Fabricated building outer wall and construction method thereof
By working together with the sealing mechanism and the prompting mechanism, the problem of sealing gaps in prefabricated exterior walls is solved, enabling stable connection and real-time adjustment of prefabricated exterior walls, thus improving construction efficiency and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN JIUDING CONSTR GRP CO LTD
- Filing Date
- 2026-02-04
- Publication Date
- 2026-05-12
AI Technical Summary
After the prefabricated building exterior walls are installed, there are problems such as the gaps between the prefabricated exterior walls being difficult to seal effectively, and the walls easily separating after the external force disappears.
The sealing mechanism includes a sealing component, a switching component, a pushing component, a reciprocating component, and a protective component. Through the coordinated work of components such as the piston cylinder, piston shaft, and connecting pipe, it achieves sealing and continuous tension of the wall gap, uses air pressure to keep the wall in place, and indicates the degree of loosening through a prompting mechanism.
It effectively seals the gaps between prefabricated exterior walls, ensuring that the walls remain tightly fitted even after the external force is removed, and automatically adjusts under wind or vibration, providing real-time prompts, thus improving construction efficiency and stability.
Smart Images
Figure CN122013908A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of prefabricated building exterior wall technology, specifically to a prefabricated building exterior wall and its construction method. Background Technology
[0002] Prefabricated building exterior walls are a type of prefabricated wall. During construction, these exterior walls are simply assembled together to complete the installation, eliminating the need for pouring concrete and significantly improving construction efficiency.
[0003] Chinese patent document CN207672796U discloses a prefabricated waterproof exterior wall and a prefabricated wall structure, relating to the field of prefabricated building technology. This utility model provides a prefabricated waterproof exterior wall, including a wall body, a water-repellent layer, a water-stopping component, and connecting reinforcing bars. The water-stopping component includes a connecting steel plate and a sealing element, both located at both ends of the wall body and connected to it. The sealing element is fitted onto the connecting steel plate. The water-repellent layer is adhered to one side of the wall body. The prefabricated waterproof exterior wall and prefabricated wall structure provided by the above-mentioned prior art are simple in structure and easy to use; at the same time, they also have the characteristics of good waterproof performance, material saving, and low cost.
[0004] However, after the prefabricated exterior walls are installed, there is still a certain gap between them. At this time, external force needs to be applied to squeeze the two prefabricated exterior walls together to reduce the gap. However, this is not only troublesome, but also, once the force applied to the prefabricated exterior walls is removed, the prefabricated exterior walls will separate by a very small distance, which is quite inconvenient. Summary of the Invention
[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a prefabricated building exterior wall and its construction method.
[0006] The technical solution of the present invention: a prefabricated building exterior wall, comprising a wall body, and further comprising: a sealing mechanism installed within the wall body; a notification mechanism installed on the wall body and used to notify of the wall body's status; the sealing assembly comprising a sealing component, a switching component, a pushing component, a reciprocating component, and a protective component; the sealing component is installed within the wall body and used to seal the gap between two walls; the switching component is installed within the wall body and connects the pushing component and the sealing component; the pushing component is installed within the wall body and delivers air into the sealing component when the switching component is in operation; the reciprocating component is installed on the wall body, and its movable end moves with the protective component; the protective component is installed within the wall body and used to protect the gap between the two walls; the switching component is pushed in by another wall body and in operation, the pushing component pushes air into the sealing component, tightening the two walls, and the reciprocating component continuously delivers air into the sealing component.
[0007] Preferably, the sealing assembly includes a piston cylinder, a piston shaft, a connecting pipe, and a sealing airbag; the piston cylinder is installed inside the wall; the large end of the piston shaft is sleeved inside the piston cylinder, and the small end is connected to the movable end of the switch assembly; the input end of the connecting pipe is connected to the piston cylinder, and the output end is connected to the sealing airbag.
[0008] Preferably, the switch assembly includes a pull rod, a C-shaped frame, an elastic element, a triangular block, a switch cylinder, and a linkage unit; the pull rod is installed outside the wall; the C-shaped frame is installed on the small end of the piston shaft; the two ends of the elastic element are respectively connected to the C-shaped frame and the triangular block; the two ends of the switch cylinder are respectively connected to the air-pushing assembly and the piston cylinder; and the linkage assembly is installed inside the wall and moves with the C-shaped frame.
[0009] Preferably, the linkage assembly includes a switch rod, a linkage plate, a first snap-fit plate, a second elastic element, a second snap-fit plate, and a tapered rod; the switch rod is sleeved inside the switch cylinder and located at the connection between the air-pushing assembly and the switch cylinder; the linkage plate connects to the switch rod; the first snap-fit plate is installed on the linkage plate; both ends of the second elastic element are connected to the wall and the second snap-fit plate, respectively; the second snap-fit plate is snapped into the first snap-fit plate; the tapered rod is installed on the outside of the C-shaped frame; the linkage plate is located on the moving path of the tapered rod.
[0010] Preferably, the thrust assembly includes a second piston cylinder, a first spring, a piston plate, and a first telescopic rod; the second piston cylinder is installed inside the wall and its bottom end is connected to the switch cylinder; the two ends of the first spring and the first telescopic rod are respectively connected to the piston plate and the second piston cylinder.
[0011] Preferably, the reciprocating assembly includes a second piston shaft, a third piston cylinder, an air inlet pipe, a one-way air inlet valve, and a one-way air outlet pipe; the third piston cylinder is installed inside the wall; the second piston shaft is elastically connected inside the third piston cylinder; the air inlet pipe is connected to the input end of the third piston cylinder, and the one-way air inlet valve is installed on the air inlet pipe; the two ends of the one-way air outlet pipe are respectively connected to the third piston cylinder and the second piston cylinder.
[0012] Preferably, the protective assembly includes a telescopic cylinder and a reciprocating plate; the telescopic cylinder is mounted on the wall; the reciprocating plate is connected to the telescopic cylinder and is connected to the piston shaft.
[0013] Preferably, the notification mechanism includes a spring cylinder, a round rod, a blind curtain, a pull cord, and a display cavity; the spring cylinder is installed inside the wall; the round rod is installed in the middle of the spring cylinder, one end of the blind curtain is connected to the round rod, and the other end is connected to the pull cord; the two ends of the pull cord are respectively connected to a piston plate and the blind curtain; the display cavity is installed on the wall, and the blind curtain is slidably connected inside the display cavity.
[0014] This invention further provides a method for constructing prefabricated building exterior walls, which uses the aforementioned prefabricated building exterior walls and is characterized by the following specific steps: S1. After the two walls are pushed together, the piston shaft moves in the inner cavity of the piston cylinder, causing the switch assembly to tighten the two walls. S2. Then the air inside the piston cylinder is pushed by the piston shaft and delivered to the sealing airbag, causing the sealing airbag to expand and fill the gap between the two walls. S3. Subsequently, the protective component drives the reciprocating component to move, continuously inputting air into the inner cavity of the piston cylinder, so that the air pressure in the inner cavity of the piston cylinder is sufficient, and the two walls are continuously tightened. S4. If either of the two walls becomes loose, the air in piston cylinder one returns to the thrust assembly. At this time, the warning mechanism can issue a warning based on the degree of looseness of the walls. Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: Insert the pull rod on one wall into the C-shaped frame inside the other wall. The pull rod is then engaged by the triangular block. Next, push the C-shaped frame a short distance towards piston cylinder one. At this point, the tapered rod pushes the linkage plate away from the C-shaped frame, thereby causing the switch rod to move away from the connection between piston cylinder two and the switch cylinder. This causes the air inside piston cylinder two to be pressed down by the piston plate at the bottom of spring one and telescopic rod one, thus pushing the air into piston cylinder one. This pushes piston shaft one towards the connection between piston cylinder one and the connecting pipe. At this time, piston shaft one drives the C-shaped frame to move, thereby continuously applying a force to pull the other wall, ensuring that the two walls remain tightly fitted.
[0015] Next, air from a pair of piston cylinders and an inner cavity through the piston shaft is introduced into the sealing airbag through the connecting pipe, thereby causing the sealing airbag to be squeezed against the surface of another wall, further ensuring that there is no gap between the two walls.
[0016] During daily use, the external wind blows onto the reciprocating plate, causing the piston shaft two to reciprocate within the inner cavity of the piston cylinder three. This draws external air into the piston cylinder three through the one-way air inlet valve, and then delivers the air to the piston cylinder one through the one-way air outlet pipe. This ensures that the piston cylinder one always has sufficient air, thus maintaining a high-pressure state and preventing the two walls from separating due to reduced air volume during prolonged use.
[0017] In daily use, due to the wind and the influence of surrounding construction, the other wall will pull the piston shaft one to move inside the piston cylinder one. Because of the pull of the other wall, the piston shaft one will push air into the piston cylinder two, thereby driving the piston plate in the inner cavity of the piston cylinder two to rise, which will release the curtain to descend in the display cavity, thus intuitively telling people the deviation between the two outer walls. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the pull rod proposed in this invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the piston cylinder II proposed in this invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the piston cylinder II proposed in this invention; Figure 8 For the present invention Figure 7 Enlarged view of point D; Reference numerals: 1. Wall; 2. Pull rod; 3. Piston cylinder one; 4. Piston shaft one; 5. C-shaped frame; 6. Elastic element one; 7. Triangular block; 8. Switch cylinder; 9. Piston cylinder two; 10. Switch rod; 11. Linkage plate; 12. Snap-on plate one; 13. Elastic element two; 14. Snap-on plate two; 15. Conical rod; 16. Spring one; 17. Piston plate; 18. Telescopic rod one; 19. Telescopic cylinder; 20. Reciprocating plate; 21. Piston shaft two; 22. Piston cylinder three; 23. Inlet pipe; 24. One-way inlet valve; 25. One-way outlet pipe; 26. Connecting pipe; 27. Sealing airbag; 28. Spring coil; 29. Round rod; 30. Shielding curtain; 31. Pull rope; 32. Display cavity. Detailed Implementation
[0019] Example 1, as Figures 1-8 As shown, the present invention proposes a prefabricated building exterior wall and its construction method, comprising a wall 1, and further comprising: a sealing mechanism installed inside the wall 1; a notification mechanism installed on the wall 1 and used to notify of the status of the wall 1; the sealing assembly comprising a sealing component, a switching component, a pushing component, a reciprocating component, and a protective component; the sealing component is installed inside the wall 1 and used to seal the gap between two walls 1; the switching component is installed inside the wall 1 and connects the pushing component and the sealing component; the pushing component is installed inside the wall 1 and delivers air to the sealing component when the switching component is open; the reciprocating component is installed on the wall 1, and its movable end moves with the protective component; the protective component is installed inside the wall 1 and used to protect the gap between two walls 1; the switching component is opened after being pushed by another wall 1, the pushing component pushes air into the sealing component, tightening the two walls 1, and the reciprocating component continuously delivers air into the sealing component.
[0020] The sealing assembly includes a piston cylinder 3, a piston shaft 4, a connecting pipe 26, and a sealing airbag 27. The piston cylinder 3 is installed inside the wall 1. The large end of the piston shaft 4 is sleeved inside the piston cylinder 3, and the small end is connected to the movable end of the switch assembly. The input end of the connecting pipe 26 is connected to the piston cylinder 3, and the output end is connected to the sealing airbag 27. When the piston shaft 4 connects to the piston cylinder 3 and the connecting pipe 26, the air inside the piston cylinder 3 is pushed into the connecting pipe 26 and then into the sealing airbag 27, so that the sealing airbag 27 is pressed against the surface of the other wall 1, thereby sealing the two walls 1.
[0021] The switch assembly includes a pull rod 2, a C-shaped frame 5, an elastic element 6, a triangular block 7, a switch cylinder 8, and a linkage unit. The pull rod 2 is installed outside the wall 1. The C-shaped frame 5 is installed on the small end of the piston shaft 4. The two ends of the elastic element 6 are respectively connected to the C-shaped frame 5 and the triangular block 7. The two ends of the switch cylinder 8 are respectively connected to the air-pushing assembly and the piston cylinder 3. The linkage assembly is installed inside the wall 1 and moves with the C-shaped frame 5. When two walls 1 are installed, another pull rod 2 is inserted into another C-shaped frame 5, so that the pull rod 2 is engaged with the triangular block 7. Then, the pull rod 2 is pulled by the triangular block 7 to tighten the two. The pull rod 2 is triangular. When the pull rod 2 is inserted between the two triangular blocks 7, it pushes the two triangular blocks 7 apart, and then the two triangular blocks 7 are engaged with the C-shaped frame 5.
[0022] The linkage assembly includes a switch rod 10, a linkage plate 11, a first snap-fit plate 12, a second elastic element 13, a second snap-fit plate 14, and a conical rod 15. The switch rod 10 is sleeved inside the switch cylinder 8 and is located at the connection between the air-pushing assembly and the switch cylinder 8. The linkage plate 11 connects to the switch rod 10. The first snap-fit plate 12 is installed on the linkage plate 11. The two ends of the second elastic element 13 are respectively connected to the wall 1 and the second snap-fit plate 14. The second snap-fit plate 14 is snapped with the first snap-fit plate 12. The conical rod 15 is installed on the outside of the C-shaped frame 5. The linkage plate 11 is located on the moving path of the conical rod 15. In the initial state, the switch rod 10 is located at the connection between the second piston cylinder 9 and the switch cylinder 8, blocking the air in the inner cavity of the second piston cylinder 9. When the pulling rod 2 is inserted into the C-shaped frame 5 and the C-shaped frame 5 is pushed a certain distance, the air in the inner cavity of the second piston cylinder 9 will be pushed into the first piston cylinder 3 under the pressure applied to the piston plate 17 by the first spring 16.
[0023] The air-pushing assembly includes piston cylinder 2 9, spring 16, piston plate 17, and telescopic rod 18. Piston cylinder 2 9 is installed inside wall 1 and its bottom end is connected to switch cylinder 8. The two ends of spring 16 and telescopic rod 18 are respectively connected to piston plate 17 and piston cylinder 2 9. Piston plate 17 is positioned and guided by telescopic rod 18, so that piston plate 17 can descend stably inside piston cylinder 2 9, thereby pushing out the air inside piston cylinder 2 9.
[0024] The reciprocating assembly includes piston shaft 21, piston cylinder 22, air inlet pipe 23, one-way air inlet valve 24, and one-way air outlet pipe 25. Piston cylinder 22 is installed inside wall 1. Piston shaft 21 is elastically connected inside piston cylinder 22. Air inlet pipe 23 is connected to the input end of piston cylinder 22, and one-way air inlet valve 24 is installed on air inlet pipe 23. The two ends of one-way air outlet pipe 25 are connected to piston cylinder 22 and piston cylinder 29, respectively. When the reciprocating plate 20 is subjected to strong wind, it drives piston shaft 21 to reciprocate. When piston shaft 21 moves in the direction of reciprocating plate 20 in the inner cavity of piston cylinder 22, it draws external air into piston cylinder 22 through one-way air inlet valve 24 and air inlet pipe 23. When piston shaft 21 moves in the direction of one-way air outlet pipe 25, it discharges the air in piston cylinder 22 into piston cylinder 3.
[0025] The protective assembly includes a telescopic cylinder 19 and a reciprocating plate 20; the telescopic cylinder 19 is installed on the wall 1; the reciprocating plate 20 is connected to the telescopic cylinder 19 and is connected to the piston shaft 21; the telescopic cylinder 19 and the reciprocating plate 20 protect the gap between the two walls 1, thereby ensuring the stability of the connection.
[0026] Example 2, as Figures 1-5 As shown, the present invention proposes a prefabricated building exterior wall and its construction method. Compared with Embodiment 1, the prompting mechanism in this embodiment includes a spring cylinder 28, a round rod 29, a blind curtain 30, a pull rope 31, and a display cavity 32. The spring cylinder 28 is installed inside the wall 1. The round rod 29 is installed in the middle of the spring cylinder 28. One end of the blind curtain 30 is connected to the round rod 29, and the other end is connected to the pull rope 31. The two ends of the pull rope 31 are respectively connected to the piston plate 17 and the blind curtain 30. The display cavity 32 is installed on the wall 1, and the blind curtain 30 is slidably connected inside the display cavity 32. The spring cylinder 28 is composed of a cylinder and a spring, with the spring installed inside the cylinder. The round rod 29 passes through the coil spring cylinder 28 and connects to the center of the coil spring; when the piston plate 17 descends in the inner cavity of the piston cylinder 2 9, it pulls the shielding curtain 30 up, which will completely block the display cavity 32. When the piston plate 17 subsequently rises in the piston cylinder 2 9, it will drive the shielding curtain 30 to descend in the display cavity 32, thereby allowing part of the display cavity 32 to be exposed, so that the user can observe the swaying amplitude between the two walls 1 according to how much of the display cavity 32 is exposed; this application is applicable to some lightweight houses that can be quickly assembled, etc.; the elastic element 1 6 and the elastic element 2 13 are composed of spring 2 and telescopic rod 2, with spring 2 set on the outer periphery of telescopic rod 2.
[0027] Example 3, as Figures 1-8 As shown, the present invention proposes a prefabricated building exterior wall construction method, which adopts a prefabricated building exterior wall as described in Example 2, and includes the following specific steps: S1. After pushing the two walls 1 together, the piston shaft 4 moves in the inner cavity of the piston cylinder 3, so that the switch assembly pulls the two walls 1 together. S2. Subsequently, the air inside the piston cylinder 3 is pushed by the piston shaft 4 and delivered to the sealing airbag 27, causing the sealing airbag 27 to expand and fill the gap between the two walls 1. S3. Subsequently, the protective component drives the reciprocating component to move, continuously inputting air into the inner cavity of piston cylinder 3, so that the air pressure in the inner cavity of piston cylinder 3 is sufficient, and the two walls 1 are continuously tightened. S4. If either of the two walls 1 becomes loose, the air in the piston cylinder 3 returns to the thrust assembly. At this time, the warning mechanism can issue a warning based on the degree of looseness of the walls 1. In summary, in this invention, the pull rod 2 on the other wall 1 is inserted into the C-shaped frame 5 of the other wall 1, the pull rod 2 is engaged with the two triangular blocks 7, and the C-shaped frame 5 is pushed a distance towards the piston cylinder 3, thereby driving the tapered rod 15 to push the linkage plate 11 a distance. At this time, through the engagement of the first locking plate 12 and the second locking plate 14, the pushed linkage plate 11 is locked by the second locking plate 14 and no longer moves, thereby causing the switch rod 10 to leave the connection between the switch cylinder 8 and the piston cylinder 9. At this time, the air in the inner cavity of the piston cylinder 9 is driven by the elasticity of the spring 16 to drive the piston plate 17 to descend, thereby pushing the air in the inner cavity of the piston cylinder 9 into the inner cavity of the piston cylinder 3 through the switch cylinder 8, thereby driving the piston shaft 4 to move towards the connection between the piston cylinder 3 and the connecting pipe 26. At this time, the piston shaft 4 is pulled by the C-shaped frame 5 to make the two walls 1 fit tightly together.
[0028] Next, the air inside the piston cylinder 3 is pushed to the connecting pipe 26 by the piston shaft 4, and then transported to the sealing airbag 27 along the connecting pipe 26, so that the sealing airbag 27 expands and fits between the two walls 1, further filling some irregular gaps between the two walls 1.
[0029] When the reciprocating plate 20 is blown by the strong wind, it moves back and forth, which in turn drives the piston shaft 21 to move back and forth in the piston cylinder 22. This draws in external air through the one-way intake valve 24 into the piston cylinder 22, and then outputs it to the piston cylinder 3 through the one-way exhaust pipe 25. This continuously increases the air pressure in the piston cylinder 3, allowing the piston shaft 4 to continuously tighten the two walls 1 as much as possible.
[0030] If the wall 1 is subjected to a large wind force, or if the wall 1 deviates due to ground vibration, it will drive the piston shaft 4 to move inside the piston cylinder 3, thereby pushing the air in the inner cavity of the piston cylinder 3 back into the piston cylinder 9. At this time, the piston plate 17 in the inner cavity of the piston cylinder 9 will rise and fall. When the piston plate 17 rises, it means that air has been input into the piston cylinder 9. At this time, the elasticity of the coil spring 28 drives the round rod 29 to rotate, thereby pulling down the curtain 30 in the inner cavity of the display cavity 32, thereby releasing the display cavity 32. The user can judge the range of motion of the wall 1 by how much the curtain 30 has fallen.
[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. A prefabricated building exterior wall, comprising a wall body (1), characterized in that, Also includes: A sealing mechanism, which is installed inside the wall (1); The notification mechanism is installed on the wall (1) and is used to notify the wall (1) of its status; The sealing assembly includes a sealing component, a switching component, a thrusting component, a reciprocating component, and a protective component; the sealing component is installed inside the wall (1) and is used to seal the gap between the two walls (1); the switching component is installed inside the wall (1) and connects the thrusting component and the sealing component; the thrusting component is installed inside the wall (1) and delivers air to the sealing component when the switching component is in operation; the reciprocating component is installed on the wall (1) and its movable end moves with the protective component; the protective component is installed inside the wall (1) and is used to protect the gap between the two walls (1); the switching component is pushed through by the other wall (1), the thrusting component pushes air into the sealing component, tightens the two walls (1), and the reciprocating component continuously delivers air into the sealing component.
2. The prefabricated building exterior wall according to claim 1, characterized in that, The sealing assembly includes piston cylinder 1 (3), piston shaft 1 (4), connecting pipe (26) and sealing airbag (27); piston cylinder 1 (3) is installed inside the wall (1); the large end of piston shaft 1 (4) is sleeved inside piston cylinder 1 (3), and the small end is connected to the movable end of the switch assembly; the input end of the connecting pipe (26) is connected to piston cylinder 1 (3), and the output end is connected to sealing airbag (27).
3. The prefabricated building exterior wall according to claim 2, characterized in that, The switch assembly includes a pull rod (2), a C-shaped frame (5), an elastic element (6), a triangular block (7), a switch cylinder (8), and a linkage unit; the pull rod (2) is installed outside the wall (1); the C-shaped frame (5) is installed on the small end of the piston shaft (4); the two ends of the elastic element (6) are connected to the C-shaped frame (5) and the triangular block (7) respectively; the two ends of the switch cylinder (8) are connected to the air-pushing assembly and the piston cylinder (3) respectively; the linkage assembly is installed inside the wall (1) and moves with the C-shaped frame (5).
4. A prefabricated building exterior wall according to claim 3, characterized in that, The linkage assembly includes a switch rod (10), a linkage plate (11), a first snap-fit plate (12), a second elastic element (13), a second snap-fit plate (14), and a tapered rod (15). The switch rod (10) is sleeved inside the switch cylinder (8) and located at the connection between the air-pushing assembly and the switch cylinder (8). The linkage plate (11) connects to the switch rod (10). The first snap-fit plate (12) is installed on the linkage plate (11). The two ends of the second elastic element (13) are connected to the wall (1) and the second snap-fit plate (14) respectively. The second snap-fit plate (14) snaps into the first snap-fit plate (12). The tapered rod (15) is installed on the outside of the C-shaped frame (5). The linkage plate (11) is located on the moving path of the tapered rod (15).
5. A prefabricated building exterior wall according to claim 4, characterized in that, The air thrust assembly includes piston cylinder two (9), spring one (16), piston plate (17) and telescopic rod one (18); piston cylinder two (9) is installed inside the wall (1) and its bottom end is connected to the switch cylinder (8); the two ends of spring one (16) and telescopic rod one (18) are respectively connected to piston plate (17) and piston cylinder two (9).
6. A prefabricated building exterior wall according to claim 5, characterized in that, The reciprocating assembly includes piston shaft two (21), piston cylinder three (22), air inlet pipe (23), one-way air inlet valve (24) and one-way air outlet pipe (25); piston cylinder three (22) is installed inside the wall (1); piston shaft two (21) is elastically connected inside piston cylinder three (22); air inlet pipe (23) is connected to the input end of piston cylinder three (22), and one-way air inlet valve (24) is installed on air inlet pipe (23); the two ends of one-way air outlet pipe (25) are respectively connected to piston cylinder three (22) and piston cylinder two (9).
7. A prefabricated building exterior wall according to claim 6, characterized in that, The protective assembly includes a telescopic cylinder (19) and a reciprocating plate (20); the telescopic cylinder (19) is mounted on the wall (1); the reciprocating plate (20) is connected to the telescopic cylinder (19) and is connected to the piston shaft (21).
8. A prefabricated building exterior wall according to claim 5, characterized in that, The notification mechanism includes a coil spring (28), a round rod (29), a blind curtain (30), a pull cord (31), and a display cavity (32); the coil spring (28) is installed inside the wall (1); the round rod (29) is installed in the middle of the coil spring (28), one end of the blind curtain (30) is connected to the round rod (29), and the other end is connected to the pull cord (31); the two ends of the pull cord (31) are respectively connected to the piston plate (17) and the blind curtain (30); the display cavity (32) is installed on the wall (1), and the blind curtain (30) is slidably connected inside the display cavity (32).
9. A method for constructing a prefabricated building exterior wall, using the prefabricated building exterior wall described in claim 2, characterized in that, The specific steps include the following: S1. After pushing the two walls (1) together, the piston shaft (4) moves in the inner cavity of the piston cylinder (3) so that the switch assembly pulls the two walls (1) together. S2. Then the air in the inner cavity of piston cylinder (3) is pushed by piston shaft (4) and delivered to the sealing airbag (27), so that the sealing airbag (27) expands and fills the gap between the two walls (1). S3. Subsequently, the protective component drives the reciprocating component to move, continuously inputting air into the inner cavity of piston cylinder 1 (3), so that the air pressure in the inner cavity of piston cylinder 1 (3) is sufficient, and the two walls (1) are continuously tightened. S4. If the two walls (1) become loose, the air in the piston cylinder (3) returns to the air-pushing assembly. At this time, the prompting mechanism can make a prompt based on the degree of looseness of the walls (1).