An assembled filter device

Abstract

The application discloses a kind of assembled filter device, it includes the first shell and second shell of one end opening, the opening of first shell and second shell is sealed butt joint by connecting mechanism, the other end of first shell and second shell is provided with air inlet and air outlet respectively, sample release device, sterilization module, precision filtration module are sequentially arranged in first shell from air inlet to opening, precision filtration module is arranged on replacement mechanism, leak detection scanning mechanism is further arranged on the replacement mechanism at the rear end of precision filtration module, air extractor or several filter plates are selectively arranged in second shell;The scheme adopts the structure design of assembled type, can realize the convenient replacement of filter device and air extractor, when connecting air extractor, it can be used as the clean ventilation equipment of epidemic prevention in sickroom, and when connecting filter plate, it can be used as air defense equipment, so that the scheme realizes the flexible change of wartime air defense, epidemic prevention and war conversion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a spliced filter device. BACKGROUND

[0002] The filter refers to the device for filtering, which is generally used for filtering liquid or gas, and the filter for filtering air generally achieves the functions of clean workshop, plant, creating dust-free environment, ventilation and epidemic prevention in sick area by removing dust, purifying harmful substances and sterilizing.

[0003] The existing filter has a precision filtering unit, a sterilization unit and a filter poison unit installed in the same shell, and the shell straight section and the two circular end covers are connected in one body by spinning, which has the functions of precision filtering, biological sterilization and filter poison, but the whole filter device is simple and fixed in structure, cannot detect whether the filtering part is invalid in real time, and is a sealed structure except the inlet and outlet, so the internal filtering part cannot be conveniently replaced, and when the filtering part is invalid, the whole filter device needs to be replaced; at the same time, the air passing through this kind of filter needs to go through three steps of precision filtering, biological sterilization and filter poison, which is generally only used in civil air defense engineering and is suitable for ventilation in wartime civil air defense engineering, and if used for ventilation in normal times, its role is easily redundant, resulting in high use cost; therefore, the existing filter cannot be flexibly changed and adapted according to the actual filtering demand of air. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides a spliced filter device, which solves the problems of fixed structure, single function and difficulty in detecting and replacing the filtering part of the existing filter.

[0005] To achieve the above-mentioned purposes, the technical scheme adopted by the present application is as follows:

[0006] The present application provides a spliced filter device, which comprises a first shell and a second shell with one end open, the openings of the first shell and the second shell are sealed and connected by a connecting mechanism, the other ends of the first shell and the second shell are respectively provided with an air inlet and an air outlet, a sample release device, a sterilization module and a precision filtering module are sequentially arranged in the first shell from the air inlet to the opening, the precision filtering module is arranged on a replacement mechanism, and a leak detection scanning mechanism is further arranged on the replacement mechanism at the rear end of the precision filtering module, and a suction fan or a plurality of filter poison plates are selectively arranged in the second shell.

[0007] The beneficial effects of the above technical scheme are as follows: the present application adopts a spliced structure design, which can realize the convenient replacement of the filter poison device and the suction fan, when the suction fan is connected, it can be used as a clean ventilation equipment for epidemic prevention in sick area, and when the filter poison plate is connected, it can be used as a civil air defense equipment for air defense, so that the present application can realize the flexible change of wartime air defense, epidemic prevention in epidemic period and conversion in peacetime.

[0008] Further, the square flanges of the first and second housings are outwardly protruding, the square flange of the first housing is provided with a plurality of notches, the square flange of the second housing is provided with a plurality of bent plates matched with the notches and achieving butt joint positioning, the connecting mechanism is a ring-shaped clamp fixed on the square flange, and a square gasket is arranged between the ring-shaped clamp and the square flange.

[0009] Further, the ring-shaped clamp is formed by butt joint of two clamps, the clamp comprises a first slot plate, second slot plates are hinged to both ends of the first slot plate, and an L-shaped top plate is arranged at the hinge position, the corner of the square flange is provided with a baffle abutting against the L-shaped top plate, a clamping block is arranged in each of the first slot plate and the second slot plate, a plurality of clamping grooves matched with the clamping blocks are arranged on the square flange, and the second slot plates at both ends of the two clamps are respectively butt jointed and clamped and fixed on the bent plates by bolts.

[0010] The beneficial effects of the above technical scheme are that the square gasket and the ring-shaped clamp are matched to achieve sealed butt joint of the first and second housings, the ring-shaped clamp structure is stable and convenient to disassemble and assemble, in the installation process, the clamping blocks on the first slot plate are clamped with the clamping grooves on the square flange, then the second slot plate is rotated and the clamping blocks on the second slot plate are clamped with the clamping grooves on the square flange, while the second slot plate is rotated, the L-shaped top plate abuts against and is pressed with the baffle, and as the rotation angle increases, the distance between the hinge point and the vertex of the baffle increases, so that the hinge point moves downward, i.e. the first slot plate moves downward, so that the first slot plate presses the square gasket, and the second slot plate is fastened by bolts and presses the square gasket, thereby achieving good sealing effect.

[0011] Further, the air inlet is provided with a bent plate, the bent plate comprises a plurality of blocking plates parallel to the air inlet and a plurality of side plates perpendicular to the blocking plates, the side plates are uniformly provided with a plurality of flow holes, the sample releasing device comprises a ring-shaped pipe, the ring-shaped pipe is located at the air inlet outside the bent plate, a plurality of air holes are uniformly distributed on the circumference of the ring-shaped pipe, the housing is provided with an injection interface and a sampling interface, the injection interface is communicated with the ring-shaped pipe, and the sampling interface is communicated with the inner cavity of the first housing inside the bent plate.

[0012] The beneficial effects of the above technical scheme are that the blocking plates can be used to block the explosion shock wave from the air inlet port, so as to avoid damage to the components inside the housing, and the flow holes on the side plates facilitate the entry of gas into the housing; the external sample generating device can inject sample gas through the injection interface, uniformly diffuse through the ring-shaped pipe, obtain sample gas through the sampling interface, and detect through the external detection instrument, so as to obtain the sample gas concentration in front of the fine filter module.

[0013] Further, a wind speed sensor is arranged at the air inlet outside the bending plate, a temperature and humidity sensor and a differential pressure sensor are arranged at the air inlet inside the bending plate, the first interface end of the differential pressure sensor is communicated with the inner cavity of the shell at the front end of the fine filter module, the first shell is provided with a first differential pressure interface communicated with the second interface end of the differential pressure sensor, the second shell close to the air outlet is provided with a second differential pressure interface communicated with the first differential pressure interface, the sterilization module comprises a plurality of sterilization devices capable of generating ozone, and the plurality of sterilization devices are arranged at the inner side of the plurality of blocking plates, and the plurality of sterilization devices are electrically connected with the sterilization controller.

[0014] The beneficial effects of the above technical scheme are: the wind speed and temperature and humidity of the air inlet can be monitored in real time, and the differential pressure between the air inlet and the air outlet can be monitored in real time through the differential pressure sensor. When the differential pressure reaches a certain value, it indicates that the fine filter module and / or the filter plate is blocked, so that timely replacement is performed to avoid the situation of low filtering efficiency and poor filtering effect caused by blockage; the sterilization controller can control the sterilization device to generate ozone to sterilize the gas passing through the flow hole.

[0015] Further, the fine filter module comprises an outer frame, a filter layer is arranged in the outer frame, the two ends of the filter layer are clamped flat by a mesh plate, the mesh plate and the filter layer are sealingly connected with the outer frame around, an annular knife edge is arranged in the first shell, an annular liquid tank is arranged at the front end of the outer frame, the annular liquid tank is filled with liquid tank glue, and the replacement mechanism drives the fine filter module to move forward and makes the annular liquid tank sealingly butt joint with the annular knife edge.

[0016] The beneficial effects of the above technical scheme are: the annular knife edge and the liquid tank glue in the annular liquid tank are sealingly bonded when the annular knife edge and the annular liquid tank are sealingly butt joint, and the sealing effect is good and not easy to fail; at this time, the fine filter module is installed in place, and the gas in the first shell can only pass through the filter layer, so as to filter the particles in the gas.

[0017] Further, the replacement mechanism comprises a frame body slidingly fitted with the inner wall of the first shell, the front end of the frame body is provided with a placing rack for placing the fine filter module, the rear end of the frame body is provided with a connecting rod pressing mechanism for fixing the fine filter module, the connecting rod pressing mechanism comprises a first rotating rod and a second rotating rod, the first rotating rod and the second rotating rod are both hinged on the two sides of the frame body, and a connecting rod is hinged between the first rotating rod and the second rotating rod, the hinged portions of the first rotating rod and the second rotating rod with the frame body are both provided with a pressing wheel, the edge outside the pressing wheel is provided with a limiting column, the first shell is provided with a limiting plate abutting against the limiting column, the two first rotating rods are connected through a handle, and the first rotating rod is detachably connected with the frame body through a positioning screw.

[0018] The beneficial effects of the above technical scheme are: the convenient disassembly and assembly of the precision filter module can be realized through the replacement mechanism. In specific implementation, the second shell is first disassembled, then the positioning screw is disassembled, the first rotating rod and the second rotating rod are synchronously rotated by the handle, the limiting column and the limiting plate are buckled, the rack is pulled out to the outside, the precision filter module on the rack is replaced, the rack is pushed into the first shell, the first rotating rod and the second rotating rod are synchronously rotated by the handle, the pressing wheel is rotated, the limiting column and the limiting plate are abutted, the rack is pressed to the front end, the precision filter module is moved forward, and the annular liquid tank is sealed and connected with the annular knife edge. At this time, the precision filter module is installed in place, and finally the first rotating rod is fixed on the rack by the positioning screw.

[0019] Further, the leak detection scanning mechanism includes a vertical screw rod arranged on the rack, a screw nut matched with the vertical screw rod, and a gas collection groove with an opening facing the precision filter module arranged on the screw nut. The gas collection groove is flat, and the horizontal length of the gas collection groove is matched with the horizontal length of the precision filter module. The two ends of the gas collection groove are slidably connected with the vertical rod, the bottom of the gas collection groove is arc-shaped with a concave middle part, and the center of the bottom of the gas collection groove is connected with the leak detection interface on the first shell through a hose.

[0020] The beneficial effects of the above technical scheme are: the test sample gas at different positions of the rear end of the precision filter module can be collected through the leak detection scanning mechanism, and the detection and analysis can be performed through the external detection instrument, so as to achieve the purpose of detecting the precision filtering effect of the precision filter module, and the failed precision filter module can be replaced in time.

[0021] Further, the end of the vertical screw rod is provided with a strip-shaped rotating block, a driving short shaft is embedded on the first shell, and a sink groove matched with the strip-shaped rotating block is arranged on the driving short shaft. The width of the sink groove is less than the length of the strip-shaped rotating block, and the width of the sink groove is greater than the width of the strip-shaped rotating block.

[0022] The beneficial effects of the above technical scheme are: when the precision filter module is installed in place, the vertical screw rod and the driving short shaft are rotationally connected through the cooperation of the strip-shaped rotating block and the sink groove, so that the operator can move the gas collection groove up and down by rotating the driving short shaft on the first shell. When the precision filter module is replaced, the strip-shaped rotating block can automatically slide out of the sink groove, so that the vertical screw rod and the driving short shaft are separated.

[0023] Further, a plurality of filter plates are arranged in the second shell in sequence, adjacent two filter plates are arranged in a V shape, one end of the adjacent two filter plates is connected in a sealed manner through a U-shaped groove, the filter plate is hollow, two parallel partition plates are arranged in the gap of the filter plate, a plurality of mesh holes are arranged on the plate surface and the partition plate of the filter plate, activated carbon particles are filled in the chamber between the plate surface and the partition plate of the filter plate, and an air cavity layer is formed between the two partition plates.

[0024] The beneficial effects of the above technical solutions are that the V-shaped arrangement of the plurality of filter plates is conducive to increasing the number of filter plates inside the shell, thereby increasing the area of the windward surface of the filter plates and improving the filtering efficiency; and the combination of carbon layer, cavity layer and carbon layer for the filter plates enables the gas passing through the filter plates to be balanced again in the cavity layer, thereby improving the filtering effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Figure 1 is a structural schematic diagram of the assembled filter device according to the present application.

[0026] Figure 2 Figure 2 is a structural schematic diagram of the first shell provided with an exhaust fan.

[0027] Figure 3 Figure 3 is a side sectional view of the first shell.

[0028] Figure 4 Figure 4 is a structural schematic diagram of the first shell and the second shell.

[0029] Figure 5 Figure 5 is an exploded view of the ring-shaped hoop.

[0030] Figure 6 Figure 6 is a sectional view of the ring-shaped hoop and the square flange.

[0031] Figure 7 Figure 7 is an end sectional view of the first shell.

[0032] Figure 8 Figure 8 is a structural schematic diagram of the fine filter module.

[0033] Figure 9 Figure 9 is a structural schematic diagram of the ring-shaped knife edge and the ring-shaped liquid tank.

[0034] Figure 10 Figure 10 is a structural schematic diagram of the reloading mechanism and the fine filter module.

[0035] Figure 11 Figure 11 is a structural schematic diagram of the reloading mechanism.

[0036] Figure 12 Figure 12 is a structural schematic diagram of the limiting column and the limiting plate.

[0037] Figure 13 Figure 13 is a structural schematic diagram of the strip-shaped rotating block and the driving short shaft.

[0038] Figure 14 Figure 14 is a structural schematic diagram of the second shell provided with the filter plates.

[0039] Figure 15 Figure 15 is a structural schematic diagram of the filter plates.

[0040] 11, first shell, 12, second shell, 13, air inlet, 14, air outlet, 15, square flange, 16, notch, 17, bent plate, 18, square gasket, 19, baffle, 110, clamping groove, 111, blocking plate, 112, side plate, 113, wind speed sensor, 114, temperature and humidity sensor, 2, annular hoop, 21, first groove plate, 22, second groove plate, 23, L-shaped top plate, 24, clamping block, 31, annular tube, 32, injection interface, 33, sampling interface, 41, sterilization device, 42, sterilization controller, 43, signal interaction module, 44, power module, 5, fine filter module, 51, outer frame, 52, filter layer, 53, mesh plate, 54, annular knife edge, 55, annular liquid tank, 56, liquid tank glue, 6, replacement mechanism, 61, frame body, 62, placement rack, 63, first rotating rod, 64, second rotating rod, 65, connecting rod, 66, compression wheel, 67, limiting column, 68, limiting plate, 69, handle, 610, positioning screw, 611, sliding rail, 7, leak detection scanning mechanism, 71, vertical screw rod, 72, screw nut, 73, gas collection groove, 74, vertical rod, 75, leak detection interface, 76, strip-shaped rotating block, 77, driving short shaft, 78, sink, 8, air extractor, 81, baffle, 9, filter plate, 91, U-shaped groove, 92, partition plate, 93, mesh, 10, differential pressure sensor, 101, first differential pressure interface, 102, second differential pressure interface. DETAILED DESCRIPTION

[0041] The specific embodiments of the present application are described below to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, it is obvious that various changes are within the spirit and scope of the present application defined and determined by the appended claims, and all the inventions utilizing the concept of the present application are within the scope of protection.

[0042] Example 1

[0043] As Figures 1 to 3As shown, the modular filtration device of this scheme includes a first housing 11 and a second housing 12 with one end open. The openings of the first housing 11 and the second housing 12 are sealed and connected by a connecting mechanism. The other ends of the first housing 11 and the second housing 12 are respectively provided with an air inlet 13 and an air outlet 14. Inside the first housing 11, from the air inlet 13 to the opening, a sample release device, a sterilization module, and a fine filtration module 5 are arranged in sequence. The fine filtration module 5 is mounted on a changing mechanism 6. The changing mechanism 6 located at the rear end of the fine filtration module 5 is also provided with... The system includes a leak detection and scanning mechanism 7, and an exhaust fan 8 or several filter plates 9 can be selectively installed inside the second housing 12. This solution adopts a modular structural design, which allows for convenient replacement of the filter device and the exhaust fan 8. When connected to the exhaust fan 8, it can be used as a clean ventilation device for epidemic prevention in the ward. The exhaust fan 8 has a baffle plate 81 at its air inlet to facilitate the uniform distribution of airflow. When connected to the filter plates 9, it can be used as a civil defense device for air defense, thus enabling this solution to achieve flexible changes in wartime air defense, epidemic prevention, and peacetime transition.

[0044] Example 2

[0045] like Figures 4 to 6 As shown, this embodiment is a further limitation based on embodiment 1. Both the openings of the first housing 11 and the second housing 12 are provided with outwardly bent flanges welded together to form square planes. Each square plane has an outwardly protruding square flange 15. The square flange 15 of the first housing 11 has several notches 16, and the square flange 15 of the second housing 12 has several bent plates 17 that mate with the notches 16 for docking and positioning. The connecting mechanism is an annular clamp 2 fixedly fitted onto the square flange 15, and a square sealing gasket 18 is provided between the annular clamp 2 and the square flange 15. Specifically, square sealing gaskets 18 are adhered to the square planes of both the first housing 11 and the second housing 12. The square sealing gaskets 18 have adhesive backing, allowing a portion of the square sealing gasket 18 to be directly adhered to the sealing surface behind the square planes of the first housing 11 and the second housing 12.

[0046] The annular clamp 2 is formed by two clamps joined together. The clamps include a first groove plate 21, and a second groove plate 22 is hinged to both ends of the first groove plate 21. An L-shaped top plate 23 is provided at the hinge. A baffle 19 is provided at the corner of the square flange 15 to abut against the L-shaped top plate 23. Clamping blocks 24 are provided in both the first groove plate 21 and the second groove plate 22. Several slots 110 that engage with the clamping blocks 24 are provided on the square flange 15. The second groove plates 22 at both ends of the two clamps are respectively joined together and fixed to the upper bending plate 17 by bolts.

[0047] The working principle of the connecting mechanism is explained in detail below:

[0048] This solution achieves a sealed connection between the first housing 11 and the second housing 12 through the cooperation of the square sealing gasket 18 and the annular clamp 2. The annular clamp 2 is structurally stable and easy to assemble and disassemble. During installation, the clamping block 24 on the first groove plate 21 engages with the slot 110 on the square flange 15. Then, by rotating the second groove plate 22, the clamping block 24 on the second groove plate 22 engages with the slot 110 on the square flange 15. Simultaneously, as the second groove plate 22 rotates, the L-shaped top plate 23 abuts against the baffle 19. As the rotation angle increases, the distance between the hinge point and the apex of the baffle 19 increases, causing the hinge point to move downwards, i.e., the first groove plate 21 moves downwards. This causes the first groove plate 21 to press the square sealing gasket 18. With the advantage of the first groove plate 21 pressing the two sides together, the clamping block 24 on the second groove plate 2 engages with the slot 110. The second groove plate 22 is then secured with bolts, pressing the square sealing gasket 18, thus achieving a good splicing and sealing effect.

