High-pressure-difference and low-noise V-shaped ball flow automatic adjusting valve

Abstract

The invention discloses a high-pressure-difference and low-noise V-shaped ball flow automatic adjusting valve. The high-pressure-difference and low-noise V-shaped ball flow automatic adjusting valve comprises a valve body, a V-shaped ball valve element arranged in the valve body and a valve rod used for driving the V-shaped ball valve element to rotate, and further comprises an outlet pressure sensor used for detecting the pressure of the outlet position of the V-shaped ball valve element, an inlet pressure sensor used for detecting the pressure of the inlet position of the V-shaped ball valve element, and a controller used for receiving remote flow control signals and adjusting the opening or closing angle of the V-shaped ball valve element according to the pressure signal variable quantity fed back by the outlet pressure sensor and the inlet pressure sensor when the remote flow control signals are not changed. According to the V-shaped adjusting valve, the pressure information of the inlet position and the outlet position of the V-shaped ball valve element is detected in real time, the remote flow control signals are adopted in combination, the opening or closing angle of the V-shaped ball valve element is controlled in real time through the controller, and therefore the automatic flow adjusting function during load changing is achieved.

Description

technical field [0001] The invention relates to the field of flow regulating valve equipment, in particular to a V-shaped ball flow automatic regulating valve with high pressure difference and low noise. Background technique [0002] In petroleum, chemical, and deep-sea diving control systems, because the V-shaped regulating ball valve has a large adjustable ratio, generally between 300:1 and 200:1, the V-shaped ball valve core of the V-shaped regulating ball valve is in the process of action. The effective shearing action can be formed between the V-shaped notch on the spherical surface and the valve seat, and the straight-through flow channel structure is very suitable for the control of fiber media, slurry, powder and other fluids, gases and steam. Therefore, V-shaped regulating ball valves are increasingly widely used in petroleum, chemical, deep-sea diving and other devices. [0003] The currently used V-shaped regulating ball valve has a better effect when used in a l...

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Problems solved by technology

[0005] However, due to the change of the jet flow of the V-shaped regulating valve with the opening angle and the asymmetry of its own structure, the distribution of the jet flow and flow velocity at the valve port is not uniform. Therefore, in the prior art, uniformly distributed small holes are used for Buck and noise reduction, the effect is not obvious

[0006] In addition, for the V-shaped regulating valve, under the action of high pressure difference, since the thrust of the working medium received by the V-shaped ball valve core is directly transmitted to the valve stem, the valve stem bears a large lateral force, resulting in the V-shaped ball valve The V-shaped ball valve core needs to apply a lot of torque when opening, which may cause the valve stem to stick

[0007] At the same time, the V-shaped control valves in the prior art all adopt the sealing type of packing. When the valve stem moves frequently, the packing wears and causes liquid leakage. During maintenance, the equipment must be disassembled and the packing gland should be tightened again, which is a waste of time. Increased labor costs

[0008] On the other hand, the V-shaped regulating valve in the prior art usually adopts pressure-mechanical feedback, which has low control precision, single regulation characteristics, and cannot be remotely controlled, and cannot automatically compensate for the nonlinear flow characteristics of the valve port.

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