A device and method for internal ventilation of a prefabricated panel house in a construction site

Abstract

The application provides a device and method for internal ventilation of a construction site assembled board room, which comprises a main support structure, a vibration conversion mechanism arranged in the main support structure and an exhaust assembly, the vibration conversion mechanism is used for converting internal vibration of a building into mechanical energy, the vibration conversion mechanism and the exhaust assembly are in transmission connection, and the exhaust assembly works based on the mechanical energy; in the application, slight displacement generated by high-frequency vibration is amplified to generate mechanical energy through the vibration conversion mechanism, the mechanical energy is converted into kinetic energy capable of driving the exhaust assembly to work, and the exhaust assembly is driven to work, so that air inside the building is circulated, the application meets the demand of low-energy-consumption buildings, and meanwhile, the comfort of the building can be improved based on actual production needs.

Description

Technical Field

[0001] This invention relates to the field of building ventilation technology, specifically to a device and method for ventilation inside prefabricated modular houses on construction sites. Background Technology

[0002] Prefabricated modular houses, often referred to as mobile homes, are commonly used on construction sites for buildings, bridges, water conservancy projects, or new energy projects. These mobile homes are temporary structures because they only serve during the construction period. Furthermore, due to their manufacturing process, these prefabricated modular houses have good overall airtightness. In actual use, curtain walls are often installed on the exterior of the prefabricated modular houses; the cavity between the curtain wall and the modular house enhances its insulation and aesthetics.

[0003] These prefabricated houses have almost no ventilation capacity themselves, relying mainly on air conditioning and fresh air systems to achieve ventilation. However, when the prefabricated houses are not used for a certain period of time, the lack of ventilation allows moisture from the construction site to accumulate inside, easily leading to mold growth and strong odors. This significantly reduces the experience for people entering unventilated prefabricated houses. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a device and method for ventilation and air exchange inside prefabricated houses on construction sites, which can improve the air circulation inside the building through the vibration of the building itself.

[0005] This invention is achieved through the following technical solution:

[0006] A device for ventilation inside prefabricated modular houses on construction sites includes a main support structure and a vibration conversion mechanism and an exhaust assembly disposed within the main support structure. The vibration conversion mechanism is used to convert internal vibrations of the building into mechanical energy. The vibration conversion mechanism and the exhaust assembly are connected by transmission, and the exhaust assembly operates based on the mechanical energy.

[0007] Furthermore, the main support structure includes a base plate and two first side plates vertically spaced on the base plate.

[0008] Furthermore, at least one connecting plate is provided on the side wall of the first side plate, and the connecting plate is an L-shaped structure or a straight plate structure.

[0009] Furthermore, the vibration conversion mechanism includes a drive assembly and a conversion assembly. The drive assembly includes a drive plate and a force-bearing plate connected to the drive plate via a circular roller. The circular roller is disposed within the main support structure, and the force-bearing plate is embedded inside the building.

[0010] A first sleeve is fixedly installed at the free end of the drive plate, and a round shaft is inserted through the inside of the first sleeve.

[0011] Furthermore, the conversion component includes a sixth connecting arm horizontally disposed on the side wall of the main support structure near the circular shaft. The sixth connecting arm is hinged to a rotating connecting plate. The rotating connecting plate is slidably connected to the circular shaft via an arc-shaped groove. The arc-shaped groove is disposed on the connecting plate. A first transmission rod is hinged to the upper end of the rotating connecting plate.

[0012] The conversion assembly further includes a first connecting arm spaced apart on one side of the drive plate and fixedly mounted on the main support structure. The first connecting arm is provided with a first cam. The free end of the first cam is hinged to one end of an L-shaped transmission rod. The other end of the L-shaped transmission rod is hinged to the first transmission rod. The bent part of the L-shaped transmission rod is hinged to a second transmission rod. The other end of the second transmission rod is hinged to the first connecting arm.

[0013] The conversion assembly further includes a drive shaft, which is connected to the fixed end of the first cam via a first chain; the drive shaft is also connected to the exhaust assembly.

[0014] The sixth connecting arm, connecting plate, first transmission rod, L-shaped transmission rod, and second transmission rod together constitute a hinged linkage mechanism with pauses for the output swing arm.

[0015] Furthermore, when there is only one conversion component, a gear is fixedly sleeved on the shaft of the drive shaft, and the gear is connected to the first chain teeth;

[0016] When there are multiple conversion components, a one-way transmission gear is fixedly sleeved on the shaft of the transmission shaft, and the one-way transmission gear is connected to the first chain teeth.

[0017] Furthermore, when there are multiple conversion components, the conversion components are arranged alternately and each is connected to at least one exhaust component.

[0018] Furthermore, the exhaust assembly includes a drive device and an air pipe assembly, the drive device is connected to the vibration conversion mechanism, and the output end of the drive device is connected to the air pipe assembly;

[0019] The driving device includes a third connecting arm vertically arranged within the main support structure. The third connecting arm is provided with a fifth connecting arm and a fourth fixed gear. The fourth fixed gear is connected to a vibration conversion mechanism. The fifth connecting arm is rotatably provided with a fifth fixed gear. One end of the fourth fixed gear and the fifth fixed gear meshes. The other end of the fifth fixed gear is connected to a crank transmission mechanism. The output end of the crank transmission mechanism is connected to an air pipe assembly.

[0020] Furthermore, the air tube assembly includes a piston connected to the output end of the crank drive mechanism, the piston being sleeved in a piston sleeve, and the piston sleeve being sealed to an external pipe.

[0021] An air chamber is provided at the end of the external pipe away from the piston. The air chamber is located inside the roof, and a first air check valve is provided in the area covered by the air chamber on the roof. A second air check valve is provided on the side wall of the air chamber.

[0022] A method for using a ventilation device for prefabricated modular houses on construction sites includes the following steps:

[0023] The vibration conversion mechanism converts the vibration inside the building into mechanical energy, and then transmits the converted mechanical energy to the exhaust assembly. The exhaust assembly works based on the mechanical energy to complete ventilation.

[0024] Compared with the prior art, the present invention has the following beneficial technical effects:

[0025] This invention provides a device and method for ventilation inside prefabricated modular houses on construction sites, including a main support structure and a vibration conversion mechanism and an exhaust assembly disposed within the main support structure. The vibration conversion mechanism converts internal building vibrations into mechanical energy. The vibration conversion mechanism and the exhaust assembly are connected by a transmission, and the exhaust assembly operates based on the mechanical energy. In this application, no additional energy input is required. The vibration conversion mechanism amplifies the slight displacement generated by high-frequency vibrations to generate mechanical energy, which is then converted into kinetic energy capable of driving the exhaust assembly. This drives the exhaust assembly to operate, thereby creating air circulation inside the building. This application meets the requirements of low-energy buildings and can improve the comfort of buildings based on actual production needs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a ventilation device for prefabricated modular houses on construction sites according to the present invention.

[0027] Figure 2 This is a schematic diagram of a ventilation device for prefabricated modular houses on construction sites according to the present invention.

[0028] Figure 3 This is a schematic diagram of the exhaust assembly in a specific embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the hinge linkage mechanism with a pause in the output swing arm in a specific embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the connection between the driving component and the conversion component in a specific embodiment of the present invention;

[0031] Figure 6 This is a top view of an arrangement of vibration conversion mechanisms in a specific embodiment of the present invention;

[0032] Figure 7 This is a top view of another arrangement of vibration conversion mechanisms in a specific embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of a ventilation device in a prefabricated modular house for construction site ventilation according to the present invention.

[0034] Figure 9 This is a schematic diagram of the air chamber structure in a specific embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram showing the positions of the first connecting plate and the side plate in a specific embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram showing the positions of the second connecting plate and the side plate in a specific embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of a second embodiment of the force-bearing plate in a specific embodiment of the present invention.

[0038] In the diagram: 1. Base plate; 101. First side plate; 102. Top plate; 103. Floor; 104. Wall; 105. Roof; 106. Concrete pad; 107. Louver; 180. Sixth connecting arm; 194. Series reinforcing bars; 195. First through hole; 196. L-shaped connector; 197. Second through hole; 198. Connecting plate; 199. Second side plate; 2. Stiffening rib; 3. Drive plate; 301. Circular roller; 302. Load-bearing plate; 303. First connecting sleeve; 304. Circular shaft; 305. Rotating connecting plate; 3051. Arc-shaped groove; 4. Drive shaft; 5. First connecting arm; 501. 502. First cam; 502. First transmission rod; 5021. Second transmission rod; 5022. L-shaped transmission rod; 504. First chain; 6. Second connecting arm; 701. Third fixed gear; 702. Second chain; 703. Fourth fixed gear; 704. Third connecting arm; 705. Fifth fixed gear; 707. Crank transmission mechanism; 708. Piston; 709. Piston sleeve; 710. Fourth connecting arm; 711. External pipe; 712. Fifth connecting arm; 713. Air chamber; 714. Rainproof top cover; 715. Waterproof retaining ring; 716. First air check valve; 717. Second air check valve. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0040] To enable those skilled in the art to better understand the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] This invention provides a device for ventilation and air exchange inside prefabricated modular houses at construction sites, such as... Figure 1 and Figure 2 As shown, the structure includes a main support structure and a vibration conversion mechanism and an exhaust assembly disposed within the main support structure. The vibration conversion mechanism converts the construction vibrations experienced by the concrete pad under the prefabricated building into mechanical energy. The vibration conversion mechanism and the exhaust assembly are connected by a transmission, and the exhaust assembly operates based on the mechanical energy. It should be noted that the main support structure is relatively slidably disposed under the prefabricated building, allowing the concrete pad to undergo relative vertical displacement with the main support structure during vibration. Specifically, a gap is provided between the sidewall of the main support structure and the adjacent concrete sidewall. Those skilled in the art can coat the sidewall of the main support structure with materials such as lubricating oil or other suitable materials. Using water to absorb the plastic wrap reduces friction and minimizes the adhesion and slippage between the concrete and the main supporting structure, facilitating the later recycling of the device. It should be further noted that the high-frequency vibration described in this application is applicable in scenarios including: construction, new energy, water conservancy, and municipal engineering projects where a large number of soil compaction machines are used for construction; the vibrations of these machines will be transmitted to the concrete subfloor of nearby prefabricated houses. Another example is construction, water conservancy, municipal, and bridge engineering projects that require drilling machines; when high-powered drilling machines operate on hard rock or buildings, the machine vibrations will also be transmitted to the concrete subfloor of nearby prefabricated houses.

[0043] Preferred, such as Figure 10 and Figure 11 As shown, the main support structure includes a base plate 1 and two first side plates 101 vertically spaced on the base plate 1. Further, each of the first side plates 101 has at least one connecting plate on its sidewall. The connecting plate is either an L-shaped structure or a straight plate structure. It should be noted that if the main support structure of this application is located under the hollow square steel pipe beam of the prefabricated house, the connecting plate is a straight plate structure; if the main support structure of this application is located under the floor 103 of the prefabricated house, the connecting plate is an L-shaped structure. Those skilled in the art can fasten the connection with bolts in both cases. In this embodiment, the connecting plate includes an L-shaped connector 196 and a straight plate... The connecting plate 198 is provided with an L-shaped connector 196 and a first through hole 195. The straight connecting plate 198 is provided with a second through hole 197. Both the first through hole 195 and the second through hole 197 are used for detachable connection to the building body. Furthermore, in this embodiment, the main support structure also includes a second side plate 199 provided at the ends of the two first side plates 101, and an upper top plate 102 provided at the top of the two first side plates 101. The upper top plate 102 is provided with a through hole for passing through an external pipe 711. Furthermore, those skilled in the art can provide stiffening ribs 2 on the outer wall of the first side plate 101 to improve the stability of the main support structure.

[0044] Preferably, the vibration conversion mechanism includes a drive assembly and a conversion assembly. The drive assembly includes a drive plate 3 and a force-bearing plate 302 connected to the drive plate 3 via a circular roller 301. The circular roller 301 is disposed within the main support structure, and the force-bearing plate 302 is embedded in the concrete pad layer under the prefabricated house. A first sleeve 303 is fixedly disposed at the free end of the drive plate 3, and a circular shaft 304 is fixedly disposed through the inside of the first sleeve 303. It should be noted that, in this embodiment, the force-bearing plate 302 is preferably an isosceles trapezoidal structure and a rigid plate with a certain toughness. This is to make the bonding area of ​​the concrete larger, so as to absorb more vibration energy transmitted by construction machinery to the concrete pad layer under the prefabricated house. It should be noted that, in this application, the main support structure needs to be embedded in a predetermined position first, and then the concrete pad layer 106 is poured. When the vibration of the construction site is transmitted to the concrete pad layer 106, it will cause small-amplitude and high-frequency vibration, which will drive the force-bearing plate 302 embedded in the concrete pad layer 106 to swing around the circular roller 301.

