Anti-blocking and scouring-resistant bidirectional seal adjusting valve

Abstract

The invention relates to an anti-blocking and scouring-resistant bidirectional seal adjusting valve which comprises a valve and a bonnet. A valve seat assembly is arranged on the valve and is provided with a valve ball, a valve stem and a lower shaft are respectively arranged on the upper side and the lower side of the valve ball, the valve ball is coaxially and centrally constrained by the lower shaft and the valve stem, can carry out rotation action along the coaxial central lines of the lower shaft and the valve stem and is provided with a non-circular flow channel, an inlet end of the flow channel is of an approximately triangular structure, two semicircles with different sizes are combined with each other to form an outlet end of the flow channel, the semicircles are larger than standard circular flow channels, and an elliptical or '8'-shaped or 'O'-shaped combination is formed by the two semicircles; the valve and the bonnet are provided with coaxial straight circular flow channels, the bonnet is provided with a medium inlet end, and the valve is provided with a flow channel outlet end. The anti-blocking and scouring-resistant bidirectional seal adjusting valve has the advantages that flow can be precisely adjusted by the anti-blocking and scouring-resistant bidirectional seal adjusting valve in solid particles, high-pressure fluid and complex fluid with solid media, band fiber media, paper pulp and the like, and the anti-blocking and scouring-resistant bidirectional seal adjusting valve can be bidirectionally sealed under emergency conditions.

Description

Technical field [0001] The invention relates to the technical field of valves, in particular to an anti-blocking and erosion-resistant bidirectional sealing regulating valve. Background technique [0002] In industrial process control, the adjustment of complex fluids containing solid particles, ribbon-like fiber media, pulp, etc. often uses V-shaped ball valves for adjustment and control. The V-shaped ball valve is a hemisphere, and one end of the sphere is set in a "V"-shaped gap shape. To seal the valve seat. With the continuous improvement of industrial process control requirements and the continuous increase of process application parameters, not only high valve adjustment accuracy is required, but also the regulating valve is required to have extremely high sealing performance and use function in more complex working conditions. However, the current V-shaped ball valve sphere is a hemisphere, and the adjustment depends on the cross space area of ​​the sphere's V-shaped por...

AI Technical Summary

Problems solved by technology

However, the current V-type ball valve is a hemisphere, and the adjustment depends on the cross space area between the "V" shape of the ball and the valve seat flow channel. The shape and size of the flow channel cannot be accurately set according to actual requirements, and the adjustment accuracy is low. At the same time, the hemisphere The shape cannot meet the high-strength requirements under high-pressure conditions, and the pressure-bearing capacity of the V-type ball valve is extremely limited. When the reverse medium pressure is higher than the pressure at the inlet end, the valve cannot achieve sealing

Therefore, the current V-type ball valve can no longer adapt to the high-speed development of industrial process control requirements, and urgently needs to be solved.

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