Flow stabilizer for pilot-operated modulating valve system专利检索-需求侧响应分销网络和设备专利检索查询-专利查询网

Flow stabilizer for pilot-operated modulating valve system

阅读：154发布：2021-10-17

专利汇可以提供Flow stabilizer for pilot-operated modulating valve system专利检索，专利查询，专利分析的服务。并且The valve system comprises a main valve including a diaphragmoperated poppet separating an inlet side from an outlet side, a pilot valve for opening and closing the main valve in response to a predetermined pressure or flow condition, and a restrictor (for example, the inlet nozzle of an ejector) coupled to pass fluid from the inlet side to a flow stabilizer and to the pilot valve. The flow stabilizer is connected between the ejector and a diaphragm chamber in the main valve. The stabilizer passes fluid from the ejector to the diaphragm chamber, and at other times from the diaphragm chamber to the ejector, at a restricted rate for slowly opening and closing the main valve in response to slow or small changes in the demand, and at much faster rates for rapidly opening and closing the main valve in response to sudden and substantial changes in the demand.，下面是Flow stabilizer for pilot-operated modulating valve system专利的具体信息内容。

权利要求

1. A fluid-flow stabilizing and regulating device for use in a modulating valve system, comprising: first valve means responsive to a predetermined pressure differential across said device for increasing the fluid flow in a first direction therethrough, second valve means arranged in parallel with said first valve means and responsive to a predetermined pressure differential across said device for increasing the fluid flow in a second direction therethrough, said second direction being opposite to said first direction, and means to form a continuously-open restricted passage in parallel with both of said valve means for continuously transmitting fluid in either said first direction or said said second direction through said device.

2. The invention as claimed in claim 1, in which each of said first and second valve means is a normally-closed spring-pressed regulating and check valve, and in which the spring settings of said regulating and check valves are such that fluid flow through said device frequently occurs only through said continuously-open restricted passage.

3. The invention as claimed in claim 1, in which said restricted passage has a cross-sectional area substantially smaller than the flow area of either said first valve means or said second valve means when said valve means are in open condition.

4. The invention as claimed in claim 1, in which said device includes a housing having a large fluid-flow passage therethrough, and means to form a check plate across said passage, said check plate having a first valve port therein and also having second valve port means therein, in which said first valve means includes a poppet member mounted on one side of said check plate and associated with said first valve port to open and close the same, said poppet member being spring pressed toward closed position, and in which said second valve means includes a member mounted on the other side of said check plate and spring biased toward closed position over said second valve port means.

5. The invention as claimed in claim 4, in which said poppet member is said means to form a continuously-open restricted passage.

6. The invention aS claimed in claim 5, in which a wire is movably mounted longitudinally of said flow passage to maintain the same clear of obstructions.

7. The invention as claimed in claim 4, in which said poppet member has a tapered face whereby to provide a throttling action upon opening and closing of said poppet member against the bias of the spring therefor.

8. The invention as claimed in claim 1, in which said device includes a housing having a large fluid-flow passage therethrough, in which a check plate is provided across said passage, said check plate having a central relatively large port therethrough, said check plate also having a plurality of spaced ports formed therethrough radially-outwardly of said central port, in which said first valve means includes a poppet mounted on one side of said check plate to open and close said central port, in which a spring is provided to bias said poppet toward closed position blocking flow through said port, in which said second valve means includes a ring mounted on the other side of said check plate to close said spaced ports therein, in which a spring is provided to bias said ring toward closed position blocking flow of fluid through said ports, and in which said means to form a continuously-open restricted passage includes a small-diameter bore through said poppet.

9. The invention as claimed in claim 8, in which a tubular element extends axially from said check plate in registry with said central port therethrough, in which said poppet has a tapered portion extending into said central port and into said tubular element, and in which said ring is mounted around said tubular element.

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Flow stabilizer for pilot-operated modulating valve system

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