CN102889684A - Control device for vacuum heating furnace - Google Patents
Control device for vacuum heating furnace Download PDFInfo
- Publication number
- CN102889684A CN102889684A CN2012103316488A CN201210331648A CN102889684A CN 102889684 A CN102889684 A CN 102889684A CN 2012103316488 A CN2012103316488 A CN 2012103316488A CN 201210331648 A CN201210331648 A CN 201210331648A CN 102889684 A CN102889684 A CN 102889684A
- Authority
- CN
- China
- Prior art keywords
- amount
- control module
- temperature
- value
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a control device for a vacuum heating furnace. The control device comprises a parameter acquiring module, an analog input module, a master control module and a combustor running control module, wherein the parameter acquiring module is used for acquiring running state parameters of the vacuum heating furnace and outputting the parameters to the analog input module; the analog input module is used for converting inputted analog into digital and outputting the digital to the master control module; and the master control module is used for controlling the combustor running control module to realize control functions such as control mode selection, misfiring reason judgment and flexible proportional control according to the inputted digital and inputted control commands. The control device meets demands of users on control functions of the vacuum heating furnace, and has a wide market prospect.
Description
Technical field
The present invention relates to a kind of vacuum furnace control device, belong to vacuum furnace control technology field.
Background technology
Vacuum furnace (being called again the phase transformation efficient heating stove) is a kind of emerging phase change heating furnace, its principle is at subnormal ambient of the inner formation of the body of heater of sealing, utilize water low-boiling characteristic in the low pressure situation, the heating agent (water or superconducting fluid) of loading in the body of heater that Fast Heating is sealed, make the heating agent explosive evaporation go out high-temperature steam, the heated medium of water recovery in heat exchanger tube heating heat exchanger tube reaches the purpose of heating.
Present existing vacuum furnace comprises that generally automatic control start and stop, large and small fire were regulated at that time automatically, the control functions such as long-range demonstration of 24 hours continuous Real Time Monitorings, alarm and defencive function and operational factors.But along with the application of vacuum furnace is more and more extensive, existing control technology can not satisfy user's demand for control, the control function that specifically can't be achieved as follows:
Control model is selected: the different regions user is different to the requirement at the control point of vacuum furnace, for example requires to regulate, require to control or require with the pressure of steam in the stove to control with vapor (steam) temperature in the stove with start and stop and large and small fire that the media outlet temperature of master pipe is controlled heating furnace; For polydisc pipe heating furnace, if fixing certain parameter of usefulness is controlled heating furnace, because coil pipe multi-state excursion is large, the relatively poor problem of heating furnace adaptability can appear all.
Judge the reason that misfires: the automaticity of vacuum furnace is higher; the user is general only can be operated by simple start and stop; for troubleshooting and judgement is lacked experience and instrument; will cause burner not start in case break down; and operating personnel's failure judgement intuitively, thereby cause fault to solve.
Soft ratio is regulated: burner generally all is two sections ignition combustors.Be operated under two sections ignition combustor default conditions under the little fiery state, simultaneously it provides a big fire switch, and the big fire switch burner that closes when little fire does not satisfy needs will operate in big fire state.When if vacuum furnace needs burner to operate in the centre position of big fire and little fire, two sections frequently start and stop of ignition combustor.
