A noise reduction device

Abstract

The present invention discloses a silencer device, belonging to the technical field of silencers, comprising: a shell, and a first silencer unit, a second silencer unit, a third silencer unit, and a fourth silencer unit which are sequentially installed in the shell at intervals; the first silencer unit is installed at one end of the shell, the fourth silencer unit is installed at the other end of the shell, and the second silencer unit and the third silencer unit are located between the first silencer unit and the fourth silencer unit; wherein the noise enters from the first silencer unit, passes through the second silencer unit, the third silencer unit, and the fourth silencer unit in sequence, and is finally eliminated in the fourth silencer unit. The present invention assembles the first silencer unit, the second silencer unit, the third silencer unit, and the fourth silencer unit in combination, so that the product has better assembly and interchangeability, is easier to produce, transport, and install, and effectively improves the sound reduction of the product by optimizing the structure and appearance.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, and in particular to a muffler device. Background Art

[0002] The muffler is one of the necessary noise reduction equipment. The traditional muffler takes up a lot of space, is difficult to disassemble and repair, has a small noise reduction capacity, large flow resistance, and high airflow regeneration noise, which will affect the efficiency of the entire equipment and the noise reduction effect is not ideal.

[0003] In view of this, a silencer device is designed which can be perfectly combined with a soundproof room to form a noise reduction whole to achieve the effect of sound insulation and noise reduction. Summary of the invention

[0004] In view of the above problems, the present invention provides a silencer.

[0005] The technical solution adopted by the present invention is: a silencing device, comprising: a shell, and a first silencing unit, a second silencing unit, a third silencing unit, and a fourth silencing unit installed in the shell in sequence and at intervals;

[0006] The first muffler unit is installed at one end of the housing, and the fourth muffler unit is installed at the other end of the housing.

[0007] The second muffler unit and the third muffler unit are located between the first muffler unit and the fourth muffler unit;

[0008] The noise enters from the first silencer unit, passes through the second silencer unit, the third silencer unit and the fourth silencer unit in sequence, and is finally eliminated in the fourth silencer unit.

[0009] Furthermore, the first muffler unit comprises: a first mounting seat, glass wool and a plurality of first muffler pipes;

[0010] The first mounting seat is embedded in the front end of the housing, and a plurality of first mounting holes are formed through the first mounting seat.

[0011] The first silencer pipe is sleeved in the first mounting hole, and the glass wool is filled in the first silencer pipe.

[0012] Furthermore, the second muffler unit comprises: a second mounting seat, glass wool and a plurality of second muffler pipes;

[0013] The second mounting seat is embedded in the housing, and a plurality of second mounting holes are formed through the second mounting seat.

[0014] The second silencer pipe is sleeved in the second mounting hole, and the second silencer pipes are connected in sequence through pipes.

[0015] The glass wool is filled in the second muffler pipe.

[0016] Furthermore, the cross-section of the second silencer pipe is in an isosceles trapezoidal shape, wherein the large diameter end of the second silencer pipe is close to the first silencer unit.

[0017] Furthermore, a plurality of grooves are provided on the inner wall of the second muffler pipe, and the grooves are in a spiral shape.

[0018] Furthermore, the third muffler unit comprises: a third mounting seat, a third muffler pipe and glass wool;

[0019] The third mounting seat comprises: a first mounting plate, a second mounting plate and a third mounting plate;

[0020] The first mounting plate, the second mounting plate and the third mounting plate are sequentially embedded in the housing at intervals, wherein the first mounting plate is arranged close to the second muffler unit;

[0021] The third muffler pipe comprises: a first pipe, a plurality of second pipes and a plurality of third pipes;

[0022] The first pipe is plugged into the first mounting plate and the second mounting plate.

[0023] One end of the first pipe passes through the first mounting plate, and the other end of the first pipe passes through the second mounting plate;

[0024] The second pipe is plugged into the second mounting plate.

[0025] One end of the second pipeline is located between the first mounting plate and the second mounting plate, and the other end of the second pipeline is located between the second mounting plate and the third mounting plate;

[0026] The third pipe is plugged into the second mounting plate and the third mounting plate.

[0027] One end of the third pipeline passes through the second mounting plate, and the other end of the third pipeline passes through the third mounting plate;

[0028] The glass wool is filled in the first pipe, the second pipe and the third pipe respectively.

[0029] Furthermore, the first pipe diameter is larger than the second pipe diameter, and the second pipe diameter is smaller than the third pipe diameter.

[0030] Furthermore, the fourth muffler unit comprises: a fourth mounting seat, glass wool and a plurality of fourth muffler pipes;

[0031] The fourth mounting seat is embedded in the rear end of the housing, and a plurality of silencer holes are formed through the fourth mounting seat.

[0032] The fourth silencer pipe is sleeved in the silencer hole, and the glass wool is filled in the fourth silencer pipe.

[0033] Furthermore, the fourth silencer pipe is an elliptical pipe, the cross section of the silencer hole is elliptical, and the silencer hole is obliquely arranged on the fourth mounting seat.

[0034] Beneficial effects of the present invention:

[0035] By combining and assembling the first silencer unit, the second silencer unit, the third silencer unit and the fourth silencer unit, the product has better assemblability and interchangeability, is easier to produce, transport and install, and effectively improves the sound reduction of the product by optimizing the structure and appearance.

[0036] This silencer consists of a silencer unit, glass wool and a shell. Different silencer methods are used inside to reduce the noise step by step, and finally reduce the noise to a minimum or eliminate it. As a whole, it can be perfectly combined with the soundproof room to form a noise reduction system, thereby achieving the effect of sound insulation and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings constituting a unit of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0038] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0039] Figure 2 is a schematic diagram of the installation of the first muffler unit according to an embodiment of the present invention;

[0040] Figure 3 is a schematic diagram of the installation of a fourth muffler unit according to an embodiment of the present invention;

[0041] Figure 4 is a schematic structural diagram of a second muffler unit according to an embodiment of the present invention;

[0042] Figure 5 Schematic diagram of the structure of the third muffler unit according to an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1 is the first mounting seat, 101 is the first silencer pipe, 2 is the second mounting seat, 201 is the second silencer pipe, 202 is the pipe, 3 is the shell, 301 is the first mounting plate, 302 is the second mounting plate, 303 is the third mounting plate, 304 is the first pipe, 305 is the second pipe, 306 is the third pipe, 4 is the fourth mounting seat, and 401 is the fourth silencer pipe. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] See also Figures 1 to 5 ,like Figures 1 to 5 As shown, a silencing device comprises: a housing 3, and a first silencing unit, a second silencing unit, a third silencing unit, and a fourth silencing unit which are sequentially installed in the housing 3 at intervals;

[0047] The first muffler unit is installed at one end of the housing 3, and the fourth muffler unit is installed at the other end of the housing 3.

[0048] The second muffler unit and the third muffler unit are located between the first muffler unit and the fourth muffler unit;

[0049] The noise enters from the first silencer unit, passes through the second silencer unit, the third silencer unit and the fourth silencer unit in sequence, and is finally eliminated in the fourth silencer unit.

[0050] It should be noted that the main inventive point of this scheme is that the four silencer units can be installed in combination according to the actual scenario, and noises of different decibels can be eliminated and absorbed in a targeted manner, that is, noise reduction and noise elimination can be carried out in a targeted manner, and installation and disassembly can be facilitated.

[0051] In one embodiment of the present invention, the first muffler unit comprises: a first mounting seat 1, glass wool and a plurality of first muffler pipes 101;

[0052] The first mounting seat 1 is embedded in the front end of the housing 3, and a plurality of first mounting holes are formed through the first mounting seat 1.

[0053] The first silencer pipe 101 is sleeved in the first mounting hole, and the glass wool is filled in the first silencer pipe 101 .

[0054] It should be noted that glass wool is a product made of centrifugal glass wool felt, which is made of molten glass fiber and an environmentally friendly formula binder mainly composed of thermosetting resin. It is an elastic felt made of glass fiber with a diameter of only a few microns, and different moisture-proof veneers can be selected for online compounding according to the use requirements. It has a large number of tiny air pores, which makes it play the role of heat preservation, sound absorption and noise reduction, and safety protection. It is the best material for heat preservation, sound absorption and noise reduction of steel structure buildings.

[0055] When the noise enters the first silencer unit, it is divided into several parts by the first silencer pipe, the noise is reduced, and then the noise propagates along the first silencer pipe, during which part of the noise is absorbed by the sound insulation cotton, and then the noise propagates from the first silencer pipe and is ready to enter the second silencer unit.

[0056] In one embodiment of the present invention, the second muffler unit comprises: a second mounting base 2, glass wool and a plurality of second muffler pipes 201;

[0057] The second mounting seat 2 is embedded in the housing 3, and a plurality of second mounting holes are formed through the second mounting seat 2.

[0058] The second silencer pipe 201 is sleeved in the second mounting hole, and the second silencer pipes 201 are connected in sequence through the pipe 202.

[0059] The glass wool is filled in the second muffler tube 201 .

[0060] It should be noted that the noise propagating from the first lower silencer pipe has been weakened. At this time, the noise with reduced decibels enters from the second lower silencer pipe and then propagates from the second silencer pipe. In this process, part of the noise propagates along the first silencer pipe, part of the noise propagates along the pipe to cancel each other out, and the remaining part is absorbed by the sound insulation cotton. Therefore, the noise is further reduced in decibels after passing through the second silencer unit on the basis of the first silencer unit. When the noise propagates from the second silencer pipe, it is ready to enter the third silencer unit.

[0061] In one embodiment of the present invention, the cross section of the second silencer pipe 201 is in an isosceles trapezoidal shape, wherein the large diameter end of the second silencer pipe 201 is close to the first silencer unit.

[0062] Among them, the shape and setting of the second silencer pipe is similar to a cone shape. Its main function is that after the noise is transmitted from the first silencer unit, the noise can enter the second silencer pipe along the large end of the second silencer pipe in time to reduce and eliminate noise, thereby avoiding the noise from being reflected back along the first silencer pipe.

[0063] In one embodiment of the present invention, a plurality of grooves are provided on the inner wall of the second muffler pipe 201, and the grooves are in a spiral shape.

[0064] Among them, when the noise propagates in the second silencer, the spiral groove can cooperate with the pipe to change the frequency of the noise and slow down the propagation speed, so that the noises cancel each other out, reduce the decibel of the noise, and eliminate part of the noise.

[0065] In one embodiment of the present invention, the third muffler unit comprises: a third mounting seat, a third muffler pipe and glass wool;

[0066] The third mounting seat includes: a first mounting plate 301, a second mounting plate 302 and a third mounting plate 303;

[0067] The first mounting plate 301, the second mounting plate 302 and the third mounting plate 303 are sequentially embedded in the housing 3 at intervals, wherein the first mounting plate 301 is arranged close to the second muffler unit;

[0068] The third muffler pipe includes: a first pipe 304, a plurality of second pipes 305 and a plurality of third pipes 306;

[0069] The first pipe 304 is plugged into the first mounting plate 301 and the second mounting plate 302.

[0070] One end of the first pipe 304 passes through the first mounting plate 301, and the other end of the first pipe 304 passes through the second mounting plate 302;

[0071] The second pipe 305 is plugged into the second mounting plate 302.

[0072] One end of the second pipe 305 is located between the first mounting plate 301 and the second mounting plate 302, and the other end of the second pipe 305 is located between the second mounting plate 302 and the third mounting plate 303;

[0073] The third pipe 306 is plugged into the second mounting plate 302 and the third mounting plate 303.

[0074] One end of the third pipe 306 passes through the second mounting plate 302, and the other end of the third pipe 306 passes through the third mounting plate 303;

[0075] The glass wool is filled in the first pipe 304 , the second pipe 305 , and the third pipe 306 , respectively.

[0076] It should be noted that after the noise propagates from the second silencer pipe, it first enters between the second mounting plate and the third mounting plate along the first pipe, and then the noise propagates along the second pipe to between the first mounting plate and the second mounting plate, and finally the noise enters the fourth silencer unit from between the first mounting plate and the second mounting plate along the third pipe.

[0077] In this process, part of the noise is first absorbed by the sound insulation cotton, and the other part of the noise enters the first pipe from the second silencer unit, and the noise propagates along the second pipe to between the first mounting plate and the second mounting plate. At this time, because the second pipe connects the two sides of the second mounting plate, part of the noise between the first mounting plate and the second mounting plate enters the fourth silencer unit along the third pipe, and part of it offsets the noise between the second mounting plate and the third mounting plate, thereby further reducing the noise decibels on the basis of the second silencer unit, and eliminating part of the noise.

[0078] In one embodiment of the present invention, the diameter of the first pipe 304 is greater than the diameter of the second pipe 305 , and the diameter of the second pipe 305 is smaller than the diameter of the third pipe 306 .

[0079] Among them, the first pipe has the largest diameter, and the noise can enter the third silencer unit in time; the second pipe has the smallest diameter, which provides sufficient time for the noise to offset each other.

[0080] In one embodiment of the present invention, the fourth muffler unit comprises: a fourth mounting base, glass wool and a plurality of fourth muffler pipes 401;

[0081] The fourth mounting seat 4 is embedded in the rear end of the housing 3, and a plurality of silencer holes are formed through the fourth mounting seat 4.

[0082] The fourth silencer pipe 401 is sleeved in the silencer hole, and the glass wool is filled in the fourth silencer pipe 401 .

[0083] In one embodiment of the present invention, the fourth silencer pipe 401 is an elliptical pipe, the cross section of the silencer hole is elliptical, and the silencer hole is obliquely arranged on the fourth mounting seat 4 .

[0084] It should be noted that the noise is transmitted from the third silencer unit. When it enters the fourth silencer pipe, the direction of noise propagation changes due to the inclined setting of the fourth silencer pipe. At this time, the noise is offset at the pipe mouth of the fourth silencer pipe. After entering the fourth silencer pipe, it is absorbed by the sound insulation cotton. The noise is eliminated in the fourth silencer pipe after being gradually weakened.

[0085] The present invention provides a working method of a silencing device. When in use, noise enters a first silencing pipe and is divided into several parts by the first silencing pipe, the noise is reduced, and then the noise propagates along the first silencing pipe, and a part of the noise is absorbed by the sound insulation cotton during the process, and then the noise propagates out of the first silencing pipe and is ready to enter the second silencing unit;

[0086] Next, the noise propagates from the first lower silencer pipe and has weakened. At this time, the noise with reduced decibels enters from the second lower silencer pipe. Part of the noise propagates along the first silencer pipe, part of it propagates along the pipe to cancel each other out, and the remaining part is absorbed by the sound insulation cotton. Finally, the weakened noise propagates from the second silencer pipe and is ready to enter the third silencer unit.

[0087] Then, after the noise propagates from the second silencer pipe, it first enters between the second mounting plate and the third mounting plate along the first pipe, and then the noise propagates along the second pipe to between the first mounting plate and the second mounting plate, and finally the noise enters the fourth silencer unit from between the first mounting plate and the second mounting plate along the third pipe.

[0088] In this process, a part of the noise is first absorbed by the sound insulation cotton, and the other part of the noise enters the first pipe from the second silencer unit, and the noise propagates along the second pipe to between the first mounting plate and the second mounting plate. At this time, because the second pipe connects the two sides of the second mounting plate, a part of the noise between the first mounting plate and the second mounting plate enters the fourth silencer unit along the third pipe, and a part of the noise is offset by the noise between the second mounting plate and the third mounting plate, thereby further reducing the noise decibel on the basis of the second silencer unit, and eliminating a part of the noise;

[0089] Finally, the noise propagates from the third silencer unit. When it enters the fourth silencer pipe, the direction of noise propagation changes due to the inclined setting of the fourth silencer pipe. At this time, the noise is offset at the mouth of the fourth silencer pipe. After entering the fourth silencer pipe, it is absorbed by the sound insulation cotton. The noise is eliminated in the fourth silencer pipe after being gradually weakened.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A silencing device, characterized in that: It comprises: a shell, and a first silencer unit, a second silencer unit, a third silencer unit, and a fourth silencer unit which are sequentially installed in the shell at intervals; The first muffler unit is installed at one end of the housing, and the fourth muffler unit is installed at the other end of the housing. The second muffler unit and the third muffler unit are located between the first muffler unit and the fourth muffler unit; The noise enters from the first silencer unit, passes through the second silencer unit, the third silencer unit and the fourth silencer unit in sequence, and is finally eliminated in the fourth silencer unit; The first muffler unit comprises: a first mounting seat, glass wool and a plurality of first muffler pipes; The first mounting seat is embedded in the front end of the housing, and a plurality of first mounting holes are formed through the first mounting seat. The first silencer pipe is sleeved in the first mounting hole, and the glass wool is filled in the first silencer pipe; The second muffler unit comprises: a second mounting seat, glass wool and a plurality of second muffler pipes; The second mounting seat is embedded in the housing, and a plurality of second mounting holes are formed through the second mounting seat. The second silencer pipe is sleeved in the second mounting hole, the second silencer pipes are connected in sequence through pipes, and the glass wool is filled in the second silencer pipe; The third muffler unit comprises: a third mounting seat, a third muffler pipe and glass wool; The third mounting seat comprises: a first mounting plate, a second mounting plate and a third mounting plate; The first mounting plate, the second mounting plate and the third mounting plate are sequentially embedded in the housing at intervals, wherein the first mounting plate is arranged close to the second muffler unit; The third muffler pipe comprises: a first pipe, a plurality of second pipes and a plurality of third pipes; The first pipe is plugged into the first mounting plate and the second mounting plate. One end of the first pipe passes through the first mounting plate, and the other end of the first pipe passes through the second mounting plate; The second pipe is plugged into the second mounting plate. One end of the second pipeline is located between the first mounting plate and the second mounting plate, and the other end of the second pipeline is located between the second mounting plate and the third mounting plate; The third pipe is plugged into the second mounting plate and the third mounting plate. One end of the third pipeline passes through the second mounting plate, and the other end of the third pipeline passes through the third mounting plate; The glass wool is filled in the first pipe, the second pipe and the third pipe respectively; The fourth muffler unit comprises: a fourth mounting seat, glass wool and a plurality of fourth muffler pipes; The fourth mounting seat is embedded in the rear end of the shell, and a plurality of silencer holes are penetrated through the fourth mounting seat. The fourth silencer pipe is sleeved in the silencer holes, and the glass wool is filled in the fourth silencer pipe.

2. The silencing device according to claim 1, characterized in that: The cross section of the second silencer pipe is in an isosceles trapezoidal shape, wherein the large diameter end of the second silencer pipe is close to the first silencer unit.

3. The silencing device according to claim 1, characterized in that: A plurality of grooves are arranged on the inner wall of the second muffler pipe, and the grooves are in a spiral shape.

4. The silencing device according to claim 1, characterized in that: The first pipe diameter is larger than the second pipe diameter, and the second pipe diameter is smaller than the third pipe diameter.

5. The silencing device according to claim 1, characterized in that: The fourth silencer pipe is an elliptical pipe, the cross section of the silencer hole is elliptical, and the silencer hole is obliquely arranged on the fourth mounting seat.

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