A back muffler

Abstract

The utility model discloses a back type muffler, including installation box, the one side of installation box is provided with docking mechanism, and the inside of installation box is provided with first silencing mechanism, and first silencing mechanism includes installation support, installation mouth and wave shape flow -around pipe, and the outside of first silencing mechanism is provided with second silencing mechanism, and second silencing mechanism includes installation rod, flow guide block and exhaust plate, through being provided with first silencing mechanism and second silencing mechanism, through docking mechanism, muffler is docked with external exhaust equipment, and the airflow enters the inside of muffler through docking mechanism, and the airflow is divided into two parts and enters the inside and outside of wave shape flow -around pipe, and the inside of wave shape flow -around pipe is multistage pressure reducing cavity, can carry out pressure reduction flow -around to the airflow, and through flow guide block and wave shape flow -around pipe cooperation, the airflow is guided multistage, can promote the length of sound wave reflection path, realizes the pertinence attenuation of low frequency, and can reduce the pressure loss of airflow.

Description

Technical Field

[0001] This utility model relates to the field of ventilation silencer technology, and in particular to a U-shaped silencer. Background Technology

[0002] Traditional circular mufflers generally use a single-stage expansion cavity structure to achieve attenuation through sound wave reflection. However, they are insufficient in attenuation of low frequencies. Due to the limited length of the sound wave reflection path, it is difficult to form effective phase cancellation, resulting in poor muffler performance and increased airflow pressure loss. To address these issues, we propose a circular muffler. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a U-shaped muffler.

[0004] The present invention solves its technical problem through the following technical solution: it includes a mounting box, a docking mechanism is provided on one side of the mounting box, a first silencing mechanism is provided inside the mounting box, the first silencing mechanism includes a mounting bracket, the mounting bracket is fixed to one side of the mounting box by bolts, a mounting nozzle is fixed to the inner wall of the mounting bracket, a corrugated flow tube is fixed to one end of the mounting nozzle, and a second silencing mechanism is provided on the outer side of the first silencing mechanism. The second noise reduction mechanism includes a mounting rod, which is fixed to one side of a mounting bracket by bolts. Multiple guide blocks are fixed to the outside of the mounting rod, and an exhaust plate is fixed to one end of the mounting rod. The exhaust plate is fixedly connected to a corrugated flow tube.

[0005] As a further improvement of this utility model, a support frame is fixed to the outside of the mounting box.

[0006] As a further improvement of this utility model, multiple mounting seats are fixed on the outer side of the support frame.

[0007] As a further improvement of this utility model, an end seat is fixed to the end of the mounting box.

[0008] As a further embodiment of this utility model: the docking mechanism includes an installation sleeve, which is fixed to one end of the installation box by bolts. An installation tube is fixed to one side of the installation sleeve, and a docking flange is fixed to one end of the installation tube.

[0009] As a further embodiment of this utility model: a perforated galvanized sleeve is fixed to the inner wall of the mounting box, and a sound-absorbing insulating layer is fixed to the outer side of the perforated galvanized sleeve, and the sound-absorbing insulating layer is fixedly connected to the mounting box.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: by setting up a first silencing mechanism and a second silencing mechanism, the muffler is connected to the external exhaust equipment through the docking mechanism. The airflow enters the muffler through the docking mechanism and is divided into two parts entering the inside and outside of the corrugated flow tube. The inside of the corrugated flow tube is a multi-stage pressure-reducing cavity, which can reduce the pressure of the airflow and allow it to flow around. By cooperating with the guide block and the corrugated flow tube to guide the airflow in multiple stages, the length of the sound wave reflection path can be increased, targeted attenuation of low frequencies can be achieved, and the pressure loss of the airflow can be reduced, thereby improving the noise reduction effect of the muffler. Attached Figure Description

[0011] Figure 1 A schematic diagram of an isometric structure according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of an isometric sectional view of a structure according to an embodiment of the present invention is shown; Figure 3 The present invention provides an embodiment of the present invention. Figure 2 Enlarged structural diagram of part A in the middle; Figure 4 The present invention provides an embodiment of the present invention. Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 A schematic diagram of the front cross-sectional structure according to an embodiment of the present invention is shown; Figure 6 The present invention provides an embodiment of the present invention. Figure 5 Enlarged structural diagram of section C in the middle; Figure 7 A partial structural schematic diagram according to an embodiment of the present invention is shown.

[0012] Legend: 100 Mounting housing, 110 Support frame, 120 Mounting base, 130 End seat, 210 Mounting sleeve, 220 Mounting pipe, 230 Connecting flange, 310 Mounting bracket, 320 Mounting nozzle, 330 Corrugated flow tube, 410 Mounting rod, 420 Flow guide block, 430 Exhaust plate, 440 Perforated galvanized sleeve, 450 Sound-absorbing insulation layer. Detailed Implementation

[0013] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0014] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Please see Figure 1-7 This utility model provides a technical solution: including a mounting box 100, a docking mechanism is provided on one side of the mounting box 100, a first silencing mechanism is provided inside the mounting box 100, the first silencing mechanism includes a mounting bracket 310, the mounting bracket 310 is fixed to one side of the mounting box 100 by bolts, a mounting nozzle 320 is fixed to the inner wall of the mounting bracket 310, a corrugated flow tube 330 is fixed to one end of the mounting nozzle 320, and a second silencing mechanism is provided on the outside of the first silencing mechanism; The second silencing mechanism includes a mounting rod 410, which is fixed to one side of a mounting bracket 310 by bolts. Multiple guide blocks 420 are fixed to the outer side of the mounting rod 410. An exhaust plate 430 is fixed to one end of the mounting rod 410, and the exhaust plate 430 is fixedly connected to a corrugated bypass pipe 330. By providing both a first and a second silencing mechanism, the muffler is connected to an external exhaust device via a docking mechanism. Airflow enters the muffler through the docking mechanism and is divided into two parts, entering the inner and outer sides of the corrugated bypass pipe 330. The corrugated bypass pipe 330 has a multi-stage pressure-reducing cavity, which can reduce the pressure of the airflow and allow it to bypass. The guide blocks 420 and the corrugated bypass pipe 330 work together to guide the airflow in multiple stages, increasing the length of the sound wave reflection path, achieving targeted attenuation of low frequencies, reducing airflow pressure loss, and improving the muffler's noise reduction effect.

[0017] Specifically, a support frame 110 is fixed to the outside of the mounting box 100; the mounting box 100 is securely supported by the support frame 110.

[0018] Specifically, a plurality of mounting seats 120 are fixed on the outer side of the support frame 110; the muffler is installed at the point of use by providing the mounting seats 120.

[0019] Specifically, an end seat 130 is fixed to the end of the mounting box 100; the exhaust end of the mounting box 100 is shielded and protected by the end seat 130.

[0020] Specifically, the docking mechanism includes an installation sleeve 210, which is fixed to one end of the installation housing 100 by bolts. An installation pipe 220 is fixed to one side of the installation sleeve 210, and a docking flange 230 is fixed to one end of the installation pipe 220. By providing the docking mechanism, the docking flange 230 is docked with the exhaust position and fixed by bolts. Gas enters the silencer through the installation pipe 220 and the docking flange 230.

[0021] Specifically, a perforated galvanized sleeve 440 is fixed to the inner wall of the mounting box 100, and a sound-absorbing insulation layer 450 is fixed to the outer side of the perforated galvanized sleeve 440. The sound-absorbing insulation layer 450 is fixedly connected to the mounting box 100. The perforated galvanized sleeve 440 and the sound-absorbing insulation layer 450 work together to absorb sound during exhaust.

[0022] Working principle: During use, the mounting box 100 is securely supported by the support frame 110, the muffler is installed at the point of use by the mounting base 120, the exhaust end of the mounting box 100 is shielded and protected by the end seat 130, and the muffler is installed by connecting flange 230 to the exhaust position and fixed with bolts. Gas enters the muffler through the mounting pipe 220 and connecting flange 230. The airflow is divided into two parts and enters the inside and outside of the corrugated flow tube 330. The inside of the corrugated flow tube 330 is a multi-stage pressure-reducing cavity, which can reduce the pressure of the airflow and make it flow around. The flow guide block 420 and the corrugated flow tube 330 work together to guide the airflow in multiple stages, which can increase the length of the sound wave reflection path, achieve targeted attenuation of low frequencies, and reduce the pressure loss of the airflow. The porous galvanized sleeve 440 and the sound-absorbing insulation layer 450 work together to absorb sound during exhaust.

[0023] Although the present invention discloses embodiments and accompanying drawings, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and accompanying drawings.

Claims

1. A type of rotary silencer, characterized in that, The system includes a mounting housing (100), a docking mechanism on one side of the mounting housing (100), a first silencing mechanism inside the mounting housing (100), the first silencing mechanism including a mounting bracket (310), the mounting bracket (310) being fixed to one side of the mounting housing (100) by bolts, a mounting nozzle (320) being fixed to the inner wall of the mounting bracket (310), a corrugated flow tube (330) being fixed to one end of the mounting nozzle (320), and a second silencing mechanism being provided on the outer side of the first silencing mechanism. The second noise reduction mechanism includes a mounting rod (410), which is fixed to one side of the mounting bracket (310) by bolts. Multiple guide blocks (420) are fixed on the outside of the mounting rod (410), and an exhaust plate (430) is fixed at one end of the mounting rod (410). The exhaust plate (430) is fixedly connected to the corrugated flow tube (330).

2. A rotary silencer according to claim 1, characterized in that, A support frame (110) is fixed to the outside of the mounting box (100).

3. A rotary silencer according to claim 2, characterized in that, Multiple mounting bases (120) are fixed to the outside of the support frame (110).

4. A rotary silencer according to claim 1, characterized in that, An end seat (130) is fixed to the end of the mounting box (100).

5. A rotary silencer according to claim 1, characterized in that, The docking mechanism includes an installation sleeve (210), which is fixed to one end of the installation box (100) by bolts. An installation tube (220) is fixed to one side of the installation sleeve (210), and a docking flange (230) is fixed to one end of the installation tube (220).

6. A rotary silencer according to claim 1, characterized in that, The inner wall of the mounting box (100) is fixed with a perforated galvanized sleeve (440), and a sound-absorbing insulation layer (450) is fixed on the outer side of the perforated galvanized sleeve (440). The sound-absorbing insulation layer (450) is fixedly connected to the mounting box (100).

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