CN113153366A - Pressurizing device and ultra-long distance guniting system for underground coal mine - Google Patents
Pressurizing device and ultra-long distance guniting system for underground coal mine Download PDFInfo
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- CN113153366A CN113153366A CN202110283607.5A CN202110283607A CN113153366A CN 113153366 A CN113153366 A CN 113153366A CN 202110283607 A CN202110283607 A CN 202110283607A CN 113153366 A CN113153366 A CN 113153366A
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- 239000003245 coal Substances 0.000 title claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 76
- 238000010438 heat treatment Methods 0.000 claims description 44
- 239000007921 spray Substances 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000004567 concrete Substances 0.000 abstract description 27
- 239000007789 gas Substances 0.000 description 82
- 239000007788 liquid Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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Abstract
The invention discloses a pressurizing device for underground coal mine and an ultra-long distance guniting system, which comprises an air supply device and a conveying pipeline, wherein a plurality of pressurizers are connected in series on the conveying pipeline; the device comprises a gas supply device, a conveying pipeline and a plurality of pressurizers, wherein the pressurizers comprise pressurizing pipes, two ends of each pressurizing pipe are connected with the conveying pipeline, gas inlet pipes are arranged on the pressurizing pipes, first wear-resistant pipes and second wear-resistant pipes which are arranged oppositely and horn-shaped are arranged in the pressurizing pipes and at the connection parts of the pressurizing pipes and the gas inlet pipes, the first wear-resistant pipes and the second wear-resistant pipes are arranged in the pressurizing pipes according to the sequence of slurry transportation, the diameters of the outer end parts of the second wear-resistant pipes are larger than those of the outer end parts of the first wear-resistant pipes, and gas inlet gaps for communicating the gas inlet pipes and the pressurizing pipes are arranged between the first wear-resistant pipes and the second wear-resistant pipes; the invention can operate the concrete slurry in an extra long distance and ensures the concrete to have better quality.
Description
Technical Field
The invention relates to mining equipment, in particular to a pressurizing device and an ultra-long distance guniting system for underground coal mines.
Background
The concrete sprayed supports of the underground roadway and the electromechanical chamber of the coal mine have the characteristics of timeliness, close adhesion, early strength and sealing, so that the main roadway, the cross cut coal uncovering zone and the fault zone in the coal mine need to be sprayed with slurry, and the air leakage plays two roles in the thermal balance relation of the coal oxidation process: one is to provide the oxygen necessary for oxidation to the coal; and the second is to take away the heat generated by oxidation. Generally, the air leakage rate is small and mainly plays a role of the former, so the air leakage is the most critical influence factor for causing the spontaneous combustion of the coal. The leakage stoppage is an important means for preventing coal from spontaneous combustion, the slurry spraying work is to prevent natural ignition by blocking air leakage to enable the coal to be in an anoxic state, and a common spraying back applicator comprises sprayed concrete and chemical materials, wherein the chemical materials are mostly polyurethane foam.
The tunnel guniting and leaking stoppage air technology effectively reduces air leakage of the tunnel into a coal seam, greatly reduces danger of spontaneous combustion of the coal seam, however, the tunnel guniting materials and the tunnel guniting technology are traditional at present in a longitudinal view, such as: the traditional concrete material guniting roadway is difficult to operate, small in guniting flow, large in transportation amount of materials such as cement and sand, and not easy to apply in a large number of underground coal mines in underground construction. According to the prior art and the field use condition, the underground coal mine conveying system can convey 200 meters at most under the influence of multiple factors such as material gravity, viscosity, air pressure and the like, and because the space of an underground roadway is limited, the transportation of materials required by guniting is limited by space, so that how to solve the technical problem that the remote conveying of the underground guniting material is always unsolved by coal mine enterprises; in addition, in the existing guniting pressurizer, the slurry can violently impact the joint of the pressurizing pipe and the air inlet pipe in the pressurizing process, so that the pressurizer is damaged, and the service life of the pressurizer is shortened. In addition, the temperature of concrete slurry is too low due to long-distance conveying in the underground coal mine, particularly in winter, and the concrete pipe is easily blocked due to too low temperature of the concrete, so that inconvenience is brought to concrete construction; the concrete has the problems of slow solidification, large resilience, large using amount of the accelerator and the like due to over-temperature of the concrete.
Therefore, the coal mine underground pressurizing device and the ultra-long distance guniting system are improved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a pressurizing device for a coal mine underground and an ultra-long distance guniting system.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a pressurizing device for underground coal mine, which comprises an air supply device and a conveying pipeline, wherein a plurality of pressurizers are connected in series on the conveying pipeline; the device comprises a gas supply device, a conveying pipeline and a plurality of pressurizers, wherein the pressurizers comprise pressurizing pipes, two ends of each pressurizing pipe are connected with the conveying pipeline, gas inlet pipes are arranged on the pressurizing pipes, first wear-resistant pipes and second wear-resistant pipes which are arranged oppositely and horn-shaped are arranged in the pressurizing pipes and at the connection parts of the pressurizing pipes and the gas inlet pipes, the first wear-resistant pipes and the second wear-resistant pipes are arranged in the pressurizing pipes according to the sequence of slurry transportation, the diameters of the outer end parts of the second wear-resistant pipes are larger than those of the outer end parts of the first wear-resistant pipes, and gas inlet gaps for communicating the gas inlet pipes and the pressurizing pipes are arranged between the first wear-resistant pipes and the second wear-resistant pipes; the air supply equipment is connected with the air inlet pipe through an air delivery pipe; and the air inlet end of the air supply equipment is connected with a steam heating device.
As a preferred technical scheme of the invention, the invention provides an ultra-long distance guniting system of a pressurizing device for an underground coal mine, which comprises a feeding machine and an injection machine, wherein a discharge hole of the feeding machine is connected with a hopper on the injection machine; the feeding end of the sectional type multistage continuous pressurizing pipeline is connected with an injection pipe of an injection machine, and the discharging end of the sectional type multistage continuous pressurizing pipeline is connected with a spray head.
As a preferred technical scheme of the invention, the gas transmission pipe comprises a gas supply main pipe connected with the gas outlet end of the gas supply equipment, and the gas supply main pipe is respectively connected with the gas inlet pipe on each pressurizer through a gas transmission branch pipe; a first switch valve is arranged at one end of the conveying branch pipe close to the air inlet pipe, an air discharging pipe is arranged on the conveying branch pipe, and a second switch valve is arranged on the air discharging pipe; and the air supply main pipe is provided with an air pressure meter.
As a preferred technical scheme of the invention, the steam heating device comprises a steam generating tank and a water body preheating tank, wherein a conical heating block is arranged in an inner cavity of the steam generating tank, a resistance heating wire is arranged in the heating block, a steam outlet pipe is arranged at the top of the steam generating tank and is connected with an air inlet end of an air supply device through a steam guide pipe; the top of the inner cavity of the steam generating tank is provided with a spray header facing the heating block, the bottom of the inner cavity of the steam generating tank is provided with a water receiving cover, the water receiving cover is connected with the water body preheating tank through a water guide pipe, and the water guide pipe is provided with a delivery pump; the middle part of the steam generating tank is provided with an air inlet; the water body preheating tank is communicated with a water path of the spray header through a conveying pump pipe group.
As a preferable technical scheme of the invention, the gas supply main pipe is provided with a temperature sensor and a steam concentration sensor.
As a preferred technical scheme of the invention, the steam outlet pipe is connected with a gas mixing tank, the gas mixing tank is provided with an air inlet pipe, and the air inlet end of the air inlet pipe is connected with an air filtering device; and the air inlet pipe is provided with an opening regulating valve.
As a preferred technical scheme of the invention, the pressurizing pipe is connected with the conveying pipeline through a flange or a quick-connection plug.
As a preferred technical scheme of the invention, the pressurizing device for the underground coal mine and the use method of the ultra-long distance guniting system have the advantages that slurry is sent into a hopper on a sprayer through a feeding machine, the sprayer sprays the slurry into a sectional type multistage continuous pressurizing pipeline, and a plurality of pressurizers in the sectional type multistage continuous pressurizing pipeline are used for pressurizing and conveying; the working mode of the sectional type multistage continuous pressurization pipeline is that the steam heating device generates high-temperature steam, the high-temperature steam is introduced into an air inlet pipe on the pressurizer in a compressed state under the action of air supply equipment and enters the conveying pipeline, wherein compressed air entering from the air inlet pipe enables a negative pressure environment to be formed in the conveying pipeline, slurry is pushed by negative pressure and high-pressure air to continue to advance along the conveying pipeline, and ultra-long-distance transportation of the slurry is realized under multistage pressurization of a plurality of pressurizers; wherein, the slurry in the conveying pipeline can be continuously humidified and heated by using the water vapor with higher temperature; the concrete slurry after being transported in an ultra-long distance is ensured to have higher temperature and humidity, so that the concrete slurry has higher strength after being solidified; a first wear-resistant pipe and a second wear-resistant pipe which are arranged oppositely and horn-shaped are arranged in the pressurizing pipe and at the connection part of the first wear-resistant pipe and the air inlet pipe, the first wear-resistant pipe and the second wear-resistant pipe are arranged in the pressurizing pipe according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe is larger than that of the outer end part of the first wear-resistant pipe, and an air inlet gap for communicating the air inlet pipe and the pressurizing pipe is arranged between the first wear-resistant pipe and the second wear-resistant pipe; utilize first wear-resisting pipe and second wear-resisting pipe to play crashproof abrasionproof effect to the forcing pipe, avoid concrete thick liquids to carry out the pressurized in-process at the forcing pipe under negative pressure and high-pressure gas promote, concrete thick liquids take place violent collision with the junction of forcing pipe and intake pipe and damage the presser.
As a preferred technical scheme of the invention, the steam heating device is adjusted before guniting, wherein the method for adjusting the steam heating device comprises the steps of pumping a water body preheated by a water body preheating tank into a spray header through a delivery pump pipe group, spraying the water body into a heating block from the spray header, generating a large amount of steam under the action of the heating block, sucking the generated large amount of steam into a gas mixing tank under the suction action of a gas supply system, guiding the steam into a gas supply main pipe, and respectively detecting the temperature, the steam concentration and the air pressure of mixed gas in the gas supply main pipe by using a temperature sensor, a steam concentration sensor and an air pressure gauge on the gas supply main pipe; when the temperature and the water vapor concentration of the gas are simultaneously too high, the opening regulating valve on the air inlet pipe on the gas mixing tank is opened, and then the outside air is synchronously sucked to mix the gas containing the water vapor with higher temperature, so that the effects of regulating the temperature and the water vapor concentration of the mixed gas in the gas supply main pipe are achieved.
The invention has the beneficial effects that: 1. according to the pressurization device for the underground coal mine and the ultra-long distance guniting system, slurry is sent into a hopper on a sprayer through a feeding machine, the sprayer sprays the slurry into a sectional type multistage continuous pressurization pipeline, and multistage continuous pressurization conveying is carried out by utilizing a plurality of pressurizers in the sectional type multistage continuous pressurization pipeline, so that concrete slurry can be subjected to treatment; the working mode of the sectional type multistage continuous pressurization pipeline is that the steam heating device generates high-temperature steam, the high-temperature steam is introduced into an air inlet pipe on the pressurizer in a compressed state under the action of air supply equipment and enters the conveying pipeline, wherein compressed air entering from the air inlet pipe enables a negative pressure environment to be formed in the conveying pipeline, slurry is pushed by negative pressure and high-pressure air to continue to advance along the conveying pipeline, and ultra-long-distance transportation of the slurry is realized under multistage pressurization of a plurality of pressurizers; wherein, the slurry in the conveying pipeline can be continuously humidified and heated by using the water vapor with higher temperature; the concrete slurry after being transported over a long distance is ensured to have higher temperature and humidity, so that the concrete slurry has higher strength after being solidified, a large amount of dust cannot be generated in the process of guniting, and the effect of inhibiting the dust is achieved; a first wear-resistant pipe and a second wear-resistant pipe which are arranged oppositely and horn-shaped are arranged in the pressurizing pipe and at the connection part of the first wear-resistant pipe and the air inlet pipe, the first wear-resistant pipe and the second wear-resistant pipe are arranged in the pressurizing pipe according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe is larger than that of the outer end part of the first wear-resistant pipe, and an air inlet gap for communicating the air inlet pipe and the pressurizing pipe is arranged between the first wear-resistant pipe and the second wear-resistant pipe; utilize first wear-resisting pipe and the wear-resisting effect of second to having played crashproof abrasionproof to the forcing pipe, avoid concrete thick liquids to carry out the pressurized in-process at the forcing pipe under negative pressure and high-pressure gas promote, concrete thick liquids take place violent collision with the junction of forcing pipe and intake pipe and damage the presser, have reduced the life of presser.
2. The method for adjusting the steam heating device comprises the steps that firstly, a water body preheated by a water body preheating tank is pumped into a spray header through a conveying pump pipe group and sprayed into a heating block from the spray header, then a large amount of water vapor is generated under the action of the heating block, the generated large amount of water vapor is sucked into a gas mixing tank under the suction action of a gas supply system and is guided into a gas supply main pipe, and the temperature sensor, the water vapor concentration sensor and the air pressure meter on the gas supply main pipe are used for respectively detecting the temperature, the water vapor concentration and the air pressure of mixed gas on the gas supply main pipe; when the temperature and the water vapor concentration of the gas are simultaneously too high, the opening regulating valve on the air inlet pipe on the gas mixing tank is opened, and then the outside air is synchronously sucked to mix the gas containing the water vapor with higher temperature, so that the effects of regulating the temperature and the water vapor concentration of the mixed gas in the gas supply main pipe are achieved.
This kind of colliery is pressure device and super remote whitewashing system in pit, through setting up the steam heating device of specific structure, can produce a large amount of steam, satisfy gas supply equipment's gas supply demand, notice to heat the water to a higher temperature through water preheating tank, then spout from the shower head to the heating block after the heating, then can continuously produce a large amount of steam, then a large amount of steam that produces inhales in the gas mixing jar under gas supply equipment's negative pressure effect, and enter into gas supply equipment, produce the higher compressed gas of pressure under gas supply equipment's effect, and pressurize in pumping the presser with compressed gas, and the device has simple structure, low in manufacturing cost's characteristics. And the unvaporized water body can be recycled, the water consumption is minimized, and the water-saving effect is achieved.
This kind of colliery is pressure device and super far away whitewashing system for pit, when adjusting the temperature and the vapor concentration of the mist in being responsible for the air feed, open the second ooff valve on the gas release pipe simultaneously with first ooff valve closed, when the mist carries out temperature and vapor concentration and is in suitable numerical value, close the second ooff valve simultaneously with first ooff valve open, then go into the compressed gas that temperature and vapor concentration are in suitable numerical value to the presser internal pump.
This kind of pressurization device and super remote whitewashing system for colliery is in pit, the inside and junction with the intake pipe of pressurized tube is equipped with relative first wear-resisting pipe and the wear-resisting pipe of second that set up and be loudspeaker form, first wear-resisting pipe and the wear-resisting pipe of second set up inside the pressurized tube according to the precedence order of thick liquids transportation, and the outer tip diameter of the wear-resisting pipe of second is greater than the diameter of the outer tip of first wear-resisting pipe for in the pressurized tube from the first wear-resisting intraductal spun thick liquids of loudspeaker form can directly enter into the second wear-resisting intraductal of loudspeaker form, thereby avoided concrete thick liquids and exempted from concrete thick liquids and carried out the in-process that pressurizes under negative pressure and high-pressure gas promote at the pressurized tube, the collision that concrete thick liquids takes place with the junction of pressurized tube and intake pipe damages the presser, prolonged the life of violent presser.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a pressurization device and an ultra-long distance guniting system for a coal mine underground;
FIG. 2 is a schematic diagram showing the results of the pressurizing device and the pressurizer of the ultra-long distance guniting system for the underground coal mine according to the present invention;
FIG. 3 is a schematic view of a partial structure of a pressurization device and an ultra-long distance guniting system for a coal mine;
FIG. 4 is a schematic structural diagram of a pressurizing device for underground coal mine and a steam heating device of an ultra-long distance guniting system according to the invention;
FIG. 5 is a schematic structural diagram of a pressurization device for a coal mine underground and an air release pipe of an ultra-long distance guniting system according to the invention;
in the figure: 1. a feeding machine; 2. an injection machine; 3. a segmented multistage continuous pressurized pipeline; 4. a gas supply device; 5. a pressurizer; 6. a delivery conduit; 7. a pressurizing pipe; 8. an air inlet pipe; 9. a first wear resistant tube; 10. a second wear tube; 11. an intake gap; 12. a gas delivery pipe; 13. a steam heating device; 14. a gas delivery branch pipe; 15. a first on-off valve; 16. discharging the air pipe; 17. a barometer; 18. a steam generating tank; 19. a water body preheating tank; 20. a heat block; 21. resistance heating wires; 22. a steam conduit; 23. a shower head; 24. a water receiving cover; 25. a water conduit; 26. a delivery pump; 27. an air inlet; 38. a temperature sensor; 29. a steam concentration sensor; 30. a gas mixing tank; 32. an air filtration device; 33. an opening degree regulating valve; 34. a spray head; 35. a main gas supply pipe; 36. a delivery pump tube set; 37. and a second on-off valve.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1, 2, 3, 4 and 5, the pressurization device for the underground coal mine comprises an air supply device 4 and a conveying pipeline 6, wherein a plurality of pressurizers 5 are connected in series on the conveying pipeline 6; the gas supply device 4, the conveying pipeline 6 and the plurality of pressurizers 5 form a sectional type multistage continuous pressurizing pipeline 3, each pressurizer 5 comprises a pressurizing pipe 7, two ends of each pressurizing pipe 7 are connected with the conveying pipeline 6, an air inlet pipe 8 is arranged on each pressurizing pipe 7, a first wear-resistant pipe 9 and a second wear-resistant pipe 10 which are arranged oppositely and horn-shaped are arranged in the pressurizing pipe 7 and at the connection part of the pressurizing pipe 7 and the air inlet pipe 8, the first wear-resistant pipe 9 and the second wear-resistant pipe 10 are arranged in the pressurizing pipe 7 according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe 10 is larger than that of the first wear-resistant pipe 9, and an air inlet gap 11 for communicating the air inlet pipe 8 with the pressurizing pipe 7 is arranged between the first wear-resistant pipe 9 and the second wear-resistant pipe 10; the air supply equipment 4 is connected with the air inlet pipe 8 through an air delivery pipe 12; the air inlet end of the air supply device 4 is connected with a steam heating device 13;
the system also comprises a feeding machine 1 and an injection machine 2, wherein a discharge hole of the feeding machine 1 is connected with a hopper on the injection machine 2; the feeding end of the sectional type multistage continuous pressurizing pipeline is connected with the injection pipe of the injection machine 2, and the discharging end of the sectional type multistage continuous pressurizing pipeline 3 is connected with the spray head 4.
The pressurizing device for the underground coal mine and the use method of the ultra-long distance guniting system are characterized in that slurry is sent into a hopper on a sprayer 2 through a feeding machine 1, the sprayer 2 sprays the slurry into a sectional type multistage continuous pressurizing pipe 7, and multistage continuous pressurizing and conveying are carried out by utilizing a plurality of pressurizers 5 in the sectional type multistage continuous pressurizing pipe 7, so that concrete slurry can be subjected to the operation; the working mode of the sectional type multistage continuous pressurizing pipeline 7 is that the steam heating device 13 generates high-temperature steam, the high-temperature steam is introduced into the air inlet pipe 8 on the pressurizer 5 in a compressed state under the action of the air supply equipment 4 and enters the conveying pipeline 6, wherein compressed air entering from the air inlet pipe 8 forms a negative pressure environment in the conveying pipeline 6, slurry continues to advance along the conveying pipeline 6 under the pushing of negative pressure and high-pressure air, and the ultra-long distance transportation of the slurry is realized under the multistage pressurization of the plurality of pressurizers 5; wherein the slurry in the conveying pipeline 6 can be continuously humidified and heated by using the water vapor with higher temperature; the concrete slurry after being transported over a long distance is ensured to have higher temperature and humidity, so that the concrete slurry has higher strength after being solidified, a large amount of dust cannot be generated in the process of guniting, and the effect of inhibiting the dust is achieved; a first wear-resistant pipe 9 and a second wear-resistant pipe 10 which are oppositely arranged and horn-shaped are arranged in the pressurizing pipe 7 and at the connection part of the first wear-resistant pipe 9 and the air inlet pipe 8, the first wear-resistant pipe 9 and the second wear-resistant pipe 10 are arranged in the pressurizing pipe 7 according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe 10 is larger than that of the outer end part of the first wear-resistant pipe 9, and an air inlet gap 11 for communicating the air inlet pipe 8 and the pressurizing pipe 7 is arranged between the first wear-resistant pipe 9 and the second wear-resistant pipe 10; utilize first wear-resisting pipe 9 and second wear-resisting pipe 10 to have played the effect of crashproof abrasionproof to forcing pipe 7, avoid concrete thick liquids to carry out the pressurized in-process at forcing pipe 7 under negative pressure and high-pressure gas promote, concrete thick liquids take place violent collision with the junction of forcing pipe 7 and intake pipe 8 and damage presser 5, have reduced presser 5's life.
Wherein the first wear-resistant pipe 9 and the second wear-resistant pipe 10 are both made of wear-resistant alloy materials.
The gas pipe 12 comprises a gas supply main pipe 35 connected with the gas outlet end of the gas supply equipment 4, and the gas supply main pipe 35 is respectively connected with the gas inlet pipe 8 on each pressurizer 5 through a gas transmission branch pipe 14; a first switch valve 15 is arranged at one end of the conveying branch pipe 14 close to the air inlet pipe 8, an air discharging pipe 16 is arranged on the conveying branch pipe 14, and a second switch valve 37 is arranged on the air discharging pipe 16; the gas supply is responsible for and is equipped with barometer 17 on 35, is responsible for the gas supply and is being equipped with the temperature and the steam concentration of the mist in 35 when adjusting, opens the second ooff valve on the gas release 16 and closes first ooff valve 15 simultaneously, when the mist carries out temperature and steam concentration and is in suitable numerical value, closes the second ooff valve and opens first ooff valve 15 simultaneously, then pumps into the compressed gas that temperature and steam concentration are in suitable numerical value in pressurizer 5.
The steam heating device 13 comprises a steam generating tank 18 and a water body preheating tank 19, a conical heating block 20 is arranged in an inner cavity of the steam generating tank 18, a resistance heating wire 21 is arranged in the heating block 20, a steam outlet pipe 21 is arranged at the top of the steam generating tank 18, and the steam outlet pipe 21 is connected with the air inlet end of the air supply equipment 4 through a steam conduit 22; the top of the inner cavity of the steam generating tank 18 is provided with a spray header 23 facing the heating block 20, the bottom of the inner cavity of the steam generating tank 18 is provided with a water receiving cover 24, the water receiving cover 24 is connected with the water body preheating tank 19 through a water guide pipe 25, and the water guide pipe 13 is provided with a delivery pump 26; the middle part of the steam generating tank 18 is provided with an air inlet 27; the water body preheating tank 19 is communicated with a water channel of the spray header 23 through a conveying pump pipe group 36.
Wherein, the gas supply main pipe 35 is provided with a temperature sensor 28 and a steam concentration sensor 29.
The steam outlet pipe 21 is connected with a gas mixing tank 30, the gas mixing tank 30 is provided with an air inlet pipe 31, and the air inlet end of the air inlet pipe 31 is connected with an air filtering device 32; the air inlet pipe 31 is provided with an opening regulating valve 33, the steam heating device 13 is regulated before guniting, wherein the steam heating device 13 is regulated by firstly pumping the water preheated by the water preheating tank 19 into the spray header 23 through the delivery pump 26 pipe group and spraying the water into the heating block 20 from the spray header 23, then generating a large amount of water vapor under the action of the heating block 20, sucking the generated large amount of water vapor into the gas mixing tank 30 under the suction action of the air supply system and guiding the water vapor into the air supply main pipe 35, and respectively detecting the temperature, the water vapor concentration and the air pressure of the mixed gas in the air supply main pipe 35 by using the temperature sensor 38, the water vapor concentration sensor 29 and the air pressure gauge 17 on the air supply main pipe 35; when the temperature and the water vapor concentration of the gas are simultaneously too high, the opening regulating valve 33 on the air inlet pipe on the gas mixing tank 30 is opened, and then the outside air is synchronously sucked to mix the gas containing the water vapor with higher temperature, so that the effects of regulating the temperature and the water vapor concentration of the mixed gas in the gas supply main pipe 35 are achieved.
Through setting up the steam heating device 13 of specific structure, can produce a large amount of steam, satisfy the gas supply demand of air feeder 4, notice that heat the water to a higher temperature through water preheating tank 19, then spout to the heating block 20 after the heating from shower head 23, then can continuously produce a large amount of steam, then a large amount of steam that produces is inhaled in gas mixing tank 30 under the negative pressure effect of air feeder 4 in, and enter into air feeder 4, produce the higher compressed gas of pressure under the effect of air feeder 4, and pressurize in pumping compressed gas into presser 5, and the device has simple structure, low in manufacturing cost's characteristics. And the unvaporized water body can be recycled, the water consumption is minimized, and the water-saving effect is achieved.
The pressure pipe 7 is connected with the delivery pipeline 6 through a flange or a quick connector.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A pressure device for coal mine underground is characterized in that; comprises an air supply device (4) and a conveying pipeline (6), wherein a plurality of pressurizers (5) are connected in series on the conveying pipeline (6); the gas supply equipment (4), the conveying pipeline (6) and the plurality of pressurizers (5) form a sectional type multistage continuous pressurizing pipeline (3), the pressurizer (5) comprises a pressurizing pipe (7) with two ends connected with the conveying pipeline (6), an air inlet pipe (8) is arranged on the pressure pipe (7), a first wear-resistant pipe (9) and a second wear-resistant pipe (10) which are arranged oppositely and are horn-shaped are arranged in the pressure pipe (7) and at the joint of the pressure pipe and the air inlet pipe (8), the first wear-resistant pipe (9) and the second wear-resistant pipe (10) are arranged inside the pressurizing pipe (7) according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe (10) is larger than that of the outer end part of the first wear-resistant pipe (9), an air inlet gap (11) for communicating the air inlet pipe (8) and the pressurizing pipe (7) is arranged between the first wear-resistant pipe (9) and the second wear-resistant pipe (10); the air supply equipment (4) is connected with the air inlet pipe (8) through an air delivery pipe (12); and the air inlet end of the air supply equipment (4) is connected with a steam heating device (13).
2. An ultra-long distance guniting system, which is characterized by comprising the pressurizing device for the underground coal mine, a feeding machine (1) and an injection machine (2) as claimed in claim 1, wherein a discharge hole of the feeding machine (1) is connected with a hopper on the injection machine (2); the feeding end of the sectional type multistage continuous pressurizing pipeline is connected with an injection pipe of an injection machine (2), and the discharging end of the sectional type multistage continuous pressurizing pipeline (3) is connected with a spray head (4).
3. The ultra-long distance guniting system according to claim 2, wherein the gas conveying pipe (12) comprises a main gas supply pipe (35) connected with the gas outlet end of the gas supply equipment (4), and the main gas supply pipe (35) is respectively connected with the gas inlet pipe (8) on each pressurizer (5) through a gas conveying branch pipe (14); a first switch valve (15) is arranged at one end, close to the air inlet pipe (8), of the conveying branch pipe (14), an air discharging pipe (16) is arranged on the conveying branch pipe (14), and a second switch valve (37) is arranged on the air discharging pipe (16); and the air supply main pipe (35) is provided with an air pressure meter (17).
4. The ultra-long distance guniting system according to claim 3, wherein the steam heating device (13) comprises a steam generating tank (18) and a water body preheating tank (19), a conical heating block (20) is arranged in an inner cavity of the steam generating tank (18), a resistance heating wire (21) is arranged in the heating block (20), a steam outlet pipe (21) is arranged at the top of the steam generating tank (18), and the steam outlet pipe (21) is connected with the air inlet end of the air supply device (4) through a steam conduit (22); a spray header (23) facing the heating block (20) is arranged at the top of the inner cavity of the steam generating tank (18), a water receiving cover (24) is arranged at the bottom of the inner cavity of the steam generating tank (18), the water receiving cover (24) is connected with the water body preheating tank (19) through a water guide pipe (25), and a delivery pump (26) is arranged on the water guide pipe (13); the middle part of the steam generating tank (18) is provided with an air inlet hole (27); the water body preheating tank (19) is communicated with a water channel of the spray header (23) through a conveying pump pipe group (36).
5. The guniting system according to claim 3, wherein the gas supply main (35) is provided with a temperature sensor (28) and a steam concentration sensor (29).
6. The ultra-long distance guniting system according to claim 4, wherein a gas mixing tank (30) is connected to the steam outlet pipe (21), an air inlet pipe (31) is arranged on the gas mixing tank (30), and an air filtering device (32) is connected to an air inlet end of the air inlet pipe (31); an opening degree adjusting valve (33) is arranged on the air inlet pipe (31).
7. Ultra-long distance guniting system according to claim 1, wherein the pressurized pipe (7) is connected with the delivery pipe (6) via a flange or a quick-connect plug.
8. The ultra-long distance guniting system according to any one of claims 2-7, wherein the system is used by feeding the slurry into a hopper on an injection machine through a feeder, the injection machine injecting the slurry into a segmented multistage continuous pressurized pipeline, and the slurry is conveyed under pressure by a plurality of pressurizers in the segmented multistage continuous pressurized pipeline; the working mode of the sectional type multistage continuous pressurization pipeline is that the steam heating device generates high-temperature steam, the high-temperature steam is introduced into an air inlet pipe on the pressurizer in a compressed state under the action of air supply equipment and enters the conveying pipeline, wherein compressed air entering from the air inlet pipe enables a negative pressure environment to be formed in the conveying pipeline, slurry is pushed by negative pressure and high-pressure air to continue to advance along the conveying pipeline, and ultra-long-distance transportation of the slurry is realized under multistage pressurization of a plurality of pressurizers; the pressure pipe is characterized in that a first wear-resistant pipe and a second wear-resistant pipe which are arranged oppositely and horn-shaped are arranged in the pressure pipe and at the connection part of the pressure pipe and the air inlet pipe, the first wear-resistant pipe and the second wear-resistant pipe are arranged in the pressure pipe according to the sequence of slurry transportation, the diameter of the outer end part of the second wear-resistant pipe is larger than that of the outer end part of the first wear-resistant pipe, and an air inlet gap for communicating the air inlet pipe and the pressure pipe is formed between the first wear-resistant pipe and the second wear-resistant pipe.
9. The ultra-long distance guniting system according to claim 8, wherein: the method comprises the steps of firstly pumping a water body preheated by a water body preheating tank into a spray header through a conveying pump pipe group, spraying the water body into a heating block from the spray header, generating a large amount of water vapor under the action of the heating block, sucking the generated large amount of water vapor into a gas mixing tank under the suction action of a gas supply system, guiding the water vapor into a gas supply main pipe, and respectively detecting the temperature, the water vapor concentration and the air pressure of mixed gas in the gas supply main pipe by using a temperature sensor, a water vapor concentration sensor and an air pressure gauge on the gas supply main pipe; when the temperature and the water vapor concentration of the gas are simultaneously too high, the opening regulating valve on the air inlet pipe on the gas mixing tank is opened, and the outside air is synchronously sucked to mix the gas containing the water vapor with higher temperature, so that the effects of regulating the temperature and the water vapor concentration of the mixed gas in the gas supply main pipe are achieved; when the temperature and the water vapor concentration of the mixed gas in the gas supply main pipe are adjusted, the second switch valve on the gas release pipe is opened and the first switch valve is closed, when the temperature and the water vapor concentration of the mixed gas are in proper values, the second switch valve is closed and the first switch valve is opened, and then the compressed gas with the temperature and the water vapor concentration in proper values is pumped into the pressurizer.
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| CN202110283607.5A CN113153366A (en) | 2021-03-17 | 2021-03-17 | Pressurizing device and ultra-long distance guniting system for underground coal mine |
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| CN202110283607.5A CN113153366A (en) | 2021-03-17 | 2021-03-17 | Pressurizing device and ultra-long distance guniting system for underground coal mine |
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Cited By (1)
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| CN113605936A (en) * | 2021-08-26 | 2021-11-05 | 山东里能鲁西矿业有限公司 | Remote continuous guniting device for underground coal mine and guniting control method |
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Application publication date: 20210723 |