CN106643193A - Temperature control system of electric smelting furnace - Google Patents
Temperature control system of electric smelting furnace Download PDFInfo
- Publication number
- CN106643193A CN106643193A CN201611153260.8A CN201611153260A CN106643193A CN 106643193 A CN106643193 A CN 106643193A CN 201611153260 A CN201611153260 A CN 201611153260A CN 106643193 A CN106643193 A CN 106643193A
- Authority
- CN
- China
- Prior art keywords
- solid
- state relay
- door switch
- heater strip
- switch
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0084—Controlling closure systems, e.g. doors
Abstract
The invention discloses a temperature control system of an electric smelting furnace. The temperature control system comprises a furnace door switch, a solid-state relay, heating wires and a thermoelectric couple. A static contact of the furnace door switch is connected with one input control end of the solid-state relay, and a movable contact of the furnace door switch is connected with the other input control end of the solid-state relay. The movable contact and the static contact of the furnace door switch are connected when a furnace door is closed and disconnected when the furnace door is opened. One output end of the solid-state relay is connected with a mains supply, and the other output end of the solid-state relay is connected with the heating wires. A temperature detection unit of the thermoelectric couple detects the temperature of a heating unit where the heating wires are located, and the output end of the thermoelectric couple is connected with a main control module of the electric smelting furnace. Through circuit improvement, the mechanical heating furnace door switch which originally needs to be replaced every one to two months can operate stably for a long time, cost is reduced, and the working stability of the system is improved.
Description
Technical field
The invention belongs to examine assay device control field, it is related to a kind of temperature control system of electric melting furnace.
Background technology
Traditional electricity melting furnace is to control temperature program(me) by microcomputer system, completes to heat and lower the temperature, passes in and out sample, sample rolling
The operations such as dynamic stirring.Machinery heating door switch is that the maximum node of stove heat device electric current is melted in electric smelting, is also the part of most critical, is
Upper lower heater is controlled respectively by two groups of contacts.Its part includes movable contact, stationary contact, compression spring, antagonistic spring.
Mechanical heater switch is frequently switched on causes contact to be struck sparks heat ageing, ablation, and easy loose contact, adhesion cause heater to lose
Control, causes accessory to damage or electric melting furnace is scrapped.
The content of the invention
It is an object of the invention to provide furnace temperature control system is melted in a kind of electric smelting, efficiently solving electric smelting, to melt furnace temperature out of control
Phenomenon.
For achieving the above object, the present invention adopts following technical proposals：
Furnace temperature control system, including stove door switch, solid-state relay, heater strip, thermocouple are melted in a kind of electric smelting, and fire door is opened
The stationary contact of pass is connected with solid-state relay input control end, and the movable contact of stove door switch is another with solid-state relay
Individual input control end connection, stove door switch movable contact is closed when fire door is closed with stationary contact, disconnected in oven door opening, solid-state
One output end of relay is connected with mains supply, and another output end of solid-state relay is connected with heater strip, thermocouple
The temperature detecting unit detection heating unit temperature that is located at of heater strip, the master control mould of the output end of thermocouple and electric melting furnace
Block connects.
Further, the heating unit of electric melting furnace includes upper strata heater strip and lower floor's heater strip, the temperature inspection of thermocouple
The mold temperature that unit detection is located between upper strata heater strip and lower floor's heater strip is surveyed, stove door switch includes that the first machinery heating is opened
Pass and the second mechanical heater switch, solid-state relay includes the first solid-state relay and the second solid-state relay, and the first machinery adds
The movable contact and stationary contact of thermal switch is connected respectively with the input of the first solid-state relay, the output end of the first solid-state relay
It is connected with upper strata heater strip；The movable contact and stationary contact of the second mechanical heater switch respectively with the input of the second solid-state relay
Connection, the output end of the second solid-state relay is connected with lower floor heater strip.
The invention has the beneficial effects as follows,
The present invention is heated the machinery being connected with electrical heating wire originally by carrying out track remodelling to original electric melting furnace
Stove door switch is changed to mechanical heating furnace door switch control rule solid-state relay, and solid-state relay controls the heating action of electrical heating wire,
In circuit after improvement, mechanical heating furnace door switch flows only through tens milliamperes of small current, it is to avoid original mechanical heating furnace door
Contact struck sparks heat ageing, ablation that what switch directly constituted that loop flows through that high current causes with heating wire cause, easily contact is not
Good, adhesion.Originally in circuit, mechanical heating furnace door switch breaks down, and the main control module of electric melting furnace is detected without electric current
Flow through, work can be automatically stopped, in holding state.Solid-state relay is electronic switch, lossless with fast, noiselessness is reacted
The advantage of consumption, improves through circuit, needs one or two month to be accomplished by the mechanical heating furnace door switch changed when can be long originally
Between stable operation, it is cost-effective, increased system work stability.
Description of the drawings
Fig. 1 is conspectus before electric melting furnace track remodelling；
Fig. 2 is conspectus after electric melting furnace track remodelling.
Specific embodiment
As shown in figure 1, before electric melting furnace track remodelling, the stationary contact of the first stove door switch is connected with upper strata electrical heating wire,
The movable contact of the first stove door switch is connected with power supply, constitutes heating circuit, stationary contact and lower floor's electricity of the second stove door switch
Heater strip connects, and the movable contact of the second stove door switch is connected with mains supply, constitutes heating circuit, the fire door when fire door is closed
Switch closure, line conduction, when door opened, stove door switch disconnects, and circuit disconnects, and stops heating, and thermocouple detection is located at upper
Mold temperature between layer heater strip and lower floor's heater strip, main control module detection mold temperature, during higher than the temperature for setting, control
Stove door switch stops heating, and during less than design temperature, master control module controls stove door switch begins to warm up.
As shown in Fig. 2 furnace temperature control system, including the first mechanical heater switch, the second machinery heating are melted in a kind of electric smelting
Switch, the first solid-state relay, the second solid-state relay, upper strata heater strip, lower floor's heater strip, thermocouple, the first machinery heating
The movable contact and stationary contact of switch is connected respectively with the input of the first solid-state relay, the output end point of the first solid-state relay
It is not connected with upper strata heater strip and power line；The movable contact and stationary contact of the second mechanical heater switch respectively with the second solid-state relay
The input connection of device, the output end of the second solid-state relay is connected respectively with lower floor's heater strip and power line, the temperature of thermocouple
Degree detector unit detection is located at the mold temperature between upper strata heater strip and lower floor's heater strip, and output end and the electric smelting of thermocouple are melted
The main control module connection of stove.
Solid-state relay (referred to as " SSR "), is a kind of new noncontacting switch device being all made up of solid state electrical components
Part, it can reach contactless using the switching characteristic of electronic component (such as switch triode, bidirectional triode thyristor semiconductor devices)
The purpose of no-spark ground make-and-break contact, therefore it is otherwise known as " noncontacting switch ".Solid-state relay is that a kind of four end has
Source device, two of which terminal is input control end, and in addition two ends are output-controlled end, and its existing amplification driving effect has again
Buffer action, is well suited for driving high power switch formula executing agency.After track remodelling, mechanical heating furnace door switch control rule is consolidated
State relay, solid-state relay controls the heating action of electrical heating wire, and in the circuit after improvement, mechanical heating furnace door switch only flows
Cross tens milliamperes of small current, it is to avoid original mechanical heating furnace door switch directly flows through high current and makes with heating wire composition loop
Into the contact that causes struck sparks heat ageing, ablation, easy loose contact, adhesion.Originally in circuit, mechanical heating furnace door switch is sent out
Raw failure, the main control module of electric melting furnace is detected and flowed through without electric current, work can be automatically stopped, in holding state.Solid-state
Relay is electronic switch, and with fast, noiselessness is reacted, loss-free advantage is improved through circuit, and one or two was needed originally
The mechanical heating furnace door switch for being accomplished by the moon changing can be cost-effective with long-time steady operation, increased the steady of system work
It is qualitative.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (2)
1. furnace temperature control system is melted in a kind of electric smelting, it is characterised in that including stove door switch, solid-state relay, heater strip, thermoelectricity
Even, the stationary contact of stove door switch is connected with solid-state relay input control end, the movable contact and solid-state of stove door switch after
Another input control end connection of electrical equipment, stove door switch movable contact is closed with stationary contact when fire door is closed, in oven door opening
When disconnect, an output end of solid-state relay is connected with mains supply, another output end of solid-state relay and heater strip
Connection, the temperature detecting unit of thermocouple detects the heating unit temperature that heater strip is located at, the output end of thermocouple and electric smelting
Melt the main control module connection of stove.
2. furnace temperature control system is melted in a kind of electric smelting as claimed in claim 1, it is characterised in that the heating unit of electric melting furnace
Including upper strata heater strip and lower floor's heater strip, the temperature detecting unit detection of thermocouple is located at upper strata heater strip and lower floor's heater strip
Between mold temperature, stove door switch includes the first mechanical heater switch and the second mechanical heater switch, and solid-state relay includes
First solid-state relay and the second solid-state relay, the movable contact and stationary contact of the first mechanical heater switch respectively with the first solid-state
The input connection of relay, the output end of the first solid-state relay is connected with upper strata heater strip；Second mechanical heater switch
Movable contact and stationary contact are connected respectively with the input of the second solid-state relay, and output end and the lower floor of the second solid-state relay add
Heated filament connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153260.8A CN106643193A (en) | 2016-12-14 | 2016-12-14 | Temperature control system of electric smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153260.8A CN106643193A (en) | 2016-12-14 | 2016-12-14 | Temperature control system of electric smelting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106643193A true CN106643193A (en) | 2017-05-10 |
Family
ID=58822193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611153260.8A Pending CN106643193A (en) | 2016-12-14 | 2016-12-14 | Temperature control system of electric smelting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106643193A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420679A (en) * | 1982-02-26 | 1983-12-13 | Delta Associates, Inc. | Gas chromatographic oven using symmetrical flow of preheated - premixed ambient air |
| JPS63212975A (en) * | 1987-03-02 | 1988-09-05 | Matsushita Electric Ind Co Ltd | Temperature controller for fixing device |
| CN2604663Y (en) * | 2003-02-28 | 2004-02-25 | 鞍山师范学院 | Digital control instrument |
| CN101109041A (en) * | 2007-08-31 | 2008-01-23 | 瓦房店轴承集团有限责任公司 | Method of heating and controlling cabinet-type electric furnace |
| CN102645097A (en) * | 2012-05-09 | 2012-08-22 | 长沙东星仪器有限责任公司 | Vertical type heating furnace with furnace door |
| CN103808158A (en) * | 2012-11-10 | 2014-05-21 | 陕西子竹电子有限公司 | Sintering furnace with heating state self-diagnosis function |
| CN104283539A (en) * | 2013-07-03 | 2015-01-14 | 山东电力集团公司临沂供电公司 | Non-contact switch |
| CN204462904U (en) * | 2015-04-02 | 2015-07-08 | 杨国乐 | A kind of temperature control system be applied on Battery formation equipment |
| CN206339107U (en) * | 2016-12-14 | 2017-07-18 | 山东钢铁股份有限公司 | Furnace temperature control system is melted in a kind of electric smelting |
-
2016
- 2016-12-14 CN CN201611153260.8A patent/CN106643193A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420679A (en) * | 1982-02-26 | 1983-12-13 | Delta Associates, Inc. | Gas chromatographic oven using symmetrical flow of preheated - premixed ambient air |
| JPS63212975A (en) * | 1987-03-02 | 1988-09-05 | Matsushita Electric Ind Co Ltd | Temperature controller for fixing device |
| CN2604663Y (en) * | 2003-02-28 | 2004-02-25 | 鞍山师范学院 | Digital control instrument |
| CN101109041A (en) * | 2007-08-31 | 2008-01-23 | 瓦房店轴承集团有限责任公司 | Method of heating and controlling cabinet-type electric furnace |
| CN102645097A (en) * | 2012-05-09 | 2012-08-22 | 长沙东星仪器有限责任公司 | Vertical type heating furnace with furnace door |
| CN103808158A (en) * | 2012-11-10 | 2014-05-21 | 陕西子竹电子有限公司 | Sintering furnace with heating state self-diagnosis function |
| CN104283539A (en) * | 2013-07-03 | 2015-01-14 | 山东电力集团公司临沂供电公司 | Non-contact switch |
| CN204462904U (en) * | 2015-04-02 | 2015-07-08 | 杨国乐 | A kind of temperature control system be applied on Battery formation equipment |
| CN206339107U (en) * | 2016-12-14 | 2017-07-18 | 山东钢铁股份有限公司 | Furnace temperature control system is melted in a kind of electric smelting |
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Legal Events
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
|
| WD01 | Invention patent application deemed withdrawn after publication |