CN202814527U - Small-range hopper scale special for trace batching - Google Patents
Small-range hopper scale special for trace batching Download PDFInfo
- Publication number
- CN202814527U CN202814527U CN 201220264909 CN201220264909U CN202814527U CN 202814527 U CN202814527 U CN 202814527U CN 201220264909 CN201220264909 CN 201220264909 CN 201220264909 U CN201220264909 U CN 201220264909U CN 202814527 U CN202814527 U CN 202814527U
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- small
- range
- trace
- batching
- frequency converter
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Abstract
A small-range hopper scale special for trace batching relates to an improvement in the hopper scale structure of the trace batching system which is commonly used in the industrial automation. The utility model provides the small-range hopper scale special for trace batching, which is accurate in flow control, small in control deviation, low in raw material consumption, and long-term stable in products. The small-range hopper scale comprises a PLC main controller and a drive frequency converter, and is characterized in that the PLC main controller outputs a group of control signals proportional to the spiral rotation speed of a feeding screw by detecting the weight of a weight bin, and the control signals drive the frequency converter to adjust the feeding speed rate of the feeding screw in a certain range.
Description
Technical field
The utility model relates to the improvement of the bunker scale structure of micro-batching system commonly used in a kind of industrial automation.
Background technology
Bunker scale in the existing Micro-feeding system mainly is the weight that detects the weighing storehouse by measuring instrument, then control flow by the start and stop metering screw, the defective of its existence is that flow is by the rough control of switch, and can not control accurately, general control deviation＞20%, thereby caused certain raw-material consumption, also can't guarantee the long-time stability of product.
Summary of the invention
The utility model is exactly for the deficiencies in the prior art, provides a kind of and can accurately control flow, that control deviation is little, the special-purpose small-range bunker scale of reduction micro-ingredients raw materials consumption, the product long-term stability.
For achieving the above object, the utility model adopts following technical scheme, the utility model comprises the PLC master controller and drives frequency converter, its structural feature is that the PLC master controller is exported one group of control signal that is directly proportional with the revolution speed of screw of pressure feeding spiral by the weight that detects the weighing storehouse, and this control signal drives frequency converter can regulate the delivery rate of pressure feeding spiral within the specific limits; Namely set in advance an inertial parameter, system's high speed signal of output removed to drive frequency converter with higher speed operation when the weighing storehouse weight that detects when the PLC master controller and setting value differed larger, when weighing storehouse weight that the PLC master controller detects reach setting value 70% the time system's output middling speed signal driver frequency converter with more slowly speed blanking, when weighing storehouse weight that the PLC master controller detects greater than setting value 90% the time system's dead slow speed signal controlling pressure feeding spiral of output very slowly blanking, system no longer exports control signal when weighing storehouse weight that the PLC master controller detects meets requiring of setting value and inertial parameter value, pressure feeding spiral stops operating, the mode by this multi-change speed can make the control accuracy of feed reach≤0.5%.
The utility model beneficial effect:
The utility model is by the special-purpose control device of improvement micro-ingredients the rough control of switching value of the prior art to be changed into adopting the PLC master controller and driving frequency converter carrying out analog quantity accurate quantification control mode, it can be so that the control accuracy of feed≤0.5%, thereby can greatly reduce raw-material loss, also help very much the control of industrial automation, more be conducive to control the long-time stability of product.
Description of drawings
Fig. 1 is structural principle frame diagram of the present utility model.
The 1-PLC master controller; The 2-frequency converter; The 3-man machine operation interface; The 4-pressure feeding spiral; 5-weighing storehouse; The 6-detection terminal.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, following each description only is used for illustrating embodiment of the present utility model, to the not restriction of the utility model protection domain.
The utility model comprises PLC master controller 1 and frequency converter 2, PLC master controller 1 is exported one group of control signal that is directly proportional with the revolution speed of screw of pressure feeding spiral 4 by the weight that detects weighing storehouse 5, and this control signal drives frequency converter 2 can regulate the delivery rate of pressure feeding spiral 4 within the specific limits; Namely set in advance an inertial parameter, high speed signal of system's output removes to drive frequency converter 2 with higher speed operation when weighing storehouse 5 weight that PLC master controller 1 detects and setting value differ larger, when weighing storehouse 5 weight that PLC master controller 1 detects reach setting value 70% the time system's output middling speed signal driver frequency converter 2 with more slowly speed blanking, when weighing storehouse 5 weight that PLC master controller 1 detects greater than setting value 90% the time system's output dead slow speed signal controlling pressure feeding spiral 4 very slowly blankings, system is in the output control signal when weighing storehouse 5 weight that PLC master controller 1 detects meet requiring of setting value and inertial parameter value, pressure feeding spiral 4 stops operating, the mode by this multi-change speed can make the control accuracy of feed reach≤0.5%.
In the actual use procedure, control PLC master controller 1 by man machine operation interface 3, during real work, be arranged on the signal source that the detection terminal 6 on the weighing storehouse 5 exports and after amplifying, feed back to PLC master controller 1, PLC master controller 1 is exported one group of control signal that is directly proportional with the revolution speed of screw of pressure feeding spiral 4 according to the signal source that obtains, and this control signal drives frequency converter 2 can regulate the delivery rate of pressure feeding spiral 4 within the specific limits.
Claims (1)
1. the special-purpose small-range bunker scale of micro-ingredients, it is characterized in that: comprise PLC master controller (1) and frequency converter (2), PLC master controller (1) is exported one group of control signal that is directly proportional with the revolution speed of screw of pressure feeding spiral (4) by the weight that detects weighing storehouse (5), and this control signal drives frequency converter (2) can regulate the delivery rate of pressure feeding spiral (4) within the specific limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220264909 CN202814527U (en) | 2012-06-01 | 2012-06-01 | Small-range hopper scale special for trace batching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220264909 CN202814527U (en) | 2012-06-01 | 2012-06-01 | Small-range hopper scale special for trace batching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202814527U true CN202814527U (en) | 2013-03-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220264909 Expired - Fee Related CN202814527U (en) | 2012-06-01 | 2012-06-01 | Small-range hopper scale special for trace batching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202814527U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132723A (en) * | 2014-08-07 | 2014-11-05 | 山东金宇实业股份有限公司 | Dosing mechanism and medicine conveying system |
| CN104374461A (en) * | 2014-12-08 | 2015-02-25 | 国乐忠 | Static solid material metering weigher |
| CN114343312A (en) * | 2018-11-20 | 2022-04-15 | Lg 法鲁克股份公司 | Hair dye supply system |
-
2012
- 2012-06-01 CN CN 201220264909 patent/CN202814527U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132723A (en) * | 2014-08-07 | 2014-11-05 | 山东金宇实业股份有限公司 | Dosing mechanism and medicine conveying system |
| CN104374461A (en) * | 2014-12-08 | 2015-02-25 | 国乐忠 | Static solid material metering weigher |
| CN114343312A (en) * | 2018-11-20 | 2022-04-15 | Lg 法鲁克股份公司 | Hair dye supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20210601 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |