A threaded sleeve for reinforcing steel

Abstract

This invention belongs to the field of building construction, and specifically relates to a rebar threaded sleeve, comprising a cylindrical body, one end of which is a thin sleeve and the other end is a coarse sleeve, the thin sleeve and the coarse sleeve being connected. A collar is provided inside the coarse sleeve. The inner wall of the thin sleeve and the inner wall of the collar are provided with a first internal thread of the same specification. The inner wall of the coarse sleeve is provided with a second internal thread, and the outer wall of the collar is provided with a second external thread matching the second internal thread. The collar is screwed into the inside of the coarse sleeve through the second internal thread and the second external thread. This invention has a simple structure, is easy to install and disassemble; during use, after the rebar is assembled, there are no exposed threads; it can realize the overall assembly of rebar components, reducing on-site fabrication and realizing the prefabrication of rebar components, requiring only assembly on-site, thus improving quality and construction efficiency.

Description

Technical Field

[0001] This invention belongs to the field of building construction, and specifically relates to a rebar threaded sleeve. Background Technology

[0002] The common method for connecting steel bars on construction sites is to thread the ends of the steel bars to form external threads, and then use a suitable sleeve for bolting.

[0003] During construction, it was found that most current rebar connections use single-strand connections, requiring the rebar to rotate or move to connect two rebars. Furthermore, for multiple rebars on the same plane, overall assembly is not possible, severely hindering the promotion of rebar assembly concepts. Although single-threaded sleeves are available for connection, one rebar must be movable when connecting two rebars, failing to meet the requirements of overall assembly. If both rebars are fixed, many threads will be exposed when connected via a threaded sleeve, which does not comply with national standards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned technical problems and provide a steel bar threaded sleeve with a simple structure and easy operation.

[0005] A rebar threaded sleeve includes a cylindrical body, one end of which is a thin sleeve and the other end is a coarse sleeve. The thin sleeve and the coarse sleeve are connected. A collar is provided inside the coarse sleeve. The inner wall of the thin sleeve and the inner wall of the collar are both provided with a first internal thread. The inner wall of the coarse sleeve is provided with a second internal thread. The outer wall of the collar is provided with a second external thread that matches the second internal thread. The collar is screwed into the inside of the coarse sleeve through the second internal thread and the second external thread.

[0006] The coarse sleeve is provided with a grouting hole and an overflow hole, both of which extend from the outer wall of the coarse sleeve into the inner wall.

[0007] The thread direction of the first internal thread is the same as that of the second internal thread.

[0008] The thread diameter of the first internal thread is smaller than the thread diameter of the second internal thread.

[0009] The length of the second internal thread on the inner wall of the coarse sleeve is the sum of half the length of the first internal thread on the inner wall of the fine sleeve and the thickness of the collar.

[0010] Preferably, it also includes short-toothed reinforcing bars and long-toothed reinforcing bars. The short-toothed reinforcing bars are provided with short teeth that match the first internal thread, and the long-toothed reinforcing bars are provided with long teeth that match the first internal thread. The length of the short-toothed thread is half the length of the first internal thread on the inner wall of the thin sleeve, and the length of the long-toothed thread is twice the sum of the length of the short-toothed thread and the thickness of the collar.

[0011] The present invention has the following advantages: simple structure, easy to install and disassemble; less exposed thread after steel bar assembly; can realize the overall assembly of steel bar components, reduce on-site fabrication, realize the prefabrication of steel bar components, and only need to assemble on-site, which can improve quality and construction efficiency; the steel bars connected by the present invention can be grouted through grouting holes when strength needs to be increased, further improving the connection quality. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of a rebar threaded sleeve according to the present invention;

[0013] Figure 2 This is a schematic diagram of an inner collar of a rebar threaded sleeve according to the present invention;

[0014] Figure 3 This is a schematic diagram of a short-toothed steel bar for a steel bar threaded sleeve according to the present invention;

[0015] Figure 4 This is a schematic diagram of a long-toothed steel bar in a steel bar threaded sleeve according to the present invention;

[0016] Figure 5 This is a schematic diagram of the rebar threaded sleeve of the present invention before it is connected to long-toothed rebar and short-toothed rebar;

[0017] Figure 6 This is a schematic diagram of a rebar threaded sleeve of the present invention after being connected with long-toothed rebar and short-toothed rebar;

[0018] Figure 7 This is a schematic diagram illustrating the use of a rebar threaded sleeve according to the present invention.

[0019] Figure 8 This is a schematic diagram of the connection of an existing straight threaded sleeve.

[0020] As shown in the figure: 1. Fine sleeve; 2. Coarse sleeve; 3. Collar; 4. First internal thread; 5. Second internal thread; 6. Second external thread; 7. Short thread reinforcing bar; 701. Short thread; 8. Long thread reinforcing bar; 801. Long thread; 9. Grouting hole; 10. Overflow hole; 11. Concrete block; 12. Fixed reinforcing bar; 13. Straight thread sleeve; 14. Movable reinforcing bar. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] As shown in the figure, this is a schematic diagram of the use of a straight threaded sleeve in the prior art. The fixed reinforcing bar 12 is fixed to the concrete block 11. The straight threaded sleeve 13 is used to connect the fixed reinforcing bar 12 and the movable reinforcing bar 14 by rotating and moving the movable reinforcing bar 14. In addition, the straight threaded sleeve 13 can also be used to connect two movable reinforcing bars. However, if both reinforcing bars are fixed and the existing straight threaded sleeve 13 is used, after the two reinforcing bars are joined, the thread of one of them will be severely exposed, which does not meet the national standard.

