CN107966195B - Weighing method and weighing device for powder material - Google Patents
Weighing method and weighing device for powder material Download PDFInfo
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- CN107966195B CN107966195B CN201711085908.7A CN201711085908A CN107966195B CN 107966195 B CN107966195 B CN 107966195B CN 201711085908 A CN201711085908 A CN 201711085908A CN 107966195 B CN107966195 B CN 107966195B
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- 239000000843 powder Substances 0.000 title claims abstract description 176
- 238000005303 weighing Methods 0.000 title claims abstract description 144
- 239000000463 material Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 29
- 230000001360 synchronised effect Effects 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
- G01G19/34—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them with electrical control means
- G01G19/346—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them with electrical control means involving comparison with a reference value
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
- G01G19/24—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them using a single weighing apparatus
- G01G19/30—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them using a single weighing apparatus having electrical weight-sensitive devices
- G01G19/306—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them using a single weighing apparatus having electrical weight-sensitive devices involving comparison with a reference value
Abstract
The invention discloses a weighing method and a weighing device for powder materials. The weighing device comprises a powder storage unit, a powder metering and weighing unit and a control and data processing unit; the powder metering and weighing unit comprises a metering and weighing container arranged on a frame and a weighing instrument for weighing powder in the metering and weighing container, wherein the weighing instrument is electrically connected with the control and data processing unit, the weighing device further comprises an automatic taking-out unit for automatically taking out excessive powder in the metering and weighing container from the metering and weighing container, and the automatic taking-out unit is electrically connected with the control and data processing unit. The invention can accurately and automatically take out excessive powder, improves the working efficiency and ensures continuous and stable production operation.
Description
Technical Field
The invention relates to a weighing method and a weighing device for solid-phase powder materials, and belongs to the technical field of metering detection.
Background
In the field of modern industrial production, certain fields, such as textile printing and dyeing, are associated with metering, in particular of powdery materials, in a very inseparable manner with regard to their specific raw materials, products and production.
The powder material has a flow property, and fluidity is affected by moisture. In general, when the moisture content of the powder is increased, the fluidity is poor, the powder tends to be cohesive and has larger adhesiveness, and the larger the moisture content is, the stronger the adhesiveness is, the poorer the fluidity is, so that the whole fluidity of the powder material is also uneven. Moreover, as the storage time of the powder material is longer, the powder material is easier to agglomerate, and the flow property is poorer and more uneven.
Powder materials are conveyed from the storage container to the metering and weighing container, and the powder materials in the high-level storage container and the low-level metering and weighing container are controllably conveyed under the action of gravity through pipelines and are connected with a controllable opening regulating valve in series, or the powder materials are conveyed from the storage container to the metering and weighing container in other modes such as a speed regulating spiral reamer and the like, and then the opening of the regulating valve or the rotation speed of the spiral reamer is controlled by a modern electronic weighing and measuring system, so that quantitative metering and weighing are realized.
However, due to the non-uniformity of the powder material flow, even the agglomeration of the powder material, the opening of the regulating valve, the rotating speed of the spiral reamer and the discharging amount are nonlinear, so that accurate and controllable quantitative weighing and discharging are not easy to realize, and the excessive powder material in the metering and weighing container is often caused. The prior art has to rely on manual removal of excess powder material. Some powder materials can be dispersed into the air, are toxic, inflammable, highly corrosive and high in dust, are extremely unsuitable for contact of workers, are easy to cause serious diseases due to chronic poisoning of the workers after long-term inhalation and contact, and seriously harm the health of the workers; for inflammable powder, the staff also has to wear antistatic working clothes, release human static before the operation, and the whole operation of retrieving excessive powder has to accord with operation rules, is tedious and complicated, has neglect slightly, has the potential safety hazard. In addition, operators have different manual removal of excessive powder, the amount of the recovered powder is different, the uncertainty of subjective operation of the operators is caused, the process of recovery and weighing is often required to be repeated for a plurality of times, the metering and weighing efficiency is low, and the continuity of industrial production is seriously affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for weighing powder materials efficiently, rapidly and accurately.
The invention further aims to provide a device capable of achieving efficient, rapid and accurate weighing of powder materials.
In order to solve the technical problems, the invention adopts a weighing method of powder materials, wherein the powder is stored in a material bin, and the method comprises the following steps: conveying the powder from the material bin into a metering and weighing container for weighing; the weighing step is provided with a step of automatically taking out excessive powder in the weighing container from the weighing container.
As a preferred embodiment of the above method, the step of automatically taking out is followed by a step of discharging the powder in the weighed weighing container and transferring the powder to a proportioning tank.
As the preferred implementation scheme of the method, the powder is in a plurality of types, the powder is respectively stored in independent material bins, and the powder is respectively conveyed into a metering and weighing container from the independent material bins for weighing; and the excessive powder in the metering and weighing container is automatically taken out from the metering and weighing container in a vacuum suction taking-out mode, a mechanical arm taking-out mode or a cannula inserting and taking-out mode.
In order to meet the requirement of automatically taking out excessive powder in the metering and weighing container, the invention adopts the weighing device which comprises a powder storage unit, a powder metering and weighing unit and a control and data processing unit; the powder metering and weighing unit comprises a metering and weighing container arranged on a frame and a weighing instrument for weighing powder in the metering and weighing container, wherein the weighing instrument is electrically connected with the control and data processing unit, the weighing device further comprises an automatic taking-out unit for automatically taking out excessive powder in the metering and weighing container from the metering and weighing container, and the automatic taking-out unit is electrically connected with the control and data processing unit.
As a preferred embodiment of the present invention, the automatic take-out unit includes a powder level sensor, a retrieving device, and a recycling bin; the powder level sensor is fixedly connected with the metering weighing container or the rack, and the retrieving device comprises a cylindrical outer tube, a cylindrical inner tube nested in the inner cavity of the outer tube, a lifting mechanism and a transverse moving mechanism; the outer tube and the inner tube are the same in barrel bottom shape and are respectively provided with a plurality of grids and arc holes which are arranged at intervals, a plurality of waist round holes which are vertical and arranged at intervals are arranged on the tube wall of the outer tube and above the arc holes of the outer tube, rectangular long waist round holes which are vertical and arranged are arranged on the tube wall of the inner tube and above the grids of the inner tube are arranged on the tube wall of the inner tube, the inner tube is connected with an output shaft of a first motor and driven to rotate by the first motor, when the first motor drives the inner tube to rotate for a certain angle, the arc holes of the outer tube barrel bottom are completely covered and sealed by the grids of the inner tube barrel bottom, and meanwhile, the waist round holes on the tube wall of the outer tube are coincided with the rectangular long waist round holes on the tube wall of the inner tube; the lifting mechanism comprises a second motor, a gear driven by the second motor to rotate, a rack which is meshed with the gear and is vertically arranged, and a bracket fixedly arranged at the bottom of the rack, wherein the outer tube and the first motor are respectively and fixedly connected with the bracket; the transverse moving mechanism comprises a third motor, a synchronous wheel driven by the third motor to rotate, a synchronous belt meshed with the synchronous wheel, a horizontally arranged sliding block and a sliding rail, wherein the third motor and the sliding rail are respectively and fixedly installed on the frame, the sliding block is fixedly installed on the synchronous belt and is in sliding fit with the sliding rail, the second motor is fixedly installed on the sliding block, a rack stabilizing wheel is fixedly installed on the sliding block, the rack stabilizing wheel is meshed with the rack to be matched with the rack and is arranged opposite to the gear, and the powder level sensor, the first motor, the second motor and the third motor are respectively and electrically connected with the control and data processing unit.
As another preferred embodiment of the present invention, the automatic take-out unit includes a powder level sensor, a retrieving device, and a recycling bin; the powder level sensor is fixedly connected with the metering weighing container or the rack, and the retrieving device comprises a spiral reamer, a bobbin sleeved on the outer wall surface of the spiral reamer, a lifting mechanism and a transverse moving mechanism; the spiral reamer is connected with an output shaft of the first motor and driven to rotate by the first motor, the lifting mechanism comprises a second motor, a gear driven to rotate by the second motor, a rack meshed with the gear and vertically arranged, and a bracket fixedly arranged at the bottom of the rack, and the bobbin and the first motor are respectively fixedly connected with the bracket; the transverse moving mechanism comprises a third motor, a synchronous wheel driven by the third motor to rotate, a synchronous belt meshed with the synchronous wheel, a horizontally arranged sliding block and a sliding rail, wherein the third motor and the sliding rail are respectively and fixedly installed on the frame, the sliding block is fixedly installed on the synchronous belt and is in sliding fit with the sliding rail, the second motor is fixedly installed on the sliding block, a rack stabilizing wheel is fixedly installed on the sliding block, the rack stabilizing wheel is meshed with the rack to be matched with the rack and is arranged opposite to the gear, and the powder level sensor, the first motor, the second motor and the third motor are respectively and electrically connected with the control and data processing unit.
As still another preferred embodiment of the present invention, the automatic take-out unit includes a camera, a cantilever type three-axis robot, and a recycling bin, which are electrically connected to the control and data processing unit, respectively.
The powder storage unit comprises a plurality of independent material bins and material bin discharging pipes respectively arranged at the bottom of each independent material bin, a first stop valve is arranged on each material bin discharging pipe, a plurality of types of powder are respectively stored in each independent material bin, the independent material bins are horizontally arranged in parallel and fixedly arranged on a material storage frame, the material storage frame is horizontally transversely moved by a horizontal moving mechanism, the powder metering and weighing unit further comprises a powder receiving pipe communicated with a metering and weighing container and a powder flow regulating valve arranged on the powder receiving pipe, the powder receiving pipe is arranged below the material bin discharging pipes, and the first stop valve, the horizontal moving mechanism and the powder flow regulating valve are respectively and electrically connected with the control and data processing unit.
As a preferred embodiment of the invention, the weighing device further comprises a powder weighing-completed discharging unit, wherein the powder weighing-completed discharging unit comprises a fan, a hose and a proportioning tank, and two ends of the hose are respectively communicated with an air outlet of the fan and a metering weighing container; a powder discharging pipe is arranged at the bottom of the metering and weighing container, the powder discharging pipe is communicated with the proportioning tank, and a second stop valve is arranged on the powder discharging pipe; and the fan and the second stop valve are respectively and electrically connected with the control and data processing unit.
In the invention, the horizontal moving mechanism preferably comprises a fourth motor, a material bin gear driven by the fourth motor to rotate, and a material bin rack meshed with the material bin gear and horizontally arranged, wherein the material bin rack is fixedly arranged at the bottom of the material storage rack, a plurality of rollers are also arranged at the bottom of the material storage rack, the fourth motor is fixedly arranged on the frame, a position sensor is arranged at one side of each material bin blanking pipe, and the fourth motor and each position sensor are respectively and electrically connected with the control and data processing unit, and the control and data processing unit is preferably a digital controller or an industrial personal computer with a human-computer interface.
After the weighing method and the weighing device for the powder materials are adopted, the invention has the following beneficial effects:
according to the invention, the step of automatically taking out excessive powder is arranged in the weighing step of the weighing method, and the automatic taking-out unit for automatically taking out excessive powder from the metering and weighing container is arranged in the weighing device, so that the powder retrieving staff is thoroughly prevented from working in a toxic and harmful environment, the health of the staff is ensured to be free from infringement, the intrinsic safety operation in the inflammable powder treatment process is further ensured, and the accident potential is avoided; meanwhile, the problems that the existing powder batching system is low in accuracy by manually removing excessive powder, the retrieving powder amount is greatly influenced by subjective operation of operators, the metering and weighing efficiency is low, the production continuity is poor and the like are solved, the accuracy of the retrieving powder amount is high, the production efficiency is improved, the production operation is continuous and stable, and the effective effects of meeting the actual production needs and the like can be better achieved.
According to the invention, the proportion of raw materials can be accurately controlled and the product quality is high by arranging a plurality of independent material bins and accurately taking out excessive powder from the automatic taking-out unit.
The weighing device has the advantages of simple structure, low production cost, high speed and high working efficiency, and better meets the requirements of accurate weighing and proportioning of powder materials.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 is a schematic view of a weighing apparatus according to the present invention.
Fig. 2 is a schematic structural view of a first preferred embodiment of an automatic take-out unit in the weighing apparatus of the present invention.
Fig. 3 is a schematic top view of the bottom of the exterior tube of fig. 2.
Fig. 4 is a schematic top view of the interior tube bottom of fig. 2.
Fig. 5 is a schematic structural view of a second preferred embodiment of an automatic take-out unit in the weighing apparatus of the present invention.
Detailed Description
In order to improve the working efficiency and better meet the requirements of accurate weighing and proportioning of powder materials, the invention adopts the weighing method and the weighing device of the powder materials as shown in figures 1 to 5.
The powder material weighing method includes that powder is stored in a material bin, and the method includes the steps: conveying the powder from the material bin into a metering and weighing container for weighing; the weighing step is also provided with a step of automatically taking out excessive powder in the weighing container from the weighing container.
As a preferred embodiment of the above method, the step of automatically taking out is followed by a step of discharging the powder in the weighed weighing container and transferring the powder to a proportioning tank. In the invention, the weighed powder is preferably discharged in a pneumatic conveying mode through wind pressure and conveyed to a proportioning tank.
As the preferred implementation scheme of the method, a plurality of powder are respectively stored in independent material bins, the powder is respectively conveyed from the independent material bins to a metering and weighing container for weighing, and the weighed powder is finally respectively discharged from the metering and weighing container and conveyed to a proportioning tank for proportioning; the excess powder in the weighing container is preferably automatically taken out from the weighing container by a vacuum suction taking-out method, a mechanical hand taking-out method, a cannula inserting and taking-out method, or the like.
In order to automatically take out excessive powder in the metering and weighing container, the invention adopts a weighing device which comprises a powder storage unit A, a powder metering and weighing unit B and a control and data processing unit E as shown in figure 1; the powder metering and weighing unit B comprises a metering and weighing container 21 fixedly arranged on the frame 1 and a weighing instrument 22 for weighing powder in the metering and weighing container 21, wherein the powder is not shown in the figure, the weighing instrument 22 can be a weighing module, an electronic scale or the like, the weighing instrument 22 is electrically connected with the control and data processing unit E, the weighing device further comprises an automatic taking-out unit C for automatically taking out excessive powder in the metering and weighing container 21 from the metering and weighing container 21, and the automatic taking-out unit C is electrically connected with the control and data processing unit E.
As a preferred embodiment of the present invention, as shown in fig. 1 to 4, the automatic withdrawing unit C includes a powder level sensor 30, a withdrawing means and a recovery tub 31; the powder level sensor 30 is preferably an ultrasonic level sensor, the powder level sensor 30 is fixedly connected with the metering and weighing container 21 or directly fixedly connected with the frame 1 through a bracket, and the retrieval device comprises a cylindrical outer tube 32, a cylindrical inner tube 33 nested in the inner cavity of the outer tube 32, a lifting mechanism and a transverse moving mechanism; the materials of the outer tube 32 and the inner tube 33 are stainless steel, the bottoms of the outer tube 32 and the inner tube 33 are the same in shape and are respectively provided with a plurality of grids 3a and arc holes 3b which are arranged at intervals, the grids 3a and the arc holes 3b shown in fig. 3 and 4 are arranged at intervals of 90 degrees, of course, the grids 3a and the arc holes 3b shown in fig. 3 and 4 are also arranged at intervals of 30 degrees, 45 degrees and 60 degrees, a plurality of vertically and intermittently arranged waist round holes 3c are formed in the tube wall of the outer tube 32 and above the arc holes 3b of the outer tube, a vertically arranged rectangular long waist round hole 3d is formed in the tube wall of the inner tube 33 and above the inner tube grid 3a, the inner tube 33 is connected with an output shaft of a first motor 34 and is driven to rotate by the first motor 34, and when the first motor 34 drives the inner tube 33 to rotate for a certain angle, for example, the arc holes 3b at the bottom of the outer tube 32 are completely covered and sealed by the grids 3a of the bottom of the inner tube 33 in an equal angle shown in fig. 3 and 4, and the waist round holes 3c on the tube wall of the inner tube 32 are coincident with the rectangular long waist round holes 3 d; the lifting mechanism comprises a second motor 35, a gear 36 driven by the second motor 35 to rotate through a speed reducer, a rack 37 meshed with the gear 36 and vertically arranged, and a cylindrical bracket 38 fixedly arranged at the bottom of the rack 37, wherein the outer tube 32 and the first motor 34 are respectively fixedly connected with the bracket 38; the traversing mechanism comprises a third motor 39a, a synchronous wheel 39b driven by the third motor 39a to rotate through a speed reducer, a synchronous belt 39c meshed and matched with the synchronous wheel 39b, a horizontally arranged sliding block 39d and a sliding rail 39E, wherein the third motor 39a and the sliding rail 39E are respectively and fixedly arranged on the frame 1, the sliding block 39d is fixedly arranged on the synchronous belt 39c and is in sliding fit with the sliding rail 39E, the second motor 35 is fixedly arranged on the sliding block 39d, a rack stabilizing wheel 36a is fixedly arranged on the sliding block 39d, the rack stabilizing wheel 36a is meshed and matched with the rack 37 and is arranged opposite to the gear 36, and the powder level sensor 30, the first motor 34, the second motor 35 and the third motor 39a are respectively and electrically connected with the control and data processing unit E.
As another preferred embodiment of the present invention, as shown in fig. 5, the automatic withdrawing unit C includes a powder level sensor 30, a withdrawing means and a recovery tub 31; the powder level sensor 30 is preferably an ultrasonic level sensor, the powder level sensor 30 is fixedly connected with the metering and weighing container 21 or directly fixedly connected with the frame 1 through a bracket, and the retrieval device comprises a spiral reamer 32a, a bobbin 33a sleeved on the outer wall surface of the spiral reamer 32a, a lifting mechanism and a transverse moving mechanism; the spiral reamer 32a is connected with an output shaft of the first motor 34 and is driven to rotate by the first motor 34, the lifting mechanism comprises a second motor 35, a gear 36 driven to rotate by the second motor 35 through a speed reducer, a rack 37 meshed with the gear 36 and vertically arranged, and a cylindrical bracket 38 fixedly arranged at the bottom of the rack 37, and the bobbin 33a and the first motor 34 are fixedly connected with the bracket 38 respectively; the traversing mechanism comprises a third motor 39a, a synchronous wheel 39b driven by the third motor 39a to rotate through a speed reducer, a synchronous belt 39c meshed and matched with the synchronous wheel 39b, a horizontally arranged sliding block 39d and a sliding rail 39E, wherein the third motor 39a and the sliding rail 39E are respectively and fixedly arranged on the frame 1, the sliding block 39d is fixedly arranged on the synchronous belt 39c and is in sliding fit with the sliding rail 39E, the second motor 35 is fixedly arranged on the sliding block 39d, a rack stabilizing wheel 36a is fixedly arranged on the sliding block 39d, the rack stabilizing wheel 36a is meshed and matched with the rack 37 and is arranged opposite to the gear 36, and the powder level sensor 30, the first motor 34, the second motor 35 and the third motor 39a are respectively and electrically connected with the control and data processing unit E. In the present invention, the retrieving device may also adopt a bobbin 33a, and a vacuum pump is installed at the upper end of the bobbin 33a, and the other structures are the same, and the excessive powder is taken out by vacuum suction, which is not shown in the figure.
As a further preferred embodiment of the present invention, the automatic extraction unit C comprises a camera, a conventional cantilever type three-axis robot, and a recycling bin 31 mounted above or in the cavity of the weighing cell 21, not shown, which are electrically connected to the control and data processing unit E, respectively. During operation, the camera directly judges the powder stacking height, and under the control of the control and data processing unit E, the cantilever type triaxial manipulator retrieves excessive powder and puts the excessive powder into the recycling bin 31.
In the invention, as shown in fig. 1, the powder storage unit a comprises a plurality of independent material bins 11 and vertical material bin discharging pipes 12 respectively installed at the bottom of each independent material bin 11, three material bins 11 are shown in the figure, and of course, more material bins 11 are shown, each material bin discharging pipe 12 is provided with a first stop valve 13, a plurality of powder is respectively stored in each independent material bin 11, the plurality of independent material bins 11 are horizontally arranged in parallel and fixedly installed on a material storage frame 14, the material storage frame 14 is driven by a horizontal moving mechanism to move horizontally and horizontally transversely, the powder metering and weighing unit B also comprises a powder receiving pipe 23 communicated with a metering and weighing container 21 and a powder flow regulating valve 24 installed on the powder receiving pipe 23, the powder receiving pipe 23 is positioned below the material bin discharging pipe 12, and the first stop valve 13, the horizontal moving mechanism and the powder flow regulating valve 24 are respectively electrically connected with the control and data processing unit E.
As a preferred embodiment of the present invention, as shown in fig. 1, the weighing device further includes a powder-weighing-completed discharge unit D, where the powder-weighing-completed discharge unit D includes a blower 41, a hose 42, and a proportioning tank 43, the blower 41 is preferably a Roots blower, and two ends of the hose 42 are respectively communicated with an air outlet of the blower 41 and the metering and weighing container 21; a powder discharging pipe 25 is arranged at the bottom of the metering and weighing container 21, the powder discharging pipe 25 is communicated with a proportioning tank 43, and a second stop valve 26 is arranged on the powder discharging pipe 25; the fan 41 and the second stop valve 26 are respectively electrically connected with the control and data processing unit E.
