Semi-grouting sleeves to prevent steel bar dislocation and wall contact

Abstract

The present invention discloses a semi-grouting sleeve for preventing steel bar dislocation and wall contact, comprising a sleeve body for connecting steel bars at both axial ends, and an elastic stretching member arranged in the sleeve body and capable of axially extending and contracting along the sleeve body, the elastic stretching member being fixedly connected to a sliding component capable of axially sliding along the inner wall of the sleeve body, the sliding component being fixedly connected to the steel bars outside the sleeve body and enabling the steel bars to axially slide into the sleeve body under the pulling action of the elastic stretching member, and a grouting hole and a grouting outlet being arranged on the sleeve body; the semi-grouting sleeve can not only solve the problem of steel bar dislocation and wall contact at both ends of the grouting sleeve, but also provide a certain axial pulling force for the grouting sleeve, thereby improving the connection stability and rigidity.

Description

Technical Field

[0001] The invention relates to a grout-anchored sleeve connector for connecting steel bars between concrete components, and in particular to a semi-grouting sleeve for preventing steel bars from being dislocated and touching a wall. Background Art

[0002] Compared with traditional welding and binding connections, grouting sleeve connection technology has the advantages of reliable performance, wide applicability, and easy installation when connecting steel bars. When pouring concrete components, grouting sleeves are often used as the connection method for internal steel bars. The problem is that when the steel bars at both ends are connected using grouting sleeves, due to problems such as insufficient construction accuracy, the steel bars in the grouting sleeves at the connection of the steel bars on both sides are often misaligned and touch the wall, resulting in a decrease in the bonding and bite effect between the steel bars and the grouting material, which seriously affects the construction quality. Traditional grouting sleeves cannot effectively prevent the steel bars at both ends from being misaligned and touching the wall inside the grouting sleeves. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a semi-grouting sleeve for preventing steel bar dislocation and wall contact, which can not only solve the problem of steel bar dislocation and wall contact at both ends of the grouting sleeve, but also provide a certain axial tension for the grouting sleeve to improve the connection stability and rigidity.

[0004] The semi-grouting sleeve for preventing the steel bar from being dislocated and touching the wall of the present invention comprises a sleeve body for connecting the steel bars at both ends in the axial direction, and an elastic stretching member arranged in the sleeve body and capable of axially extending and contracting along the sleeve body, wherein the elastic stretching member is fixedly connected to a sliding assembly capable of axially sliding along the inner wall of the sleeve body, wherein the sliding assembly is fixedly connected to the steel bars outside the sleeve body and enables the steel bars to axially slide into the sleeve body under the pulling action of the elastic stretching member, and wherein the sleeve body is provided with a grouting hole and a grouting outlet;

[0005] Furthermore, a stop structure for limiting the sliding of the sliding assembly is provided in the sleeve body;

[0006] Furthermore, the sliding assembly includes a cross sliding member that can slide axially along the inner wall of the sleeve body and a steel bar connecting member used for fixed connection with the steel bar, and the cross sliding member and the steel bar connecting member are detachably fixedly connected;

[0007] Furthermore, the cross sliding member is a "cross" shaped structure, and the ends are vertically bent inward to form four flanges, the flanges can slide axially along the inner wall of the sleeve body, and the inner wall of the sleeve is provided with a sliding groove that slidably cooperates with the flanges of the cross sliding member;

[0008] Further, the stop structure is an annular limiting boss radially protruding along the inner wall of the sleeve body, the inner diameter of the annular limiting boss is smaller than the outer diameter of the cross sliding member, and the stop structure is arranged on the inner wall of the sleeve body between the grouting hole and the grout discharge port;

[0009] Furthermore, the steel bar connector is a hollow round tube that can be sleeved on the steel bar, and an "L"-shaped fixed connector for overlapping the cross sliding member is axially arranged on the edge of the hollow round tube;

[0010] Furthermore, there are at least two "L"-shaped fixing connectors, which are symmetrically arranged, and the bending directions of the bending parts of the "L"-shaped fixing connectors are opposite to each other;

[0011] Furthermore, a connecting threaded hole is provided on the hollow round tube, and a limit slot is provided on the cross slide along the radial direction of the sleeve body, and the limit slot cooperates with a block which can be inserted into the slot along the radial direction of the sleeve body port to limit and fix the cross slide to the sleeve body port;

[0012] Further, the elastic stretching member is a spring, and a shear key corresponding to the spring and the steel bar is arranged on the sleeve body, and the shear key is a radial annular protrusion arranged along the inner wall of the sleeve body, and the inner diameter of the radial annular protrusion is larger than the outer diameter of the spring and the steel bar;

[0013] Furthermore, a threaded hole for docking with another steel bar is provided at the sleeve body end corresponding to the elastic tensile member, and the elastic tensile member is fixed to the end of the threaded hole.

[0014] The beneficial effects of the present invention are as follows: a semi-grouting sleeve disclosed by the present invention for preventing steel bar dislocation and wall contact can not only solve the problem of steel bar dislocation and wall contact at both ends of the grouting sleeve, but also provide a certain axial tension for the grouting sleeve, thereby improving the connection stability and rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural cross-sectional view of the present invention;

[0018] Figure 3 is a cross-sectional view of the sleeve body of the present invention;

[0019] Figure 4 and Figure 5 It is a schematic diagram of the structure of the cross sliding member of the present invention;

[0020] Figure 6 It is a schematic diagram of the structure of the steel bar connector of the present invention;

[0021] Figure 7 It is a schematic diagram of the structure of the connection between the steel bar and the sliding component;

[0022] Figure 8 It is a schematic diagram of the structure in which the sliding assembly is temporarily locked at the sleeve port;

[0023] Fig. 9 It is a structural schematic diagram of connecting steel bars at both ends of the sleeve body;

[0024] Fig.10 It is a schematic diagram of the structure after the steel bars at both ends of the sleeve are butt-jointed inside the sleeve. DETAILED DESCRIPTION

[0025] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural cross-sectional view of the present invention; Figure 3 is a cross-sectional view of the sleeve body of the present invention; Figure 4 and Figure 5 It is a schematic diagram of the structure of the cross sliding member of the present invention; Figure 6 It is a schematic diagram of the structure of the steel bar connector of the present invention; Figure 7 It is a schematic diagram of the structure of the connection between the steel bar and the sliding component;

[0026] Figure 8 It is a schematic diagram of the structure in which the sliding assembly is temporarily locked at the sleeve port; Fig. 9 It is a structural schematic diagram of connecting steel bars at both ends of the sleeve body; Fig.10 It is a schematic diagram of the structure after the steel bars at both ends of the sleeve are butt-jointed inside the sleeve. As shown in the figure: the semi-grouting sleeve for preventing the dislocation and contact of steel bars with the wall of the present embodiment comprises a sleeve body 1 for connecting steel bars at both ends in the axial direction, and an elastic tensile member 4 which is arranged in the sleeve body 1 and can be axially extended and retracted along the sleeve body 1, the elastic tensile member 4 is fixedly connected to a sliding assembly which can slide axially along the inner wall of the sleeve body 1, the sliding assembly is fixedly connected to the steel bars outside the sleeve body 1 and makes the steel bars slide axially into the sleeve body 1 under the pulling action of the elastic tensile member 4, the sleeve body 1 is provided with a grouting hole 3 and a grouting outlet 2; both ends of the sleeve body 1 are connected to the steel bars, the elastic tensile member 4 is always in a stretched state in the sleeve body 1, the sliding assembly is used to connect one of the steel bars, when in use, the sliding assembly drives the steel bars to slide into the sleeve body 1 to the docking position through the elastic tensile member 4 which is always in a stretched state, the elastic tensile member 4 is always in a stretched state, and can continuously provide axial tension, and then the grouting material is poured into the grouting hole 3 until the grouting material overflows from the grouting outlet 2 and fills the entire inner tube, until the grouting material reaches the specified strength. It can not only solve the problems of steel bar misalignment and wall contact at both ends of the grouting sleeve, but also provide a certain axial tension for the grouting sleeve to improve the connection stability and rigidity.

[0027] In this embodiment, a stop structure 13 for limiting the sliding of the sliding assembly is provided in the sleeve body 1; the elastic tensile member 4 pulls the sliding assembly to slide toward the other end of the sleeve body 1 until the sliding assembly contacts the stop structure 13 and stops moving. At this time, the elastic tensile member 4 is still in a stretched state and can continuously provide axial tension to fix the steel bar in the sleeve body 1.

[0028] In this embodiment, the sliding assembly includes a cross sliding member 5 that can slide axially along the inner wall of the sleeve body 1 and a steel bar connector 6 used to be fixedly connected to the steel bar. The cross sliding member 5 and the steel bar connector 6 are detachably fixedly connected; the cross sliding member 5 slides along the inner wall of the sleeve body 1, and the steel bar connector 6 is used to connect the steel bars outside the sleeve body 1. During use, the steel bar connector 6 can be fixedly connected to the steel bars first and then fixedly connected to the cross sliding member 5, thereby improving the convenience of operation.

[0029] In this embodiment, the cross slide 5 is a "cross" shaped structure, and the ends are vertically bent inward to form four flanges 17, and the flanges 17 can slide axially along the inner wall of the sleeve body 1, and the inner wall of the sleeve is provided with a slide groove 7 that slides with the flanges 17 of the cross slide 5; the cross slide 5 is formed by vertically cross-fixed slats in the vertical and horizontal directions to form a cross structure, and the 4 ends of the slats are vertically bent to form flanges 17, and chamfers are set between the flanges 17 and the vertical and horizontal slats to play the role of reinforcing ribs, and the flanges 17 can slide along the slide grooves 7 on the inner wall of the sleeve body 1, and the structure of the slide grooves 7 is adapted to the structure and position of the flanges 17. The structure of the cross slide 5 can not only improve the stability of sliding, but also prevent the steel bars from touching the wall during sliding.

[0030] In this embodiment, the stop structure 13 is an annular limiting boss formed by radially protruding along the inner wall of the sleeve body 1. The inner diameter of the annular limiting boss is smaller than the outer diameter of the cross sliding member 5. The stop structure 13 is arranged on the inner wall of the sleeve body 1 between the grouting hole 3 and the grout discharge port 2. The structure of the stop structure 13 is adapted to the structure of the cross sliding member 5. Due to the "cross" structure of the cross sliding member 5, it is only necessary to form a limiting boss circumferentially on the inner wall of the sleeve body 1, and the limiting boss only needs to be located on the "cross" structure to achieve the purpose of limiting the sliding of the cross sliding member 5. "The inner diameter of the annular limiting boss" and "the outer diameter of the cross sliding member 5" refer to the radius or diameter with the cross section center of the sleeve body 1 as the center of the circle.

[0031] In this embodiment, the steel bar connector 6 is a hollow circular tube that can be sleeved on the steel bar, and the edge of the hollow circular tube is axially provided with an "L"-shaped fixed connector 18 for overlapping the cross sliding member 5; the "L"-shaped fixed connectors 18 are at least two and are symmetrically arranged, and the bending directions of the bending parts of the "L"-shaped fixed connectors 18 are opposite to each other; the hollow circular tube can be directly sleeved on the steel bar, and the bending part of the "L"-shaped fixed connector 18 is overlapped on the "cross" structure of the cross sliding member 5. Since the bending directions of the bending parts of the "L"-shaped fixed connectors 18 are opposite to each other, the purpose of snap-on limiting fixation can be achieved.

[0032] In this embodiment, the hollow tube is provided with a connecting threaded hole 16, and the cross slide 5 is provided with a limited slot 14 along the radial direction of the sleeve body 1. The limited slot 14 cooperates with a block 15 that can be inserted into the slot along the radial direction of the sleeve body 1 port to limit and fix the cross slide 5 to the port of the sleeve body 1; in order to improve the connection stability between the hollow tube and the steel bar, the cross slide 5 can be tightly connected to the steel bar by tightening the screw. When in use, the cross slide 5 is located at the port of the sleeve body 1 and the block 15 on the limited slot 14 on the cross slide 5 is inserted radially to make the cross slide 5 stably fixed to the port of the sleeve body 1, and then the hollow tube is connected and fixed to the steel bar and then fixed to the cross slide 5, and finally the block 15 is taken out to release the limited fixation of the cross slide 5, and under the tensile force of the elastic stretching member 4, the cross slide 5 slides along the slide groove 7 on the inner wall of the sleeve body 1 until the stop structure 13 limits its displacement. The limiting slot 14 is a U-shaped slot and is located on any of the longitudinal and transverse strips of the cross sliding member 5, and is symmetrically arranged in the same horizontal direction. The block 15 is also strip-shaped, and one end of the block 15 is inserted into the limiting slot 14, and the other end is located on the end of the sleeve body 1, which serves the purpose of fixing the cross sliding member 5 along the lateral limit of the sleeve body 1.

[0033] In this embodiment, the elastic stretching member 4 is a spring, and the sleeve body 1 is provided with shear keys (8, 9) corresponding to the spring and the steel bar. The shear keys (8, 9) are radial annular protrusions arranged along the inner wall of the sleeve body 1, and the inner diameter of the radial annular protrusion is larger than the outer diameter of the spring and the steel bar; the sleeve body 1 end corresponding to the elastic stretching member 4 is provided with a threaded hole 12 for docking with another steel bar, and the elastic stretching member 4 is fixed to the end of the threaded hole 12. The maximum outer diameter of the spring is smaller than the minimum inner diameter of the annular stop structure 13, and the spring can pass through the annular stop structure 13 to freely expand and contract inside the sleeve body 1, one end of the spring is fixedly connected to the inner wall of the lower end of the threaded hole 12 of the sleeve body 1, and the other end of the spring passes through the annular stop structure 13 and is fixedly connected to the horizontal side of the cross slide 5, and the spring is always in a stretched state, continuously providing axial tension for both ends. The inner wall of the sleeve body 1 is provided with a plurality of annular shear keys 8 between the slurry discharge port 2 and the annular stop structure 13, and a plurality of fan-shaped shear keys 9 are provided between the annular stop structure 13 and the other end of the sleeve body 1. Since there are four slide grooves 7 from the annular stop structure 13 to the other end of the sleeve body 1, and the circumferentially distributed shear keys should avoid the slide grooves 7, the shear keys formed are a fan-shaped structure.

[0034] The method for using the semi-grouting sleeve for preventing the steel bar from being dislocated and touching the wall of the present invention comprises the following steps:

[0035] Step 1: Thread the surface of the upper steel bar 10 and mechanically connect it to the threaded hole;

[0036] Step 2: Put the steel bar connector 6 on the end of the lower steel bar, and bring the lower steel bar 11 with the steel bar connector 6 close to the cross sliding member 5. The steel bar connector 6 can be locked with the cross sliding member 5 by rotating it, and then the bolt is screwed into the threaded hole of the connector to prevent the steel bar connector 6 and the lower steel bar from moving relative to each other.

[0037] Step 3: Pull out the blocks 15 in the slots on both sides of the cross slide 5, and under the action of the spring tension, drive the lower end steel bar to move toward the upper end of the sleeve until the cross slide 5 contacts the annular stop structure 13 and stops moving. At this time, the spring is still in a tensioned state and continues to provide axial tension. Under the action of the axial tension, the lower end steel bar locked with the cross slide 5 is stretched straight and opposite to the axis of the upper end steel bar, so that the steel bar will not be misplaced or touch the wall.

[0038] Step 4: Start pouring grouting material from the grouting port until the grouting material overflows from the discharge port 2 and fills the entire inner tube, and then the grouting is finished.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A semi-grouting sleeve for preventing steel bar dislocation and wall contact, characterized in that: The invention comprises a sleeve body for connecting steel bars at both ends in an axial direction, and an elastic stretching member arranged in the sleeve body and capable of axially extending and contracting along the sleeve body, wherein the elastic stretching member is fixedly connected to a sliding assembly capable of axially sliding along the inner wall of the sleeve body, wherein the sliding assembly is fixedly connected to the steel bars outside the sleeve body and enables the steel bars to axially slide into the sleeve body under the pulling action of the elastic stretching member, wherein a grouting hole and a grouting outlet are arranged on the sleeve body; a stopper structure for limiting the sliding of the sliding assembly is arranged in the sleeve body; the sliding assembly comprises a cross sliding member capable of axially sliding along the inner wall of the sleeve body and a stopper structure for limiting the sliding of the sliding assembly A steel bar connector fixedly connected to the steel bar, the cross sliding member and the steel bar connector are detachably fixedly connected; the cross sliding member is a "cross" shaped structure, and the ends are vertically bent inward to form four flange parts, the flange parts can slide axially along the inner wall of the sleeve body, and the inner wall of the sleeve body is provided with a sliding groove that slides with the flange parts of the cross sliding member; the stopping structure is an annular limiting boss formed by radial protrusions along the inner wall of the sleeve body, the inner diameter of the annular limiting boss is smaller than the outer diameter of the cross sliding member, and the stopping structure is arranged on the inner wall of the sleeve body between the grouting hole and the grouting outlet.

2. The semi-grouting sleeve for preventing steel bar dislocation and wall contact according to claim 1 is characterized in that: The steel bar connector is a hollow round tube that can be sleeved on the steel bar, and an "L"-shaped fixed connector for overlapping the cross sliding member is axially arranged on the edge of the hollow round tube.

3. The semi-grouting sleeve for preventing steel bar dislocation and wall contact according to claim 2 is characterized in that: There are at least two "L"-shaped fixing connectors which are symmetrically arranged, and the bending directions of the bending parts of the "L"-shaped fixing connectors are opposite to each other.

4. The semi-grouting sleeve for preventing steel bar dislocation and wall contact according to claim 3 is characterized in that: The hollow round tube is provided with a connecting threaded hole, and the cross sliding piece is provided with a limit slot along the radial direction of the sleeve body. The limit slot cooperates with a block which can be inserted into the slot along the radial direction of the sleeve body port to limit and fix the cross sliding piece to the sleeve body port.

5. The semi-grouting sleeve for preventing steel bar dislocation and wall contact according to claim 4 is characterized in that: The elastic stretching member is a spring, and a shear key corresponding to the spring and the steel bar is arranged on the sleeve body. The shear key is a radial annular protrusion arranged along the inner wall of the sleeve body, and the inner diameter of the radial annular protrusion is larger than the outer diameter of the spring and the steel bar.

6. The semi-grouting sleeve for preventing steel bar dislocation and wall contact according to claim 5, characterized in that: A threaded hole for butting against another steel bar is arranged at the sleeve body end corresponding to the elastic tensile member, and the elastic tensile member is fixed at the end of the threaded hole.

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