A plug-in muffler installed at the exhaust port of a pneumatic system

Abstract

The present invention discloses a plug-in silencer installed at the exhaust port of a pneumatic system, and relates to the technical field of silencer for pneumatic systems. The present invention includes a pipe joint, which includes an air inlet pipe and a mounting plate. A threaded hole is provided in the center of the mounting plate, and a plurality of exhaust holes connected to the inner cavity of the air inlet pipe are provided on the outer peripheral side of the corresponding threaded hole at circumferential intervals. A first annular groove is provided on the outer peripheral side of the plate surface of the mounting plate away from the air inlet pipe, which corresponds to the plurality of exhaust holes; an exhaust pipe assembly, which includes a plurality of exhaust pipes arranged coaxially with the air inlet pipe, the plurality of exhaust pipes are arranged radially at intervals, and one end of each exhaust pipe is inserted into the first annular groove; an end cover, which includes a second annular groove with an opening facing the first annular groove, and the other end of each exhaust pipe is inserted into the second annular groove; and a fastening screw. After the gas enters the pipe joint, it is initially throttled and decompressed through the exhaust hole, and then throttled and decompressed layer by layer through the outlet holes on the multi-layer exhaust pipes, and discharged into the atmosphere, thereby ultimately achieving the effect of reducing exhaust noise.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic system silencer, and more particularly to a plug-in silencer installed at an exhaust port of a pneumatic system. Background Art

[0002] Pneumatic systems are widely used due to their environmentally friendly, low pipeline flow energy loss, and rapid transmission response. However, they also have drawbacks such as high sealing requirements, high leakage, and high exhaust noise. Existing pneumatic systems often use orifice plates, chambers, and sound-absorbing materials to reduce exhaust noise. Consequently, conventional mufflers are bulky, difficult to install, and require regular replacement of the sound-absorbing material.

[0003] Therefore, how to provide a muffler that is small in size, easy to install, and has low maintenance costs is a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] In view of this, the present invention provides a muffler for a pneumatic system which is small in size, easy to install, and has low maintenance costs.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A plug-in muffler installed at the exhaust port of a pneumatic system, comprising:

[0007] a pipe joint, the pipe joint comprising an air intake pipe and a mounting plate, one end of the air intake pipe being detachably mounted at the exhaust port of the pneumatic system, the surface of the mounting plate being arranged perpendicular to the axial direction of the air intake pipe and connected to the other end of the air intake pipe, the mounting plate having a threaded hole at its center, and a plurality of exhaust holes communicating with the inner cavity of the air intake pipe being circumferentially spaced apart on an outer circumferential side corresponding to the threaded hole, and a first annular groove being formed on an outer circumferential side of a surface of the mounting plate away from the air intake pipe corresponding to the plurality of exhaust holes;

[0008] an exhaust pipe assembly, the exhaust pipe assembly comprising a plurality of exhaust pipes coaxially arranged with the intake pipe, the plurality of exhaust pipes being radially spaced apart and one end of each of the exhaust pipes being inserted into the first annular groove;

[0009] an end cover, wherein the end cover is provided with a second annular groove with a notch arranged opposite to the first annular groove, and the other end of each exhaust pipe is inserted into the second annular groove;

[0010] A fastening screw, wherein the threaded end of the fastening screw passes through the end cover and is threadedly connected in the threaded hole.

[0011] The beneficial effects that can be achieved by the present invention are as follows: after the gas enters the pipe joint, it flows into the inner cavity of the exhaust pipe through multiple exhaust holes and is throttled and decompressed, and then is discharged into the atmosphere after being throttled and decompressed layer by layer through the outlet holes on the multi-layer exhaust pipe, thereby ultimately achieving the effect of reducing exhaust noise.

[0012] Preferably, the air intake pipe includes an air intake section and a diffuser section that are integrally connected, the air intake section can be detachably installed at the exhaust port of the pneumatic system, the mounting plate is fixed to one end of the diffuser section away from the exhaust port of the pneumatic system, and the inner diameter of the diffuser section is larger than the inner diameter of the air intake section.

[0013] The beneficial effects that can be achieved by adopting the technical solution in the previous step are: when the gas enters the diffusion section from the intake section, the gas flow rate decreases due to the change in the inner diameter, achieving the effect of deceleration and noise reduction.

[0014] Preferably, the inner wall diameter of the connection between the diffusion section and the air inlet section gradually increases from the open end to the closed end of the pipe joint.

[0015] The beneficial effects that can be achieved by adopting the technical solution in the previous step are: gradual deceleration and noise reduction.

[0016] Preferably, an external thread is provided on the outer side wall of the air inlet section for threaded connection with the exhaust port of the pneumatic system.

[0017] The beneficial effect that can be achieved by adopting the technical solution in the previous step is that the muffler can be detachably connected to the exhaust port of the pneumatic system.

[0018] Preferably, the cross-section of the outer side wall of the diffusion section is polygonal.

[0019] The beneficial effect that can be achieved by adopting the technical solution in the previous step is that the pipe joint is easy to install at the exhaust port of the pneumatic system.

[0020] Preferably, a plurality of air outlet holes are evenly formed on each of the exhaust pipes, and the apertures of the air outlet holes on the exhaust pipes gradually decrease along the radial direction of the air inlet pipe away from the center thereof.

[0021] The beneficial effects that can be achieved by adopting the technical solution in the previous step are: when the gas is discharged outward, it passes through the outlet holes that are reduced layer by layer, achieving the effect of throttling and emission reduction, and finally is discharged into the atmosphere through the small hole injection, achieving the effect of sound absorption and noise reduction.

[0022] Preferably, sealing gaskets are installed in both the first annular groove and the second annular groove.

[0023] The beneficial effect that can be achieved by adopting the technical solution in the previous step is: preventing leakage from occurring at the connection points at both ends of the exhaust pipe.

[0024] Preferably, a sealing ring is provided at the connection between the fastening screw and the end cover.

[0025] The beneficial effect that can be achieved by adopting the above technical solution is: achieving a sealed connection between the fastening screw and the end cover.

[0026] Preferably, a locking nut is further provided, wherein the locking nut is provided with an external thread, and the locking nut is threadedly connected to the threaded hole and abuts against the tail end of the fastening screw.

[0027] The beneficial effect that can be achieved by adopting the technical solution in the previous step is: the locking nut presses against the fastening screw, further strengthening the connection between the fastening screw and the mounting plate.

[0028] Preferably, a polygonal through hole is provided on the locking nut.

[0029] The beneficial effect that can be achieved by adopting the technical solution in the previous step: facilitating the installation of the locking nut.

[0030] It can be seen from the above technical solution that compared with the prior art, the present invention discloses a plug-in silencer installed at the exhaust port of a pneumatic system. After the gas enters the pipe joint, it is decelerated and noise-reduced in the diffusion section, and throttled and decompressed through multiple exhaust holes to flow into the inner cavity of the exhaust pipe. After that, it is throttled and decompressed layer by layer through the gradually decreasing exhaust holes on the multi-layer exhaust pipe, and then ejected into the atmosphere through small holes, thereby ultimately achieving the effect of reducing exhaust noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the main half-section structure of a plug-in muffler installed at the exhaust port of a pneumatic system provided by the present invention.

[0033] Figure 2 The present invention provides a schematic diagram of a three-dimensional partial cross-sectional structure of a plug-in muffler installed at the exhaust port of a pneumatic system.

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the pipe joint provided by the present invention.

[0035] Figure 4 This is a schematic diagram of the three-dimensional structure of the exhaust pipe assembly provided by the present invention.

[0036] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the end cover provided by the present invention.

[0037] In the figure: 1. Pipe joint, 11. Air intake section, 12. Diffuser section, 13. Mounting plate, 131. Threaded hole, 132. Exhaust hole, 133. First annular groove, 2. Exhaust pipe assembly, 21. Inner exhaust pipe, 22. Outer exhaust pipe, 201. Air outlet, 3. End cover, 31. Second annular groove, 32. Sealing groove, 4. Fastening screw, 5. Sealing gasket, 6. Sealing ring, 7. Locking nut. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] See also Figure 1-Figure 5 The embodiment of the present invention discloses a plug-in muffler installed at the exhaust port of a pneumatic system, comprising:

[0042] The pipe joint 1 includes an air intake pipe and a mounting plate 13. One end of the air intake pipe is detachably mounted at the exhaust port of the pneumatic system. The mounting plate 13 is arranged perpendicular to the axial direction of the air intake pipe and is connected to the other end of the air intake pipe. A threaded hole 131 is formed in the center of the mounting plate 13, and a plurality of exhaust holes 132 communicating with the inner cavity of the air intake pipe are formed at circumferential intervals on the outer side corresponding to the threaded hole 131. A first annular groove 133 is formed on the outer side of the mounting plate 13 away from the air intake pipe, corresponding to the plurality of exhaust holes 132.

[0043] The exhaust pipe assembly 2 includes a plurality of exhaust pipes coaxially arranged with the intake pipe, the plurality of exhaust pipes being radially spaced apart and one end of each of the exhaust pipes being inserted into the first annular groove 133;

[0044] The end cover 3 has a second annular groove 31 formed thereon and arranged opposite to the first annular groove 133 . The other end of each exhaust pipe is inserted into the second annular groove 31 .

[0045] The fastening screw 4 has a threaded end that passes through the end cover 3 and is threadedly connected to the threaded hole 131 .

[0046] The present invention can achieve the beneficial effects that gas flows into the inner cavity of the exhaust pipe from the pipe joint 1 and is discharged after being throttled and decompressed by the multi-layer exhaust pipe, thereby reducing exhaust noise.

[0047] In one embodiment, the intake pipe includes an integrally connected intake section 11 and diffuser section 12. The intake section 11 is detachably mounted at the exhaust port of the pneumatic system. A mounting plate 13 is fixed to the end of the diffuser section 12 away from the exhaust port of the pneumatic system. The inner diameter of the diffuser section 12 is larger than that of the intake section 11. When gas enters the diffuser section 12 from the intake section 11, the change in inner diameter reduces the gas flow rate, thereby reducing speed and noise.

[0048] Specifically, the inner wall diameter of the connection between the diffuser section 12 and the air inlet section 11 gradually increases from the open end to the closed end of the pipe joint 1, thereby gradually slowing down the speed and reducing noise.

[0049] Specifically, an outer wall of the air inlet section 11 is provided with an external thread for threaded connection with the exhaust port of the pneumatic system, so that the muffler can be detachably connected to the exhaust port of the pneumatic system.

[0050] Specifically, the cross section of the outer wall of the diffuser section 12 is polygonal, which facilitates the installation of the pipe joint 1 at the exhaust port of the pneumatic system.

[0051] In one embodiment, each exhaust pipe is uniformly provided with multiple outlet holes 201 along its axial and radial directions. The diameter of the outlet holes 201 decreases gradually as the diameter of the exhaust pipe moves away from the center of the intake pipe. As the gas is discharged, it passes through the gradually decreasing diameter of the outlet holes 201, achieving throttling and emission reduction. It is ultimately ejected through the small holes into the atmosphere, achieving noise reduction.

[0052] like Figure 4As shown, this embodiment illustrates the case where the exhaust pipe assembly includes two exhaust pipes. The exhaust pipe assembly includes an inner exhaust pipe 21 and an outer exhaust pipe 22. The inner cavity of the inner exhaust pipe 21 serves as a first-stage silencer chamber, and the cavity between the outer exhaust pipe 22 and the inner exhaust pipe 21 serves as a second-stage silencer chamber. Gas passes through the first-stage silencer chamber through the outlet port 201 on the inner exhaust pipe 21 after throttling and reducing exhaust gas, and then enters the second-stage silencer chamber. The gas then passes through the outlet port 201 on the outer exhaust pipe 22 after throttling and reducing exhaust gas, and is then discharged into the atmosphere in the form of a jet. The exhaust pipe assembly reduces exhaust noise through a combination of multi-stage throttling and pressure reduction and jetting through the outlet port 201. In other embodiments, the number of exhaust pipes 21 in the exhaust pipe assembly can be set according to actual design conditions.

[0053] In a specific embodiment, sealing gaskets 5 are installed in both the first annular groove 133 and the second annular groove 31 to prevent leakage at the connection points at both ends of the exhaust pipe.

[0054] In a specific embodiment, a sealing groove 32 is provided on the end cover 3 , and a sealing ring 6 is provided in the sealing groove 32 to achieve a sealed connection between the fastening screw 4 and the end cover 3 .

