CN209433601U - Water tank temperature and Liquid level practical training teaching aid - Google Patents

Abstract

The utility model discloses a kind of water tank temperatures and Liquid level practical training teaching aid, including controlled device unit and control unit；Control unit includes controller, controller is connected separately with touch screen, expansion module, start button, stop button, GSS Gear Select Switch, scram button, alarm lamp, controller is connect by the first relay with inlet water solenoid valve, controller is connect by the second relay with water outlet solenoid valve, controller is connect by third relay with electric heating tube, expansion module is connect with temperature sensor, and controller is connect with third floating-ball level switch, the second floating-ball level switch and the first floating-ball level switch respectively.The utility model open-ended, not only comprising analog quantity but also include digital quantity, and can be by Integrated Teaching practical training teaching aid that whole service process dynamics are shown.

Description

Water tank temperature and Liquid level practical training teaching aid

Technical field

The utility model belongs to teaching aid technical field, and in particular to a kind of water tank temperature and Liquid level real training are taught Tool.

Background technique

With the rapid development of industry control technology, PLC technology, configuration control automatic field play come it is more important Effect, this requires designed instructional item by electrical control, PLC technology and configuration technology incorporate one, make student from Widely, the angle study and understanding industrial automation of practical application, PLC teaching are used as one industry control basic course of institution of higher education Journey also increasingly shows its importance.

Practical training teaching aid on the market is mostly to simulate controlled device with light emitting diode at present, can only carry out confirmatory examination It tests, not can be carried out the connection cut-off port encapsulation in kind of the practical controlled device in periphery；Can not visual indicator equipment dynamic operation mistake Journey；Involved practical training project is mostly digital quantity, and there are many analog quantitys in practical application.Therefore in water tank temperature In the PLC teaching of liquid level, there is an urgent need to design the realistic model of a controlled device, industry spot true reappearance makes to control Effect processed is intuitively changed.

Utility model content

The purpose of the utility model is to provide a kind of water tank temperature and Liquid level practical training teaching aid, solve existing teaching aid without The intuitive displays temperature of method, Liquid level dynamic running process the problem of.

The utility model is the technical scheme adopted is that water tank temperature and Liquid level practical training teaching aid, including controlled device Unit and control unit；Controlled device unit includes rectangular-shape, the open water tank in top, is successively pacified from top to bottom on the left of water tank Equipped with third floating-ball level switch, temperature sensor, the second floating-ball level switch and the first floating-ball level switch, on the right side of water tank from Top to bottm has been respectively communicated with stainless steel water inlet pipe and fabricating drainpipe made from stainless steel, and stainless steel water inlet pipe end is connected in turn into water electromagnetism Valve, PVC water supply hose and water tap, fabricating drainpipe made from stainless steel end are connected with water outlet solenoid valve, PVC scupper hose in turn, PVC scupper hose end is connect with catch basin 108, is connected with electric heating tube on rear side of water tank；Control unit includes controller, control Device is connected separately with touch screen, expansion module, start button, stop button, GSS Gear Select Switch, scram button, police instruction Lamp, controller are connect by the first relay with inlet water solenoid valve, and controller is connect by the second relay with water outlet solenoid valve, Controller is connect by third relay with electric heating tube, and expansion module is connect with temperature sensor, controller respectively with third Floating-ball level switch, the second floating-ball level switch and the connection of the first floating-ball level switch.

The utility model is also characterized by

Controller is siemens PLC CPU226cn DC/DC/DC PLC.

Touch screen is embedded TPC1061Ti.

Expansion module is EM231AI 2RTD.

Temperature sensor is 100 Ω Pt0.003902.

First relay, the second relay and third relay use HH54P.

Inlet water solenoid valve and water outlet solenoid valve are 24V DC electromagnetic valve.

Third floating-ball level switch, temperature sensor, the second floating-ball level switch and the first floating-ball level switch are away from water tank The height of bottom is respectively 10cm, 30cm, 40cm, 45cm.

The beneficial effect that the utility model is set is:

Solve existing teaching aid can only with light emitting diode simulate controlled device, cannot achieve visualization control, port encapsulation, A series of problems, such as lacking Analog control, is connected to each other teaching environment with industry spot, is " electric control and PLC ", " sensing Device technology ", " Programmable logic Controller (PLC) technique ", the integrated courses such as " configuration control " true teaching aid is provided；

Practical implementation problem can be introduced and be imparted knowledge to students by the device, meanwhile, which applies also for chemical industry, food The temperature and Liquid level of the fluids such as product, beverage have mode of operation optional, and the feature that temperature is adjustable is able to satisfy 0~120 DEG C The liquid level of range specification and temperature controlled needs, while the man-machine interface based on MCGS exploitation, intuitively show temperature The change procedure of liquid level realizes control integration；

Stabilization reliable for operation, temperature regulating range is wide, can not only meet the needs of Itemized teachings, and have wide city Field prospect；

Open-ended had not only included analog quantity but also had included digital quantity, and the integration that can show whole service process dynamics Practical training teaching aid is used in teaching.

Detailed description of the invention

Fig. 1 is the controlled device cellular construction schematic diagram of the utility model water tank temperature Yu Liquid level practical training teaching aid；

Fig. 2 is the control unit structural block diagram of the utility model water tank temperature Yu Liquid level practical training teaching aid；

Fig. 3 is the control unit circuit diagram of the utility model water tank temperature Yu Liquid level practical training teaching aid；

Fig. 4 is the system power supply, solenoid valve and electric heating tube of the utility model water tank temperature and Liquid level practical training teaching aid Control circuit；

Fig. 5 is the button of the utility model water tank temperature and Liquid level practical training teaching aid, hand/select gear button certainly, float The wiring diagram of ball liquid-level switch and controller；

Fig. 6 is the temperature sensor and thermal module of the utility model water tank temperature Yu Liquid level practical training teaching aid The wiring diagram of EM231AI 2RTD；

Fig. 7 is the intermediate relay, electric heating tube, solenoid valve of the utility model water tank temperature and Liquid level practical training teaching aid With the wiring diagram of controller.

In figure, 101. water tanks, 102. water taps, 103.PVC water supply hose, 104. inlet water solenoid valves, 105. is stainless Steel water inlet pipe, 106. water outlet solenoid valves, 107.PVC scupper hose；108. reservoir, 109. fabricating drainpipe made from stainless steel, 110. temperature Sensor, 111. first floating-ball level switch, 112. second floating-ball level switch, 113. third floating-ball level switch, 114. electricity Heating tube；

201. touch screens, 202. controllers, 203. expansion modules, 204. first relays, 205. second relays, 206. Third relay, 207. start buttons, 208. stop buttons, 209. hands/automatic selector switch, 210. scram buttons, 211. reports Alert indicator light.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and detailed description.

The utility model water tank temperature and Liquid level practical training teaching aid, structure such as Fig. 1-Fig. 2, including controlled device unit and Control unit；

Controlled device unit includes rectangular-shape, the open water tank 101 in top, and water tank is acrylic material, and size is 30* The cuboid of 30*50cm and top is opened wide, each wall HY-308 moment glue bond, 4 holes are opened in left side altogether.101 left side of water tank It is sequentially installed with the third floating-ball level switch 113, temperature sensor 110, middle water level detecting of high water level detection from top to bottom First floating-ball level switch 111 of the second floating-ball level switch 112 and low water level detection, 101 right side of water tank are distinguished from top to bottom It is communicated with stainless steel water inlet pipe 105 and fabricating drainpipe made from stainless steel 109, stainless steel water inlet pipe 105 is away from 101 bottom level of water tank 40cm, fabricating drainpipe made from stainless steel 109 are 10cm away from 101 bottom level of water tank.105 end of stainless steel water inlet pipe is connected in turn into water Solenoid valve 104, PVC water supply hose 103 and water tap 102, water tap 102 provide water source, stainless steel row for system 109 end of water pipe is connected with water outlet solenoid valve 106, PVC scupper hose 107,107 end of PVC scupper hose and catch basin in turn 108 connect, and the electric heating tube 114 of 220V/500W annular are connected on rear side of water tank 101, electric heating tube 114 is away from 101 bottom of water tank Height is 15cm；

Control unit includes controller 202, and control unit is independent from each other with controlled unit, and control unit is individually fixed On one piece of mesh plate.Controller 202 with touch screen 201 is connect by 485 communication cables, controller 202 and extension Module 203 is that the flat cable carried by expansion module connects.Controller 202 is connected separately with touch screen 201, expanded mode Block 203, start button 207, stop button 208, GSS Gear Select Switch 209, scram button 210, alarm lamp 211, control Device 202 is connect by the first relay 204 with inlet water solenoid valve 104, and controller 202 passes through the second relay 205 and water power out Magnet valve 106 connects, and controller 202 is connect by third relay 206 with electric heating tube 114, expansion module 203 and temperature sensing Device 110 connect, controller 202 respectively with third floating-ball level switch 113, the second floating-ball level switch 112 and the first floating ball liquid Bit switch 111 connects.

Controller 202 is siemens PLC CPU226cn DC/DC/DC PLC, is on the one hand using the model controller In order to which follow-up function extends the needs of control stepper motor；It on the other hand is that security standpoint considers, using 24V direct current supply.

Touch screen 201 is embedded TPC1061Ti.TPC1061Ti is a set of using advanced Cortex-A8CPU as core The high-performance embedded integrated touch screen of (dominant frequency 600MHz).MCGS Embedded Configuration Software (operation version) has been pre-installed, has been had Powerful image is shown and data processing function.Within the system can in the form of trend curve, data sheet Dynamically Announce Temperature, shows the course of work for exporting inlet valve, outlet valve, electric heating tube at liquid level variation in the form of animation, realizes control one Body.

Expansion module 203 be EM231AI 2RTD, EM231AI 2RTD thermal resistance input expansion module provide with it is a variety of The connector of thermal resistance selects the type of thermal resistance, the side of the mode of connection, measurement unit and open-circuit fault by DIP switch It is inputted to 2 road thermal resistances may be implemented.Main function is to cooperate the real-time detection for realizing temperature with Pt100 within the system.

Temperature sensor 110 is 100 Ω Pt0.003902, and the thermal resistance sensor and EM231 thermal resistance control module connect The mode of connecing has 2 lines, 3 lines, 3 kinds of 4 line, and latter two is primarily to eliminate measurement error caused by connecting wire, 4 line mode precision Highest can meet measurement request using 3 line modes under normal circumstances.Within the system using 3 line modes.It can pass through Thermal resistance connection type is arranged in DIP switch SW8 (OFF is 3 lines, ON is 2 lines or 4 lines).DIP switch is arranged in the system are as follows: 0010000。

First relay 204, the second relay 205 and third relay 206 use MY4NJ, the relay1 case material Environmental protection has 4 pairs of normally opened, normally-closed contacts, and power is small to be can be ignored energy saving, and shape is small, and cheap performance is stablized.? On the one hand the protective effect to PLC output terminal is played in the system, is on the other hand to realize PLC direct-flow output signal Control intermediate relay, the effect of the auxiliary contact control 220V electric heating tube of intermediate relay.

Inlet water solenoid valve 104 and water outlet solenoid valve 106 are 24V DC electromagnetic valve, which is Minitype electromagnetic valve, at present Domestic solenoid valve is using most and DC24V solenoid valve, 24VDC power supply safety, and power supply is also within the system 24VDC。

Third floating-ball level switch 113, temperature sensor 110, the second floating-ball level switch 112 and the first Floating Ball Liquid Level are opened Closing 111 height away from 101 bottom of water tank is respectively 10cm, 30cm, 40cm, 45cm.Floating-ball level switch selection 111,112,113 What is selected is the high temperature water level switch of side-mounted stainless steel floating ball, and the liquid level switch structure is simple, easy to use not need to provide Power supply, small in size, long working life, and can long-term 120 degree of heatproof, material corrosion resistance, the compression resistance of stainless steel, it is side-mounted just It is installed in water tank sidewall portion, is mounted at 10cm, 40cm, 45cm away from bottom within the system, realizes that the detection of water level is defeated The input terminal of PLC is given to switching signal out.

The utility model water tank temperature and Liquid level practical training teaching aid when work, should open the guarantor of water tap 102 first Card system is had abundant water resources.

When system electrification, water tank 101 be it is empty, water temperature is room temperature, inlet water solenoid valve 104, water outlet solenoid valve 106, electricity plus Heat pipe 114 is OFF state, the first floating-ball level switch 111, the second floating-ball level switch 112, third floating-ball level switch 113 be also OFF state, and warning note lamp 211 is also OFF state, which is system initial state.

When hand/automatic selector switch 209 of system gets to automatic running shelves, target temperature is then inputted by touch screen 201 Degree, system enter automatic running pattern.Under automatic operation mode, start button 207 is pressed, controller 202 makes the first relay It is ON that 204 coils, which obtain electric (KA1), and inlet water solenoid valve 104 obtains electric, opening YV1 water inlet, and the water level in water tank 101 gradually rises；When When the first floating-ball level switch 111 of water flooding, at this time if the water temperature in water tank 101 is lower than target temperature, controller 202 makes It is ON, the heating of 114 work once electrified of electric heating tube that 206 coil of third relay, which obtains electric (KA3),；If water temperature is more than or equal to target temperature Degree, after 206 coil of third electric appliance still in power failure state, electric heating tube 114 is not heated；With the lasting rising of water level, work as water When water level in the second floating-ball level switch 112 is flooded in position, alarm lamp 211 is lighted；Water level continues to rise, when water flooding When three 113 high water level of floating-ball level switch, it is ON that controller 202, which makes 205 coil of the second relay obtain electric (KA2), is discharged electromagnetism Valve 106 must be electric, starts to drain, the water level in water tank 101 is gradually reduced；When the water level in water tank 101 is lower than the second Floating Ball Liquid Level Water level in switch 112, alarm lamp 211 extinguish, and it is ON, water inlet electricity that controller 202, which makes 204 coil of the first relay obtain electric (KA1), Magnet valve 104 again electric opening, while making 205 coil losing electricity of the second relay (KA2) position OFF, 106 power loss of water outlet solenoid valve is closed It closes, the water level in water tank 101 is gradually increasing；If not pressing stop button 208, the just work according to this rule in cycles.

In whole service engineering, temperature sensor 110 water temperature in real-time measurement water tank 101 and passes through always EM231RTD module gives controller 202, as long as the water level in water tank 101 is higher than the first floating-ball level switch 111 and water temperature is small In target temperature, it is ON that controller 202, which will make 206 coil of third relay obtain electric (KA3), and electric heating tube 114 obtains electric heating. Meanwhile in whole service engineering, the operating status of 201 Real time dynamic display whole system of touch screen, and pass through trend curve The change curve of water temperature in draw water tank 101 passes through inlet valve, outlet valve and water in data sheet fuction output system The real time data report and historical data report of temperature.

Stop button 208 is pressed, controller 202 will make 206 coil losing electricity of third relay (KA3) be OFF, electric heating 114 power loss of pipe stops heating；First relay, 204 coil losing electricity (KA1) is OFF, and inlet water solenoid valve 104 stops water inlet；But the It is ON that two relays, 205 coil, which obtains electric (KA2), and water outlet solenoid valve 106 opens draining until water level is opened lower than the first Floating Ball Liquid Level When closing 111,205 coil ability power loss (KA2) of the second relay is OFF, and it is out of service that water outlet solenoid valve 106 just closes system.

Scram button 210 is pressed, controller 202 makes the first relay 204, the second relay 205 and third relay 206 Coil simultaneously power loss be OFF, inlet water solenoid valve 104, water outlet solenoid valve 106 close, electric heating tube 114 stop heating.

It is got to when hand/automatic selector switch 209 of system and runs shelves manually, target temperature is then inputted by touch screen, System enters manual mode of operation.

