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

Fireproof return air silencer for ship cabin Download PDF

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Publication number
CN111332413A
CN111332413A CN202010244155.5A CN202010244155A CN111332413A CN 111332413 A CN111332413 A CN 111332413A CN 202010244155 A CN202010244155 A CN 202010244155A CN 111332413 A CN111332413 A CN 111332413A
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CN
China
Prior art keywords
air
return
fireproof
air return
silencing
Prior art date
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Pending
Application number
CN202010244155.5A
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Chinese (zh)
Inventor
陈忠年
黄泽彬
梁耀宏
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HUANAN BUILDING MATERIALS (SHENZHEN) CO Ltd
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HUANAN BUILDING MATERIALS (SHENZHEN) CO Ltd
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Priority to CN202010244155.5A priority Critical patent/CN111332413A/en
Publication of CN111332413A publication Critical patent/CN111332413A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B29/00—Accommodation for crew or passengers not otherwise provided for
    • B63B29/02—Cabins or other living spaces; Construction or arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/108—Rockwool fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/12—Ships

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Ceramic Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention discloses a fireproof return air silencing device for a ship cabin, which is used for being installed on a cabin plate (6) of a ship. The device comprises an air return grid (1) and a silencing box (2), wherein the air return grid and the silencing box are respectively arranged at an air return opening (61) of a cabin plate (6) from the front side and the back side, an air return pipe connecting interface (7) is arranged on the silencing box (2), and an air return chamber (8) communicated with the air return opening (61) and the air return pipe connecting interface (7) is formed in the silencing box (2); wherein, the silencing box (2) is made of porous materials, the outer surface of the silencing box is covered with fireproof protection materials, and the air return chamber (8) has an abrupt change section shape. The device of the invention adopts porous materials to manufacture the silencing box, and the internal air return cavity has an abrupt cross section, so that the propagation energy of sound waves passing through the silencing box can be weakened, the aim of silencing is achieved, the secondary noise is reduced, and meanwhile, the fire-resistant integrity of the ship cabin plate is effectively ensured.

Description

Fireproof return air silencer for ship cabin
Technical Field
The invention relates to the technical field of silencing devices, in particular to a fireproof return air silencing device for a ship cabin, which is particularly suitable for meeting the requirements of sound insulation and fire prevention for a ship cabin plate.
Background
According to the specifications issued by the International Maritime Organization (IMO), certain sound insulation and noise elimination measures should be taken for the ship cabin to protect the personnel on the ship from being damaged by noise. In the cabin of the ship, the air return system generates secondary noise due to the vibration of the ship during the navigation of the ship and is a main noise source of the cabin, so that the air return system needs to be subjected to certain noise elimination treatment to reduce the influence of the noise. At present, a silencer with simple structure, convenient installation and good effect is urgently needed.
Disclosure of Invention
The invention aims to provide a fireproof return air silencing device for a ship cabin, which is used for providing the fireproof return air silencing device for the ship cabin, which has a simple structure, is convenient to install and has a good effect on the premise of not changing the fireproof requirement of the ship cabin according to the requirement of the prior technical specification standard.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows.
A fireproof return air silencing device for a ship cabin is used for being mounted on a cabin plate of a ship, a return air opening is formed in the cabin plate, the device comprises an air return grid and a silencing box, the air return grid is mounted at the return air opening of the cabin plate from the front side, the silencing box is mounted at the return air opening of the cabin plate from the back side, a return air pipe connecting interface far away from the return air opening is arranged on the silencing box, a return air chamber is formed in the silencing box, and two ends of the return air chamber are respectively communicated with the return air opening and the return air pipe connecting interface; the silencing box is made of a porous material, a fireproof protection material covers the outer surface of the silencing box, and the return air chamber is in an abrupt change section shape.
In one possible implementation mode, the return air chamber comprises a first return air chamber and a second return air chamber which are communicated with each other; the section of the first air return cavity is trapezoidal and is communicated with the air return opening; the second air return chamber is in a straight pipe shape and is communicated with the air return pipe connecting interface, and the air return pipe connecting interface is arranged above the second air return chamber.
In a possible implementation manner, the silencing 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, which is connected with the cabin plate, is provided with an open inlet matched with the return air opening.
In a possible implementation, the box-like structure comprises a transverse bottom plate and two vertical side plates (a first vertical side plate and a second vertical side plate) perpendicular to the cabin plate, a vertical rear plate parallel to the cabin plate, and a multi-section top plate comprising an inclined top plate, a vertical top plate and a transverse top plate which are connected in sequence from a front end to a rear end.
In a possible implementation manner, the return air pipe connection interface is arranged on the transverse top plate.
In one possible implementation mode, the return air grid comprises a return air panel with a central through hole and a ventilation louver arranged at the central through hole of the return air panel, the return air panel is mounted on the cabin plate through a plurality of fixing screws, and the ventilation louver shields the return air opening.
In a possible implementation, the ventilation louver has a wedge-shaped sheet structure.
In one possible implementation, the fireproof protection material covered on the outer surface of the silencing box comprises fireproof heat-insulating material positioned on the inner layer and surface coating material positioned on the outer layer.
In one possible implementation manner, the fireproof heat-insulating material is fireproof rock wool or sound-absorbing cotton, and the surface coating material is a non-combustible aluminum foil.
Compared with the prior art, the fireproof return air silencing device for the ship cabin has the following beneficial effects by adopting the technical scheme: the device of the invention utilizes the acoustic principle, adopts porous materials to manufacture the silencing box, and the return air chamber in the silencing box has the abrupt cross section, so that the propagation energy of sound waves passing through the silencing box can be weakened, the aim of silencing is achieved, the secondary noise generated in the ship cabin is reduced, and the fire-resistant integrity of the ship cabin plate is effectively ensured.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.
Fig. 1 is a front view of a fire-resistant return air silencer for a ship cabin according to an embodiment of the invention;
fig. 2 is a transverse cross-sectional view of a fire-rated return air silencer for a ship compartment according to an embodiment of the present invention;
fig. 3 is a longitudinal sectional view of a fire-resistant return air silencer for a ship cabin according to an embodiment of the invention;
fig. 4 is a perspective view of a sound-deadening box of the fireproof return air silencing device for the ship cabin according to the embodiment of the invention;
fig. 5 is a front view of a return air grid of a marine vessel compartment fireproof return air silencer assembly according to an embodiment of the present invention;
fig. 6 is a side view of a return air grate of a marine vessel compartment fireproof return air silencer assembly according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the operation of the fireproof return air silencing device for the ship cabin according to the embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, and in the above-described drawings, are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The following are detailed descriptions of the respective embodiments.
Referring to fig. 1 to 4, an embodiment of the present invention provides a fireproof return air silencer for a ship cabin. The device is used for being installed on a cabin plate 6 of a ship, the cabin plate 6 plays a role in space separation and is usually made of composite plates, and the composite plates can be called cabin separation plates or cabin composite plates. The cabin plate 6 is provided with a return air opening 61 for an air conditioning system. The present invention is provided at the return air opening 61 for preventing or attenuating secondary noise generated by the return air system due to ship vibration during ship navigation.
The inventive device may comprise a return air grid 1 and a sound-damping box 2. Wherein the return air grill 1 is mounted at the return air opening 61 of the cabin panel 6 from the front, and the sound-deadening box 2 is mounted at the return air opening 61 of the cabin panel 6 from the rear. Air and sound waves in the cabin can pass through the gap of the return air grid 1, pass through the return air opening 61 and enter the interior of the silencing box 2.
The silencing box 2 is provided with a return air pipe connecting interface 7 far away from the return air opening 61, a return air chamber 8 is formed in the silencing box 2, and two ends of the return air chamber 8 are respectively communicated with the return air opening 61 and the return air pipe connecting interface 7. The air return chamber 8 is used as a propagation pipeline, and sound waves and air entering the interior of the silencing box 2 are propagated to the air return pipe connecting interface 7 and enter the air return pipe.
Among these, in particular: the silencing box 2 is made of porous materials, and particularly can be made of microporous materials; the outer surface of the silencing box 2 is covered with a fireproof protection material; the return air compartment 8 has an abrupt cross-sectional shape.
The abrupt cross-sectional shape means that the cross-sectional shape of the return air compartment 8 is non-uniform and non-smooth, and may have at least one reflecting surface, thereby causing a change in impedance during the propagation of the sound wave, so that the propagating sound wave cannot pass directly but instead causes a reflection of the sound energy. Meanwhile, the silencing box 2 made of porous materials enables the cavity wall of the air return cavity 8 to be of a porous structure to achieve the function of a sound absorption hole, and a part of sound energy is rubbed in the pores of the porous materials and converted into heat energy to be dissipated, so that the sound wave passing through the silencing box 2 is weakened. Therefore, the silencing box 2 can effectively realize the silencing function and reduce the secondary noise generated by the air return system.
In the invention, the air return chamber 8 can be formed by communicating a plurality of chambers with different shapes. For example, in some embodiments, the return air compartment 8 may include a first return air compartment 81 and a second return air compartment 82 in communication; the first return air chamber 81 is trapezoidal in cross section, and one end of the lower bottom surface of the trapezoid is an open inlet and communicated with the return air opening 61; the second return air chamber 82 is in a straight tube shape, specifically, a rectangular tube shape, one end of which is communicated with one end of the trapezoidal upper bottom surface of the first return air chamber 81, and the other end of which is communicated with the return air pipe connection joint 7.
Optionally, the return air duct connection joint 7 is arranged above the second return air chamber 82, that is, the opening direction of the return air duct connection joint 7 is upward. While the return air opening 61 is formed through the cabin panel 6 with its opening direction being horizontal. Thus, the opening directions of the return air pipe connecting interfaces 7 at the two ends of the return air chamber 8 and the return air opening 61 are different, so that the sound waves are prevented from directly passing through, and the propagated sound waves are ensured to be absorbed and consumed by the cavity wall of the porous structure.
Referring to fig. 4, alternatively, the silencing box 2 may 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 may be between 0.5mm and 0.7mm, micropores are densely distributed on the single-layer microporous thin steel plate, the diameter of each micropore may be between 1mm and 5mm, and each micropore may be a through hole. The front end of the box-shaped structure connected with the cabin plate 6 is provided with an open inlet matched with the return air opening 61, so that the box-shaped structure is communicated and connected with the return air opening 61.
Optionally, the box-like structure comprises a transverse bottom plate 21 and first and second vertical side plates 22, 23 perpendicular to the cabin plate 6, a vertical rear plate 24 parallel to the cabin plate 6, and a multi-section top plate; the multi-section 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. Wherein, horizontal bottom plate 21, first vertical curb plate 22, second vertical curb plate 23 and vertical rear panel 24 can be buckled by a panel and form, and multistage formula roof can be buckled by a panel and form, and two panels splice into box structure.
Optionally, the return air pipe connection joint 7 is arranged on the transverse top plate 27.
Referring to fig. 5 and 6, optionally, the return air grille 1 includes a return air panel 11 having a central through hole and a ventilation louver 12 disposed at the central through hole of the return air panel 11, wherein the return air panel 11 can be mounted at a return air opening 61 on the front surface of the cabin panel 6 by a plurality of fixing screws 5, so that the ventilation louver 12 blocks the return air opening 61. The sound waves and air in the cabin can enter the return air chamber 8 formed in the silencing box 2 through the gaps of the ventilation louver 12. Optionally, the ventilation louver 12 is a tapered wedge-shaped sheet structure with a cross section substantially in the shape of "the mouth".
Optionally, the fireproof protective material covered on the outer surface of the sound-deadening box 2 can comprise a fireproof heat-insulating material 3 positioned on the inner layer and a surface coating material 4 positioned on the outer layer. The fireproof heat-insulating material 3 may be fireproof rock wool or sound-absorbing cotton, and the surface coating material 4 may be a non-combustible aluminum foil.
Fig. 7 is a schematic view showing the sound waves propagating and reflecting inside the return air compartment 8 after entering the sound-deadening box 2 of the device of the present invention, and arrows in the drawing indicate the directions of propagation and reflection of the sound waves.
The invention discloses a fireproof return air silencing device for a ship cabin, which reduces noise by using a silencing box made of porous sound-absorbing materials, takes the sound-absorbing materials as the inner wall of an airflow channel (namely a return air chamber), and weakens the transmission energy of sound waves passing through the silencing box by using the sudden change of the section shape of the return air chamber so as to achieve the aim of silencing, thereby effectively reducing the generation of secondary noise in the ship cabin and simultaneously considering the requirement of the fireproof performance of the ship cabin.
Specifically, the silencing box of the device is made of porous materials, when sound waves enter the device, a part of sound energy is rubbed in pores of the porous materials and converted into heat energy to be dissipated, and the sound waves passing through the device are weakened. Meanwhile, the device is provided with a return air chamber with an abrupt cross section, the return air chamber can be formed by combining chambers with different cross section shapes, for example, the device can be a first return air chamber with a trapezoidal cross section at the front end and a straight tubular second return air chamber at the rear end, the first return air chamber is provided with an abrupt cross section, the second return air chamber can be used as a resonant cavity, and a plurality of holes are distributed on the wall of the return air chamber and used as sound absorbing holes. The invention utilizes the acoustic principle that the sound energy is reflected by the impedance change caused by the sudden change of the section of the return air chamber or the nearby resonant cavity and the like in the sound transmission process, so that the sound waves are transmitted in a porous material or a sound absorption structure, and the sound energy is converted into heat energy to be dissipated by the reflection and the friction generated after the sudden change of the section of the return air chamber serving as a transmission pipeline, so that the noise transmitted along the return air chamber is attenuated along with the distance, thereby achieving the aim of silencing and reducing the interference of secondary noise to people.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding 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.
CN202010244155.5A 2020-03-31 2020-03-31 Fireproof return air silencer for ship cabin Pending CN111332413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010244155.5A CN111332413A (en) 2020-03-31 2020-03-31 Fireproof return air silencer for ship cabin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010244155.5A CN111332413A (en) 2020-03-31 2020-03-31 Fireproof return air silencer for ship cabin

Publications (1)

Publication Number Publication Date
CN111332413A true CN111332413A (en) 2020-06-26

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CN202010244155.5A Pending CN111332413A (en) 2020-03-31 2020-03-31 Fireproof return air silencer for ship cabin

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111959740A (en) * 2020-08-20 2020-11-20 广船国际有限公司 Ship cabin sanitary unit and ship

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111959740A (en) * 2020-08-20 2020-11-20 广船国际有限公司 Ship cabin sanitary unit and ship

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