Protective sealing structure for civil air defense construction of metro

Abstract

According to the protective sealing structure for the subway civil air defense engineering, a composite structure of the multiple layers of rubber sealing rings and the nested metal supporting pieces is arranged on the outer surface of the outer shell, so that the limitation that traditional single-layer sealing depends on door leaf matching is broken through, and energy is absorbed through layer-by-layer deformation under the shock wave negative pressure environment through the multi-layer nested design of the sealing rings; a three-dimensional anti-deformation system is formed by matching with the annular metal frame of the supporting piece, 50-75 kJ impact energy can be borne, a sealing interface does not lose efficacy, and the problem that an existing sealing structure is prone to instability due to impact is solved; the circular / square switchable design of the outer shell is matched with different engineering scenes, a connecting flange is integrated at the bottom of a standardized mounting pipe, a conventional pipeline is compatible through thread / welding connection, rapid modular butt joint with ventilation equipment, electric power equipment and other equipment is achieved in cooperation with a top connecting hole, and the structural complexity of a sliding rail type plugging facility is avoided; reinforcing ribs are uniformly distributed on the inner wall to form grid support, so that the compressive strength of the whole structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model provides a subway civil air defense engineering protection airtight structure belongs to technical field, especially relates to a subway civil air defense engineering protection airtight structure. BACKGROUND

[0002] The subway civil air defense engineering protection airtight structure is an important component of the subway civil air defense engineering, and its main function is to prevent the shock wave, chemical toxicant and the like produced by nuclear weapons and conventional weapons explosion in wartime from entering the subway interior, and to protect the safety of personnel and equipment. These structures are used for normal operation of the subway in peacetime, and realize the protection function through peacetime-war conversion measures in wartime. The subway civil air defense engineering not only plays the role of evacuation channel and material reserve in wartime, but also can be used as a shelter in special circumstances such as natural disasters, and provides the disaster prevention and reduction function.

[0003] The existing subway civil air defense engineering protection airtight structure mainly includes a protection airtight door, an airtight door and a slide rail type blocking plate. These structures are usually composed of a door leaf, a door frame, a lock and a hinge, and emphasize the sealing performance and the impact resistance. For example, the steel structure protection airtight door without door sill realizes sealing through the lap joint of the door leaf and the door frame, but the sealing performance thereof depends on the close fit of the door leaf and the door frame, and the sealing failure is easily caused by the shock wave negative pressure. The clean ventilation protection airtight door has both ventilation and protection functions, but the complex design increases the maintenance difficulty and cost. In addition, the slide rail type blocking facility is convenient to install and maintain, but has high requirements for construction precision, and it is difficult to quickly convert into the wartime state in special environment due to the complex structure. These existing structures have the problems of insufficient sealing performance, insufficient structural strength, complex installation and poor adaptability, which limit the wide application thereof in different environments. CONTENT OF THE UTILITY MODEL

[0004] In order to make up for the deficiency of the prior art, the utility model provides a subway civil air defense engineering protection airtight structure, which solves the problems of insufficient sealing performance, insufficient structural strength, complex installation and poor adaptability of the existing device.

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme: a subway civil air defense engineering protection airtight structure, comprising an outer shell, characterized in that: a plurality of sealing rings are arranged on the outer surface of the outer shell, the sealing rings are nested with support pieces inside, an installation pipe is connected to the bottom of the outer shell, the installation pipe is used for connecting external structures or realizing conveying function, and the shape of the outer shell is not limited, including but not limited to a circular shape, a square shape or other shapes.

[0006] Preferably, the sealing rings are of a multilayer structure, and each layer of the sealing rings is connected through nesting to form a sealing layer.

[0007] Preferably, the support is a ring structure nested inside the sealing ring to enhance the structural strength of the sealing ring.

[0008] Preferably, the mounting pipe is a hollow structure connected to the bottom of the outer shell by screwing or welding, and a connecting flange is arranged on the outer wall of the mounting pipe to connect with external pipelines.

[0009] Preferably, the top of the outer shell is provided with a connecting hole for connecting with external equipment.

[0010] Preferably, the sealing ring is made of rubber, and the support is made of metal.

[0011] Preferably, a plurality of reinforcing ribs are arranged on the inner wall of the outer shell to enhance the structural strength of the outer shell.

[0012] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0013] The device breaks through the limitation of traditional single-layer sealing relying on door leaf cooperation by arranging a plurality of rubber sealing rings and nested metal supports on the outer surface of the outer shell. The multi-layer nested design of the sealing ring absorbs energy through layer-by-layer deformation in the shock wave negative pressure environment, and the ring-shaped metal frame of the support forms a three-dimensional anti-deformation system, which can withstand 50-75 kJ of impact energy without failure of the sealing interface, solving the problem that the existing sealing structure is prone to instability due to impact. The circular / square switchable design of the outer shell matches different engineering scenes, the bottom of the standardized mounting pipe is integrated with a connecting flange, the threaded / welded connection is compatible with conventional pipelines, and the top connecting hole is matched with ventilation, power and other equipment to realize rapid modularization docking, avoiding the structural complexity of the sliding rail type sealing facility. At the same time, the uniform reinforcing ribs on the inner wall form a grid support, which improves the overall structural compression strength by more than 40%, and the flange centering device can still realize rapid wartime state conversion under the condition of no high-precision construction, comprehensively solving the contradiction between sealing performance, structural strength and installation adaptability.

[0014] Other advantages, objects, and features of the present application will be apparent to those skilled in the art in view of the following detailed description and drawings, and to some extent will be apparent from the following detailed description and drawings, or can be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Figure 1 is a schematic view of the installation of the protective sealing structure for a subway civil air defense engineering according to the present application;

[0016] Figure 2 Figure 2 is a sectional view of the protective sealing structure for a subway civil air defense engineering according to the present application.

[0017] Figure 3 Figure 8 is an exploded view of the protective and airtight structure for a subway civil air defense engineering according to the present application;

[0018] Figure 4 Figure 9 is an exploded view of the sealing ring part of the protective and airtight structure for a subway civil air defense engineering according to the present application.

[0019] As shown in the figure:

[0020] Housing; 2. Sealing ring; 3. Support; 4. Mounting tube; 5. Connection hole; 6. Connection flange; 7. Reinforcing rib. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] As Figure 1 and Figure 2As shown, a subway civil air defense engineering protection sealing structure, comprising an outer shell 1, the outer surface of the outer shell 1 is provided with a plurality of sealing rings 2, the sealing ring 2 is nested with a support 3, the bottom of the outer shell 1 is connected with a mounting pipe 4, the mounting pipe 4 is used for connecting external structure or realizing conveying function, the shape of the outer shell 1 is not limited, including but not limited to circular, square or other shapes. The sealing ring 2 is a multilayer structure, each layer of sealing ring 2 is connected by nesting, forming a sealing layer. The support 3 is an annular structure, nested in the sealing ring 2, used to enhance the structural strength of the sealing ring 2. The mounting pipe 4 is a hollow structure, connected with the bottom of the outer shell 1 by screwing or welding, the outer wall of the mounting pipe 4 is provided with a connecting flange 6, the connecting flange 6 is used for connecting with external pipeline. The top of the outer shell 1 is provided with a connecting hole 5, the connecting hole 5 is used for connecting with external equipment. The material of the sealing ring 2 is rubber, the material of the support 3 is metal. The inner wall of the outer shell 1 is provided with a plurality of reinforcing ribs 7, the reinforcing ribs 7 are used to enhance the structural strength of the outer shell 1. The multilayer sealing ring and the support are matched to realize the double improvement of efficient sealing and structural strength, and the shape of the outer shell is not limited, which can adapt to different installation environments, has wide applicability and practicality.

[0025] In the embodiment, the sealing ring 2 and the outer shell 1 are fixed by bolts or welding, ensuring the reliability of the sealing performance. The outer wall of the mounting pipe 4 is provided with a connecting flange 6, which is used for connecting with external pipeline, facilitating quick installation and disassembly, improving the flexibility and convenience of the device. The top of the outer shell 1 is provided with a connecting hole 5, which is used for connecting with external equipment, further expanding the application scenarios of the device. The material of the sealing ring 2 is rubber, which has good elasticity and sealing performance. The material of the support 3 is metal, providing strong structural support to ensure that the sealing ring 2 will not deform or be damaged when impacted. The inner wall of the outer shell 1 is provided with a plurality of reinforcing ribs 7, which are evenly distributed to effectively enhance the overall structural strength of the outer shell 1, enabling it to withstand greater pressure and impact force. The multilayer sealing ring 2 and the support 3 are matched to significantly improve the sealing performance and structural strength, and the flexible shape of the outer shell 1 and the convenient installation design enhance the applicability and installation convenience of the device, effectively solving the problems of insufficient sealing performance, insufficient structural strength, complex installation and poor adaptability of existing devices.

[0026] As Figure 3 and Figure 4As shown, a subway civil air defense engineering protection sealing structure, the outer shell 1 as the main body of the whole structure, the outer surface is provided with a plurality of sealing ring 2, these sealing ring 2 not only enhances the sealing performance, also through its internal nesting support 3 improves the stability of the structure. The installation pipe 4 is connected at the bottom of the outer shell 1, it is hollow structure, with the bottom of the outer shell 1 is connected by screw thread or welding mode, ensure the firmness of connection. The outer wall of the installation pipe 4 is provided with a connecting flange 6, facilitate with external pipeline connection, realize the conveying function. The top of the outer shell 1 is provided with a connecting hole 5, for connecting with external equipment, further expand the application scenario of the structure. The sealing ring 2 adopts rubber material, the support 3 adopts metal material, this material combination not only guarantees the sealing, also enhances the structural strength. The inner wall of the outer shell 1 is provided with a plurality of reinforcing ribs 7, these reinforcing ribs 7 are evenly distributed, effectively enhance the overall structural strength of the outer shell 1, make it can bear greater pressure and impact force.

[0027] In the embodiment, the sealing ring 2 and the outer shell 1 are fixed by bolts or welding, ensuring the reliability of the sealing performance. The outer wall of the installation pipe 4 is provided with a connecting flange 6, which is used to connect with the external pipeline, facilitating quick installation and disassembly, improving the flexibility and convenience of the device. The top of the outer shell 1 is provided with a connecting hole 5, which is used to connect with external equipment, further expanding the application scenario of the device. The material of the sealing ring 2 is rubber, which has good elasticity and sealing performance. The material of the support 3 is metal, providing strong structural support to ensure that the sealing ring 2 will not deform or be damaged when impacted. The inner wall of the outer shell 1 is provided with a plurality of reinforcing ribs 7, which are evenly distributed, effectively enhancing the overall structural strength of the outer shell 1, making it able to withstand greater pressure and impact force.

[0028] From the perspective of innovation and implementation points, the subway civil air defense engineering protection sealing structure has the following beneficial effects:

[0029] Efficient sealing and structural strength improvement: through the cooperation of multiple sealing rings 2 and supports 3, the sealing performance and structural strength are significantly improved, effectively solving the problems of insufficient sealing performance and insufficient structural strength of existing devices.

[0030] Flexible outer shell shape: the shape of the outer shell 1 is not limited and can be circular, square or other shapes, which can adapt to different installation environments and has wide applicability.

[0031] Convenient installation design: the installation pipe 4 is connected with the bottom of the outer shell 1 through threading or welding, ensuring the firmness of the connection. The outer wall of the installation pipe 4 is provided with a connecting flange 6, which is convenient for connecting with external pipelines to realize the conveying function. The top of the outer shell 1 is provided with a connecting hole 5, which is used for connecting with external equipment, further expanding the application scenarios of the structure.

[0032] Material optimization: the sealing ring 2 is made of rubber material, and the support 3 is made of metal material. This material combination not only ensures the sealing property, but also enhances the structural strength.

[0033] Reinforcing rib design: the inner wall of the outer shell 1 is provided with a plurality of reinforcing ribs 7, which are evenly distributed to effectively enhance the overall structural strength of the outer shell 1, so that it can withstand greater pressure and impact force.

[0034] In the above technical solution, the sealing ring and the support: the sealing ring is made of multiple layers of rubber material, and the thickness of each layer can be adjusted according to actual needs, usually 10-20mm. The support is a ring-shaped metal structure with a thickness of 5-10mm, which ensures that the sealing ring will not deform when impacted. The installation pipe and the connecting flange: the diameter of the installation pipe can be selected according to actual needs, usually 100-300mm. The thickness of the connecting flange is 10-20mm, which is connected by bolts to ensure the firmness of the connection. The outer shell and the reinforcing rib: the thickness of the outer shell is 10-30mm, and the material is high-strength steel to ensure the stability of the overall structure. The reinforcing ribs are evenly distributed on the inner wall of the outer shell with a spacing of 100-200mm and a thickness of 5-10mm. Specific model and parameters: TFM35355: the hole width is 3500mm, the hole height is 3500mm, and the resistance level is 5. APMFM41456: the hole width is 4100mm, the hole height is 4500mm, and the resistance level is 6.

[0035] Based on the above technical solution, to perfect the implementation of the device and clarify the connection relationship with the prior art, the existing technical means and cooperative operation process are as follows:

[0036] I. Supplementary of prior art

[0037] Traditional sealing structure implementation

[0038] In the existing subway civil air defense engineering, the sealing ring is usually made of single-layer rubber material and directly attached to the surface of the outer shell, which is fixed by welding or bolts.

[0039] Existing support structure technical means

[0040] The protective door frame as recorded in the "People's Air Defense Engineering Protective Equipment Selection Atlas" adopts uniformly distributed transverse reinforcing ribs with a spacing of 200 mm and a thickness of 8 mm. However, it is not designed in coordination with the sealing structure, leading to the separation of the sealing layer and the structural layer, and the limited impact resistance.

[0041] Existing standards for installation process

[0042] According to the "People's Air Defense Engineering Construction and Acceptance Specification", traditional flange connection requires secondary welding reinforcement, the flange thickness needs to be ≥15 mm, and the bolt hole spacing is executed according to the ISO 7005 standard. The connection flange of this scheme is directly integrated into the installation pipe, using precision finishing plane sealing technology, without the need for secondary processing.

[0043] Second, the cooperative operation process of the device and existing technology

[0044] Assembly of sealing ring assembly

[0045] Use existing hydraulic nesting equipment to press metal support into rubber sealing ring cavity, control pressure range 20-30 MPa

[0046] Use existing bolt fixing technology to fix multiple sealing rings layer by layer on the outer shell, and implement torque detection between each layer

[0047] Installation pipe connection process

[0048] When using welding connection, perform full penetration weld standard in GB 50661-2011 "Steel Structure Welding Specification"

[0049] Use existing flange centering device for pipe butt joint to ensure flange parallelism ≤0.3 mm

[0050] Reinforcing rib manufacturing standards

[0051] Use existing laser cutting technology to process reinforcing ribs, following the parameters:

[0052] Cutting speed: 8-12 m / min

[0053] Laser power: 3-4 kW

[0054] Cutting angle: 88°-90°

[0055] Weld reinforcing ribs according to GB 50205-2020 standard, weld height ≥5 mm

[0056] Three, use specifications for existing devices

[0057] Pressure test system

[0058] Use existing SCHENCK HPG1900 hydrostatic testing machine for sealing test:

[0059] Step by step pressurized to 1.5 times of design pressure

[0060] Holding time ≥ 30 min, leakage rate ≤ 0.5%

[0061] Impact load test

[0062] Use INSTRON 9350 drop hammer impact testing machine to simulate explosion impact:

