CN204082135U - Extraction borehole sealing quality detector - Google Patents
Extraction borehole sealing quality detector Download PDFInfo
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- CN204082135U CN204082135U CN201420539906.6U CN201420539906U CN204082135U CN 204082135 U CN204082135 U CN 204082135U CN 201420539906 U CN201420539906 U CN 201420539906U CN 204082135 U CN204082135 U CN 204082135U
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Abstract
The utility model discloses a kind of extraction borehole sealing quality detector, comprise casing, establish negative-pressure ejecting device and cylinder body in casing, casing is provided with pressure wind interface, the compressed air inlet of negative-pressure ejecting device is connected with pressure wind interface by tube connector, and pressure wind interface is connected with underground pressure air pipeline; Piston is established in described cylinder body, ventilation opening cylinder body being provided with successively gas inlet, gas gas outlet and being connected with the pumped gas entrance of negative-pressure ejecting device by the 3rd tracheae, described casing is provided with Sampling Interface, gas inlet connects the sampling pipe that can stretch in mash gas pumping drilling, and gas inlet also connects Sampling Interface by the first tracheae, is provided with the gas density analyzer that can be connected with Sampling Interface outside casing.The utility model is the extraction borehole sealing quality detector that can improve extracting result.
Description
Technical field
The utility model relates to a kind of extraction borehole sealing quality detector.
Background technology
The gas existed in coal seam is one of main harm in coal production process, and it is again a kind of clean energy simultaneously.Gas carried out extraction before seam mining, was the essential measure solving Gas Outburst and eliminate mine safety accidents.By mash gas extraction, be again obtain clean energy resource, reduce the important method of environment pollution.China's coal-bed gas aboundresources, 2011, China's gas pumping amount reached 115 × 108 m
3, wherein reach 92 × 108 m in down-hole mash gas extraction amount
3.
Because China's coal seam buried depth is large, coal seam is soft, and gas permeability is low, and major part belongs to and is difficult to extraction coal seam, if down-hole coal bed hole pumping and mining gas density is low, have impact on gas pumping effect, cause a large amount of gas not apply, directly be discharged in air, both contaminated environment, waste resource again.
According to extraction borehole hole-sealing technology conventional both at home and abroad at present, the impact of simple consideration sealing quality, the leakage path of extraction borehole generally has: hole sealing tube gas leakage, sealing material gas leakage, space gas leakage, boring relaxation zone gas leakage around between sealing material and drill hole wall, hole sealing depth is not enough coalmass crevasse gas leakage.According to current slip-casting hole-sealing method and hole-sealing technology, gas flow distribution rule and leakage path in combined hole, can be divided into 3 gas leakage point (or leak area) by extraction borehole Gas leak position: hole sealing tube gas leakage, the gas leakage of airtight quality difference, the gas leakage of hole sealing depth deficiency coalmass crevasse.
According to drilling gas flowing law and the gas leakage point regularity of distribution, if extraction borehole leaks gas, gas density must reduce.According to extraction borehole inside gas density size and distribution situation, extraction borehole sealing quality and Gas leak position can be judged, for improvement hole-sealing technology and sealing of hole parameter provide foundation, improve gas pumping effect.
Utility model content
The purpose of this utility model is to provide a kind of extraction borehole sealing quality detector, under the normal extraction state of extraction borehole, gather the device in Gas sample of assigned address in hole, measure gas density, analyze gas density in extraction borehole and, along the distribution situation of hole depth, judge Gas leak position and the sealing quality of extraction borehole, to improve hole-sealing technology and sealing of hole parameter, improve extracting result, reach the object improving gas density.
For achieving the above object, the utility model adopts following technical scheme: extraction borehole sealing quality detector, comprise casing, negative-pressure ejecting device and cylinder body is established in casing, casing is provided with pressure wind interface, the compressed air inlet of negative-pressure ejecting device is connected with pressure wind interface by tube connector, and pressure wind interface is connected with underground pressure air pipeline, piston is established in described cylinder body, cylinder body is provided with gas inlet successively, gas gas outlet and the ventilation opening be connected with the pumped gas entrance of negative-pressure ejecting device by the 3rd tracheae, described casing is provided with Sampling Interface, gas inlet connects the sampling pipe that can stretch in mash gas pumping drilling, and gas inlet also connects Sampling Interface by the first tracheae, the gas density analyzer that can be connected with Sampling Interface is provided with outside casing, gas gas outlet is connected with the 3rd tracheae by the second tracheae, sample detecting switch valve is provided with respectively on 3rd tracheae He on tube connector, second tracheae is connected on the 3rd tracheae between the 3rd tracheae up-sampling sense switch valve and ventilation opening, sampling pipe, first tracheae and the second tracheae are provided with one way valve respectively, sampling pipe is also provided with vacuum meter.
The mixed gas outlet of described negative-pressure ejecting device connects stack, and stack one end is stretched out outside casing.
Extraction borehole sealing quality detector described in the utility model, the underground pressure air pipeline of underground coal mine high pressure is utilized to drive the work of negative-pressure ejecting device, the negative pressure that negative-pressure ejecting device produces drives the piston in suction cylinder cylinder body to move to cylinder body right-hand member ventilation opening place, negative pressure region is created in the left side cylinder body of piston, when the negative pressure value of this negative pressure region is lower than negative pressure value in extraction borehole, methane gas in drainage holes just collects in the cylinder body of cylinder by sampling pipe, and successively through the second tracheae, the pumped gas entrance of negative-pressure ejecting device enters negative-pressure ejecting device, and from the mixed gas outlet and stack discharge casing of negative-pressure ejecting device.Ventilation opening can ensure that the negative pressure that negative-pressure ejecting device produces is attracted to cylinder body right-hand member piston from left end always, and ensures that the gas of assigned address in extraction borehole can enter in cylinder body continuously through sampling pipe.When after the device in Gas sample being full of flowing in cylinder body, press two sample detecting switching valves, cut off the connection of negative-pressure ejecting device and cylinder body, cut off tube connector air feed, negative-pressure ejecting device quits work, air pressure in negative-pressure ejecting device is higher than this air pressure of negative pressure region of cylinder body content nanowatt, under the effect of pressure reduction, piston in suction cylinder cylinder body moves to the gas inlet place of cylinder body left end, device in Gas sample in cylinder body is expelled to Sampling Interface and enters gas density analyzer by Sampling Interface, measure gas density, and be that gas sampling is next time ready.Extraction borehole sealing quality detector described in the utility model, under the normal extraction state of extraction borehole, gather the device in Gas sample of assigned address in hole, measure gas density, analyze gas density in extraction borehole and, along the distribution situation of hole depth, judge Gas leak position and the sealing quality of extraction borehole, to improve hole-sealing technology and sealing of hole parameter, improve extracting result, reach the effect improving gas density.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Extraction borehole sealing quality detector as shown in Figure 1, comprises casing 5, establishes negative-pressure ejecting device 6 and cylinder body 14 in casing 5.
Described negative-pressure ejecting device 6 is provided with mixed gas outlet, pumped gas entrance and compressed air inlet.Negative-pressure ejecting device 6 is prior art, therefore does not describe in detail.Casing 5 is provided with pressure wind interface 21, and the compressed air inlet of negative-pressure ejecting device 6 is connected with pressure wind interface 21 by tube connector 20, and pressure wind interface 21 is connected with underground pressure air pipeline 8; The mixed gas outlet of described negative-pressure ejecting device 6 connects stack 4, and stack 4 one end is stretched out outside casing 5, and certainly, on casing 5, corresponding stack 4 is provided with stack extending port, and stack 4 stretches out casing 5 from stack extending port.
The piston 13 that can vertically move along cylinder body 14 inwall is established in described cylinder body 14, cylinder body 14 and piston 13 form a suction cylinder, cylinder body 14 extends longitudinally, cylinder body 14 is longitudinally interval with gas inlet 15, gas gas outlet 19 and ventilation opening 12 successively, gas inlet 15 and ventilation opening 12 lay respectively at the two ends, left and right of cylinder body 14, and on cylinder body 14 sidewall of gas gas outlet 19 between gas inlet 15 and ventilation opening 12 and gas gas outlet 19 is positioned on the right side of the cylinder body 14 of ventilation opening 12.The length of the longitudinal length between gas gas outlet 19 and ventilation opening 12 and piston 13 is suitable, piston 13 be positioned at cylinder body 14 one end and enclosed ventilation mouth 12 time, gas gas outlet 19 and cylinder body 14 inner space.
Described casing 5 is provided with Sampling Interface 17, gas inlet 15 connects the sampling pipe 2 that can stretch in mash gas pumping drilling 1, and gas inlet 15 also connects Sampling Interface 17 by the first tracheae 18, be provided with the gas density analyzer 3 that can be connected with Sampling Interface 17 outside casing 5, gas density analyzer 3 is connected with Sampling Interface 17 by flexible pipe.Described sampling pipe 2 one end is stretched out outside casing 5, and certainly, on casing 5, corresponding sampling pipe 2 is provided with sampling pipe extending port, and sampling pipe 2 stretches out casing 5 from sampling pipe extending port.
Described ventilation opening 12 is connected with the pumped gas entrance of negative-pressure ejecting device 6 by the 3rd tracheae 9, gas gas outlet 19 is connected with the 3rd tracheae 9 by the second tracheae 11, be provided with respectively on the 3rd tracheae 9 that sample detecting switch valve 7, second tracheae 11 is connected between the 3rd tracheae 9 up-sampling sense switch valve 7 and ventilation opening 12 on 3rd tracheae 9 and on tube connector 20.Sample detecting switch valve 7 on described 3rd tracheae 9 and the sample detecting switch valve 7 on tube connector 20 form a pair linked switch valve, two sample detecting switch valves 7 can synchronously be opened by link gear, close synchronously, when two sample detecting switch valves 7 are pressed, 3rd tracheae 9 and tube connector 20 are all in closed circuit state, otherwise, when two sample detecting switch valves 7 pull up, 3rd tracheae 9 and tube connector 20 are all in channel status, the linked switch valve that two sample detecting switch valves 7 are formed is prior art, therefore does not describe in detail.
Sampling pipe 2, first tracheae 18 and the second tracheae 11 are provided with one way valve 10 respectively, sampling pipe 2 is also provided with vacuum meter 16, namely end direction sampling pipe 2 pointing to the gas inlet 15 of cylinder body 14 being provided with successively described vacuum meter 16 and described one way valve 10, first tracheae 18 is connected on the sampling pipe 2 on sampling pipe 2 between one way valve 10 and gas inlet 15.
Extraction borehole sealing quality detector described in the utility model, can detect the gas density of diverse location in coal bed gas extraction boring 1, its using method comprises the steps: that underground pressure air pipeline 8 is connected with the pressure wind interface 21 of casing 5 by (1).(2) sampling pipe 2 is extend into the position of specifying in mash gas pumping drilling 1, and install sealing device, connect extraction system.(3) open the pressure wind switch of underground pressure air pipeline 8, negative-pressure ejecting device 6 is started working, and is continuously extracted into specifying the methane gas of test point in the cylinder body 14 of suction cylinder by sampling pipe 2.(4) gas density measuring instrument is connected with the Sampling Interface 17 of casing 5.(5) press two sample detecting switching valves, sampling pipe 2 and the second tracheae 11 are in closed circuit state, and the device in Gas sample in cylinder body 14 is drained into gas density measuring instrument by Sampling Interface 17.(6) reading of gas density measuring instrument and vacuum meter 16 is observed, record measurement result.(7) change sampling pipe 2 stretches into the length in mash gas pumping drilling 1, records gas density and the negative pressure value of multiple sampled point in mash gas pumping drilling 1 continuously.
Extraction borehole sealing quality detector described in the utility model, the underground pressure air pipeline 8 of underground coal mine high pressure is utilized to drive negative-pressure ejecting device 6 to work, the negative pressure that negative-pressure ejecting device 6 produces drives the piston 13 in suction cylinder cylinder body 14 to move to cylinder body 14 right-hand member ventilation opening 12 place, negative pressure region is created in the left side cylinder body 14 of piston 13, when the negative pressure value of this negative pressure region is lower than negative pressure value in extraction borehole, methane gas in drainage holes just collects in the cylinder body 14 of cylinder by sampling pipe 2, and successively through the second tracheae 11, the pumped gas entrance of negative-pressure ejecting device 6 enters negative-pressure ejecting device 6, and discharge casing 5 from the mixed gas outlet of negative-pressure ejecting device 6 and stack 4.Ventilation opening 12 can ensure that the negative pressure that negative-pressure ejecting device 6 produces is attracted to cylinder body 14 right-hand member piston 13 from left end always, and ensures that the gas of assigned address in extraction borehole can enter in cylinder body 14 continuously through sampling pipe 2.When after the device in Gas sample being full of flowing in cylinder body 14, press two sample detecting switching valves, cut off the connection of negative-pressure ejecting device 6 and cylinder body 14, cut off tube connector 20 air feed, negative-pressure ejecting device 6 quits work, air pressure in negative-pressure ejecting device 6 is higher than this air pressure of negative pressure region of cylinder body 14 content nanowatt, both form pressure reduction, under the effect of pressure reduction, piston 13 in suction cylinder cylinder body 14 moves to gas inlet 15 place of cylinder body 14 left end, device in Gas sample in cylinder body 14 is expelled to Sampling Interface 17 and enters gas density analyzer 3 by Sampling Interface 17, measure gas density, and be that gas sampling is next time ready.
Claims (2)
1. extraction borehole sealing quality detector, it is characterized in that: comprise casing, establish negative-pressure ejecting device and cylinder body in casing, casing is provided with pressure wind interface, the compressed air inlet of negative-pressure ejecting device is connected with pressure wind interface by tube connector, and pressure wind interface is connected with underground pressure air pipeline, piston is established in described cylinder body, cylinder body is provided with gas inlet successively, gas gas outlet and the ventilation opening be connected with the pumped gas entrance of negative-pressure ejecting device by the 3rd tracheae, described casing is provided with Sampling Interface, gas inlet connects the sampling pipe that can stretch in mash gas pumping drilling, and gas inlet also connects Sampling Interface by the first tracheae, the gas density analyzer that can be connected with Sampling Interface is provided with outside casing, gas gas outlet is connected with the 3rd tracheae by the second tracheae, sample detecting switch valve is provided with respectively on 3rd tracheae He on tube connector, second tracheae is connected on the 3rd tracheae between the 3rd tracheae up-sampling sense switch valve and ventilation opening, sampling pipe, first tracheae and the second tracheae are provided with one way valve respectively, sampling pipe is also provided with vacuum meter.
2. extraction borehole sealing quality detector as claimed in claim 1, is characterized in that: the mixed gas outlet of described negative-pressure ejecting device connects stack, and stack one end is stretched out outside casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539906.6U CN204082135U (en) | 2014-09-19 | 2014-09-19 | Extraction borehole sealing quality detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539906.6U CN204082135U (en) | 2014-09-19 | 2014-09-19 | Extraction borehole sealing quality detector |
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| CN204082135U true CN204082135U (en) | 2015-01-07 |
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| CN201420539906.6U Active CN204082135U (en) | 2014-09-19 | 2014-09-19 | Extraction borehole sealing quality detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758681A (en) * | 2016-05-03 | 2016-07-13 | 国网山东省电力公司青州市供电公司 | Gas sample collector |
| CN106057061A (en) * | 2016-08-17 | 2016-10-26 | 西安科技大学 | Laboratory simulation system and method for coal mine gas extraction boring leakage position detection |
| CN110892240A (en) * | 2017-07-19 | 2020-03-17 | Gt线路有限公司 | Method for testing the tightness of transportable containers such as suitcases, trunks, cases and the like |
-
2014
- 2014-09-19 CN CN201420539906.6U patent/CN204082135U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758681A (en) * | 2016-05-03 | 2016-07-13 | 国网山东省电力公司青州市供电公司 | Gas sample collector |
| CN106057061A (en) * | 2016-08-17 | 2016-10-26 | 西安科技大学 | Laboratory simulation system and method for coal mine gas extraction boring leakage position detection |
| CN106057061B (en) * | 2016-08-17 | 2018-07-17 | 西安科技大学 | Coal mine gas extraction drill hole Gas leak position testing laboratory's simulation system and method |
| CN110892240A (en) * | 2017-07-19 | 2020-03-17 | Gt线路有限公司 | Method for testing the tightness of transportable containers such as suitcases, trunks, cases and the like |
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