Ventilation system of prefabricated cabin

Abstract

The invention discloses a prefabricated cabin ventilation system, which relates to the technical field of prefabricated cabins, and comprises a centralized ventilation room and a prefabricated cabin, the centralized ventilation room is provided with a ventilation shutter, and the ventilation shutter is provided with a coarse filtering piece; the centralized ventilation room is connected with the foundation through a ventilation room foundation, a ventilation shaft is arranged in the ventilation room foundation, and the ventilation shaft is communicated with the centralized ventilation room; the prefabricated cabin is connected with a foundation through a prefabricated cabin foundation, a precise filtering piece is arranged between the prefabricated cabin and the prefabricated cabin foundation, and the prefabricated cabin is provided with an air outlet assembly; an inner cavity of the prefabricated cabin foundation is communicated with the ventilating shaft through a transverse ventilating shaft, and a medium-efficiency filtering piece is arranged between the transverse ventilating shaft and the ventilating shaft; the transverse ventilation shaft is provided with a water spray dust suppression mechanism and a dust particle detector, the dust particle detector is used for detecting the amount of sand and dust in the transverse ventilation shaft, and the water spray dust suppression mechanism is used for suppressing the sand and dust in the transverse ventilation shaft. Based on the scheme, the ventilation and sand prevention effects of the prefabricated cabin are improved.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated cabins, and in particular to a prefabricated cabin ventilation system. Background Art

[0002] With the advancement of power construction, prefabricated cabins, as a carrier of power equipment, play an important role in shortening the construction period. Since the electrical equipment in the prefabricated cabin will generate heat during operation, in order to prevent the power equipment from being damaged by heat, the prefabricated cabin needs to be ventilated and cooled.

[0003] When used in high wind and sand areas such as the Gobi Desert, in order to meet the requirements of ventilation and heat dissipation, the existing prefabricated cabins will have air inlets and outlets on the cabin walls. Figure 1 and Figure 2 As shown, "shutters + filters" or "fan air valve + filters + dust covers" are usually set at the air inlet, and "fan air valve + filters + dust covers" are set at the air outlet. Although the filter design is used to prevent wind and sand from entering the prefabricated cabin, in the above scheme, if the filter adopts a coarse filter, the effect of filtering wind and sand is poor, thereby affecting the safe operation of electrical equipment. If the filter adopts a fine filter, although the effect of filtering wind and sand is relatively improved, the filter is easily blocked by wind and sand, thereby affecting the ventilation volume. Therefore, the ventilation and sand prevention effect of the prefabricated cabin needs to be improved. Summary of the invention

[0004] The invention provides a prefabricated cabin ventilation system, which improves the technical problem of low ventilation and sand prevention effect of the existing prefabricated cabin.

[0005] The present invention provides a prefabricated cabin ventilation system, comprising: a centralized ventilation room and a prefabricated cabin;

[0006] The centralized ventilation room is provided with ventilation louvers, and the ventilation louvers are provided with coarse-effect filters;

[0007] The centralized ventilation room is connected to the foundation through a ventilation room foundation, a ventilation shaft is arranged in the ventilation room foundation, and the ventilation shaft is connected to the centralized ventilation room;

[0008] The prefabricated cabin is connected to the foundation through a prefabricated cabin foundation, a precision filter is provided between the prefabricated cabin and the prefabricated cabin foundation, and the prefabricated cabin is provided with an air outlet assembly;

[0009] The inner cavity of the prefabricated cabin foundation is connected to the ventilation shaft through a transverse ventilation shaft, and a medium-efficiency filter is arranged between the transverse ventilation shaft and the ventilation shaft;

[0010] The transverse ventilation shaft is provided with a water spray dust suppression mechanism and a dust particle detector. The dust particle detector is used to detect the amount of sand and dust inside the transverse ventilation shaft, and the water spray dust suppression mechanism is used to suppress sand and dust inside the transverse ventilation shaft.

[0011] Optionally, the water spray dust suppression mechanism includes a water pipe, a water tank and an atomizer;

[0012] The water delivery pipe is connected to the atomizer through the water tank;

[0013] The atomizer faces the interior of the transverse ventilation shaft.

[0014] Optionally, the volume ratio of the transverse ventilation shaft to the inner cavity is 8:225.

[0015] Optionally, a vibrator is provided on the medium-efficiency filter element.

[0016] Optionally, the bottom of the transverse ventilation shaft is higher than the bottom of the vertical ventilation shaft.

[0017] Optionally, the ventilation room foundation is provided with an inspection door;

[0018] A ventilation inspection ladder is provided below the inspection door;

[0019] A sand receiving pool is arranged at the bottom of the ventilation shaft.

[0020] Optionally, an air inlet valve is provided between the precision filter element and the prefabricated cabin foundation.

[0021] Optionally, the air outlet assembly includes an air outlet filter and a fan air valve component;

[0022] The fan air valve component is arranged outside the air outlet filter component, and a dust cover is arranged outside the fan air valve component;

[0023] The fan air valve component includes a fan and an air outlet air valve. The fan is used to discharge the air inside the prefabricated cabin to the outside, and the air outlet air valve is used to adjust the air outlet volume in the prefabricated cabin.

[0024] Optionally, a mobile maintenance ladder is further included; the mobile maintenance ladder includes a platform and a ladder frame;

[0025] A platform guardrail is disposed at a first end of the platform, and a second end of the platform is connected to a first end of the ladder frame;

[0026] A ladder guardrail is arranged at the second end of the ladder frame, and a universal rotating shaft wheel is arranged at the third end of the ladder frame.

[0027] Optionally, it further comprises a high-pressure air gun box; the high-pressure air gun box comprises a high-pressure air gun and a box body;

[0028] The box is used to house the filter element to be cleaned;

[0029] The high-pressure air gun is used for cleaning the filter element.

[0030] It can be seen from the above technical solutions that the present invention has the following advantages:

[0031] The present invention provides a prefabricated cabin ventilation system, including a centralized ventilation room and a prefabricated cabin; the centralized ventilation room is provided with ventilation louvers, and the ventilation louvers are provided with coarse-effect filters; the centralized ventilation room is connected to the foundation through the ventilation room foundation, and a ventilation shaft is provided in the ventilation room foundation, and the ventilation shaft is connected to the centralized ventilation room; the prefabricated cabin is connected to the foundation through the prefabricated cabin foundation, and a precision filter is provided between the prefabricated cabin and the prefabricated cabin foundation, and the prefabricated cabin is provided with an air outlet assembly; the inner cavity of the prefabricated cabin foundation is connected to the ventilation shaft through a transverse ventilation shaft, and a medium-efficiency filter is provided between the transverse ventilation shaft and the ventilation shaft; the transverse ventilation shaft is provided with a water spray dust suppression mechanism and a dust particle detector, the dust particle detector is used to detect the amount of sand and dust inside the transverse ventilation shaft, and the water spray dust suppression mechanism is used to suppress the sand and dust inside the transverse ventilation shaft. Based on the above scheme, the prefabricated cabin adopts a centralized air intake and multiple filtration design, and integrates natural sedimentation and water spray dust suppression structures to achieve air intake ventilation, thereby improving the ventilation and sand prevention effect of the prefabricated cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a structural schematic diagram of a traditional prefabricated cabin ventilation and sand prevention technical solution in the prior art;

[0034] Figure 2 It is a structural schematic diagram of another traditional prefabricated cabin ventilation and sand prevention technical solution in the prior art;

[0035] Figure 3 A schematic structural diagram of a prefabricated cabin ventilation system provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the structure of a mobile maintenance ladder provided in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of a high-pressure air gun box provided in an embodiment of the present invention Figure 1 ;

[0038] Figure 6 A schematic diagram of the structure of a high-pressure air gun box provided in an embodiment of the present invention Figure 2 ;

[0039] Figure 7 A schematic diagram of a combination of a medium-efficiency filter element and a vibrator provided in an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of the structure of a water spray dust suppression mechanism provided by an embodiment of the present invention;

