A dry connection device for vertical joints of assembled composite walls

Abstract

The present invention provides a dry-type connection device for vertical seams of assembled composite walls, comprising a connection sleeve, which is horizontally buried at the end of a first wall, and the end of the connection sleeve is flush with the end of the first wall; a connection box body is horizontally buried at the end of a second wall, and the end of the connection box body is flush with the end of the second wall; a connection bolt is horizontally arranged between the connection sleeve and the connection box body, one end of the connection bolt is fixedly connected to the connection sleeve, and the other end is fixedly connected to the connection box body; the present invention embeds the connection box body at the end of the vertical seam of the wall, so that the connection box body has excellent bearing capacity, thereby realizing reliable connection of the vertical seams between adjacent walls; the vertical seam connection of the wall only needs to be connected with the connection bolt on a single side of the wall, thereby reducing damage to the wall; the connection device is concentratedly damaged under a strong earthquake, and is easy to assemble, install and repair later; it has the advantages of high precision, shortened construction period, and easy repair of nodes damaged after the earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of boundary connection of assembled composite walls, and in particular relates to a dry connection device for vertical seams of assembled composite walls. Background Art

[0002] Prefabricated buildings have the characteristics of standardized design, industrialized component production and mechanized construction. Prefabricated construction can greatly reduce on-site wet operations and the use of labor, and is the main development direction of future buildings. The key to prefabricated composite wall structures lies in the boundary connection technology between prefabricated components and between prefabricated components and cast-in-place and post-cast concrete, including the selection of connection joints and the structural design of connection nodes.

[0003] At present, the existing connection technology of prefabricated wall panels can be divided into wet connection and dry connection according to the construction method; among them, the dry connection methods with more engineering applications mainly include sleeve grouting connection, grout anchor connection and sleeve extrusion connection; most of the existing dry connection methods require on-site wet work or other on-site operations. Although it can ensure that its node performance is similar to that of cast-in-place concrete nodes, this type of connection form cannot fully utilize the advantages of rapid construction and installation of prefabricated concrete structures; on the other hand, traditional dry-connected concrete structures have the disadvantage of dispersed damage under strong earthquakes, which makes post-earthquake repair more difficult and is not conducive to rapid post-earthquake repair. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a dry connection device for vertical seams of assembled composite walls to solve the technical problems of low installation efficiency and great difficulty in post-earthquake repair of existing vertical seam dry connections.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a dry connection device for vertical seams of assembled composite walls, characterized in that the dry connection device is horizontally arranged between the vertical connection seams of two adjacent walls; the dry connection device comprises a connection sleeve, a connection box body and a connection bolt, the connection sleeve is horizontally buried at the end of a first wall, and the end of the connection sleeve is flush with the end of the first wall; the connection box body is horizontally buried at the end of a second wall, and the end of the connection box body is flush with the end of the second wall; the connection bolt is horizontally arranged between the connection sleeve and the connection box body, one end of the connection bolt is fixedly connected to the connection sleeve, and the other end is fixedly connected to the connection box body.

[0007] Furthermore, the connection box body includes a top plate, a bottom plate, a first end plate, a second end plate, a rear side plate and a hollow connection column; the top plate, the bottom plate, the first end plate, the second end plate and the rear side plate are enclosed to form a rectangular box body structure with an opening on one side, and the opening side of the rectangular box body structure is flush with the surface of the second wall;

[0008] The hollow connecting column is fixedly arranged on the second end plate, and the second end plate is arranged vertically on one side of the end close to the second wall; one end of the hollow connecting column is welded and fixed to the second end plate, and the other end is flush with the end of the second wall; the connecting bolt is horizontally passed through the hollow connecting column, one end of the connecting bolt is connected to the second end plate, and the other end is connected to the connecting sleeve.

[0009] Furthermore, a pad is provided between the connecting bolt and the second end plate.

[0010] Furthermore, a circular through hole is provided on the first end plate, and a rectangular through hole is provided on the second end plate; the circular through hole, the rectangular through hole hollow connecting column and the connecting sleeve are horizontally aligned and penetrated; the hollow connecting column is a rectangular frame structure, and the size of the hollow surface of the rectangular frame structure is consistent with the size of the rectangular through hole and matches the diameter of the connecting bolt; the size of the circular through hole is larger than the maximum diameter of the connecting bolt.

[0011] Furthermore, the rectangular box structure and the hollow connecting column are both welded by steel plates, and the steel plates have the same specifications.

[0012] Furthermore, it also includes a plurality of anchoring steel bars, which are evenly arranged horizontally on the outside of the connecting sleeve, one end of the anchoring steel bar is anchored in the first wall, and the other end is fixedly connected to the connecting sleeve.

[0013] Furthermore, a caulking material is provided in the vertical seam between the first wall and the second wall, and the caulking material is an EPS foam strip.

[0014] Furthermore, high-strength bolts are used as connecting bolts.

[0015] Furthermore, the first wall and the second wall both use prefabricated composite wall panels; the prefabricated composite wall panels include side rib columns, middle rib columns, rib beams, blocks and concrete outer layers, the side rib columns, middle rib columns and rib beams form a frame structure, the frame structure is filled with blocks, and the concrete outer layer is covered on the outside of the frame structure; the connecting sleeve and the connecting box are both horizontally arranged in the side rib columns, and are clamped between the longitudinal reinforcements of the side rib columns.

[0016] Furthermore, the dry connection device is arranged at the node between the side rib column and the rib beam.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a dry-type connection device for vertical seams of assembled composite walls. By pre-burying a connection box body at the end of the vertical seam of the wall, the connection box body has excellent bearing capacity, and the connection box body is fixedly connected to the connection sleeve by connecting bolts with relatively high bearing capacity. The overall bearing capacity of the connection device is relatively high, and reliable connection of the vertical seams between adjacent walls is achieved. The vertical seam connection of the wall only needs to be connected with connecting bolts on a single side of the wall, which reduces damage to the wall. The connection device is concentratedly damaged under strong earthquakes and is easy to assemble, install and repair later. It has the advantages of high precision, shortened construction period, easy repair of damaged nodes after an earthquake, and convenient installation in remote areas.

[0019] Furthermore, a connecting box is formed by assembling a rectangular box structure and a hollow connecting column, and the end of the hollow connecting column is flush with the end of the wall, ensuring that the longitudinal reinforcement of the wall can pass through both sides of the hollow rectangular column, thereby ensuring the continuity of the longitudinal reinforcement in the wall, and allowing the connecting box to be nested in the wall. The longitudinal reinforcement in the wall acts on the pin of the box, giving it a strong pull-out resistance. By setting a hollow connecting column, a larger up and down range of movement is provided for the connecting bolts, which effectively improves the docking efficiency between the connecting bolts and the connecting sleeves, and greatly improves the efficiency of vertical seam splicing of the wall panels.

[0020] Furthermore, by arranging a pad between the connecting bolt and the second end plate, the force-bearing area between the connecting bolt and the connecting box body is effectively increased, thereby preventing the connecting bolt from being pulled off due to excessive force.

[0021] Furthermore, by opening a circular through hole on the first end plate, it is convenient to place the connecting bolt in the connecting box body, thereby reducing the design size of the connecting box body and avoiding damage to the wall due to the excessive size of the connecting box body caused by not opening a hole; after the connecting bolt is placed in the connecting box body, the circular through hole is sealed with a plate, thereby avoiding concrete from entering the connecting box body when pouring the wall panel.

[0022] Furthermore, the rectangular box structure and the hollow connecting column are made of steel plates of the same specification. After being welded into a whole, the force is more balanced, preventing the box from being torn due to uneven force.

[0023] Furthermore, by evenly arranging anchor steel bars on the outside of the connecting sleeve, the tensile strength of the connecting sleeve is effectively improved, the secure connection between the connecting sleeve and the wall is enhanced, and the dry connection device is ensured to reliably transfer the stress between the walls.

[0024] Furthermore, the vertical joints of the wall are filled with caulking materials to make the wall surface an integral whole, which is convenient for later decoration and enhances the thermal insulation, heat insulation and sound insulation properties of the wall.

[0025] Furthermore, by clamping the connecting sleeve and the connecting box body between the longitudinal ribs of the side rib columns and utilizing the restraining effect of the longitudinal ribs on the connecting sleeve and the connecting box body, the pull-out resistance of the connecting box body is effectively improved, thereby ensuring the reliability and stability of the dry connection device.

[0026] Furthermore, the dry connection device is arranged at the node of the side rib column and the rib beam. Since the bearing capacity of concrete at the node of the side rib column and the rib beam is the largest, the connecting sleeve and the connecting box are nested in the position where the bearing capacity of concrete at the node of the side rib column and the rib beam is larger, thereby ensuring the reliability of the installation of the dry connection device and realizing the stable connection of the vertical seams of the wall.

[0027] In summary, the dry connection device for vertical seams of prefabricated composite walls described in the present invention has a reasonable design, convenient construction, low investment cost, and relatively good connection performance, realizing industrialized production, mechanized construction, saving resources, and green environmental protection, which is in line with the current development direction of residential industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the dry connection device of the present invention;

[0029] Figure 2 It is a schematic diagram of the exploded structure of the dry connection device of the present invention;

[0030] Figure 3 It is a schematic diagram of the connection structure between the anchor steel bar and the connection sleeve in the dry connection device of the present invention;

[0031] Figure 4 It is a schematic plan view of the connection between the anchor steel bar and the connection sleeve in the dry connection device of the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection box body in the dry connection device of the present invention;

[0033] Figure 6 It is a schematic diagram of the exploded structure of the connection box body in the dry connection device of the present invention;

[0034] Figure 7 It is a schematic diagram of the assembly structure of the dry connection device described in the present invention.

[0035] Among them, 1 is a connecting sleeve, 2 is a connecting box body, 3 is an anchoring steel bar, 4 is a connecting bolt, 5 is a pad, 6 is a first wall, 7 is a second wall, 8 is a caulking material; 21 is a top plate, 22 is a bottom plate, 23 is a first end plate, 24 is a second end plate, 25 is a hollow connecting column; 61 is a side rib column, 62 is a middle rib column, 63 is a rib beam, and 64 is a building block. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] As attached Figure 1-7 As shown, the present invention provides a dry connection device for vertical seams of assembled composite walls, wherein the dry connection device is horizontally arranged between vertical connection seams of two adjacent walls; the dry connection device comprises a connection sleeve 1, a connection box body 2, a plurality of anchoring steel bars 3, a connection bolt 4, a pad 5 and a caulking material 8, wherein the connection sleeve 1 is horizontally buried at the end of a first wall 6, one end of the connection sleeve 1 extends into the first wall 6, and the other end is flush with the end of the first wall 6; the connection box body 2 is horizontally buried at the end of a second wall 7, and the end of the connection box body 2 is flush with the end of the second wall 7; the connection bolt 4 is horizontally arranged between the connection sleeve 1 and the connection box body 2, and ... Between the connecting box bodies 2, one end of the connecting bolt 4 is fixedly connected to the connecting sleeve 1, and the other end is fixedly connected to the connecting box body 2; a number of anchoring steel bars 3 are evenly arranged horizontally on the outside of the connecting sleeve 1, one end of the anchoring steel bar 3 is anchored in the first wall 6, and the other end is fixedly connected to the connecting sleeve 1; the pad 5 is arranged between the connecting bolt 4 and the connecting box body 2; the caulking material 8 is vertically filled between the first wall 6 and the second wall 7, and preferably, the caulking material 8 adopts EPS foam strips; by filling the vertical seams of the vertical connection of the wall with caulking material, the wall surface is formed as a whole, which is convenient for later decoration and enhances the thermal insulation, heat insulation and sound insulation properties of the wall.

[0038] The connecting sleeve 1 adopts an internal threaded sleeve, and an external thread is arranged on the connecting bolt 4. The end of the connecting bolt 4 extends into the internal threaded sleeve and is fixedly connected by a thread; a plurality of anchoring steel bars 3 are horizontally and evenly arranged on the outside of the internal threaded sleeve. By arranging the anchoring steel bars 3 on the outside of the internal threaded sleeve, the tensile capacity of the internal threaded sleeve is effectively improved, ensuring a reliable connection between the internal threaded sleeve and the first wall 6, and ensuring that the dry connection device can reliably transfer the stress between the walls.

[0039] The connecting box body 2 includes a top plate 21, a bottom plate 22, a first end plate 23, a second end plate 24, a rear side plate and a hollow connecting column 25. The top plate 21 and the bottom plate 22 are horizontally spaced and arranged at the end of the second wall 7, and the top plate 21 and the bottom plate 22 are arranged in parallel; the first end plate 23 and the second end plate 24 are vertically and parallelly arranged between the top plate 21 and the bottom plate 22, the first end plate 23 is arranged on the end side away from the second wall 7, and the second end plate 24 is arranged on the end side close to the second wall 7; the rear side plate is fixedly arranged between the first end plate 23 and the second end plate 24, and the rear side plate is flush with a surface of the second wall 7, and the two ends of the rear side plate are respectively welded and fixed to the ends of the first end plate 23 and the second end plate 24; the top plate 21, the bottom plate 22, the first end plate 23, the second end plate 24 and the rear side plate are surrounded to form a rectangular box structure with an opening on one side, and the opening side of the rectangular box structure is connected to the first end plate 23 and the second end plate 24. The other surface of the second wall 7 is flush; the hollow connecting column 25 is fixedly arranged on the second end plate 24, one end of the hollow connecting column 25 is welded and fixed to the second end plate 24, and the other end is flush with the end of the second wall 7; a circular through hole is arranged on the first end plate 23, and a rectangular through hole is arranged on the second end plate 24; the circular through hole, the rectangular through hole, the hollow connecting column 25 and the connecting sleeve 1 are horizontally centered and penetrated, and the connecting bolt 4 is inserted into the rectangular box structure through the circular through hole on the first end plate 23, and the connecting bolt 4 passes through the rectangular through hole and the hollow connecting column 25 in turn and is fixedly connected with the connecting sleeve 1, and the second end plate 24 and the connecting sleeve 1 are fixedly connected together by the connecting bolt 4, and then the connecting box body 2 and the connecting sleeve 1 are fixedly connected, thereby realizing the fixed connection of the vertical connecting seam between the first wall 6 and the second wall 7; preferably, the connecting bolt 4 adopts a high-strength bolt.

[0040] A bolt through hole is provided on the pad 5, and the pad 5 is sleeved on the connecting bolt 4 and placed between the connecting bolt 4 and the second end plate 24; by arranging the pad 5 between the connecting bolt 4 and the second end plate 23, the force-bearing area between the connecting bolt and the connecting box body is effectively increased, preventing the connecting bolt 4 from being pulled off due to excessive force.

[0041] The hollow connecting column 25 is a rectangular frame structure, which is formed by welding and assembling four rectangular plates; the size of the hollow surface of the rectangular frame structure is consistent with the size of the rectangular through hole and matches the diameter of the connecting bolt 4; the size of the circular through hole is larger than the maximum diameter of the connecting bolt 4; preferably, the rectangular box structure and the hollow connecting column are both welded with steel plates, and the steel plates have the same specifications.

[0042] The first wall 6 and the second wall 7 both adopt prefabricated composite wall panels, which include two side rib columns 61, a plurality of middle rib columns 62, a plurality of rib beams 63, blocks 64 and a concrete outer layer; the two side rib columns 61 are vertically arranged in parallel, a plurality of middle rib columns 62 are vertically arranged between the two side rib columns 61, a plurality of rib beams 63 are horizontally arranged in parallel between the side rib columns 61 and the middle rib columns 62, the side rib columns 61, the middle rib columns 62 and the rib beams 63 form a lattice structure, the lattice structure is filled with blocks 64, and the concrete outer layer is covered on the frame. On the outside of the grid structure, the blocks are bonded and fixed to the concrete outer layer on all sides; preferably, the blocks 64 are aerated concrete blocks; the connecting sleeve 1 and the connecting box body 2 are horizontally arranged at the node of the side rib column 61 and the rib beam 63, and are clamped between the longitudinal reinforcements of the side rib column 61. By clamping the connecting sleeve 1 and the connecting box body 2 between the longitudinal reinforcements of the side rib column 62, the restraining effect of the longitudinal reinforcements on the connecting sleeve 1 and the connecting box body 2 is utilized, so as to effectively improve the pull-out resistance of the connecting box body 2, thereby ensuring the reliability and stability of the dry connection device.

[0043] The construction method of a dry connection device for vertical joints of assembled composite walls according to the present invention comprises the following steps:

[0044] Step 1: Connect the box body

[0045] According to the design requirements of the rectangular box structure, the processed rectangular steel plates are assembled and welded together to form a rectangular box structure; according to the design requirements of the hollow connecting column, the four processed rectangular steel plates are assembled and welded together to form a hollow connecting column; the rectangular box structure and the hollow connecting column are welded and fixed, and the surface is smoothed with an angle grinder or sandpaper to obtain a connecting box; at the same time, connecting bolts and connecting sleeves of consistent specifications are selected as required, and anchor steel bars are welded on the outside of the connecting sleeves.

[0046] Step 2: Prefabricated composite wall panel production

[0047] The prefabrication process of composite wall panels is the same as that of traditional prefabricated wall panels. First, assemble the steel formwork, make the steel mesh, place the protective layer pads, put the steel mesh into the mold, and then place the blocks in the ribs formed by the steel skeleton.

[0048] Step 3: Install and position the connecting sleeve and the connecting box

[0049] The connection and connection box are embedded in the design of the connection parts of the two walls respectively, wherein the connection sleeve with the anchor steel bar is installed at the junction of the side rib column and the rib beam of the first wall, and the end of the connection sleeve is flush with the side form of the first wall panel; the connection box is installed at the junction of the side rib column and the rib beam of the second wall, and the end of the hollow connection column is flush with the side form of the second wall panel; in order to prevent the embedded connection sleeve and the connection box from moving during the concrete pouring process and causing the failure to install, the measures taken are to tie the connection sleeve, the connection box and the steel mesh together with wire after the embedded parts are positioned, and fix the ends of the connection sleeve and the connection box to the formwork to ensure that the embedded parts do not move.

[0050] Step 4: Pour the concrete outer layer

[0051] Standard C30 fine stone concrete is used for pouring, followed by leveling, plastering and standard curing. When the strength reaches the requirement, the formwork is removed to form a standard prefabricated composite wall panel.

[0052] Step 5: Installation of prefabricated composite wall panels

[0053] Determine the wall panel hoisting position and hoisting method, set up temporary supports, and then connect the prefabricated walls. Align the vertical joints of the two adjacent walls, and tighten the connecting bolts and connecting sleeves with a torque wrench with a corresponding preset force.

[0054] Step 6: Vertical seam treatment

[0055] After the vertical connection is completed, high-strength mortar is injected into the connection box and the surface is leveled; EPS foam strips with a diameter of 20mm are inserted along the vertical joint direction, and then the vertical joints are leveled with mortar.

[0056] Example

[0057] The present embodiment provides a dry connection device for vertical seams of assembled composite walls, which is mainly suitable for multi-story and bottom-level assembled building composite wall structures. The dry connection device is used to connect two adjacent prefabricated composite wall panels. First, the position of the dry connection device is determined according to the structural design, which is generally located at the middle rib beam of the prefabricated composite wall panel near the end of the vertical seam. The dry connection device includes a connecting sleeve, a connecting box, a plurality of anchoring steel bars, high-strength bolts, a pad and a caulking material. The connecting sleeve is horizontally buried at the end of the first wall, one end of the connecting sleeve extends into the first wall, and the other end is flush with the end of the first wall. The connecting box is horizontally buried at the end of the second wall, and the end of the connecting box is flush with the end of the second wall. The two walls are connected by high-strength bolts of the same specification to form a whole.

[0058] The connecting box body is formed by welding five rectangular steel plates and hollow connecting columns. The five rectangular steel plates include a top plate, a bottom plate, a first end plate, a second end plate and a rear side plate. The top plate, the bottom plate, the first end plate, the second end plate and the rear side plate are combined to form a rectangular box structure with an opening on one side. A rectangular through hole is opened in the center of the second end plate, and the size of the rectangular through hole is consistent with the hollow surface of the hollow connecting column. The hollow connecting column is welded and fixed by four rectangular steel plates, and the steel plate specifications of the hollow connecting column and the rectangular box structure are the same. The height of the hollow connecting column is less than the height of the second end plate, and the width is greater than the diameter of the high-strength bolt. The center of the first end plate is opened A circular through hole, the diameter of which is larger than the maximum diameter of the high-strength bolt; in this embodiment, the end of the hollow connecting column is flush with the end of the second wall panel to ensure that the longitudinal reinforcement of the side rib column passes through both sides of the hollow rectangular column to ensure the continuity of the longitudinal reinforcement; when the connecting box is installed, the connecting box is completely stuck between the longitudinal reinforcement of the rib column. Due to the restraint of the longitudinal reinforcement, the pull-out resistance of the connecting box is greatly improved; the structural form of the hollow connecting column enables the high-strength bolt to have a larger range of up and down movement when the high-strength bolt and the internal threaded sleeve are connected, thereby improving the connection efficiency of the high-strength bolt and the internal threaded sleeve and greatly improving the wall panel installation efficiency. By opening a circular through hole on the first end plate, it is convenient to place high-strength bolts in the connection box body, avoiding damage to the wall caused by the connection box body being too large due to the lack of holes; the order of placing the high-strength bolts is as follows: insert the high-strength bolts from the circular through hole of the first end plate, penetrate the second end plate, and then pass out from the hollow connecting column to be fixedly connected with the connecting sleeve in the first wall; after the high-strength bolts are placed in the connection box body, the circular through hole is sealed with an iron sheet to prevent concrete from entering the steel box when pouring the wall panel.

[0059] In this embodiment, two anchor steel bars are symmetrically welded on both sides of the connecting sleeve along the wall thickness direction, in order to improve the tensile strength of the internal threaded sleeve, while enhancing the secure connection between the connecting sleeve and the wall, thereby ensuring that the dry connection device can reliably transfer the stress between the walls.

[0060] In this embodiment, a pad is provided between the high-strength bolt and the second end plate, and a bolt through hole is provided on the pad. The purpose of the hole is to ensure that the high-strength bolt can move up and down when the wall panel is installed, and to increase the force area between the high-strength bolt and the box, thereby preventing the high-strength bolt from being pulled off due to excessive tensile force.

[0061] The present invention discloses a dry connection device for vertical seams of assembled composite walls. This connection method is a dry connection. Compared with traditional wet connections, it has the advantages of higher precision, shorter construction period, easy repair of damaged nodes after earthquakes, and convenient installation in remote areas. The connecting sleeve is fixedly connected to the connecting box body by connecting bolts to achieve a fixed connection between adjacent walls. The energy consumption capacity of the connecting box body is significantly better than other connection methods. The wall connection only needs to be connected with bolts on one side of the wall without damaging the other side of the wall, which reduces damage to the wall, is easy to install, and is easy to repair later. The dry connection device described in the present invention has a large allowable error during the installation process, uniform force, reliable connection, high bearing capacity, and is suitable for large-scale promotion and application. The dry connection device described in the present invention can be applied to horizontal seams and vertical seams through changes in the structural form. It has a simple and flexible structure and is easy to make and install. The joint processing method is simple to operate and has good density.

[0062] The patent of the present invention has a simple structure, a safe structure, advanced technology, simple construction and quick building. It is completely suitable for the assembly and connection of low-rise integral building walls and partial structural walls of multi-story buildings. Compared with the existing prefabricated construction technology, it has obvious technical advantages and is conducive to popularization and promotion of application.

[0063] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A dry connection device for vertical joints of assembled composite walls, characterized in that: The dry connection device is horizontally arranged between the vertical connection seams of two adjacent walls; the dry connection device comprises a connection sleeve (1), a connection box body (2) and a connection bolt (4); the connection sleeve (1) is horizontally buried at the end of the first wall body (6), and the end of the connection sleeve (1) is flush with the end of the first wall body (6); the connection box body (2) is horizontally buried at the end of the second wall body (7), and the end of the connection box body (2) is flush with the end of the second wall body (7); the connection bolt (4) is horizontally arranged between the connection sleeve (1) and the connection box body (2), and one end of the connection bolt (4) is fixedly connected to the connection sleeve (1), and the other end is fixedly connected to the connection box body (2); The connecting box body (2) comprises a top plate (21), a bottom plate (22), a first end plate (23), a second end plate (24), a rear side plate and a hollow connecting column (25); the top plate (21), the bottom plate (22), the first end plate (23), the second end plate (24) and the rear side plate together form a rectangular box body structure with an opening on one side, and the opening side of the rectangular box body structure is flush with the surface of the second wall (7); The hollow connecting column (25) is fixedly arranged on the second end plate (24), and the second end plate (24) is arranged vertically close to the end of the second wall (7); one end of the hollow connecting column (25) is welded and fixed to the second end plate (24), and the other end is flush with the end of the second wall (7); the connecting bolt (4) is horizontally inserted into the hollow connecting column (25), one end of the connecting bolt (4) is connected to the second end plate (24), and the other end is connected to the connecting sleeve (1); The first end plate (23) is provided with a circular through hole, and the second end plate (24) is provided with a rectangular through hole; the circular through hole, the rectangular through hole hollow connecting column (25) and the connecting sleeve (1) are horizontally aligned and connected; the hollow connecting column (25) is a rectangular frame structure, and the size of the hollow surface of the rectangular frame structure is consistent with the size of the rectangular through hole and matches the diameter of the connecting bolt (4); the size of the circular through hole is larger than the maximum diameter of the connecting bolt (4); It also comprises a plurality of anchoring steel bars (3), which are evenly arranged horizontally on the outside of the connecting sleeve (1), one end of the anchoring steel bar (3) is anchored in the first wall (6), and the other end is fixedly connected to the connecting sleeve (1).

2. A dry connection device for vertical joints of assembled composite walls according to claim 1, characterized in that: A backing plate (5) is provided between the connecting bolt (4) and the second end plate (24).

3. A dry connection device for vertical joints of assembled composite walls according to claim 1, characterized in that: The rectangular box structure and the hollow connecting columns are both welded with steel plates with the same specifications.

4. A dry connection device for vertical joints of assembled composite walls according to claim 1, characterized in that: A sealing material (8) is provided in the vertical seam between the first wall (6) and the second wall (7), and the sealing material (8) is made of EPS foam strips.

5. A dry connection device for vertical joints of assembled composite walls according to claim 1, characterized in that: The connecting bolts (4) are high-strength bolts.

6. A dry connection device for vertical joints of assembled composite walls according to claim 1, characterized in that: The first wall (6) and the second wall (7) both use prefabricated composite wall panels; the prefabricated composite wall panels include side rib columns (61), middle rib columns (62), rib beams (63), blocks (64) and a concrete outer layer; the side rib columns (61), middle rib columns (62) and rib beams (63) form a frame structure; the frame structure is filled with blocks (64); the concrete outer layer is coated on the outside of the frame structure; the connecting sleeve (1) and the connecting box (2) are both horizontally arranged in the side rib columns (61) and clamped between the longitudinal ribs of the side rib columns (61).

7. A dry connection device for vertical joints of assembled composite walls according to claim 6, characterized in that: The dry connection device is arranged at the node between the side rib column and the rib beam.

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