Closed window used in negative pressure environment of biosafety laboratory

Abstract

The utility model relates to a closed window used in a negative pressure environment of a biosafety laboratory in the technical field of biosafety laboratories. The closed window comprises an aluminum profile, a first layer of glass and a second layer of glass, each edge of the aluminum profile is provided with a first inclined surface bonded with the first layer of glass and a second inclined surface bonded with the second layer of glass; a first sealant and a second sealant are arranged between the first layer of glass and the first inclined plane and between the second layer of glass and the second inclined plane; and a buffer substance is filled between the first inclined surface and the second inclined surface. The utility model relates to a novel structure of a biological safety airtight window of a P3 laboratory, and the sealing performance, the heat insulation performance and the safety protection performance of the biological safety airtight window are greatly improved. And the safety of experiments and production can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of biosafety laboratories, in particular to a sealed window used in a negative pressure environment of a biosafety laboratory. Background Art

[0002] According to GB19489-2008, General Requirements for Laboratory Biosafety, the airtightness of the laboratory containment area enclosure must meet the following requirements: When all access to the room under test is closed and the room temperature is maintained at the upper limit of the design range, the air pressure in the room must naturally decay to less than 250 Pa within 20 minutes after rising to 500 Pa. Under normal operating conditions, the pressure difference (negative pressure) between the laboratory's core workroom and the outdoor atmospheric pressure should be no less than 40 Pa, and the pressure difference (negative pressure) with adjacent areas should be no less than 15 Pa. Therefore, the sealed windows within the laboratory's core area require special sealing and protection requirements. Currently, most laboratories use the following method: manually clean color-coated steel plates combined with aluminum profiles for observation windows; or mechanically clean color-coated steel plates with holes sealed to the observation windows using adhesive. The observation window glass is often bonded to insulating glass (glass + spacer + glass). Both methods have certain drawbacks: First, the overall airtightness is insufficient, making it difficult to meet the airtightness requirements of P3 biosafety laboratories. Second, the level of protection provided by the sealed windows is insufficient, with most currently using double-layer 5mm glass, which lacks overall strength. Third, there is no rational design for negative pressure laboratory conditions, and conventional observation windows are used. Utility Model Content

[0003] In order to solve the above problems, the present invention discloses a sealed window for use in a negative pressure environment of a biosafety laboratory. The technical solution of the present invention is implemented as follows:

[0004] A sealed window for use in a negative pressure environment of a biosafety laboratory, comprising an aluminum profile, a first layer of glass, and a second layer of glass;

[0005] Each edge of the aluminum profile is provided with a first inclined surface for bonding with the first layer of glass and a second inclined surface for bonding with the second layer of glass;

[0006] A first sealant and a second sealant are provided between the first layer of glass and the first inclined surface, and between the second layer of glass and the second inclined surface;

[0007] A buffer material is filled between the first inclined surface and the second inclined surface.

[0008] Preferably, the inclination angle of the first inclined surface and the second inclined surface is 45°.

[0009] Preferably, the first sealant is butyl sealant.

[0010] Preferably, the second sealant is silicone sealant.

[0011] Preferably, the first layer of glass and the second layer of glass are both tempered glass.

[0012] Preferably, the thickness of the tempered glass is 10 mm.

[0013] Preferably, the four corners of the tempered glass are all provided with 8mm chamfers.

[0014] Preferably, the buffer substance is foamed silica gel.

[0015] Preferably, 3A molecular sieve is provided in the foamed silica gel.

[0016] The advantages of this utility model are as follows:

[0017] 1. The double-layer 10mm tempered glass + aluminum alloy frame structure is firm and reliable.

[0018] 2. Chamfered tempered glass: When the glass is damaged by external force, the fragments will become small blunt-angled particles similar to honeycomb, which are impact-resistant and shatter-proof.

[0019] 3. In the laboratory environment with pressure difference (negative pressure), the slope design of the aluminum alloy window frame is combined with the chamfered tempered glass to form a force from the high-pressure side to the low-pressure side in the adjacent areas.

[0020] 4. Use butyl rubber (first sealant) and silicone rubber (second sealant) for two sealing processes.

[0021] 5. Using foamed silicone as the lining buffer material can greatly improve the sound insulation performance of the closed window. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 or the description of the prior art. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0024] Figure 1It is a front view of an embodiment of a sealed window used in a negative pressure environment of a biosafety laboratory;

[0025] Figure 2 A side cutaway diagram of an embodiment of a sealed window for use in a negative pressure environment of a biosafety laboratory;

[0026] Figure 3 A bottom-view cross-sectional view of an embodiment of a sealed window for use in a negative pressure environment of a biosafety laboratory;

[0027] Figure 4 This is an enlarged view of the structure of the aluminum profile used for bonding with the glass in an embodiment of a sealed window used in a negative pressure environment of a biosafety laboratory;

[0028] Figure 5 for Figure 3 Enlarged view of B in ;

[0029] Figure 6 for Figure 3 Magnified cross-sectional view of A in FIG.

[0030] In the above drawings, the figure numbers represent:

[0031] 1. Aluminum profile;

[0032] 1-1, first slope;

[0033] 1-2, second slope;

[0034] 2. First layer of glass;

[0035] 3. Second layer of glass;

[0036] 4. First sealant;

[0037] 5. Second sealant;

[0038] 6. Buffer substances. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions 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.

[0040] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specific implementation methods are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the description and claims of the present invention and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the specific embodiments of this utility model, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly indicate the number, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0042] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this disclosure may be combined with other embodiments.

[0043] In the description of the embodiments of the present invention, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the related objects are in an "or" relationship.

[0044] Throughout this disclosure, numerical values ​​represent approximate measures or limits of ranges to encompass minor deviations from a given value, as well as embodiments having approximately the stated value and embodiments having the exact value stated. Except for the working examples provided at the end of the detailed description, all numerical values ​​for parameters (e.g., amounts, or conditions) in this specification (including the appended claims) should be understood as being modified in all instances by the term "about," regardless of whether "about" actually appears before the numerical value. "About" indicates that the stated numerical value allows for some minor imprecision (somewhat close to the exact value of the stated value; approximately or reasonably close to the stated value; nearly). If the imprecision provided by "about" is not otherwise understood in this ordinary sense in the art, "about," as used herein, at least indicates the variation that can occur due to ordinary methods of measuring and using such parameters. For example, "about" may encompass variations of less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5%, and in certain aspects, optionally less than or equal to 0.1%.

[0045] Additionally, disclosure of ranges includes disclosure of all values ​​within the entire range and further divided ranges, including endpoints and sub-ranges stated for such ranges.

[0046] The following examples will be used to more specifically describe the embodiments of the present invention. It should be noted that the embodiments of the present invention are not limited to these examples.

[0047] Example

[0048] In a specific embodiment, Figure 1-6 As shown, a sealed window for use in a negative pressure environment of a biosafety laboratory comprises an aluminum profile 1, a first layer of glass 2 and a second layer of glass 3; each edge of the aluminum profile 1 is provided with a first inclined surface 1-1 for bonding to the first layer of glass 2 and a second inclined surface 1-2 for bonding to the second layer of glass 3; a first sealant 4 is provided between the first layer of glass 2 and the first inclined surface 1-1, and between the second layer of glass 3 and the second inclined surface 1-2 for sealing; in addition, two triangular gaps are formed between the head and tail ends of the first inclined surface 1-1 and the first layer of glass 2, and a triangular gap is formed between the tail end of the second inclined surface 1-2 and the second layer of glass 3; the above three triangular gaps are all filled with a second sealant 5; a buffer substance 6 is filled between the first inclined surface 1-1 and the second inclined surface 1-2.

[0049] In this embodiment, the inclination angle of the first inclined surface 1 - 1 and the second inclined surface 1 - 2 is 45°.

[0050] In this embodiment, the first sealant 4 is butyl sealant.

[0051] In this embodiment, the second sealant 5 is silicone sealant.

[0052] In this embodiment, the first layer of glass 2 and the second layer of glass 3 are both tempered glass.