[0041] In the figure: 1. Foundation; 2. Ventilation louvers; 3. Coarse-effect filter element; 4. Centralized ventilation room; 5. Ventilation room foundation; 6. Inspection door; 7. Ventilation inspection ladder; 8. Sand receiving pool; 9. Mobile inspection ladder; 901. Platform guardrail; 902. Platform; 903. Ladder guardrail; 904. Ladder frame; 905. Universal swivel wheel; 10. High-pressure air gun box; 1001. High-pressure air gun; 1002. Box body; 11. Medium-efficiency filter element; 1101. Vibrator; 12. Water spray dust suppression mechanism; 1201. Water pipe; 1202. Water tank; 1203. Atomizer; 13. Horizontal ventilation shaft; 14. Prefabricated cabin; 15. Outlet filter element; 16. Fan air valve element; 17. Dust cover; 18. Precision filter element; 19. Inlet air valve; 20. Prefabricated cabin foundation. DETAILED DESCRIPTION

[0042] The embodiment of the present invention provides a prefabricated cabin ventilation system, which is used to improve the technical problem of low ventilation and sand prevention effect of the existing prefabricated cabin.

[0043] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 3 , one embodiment of the present invention provides a prefabricated cabin ventilation system, comprising: a centralized ventilation room 4 and a prefabricated cabin 14;

[0045] The centralized ventilation room 4 is provided with ventilation louvers, and the ventilation louvers are provided with coarse-effect filters;

[0046] The centralized ventilation room 4 is connected to the foundation 1 through the ventilation room foundation 5. A ventilation shaft is arranged in the ventilation room foundation 5, and the ventilation shaft is connected to the centralized ventilation room 4;

[0047] The prefabricated cabin 14 is connected to the foundation 1 through the prefabricated cabin foundation 20. A precision filter 18 is provided between the prefabricated cabin 14 and the prefabricated cabin foundation 20. The prefabricated cabin 14 is provided with an air outlet assembly.

[0048] The inner cavity of the prefabricated cabin foundation 20 is connected to the ventilation shaft through the transverse ventilation shaft 13, and a medium-efficiency filter element 11 is arranged between the transverse ventilation shaft 13 and the ventilation shaft;

[0049] The transverse ventilation shaft 13 is provided with a water spray dust suppression mechanism 12 and a dust particle detector. The dust particle detector is used to detect the amount of sand and dust inside the transverse ventilation shaft 13 , and the water spray dust suppression mechanism 12 is used to suppress sand and dust inside the transverse ventilation shaft 13 .

[0050] In this embodiment, the prefabricated cabin ventilation system is provided with an air inlet structure and an air outlet structure of the prefabricated cabin 14, wherein the air outlet structure is an air outlet component provided on the prefabricated cabin 14, and is used to guide the air in the prefabricated cabin 14 out to the outside. The air inlet structure can be divided into a coarse-effect filtration area, a medium-effect filtration area and a fine-effect filtration area according to the order in which the wind and sand pass and the filtration and wind and sand prevention level;

[0051] A centralized ventilation room 4 is provided in the coarse-effect filtration area, and the centralized air inlet design can reduce the maintenance workload caused by the dispersed air inlet positions; and the centralized ventilation room 4 provides an installation foundation connected to the foundation 1 through the ventilation room foundation 5. Therefore, the height of the centralized ventilation room 4 can be adjusted based on the ventilation room foundation 5 according to the spatial distribution characteristics of the dust in the local environment, so that the centralized ventilation room can be set in a spatial environment with a smaller dust density, thereby reducing the dust from entering the coarse-effect filtration area; at the same time, the centralized ventilation room 4 is provided with ventilation louvers, and coarse-effect filter elements are provided on the ventilation louvers, which can achieve preliminary filtration of the dust, for example, filtering out dust with larger particle diameters. In a preferred design of the present structure, multiple groups of ventilation louvers are provided and distributed around the centralized ventilation room 4; a ventilation shaft is provided in the ventilation room foundation 5, and the ventilation shaft is connected to the centralized ventilation room 4. Part of the dust that has been initially filtered by the coarse-effect filter element will settle at the bottom of the ventilation shaft, which can reduce the amount of dust entering the medium-efficiency filtration area;

[0052] A transverse ventilation shaft 13 is provided in the medium-efficiency filtration area. The transverse ventilation shaft 13 is connected to the ventilation shaft and is provided with a medium-efficiency filter element 11. The medium-efficiency filter element 11 can filter the dust with medium particle diameter again to reduce the dust entering the medium-efficiency filtration area. At the same time, a dust particle detector is provided in the transverse ventilation shaft 13 to detect whether the amount of dust in the transverse ventilation shaft 13 exceeds the dust amount threshold. In addition, corresponding sensors such as temperature and humidity sensors can be considered to detect the dust, so as to conduct comprehensive data analysis to determine whether the amount of dust exceeds the dust amount threshold. When it is determined that the transverse ventilation shaft 13 has a large particle diameter, the dust particle detector can be used to detect the dust. When the amount of sand and dust in the air shaft 13 exceeds the threshold value of the amount of sand and dust, water mist is sprayed into the ventilation shaft 13 by starting the water spray dust suppression mechanism 12. At this time, part of the sand and dust is easy to settle due to the effect of the water mist, and the increase in the humidity of the incoming air also reduces static electricity, which is beneficial to protecting the operating safety of the electrical equipment in the prefabricated cabin 14 during the ventilation process; the prefabricated cabin foundation 20 is used as an installation foundation connecting the prefabricated cabin 14 and the foundation 1. An inner cavity is provided in the prefabricated cabin foundation 20, and the inner cavity is connected to the transverse ventilation shaft 13 to form an air duct in the medium-efficiency filtration area. The sand and dust flowing through the transverse ventilation shaft 13 can settle naturally in the inner cavity;

[0053] A precision filter element 18 is provided in the precision filtering area, and the precision filter element 18 is located between the prefabricated cabin 14 and the prefabricated cabin foundation 20 to filter the sand and dust with smaller particle diameters;

[0054] Based on the above scheme, the prefabricated cabin adopts a centralized air intake and multiple filtration design, and integrates natural sedimentation and water spray dust suppression designs to achieve air intake and ventilation. The daily maintenance workload is small, and it helps to achieve clean air entering the prefabricated cabin, thereby improving the ventilation and sand prevention effects of the prefabricated cabin and providing a safe and reliable environment for the electrical equipment inside the prefabricated cabin.

[0055] In a specific implementation of this embodiment, refer to Figure 1 The ventilation room foundation 5 is provided with an inspection door 6; a ventilation inspection ladder 7 is provided below the inspection door 6; and a sand receiving pool 8 is provided at the bottom of the ventilation shaft.

[0056] In this embodiment, an inspection door 6 is provided in the ventilation room foundation 5 so that the staff can enter and clean the sand and dust deposited at the bottom of the ventilation shaft and the transverse ventilation shaft 13. A ventilation inspection ladder 7 is provided below the inspection door 6 to enhance the walking convenience of the staff. At the same time, a sand receiving pool 8 is provided at the bottom of the ventilation shaft to centrally store sand and dust for centralized treatment. In one implementation, the sand and dust in the prefabricated cabin foundation 20 can be cleaned by entering the transverse ventilation shaft 13 into the prefabricated cabin foundation 20. In another implementation, a manhole can be provided between the prefabricated cabin 14 and the prefabricated cabin foundation 20 to facilitate entry and cleaning.

[0057] In a specific implementation of this embodiment, refer to Figure 1 , the bottom of the transverse ventilation shaft 13 is higher than the bottom of the ventilation shaft.

[0058] In this embodiment, the bottom of the transverse ventilation shaft 13 is set higher than the bottom of the ventilation shaft, so that the sand and dust in the transverse ventilation shaft 13 and the ventilation shaft can be placed in separate areas, and the sand and dust in the ventilation shaft is not easy to clog the medium-efficiency filter element 11 and affect the ventilation volume.

[0059] In a specific implementation of this embodiment, refer to Figure 7 A vibrator 1101 is provided on the medium-efficiency filter element 11 .

[0060] In this embodiment, a vibrator 1101 is provided on the medium-efficiency filter element 11, which can remove the sand and dust attached to the medium-efficiency filter element 11 in time to ensure the cleanliness and ventilation effect of the medium-efficiency filter element 11. In a preferred design of this structure, the vibrator 1101 can be a timed vibrator, which automatically starts at a set time interval. The automated design can ensure reliable operation of dust removal.

[0061] In a specific implementation of this embodiment, refer to Figure 8 , the water spray dust suppression mechanism 12 includes a water pipe 1201, a water tank 1202 and an atomizer 1203;

[0062] The water pipe 1201 is arranged to penetrate the horizontal ventilation shaft 13, and the water pipe 1201 is connected with the atomizer 1203 through the water tank 1202;

[0063] The atomizer 1203 faces the inside of the transverse ventilation shaft 13.

[0064] In this embodiment, the water pipe 1201 runs through the transverse ventilation shaft 13, and is used to transport water from the outside to the water tank 1202 of the transverse ventilation shaft 13 for water storage. It can be understood that if the transverse ventilation shaft 13 is below the ground level, the water pipe 1201 will run through the horizontal plane where the transverse ventilation shaft 13 is located to replenish water. The water pipe 1201 can be adjusted according to the adaptability of the environment to ensure that water can be taken; and the outlet of the atomizer 1203 faces the inside of the transverse ventilation shaft 13, and the water transported from the water tank 1202 is atomized and sprayed out by the atomizer 1203, with a wide coverage area and high water utilization rate.

[0065] In a specific implementation of this embodiment, the volume ratio of the transverse ventilation shaft 13 to the inner cavity is 8:225.

[0066] In this embodiment, in one implementation, the internal volume of the transverse ventilation shaft 13 is smaller than the volume of the inner cavity of the prefabricated cabin foundation 20. Thus, when the wind is about to enter the fine filtration area from the coarse-efficiency filtration area through the medium-efficiency filtration area, the wind speed can be effectively reduced in the larger space of the inner cavity of the prefabricated cabin foundation 20, and the effect of gravity becomes more significant, which is conducive to the natural sedimentation of sand and dust. In a preferred embodiment of the present structure, the volume ratio of the transverse ventilation shaft 13 to the inner cavity is set to 8:225, and the sedimentation effect is relatively good.

[0067] In a specific implementation of this embodiment, refer to Figure 1 The air outlet component includes an air outlet filter 15 and a fan air valve component 16; the fan air valve component 16 is arranged on the outside of the air outlet filter 15, and a dust cover is arranged outside the fan air valve component 16; the fan air valve component 16 includes a fan and an air outlet valve, the fan is used to guide the air inside the prefabricated cabin 14 to the outside, and the air outlet valve is used to adjust the air outlet volume in the prefabricated cabin 14.

[0068] An air inlet valve 19 is provided between the precision filter element 18 and the prefabricated cabin foundation 20 .

[0069] In this embodiment, the fan air valve component 16 includes a fan and an air outlet air valve, and an air inlet air valve 19 is arranged between the precision filter component 18 and the prefabricated cabin foundation 20. In one implementation method, when there is a ventilation demand, the fan and the air outlet air valve are started, and the air inlet air valve 19 is opened in conjunction. When there is no ventilation demand, the fan and the air outlet air valve are turned off, and the air inlet air valve 19 is closed at the same time. During this process, the air inlet air valve 19 and the air outlet air valve can both adjust the air flow accordingly; the precision filter component 18 is closer to the prefabricated cabin 14 than the air inlet air valve 19, and the air outlet filter component 15 is located on the inner side of the fan air valve component 16, which is convenient for quick disassembly and maintenance in the prefabricated cabin 14.

[0070] In some embodiments, filter elements such as coarse-effect filter element 3, medium-effect filter element 11, precision filter element 18 and air outlet filter element 15 can be in the form of filter nets, which can be suitable for various filtering needs through simple structural design with different mesh sizes, and are easy to install and replace. For some reusable filter nets, their filtering performance can be restored by simple cleaning.

[0071] In a specific implementation of this embodiment, refer to Figure 1 and Figure 4 , further comprising a mobile maintenance ladder 9; the mobile maintenance ladder 9 comprises a platform 902 and a ladder frame 904;

[0072] A platform guardrail 901 is provided at a first end of the platform 902, and a second end of the platform 902 is connected to a first end of a ladder frame 904;

[0073] A ladder guardrail 903 is disposed at the second end of the ladder frame 904 , and a universal shaft wheel 905 is disposed at the third end of the ladder frame 904 .

[0074] In this embodiment, the prefabricated cabin ventilation system is also equipped with a mobile maintenance ladder 9. During specific implementation, it can be set next to the centralized ventilation room 4 to facilitate the removal of the coarse filter 3 in the centralized ventilation room 4 for cleaning. Of course, it can also be used to clean the air outlet filter 15. In one implementation, the mobile maintenance ladder 9 includes a platform 902 and a ladder frame 904. The platform 902 is provided with a platform guardrail 901 and the ladder frame 904 is provided with a ladder guardrail 903, which is beneficial to ensuring the work safety of the staff. By arranging a universal shaft wheel 905 at the bottom of the ladder frame 904, it is easy to move.

[0075] In a specific implementation of this embodiment, refer to Figure 1 , Figure 5 and Figure 6 , further comprising a high-pressure air gun box 10; the high-pressure air gun box 10 comprises a high-pressure air gun 1001 and a box body 1002;

[0076] The box 1002 is used to install the filter element to be cleaned;

[0077] The high pressure air gun 1001 is used to clean the filter element.

[0078] In this embodiment, the coarse filter element 3 , the medium filter element 11 , the precision filter element 18 or the air outlet filter element 15 waiting to be cleaned are placed in the box 1002 to facilitate cleaning by a high-pressure air gun 1001 .

[0079] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated cabin ventilation system, characterized in that: include: Centralized ventilation rooms and prefabricated cabins; The centralized ventilation room is provided with ventilation louvers, and the ventilation louvers are provided with coarse-effect filters; The centralized ventilation room is connected to the foundation through a ventilation room foundation, a ventilation shaft is arranged in the ventilation room foundation, and the ventilation shaft is connected to the centralized ventilation room; The prefabricated cabin is connected to the foundation through a prefabricated cabin foundation, a precision filter is provided between the prefabricated cabin and the prefabricated cabin foundation, and the prefabricated cabin is provided with an air outlet assembly; The inner cavity of the prefabricated cabin foundation is connected to the ventilation shaft through a transverse ventilation shaft, and a medium-efficiency filter is arranged between the transverse ventilation shaft and the ventilation shaft; The transverse ventilation shaft is provided with a water spray dust suppression mechanism and a dust particle detector. The dust particle detector is used to detect the amount of sand and dust inside the transverse ventilation shaft, and the water spray dust suppression mechanism is used to suppress sand and dust inside the transverse ventilation shaft.

2. The prefabricated cabin ventilation system according to claim 1, characterized in that: The water spray dust suppression mechanism includes a water delivery pipe, a water tank and an atomizer; The water delivery pipe is connected to the atomizer through the water tank; The atomizer faces the interior of the transverse ventilation shaft.

3. The prefabricated cabin ventilation system according to claim 1, characterized in that: The volume ratio of the transverse ventilation shaft to the inner cavity is 8:

225.

4. The prefabricated cabin ventilation system according to claim 1, characterized in that: The medium-efficiency filter element is provided with a vibrator.

5. The prefabricated cabin ventilation system according to claim 1, characterized in that: The bottom of the transverse ventilation shaft is higher than the bottom of the vertical ventilation shaft.

6. The prefabricated cabin ventilation system according to claim 1, characterized in that: The ventilation room foundation is provided with an inspection door; A ventilation inspection ladder is provided below the inspection door; A sand receiving pool is arranged at the bottom of the ventilation shaft.

7. The prefabricated cabin ventilation system according to claim 1, characterized in that: An air inlet valve is arranged between the precision filter element and the prefabricated cabin foundation.

8. The prefabricated cabin ventilation system according to claim 1, characterized in that: The air outlet assembly includes an air outlet filter and a fan air valve component; The fan air valve component is arranged outside the air outlet filter component, and a dust cover is arranged outside the fan air valve component; The fan air valve component includes a fan and an air outlet air valve. The fan is used to discharge the air inside the prefabricated cabin to the outside, and the air outlet air valve is used to adjust the air outlet volume in the prefabricated cabin.

9. The prefabricated cabin ventilation system according to claim 1, characterized in that: Also included is a mobile maintenance ladder; the mobile maintenance ladder includes a platform and a ladder frame; A platform guardrail is disposed at a first end of the platform, and a second end of the platform is connected to a first end of the ladder frame; A ladder guardrail is arranged at the second end of the ladder frame, and a universal rotating shaft wheel is arranged at the third end of the ladder frame.

10. The prefabricated cabin ventilation system according to claim 1, characterized in that: It also includes a high-pressure air gun box; the high-pressure air gun box includes a high-pressure air gun and a box body; The box is used to house the filter element to be cleaned; The high-pressure air gun is used for cleaning the filter element.

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