Adjusting valve with opening and closing function

Abstract

The invention discloses an adjusting valve with an opening and closing function. The adjusting valve comprises a valve body and an executing mechanism. A medium inlet is formed in one end of the valvebody, and a medium outlet is formed in the other end, opposite to the medium inlet, of the valve body; the shortest runner communicating to the medium inlet and the medium outlet is arranged in the valve body; a groove, penetrating the runner, is formed in the vertical direction of the runner, a plunger matched with the runner is arranged in the groove, and a through hole is formed in the plunger; the executing mechanism comprises a connecting rod driving the plunger to move, and the connecting rod drives the plunger to move in a reciprocating manner up and down in the groove, so that the plunger is matched with the runner to open or close the runner quickly. The connecting rod drives the plunger to rotate in the runner, so that the runner and the through hole are overlaid to different extents to adjust the flow of the runner continuously. The valve not only has the opening and closing and continuous adjusting compound functions, but also prevents inconvenience as the quantity of interfaces, power supplies and control cables on a pipeline is increased because the two types of valves are connected in series or in parallel.

Description

technical field [0001] The invention belongs to a control system, in particular to a regulating valve with switch function. Background technique [0002] As a common executive and regulating mechanism in automatic control systems, valves can be divided into two categories: regulating valves and on-off valves according to their basic functional classification. For example: electromagnetic gate valve belongs to on-off valve, and pneumatic V-type ball valve belongs to regulating valve. The actuator of the control valve can drive the valve body for continuous adjustment of 0-100% opening, and a complete stroke time (100% opening adjustment) is generally 10-30 seconds; the switch valve only has two states: fully open and fully closed , the state switching time is generally less than 1 second. [0003] In practical applications, such as pipeline transportation of gas, liquid and other media, under normal conditions, it is necessary to continuously adjust the flow or pressure, an...

AI Technical Summary

Problems solved by technology

[0003] In practical applications, such as pipeline transportation of gas, liquid and other media, under normal conditions, it is necessary to continuously adjust the flow or pressure, and in some special cases, emergency shutdown or emergency opening (second-level response) is required. The single-function valves described above are no longer applicable

The general solution is to connect two types of valves in series or in parallel, but this solution increases the (flange, thread, etc.) interface on the pipeline, increases the number of power supply and control cables and the complexity of the equipment

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