CN114705255B - Colliery mine air volume detection device - Google Patents
Colliery mine air volume detection device Download PDFInfo
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- CN114705255B CN114705255B CN202210629862.5A CN202210629862A CN114705255B CN 114705255 B CN114705255 B CN 114705255B CN 202210629862 A CN202210629862 A CN 202210629862A CN 114705255 B CN114705255 B CN 114705255B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/28—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
- G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention relates to a coal mine ventilation rate detection device, which belongs to the technical field of coal mine fully mechanized mining auxiliary devices and comprises a measuring wind wheel arranged in a ventilation roadway, wherein the axis directions of the measuring wind wheel and the ventilation roadway are consistent; the side wall of the ventilation roadway is provided with a bearing groove; the edge of the measuring wind wheel is positioned in the bearing groove; the bearing groove is internally provided with an installation position; the installation position is provided with a measuring rolling part. The invention can effectively enlarge the wind collecting surface, thereby enlarging the measuring range; and the measuring mode can be continuous for a long time, and the ventilation quantity in the mine can be detected in real time. Meanwhile, the interference of the external environment to the measurement is reduced, and the measurement precision is improved.
Description
Technical Field
The invention belongs to a ventilation quantity detection device, particularly relates to a coal mine ventilation quantity detection device, and belongs to the technical field of mine ventilation detection.
Background
The ventilation volume directly determines whether the air in the well can meet the requirements of personnel, dilute harmful gas and dust and ensure safe production. Therefore, the mine ventilation volume is important to detect, the following detection modes are generally adopted in the prior art, the first mode is a wind cup, the wind cup is converted into the wind speed by measuring the rotating speed of the wind cup, and finally the ventilation volume is obtained through a calculation formula, and the defects of the mode are as follows: firstly, dust is generated in a mine which is difficult to avoid, and due to the special structure of the wind cup, a large amount of dust is easy to accumulate behind the wind cup after long-term use, and the rotating speed of the wind cup is influenced, so that the ventilation quantity is measured inaccurately; secondly, the windward side of the wind cup is small, and the wind speed in a small range can be measured no matter in a roadway or a working surface, so that the measurement result is poor in representativeness; the second type of mode is a handheld wind pressure measuring instrument, which can only measure local wind pressure, and meanwhile, the biggest defect is that the continuity is poor and the instrument can only be used temporarily, but the time consumption of underground operation is long, the process of air volume reduction is difficult to sense, and if the continuous and real-time detection can not be carried out through a professional device, the safety can not be ensured.
Therefore, there is a need for further improvement.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a coal mine ventilation rate detection device which can improve the detection precision, realize real-time detection, has a wide detection coverage and effectively avoids the interference of environmental factors.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coal mine ventilation rate detection device comprises a measuring wind wheel arranged in a ventilation tunnel, wherein the axis directions of the measuring wind wheel and the ventilation tunnel are consistent; the side wall of the ventilation roadway is provided with a bearing groove; the edge of the measuring wind wheel is positioned in the bearing groove; the bearing groove is internally provided with an installation position; the mounting position is provided with a measuring rolling part; the measuring rolling part is contacted with the measuring wind wheel; a pressure detection mechanism is arranged in the mounting position; the measuring rolling part is connected with the pressure detection mechanism; the side part of the bearing groove is provided with an installation groove; a photoelectric sensing element is arranged in the mounting groove; the measuring wind wheel is provided with a light sensation part.
Preferably, the measuring wind wheel comprises a cylindrical main body; the outer side of the main body is provided with a bearing disc; the bearing disc is positioned in the bearing groove; the bearing grooves are formed in four inner side walls of the ventilation roadway or on two opposite side walls.
Preferably, the measuring wind wheel further comprises a plurality of fan blades arranged on the inner side of the main body; the fan blades are arranged along the tangential direction of the main body; the fan blades are uniformly arranged on the inner side wall of the main body around the axis of the measuring wind wheel; the circumferential surface of the bearing disc is provided with a roller; the roller is connected with the upper side wall of the bearing groove in a rolling way.
Preferably, the mounting position is arranged on the side wall of the bearing groove; the installation position is arranged on one side of the leeward side of the measuring wind wheel; the mounting position is provided with a cavity and a clamping groove; the width of the cavity is smaller than that of the bearing groove; the pressure detection mechanism is arranged in the cavity; the measuring rolling part comprises an inserted bar and a roller.
Preferably, the outer side of the inserted link is provided with a limiting bulge; a limiting groove is formed in the inner side wall of the clamping groove; a return spring is arranged in the limit groove; the limit bulge is connected with the return spring; the roller is arranged at the outer end of the inserted rod; the roller is contacted with the end surface of the bearing disc.
Preferably, the pressure detection mechanism comprises an arched elastic airtight piece; the pressure sensor is arranged on the side wall of the chamber; the elastic airtight piece is hermetically connected with the pressure sensor; a pressurizing cavity is formed between the elastic airtight piece and the pressure sensor; the pressurizing cavity is filled with liquid; the pressure sensor is connected with the signal processing terminal.
Preferably, one side of the bearing groove is provided with an installation groove; the width of the mounting groove is smaller than that of the bearing groove; the mounting groove is communicated with the bearing groove; the photoelectric sensing element comprises a light-emitting unit and a receiving unit which are arranged in the mounting groove; the photoelectric sensing element is connected with the signal processing terminal.
Preferably, the light sensation part comprises a light absorption layer and a light reflection layer which are coated on the end face of the bearing disc; the light absorption layer and the light reflection layer are uniformly distributed on one side of the bearing plate close to the mounting groove in a staggered mode.
Preferably, mounting grooves are formed in two sides of the bearing groove; the width of the mounting groove is smaller than that of the bearing groove; the mounting groove is communicated with the bearing groove; the photoelectric sensing element comprises a correlation type infrared transmitting unit and a correlation type infrared receiving unit which are respectively arranged in the two mounting grooves; the light sensation part comprises light through holes which are uniformly distributed on the bearing disc; the photoelectric sensing element is connected with the signal processing terminal.
The invention has the following beneficial effects:
1) the measuring wind wheel is positioned on the cross section of the ventilation roadway and is arranged coaxially with the ventilation roadway, and the measuring wind wheel can cover most of the cross section of the ventilation roadway. Compared with the prior art, the wind collecting surface can be enlarged, so that the measuring range is enlarged; the measuring wind wheel is annular, the blades are distributed on the inner side of the main body along a tangent angle, the wind resistance is small, and the influence on the wind speed is extremely small;
2) in the working process, the wind current drives the measuring wind wheel to rotate, the rotating speed of the measuring wind wheel can be measured under the matching of the light sensing part and the photoelectric sensing element, and the rotating speed is converted into the wind speed, so that the effect of calculating the ventilation quantity is achieved; the measurement mode can be continued for a long time, and the ventilation in the mine can be detected in real time;
3) compared with the prior art, the photoelectric sensing element is arranged in a closed environment (mounting groove), is not easily interfered by the outside, and ensures the measurement accuracy; moreover, sundries are not easy to remain in the shape of the fan blade, and the measurement of the rotating speed of the wind wheel is not easy to be influenced;
4) the real-time pressure borne by the wind wheel can be detected and measured according to the pressure detection mechanism, so that the wind pressure is obtained, and the real-time wind speed and the wind volume can be converted according to the wind pressure; through setting up pressure measurement mechanism, even photoelectric sensing element receives debris interference failure, also can calculate the amount of wind through the mode of wind pressure measurement and calculation, promotes the reliability.
5) The special design of the pressure detection mechanism does not directly detect the wind pressure, but detects the change of the wind pressure by detecting the pressure change in the pressurization cavity through the pressure sensor; because the pressure sensor is in a sealed environment, the pressure sensor can be prevented from being oxidized, and the measurement precision is improved.
Drawings
Fig. 1 is a schematic view of an assembly structure of the present invention.
Fig. 2 is a schematic structural diagram of a measuring wind wheel.
Fig. 3 is a schematic cross-sectional view illustrating a first embodiment of the present invention.
Fig. 4 is an enlarged view of part a.
Fig. 5 is a schematic view of a connection structure of the measurement rolling part and the mounting position.
Fig. 6 is a schematic cross-sectional view of the second embodiment.
Fig. 7 is a schematic structural diagram of a measuring wind wheel in the second embodiment.
The arrows in the figure indicate the direction of the wind flow.
In the figure, 1 is a ventilation roadway, 2 is a bearing groove, 3 is a mounting groove, 4 is a main body, 5 is a bearing disc, 6 is a fan blade, 7 is a roller, 8 is a cavity, 9 is a clamping groove, 10 is an insertion rod, 11 is a roller, 12 is a limiting bulge, 13 is a return spring, 14 is a light-emitting unit, 15 is a receiving unit, 16 is a light absorption layer, 17 is a light reflection layer, 18 is a light through hole, 19 is an elastic air-tight piece, 20 is a pressure sensor, and 21 is a pressurizing cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Terms used herein, including technical and scientific terms, have the same meaning as terms commonly understood by one of ordinary skill in the art, unless otherwise defined. It will be understood that terms, which are defined in commonly used dictionaries, have a meaning that is consistent with their meaning in the context of the present art.
The first embodiment.
Referring to fig. 1-5, the coal mine ventilation rate detection device comprises a measurement wind wheel arranged in a ventilation roadway 1, wherein the axis direction of the measurement wind wheel is consistent with that of the ventilation roadway 1; the side wall of the ventilation roadway 1 is provided with a bearing groove 2; the edge of the measuring wind wheel is positioned in the bearing groove 2; the bearing groove 2 is internally provided with a mounting position; the mounting position is provided with a measuring rolling part; the measuring rolling part is contacted with the measuring wind wheel; a pressure detection mechanism is arranged in the mounting position; the measuring rolling part is connected with the pressure detection mechanism; the side part of the bearing groove 2 is provided with a mounting groove 3; a photoelectric sensing element is arranged in the mounting groove 3; the measuring wind wheel is provided with a light sensation part.
Further, the measuring wind wheel comprises a cylindrical main body 4; a bearing disc 5 is arranged on the outer side of the main body 4; the bearing disc 5 is positioned in the bearing groove 2; the bearing grooves 2 are arranged on four inner side walls of the ventilation roadway or two opposite side walls.
In the embodiment, when the ventilation roadway has a square cross section, the four inner side walls of the ventilation roadway can be provided with the bearing grooves 2; when the cross section of the bearing groove is rectangular, the bearing grooves 2 can be arranged on the left and right or upper and lower opposite side walls; so that the measuring wind wheel can rotate under the limit of the bearing groove.
Furthermore, the measuring wind wheel also comprises a plurality of fan blades 6 arranged on the inner side of the main body 4; the fan blades 6 are arranged along the tangential direction of the main body 4; the fan blades 6 are uniformly arranged on the inner side wall of the main body 4 around the axis of the measuring wind wheel; the circumferential surface of the bearing disc 5 is provided with a roller 7; the roller 7 is connected with the upper side wall of the bearing groove 2 in a rolling way.
In the present embodiment, in order to reduce the friction between the receiving disc 5 and the receiving groove 2, it is preferable to provide a roller on the circumferential surface of the receiving disc 5 so that the rolling friction, not the sliding friction, is formed between the receiving disc 5 and the receiving groove; and in the mine operation, the sliding friction is avoided as much as possible, and the possibility of occurrence of sparks is reduced as much as possible.
The measuring wind wheel needs to move in the circumferential direction and the horizontal direction, and rolling connection can be achieved through the rollers.
In the process of passing through the wind flow, the component force of the wind flow can push the measuring wind wheel to rotate along the wind direction of the fan blade 6, and the faster the wind speed is, the faster the rotating speed is inevitably; if the ventilation quantity is reduced and the wind speed is reduced, the rotating speed of the measuring wind wheel is correspondingly reduced.
Furthermore, the mounting position is arranged on the side wall of the bearing groove 2; the mounting position is arranged on one side of the leeward side of the measuring wind wheel; the mounting position is provided with a cavity 8 and a clamping groove 9; the width of the cavity 8 is less than the depth of the bearing groove 2; the pressure detection mechanism is arranged in the chamber 8; the measuring rolling part comprises an inserted link 10 and a roller 11.
In this embodiment, when the wind speed in the roadway reaches or is reduced, the pressure generated by the wind wheel can be measured by the pressure detection mechanism, specifically, the pressure is transmitted to the pressure detection mechanism through the inserted rod 10, and the details are described below.
Furthermore, a limiting bulge 12 is arranged on the outer side of the inserted link 10; a limiting groove is formed in the inner side wall of the clamping groove 9; a return spring 13 is arranged in the limiting groove; the limiting bulge 12 is connected with a return spring 13, and the other end of the return spring is connected to the inner side wall of the limiting groove; the roller 11 is arranged at the outer end of the inserted bar 10; the roller 11 is contacted with the end surface of the bearing disc 5.
Further, the pressure detection mechanism includes an elastic airtight member 19 having an arch shape; further comprising a pressure sensor 20 disposed on a sidewall of the chamber; the elastic airtight piece 19 is hermetically connected with the pressure sensor 20; a pressurizing cavity 21 is formed between the elastic airtight piece 19 and the pressure sensor 30; the pressurizing cavity 21 is filled with liquid; the insert rod 10 abuts against the elastic airtight member 19.
Specifically, in the present embodiment, under the action of wind pressure, the measuring wind wheel is pushed circumferentially, so that the receiving disc 5 generates pressure on the insertion rod 10, and the insertion rod 10 transfers the pressure to the elastic airtight member 19; the elastic airtight piece 19 deforms and pressurizes the liquid in the pressurizing cavity, and finally the pressure sensor 20 can measure the pressure change in the pressurizing cavity and calculate the air pressure after deducting the elastic force of the return spring; when the wind pressure is weakened, the stress of the inserted rod is reduced, the deformation quantity of the elastic airtight piece is reduced, so that the internal pressure of the pressurizing cavity is reduced, and finally, the pressure sensor detects and feeds back the pressure change.
It should be noted that, because the pressure surface of the pressure sensor 20 does not directly contact with the wind flow, but detects the pressure change through the pressure change of the pressurizing cavity, it is in a sealed state, and will not oxidize, and has a long service life.
The wind speed in the fixed section is calculated through the wind pressure, and the wind volume is calculated through the wind speed, which belongs to the conventional technical means, so the details are not repeated.
Furthermore, one side of the bearing groove 2 is provided with an installation groove 3; the width of the mounting groove 3 is smaller than that of the bearing groove 2; the mounting groove 3 is communicated with the bearing groove 2; the photoelectric sensing element comprises a light emitting unit 14 and a receiving unit 15 which are arranged in the mounting groove.
Furthermore, the light sensation part comprises a light absorption layer 16 and a light reflection layer 17 which are coated on the end surface of the bearing disc; the light absorbing layers 16 and the light reflecting layers 17 are uniformly distributed on one side of the bearing disc 5 close to the mounting groove 3 in a staggered mode.
In the embodiment, the light absorbing layer 16 and the light reflecting layer 17 are coated on the end surface of the bearing disc, so that the light absorbing layer 16 and the light reflecting layer 17 alternately pass through the mounting groove 3 when the measuring wind wheel rotates; specifically, when the light reflecting layer 17 passes through, the light emitted by the light emitting unit 14 is reflected and absorbed by the receiving unit 15 to form a high level; when the light absorbing layer 16 passes through, the light emitted from the light emitting unit 14 is absorbed by the light absorbing layer 16, and the receiving unit 15 cannot obtain the optical signal feedback, resulting in a low level. According to the alternating frequency of high and low levels, the rotating speed of the wind wheel can be measured.
Furthermore, the pressure sensor and the photoelectric sensing element are respectively connected with the signal processing terminal.
The real-time wind speed can be calculated by receiving the signals through the signal processing terminal and processing the real-time signals of the pressure sensor and the photoelectric sensing element, or the wind speed can be calculated through the wind pressure; when the photoelectric sensing element fails, the wind speed can still be detected in real time.
Example two.
Referring to fig. 6-7, mounting grooves 3 are arranged on two sides of the receiving groove 2; the width of the mounting groove is smaller than that of the bearing groove; the mounting groove is communicated with the bearing groove; the photoelectric sensing element comprises a correlation type infrared transmitting unit and a correlation type infrared receiving unit which are respectively arranged in the two mounting grooves; the light sensation part comprises light through holes 18 which are uniformly distributed on the bearing disc 5.
The difference between the second embodiment and the first embodiment is that by using the correlation infrared transceiver, when the measurement wind wheel rotates, the light-passing holes 18 alternately pass through the mounting groove 3, so that the correlation infrared transmitting unit and the correlation infrared receiving unit alternately form on-off signals, and the rotating speed can be measured according to the on-off frequency.
It should be noted that, no matter the rotation speed is measured by the alternating frequency of the high and low levels or the infrared on-off frequency, the measurement belongs to the conventional technical means, and the detailed principle thereof is not described again. The wind speed is estimated from the rotational speed, and the principle is the same as that of cup anemometer.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a colliery mine air volume detection device, is including setting up the measurement wind wheel in ventilation tunnel, its characterized in that: the axial directions of the measuring wind wheel and the ventilation roadway are consistent; the side wall of the ventilation roadway is provided with a bearing groove; the edge of the measuring wind wheel is positioned in the bearing groove; the bearing groove is internally provided with an installation position; the mounting position is provided with a measuring rolling part; the measuring rolling part is contacted with the measuring wind wheel; a pressure detection mechanism is arranged in the mounting position; the measuring rolling part is connected with the pressure detection mechanism; the side part of the bearing groove is provided with an installation groove; a photoelectric sensing element is arranged in the mounting groove; the measuring wind wheel is provided with a light sensing part; the measuring wind wheel comprises a cylindrical main body; the outer side of the main body is provided with a bearing disc; the bearing plate is positioned in the bearing groove; the bearing grooves are formed in four inner side walls of the ventilation roadway or two opposite side walls; the measuring wind wheel also comprises a plurality of fan blades arranged on the inner side of the main body; the mounting positions are arranged on the side wall of the bearing groove; the installation position is arranged on one side of the leeward side of the measuring wind wheel; the mounting position is provided with a cavity and a clamping groove; the width of the cavity is smaller than that of the bearing groove; the pressure detection mechanism is arranged in the cavity; the measuring rolling part comprises an inserted bar and a roller; a limiting bulge is arranged on the outer side of the inserted link; a limiting groove is formed in the inner side wall of the clamping groove; a return spring is arranged in the limit groove; the limiting bulge is connected with the return spring; the roller is arranged at the outer end of the inserted rod; the roller is contacted with the end surface of the bearing disc; the pressure detection mechanism comprises an arched elastic airtight piece; the pressure sensor is arranged on the side wall of the chamber; the elastic airtight piece is hermetically connected with the pressure sensor; a pressurizing cavity is formed between the elastic airtight piece and the pressure sensor; the pressurizing cavity is filled with liquid; the pressure sensor is connected with the signal processing terminal.
2. The coal mine ventilation detecting device of claim 1, wherein: the fan blades are arranged along the tangential direction of the main body; the fan blades are uniformly arranged on the inner side wall of the main body around the axis of the measuring wind wheel; the circumferential surface of the bearing disc is provided with a roller; the rollers are in rolling connection with the upper side wall of the bearing groove.
3. The coal mine ventilation detecting device of claim 1, wherein: one side of the bearing groove is provided with an installation groove; the width of the mounting groove is smaller than that of the bearing groove;
the mounting groove is communicated with the bearing groove; the photoelectric sensing element comprises a light-emitting unit and a receiving unit which are arranged in the mounting groove; the photoelectric sensing element is connected with the signal processing terminal.
4. The coal mine ventilation detecting device of claim 3, wherein: the light sensation part comprises a light absorption layer and a light reflection layer coated on the end surface of the bearing disc; the light absorption layer and the light reflection layer are uniformly and alternately distributed on one side of the bearing disc close to the mounting groove.
5. The coal mine ventilation detecting device of claim 1, wherein: mounting grooves are arranged on two sides of the bearing groove; the width of the mounting groove is smaller than that of the bearing groove; the mounting groove is communicated with the bearing groove; the photoelectric sensing element comprises a correlation type infrared transmitting unit and a correlation type infrared receiving unit which are respectively arranged in the two mounting grooves; the light sensation part comprises light through holes which are uniformly distributed on the bearing disc; the photoelectric sensing element is connected with the signal processing terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210629862.5A CN114705255B (en) | 2022-06-06 | 2022-06-06 | Colliery mine air volume detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210629862.5A CN114705255B (en) | 2022-06-06 | 2022-06-06 | Colliery mine air volume detection device |
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| CN114705255A CN114705255A (en) | 2022-07-05 |
| CN114705255B true CN114705255B (en) | 2022-08-23 |
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| CN206557188U (en) * | 2017-03-01 | 2017-10-13 | 西安科技大学 | A kind of mine laneway flow of flue gas simulated testing system |
| WO2022073302A1 (en) * | 2020-10-10 | 2022-04-14 | 中国矿业大学(北京) | Magnetic suspension local ventilator for mining |
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