Heat preservation airtight door

Abstract

A heat preservation airtight door belongs to the related technical field of civil air defense equipment and comprises a main door system, the main door system comprises a main door frame arranged on a building and a main door leaf hinged to the main door frame, the main door leaf can be closed on the main door frame in an airtight mode, and a main door locking system is arranged in the main door leaf; a heat preservation cavity is formed in the main door leaf, heat preservation units are arranged in the heat preservation cavity, the heat preservation units are of strip-shaped structures, and the heat preservation units are vertically arranged and sequentially arranged in the transverse direction, or the heat preservation units are transversely arranged and sequentially arranged in the vertical direction. Through the structural design, the heat preservation unit is arranged in the door leaf and can prevent heat from being transmitted on the two sides of the door leaf, so that the door leaf has a heat preservation function. Meanwhile, the heat preservation unit is arranged in the door leaf, the structural strength of the door leaf can be improved, and the structural stability of the door leaf is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to civil air defense equipment, and more specifically, particularly relates to a heat-insulating airtight door. Background Art

[0002] Existing civil air defense door panels are mostly made of reinforced concrete or steel structure. For reinforced concrete door panels, the weight of the reinforced concrete door panels is large, the crack resistance of the door panels is poor, and the heat insulation and sound insulation performance of the door panels are also poor. For steel structure door panels, the door panels have poor corrosion resistance and are prone to rust in environments with high humidity and corrosive media.

[0003] In addition, there is another type of civil air defense door in the prior art, whose door leaf is made of glued honeycomb panels, so that the weight of the door leaf is lighter and the overall strength of the door leaf is also increased. However, the honeycomb panel is made of folded strips and then glued together, so this honeycomb panel is not easy to process and cannot be welded. If the honeycomb panel door leaf is welded, the glue of the honeycomb panel layer will melt after being heated, thereby cracking the honeycomb structure of the honeycomb panel layer. In addition, the traditional closed door is a metal door, which does not have any insulation structure, so that the closed door does not have the insulation function. Utility Model Content

[0004] 1. Technical issues

[0005] In summary, how to provide a new type of civil airtight door that has the advantages of thermal insulation performance, high strength, good stability, etc. has become an urgent problem to be solved by technical personnel in this field.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a heat-insulating airtight door. In the utility model, the heat-insulating airtight door comprises:

[0009] A main door system, the main door system comprising a main door frame for being installed on a building structure and a main door leaf hinged on the main door frame, the main door leaf being airtightly closed on the main door frame, and a main door locking system being arranged in the main door leaf;

[0010] An insulation chamber is formed in the main door leaf, and an insulation unit is arranged in the insulation chamber. The insulation unit is a strip structure, and the insulation unit is arranged vertically and arranged in sequence along the horizontal direction, or the insulation unit is arranged horizontally and arranged in sequence along the vertical direction.

[0011] Preferably, in the heat-insulating airtight door provided by the present invention, the heat-insulating unit abuts against the front inner side surface of the main door leaf and the rear inner side surface of the main door leaf.

[0012] Preferably, in the heat-insulating sealed door provided by the present invention, a partition component is provided in the heat-insulating chamber, and the partition component divides the heat-insulating chamber into a plurality of small cavities, and each of the small cavities is provided with an heat-insulating unit and is completely filled with the heat-insulating unit.

[0013] Preferably, in the heat-insulating and airtight door provided by the present invention, the spacing component is a hollow steel tube, and the spacing component abuts against the front inner side surface of the main door leaf and the rear inner side surface of the main door leaf.

[0014] Preferably, the thermally insulated and sealed door provided by the present invention further includes a secondary door system; a secondary door opening is arranged on the main door leaf, the secondary door system includes a secondary door leaf, the secondary door leaf is hinged on the main door leaf, the secondary door leaf can be airtightly closed on the main door leaf, and a secondary door locking system is arranged on the secondary door leaf; the secondary door leaf is filled with the thermal insulation unit.

[0015] Preferably, in the thermally insulated and sealed door provided by the present invention, a partition plate is arranged inside the main door leaf, and the partition plate is vertically arranged and divides the internal space of the main door leaf into two independent chambers, one of the chambers is the thermal insulation chamber, and the other chamber is the installation chamber, and the main door locking system is arranged in the installation chamber.

[0016] Preferably, in the thermal insulation and airtight door provided by the utility model, the main door leaf includes two, and the two main door leafs are of a double-opening structure; a sealing strip is provided on one of the main door leafs, and the door edge of the other main door leaf can be abutted against the sealing strip to achieve an airtight connection between the two main door leafs after closing; along the opening direction of the main door leaf; a mounting component is provided on the one of the main door leafs provided with the sealing strip, the mounting component is provided on the outer side edge of the main door leaf and close to the rear side position of the main door leaf, and the sealing strip is fixedly provided on the mounting component; a matching component and a pressing component are provided on the other main door leaf, the matching component is provided on the outer side edge of the main door leaf and close to the rear side position of the main door leaf, the matching component can be airtightly abutted against the sealing strip, and the pressing component is provided on the front side of the matching component to cover the abutting connection between the matching component and the sealing strip.

[0017] Preferably, in the heat-insulating airtight door provided by the utility model, the sealing strip and the matching component are matched with each other in an inclined plane; and the press-fitted component is a hollow square tube.

[0018] Preferably, in the thermally insulated and sealed door provided by the present invention, a main door frame mounting groove is provided on the main door frame, a main door seal is provided in the main door frame mounting groove, and the main door seal can offset the air tightness of the main door leaf in a closed state; an installation edge is provided around the outer edge of the auxiliary door leaf, an auxiliary door leaf mounting groove is provided on the installation edge, and an auxiliary door seal is provided in the auxiliary door leaf mounting groove, and the auxiliary door seal can offset the air tightness of the auxiliary door frame when the auxiliary door leaf is in a closed state.

[0019] Preferably, in the heat-insulating sealed door provided by the present invention, the heat-insulating unit is a foam aluminum profile component; the outer contour shape of the heat-insulating unit is consistent with the shape of the cavity in which it is located.

[0020] (III) Beneficial effects

[0021] The utility model provides a heat-insulating airtight door, which includes: a main door system, the main door system includes a main door frame for being set on a building and a main door leaf hinged on the main door frame, the main door leaf can be airtightly closed on the main door frame, and a main door locking system is arranged in the main door leaf; a heat-insulating chamber is formed in the main door leaf, and a heat-insulating unit is arranged in the heat-insulating chamber, the heat-insulating unit is a strip structure, the heat-insulating unit is vertically arranged and arranged in sequence along the horizontal direction, or, the heat-insulating unit is horizontally arranged and arranged in sequence along the vertical direction. Through the above-mentioned structural design, the utility model arranges a heat-insulating unit in the door leaf, which can block the heat from being transferred on both sides of the door leaf, so that the door leaf has a heat-insulating function. At the same time, the heat-insulating unit is arranged inside the door leaf, which can also improve the structural strength of the door leaf and improve the structural stability of the door leaf. The utility model can change the thickness and weight of the product according to customer requirements by changing the thickness of the metal plate layer and the foam aluminum profile and the closed holes of different sizes, thereby achieving different civil defense levels. The thermal insulation and airtight door provided by the utility model can be used as the entrance and exit doors of civil defense projects and other protective doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0023] Figure 1 This is a schematic diagram of the structure of the heat-insulating airtight door in the embodiment of the utility model;

[0024] Figure 2It is a schematic diagram of the transverse cross-sectional structure of the heat-insulating airtight door in the embodiment of the utility model;

[0025] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at the middle box A;

[0026] Figure 4 for Figure 2 A schematic diagram of the structure enlarged in the middle box B;

[0027] Figure 5 This is a schematic diagram of the partial structure of the main door leaf in one embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of the partial structure of the main door leaf in another embodiment of the utility model.

[0029] exist Figures 1 to 6 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0030] Main door frame 1, main door leaf 2, main door locking system 3, auxiliary door leaf 4,

[0031] Auxiliary door locking system 5, sealing strip 6, mounting component 7, matching component 8, press-fitting component 9, sealing edge 10, auxiliary door seal 11, insulation unit 12, spacing component 13, partition plate 14,

[0032] Embedded nuts 15, bolts 16, door leaf side panels 17, and bolt assemblies 18. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0034] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Please refer to Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the structure of the heat-insulating airtight door in the embodiment of the utility model; Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the heat-insulating airtight door in the embodiment of the utility model;

[0036] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at the middle box A; Figure 4 for Figure 2 An enlarged schematic diagram of the structure at box B.

[0037] The utility model provides a heat-insulating sealed door, which is a double-door system, namely, it includes a main door system and a secondary door system, the secondary door leaf of the secondary door system is arranged on the main door leaf, based on this structure, the utility model ingeniously arranges a heat-insulating structure (namely, a heat-insulating unit 12) inside the main door leaf 2 and the secondary door leaf 4.

[0038] Specifically, the heat-insulating airtight door provided by the utility model includes a main door system, which includes a main door frame 1 and a main door leaf 2 hinged on the main door frame 1. The main door leaf 2 can be airtightly closed on the main door frame 1. A main door locking system 3 is arranged inside the main door leaf 2. The main door locking system 3 is a multi-link locking system, and the main door locking system 3 can be locked and opened by a hand wheel arranged on the main door leaf 2. The main door locking system 3 can be arranged inside the main door leaf 2. For this structural form, any structure inside the main door leaf 2 cannot affect the movement of the main door locking system 3, so that locking and opening can be smoothly achieved. The main door locking system 3 can also be set on the outside of the main door leaf 2 (this structure is more common). In this way, it is only necessary to reserve a hole structure on the main door leaf 2 to install shaft components, so that the main door locking system 3 can be installed on the main door leaf 2. At the same time, this structure assembled on the outside of the main door leaf 2 can also simplify the complexity of the internal structure of the main door leaf 2.

[0039] In the present invention, the main door leaf 2 is composed of a frame (metal frame) and a panel (metal panel), and a heat preservation chamber is formed in the main door leaf 2, and a heat preservation unit 12 is arranged in the heat preservation chamber (the heat preservation unit 12 is made of a fireproof, high temperature resistant material with heat preservation function, preferably a foam aluminum profile), and the heat preservation unit 12 is a strip structure (this structural design facilitates the assembly of the heat preservation unit 12 inside the main door leaf 2). Inside the main door leaf 2, the heat preservation unit 12 has two assembly forms: the first, the heat preservation unit 12 is arranged vertically and arranged in sequence along the horizontal direction; the second, the heat preservation unit 12 is arranged horizontally and arranged in sequence along the vertical direction. As mentioned above, after the heat preservation unit 12 is installed inside the main door leaf 2, the utility model shall not affect the movement of the main door locking system 3.

[0040] An insulation unit 12 is installed in the main door leaf 2, and the insulation unit 12 is against the front inner side of the main door leaf 2 and the rear inner side of the main door leaf 2. That is, the insulation unit 12 is filled inside the main door leaf 2 to the maximum extent without affecting the movement of the main door locking system 3, thereby improving the insulation performance of the main door leaf 2.

[0041] The insulation unit 12 used in the present invention is relatively small in size (relative to the main door leaf 2, a plurality of insulation units 12 need to be installed inside a main door leaf 2, ranging from a few to more than a dozen), while the insulation chamber space inside the main door leaf 2 is relatively large. If a large number of insulation units 12 are installed, under the effects of gravity, the rotational inertia of the door leaf, etc., there will be misalignment between the insulation units 12. In order to ensure the stability of the insulation unit 12 installed in the main door leaf 2, the present invention is provided with a spacing component 13 in the insulation chamber, and the insulation chamber can be divided into a plurality of small cavities by the spacing component 13. Each small cavity is provided with an insulation unit 12, and the insulation unit 12 completely fills the small cavity in which it is located. Specifically, the spacer component 13 is a hollow steel pipe, and the spacer component 13 is offset against the front inner side surface of the main door leaf 2 and the rear inner side surface of the main door leaf 2. The spacer component 13 adopts a hollow steel pipe structure, which can improve the structural strength of the main door leaf 2 (the spacer component 13 can be used as a reinforcement structure for the skeleton of the main door leaf 2), and can also divide the interior of the main door leaf 2 to ensure the stability of the insulation unit 12. At the same time, the hollow structure setting can also effectively control the overall weight of the main door leaf 2.

[0042] As can be seen from the above, the main door leaf 2 is provided with a main door locking system 3, and the main door locking system 3 is arranged outside the main door leaf 2, which can simplify the complexity of the internal structure of the main door leaf 2. However, the main door locking system 3 is arranged outside the main door leaf 2, which is easy to cause damage to the main door locking system 3 (it has a weak ability to withstand external impact, and once it is hit, it will cause damage to the main door locking system 3). Therefore, the main door locking system 3 is arranged inside the main door leaf 2 to protect the main door locking system 3. However, the main door locking system 3 is arranged inside the main door leaf 2, which will increase the difficulty of filling the insulation unit 12 inside the main door leaf 2. In order to solve this problem and simplify the difficulty of filling the insulation unit 12, the utility model provides a partition plate 14 in the main door leaf 2. The partition plate 14 is vertically arranged and divides the internal space of the main door leaf 2 into two independent chambers, one of which is an insulation chamber, and the other is an installation chamber. The main door locking system 3 is arranged in the installation chamber. In this way, although the main door locking system 3 and the insulation unit 12 are both arranged in the main door leaf 2, the main door locking system 3 and the insulation unit 12 are isolated by the partition plate 14 and do not affect each other.

[0043] In the present invention, an auxiliary door leaf 4 is arranged on the main door leaf 2. The structural design concept of the auxiliary door leaf 4 is basically consistent with the design concept of the main door leaf 2, and will not be described in detail here.

[0044] In the present invention, the heat preservation unit 12 is a foam aluminum profile component; the outer contour shape of the heat preservation unit 12 is consistent with the shape of the cavity in which it is located.

[0045] In the utility model, the foam aluminum profile, i.e., the foam aluminum alloy, is arranged as the insulation unit 12 in the door leaf (inside the main door leaf 2 and the auxiliary door leaf 4). The door leaf provided with the insulation unit 12 has a total of five layers, which are arranged in sequence as the front skin panel, the foam aluminum alloy core plate (i.e., the insulation unit 12), the middle plywood (partitioning plate 14), the foam aluminum alloy core (another layer of insulation unit 12), and the rear skin panel. The foam aluminum alloy core plate (foam aluminum profile, i.e., the insulation unit 12) is formed by folding and welding the strips, and the cross-section of the foam aluminum alloy core is a closed hole of different sizes. The middle plywood is located in the middle layer, and the two sides of the middle plywood are respectively welded to one side of the two layers of the foam aluminum alloy core plate, and the middle plywood can make the foam aluminum alloy core plate more firmly fixed. The other sides of the two layers of foam aluminum alloy core plates are welded to the inner surfaces of the two layers of skin panels respectively. The cross-section of the foam aluminum alloy core plate is a hole-shaped shape of different sizes. This layered structure has large holes and light weight, small holes and heavy weight, good bending resistance and anisotropy, good firmness between layers, high safety performance, good secondary processing performance, and sound absorption and heat insulation effects. The side of the door leaf of the foam aluminum alloy structure civil air defense door is provided with a edging to facilitate the installation of hinges. The door leaf of the foam aluminum alloy structure civil air defense door is equipped with a handle, a linkage lock and a hinge. The linkage lock is installed on a mounting seat, and the mounting seat is welded to the foam aluminum alloy composite plate. The linkage lock is arranged on one side of the door leaf. The linkage lock includes a plurality of connecting rods arranged around the door leaf, and each connecting rod is connected by a swing arm at the corner of the door leaf. The middle of the swing arm is arranged in the mounting seat through a fixed shaft, and the two ends of the swing arm are respectively hinged with one end of the two connecting rods through a pin shaft, and locks are also arranged on the multiple connecting rods around. The middle of the lock is arranged in the mounting seat through a fixed shaft, one end of the lock is hinged with the connecting rod through a pin shaft, and the other end is suspended and can rotate freely. The handle is arranged on the other side of the door leaf, and the handle can be divided into an inner handle and an outer handle. The inner handle and the outer handle are arranged on both sides of the door leaf through a lock shaft, and one end of the inner handle is hinged with the connecting rod through a pin shaft. A flat key is arranged between the inner handle and the lock shaft. Multiple lock holes are designed on the upper, lower, left and right sides of the door frame. When the door leaf is locked and closed, the reaction force of the embedded pressure strip on the door leaf to compress the sealing strip 6 is minimized. The utility model is provided with an insulation unit 12 inside the door leaf of the closed door. Furthermore, the insulation unit 12 is a foam aluminum profile, which can reduce the overall weight of the closed door and save the raw materials for manufacturing the door leaf. The insulation unit 12 in the utility model is a pure metal structure, which can be welded twice, can be processed, has high strength, high rigidity, and good stability. Moreover, the foam aluminum alloy structure of the civil air defense door of the utility model can be completely recycled and reused, and is convenient for reprocessing.

[0046] Please refer to Figure 5 and Figure 6 ,in, Figure 5 This is a schematic diagram of the partial structure of the main door leaf in one embodiment of the utility model; Figure 6 It is a schematic diagram of the partial structure of the main door leaf in another embodiment of the utility model.

[0047] The utility model provides a heat preservation unit 12 (foam aluminum profile) in a door leaf (including a main door leaf 2 and a secondary door leaf 4). The heat preservation unit 12 is clamped in the door leaf (against the front inner wall and the rear inner wall of the door leaf). The heat preservation unit 12 has the following three fixing methods: 1. welding, that is, the heat preservation unit 12 is welded inside the door leaf; 2. pre-embedded bolt connection, that is, a nut 15 is pre-embedded on the inner wall of one side of the door leaf, and a bolt 16 is arranged through the other side wall of the door leaf and the heat preservation unit 12. The bolt 16 cooperates with the pre-embedded nut 15 to achieve the reinforcement of the door leaf structure and the fixed installation of the heat preservation unit 12 inside the door leaf; 3. bolt assembly connection, that is, a bolt assembly 18 is arranged through the door leaf (holes are punched on the door leaf side plate 17 and the heat preservation unit 12 to form a through-hole structure on the door leaf) (the nut is located on the outer side of the door leaf and does not need to be pre-embedded), and the bolt assembly 18 is used to achieve the reinforcement of the door leaf structure and the fixed installation of the heat preservation unit 12 inside the door leaf.

[0048] As can be seen from the above, the utility model provides a heat-insulating airtight door, which includes: a main door system, the main door system includes a main door frame 1 for being set on a building and a main door leaf 2 hinged on the main door frame 1, the main door leaf 2 can be airtightly closed on the main door frame 1, and a main door locking system 3 is arranged in the main door leaf 2; a heat-insulating chamber is formed in the main door leaf 2, and a heat-insulating unit 12 is arranged in the heat-insulating chamber, and the heat-insulating unit 12 is a strip structure, and the heat-insulating unit 12 is arranged vertically and arranged in sequence along the horizontal direction, or, the heat-insulating unit 12 is arranged horizontally and arranged in sequence along the vertical direction. Through the above-mentioned structural design, the utility model arranges a heat-insulating unit 12 in the door leaf, which can block the heat from being transferred on both sides of the door leaf, so that the door leaf has a heat-insulating function. At the same time, the heat-insulating unit 12 is arranged inside the door leaf, which can also improve the structural strength of the door leaf and improve the structural stability of the door leaf. The utility model can change the thickness and weight of the product according to customer requirements by changing the thickness of the metal plate layer and the foam aluminum profile and the closed holes of different sizes, thereby achieving different civil defense levels. The thermal insulation and airtight door provided by the utility model can be used as the entrance and exit doors of civil defense projects and other protective doors.

[0049] The utility model provides a heat-insulating airtight door. In a preferred structure of the utility model, the heat-insulating airtight door includes a main door system (main door) and a secondary door system (small door) arranged on the main door system, wherein the main door system is used to close a doorway or passage reserved for a building, and the secondary door system is used to realize rapid opening and closing on a main door leaf 2 after the main door system is closed.

[0050] In the utility model, for the main door system, its structure is as follows: the main door system includes a main door frame 1 for being set on a building structure and a main door leaf 2 hinged on the main door frame 1, the main door leaf 2 can be airtightly closed on the main door frame 1, a main door locking system 3 is arranged in the main door leaf 2, and a secondary door opening is arranged on the main door leaf 2.

[0051] The main door frame 1 is a steel structure door frame, which is used to be set on the doorway or in the passage of the building, and can be fixed to the building by anchor bolts, etc., and then the main door frame 1 can be fixed and sealed on the building by gluing or filling cement. The utility model also provides a hinge assembly for installing the main door leaf 2 on the main door frame 1, and a lock hole is reserved on the main door frame 1 for inserting the bolt of the main door locking system 3, so as to realize the locking of the main door leaf 2 on the main door frame 1.

[0052] As for the hinge assembly, in one embodiment of the utility model, three hinge assemblies are used for a main door leaf 2, one of which is a limit hinge assembly, and the other two are support hinge assemblies. As for the limit hinge assembly, it includes a lower support member and an upper support member, the lower support member is spaced apart from the upper support member, a friction plate is provided on each side opposite to the upper support member, a door shaft is vertically provided on the upper support member and the lower support member, a support arm is provided on the door shaft, the support arm is stuck between the two friction plates and fits tightly with the friction plates, an axis hole is provided on the support arm, and the axis hole fits tightly with the door shaft, so that the support arm is installed between the upper support member and the lower support member, fits tightly with the upper support member and the lower support member, and cannot shake (can only rotate), which plays a limiting role in the installation of the main door leaf 2. The supporting hinge assembly has the same general structure as the position-limiting hinge assembly, except that the friction plate on the lower support is replaced with a bearing (ball bearing) in the supporting hinge assembly, and the support arm and the bearing cooperate to improve the smoothness of the rotation of the support arm. The three hinge assemblies are arranged at intervals on the main door frame 1 on the same side (arranged in sequence from top to bottom), and the position-limiting hinge assembly is arranged on the two supporting hinge assemblies.

[0053] The main door locking system 3 provided by the utility model mainly includes a hand wheel, a connecting rod, a steering member and a bolt, wherein the steering member is a transmission member installed inside the main door leaf 2 and can rotate around the inner door shaft (the inner door shaft is an shaft arranged inside the main door leaf 2 and used to install the steering member). For the installation position of the steering member inside the main door leaf 2, specific reference can be made to the structure and size of the bolt and the connecting rod, and the design standard is that the connecting rod can drive the steering member to rotate, and the steering member can drive the bolt to rotate and insert into the lock hole. The bolt is fixedly arranged relative to the steering member, and preferably, the bolt and the steering member are integrally formed. At least two steering members are arranged on the same side of the main door leaf 2 (that is, there are at least two bolts on the same side of the main door leaf 2), so that a multi-link linkage structure can be formed by hingedly connecting multiple steering members to the same connecting rod, and the hand wheel is connected to the connecting rod, and the connecting rod can drive the steering member to link. The main door leaf 2 is generally a rectangular structure, and steering components are provided corresponding to the side, top and bottom sides of the main door leaf 2, and the connecting rods on two adjacent sides are connected by the steering components located at the corners.

[0054] The main door leaf 2 includes a main door leaf frame (metal frame), and metal skins are arranged on the front and back of the main door leaf frame. The main door locking system 3 is arranged inside the main door leaf 2. If the main door leaf frame affects the movement of the main door locking system 3, holes or grooves can be opened on it.

[0055] The heat-insulating and airtight door provided by the utility model is mainly used in large-sized doorways or passages, so the main door leaf 2 is generally provided with two leaves. The main door leaf 2 includes two leaves, and the two main door leaves 2 are of a double-leaf structure, that is, the two main door leaves 2 can be respectively rotated to the left and to the right to open in a closed state. Among the two main door leaves 2, a sealing strip 6 is provided on one of the main door leaves 2 (one side of the main door leaf 2 is fixedly connected to the support arm, and the other side of the main door leaf 2 is provided with a sealing strip 6, specifically, the sealing strip 6 is provided on the side surface of the main door leaf 2), and the door edge of the other main door leaf 2 can be against the sealing strip 6 to achieve an airtight connection between the two main door leaves 2 after closing.

[0056] To facilitate structural description, the utility model defines one direction, namely: along the opening direction of the main door leaf 2 (namely, the main door leaf 2 is opened in a closed state). The utility model is provided with a mounting component 7 on a main door leaf 2 provided with a sealing strip 6. The mounting component 7 is arranged on the outer edge of the main door leaf 2 and close to the rear side surface of the main door leaf 2. The main door leaf 2 is an inward-opening type, and the main door leaf 2 has an outer side surface (namely, the above-mentioned rear side surface). The mounting component 7 is arranged on the side surface of the main door leaf 2 (namely, the above-mentioned outer edge) and close to the outer side surface of the main door leaf 2. The mounting component 7 is a metal component. The length of the mounting component 7 is consistent with the height of the main door leaf 2. The mounting component 7 is fixedly arranged on the main door leaf 2, and the sealing strip 6 is fixedly arranged on the mounting component 7. A matching component 8 (the main function of the matching component 8 is to abut against the sealing strip 6 to ensure the sealing of the two main door leaves 2 after closing) and a pressing component 9 (used to cover the gap where the sealing strip 6 contacts the matching component 8 after the two main door leaves 2 are closed) are provided on the other main door leaf 2. The matching component 8 is provided on the outer edge of the main door leaf 2 and close to the rear side of the main door leaf 2 (after the two main door leaves 2 are closed, the matching component 8 corresponds to the sealing strip 6). The matching component 8 can abut against the sealing strip 6 for airtightness (there can be a certain pressure between the matching component 8 and the sealing strip 6, that is, the matching component 8 applies a certain pressure to the sealing strip 6, thereby improving the airtightness of the two main door leaves 2). The pressing component 9 is provided on the front side of the matching component 8 to cover the abutting connection between the matching component 8 and the sealing strip 6. The structure of the pressing component 9 will not affect the opening and closing of the two main door leaves 2.

[0057] Furthermore, the sealing strip 6 and the matching component 8 are matched with an inclined surface, and the use of the inclined surface matching method can increase the contact area between the sealing strip 6 and the matching component 8, thereby improving the air tightness. The press-fit component 9 is a hollow metal square tube, and a sealing edge 10 is provided on the front side of the press-fit component 9, which is used to close the connection between the two main door leaves 2 after the main door leaf 2 is closed. The sealing edge 10, the press-fit component 9 and the matching component 8 can form a structure similar to a step. After the two main door leaves 2 are closed, the sealing edge 10 can close the door gap of the two main door leaves 2, and the press-fit component 9 can close the connection seam between the matching component 8 and the sealing strip 6. The matching component 8 and the sealing strip 6 can ensure the air tightness after the two main door leaves 2 are closed.

[0058] The utility model also provides a mounting member 7 on the main door leaf 2, and the mounting member 7 is used for fixing and installing the sealing strip 6 on the main door leaf 2. The mounting member 7 can be installed on the main door leaf 2 by bolts, or can be fixed on the main door leaf 2 by welding. Specifically, the mounting member 7 is in the shape of a long strip (the mounting member 7 is a long straight member), an L-shaped member (the mounting member 7 is cross-cut, and the section is L-shaped), and the sealing strip 6 is fixedly installed (can be fixed by bolts, or can be fixed by strong adhesive) on the inner side of the mounting member 7. Furthermore, a reinforcement strip is provided on the inner side of the mounting member 7 (the reinforcement strip and the mounting member 7 are an integrally formed structure), and a reinforcement groove is provided on the sealing strip 6 to be plugged and matched with the reinforcement strip. The reinforcement strip is provided to cooperate with the sealing strip 6 to improve the firmness of the sealing strip 6 on the mounting member 7.

[0059] The utility model is provided with a main door frame 1 mounting groove on the main door frame 1, and a main door seal (consistent with the material of the above-mentioned sealing strip 6) is provided in the main door frame 1 mounting groove, and the main door seal can offset the airtightness of the main door leaf 2 in the closed state. Specifically, the utility model is provided with a square tube structure on the outer side, top side and bottom side of the main door leaf 2, and the square tube structure is provided corresponding to the main door seal. After the main door leaf 2 is closed, the square tube structure can press the main door seal, thereby ensuring the airtightness between the main door leaf 2 and the main door frame 1 after the main door leaf 2 is closed.

[0060] In the present invention, for the auxiliary door system, its structure is as follows: the auxiliary door system includes an auxiliary door leaf 4, the auxiliary door leaf 4 is hinged on the main door leaf 2, the auxiliary door leaf 4 can be airtightly closed on the main door leaf 2, and an auxiliary door locking system 5 is arranged on the auxiliary door leaf 4. The utility model is provided with an auxiliary door opening on the main door leaf 2, and a hinge assembly is arranged at a side position of the main door leaf 2 located at the auxiliary door opening. The hinge assembly used for installing the auxiliary door leaf 4 in the utility model also includes a limited hinge assembly and a supporting hinge assembly. Its specific structure can refer to the above-mentioned hinge assembly used to install the main door leaf 2, and it will not be repeated here. Since the size of the auxiliary door leaf 4 is small, the utility model only sets a limited hinge assembly and a supporting hinge assembly to install the auxiliary door leaf 4. Furthermore, the auxiliary door leaf 4 is consistent with the rotation direction of the main door leaf 2 used to install the auxiliary door leaf 4.

