CN114515547A - Automatic control method for stirring reaction of cubic boron nitride material - Google Patents
Automatic control method for stirring reaction of cubic boron nitride material Download PDFInfo
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- 238000003756 stirring Methods 0.000 title claims abstract description 154
- 239000000463 material Substances 0.000 title claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 24
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 138
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims description 56
- 239000007788 liquid Substances 0.000 claims description 25
- 239000006260 foam Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000012257 stirred material Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2203/00—Processes utilising sub- or super atmospheric pressure
- B01J2203/06—High pressure synthesis
- B01J2203/065—Composition of the material produced
- B01J2203/066—Boronitrides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention provides an automatic control method for stirring reaction of cubic boron nitride materials. The automatic control method for the stirring reaction of the cubic boron nitride material comprises the following steps: stirring response device, controlgear and automatic control method stirring response device is including agitator tank, agitator motor, converter, first inlet tube, first water solenoid valve, second inlet tube, second water solenoid valve, row material pipe, baiting valve, shaking table, outlet pipe, play water solenoid valve, agitator motor sets up on the agitator tank for come to mix the stirring to the raw materials in the agitator tank, the converter is connected with agitator motor, is used for coming to control agitator motor. The automatic control method for the stirring reaction of the cubic boron nitride material, provided by the invention, can replace manual control, reduce the labor intensity of operators, improve the labor environment, improve the production efficiency, stabilize and improve the product quality, and save the labor cost and the loss of energy materials.
Description
Technical Field
The invention belongs to the technical field of automatic control, and particularly relates to an automatic control method for stirring reaction of a cubic boron nitride material.
Background
Cubic Boron Nitride (CBN) is an artificially synthesized superhard material synthesized from hexagonal boron nitride and a catalyst at high temperature and high pressure, is used as an engineering material, is often used as a material for manufacturing superhard cutters, and is widely applied to the processing industry of ferrous metals and alloy materials thereof. The CBN synthetic block contains impurities such as hexagonal boron nitride, pyrophyllite, graphite, magnesium, iron and the like, and purification treatment needs to be carried out through different working procedures from the synthetic block to a CBN finished product, and in the related technology, a method for purifying diamond or cubic boron nitride abrasive is disclosed, which comprises the following steps: adding sodium hydroxide and potassium hydroxide into diamond or cubic boron nitride containing pyrophyllite silicate, hexagonal boron nitride and silicon oxide, stirring for reaction, controlling the internal temperature at 130 ℃ and the external temperature at 240 ℃ and 250 ℃ respectively, closing a heating system after 2-4 hours, and discharging the product through a discharge port. The method of the invention can absolutely guarantee the product quality; in addition, the stirring is kept uniform, the consistency of the purification reaction ensures that the purity meets the requirement, the phenomenon of incomplete reaction of impurities does not exist, sodium hydroxide and potassium hydroxide are saved by 70 percent according to the process statistics, the comprehensive cost is reduced by 50 percent, and the method has good popularization and application value.
However, the structure has the defects that the stirring and crushing belong to the first process, materials react violently in the stirring and crushing process and release pungent corrosive smell, operators need to stand beside the mouth of the stirring tank in the reaction process, the water adding speed is manually controlled by manually pinching the soft plastic water pipe to adjust the water adding amount by depending on personal experience, so that the reaction speed of the materials in the stirring tank is controlled, the phenomenon that the liquid level overflows the stirring tank due to the fact that the reaction speed is too high is prevented, the repeated operation amount is large, and the automation degree and the safety are low. With the vigorous development of the processing and manufacturing industry, the demand of the CBN abrasive material is continuously increased, and the automation of the production line can reduce the labor intensity of workers, improve the labor environment, improve the production efficiency, stabilize and improve the product quality, and save the energy and the loss of materials.
Therefore, there is a need to provide a new automatic control method for stirring reaction of cubic boron nitride material to solve the above-mentioned technical problems
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automatic control method for stirring reaction of cubic boron nitride materials, which can replace manual control, reduce the labor intensity of operators, improve the labor environment, improve the production efficiency, stabilize and improve the product quality, and save the labor cost and the loss of energy materials.
In order to solve the technical problem, the automatic control method for stirring reaction of the cubic boron nitride material provided by the invention comprises the following steps: stirring reaction equipment, control equipment and automatic control method
The stirring reaction equipment comprises a stirring tank, a stirring motor, a frequency converter, a first water inlet pipe, a first water inlet electromagnetic valve, a second water inlet pipe, a second water inlet electromagnetic valve, a discharging pipe, a discharging valve, a shaking table, a water outlet pipe and a water outlet electromagnetic valve, wherein the stirring motor is arranged on the stirring tank and used for mixing and stirring raw materials in the stirring tank, the frequency converter is connected with the stirring motor and used for controlling the stirring motor, the first water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the first water inlet electromagnetic valve is arranged on the first water inlet pipe and used for controlling the first water inlet pipe, the second water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the second water inlet electromagnetic valve is arranged on the second water inlet pipe and used for controlling the second water inlet pipe, the discharging pipe is arranged on the stirring tank, the utility model provides a raw materials is discharged for coming in the agitator tank, the baiting valve sets up on arranging the material pipe for control row expects the pipe, the shaking table sets up in the below of arranging the material pipe, is used for coming to sieve the raw materials that the material pipe discharged, the outlet pipe sets up on the agitator tank, is used for coming to discharge the water in the agitator tank, the water solenoid valve sets up on the outlet pipe, is used for coming to control the outlet pipe.
As a further scheme of the invention, the analog input port on the PLC is connected with the two temperature measuring resistors and is used for receiving temperature information detected by the two temperature measuring resistors.
As a further scheme of the present invention, the analog quantity output port on the PLC controller is connected to the frequency converter for controlling the frequency converter, the switching quantity input/output port of the PLC controller is sequentially connected to the shaker, the water outlet solenoid valve, the first water inlet solenoid valve, and the second water inlet solenoid valve for controlling the shaker, the water outlet solenoid valve, the first water inlet solenoid valve, and the second water inlet solenoid valve, and the touch screen is connected to the PLC controller for displaying data information on the PLC controller and setting, storing, and retrieving parameters.
As a further scheme of the invention, the stirring tank is provided with a spraying device which is a circular tubular structure with the outer diameter slightly smaller than the diameter of the stirring tank opening, and a plurality of spraying holes facing the liquid level and the tank arm are arranged on the lower side of the pipeline in a staggered mode.
As a further scheme of the invention, a temperature acquisition module, a temperature comparison module and a temperature abnormity module are arranged in the PLC, and a monitoring program is arranged in the PLC.
As a further aspect of the present invention, the automatic control method includes the steps of:
(1) attaching two temperature measuring resistors to the outer wall of the stirring tank, wherein the positions of the two temperature measuring resistors are positioned at the middle lower part of the material liquid level in the tank;
(2) the two temperature measuring resistors are influenced by temperature to generate resistance value change, detected temperature information resistance value is converted into corresponding direct current signals in the range of 0-20mA, the current signals pass through an analog input port on the PLC, electric signals are converted into temperature values through a monitoring program and are transmitted to the touch screen, and a real-time temperature curve of material reaction during stirring is displayed through the touch screen;
(3) an operator can set a window for process parameter setting on a touch screen interface to set … … a plurality of sections of spraying temperatures and time periods according to varieties of corresponding stirring materials, wherein the number of the sections is determined by the sum of the early reaction time and each section of spraying time, and parameter values are set and stored, so that stored mature process curve parameters can be called when the stirring machine is used next time without inputting again;
(4) when the stirring tank starts to work, a certain amount of water is stored in the stirring tank, then the stirring motor is started to rotate at a low speed according to the frequency controlled by the frequency converter, an operator pours the materials into the stirring tank for stirring, and after the CBN material and the water are mixed, a violent reaction can occur, and a large amount of gas and heat can be released, so that a large amount of foam in the material-water mixed liquid continuously expands to cause the liquid level to rise (if measures are not taken in time, an accident can occur when the foam overflows out of the tank);
(5) when the reaction temperature of the materials in the stirring tank reaches a first spraying temperature at the early stage of the reaction, the monitoring program sends a control command to a first water inlet electromagnetic water valve on a first water inlet pipe through a switching value output port of the PLC controller, and opens the water valve to enable water with certain pressure to flow into the peripheral spraying equipment above the stirring tank, so that the spraying water is sprayed out through the spraying holes and can cover the liquid level and the peripheral tank wall, and the temperature of foams on the liquid level of the stirred materials is gradually reduced when the foams meet water;
(6) stopping spraying when the spraying time reaches the first spraying time, wherein the reaction time of the CBN mixed material is in direct proportion to the total weight of the material, so that the heat in the stirred material cannot be released at one time, and the heat can be completely released only by repeatedly stirring and crushing;
(7) when the temperature of the stirring liquid rises again and reaches a second spraying temperature, the first water inlet electromagnetic valve is opened again to cool and defoam the stirring liquid, when the second spraying time is reached, the spraying is stopped, the stirring is continued, the circulation control is carried out in such a way until the early reaction time is reached, the early reaction section can be finished, at the moment, the monitoring program simultaneously sends signals to the first water inlet electromagnetic valve and the second water inlet electromagnetic valve through the switching value output port of the PLC controller, so that the first water inlet electromagnetic valve and the second water inlet electromagnetic valve are simultaneously opened, the water paths are connected in parallel for use and are gathered in the spraying equipment, the water spraying amount in unit time is increased, at the moment, the monitoring program sends an instruction to the frequency converter of the stirring motor through the analog quantity output port of the PLC controller, the stirring frequency is increased to increase the stirring speed, and the discharge valve on the discharge pipe of the stirring tank is opened through the switching value output port of the PLC controller, making the stirred slurry flow to a shaking table through a discharge pipe for sorting;
(8) and when the total stirring time is up, the monitoring program automatically closes the first water inlet electromagnetic valve and the second water inlet electromagnetic valve, stops injecting water into the stirring tank, keeps running the stirrer to time until the stirring end waiting time, at the moment, the materials in the stirring tank completely fall down to the shaking table, and the monitoring program sends out a stop command of the frequency converter of the stirring motor, so that the automatic control work of the material reaction of the CBN stirring process is finished.
Compared with the related technology, the automatic control method for the stirring reaction of the cubic boron nitride material provided by the invention has the following beneficial effects:
the invention provides an automatic control method for stirring reaction of cubic boron nitride materials, which comprises the following steps:
1. the automatic control replaces manual control, the labor intensity of operators is reduced, the labor environment is improved, the production efficiency is improved, the product quality is stabilized and improved, and the labor cost and the loss of energy materials are saved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a control structure according to the present invention;
FIG. 2 is a control flow chart of the present invention.
Detailed Description
Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic diagram of a control structure according to the present invention;
FIG. 2 is a control flow chart of the present invention. The automatic control method for the stirring reaction of the cubic boron nitride material comprises the following steps: stirring reaction equipment, control equipment and automatic control method
The stirring reaction equipment comprises a stirring tank, a stirring motor, a frequency converter, a first water inlet pipe, a first water inlet electromagnetic valve, a second water inlet pipe, a second water inlet electromagnetic valve, a discharging pipe, a discharging valve, a shaking table, a water outlet pipe and a water outlet electromagnetic valve, wherein the stirring motor is arranged on the stirring tank and used for mixing and stirring raw materials in the stirring tank, the frequency converter is connected with the stirring motor and used for controlling the stirring motor, the first water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the first water inlet electromagnetic valve is arranged on the first water inlet pipe and used for controlling the first water inlet pipe, the second water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the second water inlet electromagnetic valve is arranged on the second water inlet pipe and used for controlling the second water inlet pipe, the discharging pipe is arranged on the stirring tank, the utility model provides a raw materials is discharged for coming in the agitator tank, the baiting valve sets up on arranging the material pipe for control row expects the pipe, the shaking table sets up in the below of arranging the material pipe, is used for coming to sieve the raw materials that the material pipe discharged, the outlet pipe sets up on the agitator tank, is used for coming to discharge the water in the agitator tank, the water solenoid valve sets up on the outlet pipe, is used for coming to control the outlet pipe.
And an analog input port on the PLC is connected with the two temperature measuring resistors and used for receiving temperature information detected by the two temperature measuring resistors.
Analog quantity output port on the PLC controller is connected with the frequency converter and is used for controlling the frequency converter, switching value input/output port of the PLC controller is sequentially connected with the shaking table, the water outlet electromagnetic valve, the first water inlet electromagnetic valve and the second water inlet electromagnetic valve and is used for controlling the shaking table, the water outlet electromagnetic valve, the first water inlet electromagnetic valve and the second water inlet electromagnetic valve, and the touch screen is connected with the PLC controller and is used for displaying data information on the PLC controller and setting, storing and calling parameters.
The stirring tank is provided with a spraying device, the spraying device is a circular tubular structure with the outer diameter slightly smaller than the diameter of the stirring tank opening, and a plurality of spraying holes facing the liquid level and the tank arm are arranged on the lower side of the pipeline in a staggered mode.
The temperature monitoring device is characterized in that a temperature acquisition module, a temperature comparison module and a temperature abnormity module are arranged in the PLC, and a monitoring program is arranged in the PLC.
The automatic control method comprises the following steps:
(1) attaching two temperature measuring resistors to the outer wall of the stirring tank, wherein the positions of the two temperature measuring resistors are positioned at the middle lower part of the material liquid level in the tank;
(2) the two temperature measuring resistors are influenced by temperature to generate resistance value change, detected temperature information resistance value is converted into corresponding direct current signals in the range of 0-20mA, the current signals pass through an analog input port on the PLC, electric signals are converted into temperature values through a monitoring program and are transmitted to the touch screen, and a real-time temperature curve of material reaction during stirring is displayed through the touch screen;
through setting up two temperature measuring resistors, one of them is as reference temperature, and is compared with the measured temperature, prevents to appear measuring error, and when the error of two temperatures reached a certain value, the system can indicate the temperature error to report to the police, and the staff need inspect and handle, and normal rear can work.
(3) An operator can set a window for process parameter setting on a touch screen interface to set … … a plurality of sections of spraying temperatures and time periods according to varieties of corresponding stirring materials, wherein the number of the sections is determined by the sum of the early reaction time and each section of spraying time, and parameter values are set and stored, so that stored mature process curve parameters can be called when the stirring machine is used next time without inputting again;
(4) when the stirring tank starts to work, a certain amount of water is stored in the stirring tank, then the stirring motor is started to rotate at a low speed according to the frequency controlled by the frequency converter, an operator pours the materials into the stirring tank for stirring, and after the CBN material and the water are mixed, a violent reaction can occur, and a large amount of gas and heat can be released, so that a large amount of foam in the material-water mixed liquid continuously expands to cause the liquid level to rise (if measures are not taken in time, an accident can occur when the foam overflows out of the tank);
(5) when the reaction temperature of the materials in the stirring tank reaches a first spraying temperature at the early stage of the reaction, the monitoring program sends a control command to a first water inlet electromagnetic water valve on a first water inlet pipe through a switching value output port of the PLC controller, and opens the water valve to enable water with certain pressure to flow into the peripheral spraying equipment above the stirring tank, so that the spraying water is sprayed out through the spraying holes and can cover the liquid level and the peripheral tank wall, and the temperature of foams on the liquid level of the stirred materials is gradually reduced when the foams meet water;
(6) stopping spraying when the spraying time reaches the first spraying time, wherein the reaction time of the CBN mixed material is in direct proportion to the total weight of the material, so that the heat in the stirred material cannot be released at one time, and the heat can be completely released only by repeatedly stirring and crushing;
(7) when the temperature of the stirring liquid rises again and reaches a second spraying temperature, the first water inlet electromagnetic valve is opened again to cool and defoam the stirring liquid, when the second spraying time is reached, the spraying is stopped, the stirring is continued, the circulation control is carried out in such a way until the early reaction time is reached, the early reaction section can be finished, at the moment, the monitoring program simultaneously sends signals to the first water inlet electromagnetic valve and the second water inlet electromagnetic valve through the switching value output port of the PLC controller, so that the first water inlet electromagnetic valve and the second water inlet electromagnetic valve are simultaneously opened, the water paths are connected in parallel for use and are gathered in the spraying equipment, the water spraying amount in unit time is increased, at the moment, the monitoring program sends an instruction to the frequency converter of the stirring motor through the analog quantity output port of the PLC controller, the stirring frequency is increased to increase the stirring speed, and the discharge valve on the discharge pipe of the stirring tank is opened through the switching value output port of the PLC controller, making the stirred slurry flow to a shaking table through a discharge pipe for sorting;
(8) and when the total stirring time is up, the monitoring program automatically closes the first water inlet electromagnetic valve and the second water inlet electromagnetic valve, stops injecting water into the stirring tank, keeps running the stirrer to time until the stirring end waiting time, at the moment, the materials in the stirring tank completely fall down to the shaking table, and the monitoring program sends out a stop command of the frequency converter of the stirring motor, so that the automatic control work of the material reaction of the CBN stirring process is finished.
Compared with the related technology, the automatic control method for the stirring reaction of the cubic boron nitride material provided by the invention has the following beneficial effects:
the invention provides an automatic control method for stirring reaction of cubic boron nitride materials, which replaces manual control with automatic control, reduces the labor intensity of operators, improves the labor environment, improves the production efficiency, stabilizes and improves the product quality, and saves the labor cost and the loss of energy materials.
It should be noted that, the device structure and the accompanying drawings of the present invention mainly describe the principle of the present invention, and in the technology of the design principle, the settings of the power mechanism, the power supply system, the control system, and the like of the device are not completely described, but on the premise that the skilled person understands the above inventive principle, the details of the power mechanism, the power supply system, and the control system can be clearly known, the control mode of the application document is automatically controlled by a controller, and the control circuit of the controller can be implemented by simple programming of the skilled person;
the standard parts used in the method can be purchased from the market, and can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the machines, parts and equipment adopt conventional models in the prior art, and the structure and the principle of the parts known by the skilled person can be known by technical manuals or conventional experimental methods.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments, or a direct or indirect use of these embodiments, without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents, as used in the related art, and all of which are intended to be encompassed by the present invention.
Claims (6)
1. An automatic control method for stirring reaction of cubic boron nitride material is characterized by comprising the following steps of;
stirring reaction equipment, control equipment and automatic control method
The stirring reaction equipment comprises a stirring tank, a stirring motor, a frequency converter, a first water inlet pipe, a first water inlet electromagnetic valve, a second water inlet pipe, a second water inlet electromagnetic valve, a discharging pipe, a discharging valve, a shaking table, a water outlet pipe and a water outlet electromagnetic valve, wherein the stirring motor is arranged on the stirring tank and used for mixing and stirring raw materials in the stirring tank, the frequency converter is connected with the stirring motor and used for controlling the stirring motor, the first water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the first water inlet electromagnetic valve is arranged on the first water inlet pipe and used for controlling the first water inlet pipe, the second water inlet pipe is arranged on the stirring tank and used for carrying out water injection spraying on the stirring tank, the second water inlet electromagnetic valve is arranged on the second water inlet pipe and used for controlling the second water inlet pipe, the discharging pipe is arranged on the stirring tank, a water solenoid valve sets up on the outlet pipe for come to discharge the raw materials in the agitator tank, the baiting valve sets up on arranging the material pipe, be used for controlling and arrange the material pipe, the shaking table sets up in the below of arranging the material pipe for come to sieve the raw materials that row material pipe discharged, the outlet pipe sets up on the agitator tank, is used for coming to discharge the water in the agitator tank, the setting of outlet pipe is on the outlet pipe, be used for coming to control the outlet pipe.
2. The method for automatically controlling the stirring reaction of the cubic boron nitride material as claimed in claim 1, wherein the analog input port of the PLC is connected with the two temperature measuring resistors for receiving the temperature information detected by the two temperature measuring resistors.
3. The method according to claim 2, wherein an analog output port of the PLC controller is connected to a frequency converter for controlling the frequency converter, a switching input/output port of the PLC controller is sequentially connected to the cradle, the water outlet solenoid valve, the first water inlet solenoid valve and the second water inlet solenoid valve for controlling the cradle, the water outlet solenoid valve, the first water inlet solenoid valve and the second water inlet solenoid valve, and the touch screen is connected to the PLC controller for displaying data information on the PLC controller and setting, storing and retrieving parameters.
4. A method as claimed in claim 2, wherein the stirring tank is provided with a spraying device, the spraying device is a circular tubular structure with an outer diameter slightly smaller than the diameter of the stirring tank opening, and a plurality of spraying holes facing the liquid level and the tank arm are arranged in staggered arrangement on the lower side of the pipeline.
5. The automatic control method for stirring reaction of cubic boron nitride material according to claim 1, wherein a temperature acquisition module, a temperature comparison module and a temperature abnormality module are provided in the PLC controller, and a monitoring program is provided in the PLC controller.
6. The automatic control method for stirring reaction of cubic boron nitride material according to claim 1, wherein the automatic control method comprises the steps of:
(1) attaching two temperature measuring resistors to the outer wall of the stirring tank, wherein the positions of the two temperature measuring resistors are positioned at the middle lower part of the material liquid level in the tank;
(2) the two temperature measuring resistors are influenced by temperature to generate resistance value change, detected temperature information resistance value is converted into corresponding direct current signals in the range of 0-20mA, the current signals pass through an analog input port on the PLC, electric signals are converted into temperature values through a monitoring program and are transmitted to the touch screen, and a real-time temperature curve of material reaction during stirring is displayed through the touch screen;
(3) an operator can set a window for process parameter setting on a touch screen interface to set … … a plurality of sections of spraying temperatures and time periods according to varieties of corresponding stirring materials, wherein the number of the sections is determined by the sum of the early reaction time and each section of spraying time, and parameter values are set and stored, so that stored mature process curve parameters can be called when the stirring machine is used next time without inputting again;
(4) when the stirring tank starts to work, a certain amount of water is stored in the stirring tank, then the stirring motor is started to rotate at a low speed according to the frequency controlled by the frequency converter, an operator pours the materials into the stirring tank for stirring, and after the CBN material and the water are mixed, a violent reaction can occur, and a large amount of gas and heat can be released, so that a large amount of foam in the material-water mixed liquid continuously expands to cause the liquid level to rise (if measures are not taken in time, an accident can occur when the foam overflows out of the tank);
(5) when the reaction temperature of the materials in the stirring tank reaches a first spraying temperature at the early stage of the reaction, the monitoring program sends a control command to a first water inlet electromagnetic water valve on a first water inlet pipe through a switching value output port of the PLC controller, and opens the water valve to enable water with certain pressure to flow into the peripheral spraying equipment above the stirring tank, so that the spraying water is sprayed out through the spraying holes and can cover the liquid level and the peripheral tank wall, and the temperature of foams on the liquid level of the stirred materials is gradually reduced when the foams meet water;
(6) stopping spraying when the spraying time reaches the first spraying time, wherein the reaction time of the CBN mixed material is in a direct proportion relation with the total weight of the material, so that the heat in the stirred material cannot be released at one time, and the heat can be completely released only by repeatedly stirring and crushing;
(7) when the temperature of the stirring liquid rises again and reaches a second spraying temperature, the first water inlet electromagnetic valve is opened again to cool and defoam the stirring liquid, when the second spraying time is reached, the spraying is stopped, the stirring is continued, the circulation control is carried out in such a way until the early reaction time is reached, the early reaction section can be finished, at the moment, the monitoring program simultaneously sends signals to the first water inlet electromagnetic valve and the second water inlet electromagnetic valve through the switching value output port of the PLC controller, so that the first water inlet electromagnetic valve and the second water inlet electromagnetic valve are simultaneously opened, the water paths are connected in parallel for use and are gathered in the spraying equipment, the water spraying amount in unit time is increased, at the moment, the monitoring program sends an instruction to the frequency converter of the stirring motor through the analog quantity output port of the PLC controller, the stirring frequency is increased to increase the stirring speed, and the discharge valve on the discharge pipe of the stirring tank is opened through the switching value output port of the PLC controller, making the stirred slurry flow to a shaking table through a discharge pipe for sorting;
(8) and when the total stirring time is up, the monitoring program automatically closes the first water inlet electromagnetic valve and the second water inlet electromagnetic valve, stops injecting water into the stirring tank, keeps running the stirrer to time until the stirring end waiting time, at the moment, the materials in the stirring tank completely fall down to the shaking table, and the monitoring program sends out a stop command of the frequency converter of the stirring motor, so that the automatic control work of the material reaction of the CBN stirring process is finished.
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