Adjustable steel bar connecting sleeve for steel reinforced concrete beam-column joint

Abstract

An adjustable reinforcing steel bar connecting sleeve for a steel reinforced concrete beam column joint belongs to the technical field of cast-in-place concrete construction, and comprises a first reinforcing steel bar, a second reinforcing steel bar, a fixed sleeve and a movable sleeve, the fixed sleeve and the first reinforcing steel bar are directly welded into a whole, the movable sleeve is sleeved on the second reinforcing steel bar, and when connection is needed, the movable sleeve is sleeved on the second reinforcing steel bar. The first steel bar and the second steel bar can be connected by clockwise rotating the movable sleeve and screwing into the fixed sleeve. The utility model has the advantages that the construction quality is effectively ensured, the fastening degree meets the design requirement, the operation is simple, the installation is convenient, the working efficiency is higher, the labor cost is greatly reduced, the assembly type requirement is met, no construction waste exists, the energy is saved, the environment is protected, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-in-place concrete construction, and particularly relates to an adjustable steel bar connecting sleeve for a steel reinforced concrete beam-column joint. Background Technique

[0002] With the acceleration of the urbanization process, in order to make full use of limited land, buildings are continuously developing towards high-rise and super high-rise. For simple reinforced concrete beam-column members, their cross-sectional dimensions often need to be made very large to meet the load-bearing capacity requirements. This will not only occupy more indoor space of the building, affecting the use function and aesthetics of the building, but also the excessive self-weight of the members will bring a greater burden to the foundation. By configuring steel profiles in concrete, the high-strength characteristics of steel can be fully utilized to effectively improve the load-bearing capacity of the members. Under the same load-bearing capacity requirements, the steel reinforced concrete beam-columns can reduce the cross-sectional dimensions compared with the traditional reinforced concrete beam-columns, thereby increasing the available space inside the building and better meeting the requirements of modern buildings for space and function.

[0003] However, problems will be encountered in the actual construction process. In the connection area of the beam-column joints of steel reinforced concrete, the steel profiles occupy a certain space, and a large number of column longitudinal bars, beam longitudinal bars, stirrups, etc. are arranged at the same time. The contour shape and size of the steel profiles will conflict with the trend of the steel bars, resulting in difficulty for the steel bars to pass through the joint area smoothly according to the conventional layout method. When connecting the steel bars and the steel profiles by welding, due to the dense arrangement of the steel bars and the steel profiles in the joint area and the narrow operating space, it is difficult for welders to perform welding operations, and it is difficult to ensure the welding quality. Mechanical connection also has inconveniences in the steel reinforced concrete beam-column joints. For example, when using a straight thread sleeve connection, installing the sleeve in the joint area may be blocked by the steel profiles, making it difficult to accurately install and tighten the sleeve in place. Moreover, due to the limited space, it is also difficult to use the tools for tightening the sleeve, and it is impossible to ensure that the fastening degree of the connection reaches the design requirements. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies such as the multi-directional steel bar intersection problem, difficult weld connection, and inconvenient mechanical connection in the steel reinforced concrete beam-column joints, and to propose an adjustable steel bar connecting sleeve for a steel reinforced concrete beam-column joint, aiming to solve the steel bar connection problem at the beam-column joints. By using this sleeve, while ensuring that the fastening degree of the connection reaches the design requirements, the working procedures can be effectively simplified, and the strength and reliability of the connection joints can be effectively guaranteed.

[0005] The technical solution adopted by the utility model to solve its technical problem is:

[0006] A steel reinforced concrete beam-column joint adjustable steel bar connecting sleeve, comprising a first steel bar, a second steel bar, a fixed sleeve and a movable sleeve. The fixed sleeve is integrally welded to the first steel bar. The movable sleeve is sleeved on the second steel bar. When connection is required, the movable sleeve is rotated forward and screwed into the fixed sleeve to connect the first steel bar and the second steel bar.

[0007] Further, the tail end of the first steel bar is pre-welded and fixed to the side of the steel column in the factory.

