CN105571663A - Single gas extraction borehole small flow testing device based on smoke particle migration - Google Patents
Single gas extraction borehole small flow testing device based on smoke particle migration Download PDFInfo
- Publication number
- CN105571663A CN105571663A CN201610087184.9A CN201610087184A CN105571663A CN 105571663 A CN105571663 A CN 105571663A CN 201610087184 A CN201610087184 A CN 201610087184A CN 105571663 A CN105571663 A CN 105571663A
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- CN
- China
- Prior art keywords
- smoke particle
- infrared light
- flow
- gas
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
Abstract
The invention discloses a single gas extraction borehole small flow testing device based on smoke particle migration and relates to the field of large-pipe-diameter small-flow testing. The device comprises a smoke particle generator, a smoke particle release pipe, a light signal receiver and an infrared light generator which are installed on a base pipeline. In the process that gas is extracted from a borehole, gas flow is generated in the base pipeline to drive smoke particles to flow, smoke particle arrival time is detected through two smoke particle detection devices, and the flow of mixed gas in the single extraction borehole is solved according to the installation gap of the detection devices and the section of the base pipeline. By means of a time control device and a storage device, flow testing and recording are alternately carried out, and accordingly continuous measurement of flow of the single gas extraction hole is achieved.
Description
Technical field
The present invention relates to Large Diameter Pipeline low discharge field tests, be applicable to the test of coal mine gas extraction borehole single hole low discharge.
Background technology
Extraction is the measure that effects a permanent cure of coal-mine gas diaster prevention and control, and be also one of colliery lasting exploit main contents, wherein coal mine down-hole drilling is the main contents realizing mash gas extraction.Hole pumping and mining gas needs statistics extraction amount, and common way is gas density in test extraction pipeline and mixed traffic, and for extraction main or arm, this method is all feasible, but for extraction borehole single hole, this method exists certain difficulty.Its main cause is coal body release gas is a process for decay, the coal body release gas of new exposure is obeyed negative exponent relation in time and is declined fast, when release areas coal body is by mining influence, its release gas can become complicated, specifically how to change at present because having no way of finding out about it without accurate-metering device to the test of single hole gas flow.In addition, for analyzing the parameters such as the hole-sealing technology of one borehole, sealing of hole parameter and extraction negative pressure to the impact of hole pumping and mining gas, also need to investigate single hole mash gas extraction situation, these all need to carry out accurate-metering to one borehole gas flow.
But because one borehole extraction process gas flow is unstable, and flow is less, and traditional orifice flowmeter, ultrasonic flow meter and turbo flow meter etc. are difficult to test.And be usually used in the situation that the soap-foam flowmeter of low discharge and suspended body flowmeter are applicable to pipe with small pipe diameter usually, and be unfavorable for off and on and change the follow-on test of mash gas pumping drilling frequently.It is the difficult problem perplexing current control of coalmine gas that the gas pumping single hole flow of Large Diameter Pipeline low discharge is accurately tested.
Summary of the invention
For realizing the accurate-metering of coal mine gas extraction borehole single hole low discharge, the present invention proposes a kind of mash gas pumping drilling single hole low discharge proving installation based on smoke particle migration.
This apparatus structure as shown in Figure 1, by base tubing 1, the smoke particle generating means that smoke particle generator 2 and smoke particle releasing tube 3 form, and two groups of proving installations that optical signal receiver 4 and infrared light generator 5 form are formed.
The smoke particle that smoke particle generator produces enters base tubing through smoke particle release pipeline, the proving installation that two infrared light generators and receiver successively through downstream under gas in pipelines flowing drives form, test smoke particle is respectively by the time of two proving installations, in conjunction with installing space and the base tubing internal diameter parameter of two proving installations, calculate the mixed traffic of methane gas in base tubing.
In order to eliminate when smoke particle flows out in smog releasing tube, flow velocity is on the impact of test result, and the smog release mouth of pipe is met air-flow in base tubing and carried out flow path direction.
The present invention utilizes smoke particle to detect smoke particle to the scattering process of infrared light and whether arrives test point, thus air-flow in indirectly testing base tubing, principle is simple, and accuracy is high.
Accompanying drawing explanation
Fig. 1 is a kind of mash gas pumping drilling single hole low discharge proving installation based on smoke particle migration.
Number in the figure: 1-base tubing, 2-smoke particle generator, 3-smoke particle releasing tube, 4-optical signal receiver, 5-infrared light generator.
Embodiment
As shown in Figure 1, a kind of mash gas pumping drilling single hole low discharge proving installation based on smoke particle migration comprises base tubing 1, the smoke particle generating means that smoke particle generator 2 and smoke particle releasing tube 3 form, and two groups of proving installations of optical signal receiver 4 and infrared light generator 5 composition.
