CN103341901B - A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method - Google Patents
A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method Download PDFInfo
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- CN103341901B CN103341901B CN201310302202.7A CN201310302202A CN103341901B CN 103341901 B CN103341901 B CN 103341901B CN 201310302202 A CN201310302202 A CN 201310302202A CN 103341901 B CN103341901 B CN 103341901B
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- 238000007731 hot pressing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002023 wood Substances 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims description 29
- 239000000498 cooling water Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 230000002463 transducing effect Effects 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 58
- 239000000446 fuel Substances 0.000 description 9
- 238000004321 preservation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The present invention relates to a kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and control method, the control device is made up of each flow control valve and delivery pump and heater control device, heat conduction oil temperature and heating platen temperature measurement control system, program timer, the control unit being separately mounted in cold and hot conduction oil, water and steam conveying pipe；Its control method is to use the COMPLEX MIXED control system for being in series and being formed by the major and minor controller in heating platen and conduction oil temperature control system and program timer, thermophore flow in each pipeline of two kinds of hot and cold thermophores of difference of conveying and heating source device are controlled, heat conduction oil temperature and hot pressing plate temperature is rapidly achieved expected requirement；Upper and lower heating platen temperature control can respective complete independently, have the characteristics that to be rapidly achieved that constant temperature, quick cooling, energy consumption be low, heating platen uniformity of temperature profile.
Description
Technical field
, can be same more particularly to a kind of man-made board hot-pressing machine the invention belongs to man-made board hot-pressing machine hot pressing temperature control field
When the conduction oil that leads in the pipeline configuration device of hot and cold conduction oil and water and steam and hot pressing plate temperature fast constant-temperaturecontrol control device
And control method.
Background technology
The hot pressing of conventional artificial's plate typically uses steam autoclave, and steam autoclave is using the saturated vapor that boiler provides as heating
Medium, water are cooling medium, and the control of its hot pressing temperature is presently mainly to be controlled using LPC, and vapor (steam) temperature fluctuation is big, and saturation
Steam increases with temperature, and pressure also and then increases, cost increase so that temperature controlled rapidity and stability difficulty adds
Greatly.And organic heat-carrying agent conduction oil has can closed state with low pressure (being usually no more than 0.8MPa) carry out liquid phase circulation and
The advantages that transmission heat, temperature in use may be up to 340 DEG C, makes its applying in wood-based plate manufacture field gradually promote.Mesh
Before, the hot-oil circulation after heating is mainly transported to heating platen and slab is entered by the application of wood-based plate hot pressing field organic heat-carrying agent
Row hot-press gluing, the control of its hot pressing temperature are mainly controlled heating source and heating equipment as steam autoclave using PLC,
But temperature change is slow, it is difficult to which realization is rapidly achieved thermostatic control.For need to stage by stage being heated, requiring heat-insulation pressure keeping temperature wave
Move small and be cooled fast to the slab heat pressing process for unloading plate after certain temperature again, and constant temperature need to be rapidly achieved and quickly cooled down and wanted
The heat pressing process asked, the temperature control equipment and control method of existing steam autoclave and heat conducting oil heating press recited above are all
Its requirement can not be met, need to separately study fast constant-temperaturecontrol control device and control method.
The content of the invention
To be suitable for thermal conductivity deep fat be main heat source it is an object of the invention to provide one kind, steam is auxiliary thermal source, water and cold
Conduction oil is cooling medium, hot and cold thermophore can simultaneously or timesharing enter heating platen man-made board hot-pressing machine fast constant temperature control
Device and control method.
The purpose of the present invention is to realize as follows：
Wood-based plate hot pressing fast constant-temperaturecontrol control device and method, it is characterized in that control device by control unit, installed in cold
It is each flow control valve and delivery pump in thermal conductivity hot oil transport pipeline system, each in water and steam conveying pipe system
Flow control valve and delivery pump composition, control unit, each flow control valve and delivery pump are all arranged on parallel with entering plate direction
The same side of hot press；Described control unit is by heater controller, platen temperature and conduction oil temperature control system, time journey
Sequence controller KC is formed, and the control valve and delivery pump that conduction oil pipeline system is related to include the control valve V of bringing-up section deep fat1
And the control valve V of hot oil pump b (2), cooling section cold oil2And cold oil pump a (1), the control valve V for being detained deep fat3, top board conduction oil
Control valve V6；Control valve and delivery pump that water and steam conveying pipe system are related to include the control valve V of cooling section cooling water4、
The control valve V of steam delivery pump c (27) and steam when cooling water exports and auxiliary heats5；Heater controller includes oil oven
Heater (4) and steam generator (26) power switch；Platen temperature and the conduction oil temperature control system is by top board temperature
Spend control system, lower platen temperature control system and conduction oil temperature control system composition；Top board temperature control system is by temperature
Spend controller TIC2, control valve V6With the temperature detection transducing unit TT2 compositions in top board；Lower platen temperature control
System is by master controller TIC, submaster controller TIC1, control valve V1, control valve V2With the temperature detection pick-up list installed in lower platen
First TT compositions, lower platen temperature control system constitute the major loop in COMPLEX MIXED control system；Conduction oil temperature control system
System is by submaster controller TIC1, control valve V1, control valve V2With the temperature detection transducing unit TT in oil-feed house steward (5)1Group
Into conduction oil temperature control system constitutes the subloop of COMPLEX MIXED control system；Master controller TIC, submaster controller TIC1
It is arranged on program timer KC in control unit (10)
Above-mentioned wood-based plate hot pressing fast constant-temperaturecontrol control device and method, it is characterized in that control method is used by time-program(me)
Controller KC pushes master controller TIC, submaster controller TIC in plate temperature and conduction oil temperature control system with composition successively1
The COMPLEX MIXED control system for the composition that is in series, to the control valve in each pipeline of two kinds of hot and cold thermophores of difference, defeated
Pump and heater is sent to be controlled；Master controller TIC output signal is as submaster controller TIC1Set-point, and submaster controller
TIC1The different range of output signal will control control valve V respectively1With control valve V2Valve opening, master controller TIC controls with secondary
Device TIC processed1Series connection, when interference effect causes oil temperature and platen temperature changes, these ripples are quickly first overcome by subloop
Reason element, is rapidly achieved the oil temperature in oil-feed house steward (5) constant, then makes pressing plate temperature by the accurate careful control of major loop progress
Degree reaches constant temperature, and major and minor loop coordination causes platen temperature to be rapidly achieved constant temperature；Into the control of top board heat conduction oil temperature
System is same first to carry out quick regulation by subloop, then is accurately controlled using PID control rule by top board temperature control system
System.
Above-mentioned wood-based plate hot pressing fast constant-temperaturecontrol control device, its control unit (10) is interior to be also equipped with corresponding data
Reason, storage, display and printing equipment, the signal of each part lead to control unit (10) by cable；Program timer
KC coordinates major loop and subloop by hot pressing process and control program requirement, will lead to respectively in the heating period of hot pressing cooling water and
The control valve V of cold conduction oil4, control valve V2Close, the control valve V of deep fat and steam will be led to respectively1, control valve V5Reach maximum,
Make deep fat and steam be transported in pressing plate duct with the flow of maximum quickly to heat pressing plate and slab, and in cooling stage
The control valve V of deep fat and steam will be led to respectively1, control valve V5Close, the control valve V of cooling water and cold oil will be led to respectively4, control
Valve V2Maximum is reached, cooling water and cold oil is transported to maximum stream flow in pressing plate duct and fast quickly cooling is carried out to pressing plate and slab
But, timing control is carried out in the heat-insulation pressure keeping stage；Deep fat and the steam circulation conveying in the different ducts of pressing plate, make monoblock pressing plate
It is heated evenly.
Using the wood-based plate hot pressing fast constant-temperaturecontrol control device and method of the present invention, upper and lower pressing plate can be rapidly heated, quickly
Reach and keep constant temperature, quick cooling, upper and lower platen temperature is evenly distributed；The control device and control method can be used for individual layer
Hot press or multi-daylight press, multi-daylight press take the temperature averages of each piece of lower platen to input letter as the temperature of major loop
Number, suitable for the hot-press gluing of thin plate and slab, heat-conducting oil heating source can be power supply or fuel gas and fuel oil；Upper and lower pressure
Plate temperature control can respective complete independently, cooling stage can quickly be cooled down or cooled down at a slow speed as needed, when cooling down at a slow speed
Cooled down with cold oil, without using water；If the heating period is heated with conduction oil and steam simultaneously, the heat time can be shortened.
Describe in detail with reference to the accompanying drawings and examples：
Brief description of the drawings
Fig. 1 single-layer hot press hot pressing constant temperature quick control device structural representations
Fig. 2 heating platen partial temperature control schematic diagrames
Three sections of decompression cooling temperature-time curves of Fig. 3 wood-based plates
Fig. 4 control program flow charts
1st, cold oil pump a 2, hot oil pump b 3, hot oil furnace 4, heater 5, oil-feed house steward 6, enter oil inlet pipe
7th, lower platen 8, lower roof plate 9, outfall sewer 10, control unit 11, oil return house steward 12, oil returning branch pipe
13rd, water inlet manifold 14, water inlet pipe 15, the top board 17 of exit branch 16, gs-oil separator
18th, expansion tube 19, expansion slot 20, overflow pipe 21, oil storage tank 22, dashpot 23, oil return pipe
24th, deep fat delivery line 25, filter 26, steam generator 27, steam delivery pump c 28, steam pipe
29th, oil inlet pipe 30, frame 31, water inlet duct 32, conduction oil duct
In Fig. 4, Y- represents "Yes", and N- represents "No".
Embodiment：
Embodiment 1
As shown in Figure 1, 2, according to the manufacture of wood-based plate hot pressing fast constant-temperaturecontrol control device, installation procedure, manufacture, install
Control device in heat transfer medium circuit pipeline system, as shown in Figure 3, to be suitable for three plates (glued board, the plane in wood-based plate
Card and medium density fibre board (MDF)) typical case three sections decompression temperature lowering curves corresponding to hot pressing exemplified by, describe above-mentioned people in detail
Make plate hot pressing fast constant-temperaturecontrol control device and control method performance；Hot pressing parameterses are set as shown in Figure 3, connect electricity
Source, upper and lower pressing plate closure；Start hot oil pump b (2), control valve V by Fig. 41With control valve V6Standard-sized sheet, heater (4) are powered, heat conduction
Oil is from oil storage tank (21) through hot oil pump b (2), hot oil furnace (3), control valve V1, oil-feed house steward (5), enter in oil inlet pipe (6) entrance,
The conduction oil duct (32) of lower platen is heated to pressing plate, after by oil returning branch pipe (12), oil return house steward (11), oil return pipe
(23), gs-oil separator (17), filter (25) enter back into deep fat stove heat and circulation conveying；When the real-time detection temperature of pressing plate
TB1Reach the setting value T of technological requirementB01When, upper and lower pressing plate is opened into slab, and closure, which continues to heat or carries out pressure-maintaining and heat-preservation, to be added
Heat, program timer KC start timing tb1=tb1+1(s)；Work as tb1=tb1+ 1=tB01Shi Baowen terminates, time-program(me) control
Device KC processed sends instruction, control valve V1Close, heater (4) power-off (or closing the fuel air valve or fuel fuel tap of heater)；
Cold oil pump a (1) is operated, control valve V2, control valve V3With control valve V4Open greatly, cold oil enters the conduction oil duct of upper and lower pressing plate
(32) upper and lower pressing plate and slab will be carried out together after the deep fat export for being trapped in the inside and into the cold water of water inlet duct (31)
Cool down for the first time；When platen temperature is reduced to TB02When, control valve V4Close, program timer KC starts timing tb2=tb2+ 1,
Hot oil pump b (2) and steam delivery pump c (27) operatings, control valve V1Open and continue to heat greatly, control valve V5Open, steam is by steam pipe
(28) enter water inlet duct (31) through water inlet manifold (13), water therein is exported, and pressing plate is heated together with deep fat；Work as tb2
=tb2+ 1=tBC2When, the pressure-maintaining and heat-preservation process of second stage terminates, control valve V1With control valve V5Close, heater (4) power-off
(or closing fuel air valve or fuel fuel tap), control valve V2, control V3With control valve V4Open greatly, cold oil and water are to pressing plate and slab
Carry out second to cool down, when temperature is reduced to TB3=TBC3When, control valve V4Close, program timer KC starts timing tb3=
tb3+ 1, hot oil pump b (2) and steam delivery pump c (27) operatings, control valve V1With control valve V5Open and continue to heat greatly, repeat second
Secondary pressure-maintaining and heat-preservation process, deep fat heat together with steam to pressing plate；Work as tb3=tb3+ 1=tBC3When, the pressure-maintaining and heat-preservation of phase III
Process terminates, control valve V1With control valve V5Close, heater (4) power-off (or closing fuel air valve or fuel fuel tap), control valve
V2, control valve V3With control valve V4Open greatly, cold oil and water carry out third time cooling to pressing plate and slab, when temperature is reduced to TB(i+1)=
T0When hot pressing terminate, upper and lower pressing plate is opened, and unloads slab；One hot press cycle terminates.
Embodiment 2
By embodiment 1, in heat-insulation pressure keeping process stages, to make the temperature of upper and lower pressing plate quickly keep constant, control valve V1
With control valve V2Aperture change by real-time detection temperature TB(i+1)Technique setting value TB0(i+1)And its excursion TB0(i+1)
±ΔTBIt is determined that Δ TBThe temperature fluctuation amplitude allowed for technique.Work as TB(i+1)＜ TB0(i+1)-ΔTBWhen, control valve V1Open big, control
Valve V processed2Turn down, continue to heat；Work as TB(i+1)＞ TB0(i+1)+ΔTBWhen, control valve V1Turn down, control valve V2Open big；Control valve V1With
Control valve V2The changing value of valve opening is the flow volume change values and real-time detection temperature T by the valveB(i+1)With setting for its technique
Definite value TB0(i+1)Difference [TB(i+1)-TB0(i+1)] change by PID rules；Top board (16) temperature control is by control valve V6Valve
Aperture change passes through control valve V6Heat transfer oil flow changing value determine, with ensure top board temperature keep constant, control valve
V5, control valve V6The changing value of valve opening and difference [TB(i+1)-TB0(i+1)] also change by PID rules；Above-mentioned i drops with decompression
The number that temperature is cooled down is corresponding, the i=0 if the 0th time cools down, the 1st cooling then i=1, the 2nd cooling then i=2, according to this
Analogize.
Claims (3)
- A kind of 1. wood-based plate hot pressing fast constant-temperaturecontrol control device, it is characterized in that control device is led by control unit, installed in cold and hot Each flow control valve and delivery pump in hot oil transport pipeline, each flow control valve in water and steam conveying pipe and Delivery pump forms, and control unit, each flow control valve and delivery pump are all installed in the same of the hot press parallel with entering plate direction Side；Described control unit is by heater controller, program timer KC, platen temperature and conduction oil temperature control system group Into control valve and delivery pump that cold and hot conduction oil pipeline system is related to include the control valve V of bringing-up section deep fat1And hot oil pump B (2), cooling section cold oil control valve V2And control valve V derived from cold oil pump a (1), delay deep fat3, top board conduction oil control Valve V processed6, control valve and delivery pump that water and steam conveying pipe system are related to include the control valve V of cooling section cooling water4, cooling The control valve V of steam delivery pump c (27) and steam when water exports and auxiliary heats5, heater controller includes oil-furnace heating Device (4) and steam generator (26) power switch；Platen temperature and the conduction oil temperature control system by top board temperature control system, lower platen temperature control system and Conduction oil temperature control system forms；Top board temperature control system is by temperature controller TIC2, control valve V6, installed in upper pressure Temperature detection transducing unit TT in plate (16)2Composition；Lower platen temperature control system is by master controller TIC, submaster controller TIC1, control valve V1, control valve V2, installed in lower platen (7) temperature detection transducing unit TT form, lower platen temperature control System constitutes the major loop in COMPLEX MIXED control system；Conduction oil temperature control system is by submaster controller TIC1, control valve V1, control valve V2, temperature detection transducing unit TT in oil-feed house steward (5)1Composition, conduction oil temperature control system structure Into the subloop of COMPLEX MIXED control system, master controller TIC, submaster controller TIC1It is arranged on program timer KC In control unit (10)；Corresponding data processing, storage, display and printing equipment are also equipped with described control unit (10), respectively Part signal leads to control unit (10) by cable.
- A kind of 2. wood-based plate hot pressing fast constant-temperaturecontrol control device according to claim 1, it is characterized in that control method uses By program timer KC successively with forming the master controller TIC pushed in plate temperature and conduction oil temperature control system, pair Controller TIC1COMPLEX MIXED control system in series, in each pipeline of two kinds of hot and cold thermophores of difference Each flow control valve, delivery pump and heater are controlled；Master controller TIC output signal is as submaster controller TIC1Give Definite value, and submaster controller TIC1The different range of output signal will control control valve V respectively1With control valve V2Valve opening, it is main Controller TIC and submaster controller TIC1Series connection, when interference effect causes oil temperature and platen temperature changes, first by subloop Quickly overcome these fluctuating factors, be rapidly achieved the oil temperature in oil-feed house steward (5) constant, then it is accurate careful by major loop progress Control, major and minor loop coordination causes top board and pushes plate temperature and be rapidly achieved constant temperature；Into top board heat conduction oil temperature The control of degree is same first to carry out quick regulation by subloop, then is accurately controlled by top board temperature control system；Time journey Sequence controller KC coordinates major loop and subloop by hot pressing process and control program requirement, will lead to respectively in the heating period of hot pressing The control valve V of cooling water and cold conduction oil4, control valve V2Close, the control valve V of deep fat and steam will be led to respectively1, control valve V5 Maximum is reached, deep fat and steam is transported to the flow of maximum in pressing plate duct and pressing plate and slab is quickly heated, and It will lead to the control valve V of deep fat and steam respectively in cooling stage1, control valve V5Close, the control of cooling water and cold oil will be led to respectively Valve V4, control valve V2Maximum is reached, cooling water and cold oil is transported to maximum stream flow in pressing plate duct to pressing plate and slab progress Quick cooling, timing control is carried out by program timer KC in the heat-insulation pressure keeping stage；Deep fat and steam can be in pressing plates not With circulation conveying in duct, it is heated evenly monoblock pressing plate.
- A kind of 3. wood-based plate hot pressing fast constant-temperaturecontrol control device according to claim 1 or 2, it is characterized in that in heat-insulation pressure keeping Process stages, to make the temperature of pressing plate quickly keep constant, control valve V1, control valve V2Valve opening change by detecting in real time Temperature TB(i+1)Setting value TB0(i+1)And its excursion TB0(i+1)±ΔTBIt is determined that Δ TBThe temperature fluctuation width allowed for technique Value, works as TB(i+1)＜ TB0(i+1)-ΔTBWhen, control valve V1Open big, control valve V2Turn down, continue to heat；Work as TB(i+1)＞ TB0(i+1)+Δ TBWhen, control valve V1Turn down, control valve V2Open big；Control valve V1, control valve V2The changing value of valve opening and real-time detection temperature TB(i+1)With setting value TB0(i+1)Difference [TB(i+1)-TB0(i+1)] change by PID rules；Above-mentioned top board (16) temperature control By control valve V6Aperture change, that is, pass through control valve V6Heat transfer oil flow change make top board temperature keep it is constant, control Valve V5, control valve V6The changing value of valve opening and difference [TB(i+1)-TB0(i+1)] also change by PID rules；Above-mentioned i and decompression The number that is cooled down of cooling is corresponding, the i=0 if the 0th cooling, the 1st cooling then i=1, cools down then i=2 the 2nd time, according to This analogizes.
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| CN201310302202.7A CN103341901B (en) | 2013-07-11 | 2013-07-11 | A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method |
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| CN201310302202.7A CN103341901B (en) | 2013-07-11 | 2013-07-11 | A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method |
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| CN108453845A (en) * | 2018-03-09 | 2018-08-28 | 苏州工业职业技术学院 | The temperature control system of man-made board hot-pressing machine |
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| CN103341901A (en) | 2013-10-09 |
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