Bag-in and bag-out filter

Abstract

The utility model discloses a bag-in and bag-out filter, and relates to the technical field of ventilation safety protection equipment. Comprising a shell provided with an air inlet and an air outlet in the width direction, a filter installed in the shell and located between the air inlet and the air outlet, and an aerosol diffusion device installed between the air inlet and an inlet of the filter and used for injecting aerosol into the shell. The downstream gas sampling device and the bacterial slice placing device are arranged between the outlet of the filter and the air outlet, and the downstream gas sampling device is used for collecting gas filtered by the filter; the opening end of the single-head sealing pipe is inserted into the connecting hole of the shell, the single-head sealing pipe is connected with the connecting hole in a sealed mode, the multi-section mesh pipe is connected with the opening of the single-head sealing pipe, meshes are formed in the pipe wall of the multi-section mesh pipe, the head and the tail of the mesh pipe are detachably connected in sequence, and the fungus slices are placed in the mesh pipe. The bag-in and bag-out filter is more convenient and safer to use and more efficient in air exhaust.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation safety protection equipment, in particular to a bag-in-bag-out filter. Background Art

[0002] The filter can filter out pathogenic microorganisms, dust and other harmful substances. The bag-in-bag-out filter is a special high-efficiency ventilation safety protection equipment for high-biological risk facilities. It is an important part of biosafety facilities. Its function is to filter out highly pathogenic microorganisms transmitted by aerosols in the air, filter and intercept them in the system pipeline to prevent the overflow of pathogenic microorganisms, effectively prevent secondary air pollution, protect the safety of the surrounding environment, and ensure the safety of operators.

[0003] Existing bag-in-bag-out filters lack gas diffusers at the air inlet, or their design is overly complex, allowing high-speed airflow to enter the filter directly, resulting in a small ventilation area and low filtration efficiency. Existing bag-in-bag-out filters lack aerosol diffusion devices or use a rigid tube to direct aerosols into the center of the device, resulting in uneven diffusion and poor diffusion. Existing filter clamping devices often utilize a planar four-bar linkage, which requires a large change in clamping force with varying stroke and cannot adjust the clamping force to a more appropriate level based on sealing material. Most existing bag-in-bag-out filters utilize a handle to facilitate filter removal. However, due to the heavy weight of the filter, the handle can easily break, preventing removal. Furthermore, inaccurate filter positioning can occur. Existing bag-in-bag-out filters have a complex scanning and leak detection mechanism, employing two guide shafts and a screw drive. In actual operation, thorough disinfection of equipment often requires placing bacterial chips inside the device to assess disinfection effectiveness. Existing bag-in-bag-out filters fail to consider this placement issue, making field operation difficult or even inappropriate. In terms of transmission, the screw transmission resistance is relatively large, and there is a lot of room for optimization and improvement. The corners of existing inspection doors are mostly arc transitions. The disadvantage is that bolt fixing points cannot be added to the corners of the inspection doors, and the compression force is not advantageous. When the existing bag-in-bag-out filter's pressure differential pipeline is sterilized, it is generally provided with an additional sterilization channel. The channel is separately equipped with a quick plug, and this plug is not compatible with the in-situ disinfection port of the equipment's high-efficiency filter. The existing bag-in-bag-out filter has no pressure relief port, which poses a safety hazard.

[0004] In summary, how to optimize the problems existing in the safety, reliability and use of bag-in, bag-out filters is an issue that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The utility model aims to provide a bag-in-bag-out filter, which is more convenient and safe to use and has more efficient exhaust.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A bag-in, bag-out filter comprises a shell provided with an air inlet and an air outlet in the width direction, a filter installed in the shell and located between the air inlet and the air outlet, an aerosol diffusion device installed between the air inlet and the filter inlet for injecting aerosol into the shell, a downstream gas sampling device and a bacterial sheet placement device installed between the filter outlet and the air outlet, the downstream gas sampling device being used to collect gas filtered by the filter, the bacterial sheet placement device comprising a single-head sealed tube having an open end inserted into a connecting hole of the shell and sealedly connected to the connecting hole, a multi-section mesh tube connected to the open end of the single-head sealed tube and having mesh holes on the tube wall, the head and tail of the mesh tube being detachably connected in sequence, and bacterial sheets being placed in the mesh tube.

[0008] Optionally, a partition perpendicular to the axis of the mesh tube is provided in the mesh tube, a plug is connected to the end of the last mesh tube, the head and tail of the mesh tube are directly connected by an internal thread, and the single-head sealing tube and the connecting hole are connected by a perforated chuck.

[0009] Optionally, the shell is provided with an upstream gas sampling port between the aerosol diffusion device and the filter inlet; and also includes a gas failure detection mechanism for judging that the injected aerosol is unqualified when the aerosol concentration collected from the upstream gas sampling port is less than a set threshold.

[0010] Optionally, the downstream gas sampling device includes a scanning leak detection device located at the front end of the bacterial sheet placement device and a total filtration efficiency detection port located at the rear end of the bacterial sheet placement device; and also includes an installation detection mechanism for judging that the filter is incorrectly installed when the difference between the aerosol concentration collected from the scanning leak detection device and the aerosol concentration collected from the total filtration efficiency detection port is greater than a set value.

[0011] Optionally, the scanning leak detection device includes a scanning tube arranged vertically and having a vertical slot, a driving mechanism for driving the scanning tube to move along the depth direction of the shell, and a glue outlet pipe connected to the scanning tube, the aerosol outlet of the glue outlet pipe is connected to the aerosol concentration detection device outside the shell, and the vertical slot is oriented toward and close to the central window of the filter.

[0012] Optionally, the installation detection mechanism includes:

[0013] a concentration detection unit for dynamically detecting the aerosol concentration corresponding to the real-time position of the scanning tube during its movement;

[0014] A position sensor for detecting the real-time position of the scanning tube;

[0015] a data acquisition unit connected to the aerosol concentration and position sensors and configured to acquire the corresponding relationship between the real-time position and real-time concentration of the scanning tube;

[0016] A position detection unit is used to find out the aerosol collection position information corresponding to when the aerosol concentration is greater than a set value according to the data collection unit.

[0017] Optionally, the aerosol diffusion device includes an aerosol main injection tube connected to the aerosol injection port on the shell, a multi-section aerosol diversion tube with one end connected to the outlet of the aerosol main injection tube, and an end injection tube connected to the other end of the aerosol diversion tube. The aerosol diversion tube and the end injection tube are on a vertical plane parallel to the air inlet surface of the filter, and the multi-section aerosol diversion tubes are spaced at a set angle.

[0018] Optionally, it also includes a gas diffusion turbulence plate arranged between the air inlet and the aerosol diffusion device, the gas diffusion turbulence plate is parallel to the cross-section perpendicular to the axis of the air inlet, the gas diffusion turbulence plate is evenly distributed with air holes, and there is a gap between the edge of the gas diffusion turbulence plate and the inner wall of the shell, the end glue injection tube and the aerosol diversion tube are both provided with air holes, and the area surrounded by the end glue injection tube covers the entire air inlet surface of the filter.

[0019] Optionally, an inspection door is installed on the inspection port of the shell, and connecting bolts are provided on the panel on the outer periphery of the inspection port. The right-angled side of the inspection door adopts an equilateral chamfered type, and a connecting sleeve is provided on the triangular plane of the inspection door. The connecting sleeve is mounted on the connecting bolt, and the cylinder of the connecting sleeve is a conical hole with an increasing inner diameter at the end close to the panel.

[0020] Optionally, a pressure relief device is provided on the housing, and the pressure relief device includes:

[0021] a pressure sensor for detecting the pressure in the housing;

[0022] A high-efficiency filter device is connected to the pressure sensor and the pressure relief port of the shell, and is used to control the pressure relief of the bag-in-bag-out filter when it is detected that the pressure difference between the pressure inside the shell and the external pressure is greater than a set value before opening the inspection door.

[0023] The beneficial effect of the present invention is that an air inlet and an air outlet are provided in the width direction of the shell, and the air inlet and the air outlet are opposite to each other. The filter is installed in the shell and is located between the air inlet and the air outlet. The gas enters from the air inlet and is filtered by the filter and then discharged from the air outlet. The aerosol diffusion device is installed between the air inlet and the filter inlet. During the leak detection test, the aerosol diffusion device evenly disperses the aerosol into the upstream area of ​​the filter. The downstream gas sampling device is installed between the filter outlet and the air outlet. The downstream gas sampling device is used to collect the gas after filtration by the filter to detect the concentration of the aerosol after filtration. The aerosol concentration is used to judge whether the filter is tightly attached to the sealing surface of the shell when installed, and whether there is a leakage problem at the connection between the filter and the sealing surface of the shell.

[0024] To ensure that the disinfection effect of the bag-in-bag-out filter meets the standard, the bag-in-bag-out filter of this application is designed with a special bacterial plate placement device, so that the thoroughness of disinfection can be directly checked inside the device. This design helps to improve the reliability and safety of disinfection.

[0025] The bacterial sheet placement device consists of a single-ended sealed tube and a multi-section mesh tube. The single-ended sealed tube has a sealed opening at one end and an open end at the other. The open end is inserted into the connection hole of the housing and sealed therewith. The first section of the mesh tube is connected to the open end of the single-ended sealed tube. The mesh tubes are connected end to end in a removable manner, facilitating easy placement of bacterial sheets in different locations during bag-in-bag-out filter in-situ disinfection. The mesh tube wall has mesh holes. This design ensures uniform distribution of the disinfecting gas, improving test accuracy.

[0026] To place the bacterial slices, remove the mesh tube to be placed; place the bacterial slices inside the mesh tube; and connect the mesh tube directly or indirectly to the single-end sealed tube. Once the bacterial slices are placed, the disinfectant gas can enter through the mesh holes in the mesh tube wall and come into contact with the bacterial slices. The changes in the bacterial slices can then be used to assess the thoroughness of disinfection.

[0027] The bag-in-bag-out filter provided by the utility model is equipped with a special bacterial sheet placement device, which not only simplifies the placement and replacement process of the bacterial sheets, but also improves the accuracy of the disinfection test and the convenience of operation, making the on-site disinfection test operation more standardized and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0029] Figure 1This is a structural diagram of a bag-in, bag-out filter provided in a specific embodiment of the present invention;

[0030] Figure 2 for Figure 1 A top view of

[0031] Figure 3 for Figure 1 Left view of;

[0032] Figure 4 for Figure 1 Right view of;

[0033] Figure 5 for Figure 1 Cross-sectional view

[0034] Figure 6 Schematic diagram of the structure of the diffusion turbulence plate;

[0035] Figure 7 Schematic diagram of the structure of the aerosol diffusion device;

[0036] Figure 8 It is a structural diagram of a scanning leak detection device;

[0037] Figure 9 It is an axonometric view of the scanning leak detection device;

[0038] Figure 10 This is a structural diagram of the access door;

[0039] Figure 11 This is a partial schematic diagram of the corner of the inspection door;

[0040] Figure 12 This is the axonometric view of the access door;

[0041] Figure 13 This is a schematic diagram of the structure of the bacterial sheet placement device;

[0042] Figure 14 This is an axonometric view of the device for placing bacterial slices;

[0043] Figure 15 It is a structural schematic diagram of the pressing device;

[0044] Figure 16 is a cross-sectional view of the pressing device;

[0045] Figure 17 This is a diagram of the use status of the pressing device;

[0046] Figure 18 This is a diagram of the non-compression state of the compression device;

[0047] Figure 19 It is a compression state diagram of the compression device;

[0048] Figure 20 It is a structural diagram of the positioning and pulling device;

[0049] Figure 21 A schematic diagram of the positioning and pulling out device;

[0050] Figure 22 Schematic diagram of the structure of the pull-out rod;

[0051] Figure 23 This is the status diagram after the filter is installed;

[0052] Figure 24 This is the state diagram after the filter is pulled out.

