Isolator drive seal flange

Abstract

The utility model provides an isolator drive sealing flange relates to the field of biological medical purification, including with the base that filter body bottom fixed connection and be used to seal the open and close mechanism of filter body top, the bottom of filter body has the second seal ring and third seal ring, the base bottom has the fourth seal ring. The utility model discloses a filter body bottom and base bottom set up seal ring, can effectively prevent harmful gas from the gap between filter body and base connecting place and leak.

Description

Technical Field

[0001] This utility model relates to the field of biomedical purification, and in particular to a sealing flange for an isolator transmission device. Background Technology

[0002] The invention, CN222151268U, entitled "A Device for Controlling the Opening and Closing of the Air Inlet of a Filter Cartridge," discloses a device for controlling the opening and closing of the air inlet of a filter cartridge, relating to the field of biomedical purification. It includes a filter body, a base welded to the bottom of the filter body, and an opening and closing mechanism for sealing the top of the filter body. The opening and closing mechanism includes a top cover plate disposed on the filter body. The filter body is welded and fixed to the base. A screw fixing flange for connecting a screw rod to a bearing is provided at the top of the base inside the filter body. A screw seat is threaded onto the outer wall of the screw rod. Two connecting shafts are symmetrically arranged at the top of the screw seat, and the tops of the connecting shafts are connected to the bottom of the cover plate. The main problem with this structure is that this high-efficiency filter is mainly used in isolators in biopharmaceutical plants. The substances produced in the isolator cavity are toxic, and leakage would be harmful to production personnel. Therefore, the airtightness of the transmission structure is very important, and leakage is not allowed. However, in this patented product, the screw fixing flange is fixed to the top of the base, and the guide shaft is fixed to the top of the screw fixing flange with bolts. In practical applications, there is a risk that harmful gases will leak into the outside through the screw holes. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a sealing flange for the isolator transmission device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The isolator transmission device sealing flange includes a base and an opening / closing mechanism. The base is fixedly connected to the bottom end of the filter body, and the base has a shaft hole for the lead screw to pass through. The opening / closing mechanism includes a cover plate disposed at the top end of the filter body, a lead screw fixing flange disposed inside the filter body and fixedly connected to the base, and a lead screw bearing connected to the lead screw fixing flange. A lead screw seat is threadedly connected to the outer wall of the lead screw. Two connecting shafts are symmetrically disposed at the top end of the lead screw seat. The top end of the connecting shaft is connected to the bottom end of the cover plate. A first sealing ring is circumferentially bonded to the bottom end of the cover plate. The feature is that it also includes a second sealing ring and a third sealing ring disposed at the bottom end of the filter body, and a fourth sealing ring disposed at the bottom end of the base.

[0005] Furthermore, the outer ring of the second sealing ring is fitted with the outer ring of the filter body, and the diameter of the outer ring of the second sealing ring is larger than the outer wall diameter of the filter body.

[0006] Furthermore, the inner ring of the third sealing ring is fitted with the inner ring of the filter body, and the diameter of the inner ring of the third sealing ring is larger than the inner wall diameter of the filter body.

[0007] Furthermore, the outer ring of the fourth sealing ring is fitted with the outer ring of the base, and the diameter of the outer ring of the fourth sealing ring is larger than the inner wall diameter of the base.

[0008] Furthermore, the first sealing ring, the second sealing ring, the third sealing ring, and the fourth sealing ring are all circular rings with a semi-circular cross-section. The side that adheres to the filter body or the base is a flat plane, and the other side is a semi-circular protrusion.

[0009] Furthermore, the first sealing ring, the second sealing ring, the third sealing ring, and the fourth sealing ring are made of silicone rubber.

[0010] Furthermore, the lead screw fixing flange is circular in shape, and a mounting hole is provided at the top of the lead screw fixing flange located below the connection between the lead screw fixing flange and the lead screw bearing. A shaft seal fitted onto the outer wall of the lead screw is provided in the mounting hole, and the lead screw fixing flange and the base are connected by welding.

[0011] Furthermore, an internally threaded cylindrical pin is connected between the screw fixing flange and the screw support flange. The end of the internally threaded cylindrical pin connected to the screw fixing flange is welded, and the end of the internally threaded cylindrical pin connected to the screw support flange is bolted.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The sealing flange of the isolator transmission device of this utility model seals the gap between the filter body and the base by setting a second sealing ring and a third sealing ring at the bottom of the filter body, preventing harmful gases from escaping to the outside through the gap at the connection between the filter body and the base. At the same time, a fourth sealing ring is set at the bottom of the base to seal the contact point between the base and the external equipment, further preventing the leakage of harmful gases. Meanwhile, the connection between the screw fixing flange and the base and the internal threaded cylindrical pin 4 is welded, so that only the mounting hole on the entire screw fixing flange is connected to the outside. Then, the mounting hole is sealed by a shaft seal, so that the screw fixing flange end is completely sealed. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the sealing flange of the isolator transmission device of this utility model; Figure 2 This is a three-dimensional schematic diagram of the sealing flange of the isolator transmission device of this utility model; Figure 3 This is a component disassembly diagram of the sealing flange of the isolator transmission device of this utility model; Figure 4 This is a schematic diagram of the gas flow direction of the sealing flange of the isolator transmission device of this utility model; Figure 5 This is a three-dimensional structural diagram of the sealing ring of the sealing flange of the isolator transmission device of this utility model.

[0014] In the diagram: 1. Filter body; 2. Cover plate; 3. Base; 31. Shaft hole; 4. Screw fixing flange; 41. Mounting hole; 42. Shaft seal; 43. Internal threaded cylindrical pin; 5. Screw; 6. Screw seat; 7. Connecting shaft; 81. First sealing ring; 82. Second sealing ring; 83. Third sealing ring; 84. Fourth sealing ring; 9. Screw support flange; 91. Guide hole. Detailed Implementation

[0015] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0016] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a device for controlling the opening and closing of the air inlet of a filter cartridge, comprising: a base 3 and an opening and closing mechanism. The base 3 is fixedly connected to the bottom end of a filter body 1, and the base 3 has a shaft hole 31 for a lead screw 5 to pass through. The opening and closing mechanism includes a cover plate 2 disposed at the top end of the filter body 1, a lead screw fixing flange 4 disposed inside the filter body 1 and fixedly connected to the base 3, a lead screw seat 6 threadedly connected to the outer wall of the lead screw 5, two connecting shafts 7 symmetrically disposed at the top end of the lead screw seat 6, the top end of the connecting shafts 7 connected to the bottom end of the cover plate 2, a first sealing ring 81 circumferentially bonded to the bottom end of the cover plate 2, the outer diameter of the cover plate 2, the base 3 and the first sealing ring 81 being larger than the inner wall diameter of the filter body 1, the bottom end of the lead screw 5 passing through the lead screw fixing flange 4 and the base 3 in sequence, and extending out of the bottom end of the base 3. The drive is connected to the actuator end of an external motor via a coupling. The top bearing of the lead screw 5 is connected to a lead screw support flange 9, which has a guide hole 91. The diameter of the guide hole 91 is matched with the diameter of the connecting shaft 7, allowing the connecting shaft 7 to fit and pass through the guide hole 91. When the lead seat 6 moves up and down, the outer wall of the connecting shaft 7 slides up and down along the inner wall of the guide hole 91. The connecting shaft 7 limits the lead seat 6 through the guide hole 91. An internal thread cylindrical pin 43 is connected between the lead screw fixing flange 4 and the lead screw support flange 9. The end of the internal thread cylindrical pin 43 connected to the lead screw fixing flange 4 is welded to reduce the number of openings on the lead screw fixing flange 4, which can prevent harmful gases from escaping from the position of the lead screw fixing flange 4. The end of the internal thread cylindrical pin 61 connected to the lead screw support flange 9 is bolted to facilitate the disassembly of the equipment.

[0017] Furthermore, such as Figure 1 and Figure 3As shown, the screw fixing flange 4 is circular in shape. To increase the sealing between the screw fixing flange 4 and the screw 5, a mounting hole 41 is provided at the top of the screw fixing flange 4 located below the bearing connection between the screw fixing flange 4 and the screw 5. A shaft seal 42 fitted onto the outer wall of the screw 5 is provided in the mounting hole 41. To increase the sealing between the screw fixing flange 4 and the base 3, the screw fixing flange 4 and the base 3 are connected by welding.

[0018] Furthermore, the shaft seal 42 adopts a flange with positioning hole assembly sealing ring of model CTLTXEEB.

[0019] Furthermore, such as Figure 1 , Figure 3 and Figure 5 As shown, a second sealing ring 82 and a third sealing ring 83 are bonded to the bottom of the filter body 1. The outer ring of the second sealing ring 82 fits against the outer ring of the filter body 1, and the diameter of the outer ring of the second sealing ring 82 is larger than the diameter of the outer wall of the filter body 1. The inner ring of the third sealing ring 83 fits against the inner ring of the filter body 1, and the diameter of the inner ring of the third sealing ring 83 is larger than the diameter of the inner wall of the filter body 1. By setting the second sealing ring 82 and the third sealing ring 83, the connection between the filter body 1 and the base 3 is sealed, so that the gas inside the filter body 1 cannot escape to the outside from the gap at the connection between the filter body 1 and the base 3.

[0020] Furthermore, a fourth sealing ring 84 is adhered to the bottom end of the base 3. The outer ring of the fourth sealing ring 84 fits against the outer ring of the base 3, and the diameter of the outer ring of the fourth sealing ring 84 is larger than the inner wall diameter of the base 3. The bottom end of the base 3 is fixedly connected to the external equipment. The fourth sealing ring 84 seals the gap between the end of the base 3 and the external equipment, further preventing gas from escaping to the outside.

