CN114634033A - Accurate feeding control method, butterfly valve mechanism and control method thereof - Google Patents
Accurate feeding control method, butterfly valve mechanism and control method thereof Download PDFInfo
- Publication number
- CN114634033A CN114634033A CN202210175259.4A CN202210175259A CN114634033A CN 114634033 A CN114634033 A CN 114634033A CN 202210175259 A CN202210175259 A CN 202210175259A CN 114634033 A CN114634033 A CN 114634033A
- Authority
- CN
- China
- Prior art keywords
- butterfly valve
- value
- blanking
- feeding
- actual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The application relates to an accurate feeding control method, which comprises the following steps: setting an initialization compensation value; collecting the initial mass of the hopper before blanking and recording the value; opening a butterfly valve for feeding, and calculating an actual feeding value, wherein the actual feeding value is a difference value between the initial mass of the hopper and the current real-time weight of the hopper; judging whether the actual blanking value is larger than or equal to the difference value between the preset blanking value and the compensation value, and immediately closing the butterfly valve when the condition is met; after detecting a butterfly valve closing completion signal, recording the actual hopper weight after the blanking is completed; calculating the final actual feeding amount, wherein the final actual feeding amount is equal to the difference between the initial mass of the hopper and the actual weight of the hopper after the feeding is finished; calculating blanking deviation which is equal to the difference between the preset blanking amount and the final actual blanking amount; a preferred compensation value; and rewriting the optimized compensation value into the register module to wait for the next use. This scheme can be solved and present feed mechanism who is applied to in the equipment has the inaccurate problem of unloading.
Description
Technical Field
The invention relates to the technical field of feeding methods, in particular to an accurate feeding control method, a butterfly valve mechanism and a control method thereof.
Background
The industrial-grade casting sand mold 3D printer promotes the revolution of the casting industry and drives the further development of the casting industry. The compounding module in the sand mould 3D printer is indispensable partly, and the homogeneity of compounding, the accuracy of ratio have decided whether the 3D printer can high quality, stably accomplish the printing work.
The function of the material mixing module is mainly as follows: uniformly mixing a certain weight of powder and liquid according to a fixed proportion. The material mixing module mainly comprises a feeding part, a blanking weighing system, a liquid material feeding module, a stirring and mixing device, a discharging part and the like. The working process of the material mixing module is as follows: the feeding part is used for adding powder on the ground or at a far position into the weighing module from the powder warehouse, then the powder with fixed weight is weighed by the blanking weighing system and added into the stirring and mixing device, and meanwhile, the liquid material adding module is used for adding liquid material matched with the powder in weight proportion into the stirring and mixing device; after the powder and the liquid are added, the stirring and mixing device can stir the powder and the liquid inside the stirring and mixing device until the powder and the liquid are uniformly mixed; finally, the mixed powder is transported to other parts for use by a discharge part.
The feeding part is particularly critical, the feeding is usually controlled by a pneumatic butterfly valve, a cylinder on one side is ventilated, and the butterfly valve is opened; the other side is ventilated, the butterfly valve is closed, and the control mode is simple and reliable and the butterfly valve is low in price. However, the control is the switching value control, the problems of too much blanking, sudden material overflow, long-time non-blanking and the like caused by the fact that a butterfly valve cannot be completely closed due to material clamping occur occasionally in the using process, and particularly in the situation of mixing multiple materials, the total mixed material amount can be influenced by inaccurate blanking, the adding proportion of the multiple materials can be influenced, and hidden troubles are buried in the subsequent printing work.
Of course, the above problems occur not only in 3D printing apparatuses but also in other apparatuses.
Disclosure of Invention
Therefore, it is necessary to provide an accurate feeding control method, a butterfly valve mechanism and a control method thereof for solving the problem of inaccurate blanking of a feeding mechanism applied to equipment at present.
In order to solve the problems, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention discloses an accurate feeding control method, including:
setting an initialization compensation value;
collecting the initial quality of the hopper before blanking and recording the value;
opening a butterfly valve for feeding, and calculating an actual feeding value, wherein the actual feeding value is a difference value between the initial mass of the hopper and the current real-time weight of the hopper;
judging whether the actual blanking value is larger than or equal to the difference value between the preset blanking value and the compensation value, and immediately closing the butterfly valve when the condition is met;
after detecting a butterfly valve closing completion signal, recording the actual hopper weight after the blanking is completed;
calculating the final actual feeding amount, wherein the final actual feeding amount is equal to the difference between the initial mass of the hopper and the actual weight of the hopper after the feeding is finished;
calculating blanking deviation which is equal to the difference between the preset blanking amount and the final actual blanking amount;
recording multiple blanking deviation data and optimizing to obtain an optimal compensation value;
and rewriting the optimized compensation value into the register module to wait for the next use.
In one embodiment, the setting of the initialization compensation value includes:
judging whether the compensation value is within a preset range, if not, adopting a manual compensation value; if yes, the compensation value is set as a preset compensation value.
In one embodiment, the recording multiple blanking deviation data and optimizing to obtain the preferred compensation value includes:
optimizing the plurality of deviation data to obtain a preferred compensation value, wherein the optimizing mode comprises calculating median, mode or average value of the plurality of deviation data.
In one embodiment, the precise feed control method further comprises:
and rejecting abnormal data by comparing a plurality of deviation data to obtain used deviation data.
In a second aspect, the embodiment of the invention discloses a butterfly valve mechanism, which is applied to the above precise feeding control method, and the butterfly valve mechanism comprises a three-position five-way center seal electromagnetic valve and a butterfly valve, wherein the three-position five-way center seal electromagnetic valve is connected with the butterfly valve, and the three-position five-way center seal electromagnetic valve is used for controlling the opening angle of the butterfly valve.
In one embodiment, the butterfly valve further comprises a control element, the control element is connected with the three-position five-way center seal electromagnetic valve, when the control element controls the left side of the three-position five-way center seal electromagnetic valve to be electrified, the butterfly valve is opened, and when the control element controls the right side of the three-position five-way center seal electromagnetic valve to be electrified, the butterfly valve is closed.
In one embodiment, the three-position five-way middle sealing electromagnetic valve comprises an open-inlet throttle valve and a close-inlet throttle valve, and the control part controls the opening and closing time of the butterfly valve by controlling the flow of the open-inlet throttle valve and the flow of the close-inlet throttle valve.
In a third aspect, an embodiment of the present invention discloses a control method for a butterfly valve mechanism, which is applied to the butterfly valve mechanism, the control method includes multiple control stages, and in a blanking process, the multiple control stages sequentially control the opening of the butterfly valve to gradually decrease.
In one embodiment, A is a set charging weight value; b is a real-time calculated blanking value; a, b and c are all charging deviation set thresholds, a is more than b and less than c, and the value range is 0-A;
x, y, z are the opening of the butterfly valveThe opening of the butterfly valve is set with a threshold value, x is more than y and less than z, and the value range is 0-90 degrees, and the control method is characterized by comprising four stages:
the first stage is as follows: and (3) enabling the blanking value B calculated in real time to be 0, entering a first interval: b is more than A-B and less than or equal to c, starting the first-stage feeding process, and controlling the opening of the butterfly valve to be x;
and a second stage: and (3) increasing the B value along with the feeding, and entering a second interval: a is more than A-B and less than or equal to B, and the opening of the butterfly valve is controlled to be y;
and a third stage: the B value continuously increases, and enters a third interval: A-B is more than 0 and less than or equal to a, and the opening of the butterfly valve is controlled to be z;
a fourth stage: when the set feeding weight value is equal to the blanking value calculated in real time, the butterfly valve is completely closed to finish feeding once
In one embodiment, the control method specifically includes:
adjusting a butterfly valve opening threshold;
adjusting the flow of the air inlet throttle valve and the air inlet throttle valve to enable the butterfly valve to act within 0-z degrees, and adjusting the acting time;
the optimal time point is obtained by adjusting the three-position five-way middle seal electromagnetic valve and respectively recording the time required by different stages when the butterfly valve is opened and closed;
charging verification and time correction;
setting a weight threshold value;
and verifying and optimizing the iterative model.
The technical scheme adopted by the invention can achieve the following beneficial effects:
in the accurate feeding control method disclosed by the embodiment of the invention, firstly, a mechanism of butterfly valve blanking compensation is utilized, on the premise of not increasing any cost, the accuracy of the feeding amount is optimized, so that the set feeding value is closer to the actual blanking value, and particularly, the accuracy of proportioning is increased under the condition of multiple material proportioning. The control mode is simple and reliable, and the butterfly valve is low in price. Simultaneously, through the accurate control to the feeding volume prevent that the butterfly valve from causing the unloading too much, suddenly the material that appears because of pressing from both sides the material and can not close totally, not blanking inaccurate problem such as long-time unloading, especially in the occasion that multiple material mixes, this kind of control method is less to the influence of total compounding total amount to the proportion of adding that makes many kinds of materials is more accurate, so that follow-up printing work, improvement printer prints product quality.
Drawings
Is free of
Detailed Description
The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for purposes of illustration only and do not represent the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention discloses a precise feeding control method, which specifically comprises the following steps:
s100, setting an initialization compensation value; this step is used to initialize a compensation value, which may be zero for the first blend.
And S200, collecting the initial mass of the hopper before blanking, and recording the value for the initial weight of the hopper for weighing.
S300, opening a butterfly valve for feeding, and calculating an actual feeding value, wherein the actual feeding value is a difference value between the initial mass of the hopper and the current real-time weight of the hopper.
S400, judging whether the actual blanking value is larger than or equal to the difference value between the preset blanking value and the compensation value, and immediately closing the butterfly valve when the condition is met. At the moment, the butterfly valve is closed, and the blanking weight is exactly equal to the subtracted compensation value, so that the difference between the actual blanking amount and the feeding set value is small.
And S500, after detecting a butterfly valve closing completion signal, recording the weight of the actual hopper after the blanking is completed, wherein the value is the weight of the actual hopper after the blanking is completed.
S600, calculating the final actual feeding amount, wherein the final actual feeding amount is equal to the difference between the initial mass of the hopper and the actual weight of the hopper after the feeding is finished.
S700, calculating blanking deviation, wherein the blanking deviation is equal to the difference between the preset blanking amount and the final actual blanking amount.
And S800, recording multiple blanking deviation data and optimizing to obtain an optimal compensation value. Along with compounding number of times is more and more, the data of some butterfly valves blanks will be accumulated certainly, a plurality of compensation data are processed, and compensation numerical values are optimized, so that after the materials are mixed for a plurality of times, the actual blanking value is closer to the set value, and the blanking precision of the equipment is improved.
And S900, rewriting the optimized compensation value into the register module, and waiting for the next use, namely waiting for the next use added into the program when the material mixing is initialized.
According to the accurate feeding control method disclosed by the embodiment of the invention, firstly, the accuracy of the feeding amount is optimized by using a butterfly valve blanking compensation mechanism on the premise of not increasing any cost, so that the set feeding value is closer to the actual blanking value, and the proportioning accuracy is increased particularly under the condition of multiple material proportioning. The control mode is simple and reliable, and the butterfly valve is low in price. Simultaneously, through the accurate control to the feeding volume prevent that the butterfly valve from causing the unloading too much, suddenly the material that appears because of pressing from both sides the material and can not close totally, not blanking inaccurate problem such as long-time unloading, especially in the occasion that multiple material mixes, this kind of control method is less to the influence of total compounding total amount to the proportion of adding that makes many kinds of materials is more accurate, so that follow-up printing work, improvement printer prints product quality.
In this embodiment of the present invention, step S100 may specifically include:
judging whether the compensation value is within a preset range, if not, adopting a manual compensation value; if so, the compensation value can be set as a preset compensation value. This way, the precision of the compensation value is higher, so that the subsequent feeding work is facilitated.
Further, step S800 may specifically include:
optimizing the plurality of deviation data to obtain a preferred compensation value, wherein the optimizing mode comprises calculating median, mode or average value of the plurality of deviation data. Under this kind of circumstances, the degree of accuracy of the preferred offset value is better to can be applicable to the accurate control to the feed more, so that follow-up printing work improves the printer and prints product quality.
The precise feeding control method disclosed by the embodiment of the invention also comprises the following steps:
by comparing a plurality of deviation data, abnormal data can be eliminated to obtain used deviation data. At the moment, some abnormal data are removed, and the residual compensation data are processed, for example, the median, mode or average value of the data are used, so that the compensation value is optimized, the actual blanking value is closer to the set value after multiple mixing, and the blanking precision of the equipment is improved.
Based on the accurate feeding control method disclosed by the embodiment of the invention, the embodiment of the invention also discloses a butterfly valve mechanism which is applied to the accurate feeding control method disclosed by any embodiment of the invention. According to the butterfly valve mechanism disclosed by the embodiment of the invention, the three-position five-way electromagnetic valve is used, so that the problem that the set value generated by blanking is inconsistent with the actual mixing value when the butterfly valve is closed is greatly reduced, and the mixing precision is improved.
In a specific application process, a three-position five-way middle seal electromagnetic valve is used for controlling the opening angle of a pneumatic butterfly valve, under the condition that coils on two sides of the three-position five-way middle seal electromagnetic valve are not electrified, an air source passes through the middle position of the three-position five-way middle seal electromagnetic valve, then air respectively passes through an air inlet throttling valve and an air inlet throttling valve, enters the butterfly valve, the air pressure on two sides of the butterfly valve is equal, and the butterfly valve does not act; when the left side of the three-position five-way middle sealing electromagnetic valve is electrified, the butterfly valve is opened, when the right side of the three-position five-way middle sealing electromagnetic valve is electrified, the butterfly valve is closed, the opening and closing time of the butterfly valve is controlled by adjusting the flow of the air inlet throttle valve and the air inlet throttle valve, the electromagnetic valve is controlled by pulse, and therefore the opening degree of the butterfly valve can be stopped at any position within 0-90 degrees, which is desired to be stopped.
Furthermore, the butterfly valve mechanism disclosed by the embodiment of the invention can further comprise a control element, wherein the control element is connected with the three-position five-way middle seal electromagnetic valve, when the control element controls the left side of the three-position five-way middle seal electromagnetic valve to be electrified, the butterfly valve is opened, and when the control element controls the right side of the three-position five-way middle seal electromagnetic valve to be electrified, the butterfly valve is closed. Under the condition, the butterfly valve mechanism can be controlled more accurately through the control piece, so that the automation level is improved.
In the embodiment disclosed by the invention, the three-position five-way middle sealing electromagnetic valve can comprise an air inlet opening throttle valve and an air inlet closing throttle valve, and the control element can control the opening and closing time of the butterfly valve by controlling the flow of the air inlet opening throttle valve and the air inlet closing throttle valve. At the moment, the feeding butterfly valve is controlled in a stepped and accurate mode by combining a butterfly valve position stepped method, the problem that a set value generated by blanking is inconsistent with an actual mixing value when the butterfly valve is closed is greatly reduced, and the mixing accuracy is higher.
Based on the butterfly valve mechanism disclosed by the embodiment of the invention, the embodiment of the invention also discloses a control method of the butterfly valve mechanism, which is applied to the butterfly valve mechanism disclosed by any embodiment of the invention.
Specifically, in the following examples, a is a set weight value of charge; b is a blanking value calculated in real time; a, b and c are all charging deviation set thresholds, a is more than b and less than c, and the value range is 0-A;
setting threshold values for the opening degrees of the butterfly valves, wherein x, y and z are set as the opening degrees of the butterfly valves, x is more than y and less than z, and the value range is 0-90 degrees, wherein the control method can comprise four stages:
the first stage is as follows: and (3) enabling the blanking value B calculated in real time to be 0, entering a first interval: b is more than A-B and less than or equal to c, starting the first-stage feeding process, and controlling the opening of the butterfly valve to be x;
and a second stage: and (3) increasing the B value along with the feeding, and entering a second interval: a is more than A-B and less than or equal to B, and the opening of the butterfly valve is controlled to be y;
and a third stage: the B value continuously increases, and enters a third interval: A-B is more than 0 and less than or equal to a, and the opening of the butterfly valve is controlled to be z;
a fourth stage: when the set feeding weight value is equal to the blanking value calculated in real time, the butterfly valve is completely closed, and one-time feeding is completed.
For example: if a is 15kg, the values of a, b and c may be set to 5kg, b 10kg and c 15kg, but the values are not limited to the examples and more reasonable values may be determined by actual experiments; in a 3-stage model, x, y, and z may be set to 30 °, 60 °, 90 °, but not limited to these values, and for a material with good flowability, the maximum limit and the feedback limit of the butterfly valve may be adjusted, and the maximum opening of the butterfly valve is controlled to be less than 90 °, for example, 25 °, 50 °, 75 °, or z.
By the method, the problem of inaccurate weighing caused by too much blanking caused by maximum closing to minimum closing of the butterfly valve in the moment can be prevented, the situation that the butterfly valve cannot be stuck and opened or cannot be stuck and closed due to the pressure effect of materials in the upper hopper on the butterfly valve can be relieved, and meanwhile, the problem that a set value generated by blanking is inconsistent with an actual material mixing value when the butterfly valve is closed can be greatly reduced, so that the material mixing accuracy is improved.
Correspondingly, in the embodiment of the invention, when the butterfly valve is in a closed state, the forces applied to two sides of the rotating shaft of the butterfly valve by the materials in the hopper are approximately equal, when the butterfly valve is opened, the butterfly valve can be opened only by overcoming the pressure of the materials on one side, and if the feeding process is in the first stage, pulse voltages can be respectively applied to the electromagnetic valves on two sides of the three-position five-way middle seal electromagnetic valve, so that the valve is quickly switched on and off, the valve plate of the butterfly valve is quickly shaken to increase the feeding speed, and the butterfly valve is prevented from being blocked and cannot be opened.
In the embodiment of the disclosure, the butterfly valve is when the open mode, the material probably contains very little granule in the hopper, if reinforced flow gets into the fourth stage in above-mentioned formula, a period after the butterfly valve sends the close order, still can not detect the butterfly valve and close the signal completely, and reinforced volume continues to increase moreover, then can be through sealing solenoid valve both sides solenoid valve respectively and applying impulse voltage in giving the tribit five-way, make the quick switch of valve switch 1-2 times, let the caking material fall down, thereby close the butterfly valve, prevent that long-time material from spilling and cause the unloading too much, influence the compounding effect.
In one embodiment, the disclosed control method may specifically include:
adjusting a butterfly valve opening threshold. Setting the butterfly valve action threshold value according to the butterfly valve caliber and the set blanking weight value, such as 0-z degrees.
And adjusting the flow of the air inlet throttle valve and the air inlet throttle valve to enable the butterfly valve to act within 0-z degrees and adjust the acting time.
The optimal time point is obtained by adjusting the three-position five-way middle sealing electromagnetic valve and respectively recording the time required by different stages of the butterfly valve when the butterfly valve is opened and closed. Specifically, the time required for the butterfly valve to open is recorded in the ranges of 0 ° → x °, 0 ° → y °, 0 ° → z ° and x ° → y °, y ° → z °, and the time required for the butterfly valve to close is recorded in the ranges of z ° → y °, y ° → x °, x ° → 0 ° and z ° → 0 °, y ° → 0 °, z ° → x °, and the time required for the butterfly valve to close is recorded in the register.
Charging verification and time correction. Because of the influence of material resistance, there may be the deviation in actual butterfly valve on-off time analog process and actual unloading, carry out optimization time according to the position of butterfly valve switch in the actual unloading process, make the butterfly valve under actual control stop near the position of settlement.
A weight threshold is set. According to the caliber of the butterfly valve, the blanking set weight and the material fluidity, set threshold values a, b and c of feeding deviation are set, and generally, for a 3-step feeding model, the method comprises the following steps
c is A. The value can also be optimized according to the actual use condition, and a linear model is adopted in the example, and other nonlinear models such as an exponential model can also be used.
And verifying and optimizing the iterative model. Through each blanking data statistics, it is necessary to add an angle sensor to the butterfly valve, count the situation of the control position of the butterfly valve at each time, and optimize the model until accurate control is achieved.
Under the condition, the stirring time and the stirring speed of different proportions and the mixing amount are subjected to segmented table look-up accurate control, so that the mixing is more uniform, the mixing time and the mixing rotating speed can be reduced as much as possible, the abrasion of mechanical parts is reduced, the mixing time is shortened, and the service life of each part is prolonged.
Correspondingly, in the embodiment of the invention, the mixing time is related to the mixing amount and the proportion of various materials, so that formula data in a database are used for matching aiming at different mixing weights and liquid material adding proportions of each type and one type, and proper mixing time and stirring speed are selected for mixing, thereby ensuring the uniformity of mixing. Specifically, when liquid material ratio is selected, the mixing amount is set, the system can execute a feeding process, after the feeding process is finished, the system detects the actual feeding amount, mixing time and the mixing motor rotating speed which are set before in a database are searched, mixing is started, and the mixing is automatically stopped after the mixing time is up. The material mixing machine can achieve the purpose of uniform material mixing, and can reduce the material mixing time and the material mixing rotating speed as much as possible, thereby reducing the abrasion of mechanical parts, shortening the material mixing time and prolonging the service life of each part.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A method of precision feed control, comprising:
setting an initialization compensation value;
collecting the initial quality of the hopper before blanking and recording the value;
opening a butterfly valve for feeding, and calculating an actual feeding value, wherein the actual feeding value is a difference value between the initial mass of the hopper and the current real-time weight of the hopper;
judging whether the actual blanking value is larger than or equal to the difference value between the preset blanking value and the compensation value or not, and immediately closing the butterfly valve when the condition is met;
after detecting a butterfly valve closing completion signal, recording the actual hopper weight after the blanking is completed;
calculating the final actual blanking amount, wherein the final actual blanking amount is equal to the difference between the initial mass of the hopper and the actual weight of the hopper after blanking is finished;
calculating blanking deviation which is equal to the difference between the preset blanking amount and the final actual blanking amount;
recording multiple blanking deviation data and optimizing to obtain an optimal compensation value;
and rewriting the optimized compensation value into the register module to wait for the next use.
2. The accurate feed control method of claim 1 wherein the setting an initial compensation value comprises:
judging whether the compensation value is within a preset range, if not, adopting a manual compensation value; if yes, the compensation value is set as a preset compensation value.
3. The accurate feed control method of claim 1 wherein the recording multiple blanking offsets and optimizing to obtain a preferred offset comprises:
optimizing the plurality of deviation data to obtain a preferred compensation value, wherein the optimizing mode comprises calculating median, mode or average value of the plurality of deviation data.
4. The precision feed control method of claim 3 further comprising:
and rejecting abnormal data by comparing a plurality of deviation data to obtain used deviation data.
5. A butterfly valve mechanism applied to the precise feeding control method according to any one of claims 1 to 4, characterized in that the butterfly valve mechanism comprises a three-position five-way center seal electromagnetic valve and a butterfly valve, wherein the three-position five-way center seal electromagnetic valve is connected with the butterfly valve, and the three-position five-way center seal electromagnetic valve is used for controlling the opening angle of the butterfly valve.
6. The butterfly valve mechanism of claim 5 further comprising a control member coupled to the three position, five way center seal solenoid valve, the butterfly valve opening when the control member controls the left side of the three position, five way center seal solenoid valve to be energized and closing when the control member controls the right side of the three position, five way center seal solenoid valve to be energized.
7. The butterfly valve mechanism of claim 6 wherein the three-position, five-way, center-sealed solenoid valve includes an open intake throttle valve and a closed intake throttle valve, and the control controls the opening and closing time of the butterfly valve by controlling the amount of flow through the open intake throttle valve and the closed intake throttle valve.
8. A control method of a butterfly valve mechanism, which is applied to the butterfly valve mechanism of any one of claims 5 to 7, characterized in that the control method comprises a plurality of control stages, and the plurality of control stages sequentially control the opening of the butterfly valve to gradually decrease in the blanking process.
9. The control method of a butterfly valve mechanism according to claim 8, wherein a is a set charge weight value; b is a real-time calculated blanking value; a, b and c are all charging deviation set thresholds, a is more than b and less than c, and the value range is 0-A;
setting threshold values for the opening of the butterfly valve, wherein x, y and z are all butterfly valve openings, x is more than y and less than z, and the value range is 0-90 degrees, and the control method is characterized by comprising four stages:
the first stage is as follows: and (3) enabling the blanking value B calculated in real time to be 0, entering a first interval: b is more than A-B and less than or equal to c, starting the first-stage feeding process, and controlling the opening of the butterfly valve to be x;
and a second stage: and (3) increasing the B value along with the feeding, and entering a second interval: a is more than A-B and less than or equal to B, and the opening of the butterfly valve is controlled to be y;
and a third stage: the B value continuously increases, and enters a third interval: A-B is more than 0 and less than or equal to a, and the opening of the butterfly valve is controlled to be z;
a fourth stage: when the set feeding weight value is equal to the blanking value calculated in real time, the butterfly valve is completely closed, and one-time feeding is completed.
10. The method for controlling a butterfly valve mechanism according to claim 9, comprising:
adjusting a butterfly valve opening threshold;
adjusting the flow of the air inlet throttle valve and the air inlet throttle valve to enable the butterfly valve to act within 0-z degrees, and adjusting the acting time;
the optimal time point is obtained by adjusting the three-position five-way middle seal electromagnetic valve and respectively recording the time required by different stages when the butterfly valve is opened and closed;
charging verification and time correction;
setting a weight threshold value;
and verifying and optimizing the iterative model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210175259.4A CN114634033A (en) | 2022-02-26 | 2022-02-26 | Accurate feeding control method, butterfly valve mechanism and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210175259.4A CN114634033A (en) | 2022-02-26 | 2022-02-26 | Accurate feeding control method, butterfly valve mechanism and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114634033A true CN114634033A (en) | 2022-06-17 |
Family
ID=81948707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210175259.4A Pending CN114634033A (en) | 2022-02-26 | 2022-02-26 | Accurate feeding control method, butterfly valve mechanism and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114634033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129064A (en) * | 2023-08-23 | 2023-11-28 | 深圳市尚水智能股份有限公司 | Powder weighing control method, device and equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2578637Y (en) * | 2002-02-08 | 2003-10-08 | 深圳市清泉水系统工程设备有限公司 | Controller of digital pneuamtic adjustable butterfly valve |
| CN101963525A (en) * | 2009-07-23 | 2011-02-02 | 宝山钢铁股份有限公司 | Method for improving weighing precision of charging system and device thereof |
| CN108757959A (en) * | 2018-07-20 | 2018-11-06 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| JP2019006438A (en) * | 2017-06-22 | 2019-01-17 | 株式会社高垣製作所 | Butterfly valve control system and butterfly valve control method |
| CN208885990U (en) * | 2018-07-20 | 2019-05-21 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| CN112169606A (en) * | 2020-09-03 | 2021-01-05 | 深圳市波赛斯自动化科技有限公司 | Blanking weight control algorithm of weighing type mixer |
| KR102330729B1 (en) * | 2020-07-08 | 2021-11-25 | 오정란 | Butterfly valve control Device |
-
2022
- 2022-02-26 CN CN202210175259.4A patent/CN114634033A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2578637Y (en) * | 2002-02-08 | 2003-10-08 | 深圳市清泉水系统工程设备有限公司 | Controller of digital pneuamtic adjustable butterfly valve |
| CN101963525A (en) * | 2009-07-23 | 2011-02-02 | 宝山钢铁股份有限公司 | Method for improving weighing precision of charging system and device thereof |
| JP2019006438A (en) * | 2017-06-22 | 2019-01-17 | 株式会社高垣製作所 | Butterfly valve control system and butterfly valve control method |
| CN108757959A (en) * | 2018-07-20 | 2018-11-06 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| CN208885990U (en) * | 2018-07-20 | 2019-05-21 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| KR102330729B1 (en) * | 2020-07-08 | 2021-11-25 | 오정란 | Butterfly valve control Device |
| CN112169606A (en) * | 2020-09-03 | 2021-01-05 | 深圳市波赛斯自动化科技有限公司 | Blanking weight control algorithm of weighing type mixer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129064A (en) * | 2023-08-23 | 2023-11-28 | 深圳市尚水智能股份有限公司 | Powder weighing control method, device and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114634033A (en) | Accurate feeding control method, butterfly valve mechanism and control method thereof | |
| US8591098B2 (en) | Apparatus and method for material blending | |
| US8666557B2 (en) | Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace | |
| CA1269831A (en) | Process for controlling the charging of a shaft furnace | |
| CN112642584A (en) | Dense medium clean coal ash content control method based on fuzzy control and PID control | |
| CN100371840C (en) | On-line weighing dispensing method based on feed speed control | |
| CN101606046B (en) | Material metering system | |
| KR101590113B1 (en) | Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace | |
| CN113119591A (en) | Printing raw material consumption metering method in closed ink cavity | |
| CN112780625A (en) | Flow control valve with pressure compensation and high-precision flow control method | |
| JP2918731B2 (en) | Foundry sand measuring device | |
| CN216727010U (en) | Raw material batching feeding system in boiling chlorination technology | |
| CN113249564A (en) | Intelligent pile changing method for sintering and blending ore | |
| JPH02187141A (en) | Quantitatively compounding method for solution | |
| CN208313396U (en) | Metering control system for valve plate dosing machine | |
| CN206185080U (en) | A automatic sand mulling device for wetting sand preparation | |
| CN108469288B (en) | Metering control system for valve plate metering machine and corresponding control method | |
| CN112631121A (en) | Automatic monitoring control method and system for cement self-supporting type rolling mill | |
| JPS6082818A (en) | Automatic measuring method of pulverulent material | |
| CN219357234U (en) | Automatic raw material batching and feeding system | |
| JPH10142035A (en) | Method and instrument for weighting and supplying raw material | |
| CN220315366U (en) | Air conveying chute capable of adjusting powder discharge flow | |
| JPS60159103A (en) | Method for charging raw material to vertical furnace | |
| JP3478529B2 (en) | Powder supply method | |
| JP2003130718A (en) | Metering control method for bulk cargo by metering apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |