CN2284792Y - Sealing device of drive water-cooling gear box for blast furnace top distributing - Google Patents

Abstract

The utility model relates to a sealing device of a material distributing drive water-cooling gear box for a blast furnace bellless furnace roof, wherein, the upper part of the utility model uses a graphite block to seal the channel that blast furnace gas enters into a gear box. The normal operating condition of the gear box can be ensured. A drain tank at the lower part is a chamber, the liquid surface in the tank can not follow the changes of air pressure in a furnace, and the cooling water in the tank can not flow in the furnace. The utility model has the advantages of no temperature influence, simple installation, evident sealing effects, free operation, low manufacturing costs, and low operation costs.

Description

BF Bell-less Top Fabric Driven Water Cooling Gearbox Seal

A kind of tightness system that is used for large and medium-sized blast furnace bell-less roof material distributing transmission water-cooled wheel casing.

The sealing of blast furnace bell-less roof material distributing transmission water-cooled wheel casing mainly refers to the sealing between tumbler and the mounting block, and this type of is sealed in and comprises upper and lower two portions in the water-cooled wheel casing.Prior art is shown in patent document 88101377, the top seal of this patent (seeing patent 88101377 Fig. 2) is to process groove on Box Cover, and form labyrinth structure between the inside and outside wall of annular supply flume, the rare gas element that simultaneously pressure is slightly larger than the State of Blast Furnace internal pressure and is lower than intake pressure directly charges in the annular supply flume, enter annular supply flume internal contamination water coolant with coal gas in the stove that prevents to have a large amount of dust, reach the purpose of sealing gland from face.This is actually the sealing gland water cooling plant, promptly adds sealing gland on the water-cooled basis.The lower seal of this patent (seeing patent 88101377 Fig. 3) has adopted sealing structure for water, the design philosophy of its sealing structure for water is for " providing a kind of measure that is used for guaranteeing the minimum level of the liquid levels in the collector; make the lower rim of periphery 62 be arranged in liquid, form a liquid barrier one by one whereby between stove inside and chamber 26." be that coal gas enters wheel casing in the stove, at first to pass through liquid barrier, and the flushing by water curtain.

There is weak point in above-mentioned prior art at the seal aspect of blast furnace bell-less roof material distributing transmission water-cooled wheel casing.At first, its slit of the labyrinth structure on top can not be regulated after installation, and the slit is excessive, and the sealing gland air leakage is big, can not satisfy the sealing gland requirement; The slit is too small, to the accuracy requirement height of processing, installation, and easy temperature influence.Secondly, the sealing structure for water of bottom, as shown in Figure 3 in the patent document 88101377, periphery 62 is with the liquid level separated into two parts in the collector 60, and a part is subjected to the effect of gear case body internal pressure, and another part is subjected to the effect of State of Blast Furnace internal pressure.Be greater than furnace pressure owing to feed the gaseous tension of annular supply flume, make medial surface a little more than the outside, under perfect condition, when promptly furnace pressure and casing internal pressure are basicly stable, two-part liquid level kept in balance.Because furnace pressure alters a great deal in the blast furnace production, when furnace pressure reduces suddenly, the pressure reduction of casing internal pressure and furnace pressure increases, under this differential pressure action, the water of one side of wheel casing will be pressed to a side in the stove, entered in the stove by the slit between plectane 64 and the groove 66, this will have a strong impact on the ordinary production of blast furnace.

The purpose of this utility model is exactly to design a kind of not temperature influence, simple, the significant sealing affection of installation in order to overcome above-mentioned the deficiencies in the prior art, can move the tightness system of blast furnace bell-less furnace roof transmission water-cooled wheel casing freely.

The technical solution of the utility model comprises sleeve 2, annular supply flume 4, sealing graphite block 3 and has only the garland 11 in a chamber, the spiral coil cooling tube 14 that several rhizospheres are arranged around rotor 8.Each serpentine tube links to each other with annular supply flume 4 and garland 11 with conduit 7, and water coolant flows in casing by water-supply pipe 12, annular supply flume 4, serpentine tube 14, garland 11, discharges from U-shaped pipe 13.Use graphite block 10 sealings between the lower flange cylindrical of rotor 8 and the inwall of garland 11.Graphite block 10 is fixed on by pressure ring 18 on the lower flange of rotor 8, and the end play of itself and garland 11 is by the pad adjustment.It is characterized in that graphite block 3 is contained between sleeve 2 and the annular supply flume 4, the zero stand-off between the side of graphite block 3 and top and the box cover 20 is installed and is adjusted with pad.

Existing accompanying drawings is as follows.As shown in Figure 1, the water-cooled wheel casing comprises that one is arranged vertically at the center at blast furnace center trunnion 1, and its outer, coaxial is equipped with sleeve 2; One and center trunnion 1 coaxial mounted annular supply flume 4; A rotor 8 that links and support worm reduction gear 9 and distributor chute simultaneously with annular supply flume 4; A stationary bearing 15 that separates with gear case body 5 reaches and the hard-wired garland 11 of bearing; The spiral coil cooling tube 14 that several rhizospheres are arranged around rotor 8.Each serpentine tube links to each other with annular supply flume 4 and garland 11 with conduit 7, and water coolant flows in casing by water-supply pipe 12, annular supply flume 4, serpentine tube 14, garland 11, discharges and take away heat with known method from U-shaped pipe 13.

The top seal structure is seen accompanying drawing 2.As shown in the figure, form cavity A between the inwall of sleeve 2 and annular supply flume 4, this cavity is communicated as can be seen with in the State of Blast Furnace by accompanying drawing 1.In annular supply flume 4 upper inside wall graphite block 3 is housed, graphite block 3 is a domain, and is fixing with pressing plate 16 and holding screw 17.Be designed to the zero stand-off with box cover 20 above the side of graphite block 3 reaches (available pad adjustment) is installed, form a complete tightness system in upper gear case like this, the assurance blast furnace gas can't enter gear housing inside from cavity A.The advantage of graphite block is that frictional coefficient is little, and resistance to compression and wear resisting property are good, and not yielding.These advantages are highly profitable to the works better that guarantees sealing.

The lower seal structure is seen accompanying drawing 3.As shown in the figure, the method that Fig. 2 adopts in 93205618.0 patent documents of Shoudu Iron and Steel Co has still been continued to use in sealing herein, promptly uses graphite block 10 to seal between the inwall of the lower flange cylindrical of rotor 8 and garland 11.Graphite block 10 is fixed on by pressure ring 18 on the lower flange of rotor 8, and the end play of itself and garland 11 can be by the pad adjustment.Radius clearance between the lower flange cylindrical of rotor 8 and the inwall of garland 11, can guarantee that the more above-mentioned end play of radius clearance is big man-hour adding, can prevent from like this to raise because of throat temperature, the lower flange cylindrical of rotor 8 and the inwall of garland 11, because of the expansion of radial dimension produces contact and friction, can keep the end play between graphite block 10 and the garland 11 less again, guarantee the normal of lower seal.

One of difference of the design and patent document 88101377 is that rare gas element or purification coal gas way routinely feed in the wheel casing, do not feed in the annular supply flume; Two of its difference is, in garland, do not form the dividing plate of U-shaped water seal, do not form Communicating device, just make the drainage tray of water coolant, liquid level pressure is sealing air pressure in garland like this, and with stove in gas pressure change irrelevantly, prevented to occur in the garland pressure imbalance, water coolant does not enter in the stove with regard to not flowing backwards like this.For guaranteeing the reliability of lower seal, still charge into rare gas element in the casing with known method, improved the reliability of upper and lower part sealed structure so greatly; Three of its difference is, the confession of the utility model water coolant, row be from the blast-furnace cooled water system, the closed system of non-self-circulation, thus reduced investment and running cost.In a word, the utility model is actually the water-cooled air seal set, is to improve sealing gland, increases water-cooled.Prevent that with sealing gland coal gas enters in the wheel casing in the stove, reduce the temperature of componental movement spare with water-cooled.

The utility model has the advantage of and to guarantee good between tumbler and the fixture Good sealing, can guarantee again when top temperature raises, not increase tumbler and fixture it Between frictional resistance, of the present utility modelly be also advantageous in that to keep rhone pressure flat Weighing apparatus has been got rid of cooling water and has been poured into the interior hidden danger of stove.

Description of drawings:

Fig. 1---blast furnace bell-less roof material distributing transmission water-cooled gear box structure synoptic diagram

Fig. 2---be accompanying drawing 1 middle and upper part hermetic unit synoptic diagram

Fig. 3---be accompanying drawing 1 middle and lower part hermetic unit synoptic diagram

1---center trunnion 2---sleeve wherein

The annular supply flume of 3---graphite blocks 4---

5---casing 6---planetary differential step-down gear (

Do not draw complete)

7---conduit 8---rotor

9---worm reduction gear 10---graphite block

11---garland 12---water-supply pipe

13---water shoot 14---spiral coil cooling tube

15---fixedly arm 16---pressing plate

17---holding screw 18---pressure ring

19---the rare gas element filling orifice

20---box cover

Claims (1)

1, a kind of BF Bell-less Top Fabric Driven Water Cooling Gearbox Seal, comprise sleeve (2), annular supply flume (4), sealing graphite block (3) and have only the garland (11) in a chamber, the spiral coil cooling tube (14) that several rhizospheres are arranged around rotor (8).Each serpentine tube links to each other with annular supply flume (4) and garland (11) with conduit (7), water coolant is by water-supply pipe (12), annular supply flume (4), serpentine tube (14), garland (11), in casing, flow, discharge from U-shaped pipe (13), use graphite block (10) sealing between the inwall of the lower flange cylindrical of rotor (8) and garland (11).Graphite block (10) is fixed on the lower flange of rotor (8) by pressure ring (18), the end play of itself and garland (11) is by the pad adjustment, it is characterized in that graphite block (3) is contained between sleeve (2) and the annular supply flume (4), the zero stand-off between the side of graphite block (3) and top and the box cover (20) is installed and is adjusted with pad.

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