CN111123401A - Shallow harmful gas detection equipment - Google Patents
Shallow harmful gas detection equipment Download PDFInfo
- Publication number
- CN111123401A CN111123401A CN201911419041.3A CN201911419041A CN111123401A CN 111123401 A CN111123401 A CN 111123401A CN 201911419041 A CN201911419041 A CN 201911419041A CN 111123401 A CN111123401 A CN 111123401A
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- valve
- inner rod
- rod
- cross beam
- harmful gas
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims description 15
- 241001669679 Eleotris Species 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 42
- 238000000034 method Methods 0.000 description 11
- 238000001914 filtration Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
Abstract
The invention provides a shallow harmful gas detection device, and particularly relates to the field of geological detection devices.A counter-force device is arranged at two ends of a cross beam, and the counter-force devices fix the two ends of the cross beam; hydraulic cylinders are symmetrically arranged on the cross beam, and supporting beams are arranged at the top ends of the hydraulic cylinders; be equipped with probe rod on the supporting beam, its characterized in that: an inner rod is arranged in the probe rod, the inner rod is of a hollow structure, and a through hole is formed in the side wall of the inner rod; the bottom of the inner rod is provided with a drill bit; the upper end of the inner rod is connected with a hose, one end of the hose is connected with the upper end of the inner rod through a stop valve, the other end of the hose is connected with the lower part of a filter tank through a first valve, and water is filled in the filter tank; the upper end of the filter tank is respectively provided with a second valve and an emptying pipe; a fourth valve and a third valve are sequentially and respectively arranged on the emptying pipe, and an air pressure meter and a flow meter are arranged between the fourth valve and the third valve; the top of the emptying pipe is communicated with the outside. The invention has the advantages of simple structure, convenient operation, economy and practicality and accurate detection result.
Description
Technical Field
The invention belongs to the field of geological detection devices, and particularly relates to shallow harmful gas detection equipment.
Background
The problem of shallow layer harmful gas explosion is one of common accidents in the geotechnical engineering construction process. Research on shallow harmful gases is almost all around the energy industry, and there is a lack of special research aimed at engineering construction. The influence of domestic shallow harmful gas on engineering is mainly distributed in the area of Yangtze river delta. Research on hazards of harmful gases in shallow layers stored in shallow strata from deep migration is still in the beginning stage at present.
At present, the domestic underground harmful gas exploration method mainly refers to mining engineering of mines, petroleum, natural gas and the like and the experience of foreign similar urban underground engineering, the harmful gas exploration is mainly carried out from the aim of disaster prevention, the harm of the harmful gas to the engineering construction cannot be avoided, the exploration and measurement requirements on the underground harmful gas are higher, and a more reliable and higher-precision exploration method needs to be adopted to measure the concentration, the pressure, the flow and the like of the gas so as to prevent the harmful gas from getting into the bud.
At present, the investigation method of the gas in the soil mainly comprises 5 methods: measuring the gas concentration in the hole through the hole opening; sampling water in the pores; gas-liquid separation; a mud water layer detection method; BAT system method. The above 5 methods are all derived from related practical experience of mining engineering, and the BAT system method with higher precision is adopted for measurement abroad, but the instrument has a complex structure and is difficult to operate, and no manufacturer produces the equipment at home.
In view of the above, in order to clearly check the buried depth, pressure, flow rate and gas composition of the shallow harmful gas, a simple and feasible shallow harmful gas detection device is needed.
Disclosure of Invention
The invention aims to provide shallow harmful gas detection equipment which has the advantages of simple structure, convenience in operation, economy and practicability and accurate detection result.
The invention provides the following technical scheme:
the shallow harmful gas detection equipment comprises a probe rod and a static sounding device, wherein the static sounding device comprises a cross beam, two ends of the cross beam are provided with counterforce devices, and the counterforce devices fix the two ends of the cross beam; hydraulic cylinders are symmetrically arranged on the cross beam, and supporting beams are arranged at the top ends of the hydraulic cylinders; the supporting beam is provided with a probe rod, an inner rod is arranged in the probe rod, the inner rod is of a hollow structure, and the side wall of the inner rod is provided with a through hole; a drill bit is arranged at the bottom of the inner rod;
the upper end of the inner rod is connected with a hose, one end of the hose is connected with the upper end of the inner rod through a stop valve, the other end of the hose is connected with the lower part of a filter tank through a first valve, and water is filled in the filter tank; the upper end of the filter tank is respectively provided with a second valve and an emptying pipe; a fourth valve and a third valve are sequentially and respectively arranged on the emptying pipe, and an air pressure meter and a flow meter are arranged between the fourth valve and the third valve; the top of the emptying pipe is communicated with the outside.
Preferably, the lower end of the inner rod is in threaded connection with the drill bit, and the probe rod is abutted against the edge of the drill bit; the probe rods are connected through threads to extend; the inner rods are connected through threads to achieve extension of the inner rods.
Preferably, the filter screen is wrapped outside the lower end of the inner rod.
Preferably, the top of the two ends of the cross beam is provided with a pressing beam and a screw rod, the pressing beam is of a hollow structure, the screw rod penetrates through the pressing beam, the lower end of the screw rod is of an expanding structure, the upper end of the bolt is provided with a limiting plate, and the limiting plate and the pressing beam are mutually blocked.
Preferably, sleepers are arranged on the lower sides of the two ends of the cross beam, and the direction of each sleeper is perpendicular to the direction of the cross beam.
Preferably, the lower extreme of crossing the filter tank is equipped with the support frame, the support frame includes a plurality of rings, the periphery of ring is equipped with the ring and is listed as there is the bracing piece, the bracing piece is arranged along vertical direction, cross the filter tank and locate in the ring, the bottom of crossing the filter tank is equipped with the support ring, the diameter of support ring is less than cross the diameter of filter tank, the support ring with the bracing piece is connected.
The invention has the beneficial effects that:
the static sounding device is provided with the counterforce devices through two ends of the cross beam, and the counterforce devices fix the two ends of the cross beam; hydraulic cylinders are symmetrically arranged on the cross beam, and supporting beams are arranged at the top ends of the hydraulic cylinders; the supporting beam is provided with a probe rod, an inner rod is arranged in the probe rod, the inner rod is of a hollow structure, and the side wall of the inner rod is provided with a through hole; the bottom of the inner rod is provided with a drill bit; the upper end of the inner rod is connected with a hose, one end of the hose is connected with the upper end of the inner rod through a stop valve, the other end of the hose is connected with the lower part of a filter tank through a first valve, and water is filled in the filter tank; the upper end of the filter tank is respectively provided with a second valve and an emptying pipe; a fourth valve and a third valve are sequentially and respectively arranged on the emptying pipe, and an air pressure meter and a flow meter are arranged between the fourth valve and the third valve; the top of the emptying pipe is communicated with the outside, and the emptying pipe has the advantages of simple structure, convenient operation, economy and practicality and accurate detection result.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a diagram of the structure of the probe;
labeled as: 1. the system comprises a drill bit, a filter screen, a probe rod, a counter-force device, a sleeper, a static sounding device, a first stop valve, a hose, water, a filter tank, a pressure gauge, a flow gauge and a stop valve, wherein the filter screen is 2, the probe rod is 3, the counter-force device is 4, the sleeper is 5, the static sounding device is 6, the first stop valve is 7, the hose is 8, the water is 9, the filter tank is 10, the pressure; 14. a cross beam; 15. a hydraulic cylinder; 16. a support beam; 17. pressing the beam; 18. a screw; 19. a circular ring; 20. a support bar; 21. an inner rod.
Detailed Description
Referring to fig. 1 to 3, the shallow harmful gas detection equipment comprises a probe rod 3 and a static sounding device 6, wherein the static sounding device 6 comprises a beam 14, two ends of the beam 14 are provided with reaction devices 4, and the two ends of the beam 14 are fixed by the reaction devices 4; hydraulic cylinders 15 are symmetrically arranged on the cross beam 14, and supporting beams 16 are arranged at the top ends of the hydraulic cylinders 15; the supporting beam 16 is provided with a probe rod 8, an inner rod 21 is arranged inside the probe rod 8, the inner rod 21 is of a hollow structure, and the side wall of the inner rod 21 is provided with a through hole; the bottom of the inner rod 21 is provided with a drill bit 1; the upper end of the inner rod 21 is connected with a hose 8, one end of the hose 8 is connected with the upper end of the inner rod 21 through a stop valve 13, the other end of the hose 8 is connected with the lower part of a filter tank 10 through a first valve, and water 9 is filled in the filter tank 10; the upper end of the filter tank 10 is respectively provided with a second valve and an emptying pipe; a fourth valve and a third valve are sequentially and respectively arranged on the emptying pipe, and a barometer 11 and a flow meter 12 are arranged between the fourth valve and the third valve; the top of the emptying pipe is communicated with the outside. The improvement point of the application is that how to press the feeler lever into the ground is not needed, and the pressing structure of the static sounding device with the traditional structure is adopted, and the pressing structure is common general knowledge of business, and the specific structure is not repeated;
wherein, the lower end of the inner rod 21 is connected with the drill bit 1 through threads, and the feeler lever 3 is abutted against the edge of the drill bit 1; the probe rods 3 are connected through threads to extend the probe rods; the inner rods 21 are connected through threads to realize the extension of the inner rods 21. The lower end of the inner rod 21 is externally wrapped with a filter screen 2. The upper portions of two ends of the cross beam 14 are provided with a pressing beam 17 and a screw rod 18, the pressing beam 17 is of a hollow structure, the screw rod 18 penetrates through the pressing beam 17, the lower end of the screw rod 18 is of an expanding structure, the upper end of the bolt 18 is provided with a limiting plate, and the limiting plate and the pressing beam 17 are mutually blocked. Sleepers 5 are arranged on the lower sides of two ends of the cross beam 14, and the direction of the sleepers 5 is perpendicular to the direction of the cross beam 14. The lower extreme of filtering jar 10 is equipped with the support frame, and the support frame includes a plurality of rings 19, and the periphery of ring 19 is equipped with the ring and is listed as bracing piece 20, and bracing piece 20 is arranged along vertical direction, filters jar 10 and locates in the ring 19, and the bottom of filtering jar 10 is equipped with the support ring, and the diameter of support ring is less than the diameter of filtering jar 10, and the support ring is connected 20 with the bracing piece.
As shown in fig. 1 to 3, the present invention works as follows:
the probe of the device adopts a special air probe which is chiseled, the probe rod is hollow, the inner wall of the probe rod is wrapped by a layer of filter screen, the top end of the probe rod is connected with a glass filter tank through a rubber pipe through a valve 1, and a certain amount of water is injected into the tank to filter redundant slurry. The tank top is provided with an air release valve 4 which is connected with an air pressure meter and a flow meter so as to find the buried depth of the top and bottom plates of the gas-containing soil layer and the gas pressure and flow parameters. The discharged waste gas is ignited and combusted through a nozzle through a valve 3 so as not to pollute the atmosphere. Meanwhile, a gas sample is accessed for component analysis, gas exhaust observation is carried out, an observation curve is drawn, and the approximate condition of gas distribution is ascertained;
the specific construction process is as follows:
1. the probe rod is pressed into the ground, whether gas is sprayed out from the top of the probe rod is observed, and the JL269 series combustible gas leak detector is used for distinguishing.
2. If there is gas ejection, the initial depth Ha of gas ejection is recorded, and the pressure is continued until the gas is not ejected any more, and the final depth Hb is recorded.
3. And after the probe rod presses the human body until the gas is not sprayed out and exceeds the shield bottom plate by 5m, the probe rod starts to pull up until the gas stops at the depth of (Ha + Hb)/2, and the depth of (Ha + Hb)/2 is taken as the observation depth.
4. The valves 1 and 4 are opened, and the valves 2 and 3 are closed. After standing for 5min, an initial barometer reading P0 was recorded.
5. Valve 3 is opened and the bleed is started and the initial meter reading K0 is recorded.
6. The barometer and flow meter readings were then taken every 30min and recorded. And continuously observing for not less than 10h until the gas pressure is less than 0.05MPa, and finishing the test.
7. The recorded air pressure and flow data are measured values and are not corrected.
The results of the harmful gas investigation are shown in Table 1
The specific implementation process comprises the following steps:
1. the sleepers 5 are fixed on the ground, and the counterforce device 4 is fixed under the ground, so that the static sounding device 6 has good stability.
2. The filtering tank 10 is placed on the ground, and water 9 is filled in the tank to play a role in filtering redundant slurry.
3. And starting the static sounding device 6, and driving the probe 1 to drill into the soil by the probe rod 3 through a hydraulic device. Under the combined action of the counterforce device 4 and the sleeper 5, the static sounding device 6 can be kept stable in the whole working process.
4. After probe 1 reachd the predetermined degree of depth, close static sounding device 6, open first stop valve 7, close stop valve 13 for the cavity inner chamber of probe rod 3 communicates with each other with external atmosphere, then pull out on driving probe rod 3 through static sounding device 6, if contain gas in the soil layer, under the effect of pressure difference, gas overflows from first stop valve 7 through probe rod 3's inner chamber after through the filtration of filter screen 2, detect through JL269 series combustible gas leak detector this moment, and record initial degree of depth.
5. The filter tank 10 is connected through the hose 8, the first stop valve 7 is closed, the stop valve 13 and the valve 1 are opened, the valves 2 and 3 are closed, the valve 4 is opened, and relevant parameters of the gas are tested and recorded.
6. After standing for 5min, the initial reading of the barometer is recorded, then the valve 3 is opened, deflation is started, and the initial reading of the flow meter is recorded and well recorded.
7. A double-valve aluminum foil sampling bag is connected at the position of the valve 2 through a hose, the valve 3 and the valve 4 are closed, the valve 2 is opened to collect gas, and then the gas is sent to a professional detection mechanism for component analysis.
8. The valve 3 is opened to discharge the exhaust gas, and the exhaust gas is ignited to burn so as not to pollute the atmosphere.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The shallow harmful gas detection equipment comprises a probe rod and a static sounding device, wherein the static sounding device comprises a cross beam, two ends of the cross beam are provided with counterforce devices, and the counterforce devices fix the two ends of the cross beam; hydraulic cylinders are symmetrically arranged on the cross beam, and supporting beams are arranged at the top ends of the hydraulic cylinders; be equipped with probe rod on the supporting beam, its characterized in that: an inner rod is arranged in the probe rod, the inner rod is of a hollow structure, and a through hole is formed in the side wall of the inner rod; a drill bit is arranged at the bottom of the inner rod;
the upper end of the inner rod is connected with a hose, one end of the hose is connected with the upper end of the inner rod through a stop valve, the other end of the hose is connected with the lower part of a filter tank through a first valve, and water is filled in the filter tank; the upper end of the filter tank is respectively provided with a second valve and an emptying pipe; a fourth valve and a third valve are sequentially and respectively arranged on the emptying pipe, and an air pressure meter and a flow meter are arranged between the fourth valve and the third valve; the top of the emptying pipe is communicated with the outside.
2. The shallow harmful gas detection apparatus according to claim 1, wherein: the lower end of the inner rod is in threaded connection with the drill bit, and the probe rod is abutted to the edge of the drill bit; the probe rods are connected through threads to extend; the inner rods are connected through threads to achieve extension of the inner rods.
3. The shallow harmful gas detection apparatus according to claim 2, wherein: the outer portion of the lower end of the inner rod is wrapped with a filter screen.
4. The shallow harmful gas detection apparatus according to claim 3, wherein: the improved bolt is characterized in that a pressing beam and a screw rod are arranged above two ends of the cross beam, the pressing beam is of a hollow structure, the screw rod penetrates through the pressing beam, the lower end of the screw rod is of an expanding structure, a limiting plate is arranged at the upper end of the bolt, and the limiting plate and the pressing beam are mutually blocked.
5. The shallow harmful gas detection apparatus according to claim 4, wherein: and sleepers are arranged on the lower sides of the two ends of the cross beam, and the direction of each sleeper is perpendicular to the direction of the cross beam.
6. The shallow harmful gas detection apparatus according to claim 5, wherein: the lower extreme of crossing the jar is equipped with the support frame, the support frame includes a plurality of rings, the periphery of ring is equipped with the ring and is listed as there is the bracing piece, the bracing piece is arranged along vertical direction, it locates in the ring to cross the jar, the bottom of crossing the jar is equipped with the support ring, the diameter of support ring is less than cross the diameter of jar, the support ring with the bracing piece is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419041.3A CN111123401A (en) | 2019-12-31 | 2019-12-31 | Shallow harmful gas detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419041.3A CN111123401A (en) | 2019-12-31 | 2019-12-31 | Shallow harmful gas detection equipment |
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| Publication Number | Publication Date |
|---|---|
| CN111123401A true CN111123401A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911419041.3A Pending CN111123401A (en) | 2019-12-31 | 2019-12-31 | Shallow harmful gas detection equipment |
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| Country | Link |
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| CN (1) | CN111123401A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201225967Y (en) * | 2008-06-03 | 2009-04-22 | 浙江省地矿勘察院 | Tester for exploring underground shallow layer harmful gas |
| CN107421816A (en) * | 2017-08-10 | 2017-12-01 | 北京林业大学 | A kind of stratum splitting drag Rapid measuring and its assay method |
| CN110578498A (en) * | 2019-08-12 | 2019-12-17 | 浙江大学 | Self-adaptive air release rod and shallow layer air controlled air release recovery system and method |
| CN211402790U (en) * | 2019-12-31 | 2020-09-01 | 江苏南京地质工程勘察院 | Shallow harmful gas detection equipment |
-
2019
- 2019-12-31 CN CN201911419041.3A patent/CN111123401A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201225967Y (en) * | 2008-06-03 | 2009-04-22 | 浙江省地矿勘察院 | Tester for exploring underground shallow layer harmful gas |
| CN107421816A (en) * | 2017-08-10 | 2017-12-01 | 北京林业大学 | A kind of stratum splitting drag Rapid measuring and its assay method |
| CN110578498A (en) * | 2019-08-12 | 2019-12-17 | 浙江大学 | Self-adaptive air release rod and shallow layer air controlled air release recovery system and method |
| CN211402790U (en) * | 2019-12-31 | 2020-09-01 | 江苏南京地质工程勘察院 | Shallow harmful gas detection equipment |
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