An automatic liquid flow stabilization device based on jet cavitation

Abstract

The invention discloses an automatic liquid flow rate stabilizer based on jet cavitation. The device comprises a feed pipe, a suction chamber, a stop collar, decompression rings, a nozzle and a cavitation cavity. The device firstly divides a flow from upstream into two parts, wherein one part is sprayed into the cavitation cavity after being accelerated and decompressed via the nozzle, while the other part also flows into the cavitation cavity after being decompressed by the decompression rings connected in series. The two flows are converged again in a shrinkable pipe in the cavitation cavity, the two flows generate a vortex and then generates a relatively large cavitation to cause cavitation inception, then violent cavitation clouds are rapidly formed in a choke to congest the whole choke, and gradually collapsed after being continuously developed to a diffusion pipe; the choke is full of the cavitation clouds, so that fluctuation of outlet pressure cannot be transmitted to the upstream of the choke, and thus a pressure difference between the feed pipe and the shrinkable pipe is always constant, and flow rate stability is achieved. The device provided by the invention is extremely rapid in response speed, invention high in flow rate stability, simple in structure, high in maintainability, strong in adaptation capacity to medium, and capable of being used in large scale.

Description

technical field [0001] The invention belongs to the technical field of liquid flow control, and in particular relates to a brand-new liquid automatic flow stabilization device based on jet cavitation. Background technique [0002] Existing liquid flow stabilizing devices can be roughly divided into two types: electric control and automatic control. Electric control requires the use of electric signals to drive the feedback unit for control. Most of them use the form of cooperation between the electric control valve and the flow sensor. When the flow sensor senses the flow change, it transmits the signal to the control center, and the control center then sends an action to the electric control valve. instruction, and then the flow control is realized by the action of the electronically controlled valve until the flow returns to the set value. The electronically controlled constant flow water valve disclosed by the publication number CN1865747A is exactly this type. Self-cont...

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Problems solved by technology

[0003] Whether it is electronic control or automatic control, the existing liquid flow stabilization device is a gradual flow stabilization device, and there is a problem that the adjustment time is too long to cause the flow to fluctuate between the set value for too long, the fluctuation range is large, and the device structure is complicated , poor maintainability

The automatic control device similar to the pilot-operated flow control valve also has the problem of low flow stability and accuracy

These devices are not suitable for occasions that require very high flow stability and response speed

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