JP2022160730A - Silencer - Google Patents

Abstract

To provide a silencer 10 that has a simple structure and facilitates an operation for replacing a sound absorption material 21 and a filter material 22.SOLUTION: Connection between a head 16b of a stay 16 and an upper surface 12a of a case body 12 with a bolt 17 is released to detach the case body 12 from a case bottom surface 13. An element member 20 held by the upper surface 12a of the case body 12 and the case bottom surface 13 is opened, so that the element member 20 mounted on the case bottom surface 13 can be took down from the case bottom surface 13. Since the element member 20 is held by the upper surface 12a of the case body 12 and the case bottom surface 13, the element member 20 stored in a case 11 can be easily taken out from the case 11 by loosening the bolt 17 to release connection between the upper surface 12a of the case body 12 and the case bottom surface 13.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencer that includes a sound absorbing material and a filter material that filters outside air and that is connected to the suction port of a blower.

One type of silencer of this type is disclosed in Japanese Utility Model Registration No. 3001902. This silencer has an inner cylinder and an outer cylinder with a large number of through holes formed on the peripheral surface, a sound absorbing cylinder filled with a sound absorbing material between the inner cylinder and the outer cylinder, and a mounting flange provided at the lower end, and a sound absorbing cylinder. Equipped with a case for housing the cylinder, the sound absorbing cylinder is housed in the case so that the sound absorbing cylinder is exposed from the bottom of the case, and a mesh tube with approximately the same diameter as the case is attached to the exposed part of the sound absorbing cylinder so as to surround the mesh tube and the case. is wrapped with filter material.

According to the above silencer, when the flange of the sound absorbing material is connected to the suction port of the roots blower and the roots blower is operated, the outside air passes through the filter material and is sucked into the sound absorbing cylinder from the exposed portion of the sound absorbing cylinder. It is sucked into the rotor chamber of the Roots blower. Then, outside air is filtered by the filter material and is muffled when passing through the sound absorbing cylinder.

Utility Model Registration No. 3001902

Not only is the structure of the above-described conventional silencer complicated, but when replacing the sound absorbing material, the net pipe and the filter material wound around the case are removed, and then the net pipe is removed from the exposed portion of the sound absorbing cylinder. Next, it is necessary to remove the sound absorbing cylinder from the case and remove the sound absorbing material from the sound absorbing cylinder. Therefore, the replacement work of the sound absorbing material is extremely troublesome and takes time.
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a silencer having a simple structure and facilitating replacement work of the sound absorbing material and the filter material.

The invention according to claim 1,
A silencer comprising a sound absorbing material and a filter material for filtering outside air and connected to a blower suction port,
It has a double cylinder structure consisting of an inner cylinder and an outer cylinder for noise reduction with many through holes formed on the peripheral surface, a sound absorbing cylinder filled with sound absorbing material between the inner cylinder and the outer cylinder, It has a double cylinder structure consisting of an inner cylinder and an outer cylinder for a filter with through holes, a filter cylinder filled with filter material between the inner cylinder and the outer cylinder, and the sound absorbing cylinder and the filter cylinder are concentric. an element member in which the sound absorbing cylinder and the filter cylinder are connected to each other by a cylinder connecting means;
Equipped with a case for storing the element member,
The case consists of a case body and a case bottom detachably fitted to the lower end opening of the case body,
Multiple bottom suction ports are formed on the bottom of the case to communicate the inside and outside of the case,
A short pipe connected to the blower suction port is installed vertically in the center of the bottom of the case,
A cylindrical stay with a large number of through holes formed in the peripheral surface is erected in the case from the bottom of the case so as to communicate with the short pipe,
Place the element member on the bottom surface of the case so that the stay penetrates and store it in the case,
The upper surface of the case body and the head of the stay are releasably connected by the stay connecting means, the upper end of the filter cylinder or sound absorbing cylinder is brought into contact with the upper surface of the case body, and the lower end of the filter cylinder or sound absorbing cylinder is brought into contact with the bottom surface. and the element member is sandwiched between the top surface of the case body and the bottom surface of the case,
The outside air sucked into the case from the bottom suction port passes through the filter cylinder and the sound absorbing cylinder, and further passes through the stay and is sucked from the short pipe to the blower.

Preferably, a bottom suction pipe formed with a large number of expansion holes whose inner diameter gradually increases from the inside to the outside communicates with the bottom suction port and is erected on the bottom of the case so as to protrude into the case.

Preferably, as the tube connecting means, a flange having an outer ring groove and an inner ring groove is provided, the lower end of the filter tube is detachably fitted in one ring groove, and the lower end of the sound absorbing tube is attached to the other ring groove. to be detachably attached.
Preferably, bolts are used as stay connecting means.
Also, preferably, a drain pipe is provided on the bottom surface of the case.

According to the silencer of the present invention, when the short pipe is connected to the suction port of the blower and the blower is operated, outside air is sucked into the case through the bottom suction port. The sucked outside air passes through the filter cylinder and the sound absorbing cylinder, passes through the stay, and is sucked from the short pipe to the blower. Outside air sucked into the silencer is filtered when passing through the filter cylinder to remove foreign matters, and is muffled when passing through the sound absorbing cylinder.

When replacing the sound absorbing material or the filter material, the connection between the head of the stay and the upper surface of the case main body by the stay connecting means is released, and the case main body is removed from the bottom surface of the case. As a result, the element member sandwiched between the upper surface of the case main body and the case bottom surface is released, so that the element member placed on the case bottom surface is removed from the case bottom surface. Then, remove the sound absorbing material from the sound absorbing cylinder and replace it with a new one. Similarly, remove the filter material from the filter cylinder and replace it with a new one.

According to the present invention, since the element material is sandwiched between the upper surface of the case body and the case bottom surface, the element member housed in the case can be removed by releasing the connection between the upper surface of the case body and the case bottom surface by the stay connecting means. It can be easily removed from the case.
Further, since the filter cylinder and the sound absorbing cylinder are integrally connected by the cylinder connecting means, the filter cylinder and the sound absorbing cylinder can be taken out at the same time, and the filter material and the sound absorbing material can be replaced easily and quickly. .

1 is a cross-sectional view showing a silent according to an embodiment of the present invention and a roots blower to which the same silencer is attached; FIG. FIG. 2 is a cross-sectional view cut from line 2-2 of FIG. 1; It is a sectional view showing an element member of the same silencer. It is a sectional view showing a silencer suction pipe of the same silencer.

The present invention will be described below with reference to the drawings. 1 to 3 show a silencer 10 according to one embodiment of the invention. The silencer 10 is used by being connected to a suction port 31 of a roots blower 30, and has a box-shaped case 11 in which an element member 20 is built.

The case 11 comprises a case main body 12 and a case bottom surface 13. The case main body 12 has an opening surface 12a formed at its lower end.

A short pipe 14 that communicates the inside and outside of the case 11 is vertically installed in the center of the case bottom surface 13, protrudes to the outside of the case body 12, and has a flange 15 connected to the suction port 31 of the roots blower 30 at the protruding end. It is A stay 16 having a cylindrical structure is erected on the bottom surface 13 of the case and protrudes into the case body 12 . A large number of through holes 16 a are formed in the peripheral surface of the stay 16 to communicate the inside and outside of the stay 16 . A head portion 16b of the stay 16 is formed flat. A bolt 17 is erected on the head 16b. A plurality of bottom suction ports 13 a communicating between the inside and outside of the case 11 are formed in the case bottom 13 so as to surround the stay 16 in a ring shape. A bottom suction pipe 18 that communicates with the bottom suction port 13 a is erected on the case bottom face 13 so as to protrude into the case body 11 . As shown in FIG. 4, the peripheral surface of the bottom suction pipe 18 is formed with a large number of expansion holes 18a that communicate with the inside and outside of the bottom suction pipe 18 and whose inner diameter gradually increases from the inner end to the outer end. . A drain pipe 19 is vertically provided on the bottom surface 13 of the case.

The element member 20 includes a sound absorbing material 21 and a filter material 22 for filtering outside air. A sound absorbing cylinder 23 is filled with the sound absorbing material 21 . The sound absorbing cylinder 23 has a double cylinder structure consisting of an inner cylinder 23a and an outer cylinder 23b for noise reduction, and a large number of through holes 23c are formed in the peripheral surfaces of the inner cylinder 23a and the outer cylinder 23b. Similarly, the filter material 22 is filled in the filter cylinder 24 . The filter cylinder 24 has a double cylinder structure consisting of an inner cylinder 24a and an outer cylinder 24b for filtering, and a large number of through holes 24c are formed in the peripheral surfaces of the inner cylinder 24a and the outer cylinder 24b.

The sound absorbing tube 23 and the filter tube 24 are arranged concentrically, and a lower flange 25 is attached to each lower end. The lower flange 25 is provided with two ring grooves 25a and 25b, an inner ring groove 25a and an outer ring groove 25b. 24 is fitted. The sound absorbing cylinder 23 and the filter cylinder 24 are integrally connected by the lower flange 25 . A first upper flange 26 is attached to the upper end of the sound absorbing tube 23 . A single ring groove 26a is provided in the first upper flange 26, and the upper end portion of the sound absorbing cylinder 23 is fitted in the ring groove 26a. A second upper flange 27 is attached to the upper end of the filter tube 24 . A single ring groove 27a is provided in the second upper flange 27, and the upper end portion of the filter cylinder 24 is fitted in the ring groove 27a.

The element member 20 is placed on the case bottom surface 13 and stored in the case 11 so that the stay 16 penetrates and is arranged inside the ring row of the bottom surface suction port 13a. Then, the upper surface 12a of the case main body 12 and the head portion 16a of the stay 16 are connected with the bolt 17 and the nut 17a. At this time, the tightening condition of the bolts 17 is adjusted so that the second upper flange 27 contacts the upper surface 12 a of the case body 12 and the lower flange 25 contacts the case bottom surface 13 , and the element member 20 is attached to the upper surface of the case body 12 . 12a and the bottom surface 13 of the case.

The silencer 10 according to this embodiment is used by connecting the short pipe 14 to the suction port 31 of the roots blower 30 . When the roots blower 30 is operated, outside air is sucked into the case 11 through the bottom suction port 13a. The sucked outside air passes through the filter cylinder 24 and the sound absorbing cylinder 23 , passes through the stay 16 and is sucked from the short pipe 14 into the rotor chamber 32 of the roots blower 30 . Outside air sucked into the silencer 10 is filtered when passing through the filter cylinder 24 to remove foreign matters, and when passing through the sound absorbing cylinder 23, noise is muted. Moisture in the outside air such as rainwater collected on the bottom surface 13 of the case is discharged from the case 11 through the drain pipe 19 .

When replacing the sound absorbing material 21 and filter material 22 of the silencer 10 , the connection between the head portion 16 b of the stay 16 and the upper surface 12 a of the case body 12 by the bolts 17 is released, and the case body 12 is removed from the case bottom surface 13 . As a result, the element member 20 sandwiched between the upper surface 12a of the case main body 12 and the case bottom surface 13 is released, so that the element member 20 placed on the case bottom surface 13 is removed from the case bottom surface 13. Then, the sound absorbing material 21 is removed from the sound absorbing cylinder 23 and replaced with a new one. Similarly, the filter material 22 is removed from the filter cylinder 24 and replaced with a new one.

According to the silencer 10 of this embodiment, since the element member 20 is sandwiched between the upper surface 12a of the case body 12 and the case bottom surface 13, the bolt 17 is loosened to disconnect the upper surface 12a of the case body 12 and the case bottom surface 13. When released, the element member 20 stored in the case 11 can be easily taken out from the case 11.例文帳に追加

Since the filter cylinder 24 and the sound absorbing cylinder 23 are integrally connected by the lower flange 25, the filter cylinder 24 and the sound absorbing cylinder 23 can be taken out at the same time, and the filter material 22 and the sound absorbing material 21 can be replaced easily and quickly. It can be carried out.

When the outside air is sucked into the case 11 through the bottom suction pipe 18, it is expanded and discharged into the inner space of the case 11 through the expansion hole 18a, so that in addition to the noise reduction effect of the sound absorbing material 21, the expansion hole 18a also has a noise reduction effect. Obtainable.

Since the silencer 10 is connected to the roots blower 30 by the short pipe 14 and installed in the immediate vicinity of the rotor chamber 32, operation noise can be reduced more efficiently.

DESCRIPTION OF SYMBOLS 10... Silencer 11... Case 12... Case main body 12a... Upper surface (of case main body) 13... Case bottom surface 13a... Bottom surface suction port 14... Short pipe 15... Flange 16... Stay 16a... Through hole 16b... Head 17... Bolt 17a... Nut 18 Bottom suction pipe 19 Drain pipe 20 Element member 21 Sound absorbing material 22 Filter material 23 Sound absorbing cylinder 23a Sound deadening inner cylinder 23b Sound deadening outer cylinder 23c Through hole 24 Filter cylinder 24a Filter inner cylinder 24b Filter outer cylinder 24c Through hole 25 Lower flange 25a Inner ring groove 25b Outer ring groove 26 First upper flange 26a Ring groove 27 Second upper flange 27a Ring groove 30... Roots blower 31... Suction port 32... Rotor chamber

Claims (5)

A silencer comprising a sound absorbing material and a filter material for filtering outside air and connected to a blower suction port,
It has a double cylinder structure consisting of an inner cylinder and an outer cylinder for noise reduction with many through holes formed on the peripheral surface, a sound absorbing cylinder filled with sound absorbing material between the inner cylinder and the outer cylinder, It has a double cylinder structure consisting of an inner cylinder and an outer cylinder for a filter with through holes, a filter cylinder filled with filter material between the inner cylinder and the outer cylinder, and the sound absorbing cylinder and the filter cylinder are concentric. an element member in which the sound absorbing cylinder and the filter cylinder are connected to each other by a cylinder connecting means;
Equipped with a case for storing the element member,
The case consists of a case body and a case bottom detachably fitted to the lower end opening of the case body,
Multiple bottom suction ports are formed on the bottom of the case to communicate the inside and outside of the case,
A short pipe connected to the blower suction port is installed vertically in the center of the bottom of the case,
A cylindrical stay with a large number of through holes formed in the peripheral surface is erected in the case from the bottom of the case so as to communicate with the short pipe,
Place the element member on the bottom surface of the case so that the stay penetrates and store it in the case,
The upper surface of the case body and the head of the stay are releasably connected by the stay connecting means, the upper end of the filter cylinder or sound absorbing cylinder is brought into contact with the upper surface of the case body, and the lower end of the filter cylinder or sound absorbing cylinder is brought into contact with the bottom surface. and the element member is sandwiched between the top surface of the case body and the bottom surface of the case,
A silencer characterized in that outside air sucked into a case from a bottom suction port passes through a filter cylinder and a sound absorbing cylinder, passes through a stay, and is sucked from a short pipe to a blower. 2. A bottom suction pipe having a plurality of expansion holes with an inner diameter gradually increasing from the inside to the outside is communicated with the bottom suction port and erected on the bottom of the case so as to protrude into the case. silencer. A flange having an outer ring groove and an inner ring groove is provided as a tube connecting means, the lower end of the filter tube is detachably fitted into one ring groove, and the lower end of the sound absorbing tube is detachably attached to the other ring groove. 2. The silencer according to claim 1, wherein the silencer is fitted to the 2. The silencer according to claim 1, wherein a bolt is used as the stay connecting means. 2. The silencer according to claim 1, wherein a drain pipe is provided on the bottom surface of the case.

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