Spiral scale

Abstract

The invention relates to a spiral scale, which has a speed reducer, a spiral cylinder and a weighing mechanism; the rotating shaft of the speed reducer is connected with the screw shaft in the spiral cylinder; the spiral cylinder is provided with a feed port and a discharge port connected with the spiral cylinder ; There is an integrated spiral blade on the circumferential surface of the screw shaft; the weighing mechanism is arranged under the screw cylinder through a pressure sensor and a connecting plate with a lever fulcrum; there is a pushing mechanism directly above the discharge port of the spiral cylinder discharge end; the pushing mechanism It includes a push connecting rod, a piston block and a connecting block; the connecting block has two pieces, which are arranged side by side, and the connecting block and the screw shaft are fixed; one end of the pushing connecting rod is hinged to the two connecting blocks through a pin at the same time; the piston block and the pushing The other end of connecting rod is fixedly connected. In the present invention, since the piston block is constantly reciprocating, the wind pressure at the discharge port of the spiral cylinder can be constantly changed, and the material can be pushed, so that the material in the spiral cylinder can flow out smoothly and prevent accumulation.

Description

technical field [0001] The invention relates to dynamic metering equipment for powder materials, in particular to a screw scale. Background technique [0002] The metering screw scale is based on the working principle of the constant speed quantitative feeding scale. It is a mechatronic equipment designed and developed that integrates conveying, weighing measurement and quantitative feeding control. It is widely used in building materials, metallurgy, chemical industry, electric power and other industries. In the flow metering and batching system of non-viscous powder and granular materials in the production department. [0003] At present, the structure of the metering screw scale is simple and the cost is low, but it is greatly affected by the positive or negative pressure wind at the discharge port, that is: when the discharge port has a positive or negative pressure wind, the powder in the screw will The flow velocity of the body is disturbed, and the relationship betwe...

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of the metering screw scale is simple and the cost is low, but it is greatly affected by the positive or negative pressure wind at the discharge port, that is: when the discharge port has a positive or negative pressure wind, the powder in the screw will The flow velocity of the body is disturbed, and the relationship between the material flow velocity and the motor speed is nonlinear, which will affect the measurement accuracy

In addition, the powdery material often produces rushing phenomenon during the flow, which makes the powdery material out of control, produces a large amount of gushing flow, affects normal production, reduces product quality, and even damages equipment

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