CN208704966U - A kind of device of beam tube type fixed point detection gas density - Google Patents
A kind of device of beam tube type fixed point detection gas density Download PDFInfo
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- CN208704966U CN208704966U CN201821303329.5U CN201821303329U CN208704966U CN 208704966 U CN208704966 U CN 208704966U CN 201821303329 U CN201821303329 U CN 201821303329U CN 208704966 U CN208704966 U CN 208704966U
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Abstract
The utility model discloses the devices that a kind of beam tube type pinpoints detection gas density, solves the technical issues of gas density in fixed point detection extraction borehole, detection device includes beam tube, casing, drainage tube, sealing cover, gas collecting pump and methane Concentration Measurement instrument, beam tube is composed of a plurality of gas-guide tube, multiple sealing rings are provided in casing, casing is divided into multiple survey sections by sealing ring, multiple air inlets are provided on casing between two sealing rings, every gas-guide tube of beam tube extends respectively in different survey sections, sealing medium is full of between drainage tube and the hole wall of drilling, it is connected between drainage tube and gas collecting pump by hose, the gas density in multiple survey sections is detected respectively using above-mentioned detection device, the device has easy for installation, it is simple and reliable for structure, the advantages that measurement efficiency is high.
Description
Technical field
The utility model belongs to coal mining field of measuring technique, and inspection is pinpointed during especially a kind of coal mine gas drainage
Survey the device of gas density in extraction borehole.
Background technique
China's coal-mine production 93% is pit mining, and 70% or more coal mine is highly gassy mine.The gas in coal mining
It is the accompanying gas in coal seam, gas is the chief threat for influencing Safety of Coal Mine Production, while gas is also important the supplement energy,
And gas drainage is the major way of control of coalmine gas and coalbed gas in coal mine area exploitation.During gas drainage, guarantee to bore
The leakproofness in hole is to ensure the premise of drilling gas extraction efficiency and extraction concentration.
Extraction borehole is mainly sealed using polyurethane, expanding cement and other high molecular materials at present, but is a lack of
Fixed point, real-time detection means to borehole sealing quality, have differences so as to cause borehole sealing quality, cause the pumping of coal bed gas
The amount of adopting is high, and extraction efficiency and utilization rate are low, cause a large amount of coal bed gas that can not be utilized, Wu Fali since gas density is low
Gas, which is vented, causes environmental pollution.Gas extraction concentration is taken out as the important indicator for measuring borehole sealing quality, detection
The Gas leak position of borehole is specifically at aperture and interface tube, the either drilling of extraction line connection, sealing section medium, coal wall
The deep needs of falling hole are determined.Existing detection device is difficult to realize to different location gas density in fixed extraction borehole
Detection needs one kind can be to the equipment that extraction borehole different depth gas density is detected.
Utility model content
The technical issues of to solve different location gas density in accurate easy determination mash gas pumping drilling, this is practical new
Type provides a kind of device of beam tube type fixed point detection gas density, and specific technical solution is as follows:
A kind of device of beam tube type fixed point detection gas density, including beam tube, casing, drainage tube, sealing cover, gas collecting
Pump and methane Concentration Measurement instrument；For the beam tube in casing, described sleeve pipe passes through drainage tube, and the gas collecting pumps connecting sleeve
With methane Concentration Measurement instrument；The sealing cover includes external seal lid and interior sealing cover, and external seal lid and interior sealing cover seal respectively
The both ends of drainage tube；Multiple sealing rings are provided in described sleeve pipe, casing is divided into multiple survey sections by sealing ring, in two sealing rings
Between casing on be provided with multiple air inlets；The beam tube is composed of a plurality of gas-guide tube, every gas-guide tube point of beam tube
It does not extend in different survey sections.
Preferably, every gas-guide tube of beam tube is coated with different colors, and through-hole is provided on the sealing ring, and through-hole is straight
Diameter is equal with air guide pipe diameter.
It may further be preferable that gas-guide tube inlet end is arranged at the air inlet of casing, the outlet side of gas-guide tube is provided with
Air valve.
Preferably, the drilling outer end of drainage tube is arranged in external seal lid, and the brill of drainage tube is arranged in the interior sealing cover
Hole inner end, interior sealing cover are connected through a screw thread with drainage tube；Sleeve through hole, lead to the hole site setting are provided on the interior sealing cover
It is fluted, sealing ring is provided in groove, gasket is pressed on sealing ring, and clips compress gasket and are close to interior sealing cover.
Preferably, sealing ring is made by high-elastic silica gel, is coated with lute in sealing ring and casing-contact position.
Preferably, sealing medium is full of between drainage tube and the hole wall of drilling, between described sleeve pipe and gas collecting pump
It is connected by hose, the gas collecting pump is connect with methane Concentration Measurement instrument by hose.
It may further be preferable that the drilling outer end of drainage tube is provided with elbow bend, gas density is provided on drainage tube
Detection hole.
The beneficial effects of the utility model include:
(1) gas density is detected by using methane Concentration Measurement instrument, realize the detection to extraction quality and
Borehole sealing quality detection, it using a plurality of gas-guide tube, and divides multiple survey sections and successively measures gas density, to accurately determine
The gas density of extraction borehole different depth position.
(2) drainage tube both ends are sealed by sealing cover, are especially used in the position that casing passes through seal cover board
Sealing ring, gasket and clips are sealed to across position, ensure that the airtightness of device.
(3) casing is divided into multiple survey sections by using multiple sealing rings, air inlet is set on each casing for surveying section
Mouthful, every gas-guide tube is extended to respectively at the different air inlets for surveying section, is guaranteed through different gas-guide tubes to the different measurements for surveying section.
(4) drill the detection of interior gas density, and realized to extraction borehole deep gas density using the device
Detection, so that it is determined that drilling extraction efficiency.
(5) the advantages that device has easy for installation, simple and reliable for structure, and measurement efficiency is high realizes fixed fixed point inspection
It surveys, gas density measuring device structure simple material requires low, reduction measurement cost.
Detailed description of the invention
Fig. 1 is the device mounting structure schematic diagram of beam tube type fixed point detection gas density；
Fig. 2 is sleeve portion structural schematic diagram；
Fig. 3 is interior sealing cover mounting structure schematic diagram；
In figure: 1- beam tube；11- gas-guide tube；2- casing；21- air inlet；22- sealing ring；3- drainage tube；31- gas density
Detection hole；32- elbow bend；33- sealing medium；4- sealing cover；41- external seal lid；Sealing cover in 42-；421- sleeve through hole；
422- sealing ring；423- gasket；424- clips；5- gas collecting pump；51- hose；6- methane Concentration Measurement instrument.
Specific embodiment
In conjunction with described in Fig. 1 to Fig. 3, a kind of device of beam tube type fixed point detection gas density provided by the utility model is specific
Embodiment is as follows.
Embodiment 1
A kind of structure of the device of beam tube type fixed point detection gas density specifically includes beam tube 1, casing 2, drainage tube 3, close
Capping 4, gas collecting pump 5 and methane Concentration Measurement instrument 6.Beam tube 1 is arranged in casing 2 sleeve and wraps up, and casing 2 passes through extraction
Pipe 3, gas collecting pump 5 connecting sleeves and methane Concentration Measurement instrument 6, and sealing cover 4 includes external seal lid 41 and interior sealing cover 42, outside
Sealing cover 41 and interior sealing cover 42 are sealed in the both ends of drainage tube 3 respectively.It is situated between drainage tube 3 and the hole wall of drilling full of sealing
Matter 33, sealing medium 33 are led between casing 2 and gas collecting pump 5 using polyurethane, expanding cement or other high molecular materials
The connection of hose 51 is crossed, gas collecting pump 5 is connect with methane Concentration Measurement instrument 6 by hose 51, and drainage tube 3 is arranged in drilling outer end
There is elbow bend 32, methane Concentration Measurement hole 31 is provided on drainage tube 3.
Wherein, multiple sealing rings 22 are provided in casing 2, sealing ring 22 is made by high-elastic silica gel, in sealing ring
22 are coated with lute in 2 contact position of casing.Sealing ring 22 divides casing 2 for multiple survey sections, is determined according to the depth of drilling
The survey section number of division, premise are arranging a survey section, the cloth near interior sealing cover 42 close to drilling external opening attachment
A survey section is set, the drilling depth detected as needed outside drainage tube 3 takes the circumstances into consideration that 1~10 survey section is arranged.It is close in any two
In survey section between seal 22, multiple air inlets 21 are provided on casing 2, air inlet 21 is evenly distributed in the pipe week of casing 2
On.Beam tube 1 is composed of a plurality of gas-guide tube 11, and the quantity of gas-guide tube 11 is determined according to the quantity for surveying section, is surveyed segment number and is led
11 quantity of tracheae is equal, and every gas-guide tube 11 of beam tube 1 extends respectively in different survey sections, and the inlet end of beam tube 1 is close to air inlet
The setting of mouth position.Wherein 11 inlet end of gas-guide tube is arranged at the air inlet 21 of casing, and the outlet side of gas-guide tube 11 is provided with gas
Valve, air valve are in close state, and air valve is successively opened in detection process.Every gas-guide tube 11 of beam tube 1 is coated with different colors,
Through-hole is provided on sealing ring 22, through-hole diameter is equal with air guide pipe diameter.External seal lid is arranged in outside the drilling of drainage tube 3
The drilling inner end of drainage tube 3 is arranged in end, interior sealing cover 42, and interior sealing cover 42 is connected through a screw thread with drainage tube 3, interior sealing cover
Sleeve through hole is provided on 42, the setting of sleeve through hole position is fluted, sealing ring 422 is provided in groove, gasket 423 is pressed in
On sealing ring 422, clips 424 compress gasket 423 and are close to interior sealing cover.
Embodiment 2
For a kind of structure of the device of beam tube type fixed point detection gas density of further instruction, present embodiment discloses this
The specific structure of device and the method for carrying out methane Concentration Measurement using the device.
A kind of structure of the device of beam tube type fixed point detection gas density specifically includes beam tube 1, casing 2, drainage tube 3, close
Capping 4, gas collecting pump 5 and methane Concentration Measurement instrument 6.Beam tube 1 is arranged in casing 2 sleeve and wraps up, and casing 2 passes through extraction
Pipe, 5 connecting sleeve 2 of gas collecting pump and methane Concentration Measurement instrument 6, sealing cover 4 include external seal lid 41 and interior sealing cover 42, outside
Sealing cover 41 and interior sealing cover 42 are sealed in the both ends of drainage tube 3 respectively.Its middle sleeve 2 uses hard PVC pipe, as single PVC
Pvc pipe is connected using metal threaded steel connector when length of tube is inadequate；Gas-guide tube 11 uses semi-rigid PE tubes of material, drainage tube 3
Sealing medium 33 is full of between the hole wall of drilling, sealing medium 33 uses polyurethane, expanding cement or other macromolecule materials
Material.It is connected between casing 2 and gas collecting pump 5 by hose 51, gas collecting pump 5 passes through hose with methane Concentration Measurement instrument 6
51 connections, drainage tube 3 are provided with elbow bend 32 in drilling outer end, methane Concentration Measurement hole 31 are provided on drainage tube 3, wherein
Methane Concentration Measurement instrument 6 uses intrinsic safety type infrared gas concentration detector, and gas collecting pump 5 is pumped using negative-pressure type gas sample acquisition.
Multiple sealing rings 22 are provided in casing 2, sealing ring 22 is made by high-elastic silica gel, in sealing ring 22 and casing
2 contact positions are coated with lute in.Sealing ring 22 divides casing 2 for 7 survey sections, close to drilling external opening attachment arrangement one
A survey section is disposed about a survey section in interior sealing cover 42, and the drilling depth detected as needed outside drainage tube 3 takes the circumstances into consideration to be arranged
Survey section.In survey section between two sealing rings 22, multiple air inlets 21 are provided on casing 2, air inlet 21 is uniformly distributed
On the pipe week of casing 2.In the present embodiment, air inlet 21 at 7 are set on casing 2, the first air inlet A is arranged in drilling orifice
To the position of drainage tube one third length, the second air inlet B is arranged in drilling orifice to the position of 2/3rds length of drainage tube
It sets, the position of sealing cover 0.2m in distance is arranged in drainage tube in third air inlet C, and the 4th air inlet D is arranged outside drainage tube
The position of sealing cover 2m in distance, the 6th air inlet is arranged in outside drainage tube in position apart from interior sealing cover 1m, the 5th air inlet E
The position of sealing cover 5m in distance is arranged in outside drainage tube in F, and sealing cover 8m in distance is arranged in outside drainage tube in the 7th air inlet G
Position.Beam tube 1 is composed of 7 gas-guide tubes, and every gas-guide tube 11 of beam tube 1 extends respectively in different survey sections, beam tube 1
Inlet end is positioned close to 21 position of air inlet, is convenient for Rapid inhalation.Wherein the air inlet of casing is arranged in 11 inlet end of gas-guide tube
At mouth 21, the outlet side of gas-guide tube 11 is provided with air valve, and air valve is in close state, and air valve is successively opened in detection process.Beam
Every gas-guide tube 11 of pipe 1 can be coated with the different number of different color or mark for distinguishing, and be arranged on sealing ring 22
There is through-hole, through-hole diameter is equal with air guide pipe diameter.The drilling outer end of drainage tube is arranged in external seal lid 41, and interior sealing cover 42 is set
It sets in the drilling inner end of drainage tube 3, interior sealing cover 42 is connected through a screw thread with drainage tube 3, is provided with casing on interior sealing cover 42
Through-hole, the setting of sleeve through hole position is fluted, and sealing ring 422 is provided in groove, and gasket 423 is pressed on sealing ring 422, Gu
Surely 424 compression gasket 423 of hoop is close to interior sealing cover.
Carry out methane Concentration Measurement using a kind of device of above-mentioned beam tube type fixed point detection gas density the following steps are included:
1. measuring the original methane gas concentration Q in coal seamIt is former；
2. assembling the device of beam tube type fixed point detection mash gas pumping drilling Gas leak position, and it is inserted into mash gas pumping drilling；
Wherein, the device of assembling beam tube type fixed point detection mash gas pumping drilling Gas leak position specifically includes: by measuring point sequentially by the beam
The a plurality of gas-guide tube and sealing ring of pipe are in turn mounted in casing, install interior sealing cover and external seal lid, connection gas collecting pump
With methane Concentration Measurement instrument.
3. starting mash gas extraction by the drainage tube, the gas density on drainage tube is examined using methane Concentration Measurement instrument
Gas density at gaging hole is detected, and gas density Q is obtainedO；
4. closing the air valve on all gas-guide tubes, the air valve on every gas-guide tube is then successively opened, opens gas collecting
Pump records each gas density for surveying section respectively, is inwardly successively recorded as Q from hellA、QB、QC、QD、QE、QFAnd QG；
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, are also answered
Belong to the protection scope of the utility model.
Claims (7)
1. a kind of device of beam tube type fixed point detection gas density, which is characterized in that including beam tube, casing, drainage tube, sealing
Lid, gas collecting pump and methane Concentration Measurement instrument；For the beam tube in casing, described sleeve pipe passes through drainage tube, and the gas is adopted
Collection pump connecting sleeve and methane Concentration Measurement instrument；The sealing cover includes external seal lid and interior sealing cover, external seal lid and interior close
Capping seals the both ends of drainage tube respectively；Multiple sealing rings are provided in described sleeve pipe, casing is divided into multiple survey sections by sealing ring,
Multiple air inlets are provided on casing between two sealing rings；The beam tube is composed of a plurality of gas-guide tube, beam tube
Every gas-guide tube extends respectively in different survey sections.
2. a kind of device of beam tube type fixed point detection gas density according to claim 1, which is characterized in that the beam tube
Every gas-guide tube be coated with different colors, through-hole is provided on the sealing ring, through-hole diameter is equal with air guide pipe diameter.
3. a kind of device of beam tube type fixed point detection gas density according to claim 2, which is characterized in that the air guide
Pipe inlet end is arranged at the air inlet of casing, and the outlet side of gas-guide tube is provided with air valve.
4. a kind of device of beam tube type fixed point detection gas density according to claim 1, which is characterized in that described outer close
The drilling outer end of drainage tube is arranged in capping, and the drilling inner end of drainage tube, interior sealing cover and extraction is arranged in the interior sealing cover
Pipe is connected through a screw thread；Sleeve through hole is provided on the interior sealing cover, lead to the hole site setting is fluted, is provided in groove close
Seal ring, gasket are pressed on sealing ring, and clips compress gasket and are close to interior sealing cover.
5. a kind of device of beam tube type fixed point detection gas density according to claim 1, which is characterized in that the sealing
Circle is made by high-elastic silica gel, is coated with lute in sealing ring and casing-contact position.
6. a kind of device of beam tube type fixed point detection gas density according to claim 1, which is characterized in that the extraction
It is full of sealing medium between pipe and the hole wall of drilling, is connected between described sleeve pipe and gas collecting pump by hose, the gas
Acquisition pump is connect with methane Concentration Measurement instrument by hose.
7. a kind of device of beam tube type fixed point detection gas density according to claim 6, which is characterized in that the extraction
The drilling outer end of pipe is provided with elbow bend, and methane Concentration Measurement hole is provided on drainage tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303329.5U CN208704966U (en) | 2018-08-14 | 2018-08-14 | A kind of device of beam tube type fixed point detection gas density |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303329.5U CN208704966U (en) | 2018-08-14 | 2018-08-14 | A kind of device of beam tube type fixed point detection gas density |
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| CN208704966U true CN208704966U (en) | 2019-04-05 |
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| CN201821303329.5U Active CN208704966U (en) | 2018-08-14 | 2018-08-14 | A kind of device of beam tube type fixed point detection gas density |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156047A (en) * | 2020-01-08 | 2020-05-15 | 河南工程学院 | Gas extraction device for preventing coal and gas outburst |
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2018
- 2018-08-14 CN CN201821303329.5U patent/CN208704966U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156047A (en) * | 2020-01-08 | 2020-05-15 | 河南工程学院 | Gas extraction device for preventing coal and gas outburst |
| CN111156047B (en) * | 2020-01-08 | 2021-09-14 | 河南工程学院 | Gas extraction device for preventing coal and gas outburst |
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