A longitudinal steel grouting connecting device

Abstract

The utility model provides a longitudinal reinforcing steel bar grouting connecting device belongs to the field of construction engineering science and technology. The existing reinforcing steel bar connecting horizontal and longitudinal deviation adaptability poor problem is solved. Longitudinal reinforcing steel bar grouting connecting device includes the plug, sleeve and overflow ring cover, sleeve lower extreme links with the plug, sleeve upper extreme links with overflow ring cover, the plug links with first reinforcing steel bar, the sleeve is sequentially provided with deviation adjusting section and anchoring section from below to above in, the sleeve internal grouting material, the sleeve inserts second reinforcing steel bar. It is mainly used for longitudinal reinforcing steel bar grouting connection.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering science and technology, and in particular relates to a longitudinal steel bar grouting connection device. Background Technology

[0002] Reinforced concrete engineering is a crucial component of concrete structures, and its quality, efficiency, and cost have received considerable attention. However, traditional rebar connection methods, such as lap splicing, welding, threaded connections, and grouting, suffer from problems including steel waste, low thread processing efficiency, low connection efficiency, and issues with construction and grouting quality. They also cannot achieve simultaneous connection of groups of rebars, failing to meet the demands of modern engineering construction. Existing rebar connection methods often employ a method of inserting the rebar first and then grouting. This method results in a small gap between the rebar and the sleeve, and is commonly used in precast concrete. However, for connections between multiple groups of rebars, the lack of concrete constraint after the rebar is tied into a cage leads to poor precision, and existing methods cannot accommodate deviations between multiple groups of rebars. Therefore, there is an urgent need to develop a highly efficient, reliable technology with strong deviation adaptability that can be used for connecting groups of longitudinal rebars. Utility Model Content

[0003] In view of this, the present invention aims to propose a longitudinal steel bar grouting connection device to solve the problem of poor adaptability to lateral and longitudinal deviations in existing steel bar connections.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a longitudinal rebar grouting connection device, comprising a plug, a sleeve, and an overflow ring, wherein the lower end of the sleeve is connected to the plug, the upper end of the sleeve is connected to the overflow ring, the plug is connected to a first rebar, a deviation adjustment section and an anchoring section are sequentially arranged from bottom to top inside the sleeve, grout is injected inside the sleeve, and a second rebar is inserted inside the sleeve.

[0005] Furthermore, the overflow ring is a conical structure, with the smaller diameter end of the conical structure connected to the sleeve.

[0006] Furthermore, the deviation adjustment section has a straight section structure.

[0007] Furthermore, the anchoring section is a series of continuous groove-like structures.

[0008] Furthermore, the insertion length of the second reinforcing bar is greater than the length of the anchorage section.

[0009] Furthermore, the overflow ring is connected to the inner or outer wall of the sleeve.

[0010] Furthermore, the first reinforcing bar has a threaded end, and the plug has an internal thread on its inner side, with the threaded end being screwed into the internal thread.

[0011] Furthermore, the plug and the sleeve are connected by threads.

[0012] This utility model also provides a connection method for a longitudinal rebar grouting connection device, specifically: a plug is pre-installed on one end of a sleeve to form a prefabricated joint assembly; the joint assembly is connected to the first rebar by a threaded connection, and a specified torque is applied; grout is injected into the sleeve to a predetermined elevation; while the grout is still fluid, the second rebar is inserted into the sleeve from top to bottom to the designed embedment depth; an overflow ring catches the grout overflowing from the sleeve when the second rebar is inserted; and the connection of the two rebars is achieved after the grout hardens.

[0013] Furthermore, the connection method is used for simultaneous connection of groups of reinforcing bars.

[0014] Compared with existing technologies, the beneficial effects of this utility model are: This utility model can solve the problem of axial and longitudinal offset when connecting groups of longitudinal steel bars, and realize the one-time positioning and rapid connection of multiple steel bars. The sleeve size of this utility model is larger than that of traditional connection joints. The grout is first poured into the sleeve, and then the steel bars are inserted. Due to the existence of axial and longitudinal deviations, some steel bars are inserted to the bottom, while others are not. Therefore, more grout needs to be poured to ensure sufficient anchorage length. The overflow ring is a channel for retaining excess grout, preventing grout from entering the steel cage and affecting the concrete.

[0015] The overflow ring forms a circumferential sealed channel during the reinforcement insertion stage, confining any grout that may overflow during reinforcement insertion within the connection device, ensuring a stable and complete connection without overflow or grout shortage; this device does not need to be removed after assembly. The deviation adjustment section can resolve errors caused by on-site reinforcement deformation without additional cutting or lengthening, increasing construction adaptability. Test results show that the load-bearing capacity and ductility of the hardened connection device meet the requirements of current national standards. While ensuring connection quality, it significantly shortens hoisting and alignment time, reduces labor and overall costs, and achieves multiple benefits of efficient construction, green operation, and reliable quality, fully meeting the dual requirements of modern concrete structures for rapid assembly and performance safety. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the longitudinal steel bar grouting connection device according to the present invention; Figure 2 This is a schematic diagram of the overflow ring connected to the outer wall of the sleeve according to the present invention.

[0017] In the picture: 1-First reinforcing bar, 2-Plug, 3-Threaded end, 4-Sleeve, 5-Grossure, 6-Second reinforcing bar, 7-Overflow ring, 8-Anchoring section, 9-Deviance adjustment section. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0019] See Figure 1-2 This embodiment describes a longitudinal rebar grouting connection device, which includes a plug 2, a sleeve 4, and an overflow ring 7. The lower end of the sleeve 4 is connected to the plug 2, and the upper end of the sleeve 4 is connected to the overflow ring 7. The plug 2 is connected to a first rebar 1. A deviation adjustment section 9 and an anchoring section 8 are arranged sequentially from bottom to top inside the sleeve 4. Grout 5 is injected into the sleeve 4, and a second rebar 6 is inserted into the sleeve 4.

[0020] This embodiment is a connection method for a longitudinal rebar grouting connection device. Specifically, the plug 2 is pre-installed on one end of the sleeve 4 to form a prefabricated joint assembly. The joint assembly is connected to the first rebar 1 by a threaded connection, and a specified torque is applied. Grout 5 is injected into the sleeve 4 to a predetermined elevation. While the grout 5 is still fluid, the second rebar 6 is inserted into the sleeve 4 from top to bottom to the designed embedding depth. The overflow ring 7 receives the grout 5 that overflows from the sleeve 4 when the second rebar 6 is inserted. After the grout 5 hardens, the connection between the two rebars is achieved.

[0021] This embodiment features an overflow ring 7 at the end of the sleeve 4, which is assembled on-site and requires no subsequent disassembly. Combined with the pre-installed plug 2 and deviation adjustment section 9, it simultaneously solves the axial and longitudinal offset problems during the butt jointing of grouped longitudinal reinforcing bars, enabling one-time positioning and rapid connection of multiple reinforcing bars. The overflow ring 7 forms a circumferential sealed channel during the bar insertion stage, confining the grout 5 within the device to ensure grouting density and prevent overflow contamination and grout shortage, significantly reducing rework and cleaning workload. The deviation adjustment section 9 eliminates on-site reinforcing bar length errors, eliminating the need for cutting or lengthening, thus enhancing construction adaptability. Comprehensive test data shows that the load-bearing capacity and ductility of the hardened connection device meet current national standards. While ensuring high-quality connections, it significantly shortens hoisting and positioning time, reduces on-site labor input and overall construction costs, achieving efficiency improvement, green construction, and cost savings. This provides a highly efficient and reliable new connection technology for reinforced concrete structures, better meeting the dual demands of modern engineering construction for rapid assembly and performance safety.

[0022] The overflow ring 7 described in this embodiment has a conical structure, with the smaller diameter end of the conical structure connected to the sleeve 4. Sufficient space is provided to retain the grout 5 overflowing from the sleeve 4. The overflow ring 7 forms a circumferential sealed flow channel, guiding the upper second reinforcing bar 6 to automatically align along the deviation adjustment section 9 and insert to the designed depth without on-site cutting or lengthening. The overflow ring 7 prevents grout overflow and grout shortage. After the reinforcing bar insertion is completed, the overflow ring 7 is retained with the sleeve 4. The overflow ring 7 is connected to the inner or outer wall of the sleeve 4. Figure 1 The diagram shows the form in which the overflow ring 7 is connected to the inner wall of the sleeve 4. Figure 2 The diagram shows the connection between the overflow ring 7 and the outer wall of the sleeve 4. The appropriate connection method can be chosen based on the site conditions, offering strong adaptability.

[0023] The deviation adjustment section 9 described in this embodiment is a straight section structure. The deviation adjustment section 9 itself does not participate in the anchorage of the reinforcing bar. It is set up to ensure sufficient anchorage strength and adapt to the deviations of different reinforcing bars. Because of the deviation adjustment section 9, there is no need to cut or lengthen the reinforcing bar, thus solving the error caused by on-site reinforcing bar deformation and enhancing construction adaptability. The anchorage section 8 is a multi-continuous groove structure. The anchorage section 8 forms a mechanical engagement with the grout 5 through continuous wavy grooves, ensuring that the anchorage force is evenly distributed along the length of the reinforcing bar and avoiding stress concentration. After the grout 5 hardens, it is embedded inside the groove, forming a multi-tooth key effect, significantly improving the pull-out bearing capacity. The continuous groove structure allows the second reinforcing bar 6 to be finely adjusted in position during insertion. If it is skewed or not fully inserted, the grout can adaptively fill the groove gaps, ensuring the anchorage section is effective throughout. The continuous grooves form a smooth grout flow channel, which facilitates the natural filling of gaps by the grout 5 during insertion, reducing porosity and avoiding grouting blind spots. The insertion length of the second reinforcing bar 6 is greater than the length of the anchorage section 8, ensuring anchorage strength.

[0024] In this embodiment, the first reinforcing bar 1 has a threaded end 3 at its end, and the plug 2 has an internal thread on its inner side. The threaded end 3 is screwed into the internal thread, and the plug 2 is threadedly connected to the sleeve 4. Before leaving the factory, the plug 2 is pre-installed and reliably tightened to one end of the sleeve 4, forming a prefabricated joint assembly. An overflow ring 7, which is assembled on-site and does not require subsequent disassembly, is set at the other end of the sleeve 4. During construction, the prefabricated joint assembly is first connected to the threaded end 3 of the first reinforcing bar 1 by threading, and a specified torque is applied. Then, grout 5 is injected into the sleeve 4 to the predetermined elevation. While the grout 5 is still fluid, the second reinforcing bar 6 is inserted into the sleeve 4 from top to bottom to the designed embedment depth. The overflow ring 7 forms a circumferential sealing channel during the insertion stage, which can effectively confine the grout 5 inside the sleeve 4 and the overflow ring 7. After the grout has fully hardened, a reliable connection between the two reinforcing bars can be achieved.

[0025] The connection method described in this embodiment is used for simultaneous connection of grouped reinforcing bars. When used for component connection or reinforcing cage connection, sleeves 4 with pre-installed plugs 2 are screwed onto the ends of the longitudinal first reinforcing bars 1 of the lower structure and tightened to the designed torque; then, grout 5 is injected into the sleeves 4 from top to bottom to ensure that the cavity of the sleeves 4 is filled with grout 5. While the grout 5 is still in a flowing state, an overflow ring 7 is fitted onto the end of the sleeve 4 to form a circumferential sealed guide channel, guiding the second reinforcing bar 6 of the upper layer to automatically center along the deviation adjustment section 9 and insert to the designed depth without on-site cutting or lengthening; the overflow ring 7 can prevent grout overflow and grout shortage, and the overflow ring 7 is retained with the sleeve 4 after the reinforcing bar is inserted. After the grout 5 has initially set, the positioning fixture can be removed to proceed to the next process. Compared with connecting one bar at a time, the connection method described in this utility model significantly reduces hoisting and docking time, reduces on-site labor input, and eliminates the cleaning and rework caused by grout 5 overflow, achieving a comprehensive advantage of high efficiency, low pollution, and reliable quality.

[0026] The specific embodiments of this utility model disclosed above are merely illustrative of the present utility model. These specific embodiments do not exhaustively describe all details, nor do they limit the utility model to only the described embodiments. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A longitudinal steel bar grouting connection device, characterized in that: It includes a plug (2), a sleeve (4) and an overflow ring (7). The lower end of the sleeve (4) is connected to the plug (2), and the upper end of the sleeve (4) is connected to the overflow ring (7). The plug (2) is connected to the first reinforcing bar (1). The sleeve (4) is provided with a deviation adjustment section (9) and an anchoring section (8) from bottom to top. Grout (5) is injected into the sleeve (4). The second reinforcing bar (6) is inserted into the sleeve (4).

2. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The overflow ring (7) has a conical structure, and the small diameter end of the conical structure is connected to the sleeve (4).

3. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The deviation adjustment section (9) has a straight section structure.

4. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The anchoring section (8) is a series of continuous groove-shaped structures.

5. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The insertion length of the second reinforcing bar (6) is greater than the length of the anchorage section (8).

6. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The overflow ring (7) is connected to the inner or outer wall of the sleeve (4).

7. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The first reinforcing bar (1) is provided with a threaded end (3) at its end, and the plug (2) is provided with an internal thread on its inner side. The threaded end (3) is screwed into the internal thread.

8. The longitudinal steel bar grouting connection device according to claim 1, characterized in that: The plug (2) and the sleeve (4) are connected by threads.

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