Integrated bag-in and bag-out type filter capable of being automatically sealed

Abstract

The invention relates to the technical field of purification medical treatment, and particularly discloses a self-sealing integrated bag-in and bag-out type filter which comprises a filter shell, a filter element and a safety bag, the filter shell comprises a box body and a box door, a plurality of hooks and a hanging buckle are arranged in a replacement opening of the box body, the filter element extends into the box body through the replacement opening, and the safety bag is arranged in the box body. The safety bag comprises a bag body and an elastic rope, one end of the bag body is in sealed connection with the side face, facing the box door, of the filter element, the other end of the bag body is open, the elastic rope is connected with the open end of the bag body, and the part, extending out of the open end of the bag body, of the elastic rope is connected with a plurality of hooks and hanging buckles; the integrated design of the filter element and the safety bag is adopted, operation and maintenance personnel do not need to operate the filter element through the safety bag during operation, and operation convenience and reliability are improved; and after the filter element is completely drawn out, toxic and harmful substances can be prevented from leaking to the greatest extent through the provided two-step sealing process, and meanwhile, operation and maintenance personnel are prevented from being in direct contact with the filter element.

Description

Technical Field

[0001] The invention relates to the technical field of medical purification, and in particular discloses a self-sealing integrated bag-in-bag-out filter. Background Art

[0002] The filter is one of the cores that distinguish the purification ventilation and air conditioning system from the general ventilation and air conditioning system. It mainly includes the primary and medium efficiency filters of the air conditioning unit and the terminal high efficiency filter. The working principle of the filter is to use the van der Waals force to absorb toxic and harmful substances such as dust, bacteria, viruses in the air to achieve the purpose of forming a clean environment. The filter is a consumable in the operation and maintenance of the purification project. The recommended replacement time for the primary, medium and high efficiency filters is when the air conditioning unit has accumulated 600, 1800 and 7200 hours of operation (or the control system feedback blockage alarm).

[0003] At present, most purification projects still use direct replacement for filter replacement. During the replacement process, the old filter element is directly exposed to the air, causing the leakage of toxic and harmful substances such as dust, bacteria, and viruses in the filter. Especially for the terminal high-efficiency filters located in the operating room and laboratory operation area, direct replacement will cause the above-mentioned clean environment pollution and also threaten the health of operation and maintenance personnel.

[0004] In addition, for a small number of bag-in, bag-out filter products that have appeared, operation and maintenance personnel need to replace the filter element through a safety bag. After replacement, the end of the safety bag is still stuck on the outer frame of the filter, which is inconvenient to operate and easily causes secondary leakage of pollutants. Therefore, the usage rate is not high.

[0005] For example, the invention patent with application number 2017103036117 discloses a bag-in-bag-out filter replacement device, including an air filter box, the inlet and outlet ends of the air filter box are respectively equipped with a bag-in safety bag for installing a new filter and a bag-out safety bag for replacing an old filter; the air filter box is installed with the bag-in safety bag and the bag-out safety bag through the sealing grooves on the flanges at its inlet and outlet ends; the bag-in safety bag is provided with a tightening ring and a tightening tie at each length of a filter replaced. The bag-in-bag-out filter replacement device disclosed in the invention requires frequent operation of the filter element through a safety belt during operation, which makes the operation difficult, and it is easy to accidentally break the safety bag during manual operation, resulting in the failure of its isolation effect. Based on the above problems existing in the prior art, the present invention proposes a self-sealing integrated bag-in-bag-out filter that can effectively solve the above problems. Summary of the invention

[0006] The object of the present invention is an integrally bag-in-bag-out filter that can self-seal, so as to solve the deficiency that the existing filter cannot automatically isolate the filter element from the external environment during the process of removing the filter element when used in the medical purification field.

[0007] The present invention is realized through the following technical solutions: An integrally bag-in-bag-out filter that can self-seal, including a filter housing, a filter element and a safety bag. The filter housing includes a box body and a box door. The box door is detachably connected to the replacement opening of the box body. Multiple hooks and a buckle with a release mechanism are arranged in the replacement opening of the box body; The filter element is arranged in the box body through the replacement opening. The safety bag includes a bag body and an elastic cord. One end of the bag body is hermetically connected to the side of the filter element facing the box door. The other end of the bag body is open. The elastic cord is connected to the open end of the bag body, and the part of the elastic cord extending out of the open end of the bag body is connected to multiple hooks and the buckle.

[0008] As a further setting of the above solution, four hooks are provided. The four hooks are respectively arranged at the four corners of the replacement opening of the box body. The buckle is arranged at the middle position of the upper end or the lower end of the replacement opening of the box body. As a further setting of the above solution, receiving grooves are respectively opened at the upper and lower ends of the left and right side walls of the replacement opening of the box body. Movable arc-shaped hooks are rotatably arranged in the receiving grooves, and tooth surfaces are arranged on the outer sides of the movable arc-shaped hooks. Rotating vertical rods penetrate through the left and right ends of the box body. Small gears meshing with the tooth surfaces on the corresponding movable arc-shaped hooks are arranged at the upper and lower ends of the rotating vertical rods. The end of the rotating vertical rod extending out of the box body is connected with a screwing cap.

[0009] As a further setting of the above solution, arc-shaped sliding rails are fixedly arranged on the upper and lower groove walls of each receiving groove. The movable arc-shaped hook is slidably arranged between the upper and lower arc-shaped sliding rails.

[0010] As a further setting of the above solution, receiving grooves are respectively opened at the upper end or the lower end of the replacement opening of the box body. The buckle is connected to the middle position of the upper end or the lower end of the replacement opening of the box body through a flexible connecting piece, and can be arranged in the receiving groove under the action of the flexible connecting piece.

[0011] As a further setting of the above solution, a rolled edge is arranged at the open end of the bag body. The elastic cord is arranged in the rolled edge, and through holes corresponding to multiple hooks and the buckle are opened on the rolled edge. The elastic cord is connected to the hook and the buckle after extending out of the rolled edge.

[0012] As a further setting of the above solution, the filter element is designed as a cuboid that fits the inner cavity of the box body, and a leather handle is arranged on the outer side of the filter element facing the box door.

[0013] As a further configuration of the above solution, a plurality of connecting screw holes are provided on the side of the box replacement port, and bolts or screws matching the connecting screw holes are provided on the box door.

[0014] As a further configuration of the above solution, a steel handle is provided on the outer side of the door.

[0015] As a further configuration of the above solution, the bag body of the safety bag is a retractable and foldable bag body.

[0016] Beneficial effects: 1. The bag-in-bag-out filter disclosed in the present invention can wrap the filter element in a safety bag while the filter element is being pulled out, so that the filter element will not come into contact with the external environment, thereby preventing dust, bacteria, viruses and other toxic and harmful substances adsorbed in the filter element from leaking, which is beneficial to maintaining a clean environment and protecting the health of operation and maintenance personnel.

[0017] 2. The bag-in, bag-out filter disclosed in the present invention adopts an integrated design of filter element and safety bag. The operation and maintenance personnel do not need to operate the filter element through the safety bag during operation, which improves the convenience and reliability of operation. After the filter element is completely pulled out, the two-step sealing process provided can prevent the leakage of toxic and harmful substances to the greatest extent, while avoiding direct contact between the operation and maintenance personnel and the filter element.

[0018] 3. The bag-in, bag-out filter disclosed in the present invention further improves the design of the hook and the buckle at the replacement port. When extracting or inserting a new filter element, the operation and maintenance personnel can turn the screw cap, and then receive the hook into the storage slot under the meshing transmission of the gear tooth surface, thereby avoiding the fixed design of the hook and the buckle from causing obstacles in the process of extracting and inserting the filter element; in addition, the external force when the elastic rope slips off the hook can be adjusted by the rotation extension length of the movable arc hook extending from the storage slot, thereby avoiding the shortcoming of the fixed hook that the elastic rope is difficult to slip out of the storage slot under the action of external force, thereby improving its convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the external structure of the filter of the present invention.

[0021] Figure 2 Schematic diagram of the internal structure of the filter of the present invention.

[0022] Figure 3 Side view structure schematic diagram of the internal structure of the present invention.

[0023] Figure 4 Schematic diagram of the internal partial structure (node A) of the present invention.

[0024] Figure 5 Schematic diagram of the internal partial structure (node B) of the present invention.

[0025] Figure 6 Schematic diagram of the process of removing the filter element of the filter of the present invention.

[0026] Figure 7 Schematic diagram of the process of installing the filter element of the filter of the present invention.

[0027] Figure 8 Schematic diagram of the partial structure on the box body in Embodiment 2 of the present invention; Figure 9 Schematic diagram of the three-dimensional structure such as the movable arc-shaped hook and the small gear in Embodiment 2 of the present invention; Figure 10 For the present invention Figure 9 Enlarged structure schematic diagram at C in.

[0028] In the figure: 1. Filter housing; 11. Box body; 12. Box door; 13. Steel handle; 14. Bolt or screw; 15. Hanging buckle; 16. Hook; 2. Filter element; 21. Leather handle; 3. Safety bag; 31. Elastic cord; 32. Bag body; 110. Storage groove; 17. Arc-shaped slide rail; 18. Movable arc-shaped hook; 181. Tooth surface; 19. Rotating vertical rod; 191. Small gear; 192. Screw cap. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the attached Figures 1 to 10 drawings, and will describe the present application in detail in combination with the embodiments.

[0031] Embodiment 1 Embodiment 1 discloses an integrated bag-in and bag-out filter that can be self-sealed. Refer to the attached Figures 1 to 7, the main body of the filter includes a filter housing 1, a filter element 2, and a safety bag 3. The filter housing 1 consists of a box body 11 and a box door 12. On one side end of the box body 11, there is an opening for inserting or removing the filter element 2, and then a plurality of connecting screw holes are evenly opened around the opening. Then, the box door 12 is hermetically attached to the opening, and a detachable sealing connection is made between it and the opening of the box body 11 through bolts or screws 14. In addition, in order to facilitate the opening of the box door 12, a rigid handle 13 that is convenient to pull can be provided on the outer side surface of the box door 12.

[0032] The filter element 2 is designed in a cuboid shape that fits the inner cavity of the box body 11, so that it can be inserted into the inner cavity of the box body 11 along the opening, and after being inserted, it can fit the inner cavity wall of the box body 11 to prevent gas from flowing through the gap between the two during filtration and purification. In addition, in order to facilitate the removal of the filter element 2 from the box body 11, a leather handle 21 is provided on the outer side surface of the filter element 2 facing the box door 12.

[0033] The safety bag 3 includes a retractable and foldable bag body 32. One end of the bag body 32 is open, and the other end is hermetically connected to the outer side surface of the filter element 2 facing the box door 12 as a whole. At the same time, an elastic cord 31 is provided at the edge of the open end of the bag body 32. Specifically, the elastic cord 21 can be provided in the rolled edge of the open end of the bag body 32, and through holes for a part of the elastic cord 21 to extend out are opened in the rolled edges at the four corners of the bag body 32.

[0034] At each of the four corners of the inner wall of the opening of the box body 11, a hook 16 that can hook the elastic cord 21 is provided. Then, a hanging buckle 15 is provided at the middle position of the top wall or the bottom wall at the open end of the box body 11. Then, through holes for a part of the elastic cord 21 to extend out are also opened in the rolled edge of the open end of the bag body 32, so that this part of the elastic cord 21 can be connected to the hanging buckle 15. At the same time, a corresponding unlocking mechanism is provided on the hanging buckle 15, and the operator can actively release the connection of the hanging buckle 15 to the elastic cord 21 through the unlocking mechanism.

[0035] When the self-sealing integrated bag-in and bag-out filter disclosed in Embodiment 1 needs to replace the filter element 2, first manually or using a screwdriver to remove the bolts or screws 14 on the box door 12, and then remove the box door 12 from the open end of the box body 11 through the rigid handle 13.

[0036] Subsequently, the operator then holds the leather handle 21 and slowly pulls out the filter element 2 to be replaced from the open end of the box door 12. During the slow outward extraction of the filter element 2, the bag body 32 of the safety bag 3 can be reversely sleeved on the filter element 2 under the action of external force (that is, the four side surfaces and the side surface facing the box door 12 of the filter element 2 are all sleeved into the bag body 32), and during the outward extraction of the filter element 2, it is necessary to avoid excessive force or too fast speed to prevent the elastic cord 21 from slipping off the hook 16 in advance.

[0037] After the bag body 32 completely sleeves the filter element 2, continue to pull it outwards and forcibly pull the elastic cord 21 at the open end of the bag body 32 until it slips off the hook 16. When the elastic cord 21 slips off the four hooks 16, due to its own elastic contraction, the open end of the bag body 32 will contract towards the center, completing the first step of sealing the filter element 2. Then, continue to pull the filter element 2 outwards. At this time, only the middle position of the upper or lower end of the elastic cord 31 is pulled by the buckle 15, causing the open end of the bag body 32 to further tighten, completing the second step of sealing. Finally, when the elastic cord 21 completely tightens and seals the open end of the bag body 32, directly press the unlocking mechanism on the buckle 15 to release the connection of the elastic cord 21, so that the entire safety bag 3 is completely separated from the filter housing 1. After separation, further seal the bag mouth completely through the elastic cord 31.

[0038] When installing a new filter element 2, the operator holds the leather handle 21 and inserts it into the inside of the box body 11 along the replacement opening of the box body 11. At the same time, attention should be paid not to touch the working part of the filter element to avoid contaminating the filter element 2. When the filter element 2 is completely installed inside the box body 11, fold the bag body 32 and store it in the replacement opening of the box body 11. Then, pull out a part of the elastic cords 31 at the four corners of the open end of the bag body 32 and connect them to each hook 16 first, and then pull out the middle part of the elastic cord 31 and connect it to the buckle 15. When the assembly of the safety bag 3 is completed, seal and connect the box door 12 to the replacement opening of the box body 11 through bolts or screws.

[0039] Embodiment 2 Embodiment 2 discloses an improved design of the connection method between the hook 16 and the box body 11 based on the technical solution in Embodiment 1, and the same parts as those in Embodiment 1 will not be described again.

[0040] Refer to the attached Figures 8 to 10 , in this Embodiment 2, receiving grooves 110 are respectively opened at the upper and lower ends of the left and right side walls of the box body 11 near the replacement opening. Arc-shaped sliding rails 17 are fixed on the upper and lower walls of each receiving groove 110. Then, a movable arc-shaped hook 18 that is slidably connected to them is arranged between the upper and lower arc-shaped sliding rails 17, so that the movable arc-shaped hook 18 replaces the fixedly arranged hook 16 in Embodiment 1. At the same time, corresponding tooth surfaces 181 are arranged on the outer circumferential surface of the movable arc-shaped hook 18.

[0041] Rotating vertical rods 19 are vertically penetrated through the left and right side surfaces of the box body 11. Small gears 191 meshing with the tooth surface 181 are fixedly arranged in the upper and lower receiving grooves 110 where the rotating vertical rods 19 are located. In addition, a screwing cap 192 is arranged at the upper end or the lower end of the rotating vertical rod 19 extending out of the box body 11, and the rotating vertical rod 19 can be conveniently rotated and screwed through the screwing cap 192.

[0042] In addition, in the second embodiment, the hanging buckle 15 can be movably connected to the middle of the upper end or the lower end of the replacement opening of the box body 11 through a flexible connecting piece, and a corresponding receiving groove is also formed in its top wall or bottom wall, so that the hanging buckle 15 can be installed in the receiving groove.

[0043] With the above design in the second embodiment, before the filter element 2 is installed inside the box body 11, the two screwing caps 192 can be rotated first to rotate the rotating vertical rods 19. Then, under the meshing transmission between the small gears 191 and the tooth surface 181, all four movable arc-shaped hooks 18 are received into the corresponding receiving grooves 110. Then, the hanging buckle 15 is also pressed into the receiving groove. At this time, there is no obstruction at the replacement opening of the box body 11, and the filter element 2 can be conveniently installed inside the box body 11 through the replacement opening.

[0044] Subsequently, the user rotates the two screwing caps 192 in the reverse direction. Through the action among the rotating vertical rods 19, the small gears 191 and the tooth surface 181, all four movable arc-shaped hooks 18 extend out of the receiving grooves 110, so that a part of the elastic rope 31 can be pulled out from the corners of the four bags 32 and hooked to the movable arc-shaped hooks 18. Then, the hanging buckle 15 is buckled out of the receiving groove, and a part of the elastic rope 31 is pulled out from the middle of the upper end or the lower end of the bag 32 and connected to the hanging buckle 15.

[0045] Similarly, during the process of pulling out the filter element 2 for replacement, the movable arc-shaped hooks 18 can be rotated to extend into the receiving grooves 110 and the elastic rope 31 can be received together. After the filter element 2 is pulled out of the box body 11, the movable arc-shaped hooks 18 are rotated to extend out a part, so that the elastic rope 31 can continue to slip off the movable arc-shaped hooks 18 under the action of a certain external force, and the magnitude of the external force during slipping can be determined by the rotating extension length of the movable arc-shaped hooks 18 extending out of the receiving grooves 110.

[0046] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-sealing integrated bag-in-bag-out filter, comprising a filter housing (1), a filter element (2) and a safety bag (3), wherein the filter housing (1) comprises a box body (11) and a box door (12), wherein the box door (12) is detachably connected to a replacement opening of the box body (11), and wherein: A plurality of hooks (16) and a hook (17) with a release mechanism are arranged in the replacement opening of the box body (11); The filter element (2) is extended into the box body (11) through the replacement port, and the safety bag (3) comprises a bag body (32) and an elastic rope (31). One end of the bag body (32) is sealed and connected to the side of the filter element (2) facing the box door (12), and the other end of the bag body (32) is open. The elastic rope (31) is connected to the open end of the bag body (32), and the part of the elastic rope (31) extending out of the open end of the bag body (32) is connected to a plurality of hooks (16) and hooks (17).

2. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: Four hooks (16) are provided, and the four hooks (16) are respectively provided at four corners of the replacement opening of the box body (11), and the hook (17) is provided at a middle position of the upper end or the lower end of the replacement opening of the box body (11).

3. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: The upper and lower ends of the left and right side walls of the replacement opening of the box body (11) are provided with storage grooves (110), a movable arc hook (18) is rotatably arranged in the storage groove (110), and the outer side surface of the movable arc hook (18) is provided with a tooth surface (181), and the left and right ends of the box body (11) are penetrated by a rotating vertical rod (19), and the upper and lower ends of the rotating vertical rod (19) are provided with a small gear (191) meshing with the tooth surface (181) on the corresponding movable arc hook (18), and the end of the rotating vertical rod (19) extending out of the box body (11) is connected to a screw cap (192).

4. The self-sealable integrated bag-in-bag-out filter according to claim 3, characterized in that: An arc-shaped slide rail (17) is fixedly arranged on the upper and lower groove walls of each storage groove (110), and the movable arc-shaped hook (18) is slidably arranged between the upper and lower arc-shaped slide rails (17).

5. The self-sealable integrated bag-in-bag-out filter according to claim 3, characterized in that: The upper end or the lower end of the replacement opening of the box body (11) is provided with a receiving groove, and the hanging buckle (16) is connected to the middle position of the upper end or the lower end of the replacement opening of the box body (11) through a flexible connecting piece, and can be extended into the receiving groove under the action of the flexible connecting piece.

6. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: The open end of the bag body (32) is provided with a curling edge, the elastic cord (31) is arranged in the curling edge, and the curling edge is provided with through holes corresponding to a plurality of hooks (16) and hooks (17), and the elastic cord (31) is connected to the hooks (16) and the hooks (17) after extending out of the curling edge.

7. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: The filter element (2) is configured to be in the shape of a rectangular parallelepiped designed to fit the inner cavity of the box body (11), and a leather handle (21) is provided on the outer side of the filter element (2) facing the box door (12).

8. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: A plurality of connection screw holes are provided on the side of the replacement opening of the box body (11), and bolts or screws (14) matching the connection screw holes are provided on the box door (12).

9. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: A steel handle (13) is provided on the outer side of the box door (12).

10. The self-sealable integrated bag-in-bag-out filter according to claim 1, characterized in that: The bag body (32) of the safety bag (3) is a retractable and foldable bag body structure.

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