After a kind of mash gas pumping drilling single hole low discharge proving installation based on smoke particle migration is installed, when forming negative pressure in extraction pipeline, leaking out around gas and coal body in coal body and entering after in base tubing, forming air-flow, produce flow.When testing this flow, start smoke particle generator 2 by control device, constant produces smoke particle, and smoke particle is entered in base tubing 1 by smoke particle releasing tube 3.Meanwhile, start proving installation and infrared light generator and optical signal receiver, when smoke particle is in base tubing under airflow function, first proving installation through releasing tube downstream, by the scattering process of smoke particle, the infrared light of optical signal receiver collection dies down, now as smoke particle arrive signal, writing time t
1.When second, releasing tube downstream proving installation detects smoke particle, writing time t
2, the mistiming t of smoke particle is detected according to mounting distance L (m) of two proving installations and two proving installations
2-t
1s (), can calculate the mean flow rate v=L/ (t of smoke particle
2-t
1).In conjunction with the basal area S (m of base tubing
2) hole pumping and mining gas mixed traffic Q=60LS/ (t can be obtained
2-t
1) m/min, and testing result is recorded in the internal memory of the optical signal receiver of second proving installation.
The control chip separated in time t utilizing smoke particle generator, infrared light generator and optical signal receiver built-in repeats above-mentioned test process, thus realizes the continuity of test.
Claims (5)
1., based on a mash gas pumping drilling single hole low discharge proving installation for smoke particle migration, it is characterized in that: device is made up of the smoke particle generator be installed in base tubing, smoke particle releasing tube, infrared light generator and optical signal receiver.
2. the smoke particle generator for Test bench gas in pipelines flow according to claims 1, is characterized in that: produce smoke particle, smoke particle discharges through smoke particle releasing tube.
3. the smoke particle releasing tube according to claims 1, is characterized in that: be fixed in base tubing, and control smoke particle and weigh release, the liberation port of releasing tube is met gas in base tubing and carried out flow path direction.
4. the infrared light generator according to claims 1, it is characterized in that: be fixed in base tubing, the infrared light that three infrared light generators send converges at its opposite receiver, and conduit section average mark is slit into four area equation regions by three beams infrared light.
5. the optical signal receiver according to claims 1, it is characterized in that: the base tubing being fixed on the corresponding opposite side of infrared light generator, the light signal that infrared light generator sends can be accepted, and export electric signal according to the power of light signal, and built-in chip and memory module is utilized to carry out calculating to signal and store.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610087184.9A CN105571663A (en) | 2016-02-16 | 2016-02-16 | Single gas extraction borehole small flow testing device based on smoke particle migration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610087184.9A CN105571663A (en) | 2016-02-16 | 2016-02-16 | Single gas extraction borehole small flow testing device based on smoke particle migration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105571663A true CN105571663A (en) | 2016-05-11 |
Family
ID=55882060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610087184.9A Pending CN105571663A (en) | 2016-02-16 | 2016-02-16 | Single gas extraction borehole small flow testing device based on smoke particle migration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105571663A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003130703A (en) * | 2001-10-19 | 2003-05-08 | National Institute Of Advanced Industrial & Technology | Current meter |
| US20090216463A1 (en) * | 2005-05-28 | 2009-08-27 | Schlumberger Technology Corporation | Devices and methods for quantification of liquids in gas-condensate wells |
| CN101910803A (en) * | 2008-01-17 | 2010-12-08 | 三菱重工业株式会社 | Fluid measuring device |
| CN102156112A (en) * | 2011-03-08 | 2011-08-17 | 中国科学院安徽光学精密机械研究所 | Flue gas flow velocity measuring device and method |
| CN103221828A (en) * | 2010-11-16 | 2013-07-24 | 朴正翼 | Gas flow meter and method for measuring velocity of gas |
-
2016
- 2016-02-16 CN CN201610087184.9A patent/CN105571663A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003130703A (en) * | 2001-10-19 | 2003-05-08 | National Institute Of Advanced Industrial & Technology | Current meter |
| US20090216463A1 (en) * | 2005-05-28 | 2009-08-27 | Schlumberger Technology Corporation | Devices and methods for quantification of liquids in gas-condensate wells |
| CN101910803A (en) * | 2008-01-17 | 2010-12-08 | 三菱重工业株式会社 | Fluid measuring device |
| CN103221828A (en) * | 2010-11-16 | 2013-07-24 | 朴正翼 | Gas flow meter and method for measuring velocity of gas |
| CN102156112A (en) * | 2011-03-08 | 2011-08-17 | 中国科学院安徽光学精密机械研究所 | Flue gas flow velocity measuring device and method |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国公安部消防局: "《中国消防手册.第十二卷.消防装备•消防产品》", 31 December 2007, 上海科学技术出版社 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |