CN104265272A - High-precision coal slime water level measuring device - Google Patents

High-precision coal slime water level measuring device Download PDF

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Publication number
CN104265272A
CN104265272A CN201410529222.2A CN201410529222A CN104265272A CN 104265272 A CN104265272 A CN 104265272A CN 201410529222 A CN201410529222 A CN 201410529222A CN 104265272 A CN104265272 A CN 104265272A
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China
Prior art keywords
infrared
receiver
water level
level measuring
infrared transmitter
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Granted
Application number
CN201410529222.2A
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Chinese (zh)
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CN104265272B (en
Inventor
范鑫杰
张丽军
赵利
方炜
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Shanxi Dade Measurement And Control Technology Co ltd
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SHANXI DEDICATED MEASUREMENT CONTROL CO Ltd
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Priority to CN201410529222.2A priority Critical patent/CN104265272B/en
Publication of CN104265272A publication Critical patent/CN104265272A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/04Measuring depth or liquid level
    • E21B47/047Liquid level
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/04Measuring depth or liquid level

Abstract

The invention relates to a high-precision coal slime water level measuring device and belongs to the technical field of coal slime water level measuring. The high-precision coal slime water level measuring device is high in measurement precision and reliability. The technical scheme includes that the high-precision coal slime water level measuring device comprises a base, wherein a photoelectric beam detector is arranged on the base and comprises an infrared emitter and an infrared receiver. A plurality of emitting holes for emitting horizontal infrared rays are formed on the infrared emitter, and the infrared receiver is correspondingly provided with a plurality of receiving holes for receiving the horizontal infrared rays emitted by the infrared emitter. The infrared emitter and the infrared receiver are connected with a controller, and a floater capable of moving vertically along the outer wall of the infrared emitter is sleeved on the infrared emitter. The high-precision coal slime water level measuring device is applicable to the field of coal mines.

Description

High accuracy black water level measuring arrangement
Technical field
The invention belongs to the technical field of coal slime level measuring, be specifically related to a kind of high-precision black water level measuring arrangement.
Background technology
Usually, in progress of coal mining, because earth formation is destroyed, exploiting field is communicated with reservoir bed, underground water can flow into tunnel and work plane, easy generation water inrush accident, the production of down-hole is caused to be hindered, construction safety performance reduces, may cause a serious accident time serious, bring grave danger not only to the life security of underground operators, also can cause serious economic loss to enterprise, therefore, need in time the mine ponding flowed in downhole coal mine tunnel to be drained into earth's surface, guarantee the safety in production in colliery, and one of mine water level monitoring security parameter that to be Mine Drainage System important, want timely draining, just must carry out real-time monitoring to mine water level.
Due to underground coal mine bad environments, there is a large amount of coal slimes, therefore when measuring underground coal mine water level, not only needing to measure water level depth, also needing the thickness measuring coal slime, at present, in field, colliery, ball float level controller or these two kinds of modes of isotope are mostly adopted to detect moisture of coal fines interface, wherein, ball float level controller is by the change of ballottement by liquid level, by the transmission of magnetic force axle, realize the control to liquid level and warning, but the method cannot be measured the degree of depth of coal slime, and the interfacial method of isotope on-line checkingi black water, the position of solid-liquid interface can be determined, but this device cannot to coal slime thickness, water level depth is accurately measured, can only by moved by hand and judgement, there is larger error, cause the certainty of measurement of coal slime water level low, poor reliability, along with taking place frequently of coal mining accident in recent years, the requirement of safety of coal mines is more and more higher, therefore there is high accuracy, the black water level measuring arrangement of high reliability seems particularly important.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of high accuracy black water level measuring arrangement not only can measured water level depth but also can measure coal slime thickness.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: high accuracy black water level measuring arrangement, comprise base, described base is provided with infrared emission device, described infrared emission device comprises infrared transmitter and infrared remote receiver, described infrared transmitter have multiple for the ultrared launch hole of described infrared remote receiver emission level, described infrared remote receiver has accordingly multiple receiver hole launching the level infrared light come for receiving described infrared transmitter, described infrared transmitter is all connected with controller with infrared remote receiver, described infrared transmitter is arranged with the float that can move up and down along infrared transmitter outer wall.
Described infrared transmitter comprises launcher shell and is positioned at the infrared emitting plate of described launcher shell, and described infrared remote receiver comprises receiver casing and is positioned at the infrared receiver plate of described receiver casing; Described launcher shell is identical with the size and shape of receiver casing, and the hollow cylindrical all in upper and lower opening, and interval is vertically fixed on described base; On the outer circumference surface that described launch hole and described receiver hole lay respectively at described launcher shell and on the outer circumference surface of described receiver casing, make between described infrared transmitter and described infrared remote receiver, to be covered with mutual in the vertical direction tool level infrared light at regular intervals; Described base is provided with two boss, and two described boss are all connected with the bottom of described launcher shell and the bottom of described receiver casing respectively by screw thread, and arrange hexagonal clamp nut at two place's joints respectively; Described float is hollow stainless steel through-hole type ball float, and is sheathed on the outer circumference surface of described launcher shell; Described launcher shell inside and described receiver casing inside are all by colloid envelope note; The top of described infrared transmitter is provided with the end cap for preventing described float from coming off; The top of described infrared transmitter and the top of described infrared remote receiver are provided with circular socket, and two described circular sockets are connected with described controller respectively by cable; Described controller is provided with display lamp, and described display lamp is connected with described infrared remote receiver.
The present invention compared with prior art has following beneficial effect:
Black water level measuring arrangement in the present invention comprises base, base is provided with infrared emission device, infrared emission device comprises infrared transmitter and infrared remote receiver, infrared transmitter have multiple for the ultrared launch hole of described infrared remote receiver emission level, infrared remote receiver has accordingly multiple receiver hole launching the level infrared light come for receiving described infrared transmitter, infrared transmitter is all connected with controller with infrared remote receiver, infrared transmitter is arranged with the float that can move up and down along infrared transmitter outer wall, during use, whole base is fixed on the lowest part of black water accumulation place, under normal circumstances, the infrared rays of multiple tracks level is there is between infrared transmitter and infrared remote receiver, formed " infrared theft wall " that one human eye not can't see, along with the accumulation of black water, coal slime thickness and water level depth raise gradually, in the process that coal slime thickness raises, the coal slime of up piling up gradually can block the launch hole on infrared transmitter and the receiver hole on infrared remote receiver from the bottom up gradually, the infrared opposite-radiation of launch hole corresponding between infrared transmitter and infrared remote receiver and receiver hole is caused to interrupt, now, controller receives the signal that infrared opposite-radiation interrupts, coal slime thickness can be drawn by calculating, in the process that water level rises, the float be enclosed within infrared transmitter can move up, because infrared rays can transmit in water, therefore when float rises, the launch hole of a certain position on infrared transmitter can be sheltered from, cause the infrared opposite-radiation of launch hole corresponding between infrared transmitter and infrared remote receiver and receiver hole to interrupt, now, controller receives the signal that infrared opposite-radiation interrupts, and can draw water level depth by calculating, after coal slime thickness or water level depth exceed the higher limit arranged in controller, controller can send alarm signal, enters alarm condition, and whole apparatus structure is simple, and in-site installation is easy to adjust, simple to operate, and accuracy is high, can greatly increase work efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail;
Fig. 1 is the structural representation in the present invention;
In figure: 1 is base, 2 is launch hole, and 3 is receiver hole, and 4 is controller, and 5 is float, and 6 is launcher shell, and 7 is infrared emitting plate, and 8 is receiver casing, and 9 is infrared receiver plate, and 10 is hexagonal clamp nut, and 11 is end cap.
Detailed description of the invention
As shown in Figure 1, high accuracy black water level measuring arrangement of the present invention, comprise base 1, described base 1 is provided with infrared emission device, described infrared emission device comprises infrared transmitter and infrared remote receiver, described infrared transmitter have multiple for the ultrared launch hole 2 of described infrared remote receiver emission level, described infrared remote receiver has accordingly multiple receiver hole 3 launching the level infrared light come for receiving described infrared transmitter, described infrared transmitter and infrared remote receiver are all connected with controller 4, described infrared transmitter is arranged with the float 5 that can move up and down along infrared transmitter outer wall, particularly, described infrared transmitter comprises launcher shell 6 and is positioned at the infrared emitting plate 7 of described launcher shell 6, described infrared remote receiver comprises receiver casing 8 and is positioned at the infrared receiver plate 9 of described receiver casing 8, described launcher shell 6 is identical with the size and shape of receiver casing 8, and the hollow cylindrical all in upper and lower opening, and interval is vertically fixed on described base 1, on the outer circumference surface that described launch hole 2 and described receiver hole 3 lay respectively at described launcher shell 6 and on the outer circumference surface of described receiver casing 8, make between described infrared transmitter and described infrared remote receiver, to be covered with mutual in the vertical direction tool level infrared light at regular intervals, in order to fix described infrared emitting plate 7 and described infrared receiver plate 9 and prevent them from being corroded by black water, described launcher shell 6 inside and described receiver casing 8 inside are all by colloid envelope note.
In the present embodiment, described multiple launch holes 2 are set in turn on that bus that on described launcher shell 6, described in distance, receiver casing 8 is nearest from top to bottom, and the distance between adjacent two launch holes 2 is 15mm, the launch hole 2 being positioned at bottom is 20mm with the vertical distance bottom described launcher shell 6, be arranged at the quantity of the multiple receiver holes 3 on described receiver casing 8 and position and described multiple launch holes 2 one_to_one corresponding, namely described multiple receiver holes 3 are set in turn on that bus that on described receiver casing 8, described in distance, launcher shell 6 is nearest from top to bottom, and the distance between adjacent two receiver holes 3 is 15mm, the receiver hole 3 being positioned at bottom is 20mm with the vertical distance bottom described receiver casing 8, the Grating examinations distance of infrared transmitter of the present invention is made to reach 1m, adjacent two grating space 15mm, detection range is large, accuracy of detection is high, described multiple launch holes 2 and multiple receiver hole 3 toward each other, and with suitable height and angular alignment, avoid dead band, prevent the interference of external light source and high reflectance reflections off objects, during device work, the launch hole 2 of infrared transmitter launches infrared rays, receiver hole 3 receiving infrared-ray of infrared remote receiver, when a certain height infrared rays because coal slime or blocking of float 5 and interrupt transfer time, controller 4 reads the data signal of infrared remote receiver in real time, is finally converted into the analog quantity representing coal slime thickness and water level depth, in the present embodiment, described launcher shell 6 and described receiver casing 8 are made by stainless steel, and long period of soaking is not perishable under water, not yielding.
Particularly, the top of described infrared transmitter and the top of described infrared remote receiver all can arrange circular socket, two described circular sockets are connected with described controller 4 respectively by cable, described controller 4 also can be arranged the display lamp whether infrared rays for pointing out described infrared remote receiver to receive interrupts, described display lamp is connected with described infrared remote receiver, the top of described infrared transmitter also can arrange the end cap 11 for preventing described float 5 from coming off, further, described float 5 can be hollow stainless steel through-hole type ball float, be sheathed on the outer circumference surface of described launcher shell 6, the vertical height of described float 5 is 15mm, described base 1 can be provided with two boss, two described boss are all connected with the bottom of described launcher shell 6 and the bottom of described receiver casing 8 respectively by screw thread, and respectively hexagonal clamp nut 10 is set at two place's joints.
The invention provides high accuracy black water level measuring arrangement, utilize the particular design of optical system, frame for movement, infrared transmitter, infrared remote receiver are calibrated convenient, effectively can prevent the interference of electromagnetic signal, strobelight, welding arc light, around power supply, can black water bit depth in Real-Time Monitoring mine by distinctive infrared emission device, solve that traditional black water level measuring arrangement accuracy is low, the problem of poor reliability, there is outstanding substantive distinguishing features and significant progressive; By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.

Claims (8)

1. high accuracy black water level measuring arrangement, it is characterized in that: comprise base (1), described base (1) is provided with infrared emission device, described infrared emission device comprises infrared transmitter and infrared remote receiver, described infrared transmitter have multiple for the ultrared launch hole of described infrared remote receiver emission level (2), described infrared remote receiver has accordingly multiple receiver hole (3) launching the level infrared light come for receiving described infrared transmitter, described infrared transmitter and infrared remote receiver are all connected with controller (4), described infrared transmitter is arranged with the float (5) that can move up and down along infrared transmitter outer wall.
2. high accuracy black water level measuring arrangement according to claim 1, it is characterized in that: described infrared transmitter comprises launcher shell (6) and is positioned at the infrared emitting plate (7) of described launcher shell (6), described infrared remote receiver comprises receiver casing (8) and is positioned at the infrared receiver plate (9) of described receiver casing (8); Described launcher shell (6) is identical with the size and shape of receiver casing (8), and the hollow cylindrical all in upper and lower opening, and interval is vertically fixed on described base (1); On the outer circumference surface that described launch hole (2) and described receiver hole (3) lay respectively at described launcher shell (6) and on the outer circumference surface of described receiver casing (8), make between described infrared transmitter and described infrared remote receiver, to be covered with mutual in the vertical direction tool level infrared light at regular intervals.
3. high accuracy black water level measuring arrangement according to claim 2, it is characterized in that: described base (1) is provided with two boss, two described boss are all connected with the bottom of described launcher shell (6) and the bottom of described receiver casing (8) respectively by screw thread, and arrange hexagonal clamp nut (10) at two place's joints respectively.
4. high accuracy black water level measuring arrangement according to claim 2, is characterized in that: described float (5) is hollow stainless steel through-hole type ball float, and is sheathed on the outer circumference surface of described launcher shell (6).
5. high accuracy black water level measuring arrangement according to claim 2, is characterized in that: described launcher shell (6) inside and described receiver casing (8) inside are all by colloid envelope note.
6., according to described high accuracy black water level measuring arrangement arbitrary in claim 1 to 5, it is characterized in that: the top of described infrared transmitter is provided with the end cap (11) for preventing described float (5) from coming off.
7. according to described high accuracy black water level measuring arrangement arbitrary in claim 1 to 5, it is characterized in that: the top of described infrared transmitter and the top of described infrared remote receiver are provided with circular socket, two described circular sockets are connected with described controller (4) respectively by cable.
8., according to described high accuracy black water level measuring arrangement arbitrary in claim 1 to 5, it is characterized in that: (4) are provided with display lamp with described controller, and described display lamp is connected with described infrared remote receiver.
CN201410529222.2A 2014-10-10 2014-10-10 High-precision coal slime water level measuring device Active CN104265272B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104913831A (en) * 2015-06-12 2015-09-16 山西戴德测控技术有限公司 Device for simultaneous hierarchical measurement of water level and water-mud mixture level
CN106761689A (en) * 2016-12-27 2017-05-31 中国石油天然气股份有限公司 A kind of oil jacket annulus liquid level monitoring method and system
CN108759984A (en) * 2018-07-25 2018-11-06 江苏雅凯医疗科技有限公司 A kind of transparent pipeline liquid level emasuring device
CN110274999A (en) * 2019-07-19 2019-09-24 重庆科技学院 Modified is bubbled sulfuric acid standard humidity generator and its variable data accurate calculation method
CN113532361A (en) * 2021-06-21 2021-10-22 上海电机学院 Coal slurry depth and liquid level height detection device and method for water suction well of coal mine pump room
CN114459282A (en) * 2022-02-14 2022-05-10 东莞市山普斯科技有限公司 Automatic water gun
CN115206071A (en) * 2022-07-27 2022-10-18 招商局重庆交通科研设计院有限公司 Tunnel sand sediment well height monitoring system
CN116294172A (en) * 2023-05-15 2023-06-23 中科长洋(山东)科技有限公司 Air conditioner with condensate water upper drainage module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109632052A (en) * 2018-12-17 2019-04-16 中国电子科技集团公司第四十九研究所 A kind of multimedium liquid level sensor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2227821Y (en) * 1994-12-20 1996-05-22 范宇航 Infrared fluid level gage
WO1998012514A1 (en) * 1996-09-20 1998-03-26 Vista Research, Inc. Gauge for measuring liquid levels
US20020023490A1 (en) * 2000-08-24 2002-02-28 Burns Alan Alexander Absolute liquid level sensor with digital refractive encoding
CN201438127U (en) * 2009-07-01 2010-04-14 廊坊市轩慧电视安装服务有限公司 Precise liquid level sensor
CN201540141U (en) * 2009-10-23 2010-08-04 丁云明 Mud level meter
CN102221392A (en) * 2011-03-31 2011-10-19 武汉理工大学 Liquid level measurement method based on magnetic coupling and optical fiber pair array
CN202903283U (en) * 2012-11-07 2013-04-24 李毅 Novel water level detector applicable to complicated conditions
CN204113276U (en) * 2014-10-10 2015-01-21 山西戴德测控技术有限公司 A kind of high accuracy black water level measuring arrangement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2227821Y (en) * 1994-12-20 1996-05-22 范宇航 Infrared fluid level gage
WO1998012514A1 (en) * 1996-09-20 1998-03-26 Vista Research, Inc. Gauge for measuring liquid levels
US20020023490A1 (en) * 2000-08-24 2002-02-28 Burns Alan Alexander Absolute liquid level sensor with digital refractive encoding
CN201438127U (en) * 2009-07-01 2010-04-14 廊坊市轩慧电视安装服务有限公司 Precise liquid level sensor
CN201540141U (en) * 2009-10-23 2010-08-04 丁云明 Mud level meter
CN102221392A (en) * 2011-03-31 2011-10-19 武汉理工大学 Liquid level measurement method based on magnetic coupling and optical fiber pair array
CN202903283U (en) * 2012-11-07 2013-04-24 李毅 Novel water level detector applicable to complicated conditions
CN204113276U (en) * 2014-10-10 2015-01-21 山西戴德测控技术有限公司 A kind of high accuracy black water level measuring arrangement

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104913831A (en) * 2015-06-12 2015-09-16 山西戴德测控技术有限公司 Device for simultaneous hierarchical measurement of water level and water-mud mixture level
CN106761689A (en) * 2016-12-27 2017-05-31 中国石油天然气股份有限公司 A kind of oil jacket annulus liquid level monitoring method and system
CN108759984A (en) * 2018-07-25 2018-11-06 江苏雅凯医疗科技有限公司 A kind of transparent pipeline liquid level emasuring device
CN108759984B (en) * 2018-07-25 2023-12-26 江苏雅凯医疗科技有限公司 Transparent pipeline liquid level measurement device
CN110274999A (en) * 2019-07-19 2019-09-24 重庆科技学院 Modified is bubbled sulfuric acid standard humidity generator and its variable data accurate calculation method
CN113532361A (en) * 2021-06-21 2021-10-22 上海电机学院 Coal slurry depth and liquid level height detection device and method for water suction well of coal mine pump room
CN114459282A (en) * 2022-02-14 2022-05-10 东莞市山普斯科技有限公司 Automatic water gun
CN114459282B (en) * 2022-02-14 2024-02-20 东莞市山普斯科技有限公司 Automatic water gun
CN115206071A (en) * 2022-07-27 2022-10-18 招商局重庆交通科研设计院有限公司 Tunnel sand sediment well height monitoring system
CN115206071B (en) * 2022-07-27 2023-11-07 招商局重庆交通科研设计院有限公司 Tunnel sand-settling well height monitoring system
CN116294172A (en) * 2023-05-15 2023-06-23 中科长洋(山东)科技有限公司 Air conditioner with condensate water upper drainage module
CN116294172B (en) * 2023-05-15 2023-08-15 中科长洋(山东)科技有限公司 Air conditioner with condensate water upper drainage module

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Address after: 030006 8th Floor, Gaoke Building, No. 32 Gaoxin Street, Gaoxin District, Taiyuan City, Shanxi Province

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