Adjustable silencer for air compressor

Abstract

The utility model provides an adjustable silencer for an air compressor, which comprises a silencer body, and the silencer body comprises a front end cover, a plurality of connecting rings, a plurality of adjustable structures and a rear end cover, the multiple connecting rings and the multiple adjustable structures are connected between the front end cover and the rear end cover at intervals so as to form a silencing inner cavity for airflow to pass through, each adjustable structure comprises an air inlet end and a telescopic end connected with the air inlet end, and the telescopic end is internally provided with an air pressure cavity and communicates with the outside through the air inlet end. The telescopic end and the air inlet end are located inside and outside the silencing inner cavity correspondingly. The interior of the telescopic end communicates with the exterior through the air pressure cavity, when high-speed airflow passes through the silencing inner cavity, the telescopic end can stretch out and draw back along with air pressure changes in the silencing inner cavity, and therefore the effect that low-speed airflow passes through and hinders the high-speed airflow can be achieved, and the energy consumption and silencing effects on the high-speed airflow are achieved; and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressor accessories, in particular to an adjustable muffler for an air compressor. Background Art

[0002] In the related art, the silencer structure is constructed as a silencer. Among them, the silencer mainly uses structural optimization to hinder the airflow and consume energy to reduce the flow rate of the airflow, thereby reducing the noise generated by the friction between the airflow and the surrounding. In the prior art, the silencer performance of a conventional silencer is affected by its structural dimensions, and once the structural dimensions of the silencer are determined, its silencer band and silencer performance are also fixed, and cannot be actively adjusted according to the operating frequency of the air compressor. At this time, the conventional solution of the prior art is usually to cope with different airflows generated by different operating frequencies through a multi-cavity combination, so as to obtain a better silencer effect. However, when a multi-cavity combination is used to achieve broadband silencer, it is impossible to take into account both the miniaturization of the silencer and the maximization of the silencer effect, so there is room for improvement. Utility Model Content

[0003] Based on this, in order to solve the problem that the muffler in the prior art cannot be adjusted, the utility model provides an adjustable muffler for an air compressor, and its specific technical solution is as follows:

[0004] An adjustable muffler for an air compressor comprises a muffler body, wherein the muffler body comprises a front end cover, a plurality of connecting rings, a plurality of adjustable structures and a rear end cover, wherein the front end cover and the rear end cover both have a through hole at the center, a plurality of connecting rings are connected between the front end cover and the rear end cover at intervals, each of the adjustable structures is respectively connected between two adjacent connecting rings to form a muffler inner cavity for airflow to pass through, the adjustable structure comprises an air inlet end and a telescopic end connected to the air inlet end, the telescopic end has an air pressure cavity inside and is connected to the outside through the air inlet end, and the telescopic end and the air inlet end are respectively located inside and outside the muffler inner cavity.

[0005] The above-mentioned adjustable silencer for an air compressor connects the inside and outside of the telescopic end through an air pressure chamber. When a high-speed airflow passes through the silencer inner chamber, as the air pressure in the silencer inner chamber changes, the telescopic end will expand and contract, thereby enabling the low-speed airflow to pass through and forming an effect of obstructing the high-speed airflow, thereby producing an energy-consuming and silencing effect on the high-speed airflow, and has good practicality.

[0006] Furthermore, the adjustable structure also includes an annular substrate, a plurality of air holes are evenly opened in the circumference of the annular substrate, and the air inlet end and the telescopic end are correspondingly provided with a plurality of holes and are respectively connected to the two ends of the air holes in a one-to-one correspondence.

[0007] Furthermore, an air inlet and an air outlet are sequentially opened on the air inlet end along the air flow direction opposite to the air flow direction in the silencer inner cavity, and the air inlet and the air outlet are both connected to the air pressure cavity.

[0008] Furthermore, the telescopic end is a bellows structure, and one end of the telescopic end away from the air hole is sealed.

[0009] Furthermore, the diameter of the telescopic end decreases successively in the radial direction of the silencer inner cavity toward the center of the silencer cavity.

[0010] Furthermore, the silencer body also includes a silencer shell, which is sleeved outside the silencer inner cavity. An exhaust port is provided on the silencer shell, and the exhaust port is provided close to one side of the front end cover. At this time, the air flow direction is to enter the silencer inner cavity along the front end cover, then flow out from the rear end cover into the silencer shell, and flow in the silencer shell along the opposite flow direction to the exhaust port in the silencer inner cavity and flow out from the exhaust port.

[0011] Furthermore, a connecting plate is provided in the air hole, and a gap hole for air flow is provided between the connecting plate and the inner wall of the air hole. A return spring is connected to the side of the connecting plate facing the telescopic end, and the return spring is fixedly connected to one end of the telescopic end.

[0012] Furthermore, a partition is connected to one side of the connecting plate facing the air inlet end, and the partition is arranged between the air inlet and the air outlet. At this time, the airflow direction of the airflow passing through the adjustable structure is: after entering from the air inlet and passing through the gap hole close to the air inlet side, it enters into the air pressure chamber, and then passes through the gap hole close to the air outlet side and flows out from the air outlet.

[0013] Furthermore, the sound-absorbing shell is filled with sound-absorbing cotton.

[0014] Furthermore, the silencer cotton is arranged on the inner wall of the silencer shell, and the thickness of the silencer cotton on the inner wall of the silencer shell corresponding to the rear end cover is twice or more the thickness of the silencer cotton on the gas inner wall of the silencer shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The inside of the telescopic end is connected with the outside through the air pressure cavity. When high-speed airflow passes through the silencer cavity, as the air pressure in the silencer cavity changes, the telescopic end will expand and contract, thereby enabling low-speed airflow to pass through and forming an effect of blocking the high-speed airflow, thereby producing an energy-consuming and silencing effect on the high-speed airflow, which has good practicality.

[0017] 2. By setting up the silencer shell, the flow distance of the airflow discharged from the air compressor in the silencer is increased, and with the adjustable structure, the airflow in the silencer inner cavity can be better resonated and energy consumed according to the airflow in the silencer shell, thereby obtaining a better silencer effect.

[0018] 3. By arranging silencer cotton to absorb energy and silence the airflow in the silencer shell, and at the same time thickening the thickness of the silencer cotton on the inner wall of the silencer shell corresponding to the rear end cover, the impact force of the airflow through the rear end cover on the silencer shell can be effectively dealt with. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0020] Figure 1 It is a structural schematic diagram of an adjustable silencer for an air compressor in an embodiment of the utility model.

[0021] Figure 2 It is a structural schematic diagram of an adjustable muffler for an air compressor in another embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 100, silencer inner cavity; 110, front end cover; 120, connecting ring; 130, air inlet end; 131, air inlet; 132, air outlet; 133, partition; 140, telescopic end; 141, air pressure cavity; 142, return spring; 150, annular base plate; 151, air hole; 152, connecting plate; 153, clearance hole; 160, rear end cover; 200, silencer outer shell; 210, exhaust port; 220, silencer cotton. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] refer to Figure 1 As shown, an adjustable muffler for an air compressor includes a muffler body, wherein the muffler body includes a front cover 110, a plurality of connecting rings 120, a plurality of adjustable structures and a rear cover 160, wherein the front cover 110 and the rear cover 160 are both provided with a through hole at the center, a plurality of connecting rings 120 are connected between the front cover 110 and the rear cover 160 at intervals, each of the adjustable structures is respectively connected between two adjacent connecting rings 120 to form a muffler inner cavity 100 for airflow to pass through, the adjustable structure includes an air inlet end 130 and a telescopic end 140 connected to the air inlet end 130, the telescopic end 140 has an air pressure cavity 141 inside and is connected to the outside through the air inlet end 130, and the telescopic end 140 and the air inlet end 130 are respectively located inside and outside the muffler inner cavity 100.

[0027] The above-mentioned adjustable silencer for an air compressor connects the inside of the telescopic end 140 with the outside through the air pressure chamber 141. When a high-speed airflow passes through the silencer inner chamber 100, as the air pressure in the silencer inner chamber 100 changes, the telescopic end 140 will expand and contract, thereby enabling the low-speed airflow to pass through and forming an effect of obstructing the high-speed airflow, thereby producing an energy-consuming and silencing effect on the high-speed airflow, and has good practicality.

[0028] Specifically, the silencer cavity body is connected to the air compressor. When the air compressor is working, the exhaust gas of the air compressor enters the silencer cavity 100 from the front end cover 110 and goes out through the rear end cover 160.

[0029] In one specific embodiment, the adjustable structure further includes an annular base plate 150, and a plurality of air holes 151 are evenly opened in the circumference of the annular base plate 150, and the air inlet end 130 and the telescopic end 140 are correspondingly provided with a plurality of and are respectively connected to the two ends of the air holes 151 in a one-to-one correspondence. Through this design, the assembly connection of the adjustable structure can be conveniently realized. Figure 1 The figure shows that the adjustable structure has two symmetrically arranged air holes 151, two telescopic ends 140 and two air inlet ends 130, but this number is not limited in the actual production process and can be set according to actual needs. It is preferred to cover the entire annular substrate 150 while ensuring the strength of the connection structure, so as to achieve the maximum sound-absorbing effect. The figure is only for the convenience of observation and understanding.

[0030] refer to Figure 2As shown, in one specific embodiment, an air inlet 131 and an air outlet 132 are sequentially provided on the air inlet end 130 along the air flow direction opposite to that in the muffler inner cavity 100, and the air inlet 131 and the air outlet 132 are both connected to the air pressure chamber 141. The air inlet 131 and the air outlet 132 allow the external air flow to be connected to the air pressure chamber 141, so that the air flow can be better guided into the air pressure chamber 141 according to the air flow direction.

[0031] refer to Figure 1 and Figure 2 As shown, in one specific embodiment, the telescopic end 140 is a bellows structure, and one end of the telescopic end 140 away from the air hole 151 is sealed.

[0032] Preferably, the diameter of the telescopic end 140 decreases in the radial direction of the muffler inner cavity 100 toward the center of the muffler cavity. With the above structure, telescopic effect can be better achieved.

[0033] refer to Figure 2 As shown, in one specific embodiment, the muffler body further includes a muffler housing 200, the muffler housing 200 is sleeved outside the muffler inner cavity 100, an exhaust port 210 is provided on the muffler housing 200, and the exhaust port 210 is provided near the side of the front end cover 110, at this time, the airflow direction is to enter the muffler inner cavity 100 along the front end cover 110, then flow out from the rear end cover 160 into the muffler housing 200, and flow in the muffler housing 200 along the opposite flow direction to the muffler inner cavity 100 to the exhaust port 210 and flow out from the exhaust port 210. By providing the muffler housing 200, the flow distance of the air compressor in the muffler is increased, and with the adjustable structure, the airflow in the muffler inner cavity 100 can be better resonated and consumed according to the airflow in the muffler housing 200, thereby obtaining a better muffler effect.

[0034] refer to Figure 2 As shown, in one specific embodiment, a connecting plate 152 is provided in the air hole 151, and a gap hole 153 for airflow is provided between the connecting plate 152 and the inner wall of the air hole 151, and a return spring 142 is connected to the side of the connecting plate 152 facing the telescopic end 140, and the return spring 142 is fixedly connected to one end of the telescopic end 140. Due to the presence of the return spring 142, the telescopic end 140 can be contracted to expand the airflow when the airflow speed is not high, so as not to hinder the gas discharge. Preferably, the aperture of the gap hole 153 is smaller than the aperture of the air inlet 131 and the air outlet 132.

[0035] refer to Figure 2As shown, in one specific embodiment, the connecting plate 152 is connected to a partition plate 133 on one side facing the air inlet end 130, and the partition plate 133 is arranged between the air inlet 131 and the air outlet 132. At this time, the airflow direction of the airflow passing through the adjustable structure is: after entering from the air inlet 131 and passing through the gap hole 153 close to the side of the air inlet 131, it enters the air pressure chamber 141, and then passes through the gap hole 153 close to the side of the air outlet 132 and flows out from the air outlet 132.

[0036] refer to Figure 2 As shown, in one specific embodiment, the sound-absorbing shell 200 is also filled with sound-absorbing cotton 220.

[0037] Preferably, the sound-absorbing cotton 220 is arranged on the inner wall of the sound-absorbing shell 200, and the thickness of the sound-absorbing cotton 220 on the inner wall of the sound-absorbing shell 200 corresponding to the rear end cover 160 is twice or more the thickness of the sound-absorbing cotton 220 on the gas inner wall of the sound-absorbing shell 200. By arranging the sound-absorbing cotton 220 to absorb energy and silence the airflow in the sound-absorbing shell 200, and at the same time thickening the thickness of the sound-absorbing cotton 220 on the inner wall of the sound-absorbing shell 200 corresponding to the rear end cover 160, the impact force caused by the airflow passing through the rear end cover 160 on the sound-absorbing shell 200 can be effectively dealt with.

[0038] Working principle:

[0039] When the air compressor is working, high-speed airflow will pass through the silencer cavity 100. At this time, since the adjustable structure is a retractable bellows structure and senses the air pressure inside and outside the silencer cavity 100, the air flow speed in the silencer cavity 100 is high and the air pressure is relatively low. Then, under the action of the air pressure difference, the adjustable structure extends radially toward the silencer cavity 100 and toward the central axis, obstructing the flow of air and generating stagnant airflow, which collides with the subsequent high-speed airflow for energy consumption. At the same time, these supplementary high-speed airflows will also hit the telescopic end 140 to exert force on it and make it retract. The unobstructed airflow flows out through the rear end cover 160, and a part of it hits the silencer cotton 220, and the other part continues to flow toward the exhaust port 210 along the shape inside the silencer shell 200, and enters the air inlet 131 of the air inlet end 130 during the flow process. At this time, the airflow direction is to enter the silencer cavity 100 along the front end cover 110 and then flow out from the rear end cover 160 The air in the air pressure chamber 141 is provided with a plurality of retractable ends 140, and the retractable ends 140 are provided with a plurality of retractable ends 141. The retractable ends 140 are provided with a plurality of retractable ends 141, and the retractable ends 140 are provided with a plurality of retractable ends 141. The retractable ends 140 are provided with a plurality of retractable ends 141, and the retractable ends 140 are provided with a plurality of retractable ends 141. The retractable ends 140 are provided with a plurality of retractable ends 141, and the retractable ends 140 are provided with a plurality of retractable ends 141.

[0040] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An adjustable muffler for an air compressor, comprising a muffler body, characterized in that: The muffler body comprises a front end cover (110), a plurality of connecting rings (120), a plurality of adjustable structures and a rear end cover (160); the front end cover (110) and the rear end cover (160) are both provided with a through hole at the center; a plurality of connecting rings (120) are connected between the front end cover (110) and the rear end cover (160) at intervals; each of the adjustable structures is respectively connected between two adjacent connecting rings (120) to form a muffler inner cavity (100) for airflow to pass through; the adjustable structure comprises an air inlet end (130) and a telescopic end (140) connected to the air inlet end (130); the telescopic end (140) has an air pressure cavity (141) inside and is connected to the outside through the air inlet end (130); the telescopic end (140) and the air inlet end (130) are respectively located inside and outside the muffler inner cavity (100).

2. An adjustable muffler for an air compressor according to claim 1, characterized in that: The adjustable structure further comprises an annular base plate (150), a plurality of air holes (151) being evenly arranged in the circumferential direction of the annular base plate (150), and a plurality of air holes (151) being correspondingly arranged at the air inlet end (130) and the telescopic end (140) and being respectively connected to the two ends of the air holes (151) in a one-to-one correspondence.

3. An adjustable muffler for an air compressor according to claim 2, characterized in that: An air inlet (131) and an air outlet (132) are sequentially provided on the air inlet end (130) along an air flow direction opposite to that in the muffler inner cavity (100); the air inlet (131) and the air outlet (132) are both connected to the air pressure cavity (141).

4. An adjustable silencer for an air compressor according to claim 3, characterized in that: The telescopic end (140) is a bellows structure, and one end of the telescopic end (140) away from the air hole (151) is sealed.

5. An adjustable silencer for an air compressor according to claim 4, characterized in that: The diameter of the telescopic end (140) decreases in sequence in the radial direction of the silencer inner cavity (100) toward the center of the silencer cavity.

6. An adjustable silencer for an air compressor according to claim 5, characterized in that: The muffler body further comprises a muffler housing (200), wherein the muffler housing (200) is sleeved outside the muffler inner cavity (100), and an exhaust port (210) is arranged on the muffler housing (200), and the exhaust port (210) is arranged close to one side of the front end cover (110). At this time, the airflow direction is to enter the muffler inner cavity (100) along the front end cover (110), then flow out from the rear end cover (160) into the muffler housing (200), and flow in the muffler housing (200) along the opposite flow direction to that in the muffler inner cavity (100) toward the exhaust port (210) and flow out from the exhaust port (210).

7. An adjustable silencer for an air compressor according to claim 6, characterized in that: A connecting plate (152) is provided in the air hole (151), and a gap hole (153) for air flow to pass through is provided between the connecting plate (152) and the inner wall of the air hole (151). A return spring (142) is connected to a surface of the connecting plate (152) facing the telescopic end (140), and the return spring (142) is fixedly connected to one end of the telescopic end (140).

8. An adjustable silencer for an air compressor according to claim 7, characterized in that: A partition plate (133) is connected to one side of the connecting plate (152) facing the air inlet end (130), and the partition plate (133) is arranged between the air inlet (131) and the air outlet (132). At this time, the airflow direction of the airflow passing through the adjustable structure is: after entering from the air inlet (131), it enters into the air pressure chamber (141) through the gap hole (153) close to the side of the air inlet (131), and then passes through the gap hole (153) close to the side of the air outlet (132) and flows out from the air outlet (132).

9. The adjustable silencer for an air compressor according to claim 7, characterized in that: The sound-absorbing shell (200) is also filled with sound-absorbing cotton (220).

10. An adjustable silencer for an air compressor according to claim 9, characterized in that: The silencer cotton (220) is arranged on the inner wall of the silencer shell (200), and the thickness of the silencer cotton (220) on the inner wall of the silencer shell (200) corresponding to the rear end cover (160) is twice or more than the thickness of the silencer cotton (220) on the gas inner wall of the silencer shell (200).

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