Factory building air inlet filtering system and factory building with factory building air inlet filtering system

Abstract

The invention relates to the technical field of aero-engines, and discloses a factory building air inlet filtering system and a factory building with the factory building, the factory building air inlet filtering system is suitable for the factory building for engine complete machine test, the factory building air inlet filtering system comprises a maintenance platform arranged in an air inlet channel of the factory building, and the table top of the maintenance platform is parallel to the cross section of the air inlet channel; the overhauling opening is formed in the air inlet channel and located above the overhauling platform; the filtering device is arranged above the maintenance platform, the filtering device comprises a filtering part, and the filtering part is provided with a plurality of working stations; and the filtering part is suitable for moving along a first plane, and the first plane is parallel to the cross section of the air inlet channel, so that the different working positions are aligned with the air outlet of the air inlet channel. The maintenance platform, the air inlet and the filtering device are arranged in the air inlet channel of the plant, and the filtering device can be conveniently and safely maintained on the basis of effectively filtering inlet air.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation engines, and in particular to a plant air intake filtration system and a plant having the same. Background Art

[0002] During ground tests of aircraft turboshaft engines, intake air quality significantly impacts performance. Prolonged exposure to polluted air during full-machine testing can exacerbate the accumulation of oil and dust on the flow path surfaces. This accumulation leads to further contamination during extended testing, exacerbating engine performance degradation and even causing dangerous conditions such as engine surge.

[0003] At present, test plants generally simply install a metal mesh with a certain mesh size at the inlet of the vertical air intake tower. The filtering effect of the metal mesh is difficult to meet the engine test requirements. In addition, since the vertical air intake tower is located high up in the plant, the frequent maintenance of the metal mesh poses operational difficulties and safety hazards, affecting the test progress of the entire engine. Summary of the Invention

[0004] In view of this, the present invention provides a plant air intake filtration system and a plant having the same, so as to solve the problem that the existing metal mesh maintenance operation is difficult and has safety hazards, which affects the engine whole machine test process.

[0005] In a first aspect, an embodiment of the present invention provides a plant air intake filtration system suitable for a plant for engine whole machine testing, comprising:

[0006] An inspection platform is provided in the air inlet passage of the plant building, and a table top of the inspection platform is parallel to a cross section of the air inlet passage;

[0007] An inspection port is provided on the air inlet passage and is located above the inspection platform;

[0008] A filtering device is provided above the maintenance platform, wherein the filtering device comprises a filtering portion, and the filtering portion is provided with a plurality of working positions;

[0009] The filter portion is adapted to move along a first plane, and the first plane is parallel to a cross section of the air inlet passage, so that different working positions are aligned with the exhaust port of the air inlet passage.

[0010] Beneficial effects: An inspection platform is set up in the air intake channel of the factory building, and an inspection port is set up on the air intake channel. When inspecting the filter device in the air intake channel, the maintenance personnel can enter the air intake channel through the inspection port and be supported by the inspection platform to perform maintenance operations, which makes the maintenance process of the filter device simple and reduces safety hazards.

[0011] A filtering device is provided in the air intake passage, and a plurality of working positions on the filtering part of the filtering device can be controllably aligned with the exhaust port of the air intake passage. When the filtering effect of one of the working positions of the filtering part is reduced, the frequency of inspection and maintenance of the filtering device is reduced by replacing another working position and aligning it with the exhaust port of the air intake passage, thereby ensuring normal testing of the entire engine.

[0012] Optionally, a plurality of air passages are provided on the maintenance platform.

[0013] Beneficial effect: An air passage is provided on the maintenance platform, which enables the air discharged from the exhaust end of the filter device to pass through the maintenance platform, thereby effectively realizing air supply in the factory building.

[0014] Optionally, it further includes a control mechanism, which is at least partially disposed in the air inlet passage and is in communication with the filtering device;

[0015] The control mechanism is adapted to obtain pressure information on both sides of the filter device, and drive the filter portion to move relative to the air inlet passage according to the obtained pressure information.

[0016] Beneficial effects: The control mechanism can determine whether the filter part of the filter device needs to change its working position and align with the exhaust port of the air intake channel based on the pressure information on both sides of the filter device, and can drive the filter part to move so that another working position is aligned with the exhaust port of the air intake channel, thereby realizing monitoring to switch the working position of the filter part and reducing labor costs.

[0017] Optionally, the filtering device further comprises:

[0018] a first winding member, disposed close to a first side wall of the air inlet passage, wherein one end of the filter portion is wound around the first winding member;

[0019] a second winding member disposed near a second side wall of the air inlet passage, the first side wall and the second side wall being disposed opposite to each other, and the other end of the filter portion being wound around the second winding member;

[0020] The driving mechanism is in driving connection with the second winding member to drive the filter portion to move along the first plane.

[0021] Beneficial Effects: The first and second winding members, in conjunction with the drive mechanism, allow the filter unit to be wound around the first and second winding members, ensuring that the filter unit can move relative to the air inlet passage along the first plane, facilitating replacement of the entire filter unit. This also reduces the footprint of the filter device and lowers operating costs.

[0022] Optionally, the filtering device further comprises:

[0023] a first receiving box, in which the first winding member is disposed and rotatably engaged with the first winding member;

[0024] The second storage box is provided with the second winding member inside and is rotationally matched with the second winding member.

[0025] Beneficial effect: The first accommodating box and the second accommodating box are provided to protect the first winding member and the second winding member respectively, so that the filter parts located in the first accommodating box and the second accommodating box can reduce external air pollution.

[0026] Optionally, the control mechanism includes:

[0027] A first pressure sensor and a second pressure sensor are respectively arranged on both sides of the filter portion;

[0028] A controller is communicatively connected with the first pressure sensor, the second pressure sensor and the driving mechanism.

[0029] Beneficial effect: The first pressure sensor and the second pressure sensor are used to monitor the pressure on both sides of the filter device, and the monitoring results are fed back to the controller. The controller determines whether to start the driving mechanism based on the monitoring results to facilitate the replacement of the working position on the filter part.

[0030] Optionally, a sound-absorbing inspection door is provided in the inspection port.

[0031] Beneficial effect: The sound-absorbing inspection door can cover the inspection port, and the sound-absorbing inspection door ensures the air intake sound-absorbing effect of the factory building.

[0032] Optionally, the inspection port is provided on a side wall of the air inlet passage;

[0033] And / or, the inspection port is arranged at the top end of the air intake passage.

[0034] Beneficial effect: The inspection port is arranged on the side wall and / or the top of the air inlet passage to facilitate the staff to enter and exit the air inlet passage.

[0035] Optionally, a protective net is provided in the air intake passage, and the protective net is provided below the maintenance platform and extends along the cross-sectional direction of the air intake passage.

[0036] Beneficial effect: A protective net is set under the maintenance platform to improve the safety of the maintenance process. The protective net can block tools that fall from the air passage of the maintenance platform, further improving the operational safety of the maintenance process.

[0037] In a second aspect, an embodiment of the present invention provides a factory building, comprising any of the factory building air intake filtration systems described above.

[0038] Beneficial effects: The factory building is equipped with the above-mentioned factory building air intake filtration system, which uses the factory building air intake filtration system to filter the air entering the factory building, effectively preventing the aviation turboshaft engine from being exposed to the polluted air environment for a long time during the whole machine test, and ensuring the normal progress of the whole machine test of the engine.

[0039] In addition, an inspection platform and an inspection port are set in the air intake channel, and the filter device is set to multiple working positions, and the multiple working positions can be switched controllably to be aligned with the exhaust port of the air intake channel, thereby improving the operational safety of the filter device maintenance process and reducing the maintenance frequency of the filter device, thereby reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 Schematic diagram of the positional relationship between the filter device and the air intake channel according to an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the positional relationship between the factory building and the air inlet according to an embodiment of the present invention;

[0043] Figure 3 Schematic diagram of the structure of the filtering device according to an embodiment of the present invention;

[0044] Figure 4 A control logic diagram of a control mechanism according to an embodiment of the present invention;

[0045] Description of reference numerals:

[0046] 1. Factory building; 2. Air inlet duct; 201. Exhaust port; 202. Air inlet; 3. Maintenance platform; 4. Maintenance port; 5. Filter unit; 6. Air passage; 7. First winding member; 8. Second winding member; 9. Drive mechanism; 10. First holding box; 11. Second holding box; 12. First pressure sensor; 13. Second pressure sensor; 14. Controller; 15. Silencer maintenance door; 16. Protective net; 17. Rain cover. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0048] During ground tests of aircraft turboshaft engines, intake air quality significantly impacts performance. Prolonged exposure to polluted air during full-machine testing can exacerbate the accumulation of oil and dust on the flow path surfaces. This accumulation leads to further contamination during extended testing, exacerbating engine performance degradation and even causing dangerous conditions such as engine surge.

[0049] Currently, due to the high height of the vertical air intake tower in Building 1, to reduce unnecessary maintenance, test plants typically do not install air intake filtration devices. Instead, they simply install a metal mesh with a certain mesh size at the inlet of the vertical air intake tower. This only prevents large foreign objects from entering the plant, but is ineffective in filtering dust and other debris. Furthermore, the metal mesh requires frequent maintenance, which is difficult to operate and poses safety risks, hindering the progress of engine testing.

[0050] To solve the above problems, please refer to Figures 1-4 In the first aspect, an embodiment of the present invention provides a factory air intake filtration system, which is suitable for a factory 1 for engine whole machine testing, and includes an inspection platform 3 and an inspection port 4, wherein the inspection platform 3 is arranged in the air intake channel 2 of the factory 1, and the table top of the inspection platform 3 is parallel to the cross-section of the air intake channel 2; the inspection port 4 is arranged on the air intake channel 2 and is located above the inspection platform 3.

[0051] In this embodiment, air intake duct 2 is disposed within a vertical air intake tower. Outside air enters air intake duct 2 through air intake port 202 of the vertical air intake tower and is then delivered into factory building 1 through exhaust port 201 of air intake duct 2. A maintenance platform 3 is provided within air intake duct 2 of factory building 1, and an access port 4 is provided on air intake duct 2. When inspecting the filter device within air intake duct 2, maintenance personnel can enter air intake duct 2 through access port 4 and be supported by maintenance platform 3 to perform maintenance operations. This simplifies maintenance of the filter device and reduces safety risks.

[0052] Among them, the factory air intake filtration system also includes a filtering device, which is arranged above the maintenance platform 3, and the filtering device includes a filtering part 5, and the filtering part 5 is provided with multiple working positions; wherein, the filtering part 5 is suitable for moving along a first plane, and the first plane is parallel to the cross-section of the air intake channel 2, so that different working positions and the exhaust port 201 of the air intake channel 2 are aligned.

[0053] In this embodiment, the filter unit 5 is movably disposed within the air intake passage 2, and the sidewalls of the filter unit 5 are in close contact with the inner wall of the air intake passage 2, ensuring that outside air is filtered by the filter unit 5 before entering the factory building 1. Multiple working positions on the filter unit 5 are controllably aligned with the exhaust port 201 of the air intake passage 2. If the filtering effect of one working position of the filter unit 5 decreases, another working position can be replaced to align with the exhaust port 201 of the air intake passage 2, thereby reducing the frequency of filter device inspection and maintenance and ensuring normal engine testing.

