Anti-icing silencer

Abstract

The utility model belongs to the technical field of pneumatic diaphragm pump manufacturing, and provides an anti-icing silencer which is characterized in that a silencing cylinder (2) and a sound insulation layer (3) are arranged in a shell (1), and the silencing cylinder (2) is positioned in a boss (9) in the shell (1); sound insulation layers (3) are arranged on the outer side and the bottom surface of the silencing barrel (2); a sealing plate (3) with a drainage hole is arranged at the bottom of the shell (1); exhaust grooves (5) are formed in the side surface of the shell (1); the head of the shell (1) is provided with an R-shaped air inlet (6), and the air inlet (6) is provided with an air hole (7) of which the diameter is smaller than the length of a short axis of the air inlet (6); and a silencing cylinder drain hole (8) is formed in the bottom of the silencing cylinder (2). When the pneumatic pump works, high-pressure air firstly enters from the arc R-shaped air inlet to reduce the impact force of the air on the shell, then passes through the breathable and waterproof silencing barrel and then passes through the sound insulation layer to achieve the silencing effect, and the pneumatic pump does not freeze after being used for a long time and is smooth in exhaust.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic diaphragm pump manufacturing, and in particular relates to an anti-icing muffler. Background Art

[0002] A pneumatic pump is a device powered by air. When the air is released instantly at high pressure, the high-speed flow of gas causes a lot of noise, so a muffler is usually installed on the exhaust port of the pneumatic pump.

[0003] Silencer usually includes metal type and resin type. After using them, it was found that the exhaust port was frozen, blocking the air holes of the muffler, and finally causing poor exhaust of the pneumatic pump, insufficient power until it stopped working. This is because when the air is released instantly at high pressure, the air absorbs the surrounding heat during the expansion process, causing cooling around the exhaust port. The air contains moisture, so the water freezes when it is cold, blocking the air holes in the muffler.

[0004] CN208057376U discloses a muffler for a pneumatic diaphragm pump, wherein a plurality of muffler plates perpendicular to the muffler body are arranged in an axially spaced manner in the muffler body, the muffler plates include a first muffler plate and a second muffler plate, the first muffler plate and the second muffler plate are arranged alternately, the diameter of the first muffler hole is greater than the diameter of the second muffler hole, a sound absorbing layer is arranged between the muffler plate and the muffler body, and the sound absorbing layer is distributed on the inner wall of the muffler body along the axial direction. Its sound absorbing layer is a mesh sound absorbing structure interwoven by hollow glass fiber yarns. When in use, the phenomenon that moisture cannot be discharged well and the exhaust port is frozen occurs.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The utility model provides an anti-icing muffler which can be used for a long time without freezing and can exhaust the air from a pneumatic pump smoothly.

[0007] The anti-icing silencer comprises an outer shell, a silencer and a sound insulation layer are arranged in the outer shell, and the silencer is positioned in a boss in the outer shell; the sound insulation layer is arranged on the outer side and the bottom surface of the silencer; a sealing plate is arranged at the bottom of the outer shell, and the outer shell drainage hole is arranged on the sealing plate; a long strip exhaust groove is arranged on the side of the outer shell; an arc R-shaped air inlet is arranged at the head of the outer shell, and an air hole is arranged at the air inlet; the diameter of the air hole is smaller than the short axis length of the air inlet; and a silencer drainage hole is arranged at the bottom of the silencer.

[0008] By adopting the above technical solution, high-pressure air is first allowed to enter from the arc R-shaped air inlet to reduce the impact of the gas on the outer shell, and then passes through the air-permeable and waterproof silencer. Then the air passes through the sound insulation layer to achieve the sound-absorbing effect. It will not freeze during long-term use, and the pneumatic pump can exhaust smoothly.

[0009] Preferably, the shell is made of aluminum alloy.

[0010] By adopting the above technical solution, the shell is cast from aluminum alloy and has good vibration resistance.

[0011] Preferably, the silencer tube is made of resin.

[0012] By adopting the above technical solution, the silencer is made of resin with high porosity, good air permeability, good shock resistance, and good temperature resistance, but is impermeable.

[0013] Preferably, the wall thickness of the silencer is 2 mm, and the aspect ratio of the silencer is 5:1.

[0014] By adopting the above technical solution, the silencer is designed with a wall thickness of 2mm and a length-to-diameter ratio of 5:1, which is conducive to exhaust. A φ2mm hole is drilled at the bottom for drainage.

[0015] Preferably, the sound insulation layer is made of felt and has a thickness of 4 mm.

[0016] By adopting the above technical solution, the sound insulation layer material adopts 4mm thick felt, which has good air permeability, good sound absorption and good sound insulation effect.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The utility model arranges a silencer and a sound insulation layer in the shell, the silencer is positioned in the boss in the shell, and the sound insulation layer is arranged on the outer side and the bottom surface of the silencer. The high-pressure air is firstly allowed to enter from the arc R-shaped air inlet to reduce the impact force of the gas on the shell, and then passes through the breathable and watertight silencer, and then the air passes through the sound insulation layer to achieve the silencing effect. The air will not freeze during long-term use, and the pneumatic pump can exhaust smoothly.

[0019] 2. The wall thickness of the silencer of the utility model is designed to be 2mm, and the length-to-diameter ratio is 5:1, which is conducive to exhaust.

[0020] 3. The sound insulation layer material of the utility model adopts 4mm thick felt, which has good air permeability, good sound absorption and good sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the structural diagram of the utility model;

[0022] Figure 2 It is a side view of the utility model;

[0023] Figure 3 This is a cross-sectional view of the housing of the utility model;

[0024] Figure 4 This is the structure diagram of the shell of the utility model;

[0025] Figure 5This is the structure diagram of the silencer of the utility model;

[0026] Figure 6 This is a bottom view of the silencer of the utility model.

[0027] Figure numbers: 1. Shell, 2. Muffler, 3. Sealing plate, 4. Drain hole of shell, 5. Exhaust groove, 6. Air inlet, 7. Air hole, 8. Drain hole of muffler, 9. Boss, 10. Exhaust end, 11. Sound insulation layer. DETAILED DESCRIPTION

[0028] like Figure 1 , 2 As shown, the anti-icing silencer includes a shell 1, a silencer 2 and a sound insulation layer 11 are arranged inside the shell 1, and the silencer 2 is positioned in the boss 9 inside the shell 1; the sound insulation layer 11 is arranged on the outside and bottom of the silencer 2; a sealing plate 3 is arranged at the bottom of the shell 1, and a shell drainage hole 4 is arranged on the sealing plate 3; a long strip exhaust groove 5 is arranged on the side of the shell 1; an arc R-shaped air inlet 6 is arranged at the head of the shell 1, and an air hole 7 is arranged at the air inlet 6; the diameter of the air hole 7 is smaller than the short axis length of the air inlet 6; and a silencer drainage hole 8 is arranged at the bottom of the silencer 2. In this application, high-pressure air is first allowed to enter from the arc R-shaped air inlet 6 to reduce the impact of the gas on the shell, and then the air passes through the air-permeable and water-tight silencer 2, and then the air passes through the sound insulation layer 11 to achieve the silencing effect, so that it will not freeze during long-term use, and the pneumatic pump will exhaust smoothly. The sound insulation layer 11 is made of 4mm thick felt, which has good air permeability, good sound absorption and good sound insulation effect.

[0029] like Figure 3 , 4 As shown, the housing 1 is made of aluminum alloy casting, which has good vibration resistance. The exhaust end 10 is connected to the exhaust hole of the pneumatic pump, and the tail is sealed with a steel plate, on which a housing drain hole 4 is opened. The inside of the air inlet of the housing 1 is an arc R, which can reduce the impact of the gas on the housing 1, and then increase the exhaust resistance through the reduced air hole 7, which initially plays a role in silencing. The housing 1 has long exhaust grooves 5 on the front and back.

[0030] like Figure 5 , 6 As shown, the silencer 2 is made of resin with high porosity, good air permeability, good shock resistance, and good temperature resistance, but it is impermeable. The silencer 2 is designed with a wall thickness of 2mm and an aspect ratio of 5:1, which is conducive to exhaust. A φ2mm silencer drainage hole 8 is drilled at the bottom for drainage.

[0031] During assembly, the silencer 2 and the sound insulation material are placed in the housing 1, the silencer 2 is positioned on the boss 9 in the housing 1, and the bottom is sealed with the sound insulation material, so that the silencer 2 can be positioned and not shake under the impact of air, and can also be sealed to allow air to pass through the silencer 2. The sound insulation material is wrapped on the silencer 2, and the sound insulation material is between the housing 1 and the silencer 2. The moisture in the air can be discharged from the drainage hole 4 of the housing through the bottom sound insulation material, and the air is discharged from the exhaust groove 5 of the housing 1 through the silencer 2 and the sound insulation material. After testing, the silencing effect is good and it will not freeze after long-term use.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. An anti-icing muffler, comprising a housing (1), characterized in that: A silencer (2) and a sound insulation layer (11) are arranged in the shell (1), and the silencer (2) is positioned in a boss (9) in the shell (1); a sound insulation layer (11) is arranged on the outer side and the bottom surface of the silencer (2); a sealing plate (3) is arranged at the bottom of the shell (1), and a shell drainage hole (4) is arranged on the sealing plate (3); a long strip-shaped exhaust groove (5) is arranged on the side of the shell (1); an air inlet (6) in the shape of an arc R is arranged at the head of the shell (1), and an air hole (7) is arranged at the air inlet (6); the diameter of the air hole (7) is smaller than the short axis length of the air inlet (6); and a silencer drainage hole (8) is arranged at the bottom of the silencer (2).

2. The anti-icing muffler according to claim 1, characterized in that: The shell (1) is made of aluminum alloy.

3. The anti-icing muffler according to claim 1, characterized in that: The material of the silencer tube (2) is resin.

4. The anti-icing muffler according to claim 1, characterized in that: The wall thickness of the silencer tube (2) is 2 mm.

5. The anti-icing muffler according to claim 1, characterized in that: The length-to-diameter ratio of the silencer (2) is 5:

1.

6. The anti-icing muffler according to claim 1, characterized in that: The material of the sound insulation layer (11) is felt.

7. The anti-icing muffler according to claim 1, characterized in that: The thickness of the sound insulation layer (11) is 4 mm.

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