CN202509375U - Temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment - Google Patents
Temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment Download PDFInfo
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- CN202509375U CN202509375U CN2012201067236U CN201220106723U CN202509375U CN 202509375 U CN202509375 U CN 202509375U CN 2012201067236 U CN2012201067236 U CN 2012201067236U CN 201220106723 U CN201220106723 U CN 201220106723U CN 202509375 U CN202509375 U CN 202509375U
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Abstract
The utility model discloses a temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment. The temperature control system comprises two total closed loop control networks, wherein the two total closed loop control networks respectively control a raw machine set and a regeneration machine set, each total closed loop control network respectively comprises three closed loop feedback control networks including a material temperature and firepower closed loop feedback control network, a yield and feeding quantity closed loop feedback control network and a negative pressure and air door opening degree closed loop feedback control network, the three closed loop feedback control networks respectively comprise a PLC (programmable logic controller) system and a frequency converter or a servo driver which are connected, and the frequency converter or the servo driver respectively and correspondingly controls the asynchronous motor rotating speed of a burner oil pump, the asynchronous motor rotating speed of a cold material conveying belt and the angular displacement of the servo moor driving an air door. The temperature control system has the advantages that the program of the PLC system adopts the fuzzy control theoretical basis, so a raw rolling tube and a regeneration rolling tube can respectively realize the variable-frequency control, the drying time and the material discharge quantity are regulated through regulating the rotating speed of the rolling tubes, the temperature is controlled and regulated through the linkage of the air door and the burner, and the constant proper material temperature is ensured.
Description
Technical field
The utility model relates to a kind of plantmix pitch temperature control system, particularly relates to a kind of plantmix pitch frequency conversion twin-roll equipment material temperature control system.
Background technology
The repair rate of flexible pavement improves in recent years, and the regenerate demand in secondary building of bituminous mixing plant is increased, and accomplishes the regenerate utilization rate of unit of back and reduces greatly but reprocess.
In order to address the above problem; The applicant has applied for " a kind of asphalt mixing plant with hot regeneration function ", and it comprises pitch prill system, former life system (hereinafter to be referred as primary unit), regenerating device system (hereinafter to be referred as the regeneration unit), stirring system, dust pelletizing system and the finished product bin of conventional powder system, routine.Wherein, Primary unit comprises first drying roller (hereinafter to be referred as primary cylinder) that is used for hot aggregates; This primary cylinder disposes primary burner, and the regeneration unit comprises second drying roller (hereinafter to be referred as the regeneration cylinder) that is used for hot aggregates, this regeneration cylinder configuration regenerative combustion device.
In primary pitch prill whipping process; Start primary unit and regeneration unit simultaneously; Require to measure respectively the back according to asphalt mixture gradation and primary unit and the aggregate in the regeneration unit are rendered in the agitator in the stirring system simultaneously, add certain pitch again, powder stirs into bituminous mixture through conveyor or drag conveyor.That is to say that the regeneration unit can be used for drying former raw material through designing and improving except the function of oven dry reworked material.In addition, be not referred to as cold burden before former raw material and reworked material heat, be referred to as the heat material after the heating.
Because primary cylinder needs oven-dried aggregate simultaneously with the regeneration cylinder; And the regeneration cylinder is the downflow type mode of heating; The reverse-flow efficient of the primary cylinder of its thermal efficiency ratio is low, therefore is necessary to develop a kind of material temperature control, makes primary cylinder consistent with the drop temperature of the cylinder of regenerating.
The utility model content
In view of this, the purpose of the utility model is to provide plantmix's pitch frequency conversion twin-roll equipment material temperature control system of the constant drop temperature of a kind of ability.
