Pneumatic hydraulic corrugated pipe annular combination type wear-resisting ball valve

Abstract

The invention discloses a pneumatic hydraulic corrugated pipe annular combination type wear-resisting ball valve, and belongs to inventions and creations in the aspect of special ball valves. The novel valve is developed to solve the prominent problems that a lock hopper valve and a lock slag valve used in an existing coal chemical industry device and a silicon powder valve of a polycrystalline silicon device are unstable in operation, short in service life and the like. According to the pneumatic hydraulic corrugated pipe annular combination type wear-resisting ball valve, each of an inner cavity of a left valve body and an inner cavity of a right valve body is provided with an annular multi-corrugated-pipe combined hydraulic pusher and a hydraulic sealing valve seat, each valve seat is designed to be a movable contact spherical surface and controls sealing through hydraulic pressure, in the rotation process of a ball body, friction is not generated between valve seat sealing rings and the spherical surfaces, only when the valve is closed, the sealing rings and the spherical surfaces are closed to form reliable sealing, and therefore, the service life of the valve is reliably guaranteed, and the valve opening and closing torque is small, so that operation is time-saving and labor-saving.

Description

technical field [0001] The "pneumatic hydraulic bellows ring group wear-resistant ball valve" of the present invention belongs to the invention and creation of special ball valves. The invention relates to special valves for process pipelines in petrochemical, power plant, metallurgy, coal chemical and other industries. Background technique [0002] The main task of the present invention is aimed at the existing coal chemical plant and polysilicon chemical plant, as well as the steel plant slurry working condition device, etc., the imported special valves and the special valves that are being localized can no longer meet the above working conditions in use. Requirements, the process conditions of the device are complicated, the working conditions are very harsh, and the technical requirements for the equipment are strict, so the key equipment in the device are all imported products. In the past 10 years of use, the life of imported valves has not reached the actual life of ...

AI Technical Summary

Problems solved by technology

In the past 10 years of use, the life of imported valves has not reached the actual life of 20,000 online operations, especially the lock bucket valve, slag lock valve, and silicon powder valve, which have frequent operational failures and seriously affect the entire device. normal production

When these valves are used for one year, some even a few months, there will be problems: First, the opening and closing torque of the valve is too large, the ball switch is not in place, the valve seat bites the spherical surface, and the ball is severely chipped, which is easy to cause the ball Stuck

Second, even if it is not stuck, the valve seat and the spherical surface are severely worn and strained, which makes the sealing surface invalid and the leakage seriously exceeds the standard.

Of course, it is known that this kind of parking will cause great economic losses to the company. In order to avoid accidental parking, several domestic valve factories have carried out localization innovation on imported valves. They use spraying technology to spray the spherical surface and valve seat with hard alloy , to strengthen the life of wear parts, has received certain results, but it is still not ideal, and the hidden danger of valve life has not been eradicated. Therefore, if we want to completely solve the existing problems, we must have new innovations and breakthroughs in the valve design structure. The key technical problems of hard-sealed ball valves have been completely solved

[0003] To sum up, through on-the-spot research on special valve process devices, the valve is analyzed to find out the existing problems. The medium contains large and small hard particles mixed with high-speed fluid flow, which impacts and washes the valve internals. , so that the contact surface of the valve seat sealing ring and the ball is severely worn. In addition, the valve seat sealing ring bites the spherical surface, and the ball is severely chipped, which is also the main reason for the damage to the service life of the valve.

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