Pulverized coal dust blocking mechanism for scraper conveyor and dust blocking method of pulverized coal dust blocking mechanism

Abstract

The invention discloses a pulverized coal dust blocking mechanism for a scraper conveyor and a dust blocking method of the pulverized coal dust blocking mechanism, and relates to the technical field of scraper conveyors, the pulverized coal dust blocking mechanism comprises a rack, a primary dust blocking mechanism is arranged on the inner side of a supporting bearing, and the interior of the primary dust blocking mechanism comprises a static disc, a labyrinth movable disc, a compression packing brush and a dust discharging opening; static discs are installed on the two sides of the surface of the rack in an embedded mode, a labyrinth movable disc is arranged on one side of each static disc, the surface of a rotating shaft is sleeved with a compression packing brush, dust discharging openings are formed in the two sides of the surface of the rack, and a split labyrinth type dust blocking mechanism is arranged on the surface of the preliminary dust blocking mechanism. According to the split labyrinth type dust blocking mechanism, the risk that the supporting bearing is damaged due to dust invasion in a lubricating cavity of the supporting bearing can be reduced, dust left in an annular groove can be brushed, the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth type dust blocking mechanism is achieved, automatic water control is achieved, the labor intensity of workers is reduced, and the working efficiency is improved. And the cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scraper machines, in particular to a coal dust blocking mechanism for a scraper machine and a dust blocking method thereof. BACKGROUND

[0002] At present, the trough box type scraper is widely used in domestic coal mines and non-coal mines for transporting bulk materials. However, the head and tail sprockets and the main shaft of the trough box type scraper conveyor collide irregularly with the (mixed coal) material, which inevitably causes small particles or powder materials to enter along the shaft surface through the gap, damage the soft rubber slide bracket grease seal ring, and then invade the bearing seat, causing the lubricating grease to mix with the coal dust, resulting in poor bearing lubrication, frequent bearing damage during long-term operation, affecting production and increasing maintenance workload. SUMMARY

[0003] The present application provides a coal dust blocking mechanism for a scraper machine, which solves the problem of bearing damage caused by the invasion of small particles or powder materials into the bearing seat in the prior art, reduces the risk of damage to the supporting bearing due to the invasion of dust into the lubricating cavity, can clean the dust accumulated in the ring type groove, avoids the accumulation of dust in the ring type groove, realizes the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth type dust blocking mechanism, realizes automatic water control, reduces the labor intensity of workers, and has low cost.

[0004] The present application provides a coal dust blocking mechanism for a scraper machine, which includes a rack, a rotating shaft arranged on the surface of the rack, a bearing seat fixed on both sides of the surface of the rack, a supporting bearing installed in the bearing seat, the supporting bearing being sleeved on the surface of the rotating shaft, a preliminary dust blocking mechanism arranged on the inner side of the supporting bearing, a static disc, a labyrinth dynamic disc, a compressed packing brush and a dust discharge port being included in the preliminary dust blocking mechanism, the static disc being embedded and installed on both sides of the surface of the rack, the static disc being located on the inner side of the supporting bearing, the static disc being sleeved on the surface of the rotating shaft, the labyrinth dynamic disc being arranged on one side of the static disc, the labyrinth dynamic disc being sleeved on the surface of the rotating shaft, the compressed packing brush being sleeved on the surface of the rotating shaft, the compressed packing brush being located on one side of the supporting bearing, the dust discharge port being arranged on both sides of the surface of the rack, the dust discharge port being located between the labyrinth dynamic disc and the bearing seat, a split labyrinth type dust blocking mechanism being arranged on the surface of the preliminary dust blocking mechanism, the split labyrinth type dust blocking mechanism being composed of a ring type groove and a connecting ring, the ring type groove being arranged on one side of the static disc, and the connecting ring being fixed on the surface of the labyrinth dynamic disc.

[0005] Preferably, the central axis of the ring-shaped groove coincides with the central axis of the rotating shaft, the structure of the connecting ring is a tapered structure, the central axis of the connecting ring coincides with the central axis of the labyrinth runner, the split labyrinth dust prevention mechanism further comprises a rotating ring, the inside of the ring-shaped groove is provided with the rotating ring, the rotating ring and the ring-shaped groove are rotationally matched with each other, and the cross sections of the rotating ring and the ring-shaped groove are all ladder-shaped structures.

[0006] Preferably, the split labyrinth dust prevention mechanism further comprises an insertion ring, a positioning clamping column and a positioning clamping hole, one side of the connecting ring is fixedly provided with the insertion ring, the insertion ring and the rotating ring are mutually inserted and matched, the surface of the insertion ring is provided with the positioning clamping hole in the circumferential direction, the inner wall of the rotating ring is fixedly provided with the positioning clamping column in the circumferential direction, and the positioning clamping column and the positioning clamping hole are mutually clamped and matched.

[0007] Preferably, the split labyrinth dust prevention mechanism further comprises a cleaning brush mechanism, the cleaning brush mechanism comprises a dust removal channel, a supporting spring and a scraper, the dust removal channel is arranged at the bottom of the static disc, the inner wall of the dust removal channel is rotationally connected with the scraper, the surface of the scraper is in contact with the surface of the rotating ring, and the supporting spring is fixed between the scraper and the dust removal channel.

[0008] Preferably, the cleaning brush mechanism further comprises a cleaning brush, a sliding groove and a sliding strip, the sliding groove is arranged on the surface of the rotating ring, the sliding strip is slidably arranged in the inside of the sliding groove, the sliding strip and the sliding groove are mutually clamped and matched through a clamping block when the sliding strip is completely inserted into the inside of the sliding groove, the surface of the sliding strip is attached with the cleaning brush, and the surface of the cleaning brush is in contact with the inner wall of the ring-shaped groove.

[0009] Preferably, the preliminary dust prevention mechanism further comprises an automatic spraying mechanism, the automatic spraying mechanism comprises a spraying assembly and a magnetic sheet, the magnetic sheet is embedded on the surface of the rotating ring in the circumferential direction, the spraying assembly is arranged in the inside of the static disc, and the spraying assembly is correspondingly arranged with the magnetic sheet.

[0010] Preferably, the spraying assembly comprises a water storage cavity, a first plugging ball, a magnetic ball, a water outlet, a guide rod, a water inlet pipe and a return spring, the water storage cavity is arranged in the inside of the top of the static disc, the structure of the water storage cavity is a gourd-shaped structure, the inside of the water storage cavity is provided with the water outlet, the water inlet pipe is fixed on the surface of the static disc, the water inlet pipe is in communication with the water storage cavity, the guide rod is arranged in the inside of the static disc, one end of the guide rod penetrates through the water storage cavity and is fixedly provided with the magnetic ball, the magnetic ball is located in the inside of the ring-shaped groove, the magnetic ball and the magnetic sheet are of the same polarity, the surface of the top of the guide rod is sleeved with the return spring, the two ends of the return spring are fixedly connected with the guide rod and the inner wall of the static disc respectively, the first plugging ball is sleeved on the guide rod, and the first plugging ball covers the water outlet of the water storage cavity in a normal state.

[0011] Preferably, the spraying assembly further comprises a second blocking ball, the first blocking ball is provided with the second blocking ball above, the second blocking ball is sleeved on the guide rod, when the magnetic sheet is close to the magnetic ball, the second blocking ball blocks the water outlet.

[0012] Preferably, the automatic spraying mechanism further comprises an automatic water control mechanism, the automatic water control mechanism is composed of a floating plate, a baffle, a sliding rod, a connecting rod and a slide, the floating plate is sleeved on the surface of the guide rod, the two sides of the surface of the floating plate are provided with the sliding rod, one end of the sliding rod is fixedly connected with the surface of the guide rod, the slide is fixed on the inner wall of the water storage cavity, the surface of the slide is slidably provided with the baffle for shielding the water inlet pipe, one end of the baffle is rotatably connected with the connecting rod, one end of the connecting rod is rotatably connected with one side of the floating plate.

[0013] A coal dust blocking method for a scraper, which is matched with a coal dust blocking mechanism for the scraper, the method comprises:

[0014] S1: a preliminary dust blocking mechanism is arranged on the inner side of the rack, the bearing seat is moved outward to be completely separated from the material, and the labyrinth dynamic disc is sleeved on the surface of the rotating shaft;

[0015] S2: when the labyrinth dynamic disc and the static disc are assembled, the labyrinth dynamic disc is pushed to rotate the connecting ring along the annular groove;

[0016] S3: before assembling the labyrinth dynamic disc and the static disc, the sliding strip is inserted into the sliding groove, then the sliding strip is pushed to make the cleaning brush contact with the inner wall of the annular groove, and the cleaning brush is fixed under the clamping action of the sliding strip and the sliding groove at one end;

[0017] S4: under normal conditions, the first blocking ball blocks the water outlet of the water storage cavity, when the rotating ring rotates to drive the magnetic sheet embedded on the surface thereof to rotate synchronously, when the magnetic sheet rotates to be close to the magnetic ball, the magnetic sheet pushes the magnetic ball upward due to the same polarity of the magnetic ball and the magnetic sheet, so that the first blocking ball moves away from the water outlet, at this time, the water in the water storage cavity is sprayed out, when the magnetic sheet moves away from the magnetic ball, the magnetic ball is reset under the action of the reset spring to block the water outlet of the water storage cavity, and when the first blocking ball moves upward, the second blocking ball moves upward synchronously, so that the second blocking ball blocks the water passage.

[0018] S5: the floating plate floats on the horizontal plane in the water storage cavity under the action of the buoyancy of the floating plate, after the automatic spraying mechanism sprays, the liquid amount in the water storage cavity decreases, at this time, the floating plate slides downward along the sliding rod as the liquid amount decreases, pulls the connecting rod, and drives the baffle to slide along the slide, so that the baffle opens the water inlet pipe, and the water flow automatically enters the water storage cavity through the water inlet pipe, and in the same way, at this time, the floating plate moves upward as the water amount increases, and drives the baffle to block the water inlet pipe.

