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Coal Mine High Pressure Filling Pipeline Current Limiting Device

A technology for filling pipelines and flow restricting devices, applied in the directions of fillings, safety devices, pipe components, etc., can solve the problems of reduced resistance of filling slurry, damage to risers, hidden safety hazards, etc., to reduce wear, save costs, and improve safety. Guaranteed effect

Active Publication Date: 2016-01-27
SHANDONG KANGER ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the coal mine filling process, as the filling project progresses, the length of the main filling line pipeline will gradually become shorter, resulting in a decrease in the resistance of the filling slurry in the pipeline, and an increase in the flow rate of the filling slurry in the pipeline. Filling pump pumping, one pumping stroke reaches 0.23m 3 , the slurry is split into the standpipe, if the flow rate of the slurry in the standpipe is too fast, there will be no slurry in the standpipe and a vacuum will be formed, and when the split slurry slides into the standpipe, the drop will be too large, causing a strong impact on the bottom of the standpipe , affecting pipeline life and normal production
In addition, the sub-strand slurry falling in the standpipe will evacuate the standpipe, causing the pipeline to vibrate severely, causing the standpipe to be often damaged, and accompanied by a large safety hazard
The traditional solution to this problem is to install a valve to limit the flow rate on the horizontal pipe under the standpipe, but the valve is often damaged due to the wear of the filling slurry in a short period of time, and needs to be replaced frequently, resulting in large waste
In addition, due to the sudden change of the pipe diameter of the valve, the pipeline will also vibrate severely. At the same time, the shear force of the valve will cause the gray-water separation of the filling slurry, and the flow performance of the dehydrated sand will change, which will cause blockage at the valve, forming A Common Security Hazard

Method used

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  • Coal Mine High Pressure Filling Pipeline Current Limiting Device
  • Coal Mine High Pressure Filling Pipeline Current Limiting Device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After the length of the filling main line is shortened to 400m, it is detected that the flow velocity of the filling slurry reaches 1.5m / s; a flow limiter 1 is added on the horizontal pipe between the standpipe 5 and the valve 2, the total length is 1980mm, and the surfacing welding resistance The thickness of the abrasive layer is 4mm, the inner diameter of the restrictor 6 is gradually reduced from 179mm to 95mm, and the inner diameter of the opening 9 is 179mm. The filling slurry initially sets after 240 minutes after entering the filling area. The height of the filling slurry 8 in the standpipe 5 remained constant after 180m, and the pipeline was transported stably within 30 days, without shut-off vibration and pipeline blockage.

Embodiment 2

[0019] After the length of the filling main line is shortened to 350m, it is detected that the flow velocity of the filling slurry reaches 1.6m / s; a flow restrictor 1 is added on the horizontal pipe between the standpipe 5 and the valve 2, the total length is 2200mm, and the flow restrictor The thickness of the surfacing wear-resistant layer on the inner wall is 5mm, the length of the restrictor is 2000mm, the inner diameter of the restrictor is gradually reduced from 195mm to 100mm, the length of the opening is 200mm, and the inner diameter is 195mm. The filling slurry initially sets after 240 minutes after entering the filling area. The height of the filling slurry 8 in the standpipe 5 remained constant after 200m, and the pipeline was transported stably within 30 days, without shut-off vibration and pipeline blockage.

Embodiment 3

[0021] After the length of the filling main line is shortened to 250m, it is detected that the flow velocity of the filling slurry reaches 1.8m / s; a flow limiter 1 is added on the horizontal pipe between the standpipe 5 and the valve 2, the total length is 2750mm, and the surfacing welding resistance The thickness of the abrasive layer is 7 mm, the inner diameter of the restrictor 6 is gradually reduced from 195 mm to 100 mm, and the inner diameter of the opening 9 is 195 mm. The filling slurry initially sets after 240 minutes after entering the filling area. The height of the filling slurry 8 in the standpipe 5 remained constant after 200m, and the pipeline was transported stably within 30 days, without shut-off vibration and pipeline blockage.

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Abstract

The invention discloses a flowing-speed-limiting device for a coal mine high-pressure filling pipeline and belongs to the technical field of coal mine filling material pipeline conveying equipment. The flowing-speed-limiting device comprises a vertical pipe (5) in the filling main pipeline and a transverse pipe connected to the lower portion of the vertical pipe (5) and provided with a valve (2). The flowing-speed-limiting device is characterized in that a flowing-speed-liming device body (1) is arranged on the transverse pipe between the vertical pipe (5) and the valve (2), and a through hole is formed in the pipe wall of the upper portion of the vertical pipe (5). Split slurry (7) is arranged in the main pipeline connected to the top of the vertical pipe (5), and filling slurry (8) is arranged in the middle and on the lower portion of the vertical pipe (5) and in the transverse pipe connected to the lower portion of the vertical pipe (5) in a left-and-right mode due to flowing speed limiting of the flowing-speed-limiting device body (1). Due to the filling slurry (8) in the vertical pipe (5), the falling head of the split slurry (7) in the main pipeline is greatly reduced after the slurry enters the vertical pipe (5), and impact is reduced. The flowing-speed-limiting device is additionally arranged in the pipeline, so that the diameter range in which the slurry passes is reduced, flowing speed is decreased, falling speed of the slurry in the vertical pipe is limited, and the small falling head is kept.

Description

technical field [0001] The utility model relates to a high-pressure coal mine filling pipeline current limiting device, which belongs to the technical field of coal mine filling material pipeline transportation equipment technical field. Background technique [0002] During the coal mine filling process, as the filling project progresses, the length of the main filling line pipeline will gradually become shorter, resulting in a decrease in the resistance of the filling slurry in the pipeline, and an increase in the flow rate of the filling slurry in the pipeline. Filling pump pumping, one pumping stroke reaches 0.23m 3 , the slurry is split into the standpipe, if the flow rate of the slurry in the standpipe is too fast, there will be no slurry in the standpipe and a vacuum will be formed, and when the split slurry slides into the standpipe, the drop will be too large, causing a strong impact on the bottom of the standpipe , affecting pipeline life and normal production. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L55/027F16L55/045E21F15/00
CPCE21F15/00F16L55/027F16L55/045
Inventor 孙希奎张玉军江兆利施现院谢志鸿王业超毕智强
Owner SHANDONG KANGER ENERGY TECH CO LTD