A floating chain for buried scraper coal feeder

Abstract

The present application provides a new type of floating chain for a buried scraper coal feeder, including a machine trough, which is a U-shaped groove structure, a scraping mechanism, which is slidably installed on the inside of the machine trough, and includes a rectangular scraper. Multiple groups of rectangular scrapers are installed one by one by bolts, and the rectangular scrapers are pulled to scrape and clean the inside of the machine trough. The front and rear ends of the rectangular scrapers are both installed with anti-drifting scrapers by bolts. The hanging bar of the present invention is a scraper that protrudes 10-15mm from the bottom of the scraper. The cloth-reinforced rubber material has good cleaning function. Its good flexibility and elasticity can avoid the occurrence of chain jamming caused by the protrusion of the box body. The side connecting rods are two auxiliary reinforcement bars. The sliding friction of the rectangular scraper is converted into rolling friction through the side pulleys, and the position of the anti-drifting scraper can be centered and guided to improve the stability of the structure. Even if the side pulleys scratch the box body, it will not affect the chain.

Description

Technical Field

[0001] The invention relates to the field of coal cleaning, in particular to a floating chain of a buried scraper coal feeder. Background Art

[0002] Embedded scraper conveyors, first introduced in the 1920s, have matured in theory, design, manufacturing, and even application, becoming a widely used bulk material conveying equipment. They primarily consist of a closed-section housing (trough), scraper chain, drive unit, tensioning device, and safety devices. They offer a simple structure, compact size, excellent sealing, and easy installation and maintenance. They can be loaded and unloaded at multiple locations, offering flexible process selection and layout. They can improve working conditions and reduce environmental pollution when conveying materials that are volatile, toxic, hot, flammable, or explosive.

[0003] The mixed fuel in the coal bunker is transported to the buried scraper coal feeder through a fully enclosed belt weighing coal feeder. The scraped fuel enters the circulating fluidized bed boiler through two drop ports in front of and behind the furnace for combustion.

[0004] The inventors of this application discovered that the above technology has at least the following technical problems during the process of scraper cleaning machine slots:

[0005] 1. From the perspective of the scraper chain structure, there is a 72mm wide area in the middle of the scraper chain, which is the scraping dead zone of the anti-drift scraper. The finer, more easily sticky raw coal is squeezed by the trough box, scraper and chain in this area, forming a layer of hard accumulation layer that supports the scraper chain. At the same time, the hard accumulation layer rubs against the scraper chain handle, causing the position of the anti-drift scraper and rectangular scraper to gradually rise. The load of the coal feeder increases significantly under the combined effects of increased tension, friction and the pulling back of raw coal, eventually causing the scraper chain to break and be damaged.

[0006] 1. When the scraper feeder is blocked by coal, a large amount of coal accumulates inside the scraper feeder after it stops operating. The cleaning work is very heavy and time-consuming. In addition to increasing the workload, it also causes the scraper feeder to be unable to operate normally, affecting the power generation of the unit;

[0007] Therefore, we propose a floating chain for buried scraper coal feeder to solve the above problems. Summary of the Invention

[0008] The main purpose of the present invention is to provide a floating chain for a buried scraper coal feeder, which can effectively solve the problems in the background technology.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A floating chain of a buried scraper coal feeder, comprising: a machine slot, wherein the machine slot is a U-shaped groove structure,

[0011] The scraping mechanism is slidably installed on the inner side of the machine slot and includes a rectangular scraper. Multiple groups of rectangular scrapers are installed one by one by bolts, and the ends are connected to the pulling equipment on the outside. The rectangular scraper is pulled to scrape and clean the inside of the machine slot. The front and rear ends of the rectangular scraper are both installed with anti-drifting scrapers by rotating bolts.

[0012] Preferably, the rectangular scraper includes a main structural plate, which is a T-shaped structural block. The two side wings of the main structural plate are used to scrape the inside of the machine groove. The raised front section in the middle of the main structural plate is provided with a rear connecting block, and the other end in the middle of the main structural plate is provided with a front connecting block, wherein the rear connecting block of the front section is inserted into the front connecting block of the rear section, and is rotated and connected by bolts to realize fixed connection of multiple groups of rectangular scrapers.

[0013] Preferably, a bottom slot is provided at the bottom below the main structure plate. The bottom slot is a triangular broken arch block with a thickness of 5 mm. When the scraper is worn, it is used to plow the dead area of ​​the scraper and support the scraper so that its middle part is convex.

