A precast concrete element reinforcing connector

Abstract

The utility model relates to a prefabricated concrete component reinforcing bar connector, the bottom end of upper prefabricated component respectively preburies first connecting reinforcing bar, and the connecting end of first connecting reinforcing bar sets straight thread lengthening filament head, and still preburies third connecting reinforcing bar in upper prefabricated component, and third connecting reinforcing bar is set up grouting sleeve, and grouting sleeve also is prebured in upper prefabricated component, and the top end of lower prefabricated component respectively preburies second connecting reinforcing bar, and the connecting end of second connecting reinforcing bar sets straight thread standard length filament head, and still preburies fourth connecting reinforcing bar in lower prefabricated component, and first connecting reinforcing bar is fixedly connected with second connecting reinforcing bar through reinforcing bar connector, and is used for the assembly connection of upper prefabricated component and lower prefabricated component, and third connecting reinforcing bar is connected with fourth connecting reinforcing bar through grouting sleeve, and grouting sleeve is through grouting operation, is used for joint reinforcing bar connection, and the present application solves the problem of the connection when the end gap size of the fixed reinforcing bar connection and the connecting reinforcing bar of upper and lower components is inconsistent.

Description

Technical Field

[0001] This utility model relates to a rebar connector for precast concrete components. Background Technology

[0002] As the global construction industry actively moves towards sustainable and efficient development models, precast concrete construction, as an innovative building form, is gradually becoming a focus of the industry. This construction method, with its unique process of prefabricating components in a factory and then transporting them to the construction site for assembly, exhibits many advantages that traditional construction methods cannot match. It significantly shortens the construction cycle, substantially improves construction efficiency, and can meet societal demands for buildings more quickly. Simultaneously, because components are produced in standardized factories, quality control is more stringent, effectively ensuring the overall quality of the building. In terms of environmental protection, it reduces on-site wet work, lowers construction waste generation, and reduces pollution to the surrounding environment, aligning with the concept of sustainable development.

[0003] In precast concrete buildings, the importance of steel reinforcement connections is self-evident, as they are a core element ensuring the integrity and stability of the structure. Steel reinforcement is like the "skeleton" of a building, and connection technology is the crucial link that firmly connects these "skeletons." The quality of steel reinforcement connections directly affects whether the building structure can maintain its integrity and stability under various complex working conditions, such as earthquakes, wind loads, and other natural disasters, thereby protecting the lives and property of users. From a construction perspective, efficient and reliable steel reinforcement connection technology can accelerate construction progress, reduce uncertainties and rework risks during construction, and lower construction costs.

[0004] Traditional mechanical connection technology for reinforcing bars uses straight threaded sleeve connections. However, during the hoisting and connection of components, the connecting reinforcing bars of the upper and lower precast components are in a fixed state and cannot rotate. Furthermore, due to the large number of connecting reinforcing bars in the module, deviations in the position of the reinforcing bars during pre-embedding, and inconsistent end gaps between each pair of connecting reinforcing bars in the upper and lower components, the use of traditional straight threaded sleeve products is insufficient for completing the node reinforcing bar connection tasks in precast concrete buildings. Utility Model Content

[0005] This invention provides a rebar connector for precast concrete components, solving the problem of rebar connection when the pre-embedded fixed rebars in the components are connected and the end gap dimensions of each pair of connecting rebars in the upper and lower components are inconsistent. It also effectively improves the load-bearing capacity and stability of the joint, increases construction efficiency, reduces construction costs, and effectively reduces the skill requirements and operational risks. It significantly simplifies the rebar positioning process in the precast component production stage, reduces the difficulty of component production, shortens the production cycle, and improves production efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A precast concrete component rebar connector, characterized in that: first connecting rebars are pre-embedded at the four corners of the bottom end of the upper precast component, the connecting ends of the first connecting rebars are provided with straight threaded extended threads, a third connecting rebar is also pre-embedded in the upper precast component, a grouting sleeve is sleeved on the third connecting rebar, and the grouting sleeve is also pre-embedded in the upper precast component.

[0008] Second connecting steel bars are pre-embedded at the top four corners of the lower precast component. The connecting ends of the second connecting steel bars are provided with straight thread standard length threads. A fourth connecting steel bar is also pre-embedded in the lower precast component.

[0009] The first connecting steel bar is fixedly connected to the second connecting steel bar through a steel bar connector, so as to allow the upper precast component and the lower precast component to be assembled and connected. The third connecting steel bar is connected to the fourth connecting steel bar through the grouting sleeve. The grouting sleeve is used for node steel bar connection through grouting operation.

[0010] The rebar connector includes a convex sleeve, a concave sleeve, a connecting sleeve, and a locking ring. The convex sleeve and the locking ring are connected to the extended straight thread end by threads. The connecting sleeve is fitted onto the convex sleeve. The concave sleeve is connected to the standard length straight thread end by threads.

[0011] The contact end of the convex sleeve is provided with a tightening boss and a front convex ring, the contact end of the concave sleeve is provided with a groove, and an annular raised platform is provided in the groove. The tail end of the connecting sleeve is provided with an annular tensioning platform. The convex sleeve is rotated so that the groove is inserted into the front convex ring. The annular raised platform is used to tighten the end of the second connecting steel bar, which can eliminate the gap between the steel bar and the threaded connection of the concave sleeve. The end face of the tightening boss and the end face of the concave sleeve are in contact and tightened with each other. The connecting sleeve is fixed to the concave sleeve by thread. The annular tensioning platform and the tightening boss are in contact and tightened with each other. The locking ring is rotated to lock the convex sleeve and the concave sleeve.

[0012] The precast concrete component steel bar connector, wherein: the upper precast component is provided with grouting holes and grout discharge holes, which correspond to the holes on the grouting sleeve; the upper precast component is also provided with vent holes, the vent holes being positioned higher than the grout discharge holes.

[0013] The precast concrete component rebar connector, wherein the length of the extended straight thread is greater than the standard length of the straight thread.

[0014] The precast concrete component rebar connector, wherein: the inner hole of the convex sleeve is divided into two ends, one end is an internal thread and the other end is a smooth hole, the diameter of the smooth hole is greater than or equal to the major diameter of the internal thread, and the tightening boss is disposed on the side close to the smooth hole.

[0015] The precast concrete component rebar connector, wherein: the inner hole of the concave sleeve includes a large-size hole, a medium-size hole and a small-size hole respectively, the large-size hole and the small-size hole are smooth holes, the large-size hole and the small-size hole are connected, the medium-size hole is provided with internal thread, and the medium-size hole is connected to the standard length thread end of the straight thread.

[0016] The precast concrete component rebar connector, wherein: the cross-sectional shape of the concave sleeve and the connecting sleeve is circular or polygonal, and is consistent with the shape of the tightening wrench.

[0017] The beneficial effects of this invention are as follows: It combines mechanical connection and grouting connection technologies to achieve efficient and reliable connection of steel reinforcement in concrete columns and walls. Due to the novel and reasonable structure of the steel connector in this invention, the end face of the convex sleeve and the end face of the concave sleeve contact and tighten together, forming a rigid pressure-bearing interface, effectively improving the load-bearing capacity and stability of the joint. The steel connector is placed at key stress points at the corners of concrete components, while grouting sleeves are placed at other locations. After the precast component is hoisted into place, the mechanical connection of the steel connectors at the corners is completed first. Their excellent compressive strength can immediately form a stable support system. After the steel connector connection is completed, the component no longer needs to occupy hoisting equipment, nor does it require additional temporary support structures. This process can shorten the hoisting equipment occupation time, significantly reducing construction equipment rental costs and on-site management difficulties. Subsequent grouting operations are performed on the grouting sleeves, resulting in high grouting connection efficiency, low cost, and effectively improving construction progress. This construction process overcomes the disadvantages of the simple steel reinforcement grouting connection process requiring a 24-hour waiting period before disturbing construction and the disadvantages of the long operation time and high cost of the simple steel reinforcement mechanical connection. In terms of operation, the rebar connector is simple to use, requiring only the turning of the components to complete the connection without the need for complex mechanical equipment. Construction personnel can quickly master the process after training, effectively reducing the skill requirements and operational risks. Simultaneously, the structural fit between the front boss of the convex sleeve and the groove of the concave sleeve allows for forced alignment of rebars with a certain offset between the axes of the upper and lower components. Compared to traditional connection methods, this increases the allowable tolerance for rebar positioning, significantly simplifying the rebar positioning process in precast component production, reducing production difficulty, shortening the production cycle, and improving production efficiency. This strongly promotes the industrialization of prefabricated concrete structure production. Attached Figure Description

[0018] Figure 1 This is a structural diagram showing the separation state between the upper and lower precast components.

[0019] Figure 2 This is a perspective structural diagram showing the separation between the upper and lower precast components.

[0020] Figure 3 This is a structural diagram showing the connection status between the upper and lower precast components.

[0021] Figure 4 This is a structural diagram showing the rebar connector in its separated state.

[0022] Figure 5 This is a structural diagram showing the locking state of the rebar connector.

[0023] Explanation of reference numerals in the attached drawings: 1-Upper precast component; 2-Lower precast component; 3-First connecting reinforcing bar; 31-Extended straight thread end; 4-Second connecting reinforcing bar; 41-Standard length straight thread end; 5-Third connecting reinforcing bar; 6-Fourth connecting reinforcing bar; 7-Grouting hole; 8-Grouting hole; 9-Reinforcing bar connector; 91-Protruding sleeve; 911-Tightening boss; 912-Front end protruding ring; 92-Concave sleeve; 921-Annular platform; 922-Groove; 93-Connecting sleeve; 931-Annular tensioning platform; 94-Locking ring; 10-Vent hole; 11-Grouting sleeve. Detailed Implementation

[0024] like Figures 1 to 5 As shown, a precast concrete component rebar connector is characterized in that: first connecting rebars 3 are pre-embedded at the four corners of the bottom end of the upper precast component 1, and the connecting ends of the first connecting rebars 3 are provided with straight threaded extended threads 31; a third connecting rebar 5 is also pre-embedded in the upper precast component 1, and a grouting sleeve 11 is sleeved on the third connecting rebar 5. The grouting sleeve 11 is also pre-embedded in the upper precast component 1; grouting holes 7 and grout discharge holes 8 are provided on the upper precast component 1, and correspond to the holes on the grouting sleeve 11; an vent hole 10 is also provided on the upper precast component 1, and the position of the vent hole 10 is higher than that of the grout discharge hole 8.

[0025] The top four corners of the lower precast component 2 are pre-embedded with second connecting steel bars 4. The connecting end of the second connecting steel bar 4 is provided with a straight thread standard length thread end 41. The lower precast component 2 is also pre-embedded with a fourth connecting steel bar 6. The length of the straight thread extended thread end 31 is greater than the straight thread standard length thread end 41.

[0026] The first connecting steel bar 3 is fixedly connected to the second connecting steel bar 4 through the steel bar connector 9, so as to allow the upper precast component 1 and the lower precast component 2 to be assembled and connected. The third connecting steel bar 5 is connected to the fourth connecting steel bar 6 through the grouting sleeve 11. The grouting sleeve 11 is used for node steel bar connection through grouting operation.

[0027] The rebar connector 9 includes a male sleeve 91, a female sleeve 92, a connecting sleeve 93, and a locking ring 94. The male sleeve 91 and the locking ring 94 are connected to the extended straight thread end 31 by threads. The connecting sleeve 93 is sleeved on the male sleeve 91. The female sleeve 92 is connected to the standard length straight thread end 41 by threads. The cross-sectional shape of the female sleeve 92 and the connecting sleeve 93 is circular or polygonal and is consistent with the shape of the tightening wrench.

[0028] The contact end of the sleeve 91 is provided with a clamping boss 911 and a front end protruding ring 912. The inner hole of the sleeve 91 is divided into two ends, one end is an internal thread and the other end is a smooth hole. The diameter of the smooth hole is greater than or equal to the major diameter of the internal thread. The clamping boss 911 is located on the side close to the smooth hole.

[0029] The contact end of the concave sleeve 92 is provided with a groove 922, and an annular platform 921 is provided in the groove 922. The tail end of the connecting sleeve 93 is provided with an annular tensioning platform 931. The convex sleeve 91 is rotated so that the groove 922 is inserted into the front convex ring 912. The annular platform 921 is used to tighten the end of the second connecting steel bar 4, which can eliminate the gap between the steel bar and the threaded connection of the concave sleeve 92. The end face of the tightening platform 911 is in contact with the end face of the concave sleeve 92 and is tightened. The inner hole of the concave sleeve 92 includes a large-size hole, a medium-size hole and a small-size hole. The large-size hole and the small-size hole are smooth holes. The large-size hole and the small-size hole are connected. The medium-size hole is provided with an internal thread. The medium-size hole is connected to the standard length thread end 41 of the straight thread.

[0030] The connecting sleeve 93 is connected and fixed to the concave sleeve 92 by threads. The annular tensioning table 931 and the top tightening boss 911 contact and tighten each other. The locking ring 94 is rotated to lock the boss 91 and the concave sleeve 92.

[0031] A method for connecting reinforcing bars in precast concrete components, characterized by comprising the following steps:

[0032] Step 1: During on-site installation, first lift the upper precast component 1 and move it above the lower precast component 2. Place a shim on the lower precast component 2 and slowly move the upper precast component 1 downwards so that the cavity of the grouting sleeve 11 embedded in the upper precast component 1 is aligned with the fourth connecting steel bar 6 of the lower precast component 2. Finally, the fourth connecting steel bar 6 is inserted into the grouting sleeve 11, and the upper precast component 1 falls onto the shim.

[0033] Step 2: Adjust the upper prefabricated component 1 to align the position of the rebar connector 9. The rebar connector 9 includes a convex sleeve 91, a concave sleeve 92, a connecting sleeve 93, and a locking ring 94. The convex sleeve 91 and the locking ring 94 are connected to the extended straight thread end 31 of the first connecting rebar 3 by threads. The connecting sleeve 93 is sleeved on the convex sleeve 91. The concave sleeve 92 is connected to the standard length straight thread end 41 of the second connecting rebar 4 by threads. Rotating the convex sleeve 91 allows the front convex ring 912 to be inserted into the groove 922. The annular platform 921 is used for the end of the second connecting rebar 4 to be pressed against, which can eliminate the gap between the rebar and the threaded connection of the concave sleeve 92, reduce the residual deformation, and the end face of the pressing platform 911 and the end face of the concave sleeve 92 contact and press against each other.

[0034] Step 3: Rotate the connecting sleeve 93 and connect and fix it to the concave sleeve 92 by thread, so that the annular tensioning table 931 and the top tightening boss 911 come into contact with each other and tighten.

[0035] Step 4: Rotate the locking ring 94 to further lock the convex sleeve 91 and the concave sleeve 92;

[0036] Step 5: Perform appearance quality and tightening torque inspection on the rebar connector 9 as required. Once the rebar connector 9 is assembled, the hoisting equipment can be removed from the site. Perform grouting operation on the grouting sleeve 11. Finally, construct the cofferdam, pour concrete, and cure the rebar to complete the node rebar connection.

[0037] The above embodiments are merely illustrative examples of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art can make simple changes or substitutions based on the above embodiments without departing from the technical concept of this utility model, but these changes will still fall within the scope of protection of this utility model.

Claims

1. A precast concrete component reinforcement connector, characterized in that: First connecting steel bars (3) are pre-embedded at the four corners of the bottom end of the upper precast component (1). The connecting end of the first connecting steel bar (3) is provided with a straight thread extended thread (31). A third connecting steel bar (5) is also pre-embedded in the upper precast component (1). A grouting sleeve (11) is sleeved on the third connecting steel bar (5). The grouting sleeve (11) is also pre-embedded in the upper precast component (1). The top four corners of the lower precast component (2) are respectively embedded with second connecting steel bars (4), and the connecting end of the second connecting steel bar (4) is provided with a straight thread standard length thread head (41). The lower precast component (2) is also embedded with a fourth connecting steel bar (6). The first connecting steel bar (3) is fixedly connected to the second connecting steel bar (4) through the steel bar connector (9) for the upper precast component (1) and the lower precast component (2) to be assembled and connected. The third connecting steel bar (5) is connected to the fourth connecting steel bar (6) through the grouting sleeve (11). The grouting sleeve (11) is used for the connection of node steel bars through grouting operation. The steel bar connector (9) includes a convex sleeve (91), a concave sleeve (92), a connecting sleeve (93), and a locking ring (94). The convex sleeve (91) and the locking ring (94) are connected to the extended straight thread end (31) by threads. The connecting sleeve (93) is sleeved on the convex sleeve (91). The concave sleeve (92) is connected to the standard length straight thread end (41) by threads. The contact end of the convex sleeve (91) is provided with a tightening boss (911) and a front end convex ring (912). The contact end of the concave sleeve (92) is provided with a groove (922). An annular platform (921) is provided in the groove (922). An annular tensioning platform (931) is provided at the tail end of the connecting sleeve (93). The convex sleeve (91) is rotated so that the groove (922) is inserted into the front end convex ring (912). The annular platform (921) provides space for the second connecting steel bar. (4) The end is tightened to eliminate the gap between the reinforcing bar and the threaded connection of the concave sleeve (92). The end face of the tightening boss (911) and the end face of the concave sleeve (92) are in contact and tightened. The connecting sleeve (93) is connected and fixed to the concave sleeve (92) by threads. The annular tensioning table (931) and the tightening boss (911) are in contact and tightened. The locking ring (94) is rotated to lock the boss (91) and the concave sleeve (92).

2. The precast concrete component rebar connector as described in claim 1, characterized in that: The upper precast component (1) is provided with grouting holes (7) and grout discharge holes (8), which correspond to the holes on the grouting sleeve (11). The upper precast component (1) is also provided with vent holes (10), and the position of the vent holes (10) is higher than that of the grout discharge holes (8).

3. A precast concrete component reinforcement connector as described in claim 1, characterized in that: The length of the extended straight thread end (31) is greater than that of the standard length straight thread end (41).

4. A precast concrete component reinforcement connector as described in claim 1, characterized in that: The inner hole of the bushing (91) is divided into two ends, one end is an internal thread and the other end is a smooth hole. The diameter of the smooth hole is greater than or equal to the major diameter of the internal thread. The clamping boss (911) is located on the side close to the smooth hole.

5. A precast concrete component reinforcement connector as described in claim 1, characterized in that: The inner hole of the concave sleeve (92) includes a large-size hole, a medium-size hole and a small-size hole. The large-size hole and the small-size hole are smooth holes. The large-size hole is connected to the small-size hole. The medium-size hole is provided with an internal thread. The medium-size hole is connected to the standard length thread end (41) of the straight thread.

6. A precast concrete component reinforcement connector as described in claim 1, characterized in that: The cross-sectional shape of the concave sleeve (92) and the connecting sleeve (93) is circular or polygonal, and is consistent with the shape of the tightening wrench.

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