[0021] Furthermore, such as Figure 1 As shown, the first sealing ring 81, the second sealing ring 82, the third sealing ring 83, and the fourth sealing ring 84 are all circular rings with a semi-circular cross-section. The side that is attached to the filter body 1 or the base 3 is a flat plane, and the other side is a semi-circular protrusion. To meet the sealing requirements of the biomedical industry, the sealing rings are made of silicone rubber.

[0022] Based on the above structure, such as Figure 1 and 5As shown, during use, the actuator of the external motor drives the lead screw 5 to rotate via a coupling. The lead screw 5 drives the lead screw seat 6 to move up and down through a threaded connection with the lead screw seat 6. The lead screw seat 6 drives the cover plate 2 and the sealing ring 81 to move up and down through the connecting shaft 7. Specifically, when the lead screw 5 rotates clockwise, the lead screw seat 6 moves towards the lead screw fixing flange 4, causing the cover plate 2 to move downwards, eventually making the cover plate 2 completely fit with the top of the filter body 1, and the filter body 1 stops air intake. When the lead screw 5 moves counterclockwise, the lead screw seat 6 moves towards the lead screw support flange 9, causing the cover plate 2 to move forward and upwards, causing the cover plate 2 to release the fit with the top of the filter body 1, and the filter body 1 starts to intake air, with air entering from the cover plate 2 and exiting from all sides of the filter body 1.

[0023] As described above, the sealing flange of the isolator transmission device of this utility model seals the gap between the filter body 1 and the base 3 by setting a second sealing ring 82 and a third sealing ring 83 at the bottom end of the filter body 1, preventing harmful gases from escaping to the outside through the gap at the connection between the filter body 1 and the base 3. At the same time, a fourth sealing ring 84 is set at the bottom end of the base 3 to seal the contact position between the base 3 and the external equipment, further preventing the leakage of harmful gases. Meanwhile, the connection between the screw fixing flange 4 and the base 3 and the internal threaded cylindrical pin 43 is welded, so that only the mounting hole 41 on the entire screw fixing flange 4 is connected to the outside. Then, the mounting hole is sealed by the shaft seal 43, so that the screw fixing flange end is completely sealed.

[0024] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A sealing flange for an isolator transmission device, comprising a base (3) and an opening and closing mechanism, wherein the base (3) is fixedly connected to the bottom end of a filter body (1), and the base (3) is provided with a shaft hole (31) for a lead screw (5) to pass through; the opening and closing mechanism comprises a cover plate (2) disposed at the top end of the filter body (1), a lead screw fixing flange (4) disposed inside the filter body (1) and fixedly connected to the base (3), and a lead screw (5) bearing connected to the lead screw fixing flange (4), wherein a lead screw seat (6) is threadedly connected to the outer wall of the lead screw (5), and two connecting shafts (7) are symmetrically disposed at the top end of the lead screw seat (6), the top end of the connecting shafts (7) is connected to the bottom end of the cover plate (2), and a first sealing ring (81) is circumferentially bonded to the bottom end of the cover plate (2), characterized in that: It also includes a second sealing ring (82) and a third sealing ring (83) disposed at the bottom of the filter body (1), and a fourth sealing ring (84) disposed at the bottom of the base (3).

2. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The outer ring of the second sealing ring (82) fits against the outer ring of the filter body (1), and the outer ring diameter of the second sealing ring (82) is larger than the outer wall diameter of the filter body (1).

3. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The inner ring of the third sealing ring (83) is fitted with the inner ring of the filter body (1), and the inner ring diameter of the third sealing ring (83) is larger than the inner wall diameter of the filter body (1).

4. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The outer ring of the fourth sealing ring (84) fits against the outer ring of the base (3), and the outer ring diameter of the fourth sealing ring (84) is larger than the outer wall diameter of the base (3).

5. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The first sealing ring (81), the second sealing ring (82), the third sealing ring (83), and the fourth sealing ring (84) are all circular rings with a semi-circular cross-section. The side that is attached to the filter body (1) or the base (3) is a flat plane, and the other side is a semi-circular protrusion.

6. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The first sealing ring (81), the second sealing ring (82), the third sealing ring (83), and the fourth sealing ring (84) are made of silicone rubber.

7. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The screw fixing flange (4) is circular in shape. The top of the screw fixing flange (4) located below the bearing connection between the screw fixing flange (4) and the screw (5) is provided with a mounting hole (41). A shaft seal (42) sleeved on the outer wall of the screw (5) is provided in the mounting hole (41). The screw fixing flange (4) and the base (3) are connected by welding.

8. The sealing flange of the isolator transmission device as described in claim 1, characterized in that: The screw fixing flange (4) and the screw support flange (9) are connected by an internal thread cylindrical pin (43). The end of the internal thread cylindrical pin (43) connected to the screw fixing flange (4) is welded, and the end of the internal thread cylindrical pin (43) connected to the screw support flange (9) is bolted.

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