Steel structure protective sealed door and processing technology thereof

Abstract

The application discloses a steel structure protective sealed door and belongs to the technical field of protective doors. The technical scheme is as follows: a door frame is integrally poured with a concrete wall body; a door leaf is hinged to the door frame; a sealing strip is arranged on the door frame and on the side corresponding to the door leaf; a pressurizing assembly is arranged on the door leaf and is provided with a pressurizing seat; and a reinforcing structure is arranged in the door leaf and comprises a horizontal reinforcing plate and a vertical reinforcing plate. The pressurizing seat is arranged on the four side edges of the door leaf, the door frame is provided with a pressurizing groove, and the pressurizing assembly controls the pressurizing seat to abut against the side wall of the pressurizing groove. The application can improve the sealing performance of the four side edges of the door leaf.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of protective doors, and particularly relates to a steel structure protective airtight door and a processing technology thereof. BACKGROUND

[0002] The protective airtight door is arranged at the outermost side of an entrance and exit, has two functions of blocking shock waves and isolating toxic agents, is an extremely important component part in the whole civil defense engineering, plays a role of separating protective units, and ensures that the protective function of other protective units is not affected in the case that the protective function of one protective unit is lost in wartime. The protective airtight door in wartime is mainly used for preventing shock waves generated by nuclear weapons and conventional weapon explosions and various chemical toxic agents, and avoiding the entry of a damaged protective unit into another protective unit to cause personnel casualties or equipment damage.

[0003] The existing Chinese patent with the publication number CN110486088B discloses a subway interval flood-proof protective airtight partition door, which comprises a door leaf, one side of the door leaf is hinged to a wall body, a sealing strip is arranged on the lower side edge of the door leaf, and a lifting device for driving the door leaf to move up and down is connected to the door leaf.

[0004] The airtight door improves the sealing effect of the lower side of the door leaf, but the sealing effect of the left and right side and the upper side is not improved, and gas and liquid substances can still pass through the left and right side and the upper side, and improvement is needed. SUMMARY

[0005] The application aims to solve the above technical problems, and provides a steel structure protective airtight door which can improve the sealing performance of the four side edges of the door leaf.

[0006] The application provides a steel structure protective airtight door, which comprises:

[0007] A door frame is integrally poured with a concrete wall body;

[0008] A door leaf is hinged to the door frame;

[0009] A sealing strip is arranged on the door frame and on the corresponding side of the door leaf;

[0010] A pressurizing assembly is installed on the door leaf, and the pressurizing assembly is provided with a pressurizing seat;

[0011] A reinforcing structure is arranged in the door leaf, and the reinforcing structure comprises a horizontal reinforcing plate and a vertical reinforcing plate;

[0012] The pressurizing seat is distributed on the four side edges of the door leaf, the door frame is provided with a pressurizing groove, and the pressurizing assembly controls the abutment of the pressurizing seat and the side wall of the pressurizing groove.

[0013] The door frame and the concrete wall are integrally formed by pouring, providing installation stability for the sealed door. The door leaf is hingedly connected to the door frame, and the door leaf and the door frame are sealed by the sealing strip when the door leaf is closed. The sealing strip is wrapped around the door frame to ensure the sealing effect of the four sides of the door leaf. The pressurizing assembly controls the pressurizing seat to act on the side wall of the pressurizing groove, making the connection between the door leaf and the sealing strip more closely when the door leaf is closed. The reinforcing structure improves the overall structural strength of the door leaf, preventing the door leaf from bending and deforming when the pressurizing assembly pressurizes the door leaf. The reinforcing structure improves the bending resistance of the door leaf through the horizontal reinforcing plate and the vertical reinforcing plate, which are integrally connected to each other by welding.

[0014] Further, the door leaf comprises:

[0015] An outer shell;

[0016] An inner shell;

[0017] A wrapped shell connected between the outer shell and the inner shell;

[0018] When the door leaf is closed, the outer shell abuts against the door frame, and the inner shell is placed in the door frame. The reinforcing structure is placed in the outer shell and the inner shell.

[0019] The outer shell of the door leaf is composed of the outer shell, the inner shell, and the wrapped shell. The wrapped shell is welded or connected by screws, rivets, or other fasteners between the outer shell and the inner shell, ensuring the sealing effect and high connection stability at the connection. The outer shell and the inner shell each have corresponding horizontal reinforcing plates and vertical reinforcing plates, which are welded to the corresponding outer shell and inner shell.

[0020] Further, the pressurizing assembly comprises:

[0021] A moving seat placed in the door leaf;

[0022] A sliding rail slidably connected to the moving seat and connected to the corresponding reinforcing structure of the outer shell or the inner shell;

[0023] A connecting rod movably connected between the moving seat and the pressurizing seat;

[0024] The pressurizing seat is provided with a sliding part, which is placed at the middle position of the pressurizing seat. The door leaf is provided with a sliding groove corresponding to the sliding part.

[0025] The mobile seat is in sliding connection with the slide rail, the connecting rod is in hinged connection with the mobile seat and the pressurizing seat, the mobile seat moves along the slide rail, the connecting rod is pushed to move, the connecting rod acts on the pressurizing seat, the pressurizing seat is in movable connection between the sliding part and the sliding groove, when the mobile seat moves to the edge of the door leaf, the sliding part is first placed in the sliding groove to slide, the pressurizing seat is extended from the inner shell, when the sliding part moves to the stroke end of the sliding groove, the connecting rod continuously acts to make the pressurizing seat rotate around the axis of the sliding part, the pressurizing seat is in abutment with the side wall of the pressurizing groove, the mobile seats on the upper and lower sides of the door leaf are connected with the corresponding vertical reinforcing plates, and the mobile seats on the left and right sides of the door leaf are connected with the corresponding horizontal reinforcing plates.

[0026] Further, the pressurizing assembly further comprises:

[0027] The mounting seat is T-shaped, and the mounting seat is provided with a plug-in groove;

[0028] The base is in mounting connection with the mounting seat;

[0029] The rotating shaft is in movable connection with the base;

[0030] The rotating seat is provided with four rotating shafts which are uniformly distributed around the axis of the rotating shaft and are mounted on the rotating shaft;

[0031] The elastic assembly is connected between the rotating seat and the mobile seat;

[0032] The rotating handle is in mounting connection with the rotating shaft;

[0033] The plug-in groove is matched with the horizontal reinforcing plate and the vertical reinforcing plate, the mounting seat is in threaded connection with the horizontal reinforcing plate and the vertical reinforcing plate, and the elastic assembly is provided with an extension rod.

[0034] The plug-in groove on the mounting seat is plugged with the reinforcing structure, then fasteners such as bolts and nuts are used for fixing, the base is in mounting connection with the mounting seat through the fasteners such as bolts and nuts, so that the pressurizing assembly is stably mounted on the door leaf, and the stress is uniform, the rotating shaft is hinged with the base, the rotating shaft rotates around its own axis to make the rotating seat rotate around the axis of the rotating shaft, the rotating seat is connected with the pressurizing seat through the elastic assembly, the elastic assembly adopts a spring, when the pressurizing seat is retracted in the door leaf, the elastic assembly is in tension to pull the pressurizing seat inward, with the rotation of the rotating shaft, the elastic assembly changes to be in compression, so that the mobile seat and the pressurizing seat move outward, the rotating handle is convenient for controlling the rotation of the rotating shaft, the extension rod improves the connection stability between the rotating seat and the mobile seat, the extension rod is hinged with the rotating seat and the mobile seat, and more than two elastic assemblies are arranged between the rotating seat and the mobile seat in the same group, so that the stability of the mobile seat during movement is ensured.

[0035] Further, the door leaf is provided with a limiting seat corresponding to one of the rotating seats, and the limiting seat is distributed on both sides of the rotating seat and corresponds to the control of the pressurizing seat to shrink and pressurize.

[0036] The limiting seat facilitates the control of the rotating seat to rotate, and the two limiting seats are respectively arranged on both sides of the rotating seat, the rotating shaft prevents back-off to lock when the pressurizing seat is extended and pressurized, and the limiting seats corresponding to the rotating seats do not interfere with each other.

[0037] Further, the pressurizing seat comprises:

[0038] A limiting part is arranged at an end near the connecting rod;

[0039] A pressurizing block is arranged at an end away from the connecting rod and movably connected with the pressurizing seat;

[0040] A pressurizing spring is arranged between the pressurizing block and the pressurizing seat.

[0041] The limiting part limits the angle stroke between the connecting rod and the pressurizing seat, so that the connecting rod does not reverse when rotating the pressurizing seat around the sliding part, and the pressurizing seat and the side wall of the pressurizing groove have different abutting time due to the machining precision, and the pressurizing block and the pressurizing spring can control the abutting of the pressurizing block corresponding to all the pressurizing seats and the side wall of the pressurizing groove.

[0042] Further, the limiting seat corresponding to the control of the pressurizing seat to shrink is provided with a buckle part, and the rotating seat is provided with a shaft body corresponding to the buckle part.

[0043] The shaft body is clamped in the buckle part, the buckle part has elasticity, is a circular ring with an opening, and the shaft body is clamped from the opening.

[0044] The application also provides a processing technology of a steel structure protective sealed door, and the specific steps comprise:

[0045] S1, welding a reinforcing structure in the outer shell and the inner shell;

[0046] S2, installing the base, the mounting seat, the rotating shaft and the elastic assembly of the pressurizing assembly on the outer shell, installing the moving seat, the sliding rail, the pressurizing seat and the connecting rod on the inner shell, connecting the elastic assembly and the moving seat after corresponding the installed outer shell and inner shell;

[0047] S3, installing the edge covering shell to connect and install the outer shell and the inner shell.

[0048] The pressurizing assembly is installed on the door leaf, the pressurizing assembly between the outer shell and the inner shell is connected and installed, and then the edge covering shell is installed and welded, so that the door leaf is connected as a whole and the structural strength of the door leaf is ensured.

[0049] The beneficial effects of the present application are:

[0050] 1. The sealing strip is wrapped around the door frame, ensuring the sealing effect of the four sides of the door leaf. The pressurizing assembly controls the pressurizing seat to act on the side wall of the pressurizing groove, making the connection between the door leaf and the door frame and the sealing strip more closely when the door leaf is closed.

[0051] 2. The overall structural strength of the door leaf is improved by the reinforcing structure, preventing the door leaf from bending and deforming when the pressurizing assembly pressurizes the door leaf. The reinforcing structure improves the bending resistance of the door leaf through the horizontal reinforcing plate and the vertical reinforcing plate.

[0052] 3. The pressurizing seat is in contact with the side wall of the pressurizing groove through the rotating shaft, the elastic assembly, the moving seat, and the connecting rod, realizing the close closure between the door leaf and the door frame. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 The structure of the protective closed door of the present application is shown in the figure;

[0054] Figure 2 The structure of the door leaf of the present application is shown in the figure;

[0055] Figure 3 The partial structure of the base of the present application is shown in the figure;

[0056] Figure 4 The structure of the pressurizing seat of the present application is shown in the figure;

[0057] In the figure, 100, door frame; 110, pressurizing groove; 200, door leaf; 210, outer shell; 220, inner shell; 230, edge covering shell; 240, sliding groove; 300, sealing strip; 400, pressurizing assembly; 410, pressurizing seat; 411, sliding part; 412, limiting part; 413, pressurizing block; 414, pressurizing spring; 420, moving seat; 430, sliding rail; 440, connecting rod; 450, mounting seat; 460, base; 470, rotating shaft; 471, rotating seat; 472, rotating handle; 500, reinforcing structure; 510, horizontal reinforcing plate; 520, vertical reinforcing plate; 600, elastic assembly; 610, telescopic rod; 700, limiting seat; 710, buckle part; 720, shaft body. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0059] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] The embodiments of this application are described in detail below with reference to the accompanying drawings, through specific examples and application scenarios.

[0061] Example 1:

[0062] like Figure 1 , Figure 2 As shown in the figure, this application embodiment provides a steel structure protective airtight door, including:

[0063] The door frame is 100mm and is integrally cast with the concrete wall.

[0064] Door leaf 200 is hinged to door frame 100;

[0065] The sealing strip 300 is placed on the door frame 100 and on the corresponding side of the door leaf 200;

[0066] A pressurizing component 400 is installed on the door leaf 200, and the pressurizing component 400 is provided with a pressurizing base 410;

[0067] A reinforcing structure 500 is placed inside the door leaf 200, and the reinforcing structure 500 includes a horizontal reinforcing plate 510 and a vertical reinforcing plate 520;

[0068] The pressure seats 410 are distributed on the four sides of the door leaf 200, the door frame 100 is provided with a pressure groove 110, and the pressure assembly 400 controls the pressure seats 410 to abut against the side wall of the pressure groove 110.

