CN111332413A - Fireproof return air silencer for ship cabin - Google Patents

Abstract

The invention discloses a fire-proof return air noise reduction device for a ship cabin, which is used for being installed on a cabin board (6) of a ship. The device comprises a return air grille (1) and a muffler box (2), which are respectively installed at the air return opening (61) of the cabin panel (6) from the front and the back, and the muffler box (2) is provided with a return air pipe connection In the interface (7), a return air chamber (8) communicating with the return air opening (61) and the return air pipe connection interface (7) is formed in the muffler box (2); wherein the muffler box (2) is made of porous material and The outer surface is covered with fire protection material, and the return air chamber (8) has a sudden change in cross-sectional shape. The device of the present invention uses porous material to make the muffler box, and the internal air return chamber has a sudden change of section, which can reduce the propagation energy of sound waves passing through the muffler box, achieve the purpose of muffling, help reduce secondary noise, and effectively ensure Fire integrity of ship compartment panels.

Description

A kind of ship cabin fireproof return air muffler device

technical field

The invention relates to the technical field of sound-absorbing devices, in particular to a fire-resisting and air-returning sound-absorbing device for ship cabins, which is particularly suitable for meeting the requirements for sound insulation and fire prevention of ship cabin panels.

Background technique

According to the specifications issued by the International Maritime Organization (IMO), certain sound insulation and noise reduction measures should be taken in ship cabins to protect shipboard personnel from noise. In the cabin of the ship, the return air system will generate secondary noise due to the vibration of the ship during the sailing of the ship, which is the main noise source of the cabin. Therefore, it is necessary to do certain noise reduction treatment on the return air system to reduce the impact of noise. At present, there is an urgent need for a muffler device with simple structure, convenient installation and good effect.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fire-returning air-silencing device for ship cabins, which is used to meet the requirements of existing technical specifications and standards, without changing the fire-proof requirements of ship cabins, to propose a simple structure, convenient installation and good effect. Ship cabin fire-proof return air muffler device.

In order to achieve the above purpose of the invention, the technical solutions adopted in the present invention are as follows.

A fire-returning air-silencing device for a ship cabin is used to be installed on a cabin board of a ship, the cabin board is provided with a return air opening, the device comprises a return air grille and a muffler box, and the return air grille is installed from the front At the air return opening of the cabin panel, the muffler box is installed at the air return opening of the cabin panel from the back, and the muffler box is provided with a return air pipe connection interface away from the return air opening , a return air chamber is formed in the muffler box, and both ends of the return air chamber are respectively connected to the return air opening and the connection interface of the return air pipe; wherein, the muffler box is made of porous material, so the The outer surface of the muffler box is covered with fire protection material, and the air return chamber has a sudden cross-sectional shape.

In a possible implementation manner, the return air chamber includes a first return air chamber and a second return air chamber that are communicated with each other; the cross-sectional shape of the first return air chamber is a trapezoid, and the The air openings are communicated with each other; the second air return chamber is in the shape of a straight pipe and communicates with the connection interface of the air return pipe, and the connection interface of the air return pipe is arranged above the second air return chamber.

In a possible implementation manner, the muffler box is a box-shaped structure formed by bending a single-layer microporous thin steel plate, and the front end of the box-shaped structure connected to the cabin plate has a matching air return opening. Open entrance.

In a possible implementation manner, the box-like structure includes a transverse bottom plate perpendicular to the cabin plate and two vertical side plates (a first vertical side plate and a second vertical side plate), which are parallel to the cabin. The vertical rear panel of the panel, and the multi-segment top panel, the multi-segment top panel includes an inclined top panel, a vertical top panel and a horizontal top panel connected in sequence from the front end to the rear end.

In a possible implementation manner, the connection interface of the return air duct is provided on the lateral top plate.

In a possible implementation manner, the air return grille includes a return air panel provided with a central through hole and a ventilation louver disposed at the central through hole of the return air panel, and the air return panel is mounted on the air return panel through a plurality of fixing screws. On the cabin panel, the ventilation louver blocks the return air opening.

In a possible implementation manner, the ventilation louver is an oblique wedge-shaped sheet-like structure.

