Sound insulation steel door structure

Abstract

The utility model relates to a sound insulation steel door structure which comprises a door frame, a door leaf and a hinge, the door frame comprises an outer side door frame and an inner side door frame, and the outer side door frame and the inner side door frame are connected into a whole through a sound insulation plate; the rear side of the sound insulation plate is sealed through a cover plate, the front side of the sound insulation plate extends forwards to fix a rectangular sealing strip, and the rectangular sealing strip is flush with the front side of the outer side door frame or slightly protrudes out of the outer side door frame forwards. The door leaf is provided with a first step part, and when the door leaf is closed, the first step part is attached to the rectangular sealing strip. The door frame is designed to be of a structure with the inner door frame and the outer door frame, the inner door frame and the outer door frame are directly connected through the sound insulation plate to form an integrated structure, the sound insulation effect of the door frame is improved, and the sound insulation requirement not lower than 45 dB can be met.

Description

Technical Field

[0001] This utility model relates to a steel soundproof door, specifically a soundproof steel door structure with high sound insulation capability, belonging to the field of soundproof door technology. Background Technology

[0002] As people have higher and higher requirements for the built environment, doors, as an important building component, also have higher requirements for their sound insulation performance.

[0003] Currently, ordinary swing doors can achieve a sound insulation level of around 30dB, which is generally sufficient for most noise reduction needs. However, for venues such as theaters, high-end hotels, studios, and conference halls, ordinary swing doors cannot meet the high-decibel (no less than 45dB) sound insulation requirements. Existing technologies typically improve the sound insulation of such doors by adding sealing strips or increasing the door's thickness. However, these methods can lead to increased door volume and weight, or deterioration in sound insulation as the sealing strips age. Summary of the Invention

[0004] The purpose of this invention is to provide a solution for a steel door with high sound insulation capabilities, thereby solving the aforementioned technical problems.

[0005] The present invention adopts the following technical solution:

[0006] A soundproof steel door structure includes a door frame 1, a door leaf 2, and a hinge 3. The door frame 1 includes an outer door frame 104 and an inner door frame 105, which are connected by a soundproof panel 101. The rear side of the soundproof panel 101 is closed by a cover plate, and a rectangular sealing strip 103 extends forward and is fixed to the front side. The rectangular sealing strip 103 is flush with or slightly protrudes forward from the front side of the outer door frame 104. The door leaf 2 has a first step portion, which fits against the rectangular sealing strip 103 when the door leaf is closed.

[0007] Preferably, the door leaf 2 has a double-layer structure, with the boundary between the two layers located at the first step, and the two layers are filled with sound insulation materials of different densities.

[0008] Furthermore, the inner door frame 105 is also provided with a second step portion, the second step portion having a groove, the groove containing an irregularly shaped sealing strip 102, the irregularly shaped sealing strip including a main body and a protrusion, the main body being located in the groove, and the protrusion extending outward from the groove.

[0009] Furthermore, the double-layer structure of the door leaf 2 includes a first layer structure 201 close to the hinge 3 and a second layer structure 202 away from the hinge 3, with the second step portion located on the second layer structure 202.

[0010] Preferably, it also includes a lock 4 that passes through the door leaf 2.

[0011] Preferably, the outer door frame 104 and the inner door frame 105 are each composed of 1.5mm thick galvanized steel bent parts, and a 10mm thick sound insulation board 101 is fixedly installed between the two galvanized steel bent parts.

[0012] Preferably, the rectangular sealing strip 103 is affixed to the right-angled bending plane of the door frame 1.

[0013] Preferably, the inner and outer panels of the door leaf 2 are made of 1.0mm galvanized steel sheet and 2.0mm galvanized steel sheet, respectively, and the inner frame of the door leaf is a 3mm galvanized steel sheet assembly.

[0014] Preferably, a door closer is installed on door leaf 2 to achieve automatic closing of the door leaf.

[0015] Preferably, the lock 4 has a locking function.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1) The door frame is designed with an inner and outer frame structure, which are directly connected by a sound insulation board to form an integrated structure, improving the sound insulation effect of the door frame and meeting the sound insulation requirement of not less than 45dB.

[0018] 2) A rectangular sealing strip is fixedly installed in the direction of the sound insulation panel extending forward, forming an integrated structure with the sound insulation panel to jointly undertake the sound insulation function and improve the sound insulation effect of the first step.

