A portable silencer

Abstract

This utility model discloses a portable silencer, relating to the field of exhaust vent noise reduction technology. It includes a primary silencer assembly, a secondary silencer assembly, and a copper silencer connected in sequence. The primary silencer assembly includes a silencer cylinder, inside which multiple sound-absorbing cotton sheets are fixedly installed. A first and a second diameter reducer head are respectively fixedly installed at the front and rear ends of the silencer cylinder via clamps. A first rotary joint is fixedly installed at one end of the first diameter reducer head, and a first pipe joint is fixedly installed at one end of the first rotary joint. One end of the primary silencer assembly can be connected to an exhaust vent on the side or bottom of a valve when a pressure switch is activated. When the exhaust vent is activated, the flowing air passes sequentially through the primary silencer assembly, the secondary silencer assembly, and the copper silencer. The primary silencer assembly, the secondary silencer assembly, and the copper silencer reduce noise by attenuating wind pressure energy through speed reduction, energy consumption, and flow rate control.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for exhaust vents, and in particular to a portable silencer. Background Technology

[0002] A silencer is a device that blocks sound transmission while allowing airflow; it is an important measure to eliminate aerodynamic noise.

[0003] Currently, during the air pressure switch testing process of high-speed trains, high-frequency airflow noise is generated at the valve exhaust port. The most common noise reduction method is to install a separate copper silencer at the exhaust port. However, this method is a one-time noise reduction and still generates some noise, which cannot effectively remove the noise. Therefore, in order to solve the aforementioned problem, we propose a portable silencer. Utility Model Content

[0004] The purpose of this utility model is to address the deficiencies in the existing technology by proposing a portable silencer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A portable silencer includes a primary silencer assembly, a secondary silencer assembly, and a copper silencer connected in sequence.

[0007] The primary silencing component includes a silencer cylinder, inside which multiple sound-absorbing cotton pieces are fixedly installed. At both ends of the silencer cylinder, a reducing head one and a reducing head two are fixedly installed by clamps. A rotary joint one is fixedly installed at one end of the reducing head one, a pipe joint one is fixedly installed at one end of the rotary joint one, and a pipe joint two is fixedly installed at one end of the reducing head two.

[0008] The secondary silencing component includes a sound-absorbing box, inside which is a flexible tube filled with porous foam. One end of the flexible tube is fixedly installed with a rotary joint two, and one end of the rotary joint two is fixedly installed with a pipe joint three. The pipe joint three is adapted to the pipe joint two and connected to the pipe joint two. The other end of the flexible tube is threaded with the copper silencer.

[0009] Furthermore, the sound-absorbing box is constructed by joining two foam boards together, and each of the two foam boards has an installation groove on its opposite side for placing the flexible tube.

[0010] Furthermore, the thickness of each of the aforementioned sound-absorbing cotton sheets is between 1 cm and 0 cm.

[0011] Furthermore, a stainless steel wire frame for fixing the sound-absorbing cotton sheet is fixedly installed inside the silencer.

[0012] Furthermore, the porous foam has airflow channels and several pores inside.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] One end of the primary silencing component of this invention can be connected to an exhaust port on the side or bottom of the plug when the air pressure switch is detected. When the exhaust port is discharging air, the flowing air will pass through the primary silencing component, the secondary silencing component and the copper silencer in sequence. The primary silencing component, the secondary silencing component and the copper silencer will reduce the wind pressure energy and achieve the noise reduction effect through speed reduction, energy consumption and flow rate control. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is one of the exploded views of this utility model;

[0018] Figure 3 This is the second exploded view of this utility model;

[0019] Figure 4 This is a cross-sectional view of a portion of the structure of this utility model.

[0020] In the diagram: 1. Silencer; 2. Clamp; 3. Reducer 1; 4. Reducer 2; 5. Rotary joint 1; 6. Pipe joint 1; 7. Sound-absorbing box; 8. Flexible hose; 9. Copper silencer; 10. Mounting groove; 11. Pipe joint 2; 12. Pipe joint 3; 13. Rotary joint 2; 14. Sound-absorbing cotton sheet; 15. Porous foam. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0022] Reference Figure 1-4A portable silencer includes a primary silencer component, a secondary silencer component, and a copper silencer 9 connected in sequence. One end of the primary silencer component can be connected to an exhaust port on the side or bottom of a stop valve when the air pressure switch is detected. When the exhaust port is venting, the flowing air will pass through the primary silencer component, the secondary silencer component, and the copper silencer 9 in sequence. The primary silencer component, the secondary silencer component, and the copper silencer 9 will reduce the wind pressure energy and achieve noise reduction by means of speed reduction, energy consumption, and flow rate control.

[0023] The primary silencing assembly includes a silencer 1. Multiple sound-absorbing cotton sheets 14 are fixedly installed inside the silencer 1. The thickness of each sound-absorbing cotton sheet 14 is between 2cm and 2.3cm. The front and rear ends of the silencer 1 are respectively fixedly installed with a reducing head 1 3 and a reducing head 2 4 by clamps 2. A rotary joint 1 5 is fixedly installed at one end of the reducing head 1 3. A pipe joint 1 6 is fixedly installed at one end of the rotary joint 1 5. A pipe joint 2 11 is fixedly installed at one end of the reducing head 2 4.

[0024] The primary noise reduction component can be connected to the side or bottom of the plug valve via pipe connector 6. The airflow output from the exhaust port will enter the interior of the silencer 1. The noise reduction cotton pads 14 inside the silencer 1 can effectively consume the airflow energy and reduce the airflow velocity, thereby initially reducing the noise generated by the airflow.

[0025] The muffler 1 has a stainless steel wire frame for fixing the sound-absorbing cotton pieces 14. The stainless steel wire frame can be removed from the inside of the muffler 1. The first diameter head 3 and the second diameter head 4 are fixed by the clamp 2. After the clamp 2 is removed, the first diameter head 3 and the second diameter head 4 can be removed from the muffler 1. At this time, the stainless steel frame can be taken out from the inside of the muffler 1, so that the sound-absorbing cotton pieces 14 of different thicknesses can be replaced according to the noise reduction requirements. The stainless steel wire frame can be designed according to the actual situation. The specific structural shape can be such that it can fix multiple sound-absorbing cotton pieces 14.

[0026] The secondary sound-absorbing component includes a sound-absorbing box 7, inside which is a flexible tube 8. The interior of the flexible tube 8 is filled with porous foam 15, which has airflow channels and several holes. One end of the flexible tube 8 is fixedly installed with a rotary joint 13, and one end of the rotary joint 13 is fixedly installed with a pipe joint 12. The pipe joint 12 is compatible with the pipe joint 11 and is connected to the pipe joint 11. The other end of the flexible tube 8 is threaded with a copper silencer 9.

[0027] The secondary silencer assembly can be quickly connected to the primary silencer assembly via pipe connector 12 to pipe connector 11, enabling rapid assembly and disassembly of the primary and secondary silencers. When the airflow entering the silencer 1 passes through pipe connector 12 and pipe connector 11 into the hose 8, the porous foam 15 inside the hose 8 can effectively divert the gas and reduce the gas flow rate, further reducing noise.

[0028] The sound-absorbing box 7 is made of two foam boards joined together. Each foam board has an installation groove 10 for placing the flexible hose 8 on one side. The sound-absorbing box 7 made of foam board can effectively absorb the noise transmitted from inside the flexible hose 8 and improve the noise reduction effect.

Claims

1. A portable sound attenuator, characterized in that It includes a primary silencing component, a secondary silencing component and a copper silencer connected in sequence (9); The primary silencing component includes a silencing cylinder (1), and multiple sound-absorbing cotton pieces (14) are fixedly installed inside the silencing cylinder (1). A reducing head one (3) and a reducing head two (4) are fixedly installed at the front and rear ends of the silencing cylinder (1) respectively by clamps (2). A rotating joint one (5) is fixedly installed at one end of the reducing head one (3), a pipe joint one (6) is fixedly installed at one end of the rotating joint one (5), and a pipe joint two (11) is fixedly installed at one end of the reducing head two (4). The secondary silencing component includes a sound-absorbing box (7), inside which is a flexible tube (8), and inside which is filled porous foam (15). A rotary joint (13) is fixedly installed at one end of the flexible tube (8), and a pipe joint (12) is fixedly installed at one end of the rotary joint (13). The pipe joint (12) is adapted to the pipe joint (11), and the pipe joint (12) is connected to the pipe joint (11). The copper silencer (9) is threaded onto the other end of the flexible tube (8).

2. A portable silencer according to claim 1, characterised in that The sound-absorbing box (7) is made of two foam boards joined together, and each of the two foam boards has an installation groove (10) for placing the hose (8) on one side.

3. A portable silencer according to claim 1, wherein The thickness of each of the aforementioned sound-absorbing cotton sheets (14) is between 2 cm and 2.3 cm.

4. A portable silencer according to claim 3, characterised in that The silencer (1) is internally fixed with a stainless steel wire frame for fixing the sound-absorbing cotton sheet (14).

5. The portable silencer of claim 1, wherein The porous foam (15) has airflow channels and several holes inside.

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