In order to reach above-mentioned purpose, the solution of the utility model is:
A kind of plantmix pitch frequency conversion twin-roll equipment material temperature control system comprises two total closed-loop control networks, and one of them controls primary unit, another control regeneration unit; Each total closed-loop control network comprises material temperature and firepower close-loop feedback control network respectively, output and inlet amount close-loop feedback control network, and negative pressure and throttle opening close-loop feedback control network, wherein:
This material temperature and firepower close-loop feedback control network comprise PLC system and frequency converter; This PLC system has the corresponding respectively input of setting material temperature value and actual material temperature value that receives; The output of this PLC system connects the input of frequency converter, the rotating speed of the asynchronous motor of the corresponding control of the output of this frequency converter burner oil pump;
This output and inlet amount close-loop feedback control network comprise another PLC system and another frequency converter; This another PLC system has the corresponding respectively input of setting yield values and actual production value that receives; The output of this another PLC system connects the input of another frequency converter, the rotating speed of the asynchronous machine of the corresponding control of the output of this another frequency converter cold burden conveyer belt;
This negative pressure and throttle opening close-loop feedback control network comprise a PLC system and a servo controller again; This again a PLC system have the respectively corresponding input of setting throttle opening value and actual wind pressure value that receives; This is the input of this servo controller of output connection of a PLC system again, and the corresponding control of the output of this servo controller drives the angular displacement of the servomotor of air door.
Said PLC system comprises the input module that receives setting value and value of feedback and output bias value respectively; Receive output of this input module and by the fuzzy controller of the digital value of FUZZY ALGORITHMS FOR CONTROL output controlled quentity controlled variable; And receive the output of this fuzzy controller and the output module of output simulation controlled quentity controlled variable, and the output difference correspondence of this output module connects said frequency converter.
After adopting said structure; Plantmix's pitch frequency conversion twin-roll equipment material temperature control system of the utility model has following beneficial effect: primary unit in the complete bituminous mixing plant and regenerating device group adopt a total closed-loop control network respectively; Each total closed-loop control network adopts PLC system centralized Control and Frequency Converter Control respectively; Because the program of PLC system adopts the fuzzy control theory basis, and can realize VFC to primary cylinder and regeneration cylinder respectively, with drum rotation speed adjustment drying time and load; Thereby the interlock control adjustment temperature through air door and burner guarantees constant suitable material temperature; The utility model is that the automation and the intellectuality of bituminous mixing plant provides convenience through the PLC system, makes primary cylinder consistent with the drop temperature of regeneration cylinder, thereby has realized that a kind of is basic parallel twin-roll frequency-changing control system with the fuzzy control theory; And two total closed-loop control networks also can realize complete machine control and control function separately, can be that complete bituminous mixing plant provides multiple production model according to the production needs.
Description of drawings
Fig. 1 is total closed-loop control network that plantmix's pitch frequency conversion twin-roll equipment material temperature control system of the utility model adopts;
Material temperature and firepower close-loop feedback control network that Fig. 2 adopts for the utility model;
Output and inlet amount close-loop feedback control network that Fig. 3 adopts for the utility model;
Negative pressure and throttle opening close-loop feedback control network that Fig. 4 adopts for the utility model;
The cylinder VFC sketch that Fig. 5 adopts for the utility model.
Among the figure:
Frequency converter 22 asynchronous machines 23
The specific embodiment
In order further to explain the technical scheme of the utility model, come the utility model is set forth in detail through specific embodiment below.
Plantmix's pitch frequency conversion twin-roll equipment material temperature control system of the utility model, it comprises two total closed-loop control networks that structural principle is roughly the same again, and one of them is the total closed-loop control network of primary unit, and another is the total closed-loop control network of regeneration unit.
Through material temperature, drying time and the output of the total closed-loop control network of primary unit, and realize that primary cylinder is constant with the material temperature of regeneration cylinder with primary cylinder of the corresponding respectively control of the total closed-loop control network of regeneration unit and regeneration cylinder.Be main with the total closed-loop control network of primary unit below, its structure and operating principle are described.
Fig. 1 is total closed-loop control network of primary unit; The controlled quentity controlled variable of total closed-loop control network has output, inlet amount, drum rotation speed, material temperature, firepower, negative pressure and air door, forms 3 close-loop feedback control networks by these seven variablees: 1, material temperature and firepower close-loop feedback control network; 2, output and inlet amount close-loop feedback control network; 3, negative pressure and throttle opening close-loop feedback control network; The material of the rotating speed of inlet amount and primary cylinder influence simultaneously temperature, inlet amount and firepower size influence negative pressure, and they form a total closed-loop control network each other.This control systems incorporate fuzzy control theory possesses manually and self-regulating function, and flexible operation, system is stable, security reliability is high.The manual operation fault that has solved the conventional mode of operation existence is many, and temperature fluctuation is big, influences the problem of finished product material.And full-automatic frequency conversion bowl temperature regulates, and makes each variable all participate in control, and the temperature-controlled precision of primary cylinder is improved greatly, reduced personnel's operational ton, makes more high-quality of finished product material that device fabrication comes out.
Wherein, material temperature and firepower close-loop feedback control network, output and inlet amount close-loop feedback control network, and negative pressure and throttle opening close-loop feedback control network adopt the fuzzy control structure respectively, specific as follows.
Fig. 2 is the material temperature and the firepower close-loop feedback control network of primary unit; This material temperature and firepower close-loop feedback control network comprise PLC system 11 and frequency converter 12; PLC system 11 comprises input module, fuzzy controller and output module; This input module comprises A/D conversion and the man-machine interface that is in series, and this output module adopts the D/A conversion.Preferably, A/D conversion and D/A conversion are accomplished by the A/D module and the D/A module of Siemens's series respectively.
Fuzzy controller adopts the fuzzy control new algorithm, through the computing function realization of PLC system 11.This fuzzy controller is according to the deviation e of setting value r and feedback quantity y and the rate of change C of deviation; Carry out computing by the fuzzy control new algorithm; Draw the digital value u of output controlled quentity controlled variable; Convert the specified rate of analog voltage amount U into through D/A again, regulate the rotating speed of the asynchronous motor 13 that is used for driving primary burner oil pump through frequency converter 12, and the warm Y of actual material feeds back to the A/D module as frequency converter; Finally control the size of firepower, thereby reach the constant purpose of control material temperature through control pipe outlet fuel flow.
Fig. 3 is the output and the inlet amount close-loop feedback control network of primary unit; This output and inlet amount close-loop feedback control network comprise PLC system 21 and frequency converter 22; PLC system 21 comprises input module, fuzzy controller and output module; This input module comprises A/D conversion and the man-machine interface that is in series, and this output module adopts the D/A conversion.
On man-machine interface, import the desired value of output during operation, PLC system 21 can count actual production according to the weight sampling of manufacturing process, presses fuzzy control theory; This fuzzy controller is according to setting output r and the deviation e of feedback output y and the rate of change C of deviation; Carry out computing by FUZZY ALGORITHMS FOR CONTROL, draw the digital value u of output controlled quentity controlled variable, convert the specified rate of analog voltage amount U into through D/A again as frequency converter 22; Regulate the rotating speed of the asynchronous motor 23 that is used for driving the cold burden conveyer belt through frequency converter 22; And actual production Y feeds back to the A/D module, finally reaches the conveying capacity of the primary unit cold burden of control, reaches the constant purpose of output.
Simultaneously, the variation of inlet amount and the rotating speed of cylinder can influence the material temperature to be changed, and the height of material temperature is regulated by the firepower size.The material temperature of primary like this unit and firepower have constituted a Closed Loop Fuzzy Control system.
Fig. 4 is the negative pressure and the throttle opening close-loop feedback control network of primary unit; This negative pressure and throttle opening close-loop feedback control network comprise PLC system 31 and servo controller 32; PLC system 31 comprises input module, fuzzy controller and output module; This input module comprises A/D conversion and the man-machine interface that is in series, and this output module adopts the D/A conversion.
As shown in Figure 1 again, the adjusting of the firepower of primary unit size and the size of inlet amount can cause the variation of negative pressure, and under the constant situation of output, inlet amount is constant.Under the situation of temperature constant, the firepower size is constant.Negative pressure and throttle opening size have also constituted a closed loop negative feedback system like this, control principle and process and preceding two identical.But after throttle opening reached the maximum value of setting, negative pressure still was ultralow, and at this moment throttle opening can be chain to inlet amount and firepower, improves negative pressure, reaches setting value.
In addition, the total closed-loop control network of regeneration unit also comprises 3 close-loop feedback control networks: material temperature and firepower close-loop feedback control network, output and inlet amount close-loop feedback control network, and negative pressure and throttle opening close-loop feedback control network.The concrete structure of these 3 close-loop feedback control networks and operating principle thereof, roughly the same with structure and control principle thereof shown in above-mentioned Fig. 1 to 4.
Fig. 5 be primary unit with the regeneration unit in the sketch map that is connected of frequency converter and asynchronous motor, adjust drying time and output through adjusting primary cylinder with the rotating speed of regeneration cylinder, thereby reach the constant purpose of material temperature of the primary cylinder of control and the cylinder of regenerating.
In addition; According to the unit situation in the bituminous mixing plant; Every unit is equipped with frequency converter respectively; The corresponding respectively cylinder that connects in many plantmix's asphalt equipments of the output of each frequency converter, for example with No. 1 cylinder, No. 2 cylinders or more cylinder, thereby to material temperature, drying time and the output of many units in the bituminous mixing plant respectively correspondence carry out VFC.
Plantmix's pitch frequency conversion twin-roll equipment material temperature control system of the utility model; Can realize VFC respectively through total closed-loop control network of primary unit and the total closed-loop control network of regeneration unit; And whole system is in the dynamic equilibrium; Have automatic regulatory function, cooperating reports to the police can well realize the automation and intelligent control of complete equipment with automatic processing capacity.
The product form and the style of the foregoing description and accompanying drawing and non-limiting the utility model, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.
Claims (2)
1. plantmix's pitch frequency conversion twin-roll equipment material temperature control system is characterized in that comprise two total closed-loop control networks, one of them controls primary unit, another control regeneration unit; Each total closed-loop control network comprises material temperature and firepower close-loop feedback control network respectively, output and inlet amount close-loop feedback control network, and negative pressure and throttle opening close-loop feedback control network, wherein:
This material temperature and firepower close-loop feedback control network comprise PLC system and frequency converter; This PLC system has the corresponding respectively input of setting material temperature value and actual material temperature value that receives; The output of this PLC system connects the input of frequency converter, the rotating speed of the asynchronous motor of the corresponding control of the output of this frequency converter burner oil pump;
This output and inlet amount close-loop feedback control network comprise another PLC system and another frequency converter; This another PLC system has the corresponding respectively input of setting yield values and actual production value that receives; The output of this another PLC system connects the input of another frequency converter, the rotating speed of the asynchronous machine of the corresponding control of the output of this another frequency converter cold burden conveyer belt;
This negative pressure and throttle opening close-loop feedback control network comprise a PLC system and a servo controller again; This again a PLC system have the respectively corresponding input of setting throttle opening value and actual wind pressure value that receives; This is the input of this servo controller of output connection of a PLC system again, and the corresponding control of the output of this servo controller drives the angular displacement of the servomotor of air door.
2. plantmix as claimed in claim 1 pitch frequency conversion twin-roll equipment material temperature control system; It is characterized in that: said PLC system comprises the input module that receives setting value and value of feedback and output bias value respectively; Receive output of this input module and by the fuzzy controller of the digital value of FUZZY ALGORITHMS FOR CONTROL output controlled quentity controlled variable; And receive the output of this fuzzy controller and the output module of output simulation controlled quentity controlled variable, and the output difference correspondence of this output module connects said frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201067236U CN202509375U (en) | 2012-03-20 | 2012-03-20 | Temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201067236U CN202509375U (en) | 2012-03-20 | 2012-03-20 | Temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment |
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| Publication Number | Publication Date |
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| CN202509375U true CN202509375U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201067236U Expired - Lifetime CN202509375U (en) | 2012-03-20 | 2012-03-20 | Temperature control system of plant asphalt mixing variable-frequency double rolling tube equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797272A (en) * | 2018-05-03 | 2018-11-13 | 南京同力建设集团股份有限公司 | A kind of burner and its control method of twin-roll heat regeneration asphalt concrete mixing machine |
-
2012
- 2012-03-20 CN CN2012201067236U patent/CN202509375U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797272A (en) * | 2018-05-03 | 2018-11-13 | 南京同力建设集团股份有限公司 | A kind of burner and its control method of twin-roll heat regeneration asphalt concrete mixing machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 362000 No.1 intelligent equipment Industrial Park, Luojiang District, Heshi Town, Luojiang District, Quanzhou City, Fujian Province Patentee after: Fujian tietuo Machinery Co., Ltd Address before: 362000 West Industrial Zone, Shuangyang District, Quanzhou, Fujian, Luojiang Patentee before: FUJIAN TIETUO MACHINERY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |