CN2320970Y

CN2320970Y - Sealing device for end of rotary kiln

Info

Publication number: CN2320970Y
Application number: CN 97250044
Authority: CN
Inventors: 邓京林
Original assignee: LONGTAN HEAVY MACHINERY FACTORY SHUANGLONG GROUP CO Ltd JIANGSU PROV
Current assignee: LONGTAN HEAVY MACHINERY FACTORY SHUANGLONG GROUP CO Ltd JIANGSU PROV
Priority date: 1997-11-20
Filing date: 1997-11-20
Publication date: 1999-05-26
Anticipated expiration: 2007-11-20

Abstract

The utility model relates to a sealing device for ends of a cement rotary kiln, which uses a soft expansion and contraction section. The soft expansion and contraction section can be suitable for the motion of a kiln body and is composed of a fixing end, a free end, soft protective skins, heat insulation materials, etc., wherein the fixing end is connected with a fume chamber; the free end is provided with a friction ring and is drawn by a heavy hammer wire cable for tightly matching the other group of friction rings which are arranged on a material return hopper on the tail end of the kiln body; the fixing end is connected with the free end by the soft protective skins; the inner part of the utility model is filled with heat insulation filling materials. The sealing device can reduce wind leakage on the tail end of a rotary kiln. The utility model is favorable for improving production and saving energy for cement companies.

Description

A kind of sealing device that is used for the rotary kiln afterbody

The utility model relates to a kind of for the used sealing device of dry cement clinker producing rotary kiln afterbody, and this device is particularly useful for preheater kiln.

The quality of cement dry method rotary kiln kiln tail sealing not only directly influences the output and the energy consumption of kiln, also influences the production environment in cement plant simultaneously.At present, two kinds of forms of the main employing of domestic dry-process rotory kiln kiln tail sealing, promptly spring compression graphite block form and cylinder compress end-face friction sheet form.The former was because spring lost efficacy easily, and graphite block is also easily broken and often lose sealing function, so progressively suffer exit in recent years; The latter is that current dry-process rotory kiln is used more a kind of kiln tail seal form, and its chief component has back hopper, rotating friction plate, fixed friction sheet, sleeve, radial seal ring and cylinder etc.Now its version tube singly is described below: back hopper is installed on the kiln cylinder body afterbody flange, a circle rotating friction plate is equipped with in its outer face, one circle fixed friction sheet is housed on the end face of radial seal ring, the sealing ring by the suspension rod of both sides hang, and can appropriate axial wobble, under the pressure effect of cylinder, two circle friction plates keep fitting, and form one end face seal.On the interior garden of sealing ring asbestos cord is housed.And hoop is on sleeve.Form one radial seal again.Above-mentioned two seals constitutes the sealing of kiln tail jointly.This seal form remains in following defective:

1. the wearing and tearing of the asbestos cord on the garden are violent in the radial seal ring, after new asbestos cord installs, can only use the time about one month, if untimely replacing, air intake emits ash quite serious thus.

2. because kiln end temperature is higher, the cylinder frequent failure often causes two circle end-face friction sheets applyings not tight, and leaking out thus, it is very serious to run ash.

The cold wind owing to bleed makes the resolution ratio reduction before material is gone into kiln, and the output of kiln is difficult to improve, and has also increased the hear rate of grog simultaneously.Owing to emit ash, the production environment in cement plant is worsened more in addition.

The purpose of this utility model provides a kind of kiln tail sealing device, and it can prevent effectively that the kiln tail from leaking out and emit ash, thereby improves the output of kiln, reduces hear rate, can improve the production environment in cement plant simultaneously again.

The purpose of this utility model is achieved in that the soft telescopic joint structure that adopts can adapt to expansion of kiln body heat and play, one end of telescopic joint is fixed on the preheater smoke-box antetheca, the other end that links to each other by covering and thermal insulating filling is a movable end, and by the both sides roller wheel bearing, can be in orbit with the kiln axon to motion, its end face is equipped with the fixed friction sheet, under the gravity effect of weight, by rope traction, keep fitting and the realization sealing with the rotating friction plate that is contained on the kiln tail back hopper end face.

Owing to adopt technique scheme, thoroughly eliminated the deficiency of radial seal in the past, promptly fundamentally avoid asbestos cord to wear and tear piece and caused the disadvantage of poor sealing.Simultaneously,, also solved, influenced the problem of sealing effectiveness owing to the cylinder frequent failure causes that the end face applying is not tight owing to adopted the weight pressurization.Therefore, to the high and stable yields of kiln, energy-saving and cost-reducing and to improve production environment very useful.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is that common cylinder compresses end-face friction chip kiln tail hermetically-sealed construction sketch;

Fig. 2 is the structure diagram of an embodiment of the utility model;

Fig. 3 is the A-A cutaway view of Fig. 2.

Among the figure: 1. kiln body 2. back hoppers 3. rotating friction plates 4. cylinders 5. suspension rods 6. fixed friction sheets 7. radial seal rings 8. sleeves 9. asbestos cords 10. movable ends 11. coverings 12. thermal insulating fillings 13. stiff ends 14. pulleys 15. steel wire ropes 16. weights 17. tracks 18. rollers.

Figure 1 shows that the cylinder that front background technology part is introduced compresses end-face friction lamellar seal structure diagram.Below just figure its operation principle is described further: back hopper 2 is contained on the kiln body 1, its end face is equipped with rotating friction plate 3, hang by suspension rod 5, and can on the radial seal ring 7 of appropriate axial wobble fixed friction sheet 6 be housed, exerting pressure by cylinder 4 makes two circle friction plates remain closed the formation end face seal; Asbestos cord 9 and hoop are housed in the sealing ring on the garden on sleeve 8, form radial seal.The common kiln tail of forming of above-mentioned two groups of sealings seals.Owing to exist cylinder to be easy to lose efficacy, asbestos cord is easy to problem such as wearing and tearing and has a strong impact on sealing effectiveness.

In Fig. 2 and embodiment shown in Figure 3, kiln body 1, back hopper 2, rotating friction plate 3 and fixed friction the sheet 6 all common hermetically-sealed construction with shown in Figure 1 be identical, and the unique distinction of sealing structure has been to adopt soft telescopic joint to replace radial seal ring 7 among Fig. 1 and sleeve 8 etc.Telescopic joint mainly is made up of movable end 10, covering 11, stiff end 13 and thermal insulating filling 12.Movable end and stiff end all have back-up ring, play firm thermal insulating filling.Two back-up ring radial clearances are decided on the rule Yu of kiln, are advisable with 5-8mm, and its axial engagement degree of depth is decided on the shifting amount of kiln, with the 1.5-2 of shifting amount degree of being doubly.Roller 18 is equipped with in the both sides of movable end, and is supported on the track parallel with the kiln body axis 17.For preventing that moment of friction from causing movable end and rotating, every siding track all is made up of upper and lower two sections rail, and is stable to guarantee it.For guaranteeing that two rubbing surfaces are tightly closed, be provided with two groups or more weight pressing mechanism, an end of steel wire rope 15 hangs with weight 16, by pulley 14 commutations, gravity is acted on the movable end of telescopic joint, and two rubbing surfaces are fitted and the realization sealing.For prolonging the service life of friction plate, reduce the power consumption of rotary kiln simultaneously, rubbing surface can adopt graphite lubrication or set up oil pipe, adopts complex calcium lubricating grease lubricated.Not expression in the lubricated partial graph.

Can to select material trademark for use be the heat-resisting ductile iron of RQTSi4 to two circle friction plates in the present embodiment, it is the heat-resisting steel sheet and plate of 1Cr18Ni9Ti or 2Cr25Ni20Si2 that the movable end of telescopic joint and stiff end can be selected the trade mark for use, covering is selected air-locked composite stone cotton for use, and thermal insulating filling is selected the aluminic acid silica fibre for use.

Claims

1. the dry-process rotory kiln kiln tail sealing device of an end-face friction formula, it comprises back hopper, rotating friction plate and fixed friction sheet, its commentaries on classics is levied and is: the fixed friction sheet is installed in soft telescopic joint one end that can adapt to kiln body play, and the other end of telescopic joint is fixed on the antetheca of smoke-box.

2. sealing device as claimed in claim 1, the outside at its used telescopic joint two ends adopt airtight and heat-resisting covering to connect, inner adopt two coaxial, and the back-up ring of the changing of the relative positions mutually joint, and stuffed heat insulated heat resistance fiber between covering and the back-up ring.

3. roller is equipped with in the both sides that sealing device as claimed in claim 1, its used telescopic joint are equipped with fixed friction sheet one end, and by the rail support parallel with the kiln body axis, track is made up of upper and lower twice rail.