Adduction disc type pipeline angle valve capable of being adjusted to be opened and closed

Abstract

The invention relates to an adduction disc type pipeline angle valve capable of being adjusted to be opened and closed, which is mainly connected with an angle valve body through a positioning step at the upper end of a valve seat, the angle valve body, the valve seat, a sealing gasket and a T-pipe are fixed by valve body studs and valve body nuts, the top end of the valve rod penetrates through an upper cover and protrudes from the angle valve body, the upper cover is mounted on the angle valve body, a guide sleeve is fixed on the upper cover, a packing gasket, a first packing component, a packing spacer sleeve, a second packing component, a packing gland, a scraper seal and a packing press plate are arranged on the valve rod in sequence, and the upper cover, a sealing ring and the angle valve body are fixed by upper cover studs and upper cover nuts. With the adoption of the angle valve, the functions of small opening adjustment and opening and closing in the whole stroke can be achieved, the requirement of field process control can be completely met, the valve is good in dynamic stability and is convenient to maintain on line, the maintenance cost of a product is reduced, the possibility of medium leakage at the sealing position between the valve rod and packing is reduced, the valve is good in tightness, medium dead zones can be decreased, and material accumulation can be avoided.

Description

technical field [0001] The invention relates to an inner-disc type adjustable switch pipeline angle valve, specifically an inner-expanded disc-type adjustable switch pipeline angle valve developed for PTA working conditions with small opening adjustment and full stroke realization switch function, belonging to Fluid control valve field. Background technique [0002] The pipeline angle valve is responsible for the control and cut-off of CTA and PTA slurry pipelines, as well as part of the reactor and crystallizer flushing pipelines in the PTA plant. The working medium generally has the characteristics of high temperature, high pressure and strong corrosion Suspended solids, gas phase, and liquid phase coexist, so valves often face harsh working conditions that are easy to block, easy to cavitate, strong corrosion, and strong erosion. Therefore, its material, connection method, connection size, flow capacity, and anti-cavitation ability , self-cleaning ability, sealing perfor...

AI Technical Summary

Problems solved by technology

The traditional plunger-type pipeline angle valve can only satisfy a single switch function, but in actual use, especially in the trial production stage of chemical equipment; because the simulated process conditions cannot quickly reach the normal state, the valve must be in a long period of time. It is used in a small opening state and needs to provide adjustment functions, but when the process conditions are normal, the valve is required to be in a full-stroke working state to meet the flow requirements; at this time, the traditional plunger-type pipeline angle valve is powerless, and the plunger valve Because the plunger diameter is close to the nominal diameter of the valve, the sealing of large-diameter plunger angle valves has always been a technical problem

Therefore, choosing which structure of valve to meet the above working conditions has always been a major problem for design institutes and end customers.

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