Split type full grouting sleeve
Through the threaded connection structure of the split fully grouting sleeve, the problem of steel bar connection for precast concrete components in a small space is solved, efficient and reliable steel bar connection is achieved, and construction efficiency and structural performance are improved.
Patent Information
- Application Number
- CN202421366059.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In the construction of prefabricated concrete structures, the existing technology is difficult to effectively solve the connection problems between prefabricated concrete members in small spaces, resulting in increased material costs, low production efficiency, difficult to ensure construction quality and degraded structural performance.
A split-type fully grouting sleeve is adopted, which consists of two sections of cylinders connected by threads. The outer diameters of the cylinders are equal, which can achieve docking and connection of steel bars in a small space, reducing the installation operation space requirement.
It realizes efficient connection of steel bars in a small space, improves construction speed and node quality, reduces material usage and difficulty in pouring concrete, and is suitable for connecting precast concrete components in a small space.
Smart Images
Figure CN222649222U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of assembled concrete structures, in particular to a split full-grouting sleeve. Background Art
[0002] During the construction of prefabricated concrete structures, the connection between the steel bars of prefabricated concrete components in small spaces is often involved. For example, in the beam-column connection node of the prefabricated frame structure, the longitudinal bars of the beam ends need to be prefabricated in the same direction to complete the connection between the steel bars in the beam-column node in a small space. The traditional domestic practice is to bend and anchor the prefabricated beam end longitudinal bars at 90 degrees in the cast-in-place beam-column node. This method has a relatively small increase in material cost, but the left and right offset avoidance of the beam bars needs to be considered during the design, which increases the types of prefabricated beam components and makes it difficult to achieve standardized design; the bending and processing of the steel bars during production is cumbersome, the production efficiency is low, and the accuracy of the bars cannot be well guaranteed; collisions between the steel bars are prone to occur during on-site construction, affecting the installation speed of the prefabricated beams. In addition, the bend-anchor connection will cause dense arrangement of steel bars, making it difficult to ensure the casting quality, affecting the bond strength between the steel bars and concrete, and possibly reducing the structural performance of the node.
[0003] Due to the above-mentioned problems in the bending and anchoring connection of beam reinforcement, it is undoubtedly a better way to achieve butt connection between beam reinforcements and simplify the reinforcement structure in the beam-column node. For example, in Japan, where the prefabricated technology is relatively mature, an integrated cast full-grouting sleeve is usually used for butt connection of beam reinforcement in cast-in-place nodes. Before hoisting, the sleeve needs to be inserted into the longitudinal reinforcement of one side of the beam end in advance. After the two beams in the same direction are hoisted in place, the sleeve is moved to the preset position so that the beam reinforcement at both ends penetrates into the sleeve to reach the designed anchoring length. Finally, high-strength grouting material is poured into the sleeve, and the butt connection of the steel bars is achieved after it hardens. However, the operating space required for the installation of the full-grouting sleeve is large (the cross-section of the beam-column node is at least 1.5 times the length of the sleeve), which is suitable for large-space beam-column nodes in Japan, but not for small-space beam-column nodes in China. Due to the many difficulties in the above-mentioned beam reinforcement connection method in the beam-column node, the development of prefabricated frame structure in China has been restricted to a certain extent. Utility Model Content
[0004] In view of the above-mentioned technical problems, the purpose of the utility model is to provide a split full-grouting sleeve, which has a reasonable structure, reliable connection, and small operating space required for connection, thereby greatly reducing the required length of the cast-in-place section between prefabricated components. It is particularly suitable for butt connection between steel bars in a small space, thereby improving the construction speed and ensuring the construction quality of the connection nodes.
[0005] In order to achieve the above object, the technical solution of the utility model is:
[0006] A split full-grouting sleeve, which consists of a first cylinder and a second cylinder coaxially connected, the first cylinder and the second cylinder have the same outer diameters, and are both provided with grouting holes and grouting holes, the grouting holes and the grouting holes are both located on the same side of the first cylinder or the second cylinder, connecting the inner cavity of the first cylinder and the second cylinder with the outer surface, and forming a full-grouting sleeve through a threaded connection structure of the first cylinder and the second cylinder, and the threaded connection portion divides the full-grouting sleeve into two left and right sections of cylinders with independent inner cavities, and the two sections of the cylinders are fixedly connected to the connected steel bars by injecting grouting material.
[0007] The split full grouting sleeve has two sections of a cylinder connected by a threaded structure to form a detachable split full grouting sleeve with equal outer diameters.
[0008] The threaded connection structure of the split full grouting sleeve comprises an inner joint protruding from the end of the first cylinder body and an outer joint recessed from the end of the second cylinder body, and the outer wall of the inner joint and the inner wall of the outer joint are evenly provided with mutually matching threads.
[0009] The split full grouting sleeve has a solid structure in the inner joint of the threaded connection structure, and the assembled full grouting sleeve is divided into two left and right cylinders with independent inner cavities, and the two cylinders are fixedly connected to the connected steel bars by injecting grouting material.
[0010] The split full grouting sleeve, the first cylinder body and the second cylinder body are formed by casting, or are processed from seamless steel pipes by mechanical processing technology.
[0011] The split full grouting sleeve is used for butt connection between steel bars of precast concrete components in a small space.
[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0013] 1. The utility model provides a split full grouting sleeve, that is, a full grouting sleeve is divided into two sections of the cylinder for processing, and then the full grouting sleeve is formed by threaded connection. Before the prefabricated component is hoisted into place, the two sections of the cylinder are respectively sleeved on two steel bars to be connected in the same direction of the prefabricated component. After hoisting into place, the two sections of the cylinder are relatively rotated for threaded connection, thereby greatly shortening the required installation operation space, and only the node section length needs to be greater than the total length of the cylinder, which is particularly suitable for the butt connection of horizontal steel bars in a small space.
[0014] 2. The threaded connection structure of the utility model is a method of threaded connection between the protruding inner joint at the end of the first cylinder and the recessed outer joint at the end of the second cylinder. The outer diameters of the two sections of the cylinder are equal, and the outer diameter of the cylinder only needs to meet the minimum requirement of the cylinder absorbing component installation error, thereby reducing the influence of the excessive outer diameter of the cylinder on the spacing of steel bars and the cross-sectional size of prefabricated components, reducing the amount of concrete used, and helping to ensure the quality of concrete pouring in the cast-in-place part.
[0015] 3. The utility model divides the long full grouting sleeve into two independent left and right sections for grouting respectively, which can reduce the pressure required for grouting and make it easier to ensure the grouting quality of the inner cavity of the cylinder. Thus, the connection quality of the steel sleeve grouting connection joint is improved, the demand for butt connection between steel bars of prefabricated components in a small space is met, the construction speed is increased, and the construction quality of the connection node is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional schematic diagram of the split full grouting sleeve of the utility model.
[0017] Figure 2 It is a cross-sectional schematic diagram of the split full grouting sleeve of the utility model.
[0018] Figure 3 It is a connection schematic diagram of the split full grouting sleeve of the utility model.
[0019] In the figure: 1. split full grouting sleeve, 2. first cylinder, 3. second cylinder, 4. grouting hole, 5. slurry outlet hole, 6. internal joint, 7. external thread, 8. outer joint, 9. internal thread, 10. grouting material, 11. connected steel bars, 12. prefabricated component. DETAILED DESCRIPTION
[0020] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] Embodiment 1:
[0022] like Figure 1-2As shown, the split full grouting sleeve 1 of the utility model is composed of a first cylinder 2 and a second cylinder 3 with equal outer diameters, which are coaxially connected. The specific structure is as follows: a grouting hole 4 and a slurry outlet hole 5 are respectively provided on the first cylinder 2 and the second cylinder 3, and the grouting hole 4 and the slurry outlet hole 5 are both located on the same side of the first cylinder 2 or the second cylinder 3, the grouting hole 4 is on the left side, and the slurry outlet hole 5 is on the right side, so that the inner cavity of the first cylinder 2 or the second cylinder 3 is connected with the outer surface; at the connection between the first cylinder 2 and the second cylinder 3, the end of the first cylinder 2 protrudes into an inner joint 6 with an external thread 7, and the end of the second cylinder 3 is recessed into an outer sleeve joint 8 with an internal thread 9, and the external thread 7 and the internal thread 9 match each other. The two sections of the cylinder are threadedly connected to form a full grouting sleeve. The threaded connection portion divides the full grouting sleeve into two left and right sections of the cylinder with independent inner cavities. Grouting material 10 is respectively injected into the two sections of the cylinder and fixedly connected to the connected steel bars 11, and fixedly connected to the connected steel bars 11 after hardening. The first cylinder 2 and the second cylinder 3 can be formed by casting, or can be made of seamless steel pipes by mechanical processing. The split full-grouting sleeve is used for butt connection between steel bars of precast concrete components in a small space.
[0023] like Figure 3 As shown, the construction process of the split full grouting sleeve of the utility model is as follows:
[0024] (1) The first cylinder 2 and the second cylinder 3 are respectively inserted into the connected steel bars 11 extending from the ends of the prefabricated components 12;
[0025] (2) hoisting the prefabricated component 12 to the preset position, butting the two sections of the cylinder together and then twisting them relative to each other for threaded connection;
[0026] (3) Grouting material 10 is injected into the inner cavity of the first cylinder 2 and the inner cavity of the second cylinder 3 through the grouting hole 4, and the grouting material 10 is fixedly connected to the two connected steel bars 11 respectively. After the grouting material 10 hardens, the two connected steel bars 11 are butt-connected.
[0027] The results of the examples show that the split full grouting sleeve in the utility model can greatly shorten the required installation operation space, and only requires the node section length to be greater than the total length of the cylinder, which is particularly suitable for the butt connection of horizontal steel bars in a small space. At the same time, the smaller outer diameter of the cylinder can reduce the impact on the spacing between steel bars and the cross-sectional dimensions of prefabricated components. The independent grouting operation of the two sections of the cylinder can reduce the pressure required for grouting, and it is easier to ensure the grouting quality of the cylinder cavity. Thus, the connection quality of the steel sleeve grouting connection joint is improved, the needs of butt connection between steel bars of prefabricated components in a small space are met, and the construction speed is increased and the construction quality of the connection node is ensured.
[0028] Obviously, as technology progresses, those skilled in the art can implement the concept of the present invention in various ways. The present invention and its embodiments are not limited to the examples shown above, but can be varied within the framework of the claims.
Claims
1. A split full grouting sleeve, characterized in that: The sleeve is composed of a first cylinder and a second cylinder coaxially connected. The first cylinder and the second cylinder have the same outer diameters, and are provided with grouting holes and grouting holes. The grouting holes and the grouting holes are located on the same side of the first cylinder or the second cylinder, connecting the inner cavity of the first cylinder and the second cylinder with the outer surface. The first cylinder and the second cylinder form a fully grouting sleeve through a threaded connection structure. The threaded connection portion divides the fully grouting sleeve into two left and right sections of cylinders with independent inner cavities. The two sections of the cylinders are fixedly connected to the connected steel bars by injecting grouting material.
2. A split full grouting sleeve according to claim 1, characterized in that: The two sections of the cylinder body are connected by a threaded structure to form a detachable split full grouting sleeve with equal outer diameters.
3. A split full grouting sleeve according to claim 1 or 2, characterized in that: The threaded connection structure comprises an inner joint protruding from the end of the first cylinder and an outer joint recessed from the end of the second cylinder. The outer wall of the inner joint and the inner wall of the outer joint are evenly provided with mutually matching threads.
4. A split full grouting sleeve according to claim 3, characterized in that: The inner joint of the threaded connection structure is a solid structure, which divides the assembled full grouting sleeve into two left and right cylinders with independent inner cavities. The two cylinders are fixedly connected to the connected steel bars by injecting grouting materials.
5. A split full grouting sleeve according to claim 1, characterized in that: The first cylinder and the second cylinder are formed by casting or by machining seamless steel pipes.