Inflatable sealing rubber strip, door body and biosafety laboratory

Abstract

The utility model discloses an inflatable sealing rubber strip, a door body and a biological safety laboratory. The inflatable sealing rubber strip comprises an annular air bag and an inflation nozzle, the annular air bag comprises an inner ring face and an outer ring face, the outer ring face comprises a bendable arc face and a sealing protrusion arranged in the center of the outer surface of the arc face, and the two sides of the arc face are connected with the two sides of the inner ring face respectively so that an annular hollow air cavity can be formed between the inner ring face and the outer ring face. The inflation nozzle is connected with the annular air bag. The inflatable sealing rubber strip is mainly applied and installed on a door body, the outer ring face is of a structure with the cambered surface and the sealing protrusions, the deformation stroke can be increased to meet the requirement for a gap between the door body and a door frame, meanwhile, the cambered surface is small in radian, small in deformation after inflation, small in generated bending and small in stress concentration, the service life of the inflatable sealing rubber strip is prolonged, and the service life of the inflatable sealing rubber strip is prolonged. The problems that an existing inflatable sealing rubber strip is poor in abrasion resistance and prone to cracking after being repeatedly used can be solved. The door body comprises the inflatable sealing rubber strip. The biosafety laboratory comprises the door body.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to an inflatable sealing strip, a door body and a biosafety laboratory. Background Art

[0002] Sealing strips are key components of airtight protective equipment and facilities in high-level biosafety laboratories. They are widely used in cabin gaps, airtight doors, airtight transfer windows, isolators, and more. Damage, deformation, or aging of these strips can easily lead to leaks or failure. In mild cases, this can cause the equipment and facilities to fail to meet sealing requirements. In severe cases, it can alter the laboratory's controlled environment and even endanger personnel safety. Therefore, as a crucial measure to ensure airtightness, the structural design of the sealing material is particularly important.

[0003] Currently, high-level biosafety laboratories use inflatable sealing strips on their doors. Existing inflatable sealing strips have poor wear resistance and are prone to cracking after repeated use, posing significant risks to the durability and effectiveness of laboratory seals. Therefore, it is necessary to propose a new inflatable sealing strip design to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of inflatable sealing strip, door body and biosafety laboratory, so as to solve the problem that the inflatable sealing strip provided on the door body of the above-mentioned existing biosafety laboratory has poor wear resistance and is easy to crack after repeated use, thereby causing great risks to the durability and effectiveness of the laboratory seal.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides an inflatable sealing strip, comprising:

[0007] An annular airbag, the annular airbag comprising an inner annular surface and an outer annular surface, the outer annular surface comprising a bendable arcuate surface and a sealing protrusion disposed at the center of the outer surface of the arcuate surface, the two sides of the arcuate surface being respectively connected to the two sides of the inner annular surface to form an annular hollow air cavity between the inner annular surface and the outer annular surface;

[0008] An inflation nozzle is connected to the annular airbag and can inflate air into the hollow air cavity to push the arc surface and the sealing protrusion outward from the annular airbag.

[0009] Preferably, the outer end surface of the sealing protrusion is a plane.

[0010] Preferably, the inner annular surface includes a bottom surface and side surfaces respectively connected to both sides of the bottom surface, and both sides of the arc surface are respectively connected to the two side surfaces.

[0011] Preferably, the outer surfaces of the two side surfaces are respectively provided with anti-slip ridges.

[0012] Preferably, the anti-slip ridge is a triangular ridge with the tip facing the outside of the side surface, and the triangular ridge is arranged on the side surface close to the bottom surface.

[0013] Preferably, the anti-slip ridge, the inner annular surface, the arc surface and the sealing protrusion are integrally formed.

[0014] Preferably, the inner annular surface and the arc surface have the same thickness, and the thickness is 1 mm to 4 mm.

[0015] Preferably, the inflation pressure of the annular airbag ranges from 0.2 MPa to 0.5 MPa.

[0016] The present invention also proposes a door body, the outer periphery of which is provided with a strip installation groove, in which the inflatable sealing strip described above is arranged, and the sealing protrusion of the inflatable sealing strip faces the outer periphery of the door body.

[0017] The present invention also provides a biosafety laboratory, comprising a door frame and the door body as described above, wherein the door body is adapted to be installed in the door frame.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model discloses an inflatable sealing strip, comprising an annular airbag and an inflation nozzle, wherein the annular airbag comprises an inner annular surface and an outer annular surface, wherein the outer annular surface comprises a bendable arc surface and a sealing protrusion arranged at the center of the outer surface of the arc surface, and the two sides of the arc surface are respectively connected to the two sides of the inner annular surface, so that an annular hollow air cavity is formed between the inner annular surface and the outer annular surface; the inflation nozzle is connected to the annular airbag. The above-mentioned inflatable sealing strip is mainly used for installation on a door body, and the outer annular surface adopts a structure of an arc surface plus a sealing protrusion, which can increase the deformation stroke to meet the gap between the door body and the door frame. At the same time, the curvature of the arc surface is small, the deformation amount after inflation is small, the bending is small, and the stress concentration is small, which is conducive to improving the service life of the inflatable sealing strip and can solve the problems of poor wear resistance and easy cracking after repeated use of the existing inflatable sealing strip.

[0020] The door body and biosafety laboratory proposed in the present invention both adopt the above-mentioned inflatable sealing strips. The inflatable sealing strips have a long service life. The outer ring surface adopts a structure of an arc surface and a sealing protrusion, which can increase the deformation stroke to meet the gap between the door body and the door frame. At the same time, the curvature of the arc surface is small, the deformation after inflation is small, the bending is small, and the stress concentration is small, which can solve the problems of poor wear resistance and easy cracking of the existing inflatable sealing strips after repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is an overall schematic diagram of the inflatable sealing strip disclosed in an embodiment of the present utility model;

[0023] Figure 2 A partial schematic diagram of the inflatable sealing strip disclosed in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic cross-sectional view of the inflatable sealing strip disclosed in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the inflatable sealing strip in a non-working state disclosed in an embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the working state of the inflatable sealing strip disclosed in an embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the door structure disclosed in an embodiment of the present utility model;

[0028] Figure 7 This is a structural schematic diagram of the rubber strip installation groove on the door body disclosed in an embodiment of the present utility model.

[0029] In the figure: 100, inflatable sealing strip; 200, door body; 201, strip installation groove; 300, door frame;

[0030] 1. Annular airbag; 2. Inner ring surface; 21. Bottom surface; 22. Side surface; 3. Arc surface; 4. Sealing protrusion; 5. Hollow air cavity; 6. Inflating nozzle; 7. Flat surface; 8. Highest point; 9. Anti-slip ridge. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The purpose of the utility model is to provide a new type of inflatable sealing strip, door body and biosafety laboratory, so as to solve the problem that the inflatable sealing strip provided on the door body of the existing biosafety laboratory has poor wear resistance and is easy to crack after repeated use, thereby causing great risks to the durability and effectiveness of the laboratory seal.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Example 1

[0035] like Figures 1 to 5 As shown, this embodiment proposes an inflatable sealing strip 100, including an annular airbag 1 and an inflation nozzle 6, the annular airbag 1 includes an inner annular surface 2 and an outer annular surface, the outer annular surface includes a bendable arc surface 3 and a sealing protrusion 4 arranged at the center of the outer surface of the arc surface 3, the two sides of the arc surface 3 are respectively connected to the two sides of the inner annular surface 2, so that an annular hollow air cavity 5 is formed between the inner annular surface 2 and the outer annular surface; the inflation nozzle 6 is connected to the annular airbag 1, and the inflation nozzle 6 can inflate the hollow air cavity 5 to push the arc surface 3 and the sealing protrusion 4 to the outside of the annular airbag 1, so that the sealing protrusion 4 and the corresponding sealing member achieve contact sealing. The above-mentioned inflatable sealing strip 100 is mainly used and installed on the door body. The outer ring surface adopts the structure of arc surface 3 plus sealing protrusion 4, which can increase the deformation stroke to meet the gap between the door body and the door frame. At the same time, the curvature of the arc surface 3 is preferably π, that is, the arc shape of the arc surface 3 is semicircular. After inflation, the deformation is small, the bending is small, and the stress concentration is small, which is beneficial to improve the service life of the inflatable sealing strip 100 and can solve the problems of poor wear resistance and easy cracking of the existing inflatable sealing strips after repeated use.

[0036] In this embodiment, the outer end surface of the sealing protrusion 4 is preferably a plane 7. The plane structure can increase the contact area between the sealing protrusion 4 and the corresponding sealing member, thereby improving the sealing performance. Specifically, the plane 7 can be circular or polygonal (such as rectangular, regular hexagonal, etc.).

[0037] In this embodiment, the inner annular surface 2 includes a bottom surface 21 and side surfaces 22 respectively connected to both sides of the bottom surface 21 , and both sides of the arc surface 3 are respectively connected to the two side surfaces 22 .

[0038] In this embodiment, the outer surfaces of both side surfaces 22 are provided with anti-slip ridges 9. These anti-slip ridges 9 are preferably triangular ridges with their tips pointing outward from the side surfaces 22. These ridges are located near the bottom surface 21 of the side surfaces 22. It should be noted that the triangular ridges are generally annular ridges arranged along the annular shape of the annular airbag 1. As a preferred embodiment, each side surface 22 is provided with multiple triangular ridges near the bottom surface 21.

[0039] In this embodiment, the anti-slip ridge 9, the inner ring surface 2, the arc surface 3 and the sealing protrusion 4 are preferably formed integrally of rubber material. Figures 3 to 5 As shown, the shape structure of any cross section of the annular airbag 1 is hollow, and the two side surfaces 22 are parallel and symmetrically arranged on both sides of the bottom surface 21. In the natural state, the two side surfaces 22 are as shown in FIG. Figure 3 and Figure 4 The arc surface 3 is perpendicular to the bottom surface 21; accordingly, the arc surface 3 is a symmetrical structure with the symmetry axis of the two side surfaces 22 as the center line, and this center line is the central axis of the sealing protrusion 4. Preferably, the thickness of the inner ring surface 2 and the arc surface 3 is uniform and the same, and the thickness is 1mm to 4mm.

[0040] Further, if Figure 3 and Figure 4 The figures shown are schematic diagrams of the annular airbag 1 in a non-working state. At this time, when the arc surface 3 is completely recessed in the hollow air cavity 5, the edges on both sides of the arc surface 3 are bent and convex. At this time, the preferred plane 7 is flush with the highest point 8 on the outer surface of the edges on both sides of the arc surface 3. This design can further ensure that the deformation stroke of the outer annular surface meets the gap between the door body and the door frame.

[0041] As a preferred embodiment, the annular airbag 1 of this embodiment is preferably made of methyl vinyl silicone rubber. The preferred material hardness range is 60 to 70 Shore A, the material tensile strength range is 3.0 MPa to 8.0 MPa, and the material elongation at break ranges from 300% to 500%. Material performance degradation at -20°C is ≤10%. After UV and ozone aging tests, the surface of the annular airbag 1 shows no noticeable yellowing or cracking.

[0042] The following takes the installation of the inflatable sealing strip 100 in the strip installation groove 201 of the door body 200 as an example to illustrate the use principle of the inflatable sealing strip 100.

[0043] When the door body 200 is closed and needs to be sealed, compressed air of a certain pressure is filled into the hollow air cavity 5 of the annular airbag 1 from an external air source through the inflation nozzle 6. The compressed air applies pressure to the hollow air cavity 5, causing the annular airbag 1 to expand in all directions under pressure. Among them, the arc surface 3 of the outer ring surface switches from a concave state to a convex state and extends outward. The height of the sealing protrusion 4 in the middle of the arc surface 3 increases, so that the plane 7 of the sealing protrusion 4 directly contacts and seals the door frame 300. The inflatable sealing strip 100, based on the excellent elasticity of the rubber material, fills all gaps between the strip installation groove 201 and the door frame 300 (at this time, the two side surfaces 22 and the bottom surface 21 are in contact with the groove on three sides), thereby achieving a seal between the door body 200 and the door frame 300.

[0044] Among them, the anti-slip ridge 9 at the bottom of the side 22 can further increase the friction between the inflatable sealing strip 100 and the inner wall of the strip installation groove 201, preventing the inflatable sealing strip 100 from sliding out of the door body groove during inflation and retraction.

[0045] The specific dimensions of the inflatable sealing strip 100, such as its wall thickness, width, height, and the width of the sealing protrusion on the outer annular surface, can be designed based on the actual dimensions of the strip mounting groove 201. Specifically, the width of the annular airbag 1 (i.e., the distance between the outer surfaces of the two side surfaces 22) generally ranges from 10 mm to 30 mm, the height (i.e., the protruding direction of the sealing protrusion 4, which generally refers to the height of the annular airbag 1 when the arc surface 3 is in a convex state, and is the distance between the end surface of the sealing protrusion 4 and the outer surface of the bottom surface 21) generally ranges from 10 mm to 30 mm, and the width of the sealing protrusion 4 (this width direction is consistent with the width dimension of the annular airbag 1) generally ranges from 4 mm to 17 mm.

[0046] In this embodiment, the inflation pressure of the inflatable sealing strip 100 in the working state is preferably in the range of 0.2 MPa to 0.5 MPa, and the normal operating temperature range is -50°C to 250°C.

[0047] When the door body 200 needs to be opened again, the inflatable sealing strip 100 can be exhausted through the inflation nozzle 6, and the elastic force of the high-performance rubber material is used to restore the original shape, and the arc surface 3 of the inflatable sealing strip 100 is completely concave in the hollow air cavity 5.

[0048] Example 2

[0049] like Figures 4 to 7 As shown, this embodiment provides a door body 200, the outer periphery of which is provided with a strip installation groove 201. The inflatable sealing strip 100 disclosed in Example 1 is installed in the strip installation groove 201, and the sealing protrusion 4 of the inflatable sealing strip 100 is arranged toward the outer periphery of the door body 200. The inflation nozzle 6 is generally provided on the side surface 22 of the inflatable sealing strip 100. When installed on the door body 200, the inflation nozzle 6 is connected to the external compressed air through the hole on the side wall of the strip installation groove 201.

[0050] The door body 200 is generally installed in an adapted door frame. When the door body 200 is closed and needs to be sealed, air is inflated into the annular airbag 1 through the inflation nozzle 6, and the arc surface 3 and the sealing protrusion 4 can be pushed outward from the annular airbag 1, thereby achieving contact and sealing between the sealing protrusion 4 and the door frame.

[0051] In this embodiment, the door 200 may be a door of a sealed device in a high-level biosafety laboratory, such as a gate. The inflatable sealing strip 100 is configured on the door of a sealed device in a high-level biosafety laboratory to effectively prevent contaminants and gas leakage from the laboratory during operation.

[0052] Example 3

[0053] This embodiment provides a biosafety laboratory, comprising a door frame 300 and the door body 200 disclosed in Example 2, wherein the door body 200 is adapted to be installed within the door frame 300. The inflatable sealing strip 100 is configured on the door body of the sealing device in the biosafety laboratory, effectively preventing contaminants and gas leakage within the laboratory during operation.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An inflatable sealing strip, characterized in that: include: An annular airbag, the annular airbag comprising an inner annular surface and an outer annular surface, the outer annular surface comprising a bendable arcuate surface and a sealing protrusion disposed at the center of the outer surface of the arcuate surface, the two sides of the arcuate surface being respectively connected to the two sides of the inner annular surface to form an annular hollow air cavity between the inner annular surface and the outer annular surface; An inflation nozzle is connected to the annular airbag and can inflate air into the hollow air cavity to push the arc surface and the sealing protrusion outward from the annular airbag.

2. The inflatable sealing strip according to claim 1, characterized in that: The outer end surface of the sealing protrusion is a plane.

3. The inflatable sealing strip according to claim 1 or 2, characterized in that: The inner annular surface includes a bottom surface and side surfaces respectively connected to both sides of the bottom surface, and both sides of the arc surface are respectively connected to the two side surfaces.

4. The inflatable sealing strip according to claim 3, characterized in that: The outer surfaces of the two side surfaces are respectively provided with anti-slip ridges.

5. The inflatable sealing strip according to claim 4, characterized in that: The anti-slip ridge is a triangular ridge with a tip facing the outside of the side surface, and the triangular ridge is arranged at a position of the side surface close to the bottom surface.

6. The inflatable sealing strip according to claim 4, characterized in that: The anti-slip ridge, the inner annular surface, the arc surface and the sealing protrusion are integrally formed.

7. The inflatable sealing strip according to claim 6, characterized in that: The inner annular surface and the arc surface have the same thickness, and the thickness is 1 mm to 4 mm.

8. The inflatable sealing strip according to claim 7, characterized in that: The inflation pressure range of the annular airbag is 0.2MPa to 0.5MPa.

9. A door body, characterized in that: The outer periphery of the door body is provided with a strip installation groove, in which the inflatable sealing strip according to any one of claims 1 to 8 is provided, and the sealing protrusion of the inflatable sealing strip faces the outer periphery of the door body.

10. A biosafety laboratory, characterized in that: It comprises a door frame and the door body as claimed in claim 9, wherein the door body is adapted to be installed in the door frame.

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