Manual work pattern presses water inlet button, 204 coil of the first relay manually and obtains electric, and inlet water solenoid valve 104 is beaten It opens, the water level in water tank 101 increases；Press manual water outlet button, 205 coil of the second relay obtains electric, and water outlet solenoid valve 106 is beaten It opens, the water in water tank 101 is discharged；When pressing manual heating button, only when the water level in water tank 101 is higher than a Floating Ball Liquid Level When switch 111, the coil of third relay 206 just it is electric, electric heating tube 114 is just started to work, and otherwise heating tube does not work.

The circuit diagram of the utility model is as shown in figure 3, controller 202 is using CPU226 and extends EM231TRD temperature mould Block, port setting are as follows: 10000001, On-off signal signal 7 in system, 1 tunnel of analog input signal, output switch parameter 4 It is a, be able to achieve automatic temperature-adjusting, water level automatic control and manually control, temperature sensor 110 be Pt100 can real-time measurement water tank Water temperature in 101 carries out the detection of water temperature, third floating-ball level switch 113, the second floating ball as the input of EM231RTD module Liquid-level switch 112 and the first floating-ball level switch 111 measure cistern water level, the digital input amount as controller 202.

Fig. 4 is the control circuit of the system power supply of the utility model, solenoid valve and electric heating tube.In solenoid valve, heating tube Control in use intermediate relay, that is, accomplished the protection to PLC terminal, and for the power supply of electric heating tube turn It changes.

Fig. 5 is the button of the utility model water tank temperature and Liquid level practical training teaching aid, hand/select gear button certainly, float The wiring diagram of ball liquid-level switch and controller.Start button 207, stop button 208,210. scram buttons select within the system It is LA16-Y-11BN, the band button of 24V, M16.And all use normally opened contact i.e. the 3 of button of button, 4 contacts The circuit diagram for seeing button in Fig. 5 is connected in the input point of PLC when button is connect with PLC, and Fig. 5 gives start button and PLC Wiring, other buttons are identical as the wiring of start button, are all the input terminals that 3,4 contacts are connected to PLC.Manual/auto conversion is opened That close 209 selections is YJ139-XB2-10X/21, and 2 grades of rotary switches use normally opened contact 3 and 4, gear within the system Select button and the connection of PLC input point are as shown in the figure.Floating-ball level switch select 111,112,113 selection be it is side-mounted not The high temperature water level switch of rust steel floating ball, liquid-level switch one end are connected with 24V power supply, and one end is connected as schemed institute with PLC input terminal Show.

Fig. 6 is the temperature sensor Pt100 and thermal module of the utility model water tank temperature Yu Liquid level practical training teaching aid The wiring diagram of EM231AI 2RTD.Within the system Pt100 have using three-wire system thermal resistance A1 in three lines such as figure, B2, C3 measure the resistance of any two lines, wherein have two groups be it is identical, one group is resistance very little, two terminals of resistance very little The channel negative terminal on module is not just connect respectively, within the system: it is 100 Ω that resistance is measured between A1, C 3, between A1, B2 Measuring resistance is 100 Ω, and resistance very little is measured between B2, C3, so, B2, C3 connect at the end A- and a- of EM231, and A1 connects The end A+ of EM231 and by conducting wire it is in parallel with the a+ terminal of EM231, as shown in the figure.Within the system, EM231AI is not used Channel B in second channel, that is, figure of 2RTD, but the signal of A channel has been parallel to channel B, this is because EM231RTD temperature There is SF LED light in degree module, which is " the line disconnection " in connection input for identification, if module has, input is not connected, So this SF lamp flashing is just shown as " line disconnection ", and display module state is " range is beyond mistake " in CPU information, So not connected channel B has been parallel on the A channel used herein, after being powered on to avoid EM231AI 2RTD module, The problem of SF lamp above it will flash, but the data of A channel are only used in programming.

Fig. 7 is the intermediate relay, electric heating tube, solenoid valve of the utility model water tank temperature and Liquid level practical training teaching aid With the wiring diagram of controller.First relay, the second relay and third relay are all made of MY4NJ, within the system a side Face plays the protective effect to PLC output terminal, is on the other hand to realize that PLC direct-flow output signal controls intermediate relay Device, the effect of the auxiliary contact control 220V electric heating tube of intermediate relay.The intermediate relay has 4 pairs of normally opened contacts, and one Coil, coil obtain electric contact movement, and the circle of relay is connected with PLC output end, and 13, the 14 of PLC output end and relay coil Terminal is connected.A pair of of normally opened contact i.e. 5 of relay, 9 and are used for the control of inlet water solenoid valve, water outlet solenoid valve 6, No. 6 terminals of 10 terminal, relay are connected with 24V positive pole, and No. 10 terminals are connected with the end solenoid valve b, and No. 5 of relay Terminal is connected with 0V, and No. 9 terminals are connected with the end solenoid valve b.A pair of relay is also used for the control of electric heating tube Normally opened contact i.e. 5,9 and 6,10 terminals, relay 5,6 terminals are connected respectively at L, N of 220V alternating current, and 9,10 terminals and electricity add The both ends of heat pipe are connected.

The teaching aid of the utility model can for " sensor technology ", " Electrical Control Technology ", " Programmable logic Controller (PLC) technique ", Integrated courses such as " configuration controls " provide true teaching aid, while being able to satisfy the temperature of the fluids such as chemical reactant, beverage The control of degree and liquid level, system have mode of operation optional, and target temperature is adjustable to obtain feature, substantially meet 0~120 DEG C of range Temperature control needs, while the man-machine interface based on MCGS exploitation, shows temperature, liquid level with the formal intuition of curve and report Dynamic changing process, have certain industrial popularization and application value.

Claims (5)

1. water tank temperature and Liquid level practical training teaching aid, which is characterized in that including controlled device unit and control unit；

The controlled device unit includes rectangular-shape, the open water tank in top (101), on the left of the water tank (101) on to Under be sequentially installed with third floating-ball level switch (113), temperature sensor (110), the second floating-ball level switch (112) and first Floating-ball level switch (111) has been respectively communicated with stainless steel water inlet pipe (105) and stainless on the right side of the water tank (101) from top to bottom Steel drainpipe (109), stainless steel water inlet pipe (105) end are connected with inlet water solenoid valve (104), PVC water supply hose in turn (103) and water tap (102), fabricating drainpipe made from stainless steel (109) end are connected with water outlet solenoid valve (106), PVC in turn Scupper hose (107), PVC scupper hose (107) end are connect with catch basin (108), connection on rear side of the water tank (101) There are electric heating tube (114)；

Described control unit includes controller (202), and the controller (202) is connected separately with touch screen (201), expansion module (203), start button (207), stop button (208), GSS Gear Select Switch (209), scram button (210), alarm lamp (211), the controller (202) is connect by the first relay (204) with inlet water solenoid valve (104), the controller (202) Connect by the second relay (205) with water outlet solenoid valve (106), the controller (202) by third relay (206) with Electric heating tube (114) connection, the expansion module (203) connect with temperature sensor (110), and the controller (202) is respectively It is connect with third floating-ball level switch (113), the second floating-ball level switch (112) and the first floating-ball level switch (111)；

The controller (202) is siemens PLC CPU226cn DC/DC/DC PLC；

The touch screen (201) is embedded TPC1061Ti；

The third floating-ball level switch (113), the second floating-ball level switch (112) and the first floating-ball level switch (111) are equal For the high temperature water level switch of side-mounted stainless steel floating ball, the third floating-ball level switch (113), temperature sensor (110), The height of two floating-ball level switch (112) and the first floating-ball level switch (111) away from water tank (101) bottom be respectively 10cm, 30cm、40cm、45cm。

2. water tank temperature according to claim 1 and Liquid level practical training teaching aid, which is characterized in that the expansion module It (203) is EM231AI2RTD.

3. water tank temperature according to claim 1 and Liquid level practical training teaching aid, which is characterized in that the temperature sensor It (110) is 100 Ω Pt0.003902.

4. water tank temperature according to claim 1 and Liquid level practical training teaching aid, which is characterized in that first relay (204), the second relay (205) and third relay (206) use HH54P.

5. water tank temperature according to claim 1 and Liquid level practical training teaching aid, which is characterized in that the inlet water solenoid valve (104) and water outlet solenoid valve (106) is 24V DC electromagnetic valve.