CN106440846B - Heat-treating methods and the resistance furnace are carried out with two formula resistance furnaces equipped with the time relay - Google Patents
Heat-treating methods and the resistance furnace are carried out with two formula resistance furnaces equipped with the time relay Download PDFInfo
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- CN106440846B CN106440846B CN201610792927.2A CN201610792927A CN106440846B CN 106440846 B CN106440846 B CN 106440846B CN 201610792927 A CN201610792927 A CN 201610792927A CN 106440846 B CN106440846 B CN 106440846B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000000007 visual effect Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
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- 229910010271 silicon carbide Inorganic materials 0.000 description 2
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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
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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
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
- F27D21/04—Arrangement of indicators or alarms
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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
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- General Engineering & Computer Science (AREA)
- Control Of Resistance Heating (AREA)
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Abstract
Heat-treating methods and the resistance furnace are carried out with two formula resistance furnaces equipped with the time relay, is related to two formula resistance furnaces.Purpose is to solve existing two formulas temperature resistance stove overtemperature alarm Problem of Failure, resistance furnace is powered up for the first time in the case of empty stove, wait for that furnace temperature after second of arrival given temperature, continues to the load supplying of the resistance furnace until furnace temperature reaches alarm temperature under the control of original temperature control system.Measurement reaches given temperature from furnace temperature to the duration value for reaching alarm temperature for the second time, using the duration value as the delay power duration of the time relay, the power circuit of the power input of the power input connection resistance furnace load of the relay, the power output end of the time relay connects audible and visual alarm module, when resistance furnace load single energization period reaches the duration value, audible and visual alarm module, which obtains, electric sends out acousto-optic.This method and the resistance furnace have the advantages that be alerted when overtemperature occurs.Suitable for two formula resistance furnace heat treatment process.
Description
Technical field
The present invention relates to the method and the resistance furnace that carry out overtemperature alarm with two formula resistance furnaces equipped with the time relay,
Applied to two formula temperature resistance stove fields.
Background technology
Resistance furnace is so that heating element or heat medium in stove is generated heat using electric current, to the work heated to workpiece or material
Industry stove.Resistance furnace is in mechanical industry for heating, metal heat treatmet heating, soldering, powder metallurgy sintered, glass before metal forging
Glass ceramics roast and annealing, low-melting-point metal fusing, the drying etc. of sand mold and paint film.
The adjusting of resistance furnace furnace temperature (automatically control) mode it is general there are three types of：Two formula automatic adjustments, continuous P ID are adjusted automatically
Section and quasi-continuous automatic adjustment.The furnace temperature regulative mode of most resistance furnaces of eighties of last century belongs to two formulas and adjusts automatically
Section.At the beginning of proximal or into this century, increased sharply using the ratio of the resistance furnace of latter two regulative mode.Because of two formulas
The resistance furnace of self adjusting resistance furnace temperature have the advantages that it is simple in structure, cheap, so be widely used in furnace temperature essence
Spend metal heat treatmet processing scene of less demanding.
Two formula resistance furnaces of small-power use individual event alternating current, relatively high power or high-power two formula resistance furnaces to use three-phase
Alternating current.It is switched using three-phase disconnecting link is provided on the power supply circuit of the resistance furnace of three-phase alternating current, each phase is all provided with 1
Heat melting device and 1 contactor；Using on the power supply circuit of the resistance furnace of single-phase alternating current be provided with single-phase chopper switch, heat melting device
And contactor.
Two common formula temperature resistance stoves are made of furnace body and control mechanism.Load in resistance furnace body is electric heating member
Part, the heating element are usually heating wire or silicon carbide rod, react these heating elements and claim to the physical quantity of electric current drag size
For resistance.The control mechanism is by devices such as thermocouple circuit, compensation circuit, electron potentiometer and overtemperature alarm and many
Instrument forms, and there is monitoring resistor stove furnace temperature, the control contactor resistance furnace is powered and be powered off, detects event
The functions such as barrier, Realtime Alerts.The effect of the heat melting device is overcurrent protection.
It is to control the on-off of main circuit as its basic adjusting action, generally using contactor that two formula temperature, which are adjusted,
It says, is exactly controlled by thermometric instrument, contactor makes main circuit power off when stove is warming up to given temperature, and stove is cooled to constant temperature
Contactor makes main circuit be powered when spending.Temperature is less than given temperature when initial with stove, and resistance furnace input power is 100% (full work(
Rate, which is powered, to heat up), when furnace temperature reaches given temperature, contactor makes stove power off, and stove input power is reduced to zero, at this point, by
In stove there is thermal inertia, furnace temperature to continue to after slightly rising one section of temperature, just begin to decline.Furnace temperature drops to given temperature
When, contactor makes stove be powered again, heating with full power stove, at this point, under due to stove there is thermal inertia, furnace temperature to still provide for slightly
Drop, drops to minimum point rear and starts to warm up, and when furnace temperature is raised to given temperature, stove powers off again, this moment again because thermal inertia continues
Slightly heating.Stove is so continuously powered, powers off alternately to go down, and furnace temperature is centered on given value, similar sinusoidal
Fluctuation and maintain furnace temperature (average value) for given value with the smaller temperature difference (deviation) for a long time, until there is change temperature given value
Instruction occur.Above is exactly the basic process of two formula automatic adjustment furnace temperature of resistance furnace.It does not send out and changes in temperature control regulating system
In the case of temperature set point command, if it is more than to occur being powered, being necessarily directed at furnace temperature, continuously raising is more than, is more than normal temperature control
The phenomenon that range is exactly overtemperature.
That is, in the given time, the furnace temperature of resistance furnace be always to maintain and (automatically control) needed in processing technology it is a certain
Temperature value.This temperature is usually known as " given temperature ", " temperature given value ", " set point of temperature " or " operating temperature ".Resistance
The temperature control of stove is alternatively referred to as " temperature adjusting ".Under normal circumstances, when generation resistance furnace firewire phase shortage or fractional load open circuit
When, two Wei Shi Temperature Control of Electric Resistance Furnace mechanisms can detect the power supply that failure has occurred and sent out sound-light alarm, cut off resistance furnace,
I.e. resistance furnace has overtemperature alarm function；But multiple electrical parts for being used due to two formula resistance furnace control systems and a variety of
Instrument can be influenced by factors, to which resistance furnace furnace temperature occur unexpectedly more than given temperature but without alarming, also not having
There is the phenomenon that power supply of cut-out resistance furnace, referred to as overtemperature alarm fails.If overtemperature alarm failure occurs without being found in time
And prevent, it will it is unqualified or even scrapped by heating workpiece, the accident that resistance furnace is burned out to cause to be heated workpiece.
The control mechanism is complicated, procedure links are numerous, and when work will be affected by many factors, such as：Temperature,
Surge, mechanical damage, vibration and internal fault etc.；It can make stove that overtemperature occur if having in control mechanism and breaking down at one
Or overtemperature alarm failure of removal.As it can be seen that the fragility that the control mechanism of two formula resistance furnaces is intrinsic, is that overtemperature or overtemperature alarm lose
Imitate repeatly existing more than basic reason.Although containing excess temperature alarm device in control mechanism, the failure of overtemperature alarm failure
It happens occasionally.Here it is the necessity that this patent prevents resistance furnace generation overtemperature or overtemperature alarm failure of removal new method.
Break about firewire, load (heating wire or silicon carbide rod) disconnected common cause is usually：Heating element or conducting wire with
Element joint for a long time at high temperature (1200 DEG C~1400 DEG C) contacted with air by oxidation, aging and scaling loss, ruin naturally it is disconnected；It is long
The abnormity support brick for the picking-up heating element that phase works at high temperature is damaged or aging causes heating element to deform, off normal or short circuit；
It is disconnected that the fuse go also belongs to firewire；The improper stove that such as takes on of manual operation directly hits wiping stove brick or heating element or workpiece and electric heating
Element has the maloperations such as contact that can cause, and firewire is disconnected or load is disconnected；Between Filamentous heating element or element is welded with connecting position of wires
If mouth has rosin joint or effective cross section is narrow or welding rod material is bad is easily blown；Elema and other non-metal electric heating elements
Aging and brittle failure.
Invention content
The purpose of the present invention is to solve two formula temperature resistance stove overtemperatures to alert Problem of Failure, and then proposes to use to set
Two formula resistance furnaces of having time relay carry out heat-treating methods and the resistance furnace.
The present invention provides a kind of specific step carrying out heat-treating methods with two formula resistance furnaces equipped with the time relay
Suddenly it is：
Step 1: the load (5) of two formula temperature resistance stoves is powered for the first time, when the stove of two formulas temperature resistance stove
After interior temperature reaches given temperature, two formulas temperature control electricity is controlled by the temperature control modules of two formulas temperature resistance stove
3 contactors (3) hindered in the supply line of the load (5) of stove simultaneously switch off, and realize to two formulas temperature resistance stove
(5) power-off is loaded, the furnace temperature of two formula temperature resistance stoves is because thermal inertia will continue to increase and fall after rise；
Step 2: according to the delay power duration of 3 time relays (4) of delay time parameter setting of the time relay
A；The fire line terminal of the power input of 3 time relays (4) is consecutively connected to two formula temperature resistance stoves respectively
Load (5) three phase mains circuit each phase line on, the zero curve of the power input of 3 time relays (4)
Terminal ground, the power output end connection audible and visual alarm module (7) of each time relay (4)；So that each institute
The time relay (4) is stated to start to work when the load (5) of two formula temperature resistance stoves is powered；
Step 3: when the furnace temperature of two formulas temperature resistance stove drops to given temperature, by two formula temperature controls
The temperature control modules of resistance furnace control 3 contactors (3) and are closed at, and make the load (5) of two formulas temperature resistance stove
It is powered, meanwhile, the time relay (4) is started to work；
Step 4: when the furnace temperature of two formulas temperature resistance stove reaches given temperature, two formula temperature resistances
The temperature control modules of stove control 3 contactors (3) and simultaneously switch off, and 3 time relays (4) are stopped；Institute
The furnace temperature of two formula temperature resistance stoves is stated because thermal inertia continues to increase and fall after rise；If the furnace temperature of two formulas temperature resistance stove
Reach given temperature when, (when 3 contactors 3 should disconnect but be not turned off) if 3 contactors (3) do not disconnect,
Then 3 time relays (4) work on, when the energization period of any time relay (4) reaches in step 2
After the delay power time of setting, which accuses the acousto-optic of the power output end connection of the time relay
Alert module (7) is powered, and the audible and visual alarm module (7) is made to send out audible and visual alarm；
Step 5: step 3 and step 4 are repeated in, until heat treatment process is completed；
Wherein, the acquisition methods of the delay time parameter of the time relay described in step 2 are：It is right in full stove
The load (5) of two formulas temperature resistance stove is powered for the first time, when its furnace temperature reaches given temperature for the first time, to two formulas
The load (5) of temperature resistance stove powers off；When its furnace temperature continues to increase and then fall back to given temperature because of thermal inertia, to described two
The load (5) of position formula temperature resistance stove is powered and starts timing, and furnace temperature is because thermal inertia continues to decline and then goes back up to constant temperature
Continue the energization of the load (5) to two formulas temperature resistance stove when spending, until its furnace temperature stops timing when reaching alarm temperature
And the load (5) of two formulas temperature resistance stove is powered off, obtained timing time length value is the time relay
(4) the delay power duration A set in；This method is suitable for two formula resistance furnaces using three phase mains.Technical staff can root
According to the quantity and material of workpiece to be machined, the delay powers duration value of the time relay is finely adjusted.
A kind of two formula resistance furnaces equipped with the time relay, including 3 phase chopper switchs (1), 3 fuses (2), 3
One end of the load (5) of contactor (3), two formula temperature resistance stoves, the 3 phase chopper switch (1) connects three-phase alternating-current supply
Each phase；The other end of the 3 phase chopper switch (1) is sequentially connected one end of 3 fuses (2) respectively, described 3
The other end of fuse (2) is sequentially connected one end of 3 contactors (3) respectively；The other end of 3 contactors (3)
It is sequentially connected the power input of the load (5) of two formulas temperature resistance stove respectively；It is described equipped with the time relay two
Position formula resistance furnace further includes 3 time relays (4) and 3 audible and visual alarm modules (7), the electricity of 3 time relays (4)
The fire line terminal of source input terminal is sequentially connected the other end of 3 contactors (3) respectively；3 time relays (4)
The zero terminal of power input is grounded；The power output end of 3 time relays (4) is sequentially connected 3 acousto-optics respectively
Alarm module (7).
The beneficial effects of the invention are as follows：Since the present invention uses above-mentioned technical proposal, make two formula temperature resistance stoves in original
There is the advantages of increasing energization period control, be provided with double control on the basis of temperature control mechanism, two formula temperature have been effectively ensured
Overtemperature does not occur, overtemperature alarm failure accidents do not occur for control resistance furnace, and the qualification rate of heat treatment process workpiece is made to promote 30%, from
And reach the purpose of the present invention.
Description of the drawings
Fig. 1 is to realize the flow chart that heat-treating methods are carried out with two formula resistance furnaces equipped with the time relay.
Fig. 2 is a kind of structural schematic diagram of two formula resistance furnaces equipped with the time relay.
Fig. 3 is the thermal control features curve synoptic diagram of two formula resistance furnaces.
Fig. 4 is the measurement method schematic diagram that two formula resistance furnaces reach alarm temperature required time A.
Specific implementation mode
Specific implementation mode one：Illustrate present embodiment in conjunction with Fig. 1 to 4, when a kind of described in present embodiment is with being equipped with
Between relay two formula resistance furnaces carry out heat-treating methods the specific steps are：
Step 1: the load (5) of two formula temperature resistance stoves is powered for the first time, when the stove of two formulas temperature resistance stove
After interior temperature reaches given temperature, two formulas temperature control electricity is controlled by the temperature control modules of two formulas temperature resistance stove
3 contactors (3) hindered in the supply line of the load (5) of stove simultaneously switch off, and realize to two formulas temperature resistance stove
(5) power-off is loaded, the furnace temperature of two formula temperature resistance stoves is because thermal inertia will continue to increase and fall after rise；
Step 2: according to the delay power duration of 3 time relays (4) of delay time parameter setting of the time relay
A；The fire line terminal of the power input of 3 time relays (4) is consecutively connected to two formula temperature resistance stoves respectively
Load (5) three phase mains circuit each phase line on, the zero curve of the power input of 3 time relays (4)
Terminal ground, the power output end connection audible and visual alarm module (7) of each time relay (4)；So that each institute
The time relay (4) is stated to start to work when the load (5) of two formula temperature resistance stoves is powered；
Step 3: when the furnace temperature of two formulas temperature resistance stove drops to given temperature, by two formula temperature controls
The temperature control modules of resistance furnace control 3 contactors (3) and are closed at, and make the load (5) of two formulas temperature resistance stove
It is powered, meanwhile, the time relay (4) is started to work；
Step 4: when the furnace temperature of two formulas temperature resistance stove reaches given temperature, two formula temperature resistances
The temperature control modules of stove control 3 contactors (3) and simultaneously switch off, and 3 time relays (4) are stopped；Institute
The furnace temperature of two formula temperature resistance stoves is stated because thermal inertia continues to increase and fall after rise；If the furnace temperature of two formulas temperature resistance stove
Reach given temperature when, (when 3 contactors 3 should disconnect but be not turned off) if 3 contactors (3) do not disconnect,
Then 3 time relays (4) work on, when the energization period of any time relay (4) reaches in step 2
After the delay power time of setting, which accuses the acousto-optic of the power output end connection of the time relay
Alert module (7) is powered, and the audible and visual alarm module (7) is made to send out audible and visual alarm；
Step 5: step 3 and step 4 are repeated in, until heat treatment process is completed.
Specific implementation mode two：Illustrate that present embodiment, present embodiment are to specific implementation mode one in conjunction with Fig. 1 to 4
Further explanation, the acquisition methods of the delay time parameter of the time relay described in step 2 are：It is right in full stove
The load (5) of two formulas temperature resistance stove is powered for the first time, when its furnace temperature reaches given temperature for the first time, to two formulas
The load (5) of temperature resistance stove powers off；When its furnace temperature continues to increase and then fall back to given temperature because of thermal inertia, to described two
The load (5) of position formula temperature resistance stove is powered and starts timing, and furnace temperature is because thermal inertia continues to decline and then goes back up to constant temperature
Continue the energization of the load (5) to two formulas temperature resistance stove when spending, until its furnace temperature stops timing when reaching alarm temperature
And the load (5) of two formulas temperature resistance stove is powered off, obtained timing time length value is the time relay
(4) the delay power duration A set in；This method is suitable for two formula resistance furnaces using three phase mains.Technical staff can root
According to the quantity and material of workpiece to be machined, the delay powers duration value of the time relay is finely adjusted.
Specific implementation mode three：Illustrate present embodiment in conjunction with Fig. 2 to 4, one kind described in present embodiment is equipped with the time
Two formula resistance furnaces of relay, including 3 phase chopper switchs (1), 3 fuses (2), 3 contactors (3) at the same with two formulas
The load (5) of temperature resistance stove, each phase of one end connection three-phase alternating-current supply of the 3 phase chopper switch (1)；3 phase
The other end of chopper switch (1) is sequentially connected one end of 3 fuses (2), the other ends of 3 fuses (2) according to
Secondary connection 3 contactors (3) at the same one end；3 contactors (3) at the same the other end be sequentially connected described two
The power input of the load (5) of formula temperature resistance stove；When two formula resistance furnaces equipped with the time relay further include 3
Between relay (4) and 3 audible and visual alarm modules (7), the fire line terminal of the power input of 3 time relays (4) point
Be not sequentially connected 3 contactors (3) and meanwhile the other end；The zero curve of the power input of 3 time relays (4)
Terminal ground；The power output end of 3 time relays (4) is sequentially connected 3 audible and visual alarm modules (7) respectively.
Claims (3)
1. carrying out heat-treating methods with equipped with two formula resistance furnaces of the time relay, which is characterized in that this method it is specific
Step is：
Step 1: the load (5) of two formula temperature resistance stoves is powered for the first time, when warm in the stove of two formulas temperature resistance stove
After degree reaches given temperature, two formulas temperature resistance stove is controlled by the temperature control modules of two formulas temperature resistance stove
Load (5) supply line on 3 contactors (3) simultaneously switch off, realize load to two formulas temperature resistance stove
(5) it powers off, the furnace temperature of two formula temperature resistance stoves is because thermal inertia will continue to increase and fall after rise；
Step 2: according to the delay power duration A of 3 time relays (4) of delay time parameter setting of the time relay；It will
The fire line terminal of the power input of 3 time relays (4) is consecutively connected to the negative of two formula temperature resistance stoves respectively
On each phase line for carrying the three phase mains circuit of (5), the zero terminal of the power input of 3 time relays (4)
Ground connection, the power output end connection audible and visual alarm module (7) of each time relay (4)；When so that each is described
Between relay (4) start to work when the load (5) of two formula temperature resistance stoves is powered；
Step 3: when the furnace temperature of two formulas temperature resistance stove drops to given temperature, by two formula temperature resistances
The temperature control modules of stove control 3 contactors (3) and are closed at, and the load (5) of two formulas temperature resistance stove is made to be powered,
Meanwhile the time relay (4) is started to work；
Step 4: when the furnace temperature of two formulas temperature resistance stove reaches given temperature, two formulas temperature resistance stove
Temperature control modules control 3 contactors (3) and simultaneously switch off, and 3 time relays (4) are stopped；Described two
The furnace temperature of position formula temperature resistance stove is because thermal inertia continues to increase and fall after rise；If the furnace temperature of two formulas temperature resistance stove reaches
When given temperature, if 3 contactors (3) do not disconnect, 3 time relays (4) work on, when any institute
State the time relay (4) energization period reach the delay power time set in step 2 after, the time relay (4) is to institute
Audible and visual alarm module (7) power supply for stating the power output end connection of the time relay, makes the audible and visual alarm module (7) send out acousto-optic
Alarm；
Step 5: step 3 and step 4 are repeated in, until heat treatment process is completed.
2. according to claim 1 carry out heat-treating methods with two formula resistance furnaces equipped with the time relay, special
Sign is that the acquisition methods of the delay time parameter of the time relay described in step 2 are：In full stove, to described two
The load (5) of position formula temperature resistance stove is powered for the first time, when its furnace temperature reaches given temperature for the first time, to two formulas temperature control electricity
Hinder load (5) power-off of stove；When its furnace temperature continues to increase and then fall back to given temperature because of thermal inertia, to two formula temperature
The load (5) of control resistance furnace, which is powered, simultaneously starts timing, when furnace temperature continues to decline and then go back up to given temperature because of thermal inertia after
The continuous load (5) to two formulas temperature resistance stove is powered, until its furnace temperature stops timing and to institute when reaching alarm temperature
Load (5) power-off of two formula temperature resistance stoves is stated, obtained timing time length value is to be set in the time relay (4)
Fixed delay power duration A；This method is suitable for two formula resistance furnaces using three phase mains.
3. a kind of two formula resistance furnaces equipped with the time relay, including 3 phase chopper switchs (1), 3 fuses (2), 3 connect
The load (5) of tentaculum (3), two formula temperature resistance stoves, one end connection three-phase alternating-current supply of the 3 phase chopper switch (1)
Each phase；The other end of the 3 phase chopper switch (1) is sequentially connected one end of 3 fuses (2) respectively, and described 3 molten
The other end of disconnected device (2) is sequentially connected one end of 3 contactors (3) respectively；The other end of 3 contactors (3) point
It is not sequentially connected the power input of the load (5) of two formulas temperature resistance stove；It is characterized in that, it is described be equipped with the time after
Two formula resistance furnaces of electric appliance further include 3 time relays (4) and 3 audible and visual alarm modules (7), 3 time relays
The fire line terminal of the power input of device (4) is sequentially connected the other end of 3 contactors (3) respectively；3 time after
The zero terminal of the power input of electric appliance (4) is grounded；The power output end of 3 time relays (4) connects successively respectively
Connect 3 audible and visual alarm modules (7).
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| CN201610792927.2A CN106440846B (en) | 2016-08-31 | 2016-08-31 | Heat-treating methods and the resistance furnace are carried out with two formula resistance furnaces equipped with the time relay |
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|---|---|---|---|
| CN201610792927.2A CN106440846B (en) | 2016-08-31 | 2016-08-31 | Heat-treating methods and the resistance furnace are carried out with two formula resistance furnaces equipped with the time relay |
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| CN106440846A CN106440846A (en) | 2017-02-22 |
| CN106440846B true CN106440846B (en) | 2018-07-27 |
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| SU1694507A1 (en) * | 1989-08-15 | 1991-11-30 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Автоматизации Предприятий Промышленности Строительных Материалов | Method for control of calcination process in rotary kiln |
| CN2099946U (en) * | 1991-05-16 | 1992-03-25 | 张剑 | Constant temp. delay automatic control box type high temp. electric stove |
| CN201238404Y (en) * | 2008-06-05 | 2009-05-13 | 南京汽车锻造有限公司 | Time control apparatus for electrical heating temperature |
| CN204987887U (en) * | 2015-08-24 | 2016-01-20 | 韶关市德丰机械有限公司 | Stable form heating furnace control by temperature change circuit |
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2016
- 2016-08-31 CN CN201610792927.2A patent/CN106440846B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1694507A1 (en) * | 1989-08-15 | 1991-11-30 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Автоматизации Предприятий Промышленности Строительных Материалов | Method for control of calcination process in rotary kiln |
| CN2099946U (en) * | 1991-05-16 | 1992-03-25 | 张剑 | Constant temp. delay automatic control box type high temp. electric stove |
| CN201238404Y (en) * | 2008-06-05 | 2009-05-13 | 南京汽车锻造有限公司 | Time control apparatus for electrical heating temperature |
| CN204987887U (en) * | 2015-08-24 | 2016-01-20 | 韶关市德丰机械有限公司 | Stable form heating furnace control by temperature change circuit |
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| CN106440846A (en) | 2017-02-22 |
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Effective date of registration: 20221230 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |