CN208276126U - Sand mixer curing agent liquid material control system based on PLC - Google Patents
Sand mixer curing agent liquid material control system based on PLC Download PDFInfo
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- CN208276126U CN208276126U CN201820465560.8U CN201820465560U CN208276126U CN 208276126 U CN208276126 U CN 208276126U CN 201820465560 U CN201820465560 U CN 201820465560U CN 208276126 U CN208276126 U CN 208276126U
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Abstract
The sand mixer curing agent liquid material control system based on PLC that the utility model discloses a kind of, including touch screen, the PLC control unit being attached thereto, the sand temperature sensor for being connected to by temperature conversion module PLC control unit, the frequency converter being connect with PLC control unit and the catalyst pump being connect with frequency converter, sand temperature sensor acquires temperature in sand hopper, and sends collected temperature signal to PLC control unit after temperature conversion module is converted；PLC control unit receives temperature signal and is transferred to touch screen and receives the control signal of touch screen transmission；Touch screen receives the temperature signal and real-time display temperature information and for operator's input control signal of PLC control unit transmission；Frequency converter receives the control signal of PLC control unit transmission and controls the electric machine frequency of catalyst pump.The utility model can realize online automatic control in real time, improve precise control rate, guarantee quality of shaking out, and reduce liquid material waste.
Description
Technical field
The utility model relates to sand mixer fields, particularly, are related to a kind of sand mixer curing agent liquid material control based on PLC
System.
Background technique
Traditional sand mixer liquid material supply is mainly manually to control motor by the setting to frequency converter, to drive
Liquid material pump, then atomizer is entered by fluid feed valve.Having several liquid materials just has several liquid feeding systems, these systems are to separate independently
's.Liquid material supply amount number and control mainly determined by the setting of frequency converter, i.e., it is enterprising in frequency converter in advance
Row setting, it is not only time-consuming but also inaccurate, and without good man-machine interface, the factor of especially all kinds of influence Quality of Mixing Sand is once sent out
Changing, it is even more impossible to accomplish on line real time control.
The amount that curing agent is added plays a crucial role the shaping of sand mo(u)ld and intensity, also will affect the matter of casting
Amount.Curing agent be injected into sand screw conveyor by pumping by pipeline, and the conveying speed of sand is fixed, then
The factor for influencing curing agent additional amount is exactly the electric machine frequency of catalyst pump.
In conventional methods where, generally using fixed acidity or a kind of curing agent of curing rate, and curing agent frequency is all
It is configured manually by veteran master craftsman, this method drawback has three:
(1) poor accuracy.As long as manually adjusting, inevitably it is deviated, and the inertia of people makes so, will not adjust very smart
Really, or even in certain occasions, understand the phenomenon that tune, misadjustment are leaked in outlet.
(2) inheritance is poor.Once master craftsman's retirement is resigned, it is difficult to grasp the Rule adjusting of frequency in new person's short time,
Gap between generations certainly will influence the production efficiency of factory.
(3) operability is not strong.Various factors due to influencing Quality of Mixing Sand in actual production often changes, and passes through adjusting
A kind of additional amount of single curing agent (acidity is certain or curing rate is certain) has been not enough to adjust to control Quality of Mixing Sand.
Utility model content
The utility model provides a kind of sand mixer curing agent liquid material control system based on PLC, is passed through with solving tradition
Manually is preset to frequency converter the technical issues of control liquid material pump leads to time-consuming, poor accuracy.
The technical solution adopted in the utility model is as follows:
A kind of sand mixer curing agent liquid material control system based on PLC is controlled including touch screen, the PLC connecting with touch screen
Unit processed, the sand temperature sensor that PLC control unit is connected to by temperature conversion module, the frequency conversion being connect with PLC control unit
Device and the catalyst pump being correspondingly connected with frequency converter, sand temperature sensor is for acquiring temperature in sand hopper, and by collected temperature
Degree signal sends PLC control unit to after temperature conversion module is converted；PLC control unit is for receiving temperature signal and transmitting
The control signal transmitted to touch screen and for receiving touch screen；Touch screen is used to receive the temperature of PLC control unit transmission
Signal and real-time display temperature information and for operator's input control signal；Frequency converter is for receiving PLC control unit transmission
Control signal and according to control signal control catalyst pump electric machine frequency.
Further, PLC control unit connects the first frequency converter and the second frequency converter, the first frequency converter and the first curing agent
Pump is correspondingly connected with, and the first catalyst pump is connected to the first curing agent bucket, and the first catalyst pump is connected to atomization by the first delivery pipe
Nozzle；Second frequency converter is correspondingly connected with the second catalyst pump, and the second catalyst pump is connected to the second curing agent bucket, the second curing agent
Pump is connected to atomizer by the second delivery pipe；First catalyst pump, the second catalyst pump respectively drive the first curing agent bucket,
Curing agent liquid material passes through the first delivery pipe to two kinds of differences in second curing agent bucket respectively, the second delivery pipe is sent to atomizer,
And stirring cage of sand mixer is entered by atomizer.
Further, the first return pipe for being connected to the first curing agent bucket is provided in the first delivery pipe；Second delivery pipe
On be provided with the second return pipe for being connected to the second curing agent bucket.
Further, control system further includes the first solenoid valve and for being respectively used to control two kinds of curing agent liquid materials conveying
Two solenoid valves, the first solenoid valve are set in the first delivery pipe between atomizer and the first catalyst pump, second solenoid valve
It is set in the second delivery pipe between atomizer and the second catalyst pump, PLC control unit is separately connected the first solenoid valve
And second solenoid valve, for controlling the power on/off of the two.
Further, PLC control unit is connected to interchanger by Ethernet interface, and interchanger is connected to touch screen.
Further, PLC control unit includes power module, central processing module, On-off signal output module and mould
Analog quantity input/output module；The input terminal of power module connects external power supply, and output end is connected to central processing module, switching value
The power input of input/output module and analog input and output module；Central processing module exports mould with On-off signal respectively
Block, analog input and output module and touch screen connection；Analog input and output module is connected to frequency converter.
Further, sand temperature sensor is connected to analog input and output module through temperature conversion module.
Further, touch screen is installed on the forearm front end of sand mixer.
The utility model is using PLC control unit as control core, and touch screen is as human-computer interaction interface, to sand mixer
The frequency of catalyst pump carry out opened loop control, while increasing sand temperature sensor and acquiring temperature in sand hopper in real time, and by temperature value
It is sent to PLC control unit, when staff carries out manipulation input control signal on the touchscreen, PLC control unit is received
Control signal is simultaneously transferred to frequency converter, realizes the frequency setting and adjustment function online to frequency converter, and then exported by frequency converter
Signal, so that the output flow for solidifying pump be made to change with the variation of setting value, makes sand to control the motor speed of catalyst pump
The intensity of type and solidification reach reasonable and stablize, it can be achieved that online automatic control in real time, improves the accuracy rate of control, and can protect
The quality of shaking out under varying environment, different production objects is demonstrate,proved, the unnecessary waste of liquid material is reduced.
Other than objects, features and advantages described above, there are also other purposes, feature and excellent for the utility model
Point.Below with reference to accompanying drawings, the utility model is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.In attached drawing
In:
Fig. 1 is the structural block diagram of the sand mixer curing agent liquid material control system based on PLC of the utility model；
Fig. 2 is the electrical part of the sand mixer curing agent liquid material control system based on PLC of the preferred embodiment in the utility model
The connection schematic diagram divided.
Description of symbols:
1, touch screen；2, PLC control unit；20, power module；21, central processing module；22, On-off signal exports
Module；23, analog input and output module；3, sand temperature sensor；30, temperature conversion module；4, the first frequency converter；40, first
Catalyst pump；41, the first curing agent bucket；42, the first delivery pipe；43, the first return pipe；5, the second frequency converter；50, the second solidification
Agent pump；51, the second curing agent bucket；52, the second delivery pipe；53, the second return pipe；6, atomizer；7, stirring cage of sand mixer；8, it hands over
It changes planes.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig.1, the preferred embodiment of the utility model provides a kind of sand mixer curing agent liquid material control based on PLC
System, it is main including electric part and the liquid material being connect with electric part conveying mixing portion.Electric part mainly includes touching
Screen 1, the PLC control unit 2 that is connect with touch screen 1, the sand temperature biography for being connected to by temperature conversion module 30 PLC control unit 2
Sensor 3, the frequency converter being connect with PLC control unit 2 and the catalyst pump being correspondingly connected with frequency converter.Sand temperature sensor 3 is used
The temperature in acquisition sand hopper, and collected temperature signal is sent to PLC control unit after the conversion of temperature conversion module 30
2.PLC control unit 2 is used to receive temperature signal and be transferred to touch screen 1 and the control letter for receiving the transmission of touch screen 1
Number.Touch screen 1 is used to receive the temperature signal and real-time display temperature information and defeated for operator of the transmission of PLC control unit 2
Enter to control signal.Frequency converter is used to receive the control signal of the transmission of PLC control unit 2 and according to control signal control catalyst pump
Electric machine frequency.
The utility model is used as control core using PLC control unit 2, and touch screen 1 is used as human-computer interaction interface, to mulling
The frequency of the catalyst pump of machine carries out opened loop control, while increasing the temperature in acquisition sand hopper in real time of sand temperature sensor 3, and by temperature
Value is sent to PLC control unit 2, when staff carries out manipulation input control signal such as frequency parameter on touch screen 1,
PLC control unit 2 receives control signal and is transferred to frequency converter, realizes the frequency set-up function online to frequency converter, Jin Eryou
Frequency converter output signal to control the motor speed of catalyst pump, thus make to solidify the output flow of pump with the variation of setting value and
Variation makes the intensity of sand mold and solidification reach reasonable and stable, it can be achieved that automatically controlling in real time online, improves the accurate of control
Rate, and can guarantee the quality of shaking out under varying environment, different production objects, reduce the unnecessary waste of liquid material.
The control system of the utility model, which can be realized, manually sets frequency and automatic control frequency two ways.Manual then people
Work inputs frequency, then selects group of frequencies select button according to control dependent variable principal element automatically, secondary according to control dependent variable
Factor selection fine tuning parameter button.Control dependent variable principal element be sand mo(u)ld size and sand mo(u)ld level, control dependent variable it is secondary because
Element is the parameters of curing agent, including dihedral coefficient, igloss amount, curing agent acid content, environment temperature etc..
Further, this preferred embodiment is used for two kinds of heterogeneitys (different acidity or different solidification speed to sand mixer
Degree-speed ester) curing agent dosage realize opened loop control.PLC control unit 2 connects the first frequency converter 4 and the second frequency converter
5, the first frequency converter 4 is correspondingly connected with the first catalyst pump 40.
In the utility model, liquid material conveying mixing portion mainly forms as follows: the first solidification of the first catalyst pump 40 connection
Agent bucket 41, the first catalyst pump 40 are connected to atomizer 6 by the first delivery pipe 42.Second frequency converter 5 and the second curing agent
Pump 50 is correspondingly connected with, and the second catalyst pump 50 is connected to the second curing agent bucket 51, and the second catalyst pump 50 passes through the second delivery pipe 52
It is connected to atomizer 6.First catalyst pump 40, the second catalyst pump 50 respectively drive the solidification of the first curing agent bucket 41, second
Curing agent liquid material passes through the first delivery pipe 42 to two kinds of differences in agent bucket 51 respectively, the second delivery pipe 52 is sent to atomizer 6, and
Enter stirring cage of sand mixer 7 by atomizer 6 to be blended with roughing sand.
The control system of the utility model, according to the variation of the factor of all kinds of influence Quality of Mixing Sand, worker is on touch screen 1
Real-time adjustment is made to the frequency of frequency converter, changes the dosage of two kinds of curing agent, make the intensity of sand mold and solidification reach rationally and
Stablize, to guarantee the quality of shaking out under varying environment, different production objects, reduces the unnecessary waste of liquid material.
Further, the first return pipe 43 for being connected to the first curing agent bucket 41 is provided in the first delivery pipe 42.Second
The second return pipe 53 for being connected to the second curing agent bucket 51 is provided in delivery pipe 52.First return pipe 43 and the second return pipe 53
Extra curing agent can be flowed back in corresponding first curing agent bucket 41 and the second curing agent bucket 51, realize the reasonable benefit of liquid material
With reducing the waste of liquid material.
Further, control system further include be respectively used to control two kinds of curing agent liquid materials conveying the first solenoid valve (not
Diagram) and second solenoid valve (not shown), the first solenoid valve be set to first between atomizer 6 and the first catalyst pump 40
In delivery pipe 42, second solenoid valve is set in the second delivery pipe 52 between atomizer 6 and the second catalyst pump 50, PLC
Control unit 2 is separately connected the first solenoid valve and second solenoid valve, for controlling the power on/off of the two.
Referring to Fig. 2, sand mixer curing agent liquid material control system of the utility model based on PLC, the first frequency converter 4 and second
Frequency converter 5 is connected to general supply by breaker, by the switch of both breaker controls.PLC control unit 2 is then connected to direct current
Power supply.General supply is also connected with backup circuit breaker and socket, for Emergency use.
PLC control unit 2 is connected to interchanger 8 by Ethernet interface, and interchanger 8 is connected to touch screen 1.It can be achieved
The communication connection of PLC control unit 2 and 1 certain distance of touch screen.Specifically, touch screen 1 is mountable to the forearm of sand mixer most
Front end facilitates worker's real time inspection and setpoint frequency.And the main control cabinet for carrying PLC control unit 2 can be then placed in away from mixed
In the range of sand machine certain distance, use is more flexible.
Further, PLC control unit 2 includes power module 20, central processing module 21, On-off signal output module
22 and analog input and output module 23.The input terminal of power module 20 connects external power supply, and output end is connected to central processing
The power input of module 21, On-off signal output module 22 and analog input and output module 23.Specifically, power module 20
Connect DC supply input.Central processing module 21 respectively with On-off signal output module 22, analog input and output module 23
And touch screen 1 connects.Analog input and output module 23 is connected to the frequency converter.In the present embodiment, analog input is defeated
Module 23 is connected to the first frequency converter 4 and the second frequency converter 5 out.Central processing module 21 in PLC control unit 2 connects best friend
It changes planes 8, then touch screen 1 is connected to by interchanger 8.When worker is in 1 setpoint frequency parameter of touch screen, setting result is input to
In the corresponding registers of PLC, PLC controls analog input and output module 23 and generates not according to the frequency setting value in register
Same output quantity controls the first catalyst pump 40 and the second catalyst pump to control the first frequency converter 4 and the second frequency converter 5
50 work, to realize the function of adjusting curing agent liquid material flow according to the setpoint frequency on touch screen 1.
Further, sand temperature sensor 3 is connected to analog input and output module 23 through temperature conversion module 30.Sand temperature passes
Sensor 3 acquires temperature signal in sand hopper and sends temperature conversion module 30 to, and temperature signal is converted by temperature conversion module 30
Analog signal inputs the analog input and output module 23 in PLC control unit 2, specifically, through analog input mould therein
Block is transmitted to central processing module 21, then is transmitted to touch screen 1 through interchanger 8 and is shown.
The sand mixer curing agent liquid material control system based on PLC of the utility model, opened loop control process approximately as:
When system works, sand temperature sensor 3 measures the signal exported after sand temperature and is transmitted to PLC control unit 2 by conversion, passes through
Transmission real-time display on touch screen 1 is crossed, worker is in this, as reference, in the curing agent benchmark of different molds and different sand types
It is finely adjusted on the basis of frequency, frequency signal adjusted is transmitted to frequency converter through PLC control unit 2, to drive curing agent
Pump work, two different curing agent are delivered to atomizer 6 by pumping at this time, spray into stirring cage of sand mixer 7 via nozzle, complete solid
The control and conveying of agent liquid material.
When system works, the solenoid valve of control two class curing agent conveying is mounted between atomizer 6 and catalyst pump,
On/off electricity is controlled by PLC control unit 2.
For casting technique, the factor for influencing catalyst pump electric machine frequency mainly has two:
(1) size of mold.Mold size is divided into three classes generally according to die size:
1) it is less than 1000mm, referred to as small mould；
2) 1000mm to 2000mm, referred to as middle mould；
3) it is greater than 2000mm, referred to as big mould；
(2) sand relative position.Distance generally according to sand relative to casting is divided into three classes:
1) it is close to casting, referred to as core sand；
2) in centre, referred to as facing sand；
3) in outermost layer, referred to as floor sand；
Three or three obtain nine, under the impacts of above factors, derive nine sets of frequencies, referred to as reference frequency altogether.
Other than principal element, catalyst pump electric machine frequency can be influenced there are also some secondary causes, there is acid content, ring
Border temperature etc..These secondary causes influence smaller, it is only necessary to finely tune on the basis of reference frequency, normally be set as
0HZ.And percentage is adjusted option and can be finely adjusted in the form of percentage, is normally set as 100%.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of sand mixer curing agent liquid material control system based on PLC, which is characterized in that including touch screen (1) and the touching
It touches the PLC control unit (2) of screen (1) connection, be connected to the sand of the PLC control unit (2) by temperature conversion module (30)
Temperature sensor (3), the frequency converter being connect with the PLC control unit (2) and the curing agent being correspondingly connected with the frequency converter
Pump,
The sand temperature sensor (3) is used to acquire temperature in sand hopper, and by collected temperature signal through the temperature transition mould
The PLC control unit (2) are sent to after block (30) conversion；
The PLC control unit (2) for receive temperature signal and be transferred to the touch screen (1) and for receiving it is described
The control signal of touch screen (1) transmission；
The touch screen (1) be used for receive the PLC control unit (2) transmission temperature signal and real-time display temperature information,
And for operator's input control signal；
The frequency converter is used to receive the control signal of the PLC control unit (2) transmission and is controlled according to the control signal
The electric machine frequency of the catalyst pump.
2. the sand mixer curing agent liquid material control system according to claim 1 based on PLC, which is characterized in that the PLC
Control unit (2) connects the first frequency converter (4) and the second frequency converter (5),
First frequency converter (4) is correspondingly connected with the first catalyst pump (40), the first catalyst pump (40) connection first
Curing agent bucket (41), first catalyst pump (40) are connected to atomizer (6) by the first delivery pipe (42)；
Second frequency converter (5) is correspondingly connected with the second catalyst pump (50), the second catalyst pump (50) connection second
Curing agent bucket (51), second catalyst pump (50) are connected to atomizer (6) by the second delivery pipe (52)；
First catalyst pump (40), second catalyst pump (50) respectively drive the first curing agent bucket (41), institute
It states two kinds in the second curing agent bucket (51) different curing agent liquid materials and passes through the first delivery pipe (42), the second delivery pipe (52) respectively
It send to atomizer (6), and enters stirring cage of sand mixer (7) by the atomizer (6).
3. the sand mixer curing agent liquid material control system according to claim 2 based on PLC, which is characterized in that
The first return pipe (43) for being connected to the first curing agent bucket (41) is provided on first delivery pipe (42)；
The second return pipe (53) for being connected to the second curing agent bucket (51) is provided on second delivery pipe (52).
4. the sand mixer curing agent liquid material control system according to claim 2 based on PLC, which is characterized in that
The control system further includes the first solenoid valve and second solenoid valve for being respectively used to two kinds of curing agent liquid material conveyings of control,
First solenoid valve is set to the first delivery pipe (42) between the atomizer (6) and first catalyst pump (40)
On, the second solenoid valve is set to the second delivery pipe between the atomizer (6) and second catalyst pump (50)
(52) on,
The PLC control unit (2) is separately connected first solenoid valve and the second solenoid valve, for controlling the logical of the two
Power-off.
5. the sand mixer curing agent liquid material control system according to claim 1 based on PLC, which is characterized in that
The PLC control unit (2) is connected to interchanger (8) by Ethernet interface, and the interchanger (8) is connected to the touching
Touch screen (1).
6. the sand mixer curing agent liquid material control system according to claim 1 based on PLC, which is characterized in that
The PLC control unit (2) includes power module (20), central processing module (21), On-off signal output module
(22) and analog input and output module (23)；
The input terminal of the power module (20) connects external power supply, and output end is connected to the central processing module (21), institute
State the power input of On-off signal output module (22) and the analog input and output module (23)；
The central processing module (21) respectively with the On-off signal output module (22), the analog input and output mould
Block (23) and the touch screen (1) connection；
The analog input and output module (23) is connected to the frequency converter.
7. the sand mixer curing agent liquid material control system according to claim 6 based on PLC, which is characterized in that
The sand temperature sensor (3) is connected to the analog input and output module (23) through the temperature conversion module (30).
8. the sand mixer curing agent liquid material control system according to claim 1 based on PLC, which is characterized in that
The touch screen (1) is installed on the forearm front end of sand mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820465560.8U CN208276126U (en) | 2018-04-04 | 2018-04-04 | Sand mixer curing agent liquid material control system based on PLC |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820465560.8U CN208276126U (en) | 2018-04-04 | 2018-04-04 | Sand mixer curing agent liquid material control system based on PLC |
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| Publication Number | Publication Date |
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| CN208276126U true CN208276126U (en) | 2018-12-25 |
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ID=64750580
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| CN201820465560.8U Active CN208276126U (en) | 2018-04-04 | 2018-04-04 | Sand mixer curing agent liquid material control system based on PLC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193585A (en) * | 2019-04-25 | 2019-09-03 | 青岛双星智能铸造装备有限公司 | A kind of stepless adjustable control system of sand mixer mulling and its control method |
-
2018
- 2018-04-04 CN CN201820465560.8U patent/CN208276126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193585A (en) * | 2019-04-25 | 2019-09-03 | 青岛双星智能铸造装备有限公司 | A kind of stepless adjustable control system of sand mixer mulling and its control method |
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