[0008] Further, the connecting ends of the first steel bar and the second steel bar have threads of a certain length. Generally, the thread length of the connecting end of the second steel bar is twice that of the first steel bar.

[0009] Further, the inner part of the movable sleeve is provided with a through-long straight thread, and the outer surface connecting end is provided with a thread of half length.

[0010] Further, the thread diameter inside the movable sleeve matches the thread diameter of the second steel bar.

[0011] Further, the inner part of the fixed sleeve is provided with a straight thread, which matches the thread diameter and length of the outer surface of the movable sleeve.

[0012] Further, when the first steel bar and the second steel bar are butted, the movable sleeve is rotated forward and screwed into the fixed sleeve. While the movable sleeve bites the connecting end of the first steel bar, the fixed sleeve also bites the outer surface of the movable sleeve, which can effectively ensure the fastening degree.

[0013] Further, the screwing depth of the movable sleeve can be determined according to the length of the steel bar to achieve adjustability.

[0014] The technical principle of the present utility model:

[0015] The present utility model can cut the first steel bar, the second steel bar, the fixed sleeve and the movable sleeve according to the design requirements. The fixed sleeve and the first steel bar are welded and fixed to the side of the steel column according to the designed quantity and spacing, prefabricated and formed in the project. A movable sleeve of a fixed specification is selected and assembled on site to connect and fix the first steel bar and the second steel bar.

[0016] Compared with the prior art, the present utility model meets the connection requirements of the steel bars of the steel reinforced concrete beam-column joint and has the following advantages:

[0017] ① Effectively guarantee the construction quality and ensure that the fastening degree meets the design requirements; ② Simple operation, convenient installation and higher work efficiency; ③ Greatly reduce the labor cost; ④ Meet the prefabricated requirements, have no construction waste, and are energy-saving and environment-friendly. Description of the Drawings

[0018] Figure 1 It is the structural schematic axial view of the embodiment of the present utility model;

[0019] Figure 2 is Figure 1 The front view of the shown embodiment before installation;

[0020] Figure 3 is Figure 1 The rear axial view of the shown embodiment after assembly;

[0021] Figure 4 is Figure 1 The front view of the shown embodiment after assembly;

[0022] Figure 5 is Figure 1 The rear axial view of the shown embodiment after installation;

[0023] Figure 6 is Figure 1 The front view of the shown embodiment after installation;

[0024] Figure 7 is Figure 3 The end axial view of the shown embodiment;

[0025] Explanation of the reference numerals in the figure:

[0026] 1, the first steel bar, 2, the second steel bar, 3, the fixed sleeve, 4, the movable sleeve. Detailed implementation manners

[0027] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0028] Referring to Figures 1 to 7 , a steel reinforced concrete beam-column joint adjustable steel bar connecting sleeve, comprising a first steel bar 1, a second steel bar 2, a fixed sleeve 3 and a movable sleeve 4; the fixed sleeve 3 is integrally welded with the first steel bar 1 directly, the movable sleeve 4 is sleeved on the second steel bar 2, and when connection is required, the movable sleeve 4 is rotated forward and screwed into the fixed sleeve 3 to connect the first steel bar 1 and the second steel bar 2.

[0029] In this embodiment, the specification sizes of the first steel bar 1 and the second steel bar 2 are determined according to the steel bar reinforcement requirements of the steel reinforced concrete beam.

[0030] In this embodiment, the tail end of the first steel bar 1 is pre-welded and fixed to the side of the steel column in the factory.

[0031] In this embodiment, the connecting ends of the first steel bar 1 and the second steel bar 2 have a certain length of threads, and generally the thread length of the connecting end of the second steel bar 2 is twice that of the first steel bar 1.

[0032] In this embodiment, the inner part of the movable sleeve 4 is provided with a full-length straight thread, and the connecting end of the outer surface is provided with a half-length thread.

[0033] In this embodiment, the thread diameter inside the movable sleeve 4 matches the thread diameter of the second steel bar 2.

[0034] In this embodiment, straight threads are provided inside the fixed sleeve 3, which match the thread diameter and length of the outer surface of the movable sleeve 4.

[0035] In this embodiment, both the movable sleeve 4 and the fixed sleeve 3 are made of steel specified by the national standard.

[0036] In this embodiment, the first steel bar 1 and the second steel bar 2 are butted, and the movable sleeve 4 is screwed into the fixed sleeve 3 by rotating it in the forward direction. While the movable sleeve 4 bites the connecting end of the first steel bar 1, the fixed sleeve 3 also bites the outer surface of the movable sleeve 4, which can effectively ensure the fastening degree.

[0037] In this embodiment, the depth that the movable sleeve 4 is screwed into the fixed sleeve 3 can be determined according to the length of the steel bar, so as to achieve adjustability.

[0038] Construction process: First, determine the types of the first steel bar 1 and the second steel bar 2 according to the design requirements of the steel reinforced concrete beam, and then the corresponding specifications of the fixed sleeve 3 and the movable sleeve 4 can be selected; then the first steel bar 1 and the fixed sleeve 3 are pre-welded on the side of the steel section column in the factory according to the required quantity and spacing of the design. During on-site installation, only the movable sleeve 4 needs to be sleeved on the second steel bar 2 and screwed into the fixed sleeve 3 to complete the mechanical connection of the first steel bar 1 and the second steel bar 2.

[0039] The utility model meets the connection requirements of the steel bars at the joints of steel reinforced concrete beams and columns, and has the following advantages:

[0040] ① Effectively guarantee the construction quality and ensure that the fastening degree meets the design requirements; ② The process is simple, the installation is convenient, and the working efficiency is higher; ③ The labor cost is greatly reduced; ④ Meet the requirements of prefabrication, without construction waste, energy-saving and environmental protection.

Claims

1. An adjustable steel bar connecting sleeve for a steel reinforced concrete beam-column joint, characterized in that: It includes a first steel bar, a second steel bar, a fixed sleeve and a movable sleeve. The fixed sleeve is integrally welded to the first steel bar directly. The movable sleeve is sleeved on the second steel bar. When connection is needed, the movable sleeve is rotated forward and screwed into the fixed sleeve to connect the first steel bar and the second steel bar.

2. The adjustable steel bar connecting sleeve for steel reinforced concrete beam-column joints according to claim 1, characterized in that: The tail end of the first steel bar is pre-welded and fixed to the side of the steel section column in the factory.

3. The adjustable steel bar connecting sleeve for the steel reinforced concrete beam-column joint according to claim 1 or 2, characterized in that: The connecting ends of the first steel bar and the second steel bar have threads of a certain length. The thread length of the connecting end of the second steel bar is twice that of the first steel bar.

4. The adjustable steel bar connecting sleeve for SRC beam-column joints according to claim 3, characterized in that: The inner part of the movable sleeve is provided with a full-length straight thread, and the connecting end of the outer surface is provided with a thread of half length.

5. The adjustable steel bar connecting sleeve for steel reinforced concrete beam-column joints according to claim 4, characterized in that: The thread diameter inside the movable sleeve matches the thread diameter of the second steel bar.

6. The adjustable steel bar connecting sleeve for the steel reinforced concrete beam-column joint according to claim 5, characterized in that: The inner part of the fixed sleeve is provided with a straight thread, which matches the thread diameter and length of the outer surface of the movable sleeve.

7. The adjustable steel bar connecting sleeve for the steel reinforced concrete beam-column joint according to claim 6, wherein: The first steel bar and the second steel bar are butted, and the movable sleeve is rotated forward and screwed into the fixed sleeve. While the movable sleeve bites the connecting end of the first steel bar, the fixed sleeve also bites the outer surface of the movable sleeve.

8. The adjustable steel bar connecting sleeve for the SRC beam-column joint according to claim 7, characterized in that: The screwing depth of the movable sleeve is determined according to the length of the steel bar to achieve adjustability.

Images