CN2388498Y

CN2388498Y - Coal leak preventing side-sealing device for cross chain fire grate

Info

Publication number: CN2388498Y
Application number: CN 99244580
Authority: CN
Inventors: 张务勋
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-16
Filing date: 1999-09-16
Publication date: 2000-07-19
Anticipated expiration: 2009-09-16

Abstract

The utility model discloses a coal leakage preventing side-sealing device for a cross beam type chain fire grate. The utility model is characterized in that a fire grate piece which is the first fire grate piece close to the side wall plate of a fire grate is a side fire grate piece with a lug boss; a sealing block and a sealing clamp block are arranged at the lower bottom of an anti-scorch box, and the sealing block is connected with the sealing clamp block by screw bolts; the outermost place of the bottom of the sealing block protrudes downwards, the second layer is a concave plane which is dented inwards, and the third layer is a bottom surface which protrudes downwards to fit with the bulge of the top of the fire grate piece to form labyrinth sealing so that coal and coal dregs can be prevented from leaking from the side part, and air can be prevented from leaking from the side part. The utility model has the advantages of simple structure and high practicability.

Description

Crossbeam type chain-grate coal leak preventing side-sealing device

The utility model relates to a kind of seal arrangement, particularly relates to a kind of crossbeam type chain-grate coal leak preventing side-sealing device.

Chain-grate boiler is used very wide on small power plant or industrial boiler, the existing so far one-hundred-year history that goes up, and its main feature is safe and reliable to operation, abroad, the capacity of its operation is greatly to more than the 100t/h.Fixedly depositing the gap between the wallboard as the motion parts of fire grate and both sides, walk around fuel bed and directly scurry into burner hearth from marginal gap and influence the normal operation of grate in order to prevent a large amount of air, must be at the position, gap of fire grate both sides device seal arrangement, both prevented thin raw coal from leaking down and caused burning out the part of fire grate both sides, and also prevented the lime-ash that bleeds and foreign matter etc. and cause the fault that fire grate blocks from the both sides of fire grate.Usually, the top of its limit fire grate segment is with adjacent and the same by the top structure of the fire grate segment in fire grate center portion, be level, and the bottom of its top adjacent seals piece is the plane substantially, so duff, lime-ash on the grate surface often leak down, leaking out also can spill around this gap, and the sealing inefficiency directly influences the efficient of boiler and the safety of operation.

Problem at above-mentioned existence, the purpose of this utility model is to provide a kind of like this crossbeam type chain-grate coal leak preventing side-sealing device, it is simple in structure, rationally, be labyrinth sealing, it both can prevent to leak coal from both sides, leaked slag in order to avoid damage the heating surface parts, can prevent again through leaking out herein, thus the Economy and the Security that have improved whole boiler.

For achieving the above object, the utility model has been taked following technical measures.The top of its limit fire grate segment upwards rises from boss; the bottom of its top sealing block with matching; its most external is outstanding downwards; be inwardly to form concave surface from outside to inside; inwardly be the base plane of downward protrusion again, make between sealing block, sealing fixture block and the limit fire grate segment and formed labyrinth sealing, prevent through this sidepiece leak down coal or slag and other foreign matter; reduce mechanical failure, protected the sealing of fire grate both sides.

Major advantage of the present utility model is:

1. simple and reasonable, the top of the fire grate segment that keeps to the side has boss, protrude downwards the most external bottom, bottom of the sealing block of Pei Heing with it, form concave surface inwards, stretch out downwards inwards again for flat, make sidepiece form labyrinth sealing, its good seal performance with Bolt Connection with the sealing fixture block, both anti-leak-stopping coal leaks slag and foreign matter to be blocked fire grate and makes part impaired and cause fault, has also prevented from upwards to leak out.

2. the sealing block arc shaped surface part that contacts with anti-clinker box is provided with inside concave surface, has both ensured the closely tight of both surface of contact, still can closely contact when guaranteeing its free expansion again, and is safe and reliable.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model crossbeam type chain-grate front portion structure schematic representation;

Fig. 2 is the A-A partial sectional view of Fig. 1;

Fig. 3 is the limit fire-grating chip architecture schematic representation that has boss;

Fig. 4 is that the A of Fig. 3 is to view;

Fig. 5 is the elevational cross-sectional view of sealing block;

Fig. 6 is that the B of Fig. 5 is to view;

Fig. 7 is the front view of sealing fixture block;

Fig. 8 is that the C of Fig. 7 is to view;

Shown in Fig. 1-8, Fig. 1 shows anti-clinker box 1 that comprises in the common traveling-grate stoker structure and the direct of travel K that shows chain, and usually major component comprises and adds coal bunker 2, fire grate segment 3, front axle 4, chain 5 and front cross beam 6.The mutual scheme of erection of its sealing configuration has been shown among Fig. 2, fire grate segment near the limit of fire grate side wall plate 11 is the limit fire grate segment 10 that has boss, sealing block 9 and sealing fixture block 7 are loaded on the Lower Half of anti-clinker box 1, and connect with bolt 8, the bottom outermost of described sealing block 9 is protruded downwards, then be inside conocave plane, be the planar base surface that protrudes downwards more inwards, make it to cooperate formation labyrinth sealing with the protrusion position at the top of fire grate segment 10 is about, leak coal to stop, leak slag and prevent that sidepiece from upwards leaking out, the most external plane of described sealing fixture block 7 vertically upward.

Claims

A kind of crossbeam type chain-grate coal leak preventing side-sealing device, it is characterized in that: the fire grate segment near the limit of fire grate side wall plate (11) is the limit fire grate segment (10) that has boss, sealing block (9) and sealing fixture block (7) are loaded on the bottom of anti-clinker box (1), and connect with bolt (8), the bottom outermost of described sealing block (9) is protruded downwards, then be inside conocave plane, make it to cooperate formation labyrinth sealing for the planar base surface that protrudes downwards inwards again with the protrusion position at the top of fire grate segment (10) is about, leak coal leakage slag and prevent that sidepiece from upwards leaking out to stop, the most external plane of described sealing fixture block (7) vertically upward.