Thresholdless waterproof access door

Abstract

A kind of no threshold waterproof airtight door belongs to the related technical field of civil air defense equipment, including door frame and door leaf, door leaf is hinged to door frame and can be watertight contact with the two sides and top edge of door frame in closed state, door lock system is arranged on door leaf, for locking door leaf on door frame;Ground sealing assembly is also provided on the door leaf and linked with the door lock system, ground sealing assembly includes ground sealing beam hinged to door leaf and can be turned up and down relative to door leaf, sealing rubber strip that can be deformed under pressure is arranged on the bottom surface of ground sealing beam, ground sealing beam can be sealed contact with door leaf and ground simultaneously.Locking mechanism is linked with ground sealing beam, realize the quick opening and closing of door, and realize very low leakage in a long time.The present application has no protruding threshold on the ground, whether in peacetime or wartime, facilitate mass personnel passage, adopt new ground sealing mechanism to seal the ground, without live threshold or lifting door leaf.

Description

Technical Field

[0001] This invention relates to the technical field of civil defense equipment, and more specifically, to a threshold-free waterproof and airtight door. Background Technology

[0002] Waterproof doors are devices installed to prevent the inundation of underground facilities during severe weather conditions, such as concentrated rainfall causing river flooding or flooding. For example, waterproof doors are installed at the external entrances of buildings like subways, and at the entrances of underground parking lots in public places and infrastructure at risk of flooding. Specifically, they can be passageways, ventilation openings, and entrances and exits of new buildings at ground level and above ground.

[0003] Therefore, waterproof doors prepared to prevent the flooding of underground facilities must not only have excellent water tightness to prevent the spread of disasters, but also be able to be opened and closed stably in emergency situations.

[0004] Currently, in existing technologies, the waterproofing function of a waterproof door is achieved through direct contact between the door leaf and the door frame after it is closed. Since both the door leaf and frame are mostly made of metal sheets, the smoothness of their surfaces makes it difficult to achieve a complete seal upon contact. Furthermore, for waterproof doors without thresholds, ensuring water tightness between the door leaf and the ground is even more challenging. Therefore, the water tightness of traditional waterproof doors needs improvement. Summary of the Invention

[0005] (a) Technical issues In conclusion, how to structurally improve traditional waterproof doors to enhance their watertightness while maintaining stable opening and closing performance has become a pressing issue for those skilled in the art.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a thresholdless waterproof and airtight door. In the present invention, the thresholdless waterproof and airtight door includes a door frame and a door leaf. The door leaf is hinged to the door frame and can make watertight contact with the two sides and the top edge of the door frame in the closed state. A door lock system is provided on the door leaf for locking the door leaf to the door frame. The door leaf is also provided with a ground sealing assembly that is linked to the door lock system. The ground sealing assembly includes a ground sealing beam that is hinged to the door leaf and can be rotated up and down relative to the door leaf. A sealing strip that can be deformed under pressure is provided on the bottom surface of the ground sealing beam. The ground sealing beam can achieve a sealed contact with both the door leaf and the ground at the same time.

[0007] Preferably, in the thresholdless waterproof airtight door provided by the present invention, a door leaf sealing contact plate is provided at the bottom of the door leaf and on the side where the ground sealing beam is provided on the door. A sealing beam contact plate is provided on the ground sealing beam, which can be rotated with the ground sealing beam and can make sealing contact with the door leaf sealing contact plate. The sealing connection between the door leaf and the ground sealing beam is achieved through the cooperation between the door leaf sealing contact plate and the sealing beam contact plate.

[0008] Preferably, in the thresholdless waterproof airtight door provided by the present invention, a sealing adhesive layer is provided on the side of the door leaf sealing contact plate that abuts against the sealing beam contact plate.

[0009] Preferably, in the thresholdless waterproof and airtight door provided by the present invention, the ground sealing assembly includes a transmission group; the transmission group includes a lateral moving link that is linked with the door lock system and can perform lateral reciprocating motion, a push-pull link for transmitting push and pull force, a transmission component disposed between the lateral moving link and the push-pull link for transmitting power, and a limiting plate for flipping and limiting the ground sealing beam. The limiting plate is provided with an arc-shaped sliding groove, and a sliding block is slidably engaged with the arc-shaped sliding groove. The sliding block is fixedly disposed relative to the ground sealing beam. The push-pull link is connected to the ground sealing beam through a universal joint, and the transmission component is hinged to the lateral moving link and the push-pull link.

[0010] Preferably, in the thresholdless waterproof airtight door provided by the present invention, the limiting plates are arranged in pairs, with the two limiting plates in the same group arranged parallel and spaced apart, and a sliding plate is provided between the two limiting plates in the same group. The sliding plate is fixedly arranged with the ground sealing beam, and the sliding block is fixedly arranged on the sliding plate.

[0011] Preferably, in the thresholdless waterproof and airtight door provided by the present invention, the transmission component includes a first fork arm and a second fork arm, the first fork arm and the second fork arm are connected by a bushing, the bushing is disposed on the door leaf, the first fork arm is hinged to the lateral linkage, and the second fork arm is hinged to the push-pull linkage.

[0012] Preferably, in the thresholdless waterproof airtight door provided by the present invention, a limiting device is provided on the door leaf relative to the end of the lateral linkage for limiting the lateral movement of the lateral linkage.

[0013] Preferably, in the thresholdless waterproof and airtight door provided by the present invention, multiple sets of limiting plates are provided, and all the limiting plates are equally spaced; the lateral linkage, the push-pull linkage, and the transmission component constitute a linkage unit, and multiple sets of linkage units are provided and spaced apart.

[0014] Preferably, in the thresholdless waterproof airtight door provided by the present invention, the universal joint includes a universal joint connecting seat, the universal joint connecting seat is a U-shaped frame structure, a connecting ball is provided in the universal joint connecting seat, the bottom end of the push-pull connecting rod is provided with a push-pull connecting rod connecting hole that slides with the connecting ball, and the universal joint connecting seat is fixedly connected to the ground sealing beam.

[0015] Preferably, in the thresholdless waterproof and airtight door provided by the present invention, a trapezoidal groove is provided on the bottom surface of the ground sealing beam, the cross-section of the sealing strip is a trapezoidal section, and the sealing strip is detachably disposed in the trapezoidal groove.

[0016] (III) Beneficial Effects As described above, this invention provides a thresholdless waterproof and airtight door. In this invention, the thresholdless waterproof and airtight door includes a door frame and a door leaf. The door leaf is hinged to the door frame and can make watertight contact with the two sides and top edge of the door frame in the closed state. A door lock system is provided on the door leaf for locking the door leaf to the door frame. A ground sealing assembly linked to the door lock system is also provided on the door leaf. The ground sealing assembly includes a ground sealing beam hinged to the door leaf and capable of rotating up and down relative to the door leaf. A pressure-deformable sealing strip is provided on the bottom surface of the ground sealing beam. The ground sealing beam can simultaneously achieve a sealed contact with both the door leaf and the ground. Through the above structural design, when the ground sealing beam is fully engaged with the ground, the door mechanically compresses the bottom sealing strip. After operating the fast-opening and closing locking mechanism, the locking mechanism and the ground sealing beam are linked, enabling the door to open and close quickly and achieving extremely low leakage over a relatively long period. Compared with traditional closed doors, the threshold-free waterproof and airtight door provided by this invention has at least the following advantages: 1. There is no threshold protruding from the ground, whether in peacetime or wartime, facilitating the passage of large numbers of people; 2. A brand-new ground sealing mechanism seals the ground, eliminating the need for a movable threshold or a lifting door leaf, allowing for quick conversion between peacetime and wartime functions; 3. The ground sealing mechanism is simple in design and easy to operate; a simple lever operation can achieve complex ground sealing functions. It also has a self-locking function, ensuring that the ground sealing beam is in the open or closed position without any opening or closing force, preventing it from falling or lifting on its own. Its opening and closing are reliable and stable, and it has excellent watertightness. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1 This is a schematic diagram of the structure of the thresholdless waterproof and airtight door in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the thresholdless waterproof and airtight door inner door lock system in an embodiment of the present invention; Figure 3 This is a partial structural diagram of the thresholdless waterproof airtight door located at its top in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the bottom ground sealing assembly of the thresholdless waterproof airtight door in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the thresholdless waterproof airtight door located near the hinge seat on one side in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of a thresholdless waterproof airtight door located on its other side away from the hinge seat in one embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of a thresholdless waterproof airtight door located on its other side away from the hinge seat in another embodiment of the present invention.

