Prefabricated wall body connected through straight thread sleeve

Abstract

The utility model discloses a prefabricated wall body connected by a straight thread sleeve, which comprises a concrete body, a lower end connecting steel bar is arranged at the bottom of the concrete body in an extending manner, an upper end connecting steel bar is arranged at the top of the concrete body in an extending manner, and a steel bar pier head is arranged at the end part of the lower end connecting steel bar. A first sleeve is arranged on the outer surface of the steel bar pier head, internal threads are arranged on the inner wall of the first sleeve, a second sleeve is arranged at the top end of the upper end connecting steel bar, and external threads are arranged on the outer surface of the second sleeve. During assembly, the second sleeve of the prefabricated wall body located on the lower portion and the first sleeve of the prefabricated wall body located on the upper portion are connected into a whole through the internal threads and the external threads. The connecting structure is convenient and rapid to install, high in connecting strength performance and good in construction quality.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, in particular to a prefabricated wall connected by a straight thread sleeve. Background Art

[0002] Prefabricated buildings refer to buildings in which some or all of the components and parts are produced in a prefabrication plant, then transported to the construction site, and assembled using reliable connection methods and installation machinery to form a building with designed functions. Compared with cast-in-place structure construction, prefabricated structures have the advantages of convenient construction, fast project progress, little impact on the surrounding environment, and easy quality assurance of building components. Prefabricated concrete structures have positive significance in promoting the progress of urban construction, improving project quality, promoting energy conservation and emission reduction, improving the living environment, and transforming the production methods of the construction industry.

[0003] Sleeve grouting connection is one of the main connection methods currently used in prefabricated concrete structures. The steel bar connection is achieved by pouring a steel sleeve with a shear groove inside and high-strength, non-shrinkage grouting material. However, the traditional sleeve grouting connection method still has many defects. The first is the grouting material. First, during the construction process, it is easy for the sleeve to not be filled with grouting material due to improper operation of the workers. For example, as soon as the grouting hole is seen to overflow, the grouting is stopped without holding the pressure for a period of time, the grouting port is not sealed in time after the grouting is completed, and there are foreign objects blocking the bottom joints between the wall and the floor slab before grouting, or the bottom joints are not well constructed, resulting in the bottom joints bursting. Secondly, even if there is no problem in the grouting process, the slurry in the sleeve is full. If too much or too little water is added during the preparation of the grouting material, it will affect the strength of the grouting material, thereby affecting the stability of the structure, increasing the cost of later inspections and the safety hazards of the house. Finally, the sleeve grouting connection method requires tedious steps such as stirring grouting material, pouring grouting material, and cleaning grouting residue after the component is hoisted, which increases the construction period and cost. Secondly, in terms of the connecting steel bars in the sleeve, there are three reasons in the actual construction process, which lead to a reduction in the insertion length of the connecting steel bars in the sleeve: (1) Due to deviations in component production or on-site installation, the lower connecting steel bars cannot be put in place, and some of the lower connecting steel bars are cut short or cut off; (2) Since the reserved steel bars at the top of the lower prefabricated component, in addition to being inserted into the sleeve at the bottom of the upper prefabricated component, must also pass through the composite floor between the upper and lower prefabricated components and the bottom joint of the upper prefabricated component, if the thickness of the cast-in-place layer of the composite floor is not well controlled, it will affect the depth of the connecting steel bars inserted into the sleeve; (3) Similarly, if the thickness of the bottom joint is not well controlled, it will also affect the depth of the connecting steel bars inserted into the sleeve. The above problems will eventually reduce the effective anchoring length of the steel bars, resulting in the strength of the steel sleeve grouting connection joint not meeting the requirements, posing a safety hazard.

[0004] In summary, a new type of sleeve connection method is needed to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a prefabricated wall body connected by a straight thread sleeve, which is convenient and quick to install, has high connection strength performance and good construction quality.

[0006] In order to solve the above technical problems, the utility model provides a prefabricated wall connected by a straight thread sleeve, comprising a concrete body, a lower end connecting steel bar is provided at the bottom of the concrete body, an upper end connecting steel bar is provided at the top of the concrete body, a steel bar pier head is provided at the end of the lower end connecting steel bar, a first sleeve is provided on the outer surface of the steel bar pier head, an internal thread is provided on the inner wall of the first sleeve, a second sleeve is provided on the top of the upper end connecting steel bar, and an external thread is provided on the outer surface of the second sleeve;

[0007] During assembly, the second sleeve of the prefabricated wall located at the lower part is connected to the first sleeve of the prefabricated wall located at the upper part through internal threads and external threads.

[0008] Furthermore, vertical connecting steel bars are arranged inside the concrete body, and both ends of the vertical connecting steel bars extend out of the end surface of the concrete body to form upper connecting steel bars and lower connecting steel bars; the distance between the bottom of the second sleeve and the top surface of the concrete body is greater than the thickness of the floor slab.

[0009] Furthermore, the diameters of the upper connecting steel bars and the lower connecting steel bars are equal, and the diameter of the steel bar head is larger than the diameter of the lower connecting steel bars.

[0010] Furthermore, the outer surface of the steel bar pier head is connected to the first sleeve via threads, and the top end of the upper end connected to the steel bar is connected to the second sleeve via threads.

[0011] Furthermore, the second sleeve is configured as a boss structure, an outer surface of a small end of the second sleeve is provided with an external thread, and an inner surface of a large end of the second sleeve is provided with an internal thread.

[0012] Furthermore, the interior of the small end of the second sleeve is configured as a solid structure.

[0013] Furthermore, the steel bar pier head can be manufactured by hot upsetting, and the length of the steel bar pier head is greater than or equal to the length of the first sleeve.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model adopts a separate straight thread connection, which is easy and fast to install, has high joint strength performance, and is a pure mechanical connection without grouting, avoiding structural safety problems caused by errors in the slurry preparation or grouting process, and greatly reducing the later detection cost and the repair cost of incomplete grouting.

[0016] 2. After the upper and lower components are mechanically connected, the connecting parts are finally filled in the form of cast-in-place, which has better integrity.

[0017] 3. The utility model needs to first hold the lower connecting steel bar against the second sleeve installed on the upper connecting steel bar, and then connect them with the first sleeve. If the steel bar is not long enough, the assembly cannot be completed, which eliminates the problem that the steel bar insertion length in the sleeve is insufficient after the traditional grouting sleeve is hoisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the wall structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the lower end connecting steel bar portion of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the upper end connecting steel bar portion of the utility model;

[0021] Figure 4 It is a schematic diagram of the positional relationship between the lower wall and the upper wall during the hoisting of the utility model;

[0022] Figure 5 It is a schematic diagram of the lower end connecting steel bar abutting against the corresponding second sleeve during the hoisting of the utility model;

[0023] Figure 6 It is a schematic diagram of the first sleeve and the second sleeve after being locked during hoisting of the utility model. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0025] Reference Figures 1 to 6As shown, an embodiment of a prefabricated wall connected by a straight threaded sleeve of the utility model comprises a concrete body 1, a lower end connecting steel bar 2 is provided on the bottom of the concrete body, an upper end connecting steel bar 3 is provided on the top of the concrete body, a steel bar head 21 is provided on the end of the lower end connecting steel bar, a first sleeve 4 is provided on the outer surface of the steel bar head, an internal thread is provided on the inner wall of the first sleeve, a second sleeve 5 is provided on the top of the upper end connecting steel bar, and an external thread is provided on the outer surface of the second sleeve; when assembled, the second sleeve of the prefabricated wall located at the lower part is connected to the first sleeve of the prefabricated wall located at the upper part as a whole through the internal thread and the external thread.

[0026] Before use, the first sleeve and the second sleeve can be pre-set on the lower connecting steel bar and the upper connecting steel bar. In order to ensure that the first sleeve and the second sleeve do not fall off during transportation and assembly, and also to ensure the connection strength, the outer surface of the steel bar pier head is connected to the first sleeve by a thread, and the top end of the upper connecting steel bar is connected to the second sleeve by a thread;

[0027] When assembling two adjacent overlapping concrete prefabricated walls, first assemble the prefabricated bottom plate of the superimposed floor on the top of the lower prefabricated wall and cast it to form the floor. After the casting is completed, it is necessary to ensure that the second sleeve sleeve connection end is completely exposed from the floor. The upper prefabricated wall to be installed is hoisted to the position where it is installed in coordination with the lower prefabricated wall. The relative position of the two prefabricated walls is fixed at the designed installation position, and the upper end connecting steel bars and the lower end connecting steel bars on the two prefabricated walls are basically coaxial and opposite. Refer to Figure 4 As shown; then the upper prefabricated component is lowered so that the steel bar head connected to the steel bar at the lower end is supported by the top of the second sleeve, referring to Figure 5 As shown; then the first sleeve installed on the lower end connecting steel bar is screwed onto the second sleeve to complete the connection between the components. After the connection is completed, the gap between the lower prefabricated wall and the upper prefabricated wall is filled with cast-in-place concrete to complete the connection installation of the node.