[0063] Impact energy is set according to the resistance level

[0064] Deformation detection uses laser displacement sensor, and the maximum deformation is ≤ 3mm

[0065] Four, typical operating procedures

[0066] On-site installation stage:

[0067] Use hoisting equipment to position the outer shell, and ensure that the installation flatness error is ≤ 2mm / m through total station

[0068] Use electric torque wrench to tighten the sealing ring bolt, load three times to 100N·m

[0069] Pipeline connection stage:

[0070] Use RIDGID 300 flange face processing machine to carry out on-site finishing of the connecting flange, Ra≤3.2μm

[0071] Use GRAPLO FCS flange sealing pad installation system to inject liquid sealant, and the solidification time is controlled to be 15±2min

[0072] Operation and maintenance stage:

[0073] Use ultrasonic detector to detect the integrity of the weld every quarter, with a frequency range of 2-5MHz

[0074] Use stress detector to monitor the stress value of the reinforcing rib during annual maintenance, and the maximum allowable stress is ≤ 235MPa

[0075] In use, the use steps of the device include: firstly, using the hydraulic nesting device to press the metal support into the inner cavity of the multi-layer rubber sealing ring at a pressure of 20-30 MPa, and fixing it on the outer surface of the outer shell by ISO 4014 standard bolts or welding at a torque value of 80-100 N·m; then, according to the engineering requirements, selecting a circular or square outer shell, positioning it using hoisting equipment, calibrating the flatness to an error of ≤2 mm / m using a total station instrument, and fixing the installation pipe with a connecting flange on the bottom of the shell through screw threads or welding; after adjusting the parallelism to ≤0.3 mm using a flange centering device in the pipeline connection stage, injecting liquid sealant into the flange surface and curing for 15±2 min; before running, using a SCHENCK HPG1900 hydrostatic testing machine to perform step-by-step pressurization to 1.5 times the design pressure, maintaining pressure for 30 min to detect a leakage rate of ≤0.5%, and using an INSTRON 9350 drop hammer impact testing machine to apply an impact energy of 50-75 kJ to verify a deformation amount of ≤3 mm; in daily maintenance, using an ULTRA PRO 9000 ultrasonic detector to scan the welds every quarter, and using a SCHMIDT SSG stress detector to monitor the stress value of the reinforcing rib ≤235 MPa during annual maintenance, so as to realize efficient sealing and structural stability guarantee in the whole life cycle.

[0076] Although the utility model has disclosed as above with preferred embodiments, it is not intended to limit the utility model, and anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be defined by the claims.

Claims

1. A protective and airtight structure for subway civil air defense engineering, comprising an outer shell (1), characterized in that: The outer surface of the outer shell (1) is provided with several sealing rings (2), the sealing rings (2) are nested with support pieces (3), the bottom of the outer shell (1) is connected with a mounting pipe (4), the mounting pipe (4) is used for connecting external structure or realizing conveying function, the shape of the outer shell (1) is not limited.

2. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The sealing ring (2) is a multilayer structure, each layer of sealing ring (2) is connected by nesting mode, forming a sealing layer.

3. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The support piece (3) is a ring structure, nested in the sealing ring (2), used for enhancing the structural strength of the sealing ring (2).

4. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The mounting pipe (4) is a hollow structure, connected with the bottom of the outer shell (1) by screw thread or welding mode, the outer wall of the mounting pipe (4) is provided with a connecting flange (6), the connecting flange (6) is used for connecting with external pipeline.

5. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The top of the outer shell (1) is provided with a connecting hole (5), the connecting hole (5) is used for connecting with external equipment.

6. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The material of the sealing ring (2) is rubber, the material of the support piece (3) is metal.

7. The protective sealing structure for subway civil air defense engineering according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with several reinforcing ribs (7), the reinforcing ribs (7) are used for enhancing the structural strength of the outer shell (1).

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