Silencer with automatic dust discharging function

Abstract

The utility model discloses a silencer with an automatic dust discharging function, which comprises a vertically arranged silencing barrel, an air inlet pipe is fixedly arranged at the bottom end of the silencing barrel, the top end of the air inlet pipe penetrates into the silencing barrel, and first silencing holes are formed in the circumferential side wall of the air inlet pipe; an air outlet pipe is fixedly arranged at the top end of the silencing barrel, the lower end of the air outlet pipe penetrates into the silencing barrel, second silencing holes are formed in the circumferential side wall of the air outlet pipe, and silencing cotton is fixedly arranged at the position, corresponding to the second silencing holes, in the silencing barrel; a venturi tube is fixedly arranged at the bottom end of the interior of the air outlet tube, a dust discharge connecting tube is arranged at the position, corresponding to the venturi tube, of the outer wall of the circumference of the silencing barrel, and a tube opening in the inner side of the dust discharge connecting tube penetrates into the silencing barrel and extends into the venturi tube; the silencer has the advantages that the silencing effect is good, and the dust discharging and removing effects are good; the internal structure of the silencer is simple and stable; and external rainwater and impurities are prevented from entering the silencer, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, in particular to a muffler with an automatic dust removal function. Background Art

[0002] Due to the unique working environment of construction vehicles, the surrounding air is often filled with dust and fine particulate matter. When these particles enter the air filter, they react with the airflow and easily produce abnormal noise, creating a new noise source. These particles can also easily clog the air filter element, reducing its service life. To prevent further noise and extend the life of the air filter element, it is generally necessary to regularly remove particles and other deposits from the air filter through the dust outlet.

[0003] Patent publication number CN203114401U discloses an exhaust gas ejection muffler, which specifically discloses that the dust on the filter element is sucked away by a Venturi tube provided inside the muffler. However, there are problems such as poor silencing effect, poor dust exhaust and dust removal effect, inability to prevent external rainwater and impurities from entering the muffler, and short service life. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a silencer with automatic dust exhaust function, which has good noise reduction effect, can stably and quickly extract and remove particulate impurities from the dust outlet of the air filter, and has good dust exhaust and dust removal effects; the internal structure of the silencer is simple and stable, ensuring the stability of the silencer working in a vibration environment; preventing external rainwater and impurities from entering the interior of the silencer, having a long service life, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a silencer with automatic dust exhaust function, comprising a vertically arranged silencer cylinder body, an air inlet pipe is fixedly provided at the bottom end of the silencer cylinder body, the top end of the air inlet pipe passes through the silencer cylinder body, and a first silencer hole is opened on the circumferential side wall of the portion of the air inlet pipe passing through the silencer cylinder body; an air outlet pipe is fixedly provided at the top end of the silencer cylinder body, the lower end of the air outlet pipe passes through the silencer cylinder body, a second silencer hole is opened on the circumferential side wall of the portion of the air outlet pipe passing through the silencer cylinder body, and a silencer cotton is fixedly provided at a position corresponding to the second silencer hole in the silencer cylinder body; a Venturi tube is fixedly provided at the inner bottom end of the air outlet pipe, and a dust exhaust connecting pipe is provided on the circumferential outer wall of the silencer cylinder body at a position corresponding to the Venturi tube, the inner pipe mouth of the dust exhaust connecting pipe passes through the silencer cylinder body and extends into the Venturi tube, and the inner pipe mouth of the dust exhaust connecting pipe faces vertically upwards.

[0006] Furthermore, the Venturi tube includes a lower cone tube, a straight tube and an upper cone tube arranged in sequence from bottom to top, and the lower cone tube, the straight tube and the upper cone tube are an integrated structure; the inner pipe opening of the dust exhaust connecting pipe extends into the lower cone tube.

[0007] Furthermore, the dust exhaust connecting pipe includes a connecting pipe fixedly arranged on the silencer cylinder, the inner end of the connecting pipe passes through the silencer cylinder and is fixedly provided with a bend pipe, the inner pipe mouth of the bend pipe is vertically upward and is coaxially arranged with the Venturi tube; a fixed bracket is fixed in the lower cone tube, and the inner pipe mouth of the bend pipe is fixed on the fixed bracket.

[0008] Furthermore, the bottom end of the silencer body is an open structure, and a lower end plate is fixedly provided at the bottom end of the silencer body, and the air intake pipe is fixedly provided on the lower end plate; a horizontally arranged partition is fixedly provided at the position at the top of the air intake pipe in the silencer body, and the top of the air intake pipe is fixedly connected to the partition.

[0009] Furthermore, a cover plate is fixedly provided on the top of the air intake pipe, and a vent hole is opened on the partition plate located on the periphery of the corresponding air intake pipe; a connecting flange is fixedly provided on the outer wall of the bottom end of the air intake pipe; a support plate is fixedly provided on the inner upper end of the silencer cylinder, and the silencer cotton is arranged between the support plate and the top wall of the silencer cylinder.

[0010] Furthermore, the aperture of the first muffler hole is larger than the aperture of the second muffler hole.

[0011] Furthermore, a rainproof cap is fixedly provided at the top of the air outlet pipe, and the rainproof cap includes a ring sleeve fixedly provided on the outer wall of the top of the air outlet pipe, and an ear plate is provided on the circumferential side wall of the ring sleeve, and a rain shield is movably connected to the ear plate through a pin shaft.

[0012] Furthermore, the air inlet pipe and the air outlet pipe are both coaxially arranged with the muffler cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the muffler with automatic dust exhaust function filters and silences the low-frequency noise generated by the exhaust gas through the first muffler hole provided on the air inlet pipe and the second muffler hole provided on the air outlet pipe, and because the aperture of the first muffler hole is larger than that of the second muffler hole, the frequency range of eliminating the low-frequency noise can be expanded, and the muffler provided inside the muffler cylinder can filter and silence the high-frequency noise, thereby further improving the muffler effect; when the muffler is working, the negative pressure generated by the venturi tube inside the muffler extracts the particulate impurities from the dust outlet of the air filter, and the particulate impurities are blown away by the airflow inside the muffler The exhaust gas is discharged from the muffler outlet pipe together with the exhaust gas, and the structure of the dust exhaust connecting pipe and the cooperation with the venturi tube can stably and quickly extract and remove the particulate impurities from the air filter dust outlet, and the dust exhaust and dust removal effect is good; the internal structure of the muffler is simple and stable, ensuring the stability of the muffler in a vibrating environment; the structure of the intake pipe and the setting of the partition prevent the particulate impurities in the muffler from entering the engine; the rainproof cap prevents rainwater from flowing into the muffler and causing corrosion to the product, thereby shortening the product life; at the same time, it prevents large particles or impurities from falling into the muffler due to long-term parking and affecting its silencing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a partial enlarged view of the air intake pipe of the utility model;

[0016] Figure 3 This is a partial enlarged view of the venturi tube of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the rain cap of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the utility model when in use.

[0019] In the figure: 1. Silencer cylinder; 101. Lower end plate; 102. Support plate; 103. Partition; 104. Vent; 2. Inlet pipe; 21. First silencing hole; 22. Cover plate; 23. Connecting flange; 3. Exhaust pipe; 31. Second silencing hole; 4. Venturi tube; 41. Lower cone tube; 42. Straight pipe; 43. Upper cone tube; 5. Dust exhaust connecting pipe; 51. Connecting pipe; 52. Bend pipe; 53. Fixed bracket; 6. Rain cap; 61. Ring sleeve; 62. Ear plate; 63. Rain shield; 7. Silencing cotton; 800. Air filter; 900. Engine. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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. Example

[0021] See also Figure 1-5 The utility model provides a technical solution: a muffler with automatic dust exhaust function, comprising a vertically arranged muffler body 1, the bottom end of the muffler body 1 is an open structure, and a lower end plate 101 is fixedly provided at the bottom end of the muffler body 1, an air intake pipe 2 is fixedly provided on the lower end plate 101, the top end of the air intake pipe 2 passes through the muffler body 1, and a first muffler hole 21 is provided on the circumferential side wall of the portion of the air intake pipe 2 passing through the muffler body 1; a horizontally arranged partition 103 is fixedly provided at the position of the top of the air intake pipe 2 in the muffler body 1, and the top of the air intake pipe 2 is fixedly connected to the partition 103; a cover plate 22 is fixedly provided at the top of the air intake pipe 2, and a vent 104 is provided on the partition 103 at the periphery of the corresponding air intake pipe 2;

[0022] An air outlet pipe 3 is fixedly provided at the top of the silencer cylinder 1, and the lower end of the air outlet pipe 3 passes through the silencer cylinder 1. A second silencer hole 31 is opened on the circumferential side wall of the part of the air outlet pipe 3 passing through the silencer cylinder 1, and a silencer cotton 7 is fixedly provided at a position corresponding to the second silencer hole 31 in the silencer cylinder 1; the aperture of the first silencer hole 21 is larger than the aperture of the second silencer hole 31; and the air inlet pipe 2 and the air outlet pipe 3 are both coaxially arranged with the silencer cylinder 1.

[0023] A venturi tube 4 is fixedly provided at the inner bottom end of the air outlet pipe 3. The venturi tube 4 includes a lower cone tube 41, a straight tube 42 and an upper cone tube 43 which are sequentially arranged from bottom to top, and the lower cone tube 41, the straight tube 42 and the upper cone tube 43 are an integrated structure; a dust exhaust connecting pipe 5 is provided on the circumferential outer wall of the muffler body 1 at a position corresponding to the venturi tube 4, and the dust exhaust connecting pipe 5 includes a connecting pipe 51 fixedly arranged on the muffler body 1, the inner end of the connecting pipe 51 passes through the muffler body 1 and is fixedly provided with a bend 52, the inner pipe opening of the bend 52 is vertically upward and extends into the lower cone tube 41, and the inner pipe opening of the bend 52 is coaxially arranged with the venturi tube 4;

[0024] Working principle:

[0025] The air outlet of the engine 900 is connected to the air inlet pipe 2 of the muffler through a pipe, and the dust exhaust port of the air filter 800 is connected to the dust exhaust connecting pipe 5 of the muffler through a pipe.

[0026] After the engine 900 is started normally, the air mixed with impurities is filtered by the air filter 800, and the filtered clean air enters the engine 900. The exhaust gas discharged from the outlet of the engine 900 enters the muffler cylinder 1 through the first muffler hole 21 of the intake pipe 2. The exhaust gas flowing through the first muffler hole 21 flows toward the venturi tube 4 through the vent hole 104. The exhaust gas flowing through the venturi tube 4 is discharged through the outlet pipe 3, and the low-frequency noise generated by the exhaust gas is filtered and silenced by the first muffler hole 21 and the second muffler hole 31. Since the aperture of the first muffler hole 21 is larger than the aperture of the second muffler hole 31, the frequency range of eliminating low-frequency noise can be expanded, and the high-frequency noise is filtered and silenced by the muffler cotton 7, thereby further improving the muffler effect.

[0027] Particulate matter and other sediments are intercepted in the cavity between the filter element and the cylinder of the air filter 800. After a period of accumulation, the particulate matter is collected near the dust outlet under the action of the air flow; when the high-speed and high-pressure exhaust gas inside the silencer cylinder 1 flows through the Venturi tube 4, a negative pressure is generated at the upper cone 43 thereof, and the particulate matter collected at the dust outlet is sucked into the Venturi tube 4 by the negative pressure. When the exhaust gas passes through the narrowest part of the lower cone 41 and the straight tube 42, the exhaust gas is compressed, the flow rate is increased, and the speed of the particulate matter discharge is increased; in addition to producing a noise reduction effect, the silencer cotton 7 also absorbs tiny particles of impurities. The particles that are not absorbed are discharged to the outside of the muffler under the thrust of the exhaust gas, thereby realizing the function of automatically removing the particulate dust inside the air filter 800;

[0028] In practice, not all particulate impurities will be discharged at one time. A small amount of particulate impurities will fall downward inside the silencer cylinder 1. The cover plate 22 and the partition 103 will block the falling particles to prevent the particulate impurities from falling into the exhaust pipe of the engine 900 and prevent the particulate impurities in the muffler from entering the interior of the engine 900. The exhaust gas blown out through the first silencer hole 21 of the intake pipe 2 will blow these falling particulate impurities upward.

[0029] Furthermore, a support plate 102 is fixedly provided at the inner upper end of the silencer cylinder 1, and the silencer cotton 7 is arranged between the support plate 102 and the top wall of the silencer cylinder 1; a connecting flange 23 is fixedly provided on the outer wall of the bottom end of the air intake pipe 2; a fixing bracket 53 is fixedly provided in the lower cone tube 41, and the inner pipe mouth of the bend pipe 52 is fixed on the fixing bracket 53; the silencer cotton 7 is firmly fixed in the silencer cylinder 1 by the support plate 102, and the bend pipe 52 of the dust exhaust connecting pipe 5 is firmly fixed in the venturi tube 4 by the fixing bracket 53; damage to the internal structure of the silencer and the silencer and dust exhaust effects due to vibration generated by the dust exhaust pipe of the silencer and the air filter 800 is avoided.

[0030] Furthermore, a rain cap 6 is fixedly provided at the top of the outlet pipe 3. The rain cap 6 includes a ring sleeve 61 fixedly provided on the outer wall of the top of the outlet pipe 3. An ear plate 62 is provided on the circumferential side wall of the ring sleeve 61. A rain shield 63 is movably connected to the ear plate 62 via a pin. The airflow discharged from the outlet pipe 3 will push the rain shield 63 open, thereby allowing the exhaust gas and particulate impurities after silence to be discharged. After the exhaust process is completed, the rain shield 63 of the rain cap 6 will automatically fall to the outlet of the outlet pipe 3 under the action of gravity, preventing rainwater from entering the interior of the muffler, avoiding corrosion of the product caused by rainwater flowing into the interior of the muffler and shortening the product life. At the same time, it prevents large particles or impurities from falling into the interior of the muffler due to long-term parking and affecting its muffler effect.

[0031] The silencer with automatic dust removal function disclosed in this embodiment filters and silences the high-frequency noise generated by the exhaust gas through the first silencer hole 21 provided on the air inlet pipe 2 and the second silencer hole 31 provided on the air outlet pipe 3. Since the aperture of the first silencer hole 21 is larger than the aperture of the second silencer hole 31, the frequency range of eliminating low-frequency noise can be expanded, and the high-frequency noise is filtered and silenced by the silencer cotton 7 provided inside the silencer cylinder 1, thereby further improving the silencer effect. When the silencer is working, the negative pressure generated by the venturi tube 4 inside the silencer draws out the particulate impurities from the dust outlet of the air filter 800, and the particulate impurities are removed from the dust outlet of the air filter 800 along with the exhaust gas through the airflow inside the silencer. The muffler is discharged through the exhaust pipe 3, and through the structure of the dust exhaust connecting pipe 5 and the cooperation with the venturi tube 4, the particulate impurities at the dust exhaust port of the air filter 800 can be stably and quickly extracted and discharged, and the dust exhaust and dust removal effects are good; the internal structure of the muffler is simple and stable, ensuring the stability of the muffler working in a vibration environment; through the structure of the intake pipe 2 and the setting of the partition 103, the particulate impurities in the muffler are prevented from entering the interior of the engine 900; the rainproof cap 6 is used to prevent rainwater from flowing into the interior of the muffler and causing corrosion of the product, thereby shortening the product life; at the same time, it is avoided that large particles or impurities fall into the interior of the muffler due to long-term parking and affect its silencing effect.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A muffler with automatic dust removal function, comprising a vertically arranged muffler cylinder, characterized in that: An air inlet pipe is fixedly provided at the bottom end of the silencer body, and the top end of the air inlet pipe passes through the silencer body, and a first silencer hole is provided on the circumferential side wall of the portion of the air inlet pipe passing through the silencer body; an air outlet pipe is fixedly provided at the top end of the silencer body, and the lower end of the air outlet pipe passes through the silencer body, and a second silencer hole is provided on the circumferential side wall of the portion of the air outlet pipe passing through the silencer body, and a silencer cotton is fixedly provided at a position corresponding to the second silencer hole in the silencer body; a Venturi tube is fixedly provided at the inner bottom end of the air outlet pipe, and a dust exhaust connecting pipe is provided on the circumferential outer wall of the silencer body at a position corresponding to the Venturi tube, the inner pipe mouth of the dust exhaust connecting pipe passes through the silencer body and extends into the Venturi tube, and the inner pipe mouth of the dust exhaust connecting pipe is vertically facing upwards.

2. The muffler with automatic dust removal function according to claim 1, characterized in that: The venturi tube includes a lower cone tube, a straight tube and an upper cone tube which are sequentially arranged from bottom to top, and the lower cone tube, the straight tube and the upper cone tube are an integrated structure; the inner pipe opening of the dust exhaust connecting pipe extends into the lower cone tube.

3. The muffler with automatic dust removal function according to claim 2, characterized in that: The dust exhaust connecting pipe includes a connecting pipe fixedly arranged on the silencer cylinder, the inner end of the connecting pipe passes through the silencer cylinder and is fixedly provided with a bend pipe, the inner pipe opening of the bend pipe is vertically upward and is coaxially arranged with the Venturi tube; a fixing bracket is fixedly provided in the lower cone tube, and the inner pipe opening of the bend pipe is fixed on the fixing bracket.

4. The muffler with automatic dust removal function according to claim 1, characterized in that: The bottom end of the silencer body is an open structure, and a lower end plate is fixedly provided at the bottom end of the silencer body, and the air intake pipe is fixedly provided on the lower end plate; a horizontal partition is fixedly provided at the position at the top of the air intake pipe in the silencer body, and the top of the air intake pipe is fixedly connected to the partition.

5. The muffler with automatic dust removal function according to claim 1, characterized in that: A cover plate is fixedly provided at the top of the air intake pipe, and a vent hole is opened on the partition plate located on the periphery of the corresponding air intake pipe; a connecting flange is fixedly provided on the outer wall of the bottom end of the air intake pipe; a support plate is fixedly provided at the inner upper end of the silencer cylinder, and the silencer cotton is arranged between the support plate and the top wall of the silencer cylinder.

6. The muffler with automatic dust removal function according to claim 1, characterized in that: The aperture of the first muffler hole is larger than the aperture of the second muffler hole.

7. The muffler with automatic dust removal function according to claim 1, characterized in that: A rainproof cap is fixedly provided at the top of the air outlet pipe. The rainproof cap comprises a ring sleeve fixedly provided on the outer wall of the top of the air outlet pipe. An ear plate is provided on the circumferential side wall of the ring sleeve. A rain shield is movably connected to the ear plate through a pin shaft.

8. The muffler with automatic dust removal function according to claim 1, characterized in that: The air inlet pipe and the air outlet pipe are both coaxially arranged with the muffler cylinder.

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