CN215007486U - Impedance composite muffler - Google Patents

Abstract

The utility model discloses an impedance combined type silencer, it includes a noise damping section of thick bamboo, the inlet end cover, the end cover of giving vent to anger, support piece and amortization lap, the inlet end cover is installed respectively at the relative both ends of a noise damping section of thick bamboo with the end cover of giving vent to anger, be provided with the amortization room in the noise damping section of thick bamboo, the both ends of amortization room link up two relative lateral walls of a noise damping section of thick bamboo respectively, gradually the neck is received by the middle part to both ends on the noise damping room, support piece includes the position circle, gu fixed ring reaches a plurality of shell fragments of fixing between position circle and fixed ring, the shell fragment is located in the noise damping room and is cooperated with the inner wall of noise damping room, the position circle clamp is established between a noise damping section of thick bamboo and inlet end cover, a plurality of shell fragments can inwards draw in or outwards expand along support piece's radial, the amortization lap winding is at the outside tubular structure that forms of a plurality of shell fragments, and is fixed between the inner wall of shell fragment and noise damping room by the extrusion when the outwards expansion. The utility model discloses an impedance combined type silencer adopts the spring action of shell fragment self to fix the amortization lap in the amortization room, easy operation, convenient.

Description

Impedance composite muffler

Technical Field

The utility model relates to a silencer technical field especially, relates to an impedance combined type silencer.

Background

The impedance composite muffler is a muffler combining sound absorption and sound reflection, has the characteristics of eliminating middle and high frequency noise by a resistive muffler and eliminating middle and low frequency noise by a reactive muffler while allowing airflow to pass through, and has a good sound elimination effect.

In practical use, after the impedance composite muffler is used for a long time, the silencing cotton roll in the impedance composite muffler is damaged due to the collision of exhaust gas, and at the moment, the silencing cotton roll needs to be replaced. At present, the silencing cotton roll is usually fixedly arranged on the channel wall of the airflow channel in an adhesive mode, the disassembly operation is inconvenient, and colloid is remained on the channel wall of the airflow channel, so that the connection firmness of the renewed silencing cotton roll is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects in the prior art, the impedance composite muffler convenient for disassembling and assembling the silencing cotton roll is provided.

The utility model provides a technical scheme that its technical problem adopted is: an impedance composite muffler comprises a silencing barrel, an air inlet end cover with an air inlet, an air outlet end cover with an air outlet, a support piece and a silencing cotton roll, wherein the air inlet end cover and the air outlet end cover are respectively detachably arranged at two opposite ends of the silencing barrel, a saccular silencing chamber is arranged in the silencing barrel, two ends of the silencing chamber are respectively communicated with two opposite side walls of the silencing barrel, the silencing chamber is gradually contracted from the middle part to the two ends, the support piece comprises a positioning ring, a fixing ring and a plurality of elastic sheets fixed between the positioning ring and the fixing ring, the plurality of elastic sheets are arranged in the silencing chamber and matched with the inner wall of the silencing chamber, the positioning ring is clamped between the silencing barrel and the air inlet end cover, the plurality of elastic sheets can be folded inwards or outwards expanded along the radial direction of the support piece, and the silencing cotton roll is wound outside the plurality of elastic sheets to form a cylindrical structure, and the elastic sheets are extruded and fixed between the elastic sheets and the inner wall of the silencing chamber when being expanded outwards.

Furthermore, a plurality of the elastic pieces are uniformly distributed along the circumferential direction of the supporting piece, and strip-shaped grooves are formed in the side wall, away from the noise reduction cotton roll, of each elastic piece.

Further, the elastic sheet is made of stainless steel material.

Furthermore, an accommodating groove is formed in the side wall, close to the air inlet end cover, of the silencing barrel, the outer diameter of the positioning ring is larger than that of the fixing ring, the positioning ring is accommodated in the accommodating groove in a matched mode, and the positioning ring is attached to the air inlet end cover.

Further, sealing elements are arranged between the silencing barrel and the air inlet end cover and between the silencing barrel and the air outlet end cover.

Furthermore, an air inlet pipe is connected to an air inlet of the air inlet end cover, an air outlet pipe is connected to an air outlet of the air outlet end cover, and the air inlet pipe and the air outlet pipe are coaxially arranged.

Further, the impedance composite muffler further comprises an air inlet connecting pipe and an air outlet connecting pipe, wherein the air inlet connecting pipe is connected with the air inlet pipe, and the air outlet connecting pipe is connected with the air outlet pipe.

The utility model has the advantages that: the utility model provides an impedance combined type silencer, shell fragment can inwards draw in or outwards expand, when drawing in for twine the amortization cotton roll and place it in the amortization room, be used for during the expansion fixing the amortization cotton roll extrusion in the amortization room, compare in traditional mode, avoided dismantling the inconvenient operation in the sticky mode and because the colloid remains the problem that the amortization cotton roll connection is insecure that the reason caused renewing, easy operation, convenient is suitable for using widely.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the impedance composite muffler of the present invention (the elastic piece is in an expanded state);

FIG. 2 is another structural diagram of the impedance composite muffler shown in FIG. 1 between the muffler barrel and the supporting member (the resilient plate is in a closed state);

FIG. 3 is a cross-sectional view of the resilient sheet of the impedance compound muffler of FIG. 1;

fig. 4 is a schematic structural view of the elastic sheet shown in fig. 3 along the direction a;

fig. 5 is a schematic structural view of the impedance composite muffler of fig. 1, in which an external pressure member is used to expand the elastic sheet.

In the figure: 1. the silencing device comprises a silencing barrel, 11, a silencing chamber, 12, an accommodating groove, 13, a sealing piece, 2, an air inlet end cover, 21, an air inlet, 211, an air inlet pipe, 3, an air outlet end cover, 31, an air outlet, 311, an air outlet pipe, 4, a supporting piece, 41, a positioning ring, 42, a fixing ring, 43, an elastic sheet, 431, a strip-shaped groove, 5, a silencing cotton roll, 6, an air inlet connecting pipe, 7, an air outlet connecting pipe, 8, an outer pressing piece, 81, a handle, 82 and a pushing block.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1 and 2, the present invention provides an impedance composite muffler, which comprises a muffling barrel 1, an air inlet cover 2 having an air inlet 21, an air outlet cover 3 having an air outlet 31, a support member 4 and a muffling cotton roll 5, wherein the air inlet cover 2 and the air outlet cover 3 are detachably mounted at opposite ends of the muffling barrel 1, a bag-shaped muffling chamber 11 is disposed in the muffling barrel 1, a longitudinal section of the muffling chamber 11 is circular, two ends of the muffling chamber 11 respectively penetrate through two opposite side walls of the muffling barrel 1, a neck gradually tapers from the middle to the two ends of the muffling chamber 11, the support member 4 comprises a positioning ring 41, a fixing ring 42 and a plurality of elastic pieces 43 fixed between the positioning ring 41 and the fixing ring 42, the plurality of elastic pieces 43 are disposed in the muffling chamber 11 and are matched with an inner wall of the muffling chamber 11, the positioning ring 41 is sandwiched between the muffling barrel 1 and the air inlet cover 2, the plurality of elastic pieces 43 can be folded inward or expanded outward along a radial direction of the support member 4, the noise reduction cotton roll 5 is wound outside the plurality of elastic sheets 43 to form a cylindrical structure, and is fixed between the elastic sheets 43 and the inner wall of the noise reduction chamber 11 by being pressed when the plurality of elastic sheets 43 are expanded outwards.

The utility model discloses an impedance combined type silencer, during the equipment, make a plurality of shell fragments 43 inwards draw in under the effect of external force, at this moment, support piece 4's middle part indent, then 5 winds the amortization cotton roll in the outside of a plurality of shell fragments 43, then, install support piece 4 on amortization section of thick bamboo 1, make shell fragment 43 be located amortization room 11 (please refer to fig. 2) together with amortization cotton roll 5, end cover 2 installs in one side of amortization section of thick bamboo 1 and fixes the position circle 41 extrusion, then handheld external casting die 8 stretches into in the amortization section of thick bamboo 1 from the one end of solid fixed ring 42 (please refer to fig. 5), and radially push up shell fragment 43, finally make shell fragment 43 outwards expand under self elastic action and come, and then extrude amortization cotton roll 5 on the inner wall of amortization room 11 (please refer to fig. 1), realize the fixed mounting function of amortization cotton roll 5. It should be noted that when the noise reduction cotton roll 5 is wound, the noise reduction cotton roll 5 is in a loose state, so as to prevent the elastic sheet 43 from being difficult to expand outward due to the too tight winding of the noise reduction cotton roll 5. When amortization lap 5 needs to be changed, pull down inlet end cover 2, because shell fragment 43 has elasticity, can take place deformation, the user can take out support piece 4 together with amortization lap 5 from one side of inlet end cover 2.

The utility model discloses an elastic action of shell fragment 43 self fixes amortization cotton roll 5 in amortization room 11, has avoided dismantling in the sticky mode that the operation is inconvenient and because the colloid remains the problem that the amortization cotton roll 5 connection is insecure that the reason caused renewing, easy operation, convenient.

When the silencer is used, gas enters the silencing chamber 11 through the gas inlet 21 and then flows out of the gas outlet 31, and the gas undergoes section mutation in the processes of entering and discharging, so that sound waves are reflected and interfered, and the function of eliminating middle and low frequency noise in the reactive silencer is achieved; and the silencing cotton roll 5 is arranged on the inner wall of the silencing chamber 11, so that the resistance of sound transmission is increased, and the function of eliminating middle and high frequency noises in the resistive silencer is achieved.

Referring to fig. 3 and 4, in a specific embodiment, a plurality of elastic sheets 43 are uniformly distributed along the circumferential direction of the supporting member 4, and a strip-shaped groove 431 is formed on the side wall of the elastic sheet 43 away from the noise reduction cotton roll 5. Through setting up bar recess 431, but the thickness of attenuate shell fragment 43 does benefit to shell fragment 43 and warp easily, conveniently makes shell fragment 43 outwards expand, and simultaneously, bar recess 431 has increased the area of contact of shell fragment 43 with gas for sound energy is fully converted to heat energy, thereby improves noise elimination effect.

In the present embodiment, the spring plate 43 is made of a stainless material.

An accommodating groove 12 is formed in the side wall, close to the air inlet end cover 2, of the silencing barrel 1, the outer diameter of the positioning ring 41 is larger than that of the fixing ring 42, the positioning ring 41 is accommodated in the accommodating groove 12 in a matched mode, and the positioning ring 41 is attached to the air inlet end cover 2. When installed, the positioning ring 41 is engaged with and snapped into the receiving groove 12, which indicates that the supporting member 4 is installed in place, and when the supporting member 4 is installed in place, the fixing ring 42 is located in the end of the muffling chamber 11 near the outlet end cap 3. In order to avoid that the fixing ring 42 moves axially when the pressing member 8 pushes the elastic piece 43 outward, and further the expansion of the elastic piece 43 is affected, when the elastic piece 43 is expanded, the fixing ring 42 may be fixed on the inner wall of one end of the muffling chamber 11, and the fixing manner may be a bolt connection, and the like, which is not limited herein.

Referring to fig. 1 again, in order to avoid gas leakage, sealing members 13 are disposed between the silencing pot 1 and the inlet end cap 2 and between the silencing pot 1 and the outlet end cap 3. It will be appreciated that the seal 13 is made of silicone or rubber material. In the present embodiment, the silencing pot 1 and the inlet end cap 2 and the silencing pot 1 and the outlet end cap 3 are connected by bolts.

The air inlet 21 of the air inlet end cover 2 is connected with an air inlet pipe 211, the air outlet 31 of the air outlet end cover 3 is connected with an air outlet pipe 311, and the air inlet pipe 211 and the air outlet pipe 311 are coaxially arranged, so that the air flow resistance can be effectively reduced, and the air displacement is ensured.

The utility model discloses an impedance combined type silencer still includes inlet connection pipe 6 and outlet connection pipe 7, and inlet connection pipe 6 is connected with intake pipe 211, and outlet connection pipe 7 is connected with outlet duct 311. When the air inlet connecting pipe is used, the air inlet connecting pipe 6 is used for being connected with engineering machinery which makes sound, and the air outlet connecting pipe 7 is used for exhausting air.

In addition, the external pressing member 8 includes a handle 81 and a pushing block 82, the pushing block 62 is a disk-shaped structure, when in use, the pushing block 82 is extended into the space formed by the plurality of elastic sheets 43, the handle 81 is held by hand to swing the pushing block 82, so that the elastic sheets 43 are expanded. The pushing block 82 is made of a silicone material to prevent the pushing block 82 from damaging the elastic sheet 43.

The utility model provides an impedance combined type silencer, shell fragment 43 can inwards draw in or outwards expand, when drawing in for twine amortization cotton roll 5 and place it in amortization room 11, be used for during the expansion to fix amortization cotton roll 5 extrusion in amortization room 11, compare in traditional mode, it is inconvenient and because the colloid remains the problem that the amortization cotton roll 5 that causes renewing is connected insecurely to dismantle the operation in having avoided sticky mode, easy operation, convenient, be suitable for using widely.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. An impedance composite muffler, characterized in that: the silencer comprises a silencing barrel, an air inlet end cover with an air inlet, an air outlet end cover with an air outlet, a support piece and a silencing cotton roll, wherein the air inlet end cover and the air outlet end cover are respectively detachably arranged at two opposite ends of the silencing barrel, a bag-shaped silencing chamber is arranged in the silencing barrel, two ends of the silencing chamber are respectively communicated with two opposite side walls of the silencing barrel, the silencing chamber is gradually contracted from the middle part to two ends, the support piece comprises a positioning ring, a fixing ring and a plurality of elastic sheets fixed between the positioning ring and the fixing ring, the plurality of elastic sheets are arranged in the silencing chamber and matched with the inner wall of the silencing chamber, the positioning ring is clamped between the silencing barrel and the air inlet end cover, the plurality of elastic sheets can be inwards folded or outwards expanded along the radial direction of the support piece, and the silencing cotton roll is wound outside the plurality of elastic sheets to form a cylindrical structure, and the elastic sheets are extruded and fixed between the elastic sheets and the inner wall of the silencing chamber when being expanded outwards.

2. The impedance compound muffler of claim 1, wherein: the elastic pieces are uniformly distributed along the circumferential direction of the supporting piece, and strip-shaped grooves are formed in the side wall, away from the noise reduction cotton roll, of each elastic piece.

3. The impedance compound muffler of claim 1 or 2, wherein: the elastic sheet is made of stainless steel materials.

4. The impedance compound muffler of claim 1, wherein: an accommodating groove is formed in the side wall, close to the air inlet end cover, of the silencing barrel, the outer diameter of the positioning ring is larger than that of the fixing ring, the positioning ring is accommodated in the accommodating groove in a matched mode, and the positioning ring is attached to the air inlet end cover.

5. The impedance compound muffler of claim 4, wherein: sealing elements are arranged between the silencing barrel and the air inlet end cover and between the silencing barrel and the air outlet end cover.

6. The impedance compound muffler of claim 1, wherein: the air inlet end cover is characterized in that an air inlet pipe is connected to an air inlet of the air inlet end cover, an air outlet pipe is connected to an air outlet of the air outlet end cover, and the air inlet pipe and the air outlet pipe are coaxially arranged.

7. The impedance compound muffler of claim 6, wherein: the impedance composite muffler further comprises an air inlet connecting pipe and an air outlet connecting pipe, wherein the air inlet connecting pipe is connected with the air inlet pipe, and the air outlet connecting pipe is connected with the air outlet pipe.

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