Assembly type concrete prefabricated accessory connecting structure
By introducing an internal threaded sleeve, a connecting sleeve, a grouting sleeve, and a grout discharge mechanism into the rebar sleeve connection structure, the problem of lack of limiting between the sleeve and the rebar is solved, the stability of precast concrete and the uniformity of grout filling are improved, and the reliability of the connection is enhanced.
Patent Information
- Application Number
- CN202520416095.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In the existing rebar sleeve grouting connection method, there is a lack of limiting structure between the sleeve and the rebar, resulting in poor stability after the prefabricated concrete is installed.
The sleeve is composed of an internal threaded sleeve, a connecting sleeve, and a grouting sleeve, and is fixed by internal hex bolts. Combined with a grout discharge mechanism, it ensures that the grout is filled evenly. A tapered chamfered guide bar is inserted, and the installation angle is adjusted by a nut to achieve limit fixation.
It improves the stability of prefabricated concrete structures, ensures that the sleeve and reinforcing steel are not easily separated, and achieves uniform filling of grout, thus enhancing the reliability of the connection.
Smart Images
Figure CN223838438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated concrete technology, and in particular to a connection structure for prefabricated concrete components. Background Technology
[0002] Grouting connection of steel bar sleeves is a steel bar connection method in which prefabricated sleeves (precast accessories) are embedded in precast concrete, steel bars are inserted from both ends of the sleeves, and grout is injected to achieve the connection.
[0003] The existing sleeves and reinforcing bars are not directly connected. They are connected to the reinforcing bars inside the sleeve by injecting grout into the sleeve. Due to the lack of a limiting structure between the sleeve and the reinforcing bars, the stability of the prefabricated concrete after installation is poor. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a prefabricated concrete component connection structure, which solves the problems mentioned in the background section.
[0005] This utility model provides the following technical solution: a precast concrete component connection structure, including a first reinforcing bar and a second reinforcing bar embedded in the concrete. The outer side of the bottom end of the first reinforcing bar is threaded with an internal threaded sleeve. The bottom of the internal threaded sleeve is provided with a connecting sleeve fitted on the outer side of the top end of the second reinforcing bar. The bottom of the connecting sleeve is connected to a grouting sleeve located on the outer side of the second reinforcing bar. The internal threaded sleeve, the connecting sleeve, and the grouting sleeve form a sleeve. A connecting pipe is provided on the outer side of the connecting sleeve. The internal thread of the connecting pipe is threaded with an internal hexagonal bolt located on the outer side of the second reinforcing bar. The outer side of the top end of the grouting sleeve is connected to a grout outlet pipe, and the bottom end of the grouting sleeve is provided with a grouting hole located directly below the grout outlet pipe. The outer sides of the connecting pipe and the grout outlet pipe are jointly fixedly fitted with a grout discharge mechanism.
[0006] Preferably, a tapered chamfer is provided between the connecting sleeve and the grouting sleeve.
[0007] Preferably, the bottom end of the first reinforcing bar is threaded with a nut located above the inner thread sleeve on the outer side.
[0008] Preferably, the slurry discharge mechanism includes a first slurry discharge pipe fixedly sleeved on the outside of the connecting pipe and a second slurry discharge pipe fixedly sleeved on the outside of the slurry outlet pipe, and a guide pipe is connected between the first slurry discharge pipe and the second slurry discharge pipe.
[0009] This utility model has the following advantages:
[0010] 1. By tightening the internal hex bolts, the top of the second reinforcing bar can be pressed and fixed inside the connecting sleeve, so that there is a limiting structure between the sleeve and the second reinforcing bar, thereby ensuring that the sleeve is not easy to detach from the top of the second reinforcing bar, resulting in better stability after the prefabricated concrete is installed.
[0011] 2. By using the first row of grout pipes, the second row of grout pipes and the guide pipe in combination, when grouting is carried out into the grouting sleeve through the grouting hole, the grout discharged from the grout outlet pipe can be transported to the outside of the internal hexagon bolt, so that the grout can fill the grouting channel reserved inside the prefabricated concrete through the first row of grout pipes and the second row of grout pipes. Attached Figure Description
[0012] Figure 1 This is a cross-sectional view of the structure of this utility model;
[0013] Figure 2 This is a partial schematic diagram of the structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the slurry discharge mechanism of this utility model.