[0028] Specifically, the upper connecting steel bars and the lower connecting steel bars are formed by extending the vertical connecting steel bars 6 inside the concrete body, so that the upper connecting steel bars and the lower connecting steel bars have good connection strength, and the distance between the bottom of the second sleeve and the top surface of the concrete body is greater than the thickness of the floor slab 7, that is, in the portion of the upper connecting steel bar exposed outside the concrete body, the length of the non-threaded section is greater than the thickness of the floor slab, so that after the floor slab is prepared, the second sleeve is above the floor slab to avoid interference with the assembly work.

[0029] Since the upper connecting steel bars and the lower connecting steel bars are both extended parts of the vertical connecting steel bars, the diameters of the upper connecting steel bars and the lower connecting steel bars are equal, and at the steel bar pier head at the end of the lower connecting steel bar, the steel bar pier head is made by hot upsetting, and the length of the steel bar pier head is greater than or equal to the length of the first sleeve. Before assembly, the first sleeve is screwed onto the steel bar pier head, and it can be ensured that the bottom of the first sleeve is flush with the bottom of the steel bar pier head, so that the first sleeve will not interfere with the second sleeve during the assembly process, and it can be quickly determined whether the steel bar pier head is abutted against the top of the second sleeve. The diameter of the steel bar pier head is greater than the diameter of the lower connecting steel bar, thereby improving the connection strength here.

[0030] After the first sleeve is screwed onto the second sleeve, in order to facilitate judgment and operation, the second sleeve is designed as a boss structure, an external thread is arranged on the outer surface of the small end of the second sleeve, and the small end is used to connect with the first sleeve, an internal thread is arranged on the inner surface of the large end of the second sleeve, and the large end is used to connect with the upper end connecting steel bar, and the interior of the small end of the second sleeve is arranged as a solid structure to ensure the connection strength.

[0031] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in this technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A prefabricated wall connected by a straight thread sleeve, characterized in that: The concrete body comprises a concrete body, wherein a lower end connecting steel bar is provided at the bottom of the concrete body, an upper end connecting steel bar is provided at the top of the concrete body, a steel bar head is provided at the end of the lower end connecting steel bar, a first sleeve is provided on the outer surface of the steel bar head, an inner wall of the first sleeve is provided with an internal thread, a second sleeve is provided at the top end of the upper end connecting steel bar, and an external thread is provided on the outer surface of the second sleeve; During assembly, the second sleeve of the prefabricated wall located at the lower part is connected to the first sleeve of the prefabricated wall located at the upper part through internal threads and external threads.

2. The prefabricated wall connected by straight thread sleeves according to claim 1, characterized in that: Vertical connecting steel bars are arranged inside the concrete body, and both ends of the vertical connecting steel bars extend out of the end surface of the concrete body to form upper connecting steel bars and lower connecting steel bars; the distance between the bottom of the second sleeve and the top surface of the concrete body is greater than or equal to the thickness of the floor slab.

3. The prefabricated wall connected by straight thread sleeves according to claim 2, characterized in that: The diameters of the upper connecting steel bars and the lower connecting steel bars are equal, and the diameter of the steel bar pier head is larger than the diameter of the lower connecting steel bars.

4. The prefabricated wall connected by straight threaded sleeves according to claim 1, characterized in that: The outer surface of the steel bar pier head is connected to the first sleeve through threads, and the top end of the upper end connecting steel bar is connected to the second sleeve through threads.

5. The prefabricated wall connected by straight thread sleeves according to claim 4, characterized in that: The second sleeve is configured as a boss structure, an outer surface of a small end of the second sleeve is provided with an outer thread, and an inner surface of a large end of the second sleeve is provided with an inner thread.

6. The prefabricated wall connected by straight threaded sleeves according to claim 5, characterized in that: The interior of the small end of the second sleeve is arranged to be a solid structure.

7. The prefabricated wall connected by straight thread sleeves according to claim 1, characterized in that: The steel bar pier head can be made by hot upsetting method, and the length of the steel bar pier head is greater than or equal to the length of the first sleeve.

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