A filter mechanism special for vacuum glove box

Abstract

The utility model discloses a kind of filtering mechanisms special for vacuum glove box, it is related to vacuum glove box technical field, including filter tank body and the tank cover being installed on the upper end of filter tank body, the left side surface of filter tank body is both fixed with trachea being communicated in its inside on upper and lower ends, the lower surface of the tank cover is fixed with support ring, the outer portion of the support ring is fixed with sealing ring one, the lower surface of the tank cover is located the inside of support ring and is provided with filter piece;The front and rear two side surfaces of filter tank body and tank cover are commonly provided with positioning mechanism;The filtering mechanism special for vacuum glove box of the design, by setting positioning mechanism, the mechanical self-locking characteristic of ratchet and ratchet wheel is utilized, one-way pressing down fast locking of tank cover and the convenient unlocking after ratchet pawl disengagement are realized, and tank cover dismounting operation is significantly simplified;The design makes that operator can easily separate tank cover and maintain or medium replacement to filter piece, especially filter screen bag.

Description

Technical Field

[0001] This utility model relates to the field of vacuum glove box technology, and in particular to a special filtration mechanism for vacuum glove boxes. Background Technology

[0002] A glove box filter is a device used to filter harmful substances in the air. It is particularly suitable for medical, laboratory, and industrial fields. This device can effectively filter airborne particles, bacteria, viruses, and chemicals, protecting users from harmful substances.

[0003] For example, in the prior art patent with authorization announcement number CN219701413U, the utility model discloses a filter for a glove box, including a housing, a connecting component installed at the bottom of the housing, a plurality of filter components slidably connected inside the housing, a sealing plate fixedly connected to one end of each filter component, and a plurality of limiting components corresponding to the sealing plate installed on the side wall of the housing.

[0004] However, during the use of this filter, it was found that when multiple filter elements needed to be replaced, personnel had to manually pull multiple sealing plates outward. The jamming block caused significant resistance when personnel pulled the sealing plates outward, increasing the labor intensity of personnel and reducing work efficiency.

[0005] Chinese patent discloses a filter device for glove boxes (authorization announcement number CN222723850U). The patented technology is as follows: when it is necessary to disassemble and replace the filter components, the fixing of the sealing cover and the partition is stopped by the limiting device. At this time, the partition is driven to move upward by the pushing device, so that the partition drives multiple filter components to move upward and then move out from the top opening of the tank. This improves the convenience of replacing multiple filter components, reduces the labor intensity of manual pulling operation, and improves work efficiency.

[0006] It uses a handwheel to drive the connecting rod to rotate and open and lock the sealing cover, but this method has a significant drawback:

[0007] 1. The handwheel is exposed and has no anti-accidental touch mechanism. Accidental collisions or vibrations can cause the connecting rod to rotate, causing the pin to disengage from the truncated cone groove, resulting in the sealing cover being opened unexpectedly and compromising the airtightness of the system.

[0008] 2. The connecting rod must pass through both the sealing cover and the partition. There is a design gap in the sealing structure at the connection point. If a dynamic seal is not installed, gas may leak through the gap between the connecting rod and the sealing cover and partition, making it difficult to maintain a high-purity inert atmosphere in the filter canister. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a special filtration mechanism for vacuum glove boxes, which solves the problems mentioned in the background.

[0010] To achieve the above objectives, this utility model is implemented through the following technical solution: a special filter mechanism for vacuum glove boxes, including a filter tank body and a canister cover installed on the upper end of the filter tank body. Both the upper and lower ends of the left side surface of the filter tank body are fixedly connected to air pipes communicating with its interior. A support ring is fixedly connected to the lower surface of the canister cover. A sealing ring is fixedly sleeved on the outside of the support ring. A filter element is provided on the lower surface of the canister cover inside the support ring.

[0011] A stabilizing block one is fixedly connected to the right side surface of the filter tank body, and a stabilizing rod is movably connected through the inside of the stabilizing block one. A stabilizing block two is fixedly connected to the upper end of the stabilizing rod.

[0012] The front and rear surfaces of the filter tank body and the tank cover are both provided with positioning mechanisms. The positioning mechanism includes a rack and a positioning seat located outside the lower end of the rack. A support block is fixed to the upper end of the rack. A rotating rod is rotatably connected through the side surface of the positioning seat away from the filter tank body. A gear is fixed to one end of the rotating rod inside the positioning seat, and a ratchet is fixedly sleeved on the outside of the rotating rod outside the positioning seat. A positioning element is provided on the side surface of the positioning seat away from the filter tank body.

[0013] As a further technical solution of this utility model, the filter element includes a support plate, a sealing ring II is embedded and fixedly connected to the outer surface of the support plate, and a support rod is fixedly connected to the center position of the upper surface of the support plate. Multiple air holes are evenly opened inside the support plate outside the support rod, and a screw sleeve is fixedly connected to the upper surface of the support plate outside the air holes. A screw ring is threaded inside the screw sleeve, and a filter screen is fixedly connected to the upper end of the screw ring.

[0014] As a further technical solution of this utility model, the positioning component includes a spring, with a positioning block and a pawl fixedly connected to the upper and lower ends of the spring, respectively, and a positioning rod rotatably connected to the end of the pawl away from the rotating rod.

[0015] As a further technical solution of this utility model, the support ring is movably located inside the filter tank body, the outer surface of the sealing ring one is movably attached to the inner surface of the filter tank body, the stabilizing block two is fixed to the right side surface of the tank cover, the positioning seat is fixed to one side surface of the filter tank body, the support block is fixed to one side surface of the tank cover, and the gear is meshed with the rack.

[0016] As a further technical solution of this utility model, the support plate is located between the two air pipes, the outer surface of the second sealing ring is movably attached to the inner surface of the filter tank body, the upper end of the support rod is fixed to the lower surface of the tank cover, and the support rod is located inside the support ring.

[0017] As a further technical solution of this utility model, the pawl is attached to the ratchet, and the positioning block and the positioning rod are both fixed to the side surface of the positioning seat away from the filter tank body.

[0018] This utility model provides a special filtration mechanism for vacuum glove boxes, which has the following advantages compared with the prior art:

[0019] This design presents a dedicated filtration mechanism for vacuum glove boxes. By incorporating a positioning mechanism and utilizing the mechanical self-locking characteristics of a pawl and ratchet, it achieves rapid locking of the canister lid with a single downward press and convenient unlocking after the pawl disengages, significantly simplifying the canister lid disassembly and assembly. This design allows operators to easily separate the canister lid and maintain or replace the filter components, especially the filter screen. Simultaneously, it ensures that when the canister lid is closed and locked, sealing rings one and two receive sufficient pressure, maintaining high airtightness inside the filter canister and effectively ensuring that the overall sealing performance of the filtration mechanism is unaffected by disassembly and maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a filter mechanism specifically designed for vacuum glove boxes.

[0021] Figure 2 This is a partial internal schematic diagram of a filter mechanism specifically designed for vacuum glove boxes.

[0022] Figure 3 This is a schematic diagram of the filter element in a special filtration mechanism for vacuum glove boxes.

[0023] Figure 4 A schematic diagram of the structure of a stabilizer bar in a special filter mechanism for a vacuum glove box;

[0024] Figure 5 This is a schematic diagram of the positioning mechanism in a special filtration mechanism for vacuum glove boxes.

[0025] Figure 6 This is a cross-sectional view of a positioning seat in a special filter mechanism for a vacuum glove box;

[0026] Figure 7 This is a schematic diagram of the positioning component in a special filter mechanism for vacuum glove boxes.

[0027] In the diagram: 1. Filter tank body; 2. Tank cover; 3. Air pipe; 4. Support ring; 5. Sealing ring one; 6. Filter element; 7. Support plate; 8. Sealing ring two; 9. Support rod; 10. Air hole; 11. Screw sleeve; 12. Threaded ring; 13. Filter screen; 14. Stabilizing block one; 15. Stabilizing rod; 16. Stabilizing block two; 17. Positioning mechanism; 18. Rack; 19. Positioning seat; 20. Support block; 21. Rotating rod; 22. Gear; 23. Ratchet; 24. Positioning element; 25. Spring; 26. Positioning block; 27. Pawl; 28. Positioning rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-7 This utility model provides a technical solution for a special filtration mechanism for vacuum glove boxes: it includes a filter canister 1 and a canister cover 2 installed on the upper end of the filter canister 1. Air pipes 3, communicating with the interior of the filter canister 1, are fixedly connected to both the upper and lower ends of the left side surface of the filter canister 1. A support ring 4 is fixedly connected to the lower surface of the canister cover 2, and the support ring 4 is movably located inside the filter canister 1. A sealing ring 5 is fixedly sleeved on the outside of the support ring 4, and the outer surface of the sealing ring 5 movably fits against the inner surface of the filter canister 1. A filter element 6 is provided on the lower surface of the canister cover 2, inside the support ring 4. The filter element 6 includes a support plate 7, which is located... Between the two air pipes 3, a sealing ring 2 8 is embedded and fixed on the outer surface of the support plate 7. The outer surface of the sealing ring 2 8 is movably attached to the inner surface of the filter tank body 1. A support rod 9 is fixed at the center of the upper surface of the support plate 7. The upper end of the support rod 9 is fixed to the lower surface of the tank cover 2, and the support rod 9 is located inside the support ring 4. Multiple air holes 10 are evenly opened inside the support plate 7 outside the support rod 9. A threaded sleeve 11 is fixed on the upper surface of the support plate 7 outside the air holes 10. A threaded ring 12 is connected to the inside of the threaded sleeve 11. A filter screen bag 13 is fixed at the upper end of the threaded ring 12.

[0030] The lower air pipe 3 is used for air intake and is connected to the exhaust end of the vacuum glove box; the upper air pipe 3 is used for air exhaust and is connected to the air intake end of the vacuum glove box.

[0031] Both sealing ring 5 and sealing ring 8 are made of elastic material, preferably butyl rubber, which fits tightly against the inner wall of the filter tank 1 to achieve a sealing effect.

[0032] The filter bag 13 is used to filter the airflow, and its structure and function are the same as those of the filter bag in the Chinese patent for a glove box filter device (authorization announcement number CN222723850U).

[0033] like Figure 1 , Figure 2 , Figure 4-7 As shown, a stabilizing block 14 is fixedly attached to the right side surface of the filter tank 1. A stabilizing rod 15 is movably connected through the inside of the stabilizing block 14. A stabilizing block 2 16 is fixedly attached to the upper end of the stabilizing rod 15. The stabilizing block 2 16 is fixedly attached to the right side surface of the tank cover 2.

[0034] Both the front and rear surfaces of the filter tank body 1 and the tank cover 2 are provided with positioning mechanisms 17. The positioning mechanism 17 includes a rack 18 and a positioning seat 19 movably located outside the lower end of the rack 18. The positioning seat 19 is fixed to one side surface of the filter tank body 1. A support block 20 is fixed to the upper end of the rack 18, and the support block 20 is fixed to one side surface of the tank cover 2. A rotating rod 21 is rotatably connected through the side surface of the positioning seat 19 away from the filter tank body 1. A gear 22 is fixed to one end of the rotating rod 21 located inside the positioning seat 19. A ratchet 23 is fixedly sleeved on the outside of the positioning seat 19 and connected to the rack 18. A positioning element 24 is provided on the side surface of the positioning seat 19 away from the filter tank body 1. The positioning element 24 includes a spring 25. The upper and lower ends of the spring 25 are respectively fixedly connected to a positioning block 26 and a pawl 27. The pawl 27 is attached to the ratchet 23. The end of the pawl 27 away from the rack 21 is rotatably connected to a positioning rod 28. The positioning block 26 and the positioning rod 28 are both fixedly connected to the side surface of the positioning seat 19 away from the filter tank body 1.

[0035] Pad 27 engages with ratchet 23, allowing ratchet 23 and lever 21 to rotate clockwise normally, but not counterclockwise; when pad 27 is pulled away from ratchet 23, ratchet 23 and lever 21 can rotate counterclockwise.

[0036] When the canister lid 2 is placed on the filter canister body 1 from top to bottom, the rack 18 is inserted into the positioning seat 19 and meshes with the gear 22, thereby driving the gear 22 to rotate clockwise and fixing the canister lid 2 to the filter canister body 1 together; after pulling the pawl 27 away from the ratchet 23, the canister lid 2 can be pulled out upwards for easy maintenance of the filter element 6.

[0037] When the can lid 2 and the filter can body 1 are completely closed and pressed together, the pawl 27 is rigidly pressed by the spring 25, and its tip is completely embedded in the current tooth groove of the ratchet 23, forming an irreversible mechanical lock.

[0038] Stabilizing block 14, stabilizing rod 15, and stabilizing block 2 16 restrict the horizontal displacement of the can lid 2 during the opening and closing process, ensuring that the rack 18 and gear 22 always maintain a vertical meshing trajectory, and avoiding seal failure due to uneven load.

[0039] The working principle of this utility model is as follows: The lower air pipe 3 of the filter tank body 1 is connected to the exhaust end of the vacuum glove box, and the upper air pipe 3 is connected to the air inlet end of the glove box; the circulating gas enters the filter tank body 1 through the lower air pipe 3, passes through the air hole 10 of the support plate 7, is purified by the filter screen 13, and flows back to the glove box through the upper air pipe 3; when maintenance is required, pull the pawl 27 outward to disengage from the ratchet 23, lift the canister cover 2 so that the rack 18 drives the gear 22 to rotate counterclockwise, so that the canister cover 2 can be separated and the screw ring 12 can be unscrewed to replace the filter screen 13; when closing, press down the canister cover 2, the rack 18 drives the gear 22 to rotate clockwise and link with the ratchet 23, so that the pawl 27 is completely embedded in the tooth groove of the ratchet 23 under the action of the spring 25 to form a mechanical lock, and at the same time the sealing ring 5 and the sealing ring 8 are sealed by pressure.

[0040] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A special filter mechanism for vacuum glove boxes, characterized in that, The filter includes a filter tank body (1) and a canister cover (2) installed on the upper end of the filter tank body (1). Both the upper and lower ends of the left side surface of the filter tank body (1) are fixedly connected to the air pipes (3) that communicate with the interior. The lower surface of the canister cover (2) is fixedly connected to a support ring (4). A sealing ring (5) is fixedly sleeved on the outside of the support ring (4). A filter element (6) is provided on the lower surface of the canister cover (2) inside the support ring (4). A stabilizing block one (14) is fixedly connected to the right side surface of the filter tank body (1), and a stabilizing rod (15) is movably connected through the inside of the stabilizing block one (14). A stabilizing block two (16) is fixedly connected to the upper end of the stabilizing rod (15). The front and rear surfaces of the filter tank body (1) and the tank cover (2) are both provided with positioning mechanisms (17). The positioning mechanism (17) includes a rack (18) and a positioning seat (19) located outside the lower end of the rack (18). A support block (20) is fixedly connected to the upper end of the rack (18). A rotating rod (21) is rotatably connected to the side surface of the positioning seat (19) away from the filter tank body (1). A gear (22) is fixedly connected to one end of the rotating rod (21) inside the positioning seat (19), and a ratchet (23) is fixedly sleeved on the outside of the rotating rod (21) outside the positioning seat (19). A positioning element (24) is provided on the side surface of the positioning seat (19) away from the filter tank body (1).

2. The special filter mechanism for vacuum glove boxes according to claim 1, characterized in that, The filter element (6) includes a support plate (7), a sealing ring (8) is embedded and fixed on the outer surface of the support plate (7), and a support rod (9) is fixed at the center of the upper surface of the support plate (7). Multiple air holes (10) are evenly opened inside the support plate (7) outside the support rod (9), and a threaded sleeve (11) is fixed on the upper surface of the support plate (7) outside the air holes (10). A threaded ring (12) is threaded inside the threaded sleeve (11), and a filter screen (13) is fixed at the upper end of the threaded ring (12).

3. The special filter mechanism for vacuum glove boxes according to claim 1, characterized in that, The positioning component (24) includes a spring (25), and a positioning block (26) and a pawl (27) are fixedly connected to the upper and lower ends of the spring (25), respectively. The end of the pawl (27) away from the rotating rod (21) is rotatably connected to a positioning rod (28).

4. The special filter mechanism for vacuum glove boxes according to claim 1, characterized in that, The support ring (4) is movably located inside the filter tank body (1), the outer surface of the sealing ring (5) is movably attached to the inner surface of the filter tank body (1), the stabilizing block (16) is fixed to the right side surface of the tank cover (2), the positioning seat (19) is fixed to one side surface of the filter tank body (1), the support block (20) is fixed to one side surface of the tank cover (2), and the gear (22) is meshed with the rack (18).

5. A special filter mechanism for vacuum glove boxes according to claim 2, characterized in that, The support plate (7) is located between the two air pipes (3), the outer surface of the sealing ring (8) is movably attached to the inner surface of the filter tank body (1), the upper end of the support rod (9) is fixed to the lower surface of the tank cover (2), and the support rod (9) is located inside the support ring (4).

6. A special filter mechanism for vacuum glove boxes according to claim 3, characterized in that, The pawl (27) is attached to the ratchet (23), and the positioning block (26) and the positioning rod (28) are both fixed to the side surface of the positioning seat (19) away from the filter tank body (1).

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