Plate type fence segmentation and diversion muffler
A muffler and chip technology, applied in mining equipment, earth square drilling, mine/tunnel ventilation, etc., can solve the problems of large resistance loss and difficulty in exceeding the muffler value
Inactive Publication Date: 2010-12-01
彭世雄
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Problems solved by technology
[0002] At present, aerodynamic noise control adopts a resistive muffler, and its noise reduction value is difficult to exceed 35dB(A), and the higher the noise reduction value, the greater the resistance loss (energy consumption)
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Embodiment Construction
[0006] The realization mode of the present invention is to set up a group of sheet-type split flow diversion and noise reduction fences at the corners of the ventilation system. For example figure 1 As shown, it is arranged at the vertical (or horizontal) bend of the main ventilation duct of the subway. It consists of sheet-type diversion sound-absorbing body ①, connecting piece ②, and fixing bolts ③. The sheet-type diversion sound-absorbing body is installed according to the orientation shown in the figure: the sound-absorbing surface is perpendicular to the direction of sound wave transmission (or parallel to the wall at the top of the turn); the end of the split-guide is on the AC oblique line of the turn, and is installed in parallel and staggered according to a certain gap.
[0007] This kind of noise reduction fence composed of sheet-type diversion and sound-absorbing bodies has diversion and diversion effects on both forward and reverse airflows, fully eliminating eddy...
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The invention discloses a plate type fence segmentation and diversion muffler. The muffler comprises a plate type sound absorber, a segmentation and diversion plate, a connection plate and a fixing bolt, wherein the segmentation and diversion plate is arranged on one end of the plate type sound absorber to form a plate type segmentation and diversion sound absorber; the plate type sound absorber is connected and fixed at the corner of an air duct through the connection plate and the fixing bolt; the plate type segmentation and diversion sound absorber is perpendicular or approximately perpendicular to the direction of sound wave propagation; a segmentation and diversion anechoic fence consists of inclined fences and has three functions of insulating, absorbing and eliminating sound wave and higher noise reduction value; and air flow is segmented and diverted, thus fully eliminating the vortex resistance loss of air flow at the corner, and the plate type segmentation and diversion sound absorber has negative resistance. The muffler of the invention can be used to replace the main muffler traditionally arranged on a horizontal or vertical air duct, in particular a large air duct in the subway station, the mine and the like, reduce the wind resistance, save the energy, reduce the cost of the construction project; and the muffler also greatly increases the control performance of noise, ensures the project to reach the standard of environment control and is an ideal energy-saving and environment control device.
Description
Technical field: [0001] The invention relates to the field of aerodynamic noise control, in particular to a sheet-type fence split diversion muffler. technical background: [0002] At present, aerodynamic noise control adopts a resistive muffler, and its noise reduction value is difficult to exceed 35dB(A), and the higher the noise reduction value, the greater the resistance loss (energy consumption). Especially in large-scale ventilation systems such as subways and mines, it is of great value and significance to provide an environmental control device that can greatly increase the noise reduction value and reduce wind resistance, for environmental control, energy saving and lower project cost. Invention content: [0003] The object of the present invention is to provide an energy-saving muffler capable of diverting flow to reduce resistance and having high noise reduction value, which is installed at the bend of the air duct. The self-connected combined structure is adop...
Claims
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IPC IPC(8): E21F1/00
Inventor 彭世雄李树芳尹秋彪彭俊超彭德正
Owner 彭世雄