[0018] in, Figure 6 and Figure 7 Different door frame structures were selected.

[0019] exist Figures 1 to 7 In the diagram, the correspondence between component names and reference numerals is as follows: 1. Door frame; 2. Door leaf; 3. Ground sealing beam; 4. Sealing strip; 5. Door leaf sealing contact plate. 6. Sealing beam contact plate; 7. Sealing adhesive layer; 8. Lateral linkage; 9. Push-pull linkage; 10. Transmission component. Limiting plate 11, sliding block 12, limiting device 13, door lock 14, hinge seat 15, hinge arm 16. 17. Handwheel; 18. Large gear; 19. Door bolt; 20. Transition plate; 21. Door leaf sealing strip. Door frame protrusion 22. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0021] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] Please refer to Figures 1 to 7 ,in, Figure 1 This is a schematic diagram of the structure of the thresholdless waterproof and airtight door in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the thresholdless waterproof and airtight door inner door lock system in an embodiment of the present invention; Figure 3 This is a partial structural diagram of the thresholdless waterproof airtight door located at its top in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the bottom ground sealing assembly of the thresholdless waterproof airtight door in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the thresholdless waterproof airtight door located near the hinge seat on one side in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of a thresholdless waterproof airtight door located on its other side away from the hinge seat in one embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of a thresholdless waterproof airtight door located on its other side away from the hinge seat in another embodiment of the present invention.

[0023] The present invention provides a thresholdless waterproof and airtight door, including a door frame 1 and a door leaf 2. The door leaf 2 is hinged to the door frame 1 and can close with the two sides and the top edge of the door frame 1 to form a watertight contact. A door lock system is provided on the door leaf 2 for locking the door leaf 2 to the door frame 1.

[0024] In this invention, door leaf 2 is a rectangular door leaf. For ease of structural description, the orientation descriptions used in this application are all based on the door leaf 2 in its usage state. Door frame 1 is an inverted U-shaped structure, including side door frames on both sides and a top door frame (without a threshold). The side door frames and the top door frame are installed to the doorway or passage of the building by expansion bolts. A door lock 14 (a metal base structure used to lock the door bolt 19 onto the door frame 1 after it extends; the invention may also provide a transition piece 20 on the door lock 14, which has a slight arc shape to allow the door bolt 19 to slide smoothly onto the door lock 14) is also provided on the side door frames. A hinge seat 15 is also provided on the side door frames, and a hinge arm 16 (the hinge arm 16 is made of metal profile steel to ensure that the hinge arm 16 has high strength) is provided through the hinge seat 15. The hinge arm 16 is fixedly installed on the door leaf 2, thereby realizing the hinge between the door leaf 2 and the door frame 1. A locking mechanism is installed on the door leaf 2 (it can be installed inside the door leaf 2 or on one side of the door leaf 2, i.e., the front or rear side; the optimal structural design is to install the locking mechanism inside the door leaf 2). The specific structure of the locking mechanism is as follows: a handwheel 17 is rotatably installed on the door leaf 2, which can rotate left and right. A small gear is installed on the shaft of the handwheel 17, which can rotate synchronously with the handwheel 17. A large gear 18 is rotatably installed inside the door leaf 2, meshing with the small gear (the small gear drives the large gear 18 to rotate, which can achieve deceleration and increase torque output). The large gear 18 can be a complete gear structure or a partial structure of a complete gear (at least including half of a complete gear part). A gear connecting rod is hinged to the large gear 18, and a first actuator is hinged to the end of the gear connecting rod. The actuator assembly includes a first linkage component that can move up and down in a straight line (the first linkage component is provided with a vertically arranged limiting structure, and limiting wheels are provided on both sides of the limiting structure, so as to ensure that the first linkage component can only move in a straight line in the height direction). The first linkage component is hinged to the end of the gear connecting rod, and the first linkage component can be driven to move up and down by rotating the handwheel 17. A lock hole is provided near the bottom edge of the door leaf 2, and a door bolt 19 is provided in the lock hole. A linkage link is provided between the door bolt 19 and the first linkage component. The linkage links are hinged to the door bolt 19 and the first linkage component. The up and down movement of the first linkage component can drive the door bolt 19 to extend or retract in the lock hole. Referring to the structure of the first actuator assembly, the present invention also designs a second actuator assembly, a third actuator assembly, and a fourth actuator assembly, which are respectively provided for the side door frame and the top door frame. The first actuator assembly, the second actuator assembly, the third actuator assembly, and the fourth actuator assembly are linked sequentially through a linkage assembly (in the prior art, any structure that can realize the change of force transmission direction can be used as a linkage assembly in the present invention, so as to realize the conversion of force in the horizontal and vertical directions).

[0025] To achieve a watertight connection between the door leaf 2 and the door frame 1, the present invention provides a door frame 1 protrusion on both the side door frame and the top door frame. A door frame 1 strip protrudes forward (or backward) on the front (or rear) side of the door frame 1 protrusion. An extension extends parallel to the side of the door frame 1 on one side of the door corresponding to the door frame 1 strip. A groove structure is provided on the extension, and a sealing strip is provided on the groove structure. After the door leaf 2 is closed, the door frame 1 strip can press down on the sealing strip, thereby achieving a watertight contact between the door frame 1 and the door leaf 2. The door lock 14, which is provided on the door frame 1, is located on the other side of the protrusion of the door frame 1 (that is, the door frame 1 and the door lock 14 are respectively located on the front and rear sides of the protrusion of the door frame 1). The present invention provides a metal spring piece, namely a transition piece 20, on the door lock 14 located on the path of the bolt 19. This can reduce the contact wear between the bolt 19 and the door lock 14, and also apply a spring force to the bolt 19, thereby increasing the stability of the door leaf 2 relative to the door frame 1 after it is locked (preventing the door leaf 2 from shaking).

[0026] In the above structural design, the present invention achieves a watertight connection between the door leaf 2 and the door frame 1 at the left, right, and top positions. Since it is impossible to install a threshold protruding from the ground, the present invention cannot use the above structure to achieve a seal at the bottom of the door leaf 2, which is why the sealing performance of the door leaf 2 in the prior art needs improvement. To solve this problem, the present invention proposes the following structural design: a ground sealing component linked to the door lock system is provided on the door leaf 2 (the linkage between the ground sealing component and the door lock system is achieved through a linkage group). The ground sealing component includes a ground sealing beam 3 hinged to the door leaf 2 and capable of rotating up and down relative to the door leaf 2 (the ground sealing beam 3 is located in front of or behind the door leaf 2, and is positioned near the bottom edge of the door leaf 2). A pressure-deformable sealing strip 4 is provided on the bottom surface of the ground sealing beam 3, allowing the ground sealing beam 3 to simultaneously achieve a sealed contact with both the door leaf 2 and the ground.

[0027] This invention features a ground sealing beam 3, which can be flipped to press onto the ground, thus achieving a watertight contact between the ground sealing beam 3 and the ground. After flipping, the ground sealing beam 3 also needs to achieve a watertight contact with the door leaf 2 to completely seal the bottom of the door leaf 2. Specifically, this invention provides a door leaf sealing contact plate 5 at the bottom of the door leaf 2, on the side where the ground sealing beam 3 is located. The door leaf sealing contact plate 5 is made of metal sheet, which ensures that the door leaf sealing contact plate 5 has high structural strength and a certain degree of elasticity. When the door leaf sealing contact plate 5 contacts the ground sealing beam 3, the slight deformation of the door leaf sealing contact plate 5 increases the tightness of the contact between them. A sealing beam contact plate 6 is provided on the ground sealing beam 3, which can flip with the ground sealing beam 3 and can make sealing contact with the door leaf sealing contact plate 5 (the function of the sealing beam contact plate 6 is the same as that of the door leaf sealing contact plate 5). The sealing connection between the door leaf 2 and the ground sealing beam 3 is achieved through the cooperation of the door leaf sealing contact plate 5 and the sealing beam contact plate 6. Furthermore, a sealing layer 7 (made of weather-resistant rubber, with both sides of the sealing layer 7 being flat, is provided on the side of the door leaf sealing contact plate 5 that abuts against the sealing beam contact plate 6, and the sealing layer 7 is fixedly installed on the sealing beam contact plate 6 or the door leaf sealing contact plate 5).

[0028] The ground sealing beam 3 is a movable component of the ground sealing assembly in this invention. It is linked with the door lock system. For driving the ground sealing beam 3, this invention provides a transmission group. Specifically, the transmission group includes a lateral moving link 8 that is linked with the door lock system and can perform lateral reciprocating motion; a push-pull link 9 for transmitting push-pull force (the push-pull link 9 is vertically arranged and is an adjustable-length rod that can convert the lateral movement of the lateral moving link 8 into its own vertical movement); and a transmission component 10 disposed between the lateral moving link 8 and the push-pull link 9 for transmitting power (the transmission component 10 is used to realize the linkage between the ground sealing beam 3 and the door lock system, and to...). The structure transmits force, and a limiting plate 11 is used to flip and limit the ground sealing beam 3. The limiting plate 11 is provided with an arc-shaped sliding groove, and a sliding block 12 is slidably engaged with the arc-shaped sliding groove. The sliding block 12 is fixedly set relative to the ground sealing beam 3. The push-pull connecting rod 9 is connected to the ground sealing beam 3 through a universal joint. The transmission component 10 is hinged to the lateral connecting rod 8 and the push-pull connecting rod 9. Furthermore, the limiting plates 11 are arranged in groups of two. The two limiting plates 11 in the same group are arranged parallel and spaced apart. A sliding plate is provided between the two limiting plates 11 in the same group. The sliding plate is fixedly set to the ground sealing beam 3, and the sliding block 12 is fixedly set on the sliding plate. Furthermore, the transmission component 10 includes a first fork arm and a second fork arm, which are connected by a bushing. The bushing is mounted on the door leaf 2. The first fork arm is hinged to the lateral linkage 8, and the second fork arm is hinged to the push-pull linkage 9. A force transmission shaft is also provided on the door leaf 2. The force transmission shaft is connected to the first linkage component of the door lock system through a connecting rod or other structure. The up-and-down movement of the first linkage component is converted into the rotation of the force transmission shaft through the connecting rod or other structure. The bushing is fitted on the force transmission shaft and can rotate together with the force transmission shaft. That is, the force transmission shaft can drive the bushing to rotate. The rotation of the bushing can drive the lateral linkage 8 and the push-pull linkage 9 to move through the first fork arm and the second fork arm. When there are multiple push-pull linkages 9, the lateral linkage 8 can drive the other push-pull linkages 9 to move synchronously. The lateral linkage 8 is a movable part. In order to limit its movement, the present invention provides a limiting device 13 on the door leaf 2 relative to the end of the lateral linkage 8 to limit the lateral movement of the lateral linkage 8. The limiting device 13 is set at the theoretical movement limit position of the lateral linkage 8. A rubber head is provided at the end of the lateral linkage 8, so that the lateral linkage 8 and the limiting device 13 can achieve elastic contact, avoiding the problem of structural damage caused by hard impact.

[0029] The function of the limiting plate 11 is to restrict the movement of the ground sealing beam 3 (so that the ground sealing beam 3 can only rotate and not sway left and right due to the push-pull linkage 9). In one embodiment of the present invention, multiple sets of limiting plates 11 are provided, and all the limiting plates 11 are equally spaced. In addition, the lateral linkage 8, the push-pull linkage 9 and the transmission component 10 constitute a linkage unit, and multiple sets of linkage units are provided and spaced apart.

[0030] The push-pull linkage 9 of the present invention can be connected to the lateral linkage 8 and the ground sealing beam 3 through a universal joint. The universal joint includes a universal joint connecting seat, which is a U-shaped frame structure. A connecting ball is provided in the universal joint connecting seat. The bottom end of the push-pull linkage 9 is provided with a push-pull linkage 9 connecting hole that slides with the connecting ball. The universal joint connecting seat is fixedly connected to the ground sealing beam 3.

[0031] The sealing connection between the door leaf 2 and the door frame 1 can also adopt the following structural form: a door leaf groove is provided on the outer side (mainly the two sides and the fixed side) of the door leaf 2 facing the door frame 1, and a door leaf sealing strip 21 is provided in the door leaf groove. A door frame protrusion 22 is provided on the door frame 1 at the position corresponding to the door leaf sealing strip 21. After the door leaf 2 is closed, the door frame protrusion 22 can abut against the door leaf sealing strip 21 and cause the door leaf sealing strip 21 to undergo slight deformation. Based on the above structural design, a watertight connection between the door leaf 2 and the door frame 1 can be achieved.

[0032] Specifically, a trapezoidal groove is provided on the bottom surface of the ground sealing beam 3, and the cross-section of the sealing strip 4 is trapezoidal. The sealing strip 4 is detachably installed in the trapezoidal groove.

[0033] In this invention, the materials used for each structure are as follows: Door panel 2: Low carbon steel or stainless steel.

[0034] Door frame 1: Low carbon steel, available in aluminum and stainless steel.

[0035] The gasket used for sealing is made of silicone and has fully molded corners.

[0036] Locking mechanism: bronze or stainless steel pins and levers, stainless steel connecting rods, stainless steel gears.

[0037] Bushings and bearings for pins: bronze oil-impregnated thrust bearings.

[0038] Surface treatment: The aluminum sheet is coated with acrylic paint. Door frame 1 is sandblasted and coated with inorganic zinc primer. Other surface treatments include powder coating, polished stainless steel, and anodizing.

[0039] Hinge: Includes bronze oil-immersed thrust bearing and stainless steel hinge pin.

[0040] In this invention, the design requirements for each structure are as follows: A. Door frame 1. The frame is made of angle steel or flat steel and is used to install it on the outer surface of the wall.

[0041] B. The bottom door frame 1 is a flat strip embedded in the floor to provide a completely flush surface.

[0042] C. Door frame 1 shall have mounting holes for expansion anchors (options include a masonry subframe with welded anchors for embedding in concrete).

[0043] D. The blade of door frame 1 should be rounded to maximize sealing.

[0044] The door's size and design pressure direction should determine the number and type of locks. The pins are designed for on-site adjustment of the shim pressure.

[0045] As described above, this invention provides a thresholdless waterproof and airtight door. In this invention, the thresholdless waterproof and airtight door includes a door frame 1 and a door leaf 2. The door leaf 2 is hinged to the door frame 1 and can make watertight contact with both sides and the top edge of the door frame 1 in the closed state. A door lock system is provided on the door leaf 2 for locking the door leaf 2 to the door frame 1. A ground sealing assembly linked to the door lock system is also provided on the door leaf 2. The ground sealing assembly includes a ground sealing beam 3 hinged to the door leaf 2 and capable of rotating up and down relative to the door leaf 2. A pressure-deformable sealing strip 4 is provided on the bottom surface of the ground sealing beam 3. The ground sealing beam 3 can simultaneously achieve a sealed contact with the door leaf 2 and the ground. This invention provides a thresholdless waterproof and airtight door with a compression strip that can seal a flush floor surface. A sealing beam is installed on the door leaf 2 of the airtight door. When the ground is fully engaged with the sealing beam, the mechanical structure on the door leaf 2 will compress the sealing strip 4 at the bottom of the sealing beam by mechanical downward pressure, thereby achieving watertight contact between the door leaf 2 and the ground. After the fast-opening and closing locking mechanism is operated, the locking mechanism and the ground sealing beam 3 are linked to achieve rapid opening and closing of the door and maintain extremely low leakage for a relatively long period of time. After the sealing beam lifting mechanism is adjusted, the sealing beam and the door frame 1 should fit tightly, with a maximum gap of no more than 2 mm.

[0046] In the thresholdless protective airtight door provided by this invention, trapezoidal sponge sealing strips are placed in the rubber strip grooves on the left, right, and top sides of the door leaf 2. The pressing plate on the door frame 1 is squeezed by the locking mechanism to achieve a seal between the left, right, and top sides of the door leaf 2 and the door frame 1. A ground sealing mechanism is used to drive the flip-type ground sealing beam 3 to achieve a seal between the bottom of the door leaf 2 and the ground. According to tactical and technical requirements, the thresholdless protective airtight door cannot have a threshold protruding from the ground and is required to have quick conversion between peacetime and wartime functions. Through the above-mentioned technical measures of this invention, the door leaf 2 can form a complete sealing loop with the door frame 1. There is no steel-to-steel contact in this sealing loop, thus ensuring the reliability of the airtightness. Through the above structural design, when the ground sealing beam 3 is fully engaged with the ground, the door will mechanically compress the bottom sealing rubber strip 4. After the locking mechanism is operated to open and close quickly, the locking mechanism and the ground sealing beam 3 are linked to achieve rapid opening and closing of the door and extremely low leakage for a long period of time. Compared with traditional closed doors, the threshold-free waterproof airtight door provided by this invention has at least the following advantages: 1. There is no threshold protruding from the ground, whether in peacetime or wartime, facilitating the passage of large numbers of people; 2. A brand-new ground sealing mechanism is used to seal the ground, eliminating the need for a movable threshold or a lifting door leaf 2, allowing for quick conversion between peacetime and wartime functions; 3. The ground sealing mechanism is simple in design and easy to operate; a simple lever operation can achieve complex ground sealing functions. It also has a self-locking function, ensuring that the ground sealing beam 3 is in the open or closed position without any opening or closing force, preventing it from falling or lifting on its own.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A thresholdless, waterproof, airtight door, characterized in that, Includes a door frame (1) and a door leaf (2), wherein the door leaf is hinged to the door frame and can make watertight contact with the two sides and the top edge of the door frame in the closed state, and a door lock system is provided on the door leaf for locking the door leaf to the door frame; A ground sealing assembly that is linked to the door lock system is also provided on the door leaf. The ground sealing assembly includes a ground sealing beam (3) that is hinged to the door leaf and can be flipped up and down relative to the door leaf. A sealing strip (4) that can be deformed under pressure is provided on the bottom surface of the ground sealing beam. The ground sealing beam can achieve a sealed contact with the door leaf and the ground at the same time. A door leaf sealing contact plate (5) is provided at the bottom of the door leaf and on the side where the ground sealing beam is set. A sealing beam contact plate (6) is provided on the ground sealing beam, which can be flipped with the ground sealing beam and can make sealing contact with the door leaf sealing contact plate. The sealing connection between the door leaf and the ground sealing beam is achieved through the cooperation of the door leaf sealing contact plate and the sealing beam contact plate. A sealing layer (7) is provided on the side of the door leaf sealing contact plate that abuts against the sealing beam contact plate; The ground sealing assembly includes a transmission assembly; The transmission assembly includes a transverse linkage (8) that is linked to the door lock system and can perform transverse reciprocating motion, a push-pull linkage (9) for transmitting push-pull force, a transmission component (10) disposed between the transverse linkage and the push-pull linkage for transmitting power, and a limiting plate (11) for flipping and limiting the ground sealing beam. The limiting plate is provided with an arc-shaped groove, and a sliding block (12) is slidably engaged with the arc-shaped groove. The sliding block is fixedly disposed relative to the ground sealing beam. The push-pull linkage is connected to the ground sealing beam through a universal joint. The transmission component is hinged to the transverse linkage and the push-pull linkage. The limiting plates are arranged in pairs, with the two limiting plates in the same group being parallel and spaced apart. A sliding plate is provided between the two limiting plates in the same group. The sliding plate is fixedly installed to the ground sealing beam, and the sliding block is fixedly installed on the sliding plate. The transmission component includes a first fork arm and a second fork arm. The first fork arm and the second fork arm are connected by a bushing. The bushing is disposed on the door leaf. The first fork arm is hinged to the lateral linkage, and the second fork arm is hinged to the push-pull linkage. A limiting device (13) is provided on the door leaf relative to the end of the lateral linkage to limit the lateral movement of the lateral linkage. The limiting plates are provided in multiple sets, and all the limiting plates are arranged at equal intervals; The lateral linkage, the push-pull linkage, and the transmission component constitute a linkage unit, and multiple linkage units are provided and spaced apart. The universal joint includes a universal joint connector, which is a U-shaped frame structure. A connecting ball is provided inside the universal joint connector. The bottom end of the push-pull linkage is provided with a push-pull linkage connecting hole that slides with the connecting ball. The universal joint connector is fixedly connected to the ground sealing beam.

2. The thresholdless waterproof and airtight door according to claim 1, characterized in that, A trapezoidal groove is provided on the bottom surface of the ground sealing beam, and the sealing strip has a trapezoidal cross section. The sealing strip is detachably installed in the trapezoidal groove.

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