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

[0020] By adopting the preliminary dust blocking mechanism, the split labyrinth dust blocking mechanism, the cleaning brush mechanism, the automatic spraying mechanism and the automatic water control mechanism, the preliminary dust blocking mechanism is added inside the rack after the shaft is lengthened, the bearing seat is moved out and completely separated from the material, the labyrinth moving disc is sleeved on the surface of the rotating shaft and rotates with the rotating shaft. Under normal circumstances, most of the dust and particulate matter are blocked by the labyrinth moving disc. Once the ultrafine dust passes through the labyrinth moving disc and the static disc, part of the dust falls to the dust exhaust port along the static disc and is exhausted through the dust exhaust port. At the same time, the compression packing brush can brush off the ultrafine dust falling to one side of the compression packing brush under the action of the compression packing brush.

[0021] When the labyrinth moving disc and the static disc are assembled, the labyrinth moving disc can be pushed to make the labyrinth moving disc drive the insert ring to insert into the inside of the rotating ring, make the positioning clamping hole sleeve to the surface of the positioning clamping column, make the labyrinth moving disc drive the insert ring to rotate synchronously when rotating, drive the rotating ring to rotate in the ring-shaped groove. When the ultrafine dust enters the gap between the labyrinth moving disc and the static disc, most of the ultrafine dust can be blocked under the action of the insert ring and the rotating ring. At the same time, due to the tapered structure of the connecting ring, part of the ultrafine dust falls to the angle between the connecting ring and the labyrinth moving disc under the action of gravity and falls with the connecting ring. Due to the fact that the cross section of the ring-shaped groove and the rotating ring is trapezoidal, the ultrafine dust is further blocked from entering the bottom of the ring-shaped groove.

[0022] Before assembling the labyrinth moving disc and the static disc, the slide bar can be inserted into the slide groove, and then the slide bar is pushed to install the cleaning brush on the surface of the rotating ring, so that the cleaning brush contacts the inner wall of the ring-shaped groove. At the same time, the cleaning brush is fixed under the clamping action of the slide bar and the slide groove at one end. When in use, the rotating ring drives the cleaning brush to rotate synchronously, so that the cleaning brush cleans the ultrafine dust remaining in the ring-shaped groove and makes it fall into the dust exhaust channel. At the same time, the scraper contacts the surface of the rotating ring under the elastic force of the supporting spring when in use, so that the dust adhering to the surface of the rotating ring is scraped off, avoiding the accumulation of dust in the ring-shaped groove.

[0023] The first blocking ball blocks the water outlet of the water storage cavity in a normal state. When the magnetic sheet rotates to be close to the magnetic force ball along with the rotating ring, the magnetic force ball is pushed upward by the magnetic sheet because the magnetic force ball and the magnetic sheet have the same polarity, so that the first blocking ball is away from the water outlet. At this time, the water in the water storage cavity is sprayed out to spray the surface of the rotating ring and the insert ring, mixes with the dust in the air, increases the gravity of the dust, and makes the dust not easy to fly into the ring-shaped groove and more easily fall to the surface of the insert ring under the action of gravity and be taken away by the water flow. At the same time, the speed of the superfine dust entering the ring-shaped groove can be further slowed down under the action of the water flow. Because the rotating ring is in a rotating state during use and the ring-shaped groove is in a static state, the water flow sprayed to the surface of the rotating ring can rotate along with the rotating ring, is uniformly distributed, and is thrown to the inner wall of the ring-shaped groove under the rotating centrifugal force of the rotating ring, so that the dust falls after meeting water, and the dust can be brushed to the dust removal channel by the cleaning brush. The dust attached to the surface of the rotating ring is scraped off by the scraper. At the same time, because the magnetic sheets are arranged on both sides of the cleaning brush, the cleaning brush is conveniently flushed. When the magnetic sheets move away from the magnetic force ball, the magnetic force ball is reset under the action of the reset spring to block the water outlet of the water storage cavity, so that the automatic spraying function of the dust blocking mechanism on the surface of the split labyrinth dust blocking mechanism is realized.

[0024] When the automatic spraying mechanism sprays, the liquid amount in the water storage cavity decreases, so that the floating plate slides downward along the slide rod as the liquid amount decreases, pulls the connecting rod, and drives the baffle to slide to open the water inlet pipe. The water flow automatically enters the water storage cavity through the water inlet pipe. Similarly, at this time, the floating plate moves upward as the water amount increases, drives the baffle to move to the side of the water inlet pipe to block the water inlet pipe, and then the above steps are repeated, so that the automatic spraying mechanism automatically and intermittently supplies water when intermittently spraying the split labyrinth dust blocking mechanism, realizes automatic water control, reduces the labor intensity of the staff, and has low cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional appearance structure schematic diagram of the present application;

[0026] Figure 2 It is a front view cross-sectional structure schematic diagram of the present application;

[0027] Figure 3 It is a static disc three-dimensional explosion amplification structure schematic diagram of the present application;

[0028] Figure 4 It is a static disc cross-sectional explosion amplification structure schematic diagram of the present application;

[0029] Figure 5 It is a ring-shaped groove side view cross-sectional amplification structure schematic diagram of the present application;

[0030] Figure 6 It is a water storage cavity closed state amplification structure schematic diagram of the present application;

[0031] Figure 7 It is partial enlarged structural schematic view of the brush cleaning mechanism of the application;

[0032] Figure 8 It is enlarged structural schematic view of the water inlet pipe blocking state of the application.

[0033] In the figure: 1, frame; 11, rotating shaft; 12, bearing seat; 13, supporting bearing; 2, preliminary dust blocking mechanism; 21, static disc; 22, labyrinth dynamic disc; 23, compressed packing brush; 24, dust discharge port; 3, split labyrinth dust blocking mechanism; 31, ring type groove; 32, rotating ring; 33, insertion ring; 34, connecting ring; 35, positioning clamping column; 36, positioning clamping hole; 4, brush cleaning mechanism; 41, dust discharge channel; 42, cleaning brush; 43, supporting spring; 44, scraper; 45, sliding groove; 46, sliding bar; 5, automatic spraying mechanism; 51, spraying assembly; 511, water storage cavity; 512, first blocking ball; 513, magnetic ball; 514, second blocking ball; 515, water inlet; 516, guide rod; 517, water inlet pipe; 518, return spring; 52, magnetic sheet; 6, automatic water control mechanism; 61, floating plate; 62, baffle; 63, sliding rod; 64, connecting rod; 65, sliding way. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the application are shown; however, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0035] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are only for the purpose of illustration and are not intended to be the only 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 application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example one: as Figure 1 and Figure 2As shown, the coal dust blocking mechanism for the scraper machine comprises a rack 1, the surface of the rack 1 is provided with a rotating shaft 11, both sides of the surface of the rack 1 are fixed with bearing seats 12, the inside of the bearing seat 12 is installed with a supporting bearing 13, the supporting bearing 13 is sleeved on the surface of the rotating shaft 11, the inside of the supporting bearing 13 is provided with a preliminary dust blocking mechanism 2, the inside of the preliminary dust blocking mechanism 2 comprises a static disc 21, a labyrinth dynamic disc 22, a compression packing brush 23 and a dust discharging port 24, both sides of the surface of the rack 1 are embeddedly installed with the static disc 21, the static disc 21 is located at the inside of the supporting bearing 13, the static disc 21 is sleeved on the surface of the rotating shaft 11, one side of the static disc 21 is provided with the labyrinth dynamic disc 22, the labyrinth dynamic disc 22 is sleeved on the surface of the rotating shaft 11, the rotating shaft 11 is sleeved with the compression packing brush 23, the compression packing brush 23 is located at one side of the supporting bearing 13, both sides of the surface of the rack 1 are provided with the dust discharging port 24, the dust discharging port 24 is located between the labyrinth dynamic disc 22 and the bearing seat 12,

[0038] In use, the original coal chute box height and width are kept unchanged, the rotating shaft 11 is lengthened, the preliminary dust blocking mechanism 2 is additionally arranged inside the rack 1, the bearing seat 12 is moved outward to be completely separated from the material, the labyrinth dynamic disc 22 is sleeved on the surface of the rotating shaft 11 and rotates with the rotating shaft 11, under normal circumstances, most of the dust and particulate matter are blocked by the labyrinth dynamic disc 22, once the ultrafine dust passes through the labyrinth dynamic disc 22 and the static disc 21, part of the dust falls along the static disc 21 to the dust discharging port 24 and is discharged through the dust discharging port 24, at the same time, part of the ultrafine dust falling to one side of the compression packing brush 23 is brushed off under the action of the compression packing brush 23, so that the lubricating cavity of the supporting bearing 13 is not easily invaded by the dust and the supporting bearing 13 is not damaged.

[0039] The technical scheme in the above embodiment of the application has at least the following technical effects or advantages: the risk of damage of the supporting bearing 13 due to invasion of dust into the lubricating cavity of the supporting bearing 13 is reduced.

[0040] Embodiment two: although the preliminary dust blocking mechanism 2 in the above embodiment blocks most of the dust and particulate matter, part of the ultrafine dust enters through the gap between the labyrinth dynamic disc 22 and the static disc 21, which affects the dust blocking effect of the preliminary dust blocking mechanism 2; the embodiment is optimized on the basis of the above embodiment.

[0041] As Figure 3 , Figure 4 and Figure 5As shown, the surface of the preliminary dust blocking mechanism 2 is provided with a split labyrinth dust blocking mechanism 3, which is composed of a ring-shaped groove 31, a rotating ring 32, an insertion ring 33, a connecting ring 34, a positioning clamping column 35 and a positioning clamping hole 36. The ring-shaped groove 31 is opened on one side of the static disc 21, and the central axis of the ring-shaped groove 31 coincides with the central axis of the rotating shaft 11. The rotating ring 32 is arranged inside the ring-shaped groove 31, and the rotating ring 32 is in rotating cooperation with the ring-shaped groove 31. The rotating ring 32 and the ring-shaped groove 31 are not in contact with each other. The cross sections of the rotating ring 32 and the ring-shaped groove 31 are both ladder-shaped structures. The connecting ring 34 is fixed on the surface of the labyrinth dynamic disc 22. The connecting ring 34 is in a conical structure, and the central axis of the connecting ring 34 coincides with the central axis of the labyrinth dynamic disc 22. One side of the connecting ring 34 is fixed with the insertion ring 33. The insertion ring 33 is in inter-insertion cooperation with the rotating ring 32. The surface of the insertion ring 33 is provided with the positioning clamping hole 36 in the circumferential direction. The inner wall of the rotating ring 32 is fixed with the positioning clamping column 35 in the circumferential direction. The positioning clamping column 35 and the positioning clamping hole 36 are in inter-clamping cooperation.

[0042] In use, when the labyrinth dynamic disc 22 is assembled with the static disc 21, the labyrinth dynamic disc 22 can be pushed to make the insertion ring 33 inserted into the rotating ring 32, so that the positioning clamping hole 36 is sleeved on the surface of the positioning clamping column 35, and the labyrinth dynamic disc 22 rotates synchronously with the insertion ring 33, so that the rotating ring 32 rotates in the ring-shaped groove 31. When the superfine dust enters the gap between the labyrinth dynamic disc 22 and the static disc 21, most of the superfine dust can be blocked under the action of the insertion ring 33 and the rotating ring 32. At the same time, due to the conical structure of the connecting ring 34, part of the superfine dust falls to the angle between the connecting ring 34 and the labyrinth dynamic disc 22 under the action of gravity and falls with the connecting ring 34. Due to the ladder-shaped cross sections of the ring-shaped groove 31 and the rotating ring 32, the superfine dust is further blocked from entering the bottom of the ring-shaped groove 31, so as to reduce the dust passing through the static disc 21, thereby realizing the further blocking function of the dust blocking mechanism to the superfine dust.

[0043] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: reducing the dust passing through the static disc 21, and realizing the further blocking function of the dust blocking mechanism to the superfine dust.

[0044] Embodiment three: Although the split labyrinth dust blocking mechanism 3 in the above embodiment can further block the superfine dust, part of the superfine dust entering the inside of the ring-shaped groove 31 will accumulate inside. The present embodiment is optimized on the basis of the above embodiment.

[0045] As Figure 4 , Figure 5 and Figure 7As shown, the inside of the split labyrinth dust blocking mechanism 3 is provided with a cleaning brush mechanism 4, and the inside of the cleaning brush mechanism 4 includes a dust removal channel 41, a cleaning brush 42, a supporting spring 43, a scraper 44, a sliding groove 45 and a sliding bar 46. The dust removal channel 41 is arranged at the bottom of the static disc 21 and is connected with the bottom of the ring-shaped groove 31. The scraper 44 is rotatably connected to the inner wall of the dust removal channel 41, and the surface of the scraper 44 is in contact with the surface of the rotating ring 32. The supporting spring 43 is fixed between the scraper 44 and the dust removal channel 41. The sliding groove 45 is arranged on the surface of the rotating ring 32, and the sliding bar 46 is slidably arranged in the sliding groove 45. When the sliding bar 46 is completely inserted into the sliding groove 45, the sliding bar 46 and the sliding groove 45 are clamped and matched with each other through a clamping block. The surface of the sliding bar 46 is adhered with the cleaning brush 42, and the surface of the cleaning brush 42 is in contact with the inner wall of the ring-shaped groove 31. The two sides of the cleaning brush 42 are provided with magnetic sheets 52, so that when the cleaning brush 42 is located below the spraying assembly 51, the magnetic sheets 52 are close to the spraying assembly 51, and the spraying assembly 51 is controlled to wash the cleaning brush 42.

[0046] In use, before assembling the labyrinth rotating disc 22 and the static disc 21, the cleaning brush 42 can be taken to one side of the dust removal channel 41, the sliding bar 46 is inserted into the sliding groove 45, and then the sliding bar 46 is pushed to install the cleaning brush 42 on the surface of the rotating ring 32, so that the cleaning brush 42 is in contact with the inner wall of the ring-shaped groove 31, and the cleaning brush 42 is fixed under the clamping action of the sliding bar 46 and the sliding groove 45 at one end. In use, when the rotating ring 32 rotates, the cleaning brush 42 rotates synchronously, so that the cleaning brush 42 cleans the ultrafine dust accumulated in the ring-shaped groove 31, and falls into the dust removal channel 41, and then falls into the dust removal port 24 along the dust removal channel 41 and is discharged. At the same time, in use, the scraper 44 is in contact with the surface of the rotating ring 32 under the elastic force of the supporting spring 43, so that the dust adhered to the surface of the rotating ring 32 is scraped off, so as to realize the cleaning function of the dust blocking mechanism on the accumulated dust.

[0047] The technical solutions in the above embodiments of the application have at least the following technical effects or advantages: the dust accumulated in the ring-shaped groove 31 can be cleaned, and the dust accumulation in the ring-shaped groove 31 is avoided.

[0048] Embodiment four: the embodiment of the application is optimized on the basis of the above embodiments.

[0049] As Figure 4 and Figure 6As shown, the surface of the preliminary dust blocking mechanism 2 is provided with an automatic spraying mechanism 5, the inside of the automatic spraying mechanism 5 contains a spraying assembly 51 and a magnetic sheet 52, the magnetic sheet 52 is embedded on the surface of the rotating ring 32 in the circumferential direction, the spraying assembly 51 is arranged inside the static disc 21, the spraying assembly 51 is arranged corresponding to the magnetic sheet 52, the inside of the spraying assembly 51 contains a water storage cavity 511, a first blocking ball 512, a magnetic ball 513, a second blocking ball 514, a water passage 515, a guide rod 516, a water inlet pipe 517 and a reset spring 518, the water storage cavity 511 is opened inside the static disc 21 at the top position, the structure of the water storage cavity 511 is a gourd-shaped structure, the inside of the water storage cavity 511 is provided with an air hole for ventilation with the outside, so that the air pressure inside the water storage cavity 511 is automatically adjusted with the up and down movement of the guide rod 516, the inside of the water storage cavity 511 is provided with the water passage 515, the water inlet pipe 517 is fixed on the surface of the static disc 21, the water inlet pipe 517 is communicated with the water storage cavity 511, the guide rod 516 is arranged inside the static disc 21, one end of the guide rod 516 penetrates through the water storage cavity 511 and is fixed with the magnetic ball 513, the magnetic ball 513 is located inside the annular groove 31, the magnetic ball 513 and the magnetic sheet 52 are of the same polarity, the surface of the top position of the guide rod 516 is sleeved with the reset spring 518, both ends of the reset spring 518 are fixedly connected with the inner wall of the static disc 21 and the guide rod 516, the first blocking ball 512 is sleeved on the guide rod 516, the first blocking ball 512 is located inside the water storage cavity 511, the first blocking ball 512 is located below the water passage 515, the first blocking ball 512 covers the water outlet of the water storage cavity 511 in the normal state, the second blocking ball 514 is arranged above the first blocking ball 512, the second blocking ball 514 is sleeved on the guide rod 516, the second blocking ball 514 is located below the water passage 515, when the magnetic sheet 52 approaches the magnetic ball 513, the second blocking ball 514 blocks the water passage 515.

[0050] In use, in the normal state, the first blocking ball 512 blocks the water outlet of the water storage cavity 511 under the action of its own gravity and the elastic force of the reset spring 518. When the rotating ring 32 rotates, the magnetic sheet 52 embedded on the surface thereof rotates synchronously. When the magnetic sheet 52 rotates to be close to the magnetic force ball 513, the magnetic sheet 52 pushes the magnetic force ball 513 upward because the magnetic force ball 513 and the magnetic sheet 52 are of the same polarity, according to the principle that the same poles of magnets repel each other, so that the first blocking ball 512 moves away from the water outlet. At this time, the water in the water storage cavity 511 is sprayed out to spray the surface of the rotating ring 32 and the insertion ring 33, mixes with the dust in the air, increases the gravity of the dust, and makes the dust not easy to fly into the ring-shaped groove 31 and more easy to fall to the surface of the insertion ring 33 under the action of gravity and be carried away by the water flow. The water flow sprayed on the surface of the rotating ring 32 can rotate with the rotating ring 32 because the rotating ring 32 is in a rotating state in use and the ring-shaped groove 31 is in a static state, is uniformly distributed, and is thrown to the inner wall of the ring-shaped groove 31 under the action of the rotating centrifugal force of the rotating ring 32, so that the dust falls under water and can be brushed to 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, the two magnetic sheets 52 are located on the two sides of the cleaning brush 42, which facilitates flushing of the cleaning brush 42. When the magnetic sheet 52 moves away from the magnetic force ball 513, the magnetic force ball 513 is reset under the action of the reset spring 518 to block the water outlet of the water storage cavity 511.

[0051] At the same time, when the first blocking ball 512 moves upward, the second blocking ball 514 moves upward synchronously, so that the second blocking ball 514 blocks the water passage 515. When the scraper stops working, if the magnetic sheet 52 is close to the magnetic force ball 513 to make the water outlet of the water storage cavity 511 open, the water flow can be prevented from being sprayed all the time under the action of the second blocking ball 514.

[0052] The technical solutions in the embodiments of the application have at least the following technical effects or advantages: the dust blocking mechanism realizes the automatic spraying function on the surface of the split labyrinth dust blocking mechanism 3, and further blocks the superfine dust from entering the static disc 21.

[0053] Embodiment five: The water inlet of the automatic spraying mechanism 5 in the above-mentioned embodiments needs to be intermittently supplied with water. If the manual operation is time-consuming and laborious, if an electromagnetic valve is used, not only the cost is high, but also the electromagnetic valve is easy to be damaged in the dust environment. The embodiment of the application is optimized on the basis of the above-mentioned embodiments.

[0054] As Figure 8As shown, the inside of the automatic spraying mechanism 5 is provided with an automatic water control mechanism 6, which is composed of a floating plate 61, a baffle 62, a sliding rod 63, a connecting rod 64 and a sliding channel 65. The floating plate 61 is sleeved on the surface of the guide rod 516 and is located above the water inlet 515. The sliding rod 63 is inserted on both sides of the surface of the floating plate 61, one end of the sliding rod 63 is fixedly connected with the surface of the guide rod 516, the sliding channel 65 is fixed on the inner wall of the water storage cavity 511, the surface of the sliding channel 65 is slidably provided with the baffle 62 for shielding the water inlet pipe 517, one end of the baffle 62 is rotatably connected with the connecting rod 64, and one end of the connecting rod 64 is rotatably connected with one side of the floating plate 61.

[0055] In use, the floating plate 61 floats on the horizontal plane inside the water storage cavity 511 under the action of its own buoyancy. After the automatic spraying mechanism 5 sprays, the liquid volume inside the water storage cavity 511 decreases. At this time, the floating plate 61 slides downward along the sliding rod 63 as the liquid volume decreases, pulls the connecting rod 64, and makes the connecting rod 64 drive the baffle 62 to slide along the sliding channel 65, so that the baffle 62 opens the water inlet pipe 517, and the water flow automatically enters the water storage cavity 511 through the water inlet pipe 517. Similarly, at this time, the floating plate 61 moves upward as the water volume increases, drives the baffle 62 to move to the side of the water inlet pipe 517, and when the floating plate 61 reaches a certain position, the baffle 62 blocks the water inlet pipe 517. Then repeat the above steps to automatically and intermittently water the automatic spraying mechanism 5 when intermittently spraying the split labyrinth dust prevention mechanism 3, so as to realize the automatic water control function of the dust prevention mechanism.

[0056] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: automatic water control is realized, the labor intensity of workers is reduced, and the cost is relatively low.

[0057] The above description is only the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coal dust prevention mechanism for a scraper machine comprising a frame (1), characterized in that: The surface of the frame (1) is provided with a rotating shaft (11), both sides of the surface of the frame (1) are fixedly provided with a bearing seat (12), the inside of the bearing seat (12) is installed with a supporting bearing (13), the supporting bearing (13) is sleeved on the surface of the rotating shaft (11), the inside of the supporting bearing (13) is provided with a preliminary dust prevention mechanism (2), the inside of the preliminary dust prevention mechanism (2) comprises a static disc (21), a labyrinth dynamic disc (22), a compressed packing brush (23) and a dust discharge port (24), both sides of the surface of the frame (1) are embeddedly installed with the static disc (21), the static disc (21) is located at the inside of the supporting bearing (13), the static disc (21) is sleeved on the surface of the rotating shaft (11), one side of the static disc (21) is provided with the labyrinth dynamic disc (22), the labyrinth dynamic disc (22) is sleeved on the surface of the rotating shaft (11), the surface of the rotating shaft (11) is sleeved with the compressed packing brush (23), the compressed packing brush (23) is located at one side of the supporting bearing (13), both sides of the surface of the frame (1) are provided with the dust discharge port (24), the dust discharge port (24) is located between the labyrinth dynamic disc (22) and the bearing seat (12), the surface of the preliminary dust prevention mechanism (2) is provided with a split labyrinth dust prevention mechanism (3), the split labyrinth dust prevention mechanism (3) is composed of a ring groove (31) and a connecting ring (34), the ring groove (31) is formed on one side of the static disc (21), and the connecting ring (34) is fixed on the surface of the labyrinth dynamic disc (22).

2. A coal dust prevention mechanism for a scraper according to claim 1, characterized in that: The central axis of the ring groove (31) coincides with the central axis of the rotating shaft (11), the connecting ring (34) is in a tapered structure, the central axis of the connecting ring (34) coincides with the central axis of the labyrinth dynamic disc (22), the split labyrinth dust prevention mechanism (3) further comprises a rotating ring (32), the inside of the ring groove (31) is provided with the rotating ring (32), the rotating ring (32) and the ring groove (31) are rotatably connected with each other, and the cross sections of the rotating ring (32) and the ring groove (31) are all in a ladder-shaped structure.

3. A coal dust suppression mechanism for a scraper according to claim 2, characterized in that: The split labyrinth dust prevention mechanism (3) further comprises an insertion ring (33), a positioning clamping column (35) and a positioning clamping hole (36), one side of the connecting ring (34) is fixedly provided with the insertion ring (33), the insertion ring (33) and the rotating ring (32) are telescopically connected with each other, the surface of the insertion ring (33) is provided with the positioning clamping hole (36) in a circumferential direction, and the inner wall of the rotating ring (32) is fixedly provided with the positioning clamping column (35) in a circumferential direction.

4. The coal dust prevention mechanism for the scraper machine according to claim 1, characterized in that: The split labyrinth dust blocking mechanism (3) further comprises a cleaning brush mechanism (4), the cleaning brush mechanism (4) comprises a dust discharging channel (41), a supporting spring (43) and a scraper (44), the dust discharging channel (41) is arranged at the bottom of the static disc (21), the inner wall of the dust discharging channel (41) is rotationally connected with the scraper (44), the surface of the scraper (44) is in contact with the surface of the rotating ring (32), and the supporting spring (43) is fixed between the scraper (44) and the dust discharging channel (41).

5. A coal dust suppression mechanism for a scraper according to claim 4, wherein: The cleaning brush mechanism (4) further comprises a cleaning brush (42), a sliding groove (45) and a sliding strip (46), the sliding groove (45) is arranged on the surface of the rotating ring (32), the sliding strip (46) is slidably arranged in the sliding groove (45), when the sliding strip (46) is completely inserted into the sliding groove (45), the sliding strip (46) and the sliding groove (45) are clamped and matched with each other through a clamping block, the surface of the sliding strip (46) is attached with the cleaning brush (42), and the surface of the cleaning brush (42) is in contact with the inner wall of the annular groove (31).

6. A coal dust suppression mechanism for a drag scraper as set forth in claim 1, wherein: The preliminary dust blocking mechanism (2) further comprises an automatic spraying mechanism (5), the automatic spraying mechanism (5) comprises a spraying assembly (51) and a magnetic sheet (52), the magnetic sheet (52) is embedded on the surface of the rotating ring (32) in a circumferential direction, and the spraying assembly (51) is arranged in the static disc (21).

7. A coal dust suppression mechanism for a drag scraper as set forth in claim 6, wherein: The spraying assembly (51) comprises a water storage cavity (511), a first blocking ball (512), a magnetic ball (513), a water passing opening (515), a guide rod (516), a water inlet pipe (517) and a reset spring (518), the water storage cavity (511) is arranged in the inside of the static disc (21) at the top position, the structure of the water storage cavity (511) is a gourd-shaped structure, the water passing opening (515) is arranged in the inside of the water storage cavity (511), the water inlet pipe (517) is fixed on the surface of the static disc (21), the water inlet pipe (517) is in communication with the water storage cavity (511), the guide rod (516) is arranged in the inside of the static disc (21), one end of the guide rod (516) penetrates through the water storage cavity (511) and is fixed with the magnetic ball (513), the magnetic ball (513) is located in the inside of the annular groove (31), the magnetic ball (513) and the magnetic sheet (52) are of the same polarity, the surface of the top position of the guide rod (516) is sleeved with the reset spring (518), the two ends of the reset spring (518) are fixedly connected with the guide rod (516) and the inner wall of the static disc (21) respectively, and the first blocking ball (512) is sleeved on the guide rod (516) in a sleeved mode, and the first blocking ball (512) covers the water outlet of the water storage cavity (511) in a normal state.

8. A coal dust suppression mechanism for a drag scraper as set forth in claim 7, wherein: The spray assembly (51) further comprises a second blocking ball (514), the first blocking ball (512) is provided with the second blocking ball (514), the second blocking ball (514) is sleeved on the guide rod (516), when the magnetic sheet (52) is close to the magnetic ball (513), the second blocking ball (514) blocks the water outlet (515).

9. The coal dust suppression mechanism for a drag scraper of claim 6, wherein: The automatic spray mechanism (5) further comprises an automatic water control mechanism (6), the automatic water control mechanism (6) is composed of a floating plate (61), a baffle (62), a sliding rod (63), a connecting rod (64) and a slide (65), the floating plate (61) is sleeved on the surface of the guide rod (516), the two sides of the surface of the floating plate (61) are provided with the sliding rod (63), one end of the sliding rod (63) is fixedly connected with the surface of the guide rod (516), the slide (65) is fixed on the inner wall of the water storage cavity (511), the surface of the slide (65) is slidably provided with the baffle (62) for shielding the water inlet pipe (517), one end of the baffle (62) is rotatably connected with the connecting rod (64), one end of the connecting rod (64) is rotatably connected with one side of the floating plate (61).

10. A dust blocking method for a coal dust blocking mechanism of a scraper machine, which is matched with the coal dust blocking mechanism for a scraper machine according to claim 6, characterized in that, The method comprises: S1: a preliminary dust prevention mechanism (2) is arranged on the inner side of the rack (1), the bearing seat (12) is moved outward to be completely separated from the material, and the labyrinth dynamic disc (22) is sleeved on the surface of the rotating shaft (11); S2: when the labyrinth dynamic disc (22) is assembled with the static disc (21), the labyrinth dynamic disc (22) is pushed to drive the connecting ring (34) to rotate along the annular groove (31); S3: before assembling the labyrinth dynamic disc (22) and the static disc (21), the sliding bar (46) is inserted into the sliding groove (45), then the sliding bar (46) is pushed to make the cleaning brush (42) contact the inner wall of the annular groove (31), and the cleaning brush (42) is fixed under the clamping action of one end of the sliding bar (46) and the sliding groove (45); S4: in the normal state, the first blocking ball (512) blocks the water outlet of the water storage cavity (511), when the rotating ring (32) rotates, the magnetic sheet (52) embedded on the surface of the rotating ring (32) rotates synchronously, when the magnetic sheet (52) rotates to be close to the magnetic ball (513), because the magnetic sheet (52) and the magnetic ball (513) are of the same polarity, the magnetic sheet (52) pushes the magnetic ball (513) upward, so that the first blocking ball (512) is away from the water outlet, at this time, the water in 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) to block the water outlet of the water storage cavity (511), and when the first blocking ball (512) moves upward, the second blocking ball (514) moves upward synchronously, so that the second blocking ball (514) blocks the water outlet (515). S5: The floating plate (61) floats on the horizontal plane inside the water storage cavity (511) under its own buoyancy. After the automatic spraying mechanism (5) sprays, the liquid volume inside the water storage cavity (511) decreases. At this time, the floating plate (61) slides downward along the slide rod (63) as the liquid volume decreases, pulls the connecting rod (64), and makes the connecting rod (64) drive the baffle (62) to slide along the slide (65), so that the baffle (62) opens the water inlet pipe (517), and the water automatically flows into the water storage cavity (511) through the water inlet pipe (517). Similarly, at this time, the floating plate (61) moves upward as the water volume increases, driving the baffle (62) to block the water inlet pipe (517).

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