Control valve trim for high-pressure fluid flow
DCFirst Claim
1. A fluid flow control device that comprises:
- (1) a valve body with a fluid inlet and outlet, and a flow path between the inlet and the outlet;
(2) a plug movable in the flow path;
(3) a flow resister within the flow path cooperating with the plug for reducing the pressure and noise of the fluid passing through the valve body, wherein the flow resister is defined by a plurality of labyrinthine passages comprising rectangular sectional elbows formed by protrusions in alternating wall members in the flow resister wherein the openings for fluid inlet and outlet are opposed to the protrusions to produce tortuous flow paths for the fluid passing through the resister; and
(4) a seat for closing the fluid outlet when the plug is brought into contact with the seat.
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Abstract
Disclosed is a fluid flowing control device of a valve having fluid flowing paths which are made in more sophisticated configuration and by controlling the velocity of the fluid by the maximal use of available volume thereof, to thereby prevent to a maximal extent the generation of cavitation, flashing, blocking by foreign materials, and the damage of internal parts. The device includes a cage having an inside cylinder which is closely contacted with a plug, an outside cylinder which forms a plurality of holes in axial and radius directions, respectively, a first internal cylinder which forms a plurality of concave/convex grooves having rectangular sectional elbows with recess in an axial direction, a second internal cylinder which forms a plurality of holes in axial and radial directions, and upper and lower supporting plates for closely coupling the inside and outside cylinders with the first and second internal cylinders on the top and bottom ends thereof; the plug forming a sealing portion and an opening/closing portion which are in contact with a seat, on the leading end of the lower portion thereof, to thereby open/close the seat and control the fluid flow, while being moved in the inside of the cage; and the seat being in internal-contact with the plug.
59 Citations
12 Claims
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1. A fluid flow control device that comprises:
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(1) a valve body with a fluid inlet and outlet, and a flow path between the inlet and the outlet;
(2) a plug movable in the flow path;
(3) a flow resister within the flow path cooperating with the plug for reducing the pressure and noise of the fluid passing through the valve body, wherein the flow resister is defined by a plurality of labyrinthine passages comprising rectangular sectional elbows formed by protrusions in alternating wall members in the flow resister wherein the openings for fluid inlet and outlet are opposed to the protrusions to produce tortuous flow paths for the fluid passing through the resister; and
(4) a seat for closing the fluid outlet when the plug is brought into contact with the seat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
(1) a flow resister cage having an inside cylinder, which is closely contacted with said plug and defines a plurality of holes and protrusions in radial directions, respectively, an outside cylinder which defines a plurality of holes in radial directions, a first internal cylinder which defines a plurality of grooves along an axial direction and a plurality of holes on said first internal cylinder, a second internal cylinder which defines a plurality of holes in radial directions, said first and second internal cylinders being thereby overlapped and inserted between said inside and outside cylinders in an alternating combination of said first and second internal cylinders, and forming a plurality of protrusions and grooves forming rectangular elbows, and upper and lower supporting plates for closely coupling said inside and outside cylinders with said first and second internal cylinders on the top and bottom ends of said cylinders;
(2) the plug forming a sealing portion and an opening/closing portion when the plug is moved in contact with a seat, on the leading end of the lower portion of said plug and a plurality of holes bypassing said opening/closing portion through a groove on the top portion of said opening/closing portion, to thereby open/close said seat and control the fluid flow while being moved in the inside of said cage; and
(3) the seat being in internal-contact with said plug.
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3. The device of claim 2, wherein the cage having (i) a first internal cylinder which defines a plurality of grooves in the wall members of the cylinder, having concave and convex regions along an axial direction in the wall members defines a plurality of holes into concave regions, (ii) a second internal cylinder which defines wall members with an identical shape with said first internal cylinder but defines holes into convex regions, thereby being overlapped and inserted between said inside and outside cylinders in alternating combination of first and second cylinders.
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4. The device of claim 2, wherein said cage comprises a first internal cylinder which defines a plurality of holes into the lower part of concave regions, a second internal cylinder which defines a plurality of holes into the upper part of said concave regions, adapted to be thereby overlapped and inserted between said inside and outside cylinders in alternating combination of said first and second cylinders.
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5. The device of claim 2, wherein said cage comprises a first internal cylinder which forms concave and convex ridges on one side of a wall member along an axial direction and defines holes into the lower part of concave regions in the wall member, a second internal cylinder which defines an identical shape with said first internal cylinder in the wall member but defines holes into the upper part of the concave regions in the wall member, being thereby overlapped and inserted between said inside and outside cylinders in a linear combination of said first and second cylinder.
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6. The device of claim 5, wherein said cage is devoid of a convex ridge against fluid flow.
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7. The device of claim 2 wherein a first hole in the outside and inside cylinders into which the fluid flows is smaller than or equal to (i) a second hole of other cylinders and (ii) the side distance between the hole as a fluid flowing path of said other inside, outside and second internal cylinders and the groove of said first internal cylinder, and (iii) the size of the side distance of the rectangular section elbow path.
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8. The device of claim 2, wherein said cage comprises said inside cylinder which is formed as an integrated body with said lower supporting plate and said outside cylinder as an integrated body with said upper supporting plate, being thereby coupled up and down with each other.
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9. The device of claim 1, wherein said seat which defines a circumferential protrusion on the sealing portion of said seat, said plug having a circumferential groove on the upper portion of the protrusion of said sealing portion of said plug, thereby defines a stepped plug having a circumferential groove and protrusion between said seat and said plug.
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10. A fluid flowing control device according to claim 9 comprising:
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a seat which has an integrated body with a fluid flowing cylindrical resistor, and a plurality of holes as a fluid flowing path and said seat defines a first protruded groove and a first protrusion in a multi-step manner; and
said plug having a second protruded groove and a second protrusion which is inserted into said first protruded groove and said first protrusion of the seat, with clearance in a circumferential direction.
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11. A fluid flowing control device according to claim 1, wherein
said flow resister comprises a plurality of upper and lower discs being stacked up and down containing a plurality of first and second holes formed in a constant distance and aligned angularly with the center of said upper and lower discs, first and second protrusions in opposition to said first and second holes and each formed on the inside and outside of said lower discs, and a plurality of rectangular section elbows continuously formed by the arrangement of said first and second holes, each rectangular section elbow being defined by third and fourth protrusions on the inside rectangular portion thereof and opposing the holes in the discs, and fifth and sixth protrusions on the opposite of said third and fourth protrusions. -
12. The device of claim 11, wherein said flow resister comprises a plurality of discs which are stacked, each having a groove where each of said rectangular section elbows has an orifice and recess in a constant distance and aligned angularly with the center of a disc and are repeated and first and second protrusions each are opposed to a hole formed on the inside and outside of a disc.
Specification