In the invention, as shown in fig. 1, the horizontal moving mechanism comprises a fourth motor 15, a material bin gear 16 driven by the fourth motor 15 to rotate through a speed reducer, and a material bin rack 17 meshed with the material bin gear 16 and horizontally arranged, wherein the material bin rack 17 is fixedly arranged at the bottom of the material storage rack 14, a plurality of rollers 14a are also arranged at the bottom of the material storage rack 14, the rollers 14a can roll on the frame 1, the fourth motor 15 is fixedly arranged on the frame 1, a position sensor 18 is arranged at one side of each material bin blanking pipe 12, and the fourth motor 15 and each position sensor 18 are respectively and electrically connected with the control and data processing unit E, and the control and data processing unit E is preferably a digital controller or an industrial personal computer with a human-computer interface.
A preferred working procedure for the invention is as follows: the digital controller E controls the fourth motor 15 to drive the material storage rack 14 to transversely move through the material storage bin gear 16 and the material storage bin rack 17, and the digital controller E receives a in-place signal sent by the position sensor 18 of the material storage bin 11, so that the material storage bin discharging pipe 12 is completely in butt joint with the powder receiving pipe 23.
The digital controller E opens the first stop valve 13, and opens the powder flow rate regulating valve 24 according to the quantitative value required by the powder material set by the human-computer interface, and at this time, the powder in the material bin 11 is deposited in the metering and weighing container 21 through the material bin discharging pipe 12, the first stop valve 13, the powder receiving pipe 23 and the powder flow rate regulating valve 24 under the action of gravity. In the process of the whole powder falling and accumulating in the metering and weighing container 21, the digital controller E continuously receives the powder weight value transmitted by the weighing instrument 22 and adjusts the opening of the powder flow regulating valve 24 in real time according to the quantitative value required by the powder set by a human-computer interface according to the process requirement, so that the weight of the powder material in the final metering and weighing container 21 approaches to the process quantitative value. After the process quantitative value is satisfied, the digital controller E closes the first shut-off valve 13 and the powder flow regulating valve 24.
However, due to non-uniformity in the flow of the powder material, and even agglomeration of the powder material, the powder weight in the metered weigh tank 21 is typically caused to be greater than the process quantitative value. When the powder in the weighing container 21 is excessively measured, the digital controller E immediately starts an excessive powder retrieving program, simultaneously closes the first stop valve 13 and the powder flow regulating valve 24, receives data of the ultrasonic powder level height sensor 30, calculates the depth of the powder inserted into the inner and outer tubes 33 and 32 in the retrieving device, namely determines the weight of the powder to be retrieved, controls the first motor 34 to drive the inner tube 33 to rotate clockwise for 90 degrees, so that the arc-shaped hole 3b at the bottom of the outer tube 32 is completely covered and sealed by the grid 3a at the bottom of the inner tube 33, simultaneously the waist round hole 3c on the wall of the outer tube 32 is overlapped and communicated with the rectangular long waist round hole 3d on the wall of the inner tube 33, the second motor 35 inserts the inner and outer tubes 33 and 32 into the powder according to the calculated inserted powder depth, after the powder enters the inner cavity of the inner tube 33 through waist round holes on the walls of the inner tube 33 and the outer tube 32, the digital controller E controls the second motor 35 to lift the inner tube 33 and the outer tube 32 to leave the metering and weighing container 21, the second motor 35 is closed, the third motor 39a is started, the inner tube 33 and the outer tube 32 are moved to the upper part of the recycling bin 31, the third motor 39a is closed, the first motor 34 is started to be controlled to rotate anticlockwise by 90 degrees, the arc-shaped hole 3b of the bottom of the outer tube 32 is overlapped and communicated with the arc-shaped hole 3b of the bottom of the inner tube 33, excessive powder is placed in the recycling bin 31, and then the digital controller E sequentially controls the first motor 34, the second motor 35 and the third motor 39a respectively, so that the retrieval device is restored to the original place, and the quantitative weighing meeting the technological requirements is completed. In addition, the second preferred embodiment is different from the first preferred embodiment in that the retrieving device of the second preferred embodiment is a spiral reamer device, the spiral reamer 32a is controlled to rotate forward/reverse by the first motor 34 to complete powder retrieving/powder discharging, the second motor 35 and the third motor 39a complete lifting/translation of the retrieving device, and the powder is placed in the recycling bin 31.
After the weighing is finished, the second stop valve 26 is opened, the Roots blower 41 is started, and the air pressure generated by the Roots blower 41 conveys the powder material in the weighing container 21 to the proportioning tank 43.
The method and the weighing device provided by the invention can accurately take out excessive powder after trial, improve the working efficiency, ensure continuous and stable production operation and obtain good effects.
Claims (4)
1. The powder is stored in a material bin, the powder is conveyed from the material bin into a metering and weighing container for weighing, and excessive powder in the metering and weighing container is automatically taken out from the metering and weighing container in the weighing process; comprises a powder storage unit (A), a powder metering and weighing unit (B) and a control and data processing unit (E); the powder metering and weighing unit (B) comprises a metering and weighing container (21) arranged on the frame (1) and a weighing instrument (22) for weighing powder in the metering and weighing container (21), wherein the weighing instrument (22) is electrically connected with the control and data processing unit (E), and is characterized in that: the weighing device also comprises an automatic taking-out unit (C) for automatically taking out excessive powder in the weighing container (21) from the weighing container (21), wherein the automatic taking-out unit (C) is electrically connected with the control and data processing unit (E);
the automatic taking-out unit (C) comprises a powder level sensor (30), a retrieving device and a retrieving barrel (31); the powder level sensor (30) is fixedly connected with the metering weighing container (21) or the rack (1), and the retrieving device comprises a cylindrical outer tube (32), a cylindrical inner tube (33) nested in the inner cavity of the outer tube (32), a lifting mechanism and a transverse moving mechanism; the outer tube (32) and the inner tube (33) are identical in barrel bottom shape and are respectively provided with a plurality of grids (3 a) and arc holes (3 b) which are arranged at intervals, a plurality of waist round holes (3 c) which are arranged vertically and at intervals are formed in the tube wall of the outer tube (32) and above the arc holes (3 b) of the outer tube, rectangular long waist round holes (3 d) which are arranged vertically are formed in the tube wall of the inner tube (33) and above the inner tube grids (3 a), the inner tube (33) is connected with an output shaft of a first motor (34) and is driven to rotate by the first motor (34), and when the first motor (34) drives the inner tube (33) to rotate for a certain angle, the arc holes (3 b) in the barrel bottom of the outer tube (32) are completely covered and sealed by the grids (3 a) in the barrel bottom of the inner tube (33), and meanwhile the waist round holes (3 c) in the tube wall of the outer tube (32) are overlapped and run through the rectangular long waist round holes (3 d) in the tube wall of the inner tube (33); the lifting mechanism comprises a second motor (35), a gear (36) driven by the second motor (35) to rotate, a rack (37) meshed with the gear (36) and vertically arranged, and a bracket (38) fixedly arranged at the bottom of the rack (37), wherein the outer tube (32) and the first motor (34) are fixedly connected with the bracket (38) respectively; the transverse moving mechanism comprises a third motor (39 a), a synchronous wheel (39 b) driven by the third motor (39 a) to rotate, a synchronous belt (39 c) meshed with the synchronous wheel (39 b), a horizontally arranged sliding block (39 d) and a sliding rail (39E), wherein the third motor (39 a) and the sliding rail (39E) are respectively and fixedly arranged on the frame (1), the sliding block (39 d) is fixedly arranged on the synchronous belt (39 c) and the sliding block (39 d) is in sliding fit with the sliding rail (39E), the second motor (35) is fixedly arranged on the sliding block (39 d), a rack stabilizing wheel (36 a) is fixedly arranged on the sliding block (39 d), the rack stabilizing wheel (36 a) is meshed with the rack (37) and is arranged opposite to the gear (36), and the powder level sensor (30), the first motor (34), the second motor (35) and the third motor (39 a) are respectively and electrically connected with the control and data processing unit (E);
or the automatic taking-out unit (C) comprises a powder level sensor (30), a retrieving device and a retrieving barrel (31); the powder level sensor (30) is fixedly connected with the metering weighing container (21) or the frame (1), and the retrieving device comprises a spiral reamer (32 a), a bobbin (33 a) sleeved on the outer wall surface of the spiral reamer (32 a), a lifting mechanism and a transverse moving mechanism; the spiral reamer (32 a) is connected with an output shaft of the first motor (34) and is driven to rotate by the first motor (34), the lifting mechanism comprises a second motor (35), a gear (36) driven to rotate by the second motor (35), a rack (37) which is meshed with the gear (36) and is vertically arranged, and a bracket (38) fixedly arranged at the bottom of the rack (37), and the bobbin (33 a) and the first motor (34) are respectively fixedly connected with the bracket (38); the transverse moving mechanism comprises a third motor (39 a), a synchronous wheel (39 b) driven by the third motor (39 a) to rotate, a synchronous belt (39 c) meshed with the synchronous wheel (39 b), a horizontally arranged sliding block (39 d) and a sliding rail (39E), wherein the third motor (39 a) and the sliding rail (39E) are respectively and fixedly arranged on the frame (1), the sliding block (39 d) is fixedly arranged on the synchronous belt (39 c) and the sliding block (39 d) is in sliding fit with the sliding rail (39E), the second motor (35) is fixedly arranged on the sliding block (39 d), a rack stabilizing wheel (36 a) is fixedly arranged on the sliding block (39 d), the rack stabilizing wheel (36 a) is meshed with the rack (37) and is arranged opposite to the gear (36), and the powder level sensor (30), the first motor (34), the second motor (35) and the third motor (39 a) are respectively and electrically connected with the control and data processing unit (E);
or the automatic taking-out unit (C) comprises a camera, a cantilever type triaxial manipulator and a recycling bin (31), and the camera and the cantilever type triaxial manipulator are respectively and electrically connected with the control and data processing unit (E).
2. The weighing apparatus of claim 1 wherein: the powder storage unit (A) comprises a plurality of independent material bins (11) and material bin discharging pipes (12) which are respectively arranged at the bottoms of the independent material bins (11), each material bin discharging pipe (12) is provided with a first stop valve (13), the powder is respectively stored in the independent material bins (11), the independent material bins (11) are horizontally arranged in parallel and fixedly arranged on the material storage frame (14), the material storage frame (14) is horizontally transversely moved by a horizontal moving mechanism, the powder metering and weighing unit (B) further comprises a powder receiving pipe (23) which is communicated with a metering and weighing container (21) and a powder flow regulating valve (24) which is arranged on the powder receiving pipe (23), the powder receiving pipe (23) is positioned below the material bin discharging pipe (12), and the first stop valve (13), the horizontal moving mechanism and the powder flow regulating valve (24) are respectively electrically connected with the processing unit (E) in a control mode.
3. A weighing apparatus according to claim 2, wherein: the weighing device further comprises a powder weighing-finished discharging unit (D), wherein the powder weighing-finished discharging unit (D) comprises a fan (41), a hose (42) and a proportioning tank (43), and two ends of the hose (42) are respectively communicated with an air outlet of the fan (41) and a metering weighing container (21); a powder discharging pipe (25) is arranged at the bottom of the metering and weighing container (21), the powder discharging pipe (25) is communicated with a proportioning tank (43), and a second stop valve (26) is arranged on the powder discharging pipe (25); the fan (41) and the second stop valve (26) are respectively and electrically connected with the control and data processing unit (E).
4. A weighing apparatus according to claim 3, wherein: the horizontal moving mechanism comprises a fourth motor (15), a material bin gear (16) driven by the fourth motor (15), and a material bin rack (17) meshed with the material bin gear (16) and horizontally arranged, wherein the material bin rack (17) is fixedly installed at the bottom of the material storage rack (14), a plurality of rollers (14 a) are further installed at the bottom of the material storage rack (14), the fourth motor (15) is fixedly installed on the frame (1), a position sensor (18) is installed on one side of each material bin blanking pipe (12), the fourth motor (15) and each position sensor (18) are respectively electrically connected with the control and data processing unit (E), and the control and data processing unit (E) is a digital controller or an industrial personal computer with a human-computer interface.
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| CN201711085908.7A CN107966195B (en) | 2017-11-07 | 2017-11-07 | Weighing method and weighing device for powder material |
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| CN201711085908.7A CN107966195B (en) | 2017-11-07 | 2017-11-07 | Weighing method and weighing device for powder material |
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| CN107966195A CN107966195A (en) | 2018-04-27 |
| CN107966195B true CN107966195B (en) | 2024-03-12 |
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| CN109717155A (en) * | 2019-03-04 | 2019-05-07 | 浙江恒迅环保科技有限公司 | The equipment and method of black soldier flies processing organic waste |
| CN113086648B (en) * | 2021-04-12 | 2022-07-12 | 浙江中创科联智能装备技术有限公司 | Conveying and metering device for powder auxiliaries for printing and dyeing industry |
| CN113899385B (en) * | 2021-10-08 | 2023-05-30 | 南方医科大学南方医院 | Accurate counting device for disinfection supply center |
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| CN107966195A (en) | 2018-04-27 |
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