Soil gas layered collection device

Abstract

The utility model belongs to the technical field of soil gas collection, and provides a soil gas layered collection device which comprises a sampling pipe, a plurality of layers of annularly-distributed first gas inlets are formed in the pipe wall of the sampling pipe, a mounting block is arranged at the top of the sampling pipe, a movable and vertically-penetrating conveying gas pipe is arranged on the mounting block, and a plurality of second gas inlets are formed in the pipe wall of the sampling pipe. One end of the conveying air pipe extends into the sampling pipe, an air inlet disc is arranged at the bottom of the conveying air pipe, and second air inlets are distributed in the air inlet disc; the gas sampling device further comprises a lifting pipe, the lifting pipe is movably arranged on the gas conveying pipe in a sleeving mode, sealing assemblies are arranged on the bottom wall of the lifting pipe and the bottom of the gas inlet disc, and the sealing assemblies are movably attached to the inner wall of the sampling pipe. By arranging the adjusting device, soil gas at different depths can be collected in a layered manner, so that the collection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to soil gas collection technical field, concretely is a kind of soil gas layered collection device. BACKGROUND

[0002] Soil gas is the gas and volatile component in the earth interior continuously migrates and releases to the surface along the active block boundary and other active deep fracture zone of weak crust, mainly by CO2, CH4, H2, N2O, N2, Rn, Hg and other various gases. Active fault is the natural channel connecting deep and deep gas release, and the stronger the fault activity is, the higher the fault gas concentration is.

[0003] Various physical, chemical field changes occurring in the earth interior and the interaction between tectonic bodies will make deep underground gas along the active fault zone, intraplate block boundary, volcano and other weak crustal zones to escape upward. Fault soil gas refers to the underground gas escaping to the surface along the fracture zone, and its concentration and escape rate value can sensitively and objectively reflect the underground stress, strain state and tectonic activity state, so it is often used to identify the activity state of fracture zone, explore buried fault and research seismic risk. By collecting and analyzing soil gas, the fault location and activity characteristics can be revealed.

[0004] Although the existing soil gas collector can collect soil gas, if different depths of soil are to be collected, it needs to be collected in several times, which reduces the collection efficiency of soil gas. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the utility model provides a kind of soil gas layered collection device to solve the problem of low collection efficiency in the process of collecting different depth soil gas in prior art.

[0006] A kind of soil gas layered collection device, including sampling pipe, the pipe wall of the sampling pipe is equipped with multiple layers annular distribution air inlet one, the top of the sampling pipe is equipped with mounting block, the mounting block is equipped with movable vertical through conveying gas pipe, the conveying gas pipe one end extends to the inside of the sampling pipe, the bottom of the conveying gas pipe is equipped with air inlet disc, the air inlet disc is distributed with air inlet two;

[0007] It further includes lifting pipe, the lifting pipe is movably sleeved on the conveying gas pipe, the bottom wall of the lifting pipe and the bottom of the air inlet disc are equipped with sealing assembly, and the sealing assembly is movably attached to the inner wall of the sampling pipe.

[0008] Preferably, the other end of the conveying gas pipe is equipped with connected transmission hose, the other end of the transmission hose is connected with negative pressure collection box, one side of the negative pressure collection box is equipped with sampling pump connected with external power supply, and the sampling pump is connected with the negative pressure collection box.

[0009] Preferably, the conveying air pipe and the lifting pipe are made of plastic material, and the length of the conveying air pipe is greater than the length of the lifting pipe, and the length of the lifting pipe is greater than the length of the sampling pipe.

[0010] Preferably, the conveying air pipe and the lifting pipe are provided with scale lines distributed at intervals.

[0011] Preferably, the sealing assembly comprises a lifting disc and a sealing ring, the lifting disc is fixedly connected to the bottom of the lifting pipe and the air inlet disc respectively, the sealing ring is arranged on the outer wall of the lifting disc and movably attached to the inner wall of the sampling pipe, and the number of layers of the sealing ring is not less than two.

[0012] Preferably, the bottom of the mounting block is provided with a threaded ring, the threaded ring is in threaded cooperation with the sampling pipe, and the lifting pipe and the conveying air pipe pass through the threaded ring.

[0013] Preferably, handrails are symmetrically arranged on the two sides of the mounting block.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、The utility model discloses a sampling pipe, a mounting block is arranged at the top of the sampling pipe, a movable conveying air pipe is arranged on the mounting block, a lifting disc is sleeved on the conveying air pipe, and sealing assemblies are connected to the bottom of the air inlet disc and the lifting disc respectively.

[0016] When the collection is completed, the lifting disc is moved by moving the lifting pipe, and then the conveying air pipe is moved to re-adjust the distance between the two sealing assemblies, and the soil gas in the height is collected again, so that the sampling pipe does not need to be moved after being inserted into the soil, thereby realizing the stratified collection of soil gas and improving the collection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole soil gas stratified sampling part structure schematic view of the utility model;

[0018] Figure 2 It is a sampling pipe internal part structure sectional view of the utility model;

[0019] Figure 3 It is a conveying air pipe and lifting pipe and other part structure schematic view of the utility model;

[0020] Figure 4 It is the schematic diagram of the mounting block and the threaded ring part structure of the utility model.

[0021] In the drawing:

[0022] 1, sampling tube; 2, air inlet one; 3, mounting block; 4, conveying air pipe; 5, air inlet disc; 6, air inlet two; 7, lifting pipe; 8, transmission hose; 9, negative pressure collection box; 10, sampling pump; 11, scale; 12, lifting disc; 13, sealing ring; 14, threaded ring; 15, handrail. DETAILED DESCRIPTION

[0023] The embodiment of the utility model is further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0024] As shown in the accompanying Figure 1 to the accompanying Figure 4 As shown:

[0025] Example one: the utility model provides a kind of soil gas layered collection device, including sampling tube 1, the pipe wall of sampling tube 1 is equipped with multiple layers annular distribution air inlet one 2, the top of sampling tube 1 is equipped with mounting block 3, movable vertical through conveying air pipe 4 is equipped on mounting block 3, one end of conveying air pipe 4 extends to sampling tube 1 inside, and the bottom of conveying air pipe 4 is equipped with air inlet disc 5, and air inlet two 6 is distributed on air inlet disc 5.

[0026] It further includes lifting pipe 7, lifting pipe 7 is movably sleeved on conveying air pipe 4, and the bottom wall of lifting pipe 7 is equipped with sealing assembly with the bottom of air inlet disc 5, and sealing assembly is movably attached on the inner wall of sampling tube 1.

[0027] It needs to be explained that by being equipped with sampling tube 1, mounting block 3 is arranged on the top of sampling tube 1, movable conveying air pipe 4 is arranged on mounting, lifting disc 12 is sleeved on conveying air pipe 4, and sealing assembly is connected to the bottom of air inlet disc 5 and lifting disc 12 respectively, after air inlet disc 5 is adjusted to the appropriate position in sampling tube 1, the interval between the two sealing assemblies can be adjusted by moving lifting pipe 7, soil gas enters inside from air inlet one 2 on sampling tube 1, is then conveyed to conveying air pipe 4 from air inlet two 6, and enters the collection bag in negative pressure collection box 9 in transmission hose 8.

[0028] After collection is completed, lifting disc 12 is moved by moving lifting pipe 7, and then conveying air pipe 4 is moved, so that the interval between the two sealing assemblies can be re-adjusted, and the soil gas in this height is collected again, so that after collection tube is inserted into soil, sampling tube 1 does not need to be moved, so that layered collection of soil gas can be realized, and the collection efficiency is improved.

[0029] In this embodiment, the other end of the conveying air pipe 4 is provided with a connected conveying hose 8, the other end of the conveying hose 8 is connected with a negative pressure collection box 9, one side of the negative pressure collection box 9 is provided with a sampling pump 10 connected with an external power supply, and the sampling pump 10 is connected with the negative pressure collection box 9.

[0030] It should be noted that the inside of the negative pressure collection box 9 has a collection bag, when the sampling pump 10 is started, the soil gas in the soil will be finally pumped into the collection bag in the negative pressure collection box 9, so as to realize the collection of the soil gas, the material of the conveying air pipe 4 is soft material, the conveying air pipe 4 can be sleeved on the conveying air pipe 4 made of plastic material, and the connection is convenient.

[0031] In this embodiment, the conveying air pipe 4 and the lifting pipe 7 are made of plastic material, and the length of the conveying air pipe 4 is greater than the length of the lifting pipe 7, and the length of the lifting pipe 7 is greater than the length of the sampling pipe 1.

[0032] It should be noted that by designing the conveying air pipe 4 and the lifting pipe 7 to be made of plastic material, the strength of the conveying air pipe 4 and the lifting pipe 7 is improved, and the conveying air pipe 4 and the lifting pipe 7 are conveniently moved in the inside of the sampling pipe 1.

[0033] In this embodiment, the conveying air pipe 4 and the lifting pipe 7 are provided with scale lines 11 distributed at intervals.

[0034] It should be noted that by providing the scale lines 11 on the conveying air pipe 4 and the lifting pipe 7, when the conveying air pipe 4 and the lifting pipe 7 are moved in height, the scale lines 11 on the top of the lifting pipe 7 and the scale lines 11 on the conveying air pipe 4 are compared, so that the depth of collecting soil gas under the soil and the height of layered sampling can be known.

[0035] In this embodiment, the sealing assembly includes a lifting disc 12 and a sealing ring 13, the lifting disc 12 is fixedly connected to the bottom of the lifting pipe 7 and the air inlet disc 5 respectively, the sealing ring 13 is arranged on the outer wall of the lifting disc 12 and movably attached to the inner wall of the sampling pipe 1, and the number of layers of the sealing ring 13 is not less than two.

[0036] It should be noted that by providing the sealing assembly, the sealing assembly can ensure the sealing of the soil gas collection space, so as to reduce the leakage of the soil gas into other positions after entering the collection space in the inside of the sampling pipe 1 in the collection process, and improve the accuracy of the soil gas in the collection space.

[0037] In this embodiment, the bottom of the mounting block 3 is provided with a threaded ring 14, the threaded ring 14 is in threaded cooperation with the sampling pipe 1, and the lifting pipe 7 and the conveying air pipe 4 pass through the threaded ring 14.

[0038] It needs to be explained that the mounting block 3 is locked on the sampling pipe 1 through the threaded ring 14, which realizes detachable connection, and the sampling pipe 1 can be quickly assembled and disassembled.

[0039] In the embodiment, handrails 15 are symmetrically arranged on both sides of the mounting block 3.

[0040] It needs to be explained that when the sampling pipe 1 is inserted into the pre-made hole position, the mounting block 3 is driven to insert into the hole by holding the handrails 15, thereby improving the stability of insertion into the hole.

[0041] When the soil gas needs to be collected, the soil is punched, the mounting block 3 is connected to the sampling pipe 1, the sampling pipe 1 is inserted into the hole position through the handrails 15, the air inlet disc 5 is lowered to the bottom of the sampling pipe 1 by moving the conveying air pipe 4, the other end of the conveying air pipe 4 is connected to the transmission hose 8, the lifting pipe 7 is moved, the lifting disc 12 at the bottom is lowered to the appropriate height, the sampling pump 10 is started, the soil gas in the soil is extracted to enter the sampling pipe 1 through the air inlet one 2, enter the conveying air pipe 4 through the air inlet two 6 on the air inlet disc 5, enter the transmission hose 8 through the conveying air pipe 4, and finally enter the collection bag in the negative pressure collection box 9, thereby realizing the collection of soil gas at a height.

[0042] When different layer soil gas needs to be collected, a new collection bag is replaced, the lifting pipe 7 is pulled to drive the lifting disc 12 to move upwards, the conveying air pipe 4 is pulled to drive the air inlet disc 5 to move upwards, the conveying air pipe 4 and the lifting pipe 7 have scale lines 11, the height of upward movement can be known by observing the scale lines 11, and the soil gas in the interval is collected again after adjusting to the appropriate height, thereby realizing the collection of soil gas at different heights.

[0043] The embodiments of the utility model are given for example and description, although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A soil gas zonal collection apparatus, comprising: Include: The sampling pipe (1), the pipe wall of the sampling pipe (1) is provided with a plurality of layers of annularly distributed air inlet one (2), the top of the sampling pipe (1) is provided with a mounting block (3), the mounting block (3) is provided with a movable vertical through conveying air pipe (4), one end of the conveying air pipe (4) extends into the sampling pipe (1), the bottom of the conveying air pipe (4) is provided with an air inlet disc (5), the air inlet disc (5) is distributed with air inlet two (6); It also includes a lifting pipe (7), the lifting pipe (7) is movably sleeved on the conveying air pipe (4), the bottom wall of the lifting pipe (7) and the bottom of the air inlet disc (5) are provided with a sealing assembly, and the sealing assembly is movably attached to the inner wall of the sampling pipe (1).

2. The soil gas zonal collection apparatus of claim 1, wherein: The other end of the conveying air pipe (4) is provided with a connected transmission hose (8), the other end of the transmission hose (8) is connected with a negative pressure collection box (9), one side of the negative pressure collection box (9) is provided with a sampling pump (10) connected with an external power supply, and the sampling pump (10) is connected with the negative pressure collection box (9).

3. The soil gas zonal isolation collection apparatus of claim 1, wherein: The conveying air pipe (4) and the lifting pipe (7) are made of plastic material, and the length of the conveying air pipe (4) is greater than the length of the lifting pipe (7), and the length of the lifting pipe (7) is greater than the length of the sampling pipe (1).

4. The soil gas zonal isolation collection apparatus of claim 3, wherein: The conveying air pipe (4) and the lifting pipe (7) are provided with spaced apart scale lines (11).

5. The soil gas zone sampling apparatus of claim 1, wherein: The sealing assembly includes a lifting disc (12) and a sealing ring (13), the lifting disc (12) is fixedly connected to the bottom of the lifting pipe (7) and the air inlet disc (5) respectively, the sealing ring (13) is arranged on the outer wall of the lifting disc (12) and movably attached to the inner wall of the sampling pipe (1), and the number of layers of the sealing ring (13) is not less than two.

6. The soil gas zone sampling apparatus of claim 1, wherein: The bottom of the mounting block (3) is provided with a threaded ring (14), the threaded ring (14) and the sampling pipe (1) are in threaded cooperation, and the lifting pipe (7) and the conveying air pipe (4) pass through the threaded ring (14).

7. The soil gas zone sampling apparatus of claim 6, wherein: The mounting block (3) is provided with a handrail (15) on both sides.

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