[0055] In a specific embodiment, a locking nut 7 is further provided, which has an external thread. The locking nut 7 is threadedly connected to the threaded hole 131 and abuts against the tail end of the fastening screw 4. The locking nut 7 presses against the fastening screw 4 to strengthen the connection between the fastening screw 4 and the mounting plate 13.

[0056] Specifically, a polygonal through hole is formed on the locking nut 7. In a specific embodiment, the through hole is hexagonal, and the locking nut 7 can be screwed into the threaded hole 131 by using an inner hexagonal wrench.

[0057] Working Principle: After entering the pipe joint 1, gas is decelerated and noise-reduced in the diffuser section 12. It then flows through the exhaust port 131, where it is throttled and decompressed, into the exhaust pipe cavity. It then passes through the progressively smaller outlet ports 201 of the multi-layer exhaust pipe, where it is throttled and decompressed layer by layer, before being ejected into the atmosphere through the outlet ports, ultimately reducing exhaust noise. The present invention combines throttling and decompression with small-hole injection to reduce exhaust noise.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0059] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plug-in muffler installed at the exhaust port of a pneumatic system, characterized in that: include: A pipe joint (1), the pipe joint (1) comprising an air intake pipe and a mounting plate (13), one end of the air intake pipe being detachably mounted at an exhaust port of a pneumatic system, a plate surface of the mounting plate (13) being arranged perpendicular to the axial direction of the air intake pipe and connected to the other end of the air intake pipe, a threaded hole (131) being provided at the center of the mounting plate (13), and a plurality of exhaust holes (132) communicating with an inner cavity of the air intake pipe being provided at circumferential intervals on an outer peripheral side corresponding to the threaded hole (131), and a first annular groove (133) being provided on an outer peripheral side of the mounting plate (13) away from the air intake pipe and corresponding to the plurality of exhaust holes (132); An exhaust pipe assembly (2), the exhaust pipe assembly (2) comprising a plurality of exhaust pipes coaxially arranged with the intake pipe, a plurality of air outlet holes (201) being provided on a side wall of each exhaust pipe, the plurality of exhaust pipes being radially spaced apart and one end of each exhaust pipe being inserted into the first annular groove (133); An end cover (3), wherein the end cover (3) is provided with a second annular groove (31) whose notch is arranged opposite to the first annular groove (133), and the other end of each exhaust pipe is inserted into the second annular groove (31); a fastening screw (4), wherein the threaded end of the fastening screw (4) passes through the end cover (3) and is threadedly connected in the threaded hole (131); The air intake pipe comprises an air intake section (11) and a diffuser section (12) connected in one piece, the air intake section (11) being detachably mounted at the exhaust port of the pneumatic system, the mounting plate (13) being fixed to an end of the diffuser section (12) away from the exhaust port of the pneumatic system, the inner diameter of the diffuser section (12) being larger than the inner diameter of the air intake section (11); the inner wall diameter of the connection between the diffuser section (12) and the air intake section (11) gradually increases from the open end to the closed end of the pipe joint (1); the cross section of the outer wall of the diffuser section (12) is polygonal; A plurality of exhaust pipes are arranged at intervals along the radial direction of the air inlet pipe, and the apertures of the air outlet holes (201) on the exhaust pipes away from the center gradually decrease.

2. A plug-in muffler installed at the exhaust port of a pneumatic system according to claim 1, characterized in that: An external thread is provided on the outer side wall of the air inlet section (11) for threaded connection with the exhaust port of the pneumatic system.

3. The plug-in muffler installed at the exhaust port of a pneumatic system according to claim 1, characterized in that: Sealing gaskets (5) are installed in both the first annular groove (133) and the second annular groove (31).

4. The plug-in muffler installed at the exhaust port of a pneumatic system according to claim 1, characterized in that: A sealing ring (6) is provided at the connection between the fastening screw (4) and the end cover (3).

5. The plug-in muffler installed at the exhaust port of a pneumatic system according to claim 1, characterized in that: A locking nut (7) is also provided. The locking nut (7) is provided with an external thread. The locking nut (7) is threadedly connected in the threaded hole (131) and abuts against the tail end of the fastening screw (4).

6. The plug-in muffler installed at the exhaust port of a pneumatic system according to claim 5, characterized in that: The locking nut (7) is provided with a polygonal through hole.

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