An intake pipe and a muffler using the same

Abstract

The invention discloses an air inlet pipe and a silencer applied to an air inlet pipe. The air inlet pipe comprises an outer pipe with one end sealed, an inner pipe which is sleeved with the outer pipe in a movably connected manner and is in slippage connection with the outer pipe in the axial direction of the outer pipe and a reset piece arranged between the inner pipe and the outer pipe and used for resetting the inner pipe, and the end, close to the sealed end of the outer pipe, of the inner pipe is arranged in a sealed manner; first through holes are evenly formed in the portion close to the sealed end of the outer pipe in the circumferential direction, second through holes corresponding to the first through holes are formed in the inner pipe, the first through holes and the second through holes are matched to form air outlet holes, and the through holes are gradually increased when the inner pipe moves in the air inlet direction; the size of the air outlet holes of the air inlet pipe can be changed along with changes of tail gas flowing speed, so that the size of the different air outlet holes can be suitable for tail gas at different flowing speed, and the noise reduction performance and the exhaust performance of the tail gas are improved; and through the effect of a flow guide protrusion, part flowing directions of the tail gas can be changed, air flow passing through the air outlet holes can collide, and noise generated by the tail gas can be further reduced.

Description

technical field [0001] The invention relates to the technical field of tail gas noise treatment, more specifically, it relates to an intake pipe and a muffler using the same. Background technique [0002] The muffler is a device that allows airflow to pass through, but can block or reduce sound transmission. It is an important measure to eliminate aerodynamic noise. It can block the propagation of sound waves and allow airflow to pass through. It is an effective tool for noise control. The motorized equipment is generally provided with a muffler, and the muffler is generally arranged behind the exhaust pipe of the motor of the motorized device or the generator. [0003] The existing muffler includes a cylindrical cylinder, one end of the cylinder is provided with an air inlet pipe, and one end of the air inlet pipe inside the cylinder is provided with several small holes along its circumference; one end of the air outlet pipe and one end of the air inlet pipe are located ins...

AI Technical Summary

Problems solved by technology

The diameter of the small hole on the intake pipe of the existing muffler is fixed, but during the operation of the engine, the exhaust gas discharged per unit time is related to the running speed of the engine, so when the engine running speed increases, the amount of exhaust gas discharged per unit time becomes larger , and the size of the small hole on the intake pipe is fixed, the exhaust gas is not discharged smoothly after passing into the intake pipe, and part of the exhaust gas remains in the engine. The gas is not only thinner, but also impure. It contains fuel, air, and combustion exhaust gas. Therefore, when the spark plug is ignited, the flame spreads and burns slowly, and the combustion drags for a long time, forming a "blast", and it is easy to burn the engine. ; If the aperture of the small hole on the intake pipe is set larger at the beginning, the noise reduction effect will be poor, so the aperture size of the small hole is a more important parameter

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