CN85102672A - The new type mechanical device of blast furnace roof material distributing - Google Patents
The new type mechanical device of blast furnace roof material distributing Download PDFInfo
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- CN85102672A CN85102672A CN198585102672A CN85102672A CN85102672A CN 85102672 A CN85102672 A CN 85102672A CN 198585102672 A CN198585102672 A CN 198585102672A CN 85102672 A CN85102672 A CN 85102672A CN 85102672 A CN85102672 A CN 85102672A
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Abstract
The present invention is a kind of new type mechanical device of blast furnace roof material distributing.By rotation distributor chute cloth in stove.Distributor chute is suspended on the chute axle, and the chute axle is supported on the distributor rotator, when rotator rotates, also drives the chute rotation.The actuating unit that drives the chute rotation is outside stove and be installed on the rotator, and the power supply of actuating unit is supplied with by electric slide channel.Adopt reliable mechanical seal or compound seal between distributor rotator and the adjacent static position.
Description
Affiliated technical field:
The present invention is the design of blast furnace roof material distributing equipment in the ironmaking mechanical field.
Technical background:
The development of iron-smelting process constantly confirms: coal gas distributions in the stove is being arranged in the distribution of furnace roof raw material in blast furnace operating.To a great extent operational stage and the blast furnace cooling stave life-span played the major decision influence.Therefore reliability, stopping property, working life and the economy that distributes in stove by people's requirement control furnace charge and improve whole distribution device become smelts iron one of most significant problems in the mechanical industry.
A kind of two clock appliance arrangements that have the distributor of rotation of Aermacchi's development of Cleveland, Ohio, USA river in 1907 obtain to use widely on blast furnace.To the sixties in this century, this top charging equipment has almost captured the furnace roof of all blast furnaces of the whole world.
To inner each the production link mutual relationship of sixties iron and steel enterprise become very tight.The stability of blast furnace production becomes more and more important, and is especially having only under one or two blast furnace limited production situations, and accident and overhaul blowing out damping down are producing tremendous influence to the business economic benefit.Therefore, the normal operation of ironmaking equipment and blast furnace campaign are even more important.Now, the Japanese blast furnace generation life-span extended to 10 years by 5～six years, repaiied in the middle nothing.Particularly with the development of Iron industry, people are clear to be recognized blast furnace operating and improves roof material distributing, huge technology and economic worth in ironmaking is produced.
Under these circumstances, to also having higher requirement in stopping property, cloth and the work-ing life of furnace roof equipment.
For satisfying this requirement, people have carried out many improvement on the basis of Ma Jishi furnace roof in the past few decades, for example: pile-up welding hard alloy on big or small clock trim, the size clock is adopted the two-fold angle, carry out water-cooled on the trim, adopt the idle running distributor, adopt three Zhong Sizhong, adopt the reducing furnace throat, though these improvement obtain certain effect.But, still fundamentally do not overcome clock-type sealing and clock-type cloth institute inherent essence weakness.
Under these circumstances, Luxembourg Bao Er Wo Si companies in 1970 have proposed the no bell furnace roof design of a thorough revolution under presiding in the dish lattice, be called pW type furnace roof.
The principal character of pW type furnace roof is:
Replace the great bell cloth with the swivel chute cloth, replaced the clock-type sealing with cutting down the formula sealing.Its structure is, above furnace throat, adopted one can be around the chute of blast furnace medullary ray rotation, the tilt adjustable of chute is moving.There is one directly over the chute, rotation of control chute and the epicyclic gearbox of swinging.Because the furnace roof inside of wheel casing and the many dirt of high temperature is UNICOMs.Therefore, continuously inflate cooling by nitrogen or purified gas, cooling gas by wheel casing in air gap enters stove, thereby prevent that also dust-laden coal gas enters wheel casing in the stove.The wheel casing center is one section center trunnion from the furnace roof batch can to chute that failed material by.Two feed bins charging and discharging are by turns arranged on the trunnion of center, and unlatching is cut down in sealing on feed bin, and lower seal cuts down when closing, and then is in state of charge.When sealing to cut down, going up of feed bin close.Lower seal cuts down when opening, and then is in the discharging state, and feed bin needed pressure release and pressurising when the switch sealing was cut down.For the protection lower seal cuts down and regulate materials flow speed, be provided with throttling and cut down.
PW type furnace roof is than clock-type furnace roof advanced person.Thereby, obtain development comparatively rapidly, but this Lu Ding And is non-very perfect, also has some weakness.Therefore limited its popularization.These main weakness are:
1) working cost height
Airtight wheel casing is the heart of pW type furnace roof, for guaranteeing its normal operation, gear the temperature inside the box must be controlled at 32～46 ℃, and general blast furnace throat temperature is all at 200～400 ℃, the furnace top pressure fluctuation is bigger, in this case, pinion the temperature inside the box just must feed a large amount of nitrogen or clean pathogenic dryness to wheel casing.Its consumption is generally at 4,000～7000 cubic metres/hour, if adopt nitrogen cold, the pW furnace roof just must consume more expensive nitrogen.If adopt the purified gas cooling, just must set up the coal gas pressurizing point.The pressurizing point power consumption is generally 30～50 Bei ， And of equal heat size clock-type furnace roof and owing to the coal gas dust-laden, the press wearing and tearing are very fast, and the annual nitrogen expense of pW type furnace roof is about 500,000 yuan.
2) cause the blast furnace gas dilution:
At present, pW type furnace roof generally adopts the nitrogen cooling both at home and abroad.A large amount of nitrogen enters blast furnace by the gear roller box through air gap, has reduced the concentration of CO in the blast furnace gas.And at present owing to the decline of ironmaking coke ratio and the improvement of coal gas utilization, the calorific value of blast furnace gas generally all has only 900～800 kilocalories/meter
3With 300 meters
3Blast furnace is an example, if adopt pW type furnace roof to carry out the nitrogen cooling, the blast furnace gas theoretical combustion temperature will descend 100～70 ℃.
3) investment is higher
The general clock-type furnace roof expense with equal heat size of the expense of pW type furnace roof itself is close.But the expense of pW type furnace roof necessary nitrogen supply (NS) system or gas pressure system is just than higher.With 300m
3Blast furnace is an example, and the investment of pW type stock gas pressurizing point just reaches 30～500,000 yuan.
4) wheel casing maintenance and repair difficulty
Wheel casing is under the sealed shape, checks and repair necessary damping down, causes certain difficulty so just for maintenance work and safe operation.
Because above-mentioned weakness, limited greatly pW type furnace roof popularization, particularly on medium and small blast furnace, use.
In this respect, elder brother's steel also once improved at the above-mentioned weakness of pW type furnace roof.The simple and easy no clock furnace roof of No. two stoves of elder brother's steel is exactly an example of this trial.This furnace roof has been cancelled the epicyclic gearbox of pW type furnace roof, and chute is suspended on the similar master wheel of Ma Jishi furnace roof, by the rotation of master wheel, realizes the chute rotation, uses the suspension rod that is installed on the master wheel to change the inclination angle of chute.The sealing of distributor rotating part and stationary part is to adopt the face seal of charcoal fiber end.
No. two stove furnace roofs of elder brother's steel main weakness is:
1) in the chute incidence regulating mechanism, suspension rod sealing difficulty.Particularly on the higher blast furnace of roof pressure, this sealing is unreliable.
2) the chute inclination angle will be when out of service, just can not only labour intensity is big by regulating this manually.Operate dangerously, and can't realize many ring screw distributions, limited the handiness of chute cloth.
3) the charcoal fibrous ring does not have cooling and lubricated, and the life-span is shorter, And and because friction is decreased merit is big, heating is big, limited the chute speed of rotation, thereby the cloth number of plies is few, cloth evenness is poor.
4) the wear ring floatability is poor, has influenced stopping property.
5) this blast furnace furnace roof can not adopt hot ore deposit material loading.
The purpose and the task of invention
The specific purposes and the task of invention are:
Invention one cover has a good seal performance, and the cloth performance, adaptive faculty is strong, cost is low, working cost is few, the life-span is long, be easy to the distributor making and keep in repair.
Design principle, constitutional features, principle of work and the salient features of invention.
1), the overall structure of novel furnace roof
Novel blast-furnace top distributing device can be illustrated by figure (), it by furnace roof hopper (1), go up sealing and cut down that (15) are cut down in (2), batch can (11), throttling, lower seal cuts down (16), distributor chute (20) and transmission (21) (22) thereof and tightness system (3) (5) formation.
The course of action of novel furnace top distributing gear is: when the distributor when filling with substance, last sealing is cut down (2) and is opened, and throttling is cut down (15) and cut down (16) with lower seal and close.At this moment distributor is in state of charge.Furnace charge is discharged into batch can (11) from furnace roof hopper (1).After charging finished, last sealing was cut down (2) and is closed, and opened successively that lower seal cuts down (16) and throttling is cut down (15) chute (20) and also begun to rotate.At this moment distributor is in the discharging state, and the interior furnace charge of batch can (11) cuts down (15) through throttling, and lower seal cuts down (16) and center trunnion (17) arrives the chute (20) that is rotating, and is distributed in the stove by production requirement by chute.
This novel distributor, chute oblique angle (horizontal angle) can be in the variation between 45～90 °, and the chute speed of rotation can reach 30 rev/mins, and chute can be swung in the time of rotation.This distributor can be finished the chute cloth of variety of ways such as many rings, spiral, fan-shaped, fixed point.
2): the explanation of the main position of novel furnace top distributing gear structure
(1) material-feeding mechanism
Among the present invention whole material-feeding mechanism can be by figure one, figure two, figure three, figure four, be illustrated.Figure two, three, four, be three kinds of different material-feeding mechanisms.But, they have a common feature, explanation during this feature please referring to figure two, chute (6) hangs on the chute axle (13), the tightness system (12) that chute axle (13) passes on the sealing bore is supported on the bearing (10) that is positioned at stove and is installed in the canine tooth wheel disc outward, is equipped with to drive the power set that the chute axle rotates on master wheel (8) dish.Because chute axle (13) driving torque is big, corner is little, so power set is by motor (15)-worm reducer (17)-spiral thrust device (11)-crank arm (24), and system constitutes.Motor during running (15) drives worm reducer (17), worm reducer (17) drives spiral thrust device silk and shoulders (20) rotation, thereby make spiral thrust device (11) produce horizontal push-pull effort, this push-pull effort drives chute axle (13) or (25) rotation by crank arm (24), has so just realized the swing of chute.The outer position of chute axle stove is provided with stop means, surpasses tolerance band to prevent the chute swing.In addition, also be provided with whole angle mechanism on the canine tooth wheel disc (8), it and chute axle are got in touch, and whole like this angle machine can become electric signal with the inclination angle of chute at any time, and (Fig. 1-18) passes to operation room through electric slide channel.The motor power that drives the chute swing is by electric slide channel (Fig. 1-18) input, and electric slide channel is fixed on the stationary parts of canine tooth wheel disc top.It is little, in light weight that this cover drives chute oscillation system volume, can be installed on the canine tooth wheel disc fully.
The chute rotating mechanism is supported on the master wheel (23) referring to figure one, chute (20) and chute axle (2), master wheel (23) is by one group of carrying roller (9) retaining roller (8) and pressure roller (6) supporting and centering, the master wheel rotation is to be driven by motor (27) one step-down gears (26) one umbrella gear box (25) one pinion(gear)s (24) that are installed on the throat platform, motor is a buncher, and the rotating speed of master wheel can require to regulate according to cloth.When master wheel rotates, be supported on the also companion rotation of chute (20) on the canine tooth wheel disc.
It more than is exactly novel material-feeding mechanism essential characteristic.
On chute axle mounting means three kinds of forms can be arranged, the planner can make mounting condition and the experience of oneself according to the actual conditions of blast furnace, selects.
First kind of form is shown in figure two, and this formal, chute axle (13) is near a side of center trunnion (1).Its advantage is that manufacturing is easy for installation.The bearing maintenance condition is good, and it is higher to regulate the sensitivity of cloth radius.Bottom rotary seal (7) radius is less, and shortcoming is that chute axle (13) requires high temperature steel and necessary cooling.
Second kind of form is shown in figure three, chute axle (18) is two sections in this structure, by two bearings (2) (10) supporting that is installed in canine tooth wheel disc (1), axle is a cantilevered to the supporting of chute respectively, and the medullary ray of axle and center trunnion (4) medullary ray intersect.The advantage of this structure is: the material to axle is less demanding, and weakness is that the diameter of rotary sealing appts (27) down increases about sixth than first kind, and four bearings are installed difficulty with one heart.
The third form is shown in figure four, and the characteristics of this structure are, chute axle (6) is two sections, and an end bearing of every section axle is at center trunnion hypomere (5), and bearing adopts heat-resisting from moistening material.The other end is bearing in the bearing (30) (on 10 that is installed on the outer canine tooth wheel disc (8) of stove.Shaft centre line and trunnion medullary ray intersect, and the advantage of this structure is that the strained condition of axle is good than second kind of form.Shortcoming is: difficulty is installed, center trunnion head bearing maintenance difficult.
(2) distributor sealed structure.
Novel distributor has the rotary seal (referring to figure three) at four positions, and wherein two positions are the sealing between chute axle and the sealing bore (9), and other two positions are rotary seal (6) about distributor rotating part and the static position, (27).
In preceding two positions, because chute shaft diameter less (generally being not more than 150 millimeters) rotating speed very low (being generally 4 rev/mins), corner few (being generally 45 °) so this two positions adopt packing seal can realize reliable sealing.Here preferably adopt and have the lower soft graphite of thermotolerance, wear resistance, self-lubricity and frictional coefficient as filler.This soft graphite salient features sees the following form:
From above performance and domestic a large amount of practice, adopting the flexible graphite packing sealing at chute axle rotary seal position is fully reliably.
Stress between the center trunnion (6) of distributor rotating part top seal tube (figure five-17) and distributor stationary part below and master wheel (21) in the distributor rotating part and the rotary sealing appts (19) (7) between the roof support ring (25).Here stress the structure and the sealing reliability of this two positions rotary seal.
This tightness system can be by the figure slender acanthopanax with explanation.This sealed structure is to combine formation by independent mechanical seal or mechanical seal (7), (11) with piston ring mechanical seal (38) packing seal (9).Mechanical seal is the main body of this position sealing.
Mechanical seal means that mutual applying ， And on the bright and clean and straight surface of two sealing elements perpendicular to axis relatively rotates and constitutes the device of sealing.Because this sealing has that sealing property is reliable, spillage is little, long service life, the power consumption is few and do not need advantage such as often maintenance, and can satisfy the seal request of the production automation and high temperature, high pressure, high vacuum, high rotating speed, major diameter, various inflammable, explosive, abrasiveness medium, therefore, developed rapidly and application widely in departments such as chemical industry, oil, aviation, nuclear power, national defence.
For its reliability and superiority are described, the spy compares with also extensive so far its sealing property with the asbestos packing sealing with the Ma Jishi furnace roof.Following table is data from " chemical equipment machinery ".
The comparison of common fillers sealing and mechanical seal
This shows that mechanical seal adapts to the sealing under the furnace roof operating mode fully, the life-span of Ma Jishi furnace roof filler calculates that from last table the life-span of mechanical seal can reach more than 2～5 years under the furnace roof operating mode generally more than two months at present.
Mechanical seal is superior, yet the someone can intactly use this sealing on the furnace top distributing gear to live never.The present invention has created the primary condition of utilization mechanical seal at first by the transformation to the distributor entire structure.And then mechanical seal structure improved, thereby finish the utilization of mechanical seal on roof material distributing.
The most basic characteristics of mechanical seal are: first carries out sealing on parallel dinuclear end face.Second for guaranteeing the lubricated and cooling on the trim when two rings rotate relatively, and this also is that mechanical seal realizes long-lived primary condition constantly to protect a lubricating oil that circulates at the end face portion card, has designed following sealed structure according to these two basic characteristics.
Because the distributor rotating part is similar to the rotary seal structure up and down between stationary part, stresses the sealed structure between master wheel and the roof support ring here, referring to figure five and figure six.
Master wheel (5-21) drives the chuting system rotation when distributor is worked, roof support ring (25) is actionless, the sealing between these two parts be by with roof support ring on stationary ring (figure five-19) and the bright and clean and straight end face of rotating ring (figure five-three) that is installed on the master wheel fit and realize.For guaranteeing to be adjacent to, connect with one section corrugated tube (22) between stationary ring (19) and the roof support ring (25), the elasticity of corrugated tube (22) and regulating spring group (figure five-23) acting in conjunction is adjacent to rotating ring (3) and stationary ring (19).(figure five-27-37) can produce the thrust or the pulling force of different sizes to regulating spring, therefore by adjusting the position of the female spiral shell of regulating spring adjusted (29), just can control the face pressure on the dynamic and static ring, makes it reach optimum value.The elasticity of regulating spring and corrugated tube should be measured before installation.
For guaranteeing the lubricated and cooling of end face.A ring groove (figure six-9) is driven when the dynamic and static ring time-out of fitting in the position, footpath in the stationary ring end face, between two rings circular channel has just been arranged, the most handy partition of passage (figure six-10) half-and-half separately, lubricated oil content two-way enters circuit from stationary ring oil-in (figure six-11), and (figure six-12 flows out from the stationary ring oil outlet after 1/2nd garden loops of flowing through respectively.Effusive lubricating oil is through cooling, filtration, and pressurizeing is flowed into by the stationary ring oil-in again, has so just realized lubricated on the dynamic and static ring sealing face and cooling.Stablize pressure device and monitoring oil temperature in the oiling system in addition, the warning device of leakage of oil amount is strengthened the reliability of oiling system with this.Influence the lubricated and cooling of end face in order to prevent that oiling system from breaking down; On the one hand can establish long-pending fuel tank at furnace roof, when oiling system was out of order, the mechanical sealing surface oil extraction was cut down automatically and is closed, and long-pending fuel tank fuel feeding cuts down door and opens automatically, like this can be for a long time in the ring shaped oil passage can oil-break, thereby guaranteed lubricating of trim.Dynamic and static ring adopts the material with certain self-lubricity on the other hand.
The dynamic and static ring width can be selected 15～10 millimeters, width dimensions and wear ring diameter, and the dynamic and static ring material, factors such as gas temperature and pressure are relevant in the stove, and the planner can determine with reference to mechanical seal aspect pertinent data.
Take two measures in order to prevent that the outer dust of coal gas and stove enters trim in the stove.
First: studies confirm that in a large number, when the circular channel lubricating oil pressure surpasses pressure medium 0.5 kilograms per centimeter
2, just can prevent that outside solid grain from entering trim.In view of the above, lubrication pressure in the circuit is controlled at greater than stock gas pressure 0.5～1 kilograms per centimeter
2Scope in.
Second: increase by one packing seal (figure six-5) filler in the inboard of trim and can adopt the shape soft graphite that looses, this filler is in the non-oxidized gas medium, and working temperature can reach 1000 ℃, and frictional coefficient is asbestos packing 1/5th.Because the filler pressure at both sides equates that its life-span just can be fully guaranteed.This layer filler stops that solid particulate is near seal face in the coal gas.In addition, the outside at seal face, set up one piston ring mechanical seal (figure six-8) and (figure five-38) piston ring can adopt graphite or the spheroidal graphite cast iron with self-lubricity, piston ring and overcoat (figure six-1) together move, one group of little spring (figure five-2) compresses piston ring by spring lever (figure five-20) and pressure ring (figure five-10), guarantee the applying of piston ring end face and stationary ring water jacket end face, desirable 0.1～0.2 kilograms per centimeter of face pressure
2, this road piston ring mechanical seal prevents that the outer dust of stove is near seal face.
Like this, based on mechanical seal, piston ring mechanical seal and packing seal are assist three-layer sealed, have constituted reliable compound seal.
In the life-span of sealed structure, generally speaking, when rotating speed is 24 rev/mins, furnace pressure is 2 kilograms per centimeter
2, the dynamic and static ring face pressure is 3 kilograms per centimeter
2The time, if design is proper, the dynamic and static ring life-span can reach 4 years.When graphite annulus or spheroidal graphite cast iron were adopted in the piston ring mechanical seal, the life-span can reach 4～5 years.When compound seal damages, take integral body (dynamic and static ring corrugated tube) to change, the replacing time generally is no more than 10 hours.
Dynamic and static ring and piston ring processing technology are ripe at home, and present of home make dynamic and static ring and piston ring, the maximum diameter that is reached surpass 2.5 meters, and the maximum diameter of wear ring only is about 1.6 meters in this invention, and the piston ring maximum diameter is about 1.7 meters.Therefore, on manufacturing process, there is not the processing difficulties problem.
For the blast furnace of various heat sizes, the sealed diameter of this distributor is more or less the same, because sealed diameter depends primarily on the center throat pipe diameter, and the center throat pipe diameter mainly determines according to the furnace charge lumpiness.
(3) furnace roof batch can
The effect of furnace roof batch can is that furnace charge is accumulated after the some amount, and feed in stove, the volume of batch can must satisfy the needs that maximum charge advances dress simultaneously.
The quantity of batch can is two for the blast furnace of conveyor material loading, and corresponding upper-lower seal is cut down, throttling is cut down also is two covers, can rotate operation like this.
For the blast furnace of truck or batch can material loading, because per car material average out to pitch time more than seven minutes, during with the utmost dispatch material loading, is spaced apart 4 minutes, and the furnace roof batch can is put one jar of material needs about 90 seconds.Therefore for the batch can blowing time less than the truck material loading blast furnace of pitch time, preferably adopt single jar.
Adopt single jar following advantage arranged:
The first, can simplify furnace roof equipment, only need that a cover sealing is cut down, throttling is cut down, batch can and all press equipment.
The second, save the furnace roof height more than 500 millimeters.
Three, help preventing that furnace charge from doing adherent operation in the trunnion of center, make cloth even.
(4) formula throttling in Hubei Province is cut down
For preventing that furnace charge from doing adherent operation at the center trunnion, adopt for pure pan furnace top that Hubei Province formula throttling is cut down, throttling is cut down aperture and can be controlled.
(5) upper-lower seal is cut down
Can adopt the sealing identical with pW type furnace roof to cut down structure, according to different furnace top pressures, ore temperature, the planner can select according to the empirical design of oneself.
3) maintenance and repair of novel roof material distributing
All outside stove, the operating maintenance worker can carry out inspection and maintenance to whole transmission rigs at any time among the design.
When upper-lower seal is cut down, throttling is cut down, when rotary seal structure, chute damage up and down, the general employing changed integral unit.
Novel distributor furnace roof is provided with that suspension hook, hopper, batch can, upper-lower seal cut down, throttling is cut down, the center trunnion all be bearing in furnace roof movably chassis (8) go up (referring to figure seven).Chassis is to be suspended on the furnace top frame supporting-point by one group of nut during ordinary production, at this moment wheel leaves some distances of rail level, when changing the batch can lower member, unclamp whole suspension nuts, wheel mount drops on the track, remove the bottom and connect nut, chassis is removable to be left, and at this moment changes the batch can lower member with regard to available furnace roof suspension hook (5).
The replacing method of parts can be illustrated with figure seven.
Here emphasis narration chute and the replacing of rotary seal structure up and down.
(referring to figure seven) is when replacing with down rotary seal structure, the flange that earlier lower seal is cut down between (10) and center trunnion (14) is taken apart, regulate upper spring setter (24) and make corrugated tube (23) compression 10-15 millimeter, move movable chassis (8), center trunnion (14) upper unit is moved out, and then lift by crane center trunnion (14) successively with furnace roof suspension hook (5) and go up sealing (15), lining (17), sealing bore (16) and chute, lower seal (18) etc.
If preparation work is abundant, changes furnace roof parts maximum duration and generally can finish with interior at 12 o'clock.
The solution route of furnace roof height problem when 4) changing novel furnace roof into by two clock furnace roofs.
When being improved to novel furnace roof, generally all there is the insufficient problem of former furnace roof height by two clock furnace roofs.Ways of addressing this issue, can utilize the skew bridge angle of inclination beta greater than furnace charge angle of rest (repose) α,
This condition, skew bridge suitably can be extended
With furnace roof receiving opening deflection skew bridge one side, h just can be improved in material feeding quarrel position like this
h＝lSinβ
Consider that skew bridge adds that the back stress in bending increases, and can strengthen at its corresponding site.
5) novel furnace roof weight and investment
This its weight of novel furnace roof is close with pW type furnace roof.Be generally with 50～70% of the two clock furnace roofs of heat size.
With 300m
3Blast furnace is an example, and novel furnace roof is compared as follows with two clock idle running distributor furnace roof weight:
Aspect investment, largely depend on equipment, under equipment the same terms, new-type no clock furnace roof investment can be not many than two clock idle running distributor furnace roofs.
6) novel furnace roof technology and Economic and Efficiency Analysis:
This furnace roof major advantage is as follows:
(1) produces the important condition that provides for blast furnace is steady in a long-term.
Furnace top distributing gear is the main position that influences blast furnace campaign and cause damping down.Novel furnace roof mainly wear and tear with seal life all more than 2 years, main is that the replacing time is in 12 hours.This has not only prolonged life of arched roof, and, reduced delay ratio.
(2) provide best equipment for the roof material distributing optimizing:
The cloth performance of furnace top distributing gear of the present invention is identical with the pW type, and it has greatly strengthened the space that top is regulated, and to realizing smooth operation of furnace, improving the coal gas utilization provides essential condition.
(3) the low maintenance of running cost is convenient
This novel furnace roof running cost is few, and it can not cause the blast furnace gas dilution both without nitrogen yet, has overcome the high shortcoming of pW type furnace roof running cost.Its running cost is close with common double clock furnace roof.
This in addition furnace roof transmission mechanism is all outside stove.Maintenance and repair are very convenient.
(4) investment is low easy for installation
Novel furnace roof output investment ratio pW type furnace roof is low, for 300m
3The novel furnace roof of blast furnace takes and is pW type furnace roof below 80 percent, aspect installation, does not also have particular requirement.
Figure number and title thereof
Claims (16)
1, a kind of mechanism that distributes with swivel chute control blast furnace burden is characterized in that distributor chute is supported on (or being called the chute axle) on the rotating object, and the chute axle is supported on the distributor rotator.Rotator also drives chute axle and chute rotation when rotating.Outside the stove of chute axle and between the furnace interior branch tightness system is arranged.The actuating unit of chute axle rotation is outside stove, and it is positioned on the distributor rotator.Actuating unit drives the chute axle when its medullary ray rotation, and the inclination angle of chute also changes thereupon.The power supply of actuating unit is supplied with by electric slide channel.Sealing between distributor rotation position and the adjacent static position is realized by mechanical seal or compound sealing structure.
2, according to claim 1, the present invention connects center trunnion and non-rotary feeder system.Below the trunnion of center, distributor chute is bearing on the rotator based on master wheel and seal cartridge, seals the condition of having created between distributor rotation and the static position.
3, according to claim 1, among the present invention mechanical sealing linkage ring and distributor rotation position are carried out the static seal connection, stationary ring and distributor stationary part are also carried out static seal and are connect.Rotary seal between distributor rotation and the stationary part is become rotary seal between the dynamic and static ring end face.
4, the floatability for assurance rotating ring or stationary ring as claimed in claim 3 (being adjacent to reach two ring end faces) serves as to guarantee the seal wears compensation.The present invention connects stationary ring in the pair of seal rings or rotating ring by corrugated tube and distributor corresponding site.
5,,, designed the regulating spring device that can produce pulling force or thrust among the present invention for guaranteeing the control of mechanical seal end surface specific pressure as described in the claim 4.By changing the position of regulating spring upper nut, whole regulating spring device just can produce thrust or pulling force, and regulating spring device and corrugated tube are used, and just can control face pressure.
6,, lubricate for solving wear ring cooling and end face as described in the claim 3.With in the middle of stationary ring or the rotating ring end face, drive a garden ring groove among the present invention.When the dynamic and static ring end face is fitted when tight, between two rings circular channel, a garden has just been arranged.Be provided with lubricating oil inlet and outlet on stationary ring, lubricating oil enters loop turn from inlet, and lubricated and coolant seal ring and seal face are discharged by oil outlet then.
7,, be to guarantee lubricating oil proper flow on the loop turn of seal face as described in the claim 6.With partition loop turn is divided into two portions among the present invention, lubricating oil enters from an end of two sections circuits respectively, flows out from the circuit the other end again.
8, according to claim 1, the present invention is in adopting the compound seal scheme, in mechanical sealing linkage ring (or stationary ring) end face inboard, increase by a boss, correspondingly overlap inboard the increasing in one of stationary ring (or rotating ring) end face, thereby make the inboard formation of two ring end faces one cavity, insert the temperature resistant encapsulation filler in the cavity, packing press ring and rotating ring (or stationary ring) Lian Jie And static seal.This layer filler stops that furnace roof dust-laden coal gas near mechanical seal end surface, has prolonged the life-span of mechanical seal, and itself also has certain sealing function.
9, according to claim 1, the present invention in mechanical sealing linkage ring (or stationary ring) the end face outside, increases a boss (or concave station) in the scheme that adopts compound seal, corresponding to mechanical sealing static ring (or rotating ring) end face outside increase by one overcoat, set up the piston ring wear ring.The outer garden of piston ring wear ring and outer casing inner wall are adjacent to that the relative maintenance of ， And is static, and piston ring wear ring one end face and rotating ring (or stationary ring) convex platform (or concave station) side are adjacent to, and the face of being adjacent to is a rotary seal face.The little spring group that is installed in the overcoat is passed through the piston ring pressure ring, guarantees needed specific pressure on piston ring seal side and boss (or concave station) trim.This road piston ring mechanical seal can prevent the outer dust of stove near mechanical seal end surface, and itself also has certain sealing property.
10, according to claim 1, the medullary ray of chute axle intersects with center trunnion medullary ray among the present invention, and the chute axle is designed to two sections.
11, as described in the claim 10, among the present invention each section chute axle is bearing on two bearings on the rotator that is installed on the outer band gear of stove, the chute of driving axle rotating drive shafts cover is arranged in the middle of every pair of bearing, the chute axle passes tightness system and stretches in the stove, and chute just is suspended on the interior chute axle spindle nose of stove.
12, as described in the claim 10, each section chute among the present invention, an end bearing on the heat-resisting bearing that is installed on center trunnion hypomere, the other end be bearing in be installed on stove in addition gear revolve on the bearing of body.Driving sleeve, sealed structure and chute hanger are installed between the two bearings successively.
13, according to claim 1, the Ce ， And that the chute axle can be located at the center trunnion among the present invention passes the sealed structure on the annular seal space respectively, is bearing on the bearing of rotator of band gear, the chute hanger is at the middle part of chute axle, on the axle transmission in addition part in the stove outside part of chute axle.
14, as claim 10,13 is described, designed the dynamic structure of a cover gear motor-spiral thrust device-crank arm among the present invention, this cover mechanism volume is little, in light weight, be convenient to install on the canine tooth wheel disc, and And adapts to the big moment of chute axle, the slow speed of revolution, characteristics that corner is little.
15, as described in the claim 1013, the present invention is directly installed on worm gear on the chute axle, by gear motor-worm screw, drives the rotation of worm-wheel shaft and chute.
16, a kind of method of changing chute is characterized in that the feeder system on chute top is bearing on the transportable support, when changing chute, the chute inclination angle is transferred to 90 °, remove the furnace roof feeder system, hang out center trunnion and distributor rotator cover plate then, can directly change chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585102672A CN85102672A (en) | 1985-04-09 | 1985-04-09 | The new type mechanical device of blast furnace roof material distributing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585102672A CN85102672A (en) | 1985-04-09 | 1985-04-09 | The new type mechanical device of blast furnace roof material distributing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85102672A true CN85102672A (en) | 1986-10-08 |
Family
ID=4792672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585102672A Pending CN85102672A (en) | 1985-04-09 | 1985-04-09 | The new type mechanical device of blast furnace roof material distributing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85102672A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014819B (en) * | 2004-09-09 | 2010-09-01 | 奥图泰有限公司 | Distributor of hot feed material |
| CN103712458A (en) * | 2013-12-31 | 2014-04-09 | 大连华锐重工集团股份有限公司 | Straight insertion far feeding nozzle used for ore-smelting electric furnace |
| CN104528402A (en) * | 2014-11-25 | 2015-04-22 | 北京首钢国际工程技术有限公司 | Rotating sealing distributing machine |
| CN109957629A (en) * | 2019-03-29 | 2019-07-02 | 河钢股份有限公司承德分公司 | A kind of encapsulating method of blast furnace roof water-cooling sliding chute manhole |
-
1985
- 1985-04-09 CN CN198585102672A patent/CN85102672A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014819B (en) * | 2004-09-09 | 2010-09-01 | 奥图泰有限公司 | Distributor of hot feed material |
| CN103712458A (en) * | 2013-12-31 | 2014-04-09 | 大连华锐重工集团股份有限公司 | Straight insertion far feeding nozzle used for ore-smelting electric furnace |
| CN104528402A (en) * | 2014-11-25 | 2015-04-22 | 北京首钢国际工程技术有限公司 | Rotating sealing distributing machine |
| CN109957629A (en) * | 2019-03-29 | 2019-07-02 | 河钢股份有限公司承德分公司 | A kind of encapsulating method of blast furnace roof water-cooling sliding chute manhole |
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