[0061] The auxiliary door leaf 4 is installed on the main door leaf 2. After the auxiliary door leaf 4 is closed, a high degree of airtightness should be maintained between it and the main door leaf 2. For this purpose, the present invention proposes the following structural design: an auxiliary door frame is arranged on the main door leaf 2 and around the auxiliary door opening. The auxiliary door frame is a metal door frame structure. The auxiliary door frame is arranged on the main door leaf 2 and is welded to the metal frame of the main door leaf 2. The auxiliary door leaf 4 can be airtightly closed on the auxiliary door frame. Specifically, an installation edge is arranged around the outer edge of the auxiliary door leaf 4. The installation edge extends outward along the outer surface of the auxiliary door leaf 4. An auxiliary door leaf 4 installation groove is arranged on the installation edge. An auxiliary door seal 12 (the material of the above-mentioned sealing strip 6) is arranged in the auxiliary door leaf 4 installation groove. The auxiliary door seal 12 can be airtightly offset against the auxiliary door frame when the auxiliary door leaf 4 is closed. Furthermore, a secondary door frame densification strip that can abut against the secondary door seal 12 is provided on the secondary door frame. The secondary door frame densification strip is a rib structure protruding relative to the outer side of the main door leaf 2. After the secondary door leaf 4 is closed, the secondary door frame densification strip can be pressed on the secondary door seal 12, thereby achieving airtight closure of the secondary door leaf 4 on the main door leaf 2. The secondary door frame densification strip can be set as one or two (two parallel and spaced). The surface of the secondary door frame densification strip abutting against the secondary door seal 12 is a smooth curved surface or a flat surface.

[0062] The utility model provides a secondary door locking system 5 on the secondary door leaf 4. The secondary door locking system 5 is similar in structure to the main door locking system 3 of the utility model. The difference is that the secondary door locking system 5 is provided with a smaller number of bolts and is only provided on both sides of the secondary door leaf 4.

[0063] The technical requirements of the utility model are as follows: the main door frame 1 is fixed to the doorway of the building and reinforced (sealed) by pouring concrete. After the main door frame 1 is fixed, the door frame angle steel plane should be plumb, and the verticality tolerance of the front, back, left and right is 2.5 mm. The temporary support angle steel can be removed only after the mold is removed. The metal parts of the utility model (main door frame 1, main door leaf 2, auxiliary door leaf 4, etc.) should be prevented from deformation during transportation and installation. The exposed metal surface should be painted with two coats of anti-rust paint and two coats of white topcoat.

[0064] It can be seen from the above structural design that the utility model provides a heat-insulating and airtight door, which includes: a main door system, the main door system includes a main door frame 1 for being set on a building and a main door leaf 2 hinged on the main door frame 1, the main door leaf 2 can be airtightly closed on the main door frame 1, a main door locking system 3 is arranged in the main door leaf 2, and an auxiliary door opening is arranged on the main door leaf 2; an auxiliary door system, the auxiliary door system includes an auxiliary door leaf 4, the auxiliary door leaf 4 is hinged on the main door leaf 2, the auxiliary door leaf 4 can be airtightly closed on the main door leaf 2, and the auxiliary door locking system 5 is arranged on the auxiliary door leaf 4. Through the above-mentioned structural design, the utility model creatively arranges a small door structure on the door leaf of a large-sized enclosed door, that is, the auxiliary door leaf 4 of the utility model. Due to the arrangement of the small door structure, the auxiliary door leaf 4 can be quickly opened in an emergency. The utility model solves the problems of difficulty in opening and closing and inability to achieve rapid opening of traditional large-sized enclosed doors.

[0065] Based on the above-mentioned heat-insulating airtight door, the present invention also provides a method for making a heat-insulating airtight door. The present invention provides a method for making a heat-insulating airtight door. In the present invention, the method for making a heat-insulating airtight door comprises the following steps:

[0066] Step 1: Make civil defense door leaves (main door leaf 2 and auxiliary door leaf 4).

[0067] The utility model uses foamed aluminum as the main material for making the door leaf of the civil air defense door (a heat preservation unit is set between the two panels). The foamed aluminum material is a porous metal material made by adding additives to pure aluminum or aluminum alloy and undergoing a foaming process. The foamed aluminum has the characteristics of both metal and bubble materials. The foamed aluminum material has the characteristics of low density, high impact absorption, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, high forming accuracy, and surface coating. The advantages of this material are: excellent physical properties, chemical properties, etc.; performance characteristics: light weight, high specific stiffness, etc.; structural characteristics: larger pore size, large specific surface area, etc. In order to ensure the structural strength of the door leaf, the utility model sets a structural reinforcement part on the front and back sides of the foamed aluminum (the structural reinforcement part uses a metal plate, such as a stainless steel plate).

[0068] Specifically, the utility model uses two aluminum alloy sheets or stainless steel sheets as panels, a metal frame can be set between the two panels to ensure that a predetermined gap is maintained between the two panels (at the same time, the metal frame can also improve the overall structural strength of the door leaf of the civil air defense door), and a foamed aluminum material is filled between the two panels to form a sandwich structure door leaf production original plate. In order to ensure the stability of the foamed aluminum material filled between the two panels, the utility model can set reinforcing ribs or reinforcing ribs on the inner side of the panel, and the reinforcing ribs or reinforcing ribs can be used to increase the firmness of the foamed aluminum material between the panels.

[0069] After preparing the original door leaf production board, cut the original door leaf production board according to the size and shape of the hole where the civil air defense door needs to be installed. Generally, the door leaf is a rectangular door leaf structure. According to the installation requirements of the door lock system of the civil air defense door, holes are opened on the original door leaf production board for installing the door lock system, and then the cut and punched original door leaf production board is hemmed to form the door leaf of the civil air defense door.

[0070] After the door leaf is cut, it is necessary to edge the civil air defense door leaf. The edge-binding steps are as follows: select thin steel plates as the edge-binding material, and after preliminary cutting into strips, use the long steel plates as the material to fold them according to the thickness of the side of the civil air defense door leaf to form a profile with a U-shaped cross section, so that the profile can be stuck on the side (two sides and upper and lower sides) of the civil air defense door leaf. After the long steel plate is bent and formed, the folded steel plate is sheared for the second time according to the edge length of the civil air defense door leaf, and an edge-binding section with the same length as the two sides and upper and lower sides of the civil air defense door leaf is formed. Then the edge-binding section is sheared for the third time, that is, the two ends of the edge-binding section are cut at 45°, and used for the butt joint of the top edge and side edge of the civil air defense door leaf.

[0071] Furthermore, the edge of the civil air defense door leaf is shaped, and the edge of the civil air defense door leaf is folded outward to form a sealing edge, and the sealing edge can be against the sealing strip after the civil air defense door leaf is closed. The edge of the civil air defense door leaf is a steel one-piece molding structure, which can ensure the structural strength of the edge. After the edge is clamped onto the side of the civil air defense door leaf, the edge can be fixed by setting bolts or rivets, or by welding.

[0072] The utility model is provided with a door lock system on the door leaf of the civil air defense door. In order to be able to install the door lock system, the utility model performs hole drilling processing on the door leaf in step one, and an annular hole sealing structure is provided on the holes opened on the original plate for making the door leaf. Specifically, the hole sealing structure is made of steel material.

[0073] The utility model provides a door lock system on the door leaf of a civil air defense door. The door lock system includes a linkage rod, various shaft components and a bolt. The shaft structure is first fixed at the position where the bolt needs to be installed on the door leaf of the civil air defense door. The front end portion and the rear end portion of the bolt form an obtuse angle structure. A sliding hole is provided on the rear end portion of the bolt. The corner of the bolt (the corner formed by the front end portion and the rear end portion) is rotatably installed on the above-mentioned shaft structure. A slider is provided on the linkage rod. The slider is slidably matched with the sliding hole. A plurality of bolts are provided on the same side of the door leaf of the civil air defense door. The bolts on the same side are matched with the same linkage rod to realize linkage. The linkage rods provided on the adjacent two sides of the door leaf of the civil air defense door are linked by a T-shaped member. The T-shaped member is installed on the door leaf of the civil air defense door through the shaft structure, and both ends are hinged with the linkage rod.

[0074] Specifically, in step one, when installing the door lock system, the door lock system adopts a linkage locking mechanism, the door lock system is connected to the inner thread of the civil air defense door leaf through a thread and coated with a thread fastener, grease is applied to the surface of the active friction parts of the door lock system, and gaskets and / or washers can be set at the installation location of the shaft components of the door lock system to adjust the gap.

[0075] Step 2: Make the door frame of the civil defense door.

[0076] The door frame of the civil air defense door is a structure fixedly installed at the passage opening, and is also used for the installation of door leaves. Therefore, it is necessary to maintain a high degree of installation firmness on the building, and at the same time, it should have reliable sealing between the civil air defense door leaves.

[0077] Before installing the door frame of the civil air defense door, you first need to process the opening of the building, specifically to ensure the flatness of the edge of the opening. If it is not flat, you can use concrete slurry to fill it, and then drill holes in the building according to the location of the expansion bolts set on the door frame of the civil air defense door. After completing the above operations, the door frame of the civil air defense door is made: L-shaped steel profiles (L-shaped steel profiles are long straight steel profiles with an L-shaped cross-section) are used as door frame materials. According to the size and shape of the opening where the civil air defense door needs to be installed, the door frame materials are cut and formed into multiple sections. Each section is installed to the edge of one side of the opening where the civil air defense door leaf is set. The door frame materials of each section are fixed and installed by expansion bolts, and the door frame materials at the adjacent ends are offset. The above-mentioned can realize the fixed installation of the civil defense door frame. In order to meet the sealing contact between the civil defense door leaf and the civil defense door frame after closing, the utility model also includes the step of making a sealing structure in step two: a sealing structure is set on the side of the civil defense door frame used to resist the civil defense door leaf, wherein the sealing structure includes a flat block structure and an oblique block structure, the flat block structure is welded and fixed perpendicular to the outer side surface of the civil defense door frame, the oblique block structure is inclined relative to the outer side surface of the civil defense door frame and welded and fixed, the flat block structure and the oblique block structure form a closing structure, and the sealing strip is assembled between the flat block structure and the oblique block structure. The opening formed between the flat block structure and the oblique block structure can be used for the civil defense door leaf to resist the sealing strip after closing.

[0078] In the utility model, the sealing strip is sponge rubber, which is in the shape of a long strip with four side surfaces. One of the side surfaces is the rear back, which abuts against the door frame of the civil defense door. Two of the side surfaces are two side surfaces, which contact the inner side surfaces of the flat block structure and the oblique block structure. The fourth side surface is the front surface, which is a wavy structure and is used to abut against the sealing edge provided on the edge of the door leaf of the civil defense door. The sealing edge is squeezed and deformed to achieve airtight contact between the door leaf of the civil defense door and the door frame of the civil defense door.

[0079] It should be noted that: when installing the hinge assembly and the door lock system of the utility model, all rotating parts are scrubbed clean and oiled, and regular maintenance is carried out during the later use; the outer side of the civil air defense door leaf is provided with an artistic coating or artistic marking according to the customer's artistic requirements; after the civil air defense door leaf is assembled and welded, the inner surface of the civil air defense door leaf and the periphery of the door leaf are smoothed, and the flatness is <2.

[0080] Step 3: Install the civil air defense door leaf (install the main door leaf 2).

[0081] Install the door leaf of the civil air defense door to the door frame of the civil air defense door. Specifically, the utility model uses at least two sets of hinge assemblies to install the door leaf of the civil air defense door to the door frame of the civil air defense door. In step three, it also includes the step of making the hinge assembly, vertically fixing two first clips spaced apart on the first substrate to form a door frame hinge part, vertically fixing a second clip on the second substrate to form a door leaf hinge part, fixing the door frame hinge part to the door frame of the civil air defense door with multiple sets of bolts, fixing the door leaf hinge part to the door leaf of the civil air defense door with multiple sets of bolts, clamping the second clip between the two first clips, setting a bearing on the lower side of the second clip and between the second clip and the first clip, and setting an adjustment block on the upper side of the second clip and between the second clip and the first clip. Furthermore, in step three, an adjustment long hole is provided on the first card plate, and the length direction of the adjustment long hole is perpendicular to the first substrate. A mounting circular hole is provided on the second card plate, and bolts for assembling the door frame hinge part and the door leaf hinge part are provided through the first card plate and the second card plate, and the door leaf hinge part can be adjusted in position relative to the door frame hinge part through the adjustment long hole, so as to provide avoidance space for the rotation of the civil defense door leaf when the civil defense door leaf is opened.

[0082] With reference to the above-mentioned installation method of the main door leaf 2, the auxiliary door leaf 4 can be arranged on the main door leaf 2, which will not be described in detail here.

[0083] As can be seen from the above, the utility model provides a method for making an insulated and airtight door, and the method for making an insulated and airtight door includes: step one, making a door leaf of a civil air defense door, filling foam aluminum material between two aluminum alloy sheets or stainless steel sheets to form a door leaf production original plate with a sandwich structure, cutting the door leaf production original plate according to the size and shape of the hole for installing the civil air defense door as required, opening holes on the door leaf production original plate according to the installation requirements of the door lock system of the civil air defense door for installing the door lock system, and then cutting and punching the door leaf production original plate Carry out edging to form the door leaf of the civil air defense door; Step 2, make the door frame of the civil air defense door, use L-shaped steel profiles as the door frame making material, cut the door frame making material according to the size and shape of the opening where the civil air defense door is to be installed, and form a multi-section structure, install each section to the edge of one side of the opening to set the door leaf of the civil air defense door, and fix and install the door frame making material of each section by expansion bolts, and the door frame making materials at the adjacent two ends are offset; Step 3, install the door leaf of the civil air defense door, and use at least two sets of hinge assemblies to install the door leaf of the civil air defense door to the door frame of the civil air defense door. The utility model adopts the above-mentioned method to make a lightweight and high-strength foam aluminum alloy plate civil air defense door. The civil air defense door is made of foam aluminum as the core material, which can give full play to the material properties of foam aluminum, so that the civil air defense door has excellent properties such as light weight and resistance to electromagnetic radiation interference, and at the same time can also ensure that the civil air defense door has reliable structural strength.

[0084] Compared with the prior art, the civil air defense door produced by the utility model has the following technical effects:

[0085] 1. The foam aluminum alloy structure civil air defense door uses a foam aluminum alloy core layer in the middle of the door leaf, which can reach the strength of concrete and steel structure filling, which is beneficial to avoid stress concentration, prolong service life, and has the function of sound absorption and heat insulation;

[0086] 2. Different from the existing honeycomb panels bonded with adhesives, the foam aluminum alloy core panel of the utility model is completely non-combustible, and the layers are composited, and all connections are metallurgical connections. The entire foam aluminum alloy core layered structure is a pure metal structure, which can be welded and processed twice, is light in weight, has high strength, high rigidity, good stability, no pollution, good energy absorption effect, and can be completely recycled;

[0087] 3. The foam aluminum alloy structure civil air defense door of the utility model can achieve different civil air defense levels by changing the size of the foam aluminum alloy core hole inside the door leaf and the thickness of the core plate.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat-insulating sealed door, characterized in that: include: A main door system, the main door system comprising a main door frame for being installed on a building structure and a main door leaf hinged on the main door frame, the main door leaf being airtightly closed on the main door frame, and a main door locking system being arranged in the main door leaf; An insulation chamber is formed in the main door leaf, and an insulation unit is arranged in the insulation chamber. The insulation unit is a strip structure, and the insulation unit is arranged vertically and arranged in sequence along the horizontal direction, or the insulation unit is arranged horizontally and arranged in sequence along the vertical direction.

2. The heat-insulating sealed door according to claim 1, characterized in that: The heat preservation unit abuts against the front inner side surface of the main door leaf and the rear inner side surface of the main door leaf.

3. The heat-insulating sealed door according to claim 1, characterized in that: A partition component is arranged in the heat preservation chamber, and the partition component divides the heat preservation chamber into a plurality of small cavities. Each of the small cavities is provided with a heat preservation unit and is completely filled with the heat preservation unit.

4. The heat-insulating sealed door according to claim 3, characterized in that: The spacing component is a hollow steel pipe, and the spacing component abuts against the front inner side surface of the main door leaf and the rear inner side surface of the main door leaf.

5. The heat-insulating sealed door according to claim 3, characterized in that: Also includes a secondary door system; A secondary door opening is arranged on the main door leaf, a secondary door frame is arranged on the main door leaf and around the secondary door opening, the secondary door system comprises a secondary door leaf, the secondary door leaf is hinged on the main door leaf, the secondary door leaf can be airtightly closed on the main door leaf, and a secondary door locking system is arranged on the secondary door leaf; The heat preservation unit is filled in the auxiliary door leaf.

6. The heat-insulating airtight door according to claim 1, characterized in that: A partition plate is arranged inside the main door leaf, and the partition plate is arranged vertically and divides the internal space of the main door leaf into two independent chambers, one of which is the insulation chamber, and the other is the installation chamber, in which the main door locking system is arranged.

7. The heat-insulating airtight door according to claim 1, characterized in that: The main door leafs include two, and the two main door leafs are of a double-opening structure; A sealing strip is provided on one of the main door leaves, and the door edge of the other main door leaf can be against the sealing strip to achieve an airtight connection between the two main door leaves after they are closed; Along the opening direction of the main door leaf; A mounting member is provided on one of the main door panels provided with the sealing strip, the mounting member is provided on the outer side of the main door panel and close to the rear side of the main door panel, and the sealing strip is fixedly provided on the mounting member; A mating component and a pressing component are provided on the other main door leaf. The mating component is provided on the outer side edge of the main door leaf and close to the rear side surface of the main door leaf. The mating component can be airtightly abutted against the sealing strip. The pressing component is provided on the front side of the mating component to cover the abutting connection between the mating component and the sealing strip.

8. The heat-insulating airtight door according to claim 7, characterized in that: The sealing strip and the matching component are matched with each other in an inclined plane; The press-fit component is a hollow square tube.

9. The heat-insulating airtight door according to claim 5, characterized in that: A main door frame installation groove is arranged on the main door frame, and a main door seal is arranged in the main door frame installation groove, and the main door seal can offset the air tightness of the main door leaf in the closed state; An installation edge is arranged around the outer edge of the auxiliary door leaf, an auxiliary door leaf installation groove is arranged on the installation edge, and an auxiliary door seal is arranged in the auxiliary door leaf installation groove. The auxiliary door seal can be airtightly offset with the auxiliary door frame when the auxiliary door leaf is in a closed state.

10. The heat-insulating airtight door according to any one of claims 1 to 9, characterized in that: The thermal insulation unit is a foam aluminum profile component; The outer contour shape of the heat preservation unit is consistent with the shape of the cavity in which it is located.

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