CN204494798U - A kind of salt bath furnace and electric-control system thereof - Google Patents
A kind of salt bath furnace and electric-control system thereof Download PDFInfo
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- CN204494798U CN204494798U CN201520163259.8U CN201520163259U CN204494798U CN 204494798 U CN204494798 U CN 204494798U CN 201520163259 U CN201520163259 U CN 201520163259U CN 204494798 U CN204494798 U CN 204494798U
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- salt bath
- phase
- bath furnace
- temp controlled
- controlled meter
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Abstract
The utility model discloses a kind of salt bath furnace and electric-control system thereof, comprise temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, automatic control unit and temp controlled meter control connection, the signal input part of temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, and the power supply control end of three-phase ac transformer is also connected with a contactor be connected with hand control switch.Salt bath furnace of the present utility model adopts the control mode automatically and manually combined, manual mode is used to be controlled by A.C. contactor during cold start-up, transformer adopts small area analysis to start, be directly switch to automatic control mode after reaching design temperature, solve and adopt pure automatic control mode cannot start or start unstable problem.The structure of this system is simple, it is compact to install, low cost of manufacture, easy to maintenance, and energy-conserving and environment-protective, accuracy of temperature control are high, failure rate is low.
Description
Technical field
The utility model relates to a kind of salt bath furnace and electric-control system thereof.
Background technology
Salt bath furnace (salt-bath furnace) to refer to melting saline solution as heat medium, workpiece is immersed the industrial furnace (heating in saline solution by metal electrode) heated in saline solution.Low pressure (5.5 ~ 36 volts) big current alternating current is introduced in stove by metal electrode by electrode salt bath furnace, and electric current flows through saline solution heating.Saline solution is heater, is again the medium to workpiece heat.Salt liquid temp is different according to saline solution composition, generally between 150 ~ 1300 DEG C.Because solid salt is non-conductive, first to starting electrode power transmission during blow-on, utilize the resistance heating of starting electrode that a part of salt is first melted, then connect main electrode and electric current to be generated heat work by fused salt.The firing rate of salt bath furnace is fast, homogeneous temperature.Workpiece is in heating in saline solution all the time, and when workpiece is come out of the stove, surface is again with one deck salt film, so surface of the work can be prevented to be oxidized and decarburization.Salt bath furnace can be used for the heat treatment such as quenching, annealing, tempering, cyaniding, the timeliness heating of carbon steel, steel alloy, tool steel, mould steel and aluminium alloy etc., slight oxidization heating when also can be used for steel precision forging.
At present, salt bath furnace electric-control system generally uses two kinds of control modes, and the first A.C. contactor controls three-phase ac transformer, and transformer becomes and 36V low voltage and high current; The second controls magnetic voltage regulator/transformer by contactor, by magnetic voltage regulator/transformer transformation adjustment size of current.Above two kinds of controls have following shortcoming: utilize contactor control transformer accuracy of temperature control poor, consume energy high, and fault rate is also high; In addition, it is inadequate that magnetic voltage regulator/transformer controls electric current width, and becoming is out two-phase direct current, and accuracy of temperature control is poor, and cost is high, affects product quality.
Chinese Patent Application No. 201320739099.8 discloses a kind of autocontrol salt bath furnace, comprise the infrared observing and controlling head, temperature digital display adjusting and control instrument, power regulator, the transformer that connect in turn and go deep into the electrode of salt bath furnace, adopt infrared measurement of temperature adjusting apparatus measure and control power regulator regulating and controlling temperature, salt bath furnace is operated in the deviation range of design temperature.
Chinese Patent Application No. 201320828002.0 discloses a kind of salt bath furnace temperature control system, the temperature collecting cell of this system gathers the temperature of salt bath furnace, and the temperature collected is sent to controller, when controller determines that this temperature has been more than preset temperature value, export control signal, thus utilize power-off control unit to control the primary power source de-energizes of salt bath furnace, avoid salt bath furnace temperature too high.
Above-mentioned two kinds of electric-control systems all adopt pure automatic control mode, power supply unit is controlled according to the real time temperature of salt bath furnace by temperature controller or controller, but according to the result of operation, these two kinds of control modes all exist pure automatic control mode cannot start or start unstable problem, and control mode is comparatively single, maintenance of breaking down is inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of salt bath furnace electric-control system, to solve that existing electric control system controls mode is comparatively single and alone automated manner starts unstable problem, provides a kind of salt bath furnace using this electric-control system simultaneously.
In order to realize above object, the technical scheme that the utility model adopts is: a kind of salt bath furnace electric-control system, comprise temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, described three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, described automatic control unit and temp controlled meter control connection, the signal input part of described temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, and the power supply control end of described three-phase ac transformer is also connected with a contactor be connected with hand control switch.
Described automatic control unit adopts silicon controlled toggle and controllable silicon, and the input of described silicon controlled toggle is connected with temp controlled meter.
Described temp controlled meter is PID digital display temperature-control table.
The signal input part of described temp controlled meter is also connected with electric current for detecting three phase supply power supply and voltage detecting circuit.
The output of described temp controlled meter is also connected with warning circuit.
The utility model additionally provides a kind of salt bath furnace, its technical scheme is as follows: comprise body of heater, the metal electrode arranged in body of heater and electric-control system thereof, described electric-control system comprises temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, described three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, described automatic control unit and temp controlled meter control connection, the signal input part of described temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, the power supply control end of described three-phase ac transformer is also connected with a contactor be connected with hand control switch.
Described automatic control unit adopts silicon controlled toggle and controllable silicon, and the control input end of described silicon controlled toggle is connected with temp controlled meter.
Described temp controlled meter is PID digital display temperature-control table.
The signal input part of described temp controlled meter is also connected with electric current for detecting three phase supply power supply and voltage detecting circuit.
The output of described temp controlled meter is also connected with warning circuit.
Salt bath furnace of the present utility model and electric-control system thereof adopt the control mode automatically and manually combined, manual mode is used to be controlled by A.C. contactor during cold start-up, transformer adopts small area analysis to start, be directly switch to automatic control mode after reaching design temperature, solve and adopt pure automatic control mode cannot start or start unstable problem.The structure of this system is simple, it is compact to install, low cost of manufacture, easy to maintenance, and energy-conserving and environment-protective, accuracy of temperature control are high, failure rate is low.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the utility model first embodiment;
Fig. 2 is the structure principle chart of the utility model second embodiment;
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 1 the schematic diagram of the utility model salt bath furnace electric-control system embodiment, as seen from the figure, this system comprises temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, automatic control unit and temp controlled meter control connection, the signal input part of temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, and the power supply control end of three-phase ac transformer is also connected with a contactor be connected with hand control switch.
The form of automatic control unit is a lot, can adopt power regulator, switching tube or relay, and as shown in Figure 2, the present embodiment adopts silicon controlled toggle and controllable silicon, and the input of silicon controlled toggle is connected with temp controlled meter.Silicon controlled toggle triggers controllable silicon, thus the output of control transformer.
In addition, the temp controlled meter of the present embodiment selects PID digital display temperature-control table, and the signal input part of temp controlled meter is also connected with electric current for detecting three phase supply power supply and voltage detecting circuit, and the output of temp controlled meter is also connected with warning circuit.The control signal of control signal to temp controlled meter according to electric current, voltage regulates; this system is made to have the function of current limit, current protection, voltage restriction, overvoltage protection, three-phase current unbalance warning; and this system has open loop voltage regulation, Closed-loop Constant-current, closed loop constant voltage, invariable power 4 kinds of regulative modes; concrete adjustment process is the ordinary skill in the art, does not repeat them here.
The utility model additionally provides a kind of salt bath furnace, and comprise the metal electrode and electric-control system thereof that arrange in body of heater, body of heater, the structure of described electric-control system is described above.
Operation principle of the present utility model and process as follows:
In use, first cold start-up is carried out, first must control A.C. contactor with hand control switch to close, three-phase ac transformer adopts small area analysis to start, after reaching certain serviceability temperature, electric-control system automatically switches to temp controlled meter and automatically controls, and triggers controllable silicon by controllable silicon contactor, the power supply circuits of conducting transformer and three phase supply power supply, make transformer output linearity electric current.
During work, the real time temperature signal of furnace temperature sensor is input in temp controlled meter, and compare with the design temperature of temp controlled meter, control signal is exported via the PID of inside according to the temperature gaps of two kinds and temperature changing trend, to control automatic control unit action, the output of transformer is controlled, regulates the temperature in body of heater accordingly.
In addition, when the temperature controller of salt bath furnace controls the controllable silicon of malfunctioning or automatic control unit or relay occurs abnormal, and the temperature of moulding salt bath furnace too high time, the actual temperature that this system collects by observation furnace temperature sensor, if when the temperature of Current Salt liquid furnace is beyond the safe temperature preset, adopt hand control switch to cut off power supply, avoid the unreliability that have employed automatic control mode.
The utility model adopts the control mode automatically and manually combined to improve temperature-controlled precision, change workpiece quality, reach the object of energy-conserving and environment-protective simultaneously, accuracy of temperature control by original ± 15 DEG C be promoted to ± 5 DEG C, substantially increase energy-saving effect.