Summary of the invention
Control model is selected, the reason that misfires is judged, the problem of soft ratio adjusting in order to solve can't realizing of existing in the existing vacuum furnace control technology in the present invention, and then a kind of vacuum furnace control device is provided.For this reason, the invention provides following technical scheme:
The vacuum furnace control device comprises: parameter acquisition module, analog input module, main control module and burner operation control module;
Described parameter acquisition module comprises for the temperature simulation amount that gathers steam in the stove and exports to the temperature transmitter of described analog input module, the pressure transmitter that is used for gathering the pressure simulation amount of steam in the stove and exports to described analog input module, the fluid level transmitter that is used for gathering the liquid level analog quantity of water level in the stove and exports to described analog input module, be used for to gather the concentration of analog amount of fuel gas in the stove and export to the combustable gas concentration transmitter of described analog input module and be used for the outlet temperature analog quantity of pickup coil outlet temperature and export to the outlet temperature transmitter of described analog input module;
Described analog input module is used for temperature simulation amount, pressure simulation amount, liquid level analog quantity, concentration of analog amount, the outlet temperature analog quantity of input are converted to respectively temperature digital amount, pressure on the number amount, liquid level digital quantity, concentration digital quantity, outlet temperature digital quantity and export to described main control module;
Described main control module is used for calculating saturated vapor pressure value in the acquisition stove according to described temperature digital amount, and by relatively obtaining level of vacuum in the stove with described pressure on the number amount; Be used for through first scheduled time set temperature value and described temperature digital amount being compared, if the value of described temperature digital amount is higher than described set temperature value, then send to described burner operation control module the big fire change-over switch was closed for second scheduled time and the control signal of the 3rd scheduled time of delaying time, if the value of described temperature digital amount is lower than described set temperature value, then sends to described burner operation control module little fiery change-over switch was closed for second scheduled time and the control signal of the 3rd scheduled time of delaying time; Be used for the value of the value of the value of the value of described temperature digital amount, pressure on the number amount, liquid level digital quantity and concentration digital quantity respectively with threshold, if at least one in described temperature digital amount, pressure on the number amount, liquid level digital quantity and the concentration digital quantity surpasses threshold value, then output display; Be used for any one signal regulated to signal and the large and small fire of the start and stop of described burner operation control module transmission control combustion device according to described temperature digital amount, pressure on the number amount or outlet temperature digital quantity;
Described burner operation control module is used for the start and stop according to the signal controlling burner of described control combustion device start and stop, and the large and small fire of the signal controlling burner of regulating according to control combustion device large and small fire is regulated.
Vacuum furnace control device provided by the invention can be realized the functions such as the control model selection, the reason that misfires judgement, soft ratio adjusting to vacuum furnace, has satisfied the demand of user to vacuum furnace control function, has wide market prospects.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the vacuum furnace control device that provides of the specific embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
This specific embodiment provides a kind of vacuum furnace control device, as shown in Figure 1, comprising: parameter acquisition module 1, analog input module 2, main control module 3 and burner operation control module 4;
The start and stop that burner operation control module 4 is used for according to the signal controlling burner of control combustion device start and stop, and according to the rich few strange large and small fire adjusting of the signal controlling of control combustion device large and small fire adjusting.
Concrete, main control module 3 can adopt the PLC of Siemens S7-200 series, and analog input module 2 can adopt the analog input module of EM231 series.Because the signal of burner is 220V AC type, thus be provided with relay between the digital input and output channel of burner signal and PLC, to realize the translation function of varying level signal.User's setting value of input can adopt the touch-screen input.
The operation principle of the vacuum furnace that this specific embodiment provides is: EM231 receives the 4-20mA current signal that field instrument transmits, and to convert analog signals to corresponding scope be that the digital quantity signal of 4096-32767 inputs to PLC; PLC actual value corresponding to digital quantity signal converts to again according to the range of each instrument, and the user's setting value that then actual value and touch-screen is transmitted is made comparisons, and judges the control instruction that next will export to burner according to the difference of comparison; The instruction of PLC output all is the 24V direct current signal, and the burner end all is the 220V AC signal, so need to carry out the signal conversion through the relay of 24V DC coil; In order to monitor the running status of burner, burner is sent into the running status of oneself in the control device in the mode of 220V switching value signal simultaneously, and the relay of process 220V AC coil is the digital quantity input channel that 24V DC sends into PLC afterwards with level conversion; Just can know the correlation behavior of burner in the address that touch-screen calls respective channel; For example the burner ignition signal has been through having entered the I0.4 passage after the relay conversion, and the position state indication of calling the I0.4 address at touch-screen so just can be known whether burner is put and catches fire.
Each function of the vacuum furnace that this specific embodiment is provided below in conjunction with Figure of description elaborates.
(1) soft ratio is regulated
(2) reason that misfires is judged
The concrete operations of the reason that misfires decision-making function are that the state that has influence on each factor of burner startup in the Vacuum Furnace Control System is all judged, be specially: main control module 3 with the value of the value of the value of the value of temperature digital amount, pressure on the number amount, liquid level digital quantity and concentration digital quantity respectively with threshold, if at least one in temperature digital amount, pressure on the number amount, liquid level digital quantity and the concentration digital quantity surpasses threshold value, output display then, the method that shows can show green indicating lamp for the item that is no more than threshold value, and the item that surpasses threshold value shows red led.
