A gas probe device and a shallow underground gas exploration device

Abstract

The present application relates to a gas probe device and a shallow underground gas exploration device. The gas probe device includes: a second hollow probe rod, one end of which is connected with a conical head; a first hollow probe rod, one end of which faces the second hollow probe rod; an insertion pipe group, which includes a piston pipe and a breathable, water-permeable and mud-blocking pipe. Through holes are provided on the pipe wall of the piston pipe. One end of the piston pipe is connected to the first hollow probe rod, and the other end is movably inserted into the second hollow probe rod. One end of the breathable, water-permeable and mud-blocking pipe is connected to the first hollow probe rod, and the other end is movably inserted into the second hollow probe rod, and the piston pipe is located inside the breathable, water-permeable and mud-blocking pipe. In the gas probe device provided by the present application, by arranging the breathable, water-permeable and mud-blocking pipe outside the piston pipe, even if the piston pipe is exposed outside the second hollow probe rod, the breathable, water-permeable and mud-blocking function can effectively isolate sand and soil, avoid sand and soil from entering the hollow probe rod, and ensure the purity of gas collection.

Description

Technical Field

[0001] The present application relates to the technical field of underground shallow gas detection, and in particular to a gas probe device and underground shallow gas exploration equipment. Background Art

[0002] Shallow underground harmful gas refers to natural gas with methane as the main component produced by underground organic matter after a series of physical and biochemical effects. Under normal circumstances, shallow gas is buried at a shallow depth, generally within 1500m; in recent years, it has been found that shallow gas also exists in the ultra-shallow layer (10-100m). This shallow gas with flammable and explosive characteristics can easily induce engineering hazards and production safety accidents under the conditions of engineering unloading disturbance. Therefore, engineering accidents such as tunnels, pile foundations, foundation pits, and caissons that are affected by shallow gas have also frequently appeared in the public's field of vision. Furthermore, shallow gas, as a new type of geological disaster, has attracted more and more attention and attention. How to explore the distribution range, distribution amount and type of shallow underground harmful gases plays an important role in the assessment and prevention of engineering disasters.

[0003] At present, most of the research on shallow gas in China is centered around the energy industry, while there is a lack of standardized, global, and professional research on shallow gas in the field of engineering construction. According to the existing exploration experience and methods, underground gas detection is mainly based on some methods in the field of mining engineering. For example: gas-liquid separation method, orifice measurement method, gas sampling method, etc. The listed detection methods are relatively rough and cannot accurately measure the gas pressure and gas volume in situ. In addition, due to the presence of groundwater, it is very easy to cause sand to mix into the sampling probe, affecting the collection and purity of the gas. Summary of the invention

[0004] The embodiments of the present application provide a gas probe device and underground shallow gas exploration equipment to solve the problems in the related art that the shallow underground gas cannot be accurately measured and the purity of the gas sampling is low.

[0005] In a first aspect, a gas probe device is provided, the gas probe device comprising:

[0006] A second hollow probe rod, one end of which is connected to a cone head;

[0007] A first hollow probe rod, one end of which is opposite to the second hollow probe rod;

[0008] A plug-in tube group includes a piston tube and a breathable and water-permeable mud barrier tube, wherein a through hole is provided on the tube wall of the piston tube, 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.

[0009] In some embodiments, the wall of the second hollow probe rod is recessed along the axial direction of the second hollow probe rod from its top to form a receiving groove, and the breathable and water-permeable mud blocking pipe is inserted into the receiving groove.

[0010] In some embodiments, an anti-disengagement mechanism is formed between the insertion pipe group and the second hollow probe rod to prevent the insertion pipe group from disengaging from the second hollow probe rod.

[0011] In some embodiments, the anti-disengagement mechanism includes:

[0012] A second resisting portion protruding from the inner wall of the second hollow probe rod;

[0013] A first resisting portion protruding from the outer wall of the piston pipe and located inside the second hollow probe rod;

[0014] Moreover, a projected part of the first resisting portion and the second resisting portion coincides on a plane perpendicular to the axial direction of the second hollow probe rod.

[0015] In a second aspect, the present application provides an underground shallow gas exploration device, which includes:

[0016] The gas probe device as described above; and,

[0017] A driving device, the driving device is connected to the first hollow probe rod;

[0018] A detection device, the detection device is communicated with the inner cavity of the piston pipe, and a channel for gas to pass through is formed in the detection device;

[0019] A gas sampling device, the gas sampling device is communicated with the channel of the detection device.

[0020] In some embodiments, the detection device includes a sealing piston, a pressure detector and a flow detector connected in sequence;

[0021] The sealing piston is slidably and sealingly connected to the inner wall of the first hollow probe rod.

[0022] In some embodiments, a first valve is provided between the pressure detector and the sealing piston;

[0023] A second valve is provided between the pressure detector and the flow detector.

[0024] In some embodiments, the gas sampling device includes:

[0025] An intake pipe, a box body, a vacuum machine, a gas collecting dish and an igniter, the box body is communicated with the channel of the detection device through the intake pipe;

[0026] The vacuum machine, the gas collecting dish, and the igniter are respectively communicated with the box body.

[0027] In some embodiments, the driving device includes:

[0028] A hydraulic platform, a hydraulic device and a reaction block arranged on the hydraulic platform, and the hydraulic device is connected to the first hollow probe.

[0029] In some embodiments, a slide rail is provided on the hydraulic platform, the reaction block is arranged on the slide rail, and the reaction block is slidably connected to the hydraulic platform.

[0030] The beneficial effects brought by the technical solution provided by this application include:

[0031] For the gas probe device provided by this application, by arranging a breathable, water-permeable and mud-blocking pipe outside the piston pipe, even if the piston pipe is exposed outside the second hollow probe, the breathable, water-permeable and mud-blocking function can effectively isolate sand and soil, prevent sand and soil from entering the hollow probe, and ensure the purity of gas collection;

[0032] For the underground shallow gas exploration equipment provided by this application, during the process of the driving device inserting the gas probe device into the formation, the lower end of the first hollow probe closely adheres to the top end of the second hollow probe under the driving force, so that the piston pipe is sealed in the second hollow probe and the water-permeable mud-blocking pipe, effectively isolating sand and soil, preventing sand and soil from entering the hollow probe, and ensuring the purity of gas collection. When the appropriate depth is reached, the first hollow probe is pulled upward to expose the piston pipe outside the second hollow probe, so that the piston pipe is exposed in the gas layer. Under the action of the pressure difference, gas and groundwater will enter the first hollow probe through the channel, enabling the detection device to measure the flow rate, air pressure and water pressure of the gas. Throughout the process, the water-permeable mud-blocking pipe always surrounds the outside of the piston pipe, effectively blocking sand and soil from entering the internal part of the exploration equipment, improving the purity of gas sampling, and having the advantages of accurately detecting shallow gas, conveniently obtaining gas samples, and safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the underground shallow gas exploration equipment provided by the embodiment of the present application;

[0035] Figure 2 It is a sectional view of the gas probe device provided by the embodiment of the present application;

[0036] Figure 3 The top view of the hydraulic device provided by the embodiment of the present application.

[0037] In the figure: 1. Gas probe device; 11. First hollow probe; 12. Second hollow probe; 121. Receiving groove; 122. Second blocking part; 13. Cone head; 14. Piston tube; 141. Through hole; 142. First blocking part; 15. Air and water permeable mud guard tube; 16. Threaded connector; 17. Rubber pad; 2. Driving device; 21. Hydraulic platform; 211. Slide rail; 22. Hydraulic device; 23. Reaction block; 24. Reaction drill bit; 25. Calibrator; 26. Fixer; 3. Detection device; 31. Sealing piston; 311. Rubber ring; 32. Pressure detector; 33. Flow detector; 4. Gas sampling device; 41. Intake pipe; 42. Box body; 43. Vacuum machine; 44. Gas collecting dish; 45. Igniter; 46. Third valve; 47. Fourth valve; 5. Control processing system. Specific embodiments

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0039] As Figure 1-2 shown, in a first aspect, the embodiment of the present application provides a gas probe device, and the gas probe device 1 includes:

[0040] A second hollow probe 12, one end of which is connected with a cone head 13;

[0041] A first hollow probe 11, one end of which is opposite to the second hollow probe 12;

[0042] An insertion pipe group, which includes a piston tube 14 and an air and water permeable mud guard tube 15. A through hole 141 is provided on the tube wall of the piston tube 14. One end of the piston tube 14 is connected to the first hollow probe 11, and the other end is movably inserted into the second hollow probe 12. One end of the air and water permeable mud guard tube 15 is connected to the first hollow probe 11, and the other end is movably inserted into the second hollow probe 12, and the piston tube 14 is located inside the air and water permeable mud guard tube 15.

[0043] The gas probe device 1 of the present application, during the process of inserting into the soil layer, the cone head 13 is used to push away the soil to guide the first hollow probe rod 11 and the second hollow probe rod 12 to be inserted into the soil layer. Driven by the 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 reaching the appropriate depth, the first hollow probe rod 11 is moved upward. During this process, the plug-in tube group fixedly connected to the first hollow probe rod 11 moves upward at the same time as the first hollow probe rod 11, and the cone head 1 3 and the second hollow probe rod 12 remain motionless under the pressure of the outer soil layer and its own gravity, so that the piston tube 14 gradually emerges from the second hollow probe rod 12. Under the action of the pressure difference, the shallow underground gas and water can enter the piston tube 14 through the air-permeable and water-permeable mud-blocking tube 15 and the through hole 141 in turn, thereby realizing the subsequent measurement of gas flow, pressure and water pressure. During the entire measurement process, the air-permeable and water-permeable mud-blocking tube 15 is always arranged outside the piston tube 14, which effectively blocks sand and soil from entering the interior of the detection equipment, thereby improving the purity of gas sampling and the detection rate.

[0044] In a preferred embodiment, the first hollow probe rod 11 is connected to the piston tube 14 via a threaded connector 16, and the second hollow probe rod 12 is threadedly connected to the cone head, which facilitates the assembly of the gas probe device 1. When a component is damaged, a new component can be directly disassembled and installed, which has the advantage of ease of use.

[0045] Furthermore, a rubber pad 17 is provided at the bottom of the threaded connector 16 , which is helpful to relieve the stress between the threaded connector 16 and the second hollow probe rod 12 and reduce wear.

[0046] In a preferred embodiment, the cone head 13 includes a cylindrical portion and a cone portion connected to the lower end of the cylindrical portion. The diameter of the cylindrical portion is greater than the diameter of the second hollow probe rod 12, which is beneficial to reducing the side friction resistance caused by lifting the probe rod.

[0047] like Figure 2 As shown, in some embodiments, the wall of the second hollow probe rod 12 is recessed from the top along the axial direction of the second hollow probe rod 12 to form a receiving groove 121 , and the air-permeable and water-permeable mud guard tube 15 is inserted into the receiving groove 121 .

[0048] By providing a receiving groove 121 on the wall of the second hollow probe rod 12 that can accommodate the breathable and water-permeable mud guard tube 15, on the one hand, during the process of inserting the gas probe device 1 into the soil layer, the wall of the second hollow probe rod 12 can protect the breathable and water-permeable mud guard tube 15, preventing mud from adhering to the surface of the breathable and water-permeable mud guard tube 15, reducing subsequent cleaning procedures, and ensuring that gas and groundwater can smoothly pass through the breathable and water-permeable mud guard tube 15 and enter the piston tube 14. On the other hand, the receiving groove can stabilize the breathable and water-permeable mud guard tube 15, preventing it from shaking during the insertion and upward movement.

[0049] Specifically, as Figure 2 shown, the wall of the second hollow probe rod 12 includes a first pipe wall and a second pipe wall spaced outside the first pipe wall, and the receiving groove 121 is formed between the first pipe wall and the second pipe wall. The breathable and water-permeable mud guard tube 15 is movably inserted into the receiving groove 121 and can move up and down relative to the wall of the second hollow probe rod 12.

[0050] In some embodiments, an anti-disengagement mechanism is formed between the insertion pipe group and the second hollow probe rod 12 to prevent the insertion pipe group from disengaging from the second hollow probe rod 12.

[0051] By providing an anti-disengagement mechanism between the insertion pipe group and the second hollow probe rod 12, it can be avoided that the insertion pipe group disengages from the inner cavity of the second hollow probe rod 12 during the upward movement, ensuring the reliability of the gas probe device and improving work efficiency.

[0052] In some embodiments, the anti-disengagement mechanism includes:

[0053] A second resisting portion 122 protruding from the inner wall of the second hollow probe rod 12;

[0054] A first resisting portion 142 protruding from the outer wall of the piston tube 14 and located inside the second hollow probe rod 12;

[0055] And, the projection of the first resisting portion 142 and the second resisting portion 122 on a plane perpendicular to the axis of the second hollow probe rod 12 partially overlaps.

[0056] Specifically, during the process of inserting the gas probe device 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 out of the second hollow probe rod 12 by a sufficient height, improving the gas sampling efficiency.

[0057] 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, enabling the piston tube 14 to be clamped with the second hollow probe rod 12 and preventing the two from separating from each other.

[0058] The specific structures of the second blocking part 122 and the first blocking part 142 are not particularly limited, as long as they can prevent the piston tube 14 from disengaging from the inner cavity of the second hollow probe 12. For example, Figure 2 as shown, the second blocking part 122 can be set as a limiting ring located at the top end of the inner wall of the second hollow probe 12, and the first blocking part 142 can be set as a limiting protrusion located at the bottom end of the piston tube 14. This setting enables the tube body of the piston tube 14 to be maximally exposed outside the second hollow probe 12 and fully exposed to the gas layer, improving the gas sampling efficiency.

[0059] Secondly, the present application also provides an underground shallow layer gas exploration device, which includes:

[0060] The gas probe device 1 as described above; and,

[0061] A driving device 2, the driving device 2 is connected to the first hollow probe 11;

[0062] A detection device 3, the detection device 3 is communicated with the inner cavity of the piston tube 14, and a channel for gas passage is formed in the detection device 3;

[0063] A gas sampling device 4, the gas sampling device 4 is communicated with the channel of the detection device 3.

[0064] Specifically, the driving device 2 can provide a driving force for the first hollow probe 11 to move upward or downward;

[0065] The detection device 3 can be used to detect gas flow rate, air pressure and groundwater hydraulic pressure;

[0066] The gas sampling device 4 can be used to collect underground shallow layer gas, facilitating subsequent analysis of the gas composition.

[0067] In some embodiments, the detection device 3 includes a sealing piston 31, a pressure detector 32 and a flow detector 33 connected in sequence;

[0068] The sealing piston 31 is slidably and sealingly connected to the inner wall of the first hollow probe 11.

[0069] Specifically, channels are formed inside the piston tube 14, the sealing piston 31, the pressure detector 32 and the flow detector 33, and gas can sequentially pass through the piston tube 14, the sealing piston 31, the pressure detector 32 and the flow detector 33 through these channels;

[0070] To improve the sealing performance between the sealing piston 31 and the inner wall of the first hollow probe 11, it is preferably to embed a rubber ring 311 on the outer wall of the sealing piston 31. The elastic rubber ring is mutually extruded with the inner wall of the first hollow probe 11 to reduce the gap and improve the sealing performance.

[0071] In some embodiments, a first valve is provided between the pressure detector 32 and the sealing piston 31;

[0072] A second valve is provided between the pressure detector 32 and the flow detector 33.

[0073] Specifically, the first valve can be used to close the channel between the pressure detector 32 and the sealing piston 31, and the second valve can be used to close the channel between the pressure detector 32 and the flow detector 33.

[0074] In a preferred embodiment, a liquid sensor is installed on the first valve, which can control the opening and closing of the first valve.

[0075] In some embodiments, the gas sampling device 4 includes:

[0076] An intake pipe 41, a box body 42, a vacuum machine 43, a gas collecting dish 44 and an igniter 45. The channel of the box body 42 and the detection device 3 is communicated through the intake pipe 41;

[0077] The vacuum machine 43, the gas collecting dish 44 and the igniter 45 are respectively communicated with the box body 42.

[0078] In a preferred embodiment, the box body 42 is selected as a vacuum compression cylinder, and the igniter 45 is used for burning and treating excess harmful gases.

[0079] In a preferred embodiment, a third valve 46 is provided on the intake pipe 41, and a fourth valve 47 is provided between the box body 42 and the igniter.

[0080] In some embodiments, the driving device 2 includes:

[0081] A hydraulic platform 21, a hydraulic device 22 and a reaction block 23 arranged on the hydraulic platform 21. The hydraulic device 22 is connected to the first hollow probe 11.

[0082] Specifically, the hydraulic device 22 can be selected as a hydraulic cylinder. The hydraulic device 22 is fixedly connected to the hydraulic platform 21 and provides driving forces for the up and down movement of the first hollow probe 11. The reaction block 23 is connected to the hydraulic platform 21 and is located on the outer periphery of the hydraulic device 22. The reaction block 23 can provide a reaction force for the hydraulic platform 21 by its own weight during the process of the gas probe device 1 being inserted into the soil layer, improving the stability of the driving device 2.

[0083] In a preferred embodiment, a reaction bit 24 is provided at the bottom of the hydraulic platform 21. The bottom of the reaction bit 24 is of an inverted cone structure, which reduces the contact area between the driving device 2 and the ground and increases the pressure. The reaction bit 24 can cooperate with the reaction block 23 to provide a reaction force for the hydraulic platform 21, further improving the stability of the equipment.

[0084] As Figure 3 shown, in some embodiments, a slide rail 211 is provided on the hydraulic platform 21. The reaction block 23 is arranged on the slide rail 211, and the reaction block 23 is slidably connected to the hydraulic platform 21.

[0085] The reaction block 23 is slidably connected to the hydraulic platform 21 through the slide rail 211. The horizontal position of the entire driving device 2 can be adjusted by adjusting the position of the reaction block 23, thereby improving the stability of the driving device 2.

[0086] In a preferred embodiment, a calibrator 25 is further provided on the hydraulic platform 21. The calibrator 25 can be used to display the horizontal state of the hydraulic platform 21, facilitating the adjustment of the reaction block 23.

[0087] In a preferred embodiment, a fixator 26 is further provided on the hydraulic platform 21. The fixator 26 can be used to fix the reaction block 23 to prevent it from moving.

[0088] In a preferred embodiment, the underground shallow gas exploration equipment further includes a control and processing system 5. The control and processing system 5 can control the opening and closing of the first valve and the second valve.

[0089] The test process of using the underground shallow gas exploration equipment of the present application is briefly described below:

[0090] 101: Before the gas probe device 1 penetrates into the soil layer, all valves (the first valve, the second valve, the third valve 46, and the fourth valve 47) are opened to make the box body 42 in a sealed state;

[0091] 102: After the site is leveled, the driving device 2 is placed, and the position of the reaction block 23 is adjusted according to the information displayed by the calibrator 25 so that the hydraulic platform 21 is in a horizontal state;

[0092] 103: Start the hydraulic device 22 and insert the gas probe device 1 into the specified depth of the soil layer;

[0093] 104: After reaching the specified depth h1, close the fourth valve 47, start the vacuum machine 43 to evacuate the entire system, and when the pressure vacuum gauge is close to 0 MPa, turn off the vacuum machine 43;

[0094] 105: Close the second valve, and then lift the first hollow probe rod 11 together with the piston tube 14 and the air and water permeable mud guard tube 15 through the hydraulic device 22. Under the action of the pressure difference, the shallow gas and groundwater enter the inner cavity through the through holes 141 of the air and water permeable mud guard tube 15 and the piston tube 14. At this time, the pressure detector 32 can detect the sum of the air pressure and water pressure in the inner cavity;

[0095] 106: After the pressure measurement is completed, open the second valve to allow the gas to pass through the flow detector 33 to detect the gas flow rate;

[0096] 107: Use the gas collecting dish 44 to collect the gas. After the collection is completed, start the igniter 45 to burn and process the remaining gas, and close the second valve when the air pressure inside and outside the probe rod tends to balance;

[0097] 108: Record the depth h2 of the second valve, and calculate the water pressure according to the difference between h2 and h1.

[0098] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0099] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0100] The above description is only a specific implementation manner of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A gas probe device, characterized in that, The gas probe device (1) includes: A second hollow probe rod (12) with a conical head (13) connected to one end; A first hollow probe rod (11) with one end opposite to the second hollow probe rod (12); An insertion pipe group, which includes a piston pipe (14) and a breathable, water-permeable and mud-blocking pipe (15). Through holes (141) are provided on the pipe wall of the piston pipe (14). One end of the piston pipe (14) is connected to the first hollow probe rod (11), and the other end is movably inserted into the second hollow probe rod (12). One end of the breathable, water-permeable and mud-blocking pipe (15) is connected to the first hollow probe rod (11), and the other end is movably inserted into the second hollow probe rod (12), and the piston pipe (14) is located inside the breathable, water-permeable and mud-blocking pipe (15); The wall of the second hollow probe rod (12) is recessed along the axial direction of the second hollow probe rod (12) from its top to form a receiving groove (121), and the breathable, water-permeable and mud-blocking pipe (15) is inserted into the receiving groove (121).

2. The gas probe device according to claim 1, characterized in that, An anti-disengagement mechanism is formed between the insertion pipe group and the second hollow probe rod (12) to prevent the insertion pipe group from disengaging from the second hollow probe rod (12).

3. The gas probe device according to claim 2, wherein The anti-disengagement mechanism includes: A second resisting part (122) protruding from the inner wall of the second hollow probe rod (12); A first resisting part (142) protruding from the outer wall of the piston pipe (14) and located inside the second hollow probe rod (12); Moreover, the projected parts of the first resisting part (142) and the second resisting part (122) coincide in a plane perpendicular to the axial direction of the second hollow probe rod (12).

4. An underground shallow gas exploration device, characterized in that, It includes: The gas probe device (1) according to any one of claims 1-3; And, A driving device (2) connected to the first hollow probe rod (11); A detection device (3) communicated with the inner cavity of the piston pipe (14), and a channel for gas passage is formed in the detection device (3); A gas sampling device (4) communicated with the channel of the detection device (3).

5. The underground shallow gas exploration equipment according to claim 4, characterized in that, The detection device (3) includes a sealing piston (31), a pressure detector (32) and a flow detector (33) connected in sequence; The sealing piston (31) is slidably and sealingly connected to the inner wall of the first hollow probe rod (11).

6. The underground shallow gas exploration equipment according to claim 5, characterized in that, A first valve is provided between the pressure detector (32) and the sealing piston (31); A second valve is provided between the pressure detector (32) and the flow detector (33).

7. The underground shallow gas exploration equipment according to claim 4, characterized in that, The gas sampling device (4) includes: An intake pipe (41), a box body (42), a vacuum machine (43), a gas collecting dish (44) and an igniter (45). The box body (42) is communicated with the channel of the detection device (3) through the intake pipe (41); The vacuum machine (43), the gas collecting dish (44) and the igniter (45) are respectively communicated with the box body (42).

8. The underground shallow gas exploration equipment according to claim 4, characterized in that, The driving device (2) includes: A hydraulic platform (21), a hydraulic device (22) and a reaction block (23) arranged on the hydraulic platform (21), and the hydraulic device (22) is connected to the first hollow probe rod (11).

9. The underground shallow gas exploration equipment according to claim 8, wherein, A slide rail (211) is provided on the hydraulic platform (21), the reaction block (23) is arranged on the slide rail (211), and the reaction block (23) is slidably connected to the hydraulic platform (21).

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