CN106044279A - Fixed-quantity intermittent conveying device for granular materials and measurement unloading method thereof - Google Patents

Abstract

A quantitative intermittent conveying device for powder and granular materials and a method for metering and unloading thereof, comprising a hopper (1), a rotating metering wheel (3) and an intermittent drive mechanism (4), and the rotating metering wheel (3) includes a sleeve-shaped wheel body (3.1), the main body of the wheel includes a suspended end, the inner wall of the suspended end is integrally formed with an inner ring part (3.2), and a plurality of metering grooves (3.3) are evenly spaced along the outer circumference of the suspended end, and the inner ring part ( 3.2) A plurality of driving cogs (3.4) are evenly spaced along the inner circumference, and the metering slots (3.3) correspond to the driving cogs (3.4) one by one; The outer arc surface of the suspended end of the rotating metering wheel (3) is frictionally fitted; the intermittent driving mechanism (4) includes a driving wheel body (4.1), and a driving tooth (4.2) is arranged on the driving wheel body (4.1), The drive tooth (4.3) is intermittently rotatably matched with the drive tooth groove (3.4). The quantitative intermittent conveying device for powder and granular materials can accurately measure and quantify the discharge amount, and the discharge amount can be continuously adjusted within a certain range.

Description

Quantitative intermittent conveying device for powdery and granular materials and its metering and unloading method

technical field

The invention relates to the technical field of metering and conveying of powder and granular materials, in particular to a quantitative intermittent conveying device for powder and granular materials and a metering and unloading method thereof.

Background technique

In the process of industrial production, the metering device is an essential equipment for improving efficiency, stable production and high production. However, the measurement of powder materials is relatively difficult. When it is necessary to precisely control the addition of powdery and granular materials, a mechatronic continuous dynamic feeding metering device for quantitative feeding is required. In the field of non-viscous powder material metering and batching control, Japan completed the world's first impulse flowmeter in 1964, and then Germany, the United States, and the former Soviet Union also developed powder material flowmeters with their own characteristics. .

At present, there are weighing and flow metering methods for powder and granular material flowmeters, both of which have the disadvantages of high cost and low degree of automation, and the metering process is not suitable for widespread use in small and medium-sized factories.

There is also a pan-type feeder, which spreads the powder from the surrounding of the hopper placed on the rotating disk, and makes the powder fall from the surrounding of the rotating disk through the scraper, accepts the powder at the lower part and conveys it to the lower part.

There is also a star unloader, usually the star unloader structure is composed of a rotor impeller with several blades, a housing, a seal and a geared motor, and is used as a bin unloader in the collection material system. The material in the upper silo is filled in the gap between the blades by its own weight, and is discharged at the lower part with the rotation of the blades, and the material can be discharged continuously. However, the current star-shaped unloader cannot accurately measure and quantify the discharge volume, and cannot effectively control the discharge volume within a certain range.

Contents of the invention

In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a quantitative intermittent conveying device for powder and granular materials and a method for metering and unloading thereof.

The purpose of the present invention is achieved in this way, a quantitative intermittent conveying device for powdery and granular materials, including a hopper and a rotating metering wheel,

The hopper has a discharge port;

The rotary metering wheel includes a sleeve-shaped wheel main body, the wheel main body includes a suspended end, the inner wall of the suspended end is integrally formed with an inner ring, and the suspended end is provided with a plurality of metering grooves evenly spaced along the outer circumference. A plurality of drive slots are evenly spaced along the inner circumference, and the metering slots correspond to the drive slots one by one; the lower end of the discharge port rubs against the outer arc surface of the suspended end of the rotating metering wheel Cooperate;

It also includes an intermittent driving mechanism, the intermittent driving mechanism includes a driving wheel body, a driving tooth is arranged on the driving wheel body, and the driving tooth is intermittently rotatably matched with the driving tooth groove;

Every time the driving wheel body rotates one circle, the driving tooth is matched with the driving tooth groove at the corresponding position once, and the interval between the driving tooth groove and the rotation of the wheel body is moved, so that the discharge port is directly opposite to the next metering groove;

When the discharge port is directly opposite to the next metering tank, the four side walls of the metering tank just come into contact with the four side walls of the discharge port.

Further, a first positioning magnetic strip is provided on the rectangular side wall of the discharge port, and a second positioning magnetic strip is provided on the metering tank. When the discharge port is facing the next metering tank, the first positioning The magnetic strip is attracted to the second positioning magnetic strip for positioning.

Further, the discharge port is provided with a powder material outlet gap adjustment mechanism, and the powder material outlet gap adjustment mechanism includes a fixed seat, and a fixed sleeve is arranged on the fixed seat, and the adjusting cylinder is positioned on the fixed seat through the fixed sleeve, and the adjustment The end of the piston rod of the cylinder is integrally connected with an adjusting screw, and the movable valve is fixedly connected with an adjusting sleeve.

Further, the hopper includes a constant cross-section part and a tapered cross-section integrally connected to its lower end, and a powder inlet is provided on the top of the constant cross-section part; the front plate end of the tapered cross-section and the rear plate The lower part forms the outlet.

Further, there are plural driving cogs.

Further, the wheel main body also includes a mounting end, the mounting end is provided with a flange and a bearing press fitting groove, and the mounting end is rotatably installed in the trough through the bearing.

Further, the driving wheel body is arranged on the driving shaft, and the driving shaft is rotationally driven by the variable speed motor; the driving shaft is arranged on the diameter of the rotating metering wheel.

Further, a flow meter is provided in the discharge port, the flow meter and the variable speed motor are respectively connected to a control device, and the control device is connected to a discharge volume setting device.

A quantitative unloading method of the quantitative intermittent conveying device for powdery and granular materials, comprising the following steps:

1) Adjust the outlet flow

Utilize the powder outlet gap adjustment mechanism to adjust the outlet flow rate U of the discharge port to _unload ml/s, then need Seconds can fill up described metering tank; Wherein, V _counts as the volume of metering tank;

2) Calculate the speed of the variable speed motor according to the required discharge speed

Assuming that the quantitative intermittent conveying device for powdery and granular materials needs to set the unloading speed to be V _unloading ml/s, then filling the metering tank within 1 second requires a filling material volume of V _unloading ml, and the discharge time of the discharge port is required to be Second. The discharge time of the discharge port is the time for the intermittent drive mechanism to rotate for one week, therefore, the rotating speed of the drive wheel body 4.1 is revolution/second;

3) The control device adjusts the speed of the driving motor

The control device triggers the regulating circuit to adjust the speed of the driving motor to rev/s.

The quantitative intermittent conveying device for powder and granular materials achieves accurate measurement and quantification of the discharge volume through the following special structural design:

1) Metering groove, the wheel body and the discharge port are frictionally matched, and the metering grooves are evenly spaced on the wheel body, so that when the discharge port is facing the metering groove, the material is discharged, and when the discharge port misses the metering groove, the discharge is stopped and the metering How long the wheel rotates an interval frequency determines the amount of discharge that fills the metering tank;

2) For the pair structure of the driving cogging and the metering groove, one metering groove is arranged at a certain interval angle α on the outer circumference of the suspended end of the wheel body at regular intervals, and one metering groove is arranged on the inner circumference at a certain interval angle α on the same uniform interval. The driving cogging, every time the driving cogging rotates by an interval angle α, the metering groove also rotates by an interval angle α;

3) Intermittent drive mechanism, the intermittent drive mechanism ensures that the main body of the toggle wheel rotates at an interval angle α at a certain leveling frequency, that is, how long it takes, so that it can control the proportion of the volume of the discharge port filled with the metering tank. 1/3, 2/3, or 1, and the control can continuously adjust the filling amount by continuously controlling the rotational speed of the intermittent drive mechanism so that 0<V _unloading ≤ V _meter .

Through the mutual cooperation of the above three structures, the discharge volume can be precisely measured and quantified, and the discharge volume can be continuously adjusted within a certain range, and the structure is simple and practical.

Description of drawings

Fig. 1 is the front view of the quantitative intermittent conveying device for powder and granular materials of the present invention.

Fig. 2 is a right side view of the quantitative intermittent conveying device for powder and granular materials of the present invention.

Fig. 3 is a partial enlarged view of the corresponding position of the powder material outlet gap adjustment mechanism of the present invention.

Reference numerals in the above figures:

1. Hopper, 2. Discharge port, 3. Measuring wheel, 4. Intermittent driving mechanism, 5. Powder outlet gap adjustment mechanism, 6. Fixed sleeve, 7. Stroke adjustment nut, 8. Adjusting sleeve, 9. Movable valve, 10. Adjusting screw rod, 11. Fixed seat , 12 adjustment cylinders, 13 flow meters

1.1 Cross section constant part, 1.2 Cross section tapered part, 1.21 Front plate, 1.22 Back plate, 2.1 First positioning magnetic strip

3.1 Wheel main body, 3.2 Inner ring part, 3.3 Measuring groove, 3.4 Drive tooth groove, 3.5 Second positioning magnetic strip, 3.6 Flange,

3.7 Bearing press groove

4.1 Drive wheel body, 4.2 Drive gear, 4.3 Drive shaft, 4.4 Variable speed motor

detailed description

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but they are not used to limit the scope of the present invention.

Example 1

As shown in the figure, a quantitative intermittent conveying device for powder and granular materials includes a hopper 1 and a rotating metering wheel 3. The hopper 1 includes a cross-section constant part 1.1 and a cross-section tapered part 1.2 integrated with its lower end. The cross-section is different. The top of the variable part 1.1 is provided with a powder inlet; the end of the front plate 1.21 of the cross-sectional tapered part 1.2 and the lower part of the rear plate 1.22 form a discharge port 2 with a rectangular cross-section, and the lower end of the discharge port 2 Frictionally fit with the outer arc surface of the rotating metering wheel 3;

The rotary metering wheel 3 includes a sleeve-shaped wheel body 3.1, the wheel body 3.1 includes a mounting end and a suspended end, the mounting end is provided with a flange 3.6 and a bearing press groove 3.7, and the inner wall of the suspended end of the wheel body 3.1 is integrated An inner ring part 3.2 is formed, and the suspended end is provided with a plurality of metering grooves 3.3 evenly spaced along the outer circumference. The driving cogs 3.4 are in one-to-one correspondence; the driving cogs 3.4 are plural.

The discharge port 2 is provided with a powder material outlet gap adjustment mechanism 5, and the powder material outlet gap adjustment mechanism includes a fixed seat 11 arranged on the front plate 1.21, and a fixed sleeve 6 is arranged on the fixed seat, and the adjustment cylinder 12 passes through the The fixed sleeve 6 is positioned on the fixed seat, the end of the piston rod of the adjustment cylinder 12 is integrally connected with the adjustment screw 10, and the movable valve 9 is fixedly connected with the adjustment sleeve 8, and the adjustment screw 10 is screwed into the adjustment sleeve 8. Both sides of the cover 8 are provided with stroke adjustment nuts 7 and screwed with the adjustment screw rod 10 .

Also includes an intermittent drive mechanism 4, the intermittent drive mechanism 4 includes a drive wheel body 4.1, a drive tooth 4.2 is provided on the drive wheel body 4.1, the drive wheel body 4.1 is arranged on the drive shaft 4.3, and the drive shaft 4.3 is driven by a variable speed motor 4.4 Rotary drive. The drive shaft 4.3 is arranged on the diameter of the rotary metering wheel 3; the drive teeth 4.3 are rotationally fitted in the drive cogs 3.4.

When the driving wheel body 4.1 rotates one circle, the driving tooth 4.2 cooperates with the driving tooth slot in the horizontal position once, and the wheel main body 3.1 is driven to rotate for an interval, so that the discharge port 2 is directly opposite to the next metering groove 3.1; When the discharge port 2 is facing the next metering tank 3.1, the four side walls of the metering tank 3.4 are just in contact with the four side walls of the discharge port 2. When the metering wheel rotates, when the outlet 2 faces the outer peripheral surface of the metering wheel between the metering tanks 3.1, the outlet is blocked by the outer peripheral surface.

The rectangular side wall of the discharge port 2 is provided with a first positioning magnetic strip 2.1, and a second positioning magnetic strip 3.5 is provided on the metering tank 3.3. When the discharge port 2 is facing the next metering tank 3.1, the The first positioning magnetic strip 2.1 attracts the second positioning magnetic strip 3.5 for positioning. The powder and granular material fills the metering tank 3.4 from the discharge port 2 with a certain flow rate.

A flow meter 13 is provided at the position corresponding to the regulating valve 9 in the discharge port 2, the flow meter and the variable speed motor are respectively connected to a control device, and the control device is connected to a discharge volume setting device.

Assuming that the volume of metering tank 3.4 is V _meter ml, and the flow rate of powder granular material in _discharge port 2 is U meter ml/second, then it is required seconds to fill.

Adjust the output rotational speed M of speed-changing motor 4.4 and rev/sec, set the time required for driving wheel body 4.1 to rotate one week as Seconds, the metering tank of the discharge port is now being filled with powdery and granular materials That is, the driving wheel body 4.1 unloads every revolution

Conversely, assuming that the quantitative intermittent conveying device for powdery and granular materials needs to set the unloading speed to be V _unloading ml/s, then filling the metering tank within 1 second requires the volume of filling material to be V _unloading ml, and the discharge time of the discharge port is required to be Second. The discharge time of the discharge port is the time for the intermittent drive mechanism to rotate for one week, therefore, the rotating speed of the drive wheel body 4.1 is

The quantitative unloading method of the quantitative intermittent conveying device for powdery and granular materials comprises the following steps:

1) Adjust the outlet flow

Utilize the powder material outlet clearance adjustment mechanism 5 to be able to adjust the outlet flow rate U of discharge port 2 and _unload ml/ second, then need Seconds can fill up described metering tank 3.4; Wherein, V _counts as the volume of metering tank 3.4;

3) Calculate the speed of the variable speed motor according to the required discharge speed

Assuming that the quantitative intermittent conveying device for powdery and granular materials needs to set the unloading speed to be V _unloading ml/s, then filling the metering tank within 1 second requires a filling material volume of V _unloading ml, and the discharge time of the discharge port is required to be Second. The discharge time of the discharge port is the time for the intermittent drive mechanism to rotate for one week, therefore, the rotating speed of the drive wheel body 4.1 is rev/s.

4) The control device adjusts the speed of the drive motor to rev/s.

The quantitative intermittent conveying device for powder and granular materials and its quantitative unloading method precisely control the unloading speed of the metering wheel. The unloading speed is the filling amount of the metering tank per second, which can accurately measure the unloading amount. And quantitative, to meet the effective control of a certain range of discharge volume. This certain range is to be able to effectively control the discharge volume within the volume range of the metering tank.

Claims (8)

1. the quantitative intermittent conveyer of granular material, takes turns (3) including hopper (1) and rotary metering, it is characterised in that material Bucket (1) has discharging opening (2)；

Described rotary metering wheel (3) includes sleeve shaped wheel body (3.1), and described wheel body includes free end, free end inwall one Body formed have internal ring portion (3.2), and described free end is provided with multiple measuring tank (3.3), described internal ring portion along excircle uniform intervals (3.2) it is provided with multiple driving teeth groove (3.4), described measuring tank (3.3) and described driving teeth groove (3.4) along inner periphery uniform intervals One_to_one corresponding；The free end exterior arc surface frictional fit of (3) is taken turns with described rotary metering in the bottom of described discharging opening (2)；

Also include that intermittent drive mechanism (4), described intermittent drive mechanism (4) include driving wheel body (4.1), driving wheel body (4.1) a driving tooth (4.2) it is provided with, described driving tooth (4.3) rotatable engagement intermittent with driving teeth groove (3.4)；

Drive wheel body (4.1) often to revolve to turn around, drive the driving tooth socket fit of tooth (4.2) and relevant position once, stir described Wheel body (3.1) rotates an interval driving teeth groove so that described discharging opening (2) is the most right with next measuring tank (3.1)；

When discharging opening (2) and next measuring tank (3.1) just pair time, the four sides sidewall of described measuring tank (3.4) just with discharging The four sides sidewall contact of mouth (2).

2. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that the length of described discharging opening (2) Square sidewall is provided with the first location magnetic stripe (2.1), is provided with the second location magnetic stripe (3.5), discharging opening on measuring tank (3.3) (2), time with next measuring tank (3.1) just pair, described first location magnetic stripe (2.1) holds the second location magnetic stripe (3.5) location.

3. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that described discharging opening (2) is provided with Powder outlet clearance adjustment mechanism (5), described powder outlet clearance adjustment mechanism includes fixing seat (11), is provided with on fixing seat Fixed cover (6), regulation cylinder (12) is positioned on fixing seat by fixed cover, and the piston rod end one of regulation cylinder connects to be adjusted Joint screw mandrel (10), movable valve (9) is fixed with regulation set (8), and described regulation screw mandrel (10) threaded engagement, in regulation set, is being adjusted Joint set both sides are provided with stroke adjustment nut (7) and regulation screw mandrel threaded engagement.

4. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that hopper (1) includes cross section Constant portion (1.1) and portion tapered with the cross section that its lower end links into an integrated entity (1.2), the top in the constant portion of cross section (1.1) sets There is powdering inlet；Header board (1.21) end in the tapered portion of described cross section (1.2) forms discharging opening with the bottom of back plate (1.22) (2)。

5. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that described driving teeth groove (3.4) For a plurality of.

6. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that described wheel body (3.1) is also Including installation end, described installation end is provided with flange (3.6) and bearing press mounting groove (3.7), and described installation end is pacified by bearing rotary It is contained in hopper.

7. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that drive wheel body (4.1) to arrange In drive shaft (4.3), described drive shaft (4.3) is rotated by variable speed electric motors, particularly (4.4) and drives；Described drive shaft (4.3) is arranged on Described rotary metering wheel (3) is diametrically.

8. the quantitative intermittent conveyer of granular material as claimed in claim 1, it is characterised in that described discharging opening sets in (2) Having effusion meter (13), effusion meter and variable speed electric motors, particularly connect control device respectively, control device and connect discharging quantity setting device.