CN2435710Y - Temp. field changeable tube electric resistance furnace - Google Patents
Temp. field changeable tube electric resistance furnace Download PDFInfo
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- CN2435710Y CN2435710Y CN 00243211 CN00243211U CN2435710Y CN 2435710 Y CN2435710 Y CN 2435710Y CN 00243211 CN00243211 CN 00243211 CN 00243211 U CN00243211 U CN 00243211U CN 2435710 Y CN2435710 Y CN 2435710Y
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- furnace
- thermocouple
- temperature
- stove silk
- heat
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Abstract
The utility model relates to a temperature field changeable tube type resistance furnace which comprises a furnace body and an electric control part, wherein the outermost layer of the furnace body is a metal furnace shell. The outer side of a center furnace tube is wound with furnace wires; a thermocouple is arranged in a wall; protective tiles are used for protecting the furnace wires and fixing the thermocouple, and then heat-insulating material is filled. The electric control part comprises a computer control unit composed of a microprocessor, a memory, an interface, a display, etc., a detection unit composed of the thermocouple, an amplifier and an analog-to-digital converter, and a performance unit composed of a solid state relay and a power supply. The overall design process of the resistance furnace is controlled by a computer. The utility model is suitable for a plurality of temperature fields such as isothermal temperature fields, gradient temperature fields, zone melting temperature fields, etc., and has multiple purposes of crystal growth, smelting, etc.
Description
The utility model belongs to heating equipment, relates to electric current and flows through heating, utilizes the tube type resistance furnace of the heat heated parts of its generation.
Present tube type resistance furnace both domestic and external is all done heater element with high-resistance electrothermic alloy, adopts temperature to indicate adjusting apparatus and controllable silicon electric supply installation automatically, by regulating thyristor operating angle to control its output voltage, keeps rated output power.And the process of its intensification and cooling controlled.Yet this tube type resistance furnace is used for, and alloy smelting, physics are measured, galvanic couple is proofreaied and correct and during heat treatment, and because of its control accuracy is not high, temperature changes simple and is not suitable for.
The purpose of this utility model provides a kind of overall process computer control, the variation of multizone temperature, big capacity, multiduty tube type resistance furnace.Be applicable to that crystal growth, alloy smelting, physics are measured, galvanic couple is proofreaied and correct and the heat treatment multiple use.
But the utility model alternating temperature field tube type resistance furnace comprises body of heater and electrical control part, wherein the main member of body of heater comprise boiler tube, stove silk, thermocouple, protect watt, heat-insulation layer and furnace shell.Boiler tube is made with high-temperature ceramic materials, and there are screw thread and aperture in the surface, and stove silk grouping is wrapped on the screw thread, and the thermocouple that is used for measuring temperature is contained in aperture.Protecting watt is ceramic, covers outside boiler tube, is used to protect stove silk and fixing galvanic couple.Furnace shell is the outermost layer of body of heater.Protect watt and furnace shell between the filling insulation material use heat-insulation layer as, in order better to prevent heat radiation, the special heat shielding cover that in heat-insulation layer, installs additional.
The utility model electrical control part comprises the computer control unit that is made of ancillary equipment such as microprocessor, memory, interface, displays; By the thermocouple in the described body of heater, the detecting unit that links in proper order and constitute with amplifier, analog-digital converter; And comprise the performance element that constitutes by solid-state relay array and power supply; The stove silk of respectively organizing in the described body of heater connects with power supply by solid-state relay respectively.
Make the refractory ceramics of boiler tube and can select aluminium oxide or zirconia for use.The stove silk is selected for use according to different heating-up temperatures, as Aludirome, platinum-rhodium alloy etc.Corresponding thermocouple is also like this, can use chromel-alumel, or the platinum Pt Rh.Insulation material is selected alumina silicate fibre blanket, Zirconium oxide fibre blanket or mullite cotton etc. for use.Furnace shell can be made with aluminium alloy or steel.But the design's alternating temperature field tube type resistance furnace can satisfy different operating temperature requirements, and maximum operating temperature can reach 1700K.
Fig. 1 the utility model boiler tube and protect the tile structure schematic diagram
Fig. 2 the utility model furnace binding schematic diagram
The overall pie graph of Fig. 3 the utility model tube type resistance furnace
Fig. 4 the utility model detects and the control section schematic diagram
Fig. 5 the utility model temperature control process workflow journey figure
To the detailed description of illustrated embodiment in conjunction with the accompanying drawings, will make content of the present utility model and characteristics more clear.
At first see also Fig. 1 to Fig. 3.But the utility model alternating temperature field tube type resistance furnace comprises body of heater 100 and electric control system 200.As shown in Figure 1, boiler tube 110 is main bodys of body of heater 100, makes with aluminium oxide or zirconia high-temperature ceramic materials, the outer surface of boiler tube 110 has fine thread 112, with aperture 113, stove silk 120 is twined in grouping in the screw thread, and thermocouple (unmarked among Fig. 1) is installed in the aperture 113.According to different temperature needs, stove silk 120 adopts different materials such as Aludirome, platinum-rhodium alloy.Also according to different power requirements, the number of turns that 120 coilings of stove silk are different and different group numbers.It also is ceramic protecting watts 140, covers outside boiler tube 110, is used to protect stove silk and stationary heat galvanic couple.
Referring to Fig. 2, the outermost layer of body of heater 100 is furnace shells 160 of metal, adopts aluminium alloy to make.Insulation material 150, adopt alumina silicate fibre blanket, Zirconium oxide fibre blanket or mullite cotton etc. swathe boiler tube 110, protect watts 140 and furnace shell 160 between.Simultaneously in heat-insulation layer, install the heat shielding cover additional, its objective is to prevent heat radiation.Stove silk 120 and thermocouple 130 are drawn by stove wire connection 121 and thermocouple junction 131 respectively.
Among the utility model embodiment, as shown in Figure 3, comprise tubular electric resistance furnace body 100, electric control system 200.Wherein, electric control system 200 comprises the detecting unit 300 that is linked by thermocouple 130 (Fig. 2), amplifier 310, analog converter 320 orders, the computer control unit 400 that constitutes by microprocessor 410, memory 420, interface 430, and comprise the performance element 500 that constitutes by solid-state relay 510, power supply 530.Thermocouple measurement gained thermocouple signal in the body of heater 100 is sent into detecting unit 300, through amplifier 310 signal is amplified, and converts data signal to through analog-digital converter 320 again and sends into computer control unit 400.In computer control unit 400, little processing 410 and memory 420 will carry out analytical calculation from the detection signal of detecting unit 300, and determine next work order constantly, send control signal through interface 430 then and send into performance element 500.The control signal instruction that solid-state relay array 510 in the performance element 500 and power supply 530 send according to computer control unit 400 by cycle conducting heating, realizes the control to various not equalities of temperature field to each group stove silk.
The utility model shown in Figure 4 detects and an example of computer control unit is described as follows.Thermocouple 131 in the detecting unit and ambient temperature measurement signal 133 are admitted to 16 road analog multichannel switches 132, latch its address so that choose corresponding analog channel with latch 432, wherein temperature sensor 133 is converted to corresponding current signal with absolute temperature, is connected in series a resistance (R) 135 and just can obtains voltage signal.Two- stage calculation amplifier 311 and 313 are sent in the output of analog multichannel switch 132, signal after it amplifies 700 times is delivered to 12 moduluses (AD) converter 320, the heat time heating time of respectively organizing the stove silk is accordingly read and calculated to microprocessor (CPU) 410 with the digital quantity of conversion, and the conducting of stove silk heating current is controlled by i.e. 434 and 436 the output of another group of latch with shutoff.One level translator 451 adopts 82C50 to be used for serial communication, and experimental data is spread out of, and thereafter, another level translator 453 usefulness ICL232 (or MAX232) are converted to interface (adopting RS232) level with Transistor-Transistor Logic level.Another group latch i.e. 431 and 433 addresses that are used for latched memory, one group of SRAM (RAM) 421 and 423 is used for storage of variables, 422 and 424 for can to rewrite programmable read only memory EPROM be program storage, and 426 and 428 are used to store experimental data for electrically rewritable programmable read-only memory EEPROM.In addition, " house dog " 415 MAX690 are used for monitoring the duty of CPU, in case the program appearance is unusual, just with cpu reset.
In the utility model design, the software of computer control part mainly is the control program by assembler language and C language hybrid programming, its working method for temperature the situation in the tube type resistance furnace of testing circuit collection is analyzed, calculating and sending goes out work order, boiler tube is heated according to instruction conducting solid-state relay by performance element again, to realize control, on display, show the variation of temperature field simultaneously in real time to the temperature field.
The utility model tube type resistance furnace temperature control process workflow journey shown in Figure 5 is described as follows.After tube type resistance furnace is started working, calculating the Temperature Distribution of heating cycle according to equality of temperature field not (comprise isothermal temperature, the molten temperature in gradient Wen Changhe district etc.) and technological requirement sets value, order detecting unit and temperature sensor that the Temperature Distribution in the boiler tube is sampled simultaneously, again sampled value and setting value are compared, the numerical value PID technology of being correlated with by the multiple spot neighbourhood, calculate heating cycle, each each solid-state relay conducting and ON time length at interval whether is constantly organized stove silk and is heated each in the decision performance element.After calculating the setting value of next temperature field distribution heating cycle simultaneously, again the Temperature Distribution of boiler tube is sampled, compare sampled value and setting value again, repeat above process, realize the control that furnace is distributed.
But alternating temperature field tube type resistance furnace and temperature control method that the utility model provides can be realized isothermal temperature field and gradient temperature field, also can realize distinguishing molten temperature field; All programme-control but the spatial distribution of temperature field and time distribute; Higher temperature-controlled precision is arranged, and precision reaches ± 1K, satisfies multiple material preparation requirements such as crystal growth, alloy smelting, and multiple uses such as physics mensuration, galvanic couple correction and heat treatment.
Claims (3)
1. but an alternating temperature field tube type resistance furnace comprises body of heater and electric control system, it is characterized in that the main member of body of heater comprises boiler tube, stove silk, thermocouple, protects watt, heat-insulation layer and furnace shell; Boiler tube is made with high-temperature ceramic materials; There are screw thread and aperture in the surface, and stove silk grouping is wrapped on the screw thread, and the thermocouple that is used for measuring temperature is contained in aperture; Protecting watt is ceramic, covers outside boiler tube, is used to protect stove silk and stationary heat galvanic couple, and furnace shell is the outermost layer of body of heater, protect watt and furnace shell between the filling insulation material use heat-insulation layer as, install the heat shielding cover in the heat-insulation layer additional;
Electric control system comprises the computer control unit that is made of ancillary equipment such as microprocessor, memory, interface, displays; The detecting unit that links in proper order and constitute by the thermocouple in the described body of heater, amplifier, analog-digital converter; And comprising the performance element that constitutes by solid-state relay array and power supply, the stove silk of respectively organizing in the described body of heater connects with power supply by solid-state relay respectively.
2. but according to the described alternating temperature of claim 1 field tube type resistance furnace, it is characterized in that in its detection and the computer control unit, thermocouple and ambient temperature measurement signal are admitted to 16 road analog multichannel switches, with its address of latches so that choose corresponding analog channel, wherein temperature sensor is converted to corresponding current signal with absolute temperature, is connected in series a resistance and just can obtains voltage signal; Two-stage calculation amplifier is sent in the output of analog multichannel switch, signal after it amplifies is delivered to 12 analog-digital converters, the heat time heating time of respectively organizing the stove silk is accordingly read and calculated to microprocessor with the digital quantity of conversion, and the conducting of stove silk heating current is controlled by the output of another group of latch with shutoff; One level translator is used for serial communication experimental data is spread out of, and another level translator is converted to interface level with Transistor-Transistor Logic level; Another group latch is used for the address of latched memory, and one group of SRAM is used for storage of variables; Also having the batch processing memory is the electrically rewritable programmable read-only memory EEPROM that can rewrite programmable read-only memory EPROM and one group of storage experimental data, and " house dog " that is used to monitor the microprocessor work state.
3. but according to the described alternating temperature of claim 1 field tube type resistance furnace, it is characterized in that the refractory ceramics of making boiler tube selects aluminium oxide or zirconia for use, the stove silk is selected Aludirome or platinum-rhodium alloy for use, thermocouple is selected chromel-alumel or platinum Pt Rh for use, insulation material is selected alumina silicate fibre blanket, Zirconium oxide fibre blanket or mullite cotton for use, and furnace shell is made with aluminium alloy or steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00243211 CN2435710Y (en) | 2000-07-05 | 2000-07-05 | Temp. field changeable tube electric resistance furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00243211 CN2435710Y (en) | 2000-07-05 | 2000-07-05 | Temp. field changeable tube electric resistance furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2435710Y true CN2435710Y (en) | 2001-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00243211 Expired - Fee Related CN2435710Y (en) | 2000-07-05 | 2000-07-05 | Temp. field changeable tube electric resistance furnace |
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| CN (1) | CN2435710Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871728A (en) * | 2010-06-30 | 2010-10-27 | 姜堰市科苑电子仪器有限公司 | Splitting decomposition electric furnace special for ultraluminescence sulphur determination device |
| CN112146440A (en) * | 2020-09-29 | 2020-12-29 | 北京康斯特仪表科技股份有限公司 | High temperature furnace capable of reconfiguring temperature zone and method for reconfiguring temperature zone |
| CN112176398A (en) * | 2020-10-22 | 2021-01-05 | 云南鑫耀半导体材料有限公司 | Single crystal furnace structure for growing single crystal by VGF method and temperature control method |
-
2000
- 2000-07-05 CN CN 00243211 patent/CN2435710Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871728A (en) * | 2010-06-30 | 2010-10-27 | 姜堰市科苑电子仪器有限公司 | Splitting decomposition electric furnace special for ultraluminescence sulphur determination device |
| CN112146440A (en) * | 2020-09-29 | 2020-12-29 | 北京康斯特仪表科技股份有限公司 | High temperature furnace capable of reconfiguring temperature zone and method for reconfiguring temperature zone |
| CN112176398A (en) * | 2020-10-22 | 2021-01-05 | 云南鑫耀半导体材料有限公司 | Single crystal furnace structure for growing single crystal by VGF method and temperature control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |