Opening and closing device for controlling air inlet of filter cartridge

Abstract

The utility model discloses an opening and closing device for controlling air intake of a filter cartridge, which relates to the field of biomedical purification and comprises a filter cartridge body, a base welded at the bottom end of the filter cartridge body and an opening and closing mechanism used for sealing the top end of the filter cartridge body, the opening and closing mechanism comprises a top end cover plate arranged on the filter cartridge body, and the filter cartridge body is welded and fixed with the base. A screw rod fixing flange used for being connected with a screw rod through a bearing is arranged at the top end of the base located in the filter cylinder body, a screw seat is in threaded connection with the outer wall of the screw rod, two connecting shafts are symmetrically arranged at the top end of the screw seat, the top ends of the connecting shafts are connected with the bottom end of a cover plate, and a sealing ring adheres to the bottom end of the cover plate in the circumferential direction. The diameter of the outer wall of the cover plate, the diameter of the outer wall of the base and the diameter of the outer wall of the sealing ring are all larger than the diameter of the inner wall of the filter cartridge body, and the bottom end of the lead screw penetrates through the lead screw fixing flange and the base and extends out of the bottom end of the base. Therefore, the problem that the filter cartridge cannot be completely sealed when a pharmaceutical factory performs a leakproofness test and a sterilization test is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of biological medical purification, in particular to a device for controlling the opening and closing of an air inlet of a filter cartridge. Background Art

[0002] The pharmaceutical factory air intake and exhaust design standards are requirements for the design and construction of pharmaceutical factory air intake and exhaust systems based on relevant national laws, regulations and industry standards, combined with pharmaceutical factory production processes and environmental requirements. Its main purpose is to ensure that the gas discharged by the pharmaceutical factory meets environmental protection requirements while protecting the health and safety of the staff. Therefore, pharmaceutical factories conduct airtightness tests and sterilization tests on some equipment.

[0003] For the existing air intake and exhaust system layout, the filter cartridge is in a completely open state and cannot be effectively sealed, which will have a significant impact on the results of the required airtightness test. Utility Model Content

[0004] The utility model aims to provide a device for controlling the opening and closing of the air inlet of a filter cartridge, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for controlling the opening and closing of the air inlet of the filter cartridge, comprising a filter cartridge body, a base welded to the bottom end of the filter cartridge body and an opening and closing mechanism for sealing the top end of the filter cartridge body, the opening and closing mechanism comprising a top end cover plate arranged on the filter cartridge body, the filter cartridge body and the base are welded and fixed, the top end of the base located in the filter cartridge body is provided with a screw fixing flange for connecting a screw with a bearing, a screw seat is threadedly connected to the outer wall of the screw, the top end of the screw seat is symmetrical and provided with two connecting shafts, the top end of the connecting shaft is connected to the bottom end of the cover plate, the bottom end of the cover plate is circumferentially bonded with a sealing ring, the outer wall diameters of the cover plate, the base and the sealing ring are all larger than the inner wall diameter of the filter cartridge body, the bottom end of the screw passes through the screw fixing flange and the base, and extends out of the bottom end of the base.

[0006] Furthermore, the top bearing of the screw rod is connected to the screw rod support flange, and the top of the screw seat is provided with four guide holes at equal intervals along the circumferential direction. A guide shaft is fitted and slidably connected in the guide hole, and the two ends of the guide shaft are respectively connected to the top end of the screw rod fixing flange and the bottom end of the screw rod support flange.

[0007] Furthermore, a mounting hole is provided at the bottom end of the screw fixing flange below the connection between the screw fixing flange and the screw bearing, and a shaft seal which is sleeved and connected to the outer wall of the screw is provided in the mounting hole.

[0008] Furthermore, the screw fixing flange and the top end of the base, the top end of the connecting shaft and the bottom end of the cover plate, and both ends of the guide shaft are respectively fixed to the top end of the screw fixing flange and the bottom end of the screw supporting flange by screws.

[0009] Furthermore, two sockets for plugging the connecting shaft are symmetrically arranged on the top of the wire seat.

[0010] The beneficial effects achieved by the utility model are:

[0011] 1. The opening and closing of the opening and closing device is controlled by an external motor, which effectively solves the problem that the filter cartridge cannot be completely sealed during the tightness test and sterilization test in the pharmaceutical factory;

[0012] 2. By arranging four guide shafts between the screw fixing flange and the screw supporting flange, and cooperating with the top of the screw seat to arrange four guide holes with equal intervals along the circumferential direction, the inner wall of which is respectively slidably connected with the outer wall of the four guide shafts, the screw seat can be more stable in the movement process and the force can be evenly applied, and at the same time, it can avoid the sealing ring being unable to completely fit with the top of the filter cartridge due to the unstable operation of the screw seat, thereby ensuring the sealing performance;

[0013] 3. The screw fixing flange and the top of the base, the top of the connecting shaft and the bottom of the cover plate, and the two ends of the guide shaft are respectively fixed with the top of the screw fixing flange and the bottom of the screw support flange by screws, and two sockets for plugging the connecting shaft are symmetrically arranged at the top of the screw seat, so that the opening and closing mechanism as a whole becomes detachable and can be directly installed on a new filter cartridge. The replacement of the filter cartridge does not affect the normal use of the opening and closing mechanism;

[0014] 4. The opening and closing mechanism adopts a screw nut assembly, which has a simple structure, is easy to install, has low cost and high cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of a device for controlling the opening and closing of an air inlet of a filter cartridge in an embodiment;

[0016] Figure 2 Schematic diagram of the structure of the opening and closing mechanism in the embodiment. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 and 2As shown, the utility model discloses an opening and closing device for controlling the air inlet of a filter cartridge, comprising: a filter cartridge body 1, a base 3 welded to the bottom end of the filter cartridge body and an opening and closing mechanism for sealing the top end of the filter cartridge body, the opening and closing mechanism comprising a cover plate 2 respectively arranged at the top end of the filter cartridge body 1, the filter cartridge body 1 and the base 3 are welded and fixed, a screw fixing flange 4 for connecting a screw 5 with a bearing is arranged at the top end of the base 3 located in the filter cartridge body 1, a screw seat 6 is threadedly connected to the outer wall of the screw 5, the top end of the screw seat 6 is symmetrical and provided with two connecting shafts 7, the top end of the connecting shaft 7 is connected to the bottom end of the cover plate 2, a sealing ring 8 is circumferentially bonded to the bottom end of the cover plate 2, the outer wall diameters of the cover plate 2, the base 3 and the sealing ring 8 are all larger than the inner wall diameter of the filter cartridge body 1, the bottom end of the screw 5 passes through the screw fixing flange 4 and the base 3 in sequence, and extends out of the bottom end of the base 3, and is transmission-connected to the execution end of an external motor through a coupling.

[0019] Further, such as Figure 1 and 2 As shown, in order to increase the stability of the wire seat when it moves, the top bearing of the screw rod 5 is connected to the screw rod support flange 9, and the top of the wire seat 6 is provided with four guide holes 61 at equal intervals along the circumferential direction. A guide shaft 62 is fitted and slidably connected in the guide hole 61, and the two ends of the guide shaft 62 are respectively connected to the top of the screw rod fixing flange 4 and the bottom end of the screw rod support flange 9. When the wire seat 6 moves up and down, the inner wall of the guide hole 61 slides up and down along the outer wall of the guide shaft 62, and the guide shaft 62 limits the wire seat 6 through the guide hole 61.

[0020] Further, such as Figure 1 As shown, the sealing between the screw fixing flange and the screw is increased, and a mounting hole 41 is provided at the bottom end of the screw fixing flange 4 below the connection between the screw fixing flange 4 and the screw 5 bearing, and a shaft seal 42 which is sleeved and connected to the outer wall of the screw 5 is provided in the mounting hole 41.

[0021] Further, such as Figure 1 and 2 As shown, in order to reduce maintenance costs and facilitate disassembly, the screw fixing flange 4 and the top of the base 3, the top of the connecting shaft 7 and the bottom of the cover 2, and the two ends of the guide shaft 62 are respectively fixed to the top of the screw fixing flange 4 and the bottom of the screw support flange 9 by screws.

[0022] Further, such as Figure 1 As shown, in order to reduce maintenance costs and facilitate disassembly, two sockets 63 for plugging the connecting shaft 7 are symmetrically provided at the top of the wire seat 6. Specifically, a connecting rod is integrally provided at the bottom end of the connecting shaft 7, and the connecting rod is inserted into the socket 63.

[0023] Based on the above structure, Figure 1 and 2As shown, when in use, the actuator end of the external motor drives the screw rod 5 to rotate through the coupling, the screw rod 5 drives the screw seat 6 to move up and down through the threaded connection between the screw rod 5 and the screw seat 6, and the screw seat 6 drives the cover plate 2 and the sealing ring 8 to move up and down through the connecting shaft 7;

[0024] Specifically, when the screw 5 rotates clockwise, the screw seat 6 moves toward the screw fixing flange 4, driving the cover plate 2 to move downward, and finally the cover plate 2 is completely fitted with the top of the filter cartridge body 1, and the filter cartridge body 1 stops taking in air;

[0025] When the screw 5 moves counterclockwise, the screw seat 6 moves toward the screw support flange 9, driving the cover plate 2 forward and upward, so that the cover plate 2 and the top of the filter cartridge body 1 are released from the fitting state, and the filter cartridge body 1 begins to take in air, and the air enters from the cover plate 2 and exits from the four sides of the filter cartridge body 1.

[0026] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A device for controlling the opening and closing of an air inlet of a filter cartridge, comprising a filter cartridge body (1) and a base (3) welded to the bottom end of the filter cartridge body (1), characterized in that: The filter cartridge (1) further comprises an opening and closing mechanism for sealing the top end of the filter cartridge body (1), the opening and closing mechanism comprising a cover plate (2) respectively arranged at the top end of the filter cartridge body (1), the filter cartridge body (1) and the base (3) being welded and fixed, the top end of the base (3) located in the filter cartridge body (1) being provided with a screw fixing flange (4) for bearing-connecting a screw (5), the outer wall of the screw (5) being threadedly connected with a screw seat (6), the top end of the screw seat (6) being symmetrical and provided with two connecting shafts (7), the top end of the connecting shaft (7) being connected to the bottom end of the cover plate (2), the bottom end of the cover plate (2) being bonded with a sealing ring (8) along the circumferential direction, the outer wall diameters of the cover plate (2), the base (3) and the sealing ring (8) being larger than the inner wall diameter of the filter cartridge body (1), the bottom end of the screw (5) passing through the screw fixing flange (4) and the base (3) and extending out of the bottom end of the base (3).

2. The device for controlling the opening and closing of the air inlet of the filter cartridge according to claim 1, characterized in that: The top bearing of the screw rod (5) is connected to a screw rod support flange (9), and the top of the screw seat (6) is provided with four guide holes (61) at equal intervals along the circumferential direction. A guide shaft (62) is fitted and slidably connected in the guide hole (61), and the two ends of the guide shaft (62) are respectively connected to the top end of the screw rod fixing flange (4) and the bottom end of the screw rod support flange (9).

3. The device for controlling the opening and closing of the air inlet of the filter cartridge according to claim 2, characterized in that: A mounting hole (41) is provided at the bottom end of the screw fixing flange (4) below the connection between the screw fixing flange (4) and the screw (5) bearing, and a shaft seal (42) which is sleeved and connected to the outer wall of the screw (5) is provided in the mounting hole (41).

4. The device for controlling the opening and closing of the air inlet of the filter cartridge according to claim 2, characterized in that: The screw fixing flange (4) and the top end of the base (3), the top end of the connecting shaft (7) and the bottom end of the cover plate (2), and both ends of the guide shaft (62) are respectively fixed to the top end of the screw fixing flange (4) and the bottom end of the screw supporting flange (9) by screws.

5. The device for controlling the opening and closing of the air inlet of the filter cartridge according to claim 2, characterized in that: Two insertion holes (63) for inserting the connecting shaft (7) are symmetrically arranged at the top end of the wire seat (6).

Images