Fire resistant viewing window for clean rooms

Abstract

The utility model discloses a fire prevention observation window for clean room, including metal frame system and glass subassembly, be provided with heat conduction isolation system between metal frame system and glass subassembly, heat conduction isolation system is configured as: (a) for blocking the heat transfer path of metal frame to glass subassembly, (b) for allowing the non -fireproof layer in glass subassembly to fail to fall off under the high temperature of fire, (c) for maintaining the structural integrity of fireproof layer to satisfy the fire time limit requirement, the utility model discloses a fire prevention observation window for clean room, has the advantages that when the high airtightness of clean room observation window, easy cleaning, not dust etc. are possessed, still have the advantage that can guarantee structural integrity under the sustained high temperature when the fire occurs.

Description

Technical Field

[0001] This utility model relates to the field of cleanroom facilities technology, specifically to a fireproof observation window for cleanrooms. Background Technology

[0002] Cleanroom observation windows must meet requirements such as high airtightness (ISO 1-9), smooth and easy-to-clean surface, and resistance to chemical corrosion. Traditional structures use tempered glass and metal frames fixed with adhesives (such as silicone sealing strips or structural adhesives).

[0003] Existing technological shortcomings:

[0004] Under high temperatures (>300℃) during a fire, the adhesive layer fails, causing the glass to detach.

[0005] Tempered glass softens and cracks when exposed to high temperatures, causing structural collapse;

[0006] Design of a collaborative failure mechanism between fire-resistant and non-fire-resistant layers. Utility Model Content

[0007] The purpose of this invention is to provide a fireproof observation window for clean rooms, in order to solve the problem of high-temperature failure of traditional observation windows.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A fireproof observation window for a cleanroom includes a metal frame system and a glass assembly, wherein a heat conduction insulation system is provided between the metal frame system and the glass assembly;

[0010] The heat conduction isolation system is configured as follows:

[0011] (a) Used to block the heat transfer path from the metal frame to the glass assembly;

[0012] (b) To allow non-fire-resistant layers in glass assemblies to preferentially fail and detach at high fire temperatures;

[0013] (c) Used to maintain the structural integrity of the fireproof layer to meet the fire protection time limit requirements.

[0014] In some embodiments, the heat conduction isolation system includes an inorganic heat insulation pad and a flexible fire-resistant sealing strip;

[0015] The inorganic heat insulation pad is located between the upper and lower edges of the glass assembly and the metal frame system;

[0016] The flexible fire-resistant sealing strip is located between the two sides of the glass assembly and the metal frame system.

[0017] In some embodiments, the inorganic heat insulation pad is an asbestos pad with a thickness of 1-3 mm, which is continuously laid along the upper and lower end faces of the glass assembly.

[0018] In some embodiments, the flexible fire-resistant sealing strip is a ceramic fiber cotton strip, which is fixed to the left and right sides of the glass assembly by a high-temperature resistant adhesive, with a compression filling rate of 20%-40%.

[0019] In some embodiments, the glass assembly is composed of fire-resistant glass and tempered glass stacked together, wherein the tempered glass is disposed facing the inside of the cleanroom and the fire-resistant glass is disposed facing the outside of the cleanroom.

[0020] In some embodiments, the metal frame system includes a metal inner frame, a metal pressure frame, and a metal decorative frame;

[0021] The metal pressure frame is locked to the inner metal frame by fasteners, pressing and fixing the glass assembly;

[0022] The metal decorative frame covers the outside of the metal pressure frame and is connected to the inner metal frame by fasteners.

[0023] In some embodiments, the gap between the metal decorative frame and the glass assembly is filled with a high-temperature resistant structural adhesive with a temperature tolerance of ≥ 800°C.

[0024] In some embodiments, the fastener is a self-tapping screw, specifically including:

[0025] The first set of self-tapping screws penetrates the metal pressure frame and locks it to the inner metal frame;

[0026] The second set of self-tapping screws was driven into the inner metal frame from the top of the metal decorative frame.

[0027] The beneficial effects that a fireproof observation window for cleanrooms disclosed in this application may bring include, but are not limited to:

[0028] This utility model is a fireproof observation window for cleanrooms. It has the advantages of cleanroom observation windows, such as high airtightness, easy cleaning, and no dust accumulation, while also maintaining structural integrity under continuous high temperatures during a fire. Attached Figure Description

[0029] Figure 1 This is the front view of the present invention.

[0030] Figure 2 for Figure 1 A schematic diagram of AA.

