Multi-stage poppet valve

Patent metadata

Field	Value
Publication number	US-10167973-B2
Application number	US-201615354437-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Dec 2, 2015
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

Provided is a multi-stage poppet valve including: a flow pipe in which a channel through which a fluid flows is formed; a fixing part extended inwardly from an inner peripheral surface of the channel of the flow pipe, and having a first channel formed therein, the first channel being hollowed in a vertical direction and having the fluid flowing therethrough; a main valve part disposed on the fixing part, having a second channel formed at the center of an inner portion thereof, and vertically moved by force acting in the vertical direction to open and close the first channel, the second channel having the fluid flowing therethrough; and an auxiliary valve part vertically moved in the second channel by force acting in the vertical direction to open and close the second channel, thereby controlling a flow rate of the fluid passing through the second channel.

First claim

What is claimed is:

1. A multi-stage poppet valve comprising:
a flow pipe in which a channel through which a fluid flows is formed;
a fixing part extended inwardly from an inner peripheral surface of the channel of the flow pipe, and having a first channel formed therein, the first channel being hollowed in a vertical direction and having the fluid flowing therethrough;
a main valve part disposed on the fixing part, having a second channel formed at a center of an inner portion thereof, and vertically moved by force acting in the vertical direction to open and close the first channel, the second channel having the fluid flowing therethrough; and
an auxiliary valve part vertically moved in the second channel by force acting in the vertical direction to open and close the second channel, thereby controlling a flow rate of the fluid passing through the second channel,
wherein the first channel and the second channel are selectively opened and closed depending on magnitudes of force acting on the main valve part and the auxiliary valve part,
wherein the main valve part includes a first protrusion protruding from an upper inner surface of the second channel toward a center of the flow pipe, a second protrusion protruding from a lower inner surface of the second channel toward the center of the flow pipe and formed below the first protrusion, and a flow space formed between the first protrusion and the second protrusion, and
the auxiliary valve part is vertically moved in the flow space and a vertical movement distance of the auxiliary valve part is limited by the first protrusion and the second protrusion.

2. The multi-stage poppet valve of claim 1 , wherein the auxiliary valve part includes:
a valve stem having a bar shape; and
a valve head integrated with the valve stem at a lower end of the valve stem and having a conical shape in which a lower end portion thereof becomes narrow toward the center toward a downward direction, and
the valve head is inserted into the flow space and is vertically movable in the flow space.

3. The multi-stage poppet valve of claim 2 , wherein the valve head includes flow grooves formed in an upper surface thereof,
when the upper surface of the valve head contacts a lower surface of the first protrusion, the fluid flows through the flow grooves, and
when a lower surface of the valve head contacts an upper surface of the second protrusion, the second channel is closed.

4. The multi-stage poppet valve of claim 1 , further comprising an additional main valve part having a third channel formed at the center of an inner portion thereof, and having third and fourth protrusions protruding from upper and lower inner surfaces of the third channel toward the center of the flow pipe, respectively, the third channel having the fluid flowable therethrough,
wherein the main valve part is vertically movable in a flow space formed between the third and fourth protrusions of the additional main valve part.

5. The multi-stage poppet valve of claim 4 , wherein the number of additional main valve parts included in a multi-stage poppet valve is one or more.

Assignees

• Korea Aerospace Res Inst

Inventors

• Yoo Jaehan

Classifications

• F16K27/0209 Primary

  Check valves or pivoted valves · CPC title

• F16K15/021

  the valve member being a movable body around which the medium flows when the valve is open (F16K15/025 - F16K15/12 take precedence) · CPC title

• F16K31/12

  actuated by fluid ({fluid-actuated lift valves F16K1/126} ; fluid-actuated check valves F16K15/00; fluid-actuated safety valves F16K17/00) · CPC title

• F16K39/024 Primary

  using an auxiliary valve on the main valve · CPC title