Soundproof door

Abstract

The utility model relates to noise control technical field discloses a sound insulation door, the sound insulation door includes the door frame (1) of no threshold and the door leaf (3) of opposite opening through the hinge (2) installation to the door frame (1) on, the contact surface of door frame (1) with door leaf (3) and the contact surface of two door leaf (3) are all formed with the ladder structure for installing multiple sealing members, and the bottom of door leaf (3) is equipped with the sealable seal strip (6). The sound insulation door is smooth, and the sealing performance is good, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of noise control technology, specifically to a soundproof door. Background Technology

[0002] The presence of pores has a very serious impact on the overall sound insulation performance of soundproof doors. Usually, when installing soundproof doors, a door frame is installed around the door opening, and a sealing strip is added between the door leaf and the door frame to reduce the impact of pores and improve the overall sound insulation performance of the soundproof door.

[0003] However, in practical applications of soundproof doors, many laboratories or factory workshops require frequent entry and exit of goods, equipment, or forklifts. Door frames installed on the ground side can obstruct passage, and the bottom door frame can deform under prolonged pressure or impact, damaging its seal and affecting the overall sound insulation performance of the door. If no bottom door frame is installed, and a sealing strip is directly installed at the bottom of the door leaf, the strip will rub against the ground and become damaged after frequent opening and closing, similarly compromising the door frame's seal and affecting the overall sound insulation performance.

[0004] Therefore, there is an urgent need to provide a soundproof door that does not affect the passage of goods, has good sealing performance, and a long service life to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the problems of existing soundproof doors, such as obstructing passage, being easily damaged, and having poor overall sound insulation performance, and to provide a soundproof door that allows for smooth passage, has good sealing performance, and a long service life.

[0006] To achieve the above objectives, this utility model provides a soundproof door, which includes a door frame without a threshold and two door leaves installed on the door frame by hinges. The contact surfaces of the door frame and the door leaves, as well as the contact surfaces of the two door leaves, are all formed with stepped structures for installing multiple seals. The bottom of the door leaves is provided with a sinkable sealing strip.

[0007] Preferably, the door frame is installed to the wall using multiple expansion bolts.

[0008] Preferably, sound insulation cotton is filled between the door frame and the wall.

[0009] Preferably, sound-insulating adhesive is used to fill the space between the door frame and the wall.

[0010] Preferably, the hinge is an exposed hinge.

[0011] Preferably, the sealing element on the contact surface of the two door panels is a magnetic sealing strip.

[0012] Preferably, the door leaf is a steel soundproof door leaf, the outer layer of the steel soundproof door leaf is a 1.5-3mm steel plate, the middle layer is a damping adhesive layer and a rock wool layer or a polyurethane foam layer, and the inner layer is a fireproof board or gypsum board.

[0013] Preferably, the sinkable sealing strip is a mechanically automatic lifting sealing strip.

[0014] According to the above technical solution, a door frame is installed on both sides and the top of the doorway. The contact surface between the door frame and the door leaf is designed with a stepped structure for installing a sealing structure to ensure the soundproof door's airtightness and increase sound insulation. However, no door frame is installed at the bottom of the doorway, making the ground level and facilitating the smooth passage of forklifts and other equipment. Simultaneously, a sinkable sealing strip is installed at the bottom of the door leaf. When the soundproof door is closed, the sinkable sealing strip at the bottom of the door leaf is compressed and sinks, pressing against the ground to form a tight seal. Therefore, the application of this soundproof door ensures smooth passage, minimizes wear and tear, has a long service life, and significantly improves sound insulation. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a soundproof door according to one embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 Cross-sectional view at point 1-1;

[0017] Figure 3 yes Figure 1 Cross-sectional view at point 2-2.

[0018] Explanation of reference numerals in the attached figures

[0019] 1-Door frame 2-Hinge

[0020] 3-Door leaf 4-Expansion bolts

[0021] 5-Magnetic sealing strip; 6-Recessable sealing strip Detailed Implementation

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0023] In this utility model, unless otherwise stated, directional words such as "bottom," "inner," "middle," and "outer" contained in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the terminology.

[0024] See Figures 1 to 3This utility model provides a soundproof door, which includes a door frame 1 without a threshold and two door leaves 3 installed on the door frame 1 by hinges 2. The contact surfaces of the door frame 1 and the door leaves 3 as well as the contact surfaces of the two door leaves 3 are all formed with stepped structures for installing multiple seals. The bottom of the door leaves 3 is provided with a sinkable sealing strip 6.

[0025] Through the above technical solution, a door frame 1 is installed as a whole on both sides and the top surface of the doorway. The contact surface between the door frame 1 and the door leaf 3 is designed with a stepped structure for installing a sealing structure to ensure the airtightness of the soundproof door and increase sound insulation. The door frame 1 is not installed at the bottom of the doorway, making the ground level and facilitating the smooth passage of forklifts and other equipment. Simultaneously, a sinkable sealing strip 6 is installed at the bottom of the door leaf 3. When the door leaf 3 is closed, the sinkable sealing strip 6 at the bottom of the door leaf 3 is compressed and sinks, pressing against the ground to form a tight seal. Therefore, the application of this soundproof door ensures smooth passage, minimizes wear and tear, has a long service life, and significantly improves sound insulation.

[0026] When installing a soundproof door, the fixing method of the door frame 1 directly affects its stability, sound insulation effect, and safety. In this embodiment, to obtain a strong fixing force and prevent the door frame 1 from loosening, it is preferable to install the door frame 1 to the wall using multiple expansion bolts 4. Ordinary screws rely solely on friction for fixing, while expansion bolts 4 mechanically engage with the wall through an expansion mechanism (the metal sleeve opens), resulting in stronger pull-out resistance. Furthermore, the use of expansion bolts 4 can adapt to various wall structures, allowing the door frame 1 to be smoothly installed on concrete walls, solid brick walls, hollow brick walls, or steel structure walls. In addition, ordinary screws can form "sound bridges," causing vibration-transmitted sound, while expansion bolts, in conjunction with elastic washers, can reduce solid-borne sound transmission and improve sound insulation.

[0027] Even a gap of only 1-2 mm between the door frame and the wall can become a "short-circuit channel" for sound leakage, especially mid-to-high frequency human voices and mechanical vibrations. Therefore, to reduce airborne sound transmission and improve overall sound insulation, in one embodiment, sound-absorbing cotton is preferably filled between the door frame 1 and the wall. Filling with sound-absorbing cotton can effectively physically seal the gap. At the same time, the sound-absorbing cotton can also absorb vibration energy through its elastic porous structure, blocking the "sound bridge effect" and preventing sound from being transmitted through the door frame → wall → building structure. Furthermore, the sound-absorbing cotton can also adaptively fill gaps when the wall is uneven or the door frame is tilted, causing poor sealing, ensuring a seamless fit between the door frame and the wall.

[0028] Even tiny gaps (above 0.5mm) between the door frame and the wall can become channels for sound wave leakage, especially mid-to-high frequency sounds. Therefore, in order to completely fill these irregular gaps and block the airborne sound transmission path, in another embodiment, it is preferable to fill the space between the door frame 1 and the wall with sound-insulating adhesive. In this way, when the door is closed and vibrates, the rigid connection causes the vibration to be transmitted through the door frame-wall. The sound-insulating adhesive has a low modulus of elasticity, which can effectively absorb vibration energy, block the "sound bridge" effect, and reduce solid-borne sound transmission by about 15-30%. At the same time, buildings will undergo slight deformation due to changes in temperature and humidity. Traditional rigid filling materials (such as cement) are prone to cracking, while the sound-insulating adhesive has permanent elasticity, strong weather resistance, and can withstand ±25% displacement deformation.

[0029] When using this soundproof door, if the goods, equipment or forklifts passing through are large, in order to allow the double door panels 1 to open to a sufficient angle for the goods, equipment or forklifts to pass through smoothly, preferably, the hinges 2 are exposed hinges.

[0030] In this embodiment, the sealing element on the contact surface of the two door panels 3 is preferably a magnetic sealing strip 5. The magnetic sealing strip 5 has a built-in permanent magnet strip. When the door panel 3 is close to closing (distance ≤10mm), the magnetic force automatically attracts the other door, realizing active sealing without the intervention of zero external force, and solving the problem of sound leakage in the gap between the door panels.

[0031] In this embodiment, door leaf 3 is preferably a steel soundproof door leaf. The outer layer of the steel soundproof door leaf is a 1.5-3mm steel plate, the middle layer is a damping adhesive layer and a rock wool layer or a polyurethane foam layer, and the inner layer is a fireproof board or gypsum board. Using a steel soundproof door leaf can not only withstand various noise environments in the factory, but also achieve Class A fire resistance while being impact-resistant, meeting fire safety requirements and improving safety.

[0032] In this embodiment, the sinkable sealing strip 6 is preferably a mechanical automatic lifting sealing strip. The mechanical automatic lifting sealing strip achieves dynamic sealing of the door bottom gap through a purely mechanical structure. It can be a gravity-driven type suitable for inward-opening doors, where the weight of the door leaf presses down on the latch mechanism, causing the sealing strip to move downwards; or a hinge-linked type suitable for outward-opening doors, where the rotation of the door hinge triggers a linkage mechanism. Thus, when the door is closed, the mechanical device automatically releases the sealing strip, and the elastic body adheres to the ground with sufficient pressure. When the door is opened, the lifting arm retracts the sealing strip, increasing the ground clearance, preventing scratches, and extending service life.

[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A soundproof door, characterized in that, The soundproof door includes a door frame (1) without a threshold and two door leaves (3) installed on the door frame (1) by hinges (2). The contact surfaces of the door frame (1) and the door leaves (3) as well as the contact surfaces of the two door leaves (3) are all formed with stepped structures for installing multiple seals. The bottom of the door leaves (3) is provided with a sinkable sealing strip (6).

2. The soundproof door according to claim 1, characterized in that, The door frame (1) is installed on the wall by multiple expansion bolts (4).

3. The soundproof door according to claim 2, characterized in that, The door frame (1) and the wall are filled with sound insulation cotton.

4. The soundproof door according to claim 2, characterized in that, The door frame (1) and the wall are filled with sound-insulating adhesive.

5. The soundproof door according to claim 1, characterized in that, The hinge (2) is an exposed hinge.

6. The soundproof door according to claim 1, characterized in that, The sealing element on the contact surface of the two door panels (3) is a magnetic sealing strip (5).

7. The soundproof door according to claim 1, characterized in that, The door leaf (3) is a steel soundproof door leaf. The outer layer of the steel soundproof door leaf is a 1.5-3mm steel plate, the middle layer is a damping adhesive layer and a rock wool layer or a polyurethane foam layer, and the inner layer is a fireproof board or gypsum board.

8. The soundproof door according to claim 1, characterized in that, The sinkable sealing strip (6) is a mechanical automatic lifting sealing strip.

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