Coal dust blocking mechanism for scraper and dust blocking method thereof

Abstract

The application discloses a coal dust blocking mechanism for a scraper and a dust blocking method thereof, relates to the technical field of scrapers, and comprises a rack, the inner side of a supporting bearing is provided with a preliminary dust blocking mechanism, the inside of the preliminary dust blocking mechanism comprises a static disc, a labyrinth dynamic disc, a compressed packing brush and a dust discharging port, static discs are embedded and installed on the two sides of the surface of the rack, the labyrinth dynamic disc is arranged on one side of the static disc, the surface of the rotating shaft is sleeved with the compressed packing brush, the dust discharging ports are formed on the two sides of the surface of the rack, and the surface of the preliminary dust blocking mechanism is provided with a split labyrinth dust blocking mechanism; the risk that the lubricating cavity of the supporting bearing is damaged due to dust invasion can be reduced, dust remaining in the ring-shaped groove can be cleaned, the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth dust blocking mechanism is realized, automatic water control is realized, the labor intensity of workers is reduced, and the cost is relatively low.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, specifically to a dust-blocking mechanism for pulverized coal used in scraper conveyors and a dust-blocking method thereof. Background Technology

[0002] Currently, trough-type scraper conveyors are widely used in coal mines and non-coal mines in China for transporting bulk materials. However, in coal mines, the head, tail sprockets, and main shaft of the trough-type scraper conveyor collide and squeeze with the (mixed coal) material irregularly. This inevitably causes small particles or powdery materials to enter along the gaps on the shaft surface, damaging the soft rubber slide grease seals and invading the bearing housing. This causes the grease to mix with the coal powder, resulting in poor bearing lubrication. Over time, this leads to frequent bearing damage, affecting production and increasing maintenance workload. Summary of the Invention

[0003] This application provides a coal powder dust blocking mechanism and method for scraper conveyors, which solves the problem of bearing damage caused by small particles or powdery goods entering the bearing housing in the prior art. It reduces the risk of bearing damage caused by dust intrusion into the lubrication cavity of the supporting bearing. It can clean the dust trapped inside the annular groove, preventing dust from accumulating inside the annular groove. It realizes the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth dust blocking mechanism, realizes automatic water control, reduces the labor intensity of workers, and has a low cost.

[0004] This application provides a coal powder dust blocking mechanism for a scraper conveyor, including a frame. A rotating shaft is disposed on the surface of the frame. Bearing seats are fixed on both sides of the frame surface. Support bearings are installed inside the bearing seats and are fitted onto the surface of the rotating shaft. A preliminary dust blocking mechanism is disposed inside the support bearings. The preliminary dust blocking mechanism includes a stationary disc, a labyrinth rotating disc, a compression packing brush, and a dust discharge port. Stationary discs are embedded on both sides of the frame surface and are located inside the support bearings. A stationary disc is fitted onto the surface of a rotating shaft. A labyrinth rotating disc is provided on one side of the stationary disc and is fixed to the surface of the rotating shaft. A compression packing brush is fitted onto the surface of the rotating shaft and is located on one side of a supporting bearing. Dust vents are provided on both sides of the frame surface and are located between the labyrinth rotating disc and the bearing seat. A split labyrinth dust venting mechanism is provided on the surface of the preliminary dust blocking mechanism. The split labyrinth dust venting mechanism consists of an annular groove and a connecting ring. The annular groove is located on one side of the stationary disc, and the connecting ring is fixed to the surface of the labyrinth rotating disc.

[0005] Preferably, the central axis of the annular groove coincides with the central axis of the rotating shaft, the connecting ring has a conical structure, the central axis of the connecting ring coincides with the central axis of the labyrinth moving plate, the split labyrinth dust-blocking mechanism also includes a rotating ring, the annular groove is provided with a rotating ring, the rotating ring and the annular groove rotate and cooperate with each other, and the cross-section of the rotating ring and the annular groove are both trapezoidal structures.

[0006] Preferably, the split labyrinth dust-blocking mechanism further includes an insert ring, a positioning pin, and a positioning hole. An insert ring is fixed on one side of the connecting ring, and the insert ring and the rotating ring are interlocked. A positioning hole is provided on the surface of the insert ring along the circumferential direction. A positioning pin is fixed on the inner wall of the rotating ring along the circumferential direction, and the positioning pin and the positioning hole are interlocked.

[0007] Preferably, the split labyrinth dust-blocking mechanism further includes a cleaning mechanism, which includes a dust discharge channel, a support spring, and a scraper. The dust discharge channel is located at the bottom of the stationary disc, and the inner wall of the dust discharge channel is rotatably connected to the scraper. The surface of the scraper is in contact with the surface of the rotating ring, and a support spring is fixed between the scraper and the dust discharge channel.

[0008] Preferably, the cleaning mechanism further includes a cleaning brush, a groove, and a slide bar. The groove is formed on the surface of the rotating ring, and the slide bar is slidably disposed inside the groove. When the slide bar is fully inserted into the groove, the slide bar and the groove are engaged with each other by a locking block. The cleaning brush is adhered to the surface of the slide bar, and the surface of the cleaning brush is in contact with the inner wall of the annular groove.

[0009] Preferably, the preliminary dust-blocking mechanism further includes an automatic spraying mechanism, which includes a spraying component and a magnetic sheet. The magnetic sheet is circumferentially embedded on the surface of the rotating ring, and the spraying component is disposed inside the stationary disc. The spraying component and the magnetic sheet are correspondingly arranged.

[0010] Preferably, the spray assembly includes a water storage cavity, a first sealing ball, a magnetic ball, a water outlet, a guide rod, a water inlet pipe, and a return spring. The water storage cavity is located inside the top of the stationary plate and has a gourd-shaped structure. The water outlet is located inside the water storage cavity. The water inlet pipe is fixed to the surface of the stationary plate and is connected to the water storage cavity. The guide rod is located inside the stationary plate, with one end penetrating the water storage cavity and fixed with a magnetic ball. The magnetic ball is located inside the annular groove and has the same pole as the magnetic sheet. A return spring is fitted on the surface of the top of the guide rod, with both ends of the return spring fixedly connected to the guide rod and the inner wall of the stationary plate, respectively. The first sealing ball is fitted on the guide rod, and under normal conditions, the first sealing ball covers the water outlet of the water storage cavity.

[0011] Preferably, the spray assembly further includes a second sealing ball, which is disposed above the first sealing ball and is fixed on the guide rod. When the magnetic sheet approaches the magnetic ball, the second sealing ball blocks the water inlet.

[0012] Preferably, the automatic sprinkler mechanism further includes an automatic water control mechanism, which consists of a float, a baffle, a sliding rod, a connecting rod, and a slide rail. The float is sleeved on the surface of the guide rod, and sliding rods are inserted on both sides of the surface of the float. One end of the sliding rod is fixedly connected to the surface of the guide rod. The slide rail is fixed to the inner wall of the water storage cavity. A baffle for blocking the water inlet pipe is slidably provided on the surface of the slide rail. One end of the baffle is rotatably connected to a connecting rod, and one end of the connecting rod is rotatably connected to one side of the float.

[0013] A method for dust suppression of pulverized coal in a scraper conveyor, in conjunction with the aforementioned dust suppression mechanism for a scraper conveyor, the method comprising:

[0014] S1: A preliminary dust-blocking mechanism is set inside the frame to completely isolate the bearing housing from the material and fix the labyrinth disc on the surface of the rotating shaft.

[0015] S2: When the maze moving plate is assembled with the stationary plate, push the maze moving plate to make the maze moving plate drive the connecting ring to rotate along the annular groove;

[0016] S3: Before assembling the maze moving plate and the stationary plate, first insert the slide bar into the slide groove, then push the slide bar to make the cleaning brush contact the inner wall of the annular groove. At the same time, the cleaning brush is fixed by the locking action of the slide bar and one end of the slide groove.

[0017] S4: Under normal conditions, the first sealing ball blocks the outlet of the water storage chamber. When the rotating ring rotates, it drives the magnetic plate embedded on its surface to rotate synchronously. When the magnetic plate rotates close to the magnetic ball, since the magnetic ball and the magnetic plate have the same pole, the magnetic plate pushes the magnetic ball upward, causing the first sealing ball to move away from the outlet. At this time, the water inside the water storage chamber sprays out. When the magnetic plate moves away from the magnetic ball, the magnetic ball is reset under the action of the return spring, blocking the outlet of the water storage chamber. At the same time, when the first sealing ball moves upward, it drives the second sealing ball to move upward synchronously, causing the second sealing ball to block the water outlet.

[0018] S5: The float plate floats on the horizontal surface inside the water storage cavity under its own buoyancy. When the automatic spraying mechanism sprays, the liquid volume inside the water storage cavity decreases. At this time, the float plate slides down along the slide bar as the liquid volume decreases, pulling the connecting rod and causing the connecting rod to drive the baffle to slide along the slide rail. The baffle opens the water inlet pipe, allowing water to automatically flow into the water storage cavity through the water inlet pipe. Similarly, at this time, the float plate moves upward as the water volume increases, causing the baffle to block the water inlet pipe.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0020] By adopting a preliminary dust blocking mechanism, a split labyrinth dust blocking mechanism, a cleaning mechanism, an automatic spraying mechanism, and an automatic water control mechanism, the rotating shaft is lengthened and a preliminary dust blocking mechanism is added inside the frame. The bearing seat is moved outward to completely isolate it from the material. The labyrinth moving disc is fixed on the surface of the rotating shaft and rotates with the shaft. Under normal circumstances, most dust and particulate matter are blocked by the labyrinth moving disc. Once the ultrafine dust passes through the labyrinth moving disc and the stationary disc, some of the dust falls along the stationary disc to the dust discharge port and is discharged through the dust discharge port. At the same time, under the action of the compression packing brush, some of the ultrafine dust that falls to the side of the compression packing brush can be brushed off.

[0021] When the labyrinth moving plate and the stationary plate are assembled, the labyrinth moving plate can be pushed, causing the labyrinth moving plate to drive the insert ring to insert into the rotating ring, so that the positioning card hole fits onto the surface of the positioning card post. When the labyrinth moving plate rotates, it drives the insert ring to rotate synchronously, causing the rotating ring to rotate inside the annular groove. When ultrafine dust enters the gap between the labyrinth moving plate and the stationary plate, most of the ultrafine dust can be blocked under the action of the insert ring and the rotating ring. At the same time, since the connecting ring has a conical structure, some ultrafine dust falls to the angle between the connecting ring and the labyrinth moving plate under the action of gravity, and falls with the rotation of the connecting ring. Since the cross-section of the annular groove and the rotating ring are both trapezoidal, it further prevents ultrafine dust from entering the bottom of the annular groove.

[0022] Before assembling the maze moving plate and the stationary plate, insert the slider into the groove, then push the slider to install the cleaning brush on the surface of the rotating ring, so that the cleaning brush contacts the inner wall of the annular groove. At the same time, the cleaning brush is fixed by the locking action of the slider and one end of the groove. When in use, the rotating ring rotates, causing the cleaning brush to rotate synchronously, so that the cleaning brush can clean the ultrafine dust trapped in the annular groove and make it fall into the dust discharge channel. At the same time, when in use, the scraper contacts the surface of the rotating ring under the elastic force of the support spring, which can scrape off the dust attached to the surface of the rotating ring and prevent dust from accumulating in the annular groove.

[0023] Under normal conditions, the first sealing ball seals the outlet of the water storage chamber. When the magnetic plate rotates with the rotating ring and approaches the magnetic ball, because the magnetic ball and the magnetic plate have the same pole, the magnetic plate can push the magnetic ball upward, causing the first sealing ball to move away from the outlet. At this time, water inside the water storage chamber sprays out, spraying the surfaces of the rotating ring and the insert ring. This water mixes with dust in the air, increasing the gravity of the dust and making it less likely for the dust to fly into the annular groove. Simultaneously, the water flow further slows down the speed at which ultrafine dust enters the annular groove. During use, the rotating ring... The rotating ring is in a rotating state while the annular groove is stationary. This allows the water sprayed onto the surface of the rotating ring to rotate with it, ensuring even distribution. Under the centrifugal force of the rotating ring, the water is thrown to the inner wall of the annular groove, causing dust to fall upon contact with the water. The dust can then be brushed off by the cleaning brush and sent into the dust discharge channel. The dust adhering to the surface of the rotating ring is scraped off by the scraper. Meanwhile, magnetic plates are provided on both sides of the cleaning brush, facilitating the rinsing of the brush. When the magnetic plates move away from the magnetic ball, the magnetic ball is reset by the action of the return spring, sealing the water outlet of the water storage chamber. This achieves the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth dust blocking mechanism.

[0024] When the automatic sprinkler system sprays water, the liquid level inside the water storage chamber decreases. As the liquid level decreases, the float slides downwards along the slide bar, pulling the connecting rod. This causes the connecting rod to slide the baffle, opening the water inlet pipe and allowing water to automatically flow into the water storage chamber. Similarly, as the water level increases, the float moves upwards, causing the baffle to move towards the water inlet pipe, blocking it. This process is repeated, allowing the automatic sprinkler system to intermittently inject water when spraying the split labyrinth dust-blocking mechanism. This achieves automatic water control, reduces the labor intensity of workers, and is cost-effective. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional exploded magnification structure of the static disk of the present invention;

[0028] Figure 4 This is an exploded view of the static disk structure of the present invention.

[0029] Figure 5 This is an enlarged side cross-sectional view of the annular groove of the present invention.

[0030] Figure 6 This is an enlarged structural diagram of the water storage cavity in the closed state of the present invention;

[0031] Figure 7 This is a partially enlarged structural diagram of the cleaning mechanism of the present invention;

[0032] Figure 8 This is an enlarged structural diagram of the water inlet pipe in the blocked state of the present invention.

[0033] In the diagram: 1. Frame; 11. Shaft; 12. Bearing seat; 13. Support bearing; 2. Preliminary dust blocking mechanism; 21. Stationary disc; 22. Labyrinth moving disc; 23. Compressed packing brush; 24. Dust outlet; 3. Split labyrinth dust blocking mechanism; 31. Annular groove; 32. Rotating ring; 33. Insert ring; 34. Connecting ring; 35. Positioning pin; 36. Positioning hole; 4. Cleaning mechanism; 41. Dust discharge channel; 42. Cleaning brush; 43. Support spring 44. Spring; 45. Scraper; 46. Slide rail; 5. Automatic spraying mechanism; 51. Spraying assembly; 511. Water storage chamber; 512. First sealing ball; 513. Magnetic ball; 514. Second sealing ball; 515. Water outlet; 516. Guide rod; 517. Water inlet pipe; 518. Return spring; 52. Magnetic sheet; 6. Automatic water control mechanism; 61. Float; 62. Baffle; 63. Slide rod; 64. Connecting rod; 65. Slide rail. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0035] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example 1: As Figure 1 and Figure 2As shown, this application discloses a coal powder dust blocking mechanism for a scraper conveyor, comprising a frame 1. A rotating shaft 11 is mounted on the surface of the frame 1. Bearing seats 12 are fixed on both sides of the surface of the frame 1. Support bearings 13 are installed inside the bearing seats 12 and are fitted onto the surface of the rotating shaft 11. A preliminary dust blocking mechanism 2 is provided inside the support bearings 13. The preliminary dust blocking mechanism 2 includes a stationary disc 21, a labyrinth rotating disc 22, a compression packing brush 23, and a dust discharge port 24. Both sides of the frame 1 are embedded with a stationary disc 21, which is located inside the support bearing 13. The stationary disc 21 is sleeved on the surface of the rotating shaft 11. A labyrinth rotating disc 22 is provided on one side of the stationary disc 21 and is fixed to the surface of the rotating shaft 11. A compression packing brush 23 is sleeved on the surface of the rotating shaft 11 and is located on one side of the support bearing 13. Dust discharge ports 24 are provided on both sides of the frame 1, and the dust discharge ports 24 are located between the labyrinth rotating disc 22 and the bearing seat 12.

[0038] During use, the original height and width of the coal chute remain unchanged. After lengthening the rotating shaft 11, a preliminary dust blocking mechanism 2 is added to the inside of the frame 1. The bearing seat 12 is moved outward to completely isolate it from the material. The labyrinth rotating disk 22 is fixed to the surface of the rotating shaft 11 and rotates with the rotating shaft 11. Under normal circumstances, most of the dust and particulate matter is blocked by the labyrinth rotating disk 22. Once the ultrafine dust passes through the labyrinth rotating disk 22 and the stationary disk 21, some of the dust falls along the stationary disk 21 to the dust discharge port 24 and is discharged through the dust discharge port 24. At the same time, under the action of the compression packing brush 23, some of the ultrafine dust that falls to the side of the compression packing brush 23 can be brushed off, which makes it less likely that the lubrication cavity of the support bearing 13 will be damaged due to dust intrusion.

[0039] The technical solutions described in the above embodiments of this application have at least the following technical effects or advantages: reducing the risk of damage to the support bearing 13 due to dust intrusion into the lubrication cavity of the support bearing 13.

[0040] Example 2: Although the preliminary dust blocking mechanism 2 in the above examples blocks most of the dust and particulate matter, some ultrafine dust will enter through the gap between the labyrinth moving disk 22 and the stationary disk 21, affecting the dust blocking effect of the preliminary dust blocking mechanism 2; the present application example is based on the above examples with certain optimizations.

[0041] like Figure 3 , Figure 4 and Figure 5As shown, the surface of the preliminary dust-blocking mechanism 2 is provided with a split labyrinth-type dust-blocking mechanism 3. The split labyrinth-type dust-blocking mechanism 3 consists of an annular groove 31, a rotating ring 32, an insert ring 33, a connecting ring 34, a positioning pin 35, and a positioning hole 36. The annular groove 31 is opened on one side of the stationary plate 21, and the central axis of the annular groove 31 coincides with the central axis of the rotating shaft 11. The rotating ring 32 is provided inside the annular groove 31. The rotating ring 32 and the annular groove 31 rotate and cooperate with each other, but the rotating ring 32 and the annular groove 31 do not contact each other. Both the ring 32 and the annular groove 31 have trapezoidal cross-sections. The connecting ring 34 is fixed on the surface of the labyrinth moving disk 22. The connecting ring 34 has a conical structure. The central axis of the connecting ring 34 coincides with the central axis of the labyrinth moving disk 22. A plug ring 33 is fixed on one side of the connecting ring 34. The plug ring 33 and the rotating ring 32 are plugged into each other. The surface of the plug ring 33 is provided with a positioning hole 36 along the circumference. The inner wall of the rotating ring 32 is fixed with a positioning pin 35 along the circumference. The positioning pin 35 and the positioning hole 36 are plugged into each other.

[0042] In use, when the labyrinth moving plate 22 is assembled with the stationary plate 21, the labyrinth moving plate 22 can be pushed, causing the labyrinth moving plate 22 to drive the insert ring 33 to insert into the rotating ring 32, so that the positioning hole 36 fits onto the surface of the positioning pin 35. When the labyrinth moving plate 22 rotates, it drives the insert ring 33 to rotate synchronously, causing the rotating ring 32 to rotate inside the annular groove 31. When ultrafine dust enters the gap between the labyrinth moving plate 22 and the stationary plate 21, the action of the insert ring 33 and the rotating ring 32... The device can block most of the ultrafine dust. At the same time, since the connecting ring 34 has a conical structure, some of the ultrafine dust falls to the angle between the connecting ring 34 and the labyrinth rotating disk 22 under the action of gravity, and falls down with the rotation of the connecting ring 34. Since the cross-sections of the annular groove 31 and the rotating ring 32 are both trapezoidal, it further prevents ultrafine dust from entering the bottom of the annular groove 31, thereby reducing the amount of dust passing through the stationary disk 21, so as to realize the further blocking function of the dust blocking mechanism for ultrafine dust.

[0043] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: reducing dust passing through the stationary disc 21, and realizing the dust blocking mechanism's further blocking function for ultrafine dust.

[0044] Example 3: Although the split labyrinth dust blocking mechanism 3 in the above examples can further block ultrafine dust, some of the ultrafine dust that enters the annular groove 31 will accumulate inside it; the present application example is based on the above examples with certain optimizations.

[0045] like Figure 4 , Figure 5 and Figure 7As shown, the split labyrinth-type dust-blocking mechanism 3 has a cleaning mechanism 4 inside. The cleaning mechanism 4 includes a dust discharge channel 41, a cleaning brush 42, a support spring 43, a scraper 44, a slide groove 45, and a slide bar 46. The dust discharge channel 41 is located at the bottom of the stationary plate 21 and is connected to the bottom of the annular groove 31. The scraper 44 is rotatably connected to the inner wall of the dust discharge channel 41. The surface of the scraper 44 is in contact with the surface of the rotating ring 32. A support spring 43 is fixed between the scraper 44 and the dust discharge channel 41. A groove 45 is formed on the surface of the rotating ring 32. A slide bar 46 is slidably arranged inside the groove 45. When the slide bar 46 is fully inserted into the groove 45, the slide bar 46 and the groove 45 are engaged with each other by a locking block. A cleaning brush 42 is attached to the surface of the slide bar 46. The surface of the cleaning brush 42 is in contact with the inner wall of the annular groove 31. Magnetic sheets 52 are provided on both sides of the cleaning brush 42. When the cleaning brush 42 is located below the spray assembly 51, the magnetic sheets 52 are close to the spray assembly 51, controlling the spray assembly 51 to rinse the cleaning brush 42.

[0046] Before assembling the maze moving plate 22 and the stationary plate 21, the cleaning brush 42 can be placed to one side of the dust discharge channel 41. The slide bar 46 is inserted into the slide groove 45, and then the slide bar 46 is pushed to install the cleaning brush 42 on the surface of the rotating ring 32, so that the cleaning brush 42 contacts the inner wall of the annular groove 31. At the same time, the cleaning brush 42 is fixed by the locking action of the slide bar 46 and the slide groove 45. When in use, the rotating ring 32 rotates, causing the cleaning brush 42 to rotate synchronously, so that the cleaning brush 42 sweeps the ultrafine dust trapped in the annular groove 31, causing it to fall into the dust discharge channel 41 and fall along the dust discharge channel 41 to the dust discharge port 24 and be discharged. At the same time, when in use, the scraper 44 contacts the surface of the rotating ring 32 under the elastic force of the support spring 43, which can scrape off the dust attached to the surface of the rotating ring 32, so as to realize the cleaning function of the dust blocking mechanism for the trapped dust.

[0047] The technical solutions described in the above embodiments of this application have at least the following technical effects or advantages: they can clean the dust trapped inside the annular groove 31, thus preventing dust from accumulating inside the annular groove 31.

[0048] Example 4: This example is an optimization based on the above examples.

[0049] like Figure 4 and Figure 6As shown, the surface of the preliminary dust-blocking mechanism 2 is provided with an automatic spraying mechanism 5. The automatic spraying mechanism 5 contains a spraying component 51 and a magnetic sheet 52. The magnetic sheet 52 is circumferentially embedded on the surface of the rotating ring 32. The spraying component 51 is disposed inside the stationary plate 21, and the spraying component 51 is correspondingly arranged with the magnetic sheet 52. The interior of the spraying component 51 includes a water storage chamber 511, a first sealing ball 512, a magnetic ball 513, a second sealing ball 514, a water inlet 515, a guide rod 516, and an inlet. The water pipe 517 and the return spring 518 are included. The water storage cavity 511 is located inside the top of the stationary plate 21. The water storage cavity 511 has a gourd-shaped structure and an air hole for ventilation. The air pressure inside the water storage cavity 511 is automatically adjusted as the guide rod 516 moves up and down. The water storage cavity 511 has a water outlet 515 inside. The water inlet pipe 517 is fixed to the surface of the stationary plate 21 and is connected to the water storage cavity 511. The guide rod 516 is located inside the stationary plate 21. One end of the guide rod 516 penetrates the water storage cavity 511 and is fixed with a magnetic ball 513. The magnetic ball 513 is located inside the annular groove 31 and has the same pole as the magnetic sheet 52. A return spring 518 is fitted on the surface of the top of the guide rod 516. The two ends of the return spring 518 are fixedly connected to the guide rod 516 and the inner wall of the stationary plate 21, respectively. A first sealing ball 512 is fitted on the guide rod 516. Ball 512 is located inside the water storage cavity 511. The first sealing ball 512 is located below the water outlet 515. Under normal conditions, the first sealing ball 512 covers the water outlet of the water storage cavity 511. A second sealing ball 514 is provided above the first sealing ball 512. The second sealing ball 514 is fixed on the guide rod 516. The second sealing ball 514 is located below the water outlet 515. When the magnetic sheet 52 approaches the magnetic ball 513, the second sealing ball 514 blocks the water outlet 515.

[0050] In use, under normal conditions, the first sealing ball 512 seals the outlet of the water storage chamber 511 under its own weight and the elastic force of the return spring 518. When the rotating ring 32 rotates, it drives the magnetic plate 52 embedded on its surface to rotate synchronously. When the magnetic plate 52 rotates close to the magnetic ball 513, since the magnetic ball 513 and the magnetic plate 52 have the same pole, according to the principle of like poles repulsion, the magnetic plate 52 can push the magnetic ball 513 upward, making the first sealing ball 512 away from the outlet. At this time, the water inside the water storage chamber 511 sprays out, spraying the surfaces of the rotating ring 32 and the insert ring 33. It mixes with the dust in the air, increasing the gravity of the dust, making it less likely for the dust to fly into the annular groove 31, and making it easier for the dust to fall onto the surface of the insert ring 33 under the action of gravity, and continue to be carried away by the water flow, passing through the insert ring 33 and the dust discharge channel 4. 1. The water flow further slows down the speed at which ultrafine dust enters the annular groove 31. Since the rotating ring 32 is rotating while the annular groove 31 is stationary during use, the water sprayed onto the surface of the rotating ring 32 can rotate with the rotating ring 32 and be evenly distributed. Under the centrifugal force of the rotating ring 32, the water is thrown to the inner wall of the annular groove 31, causing the dust to fall when it comes into contact with water. The dust can also be brushed off into the dust discharge channel 41 by the cleaning brush 42. The dust attached to the surface of the rotating ring 32 is scraped off by the scraper 44. At the same time, since the two magnetic pieces 52 are located on both sides of the cleaning brush 42, it is convenient to rinse the cleaning brush 42. When the magnetic piece 52 moves away from the magnetic ball 513, the magnetic ball 513 is reset under the action of the reset spring 518, which blocks the outlet of the water storage cavity 511.

[0051] At the same time, when the first blocking ball 512 moves upward, it drives the second blocking ball 514 to move upward in sync, so that the second blocking ball 514 blocks the water outlet 515. When the scraper conveyor stops working, if the magnetic sheet 52 approaches the magnetic ball 513 and causes the water outlet of the water storage chamber 511 to open, the water flow can be prevented from spraying continuously under the action of the second blocking ball 514.

[0052] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: they realize the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth dust blocking mechanism 3, and further block ultrafine dust from entering the interior of the still plate 21.

[0053] Example 5: The water inlet of the automatic sprinkler mechanism 5 in the above examples needs to be filled with water intermittently. If it is operated manually, it is time-consuming and laborious. If a solenoid valve is used, it is not only costly, but also prone to damage in dusty environments. The present application example is an optimization based on the above examples.

[0054] like Figure 8As shown, the automatic sprinkler mechanism 5 is equipped with an automatic water control mechanism 6. The automatic water control mechanism 6 consists of a float 61, a baffle 62, a slide rod 63, a connecting rod 64, and a slide rail 65. The float 61 is sleeved on the surface of the guide rod 516 and is located above the water inlet 515. Slide rods 63 are inserted on both sides of the surface of the float 61. One end of the slide rod 63 is fixedly connected to the surface of the guide rod 516. The slide rail 65 is fixed to the inner wall of the water storage cavity 511. A baffle 62 for blocking the water inlet pipe 517 is slidably arranged on the surface of the slide rail 65. One end of the baffle 62 is rotatably connected to the connecting rod 64, and one end of the connecting rod 64 is rotatably connected to one side of the float 61.

[0055] In use, the float 61 floats on the horizontal surface inside the water storage cavity 511 under its own buoyancy. When the automatic spraying mechanism 5 sprays, the liquid volume inside the water storage cavity 511 decreases. At this time, the float 61 slides down along the slide rod 63 as the liquid volume decreases, pulling the connecting rod 64. The connecting rod 64 drives the baffle 62 to slide along the slide rail 65, so that the baffle 62 opens the water inlet pipe 517, allowing water to automatically flow into the water storage cavity 511 through the water inlet pipe 517. Similarly, at this time, the float 61 moves upward as the water volume increases, driving the baffle 62 to move towards the water inlet pipe 517. When the float 61 reaches a certain position, the baffle 62 blocks the water inlet pipe 517. Then, the above steps are repeated, so that the automatic spraying mechanism 5 automatically and intermittently introduces water when intermittently spraying the split labyrinth dust blocking mechanism 3, so as to realize the automatic water control function of the dust blocking mechanism.

[0056] The technical solutions described in the above embodiments of this application have at least the following technical effects or advantages: they achieve automatic water control, reduce the labor intensity of staff, and have low cost.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A coal powder dust blocking mechanism for a scraper conveyor, comprising a frame (1), characterized in that: A rotating shaft (11) is provided on the surface of the frame (1). Bearing seats (12) are fixed on both sides of the surface of the frame (1). A support bearing (13) is installed inside the bearing seat (12). The support bearing (13) is fitted on the surface of the rotating shaft (11). A preliminary dust blocking mechanism (2) is provided on the inner side of the support bearing (13). The preliminary dust blocking mechanism (2) includes a stationary disc (21), a labyrinth rotating disc (22), a compression packing brush (23), and a dust discharge port (24). A stationary disc (21) is embedded on both sides of the surface of the frame (1). The stationary disc (21) is located inside the support bearing (13). The stationary disc (21) is fitted on the surface of the rotating shaft (11). A labyrinth rotating disc (22) is provided on one side of the stationary disc (21). The labyrinth rotating disc (22) is fitted on the inner side of the support bearing (13). On the surface of the rotating shaft (11), a compression packing brush (23) is fitted on the surface of the rotating shaft (11). The compression packing brush (23) is located on one side of the supporting bearing (13). Dust discharge ports (24) are opened on both sides of the surface of the frame (1). The dust discharge ports (24) are located between the labyrinth moving plate (22) and the bearing seat (12). The surface of the preliminary dust blocking mechanism (2) is provided with a split labyrinth dust blocking mechanism (3). The split labyrinth dust blocking mechanism (3) is composed of an annular groove (31) and a connecting ring (34). The annular groove (31) is opened on one side of the stationary plate (21). The connecting ring (34) is fixed on the surface of the labyrinth moving plate (22). The split labyrinth dust blocking mechanism (3) also includes a cleaning mechanism (4). The cleaning mechanism (4) includes a dust discharge channel (41). Supporting spring (43) and scraper (44), dust discharge channel (41) is opened at the bottom of stationary plate (21), scraper (44) is rotatably connected to the inner wall of dust discharge channel (41), the surface of scraper (44) is in contact with the surface of rotating ring (32), and supporting spring (43) is fixed between scraper (44) and dust discharge channel (41). The preliminary dust blocking mechanism (2) also includes an automatic spraying mechanism (5), which includes a spraying assembly (51) and a magnetic sheet (52). The magnetic sheet (52) is embedded circumferentially on the surface of rotating ring (32). The spraying assembly (51) is set inside stationary plate (21), and the spraying assembly (51) and magnetic sheet (52) are correspondingly arranged. The spraying assembly (51) includes a water storage chamber (51). 1) A first sealing ball (512), a magnetic ball (513), a water inlet (515), a guide rod (516), a water inlet pipe (517), and a reset spring (518) are provided. The water storage cavity (511) is located inside the top of the stationary plate (21). The structure of the water storage cavity (511) is gourd-shaped. A water inlet (515) is provided inside the water storage cavity (511). The water inlet pipe (517) is fixed on the surface of the stationary plate (21) and is connected to the water storage cavity (511). The guide rod (516) is located inside the stationary plate (21). One end of the guide rod (516) passes through the water storage cavity (511) and is fixed with a magnetic ball (513). The magnetic ball (513) is located inside the annular groove (31).The magnetic ball (513) and the magnetic sheet (52) have the same pole. A return spring (518) is fitted on the surface of the top of the guide rod (516). The two ends of the return spring (518) are fixedly connected to the inner walls of the guide rod (516) and the stationary plate (21), respectively. A first sealing ball (512) is fitted on the guide rod (516).

2. The dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 1, characterized in that: The central axis of the annular groove (31) coincides with the central axis of the rotating shaft (11). The structure of the connecting ring (34) is a conical structure. The central axis of the connecting ring (34) coincides with the central axis of the labyrinth moving plate (22). The split labyrinth dust blocking mechanism (3) also includes a rotating ring (32). The rotating ring (32) is installed inside the annular groove (31). The rotating ring (32) and the annular groove (31) rotate and cooperate with each other. The cross sections of the rotating ring (32) and the annular groove (31) are both trapezoidal structures.

3. A dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 2, characterized in that: The split labyrinth dust-blocking mechanism (3) also includes a plug ring (33), a positioning pin (35) and a positioning hole (36). A plug ring (33) is fixed on one side of the connecting ring (34). The plug ring (33) and the rotating ring (32) are plugged into each other. A positioning hole (36) is opened on the surface of the plug ring (33) along the circumferential direction. A positioning pin (35) is fixed on the inner wall of the rotating ring (32) along the circumferential direction. The positioning pin (35) and the positioning hole (36) are plugged into each other.

4. A dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 1, characterized in that: The cleaning mechanism (4) also includes a cleaning brush (42), a groove (45) and a slide bar (46). The groove (45) is opened on the surface of the rotating ring (32). The slide bar (46) is slidably arranged inside the groove (45). When the slide bar (46) is fully inserted into the groove (45), the slide bar (46) and the groove (45) are engaged with each other by a locking block. The cleaning brush (42) is adhered to the surface of the slide bar (46). The surface of the cleaning brush (42) is in contact with the inner wall of the annular groove (31).

5. A dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 1, characterized in that: Under normal conditions, the first sealing ball (512) covers the outlet of the water storage cavity (511).

6. A dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 1, characterized in that: The spray assembly (51) also includes a second sealing ball (514), which is positioned above the first sealing ball (512). The second sealing ball (514) is fixed on the guide rod (516). When the magnetic sheet (52) approaches the magnetic ball (513), the second sealing ball (514) blocks the water outlet (515).

7. A dust-blocking mechanism for pulverized coal in a scraper conveyor according to claim 1, characterized in that: The automatic sprinkler mechanism (5) also includes an automatic water control mechanism (6). The automatic water control mechanism (6) consists of a float (61), a baffle (62), a slide rod (63), a connecting rod (64), and a slide rail (65). The float (61) is sleeved on the surface of the guide rod (516). Slide rods (63) are inserted on both sides of the surface of the float (61). One end of the slide rod (63) is fixedly connected to the surface of the guide rod (516). The slide rail (65) is fixed to the inner wall of the water storage cavity (511). A baffle (62) for blocking the water inlet pipe (517) is slidably provided on the surface of the slide rail (65). One end of the baffle (62) is rotatably connected to the connecting rod (64). One end of the connecting rod (64) is rotatably connected to one side of the float (61).

8. A dust-blocking method for a pulverized coal dust-blocking mechanism in a scraper conveyor, in conjunction with the pulverized coal dust-blocking mechanism for a scraper conveyor as described in claim 3, characterized in that the method... include: S1: A preliminary dust-blocking mechanism (2) is set inside the frame (1), the bearing seat (12) is moved outward to completely isolate it from the material, and the labyrinth disc (22) is fixed on the surface of the rotating shaft (11); S2: When the maze moving plate (22) is assembled with the stationary plate (21), push the maze moving plate (22) so that the maze moving plate (22) drives the connecting ring (34) to rotate along the annular groove (31); S3: Before assembling the maze moving plate (22) and the stationary plate (21), first insert the slide bar (46) into the slide groove (45), then push the slide bar (46) so that the cleaning brush (42) contacts the inner wall of the annular groove (31). At the same time, the cleaning brush (42) is fixed by the locking action of the slide bar (46) and the slide groove (45) at one end. S4: Under normal conditions, the first sealing ball (512) seals the outlet of the water storage chamber (511). When the rotating ring (32) rotates, it drives the magnetic sheet (52) embedded on its surface to rotate synchronously. When the magnetic sheet (52) rotates close to the magnetic ball (513), since the magnetic ball (513) and the magnetic sheet (52) are of the same pole, the magnetic sheet (52) pushes the magnetic ball (513) upward, causing the first sealing ball (512) to move away from the water outlet. At this time, water inside the water storage cavity (511) is sprayed out. When the magnetic sheet (52) moves away from the magnetic ball (513), the magnetic ball (513) is reset under the action of the reset spring (518) and blocks the outlet of the water storage cavity (511). At the same time, when the first blocking ball (512) moves upward, it drives the second blocking ball (514) to move upward synchronously, so that the second blocking ball (514) blocks the water outlet (515). S5: The float (61) floats on the horizontal surface inside the water storage cavity (511) under its own buoyancy. When the automatic spraying mechanism (5) sprays, the liquid volume inside the water storage cavity (511) decreases. At this time, the float (61) slides down along the slide bar (63) as the liquid volume decreases, pulling the connecting rod (64) and causing the connecting rod (64) to drive the baffle (62) to slide along the slide (65), so that the baffle (62) opens the water inlet pipe (517) and allows the water to automatically enter the water storage cavity (511) through the water inlet pipe (517). Similarly, at this time, the float (61) moves upward as the water volume increases, driving the baffle (62) to block the water inlet pipe (517).

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