Damp-proof air-tight door capable of being quickly opened

Abstract

A moisture-proof air-tight door capable of being quickly opened belongs to the related technical field of civil air defense equipment and comprises a door frame, a door cover and a door frame, the large door leaf is hinged to the door frame in an openable and closable mode, the large door leaf and the door frame can form an airtight connection structure in a closed state, and a small channel opening is formed in the large door leaf; the small door leaf is hinged to the large door leaf in an openable and closable mode and can form an airtight connection structure with the small channel opening of the large door leaf in the closed state. The sealing structure is arranged on the large door leaf and used for being in airtight connection with the large door leaf in the closed state of the small door leaf. The barrier-free passage can be realized after the large door leaf is opened, the small door leaf can be quickly opened in emergency after the large door leaf is closed, the opening area of the small door leaf is small, and the small door leaf can be quickly opened and closed, so that the barrier-free passage can be temporarily and quickly opened, and the change degree of humidity on one closed side is reduced.

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 moisture-proof and airtight door that can be opened quickly. Background Art

[0002] A sealed door is a door that can increase airtightness. It is mostly used in the passages from the underground main substation and the main drainage pump room to the bottom of the well. Its function is to prevent sudden intrusion of water. In the prior art, the door leaf of the sealed door is welded by a flat steel plate, a cross-shaped rib plate, and a ring beam, and the door leaf is welded by multiple metal structural parts. Usually, the design size of the sealed door is slightly larger than that of an ordinary residential door. In some special cases, the size of the passage is required to be larger, so the design size of the sealed door will be designed to be larger, or even designed to be a two-leaf structure.

[0003] As can be seen from the above, the sealed door is made of metal materials. If the size is large, its overall mass will increase significantly, making it difficult to open and close, so it is impossible to meet the requirements of temporary opening and quick opening. In addition, sealed doors are mostly used underground. Affected by the use environment and poor ventilation conditions, the humidity inside the passage will become very high, which requires the sealed door to have certain moisture-proof properties to isolate humid airflow. If the sealed door needs to be opened temporarily, a large amount of humid airflow will flow into the sealed side, causing a sudden change in the air parameters on the sealed side (mainly the humidity will increase instantly). Utility Model Content

[0004] 1. Technical issues

[0005] In summary, how to provide a new type of closed door structure that can be opened quickly to achieve temporary and rapid passage of the closed door to reduce the degree of humidity change on the closed side 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 moisture-proof and airtight door that can be opened quickly. In the utility model, the moisture-proof and airtight door that can be opened quickly includes:

[0009] A door frame (1) is used for being fixedly installed at the passage opening;

[0010] A large door leaf (2), the large door leaf being hinged to the door frame in an openable and closable manner and being able to form an airtight connection structure with the door frame in a closed state, and a small passage opening being arranged on the large door leaf;

[0011] A small door leaf (3), the small door leaf being hinged to the large door leaf in an openable and closable manner and being able to form an airtight connection structure with the small passage opening of the large door leaf in a closed state;

[0012] A sealing structure (4) is arranged on the large door leaf and is used for an airtight connection between the small door leaf and the large door leaf when the small door leaf is in a closed state.

[0013] Preferably, in the quickly-openable moisture-proof and airtight door provided by the present invention, the sealing structure is a rubber strip, which is arranged around the small passage opening and can form a compression deformation connection structure with the small door leaf.

[0014] Preferably, in the quickly-openable moisture-proof and sealed door provided by the utility model, one side of the large door leaf is the front side, which is used to hinge the small door leaf and surround the small passage opening, and a U-shaped mounting plane is provided on the front side of the large door leaf, and the sealing structure is fixed on the mounting plane by screws; the rear side of the small door leaf is used to abut against the sealing structure as a U-shaped contact plane, which is used to squeeze the sealing structure in a closed state.

[0015] Preferably, in the quick-opening moisture-proof sealed door provided by the utility model, the sealing structure includes a front protrusion and a rear mounting portion, the front protrusion is arranged on the front side surface of the rear mounting portion, the rear side surface of the rear mounting portion is a plane for counteracting the mounting plane, and the front end of the front protrusion is a protruding smooth spherical structure.

[0016] Preferably, in the quickly-openable moisture-proof and sealed door provided by the utility model, at least two parallel front protrusions are provided on one of the rear mounting parts, the front protrusions are spaced apart, and a mounting hole for bolts to pass through is provided on the rear mounting part between two adjacent front protrusions, and the sealing structure is fixed to the large door leaf by the bolts.

[0017] Preferably, in the quickly-openable moisture-proof and airtight door provided by the present invention, the front protrusion has a cavity structure.

[0018] Preferably, in the quickly-openable moisture-proof sealed door provided by the present invention, the sealing structure is made of rubber material, and the sealing structure is an integrated structure.

[0019] Preferably, in the quickly openable moisture-proof and sealed door provided by the utility model, the large door leaf is hinged to the door frame through a first support arm (5), the first support arm is an L-shaped structure, the first support arm includes a first transverse support arm and a first longitudinal support arm, the first transverse support arm is welded to the front side surface of the large door leaf, one end of the first longitudinal support arm is connected to the first transverse support arm, the other end of the first longitudinal support arm is provided with a hinge seat and is arranged on the door frame through the hinge seat, and the first longitudinal support arm is welded to the side of the large door leaf; the small door leaf is hinged to the large door leaf through a second support arm (6), the second support arm is an L-shaped structure, the second support arm includes a second transverse support arm and a second longitudinal support arm, the second transverse support arm is welded to the front side surface of the small door leaf, one end of the second longitudinal support arm is connected to the second transverse support arm, the other end of the second longitudinal support arm is provided with a hinge seat and is arranged on the large door leaf through the hinge seat, and the second longitudinal support arm is welded to the side of the small door leaf.

[0020] Preferably, in the quickly-openable moisture-proof and sealed door provided by the present invention, the large door leaf includes a first door leaf body, a first door leaf frame is arranged on the outer side of the first door leaf body, the first door leaf frame is a U-shaped structure welded from square steel pipes, and the installation plane is located on the first door leaf frame; the small door leaf includes a second door leaf body, a second door leaf frame is arranged on the outer side of the second door leaf body, the second door leaf frame is a U-shaped structure welded from square steel pipes, and the contact plane is located on the second door leaf frame.

[0021] Preferably, in the quickly-openable moisture-proof sealed door provided by the utility model, a first door lock system (7) of a connecting rod type is arranged in the large door leaf; a second door lock system (8) of a connecting rod type is arranged in the small door leaf, and the second door lock system includes a lock (9) for locking the second door lock system open or closed, and the lock is a mechanical rotary password lock.

[0022] (III) Beneficial effects

[0023] As can be seen from the above, the utility model provides a moisture-proof and airtight door that can be opened quickly. In the utility model, the moisture-proof and airtight door that can be opened quickly includes: a door frame, which is used to be fixedly installed at the passage opening; a large door leaf, which can be hinged on the door frame in an openable and closable manner and can form an airtight connection structure with the door frame in a closed state, and a small passage opening is provided on the large door leaf; a small door leaf, which can be hinged on the large door leaf in an openable and closable manner and can form an airtight connection structure with the small passage opening of the large door leaf in a closed state; a sealing structure, which is provided on the large door leaf and is used for an airtight connection between the small door leaf and the large door leaf in a closed state. Through the above structural design, barrier-free passage can be achieved after the large door leaf is opened, and after the large door leaf is closed, the small door leaf can be quickly opened in an emergency situation. The opening area of ​​the small door leaf is small, and it can be opened and closed quickly to prevent external humid airflow from entering one side of the closed space. The moisture-proof sealed door that can be opened quickly provided by the utility model is a new type of sealed door structure that can be opened quickly. After the utility model is put into practical application, it can be temporarily opened quickly to reduce the degree of change of humidity on the sealed side. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the structure of a moisture-proof and airtight door that can be opened quickly in an embodiment of the utility model;

[0026] Figure 2 This is a side view structural diagram of a moisture-proof and airtight door that can be opened quickly in an embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the top view of the structure of the moisture-proof and airtight door that can be opened quickly in the embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the door frame in the embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the side structure of the door frame in the embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the top view of the door frame in the embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the door leaf in the embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the side structure of the door leaf in the embodiment of the utility model;

[0033] Fig. 9 This is a schematic diagram of the top view of the door leaf in the embodiment of the utility model;

[0034] Fig.10 It is a schematic diagram of the structure of the first door lock system in an embodiment of the utility model.

[0035] exist Figures 1 to 10 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0036] Door frame 1, large door leaf 2, small door leaf 3, sealing structure 4, first support arm 5, second support arm hinge 6, first door locking system 7, second door locking system 8, lock 9. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] Please refer to Figures 1 to 10 ,in, Figure 1 This is a schematic diagram of the structure of a moisture-proof and airtight door that can be opened quickly in an embodiment of the utility model; Figure 2 This is a side view structural diagram of a moisture-proof and airtight door that can be opened quickly in an embodiment of the utility model; Figure 3 This is a schematic diagram of the top view of the structure of the moisture-proof and airtight door that can be opened quickly in the embodiment of the utility model; Figure 4 This is a schematic diagram of the structure of the door frame in the embodiment of the utility model; Figure 5 This is a schematic diagram of the side structure of the door frame in the embodiment of the utility model; Figure 6 This is a schematic diagram of the top view of the door frame in the embodiment of the utility model; Figure 7 This is a schematic diagram of the structure of the door leaf in the embodiment of the utility model; Figure 8 This is a schematic diagram of the side structure of the door leaf in the embodiment of the utility model; Fig. 9 This is a schematic diagram of the top view of the door leaf in the embodiment of the utility model; Fig.10 It is a schematic diagram of the structure of the first door lock system in an embodiment of the utility model.

[0040] The utility model provides a moisture-proof and airtight door that can be opened quickly. In the utility model, the moisture-proof and airtight door that can be opened quickly comprises the following component structure.

[0041] Part 1: Door frame1.

[0042] The door frame 1 is used for fixed installation at the passageway. The door frame 1 is set according to the opening size of the installation position. The door frame 1 is an overall "mouth"-shaped structure. The door frame 1 includes a square frame formed by butting (welding) square steel pipes, and a steel plate is arranged on the outer side of the square frame (fixed to the building by expansion bolts), and a flat steel is arranged on the front side or rear side of the square frame to increase the overall structural strength of the door frame 1. Furthermore, the utility model can also wrap a layer of flat steel on the outer side of the square frame as a whole, while improving the structural strength of the door frame 1, it can also improve the moisture-proof and corrosion-resistant performance of the door frame 1. Further, the utility model can also spray anti-corrosion paint on the outer side of the door frame 1. The steel plate arranged on the outer side of the square frame of the utility model can be a whole structure (that is, a whole steel plate is arranged on each outer side of the square frame), or it can be a single-piece structure (that is, a plurality of steel plates are arranged on each outer side of the square frame, and each steel plate corresponds to an expansion bolt arrangement). The door frame 1 is made of steel material (square steel pipe, steel plate, steel sheet, flat steel) as a whole, and the components can be fixedly connected by welding.

[0043] Part 2: Large door leaf 2.

[0044] The large door leaf 2 is the first door leaf arranged on the door frame 1, and is used to be opened when the traffic volume is large to realize barrier-free passage of people and vehicles. The large door leaf 2 can be hinged on the door frame 1 and can form an airtight connection structure with the door frame 1 in a closed state. A small passage opening is arranged on the large door leaf 2. The large door leaf 2 adopts a steel frame plus steel plate veneer structure, with square steel pipes as the internal skeleton of the large door leaf 2, and a layer of steel skin is arranged on the outside of the internal skeleton (the steel skin can be welded to the internal skeleton, or fixed to the internal skeleton by rivets or bolts). The interior of the large door leaf 2 is hollow, and is used to install the first door lock system 7. In the utility model, the first door lock system 7 is a linkage type (the first door lock system 7 is provided with a plurality of door bolts, and the plurality of door bolts are linked by a linkage) door lock system. The first door lock system 7 includes a plurality of door bolts, and a door bolt socket structure is provided on the door frame 1 corresponding to each door bolt. The door bolts are linked by a linkage, a steering component, etc. A hand wheel is provided on the large door leaf 2, and all the door bolts are driven to operate synchronously (inserted into the door bolt socket structure or retracted from the door bolt socket structure) by rotating the hand wheel.

[0045] Specifically, the large door leaf 2 includes a first door leaf body (a part of the internal frame, which can be understood as the structural reinforcement part inside the internal frame, such as the longitudinal and transverse beams of the internal frame, etc.), and a first door leaf frame is arranged on the outer side of the first door leaf body (another part of the internal frame, which can be understood as the outermost structure of the internal frame, and the main structure of the internal frame, and the overall shape is a "mouth"). The first door leaf frame is a mouth-shaped structure welded from square steel pipes, and the installation plane is located on the first door leaf frame. In the utility model, the large door leaf 2 is made of steel material as a whole, for example, the internal frame is made of square steel pipe welders, and the outer skin is steel skin, etc.

[0046] The large door leaf 2 is hingedly arranged on the door frame 1. Specifically, the large door leaf 2 is hingedly connected to the door frame 1 through a first support arm 5. The first support arm 5 is an L-shaped structure. The first support arm 5 includes a first transverse support arm and a first longitudinal support arm. The first transverse support arm is welded to the front side surface of the large door leaf 2. One end of the first longitudinal support arm is connected to the first transverse support arm. The other end of the first longitudinal support arm is provided with a hinge seat and is arranged on the door frame 1 through the hinge seat. The first longitudinal support arm is welded to the side of the large door leaf 2. The first arm 5 is a steel one-piece structure, and the first arm 5 is installed on the door frame 1 through a hinge seat. Specifically, the hinge seat includes an upper limit plate and a lower limit plate, and a fixed block and a bearing are arranged between the upper limit plate and the lower limit plate. The end of the first arm 5 (the end of the first longitudinal arm) is assembled between the fixed block and the bearing (the bearing is located on the lower side, and the fixed block is on the upper side). The bearing is used to support the first arm 5, and the fixed block is used to adjust the movable gap of the first arm 5 (in the present utility model, the up and down movable amount of the first arm 5 is small to ensure that the large door leaf 2 is stably and accurately closed to the door frame 1). In the present utility model, a plurality of first arms 5 are provided (two first arms 5 are provided when the overall mass of the large door leaf 2 is small, and three or four first arms 5 are provided when the overall mass of the large door leaf 2 is large).

[0047] The utility model provides a small passage opening on the large door leaf 2, and a square steel pipe is provided on the small passage opening. Furthermore, a flat steel is provided on the square steel pipe at the small passage opening to improve the structural strength of the square steel pipe.

[0048] Part three: small door leaf 3.

[0049] The small door leaf 3 is an openable small door structure arranged on the large door leaf 2, and is used to achieve rapid passage of a single person.

[0050] In the utility model, the small door leaf 3 is hinged to the large door leaf 2 in an openable and closable manner and can form an airtight connection structure with the small passage opening of the large door leaf 2 in a closed state.

[0051] The structure of the small door leaf 3 is similar to that of the large door leaf 2 as a whole.

[0052] The small door leaf 3 can be hinged on the large door leaf 2 in an openable and closable manner and can form an airtight connection structure with the large door leaf 2 in a closed state. Specifically, the small door leaf 3 adopts a steel frame plus steel plate veneer structure, with a square steel pipe as the internal skeleton of the small door leaf 3, and a layer of steel skin is arranged on the outside of the internal skeleton (the steel skin can be welded to the internal skeleton, or fixed to the internal skeleton by rivets or bolts), and the small door leaf 3 is hollow inside for installing the second door lock system 8. In the utility model, the second door lock system 8 is a connecting rod type (the second door lock system 8 is provided with a plurality of bolts, and the plurality of bolts are linked by connecting rods) door lock system, and the second door lock system 8 includes a plurality of bolts, and a bolt plug hole structure is arranged on the large door leaf 2 corresponding to each bolt, and the bolts are linked by connecting rods, steering components, etc., and a hand wheel is arranged on the small door leaf 3, and all the bolts are driven to operate synchronously (inserted into the bolt plug hole structure or withdrawn from the bolt plug hole structure) by rotating the hand wheel.

[0053] The small door leaf 3 is hingedly arranged on the large door leaf 2. Specifically, the small door leaf 3 is hingedly connected to the large door leaf 2 through a second arm 6. The second arm is an L-shaped structure. The second arm includes a second transverse arm and a second longitudinal arm. The second transverse arm is welded to the front side of the small door leaf 3. One end of the second longitudinal arm is connected to the second transverse arm. The other end of the second longitudinal arm is provided with a hinge seat and is arranged on the large door leaf 2 through the hinge seat. The second longitudinal arm is welded to the side of the small door leaf 3. The second arm is a steel integrated structure. The second arm is installed on the large door leaf 2 through a hinge seat.

[0054] Specifically, the hinge seat includes an upper limit plate and a lower limit plate, a fixed block and a bearing are arranged between the upper limit plate and the lower limit plate, and the end of the second arm (the end of the second longitudinal arm) is assembled between the fixed block and the bearing (the bearing is located at the lower side, and the fixed block is at the upper side). The bearing is used to support the second arm, and the fixed block is used to adjust the movable gap of the second arm. In the utility model, the up and down movable amount of the second arm is small to ensure that the small door leaf 3 is stably and accurately closed to the large door leaf 2, and the second arm is provided with multiple, and the optimal structural design is to have two second arms.

[0055] The utility model sets a connecting rod type second door lock system 8 (the second door lock system 8 is as described above) in the small door leaf 3. Specifically, the second door lock system 8 includes a lock 9, which is used to lock the second door lock system 8 to open or close. The lock 9 is a mechanical rotary password lock, and its structure is similar to the password lock structure used in the safe in the prior art. By rotating the external rotary knob, the second door lock system 8 can be unlocked when the password is correct, and then the second door lock system 8 can be manually started to open the small door leaf 3. Of course, this structure can also be applied to the large door leaf 2.

[0056] Part 4: Sealing structure4.

[0057] The sealing structure 4 is a structure of the utility model that ensures the sealed connection between the small door leaf 3 and the large door leaf 2. Specifically, the sealing structure 4 is arranged on the large door leaf 2, and is used for the airtight connection between the small door leaf 3 and the large door leaf 2 when the small door leaf 3 is in the closed state. The small passage opening arranged on the large door leaf 2 of the utility model is a rectangular opening structure, and the centroid of the small passage opening is arranged concentrically with the centroid of the large door leaf 2, that is, the small passage opening is arranged in the middle position of the large door leaf 2. It is defined here that: one side of the large door leaf 2 is the front side surface, which is used to hinge the small door leaf 3, surround the small passage opening, and a mouth-shaped mounting plane is arranged on the front side surface of the large door leaf 2, and the sealing structure 4 is fixedly arranged on the mounting plane by screws; the rear side surface of the small door leaf 3 is used to abut against the sealing structure 4. The part is a mouth-shaped contact plane, which is used to squeeze the sealing structure 4 in the closed state. In order to facilitate the fixed arrangement of the sealing structure 4 on the large door leaf 2, the utility model designs the position where the large door leaf 2 needs to be provided with the sealing structure 4 as a plane structure, and the above-mentioned mounting plane, and a screw hole is punched on the mounting plane, and the sealing structure 4 is fixed to the large door leaf 2 by screws.

[0058] Specifically, the sealing structure 4 is a rubber strip, which is arranged around the small passage opening and can form a compression deformation connection structure with the small door leaf 3. Furthermore, the sealing structure 4 includes a front protruding portion and a rear mounting portion, the front protruding portion is arranged on the front side surface of the rear mounting portion, the rear side surface of the rear mounting portion is a plane used to abut against the mounting plane, and the front end of the front protruding portion is a protruding smooth spherical structure. The rear mounting portion is a rubber flat plate structure, and its rear side surface is a plane, which is tightly abutted against the mounting plane of the large door leaf 2. In order to improve the connection strength and sealing between the sealing structure 4 and the large door leaf 2, the utility model can optimize the structure of the rear mounting portion, and specifically can adopt a non-uniform shape, such as a wave-shaped, stepped or multi-triangular edge (similar to a washboard structure) structure, and correspondingly, a structure adapted to the rear mounting portion is also adopted on the large door leaf 2. The front protrusion is used to abut against the rear side of the small door leaf 3. The front end of the front protrusion is a protruding smooth spherical structure. The contact plane abuts against the front protrusion, and pressure can be applied to the front protrusion to deform it, thereby improving the sealing. Furthermore, a smooth spherical groove can be provided on the contact plane. After the small door leaf 3 is closed, the front protrusion can be inserted into the spherical groove of the contact plane (it should be noted that the depth of the spherical groove provided on the contact plane is smaller than the height of the front protrusion. In this way, after the small door leaf 3 is closed, even if the front protrusion is inserted into the spherical groove, it will be deformed by a certain pressure).

[0059] Furthermore, at least two parallel front protrusions are provided on a rear mounting portion, the front protrusions are spaced apart from each other, and mounting holes for bolts to pass through are provided on the rear mounting portion between two adjacent front protrusions, and the sealing structure 4 is fixed to the door leaf 2 by bolts.

[0060] In one embodiment of the utility model, the front protrusion is a solid structure. In another embodiment of the utility model, the front protrusion has a cavity structure, and the deformation of the front protrusion can be increased by providing the cavity structure, thereby achieving the purpose of improving the sealing of the connection between the large door leaf 2 and the small door leaf 3.

[0061] Specifically, the sealing structure 4 is made of rubber material, and the sealing structure 4 is an integrated structure.

[0062] As can be seen from the above, the utility model provides a moisture-proof and airtight door that can be opened quickly. In the utility model, the moisture-proof and airtight door that can be opened quickly includes: a door frame 1, which is used to be fixedly installed at the passage opening; a large door leaf 2, which can be hinged on the door frame 1 in an openable and closable manner and can form an airtight connection structure with the door frame 1 in a closed state, and a small passage opening is provided on the large door leaf 2; a small door leaf 3, which can be hinged on the large door leaf 2 in an openable and closable manner and can form an airtight connection structure with the small passage opening of the large door leaf 2 in a closed state; a sealing structure 4, which is provided on the large door leaf 2 and is used for an airtight connection between the large door leaf 2 and the small door leaf 3 in a closed state. Through the above structural design, after the large door leaf 2 is opened, barrier-free travel through the passage can be achieved, and after the large door leaf 2 is closed, the small door leaf 3 can be quickly opened in an emergency situation, and the opening area of ​​the small door leaf 3 is small, and it can be opened and closed quickly to prevent external humid airflow from entering one side of the closed space. The moisture-proof sealed door that can be opened quickly provided by the utility model is a new type of sealed door structure that can be opened quickly. After the utility model is put into practical application, it can be temporarily opened quickly to reduce the degree of change of humidity on the sealed side.

[0063] 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 moisture-proof and airtight door that can be opened quickly, characterized in that: include: A door frame (1) is used for being fixedly installed at the passage opening; A large door leaf (2), the large door leaf being hinged to the door frame in an openable and closable manner and being able to form an airtight connection structure with the door frame in a closed state, and a small passage opening being arranged on the large door leaf; A small door leaf (3), the small door leaf being hinged to the large door leaf in an openable and closable manner and being able to form an airtight connection structure with the small passage opening of the large door leaf in a closed state; A sealing structure (4) is arranged on the large door leaf and is used for an airtight connection between the small door leaf and the large door leaf when the small door leaf is in a closed state.

2. The moisture-proof and airtight door that can be opened quickly according to claim 1 is characterized in that: The sealing structure is a rubber strip, which is arranged around the small passage opening and can form a compression deformation connection structure with the small door leaf.

3. The moisture-proof and airtight door that can be opened quickly according to claim 2 is characterized in that: One side of the large door leaf is the front side, which is used to hinge the small door leaf and surround the small passage opening. A U-shaped mounting plane is provided on the front side of the large door leaf, and the sealing structure is fixed on the mounting plane by screws. The portion of the rear side surface of the small door leaf that abuts against the sealing structure is a square-shaped contact plane, which is used to squeeze the sealing structure in a closed state.

4. The moisture-proof and airtight door that can be opened quickly according to claim 3 is characterized in that: The sealing structure includes a front protrusion and a rear mounting portion, wherein the front protrusion is arranged on the front side of the rear mounting portion, the rear side of the rear mounting portion is a plane for abutting against the mounting plane, and the front end of the front protrusion is a protruding smooth spherical structure.

5. The moisture-proof and airtight door that can be opened quickly according to claim 4 is characterized in that: At least two parallel front protrusions are arranged on one of the rear mounting parts. The front protrusions are arranged at intervals. A mounting hole for bolts to pass through is arranged on the rear mounting part between two adjacent front protrusions, and the sealing structure is fixed to the door leaf by the bolts.

6. The moisture-proof and airtight door that can be opened quickly according to claim 5 is characterized in that: The front protrusion has a cavity structure.

7. The moisture-proof and airtight door that can be opened quickly according to claim 6 is characterized in that: The sealing structure is made of rubber material and is an integrated structure.

8. The moisture-proof and airtight door that can be opened quickly according to claim 3 is characterized in that: The large door leaf is hinged to the door frame via a first support arm (5), the first support arm is an L-shaped structure, the first support arm comprises a first transverse support arm and a first longitudinal support arm, the first transverse support arm is welded to the front side of the large door leaf, one end of the first longitudinal support arm is connected to the first transverse support arm, the other end of the first longitudinal support arm is provided with a hinge seat and is arranged on the door frame via the hinge seat, and the first longitudinal support arm is welded to the side of the large door leaf; The small door leaf is hinged to the large door leaf through a second support arm (6), the second support arm is an L-shaped structure, the second support arm includes a second transverse support arm and a second longitudinal support arm, the second transverse support arm is welded to the front side of the small door leaf, one end of the second longitudinal support arm is connected to the second transverse support arm, the other end of the second longitudinal support arm is provided with a hinge seat and is arranged on the large door leaf through the hinge seat, and the second longitudinal support arm is welded to the side of the small door leaf.

9. The moisture-proof and airtight door that can be opened quickly according to claim 8, characterized in that: The large door leaf comprises a first door leaf body, a first door leaf frame is arranged on the outer side of the first door leaf body, the first door leaf frame is a square-shaped structure welded from square steel pipes, and the installation plane is located on the first door leaf frame; The small door leaf includes a second door leaf body, and a second door leaf frame is arranged on the outer side of the second door leaf body. The second door leaf frame is a U-shaped structure welded from square steel pipes, and the contact plane is located on the second door leaf frame.

10. The moisture-proof and airtight door that can be opened quickly according to any one of claims 1 to 9, characterized in that: A first door lock system (7) of connecting rod type is arranged in the door leaf; A second door lock system (8) of connecting rod type is arranged in the small door leaf, and the second door lock system comprises a lock (9) for locking the second door lock system open or closed, and the lock is a mechanical rotary password lock.

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