CN202452830U - Rapid smelting intermediate frequency furnace - Google Patents
Rapid smelting intermediate frequency furnace Download PDFInfo
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- CN202452830U CN202452830U CN2012200401041U CN201220040104U CN202452830U CN 202452830 U CN202452830 U CN 202452830U CN 2012200401041 U CN2012200401041 U CN 2012200401041U CN 201220040104 U CN201220040104 U CN 201220040104U CN 202452830 U CN202452830 U CN 202452830U
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Abstract
The utility model relates to a rapid smelting intermediate frequency furnace and belongs to the technical field of intermediate frequency furnaces. A support is arranged on a furnace cover of the intermediate frequency furnace, a vertical guide rail and a lifting trolley are installed on the support, the lifting trolley is supported on the vertical guide rail through a roller and can move up and down, an upper chain wheel is installed at the upper end of the vertical guide rail, a lower chain wheel is installed at the lower end of the vertical guide rail, the upper chain wheel and the lower chain wheel are in a transmission connection through a chain, one end of the chain is connected onto the upper portion of the lifting trolley, and the other end of the chain is connected onto the lower portion of the lifting trolley; an intermediate frequency furnace oxygen lance is fixed on the lifting trolley, and a lance head of the intermediate frequency furnace oxygen lance is vertically inserted into the intermediate frequency furnace from the top of the furnace cover along the axis of the furnace cover. The oxygen lance can eject backing flame to preheat metal, then eject cutting flame to cut the metal, and perform stirring and slagging on molten iron after melting of the metal, decarbonization is achieved finally, a decarbonizer is not needed, smelting period is greatly shortened, power consumption of an intermediate frequency power supply is reduced, and tapping quality is good.
Description
Technical field
The utility model relates to a kind of intermediate frequency furnace, particularly a kind of quick melting intermediate frequency furnace.
Background technology
Intermediate frequency power supply is a kind of supply unit that power frequency 50HZ alternating current is changed into intermediate frequency (300HZ is above to 1000HZ); The three-phase main-frequency alternating current; Become direct current after the rectification, become adjustable electric current of intermediate frequency to direct current again, supply with by the intermediate frequency alternating current that flows through in electric capacity and the induction coil; In induction coil, produce the highdensity magnetic line of force; And the metal material that holds in the cutting induction coil, in metal material, produce very big eddy current and heat, be specially adapted to Metal Melting, heating and heat treatment operating mode.As primary winding, the metal in the crucible is as secondary coil with inductor.When going up alternating current, just produce alternating flux to induction coil is logical; Most of interlinkage of this magnetic flux the metal charge in the crucible, so in furnace charge, produce induced potential, is conductor and is the closed-loop path owing to furnace charge again; Under the effect of this induced potential, produce powerful induced-current I; Because the skin effect problem and the furnace charge of electric current have resistance R, therefore produce a large amount of Joule heats again, thereby make the furnace charge heating so that fusing.Represent as follows with the electric heating conversion formula, heat energy formula: W=I2Rt (joule), in the formula: I is the electric current in the furnace charge; R is a charging resistance; T is conduction time.
Existing intermediate frequency furnace is before dropping into steel scrap, and needing present furnace bottom shop one deck lime and bloodstone masonry is decarburizer, adds steel scrap and intensification then; After steel scrap melts clearly, continue molten iron temperature to be risen to 1560-1580 ℃, the sample analysis hot metal composition; Situation according to phosphorus content adds decarburizer for the second time, heats up, sampling again again; Add decarburizer for the third time, heat up again, so qualified until sampling.Because top formula oxygen blast combustion equipment does not adopt and adds decarburizer implementation part oxygen blast function.Have following weak point: 1 because the adding and the reaction needed longer cycle of decarburizer, but also will do the reinforced preparation of secondary three times according to the smelting situation, has a strong impact on smelting cycle.2 decarburizers are easily-consumed products, because the long power consumption that causes of cycle increases, directly strengthen smelting cost.3 because decarburizer does not have the stirring of oxygen lance to take off the slag function, causes end product quality to be difficult to control.
The utility model content
The purpose of the utility model is, overcomes the problem that exists in the prior art, and a kind of quick melting intermediate frequency furnace is provided, and can significantly compress smelting cycle, and need not to add decarburizer.
For solving above technical problem, a kind of quick melting intermediate frequency furnace that the utility model provided, the intermediate frequency furnace top is provided with bell; The bell top is provided with support; Vertical guide rail and lift cart are installed on the said support, and said lift cart is supported on the vertical guide rail through roller and can moves up and down along vertical guide rail, and said vertical guide rail upper end is equipped with upper sprocket wheel; Said vertical guide rail lower end is equipped with lower sprocket; Said upper sprocket wheel is connected through chain drive with lower sprocket, and an end of said chain is connected the top of said lift cart, and the other end of said chain is connected the bottom of said lift cart; Be fixed with the intermediate frequency furnace oxygen lance on the said lift cart, the rifle head of said intermediate frequency furnace oxygen lance inserts the intermediate frequency furnace along the bell axis normal from the top of said bell.
With respect to prior art, the utility model has been obtained following beneficial effect: the intermediate frequency furnace oxygen lance that inserts from intermediate frequency furnace top cover center can spray baking flame in earlier stage metal is carried out preheating, and metal is heated up rapidly; Then can spray cutting flame metal is cut, the intermediate frequency furnace oxygen lance can carry out molten iron is stirred and slag making behind the metal molten, finally realizes decarburization; Need not to add decarburizer; Shorten melting cycle greatly, reduced the power consumption of intermediate frequency power supply, and because the stirring slag making function of oxygen lance; Make hot metal composition even, go out steel quality and be able to guarantee; The intermediate frequency furnace oxygen lance is fixed on lift cart upper edge vertical guide rail and moves up and down; Both can guarantee flexibly; Can guarantee that again oxygen lance goes up and down along the body of heater axis; Avoid the crooked damage body of heater of rifle head, the sprocket wheel forward rotation can make oxygen lance descend and devote oneself to work, and the sprocket wheel backward rotation can make oxygen lance promote and withdraw from.
Preferred version as the utility model; The upper end of said intermediate frequency furnace oxygen lance is provided with main oxygen inlet, around oxygen intake, around fuel gas inlet, water inlet and water return outlet, the end face center of said intermediate frequency furnace oxygen lance lower end rifle head is provided with the main oxygen spray orifice that is communicated with the main oxygen inlet; The periphery of said main oxygen spray orifice be evenly distributed with a plurality of respectively be communicated with around fuel gas inlet around gas jet orifice; Said periphery around gas jet orifice be evenly distributed with a plurality of respectively be communicated with around oxygen intake around the oxygen spray orifice; Be provided with the cooling water runner in the barral of a gun of said intermediate frequency furnace oxygen lance, the two ends of said cooling water runner link to each other with said water inlet and water return outlet respectively.Regulate through main oxygen, around oxygen and around the flowrate proportioning of combustion gas and can realize that anti-blocking rifle keeps pattern, preheating mode, cut mode, high heat fusing pattern, slag making stir mode or takes off slag pattern or the like; Cooling water can cool off oxygen lance, prolongs its service life.
Preferred version as the utility model; The top center of said bell is provided with the guiding of bell coaxial line and scrapes the slag tube; Said guiding is scraped the big up and small down awl tubular of slag tube; The barral of a gun of said intermediate frequency furnace oxygen lance passes port and the lower port that said guiding is scraped the slag tube successively, and it is suitable that said guiding is scraped the barral of a gun diameter of lower port internal diameter and said intermediate frequency furnace oxygen lance of slag tube.When the intermediate frequency furnace oxygen lance moved up and down, guiding was scraped the lower port of slag tube and can be removed dregs bonding on the barral of a gun.
As the preferred version of the utility model, said upper sprocket wheel is installed on the cochain wheel shaft, and the two ends of said cochain wheel shaft are fixed on the said support through tension detecting apparatus.In the intermediate frequency furnace, tension detecting apparatus can detect the intermediate frequency furnace oxygen lance and be in state of weightlessness, sends signal to the control system in good time oxygen lance is mentioned rapidly, avoids causing big damage or accident in case oxygen lance damage, cooling water are bled.
Preferred version as the utility model; Be in series with main oxygen stop valve, main oxygen flowmeter, main oxygen control valve, main oxygen check-valves and main oxygen repid cut-off valve on the main oxygen pipeline successively, the outlet of said main oxygen repid cut-off valve inserts the main oxygen inlet of said oxygen lance; Around being in series with successively on the oxygen pipeline around the oxygen stop valve, around oxygen flow meter, around oxygen regulating valve, around oxygen check-valves and around the oxygen repid cut-off valve, said outlet around the oxygen repid cut-off valve insert said oxygen lance around oxygen intake; Around being in series with successively on the fuel gas pipeline around gas shutoff valve, around gas meter, around gas control valve, around combustion gas check-valves and around the combustion gas repid cut-off valve, said outlet around the combustion gas repid cut-off valve insert said oxygen lance around fuel gas inlet; Be in series with into water stop valve and water inlet repid cut-off valve on the cooling water inlet pipe road successively, the outlet of said water inlet repid cut-off valve inserts the water inlet of said oxygen lance; The water return outlet of said oxygen lance is in series with the return water temperature table successively, cooling water flow is taken into account the backwater stop valve, and the outlet of said backwater stop valve inserts the CWR road.
Preferred version as the utility model; The major loop of said oxygen lance drive motors comprises the counter-rotating loop that just goes back to the road and oxygen lance is promoted that oxygen lance is descended; Said just going back in the road, the oxygen lance drive motors is connected with power supply through the normally open contact of oxygen lance decline contactor; In the said counter-rotating loop, the oxygen lance drive motors is connected with power supply through the normally open contact that oxygen lance promotes contactor; In the control loop of said oxygen lance drive motors, after the normally closed interlock that oxygen lance decline button and said oxygen lance promote contactor is connected, connect again with the coil of said oxygen lance decline contactor.When the coil of oxygen lance decline contactor gets electricly, the normally open contact of oxygen lance decline contactor is closed, and the oxygen lance drive motors is just changeing descends oxygen lance; The coil that promotes contactor when oxygen lance gets electric, and the normally closed interlock that oxygen lance promotes contactor breaks off the coil losing electricity that makes oxygen lance decline contactor, and to promote the normally open contact of contactor closed for oxygen lance simultaneously, and the counter-rotating of oxygen lance drive motors promotes oxygen lance.
Preferred version as the utility model; In the control loop of said oxygen lance drive motors; Oxygen lance promotes button and the oxygen lance weightless position switch back that is connected in parallel that leaks and connects with the coil that said oxygen lance promotes contactor, and said tension detecting apparatus triggers the said oxygen lance weightless position switch closure of leaking when detecting oxygen lance weightlessness.When oxygen lance promotes that button is pressed or tension detecting apparatus detects the weightless oxygen lance that triggers of oxygen lance and leaks weightless position switch when closed; The coil that oxygen lance promotes contactor gets; The counter-rotating of oxygen lance drive motors promotes oxygen lance; The operative employee is handling failure in time, avoids accident to take place.
Preferred version as the utility model; The overheated temperature-sensitive button of backwater is connected in parallel afterwards with said oxygen lance lifting button and the coil of said oxygen lance lifting contactor is connected; When the water temperature of said oxygen lance water return outlet surpassed setting value, the overheated temperature-sensitive button actions of said backwater was closed.When the water temperature of oxygen lance water return outlet surpasses setting value, when the overheated temperature-sensitive button of backwater was closed, the coil that oxygen lance promotes contactor got electric, and the counter-rotating of oxygen lance drive motors promotes oxygen lance, and the operative employee is handling failure in time, avoids the accident generation.
Preferred version as the utility model; In the control loop of said oxygen lance drive motors, keep the coil of pattern contactor, high heat pattern contactor, low heat pattern contactor, cut mode contactor, soft blow oxygen pattern contactor and high oxygen blast pattern contactor parallel with one another; The button of this pattern is connected with the normally closed interlock of other pattern contactors each other in the wire loop of above-mentioned each pattern contactor.The button of this pattern is connected with the normally closed interlock of other pattern contactors each other in the wire loop of each pattern contactor, has realized interlocking, and for example the cut mode button is pressed; The coil of cut mode contactor gets; Its normally closed interlock breaks off and makes the coil of other pattern contactors all keep power failure state, and intermediate frequency furnace can be worked under cut mode, and another mode button is pressed; The coil of cut mode contactor is with dead electricity, by that analogy.
As the further preferred version of the utility model; Also comprise S7-200 type PLC controller in the control loop of said oxygen lance drive motors, the normally open contact of said maintenance pattern contactor, high heat pattern contactor, low heat pattern contactor, cut mode contactor, soft blow oxygen pattern contactor and high oxygen blast pattern contactor inserts i00 ~ i0.5 input of said PLC successively; Said main oxygen flowmeter, take into account aiw0, aiw2 and the aiw4 input that inserts said PLC around the signal output part of gas meter successively around oxygen flow; The aqw0 of said PLC, aqw2 and aqw4 output are respectively with said main oxygen control valve, be connected around oxygen regulating valve and around the signal input part of gas control valve.The normally open contact of maintenance pattern contactor, high heat pattern contactor, low heat pattern contactor, cut mode contactor, soft blow oxygen pattern contactor and high oxygen blast pattern contactor inserts i00 ~ i0.5 input of PLC successively; The coil of some pattern contactors gets; Corresponding normally open contact is closed; PLC can receive this signal; In conjunction with the main oxygen flowmeter, take into account the in good time signal around gas meter around oxygen flow, PLC can control the main oxygen control valve, around oxygen regulating valve and around the aperture of gas control valve, works under this pattern to keep intermediate frequency furnace.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation, accompanying drawing only provides reference and explanation usefulness, and is non-in order to restriction the utility model.
Fig. 1 is the front view of a kind of quick melting intermediate frequency furnace of the utility model.
Fig. 2 be among Fig. 1 local A to zoomed-in view.
Fig. 3 is the structural representation of oxygen lance in the utility model.
Fig. 4 is an oxygen gas valve station schematic diagram in the utility model.
Fig. 5 is the major loop figure of oxygen lance drive motors in the utility model.
Fig. 6 is the control loop figure one of a kind of quick melting intermediate frequency furnace of the utility model.
Fig. 7 is the control loop figure two of a kind of quick melting intermediate frequency furnace of the utility model.
Among the figure: 1 bell; 2 blower fans; 3 supports; 4 cat ladders; 5 vertical guide rails; 6 lift carts; The 6a roller; 7 intermediate frequency furnace oxygen lances; 7a main oxygen inlet; 7a ' main oxygen spray orifice; 7b is around oxygen intake; 7b ' is around the oxygen spray orifice; 7c is around fuel gas inlet; 7c ' is around gas jet orifice; The 7d water inlet; 7d ' water return outlet; 8 oxygen lance drive motors; 9 lower sprockets; 10 upper sprocket wheels; 11 chains; 12 guiding are scraped the slag tube; 13 tension detecting apparatus; The 14a inlet gage; The 14b pressure transmitter; The 14c stop valve of intaking; The 14d repid cut-off valve of intaking; 14e return water temperature table; 14f cooling water flow meter; 14g backwater stop valve; 15a is around the gas source Pressure gauge; 15b is around the gaseous-pressure transmitter; 15c is around gas shutoff valve; 15d is around gas meter; 15e is around gas control valve; 15f is around the gas supply Pressure gauge; 15g is around the combustion gas check-valves; 15h is around the combustion gas repid cut-off valve; 16a is around the oxygen source Pressure gauge; 16b is around the oxygen pressure transmitter; 16c is around the oxygen stop valve; 16d is around oxygen flow meter; 16e is around oxygen regulating valve; 16f is around oxygen supply gas pressure table; 16g is around the oxygen check-valves; 16h is around the oxygen repid cut-off valve; 17a main oxygen bleed pressure table; 17b main oxygen pressure transmitter; 17c main oxygen stop valve; 17d main oxygen flowmeter; 17e main oxygen control valve; 17f main oxygen supply gas pressure table; 17g main oxygen check-valves; 17h main oxygen repid cut-off valve; SB1 keeps mode button; The high heat pattern button of SB2; SB3 low-heat mode button; SB4 cut mode button; SB5 soft blow oxygen mode button; The high oxygen blast mode button of SB6; SB7 oxygen lance decline button; The SB8 oxygen lance promotes button; SB9 master operating station button; SB10 maintenance operation platform button; K1 keeps the pattern contactor; The high heat pattern contactor of K2; K3 hangs down the heat pattern contactor; K4 cut mode contactor; K5 soft blow oxygen pattern contactor; The high oxygen blast pattern of K6 contactor; KA2 master operating station contactor; KA3 maintenance operation platform contactor; 11QF oxygen lance decline switch; KM1 oxygen lance decline contactor; The 21QF oxygen lance promotes switch; The KM2 oxygen lance promotes contactor; S1 oxygen lance drive motors speed regulator; The SQ3 oxygen lance weightless position switch that leaks; The overheated temperature-sensitive button of FR backwater.
The specific embodiment
Like Fig. 1 and shown in Figure 2, a kind of quick melting intermediate frequency furnace of the utility model, the intermediate frequency furnace top is provided with bell 1; Bell 1 top is provided with blower fan 2, support 3 and cat ladder 4; Vertical guide rail 5 and lift cart 6 are installed on the support 3, and lift cart 6 is supported on the vertical guide rail 5 through roller 6a and can moves up and down along vertical guide rail, and the upper end of vertical guide rail 5 is equipped with upper sprocket wheel 10; The vertical guide rail lower end is equipped with lower sprocket 9; Upper sprocket wheel 10 is in transmission connection through chain 11 with lower sprocket 9, and an end of chain 11 is connected the top of lift cart, and the other end of chain 11 is connected the bottom of lift cart; Be fixed with intermediate frequency furnace oxygen lance 7 on the lift cart, the rifle head of intermediate frequency furnace oxygen lance 7 inserts the intermediate frequency furnace along the bell axis normal from the top of bell.Oxygen lance drive motors 8 drives lower sprocket 9 through reduction box and gear train and rotates, and lower sprocket 9 drives upper sprocket wheel 10 through chain 11 and rotates, and chain 11 pulling lift carts 6 move up and down along vertical guide rail 5 simultaneously, realize the up-down of intermediate frequency furnace oxygen lance 7.
The top center of bell 1 is provided with the guiding of bell coaxial line and scrapes slag tube 12; Guiding is scraped the big up and small down awl tubular of slag tube 12; The barral of a gun of intermediate frequency furnace oxygen lance 7 passes port and the lower port that guiding is scraped slag tube 12 successively, and it is suitable that guiding is scraped the barral of a gun diameter of lower port internal diameter and intermediate frequency furnace oxygen lance 7 of slag tube 12.When intermediate frequency furnace oxygen lance 7 moved up and down, guiding was scraped the lower port of slag tube 12 and can be removed dregs bonding on the barral of a gun.
As shown in Figure 3; The upper end of intermediate frequency furnace oxygen lance 7 is provided with main oxygen inlet 7a, around oxygen intake 7b, around fuel gas inlet 7c, water inlet 7d and water return outlet 7d ', the end face center of intermediate frequency furnace oxygen lance 7 lower end rifle heads is provided with the main oxygen spray orifice 7a ' that is communicated with main oxygen inlet 7a; The periphery of main oxygen spray orifice 7a ' be evenly distributed with a plurality of respectively be communicated with around fuel gas inlet 7c around gas jet orifice 7c '; Around the periphery of gas jet orifice 7c ' be evenly distributed with a plurality of respectively be communicated with around oxygen intake 7b around oxygen spray orifice 7b '; Be provided with the cooling water runner in the barral of a gun of intermediate frequency furnace oxygen lance 7, the cooling water runner extends along the overall length direction of barral of a gun, and its two ends link to each other with water inlet 7d and water return outlet 7d ' respectively, so that oxygen lance is cooled off, prolong its service life.
As shown in Figure 4; Be in series with main oxygen bleed pressure table 17a, main oxygen pressure transmitter 17b, main oxygen stop valve 17c, main oxygen flowmeter 17d, main oxygen control valve 17e, main oxygen supply gas pressure table 17f, main oxygen check-valves 17g and main oxygen repid cut-off valve 17h on the main oxygen pipeline successively, the outlet of main oxygen repid cut-off valve 17h inserts the main oxygen inlet 7a of oxygen lance.
Around being in series with successively on the oxygen pipeline around oxygen source Pressure gauge 16a, around oxygen pressure transmitter 16b, around oxygen stop valve 16c, around oxygen flow meter 16d, around oxygen regulating valve 16e, around oxygen supply gas pressure table 16f, around oxygen check-valves 16g with around oxygen repid cut-off valve 16h, around the outlet of oxygen repid cut-off valve 16h insert oxygen lance around oxygen intake 7b.
Around being in series with successively on the fuel gas pipeline around gas source Pressure gauge 15a, around gaseous-pressure transmitter 15b, around gas shutoff valve 15c, around gas meter 15d, around gas control valve 15e, around gas supply Pressure gauge 15f, around combustion gas check-valves 15g with around combustion gas repid cut-off valve 15h, around the outlet of combustion gas repid cut-off valve 15h insert oxygen lance around fuel gas inlet 7c.
Be in series with inlet gage 14a, pressure transmitter 14b, water inlet stop valve 14c and water inlet repid cut-off valve 14d on the cooling water inlet pipe road successively, the outlet of water inlet repid cut-off valve 14d inserts the water inlet 7d of oxygen lance; The water return outlet 7d ' of oxygen lance is in series with return water temperature table 14e, cooling water flow meter 14f and backwater stop valve 14g successively, and the outlet of backwater stop valve 14g inserts the CWR road.
As shown in Figure 5, the major loop of oxygen lance drive motors 8 comprises the counter-rotating loop that just goes back to the road and oxygen lance is promoted that oxygen lance is descended.Just going back in the road, oxygen lance drive motors 8 is connected with power supply through normally open contact, the oxygen lance decline switch 11QF of oxygen lance decline contactor.In the counter-rotating loop, oxygen lance drive motors 8 is connected with power supply through normally open contact, the oxygen lance lifting switch 21QF that oxygen lance promotes contactor.
As shown in Figure 6, in the control loop of oxygen lance drive motors 8, after the normally closed interlock that oxygen lance decline button SB7 and oxygen lance promote contactor KM2 is connected, connect again with the coil of oxygen lance decline contactor KM1.SB7 presses when oxygen lance decline button, and the coil of oxygen lance decline contactor KM1 gets electric, and the normally open contact of oxygen lance decline contactor KM1 is closed, and oxygen lance drive motors 8 is just changeing descends oxygen lance;
Oxygen lance promotes button SB8 and oxygen lance weightless position switch SQ3 and the overheated temperature-sensitive button F of the backwater R back that is connected in parallel that leaks and connects with the coil of oxygen lance lifting contactor KM2.Promote button SB8 when pressing oxygen lance; Perhaps tension detecting apparatus 13 detects oxygen lance to trigger the oxygen lance weightless position switch SQ3 that leaks when weightless closed, perhaps when the water temperature of oxygen lance water return outlet surpasses setting value, during the overheated temperature-sensitive button F of backwater R action closure; The coil that oxygen lance promotes contactor gets; The normally closed interlock that oxygen lance promotes contactor breaks off the coil losing electricity that makes oxygen lance decline contactor KM2, and oxygen lance promotes the normally open contact closure of contactor KM2 simultaneously, and 8 counter-rotatings of oxygen lance drive motors promote oxygen lance; The operative employee is handling failure in time, avoids accident to take place.
After connecting with the break contact of maintenance operation platform button SB10, the moving together contact of master operating station button SB9 connects with the coil of master operating station contactor KA2.After connecting with the break contact of master operating station button SB9, the moving together contact of maintenance operation platform button SB10 connects with the coil of maintenance operation platform contactor KA3.After master operating station button SB9 was pressed, the coil of master operating station contactor KA2 got electric, simultaneously the coil losing electricity of maintenance operation platform contactor KA3; After maintenance operation platform button SB10 was pressed, the coil of maintenance operation platform contactor KA3 got electric, simultaneously the coil losing electricity of master operating station contactor KA2; Master operating station and maintenance operation platform are realized interlocking thus, avoid maloperation to lead to a disaster.
In the control loop of oxygen lance drive motors 8, keep the coil of pattern contactor K1, high heat pattern contactor K2, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5 and high oxygen blast pattern contactor K6 parallel with one another.
In the wire loop that keeps pattern contactor K1; Connect with keeping mode button SB1 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock of high heat pattern contactor K2, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5, high oxygen blast pattern contactor K6 successively again, connect with the coil that keeps pattern contactor K1 then.
In the wire loop of high heat pattern contactor K2; Connect with high heat pattern button SB2 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock that keeps pattern contactor K1, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5, high oxygen blast pattern contactor K6 successively again, connect with the coil of high heat pattern contactor K2 then.
In the wire loop of low heat pattern contactor K3; Connect with low-heat mode button SB3 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock that keeps pattern contactor K1, high heat pattern contactor K2, cut mode contactor K4, soft blow oxygen pattern contactor K5, high oxygen blast pattern contactor K6 successively again, connect with the coil of low heat pattern contactor K3 then.
In the wire loop of cut mode contactor K4; Connect with cut mode button SB4 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock that keeps pattern contactor K1, high heat pattern contactor K2, low heat pattern contactor K3, soft blow oxygen pattern contactor K5, high oxygen blast pattern contactor K6 successively again, connect with the coil of cut mode contactor K4 then.
In the wire loop of soft blow oxygen pattern contactor K5; Connect with soft blow oxygen mode button SB5 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock that keeps pattern contactor K1, high heat pattern contactor K2, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5, high oxygen blast pattern contactor K6 successively again, connect with the coil of soft blow oxygen pattern contactor K5 then.
In the wire loop of high oxygen blast pattern contactor K6; Connect with high oxygen blast mode button SB6 after the normally open contact parallel connection of the normally open contact of master operating station contactor KA2 and maintenance operation platform contactor KA3; Connect with the normally closed interlock that keeps pattern contactor K1, high heat pattern contactor K2, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5 successively again, connect with the coil of high oxygen blast pattern contactor K6 then.
More than in the wire loop of each pattern contactor the button of this pattern connect each other with the normally closed interlock of other pattern contactors, realized interlocking, for example cut mode button SB4 is pressed; The coil of cut mode contactor K4 gets; Its normally closed interlock breaks off and makes the coil of other pattern contactors all keep power failure state, and intermediate frequency furnace can be worked under cut mode, and another mode button is pressed; The coil of cut mode contactor K4 is with dead electricity, by that analogy.
As shown in Figure 7; The S7-200 type PLC controller that also comprises the electric production of Siemens in the control loop of oxygen lance drive motors 8, the normally open contact of maintenance pattern contactor K1, high heat pattern contactor K2, low heat pattern contactor K3, cut mode contactor K4, soft blow oxygen pattern contactor K5 and high oxygen blast pattern contactor K6 inserts i0.0 ~ i0.5 input of PLC successively; Main oxygen flowmeter 17d, insert aiw0, aiw2 and the aiw4 input of PLC successively around oxygen flow meter 16d and around the signal output part of gas meter 15d; The aqw0 of PLC, aqw2, aqw4 and aqw6 output respectively with main oxygen control valve 17e, around oxygen regulating valve 16e, be connected around the signal input part of gas control valve 15e and oxygen lance drive motors speed regulator S1.
When keeping mode button SB1 to be pressed; The coil of maintenance pattern contactor K1 gets; The normally open contact closure of maintenance pattern contactor K1 gets the i0.0 input of PLC; PLC control main oxygen control valve 17e, around oxygen regulating valve 16e and all be in minimum aperture state around gas control valve 15e, prevent that oxygen lance from blocking up rifle.
When high heat pattern button SB2 is pressed; The coil of high heat pattern contactor K2 gets; The normally open contact closure of high heat pattern contactor K2 gets the i0.1 input of PLC; PLC control main oxygen control valve 17e is in little aperture state, makes around oxygen regulating valve 16e simultaneously and is in big aperture state around gas control valve 15e, and this moment, oxygen lance melted metalwork in the stove.
SB3 is pressed when the low-heat mode button; The coil of low heat pattern contactor K3 gets; The normally open contact closure of low heat pattern contactor K3 gets the i0.2 input of PLC; PLC control main oxygen control valve 17e, around oxygen regulating valve 16e and all be in little aperture state around gas control valve 15e, this moment, oxygen lance carried out preheating to metalwork in the stove.
SB4 is pressed when the cut mode button; The coil of cut mode contactor K4 gets; It is electric that the normally open contact closure of cut mode contactor K4 gets the i0.3 input of PLC, and PLC control main oxygen control valve 17e is in minimum aperture state, and control loop reaches the aperture around gas control valve 15e around oxygen regulating valve 16e; Make around combustion gas be 1:2 around the flow-rate ratio of oxygen, this moment, oxygen lance cut metalwork in the stove.
SB5 is pressed when soft blow oxygen mode button; The coil of soft blow oxygen pattern contactor K5 gets; It is electric that the normally open contact closure of soft blow oxygen pattern contactor K5 gets the i0.4 input of PLC, and PLC control main oxygen control valve 17e is in big aperture state, makes main oxygen be in inferior supersonic speed state and blows out; Control loop reaches around oxygen regulating valve 16e and all is in little aperture state around gas control valve 15e simultaneously, and this moment, oxygen lance carried out slag making, stirring to molten iron in the stove.
When high oxygen blast mode button SB6 is pressed; The coil of high oxygen blast pattern contactor K6 gets; It is electric that the normally open contact closure of high oxygen blast pattern contactor K6 gets the i0.5 input of PLC, and PLC control main oxygen control valve 17e is in the maximum opening state, makes main oxygen be in the supersonic speed state and blows out; Control loop reaches around oxygen regulating valve 16e and all is in little aperture state around gas control valve 15e simultaneously, and this moment, oxygen lance took off slag to molten iron in the stove.
Reach the integrated orifice flowmeter of LGBK-25 that preferably adopts Yokogawa river, Chongqing appearance Co., Ltd to produce around oxygen flow meter 16d around gas meter 15d, the integrated orifice flowmeter of LGBK-50 that main oxygen flowmeter 17d preferably adopts Yokogawa river, Chongqing appearance Co., Ltd to produce.Reach the ZMAP-16P DN25 pneumatic diaphragm control valve that preferably adopts the Co., Ltd's production already of the huge good valve in Shanghai around oxygen regulating valve 16e around gas control valve 15e, main oxygen control valve 17e preferably adopts the ZMAP-16P DN50 pneumatic diaphragm control valve of the huge good valve in Shanghai Co., Ltd's production already.
The above is merely the preferable possible embodiments of the utility model, non-so the limitation the utility model scope of patent protection.Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (10)
1. quick melting intermediate frequency furnace; The intermediate frequency furnace top is provided with bell, and the bell top is provided with support, it is characterized in that: vertical guide rail and lift cart are installed on the said support; Said lift cart is supported on the vertical guide rail through roller and can moves up and down along vertical guide rail; Said vertical guide rail upper end is equipped with upper sprocket wheel, and said vertical guide rail lower end is equipped with lower sprocket, and said upper sprocket wheel is connected through chain drive with lower sprocket; One end of said chain is connected the top of said lift cart, and the other end of said chain is connected the bottom of said lift cart; Be fixed with the intermediate frequency furnace oxygen lance on the said lift cart, the rifle head of said intermediate frequency furnace oxygen lance inserts the intermediate frequency furnace along the bell axis normal from the top of said bell.
2. a kind of quick melting intermediate frequency furnace according to claim 1; It is characterized in that: the upper end of said intermediate frequency furnace oxygen lance is provided with main oxygen inlet, around oxygen intake, around fuel gas inlet, water inlet and water return outlet, and the end face center of said intermediate frequency furnace oxygen lance lower end rifle head is provided with the main oxygen spray orifice that is communicated with the main oxygen inlet; The periphery of said main oxygen spray orifice be evenly distributed with a plurality of respectively be communicated with around fuel gas inlet around gas jet orifice; Said periphery around gas jet orifice be evenly distributed with a plurality of respectively be communicated with around oxygen intake around the oxygen spray orifice; Be provided with the cooling water runner in the barral of a gun of said intermediate frequency furnace oxygen lance, the two ends of said cooling water runner link to each other with said water inlet and water return outlet respectively.
3. a kind of quick melting intermediate frequency furnace according to claim 1; It is characterized in that: the top center of said bell is provided with the guiding of bell coaxial line and scrapes the slag tube; Said guiding is scraped the big up and small down awl tubular of slag tube; The barral of a gun of said intermediate frequency furnace oxygen lance passes port and the lower port that said guiding is scraped the slag tube successively, and it is suitable that said guiding is scraped the barral of a gun diameter of lower port internal diameter and said intermediate frequency furnace oxygen lance of slag tube.
4. a kind of quick melting intermediate frequency furnace according to claim 1, it is characterized in that: said upper sprocket wheel is installed on the cochain wheel shaft, and the two ends of said cochain wheel shaft are fixed on the said support through tension detecting apparatus.
5. a kind of quick melting intermediate frequency furnace according to claim 1; It is characterized in that: be in series with main oxygen stop valve, main oxygen flowmeter, main oxygen control valve, main oxygen check-valves and main oxygen repid cut-off valve on the main oxygen pipeline successively, the outlet of said main oxygen repid cut-off valve inserts the main oxygen inlet of said oxygen lance; Around being in series with successively on the oxygen pipeline around the oxygen stop valve, around oxygen flow meter, around oxygen regulating valve, around oxygen check-valves and around the oxygen repid cut-off valve, said outlet around the oxygen repid cut-off valve insert said oxygen lance around oxygen intake; Around being in series with successively on the fuel gas pipeline around gas shutoff valve, around gas meter, around gas control valve, around combustion gas check-valves and around the combustion gas repid cut-off valve, said outlet around the combustion gas repid cut-off valve insert said oxygen lance around fuel gas inlet; Be in series with into water stop valve and water inlet repid cut-off valve on the cooling water inlet pipe road successively, the outlet of said water inlet repid cut-off valve inserts the water inlet of said oxygen lance; The water return outlet of said oxygen lance is in series with the return water temperature table successively, cooling water flow is taken into account the backwater stop valve, and the outlet of said backwater stop valve inserts the CWR road.
6. a kind of quick melting intermediate frequency furnace according to claim 1; It is characterized in that: the major loop of said oxygen lance drive motors comprises the counter-rotating loop that just goes back to the road and oxygen lance is promoted that oxygen lance is descended; Said just going back in the road, the oxygen lance drive motors is connected with power supply through the normally open contact of oxygen lance decline contactor; In the said counter-rotating loop, the oxygen lance drive motors is connected with power supply through the normally open contact that oxygen lance promotes contactor; In the control loop of said oxygen lance drive motors, after the normally closed interlock that oxygen lance decline button and said oxygen lance promote contactor is connected, connect again with the coil of said oxygen lance decline contactor.
7. a kind of quick melting intermediate frequency furnace according to claim 6; It is characterized in that: in the control loop of said oxygen lance drive motors; Oxygen lance promotes button and the oxygen lance weightless position switch back that is connected in parallel that leaks and connects with the coil that said oxygen lance promotes contactor, and said tension detecting apparatus triggers the said oxygen lance weightless position switch closure of leaking when detecting oxygen lance weightlessness.
8. a kind of quick melting intermediate frequency furnace according to claim 7; It is characterized in that: the overheated temperature-sensitive button of backwater is connected in parallel afterwards with said oxygen lance lifting button and the coil of said oxygen lance lifting contactor is connected; When the water temperature of said oxygen lance water return outlet surpassed setting value, the overheated temperature-sensitive button actions of said backwater was closed.
9. according to claim 1 or 5 described a kind of quick melting intermediate frequency furnaces; It is characterized in that: in the control loop of said oxygen lance drive motors, keep the coil of pattern contactor, high heat pattern contactor, low heat pattern contactor, cut mode contactor, soft blow oxygen pattern contactor and high oxygen blast pattern contactor parallel with one another; The button of this pattern is connected with the normally closed interlock of other pattern contactors each other in the wire loop of above-mentioned each pattern contactor.
10. a kind of quick melting intermediate frequency furnace according to claim 9; It is characterized in that: also comprise S7-200 type PLC controller in the control loop of said oxygen lance drive motors, the normally open contact of said maintenance pattern contactor, high heat pattern contactor, low heat pattern contactor, cut mode contactor, soft blow oxygen pattern contactor and high oxygen blast pattern contactor inserts i00 ~ i0.5 input of said PLC successively; Said main oxygen flowmeter, take into account aiw0, aiw2 and the aiw4 input that inserts said PLC around the signal output part of gas meter successively around oxygen flow; The aqw0 of said PLC, aqw2 and aqw4 output are respectively with said main oxygen control valve, be connected around oxygen regulating valve and around the signal input part of gas control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200401041U CN202452830U (en) | 2012-02-08 | 2012-02-08 | Rapid smelting intermediate frequency furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200401041U CN202452830U (en) | 2012-02-08 | 2012-02-08 | Rapid smelting intermediate frequency furnace |
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| CN202452830U true CN202452830U (en) | 2012-09-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256817A (en) * | 2013-05-23 | 2013-08-21 | 中山市意利克机械设备有限公司 | Feeding device for aluminum bar heating furnace |
| CN104551335A (en) * | 2015-01-12 | 2015-04-29 | 杭州和泰机电工业有限公司 | Automatic flame cutting equipment for side plates of chain |
-
2012
- 2012-02-08 CN CN2012200401041U patent/CN202452830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256817A (en) * | 2013-05-23 | 2013-08-21 | 中山市意利克机械设备有限公司 | Feeding device for aluminum bar heating furnace |
| CN104551335A (en) * | 2015-01-12 | 2015-04-29 | 杭州和泰机电工业有限公司 | Automatic flame cutting equipment for side plates of chain |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20180208 |