (1), and the groove (14) is aligned with the pressure groove (13).

3. The grouting sleeve according to claim 1, characterized in that: A plurality of pressure grooves (13) are evenly arranged in each pressure groove area.

4. A sleeve steel bar assembly, comprising at least two steel bars, characterized in that: It also includes a grouting sleeve as described in any one of claims 1 to 3, at least one of the steel bars is inserted into the grouting sleeve from one end opening of the grouting sleeve, at least one of the steel bars is inserted into the grouting sleeve from the other end opening of the grouting sleeve, and a gap is left between the adjacent ends of the two steel bars.

5. The sleeve reinforcement assembly according to claim 4, characterized in that: The inner wall of the sleeve body (1) of the grouting sleeve is divided into a flat area (15) and two pressure groove areas, the flat area (15) is located between the two pressure groove areas, each of the pressure groove areas is provided with at least one pressure groove (13), and the ends of all the steel bars inserted into the grouting sleeve are located within the range of the flat area (15).

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