[0054] Specifically, the filter unit 5 is configured as a flexible filter material layer that can filter the air. The filter unit 5 can be configured as a single piece of flexible filter material layer. When the filter unit 5 changes its working position and aligns with the exhaust port 201, it is only necessary to move the filter unit 5 so that the contaminated working position and the exhaust port 201 are offset, thereby completing the working position change operation. Alternatively, the filter unit 5 can be configured as a continuous flexible filter material layer with connecting strips provided between adjacent working positions. The connecting strips do not have a filtering function. When the filter unit 5 changes its working position and aligns with the exhaust port 201, the filter unit 5 can be moved to align the next working position with the exhaust port 201, thereby completing the working position change operation.

[0055] Preferably, refer to Figure 1 The bottom surface of the filter unit 5 is aligned with the top surface of the maintenance platform 3, or a small gap is provided between the bottom surface of the filter unit 5 and the top surface of the maintenance platform 3. This allows the maintenance platform 3 to support the filter unit 5, increasing its strength and preventing damage to the filter unit 5 when filtering high-velocity air. Furthermore, during maintenance, maintenance personnel, supported by the maintenance platform 3, can avoid damage to the filter unit 5 when stepping on it, thereby extending its service life.

[0056] Preferably, refer to Figure 2 The air intake channel 2 adopts side air intake, and a plurality of air inlets 202 are provided, which are arranged at intervals along the circumferential direction of the side wall of the vertical air intake tower. An air intake silencer structure is provided in the air inlet 202 to achieve an air intake silencer effect.

[0057] Preferably, the filter material of the filter part 5 is a filter element of G4 specification, which can effectively filter the dust in the air without generating excessive air resistance, thus meeting the air intake requirements of the factory.

[0058] Preferably, a rain cover 17 is installed at the top of the vertical air intake tower to prevent rainwater from entering the air intake channel 2 and damaging the silencer and filter device of the air intake 202.

[0059] Optionally, refer to Figure 1 , a plurality of air passages 6 are provided on the maintenance platform 3 .

[0060] In this embodiment, an air passage 6 is provided on the maintenance platform 3 , which enables the air exhausted from the exhaust end of the filter device to pass through the maintenance platform 3 , thereby effectively achieving air supply to the factory building 1 .

[0061] Preferably, the maintenance platform 3 adopts a mesh plate, a steel frame or a toothed grille tread, which can achieve an anti-slip effect and has mesh holes to form an air passage 6, thereby facilitating air circulation.

[0062] Preferably, the distance between the top surface of the maintenance platform 3 and the inner wall of the top surface of the vertical air intake tower is set to 1500-1800 mm to provide maintenance space for maintenance personnel to facilitate maintenance and repair.

[0063] Preferably, a platform ladder is provided on the top surface of the maintenance platform 3 near the maintenance opening 4 , so that maintenance personnel can enter the maintenance platform 3 through the maintenance opening 4 .

[0064] Optionally, refer to Figure 4 , and also includes a control mechanism, which is at least partially arranged in the air intake channel 2 and is communicated with the filtering device; wherein the control mechanism is suitable for obtaining pressure information on both sides of the filtering device and driving the filtering part 5 to move relative to the air intake channel 2 according to the obtained pressure information.

[0065] In this embodiment, the control mechanism can determine whether the filter part 5 of the filter device needs to change its working position and align with the exhaust port of the air intake channel 2 based on the pressure information on both sides of the filter device, and can drive the filter part 5 to move so that another working position is aligned with the exhaust port of the air intake channel 2, thereby realizing automatic monitoring and switching of the working position of the filter part 5 and reducing labor costs.

[0066] Optionally, refer to Figure 3 The filtering device also includes a first winding member 7, a second winding member 8 and a driving mechanism 9, wherein the first winding member 7 is arranged close to the first side wall of the air inlet channel 2, and one end of the filter part 5 is wound around the first winding member 7; the second winding member 8 is arranged close to the second side wall of the air inlet channel 2, the first side wall and the second side wall are arranged opposite to each other, and the other end of the filter part 5 is wound around the second winding member 8; the driving mechanism 9 is transmission-connected to the second winding member 8 to drive the filter part 5 to move along the first plane.

[0067] In this embodiment, the filter part 5 adopts a flexible filter layer, which can be wound on the first winding member 7 and the second winding member 8. The driving mechanism 9 is used to drive the second winding member 8 to rotate, so that the filter part 5 moves in the direction of being wound on the second winding member 8, ensuring that the filter part 5 can move along the first plane relative to the air inlet channel 2, so that the filter part 5 wound on the second winding member 8 increases, and the filter part 5 wound on the first winding member 7 decreases, thereby realizing the alignment of different working positions of the filter part 5 and the air inlet 202.

[0068] After all the working positions of the filter unit 5 have been used, the filter unit 5 is concentrated on the second winding member 8, making it easier for maintenance personnel to replace the entire filter unit 5. Furthermore, both the first winding member 7 and the second winding member 8 are disposed within the air inlet passage 2, reducing the footprint of the filter device, effectively filtering the air while reducing operating costs.

[0069] Preferably, the first winding member 7 and the second winding member 8 are one of a rotating roller, a rotating rod or a winding roller. The driving mechanism 9 is configured as a rotary motor.

[0070] Optionally, refer to Figure 3 The filtering device also includes a first accommodating box 10 and a second accommodating box 11, wherein a first winding member 7 is provided inside the first accommodating box 10 and rotates with the first winding member 7; a second winding member 8 is provided inside the second accommodating box 11 and rotates with the second winding member 8.

[0071] In this embodiment, a first storage box 10 and a second storage box 11 are provided to protect the first and second winding members 7, 8, respectively, allowing the filter unit 5 located within the first and second storage boxes 10, 11 to reduce external air pollution. Furthermore, the first and second storage boxes 10, 11 provide support for the first and second winding members 7, 8, respectively, allowing them to rotate and drive the filter unit 5.

[0072] Furthermore, another drive mechanism 9 is provided on the first winding member 7. The sidewall of the second storage box 11 is provided with an opening. The filter unit 5 enters the second storage box 11 through the opening and is wound around the second winding member 8. The top surface of the filter unit 5 contacts the wall surface of the opening of the second storage box 11. In this way, as the second winding member 8 drives the filter unit 5, it scrapes against the wall surface of the second storage box 11, removing some of the filtered material from the used working position of the filter unit 5. When the filter unit 5 is about to be used, the drive mechanism 9 on the first winding member 7 is activated, causing the filter unit 5 to move in the opposite direction, allowing it to be used again and extending the service life of the filter unit 5.

[0073] Among them, when two driving mechanisms 9 are provided and are respectively connected to the first winding member 7 and the second winding member 8, when the filter part 5 moves in one direction driven by one of the driving mechanisms 9, the setting of the other driving mechanism 9 does not hinder the normal movement of the filter part 5.

[0074] Furthermore, based on the above embodiment, a detachable scraper is provided on the opening of the second holding box 11, and the scraper contacts the top surface of the filter unit 5. The scraper is detachable from the second holding box 11, which facilitates separation of the filtered material from the second holding box 11 and improves maintenance efficiency.

[0075] In a specific embodiment, the controller 14 is mounted on the ground and is equipped with an alarm device, such as an audible alarm and / or a visual alarm, and the drive mechanism 9 is manually activated. When the controller 14 detects that the data acquired by the first pressure sensor 12 and the second pressure sensor 13 do not match the preset data, indicating that the pressure on both sides of the filter unit 5 is abnormal and that the working position needs to be changed and aligned with the air inlet 202, the audible alarm and / or the visual alarm will alert the maintenance personnel, who will then manually operate the filter unit 5 to move. In this way, the maintenance personnel can selectively set the travel length of the filter unit 5 according to actual needs to ensure the filtering effect of the filter unit 5.

[0076] Preferably, refer to Figure 1 The control mechanism includes a first pressure sensor 12 and a second pressure sensor 13, which are respectively arranged on both sides of the filter part 5; the controller 14 is communicatively connected with the first pressure sensor 12, the second pressure sensor 13 and the driving mechanism 9.

[0077] In this embodiment, controller 14 is mounted on the ground and is equipped with an alarm device, such as an audible and / or visual alarm. Drive mechanism 9 is automatically activated by controller 14. When controller 14 detects that the data acquired by first pressure sensor 12 and second pressure sensor 13 do not match preset data, indicating that the pressures on both sides of filter unit 5 are abnormal and that a change in working position and alignment with air inlet 202 is necessary, an audible and / or visual alarm alerts maintenance personnel, and controller 14 activates drive mechanism 9, causing it to operate and move filter unit 5 a preset distance. This enables automatic replacement of working positions on filter unit 5, reducing labor costs.

[0078] Specifically, a signal sending device (not shown in the figure) is provided inside or outside the vertical air intake tower, and a signal receiving device is provided on the controller 14. The real-time pressure information obtained by the first pressure sensor 12 and the second pressure sensor 13 is sent to the signal sending device, and the signal sending device sends it to the signal receiving device provided on the controller 14 via wired or wireless means, thereby realizing remote control.

[0079] Likewise, the driving mechanism 9 is provided with a remote control related structure so that maintenance personnel or the controller 14 can control the start and stop of the driving mechanism 9 on the ground.

[0080] In a specific embodiment, the pressure difference setting value of the first pressure sensor 12 and the second pressure sensor 13 is 100-130Pa, and the pressure difference setting value is preferably set to 120Pa. When the pressure difference increases to 120Pa, the sound alarm and / or light alarm is activated, and the driving mechanism 9 is started to remove the new working position from the first winding member 7 to realize the automatic replacement of the filter structure operation.

[0081] Optionally, refer to Figure 1 A silencer inspection door 15 is provided in the inspection port 4.

[0082] In this embodiment, when the air inlet duct 2 is in operation or when maintenance of the air inlet duct 2 is not required, the inspection port 4 is closed by the muffler inspection door 15. In this way, the muffler inspection door 15 cooperates with the air inlet muffler structure in the air inlet 202 to ensure the air inlet muffler effect of the factory building 1.

[0083] Preferably, the noise reduction effect of the silencer inspection door 15 and the air intake silencer structure is greater than 60db.

[0084] Optionally, refer to Figure 1 , the inspection port 4 is arranged on the side wall of the air intake passage 2; and / or, the inspection port 4 is arranged on the top of the air intake passage 2.

[0085] In this embodiment, the inspection port 4 can be provided on the side wall and / or top surface of the air intake passage 2. The specific location of the inspection port 4 can be adjusted according to actual needs. For example, if the inspection port 4 is provided on the side wall of the air intake passage 2, the inspection port 4 is provided below the air intake 202 to prevent the inspection port 4 from disrupting the layout of the air intake 202. This ensures normal air intake in the air intake passage 2 while facilitating access for maintenance personnel.

[0086] Optionally, refer to Figure 1 A protective net 16 is provided in the air intake passage 2 . The protective net 16 is provided below the maintenance platform 3 and extends along the cross-sectional direction of the air intake passage 2 .

[0087] In this embodiment, a protective net 16 is provided below the maintenance platform 3 to improve the safety of the maintenance process. The protective net 16 can block tools that fall from the air passage 6 of the maintenance platform 3, further improving the operational safety of the maintenance process.

[0088] Preferably, the above-mentioned filtering device, maintenance platform and protective net are all made of stainless steel and coated with an anti-rust coating on their surface to prevent the device from rusting and producing iron filings that are sucked into the aviation turboshaft engine and affect the safety of the test.

[0089] Secondly, refer to Figure 2 , an embodiment of the present invention provides a factory building 1, comprising any one of the above-mentioned factory building air intake filtration systems.

[0090] In this embodiment, a vertical air intake tower is provided at the top of the factory building 1, an air intake channel 2 is provided inside the vertical air intake tower, and the air intake channel 2 is provided with the above-mentioned factory building air intake filtration system. The factory building air intake filtration system is used to filter the air entering the factory building 1, effectively avoiding the engine from being exposed to a polluted air environment for a long time during the whole machine test, thereby ensuring that the whole machine test of the engine is carried out normally.

[0091] An inspection platform 3 and an inspection port 4 are provided in the air intake channel 2, and the filter device is provided with multiple working positions, and the multiple working positions can be switched controllably to align with the exhaust port of the air intake channel 2, thereby improving the operational safety of the filter device maintenance process and reducing the maintenance frequency of the filter device, thereby reducing labor costs.

[0092] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A factory air intake filtration system, characterized in that: A workshop suitable for engine complete machine testing (1), including: An inspection platform (3) is arranged in the air inlet passage (2) of the factory building (1), and a tabletop of the inspection platform (3) is parallel to a cross section of the air inlet passage (2); An inspection port (4) is provided on the air inlet passage (2) and is located above the inspection platform (3); A filtering device is arranged above the maintenance platform (3), the filtering device comprising a filtering portion (5), and the filtering portion (5) is provided with a plurality of working positions; The filter portion (5) is adapted to move along a first plane, the first plane being parallel to a cross section of the air inlet channel (2), so that different working positions are aligned with the exhaust port (201) of the air inlet channel (2).

2. The plant air intake filtration system according to claim 1, characterized in that: The maintenance platform (3) is provided with a plurality of air passages (6).

3. The factory air intake filtration system according to claim 1, characterized in that: It also includes a control mechanism, which is at least partially disposed in the air inlet passage (2) and is in communication with the filter device; The control mechanism is suitable for obtaining pressure information on both sides of the filter device, and driving the filter portion (5) to move relative to the air inlet passage (2) based on the obtained pressure information.

4. The factory air intake filtration system according to claim 3, characterized in that: The filtering device further comprises: A first winding member (7) is arranged close to a first side wall of the air inlet passage (2), and one end of the filter portion (5) is wound around the first winding member (7); A second winding member (8) is arranged close to a second side wall of the air inlet channel (2), the first side wall and the second side wall are arranged opposite to each other, and the other end of the filter portion (5) is wound around the second winding member (8); A driving mechanism (9) is in driving connection with the second winding member (8) to drive the filter portion (5) to move along the first plane.

5. The factory air intake filtration system according to claim 4, characterized in that: The filtering device further comprises: a first receiving box (10), in which the first winding member (7) is disposed and rotatably cooperates with the first winding member (7); The second receiving box (11) is provided with the second winding member (8) inside and is rotatably matched with the second winding member (8).

6. The factory air intake filtration system according to claim 4, characterized in that: The control mechanism includes: A first pressure sensor (12) and a second pressure sensor (13) are respectively arranged on both sides of the filter portion (5); A controller (14) is communicatively connected with the first pressure sensor (12), the second pressure sensor (13) and the driving mechanism (9).

7. The plant air intake filtration system according to any one of claims 1 to 6, characterized in that: A sound-absorbing inspection door (15) is provided in the inspection opening (4).

8. The plant air intake filtration system according to any one of claims 1 to 6, characterized in that: The inspection port (4) is provided on a side wall of the air inlet passage (2); And / or, the inspection port (4) is arranged at the top end of the air intake passage (2).

9. The plant air intake filtration system according to any one of claims 1 to 6, characterized in that: A protective net (16) is provided in the air intake passage (2); the protective net (16) is provided below the maintenance platform (3) and extends along the cross-sectional direction of the air intake passage (2).

10. A factory building, characterized in that: A plant air intake filtration system comprising the plant air intake filtration system according to any one of claims 1 to 9.

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