CN210692080U - Silencing device for explosive equipment - Google Patents
Silencing device for explosive equipment Download PDFInfo
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- CN210692080U CN210692080U CN201921073996.3U CN201921073996U CN210692080U CN 210692080 U CN210692080 U CN 210692080U CN 201921073996 U CN201921073996 U CN 201921073996U CN 210692080 U CN210692080 U CN 210692080U
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Abstract
The present disclosure provides a muffling device for an explosive device, comprising: the shell comprises a first end part, a main body part and a second end part, wherein the first end part, the main body part and the second end part are of an integral structure, and the main body part is arranged between the first end part and the second end part; the metal micro-perforated plate is arranged in the shell and positioned between the first end part and the second end part, and a first cavity is formed between the metal micro-perforated plate and the main body part; the acoustic metamaterial film is arranged in the first cavity; and the mass sheet is attached to the acoustic metamaterial film.
Description
Technical Field
The utility model belongs to the technical field of noise elimination, the utility model especially relates to a noise eliminator for explosion equipment.
Background
The explosion venting technology is an effective disaster reduction technical means for preventing the explosion disaster of combustible gas or combustible dust in industrial production. Due to space limitation, equipment density and other factors, in order to prevent surrounding damage caused by flame and pressure sprayed from an explosion venting port during explosion venting, enterprises often adopt a conduit explosion venting mode to carry out safe explosion venting design of equipment when carrying out dust explosion-proof safety design or hidden danger treatment, and install a conduit outside the explosion venting port to guide explosion to a safety zone. Usually, an explosion experimental device is adopted to simulate the explosion characteristics of the explosion experimental device, high-temperature and high-decibel shock waves generated by the explosion experimental device have directivity, and instantaneous noise sound is huge, so that once the shock waves occur, the human body is extremely easy to be injured. Therefore, the instantaneous noise caused when the conduit of the explosion experimental device is exploded needs to be effectively controlled.
The noise elimination device in the prior art has poor noise elimination effect due to the reasons of complex structure, heavy weight, high-temperature oxidation sound absorption filler, high-speed airflow impact sound absorption filler, water vapor permeation sound absorption filler and the like.
SUMMERY OF THE UTILITY MODEL
To solve at least one of the above technical problems, the present disclosure provides a noise damping device for an explosive device. The silencing device for the explosive device is realized by the following technical scheme.
The present disclosure provides a muffling device for an explosive device, comprising:
the shell comprises a first end part, a main body part and a second end part, wherein the first end part, the main body part and the second end part are of an integral structure, and the main body part is arranged between the first end part and the second end part;
the metal micro-perforated plate is arranged in the shell and positioned between the first end part and the second end part, and a first cavity is formed between the metal micro-perforated plate and the main body part;
the acoustic metamaterial film is arranged in the first cavity; and
and the mass sheet is attached to the acoustic metamaterial film.
According to at least one embodiment of the present disclosure, the sound-damping device further comprises a porous material layer disposed between the metal microperforated panel and the acoustic metamaterial membrane, the porous material layer being attached to the metal microperforated panel.
According to at least one embodiment of the present disclosure, between the acoustic metamaterial film and the main body portion, along an axial direction of the main body portion, the first cavity is divided into at least two back cavities, and a height-adjustable magnet is arranged in each back cavity along a circumferential direction of the housing.
According to at least one embodiment of the present disclosure, the first cavity is partitioned into at least two back cavities by a metal material.
According to at least one embodiment of the present disclosure, a plurality of height adjustable magnets are discretely arranged along a circumferential direction of the housing within each back cavity.
According to at least one embodiment of the present disclosure, a plurality of height-adjustable magnets are continuously arranged along the circumference of the housing within each back cavity.
According to at least one embodiment of the present disclosure, the pore size of the porous material layer and the pore size of the metal microperforated panel are not exactly the same.
According to at least one embodiment of the present disclosure, at least two sets of mass plates are arranged in the axial direction of the housing, and a plurality of mass plates in each set of mass plates are separately arranged in the circumferential direction of the housing.
According to at least one embodiment of the present disclosure, at least two sets of mass plates are arranged in the axial direction of the housing, and a plurality of mass plates in each set of mass plates are arranged continuously in the circumferential direction of the housing.
According to at least one embodiment of the present disclosure, a set of mass plates corresponds to one back cavity.
According to at least one embodiment of the present disclosure, each mass plate of each set of mass plates corresponds to a respective magnet within the back cavity to which the set of mass plates corresponds.
According to at least one embodiment of the present disclosure, the mass sheet is a ferromagnetic material.
The noise elimination device for the explosion equipment has the multi-frequency broadband noise elimination characteristic, effectively reduces noise generated by high-temperature impact sound waves generated by the explosion equipment or an explosion experimental device, and reduces damage to a human body and a hearing system caused by the impact sound waves.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a cross-sectional structure schematic view of a muffler device according to one embodiment of the present disclosure.
Fig. 2 is a cross-sectional structure schematic view of a muffler device according to another embodiment of the present disclosure.
Fig. 3 is a cross-sectional structure schematic view of a muffler device according to still another embodiment of the present disclosure.
Description of the reference numerals
100 sound-deadening device
101 first end part
102 second end portion
103 main body part
104 metal microperforated plate
105 porous material layer
106 mass pieces
107 acoustic metamaterial thin film
108 expansion cavity
109 magnet
110 partition part
111 back cavity.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," "below … …," "below … …," "below," "above … …," "above," "… …," "higher," and "side (e.g., as in" side walls ") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
Fig. 1 is a cross-sectional structure schematic view of a muffler device according to one embodiment of the present disclosure. As shown in fig. 1, the muffler device 100 includes:
a housing including a first end portion 101, a main body portion 103, and a second end portion 102, the first end portion 101, the main body portion 103, and the second end portion 102 being an integral structure, the main body portion 103 being disposed between the first end portion 101 and the second end portion 102;
a metal microperforated panel 104 disposed within the housing between the first end 101 and the second end 102, the metal microperforated panel 104 and the body 103 forming a first cavity therebetween;
an acoustic metamaterial membrane 107 disposed within the first cavity; and
and the mass sheet 106, wherein the mass sheet 106 is attached to the acoustic metamaterial film 107.
The material of the shell is preferably an alloy material, a steel material or an aluminum material, the shape of the shell is preferably a cylinder shape, the shell can be further configured to be similar to an elliptic cylinder shape, a square shape or a rectangular parallelepiped shape, and the shape of the shell is not particularly limited in the present disclosure. The housing shown in fig. 1 is a hollow structure, and the axial dimensions of the first end portion 101 and the second end portion 102 of the housing shown in fig. 1 are substantially the same, but the size of the first end portion 101 and the size of the second end portion 102 and the size ratio of the two are not particularly limited in the present disclosure. As will be appreciated by those skilled in the art, axial is the direction indicated by the arrow in FIG. 1.
The metal microperforated panel 104 is disposed between the first end portion 101 and the second end portion 102, and the metal microperforated panel 104 and the main body 103 form a first cavity therebetween, i.e., the first cavity is defined by the metal microperforated panel 104, the side walls of the main body 103, and both end walls of the main body 103. it will be understood by those skilled in the art that the metal microperforated panel 104 has a shape that matches that of the housing, and when the housing is preferably cylindrical, the metal microperforated panel 104 is also configured in a cylindrical shape, and when the housing is preferably rectangular parallelepiped, the metal microperforated panel 104 is also configured in a rectangular parallelepiped shape. Preferably, the aperture sizes of the plurality of perforations of the metal microperforated panel 104 are the same, and the numerical value of the aperture sizes of the plurality of perforations of the metal microperforated panel 104 is not particularly limited by this disclosure.
The acoustic metamaterial film 107 also has a shape matched with the shell, and when the shell is preferably in a cylindrical shape, the acoustic metamaterial film 107 is also configured in a cylindrical shape, and when the shell is preferably in a rectangular parallelepiped shape, the acoustic metamaterial film 107 is also configured in a rectangular parallelepiped shape.
As can be seen from fig. 1, in this embodiment, most preferably, the radial dimension of the metal microperforated panel 104 is the same as the radial dimension of the first end 101 of the casing and the radial dimension of the second end 102 of the casing. The present disclosure is not particularly limited to the radial dimensions of the metal microperforated panel 104, the first end 101, and the second end 102, nor is the ratio of the radial dimensions of the metal microperforated panel 104 to the radial dimensions of the first end 101 (or the second end 102) particularly limited, for example, one skilled in the art could set the radial dimensions of the metal microperforated panel 104 to be greater than the radial dimensions of the first end 101 (or the second end 102) of the casing. It should be noted that, preferably, the radial dimension of the first end 101 of the housing is the same as the radial dimension of the second end 102 of the housing.
