CN109404032A - A kind of underground air supply device of the coal mine digging convenient for filtering - Google Patents

A kind of underground air supply device of the coal mine digging convenient for filtering Download PDF

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Publication number
CN109404032A
CN109404032A CN201811513958.5A CN201811513958A CN109404032A CN 109404032 A CN109404032 A CN 109404032A CN 201811513958 A CN201811513958 A CN 201811513958A CN 109404032 A CN109404032 A CN 109404032A
Authority
CN
China
Prior art keywords
bleed
passage
piping
fixed
filtering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811513958.5A
Other languages
Chinese (zh)
Inventor
刘勇
冷光海
刘明耀
唐剑波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou University
Original Assignee
Guizhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou University filed Critical Guizhou University
Priority to CN201811513958.5A priority Critical patent/CN109404032A/en
Publication of CN109404032A publication Critical patent/CN109404032A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00Ventilation of mines or tunnels; Distribution of ventilating currents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66Regeneration of the filtering material or filter elements inside the filter
    • B01D46/74Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/04Air ducts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/582Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5846Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling by injection
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/705Adding liquids

Abstract

The invention discloses a kind of underground air supply device of coal mine digging convenient for filtering, including fixed -piping and strainer, the inside of the fixed -piping is successively divided into inlet channel from outside to inside, water cavity and bleed-off passage, the left side of the bleed-off passage is run through from the left side of fixed -piping, and exhaust outlet is provided on the left of bleed-off passage, end on the outside of the fixed -piping is equipped with air-vent, sliding rail is installed on the inner wall of the bleed-off passage, the formula that is internally embedded of the blade is equipped with the second magnetic patch, the left end of the bleed-off passage is provided with water inlet line, and water inlet line runs through stretching from the surface of fixed -piping.The underground air supply device that the coal mine digging is used convenient for filtering, three inlet channel, water cavity and bleed-off passage pipelines are integration, reduce the space of installation, improve the efficiency of gas transport, and when exhaust gas is discharged from pump-line, heat is absorbed by the water inside water cavity, reduces the temperature of exhaust gas.

Description

A kind of underground air supply device of the coal mine digging convenient for filtering
Technical field
The present invention relates to coal mine digging technical field, specially a kind of coal mine digging is used the underground convenient for filtering to blow and is filled It sets.
Background technique
Coal mine is as the most important component part of national economy, and when carrying out digging to coal, coal is from conveyer It is sent, a large amount of dust is flooded in well, to need to carry out inside air-supply processing, improve the oxygen content in well.It is existing Air supply device and extractor fan be to be independently arranged, mounting cost is higher, and exhaust gas not can be carried out when sending out in well Filter, inside contain a large amount of heat and flue gas, are expelled directly out and pollute to atmosphere.
Summary of the invention
The purpose of the present invention is to provide a kind of underground air supply device of coal mine digging convenient for filtering, to solve above-mentioned back It is proposed air supply device is to be independently arranged with extractor fan in scape technology, and mounting cost is higher, and exhaust gas is when sending out in well, no It can be carried out filtering, inside contains a large amount of heat and flue gas, is expelled directly out the problem of polluting to atmosphere.
To achieve the above object, the invention provides the following technical scheme: a kind of coal mine digging is sent with the underground convenient for filtering Wind apparatus, including fixed -piping and strainer, the inside of the fixed -piping be successively divided into from outside to inside inlet channel, water cavity and Bleed-off passage, and the inner surface of water cavity is equipped with spray head, the spray head is located on the inner wall of bleed-off passage, and the right side of bleed-off passage Side is provided with inlet scoop, and the left side of the bleed-off passage is run through from the left side of fixed -piping, and is provided on the left of bleed-off passage Exhaust outlet is equipped with admission line below the fixed -piping, and admission line and inlet channel perforation connect, the fixation End on the outside of pipeline is equipped with air-vent, and sliding rail is equipped on the inner wall of the bleed-off passage, and the strainer is pacified by surface The spring of dress and the inner wall of bleed-off passage are connected with each other, and the back side of strainer is equipped with bracket, and the end of bracket is equipped with First magnetic patch, the inside of the bleed-off passage is equipped with shaft, and blade is equipped on the outside of shaft, and the inside of the blade is embedding Enter formula and the second magnetic patch is installed, the left end of the bleed-off passage is provided with water inlet line, and water inlet line is from the table of fixed -piping Face is through stretching.
Preferably, the inlet channel, water cavity and bleed-off passage structure independent sealed each other, and the inside of inlet channel Surface and bleed-off passage outer surface are connected with each other with inlet channel.
Preferably, the inside of the water cavity is held by angularly isolation for 6 independent spaces, and between inner surface of water cavity etc. Away from being arranged with 6 spray heads.
Preferably, the two sides of the strainer and sliding rail constitute slide construction, and the surface of strainer is in that 4 bullets are provided with to this Spring.
Preferably, first magnetic patch and the second magnetic patch are synonyms pole, and the bracket of the first magnetic patch and incline structure is solid Fixed connection.
Preferably, the blade is arranged symmetrically in the outside of shaft, and divides horizontal line and the first magnetic patch in blade Middle separated time is same level.
Compared with prior art, the beneficial effects of the present invention are: the coal mine digging use convenient for filtering underground air supply device,
1. the inside of fixed -piping is set as three independent sealed spaces, thus inlet channel, water cavity and bleed-off passage three Pipeline is integration, reduces the space of installation, improves the efficiency of gas transport, and when exhaust gas is discharged from pump-line, heat It is absorbed by the water inside water cavity, reduces the temperature of exhaust gas;
2. the inside setting of bleed-off passage is by blade, so that blade drives the second magnetic patch to be moved when rotating, to drive filter Net is moved, and is provided with spring, and strainer Rapid reset is had so that the cigarette ash of screen surface attachment is fallen Effect avoids filter net jam;
3. spray head is provided with, so that the water inside water cavity is sprayed onto the inside of pump-line by spray head, convenient for pump-line Inside cleaned, be convenient to clean.
Detailed description of the invention
Fig. 1 is overall structure of the present invention;
Fig. 2 is enlarged structure schematic diagram at A in Fig. 1 of the present invention;
Fig. 3 is cross section structure schematic diagram of the present invention;
Fig. 4 is bleed-off passage of the present invention and screen mounting structure schematic diagram.
In figure: 1, fixed -piping;2, inlet channel;3, water cavity;4, bleed-off passage;5, spray head;6, inlet scoop;7, it is vented Mouthful;8, admission line;9, air-vent;10, sliding rail;11, spring;12, strainer;13, bracket;14, the first magnetic patch;15, shaft; 16, blade;17, the second magnetic patch;18, water inlet line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Fig. 1-4 is please referred to, the present invention provides a kind of technical solution: a kind of coal mine digging underground air-supply dress for being convenient for filtering It sets, including fixed -piping 1, inlet channel 2, water cavity 3, bleed-off passage 4, spray head 5, inlet scoop 6, exhaust outlet 7, admission line 8, draws Air port 9, sliding rail 10, spring 11, strainer 12, bracket 13, the first magnetic patch 14, shaft 15, blade 16, the second magnetic patch 17 and water inlet pipe Road 18, the inside of fixed -piping 1 is successively divided into inlet channel 2, water cavity 3 and bleed-off passage 4 from outside to inside, and water cavity 3 is interior Surface is equipped with spray head 5, inlet channel 2, water cavity 3 and the independent sealed each other structure of bleed-off passage 4, and inlet channel 2 is interior Side surface and 4 outer surface of bleed-off passage are connected with each other with inlet channel 2, so that the heat transfer inside bleed-off passage 4 is given Water cavity 3 plays the role of reducing flue gas heat, and the water in water cavity 3 can wash away the flue dust inside bleed-off passage 4;
The inside of water cavity 3 is held by angularly isolation as 6 independent spaces, and the inner surface of water cavity 3 is equidistantly arranged with 6 sprays First 5, so that water is uniformly flowed through from water cavity 3, and the water inside each separate space is uniformly sprayed by spray head 5;
Spray head 5 is located on the inner wall of bleed-off passage 4, and the right side of bleed-off passage 4 is provided with inlet scoop 6, the left side of bleed-off passage 4 Run through from the left side of fixed -piping 1, and the left side of bleed-off passage 4 is provided with exhaust outlet 7, the lower section of fixed -piping 1 be equipped with into Feed channel 8, and admission line 8 and the perforation of inlet channel 2 connect, the end in 1 outside of fixed -piping is equipped with air-vent 9, is evacuated Sliding rail 10 is installed, the inner wall of the spring 11 that strainer 12 is installed by surface and bleed-off passage 4 mutually interconnects on the inner wall in channel 4 Connect, and the back side of strainer 12 is equipped with bracket 13, and the end of bracket 13 is equipped with the first magnetic patch 14, the two sides of strainer 12 with Sliding rail 10 constitutes slide construction, and the surface of strainer 12 is in being provided with 4 springs 11 to this, spring 11 to strainer 12 uniformly by Power, strainer 12 drive spring 11 to be moved;
The inside of bleed-off passage 4 is equipped with shaft 15, and the outside of shaft 15 is equipped with blade 16, and blade 16 is in the outer of shaft 15 Side is arranged symmetrically, and the middle separated time of horizontal line and the first magnetic patch 14 is divided to be same level in blade 16, thus blade 16 It drives the first magnetic patch 14 to be moved by the second magnetic patch 17, shakes off convenient for the dust on strainer 12;
The formula that is internally embedded of blade 16 is equipped with the second magnetic patch 17, and the first magnetic patch 14 and the second magnetic patch 17 are synonyms pole, and the One magnetic patch 14 is fixedly connected with the bracket 13 of incline structure, and the first magnetic patch 14 and strainer 12 are there are gap, and the first magnetic patch 14 It attracts each other under magneticaction with the second magnetic patch 17, to be connected with each other with electric filter 12, the left end of bleed-off passage 4 is provided with Water inlet line 18, and water inlet line 18 runs through stretching from the surface of fixed -piping 1.
Working principle: exhaust outlet 7 and external air pump are installed, and admission line 8 and external air feed pump carry out Installation, and cold water is injected in water inlet line 18, so that cold water enters the inside of water cavity 3, starting row by water inlet line 18 The external air pump of port 7, so that the gas in well is discharged by inlet scoop 6, when the inside that gas enters, air-flow band movable vane piece 16 It is rotated, so that second magnetic patch 17 on 16 surface of blade is also rotated in the outside of shaft 15, thus when the second magnetic patch 17 When contacting the first magnetic patch 14, the first magnetic patch 14 by magnetic force attraction and move right, i.e. the first magnetic patch 14 pass through 13 band of bracket Electric filter 12 moves right, and the two sides of strainer 12 move right along sliding rail 10, then works as blade 16 and rotates backward, the first magnetic patch 14 separate with the second magnetic patch 17, so that the first magnetic patch 14 is moved to the left under the pressure of air-flow, 12 compressed spring 11 of strainer, thus Strainer 12 is flicked again after the compression of spring 11, strainer 12 is moved by the attraction of the second magnetic patch 17, so that Strainer 12 moves reciprocatingly always, consequently facilitating the ash that 12 surface of strainer is saved bit by bit is fallen, strainer 12 is avoided to block, in exhaust gas Heat transfer carries out cooling processing to water cavity 3, to exhaust gas, and when purifying to exhaust gas, opens spray head 5, the water in water cavity 3 It is sprayed from spray head 5, the dust inside bleed-off passage 4 is washed away, and clean air enters inlet channel by admission line 8 2 inside, then clean air is injected into underground by air-vent 9.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (6)

1. the underground air supply device that a kind of coal mine digging is used convenient for filtering, including fixed -piping (1) and strainer (12), feature exists In: the inside of the fixed -piping (1) is successively divided into inlet channel (2), water cavity (3) and bleed-off passage (4) from outside to inside, and The inner surface of water cavity (3) is equipped with spray head (5), and the spray head (5) is located on the inner wall of bleed-off passage (4), and bleed-off passage (4) Right side be provided with inlet scoop (6), the left side of the bleed-off passage (4) is run through from the left side of fixed -piping (1), and bleed-off passage (4) it is provided with exhaust outlet (7), is equipped with admission line (8) below the fixed -piping (1), and admission line (8) on the left of It penetrates through and connects with inlet channel (2), the end on the outside of the fixed -piping (1) is equipped with air-vent (9), the bleed-off passage (4) it is equipped on inner wall sliding rail (10), the spring (11) that the strainer (12) is installed by surface is interior with bleed-off passage (4) Wall is connected with each other, and the back side of strainer (12) is equipped with bracket (13), and the end of bracket (13) is equipped with the first magnetic patch (14), the inside of the bleed-off passage (4) is equipped with shaft (15), and blade (16) are equipped on the outside of shaft (15), described The formula that is internally embedded of blade (16) is equipped with the second magnetic patch (17), and the left end of the bleed-off passage (4) is provided with water inlet line (18), and water inlet line (18) from the surface of fixed -piping (1) through stretch out.
2. the underground air supply device that a kind of coal mine digging according to claim 1 is used convenient for filtering, it is characterised in that: described Inlet channel (2), water cavity (3) and the independent sealed each other structure of bleed-off passage (4), and the inner surface of inlet channel (2) and Bleed-off passage (4) outer surface is connected with each other with inlet channel (2).
3. the underground air supply device that a kind of coal mine digging according to claim 1 is used convenient for filtering, it is characterised in that: described The inside of water cavity (3) is held by angularly isolation as 6 independent spaces, and the inner surface of water cavity (3) is equidistantly arranged with 6 sprays Head (5).
4. the underground air supply device that a kind of coal mine digging according to claim 1 is used convenient for filtering, it is characterised in that: described The two sides and sliding rail (10) of strainer (12) constitute slide construction, and the surface of strainer (12) is in that 4 springs (11) are provided with to this.
5. the underground air supply device that a kind of coal mine digging according to claim 1 is used convenient for filtering, it is characterised in that: described First magnetic patch (14) and the second magnetic patch (17) are synonyms pole, and the bracket (13) of the first magnetic patch (14) and incline structure is fixed and connected It connects.
6. the underground air supply device that a kind of coal mine digging according to claim 1 is used convenient for filtering, it is characterised in that: described Blade (16) is arranged symmetrically in the outside of shaft (15), and divides in horizontal line and the first magnetic patch (14) in blade (16) and divide Line is same level.
CN201811513958.5A 2018-12-11 2018-12-11 A kind of underground air supply device of the coal mine digging convenient for filtering Pending CN109404032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811513958.5A CN109404032A (en) 2018-12-11 2018-12-11 A kind of underground air supply device of the coal mine digging convenient for filtering

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Application Number Priority Date Filing Date Title
CN201811513958.5A CN109404032A (en) 2018-12-11 2018-12-11 A kind of underground air supply device of the coal mine digging convenient for filtering

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111233588A (en) * 2020-03-19 2020-06-05 江西宜丰国泰化工有限责任公司 Pneumatic continuous explosive mixing device for production of expanded explosives
CN112791528A (en) * 2020-12-30 2021-05-14 重庆桃园金属表面处理有限公司 Electroplating environment air circulation system
CN113565569A (en) * 2021-07-21 2021-10-29 贵州省矿山安全科学研究院有限公司 Coal mine risk early warning system based on big data analysis

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05248198A (en) * 1992-03-06 1993-09-24 Kumagai Gumi Co Ltd Air cleaning method in tunnel, etc.
JP2007162453A (en) * 2005-11-15 2007-06-28 Sakamoto Shokai:Kk Ventilation system in tunnel
CN102174895A (en) * 2011-02-25 2011-09-07 湖南科技大学 Dust collection and removal device for mine machine excavation working surface
CN103206235A (en) * 2013-03-29 2013-07-17 枣庄矿业(集团)有限责任公司滨湖煤矿 Low-concentration short-distance closed gas emission device
CN106050289A (en) * 2016-06-30 2016-10-26 徐州安普瑞特能源科技有限公司 Movable mine ventilation device
CN206286185U (en) * 2016-12-19 2017-06-30 黄河科技学院 A kind of construction site high efficiency screening device
CN206554966U (en) * 2017-01-16 2017-10-13 王志国 A kind of metal mine underground ventilating device
CN108854225A (en) * 2018-07-25 2018-11-23 莆田市山水牧歌贸易有限公司 It is a kind of that the filter screen of the attracting principle vibration that repels each other of magnet as power and is utilized using water

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05248198A (en) * 1992-03-06 1993-09-24 Kumagai Gumi Co Ltd Air cleaning method in tunnel, etc.
JP2007162453A (en) * 2005-11-15 2007-06-28 Sakamoto Shokai:Kk Ventilation system in tunnel
CN102174895A (en) * 2011-02-25 2011-09-07 湖南科技大学 Dust collection and removal device for mine machine excavation working surface
CN103206235A (en) * 2013-03-29 2013-07-17 枣庄矿业(集团)有限责任公司滨湖煤矿 Low-concentration short-distance closed gas emission device
CN106050289A (en) * 2016-06-30 2016-10-26 徐州安普瑞特能源科技有限公司 Movable mine ventilation device
CN206286185U (en) * 2016-12-19 2017-06-30 黄河科技学院 A kind of construction site high efficiency screening device
CN206554966U (en) * 2017-01-16 2017-10-13 王志国 A kind of metal mine underground ventilating device
CN108854225A (en) * 2018-07-25 2018-11-23 莆田市山水牧歌贸易有限公司 It is a kind of that the filter screen of the attracting principle vibration that repels each other of magnet as power and is utilized using water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111233588A (en) * 2020-03-19 2020-06-05 江西宜丰国泰化工有限责任公司 Pneumatic continuous explosive mixing device for production of expanded explosives
CN112791528A (en) * 2020-12-30 2021-05-14 重庆桃园金属表面处理有限公司 Electroplating environment air circulation system
CN113565569A (en) * 2021-07-21 2021-10-29 贵州省矿山安全科学研究院有限公司 Coal mine risk early warning system based on big data analysis
CN113565569B (en) * 2021-07-21 2023-06-20 贵州省矿山安全科学研究院有限公司 Coal mine risk early warning system based on big data analysis

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