CN108561176A - A kind of mash gas pumping drilling automatic sparse blocks up permeability improvement device and method - Google Patents
A kind of mash gas pumping drilling automatic sparse blocks up permeability improvement device and method Download PDFInfo
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- CN108561176A CN108561176A CN201810286216.7A CN201810286216A CN108561176A CN 108561176 A CN108561176 A CN 108561176A CN 201810286216 A CN201810286216 A CN 201810286216A CN 108561176 A CN108561176 A CN 108561176A
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- pneumatic operated
- operated valve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
A kind of stifled permeability improvement device of mash gas pumping drilling automatic sparse, including extraction pipeline, air supply pipeline, adjusting pipeline, pressure control pneumatic operated valve and pressure piping, extraction pipeline include drainage tube and exhaust pipe in hole, exhaust pipe is equipped with the first pneumatic operated valve；The first shut-off valve, the second pneumatic operated valve and the first check valve are equipped in air supply pipeline successively, the first check valve is connect with drainage tube in hole；The both ends for adjusting pipeline are connect with the first shut-off valve and the first pneumatic operated valve respectively, regulation pipe road is equipped with the second shut-off valve and third pneumatic operated valve successively, third pneumatic operated valve is located at the end for adjusting pipeline, the unlatching control piper and closing control pipeline of first pneumatic operated valve are connect with third pneumatic operated valve respectively, and the unlatching control piper and closing control pipeline of the second pneumatic operated valve are connect with the unlatching control piper of the closing control pipeline of the first pneumatic operated valve and the first pneumatic operated valve respectively；Pressure piping both ends are connect with adjusting pipeline and air supply pipeline respectively.
Description
Technical field
The present invention relates to dredging for gas pumping field more particularly to coal mine underground coal bed mash gas pumping drilling is stifled anti-reflection.
Background technology
Coal bed gas extraction is the important technical for preventing mine gas accident, ensureing mine safety production, in protrusion
It is widely applied in mine and highly gassy mine.Gas pumping is also to obtain clean energy resource, increase energy resource supply, subtract simultaneously
The important measure of few environmental pollution.It is significant to improve gas pumping effect.
China major part mining area gas permeability of coal seam is low, belongs to and is difficult to extraction coal seam and compared with hard-pumped mining coal seam, extraction borehole is applied
After work, extraction borehole gas flow, gas density decaying are fast, and gas pumping effect is poor.In order to improve watt of low air permeability coal seam
This extracting result, experts and scholars have developed a variety of technological means for improving gas permeability of coal seam and extracting result, and summing up can
To be divided into two major classes, the first kind --- it is pressurized anti-reflection measure, such as hydraulic fracturing, carbon dioxide phase transformation split blasting, deep hole presplitting
Explosion etc., by high-energy, heavily stressed action breaks down coal body, structure crack passage improves gas permeability of coal seam；Second class ---
Measure that release is anti-reflection, such as hydraulic slotted liner technique, hydraulic flushing in hole are answered with reducing by the way that the coal body around extraction borehole is removed reaming
Power improves gas permeability of coal seam.These measures are applied in different mines respectively.
Field application experience have shown that, not only quantities is big, of high cost for above-mentioned measure, and after taking above-mentioned anti-reflection measure,
It is with obvious effects to improving extraction borehole initial operating stage gas flow, gas density, but extraction borehole runs to the later stage, due to gas
The closure of flow channel, still the problem of unavoidable gas flow, gas density decaying, the function of extraction drilling fails fully
It plays a role.
It is asked for gas flow, gas density decaying etc. existing for low air permeability coal seam and extraction borehole operation later stage
Topic, the quasi- pressure release failure mechanism according to gassiness porous media of the present invention propose that a kind of coal bed gas extraction drilling automatic sparse is stifled and increase
Saturating method and apparatus, it is empty full of the compression equal with underground pressure air system pressure first in extraction borehole using special arrangement
Gas, then be filled with the high pressure air in air accumulator in extraction borehole repeatedly by aerodynamic force unit, when in extraction borehole
After compressed air reaches certain pressure value, unexpected pressure release discharges high pressure gas, is bored to extraction by supercharging-pressure release of compressed air
The repeated action of hole drainage tube gas collecting segment and extraction borehole side wall coal body realizes the broken of coal body, the extension in crack, coal beans
The carrying of powder achievees the purpose that dredge gas crack passage, increases coal body gas permeability, improves the gas pumping effect of extraction borehole
Fruit.
Invention content
In view of the deficiencies in the prior art, it is stifled that the purpose of the present invention is to provide a kind of mash gas pumping drilling automatic sparses
Permeability improvement device and method dredge gas crack passage, increase coal body gas permeability, improve gas pumping effect.
To achieve the above object, the technical solution adopted by the present invention is：A kind of mash gas pumping drilling automatic sparse blocks up anti-reflection dress
It sets, including extraction pipeline, air supply pipeline, adjusting pipeline, pressure control pneumatic operated valve and pressure piping, extraction pipeline include drainage tube in hole
And exhaust pipe, exhaust pipe are equipped with the first pneumatic operated valve；The first shut-off valve, the second pneumatic operated valve and first are equipped in air supply pipeline successively
Check valve, the first check valve are connect with drainage tube in hole；Adjust pipeline both ends respectively with the first shut-off valve and the first pneumatic operated valve
Connection, regulation pipe road are equipped with the second shut-off valve and third pneumatic operated valve successively, and third pneumatic operated valve is located at the end for adjusting pipeline, the
The unlatching control piper and closing control pipeline of one pneumatic operated valve are connect with third pneumatic operated valve respectively, the unlatching control of the second pneumatic operated valve
Pipeline and closing control pipeline connect with the unlatching control piper of the closing control pipeline of the first pneumatic operated valve and the first pneumatic operated valve respectively
It connects；Pressure piping both ends respectively with adjust pipeline and air supply pipeline and connect, pressure piping with adjust the tie point of pipeline positioned at the
Between two shut-off valves and the first shut-off valve, the tie point of pressure piping and air supply pipeline is located at the first check valve and drainage tube in hole
Between, and pressure piping and the tie point of air supply pipeline are connect with third pneumatic operated valve, are equipped with booster pump, storage on pressure piping successively
Gas tank and the 4th pneumatic ball valve, the 4th pneumatic ball valve are opened control piper and closing control pipeline and are connected respectively with pressure control pneumatic operated valve
It connects, pressure control pneumatic operated valve is by the closing control piping connection of the first connecting line and the first pneumatic operated valve, and on the first connecting line
Equipped with the second check valve, pressure control pneumatic operated valve is connect by the second connecting line with pressure piping, and the second connecting line and supercharging
The tie point of pipeline is between air accumulator and the 4th pneumatic ball valve；Second shut-off valve is pneumatic by third connecting line and second
The closing control piping connection of the closing control pipeline and the 4th pneumatic ball valve of valve, it is unidirectional that third connecting line is equipped with third
Valve, and third check valve be located at third connecting line and the second pneumatic operated valve closing control piping connection point and third connecting line with
Between 4th pneumatic ball valve closing control piping connection point；When third pneumatic operated valve is closed, pipeline and the first pneumatic operated valve are adjusted
The unlatching control piper of closing control pipeline and the second pneumatic operated valve is connected to, and when third pneumatic operated valve is opened, adjusts pipeline and first
The closing control pipeline connection of the unlatching control piper and the second pneumatic operated valve of pneumatic operated valve, third pneumatic operated valve are normally off；When
When two shut-off valves are opened, the second shut-off valve is connected to third pneumatic operated valve, when the second shut-off valve is closed, the second shut-off valve and first
The closing control pipeline connection of the unlatching control piper and the second pneumatic operated valve of pneumatic operated valve, the second shut-off valve are in normally open；When
When pressure control pneumatic operated valve is closed, the closing control pipeline of the closing control pipeline and the 4th pneumatic ball valve of the first pneumatic operated valve
Access is constituted, when pressure control pneumatic operated valve is opened, the unlatching control of the closing control pipeline and the 4th pneumatic ball valve of the first pneumatic operated valve
Pipeline constitutes access, and pressure control pneumatic operated valve is in normally off.
Drainage tube is connected with exhaust pipe by quick coupling in the hole.
The exhaust pipe is equipped with first pressure gauge.
Regulation pipe road is equipped with filtering pressure regulation oil sprayer combined mechanism, and filtering pressure regulation oil sprayer combined mechanism is located at the
Between one shut-off valve and booster pump.
First pneumatic operated valve is pneumatic butterfly shut-off valve, and the first shut-off valve is manual ball check valve, the second pneumatic operated valve
For pneumatic 2/2-way valve, third pneumatic operated valve is pneumatic two five-way valves, and the second shut-off valve is manual two five-way valves, pressure control gas
Dynamic valve is pneumatic two five-way valves.
The pressure piping is equipped with second pressure gauge.
The pressure piping is equipped with relief valve, and relief valve is hand stop valve.
A kind of stifled anti-reflection method of mash gas pumping drilling automatic sparse, it is characterised in that include the following steps：
（1）Air supply pipeline front end is connect to underground pressure air device and is opened the first shut-off valve, a part of gas enters regulation pipe
Lu Zhong, another part gas enter in pressure piping；
（2）Third pneumatic operated valve is triggered into the gas adjusted in pipeline, adjusts the closing control pipeline of pipeline and the first pneumatic operated valve
It is connected to the unlatching control piper of the second pneumatic operated valve, to close the first pneumatic operated valve, opens the second pneumatic operated valve；
（3）After second pneumatic operated valve is opened, the wind of underground pressure air device discharge passes through in drainage tube in air supply pipeline access aperture；
（4）Gas in pressure piping is delivered in air accumulator and constantly pressurizes by booster pump, air accumulator, pressure control pneumatic operated valve and
The closing control pipeline of four pneumatic ball valves constitutes access, and the 4th pneumatic ball valve is closed；
（5）When the gas pressure value in air accumulator is more than the operating pressure value of pressure control pneumatic operated valve, pressure control pneumatic operated valve is opened, and first
The closing control pipeline of pneumatic operated valve and the unlatching control piper of the 4th pneumatic ball valve constitute access, and the 4th pneumatic ball valve, which is in, to be opened
State, pressure piping constitute access with drainage tube in hole, and the high pressure gas in air accumulator is discharged into hole in drainage tube；
（6）When gas in air accumulator is less than the operating pressure value of pressure control pneumatic operated valve by discharging its pressure value, pressure control pneumatic operated valve
It closes, the closing control pipeline of the first pneumatic operated valve and the closing control pipeline of the 4th pneumatic ball valve constitute access, the 4th Pneumatic ball
Valve is closed, and the gas in pressure piping is delivered in air accumulator and continues to pressurize by booster pump；
（7）Repeat step（4）To step（6）, when the gas pressure value in drainage tube in hole reaches the action pressure of third pneumatic operated valve
When force value, the closing control pipeline connection of the unlatching control piper and the second pneumatic operated valve of pipeline and the first pneumatic operated valve is adjusted, to
It opens the first pneumatic operated valve, closes the second pneumatic operated valve, the gas in hole in drainage tube is discharged rapidly from exhaust pipe；
（8）When the gas pressure value in drainage tube in hole is less than the operating pressure value of third pneumatic operated valve, third pneumatic operated valve resets,
It adjusts pipeline to be connected to the unlatching control piper of the closing control pipeline of the first pneumatic operated valve and the second pneumatic operated valve, to close first
Pneumatic operated valve opens the second pneumatic operated valve；
（9）Step is repeated several times（2）To step（8）, until being discharged from exhaust pipe without coal dust in drainage tube in hole；
（10）Manually adjust the second shut-off valve, the unlatching control piper and the second pneumatic operated valve of underground pressure air device and the first pneumatic operated valve
Closing control pipeline connection close the second pneumatic operated valve to open the first pneumatic operated valve, the gas in hole in drainage tube is from exhaust
Pressure release is discharged in pipe, finally closes the first shut-off valve.
The operating pressure value of the pressure control pneumatic operated valve is 1.6MPa.
The operating pressure value of the third pneumatic operated valve is 0.6 MPa.
Present invention drainage tube conveying high-pressure gas into hole in pressure release by air accumulator, high pressure gas is by drainage tube in hole
It is erupted into gas pumping hole, to being fixedly arranged at the tamper of extraction borehole drainage tube gas collecting segment（First of isolated screen）It is impacted
It is broken；The intermittence for adjusting high pressure gas in the variation control air accumulator that pipeline and pressure control pneumatic operated valve pass through gas storage pressure inside the tank is let out
Pressure realizes the tamper to extraction borehole drainage tube gas collecting segment（First of isolated screen）It is broken to carry out repeat impact, and in hole
Gas in drainage tube opens the first pneumatic operated valve after reaching certain pressure value, and throwing open for the first pneumatic operated valve can cause extraction to bore
It is broken to carry out tearing to the tamper of extraction borehole drainage tube gas collecting segment for the unexpected pressure release of high pressure gas in hole（First of isolation
Screen）With to the coal dust in crack near extraction borehole side wall（Second isolated screen）Wash away moving, while in high pressure gas
The coal dust in broken coal dust and crack is gone out into drilling when pressure release, the supercharging-of repeated action is set up in extraction borehole
Pressure release aerodynamic field, it is final to dredge gas crack passage, increase coal body gas permeability.
Description of the drawings
Fig. 1 is that coal bed gas extraction drilling gas of the present invention flows shield schematic diagram；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is operation principle schematic diagram of the present invention.
Specific implementation mode
As shown in Figure 1 to Figure 3, a kind of mash gas pumping drilling automatic sparse blocks up permeability improvement device, including extraction pipeline, ajutage
Road adjusts pipeline, pressure control pneumatic operated valve 1 and pressure piping, and extraction pipeline includes drainage tube 2 and exhaust pipe 3 in hole, on exhaust pipe 3
Equipped with the first pneumatic operated valve 4；The first shut-off valve 5, the second pneumatic operated valve 6 and the first check valve 7 are equipped in air supply pipeline successively, first is single
It is connect to valve 7 with drainage tube in hole 2；The both ends for adjusting pipeline are connect with the first shut-off valve 5 and the first pneumatic operated valve 4 respectively, are adjusted
The second shut-off valve 8 and third pneumatic operated valve 9 are equipped on pipeline successively, third pneumatic operated valve 9 is located at the end for adjusting pipeline, and first is pneumatic
The unlatching control piper 10 and closing control pipeline 11 of valve 4 are connect with third pneumatic operated valve 9 respectively, the unlatching control of the second pneumatic operated valve 6
Tubulation road 12 and the unlatching with the closing control pipeline 11 of the first pneumatic operated valve 4 and the first pneumatic operated valve 4 respectively of closing control pipeline 13
Control piper 10 connects；Pressure piping both ends are connect with adjusting pipeline and air supply pipeline respectively, pressure piping and adjusting pipeline
For tie point between the second shut-off valve 8 and the first shut-off valve 5, the tie point of pressure piping and air supply pipeline is located at first unidirectionally
In valve 7 and hole between drainage tube 2, and pressure piping and the tie point of air supply pipeline are connect with third pneumatic operated valve 9, on pressure piping
It is equipped with booster pump 14, air accumulator 15 and the 4th pneumatic ball valve 16, the unlatching control piper 17 of the 4th pneumatic ball valve 16 and pass successively
It closes control piper 18 to connect with pressure control pneumatic operated valve 1 respectively, pressure control pneumatic operated valve 1 passes through the first connecting line 19 and the first pneumatic operated valve 4
Closing control pipeline 11 connect, and the first connecting line 19 be equipped with the second check valve 20, pressure control pneumatic operated valve 1 pass through second connect
It takes over road 21 to connect with pressure piping, and the tie point of the second connecting line 21 and pressure piping is located at air accumulator 15 and the 4th gas
Between dynamic ball valve 16；The closing control pipeline 13 and the 4th that second shut-off valve 8 passes through third connecting line 22 and the second pneumatic operated valve 6
The closing control pipeline 18 of pneumatic ball valve 16 connects, and third connecting line 22 is equipped with third check valve 23, and third check valve
23 are located at the tie point of third connecting line 22 and closing control pipeline 13 and third connecting line 22 and closing control pipeline 18
Between tie point, when third pneumatic operated valve 9 is closed, the closing control pipeline 11 and the second gas of pipeline and the first pneumatic operated valve 4 are adjusted
The unlatching control piper 12 of dynamic valve 6 is connected to, and when third pneumatic operated valve 9 is opened, the unlatching for adjusting pipeline and the first pneumatic operated valve 4 controls
Pipeline 10 is connected to the closing control pipeline 13 of the second pneumatic operated valve 6, and third pneumatic operated valve 9 is normally off；When the second shut-off valve 8 is beaten
When opening, the second shut-off valve 8 is connected to third pneumatic operated valve 9, when the second shut-off valve 8 is closed, the second shut-off valve 8 and the first pneumatic operated valve
4 unlatching control piper 10 is connected to the closing control pipeline 13 of the second pneumatic operated valve 6, and the second shut-off valve 8 is in normally open；When
When pressure control pneumatic operated valve 1 is closed, the closing control of the closing control pipeline 11 and the 4th pneumatic ball valve 16 of the first pneumatic operated valve 4
Tubulation road 18 constitutes access, when pressure control pneumatic operated valve 1 is opened, the closing control pipeline 11 and the 4th Pneumatic ball of the first pneumatic operated valve 4
The unlatching control piper 17 of valve 16 constitutes access, and pressure control pneumatic operated valve 1 is in normally off.
Drainage tube 2 and exhaust pipe 3 are connected by quick coupling 24 in hole, convenient for the company of drainage tube 2 and exhaust pipe 3 in hole
It connects, helps to improve working efficiency.Exhaust pipe 3 is equipped with first pressure gauge 25.
Regulation pipe road is equipped with filtering pressure regulation oil sprayer combined mechanism 26, and filtering pressure regulation oil sprayer combined mechanism 26 is located at the
Between one shut-off valve 5 and booster pump 14, filtering pressure regulation oil sprayer combined mechanism 26 is the prior art, can be to underground pressure air device
The gas of discharge is filtered.
First pneumatic operated valve 4 is pneumatic butterfly shut-off valve, and the first shut-off valve 5 is manual ball check valve, and the second pneumatic operated valve 6 is
Pneumatic 2/2-way valve, third pneumatic operated valve 9 are pneumatic two five-way valves, and the second shut-off valve 8 is manual two five-way valves, pressure control gas
Dynamic valve 1 is pneumatic two five-way valves.
Pressure piping is equipped with second pressure gauge 27.Pressure piping is equipped with relief valve 28, and relief valve 28 is manual shutoff
The high pressure gas in air accumulator 15 can be discharged in valve after stopping present apparatus work by relief valve 28.
A kind of stifled anti-reflection method of mash gas pumping drilling automatic sparse, it is characterised in that include the following steps：
（1）Air supply pipeline front end is connect with underground pressure air device and opens the first shut-off valve 5, a part of gas enters regulation pipe
Lu Zhong, another part gas enter in pressure piping；
（2）Into the gas triggering third pneumatic operated valve 9 adjusted in pipeline, the closing control pipe of pipeline and the first pneumatic operated valve 4 is adjusted
Road 11 is connected to the unlatching control piper 12 of the second pneumatic operated valve 6, to close the first pneumatic operated valve 4, opens the second pneumatic operated valve 6；
（3）After second pneumatic operated valve 6 is opened, the wind of underground pressure air device discharge is by drainage tube 2 in air supply pipeline access aperture, increasing
Atmospheric pressure value in macropore in drainage tube 2, the first check valve 7 prevent the gas backstreaming in hole in drainage tube 2；
（4）Gas in pressure piping is delivered in air accumulator 15 and constantly pressurizes by booster pump 14, and air accumulator 15, pressure control are pneumatic
The closing control pipeline 18 of valve 1 and the 4th pneumatic ball valve 16 constitutes access, and the 4th pneumatic ball valve 16 is closed；
（5）When the gas pressure value in air accumulator 15 is more than the operating pressure value of pressure control pneumatic operated valve 1, pressure control pneumatic operated valve 1 is opened,
The closing control pipeline 11 of first pneumatic operated valve 4 and the unlatching control piper 17 of the 4th pneumatic ball valve 16 constitute access, and the 4th is pneumatic
Ball valve 16 is in the open state, pressure piping and the composition of drainage tube 2 access in hole, in the high pressure gas access aperture in air accumulator 15
In drainage tube 2, the high pressure gas in hole in drainage tube 2 is sprayed into extraction borehole, to being fixedly arranged at extraction borehole drainage tube gas collection
The tamper of section（First of isolated screen 30）Carry out impact grinding；
（6）When gas in air accumulator 15 is less than the operating pressure value of pressure control pneumatic operated valve 1 by discharging its pressure value, pressure control is pneumatic
Valve 1 is closed, and the closing control pipeline 11 of the first pneumatic operated valve 4 and the closing control pipeline 18 of the 4th pneumatic ball valve 16 constitute access,
4th pneumatic ball valve 16 is closed, and the gas in pressure piping is delivered in air accumulator 15 and continues to add by booster pump 14
Pressure；
（7）Repeat step（4）To step（6）, when the gas pressure value in drainage tube 2 in hole reaches the action of third pneumatic operated valve 9
When pressure value, the company of closing control pipeline 13 for opening control piper 10 and the second pneumatic operated valve 6 of pipeline and the first pneumatic operated valve 4 is adjusted
It is logical, to open the first pneumatic operated valve 4, close the second pneumatic operated valve 6, the high pressure gas in hole in drainage tube 2 is arranged rapidly from exhaust pipe 3
Go out, it is broken that the high pressure gas in hole in drainage tube 2 carries out tearing to the tamper of extraction borehole drainage tube gas collecting segment（First every
Off screen 30）With to the coal dust in crack near extraction borehole side wall（Second isolated screen 31）Wash away moving, while in height
It presses and the coal dust in broken coal dust and crack is gone out into drilling when air venting；
（8）When the gas pressure value in drainage tube 2 in hole is less than the operating pressure value of third pneumatic operated valve 9, third pneumatic operated valve 9 is multiple
Position adjusts pipeline and is connected to the unlatching control piper 12 of the closing control pipeline 11 of the first pneumatic operated valve 4 and the second pneumatic operated valve 6, from
And the first pneumatic operated valve 4 is closed, open the second pneumatic operated valve 6；
（9）Step is repeated several times（2）To step（8）, until being discharged from exhaust pipe 3 without coal dust in drainage tube in hole 2；
（10）The second shut-off valve 8, the unlatching control piper 10 and the second gas of underground pressure air device and the first pneumatic operated valve 4 are opened manually
The closing control pipeline 13 of dynamic valve 6 is connected to, and to open the first pneumatic operated valve 4, closes the second pneumatic operated valve 6, in hole in drainage tube 2
Pressure release is discharged from exhaust pipe 3 in gas, finally closes the first shut-off valve 5.
The present apparatus start-up operation before, within 2 meters of extraction borehole must not someone stop and pass through, to prevent interface from collapsing de- wound
People, in addition the exhaust outlet of exhaust pipe 3 is against the unmanned place of 33 lateral wall of tunnel, to prevent high pressure gas and coal dust the disintegrating slag wound of ejection
People generally carries out each drainage holes 5 to 10 supercharging --- decompression cycle processes, without coal dust in drainage tube 2 in hole
It can be stopped operation when being discharged from exhaust pipe 3, exhaust pipe 3 is using metal hose, the operating pressure value of pressure control pneumatic operated valve 1
1.6MPa, when the pressure in air accumulator 15 is more than 1.6MPa, pressure control pneumatic operated valve 1 is opened, the operating pressure value of third pneumatic operated valve 9
For 0.6 MPa, when the air pressure in hole in drainage tube 2 is more than 0.6 MPa, third pneumatic operated valve 9 is opened, although pressure control pneumatic operated valve 1
Operating pressure value be higher than third pneumatic operated valve 9 operating pressure value, but between air accumulator 15 and third pneumatic operated valve 9 pipeline tool
There are certain length, and an aperture of the 4th pneumatic ball valve 16 of suitable control, the air pressure in hole in drainage tube 2 slowly improves, air accumulator
The process of 15 pressure releases is more gentle, thus the air pressure in hole in drainage tube 2 reach third pneumatic operated valve 9 operating pressure value it
Before, third pneumatic operated valve 9 will not be triggered during 15 pressure release of air accumulator and is acted, and the material of drainage tube 2 is polyethylene, pressure resistance in hole
Intensity is generally 0.8MPa, in order to ensure that drainage tube 2 is not destroyed by high pressure gas in hole, the operating pressure value of third pneumatic operated valve 9
It is less than the compressive resistance of drainage tube 2 in hole.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Still can the present invention be modified or be waited
With replacing, without departing from the spirit or scope of the invention, or any substitutions, the power in the present invention should all be covered
In sharp claimed range.
Claims (10)
1. a kind of mash gas pumping drilling automatic sparse blocks up permeability improvement device, it is characterised in that：Including extraction pipeline, air supply pipeline, adjusting
Pipeline, pressure control pneumatic operated valve and pressure piping, extraction pipeline include drainage tube and exhaust pipe in hole, and it is pneumatic that exhaust pipe is equipped with first
Valve；The first shut-off valve, the second pneumatic operated valve and the first check valve, the first check valve and drainage tube in hole are equipped in air supply pipeline successively
Connection；The both ends for adjusting pipeline are connect with the first shut-off valve and the first pneumatic operated valve respectively, and regulation pipe road is equipped with second section successively
Only valve and third pneumatic operated valve, third pneumatic operated valve are located at the end for adjusting pipeline, the unlatching control piper of the first pneumatic operated valve and closing
Control piper is connect with third pneumatic operated valve respectively, and the unlatching control piper and closing control pipeline of the second pneumatic operated valve are respectively with first
The unlatching control piper connection of the closing control pipeline and the first pneumatic operated valve of pneumatic operated valve；Pressure piping both ends respectively with adjust pipeline
It is connected with air supply pipeline, the tie point of pressure piping and adjusting pipeline is between the second shut-off valve and the first shut-off valve, supercharging
Pipeline and the tie point of air supply pipeline are located in the first check valve and hole between drainage tube, and the company of pressure piping and air supply pipeline
Contact is connect with third pneumatic operated valve, is equipped with booster pump, air accumulator and the 4th pneumatic ball valve, the 4th Pneumatic ball on pressure piping successively
Valve is opened control piper and closing control pipeline and connect respectively with pressure control pneumatic operated valve, pressure control pneumatic operated valve by the first connecting line and
The closing control piping connection of first pneumatic operated valve, and the first connecting line is equipped with the second check valve, pressure control pneumatic operated valve passes through the
Two connecting lines are connect with pressure piping, and the tie point of the second connecting line and pressure piping is located at air accumulator and the 4th pneumatically
Between ball valve；Second shut-off valve passes through the closing control pipeline and the 4th pneumatic ball valve of third connecting line and the second pneumatic operated valve
Closing control piping connection, third connecting line be equipped with third check valve, and third check valve be located at third connecting line and
Second pneumatic operated valve closing control piping connection point and third connecting line and the 4th pneumatic ball valve closing control piping connection point it
Between；When third pneumatic operated valve is closed, the unlatching control of the closing control pipeline and the second pneumatic operated valve of pipeline and the first pneumatic operated valve is adjusted
Pipeline connection processed adjusts the unlatching control piper and the second pneumatic operated valve of pipeline and the first pneumatic operated valve when third pneumatic operated valve is opened
Closing control pipeline connection, third pneumatic operated valve be normally off；When the second shut-off valve is opened, the second shut-off valve and third gas
Dynamic valve connection, when the second shut-off valve is closed, the unlatching control piper and the second pneumatic operated valve of the second shut-off valve and the first pneumatic operated valve
Closing control pipeline connection, the second shut-off valve is in normally open；When pressure control pneumatic operated valve is closed, first is pneumatic
The closing control pipeline of valve and the closing control pipeline of the 4th pneumatic ball valve constitute access, when pressure control pneumatic operated valve is opened, first
The closing control pipeline of pneumatic operated valve and the unlatching control piper of the 4th pneumatic ball valve constitute access, and pressure control pneumatic operated valve is in normally closed shape
State.
2. a kind of mash gas pumping drilling automatic sparse according to claim 1 blocks up permeability improvement device, it is characterised in that：In the hole
Drainage tube is connected with exhaust pipe by quick coupling.
3. a kind of mash gas pumping drilling automatic sparse according to claim 1 or 2 blocks up permeability improvement device, it is characterised in that：It is described
Exhaust pipe is equipped with first pressure gauge.
4. a kind of mash gas pumping drilling automatic sparse according to claim 1 or 2 blocks up permeability improvement device, it is characterised in that：It is described
Regulation pipe road is equipped with filtering pressure regulation oil sprayer combined mechanism, and filtering pressure regulation oil sprayer combined mechanism is located at the first shut-off valve and increases
Between press pump.
5. a kind of mash gas pumping drilling automatic sparse according to claim 1 blocks up permeability improvement device, it is characterised in that：Described first
Pneumatic operated valve is pneumatic butterfly shut-off valve, and the first shut-off valve is manual ball check valve, and the second pneumatic operated valve is pneumatic 2/2-way valve,
Third pneumatic operated valve is pneumatic two five-way valves, and the second shut-off valve is manual two five-way valves, and pressure control pneumatic operated valve is pneumatic two five
Port valve.
6. a kind of mash gas pumping drilling automatic sparse according to claim 1 blocks up permeability improvement device, it is characterised in that：The supercharging
Pipeline is equipped with second pressure gauge.
7. a kind of mash gas pumping drilling automatic sparse according to claim 1 or 2 blocks up permeability improvement device, it is characterised in that：It is described
Pressure piping is equipped with relief valve, and relief valve is hand stop valve.
8. a kind of watt blocking up permeability improvement device using mash gas pumping drilling automatic sparse described in any claim in claim 1~7
This extraction borehole automatic sparse blocks up anti-reflection method, it is characterised in that includes the following steps：
Air supply pipeline front end is connect to underground pressure air device and is opened the first shut-off valve, a part of gas enters adjusting pipeline
In, another part gas enters in pressure piping；
Third pneumatic operated valve is triggered into the gas adjusted in pipeline, adjusts the closing control pipeline and the of pipeline and the first pneumatic operated valve
The unlatching control piper of two pneumatic operated valves is connected to, and to close the first pneumatic operated valve, opens the second pneumatic operated valve；
After second pneumatic operated valve is opened, the wind of underground pressure air device discharge passes through in drainage tube in air supply pipeline access aperture；
Gas in pressure piping is delivered in air accumulator and constantly pressurizes by booster pump, air accumulator, pressure control pneumatic operated valve and the 4th
The closing control pipeline of pneumatic ball valve constitutes access, and the 4th pneumatic ball valve is closed；
When the gas pressure value in air accumulator is more than the operating pressure value of pressure control pneumatic operated valve, pressure control pneumatic operated valve is opened, the first gas
The closing control pipeline of dynamic valve and the unlatching control piper of the 4th pneumatic ball valve constitute access, and the 4th pneumatic ball valve is in open shape
State, pressure piping constitute access with drainage tube in hole, and the high pressure gas in air accumulator is discharged into hole in drainage tube；
When gas in air accumulator is less than the operating pressure value of pressure control pneumatic operated valve by discharging its pressure value, pressure control pneumatic operated valve closes
It closes, the closing control pipeline of the first pneumatic operated valve and the closing control pipeline of the 4th pneumatic ball valve constitute access, the 4th pneumatic ball valve
It is closed, the gas in pressure piping is delivered in air accumulator and continues to pressurize by booster pump；
Repeat step（4）To step（6）, when the gas pressure value in drainage tube in hole reaches the operating pressure value of third pneumatic operated valve
When, the closing control pipeline connection of the unlatching control piper and the second pneumatic operated valve of pipeline and the first pneumatic operated valve is adjusted, to open
First pneumatic operated valve closes the second pneumatic operated valve, and the gas in hole in drainage tube is discharged rapidly from exhaust pipe；
When the gas pressure value in drainage tube in hole is less than the operating pressure value of third pneumatic operated valve, third pneumatic operated valve resets, and adjusts
Section pipeline is connected to the unlatching control piper of the closing control pipeline of the first pneumatic operated valve and the second pneumatic operated valve, to close the first gas
Dynamic valve, opens the second pneumatic operated valve；
Step is repeated several times（2）To step（8）, until being discharged from exhaust pipe without coal dust in drainage tube in hole；
Adjust the second shut-off valve, the closing control for opening control piper and the second pneumatic operated valve of underground pressure air device and the first pneumatic operated valve
Pipeline connection processed closes the second pneumatic operated valve to open the first pneumatic operated valve, and the gas in hole in drainage tube is let out from exhaust pipe discharge
Pressure, finally closes the first shut-off valve.
9. mash gas pumping drilling automatic sparse according to claim 8 blocks up anti-reflection method, it is characterised in that：The pressure control is pneumatic
The operating pressure value of valve is 1.6MPa.
10. mash gas pumping drilling automatic sparse according to claim 8 or claim 9 blocks up anti-reflection method, it is characterised in that：The third
The operating pressure value of pneumatic operated valve is 0.6 MPa.
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