Assembly type concrete structure connection grouting sleeve

Abstract

The utility model provides an assembly type concrete structure connection grouting sleeve which effectively solves the problems that when an existing full grouting sleeve connecting piece is used, the extending length of a steel bar is not easy to control, bubbles are easy to form, the connection strength is unstable, and the use is inconvenient. According to the technical scheme, the sleeve comprises a sleeve body, and the left lower end and the right upper end of the sleeve body are provided with openings; clamping units are arranged in cavities in the two ends of the main body, each clamping unit is composed of a plurality of arc-shaped plates coaxial with the main body, one end of each arc-shaped plate is hinged to the side wall of the main body, and the other end of each arc-shaped plate extends towards the center of the main body; a gap is formed between the outer side wall of the clamping unit and the main body, and a sealing rubber ring is placed in the gap; the steel bar self-locking sleeve is ingenious in structure, the stretching length of the steel bar can be controlled, meanwhile, the sleeve clamps the steel bar and achieves self-locking by means of the expansion characteristic of concrete, the connection strength is guaranteed, tedious plugging links are not needed in the construction process, grouting can be directly conducted, and operation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of steel bar connection technology in prefabricated buildings, and in particular to a grouting sleeve for connecting prefabricated concrete structures. Background Technology

[0002] In prefabricated concrete structures, grouting sleeves are commonly used for connections. Most fully grouted sleeves are one-piece structures, requiring both ends to be sealed before use. Grout is injected through the inlet and discharged through the outlet at the other end, completing the grouting process. However, controlling the depth of the reinforcing bar insertion into the grouting sleeve is difficult, and these errors indirectly lead to unstable connection strength. To address this, patent document CN215484106U proposes a fully grouted sleeve. While this solves the problem of controlling the reinforcing bar insertion length by using a single-sided nut 20 within the sleeve body 10, it also divides the sleeve body 20 into two unconnected chambers. During construction, grouting must be performed at both ends separately, easily creating air bubbles or voids at the ends of the reinforcing bars, significantly reducing connection strength and making it difficult to meet strength requirements. Furthermore, since traditional sleeves are generally cylindrical steel tubes open at both ends, at least one end of the tube must be sealed before grouting, allowing grout to enter through the inlet and overflow from the other side, making the operation cumbersome and inefficient.

[0003] To address the aforementioned issues, a prefabricated concrete structure connection grouting sleeve is provided. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a prefabricated concrete structure connection grouting sleeve, which effectively solves the problems of existing full grouting sleeve connectors, such as difficulty in controlling the length of the reinforcing bar insertion, easy formation of air bubbles, unstable connection strength, and inconvenience in use.

[0005] The technical solution is as follows: a main body including a sleeve, with openings at the lower left and upper right ends; clamping units are located in the cavities at both ends of the main body, each clamping unit consisting of multiple arc-shaped plates coaxial with the main body, one end of each arc-shaped plate being hinged to the side wall of the main body, and the other end of each arc-shaped plate extending toward the center of the main body; there is a gap between the outer wall of the clamping unit and the main body, and a sealing rubber ring is placed in the gap.

[0006] Preferably, the clamping unit is in the shape of a trumpet with the opening facing outwards.

[0007] Preferably, the main body cavity contains two control modules corresponding to the clamping units. Each control module includes a cylinder, a small plate, and multiple connecting rods. The cylinder is coaxial with the main body, its end is in close contact with a sealing rubber ring, and its outer surface is in close contact with the inner wall of the main body, and the outer surface of the cylinder can seal the corresponding opening. The small plate is located on the side of the cylinder away from the rubber ring, and the small plate and the cylinder are fixed together by multiple connecting rods to form a conical cage structure. There is a compression spring between the two control modules, and the compression spring is located between the two small plates.

[0008] Preferably, the small plate has a conical recess.

[0009] This utility model has a clever structure that can control the length of the reinforcing bar. At the same time, it utilizes the expansion characteristics of concrete to clamp the reinforcing bar with the sleeve and achieve self-locking, ensuring connection strength. During construction, there is no need for cumbersome sealing procedures; grouting can be done directly, making the operation convenient and quick. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0011] Figure 2 This is the front view of the present utility model.

[0012] Figure 3 This is a side view of the present invention.

[0013] Figure 4 This is a diagram showing the usage state of this utility model.

[0014] Figure 5 This is an exploded view of the present invention. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Depend on Figures 1 to 5 As shown, the present invention includes a main body 1 of a sleeve, with openings 2 at the lower left and upper right ends of the main body 1; each of the two cavities of the main body 1 has a clamping unit 3, which is composed of multiple arc-shaped plates coaxial with the main body 1, one end of the arc-shaped plate is hinged to the side wall of the main body 1, and the other end of the arc-shaped plate extends toward the center of the main body 1; there is a gap between the outer side wall of the clamping unit 3 and the main body 1, and a sealing rubber ring 4 is placed in the gap.

[0017] In order to enable the clamping unit 3 to clamp the steel bar, the clamping unit 3 is shaped like a trumpet with the opening 2 facing outward.

[0018] To control the length of the reinforcing bar insertion, the main body 1 contains two control modules corresponding to the clamping units 3. Each control module includes a cylinder 5, a small plate 6, and multiple connecting rods 7. The cylinder 5 is coaxial with the main body 1, and its end is in close contact with the sealing rubber ring 4. The outer surface of the cylinder 5 is in close contact with the inner wall of the main body 1, and the outer surface of the cylinder 5 can seal the corresponding opening 2. The small plate 6 is located on the side of the cylinder 5 away from the rubber ring, and the small plate 6 and the cylinder 5 are fixed together by multiple connecting rods 7 to form a conical cage structure. There is a compression spring 8 between the two control modules, and the compression spring 8 is located between the two small plates 6.

[0019] To prevent unevenness at the ends of the reinforcing bars, a conical recess is provided on the small plate 6.

[0020] It is worth noting that in this scheme, the clamping unit is a cylindrical structure composed of multiple arc plates, and the diameter of the steel bar to be clamped must be larger than the minimum diameter of the clamping unit; the rubber sealing ring has two functions, one is to seal, and the other is to use its own elasticity to deal with some potential problems caused by the expansion of concrete during drying.

[0021] In use, the ends of the reinforcing bars on both sides are inserted into the sleeve from both sides. After the reinforcing bar ends enter, they press against the two small plates 6 and move towards the middle. The small plates 6 drive the cylinder 5 to move via the connecting rod 7. When the cylinder 5 completely disengages from its corresponding opening 2, both openings 2 on both sides open. This state is maintained, and grout is injected through the lower left opening 2 until grout overflows from the right end. After standing until dry, the reinforcing bar connection is completed. During the concrete drying process, the expansion of the concrete forces multiple arc-shaped plates in the clamping unit 3 to squeeze the reinforcing bars inward, thus achieving self-locking. After the concrete dries, the clamping unit 3 clamps the concrete firmly and reliably, and the reinforcing bars on both sides are also coaxially connected.

[0022] This utility model has a clever structure that can control the length of the reinforcing bar. At the same time, it utilizes the expansion characteristics of concrete to clamp the reinforcing bar with the sleeve and achieve self-locking, ensuring connection strength. During construction, there is no need for cumbersome sealing procedures; grouting can be done directly, making the operation convenient and quick.

Claims

1. A fabricated concrete structure connecting grout sleeve, characterized in that, The main body (1) includes a sleeve, and the lower left end and upper right end of the main body (1) have openings (2); both ends of the main body (1) have clamping units (3), and the clamping units (3) are composed of multiple arc-shaped plates coaxial with the main body (1). One end of the arc-shaped plate is hinged to the side wall of the main body (1), and the other end of the arc-shaped plate extends toward the center of the main body (1); there is a gap between the outer side wall of the clamping unit (3) and the main body (1), and a sealing rubber ring (4) is placed in the gap.

2. A fabricated concrete structure connecting grout sleeve according to claim 1, characterised in that, The clamping unit (3) is shaped like a trumpet with the opening (2) facing outward.

3. A fabricated concrete structure connecting grout sleeve according to claim 1 or 2, characterised in that, The main body (1) has two control modules that correspond one-to-one with the clamping unit (3). The control module includes a cylinder (5), a small plate (6), and multiple connecting rods (7). The cylinder (5) is coaxial with the main body (1), the end of the cylinder (5) is in close contact with the sealing rubber ring (4), the outer surface of the cylinder (5) is in close contact with the inner wall of the main body (1), and the outer surface of the cylinder (5) can block the corresponding opening (2). The small plate (6) is located on the side of the cylinder (5) away from the rubber ring. The small plate (6) and the cylinder (5) are fixed together by multiple connecting rods (7) to form a conical cage structure. There is a compression spring (8) between the two control modules. The compression spring (8) is located between the two small plates (6).

4. A fabricated concrete structure connecting grout sleeve according to claim 3, characterised in that, The small plate (6) has a conical recess.

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