Bag-in-bag-out filtration device

Abstract

The application relates to a bag-in-bag-out filtering device, which relates to the technical field of biological safety and comprises the following: a ventilation duct is arranged in a box body; an air inlet and an air outlet are arranged on the box body and communicate with the ventilation duct; one or more filters are movably arranged in the ventilation duct; an opening is arranged on the box body and communicates with the ventilation duct; a sealing door is detachably arranged on the opening; a detection piece is arranged on one side of the box body close to the sealing door; and a frame body is arranged in the box body and abuts against the filter; the box body comprises a main body, an air inlet shell, an air outlet shell and a cover plate, and the ventilation duct is formed between the main body and the cover plate; the frame body and the main body are integrally bent and formed, one end of the frame body is embedded in the main body, and the other end of the frame body is bent and connected with the end of the main body. Compared with a traditional filtering box, the filtering device is integrally formed, welding leakage is avoided, the filtering device is not easy to deform, good sealing performance and pressure bearing strength are maintained, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of biosafety technology, specifically to a bag-in-bag-out filtration device. Background Technology

[0002] In fields such as industrial dust control and hazardous material handling, bag-in-bag-out filtration devices are widely used due to their strong sealing and safe operation. These devices achieve safe filtration and transfer of materials through a sealed bag system, effectively preventing operators from coming into contact with harmful substances.

[0003] In existing technologies, the housing of bag-in-bag-out filter devices and the filter support frame inside the housing are generally connected by welding, and are all made of relatively thick plates. Welding is not only complex and time-consuming, but also poses a risk of stress concentration at the welded areas, affecting the overall structural stability. After long-term use, it can lead to systemic risks due to weld deformation and bolt corrosion. While thicker plates ensure the device's pressure resistance, sealing, and strength, they significantly increase material costs and also greatly increase the device's weight, resulting in significantly higher transportation and installation costs. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a bag-in-bag-out filtration device. This device is integrally molded, has the advantages of being resistant to deformation, maintaining good sealing and pressure resistance, and reducing costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a bag-in-bag-out filtration device, comprising:

[0006] The enclosure has a ventilation duct inside, and the enclosure is provided with an air inlet and an air outlet communicating with the ventilation duct. One or more filters are movably installed inside the ventilation duct, and the enclosure is also provided with one or more openings communicating with the ventilation duct.

[0007] A sealed door, having one or more of them, detachably mounted on the opening;

[0008] The detection component is assembled on the side of the housing near the sealing door, with one end communicating with the housing; and

[0009] The frame is assembled inside the housing and abuts against the filter;

[0010] The enclosure includes: a main body, an air inlet shell connected to one end of the main body, an air outlet shell connected to the other end of the main body, and a cover plate connected to the side of the main body facing away from the sealing door, wherein the ventilation channel is formed between the main body and the cover plate;

[0011] Both the frame and the main body are integrally bent and formed. One end of the frame is embedded in the main body, and the other end is bent and connected to the end of the main body.

[0012] The present invention further provides that the thickness of both the frame and the main body is 1.5mm-5.0mm.

[0013] The present invention further provides that the thickness of both the frame and the main body is 1.5mm-2.5mm.

[0014] The present invention further provides that the thickness of both the frame and the main body is 2.0 mm.

[0015] The present invention further includes the following: the detection component includes: a mounting box, and one or more differential pressure gauges disposed in the mounting box and with one end connected to the housing.

[0016] The present invention further includes, wherein the mounting box comprises: a box body having an internal cavity for accommodating the differential pressure gauge, and a box cover detachably mounted on the box body.

[0017] The present invention further includes, wherein the sealing door comprises: a bag ring disposed around the opening, a door body detachably mounted on the bag ring, a handle disposed on the door body, and a clamping member disposed on the main body for locking the door body.

[0018] The present invention is further provided with a first disinfection port on the air inlet shell and a second disinfection port on the air outlet shell.

[0019] The present invention further includes, in addition to, a detection and scanning mechanism disposed within the housing near the air outlet.

[0020] The present invention further includes, in this invention, a base support disposed at the bottom of the housing.

[0021] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0022] 1. In this utility model, the main body and the frame are integrally bent and formed, eliminating the traditional method of fully welding the frame into the main body, reducing splicing and welding gaps, and preventing airflow leakage from non-filtration paths. At the same time, the frame is embedded in the main body, which enhances the pressure resistance of the filtration device and plays a supporting role in the edge of the main body, preventing dents or deformation.

[0023] 2. In this utility model, both the frame and the main body are made of 2.0mm thick sheet metal bent into shape. Compared with the traditional method of welding thicker sheet metal, this filter device not only reduces material and transportation and installation costs, but also achieves the same pressure resistance and sealing performance as thicker sheet metal by bending thinner sheet metal. It can work continuously even under high pressure without structural deformation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 Exploded view of the bag-in-bag-out filter device;

[0026] Figure 2 This is a structural diagram of the box and frame;

[0027] Figure 3 This is an exploded view of the main body and the frame structure.

[0028] Explanation of reference numerals in the attached drawings: 100, housing; 110, ventilation duct; 120, air inlet; 130, air outlet; 140, opening; 150, main body; 160, air inlet shell; 161, first disinfection port; 170, air outlet shell; 171, second disinfection port; 180, cover plate; 200, sealing door; 210, bag loop; 220, door body; 230, handle; 240, clamping component; 300, detection component; 310, mounting box; 311, box body; 312, box cover; 320, differential pressure gauge; 400, frame; 500, detection scanning mechanism; 600, base bracket. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0031] This embodiment relates to a bag-in-bag-out filtration device, referring to... Figures 1-2 It includes: box body 100, sealing door 200, testing component 300 and frame 400.

[0032] The housing 100 has a hollow ventilation duct 110, and the housing 100 is equipped with an air inlet 120 and an air outlet 130 respectively connected to the ventilation duct 110, optimizing airflow direction, reducing airflow resistance, and improving filtration efficiency. Two filters are movably installed in the ventilation duct 110: a pre-filter near the air inlet 120 and a high-efficiency filter near the air outlet 130, meeting high cleanliness requirements. In other embodiments, a medium-efficiency filter or multiple filters may also be installed in the ventilation duct 110 to accommodate different pollutant concentrations or filtration precision requirements. The housing 100 is also provided with openings 140 for replacing the pre-filter and the high-efficiency filter. Two sealing doors 200 are provided and detachably mounted on the opening 140. The two sealing doors 200 respectively seal the two filters, ensuring the airtightness of the device during operation and preventing the leakage of unfiltered pollutant gas. When replacing the filters, the sealing doors 200 are combined with bag-in / bag-out operations to further isolate pollutants and ensure operator safety. The filters in the ventilation duct 110 are movable and, in conjunction with the detachable sealing doors 200, allow for filter replacement via a bag-in / bag-out method, i.e., removing and installing the filters by wrapping them in a sealed bag, avoiding direct contact with pollutants and improving safety. The detection element 300 is fixedly installed on the side of the housing 100 near the sealing doors 200, specifically between the two sealing doors 200, with one end connected to the housing 100, to monitor the air pressure difference in real time. The frame 400 is embedded inside the housing 100 and tightly abuts against the filter, ensuring uniform airflow through the filter material and preventing bypass leakage.

[0033] Furthermore, the housing 100 includes: a main body 150, an inlet shell 160, an outlet shell 170, and a cover plate 180. The inlet shell 160 and outlet shell 170 are respectively connected to both ends of the main body 150. The cover plate 180 is fully welded to the side of the main body 150 facing away from the sealing door 200. The inlet shell 160 and outlet shell 170 are respectively sealed to the main body 150 and the cover plate 180 via flanges, eliminating seams and preventing gas leakage. Both the frame 400 and the main body 150 are integrally bent, reducing gaps in traditional splicing structures, preventing airflow leakage from non-filtration paths, and enhancing the pressure resistance of the device. One end of the frame 400 is embedded in the main body 150, and its other end is bent and fully welded to the bent end of the main body 150. One side of the frame 400 is tightly abutted against the filter, preventing airflow from bypassing the filter edge, ensuring all airflow passes through the filter material, improving filtration accuracy and sealing. Specifically, the main body 150 is integrally bent into an inverted U-shape and fully welded to the cover plate 180 to form a hollow rectangular ventilation duct 110. In other embodiments, the main body 150 may also be integrally bent into other shapes.

[0034] In this embodiment, both the frame 400 and the main body 150 are 2.0mm thick, formed by integral bending of a thinner sheet metal. Compared to traditional filter boxes made of thicker sheet metal, which often require splicing multiple sheets and have numerous weld seams that can easily lead to leakage, this embodiment not only reduces material and transportation / installation costs, but also achieves the same pressure resistance and sealing performance as those made of thicker sheet metal due to the integral bending process, even with thinner sheet metal. It can continue to operate under high pressure without structural deformation. In other embodiments, the thickness of the frame 400 and the main body 150 can also be 1.5mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., as long as the thickness of the frame 400 and the main body 150 is between 1.5mm and 5.0mm, and there is no need to limit it here. Specifically, in this embodiment, the main body 150 is made of a 2.0mm thick sheet metal, bent in one piece, while the cover plate 180 is made of a 3.0mm or 5.0mm thick sheet metal. Both are fully welded together using sheets of different thicknesses to reduce costs, maintain good load-bearing strength, and prevent inward collapse or deformation. This avoids the situation where both the main body 150 and the cover plate 180 are made of thinner sheets, which would compromise their load-bearing strength. Furthermore, the main body 150 only needs to be fully welded to the cover plate 180, reducing joint gaps and improving sealing performance in conjunction with sealing strips.

[0035] In this embodiment, refer to Figure 1 The detection component 300 includes a mounting box 310 and a differential pressure gauge 320. The mounting box includes a box body 311 and a box cover 312. The box body 311 has a cavity to accommodate the differential pressure gauge 320. The box cover 312 is detachably mounted on the box body 311, forming a sealed cavity to prevent dust, moisture, or rainwater from entering the differential pressure gauge 320, thus achieving a waterproof effect and avoiding the risk of damage to the differential pressure gauge 320. Specifically, the box cover 312 is mounted on the box body 311 with bolts and nuts. In other embodiments, the box cover 312 can also use other fasteners such as a snap-fit ​​structure or a magnetic structure. Specifically, the box cover 312 can be made of a transparent material, allowing differential pressure data to be read without opening it. Two differential pressure gauges 320 are provided, installed inside the box body 311, with one end connected to the housing 100. The two differential pressure gauges 320 are used to detect the status of the two filters respectively, displaying the pressure difference value of the airflow passing through the filters in real time.

[0036] In this embodiment, refer to Figure 1The sealed door 200 includes a bag collar 210, a door body 220, a handle 230, and a clamping element 240. The bag collar 210 is positioned around the opening 140 of the housing 100. When the operator tightly places a special protective bag over the bag collar 210, an independent sealed operating space is formed. When replacing the filter, the operator reaches into the bag through the bag collar 210 to operate, preventing direct leakage of gas from inside the housing 100 to the external environment. The door body 220 is detachably mounted on the bag collar 210 and serves as the main sealing component of the opening 140, preventing gas in the ventilation duct 110 from leaking through the opening 140. The handle 230 is located on the surface of the door body 220, providing a gripping point for the operator and facilitating quick disassembly or installation of the door body 220. Four clamping members 240 are provided and distributed around the door body 220. They apply pressure evenly to tightly press the door body 220 onto the pocket ring 210, eliminating gaps at the interface and further preventing gas leakage from the connection between the door body 220 and the pocket ring 210. In other embodiments, six or more clamping members 240 may also be provided.

[0037] In this embodiment, refer to Figure 1 The air inlet shell 160 is provided with a first disinfection port 161, and the air outlet shell 170 is provided with a second disinfection port 171. The first disinfection port 161 can be connected to a disinfection medium, so that the disinfectant enters the ventilation duct 110 with the airflow to perform positive disinfection on the pre-filter, high-efficiency filter and the inner wall of the duct, and remove any pollutants that may remain on the air inlet side. The disinfectant flows out from the second disinfection port 171 to the designated disinfectant treatment unit.

[0038] In this embodiment, a detection scanning mechanism 500 is provided on the side of the housing 100 near the air outlet 130. It can scan the filtered gas in real time and monitor indicators such as particulate matter concentration, microbial activity or harmful gas components. By comparing the detection data with that of the air inlet 120, the interception efficiency of the filter can be directly verified to ensure that the discharged gas meets environmental protection or biosafety standards.

[0039] In this embodiment, a base support 600 is provided at the bottom of the housing 100 to increase the contact area between the housing 100 and the ground, so as to evenly transfer the weight of the equipment to the foundation and avoid local overload or direct contact between the housing and the foundation, which would cause the housing 100 to deform.

[0040] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A bag-in-bag-out filtration device, characterized in that, include: The housing (100) has a ventilation duct (110) inside. The housing (100) is provided with an air inlet (120) and an air outlet (130) communicating with the ventilation duct (110). One or more filters are movably installed inside the ventilation duct (110). The housing (100) is also provided with one or more openings (140) communicating with the ventilation duct (110). A sealing door (200) is provided with one or more and is detachably mounted on the opening (140); A detection component (300) is assembled on the side of the housing (100) near the sealing door (200), with one end connected to the housing (100); and A frame (400) is assembled inside the housing (100) and abuts against the filter; The enclosure (100) includes: a main body (150), an air inlet shell (160) connected to one end of the main body (150), an air outlet shell (170) connected to the other end of the main body (150), and a cover plate (180) connected to the side of the main body (150) facing away from the sealing door (200), wherein the ventilation passage (110) is formed between the main body (150) and the cover plate (180); The frame (400) and the main body (150) are both integrally bent and formed. One end of the frame (400) is embedded in the main body (150), and the other end is bent and connected to the end of the main body (150).

2. The bag-in-bag-out filtration device according to claim 1, characterized in that, The thickness of both the frame (400) and the main body (150) is 1.5mm-5.0mm.

3. The bag-in-bag-out filtration device according to claim 2, characterized in that, The thickness of both the frame (400) and the main body (150) is 1.5mm-2.5mm.

4. The bag-in-bag-out filtration device according to claim 3, characterized in that, The thickness of both the frame (400) and the main body (150) is 2.0 mm.

5. The bag-in-bag-out filtration device according to claim 1, characterized in that, The detection component (300) includes: a mounting box (310), and one or more differential pressure gauges (320) disposed inside the mounting box (310) and with one end connected to the housing (100).

6. The bag-in-bag-out filtration device according to claim 5, characterized in that, The mounting box (310) includes: a box body (311) with an internal cavity for accommodating the differential pressure gauge (320), and a box cover (312) detachably mounted on the box body (311).

7. The bag-in-bag-out filtration device according to claim 1, characterized in that, The sealed door (200) includes: a pocket ring (210) surrounding the opening (140), a door body (220) detachably mounted on the pocket ring (210), a handle (230) disposed on the door body (220), and a clamping member (240) disposed on the main body (150) for locking the door body (220).

8. The bag-in-bag-out filtration device according to claim 1, characterized in that, The air inlet shell (160) is provided with a first disinfection port (161), and the air outlet shell (170) is provided with a second disinfection port (171).

9. The bag-in-bag-out filtration device according to claim 1, characterized in that, The bag-in-bag-out filtration device further includes a detection and scanning mechanism (500) disposed inside the housing (100) near the air outlet (130).

10. The bag-in-bag-out filtration device according to claim 1, characterized in that, The bag inlet and bag outlet filter device further includes a base bracket (600) disposed at the bottom of the housing (100).

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