JP4261431B2 - Silencing element connection structure - Google Patents

Description

  The present invention relates to a silencer that silences fluid noise generated from a blower or the like, and more particularly to a connection structure of silencer elements that mutually fix a plurality of circular silencers constituting the silencer.

  2. Description of the Related Art Conventionally, in a ventilation facility such as a subway or a tunnel or a blower facility in a plant, a silencer for silencing fluid noise generated from these facilities has been installed. In such a silencer, the silencer elements whose longitudinal sections are rectangular or round and open at both ends are arranged adjacent to each other so as to extend in the horizontal direction.

  As an example of such a conventional silencing device, nine silencing elements, three in the horizontal direction and three in the vertical direction, are adjacent to each other in a single ventilation hole of the casing forming the air flow path of the air duct. Some of them are arranged, and these nine silencer elements divide the air flow path.

  The casing is formed in a rectangular tube shape in which each silencing element can be incorporated, and an air inlet is provided at one end and an air outlet is provided at the other end.

  Each silencing element has a cylindrical pipe formed of inorganic fibers such as glass, and the front and back surfaces of the cylindrical pipe have a breathable material, for example, inorganic fibers such as glass, organic fibers, It is covered with a cylindrical scattering prevention material made of glass cloth or nonwoven fabric. Each end face of each silencing element is coated with a scattering preventive agent such as neoprene to prevent scattering of inorganic fibers as a scattering preventing material.

  Each of the incorporated silencing elements forms an air flow path having a circular cross section at the center, but separately from the circular air flow path, between each silencing element and the corner of the casing. A star-shaped air flow path having three corners in which one corner is a right angle is formed. In addition, a star-shaped air flow path having one flat side surface and three corners is formed between each silencing element and the side surface of the casing. In addition, a star-shaped air flow path having four corners is formed in a space surrounded by the four silencing elements.

  In this way, nine silencer elements are arranged adjacent to each other in the rectangular tube casing, and air flow paths are formed inside and outside each of the incorporated silencer elements, so that the inside of the square tube casing is finely partitioned. Will be.

  With such a configuration, noise that has propagated through the air flow paths is absorbed by the divided anti-scattering materials (see, for example, Patent Document 1).

  In addition, in the conventional silencer, it is common to arrange a grid that supports both end faces of each silencer element in order to prevent each silencer element from moving in the longitudinal direction or falling off. It was the target.

JP 2002-266756 A

  However, in the conventional silencer, if irregularities occur on the plane of the grating that supports the round silencer element, a gap is partially created between the silencer element and the grating, and this gap causes the silencer element to extend in the longitudinal direction. It becomes easy to move, and there is a possibility that the silencing elements may rattle due to the force of the fluid passing through the silencing device, or the arrangement of the silencing elements may become uneven. Therefore, in the silencer in which the silencer elements are stacked over several stages, when the longitudinal silence of the silencer element located in the upper stage occurs, the end plate of the silencer element located in the upper stage is located in the lower stage. The sound deadening element may be placed on the perforated plate, and the sound deadening element located in the lower stage may be damaged.

  Further, if the positions of the silencer elements are not uniform in the silencer, the flow of fluid passing through the silencer is disturbed, and the air resistance is increased.

  Furthermore, the lattice provided in the silencer supports each silencer element so that positional displacement does not occur. However, since the silencer elements are not fixed to each other, the fluid passing through the silencer element is not supported. When the flow is changed, particularly when the flow is swirled, the silencer elements vibrate or rotate, and the adjacent silencer elements rub against each other and wear and may be damaged.

  From the above points, a high processing accuracy is required for the lattice disposed in the silencer, and high accuracy is also required when assembling the silencer. For this reason, the processing and assembling of the lattice requires advanced processing technology and assembling technology, and high cost is required.

  Accordingly, the present invention provides a silencer configured by arranging a plurality of round-shaped silencer elements adjacent to each other, and prevents the displacement of the adjacent silencer elements in the longitudinal direction and the circumferential direction. An object of the present invention is to provide a muffler element connecting structure capable of maintaining and preventing damage to the muffler element.

In order to achieve the above-mentioned object, the connection structure of the silencer elements of the present invention according to claim 1 is characterized in that a plurality of silencer elements each having a round cross section with both ends open are arranged adjacently in a stacked state, In the connection structure of the silencing elements in the silencing device in the silencing device for silencing the fluid that has passed through each silencing element by the sound absorbing material disposed in each silencing element, each end of each pair of silencing elements that are stacked and adjacent to each other A contact surface having a shape that contacts the outer peripheral surface of each end portion of each of the muffler elements is formed on the front surface and the back surface, and at least one of the front surface and the back surface on either surface , the other at least two protrusions disposed connecting member are projected in a plane, the the outer circumferential surface of each end of the silencing elements of each pair have respective connecting members sandwiching Lies in the projection of the serial connecting member has a recess to be inserted.

  And by adopting such a configuration, each end of each pair of silencer elements adjacent in the vertical direction is connected by a connecting member, so that each pair of silencer elements adjacent in the vertical direction is connected to each other. Misalignment can be prevented.

  According to a second aspect of the present invention, the connection structure of the silencer element of the present invention is characterized in that, in the first aspect, the connection member is interposed between the ends of each pair of the silencer elements disposed adjacent to each other in the horizontal direction. In addition, a recess is formed on the outer peripheral surface of each end portion of each pair of silencer elements that sandwich the respective connecting members in the horizontal direction, and the projections of the connecting members are inserted therein.

  And by adopting such a configuration, each end of each pair of muffler elements adjacent in the horizontal direction is connected by a connecting member, so each one adjacent in the horizontal direction as well as the vertical direction. Misalignment of the pair of muffler elements can also be prevented.

The connection structure of the silencer elements of the present invention according to claim 3 is characterized in that a plurality of silencer elements each having a round cross section open at both ends are arranged adjacent to each other in the stacked state and in the axial direction. In the silencer connection structure in the silencer for silencing the fluid that has passed through each silencer element by means of the sound absorbing material disposed between the two silencer elements that are stacked and interposed between the ends of each pair of adjacent silencer elements. A contact surface having a shape that contacts the outer peripheral surface of each end of each of the muffler elements is formed on the front surface and the back surface, and at least one of the front surface and the back surface on one surface and at least on the other surface with two projections are arranged a first coupling member are projected, the silencer elements of each two adjacent pair are adjacent to the stacking state and axially Respectively interposed between the parts, it is formed the contact surface shaped to contact the outer peripheral surface of each end of each silencer element on the front and back surfaces, the front and back surfaces, at least one in one side, A second connecting member having at least two protrusions protruding in two rows on the other surface is disposed, and each end of each pair or two pairs of silencer elements sandwiching each connecting member is arranged. A recess is formed on the outer peripheral surface into which the projection of the connecting member is inserted.

  By adopting such a configuration, the ends of the plurality of muffler elements adjacent to each other in the vertical direction and the axial direction are connected by a connecting member. It is possible to prevent the displacement of the silencer element.

  According to a fourth aspect of the present invention, the silencer coupling structure of the present invention is characterized in that, in the third aspect, the first coupling members are interposed between the respective ends of the pair of silencer elements arranged adjacent to each other in the horizontal direction. The second connecting member is interposed between the ends of each of the two pairs of muffler elements that are disposed adjacent to each other in the horizontal direction and the axial direction, and the connecting members are sandwiched in the horizontal direction. A recess is formed in the outer peripheral surface of each end of each pair or two pairs of muffler elements, into which the projection of the connecting member is inserted.

  By adopting such a configuration, the ends of the plurality of muffler elements adjacent in the vertical direction, the axial direction, and the horizontal direction are connected by a connecting member, so that the vertical direction, the axial direction, and the horizontal direction It is possible to prevent positional deviation of a plurality of muffler elements adjacent to.

  The connection structure of the silencer element of the present invention according to claim 5 is characterized in that, in any one of claims 1 to 4, the protrusion of the connection member is a metal rod provided with a head, and each metal rod The head is positioned in the groove so as not to protrude from the front surface or the back surface.

  And by employ | adopting such a structure, since the head of each metal rod does not protrude from the surface or back surface of a connection member, a connection member and each muffler element can be stuck.

  According to the connection structure of the circular silencing elements of the present invention, each circular silencing element can be firmly fixed without disposing a grid that supports a plurality of adjacently arranged circular silencing elements. For this reason, it is not necessary to create a lattice, and the cost can be greatly reduced, and the circular silencing element can be prevented from being damaged due to the positional displacement or rotation of the adjacent silencing elements. .

  Hereinafter, embodiments of the connection structure of the silencer element according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the silencing element 1 formed in a round shape in the present embodiment has a substantially donut shape made of a steel plate such as an aluminum alloy or stainless steel, a side plate 2 formed in a bell mouth shape, and a donut shape. The side plates 3 are opposed to each other, and the inner and outer cylindrical portions 2a and 3a and the outer cylindrical portions project in the opposing direction of the side plates 2 and 3, respectively. 2b and 3b are formed.

  Between the side plates 2 and 3, a long porous inner cylinder 4 and a porous outer cylinder 5 formed of a steel plate such as an aluminum alloy or stainless steel and having a large number of through holes (not shown) are supported. Between the porous inner cylinder 4 and the porous outer cylinder 5, a sound absorbing material 6 formed by compressing glass wool or polyester fiber is filled, and the surface of the sound absorbing material 6 is filled. Is coated with a non-woven fabric 7 made of polyester fiber with good air permeability for preventing scattering of fibers of the sound absorbing material 6 and preventing moisture or oil from penetrating into the sound absorbing material 6.

  Further, in the present embodiment, the outer cylindrical portions 2b and 3b of the side plates 2 and 3 are spaced apart from each other in the circumferential direction between the outer peripheral surface facing upward in the vertical direction and the outer peripheral surface facing left in the horizontal direction. Two through holes 8 are formed. On the other hand, one through-hole 9 is formed in each of the outer cylindrical surfaces 2b and 3b of the side plates 2 and 3 on the outer peripheral surface facing downward in the vertical direction and the outer peripheral surface facing right in the horizontal direction.

  Next, the connecting member 10 of the first embodiment is composed of a piece 11 formed of a metal or hard rubber or the like in a substantially rectangular shape when viewed from above. As shown in FIG. 2, on the surface 10 a of the connecting member 10, the outer peripheral surfaces at both ends of the pair of muffler elements 1 arranged adjacent to each other, that is, side plates 2 positioned at both ends of the muffler element 1 are disposed. The circular arc surface 12 which is a contact surface in contact with the outer peripheral surface of the outer cylindrical portion 2b, 3b is formed in almost the entire region. Moreover, the outer periphery of the outer cylindrical portions 2b and 3b of the other silencing elements 1 is provided at both ends in the longitudinal direction of the back surface 10b of the connecting member 10 which is the back side of the front surface 10a on which the circular arc surface 12 is formed. Contact protrusions 13a and 13b are formed so that the contact surfaces that contact the surface are arcuate surfaces.

  The piece 11 has through-holes 14a, 14b, and 14c at central positions in a total of three positions in the width direction, that is, a center in the longitudinal direction and an intermediate portion that is spaced from the center in both directions in the longitudinal direction. Is formed. In the present embodiment, a groove 15a is formed on the outer periphery of the central through hole 14a on the front surface 10a, and grooves 15b and 15c are formed on the outer periphery of the other through holes 14b and 14c on the rear surface 10b. ing.

  Next, the operation of the silencer coupling structure of the first embodiment will be described using the silencer element 1 and the coupling member 10 described above. In the first embodiment, the silencer 16 has a quadrangular frame 18 formed by four flat plates 17 as shown in FIGS. In this frame 18, a total of 16 silencing elements 1 in four rows in the horizontal direction and four stages in the vertical direction are arranged, and each silencing element 1 is fixed to each other by a total of 56 connecting members 10. Yes. Each circular silencing element 1 has a side plate 2 formed in a bell mouth shape so as to be positioned in front of the silencing device 16, and the side plate formed in the bell mouth shape of each silencing element 1. By disposing 2 in front, the air resistance of the fluid flowing into the silencer 16 can be reduced.

  As an example of a method of assembling the silencer 16, first, two flat plates 17 are assembled into an L shape, and eight connecting members 10 for fixing the four silencer elements 1 to the flat plate 17 serving as a bottom plate are provided. Sixteen holes (not shown) to be fixed are formed in accordance with the positions of the outer cylindrical portions 2b and 3b of the side plates 2 and 3 of the silencer elements 1, respectively.

  Then, eight connecting members 10 each having a metal rod 19 as an example of a protrusion fitted into the through hole 14a from the front surface 10a side to the flat plate 17 serving as a bottom plate are connected to the through holes 14b from the back surface 10b side of each connecting member 10. 14c and the flat plate 17 serving as the bottom plate are fixed by inserting metal rods 19 into holes (not shown) corresponding to the through holes 14b and 14c.

  Next, each of the connecting members 10 fitted from the surface 10a side of each connecting member 10 is fixed on each connecting member 10 on the lower left side of the figure fixed to the flat plate 17 which is the bottom plate of the two flat plates 17 assembled in an L shape. The silencer element 1 is fixed by inserting the metal rod 19 through the through holes 9 formed in the outer cylindrical portions 2b and 3b of the side plates 2 and 3, respectively.

  Then, on the upper surface in the vertical direction of the outer cylindrical portion 2b, 3b of each side plate 2, 3 of each silencing element 1 fixed to the flat plate 17 serving as the bottom plate, a metal rod 19 is inserted into the through hole 14a from the surface 10a side. Is inserted into the through-holes 14b and 14c from the back surface 10b side of each connecting member 10 and the through holes formed in the outer cylindrical portions 2b and 3b of the silencing element 1. Each is fixed by being inserted into the hole 9.

  Next, the metal rod 19 fitted from the surface 10a side of each connecting member 10 is inserted into each through hole 9 formed in the outer cylindrical portion 2b, 3b of each side plate 2, 3, and the other silencing element 1 is inserted. Is repeated and this is sequentially repeated, thereby stacking the four stages of circular silencing elements 1 in the first row.

  Further, metal rods 19 are inserted into the through holes 14b and 14c from the back surface 10b side to the right in the horizontal direction of the outer cylindrical portions 2b and 3b of the side plates 2 and 3 of the respective circular silencing elements 1 stacked in the first row. Is formed on the right side in the horizontal direction of the outer cylindrical portions 2b and 3b of the side plates 2 and 3 of the muffler element 1 from the surface 10a side of the connecting member 10 to which the screw is fitted. The connecting member 10 is fixed by being inserted into each through hole 9.

  Then, on the right side of each silencing element 1 stacked in the first row in the horizontal direction, a metal rod 19 fitted in the through hole 14a of each connecting member 10 fixed to the flat plate 17 serving as a bottom plate, The metal rods 19 fitted to the connecting members 10 fixed to the right in the horizontal direction of the respective silencing elements 1 in the row are connected to the vertical portions of the outer cylindrical portion 2b of the side plate 2 and the outer cylindrical portion 3b of the side plate 3. The muffler element 1 is fixed by being inserted through a through hole 8 formed in the lower direction in the direction and two through holes 9 formed in the left direction in the horizontal direction.

  Further, similarly to the first row, the connecting members 10 are respectively disposed above the outer cylindrical portion 2b of the side plate 2 and the outer cylindrical portion 3b of the side plate 3 in the vertical direction, which are fixed to the flat plate 17 serving as the bottom plate. The metal rods 19 fixed and fitted in the through holes 14a of the connecting members 10 and the metals fitted to the connecting members 10 fixed to the right in the horizontal direction of the respective silencing elements 1 in the first row. The flange 19 is inserted into a through hole 8 formed in the vertical direction below the outer cylindrical portion 2b of the side plate 2 and the outer cylindrical portion 3b of the side plate 3 and two through holes 9 formed on the left side in the horizontal direction. Then, the silencing elements 1 are stacked, and similarly, the silencing elements 1 are stacked in four stages in the second row.

  Then, the round silencing elements 1 are stacked in four rows in the third and fourth rows by the same procedure, and then contact the right outer peripheral surface in the horizontal direction of each round silencing element 1 in the fourth row. The flat plate 17 in the vertical direction is erected and fixed on the flat plate 17 serving as the bottom plate, and the flat plate 17 serving as the top plate is horizontally fixed on the respective flat plates 17 serving as the both side frames to complete the silencer 16.

  According to the connection structure of the silencing elements of the first embodiment described above, each silencing element 1 is arranged adjacent to each other in the vertical direction and the horizontal direction, the outer cylindrical portion 2b of each side plate 2, and each side plate. 3 is firmly connected by the connecting members 10 fixed to the outer cylindrical portion 3b, and the muffler element 1 at the lowest stage is a bottom plate by the connecting members 10 fixed to the lower outer peripheral surface in the vertical direction. It is firmly fixed to the flat plate 17. For this reason, it is possible to prevent positional displacement and rotation in the axial direction of each silencing element 1, and the side plates 2, 3 of the silencing element 1 come into contact with the porous outer cylinder 5 of the other silencing element 1 adjacent to each other. It is possible to prevent the tube 5 from being damaged.

  Further, by connecting the silencing elements 1 to each other, there is no need to create a grid that supports the silencing elements 1 as in the prior art, and processing costs and assembly costs for creating the grid can be reduced. The cost required for creating 16 can be greatly reduced.

  Furthermore, by forming the grooves 5a, 15b, and 15c in each connecting member 10, it is possible to prevent the head of each metal rod 19 from protruding from each connecting member 10, and to provide a gap between the silencing elements 1. Therefore, the silencing effect of the silencing device 16 can be ensured.

  Next, the connecting member 20 of the second embodiment is formed of metal or hard rubber, and as shown in FIG. 6, the two connecting members 10 of the first embodiment described above are adjacent to each other in the width direction. It is comprised by the piece 21 made.

  As shown in FIG. 6, the connection member 20 has a surface 20 a adjacent to each other in the outer peripheral surfaces at both ends of the pair of muffler elements 1 arranged adjacent to each other in the axial direction, that is, in the pair of muffler elements 1. A circular arc surface 22 which is a contact surface in contact with both outer peripheral surfaces of the outer cylindrical portions 2b and 3b of the side plates 2 and 3 located at both end portions is formed over almost the entire region. Further, at both ends in the longitudinal direction of the back surface 20b of the connecting member 20 which is the back side of the front surface 20a on which the circular arc surface 22 is formed, the outer cylindrical portions 2b, Contact protrusions 23a and 23b are formed so that the contact surfaces that come into contact with both outer peripheral surfaces of 3b are formed as arcuate surfaces.

  The piece 21 has through holes 24 a, 24 b, 24 b, 24 b, 24 a, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24 b, 24c is formed. Therefore, each connection member 20 has a pair of through holes 24a, 24b, 24c formed in two rows.

  In this embodiment, a groove 25a is formed on the outer periphery of the central through hole 24a on the front surface 20a, and grooves 25b and 25c are formed on the outer periphery of the other through holes 24b and 24c on the back surface 20b. ing.

  Next, the operation of the connection structure of the circular silencer element according to the second embodiment will be described using the silencer element 1, the connection member 10, and the connection member 20 formed in the above-described round shape. In the second embodiment, as shown in FIGS. 7 to 9, the silencer 26 includes a rectangular frame 28 formed by four flat plates 27, and the silencer element 1 is horizontally disposed in the frame 28. A total of 32 rows of 4 rows, 2 rows in the longitudinal direction and 4 rows in the vertical direction are arranged, and each silencer element 1 is fixed by 56 connecting members 10 and 28 connecting members 20.

  As an example of a method for assembling the silencer 26, first, two flat plates 27 are assembled in an L shape, and each side plate 3 is arranged opposite to the flat plate 27 serving as a bottom plate and arranged in four rows in the horizontal direction. 32 holes (not shown) for fixing the eight connecting members 10 and the four connecting members 20 are formed in accordance with the positions of the side plates 2 and 3 of the silencing element 1.

  Next, on the connection member 10 and the connection member 20 on the lower left side of the figure fixed to the flat plate 27 that is the bottom plate of the two flat plates 27 assembled in an L shape, the surface 10a side of the connection member 10 and the connection The metal rod 19 fitted from the surface 20a side of the member 20 is inserted into the through holes 9 formed in the outer cylindrical portions 2b and 3b of the side plates 2 and 3, and the side plates 2 and 3 are opposed to each other in the longitudinal direction. The two muffler elements 1 arranged in this manner are fixed.

  Then, on the upper surface in the vertical direction of the outer cylindrical portions 2b and 3b of the side plates 2 and 3 of the two round silencing elements 1 fixed to the flat plate 27 serving as the bottom plate by the connecting member 10 and the connecting member 20, the surface 10a side From the back surface 10b side of the connecting member 10 in which the metal rod 19 is fitted into the through hole 14a, the metal rod 19 fitted in the through holes 14b and 14c is attached to the outer cylindrical portion 2b of each side plate 2 of each silencing element 1. It is inserted into each formed through hole 8 and is fitted into each pair of through holes 24b and 24c from the back surface 20b side of the connecting member 20 in which the metal rod 19 is fitted into the through hole 24a from the front surface 20a side. The metal rods 19 are fixed by being inserted through the through holes 8 formed in the outer cylindrical portion 3b of the side plates 3 of the respective silencing elements 1.

  Next, the metal rod 19 fitted from the surface 10a side of each connecting member 10 is inserted into each through hole 9 formed in the outer cylindrical portion 2b of each side plate 2 and fitted from the surface 20a side of the connecting member 20. Each attached metal rod 19 is inserted into each through hole 9 formed in the outer cylindrical portion 3b of each side plate 3 to fix the other two silencing elements 1, and this is repeated in order to obtain the first row. The four stages of silencer elements 1 are stacked.

  Then, a metal rod 19 is fitted into the through holes 14b and 14c from the back surface 10b side to the right in the horizontal direction of the outer cylindrical portion 2b of each side plate 2 of each silencing element 1 stacked in the first row. A metal rod 19 fitted into the through hole 14a is inserted from the surface 10a side of the member 10 into each through hole 9 formed on the right side in the horizontal direction of the outer cylindrical portion 2b of the side plate 2 of each circular silencing element 1. By doing so, each connecting member 10 is fixed.

  Further, a metal rod 19 is fitted to each through hole 24b, 24c from the back surface 20b side to the right in the horizontal direction of the outer cylindrical portion 3b of each side plate 3 of each circular silencing element 1 stacked in the first row. Each through hole formed on the right side in the horizontal direction of the outer cylindrical portion 3b of the side plate 3 of each circular silencing element 1 with the metal rod 19 fitted into each through hole 24a from the surface 20a side of the connected connecting member 20 Each connecting member 20 is fixed by being inserted into 9.

  Then, the respective silencing elements 1 stacked in the first row are respectively fitted to the through holes 14a of the connecting members 10 and the through holes 24a of the connecting members 20 fixed to the flat plate 17 serving as the bottom plate, respectively. The metal rods 19 attached and the silencing elements 1 in the first row are fitted into the through holes 14a of the connecting members 10 fixed to the right in the horizontal direction and the through holes 24a of the connecting members 20, respectively. Each metal rod 19 is connected to a through-hole 8 formed below in the vertical direction of the outer cylindrical portion 2b of each side plate 2 and the outer cylindrical portion 3b of each side plate 3, and two formed to the left in the horizontal direction. The two silencing elements 1 are fixed by being inserted into the through holes 9.

  Further, similarly to the first row, the connecting member 10 is fixed above the outer cylindrical portion 2b of each side plate 2 of each silencing element 1 fixed to the flat plate 17 serving as a bottom plate, and the outside of each side plate 3 is fixed. The connecting member 20 is fixed above the cylindrical portion 3b in the vertical direction, and the metal rod 19 fitted in the through hole 14a of each connecting member 10 and the metal rod 19 fitted in each through hole 24a of the connecting member 20; Each side plate 2 includes a metal rod 19 fitted to each connecting member 10 fixed to the right in the horizontal direction of each silencing element 1 in the first row and a metal rod 19 fitted to the connecting member 20. Of the two outer ring portions 2b and the outer cylindrical portion 3b of each side plate 3 are inserted into the lower through hole 8 formed in the vertical direction and the two through holes 9 formed leftward in the horizontal direction. Stack elements 1 and similar Four-stage stacking a silencing element 1 in the second column and.

  Then, after four stages of muffler elements 1 are stacked in the third and fourth rows by the same procedure, the flat plate 27 is attached to the right outer peripheral surface in the horizontal direction of each muffler element 1 in the fourth row. The flat plate 27 is erected and fixed on the flat plate 27, and the flat plate 27 is fixed horizontally on the flat plates 27 serving as both side frames, whereby the silencer 26 is completed.

  According to the connection structure of the silencing elements of the second embodiment described above, the silencing element 1 in which the round silencing elements 1 are arranged adjacent to each other, the outer cylindrical portion 2b of each side plate 2, and the outer cylindrical portion of each side plate 3 Each of the connecting members 10 and each connection member 10 and each connection member 20 fixed to the lower outer peripheral surface in the vertical direction is firmly fixed by each connection member 10 and each connection member 20 fixed to 3b. The member 20 is firmly fixed to the flat plate 17 serving as a bottom plate. Furthermore, the respective muffler elements 1 arranged adjacent to each other in the longitudinal direction can be firmly fixed by the connecting members 20. For this reason, position shift and rotation of each circular silencing element 1 can be prevented, and it can prevent that each adjacent silencing element 1 contacts and is damaged.

  Further, by fixing the silencing elements 1 to each other, there is no need to create a grid that supports the silencing elements 1 as in the prior art, and the processing cost and assembly cost for creating the grid can be reduced, and the silencing device The cost required to create 26 can be greatly reduced.

  Further, the recesses 15a, 15b, 15c are formed in each connecting member 10, and the recesses 25a, 25b, 25c are formed in each connecting member 20, so that the flat portion of each metal rod 19 is connected to each connecting member 10 and each connecting member. Protruding from the member 20 can be prevented, the gap between the respective silencing elements 1 can be minimized, and the silencing effect of the silencing device 26 can be ensured.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed. For example, in the present embodiment, the silencing element 1 has one side plate formed in a bell mouth shape, but both side plates may be formed in a bell mouth shape. Furthermore, by using together the thing which formed the outer peripheral surface of the both-sides board in a silencer element in the shape of a perfect cylinder, many silencer elements can be connected and arranged in a longitudinal direction, and it can increase a silence effect more. it can.

  Moreover, it is possible to provide a large number of through-holes through which the metal rods formed in the outer cylindrical portion of each side plate of each connecting member and the round silencing element are inserted in order to strengthen the coupling of the round silencing element. .

a is a schematic front view showing a muffler element used in the connection structure of the muffler element according to the present invention, and b is a vertical sectional side view of a. a is a longitudinal sectional view showing the first embodiment of the connecting member in the connection structure of the silencer element according to the present invention, and b is a plan view of a. The front view which shows the state which fixed the connection member of FIG. 2 to the silencing element of FIG. Schematic front view of the silencer of the first embodiment 3 is a longitudinal sectional view a is a longitudinal sectional view showing a second embodiment of the connecting member in the connection structure of the silencer element according to the present invention, and b is a plan view of a. The front view which shows the state which fixed the connection member of FIG. 6 to the silencing element of FIG. Schematic front view of the silencer of the second embodiment 6 is a longitudinal sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Silencer element 2 Side plate 3 Side plate 4 Porous inner cylinder 5 Porous outer cylinder 6 Sound-absorbing material 7 Nonwoven fabric 8 Through hole (concave portion)
9 Through hole (recess)
DESCRIPTION OF SYMBOLS 10 Connecting member 10a Front surface 10b Back surface 11 Piece 12 Arc surface 13a, 13b Contact protrusion 14 Through-hole 19 Metal rod (protrusion)
20 connecting member 20a front surface 20b back surface 21 piece 22 arc surface 23a, 23b contact projection 24 through hole

Claims (5)

A plurality of muffler elements each having a round cross-section with both ends open are arranged adjacent to each other in a stacked state, and the muffler of the fluid that has passed through each muffler element is silenced by a sound absorbing material disposed in each muffler element. In the connection structure of the silencer element in the silencer to be performed,
Stacked and interposed between the ends of each pair of adjacent silencing elements, contact surfaces having a shape contacting the outer peripheral surfaces of the ends of the silencing elements are formed on the front and back surfaces, And, on the back surface, a connecting member in which at least one protrusion is provided on at least one surface and at least two protrusions on the other surface is disposed,
A coupling structure for a silencing element, wherein a recess into which the projection of the coupling member is inserted is formed on the outer peripheral surface of each end of each pair of silencing elements that sandwich the coupling member.   The coupling members are interposed between the ends of each pair of silencer elements arranged adjacent to each other in the horizontal direction, and each of the pair of silencer elements sandwiching the coupling members in the horizontal direction. The muffler element coupling structure according to claim 1, wherein a concave portion into which the projection of the coupling member is inserted is formed on the outer peripheral surface of the end portion. A plurality of silencing elements each having a round cross section with both ends open are arranged adjacent to each other in the stacked state and in the axial direction, and the fluid passed through each silencing element by the sound absorbing material disposed in each silencing element. In the connection structure of the silencer element in the silencer that silences
Stacked and interposed between the ends of each pair of adjacent silencing elements, contact surfaces having a shape contacting the outer peripheral surfaces of the ends of the silencing elements are formed on the front and back surfaces, And on the back surface, a first connecting member having at least one protrusion on either side and at least two protrusions on the other side is disposed,
Stacked surface and contact surface that is interposed between the ends of each of two pairs of adjacent silencing elements adjacent to each other in the axial direction, and has a shape that contacts the outer peripheral surface of each end of each silencing element on the front and back surfaces Formed on the front surface and the back surface, at least one projection on at least one side, and at least two projections on the other side are arranged in two rows.
A structure for connecting a muffler element, characterized in that a recess into which the projection of the connector member is inserted is formed on the outer peripheral surface of each end of each pair or two pairs of muffler elements that sandwich each of the connection members. .   The first connecting member is interposed between the ends of each pair of silencer elements arranged adjacent to each other in the horizontal direction, and each of the two pairs of silencer elements arranged adjacent to each other in the horizontal direction and the axial direction. The second connecting member is interposed between the respective end portions, and the connecting member is disposed on the outer peripheral surface of each end portion of each of the one pair or each of the two pairs of silencing elements that sandwich the respective connecting members in the horizontal direction. 4. The muffler element coupling structure according to claim 3, wherein a recess into which the protrusion is inserted is formed.   5. The projection of the connecting member is a metal rod provided with a head, and the head of each metal rod is positioned in the groove so as not to protrude from the front surface or the back surface. The connection structure of the silencing element according to any one of the above.