Vent pipe metering orifice device

Abstract

An aeration pipe orifice device, which is connected with an aeration pipe on the base of a thermostat, is characterized in that an orifice block is arranged in the mouth of the aeration pipe. An orifice is processed in the center of the orifice block, the outer diameter transitionally fits the inner diameter of the aeration pipe, thereby resolving the problem. Since the orifice block adopted is in a simple structure, the inner diameter of the orifice on the orifice block added on the designed aeration pipe can be properly adjusted according to the performance requirements, and suitable profiled pipes can be selected according to a connecting pipe to match the outer diameter, thereby realizing the purposes of convenient processing and weight reduction as well as the prevention of leakage in the connection with a rubber pipe.

Description

technical field [0001] The invention relates to a vent pipe measuring hole device in a vehicle engine, in particular to a vent pipe measuring hole device at a thermostat in the engine. Background technique [0002] In the design of the engine water jacket, due to the layout of the whole machine, the outlet of the water jacket is often lower than the highest point of the engine water jacket, and the gas in the water jacket cannot be discharged through the thermostat. Another air hole is opened at the highest point, and the gas drawn here is directly connected to the expansion tank to participate in the large cycle. If the pipe diameter is too large, the water temperature will be low in winter. Generally, the inner diameter of about Ф2 mm can meet the requirements. Due to the limitation of the process, The inner diameter of the rubber tube connected with it cannot be less than 5mm. Although the inner diameter of the nylon tube can be made small, it cannot solve the connection ...

AI Technical Summary

Problems solved by technology

[0002] In the design of the engine water jacket, due to the layout of the whole machine, the outlet of the water jacket is often lower than the highest point of the engine water jacket, and the gas in the water jacket cannot be discharged through the thermostat. Another air hole is opened at the highest point, and the gas drawn here is directly connected to the expansion tank to participate in the large cycle. If the pipe diameter is too large, the water temperature will be low in winter. Generally, the inner diameter of about Ф2 mm can meet the requirements. Due to the limitation of the process, The inner diameter of the rubber tube connected with it cannot be less than 5mm. Although the inner diameter of the nylon tube can be made small, it cannot solve the connection problem. The diameter of the air inlet of the box is Ф8mm)

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