[0031] Figure 3 for Figure 2 Enlarged view of part C.

[0032] Figure 4This is a schematic diagram of the fastener (self-tapping screw) installation method.

[0033] Illustration: 1-Metal inner frame, 2-Asbestos pad, 3-Ceramic fiber cotton strip, 4-Fireproof glass, 5-Tempered glass, 6-Metal pressure frame, 7-Metal decorative frame. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] Conversely, this application covers any substitutions, modifications, equivalent methods, and schemes made within the spirit and scope of this application as defined in the claims. Furthermore, to provide the public with a better understanding of this application, certain specific details are described in detail below. However, this application can be fully understood by those skilled in the art even without these detailed descriptions.

[0036] like Figure 1-4 As shown, a fireproof observation window for a cleanroom includes a metal frame system and a glass assembly, with a heat conduction insulation system between the metal frame system and the glass assembly. The metal frame system includes a metal inner frame 1, a metal pressure frame 6, and a metal decorative frame 7. The metal pressure frame 6 is locked to the metal inner frame 1 by fasteners, pressing and fixing the glass assembly. The metal decorative frame 7 covers the outside of the metal pressure frame 6 and is connected to the metal inner frame 1 by fasteners. Optionally, the gap between the metal decorative frame 7 and the glass assembly is filled with a high-temperature resistant structural adhesive with a temperature resistance ≥ 800℃.

[0037] In some embodiments, the fasteners are self-tapping screws, specifically including: a first set of self-tapping screws penetrating the metal pressure frame 6 and locking it to the metal inner frame 1; and a second set of self-tapping screws being driven into the metal inner frame 1 from the top of the metal decorative frame 7. Specifically, the self-tapping screws (M4×20mm) vertically penetrate the pre-drilled holes in the pressure frame and are screwed into the threaded holes in the metal inner frame 1.

[0038] The heat conduction isolation system is configured to have the following functions:

[0039] (a) Used to block the heat transfer path from the metal frame to the glass assembly;

[0040] (b) To allow non-fire-resistant layers in glass assemblies to preferentially fail and detach at high fire temperatures;

[0041] (c) Used to maintain the structural integrity of the fireproof layer to meet the fire protection time limit requirements.

[0042] The heat conduction isolation system includes inorganic heat insulation pads and flexible fire-resistant sealing strips;

[0043] Inorganic thermal insulation pads are placed between the upper and lower edges of the glass assembly and the metal frame system;

[0044] Flexible fire-resistant sealing strips are placed between the glass assembly and the metal frame system on both sides.

[0045] In some embodiments, the inorganic heat insulation pad is an asbestos pad 2 with a thickness of 1-3 mm, which is continuously laid along the upper and lower end faces of the glass assembly. Specifically, the asbestos pad 2 can be bonded to the grooves on the upper and lower end faces of the metal inner frame 1 with high-temperature resistant silicone adhesive (temperature resistant 400℃).

[0046] The flexible fire-resistant sealing strip is a ceramic fiber cotton strip 3, which is fixed to the left and right sides of the glass assembly by a high-temperature resistant adhesive, that is, it is pasted on the left and right sides of the laminated fireproof glass 4 and tempered glass 5, with a compression filling rate of 20%-40%. The glass assembly is composed of laminated fireproof glass 4 and tempered glass 5, with the tempered glass 5 facing the inside of the clean room and the fireproof glass 4 facing the outside of the clean room.

[0047] The gap between the metal decorative frame 7 and the glass is filled with high-temperature resistant structural adhesive to prevent dust accumulation. In the event of a fire, one side of the tempered glass 5 will soften and collapse first. This is to prevent the heated internal air from expanding and affecting the structural integrity of the fireproof glass 4 side.

[0048] The assembly process is as follows:

[0049] Step 1: Pre-install the insulation layer

[0050] Cut the asbestos pad 2 to the same length as the upper and lower grooves of the metal inner frame 1 (tolerance ±0.5mm).

[0051] Apply high-temperature silicone adhesive (400℃ resistant) evenly to the back of the pad and attach it to the upper and lower mounting grooves of the metal inner frame 1.

[0052] Let it stand and cure for 30 minutes.

[0053] Step 2: Glass component processing

[0054] The ceramic fiber cotton strip 3 is cut into the side height of the fireproof glass 4 and tempered glass 5 laminate (tolerance ±0.2mm).

[0055] The cotton strip is heated to 80°C using a spray gun, causing its surface to slightly melt. It is then quickly pressed onto both sides of the glass to form a continuous sealed interface.

[0056] Step 3: Frame Assembly

[0057] Vertically embed the glass assembly into the inner metal frame 1, ensuring:

[0058] The lower end face of the glass is in complete contact with the asbestos pad 2 (gap ≤ 0.1mm);

[0059] The ceramic fiber cotton strip 3 is compressed to 70% of its initial thickness (compression force approximately 5 kPa);

[0060] Place the metal frame 6 to cover the outer surface of the glass, and use an electric screwdriver to drive in self-tapping screws (80mm spacing) with a torque of 8-10 N·m to lock the frame and the inner metal frame 1.

[0061] Step 4: Sealing the decorative frame

[0062] Fasten the metal decorative frame 7 to the outside of the pressure frame, and drive in self-tapping screws (100mm spacing) from top to bottom to connect the metal inner frame 1;

[0063] Inject high-temperature resistant structural adhesive into the 0.5mm gap between the decorative frame and the glass using a caulking gun, with a filling depth of ≥3mm;

[0064] Smooth the adhesive surface and cure under UV light for 10 minutes.

[0065] Test conditions Traditional observation window results The result of this utility model High temperature test (GB / T 9978) 300℃ / 10min Structural adhesive failure, glass displacement ≥2mm The ceramic fiber cotton strips showed slight carbonization and no displacement. 550℃ / 30min The tempered glass shattered, and the frame deformed. Tempered glass softened and detached, while fireproof glass remained intact. 850℃ / 60min Overall collapse Fire-resistant glass surface temperature rise ≤180℃, no cracks

[0066] Fire response mechanism verification

[0067] Cleanroom performance testing

[0068] Air tightness (ISO 14644-7): Leakage rate <0.01% vol / h (Class 5) under ±500Pa pressure difference.

[0069] Cleanliness (GMP standard): Surface contact angle θ=12° (<15° is acceptable), dead-angle-free design passed 3μm particle scanning test.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fireproof observation window for a cleanroom, comprising a metal frame system and a glass assembly, characterized in that: A thermal conductivity isolation system is provided between the metal frame system and the glass assembly; The heat conduction isolation system is configured as follows: (a) Used to block the heat transfer path from the metal frame to the glass assembly; (b) To allow non-fire-resistant layers in glass assemblies to preferentially fail and detach at high fire temperatures; (c) Used to maintain the structural integrity of the fireproof layer to meet the fire protection time limit requirements.

2. The fireproof observation window according to claim 1, characterized in that: The heat conduction isolation system includes an inorganic heat insulation pad (2) and a flexible fire-resistant sealing strip; The inorganic heat insulation pad (2) is disposed between the upper and lower edges of the glass assembly and the metal frame system; The flexible fire-resistant sealing strip is located between the two sides of the glass assembly and the metal frame system.

3. The fireproof observation window according to claim 2, characterized in that: The inorganic heat insulation pad is an asbestos pad (2) with a thickness of 1-3mm, which is continuously laid along the upper and lower surfaces of the glass assembly.

4. The fireproof observation window according to claim 2, characterized in that: The flexible fire-resistant sealing strip is a ceramic fiber cotton strip (3), which is fixed to the left and right sides of the glass assembly by a high-temperature resistant adhesive, with a compression filling rate of 20%-40%.

5. The fireproof observation window according to claim 1, characterized in that: The glass assembly is composed of fireproof glass (4) and tempered glass (5) stacked together, wherein the tempered glass (5) is arranged facing the inside of the clean room and the fireproof glass (4) is arranged facing the outside of the clean room.

6. The fireproof observation window according to claim 1, characterized in that: The metal frame system includes a metal inner frame (1), a metal pressure frame (6), and a metal decorative frame (7). The metal pressure frame (6) is locked to the metal inner frame (1) by fasteners to press and fix the glass assembly; The metal decorative frame (7) covers the outside of the metal pressure frame (6) and is connected to the metal inner frame (1) by fasteners.

7. The fireproof observation window according to claim 6, characterized in that: The gap between the metal decorative frame (7) and the glass assembly is filled with high-temperature resistant structural adhesive, which has a temperature resistance of ≥ 800℃.

8. The fireproof observation window according to claim 6, characterized in that: The fasteners are self-tapping screws, specifically including: The first set of self-tapping screws penetrates the metal pressure frame (6) and locks it to the metal inner frame (1); The second set of self-tapping screws is driven into the inner metal frame (1) from the top of the metal decorative frame (7).

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