Patent Application
20090057350
1. Field of the Invention
This invention relates to a feed hopper system, more particularly to a feed hopper system including first and second blades alternately disposed on a rotor.
2. Description of the Related Art
Conventional feed hopper systems for a furnace normally include a hopper defining a chamber adapted to receive a particulate material therein and having a lower portion, a stirring member extending through the lower portion of the chamber, and a rotary feeding member disposed below the stirring member, mounted rotatably in the lower portion of the chamber of the hopper, and including a rotor that is rotatable relative to the hopper. The rotary feeding member further includes a plurality of angularly spaced apart blades radiating from the rotor. A feed conveying tube is connected to a blower and a bottom of the hopper, and is in fluid communication with the lower portion of the chamber of the hopper.
In operation, the particulate material is stirred by the stirring member driven by a motor so as to be able to slide downwardly into gaps among the blades of the rotary feeding member which are disposed at an upper position, is subsequently carried by the corresponding blades to a lower position so as to be able to fall by virtue of gravity into the feed conveying tube, and is then carried away by an air flow generated by the blower to the furnace for combustion. Since the space between each two adjacent ones of the blades of the rotary feeding member is relatively large, an undesired discontinuity in feeding the particulate material into the feed conveying tube occurs, which can result in an adverse effect on the combustion efficiency.
Therefore, the object of the present invention is to provide a feed hopper system that can overcome the aforesaid drawback associated with the prior art.
According to the present invention, a feed hopper system comprises: a hopper defining a chamber adapted to receive a particulate material therein, the chamber having a lower portion; a stirring member extending through the lower portion of the chamber of the hopper for stirring the particulate material; and a rotary feeding member disposed below the stirring member, mounted rotatably in the lower portion of the chamber of the hopper, and including a rotor that is rotatable relative to the hopper and that has first and second axial end portions. The rotary feeding member further includes a plurality of angularly spaced apart first blades that radiate from the first axial end portion of the rotor, and a plurality of angularly spaced apart second blades that radiate from the second axial end portion of the rotor. The first and second blades are alternately disposed.
In drawings which illustrate an embodiment of the invention,
The feed hopper system includes: a hopper 2 defining a chamber 21 adapted to receive the particulate material therein, the chamber 21 having a lower portion 22; a stirring member 42 extending through the lower portion 22 of the chamber 21 of the hopper 2 for stirring the particulate material; and a rotary feeding member 3 disposed below the stirring member 42, mounted rotatably in the lower portion 22 of the chamber 21 of the hopper 2, and including a rotor 30 that is rotatable relative to the hopper 2 and that has first and second axial end portions 301, 302. The rotary feeding member 3 further includes a plurality of angularly spaced apart first blades 32 that radiate from the first axial end portion 301 of the rotor 30, and a plurality of angularly spaced apart second blades 33 that radiate from the second axial end portion 302 of the rotor 30. The first and second blades 32, 33 are alternately disposed (see
The feed hopper system further includes a driving shaft 31 extending through the lower portion 22 of the chamber 21. The rotor 30 is sleeved securely on and is driven by the driving shaft 31.
The rotary feeding member 3 further includes a partitioning plate 34 that radiates from the rotor 30 and that separates the first blades 32 from the second blades 33. Each of the first and second blades 32, 33 includes a rigid plate 321, 331 that has a free end 3211, 3311, and an elastic pad 322, 332 attached to the free end 3211, 3311 of the rigid plate 321, 331. The lower portion 22 of the chamber 21 of the hopper 2 is defined by a lower wall portion 23 of the hopper 2. The elastic pad 322, 332 of each of the first and second blades 32, 33 is in sliding contact with the lower wall portion 23 of the hopper 2.
A motor 41 is connected to the driving shaft 31 for driving the stirring member 42 and the rotary feeding member 3. The driving shaft 31 is connected to a shaft 421 of the stirring member 42 through a transmission unit 43 so as to permit co-rotation of the stirring member 42 and the rotary feeding member 3. A feed conveying tube 51 is connected to the lower portion 22 of the chamber 21 of the hopper 2. A blower 52 is connected to the feed conveying tube 51.
When the motor 41 is actuated, the stirring member 42 and the rotary feeding member 3 are driven to rotate, and the particulate material is carried from the chamber 21 of the hopper 2 into the feed conveying tube 51, and is subsequently carried away by an air flow generated by the blower 52 to the furnace (not shown).
By virtue of the arrangement of the first and second blades 32, 33 on the rotor 30, the aforesaid discontinuity problem in feeding the particulate material from the hopper 2 into the feed conveying tube 51 can be considerably alleviated.
With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the spirit of the present invention. It is therefore intended that the invention be limited only as recited in the appended claims.
