CN219472896U

CN219472896U - Shaft sealing device of biological closed valve

Info

Publication number: CN219472896U
Application number: CN202320825167.6U
Authority: CN
Inventors: 沈露华; 陈路刚; 毛德宝; 袁立宝
Original assignee: Suzhou Guangke Environmental Technology Co ltd
Current assignee: Suzhou Guangke Environmental Technology Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-08-04
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a shaft sealing device of a biological sealing valve, which comprises a bearing seat, a rotating shaft and a sealing valve shell, wherein the bearing seat is provided with a plurality of bolt holes, the lower part of the bearing seat is provided with an annular groove, a 0-type sealing ring is arranged in the annular groove, the middle part of the bearing seat is sequentially provided with a first through hole, a second through hole and a third through hole along the axial direction, the edge of the second through hole is provided with a lip-shaped sealing ring, the inside of the lip-shaped sealing ring is provided with an annular spring, the edge of the third through hole is provided with a bearing, the sealing valve shell is provided with a sealing valve shell opening, the bottom of the bearing seat is provided with an annular sealing block matched with the sealing valve shell opening, and the rotating shaft sequentially penetrates through the sealing valve shell opening, the bearing, the lip-shaped sealing ring and the first through hole from the inside of the sealing valve shell to the outside of the sealing valve shell. The utility model can effectively solve the problems that the rotating shaft of the biological closed valve is difficult to rotate, is easy to be blocked and is easy to deform under the radial rebound force of the sealing gasket due to the longer rotating shaft under the large air volume ventilation environment.

Description

Shaft sealing device of biological closed valve

Technical Field

The utility model relates to the technical field of biological closed valves, in particular to a shaft sealing device of a biological closed valve.

Background

The biological sealing valve is mainly used for a ventilation system of a biological laboratory, and in order to prevent leakage of toxic and harmful substances and aerosol in the laboratory and meet the requirements of operations such as airtight sterilization and the like of the interior of the laboratory and key protective equipment, equipment for guaranteeing the air tightness of the whole system when the valve is closed through biological sealing valve equipment is needed.

The current biological safety airtight valve in the market at present is more common driving method for the rotation axis of electric actuator drive to realize the switching of valve, because electric actuator and rotation axis are connected and are installed in the valve body outside, the rotation axis must pass airtight valve box, consequently biological airtight valve need guarantee the gas tightness between rotation axis and the box in the operation in-process.

1. The common biological airtight valve usually can set up 0 type sealing washer between axle and box, because 0 type circle realizes sealing through the interference fit between axle and the valve body, because the rotation axis receives great resistance in the operation, leads to the rotation axis card to die when serious.

2. And because the installation of rotation axis and 0 type sealing washer interference fit, it is comparatively troublesome to install.

3. The 0-shaped ring is easy to lose efficacy after long-time operation, so that the biological sealing valve is leaked, and the service life is short.

4. When the large-air-volume biological sealing valve is closed, the rebound force of the sealing gasket is large in radial direction of the rotating shaft, the length of the rotating shaft of the large-air-volume biological sealing valve is long, the rotating shaft is easy to deform when being stressed radially, a tiny gap is formed between the sealing ring and the rotating shaft, leakage is easy to occur, and biological safety risks are caused.

Disclosure of Invention

The utility model aims at: the shaft sealing device of the biological sealing valve aims to solve the problems that a rotating shaft of the biological sealing valve is difficult to rotate, is easy to clamp and is easy to deform under the radial rebound force of a sealing gasket due to the fact that the rotating shaft is long under the large-air-volume ventilation environment.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a biological airtight valve's shaft seal device, including the bearing frame, rotation axis and airtight valve housing, the bearing frame is equipped with a plurality of bolt holes, the bearing frame lower part is equipped with the annular groove, be provided with 0 type sealing washer in the annular groove, the bearing frame middle part is equipped with first through-hole, second through-hole and third through-hole, first through-hole, second through-hole and third through-hole are arranged in proper order along the axis direction, the second through-hole edge is equipped with the lip seal circle, the inside annular spring that is equipped with of lip seal circle, the third through-hole edge is equipped with the bearing, airtight valve housing is equipped with airtight valve housing opening, the bearing frame bottom is equipped with the annular sealing piece that matches with airtight valve housing opening, the rotation axis runs through airtight valve housing opening in proper order by airtight valve housing inside, the bearing, lip seal circle and first through-hole extend to airtight valve housing outside.

As a further description of the above technical solution:

the top of the bearing seat is provided with a boss.

As a further description of the above technical solution:

the bearing seat is fixed on the airtight valve housing through a plurality of bearing seat fixing bolts.

As a further description of the above technical solution:

the diameters of the first through hole, the second through hole and the third through hole are sequentially increased.

As a further description of the above technical solution:

the outer diameter of the lip-shaped sealing ring is smaller than that of the bearing, and the inner diameters of the lip-shaped sealing ring and the bearing are equal.

In summary, due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. the lip-shaped sealing ring of the rotating shaft is arranged in the bearing seat of the rotating shaft and moves relative to the rotating shaft, the lip-shaped sealing ring is internally provided with an annular spring, and the annular spring applies radial pretightening force to the sealing lip, so that the air tightness of the rotating shaft in the running process is ensured, and the rotating operation is smooth.

2. The lip-shaped sealing ring and the bearing are arranged in the bearing seat, and the design mode is convenient for installation.

3. The lip-shaped sealing ring is arranged inside the bearing seat, the bearing seat body at the upper side of the sealing ring is in clearance fit with the rotating shaft, and the bearing clearance fit is used at the lower side of the sealing ring, so that when the rotating shaft is deformed under radial stress, the upper side of the sealing ring is limited to the rotating shaft through the bearing seat body, and the lower side of the sealing ring is limited to the rotating shaft through the bearing, so that the rotating shaft at the sealing ring is ensured not to deform, and the air tightness is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front cross-sectional view of a shaft seal of a bio-valve.

Fig. 2 is a schematic structural view of a bearing housing in a shaft sealing device of a bio-seal valve.

Fig. 3 is a top view of a bearing housing in a shaft seal arrangement of a bio-valve.

FIG. 4 is a C-C cross-sectional view of a bearing housing in a shaft seal assembly of a bio-valve.

Legend description:

1. a bearing seat; 2. a rotation shaft; 3. a closed valve housing; 4. a boss; 5. bolt holes; 6. a bearing seat fixing bolt; 7. an annular groove; 8. a 0-type seal ring; 9. a first through hole; 10. a second through hole; 11. a third through hole; 12. a lip seal; 13. an annular spring; 14. a bearing; 15. closing the valve housing opening; 16. an annular sealing block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Embodiment one:

referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a biological airtight valve's shaft seal device, including bearing frame 1, rotation axis 2 and airtight valve housing 3, bearing frame 1 is equipped with a plurality of bolt holes 5, bearing frame 1 lower part is equipped with annular groove 7, be provided with 0 type sealing washer 8 in the annular groove 7, bearing frame 1 middle part is equipped with first through-hole 9, second through-hole 10 and third through-hole 11, first through-hole 9, second through-hole 10 and third through-hole 11 arrange along the axis direction in proper order, second through-hole 10 edge is equipped with lip seal circle 12, lip seal circle 12 inside is equipped with annular spring 13, third through-hole 11 edge is equipped with bearing 14, airtight valve housing 3 is equipped with airtight valve housing opening 15, bearing frame 1 bottom is equipped with the annular sealing piece 16 with airtight valve housing opening 15 in proper order, rotation axis 2 runs through airtight valve housing opening 15 in proper order from airtight valve housing 3 inside, bearing 14, lip seal circle 12 and first through-hole 9 extend to airtight valve housing 3 outside, this shaft seal device can effectively solve under big amount of wind the circumstances rotation axis 2 of biological airtight valve rotatory difficulty, easy dead problem, reduce sealing device's radial pressure to rotation axis 2, rotation axis 2 is avoided rotation axis 2 to take place to warp and is blocked.

Embodiment two:

on the basis of the first embodiment, preferably, the top of the bearing seat 1 is provided with a boss 4, and the bearing seat 1 is fixed on the closed valve housing 3 by a plurality of bearing seat fixing bolts 6, so that the bearing seat 2 is more tightly connected with the closed valve housing 3.

Embodiment III:

on the basis of the first embodiment, it is preferable that the diameters of the first through hole 9, the second through hole 10 and the third through hole 11 are sequentially increased, so that the auxiliary member is conveniently added to assist in fixing the rotation shaft 2.

Embodiment four:

on the basis of the first embodiment, preferably, the outer diameter of the lip seal ring 12 is smaller than the outer diameter of the bearing 14, and the inner diameters of the lip seal ring 12 and the bearing 14 are equal, so that the air tightness between the lip seal ring 12 and the bearing 14 and the through hole and the rotating shaft 2 is better.

In summary, due to the adoption of the technical scheme, the shaft sealing device of the biological sealing valve has the following beneficial effects compared with the prior art:

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a biological airtight valve's shaft seal device, its characterized in that, including bearing frame (1), rotation axis (2) and airtight valve housing (3), bearing frame (1) is equipped with a plurality of bolt holes (5), bearing frame (1) lower part is equipped with annular groove (7), be provided with 0 type sealing washer (8) in annular groove (7), bearing frame (1) middle part is equipped with first through-hole (9), second through-hole (10) and third through-hole (11), first through-hole (9), second through-hole (10) and third through-hole (11) are arranged in proper order along the axis direction, second through-hole (10) edge is equipped with lip seal ring (12), lip seal ring (12) inside is equipped with annular spring (13), third through-hole (11) edge is equipped with bearing (14), airtight valve housing (3) are equipped with airtight valve housing opening (15), bearing frame (1) bottom be equipped with airtight valve housing opening (15) supporting annular sealing piece (16), rotation axis (2) are by airtight valve housing (3) inside runs through airtight valve housing opening (15) in proper order The lip seal (12) and the first through hole (9) extend outside the sealing valve housing (3).

2. Shaft sealing device of a bio-valve according to claim 1, characterized in that the top of the bearing housing (1) is provided with a boss (4).

3. Shaft sealing device for a bio-valve according to claim 1, characterized in that the bearing housing (1) is fixed to the sealing valve housing (3) by means of a plurality of bearing housing fixing bolts (6).

4. Shaft sealing device of a bio-valve according to claim 1, characterized in that the diameters of the first through hole (9), the second through hole (10) and the third through hole (11) increase in sequence.

5. The shaft sealing device of a bio-valve according to claim 1, wherein the outer diameter of the lip seal (12) is smaller than the outer diameter of the bearing (14), the inner diameters of the lip seal (12) and the bearing (14) being equal.