Water-cooled silencer

Abstract

The utility model provides a water-cooled silencer, which relates to the technical field of sample tests and comprises an outer shell, sound absorption and heat insulation cotton is fixedly connected onto the outer shell, an inner shell is fixedly connected onto one side, far away from the outer shell, of the sound absorption and heat insulation cotton, an installation groove is arranged on the outer shell, and an air inlet is fixedly connected into the installation groove on the outer shell. An air inlet elbow is fixedly connected to the air inlet, a first cavity is fixedly communicated with the air inlet elbow, and a third silencing pipe is fixedly connected into the first cavity. According to the silencer, noise transmission can be effectively reduced through the combination of the internal structure and materials of the silencer, and noise can be effectively reduced at the positions such as the air inlet, the air outlet and the water outlet. Through the design of the sound absorption and heat insulation cotton and the porous silencing pipes, sound waves are absorbed and reflected when penetrating through the structures of all the layers, and therefore noise is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sample testing, in particular to a water-cooled muffler. Background Art

[0002] The muffler is usually directly installed at the tail end of the engine exhaust pipe. It generally adopts an impedance composite muffler structure. The expansion and compression of the gas offset each other's energy to reduce the exhaust noise. At the same time, sound-absorbing materials are laid on the inner surface of the muffler to absorb part of the noise.

[0003] An existing Chinese patent (publication number CN204476537U) discloses a water-cooled silencer, which divides the inner cavity of the silencer shell into a first expansion silencer chamber, a first resonance silencer chamber, a second expansion silencer chamber, a second resonance silencer chamber, a third expansion silencer chamber and a fourth expansion silencer chamber by a partition. The noise passes through the first expansion silencer chamber, the first resonance silencer chamber, the second expansion silencer chamber, the second resonance silencer chamber, the third expansion silencer chamber and the fourth expansion silencer chamber in turn for noise reduction treatment.

[0004] In order to solve the problem of high surface temperature of the muffler and poor exhaust leading to short service life, the above patent constructs a cooling water chamber between the inner shell and the outer shell of the muffler, and utilizes the circulation of cooling water to absorb and take away the heat generated inside the muffler, thereby reducing the temperature of the outer surface;

[0005] However, in actual use, the following deficiencies still exist: although the above-mentioned patent adopts multiple chambers and resonant silencer pipes to reduce noise, these silencer components are limited by physical size and material properties. Ideally, the flow path of the gas inside the silencer should be long enough to ensure that the sound waves are sufficiently attenuated. If the path is too short, the gas passes through quickly and the noise is not sufficiently reduced. If it is too long, it will cause excessive back pressure, affecting engine efficiency. Therefore, the design of the multi-chamber is to take into account the influence of a small amount of back pressure and cannot be set long enough. The silencer effect of the above-mentioned patent is bound to be limited.

[0006] Therefore, the utility model proposes a water-cooled muffler. Utility Model Content

[0007] The purpose of the utility model is to solve the shortcomings of the prior art and provide a water-cooled muffler.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a water-cooled silencer, comprising an outer shell, to which sound-absorbing and heat-insulating cotton is fixedly connected, the side of the sound-absorbing and heat-insulating cotton away from the outer shell is fixedly connected to an inner shell, the outer shell is provided with a mounting groove, an air inlet is fixedly connected in the mounting groove on the outer shell, an air inlet is fixedly connected to the air inlet, the air inlet is fixedly connected to a cavity one, and a silencer pipe three is fixedly connected in the cavity one.

[0009] As a preferred embodiment, there are two mounting grooves on the outer shell, and the mounting groove far away from the air inlet is fixedly connected with an exhaust port. The outer shell is fixedly connected with a water outlet and a water inlet, and the ends of the water outlet and the water inlet far away from the outer shell are arranged in the inner shell.

[0010] The technical effect of adopting the above further solution is: by providing two installation grooves, it is convenient to install the air inlet and the exhaust port.

[0011] As a preferred embodiment, the side of the muffler pipe three away from the cavity one is fixedly connected to the cavity two, and the cavity one and the cavity two are both fixedly connected in the inner shell.

[0012] The technical effect of adopting the above further solution is: after the coolant is input into the inner shell through the water inlet, it wraps the cavity one and the cavity two to achieve the effect of cooling them.

[0013] As a preferred embodiment, the air intake bend pipe is fixedly connected to the inner shell and the sound-absorbing and heat-insulating cotton, the cavity one is fixedly connected with the muffler pipe one, and the cavity two arranged on the muffler pipe three is fixedly connected with the muffler pipe two.

[0014] The technical effect of adopting the above further solution is: the second muffler tube is also immersed in the coolant to achieve a cooling effect on the second muffler tube.

[0015] As a preferred embodiment, partitions are fixedly connected inside the cavity one and the cavity two, and the silencer pipe one and the silencer pipe two are fixedly connected to the partitions inside the cavity one and the cavity two, respectively.

[0016] The technical effect of adopting the above further scheme is: by providing a partition, partition two is welded at the middle position inside cavity two, cavity two is divided into two cavities and the right second cavity, silencer pipe two is welded through cavity one, and the porous side of silencer pipe two is on the left second cavity side. The silencer pipe can absorb and disperse sound waves, thereby reducing the propagation of noise.

[0017] As a preferred implementation, the exhaust elbow is fixedly connected to the inner shell and the sound-absorbing and heat-insulating cotton.

[0018] The technical effect of adopting the above further scheme is: an exhaust elbow is fixedly connected to the exhaust port, and the exhaust elbow is fixedly connected to the inner shell and the sound-absorbing and heat-insulating cotton by setting it, so that the gas exhausted by the engine can be discharged conveniently.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are:

[0020] 1. In the present utility model, the muffler can effectively reduce the propagation of noise through its internal structure and material combination. At the air inlet, exhaust port and water outlet, the sound waves are absorbed and reflected when penetrating each layer of the structure through the design of sound-absorbing and heat-insulating cotton and porous muffler pipes, thereby greatly reducing noise. This design not only reduces the noise level of the equipment when it is working, but also reduces vibration and environmental noise pollution, improves the working efficiency and service life of the equipment, and solves the problem of limited effect of the existing technology in the background technology.

[0021] 2. In the utility model, the design of the muffler allows air and water to pass through while blocking the propagation of sound waves, ensuring that the normal operation of the equipment is not affected by noise. In addition, the muffler is usually made of carbon steel or stainless steel, which has good durability and corrosion resistance, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of a water-cooled muffler provided by the utility model;

[0023] Figure 2 A schematic diagram of the overall cross-sectional structure of a water-cooled muffler provided by the utility model;

[0024] Figure 3 A schematic cross-sectional view of a water-cooled muffler cavity 1 and cavity 2 provided by the utility model;

[0025] Figure 4 The utility model provides a water-cooled muffler furnace cavity two separate cross-sectional schematic diagrams.

[0026] Legend:

[0027] 1. Shell;

[0028] 2. Air inlet; 201. Air inlet elbow;

[0029] 3. Water outlet;

[0030] 4. Cavity 1; 402. Muffler 1;

[0031] 5. Inner shell;

[0032] 6. Cavity 2; 602. Muffler 2;

[0033] 7. Sound-absorbing and heat-insulating cotton;

[0034] 8. Water inlet;

[0035] 9. Exhaust port;

[0036] 901, exhaust elbow;

[0037] 10. Silencer three. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] This embodiment provides a technical solution, such as Figures 1 to 4 As shown, a water-cooled muffler includes an outer shell 1, a sound-absorbing and heat-insulating cotton 7 is fixedly connected to the outer shell 1, an inner shell 5 is fixedly connected to the side of the sound-absorbing and heat-insulating cotton 7 away from the outer shell 1, a mounting groove is provided on the outer shell 1, an air inlet 2 is fixedly connected in the mounting groove on the outer shell 1, an air inlet elbow 201 is fixedly connected to the air inlet 2, a cavity 4 is fixedly connected to the air inlet elbow 201, and a muffler pipe 3 10 is fixedly connected in the cavity 4;

[0040] There are two mounting grooves on the outer shell 1, and the mounting groove far away from the air inlet 2 of the two mounting grooves on the outer shell 1 is fixedly connected to the exhaust port 9, and the outer shell 1 is fixedly connected with the water outlet 3 and the water inlet 8. The ends of the water outlet 3 and the water inlet 8 far away from the outer shell 1 are arranged in the inner shell 5. By providing two mounting grooves, it is convenient to install the air inlet 2 and the exhaust port 9;

[0041] like Figures 1 to 4 As shown, in the utility model, the silencer can effectively reduce the propagation of noise through the combination of its internal structure and materials. At the air inlet 2, exhaust port 9 and water outlet 3, through the design of sound-absorbing and heat-insulating cotton 7 and porous silencer tubes, sound waves are absorbed and reflected when penetrating each layer of the structure, thereby greatly reducing noise. This design not only reduces the noise level of the equipment when it is working, but also reduces vibration and environmental noise pollution, improves the working efficiency and service life of the equipment, and solves the problem of limited effect of the prior art in the background technology.

[0042] Further, such as Figures 1 to 4As shown, the side of the muffler pipe 3 10 away from the cavity 1 4 is fixedly connected to the cavity 2 6, and the cavity 1 4 and the cavity 2 6 are fixedly connected to the inner shell 5. After the coolant is input into the inner shell 5 through the water inlet 8, the cavity 1 4 and the cavity 2 6 are wrapped to achieve the effect of cooling them;

[0043] The air intake elbow 201 is fixedly connected to the inner shell 5 and the sound-absorbing and heat-insulating cotton 7. A silencer pipe 402 is fixedly connected to the cavity 14. A silencer pipe 2 is fixedly connected to the cavity 2 6 arranged on the silencer pipe 3 10. The silencer pipe 2 602 is also immersed in the coolant to achieve a cooling effect on the silencer pipe 2 602.

[0044] The above solution still has the problem that the connection relationship of the muffler pipe 2 602 is not clear. Figures 1 to 4 As shown, both cavity one 4 and cavity two 6 are fixedly connected with partitions, and silencer one 402 and silencer two 602 are fixedly connected with the partitions in cavity one 4 and cavity two 6 respectively. By providing a partition, the partition two is welded at the middle position inside cavity two 6, and cavity two 6 is divided into two cavities and the right second cavity. Silencer two 602 is welded through cavity one 4, and the porous side of silencer two 602 is on the left second cavity side. The silencer can absorb and disperse sound waves, thereby reducing the propagation of noise;

[0045] The exhaust port 9 is fixedly connected with an exhaust elbow 901, which is fixedly connected with the inner shell 5 and the sound-absorbing and heat-insulating cotton 7. By setting the exhaust elbow 901 to be fixedly connected with the inner shell 5 and the sound-absorbing and heat-insulating cotton 7, the gas exhausted by the engine can be discharged.

[0046] Working principle:

[0047] like Figure 1-4As shown: when in use, first connect the air inlet 2 to the engine exhaust pipe, and the partition divides the cavity 1 4 and the cavity 2 6 into two parts, the left cavity and the right cavity, respectively. The high-temperature exhaust gas of the engine quickly rushes into the left cavity through the intake elbow 201. After the high-temperature exhaust gas expands, it passes through the small hole of the muffler 1 402 for the first compression and then enters the right cavity. After the second expansion, it passes through the small hole of the muffler 3 10 for the second compression and then enters the left cavity. After the third expansion, it passes through the small hole of the muffler for the third compression and then enters the right cavity. Finally, after compression, it enters the exhaust elbow 901 and is discharged from the exhaust port 9. The high-temperature gas in the cavity is compressed and expanded, which can The collision of the two cooling elements cancels each other out, reducing the noise while transferring part of the heat to the cooling water through the cavity. The high-temperature gas cools down, the gas pressure decreases, and the noise is reduced. The external water pump draws the circulating cooling water from the water inlet 8 into the inner shell 5, exchanges heat with the intake elbow 201, cavity 1 4, silencer pipe 3 10, cavity 2 6, and exhaust elbow 901, takes away the heat, and reduces part of the noise conducted by the intake elbow 201, cavity 1 4, silencer pipe 3 10, cavity 2 6, and exhaust elbow 901. The inner shell 5 then isolates part of the noise conducted by the circulating cooling water, and reflects and offsets part of the energy in the inner shell 5 to reduce the noise. The sound-absorbing and heat-insulating cotton 7 absorbs part of the noise and isolates part of the heat of the cooling water. The outer shell 1 then isolates part of the noise inside the sound-absorbing and heat-insulating cotton 7, and reflects and offsets part of the energy between the inner shell 5 and the outer shell 1 to reduce the noise. Finally, the sound-absorbing and heat-insulating cotton 7 wrapped on the outside of the muffler body further isolates the transmission of heat and noise.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A water-cooled muffler, comprising a housing (1), characterized in that: The outer shell (1) is fixedly connected with sound-absorbing and heat-insulating cotton (7), and the side of the sound-absorbing and heat-insulating cotton (7) away from the outer shell (1) is fixedly connected with the inner shell (5). The outer shell (1) is provided with a mounting groove, and the mounting groove on the outer shell (1) is fixedly connected with an air inlet (2), and the air inlet (2) is fixedly connected with an air inlet elbow (201), and the air inlet elbow (201) is fixedly connected with a cavity one (4), and a silencer pipe three (10) is fixedly connected in the cavity one (4).

2. A water-cooled muffler according to claim 1, characterized in that: The outer shell (1) has two mounting grooves, and the mounting groove of the two mounting grooves on the outer shell (1) which is away from the air inlet (2) is fixedly connected to an exhaust port (9), and the outer shell (1) is fixedly connected to a water outlet (3) and a water inlet (8), and the ends of the water outlet (3) and the water inlet (8) which are away from the outer shell (1) are arranged in the inner shell (5).

3. A water-cooled muffler according to claim 2, characterized in that: The side of the muffler pipe three (10) away from the cavity one (4) is fixedly connected to the cavity two (6), and the cavity one (4) and the cavity two (6) are both fixedly connected in the inner shell (5).

4. A water-cooled muffler according to claim 3, characterized in that: The air intake elbow (201) is fixedly connected to the inner shell (5) and the sound-absorbing and heat-insulating cotton (7); the cavity one (4) is fixedly connected to the silencer pipe one (402); and the cavity two (6) is fixedly connected to the silencer pipe two (602).

5. A water-cooled muffler according to claim 4, characterized in that: The cavity one (4) and the cavity two (6) are both fixedly connected with partitions, and the silencer pipe one (402) and the silencer pipe two (602) are respectively fixedly connected with the partitions in the cavity one (4) and the cavity two (6).

6. A water-cooled muffler according to claim 2, characterized in that: An exhaust elbow (901) is fixedly connected to the exhaust port (9), and the exhaust elbow (901) is fixedly connected to the inner shell (5) and the sound-absorbing and heat-insulating cotton (7).

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