A micro-pressure relief device for high-viscosity liquid

Abstract

The present invention provides a high-viscosity liquid micro-pressure pressure relief device, including a first pressure relief assembly, a second pressure relief assembly and a control assembly, the first pressure relief assembly is used to sense and buffer the pressure fluctuation of the liquid in the medium channel, The control assembly is hinged with the first pressure relief assembly and the second pressure relief assembly. When the pressure in the medium passage increases, the first pressure relief assembly drives the control assembly and the control assembly controls the second pressure relief assembly to make the medium passage and the outside world Connect to pressure relief. The high-viscosity liquid micro-pressure pressure relief device can be effectively applied to the control of the pressure of high-viscosity liquid, especially the pressure control of the high-viscosity reaction liquid formed in the production process of polysulfone resin, and the pressure of the high-viscosity reaction liquid can be controlled at a relatively low pressure. Within a small fluctuation range, the fluctuation of the medium pressure is reduced, the stability of the system control is ensured, and the downstream production process is avoided.

Description

technical field [0001] The invention belongs to the field of process pressure control, and relates to a fluid pressure relief device, in particular to a high-viscosity liquid micro-pressure relief device. Background technique [0002] High heat resistance resins, such as polysulfone resins, polyphenylene sulfide resins, polyether ether ketone resins, polyaryl ether nitrile resins, etc., have excellent heat resistance and good mechanical properties, dielectric properties, corrosion resistance And it can obtain molded products, fibers, films or foam materials by extrusion, injection molding, etc., with good processing performance, and is widely used in aerospace, medical, electrical and electronic, chemical and other fields. [0003] The above-mentioned various resins are usually prepared by polycondensing the raw materials to form a reaction liquid, and then transporting the reaction liquid to the downstream unit for granulation. This type of polycondensation polymerization ...

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Problems solved by technology

The rupture disc is damaged after blasting and cannot be repaired in a short time, affecting normal production

When the safety valve releases pressure, it needs to exceed the set pressure for a certain pressure value to push the safety valve to release the pressure. The pressure stability difference is relatively large, and the traditional safety valve is not specially suitable for high-viscosity fluids, so that when it works in high-viscosity fluid media It is prone to sticking and makes the overpressure relief action insensitive. For example, due to the viscosity of the medium, the valve core opens slowly when the overpressure is over, which further aggravates the disadvantage of poor pressure stabilization ability, and the high-viscosity fluid between the valve core and the valve seat It is easy to cause the safety valve to not close tightly when returning to its position after pressure relief, resulting in leakage

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