CN202758534U - Frequency converting control dynamic liquid level experiment equipment - Google Patents
Frequency converting control dynamic liquid level experiment equipment Download PDFInfo
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- CN202758534U CN202758534U CN 201220314738 CN201220314738U CN202758534U CN 202758534 U CN202758534 U CN 202758534U CN 201220314738 CN201220314738 CN 201220314738 CN 201220314738 U CN201220314738 U CN 201220314738U CN 202758534 U CN202758534 U CN 202758534U
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Abstract
The utility model discloses frequency converting control dynamic liquid level experiment equipment, which comprises a constant pressure water box, a constant pressure tank device, a first submersible pump, a water pressure detecting device, a PLC frequency converting control circuit, a constant temperature water box, a constant temperature tank device, a second submersible pump and a constant temperature heating device, wherein the water pressure detecting device is used for detecting the water pressure in the constant pressure tank device, the PLC frequency converting control circuit is used for controlling the first submersible pump, the constant temperature heating device is used for the constant temperature heating of water in the constant voltage water box, the first submersible pump is arranged inside the constant voltage water box, the constant pressure tank device comprises a constant pressure tank, a first water inlet pipe, a first water outlet pipe, a first water flow feedback pipe and a first water valve, the head ends of the first water inlet pipe, the first water outlet pipe, the first water flow feedback pipe and the first water valve are communicated with the constant pressure tank, the constant temperature tank device comprises a constant temperature tank, a second water inlet pipe and a second water outlet pipe, the head ends of the second water inlet pipe and the second water outlet pipe are communicated with the constant temperature tank, and the water pressure detecting device is connected with the PLC frequency converting control circuit. The frequency converting control dynamic liquid level experiment equipment has the advantages that the structure is simple, and constant temperature water supply control knowledge and constant pressure water supply control knowledge based on the PID algorithm can be effectively imparted to students.
Description
Technical field
The utility model relates to course control experiment apparatus, relates in particular to a kind of variable frequency control dynamic liquid level experimental facilities.
Background technology
At present, liquid level control, temperature control generally have been applied in the field of industrial automatic control, such as constant pressure water supply control, constant temperature water supply control etc.
Wherein, can realize that the equipment of constant pressure water supply control has generally all used the pid algorithm program, but the structure of these equipment is often very complicated.In teaching field, in order to teach the constant pressure water supply control knowledge based on pid algorithm to the student, if be used as the industry automatic control Practical training equipment with these equipment, must increase the resource configuration cost of school, training organization.
And, realize that different industry automatic control need to adopt different equipment, in order to teach the knowledge of constant temperature water supply control to the student, school, training organization also need other outfit can realize that the equipment of constant temperature water supply control makes the industry automatic control Practical training equipment, and this has just further increased the resource configuration cost of school, training organization.
The utility model content
Technical problem to be solved in the utility model provides a kind of variable frequency control dynamic liquid level experimental facilities, this experimental facilities is taught constant temperature water supply control knowledge with self simple structure to the student, and based on the constant pressure water supply of pid algorithm control knowledge, satisfied school, training organization and automatically controlled Practical training equipment with lower resource configuration cost with regard to configurable industrial and implement the user demand imparting knowledge to students, train, examine, identify.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model content is specific as follows:
A kind of variable frequency control dynamic liquid level experimental facilities, the constant temperature heating device that it comprises constant pressure water tank, constant-pressure tank device, the first submersible pump, the water pressure pick-up unit for detection of hydraulic pressure in the constant-pressure tank device, the PLC frequency conversion control circuit that is used for control the first submersible pump, constant temperature water tank, thermostatic tank device, the second submersible pump and is used for the water of constant temperature water tank inside is carried out heated at constant temperature; Described the first submersible pump is located at the inside of described constant pressure water tank; Described constant-pressure tank device comprises feeding back for the constant-pressure tank of dress water and the first water inlet pipe that head end is communicated with described constant-pressure tank, the first rising pipe and the first current manages; The end of the first water inlet pipe is communicated with described constant pressure water tank by described the first submersible pump; The end of the first current feedback pipe is communicated with described constant pressure water tank by one first water valve; It is inner that described the second submersible pump is located at described constant temperature water tank; Described thermostatic tank device comprises for the thermostatic tank of dress water and the second water inlet pipe and the second rising pipe that head end is communicated with described thermostatic tank; The end of described the second water inlet pipe is communicated with described constant temperature water tank by described the second submersible pump; Described water pressure pick-up unit is electrically connected described PLC frequency conversion control circuit.
