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Cage type single seat regulating valve

A control valve and cage technology, which is applied in the field of cage control valves with single-seat structure, can solve the problems of valve core and seat damage, control valve noise, etc.

Inactive Publication Date: 2008-06-25
JIANGNAN VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current cage-type single-seat control valve still cannot achieve the ideal effect on cavitation and erosion, the valve core and valve seat will still be damaged by fluid flashing and cavitation, and the noise of the control valve is still relatively large during operation

Method used

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  • Cage type single seat regulating valve

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Embodiment Construction

[0014] Fig. 1 is a cross-sectional view of a cage-type single-seat regulating valve of the present invention, including a valve body 1, which has a fluid medium inlet side A and an outlet side B, and the regulating valve is installed on a fluid pipeline through the inlet side and the outlet side to regulate The pressure of the fluid in the pipe.

[0015] A valve cover 2 is fixed on the upper part of the valve body 1 , and a flow regulating mechanism is arranged in the space formed by the valve body 1 and the valve cover 2 . This flow regulating mechanism includes a valve seat 3 fixed on the valve body 1, a valve core 4 is manufactured to be configured with the valve seat 3, the valve core 4 is connected to one end of a valve stem 5, and the other end of the valve stem 5 protrudes The valve cover 2 moves up and down due to the driving device (not shown in the figure), thereby driving the valve core 4 to move up and down to change the size of the throttle between the valve seat ...

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Abstract

A cage type single-seat control valve comprises a valve body having an inlet and an outlet, and a valve cap arranged on the upper part of the valve body, wherein a flow control mechanism is arranged in the space formed by the valve body and the valve cap. The flow control mechanism comprises a valve seat on the valve body, wherein a valve core matches the valve seat, one end of a valve stem is fixedly connected with the valve core, the other end of the valve stem extends out of the valve cap, the valve stem can move up and down relative to the valve cap, a cage where the valve core moves up and down is arranged between the valve cap and the valve seat, and a plurality of orifices are arranged on the cage. The invention is characterized in that: the valve seat extends towards the entrance side of the valve body to form a side wall and is also provided with an end plate at the end opposite to the valve core, and the end plate is provided with a plurality of orifices. The control valve which has a three-level throttling structure can gradually consume the energy of high-pressure fluid medium and reduce the erosive action of the medium on the valve body to the lowest level, thereby prolonging the service life of the control valve and reducing operating noise.

Description

technical field [0001] The invention relates to a cage-type regulating valve, in particular to a cage-type regulating valve with a single-seat structure. Background technique [0002] In a control system with a high degree of automation, the regulating valve is usually used as the terminal actuator of the automatic regulating system. The purpose of the flow rate, the action sensitivity of the regulating valve is directly related to the quality of the regulating system. According to the actual statistics on site, about 70% of the failures are white control valves. In daily maintenance, the factors affecting the safe operation of control valves are summarized and analyzed. Among them, the deformation and leakage of valve core and valve seat are one of the main factors affecting the safe operation of control valves. [0003] Regulating valves are often used in high-pressure environments, and their working method is to reduce the fluid pressure by using the throttling effect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/36F16K1/42F16K47/08
Inventor 黄作兴
Owner JIANGNAN VALVE