CN218289204U

CN218289204U - Novel dry slag-discharging cleaning chain scraper

Info

Publication number: CN218289204U
Application number: CN202222606822.7U
Authority: CN
Inventors: 路涛; 薛亚海; 张家祥; 刘烨奇
Original assignee: Shangan Power Plant of Huaneng Power International Inc
Current assignee: Shangan Power Plant of Huaneng Power International Inc
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-13
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a novel dry slag discharging cleans chain scraper, the both ends of scraper blade link to each other with two chains that clean the chain respectively, the scraper blade is perpendicular with the bottom plate below it, the scraper blade is the arc, the sunken one side of scraper blade is perpendicular with the direction of motion of chain, and the line between two chains and the continuous position of scraper blade is perpendicular with the direction of motion of chain. When the chain drives the scraper blade motion, the ash on the bottom plate can gather and draw close to the middle part along the arc surface of the scraper blade, the size difference of the force acting on the chains at the two ends of the scraper blade is reduced, the force acting on the two chains is more uniform, the pulling force borne by the two chains is kept consistent as much as possible, and the phenomenon that the chain is unequal in length due to the fact that the difference of the stress of the chains is large due to unequal ash amount is relieved.

Description

Novel dry slag-discharging cleaning chain scraper

Technical Field

The utility model relates to a coal fired boiler of power plant does slag discharging system equipment, especially relates to a novel dry slag discharging cleans chain scraper blade.

Background

The dry slag discharging system of the power plant has the advantages of water saving, environmental protection and the like, and is widely applied to coal-fired boilers. The dry slag discharging system mainly comprises a steel belt machine, a cleaning chain, a slag crusher, a bucket elevator, a slag bin and the like. The ash slag generated by boiler combustion falls onto the steel belt from the boiler ash hopper, the ash slag contains slag blocks and fine ash, the slag blocks and part of the fine ash are conveyed into the rear slag crusher through the steel belt, and most of the fine ash flows onto the bottom plate at the lower part of the cleaning chain from gaps of the steel belt bearing plate and is conveyed into the slag crusher through the cleaning chain. The cleaning chain is generally composed of two chains which circularly rotate in an annular manner and a scraper arranged between the two chains, and in order to prevent abrasion, a metal part of the scraper is not in direct contact with the bottom plate, but is in contact with the bottom plate through a mounted rubber plate.

Such a cleaning chain has the following problems:

1. because ash falling amount around the hearth is different, ash amount at two sides of the cleaning chain is different, one side is large, and the other side is small, so that abrasion of the chain of the cleaning chain at one side with large ash amount is larger than that at one side with small ash amount, and as a long time passes, the length of the chain at one side with large ash amount is larger than that of the chain at one side with small ash amount due to long-term large pulling force, a scraper is inclined, and the chain is easy to fall off.

2. Because the scraper blade and the chain are fixedly connected, under the action of tension force, a newly installed rubber plate is quickly abraded, the plate cannot be well contacted with the bottom plate after being abraded, a gap is generated, the scraper blade cannot scrape ash away, particularly in the uphill section of the cleaning chain, the fine ash flows down from the gap and cannot be scraped away by the scraper blade, the fine ash is accumulated in the transition section, and chain detachment is caused in severe cases.

The patent of publication No. CN205771489U discloses a multi-chain scraper conveyor and scraper conveyor drag chain thereof, including the scraper blade to and the chain that is connected with the scraper blade, the tip of scraper blade passes through scraper chain connecting piece joint on the chain, the quick dismantlement and the installation of the scraper blade of being convenient for of the structure that this application disclosed, but because the scraper blade is flat-plate-shaped, when the material distributes unevenly, can lead to the chain atress uneven, makes the chain length change uneven, and then makes the scraper blade slope, thereby the easy chain that takes off. The scraper chain for scraper conveyors and the scraper conveyor disclosed in patent publication No. CN113734704A also have the same technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel dry slag discharging cleans chain scraper blade, makes the scraper blade at the during operation, and the power that two chains received is more even to avoid leading to the atress big elongated because of two chains atress differences are too big, leading to the scraper blade slope, causing the chain to drop even.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a novel dry slag discharging cleans chain scraper blade, the both ends of scraper blade link to each other with two chains that clean the chain respectively, the scraper blade is perpendicular with the bottom plate below it, the scraper blade is the arc, the sunken one side of scraper blade is towards the direction of motion of chain, and the line between two chains and the scraper blade continuous position is perpendicular with the direction of motion of chain.

Further, the scraper blade includes base plate, clamp plate, presss from both sides the offset plate of clamp between clamp plate and base plate and two connecting plates of fixed connection at base plate both ends respectively, the connecting plate links to each other with the chain that corresponds, the bottom of base plate and the bottom of clamp plate all are higher than the bottom of offset plate.

Furthermore, the two connecting plates are respectively fixedly connected with the corresponding chains.

Furthermore, the connecting plate is movably connected with the cleaning chain, and the bottom surface of the rubber plate is propped against the upper surface of the bottom plate.

Furthermore, a vertical mounting hole is formed in the connecting plate, two lugs are arranged on the portion, close to the inside, of one chain link of the chain, the connecting plate is clamped between the two lugs, a vertical strip-shaped mounting hole is formed in the connecting plate, a pin shaft penetrates through the mounting hole, the two lugs are in clearance fit with the connecting plate, the pin shaft is in clearance fit with the connecting plate, the pin shaft penetrates through the two lugs, the two lugs are in clearance fit with the pin shaft, and a split pin used for limiting the axial direction of the pin shaft is arranged at the tail of the pin shaft.

Further, the arc height of the scraper is 10-20 cm.

Further, base plate and clamp plate pass through bolt fastening components first and press from both sides the offset plate tightly, bolt fastening components first includes bolt first and nut first, base plate, offset plate and clamp plate all with bolt first through connection, the back is screwed up to nut first, presss from both sides the offset plate tightly between base plate and clamp plate.

The utility model discloses an actively the effect does:

1. the utility model discloses be equipped with curved base plate, offset plate and clamp plate, when the chain drove the scraper blade motion, ash on the bottom plate can be followed the arc of offset plate and gathered and draw close towards the middle part of offset plate, reduces the big or small difference of the power of being used in the chain at scraper blade both ends, makes the power of being used in two chains more even, and the pulling force that makes two chains receive keeps unanimous as far as possible to slow down because the ash volume varies and causes the chain atress difference great to cause the chain inequality greatly.

2. The scraper blade can slide up and down along the chain, and the rubber plate is propped against the upper surface of the bottom plate under the action of gravity. After the offset plate takes place wearing and tearing, scraper blade along chain downstream under the effect of gravity carries out automatic compensation to the wearing and tearing volume of offset plate to guarantee that the offset plate pastes tightly all the time on the bottom plate, make the ash on the bottom plate scraped cleaner.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a partial enlarged view of section II of FIG. 1;

FIG. 3 is a view of the connection plate of FIG. 2 in the direction B;

FIG. 4 is a top view of a prior art squeegee;

FIG. 5 is an enlarged view of a portion I of FIG. 4;

FIG. 6 is a view of the connection plate of FIG. 5 in the direction of A;

in the figure:

1. a chain; 2. a squeegee; 3. a base plate; 4. ash; 5. a substrate; 6. a rubber plate; 7. pressing a plate; 8. a connecting plate; 9. A bolt fastening assembly A; 10. mounting holes; 11. a pin shaft; 12. a cotter pin; 13. and a bolt fastening assembly B.

Detailed Description

As shown in fig. 4 to 6 (the arrow direction in fig. 4 is the moving direction of the chain 1), the scraper 2 used in the conventional dry-type slag-removing cleaning chain comprises a base plate 5, a rubber plate 6 and a pressing plate 7 which are sequentially stacked, the base plate 5, the rubber plate 6 and the pressing plate 7 are fastened by a plurality of bolt fastening assemblies b 13 distributed along the length direction of the base plate 5, and the base plate 5, the rubber plate 6 and the pressing plate 7 are all perpendicular to the chain 1. The base plate 5, the rubber plate 6 and the pressing plate 7 are all rectangular, and a bolt B in the bolt fastening assembly B13 penetrates through the base plate 5, the rubber plate 6 and the pressing plate 7 in sequence and then is fastened by a nut B screwed at the tail part of the bolt B, so that the base plate 5, the rubber plate 6 and the pressing plate 7 are fastened together. Rectangular connecting plates 8 are welded at two ends of the base plate 5 respectively, and circular mounting holes 10 are punched in the connecting plates 8. The cleaning chain 1 has one link with middle part broken and two lugs extending inwards and with bolt fastening assembly A9. The bolt A of the bolt fastening assembly A9 is arranged on two lugs in a penetrating mode, and the connecting plate 8 is clamped between the two lugs. After the nut A of the bolt fastening assembly A9 is screwed, the connecting plate 8 is clamped between the two lugs, so that the chain 1 is fixedly connected with the scraper 2.

As shown in fig. 4, the ash 4 falling on the bottom plate 3 increases gradually from left to right, so when the scraper 2 moves along the arrow direction, the pulling force applied to the right chain 1 is greater than the pulling force applied to the left chain 1, and thus the right chain 1 can become longer after long-time operation, so that the scraper 2 is no longer perpendicular to the chain 1, so that the scraper 2 and the chain 1 form an included angle, the right end of the scraper 2 lags behind the left end, and therefore the ash 4 slides to the right along the scraper 2, so that the force applied to the right chain 1 is greater, thereby generating vicious circle, and making the right chain 1 longer and longer, so that the chain 1 is easy to fall off from the chain wheel, and the inclination angle of the scraper 2 is also larger and larger, and the ash 4 is scraped to the right side and even slides off from the bottom plate 3.

Example 1

As shown in fig. 1, the present embodiment is different from the conventional squeegee 2 in that:

the scraper blade 2 is perpendicular with bottom plate 3 below it, the scraper blade 2 is the arc, 2 sunken one side of scraper blade are towards the direction of motion of chain 1, and the line between two chains 1 and 2 continuous positions of scraper blade is perpendicular with the direction of motion of chain 1, the bottom of base plate 5 and the bottom of clamp plate 7 all are higher than the bottom of offset plate 6.

Because the rubber plate 6 is arc-shaped, the ash 4 can gather and draw close to the middle part of the rubber plate 6 along the arc-shaped surface of the rubber plate 6, the difference of the forces acting at the two ends of the scraper 2 is reduced, the pulling forces borne by the two chains 1 are kept consistent as much as possible, and the phenomenon that the chains are unequal in length due to the fact that the stress difference of the chains 1 is large due to unequal ash amount is relieved.

Example 2

As shown in fig. 2 and 3, the present embodiment is different from embodiment 1 in that:

1. the connecting plate 8 is movably connected with the cleaning chain, and the bottom surface of the rubber plate 6 is propped against the upper surface of the bottom plate 3.

2. The mounting hole 10 is vertically long.

3. The mounting hole 10 is internally provided with a pin shaft 11 in a penetrating manner, the two lugs are in clearance fit with the connecting plate 8, the pin shaft 11 is arranged on the two lugs in a penetrating manner, the two lugs are in clearance fit with the pin shaft 11, and the tail part of the pin shaft 11 is provided with a split pin 12 for limiting the pin shaft in the axial direction.

Under the action of gravity, the rubber plate 6 on the scraper 2 is abutted against the bottom plate 3. After the offset plate 6 takes place wearing and tearing, scraper blade 2 moves down along the lug under the effect of gravity, carries out automatic compensation to the wearing and tearing volume of offset plate 6 to guarantee that offset plate 6 pastes closely on bottom plate 3 all the time, what make on the bottom plate 3 ash 4 was scraped is cleaner.

Example 3

The present embodiment is different from embodiment 1 in that:

the blade 2 has an arc height of 10 to 20 cm. Tests show that when the arc height of the scraper blade 2 is 13 cm (the length of the scraper blade 2 is 1.5 m), the effect is best, the ash 4 can be gathered towards the middle of the scraper blade 2, the ash 4 can be prevented from being gathered too fast and too concentrated on the bottom plate 3, and the phenomenon of material leakage caused by the inclination of the bottom of the scraper blade 2 when the middle of the scraper blade is stressed too much is avoided.

The above-mentioned embodiments are described in detail and specifically, so as to explain the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the present invention, and the scope of the present invention should not be limited by the embodiment, i.e. all equivalent changes or modifications made by the spirit of the present invention, for researchers or technicians in the field, within the structure of the present invention, the local modifications inside the system and the changes, transformations, etc. between the subsystems are still within the scope of the present invention. At present, the technical scheme of the application has been subjected to a pilot plant test, namely a small-scale experiment before large-scale mass production of products; after the pilot test is finished, the investigation for the use of the user is carried out in a small range, and the investigation result shows that the satisfaction degree of the user is higher; the preparation of products for formal production for industrialization, including intellectual property risk early warning research, has been set forth.

Claims

1. The utility model provides a novel dry slag discharging cleans chain scraper blade, its characterized in that, the both ends of scraper blade (2) link to each other with two chains (1) that clean the chain respectively, scraper blade (2) are perpendicular with bottom plate (3) below it, scraper blade (2) are the arc, the sunken one side of scraper blade (2) is towards the direction of motion of chain (1), and the line between two chains (1) and the continuous position of scraper blade (2) is perpendicular with the direction of motion of chain (1).

2. The scraper blade of claim 1, wherein the scraper blade (2) comprises a base plate (5), a pressing plate (7), a rubber plate (6) clamped between the pressing plate (7) and the base plate (5), and two connecting plates (8) fixedly connected to two ends of the base plate (5), the connecting plates (8) are connected to the corresponding chains (1), and the bottom of the base plate (5) and the bottom of the pressing plate (7) are higher than the bottom of the rubber plate (6).

3. The scraper of claim 2, characterized in that the two connecting plates (8) are fixedly connected to the corresponding chains (1).

4. The scraper of claim 2, characterized in that the connecting plate (8) is movably connected with the cleaning chain, and the bottom surface of the rubber plate (6) is abutted against the bottom plate (3).

5. The novel dry slag removal cleaning chain scraper blade as claimed in claim 4, wherein a vertical mounting hole (10) is formed in the connecting plate (8), two lugs are formed in the inner part of one of the chain links of the chain (1), the connecting plate (8) is clamped between the two lugs, a vertical strip-shaped mounting hole (10) is formed in the connecting plate (8), a pin shaft (11) penetrates through the mounting hole (10), the two lugs are in clearance fit with the connecting plate (8), the pin shaft (11) is in clearance fit with the connecting plate (8), the pin shaft (11) penetrates through the two lugs, the two lugs are in clearance fit with the pin shaft (11), and a split pin (12) for axially limiting the pin shaft (11) is arranged at the tail part of the pin shaft (11).

6. The scraper of claim 1, characterized in that the height of the scraper (2) is 10-20 cm.

7. The novel dry slag removal cleaning chain scraper blade as claimed in claim 2, wherein the base plate (5) and the pressing plate (7) clamp the rubber plate (6) through a bolt fastening assembly A (9), the bolt fastening assembly A (9) comprises a bolt A and a nut A, the base plate (5), the rubber plate (6) and the pressing plate (7) are all connected with the bolt A in a penetrating manner, and after the nut A is screwed, the rubber plate (6) is clamped between the base plate (5) and the pressing plate (7).