[0014] Preferably, the anti-drift scraper includes a scraper seat, which is a T-shaped structural block. The two side wings of the scraper seat are used to scrape the inside of the machine groove. The front section of the middle protrusion of the scraper seat is provided with an upper connecting block, and the other end of the middle of the scraper seat is provided with a lower connecting block, wherein the upper connecting block of the front section is inserted into the lower connecting block of the rear section, and is rotatably connected by bolts to realize fixed connection of multiple groups of anti-drift scrapers.

[0015] Preferably, a hanging bar is provided on the outside of the scraper seat, and the hanging bar is a scraper blade protruding 10-15 mm from the bottom of the scraper. The scraper blade is made of waste rubber conveyor belt and is replaced regularly. The scraper blade is used to clean the uneven bottom of the box, especially the coal accumulation in the dead zone below the chain handle. The cloth-reinforced rubber material has a good cleaning function, and its good flexibility and elasticity can avoid the occurrence of chain jamming due to the bulge of the box body.

[0016] Preferably, two sets of side connecting rods are provided between the scraper seat and the upper connecting block. The side connecting rods are two auxiliary reinforcing bars. When the amount of coal on the two scrapers is inconsistent and the chain tension is insufficient, the chain is prone to deviate to one side and scratch the box body, which may cause the chain plate to break in severe cases.

[0017] Preferably, side pulleys are rotatably installed on both sides of the scraper seat, and the sliding friction of the rectangular scraper is converted into rolling friction through the side pulleys. The position of the anti-drift scraper can be guided to the center to improve the stability of the structure. Even if the side pulleys scratch the box, they will not affect the chain.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The rear connecting block of the front section is inserted into the front connecting block of the rear section and is rotated by bolts to achieve fixed connection of multiple sets of rectangular scrapers. The bottom slot is a triangular arch block with a thickness of 5mm. When the scraper is worn, it is used to plow the dead area of ​​the scraper and support the scraper so that its middle part is convex.

[0020] 2. The hanging strip is a scraper that protrudes 10-15mm from the bottom of the scraper. The scraper is made of waste rubber conveyor belts and is replaced regularly. The scraper is used to clean the uneven bottom of the box, especially the coal accumulation in the dead zone below the chain handle. The cloth-reinforced rubber material has good cleaning function. Its good flexibility and elasticity can avoid chain jamming caused by the protrusion of the box body. The side connecting rods are two auxiliary reinforcement bars. When the amount of coal on the two scrapers is inconsistent and the chain tension is insufficient, the chain tends to scratch the box body to one side, which may cause the chain plate to break in severe cases. The side pulley is used to convert the sliding friction of the rectangular scraper into rolling friction, and the position of the anti-drift scraper can be centered and guided to improve the stability of the structure. Even if the side pulley scratches the box body, it will not affect the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall structural diagram of a floating chain of a buried scraper coal feeder in Example 1;

[0022] Figure 2 This is a top view of the floating chain of a buried scraper coal feeder according to Example 1;

[0023] Figure 3 This is a structural diagram of a rectangular scraper in a floating chain of a buried scraper coal feeder in Example 1;

[0024] Figure 4 This is an overall structural diagram of a floating chain of a buried scraper coal feeder in Example 2;

[0025] Figure 5 This is a top view of the structure of a scraping mechanism in a floating chain of a buried scraper coal feeder according to Example 2;

[0026] Figure 6 This is a side structural diagram of a scraping mechanism in a floating chain of a buried scraper coal feeder according to Example 2;

[0027] Figure 7 This is a three-dimensional structural diagram of an anti-drifting scraper in a floating chain of a buried scraper coal feeder in Example 2.

[0028] In the figure: 1. machine slot; 2. pull rod; 3. rectangular scraper; 31. main structure plate; 32. rear connecting block; 33. front connecting block; 34. bottom slot; 4. side connecting block; 5. anti-drifting scraper; 51. scraper seat; 52. upper connecting block; 53. side connecting rod; 54. side pulley; 55. lower connecting block; 56. hanging bar. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] On-site measurements show that the thickest coal seam reaches 400mm. The thickened coal seam gradually expands to the bottom of the entire box, resulting in increased tension of the scraper chain, increased friction between the scraper and the accumulated coal seam, and reduced distance between the coal seam and the upper track. The upper raw coal is pulled back and rolled by the rotating scraper. The load of the coal feeder increases significantly under the combined effects of increased tension, friction and the pulled-back raw coal, eventually causing the scraper chain to break and be damaged.

[0031] Although pressure wheels have been installed at intervals inside the box to press the chain and force the scraper chain not to float, the pressure wheel shaft may break due to the huge upward force.

[0032] The mechanism of floating chain generation has been clarified, and solutions are being explored to improve the safety, reliability, and economy of unit operation. Therefore, it is necessary to design and manufacture new anti-floating scrapers to loosen hard deposits and automatically clean the bottom coal.

[0033] Coal accumulation in the scraper feeder significantly disturbs furnace combustion, affecting the boiler's load output at best and even causing the boiler to extinguish at worst. Furthermore, when the scraper feeder is blocked, a large amount of coal accumulates inside the scraper feeder after it stops operating. Cleaning it up is arduous and time-consuming, increasing the workload and affecting the unit's power generation due to the scraper feeder's inability to operate normally.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 As shown, a floating chain of a buried scraper coal feeder includes: a machine slot 1, wherein the machine slot 1 is a U-shaped groove structure,

[0036] The scraping mechanism is slidably mounted on the inner side of the machine slot 1 and includes a rectangular scraper 3. Multiple groups of rectangular scrapers 3 are connected one by one by bolts, and the ends are connected to the pulling device on the outside. The rectangular scraper 3 is pulled to scrape and clean the inside of the machine slot 1.

[0037] A pull bar 2 is provided in the middle of the machine slot 1, which guides the movement of the rectangular scraper 3 in the middle to avoid bias and improve the stability of the scraper movement. A side connecting block 4 is provided at the tail of the rectangular scraper 3, which is fixedly connected to the end equipment through the side connecting block 4.

[0038] like Figure 3 As shown, the rectangular scraper 3 includes a main structural plate 31, which is a T-shaped structural block. The two side wings of the main structural plate 31 are used to scrape the inside of the machine slot 1. The front section of the central raised portion of the main structural plate 31 is provided with a rear connecting block 32, and the other end of the central portion of the main structural plate 31 is provided with a front connecting block 33, wherein the front connecting block 33 of the front section is inserted into the bottom card slot 34 of the rear section, and is rotatably connected by bolts to achieve fixed connection of multiple groups of rectangular scrapers 3.

[0039] A bottom card slot 34 is provided at the bottom below the main structure plate 31. The bottom card slot 34 is a triangular broken arch block with a thickness of 5 mm. When the scraper is worn, it is used to plow the dead area of ​​the scraper and support the scraper so that its middle part is convex.

[0040] Example 2

[0041] Reference Figure 4-6 As shown, a floating chain of a buried scraper coal feeder includes: a machine slot 1, wherein the machine slot 1 is a U-shaped groove structure,

[0042] The scraping mechanism is slidably mounted on the inner side of the machine slot 1 and includes a rectangular scraper 3. Multiple groups of rectangular scrapers 3 are connected one by one by bolts, and the ends are connected to the pulling device on the outside. The rectangular scraper 3 is pulled to scrape and clean the inside of the machine slot 1.

[0043] like Figure 3 As shown, the rectangular scraper 3 includes a main structural plate 31, which is a T-shaped structural block. The two side wings of the main structural plate 31 are used to scrape the inside of the machine slot 1. The front section of the central raised portion of the main structural plate 31 is provided with a rear connecting block 32, and the other end of the central portion of the main structural plate 31 is provided with a front connecting block 33, wherein the rear connecting block 32 of the front section is inserted into the front connecting block 33 of the rear section, and the rotation connection is carried out by bolts to realize the fixed connection of multiple groups of rectangular scrapers 3.

[0044] The bottom of the main structure plate 31 is provided with a bottom slot 34. The bottom slot 34 is a triangular broken arch block with a thickness of 5mm. When the scraper is worn, it is used to plow the dead zone of the scraper and support the scraper so that its middle part is convex.

[0045] like Figure 7As shown, the front and rear ends of the rectangular scraper 3 are both rotatably mounted with anti-drifting scrapers 5 by bolts, and the anti-drifting scraper 5 includes a scraper seat 51, which is a T-shaped structural block. The two side wings of the scraper seat 51 are used to scrape the inside of the machine slot 1. The raised front section of the scraper seat 51 is provided with an upper connecting block 52, and the other end of the middle of the scraper seat 51 is provided with a lower connecting block 55, wherein the upper connecting block 52 of the front section is inserted into the lower connecting block 55 of the rear section, and is rotatably connected by bolts to achieve fixed connection of multiple groups of anti-drifting scrapers 5.

[0046] A hanging bar 56 is provided on the outside of the scraper seat 51. The hanging bar 56 is a scraper blade that protrudes 10-15 mm from the bottom of the scraper. The scraper blade is made of waste rubber conveyor belt and is replaced regularly. The scraper blade is used to clean the uneven bottom of the box, especially the coal accumulation in the dead zone below the chain handle. The cloth-reinforced rubber material has good cleaning function. Its good flexibility and elasticity can avoid the occurrence of chain jamming caused by the bulge of the box body.

[0047] Two sets of side connecting rods 53 are provided between the scraper seat 51 and the upper connecting block 52. The side connecting rods 53 are two auxiliary reinforcement bars. When the amount of coal on the two scrapers is inconsistent and the chain tension is insufficient, the chain is prone to deviate to one side and scratch the box body, which may cause the chain plate to break in severe cases.

[0048] The scraper seat 51 has side pulleys 54 rotatably installed on both sides. The side pulleys 54 can convert the sliding friction of the rectangular scraper 3 into rolling friction, and can guide the position of the anti-drift scraper 5 to the center, thereby improving the stability of the structure. Even if the side pulleys 54 scratch the box, they will not affect the chain.

[0049] The working principle of the present invention is:

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A floating chain of a buried scraper coal feeder, comprising a machine trough (1), characterized in that: The machine slot (1) is a U-shaped groove structure. The scraping mechanism is slidably mounted on the inner side of the machine trough (1), and comprises a rectangular scraper (3). A plurality of groups of rectangular scrapers (3) are mounted and connected one by one by bolts. The rectangular scrapers (3) are pulled to scrape and clean the inside of the machine trough (1). The front and rear ends of the rectangular scrapers (3) are both rotatably mounted with anti-drifting scrapers (5) by means of bolts. The rectangular scraper (3) includes a main structural plate (31), the main structural plate (31) is a T-shaped structural block, and the two side wings of the main structural plate (31) are used to scrape the inside of the machine slot (1). The front section of the middle convex portion of the main structural plate (31) is provided with a rear connecting block (32), and the other end of the middle portion of the main structural plate (31) is provided with a front connecting block (33), wherein the rear connecting block (32) of the front section is inserted into the front connecting block (33) of the rear section, and the rotation connection is performed by bolts, thereby achieving fixed connection of multiple groups of rectangular scrapers (3); A bottom slot (34) is provided at the bottom below the main structural plate (31). The bottom slot (34) is a triangular broken arch block with a thickness of 5 mm. When the scraper is worn, it is used to plow the dead zone of the scraper and support the scraper so that its middle part is raised. The anti-drifting scraper (5) includes a scraper seat (51), which is a T-shaped structural block. The two side wings of the scraper seat (51) are used to scrape the inside of the machine groove (1). The front section of the scraper seat (51) is provided with an upper connecting block (52), and the other end of the middle section of the scraper seat (51) is provided with a lower connecting block (55). The upper connecting block (52) of the front section is inserted into the lower connecting block (55) of the rear section, and the rotation connection is achieved by bolts, thereby realizing fixed connection of multiple groups of anti-drifting scrapers (5).

2. The floating chain of a buried scraper coal feeder according to claim 1, characterized in that: A hanging bar (56) is provided on the outside of the scraper seat (51), and the hanging bar (56) is a scraper blade protruding 10-15 mm from the bottom of the scraper.

3. The floating chain of a buried scraper coal feeder according to claim 2, characterized in that: Two groups of side connecting rods (53) are provided between the scraper seat (51) and the upper connecting block (52), and the side connecting rods (53) are two auxiliary reinforcement bars.

4. The floating chain of a buried scraper coal feeder according to claim 3, characterized in that: Side pulleys (54) are rotatably mounted on both sides of the scraper seat (51), and the sliding friction of the rectangular scraper (3) is converted into rolling friction through the side pulleys (54).

Images