A prefabricated wall panel assembly structure and its assembly method

Abstract

This invention discloses a precast wall panel assembly structure and assembly method, relating to the field of precast wall panel technology. It includes a first wall panel and a second wall panel. The first wall panel has multiple insertion slots on one side. A hydraulic expansion and splicing mechanism is symmetrically installed inside each insertion slot. The hydraulic expansion and splicing mechanism consists of a metal sleeve, interlocking teeth, a sealing rubber ring, a piston, and an oil injection mechanism. The metal sleeve is welded and fixed to the insertion slots. The metal sleeve has an oil cavity inside. One end of the metal sleeve has multiple sets of mounting grooves, and the outer side of each mounting groove has four annularly distributed sliding grooves. The second wall panel has multiple insertion blocks on one side. Each insertion block has symmetrically arranged connecting holes inside. The inner end of each connecting hole has multiple interlocking grooves. This invention solves the problem that existing precast wall panels, mostly connected by bolts, are prone to stress concentration, leading to reduced structural stability.

Description

Technical Field

[0001] This invention relates to the field of prefabricated wall panel technology, specifically to a prefabricated wall panel assembly structure and its assembly method. Background Technology

[0002] Against the backdrop of rapid development in building industrialization, precast wall panels are widely used due to their advantages such as high construction efficiency and stable quality. However, existing precast wall panel assembly structures mostly employ bolt connections, welding, or simple mortise and tenon joints. These connection methods suffer from low assembly precision, complex construction, and insufficient seismic performance. Furthermore, some connection methods make it difficult to reuse components, which is detrimental to the development of green buildings.

[0003] For example, the Chinese authorized patent CN213014785U, entitled "A Prefabricated Wall Panel Modular Assembly Structure," includes a mounting frame fixedly installed on the side of a wall. The mounting frame has multiple bottom support plates and a top fixing plate fixedly installed on its side. There is an installation space between the paired bottom support plates and the top fixing plate. Multiple wall panel modules are arranged in the installation space. The multiple wall panel modules located in the same installation space are connected end to end. One side wall of the wall panel module extends outward with two trapezoidal protrusions with trapezoidal cross-sections. The other side wall of the wall panel module has two trapezoidal grooves with trapezoidal cross-sections. In two adjacent wall panel modules, the trapezoidal protrusion of one wall panel module can be paired and inserted into the trapezoidal groove of the other wall panel module to achieve a snap-fit ​​connection between the two adjacent wall panel modules.

[0004] While the aforementioned existing technologies can achieve the basic connection function of precast wall panels, traditional assembly methods have many drawbacks. Welding and grouting connections not only pollute the environment but also increase the amount of construction waste. Furthermore, bolted connections suffer from stress concentration, which can reduce structural stability. In addition, rotating each bolt individually is time-consuming, affecting construction efficiency. Therefore, these methods do not meet current needs. To address this, we propose a precast wall panel assembly structure and its assembly method. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated wall panel assembly structure and assembly method, in order to solve the problem mentioned in the background art that most existing prefabricated wall panels are connected by bolts, which easily leads to stress concentration and reduced structural stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated wall panel assembly structure, comprising a first wall panel and a second wall panel. The first wall panel has multiple insertion slots on one side. A hydraulic expansion and splicing mechanism is symmetrically installed vertically inside each insertion slot. The hydraulic expansion and splicing mechanism consists of a metal sleeve, interlocking teeth, a sealing rubber ring, a piston, and an oil injection mechanism. The metal sleeve is welded and fixed to the insertion slots. An oil cavity is provided inside the metal sleeve, and the piston is slidably disposed inside the oil cavity. Multiple sets of mounting grooves are provided at one end of the metal sleeve, and the sealing rubber ring is sealed inside the mounting grooves. Four annularly distributed sliding grooves are provided on the outer side of the mounting grooves. The interlocking teeth are slidably installed inside the sliding grooves, and the inner side of the interlocking teeth is fixed to the sealing rubber ring. The second wall panel has multiple insertion blocks on one side, and the insertion blocks engage with the insertion slots. Connecting holes are symmetrically arranged vertically inside each insertion block, and the connecting holes engage with the metal sleeve. Multiple interlocking grooves are provided at the inner end of each connecting hole, and the interlocking teeth engage with the interlocking grooves.

[0007] Preferably, a through hole is provided between the oil injection mechanism and the metal sleeve, and the through hole is connected to the oil cavity. A fixing plate is fixedly provided at the middle position of the oil injection mechanism, and a conical central hole is provided at the center position of the fixing plate. A conical sealing plug is provided on the inner side of the central hole of the fixing plate. An elastic support mechanism is installed between the sealing plug and the metal sleeve. An oil injection hole is provided on one side of the oil injection mechanism. An oil injection nozzle is provided at the front end of the first wall plate. The oil injection nozzle is connected to the oil injection hole and is used to connect to an external oil pump pipeline.

[0008] Preferably, the elastic support mechanism consists of a fixed column, a movable column that slides and limits with the fixed column, and a spring installed between the fixed column and the movable column. One end of the fixed column is fixed to a metal sleeve, and one end of the movable column is fixed to a sealing plug.

[0009] Preferably, a positioning mechanism is provided at the middle position of the insertion slot. The positioning mechanism includes a limiting groove disposed inside the insertion slot. Sliding limiting movable plates are symmetrically installed at the top and bottom inside the limiting groove, and one end of the movable plate extends into the interior of the insertion slot. A positioning block is integrally formed at one end of the movable plate, and one end of the positioning block has an inclined structure. Supporting springs are installed on both sides between the upper and lower movable plates. A slot is provided at the middle position of the insertion block. The positioning groove consists of a guide groove and a slot. The guide groove is used to squeeze the positioning block to allow the movable plate to enter, and the positioning block cooperates with the supporting spring to engage with the slot.

[0010] Preferably, a gear is rotatably installed at the center of the front end of the limiting groove, and staggered rack plates are provided on both sides of the gear. The sides of the rack plates slide and limit the first wall plate, and the rack plates are meshed with the gear. One end face of the two rack plates is fixed to the upper and lower movable plates respectively.

[0011] Preferably, the front end of the first wall panel is also provided with an adjusting wheel, the adjusting wheel is rotatably connected to the first wall panel, and the shaft at one end of the adjusting wheel is connected to the shaft of the gear.

[0012] Preferably, a friction damper is provided between the second wall panel and the plug-in block, and the two ends of the friction damper are respectively fixed to the second wall panel and the plug-in block by bolts.

[0013] Preferably, the metal sleeve has an exhaust port at its end.

[0014] Preferably, the contact surfaces of the first wall panel and the second wall panel are provided with anti-friction rubber linings.

[0015] The assembly method for precast wall panel assembly structures includes the following steps: Step 1: Connect the first wall panel and the second wall panel, aligning the insertion slot with the insertion block. During the connection process, because the positioning block has an inclined structure, when it contacts the guide groove of the positioning slot, the guide groove squeezes the positioning block, causing the two positioning blocks to move towards the center synchronously, thus allowing the insertion slot and the insertion block to connect smoothly. Step 2: After the insertion slot and the insertion block are fully engaged, the positioning block extends into the inside of the slot. At this time, the positioning block loses the pressure of the guide slot and, under the action of the support spring, the positioning block separates synchronously, realizing a stable connection between the slot and the positioning block, and completing the initial locking of the first wall panel and the second wall panel. Step 3: Connect the external pressure pump to the oil injection nozzle of the hydraulic expansion and splicing mechanism through the hydraulic oil pipe. Start the external pressure pump so that the hydraulic oil enters the oil injection mechanism through the oil injection hole. The hydraulic oil applies pressure to the sealing plug through the through hole in the center of the fixed plate, causing the elastic support mechanism to contract. The hydraulic oil can pass through the center hole and enter the oil chamber of the metal sleeve through the through hole to squeeze the piston. As the conical piston moves, the sealing rubber ring is squeezed and expanded, squeezing the meshing teeth outward, so that the meshing teeth and the meshing groove at the end of the connection hole are further tightened to form a high-strength mechanical connection. Step 4: After stopping the oil injection, the hydraulic oil in the oil chamber reacts to the other end of the sealing plug, and works with the elastic support mechanism to seal the center hole of the fixed plate, ensuring the hydraulic oil's support effect on the piston.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention replaces the conventional bolt connection in the prior art with a hydraulic expansion and tightening splicing mechanism. The hydraulic expansion and tightening splicing mechanism consists of a metal sleeve, interlocking teeth, a sealing rubber ring, a piston, and an oil injection mechanism. During the docking process between the insertion slot of the first wall panel and the insertion block of the second wall panel, the metal sleeve inside the insertion slot extends into the connection hole of the insertion block. Since the interlocking teeth are located outside the sealing rubber ring, the connection hole contacts the interlocking teeth and compresses them. The elasticity of the sealing rubber ring causes it to contract, thus facilitating the smooth entry of the metal sleeve into the connection hole. The end of the connection hole has multiple interlocking grooves. After the metal sleeve reaches the installation position, the interlocking teeth engage with the interlocking grooves. Subsequently, after the positioning mechanism locks the insertion slot and the insertion block, the operator uses an external pressure pump and a hydraulic oil pipe to connect the oil injection nozzle, allowing hydraulic oil to enter the oil injection mechanism from the oil injection hole. Pressure is applied to the sealing plug through the through hole in the center of the fixed plate, causing the elastic support mechanism to... As the structure contracts, hydraulic oil passes through the central hole and enters the oil chamber of the metal sleeve through the through hole, squeezing the piston and pushing the conical piston to move. This process also compresses the sealing rubber ring, causing it to expand and squeeze the meshing teeth outwards, further improving the fastening effect between the meshing teeth and the meshing groove, forming a high-strength mechanical connection. After the oil injection stops, the hydraulic oil in the oil chamber reacts to the other end of the sealing plug, working with the elastic support mechanism to seal the central hole of the fixed plate, ensuring the hydraulic oil's support effect on the piston. This allows for rapid and precise alignment without the need to rotate the bolts one by one, significantly shortening the installation time and greatly improving construction efficiency. It also avoids stress concentration problems and improves structural stability. In addition, the high-strength mechanical connection formed by the hydraulic expansion and splicing mechanism does not require a complex positioning process. Multi-directional fastening can be achieved through a single expansion operation, reducing errors from manual operation and ensuring the overall strength and reliability of the precast wall panel assembly structure.

[0017] 2. This invention utilizes a positioning mechanism with an auxiliary hydraulic expansion and splicing mechanism. During the docking process between the insertion slot of the first wall panel and the insertion block of the second wall panel, the positioning blocks, due to their inclined structure, exert pressure on the guide groove of the positioning slot upon contact, causing the two positioning blocks to converge synchronously towards the center and smoothly enter the guide groove. After the insertion slot and the insertion block are engaged, the positioning blocks extend into the interior of the slot. Without the pressure of the guide groove, the positioning blocks separate synchronously under the action of the support spring, thus achieving the connection between the slot and the positioning blocks. If the two wall panels need to be disassembled due to installation issues, simply rotate the adjusting wheel to drive the gear. With the gear meshing with the two rack plates, the movable plates at one end of the positioning block are driven to quickly close together. At this time, the first and second wall plates can be easily separated by pulling them outward. The positioning mechanism locks the first and second wall plates together. During the process of the external pressure pump injecting oil into the hydraulic expansion and splicing mechanism, a stable initial connection is formed, which effectively prevents the wall plates from shifting or separating during the oil injection and expansion process of the hydraulic expansion and splicing mechanism. This provides a stable foundation for hydraulic expansion and ensures that a high-strength mechanical connection can be formed between the metal sleeve and the connecting hole. Moreover, this structure does not require complicated alignment operations, which reduces the installation difficulty and improves the assembly efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of the first and second wall panels of the present invention; Figure 2 This is a schematic diagram of the structure of the first and second wall panels before assembly according to the present invention; Figure 3 For the present invention Figure 2 Enlarged view of a portion of region A in the middle; Figure 4 This is a perspective view of the first and second wall panels after assembly according to the present invention. Figure 5 This is a perspective view of the positioning mechanism of the present invention; Figure 6 This is a perspective view of the hydraulic expansion and splicing mechanism of the present invention.

[0019] In the diagram: 1. First wall panel; 2. Second wall panel; 3. Insertion groove; 4. Oil nozzle; 5. Adjusting wheel; 6. Insertion block; 7. Hydraulic expansion and splicing mechanism; 8. Positioning mechanism; 9. Connecting hole; 10. Positioning groove; 11. Friction damper; 12. Metal sleeve; 13. Engaging teeth; 14. Piston; 15. Oil injection mechanism; 16. Limiting groove; 17. Movable plate; 18. Support spring; 19. Positioning block; 21. Engaging groove; 22. Guide groove; 23. Slot; 24. Gear; 25. Rack plate; 28. Sealing rubber ring; 29. ​​Oil chamber; 30. Through hole; 31. Fixing plate; 32. Sealing plug; 33. Elastic support mechanism; 34. Oil injection hole. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Please see Figure 1-6 This invention provides an embodiment of a prefabricated wall panel assembly structure, comprising a first wall panel 1 and a second wall panel 2. One side of the first wall panel 1 is provided with multiple insertion slots 3. Hydraulic expansion and splicing mechanisms 7 are symmetrically installed vertically within the insertion slots 3. The hydraulic expansion and splicing mechanism 7 consists of a metal sleeve 12, interlocking teeth 13, a sealing rubber ring 28, a piston 14, and an oil injection mechanism 15. The metal sleeve 12 is welded and fixed to the insertion slots 3. An oil cavity 29 is provided inside the metal sleeve 12, and the piston 14 is slidably disposed inside the oil cavity 29. Multiple sets of mounting grooves are provided at one end of the metal sleeve 12. The sealing rubber ring 28 is sealed inside the mounting groove. The outer side of the mounting groove is provided with four annularly distributed sliding grooves. The biting teeth 13 are slidably installed inside the sliding grooves. The inner side of the biting teeth 13 is fixed with the sealing rubber ring 28. The end of the metal sleeve 12 is provided with an exhaust hole. One side of the second wall panel 2 is provided with multiple plug-in blocks 6. The plug-in blocks 6 are engaged with the plug-in grooves 3. The plug-in blocks 6 are symmetrically provided with connecting holes 9 inside. The connecting holes 9 are engaged with the metal sleeve 12. The inner end of the connecting holes 9 is provided with multiple biting grooves 21. The biting teeth 13 are engaged with the biting grooves 21. During assembly, the first wall panel 1 and the second wall panel 2 are joined together, the insertion block 6 is inserted into the insertion groove 3, and the metal sleeve 12 is inserted into the connection hole 9. At this time, the engagement teeth 13 are squeezed by the connection hole 9, and the sealing rubber ring 28 contracts to facilitate insertion. Subsequently, hydraulic oil is injected through the oil injection mechanism 15, which pushes the piston 14 to squeeze the sealing rubber ring 28 to expand it, thereby squeezing the engagement teeth 13 outwards, so that it is tightly engaged with the engagement groove 21. Compared with the traditional connection method, the stress concentration problem of bolt connection is avoided. Multi-directional high-strength fastening is achieved through hydraulic expansion, resulting in higher connection stability. Moreover, the installation process does not require tightening each bolt individually, improving assembly efficiency.

[0022] Please see Figure 2 , Figure 3 , Figure 4 and Figure 6A through hole 30 is provided between the oil injection mechanism 15 and the metal sleeve 12, and the through hole 30 is connected to the oil cavity 29. A fixing plate 31 is fixedly provided at the middle position of the oil injection mechanism 15, and a conical central hole is provided at the center position of the fixing plate 31. A conical sealing plug 32 is provided on the inner side of the central hole of the fixing plate 31. An elastic support mechanism 33 is installed between the sealing plug 32 and the metal sleeve 12. An oil injection hole 34 is provided on one side of the oil injection mechanism 15. An oil injection nozzle 4 is provided at the front end of the first wall plate 1. The oil injection nozzle 4 is connected to the oil injection hole 34, and the oil injection nozzle 4 is used to connect to the external oil pump pipeline. An external pressure pump injects hydraulic oil into the oil injection mechanism 15 through the oil injection nozzle 4 and the oil injection hole 34. The hydraulic oil pushes the sealing plug 32 to compress the elastic support mechanism 33, and passes through the center hole and through hole 30 of the fixed plate 31 into the oil chamber 29 of the metal sleeve 12. After the oil injection stops, the hydraulic oil in the oil chamber 29 pushes back the sealing plug 32, the elastic support mechanism 33 resets, and the sealing plug 32 re-seals the center hole of the fixed plate 31, maintaining stable pressure in the oil chamber 29. This ensures that the hydraulic oil stably pushes the piston 14 to achieve expansion and tightening, and effectively prevents hydraulic oil leakage, ensuring the long-term stable operation of the hydraulic expansion and splicing mechanism 7 and improving the reliability of the precast wall panel connection.

[0023] Furthermore, the elastic support mechanism 33 consists of a fixed column, a movable column that slides and limits to the fixed column, and a spring installed between the fixed column and the movable column. One end of the fixed column is fixed to the metal sleeve 12, and one end of the movable column is fixed to the sealing plug 32. When hydraulic oil is injected, the hydraulic oil pressure overcomes the spring force, pushing the movable column to slide relative to the fixed column, compressing the spring, and causing the sealing plug 32 to move, opening the oil circuit. After the oil injection stops, the spring force pushes the movable column back to its original position, causing the sealing plug 32 to close the oil circuit again. The automatic opening, closing, and sealing of the oil circuit is achieved through the elastic support mechanism 33. The structure is simple and reliable, ensuring the normal operation of the hydraulic system, and can buffer hydraulic oil pressure fluctuations, extending the service life of the hydraulic expansion and splicing mechanism 7.

[0024] Please see Figure 2 , Figure 3 and Figure 4 A positioning mechanism 8 is provided at the middle position of the insertion slot 3. The positioning mechanism 8 includes a limiting groove 16 provided inside the insertion slot 3. Sliding limiting movable plates 17 are symmetrically installed inside the limiting groove 16, and one end of the movable plate 17 extends into the interior of the insertion slot 3. A positioning block 19 is integrally formed at one end of the movable plate 17, and one end of the positioning block 19 has an inclined structure. Support springs 18 are installed on both sides between the upper and lower movable plates 17. A slot 23 is provided at the middle position of the insertion block 6. The positioning groove 10 is composed of a guide groove 22 and a slot 23. The guide groove 22 is used to squeeze the positioning block 19 to make the movable plate 17 enter, and the positioning block 19 cooperates with the support spring 18 to engage with the slot 23. When the first wall panel 1 and the second wall panel 2 are joined, the positioning block 19 contacts the guide groove 22, and the movable plate 17 slides under pressure, and the support spring 18 is compressed; when the plug block 6 is engaged with the plug groove 3, the positioning block 19 enters the slot 23, and the support spring 18 resets and pushes the positioning block 19 to lock, so as to realize the rapid and accurate positioning and initial locking of the prefabricated wall panel and prevent the wall panel from shifting during the hydraulic tightening process.

[0025] Please see Figure 1 and Figure 5 A gear 24 is rotatably installed at the center of the front end of the limiting groove 16. A rack plate 25 is provided on both sides of the gear 24 in a staggered manner. The side of the rack plate 25 slides and limits the first wall plate 1, and the rack plate 25 is meshed with the gear 24. One end face of the two rack plates 25 is fixed to the upper and lower movable plates 17 respectively. An adjusting wheel 5 is also provided at the front end of the first wall plate 1. The adjusting wheel 5 is rotatably connected to the first wall plate 1, and the shaft of one end of the adjusting wheel 5 is connected to the shaft of the gear 24. Rotating the adjusting wheel 5 drives the gear 24 to rotate. The gear 24 meshes with the rack plate 25, causing the rack plates 25 on both sides to move synchronously, which in turn drives the movable plate 17 and the positioning block 19 to move, thereby enabling the positioning block 19 to be locked and unlocked. Through the gear and rack transmission structure, the positioning block 19 can be easily controlled. The operation is labor-saving and precise, and the structure is compact, occupying little space, which facilitates the installation and disassembly of prefabricated wall panels.

[0026] Please see Figure 2 , Figure 3 and Figure 4 A friction damper 11 is provided between the second wall panel 2 and the plug-in block 6, and both ends of the friction damper 11 are fixed to the second wall panel 2 and the plug-in block 6 respectively by bolts. When the precast wall panel is subjected to external forces such as vibration, the second wall panel 2 and the plug-in block 6 tend to move relative to each other. The internal components of the friction damper 11 rub against each other, converting the vibration energy into heat energy and dissipating it, thereby reducing the vibration amplitude of the wall panel. This effectively improves the seismic performance of the precast wall panel assembly structure, enhances the safety of the building under disasters such as earthquakes, and ensures the stability of the building structure.

[0027] Furthermore, the contact surfaces of the first wall panel 1 and the second wall panel 2 are both provided with anti-friction rubber linings. During the wall panel docking process, the anti-friction rubber linings reduce the friction between the contact surfaces of the first wall panel 1 and the second wall panel 2, making it easier for the wall panels to dock. During use, the elasticity of the rubber linings can buffer the small displacements and vibrations between the wall panels.

[0028] The assembly method for precast wall panel assembly structures includes the following steps: Step 1: Connect the first wall panel 1 and the second wall panel 2 so that the insertion slot 3 is aligned with the insertion block 6. During the connection process, since the positioning block 19 has an inclined structure, when it contacts the guide groove 22 of the positioning slot 10, the guide groove 22 squeezes the positioning block 19, causing the two positioning blocks 19 to move towards the center synchronously, so that the insertion slot 3 and the insertion block 6 can be connected smoothly. Step 2: After the insertion slot 3 and the insertion block 6 are fully engaged, the positioning block 19 extends into the interior of the slot 23. At this time, the positioning block 19 loses the pressure of the guide slot 22. Under the action of the support spring 18, the positioning block 19 separates synchronously, realizing a stable connection between the slot 23 and the positioning block 19, and completing the initial locking of the first wall panel 1 and the second wall panel 2. Step 3: Connect the external pressure pump to the oil injection nozzle 4 of the hydraulic expansion and splicing mechanism 7 through the hydraulic oil pipe. Start the external pressure pump so that the hydraulic oil enters the oil injection mechanism 15 through the oil injection hole 34. The hydraulic oil applies pressure to the sealing plug 32 through the through hole 30 in the center of the fixed plate 31, causing the elastic support mechanism 33 to contract. The hydraulic oil can pass through the central hole and enter the oil chamber 29 of the metal sleeve 12 through the through hole 30 to squeeze the piston 14. As the conical piston 14 moves, the sealing rubber ring 28 is squeezed and expanded, squeezing the meshing teeth 13 outward, so that the meshing teeth 13 and the meshing groove 21 at the end of the connecting hole 9 are further tightened to form a high-strength mechanical connection. Step 4: After stopping the oil injection, the hydraulic oil in the oil chamber 29 reacts to the other end of the sealing plug 32, and works with the elastic support mechanism 33 to seal the center hole of the fixed plate 31, ensuring the hydraulic oil's support effect on the piston 14.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated wall panel assembly structure, comprising a first wall panel (1) and a second wall panel (2), characterized in that: The first wall panel (1) has multiple insertion slots (3) on one side. Hydraulic expansion and splicing mechanisms (7) are symmetrically installed inside the insertion slots (3). The hydraulic expansion and splicing mechanism (7) consists of a metal sleeve (12), interlocking teeth (13), sealing rubber rings (28), a piston (14), and an oil injection mechanism (15). The metal sleeve (12) is welded to the insertion slots (3). An oil cavity (29) is provided inside the metal sleeve (12), and the piston (14) is slidably disposed inside the oil cavity (29). Multiple sets of mounting slots are provided at one end of the metal sleeve (12), and the sealing rubber rings (28) are... 8) The sealing is set inside the mounting groove. The outer side of the mounting groove is provided with four annularly distributed sliding grooves. The biting teeth (13) are slidably installed inside the sliding grooves, and the inner side of the biting teeth (13) is fixed with the sealing rubber ring (28). The second wall panel (2) is provided with multiple plug-in blocks (6) on one side, and the plug-in blocks (6) are engaged with the plug-in grooves (3). The plug-in blocks (6) are symmetrically provided with connecting holes (9) inside, and the connecting holes (9) are engaged with the metal sleeve (12). The inner end of the connecting holes (9) is provided with multiple biting grooves (21), and the biting teeth (13) are engaged with the biting grooves (21). A through hole (30) is provided between the oil injection mechanism (15) and the metal sleeve (12), and the through hole (30) is connected to the oil cavity (29). A fixing plate (31) is fixedly provided at the middle position of the oil injection mechanism (15), and a conical central hole is provided at the center position of the fixing plate (31). A conical sealing plug (32) is provided on the inner side of the central hole of the fixing plate (31). An elastic support mechanism (33) is installed between the sealing plug (32) and the metal sleeve (12). An oil injection hole (34) is provided on one side of the oil injection mechanism (15). An oil injection nozzle (4) is provided at the front end of the first wall plate (1). The oil injection nozzle (4) is connected to the oil injection hole (34), and the oil injection nozzle (4) is used to connect to the external oil pump pipeline.

2. The prefabricated wall panel assembly structure according to claim 1, characterized in that: The elastic support mechanism (33) consists of a fixed column, a movable column that slides and limits with the fixed column, and a spring installed between the fixed column and the movable column. One end of the fixed column is fixed to the metal sleeve (12), and one end of the movable column is fixed to the sealing plug (32).

3. The prefabricated wall panel assembly structure according to claim 2, characterized in that: A positioning mechanism (8) is provided at the middle position of the insertion slot (3). The positioning mechanism (8) includes a limiting groove (16) provided inside the insertion slot (3). A sliding limiting movable plate (17) is symmetrically installed inside the limiting groove (16), and one end of the movable plate (17) extends into the interior of the insertion slot (3). A positioning block (19) is integrally formed at one end of the movable plate (17), and one end of the positioning block (19) is inclined. Support springs (18) are installed on both sides between the upper and lower movable plates (17). A slot (23) is provided at the middle position of the insertion block (6), and a positioning groove (10) is also provided. The positioning groove (10) is composed of a guide groove (22) and a slot (23). The guide groove (22) is used to squeeze the positioning block (19) to make the movable plate (17) enter, and the positioning block (19) cooperates with the support spring (18) to engage with the slot (23).

4. The prefabricated wall panel assembly structure according to claim 3, characterized in that: A gear (24) is rotatably installed at the center of the front end of the limiting groove (16). The gear (24) has staggered rack plates (25) on both sides. The side of the rack plate (25) slides and limits the first wall plate (1), and the rack plate (25) meshes with the gear (24). One end face of the two rack plates (25) is fixed to the upper and lower movable plates (17) respectively.

5. The prefabricated wall panel assembly structure according to claim 4, characterized in that: The front end of the first wall panel (1) is also provided with an adjusting wheel (5), which is rotatably connected to the first wall panel (1), and the shaft of one end of the adjusting wheel (5) is connected to the shaft of the gear (24).

6. The prefabricated wall panel assembly structure according to claim 1, characterized in that: A friction damper (11) is provided between the second wall panel (2) and the plug block (6), and the two ends of the friction damper (11) are fixed to the second wall panel (2) and the plug block (6) respectively by bolts.

7. The prefabricated wall panel assembly structure according to claim 1, characterized in that: The metal sleeve (12) has an exhaust hole at its end.

8. The prefabricated wall panel assembly structure according to claim 1, characterized in that: The contact surfaces of the first wall panel (1) and the second wall panel (2) are both provided with anti-friction rubber linings.

9. An assembly method based on the prefabricated wall panel assembly structure according to claim 5, characterized in that: Includes the following steps: Step 1: Connect the first wall panel (1) and the second wall panel (2) so that the insertion slot (3) is aligned with the insertion block (6). During the connection process, since the positioning block (19) has an inclined structure, when it contacts the guide groove (22) of the positioning slot (10), the guide groove (22) squeezes the positioning block (19), causing the two positioning blocks (19) to move towards the center synchronously, so that the insertion slot (3) and the insertion block (6) can be connected smoothly. Step 2: After the insertion slot (3) and the insertion block (6) are fully engaged, the positioning block (19) extends into the inside of the slot (23). At this time, the positioning block (19) loses the pressure of the guide slot (22). Under the action of the support spring (18), the positioning block (19) separates synchronously, realizing the stable connection between the slot (23) and the positioning block (19), and completing the initial locking of the first wall panel (1) and the second wall panel (2). Step 3: Connect the external pressure pump to the oil injection nozzle (4) of the hydraulic expansion splicing mechanism (7) through the hydraulic oil pipe, start the external pressure pump, and let the hydraulic oil enter the oil injection mechanism (15) through the oil injection hole (34). The hydraulic oil applies pressure to the sealing plug (32) through the through hole (30) in the center of the fixed plate (31), causing the elastic support mechanism (33) to contract. The hydraulic oil can pass through the central hole and enter the oil chamber (29) of the metal sleeve (12) through the through hole (30) to squeeze the piston (14). As the conical piston (14) moves, the sealing rubber ring (28) is squeezed and expanded, squeezing the meshing teeth (13) outward, so that the meshing teeth (13) and the meshing groove (21) at the end of the connecting hole (9) are further tightened to form a high-strength mechanical connection. Step 4: After stopping the oil injection, the hydraulic oil in the oil chamber (29) reacts to the other end of the sealing plug (32), and works with the elastic support mechanism (33) to seal the center hole of the fixed plate (31), ensuring the hydraulic oil's support effect on the piston (14).

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