[0019] 3) A second step is designed on the inner door frame, and a groove is set to embed the irregular sealing strip into the groove, which further improves the sound insulation effect.

[0020] 4) By cleverly utilizing the sound insulation panels on the door frame, the thickness of the door leaf is not directly increased, and the number of sealing strips used is also small, reducing the risk of poor sound insulation due to the aging of the sealing strips. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external shape of the soundproof steel door structure of this utility model.

[0022] Figure 2 This is a longitudinal sectional view of the soundproof steel door structure of this utility model.

[0023] Figure 3This is a cross-sectional view of the door frame of the soundproof steel door structure of this utility model.

[0024] Figure 4 This is a cross-sectional view of the soundproof steel door structure of this utility model, wherein... Figure 3 This is an enlarged view of the left side of the image.

[0025] In the diagram, 1. door frame, 2. door leaf, 3. hinge, 4. lock, 101. sound insulation board, 102. irregular-shaped sealing strip, 103. rectangular sealing strip, 104. outer door frame, 105. inner door frame. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] See Figure 1-4 This utility model is composed of components such as a door frame 1, a door leaf 2, a hinge 3, and a lock 4. Specifically, a soundproof steel door structure includes a door frame 1, a door leaf 2, and a hinge 3. The door frame 1 includes an outer door frame 104 and an inner door frame 105, which are connected as one unit by a soundproof plate 101. The rear side of the soundproof plate 101 is closed by a cover plate, and a rectangular sealing strip 103 extends forward and is fixed to the front side. The rectangular sealing strip 103 is flush with or slightly protrudes forward from the front side of the outer door frame 104. The door leaf 2 has a first step portion, which fits against the rectangular sealing strip 103 when the door leaf is closed.

[0028] In this embodiment, see Figure 2 and 4 The door leaf 2 has a double-layer structure, with the boundary between the two layers located at the first step. The two layers are filled with sound insulation materials of different densities. Different forms of cross-sectional lines are used in the figure to represent different sound insulation materials.

[0029] In this embodiment, see Figure 3 and Figure 4 The inner door frame 105 is also provided with a second step, which has a groove. The groove is used to accommodate an irregularly shaped sealing strip 102. The irregularly shaped sealing strip includes a main body and a protrusion. The main body is located in the groove, and the protrusion extends outward from the groove.

[0030] In this embodiment, see Figure 4 The double-layer structure of the door leaf 2 includes a first layer structure 201 close to the hinge 3 and a second layer structure 202 away from the hinge 3, and the second step portion is located on the second layer structure 202.

[0031] In this embodiment, see Figure 1 and4 It also includes a lock 4 that passes through the door leaf 2.

[0032] In this embodiment, see Figure 3 The outer door frame 104 and the inner door frame 105 are each composed of 1.5mm thick galvanized steel bent parts, and a 10mm thick sound insulation board 101 is fixedly installed between the two galvanized steel bent parts.

[0033] In this embodiment, see Figure 3 The rectangular sealing strip 103 is pasted on the right-angle bent plane of the door frame 104.

[0034] In this embodiment, see Figure 4 The inner and outer panels of door leaf 2 are made of 1.0mm galvanized steel sheet and 2.0mm galvanized steel sheet, respectively, and the inner frame of the door leaf is made of 3mm galvanized steel sheet assembly.

[0035] This utility model's soundproof steel door structure achieves an air-weighted sound insulation level of ≥45dB, meeting high-performance sound insulation requirements. The door frame is assembled from galvanized steel sheet bending components. The door leaf surface and interior utilize steel plates of varying thicknesses, with multiple sound-insulating materials filling the interior, achieving a combined effect of sound insulation, sound absorption, and sound reflection, thus blocking different audio frequencies. Multiple tongue-and-groove joints and sealing strips are installed at the overlap between the door leaf and the frame, forming a multi-layered overlap that effectively improves the sealing between the frame and leaf. A dedicated soundproof lock with a locking function is included. The hinges are flush-mounted, reducing localized impact on the door frame and door leaf. Door closers, doorstops, and other hardware accessories are included according to usage needs.

[0036] The door frame of this utility model ( Figure 3 It is composed of two 1.5mm thick galvanized steel (or stainless steel) bent parts, with a 10mm thick sound insulation board 5 placed between the two bent parts, so that the door frame can block the transmission of sound. Two sealing strips are installed at the door frame: an irregularly shaped sealing strip 6 (embedded in the installation groove) and a rectangular cross-section sealing strip 7 pasted on the right-angle bent plane.

[0037] The inner and outer panels of door leaf 2 are made of 1.0mm galvanized steel sheet and 2.0mm galvanized steel sheet, respectively, and are equipped with sound insulation materials of different densities inside; the inner frame of the door leaf is a 3mm galvanized steel sheet assembly.

[0038] Door leaf 2 is connected to door frame 1 via hinge 3. A door closer can be installed on the door leaf as needed to achieve automatic closing of the door leaf. The door closer is prior art, therefore it is not shown in the attached drawings.

[0039] Lock 4 features a locking function, and the door leaf has stepped edges that allow it to tightly press against the corresponding seals on the door frame, ensuring a tight seal and achieving high sound insulation requirements. The locking function is existing technology and is therefore not shown in the attached diagram.

[0040] This utility model features a door frame design with inner and outer door frames directly connected by a sound insulation panel to form an integrated structure, improving the sound insulation effect of the door frame and meeting a sound insulation requirement of no less than 45dB. A rectangular sealing strip is fixedly installed in the forward direction of the sound insulation panel, forming an integrated structure with the sound insulation panel and jointly undertaking the sound insulation function, thus improving the sound insulation effect of the first step. A second step is designed on the inner door frame, with a groove to embed the irregularly shaped sealing strip into the groove, further improving the sound insulation effect. By cleverly utilizing the sound insulation panel on the door frame, the thickness of the door leaf is not directly increased, and the number of sealing strips used is also small, reducing the risk of deterioration in sound insulation effect due to aging of the sealing strip.

[0041] The above are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements based on this, and these changes or improvements are all within the scope of protection claimed by the present utility model without departing from the overall concept of the present utility model.

Claims

1. A soundproof steel door structure, comprising a door frame (1), a door leaf (2), and hinges (3), characterized in that: The door frame (1) includes an outer door frame (104) and an inner door frame (105), and the outer door frame (104) and the inner door frame (105) are connected together by a sound insulation board (101); The sound insulation panel (101) is closed at the rear by a cover plate, and a rectangular sealing strip (103) extends forward and is fixed at the front. The rectangular sealing strip (103) is flush with the front of the outer door frame (104) or slightly protrudes forward from the outer door frame (104). The door leaf (2) has a first step portion, which is in contact with the rectangular sealing strip (103) when the door leaf is closed.

2. The soundproof steel door structure as described in claim 1, characterized in that: The door leaf (2) has a double-layer structure, with the boundary between the two layers located at the first step, and the two layers are filled with sound insulation materials of different densities.

3. The soundproof steel door structure as described in claim 2, characterized in that: The inner door frame (105) is also provided with a second step, which has a groove. The groove is fitted with a shaped sealing strip (102). The shaped sealing strip includes a main body and a protrusion. The main body is located in the groove, and the protrusion extends outward from the groove.

4. The soundproof steel door structure as described in claim 3, characterized in that: The double-layer structure of the door leaf (2) includes a first layer structure (201) close to the hinge (3) and a second layer structure (202) away from the hinge (3), with the second step located on the second layer structure (202).

5. The soundproof steel door structure as described in claim 1, characterized in that: It also includes a lock (4) that passes through the door leaf (2).

6. The soundproof steel door structure as described in claim 1, characterized in that: The outer door frame (104) and the inner door frame (105) are each composed of 1.5mm thick galvanized steel bent parts, and a 10mm thick sound insulation board (101) is fixedly installed between the two galvanized steel bent parts.

7. The soundproof steel door structure as described in claim 1, characterized in that: The rectangular sealing strip (103) is pasted on the right-angle bent plane of the door frame (1).

8. The soundproof steel door structure as described in claim 1, characterized in that: The inner and outer panels of the door leaf (2) are 1.0mm galvanized steel plate and 2.0mm galvanized steel plate, respectively, and the inner frame of the door leaf is a 3mm galvanized steel plate assembly.

9. The soundproof steel door structure as described in claim 1, characterized in that: A door closer is installed on the door leaf (2) to achieve automatic closing of the door leaf.

10. The soundproof steel door structure as described in claim 1, characterized in that: The lock (4) has a locking function.

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