The acoustic metamaterial film 107 is preferably a PET film or a silica gel film, and the purpose of sound absorption is achieved by utilizing the negative mass characteristic and the local mass resonance characteristic of the acoustic metamaterial film in a motion state. By attaching the mass sheet 106 to the acoustic metamaterial film 107, local mass resonance of the acoustic metamaterial film is enhanced, and the sound absorption effect is enhanced.
In this embodiment, the muffling apparatus 100 further includes a porous material layer 105, the porous material layer 105 is disposed between the metal micro-perforated plate 104 and the acoustic metamaterial film 107, and the porous material layer 105 is attached to the metal micro-perforated plate 104. The plurality of pores configured in the porous material layer 105 are preferably closed pores (i.e., closed pores), and preferably the plurality of pores configured in the porous material layer 105 have a plurality of pore sizes, e.g., the plurality of pores have two pore sizes, three pore sizes, or even more pore sizes. The present disclosure does not numerically specifically limit the pore size of the plurality of pores provided in the porous material layer 105. Preferably, the mass plate 106 is arranged on the side of the acoustic metamaterial membrane 107 facing the porous material layer 105.
It should be noted that the distance from the acoustic metamaterial film 107 to the porous material layer 105 is not particularly limited in the present disclosure, and preferably, a person skilled in the art may set the distance from the acoustic metamaterial film 107 to the porous material layer 105 to be 1mm to 50 mm.
As can be seen from fig. 1, 4 groups of mass plates 106 are arranged on the inner wall of the acoustic metamaterial film 107 along the axial direction of the housing, and those skilled in the art can also arrange other number of groups of mass plates 106, such as 3 groups, 5 groups, etc.
Each set of mass plates 106 includes a plurality of mass plates, for example, 3, 4, 5 or even more, and preferably, the plurality of mass plates are separately arranged along the circumferential direction of the housing. The plurality of mass plates in each set of mass plates 106 may also be arranged continuously along the circumferential direction of the housing. The shape and size of the mass plate are not particularly limited in this disclosure, and the shape of the mass plate may be circular, oval, square, rectangular, or the like.
In the muffler device 100 of the present embodiment, for the high-temperature and high-decibel shock waves generated by the explosive device, a part of the sound waves is reflected back through the expansion cavity 108, and the rest part of the sound waves is transmitted to the porous material layer 105 through the metal micro-perforated plate 104 to further consume the sound energy and reduce the temperature; the transmitted sound wave continuously propagates to a resonance unit formed by the acoustic metamaterial film 107 and the additional mass plate 106, and resonance sound absorption is realized.
Fig. 2 is a cross-sectional structure schematic view of a muffler device according to another embodiment of the present disclosure. As a more preferred embodiment, fig. 2 shows a muffler device 100 including:
a housing including a first end portion 101, a main body portion 103, and a second end portion 102, the first end portion 101, the main body portion 103, and the second end portion 102 being an integral structure, the main body portion 103 being disposed between the first end portion 101 and the second end portion 102;
a metal microperforated panel 104 disposed within the housing between the first end 101 and the second end 102, the metal microperforated panel 104 and the body 103 forming a first cavity therebetween;
an acoustic metamaterial membrane 107 disposed within the first cavity; and
and the mass sheet 106, wherein the mass sheet 106 is attached to the acoustic metamaterial film 107.
The material of the shell is preferably an alloy material, a steel material or an aluminum material, the shape of the shell is preferably a cylinder shape, the shell can be further configured to be similar to an elliptic cylinder shape, a square shape or a rectangular parallelepiped shape, and the shape of the shell is not particularly limited in the present disclosure. The housing shown in fig. 2 is a hollow structure, and the axial dimensions of the first end portion 101 and the second end portion 102 of the housing shown in fig. 2 are substantially the same, but the size of the first end portion 101 and the size of the second end portion 102 and the size ratio of the two are not particularly limited in the present disclosure. As will be appreciated by those skilled in the art, axial is the direction indicated by the arrows in FIG. 2.
The metal microperforated panel 104 is disposed between the first end portion 101 and the second end portion 102, and the metal microperforated panel 104 and the main body 103 form a first cavity therebetween, i.e., the first cavity is defined by the metal microperforated panel 104, the side walls of the main body 103, and both end walls of the main body 103. it will be understood by those skilled in the art that the metal microperforated panel 104 has a shape that matches that of the housing, and when the housing is preferably cylindrical, the metal microperforated panel 104 is also configured in a cylindrical shape, and when the housing is preferably rectangular parallelepiped, the metal microperforated panel 104 is also configured in a rectangular parallelepiped shape. Preferably, the aperture sizes of the plurality of perforations of the metal microperforated panel 104 are the same, and the numerical value of the aperture sizes of the plurality of perforations of the metal microperforated panel 104 is not particularly limited by this disclosure.
The acoustic metamaterial film 107 also has a shape matched with the shell, and when the shell is preferably in a cylindrical shape, the acoustic metamaterial film 107 is also configured in a cylindrical shape, and when the shell is preferably in a rectangular parallelepiped shape, the acoustic metamaterial film 107 is also configured in a rectangular parallelepiped shape.
As can be seen from fig. 2, in this embodiment, most preferably, the radial dimension of the metal microperforated panel 104 is the same as the radial dimension of the first end 101 of the casing and the radial dimension of the second end 102 of the casing. The present disclosure is not particularly limited to the radial dimensions of the metal microperforated panel 104, the first end 101, and the second end 102, nor is the ratio of the radial dimensions of the metal microperforated panel 104 to the radial dimensions of the first end 101 (or the second end 102) particularly limited, for example, one skilled in the art could set the radial dimensions of the metal microperforated panel 104 to be greater than the radial dimensions of the first end 101 (or the second end 102) of the casing. It should be noted that, preferably, the radial dimension of the first end 101 of the housing is the same as the radial dimension of the second end 102 of the housing.
The acoustic metamaterial film 107 is preferably a PET film or a silica gel film, and the purpose of sound absorption is achieved by utilizing the negative mass characteristic and the local mass resonance characteristic of the acoustic metamaterial film in a motion state. By attaching the mass sheet 106 to the acoustic metamaterial film 107, local mass resonance of the acoustic metamaterial film is enhanced, and the sound absorption effect is enhanced.
In this embodiment, the muffling apparatus 100 further includes a porous material layer 105, the porous material layer 105 is disposed between the metal micro-perforated plate 104 and the acoustic metamaterial film 107, and the porous material layer 105 is attached to the metal micro-perforated plate 104. The plurality of pores configured in the porous material layer 105 are preferably closed pores (i.e., closed pores), and preferably the plurality of pores configured in the porous material layer 105 have a plurality of pore sizes, e.g., the plurality of pores have two pore sizes, three pore sizes, or even more pore sizes. The present disclosure does not numerically specifically limit the pore size of the plurality of pores provided in the porous material layer 105. Preferably, the mass plate 106 is arranged on the side of the acoustic metamaterial membrane 107 facing the porous material layer 105.
It should be noted that the distance from the acoustic metamaterial film 107 to the porous material layer 105 is not particularly limited in the present disclosure, and preferably, a person skilled in the art may set the distance from the acoustic metamaterial film 107 to the porous material layer 105 to be 1mm to 50 mm.
As can be seen from fig. 2, 4 groups of mass plates 106 are arranged on the inner wall of the acoustic metamaterial film 107 along the axial direction of the housing, and those skilled in the art can also arrange other number of groups of mass plates 106, such as 3 groups, 5 groups, etc.
Each set of mass plates 106 includes a plurality of mass plates, for example, 3, 4, 5 or even more, and preferably, the plurality of mass plates are separately arranged along the circumferential direction of the housing. The plurality of mass plates in each set of mass plates 106 may also be arranged continuously along the circumferential direction of the housing. The shape and size of the mass plate are not particularly limited in this disclosure, and the shape of the mass plate may be circular, oval, square, rectangular, or the like.
In this embodiment, between the acoustic metamaterial film 107 and the main body 103 of the housing, the first cavity is divided into at least two back cavities 111 along the axial direction of the main body 103 of the housing, 4 back cavities 111 are shown in fig. 2, and a height-adjustable magnet 109 is arranged in each back cavity 111 along the circumferential direction of the housing. A set of magnets 109 is disposed within each back cavity 111 in fig. 2. The magnet 109 is preferably disposed on a side wall of the body portion 103 of the housing. Preferably, the first cavity is divided into the at least two back cavities 111 by a partition 110, and the partition 110 is preferably a metal material. Fig. 2 shows 3 partitions 110, and 3 partitions 110 divide the first cavity into 4 back cavities.
In fig. 2, a set of mass plates 106 corresponds to one back cavity 111. Each mass plate in each set of mass plates 106 corresponds to a respective magnet 109 in the back cavity corresponding to that set of mass plates. The mass plate 106 is a ferromagnetic material. A set of mass plates 106 corresponds to a set of magnets 109.
It will be appreciated by those skilled in the art that the divider 110 and the housing have matching shapes. For example, when the housing is provided in a cylindrical shape, the partition 110 is provided in a circular ring shape.
In this embodiment, the mass plate 106 is preferably a ferromagnetic material or ferrous metal to facilitate attraction of the magnet 109 to the mass plate 106.
In the present embodiment, a plurality of height-adjustable magnets 109 are arranged in each back cavity 111 in a discrete manner along the circumferential direction of the housing. One skilled in the art may also arrange a set of multiple height adjustable magnets 109 in each back cavity 111 in series along the circumference of the housing.
In the muffler device 100 of the present embodiment, for the high-temperature and high-decibel shock waves generated by the explosive device, a part of the sound waves is reflected back through the expansion cavity 108, and the rest part of the sound waves is transmitted to the porous material layer 105 through the metal micro-perforated plate 104 to further consume the sound energy and reduce the temperature; the transmitted sound waves are continuously transmitted to a resonance unit formed by the acoustic metamaterial thin film 107 and the additional mass plate 106, resonance sound absorption is achieved, the resonance frequency of the back cavity 111 is reduced through negative rigidity formed by adjusting the height of the magnet 109 in each back cavity 111, different low-frequency resonance frequencies are combined, and sound wave absorption of low-frequency broadband is achieved.
Fig. 3 is a cross-sectional structure schematic view of a muffler device according to still another embodiment of the present disclosure. Fig. 3 shows a muffler device 100 comprising:
a housing including a first end portion 101, a main body portion 103, and a second end portion 102, the first end portion 101, the main body portion 103, and the second end portion 102 being an integral structure, the main body portion 103 being disposed between the first end portion 101 and the second end portion 102;
a metal microperforated panel 104 disposed within the housing between the first end 101 and the second end 102, the metal microperforated panel 104 and the body 103 forming a first cavity therebetween;
an acoustic metamaterial membrane 107 disposed within the first cavity; and
and the mass sheet 106, wherein the mass sheet 106 is attached to the acoustic metamaterial film 107.
The material of the shell is preferably an alloy material, a steel material or an aluminum material, the shape of the shell is preferably a cylinder shape, the shell can be further configured to be similar to an elliptic cylinder shape, a square shape or a rectangular parallelepiped shape, and the shape of the shell is not particularly limited in the present disclosure. The housing 101102103 shown in fig. 3 is a hollow structure, and the axial dimensions of the first end 101 and the second end 102 of the housing shown in fig. 3 are substantially the same, but the size of the first end 101 and the size of the second end 102 and the size ratio of the two are not particularly limited by the present disclosure. As will be appreciated by those skilled in the art, axial is the direction indicated by the arrows in FIG. 3.
The metal microperforated panel 104 is disposed between the first end portion 101 and the second end portion 102, and the metal microperforated panel 104 and the main body 103 form a first cavity therebetween, i.e., the first cavity is defined by the metal microperforated panel 104, the side walls of the main body 103, and both end walls of the main body 103. it will be understood by those skilled in the art that the metal microperforated panel 104 has a shape that matches that of the housing, and when the housing is preferably cylindrical, the metal microperforated panel 104 is also configured in a cylindrical shape, and when the housing is preferably rectangular parallelepiped, the metal microperforated panel 104 is also configured in a rectangular parallelepiped shape. Preferably, the aperture sizes of the plurality of perforations of the metal microperforated panel 104 are the same, and the numerical value of the aperture sizes of the plurality of perforations of the metal microperforated panel 104 is not particularly limited by this disclosure.
The acoustic metamaterial film 107 also has a shape matched with the shell, and when the shell is preferably in a cylindrical shape, the acoustic metamaterial film 107 is also configured in a cylindrical shape, and when the shell is preferably in a rectangular parallelepiped shape, the acoustic metamaterial film 107 is also configured in a rectangular parallelepiped shape.
As can be seen from fig. 3, in this embodiment, most preferably, the radial dimension of the metal microperforated panel 104 is the same as the radial dimension of the first end 101 of the casing and the radial dimension of the second end 102 of the casing. The present disclosure is not particularly limited to the radial dimensions of the metal microperforated panel 104, the first end 101, and the second end 102, nor is the ratio of the radial dimensions of the metal microperforated panel 104 to the radial dimensions of the first end 101 (or the second end 102) particularly limited, for example, one skilled in the art could set the radial dimensions of the metal microperforated panel 104 to be greater than the radial dimensions of the first end 101 (or the second end 102) of the casing. It should be noted that, preferably, the radial dimension of the first end 101 of the housing is the same as the radial dimension of the second end 102 of the housing.
The acoustic metamaterial film 107 is preferably a PET film or a silica gel film, and the purpose of sound absorption is achieved by utilizing the negative mass characteristic and the local mass resonance characteristic of the acoustic metamaterial film in a motion state. By attaching the mass sheet 106 to the acoustic metamaterial film 107, local mass resonance of the acoustic metamaterial film is enhanced, and the sound absorption effect is enhanced.
In this embodiment, the muffling apparatus 100 further includes a porous material layer 105, the porous material layer 105 is disposed between the metal micro-perforated plate 104 and the acoustic metamaterial film 107, and the porous material layer 105 is attached to the metal micro-perforated plate 104. The plurality of pores configured in the porous material layer 105 are preferably closed pores (i.e., closed pores), and preferably the plurality of pores configured in the porous material layer 105 have a plurality of pore sizes, e.g., the plurality of pores have two pore sizes, three pore sizes, or even more pore sizes. The present disclosure does not numerically specifically limit the pore size of the plurality of pores provided in the porous material layer 105. Preferably, the mass plate 106 is arranged on the side of the acoustic metamaterial membrane 107 facing the porous material layer 105.
It should be noted that the distance from the acoustic metamaterial film 107 to the porous material layer 105 is not particularly limited in the present disclosure, and preferably, a person skilled in the art may set the distance from the acoustic metamaterial film 107 to the porous material layer 105 to be 1mm to 50 mm.
As can be seen from fig. 3, 4 groups of mass plates 106 are arranged on the inner wall of the acoustic metamaterial film 107 along the axial direction of the housing, and those skilled in the art can also arrange other number of groups of mass plates 106, such as 3 groups, 5 groups, etc.
Each set of mass plates 106 includes a plurality of mass plates, for example, 3, 4, 5 or even more, and preferably, the plurality of mass plates of each set of mass plates 106 are separately arranged along the circumferential direction of the housing. The plurality of mass plates in each set of mass plates 106 may also be arranged continuously along the circumferential direction of the housing. The shape and size of the mass plate are not particularly limited in this disclosure, and the shape of the mass plate may be circular, oval, square, rectangular, or the like.
In this embodiment, between the acoustic metamaterial film 107 and the main body 103 of the housing, the first cavity is divided into at least two back cavities 111 along the axial direction of the main body 103 of the housing, 2 back cavities 111 are shown in fig. 3, and a height-adjustable magnet 109 is arranged in each back cavity 111 along the circumferential direction of the housing. In fig. 3, 2 sets of magnets 109 are disposed in each back cavity 111 along the axial direction of the housing, and the magnets 109 are preferably disposed on the side wall of the main body 103 of the housing. Preferably, the first cavity is divided into the at least two back cavities 111 by a partition 110, and the partition 110 is preferably a metal material. Fig. 3 shows 1 partition 110, and 1 partition 110 divides the first cavity into 2 back cavities 111.
In fig. 3, two sets of mass plates 106 correspond to one back cavity 111. Each mass plate in each set of mass plates 106 corresponds to a respective magnet 109 in the back cavity corresponding to that set of mass plates. The mass plate 106 is a ferromagnetic material. A set of mass plates 106 corresponds to a set of magnets 109.
It will be appreciated by those skilled in the art that the divider 110 and the housing have matching shapes. For example, when the housing is provided in a cylindrical shape, the partition 110 is provided in a circular ring shape.
In this embodiment, the mass plate 106 is preferably a ferromagnetic material or ferrous metal to facilitate attraction of the magnet 109 to the mass plate 106.
In the present embodiment, in each back cavity 111, a plurality of height-adjustable magnets 109 in each set of magnets 109 are arranged separately along the circumferential direction of the housing. It is also within each back cavity 111 that the plurality of height adjustable magnets 109 in each set of magnets 109 are arranged continuously along the circumference of the housing.
In the muffler device 100 of the present embodiment, for the high-temperature and high-decibel shock waves generated by the explosive device, a part of the sound waves is reflected back through the expansion cavity 108, and the rest part of the sound waves is transmitted to the porous material layer 105 through the metal micro-perforated plate 104 to further consume the sound energy and reduce the temperature; the transmitted sound waves are continuously transmitted to a resonance unit formed by the acoustic metamaterial thin film 107 and the additional mass plate 106, resonance sound absorption is achieved, the resonance frequency of the back cavity 111 is reduced through negative rigidity formed by adjusting the height of the magnet 109 in each back cavity 111, different low-frequency resonance frequencies are combined, and sound wave absorption of low-frequency broadband is achieved.
The noise elimination device for the explosion equipment has the multi-frequency broadband noise elimination characteristic, effectively reduces noise generated by high-temperature impact sound waves generated by the explosion equipment or an explosion experimental device, and reduces damage to a human body and a hearing system caused by the impact sound waves.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A muffling device for explosive equipment, comprising:
a housing including a first end portion, a body portion, and a second end portion, the first end portion, the body portion, and the second end portion being an integral structure, the body portion being disposed between the first end portion and the second end portion;
the metal micro-perforated plate is arranged in the shell and positioned between the first end part and the second end part, and a first cavity is formed between the metal micro-perforated plate and the main body part;
an acoustic metamaterial membrane disposed within the first cavity; and
a mass plate attached to the acoustic metamaterial membrane.
2. The muffling device for an explosive apparatus of claim 1, further comprising a layer of porous material disposed between the metal microperforated panel and the acoustic metamaterial membrane, the layer of porous material attached to the metal microperforated panel.
3. The muffling device for explosive equipment according to claim 1 or 2, wherein the first cavity is partitioned into at least two back cavities between the acoustic metamaterial film and the main body portion in an axial direction of the main body portion, and a height-adjustable magnet is disposed in each back cavity along a circumferential direction of the housing.
4. A muffling device for use in an explosive apparatus according to claim 3, wherein the first cavity is partitioned into at least two back cavities by a metallic material.
5. A sound-damping arrangement for explosive devices according to claim 3, characterised in that a plurality of height-adjustable magnets are arranged discretely in each back chamber along the circumference of the housing.
6. A sound-damping arrangement for explosive devices according to claim 3, characterised in that a plurality of height-adjustable magnets are arranged in each back chamber in succession along the circumference of the housing.
7. The muffling device for an explosive apparatus according to claim 2, wherein the pore size of the porous material layer and the pore size of the metal microperforated sheet are not exactly the same.
8. The muffling device for an explosive apparatus according to claim 3, wherein at least two sets of mass plates are arranged in the axial direction of the housing, and the plurality of mass plates in each set are separately arranged in the circumferential direction of the housing.
9. The muffling device for an explosive apparatus according to claim 3, wherein at least two sets of mass plates are arranged in the axial direction of the housing, and a plurality of mass plates in each set are arranged continuously in the circumferential direction of the housing.
10. A sound-damping arrangement for explosive devices according to claim 8 or 9, in which a set of mass plates corresponds to a back chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921073996.3U CN210692080U (en) | 2019-07-10 | 2019-07-10 | Silencing device for explosive equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921073996.3U CN210692080U (en) | 2019-07-10 | 2019-07-10 | Silencing device for explosive equipment |
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| CN210692080U true CN210692080U (en) | 2020-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
| CN110428801B (en) * | 2019-07-10 | 2024-06-04 | 北京石油化工学院 | Muffler device for explosive device |
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