Passive thermal insulation door

Abstract

The utility model relates to the technical field of grain storage, disclose a passive heat preservation airtight door, including zinc iron alloy door frame and steel frame, the inside of zinc iron alloy door frame is provided with fire prevention mechanism, fire prevention mechanism is used for preventing fire, the inside of steel frame is provided with compression resistance mechanism, compression resistance mechanism is used for improving the wind pressure performance of door and window, fire prevention mechanism includes galvanized pipe no.

Description

Technical Field

[0001] This utility model relates to the field of grain storage technology, and in particular to a passive heat-insulating and airtight door. Background Technology

[0002] In grain storage, doors and windows are key nodes for interaction between the grain warehouse and the external environment. Their insulation and airtightness directly affect the stability of temperature and humidity inside the grain pile. In existing technology, traditional storage doors and windows generally adopt a basic structure of frame + sealing strip + single-layer board. The thermal conductivity of the window frame material itself or the filling of polystyrene or polyurethane insulation material inside the window sash is used. The sealing design is achieved by setting rubber sealing strips at the contact edges between the window frame and the window sash, and using single-point or multi-point locking mechanisms to squeeze the rubber strips to achieve a seal.

[0003] Traditional doors and windows have fireproof insulation layers that come into direct contact with the metal connectors of the window frame and sash, creating thermal bridges. This allows external heat to be directly conducted into the interior through the metal components. The joints between the sash and the frame are generally made using a flat bonding method, leaving a 3-5mm gap between the fireproof insulation material and the joints, creating heat dissipation channels. The fireproof insulation layer is not tightly bonded to the main structure. In existing technologies, fireproof insulation layers are mostly post-filled, and the connection between the fireproof insulation layer and the window frame relies solely on adhesives or simple snap-fits. Over time, this can lead to detachment or deformation, causing the fireproof insulation layer to fail and reducing fire safety. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a passive heat-insulating airtight door, which aims to improve the problem that in the existing technology, the fireproof insulation layer is mostly filled in after the fact, and the connection with the window frame relies only on adhesive or simple snap-fit. After long-term use, it will fall off or deform, resulting in the failure of the fireproof insulation layer and a reduction in fire safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a passive heat-insulating airtight door, comprising a zinc-iron alloy door frame and a steel frame, wherein the zinc-iron alloy door frame is provided with a fire-resistant mechanism for fire prevention, and the steel frame is provided with a pressure-resistant mechanism for improving the wind pressure resistance of the door and window;

[0006] The fireproof mechanism includes a galvanized pipe, the rear side of which is fixedly connected to the rear interior of the zinc-iron alloy door frame. A high-temperature heat-insulating plate is fixedly connected to the left front end of the galvanized pipe, and two zinc-iron alloy steel plates are fixedly connected to the right front end of the galvanized pipe. A flame-retardant carbon crystal plate is fixedly connected between adjacent zinc-iron alloy steel plates, and the same flame-retardant polystyrene extruded board is fixedly connected between adjacent flame-retardant carbon crystal plates. A sealing component is provided on the right interior side of the zinc-iron alloy door frame.

[0007] As a further description of the above technical solution:

[0008] The pressure-resistant mechanism includes a thermally broken aluminum profile for the door leaf. The outer wall of the thermally broken aluminum profile is fixedly connected to the inner left side of the steel frame. A galvanized pipe is fixedly connected to the inner front left end of the zinc-iron alloy door frame. An angle steel connector is fixedly connected to the left side of the zinc-iron alloy door frame. Cover plates are fixedly connected to the opposite sides of the two zinc-iron alloy steel plates.

[0009] As a further description of the above technical solution:

[0010] The fireproof mechanism also includes two fixing screws, which are threaded to the opposite sides of two zinc-iron alloy steel plates. The inner left and right sides of the thermal break aluminum profile of the door leaf are fixedly connected with partition nylon strips.

[0011] As a further description of the above technical solution:

[0012] The fireproof mechanism also includes a stainless steel concealed hinge, the front side of which is fixedly connected to the inner front side of the zinc-iron alloy door frame, and the right side of which is fixedly connected to the left side of the thermal break aluminum profile of the door leaf.

[0013] As a further description of the above technical solution:

[0014] The sealing assembly includes two fireproof sealing strips, which are fixedly connected to the front and rear sides of the inside of the zinc-iron alloy door frame, respectively. A waterproof and breathable membrane is fixedly connected to the left side of the zinc-iron alloy door frame.

[0015] As a further description of the above technical solution:

[0016] The left side of the zinc-iron alloy door frame is threaded with an internal expansion screw, and the left side of the galvanized pipe is threaded with a fixing bolt.

[0017] As a further description of the above technical solution:

[0018] The thickness of the door leaf is set to 73.0MM-77.0MM, and the thickness of the thermally broken aluminum profile of the door leaf is set to 1.8MM-2.2MM. Preferably, the thickness of the door leaf is set to 75.0MM, and the thickness of the thermally broken aluminum profile of the door leaf is set to 2.0MM.

[0019] As a further description of the above technical solution:

[0020] The width of the zinc-iron alloy door frame is set to 128.0MM-132.0MM, and the width of the cover plate is set to 36.0MM-40.0MM. Preferably, the width of the zinc-iron alloy door frame is set to 130.0MM, and the width of the cover plate is set to 38.0MM.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a fireproof mechanism is supported by a galvanized pipe, a high-temperature resistant heat insulation board blocks high temperatures, a zinc-iron alloy steel plate forms a double layer of protection to prevent flame penetration, a flame-retardant carbon crystal plate stabilizes and suppresses fire when exposed to high temperatures, a flame-retardant extruded polystyrene board blocks heat conduction, forming a multi-layer barrier, an aluminum alloy thermal break treatment to break the heat channel, a thickened zinc-iron alloy plate to enhance the overall integrity, and a sealing component to reduce air convection, thus achieving effective fireproofing of the door, delaying heat transfer and suppressing the spread of fire. At the same time, the low heat transfer coefficient achieves heat preservation, enhances the fit and airtightness between the door frame and the door body, and improves the fireproofing and heat preservation and airtightness of the door body.

[0023] 2. In this utility model, the thermally broken aluminum profile of the door leaf serves as the skeleton. Its thermal break structure insulates heat and disperses wind pressure impact. The steel frame provides the installation foundation and enhances the strength of the door leaf. The galvanized pipe and angle steel connectors form a door frame support system, which respectively bears the lateral force and strengthens the connection, improving the resistance to deformation. The cover plate covers the gaps to make the wind pressure act evenly. The combination of multiple materials in the door frame and lower sill enhances rigidity, realizing the effective resistance of the door body to longitudinal and lateral wind pressure, avoiding localized deformation, and enhancing the overall structural rigidity while ensuring thermal performance, thus significantly improving the wind pressure resistance of the door body. Attached Figure Description

[0024] Figure 1 This is a front view of a passive thermal insulation and airtight door proposed in this utility model;

[0025] Figure 2 This is a cross-sectional view of a fire-prevention mechanism in a passive insulated airtight door proposed in this utility model.

[0026] Figure 3 This is a cross-sectional view of the anti-compression mechanism in a passive thermal insulation and airtight door proposed in this utility model;

[0027] Figure 4 This is a cross-sectional view of a sealing component in a passive thermal insulation and airtight door proposed in this utility model.

[0028] Legend:

[0029] 1. Zinc-iron alloy door frame; 2. Fireproof mechanism; 21. Galvanized pipe I; 22. High-temperature heat-resistant insulation board; 23. Zinc-iron alloy steel plate; 24. Flame-retardant carbon crystal plate; 25. Flame-retardant extruded polystyrene board; 26. Fixing screws; 27. Partition nylon strip; 28. Stainless steel concealed hinge; 29. ​​Sealing components; 291. Fireproof sealing strip; 292. Waterproof and breathable membrane; 3. Compression-resistant mechanism; 31. Thermal break aluminum profile for door leaf; 32. Galvanized pipe II; 33. Angle steel connectors; 34. Cover plate; 4. Steel frame; 5. Internal expansion screws; 6. Fixing bolts. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model is provided: a passive heat-insulating airtight door, including a zinc-iron alloy door frame 1 and a steel frame 4. The zinc-iron alloy door frame 1 is provided with a fireproof mechanism 2 for fire prevention, and the steel frame 4 is provided with a pressure-resistant mechanism 3 for improving the wind pressure resistance of the door and window.

