JP2015031503A - Sound absorption plate unit, cell-shaped sound absorber including the same and sound absorption facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound absorption plate unit that reduces an unnecessary member to be a conventional sound absorption member to attain weight reduction and cost reduction, can easily perform position alignment in a case of being installed, and attains space saving when plural cell-shaped sound absorbers are conveyed.SOLUTION: By connecting four sound absorption plates 3 arranged in a line at three adjacent parts with rotatable connection members 5, the sound absorption plates can be arranged in one line, or can be folded with the two sound absorption plates as one pair. The sound absorption plate has an internal space filled with an absorption material 3b, and a part of the surface thereof is covered with an outer frame plate 3a.

Description

  The present invention relates to a silencer, and more particularly, to a cell-type silencer and a silencer equipment formed by using a silencer unit in which a plurality of silencers are connected.

  A silencer or a silencer is mainly installed in the middle of a flow path (for example, a duct or the like) of a ventilation facility or at an end thereof. This is to reduce noise generated from ventilation equipment such as a ventilation fan or mechanical equipment installed in a room to be ventilated. For example, in a mechanical facility such as a pump station, it is necessary to take measures to reduce the noise emitted from the ventilation duct. For this reason, a silencer duct lined with a sound absorbing material made of glass wool or the like is installed in the building as a ventilation duct. This building is designed in consideration of the installation space of the silencer duct so that the installed silencer duct does not hinder the loading, unloading, passing, operation and maintenance of various members.

  By the way, some silencers are called cell-type silencers. This constitutes a large silencer facility by combining a large number of cell silencers. Since the cell-type silencer can appropriately determine the number of silencers according to the flow rate of the gas to be passed, it can flexibly cope with various required specifications.

  The silencing performance of silencing equipment using cell silencers is determined by the shape of the basic cell silencer. Even when many cell silencers are installed side by side, each cell silencer is the same. Silence performance can be demonstrated. In addition, the pressure loss when the gas passes is determined by the basic shape of the cell-type silencer, so that it is easy to design for the required specifications.

  By the way, the conventional silencing equipment has constituted the whole by combining a plurality of cylindrical sound absorbing members (sound absorbing cells) each having a flow path so that the flow rate of the gas to be passed is substantially constant. For this reason, in the case of the silencer equipment in which many sound absorbing members are combined, the internal flow path becomes a dead space, and a large installation space is required as a whole. On the other hand, in order to reduce the construction cost and the amount of materials of the building, it is required to reduce the size of the building, and it is also necessary to reduce the installation space for the sound deadening duct in the building.

  In order to satisfy the conflicting demands as described above, a foldable cell-type silencer and a silencer equipped with the same have been proposed (see Patent Document 1). This silencer is usually installed in such a manner that the cell silencer overhangs the passage. On the other hand, the cell-type silencer is folded for maintenance or the like so that it does not overhang on the traffic path.

  In addition, an example is also disclosed in which a plurality of sound absorbing cells each having a sound absorbing surface on an internal passage and an external surface are combined to form a silencer facility in which a large number of passages are formed (see Patent Document 2). In the sound deadening equipment, a large number of sound absorbing cells are arranged at intervals, and a passage is formed not only between the internal passages but also between two adjacent sound absorbing cells.

  Furthermore, an invention is also disclosed that facilitates the alignment of each silencer in the length direction when a plurality of silencers are connected and installed in the middle of a duct (see Patent Document 3).

Japanese Patent No. 3916903 Japanese Utility Model Publication No.59-160807 JP 2000-8847

  However, the conventional cell silencer has the following problems. For example, as shown in FIG. 3 of Patent Document 1, in a silencer using a conventional cell-type silencer, the basic cell-type silencers are arranged adjacent to each other. For this reason, adjacent cell-type silencers have two sound-absorbing walls that constitute each outer plate. However, depending on the required noise reduction performance, it is not always necessary to have two sound absorbing walls. For this reason, there is a problem that the member for the outer plate is used more than necessary, and the mass of the member for the outer plate is increased correspondingly, and the material cost is also increased. In addition, the larger the mass, the lower the transportability, and there is also a problem that the work efficiency at the time of manufacturing at the factory and at the time of installation at the site decreases.

  Moreover, in the case of the cylindrical cell-type silencer according to Patent Document 2, there is a wide space for gas to pass through. For this reason, when a large number of sound absorbing members are stacked and transported, or when they are manufactured or stored at the factory, or when temporarily installed at the installation site of the silencer, the wide space including the gas flow path is included. Requires space. For this reason, the problem that transportability and workability fell occurred.

  Furthermore, in the case of the silencer connection structure according to Patent Document 3, it is difficult to arrange and construct the cell-type silencer in a grid pattern. For this reason, there has been a problem that a large number of work steps are required for alignment in the cross-sectional direction (see FIG. 11).

  An object of the present invention is to eliminate unnecessary members when a plurality of cell-type silencers are combined, and to realize weight reduction and cost reduction. Another object of the present invention is to provide a muffler that can easily perform positioning when a large number of cell-type mufflers are installed and constructed. Furthermore, one of the purposes is to realize space saving when a plurality of cell-type silencers are stacked and transported.

  In view of the above-mentioned object, the first means is a silencer unit comprising four silencers arranged in a row and a connecting member that connects the silencers at three adjacent portions. is there. By adopting the configuration as described above, the silencers can be arranged in a line, or the two silencers can be folded as a set.

  The second means is the silencer unit of the first means, wherein the silencer has an internal space and part of the surface is covered with an outer frame plate. By adopting the configuration as described above, it is possible to considerably prevent the outer frame plates from overlapping even if the cell-type silencers assembled in a cylindrical shape are adjacent to each other.

  The third means is the silencer unit of the first or second means, in which at least a part of the internal space of the silencer is filled with a sound absorbing material. By adopting the above configuration, it is possible to mute more efficiently than a simple hollow muffler.

  A fourth means is the noise reduction plate unit of the second or third means, wherein the connecting member is provided on one side or the other side in the thickness direction of the noise reduction plate. By adopting the above-described configuration, the cell silencer can be configured by rotating the silencer toward either side of the silencer in the thickness direction.

  A fifth means is the muffler plate unit of any one of the first to fourth means, wherein the connecting member is a rotation mechanism by a pin or a hinge. By adopting the configuration as described above, the silencers can be smoothly rotated with a simple structure.

  The sixth means is a cell-type silencer configured in a cylindrical shape using the silencer unit of any one of the first to fifth means. By adopting the above-described configuration, it is possible to configure a hollow quadrangular columnar silencer simply by rotating the silencers.

  The seventh means is a silencer facility in which the cell-type silencers of at least two sixth means are alternately arranged. By adopting the configuration as described above, it is possible to configure a silencer facility having a large cross-sectional area with a small number of cell-type silencers.

  The eighth means is the silencer of the seventh means, comprising a fixing member for fixing the position of the cell-type silencer adjacent to the cell-type silencer adjacent to each other. By adopting the configuration as described above, a reference for installing the cell type silencer is defined, and deviation from an appropriate position when the cell type silencer is installed can be suppressed.

  A ninth means is the silencing equipment of the eighth means, wherein the fixing member is at least one of a quadrangular columnar member, a cross-sectional X-shaped plate member, a quadrangular columnar member and a bar-shaped member, or a plate-shaped member. is there. By adopting the configuration as described above, the positioning of the cell-type silencer can be facilitated, and at the same time, interference with the connecting member can be avoided.

  The tenth means is a silencing equipment of the eighth or ninth means, which is disposed at an end of the fixing member and includes a stopper for fixing the position of the cell silencer in the gas flow path direction. is there. By adopting the above configuration, it is possible to align the positions of the cell-type silencers in the length direction.

  The eleventh means is the muffler of any of the eighth to tenth means, which is provided with a packing disposed in the adjacent portion and sealing a space formed in the adjacent portion. By adopting the configuration as described above, sound leakage can be prevented by packing even if sound is transmitted from the space. Moreover, since a part of packing hides the said adjacent part, it is possible to hide the arrangement | sequence shift of a cell type silencer.

  A twelfth means is a construction method for constructing the silencing equipment according to any of the ninth to eleventh means, wherein the fixing member is erected at a place where the silencing equipment is installed, It is the construction method of the silencing equipment which arrange | positions the said cell type silencer so that the said fixing member may be located in the dent of a corner | angular part. By adopting the above configuration, positioning when installing the cell-type silencer is facilitated.

It is a figure which shows the silencer unit which concerns on one Embodiment of this invention, FIG. 1 (A) shows the state in which each silencer was located in series, FIG.1 (B) was folded two by 2 silencers. FIG. 1C shows a cell-type silencer that is formed in a hollow quadrangular prism shape by the silencer unit. It is a figure which shows the silencing equipment which has arrange | positioned the cell-type silencer disclosed by FIG.1 (C) by turns, FIG.2 (A) shows a top view, FIG.2 (B) shows a front view. FIG. 3A is a view showing a modification of the cell-type silencer, FIG. 3A shows the cell-type silencer disclosed in FIG. 1C, FIG. 3B shows a horizontally long cell-type silencer, 3 (C) shows a vertically long cell-type silencer, and FIG. 3 (D) shows a cell-type silencer in which left and right silencers are inverted with respect to the cell-type silencer of FIG. 3 (B). It is a perspective view of a cell type silencer. It is a perspective view which shows the silencer which has arrange | positioned two cell-type silencers disclosed in FIG. 4, and a fixing member. 6A and 6B are perspective views showing a modified example of the fixing member, FIG. 6A is a quadrangular columnar member disclosed in FIG. 5, and FIG. 6 (C) is a member combining a quadrangular column and a rod-like member, and FIG. 6 (D) is a simple plate-like member. FIG. 7A is a plan view, FIG. 7B is a front view, and FIG. 7C is a bottom view, showing a stopper for fixing the longitudinal position of the cell silencer. . It is a figure which shows a part of silencing equipment using the stopper disclosed in FIG. 7, FIG. 8 (A) shows a top view, and FIG. 8 (B) shows a front view. FIG. 9A is a plan view, FIG. 9B is a front view, and FIG. 9C is a plan view showing a packing for sealing a space formed in an adjacent portion of the cell silencer. It is a bottom view. It is a figure which shows a part of silencer using the packing disclosed in FIG. 9, FIG.10 (A) is a top view, FIG.10 (B) is a front view. It is a photograph which shows the construction condition of the conventional silencer, FIG. 11 (A) shows the state in the middle of construction, and FIG. 11 (B) shows the state in which the first-stage cell silencer was installed.

  Next, an embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments described below are merely examples of the present invention, and the technical scope of the present invention is not limited to the specific examples described in the embodiments. Moreover, each component demonstrated below can comprise this invention individually or in arbitrary combinations.

  FIG. 1 shows a front view of a foldable silencer unit 1 for constituting the cell silencer of this embodiment. In the silencer unit 1, four silencer plates 3 are arranged in a row, and the silencer plates 3 are connected by three connecting members 5 at three adjacent portions. The connecting member 5 is a rotation mechanism using a pin or a hinge. However, it is not limited to a pin or a hinge as long as the adjacent silencer plate 3 can be rotatably connected. In FIG. 1, the silencer 3 has a predetermined length in a direction (a direction perpendicular to the paper surface) orthogonal to both the width direction and the thickness direction.

  The sound deadening plate 3 includes an outer frame plate 3a having a U-shaped cross section, and has a predetermined internal space. For this reason, for example, in the muffler 3 at the left end in FIG. 1A, the upper surface is open. The outer frame plate 3a is made of a metal plate such as steel, stainless steel, or aluminum, or in some cases a resin plate. The outer frame plate 3a may be formed with a large number of openings in order to enhance the silencing effect.

