CN216295817U - Safe mixing device of low concentration coal mine gas - Google Patents
Safe mixing device of low concentration coal mine gas Download PDFInfo
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- CN216295817U CN216295817U CN202122775352.2U CN202122775352U CN216295817U CN 216295817 U CN216295817 U CN 216295817U CN 202122775352 U CN202122775352 U CN 202122775352U CN 216295817 U CN216295817 U CN 216295817U
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Abstract
The utility model discloses a safe mixing device for low-concentration coal mine gas, wherein a mine ventilation pipe and a coal bed gas pipe are communicated and arranged on a mixing box, an air mixing device is fixedly arranged in an inner cavity of the mixing box, a front return pipeline is communicated with a buffer box, and the buffer box is communicated with the mixing box through a rear return pipeline; the intercommunication is provided with the air-supply line on the air stores up the aerofoil, the output of two-way rotating electrical machines is all fixed and is provided with the lead screw, be provided with the rack through the connecting rod is fixed on the nut piece, fixed being provided with on the rotary rod mixes wind blade and gear, the gear can be driven and then take place rotatoryly by rack toothing. The utility model provides a safe mixing device for low-concentration coal mine gas, which can be used for preliminarily mixing mine ventilation and coal bed gas through a static device, then diluting air, and automatically refluxing and starting a dynamic air mixing device when the concentration is too high, so that the air mixing effect is better, and the whole coal mine gas is more energy-saving.
Description
Technical Field
The utility model relates to the technical field of gas utilization, in particular to a safe mixing device for low-concentration coal mine gas.
Background
The methane is colorless, tasteless, odorless and combustible gas, the concentration of explosion conditions is 5-16%, the oxygen is more than 12%, and explosion can be caused when the methane meets open fire or the temperature is 650-750 ℃, and the methane is the first natural enemy of coal miners under coal mines. However, the gas is not fully utilized at present, and the heat generated by the gas combustion is used for discharging the waste gas generated after power generation from a chimney, so that a large amount of heat is lost, and improvement is needed.
In the prior art, an automatic blending type blending system of low-concentration methane in coal mine ventilation air methane with application number "202120097796.2", relates to the technical field of coal mine safety, and comprises a ventilation air methane delivery pipe and a gas drainage pipe, wherein the ventilation air methane delivery pipe and the gas drainage pipe are connected with the blending pipe at the same time, a static mixing device and a dynamic mixing device are sequentially arranged in the blending pipe according to the airflow direction, the static mixing device comprises a plurality of guide plates arranged on the inner wall of the blending pipe, the guide plates are sequentially arranged along the airflow direction, adjacent guide plates are arranged in a staggered manner, the dynamic mixing device comprises a bracket fixed on the inner wall of the blending pipe, a rotating shaft is movably arranged on the bracket, a plurality of blades are arranged on the rotating shaft, the rotating shaft is connected with a driving mechanism, the driving mechanism is used for driving the rotating shaft to rotate, and the automatic blending type blending system of low-concentration methane in coal mine ventilation air methane passes through the combined action of the static mixing device and the dynamic mixing device, the method has the advantages of fully mixing the mixed gas and improving the mixing precision.
It still has drawbacks: 1. the dynamic mixing device in the above device is always in operation, but when the static mixing device has fully mixed the gas, the dynamic mixing will cause useless power consumption and increase the cost; 2. the device is mainly suitable for mixing small pipeline gas, is not suitable for a mixing system of larger equipment, and has a limited action range.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to provide an automatic blending type blending system for low-concentration methane of coal mine ventilation air to solve the problems in the background technology.
A safe mixing device for low-concentration coal mine gas comprises a mixing box, wherein a mine air exchange pipe and a coal bed gas pipe are communicated and arranged on the mixing box, an air mixing device is fixedly arranged in an inner cavity of the mixing box, a mixed flow pipeline is communicated and arranged on the mixing box, two shunt pipelines are communicated and arranged on the mixed flow pipeline, the shunt pipelines are communicated and arranged on the mixing box, an exhaust pipe is communicated and arranged at one end, away from the shunt pipeline, of the mixing box, a concentration detector and a first valve are sequentially arranged on the exhaust pipe, a front backflow pipeline is communicated and arranged on a section of the exhaust pipe, which is positioned between the concentration detector and the first valve, the front backflow pipeline is communicated with a buffer box, the buffer box is communicated with the mixing box through a rear backflow pipeline, and a second valve is arranged on the rear backflow pipeline;
the utility model discloses a mixing box, including mixing box, top wall and diapire, it is provided with air storage plate all to fix on mixing box's the roof and the diapire, the intercommunication is provided with the air-supply line on the air storage plate, the fixed two direction rotating electrical machines that are provided with on mixing box's the outer wall, the output of two direction rotating electrical machines is all fixed and is provided with the lead screw, be provided with the nut piece through the screw thread activity on the lead screw, be provided with the rack through the connecting rod is fixed on the nut piece, the roof both ends and the diapire both ends of mixing box are all fixed and are provided with the secondary bearing seat, the articulated rotary rod that is provided with in the secondary bearing seat, fixed mixed wind blade and the gear of being provided with on the rotary rod, the gear can be driven and then take place the rotation by rack toothing.
Preferably, the air mixing device comprises an air distribution plate and a flow baffle plate, a plurality of air equalizing holes are formed in the air distribution plate, and the flow baffle plate is fixed on the upper wall and the lower wall of the inner cavity of the mixing box in a staggered mode.
Preferably, the two shunt pipelines are respectively communicated with the upper end and the lower end of the inner cavity of the mixing box, and the rear return pipeline is communicated with the middle part of the inner cavity of the mixing box.
Preferably, the air inlet pipe has a plurality ofly, just the intercommunication of air inlet pipe equidistance sets up on air storage plate.
Preferably, one end of the screw rod, which is far away from the bidirectional rotating motor, is hinged in a first bearing seat, and the first bearing seat is fixedly arranged on the inner side wall of the blending box.
Preferably, one side of the rack, which is far away from the connecting rod, is fixedly provided with an air outlet block, a plurality of air outlet holes are formed in the air outlet block, and an air cavity of the air outlet block is communicated with the air storage plate through an elastic air pipe.
Has the advantages that:
1. according to the safe mixing device for the low-concentration coal mine gas, firstly, mine ventilation and coal bed gas are primarily mixed through the static device, then air is mixed for dilution, and the three are mixed again through the conventional static device, so that the final mixing is more uniform, and the effect is better;
2. the safe mixing device for the low-concentration coal mine gas is internally provided with the concentration detector, when the detected concentration exceeds a preset value, the gas flows back to the mixing box through the backflow pipeline, the automatic controller controls the bidirectional rotating motor to start at the moment, and the mine air exchange and the coal bed gas and the air are dynamically mixed, so that the mixing effect is better, the dynamic air mixing device is started at the moment, the whole energy is saved, and the treatment cost is effectively reduced;
3. according to the safe mixing device for the low-concentration coal mine gas, the built-in air mixing blades are respectively arranged at the top end and the bottom end of the inner cavity of the mixing box and are mainly used for mixing air at the edge dead angle in the mixing box, so that air mixing blind areas are effectively reduced, and the whole mixing effect is improved.
The utility model provides a safe mixing device for low-concentration coal mine gas, which can be used for preliminarily mixing mine ventilation and coal bed gas through a static device, then diluting air, and automatically refluxing and starting a dynamic air mixing device when the concentration is too high, so that the air mixing effect is better, and the whole coal mine gas is more energy-saving.
Drawings
FIG. 1 is a schematic diagram of the position relationship of the main structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the blender box of the present invention.
In the figure: 1. a mixing box; 2. exchanging air pipes for mines; 3. a coal bed gas pipe; 4. a wind distribution plate; 401. air equalizing holes; 5. a flow baffle plate; 6. a mixed flow conduit; 601. a diversion pipeline; 7. a blending box; 8. an exhaust pipe; 9. a concentration detector; 10. a first valve; 11. a front return line; 12. a buffer tank; 13. a post-return line; 14. a second valve; 15. an air reservoir plate; 16. an air inlet pipe; 17. a bidirectional rotating electrical machine; 18. a lead screw; 19. a first bearing housing; 20. a nut block; 21. a connecting rod; 22. a rack; 23. an air outlet block; 231. an air outlet; 24. an elastic air tube; 25. a second bearing housing; 26. rotating the rod; 27. a wind mixing blade; 28. a gear.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The utility model provides the following technical scheme:
the first embodiment is as follows:
a safe mixing device of low-concentration coal mine gas comprises a mixing box 1, wherein a mine ventilation pipe 2 and a coal bed gas pipe 3 are communicated and arranged on the mixing box 1 and used for respectively leading gas for mine ventilation and coal bed gas, an air mixing device is fixedly arranged in an inner cavity of the mixing box 1 and can uniformly mix the mine ventilation gas and the coal bed gas, the air mixing device can be a static air mixing device, namely an air mixing structure driven by a power source is not needed, the electricity and the energy are saved, a mixed flow pipeline 6 is communicated and arranged on the mixing box 1, two shunt pipelines 601 are communicated and arranged on the mixed flow pipeline 6, the shunt pipelines 601 are communicated with the mixing box 7, air is added into the mixing box 7 for dilution, and then the mixture of the mine ventilation gas, the coal bed gas and the air is mixed, one end of the mixing box 7, which is far away from the shunt pipelines 601, is communicated and provided with an exhaust pipe 8, the exhaust pipe 8 is sequentially provided with a concentration detector 9 and a first valve 10, the concentration detector 9 is mainly used for detecting whether the concentration of the mixed gas is within a preset range, if not, the first valve 10 is automatically closed through the action of an external controller to prevent the gas which does not meet the requirement from being directly discharged, if so, the first valve 10 is opened to exhaust air, the pipe section of the exhaust pipe 8 between the concentration detector 9 and the first valve 10 is communicated with a front backflow pipeline 11, the gas which does not meet the requirement, namely the gas with the overhigh concentration, flows back and is reprocessed through the front backflow pipeline 11, the front backflow pipeline 11 is communicated with a buffer tank 12, the buffer tank 12 mainly has the function of avoiding more backflow gas, further leading to the condition of larger internal air pressure of the mixing tank 7 and avoiding potential safety hazards, the buffer tank 12 is communicated with the mixing tank 7 through a rear backflow pipeline 13, and a second valve 14 is arranged on the rear return pipeline 13, and whether the buffer tank 12 is communicated with the blending tank 7 or not can be controlled by opening and closing the second valve 14.
The top wall and the bottom wall of the mixing box 7 are both fixedly provided with an air storage plate 15, the air storage plate 15 stores air for dilution, and plays a role of temporary air storage, the air storage plate 15 is communicated with an air inlet pipe 16, the air inlet pipes 16 are provided with a plurality of air, and the air inlet pipes 16 are communicated with the air storage plate 15 at equal intervals, so that the blown air is distributed more uniformly, and the situation of large local difference is avoided, the outer wall of the mixing box 7 is fixedly provided with two bidirectional rotating motors 17, the output ends of the bidirectional rotating motors 17 are both fixedly provided with lead screws 18, therefore, the bidirectional rotating motors 17 can drive the lead screws 18 to switch between positive rotation and negative rotation, one end of the lead screw 18, which is far away from the bidirectional rotating motor 17, is hinged in a first bearing seat 19, the lead screw 18 can rotate, the first bearing seat 19 is fixedly arranged on the inner side wall of the mixing box 7, therefore, the first bearing seat 19 mainly plays a role in movably supporting and positioning, the screw rod 18 is movably provided with the nut block 20 through threads, when the screw rod 18 rotates in situ, the nut block 20 can move in the horizontal direction along the screw rod 18, the nut block 20 is fixedly provided with the rack 22 through the connecting rod 21, therefore, the nut block 20 can drive the rack 22 to move along with the rack through the connecting rod 21, the movement mainly refers to that in the horizontal direction, the two ends of the top wall and the two ends of the bottom wall of the blending box 7 are fixedly provided with the second bearing seats 25, the second bearing seats 25 are hinged with the rotating rods 26, the rotating rods 26 can rotate in the second bearing seats 25, the rotating rods 26 are fixedly provided with the air mixing blades 27 and the gears 28, when the air mixing blades 27 rotate, the mixture of mine ventilation gas, coal bed gas and air can be stirred and blended, so that the mixing is more uniform, the gear 28 can be engaged by the rack 22 to rotate, and the gear 28 can drive the rotating rod 26 to rotate, so that the wind mixing blade 27 rotates.
The working principle is as follows:
during the use, the gas and the coal bed gas that trade the wind with the mine respectively through mine trade tuber pipe 2 and coal bed gas pipe 3 let in mixing box 1, these two kinds of gases can loop through the fixed wind device that mixes that sets up in the inner chamber of mixing box 1, and the wind device that mixes here can be for static wind device that mixes, and later, the gas after the mixture gets into the reposition of redundant personnel pipeline 601 at both ends through mixed flow pipeline 6, and the while gets into in mixing box 7.
The top and the bottom of the blending box 7 are provided with air storage plates 15, the air storage plates 15 are communicated with a plurality of air inlet pipes 16 for blowing air for dilution, the mixture of the originally introduced mine ventilation gas and the coal bed gas transversely enters the blending box 7 from the outlet end of the diversion pipeline 601, and the air inlet pipes 16 blow air longitudinally, so that the two air flows are crossed, and the mixing effect of the mine ventilation gas, the coal bed gas and the air is improved, it is noted that when the gas is blown out from the diversion pipeline 601, the air flow blows to the air mixing blades 27, so that the air mixing blades 27 are likely to be blown to drive the rotating rods 26 to rotate, blending is realized, the mixed gas is discharged into the exhaust pipe 8, and firstly needs to be detected by the concentration detector 9, if the detected concentration is within a predetermined range, the first valve 10 is opened, and the mixed gas is discharged;
if the gas concentration detected by the concentration detector 9 exceeds a predetermined value, the controller automatically controls the first valve 10 to close, at this time, the gas enters the buffer tank 12 through the front return pipeline 11, after the gas is buffered and stopped in the buffer tank 12, the second valve 14 is opened, the gas flows back into the blending tank 7 through the rear return pipeline 13, at this time, the controller automatically controls the bidirectional rotating motor 17 to start, the bidirectional rotating motor 17 drives the lead screw 18 to rotate, the nut block 20 moves along the lead screw 18, the nut block 20 drives the rack 22 to move through the connecting rod 21, the bidirectional rotating motor 17 is periodically switched between forward rotation and reverse rotation, the rack 22 swings in the horizontal direction, the rack 22 can drive the gear 28 to rotate, the gear 28 drives the rotating rod 26 to rotate, the air mixing blade 27 can rotate, and the mine ventilation gas, the coal bed gas and the air are dynamically mixed, effectively improve original mixed effect, and mix wind blade 27 and set up inner chamber top both sides and bottom both sides at mixing box 7, these places are traditional dead angle that mixes, therefore the device can mix to the blind area dead angle effectively, effectively improve the mixing effect, and finally, the mist after the mixing passes through concentration detector 9 once more, if it is qualified to detect, then first valve 10 is opened, gaseous can directly be followed blast pipe 8 and discharged, buffer box 12 at this moment still has buffer gas's effect, of course, in order to prevent that the suitable gaseous entering buffer box 12 of concentration, also can additionally add on preceding backflow pipeline 11 and establish a valve, do not regard as the restriction here, can carry out the flexibility according to actual in service behavior and select.
Example two:
compared with the first embodiment, the present embodiment further discloses the specific components of the air mixing device: mix the wind device and include the board 4 and keep off and flow 5, seted up a plurality of wind holes 401 on the board 4, wind holes 401 is the equidistance and evenly lays for the equidistance for gas distribution is more even, keeps off and flows 5 alternating expression and be fixed in the upper and lower wall of inner chamber of mixing box 1, and consequently gaseous when keeping off the board 5 through this group, can remove along upper and lower passageway, further extension mixes the wind route, and the reinforcing mixes the wind effect.
Example three:
in this embodiment, on the basis of the first embodiment, the positions of the two branch pipes 601 and the rear return pipe 13 are further defined: the two shunt pipes 601 are respectively communicated with the upper end and the lower end of the inner cavity of the mixing box 7, because the air mixing blades 27 are also arranged at the upper end and the lower end, air flow can directly blow to the air mixing blades 27 to rotate, the air mixing effect is improved when no power assistance exists, the rear backflow pipe 13 is communicated with the middle of the inner cavity of the mixing box 7 because the air inlet pipes 16 are symmetrically arranged on two sides, at the moment, transverse wind force blown out by the rear backflow pipe 13 can be mutually crossed with longitudinal wind force blown out by the air inlet pipes 16, and the air mixing effect is better when backflow is realized.
Example four:
the following structure is added in this embodiment: one side that connecting rod 21 was kept away from to rack 22 is fixed and is provided with air outlet block 23, a plurality of exhaust vents 231 have been seted up on air outlet block 23, the wind chamber of air outlet block 23 communicates in air storage plate 15 through elasticity trachea 24, therefore, when two-way rotating electrical machines 17 started, rack 22 also can drive air outlet block 23 synchronous motion, air outlet 231 has been seted up on air outlet block 23, the air current in air storage plate 15 can outwards blow off through exhaust vent 231, in addition air outlet block 23 is the removal, consequently, the air position that blows off also can change, and then realize dynamic mixing, realize good gas mixing.
The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The utility model provides a safe mixing device of low concentration coal mine gas, includes mixing box (1), its characterized in that: the coal bed gas mixing device is characterized in that a mine air exchange pipe (2) and a coal bed gas pipe (3) are communicated and arranged on the mixing box (1), an air mixing device is fixedly arranged in an inner cavity of the mixing box (1), a mixed flow pipeline (6) is communicated and arranged on the mixing box (1), two shunt pipelines (601) are communicated and arranged on the mixed flow pipeline (6), the shunt pipelines (601) are communicated and arranged with the mixing box (7), an exhaust pipe (8) is communicated and arranged at one end, far away from the shunt pipeline (601), of the mixing box (7), a concentration detector (9) and a first valve (10) are sequentially arranged on the exhaust pipe (8), a front backflow pipeline (11) is communicated and arranged on a pipe section of the exhaust pipe (8) between the concentration detector (9) and the first valve (10), the front backflow pipeline (11) is communicated and arranged on the buffer box (12), and the buffer box (12) is communicated and arranged on the mixing box (7) through a rear backflow pipeline (13), a second valve (14) is arranged on the rear return pipeline (13);
the top wall and the bottom wall of the mixing box (7) are both fixedly provided with air storage plates (15), an air inlet pipe (16) is communicated with the air storage plate (15), two bidirectional rotating motors (17) are fixedly arranged on the outer wall of the mixing box (7), the output ends of the two-way rotating motors (17) are fixedly provided with screw rods (18), a nut block (20) is movably arranged on the screw rod (18) through threads, a rack (22) is fixedly arranged on the nut block (20) through a connecting rod (21), two second bearing seats (25) are fixedly arranged at two ends of the top wall and two ends of the bottom wall of the mixing box (7), a rotating rod (26) is hinged in the second bearing block (25), a wind mixing blade (27) and a gear (28) are fixedly arranged on the rotating rod (26), the gear (28) can be engaged by the rack (22) to rotate.
2. The safe blending device of the low-concentration coal mine gas as claimed in claim 1, wherein: the air mixing device comprises an air distribution plate (4) and a flow baffle plate (5), a plurality of air equalizing holes (401) are formed in the air distribution plate (4), and the flow baffle plate (5) is fixed on the upper wall and the lower wall of an inner cavity of the mixing box (1) in a staggered mode.
3. The safe blending device of the low-concentration coal mine gas as claimed in claim 1, wherein: the two shunt pipelines (601) are respectively communicated with the upper end and the lower end of the inner cavity of the mixing box (7), and the rear return pipeline (13) is communicated with the middle part of the inner cavity of the mixing box (7).
4. The safe blending device of the low-concentration coal mine gas as claimed in claim 1, wherein: the air inlet pipe (16) is provided with a plurality of air inlet pipes (16) which are communicated with each other at equal intervals on the air storage plate (15).
5. The safe blending device of the low-concentration coal mine gas as claimed in claim 1, wherein: one end of the lead screw (18), which is far away from the bidirectional rotating motor (17), is hinged in a first bearing seat (19), and the first bearing seat (19) is fixedly arranged on the inner side wall of the blending box (7).
6. The safe blending device of the low-concentration coal mine gas as claimed in claim 1, wherein: one side of the rack (22) far away from the connecting rod (21) is fixedly provided with an air outlet block (23), the air outlet block (23) is provided with a plurality of air outlet holes (231), and an air cavity of the air outlet block (23) is communicated with the air storage plate (15) through an elastic air pipe (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122775352.2U CN216295817U (en) | 2021-11-14 | 2021-11-14 | Safe mixing device of low concentration coal mine gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122775352.2U CN216295817U (en) | 2021-11-14 | 2021-11-14 | Safe mixing device of low concentration coal mine gas |
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| CN216295817U true CN216295817U (en) | 2022-04-15 |
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| CN202122775352.2U Active CN216295817U (en) | 2021-11-14 | 2021-11-14 | Safe mixing device of low concentration coal mine gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117654348A (en) * | 2024-02-01 | 2024-03-08 | 沁水寺河瓦斯发电有限公司 | Gas mixing device for gas power generation |
-
2021
- 2021-11-14 CN CN202122775352.2U patent/CN216295817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117654348A (en) * | 2024-02-01 | 2024-03-08 | 沁水寺河瓦斯发电有限公司 | Gas mixing device for gas power generation |
| CN117654348B (en) * | 2024-02-01 | 2024-04-23 | 沁水寺河瓦斯发电有限公司 | Gas mixing device for gas power generation |
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