CN208934688U - The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas - Google Patents
The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas Download PDFInfo
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- CN208934688U CN208934688U CN201821678115.6U CN201821678115U CN208934688U CN 208934688 U CN208934688 U CN 208934688U CN 201821678115 U CN201821678115 U CN 201821678115U CN 208934688 U CN208934688 U CN 208934688U
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- Prior art keywords
- negative pressure
- gas
- solenoid valve
- guide tube
- drilling
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003566 sealing material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses the pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas, which includes methane gas extraction pipeline, negative pressure test pipeline and solenoid valve control route；The utility model arranges negative pressure test pipeline and solenoid valve control route in the drilling of methane gas extraction pipeline, the corresponding branch gas-guide tube in negative pressure testing tube road is opened in the movement for being operated with manual switches control solenoid valve respectively, differential manometer Observable must drill interior different depth position and aperture at pressure difference registration, the interior negative pressure attenuation that entirely drills is obtained, to more accurately be analyzed gas pumping effect.
Description
Technical field
The utility model belongs to coal mining field, and in particular to the pre- attenuating drilling negative pressure decaying of a kind of coal-bed gas is surveyed
Trial assembly is set.
Background technique
In China's coal-mine exploitation, gas is to endanger one of principal element of mine safety production, therefore the prevention and treatment of gas
It is very necessary, and gas drainage is to prevent and treat the essential measure of coal mine gas disaster accident.In recent years, with construction technology and equipment
Improvement, mash gas pumping drilling length is increasingly longer, and long drilled holes have unique advantage in gas drainage, increases extraction borehole in coal
Length in layer, to raising gas drainage amount significant effect.But in long drilled holes gas drainage, the negative pressure decaying in hole is also compared
It is more serious, cause extracting result very poor, or even to will appear invalid hole long；Simultaneously as negative pressure is along the length direction of hole in drilling
The phenomenon that decaying and will lead to the lack of uniformity of extracting result, and then will cause the extinction of coal body entirety and locally non-extinction, gives mine
Safety in production bring hidden danger.
For current long drilled holes gas drainage, simple gaging hole mouth negative pressure has been unable to satisfy requirement, and existing survey is grown
Negative pressure condition mainly uses beam tube method of testing in drilling, and beam tube method of testing is easy to make if placing beam tube in a drilling excessively
Local resistance is excessively high in pore-forming, and gas drainage and extraction negative pressure data are affected；If multiple holes place beam tube if fiber crops are installed
It is tired, heavy workload, and institute's measured data, not in the same hole, error is larger.Therefore, for long drilled holes gas drainage, design one
It kind can easily and accurately the device of different depth negative pressure be necessary in instrument connection.
Utility model content
The purpose of the utility model is to provide the pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas, Ke Yi
The negative pressure condition of different depth is measured during long drilled holes gas drainage, and easy to operate, accuracy is high.
To achieve the above object, the technical solution adopted in the utility model is that the pre- attenuating drilling of a kind of coal-bed gas is negative
Press attenuation test device, including methane gas extraction pipeline, negative pressure test pipeline and solenoid valve control route；Wherein negative pressure tests pipeline
It is arranged in the drilling of methane gas extraction pipeline with solenoid valve control route, at aperture, negative pressure tests pipeline and solenoid valve
Control route is located in the gap of drainage tube and the wall that drills, this section sealing material sealing of hole, close to hole bottom, negative pressure testing tube
Road end is fixed on gripping mechanism.
Negative pressure testing tube routing differential manometer, gas-guide tube and miniature explosion-proof solenoid valve block at；Differential manometer is located at drilling
Outside aperture, gas-guide tube is located in drilling in extended state, and sets branch gas-guide tube at a certain distance, on each branch gas-guide tube
Solenoid valve is arranged between every two branch gas-guide tube.
Miniature explosion-proof solenoid valve in the negative pressure test pipeline, the solenoid valve type on each branch gas-guide tube is normal
Closed form, the solenoid valve type between every two branch gas-guide tube are open type.
The solenoid valve control route is mainly by controller, relay and miniature explosion-proof solenoid valve block at a branch is led
The valve between valve and the branch gas-guide tube and the latter branch gas-guide tube on tracheae is set as one group, by the same relay control
System (valve on the innermost branch gas-guide tube in hole is individually controlled by a relay).
The beneficial effect that the utility model generates is: the pre- attenuating drilling negative pressure of a kind of coal-bed gas of the utility model declines
Subtract test device, corresponding solenoid valve block can be made by the manual switch outside control drilling during long drilled holes gas drainage
Movement, opens the pressure-measuring pipe road of different depth in drilling, to measure the negative pressure condition of different depth in drilling.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is that the negative pressure of the utility model tests piping diagram.
Fig. 3 is the solenoid valve control schematic diagram of the utility model.
Fig. 4, Fig. 5, Fig. 6 and Fig. 7 are the installation procedure figure of the utility model.
In figure: the coal seam 1-, 2- sealing material, 3- drainage tube, 4- negative pressure test pipeline, 401- gas-guide tube, 402- differential manometer,
403- branch gas-guide tube, 5- miniature explosion-proof solenoid valve, 501- miniature explosion-proof solenoid valve/closed type, 502- miniature explosion-proof solenoid valve/
Open type, 6- gripping mechanism, 7- drilling rod, 8- open and close type drill bit.
Specific embodiment
As shown in Figure 1, negative pressure test pipeline 4 is arranged in the drilling of methane gas extraction pipeline, solenoid valve is installed on pipeline
5；Entire pipeline is located in the gap in drainage tube 3 and coal seam 1 near close aperture close to the tight device 6 of hole bottom connection card,
This section 2 sealing of hole of sealing material.
6 surrounding of gripping mechanism is equipped with spring controlled " claw type structure ", should be under " claw type structure " normal condition
Opening mode puts the direction of its pawl towards opening outside hole into drilling rod 7, is pushed into the pawl meeting clamping drilling wall opened when drilling bottom, plays
Fixed function.
As shown in Fig. 2, negative pressure test pipeline 4 is by gas-guide tube 401, differential manometer 402, branch gas-guide tube 403, miniature anti-
Quick-fried solenoid valve/closed type 501 and miniature explosion-proof solenoid valve/open type 502 form；Wherein on the gas-guide tube 401 of drilling outer end
Differential manometer 402 is installed, and on the gas-guide tube 401 inside sealing section to bottom hole, opens up branch gas-guide tube at interval of certain distance
402, it is successively set as X1, X2, X3... from inside to outside.Miniature explosion-proof solenoid valve/normally closed is set on each branch gas-guide tube 401
Type 501, is set as a, and miniature explosion-proof solenoid valve/open type 502 is arranged between every two branch gas-guide tube 401, is set as b.
Miniature explosion-proof solenoid valve/the closed type 501 and miniature explosion-proof solenoid valve/open type 502 is all bi-bit bi-pass
Valve plays on-off action in negative pressure test pipeline 4, is connected to the position of different depth in aperture to hole to measure negative pressure feelings
Condition.
It is illustrated in figure 3 solenoid valve control schematic diagram, the solenoid valve control route is poly- using mining polyethylene insulation
Vinyl chloride retarding jacket communication cable, in the borehole with the negative pressure test binding of pipeline 4 arrangement.
The solenoid valve control route, by a branch gas-guide tube 403 solenoid valve a and the branch gas-guide tube with
Solenoid valve b between the latter branch gas-guide tube is set as one group, i.e., X1-a and X1-b, X2-a and X2-b etc. are set to one group
Valve, the valve a on the innermost branch gas-guide tube in hole are individually controlled by a relay.
The solenoid valve control route, each corresponding relay of manual switch control.Therefore, the position apertured Kou Chu is
X0 when surveying pressure difference at X0-X1, is closed manual switch 1, and X1-a valve is opened at this time, X1-b valve closure, i.e. differential pressure indicator data measured is
X0-X1 pressure difference, reading, which finishes, disconnects manual switch 1；When surveying pressure difference at X0-X2, it is closed manual switch 2, X2-a valve is beaten at this time
It opens, X2-b valve closure, and front X1-a valve is closed, X1-b valve is opened, and X0-X2 is that access i.e. differential pressure indicator data measured is X0-X2
Pressure difference, reading, which finishes, disconnects manual switch 2；It is successively as above operated, each monitoring point in hole can be measured respectively
Negative pressure data.
It is illustrated in figure 4 the first step of present apparatus installation procedure, first progress bore operation, and cleans 7 internal water accumulation of drilling rod
And cinder, until no longer instead going out drilling cuttings in hole.
It is illustrated in figure 5 the second step of present apparatus installation procedure, the negative pressure testing tube of branch gas-guide tube 403 will have been set in advance
Road 4 is straightened, and solenoid valve control route is tightened therewith；After the least significant end of gas-guide tube 401 is connect with bottom hole gripping mechanism 6, put
Enter slowly steady push in drilling rod 7, gas-guide tube 401 is made to stretch the standard to guarantee depth locating for each branch gas-guide tube 403 as far as possible
True property.
It is illustrated in figure 6 the third step of present apparatus installation procedure, 8 crossbeam of drill bit is opened, gripping mechanism 6 is pushed into bottom hole,
After the gripping mechanism 6 that determination is connect with gas-guide tube 401 anchors stabilization in hole, start dismounting drilling rod 7.
It is illustrated in figure 7 the 4th step of present apparatus installation procedure, drainage tube 3 is inserted among aperture, finally carries out sealing of hole.
Test position X1, X2...X5 are the setting measuring point of the utility model in the hole, can be according to existing when specific implementation
Field needs to carry out appropriate adjustment.
Claims (4)
- The negative pressure attenuation test device 1. the pre- attenuating of a kind of coal-bed gas drills, it is characterised in that: including methane gas extraction pipeline, bear Pressure test pipeline and solenoid valve control route；Wherein negative pressure test pipeline and solenoid valve control route are arranged in gas drainage pipe In the drilling on road, at aperture, negative pressure tests pipeline and solenoid valve control route is located at the gap of drainage tube with the wall that drills Between, this section sealing material sealing of hole, close to hole bottom, negative pressure test line end is fixed on gripping mechanism.
- The negative pressure attenuation test device 2. the pre- attenuating of a kind of coal-bed gas as described in claim 1 drills, it is characterised in that: institute State negative pressure testing tube routing differential manometer, gas-guide tube and miniature explosion-proof solenoid valve block at；Gas-guide tube is located in drilling in extended state, Differential manometer is located at outside the aperture of drilling, and drilling and sealing section to setting branch gas-guide tube, each branch at a certain distance between bottom hole Solenoid valve is arranged between every two branch gas-guide tube on gas-guide tube.
- The negative pressure attenuation test device 3. the pre- attenuating of a kind of coal-bed gas as claimed in claim 2 drills, it is characterised in that: institute The miniature explosion-proof solenoid valve in negative pressure test pipeline is stated, the solenoid valve type on each branch gas-guide tube is closed type, every Solenoid valve type between two branch gas-guide tubes is open type.
- The negative pressure attenuation test device 4. the pre- attenuating of a kind of coal-bed gas as described in claim 1 drills, it is characterised in that: institute Solenoid valve control route is stated mainly by controller, relay and miniature explosion-proof solenoid valve block at valve on a branch gas-guide tube And the valve between the branch gas-guide tube and the latter branch gas-guide tube is set as one group, is controlled by the same relay, mesoporous Valve on innermost branch gas-guide tube is individually controlled by a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678115.6U CN208934688U (en) | 2018-10-16 | 2018-10-16 | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678115.6U CN208934688U (en) | 2018-10-16 | 2018-10-16 | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208934688U true CN208934688U (en) | 2019-06-04 |
Family
ID=66724814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821678115.6U Expired - Fee Related CN208934688U (en) | 2018-10-16 | 2018-10-16 | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
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| CN (1) | CN208934688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162704A (en) * | 2018-10-16 | 2019-01-08 | 中国矿业大学(北京) | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
| CN115788404A (en) * | 2022-12-08 | 2023-03-14 | 中煤科工集团重庆研究院有限公司 | Method and system for measuring radial different negative pressure influence ranges of coal mine underground extraction drill hole |
-
2018
- 2018-10-16 CN CN201821678115.6U patent/CN208934688U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162704A (en) * | 2018-10-16 | 2019-01-08 | 中国矿业大学(北京) | The pre- attenuating drilling negative pressure attenuation test device of a kind of coal-bed gas |
| CN115788404A (en) * | 2022-12-08 | 2023-03-14 | 中煤科工集团重庆研究院有限公司 | Method and system for measuring radial different negative pressure influence ranges of coal mine underground extraction drill hole |
| CN115788404B (en) * | 2022-12-08 | 2024-10-18 | 中煤科工集团重庆研究院有限公司 | Method and system for measuring influence ranges of radially different negative pressures of underground coal mine extraction drilling holes |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 Termination date: 20201016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |