CN2204924Y - Lightweight chain furnace grate - Google Patents

Abstract

The utility model discloses a lightweight chain furnace grate, which comprises a coal bucket, a wall plate, a front shaft, a chain wheel arranged on the shaft, a chain belt and a rear cylinder, wherein, the lower part of the coal bucket is provided with a movable coal baffle; the both ends of the rear cylinder are provided with positioning mechanisms for preventing the chain belt positioning; a guide rail is additionally arranged on the bottom plate for reducing the thickness of the bottom plate and the friction force of the chain belt; besides, the length, etc. of the chain belt are properly increased for ensuring sufficient combustion. Meanwhile, the utility model cancels a glede iron and a heavyweight beam. Thereby, the utility model can overcomes the defects that a traditional chain furnace grate has a large metal consumption, high failure rate, etc. The utility model has the advantages of reliable running, low failure rate. The metal consumption is reduced by 30-40% compared with a traditional chain furnace grate, etc.

Description

Lightweight chain furnace grate

The utility model relates to the Industrial Boiler Technology field, especially is applicable to chain grate boiler.

At present, in the Industrial Boiler product of China, the chain fire-gate boiler of adapted accounts for about 70% of sum.In the long term from now on, traveling-grate stoker will be the topmost combustion apparatus of Industrial Boiler.Yet for a long time, the traveling-grate stoker general structure that each producer makes does not have big variation, and exists some significantly problems.First metal consumption is big, in all combustion apparatus of Industrial Boiler adapted, and chain fire-gate metal consumption maximum.The traveling-grate stoker weight of joining thermal power 4.2MW hot-water boiler that Shanghai Sifang Boiler Works produces is 16 tons: the steam boiler traveling-grate stoker weight of allotting power 10t/h is 22 tons, calculates by boiler output, and the required fire grate weight of each ton evaporation capacity is up to more than 2.2 tons; It two is that the retaining coal angle steel of coal bunker bottom adopts bolting, is subjected to big resistance and when arching up, can and causes the fault of breaking chain belt by retaining coal angle steel dieback when chain belt is in service; It three is sprocket wheel location to be arranged on the fire grate front axle and do not have any detent mechanism on the back roll, adjusts improperly if install, and the fire grate chain belt can sideslip and wallboard friction and increase running resistance, even causes the fault of breaking fire grate; Its four large tracts of land when being the chain belt backhaul and base plate sliding friction, resistance is bigger; It five is that wallboard and base plate are to make with the steel plate of monoblock, expends a large amount of metals; It six is that all traveling-grate stokers all are equipped with eagle iron, runs into the strong coal of coking capacity and be easy to eagle iron be overthrown and be forced to blowing out in running, treats to handle after the burner hearth cooling again, has a strong impact on the normal use of equipment.

The purpose of this utility model is to overcome the problem that above-mentioned traveling-grate stoker exists, and provides a kind of and can reduce rate of breakdown, reduction metal wastage, can guarantee the energy-saving and cost-reducing light-duty traveling-grate stoker of long-time normal operation.

For achieving the above object, solution of the present utility model is the fixed stop coal angle steel of cancellation coal bunker (1) bottom, and the spillplate (2) of an activity is set; Prevent the detent mechanism that chain belt departs from the setting of the two ends of back roll (8), wallboard adopts tower structure; Guide rail is set on base plate, and cancellation eagle iron and heavy crossbeam are simultaneously with the length of chain belt and the distance lengthening 6～8% of front axle and back roll.Therefore the utility model comprises coal bunker (1), wallboard (3), front axle and is installed in sprocket wheel (4), chain belt (5), base plate (6), back roll (8) on the front axle, key is, also be provided with movable spillplate (2) in coal bunker (1) bottom, be provided with the detent mechanism (9) that prevents chain belt and depart from back roll (8) two ends, the wallboard of two sides (3) adopts tower structure, goes up along the chain belt direction of motion at base plate (6) and is provided with guide rail; Movable spillplate (2) flexibly connects by threaded pin with the coal bunker madial wall; Fixedly connected and all adopt between detent mechanism (9) and back roll (8), guide rail (7) and the base plate (6).

The utility model has been cancelled fixing retaining coal angle steel because mobilizable spillplate (2) has been installed, and has both blocked the leakage coal, has eliminated the hidden danger of being broken chain belt when chain belt (5) meets obstructions arch by the angle steel dieback again.The cylinder two ends are provided with the detent mechanism that prevents that chain belt from departing from, and can avoid improper because of adjustment is installed again, and chain belt can reach the running resistance that increases with the wallboard friction by sideslip, and energy consumption increases even cause the fault of breaking chain belt.And guide rail is set on the base plate, the frictional resistance when having reduced the chain belt backhaul has significantly reduced energy consumption; Use sheet metal for it steel plate of base plate simultaneously, greatly reduce metal wastage.The intensity while that the wallboard of fire grate two sides (3) has adopted tower structure both to strengthen and supported boiler body has also reduced the metal consumption; In addition, owing to adopt the effective length of chain belt (5) of suitably extending, with cancellation eagle iron and the heavy crossbeam of cast iron, so also use the strong coal of coking capacity and cause the fault of overthrowing eagle iron with regard to thorough the elimination, both guaranteed the abundant burning of coal on fire grate, and also further reduced metal consumption effectively and fire grate structure is further simplified.Therefore, the utlity model has fault rate and energy consumption is low, and more conventional traveling-grate stoker reduces characteristics such as metal consumption 30～40%.

Fig. 1 is a microlight-type traveling-grate stoker structural representation:

Fig. 2 is wallboard (3) and base plate (6) and goes up guide rail position and the structural representation that is provided with:

Fig. 3 is the A-A view

Fig. 4 is arranged on the side view of the movable spillplate (2) of coal bunker (1) bottom.

Embodiment one

Present embodiment is an example with the traveling-grate stoker of joining the 4.2MW hot-water boiler: it is 3mm that the movable spillplate (2) of coal bunker (1) bottom adopts thickness, material is the Q235-AF steel plate, have two kidney slots on it, and with the band cylinder bolt be connected in coal bunker (1) bottom by kidney slot, back roll (8) is No. 20 seamless steel tube for boiler with φ 159 * 7mm material, and the detent mechanism at its two ends is processed into diameter with No. 45 steel and forms detent mechanism (9) for φ 190mm assembles with the same back roll of the boss on 15 ° of inclined-planes (8); Base plate (6) is by behind No. 10 channel-section steel assembly weldings, and being welded with 5 thickness thereon is that 10mm is that 5980mm, material are the guide rail (7) of Q235-AF for 30mm length highly.Wallboard (3) adopts No. 10 channel-section steel assembly weldings to become framework.Front axle and back roll centre-to-centre spacing are 6240mm.Overall length of the present utility model is that 7298mm, width are that 2460mm highly is 1936mm, bulk metal weight is 9874kg, compare (weight 15946kg) with the old product of same specification and save steel 38%, the governing box motor power (output) is 0.37kw during operation, compares (motor power (output) is 1.1kw) economize on electricity 66.36% with the old product of same specification.

Embodiment two

Present embodiment is an example with the traveling-grate stoker of joining the 10t/h steam boiler: its wallboard (3) adopts No. 10 channel-section steel weldering systems to form; Chain belt (5) adopts the active chip fire grate segment of bulk, and material is the HT200 grey cast-iron, and initiatively fire grate segment adopts KTH350-10 malleable cast iron,

Claims (1)

1, a kind of light-duty traveling-grate stoker comprises coal bunker (1), wallboard (3), front axle and is installed in sprocket wheel (4), chain belt (5), base plate (6), back roll (8) on the front axle; It is characterized in that also being provided with movable spillplate (2) in the bottom of coal bunker (1); Also be provided with the detent mechanism (9) that prevents chain belt and depart from the two ends of back roll (8); The wallboard of both sides (3) then is a tower structure; Go up the suitable chain belt direction of motion at base plate (6) and also be provided with guide rail; Movable spillplate (2) flexibly connects by threaded pin with the coal bunker madial wall; Fixedly connected and all adopt between detent mechanism (9) and back roll (8), guide rail (7) and the base plate (6).

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