In a possible implementation manner, the fire protection material covered on the outer surface of the muffler box includes a fire insulation material located in the inner layer and a surface coating material located in the outer layer.

In a possible implementation manner, the fire-proof and heat-insulating material is fire-proof rock wool or sound-absorbing cotton, and the surface coating material is non-combustible aluminum foil.

Compared with the prior art, by adopting the above technical solutions, the present invention has the following beneficial effects: the device of the present invention utilizes the principle of acoustics, adopts porous materials to make a sound-absorbing box, and the inside of the sound-absorbing box The return air chamber has a sudden change of section, which can reduce the propagation energy of the sound wave passing through the muffler box, achieve the purpose of muffling, reduce the secondary noise generated in the ship's cabin, and effectively ensure the fire-resistant integrity of the ship's cabin plate.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments.

Fig. 1 is a front view of a fireproof return air muffler device for a ship cabin provided by an embodiment of the present invention;

FIG. 2 is a transverse cross-sectional view of a fireproof return air muffler device for a ship cabin provided by an embodiment of the present invention;

3 is a longitudinal cross-sectional view of a fireproof return air muffler device for a ship cabin provided by an embodiment of the present invention;

4 is a perspective view of a muffler box of a fireproof return air muffler device for a ship cabin provided by an embodiment of the present invention;

Fig. 5 is the front view of the air return grill of the fireproof air return muffler device for the ship cabin provided by the embodiment of the present invention;

6 is a side view of a return air grille of a fireproof return air muffler device for a ship cabin provided by an embodiment of the present invention;

FIG. 7 is a working principle diagram of the fireproof return air noise reduction device for a ship cabin provided by an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", "third" and the like in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

The following detailed descriptions are given respectively through specific embodiments.

Please refer to FIG. 1 to FIG. 4 , an embodiment of the present invention provides a fireproof return air noise reduction device for a ship cabin. The device is used to be installed on the cabin panel 6 of the ship. The cabin panel 6 plays a role of space separation, and is usually made of composite panels, which can be called a cabin partition panel or a cabin composite panel. The cabin panel 6 is provided with a return air opening 61 for the air conditioning system. The device of the present invention is located at the return air opening 61 to avoid or weaken the secondary noise generated by the return air system due to the ship's vibration during the sailing of the ship.

The device of the present invention may include a return air grille 1 and a muffler box 2 . The air return grille 1 is installed at the air return opening 61 of the cabin panel 6 from the front, and the muffler box 2 is installed at the air return opening 61 of the cabin panel 6 from the back. The air and sound waves in the cabin can pass through the air return opening 61 through the gap of the air return grille 1 and enter the interior of the muffler box 2 .

The muffler box 2 is provided with a return air pipe connection interface 7 away from the return air opening 61, and a return air chamber 8 is formed in the muffler box 2, and both ends of the return air chamber 8 are respectively connected to the The return air opening 61 is connected to the interface 7 of the return air duct. The return air chamber 8 is used as a transmission pipe, and the sound waves and air entering the muffler box 2 are transmitted to the return air pipe connection interface 7, and then enter the return air pipe.

Among them, in particular: the muffler box 2 is made of porous materials, especially can be made of microporous materials; the outer surface of the muffler box 2 is covered with fire protection materials; the air return chamber 8 has Mutant cross-sectional shape.

The abrupt cross-sectional shape means that the cross-sectional shape of the return air chamber 8 is non-uniform and non-smooth, and can have at least one reflective surface, so that the impedance change can be caused during the propagation of the sound wave, so that the sound wave in propagation cannot be directly transmitted. Instead, the reflection of sound energy is generated. At the same time, the muffler box 2 made of porous material makes the cavity wall of the return air chamber 8 a porous structure to realize the function of sound absorption holes, and part of the sound energy is rubbed in the pores of the porous material and converted into heat energy and dissipated, so that the sound energy is dissipated through the muffler box 2 sound waves are weakened. Therefore, the muffler box 2 can effectively realize the muffler function and reduce the secondary noise generated by the return air system.

In the present invention, the air return chamber 8 may be formed by connecting a plurality of chambers with different shapes. For example, in some embodiments, the return air chamber 8 may include a first return air chamber 81 and a second return air chamber 82 that communicate with each other; the cross-sectional shape of the first return air chamber 81 is a trapezoid, One end of the lower bottom surface of the trapezoid is an open entrance, which is communicated with the return air opening 61; One end is communicated with, and the other end is communicated with the return air pipe connection interface 7 .

Optionally, the return air pipe connection interface 7 is provided above the second return air chamber 82 , that is, the opening direction of the return air pipe connection interface 7 is upward. The return air opening 61 penetrates through the cabin panel 6, and its opening direction is horizontal. In this way, the opening directions of the return air pipe connection interface 7 and the return air opening 61 at both ends of the return air chamber 8 are different to avoid the direct passage of sound waves, so as to ensure that the propagating sound waves are absorbed and consumed by the cavity wall of the porous structure.

Please refer to FIG. 4 , optionally, the muffler box 2 can be a box-shaped structure formed by bending a single-layer microporous thin steel plate, wherein the thickness of the single-layer microporous thin steel plate can be between 0.5mm and 0.7mm. In between, micropores are densely distributed thereon, the diameter of the micropores may be between 1 mm and 5 mm, and the micropores may be through-holes. The front end of the box-like structure connected to the cabin panel 6 has an open inlet matched with the return air opening 61 to realize the communication connection with the return air opening 61 .

Optionally, the box-like structure includes a transverse bottom plate 21 , a first vertical side plate 22 and a second vertical side plate 23 perpendicular to the cabin panel 6 , and a vertical rear panel 24 parallel to the cabin panel 6 . , and a multi-section top plate; the multi-section top plate includes an inclined top plate 25, a vertical top plate 26 and a horizontal top plate 27 which are connected in sequence from the front end to the rear end. Among them, the horizontal bottom plate 21, the first vertical side plate 22, the second vertical side plate 23 and the vertical rear plate 24 can be formed by bending one plate, and the multi-segment top plate can be formed by bending one plate, and two The sheets are spliced into a box-like structure.

Optionally, the return air pipe connection interface 7 is provided on the lateral top plate 27 .

Please refer to FIG. 5 and FIG. 6 , optionally, the air return grille 1 includes a return air panel 11 provided with a central through hole and a ventilation louver 12 disposed at the central through hole of the air return panel 11 . The air return panel 11 A plurality of fixing screws 5 can be installed at the air return opening 61 on the front side of the cabin panel 6 , so that the ventilation louver 12 can block the air return opening 61 . The sound waves and air in the cabin can enter the return air chamber 8 formed in the muffler box 2 through the gap of the ventilation louver 12 . Optionally, the ventilation louver 12 is an oblique wedge-shaped sheet-like structure, and its cross section is roughly in the shape of "︹".

Optionally, the fire protection material covered on the outer surface of the muffler box 2 may include a fire insulation material 3 located in the inner layer and a surface coating material 4 located in the outer layer. Wherein, the fire-proof and heat-insulating material 3 may be fire-proof rock wool or sound-absorbing cotton, and the surface coating material 4 may be non-combustible aluminum foil.

Please refer to FIG. 7 , which is a schematic diagram of the propagation and reflection of sound waves in the air return chamber 8 after entering the muffler box 2 of the device of the present invention. The arrows in the figure indicate the directions of propagation or reflection of sound waves.

As above, the present invention discloses a fireproof return air noise reduction device for a ship cabin, which uses a sound-absorbing box made of porous sound-absorbing material to reduce noise, uses the sound-absorbing material as the inner wall of the airflow channel (ie, the return air chamber), and The sudden change of the cross-sectional shape of the return air chamber can weaken the propagating energy of the sound wave passing through the muffler box to achieve the purpose of noise reduction, which can effectively reduce the generation of secondary noise in the ship's cabin, while taking into account the fire performance requirements of the ship's cabin.

Specifically, the muffler box of the device of the present invention is made of porous material. When the sound wave enters the device, a part of the sound energy is rubbed in the pores of the porous material and converted into heat energy and dissipated, so that the sound wave passing through the device is weakened. At the same time, the device of the present invention is provided with a return air chamber with abrupt cross-section. The return air chamber can be composed of chambers with different cross-sectional shapes. It is a straight tubular second air return chamber, the first air return chamber has a sudden change of section, the second air return chamber can be used as a resonance chamber, and many holes are distributed on the wall of the return air chamber as sound absorption holes. The invention utilizes the acoustic principle of the reflection of sound energy caused by the change of impedance in the process of sound propagation through the sudden change of the section of the return air chamber or the bypass resonant cavity, etc., so that the sound wave propagates in the porous material or the sound absorbing structure. After the cross section of the return air chamber of the propagation duct changes abruptly, reflection and friction are generated, and the sound energy is converted into heat energy and dissipated, so that the noise propagating along the return air chamber attenuates with the distance, so as to achieve the purpose of noise reduction and reduce the secondary noise to people. interference.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or modify some of the technical features. Equivalent replacements are made; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A fireproof return air silencer for a ship cabin is used for being installed on a cabin plate (6) of a ship, a return air opening (61) is formed in the cabin plate (6), and the fireproof return air silencer is characterized in that,

the device comprises an air return grid (1) and a silencing box (2), wherein the air return grid (1) is arranged at an air return opening (61) of the cabin plate (6) from the front side, the silencing box (2) is arranged at the air return opening (61) of the cabin plate (6) from the back side, an air return pipe connecting interface (7) is arranged on the silencing box (2), an air return chamber (8) is formed in the silencing box (2), and two ends of the air return chamber (8) are respectively communicated with the air return opening (61) and the air return pipe connecting interface (7);

the silencing box (2) is made of a porous material, the outer surface of the silencing box (2) is covered with a fireproof protection material, and the return air chamber (8) has an abrupt change section shape.

2. The marine compartment fireproof return air silencing device of claim 1,

the air return chamber (8) comprises a first air return chamber (81) and a second air return chamber (82) which are communicated with each other; the section of the first return air chamber (81) is trapezoidal and is communicated with the return air opening (61); the second air return chamber (82) is in a straight pipe shape and communicated with the air return pipe connecting interface (7), and the air return pipe connecting interface (7) is arranged above the second air return chamber (82).

3. The marine compartment fireproof return air silencing device of claim 2,

the silencing box (2) is of a box-shaped structure formed by bending a single-layer microporous thin steel plate, and the front end of the box-shaped structure, which is connected with the cabin plate (6), is provided with an open inlet matched with the air return opening (61).

4. The marine compartment fireproof return air silencing device of claim 3,

the box-shaped structure comprises a transverse bottom plate (21), a first vertical side plate (22) and a second vertical side plate (23) which are perpendicular to a cabin plate (6), a vertical rear panel (24) which is parallel to the cabin plate (6), and a multi-section type top plate, wherein the multi-section type top plate comprises an inclined top plate (25), a vertical top plate (26) and a transverse top plate (27) which are sequentially connected from the front end to the rear end.

5. The marine compartment fireproof return air silencing device of claim 4,

the air return pipe connecting joint (7) is arranged on the transverse top plate (27).

6. The marine compartment fireproof return air silencing device of claim 1,

the air return grid (1) comprises an air return panel (11) with a central through hole and a ventilation louver (12) arranged at the central through hole of the air return panel (11), the air return panel (11) is installed on the cabin plate (6) through a plurality of fixing screws (5), and the ventilation louver (12) shields the air return opening (61).

7. The marine compartment fireproof return air silencing device of claim 6,

the ventilation louver (12) is of a wedge-shaped sheet structure.

8. The marine compartment fireproof return air silencing device of claim 1,

the fireproof protection material covered on the outer surface of the silencing box (2) comprises a fireproof heat-insulating material (3) positioned on the inner layer and a surface coating material (4) positioned on the outer layer.

9. The marine compartment fireproof return air muffler device of claim 8,

the fireproof heat-insulating material (3) is fireproof rock wool or sound-absorbing cotton, and the surface coating material (4) is a non-combustible aluminum foil.

Images