CN110847944B - Ventilation adjusting device for underground works - Google Patents

Ventilation adjusting device for underground works Download PDF

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Publication number
CN110847944B
CN110847944B CN201911134598.2A CN201911134598A CN110847944B CN 110847944 B CN110847944 B CN 110847944B CN 201911134598 A CN201911134598 A CN 201911134598A CN 110847944 B CN110847944 B CN 110847944B
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fixed
box
wall
dust
rotating
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CN110847944A (en
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车志敏
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Ganzhou BAOYING Construction Engineering Co.,Ltd.
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Ganzhou Baoying Construction Engineering Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/04—Air ducts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/20—Drawing-off or depositing dust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Cleaning In General (AREA)

Abstract

The invention discloses a ventilation adjusting device for underground engineering, which comprises a ventilation pipe, wherein a fan for sucking air is arranged in the ventilation pipe, a support box is fixed at the bottom of the ventilation pipe, a driving box is welded at the upper end of the support box, the side wall of the driving box is connected with a rotating core in a penetrating and rotating mode, a plurality of rotating blades are fixed on the circumferential side wall of the rotating core, dust-absorbing cotton is fixed on the side wall of each rotating blade, a timing detection mechanism is arranged in the support box, and a cleaning box is fixed on the inner wall of the ventilation pipe. Has the advantages that: when the dust is more, contact the electric piece and will make the adjusting electromagnet connecting circuit after contacting with the adjusting electromagnet that electric current is great, adjust the electromagnet promptly and can produce great magnetic field and then attract to contact the electroplax by sufficient magnetic force and remove and contact the contact of electric plate, and then realize the acceleration rate adjustment of fan for the fan can be faster with the dust clearance in the underground tunnel, guarantees the cleanness of air in the underground tunnel.

Description

Ventilation adjusting device for underground works
Technical Field
The invention relates to the technical field of underground engineering, in particular to a ventilation adjusting device for underground engineering.
Background
The underground engineering is underground civil engineering which is built for developing and utilizing underground space resources and is deep under the ground, and comprises underground houses, underground structures, underground railways, highway tunnels, underwater tunnels, underground common ditches and street-crossing underground passages.
Underground works is in the work progress, need carry out effectual ventilation in to the underpass, guarantee underground construction environment's safety, because the work progress can produce pollutants such as dust, the mode that adopts the suction mostly ventilates, but current ventilation unit has certain defect on the regulation to the speed of ventilating, can not adjust according to the dust volume in the construction environment, make the dust that produces unable in time discharge when more, cause the worsening of underground environment, lead to the fact the threat to constructor's safety.
Disclosure of Invention
The invention aims to solve the problem of poor ventilation regulating capability in the underground engineering construction process in the prior art, and provides a ventilation regulating device for underground engineering.
In order to achieve the purpose, the invention adopts the following technical scheme: a ventilation adjusting device for underground engineering comprises a ventilation pipe, wherein a fan used for sucking air is arranged inside the ventilation pipe, a support box is fixed at the bottom of the ventilation pipe, a driving box is welded at the upper end of the support box, the side wall of the driving box is connected with a rotating core in a penetrating and rotating mode, a plurality of rotating blades are fixed on the circumferential side wall of the rotating core, dust-absorbing cotton is fixed on the side wall of each rotating blade, a timing detection mechanism is arranged inside the support box, a cleaning box is fixed on the inner wall of the ventilation pipe, a cleaning groove is formed in the side wall of the cleaning box, a dust-proof plate is connected on the inner wall of one side, far away from the support box, of the cleaning groove through a torsional spring in a rotating mode, the rotating blades at the lower end of the rotating core penetrate through the cleaning groove and extend into the cleaning box, brushes which are abutted against the rotating blades are fixed on the inner wall of the cleaning box and the side wall of the dust-proof, and a trigger mechanism for adjusting the rotating speed of the fan is arranged at the bottom of the cleaning box.
In foretell ventilation regulating apparatus for underground works, timing detection mechanism includes master gear, drive gear and trigger gear, the master gear is located the inside one end fixed connection of drive case with changeing the core, drive gear and trigger gear all pass through the bearing with the inner wall that supports the case and rotate and be connected and intermeshing, drive gear runs through the bottom and the master gear mesh of drive case, the one end that supports the case and keeps away from the cleaning case is run through and has been seted up the rotary trough, the upper end inner wall in rotary trough is fixed with opens and close the piece, the lower extreme inner wall in rotary trough is fixed with the detection piece, the one end that trigger gear is close to the rotary trough is fixed with and opens and close the piece balanced block that connects the electricity.
In foretell ventilation adjusting device for underground works, trigger mechanism is including fixing the photo resistance on the cleaning box inner wall, the inner wall of cleaning box is fixed with the regulation electro-magnet, the lateral wall of adjusting the electro-magnet is fixed with the electric lug, the inner wall of cleaning box is fixed with connects the electric spring, it is fixed with the electric plate to connect the electric spring to be close to the one end of connecting the electric lug.
Compared with the prior art, the invention has the advantages that:
1. according to the dust collecting device, the rotating blade is driven to rotate by air draft of the fan, and the dust collected by the dust collecting cotton on the surface of the rotating blade is intercepted, so that the dust falls into the cleaning box under the scraping action of the brush, the dust is collected and detected, and the rotating blade is not required to be driven to rotate by extra power, so that energy is fully utilized;
2. in the invention, the main gear, the transmission gear and the trigger gear are in speed reduction transmission, so that the rotating blade can rotate for multiple circles to realize effective dust accumulation in the process that the electric block is separated from the opening and closing block to be in contact with the detection block, and the effectiveness of dust amount detection is ensured;
3. according to the invention, the resistance value of the photoresistor is inversely proportional to the accumulated dust amount, when the dust is more, the current in the adjusting electromagnet connecting circuit is larger after the contact block is contacted with the adjusting electromagnet, namely the adjusting electromagnet can generate a larger magnetic field to attract the contact plate to move by enough magnetic force to be contacted with the contact piece, so that the speed-up adjustment of the fan is realized, the fan can quickly clean the dust in the underground tunnel, and the cleanness of the air in the underground tunnel is ensured;
4, when the power connection block is just contacted with the detection block, if the accumulated dust amount is less, the fan keeps far-speed air draft, the dust amount is continuously accumulated along with the increase of the contact time of the power connection block and the detection block, if the dust amount meets the requirement of speed increase in the contact process, the speed-increasing air draft is carried out, but the time of the speed-increasing air draft is correspondingly reduced, so that the time of the speed-increasing air draft and the dust accumulation speed form dynamic matching, the invalid output of the fan can be further avoided, and the utilization rate of energy is improved;
5 in the invention, after the power connection block is contacted with the opening and closing block, the opening and closing electromagnet is electrified and started, the dustproof plate deflects to open the cleaning groove, so that dust in the cleaning box is removed at one time under the action of wind power, the power connection block is separated from the opening and closing block to carry out next accumulation detection, and the detection timeliness is ensured.
Drawings
Fig. 1 is a schematic structural view of a ventilation regulating apparatus for underground works according to the present invention;
fig. 2 is a side sectional view of a ventilation adjusting apparatus for underground works according to the present invention;
fig. 3 is a side view of a support box portion of a ventilation adjusting apparatus for underground works according to the present invention;
fig. 4 is an enlarged schematic view of a cleaning tank portion of a ventilation regulating apparatus for underground works according to the present invention.
In the figure: the device comprises a ventilation pipe 1, a fan 2, a support box 3, a drive box 4, a rotary core 5, a rotary blade 6, a dust-absorbing cotton 7, a main gear 8, a transmission gear 9, a trigger gear 10, a cleaning box 11, a cleaning groove 12, a dust guard 13, a hairbrush 14, an electromagnet 15 for opening and closing, a rotary groove 16, an opening and closing block 17, a detection block 18, an electricity connection block 19, a photoresistor 20, an adjusting electromagnet 21, an electricity connection piece 22, an electricity connection spring 23 and an electricity connection plate 24.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1-3, a ventilation adjusting device for underground engineering comprises a ventilation pipe 1, a fan 2 for sucking air is arranged inside the ventilation pipe 1, a support box 3 is fixed at the bottom of the ventilation pipe 1, a driving box 4 is welded at the upper end of the support box 3, the side wall of the driving box 4 is connected with a rotating core 5 in a penetrating and rotating manner, a plurality of rotating blades 6 are fixed on the circumferential side wall of the rotating core 5, dust-absorbing cotton 7 is fixed on the side wall of each rotating blade 6, the dust-absorbing cotton 7 is a cotton board with a protruded surface, a timing detection mechanism is arranged inside the support box 3, a cleaning box 11 is fixed on the inner wall of the ventilation pipe 1, a cleaning groove 12 is arranged on the side wall of the cleaning box 11, a dust-proof board 13 is connected on the inner wall of one side of the support box 3 in a rotating manner through a torsion spring, the rotating blade 6 at the lower end of the rotating core 5 extends into the cleaning box 11 through the cleaning groove 12, brushes 14 which are abutted against the rotating blades 6 are fixed on, an opening and closing electromagnet 15 is fixed on the inner wall of the cleaning box 11, a permanent magnet is fixed on the surface of the dust-proof plate 13, the permanent magnet and a magnetic field generated after the opening and closing electromagnet 15 is electrified repel each other, namely the magnetic field generated by the opening and closing electromagnet 15 pushes the dust-proof plate 13 to rotate towards the outside of the cleaning box 11, and a trigger mechanism used for adjusting the rotating speed of the fan 2 is arranged at the bottom of the cleaning box 11.
The timing detection mechanism comprises a main gear 8, a transmission gear 9 and a trigger gear 10, the main gear 8 and one end of a rotary core 5, which is located inside a driving box 4, are fixedly connected, the transmission gear 9 and the trigger gear 10 are both rotationally connected and meshed with the inner wall of a supporting box 3 through bearings, the transmission gear 9 penetrates through the bottom of the driving box 4 and is meshed with the main gear 8, a rotary groove 16 is formed in one end, which is far away from a cleaning box 11, of the supporting box 3 in a penetrating mode, an opening and closing block 17 is fixed on the inner wall of the upper end of the rotary groove 16, a detection block 18 is fixed on the inner wall of the lower end of the rotary groove 16, the detection block 18 is a semicircular block, the upper end of the detection block 18 is in contact with the opening and closing block 17 and is insulated from each other, and an electricity connection block.
The trigger mechanism comprises a photosensitive resistor 20 fixed on the inner wall of the cleaning box 11, an adjusting electromagnet 21 is fixed on the inner wall of the cleaning box 11, a power connection piece 22 is fixed on the side wall of the adjusting electromagnet 21, a power connection spring 23 is fixed on the inner wall of the cleaning box 11, a power connection plate 24 is fixed at one end, close to the power connection piece 22, of the power connection spring 23, when the power connection piece 19 is in contact with the opening and closing piece 17, the power connection piece 19 and the opening and closing electromagnet 15 form a closed loop with an external power supply through connection of wires, when the power connection piece 19 is in contact with the detection piece 18, the power connection piece 19, the photosensitive resistor 20 and the adjusting electromagnet 21 form a closed loop with the external power supply, the resistance value of the photosensitive resistor 20 is increased along with the increase of the illumination intensity, the light intensity on the photosensitive resistor 20 is reduced and the resistance value is reduced after dust covers, the electric connecting piece 22 and the electric connecting plate 24 form a passage with a rotating speed regulating circuit of the fan 2, so that the rotating speed of the fan 2 is increased.
In the invention, when the fan 2 is normally operated to suck and ventilate the underground tunnel, dust in the underground tunnel can be sucked and carried at the same time, so that air purification of the underground tunnel is realized, the continuous deterioration of the construction environment of the underground tunnel is avoided, when the fan 2 sucks air, the air blows the rotating blade 6 to rotate when being discharged through the vent pipe 1, and when the air rapidly passes through the rotating blade 6, dust mixed in the air is intercepted and captured by the rotating blade 6 and then adsorbed on the dust absorption cotton 7 on the surface of the rotating blade 6, and along with the rotation of the rotating blade 6, the dust absorption cotton 7 is continuously contacted with the hairbrush 14, so that the captured dust is cleaned by the hairbrush 14 and falls into the cleaning box 11, and then falls on the surface of the photosensitive resistor 20, and the resistance value of the photosensitive resistor 20 is influenced;
when the rotating blade 6 rotates, the rotating core 5 drives the main gear 8 to synchronously rotate, so that the main gear 8 drives the transmission gear 9 meshed with the main gear to rotate, and further the trigger gear 10 rotates, because the transmission from the main gear 8 to the trigger gear 10 is a speed reduction transmission, the main gear 8 rotates a plurality of times of trigger gears 10 to rotate for one circle, in the rotation process of the trigger gear 10, the contact electric block 19 on the trigger gear is in contact with the opening and closing block 17 and the detection block 18 in a reciprocating manner, after the contact of the contact electric block 19 and the opening and closing block 17, the opening and closing electromagnet 15 is electrified to generate a larger magnetic field, so that the dustproof plate 13 is pushed to rotate towards one side far away from the supporting box 3, one end of the cleaning groove 12 facing the fan 2 is completely opened, and then dust in the cleaning box 11 is completely cleaned under the action of wind power;
in the process that the power connection block 19 is separated from the opening and closing block 17 to be in contact with the detection block 18, the opening and closing electromagnet 15 is powered off and does not generate a magnetic field, the dustproof plate 13 is reset under the action of the elastic force of the torsion spring, dust falling from the dust absorption cotton 7 is collected in the cleaning box 11, the dust is enabled to continuously cover the surface of the photosensitive resistor 20, the resistance value of the photosensitive resistor 20 is enabled to be reduced continuously, after the power connection block 19 is in contact with the detection block 18, the photosensitive resistor 20 and the adjustment electromagnet 21 are powered on simultaneously, in this state, if the dust on the surface of the photosensitive resistor 20 is less, the resistance value of the photosensitive resistor 20 is larger, the passage current of the adjustment electromagnet 21 is smaller, the generated magnetic field is weaker in adsorption force on the electric contact plate 24, the electric contact plate 24 cannot be stretched to contact the electric spring 23 with the electric contact piece 22 under the action of magnetic force, the rotating speed of the fan, namely, when less dust is extracted in unit time, the fan 2 keeps working at the original rotating speed; if the amount of dust on the surface of the photoresistor 20 is large, the resistance value of the photoresistor 20 is small, so that the access current of the adjusting electromagnet 21 is large, the adjusting electromagnet 21 generates enough magnetic field force, the electric connection plate 24 is in contact with the electric connection piece 22, the rotating speed adjusting circuit of the fan 2 is switched on, the rotating speed of the fan 2 is increased, the air draft amount in unit time is increased, the function of quickly exhausting air and cleaning dust is realized, the treatment of the dust in an underground tunnel is accelerated, and the construction safety is ensured;
after the power connection block 19 is separated from the detection block 18 and contacts with the opening and closing block 17, dust in the cleaning box 11 is cleaned, and then the next round of dust accumulation detection is carried out, so that unnecessary energy consumption caused by long-term high-rotation-speed state of the fan 2 is avoided, meanwhile, the dust in the underground tunnel is cleaned to a certain extent in the high-rotation-speed air draft process of the fan 2, the dust amount is reduced in time, and whether accelerated extraction and cleaning are needed to be carried out or not needs to be detected again; in the process of contacting the power connection block 19 and the detection block 18, if the speed-increasing requirement is not met just when the power connection block is contacted, the speed-increasing requirement is met along with the further accumulation of dust in the contact process, the speed-increasing air draft of the fan 2 can be triggered, but the contact time between the power connection block 19 and the detection block 18 is short, namely the time of the speed-increasing air draft is reduced correspondingly, so that the dynamic corresponding relation is formed between the high-speed air draft time and the amount of dust, the energy is reasonably utilized, the part of time from the disconnection of the power connection block 19 from the opening and closing block 17 to the contact with the detection block 18 is the basic dust accumulation detection time, a circuit which is not connected with the photosensitive resistor 20 can reduce the heating loss of the photosensitive resistor 20, the service life of the photosensitive resistor 20 is prolonged, and the energy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (3)

1. The ventilation adjusting device for the underground engineering comprises a ventilation pipe (1), wherein a fan (2) used for sucking air is arranged inside the ventilation pipe (1), and the ventilation adjusting device is characterized in that a supporting box (3) is fixed at the bottom of the ventilation pipe (1), a driving box (4) is welded at the upper end of the supporting box (3), a rotating core (5) is connected to the side wall of the driving box (4) in a penetrating and rotating mode, a plurality of rotating leaves (6) are fixed on the circumferential side wall of the rotating core (5), dust-absorbing cotton (7) is fixed on the side wall of each rotating leaf (6), a timing detection mechanism is arranged inside the supporting box (3), a cleaning box (11) is fixed on the inner wall of the ventilation pipe (1), a cleaning groove (12) is formed in the side wall of the cleaning box (11), a dust-proof plate (13) is connected to the inner wall of one side, far away from the supporting box (3), through the rotation of a torsion spring, of the, the rotary blade (6) at the lower end of the rotary core (5) penetrates through the cleaning groove (12) and extends to the inside of the cleaning box (11), the inner wall of the cleaning box (11) and the side wall of the dust guard (13) are both fixed with a brush (14) which is abutted against the rotary blade (6), the inner wall of the cleaning box (11) is fixed with an opening and closing electromagnet (15), and the bottom of the cleaning box (11) is provided with a trigger mechanism for adjusting the rotating speed of the fan (2).
2. A ventilation regulating device for underground works according to claim 1, the timing detection mechanism comprises a main gear (8), a transmission gear (9) and a trigger gear (10), the main gear (8) is fixedly connected with one end of the rotating core (5) positioned in the driving box (4), the transmission gear (9) and the trigger gear (10) are rotationally connected with the inner wall of the support box (3) through a bearing and are mutually meshed, the transmission gear (9) penetrates through the bottom of the driving box (4) and is meshed with the main gear (8), a rotary groove (16) is arranged at one end of the supporting box (3) far away from the cleaning box (11), an opening and closing block (17) is fixed on the inner wall of the upper end of the rotary groove (16), a detection block (18) is fixed on the inner wall of the lower end of the rotary groove (16), an electric block (19) which is abutted against the opening and closing block (17) is fixed at one end of the trigger gear (10) close to the rotary groove (16).
3. The ventilation adjusting device for the underground engineering, according to claim 1, characterized in that the triggering mechanism comprises a photoresistor (20) fixed on the inner wall of the cleaning box (11), the inner wall of the cleaning box (11) is fixed with an adjusting electromagnet (21), the side wall of the adjusting electromagnet (21) is fixed with an electric connecting piece (22), the inner wall of the cleaning box (11) is fixed with an electric connecting spring (23), and one end, close to the electric connecting piece (22), of the electric connecting spring (23) is fixed with an electric connecting plate (24).
CN201911134598.2A 2019-11-19 2019-11-19 Ventilation adjusting device for underground works Active CN110847944B (en)

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CN111810426B (en) * 2020-07-17 2021-10-01 江苏迈阳环保有限公司 High-efficient air feeder of gas boiler
CN113933241B (en) * 2021-09-16 2022-06-10 南京信息职业技术学院 Vision system calibration device and use method thereof

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