A gas exhaust muffler

Abstract

The utility model relates to a gas exhaust silencer. It includes a cylinder, a first silencer pipe arranged in the cylinder, a second silencer pipe sleeved outside the first silencer pipe, a diverter baffle and a filler. A plurality of through holes are opened on the tube wall of the first and second silencer pipes. The diverter baffles have a plurality of spaced distributions. Fillers are arranged between the outermost diverter baffle and the inner side wall of the cylinder, and between two adjacent diverter baffles. The utility model uses a combined design of diverter baffles and fillers to allow the gas in the cylinder to be diverted and discharged in an orderly manner through a plurality of diverter baffles. On the one hand, the silencer is more sufficient, and on the other hand, the pressure of the exhaust port can be reduced, and the friction between the gas at the exhaust port and the equipment can be reduced, so as to achieve the purpose of reducing noise. The design of the first and second silencer pipes can form a double buffer zone, reduce the rushing speed and gas pressure of the gas from the exhaust pipe, so that the silencer can fully absorb the energy of the gas, and improve the utilization rate of the silencer.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, in particular to a gas exhaust muffler. Background Art

[0002] The noise generated by oxygen or nitrogen generators when exhausting gas mainly comes from air flow vibration and pressure fluctuation. When the exhaust volume is large, the vibration generated when the gas is discharged is transmitted to the equipment, thus generating noise. In order to eliminate these noises, people have developed mufflers.

[0003] In previous research, the applicant developed an exhaust venting muffler, see patent CN207503632U for details, the exhaust venting muffler includes a cylinder with a first opening and a second opening, a primary and a secondary muffler arranged below and above the cylinder, and the secondary muffler includes a secondary sound absorbing layer vertically disposed between the exhaust pipe and the primary muffler. The applicant conducted in-depth research and found that although the exhaust venting muffler discharges gas more smoothly, the gas flow rate is faster when the gas passes through the primary muffler, resulting in insufficient sound absorption when the gas passes through the secondary muffler. Utility Model Content

[0004] The utility model aims to provide a gas exhaust silencer which has a simple structure, smooth gas discharge and more sufficient sound absorption.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A gas exhaust silencer comprises a cylinder having an air inlet and an exhaust port and a muffler pipe assembly arranged in the cylinder and located at the upper end of the cylinder, the muffler pipe assembly comprises a first muffler pipe and a second muffler pipe sleeved on the outside of the first muffler pipe, the first muffler pipe is connected to the air inlet, the upper ends of the first muffler pipe and the second muffler pipe are connected to the upper end of the cylinder and the lower ends thereof are closed, a plurality of through holes are provided on the peripheral side walls of the first muffler pipe and the second muffler pipe, the gas exhaust silencer further comprises a diverter baffle and a filler arranged in the cylinder and located at the lower end of the cylinder, the diverter baffles have a plurality of spaced-apart plates along the left-right direction of the cylinder, the filler is provided between the outermost diverter baffle and the inner side wall of the cylinder and between two adjacent diverter baffles.

[0007] When the gas exhaust silencer of the present application is working, the gas first enters the first silencer pipe through the air inlet before entering the cylinder, and then enters the second silencer pipe for buffering and deceleration after being buffered and decelerated by the first silencer pipe, thereby reducing the rushing speed and gas pressure of the gas from the exhaust pipe. After the gas enters the cylinder, it is orderly diverted by the diverter baffle and then enters the filler before being discharged. The design of the diverter baffle allows the gas entering the cylinder to enter the filler in an orderly manner and be discharged after being silenced and filtered by the filler. While the sound absorption is more sufficient, the pressure of the exhaust port is reduced, thereby reducing the friction between the gas at the exhaust port and the equipment, thereby achieving the purpose of reducing noise.

[0008] Preferably, the upper end of the diverter baffle is higher than the filler.

[0009] Preferably, the flow dividing baffle extends along the axial direction of the cylinder.

[0010] Preferably, the plurality of flow diversion baffles are symmetrically arranged.

[0011] Preferably, a lower cover plate is provided at the lower end of the cylinder, and a plurality of through-going exhaust holes are opened on the lower cover plate.

[0012] Further preferably, the exhaust hole extends along the axial direction of the cylinder.

[0013] Preferably, the aperture of the exhaust hole is smaller than the aperture of the through hole of the second muffler pipe and smaller than the aperture of the through hole of the first muffler pipe.

[0014] Preferably, the gas exhaust silencer further comprises a supporting partition plate arranged between the second silencer pipe and the lower end portion of the cylinder, and the filler is arranged between the diverter partition plate and the supporting partition plate.

[0015] Further preferably, the supporting partition is located in the middle area of ​​the lower end of the cylinder.

[0016] Preferably, the gas exhaust silencer further comprises sound-absorbing cotton arranged on the inner side wall and the upper side wall of the cylinder.

[0017] Preferably, the first muffler pipe, the second muffler pipe and the cylinder are coaxial.

