Device for continuously weighing a flowing bulk material exiting a conveyor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01G-013/18
G01F-001/30
출원번호
US-0103480
(2011-05-09)
등록번호
US-8735745
(2014-05-27)
우선권정보
AR-2010 0102889 (2010-08-06)
발명자
/ 주소
Rossi, Hector Claudio
출원인 / 주소
Rossi, Hector Claudio
대리인 / 주소
Porzio, Bromberg & Newman, P.C.
인용정보
피인용 횟수 :
1인용 특허 :
7
초록▼
A weighing device for a bulk material conveyor, of the type that is included in the output of a tube for conveying a flow of bulk material, the device conducting the flow through the output and weighing in real time the amount of bulk material passing through the device, with the device comprising a
A weighing device for a bulk material conveyor, of the type that is included in the output of a tube for conveying a flow of bulk material, the device conducting the flow through the output and weighing in real time the amount of bulk material passing through the device, with the device comprising a load cell that is connected between a stationary plate and a movable plate, and a rotation sensor that records the revolutions of a rotating reference device that rotates under the effect of the flow of the bulk material passing through the weighing device.
대표청구항▼
1. A weighing device for a bulk material conveyor, the weighing device being arranged in a location where bulk material is flowing comprising: a bottom plate stationary relative to said bulk material conveyor,an upper movable plate disposed above said bottom plate whereby the bulk material flows on
1. A weighing device for a bulk material conveyor, the weighing device being arranged in a location where bulk material is flowing comprising: a bottom plate stationary relative to said bulk material conveyor,an upper movable plate disposed above said bottom plate whereby the bulk material flows on the upper movable plate,at least one load cell connected to said bottom plate and to said upper movable plate,a rotating reference member for contact with bulk material flow;a sensor member operatively connected to the rotating reference member;a data processing circuit operatively connected to said at least one load cell and to said sensor member, anda deflector plate at an entrance towards the upper movable plate with the deflector plate having an upper edge hinged to a rotation axis and a bottom edge positioned close to and above the upper movable plate. 2. A weighing device for a bulk material conveyor according to claim 1, wherein said weighing device is arranged at an output of a tube of the bulk material conveyor, and said rotating reference member is selected from the group consisting of a worm screw in the interior of said tube, a rotor with rotating radial blades, a paddle wheel, and combinations thereof. 3. A weighing device for a bulk material conveyor according to claim 2, wherein said sensor member detects rotation of the rotating reference member caused by flow of bulk material, and is a rotary transducer operatively connected to at least one of the following: said paddle wheel, said worm screw, said rotor with rotating radial blades and combinations thereof. 4. A weighing device for a bulk material conveyor according to claim 1, further comprising at least one spacer arranged between said stationary bottom plate and said upper movable plate without interfering with the movement of the upper movable plate transferring weight to said at least one load cell. 5. A weighing device for a bulk material conveyor according to claim 1, further comprising a header closed from above by a closing plate. 6. A weighing device for a bulk material conveyor according to claim 1, wherein said upper movable plate has at least one flat portion. 7. A weighing device for a bulk material conveyor according to claim 1, wherein said upper movable plate has at least one curved portion. 8. A weighing device for a bulk material conveyor according to claim 7, wherein said rotating reference member is said rotor with rotating radial blades which are spaced apart and said rotor has a rotary shaft, and said curved portion extends concentrically to the rotary shaft and at least along the space between two adjacent blades. 9. A weighing device for a bulk material conveyor according to claim 2, further comprising a longitudinal axis and a discharge output, and wherein said rotating reference member is said paddle wheel and is arranged close to the discharge output and said sensor member is operatively connected to said paddle wheel, and wherein the paddle wheel extends transversely to said longitudinal axis, said paddle wheel being adjacent to said upper movable plate which defines a path for the flow of bulk material being unloaded and said paddle wheel has a plurality of paddles extending through said path for the flow of bulk material and for rotating according to the flow of the bulk material. 10. A weighing device for a bulk material conveyor according to claim 9, wherein said paddle wheel has a shaft. 11. A weighing device for a bulk material conveyor according to claim 10, wherein said shaft of said paddle wheel has one end mounted on a side plate and an opposite end mounted on an opposite side plate, the two side plates and the bottom plate forming a body of the weighing device. 12. A weighing device for a bulk material conveyor according to claim 11, wherein said upper movable plate and said paddle wheel are separated by an intermediate panel, wherein said upper movable plate and said intermediate panel define said path for the flow of bulk material. 13. A weighing device for a bulk material conveyor according to claim 12, wherein said paddle wheel is made from a metallic material. 14. A weighing device for a bulk material conveyor according to claim 1, wherein said rotation axis has an end mounted on a side plate arranged at each side of the upper movable plate. 15. A weighing device for a bulk material conveyor according to claim 14, wherein said deflector plate has a spring between said upper edge of the deflector plate and said rotation axis. 16. A weighing device for a bulk material conveyor according to claim 1 wherein said load cell measures weight of material on said upper movable plate and said rotating reference member and sensor measures the rate of flow of material over the upper movable plate, said weight and said rate being communicated to said data processing circuit. 17. A weighing device for a bulk material conveyor according to claim 16, wherein said data processing circuit processes said weight and said rate information to calculate the Total Mass of the Flowing Material (M) in accordance with: M=∑n=02kn·∑i=0f(ti)n·ΔmBalanza(ti)+f(ti-1)n·ΔmBalanza(ti-1)(Formula15) where; kn=three adjustable calibration constants;f=rotations per minute of the rotating reference member; andΔm=the weight sensed by said load cell for each converted analog to digital signal at a sensing time “i”. 18. A dynamic weighing device for a bulk material conveyor, the weighing device being arranged in a location where bulk material is flowing, for continuously weighing material in real time, comprising: (a) a pair of spaced side plates which are connectible to said bulk material conveyor;(b) a bottom plate stationary relative to said bulk material conveyor;(c) an upper movable plate disposed above said bottom plate whereby the bulk material flows on the upper movable plate;(d) at least one load cell connected to said bottom plate and to said upper movable plate;(e) a rotating reference member for contact with bulk material flow;(f) a sensor member operatively connected to the rotating reference member,(g) a data processing circuit operatively connected to said at least one load cell and to said sensor member, and(h) a deflector plate at an entrance towards the upper movable plate with the deflector plate having an upper edge hinged to a rotation axis and a bottom edge positioned close to and above the upper movable plate. 19. A dynamic weighing device for a bulk material conveyor, the weighing device being arranged in a location where bulk material is flowing, for continuously weighing material in real time, comprising: (a) a pair of spaced side plates which are connectible to said bulk material conveyor;(b) a bottom plate stationary relative to said bulk material conveyor;(c) an upper movable plate disposed above said bottom plate whereby the bulk material flows on the upper movable plate;(d) a deflector plate mounted near the entrance of the upper movable plate for controlling the direction of the flowing bulk material and for minimizing wave behavior of the flowing bulk material;(e) at least one load cell connected to said bottom plate and to said upper movable plate, said load cell measuring weight of material on the upper movable plate;(f) a rotating reference member for contact with bulk material flow;(g) a sensor member operatively connected to the rotating reference member, whereby said sensor and rotating reference member measure the rate of material flowing over the upper movable plate; and(h) a data processing circuit operatively connected to said at least one load cell and to said sensor member for determining the total mass of material output from the conveyor based on the weight of material on the upper movable plate at one or more sensing times and the rate of flow of material.
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