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CN-121993246-A - Protection device for coal seam extraction

CN121993246ACN 121993246 ACN121993246 ACN 121993246ACN-121993246-A

Abstract

The invention relates to the technical field of coal mine construction and discloses a coal seam extraction protection device, an L-shaped pipe, a filtering piece and a plurality of stirring rods, wherein the filtering piece is arranged on the inner side of a bending part of the L-shaped pipe and comprises a gear ring which is rotatably connected in the L-shaped pipe, a filter screen which is fixedly connected in the inner ring of the gear ring and used for intercepting solid particles, and the stirring rods are fixedly connected on the outer ring surface of the gear ring at equal intervals and face to the fluid inflow direction. Through the setting of L shape pipe and scraper blade, when fluid input, effectively reduce the fluid velocity of flow, provide the direction flow of fluid simultaneously, give its better settlement environment, the gas density is low come-up, simultaneously when the filter screen rotates, low-order scraper blade produces the effect of striking off to the filter screen, high-order scraper blade produces effective deformation to the filter screen, make the downthehole attached particle of it can further drop, and the granule that drops to coarse grain footpath region all the time, in effective separation, reduce the coarse coal to the degree of wear of follow-up transport pump body.

Inventors

  • CHE LU
  • SUN YULONG
  • ZHAN NAN
  • LIU KAI
  • SONG HE
  • Tao Renbin

Assignees

  • 淮北矿业股份有限公司

Dates

Publication Date
20260508
Application Date
20251226

Claims (9)

  1. 1. The utility model provides a coal seam is taken out and is adopted protection device which characterized in that includes: An L-shaped pipe (100); The filtering piece is arranged at the inner side of the bending part of the L-shaped pipe (100), and comprises a gear ring (110) which is rotatably connected in the L-shaped pipe (100), a filter screen (111) which is fixedly connected in the gear ring (110) and used for intercepting solid particles, and a plurality of stirring rods (112) which are fixedly connected on the outer ring surface of the gear ring (110) at equal intervals and face to the flowing direction of fluid; the scraping part is oppositely arranged on the inner wall of the L-shaped pipeline (100) and is adjacent to the outer side surface of the filter screen (111), the scraping part comprises a first folding rod and a second folding rod (120) which are fixedly connected to the inner wall of the L-shaped pipeline (100), the ends of the first folding rod and the second folding rod (120) are respectively fixedly connected with a first scraping plate and a second scraping plate (121), the installation height of the first folding rod (120) positioned at the upstream is lower than the installation height of the second folding rod (120) positioned at the downstream along the fluid flow direction, the first scraping plate and the second scraping plate (121) are configured to be always contacted with the outer side surface of the filter screen (111) in the working state, and the depth of the second scraping plate (121) stretching into the filter screen (111) is larger than the depth of the first scraping plate (121), and the contact surface of the second scraping plate (121) and the filter screen (111) is a curved surface; The flushing part is arranged on the L-shaped pipe (100), the flushing part comprises a diaphragm pump (130) fixedly connected to the surface of the L-shaped pipe (100), a water delivery pipe (131) fixedly connected with the output end of the diaphragm pump (130), and a plurality of spray heads (132) fixedly connected to the water delivery pipe (131) at equal intervals, and the spray directions of the spray heads (132) are inclined relative to the horizontal surface and the rotation direction of the gear ring (110) relative to the vertical plane.
  2. 2. A coal seam mining protection device as claimed in claim 1, wherein the screen (111) is woven from flexible wire and has mesh openings configured for classifying the coal particles.
  3. 3. A coal seam mining protection device as claimed in claim 1, wherein the filter screen (111) is made of polyurethane material, and a plurality of horn-shaped holes are formed in the surface of the filter screen, and the smaller end of the filter screen faces to the fluid flow direction.
  4. 4. A coal seam mining protection device as claimed in claim 2 or 3, wherein the stirring rod (112) is cylindrical and is kept in non-contact with the inner wall of the L-shaped pipe (100) in the working state.
  5. 5. A coal seam mining protection device as claimed in claim 2 or claim 3, wherein the whipstock (112) is triangular in cross section and has an inclined scooping surface for scooping up fluid from the L-shaped pipe (100) during rotation.
  6. 6. The protection device for coal seam mining according to claim 4, further comprising a driving member disposed on the L-shaped pipe (100), wherein the driving member comprises a driving motor (140) fixedly connected to the L-shaped pipe (100), and a pinion is fixedly connected to an output end of the driving motor (140).
  7. 7. The protection device for coal seam mining according to claim 5, further comprising a driving member disposed on the L-shaped pipe (100), wherein the driving member comprises a driving motor (140) fixedly connected to the L-shaped pipe (100), and a pinion is fixedly connected to an output end of the driving motor (140).
  8. 8. A coal seam mining protection device as claimed in claim 6 or claim 7, wherein the surfaces of the small teeth engage with external teeth of the ring gear (110).
  9. 9. The coal seam mining protection device as set forth in claim 8, wherein a branch pipe is fixedly connected to the bent portion of the L-shaped pipe (100), and the branch pipe is used for discharging solid particles separated from the L-shaped pipe (100).

Description

Protection device for coal seam extraction Technical Field The invention relates to the technical field of coal mine construction, in particular to a protection device for coal seam extraction. Background When drilling engineering construction such as gas extraction, water exploration and drainage is carried out under a coal mine, the produced drilling flowback is usually coal slurry with mixed gas, liquid and solid phases, and a large amount of coal dust is contained therein. After gas extraction is completed, the coal slurry is collected and treated in a pipeline system, and finally, the recycling of coal resources is realized. However, in the extraction process, if the above flowback coal slime slurry is directly discharged into an underground drainage system or a gas extraction pipeline, a series of problems such as pipeline blockage, water pump abrasion, sedimentation tank sedimentation and the like are extremely easy to be caused, the mine safety production and the operation efficiency are seriously threatened, especially in a pipeline conveying section, solid particles in the coal slime are easy to be attached and accumulated at a filtering device (such as a screen mesh) to form physical blockage, so that fine coal cannot be effectively separated and discharged, and even a partial pipeline section is completely blocked when serious, and in addition, the blockage risk of the screen mesh is further aggravated due to the wide particle size distribution range of coal particles in the flowback material. At present, aiming at the problem of screen blockage, cleaning is carried out in a manual mode, particularly in the working conditions that the pipe diameter is large, the flow speed is low, and the liquid level is usually maintained below one half of the pipe diameter, coal particles are easier to deposit, and cleaning is particularly difficult. Disclosure of Invention The invention aims to provide a protection device for coal seam drainage, which is used for solving the problems of the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the protection device for coal seam drainage comprises: An L-shaped pipe; the filtering piece is arranged at the inner side of the bending part of the L-shaped pipe and comprises a gear ring which is rotationally connected in the L-shaped pipe, a filter screen which is fixedly connected with the inner ring of the gear ring and used for intercepting solid particles, and a plurality of stirring rods which are fixedly connected with the outer ring surface of the gear ring at equal intervals and face to the flowing direction of fluid; The scraping piece is oppositely arranged on the inner wall of the L-shaped pipeline and is adjacent to the outer side surface of the filter screen, the scraping piece comprises a first folding rod and a second folding rod which are fixedly connected to the inner wall of the L-shaped pipeline, the end parts of the first folding rod and the second folding rod are respectively fixedly connected with a first scraping plate and a second scraping plate, the installation height of the first folding rod positioned at the upstream is lower than the installation height of the second folding rod positioned at the downstream along the fluid flow direction, the first scraping plate and the second scraping plate are configured to be always contacted with the outer side surface of the filter screen in the working state, the depth of the second scraping plate stretching into the filter screen is larger than the depth of the first scraping plate stretching into the filter screen along the radial direction of the filter screen, and the contact surface of the second scraping plate and the filter screen is a curved surface; the flushing part is arranged on the L-shaped pipe and comprises a diaphragm pump fixedly connected to the surface of the L-shaped pipe, a water pipe fixedly connected with the output end of the diaphragm pump, and a plurality of spray heads fixedly connected to the water pipe at equal intervals, wherein the spray directions of the spray heads are inclined relative to the horizontal direction facing the fluid flow direction and inclined relative to the vertical plane direction facing the rotating direction of the gear ring. The screen is woven from flexible wires with mesh openings configured for classified screening of coal particles. The filter screen is made of polyurethane materials, a plurality of horn-shaped holes are formed in the surface of the filter screen, and one end with smaller pore diameter faces to the flowing direction of fluid. The stirring rod is cylindrical and keeps non-contact with the inner wall of the L-shaped pipe in a working state. The cross section of the stirring rod is triangular, and the stirring rod is provided with an inclined scooping surface for scooping up the fluid in the L-shaped pipe during rotation. Still include the driving piece, set up on t