CN107131118B - A kind of pressure fan group linkage mixed control method - Google Patents
A kind of pressure fan group linkage mixed control method Download PDFInfo
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- CN107131118B CN107131118B CN201710301071.9A CN201710301071A CN107131118B CN 107131118 B CN107131118 B CN 107131118B CN 201710301071 A CN201710301071 A CN 201710301071A CN 107131118 B CN107131118 B CN 107131118B
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- pressure fan
- pressure
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- water pump
- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feedback Control In General (AREA)
Abstract
A kind of pressure fan group linkage mixed control method, belongs to pressure fan control technology field;This method starts a pressure fan and water pump;Flow control valve is adjusted according to pressure air quantity and demand air quantity;According to main line pressure and set pressure control overflow valve and pressure fan;When pressure fan temperature reaches setting time greater than set temperature or timer, pressure fan is shut down, temperature minimal pressure blower starting in inactive pressure fan;Cooling line valve is controlled according to pressure fan temperature;Water pump is controlled according to pressure fan temperature increment rate;The present invention can prevent pressure fan excessively high impaired because of temperature;Each pressure fan works alternatively, and starts low temperature pressure fan, extends pressure fan service life;In running order water pump is few, reduces energy consumption, extends the water pump service life;Control efficiency is improved, equipment energy consumption is reduced.
Description
Technical field
The invention belongs to pressure fan control technology fields, and in particular to a kind of pressure fan group linkage mixed control method.
Background technique
Pressure fan is compression gas generator, to air compressed action in certain volume, so that air stores interior energy,
It can do work to other objects, realize the transfer of energy.Compressed air is safe and reliable, pollution-free, has many advantages, such as restoration, quilt
It is widely used in the links lived and produced, makes it the second largest power source of only secondary electric power.It is being pressed using electric energy
Contract intracavitary compressed air, is transformed into air internal energy, then do work to the external world, is converted to mechanical energy, it is a kind of pneumatic power source
Exchange device is filled, can be used not only as the power resources of pneumatic machinery in mine operation, and air can be supplied to working face in the pit,
Realize the compressed air self-help under hazardous condition, ensure the safety of operating personnel, be shaft production and safety guarantee important equipment it
One.
According to incompletely statistics, the enterprise of bargh of China existing 95% uses compressed air, and does not stop quantity-produced
Demand generallys use the combination configuration of multiple groups pressure fan, since plant capacity consumption is huge, so that compressed air unit electricity consumption
Increase severely, and pressure fan electricity consumption accounts for total 9% or more the electrical equipment in whole mines, compressed air is the energy more more expensive than electricity.
By taking 20 cubic metres of pressure fan as an example, the electricity charge be 0.5 yuan/degree, run 8000 hours within 1 year, the case where load factor is 60%
Under, the electricity charge of electricity consumption in 1 year are more than 40 ten thousand, and saving operation is the energy-efficient inevitable development trend of mine green;Simultaneously because pressure wind
Machine precise structure, long-time high-speed cruising are typically easy to cause abrasion and equipment failure, increase business equipment maintenance cost.At present
Non-Linear Control Theory is mainly based upon for the control method of pressure fan group linkage control, but since pressure fan group is working
There is also a large amount of continuous variables such as flow, pressure and temperature etc. in the process, have apparent hybrid characters, are typically to mix to be
System, therefore single Linear Control or nonlinear Control is unable to satisfy the control requirement of pressure fan group, therefore can be by hybrid system
Theory is applied to realize safety in production and the energy-saving run of pressure fan group in the control process of pressure fan group.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides a kind of pressure fan group linkage hybrid control system and side
Method.
Technical solution of the present invention:
A kind of pressure fan group linkage hybrid control system, comprising:
Pressure sensor, flow sensor, flow control valve and overflow valve on pressure fan group main line, setting are set
Temperature sensor, the corresponding timer of each pressure fan, at least one water pump and host computer in each pressure fan lubricating system, institute
It states each pressure fan and water pump is connected by connecting line, be respectively provided with cooling line on each pressure fan and water pump connecting line
Valve, the host computer input terminal are separately connected the pressure sensor output end, flow sensor output end, each temperature sensor
Output end, each pressure fan, each cooling line valve, each timer, each water pump, flow control valve and overflow valve.
Using the pressure fan group linkage mixed control method of pressure fan group linkage hybrid control system, include the following steps:
Step 1: one pressure fan of starting starts the pressure fan and corresponds to timer and cooling line valve, and starts a water
Pump;
Step 2: pressure sensor, flow sensor and temperature sensor distinguish real-time detection main line pressure, pressure fan
Group pressure air quantity and each pressure fan temperature, and it is sent respectively to host computer;
Step 3: comparing pressure fan group pressure air quantity and demand air quantity, if pressure air quantity is greater than demand air quantity, reduce flow control
Valve open degree processed increases flow control valve open degree if pressure air quantity is less than demand air quantity;
Step 4: comparing main line pressure and set pressure, judge whether main line pressure is less than set pressure, be, close
Overflow valve, and step 5 is executed, otherwise, overflow valve is opened, executes step 6;
Step 5: by the temperature feedback data of temperature sensor on each pressure fan, selecting in inactive pressure fan temperature most
Low pressure fan is started, and is started the pressure fan and corresponded to timer and cooling line valve, and step 3 is executed;
Step 6: when pressure fan temperature is greater than set temperature T or timer accumulated time reaches setting time t, the pressure
Fan parking selects the pressure fan that temperature is minimum in inactive pressure fan to be started, and starts pressure fan series connection timer
With cooling line valve;
Step 7: when pressure fan temperature is less than setting value, closing and the concatenated cooling line valve of the pressure fan, the setting
Value is temperature when blower is not required to continue cooling;
Step 8: pressure fan temperature increment rate is calculated, if temperature increment rate is less than minimum setting value, closes a water pump,
If temperature increment rate is not less than minimum setting value, judges whether temperature increment rate is greater than maximum set value, be, open a water
Otherwise pump executes step 3.
The utility model has the advantages that a kind of pressure fan group linkage mixed control method is compared with prior art, have the advantage that
1. carrying out real-time monitoring by temperature sensor to the operating temperature of pressure fan, preventing pressure fan excessively high because of temperature
And it is damaged;
2. limiting the stream time of each pressure fan by timer, work alternatively each pressure fan in pressure fan group,
And select the lower pressure fan of temperature to be used alternatingly with the pressure fan for obtaining halt instruction in alternation procedure, extend pressure wind
Machine service life reduces maintenance cost;
3. providing the water pump of coolant liquid to for pressure fan based on temperature sensor to the real-time monitoring of pressure fan operating temperature
Group carries out intelligent joint control, makes it under the premise of not influencing cooling effect, in running order water pump number is minimum, reaches reduction
Water pump energy consumption, extends the purpose in water pump service life;
4. controlled by the real-time detection to pressure air quantity, ductwork pressure, pressure fan runing time and temperature pump tube,
The switch of each valve in air line realizes that the linkage of pressure fan group mixes control, improves control efficiency and response time, reduction are set
Standby frequent number and equipment operation energy consumption.
Detailed description of the invention
Fig. 1 is the pressure fan group linkage hybrid control system structural schematic diagram of one embodiment of the present invention;
Fig. 2 is the pressure fan group structural schematic diagram of one embodiment of the present invention;
In figure: 1- main line;2- flow control valve;3- flow sensor;4- pressure sensor;5- overflow valve;No. 6-1 pressure
Fan outlet control valve;7-2 pressure fan discharge control valve;8-3 pressure fan discharge control valve;9-m pressure fan outlet control
Valve processed;No. 1 valve of 10- cooling line;No. 2 valves of 11- cooling line;No. 3 valves of 12- cooling line;13- cooling line n valve;
Fig. 3 is the pressure fan group linkage mixed control method flow chart of one embodiment of the present invention;
Fig. 4 is that the pressure fan group linkage of one embodiment of the present invention mixes control model schematic diagram;
Fig. 5 is the pressure fan flow control valve control model schematic diagram of one embodiment of the present invention;
Fig. 6 is that the pressure fan group linkage of one embodiment of the present invention mixes Controlling model figure.
Specific embodiment
It elaborates with reference to the accompanying drawing to one embodiment of the present invention.
As shown in Figs. 1-2, a kind of pressure fan group linkage hybrid control system, comprising:
Flow control valve 2, flow sensor 3, pressure sensor 4 and overflow valve on pressure fan group main line 1 are set
5, temperature sensor, discharge control valve 6-9, cooling line valve 10-13, each pressure fan in each pressure fan lubricating system are set
Corresponding timer, 1~n water pump and host computer, 1~m pressure fan connects 1~n water pump by connecting line, described every
Cooling line valve i.e. cooling line valve 10-13, each pressure fan and main line are respectively provided on a pressure fan and water pump connecting line
Discharge control valve is respectively provided on connecting line;The host computer input terminal is separately connected 1~m pressure fan, flow control
Valve 2,3 output end of flow sensor, 4 output end of pressure sensor, overflow valve 5, each temperature sensor output end, discharge control valve
6-9, cooling line valve 10-13, each timer and 1~n water pump.
The overflow valve is used for off-load.
Present embodiment is set as follows by taking 3 pressure fans as an example, to system:
(1) set pressure needed for pipe network can be met by setting two pressure fans of unlatching;
Initial temperature of the initial temperature of (2) No. 2 pressure fans less than No. 3 pressure fans;
(3) when each pressure fan starts, discharge control valve, cooling line valve and the timer of series connection with it are opened simultaneously
It opens, when pressure fan is closed, the discharge control valve and timer of series connection with it are closed, and cooling line valve works on until reaching
To the minimum temperature of setting.
As shown in figure 3, mix inter-linked controlling method using the pressure fan group that above-mentioned pressure fan group mixes coordinated control system,
Include the following steps:
Step 1: No. 1 pressure fan of starting, while No. 1 water pump is opened;
Step 2: pressure sensor, flow sensor and temperature sensor distinguish real-time detection main line pressure, pressure fan
Group pressure air quantity and each pressure fan temperature, and it is sent respectively to host computer;
Step 3: comparing pressure fan group pressure air quantity and demand air quantity, if pressure air quantity is greater than demand air quantity, reduce flow control
Valve open degree processed increases flow control valve open degree if pressure air quantity is less than demand air quantity;
Step 4: comparing main line pressure and set pressure, main line pressure is less than set pressure, executes step 5;
Step 5: by the temperature feedback data of temperature sensor on each pressure fan, No. 2 pressure fans being selected to open;
Step 6: when No. 1 pressure fan temperature is greater than setting maximum temperature or No. 1 pressure fan runing time greater than setting maximum
When runing time, No. 1 pressure fan is closed, while opening No. 3 pressure fans to guarantee pipe net pressure maitamce, when detecting No. 2 pressure wind
When machine temperature is greater than setting maximum temperature or No. 2 pressure fan runing times greater than maximum runing time is set, No. 2 pressure fans are closed
It closes, while opening No. 1 pressure fan to guarantee pipe net pressure maitamce, set maximum temperature when detecting that No. 3 pressure fan temperature are greater than
Or No. 3 pressure fan runing times are greater than No. 3 pressure fans when setting maximum runing time and close, while opening No. 2 pressure fans to protect
Demonstrate,prove pipe net pressure maitamce;
Step 7: when pressure fan temperature is less than setting value, closing and the concatenated cooling line valve of the pressure fan, the setting
Value is temperature when blower is not required to continue cooling;
Step 8: when detecting that temperature increment rate value is greater than the set value, No. 2 water pumps are opened, and at this moment 1, No. 2 water pump is simultaneously
Cooling work is carried out to pressure fan, when detecting that temperature increment rate value is less than setting value, to reduce running equipment, is at this moment only opened
It opens No. 1 water pump and the work that cools is implemented to pressure fan, execute step 3.
As illustrated in figures 4-5, mix control model process in conjunction with the linkage of pressure fan group and further illustrate this method, wherein q0
For system starting state, q1It is opened simultaneously for No. 1, No. 2 pressure fans, No. 3 pressure fan closed states, q2For No. 2, No. 3 pressure fans it is same
Shi Kaiqi, No. 1 pressure fan closed state, q3It is opened simultaneously for No. 1, No. 3 pressure fans, No. 3 pressure fan closed states, Q0For No. 1 water
Pump open state, Q1For No. 1, No. 2 water pumps while open state.Q2Indicate flow control valve open degree enlarging state, Q3Indicate stream
Control valve open degree reduces state, σ1Indicate that ductwork pressure is less than required set pressure or pressure air quantity is less than setting value, σ2It indicates
No. 1 pressure fan temperature is greater than setting maximum temperature or No. 1 pressure fan runing time is greater than the maximum runing time of setting, σ2Indicate 1
Number pressure fan temperature is greater than setting maximum temperature or No. 1 pressure fan runing time is greater than and sets maximum runing time, σ3Indicate No. 2
Pressure fan temperature is greater than setting maximum temperature or No. 2 pressure fan runing times are greater than the maximum runing time of setting, σ4Indicate No. 3 pressures
Blower temperature is greater than setting maximum temperature or No. 3 pressure fan runing times are greater than the maximum runing time of setting, σ4Indicate that temperature increases
Add rate to be greater than and sets maximum increment rate, σ5It indicates that temperature increment rate is less than and sets maximum increment rate, σ7Indicate that pressure air quantity is less than demand
Air quantity, σ8Indicate that pressure air quantity is greater than demand air quantity.
As shown in fig. 6, the operation that the input variable of host computer is respectively as follows: main line pressure, presses air quantity, 1-3 pressure fan
Time, the temperature of 1-3 pressure fan and temperature increment rate, they are obtained by real variable and reference variable by relational calculus
Input signal, host computer detect continuous input signal, judge the working condition of pressure fan group, are simultaneously emitted by control letter
Number, stablize system, continuously operation is gone down.
Claims (1)
- The mixed control method 1. a kind of pressure fan group links is realized using a kind of pressure fan group linkage hybrid control system, special Sign is that the pressure fan group linkage hybrid control system includes:Pressure sensor, flow sensor, flow control valve and overflow valve on pressure fan group main line, setting are set each Temperature sensor, the corresponding timer of each pressure fan, at least one water pump and host computer in pressure fan lubricating system, respectively press wind Machine connects water pump by connecting line, is respectively provided with cooling line valve, the host computer on each pressure fan and water pump connecting line Input terminal is separately connected each pressure fan, pressure sensor output end, flow sensor output end, flow control valve, overflow valve, each Temperature sensor output end, each cooling line valve, each timer and each water pump;The pressure fan group linkage mixed control method includes the following steps:Step 1: one pressure fan of starting starts the pressure fan and corresponds to timer and cooling line valve, and starts a water pump;Step 2: pressure sensor, flow sensor and temperature sensor distinguish real-time detection main line pressure, pressure fan group pressure Air quantity and each pressure fan temperature, and it is sent respectively to host computer;Step 3: comparing pressure fan group pressure air quantity and demand air quantity, if pressure air quantity is greater than demand air quantity, reduce flow control valve Open degree increases flow control valve open degree if pressure air quantity is less than demand air quantity;Step 4: comparing main line pressure and set pressure, judge whether main line pressure is less than set pressure, be, close overflow Valve, and step 5 is executed, otherwise, overflow valve is opened, executes step 6;Step 5: by the temperature feedback data of temperature sensor on each pressure fan, selecting temperature in inactive pressure fan minimum Pressure fan is started, and is started the pressure fan and corresponded to timer and cooling line valve, and step 3 is executed;Step 6: when pressure fan temperature is greater than set temperature T or timer accumulated time reaches setting time t, the pressure fan It shuts down, the pressure fan that temperature is minimum in inactive pressure fan is selected to be started, and start pressure fan series connection timer and cold But pipeline valve;Step 7: when pressure fan temperature is less than setting value, closing and the concatenated cooling line valve of the pressure fan, the setting value are Temperature when blower is not required to continue cooling;Step 8: calculating pressure fan temperature increment rate, if temperature increment rate is less than minimum setting value, a water pump is closed, if warm It spends increment rate and is not less than minimum setting value, then judge whether temperature increment rate is greater than maximum set value, be, open a water pump, Otherwise, step 3 is executed.
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CN102644585A (en) * | 2012-04-25 | 2012-08-22 | 连云港杰瑞深软科技有限公司 | Air compressor hybrid control system and method |
CN105370547A (en) * | 2014-08-28 | 2016-03-02 | 葛洲坝集团水泥有限公司 | Air compressor set with energy-saving device |
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