CN115389279B - Gas probe device and underground shallow gas exploration equipment - Google Patents
Gas probe device and underground shallow gas exploration equipmentInfo
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- CN115389279B CN115389279B CN202211130465.XA CN202211130465A CN115389279B CN 115389279 B CN115389279 B CN 115389279B CN 202211130465 A CN202211130465 A CN 202211130465A CN 115389279 B CN115389279 B CN 115389279B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
本申请涉及一种气体探头装置及地下浅层气体勘探设备。该气体探头装置包括：第二空心探杆，其一端连接有锥头；第一空心探杆，其一端与第二空心探杆相对；插接管组，其包括活塞管和透气透水挡泥管，所述活塞管的管壁上设有通孔，所述活塞管一端连接于第一空心探杆上，另一端活动地插接于第二空心探杆，所述透气透水挡泥管一端连接于第一空心探杆上，另一端活动地插接于第二空心探杆，且所述活塞管位于所述透气透水挡泥管内。本申请提供的气体探头装置，通过在活塞管外设置透气透水挡泥管，即使活塞管裸露在第二空心探杆外，透气透水挡泥也能有效隔绝沙土，避免沙土进入空心探杆内，保证了气体的采集纯净度。
The present application relates to a gas probe device and underground shallow gas exploration equipment. The gas probe device includes: a second hollow probe rod, one end of which is connected to a cone head; a first hollow probe rod, one end of which is opposite to the second hollow probe rod; a plug-in tube group, which includes a piston tube and a breathable and water-permeable mud barrier tube, the tube wall of the piston tube is provided with a through hole, one end of the piston tube is connected to the first hollow probe rod, and the other end is movably plugged into the second hollow probe rod, one end of the breathable and water-permeable mud barrier tube is connected to the first hollow probe rod, and the other end is movably plugged into the second hollow probe rod, and the piston tube is located in the breathable and water-permeable mud barrier tube. The gas probe device provided by the present application, by arranging a breathable and water-permeable mud barrier tube outside the piston tube, even if the piston tube is exposed outside the second hollow probe rod, the breathable and water-permeable mud barrier can effectively isolate sand and soil, prevent sand and soil from entering the hollow probe rod, and ensure the purity of gas collection.
Description
Technical Field
The application relates to the technical field of underground shallow gas detection, in particular to a gas probe device and underground shallow gas exploration equipment.
Background
The underground shallow harmful gas refers to natural gas which is produced by underground organic matters under a series of physical and biochemical actions and takes methane as a main component. In general, shallow gas is buried in a shallow depth of 1500m or less, and in recent years, shallow gas is found to be present in an ultra-shallow (10 to 100 m) range. The shallow gas with inflammable and explosive characteristics is extremely easy to induce engineering harm and production safety accidents under the condition of engineering unloading disturbance. Therefore, engineering accidents such as instability of tunnels, pile foundations, foundation pits and open caissons, which are affected by shallow gas, frequently occur in the field of view of the public. Furthermore, shallow gas is attracting attention and importance as a new geological disaster, and how to ascertain the distribution range, distribution amount and type of underground shallow harmful gas plays an important role in evaluating and preventing engineering disasters.
At present, the domestic research of shallow gas is mostly carried out around the energy industry, but the shallow gas in the engineering construction field is lack of standardization, global and professional research. Underground gas detection is mainly some method in the field of mining engineering according to the existing investigation experience and method. For example, gas-liquid separation, orifice measurement, gas sampling, etc. The enumerated detection method is rough, accurate measurement of air pressure and air quantity cannot be carried out in situ, and moreover, sand is very easy to mix into a sampling probe due to the existence of underground water, so that the collection and purity of air are affected.
Disclosure of Invention
The embodiment of the application provides a gas probe device and underground shallow gas exploration equipment, which are used for solving the problems that the underground shallow gas cannot be accurately measured and the purity of gas sampling is low in the related technology.
In a first aspect, there is provided a gas probe apparatus comprising:
one end of the second hollow probe rod is connected with a cone head;
one end of the first hollow probe rod is opposite to the second hollow probe rod;
the plug-in pipe group comprises a piston pipe and a breathable and permeable mud blocking pipe, a through hole is formed in the pipe wall of the piston pipe, one end of the piston pipe is connected to the first hollow probe rod, the other end of the piston pipe is movably plugged into the second hollow probe rod, one end of the breathable and permeable mud blocking pipe is connected to the first hollow probe rod, the other end of the breathable and permeable mud blocking pipe is movably plugged into the second hollow probe rod, and the piston pipe is located in the breathable and permeable mud blocking pipe.
In some embodiments, the wall body of the second hollow probe rod is recessed from the top of the wall body along the axial direction of the second hollow probe rod and is formed with a containing groove, and the air-permeable and water-permeable mud blocking pipe is inserted into the containing groove.
In some embodiments, an anti-drop mechanism for preventing the plugging tube group from being separated from the second hollow probe rod is formed between the plugging tube group and the second hollow probe rod.
In some embodiments, the anti-disengaging mechanism comprises:
the second resisting part is formed by protruding the inner wall of the second hollow probe rod;
The first resisting part is formed by protruding the outer wall of the piston tube and is positioned in the second hollow probe rod;
And the projection parts of the first resisting part and the second resisting part on a plane perpendicular to the axial direction of the second hollow probe rod are overlapped.
In a second aspect, the present application provides a subsurface shallow gas exploration apparatus, comprising:
gas probe apparatus as described above, and
The driving device is connected with the first hollow probe rod;
the detection device is communicated with the inner cavity of the piston tube, and a channel for gas to pass through is formed in the detection device;
and the gas sampling device is communicated with the channel of the detection device.
In some embodiments, the detection device comprises a sealing piston, a pressure detector and a flow detector connected in sequence;
The sealing piston is in sliding sealing connection with the inner wall of the first hollow probe rod.
In some embodiments, a first valve is disposed between the pressure detector and the sealing piston;
And a second valve is arranged between the pressure detector and the flow detector.
In some embodiments, the gas sampling apparatus comprises:
the device comprises an air inlet pipe, a box body, a vacuum machine, a gas collecting vessel and an igniter, wherein the box body is communicated with a channel of the detection device through the air inlet pipe;
the vacuum machine, the gas collecting vessel and the igniter are respectively communicated with the box body.
In some embodiments, the driving device includes:
The hydraulic platform, the hydraulic device and the counterforce block are arranged on the hydraulic platform, the hydraulic device is connected with the first hollow probe rod.
In some embodiments, the hydraulic platform is provided with a sliding rail, and the reaction block is arranged on the sliding rail and is in sliding connection with the hydraulic platform.
The technical scheme provided by the application has the beneficial effects that:
according to the gas probe device provided by the application, the breathable and permeable mud blocking pipe is arranged outside the piston pipe, so that even if the piston pipe is exposed outside the second hollow probe rod, the breathable and permeable mud blocking pipe can effectively isolate sand, so that the sand is prevented from entering the hollow probe rod, and the collection purity of gas is ensured;
According to the underground shallow gas exploration equipment provided by the application, in the process that the gas probe device is used into a stratum by the driving device, the lower end of the first hollow probe rod is tightly attached to the top end of the second hollow probe rod under the driving force, so that the piston tube is sealed in the second hollow probe rod and the permeable mud baffle tube, sandy soil is effectively isolated, the sandy soil is prevented from entering the hollow probe rod, the collection purity of gas is ensured, after the proper depth is reached, the first hollow probe rod is pulled upwards, the piston tube is exposed out of the second hollow probe rod, so that the piston tube is exposed in a gas layer, gas and underground water can enter the first hollow probe rod from a channel under the action of pressure difference, the detection device can measure the flow, the pressure and the water pressure of the gas, and the permeable mud baffle tube is always arranged outside the piston tube in the whole process, so that the sandy soil is effectively prevented from entering the detection equipment, the purity of gas sampling is improved, the shallow gas is accurately detected, the gas sample is conveniently obtained, and the safety operation is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a shallow gas exploration apparatus under the ground according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a gas probe apparatus according to an embodiment of the present application;
fig. 3 is a top view of a hydraulic device according to an embodiment of the present application.
The device comprises a gas probe device 1, a first hollow probe rod, a second hollow probe rod 12, 121, a containing groove 122, a second resisting part, a conical head 13, a piston tube 14, a 141, a through hole 142, a first resisting part, a 15, a breathable and water-permeable mud-blocking tube 16, a threaded connector 17, a rubber pad 2, a driving device 21, a hydraulic platform 211, a sliding rail 22, a hydraulic device 23, a counterforce block 24, a counterforce drill bit 25, a calibrator 26, a fixer 3, a detection device 31, a sealing piston 311, a rubber ring 32, a pressure detector 33, a flow detector 4, a gas sampling device 41, a gas inlet pipe 42, a box body 43, a vacuum machine 44, a gas collecting vessel 45, an igniter 46, a third valve 47, a fourth valve 5 and a control processing system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1-2, in a first aspect, an embodiment of the present application provides a gas probe apparatus 1, including:
a second hollow probe rod 12, one end of which is connected with a conical head 13;
a first hollow probe 11, one end of which is opposite to the second hollow probe 12;
The plug-in pipe group comprises a piston pipe 14 and a breathable and permeable mud baffle pipe 15, a through hole 141 is formed in the pipe wall of the piston pipe 14, one end of the piston pipe 14 is connected to the first hollow probe rod 11, the other end of the piston pipe is movably plugged into the second hollow probe rod 12, one end of the breathable and permeable mud baffle pipe 15 is connected to the first hollow probe rod 11, the other end of the breathable and permeable mud baffle pipe 15 is movably plugged into the second hollow probe rod 12, and the piston pipe 14 is positioned in the breathable and permeable mud baffle pipe 15.
According to the gas probe device 1 disclosed by the application, in the process of inserting the gas probe device into a soil layer, the cone head 13 is used for pulling out soil to guide the first hollow probe rod 11 and the second hollow probe rod 12 to be inserted into the soil layer, under the driving of a pressing force, the bottom of the first hollow probe rod 11 is tightly attached to the top of the second hollow probe rod 12, so that the piston tube 14 is sealed in the second hollow probe rod 12, after a proper depth is reached, the first hollow probe rod 11 is moved upwards, in the process, the plug tube group fixedly connected with the first hollow probe rod 11 moves upwards along with the first hollow probe rod 11 at the same time, the cone head 13 and the second hollow probe rod 12 are kept motionless under the pressure of a peripheral soil layer and the self gravity, the piston tube 14 gradually exposes out of the second hollow probe rod 12, and under the action of a pressure difference, underground shallow layer gas and water can sequentially enter the piston tube 14 through the ventilation mud blocking tube 15 and the through holes 141, so that the subsequent measurement of gas flow, the pressure and water pressure are realized, and in the whole measurement process, the ventilation mud blocking tube 15 is always arranged outside the piston tube 14, the sand blocking tube is effectively blocked, the inside the detection device is effectively blocked, the gas entering the inside the detection device is effectively, and the purity rate is improved, and the sampling rate is improved.
In the preferred embodiment, the first hollow probe 11 is connected with the piston tube 14 through the threaded connector 16, and the second hollow probe 12 is connected with the conical head through threads, so that the assembly of the gas probe device 1 is facilitated, and when a certain component is damaged, a new component can be directly detached and installed, so that the gas probe device has the advantage of convenience in use.
Further, a rubber pad 17 is further arranged at the bottom of the threaded connector 16, so that stress between the threaded connector 16 and the second hollow probe 12 is relieved, and abrasion is reduced.
In a preferred embodiment, the conical head 13 includes a cylindrical portion and a conical portion connected to a lower end portion of the cylindrical portion, and the diameter of the cylindrical portion is larger than that of the second hollow probe 12, so as to reduce side friction resistance caused when the probe is lifted.
As shown in fig. 2, in some embodiments, the wall of the second hollow probe 12 is recessed from the top along the axial direction of the second hollow probe 12 to form a receiving groove 121, and the air-permeable and water-permeable mud-guard 15 is inserted into the receiving groove 121.
Through setting up the accepting groove 121 that can hold ventilative permeable mud-guard pipe 15 at the wall body of second hollow probe 12, on the one hand, at the in-process that gas probe device 1 inserted the soil layer, the wall body of second hollow probe 12 can play the guard action to ventilative permeable mud-guard pipe 15, avoid earth to bond on ventilative permeable mud-guard pipe 15 surface, less follow-up cleaning procedure, guarantee simultaneously that gas and groundwater can pass through ventilative permeable mud-guard pipe 15 smoothly and get into in the piston tube 14, on the other hand, the accepting groove can play the stabilization effect to ventilative permeable mud-guard pipe 15, avoid ventilative permeable mud-guard pipe 15 to produce in inserting and the upward shift in-process and rock.
Specifically, as shown in fig. 2, the wall body of the second hollow probe rod 12 includes a first pipe wall and a second pipe wall disposed at an outer portion of the first pipe wall at intervals, the accommodating groove 121 is formed between the first pipe wall and the second pipe wall, and the air-permeable and water-permeable mud-blocking pipe 15 is movably inserted into the accommodating groove 121 and can move up and down relative to the wall body of the second hollow probe rod 12.
In some embodiments, an anti-disengagement mechanism is formed between the set of grafting tubes and the second hollow probe 12 to prevent disengagement of the set of grafting tubes from the second hollow probe 12.
By arranging the anti-falling mechanism between the plug tube group and the second hollow probe rod 12, the plug tube group can be prevented from falling out of the inner cavity of the second hollow probe rod 12 in the upward moving process, the reliability of the gas probe device is ensured, and the working efficiency is improved.
In some embodiments, the anti-disengaging mechanism comprises:
a second resisting part 122, which is formed by protruding the inner wall of the second hollow probe 12;
A first resisting part 142, which is formed by protruding the outer wall of the piston tube 14 and is located in the second hollow probe 12;
And, the projected portions of the first abutment 142 and the second abutment 122 on a plane perpendicular to the axial direction of the second hollow probe 12 coincide.
Specifically, during the process of inserting the gas probe apparatus 1 into the soil layer, the distance between the second resisting portion 122 and the first resisting portion 142 is preferably greater than 1/2 of the length of the piston tube 14, so that the piston tube 14 can extend to a sufficient height from the second hollow probe 12, thereby improving the gas sampling efficiency.
During the upward movement of the piston tube 14, the upper end surface of the first resisting portion 142 abuts against the lower end surface of the second resisting portion 122, so that the piston tube 14 can be clamped with the second hollow probe 12, and the piston tube and the second hollow probe are prevented from being separated from each other.
The specific structures of the second resisting portion 122 and the first resisting portion 142 are not particularly limited, as long as the piston tube 14 can be prevented from being separated from the inner cavity of the second hollow probe 12, as shown in fig. 2, the second resisting portion 122 may be configured as a limiting ring located at the top end of the inner wall of the second hollow probe 12, and the first resisting portion 142 may be configured as a limiting protrusion located at the bottom end of the piston tube 14, so that the tube body of the piston tube 14 can be furthest exposed outside the second hollow probe 12 and fully exposed in the gas layer, thereby improving the gas sampling efficiency.
In a second aspect, the present application also provides a subsurface shallow gas exploration apparatus, comprising:
the gas probe apparatus 1 as described above, and
The driving device 2 is connected with the first hollow probe rod 11;
a detection device 3, wherein the detection device 3 is communicated with the inner cavity of the piston tube 14, and a channel for gas to pass through is formed in the detection device 3;
And a gas sampling device 4, wherein the gas sampling device 4 is communicated with the channel of the detection device 3.
In particular, the driving device 2 may provide a driving force for the first hollow probe 11 to move upwards or downwards;
the detection device 3 can be used for detecting the gas flow, the gas pressure and the groundwater pressure;
the gas sampling apparatus 4 may be used to collect the subsurface gas for subsequent analysis of the gas composition.
In some embodiments, the detection device 3 comprises a sealing piston 31, a pressure detector 32 and a flow detector 33 connected in sequence;
The sealing piston 31 is in sliding sealing connection with the inner wall of the first hollow probe 11.
Specifically, a passage is formed inside the piston tube 14, the sealing piston 31, the pressure detector 32, and the flow detector 33, through which gas can pass through the piston tube 14, the sealing piston 31, the pressure detector 32, and the flow detector 33 in this order;
In order to improve the tightness between the sealing piston 31 and the inner wall of the first hollow probe 11, it is preferable to embed a rubber ring 311 on the outer wall of the sealing piston 31, and the elastic rubber ring and the inner wall of the first hollow probe 11 are mutually pressed, so that the gap is reduced, and the tightness is improved.
In some embodiments, a first valve is provided between the pressure detector 32 and the sealing piston 31;
a second valve is arranged between the pressure detector 32 and the flow detector 33.
In particular, a first valve may be used to close the passage between the pressure detector 32 and the sealing piston 31, and a second valve may be used to close the passage between the pressure detector 32 and the flow detector 33.
In a preferred embodiment, the first valve is provided with a liquid sensor which controls the opening and closing of the first valve.
In some embodiments, the gas sampling apparatus 4 comprises:
the air inlet pipe 41, the box body 42, the vacuum machine 43, the air collecting dish 44 and the igniter 45, wherein the box body 42 is communicated with a channel of the detection device 3 through the air inlet pipe 41;
the vacuum 43, the gas collection vessel 44 and the igniter 45 are respectively communicated with the tank 42.
In the preferred embodiment, the housing 42 is a vacuum compression cylinder and the igniter 45 is used to burn off the excess harmful gases.
In the preferred embodiment, a third valve 46 is provided on the air inlet pipe 41, and a fourth valve 47 is provided between the tank 42 and the igniter.
In some embodiments, the driving device 2 includes:
the hydraulic device comprises a hydraulic platform 21, a hydraulic device 22 and a counterforce block 23, wherein the hydraulic device 22 and the counterforce block 23 are arranged on the hydraulic platform 21, and the hydraulic device 22 is connected with the first hollow probe rod 11.
Specifically, the hydraulic device 22 may be a hydraulic cylinder, the hydraulic device 22 is fixedly connected with the hydraulic platform 21 thereof, and provides a driving force for the first hollow probe rod 11 to move upwards and downwards, the reaction block 23 is connected with the hydraulic platform 21 and is located at the periphery of the hydraulic device 22, and the reaction block 23 can provide a reaction force for the hydraulic platform 21 by using its own weight in the process of inserting the gas probe device 1 into a soil layer, so as to improve the stability of the driving device 2.
In the preferred embodiment, the bottom of the hydraulic platform 21 is provided with the counterforce drill bit 24, the bottom of the counterforce drill bit 24 is in an inverted cone structure, the contact area between the driving device 2 and the ground is reduced, the pressure is increased, and the counterforce drill bit 24 and the counterforce block 23 can cooperate to provide counterforce for the hydraulic platform 21, so that the equipment stability is further improved.
As shown in fig. 3, in some embodiments, a sliding rail 211 is provided on the hydraulic platform 21, the reaction block 23 is provided on the sliding rail 211, and the reaction block 23 is slidably connected to the hydraulic platform 21.
The reaction block 23 is slidably connected with the hydraulic platform 21 through the slide rail 211, and the horizontal position of the whole driving device 2 can be adjusted by adjusting the position of the reaction block 23, so that the stability of the driving device 2 is improved.
In a preferred embodiment, the hydraulic platform 21 is further provided with a calibrator 25, and the calibrator 25 may be used to display the horizontal state of the hydraulic platform 21, so as to facilitate adjustment of the reaction block 23.
In a preferred embodiment, a holder 26 is also provided on the hydraulic platform 21, said holder 26 being adapted to hold the reaction mass 23 against movement.
In a preferred embodiment, the subsurface shallow gas exploration apparatus further comprises a control processing system 5, the control processing system 5 being operable to control the opening and closing of the first valve and the second valve.
The following briefly describes the experimental procedure for using the underground shallow gas exploration apparatus of the present application:
101, before the gas probe device 1 penetrates into a soil layer, all valves (a first valve, a second valve, a third valve 46 and a fourth valve 47) are opened, so that the box body 42 is in a sealed state;
102, placing the driving device 2 after the site is leveled, and adjusting the position of the counter-force block 23 according to the information displayed by the calibrator 25 so that the hydraulic platform 21 is in a horizontal state;
103, starting the hydraulic device 22, and inserting the gas probe device 1 into the soil layer to a specified depth;
104, after reaching the designated depth h 1, closing the fourth valve 47, starting the vacuum machine 43 to vacuumize the whole system, and closing the vacuum machine 43 when the pressure vacuum gauge approaches 0 MPa;
105, closing the second valve, lifting the first hollow probe 11 with the piston tube 14 and the ventilation and water-permeable mud-guard tube 15 by the hydraulic device 22, and allowing shallow gas and underground water to enter the inner cavity through the ventilation and water-permeable mud-guard tube 15 and the through hole 141 of the piston tube 14 under the action of pressure difference, wherein the pressure detector 32 can detect the sum of the air pressure and the water pressure of the inner cavity;
106, after the pressure measurement is completed, opening the second valve to enable the gas to pass through the flow detector 33 to detect the gas flow;
107, collecting gas by using a gas collecting vessel 44, starting an igniter 45 to burn the residual gas, and closing a second valve when the internal and external air pressures of the probe rod are balanced;
108, recording the depth h 2 of the second valve, and calculating the water pressure according to the difference value of h 2 and h 1.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intervening medium, or may be in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A gas probe apparatus, characterized in that the gas probe apparatus (1) comprises:
One end of the second hollow probe rod (12) is connected with a conical head (13);
A first hollow probe rod (11) having one end opposite to the second hollow probe rod (12);
The plug-in pipe group comprises a piston pipe (14) and a ventilation and water-permeable mud baffle pipe (15), a through hole (141) is formed in the pipe wall of the piston pipe (14), one end of the piston pipe (14) is connected to the first hollow probe rod (11), the other end of the piston pipe is movably plugged into the second hollow probe rod (12), one end of the ventilation and water-permeable mud baffle pipe (15) is connected to the first hollow probe rod (11), the other end of the ventilation and water-permeable mud baffle pipe is movably plugged into the second hollow probe rod (12), and the piston pipe (14) is positioned in the ventilation and water-permeable mud baffle pipe (15);
The wall body of the second hollow probe rod (12) is recessed from the top of the wall body along the axial direction of the second hollow probe rod (12) and is formed into a containing groove (121), and the air-permeable and water-permeable mud blocking pipe (15) is inserted into the containing groove (121).
2. A gas probe apparatus according to claim 1, wherein an anti-slip mechanism for preventing the insertion tube group from being detached from the second hollow probe (12) is formed between the insertion tube group and the second hollow probe (12).
3. The gas probe apparatus of claim 2, wherein the anti-disengaging mechanism comprises:
a second blocking part (122) which is formed by protruding the inner wall of the second hollow probe rod (12);
A first blocking part (142) which is formed by protruding the outer wall of the piston tube (14) and is positioned in the second hollow probe rod (12);
And, the projected portions of the first abutment (142) and the second abutment (122) on a plane perpendicular to the axial direction of the second hollow probe (12) coincide.
4. A subsurface shallow gas exploration apparatus, comprising:
A gas probe apparatus (1) according to any one of claims 1-3, and
The driving device (2) is connected with the first hollow probe rod (11);
The detection device (3) is communicated with the inner cavity of the piston tube (14), and a channel for gas to pass through is formed in the detection device (3);
and the gas sampling device (4), wherein the gas sampling device (4) is communicated with the channel of the detection device (3).
5. The underground shallow gas exploration apparatus according to claim 4, wherein the detection device (3) comprises a sealing piston (31), a pressure detector (32) and a flow detector (33) connected in sequence;
The sealing piston (31) is in sliding sealing connection with the inner wall of the first hollow probe rod (11).
6. The subsurface shallow gas exploration apparatus according to claim 5, wherein a first valve is provided between the pressure detector (32) and the sealing piston (31);
A second valve is arranged between the pressure detector (32) and the flow detector (33).
7. The subsurface shallow gas exploration apparatus as claimed in claim 4, wherein said gas sampling device (4) comprises:
The device comprises an air inlet pipe (41), a box body (42), a vacuum machine (43), a gas collecting vessel (44) and an igniter (45), wherein the box body (42) is communicated with a channel of the detection device (3) through the air inlet pipe (41);
The vacuum machine (43), the gas collecting vessel (44) and the igniter (45) are respectively communicated with the box body (42).
8. The subsurface shallow gas exploration apparatus as claimed in claim 4, wherein said drive means (2) comprises:
The hydraulic device comprises a hydraulic platform (21), a hydraulic device (22) and a counterforce block (23) which are arranged on the hydraulic platform (21), wherein the hydraulic device (22) is connected with the first hollow probe rod (11).
9. The underground shallow gas exploration apparatus according to claim 8, wherein a slide rail (211) is provided on the hydraulic platform (21), the reaction block (23) is provided on the slide rail (211), and the reaction block (23) is slidably connected with the hydraulic platform (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130465.XA CN115389279B (en) | 2022-09-16 | 2022-09-16 | Gas probe device and underground shallow gas exploration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130465.XA CN115389279B (en) | 2022-09-16 | 2022-09-16 | Gas probe device and underground shallow gas exploration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115389279A CN115389279A (en) | 2022-11-25 |
| CN115389279B true CN115389279B (en) | 2025-07-22 |
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| CN110700229A (en) * | 2019-11-01 | 2020-01-17 | 中国科学院武汉岩土力学研究所 | A portable shallow gas-bearing formation in-situ pressure measurement device and method |
| CN112253056A (en) * | 2020-09-10 | 2021-01-22 | 浙大城市学院 | Inner and outer pipe sliding type discharging device, equipment with controlled release of shallow harmful gas in water area and construction method |
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| CN109406223B (en) * | 2018-11-29 | 2023-10-20 | 中国科学院武汉岩土力学研究所 | In-situ gas sample acquisition probe and acquisition method for shallow gas-containing stratum |
| CN110644981B (en) * | 2019-09-17 | 2025-01-28 | 中国电建集团华东勘测设计研究院有限公司 | Telescopic deflation rod and shallow gas micro-disturbance in-situ controlled release system and method |
| CN212483063U (en) * | 2020-07-20 | 2021-02-05 | 浙江省水文地质工程地质大队 | Device for exploring and sampling seabed shallow gas |
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| CN112253056A (en) * | 2020-09-10 | 2021-01-22 | 浙大城市学院 | Inner and outer pipe sliding type discharging device, equipment with controlled release of shallow harmful gas in water area and construction method |
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