Valve for water flow control

Patent metadata

Field	Value
Publication number	US-11549590-B2
Application number	US-202017131640-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Dec 31, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A valve includes an actuation assembly including a drive device that generates a driving force, a needle shaft connected, at one end thereof, to the drive device to receive the driving force from the drive device and perform linear motion, a needle nut that is coupled to the drive device and that has an empty space through which the needle shaft passes, so as to guide the linear motion of the needle shaft, and a valve disc coupled to an opposite end of the needle shaft, a body is coupled with the actuation assembly and that has a valve opening inside, the valve opening being selectively opened or closed as the valve disc, which is inserted into the body in which water flows, performs linear motion, and a clip that fixes the body and the actuation assembly such that the body and the actuation assembly are not separated from each other.

First claim

What is claimed is:

1. A valve comprising:
an actuation assembly including a drive device configured to generate a driving force, a needle shaft connected, at one end thereof, to the drive device to receive the driving force from the drive device and perform linear motion, a needle nut coupled to the drive device and having an empty space through which the needle shaft passes, so as to guide the linear motion of the needle shaft, and a valve disc coupled to an opposite end of the needle shaft;
a body coupled with the actuation assembly and having a valve opening inside, the valve opening being selectively opened or closed as the valve disc, which is inserted into the body in which water flows, performs linear motion;
a clip configured to fix the body and the actuation assembly such that the body and the actuation assembly are not separated from each other,
wherein the body includes a clip insertion opening formed through a portion of the body configured to surround the needle nut,
wherein the needle nut includes a clip insertion groove concavely formed on a portion of an outer surface of the needle nut that is inserted into the body, and
wherein the clip fixes the body and the actuation assembly by being inserted into the clip insertion groove while passing through the clip insertion opening,
wherein the clip includes an insert having two parallel legs inserted into the clip insertion groove and the clip insertion opening,
wherein the needle shaft includes a small-diameter part and a large-diameter part which has a larger diameter than that of the small-diameter part, wherein the small-diameter part extends from the large-diameter part, and
wherein the actuation device further includes a buffer ring coupled to the small-diameter part and disposed between the valve disc and the large-diameter part.

2. The valve of claim 1 , wherein the clip further includes
a handle having a shape bent and extending from the insert so as to be disposed outside the body when the insert fixes the body and the needle nut.

3. The valve of claim 1 , wherein the valve disc is coupled to a distal end of the needle shaft configured to face a reference direction and to further protrude beyond the needle nut along the reference direction and has a convex shape along the reference direction.

4. The valve of claim 3 , wherein a flat surface formed at a distal end of the valve disc configured to face the reference direction is perpendicular to the reference direction.

5. The valve of claim 1 , wherein the valve disc is formed such that an effective region of a flow passage formed between a periphery of the valve opening and an outer surface of the valve disc that is most adjacent to the periphery of the valve opening is formed like a side surface of a truncated cone when the valve disc performs linear motion along a reference direction.

6. The valve of claim 1 , further comprising:
an annular disc ring inserted into a disc groove concavely formed on an outer surface of the valve disc,
wherein an outer surface of the disc ring makes contact with an inner surface of the body to close the valve opening when the valve disc moves along a reference direction and is inserted into the valve opening, wherein the inner surface of the body defines the valve opening.

7. The valve of claim 6 , wherein the valve disc includes:
a pillar portion formed in a cylindrical shape having a diameter smaller than or equal to a diameter of the valve opening; and
a protruding portion formed in a convex shape along the reference direction from a side of the pillar portion configured to face the reference direction, and
wherein the disc groove is concavely formed on an outer surface of a portion where the pillar portion and the protruding portion meet.

8. The valve of claim 6 , wherein the disc ring is a Quad-ring having a cross-sectional shape with four protruding portions.

9. The valve of claim 1 , wherein the valve disc includes:
a pillar portion formed in a cylindrical shape having a base with a larger diameter than the valve opening; and
a protruding portion inserted into the valve opening, wherein the protruding portion convexly protrudes along a reference direction from a side of the pillar portion configured to face the reference direction, and
wherein a step is formed on a portion where the pillar portion and the protruding portion meet, such that a lower surface of the pillar portion makes contact with a valve seat formed around the valve opening when the valve opening is closed.

10. The valve of claim 9 , wherein the protruding portion includes:
a protruding base portion protruding in a cylindrical shape along the reference direction from the pillar portion so as to be inserted into the valve opening when the valve opening is closed, the protruding base portion having a base with a diameter smaller than or equal to a diameter of the valve opening; and
a protruding insert protruding along the reference direction from a side of the protruding base portion configured to face the reference direction, the protruding insert having a shape in which an area of a cross-section perpendicular to the reference direction gradually decreases along the reference direction.

11. The valve of claim 1 , wherein the valve disc is formed of a material containing PTFE(Polytetrafluoroethylene).

12. The valve of claim 1 , wherein an external male thread is formed on a portion of an outer surface of the needle shaft,
wherein an internal female thread engaged with the external male thread of the needle shaft is formed on a portion of an inner surface of the needle nut configured to define the empty space, and
wherein the needle shaft performs linear motion along the inner surface of the needle nut while being rotating by the driving force transmitted from the drive device.

13. The valve of claim 1 , wherein the actuation assembly further includes an annular shaft ring coupled to an outer surface of the needle shaft and configured to make contact with an inner surface of the needle nut to maintain water tightness, wherein the inner surface of the needle nut defines the empty space, and
wherein the shaft ring is a Quad-ring having a cross-sectional shape with four protruding portions.

14. A valve comprising:
an actuation assembly including a drive device configured to generate a driving force, a needle shaft connected, at one end thereof, to the drive device to receive the driving force from the drive device and perform linear motion, a needle nut coupled to the drive device and having an empty space through which the needle shaft passes, so as to guide the linear motion of the needle shaft, and a valve disc coupled to an opposite end of the needle shaft;
a body coupled with the actuation assembly and having a valve opening inside, the valve opening being selectively opened or closed as the valve disc, which is inserted into the body in which water flows, performs linear motion,
wherein the needle shaft includes a small-diameter part of which distal end is inserted into a center hole formed inside the body so that the motion of the needle shaft along a reference direction is guided by the center hole and a large-diameter part which has a larger diameter than that of the small-diameter part, wherein the small-diameter part extends along the reference direction from the large-diameter part,
wherein the valve disc is coupled to the small-diameter part, configured to face the reference direction, further protrude beyond the needle nut along the reference direction, and have a convex shape along the reference direction, and the valve disc is formed such that an effective region of a flow

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Joo Jae Myung
• Jeong Doo Hyung

Classifications

• F16K1/482

  with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member · CPC title

• F16K1/02 Primary

  with screw-spindle (F16K1/12 - F16K1/28 take precedence; actuating mechanisms with screw-spindles F16K31/50) · CPC title

• F16K31/04 Primary

  using a motor · CPC title

• F16K31/50

  with screw-spindle {or internally threaded actuating means} · CPC title

• F16K41/02

  with stuffing-box {; Sealing rings} · CPC title