[0069] The door frame 100 is integrally formed with the concrete wall, providing installation stability for the sealed door. The door leaf 200 is hingedly connected to the door frame 100. The door leaf 200 and the door frame 100 are sealed by the sealing strip 300 when the door leaf 200 is closed. The sealing strip 300 is wrapped around the door frame 100 to ensure the sealing effect of the four sides of the door leaf 200. The pressurizing assembly 400 controls the pressurizing seat 410 to act on the side wall of the pressurizing groove 110, so that the connection between the door leaf 200 and the sealing strip 300 is more closely when the door leaf 200 is closed. The reinforcing structure 500 improves the overall structural strength of the door leaf 200, so that the door leaf 200 is prevented from being deformed when the pressurizing assembly 400 pressurizes the door leaf 200. The reinforcing structure 500 improves the bending resistance of the door leaf 200 by the horizontal reinforcing plate 510 and the vertical reinforcing plate 520. The horizontal reinforcing plate 510 and the vertical reinforcing plate 520 are integrally connected to each other by welding.

[0070] Embodiment 2

[0071] As shown in Figure 2 the embodiment of the present application provides a steel structure protective sealed door. In addition to the above technical features, further, the door leaf 200 comprises:

[0072] an outer shell 210;

[0073] an inner shell 220;

[0074] a wrapped shell 230 connected between the outer shell 210 and the inner shell 220;

[0075] When the door leaf 200 is closed, the outer shell 210 abuts against the door frame 100, and the inner shell 220 is placed in the door frame 100. The reinforcing structure 500 is placed in the outer shell 210 and the inner shell 220.

[0076] The outer shell of the door leaf 200 is composed of the outer shell 210, the inner shell 220 and the wrapped shell 230. The wrapped shell 230 is connected to the outer shell 210 and the inner shell 220 by welding or fasteners such as screws and rivets, and the sealing effect and high connection stability of the connection are ensured. The outer shell 210 and the inner shell 220 each have a corresponding horizontal reinforcing plate 510 and a vertical reinforcing plate 520. The horizontal reinforcing plate 510 and the vertical reinforcing plate 520 are connected to the corresponding outer shell 210 and inner shell 220 by welding.

[0077] Embodiment 3

[0078] As shown in Figures 2-4 the embodiment of the present application provides a steel structure protective sealed door. In addition to the above technical features, further, the pressurizing assembly 400 comprises:

[0079] a moving seat 420 placed in the door leaf 200;

[0080] The slide rail 430 is in sliding connection with the moving seat 420 and in connection with the reinforcing structure 500 corresponding to the outer shell 210 or the inner shell 220.

[0081] The connecting rod 440 is in hinged connection between the moving seat 420 and the pressing seat 410.

[0082] The pressing seat 410 is provided with a sliding part 411, which is arranged at the middle position of the pressing seat 410, and the door leaf 200 is provided with a sliding groove 240 corresponding to the sliding part 411.

[0083] The moving seat 420 is in sliding connection with the slide rail 430, the connecting rod 440 is in hinged connection between the moving seat 420, the pressing seat 410, the moving seat 420 is moved along the slide rail 430, the connecting rod 440 is pushed to move, the connecting rod 440 acts on the pressing seat 410, the pressing seat 410 is in hinged connection between the sliding part 411 and the sliding groove 240, when the moving seat 420 moves to the edge of the door leaf 200, the sliding part 411 is first arranged in the sliding groove 240 to slide, the pressing seat 410 is extended from the inner shell 220, when the sliding part 411 moves to the stroke end of the sliding groove 240, the connecting rod 440 continuously acts to make the pressing seat 410 rotate around the axis of the sliding part 411, the pressing seat 410 is in abutment with the side wall of the pressing groove 110, the moving seat 420 on the upper side and the lower side of the door leaf 200 is in connection with the corresponding vertical reinforcing plate 520, and the moving seat 420 on the left side and the right side of the door leaf 200 is in connection with the corresponding horizontal reinforcing plate 510.

[0084] Further, the pressing assembly 400 further comprises:

[0085] The mounting seat 450 is in T-shaped, and the mounting seat 450 is provided with a plug-in groove.

[0086] The base 460 is in mounting connection with the mounting seat 450.

[0087] The rotating shaft 470 is in hinged connection with the base 460.

[0088] The rotating seat 471 is provided with four rotating shafts 470 which are uniformly distributed around the axis of the rotating shaft 470 and are mounted on the rotating shaft 470.

[0089] The elastic assembly 600 is in connection between the rotating seat 471 and the moving seat 420.

[0090] The rotating handle 472 is in mounting connection with the rotating shaft 470.

[0091] The plug-in groove is matched with the horizontal reinforcing plate 510 and the vertical reinforcing plate 520, the mounting seat 450 is in threaded connection with the horizontal reinforcing plate 510 and the vertical reinforcing plate 520, and the elastic assembly 600 is provided with an extension rod 610.

[0092] The base 460 is installed and connected with the mounting seat 450 through bolts, nuts and other fasteners, and the pressurizing assembly 400 is stably installed on the door leaf 200 through the mounting seat 450 and the reinforcing structure 500, and is fixed through the plug-in slots on the mounting seat 450 and the reinforcing structure 500, and then fixed through bolts, nuts and other fasteners, and the base 460 is installed and connected with the mounting seat 450 through bolts, nuts and other fasteners, so that the pressurizing assembly 400 is stably installed on the door leaf 200, and the stress is uniform, the rotating shaft 470 is hinged between the base 460, the rotating shaft 470 rotates around its own axis, the rotating seat 471 rotates around the axis of the rotating shaft 470, the rotating seat 471 is connected with the pressurizing seat 410 through the elastic assembly 600, the elastic assembly 600 adopts a spring, when the pressurizing seat 410 is retracted in the door leaf 200, the elastic assembly 600 is in tension, the pressurizing seat 410 is pulled inward, with the rotation of the rotating shaft 470, the elastic assembly 600 changes to be in compression, the moving seat 420 and the pressurizing seat 410 move outward, the rotating handle 472 is convenient for controlling the rotation of the rotating shaft 470, the connecting stability between the rotating seat 471 and the moving seat 420 is improved through the telescopic rod 610, the telescopic rod 610 is hinged between the rotating seat 471 and the moving seat 420, and more than two elastic assemblies 600 are arranged between the rotating seat 471 and the moving seat 420 in the same group, so as to ensure the stability of the moving seat 420 when moving.

[0093] Further, the door leaf 200 is provided with a limiting seat 700, the limiting seat 700 corresponds to one of the rotating seats 471, and the limiting seat 700 is distributed on both sides of the rotating seat 471 and corresponds to the rotating seat 471 to control the retraction and pressurization of the pressurizing seat 410.

[0094] The limiting seat 700 is convenient for controlling the rotating stroke of the rotating seat 471, two limiting seats 700 are respectively arranged on both sides of the rotating seat 471, the rotating shaft 470 is prevented from backfolding and locked when the pressurizing seat 410 is extended and pressurized, and the limiting seats 700 corresponding to the rotating seats 471 do not interfere with each other.

[0095] Further, the pressurizing seat 410 comprises:

[0096] The limiting part 412 is arranged at one end near the connecting rod 440;

[0097] The pressurizing block 413 is arranged at one end away from the connecting rod 440 and movably connected with the pressurizing seat 410;

[0098] The pressurizing spring 414 is arranged between the pressurizing block 413 and the pressurizing seat 410.

[0099] The angle stroke between the connecting rod 440 and the pressing seat 410 is limited by the limiting part 412, so that the connecting rod 440 does not appear reverse rotation when controlling the pressing seat 410 to rotate around the sliding part 411. Due to the machining precision, the abutting time of the pressing seat 410 and the side wall of the pressing groove 110 is different, and the abutting of the pressing block 413 and the pressing spring 414 can control the abutting of all the pressing blocks 413 and the side wall of the pressing groove 110.

[0100] Further, the rotating seat 471 is provided with a buckle part 710 corresponding to the limiting seat 700 in the contraction state of the pressing seat 410, and the rotating seat 471 is provided with a shaft body 720 corresponding to the buckle part 710.

[0101] The shaft body 720 is clamped in the buckle part 710, so that the pressing seat 410 can be placed in the door leaf 200. The buckle part 710 has elasticity and is a circular ring with an opening, and the shaft body 720 is clamped from the opening.

[0102] Embodiment 4:

[0103] The application also provides a processing technology of a steel structure protective sealed door, and the specific steps include:

[0104] S1, welding the reinforcing structure 500 in the outer shell 210 and the inner shell 220;

[0105] S2, installing the base 460, the mounting seat 450, the rotating shaft 470 and the elastic assembly 600 of the pressing assembly 400 on the outer shell 210, installing the moving seat 420, the sliding rail 430, the pressing seat 410 and the connecting rod 440 on the inner shell 220, connecting the elastic assembly 600 and the moving seat 420 after corresponding the installed outer shell 210 and the inner shell 220.

[0106] S3, installing the edge covering shell 230 to connect the outer shell 210 and the inner shell 220.

[0107] By installing the pressing assembly 400 on the door leaf 200, connecting the pressing assembly 400 between the outer shell 210 and the inner shell 220, and then installing and welding the edge covering shell 230, the door leaf 200 is connected as a whole, so as to ensure the structural strength of the door leaf 200.

[0108] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the methods and apparatus of the present embodiments are not limited by the order of the steps or the sequence for performing the steps, as some steps can occur in different orders and / or concurrently with one another; for example, described methods can be performed in an order other than that described, and / or additional steps can be added, or steps can be omitted, or a combination thereof. Also, characteristics described in relation to certain examples can be combined in other examples.

[0109] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A steel structure protective airtight door, characterized in that, include: The door frame (100) is integrally cast with the concrete wall; The door leaf (200) is hinged to the door frame (100); A sealing strip (300) is placed on the door frame (100) and on the corresponding side of the door leaf (200); A pressurizing assembly (400) is installed on the door leaf (200), and the pressurizing assembly (400) is provided with a pressurizing seat (410). A reinforcing structure (500) is placed inside the door leaf (200), the reinforcing structure (500) including a horizontal reinforcing plate (510) and a vertical reinforcing plate (520); The pressure seats (410) are distributed on the four sides of the door leaf (200), the door frame (100) is provided with a pressure groove (110), and the pressure assembly (400) controls the pressure seats (410) to abut against the side wall of the pressure groove (110); The pressurization assembly (400) includes: A movable seat (420) is placed inside the door leaf (200); The slide rail (430) is slidably connected to the movable seat (420) and connected to the reinforcing structure (500) corresponding to the outer shell (210) or the inner shell (220); The connecting rod (440) is movably connected between the movable seat (420) and the pressure seat (410); The pressure seat (410) is provided with a sliding part (411), the sliding part (411) is located in the middle position of the pressure seat (410), and the door leaf (200) is provided with a sliding groove (240) corresponding to the sliding part (411). The limiting part (412) is provided on the pressure seat (410) and is located at the end near one end of the connecting rod (440); The pressure block (413) is located inside the pressure seat (410), at the end away from the connecting rod (440), and is movably connected to the pressure seat (410); A pressure spring (414) is placed between the pressure block (413) and the pressure seat (410).

2. The steel structure protective airtight door according to claim 1, characterized in that, The door leaf (200) includes: Outer shell (210); Inner shell (220); The edge-sealing housing (230) is connected between the outer shell (210) and the inner shell (220); When the door (200) is closed, the outer shell (210) abuts against the door frame (100), the inner shell (220) is placed inside the door frame (100), and the reinforcing structure (500) is placed inside the outer shell (210) and the inner shell (220).

3. The steel structure protective airtight door according to claim 2, characterized in that, The pressurization assembly (400) also includes: The mounting base (450) is T-shaped and is provided with a plug-in slot; The base (460) is mounted and connected to the mounting bracket (450); A rotating shaft (470) is movably connected to a base (460); Four rotating seats (471) are provided, which are evenly distributed around the axis of the rotating shaft (470) and installed on the rotating shaft (470); An elastic component (600) is connected between a rotating base (471) and a movable base (420); The rotating handle (472) is mounted and connected to the rotating shaft (470); The insertion slot is adapted to the horizontal reinforcing plate (510) and the vertical reinforcing plate (520), the mounting base (450) is connected to the horizontal reinforcing plate (510) and the vertical reinforcing plate (520) by a thread, and the elastic component (600) is provided with a telescopic rod (610).

4. The steel structure protective airtight door according to claim 3, characterized in that, The door leaf (200) is provided with a limiting seat (700), which corresponds to one of the rotating seats (471). The limiting seats (700) are distributed on both sides of the rotating seat (471) and respectively control the compression and pressurization states of the pressure seat (410) of the rotating seat (471).

5. The steel structure protective airtight door according to claim 4, characterized in that, The rotating seat (471) controls the pressure seat (410) to retract state. The corresponding limiting seat (700) is provided with a buckling part (710), and the rotating seat (471) is provided with a shaft (720) corresponding to the buckling part (710).

6. A processing method applicable to the steel structure protective airtight door as described in claim 5, characterized in that, The specific steps include: S1, Weld a reinforcing structure (500) inside the outer shell (210) and the inner shell (220); S2, install the base (460), mounting base (450), rotating shaft (470), and elastic component (600) of the pressurizing component (400) onto the outer shell (210), install the movable seat (420), slide rail (430), pressurizing seat (410), and connecting rod (440) onto the inner shell (220), align the installed outer shell (210) and inner shell (220), and connect the elastic component (600) to the movable seat (420); S3, Install the edge-sealing shell (230) to install and connect the outer shell (210) and the inner shell (220).

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