Self-cleaning screen assembly for filtering irrigation water
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-033/073
B01D-033/50
B01D-033/80
B01D-035/05
B01D-033/06
출원번호
US-0072468
(2011-03-25)
등록번호
US-8652324
(2014-02-18)
발명자
/ 주소
Wietharn, Robert J.
출원인 / 주소
Wietharn, Robert J.
대리인 / 주소
Thompson, Jeffrey L.
인용정보
피인용 횟수 :
1인용 특허 :
11
초록▼
A self-cleaning screen includes a rotatable drum made of mesh material and an inlet pipe extending through a front end of the drum. A flotation structure supports the drum with the inlet pipe and the lower part of the drum submerged during use. A cleaning spray system located within the drum receive
A self-cleaning screen includes a rotatable drum made of mesh material and an inlet pipe extending through a front end of the drum. A flotation structure supports the drum with the inlet pipe and the lower part of the drum submerged during use. A cleaning spray system located within the drum receives cleaning water through a hollow shaft supporting a rear end of the drum. Spray nozzles located within an upper part of the drum above the water level direct the cleaning water radially outward to dislodge debris from the screen. The front end of the drum includes an annular ring and a rubber seal extending radially inwardly from the annular ring to engage the inlet pipe. A drive belt extends around the annular ring to rotate the drum. A plurality of rollers engage an outer surface of the annular ring to support the drum for rotation about a horizontal axis.
대표청구항▼
1. A self-cleaning screen assembly, comprising: a rotatable drum comprising a screen for removing debris from water as the water passes into the drum, said rotatable drum having a front end and a rear end, and said screen extending between said front and rear ends;an inlet pipe that passes through s
1. A self-cleaning screen assembly, comprising: a rotatable drum comprising a screen for removing debris from water as the water passes into the drum, said rotatable drum having a front end and a rear end, and said screen extending between said front and rear ends;an inlet pipe that passes through said front end of the rotatable drum, said inlet pipe having at least one inlet opening for receiving screened water from within the drum; anda seal means provided between said front end of the rotatable drum and an outer surface of said inlet pipe for preventing unscreened water and debris from passing into the drum, said seal means comprising a flap secured to said front end of the rotatable drum, said flap being arranged to extend radially inwardly to maintain contact with an outer surface of the inlet pipe as the drum rotates relative to the inlet pipe;wherein said front end of the drum comprises an end face, an annular ring protruding in an axial direction from an inner periphery of said end face, said annular ring being coaxial with an axis of rotation of the drum, and said flap extending radially inwardly from said annular ring to maintain a seal between said drum and an outer surface of said inlet pipe; andfurther comprising a support structure for rotatably supporting said front end of the rotatable drum, said support structure comprising a plurality of rollers that engage and support a surface of said annular ring to allow said drum to rotate about a horizontal axis while being supported by said rollers. 2. The self-cleaning screen assembly according to claim 1, wherein said flap is a flexible rubber flap. 3. The self-cleaning screen assembly according to claim 1, wherein said rollers comprise a first pair of rollers arranged above said horizontal axis of rotation of said drum, and a second pair of rollers arranged below said horizontal axis. 4. The self-cleaning screen assembly according to claim 1, further comprising a drive assembly for rotatably driving said drum during operation, said drive assembly comprising an endless belt extending around an outer surface of said annular ring and a drive pulley. 5. The self-cleaning screen assembly according to claim 1, wherein said surface of said annular ring comprises an outer surface of said annular ring. 6. A self-cleaning screen assembly, comprising: a rotatable drum comprising a screen for removing debris from water as the water passes into the drum, said rotatable drum having a front end and a rear end, and said screen extending between said front and rear ends;a support structure for rotatably supporting said rotatable drum for rotation about a horizontal axis;an inlet pipe that passes through said front end of the rotatable drum, said inlet pipe having at least one inlet opening for receiving screened water from within the drum;a flotation means for supporting said support structure and said rotatable drum in a water source with said horizontal axis of rotation located below a normal water level so that said inlet pipe and a lower part of the rotatable drum are completely submerged and an upper part of the drum remains above said normal water level; anda cleaning spray system positioned within said rotatable drum, said cleaning spray system comprising a plurality of spray nozzles located within said drum directed to spray water in a radially outward direction to dislodge debris stuck to the screen, said spray nozzles being located above the normal water level in said drum so that cleaning water can be sprayed in the atmosphere above the water level. 7. The self-cleaning screen assembly according to claim 6, wherein said flotation means is made to support said rotatable drum with approximately 70% of the drum submerged in the water source. 8. The self-cleaning screen assembly according to claim 6, wherein said screen comprises a mesh material having 150 mesh or smaller openings. 9. The self-cleaning screen assembly according to claim 6, further comprising a seal means provided between said front end of the rotatable drum and an outer surface of said inlet pipe for preventing unscreened water and debris from passing into the drum, said seal means comprising a flap secured to said front end of the rotatable drum, said flap being arranged to extend radially inwardly to maintain contact with an outer surface of the inlet pipe as the drum rotates relative to the inlet pipe. 10. The self-cleaning screen assembly according to claim 9, wherein said front end of the drum comprises an end face, an annular ring protruding in an axial direction from an inner periphery of said end face, said annular ring being coaxial with an axis of rotation of the drum, and said flap extending radially inwardly from said annular ring to maintain a seal between said drum and an outer surface of said inlet pipe. 11. The self-cleaning screen assembly according to claim 10, further comprising a drive assembly for rotatably driving said drum during operation, said drive assembly comprising an endless belt extending around an outer surface of said annular ring and a drive pulley. 12. The self-cleaning screen assembly according to claim 6, wherein said surface of said annular ring comprises an outer surface of said annular ring. 13. A self-cleaning screen assembly, comprising: a rotatable drum comprising a screen for removing debris from water as the water passes into the drum, said rotatable drum having a front end and a rear end, and said screen extending between said front and rear ends;an inlet pipe that passes through said front end of the rotatable drum, said inlet pipe having at least one inlet opening for receiving screened water from within the drum;a flotation means for supporting said rotatable drum in a water source so that said inlet pipe and a lower part of the rotatable drum are submerged and an upper part of the drum remains above a normal water level;a cleaning spray system positioned within said rotatable drum, said cleaning spray system comprising a plurality of spray nozzles located within said drum directed to spray water in a radially outward direction to dislodge debris stuck to the screen, said spray nozzles being located above the normal water level in said drum so that cleaning water can be sprayed in the atmosphere above the water level;a seal means provided between said front end of the rotatable drum and an outer surface of said inlet pipe for preventing unscreened water and debris from passing into the drum, said seal means comprising a flap secured to said front end of the rotatable drum, said flap being arranged to extend radially inwardly to maintain contact with an outer surface of the inlet pipe as the drum rotates relative to the inlet pipe;wherein said front end of the drum comprises an end face, an annular ring protruding in an axial direction from an inner periphery of said end face, said annular ring being coaxial with an axis of rotation of the drum and said flap extending radially inwardly from said annular ring to maintain a seal between said drum and an outer surface of said inlet pipe; andfurther comprising a support structure for rotatably supporting said front end of the rotatable drum, said support structure comprising a plurality of rollers that engage and support a surface of said annular ring to allow said drum to rotate about a horizontal axis while being supported by said rollers. 14. The self-cleaning screen assembly according to claim 13, wherein said rollers comprise a first pair of rollers arranged above said horizontal axis of rotation of said drum, and a second pair of rollers arranged below said horizontal axis. 15. A self-cleaning screen assembly, comprising: a rotatable drum comprising a screen for removing debris from water as the water passes into the drum, said rotatable drum having a front end and a rear end, and said screen extending between said front and rear ends;an inlet pipe that passes through said front end of the rotatable drum, said inlet pipe having at least one inlet opening for receiving screened water from within the drum;said front end of the drum comprising an end face, an annular ring protruding in an axial direction from an inner periphery of said end face, said annular ring being coaxial with an axis of rotation of the drum, and a seal means extending radially inwardly from said annular ring to maintain a seal between said drum and an outer surface of said inlet pipe; anda support structure for rotatably supporting said front end of the rotatable drum, said support structure comprising a plurality of rollers that engage and support a surface of said annular ring to allow said drum to rotate about a horizontal axis while being supported by said rollers. 16. The self-cleaning screen assembly according to claim 15, further comprising a drive assembly for rotatably driving said drum during operation, said drive assembly comprising an endless belt extending around an said outer surface of said annular ring and a drive pulley. 17. The self-cleaning screen assembly according to claim 15, wherein said rollers comprise a first pair of rollers arranged above said horizontal axis of rotation of said drum, and a second pair of rollers arranged below said horizontal axis. 18. The self-cleaning screen assembly according to claim 15, further comprising a flotation means for supporting said rotatable drum in a water source so that said inlet pipe and a lower part of the rotatable drum are submerged and an upper part of the drum remains above a normal water level, and further comprising a cleaning spray system positioned within said rotatable drum, said cleaning spray system comprising a plurality of spray nozzles located within said drum directed to spray water in a radially outward direction to dislodge debris stuck to the screen, said spray nozzles being located above the normal water level in said drum so that cleaning water can be sprayed in the atmosphere above the water level. 19. The self-cleaning screen assembly according to claim 15, wherein said screen comprises a mesh material having 150 mesh or smaller openings. 20. The self-cleaning screen assembly according to claim 15, wherein said surface of said annular ring comprises an outer surface of said annular ring.
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이 특허에 인용된 특허 (11)
Richardson Harry L. (19710 Pinehurst La. Salinas CA 93901), Filter for ditch pumps.
Stoneburner James O. ; Wilkins Charles A. ; Wilkins Thomas R., Self-cleaning strainer having rotating strainer frame assembly journaled on central core by sets of wheels.
Wilkins Thomas R. (Ann Arbor MI) Wilkins Charles A. (Ann Arbor MI) Stoneburner James O. (Ann Arbor MI), Use of a multi-apertured plastic pipe in the drive and structure of a rotary self-cleaning strainer.
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