Door leaf and door frame sealing structure

Abstract

The utility model discloses a door leaf and door frame sealing structure, which relates to a door, is used for sealing between a door leaf and a door frame, and is characterized by comprising a sealing strip arranged on the periphery of the inner side of the door leaf and a knife-shaped pressing strip which is arranged on the periphery of the outer side of the door frame and can be matched with the sealing strip to seal the door frame and the door leaf, the knife-shaped pressing strip is formed by folding a plate; when the door leaf is closed on the door frame, the knife-shaped pressing strip is pressed on the sealing strip to form sealing. The knife-shaped pressing strip is formed by folding one plate, and compared with a single-piece knife-shaped pressing strip in the prior art, the pressing strip is obviously higher in strength and not prone to deformation.

Description

Technical Field

[0001] The utility model relates to a door, in particular to a sealing structure of a door leaf and a door frame. Background Art

[0002] Doors directly connecting to the outdoors in transformer rooms and substations are typically fire-rated. Some transformer rooms and substations also require flood prevention measures, such as those in underground structures, which can be easily flooded due to urban flooding. Therefore, doors directly connecting to the outdoors in some transformer rooms and substations require both fire and flood protection. Furthermore, existing fire doors typically utilize a single-plane seal, which leaves much to be desired in terms of smoke and fire protection.

[0003] A prior application, application number 202421020843.3, disclosed a fire and flood-resistant door in which a seal is formed by pressing a knife-shaped bead against a sealing strip. However, during the subsequent design process, it was discovered that the knife-shaped bead formed by this solution was relatively weak and easily deformed when the door leaf was closed onto the door frame. Furthermore, the door frame in this application is assembled from two parts, the front frame and the rear frame. During production, welding between the two parts is required, which is a complex process and the welds affect the appearance.

[0004] Therefore, in order to solve the aforementioned problems, this application is proposed. Utility Model Content

[0005] The purpose of the present invention is to provide a sealing structure for a door leaf and a door frame, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A door leaf and door frame sealing structure, used for sealing between the door leaf and the door frame, characterized in that it includes a sealing strip arranged on the inner periphery of the door leaf and a knife-shaped strip arranged on the outer periphery of the door frame and capable of cooperating with the sealing strip to achieve sealing between the door frame and the door leaf, wherein the knife-shaped strip is formed by folding a plate in half; when the door leaf is closed on the door frame, the knife-shaped strip presses on the sealing strip to form a seal.

[0008] Preferably, the door frame and the knife-shaped strip are formed by bending the same plate multiple times.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The knife-shaped bead in the present invention is formed by folding a plate in half. Compared with the single-piece knife-shaped bead in the prior art, the bead in the present application is obviously stronger and less prone to deformation.

[0011] The door frame and the knife-shaped molding of the utility model are an integrated structure with good integrity. There is no need for welding during molding, which can reduce production costs such as labor; there are no welding spots or welds on the door frame, which makes the overall structure more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of embodiment 1 of a door leaf and door frame sealing structure.

[0013] Figure 2 This is a structural schematic diagram of embodiment 2 of a door leaf and door frame sealing structure.

[0014] Figure 3 This is a structural schematic diagram of embodiment 3 of a door leaf and door frame sealing structure.

[0015] Figure 4 This is another structural schematic diagram of embodiment 3 of a door leaf and door frame sealing structure.

[0016] Figure 5 This is a structural schematic diagram of embodiment 4 of a door leaf and door frame sealing structure.

[0017] Figure 6 This is another structural schematic diagram of embodiment 4 of a door leaf and door frame sealing structure. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1

[0020] See also Figure 1 and Figure 2 In an embodiment of the utility model, a door leaf and door frame sealing structure is provided, which is used for sealing between a door leaf 1 and a door frame 2, and includes a sealing strip 3 arranged on the inner periphery of the door leaf 1 and a knife-shaped strip 21 arranged on the outer periphery of the door frame 2 and capable of cooperating with the sealing strip 3 to achieve sealing between the door frame 2 and the door leaf 1. The knife-shaped strip 21 is formed by folding a plate in half; when the door leaf 1 is closed on the door frame 2, the knife-shaped strip 21 presses on the sealing strip 3 to form a seal.

[0021] The knife-shaped bead in the present invention is formed by folding a plate in half. Compared with the single-piece knife-shaped bead in the prior art, the bead in the present application is obviously stronger and less prone to deformation.

[0022] The knife-shaped bead 21 is formed by folding a plate in half, and its cross section is dovetail-shaped, thereby improving the structural strength of the knife-shaped bead.

[0023] The folding angle of the plate forming the knife-shaped bead 21 is 0-60 degrees.

[0024] The plate forming the knife-shaped beading 21 forms a sharp corner at the bend, and the sharp corner presses on the sealing strip 3 to form a seal between the door leaf 1 and the door frame 2, and the sealing effect is better.

[0025] The pointed outer wall is in an arc shape, and the arc-shaped outer wall is an arc surface automatically formed when the plate is bent.

[0026] It should be noted that in the process of closing the door leaf 1, the sealing strip 3 near the hinge between the door leaf 1 and the door frame 2 will first contact the knife-shaped molding 21. As the door leaf 1 closes, the arc-shaped sharp corners of the outer wall can slide against the sealing strip 3. Compared with the moldings in the prior art, the cutting end of the knife-shaped molding 21 in this solution is arc-shaped, and there will be no problem of large sliding resistance and difficulty in closing the door due to the pressing edges of the single-piece molding pressing against the sealing strip 3, and the sealing strip 3 is not easily damaged.

[0027] The thickness of the front end of the knife-shaped bead 21 is no more than 4 mm, which ensures the sealing effect when the bead is cut and pressed.

[0028] The door frame 2 and the knife-shaped molding 21 are formed by bending the same plate multiple times.

[0029] The door frame 2 further includes a first folding edge 22 and a second folding edge 23, which are arranged opposite to each other. At this time, the door frame 2 and the knife-shaped bead 21 have an overall cross-section of shape.

[0030] When installing the door frame 2, multiple connecting blocks are fixed vertically between the outer sides of the first folded edge 22 and the second folded edge 23 to increase the overall strength of the door frame 2. When installing the door frame 2, the connecting blocks are fixed to the side walls of the door opening by expansion bolts.

[0031] It should be noted that the first folded edge 22, the second folded edge 23 and the knife-shaped molding 21 are integrally formed and are formed by bending the same plate multiple times. When pouring concrete between the door frame and the door opening during installation of the door frame, the concrete can be poured directly into the door frame 2, and the concrete will directly enter between the door frame 2 and the wall of the door opening from the opening formed by the first folded edge 22 and the second folded edge 23 of the door frame 2; compared with the prior art, pouring concrete is more convenient, and the concrete in the door frame and the concrete between the door frame 2 and the side wall of the door opening are integrally formed, so that the integrity of the concrete is higher, the concrete after forming is stronger and firmer, and the sealing effect between the side wall of the door opening and the door frame is better.

[0032] Example 2

[0033] See also Figure 3 The knife-shaped beading 21 is formed by folding a plate in half and pressing the edge. At this time, the plates on both sides of the knife-shaped beading 21 are attached together, and the overall cross-section of the door frame 2 and the knife-shaped beading 21 is shape.

[0034] Example 3

[0035] See also Figure 4 The door frame 2 also includes a first overlapping surface 24, and the inner side of the door leaf 1 is provided with a second overlapping surface 11 that can cooperate with the first overlapping surface 24 to achieve parallel overlapping. When the door leaf 1 is completely closed to the door frame 2, the first overlapping surface 24 and the second overlapping surface 11 are parallel to each other; the width of the overlapping part is not less than 12mm, and the overlapping gap is not more than 3mm. At this time, the overall cross-section of the door frame 2 and the knife-shaped beading 21 is shape or shape.

[0036] The surface of the first lap joint 24 and / or the second lap joint 11 is provided with a fireproof sealing strip, which can improve the fireproof airtightness. The aforementioned sealing strip 3 arranged in the door leaf 1 is also a fireproof sealing strip. The fireproof sealing strip expands when encountering fire and fills the gap between the door frame 2 and the door leaf 1, which can effectively prevent the spread of fire and protect public life and property safety.

[0037] It should be noted that, as an important fire-fighting facility in a building, the overlap size of the fire door's door leaf and door frame should not be less than 12mm, and the overlap gap should not be greater than 3mm. When the door leaf 1 is subjected to a large external force toward the door frame 2, the first overlap surface 24 of the door frame 2 and the second overlap surface 11 of the door leaf 1 overlap and cooperate with each other, and the door leaf 1 is supported and sealed by the door frame 2. The design of the overlap size of the fire door's door leaf and door frame being not less than 12mm can ensure the reliability of the support of the door frame 2 when the door leaf 1 is closed on the door frame 2 and is subjected to a large external force toward the door frame 2; and the overlap gap is not greater than 3mm. A fireproof sealing strip can be set on the surface of the first overlap surface 24 and / or the second overlap surface 11, and at the same time, a certain movable space can be given to the door leaf 1 to form a safe fit between the door leaf 1 and the door frame 2, preventing the door leaf 1 from being directly damaged when subjected to a large external force.

[0038] The edge of the door leaf 1 and the matching portion of the door frame 2 are stepped to achieve overlapping with the door frame 2.

[0039] Example 4

[0040] See also Figure 5 The door frame 2 further includes a first right-angle connecting surface 25 and a second right-angle connecting surface 26 integrally formed with the knife-shaped beading 21, and the knife-shaped beading 21 is located between the first right-angle connecting surface 25 and the second right-angle connecting surface 26;

[0041] The first right-angle connecting surface 25 is located between the knife-shaped molding 21 and the first folded edge 22, and the second right-angle connecting surface 26 is located between the first overlapping surface 24 and the second folded edge 23; when the door leaf 1 is completely closed to the door frame 2, the outer wall of one side of the first right-angle connecting surface 25 is flush with the outer wall of the door leaf 1, and the outer wall of the other side of the first right-angle connecting surface 25 is parallel to the side of the door leaf 1 facing the side wall of the door opening.

[0042] In summary, the plate used to form the door frame 2 and the knife-shaped bead 21 is bent multiple times to form a first folding edge 22, a first right-angle connecting surface 25, a knife-shaped bead 21, a first overlapping surface 24, a second right-angle connecting surface 26 and a second folding edge 23 in sequence. The overall cross-section of the door frame 2 and the knife-shaped bead 21 is shape or shape.

[0043] It should be noted that one right-angled side of the first right-angled connecting surface 25 is flush with the outer side of the door leaf 1, and the other right-angled side is loosely matched with the outer walls of the door leaf 1, so that the door leaf 1 is not easily pried open or damaged.

[0044] When the door leaf 1 of the present invention is closed onto the door frame 2, in addition to the seal formed by the knife-shaped molding 21 pressing on the sealing strip 3, there is also a second seal formed by the first overlapping surface 24 and the door leaf 1, so that double sealing can be achieved between the door and the frame. The gap between the two is tortuous, which can effectively prevent smoke from passing through. It has good sealing performance and beautiful appearance, thereby improving the fire resistance of the fire door.

[0045] Example 5

[0046] See also Figure 6 The door frame 2 may be provided with oblique braces to further improve the overall strength of the door frame 2 , and a plurality of oblique braces are distributed vertically in the door frame 2 .

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

Claims

1. A door leaf and door frame sealing structure, used for sealing between a door leaf (1) and a door frame (2), characterized in that: The invention comprises a sealing strip (3) arranged on the inner periphery of the door leaf (1) and a knife-shaped strip (21) arranged on the outer periphery of the door frame (2) and capable of cooperating with the sealing strip (3) to achieve sealing between the door frame (2) and the door leaf (1); the knife-shaped strip (21) is formed by folding a plate in half; when the door leaf (1) is closed on the door frame (2), the knife-shaped strip (21) presses on the sealing strip (3) to form a seal.

2. A door leaf and door frame sealing structure according to claim 1, characterized in that: The knife-shaped layering strip (21) is formed by folding a plate in half, and its cross section is in a dovetail shape.

3. A door leaf and door frame sealing structure according to claim 2, characterized in that: The folding angle of the plate forming the knife-shaped layering strip (21) is 0-60 degrees.

4. A door leaf and door frame sealing structure according to claim 1, characterized in that: The knife-shaped pressure strip (21) is formed by folding a plate in half and pressing the edges.

5. A door leaf and door frame sealing structure according to any one of claims 1 to 4, characterized in that: The plate forming the knife-shaped pressure strip (21) forms a sharp corner at the bend, and the sharp corner presses on the sealing strip (3) to form a seal between the door leaf (1) and the door frame (2).

6. A door leaf and door frame sealing structure according to claim 5, characterized in that: The pointed outer wall is in an arc shape.

7. The door leaf and door frame sealing structure according to claim 1, characterized in that: The door frame (2) and the knife-shaped pressure strip (21) are formed by bending the same plate multiple times.

8. The door leaf and door frame sealing structure according to claim 7, characterized in that: The door frame (2) and the knife-shaped pressure strip (21) form an integral cross-section shape or shape or shape or shape or shape or shape.

9. The door leaf and door frame sealing structure according to claim 1, characterized in that: The door frame (2) further comprises a first overlapping surface (24), and the inner side of the door leaf (1) is provided with a second overlapping surface (11) which can cooperate with the first overlapping surface (24) to achieve parallel overlapping with each other. When the door leaf (1) is completely closed onto the door frame (2), the first overlapping surface (24) and the second overlapping surface (11) are parallel overlapping with each other.

10. A door leaf and door frame sealing structure according to claim 9, characterized in that: The width of the overlapping portion of the first overlapping surface (24) and the second overlapping surface (11) is not less than 12 mm, and the overlapping gap between the first overlapping surface (24) and the second overlapping surface (11) is not greater than 3 mm.

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