(3) control model is selected
The principle that control model is selected is to make three to select branch respectively corresponding three kinds of control models in the control program of main control module 3.The selection button that three control models are arranged at touch-screen, the user presses the control model of wanting to switch and selects after the button, program can cut out the pattern that enters into user's appointment automatically from control model before, and this function is to switch under the state of not blowing out, do not delay production.Make setting value under each control model and the comparison program of actual value in the PLC program, come into force simultaneously in order to prevent any time lower control model more than 2, before judging, an interlocking is arranged.The specific operation process that control model is selected is: main control module 3 is according to any one signal regulated to signal and the large and small fire of the 4 transmission control combustion device start and stop of burner operation control module in temperature digital amount, pressure on the number amount or the outlet temperature digital quantity.
(4) one keys are done vacuum
Vacuum furnace when normal operation furnace inner environment should be: do not contain on-condensible gas (mainly being air), body of heater pressure is negative pressure, this environment mainly relies on manually and realizes, specific practice is to allow burner burn make the interior steam pressure of stove surpass the opening pressure value of 50KPa(body of heater top one-way relief valves always), could allow steam back down one-way relief valves on the body of heater (being also referred to as vacuum controller) air is discharged with steam.Afterwards burn-out device and the production procedure of opening coil pipe of discharging regular hour (about 10 minutes), the interior steam of stove because being pulled away, heat is liquefied, thereby the hurried decline of furnace pressure causes one-way relief valves to be closed like this, forms subnormal ambient in the stove, and this process just is called as does vacuum.At present because vacuum drying oven is all supporting switch board arranged, switch board has protection to vapor (steam) temperature in water level, the stove in the pressure of steam in the stove, the stove, particularly temperature alarming and pressure alarm, can at pressure rise burn-out device before the 50KPa, so need to do at present vacuum two schemes be arranged: the one, near the valve closing presure sensor, the temperature sensor base makes system not trigger this two warnings; Another then is to juggle things at burner, and with the start and stop line short circuit of burner, the burner control meeting that just broken away from control system is burnt always like this.All there is certain danger in these two kinds of ways: the former scalds operating personnel easily, and the latter occurs electricly to hurt sb.'s feelings and dryout a pot phenomenon easily.
Therefore optional; the vacuum furnace that this specific embodiment provides can also realize that a key does vacuum function; corresponding technical scheme is: add a kind of vacuum mode of doing in the control program of main control module 3; main control module 3 is adjusted into 100KPa according to the control command closing temperature protection of input and with the threshold value of pressure protect under this pattern; when surpassing threshold value at least one in liquid level digital quantity, concentration digital quantity and the pressure on the number amount, close burner.Vacuum drying oven just can burn more than the 50KPa always like this, but normally blowing out when the generation liquid level is hanged down with gas leakage alarm.Touch-screen can display system run on normal mode during normal operation, in case the user presses " key is done vacuum buttons ", system can enter to be done vacuum mode and inform the user with indicator lamp, literal simultaneously, and auditory tone cues is arranged.Because the evacuation time of doing in the vacuum process needs operating personnel to determine at the scene, so can literal and auditory tone cues be arranged at touch-screen, inform that operating personnel note checking on-the-spot exhaust situation.
(5) blowout protection
Vacuum furnace also following situation can occur: main control module 3 provides firing command but the normal flame-out and program controller in service of burner does not send any warning, and this phenomenon is referred to as to stop steathily.Stop steathily to cause the various pipelines of oil recovery factory not heat and freeze.For this phenomenon, each oil recovery factory all is provided with the system of vacuum drying oven once being patrolled and examined every 2 hours at present, but this system not only expends more manpower, and reliability and security are not high.
Therefore optional, the vacuum furnace that this specific embodiment provides can also be realized extinguish protection function.Utilize this function, the user can obtain message timely when occuring to stop steathily, solves the current combustion device and need to stop steathily just detectable problem of manual inspection.Concrete technical scheme is: at first burner operation control module 4 is used for putting the signal that catches fire to main control module 3 transmissions when detecting flame, and sending alarm signals according to the burner running status to main control module 3, alarm signal comprises low tension switch alarm signal, leak detector alarm signal or program controller alarm signal; If main control module 3 is used for not receiving catch fire signal and do not receive the alarm signal that described burner operation control module sends of point that burner operation control module 4 sends through the 4th scheduled time (about 3 minutes), judge that then burner is flame-out, this moment triggers buzzer and alarm lamp notifies the user to process.
The technical scheme that adopts this specific embodiment to provide; can realize the control model selection of vacuum furnace, the reason that misfires judgement, the adjusting of soft ratio, a key are done vacuum; the functions such as blowout protection; satisfy the demand of user to vacuum furnace control function, had wide market prospects.
The above; only be the better specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (3)
1. the vacuum furnace control device is characterized in that, comprising: parameter acquisition module, analog input module, main control module and burner operation control module;
Described parameter acquisition module comprises for the temperature simulation amount that gathers steam in the stove and exports to the temperature transmitter of described analog input module, the pressure transmitter that is used for gathering the pressure simulation amount of steam in the stove and exports to described analog input module, the fluid level transmitter that is used for gathering the liquid level analog quantity of water level in the stove and exports to described analog input module, be used for to gather the concentration of analog amount of fuel gas in the stove and export to the combustable gas concentration transmitter of described analog input module and be used for the outlet temperature analog quantity of pickup coil outlet temperature and export to the outlet temperature transmitter of described analog input module;
Described analog input module is used for temperature simulation amount, pressure simulation amount, liquid level analog quantity, concentration of analog amount, the outlet temperature analog quantity of input are converted to respectively temperature digital amount, pressure on the number amount, liquid level digital quantity, concentration digital quantity, outlet temperature digital quantity and export to described main control module;
Described main control module is used for calculating saturated vapor pressure value in the acquisition stove according to described temperature digital amount, and by relatively obtaining level of vacuum in the stove with described pressure on the number amount; Be used for through first scheduled time set temperature value and described temperature digital amount being compared, if the value of described temperature digital amount is higher than described set temperature value, then send to described burner operation control module the big fire change-over switch was closed for second scheduled time and the control signal of the 3rd scheduled time of delaying time, if the value of described temperature digital amount is lower than described set temperature value, then sends to described burner operation control module little fiery change-over switch was closed for second scheduled time and the control signal of the 3rd scheduled time of delaying time; Be used for the value of the value of the value of the value of described temperature digital amount, pressure on the number amount, liquid level digital quantity and concentration digital quantity respectively with threshold, if at least one in described temperature digital amount, pressure on the number amount, liquid level digital quantity and the concentration digital quantity surpasses threshold value, then output display; Be used for any one signal regulated to signal and the large and small fire of the start and stop of described burner operation control module transmission control combustion device according to described temperature digital amount, pressure on the number amount or outlet temperature digital quantity;
Described burner operation control module is used for the start and stop according to the signal controlling burner of described control combustion device start and stop, and regulates according to the rich few strange large and small fire of signal controlling that control combustion device large and small fire is regulated.
2. vacuum furnace control device according to claim 1; it is characterized in that; described main control module also is used for being adjusted into 100KPa according to the control command closing temperature protection of input and with the threshold value of pressure protect; when surpassing threshold value at least one in described liquid level digital quantity, concentration digital quantity and the pressure on the number amount, close burner.
3. vacuum furnace control device according to claim 1, it is characterized in that, described burner operation control module also is used for putting the signal that catches fire to described main control module transmission when detecting flame, and sending alarm signal according to the burner running status to described main control module, described alarm signal comprises low tension switch alarm signal, leak detector alarm signal or program controller alarm signal;
If described main control module also is used for not receiving catch fire signal and do not receive the alarm signal that described burner operation control module sends of point that described burner operation control module sends through the 4th scheduled time, judge that then burner is flame-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210331648.8A CN102889684B (en) | 2012-09-07 | 2012-09-07 | Control device for vacuum heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210331648.8A CN102889684B (en) | 2012-09-07 | 2012-09-07 | Control device for vacuum heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102889684A true CN102889684A (en) | 2013-01-23 |
| CN102889684B CN102889684B (en) | 2014-07-02 |
Family
ID=47533281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210331648.8A Active CN102889684B (en) | 2012-09-07 | 2012-09-07 | Control device for vacuum heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889684B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045112A1 (en) * | 2014-09-28 | 2016-03-31 | 万盛(中国)科技有限公司 | Gas controller for fire source simulation and control method |
| CN109612266A (en) * | 2018-12-28 | 2019-04-12 | 株洲晨昕中高频设备有限公司 | A kind of vacuum furnace automatic control system |
| CN110319711A (en) * | 2019-07-10 | 2019-10-11 | 二重（德阳）重型装备有限公司 | Gas furnace method for controlling furnace temperature based on on/off control system |
| CN111121087A (en) * | 2018-11-01 | 2020-05-08 | 云南航天工业有限公司 | Novel intelligent combustion controller based on CAN bus and control method thereof |
| CN111443157A (en) * | 2020-03-16 | 2020-07-24 | 京威汽车设备有限公司 | Heater combustion test system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58182391A (en) * | 1982-04-19 | 1983-10-25 | Matsushita Electric Ind Co Ltd | Remote control device |
| CN2767903Y (en) * | 2005-01-31 | 2006-03-29 | 河南德润锅炉有限公司 | Automatic control apparatus for vacuum boiler |
| CN2919027Y (en) * | 2006-06-28 | 2007-07-04 | 何俊南 | Pressure controlled vacuum hot-water boiler |
| CN201166460Y (en) * | 2008-01-13 | 2008-12-17 | 高树峰 | Instantaneously-heated type full-automatic hot water apparatus |
-
2012
- 2012-09-07 CN CN201210331648.8A patent/CN102889684B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58182391A (en) * | 1982-04-19 | 1983-10-25 | Matsushita Electric Ind Co Ltd | Remote control device |
| CN2767903Y (en) * | 2005-01-31 | 2006-03-29 | 河南德润锅炉有限公司 | Automatic control apparatus for vacuum boiler |
| CN2919027Y (en) * | 2006-06-28 | 2007-07-04 | 何俊南 | Pressure controlled vacuum hot-water boiler |
| CN201166460Y (en) * | 2008-01-13 | 2008-12-17 | 高树峰 | Instantaneously-heated type full-automatic hot water apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 徐明强: "真空炉温度控制系统的研制", 《西安石油大学学报(自然科学版)》, vol. 07, no. 02, 30 June 1992 (1992-06-30), pages 62 - 65 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045112A1 (en) * | 2014-09-28 | 2016-03-31 | 万盛(中国)科技有限公司 | Gas controller for fire source simulation and control method |
| CN111121087A (en) * | 2018-11-01 | 2020-05-08 | 云南航天工业有限公司 | Novel intelligent combustion controller based on CAN bus and control method thereof |
| CN111121087B (en) * | 2018-11-01 | 2024-04-30 | 云南航天工业有限公司 | Novel intelligent combustion controller based on CAN bus and control method thereof |
| CN109612266A (en) * | 2018-12-28 | 2019-04-12 | 株洲晨昕中高频设备有限公司 | A kind of vacuum furnace automatic control system |
| CN110319711A (en) * | 2019-07-10 | 2019-10-11 | 二重（德阳）重型装备有限公司 | Gas furnace method for controlling furnace temperature based on on/off control system |
| CN110319711B (en) * | 2019-07-10 | 2020-06-16 | 二重（德阳）重型装备有限公司 | Gas furnace temperature control method based on switching value control system |
| CN111443157A (en) * | 2020-03-16 | 2020-07-24 | 京威汽车设备有限公司 | Heater combustion test system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102889684B (en) | 2014-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102889684B (en) | Control device for vacuum heating furnace | |
| CN102519041B (en) | A kind of numerical control gas burner | |
| CN202209705U (en) | Intelligent gas cooker control system | |
| CN204438219U (en) | Safe and intelligent gas-cooker system | |
| CN202024361U (en) | Ignition controller capable of monitoring automatically | |
| CN207622068U (en) | A kind of boiler safety automatic ignition device | |
| CN102563695A (en) | Automatic monitoring ignition controller | |
| CN112634589A (en) | Household gas intelligent integrated system of anti-leakage and anti-explosion timing switch | |
| CN102563880B (en) | Multi-fuel combustion device and method | |
| CN201672513U (en) | Explosion-proof gas burner | |
| CN104006384A (en) | Numerical control fuel oil combustion machine and self-inspection method thereof | |
| CN103115379B (en) | Controlling system of steam injection boiler gas leakage and boiler safe operation | |
| CN210375549U (en) | Plug-in steam pipeline valve internal leakage detection display instrument | |
| US11573008B2 (en) | Method for detecting anomalies associated with a gas appliance | |
| CN203177205U (en) | Control system of gas leakage of steam-injection boiler and safe operations of boiler | |
| CN101907303B (en) | Control method of flame indication module of cookers | |
| CN217603875U (en) | Flameout interlocking control circuit and flameout interlocking electric control valve | |
| CN201106931Y (en) | Boiler flameout alarming control device | |
| CN207005723U (en) | Natural gas leakproof automatic control system | |
| CN113467385A (en) | Dynamic automatic control system of industrial wireless oil field wellhead heating furnace | |
| CN201368457Y (en) | Combined-type combustor | |
| CN201170609Y (en) | Numerical control gas stove controller | |
| CN110486950A (en) | A kind of electric-heating control system and method | |
| CN203425436U (en) | Fire-fighting operation control device | |
| CN205065802U (en) | Heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |