CN204344152U - A kind of down-hole dead face ventilation system - Google Patents
A kind of down-hole dead face ventilation system Download PDFInfo
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- CN204344152U CN204344152U CN201420729515.0U CN201420729515U CN204344152U CN 204344152 U CN204344152 U CN 204344152U CN 201420729515 U CN201420729515 U CN 201420729515U CN 204344152 U CN204344152 U CN 204344152U
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- air duct
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Abstract
A kind of down-hole dead face ventilation system.The utility model relates to a kind of ventilation system, particularly a kind of down-hole dead face ventilation system.The secondary fan of native system is arranged in crosscut, import and export the work plane scope being located at dead face by drainage air duct for one of secondary fan, another import and export by threeway connect respectively crosscut split shed facing the wind to branch's cylinder and opening against branch's cylinder of wind direction, air channel conversion valve plate to the cylinder opening and closing of two branches is housed in threeway position, the rear end of drainage air duct is provided with smoke gas sensor, dead face also arranges smoke gas sensor near drainage air duct front end, and smoke gas sensor is connected with fan control module by data wire.The utility model solves the inefficient state of the distinguished and admirable relative equilibrium of legacy system flue dust, allow near the outside diffusion motion of flue dust of meeting head on to locate within the scope of the effective absorption distance or effective range of air duct, effectively to improve the efficiency getting rid of Blasting dust in the work of dead face excavation operation.
Description
Technical field
The utility model relates to a kind of ventilation system, particularly a kind of down-hole dead face ventilation system, this technology with comprise in ore underground mining and other underground engineering construction, dead face driving or confined space excavating work face ventilation except Blasting dust technique be correlated with.
Background technology
When ore underground mining and other underground engineering construction, only excavation operation is common work, at present in most of the cases, explosive blasting means are all adopted to break rock, consequent Blasting dust and the toxic and harmful such as carbon monoxide, nitrogen oxide need be discharged work plane as early as possible by ventilating and replace fresh distinguished and admirable, think the air ambient condition that subsequent job provides good.
So far, the means of ventilation of dead face driving face is still mainly undertaken forced by secondary fan, pull-out type or combination of forced and exhaust ventilation, its ventilation installation is primarily of secondary fan and drainage air duct composition, secondary fan is installed on the position away from dead face work plane usually, and by drainage air duct by fresh distinguished and admirable press-in work plane or foul atmosphere is detached work plane, for driving away the dirty wind near work plane efficiently, replace fresh distinguished and admirable, drainage air duct front port should as far as possible close to boring head, but extremely difficulty avoids blasting impact to involve the safety issue of the ventilation equipment that slungshot etc. brings thus, and, owing to producing volume of smoke and toxic and harmful and environment On The Problems of Visibility after the bursting work in P. drechsleri, operating personnel can not before ventilation smoke exhaust, enter work plane and move air duct front end in boring head, thus cause air duct front end must carry out the operation of ventilation flue dust at the home away from boring head.
The local ventilation facility be made up of traditional secondary fan and drainage air duct, its distinguished and admirable forced effective range or limited (usual 10 m of pull-out type effective absorption distance
2following middle-size and small-size drift section, distinguished and admirable effective range is 16 m, effective absorption distance is 5 m), in practice of construction, the casting distance of the slungshot that bursting work produces generally all is greater than 20 m, also produce powerful shock wave during down-hole confined space explosion simultaneously, when air duct is placed in apart from the place within the scope of operation 20 m, easily air duct is produced and destroy.Therefore, destroyed to prevent the air duct when bursting work, air duct is generally installed in apart from the place beyond the tunnelling scope of operation 20 m, air duct and the distance of meeting head on are considerably beyond its effective range or inhale journey, ventilation flue dust efficiency is caused to reduce thus, energy consumption increases, and tunnelling cycle period extends.
Under conventional draft type, namely blower fan is opened until smoke evacuation terminates the constant draft of just closing certainly, ventilate in the first few minutes of beginning, due to blast action, dust concentration and the temperature of work plane are higher, in addition the percussion of Blasting shock wave, flue dust and the distance between the air duct leading section of holding of meeting head on comparatively the later stage near, fume amount within the scope of air duct effective absorption distance or effective range is more, it is no matter now pull-out type or forced, the dirty air quantity of discharging in the blower fan unit interval is higher, the efficiency of blower fan is also higher, but in the ventilation middle and later periods, for forced ventilation, although its distinguished and admirable effective range is larger, but the dirty wind near the place of meeting head on can be suppressed and forms eddy current and not easily discharge fast, and the dirty wind of discharging also can be full of whole dead face during whole ventilation, especially in long blind heading situation, cycle time for working can be caused to increase, and exhaust ventilation, distinguished and admirable effective absorption distance is less, and easily forms fresh Air escape branch, and drafting efficiency is lower.Due to the more difficult outside migration of smog in the vortex disturbance district formed near the district that meets head on, cause flue dust in effective district less, and what be effectively pulled away in district is distinguished and admirable containing a large amount of fresh air, form a kind of flue dust in the inefficient state (comprising vorticity) near district's geo-stationary balance of meeting head on.In order to improve fan efficiency, dirty wind facies to be made in ventilation process as far as possible within the scope of the effective absorption distance migrating to air duct or effective range, for this reason, have and utilize Electromechanical Control mode, by the trial that air duct moves forward to meeting head on after explosion, but its safety and reliability remains in larger problem.In addition, for improving ventilation smoke exhaust intensity, cycle time for working is reduced, usual employing pressure, take out compound ventilation, but equipment and maintenance cost then can be caused thus to increase the raising of energy consumption, and equally in the ventilation middle and later periods, there is flue dust near district's geo-stationary balance of meeting head on, be difficult to the problem of discharging.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of ventilation system, at guarantee ventilation equipment and driving face safe distance under prerequisite, in the middle and later periods of ventilation flue dust, break the inefficient state of aforesaid relative equilibrium, allow near the outside diffusion motion of flue dust of meeting head on to locate within the scope of the effective absorption distance or effective range of air duct, effectively to improve the efficiency getting rid of Blasting dust in the work of dead face excavation operation.
The technical scheme that the utility model adopts is: secondary fan is arranged in crosscut, import and export the work plane scope being located at dead face by drainage air duct for one of secondary fan, another import and export by threeway connect respectively crosscut split shed facing the wind to branch's cylinder and opening against branch's cylinder of wind direction, air channel conversion valve plate to the cylinder opening and closing of two branches is housed in threeway position, the rear end of drainage air duct is provided with smoke gas sensor, dead face also arranges smoke gas sensor near drainage air duct front end, smoke gas sensor is connected with fan control module by data wire.
Opening facing the wind to branch's cylinder nozzle be arranged on the weather of crosscut, by curved cylinder is placed in top, crosscut, and stride across dead face, opening is arranged on the leeward of crosscut against branch's cylinder of wind direction; Smoke gas sensor in dead face is installed on tunnel sidewall and is highly greater than the half of dead face height, and the axial distance that distance drainage air duct is imported and exported is 1 ~ 2 meter.
In dead face, smoke gas sensor is other is also equipped with the air velocity transducer be connected with fan control module, and air channel conversion valve plate is configured with valve plate driver element, and valve plate driver element is also connected with fan control module.
Secondary fan is axial fan and is configured with the program-control frequency converting device of band communication interface, and frequency converter is connected with fan control module by data wire; The each several part air duct be connected with the import and export of secondary fan all adopts the air duct being with radial rigidity ring.
The course of work of native system is divided into following two stages.
1, ventilation early stage after bursting work, when the monitoring programme of microprocessor detect fan control module detects that dust concentration obviously increases according to the smoke gas sensor being arranged at dead face suitable position, by Frequency Converter Control, secondary fan starts, first exhaust ventilation (blade rotates by predetermined direction) is carried out, the flue dust of pump drainage near drainage air duct is imported and exported (comprising because the initial stage after firm explosion exceedes the flue dust of air duct drainage air duct import and export to dead face external diffusion to certain distance), in the process, when being arranged at the smoke gas sensor in drainage air duct and detecting that dust concentration obviously reduces, there is larger fresh Air escape branch in prompting, and near the dirty wind of meeting head on, relative equilibrium is static, plenum ventilation pattern should be started, now monitoring programme is reversed by Frequency Converter Control secondary fan, unlatching press mode ventilates, because forced ventilation operating distance is larger, ventilating air can break balance in early stage, the flue dust pressure of farther place will be imported and exported near the import and export of drainage air duct apart from drainage air duct, and exceed the import and export of drainage air duct to dead face diffusion certain distance, in the process, when the smoke gas sensor being arranged at dead face detects that dust concentration obviously increases again, prompting should open exhaust ventilation pattern again, whole dead face is full of to avoid flue dust, now monitoring programme is reversed by Frequency Converter Control secondary fan again, start extraction mode to ventilate, circulation like this, until when two smoke gas sensors in drainage air duct and in dead face all can not detect flue dust in setting-up time, prompting press-in and exhaust ventilation mode all make flue dust be moved into the relative equilibrium inactive state phase, it is more than the first stage.
2, system enters near the flue dust of meeting head on free to external diffusion, and---pressure---pump drainage---is near the free circulation mode to external diffusion of the flue dust of meeting head on.
Under this pattern, first monitoring programme suspends running by Frequency Converter Control secondary fan, allow near the flue dust of meeting head on freely to external diffusion, during this period, monitoring programme entry time controls, wait for when the flue dust of meeting head on part is diffused into the effective range distance of forced ventilation (wait sets according to theory calculate or experience diffusion time in advance), monitoring programme starts plenum ventilation mode by Frequency Converter Control secondary fan, when the smoke gas sensor in dead face detects that dust concentration raises, notification portion flue dust is by near pressure to drainage air duct import and export, monitoring programme is reversed by Frequency Converter Control secondary fan, carry out pump drainage ventilation again, when being arranged at the smoke gas sensor in drainage air duct and detecting that dust concentration obviously reduces, monitoring programme is reversed by Frequency Converter Control secondary fan again, carry out pressure ventilation, circulation like this, until when two smoke gas sensors in drainage air duct and in dead face all can only detect minimum dust concentration, prompting press-in and exhaust ventilation mode all make flue dust move and again enter the relative equilibrium inactive state phase, monitoring programme suspends running by Frequency Converter Control secondary fan again, closely meet head on flue dust freely to external diffusion circulation like this, until within the time of setting in advance, no longer flue dust can be detected, flue dust is then pointed out to get rid of completely, system closing, stop ventilating.
" setting-up time " of above-mentioned what is called " until when two smoke gas sensors in drainage air duct and in dead face all can not detect flue dust in setting-up time ", be that the wind speed parameter that the air velocity transducer detected according to microprocessor detect fan control module provides judges that flue dust should arrive the time t of smoke gas sensor, namely with the wind speed parameter v that the smoke gas sensor mounting points in dead face provides to the distance s that dead face is met head on divided by air velocity transducer, be also t=s/v; The time out of secondary fan's operation suspension depends on flue dust diffusion velocity, according to the size of dead face section, with the difference of environment temperature, usually desirable 30 seconds to 120 seconds, section is large, temperature height time, desirable smaller value, otherwise desirable higher value, and be limited to the upper limit according to the increase of cycle-index from down and progressively increase progressively, its increment can be counted for 10 seconds to 30 seconds.
Consider that press-in and exhaust ventilation hocket, the air intake of Ye Ji secondary fan and outlet air end are checkers, and dirty wind is got rid of direction and need be adapted with the wind direction in crosscut, the technical solution of the utility model also comprises: be provided with Liang Ge branch air duct in the outer end of secondary fan, wherein by curved cylinder being placed in branch's air duct at top, crosscut for air intake during press mode, another branch's air duct is for extracting air-out during mode out, and air channel conversion valve plate and the drive unit of band revolute pair are installed in the junction of two branch's air ducts, in order to change air channel, wherein drive unit can adopt motor or electromagnetism transfer bar mechanism, and air channel conversion and control and plenum ventilation and exhaust ventilation mode conversion match.
The beneficial effects of the utility model are: the face-airing of digging at dead face driving or the confined space is got rid of in Blasting dust work, fed back by sensor detection signal, microcomputor program controls frequency converter operation sheet desk fan blower fan and realizes press-in-extraction--closely meet head on flue dust freely to the ventilation smoke exhaust function of external diffusion, can more traditional press-in, extraction and the combination of forced and exhaust ventilation time short, efficiency is high, shorten cycle time for working, and there is obvious energy-saving effect.
Accompanying drawing explanation
Fig. 1 is system layout schematic diagram of the present utility model;
Fig. 2 is air channel of the present utility model conversion portion schematic diagram;
Fig. 3 is monitoring system block diagram of the present utility model signal.
In figure, each label is followed successively by: secondary fan 1, frequency converter 2, branch's cylinder 3, branch's cylinder 4, curved cylinder 5, drainage air duct 6, smoke gas sensor 7, smoke gas sensor 8, air velocity transducer 9, dead face 10, crosscut 11, air channel conversion valve plate 12, fan control module 13, wind direction 14, valve plate revolute pair 15, valve plate driver element 16, threeway 17.
Detailed description of the invention
See Fig. 1, Fig. 2 and Fig. 3.Native system comprises ventilation equipment and detection control facility.
Described ventilation equipment comprises: in the outer side crosscut 11 of dead face 10 mouthfuls, secondary fan 1 is set, one end of secondary fan 1 is connected with branch's air duct 3 and branch's air duct 4, wherein branch's air duct 4 is by curved cylinder 5 is placed in top, crosscut 11, and stride across dead face 10 and extend to air intake direction, distinguished and admirable upstream, branch's air duct 3 outlet is positioned at return air direction, distinguished and admirable downstream, threeway 17 place of two branches air duct handing-over is provided with air channel conversion valve plate 12 and valve plate revolute pair 15 thereof, and valve plate revolute pair 15 is configured with the valve plate driver element 16 be connected with fan control module 13; The other end of secondary fan 1 imports and exports the drainage air duct 6 connected near straight-through dead face 10 work plane;
Described detection control facility comprises the smoke gas sensor 7 be arranged in dead face 10, the smoke gas sensor 8 be arranged in drainage air duct 6, the air velocity transducer 9 be arranged in dead face, be arranged at the other frequency converter 2 of secondary fan 1 and fan control module 13 and driver part, each component of detection control facility are connected by data wire.
Branch's air duct 3 that the turnover external port of secondary fan 1 is arranged is all identical with the barrel dliameter of drainage air duct 6 in front port dead face 10 with the Liang Ge branch cylinder diameter of 4, consider crosscut 11 wind direction, the outlet of the air-out branch cylinder 3 during exhaust ventilation should be positioned at leeward, the same side relative to dead face 10, crosscut 11 can be placed in secondary fan 1 during actual installation, and the air intake of air intake branch cylinder 4 during forced ventilation should be positioned at weather, top, crosscut 11 is turned to by curved cylinder 5 during actual installation, and stride across dead face 10 and be placed in the opposite side of crosscut 11 relative to dead face 10, air channel conversion valve plate 12 is equipped with in the position of the threeway 17 of two branch's air duct 3 and 4 junctions, wind direction conversion is changed valve plate 12 by air channel and is adopted valve plate revolute pair 15, and to be controlled by the fan control module 13 of microprocessor detect, promote to realize by the conventional valve plate driver element 16 of motor or electromagnetism transfer bar mechanism composition, the material of air channel conversion valve plate 12 can be metal or rigid plastics.
Smoke gas sensor 8 in drainage air duct 6 to be installed in dead face 10 in drainage air duct 6 close to place of secondary fan 1, can be fixed on drainage air duct 6 inwall; Smoke gas sensor 7 in dead face 10 and air velocity transducer 9 can be installed in dead face 10 outside drainage air duct 6, in tunnel axis direction, import and export the tunnel side-walls of 1 ~ 2 meter apart from drainage air duct 6, and height should higher than 1/2 of dead face 10 height.
The program-control frequency converting device of band communication interface selected by frequency converter 2, and secondary fan 1 is axial-flow type, and each several part air duct should adopt the air duct of band radial rigidity ring, and to prevent radial deformation, the mounting means of secondary fan 1 and each air duct all can adopt traditional approach.
Smoke gas sensor 7,8 and air velocity transducer 9 all can adopt the existing conventional respective sensor of band data communication port, and are connected to the fan control module 13 of microprocessor detect.
If desired Multi-working-surface or Long-distance Control in addition, can adopt desk-top or notebook type microcomputer (comprising Industrial Personal Computer (IPC)) as main control unit, and is aided with classical signal remote-transmission module and realizes.
Claims (4)
1. a down-hole dead face ventilation system, it is characterized in that: secondary fan is arranged in crosscut, import and export the work plane scope being located at dead face by drainage air duct for one of secondary fan, another import and export by threeway connect respectively crosscut split shed facing the wind to branch's cylinder and opening against branch's cylinder of wind direction, air channel conversion valve plate to the cylinder opening and closing of two branches is housed in threeway position, the rear end of drainage air duct is provided with smoke gas sensor, dead face also arranges smoke gas sensor near drainage air duct front end, smoke gas sensor is connected with fan control module by data wire.
2. by down-hole according to claim 1 dead face ventilation system, it is characterized in that: opening facing the wind to branch's cylinder nozzle be arranged on the weather of crosscut, by curved cylinder is placed in top, crosscut, and stride across dead face, opening is arranged on the leeward of crosscut against branch's cylinder of wind direction; Smoke gas sensor in dead face is installed on tunnel sidewall and is highly greater than the half of dead face height, and the axial distance that distance drainage air duct is imported and exported is 1 ~ 2 meter.
3. by down-hole according to claim 2 dead face ventilation system, it is characterized in that: in dead face, smoke gas sensor is other is also equipped with the air velocity transducer be connected with fan control module, air channel conversion valve plate is configured with valve plate driver element, and valve plate driver element is also connected with fan control module.
4. by down-hole according to claim 2 dead face ventilation system, it is characterized in that: secondary fan is axial fan and is configured with the program-control frequency converting device of band communication interface, and frequency converter is connected with fan control module by data wire; The each several part air duct be connected with the import and export of secondary fan all adopts the air duct being with radial rigidity ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729515.0U CN204344152U (en) | 2014-11-29 | 2014-11-29 | A kind of down-hole dead face ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729515.0U CN204344152U (en) | 2014-11-29 | 2014-11-29 | A kind of down-hole dead face ventilation system |
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| Publication Number | Publication Date |
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| CN204344152U true CN204344152U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420729515.0U Withdrawn - After Issue CN204344152U (en) | 2014-11-29 | 2014-11-29 | A kind of down-hole dead face ventilation system |
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| CN (1) | CN204344152U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481570A (en) * | 2014-11-29 | 2015-04-01 | 彝良驰宏矿业有限公司 | Underground blind tunnel ventilation system |
| CN110145355A (en) * | 2019-06-14 | 2019-08-20 | 华北理工大学 | A kind of rubber conveyer fire smoke flow drainage device and method |
-
2014
- 2014-11-29 CN CN201420729515.0U patent/CN204344152U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481570A (en) * | 2014-11-29 | 2015-04-01 | 彝良驰宏矿业有限公司 | Underground blind tunnel ventilation system |
| CN104481570B (en) * | 2014-11-29 | 2016-09-14 | 彝良驰宏矿业有限公司 | A kind of down-hole dead face ventilating system |
| CN110145355A (en) * | 2019-06-14 | 2019-08-20 | 华北理工大学 | A kind of rubber conveyer fire smoke flow drainage device and method |
| CN110145355B (en) * | 2019-06-14 | 2024-05-17 | 华北理工大学 | Fire smoke flow drainage device and method for belt conveyor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |