Silencer for exhaust of die-casting machine

Abstract

The utility model relates to the technical field of aluminum alloy hub casting, and discloses a silencer for exhausting of a die-casting machine, which comprises a box body with a closed structure, an air inlet pipe used for being connected with an exhaust hole of the die-casting machine is arranged on the box body, and a partition plate is arranged in the box body. The partition plate is arranged in the box body and divides the box body into two independent cavities including a first silencing cavity and a second silencing cavity, the air inlet pipe penetrates through the box wall and the partition plate and is communicated with the first silencing cavity, a transition air pipe used for communicating the first silencing cavity with the second silencing cavity is arranged on the partition plate in a penetrating mode, and an air outlet pipe used for exhausting air is arranged in the second silencing cavity. According to the utility model, the plurality of silencing cavities are arranged, sound wave interference is fully utilized for silencing, and discontinuous transmission structures are formed through the air pipes arranged in sections, so that sound waves are continuously reflected and mutually interfered through the discontinuous transmission structures, and the purpose of reducing sound is further achieved; the harm to field operation personnel is greatly reduced, and the operation environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy wheel hub casting, in particular to a muffler used for exhaust of a die casting machine. Background Art

[0002] Aluminum alloy wheel hub casting production lines are often accompanied by sharp and piercing noises during die-casting operations, posing a great threat to the occupational health of on-site workers. The diverter cone wind of the die-casting machine is the main source of noise. After the wheel hub blank is die-cast, the high-temperature and high-pressure gas in the mold is discharged through the diverter cone exhaust hole. The noise volume during exhaust can reach 120 decibels, which has always troubled on-site workers. Long-term exposure to a noise environment above 80 decibels can cause deafness in up to 50%, which can easily lead to high blood pressure, heart disease and other diseases.

[0003] Based on this, developing a muffler for die-casting machine exhaust and applying it to actual production is an issue that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a muffler for exhaust of a die-casting machine, so as to improve the noise pollution at the operation site and reduce the harm to the occupational health of the on-site workers.

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

[0006] A silencer for exhaust of a die-casting machine comprises a box body with a closed structure, an air inlet pipe for connecting to an exhaust hole of the die-casting machine is arranged on the box body, a partition is arranged inside the box body, the box body is divided into two independent chambers including a first silencer cavity and a second silencer cavity, the air inlet pipe passes through the box wall and the partition and is connected to the first silencer cavity, a transition air duct for connecting the first silencer cavity and the second silencer cavity is arranged through the partition, an air outlet pipe for exhaust is arranged in the second silencer cavity, the air outlet pipe is connected to the second silencer cavity and passes through the box wall.

[0007] Preferably, a return elbow is connected to the transition air duct, and the return elbow is arranged in the first silencing chamber, and the inlet end of the return elbow is arranged toward the partition.

[0008] Preferably, the air outlet pipe is connected with a Y-shaped connector, and the Y-shaped connector is arranged in the second silencing chamber to collect the airflow in the second silencing chamber.

[0009] Preferably, a baffle is provided in the second silencer chamber to divide the second silencer chamber into two chambers, forming a three-chamber silencer structure with a third silencer chamber, the transition air duct connects the first silencer chamber and the third silencer chamber, and a pressure dividing hole is provided on the baffle to connect the second silencer chamber and the third silencer chamber.

[0010] Preferably, a bevel structure is provided at the front end of the air inlet pipe.

[0011] Preferably, the bevel angle of the bevel structure is preferably 40-60°.

[0012] Preferably, the box wall of the box body is a hollow structure, and the hollow cavity of the box wall is filled with sound-absorbing cotton.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides multiple silencing cavities to fully utilize the interference of sound waves for silencing. The segmented air ducts form a discontinuous transmission structure, so that the sound waves are continuously reflected and interfere with each other through these discontinuous transmission structures, thereby achieving the purpose of reducing the sound. The on-site noise is reduced from 120 decibels to 77 decibels, greatly reducing the harm to on-site workers and improving the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the second embodiment of the utility model.

[0018] In the figure: 1--box body; 11--first silencer chamber; 12--second silencer chamber; 13--third silencer chamber; 14--box wall; 2--air inlet pipe; 21--oblique structure; 3--partition plate; 4--transition air duct; 41--return elbow; 5--air outlet pipe; 51--Y-type joint; 6--baffle; 61--pressure dividing hole; 7--sound-absorbing cotton. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] like Figure 1-2As shown, a muffler for exhaust of a die-casting machine comprises a box body 1 of a closed structure, the box body 1 is provided with an air inlet pipe 2 for connecting to the exhaust hole of the die-casting machine, and a partition 3 is provided inside the box body 1 to separate the box body 1 into two independent chambers including a first muffler chamber 11 and a second muffler chamber 12. The air inlet pipe 2 passes through the box wall 14 and the partition 3 and is connected to the first muffler chamber 11. A transition air duct 4 is provided through the partition 3 to connect the first muffler chamber 11 and the second muffler chamber 12, and an air outlet pipe 5 for exhaust is provided in the second muffler chamber 12, and the air outlet pipe 5 is connected to the second muffler chamber 12 and passes through the box wall 14.

[0021] When in use, the air inlet pipe 2 of the utility model is connected to the exhaust hole of the die-casting machine. When exhausting, the high-temperature and high-pressure mold exhaust gas enters the first silencer chamber 11 of the box body 1 at a high speed through the air inlet pipe 2, and is reflected and interfered with each other in the first silencer chamber 11 to achieve the effect of preliminary silencer. The exhaust gas that has undergone preliminary silencer continues to pass through the transition air duct 4 to enter the second silencer chamber 12, and is reflected and rubbed against each other again in the second silencer chamber 12 to complete the secondary silencer. Finally, it is discharged from the box body 1 through the air outlet pipe 5. This embodiment makes full use of sound wave interference for silencer by setting a plurality of silencer chambers. And a discontinuous transmission structure is formed by the segmented air ducts, so that the sound waves are continuously reflected and interfered with each other through these discontinuous transmission structures, so as to achieve the purpose of reducing the sound.

[0022] As a preferred embodiment, the transition air duct 4 is connected with a return elbow 41, and the return elbow 41 is arranged in the first silencing chamber 11. The inlet end of the return elbow 41 is arranged toward the partition 3, so that the airflow in the first silencing chamber 11 is fully disturbed, interferes with each other, and turns back to enter the transition air duct 4, so as to achieve the purpose of sufficient pressure reduction.

[0023] Preferably, the air outlet pipe 5 is connected with a Y-shaped connector 51, which is arranged in the second silencing chamber 12 and is used to collect the airflow in the second silencing chamber 12. When in use, the Y-shaped connector 51 can collect the airflow in the second silencing chamber 12 into the air outlet pipe 5, further disrupting the airflow to achieve the purpose of silencing.

[0024] As a second embodiment of the present utility model, Figure 2As shown, a baffle 6 is provided in the second silencing chamber 12, which divides the second silencing chamber 12 into two chambers, forming a three-chamber silencing structure with a third silencing chamber 13. The transition air duct 4 connects the first silencing chamber 11 and the third silencing chamber 13. A pressure dividing hole 61 is provided on the baffle 6, which is used to connect the second silencing chamber 12 and the third silencing chamber 13. When in use, the exhaust gas discharged from the mold enters the first silencing chamber 11 through the air inlet pipe 2. After completing the initial silencing, the airflow enters the third silencing chamber 13 through the transition air duct 4, and is reflected and rubbed against each other again in the third silencing chamber 13 to complete the secondary silencing. After the secondary silencing, the airflow will enter the second silencing chamber 12 through the pressure dividing hole 61 on the baffle 6, and after completing the third silencing in the second silencing chamber 12, it will be discharged from the box body 1 through the air outlet pipe 5. The setting of the baffle 6 and the pressure dividing hole 61 in this embodiment produces a flow dividing and pressure dividing effect on the airflow, further reduces the sound energy, and achieves the purpose of further silencing.

[0025] Preferably, the front end of the air inlet pipe 2 is provided with an oblique opening structure 21, so that the high-pressure airflow entering the box body 1 is quickly dispersed to prevent mutual interference. At the same time, the dispersed airflow reduces the direct high-pressure impact on the box wall 14. The bevel angle of the oblique opening structure 21 is preferably 40-60°.

[0026] Preferably, the box wall 14 of the box body 1 is a hollow structure, and the hollow cavity of the box wall 14 is filled with sound-absorbing cotton 7 to further enhance the silencing effect of the silencer.

[0027] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, any deformation made should be regarded as belonging to the protection of the present invention.

Claims

1. A muffler for die casting machine exhaust, characterized in that: The invention comprises a box body (1) of a closed structure, wherein an air inlet pipe (2) for connecting to an exhaust hole of a die-casting machine is arranged on the box body (1), a partition (3) is arranged inside the box body (1) to separate the box body (1) into two independent chambers including a first silencer chamber (11) and a second silencer chamber (12), the air inlet pipe (2) passes through a box wall (14) and the partition (3) and is connected to the first silencer chamber (11), a transition air pipe (4) for connecting the first silencer chamber (11) and the second silencer chamber (12) is passed through the partition (3), and an air outlet pipe (5) for exhaust is arranged inside the second silencer chamber (12), the air outlet pipe (5) is connected to the second silencer chamber (12) and passes through the box wall (14).

2. A muffler for die casting machine exhaust according to claim 1, characterized in that: The transition air duct (4) is connected to a return elbow (41), the return elbow (41) is arranged in the first silencing chamber (11), and the inlet end of the return elbow (41) is arranged toward the partition plate (3).

3. A muffler for die casting machine exhaust according to claim 1, characterized in that: The air outlet pipe (5) is connected to a Y-shaped connector (51), and the Y-shaped connector (51) is arranged in the second silencing chamber (12) and is used to collect the airflow in the second silencing chamber (12).

4. A muffler for die casting machine exhaust according to claim 1, characterized in that: A baffle (6) is provided in the second silencing chamber (12) to divide the second silencing chamber (12) into two chambers, forming a three-chamber silencing structure having a third silencing chamber (13); the transition air duct (4) is connected to the first silencing chamber (11) and the third silencing chamber (13); and a pressure dividing hole (61) is provided on the baffle (6) for connecting the second silencing chamber (12) and the third silencing chamber (13).

5. A muffler for die casting machine exhaust according to claim 1, characterized in that: The front end of the air inlet pipe (2) is provided with an oblique opening structure (21).

6. A muffler for die casting machine exhaust according to claim 5, characterized in that: The bevel angle of the bevel structure (21) is set to 40-60°.

7. A muffler for die casting machine exhaust according to claim 1, characterized in that: The box wall (14) of the box body (1) is a hollow structure, and the hollow cavity of the box wall (14) is filled with sound-absorbing cotton (7).

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