  The interior space of the sound deadening plate 1 is filled with a sound absorbing material 3b such as glass wool. In the present embodiment, the sound absorbing material 3b is filled in almost the entire internal space, but the sound absorbing material 3b may be filled only in a part of the internal space.

As described above, the silencer unit 1 of the present embodiment includes the four silencers 3. These silencer plates 3 are arranged in series and connected by three connecting members 5. For this reason, as shown in FIG. 1 (A), all the silencers 3 may be arranged in a line, or as shown in FIG. 1 (B), they are folded at the connecting member 5 at the center in the width direction. And the width can be halved. This means that the width of the silencer unit 1 can be changed in accordance with the storage location, the size of the truck bed, and the like. That is, when a large area is provided for the silencer unit 1, it can be in a straight line state as shown in FIG. 1A, but when only a small area is provided, FIG. As shown in (B), the width of the silencer unit 1 is halved.

  FIG. 1C is a view showing a state where the silencer unit 1 is assembled as a cell-type silencer 11. As shown in FIG. 1C, a hollow square column-shaped cell silencer 11 is formed by four silencers 3. In the cell-type silencer 11, a rectangular inner space serves as a gas flow path 13. Here, as for the square inner surface which comprises the gas flow path 13, the surface where the sound-absorbing material 3b is exposed, and the surface of the outer frame board 3a are arrange | positioned alternately. This is because the direction of the muffler 1 is alternately switched as shown in FIG. Specifically, in FIG. 1C, the sound absorbing material 3 b faces the gas flow path 13 in the upper and lower sound deadening plates, and the outer frame board 3 a faces the gas flow path 13 in the left and right sound deadening plates. .

  FIG. 2 shows a silencer 21 in which a number of cell-type silencers 11 are installed. FIG. 1 (A) is a plan view and FIG. 1 (B) is a front view. As shown in FIG. 2A, in the silencer 21, the cell-type silencers 11 are arranged in a staggered manner (as in a checkered pattern). Since the wall which partitions the gas flow path 13 is comprised by the one outer frame board 3a, the outer frame board 3a does not overlap twice.

  Moreover, in this embodiment, the columnar member 15 as a fixing member is installed between the corners of each cell-type silencer 11. As shown in FIG. 2B, the columnar member 15 is erected along the vertical direction, and its lowermost end is fixed to the surrounding structure 17. The silencer 21 in FIG. 2B has a structure in which the cell silencer 11 is provided in two stages in the vertical direction. This figure shows a state in which the second-stage cell-type silencer 11 is installed. However, the presence of the columnar member 15 makes it possible to accurately position the second-stage cell-type silencer 11. It becomes possible. Further, even after the cell silencer 11 is installed, the columnar member 15 restricts the movement of the cell silencer 11 in the horizontal direction. The outer frame plate facing the columnar member 15 can also have a sound absorbing function.

  Next, a modified example of the cell silencer will be described with reference to FIG. FIG. 3A is the cell-type silencer 11 shown in FIG. On the other hand, the cell-type silencer 11b of FIG. 3B shows an example in which the width of the upper and lower silencers is wider than the width of the left and right silencers. That is, this is a case where the cross-sectional shape of the gas flow path 13b is a rectangle that is long in the left-right direction. The other configuration is the same as that of the cell-type silencer 11 in FIG. The cell type silencer 11c of FIG. 3C shows an example in which the width of the left and right silencers is wider than the width of the upper and lower silencers. That is, this is a case where the cross-sectional shape of the gas flow path 13c is a rectangle that is long in the vertical direction. Further, the cell silencer 11d shown in FIG. 3 (D) has the same basic configuration as the cell silencer 11 shown in FIG. 3 (A), but the sound absorbing material 3b of the left and right silencers is a gas flow. The difference is that it faces the road 13d. That is, all four surfaces of the gas channel 13d are formed by the sound absorbing material 13b.

  FIG. 4 is a perspective view for helping understanding of the overall shape of the cell-type silencer 11e. The cell-type silencer 11e in this figure is an example in which the gas channel 13e has a square cross-sectional shape, two opposing surfaces of the gas channel 13e are sound absorbing materials, and the two opposing surfaces are outer frame plates. . As shown in this figure, the cell-type silencer 13e has a hollow quadrangular prism shape as a whole, but has recesses 19 formed at four corners. The above-mentioned columnar member 15 is positioned in the recess 19. The length of the cell-type silencer 11e in the direction along the gas flow path 13e is an example, and is not particularly limited. Depending on the situation of the installation location, it is possible to adopt a long or short one.

Further, as shown in FIG. 4, the sound deadening plates 3 are rotatably connected by a connecting member 5. For this reason, even after the cell-type silencer 11e is once assembled, it can be folded again and deformed so that the silencer plate 3 is in a line. By carrying out like this, if the case where it conveys for a maintenance etc., for example after using the cell-type silencer 11e, for example, it can respond flexibly to the magnitude | size of the loading platform of a conveyance tool (truck etc.).

  FIG. 5 is a perspective view in which cell type silencers 11e1 and 11e2 similar to those disclosed in FIG. 4 are combined. In particular, the cell silencers 11e1 and 11e2 are arranged in such a manner that the gas flow path 13e faces the horizontal direction. The first cell silencer 11e1 and the second cell silencer 11e2 are arranged obliquely to each other, and a gas flow path 13e is formed by the silencer plate 3e of the adjacent cell silencer (not shown). ing.

  A square space with a small cross section is formed in the vicinity of the first cell silencer 11e1 and the second cell silencer 11e2, and a columnar member 15 having a square cross section is inserted into this space. ing. The columnar member 15 itself cannot be fixed to the surrounding structure, but has a function of preventing the cell-type silencers 11e1 and 11e2 from being displaced from the installation position. For this reason, there is an advantage of using the columnar member 15 even in the installation mode in which the gas flow path 13e is in the horizontal direction. In FIG. 5, only the minimum cell-type silencers 11e1 and 11e2 of the silencer 21e are shown. In an actual silencer, a larger number of cell-type silencers are combined.

  FIG. 6 shows the above-described columnar member 15 (FIG. 6A) and a jig used in place of the columnar member 15. FIG. 6B shows a jig for the fixing member 15b made of a plate-like member having an X-shaped cross section. Even the fixing member 15b having such a structure exhibits the same function as that of the columnar member 15 of FIG. FIG. 6C shows a jig composed of a combination 15c of a plurality of columnar members and thin rod-shaped members. In addition to the function as a columnar member, this jig also has a function of avoiding the connecting member. That is, columnar members are provided at both ends and the center of the jig. For this reason, similarly to the columnar member 15 in FIG. 6A, it is possible to prevent positional deviation between the adjacent cell silencers. On the other hand, each columnar member is connected by a thin rod-shaped member. For this reason, a predetermined space is formed in the region where the bar-shaped member exists. By matching this space with the position of the connecting member 5e that connects the sound deadening plate, interference between the combined body 15c and the connecting member 5e can be avoided. Further, FIG. 6D shows a jig made of a simple plate member 15d. Even with such a plate-shaped member 15d, the positional relationship between the cell-type silencers can be fixed, and may function in the same manner as the columnar member 15 disclosed in FIG.

  Next, the stopper 31 will be described with reference to FIG. This stopper 31 is for fixing the position of the cell-type silencer in the length direction (gas flow path direction). The stopper 31 includes a cap portion 33 that is fitted to the upper end portion of the columnar member, an arm 35 that is obliquely fixed to the upper surface of the cap portion 33, and claw portions 37 that are provided on the lower surfaces of both ends of the arm 35. And. The cap portion 33 is formed with a recess for fitting the upper end of the columnar member.

  A mode in which the cell-type silencer 11 is actually fixed is shown in FIG. FIG. 8A shows a plan view, and FIG. 8B shows a side view. As can be seen from FIG. 8A, the stopper 31 is disposed in the vicinity of the two cell silencers 11. That is, a columnar member (not shown) is installed in the vicinity of the two cell-type silencers 11, and the cap portion 33 is fitted to the upper end of the columnar member. Thus, the two claw portions 37 enter the gas flow path 13 of each cell silencer 11 and align the positions of the cell silencers 11 in the length direction.

Next, the packing 41 will be described with reference to FIG. This packing 41 is for sealing the space formed in the adjacent part of two adjacent cell type silencers, and preventing sound leakage from this space. As a specific structure, a packing main body 43 having a square planar shape and two or more protrusions 45 provided at diagonal positions on the lower surface thereof are formed. The packing 41 is made of an elastic material such as rubber. This is because it is possible to prevent sound leakage from the gap between the columnar member and the cell-type silencer when selecting the one that can be flexibly adhered to the silencer. A specific mounting mode is shown in FIG. As shown in FIG. 10, the packing 41 is disposed in the vicinity of the two cell silencers 11, and two or more protrusions 45 enter the gas flow path 13 of each cell silencer 11, and the two cells. A space formed in the vicinity of the shape silencer 11 is sealed. Sealing here does not require strictness to airtightness, and it is sufficient that at least sound leakage from the space can be suppressed to a considerable extent. For this reason, after installing the packing 41, there may be a slight gap between the upper surface of the cell-type silencer 11 and the packing. As described above, the stopper 31 and the packing 41 are common in that they are attached to the upper end portion of the columnar member. However, the stopper 31 fastens the two cell type silencers 11 together, and the packing 41 fills the gap formed between the cell type silencers. Therefore, the number of claws of the stopper 31 is two in principle, but the number of protrusions of the packing 41 is not limited to two, and may be three or four.

  It can be used for a silencer or a silencer installed in a gas flow path such as a duct.

DESCRIPTION OF SYMBOLS 1 Silencer board unit 3 Silencer board 3a Outer frame board 3b Sound absorption material 5 Connection member 11 Cell type silencer 13 Gas flow path 15 Fixing member (columnar member)
17 Surrounding structure 19 Recess 21 Silencer 31 Stopper 41 Packing

Claims (12)

  A silencer unit comprising four silencers arranged in a row and a connecting member that connects the silencers at three adjacent portions.   The silencer unit according to claim 1, wherein the silencer has an internal space and part of the surface is covered with an outer frame plate.   The silencer unit according to claim 1 or 2, wherein a sound absorbing material is filled in at least a part of the internal space of the silencer.   The silencer unit according to claim 2 or 3, wherein the connecting member is provided on one side or the other side in the thickness direction of the silencer.   The silencer unit according to any one of claims 1 to 4, wherein the connecting member is a rotation mechanism using a pin or a hinge.   A cell-type silencer configured in a tubular shape using the silencer unit according to any one of claims 1 to 5.   A silencing equipment in which at least two cell-type silencers according to claim 6 are arranged alternately.   The silencer of Claim 7 provided with the fixing member for fixing the position of the said cell type silencer to the adjacent part of the said cell type silencer adjacent to each other.   The silencer according to claim 8, wherein the fixing member is at least one of a quadrangular columnar member, a plate member having an X-shaped cross section, a quadrangular columnar member and a connecting rod, or a plate-shaped member.   The silencer according to claim 8 or 9, further comprising a stopper that is disposed at an end of the fixing member and fixes a position of the cell silencer in a gas flow path direction.   The silencer according to any one of claims 8 to 10, further comprising a packing disposed in the adjacent portion and sealing a space formed in the adjacent portion. A construction method for constructing the silencing equipment according to any one of claims 9 to 11,
The fixing member is erected at the installation site of the silencer,
The construction method of the silencing equipment which arrange | positions the said cell type silencer so that the said fixing member may be located in the recessed part of the corner | angular part of the said cell type silencer.