CN201244548Y

CN201244548Y - Dual-barrel type screen grader

Info

Publication number: CN201244548Y
Application number: CNU2007200136435U
Authority: CN
Inventors: 杨桦; 杨胜哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-02
Filing date: 2007-08-02
Publication date: 2009-05-27
Anticipated expiration: 2017-08-02

Abstract

The utility model relates to a double-tube screen grader which can make sure to limit the discharge grain size of a sieve; the screen grader is machinery equipment for a coal power plant, coal processing and other departments; materials which enter first go through a tube-shaped comb type bull screen cylinder, so that large materials which are larger than the spacing of screen strips are hit out in the direction of the screen strips along the axial direction, and small particles and the like which are smaller than the spacing of the screen strips are flipped on the surface of the inner cavity of a multi-pored fine screen plate cylinder; all materials which meet the discharge grain size requirement of the sieve drop from a screen hole, and lump materials (materials on the fine screen) which are larger than the hole are discharged like the materials with the bull screen through the rotation of the fine screen plate cylinder, so as to realize the goal of screen grading of fine grain size.

Description

Dual cartridge type screening machine

Technical field:

The dual cartridge type screening machine of the utility model is a coal-fired power plant, and production divisions such as coal processing carry out the plant equipment of screening operation.Specifically the screenings discharging-material size to screening requires more a kind of novel screening plant.

Technical background:

Enter the fuel of coal applying unit now because its mixing ratio is bigger, powder containing quantity, moisture grade all unsatisfactory.Especially under the condition that the material screening granularity requirements is limiting, as not satisfying the operating mode demand, not only influence the system equipment operate as normal, and to productivity effect, safe operation all can bring great harm.

As the furnace charge of circulating fluidized bed boiler, coal and coal ore, it requires into the stove granularity is in 10 millimeters, but feed but can not satisfy far away, and it is just passable to carry out break process after screening again.Work as screen size: d10 millimeter (screenings), go into to sieve granularity: the D100 millimeter, mixing ratio is bigger, wherein contains foreign material simultaneously: as plastic products, cotton yarn, rag and wooden unit or the like.Adhesive water is again in critical condition, and when being in this operating mode, very big to screening machine work influence, general screening machine is difficult to reach its requirement, and it is very outstanding to produce stifled sieve phenomenon.

Summary of the invention:

At above-mentioned situation, we analyze " rotary screen extension set " commonly used tracking through what, and novel dual cartridge type screening machine has now been developed in research.

The purpose of this utility model provides a kind of dual cartridge type screening machine, and it can overcome stifled sieve phenomenon, has improved screening efficiency again, and the screen-penetrating performance energy.

The technical scheme that the utility model technical solution problem is adopted is: it comprises the two-stage screening plant, it is characterized in that on the screen drum parts in the screen(ing) machine two tubular compass screen surfaces being housed, the bar-shaped grating of scalping tube is fixed in the screen drum cage type skeleton with machine folder method, adorning the thin sieve plate tube outward with its screen drum, both are complementary, make up and are engaged in revolution running together.To go into the machine material at first through tubular comb formula screen drum, bulk materials and foreign material thereof greater than the grating gap are sieved away along axially suitable its grating.And, then borrow its deadweight and centrifugal force just to leave on the dusting cover tube inner chamber that is shaped on the porous tubular less than things such as the fritter in grating slit and particles thereof.All screenings that reaches particle requirement, it just is scattered down from its sieve aperture, then leans on the turning effort of dusting cover tube simultaneously greater than the fritter (oversize) of sieve aperture, discharges together in company with the scalping oversize, thereby has realized the screening purpose that fine granularity requires.

The beneficial effects of the utility model are; Because this machine is equipped with two compass screen surfaces, after material is gone into machine, big thing is axially without hindrance, unimpeded and do not fill in along it, carrying out the centrifugation of thick, thin material simultaneously, each Hang Qilu, thus overcome stifled sieve phenomenon, guaranteed the screen-penetrating performance energy of two compass screen surfaces, improved screening efficiency, thus this type screening machine have volume little, exert oneself big, low energy and subtract the characteristics of consumption.

For guaranteeing this machine in screening work, smooth and easy, walk material speed and effect thereof, its plane, screen drum axle center has one and walks material unloading inclination angle, is advisable for general 20 °～25 °.

Description of drawings:

Fig. 1 is the schematic diagram of dual cartridge type screening machine operation principle.

Fig. 2 is dual cartridge type screening machine mechanical construction drawing.Fig. 2 a: front view, Fig. 2 b: side view.

The specific embodiment:

Below in conjunction with example such as Fig. 2 the dual cartridge type screening machine of the utility model being done one specifies.

From Fig. 2 as seen, the dual cartridge type screening machine of the utility model, it is mainly by (Fig. 2 a) parts such as body 1, screen drum 2, cover 3, front shroud 4, (Fig. 2 b) transmission mechanism 5 and electric reducer 6 constitutes.

It is characterized in that having after screen drum is gone forward two circle ring raceways of revolution operation, coincide respectively on raceway roller support before and after the body that its raceway section is a bearing holder (housing, cover) shape by several pieces of steel balls.Grating section on its scalping tube is trapezoidal galley proof, assembling back one-tenth tubular pectination, and the thin sieve plate tube, plate barrel upper punch has several material spilling holes.Screen drum in its screen(ing) machine is installed the plane, axle center, has away material discharging inclination angle.

1, airframe components: it is made up of parts such as material bin, body and front and back raceway bearings, and (Fig. 2 a).

Material bin: it is the steel plate group welding piece, studs with liner plate in it, is contained in the top of body with securing members such as bolts, and its mounted angle is advisable for general 50 °～55 °.

Body: this part is the strength member of screening machine, adopts structural part of steel plate to make.Its base plate has installs basic hole, is disposing the mounting base of electric reducer in the one side.Use difference by operating mode, the branch of left and right installation is arranged.

The raceway bearing: it is a screen drum work revolution raceway, its spacing, version etc., and it is to depend on working condition requirement, and raceway is to adopt rolling bearing type, should have wearability and lubricity well.It is joined and is welded in the body, should guarantee its rigidity and indeformable, and its raceway place has dust prevention.

2, screen drum parts: it is the core component of screening machine work, and (Fig. 2 a).Form by parts such as screen drum, scalping bar, thin sieve plate tube and securing members.

Screen drum: it is that cage type is skeleton, encircles raceway with disposing circle before and after it respectively, and the raceway section is a bearing holder (housing, cover) shape, becomes cylindrical shell with scalping bar and thin sieve plate tube bearing assembly welding.The mount pad and the machine thereof that also have the driving chain circle in its underpart circle ring raceway side press from both sides installing hole etc.

Because screen drum is the major part of screen(ing) machine revolution work, under the stressed effect of rolling, not only enough strength and stiffness should be arranged, and when making, also to control the axiality of its running surface and precision thereof etc. well, with guarantee in the work steadily, reliable.

The scalping bar of installing in the cylindrical shell and the radial spacing of thin sieve plate tube bearing are unsuitable too small.Be generally 2～3 times of scalping bar slit.And the parameters such as circumferential spacing, section configuration, diameter and active length thereof of scalping bar are all different different because of its working condition requirement.

The scalping tube: it is that to adopt section be that the grating of trapezoidal rod sample is installed in the cage type screen drum body, and the scalping face of assembling back tubular pectination, its grating are to be fixed in the screen drum on the bearing by the machine clamping method.Owing to be subjected to impact, the abrasive action of material in its work, therefore, should select for use shock-resistant and the good material of wearability is made

The thin sieve plate tube: it is a vital part of guaranteeing the requirement of screen(ing) machine discharging-material size.After this machine adopted the corrosion resistant plate punching to make tubular, outside screen drum, specification parameters such as its plate tube diameter and sieve aperture thereof all will be set by its job specification with the locking of parts such as clamp.

3, cover parts: (Fig. 2 a), it is by cover, and parts such as cleaning door are formed.Be located in the top of body.By it being fitted together in body and front shroud in conjunction with the parts such as fastening bolt on the side plate.

Cover is that plate welding structure spare is made.Be the screen(ing) machine maintenance work, offer a fan cleaning door above it, the work dust of preventing leaks, the strict sealing of its Men Bianying.

4, preceding cap assembly: (Fig. 2 a), it is that the oversize of screen(ing) machine is when dishing out and the outer configuration of loosing of sealing dust; Also make with plate welding structure spare.Wherein a side has drive sprocket and moves towards hole, is regular maintenance, also has a fan cleaning door with its end face.

5, drive mechanism: (Fig. 2 b), it is by chain circle ring, double-stranded wheel, parts such as transmission axle bed and guard shield are formed.

6, electric reducer: (Fig. 2 b), it is mating cylindrical gear reducer, parameters such as its specification, power are all selected with requiring different according to working condition.

Claims

1, dual cartridge type screening machine, it comprises the two poles of the earth screening plant, it is characterized in that on the screen drum parts in the screen(ing) machine two tubular compass screen surfaces being housed, the bar-shaped grating of scalping face is fixed in the screen drum cage type skeleton with machine folder method, adorning the thin sieve plate tube outward with its screen drum, both are complementary, make up and are engaged in revolution running together.

2, according to the said dual cartridge type screening machine of claim 1, it is characterized in that parts organism, cover, front shroud, transmission mechanism that screen(ing) machine constitutes and the cylindrical gear reducer that is mated.

3, according to the said dual cartridge type screening machine of claim 1, it is characterized in that having after screen drum is gone forward two circle ring raceways of revolution operation, coincide respectively on raceway roller support before and after the body by several pieces of steel balls, its raceway section is a bearing holder (housing, cover) shape.

4, according to the said dual cartridge type screening machine of claim 1, it is characterized in that the grating section on the scalping tube is trapezoidal rod sample, assembling back one-tenth tubular pectination, and the thin sieve plate tube, plate tube wall surface upper punch has several material spilling holes.

5, according to the said dual cartridge type screening machine of claim 1, it is characterized in that the screen drum in the screen(ing) machine is installed the plane, axle center, have away material unloading inclination angle.