Outlet silencer for screw blower

Abstract

A first partition plate (8) and a second partition plate (13) are arranged in an inner barrel (7), a second ventilation pipe (11) is assembled on the second partition plate (13), a second through hole (12) is formed in the second ventilation pipe (11), a first ventilation pipe (9) is assembled on the first partition plate (8), a first through hole (10) is formed in the first ventilation pipe (9), a silencing baffle (19) is installed below the first ventilation pipe (9), and a second through hole (12) is formed in the second ventilation pipe (11). The bottom of the inner barrel (7) is communicated with an air inlet pipe (2) through a first sealing plate (3), the air inlet pipe (2) is connected with an outlet of the screw air blower (1), and the top of the inner barrel (7) is communicated with an air outlet pipe (14) through a second sealing plate (18). According to the device, sound wave energy is gradually attenuated in the transmission process, the sound wave energy can be consumed, sound waves in opposite directions are counteracted, and therefore noise is eliminated, and the device is convenient and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of silencer technology and relates to an outlet silencer for screw blowers. Background Technology

[0002] Screw blowers have a high air volume and pressure ratio, enabling them to provide stable air delivery capabilities with large air volumes and high pressures. Compared to traditional blower units, screw blowers increase air volume; they achieve effective gas compression and transmission through the screw compression principle, resulting in lower energy consumption. Compared to traditional Roots blowers, screw blowers offer superior compression performance with the same energy consumption, contributing to energy conservation and emission reduction.

[0003] Screw blowers generate significant noise during operation, with the noise problem being particularly prominent at the outlet. This noise can interfere with the surrounding environment, and prolonged exposure to high noise levels can lead to hearing loss for operators. Utility Model Content

[0004] In view of the above-mentioned problems in the prior art, this application provides an outlet silencer for a screw blower.

[0005] The technical solution of this utility model is as follows:

[0006] An outlet silencer for a screw blower includes an inner cylinder. Inside the inner cylinder, there is a first partition and a second partition. The second partition is equipped with a second ventilation pipe, which has a second through hole. The first partition is equipped with a first ventilation pipe, which has a first through hole. A silencer baffle is installed below the first ventilation pipe. The bottom of the inner cylinder is connected to an air inlet pipe through a sealing plate, which is connected to the outlet of the screw blower. The top of the inner cylinder is connected to an air outlet pipe through a sealing plate.

[0007] As a preferred embodiment of this utility model: the inner cylinder is covered with sound insulation cotton, and an outer covering plate is provided on the outside of the sound insulation cotton.

[0008] In a preferred embodiment of this utility model: the top of the sealing plate 2 is connected to support column 1 and support column 2, and a rain cover is connected above support column 1 and support column 2.

[0009] In a preferred embodiment of this utility model, the number of sound-absorbing baffles is set to multiple.

[0010] In a preferred embodiment of this utility model, the diameters of the first through hole and the second through hole are equal.

[0011] In a preferred embodiment of this utility model, a first support rod is connected to the right side of the outer cover plate, and a second support rod is connected to the left side of the outer cover plate.

[0012] The beneficial effects of this utility model are:

[0013] This utility model discloses an outlet silencer for a screw blower. The silencer baffle makes the sound wave propagation path tortuous, thereby increasing the propagation distance and time, causing the sound wave energy to gradually attenuate during propagation. When the airflow passes through the first through hole of ventilation pipe one and the second through hole of ventilation pipe two, eddies and friction are generated, which can consume the sound wave energy. A cavity is formed between the first baffle and the second baffle, so that the sound waves in opposite directions are canceled out, thereby achieving the effect of noise elimination, avoiding interference with the surrounding environment, and is convenient and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an outlet silencer for a screw blower according to the present invention.

[0015] In the diagram: 1-Screw blower; 2-Inlet pipe; 3-Sealing plate one; 4-First support rod; 5-Outer cover plate; 6-Sound insulation cotton; 7-Inner cylinder; 8-First partition plate; 9-Ventilation pipe one; 10-First through hole; 11-Ventilation pipe two; 12-Second through hole; 13-Second partition plate; 14-Outlet pipe; 15-Support column one; 16-Rainproof cover; 17-Support column two; 18-Sealing plate two; 19-Silencer baffle; 20-Second support rod. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, an outlet silencer for a screw blower includes an inner cylinder 7. The inner cylinder 7 has a first partition 8 and a second partition 13 inside. The second partition 13 is equipped with a second ventilation pipe 11, which has a second through hole 12. The first partition 8 is equipped with a first ventilation pipe 9, which has a first through hole 10. A silencer baffle 19 is installed below the first ventilation pipe 9. The bottom of the inner cylinder 7 is connected to an air inlet pipe 2 through a sealing plate 3. The air inlet pipe 2 is connected to the outlet of the screw blower 1. The top of the inner cylinder 7 is connected to an air outlet pipe 14 through a sealing plate 18.

[0018] The inner cylinder 7 is covered with sound-insulating cotton 6. The sound-insulating cotton 6 contains a large number of tiny interconnected pores. When sound travels to the sound-insulating cotton, the sound waves enter these pores and repeatedly refract, collide, and consume energy, converting sound energy into heat energy, thereby greatly reducing the penetration of sound and achieving a sound absorption effect. The outer side of the sound-insulating cotton 6 is provided with an outer cover plate 5, which enhances the protective capability. The top of the sealing plate 2 18 is connected to the support column 1 15 and the support column 2 17. A rain cover 16 is connected above the support column 1 15 and the support column 2 17, which can effectively block rainwater. The number of sound-absorbing baffles 19 is set to multiple. The diameter of the first through hole 10 and the second through hole 12 is equal. The right side of the outer cover plate 5 is connected to the first support rod 4, and the left side of the outer cover plate 5 is connected to the second support rod 20, which can provide stable support.

[0019] In summary, the present invention provides an outlet silencer for a screw blower. The silencer baffle 19 makes the propagation path of the sound wave tortuous, thereby increasing the propagation distance and time of the sound wave, causing the sound wave energy to gradually attenuate during propagation. When the airflow passes through the first through hole 10 of the ventilation pipe 1 and the second through hole 12 of the ventilation pipe 2, eddies and friction are generated, which can consume the energy of the sound wave. A cavity is formed between the first partition 8 and the second partition 13, so that the sound waves in opposite directions are canceled out, thereby achieving the effect of eliminating noise and avoiding interference with the surrounding environment.

[0020] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, and for those of ordinary skill in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details.

Claims

1. An outlet muffler for a screw blower, characterized by: The utility model relates to a sound insulation and ventilation device, including inner cylinder (7), the inside of inner cylinder (7) is equipped with first baffle (8) and second baffle (13), second baffle (13) is equipped with ventilation pipe two (11), ventilation pipe two (11) is equipped with second through -hole (12), first baffle (8) is equipped with ventilation pipe one (9), ventilation pipe one (9) is equipped with first through -hole (10), the below of ventilation pipe one (9) is installed silencer baffle (19), the bottom of inner cylinder (7) is connected with air inlet pipe (2) through sealing plate one (3), air inlet pipe (2) is connected with the export of screw rod blower (1), the top of inner cylinder (7) is connected with air outlet pipe (14) through sealing plate two (18).

2. The outlet muffler for a screw blower according to claim 1, characterized in that: The inner cylinder (7) is covered with sound insulation cotton (6), and the outer side of the sound insulation cotton (6) is provided with an outer cladding plate (5).

3. The outlet muffler for a screw blower of claim 1, wherein: The top of the sealing plate two (18) is connected with a support column one (15) and a support column two (17), and the upper parts of the support column one (15) and the support column two (17) are connected with a rain cover (16).

4. The outlet muffler for a screw blower of claim 1, wherein: The number of the silencer baffle (19) is multiple.

5. The outlet muffler for a screw blower of claim 1, wherein: The hole diameters of the first through-hole (10) and the second through-hole (12) are equal.

6. The outlet muffler for a screw blower of claim 2, wherein: The right side of the outer cladding plate (5) is connected with a first support rod (4), and the left side of the outer cladding plate (5) is connected with a second support rod (20).

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