[0053] Reference numerals:

[0054] 1-zero leakage valve, 2-upstream gas sampling port, 3-disinfection inlet, 4-aerosol injection port, 5-inspection door, 6-mechanical differential pressure gauge, 7-differential pressure pipeline, 8-scanning detection port, 9-aerosol outlet, 10-bacteria placement device, 11-disinfection outlet, 12-total filtration efficiency detection port, 13-high efficiency filter device, 14-bracket, 15-electronic differential pressure gauge, 16-gas diffusion turbulent plate, 17-aerosol diffusion device, 18-pressing device, 19-positioning pull-out device, 20-scanning leak detection device, 21-filter, 22-sealing surface, 23-panel, 51-inspection door body, 52-fixed foot assembly welding, 521-triangular plane, 522-U-shaped reinforcement rib, 523-conical hole, 71-card sleeve ball valve one, 72-card sleeve ball valve two, 73-card sleeve ball valve three, 101-single head sealing tube, 102-partition, 1 03-mesh tube, 104-hole chuck, 105-inner thread, 106-plug, 161-stamped mesh plate, 162-support bar, 171-horizontal single-sided straight tube with holes, 172-quick-release chuck joint, 173-five-way joint, 174-three-way joint, 175-longitudinal single-sided straight tube with holes, 181-U-shaped pressure plate, 182-positioning sleeve, 183-preload spring, 184-rotating shaft, 185-fixed Position piece, 186-tightening nut, 187-bolt, 188-elliptical cam mechanism, 189-reinforcement plate, 1810-fixing seat, 1811-fixing nut, 191-support seat, 192-pull-out rod, 201-rectangular frame, 202-scanning tube, 203-plastic air duct, 204-fixing block, 205-ball screw pair, 206-handwheel, 207-tank chain, 208-skeleton oil seal sealing seat. DETAILED DESCRIPTION

[0055] The core of the utility model is to provide a bag-in-bag-out filter, which is more convenient and safe to use and has more efficient exhaust.

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0057] Please refer to Figures 1 to 24 , which is a schematic diagram of a bag-in-bag-out filter provided by a specific embodiment of the present invention.

[0058] In a specific embodiment, the bag-in-bag-out filter provided by the present invention includes a shell provided with an air inlet and an air outlet in the width direction, a filter 21 installed in the shell and located between the air inlet and the air outlet, an aerosol diffusion device 17 installed between the air inlet and the inlet of the filter 21 for injecting aerosol into the shell, a downstream gas sampling device and a bacterial sheet placement device 10 installed between the outlet of the filter 21 and the air outlet, the downstream gas sampling device is used to collect the gas after being filtered by the filter 21, and the bacterial sheet placement device 10 includes a single-head sealed tube 101 whose open end is inserted into the connecting hole of the shell and is sealed with the connecting hole, and a multi-section mesh tube 103 connected to the open end of the single-head sealed tube 101 and with a mesh on the tube wall. The head and tail of the mesh tube 103 are detachably connected in sequence, and the bacterial sheets are placed in the mesh tube 103.

[0059] In the above structure, the bag-in-bag-out filter is an efficient and safe gas filtration system, including a shell, a filter 21, an aerosol diffusion device 17, a downstream gas sampling device and a bacterial sheet placement device 10. The shell is installed on the bracket 14. The shell can adopt an integrated continuous welding process and a microporous bubble-free design. The weld of the integrated continuous welding process is continuous and not disconnected, and can also effectively reduce the generation of bubbles, thereby improving the welding quality. It not only improves the strength and sealing of the shell, but also reduces the risk of equipment leakage, ensuring the long-term stable operation of the equipment.

[0060] The housing is provided with an air inlet and an air outlet across its width, facing each other. Zero-leakage valves 1 can be installed at these locations to isolate the bag-in and bag-out equipment during shutdown for in-situ disinfection or filter replacement 21, preventing leakage and protecting both operators and the environment. Filter 21 is installed within the housing between the air inlet and outlet. Gas enters through the inlet, is filtered by filter 21, and then is discharged through the outlet.

[0061] The aerosol diffusion device 17 is installed between the air inlet and the inlet of the filter 21 to evenly disperse the aerosol into the upstream area of ​​the filter 21 during the leak test.

[0062] The downstream gas sampling device is installed between the outlet of the filter 21 and the air outlet. The downstream gas sampling device is used to collect the gas after filtering by the filter 21 to detect the concentration of the aerosol after filtration, and to judge whether the filter 21 is installed correctly based on the aerosol concentration, that is, to judge whether the filter 21 is tightly attached to the shell sealing surface 22 when installed, and whether there is a leakage problem at the connection between the filter 21 and the shell sealing surface 22 based on the aerosol concentration.

[0063] In actual operation, in order to check whether the equipment is thoroughly disinfected, it is often necessary to place bacterial slices inside the equipment to reflect whether the disinfection effect meets the standards. For this purpose, the bag-in-bag-out filter of the present application is provided with a special bacterial slice placement device 10.

[0064] The bacterial slice placement device 10 includes a single-end sealed tube 101 and a multi-section mesh tube 103. The single-end sealed tube 101 has a sealed port at one end and an open port at the other end. The open port is inserted into the connection hole of the housing and is sealed and connected to the connection hole. The first section of the mesh tube 103 is connected to the open port of the single-end sealed tube 101. The mesh tubes 103 are connected end to end in sequence and are detachably connected, making it easy to place bacterial slices in different positions during bag-in-bag-out filter in-situ disinfection. The tube wall of the mesh tube 103 has mesh holes. Through the design of the mesh tube 103, the disinfecting gas can be evenly distributed, thereby improving the accuracy of the test.

[0065] To place the bacterial slices: Remove the mesh tube 103 where the bacterial slices are to be placed; place the bacterial slices inside the mesh tube 103; and directly or indirectly connect the mesh tube 103 to the single-end sealed tube 101. Once the bacterial slices are placed, the disinfectant gas can enter through the mesh holes in the mesh tube 103 and come into contact with the bacterial slices. The changes in the bacterial slices can then be used to assess the thoroughness of the disinfection.

[0066] The bag-in-bag-out filter provided by the present invention is equipped with a special bacterial sheet placement device 10, which not only simplifies the placement and replacement process of bacterial sheets, but also improves the accuracy of disinfection testing and the convenience of operation, making on-site disinfection testing operations more standardized and effective.

[0067] Based on the above-mentioned specific embodiments, a partition 102 perpendicular to the axis of the mesh tube 103 is provided in the mesh tube 103, a plug 106 is connected to the end of the last section of the mesh tube 103, the head and tail of the mesh tube 103 are directly connected by an internal thread 105, and the single-head sealing tube 101 and the connecting hole are connected by a perforated chuck 104.

[0068] In a specific embodiment, the partition 102 separates the mesh tube 103 into different areas, and each bacterial sheet is placed in a separate area. The partition 102 has a limiting effect on the bacterial sheets, preventing the bacterial sheets from moving and shifting in the mesh tube 103, thereby reducing mutual interference between bacterial sheets.

[0069] The end of the last mesh tube 103 is connected to a plug 106 , which blocks the end opening of the last mesh tube 103 to prevent the bacterial sheet from sliding out of the end opening.

[0070] The head and tail of the mesh tube 103 have external threads, and the internal thread 105 has internal threads. The mesh tube 103 and the internal thread 105 are connected by threads. The connection method is simple and reliable, easy to disassemble, and convenient to install and maintain.

[0071] The single-end sealing tube 101 and the connecting hole are connected via a perforated chuck 104 . This connection method can ensure the sealing of the connection and prevent gas or liquid leakage.

[0072] Based on the above-mentioned specific embodiments, the shell is provided with an upstream gas sampling port 2 between the aerosol diffusion device 17 and the inlet of the filter 21; and also includes a gas failure detection mechanism for judging that the injected aerosol is unqualified when the aerosol concentration collected from the upstream gas sampling port 2 is less than a set threshold.

[0073] In practical applications, ensuring a tight fit between filter 21 and housing sealing surface 22 to avoid leakage is crucial for ensuring the safety and effectiveness of the device. To this end, it is necessary to inject aerosol before filter 21 and monitor the concentration changes before and after filter 21. Aerosol injection and testing are crucial for determining whether filter 21 is correctly installed and whether there are any leaks. To ensure that the injected aerosol is qualified and effective, this application specifically incorporates a gas failure detection mechanism to ensure the quality and effectiveness of the aerosol.

[0074] An upstream gas sampling port 2 is provided between the filter 21 inlet and the aerosol diffusion device 17 for collecting aerosol samples in the area. The function of this sampling port is to monitor the state and concentration of the aerosol before it enters the filter 21.

[0075] Since the concentration of aerosols with very low concentrations does not change much before and after the filter 21, it is impossible to determine whether the cause is due to incorrect installation of the filter 21 or the low concentration itself not changing much. To this end, it is necessary to first eliminate the influence of the low concentration itself not changing much. When the aerosol concentration collected from the upstream gas sampling port 2 is less than the set threshold, for example, the aerosol concentration is less than 10μm / L, indicating that the aerosol injected into the device has no concentration or the concentration is too low, the gas failure detection mechanism will determine that the injected aerosol is unqualified and remind you to re-input qualified aerosol.

[0076] Based on the above embodiment, the aerosol concentration collected by the upstream gas sampling port 2 is detected to determine whether the injected aerosol is qualified, thereby ensuring that the filter 21 fits tightly with the sealing surface 22, thereby ensuring the safety and effectiveness of the installation of the filter 21.

[0077] Based on the above-mentioned specific embodiments, the downstream gas sampling device includes a scanning leak detection device 20 located at the front end of the bacterial sheet placement device 10 and a total filtration efficiency detection port 12 located at the rear end of the bacterial sheet placement device 10; and also includes an installation detection mechanism for judging that the filter 21 is incorrectly installed when the difference between the aerosol concentration collected from the scanning leak detection device 20 and the aerosol concentration collected from the total filtration efficiency detection port 12 is greater than a set value.

[0078] In practical applications, the downstream gas sampling device can ensure the correct installation and efficient operation of the filter 21 through two different detection methods: scanning the leak detection device 20 and the total filtration efficiency detection port 12. These two detection methods complement each other and jointly ensure the sealing and filtration efficiency of the filter 21.

[0079] The scanning leak detection device 20, located between the filter 21 and the bacterial sheet placement device 10, ensures the tightness and correct installation of the filter 21. This device manually or automatically detects aerosol concentration and scans back and forth between the housing backplate and the front panel 23, individually checking the connection between the filter 21 and the sealing surface 22. This monitors aerosol leaks, helping the operator locate the leak and make necessary positional or angular corrections. The ultimate goal is to ensure a tight fit between the filter 21 and the sealing surface 22, ensuring the tightness and correctness of the filter 21, thereby improving filtration efficiency and ensuring system safety.

[0080] The core of the design of the total filtration efficiency detection port 12 is to comprehensively evaluate the overall filtration efficiency and installation quality of the filter 21 by directly measuring the aerosol concentration at the outlet of the filter 21. The detection port is located between the bacterial sheet placement device 10 and the air outlet. Through the connection with the ventilation pipe, the gas sample at the center position is derived to determine whether the installation of the filter 21 and the sealing surface 22 is correct and ensure a close fit between the two. This design increases the safety and reliability of the equipment. Through the data feedback from the detection port, the installation status of the filter 21 can be evaluated and timely adjustments can be made to ensure the correct installation and sealing of the filter 21 to maintain the efficient operation of the system.

[0081] By simultaneously collecting aerosols through two independent yet complementary methods, the leak detector 20 and the total filtration efficiency test port 12, the installation condition of the filter 21 can be dually assessed. The test results are cross-checked to ensure their accuracy. This method provides a more comprehensive assessment of the performance of the filter 21, ensuring that the filter 21 maintains efficient and safe operation under various operating conditions.

[0082] Exemplarily, the installation quality and filtration efficiency of the filter 21 are verified by comparing the aerosol concentrations collected at two different locations. Specifically, by comparing the aerosol concentrations collected by the scanning leak detection device 20 and the total filtration efficiency detection port 12, it is possible to evaluate whether the installation of the filter 21 meets the standards. When the difference in aerosol concentration between the two detection points exceeds the preset threshold, it indicates that the test result is abnormal, which means that there is an installation error in the filter 21. Once an abnormality is detected, the installation detection agency can make a judgment and reminder in time so that appropriate corrective measures can be taken. This mechanism helps to promptly discover and correct problems that may arise during the installation of the filter 21, and prevent potential reductions in filtration efficiency and pollution risks. By ensuring the correct installation and efficient operation of the filter 21, the stable operation and filtration effect of the entire system are guaranteed.

[0083] Based on the above-mentioned specific embodiments, the scanning leak detection device 20 includes a scanning tube 202 arranged vertically and having a vertical slot, a driving mechanism for driving the scanning tube 202 to move along the depth direction of the shell, and a glue outlet pipe connected to the scanning tube 202. The aerosol outlet 9 of the glue outlet pipe is connected to the aerosol concentration detection device outside the shell, and the vertical slot is oriented toward and close to the center window of the filter 21.

[0084] In practical applications, the scanning tube 202 is used to perform vertical scanning along both ends of the filter 21 to efficiently and accurately detect possible leakage points. The scanning leak detection device 20 includes a scanning tube 202, a driving mechanism and a glue outlet hose.

[0085] The scanning tube 202 is arranged vertically, passing through the height of the filter 21, and performs a comprehensive scan along the width of the air outlet surface of the filter 21 to detect possible leaks. The scanning tube 202 is provided with a vertical slot, and a blank is left in the middle of the vertical slot, that is, the middle of the slot is not disconnected. This design plays a supporting role, strengthens the structure of the scanning tube 202, and reduces the possibility of deformation of the scanning tube 202 during operation. The aerosol sample is sucked in from the center window of the filter 21 for concentration detection. Through the vertical slot, the aerosol sample is sucked into the scanning tube 202 for concentration detection. In order to efficiently and accurately collect the aerosol sample escaping from the center window of the filter 21, the slot can be directed toward and close to the center window of the filter 21 to ensure the accuracy of the detection.

[0086] The drive mechanism drives the scanning tube 202 to reciprocate along the width of the air outlet surface of the filter 21, ensuring the continuity of the scanning process. This allows the scanning tube 202 to cover the entire air outlet surface of the filter 21, ensuring that the filter 21 is thoroughly inspected for leaks. The drive mechanism can be a ball screw 205, which is connected to the scanning inspection port 8 of the housing via a skeleton oil seal seat 208. One end of the ball screw 205 passes through the scanning inspection port 8 of the housing and is connected to a handwheel 206 or a drive motor to control the rotation of the ball screw 205. The scanning tube 202 is connected to the ball screw 205 via a fixed block 204, enabling the reciprocating movement of the scanning tube 202.

[0087] As part of the scanning leak detection device 20, the discharge hose is responsible for guiding the aerosol sample from the filter 21 and connecting it to the aerosol concentration detection device outside the shell to facilitate real-time monitoring of aerosol concentration changes. The discharge hose can be a plastic air duct 203, which usually has good chemical stability and corrosion resistance and is suitable for a variety of environmental conditions. The tank chain 207 connected to it provides a flexible connection method, which is convenient for arranging pipelines in space-constrained environments. Another option for the discharge hose is to use a hose, which usually has good flexibility, is easy to install and adapt to different layout requirements.

[0088] Preferably, the scanning leak detection device 20 includes a stable guide rail that facilitates the movement of the scanning tube 202. The bottom and top surfaces of the housing are each provided with a C-shaped groove, with the ends of the scanning tube 202 connected to the C-shaped grooves on the bottom and top surfaces, respectively. This design allows the scanning tube 202 to slide along the C-shaped groove, achieving a flexible movement path. The C-shaped groove provides a guide-like sliding structure that reduces friction during the movement of the scanning tube 202, ensuring smooth sliding.

[0089] A rectangular frame 201 is provided in the shell, and the edge of the frame also has a C-shaped groove. The two ends of the scanning tube 202 are respectively connected to the bottom and top surfaces of the rectangular frame 201. This structural design can provide better stability and load-bearing capacity. The addition of the rectangular frame 201 provides an additional support structure, which can reduce the vibration or deviation of the scanning tube 202 during movement.

[0090] Based on the above embodiment, the scanning leak detection device 20 takes into account the comprehensiveness of scanning, the collection efficiency of aerosol samples, and the compatibility with the aerosol concentration detection device to ensure that the sealing and performance of the filter 21 are effectively monitored and evaluated.

[0091] Based on the above specific embodiments, the installation detection mechanism includes:

[0092] A concentration detection unit for dynamically detecting the aerosol concentration corresponding to the real-time position of the scanning tube 202 during its movement;

[0093] A position sensor for detecting the real-time position of the scanning tube 202;

[0094] A data acquisition unit connected to the aerosol concentration and position sensor for acquiring the corresponding relationship between the real-time position and real-time concentration of the scanning tube 202;

[0095] The position detection unit is used to find out the aerosol collection position information corresponding to when the aerosol concentration is greater than a set value according to the data collection unit.

[0096] In practical applications, the concentration detection unit is responsible for dynamically detecting the aerosol concentration corresponding to the real-time position of the scanning tube 202 during its movement. This can be achieved specifically using an aerosol concentration measuring instrument, which can analyze aerosol particle size and determine concentration, and is suitable for sensors with different measurement ranges. The position sensor is used to detect the real-time position of the scanning tube 202. The sensor can be contact or proximity type, and can also be divided into linear position sensors, etc. The data acquisition unit is connected to the aerosol concentration and position sensor and is responsible for collecting the correspondence between the real-time position and real-time concentration of the scanning tube 202, converting the real-world signal into a digital signal, and storing the corresponding relationship data. Based on the data provided by the data acquisition unit, the position detection unit finds the aerosol collection position information corresponding to when the aerosol concentration is greater than the set value. The collected data is analyzed to determine the specific location where the aerosol concentration exceeds the standard, thereby determining the exact location where the filter 21 is incorrectly installed.

[0097] Based on the above embodiment, the entire installation and detection mechanism can realize real-time monitoring and detection of the installation status of the filter 21 through the coordinated work of these units, and can promptly discover the exact location where problems may occur in the installation process of the filter 21, and make targeted adjustments to ensure the correct installation and effective operation of the filter 21.

[0098] Based on the above-mentioned specific embodiments, the aerosol diffusion device 17 includes an aerosol main injection tube connected to the aerosol injection port 4 on the shell, a multi-section aerosol diversion tube connected to the outlet of the aerosol main injection tube at one end, and an end injection tube connected to the other end of the aerosol diversion tube. The aerosol diversion tube and the end injection tube are on a vertical plane parallel to the air inlet surface of the filter 21. The multi-section aerosol diversion tubes are spaced at a set angle, and air holes are provided on both the end injection tube and the aerosol diversion tube.

[0099] In practice, the main aerosol injection tube is connected to the aerosol injection port 4 on the housing and serves as the primary channel for aerosol to enter the system. One end of a multi-section aerosol diversion tube is connected to the outlet of the main aerosol injection tube, diverting aerosol from the main injection tube to different terminal injection tubes. The terminal injection tubes, connected to the other end of the aerosol diversion tubes, are responsible for ultimately delivering the aerosol to the designated location.

[0100] The multiple sections of the aerosol diversion tubes are spaced at set angles. The aerosol diversion tubes and the terminal injection tubes are arranged on a vertical plane, which is parallel to the air inlet surface of the filter 21. The area enclosed by the terminal injection tubes covers the entire air inlet surface of the filter 21. This layout helps to evenly distribute the aerosol on the entire air inlet surface of the filter 21, avoids local concentrations that are too high or too low, and improves the filtering effect and the diffusion efficiency of the aerosol.

[0101] Exemplarily, the main aerosol injection tube is connected to the housing via a quick-release chuck joint 172. There are four aerosol diversion tubes, which are connected to the four aerosol diversion tubes via a five-way joint 173. The main aerosol injection tubes are spaced 90 degrees apart, with two running vertically and two running horizontally. The terminal injection tube is connected to the aerosol diversion tube via a three-way joint 174. The terminal injection tube includes a horizontal single-sided perforated straight tube 171 and a longitudinal single-sided perforated straight tube 175. These two tubes cover the entire air inlet surface of the filter 21, ensuring uniform distribution of aerosol on the air inlet surface of the filter 21.

[0102] In a preferred embodiment, the aerosol diffusion device 17 further includes an aerosol uniformity detection mechanism for detecting whether the aerosol concentration deviation at each point on the air inlet surface of the filter 21 is less than a set value. The aerosol uniformity detection mechanism includes:

[0103] a concentration detection unit for detecting aerosol concentrations at multiple measurement points in the upstream region of the filter 21;

[0104] The distribution detection unit is connected to the concentration detection unit and is used to determine that the aerosol distribution is qualified when the deviation between the aerosol concentration test result of the measuring point and the arithmetic mean value of the test results of each measuring point is less than the set value.

[0105] Specifically, in the upstream area of ​​the filter 21, nine measuring points were selected, each with a rectangular center square hole in three rows and three columns. The deviations between the aerosol concentration test results of the nine measuring points and the arithmetic mean of the test results of each measuring point were all less than 20%, indicating that the aerosol distribution was qualified.

[0106] Through this design, the aerosol diffusion device 17 can achieve uniform distribution and effective diffusion of the aerosol, providing a stable aerosol source for the filter 21, so as to facilitate aerosol concentration detection and filter 21 performance evaluation.

[0107] On the basis of the above-mentioned specific embodiments, it also includes a gas diffusion turbulent plate 16 arranged between the air inlet and the aerosol diffusion device 17. The gas diffusion turbulent plate 16 is parallel to the cross section perpendicular to the axis of the air inlet. The gas diffusion turbulent plate 16 is evenly distributed with air vents, and there is a gap between the edge of the gas diffusion turbulent plate 16 and the inner wall of the shell.

[0108] In practice, the gas diffusion turbulator 16 can improve gas flow characteristics. Its uniformly distributed vents promote even gas distribution, helping to reduce turbulence and eddies during gas flow, thereby improving gas flow uniformity. The gas diffusion turbulator 16 is parallel to a cross-section perpendicular to the inlet axis, helping to form a uniform flow field for gas before entering the aerosol diffusion device 17 and reducing gas flow unevenness. A gap is provided between the edge of the gas diffusion turbulator 16 and the inner wall of the housing to prevent gas from forming dead spots at the edge of the housing, ensuring continuity and uniformity of gas flow.

[0109] By providing the gas diffusion turbulence plate 16 , the high-speed airflow from the air inlet can be evenly spread onto the filter 21 with a larger ventilation area, which helps to improve the filtering efficiency of the filter 21 .

[0110] For example, a rectangular stamped mesh plate 161 is selected as the high-speed impact gas diffusion turbulence plate 16. The bottom of the stamped mesh plate 161 is connected to the bottom surface of the shell through a support bar 162. It has a simple structure and low production cost, but the effect is significant. According to airflow simulation and actual measurement, it is found that when the high-speed columnar airflow hits the punched mesh plate, part of it will be blocked and diverge outward, and part will pass through the dense circular holes in the middle, which can just spread the columnar airflow flat and form a gas turbulent state, thereby better mixing the high-speed gas.

[0111] On the basis of the above-mentioned specific embodiments, an inspection door 5 is installed on the inspection port of the shell, and connecting bolts are provided on the panel 23 on the outer periphery of the inspection port. The right-angled sides of the inspection door 5 are equilaterally chamfered, and a connecting sleeve is provided on the triangular plane 521 of the inspection door 5. The connecting sleeve is mounted on the connecting bolt, and the cylinder of the connecting sleeve is a conical hole 523 with an increasing inner diameter at the end close to the panel 23.

[0112] In one embodiment, the housing is provided with an access opening equipped with an access door 5 to ensure the housing's tightness and integrity during non-maintenance periods. Connecting bolts are provided on a panel 23 around the access opening to connect the access door 5 to the panel 23, ensuring the access door's tightness during normal operation and its easy opening during maintenance.

[0113] The right-angled sides of the access door 5 are equilaterally chamfered. The access door 5 comprises a main body 51, with four right-angled sides connected to fixed foot welds 52. These welds comprise triangular flat surfaces 521, U-shaped reinforcement ribs 522, and conical holes 523. A connecting sleeve is provided on the triangular flat surfaces 521, which fit over connecting bolts. A fastening nut is then attached to the end of the connecting bolts. This design reduces stress concentration and mitigates structural weaknesses caused by localized sharp angles, making the door structure more robust.

[0114] A U-shaped sealing ring is attached to the periphery of the access door 5 to ensure a tight seal between the access door 5 and the housing. The cylindrical end of the connecting sleeve, near the panel 23, has a tapered hole 523 with a gradually increasing inner diameter. This tapered hole 523 serves as a guide, facilitating smooth insertion onto the connecting bolts. To strengthen the triangular surface 521, U-shaped reinforcing ribs 522 are provided on the triangular surface 521. These ribs are located around the periphery of the tapered hole 523, facilitating the connection between the access door 5 and the housing while also reinforcing the connection point between them. This provides greater rigidity, ensuring that even the tightest tightening of the plum blossom nut will not deform the door panel.

[0115] Based on the above specific embodiments, a pressure relief device is provided on the housing, and the pressure relief device includes:

[0116] A pressure sensor for detecting the pressure in the housing;

[0117] A high efficiency filter device 13 is connected to the pressure sensor and the pressure relief port of the housing to control the pressure relief of the bag-in-bag-out filter when it is detected that the pressure difference between the pressure inside the housing and the external pressure is greater than a set value before the inspection door 5 is opened.

[0118] In practice, during in-situ disinfection, the electric zero-leakage valves 1 before and after the bag-in-bag-outlet filter are simultaneously closed. Due to pressure loss in the filter 21, a pressure differential of approximately 500 Pa exists between the bag-in-bag-outlet filter cavity and the outside world. Pressure relief is required for operational safety. Furthermore, to prevent the leakage of harmful microorganisms within the bag-in-bag-outlet filter, a high-efficiency filter device 13 within the pressure relief port filters out these harmful microorganisms.

[0119] For example, a pressure sensor detects the pressure inside the housing, enabling real-time monitoring of system pressure changes. A high-efficiency filter device 13 is connected to the pressure sensor and to the housing's pressure relief port. This device's function is to determine whether pressure relief is necessary based on the pressure sensor's signal before opening the access door 5. If the pressure difference between the housing's internal pressure and the external pressure exceeds a set value, the control system issues a signal to open a valve to release pressure, maintaining system pressure within a safe range and preventing equipment damage or accidents.

[0120] In a preferred embodiment, the design of the pressure differential line 7 for the bag-in / bag-out filter provided by the present invention fully considers the requirements for line sterilization. Pipeline connectors with low ventilation resistance (e.g., a ferrule ball valve instead of a needle stop valve) and a line filter with a large filtration area are selected. This allows the pressure differential line 7 and filter to be sterilized simultaneously while the main filter is being sterilized. This eliminates the need for a dedicated sterilization channel for the pressure differential line 7, thereby improving disinfection efficiency.

[0121] A mechanical differential pressure gauge 6 and an electronic differential pressure gauge 15 are connected in parallel at both ends of the differential pressure line 7. The pressure differential of the differential pressure line 7 can be detected by the mechanical differential pressure gauge 6 and / or the electronic differential pressure gauge 15. The mechanical differential pressure gauge 6 and the electronic differential pressure gauge 15 can be used for detection separately or simultaneously. The electronic differential pressure gauge 15 also has an early warning function. For example, when the instantaneous pressure differential is large, an alarm is issued.

[0122] The in-situ disinfection method includes: the first step is to close the zero leakage valve 1 at both ends of the equipment; the second step is to connect the disinfection pipeline, and the disinfection pipeline is connected to the disinfection inlet 3 and the disinfection outlet 11; the third step is to open the pressure relief valve of the pressure relief port, hold it for one second and then close the pressure relief valve; the fourth step is to close the ferrule ball valve 2 72 and the ferrule ball valve 3 73, and open the ferrule ball valve 1 71; the fifth step is to close the ferrule ball valve 1 71 after the disinfection is completed, and open the ferrule ball valve 2 72 and the ferrule ball valve 3 73.

[0123] In a preferred embodiment, a clamping device 18 for bag-in-bag-out filter is arranged parallel to the opposite side of the shell sealing surface 22, including a U-shaped pressure plate 181 having a pair of long legs and short legs, and a rotating shaft 184 arranged between the long legs and the short legs along the length direction of the U-shaped pressure plate 181. The first end of the rotating shaft 184 extends out of the panel 23 of the shell to connect to a driving mechanism that drives it to rotate. The long legs are farther away from the sealing surface 22 than the short legs, and the long legs and the filter 21 have overlapping projections on the sealing surface 22; it also includes a cam mechanism connected to the rotating shaft 184 for driving the U-shaped pressure plate 181 to move toward the side away from the sealing surface 22, and a clamping mechanism connected to the U-shaped pressure plate 181 for causing the long legs to press the filter 21.

[0124] In the above structure, the bag-in-bag-out filter pressing device 18 is arranged parallel to the housing sealing surface 22, and is used to tightly fit the filter 21 and the housing sealing surface 22, ensuring the seal between the filter 21 and the housing sealing surface 22. The pressing device 18 includes a U-shaped pressing plate 181, a rotating shaft 184, a driving mechanism, a cam mechanism, and a pressing mechanism.

[0125] The U-shaped pressure plate 181 is composed of a pair of long and short legs, with the short legs closer to the sealing surface 22 and the long legs relatively farther away from the sealing surface 22. This design ensures that the opening of the U-shaped pressure plate 181 faces the side closer to the sealing surface 22. Whether the pressing device 18 is located at the bottom or the top, the opening direction of the U-shaped pressure plate 181 is consistent with its location, that is, the opening is upward at the bottom and downward at the top.

[0126] The projections of the long leg and filter 21 on sealing surface 22 overlap, meaning the long leg evenly compresses filter 21, achieving an effective seal. By ensuring good contact between the long leg and sealing surface 22, gas leaks caused by uneven pressure or poor sealing can be avoided, which is crucial for maintaining environmental safety and improving filtration efficiency.

[0127] The rotating shaft 184 is arranged along the length of the U-shaped pressure plate 181, located between the long leg and the short leg, and more preferably located at the center of the two. This arrangement ensures uniform force distribution, thereby providing a balanced force when compressing the filter 21. The first end of the rotating shaft 184 extends beyond the panel 23 of the housing to facilitate connection to an external drive mechanism, such as a motor or a manual handle, to drive its rotation.

[0128] The shaft 184 rotates flexibly between the long and short legs of the U-shaped pressure plate 181, which is achieved by the cooperation of the shaft 184 with the connection holes on the reinforcing plate 189 and the limiting holes on the panel 23. This design allows the shaft 184 to transmit power while also providing the necessary adjustment function.

[0129] The cam mechanism is connected to the rotating shaft 184 via a square shaft. The square hole in the cam mechanism is connected to the square shaft on the rotating shaft 184. The cam mechanism rotates with the rotating shaft 184, while preventing the cam mechanism from rotating circumferentially relative to the rotating shaft 184. This achieves circumferential positioning of the cam mechanism relative to the rotating shaft 184, ensuring that the relative positions of the two are fixed. To further ensure the stability of the cam mechanism, the rotating shaft 184 and the cam mechanism are provided with sockets. A pin is connected to the socket to achieve axial positioning of the cam mechanism relative to the rotating shaft 184, preventing the cam mechanism from moving axially. Through axial and circumferential positioning, the cam mechanism is firmly fixed to the rotating shaft 184, preventing any movement or rotation relative to the rotating shaft 184, ensuring the stability and reliability of the mechanism.

[0130] This application utilizes the rotation of a cam mechanism to control the opening and closing of the U-shaped pressure plate 181, thereby achieving compression and release of the filter 21. Specifically, the cam mechanism has a short side and a long side, which are smoothly connected, allowing the cam's radius to change during rotation. This design allows the cam mechanism to have different contact points with the long leg of the U-shaped pressure plate 181 during rotation, thereby achieving different motion trajectories.

[0131] The rotation radius of the short side is smaller than the distance between the rotating shaft 184 and the long leg, meaning that when this portion of the cam rotates, it does not contact the long leg. Conversely, the rotation radius of the long side is larger than the distance between the rotating shaft 184 and the long leg, allowing the long side to contact the long leg when rotated to a specific position. When the cam rotates to the point where the long side abuts the long leg, it drives the U-shaped pressure plate 181 away from the sealing surface 22. This action causes the long leg to separate from the filter 21, thereby disengaging the clamping device 18 from the filter 21 and allowing the filter 21 to be removed freely.

[0132] The present application utilizes a clamping mechanism to ensure that the long leg of the U-shaped pressure plate 181 can accurately and reliably press the filter 21 toward the sealing surface 22, thereby achieving a tight seal between the filter 21 and the housing. Specifically, the clamping mechanism is connected to the U-shaped pressure plate 181. When the long side of the cam mechanism is not in contact with the long leg, for example, when the long side is parallel to the long leg, the clamping mechanism drives the long leg to press toward the sealing surface 22 until the long leg presses the filter 21, ensuring a tight fit between the filter 21 and the sealing surface 22.

[0133] The clamping device 18 for the bag-in-bag-out filter provided by the present invention provides a reliable, precise and easy-to-operate clamping mechanism to ensure the sealing between the filter 21 and the housing, prevent leakage, and make the clamping and releasing of the filter 21 simple and quick, thereby improving the efficiency of maintaining and replacing the filter 21. The rotation of the rotating shaft 184 drives the rotation of the cam mechanism, and the change of the rotation radius of the cam mechanism is used to control the position of the U-shaped pressure plate 181, thereby realizing the opening and closing action of the U-shaped pressure plate 181, and realizing the clamping and releasing of the filter 21. This mechanism ensures that the clamping device 18 can accurately control the clamping and releasing of the filter 21, thereby improving the efficiency and reliability of the operation. Precise clamping force can be achieved through the clamping mechanism. This precise control helps to prevent over-compression or under-compression of the filter 21, thereby ensuring the sealing and safety of the filter 21.

[0134] On the basis of the above-mentioned specific embodiments, a large through hole is provided on the long foot plate, and a small through hole is provided on the short foot plate. The axes of the large through hole and the small through hole coincide to form a through hole of the U-shaped pressure plate 181. The clamping mechanism includes a bolt 187 mounted in the through hole and a pre-stressed spring 183 mounted on the bolt 187. One end of the bolt 187 is connected to the fixed seat 1810 of the shell, and the other end is provided with a positioning piece 185 on the outside of the long foot plate. The diameters of the pre-stressed spring 183 and the positioning piece 185 are between the large through hole and the small through hole. One end of the pre-stressed spring 183 abuts on the short foot plate, and the other end passes through the large through hole and abuts on the positioning piece 185.

[0135] In one specific embodiment, the clamping mechanism is a carefully designed mechanical structure that ensures a tight seal between the filter 21 and the housing. The clamping mechanism can be spring-loaded to prevent over-clamping. This design provides an appropriate preload while avoiding excessive pressure on the filter 21, thereby protecting the filter 21 from damage. The clamping mechanism can also be limited by a ratchet mechanism, further improving the safety of the filter 21. The ratchet mechanism ensures that the clamping device 18 will not accidentally release during the clamping process, enhancing the reliability of the entire system.

[0136] Exemplarily, the clamping mechanism includes a bolt 187 and a pre-compression spring 183. A large through hole is provided on the long leg of the U-shaped pressure plate 181, and a small through hole is provided on the short leg, and the diameter of the large through hole is larger than the diameter of the small through hole. The axes of the two through holes coincide, forming a through hole of the U-shaped pressure plate 181, that is, forming a continuous channel for passing the bolt 187 of the clamping mechanism. The bolt 187 is sleeved on the through hole, and one end is connected to the fixing seat 1810 of the shell. Specifically, it can be fastened to the fixing seat 1810 by a fixing nut 1811, and the fixing nut 1811 is welded to the box fixing seat 1810. The other end of the bolt 187 is provided with a positioning piece 185 on the outside of the long leg, and the positioning piece 185 can be positioned by a clamping nut 186. Preload spring 183 is mounted on bolt 187, which serves as its guide rod. When U-shaped pressure plate 181 moves freely along bolt 187, preload spring 183 moves along bolt 187. Preload spring 183 has a diameter between the large and small through-holes. One end of preload spring 183 abuts the short leg plate, while the other end extends through the large through-hole and abuts against positioning piece 185. Positioning piece 185 is used to limit the movement of preload spring 183, and the large through-hole allows positioning piece 185 to pass through. Preload spring 183 provides a preload force between positioning piece 185 and the short leg plate.

[0137] Initially, preload spring 183 is compressed, providing the required preload force for U-shaped pressure plate 181. This preload force ensures that U-shaped pressure plate 181 maintains pressure on filter 21. When the long side of the cam contacts the long leg, it drives U-shaped pressure plate 181 along bolt 187, away from sealing surface 22. At this point, the compression of preload spring 183 intensifies. Conversely, when U-shaped pressure plate 181 moves toward sealing surface 22, preload spring 183 helps to smoothly compress filter 21. When filter 21 needs to be compressed, the drive mechanism rotates shaft 184, driving the cam mechanism to rotate and push U-shaped pressure plate 181 to move, causing the long leg to apply pressure to filter 21. The action of preload spring 183 ensures that the filter 21 is quickly replaced while maintaining the seal between filter 21 and the housing, preventing the risk of leakage due to insufficient pressure.

[0138] The clamping force of the clamping mechanism is provided by the elastic force of the compression spring and can be adjusted by adjusting the stroke length of the spring clamping nut 186. To ensure consistent clamping force, the stroke lengths of all spring clamping nuts 186 must be adjusted to be consistent. By ensuring consistent clamping force across all springs, inconsistent clamping force on both sides is avoided, thereby achieving uniform compression of the filter 21.

[0139] Based on the above embodiment, the clamping device 18 uses the pre-load spring 183 to provide a stable pre-load force, and accurately controls the movement of the U-shaped pressure plate 181 through the rotation of the cam mechanism to achieve reliable clamping and rapid replacement of the filter 21 while maintaining the sealing and system reliability.

[0140] On the basis of the above-mentioned specific embodiments, the short foot plate is provided with a positioning sleeve 182 facing the long foot plate at the small through hole, and the pre-stressed spring 183 is sleeved on the positioning sleeve 182. The positioning sleeve 182 provides a stable installation base for the pre-stressed spring 183 and has a guiding effect on the pre-stressed spring 183, ensuring that the pre-stressed spring 183 can expand and contract stably and smoothly.

[0141] Based on the above-mentioned specific embodiments, several groups of reinforcing plates 189 are connected between the long foot plates and the short foot plates. The reinforcing plates 189 are perpendicular to the long foot plates. Connecting holes are provided on the reinforcing plates 189. Limiting holes are provided on the panel 23. The rotating shaft 184 is connected to the connecting holes and the limiting holes.

[0142] In a specific embodiment, the reinforcing plate 189 is sandwiched between the long foot plate and the short foot plate to provide a solid support for the U-shaped pressure plate 181, increase the rigidity and strength of the U-shaped pressure plate 181, and prevent deformation or crushing under high pressure or high load.

[0143] A connecting hole is provided on the reinforcing plate 189, which is used to receive the rotating shaft 184 so that the rotating shaft 184 can pass through the reinforcing plate 189. Preferably, the rotating shaft 184 is normally connected to the connecting hole, and the reinforcing plate 189 provides support for the rotating shaft 184 to ensure the stability of the rotation of the rotating shaft 184.

[0144] A limiting hole is provided on the panel 23, which is aligned with the connecting hole on the reinforcing plate 189 and is used to fix the position of the rotating shaft 184 and limit the movement of the rotating shaft 184, which has only one degree of freedom of rotation, to ensure the precise positioning of the rotating shaft 184, thereby ensuring the reliability and durability of the clamping mechanism.

[0145] In a preferred embodiment, the connecting hole is an elongated hole whose long axis is perpendicular to the long leg plate. The horizontal position of the connecting hole and the rotating shaft 184 is adjustable to adjust the distance that the long leg plate is separated from the filter 21.

[0146] In a specific embodiment, the reinforcing plate 189 is perpendicular to the long foot plate, the connecting hole is a long strip hole, the long axis of the long strip hole is perpendicular to the long foot plate, and the rotating shaft 184 can move along the length direction in the long strip hole, so that the horizontal position of the rotating shaft 184 relative to the long foot plate can be adjusted, thereby changing the pressure point where the long side of the cam mechanism contacts the long foot plate, thereby adjusting the distance that the long foot plate is separated from the filter 21, ensuring that the rotating shaft 184 can provide the necessary adjustment function while transmitting power.

[0147] When the filter 21 is pressed, the long foot is gradually brought closer to the filter 21 by the ability of the pressing mechanism until the required sealing pressure is reached. When the filter 21 needs to be released or replaced, the position of the rotating shaft 184 can be adjusted to gradually separate the long foot from the filter 21, thereby easily removing the filter 21. By precisely controlling the distance between the long foot and the filter 21, the optimal removal clearance of the filter 21 can be ensured, preventing the long foot and the filter 21 from colliding or rubbing during the removal process; at the same time, after the cam end is rubbed, fine-tuning can be performed without disassembling the entire pressing device 18 to compensate for the difference in the position change of the cam end due to wear, thereby ensuring the accurate removal distance between the long foot and the filter 21; the U-shaped pressing plate 181 can adapt to filters 21 of different sizes, and is flexible and reliable to use.

[0148] Based on the above-mentioned specific embodiments, the cam mechanism is an elliptical cam mechanism 188. When the rotating shaft 184 drives the elliptical cam mechanism 188 to rotate until the long side of the cam mechanism abuts against the long foot plate, the U-shaped pressure plate 181 moves the maximum distance to the side away from the sealing surface 22, and the long side end of the elliptical cam mechanism 188 has a plane in contact with the long foot plate.

[0149] In one specific embodiment, the outer contour of the elliptical cam mechanism 188 is composed of an elliptical line and a tangent circle. This design allows for a continuous and smooth change from the minimum outer radius to the maximum outer radius within a 90-degree rotation of the rotating shaft 184. This change allows the stroke of the clamping device 18 to be flexibly adjusted to accommodate different clamping requirements. The elliptical cam mechanism 188 provides a maximum to minimum stroke of the clamping device 18 within a 90-degree range, allowing the clamping function to be achieved through a simple rotation of the rotating shaft 184, ensuring precise position control of the U-shaped pressure plate 181 during the clamping and release processes.

[0150] The rotating shaft 184 is connected to the cam mechanism. When the rotating shaft 184 rotates, it drives the cam mechanism to rotate. During the rotation process of the cam mechanism, its long side gradually abuts the long leg, thereby pushing the U-shaped pressure plate 181 to move. When the long side of the cam mechanism completely abuts the long leg, the U-shaped pressure plate 181 will move to the side away from the sealing surface 22 to the maximum distance. This position is the release position, allowing the filter 21 to be easily inserted or removed. The large distance between the U-shaped pressure plate 181 and the filter 21 improves the convenience of replacing the filter 21.

[0151] The cam mechanism's long end features a flat surface, while the oval cam's tip is ground flat, providing a stable contact point. This design, coupled with spring force, creates a self-locking mechanism, ensuring the cam mechanism maintains its position and pushes the long leg firmly.

[0152] Based on the above embodiment, the elliptical cam mechanism 188, through its unique design and flexible control method, achieves precise control of the U-shaped pressure plate 181, thereby efficiently pressing and releasing the filter 21. This design not only improves the efficiency of filter 21 replacement, but also ensures the sealing and reliability between the filter 21 and the housing.

[0153] Based on the above-mentioned specific embodiments, the second end of the U-shaped pressure plate 181 and the rotating shaft 184 extends to the back plate of the shell, and the rotating shaft 184 is provided with at least two sets of cam mechanisms and two sets of clamping mechanisms to respectively clamp the front and rear of the filter 21.

[0154] In one specific embodiment, a U-shaped pressure plate 181 and a rotating shaft 184 extend through the front panel 23 and the rear panel of the housing. At least one set of cam mechanisms and a clamping mechanism are disposed at the front end of the U-shaped pressure plate 181 and the rotating shaft 184, and one set of cam mechanisms and a clamping mechanism are disposed at the rear end of the U-shaped pressure plate 181 and the rotating shaft 184, respectively clamping the front and rear portions of the filter 21. Using one set of U-shaped pressure plate 181 and the rotating shaft 184 to simultaneously control multiple sets of cam mechanisms and clamping mechanisms achieves synchronized compression and release of the front and rear portions of the filter 21, helping to maintain a tight seal between the filter 21 and the housing, preventing air or liquid leakage, and thereby improving the reliability of the entire filtration system.

[0155] Based on the above embodiment, linkage is achieved through the cam mechanism and the clamping mechanism on the same set of U-shaped pressure plates 181 and the rotating shaft 184, ensuring that the filter 21 is clamped or released at the same time on the same horizontal plane, which helps to maintain the stability and synchronization of the movement of the filter 21; since multiple clamping points can be controlled at the same time, the time and labor intensity required to replace the filter 21 are reduced, the filter 21 can be quickly replaced, and the efficiency of maintenance and operation is improved; since the front and rear clamping mechanisms work at the same time, the pressure on the filter 21 can be more evenly distributed, reducing the risk of poor sealing or damage to the filter 21 due to uneven pressure; using a set of U-shaped pressure plates 181 and the rotating shaft 184 to control multiple sets of cam mechanisms and clamping mechanisms can simplify the structural design, reduce the number of components required, and thus reduce manufacturing costs and maintenance complexity; since the front and rear clamping mechanisms work synchronously, the risk of filter 21 displacement or damage caused by operating each part separately can be reduced, thereby improving the stability of the entire system.

[0156] Based on the above specific embodiments, there are two sets of pressing devices 18 , which respectively press the bottom and the top of the filter 21 .

[0157] In one specific embodiment, there are two sets of clamping devices 18, each responsible for compressing a different part of the filter 21. For example, two sets of clamping devices 18 are responsible for the top and bottom of the filter 21, respectively, allowing these two parts to be compressed independently. By providing independent clamping devices 18 at the top and bottom of the filter 21, the sealing performance of the filter 21 and the reliability of the system are improved. At the same time, it also provides convenient maintenance and operational flexibility, ensuring the stable operation of the filtration system under various operating conditions. Precise sealing pressure control is performed on each part of the filter 21 to meet different sealing requirements. By independently controlling the clamping force at the top and bottom, different sealing requirements can be more accurately met, ensuring the sealing between the entire filter 21 and the housing. Providing clamping devices 18 at the top and bottom of the filter 21 can more evenly distribute the pressure on the filter 21. This uniform pressure distribution helps reduce the risk of poor sealing or damage to the filter 21 caused by uneven pressure. The two sets of clamping devices 18 provide a degree of redundancy. Even if one set fails, the other set can still maintain basic sealing function. This redundant design improves the reliability of the entire filtration system. If one of the compression devices 18 requires maintenance or fails, the other can maintain the seal of the filter 21, allowing maintenance to be performed without affecting the operation of the entire system.

[0158] On the basis of the above-mentioned specific embodiments, the driving mechanism is a motor connected to the first end of the rotating shaft 184 , and the motors of the two sets of pressing devices 18 rotate synchronously.

[0159] In practical applications, the two sets of clamping devices 18 can operate synchronously or independently to meet different working conditions and requirements. For example, the synchronous movement of the two sets of clamping devices 18 can be achieved by a motor connected to the first end of the rotating shaft 184, so that the bottom and top of the filter 21 are compressed or released simultaneously, ensuring the sealing between the entire filter 21 and the housing.

[0160] It should be noted that the motor, as a driving source, provides reliable power transmission and reduces errors caused by manual operation. Furthermore, the motor's stability and durability ensure the long-term and effective operation of the clamping device 18. The motor-driven clamping device 18 can be easily integrated into automated systems, automating the filter 21 replacement and clamping processes, improving efficiency and safety.

[0161] Based on the above-mentioned specific embodiments, the driving mechanism is a handle connected to the first end of the rotating shaft 184. When the cam mechanism is in contact with the long foot plate, the handle is in a non-blocking position of the shell opening; when the cam mechanism is not in contact with the long foot plate, the handle is in a blocking position of the shell opening.

[0162] In one embodiment, the clamping device 18 can be manually actuated, with the U-shaped clamping plate 181 being clamped and released via a handle connected to the first end of the rotating shaft 184. The handle is directly connected to the first end of the rotating shaft 184, and the operator can rotate the handle to control the rotation of the rotating shaft 184, thereby actuating the cam mechanism and the clamping mechanism. This design allows the operator to manually adjust the clamping force as needed, making it suitable for applications requiring frequent manual operation.

[0163] The handle's position is designed for ease of operation. Only when the cam mechanism contacts the long foot plate, the long foot plate is disengaged from the filter 21, and the handle is in a non-blocking position relative to the housing opening, that is, the handle is horizontal and the handle and the housing opening do not overlap, and the clamping device 18 is in a released, filter 21-replacement state, can the filter 21 be pulled out. When the cam mechanism is out of contact with the long foot plate, the long foot plate presses the filter 21, and the handle is in a blocking position relative to the housing opening, that is, the handle is vertical and blocks the housing opening, the handle can just prevent the filter 21 from being pulled out.

[0164] This manually actuated clamping device 18 has a built-in protection against misoperation. The handle's position helps prevent misoperation, ensuring that the filter 21 will not move outward due to misoperation while it is compressed, thus ensuring operational safety. Manually rotating the shaft 184 offers a simple structure, low cost, and independence from external power sources, making maintenance relatively simple.

[0165] Based on the above embodiments, a fitting judgment mechanism is further included to judge whether the filter 21 fits the sealing surface 22. The fitting judgment mechanism includes:

[0166] A plurality of distance sensors provided at each corner of the sealing surface 22 for detecting the distance between the sealing surface 22 and the filter 21;

[0167] A first fitting control unit connected to the distance sensors is used to control the driving mechanism to stop running when all the distance sensors detect that the distance between the sealing surface 22 and the filter 21 is zero.

[0168] In practice, the fit determination mechanism is an automated detection system used to ensure proper fit between the filter 21 and the sealing surface 22. This system includes multiple distance sensors and a first fit control unit. The distance sensors are located at each corner of the sealing surface 22 to detect the distance between the sealing surface 22 and the filter 21. These sensors enable the system to determine whether the filter 21 is properly placed on the sealing surface 22.

[0169] The first fitting control unit is connected to all distance sensors, receives signals from the sensors, and determines whether the filter 21 is fully fitted to the sealing surface 22. When all distance sensors detect that the distance between the sealing surface 22 and the filter 21 is zero, the filter 21 is determined to be fully fitted, and the first fitting control unit controls the drive mechanism to stop operation.

[0170] Based on the above embodiment, the fit judgment mechanism can automatically detect whether the filter 21 has been correctly installed, reducing the need for manual inspection and improving the safety and reliability of the system.

[0171] Based on the above specific embodiments, the fitting judgment mechanism further includes:

[0172] A pressure sensor installed on each corner contact surface of the sealing surface 22 and the filter 21 to detect the pressure between the sealing surface 22 and the filter 21;

[0173] A second fitting control unit connected to the pressure sensors is used to control the driving mechanism to stop running when all the pressure sensors detect that the pressures between the sealing surface 22 and the filter 21 are equal.

[0174] In actual application, the fit judgment mechanism is to ensure that the filter 21 and the sealing surface 22 fit correctly and maintain the required pressure throughout the operation. The fit judgment mechanism includes a pressure sensor and a second fit control unit. The pressure sensor is also installed on each corner contact surface between the sealing surface 22 and the filter 21 to detect the pressure between the sealing surface 22 and the filter 21. These sensors ensure that after the filter 21 is fitted, the pressure on the entire sealing surface 22 is evenly distributed. The second fit control unit is connected to the pressure sensor and monitors the data of all pressure sensors. When all pressure sensors detect that the pressure between the sealing surface 22 and the filter 21 is equal, it means that the pressure has been evenly distributed, and the control unit will control the drive mechanism to stop running to ensure that it is not over-pressurized, thereby avoiding possible damage or leakage.

[0175] Based on the above embodiment, the fit determination mechanism can ensure the correct installation and sealing of the filter 21. By monitoring the distance and pressure in real time, the safety and reliability of the filtration system are improved, while the need for manual inspection is reduced. The tightness of the filter 21 during the compression process is ensured, preventing leakage or other problems caused by improper installation.

[0176] In a preferred embodiment, the positioning and pulling-out device 19 for the bag-in and bag-out filter includes a support seat 191 installed on the bottom surface of the shell, and a guide rail is provided in the inner groove of the support seat 191. The guide rail is perpendicular to the panel 23 of the shell, and the panel 23 is provided with a through hole aligned with the guide rail; it also includes a pull-out rod 192 connected to the guide rail and sleeved in the through hole, the inner end of the pull-out rod 192 has a baffle perpendicular to the guide rail, and the outer end has a handle, the handle is located on the outside of the panel 23, and the support seat 191 is provided with an avoidance groove adapted to the baffle. When in use, the filter 21 is placed on the support seat 191, and the back of the filter 21 rests on the baffle. The pull-out rod 192 moves along the guide rail and the through hole to pull the filter 21 out or send it into the shell.

[0177] In the above structure, the positioning and pulling device 19 for the bag-in and bag-out filter is a device for safely replacing the filter 21. It is used in situations where high safety is required, such as biosafety laboratories, hospital isolation areas, industrial chemical gas emissions and other environments. It can prevent the leakage of pollutants inside the filter 21, thereby protecting the safety of operators and the environment.

[0178] The positioning and pulling device 19 includes a support base 191, a guide rail, a pull-out rod 192, a baffle, and a handle. The filter 21 is mounted within the housing, with the support base 191 mounted on the bottom surface of the housing to support the filter 21. The inner side of the support base 191 has a groove. Preferably, the support base 191 is concave. The guide rail is positioned within the inner groove of the support base 191, perpendicular to the housing panel 23, i.e., along the direction in which the filter 21 is pulled out. A through hole is provided in the panel 23, aligned with the guide rail. The pull-out rod 192 passes through the through hole and enters the guide rail. The pull-out rod 192 moves along the through hole and the guide rail to pull out or insert the filter 21. A baffle is provided at the inner end of the pull-out rod 192, perpendicular to the guide rail, to determine the initial position of the filter 21 on the support base 191. The handle is provided at the outer end of the pull-out rod 192, located outside the panel 23, to facilitate pulling by the operator. The avoidance groove is provided on the support seat 191 and is adapted to the baffle to provide an avoidance space for the baffle when the pull-out rod 192 moves.

[0179] During use, the filter 21 is placed on the support seat 191, with the back of the filter 21 resting against the baffle. By pulling the handle, the pull-out rod 192 moves along the guide rail and through-hole, thereby pulling the filter 21 out of or into the housing. Specifically, when inserting the filter 21 into the housing, the filter 21 is placed on the support seat 191, pushed so that the back of the filter 21 rests against the baffle, and the filter 21 is further pushed, and the filter 21 is inserted into the housing together with the positioning and pulling device 19. When pulling out the filter 21, the handle is pulled outward from the outside of the panel 23, and the pull-out rod 192 and the baffle are pulled out together, while the baffle pushes the filter 21 out.

[0180] By applying the positioning and pulling-out device 19 provided in the embodiment of the present invention, when replacing the filter 21, people do not need to reach into the equipment on which the filter 21 is installed. The filter 21 can be pulled out by pulling the handle from the outside, thereby realizing quick replacement of the filter 21; at the same time, the side wall of the filter 21 can be made to fit more closely with the opening of the shell, thereby ensuring the safety and sealing of the operation process; by pulling the filter 21, which is larger in volume and weight, in the forward direction through the positioning and pulling-out device 19, it is easy to apply force, and the operation is convenient and more labor-saving.

[0181] On the basis of the above-mentioned specific embodiments, a limiting mechanism is further included for determining whether the filter 21 is in the correct position. The limiting mechanism includes:

[0182] The limit block installed on the handle,

[0183] A sensing block mounted on the panel 23 and cooperating with the limit block;

[0184] A first in-position limiting component is connected to the sensing block and is used for sending an in-position signal when the limiting block contacts the sensing block.

[0185] In actual application, in order to ensure that the filter 21 can be accurately delivered to the specified position, a limiting mechanism is provided in the positioning and pulling-out device 19. The limiting mechanism may include a limiting block, a sensing block and a first in-place limiting component. The limiting block is mounted on the handle, the sensing block is mounted on the panel 23, and the sensing block cooperates with the limiting block. The limiting block and the sensing block are equivalent to limit switches. When the filter 21 is delivered into the housing and the limiting block contacts the sensing block, a signal is triggered, indicating that the filter 21 has reached the correct position, thereby confirming that the filter 21 has reached the correct position. The first in-place limiting component is connected to the sensing block. When the limiting block contacts the sensing block, the first in-place limiting component will send an in-place signal to prompt the operator that the filter 21 has been correctly placed.

[0186] The design of this limiting mechanism can improve the accuracy and safety of replacing the filter 21, ensure that the filter 21 will not be displaced during the replacement process, and ensure the correct installation and sealing of the filter 21, thereby avoiding possible risks of contamination and leakage.

[0187] Based on the above-mentioned specific embodiments, the handle is a C-shaped handle, the middle part of the C-shaped handle is connected to the pull-out rod 192, the abutting parts at both ends face the panel 23, the abutting parts at both ends are parallel and equal in length, the limit blocks are the abutting parts at both ends, and the first in-position limit component is used to send a correct in-position signal when the limit blocks at both ends are in contact with the sensing block.

[0188] In actual application, the C-shaped handle is used as the operating part, the middle part of which is connected to the pull-out rod 192, and the abutting parts at both ends face the panel 23. The abutting parts at both ends are parallel and equal in length. This design makes the operation more stable and convenient for the palm to hold when pulling out.

[0189] The limit blocks serve as detection components and are the abutment portions at both ends of the C-shaped handle, used to detect the position of the baffle within the housing. There are two limit blocks, namely the abutment portions at both ends of the C-shaped handle. Of course, the number of limit blocks can also be multiple. When two or more limit blocks are in contact with the sensing block, it indicates that the C-shaped handle is accurately positioned, the filter 21 is straight, and the orientation is correct, that is, the filter 21 is not offset or tilted. The correct position signal emitted by the first in-place limit component can notify the operator that the filter 21 has been correctly placed and the next operation in the automatic control system can be carried out.

[0190] In addition, when the filter 21 is pushed into the device, after the flat heads of the abutting parts at both ends of the C-shaped handle come into contact with the panel 23, the filter 21 can no longer be pushed forward because the abutting parts press against the panel 23, thereby realizing the positioning function of the filter 21 and preventing the filter 21 from being installed in the wrong position.

[0191] Based on the above specific embodiments, the limiting mechanism further includes:

[0192] a position sensor for detecting the position of the baffle in the housing;

[0193] A second in-position limiting component is connected to the position sensor and is used to send an in-position signal when the detection baffle reaches a set position in the housing.

[0194] In actual application, in the positioning and pulling device 19, the design of the limiting mechanism adds position detection and in-position signal functions to ensure accurate positioning of the filter 21 and convenient operation.

[0195] The working principle of this limiting mechanism is that the sensing block is installed on the panel 23 and cooperates with the limiting block. When the limiting block contacts the sensing block, it can be confirmed that the baffle has reached the set position in the shell. The first in-place limiting component is connected to the sensing block. When the limiting block contacts the sensing block, an in-place signal is sent. The first in-place limiting component prompts the operator that the filter 21 has reached the correct position. The position sensor is used to detect the position of the baffle in the shell to ensure that the baffle is correctly positioned. The second in-place limiting component is connected to the position sensor. When it detects that the baffle has reached the set position in the shell, it sends an in-place signal, providing double protection to ensure the accurate positioning of the filter 21.

[0196] Based on the above-mentioned limiting mechanism, through the contact between the limiting block and the sensing block, and the cooperation between the position sensor and the second in-position limiting component, dual detection of the position of the filter 21 is achieved, further realizing precise control of the position of the filter 21 and improving the safety and accuracy of the operation.

[0197] On the basis of the above-mentioned specific embodiments, a positioning component for detecting parallel contact between the filter 21 and the baffle is further included. The positioning component includes:

[0198] Three contact sensors are provided on the side of the baffle facing the panel 23, wherein the three contact sensors are not collinear;

[0199] A positioning unit connected to the contact sensor is used to send a positioning accurate signal when the filter 21 is in contact with the contact sensor.

[0200] In actual application, the newly added positioning component in the positioning and pulling device 19 is to ensure that the filter 21 and the baffle can be in parallel and accurately contact. The positioning component includes a contact sensor and a positioning unit.

[0201] Three contact sensors are located on the side of the baffle facing panel 23. These sensors are non-collinear, meaning they are not spatially aligned. This allows detection of contact between filter 21 and the baffle from different angles, ensuring accurate positioning of filter 21 in all directions and enhancing safety and reliability. Contact sensors can be mechanical, such as micro switches, or electronic, such as capacitive or inductive sensors. They can detect even minute changes in distance, ensuring precise contact between filter 21 and the baffle.

[0202] The positioning unit is connected to the contact sensors. When the filter 21 contacts all the contact sensors, the positioning unit will send an accurate positioning signal to inform the operator that the filter 21 has been correctly aligned, or for the next operation in the automatic control system.

[0203] In the above embodiment, when filter 21 is correctly placed on the baffle, the contact sensor is triggered, and the positioning unit subsequently sends a signal indicating that filter 21 has been accurately positioned on the baffle. The use of multiple contact sensors improves positioning accuracy and reliability, enhancing the automation and operational convenience of positioning and removal device 19. This precise positioning ensures that filter 21 does not shift during replacement, thereby reducing the risk of contamination.

[0204] Based on the above-mentioned specific embodiments, the baffle is a T-shaped plate, the lower end of the vertical plate of which is connected to the inner end of the pull-out rod 192, and the upper end is connected to the horizontal plate. The vertical plate is along the vertical direction, and the width of the avoidance groove is equal to the width of the vertical plate. The contact sensors are respectively located at the lower part of the vertical plate and the two ends of the horizontal plate.

[0205] In actual application, in the positioning and pulling device 19 , the baffle is designed as a T-shaped plate. This design helps to provide stable support and precise positioning for the filter 21 when the pulling rod 192 moves.

[0206] The T-shaped baffle includes a vertical plate and a horizontal plate. The vertical plate portion is installed along the vertical direction, with its lower end connected to the inner end of the pull-out rod 192 and the upper end connected to the horizontal plate. Such a structure allows the baffle to move with the pull-out rod 192, while providing vertical support for the filter 21. The horizontal plate portion is connected to the upper end of the vertical plate, providing horizontal support for the filter 21, ensuring that the filter 21 is stable in the horizontal direction. The T-shaped baffle increases the contact area between the device and the back of the filter 21, ensuring that the filter 21 is pulled out in a straight line when pulled out, preventing the filter 21 from deviating when pulled out, thereby preventing the filter 21 from deviating, resulting in an increase in the contact force between the filter 21 sealant and the sealing surface 22, and increasing additional moving pulling force.

[0207] The width of the avoidance groove on the support seat 191 is equal to the width of the vertical plate, so that the vertical plate can move freely in the avoidance groove without additional friction or resistance, ensuring smooth operation of the pull-out rod 192.

[0208] A contact sensor located at the bottom of the vertical plate detects whether filter 21 is in contact with the vertical plate portion of the baffle. When filter 21 is introduced, this sensor first contacts filter 21, signaling the start of filter 21's movement. Contact sensors at each end of the horizontal plate detect whether the edge of filter 21 is in parallel contact with the horizontal plate portion of the baffle. When both sensors are triggered, filter 21 is fully aligned and in parallel contact with the baffle.

[0209] The above embodiment ensures that the filter 21 precisely mates with the baffle in three dimensions during the process of being pulled out of or inserted into the housing. The contact sensor signal confirms the position of the filter 21, while the T-shaped baffle structure provides the necessary mechanical support, ensuring operational stability and safety. Thus, the positioning and extraction device 19 enables quick, accurate, and safe replacement of the filter 21.

[0210] On the basis of the above-mentioned specific embodiments, the pull-out rod 192 is provided with at least two sliding blocks that cooperate with the guide rail.

[0211] In actual application, the pull-out rod 192 is provided with at least two sliders, which cooperate with the guide rail and can be two, three or more. The specific number depends on the length of the pull-out rod 192 and the required stability. Multiple sliders can provide better support and stability, reducing the shaking of the pull-out rod 192 during movement. The slider can be designed to fit the shape of the guide rail tightly to ensure smooth sliding. The slider can be made of plastic, metal or other wear-resistant materials to reduce friction and wear. The shape and size of the guide rail need to match the slider to ensure that the slider can move freely in the guide rail without getting stuck. The guide rail can be straight or curved, depending on the design of the device and the moving path of the filter 21. The design and position of the slider can affect the positioning accuracy of the pull-out rod 192. By precisely controlling the position and movement of the slider, precise positioning of the pull-out rod 192 can be achieved.

[0212] In the above embodiment, the pull-out rod 192 is connected to the guide rail through a plurality of sliders, which can disperse the weight of the pull-out rod 192 and reduce the pressure borne by a single slider, thereby improving the smoothness of movement; the wear of the pull-out rod 192 and the guide rail can be reduced because they can share the friction generated when the pull-out rod 192 moves, ensuring the precise positioning and smooth movement of the filter 21 when it is put into or pulled out of the shell, thereby improving the safety and efficiency of the operation.

[0213] Preferably, the slider and the pull-out rod 192 are detachably connected to facilitate quick replacement when worn or damaged, easy replacement and maintenance, and reduced equipment downtime.

[0214] Based on the aforementioned specific embodiments, a linear bearing is provided within the through-hole of panel 23. Depending on the application requirements, different types of linear bearings can be selected, such as plastic or metal. Pullout rod 192 is slidably connected to the linear bearing, allowing pullout rod 192 to move smoothly within the linear bearing. This connection allows pullout rod 192 to slide freely within the linear bearing, allowing it to move precisely along a straight path, reducing friction and wear, improving the smoothness and precision of movement, and achieving smooth linear motion.

[0215] Based on the above-mentioned specific embodiments, the front of the pull-out rod 192 is connected to a limit plate parallel to the baffle, the vertical distance between the baffle and the limit plate is equal to the thickness of the filter 21, and the support seat 191 is provided with an avoidance opening that cooperates with the limit plate.

[0216] In practice, the stopper plate connected to the front of the pull-out rod 192 is parallel to the baffle, ensuring that the edge of the filter 21 is properly aligned with the baffle when it is installed into the housing. The vertical distance between the baffle and the stopper plate is set to be equal to the thickness of the filter 21, ensuring that the filter 21 is correctly placed on the baffle during installation and achieves precise positioning.

[0217] The support seat 191 is provided with an avoidance opening that cooperates with the limit plate. When the pull-out rod 192 is pulled out or pushed in, the limit plate can pass through the avoidance opening smoothly, allowing the limit plate to pass smoothly during the movement of the pull-out rod 192, avoiding interference with the support seat 191, and ensuring smooth operation and smooth movement of the filter 21.

[0218] When the filter 21 is installed in the housing, the limit plate is flush with the support seat 191, or lower than the support seat 191, or the limit plate is not connected to the pull-out rod 192, ensuring that the back of the filter 21 rests smoothly on the baffle. When the back of the filter 21 rests on the baffle, the limit plate is perpendicular to the support plate, that is, parallel to the baffle. At this time, the distance between the limit plate and the baffle ensures the correct placement of the filter 21, ensures the positioning accuracy of the filter 21 during the pulling and loading process, and reduces the risk of damage to the filter 21 or poor sealing due to inaccurate positioning. When the filter 21 needs to be pulled out, the pull-out rod 192 can smoothly pass through the avoidance port and pull out the filter 21 together with the limit plate, avoiding the displacement or tilt of the filter 21 during the removal process. When the filter 21 is pulled out of the panel 23 and is lifted down from the installation port, similar to when the filter 21 is installed into the shell, the limit plate is flush with the support seat 191, or lower than the support seat 191, or the limit plate is not connected to the pull-out rod 192, so that the filter 21 can be moved out of the support seat 191.

[0219] In the above embodiment, when the positioning and pulling device 19 pulls the filter 21, the front and back of the filter 21 are positioned on both sides by the baffle and the limit plate to prevent the filter 21 from rotating, tilting, or shifting, thereby ensuring the precise positioning of the filter 21 during the loading and unloading process, thereby improving the operational convenience, speed, accuracy, and safety of the entire device.

[0220] On the basis of the above-mentioned specific embodiments, the limiting plate is rotatably connected to the pulling rod 192 so that the limiting plate is flush with or perpendicular to the supporting seat 191 .

[0221] In actual application, in order to achieve different connection states of the limit plate, the limit plate and the pull-out rod 192 are set to be rotatably connected. That is, when the filter 21 is placed on the support seat 191 or removed from the support seat 191, the limit plate can be adjusted to a position flush with the support seat 191 through the rotational connection, providing more space for the filter 21 and the operator. When pulling the filter 21 into or out of the housing, the limit plate can be adjusted to a position perpendicular to the support seat 191, providing additional support and positioning for the filter 21, ensuring the precise positioning of the filter 21 during the installation and removal process.

[0222] Of course, the rotational connection between the limit plate and the pull-out rod 192 is only a preferred embodiment, not the only one. The limit plate and the pull-out rod 192 can also be detachably connected or lifted and lowered, so that the position of the limit plate can be easily adjusted as needed, providing precise positioning during operation to ensure the smooth installation of the filter 21.

[0223] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0224] The above is a detailed introduction to the bag-in, bag-out filter provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core ideas of the present invention. It should be pointed out that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bag-in-bag-out filter, characterized in that: The invention comprises a shell provided with an air inlet and an air outlet in the width direction, a filter installed in the shell and located between the air inlet and the air outlet, an aerosol diffusion device (17) installed between the air inlet and the filter inlet for injecting aerosol into the shell, a downstream gas sampling device and a bacterial sheet placement device (10) installed between the filter outlet and the air outlet, wherein the downstream gas sampling device is used to collect gas filtered by the filter, and the bacterial sheet placement device (10) comprises a single-head sealed tube (101) whose open end is inserted into the connecting hole of the shell and is sealed with the connecting hole, and a multi-section mesh tube (103) connected to the open end of the single-head sealed tube (101) and having mesh holes on the tube wall, wherein the head and tail of the mesh tube (103) are detachably connected in sequence, and bacterial sheets are placed in the mesh tube (103).

2. The bag-in-bag-out filter according to claim 1, characterized in that: The mesh tube (103) is provided with a partition (102) perpendicular to its axis, the end of the last mesh tube (103) is connected to a plug (106), the head and tail of the mesh tube (103) are directly connected via an internal thread (105), and the single-head sealing tube (101) and the connecting hole are connected via a perforated chuck (104).

3. The bag-in-bag-out filter according to claim 1, characterized in that: The housing is provided with an upstream gas sampling port (2) between the aerosol diffusion device (17) and the filter inlet; and further comprises a gas failure detection mechanism for judging that the injected aerosol is unqualified when the concentration of the aerosol collected from the upstream gas sampling port (2) is less than a set threshold value.

4. The bag-in-bag-out filter according to claim 3, characterized in that: The downstream gas sampling device comprises a scanning leak detection device (20) located at the front end of the bacterial sheet placement device (10) and a total filtration efficiency detection port (12) located at the rear end of the bacterial sheet placement device (10); and also comprises an installation detection mechanism for judging that the filter is incorrectly installed when the difference between the aerosol concentration collected from the scanning leak detection device (20) and the aerosol concentration collected from the total filtration efficiency detection port (12) is greater than a set value.

5. The bag-in-bag-out filter according to claim 4, characterized in that: The scanning leak detection device (20) comprises a scanning tube (202) arranged vertically and having a vertical slot, a driving mechanism for driving the scanning tube (202) to move in the depth direction of the shell, and a glue outlet pipe connected to the scanning tube (202), wherein an aerosol outlet (9) of the glue outlet pipe is connected to the aerosol concentration detection device outside the shell, and the vertical slot faces and is closely attached to the central window of the filter.

6. The bag-in-bag-out filter according to claim 5, characterized in that: The installation detection mechanism includes: a concentration detection unit for dynamically detecting the aerosol concentration corresponding to the real-time position of the scanning tube (202) during its movement; A position sensor for detecting the real-time position of the scanning tube (202); a data acquisition unit connected to the aerosol concentration and position sensors and used to acquire the corresponding relationship between the real-time position and real-time concentration of the scanning tube (202); A position detection unit is used to find out the aerosol collection position information corresponding to when the aerosol concentration is greater than a set value according to the data collection unit.

7. The bag-in-bag-out filter according to claim 1, characterized in that: The aerosol diffusion device (17) comprises an aerosol main injection tube connected to the aerosol injection port (4) on the shell, a multi-section aerosol diversion tube with one end connected to the outlet of the aerosol main injection tube, and a terminal injection tube connected to the other end of the aerosol diversion tube. The aerosol diversion tube and the terminal injection tube are on a vertical plane parallel to the air inlet surface of the filter, and the multi-section aerosol diversion tubes are spaced at a set angle.

8. The bag-in-bag-out filter according to claim 7, characterized in that: It also includes a gas diffusion turbulent plate (16) arranged between the air inlet and the aerosol diffusion device (17), the gas diffusion turbulent plate (16) is parallel to the cross section perpendicular to the axis of the air inlet, the gas diffusion turbulent plate (16) is evenly distributed with air holes, there is a gap between the edge of the gas diffusion turbulent plate (16) and the inner wall of the shell, the end injection tube and the aerosol diversion tube are both provided with air holes, and the area surrounded by the end injection tube covers the entire air inlet surface of the filter.

9. The bag-in-bag-out filter according to any one of claims 1 to 8, characterized in that: An inspection door (5) is installed on the inspection port of the shell, and a connecting bolt is provided on the panel (23) on the outer periphery of the inspection port. The right-angled side of the inspection door (5) adopts an equilateral chamfered type. A connecting sleeve is provided on the triangular plane (521) of the inspection door (5), and the connecting sleeve is sleeved on the connecting bolt. The cylinder of the connecting sleeve is a conical hole (523) with an increasing inner diameter at one end close to the panel (23).

10. The bag-in-bag-out filter according to claim 9, characterized in that: The housing is provided with a pressure relief device, which includes: a pressure sensor for detecting the pressure in the housing; A high-efficiency filter device (13) is connected to the pressure sensor and to the pressure relief port of the housing, and is used to control the pressure relief of the bag-in-bag-out filter when it is detected that the pressure difference between the pressure inside the housing and the external pressure is greater than a set value before the inspection door (5) is opened.

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