Above embodiment only understands core concept of the present utility model for helping; the utility model can not be limited with this; for those skilled in the art; every according to thought of the present utility model; the utility model is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection domain of the present utility model.
Claims (10)
1. a salt bath furnace electric-control system, comprise temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, described three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, described automatic control unit and temp controlled meter control connection, the signal input part of described temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, it is characterized in that: the power supply control end of described three-phase ac transformer is also connected with a contactor be connected with hand control switch.
2. salt bath furnace electric-control system according to claim 1, is characterized in that: described automatic control unit adopts silicon controlled toggle and controllable silicon, and the input of described silicon controlled toggle is connected with temp controlled meter.
3. salt bath furnace electric-control system according to claim 1 and 2, is characterized in that: described temp controlled meter is PID digital display temperature-control table.
4. salt bath furnace electric-control system according to claim 3, is characterized in that: the signal input part of described temp controlled meter is also connected with electric current for detecting three phase supply power supply and voltage detecting circuit.
5. salt bath furnace electric-control system according to claim 4, is characterized in that: the output of described temp controlled meter is also connected with warning circuit.
6. a salt bath furnace, comprise body of heater, the metal electrode arranged in body of heater and electric-control system thereof, described electric-control system comprises temp controlled meter and the three-phase ac transformer for powering to metal electrode in salt bath furnace, described three-phase ac transformer is used for being connected with three phase supply Power supply by automatic control unit, described automatic control unit and temp controlled meter control connection, the signal input part of described temp controlled meter is connected with the furnace temperature sensor for detecting in-furnace temperature, it is characterized in that: the power supply control end of described three-phase ac transformer is also connected with a contactor be connected with hand control switch.
7. salt bath furnace according to claim 6, is characterized in that: described automatic control unit adopts silicon controlled toggle and controllable silicon, and the control input end of described silicon controlled toggle is connected with temp controlled meter.
8. the salt bath furnace according to claim 6 or 7, is characterized in that: described temp controlled meter is PID digital display temperature-control table.
9. salt bath furnace according to claim 8, is characterized in that: the signal input part of described temp controlled meter is also connected with electric current for detecting three phase supply power supply and voltage detecting circuit.
10. salt bath furnace according to claim 9, is characterized in that: the output of described temp controlled meter is also connected with warning circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163259.8U CN204494798U (en) | 2015-03-23 | 2015-03-23 | A kind of salt bath furnace and electric-control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520163259.8U CN204494798U (en) | 2015-03-23 | 2015-03-23 | A kind of salt bath furnace and electric-control system thereof |
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| CN204494798U true CN204494798U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520163259.8U Withdrawn - After Issue CN204494798U (en) | 2015-03-23 | 2015-03-23 | A kind of salt bath furnace and electric-control system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227264A (en) * | 2016-08-24 | 2016-12-14 | 成都飞机工业（集团）有限责任公司 | A kind of salt bath furnace temperature control system |
| CN106643194A (en) * | 2016-12-30 | 2017-05-10 | 四川航天拓鑫玄武岩实业有限公司 | Temperature control system and method for basalt electric boosting melting kiln |
| CN107894174A (en) * | 2017-09-16 | 2018-04-10 | 江苏渝鑫科技股份有限公司 | A kind of kiln temperature control system for processing VN alloy |
-
2015
- 2015-03-23 CN CN201520163259.8U patent/CN204494798U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227264A (en) * | 2016-08-24 | 2016-12-14 | 成都飞机工业（集团）有限责任公司 | A kind of salt bath furnace temperature control system |
| CN106227264B (en) * | 2016-08-24 | 2018-03-16 | 成都飞机工业（集团）有限责任公司 | A kind of salt bath furnace temperature control system |
| CN106643194A (en) * | 2016-12-30 | 2017-05-10 | 四川航天拓鑫玄武岩实业有限公司 | Temperature control system and method for basalt electric boosting melting kiln |
| CN106643194B (en) * | 2016-12-30 | 2019-04-23 | 四川航天拓鑫玄武岩实业有限公司 | Basalt electric boosting kiln temperature control system and method |
| CN107894174A (en) * | 2017-09-16 | 2018-04-10 | 江苏渝鑫科技股份有限公司 | A kind of kiln temperature control system for processing VN alloy |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 453211 Xinxiang District, Henan City, Yanjin Province industrial agglomeration area north 307 line Patentee after: Henan Tianli thermal equipment Limited by Share Ltd Address before: Yanjin zuocheng County of Xinxiang City, Henan province 453211 (307 North Road) Patentee before: Tian Li industrial furnace Co., Ltd of Henan Province |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20210303 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20210303 |