CN201944862U

CN201944862U - Flake-typed grate

Info

Publication number: CN201944862U
Application number: CN2011200327123U
Authority: CN
Inventors: 吴德广; 吴耀奎
Original assignee: 吴德远
Priority date: 2011-01-31
Filing date: 2011-01-31
Publication date: 2011-08-24
Anticipated expiration: 2021-01-31

Abstract

The utility model discloses a flake-typed grate which comprises plywoods and grate bars clamped between the plywoods, and shaft heads on the grate bars are inserted inside shaft holes on the plywoods. The flake-typed grate is characterized in that four grate bars are arranged between one pair of the plywoods, and four shaft holes are arranged on the plywoods at positions corresponding to the grate bars. The thickness of a combustion-bearing body of each grate bar is from 19 mm to 22 mm, and the width of the working surface of the combustion-bearing body is from 40 mm to 45 mm. The flake-typed grate is good in high temperature resistance and deformation resistance, benefits air inletting, and the service life is prolonged.

Description

Louver stoker

Technical field

The utility model relates to a kind of fire grate, is a kind of louver stoker specifically.

Background technology

Present large-sized boiler is based on fire coal, most louver stokers that adopt, and louver stoker is made up of clamping plate 5 as shown in Figure 4 and the fire bars that is clipped between two clamping plate, and fire bars 1 can take different shapes and quantity as shown in Figure 1 to Figure 3.With fire bars shown in Fig. 1 is example, and fire bars comprises that holding of top burn body 1a and flip body 1b, and fire bars 1 turns over the axis body both sides has two spindle noses to be installed on the clamping plate 5 of two tape spool hole 5a.200 millimeters of clamping plate 5 long less thaies, except 5 hole clamping plate shown in Fig. 4, also have 6 holes and 7 hole gauge lattice with 6 fire bars among corresponding diagram 2 and Fig. 3 and 7 fire bars, common name porous (eye) clamping plate, clamping plate rear and front end are provided with the lug 5b, the 5c that protrude to both sides and limit the pendulum angle of fire bars to stop fire bars.

Strong, the deformation resistance of the hear resistance that depends on fire grate the service life of fire grate.With regard to regard to a kind of material, fire bars quantity corresponding on the clamping plate is many more, and the fire bars width is just narrow, it is just thin more that the holding of porous type fire bars burnt body, the thickness that five hole fire bar bearers for example shown in Figure 1 burn body 1a is 12-14mm, and the surface area of thin slice fire bars is relatively large, oxidation easily.For resistance to deformation, the deformation parameter of iron and steel depends primarily on workpiece profile and operating temperature, and a simple strip of sheet fire bars as shown in Figure 3 is crooked easily under same temperature.5 hole fire bars deformation resistances among Fig. 1 are better than 6,7 hole fire bars among Fig. 2 and Fig. 3, but because flip body 1b goes up the existence of axial trough 1c, its choke coefficient is big, improper ventilation brings cooling not good thereupon, and is therefore overheated easily, add an anti-groove that burns, so very easily because of be out of shape by high temperature.

The large-scale louver stoker of porous type, fire bars quantity is many, and the fire bars two end axles is thin, sheet thin, and intensity own is low, so it is fragile not only in use to be heated, just is connected in and also is easy to damage in installation, the handling process.In addition, it is close how fire bars is just arranged, and the profile style windage of existing as shown in Figure 1 to Figure 3 fire bars 1 is big in addition, and air channel 2 ventilates not smooth, and its consequence one is that the stove internal combustion is bad, and fire bars is air-cooled bad on second.Finally will be created in fire bars flexural deformation in the hot environment, very easily oxidation decortication, oxidation growth under the ventilation state, crowded stuck mutually, can not rotate the cleaning lime-ash, usually break bad ear bar off with the fingers and thumb, even full group comes off.Particularly northern extremely frigid zones, heating time is long, requires the temperature height, and heating value of coal is big, and it is higher to contain sulfur, bigger to the fire bars infringement, the phenomenon that fire bars operation just just thoroughly broke down in several days often occurs.

The porous fire bars is divided into general, ear bar, every group general the ability of not overturning, can not overturn automatically and topple over the cleaning lime-ash, necessary fire bars (ear row) with one to two band ear promotes general of earless, slag bonding during burning, and the ear bar is busy enough with one's own affairs, remove to promote to organize full fire bars again, very difficult, adding the power of passing to ear row is rigidity, usually causes ear row to destroy and comes off.

Therefore, press for a kind of fire bars rational in infrastructure and clamping plate.

The utility model content

The purpose of this utility model is to provide a kind of novel louver stoker, and this fire grate is firm, and is not fragile.

The utility model adopts following technical scheme: a kind of louver stoker, comprise clamping plate and be clipped in fire bars between the clamping plate, spindle nose on the fire bars is inserted in the axis hole on the clamping plate, four fire bars are housed between described a pair of clamping plate, corresponding fire bars is provided with four axis holes on the clamping plate, it is 19-22mm that the holding of every fire bars burnt body thickness h, holds that to burn body running face width degree w be 40-45mm.

Air channel between the flip body of adjacent fire bars is for helping air intake in stove by wide narrow down horn-like from the air inlet to the air outlet.More satisfactory specification is, described air channel air inlet w1 width is 44-45mm, and air outlet width w2 is 7-7.05mm.

Described flip body working face burns the body running face and becomes 91-120 degree angle with holding, and the flip body working face is shiny surface or has the degree of depth to be not more than the shallow slot of 10mm, and light helps falling ash more more certainly, holds that to burn between body running face and the flip body working face be the transition inclined-plane.

Described clamping plate rear and front end is provided with lug, and the thickness of described rear end lug is 5-7mm, and the distance of front end lug and clamping plate front edge is 20-21mm.

This louver stoker of the present utility model, owing to have only four fire bars on a pair of clamping plate, it is 19-22mm that the holding of every fire bars burnt body thickness, holds to burn body and hold that to burn face width be 40-45mm.The fire bars total surface area that thickens broadening on each clamping plate reduces relatively, the hear resistance and the anti-deformation of fire bars have been improved, simultaneously because fire bars quantity reduces the quantity minimizing of its flip body, so the air inlet gap increases between the adjacent fire bars, help increasing intake and improve cooling effect, with the service life of the fire grate that improves.

Description of drawings

Fig. 1-Fig. 3 is that the fire bars of existing louver stoker is arranged schematic diagram.

Fig. 4 is a kind of 5 hole clamping plate schematic diagrames.

Fig. 5 is 4 hole clamping plate schematic diagrames of the present utility model.

Fig. 6 is the arrangement mode schematic diagram of fire bars in the fire grate of the present utility model.

The specific embodiment

Below by specific embodiment the utility model is described in further detail, to help understanding content of the present utility model.

A kind of louver stoker, comprise clamping plate 5 as shown in Figure 5 and be clipped in fire bars as shown in Figure 61 between the clamping plate, spindle nose on the fire bars (omitting among the figure) is inserted in the axis hole on the clamping plate, between every pair of clamping plate as shown in Figure 6 mode four fire bars are housed, corresponding fire bars is provided with four axis hole 5a on the clamping plate, the holding of every fire bars burns body 1a and thickness h is 19-22mm, and holding the width w that burns body running face 1c is 40-45mm, forms the bulk that thickens that broadens and holds the burning body.The porous type fire bars in 5-7 hole is a thin slice, and four cellular types is chunk in the utility model, and oxygen enters the same degree of depth, and the long-pending big oxidation easily of sheet surface has almost just been penetrated; Chunk does not but exist this problem, good heat resistance.Other four hole fire bars axles are thick, sheet is thick, and be not afraid of soon again when carrying, installation yet and make a mess of, not loss, maintenance in service is also easy to be many.This novel four hole fire bars lack for every group than original porous fire bars uses 1～3 fire bars, holds to burn the body running face and broaden and extend backward, makes it form a thick and heavy iron platform, so increase the weight of part away from the axle center, takes down axial trough and deducts the reaction arm of force again.One increases one subtracts single armed active force of formation, so every group, every fire bars can both overturn freely when operation automatically, goes to push away it without the ear bar, the flexible lime-ash that just can fall automatically of counter-rotating.

The multi-disc fire bars changes four blocks of fire bars into, and it is unobstructed just to make air inlet gap, air channel strengthen air intake.As shown in Figure 6, the air channel between the flip body of adjacent fire bars 2 by air inlet to air outlet by wide narrow down horn-like.Described air channel air inlet width w1 is 44-45mm, and air outlet width w2 is 7-7.05mm.

As shown in Figure 6, flip body working face 1d burns body running face 1c and becomes 91-120 degree included angle A with holding, flip body working face 1d is shiny surface or has the degree of depth to be not more than the shallow slot of 10mm, holding between the working face of the working face that burns body and flip body is the transition inclined-plane, to help falling ash, reduce the mounting board influence of ash to fire bars.In addition, the change of shape, take down axial trough or axial trough shoals, the flip body windage diminishes and has improved intake greatly, and it is horn-like that the air channel is, and air-admitting surface is tens times of air outlet, according to channel theory, the air quantity that blows into burner hearth is just big a lot, and wind is sufficient to have burnt well, and fire bars cooling has simultaneously also just been accelerated.

No matter original clamping plate are that the outline size of 7,6,5 holes (eye) and this novel clamping plate is basic identical, and length is constant, and just porous has become four present holes, and the diameter of axle slightly strengthens.Former plywood hole is many, and the two ends lug is little, and it is bad to bump breakdown easily.As shown in Figure 5, novel clamping plate four holes are uniform, and front end lug 5c moves backward, and the distance L 2 of lug and clamping plate front edge is 20-21mm.Rear end lug 5b thickening, the thickness L1 of rear end lug 5b is 5-7mm, has solved the crucial difficult problem of original clamping plate rapid wear.

Adopt four hole fire grates, fire bars quantity reduces, and has also just reduced installation workload and maintenance load, and be example with regard to 20 tons of stoves: 6 hole fire bars need be adorned 4224, change novel four hole fire bars into, only adorn 2816, adorn half less, compare with 7 hole stoves, and difference is bigger.

Claims

1. louver stoker, comprise clamping plate and be clipped in fire bars between the clamping plate, spindle nose on the fire bars is inserted in the axis hole on the clamping plate, it is characterized in that: four fire bars are housed between described a pair of clamping plate, corresponding fire bars is provided with four axis holes on the clamping plate, it is 19-22mm that the holding of every fire bars burnt body thickness h, holds that to burn body running face width degree w be 40-45mm.

2. louver stoker as claimed in claim 1 is characterized in that: the air channel between the flip body of adjacent fire bars is by wide narrow down horn-like from the air inlet to the air outlet.

3. louver stoker as claimed in claim 2 is characterized in that: described air channel air inlet width w1 is 44-45mm, and air outlet width w2 is 7-7.05mm.

4. as described louver stoker one of in the claim 1 to 3, it is characterized in that: described flip body working face burns the body running face and becomes 91-120 degree angle with holding, the flip body working face is shiny surface or has the degree of depth to be not more than the shallow slot of 10mm that holding between burning body running face and the flip body working face is the transition inclined-plane.

5. louver stoker as claimed in claim 4 is characterized in that: described clamping plate rear and front end is provided with lug, and the thickness L1 of described rear end lug is 5-7mm.

6. as described louver stoker one of in the claim 1 to 3, it is characterized in that: described clamping plate rear and front end is provided with lug, and the distance L 2 of front end lug and clamping plate front edge is 20-21mm.