Dynamic metering device of powdery material
A technology for dynamic metering and powdery materials, applied in measuring devices, weighing equipment for continuous material flow, weighing equipment for automatic feeding/discharging, etc. problem, to achieve the effect of strong applicability, simple structure and low cost
Inactive Publication Date: 2007-05-30
WUHAN UNIV OF SCI & TECH
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Problems solved by technology
In particular, the bulk cement to be used in building construction requires a large amount of use, requiring fast measurement speed, and the cement is seriously polluted to the environment and sensitive to humidity in the air. At present, most users at home and abroad use sensor electronics. Static metering of scales or static metering of fast sensors, such as "an automatic metering device for powdery materials" (ZL97209417.2), the accuracy of metering is limited; Continuous powder dispensing installation with flow regulatory circuit-computes rate of delivery from continuous weighings inconjunction with powder density and controlled duct characteristics (WO9007740), because there is no constant pressure mechanism, the accuracy is affected; "New Rotor Measuring Scale" (CN89219398.0) adopts a load cell that has high environmental requirements, high cost, and slow speed; Germany Pf Company products, Chinese patents, their shortcoming is that the speed is slow
There are also literatures that propose to measure the weight of powdery materials according to their volume, but because the bulk specific gravity of most powdery materials is not constant, such as the bulk specific gravity of cement is 0.9T / m 3 ~1.7T / m 3 , but it is difficult to apply to the measurement of different types of powder materials
Method used
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[0011] In this embodiment, as shown in Figure 1, an auger propeller 9 is installed in a moving fit at the center line of the housing 8, the right end of the auger propeller 9 is installed on the right end of the housing 8, and the left end of the auger propeller 9 is installed At the center of the resistance net 7, the auger propeller 9 is driven by the motor 11 through the transmission system 12, and a photoelectric sensor 13 is installed at the right end of the shaft of the auger propeller 9, and the photoelectric sensor 13 is connected with the computer control system 2; the resistance net 7 is located on the right side of the discharge port 18 and is fixed on the inner circle of the housing 8, and the constant pressure door 6 is installed on the left side of the discharge port 18.
[0012] In the above-mentioned embodiment: the propelling surface of the auger propeller 9 is a helical surface with variable pitch, and the outer circle of the helicoidal surface and the inner c...
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A device for dynamic metering of powder material is featured as setting capstan propeller at center line of shell in movable fit and its right end at right end of shell, its left end at center of resistance screen, its driving system driven by motor, its shaft right end set with photoelectric sensor and its shaft set with high-frequency microvibrating device; setting resistance screen at right side of material outlet which has constant pressure gate at left side, and connecting photoelectric sensor to computer system.
Description
1. Technical field [0001] The invention belongs to an automatic metering device for powdery materials, in particular to an automatic metering device for powdery materials in a flowing state. 2. Technical background [0002] A large amount of powdery materials are used in industrial production and engineering construction. In particular, the bulk cement to be used in building construction requires a large amount of use, requiring fast measurement speed, and the cement is seriously polluted to the environment and sensitive to humidity in the air. At present, most users at home and abroad use sensor electronics. Static metering of scales or static metering of fast sensors, such as "an automatic metering device for powdery materials" (ZL97209417.2), the accuracy of metering is limited; Continuous powder dispensing installation with flow regulatory circuit-computes rate of delivery from continuous weighings inconjunction with powder density and controlled duct characteristics (W...
Claims
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IPC IPC(8): G01G11/00G01G13/02B65G33/22
Inventor 周鼎林又红
Owner WUHAN UNIV OF SCI & TECH