[0049] Example 3

[0050] like Figure 1 and Figure 3 As shown, this embodiment is a further limitation based on embodiment 1. A bending plate is provided at the air inlet 13. The bending plate includes several baffle plates 111 parallel to the air inlet 13 and side plates 112 perpendicular to the baffle plates 111. Several flow holes are evenly distributed on the side plates 112. The sample release device includes an annular tube 31. The annular tube 31 is located at the air inlet 13 outside the bending plate. Several air holes are evenly distributed in the circumferential direction of the annular tube 31. An injection port 32 and a sampling port 33 are provided on the housing. The injection port 32 is connected to the annular tube 31, and the sampling port 33 is connected to the inner cavity of the first housing 11 located inside the bending plate.

[0051] The baffle plate 111 can be used to block the explosive shock wave transmitted from the air inlet port, thereby avoiding damage to the internal components of the housing, while the flow holes on the side plate 112 facilitate the entry of gas into the housing; the external sample generating equipment can inject sample gas through the injection interface 32 and diffuse it evenly through the annular pipe 31, and then obtain the evenly diffused sample gas through the sampling interface 33, and detect it through the external detection instrument, thereby obtaining the sample gas concentration at the front end of the fine filter module 5.

[0052] Example 4

[0053] like Figure 3 and Figure 7As shown, this embodiment is a further limitation based on embodiment 3. A wind speed sensor 113 is provided at the air inlet 13 located on the outside of the bending plate, and the detection end of the wind speed sensor 113 is directly facing the recess of the bending plate, reducing the impact of the bending plate on the accuracy of detection due to the interference of the airflow. A temperature and humidity sensor 114 and a differential pressure sensor 10 are provided at the air inlet 13 located on the inside of the bending plate. The first interface end of the differential pressure sensor 10 is connected to the inner cavity of the housing located at the front end of the fine filter module 5. A first differential pressure interface 101 connected to the second interface end of the differential pressure sensor 10 is provided on the first housing 11. A second differential pressure interface 102 connected to the first differential pressure interface 101 is provided on the second housing 12 near the air outlet 14. The sterilization module includes a plurality of ozone-generating sterilization devices 41. The plurality of sterilization devices 41 are respectively arranged inside the plurality of baffles 111. The plurality of sterilization devices 41 are all electrically connected to the sterilization controller 42.

[0054] This solution can monitor the wind speed and temperature / humidity of the air inlet 13 in real time. Simultaneously, the differential pressure sensor 10 can monitor the pressure difference between the air inlet 13 and the air outlet 14 in real time. When the pressure difference reaches a certain value, it indicates that the fine filter module 5 and / or the filter plate 9 is clogged, allowing for timely replacement and preventing low filtration efficiency and poor filtration effect due to blockage. The sterilization controller 42 can control the sterilization device 41 to generate ozone to sterilize the gas passing through the flow holes. All openings of the sterilization controller 42 are sealed with sealant to prevent air leakage. The sterilization controller 42 also has ozone monitoring and fault alarm functions. Furthermore, the signals from the wind speed sensor 113, temperature / humidity sensor 114, differential pressure sensor 10, and sterilization controller 42 can all be wirelessly connected to a control center or the Internet of Things (IoT), enabling remote monitoring and control of the equipment.

[0055] Example 5

[0056] like Figure 8 and Figure 9 As shown, this embodiment is a further limitation based on embodiment 1. The fine filter module 5 is preferably a high-efficiency particulate air (HEPA) filter. The fine filter module 5 includes an outer frame 51, with a handle on the top of the outer frame 51. A filter layer 52 is disposed inside the outer frame 51. The filter layer 52 is formed by folding a whole sheet of filter paper several times and laying it in a W shape inside the outer frame 51. This arrangement not only ensures that each part is filtered by a single layer of filter paper, but also greatly increases the air passage area. The two ends of the filter layer 52 are flattened by mesh plates 53. The mesh plate 53 located at the rear end of the filter layer 52 abuts against the outer frame 51. Preferably, there is a gap between the mesh plate 53 located at the front end of the filter layer 52 and the outer frame 51, so that the mesh plate 53 and the outer frame 51, as well as the filter layer 52 and the outer frame 51, can be sealed by injecting sealant.

[0057] An annular blade 54 is provided inside the first housing 11, and an annular liquid groove 55 is provided at the front end of the outer frame 51. The annular liquid groove 55 is filled with liquid groove adhesive 56, which has the characteristics of being jelly-like, non-flowing, elastic, not easily damaged, and having a certain degree of adhesion. In this solution, the fine filter module 5 can be driven forward by the replacement mechanism 6 to seal and connect the annular liquid groove 55 with the annular blade 54, and seal and bond the annular blade 54 with the liquid groove adhesive 56 in the annular liquid groove 55. The sealing effect is good and it is not easy to fail. At this time, the fine filter module 5 is installed in place, and the gas inside the first housing 11 can only pass through the filter layer 52, thereby filtering the particles in the gas.

[0058] Example 6

[0059] like Figures 10 to 12 As shown, this embodiment is a further limitation based on embodiment 5. The replacement mechanism 6 includes a frame 61 that slides with the inner wall of the first housing 11 via a slide rail 611. The front end of the frame 61 is provided with a placement rack 62 for placing the fine filter module 5. The rear end of the frame 61 is provided with a connecting rod 65 pressing mechanism for fixing the fine filter module 5. The connecting rod 65 pressing mechanism includes a first rotating rod 63 and a second rotating rod 64. The first rotating rod 63 and the second rotating rod 64 are both hinged to both sides of the frame 61, and a connecting rod 65 is hinged between the first rotating rod 63 and the second rotating rod 64. A pressing wheel 66 is provided at the hinge point between the first rotating rod 63 and the second rotating rod 64 and the frame 61. A limit post 67 is provided on the outer edge of the pressing wheel 66. A limit plate 68 that abuts against the limit post 67 is provided inside the first housing 11. The two first rotating rods 63 are connected by a handle 69. The first rotating rods 63 are detachably connected to the frame 61 via positioning screws 610.

[0060] This solution enables convenient disassembly and assembly of the fine filter module 5 via the replacement mechanism 6. In practice, first remove the second housing 12, then remove the positioning screw 610. Manually drive the first rotating rod 63 and the second rotating rod 64 to rotate synchronously via the handle 69, causing the limiting post 67 to disengage from the limiting plate 68. Then pull the frame 61 outward and replace the fine filter module 5 on the placement frame 62. Push the frame 61 back into the first housing 11, and synchronously rotate the first rotating rod 63 and the second rotating rod 64 via the handle 69, causing the pressure wheel 66 to rotate and the limiting post 67 to abut against the limiting plate 68. This causes the frame 61 to press forward, moving the fine filter module 5 forward until the annular liquid tank 55 and the annular knife edge 54 are sealed together. At this point, the fine filter module 5 is installed in place. Finally, fix the first rotating rod 63 to the frame 61 using the positioning screw 610.

[0061] Example 7

[0062] like Figure 3 and Figure 11As shown, this embodiment is a further limitation based on embodiment 6. The leak detection scanning mechanism 7 includes a vertical lead screw 71 mounted on the frame 61. A lead screw nut 72 is fitted on the vertical lead screw 71. A gas collection groove 73 with its opening facing the fine filter module 5 is provided on the lead screw nut 72. The gas collection groove 73 is flat and its horizontal length matches the horizontal length of the fine filter module 5. Both ends of the gas collection groove 73 are slidably engaged with the upright 74. The bottom of the gas collection groove 73 is an arc shape with a concave center. The center of the bottom of the gas collection groove 73 is connected to the leak detection interface 75 on the first housing 11 through a flexible hose.

[0063] The leak detection scanning mechanism 7 can collect sample gas from different locations at the rear end of the fine filter module 5, and perform detection and analysis through an external testing instrument, thereby achieving the purpose of detecting leaks in the fine filter module 5, so as to replace the failed fine filter module 5 in a timely manner. Specifically, during the leak detection scanning, the rear end of the fine filter device is connected to the exhaust fan 8, the leak detection interface 75 is connected to an external testing instrument, and the sample gas passing through the fine filter module 5 can be collected through the gas collection tank 73. At the same time, the vertical screw 71 is rotated to drive the gas collection tank 73 to rise and fall, thereby collecting sample gas from different locations at the rear end of the fine filter module 5. When the detection value at the rear end exceeds the standard, it indicates that there are holes or insufficient edge sealing in the fine filter module 5. At this time, the fine filter module 5 is replaced until the detection value at the rear end reaches the standard.

[0064] like Figure 13 As shown, a strip-shaped rotating block 76 is provided at the end of the vertical lead screw 71, and a drive short shaft 77 is embedded in the first housing 11. A groove 78 that cooperates with the strip-shaped rotating block 76 is provided on the drive short shaft 77, and the width of the groove 78 is less than the length of the strip-shaped rotating block 76, while the width of the groove 78 is greater than the width of the strip-shaped rotating block 76. When the fine filter module 5 is installed in place, the vertical lead screw 71 and the drive short shaft 77 are rotatably connected through the cooperation of the strip-shaped rotating block 76 and the groove 78, so that the operator can move the gas collection tank 73 up and down by rotating the drive short shaft 77 on the first housing 11. When the fine filter module 5 is being replaced, the strip-shaped rotating block 76 can automatically slide out from the groove 78, thereby separating the vertical lead screw 71 from the drive short shaft 77.

[0065] Specifically, there is a clearance tolerance between the strip-shaped rotating block 76 and the drive short shaft 77. The drive short shaft 77 and the vertical lead screw 71 are not on the same center. When the strip-shaped rotating block 76 on the vertical lead screw 71 is inserted into the sink 78, because the sink 78 is wider than the strip-shaped rotating block 76, the side of the strip-shaped rotating block 76 will contact the side of the sink 78 during rotation and drive it to rotate. During the rotation process, since they are not on the same center, there is relative sliding between the side of the strip-shaped rotating block 76 and the side of the sink 78. Its motion is based on the principle of a double crank slider mechanism.

[0066] Example 8

[0067] like Figure 14 and Figure 15 As shown, this embodiment is a further limitation based on embodiment 1. Several filter plates 9 are arranged sequentially inside the second housing 12. Adjacent filter plates 9 are arranged in a V-shape, which helps to increase the number of filter plates 9 inside the housing, thereby increasing the area of ​​the windward surface of the filter plates 9 and improving the filtration efficiency. One end of two adjacent filter plates 9 is sealed and connected by a U-shaped groove 91. The filter plates 9 are hollow inside, and two partitions 92 parallel to the plate surface are provided in the gap inside the filter plates 9. Several mesh holes 93 are arranged on the plate surface of the filter plates 9 and the partitions 92. The cavity between the plate surface of the filter plates 9 and the partitions 92 is filled with activated carbon particles, and a cavity layer is formed between the two partitions 92. The filter plates 9 adopt a combination of carbon layer, cavity layer, and carbon layer, so that the gas passing through the filter plates 9 can be rebalanced in the cavity layer, thereby improving the filtration effect.

[0068] In conjunction with embodiments 1-8 above, the first housing 11 and the second housing 12 of this solution are integrally formed by spinning the inlet end housing, the sealing blade, and the straight section housing. When not in use, the air inlet 13 and the air outlet 14 can be closed by the end cap. The drive short shaft 77 is sealed through the bushing and sealing ring on the first housing 11 and is limited by the clamping plate. The drive short shaft 77 has an upper and lower movement margin to compensate for production and installation errors. The outer end of the drive short shaft 77 is provided with a countersunk hole of a specific shape to facilitate connection and rotation with a special handle. It can also be sealed with a sealing cap when not in use.

[0069] The injection interface 32, sampling interface 33, leak detection interface 75, first differential pressure interface 101, and second differential pressure interface 102 of this solution all adopt self-closing quick connectors. The connector automatically opens after the male and female connectors are paired and plugged in, and automatically closes after the male and female connectors are separated. At the same time, the connector is covered with a sealing cap when not in use to prevent air leakage. The connection between the connector and the shell and / or outer shell is sealed with glue. After the glue solidifies quickly, it can not only seal but also strengthen the connection.

[0070] In summary, this solution adopts a modular structural design, and the first housing 11 and the second housing 12 are easily assembled through a connecting mechanism. The first housing 11 integrates a fine filtration module 5, a sterilization module, and various monitoring components, and has functions such as fine filtration, biological sterilization, in-situ leak detection, airflow detection, resistance monitoring, sterilization monitoring, fault alarm, real-time wireless data transmission, and replacement of the fine filtration module 5. At the same time, the fine filtration module 5 is easy to replace. The second housing 12 can selectively be equipped with a filter plate 9 or an exhaust fan 8. The filter plate 9 is generally only used in wartime or in the event of a toxic gas leak, while the exhaust fan 8 is generally used for ventilation in temporary isolation wards and negative pressure wards, thereby achieving flexible changes in wartime air defense, epidemic prevention, and peacetime conversion.

Claims

1. A modular filtration device, characterized in that, The device includes a first housing and a second housing with one end open. The openings of the first housing and the second housing are sealed together by a connecting mechanism. The other ends of the first housing and the second housing are respectively provided with an air inlet and an air outlet. Inside the first housing, from the air inlet to the opening, a sample release device, a sterilization module, and a fine filtration module are arranged in sequence. The fine filtration module is arranged on a changing mechanism. The changing mechanism located at the rear end of the fine filtration module is also provided with a leak detection scanning mechanism. The second housing may selectively be provided with an exhaust fan or several filter plates. Both the first housing and the second housing have outwardly protruding square flanges at their openings. The square flange of the first housing has several notches, and the square flange of the second housing has several bent plates that mate with the notches and achieve docking and positioning. The connecting mechanism is an annular clamp fixedly fitted on the square flange, and a square sealing gasket is provided between the annular clamp and the square flange. The annular clamp is formed by two clamps joined together. Each clamp includes a first groove plate, with a second groove plate hinged to both ends of the first groove plate. An L-shaped top plate is provided at the hinge. A baffle that abuts against the L-shaped top plate is provided at the corner of the square flange. Clamping blocks are provided in both the first and second groove plates. Several slots that engage with the clamping blocks are provided on the square flange. The second groove plates at both ends of the two clamps are joined together and fixed to the bending plate by bolts. The replacement mechanism includes a frame that slides against the inner wall of the first housing. The front end of the frame is provided with a placement rack for placing the fine filter module, and the rear end of the frame is provided with a connecting rod clamping mechanism for fixing the fine filter module. The connecting rod clamping mechanism includes a first rotating rod and a second rotating rod. The first rotating rod and the second rotating rod are both hinged to both sides of the frame, and a connecting rod is hinged between the first rotating rod and the second rotating rod. A clamping wheel is provided at the hinge point between the first rotating rod and the second rotating rod and the frame. A limit post is provided on the outer edge of the clamping wheel. A limit plate is provided inside the first housing that abuts against the limit post. The two first rotating rods are connected by a handle. The first rotating rod is detachably connected to the frame by a positioning screw. The leak detection scanning mechanism includes a vertical lead screw mounted on a frame, with a strip-shaped rotating block at the end of the vertical lead screw. A drive short shaft is embedded in the first housing, and a groove that cooperates with the strip-shaped rotating block is provided on the drive short shaft. The width of the groove is less than the length of the strip-shaped rotating block, and the width of the groove is greater than the width of the strip-shaped rotating block.

2. The modular filter device according to claim 1, characterized in that, A bending plate is provided at the air inlet. The bending plate includes several baffles parallel to the air inlet and side plates perpendicular to the baffles. Several flow holes are evenly distributed on the side plates. The sample release device includes an annular tube located at the air inlet outside the bending plate. Several air holes are evenly distributed around the annular tube. An injection port and a sampling port are provided on the housing. The injection port is connected to the annular tube, and the sampling port is connected to the inner cavity of the first housing located inside the bending plate.

3. The modular filter device according to claim 2, characterized in that, A wind speed sensor is installed at the air inlet located on the outside of the bending plate, and a temperature and humidity sensor and a differential pressure sensor are installed at the air inlet located on the inside of the bending plate. The first interface end of the differential pressure sensor is connected to the inner cavity of the housing located at the front end of the fine filter module. The first housing is provided with a first differential pressure interface connected to the second interface end of the differential pressure sensor. The second housing near the air outlet is provided with a second differential pressure interface connected to the first differential pressure interface. The sterilization module includes several sterilization devices that can generate ozone. The several sterilization devices are respectively arranged inside several baffles. The several sterilization devices are all electrically connected to the sterilization controller.

4. The modular filter device according to claim 1, characterized in that, The fine filtration module includes an outer frame, a filter layer is disposed inside the outer frame, the two ends of the filter layer are clamped flat by a mesh plate, the mesh plate and the filter layer are sealed and connected to the outer frame around the perimeter, an annular knife edge is disposed inside the first housing, an annular liquid groove is disposed at the front end of the outer frame, the annular liquid groove is filled with liquid groove adhesive, and the replacement mechanism drives the fine filtration module to move forward and seals the annular liquid groove with the annular knife edge.

5. The modular filter device according to claim 1, characterized in that, A screw nut is fitted onto the vertical screw, and a gas collection slot with an opening facing the fine filter module is provided on the screw nut. The gas collection slot is flat, and its horizontal length matches the horizontal length of the fine filter module. Both ends of the gas collection slot are slidably engaged with the upright. The bottom of the gas collection slot is an arc shape with a concave center. The center of the bottom of the gas collection slot is connected to a leak detection interface on the first housing via a flexible hose.

6. The modular filter device according to claim 1, characterized in that, Several filter plates are arranged sequentially inside the second housing. Adjacent filter plates are arranged in a V-shape, and one end of adjacent filter plates is sealed and connected by a U-shaped groove. The filter plates are hollow inside, and two partitions parallel to the plate surface are provided in the gap between the filter plates. Several mesh holes are arranged on the plate surface and the partitions. Activated carbon particles are filled in the cavity between the plate surface and the partitions. A cavity layer is formed between the two partitions.

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