Overflow valve system for railway locomotive

Abstract

The invention relates to the technical field of valves, in particular to an overflow valve system for a railway locomotive. The overflow valve system comprises a pipe allowing the water flow to pass through. The pipe comprises a water inlet and a water outlet, the water inlet is fixedly provided with a first overflow valve body, and a self-closed-type duckbill valve core is fixedly arranged between the first overflow valve body and the side wall of the water inlet. The pipe is internally provided with a blocking block, the portion, located in front of the blocking block, of the pipe side wallis provided with a first opening, the portion, located behind the blocking block, of the pipe side wall is provided with a second opening, the pipe is externally and fixedly provided with a second overflow valve body, and the second overflow valve body is internally provided with a valve cavity for enabling the first opening to communicate with the second opening. The valve cavity is internally provided with a rubber diaphragm, the rubber diaphragm isolates the first opening from the valve cavity and isolates the second opening from the valve cavity, and the side wall of the end, away from therubber diaphragm, of the second overflow valve body is provided with an air-through hole for enabling the valve cavity to communicate with the atmosphere. The pressure difference generated inside andoutside a box body is prevented, dirt discharging is smoother, and deodorization and anti-backwater effects are good.

Description

Technical field [0001] The invention relates to the technical field of valves, in particular to an overflow valve system used in railway locomotives. Background technique [0002] Rubber duckbill valves are often used in the prior art to effectively prevent liquid backflow. At present, because duckbill valves are made of flexible materials, there is a risk of deformation under the action of gas pressure difference during use, and thus cannot prevent liquid backflow. Effect. Summary of the invention [0003] In order to solve the problem of the duckbill valve deforming due to the pressure difference in the prior art, the present invention provides an overflow valve system for railway locomotives that can effectively prevent the pressure difference between the inside and outside of the pipeline and discharge sewage smoothly. [0004] The technical solutions adopted by the present invention to solve its technical problems are: [0005] An overflow valve system used in a railway locomot...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that the duckbill valve will be deformed by the pressure difference, the present invention provides an overflow valve system used in railway locomotives that can effectively prevent the pressure difference between the inside and outside of the pipeline and discharge sewage smoothly.

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