[0018] Preferably, a plurality of groups of through holes are formed on the peripheral side wall of the first muffler, the plurality of groups of through holes of the first muffler are evenly distributed in the up and down direction and each group of through holes includes a plurality of first through holes, and the plurality of first through holes are evenly distributed around the axis of the first muffler.

[0019] Preferably, a plurality of groups of through holes are formed on the peripheral side wall of the second muffler, the plurality of groups of through holes of the second muffler are evenly distributed in the up and down direction and each group of through holes includes a plurality of second through holes, and the plurality of second through holes are evenly distributed around the axis of the second muffler.

[0020] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0021] The utility model adopts the combined design of the diversion baffle and the filler, so that the gas in the cylinder is orderly diverted and discharged through the multiple diversion baffles. On the one hand, the silencer is more sufficient, and on the other hand, the pressure at the exhaust port can be relieved, and the friction between the gas at the exhaust port and the equipment can be reduced, so as to achieve the purpose of reducing noise. The design of the first and second silencer pipes can form a double buffer zone, reduce the rushing speed and gas pressure of the gas from the exhaust pipe, so that the silencer can fully absorb the energy of the gas, and improve the utilization rate of the silencer.

[0022] The muffler of the utility model has a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the muffler of Example 1;

[0024] Figure 2 for Figure 1 Section view along line AA;

[0025] Figure 3 for Figure 1 Sectional view along line BB;

[0026] Among them, 1, cylinder; 11, upper cover plate; 12, lower cover plate; 121, exhaust hole;

[0027] 2. First muffler; 21. First through hole; 22. First cover;

[0028] 3. Second muffler pipe; 31. Second through hole; 32. Second sealing cover;

[0029] 4. Diverter baffle;

[0030] 5. Filling;

[0031] 6. Support the partition;

[0032] 7. Sound-absorbing cotton;

[0033] 8. Inlet pipe; 81. Flange. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0035] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0036] In the description of the embodiments of the present invention, it should be understood that the descriptions of up and down, left and right, front and back, inside and outside, etc. in this document are based on Figure 1 The direction is defined.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] Example 1

[0041] A gas exhaust silencer comprises a cylinder 1 and a silencer pipe assembly, a flow dividing baffle 4 and a filler 5 arranged in the cylinder 1.

[0042] The cylinder 1 comprises a main body and an upper cover plate 11 and a lower cover plate 12 connected to the upper and lower ends of the main body, and an air inlet and an air outlet are respectively provided on the upper cover plate 11 and the lower cover plate 12, and the air inlet is located in the middle area of ​​the upper cover plate 11. The cylinder 1 is preferably cylindrical, and more preferably cylindrical.

[0043] The muffler assembly includes a first muffler 2 having one end inserted in the air inlet and connected to the air inlet, and a second muffler 3 sleeved on the outside of the first muffler 2, and the first muffler 2, the second muffler 3 and the cylinder 1 are coaxial. A plurality of through-hole groups uniformly arranged in the up-down direction are provided on the peripheral side wall of the first muffler 2, and each through-hole group of the first muffler 2 includes a plurality of first through-holes 21 uniformly arranged around the axis of the first muffler 2. A first cover 22 that is roughly hemispherical is provided at the lower end of the first muffler 2. The second muffler 3 is similar to the first muffler 2, and a plurality of through-hole groups uniformly arranged in the up-down direction are provided on the peripheral side wall of the second muffler 2, and each through-hole group of the second muffler 3 includes a plurality of second through-holes 31 uniformly arranged around the axis of the second muffler 3. Preferably, the aperture of the second through-hole 31 is less than the aperture of the first through-hole 21. A second sealing cover 32 which is roughly hemispherical is provided at the lower end of the second muffler pipe 3 . The second sealing cover 32 is rigidly connected to the first sealing cover 22 and is used to resist the impact of the gas entering the muffler from the intake pipe 8 .

[0044] There is a gap between the inner wall of the second muffler 3 and the outer wall of the first muffler 2 to buffer and slow down the gas entering the second muffler 3. Preferably, the inner diameter of the second muffler 3 is 3 to 6 times the inner diameter of the first muffler 2, and more preferably 4 to 5 times. There is also a gap between the second muffler 3 and the inner wall of the cylinder 1 to buffer and slow down the gas entering the cylinder 1. Preferably, the outer diameter of the second muffler 3 accounts for 1 / 2 to 3 / 4 of the inner diameter of the cylinder 1, and more preferably 3 / 5 to 3 / 4.

[0045] The diverter baffle 4 is located at the lower end of the cylinder 1, and has multiple diverter baffles 4 spaced apart and distributed along the left and right directions of the cylinder 1. The multiple diverter baffles 4 are symmetrically arranged and extend along the axial direction of the cylinder 1. A filler 5 is arranged between the outermost diverter baffle 4 and the inner side wall of the cylinder 1 and between two adjacent diverter baffles 4. Through the combined design of the diverter baffle 4 and the filler 5, the gas in the cylinder 1 is orderly diverted and discharged through the multiple diverter baffles 4, which can make the noise elimination more sufficient on the one hand, and can reduce the pressure of the exhaust port on the other hand, reduce the friction between the gas at the exhaust port and the equipment, and achieve the purpose of reducing noise.

[0046] In order to further increase the flow-guiding effect of the diverter baffle 4, the upper end of the diverter baffle 4 is higher than the filler 5. The filler 5 is used to absorb sound and filter the exhausted gas. The setting of the filler 5 can fully reduce the noise of the exhausted gas after diversion and can slow down the gas flow rate. It is preferably made of porous material. A plurality of through exhaust holes 121 are provided on the lower cover plate 12 below the filler 5 corresponding to the filler 5 located between the outermost diverter baffle 4 and the inner wall of the cylinder 1 and between two adjacent diverter baffles 4. The aperture of the exhaust hole 121 is less than the aperture of the second through hole 31. The setting of the exhaust hole 121 can further filter the gas and reduce the sound.

[0047] The gas exhaust silencer also includes a support baffle 6 connected between the lower cover plate 12 and the second muffler 3. Since the gas entering the muffler assembly from the exhaust pipe has a large impact force, it is easy to cause the muffler assembly to shake or loosen. The support baffle 6 is provided to support the muffler assembly, thereby reducing the shaking of the muffler assembly and avoiding loosening caused by long-term shaking, so that the connection stability of the muffler assembly is better. Preferably, the support baffle 6 is located in the middle area of ​​the lower end of the cylinder 1 and its thickness is greater than the thickness of the diverter baffle 4. The above-mentioned filler 5 is provided between the support baffle 6 and the diverter baffle 4, and a plurality of through exhaust holes 121 are also provided on the lower cover plate 12 below the filler 5 between the support baffle 6 and the diverter baffle 4.

[0048] The gas exhaust silencer further comprises sound absorbing cotton 7 arranged on the inner side wall of the cylinder 1 and the inner side wall of the upper cover plate 11 .

[0049] The gas exhaust silencer also includes an air intake pipe 8 connected to the upper end of the first silencer pipe 2 and coaxial with the first silencer pipe 2. The air intake pipe 8 extends out of the cylinder body 1 and is connected to a flange 81 at the upper end for connecting to the exhaust pipe at the front end.

[0050] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas exhaust muffler, comprising a cylinder having an air inlet and an air outlet, and a muffler pipe assembly disposed in the cylinder and located at the upper end of the cylinder, the muffler pipe assembly comprising a first muffler pipe and a second muffler pipe sleeved on the outside of the first muffler pipe, the first muffler pipe is connected to the air inlet, the upper ends of the first muffler pipe and the second muffler pipe are connected to the upper end of the cylinder and the lower ends thereof are closed, a plurality of through holes are opened on the peripheral side walls of the first muffler pipe and the second muffler pipe, characterized in that: The gas exhaust silencer also includes a diverter baffle and a filler arranged in the cylinder and located at the lower end of the cylinder. The diverter baffles have multiple spaced apart along the left and right directions of the cylinder, and the filler is provided between the outermost diverter baffle and the inner side wall of the cylinder and between two adjacent diverter baffles.

2. The gas exhaust muffler according to claim 1, characterized in that: The upper end of the diversion baffle is higher than the filler; and / or, The flow dividing baffle extends along the axial direction of the cylinder.

3. The gas exhaust muffler according to claim 1, characterized in that: The plurality of flow dividing baffles are symmetrically arranged.

4. The gas exhaust muffler according to claim 1, characterized in that: A lower cover plate is provided at the lower end of the cylinder, and a plurality of through exhaust holes are opened on the lower cover plate.

5. The gas exhaust muffler according to claim 4, characterized in that: The exhaust hole extends along the axial direction of the cylinder; and / or, The diameter of the exhaust hole is smaller than the diameter of the through hole of the second muffler pipe and smaller than the diameter of the through hole of the first muffler pipe.

6. The gas exhaust muffler according to claim 1, characterized in that: The gas exhaust muffler further includes a supporting baffle plate arranged between the second muffler pipe and the lower end of the cylinder, and the filler is arranged between the diverter baffle plate and the supporting baffle plate.

7. The gas exhaust muffler according to claim 6, characterized in that: The supporting partition is located in the middle area of ​​the lower end of the cylinder.

8. The gas exhaust muffler according to claim 1, characterized in that: The gas exhaust silencer also includes sound-absorbing cotton arranged on the inner side wall and the upper side wall of the cylinder.

9. The gas exhaust muffler according to claim 1, characterized in that: The first muffler pipe, the second muffler pipe and the cylinder are coaxial.

10. The gas exhaust muffler according to claim 1, characterized in that: A plurality of groups of through holes are formed on the peripheral side wall of the first muffler, the plurality of groups of through holes of the first muffler are evenly distributed in the up-down direction and each group of through holes includes a plurality of first through holes, and the plurality of first through holes are evenly distributed around the axis of the first muffler; and / or, A plurality of through holes are formed on the peripheral side wall of the second muffler, the plurality of through holes of the second muffler are evenly distributed in the up-down direction and each group of through holes includes a plurality of second through holes, and the plurality of second through holes are evenly distributed around the axis of the second muffler.

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