Preferably, described constant-pressure tank device also is provided with the first stay pipe that two ends are communicated with described constant pressure water tank; Described constant-pressure tank device also be provided with three respectively with described the first water inlet pipe, two the first stay pipes the first tank body web member one to one; Each self-corresponding first tank body web member is communicated with described constant-pressure tank to the first water inlet pipe and two the first stay pipe threes' head end by it respectively.
And described the first water inlet pipe, each self-corresponding first tank body web member is supported on described constant-pressure tank in the constant pressure water tank two the first stay pipes by it respectively, thereby makes the constant-pressure tank device structurally compacter, ingenious, more attractive in appearance in appearance.
In order to keep the water level in the constant-pressure tank constant, preferably, described PLC frequency conversion control circuit comprises analog quantity acquiring device, A/D converter, PLC controller, D/A converter and frequency converter; The control end of water pressure pick-up unit, analog quantity acquiring device, A/D converter, PLC controller, D/A converter, frequency converter and the first submersible pump is electrical connected successively.
In order manually to control whether being communicated with of the first current feedback pipe and constant pressure water tank, preferably, described the first water valve is manual ball valve.
Preferably, the water pressure pick-up unit is to be located at the pressure transducer of described constant-pressure tank bottom or can to realize detecting any pick-up unit of hydraulic pressure function in the constant-pressure tank for other.
In order water excessive in the thermostatic tank to be discharged in the constant temperature water tank, preferably, thermostatic tank device of the present utility model also comprises the second current feedback pipe; The head end of described the second current feedback pipe is communicated with described thermostatic tank, and end is communicated with described constant temperature water tank by one second water valve.
Be specially, described thermostatic tank device also is provided with the second stay pipe that two ends are communicated with described constant temperature water tank; Described thermostatic tank device also be provided with three respectively with described the second water inlet pipe, two the second stay pipes the second tank body web member one to one; Each self-corresponding second tank body web member is communicated with described thermostatic tank to the second water inlet pipe and two the second stay pipe threes' head end by it respectively.
And described the second water inlet pipe, each self-corresponding second tank body web member is supported on described thermostatic tank in the constant temperature water tank two the second stay pipes by it respectively, thereby makes the thermostatic tank device structurally compacter, ingenious, more attractive in appearance in appearance.
In order manually to control whether being communicated with of the second current feedback pipe and constant temperature water tank, preferably, described the second water valve is manual ball valve.
For the water in the constant temperature water tank is carried out heated at constant temperature, preferably, described constant temperature heating device comprises well heater and the temperature sensor that AC power, controllable silicon, heating line plate, pi regulator, temp controlled meter, temperature arrange knob and be located at described constant temperature water tank inside; Described pi regulator comprises two different input ends, and described temperature sensor is electrically connected one of them input end of pi regulator by described temp controlled meter, and described temperature arranges another input end that knob directly is electrically connected pi regulator; The output terminal of pi regulator is electrically connected the silicon controlled control end; The input end of the output terminal of AC power and heating line plate is electrically connected respectively silicon controlled input end and output terminal; The output terminal of heating line plate is electrically connected described well heater.
In order to be incubated with anti-scald, preferably, it is inner that described constant temperature water tank is located at described constant pressure water tank; Described constant temperature water tank and constant pressure water tank all adopt double-layer stainless steel to be welded, and are the vacuum cavity structure between the described double-layer stainless steel.
In order to prevent have no water or little water in the thermostatic tank, preferably, described thermostatic tank device also comprises an alarm lamp; Also be provided with liquid-level floater in the described thermostatic tank; Described liquid-level floater is electrically connected described alarm lamp by a relay.
Compared with prior art, the utility model has produced following beneficial effect:
1, it is not only simple in structure for variable frequency control dynamic liquid level experimental facilities of the present utility model, and can effectively teach constant temperature water supply control knowledge to the student, and based on the constant pressure water supply of pid algorithm control knowledge, satisfied school, training organization and automatically controlled Practical training equipment with lower resource configuration cost with regard to configurable industrial and implement the user demand imparting knowledge to students, train, examine, identify.
2, constant temperature water tank is located at constant pressure water tank inside, and constant temperature water tank and all adopt double-layer stainless steel to be welded, it is the vacuum cavity structure between the double-layer stainless steel, can effectively be incubated the water in the constant temperature water tank, also prevent simultaneously because of the too high user of scald of the water temperature in the constant temperature water tank.
3, liquid-level floater and alarm lamp are set, can be in time to User Alarms in the situation of have no water or little water in the thermostatic tank, reminding user checks the thermostatic tank device.
Description of drawings
The utility model will be further described below in conjunction with the drawings and specific embodiments:
Fig. 1 is the more preferably structural representation of embodiment of variable frequency control dynamic liquid level experimental facilities of the present utility model;
Fig. 2 is the structural representation of another direction of Fig. 1;
Fig. 3 is constant-pressure tank device part-structure schematic diagram of the present utility model;
Fig. 4 is thermostatic tank device part-structure schematic diagram of the present utility model
Wherein, 11, constant pressure water tank; 12, the first submersible pump; 13, constant-pressure tank; 14, the first water inlet pipe; 15, the first current feedback pipe; 16, the first water valve; 17, the first stay pipe; 18, the first tank body web member; 21, constant temperature water tank; 211, well heater; 212, temperature sensor; 22, the second submersible pump; 23, thermostatic tank; 24, the second water inlet pipe; 25, the second current feedback pipe; 26, the second water valve; 27, the second stay pipe; 28, the second tank body web member; 3, water pressure pick-up unit.
Embodiment
As shown in Figures 1 to 4, variable frequency control dynamic liquid level experimental facilities of the present utility model, the constant temperature heating device that it comprises constant pressure water tank 11, constant-pressure tank device, the first submersible pump 12, the water pressure pick-up unit 3 for detection of hydraulic pressure in the constant-pressure tank device, the PLC frequency conversion control circuit (not shown) that is used for control the first submersible pump 12, constant temperature water tank 21, thermostatic tank device, the second submersible pump 22 and is used for the water of constant temperature water tank 21 inside is carried out heated at constant temperature; Described the first submersible pump 12 is located at the inside of described constant pressure water tank 11; Described constant-pressure tank device comprises feeding back for the constant-pressure tank 13 of dress water and the first water inlet pipe 14 that head end is communicated with described constant-pressure tank 13, the first rising pipe (not shown) and the first current manages 15; The end of the first water inlet pipe 14 is communicated with described constant pressure water tank 11 by described the first submersible pump 12; The end of the first current feedback pipe 15 is communicated with described constant pressure water tank 11 by one first water valve 16; Described the second submersible pump 22 is located at described constant temperature water tank 21 inside; Described thermostatic tank device comprises for the thermostatic tank 23 of dress water and the second water inlet pipe 24 and the second rising pipe (not shown) that head end is communicated with described thermostatic tank 23; The end of described the second water inlet pipe 24 is communicated with described constant temperature water tank 21 by described the second submersible pump 22; Described water pressure pick-up unit 3 is electrically connected described PLC frequency conversion control circuit.
Need to prove, described PLC frequency conversion control circuit is the PLC frequency conversion control circuit that has used the pid algorithm program.
Particularly, described constant-pressure tank device also is provided with the first stay pipe 17 that two ends are communicated with described constant pressure water tank 11; Described constant-pressure tank device also be provided with three respectively with described the first water inlet pipe 14, two the first stay pipes 17 the first tank body web member 18 one to one; Each self-corresponding first tank body web member 18 is communicated with described constant-pressure tank 13 to the first water inlet pipe 14 and two the first stay pipe 17 threes' head end by it respectively.
And, described the first water inlet pipe 14, each self-corresponding first tank body web member 18 is supported on described constant-pressure tank 13 in the constant pressure water tank 11 two the first stay pipes 17 by it respectively, thereby make the constant-pressure tank device structurally compacter, ingenious, more attractive in appearance in appearance.
In order to keep the water level in the constant-pressure tank 13 constant, particularly, described PLC frequency conversion control circuit comprises analog quantity acquiring device (not shown), A/D converter (not shown), PLC controller (not shown), D/A converter (not shown) and frequency converter (not shown); The control end of water pressure pick-up unit 3, analog quantity acquiring device, A/D converter, PLC controller, D/A converter, frequency converter and the first submersible pump is electrical connected successively.
Need to prove, described PLC controller is built-in with the pid algorithm program.
In order manually to control whether being communicated with of the first current feedback pipe 15 and constant pressure water tank 11, particularly, described the first water valve 16 is manual ball valve.
Particularly, water pressure pick-up unit 3 is for to be located at the pressure transducer of described constant-pressure tank 13 bottoms or can to realize detecting any pick-up unit of constant-pressure tank 13 interior hydraulic pressure functions for other.
For thermostatic tank 23 interior excessive water being discharged in the constant temperature water tank 21, particularly, thermostatic tank device of the present utility model also comprises the second current feedback pipe 25; The head end of described the second current feedback pipe 25 is communicated with described thermostatic tank 23, and is terminal by the described constant temperature water tank 21 of one second water valve, 26 connections.
Be specially, described thermostatic tank device also is provided with the second stay pipe 27 that two ends are communicated with described constant temperature water tank 21; Described thermostatic tank device also be provided with three respectively with described the second water inlet pipe 24, two the second stay pipes 27 the second tank body web member 28 one to one; Each self-corresponding second tank body web member 28 is communicated with described thermostatic tank 23 to the second water inlet pipe 24 and two the second stay pipe 27 threes' head end by it respectively.
And, described the second water inlet pipe 24, each self-corresponding second tank body web member 28 is supported on described thermostatic tank 23 in the constant temperature water tank 21 two the second stay pipes 27 by it respectively, thereby make the thermostatic tank device structurally compacter, ingenious, more attractive in appearance in appearance.
In order manually to control whether being communicated with of the second current feedback pipe 25 and constant temperature water tank 21, particularly, described the second water valve 26 is manual ball valve.
For the water in the constant temperature water tank 21 is carried out heated at constant temperature, particularly, described constant temperature heating device comprises well heater 211 and the temperature sensor 212 that AC power (not shown), controllable silicon (not shown), heating line plate (not shown), pi regulator (not shown), temp controlled meter (not shown), temperature arrange the knob (not shown) and be located at described constant temperature water tank 21 inside; Described pi regulator comprises two different input ends, and described temperature sensor 212 is electrically connected one of them input end of pi regulator by described temp controlled meter, and described temperature arranges another input end that knob directly is electrically connected pi regulator; The output terminal of pi regulator is electrically connected the silicon controlled control end; The input end of the output terminal of AC power and heating line plate is electrically connected respectively silicon controlled input end and output terminal; The output terminal of heating line plate is electrically connected described well heater 211.
