Pressure diaphragm for flow-through device

Abstract

The invention discloses a pressure diaphragm for a flow-through device, which is characterized in that one end face of the disc-shaped diaphragm is engraved with fracture grooves along the diameter ofthe disc, the angles between the adjacent fracture grooves are equal, the length of the fracture grooves is less than the diameter of the disc, the fracture grooves at two sides of the disc center are equal in length, the outer ends of two adjacent fracture grooves are engraved with a rotating groove communicating the two fracture grooves therebetween, the other end face of the disc-shaped diaphragm is provided with a hinge structure along the angular bisector of two fracture grooves on the opposite end face, and a hinge line of the hinge structure is overlapped with the rotating groove on the opposite end face. According to the pressure diaphragm structure disclosed by the invention, fragments formed after the fracture grooves of the diaphragm are torn can still be connected with the whole diaphragm, thereby not generating fragments, not damaging the in-tube structure, and being higher in safety.

Description

technical field [0001] The invention belongs to the technical field of pipeline flow control, in particular to a pressure diaphragm used for a flow-through device. Background technique [0002] At present, in the study of the flow field shape under the condition of high-speed incoming flow, the indirect shadow method, as an important visualization method, provides a strong technical support for its theoretical research. There are complex shock wave systems in the flow field of high-speed incoming flow. The shock wave system will make the density distribution of the flow field uneven. When the light passes through the shock wave structure, it will be refracted and shifted, resulting in shadows, so as to realize the visualization of the flow field. It provides important data for the flow field research under the condition of high-speed incoming flow. However, it can also be seen that this method has extremely high requirements for the quality of the flow field, and the partic...

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Problems solved by technology

[0005] 1. There is a certain time lag between the ignition of gunpowder and the formation of pressure, and the response of channel formation is slow

[0006] 2. The gunpowder combustion method is used to generate pressure, and the pressure controllability is poor

[0007] 3. The post-combustion period and unburned powder particles have a great influence on the quality of the airflow field, which is not conducive to the formation of stable high-speed airflow

[0008] In the Chinese Patent Publication No. 105351586A, a pressure diaphragm with grooves on the surface is proposed to achieve rapid response, but the diaphragm will be broken after being pressed, which is easy to damage the internal structure of the pipeline, and its uncontrollability higher

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