A sealing structure of a household pressure-bearing sealed cabin door

Abstract

The utility model discloses a kind of sealing structure of domestic pressure containment cabin door, including the sealing strip installation matrix formed by section bar welding, sealing strip installation matrix has U-shaped groove structure;High-hardness sealing strip as main pressure-bearing framework is arranged in U-shaped groove;The surface of high-hardness sealing strip towards cabin door closing direction is compounded with the elastically deformable three-element ethylene-propylene hollow soft sealing strip, three-element ethylene-propylene hollow soft sealing strip provides initial sealing before pressure establishment, high-hardness sealing strip bears the main pressure of door body after pressure establishment.The scheme is compounded by high-hardness sealing strip and soft sealing strip Sealing structure, soft sealing strip provides initial sealing before pressure establishment, so that effective sealing can be realized without too large operating force, reduce the requirement to installation base surface machining precision;After pressure establishment, the force of door body is mainly borne by high-hardness sealing strip, so that soft sealing strip avoids direct contact abrasion with metal matrix, prolongs the service life of sealing strip, improves use experience.

Description

Technical Field

[0001] This utility model relates to the field of household sealing equipment technology, specifically to a sealing structure for a household pressure-bearing sealing chamber door. Background Technology

[0002] As a key component of household sealing devices, the sealing performance of pressure-bearing sealed doors directly affects the device's usability and user experience. Currently, to balance visibility and pressure resistance requirements, these doors are generally made of thick, highly transparent engineering plastic sheets, resulting in a significant increase in door weight. This poses a serious challenge to the design of the sealing structure.

[0003] In existing technologies, sealing structures mainly face two challenges. Firstly, before pressure builds up inside the chamber, there is a lack of an effective pre-tightening mechanism. Users must apply force to bring the door and sealing strip into contact, a time-consuming and labor-intensive process that demands extremely high flatness from the mounting surface. Even slight unevenness can lead to air leakage, making it difficult to build pressure. Secondly, to reduce the requirements for machining precision and the force required to push the door, most products use low-hardness sealing strips. However, after pressure is established, the soft sealing strip can deform excessively and rub directly against the metal door frame, easily causing rapid wear and permanent damage, significantly shortening its service life.

[0004] Therefore, there is a need in this field to develop a sealing structure for household pressure-bearing door panels that can reduce the requirements for processing precision and operating force, while effectively protecting the sealing strip and extending its service life. Utility Model Content

[0005] In view of the above-mentioned technical problems in related technologies, this utility model proposes a sealing structure for a household pressure-bearing sealed door, which can overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A sealing structure for a household pressure-bearing sealed door; The sealing structure of this household pressure-bearing sealed hatch includes a sealing strip mounting base made of welded profiles, the sealing strip mounting base having a U-shaped groove structure; a high-hardness sealing strip serving as the main pressure-bearing skeleton is provided in the U-shaped groove; an elastically deformable EPDM hollow soft sealing strip is laminated on the surface of the high-hardness sealing strip facing the hatch closing direction, the EPDM hollow soft sealing strip provides an initial seal before pressure build-up, and the high-hardness sealing strip bears the main clamping force of the door body after pressure build-up.

[0007] Furthermore, the sealing strip mounting base includes a carbon steel square tube and two square steel bars, the two square steel bars are arranged in parallel and welded to the carbon steel square tube to form the U-shaped groove.

[0008] Furthermore, the high-hardness sealing strip has a Shore hardness of 65HA-70HA, and its top working surface is 10mm-20mm higher than the top of the side wall of the U-shaped groove.

[0009] Furthermore, the EPDM hollow soft sealing strip is fixed to the top working surface of the high-hardness sealing strip by an adhesive layer.

[0010] Furthermore, the high-hardness sealing strip and the U-shaped groove are either interference-fitted or detachably connected by fasteners.

[0011] Furthermore, under the working state after pressure is established, the EPDM hollow soft sealing strip is compressed and deformed and then attached to the side surface of the high-hardness sealing strip, maintaining a non-contact state with the metal surface of the sealing strip mounting base.

[0012] Furthermore, the mounting surface at the top of the high-hardness sealing strip is allowed to have a height error of ±5mm without affecting the final sealing effect.

[0013] Furthermore, the high-hardness sealing strip is a solid structure, and the cross-section of the EPDM hollow soft sealing strip contains at least one closed cavity.

[0014] Furthermore, the sealing strip mounting base constitutes the peripheral frame structure of the sealed chamber door frame, and the U-shaped groove is continuously arranged along the circumference of the door frame.

[0015] Furthermore, the high-hardness sealing strip and the EPDM hollow soft sealing strip together constitute a stepped dual-stage sealing system, which respectively undertake the different functions of structural support and elastic sealing.

[0016] The beneficial effects of this utility model are as follows: By adopting a unique double-seal strip composite structure, the soft sealing strip provides the initial seal, so that an effective seal can be achieved without excessive pre-tightening force before pressure is established, thereby reducing the difficulty of operation and the requirements for the machining accuracy of the installation base surface; after pressure is established, the force is borne by the high-hardness sealing strip, so that the soft sealing strip avoids direct contact with the metal substrate and wear, thereby significantly extending the overall service life of the sealing strip and improving the user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the sealing structure of a household pressure-bearing sealed compartment door according to an embodiment of the present utility model; Figure 2 This is a sealing structure for a household pressure-bearing sealed compartment door according to an embodiment of the present invention. Figure 1 Sectional view of line AA in the middle; In the picture: 1. Carbon steel square tube; 2. Square steel; 3. EPDM hollow soft sealing strip; 4. High hardness sealing strip; 5. High transparency engineering plastic door panel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0020] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0021] like Figure 1-2 As shown in the embodiment of this utility model, a sealing structure for a household pressure-bearing sealed door includes a sealing strip mounting base made of welded profiles, the sealing strip mounting base having a U-shaped groove structure; a high-hardness sealing strip 4 serving as the main pressure-bearing skeleton is provided in the U-shaped groove; an elastically deformable EPDM hollow soft sealing strip 3 is laminated on the surface of the high-hardness sealing strip 4 facing the door closing direction, the EPDM hollow soft sealing strip 3 provides an initial seal before pressure is established, and the high-hardness sealing strip 4 bears the main clamping force of the door body after pressure is established.

[0022] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the sealing strip mounting base includes a carbon steel square tube 1 and two square steels 2. The two square steels 2 are arranged in parallel and welded to the carbon steel square tube 1 to form the U-shaped groove.

[0023] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the high-hardness sealing strip 4 has a Shore hardness of 65HA-70HA, and its top working surface is 10mm-20mm higher than the top of the side wall of the U-shaped groove.

[0024] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the EPDM hollow soft sealing strip 3 is fixed to the top working surface of the high-hardness sealing strip 4 by an adhesive layer.

[0025] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the high-hardness sealing strip 4 and the U-shaped groove are either interference-fitted or detachably connected by fasteners.

[0026] According to the sealing structure of a household pressure-bearing sealed door described in an embodiment of the present invention, in a specific embodiment, under the working state after pressure is established, the EPDM hollow soft sealing strip 3 is compressed and deformed and then attached to the side surface of the high-hardness sealing strip 4, maintaining a non-contact state with the metal surface of the sealing strip mounting base.

[0027] According to the sealing structure of a household pressure-bearing sealed door described in an embodiment of the present invention, in a specific embodiment, the mounting plane of the top of the high-hardness sealing strip 4 is allowed to have a height error of ±5mm without affecting the final sealing effect.

[0028] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the high-hardness sealing strip 4 is a solid structure, and the cross-section of the EPDM hollow soft sealing strip 3 includes at least one closed cavity.

[0029] According to an embodiment of the present invention, a sealing structure for a household pressure-bearing sealed door is provided. In a specific embodiment, the sealing strip mounting base constitutes the peripheral frame structure of the sealed door frame, and the U-shaped groove is continuously arranged along the circumference of the door frame.

[0030] According to the sealing structure of a household pressure-bearing sealed door described in an embodiment of the present invention, in a specific embodiment, the high-hardness sealing strip 4 and the EPDM hollow soft sealing strip 3 together constitute a stepped double-stage sealing system, which respectively undertake the different functions of structural support and elastic sealing.

[0031] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific embodiments and other aspects.

[0032] In practical use, the sealing structure of a household pressure-bearing sealed door according to this utility model includes a carbon steel square tube 1, a square steel 2, a high-hardness sealing strip 4 with high hardness (Shore hardness 65HA-70HA), and a EPDM hollow soft sealing strip 3.

[0033] Carbon steel square tube 1 is welded to two square steel bars 2 to form a U-shaped groove. A high-hardness sealing strip 4 (Shore hardness 65HA-70HA) is installed inside the U-shaped groove. The high-hardness sealing strip (Shore hardness 65HA-70HA) is 10mm-20mm higher than the upper surface of the square steel bars. A EPDM hollow soft sealing strip is adhered to the surface of the high-hardness sealing strip. The EPDM hollow soft sealing strip serves as the initial seal for the door. After pressure is established, the force of the door pressing down mainly acts on the high-hardness sealing strip (Shore hardness 65HA-70HA), avoiding direct contact between the soft sealing strip and the steel. This reduces the force required to push the door before pressure is established, protects the soft sealing strip, achieves the desired function, and is economical in processing costs.

[0034] During use, the operator closes the household pressure-bearing sealed door. Before the pressure inside the chamber is established, the door acts on the EPDM hollow soft sealing strip 3. Because the soft sealing strip 3 has a hollow structure and is soft in texture, it can be elastically deformed by the user with only a small pushing force, thereby achieving an initial seal around the door, effectively preventing gas leakage and creating conditions for the establishment of pressure inside the chamber.

[0035] As the cabin pressure builds up and gradually increases, the pressure acting on the inside of the door pushes the door further towards the sealing structure. At this time, the clamping force of the door is mainly transmitted to the high-hardness sealing strip 4, which serves as the main pressure-bearing skeleton. The EPDM hollow soft sealing strip 3 is fully compressed under continuous pressure, and its deformed portion mainly adheres to the side surface of the high-hardness sealing strip 4, thereby avoiding direct contact and friction with the metal substrate composed of carbon steel square tube 1 and square steel 2.

[0036] In this embodiment, the Shore hardness of the high-hardness sealing strip 4 is preferably 65HA-70HA, and its top working surface is 10mm-20mm higher than the upper surface of the square steel 2. The EPDM hollow soft sealing strip 3 is firmly fixed to the top working surface of the high-hardness sealing strip 4 with adhesive. This structural design allows the high-hardness sealing strip 4 to withstand the main pressure while protecting the soft sealing strip 3 from mechanical damage. Even if there is a certain flatness error in the mounting plane of the high-hardness sealing strip 4, reliable sealing can be achieved through the initial deformation of the soft sealing strip 3 and subsequent pressure, significantly reducing the requirements for the machining accuracy of the U-groove.

[0037] In summary, by employing the above-mentioned technical solution of this utility model and using a unique double-seal strip composite structure, the soft sealing strip provides the initial seal, thus achieving effective sealing without excessive pre-tightening force before pressure build-up. This reduces the difficulty of operation and the requirements for the machining accuracy of the installation base surface. After pressure build-up, the force is borne by the high-hardness sealing strip, thereby preventing the soft sealing strip from directly contacting the metal substrate and causing wear. This significantly extends the overall service life of the sealing strip and improves the user experience.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for a household pressure-bearing sealed compartment door, characterized in that, The system includes a sealing strip mounting base made of welded profiles, the sealing strip mounting base having a U-shaped groove structure; a high-hardness sealing strip (4) serving as the main pressure-bearing skeleton is provided in the U-shaped groove; a flexible EPDM hollow soft sealing strip (3) is compositely applied to the surface of the high-hardness sealing strip (4) facing the door closing direction, the EPDM hollow soft sealing strip (3) provides an initial seal before pressure is established, and the high-hardness sealing strip (4) bears the main clamping force of the door after pressure is established.

2. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The sealing strip mounting base includes a carbon steel square tube (1) and two square steel bars (2). The two square steel bars (2) are arranged in parallel and welded to the carbon steel square tube (1) to form the U-shaped groove.

3. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The high-hardness sealing strip (4) has a Shore hardness of 65HA-70HA, and its top working surface is 10mm-20mm higher than the top of the side wall of the U-shaped groove.

4. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The EPDM hollow soft sealing strip (3) is fixed to the top working surface of the high hardness sealing strip (4) by an adhesive layer.

5. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The high-hardness sealing strip (4) and the U-shaped groove are either interference fit or detachably connected by fasteners.

6. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, Under the working state after pressure is established, the EPDM hollow soft sealing strip (3) is compressed and deformed and then attached to the side surface of the high hardness sealing strip (4), maintaining a non-contact state with the metal surface of the sealing strip mounting base.

7. The sealing structure of a household pressure-bearing sealed compartment door according to claim 3, characterized in that, The mounting plane at the top of the high-hardness sealing strip (4) is allowed to have a height error of ±5mm without affecting the final sealing effect.

8. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The high-hardness sealing strip (4) is a solid structure, and the cross-section of the EPDM hollow soft sealing strip (3) contains at least one closed cavity.

9. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The sealing strip mounting base constitutes the peripheral frame structure of the sealed chamber door frame, and the U-shaped groove is continuously arranged along the circumference of the door frame.

10. The sealing structure of a household pressure-bearing sealed compartment door according to claim 1, characterized in that, The high-hardness sealing strip (4) and the EPDM hollow soft sealing strip (3) together constitute a stepped double-stage sealing system, which respectively undertake the different functions of structural support and elastic sealing.

Images