Debris filtration apparatus

Patent metadata

Field	Value
Publication number	US-9958220-B2
Application number	US-201514971202-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Dec 17, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A debris filtration apparatus that includes a support unit including first to n-th unit supports arranged in a radial shape in a circumferential direction around a support housing disposed on an upper portion of a rotor unit configured to rotate at a predetermined speed in a chamber housing; a screen unit including first to n-th unit screens disposed between the first to n-th unit supports and configured to filter out debris from cooling water; and a bypass unit configured, when a load applied to the screen unit is increased to a predetermined level by debris deposited on the screen unit, to selectively rotate each of the first to n-th unit screens relative to the support unit and allow the cooling water to flow.

First claim

What is claimed is:

1. A debris filtration apparatus comprising:
a support unit including first to n-th unit supports arranged, to form a radial shape, in a circumferential direction around a support housing disposed on an upper portion of a rotor unit, the rotor unit being configured to rotate at a predetermined speed in a chamber housing;
a screen unit including first to n-th unit screens disposed between adjacent ones of the first to n-th unit supports and configured to filter out debris from cooling water; and
a bypass unit configured, when a load applied to the screen unit is increased to a predetermined level by debris deposited on the screen unit, to selectively rotate each of the first to n-th unit screens relative to the support unit and allow the cooling water to flow.

2. The debris filtration apparatus according to claim 1 , wherein the bypass unit includes:
a hinge that rotatably couples a first end of each of the first to n-th unit screens to the support housing; and
a connector that connects a second end of each of the first to n-th unit screens to the chamber housing,
wherein, the connector is configured to break when a load is increased to the predetermined level by debris deposited on the screen unit.

3. The debris filtration apparatus according to claim 2 , wherein the connector extends from an outside of the chamber housing toward the corresponding one of the first to n-th unit screens.

4. The debris filtration apparatus according to claim 2 , wherein the connector comprises:
a reduced-diameter part formed such that a diameter thereof is reduced from opposite ends thereof to a medial portion with respect to a longitudinal direction of the connector.

5. The debris filtration apparatus according to claim 2 , wherein the first to n-th unit screens are oriented in a horizontal direction between the adjacent ones of the first to n-th unit supports, and each of the first to n-th unit screens has an outer end that faces the chamber housing and is rotatable around the corresponding hinge toward the support housing.

6. The debris filtration apparatus according to claim 1 , wherein the bypass unit comprises:
first to n-th unit cylinders disposed outside the chamber housing toward the respective first to n-th unit screens; and
first to n-th unit pistons configured to move in a first direction from the respective first to n-th unit cylinders toward corresponding insert holes formed in the first to n-th unit screens or move in a second direction away from the insert holes.

7. The debris filtration apparatus according to claim 1 , wherein the bypass unit comprises:
a rotating shaft connected at one end thereof to a frame provided on the first to n-th unit screens; and
a motor unit configured to selectively rotate the rotating shaft.

8. The debris filtration apparatus according to claim 7 , wherein the motor unit is configured to rotate the rotating shaft connected to at least one or multiple ones of the first to n-th unit screens.

9. The debris filtration apparatus according to claim 1 , further comprising:
a differential pressure sensor installed in the chamber housing and configured to measure a pressure of the cooling water that passes through the screen unit.

10. The debris filtration apparatus according to claim 9 , wherein the differential pressure sensor comprises:
a first sensor disposed below the screen unit and configured to measure a pressure of the cooling water that is in a state before passing through the screen unit; and
a second sensor disposed over the screen unit and configured to measure a pressure of the cooling water that has passed through the screen unit.

11. The debris filtration apparatus according to claim 9 , wherein the differential pressure sensor comprises a plurality of differential pressure sensors disposed in the chamber housing at positions spaced apart from each other at regular intervals in a circumferential direction.

12. The debris filtration apparatus according to claim 1 , wherein each of the first to n-th unit screens protrudes in a polygonal shape upward between the adjacent ones of the first to n-th unit supports.

13. The debris filtration apparatus according to claim 1 , wherein each of the first to n-th unit screens comprises:
a protrusion part protruding from a central portion of an upper surface of the unit screen between the adjacent ones of the first to n-th unit supports; and
an extension part extending in a dome shape downward from each of left and right lower edges of the protrusion part.

14. The debris filtration apparatus according to claim 1 , wherein the first to n-th unit screens are formed in a dome shape from a circumference defined by outer ends of the first to n-th unit supports toward the support housing.

15. A debris filtration apparatus comprising:
a support unit including first to n-th unit supports arranged, to form a radial shape, in a circumferential direction around a support housing disposed on an upper portion of a rotor unit, the rotor unit being configured to rotate at a predetermined speed in a chamber housing;
a screen unit including first to n-th unit screens disposed between adjacent ones of the first to n-th unit supports and configured to filter out debris from cooling water; and
a bypass unit configured, when a load applied to the screen unit is increased to a predetermined level by debris deposited on the screen unit, to separately move each of the first to n-th unit screens toward an upper portion of the support housing and form a space for allowing the cooling water to flow therethrough.

16. The debris filtration apparatus according to claim 15 , wherein the bypass unit comprises:
a guide bar extending upward from the support housing, with an O-ring fitted over the guide bar;
a cylindrical movable body provided around the guide bar;
a connection plate having a first end fixed to the cylindrical movable body, and a second end divided toward the respective first to n-th unit screens and connected to the first to n-th unit screens; and
a connector inserted into the cylindrical movable body from an outside of the cylindrical movable body toward the guide bar and configured to be broken when a load applied to the screen unit is increased to the predetermined level by debris deposited on the screen unit.

17. The debris filtration apparatus according to claim 16 , wherein the connector comprises:
a reduced-diameter part formed such that a diameter thereof is reduced from opposite ends thereof to a medial portion with respect to a longitudinal direction of the connector.

18. The debris filtration apparatus according to claim 16 , wherein the bypass unit comprises:
a guide bar extending upward from the support housing, with an O-ring fitted over the guide bar;
a cylindrical movable body provided around the guide bar;
a unit connection plate having a first end fixed to the cylindrical movable body, and a second end divided toward the respective first to n-th unit screens and connected to the first to n-th unit screens; and
a motor unit configured to transmit a rotational force to a rotational force transmission part fixed on an outer surface of the cylindrical movable body and selectively move the cylindrical movable body upward or downward.

19. The debris filtration apparatus according to claim 16 , further comprising:
a differential pressure sensor installed in the chamber housing and configured to measure pressures of the cooling water before passing through the screen unit and after having passing through the screen

Assignees

• Doosan Heavy Ind & Construction Co Ltd

Inventors

• Kim Ki Youl

Classifications

• B01D33/15

  with rotary plane filtering surfaces · CPC title

• B01D35/147

  Bypass or safety valves · CPC title

• B01D29/11

  with bag, cage, hose, tube, sleeve or like filtering elements · CPC title

• B01D35/00

  Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions · CPC title

• B01D35/02

  Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, (B01D35/05 takes precedence; {water pipe system filters E03B3/18, E03B7/07; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C1/26; suction strainers or filters for pumps F04B53/005, F04D29/70}) · CPC title