[0023] This invention discloses a rebar threaded sleeve, comprising a cylindrical body, one end of which is a thin sleeve 1 and the other end is a coarse sleeve 2. The thin sleeve 1 and the coarse sleeve 2 are connected. The coarse sleeve 2 is provided with a collar 3 inside. The inner walls of the thin sleeve 1 and the collar 3 are both provided with a first internal thread 4. The inner wall of the coarse sleeve 2 is provided with a second internal thread 5. The outer wall of the collar 3 is provided with a second external thread 6 that matches the second internal thread 5. The collar 3 is screwed into the coarse sleeve 2 through the second internal thread 5 and the second external thread 6.

[0024] The coarse sleeve 2 is provided with a grouting hole 9 and an overflow hole 10. Both the grouting hole 9 and the overflow hole 10 extend from the outer wall of the coarse sleeve 2 into the inner wall.

[0025] The thread direction of the first internal thread 4 is the same as that of the second internal thread 5.

[0026] The thread diameter of the first internal thread 4 is smaller than the thread diameter of the second internal thread 5.

[0027] The length of the second internal thread 5 on the inner wall of the coarse sleeve 2 is the sum of half the length of the first internal thread 4 on the inner wall of the fine sleeve 1 and the thickness of the collar 3.

[0028] It also includes short-toothed steel bars 7 and long-toothed steel bars 8. The short-toothed steel bars 7 are provided with short teeth 701 that match the first internal thread 4, and the long-toothed steel bars 8 are provided with long teeth 801 that match the first internal thread 4. The thread length of the short teeth 701 is half the thread length of the first internal thread 4 on the inner wall of the thin sleeve 1, and the thread length of the long teeth 801 is twice the sum of the thread length of the short teeth 701 and the thickness of the collar 3.

[0029] like Figure 5 and Figure 6As shown, in the process of using this invention, the long teeth of the long-toothed steel bar 8 are first screwed to the collar 3, and then the collar 3 is screwed to the coarse sleeve 2. Finally, it is screwed to screw the long tooth 801 end of the long-toothed steel bar 8 into the fine sleeve 1, and the end face of the long tooth 801 is screwed to be flush with the end face of the fine sleeve 1 away from the coarse sleeve. At this time, one side of the collar 3 is in contact with the mating end face of the fine sleeve 1 and the coarse sleeve 2. In addition, the end face of the short tooth 701 of the short-toothed steel bar 7 is aligned with the end face of the long tooth 801 of the long-toothed steel bar 8. During the connection, the positions of the short-toothed steel bar 7 and the long-toothed steel bar 8 do not move. The sleeve of this invention is screwed, and the short tooth 701 of the short-toothed steel bar 7 is screwed into the fine sleeve 1 until all the outer teeth of the short-toothed steel bar 7 are in the fine sleeve 1. During the process, the long-toothed steel bar 8 makes way for the short-toothed steel bar 7, and the collar 3 moves to the outer end face of the coarse sleeve 2 as the sleeve of this invention moves.

[0030] The design takes into account the problem of exposed threads. By setting the thread length of the short-toothed steel bar 7 and the long-toothed steel bar 8, as well as the thread depth of the first internal thread and the second internal thread inside the cylinder, the problem of exposed threads at the connection between the steel bar and the sleeve is solved.

[0031] Embodiments of the present invention, such as Figure 7 As shown, when connecting multiple long-toothed steel bars 8 and short-toothed steel bars 7, the present invention can connect the long-toothed steel bars 8 and short-toothed steel bars 7 by simply operating the sleeve of the present invention in the aforementioned manner. After connection, the existing stirrups are used for binding, and the connection is successful. The operation is convenient and quick, and the construction efficiency is high.

[0032] Furthermore, when high connection strength is required, the long-toothed steel bar 8 and the short-toothed steel bar 7 connected by the sleeve of the present invention can be grouted using the grouting hole 9 on the sleeve. During the grouting process, air inside the sleeve is continuously discharged from the overflow hole 10. When grout overflows from the overflow hole 10, it indicates that the air has been discharged and the grouting is complete, further improving the connection strength.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A rebar threaded sleeve, characterized in that: The device includes a cylindrical body, one end of which is a thin sleeve (1) and the other end is a coarse sleeve (2). The thin sleeve (1) and the coarse sleeve (2) are connected. The coarse sleeve (2) is provided with a collar (3). The inner wall of the thin sleeve (1) and the inner wall of the collar (3) are both provided with a first internal thread (4). The inner wall of the coarse sleeve (2) is provided with a second internal thread (5). The outer wall of the collar (3) is provided with a second external thread (6) that matches the second internal thread (5). The collar (3) is screwed into the inside of the coarse sleeve (2) through the second internal thread (5) and the second external thread (6). The coarse sleeve (2) is provided with a grouting hole (9) and an overflow hole (10), and both the grouting hole (9) and the overflow hole (10) extend from the outer wall of the coarse sleeve (2) into the inner wall; The thread direction of the first internal thread (4) is the same as the thread direction of the second internal thread (5); The thread diameter of the first internal thread (4) is smaller than the thread diameter of the second internal thread (5); The length of the second internal thread (5) on the inner wall of the coarse sleeve (2) is half the length of the first internal thread (4) on the inner wall of the fine sleeve (1) and the thickness of the collar (3).

2. The rebar threaded sleeve according to claim 1, characterized in that: It also includes short-toothed steel bars (7) and long-toothed steel bars (8). The short-toothed steel bars (7) are provided with short teeth (701) that match the first internal thread (4). The long-toothed steel bars (8) are provided with long teeth (801) that match the first internal thread (4). The thread length of the short teeth (701) is half the thread length of the first internal thread (4) on the inner wall of the thin sleeve (1). The thread length of the long teeth (801) is twice the sum of the thread length of the short teeth (701) and the thickness of the collar (3).

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