[0032] Fireproof mechanism 2 includes a galvanized pipe 21, the rear side of which is fixedly connected to the rear side of the zinc-iron alloy door frame 1. A high-temperature heat-insulating plate 22 is fixedly connected to the left front end of the galvanized pipe 21. Two zinc-iron alloy steel plates 23 are fixedly connected to the right front end of the galvanized pipe 21. A flame-retardant carbon crystal plate 24 is fixedly connected between adjacent zinc-iron alloy steel plates 23. The same flame-retardant polystyrene extruded board 25 is fixedly connected between adjacent flame-retardant carbon crystal plates 24. A sealing component 29 is provided on the right side of the interior of the zinc-iron alloy door frame 1.

[0033] Specifically, the door and window frame is made of all-aluminum alloy with thermal break treatment, the inner and outer core panels are made of thickened zinc-iron alloy plates, and the door and window cores are made of special fireproof and heat-insulating materials. When facing a fire, the galvanized pipe 21 serves as the basic frame of the fireproof mechanism 2, providing support for the overall structure. The high-temperature resistant heat insulation board 22 directly blocks the high temperature attack and slows down the heat transfer rate through its own high-temperature resistance. The two zinc-iron alloy steel plates 23 form a double-layer protective structure, which uses the high-temperature resistance of metal materials to enhance the strength of the fire barrier and prevent flames from directly penetrating the door frame.

[0034] The flame-retardant carbon crystal plate 24 between the zinc-iron alloy steel plates 23 maintains structural stability when exposed to high temperatures and suppresses the spread of fire through its own flame-retardant properties. The flame-retardant polystyrene extruded board 25 between the flame-retardant carbon crystal plates 24 further blocks the heat conduction path and reduces the possibility of heat transfer through the gaps between materials. Through the combination of the flame-retardant carbon crystal plate 24 and the flame-retardant polystyrene extruded board 25, a multi-layer fireproof and heat-insulating barrier is formed.

[0035] The all-aluminum alloy thermal break treatment of the door and window frame cuts off the heat conduction channel of the metal material, reducing the heat loss through the frame. The thickened zinc-iron alloy inner and outer core panels enhance the overall structure. Combined with the special fireproof and heat-insulating materials of the door and window core, the overall heat transfer coefficient is reduced. The sealing component 29 on the right side of the inside of the zinc-iron alloy door frame 1 enhances the tightness of the fit between the door frame and the door body, reducing the heat exchange caused by air convection.

[0036] The combination of galvanized pipe 21 and zinc-iron alloy steel plate 23 ensures the structural stability of fireproof mechanism 2; the combination of flame-retardant carbon crystal plate 24 and flame-retardant polystyrene extruded board 25 enhances the fireproof and heat insulation effect; the combination of aluminum alloy thermal break treatment and special insulation materials achieves low heat transfer coefficient insulation performance, thereby improving the fire resistance and heat insulation sealing effect of the door.

[0037] Reference Figure 2 , Figure 3 and Figure 4 The pressure-resistant mechanism 3 includes a thermally broken aluminum profile 31 for the door leaf. The outer wall of the thermally broken aluminum profile 31 is fixedly connected to the inner left side of the steel frame 4. A galvanized pipe 32 is fixedly connected to the inner front left end of the zinc-iron alloy door frame 1. An angle steel connector 33 is fixedly connected to the left side of the zinc-iron alloy door frame 1. A cover plate 34 is fixedly connected to the two zinc-iron alloy steel plates 23 on opposite sides.

[0038] Specifically, during door assembly, the thermally broken aluminum profile 31 serves as the main body of the door frame. Its thermally broken structure blocks the heat transfer path, while its own profile structure disperses the impact force brought by external wind pressure. The steel frame 4 provides the installation foundation for the thermally broken aluminum profile 31. Through the cooperation between the steel frame 4 and the thermally broken aluminum profile 31, the overall structural strength of the door is enhanced.

[0039] The galvanized pipe 32 on the front side of the zinc-iron alloy door frame 1 and the angle steel connector 33 on the left side form a door frame support system. The galvanized pipe 32 bears the lateral force, and the angle steel connector 33 strengthens the connection strength between the door frame and the installation structure. Through the cooperation of the galvanized pipe 32 and the angle steel connector 33, the door frame's resistance to deformation is improved.

[0040] Two zinc-iron alloy steel plates 23 are covered by a cover plate 34 on one side away from each other, which covers the edge gaps so that the external wind pressure is evenly applied to the door surface and avoids excessive local stress that could cause deformation. The zinc-iron alloy door frame 1 is made of high-strength zinc-iron alloy material and is treated with thermal break. The lower sill combines high-strength zinc-iron alloy, stainless steel material and solid wood filling. Through the combination of multiple materials, the overall structural rigidity is improved while ensuring thermal performance.

[0041] When subjected to external wind pressure, the thermally broken aluminum profile 31 and the steel frame 4 jointly bear the longitudinal force, the galvanized pipe 32 and the angle steel connector 33 disperse the lateral force, and the cover plate 34 ensures the uniform transmission of force. Through the cooperation of the thermally broken aluminum profile 31 and the steel frame 4, the longitudinal wind pressure is resisted; through the cooperation of the galvanized pipe 32 and the angle steel connector 33, the lateral deformation resistance of the door frame is enhanced; through the cooperation of the cover plate 34 and the zinc-iron alloy steel plate 23, the uniform distribution of force is ensured, thereby improving the wind pressure resistance of the door.

[0042] Reference Figure 2 The fireproof mechanism 2 also includes two fixing screws 26, which are threaded to the opposite sides of the two zinc-iron alloy steel plates 23. The inner left and right sides of the thermally broken aluminum profile 31 are fixedly connected with partition nylon strips 27. The fireproof mechanism 2 also includes stainless steel concealed hinges 28, which are fixedly connected to the front side of the zinc-iron alloy door frame 1 and to the left side of the thermally broken aluminum profile 31. The sealing component 29 includes two fireproof sealing strips 291, which are fixedly connected to the front and rear sides of the zinc-iron alloy door frame 1. A waterproof and breathable membrane 292 is fixedly connected to the left side of the zinc-iron alloy door frame 1.

[0043] Specifically, the two fixing screws 26 of the fireproof mechanism 2 are threadedly connected to the two zinc-iron alloy steel plates 23 on opposite sides. Through the cooperation of the fixing screws 26 and the zinc-iron alloy steel plates 23, the flame-retardant carbon crystal plate 24 and the flame-retardant polystyrene extruded board 25 are fastened between the zinc-iron alloy steel plates 23 to prevent the plates from loosening and falling off under high temperature. The left and right sides of the thermal break aluminum profile 31 are fixed with partition nylon strips 27. Through the cooperation of the partition nylon strips 27 and the thermal break aluminum profile 31, the heat conduction path inside the profile is blocked, and the heat insulation effect is enhanced.

[0044] The stainless steel concealed hinge 28 is fixed to the front side of the zinc-iron alloy door frame 1 and to the left side of the thermally broken aluminum profile 31 of the door leaf. When the door is opened and closed, the stainless steel concealed hinge 28 drives the thermally broken aluminum profile 31 of the door leaf to rotate around the zinc-iron alloy door frame 1. Through the cooperation of the stainless steel concealed hinge 28 and the two, the door can be opened and closed flexibly and the connection strength can be maintained.

[0045] The two fireproof sealing strips 291 of the sealing component 29 are fixed to the front and rear sides of the inside of the zinc-iron alloy door frame 1 respectively. When the door is closed, the fireproof sealing strips 291 are in close contact with the door surface. Through the cooperation between the fireproof sealing strips 291 and the zinc-iron alloy door frame 1, smoke and heat are blocked from penetrating through the gaps. The waterproof and breathable membrane 292 fixed on the left side of the zinc-iron alloy door frame 1, through the cooperation between the waterproof and breathable membrane 292 and the door frame, prevents moisture from seeping in while allowing gas to flow and balances the internal and external air pressure. The three sealing strips ensure the airtight function at the same time. Equipped with German imported 6-way adjustable hinges, the airtightness of the door and window not only meets the national standard of 1000pa pressure with a half-life of more than ten minutes, but also achieves the requirement of less than 1 air change per unit volume under N50 conditions.

[0046] In the event of a fire, the zinc-iron alloy steel plate 23 secured by the fixing screws 26 and the internal flame-retardant board form a fire barrier. The partition nylon strip 27 delays the transfer of heat through the profile, the stainless steel concealed hinge 28 maintains the structural integrity of the door, and the fireproof sealing strip 291 expands to seal the gaps and prevent the spread of flames. Under the action of wind pressure, the partition nylon strip 27 enhances the rigidity of the profile, and the stainless steel concealed hinge 28 disperses the force and ensures the stability of the door.

[0047] During opening and closing, the stainless steel concealed hinge 28 drives the door leaf to rotate smoothly, and the fireproof sealing strip 291 automatically adheres and seals as the door leaf closes. The fixing screw 26 and the zinc-iron alloy steel plate 23 are used to secure the plates. The insulation is enhanced by the combination of the partition nylon strip 27 and the thermal break aluminum profile 31 of the door leaf. The fireproof sealing strip 291 and the door frame are used to improve the sealing and fireproof effect, thereby improving the fireproof sealing performance and structural reliability of the door.

[0048] Reference Figure 1 , Figure 2 and Figure 3 The left side of the zinc-iron alloy door frame 1 is threaded with an internal expansion screw 5, the left side of the galvanized pipe 21 is threaded with a fixing bolt 6, the thickness of the door leaf is set to 73.0MM-77.0MM, the thickness of the thermally broken aluminum profile 31 is set to 1.8MM-2.2MM, the width of the zinc-iron alloy door frame 1 is set to 128.0MM-132.0MM, and the width of the cover plate 34 is set to 36.0MM-40.0MM.

[0049] Specifically, the left side of the zinc-iron alloy door frame 1 is threaded with an internal expansion screw 5. Through the cooperation of the internal expansion screw 5 and the zinc-iron alloy door frame 1, the door frame is fixed in the installation position, which enhances the connection strength between the door and the wall. The left side of the galvanized pipe 21 is threaded with a fixing bolt 6. The fixing bolt 6 passes through the galvanized pipe 21 and connects to the adjacent components. Through the cooperation of the fixing bolt 6 and the galvanized pipe 21, the support frame of the fireproof mechanism 2 is reinforced, ensuring the stable installation of each fireproof component.

[0050] The door leaf thickness is set to 75.0 mm, which is the preferred value and falls within the range of 73.0 mm to 77.0 mm. The thickness design of the door leaf provides sufficient installation space for internal fireproof and pressure-resistant components, while ensuring the rigidity of the overall door structure. The thickness of the thermally broken aluminum profile 31 is set to 2.0 mm, which falls within the range of 1.8 mm to 2.2 mm. The thickness of the thermally broken aluminum profile 31 is used to reduce the weight while maintaining sufficient wind pressure resistance, and works with the steel frame 4 to disperse external forces.

[0051] The width of the zinc-iron alloy door frame 1 is set to 130.0 mm, which is within the range of 128.0 mm to 132.0 mm. This width is the preferred value. The width design of the zinc-iron alloy door frame 1 accommodates the fireproof mechanism 2 and the sealing component 29, ensuring that each component is arranged in an orderly manner inside the door frame. The width of the cover plate 34 is set to 38.0 mm, which is within the range of 36.0 mm to 40.0 mm. The width of the cover plate 34 is matched to completely cover the gap on the side away from the zinc-iron alloy steel plate 23, thereby enhancing the airtightness of the door.

[0052] During installation, the internal expansion screws 5 are screwed into the left side of the zinc-iron alloy door frame 1 and penetrate into the wall. The door frame is fixed and positioned by the threaded engagement. The fixing bolts 6 are screwed into the left side of the galvanized pipe 21 to securely connect the galvanized pipe 21 to the door frame structure. The door leaf thickness of 75.0MM ensures that the internal flame-retardant carbon crystal plate 24 and flame-retardant polystyrene extruded board 25 are fully filled. The thermal break aluminum profile 31 with a thickness of 2.0MM ensures the connection strength with the stainless steel concealed hinge 28.

[0053] During use, the 130.0mm wide zinc-iron alloy door frame 1 provides installation space for the fireproof sealing strip 291. The 38.0mm wide cover plate 34 fits tightly with the zinc-iron alloy steel plate 23. The door is stably installed by the cooperation of the internal expansion screws 5 and the zinc-iron alloy door frame 1. The fireproof mechanism 2 is reinforced by the cooperation of the fixing bolts 6 and the galvanized pipe 21. The size matching of each component ensures the structural integrity and functional stability of the door, and improves the installation reliability and overall performance of the door.

[0054] Working principle: During door assembly, the thermally broken aluminum profile 31 serves as the main body of the door frame. The internal left and right sides are fixed with partition nylon strips 27 to block heat conduction. The steel frame 4 provides the installation foundation for the thermally broken aluminum profile 31. The two work together to enhance the structural strength of the door. The zinc-iron alloy door frame 1 has a galvanized pipe 21 fixed on the rear side, a high-temperature heat-insulating board 22 fixed on the left front end, and two zinc-iron alloy steel plates 23 fixed on the right side. Flame-retardant carbon crystal plates 24 are fixed between adjacent plates, and flame-retardant polystyrene extruded board 25 is fixed in the middle. The plates are fastened between the zinc-iron alloy steel plates 23 by fixing screws 26. The internal front side of the door frame has a galvanized pipe 32 fixed, and the left side is fixed with angle steel connectors 33 and internal expansion screws 5. The left side of the galvanized pipe 21 is connected with threaded fixing bolts 6 to reinforce and support the frame.

[0055] During installation, the internal expansion screws 5 are screwed into the left side of the zinc-iron alloy door frame 1 and penetrate into the wall to achieve a stable connection between the door frame and the wall. The fixing bolts 6 pass through the galvanized pipe 21 and connect to the adjacent components to reinforce the fireproof mechanism 2 and support the frame. The stainless steel concealed hinges 28 are fixed to the front side of the zinc-iron alloy door frame 1 and to the left side of the thermal break aluminum profile 31 on the right side to achieve flexible opening and closing of the door and maintain connection strength. Waterproof and breathable or vapor barrier membrane treatment is applied to the inner and outer openings. Thermal insulation treatment is applied around the window openings to reduce gas convection and thermal bridging.

[0056] In daily use, the thermal break structure of the aluminum profile 31 of the thermal break door leaf, together with the partition nylon strip 27, cuts off the heat conduction channel. The thickened zinc-iron alloy inner and outer door core panels, together with the special fireproof and heat-insulating material of the door and window core, reduce the overall heat transfer coefficient. The fireproof sealing strip 291 of the sealing component 29 is in close contact with the door leaf surface when the door is closed. The three sealing strips ensure the airtight function. The waterproof and breathable membrane 292 prevents moisture from seeping in while balancing the air pressure, so that the airtightness meets the national standard requirements.

[0057] In the event of a fire, galvanized pipe 21 provides structural support for fireproof mechanism 2, high-temperature resistant heat insulation board 22 directly blocks high temperature attack and slows down heat transfer, two zinc-iron alloy steel plates 23 form double-layer protection to prevent flames from penetrating directly, flame-retardant carbon crystal board 24 remains stable at high temperatures to suppress the spread of fire, flame-retardant extruded polystyrene board 25 further blocks heat conduction and forms a multi-layer fireproof and heat-insulating barrier, fixing screws 26 prevent the board from loosening and falling off at high temperatures, fireproof sealing strip 291 expands to seal gaps and prevent smoke and hot air from penetrating, and stainless steel concealed hinges 28 maintain the structural integrity of the door.

[0058] When subjected to external wind pressure, the thermally broken aluminum profile 31 and the steel frame 4 jointly bear the longitudinal force. Its 2.0mm thickness reduces its own weight while maintaining wind pressure resistance. The galvanized pipe 32 bears the lateral force. The angle steel connector 33 strengthens the connection between the door frame and the installation structure and improves the door frame's resistance to deformation. The cover plate 34 covers the edge gaps, so that the wind pressure is evenly applied to the door surface and avoids local deformation. The high-strength zinc-iron alloy door frame 1 and the lower sill are combined with various materials to improve the structural rigidity while ensuring thermal performance, so that the wind pressure resistance reaches level 9.

[0059] The stability of the fireproof mechanism 2 is ensured by the combination of galvanized pipe 21 and zinc-iron alloy steel plate 23; the fireproof and heat insulation effect is improved by the combination of flame-retardant carbon crystal plate 24 and flame-retardant polystyrene extruded board 25; the low heat transfer coefficient is achieved by the combination of thermal break structure and insulation material; the longitudinal wind pressure is resisted by the combination of thermal break door aluminum profile 31 and steel frame 4; and the airtightness is ensured by the combination of sealing component 29 and installation process, thereby improving the fire resistance, heat insulation and airtightness and wind pressure resistance of the door.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 passive thermal insulation airtight door, comprising a zinc-iron alloy door frame (1) and a steel frame (4), characterized in that: The zinc-iron alloy door frame (1) is equipped with a fireproof mechanism (2) for fire prevention, and the steel frame (4) is equipped with a pressure-resistant mechanism (3) for improving the wind pressure resistance of the doors and windows. The fireproof mechanism (2) includes a galvanized pipe (21), the rear side of which is fixedly connected to the rear side of the zinc-iron alloy door frame (1). A high-temperature heat-insulating plate (22) is fixedly connected to the left front end of the galvanized pipe (21). Two zinc-iron alloy steel plates (23) are fixedly connected to the right front end of the galvanized pipe (21). Flame-retardant carbon crystal plates (24) are fixedly connected between adjacent zinc-iron alloy steel plates (23). The same flame-retardant polystyrene extruded board (25) is fixedly connected between adjacent flame-retardant carbon crystal plates (24). A sealing component (29) is provided on the right side of the interior of the zinc-iron alloy door frame (1).

2. A passive thermal insulation airtight door according to claim 1, characterized in that: The pressure-resistant mechanism (3) includes a thermal break aluminum profile (31), the outer wall of which is fixedly connected to the inside left side of the steel frame (4), a galvanized pipe (32) is fixedly connected to the inside front left side of the zinc-iron alloy door frame (1), an angle steel connector (33) is fixedly connected to the left side of the zinc-iron alloy door frame (1), and a cover plate (34) is fixedly connected to the two zinc-iron alloy steel plates (23) on opposite sides.

3. A passive thermal insulation airtight door according to claim 2, characterized in that: The fireproof mechanism (2) also includes two fixing screws (26), which are threaded to the adjacent sides of two zinc-iron alloy steel plates (23) respectively. The inner left and right sides of the thermal break aluminum profile (31) are fixedly connected with partition nylon strips (27).

4. A passive thermal insulation airtight door according to claim 1, characterized in that: The fireproof mechanism (2) also includes a stainless steel concealed hinge (28), the front side of which is fixedly connected to the front side of the zinc-iron alloy door frame (1), and the right side of which is fixedly connected to the left side of the thermal break aluminum profile (31).

5. A passive thermal insulation airtight door according to claim 1, characterized in that: The sealing assembly (29) includes two fireproof sealing strips (291), which are fixedly connected to the front and rear sides of the zinc-iron alloy door frame (1) respectively. A waterproof and breathable membrane (292) is fixedly connected to the left side of the zinc-iron alloy door frame (1).

6. A passive thermal insulation airtight door according to claim 1, characterized in that: The left side of the zinc-iron alloy door frame (1) is threaded with an internal expansion screw (5), and the left side of the galvanized pipe (21) is threaded with a fixing bolt (6).

7. A passive thermal insulation airtight door according to claim 4, characterized in that: The thickness of the door leaf is set to 73.0MM-77.0MM, and the thickness of the thermally broken aluminum profile (31) of the door leaf is set to 1.8MM-2.2MM.

8. A passive thermal insulation airtight door according to claim 2, characterized in that: The width of the zinc-iron alloy door frame (1) is set to 128.0MM-132.0MM, and the width of the cover plate (34) is set to 36.0MM-40.0MM.

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