In order to be incubated with anti-scald, particularly, described constant temperature water tank 21 is located at described constant pressure water tank 11 inside; Described constant temperature water tank 21 all adopts double-layer stainless steel to be welded with constant pressure water tank 11, and is the vacuum cavity structure between the described double-layer stainless steel.
In order to prevent thermostatic tank 23 interior have no water or little waters, particularly, described thermostatic tank device also comprises an alarm lamp (not shown); Also be provided with the liquid-level floater (not shown) in the described thermostatic tank 23; Described liquid-level floater is electrically connected described alarm lamp by a relay (not shown).
Need to prove, described well heater 211 can be realized any well heater of heating wire identical function for heating wire or other.
Constant pressure water supply control procedure of the present utility model is specific as follows:
Fill water in constant-pressure tank 13, because the volume of constant-pressure tank 13 is invariable, floorage also is invariable, so the size of constant-pressure tank 13 interior hydraulic pressure is directly proportional with the height of water level.In the PLC of PLC frequency conversion control circuit controller, preset a force value (being preset value); Then the PLC frequency conversion control circuit receives the current hydraulic pressure value (being the analog detection value) that pressure transducer collects by its analog quantity acquiring device; Then, utilize A/D converter to convert this analog detection value to the Digital Detecting value, and then send this Digital Detecting value to the PLC controller; It is received the Digital Detecting value with the PLC controller and preset value compares, and calculates digital deflection between Digital Detecting value and the preset value by pid algorithm; Then convert this digital deflection to deviation of simulation by D/A converter, again this deviation of simulation is outputed on the frequency converter, control the working condition that frequency converter removes to control the first submersible pump 12 by this deviation of simulation, be specially: when the Digital Detecting value greater than preset value (be the current water level of constant-pressure tank the inside too high cause current hydraulic pressure value greater than the PLC controller in predefined force value) time, variable frequency control through the PLC frequency conversion control circuit, the first submersible pump 12 is under the effect of frequency converter, slowed down its pump water frequency or directly stop pump water, then open the first water valve 16, the water that constant-pressure tank 13 the insides are excessive is discharged in the constant pressure water tank 11 by the first current feedback pipe 15, until the water level of constant-pressure tank 13 the insides makes the Digital Detecting value equal preset value, thereby the water level that guarantees constant-pressure tank 13 the insides is a steady state value, realizes constant pressure water supply.Vice versa.
Constant temperature water supply control procedure of the present utility model is specific as follows:
Need to prove, described thermostatic tank 23 and constant-pressure tank 13 are the hollow cylinder tank body, it can also directly adopt light blue, translucent, resistant to elevated temperatures organic glass disposal molding, so the user can easily observe the liquid level situation in thermostatic tank 23 and the constant-pressure tank 13 outside.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection domain of the utility model claim all.
Claims (10)
1. a variable frequency control dynamic liquid level experimental facilities is characterized in that: the constant temperature heating device that it comprises constant pressure water tank, constant-pressure tank device, the first submersible pump, the water pressure pick-up unit for detection of hydraulic pressure in the constant-pressure tank device, the PLC frequency conversion control circuit that is used for control the first submersible pump, constant temperature water tank, thermostatic tank device, the second submersible pump and is used for the water of constant temperature water tank inside is carried out heated at constant temperature; Described the first submersible pump is located at the inside of described constant pressure water tank; Described constant-pressure tank device comprises feeding back for the constant-pressure tank of dress water and the first water inlet pipe that head end is communicated with described constant-pressure tank, the first rising pipe and the first current manages; The end of the first water inlet pipe is communicated with described constant pressure water tank by described the first submersible pump; The end of the first current feedback pipe is communicated with described constant pressure water tank by one first water valve; It is inner that described the second submersible pump is located at described constant temperature water tank; Described thermostatic tank device comprises for the thermostatic tank of dress water and the second water inlet pipe and the second rising pipe that head end is communicated with described thermostatic tank; The end of described the second water inlet pipe is communicated with described constant temperature water tank by described the second submersible pump; Described water pressure pick-up unit is electrically connected described PLC frequency conversion control circuit.
2. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1, it is characterized in that: described constant-pressure tank device also is provided with the first stay pipe that two ends are communicated with described constant pressure water tank; Described constant-pressure tank device also be provided with three respectively with described the first water inlet pipe, two the first stay pipes the first tank body web member one to one; Each self-corresponding first tank body web member is communicated with described constant-pressure tank to the first water inlet pipe and two the first stay pipe threes' head end by it respectively.
3. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1, it is characterized in that: described PLC frequency conversion control circuit comprises analog quantity acquiring device, A/D converter, PLC controller, D/A converter and frequency converter; The control end of water pressure pick-up unit, analog quantity acquiring device, A/D converter, PLC controller, D/A converter, frequency converter and the first submersible pump is electrical connected successively.
4. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1, it is characterized in that: described the first water valve is manual ball valve.
5. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1 is characterized in that: the water pressure pick-up unit is the pressure transducer of being located at described constant-pressure tank bottom.
6. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1 is characterized in that: described thermostatic tank device also comprises the second current feedback pipe; The head end of described the second current feedback pipe is communicated with described thermostatic tank, and end is communicated with described constant temperature water tank by one second water valve.
7. variable frequency control dynamic liquid level experimental facilities as claimed in claim 6, it is characterized in that: described the second water valve is manual ball valve.
8. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1, it is characterized in that: described constant temperature heating device comprises well heater and the temperature sensor that AC power, controllable silicon, heating line plate, pi regulator, temp controlled meter, temperature arrange knob and be located at described constant temperature water tank inside; Described pi regulator comprises two different input ends, and described temperature sensor is electrically connected one of them input end of pi regulator by described temp controlled meter, and described temperature arranges another input end that knob directly is electrically connected pi regulator; The output terminal of pi regulator is electrically connected the silicon controlled control end; The input end of the output terminal of AC power and heating line plate is electrically connected respectively silicon controlled input end and output terminal; The output terminal of heating line plate is electrically connected described well heater.
9. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1 is characterized in that: it is inner that described constant temperature water tank is located at described constant pressure water tank; Described constant temperature water tank and constant pressure water tank all adopt double-layer stainless steel to be welded, and are the vacuum cavity structure between the described double-layer stainless steel.
10. variable frequency control dynamic liquid level experimental facilities as claimed in claim 1, it is characterized in that: described thermostatic tank device also comprises an alarm lamp; Also be provided with liquid-level floater in the described thermostatic tank; Described liquid-level floater is electrically connected described alarm lamp by a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314738 CN202758534U (en) | 2012-06-29 | 2012-06-29 | Frequency converting control dynamic liquid level experiment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314738 CN202758534U (en) | 2012-06-29 | 2012-06-29 | Frequency converting control dynamic liquid level experiment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN202758534U true CN202758534U (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220314738 Expired - Fee Related CN202758534U (en) | 2012-06-29 | 2012-06-29 | Frequency converting control dynamic liquid level experiment equipment |
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| CN (1) | CN202758534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596277A (en) * | 2019-01-17 | 2019-04-09 | 上海出入境检验检疫局工业品与原材料检测技术中心 | A kind of system for packing container constant temperature air seal test |
-
2012
- 2012-06-29 CN CN 201220314738 patent/CN202758534U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596277A (en) * | 2019-01-17 | 2019-04-09 | 上海出入境检验检疫局工业品与原材料检测技术中心 | A kind of system for packing container constant temperature air seal test |
| CN109596277B (en) * | 2019-01-17 | 2023-12-15 | 上海海关工业品与原材料检测技术中心 | System for be used for packaging container constant temperature airtight test |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20140629 |
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| EXPY | Termination of patent right or utility model |