[0045] Furthermore, such as Figure 4 , Figure 5 and Figure 6As shown, the conversion assembly includes a sixth connecting arm 180 vertically disposed on the side wall of the main support structure near the circular shaft 304. The sixth connecting arm 180 is hinged to a rotating connecting plate 305. The rotating connecting plate 305 is slidably connected to the circular shaft 304 via an arc-shaped sliding groove 3051. The arc-shaped sliding groove 3051 is disposed on the connecting plate 305. A first transmission rod 502 is hinged to the upper end of the rotating connecting plate 305. The conversion assembly also includes a first connecting arm 5 spaced apart on one side of the drive plate 3 and fixedly disposed on the main support structure. A first cam 501 is disposed on the first connecting arm 5. One end of an L-shaped transmission rod 5022 is hinged to the free end of the first cam 501, and the other end of the L-shaped transmission rod 5022 is hinged to... The first transmission rod 502, the bent portion of the L-shaped transmission rod 5022 is hinged to the second transmission rod 5021, and the other end of the second transmission rod 5021 is hinged to the first connecting arm 5; the conversion assembly also includes a transmission shaft 4, which is connected to the cylindrical structure of the fixed end of the first cam 501 via a first chain 504; the transmission shaft 4 is connected to the exhaust assembly; the sixth connecting arm 180, the connecting plate 305, the first transmission rod 502, the L-shaped transmission rod 5022 and the second transmission rod 5021 together constitute a hinged linkage mechanism with pauses in the output swing arm. It should be noted that, in this application, the actual output of the hinged linkage mechanism with pauses in the output swing arm is a periodic circular motion trajectory.

[0046] Furthermore, when there is only one conversion component, a gear is fixedly sleeved on the shaft of the drive shaft 4, and the gear is connected to the teeth of the first chain 504; when there are multiple conversion components, a one-way transmission gear is fixedly sleeved on the shaft of the drive shaft 4, and the one-way transmission gear is connected to the teeth of the first chain 504; it should be noted that in this application, at least one conversion component is provided for the conversion of mechanical energy. However, for prefabricated houses with large shapes, those skilled in the art can set the number according to actual production needs. When there are many conversion components, since the drive components cannot achieve resonance at the same frequency, the output speeds and other conditions of multiple conversion components are different. Therefore, the one-way transmission gear is used to prevent the drive shaft 4 from having a hinged linkage mechanism that stops the output swing arm, thus preventing the reverse transmission of kinetic energy; it should be noted that, as Figure 12 As shown, those skilled in the art can weld the same series of reinforcing bars 194 to the load-bearing plates 302 on the same side to ensure that the rotation amplitude of all load-bearing plates 302 on the same row is the same; it should be further explained that the transmission shaft 4 can be set on the side wall of the main support structure through the second connecting arm 6, and the second connecting arm 6 and the transmission shaft 4 can rotate relative to each other.

[0047] Preferred, such as Figure 7As shown, when there are multiple conversion components, the conversion components are staggered and each is connected to at least one exhaust component. When the prefabricated house is large, the staggered arrangement can provide more power to the exhaust components per unit time.

[0048] Preferred, such as Figure 3 and Figure 6 As shown, the exhaust assembly includes a drive device and an air pipe assembly. The drive device is connected to the vibration conversion mechanism, and the output end of the drive device is connected to the air pipe assembly.

[0049] The driving device includes a third connecting arm 704 vertically disposed within the main support structure. The third connecting arm 704 is provided with a fifth connecting arm 712 and a fourth fixed gear 703. The fourth fixed gear 703 is connected to a vibration conversion mechanism. The fifth connecting arm 712 is rotatably connected to a fifth fixed gear 705. One end of the fourth fixed gear 703 and the fifth fixed gear 705 meshes, and the other end of the fifth fixed gear 705 is connected to a crank transmission mechanism 707. The output end of the crank transmission mechanism 707 is connected to an air pipe assembly. It should be noted that the fourth fixed gear 703... 03 and the fifth fixed gear 705 are compatible bevel gears. Meanwhile, the fourth fixed gear 703 has a rod-shaped structure with a gear on its rod body. This gear is connected to the drive shaft 4 via the second chain 702. Specifically, the drive shaft 4 is equipped with a third fixed gear 701, and the second chain 702 is connected to the third fixed gear 701. It should be noted that those skilled in the art can set the transmission ratio between the rod gear of the fourth fixed gear 703 and the drive shaft 4 according to actual production needs, so as to control the relative speed, adjust the frequency of the input piston 708, and control the ventilation efficiency.

[0050] Furthermore, the air pipe assembly includes a piston 708 connected to the output end of the crank transmission mechanism 707. The piston 708 is disposed inside a piston sleeve 709, and the piston sleeve 709 is sealed to an external pipe 711. It should be noted that a fourth connecting arm 710 is provided at the bottom of the external pipe 711. The fourth connecting arm 710 is used to support and adjust the relative position of the external pipe 711 and the crank transmission mechanism 707. The fourth connecting arm 710 is disposed on the main support structure.

[0051] like Figure 8 and Figure 9As shown, an air chamber 713 is provided at the end of the external pipe 711 away from the piston 708. The air chamber is located under the roof 105, and a first air check valve 716 is provided in the area covered by the air chamber 713 on the roof 105. A second air check valve 717 is provided on the side wall of the air chamber 713. In this embodiment, at least one louver 107 is also required on the wall 104 of the building body to balance the normal pressure inside the building body. At the same time, multiple first air check valves 716 and second air check valves 717 can be provided to enable faster opening and closing speeds, which is convenient for coordinating with the rapid periodic operation of the piston 708. It should be further noted that a rainproof cover 714 is provided on the outside of the first air check valve 716, and a waterproof retaining ring 715 is provided around the outer edge of the first air check valve 716 on the roof 105.

[0052] This invention provides a method for a ventilation system for prefabricated modular houses on construction sites, comprising the following steps:

[0053] The vibration conversion mechanism converts the vibration of the concrete pad under the prefabricated house into mechanical energy, and then transmits the converted mechanical energy to the exhaust assembly. The exhaust assembly works based on the mechanical energy to complete ventilation.

[0054] Specifically, the force plate 302 is subjected to vibration, which is transmitted in the opposite direction to the drive plate 3 via the circular roller 301. During this process, the swing amplitude of the force plate 302 can be amplified by the lever principle. Then, the drive plate 3 drives the circular shaft 304 to reciprocate in the arc-shaped slide groove 3051. At this time, the rotating connecting plate 305 swings, which drives the output rocker arm to generate a periodic circular motion trajectory through the hinge linkage mechanism with pauses. This drives the first cam 501 to rotate. The first cam 501 drives the transmission shaft 4 to rotate through the first chain 504. This process ultimately amplifies the power output of the force plate 302 to the first cam 501. Finally, the transmission shaft 4 transmits the kinetic energy to the piston 708 through the second chain 702 and the crank transmission mechanism 707, realizing the kinetic energy input to the exhaust assembly.

[0055] After kinetic energy is input to the exhaust assembly, it drives the piston 708 to reciprocate within the piston sleeve 709. When the piston 708 moves away from the external pipe 711, the valve of the second air check valve 717 on the air chamber 713 opens, drawing air from the building into the air chamber 713. During this process, the first air check valve 716 remains closed. Simultaneously, the missing air in the building is instantly replenished through the louvers 107 under atmospheric pressure. When the piston 708 approaches the external pipe 711, the valve on the first air check valve 716 opens, and the second air check valve 717 closes, expelling the air just drawn into the air chamber 713 to the outside, completing one ventilation cycle.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for ventilation and air exchange inside prefabricated modular houses at construction sites, characterized in that, The structure includes a main support structure and a vibration conversion mechanism and an exhaust assembly disposed within the main support structure. The vibration conversion mechanism is used to convert the vibration inside the building into mechanical energy. The vibration conversion mechanism and the exhaust assembly are connected by transmission, and the exhaust assembly works based on the mechanical energy. The vibration conversion mechanism includes a drive assembly and a conversion assembly. The drive assembly includes a drive plate (3) and a force-bearing plate (302) connected to the drive plate (3) via a circular roller (301). The circular roller (301) is disposed within the main support structure, and the force-bearing plate (302) is embedded inside the building. The drive plate (3) has a first sleeve (303) fixedly installed at its free end, and a round shaft (304) is installed through the inside of the first sleeve (303). The conversion assembly includes a sixth connecting arm (180) horizontally disposed on the side wall of the main support structure near the circular shaft (304). The sixth connecting arm (180) is hinged to a rotating connecting plate (305). The rotating connecting plate (305) is slidably connected to the circular shaft (304) via an arc-shaped sliding groove (3051). The arc-shaped sliding groove (3051) is disposed on the rotating connecting plate (305). A first transmission rod (502) is hinged to the upper end of the rotating connecting plate (305). The conversion assembly further includes a first connecting arm (5) spaced apart on one side of the drive plate (3) and fixedly mounted on the main support structure. A first cam (501) is provided on the first connecting arm (5). One end of an L-shaped transmission rod (5022) is hinged to the free end of the first cam (501). The other end of the L-shaped transmission rod (5022) is hinged to the first transmission rod (502). A second transmission rod (5021) is hinged to the bent part of the L-shaped transmission rod (5022). The other end of the second transmission rod (5021) is hinged to the first connecting arm (5). The conversion assembly also includes a drive shaft (4), which is connected to the fixed end of the first cam (501) via a first chain (504); the drive shaft (4) is also connected to the exhaust assembly. The sixth connecting arm (180), connecting plate (305), first transmission rod (502), L-shaped transmission rod (5022), and second transmission rod (5021) together constitute a hinge linkage mechanism with a pause in the output swing arm. The exhaust assembly includes a drive device and an air pipe assembly. The drive device is connected to the vibration conversion mechanism, and the output end of the drive device is connected to the air pipe assembly. The drive device includes a third connecting arm (704) vertically arranged within the main support structure. The third connecting arm (704) is provided with a fifth connecting arm (712) and a fourth fixed gear (703). The fourth fixed gear (703) is connected to the vibration conversion mechanism. The fifth connecting arm (712) is rotatably provided with a fifth fixed gear (705). One end of the fourth fixed gear (703) and the fifth fixed gear (705) meshes. The other end of the fifth fixed gear (705) is connected to a crank transmission mechanism (707). The output end of the crank transmission mechanism (707) is connected to an air pipe assembly.

2. The device for ventilation and air exchange inside prefabricated modular houses at construction sites according to claim 1, characterized in that, The main support structure includes a base plate (1) and two first side plates (101) that are vertically spaced on the base plate (1).

3. The device for ventilation and air exchange inside prefabricated modular houses at construction sites according to claim 2, characterized in that, The first side plate (101) has at least one connecting plate on its side wall, and the connecting plate is an L-shaped structure or a straight plate structure.

4. The device for ventilation and air exchange inside prefabricated modular houses at construction sites according to claim 1, characterized in that, The conversion component is one, and the transmission shaft (4) is fixedly fitted with a gear, which is connected to the teeth of the first chain (504).

5. The device for ventilation and air exchange inside prefabricated modular houses at construction sites according to claim 1, characterized in that, The conversion components are multiple, and the shaft body of the transmission shaft (4) is fixedly fitted with a one-way transmission gear. The one-way transmission gear is connected to the teeth of the first chain (504). The conversion components are arranged alternately and are respectively connected to at least one exhaust component.

6. The device for ventilation and air exchange inside prefabricated modular houses at construction sites according to claim 1, characterized in that, The air tube assembly includes a piston (708) connected to the output end of the crank drive mechanism (707), the piston (708) being sleeved on a piston sleeve (709), and the piston sleeve (709) being sealed to an external pipe (711). An air chamber (713) is provided at the end of the external pipe (711) away from the piston (708). The air chamber (713) is located inside the roof (105), and a first air check valve (716) is provided in the area covered by the air chamber (713) on the roof (105). A second air check valve (717) is provided on the side wall of the air chamber (713).

7. A method for using a ventilation device for prefabricated modular houses on construction sites, characterized in that, A ventilation device for prefabricated modular houses on construction sites, as described in any one of claims 1-6, comprises the following steps: The vibration conversion mechanism converts the vibration inside the building into mechanical energy, and then transmits the converted mechanical energy to the exhaust assembly. The exhaust assembly works based on the mechanical energy to complete ventilation.

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