CN110778354A - Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device - Google Patents
Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device Download PDFInfo
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- CN110778354A CN110778354A CN201911093290.8A CN201911093290A CN110778354A CN 110778354 A CN110778354 A CN 110778354A CN 201911093290 A CN201911093290 A CN 201911093290A CN 110778354 A CN110778354 A CN 110778354A
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- 238000005187 foaming Methods 0.000 title claims abstract description 107
- 239000007788 liquid Substances 0.000 title claims abstract description 42
- 239000012530 fluid Substances 0.000 title claims abstract description 21
- 239000004088 foaming agent Substances 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 66
- 239000002184 metal Substances 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 26
- 239000010419 fine particle Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 26
- 238000002485 combustion reaction Methods 0.000 description 14
- 230000002269 spontaneous effect Effects 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 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
- 239000002817 coal dust Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Classifications
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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
- E21F5/06—Fluids used for spraying
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides a gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device, which comprises a double-layer pipeline; the double-layer pipeline comprises an outer layer pipe and an inner layer pipe; the inner layer pipe and the outer layer pipe are connected through a connecting rod to form a circular cavity; the inner layer pipe is used for conveying the foaming agent premix liquid, and the annular cavity is used for conveying gas; the output end of the inner-layer pipe is provided with an atomizing nozzle; the outer layer pipe is provided with a foaming net in the spraying direction of the atomizing nozzle. The atomizing nozzle is used for atomizing the premixed liquid containing the foaming agent into fine particles and spraying the fine particles onto the foaming net, the foaming net has high adsorbability on the atomized particles, and the atomized particles attached to the foaming net are foamed under the action of high-pressure gas conveyed through the annular cavity between the inner layer pipe and the outer layer pipe and are injected into a target area. The invention overcomes the defects that the downstream foam conveying pipeline has large on-way resistance loss, the pressure at the outlet of the tail end of the pipeline is small, the foam is easy to break, the final foaming effect is poor and the like when the traditional device is used for treating a high-position fire area.
Description
Technical Field
The invention relates to a foaming device, in particular to a gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device which is suitable for treating coal spontaneous combustion fire.
Background
A large amount of float coal is left in a goaf in the coal mining process, oxidation reaction occurs in the long-term contact process of the float coal and oxygen, heat is generated and gradually accumulated, spontaneous combustion occurs when the ignition point of coal is reached, and mine fires and coal field fires caused by the spontaneous combustion of the coal are main natural disasters in the coal mine field of China. Accident statistical data shows that more than 90% of mine fires in China are caused by spontaneous combustion of coal, more than 70% of large and medium-sized coal mines have coal bed spontaneous combustion danger, and the potential safety hazard of the mine caused by spontaneous combustion of the coal exceeds 4000 times every year, so that more than 360-time disasters are caused. The amount of coal directly burned due to fire in a coal field in China is more than 2000 million tons every year, and nearly 10 times of stagnant coal resources cannot be exploited. The coal spontaneous combustion fire not only burns a large amount of coal resources and destroys the local ecological environment, but also generates CO and SO in the combustion process
2And a large amount of toxic and harmful gas can seriously threaten the life safety of underground personnel. In addition, mine fires are easy to cause gas and coal dust explosion accidents, so that serious accidents of group death and group injury are caused, and the severe influence is generated on the stable and harmonious development of the society. Therefore, the treatment of the spontaneous combustion fire of the coal has very important significance for protecting coal resources and guaranteeing the safe production of mines.
The two-phase foam technology is used as an important method for extinguishing large-space hidden coal spontaneous combustion fire, is widely applied by the characteristics of large flow, high multiple and high accumulation, and treats a large number of mine fires and coal field fires. The preparation of the traditional mine fire prevention and extinguishing two-phase foam utilizes a special adding device to add a foaming agent into a water conveying pipeline, water and the foaming agent are mixed in an inflow mixer to form a premixed foam liquid and enter a turbine type or baffle type foaming device, a nitrogen (compressed air) pipeline is connected into the foaming device, the nitrogen (compressed air) and the premixed foam liquid containing the foaming agent interact to generate two-phase foam, and the formed two-phase foam is conveyed to a coal spontaneous combustion area through a pipeline under the action of water and air pressure to perform fire extinguishing operation. Because the downstream transportation pipeline of the foam has large on-way resistance loss, when the two-phase foam preparation method is used for treating the same horizontal fire area or a lower horizontal low-level fire area, a good fire extinguishing effect can be obtained, but when the two-phase foam preparation method is used for treating an upper horizontal high-level fire area, the foam can be broken under the action of gravity caused by on-way resistance and height difference, the pressure at the outlet at the tail end of the pipeline is also reduced rapidly, the final foaming effect is poor, the diffusion range is small, the stacking height is low, and the fire extinguishing effect is seriously influenced.
The terminal output state of foam is the key of guaranteeing fire extinguishing effect, when carrying out the fire extinguishing operation, should place the foam maker in the position that is nearest apart from coal spontaneous combustion district as far as possible, shortens the pipeline transport distance of foam, reduces the on-the-way resistance loss. However, in the current two-phase foam preparation process, liquid (premixed foam liquid formed by water and foaming agent) and gas (nitrogen or compressed air) respectively enter the foaming device through two pipelines, and the gas-liquid two-phase medium cannot be simultaneously conveyed to the foaming device through one pipeline in the drill hole, and the foaming device is large in size, and in an optimal state, the foaming device can only be placed in front of the drill hole and cannot go deep into the drill hole or even reach the coal spontaneous combustion area, so that the effect is poor when the high-position fire area is treated.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art, and provides a foaming device which can be arranged in a coal spontaneous combustion area, simultaneously conveys gas-liquid two-phase fluid through a pipeline in a drill hole, and can generate large-flow and high-multiple two-phase foam at the tail end of the pipeline.
In order to solve the technical problem, the gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device provided by the invention comprises a double-layer pipeline; the double-layer pipeline comprises an outer layer pipe and an inner layer pipe; the inner layer pipe and the outer layer pipe are connected through a connecting rod to form a circular cavity; the inner layer pipe is used for conveying the foaming agent premix liquid, and the annular cavity is used for conveying gas; the output end of the inner-layer pipe is provided with an atomizing nozzle; the outer layer pipe is provided with a foaming net in the spraying direction of the atomizing nozzle. The atomizing nozzle adopts a conical atomizing nozzle and is used for atomizing a premixed liquid containing a foaming agent into fine particles and spraying the fine particles onto the foaming net, the foaming net has high adsorbability on the atomized particles, and the atomized particles attached to the foaming net are foamed under the action of high-pressure gas conveyed through a circular cavity between the inner-layer pipe and the outer-layer pipe and are injected into a target area.
As an improvement, the material of the foaming net is cotton fiber, nylon, polyethylene, metal and the like, and the shape, the size and the depth of the mesh can be adjusted according to actual requirements such as on-site air pressure, water pressure and the like.
As an improvement, the outer layer pipe is also provided with a metal net I and a metal net II; the metal net I and the metal net II are arranged on two sides of the foaming net, and the metal net I, the foaming net and the metal net II are all parabolic. The metal net I and the metal net II mainly play a role in fixing and protecting the foaming net. The metal net I, the foaming net and the metal net II are all parabolic, so that wind resistance is reduced, and a foaming effect is guaranteed.
As an improvement, the double-layer pipeline is divided into an input section, a connecting section and a foaming section; the connecting section connects the input section and the foaming section. The device comprises an input section, a connecting section, a foaming section and a foaming section, wherein the input section is used for connecting gas, water and a foaming agent into the device, the connecting section is used for respectively conveying the premixed liquid containing the foaming agent and the gas to the foaming section, the length and the number of the connecting section can be flexibly adjusted according to field conditions, and the foaming section is used for foaming the premixed liquid containing the foaming agent under the action of high-pressure gas and injecting the foamed premixed liquid into a target area.
As an improvement, the input section comprises a flange connecting piece I and a flange connecting piece II; the flange connecting piece I is connected with the outer layer pipe and used for inputting gas to the outer layer pipe; the side surface of the outer layer pipe is provided with a hole, and the inner layer pipe extends out of the hole and is connected with a flange connecting piece II; and the flange connecting piece II is used for inputting a foaming agent and water and forming a foaming agent premix liquid.
As an improvement, the flange connecting piece I is provided with a valve I and a check valve; the flange connecting piece II is provided with a valve II and a valve III; the valve I is used for adjusting the gas flow; the valve II is used for adjusting the flow of the foaming agent; the valve III is used for adjusting water flow so as to ensure the optimal proportion and the foaming effect; the check valve is used for avoiding the damage of the gas supply equipment caused by the backflow of gas and water.
As a refinement, the input section comprises an orifice sealing tray; the orifice sealing tray is sleeved outside the outer-layer pipe, and a sealing hole I and a sealing hole II are formed in the orifice sealing tray. The orifice sealing tray is used for sealing the drill hole. When the device is used, the foaming section, the connecting section and the input section are sequentially inserted into a drill hole, the orifice sealing tray is placed at the orifice of the drill hole, and plugging materials are injected into a gap between the drill hole and the device through the sealing hole I and the sealing hole II to perform hole sealing operation.
As improvement, the input section comprises a quick male connector I, an annular groove I, an internal thread I, a sealing washer I and a sealing washer I; the connecting section comprises an external thread I, a quick female joint I and an annular groove III; the inner pipe of the connecting section is connected with the inner pipe of the input section through a quick female connector I and a quick male connector I, and when the inner pipe of the connecting section is connected with the inner pipe of the input section, a sealing washer I and a sealing washer I which are nested in the input section of the annular groove I enter an annular groove III to seal the foaming agent premix in the inner pipe; the outer layer pipe of the connecting section is connected with the outer layer pipe of the input section in a screwing mode through the external thread I and the internal thread I.
As an improvement, the connecting section comprises a quick male connector II, an annular groove II, an internal thread II, a sealing washer II and a sealing washer II; the foaming section comprises an external thread II, a quick female joint II and an annular groove IV; the inner pipe of the foaming section is connected with the inner pipe of the connecting section through a quick female connector II and a quick male connector II, and a sealing washer II which are nested in the annular groove II enter the annular groove IV during connection; the outer layer pipe of the foaming section is connected with the outer layer pipe of the connecting section in a screwing mode through the external thread II and the internal thread II.
The invention also provides a method for realizing the net type foaming of the tail end of the gas-liquid two-phase fluid double-layer pipeline transportation by using the device, which comprises the following steps:
a. after the fire extinguishing drill hole is formed, firstly, a foaming section is inserted into the drill hole, and the quick female joint II is reserved outside the drill hole;
b. inserting the quick male connector II of the connecting section into the quick female connector II of the foaming section, simultaneously screwing the internal thread II of the connecting section into the external thread II of the foaming section, realizing the connection between the inner-layer pipe and the outer-layer pipe of the foaming section and the inner-layer pipe and the outer-layer pipe of the connecting section respectively, then continuing to insert the connecting section into the drilled hole, and keeping the quick female connector I of the connecting section outside the drilled hole;
c. determining the number of the connecting sections according to the length of the drilled hole, connecting all the connecting sections end to end through respective quick male connectors II and quick female connectors I, and keeping the quick female connector I of the last connecting section outside the drilled hole;
d. inserting the quick male connector I of the input section into the quick female connector I of the connecting section, simultaneously screwing the internal thread I of the input section into the external thread I of the connecting section, realizing the connection of the inner-layer pipe and the outer-layer pipe of the input section with the inner-layer pipe and the outer-layer pipe of the connecting section respectively, and then inserting the input section into a drill hole until the orifice sealing tray is positioned at the orifice;
e. injecting plugging materials into a gap between the drill hole and the device through the sealing hole I and the sealing hole II to seal the drill hole, so that foam backflow in the foam injection process is prevented;
f. the air source is connected through the flange connecting piece I, the foaming agent and the water source are connected through the flange connecting piece II, the flow rates of the air, the foaming agent and the water are respectively adjusted through the valve I, the valve II and the valve III, the foaming effect and the fire extinguishing effect of the terminal are observed in the filling process, and the adjustment is carried out in time to ensure the optimal ratio and the foaming effect;
g. moving to the next drilling hole, and repeating the processes from the step a to the step f.
The invention has the following beneficial effects: the gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device provided by the invention can be used for synchronously transporting gas-liquid two-phase fluid through one pipeline in a drill hole, and the device can be directly distributed in a coal self-ignition region; the net type foaming device is arranged at the tail end of the pipeline, so that large-flow and high-multiple two-phase foam can be generated, and the defects that the downstream foam transportation pipeline has large on-way resistance loss, the pressure at the outlet of the tail end of the pipeline is small, the foam is easy to break, the final foaming effect is poor, the diffusion range is small, and the stacking height is low when the traditional fire prevention and extinguishing two-phase foam preparation device is used for governing a high-position fire area are overcome. Generally, the fire extinguishing device is simple in structure and convenient and fast to operate, and can remarkably improve fire extinguishing efficiency, shorten fire extinguishing period and save fire extinguishing cost.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of the input section structure of the present invention;
FIG. 2 is a partial enlarged view of an input segment quick male connector I of the present invention
FIG. 3 is a cross-sectional view A-A' of FIG. 1;
FIG. 4 is a cross-sectional view B-B' of FIG. 1;
FIG. 5 is a schematic view of the connecting rod structure of the present invention;
FIG. 6 is a schematic view of a connector segment of the present invention;
FIG. 7 is a schematic structural view of a foam stage of the present invention;
wherein: 1-an input section, 2-a connecting section, 3-a foaming section, 4-a flange connector I, 5-a valve I, 6-a check valve, 7-a valve II, 8-a valve III, 9-a flange connector II, 10-an outer pipe, 11-an inner pipe, 12-an orifice sealing tray, 13-a sealing hole I, 14-a sealing hole II, 15-a connecting rod, 16-1-a quick male connector I, 16-2-a quick male connector II, 17-1-an annular groove I, 17-2-an annular groove II, 18-1-an internal thread I, 18-2-an internal thread II, 19-1-a sealing gasket I, 19-2-a sealing gasket II, 20-1-a sealing gasket I, 20-2-a sealing gasket II, 21-1-external thread I, 21-2-external thread II, 22-1-quick female joint I, 22-2-quick female joint II, 23-1-annular groove III, 23-2-annular groove IV, 24-conical atomizing nozzle, 25-metal net I, 26-foaming net and 27-metal net II.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
As shown in fig. 1, 6 and 7, the gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device comprises a double-layer pipeline; the double-layer pipeline is divided into an input section 1, a connecting section 2 and a foaming section 3; the double-layer pipeline comprises an outer layer pipe 10 and an inner layer pipe 11; the inner layer pipe 11 and the outer layer pipe 10 are connected through a connecting rod 15 to form a circular cavity. The input section 1 is used for connecting gas, water and a foaming agent into the device, the connecting section 2 is connected with the input section 1 and the foaming section 3, the premixed liquid containing the foaming agent and the gas are respectively conveyed to the foaming section 3, the length and the number of the connecting section 2 can be flexibly adjusted according to field conditions, and the foaming section 3 is used for foaming the premixed liquid containing the foaming agent under the action of high-pressure gas and injecting the foamed premixed liquid into a target area. The connection between the input section 1, the connection section 2 and the foaming section 3 is realized by a thread and a quick coupling, the interconnection of the inner layer pipes 11 is realized by inserting a quick male coupling into a quick female coupling, and the outer layer pipes 10 are screwed in through an internal thread and an external thread.
Gas is connected into the input section 1 through a flange connecting piece I4, and foaming agent and water are connected into the input section 1 through a flange connecting piece II 9.
Valve I5, valve II 7 and valve III 8 are used for adjusting the flow of gas, foamer and water respectively to guarantee best ratio and foaming effect, and check valve 6 is used for avoiding the gas supply equipment damage that gas, water backward flow lead to.
The orifice sealing tray 12 is provided with a sealing hole I13 and a sealing hole II 14; the orifice sealing tray 12 is used for sealing a drilled hole, when the orifice sealing tray is used, the foaming section 3, the connecting section 2 and the input section 1 are sequentially inserted into the drilled hole, the orifice sealing tray 12 is placed at the orifice of the drilled hole, and plugging materials are injected into a gap between the drilled hole and the device through the sealing hole I13 and the sealing hole II 14 to perform hole sealing operation.
The inner pipe 11 of the input section 1 is connected with the inner pipe 11 of the connecting section 2 through a quick male connector I16-1 and a quick female connector I22-1 of the connecting section 2, an annular groove I17-1 is formed in the quick male connector I16-1, and a sealing washer I19-1 and a sealing washer I20-1 are nested in the annular groove I17-1 and used for sealing premixed liquid containing foaming agents. The outer layer pipe 10 of the input section 1 is screwed with the outer layer pipe 10 of the connecting section 2 through the internal thread I18-1 and the external thread I21-1 of the connecting section 2.
The connecting section 2 comprises a quick male connector II 16-2, an annular groove II 17-2, an internal thread II 18-2, a sealing washer II 19-2, a sealing washer II 20-2, an external thread I21-1, a quick female connector I22-1 and an annular groove III 23-1. The inner pipe 11 of the connecting section 2 is connected with the inner pipe 11 of the input section 1 through a quick female connector I22-1 and a quick male connector I16-1 of the input section 1, when the connecting section is connected, a sealing washer I19-1 and a sealing washer I20-1 of the input section 1 which are nested in an annular groove I17-1 enter the annular groove III 23-1, and a premixed liquid containing a foaming agent in the inner pipe 11 is sealed. The outer layer pipe 10 of the connecting section 2 is screwed with the outer layer pipe 10 of the input section 1 through the external thread I21-1 and the internal thread I18-1 of the input section 1.
The foaming section 3 comprises external threads II 21-2, a quick female joint II 22-2, an annular groove IV 23-2, an atomizing spray head 24, a metal net I25, a foaming net 26 and a metal net II 27. The inner pipe 11 of the foaming section 3 is connected with the inner pipe 11 of the connecting section 2 through a quick female connector II 22-2 and a quick male connector II 16-2 of the connecting section 2, when the inner pipe is connected, a sealing washer II 19-2 and a sealing washer II 20-2 which are nested in an annular groove II 17-2 of the connecting section 2 enter the annular groove IV 23-2, a premixed liquid containing a foaming agent in the inner pipe 11 is sealed, and the outer pipe 10 of the foaming section 3 is screwed in and connected with the outer pipe 10 of the connecting section 2 through an external thread II 21-2 and an internal thread II 18-2 of the connecting section 2.
The foaming net 26 is arranged in the spraying direction of the atomizing nozzle 24; the atomizing nozzle 24 is a conical atomizing nozzle for atomizing a pre-mixed liquid containing a foaming agent into fine particles and spraying the fine particles onto the foaming net 26, the foaming net 26 is a cotton web, has high adsorbability to the atomized particles, and the atomized particles attached to the foaming net 26 are foamed under the action of high-pressure gas transported through the annular cavity between the inner layer tube 11 and the outer layer tube 10 and are injected into a target area. The metal net I25 and the metal net II 27 are positioned on two sides of the foaming net 26 and mainly used for fixing and protecting the foaming net 26. The metal net I25, the foaming net 26 and the metal net II 27 are all parabolic, so that wind resistance is reduced, and the foaming effect is guaranteed. The mesh size of the foaming net 26 is determined according to the air pressure and water pressure conditions on site.
The method for realizing the net type foaming of the tail end of the gas-liquid two-phase fluid double-layer pipeline transportation by utilizing the device comprises the following steps:
a. after the fire extinguishing drill hole is formed, firstly, the foaming section 3 is inserted into the drill hole, and the quick female joint II 22-2 is reserved outside the drill hole;
b. inserting the quick male connector II 16-2 of the connecting section 2 into the quick female connector II 22-2 of the foaming section 3, simultaneously screwing the internal thread II 18-2 of the connecting section 2 into the external thread II 21-2 of the foaming section 3, realizing the connection between the inner layer pipe 11 and the outer layer pipe 10 of the foaming section 3 and the inner layer pipe 11 and the outer layer pipe 10 of the connecting section 2 respectively, then continuing to insert the connecting section 2 into the drilled hole, and keeping the quick female connector I22-1 of the connecting section 2 outside the drilled hole;
c. determining the number of the connecting sections 2 according to the length of the drilled hole, connecting all the connecting sections 2 end to end through respective quick male connectors II 16-2 and quick female connectors I22-1, and keeping the quick female connectors I22-1 of the last connecting section 2 outside the drilled hole;
d. inserting the quick male connector I16-1 of the input section 1 into the quick female connector I22-1 of the connecting section 2, simultaneously screwing the internal thread I18-1 of the input section 1 into the external thread 21-1 of the connecting section 2, realizing the connection of the inner layer pipe 11 and the outer layer pipe 10 of the input section 1 with the inner layer pipe 11 and the outer layer pipe 10 of the connecting section 2 respectively, and then inserting the input section 1 into a drill hole until the hole opening sealing tray 12 is positioned at the hole opening;
e. plugging materials are injected into a gap between the drill hole and the device through the sealing hole I13 and the sealing hole II 14 to seal the drill hole, so that foam backflow in the foam injection process is prevented;
f. an air source is connected through a flange connecting piece I4, a foaming agent and a water source are connected through a flange connecting piece II 9, the flow rates of the air, the foaming agent and the water are respectively regulated through a valve I5, a valve II 7 and a valve III 8, the foaming effect and the fire extinguishing effect of a terminal are observed in the filling process, and the adjustment is timely carried out to ensure the optimal ratio and the foaming effect;
g. moving to the next drilling hole, and repeating the processes from the step a to the step f.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device is characterized in that: comprises a double-layer pipeline; the double-layer pipeline comprises an outer layer pipe (10) and an inner layer pipe (11); the inner layer pipe (11) and the outer layer pipe (10) are connected through a connecting rod (15) to form a circular cavity; the inner layer pipe (11) is used for conveying a foaming agent premix liquid, and the annular cavity is used for conveying gas; the output end of the inner-layer pipe (11) is provided with an atomizing nozzle (24); the outer layer pipe (11) is provided with a foaming net (26) in the spraying direction of the atomizing nozzle (24).
2. The gas-liquid two-phase fluid double-layer pipeline transportation tail end mesh type foaming device according to claim 1, characterized in that: the material of the foaming net (26) is cotton fiber, nylon, polyethylene or metal.
3. The gas-liquid two-phase fluid double-layer pipeline transportation tail end mesh type foaming device according to claim 1, characterized in that: the outer layer pipe (11) is also provided with a metal mesh I (25) and a metal mesh II (27); the metal net I (25) and the metal net II (27) are arranged on two sides of the foaming net (26); the metal net I (25), the foaming net (26) and the metal net II (27) are all parabolic.
4. The gas-liquid two-phase fluid double-layer pipeline transportation end mesh type foaming device according to any one of claims 1 to 3, wherein: the double-layer pipeline is divided into an input section (1), a connecting section (2) and a foaming section (3); the connecting section (2) is connected with the input section (1) and the foaming section (3); the connecting sections (2) are one or more.
5. The gas-liquid two-phase fluid double-layer pipeline transportation tail end mesh type foaming device according to claim 4, characterized in that: the input section (1) comprises a flange connecting piece I (4) and a flange connecting piece II (9); the flange connecting piece I (4) is connected with the outer layer pipe (10); the side surface of the outer layer pipe (10) is provided with a hole, and the inner layer pipe (11) extends out from the hole and is connected with the flange connecting piece II (9).
6. The gas-liquid two-phase fluid double-layer pipeline transportation tail end mesh type foaming device according to claim 5, characterized in that: the flange connecting piece I (4) is provided with a valve I (5) and a check valve (6); and the flange connecting piece II (9) is provided with a valve II (7) and a valve III (8).
7. The gas-liquid two-phase fluid double-layer pipeline transportation tail end mesh type foaming device according to claim 4, characterized in that: the input section (1) comprises an orifice sealing tray (12); the orifice sealing tray (12) is sleeved on the outer layer pipe (10), and a sealing hole I (13) and a sealing hole II (14) are arranged on the orifice sealing tray (12).
8. The gas-liquid two-phase fluid double-layer pipeline transportation end mesh type foaming device according to any one of claims 5 to 7, wherein: the input section (1) comprises a quick male connector I (16-1), an annular groove I (17-1), an internal thread I (18-1), a sealing washer I (19-1) and a sealing washer I (20-1); the connecting section (2) comprises an external thread I (21-1), a quick female joint I (22-1) and an annular groove III (23-1); the inner pipe (11) of the connecting section (2) is connected with the inner pipe (11) of the input section (1) through a quick female connector I (22-1) and a quick male connector I (16-1), and when the inner pipe is connected, a sealing washer I (19-1) and a sealing washer I (20-1) which are nested in an annular groove I (17-1) enter an annular groove III (23-1); the outer layer pipe (10) of the connecting section (2) is connected with the outer layer pipe (10) of the input section (1) in a screwing mode through an external thread I (21-1) and an internal thread I (18-1).
9. The gas-liquid two-phase fluid double-layer pipeline transportation end mesh type foaming device according to claim 8, wherein: the connecting section (2) further comprises a quick male connector II (16-2), an annular groove II (17-2), an internal thread II (18-2), a sealing washer II (19-2) and a sealing washer II (20-2); the foaming section (3) comprises an external thread II (21-2), a quick female joint II (22-2) and an annular groove IV (23-2); the inner pipe (11) of the foaming section (3) is connected with the inner pipe (11) of the connecting section (2) through a quick female connector II (22-2) and a quick male connector II (16-2), and when the inner pipe is connected, a sealing washer II (19-2) and a sealing washer II (20-2) which are nested in an annular groove II (17-2) enter an annular groove IV (23-2); the outer layer pipe (10) of the foaming section (3) is connected with the outer layer pipe (10) of the connecting section (2) in a screwing mode through the external thread II (21-2) and the internal thread II (18-2).
10. A method for realizing end net type foaming of gas-liquid two-phase fluid double-layer pipeline transportation based on the device of claim 9, which is characterized by comprising the following steps:
a. after the fire extinguishing drill hole is formed, firstly, a foaming section (3) is inserted into the drill hole, and a quick female joint II (22-2) is reserved outside the drill hole;
b. inserting the quick male connector II (16-2) of the connecting section (2) into the quick female connector II (22-2) of the foaming section (3), simultaneously screwing the internal thread II (18-2) of the connecting section (2) into the external thread II (21-2) of the foaming section (3), realizing the connection of the inner layer pipe (11) and the outer layer pipe (10) of the foaming section (3) with the inner layer pipe (11) and the outer layer pipe (10) of the connecting section (2) respectively, then continuing to insert the connecting section (2) into the drilled hole, and keeping the quick female connector I (22-1) of the connecting section (2) outside the drilled hole;
c. determining the number of the connecting sections (2) according to the length of the drilled hole, connecting all the connecting sections (2) end to end through respective quick male connectors II (16-2) and quick female connectors I (22-1), and keeping the quick female connectors I (22-1) of the last connecting section (2) outside the drilled hole;
d. inserting a quick male connector I (16-1) of an input section (1) into a quick female connector I (22-1) of a connecting section (2), simultaneously screwing an internal thread I (18-1) of the input section (1) into an external thread I (21-1) of the connecting section (2), realizing the connection of an inner layer pipe (11) and an outer layer pipe (10) of the input section (1) with the inner layer pipe (11) and the outer layer pipe (10) of the connecting section (2) respectively, and then inserting the input section (1) into a drill hole until an orifice sealing tray (12) is positioned at the orifice;
e. injecting plugging materials into a gap between the drill hole and the device through the sealing hole I (13) and the sealing hole II (14) to seal the drill hole;
f. insert the air supply through flange joint spare I (4), insert foaming agent and water source in flange joint spare II (9), adjust the flow of gas, foaming agent and water respectively through valve I (5), valve II (7) and valve III (8), notice observation terminal foaming effect and fire control effect filling the in-process, in time adjust in order to guarantee best ratio and foaming effect.
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| CN202210098047.0A CN114396304A (en) | 2019-11-11 | 2019-11-11 | Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device |
| CN201911093290.8A CN110778354A (en) | 2019-11-11 | 2019-11-11 | Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device |
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| CN201911093290.8A CN110778354A (en) | 2019-11-11 | 2019-11-11 | Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device |
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| CN111852351A (en) * | 2020-06-23 | 2020-10-30 | 肖云东 | Oil field special buckle oil pipe short joint |
| CN114396304A (en) * | 2019-11-11 | 2022-04-26 | 中国矿业大学 | Gas-liquid two-phase fluid double-layer pipeline transportation tail end net type foaming device |
Families Citing this family (1)
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| CN117686157B (en) * | 2024-02-04 | 2024-04-26 | 武汉特种工业泵厂有限公司 | Air tightness detection method for vacuum pump assembly line |
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| CN114396304A (en) | 2022-04-26 |
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