[0053] In this embodiment, the thickness of the tempered glass is 10 mm, and the four corners of the tempered glass are all provided with 8 mm chamfers.

[0054] In this embodiment, the buffer material 6 is foamed silica gel.

[0055] This embodiment utilizes an aluminum profile structure with two 45-degree slopes, front and back, for mounting and sealing tempered glass. The front glass mounting surface is smaller than the rear glass mounting surface. This design allows for the installation of the first (smaller) layer of glass 2 during the entire aluminum alloy profile welding process, followed by the sealing of the second (larger) layer of glass 3.

[0056] In this embodiment, the first layer of glass 2 serves as the negative pressure side, and the second layer of glass 3 serves as the positive pressure side.

[0057] This embodiment uses 10mm thick tempered glass with 8mm chamfers on all four sides. This is done to increase the effective lateral contact area between the glass and the frame when the glass on the positive pressure side acts on the frame. Furthermore, the initial seal (butyl rubber) between the tempered glass and the aluminum alloy frame is formed at a 45-degree first bevel 1-1, ensuring a tighter fit between the glass and the aluminum alloy frame.

[0058] In this embodiment, there are two sealing processes. The first sealing process uses butyl rubber for internal sealing, and the second sealing process uses silicone rubber for external sealing of the glass. Figure 6 shown.

[0059] Butyl rubber offers excellent airtightness, chemical stability, and thermal stability. It effectively blocks water vapor penetration, which is crucial for maintaining the transparency and longevity of glass. Its aging and chemical resistance ensures the stability of glass in various environments. Furthermore, the use of butyl rubber can reduce water vapor transmission, further extending the service life of glass.

[0060] Silicone adhesive offers high bond strength, UV resistance, excellent high and low temperature resistance, and weather resistance, while also providing structural reinforcement. Silicone adhesive is highly compatible with the sealant used to caulk curtain wall panels, ensuring the structural safety of glass. Its extremely low water absorption makes it suitable for glass exposed to long-term environmental conditions. As a secondary sealant, silicone adhesive primarily provides structural reinforcement.

[0061] In this embodiment, the inner lining of the biosafety sealing valve is made of silica gel and filled with 3A molecular sieve to absorb internal moisture and perform a drying function.

[0062] This embodiment is a new structure for a P3 laboratory biosafety enclosure window, which significantly improves the sealing, thermal insulation, and safety protection performance of the biosafety enclosure window, helping to ensure the safety of experiments and production.

[0063] The specific parameters of this embodiment are as follows:

[0064] Aluminum profile 1: The longitudinal beam is 1199.5 mm long, the transverse beam is 799.5 mm long, and the width is 50 mm. The length of the housing for installing the first layer of glass 2 is 30 mm, and the length of the housing for installing the second layer of glass 3 is 8 mm.

[0065] First layer of glass 2: length 1151.5 mm, width 751.5 mm.

[0066] Second layer of glass 3: length 1179.5mm, width 779.5mm.

[0067] It should be pointed out that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealed window for use in a negative pressure environment of a biosafety laboratory, characterized in that: Includes aluminum profiles, first and second glazing; Each edge of the aluminum profile is provided with a first inclined surface for bonding with the first layer of glass and a second inclined surface for bonding with the second layer of glass; A first sealant and a second sealant are provided between the first layer of glass and the first inclined surface, and between the second layer of glass and the second inclined surface; A buffer material is filled between the first inclined surface and the second inclined surface.

2. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 1, characterized in that: The inclination angle of the first inclined surface and the second inclined surface is 45°.

3. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 1, characterized in that: The first sealant is butyl rubber.

4. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 1, characterized in that: The second sealant is silicone sealant.

5. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 1, characterized in that: The first layer of glass and the second layer of glass are both tempered glass.

6. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 5, characterized in that: The thickness of the tempered glass is 10 mm.

7. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 5, characterized in that: The four corners of the tempered glass are all provided with 8mm chamfers.

8. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 1, characterized in that: The buffer material is foamed silica gel.

9. The sealed window for use in a negative pressure environment of a biosafety laboratory according to claim 8, characterized in that: 3A molecular sieve is arranged in the foamed silica gel.

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