Flood-proof protective air-tight door sealing device of composite structure

Abstract

The invention belongs to the technical field of flood prevention and water retaining, and discloses a flood prevention protective air-tight door sealing device of a composite structure, which comprises a door frame and a door leaf which are arranged on a structural wall body, a check ring is arranged on the door frame, a pressing plate is arranged on the door leaf, and a sealing device is arranged in the check ring; the sealing device comprises extrusion rubber located on the outer layer structure and foaming rubber located on the inner layer structure, and an inner lip edge and an outer lip edge both facing the water inflow direction are formed on the extrusion rubber. After the door leaf is closed in place, the pressing plate compresses the foaming rubber to generate compression deformation and seal the normal-pressure gas; the inner lip edge and the outer lip edge are compressed by the door leaf to deform at the same time, external water pressure extrudes attaching gaps between the inner lip edge and the door leaf and between the outer lip edge and the door leaf, and high-pressure water is sealed. According to the air-tight door sealing device, foaming rubber and extrusion rubber which are different in hardness are compounded, and meanwhile the gas sealing performance of a flood-proof protective air-tight door under normal pressure and the liquid sealing performance under a high-pressure water head are guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of flood prevention and water blocking, and more specifically relates to a composite structure flood prevention and protective airtight door sealing device. Background Technology

[0002] Many underground spaces are civil defense projects. According to the requirements of civil defense projects, protective airtight doors must be installed at the entrances and exits. In the case of flood prevention requirements, they also need to have flood prevention functions. Conventional protective airtight doors have the airtight performance of preventing toxic gases under normal pressure and have a certain degree of sealing. However, when used as flood prevention protective airtight doors, they need to withstand high water head pressure. Conventional sealing strips are insufficient in sealing performance under high water head pressure.

[0003] The sealing device between the door leaf and the door frame of a conventional protective airtight door is made of foamed rubber. Foamed rubber has a porous structure and is relatively soft. Under high pressure, water can easily seep through the porous structure to the other side of the sealing device. At the same time, because foamed rubber is relatively soft, it is not elastic enough when compressed and deformed, and it is not enough to resist the pressure of high-pressure water, thus causing water leakage at the seal. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention aims to provide a composite structure for a flood-proof and protective airtight door sealing device. This device combines foamed rubber and extruded rubber of different hardnesses, ensuring both the gas sealing performance under normal pressure and the liquid sealing performance under high pressure.

[0005] To achieve the above objectives, the present invention employs the following technical measures:

[0006] A composite structure flood-proof and airtight door sealing device includes a door frame and a door leaf installed on a structural wall. The door frame is provided with a retaining ring, and the door leaf is provided with a pressure plate. A sealing device is installed in the retaining ring. The sealing device includes extruded rubber in the outer layer and foamed rubber in the inner layer. The extruded rubber has an inner lip and an outer lip, both facing the direction of incoming water. After the door leaf is closed, the pressure plate compresses the foamed rubber to produce compression deformation and seals the gas at normal pressure. The inner lip and outer lip are simultaneously compressed and deformed by the door leaf. External water pressure squeezes the gap between the inner lip, outer lip and the door leaf, sealing the high-pressure water.

[0007] Furthermore, the inner lip and outer lip are asymmetrical lip structures, with the outer lip being closer to the water flow direction and the angle between the outer lip and the water flow direction being smaller than the angle between the inner lip and the water flow direction.

[0008] Furthermore, the length of the outer lip is longer than the length of the inner lip.

[0009] Preferably, the extruded rubber and foamed rubber are formed independently and then bonded together to form an integral structure.

[0010] Furthermore, the hardness of the extruded rubber is 45-55, and the hardness of the foamed rubber is 30-40.

[0011] Preferably, after the door leaf is closed, it contacts the retaining ring to transfer the external resistance of the door leaf to the door frame and structural wall.

[0012] The composite structure flood-proof and airtight door sealing device of the present invention has at least the following beneficial effects:

[0013] 1. The composite structure of the anti-flood protective airtight door sealing device of the present invention combines foamed rubber and extruded rubber of different hardness. The foamed rubber with lower hardness is used for gas sealing under normal pressure, without affecting the anti-toxic gas performance of the airtight door itself. The extruded rubber with higher hardness is used for liquid sealing under high pressure water head, playing the role of high pressure anti-flooding.

[0014] 2. The extrusion rubber part of the composite structure anti-flood protective airtight door sealing device of the present invention adopts an asymmetrical lip structure. The water pressure on the incoming water side makes the lip part and its contact surface with the door leaf more and more tightly pressed, further improving the anti-flood sealing ability under high water head.

[0015] 3. This invention solves the problem that existing underground engineering protective airtight doors use foamed rubber, which is prone to water leakage through its porous structure to the other side of the sealing device under high pressure, resulting in insufficient sealing performance and inability to withstand high water head pressure. This invention combines foamed rubber of different hardness with extruded rubber, thus ensuring both the gas sealing performance of the flood-proof protective airtight door under normal pressure and the liquid sealing performance under high water head. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view of the upper part of the door leaf;

[0018] Figure 2 This is a schematic diagram of the sealing device of the present invention.

[0019] Wherein: 1-door frame; 2-retaining ring; 3-door leaf; 4-pressure plate; 5-sealing device; 501-extruded rubber; 502-foamed rubber; 503-inner lip; 504-outer lip. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the composite structure flood-proof and protective airtight door sealing device of the present invention includes a door frame 1 and a door leaf 3 installed on the structural wall. A pressure plate 4 is provided on the door leaf 3, and a retaining ring 2 is provided on the door frame 1. A sealing device 5 is installed in the retaining ring 2.

[0022] The sealing device 5 comprises an outer layer and an inner layer. The outer layer is extruded rubber 501 with a hardness of 45-55, primarily used for high-pressure water sealing. The inner layer is foamed rubber 502 with a hardness of 30-40, used for gas sealing under normal pressure. The extruded rubber 501 has an inner lip 503 and an outer lip 504, both facing the direction of incoming water. The inner lip 503 and outer lip 504 are asymmetrical, with the outer lip 504 closer to the direction of incoming water and forming an angle smaller than that between the inner lip 503 and the direction of incoming water. The outer lip 504 is longer than the inner lip 503. The extruded rubber 501 and foamed rubber 502 are molded independently and then bonded together to form a single integral structure.

[0023] When the door leaf 3 is closed, it contacts the retaining ring 2, transferring the external resistance of the door leaf 3 to the door frame 1 and the structural wall. The pressure plate 4 compresses the foamed rubber 502 of the sealing device 5, causing compression deformation and sealing the gas at normal pressure. The pressure strip 4 is welded to the edge of the door leaf 3 40 mm away and is positioned opposite the foamed rubber 502 after the door leaf 3 is closed. After the door leaf 3 is closed, the raised pressure plate 4 first contacts and presses the foamed rubber 502 of the sealing device 5.

[0024] When the door 3 is closed, the inner lip 503 and outer lip 504 on the sealing device 5 are simultaneously compressed and deformed by the door 3. Both the inner lip 503 and outer lip 504 face the direction of incoming water. The external water pressure squeezes the gap between the inner lip 503, outer lip 504 and the door 3, sealing the high-pressure water.

[0025] This invention employs a composite structure of foamed rubber 502 and extruded rubber 501. The foamed rubber 502 is used for gas sealing under normal pressure, without affecting the gas-proof performance of the airtight door itself. The extruded rubber 501 is used for liquid sealing under high-pressure water head, serving as a high-pressure flood-proof measure. This invention combines foamed rubber 502 and extruded rubber 501 of different hardnesses, simultaneously ensuring the gas-sealing performance of the flood-proof airtight door under normal pressure and its liquid-sealing performance under high-pressure water head.

[0026] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Any modifications or substitutions that can be understood by those skilled in the art within the scope of the technology disclosed in the invention should be included within the scope of the invention.

Claims

1. A composite structure flood-proof and protective airtight door sealing device, comprising a door frame (1) and a door leaf (3) installed on a structural wall, characterized in that, The door frame (1) is provided with a retaining ring (2), the door leaf (3) is provided with a pressure plate (4), and a sealing device (5) is installed in the retaining ring (2). The sealing device (5) includes an extruded rubber (501) in the outer layer structure and a foamed rubber (502) in the inner layer structure. The extruded rubber (501) has an inner lip (503) and an outer lip (504) that are both facing the direction of incoming water. After the door leaf (3) is closed, the pressure plate (4) compresses the foamed rubber (502) to produce compression deformation and seals the normal pressure gas; the inner lip (503) and outer lip (504) are simultaneously compressed and deformed by the door leaf (3), and the external water pressure squeezes the gap between the inner lip (503), outer lip (504) and the door leaf (3) to seal the high pressure water.

2. The composite structure flood-proof and protective airtight door sealing device according to claim 1, characterized in that: The inner lip (503) and outer lip (504) are asymmetrical lip structures. The outer lip (504) is closer to the water flow direction and the angle between it and the water flow direction is smaller than the angle between the inner lip (503) and the water flow direction.

3. The composite structure flood-proof and protective airtight door sealing device according to claim 1, characterized in that: The length of the outer lip (504) is longer than the length of the inner lip (503).

4. The composite structure flood-proof and protective airtight door sealing device according to claim 1, characterized in that: The extruded rubber (501) and foamed rubber (502) are independently molded and then bonded together to form an integral structure.

5. The composite structure flood-proof and protective airtight door sealing device according to claim 1, characterized in that: The extruded rubber (501) has a hardness of 45-55, and the foamed rubber (502) has a hardness of 30-40.

6. The composite structure flood-proof and protective airtight door sealing device according to claim 1, characterized in that: After the door leaf (3) is closed, it contacts the retaining ring (2) to transfer the external resistance of the door leaf (3) to the door frame (1) and the structural wall.

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