CN109611083A - A kind of mash gas pumping drilling gas leakage amount determining device - Google Patents
A kind of mash gas pumping drilling gas leakage amount determining device Download PDFInfo
- Publication number
- CN109611083A CN109611083A CN201811554348.XA CN201811554348A CN109611083A CN 109611083 A CN109611083 A CN 109611083A CN 201811554348 A CN201811554348 A CN 201811554348A CN 109611083 A CN109611083 A CN 109611083A
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- China
- Prior art keywords
- measurement pipe
- holes
- measuring rod
- gas
- conehead
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
The invention discloses a kind of mash gas pumping drilling gas leakage amount determining devices, including measurement pipe conehead, measuring rod with holes and measurement pipe, one end of measurement pipe conehead is circular cone end, and other end connecting band hole measurement bar drives measuring rod to be connected with measurement pipe far from one end of measurement pipe conehead；It is threadedly coupled, is threadedly coupled between the measuring rod with holes and measurement pipe, the screw thread is fine thread between the measurement pipe conehead and measuring rod with holes.Testing time needed for this kind of mash gas pumping drilling gas leakage amount determining device is shorter, and workload is smaller, and test accuracy rate is high.
Description
Technical field
The present invention relates to coal mine gas drainage technical field, in particular to a kind of mash gas pumping drilling air leakage measurement dress
It sets.
Background technique
Coal and gas prominent and gas explosion accident (referred to as " gas accident ") are the main of threat Safety of Coal Mine Production
Disaster, often result in mass casualties and huge property loss once accident occurs.Gas drainage is to administer gas accident
Basic plan, and gas drainage judge up to standard is then the inspection to gas control working effect, is the weight for preventing gas accident
Want defence line.To ensure that coal mine gas drainage is up to standard, gas accident is effectively taken precautions against, is held in Shenyang City, Liaoning Province on July 8th, 2008
National control of coalmine gas on-the-spot meeting on propose " ventilation is reliable, extraction is up to standard, effective monitoring, management in place " coal mine gas
16 word work system of comprehensive treatment." coal mine gas drainage temporary provisions up to standard " (total coal dress of safety supervision is printed and distributed in October, 2011
(2011) No. 163), wherein Article 16 provides: " gas drainage mine should be equipped with gas drainage monitoring system, real time monitoring
Pipe network gas density, negative pressure or pressure difference, flow, temperature parameter and the start-stop state of equipment etc..Mash gas extraction metrical instrument should
Meet related metering standard requirements；Metering point layout should meet the needs of gas drainage evaluation up to standard, pumping plant, supervisor,
The arrangement measuring point such as main pipe, branch pipe and the region branch, the drill site that need individually to evaluate ".
Since underground coal mine getting working face is frequently present of cross-operation, mechanical work, to blow out the environmental factors such as vibration equal
It may cause extraction piping failure gas leakage.After pipeline gas leakage occurs, the fresh gas flow outside pipeline enters in pipeline, makes in pipeline
High concentration gas stream concentration is down to explosive range, once encountering the incendiary sources such as collision spark, gas explosion can occur.This outer tube
After road gas leakage, the extraction negative pressure in pipe can be reduced rapidly, and cause extraction system to lose gas drainage ability, it is seen that gas drainage pipe
Road breakage gas leakage has serious harm.To prevent and treat gas pumping pipeline gas leakage, on the one hand need to reinforce the guarantor to extraction pipeline
On the other hand shield is needed to reaction discovery air leakage point and is handled once pipeline gas leakage occurs.Mine still uses manually at present
Periodically the mode of inspection pipeline checks the gas leakage situation of pipeline, and this investigation mode needs to put into a large amount of artificial and can not be to pipe
Road is nursed in real time, once gas leakage, which occurs, can not make fast reaction.
As it can be seen that carrying out real time monitoring by gas leakage situation of the gas drainage pipe network monitoring system to pipeline has important meaning
Justice.Petroleum, chemical industry, Gas Industry gas pipeline leakage (gas leakage) diagnostic techniques to be required to special or auxiliary instrument real
Now leakage (gas leakage) diagnosis, and be positive pressure pipeline (negative pressure is greater than external environment negative pressure in managing), but gas pumping pipeline is
Negative-pressure pipeline (negative pressure is lower than external environment negative pressure in managing), and it is based on cost consideration, colliery scene can not receive in extraction
Pipe installing is used to diagnose the special or supplementary instrument of pipe network gas leakage, and therefore, it is difficult to borrow the pipe leakage (gas leakage) of other field
Intelligent Diagnosis Technology diagnoses the pipeline section gas leakage situation of gas drainage pipe network.
Summary of the invention
The object of the present invention is to provide a kind of mash gas pumping drilling gas leakage amount determining devices, to solve in above-mentioned background technique
The problem of proposition.
The present invention provides a kind of mash gas pumping drilling gas leakage amount determining devices, including measurement pipe conehead, measuring rod with holes
And measurement pipe, one end of the measurement pipe conehead are circular cone end, other end connecting band hole measurement bar, the measuring rod with holes is remote
One end from measurement pipe conehead is connected with measurement pipe.
It is threadedly coupled between the measurement pipe conehead and measuring rod with holes, screw thread between the measuring rod with holes and measurement pipe
Connection, the screw thread is fine thread.
The measurement pipe conehead includes successively connected circular cone end, cylindrical section and linkage section, the circle of the circular cone end
Cone angle < 45 °, the cylindrical section outer diameter are 10~15mm, 3~10mm of length, and the linkage section offers the interior spiral shell for connection
Line, the internal screw thread are matched with the external screw thread on measuring rod with holes, reach >=10mm of the internal screw thread, thread Pilot hole
Drilling depth >=11mm, thread Pilot hole are flat.
The external diametrical extent of the measuring rod with holes is 8~13mm, and internal diameter is 3~8mm, connection with the length of screw thread >=
10mm；The multiple through-holes of circumference uniform distribution of the measuring rod with holes, the diameter of the through-hole are Φ 1mm.
For the inside diameter ranges of the measurement pipe in 3~8mm, external diametrical extent is 8~15mm, the left end diameter of measurement pipe with it is with holes
The diameter of measuring rod matches.
The beneficial effects of the present invention are:
It when carrying out the work of concordant gas pressure measurement in coal seam, eliminates and moves drilling machine, process of drilling, construction only needs
Lighter air drill and pneumatic pick can be completed, and workload is smaller.
When measurement pipe conehead hammers into coal body, by the extruding of coal body and measurement pipe conehead, coal body is hammered into measurement pipe conehead
It can be achieved self-styled after certain distance, guarantee the Real Gas pressure of its present position of measuring rod with holes.
When due to hammering into measurement pipe conehead, gas can only be scattered and disappeared by the hole on measuring rod with holes, and loss amount is smaller, and
Entire survey presses required gas pressure balance space smaller, so the required testing time is shorter.
The present invention is not only able to shorten the gas pressure measurement period, improves the success rate of piezometry, moreover it is possible in measurement pipe
Conehead follows closely the process into coal body, can by follow closely into complexity judge the Failure type of coal, be the survey of gas relevant parameter
It is fixed that foundation is provided.
Detailed description of the invention
Fig. 1 is a kind of mash gas pumping drilling air leakage assay device structures schematic diagram provided by the invention；
Fig. 2 is a kind of mash gas pumping drilling gas leakage amount determining device connection schematic diagram provided by the invention.
Description of symbols:
1, measurement pipe conehead；2, measuring rod with holes；3, measurement pipe.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
As shown in Figs. 1-2, the embodiment of the invention provides a kind of mash gas pumping drilling gas leakage amount determining device, comprising: it surveys
Buret conehead 1, measuring rod with holes 2 and measurement pipe 3, one end of the measurement pipe conehead 1 are circular cone end, and other end connection is with holes
Measuring rod 2, the measuring rod 2 with holes are connected with measurement pipe 3 far from one end of measurement pipe conehead 1.
It is threadedly coupled between the measurement pipe conehead 1 and measuring rod 2 with holes, between the measuring rod 2 with holes and measurement pipe 3
It is threadedly coupled, the screw thread is fine thread.
The measurement pipe conehead 1 includes successively connected circular cone end, cylindrical section and linkage section, the circle of the circular cone end
Cone angle < 45 °, the cylindrical section outer diameter are 10~15mm, 3~10mm of length, and the linkage section offers the interior spiral shell for connection
Line, the internal screw thread are matched with the external screw thread on measuring rod 2 with holes, reach >=10mm of the internal screw thread, thread Pilot hole
Drilling depth >=11mm, thread Pilot hole be it is flat.
The external diametrical extent of the measuring rod with holes 2 is 8~13mm, and internal diameter is 3~8mm, connection with the length of screw thread >=
10mm；The multiple through-holes of circumference uniform distribution of the measuring rod with holes 2, the diameter of the through-hole are Φ 1mm.
For the inside diameter ranges of the measurement pipe 3 in 3~8mm, external diametrical extent is 8~15mm, the left end diameter and band of measurement pipe 3
The diameter of hole measurement bar 2 matches.
Measurement pipe is connected by root, is led to by a kind of mash gas pumping drilling gas leakage amount determining device provided in an embodiment of the present invention
It crosses gas surveying hole to go deep into coal body, guarantees that each connecting portion is air tight, deep length is identical as drilling depth, often exits one
Root records a gas density and flow；It often withdraws from a measurement pipe and records a gas density nxWith gas flow L, gas
The average value of concentration isThe gas scale of extractionIf drilling is air tight, the gas of extraction is dense
Degree should be close to 100%, therefore the gas density measured is lower than 100%, it is believed that and it is to there is air to leak into air by coalmass crevasse,
Cause gas density relatively low, therefore air leakage
It when carrying out the work of concordant gas pressure measurement in coal seam, eliminates and moves drilling machine, process of drilling, construction only needs
Lighter air drill and pneumatic pick can be completed, and workload is smaller.
When measurement pipe conehead hammers into coal body, by the extruding of coal body and measurement pipe conehead, coal body is hammered into measurement pipe conehead
It can be achieved self-styled after certain distance, guarantee the Real Gas pressure of its present position of measuring rod with holes.
When due to hammering into measurement pipe conehead, gas can only be scattered and disappeared by the hole on measuring rod with holes, and loss amount is smaller, test
Accuracy rate is high, and entirely surveys and press required gas pressure balance space smaller, so the required testing time is shorter.
The present invention is not only able to shorten the gas pressure measurement period, improves the success rate of piezometry, moreover it is possible in measurement pipe
Conehead follows closely the process into coal body, can by follow closely into complexity judge the Failure type of coal, be the survey of gas relevant parameter
It is fixed that foundation is provided.
Disclosed above is only several specific embodiments of the invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think variation should all fall into protection scope of the present invention.
Claims (5)
1. a kind of mash gas pumping drilling gas leakage amount determining device characterized by comprising measurement pipe conehead (1), measuring rod with holes
(2) and measurement pipe (3), one end of the measurement pipe conehead (1) is circular cone end, and other end connecting band hole measurement bar (2) is described
Measuring rod (2) with holes is connected with measurement pipe (3) far from the one end of measurement pipe conehead (1).
2. mash gas pumping drilling gas leakage amount determining device as described in claim 1, which is characterized in that the measurement pipe conehead
(1) it is threadedly coupled between measuring rod with holes (2), is threadedly coupled between the measuring rod (2) with holes and measurement pipe (3), it is described
Screw thread is fine thread.
3. mash gas pumping drilling gas leakage amount determining device as described in claim 1, which is characterized in that the measurement pipe conehead
It (1) include successively connected circular cone end, cylindrical section and linkage section, coning angle < 45 ° of the circular cone end, the cylindrical section
Outer diameter is 10~15mm, 3~10mm of length, and the linkage section offers the internal screw thread for connection, the internal screw thread with it is with holes
External screw thread matching on measuring rod (2), reach >=10mm of the internal screw thread, drilling depth >=11mm of thread Pilot hole,
Thread Pilot hole is flat.
4. mash gas pumping drilling gas leakage amount determining device as described in claim 1, which is characterized in that the measuring rod with holes
(2) external diametrical extent is 8~13mm, and internal diameter is 3~8mm, connection length >=10mm of screw thread；The measuring rod with holes (2)
The multiple through-holes of circumference uniform distribution, the diameter of the through-hole is Φ 1mm.
5. mash gas pumping drilling gas leakage amount determining device as described in claim 1, which is characterized in that the measurement pipe (3)
For inside diameter ranges in 3~8mm, external diametrical extent is 8~15mm, the diameter phase of the left end diameter and measuring rod with holes (2) of measurement pipe (3)
Matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554348.XA CN109611083A (en) | 2018-12-18 | 2018-12-18 | A kind of mash gas pumping drilling gas leakage amount determining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554348.XA CN109611083A (en) | 2018-12-18 | 2018-12-18 | A kind of mash gas pumping drilling gas leakage amount determining device |
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| Publication Number | Publication Date |
|---|---|
| CN109611083A true CN109611083A (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811554348.XA Pending CN109611083A (en) | 2018-12-18 | 2018-12-18 | A kind of mash gas pumping drilling gas leakage amount determining device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137221A (en) * | 2021-04-22 | 2021-07-20 | 西安科技大学 | Three-level gas leakage evaluation system and evaluation method for whole gas extraction system |
| CN113944498A (en) * | 2021-10-18 | 2022-01-18 | 中煤科工集团重庆研究院有限公司 | Device and method for accurately measuring gas flow on negative pressure side in coal seam gas extraction |
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| CN106988730A (en) * | 2017-06-01 | 2017-07-28 | 华北科技学院 | Gas parametric measurement probe and its application method in a kind of coal seam |
| CN107014554A (en) * | 2017-06-01 | 2017-08-04 | 华北科技学院 | Gas parametric measurement probe in a kind of coal seam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137221A (en) * | 2021-04-22 | 2021-07-20 | 西安科技大学 | Three-level gas leakage evaluation system and evaluation method for whole gas extraction system |
| CN113137221B (en) * | 2021-04-22 | 2024-03-22 | 西安科技大学 | Three-level gas leakage evaluation system and evaluation method for gas extraction full system |
| CN113944498A (en) * | 2021-10-18 | 2022-01-18 | 中煤科工集团重庆研究院有限公司 | Device and method for accurately measuring gas flow on negative pressure side in coal seam gas extraction |
| CN113944498B (en) * | 2021-10-18 | 2024-02-02 | 中煤科工集团重庆研究院有限公司 | Accurate measuring device and method for coal bed gas extraction negative pressure side gas flow |
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Application publication date: 20190412 |