Spiral scale

Abstract

The invention relates to a spiral scale which is provided with a reduction box, a spiral barrel and a weighing mechanism. A rotating shaft of the reduction box is connected with a spiral shaft in the spiral barrel; the spiral barrel is provided with a feeding opening and a discharging opening which are communicated with the spiral barrel; an integrated helical blade is arranged on the peripheral face of the spiral shaft; the weighing mechanism is arranged below the spiral barrel through a pressure sensor and a connecting plate with a lever fulcrum; a pushing mechanism is arranged over the position of the discharging opening at the discharging end of the spiral barrel; the pushing mechanism comprises a pushing connecting rod, a piston block and connecting blocks; the two connecting blocks are arranged in parallel, and the connecting blocks and the spiral shaft are fixed; one end of the pushing connecting rod is hinged to the two connecting blocks through a pin shaft simultaneously; and the piston block is fixedly connected with the other end of the pushing connecting rod. According to the spiral scale, the piston block does reciprocating motion continuously, and therefore the pressure intensity of wind power at the discharging opening of the spiral barrel can be changed without stop, the pushing effect on materials is achieved, materials in the spiral barrel smoothly flow out, and accumulation is prevented.

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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