Material conveying device of automatic powder material weighing machine
阅读说明:本技术 粉料自动秤料机输料装置 (Material conveying device of automatic powder material weighing machine ) 是由 王智慧 莫睿 余晓明 张延军 周志成 骆颖 罗文来 李运海 于 2020-08-04 设计创作,主要内容包括:本发明公开了一种粉料自动秤重机输料装置,包括基于储料箱设置的搅拌机构和螺旋输送机构,储料箱包括斗形箱体和设于斗形箱体上口的箱盖,斗形箱体的下口为出料口,搅拌机构包括同轴设于斗形箱体内的搅拌轴,搅拌轴的上端通过万向联轴器连接设于箱盖上的变频调速电机的转轴,搅拌轴的轴体上设有偏心的偏心搅拌桨;螺旋输送机构包括设于输送管内的螺旋传料杆,输送管同轴设于储料箱的出料口,螺旋传料杆的上端连接搅拌轴。本发明解决了传统技术中粉料秤重精度低和秤重效率差的技术问题,结构简单,制造成本低。(The invention discloses a material conveying device of an automatic powder weighing machine, which comprises a stirring mechanism and a spiral conveying mechanism which are arranged based on a material storage box, wherein the material storage box comprises a bucket-shaped box body and a box cover arranged at the upper opening of the bucket-shaped box body, the lower opening of the bucket-shaped box body is a material outlet, the stirring mechanism comprises a stirring shaft coaxially arranged in the bucket-shaped box body, the upper end of the stirring shaft is connected with a rotating shaft of a variable-frequency speed regulating motor arranged on the box cover through a universal coupling, and an eccentric stirring paddle is arranged on the shaft body of the stirring shaft; the spiral conveying mechanism comprises a spiral conveying rod arranged in a conveying pipe, the conveying pipe is coaxially arranged at a discharge port of the storage box, and the upper end of the spiral conveying rod is connected with a stirring shaft. The invention solves the technical problems of low powder weighing precision and poor weighing efficiency in the traditional technology, and has simple structure and low manufacturing cost.)
1. Powder automatic weighing machine feeding device, include rabbling mechanism and screw feed mechanism based on storage case (1) sets up, storage case (1) is including fill shape box and the case lid of locating fill shape box suitable for reading, the end opening of fill shape box is discharge gate, its characterized in that:
the stirring mechanism comprises a stirring shaft (2) coaxially arranged in the hopper-shaped box body, the upper end of the stirring shaft (2) is connected with a rotating shaft of a variable-frequency speed-regulating motor (4) arranged on the box cover through a universal coupling (6), and an eccentric stirring paddle (5) is arranged on a shaft body of the stirring shaft (2);
the spiral conveying mechanism comprises a spiral conveying rod (8) arranged in a conveying pipe (7), the conveying pipe (7) is coaxially arranged at a discharge port of the storage box (1), and the upper end of the spiral conveying rod (8) is connected with a stirring shaft (2).
2. The conveying device of an automatic powder weighing machine according to claim 1, characterized in that: the unilateral clearance between the spiral material conveying rod (8) and the conveying pipe (7) is 0.5-2 mm.
3. The conveying device of the automatic powder weighing machine of claim 2, which is characterized in that: the spiral material conveying rod (8) is a single-head screw or a double-head screw, and the helix angle of the spiral material conveying rod is 7-20 degrees.
4. The conveying device of the automatic powder weigher as claimed in any one of claims 1 to 3, which is characterized in that: the spiral material conveying rod (8) is embedded into the stirring shaft (2) and is locked in position by a pin with threads.
5. The conveying device of the automatic powder weigher as claimed in any one of claims 1 to 3, which is characterized in that: the universal coupling (6) is a WSD type cross shaft type coupling.
6. The conveying device of the automatic powder weigher as claimed in any one of claims 1 to 3, which is characterized in that: the eccentric stirring paddle (5) is a frame-shaped frame.
7. The conveying device of the automatic powder weigher as claimed in any one of claims 1 to 3, which is characterized in that: the upper end of the stirring shaft (2) is connected with an output shaft of a speed reducer (3) arranged on the box cover through a universal coupling (6), and an input shaft of the speed reducer (3) is connected with a rotating shaft of a variable-frequency speed-regulating motor (4).
Technical Field
The invention relates to a weighing device in an instrument, in particular to a material conveying device of an automatic powder weighing machine.
Background
At present, a material conveying device for an automatic material weighing machine for small-weight powder is mainly of a belt transmission structure, namely, a motor is used for driving a material conveying belt to rotate or a vibrator is used for driving a material conveying plate to vibrate, so that the purpose of conveying materials for the automatic material weighing machine is achieved.
The invention with application number 201410031741.6 applies for a semi-automatic weighing machine for weighing melamine and the utility model with application number 201420043045.2 applies for a storage and metering screw device for a semi-automatic weighing machine for weighing melamine, because the power problem of material conveying is not solved, the powder material can not be actually conveyed, and therefore the powder material can not be converted into a product.
The traditional belt transmission structure (belt or plate material transmission device) is complex in structure and high in cost; when the material weighing precision is required to be higher, the material weighing efficiency of the belt transmission structure is very low.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a material conveying device of an automatic powder weighing machine.
Can solve the automatic weighing machine feeding device of powder of prior art problem, its technical scheme includes rabbling mechanism and screw conveyor based on the storage case setting, the storage case includes fill shape box and locates the case lid of fill shape box suitable for reading, the end opening of fill shape box is the discharge gate, and what the institute differed is:
1. the stirring mechanism comprises a stirring shaft coaxially arranged in the hopper-shaped box body, the upper end of the stirring shaft is connected with a rotating shaft of a variable-frequency speed-regulating motor arranged on the box cover through a universal coupling, and an eccentric stirring paddle is arranged on a shaft body of the stirring shaft.
2. The spiral conveying mechanism comprises a spiral material conveying rod arranged in a conveying pipe, the conveying pipe is coaxially arranged at a discharge port of the material storage box, and the upper end of the spiral material conveying rod is connected with a stirring shaft.
Among the above-mentioned structure, eccentric settings's rabbling mechanism makes conveyer pipe and spiral biography material pole be in the vibration state (spiral biography material pole striking conveyer pipe and produce the vibration, makes the powder become the kinetic friction motion by static friction motion along the helicoid), and screw feed mechanism adopts perpendicular mounting means, and the weighing in-process, the gravity of powder and conveyer pipe and the vibration of spiral biography material pole provide transmission power for the powder transmission.
Under the control of the variable-frequency speed regulating motor, when weighing is started, the vibration frequency is high, the powder conveying efficiency is high, and before weighing is finished, the vibration frequency is low, and the weighing precision is high.
In order to obtain a larger vibration effect, the unilateral clearance between the spiral material conveying rod and the conveying pipe is designed to be 0.5-2 mm, the clearance is too small, the vibration is not obvious, and the powder can leak when the clearance is too large.
The spiral material conveying rod adopts a single-head screw or a double-head screw, and in order to control the powder material conveying, the helix angle of the screw is designed to be 7-20 degrees (smaller than the static friction angle of the powder material and larger than the dynamic friction angle of the powder material).
In order to facilitate replacement of the vulnerable spiral material conveying rod, the spiral material conveying rod is embedded into the stirring shaft and is locked in position by a pin with threads.
The universal coupling preferably adopts a WSD type cross shaft type coupling.
In order to reduce the resistance in the stirring process, the eccentric stirring paddle is designed into a frame-shaped frame.
Furthermore, the upper end of the stirring shaft is connected with a reducer output shaft arranged on the box cover through a universal coupling, and the reducer output shaft is connected with a rotating shaft of a variable-frequency speed-regulating motor.
The invention has the beneficial effects that:
1. the material conveying device of the automatic powder weighing machine solves the technical problems of low powder weighing precision and poor weighing efficiency in the traditional technology, and has simple material conveying structure and low manufacturing cost; the problem of insufficient transmission power in the patent application numbers 201410031741.6 and 201420043045.2 is solved.
2. The invention is suitable for automatic weighing of various mixed powder in a small weight range, and can be used for automatic weighing of single powder or mixed powder such as powder metallurgy powder, superhard material tool powder, pharmacy and the like.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
And (3) identifying the figure number: 1. a material storage box; 2. a stirring shaft; 3. a speed reducer; 4. a variable frequency speed regulating motor; 5. an eccentric stirring paddle; 6. a universal coupling; 7. a delivery pipe; 8. a screw material conveying rod; 9. and (4) supporting the base.
Detailed Description
The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.
The invention relates to a material conveying device of an automatic powder weighing machine, which comprises a stirring mechanism, a power mechanism and a spiral conveying mechanism which are arranged based on a
The
The stirring mechanism comprises a stirring
The power mechanism comprises a variable-frequency speed-regulating
Screw conveying mechanism includes
The unilateral clearance between the spiral material conveying rod 8 and the
The
The
The eccentric stirring paddle 5 has the following functions: when the variable-frequency
In order to enable the spiral material conveying rod 8 to generate larger impact force in the material weighing process, a single-side gap of 0.5-2 mm is kept between the spiral material conveying rod 8 and the
The variable-frequency
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