Reinforced concrete structure unit connecting node

Abstract

The utility model provides a reinforced concrete structure unit connecting node, which is suitable for the field of building structures and is a reinforced concrete fabricated building taking a standard structure unit as an assembly unit. According to the technical scheme, according to the assembly type connecting joint capable of achieving connection in the up-down direction, the left-right direction and the front-back direction at the same time, connecting pieces are made of metal, the connecting pieces arranged on the corners and the top faces of structural units are upper connecting pieces, the connecting pieces arranged at the bottoms of the structural units are lower connecting pieces, and vertical connection is achieved through secondary grouting of the upper connecting pieces, the lower connecting pieces and cavities between the upper connecting pieces and the lower connecting pieces; horizontal connection is achieved through buckling between the upper connecting piece and the lower connecting piece and bolted connection between the upper connecting piece and the lower connecting piece and the specially-made plate. Due to the special design of vertical connection, the upper connecting piece can be used as a hanging nail during installation and is matched with a duckbilled lifting appliance to realize lifting; various accessory components (handrails and cornices) and decorative components except the structural units can be directly connected with the connecting pieces through bolts or welded to the connecting pieces.

Description

Technical Field

[0001] This invention applies to the field of building structures, specifically to prefabricated reinforced concrete buildings using standard structural units as assembly units. Background Technology

[0002] Prefabricated buildings can be divided into two directions based on the assembly units. One is to use structural components as assembly units, breaking down the building structure into basic units such as beams, slabs, and columns. These components are transported to the construction site and connected by local cast-in-place connections to form an integral structure. This form is currently the most common type of prefabricated reinforced concrete structure in China. The other form is to use standard structural units as assembly units, breaking down the building structure into standard structural units, such as a standard room, which contains vertical and horizontal components, forming a stable structural system. This type of structure often uses steel structures and has the advantages of being lightweight and easy to assemble.

[0003] In rural areas, there is a type of prefabricated reinforced concrete house called a "cement house." It uses reinforced concrete structural units as assembly units, with the main body constructed of reinforced concrete. It has a right-angled cavity structure with a closed perimeter, a covered top, and a hollow lower section. Openings for doors and windows can be added to the sides and top according to usage and assembly needs. However, due to a lack of systematic design, it suffers from numerous problems and shortcomings. For example, there is no connection between different structural units, leading to significant issues with overall integrity and earthquake resistance; the size of individual modules is strictly limited by transportation constraints; the lack of supporting design results in lower product quality; pipelines are not pre-installed; and users must handle the roof design and waterproofing themselves. The biggest problem with this type of structure is the lack of reliable connection between different reinforced concrete structural units. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated connection node that is easy to install, reliable in bearing force, and used for splicing between reinforced concrete structural units. The structural unit is made of reinforced concrete, with right-angled hollow structures at all corners. The wall thickness of the structural unit is greater than the width of the connecting piece in the corresponding direction, and openings are provided around it as needed.

[0005] This invention is achieved through the following measures: a prefabricated connection node that can simultaneously achieve connections in the vertical, horizontal, and front-back directions, characterized in that the connectors are made of metal and are located at the corners of the structural unit. The top one is the upper connector and the bottom one is the lower connector. Vertical connections are achieved through secondary grouting of the upper connector, the lower connector, and the cavity between them. Horizontal connections are achieved through the fastening between the upper connector and the lower connector and bolt connection with a special plate.

[0006] The upper connector is a hollow component with a single-sided opening on the upper surface. A connecting and adjusting steel bar is installed on its horizontal contact surface with the concrete. One end of the steel bar is welded to the connector, and the other end is threaded. It connects to the structural unit steel bar through a sleeve, and precise positioning is achieved by rotating the sleeve. The vertical connecting and adjusting steel bar extends upward into the connector and protrudes from the upper surface (the topmost structural unit, flush with the upper surface). The lower end is threaded and connects to the structural unit steel bar through a sleeve, and precise vertical positioning is achieved by rotating the sleeve. The upper end is made into a cone to form a special lifting nail, which can be used as a hook during the lifting stage when used with a duckbill lifting device. After the upper structural unit is installed, the internal cavity is filled with grout to achieve a permanent vertical connection.

[0007] The lower connector is a hollow metal component with a single-sided opening on its lower surface. Two of its sides protrude downwards and engage with the upper connector. A connecting and adjusting steel bar is installed on its horizontal contact surface with the concrete. One end of the steel bar is welded to the connector, and the other end is threaded. It is connected to the structural unit steel bar through a sleeve, and precise positioning is achieved by rotating the sleeve. The lower end of the vertical connecting and adjusting steel bar is welded to the connector, and the upper end is threaded. It is connected to the structural unit steel bar through a sleeve, and precise vertical positioning is achieved by rotating the sleeve. A grouting pipe and an overflow pipe are installed on the side wall. One end of the pipe is connected to the connector, and the other end leads to the inner wall of the structural unit. The lower elevation is the grouting pipe, and the higher elevation is the overflow pipe.

[0008] The openings of the grouting pipe and overflow pipe of the lower connector are both located at the lower part of the inner corner of the structural unit.

[0009] The special plates are made of metal and are divided into T-type and cross-type according to the number of connecting structural units. The cross-type is further divided into two types according to the number of connecting structural units. The bolt holes of the special plates are elongated to facilitate the adjustment of dimensional errors caused by installation.

[0010] Compared with existing technologies, the advantages of this node are as follows: Connectors are pre-embedded during the prefabrication of structural units, requiring only bolt connections and grouting during on-site installation, all within the upper or internal space of the structural unit. Simultaneous connection and force transmission in all directions (up, down, left, right, front, and back) of the structural unit is possible; the special design of the vertical connection allows the upper connectors to also function as lifting nails during installation, enabling efficient hoisting in conjunction with duckbill lifting devices. After connection, each structural unit is tightly joined with no external protrusions, allowing for arbitrary combinations and connections between units. The connectors are made of metal, and various auxiliary components (railings, eaves) and decorative components outside the structural unit can be directly bolted or welded to the connectors. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the upper connector;

[0012] Figure 2 is a schematic diagram of the lower connector;

[0013] Figure 3 is a schematic diagram of the specially made sheet metal;

[0014] Figure 4 is a schematic diagram of the splicing node of two structural units;

[0015] Figure 5 is a schematic diagram of the splicing node of the three structural units;

[0016] Figure 6 is a schematic diagram of the splicing node of the four structural units;

[0017] Figure 7 is a schematic diagram of the splicing node of the eight structural units;

[0018] Figure 8 is a schematic diagram of the structural unit;

[0019] The reference numerals in the attached drawings are as follows: 1. Upper connector; 1a. Connecting and adjusting steel bar 1; 1b. Connecting and adjusting steel bar 2; 1c. Threaded sleeve 1; 1d. Threaded sleeve 2; 2. Lower connector; 2a. Connecting and adjusting steel bar 3; 2b. Threaded sleeve 3; 2c. Grouting pipe; 2d. Overflow pipe; 3. Special plate; 4. Bolt. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0021] The upper connector 1 is a single-sided open cavity component. A connecting and adjusting steel bar 1a is set on its horizontal contact surface with the concrete. One end of the steel bar is welded to the connector, and the other end is threaded. It is connected to the structural unit steel bar through a threaded sleeve 1c, and precise positioning is achieved by rotating the threaded sleeve 1c. The vertical connecting and adjusting steel bar 1b extends into the connector and protrudes from the upper surface (the top structural unit, flush with the upper surface). The lower end is threaded and is connected to the structural unit steel bar through a threaded sleeve 1d. Vertical precise positioning is achieved by rotating the threaded sleeve 1d. The upper end is made into a cone shape to form a special lifting nail, which is used as a lifting hook in conjunction with a special duckbill lifting tool during the lifting stage.

[0022] The lower connector 2 is inverted, with two protruding sides that engage with the upper connector 1. A connecting and adjusting steel bar 2a is installed horizontally on its concrete contact surface. One end of the steel bar is welded to the connector, and the other end is threaded, connecting to the structural unit steel bar via a threaded sleeve 2b. Precise positioning is achieved by rotating the threaded sleeve 2b. The lower end of the vertical connecting and adjusting steel bar is welded to the connector, and the upper end is threaded, connecting to the structural unit steel bar via a threaded sleeve 2b. Precise vertical positioning is achieved by rotating the threaded sleeve 2b. A grouting pipe 2c and an overflow pipe 2d are installed on the side wall. One end of each pipe connects to the connector, and the other end extends to the inner wall of the structural unit. The lower-elevation pipe is grouting pipe 2c, and the higher-elevation pipe is overflow pipe 2d. High-strength grout is injected into the internal cavity through grouting pipe 2c until the grout flows out of overflow pipe 2d, achieving a permanent vertical connection.

[0023] Example 1:

[0024] Referring to Figures 1-4 and Figure 8, a reinforced concrete structural unit connection node includes an upper connector 1, a lower connector 2, a specially made plate 3, and bolts 4. This node enables vertical and horizontal connections between two structural units, respectively.

[0025] The two units are vertically connected without special plate 3, while the two units are horizontally connected with special plate 3 in the form of a T-shape. After the two structural units are in place, the horizontal connection can be achieved by installing special plate 3 and bolts 4.

[0026] Example 2:

[0027] Referring to Figures 1-3, 5, and 8, a reinforced concrete structural unit connection node includes an upper connector 1, a lower connector 2, a specially made plate 3, and bolts 4. These components respectively achieve vertical and horizontal connections between three structural units.

[0028] The three structural units are vertically connected by a special plate 3 in a T-shape, and horizontally connected by a special plate 3 in a cross shape. After the three structural units are in place, the horizontal connection can be achieved by installing the special plate 3 and bolts 4.

[0029] Example 3:

[0030] Referring to Figures 1-3, 6, and 8, a reinforced concrete structural unit connection node includes an upper connector 1, a lower connector 2, a specially made plate 3, and bolts 4. These components respectively achieve vertical and horizontal connections between four structural units.

[0031] The four structural units are vertically connected by a special plate 3 in a T-shape, and horizontally connected by a special plate 3 in a cross shape. After the four structural units are in place, the horizontal connection can be achieved by installing the special plate 3 and bolts 4.

[0032] Example 4:

[0033] Referring to Figures 1-3, 7, and 8, a reinforced concrete structural unit connection node includes an upper connector 1, a lower connector 2, a specially made plate 3, and bolts 4. This achieves vertical and horizontal connections between eight structural units.

[0034] The eight structural units are connected by a special plate 3 in a cross shape. After the eight structural units are in place, they can be connected horizontally by installing the special plate 3 and bolts 4.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this solution can be combined with each other.

[0036] The aforementioned nodes are not limited to reinforced concrete structural units such as "cement houses," but can also be splices between various other structures or components.

[0037] In the description of this invention, it should be noted that the terms "up and down", "left and right", "front and back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific way. Therefore, they should not be construed as limiting this invention.

[0038] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. The above description is not intended to limit the invention, and the invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the invention should also be within the protection scope of the invention.

Claims

1. A reinforced concrete structural unit connection node, characterized in that, The prefabricated connection node can simultaneously achieve connection in all directions, including up and down, left and right, and front and back. The connectors are made of metal and are located at the corners of the structural unit. The top one is the upper connector (1) and the bottom one is the lower connector (2). Vertical connection is achieved by secondary grouting of the upper connector (1), the lower connector (2) and the cavity between them. Horizontal connection is achieved by fastening between the upper connector (1) and the lower connector (2) and connecting with the special plate (3) and bolts (4).

2. The reinforced concrete structural unit connection node according to claim 1, characterized in that, The structural units are made of reinforced concrete, with right-angled hollow structures at all corners.

3. The reinforced concrete structural unit connection node according to claim 1, characterized in that, The wall thickness of the structural unit is greater than the width of the connector in the corresponding direction, and the openings on all four sides are set as needed.

4. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The upper connector (1) is a hollow metal component with a single-sided opening on the upper surface.

5. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The upper connector (1) has a horizontal connecting and adjusting steel bar 1 (1a) in contact with the concrete surface. One end of the steel bar is welded to the connector, and the other end is threaded. It is connected to the structural unit steel bar through the threaded sleeve 1 (1c) and is precisely positioned by rotating the threaded sleeve 1 (1c). The vertical connecting and adjusting steel bar 2 (1b) extends upward into the connector and protrudes from the upper surface. The lower end is threaded and is connected to the structural unit steel bar through the threaded sleeve 2 (1d). It is precisely positioned vertically by rotating the threaded sleeve 2 (1d). After the upper structural unit is installed, the internal cavity is filled with grout to achieve a permanent vertical connection.

6. A reinforced concrete structural unit connection node according to claim 1, characterized in that, Vertically connect the adjusting steel bar 2 (1b), and make the upper end into a cone to form a special lifting nail, which is used in conjunction with the duckbill lifting tool as a lifting hook during the lifting stage.

7. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The lower connector (2) is a hollow metal component with a single opening on the lower surface.

8. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The lower connector (2) has two protruding sides that engage with the upper connector (1). A connecting and adjusting steel bar 3 (2a) is installed on the horizontal contact surface with the concrete. One end of the steel bar is welded to the connector, and the other end is threaded. It is connected to the structural unit steel bar through the threaded sleeve 3 (2b) and is precisely positioned by rotating the threaded sleeve 3 (2b). The lower end of the vertical connecting and adjusting steel bar 3 (2a) is welded to the connector, and the upper end is threaded. It is connected to the structural unit steel bar through the threaded sleeve 3 (2b) and is precisely positioned vertically by rotating the threaded sleeve 3 (2b). A grouting pipe (2c) and an overflow pipe (2d) are installed on the side wall. One end of the pipe is connected to the connector, and the other end is connected to the inner wall of the structural unit. The lower one is the grouting pipe (2c), and the higher one is the overflow pipe (2d).

9. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The openings of the grouting pipe (2c) and overflow pipe (2d) of the lower connector (2) are both located at the lower part of the inner corner of the structural unit.

10. A reinforced concrete structural unit connection node according to claim 1, characterized in that, The special plate (3) is made of metal and is divided into T-type and cross-type according to the number of connecting structural units. The cross-type is further divided into two types according to the number of connecting structural units. The bolt holes of the special plate (3) are long strips, which facilitates the adjustment of dimensional errors caused by installation.

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