Double seal bar sealed door and fire prevention system

Abstract

The utility model relates to a kind of double sealing strip airtight door and fireproof system, comprising: door frame mechanism, it includes: frame body, main sealing strip, secondary sealing strip and pivot, the sealing groove is opened in frame body inner wall, the main sealing strip is embedded in sealing groove, the frame body inner wall is provided with clamping part, the secondary sealing strip is clamped in the clamping part, the pivot is arranged in one side of frame body;Door plate mechanism, it includes door body, the door body size is adapted to frame body and is hinged to frame body by pivot, the door body circumferential side is equipped with first sealing surface and second sealing surface, the first sealing surface can abut on main sealing strip, the second sealing surface can abut on secondary sealing strip.The utility model is set as above, on the one hand, when one group of sealing strip is damaged, another group of sealing strip can still keep sealing, on the other hand, two sealing strips can be stacked to improve the sealing performance of airtight door.

Description

Technical Field

[0001] This utility model relates to the field of airtight door technology, and in particular to a double-seal airtight door and fireproof system. Background Technology

[0002] Explosion-proof airtight doors are doors with high sealing performance, mainly used to prevent the penetration of air, moisture and other substances. They are widely used in places that require isolated spaces, such as civil defense spaces, laboratories, food storage rooms, archives, etc. The design and manufacture of airtight doors need to take into account a variety of factors to ensure that their functions are realized.

[0003] Most existing explosion-proof airtight doors use a single sealing strip structure, and their sealing principle relies on the single compression between the sealing strip and the contact surface. When subjected to an explosive shock wave or strong wind pressure, the single sealing strip is prone to excessive compression deformation or failure to fix, resulting in an increased sealing gap, which cannot prevent the high-temperature gas, toxic fumes or shock wave generated by the explosion from spreading to unaffected areas. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problems of low fault tolerance and insufficient structural strength of single-seal-strip airtight doors in the prior art, thereby providing a double-seal-strip airtight door and fire protection system.

[0005] To solve the above-mentioned technical problems, this utility model provides a double-sealable door, comprising:

[0006] A door frame mechanism includes: a frame body, a main sealing strip, a secondary sealing strip, and a rotating shaft. A sealing groove is provided on the inner wall of the frame body, the main sealing strip is embedded in the sealing groove, a snap-fit ​​component is provided on the inner wall of the frame body, the secondary sealing strip is snapped into the snap-fit ​​component, and the rotating shaft is located on one side of the frame body.

[0007] A door panel mechanism includes a door body, the door body being sized to fit a frame and hinged to the frame via a pivot. The door body has a first sealing surface and a second sealing surface on its periphery. The first sealing surface abuts against a main sealing strip, and the second sealing surface abuts against a secondary sealing strip.

[0008] In one embodiment of the present invention, the door panel includes: a panel body and a protrusion, the protrusion being arranged around the periphery of the panel body, and the first sealing surface and the second sealing surface being located on one side of the panel body and the protrusion, respectively.

[0009] In one embodiment of the present invention, the frame includes: a first sub-frame, a connecting part, and a second sub-frame. The size of the first sub-frame is larger than the size of the second sub-frame. The first sub-frame and the second sub-frame are connected by the connecting part, and the sealing groove is formed by the connecting part and the second sub-frame.

[0010] In one embodiment of the present invention, the protrusion is connected to an extension on its periphery, and the extension is capable of abutting against the periphery of the second sub-frame.

[0011] In one embodiment of the present invention, the snap-fit ​​component includes: a first bent portion and a second bent portion, wherein the first bent portion is connected to the connecting portion, the second bent portion is connected to the first bent portion, and the plane of the first bent portion is perpendicular to the plane of the second bent portion.

[0012] In one embodiment of the present invention, the secondary sealing strip includes a snap-fit ​​portion and a sealing portion. The snap-fit ​​portion can snap onto the second bend portion, and the sealing portion can abut against the second sealing surface and the second bend portion.

[0013] In one embodiment of this utility model, there is a gap between the first bent portion and the plate body.

[0014] In one embodiment of the present invention, a filling space is formed inside the door panel, the inner wall of the filling space is provided with reinforcing ribs, and fireproof cotton is filled between the reinforcing ribs.

[0015] In one embodiment of this utility model, the door body is further provided with a rotating wheel and a door lock.

[0016] This utility model also discloses a fire protection system, including the above-mentioned double-seal door.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0018] This utility model discloses a double-seal door, in which the main sealing strip is embedded in a sealing groove for contact with the door panel mechanism, and the secondary sealing strip is fixed to the snap-fit ​​component by a snap-fit ​​method, forming a second sealing structure. It is used to hinge the door panel mechanism. The door panel size is adapted to the frame and is hinged to the frame via a pivot, allowing it to rotate around the pivot to open / close. Two sealing surfaces are provided along the thickness direction on the periphery of the door: the first sealing surface is located on the side of the door closer to the center of the frame, i.e., the relatively inner circumferential surface of the door; the second sealing surface is located on the side of the door farther from the center of the frame, i.e., the relatively outer circumferential surface of the door. When the door is closed, the first sealing surface abuts against the main sealing strip, and the second sealing surface approaches and abuts against the secondary sealing strip, forming a double seal. On the one hand, if one set of sealing strips is damaged, the other set of sealing strips can still maintain a seal; on the other hand, the two sealing strips can be stacked to improve the sealing performance of the door. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is an exploded view of the sealing door of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the sealing door of this utility model;

[0022] Figure 3 This is a structural schematic diagram of the airtight door and reinforcing ribs of this utility model;

[0023] Figure 4 This is a cross-sectional view of the airtight door of this utility model;

[0024] Figure 5 This is a partial sectional view of the airtight door of this utility model.

[0025] Explanation of reference numerals in the accompanying drawings: 1. Door body; 11. Panel; 12. Protrusion; 13. Extension; 2. Main sealing strip; 3. Secondary sealing strip; 31. Snap-fit ​​part; 32. Sealing part; 4. Frame; 41. First sub-frame; 42. Connecting part; 43. Second sub-frame; 44. First bend; 45. Second bend; 5. Wheel; 6. Lock; 7. Shaft; 8. Reinforcing rib; 9. Fireproof cotton. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0027] Example

[0028] Reference Figures 1-5 As shown, the present invention provides a double-seal door, comprising:

[0029] A door frame mechanism includes: a frame body 4, a main sealing strip 2, a secondary sealing strip 3, and a rotating shaft 7. The inner wall of the frame body 4 is provided with a sealing groove, the main sealing strip 2 is embedded in the sealing groove, a snap-fit ​​component is provided on the inner wall of the frame body 4, the secondary sealing strip 3 is snapped into the snap-fit ​​component, and the rotating shaft 7 is located on one side of the frame body 4.

[0030] A door panel mechanism includes a door body 1, the door body 1 being adapted to the size of a frame 4 and hinged to the frame 4 via a pivot 7. The door body 1 has a first sealing surface and a second sealing surface on its periphery. The first sealing surface can abut against a main sealing strip 2, and the second sealing surface can abut against a secondary sealing strip 3.

[0031] This utility model discloses a double-seal door. The inner wall of the frame 4 has a continuous sealing groove along its circumference. The main sealing strip 2 is embedded in this sealing groove, and its size is larger than the groove so that part of its outline protrudes outside the groove for contact with the door panel mechanism. A snap-fit ​​component is also fixed to the inner wall of the frame 4, and the secondary sealing strip 3 is fixed to the snap-fit ​​component by snap-fit, forming a second sealing structure. A pivot 7 is fixed to one side of the frame 4 for hinged connection to the door panel mechanism. The door panel size is adapted to the frame 4 and is hinged to the frame 4 via the pivot 7, allowing it to rotate around the pivot 7 to open / close. Two sealing surfaces are provided along the thickness direction on the circumference of the door body 1: the first sealing surface is located on the inner circumference of the door body 1 near the center of the frame 4, and the second sealing surface is located on the outer circumference of the door body 1 away from the center of the frame 4. When the door body 1 is closed, the first sealing surface abuts against the main sealing strip 2, and the second sealing surface approaches and abuts against the secondary sealing strip 3, forming a double seal.

[0032] Specifically, when door 1 is closed, it rotates around pivot 7 towards frame 4. As door 1 continues to rotate until it is fully closed, the first sealing surface of door 1 contacts the main sealing strip 2. At this time, the main sealing strip 2 is compressed and deformed into the sealing groove, filling the gap between the first sealing surface and frame 4, forming a first seal. The second sealing surface of door 1 contacts the secondary sealing strip 3. The secondary sealing strip 3 is compressed and undergoes elastic deformation, filling the gap between the second sealing surface and the snap-fit ​​component, forming a second seal. This double-sealing structure effectively prevents the penetration of external media through two sealing paths.

[0033] The main sealing strip 2 is made of fluorosilicone rubber (temperature resistance -50℃~250℃, compression set ≤15%), providing basic sealing under normal conditions. The secondary sealing strip 3 is made of expanded graphite composite strip (containing flame-retardant nitrile rubber matrix), which expands to fill the gap when the pressure is ≥0.2MPa, with a sealing response time <0.1 seconds.

[0034] The door panel is protected by powder coating on galvanized steel sheet: the base material is SGCC galvanized steel sheet (zinc layer thickness ≥20μm), and the surface is electrostatically sprayed with an epoxy-polyester mixed powder coating (thickness 80-100μm), which shows no rust after 2000 hours of neutral salt spray testing. The door panel is filled with ceramicized silicate fireproof cotton 9 (density ≥120kg / m³, melting point >1800℃), with a fire resistance limit ≥2.5 hours (tested by GB / T9978.1-2008), achieving A1-level fireproof filling. Using a composite structure of "galvanized steel sheet + ceramicized silicate fireproof cotton 9 + reinforcing ribs 8", the door body thickness is reduced to 65mm, and the weight is reduced by 40% (door weight ≤400kg under the same explosion-proof rating).

[0035] Door frame structure: Constructed from bent galvanized steel sheet (3.0mm thick). Anti-seismic anchors (M16 bolts, tensile strength ≥8.8) are pre-embedded at the connection between the frame and the wall to ensure overall explosion-proof stability. Door panel assembly: The outer layer is a galvanized sheet powder-coated panel (3.0mm thick), the inner layer has welded grid-shaped reinforcing ribs 8 (Q345 steel), and the middle layer is filled with ceramicized silicate fireproof cotton 9, formed by vacuum hot pressing (pressure 1.8MPa, temperature 120℃). A 2.5mm assembly gap is reserved between the door panel and the frame. The secondary sealing strip 3 is fixed to the frame with clips. The main sealing strip 2 is a solid square fluorosilicone rubber strip (section diameter 15*15mm) with a pre-compression of 30%; the secondary sealing strip 3 is a hollow expanded graphite composite strip (width 15mm), with a 0.5mm gap from the frame under normal conditions.

[0036] The manufacturing process of the airtight door is as follows: Step 1: Laser cutting of galvanized sheet and bending into shape, argon arc welding at the frame welding point, and grinding after welding until Ra≤3.2μm.

[0037] Step 2: After the substrate is phosphated (zinc phosphate solution, film thickness 3-5μm), epoxy-polyester powder is electrostatically sprayed (cured at 180℃ for 20 minutes).

[0038] Step 3: Assemble the inside of the door panel in the following order: "Positioning of reinforcing ribs 8 → Layered filling of fireproof cotton 9 → Vacuum hot pressing and curing".

[0039] Step 4: The sealing strip is installed using an embedded method (main sealing strip 2 is glued and fixed, secondary sealing strip 3 is snap-fit ​​assembled). After the door panel and frame are assembled, adjust the three-dimensional angle of the hinge (tolerance ±0.5mm).

[0040] The performance of the airtight door was verified in the following manner:

[0041] 1. Explosion resistance test: According to GB / T 38083-2019, after being subjected to an impact pressure of 0.3MPa, the deformation of the door body 1 is <3mm, and there is no seal failure.

[0042] 2. Fire resistance test: The fire resistance test shall be conducted in accordance with GB / T 9978.1-2008, and the temperature rise of the unexposed surface shall be <180℃ within 2.5 hours.

[0043] 3. Corrosion resistance test: After 2000 hours of salt spray test, the coating showed no blistering or peeling, and the rust area was <0.1%.

[0044] Reference Figure 1 , 5As shown, the door panel includes a panel 11 and protrusions 12. The protrusions 12 are arranged around the periphery of the panel 11. The first sealing surface and the second sealing surface are located on one side of the panel 11 and the protrusions 12, respectively. The panel 11 is a rectangular flat plate and is the main body of the door 1. Each of the four sides of the panel 11 has a protrusion 12 in a rectangular ring shape. When the door 1 is closed, the panel 11 enters the inner side of the frame 4. The first sealing surface of the panel 11 contacts the main sealing strip 2 in the sealing groove of the frame 4. The main sealing strip 2 is compressed and deformed, filling the gap between the panel 11 and the frame 4. The protrusions 12 are close to the snap-fit ​​member of the frame 4. The second sealing surface of the protrusions 12 contacts the secondary sealing strip 3 on the snap-fit ​​member. The secondary sealing strip 3 is compressed and deformed, filling the gap between the protrusions 12 and the snap-fit ​​member. At this time, the panel 11 and the protrusions 12 form a stepped structure, which cooperates with the sealing groove and the snap-fit ​​member of the frame 4 to form a double sealing structure.

[0045] Reference Figure 1 , 5 As shown, the frame 4 includes a first sub-frame 41, a connecting part 42, and a second sub-frame 43. The size of the first sub-frame 41 is larger than the size of the second sub-frame 43. The first sub-frame 41 and the second sub-frame 43 are connected by the connecting part 42. The sealing groove is formed by the connecting part 42 and the second sub-frame 43. When the door 1 is closed, the plate 11 corresponds to the second sub-frame 43. The connecting part 42, as the connection structure between the first sub-frame 41 and the second sub-frame 43, not only enhances the overall strength of the frame but also provides a horizontal support surface for the sealing groove, preventing the main sealing strip 2 from deforming outwards when compressed, thus improving sealing reliability.

[0046] Referring to Figure 5, an extension 13 is connected to the periphery of the protrusion 12, and the extension 13 can abut against the periphery of the second sub-frame 43. The abutment between the extension 13 and the second sub-frame 43 increases the contact area between the door 1 and the frame, improving the stability of the door 1. When the door 1 is subjected to external impacts such as blast shock waves, the extension 13 can share part of the impact force and reduce the deformation of the door 1. Since there is a gap between the protrusion 12 and the first sub-frame 41 to provide clearance during rotation, the extension 13 can cover this gap, improving the integrity of the airtight door when closed.

[0047] Reference Figure 5As shown, the snap-fit ​​component includes a first bent portion 44 and a second bent portion 45. The first bent portion 44 is connected to the connecting portion 42, and the second bent portion 45 is connected to the first bent portion 44. The plane of the first bent portion 44 is perpendicular to the plane of the second bent portion 45. The secondary sealing strip 3 includes a snap-fit ​​portion 31 and a sealing portion 32. The snap-fit ​​portion 31 can snap onto the second bent portion 45, and the sealing portion 32 can abut against the second sealing surface and the second bent portion 45. The snap-fit ​​component is a metal bent component, and the first bent portion 44 and the second bent portion 45 are integrally formed. The snap-fit ​​portion 31 of the secondary sealing strip 3 is a U-shaped groove adapted to the second bent portion 45; the first bent portion 44 and the second bent portion 45 can also form a spring sheet structure, allowing the secondary sealing strip 3 to elastically abut.

[0048] There is a gap between the first bent portion 44 and the plate 11. The plane where the first bent portion 44 is located is perpendicular to the plane where the airtight door is located, so that the sealing groove protrudes from the plate 11 along the plane where the airtight door is located, that is, the main sealing strip 2 protrudes from the plate 11 along the plane where the airtight door is located. When the door is closed, the main sealing strip 2 is squeezed and deformed, which can form a lining on the side of the plate 11, further improving the sealing performance.

[0049] Reference Figure 3 , 4 As shown, a filling space is formed within the door panel, and the inner wall of the filling space is provided with reinforcing ribs 8. Fireproof cotton 9 is filled between the reinforcing ribs 8. The reinforcing ribs 8 are arranged crisscrossingly along the length and width directions of the door body 1, dividing the filling space into multiple independent compartments, each of which is filled with fireproof cotton 9. The crisscrossing arrangement of the reinforcing ribs 8 forms a "grid-like" structure, which enhances the overall structural strength of the door panel. When the door panel is subjected to external impact, the reinforcing ribs 8 can disperse the impact force and reduce the deformation of the door panel. In the event of a fire, the fireproof cotton 9 can prevent the fire from spreading to the other side of the door panel, while also providing heat insulation and reducing the surface temperature of the door panel. In addition, the hollow filling space and the fireproof cotton 9 also have good sound insulation performance.

[0050] Reference Figure 2 As shown, the door body 1 is also equipped with a rotating wheel 5 and a door lock 6. The rotating wheel 5 is used to drive the door lock 6, and the latch of the door lock 6 can be inserted into the lock hole on the frame, so that the sealed door can be opened or kept closed. The door lock 6 and the rotating shaft 7 are located on the same side of the sealed door, which is the side closer to the space to be sealed, to prevent the sealed door from being opened from the outside. In some embodiments, rotating wheels 5 are provided on both sides of the door panel.

[0051] This utility model also discloses a fire protection system, including the above-mentioned double-seal door.

[0052] The fire protection system described in this utility model includes a double-sealed explosion-proof airtight door, a fire detector, an automatic fire extinguishing device, an alarm device, and a linkage control device.

[0053] Double-sealed explosion-proof airtight doors are installed at the fire compartment separation points of buildings as fire compartment separation facilities, such as stairwell entrances, elevator shaft exits, and fire passage entrances;

[0054] Fire detectors, such as smoke detectors or heat detectors, are installed on the ceiling within fire compartments to detect fire signals such as smoke or temperature rises.

[0055] Automatic fire extinguishing devices, such as automatic sprinkler systems or gas extinguishing systems, are installed on the walls within fire compartments to automatically extinguish fires in the event of a fire.

[0056] Alarm devices such as audible and visual alarms are installed at the exits of fire compartments to issue fire alarms.

[0057] Linkage control devices, such as fire linkage controllers, are installed in the fire control room to receive signals from fire detectors and control the operation of automatic fire extinguishing devices, alarm devices, and explosion-proof airtight doors with double sealing strips.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dual seal bar closure door characterized by, include: A door frame mechanism includes: a frame body, a main sealing strip, a secondary sealing strip, and a rotating shaft. A sealing groove is provided on the inner wall of the frame body, the main sealing strip is embedded in the sealing groove, a snap-fit ​​component is provided on the inner wall of the frame body, the secondary sealing strip is snapped into the snap-fit ​​component, and the rotating shaft is located on one side of the frame body. A door panel mechanism includes a door body, the door body being sized to fit a frame and hinged to the frame via a pivot. The door body has a first sealing surface and a second sealing surface on its periphery. The first sealing surface abuts against a main sealing strip, and the second sealing surface abuts against a secondary sealing strip.

2. The dual-seal-bar closure door of claim 1, wherein: The door panel includes a panel body and a protrusion, the protrusion being arranged around the periphery of the panel body, and the first sealing surface and the second sealing surface being located on one side of the panel body and the protrusion, respectively.

3. A dual-seal-bar closure door according to claim 2, wherein: The frame includes: a first sub-frame, a connecting part, and a second sub-frame. The size of the first sub-frame is larger than the size of the second sub-frame. The first sub-frame and the second sub-frame are connected by the connecting part. The sealing groove is formed by the connecting part and the second sub-frame.

4. A dual-seal-bar closure door according to claim 3, wherein: The protrusion is connected to an extension on its periphery, and the extension is able to abut against the periphery of the second sub-frame.

5. The dual-seal-bar closure door of claim 1, wherein: The snap-fit ​​component includes a first bent portion and a second bent portion. The first bent portion is connected to the connecting portion, and the second bent portion is connected to the first bent portion. The plane of the first bent portion is perpendicular to the plane of the second bent portion.

6. A double-seal door according to claim 5, characterized in that: The secondary sealing strip includes a snap-fit ​​portion and a sealing portion. The snap-fit ​​portion can snap onto the second bend portion, and the sealing portion can abut against the second sealing surface and the second bend portion.

7. A double-seal door according to claim 5, characterized in that: There is a gap between the first bent portion and the plate.

8. A double-seal door according to claim 1, characterized in that: The door panel has a filling space inside, the inner wall of the filling space is provided with reinforcing ribs, and fireproof cotton is filled between the reinforcing ribs.

9. A double-seal door according to claim 1, characterized in that: The door is also equipped with a wheel and a lock.

10. A fire protection system, characterized in that, Including a double-seal door as described in any one of claims 1-9.

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