[0015] In the diagram: 1. First reinforcing bar; 2. Second reinforcing bar; 3. Internal threaded sleeve; 4. Connecting sleeve; 5. Grouting sleeve; 6. Connecting pipe; 7. Socket head bolt; 8. Grout outlet pipe; 9. Grouting hole; 10. Grout discharge mechanism; 101. First grout discharge pipe; 102. Second grout discharge pipe; 103. Guide pipe; 11. Conical chamfer; 12. Nut. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Please see Figures 1 to 3A precast concrete component connection structure includes a first reinforcing bar 1 and a second reinforcing bar 2 embedded in the concrete. The outer side of the bottom end of the first reinforcing bar 1 is threaded with an inner threaded sleeve 3. The bottom of the inner threaded sleeve 3 is provided with a connecting sleeve 4 fitted on the outer side of the top end of the second reinforcing bar 2. The bottom of the connecting sleeve 4 is connected to a grouting sleeve 5 located on the outer side of the second reinforcing bar 2. The inner threaded sleeve 3, the connecting sleeve 4, and the grouting sleeve 5 form a sleeve. A connecting pipe 6 is provided on the outer side of the connecting sleeve 4. The inner thread of the connecting pipe 6 is threaded with an internal hexagon bolt 7 located on the outer side of the second reinforcing bar 2. The outer side of the top end of the grouting sleeve 5 is connected to a grout outlet pipe 8. The bottom end of the grouting sleeve 5 is provided with a grouting hole 9 located directly below the grout outlet pipe 8. The outer sides of the connecting pipe 6 and the grout outlet pipe 8 are jointly fixedly fitted with a grout discharge mechanism 10. The grout discharge mechanism 10 can be limited and fixed by the connecting pipe 6 and the grout outlet pipe 8, so that the grout discharge mechanism 10 can be embedded in the concrete, thereby ensuring that it can communicate with the grouting channel inside the concrete.
[0018] A tapered chamfer 11 is provided between the connecting sleeve 4 and the grouting sleeve 5. The tapered chamfer 11 can guide the second reinforcing bar 2 to avoid misalignment, so that the second reinforcing bar 2 can be easily inserted into the interior of the connecting sleeve 4 during the installation of prefabricated concrete.
[0019] Among them, the bottom outer side of the first reinforcing bar 1 is threaded with a nut 12 located above the inner thread sleeve 3. The nut 12 can limit and fix the sleeve while adjusting the installation angle of the sleeve so that the grout pipe 8 can be installed perpendicular to the side of the concrete.
[0020] The slurry discharge mechanism 10 includes a first slurry discharge pipe 101 fixedly sleeved on the outside of the connecting pipe 6 and a second slurry discharge pipe 102 fixedly sleeved on the outside of the slurry outlet pipe 8. A guide pipe 103 is connected between the first slurry discharge pipe 101 and the second slurry discharge pipe 102. The guide pipe 103 can transport the slurry discharged into the second slurry discharge pipe 102 to the inside of the first slurry discharge pipe 101, so that the slurry can fill the outside of the internal hex bolt 7 and seal and protect the hex bolt 7.
[0021] Working principle: After tightening the hex bolt 7 into the grout outlet pipe 8, grouting is performed through the grouting channel connected to the concrete and the grouting hole 9. At this time, the concrete grout is injected into the grouting sleeve 5 through the grouting hole 9. As the amount of grout inside the grouting sleeve 5 gradually increases, the excess grout is transported to the inside of the second grouting pipe 102 through the grout outlet pipe 8. When the grouting channel connected to the concrete and the second grouting pipe 102 is filled, the grouting channel is plugged with a rubber stopper. As the grout is continuously added, the excess grout inside the second grouting pipe 102 is transported to the inside of the first grouting pipe 101 through the guide pipe 103. When the grouting channel connected to the concrete and the first grouting pipe 101 is filled, the grouting channel is plugged with a rubber stopper, thus completing the grouting operation of the sleeve.
Claims
1. A precast concrete component connection structure, comprising a first reinforcing bar (1) and a second reinforcing bar (2) embedded in the concrete, characterized in that: The outer side of the bottom end of the first reinforcing bar (1) is threaded with an inner thread sleeve (3). The bottom of the inner thread sleeve (3) is provided with a connecting sleeve (4) fitted on the outer side of the top end of the second reinforcing bar (2). The bottom of the connecting sleeve (4) is connected to a grouting sleeve (5) located on the outer side of the second reinforcing bar (2). The inner thread sleeve (3), the connecting sleeve (4) and the grouting sleeve (5) form a sleeve. The outer side of the connecting sleeve (4) is provided with a connecting pipe (6). The inner thread of the connecting pipe (6) is threaded with an internal hexagon bolt (7) located on the outer side of the second reinforcing bar (2). The outer side of the top end of the grouting sleeve (5) is connected to a grout outlet pipe (8). The bottom end of the grouting sleeve (5) is provided with a grouting hole (9) located directly below the grout outlet pipe (8). The outer sides of the connecting pipe (6) and the grout outlet pipe (8) are fixedly fitted with a grout discharge mechanism (10).
2. The prefabricated concrete component connection structure according to claim 1, characterized in that: A tapered chamfer (11) is provided between the connecting sleeve (4) and the grouting sleeve (5).
3. The prefabricated concrete component connection structure according to claim 1, characterized in that: The bottom outer side of the first reinforcing bar (1) is threaded with a nut (12) located above the inner thread sleeve (3).
4. The prefabricated concrete component connection structure according to claim 1, characterized in that: The slurry discharge mechanism (10) includes a first slurry discharge pipe (101) fixedly sleeved on the outside of the connecting pipe (6) and a second slurry discharge pipe (102) fixedly sleeved on the outside of the slurry outlet pipe (8), and a guide pipe (103) is connected between the first slurry discharge pipe (101) and the second slurry discharge pipe (102).