Soil gas collecting device

Abstract

The utility model belongs to the technical field of soil gas detection, and particularly relates to a soil gas collecting device which comprises a collecting barrel, a gas collecting pipe is installed at the top end of the collecting barrel and connected with a collecting container, conical teeth are arranged at the bottom end of the collecting barrel, a sealing sleeve is arranged on the collecting barrel, a sleeve is arranged in the sealing sleeve in a sliding and penetrating mode, and the collecting container is connected with the conical teeth. An inner rod is arranged in the sleeve in a penetrating mode, a piston is installed at the bottom end of the sleeve, a plurality of through holes are formed in the piston, the inner rod penetrates through the piston, a sealing plate is installed at the bottom end of the inner rod, a plurality of connecting ropes are fixed to the bottom of the sealing plate, the connecting ropes are connected with stirring blades, and a stud and a handle are installed on the inner rod. A threaded cylinder matched with the stud is arranged on the sleeve, so that the problem that external air is easily introduced from a gap between the collecting cylinder and the ground to damage a sample when gas in the collecting cylinder is sucked out in the prior art is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil gas detection, and in particular relates to a soil gas collection device. Background Art

[0002] Soil is the surface of the earth's land, composed of minerals, organic matter, water, air and organisms. Soil contains many kinds of gases. When using the land, it is necessary to detect the gases in the soil. Before the detection, it is usually necessary to use a soil gas collection device to collect the gases. The "static box method" is one of the commonly used methods. It is usually collected by setting a cylindrical container on the ground. After the collection is completed, the gas in the collection tube is sucked into other containers to complete the collection. Since the gap between the collection tube and the ground is poorly sealed, it is easy to introduce external air from the gap between the collection tube and the ground when sucking out the gas in the collection tube, destroying the sample. Utility Model Content

[0003] Based on the problems mentioned in the above background technology, the utility model provides a soil gas collection device for solving the problem in the prior art that when the gas in the collection tube is sucked out, external air is easily introduced from the gap between the collection tube and the ground to destroy the sample.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A soil gas collection device comprises a collecting cylinder, a gas collecting pipe is installed on the top of the collecting cylinder, the gas collecting pipe is connected to a collecting container, a bevel gear is provided at the bottom of the collecting cylinder, a closing sleeve is provided on the collecting cylinder, a sleeve is slidably passed through the closing sleeve, an inner rod is passed through the sleeve, a piston is installed at the bottom end of the sleeve, a plurality of through holes are provided on the piston, the inner rod passes through the piston and a sealing plate is installed at the bottom end, a plurality of connecting ropes are fixed to the bottom of the sealing plate, the connecting ropes are connected to a stirring sheet, a stud and a handle are installed on the inner rod, and a threaded cylinder matching the stud is provided on the sleeve.

[0006] On the basis of the above technical solution, the present invention also makes the following improvements:

[0007] Furthermore, the lengths of the connecting ropes are not equal. When the connecting ropes are straightened, the stirring blades can be placed at different heights, so that the gas in the collecting cylinder can be better stirred when the inner rod is rotated.

[0008] Furthermore, a plurality of collars are installed at equal intervals on the collecting tube, and a fixing rod is inserted into each collar, and a soil drill is connected to the bottom of the fixing rod, and a limiting ring is installed on the fixing rod, and a hexagonal column is provided on the top of the fixing rod. When collecting gas, the fixing rod is rotated with a hexagonal sleeve to drill the soil drill into the ground, and as the fixing rod descends, the collecting tube is fastened to the soil layer under the action of the limiting ring and is not easy to loosen, so as to better collect gas.

[0009] Furthermore, a magnetic block corresponding to the collar is provided on the collecting tube. When the fixing rod is pulled up, the fixing rod can be attracted by the magnetic block, and the fixing rod is not easy to fall off.

[0010] Furthermore, the outer wall of the threaded barrel is provided with anti-skid patterns, which increase the surface friction resistance of the threaded barrel and facilitate the rotation of the threaded barrel.

[0011] Beneficial effects of the utility model:

[0012] 1. Turn the threaded cylinder to separate the sleeve and the inner rod, and then turn the inner rod to drive the sealing plate and the stirring piece to stir the gas in the collection cylinder, making the gas in the collection cylinder more uniform;

[0013] 2. When taking out the gas in the collection tube, separate the piston and the sealing plate and then push them into the collection tube without squeezing out the gas collected in the collection tube. Then fit the sealing plate and the piston to block the through hole and push the piston upward through the sealing plate to discharge the collected gas above the piston from the gas collecting pipe. The collected gas sample will not change the sample quality due to the negative pressure in the collection tube sucking air from the gap between the bottom of the collection tube and the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0015] Figure 1 The structure of a soil gas collection device in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the installation structure of the soil gas collection device in the embodiment of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 A schematic diagram of the longitudinal structure of a soil gas collection device in an embodiment of the utility model Figure 1 ;

[0019] Figure 5 A schematic diagram of the longitudinal structure of a soil gas collection device in an embodiment of the utility model Figure 2 ;

[0020] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 7 The structure of a soil gas collection device in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0022] The main component symbols are described as follows:

[0023] Land 01, collecting tube 1, collar 11, bevel teeth 12, magnetic block 13, gas collecting pipe 14, closing sleeve 15, fixing rod 2, limiting ring 21, soil drill 22, sleeve 31, inner rod 32, handle 321, stud 322, piston 33, through hole 331, sealing plate 34, connecting rope 341, stirring sheet 342, threaded tube 35. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1 to 6 As shown, a soil gas collection device includes a collecting tube 1, a gas collecting pipe 14 is installed at the top of the collecting tube 1, and the gas collecting pipe 14 is connected to a collecting container. The gas collected in the collecting tube 1 can be transferred from the gas collecting pipe 14 to the collecting container. The bottom of the collecting tube 1 is provided with a bevel gear 12 to facilitate the insertion of the collecting tube 1 into the soil 01. The collecting tube 1 is provided with a closing sleeve 15, and a sleeve 31 is slidably penetrated in the closing sleeve 15. An inner rod 32 is penetrated in the sleeve 31. A piston 33 is installed at the bottom of the sleeve 31. A plurality of through holes 331 are opened on the piston 33. When the through holes 331 are not closed, the piston 33 is pulled The moving piston 33 will not change the air pressure in the collecting tube 1, causing gas leakage or air introduction in the collecting tube 1. The inner rod 32 passes through the piston 33 and is equipped with a sealing plate 34 at the bottom. The sealing plate 34 can close the through hole 331 after being fitted with the piston 33. A plurality of connecting ropes 341 are fixed at the bottom of the sealing plate 34. The connecting ropes 341 are connected with stirring pieces 342. The inner rod 32 is equipped with a stud 322 and a handle 321. The piston 33 and the sealing plate 34 are pulled to the top of the collecting tube 1 and the sealing plate 34 is rotated to stir the gas in the collecting tube 1 through the suspended stirring pieces 342. The sleeve 31 is provided with a threaded barrel 35 matching the stud 322. The threaded barrel 35 can connect the inner rod 32 and the sleeve 31. Pulling the inner rod 32 can drive the sleeve 31 to move synchronously.

[0026] Specifically, the lengths of the connecting ropes 341 are not equal, so that the stirring blades 342 can be at different heights when the connecting ropes 341 are straightened, so that the gas in the collecting tube 1 can be better stirred when the inner rod 32 is rotated.

[0027] Specifically, a plurality of sleeves 11 are installed at equal intervals on the collecting tube 1, and a fixing rod 2 is passed through the sleeves 11. A soil drill 22 is connected to the bottom end of the fixing rod 2, and a limiting ring 21 is installed on the fixing rod 2. A hexagonal column is provided on the top of the fixing rod 2. When collecting gas, the fixing rod 2 is rotated with a hexagonal sleeve to drill the soil drill 22 into the ground. As the fixing rod 2 descends, the limiting ring 21 acts to make the collecting tube 1 tightly buckled into the soil layer and not easy to loosen, so as to better collect gas.

[0028] Specifically, Figure 7 As shown, a magnetic block 13 corresponding to the collar 11 is provided on the collecting tube 1. After the fixing rod 2 is pulled up, the fixing rod 2 can be sucked by the magnetic block 13, and the fixing rod 2 is not easy to fall off.

[0029] Specifically, the outer wall of the threaded barrel 35 is provided with anti-skid patterns, which increase the surface friction resistance of the threaded barrel 35 and facilitate the rotation of the threaded barrel 35 .

[0030] When in use, insert the collecting tube 1 into the soil, ensure that the bevel teeth 12 are tightly embedded in the soil, and then use the hexagonal sleeve to rotate the fixing rod 2 to drill the soil drill 22 into the ground. As the fixing rod 2 descends, the limit ring 21 makes the collecting tube 1 tightly buckled into the soil layer and not easy to loosen, thereby improving the gas collection effect. The piston 33 is located at the top of the collecting tube 1 and is separated from the sealing plate 34 so that the through hole 331 is open. Since the length of each connecting rope 341 is different from that of the stirring blade 342 (such as Figure 4 After the gas is collected, the inner rod 31 is rotated to drive the stirring blade 342 to stir and mix the gas in the collection tube 1. After the mixing is completed, the piston 33 is pushed to the bottom of the collection tube 1. Since the through hole 331 is in an open state, the movement of the piston 33 will not change the gas pressure in the collection tube 1. Then the inner rod 32 is lifted to make the sealing plate 34 fit with the piston 33, and then the threaded cylinder 35 is rotated to connect the sleeve 31 with the stud 322 on the inner rod 32 (as shown in FIG. Figure 5 , Figure 6 As shown), the piston 33 is finally lifted to introduce the collected gas from the gas collecting pipe 14 into the collection container.

[0031] The above is a detailed introduction to a soil gas collection device provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A soil gas collection device, comprising a collecting tube (1), a gas collecting pipe (14) is installed at the top of the collecting tube (1), the gas collecting pipe (14) is connected to a collecting container, and a bevel gear (12) is provided at the bottom of the collecting tube (1), characterized in that: The collecting tube (1) is provided with a sealing sleeve (15), a sleeve (31) is slidably inserted into the sealing sleeve (15), an inner rod (32) is inserted into the sleeve (31), a piston (33) is installed at the bottom end of the sleeve (31), a plurality of through holes (331) are provided on the piston (33), the inner rod (32) passes through the piston (33) and a sealing plate (34) is installed at the bottom end, a plurality of connecting ropes (341) are fixed at the bottom of the sealing plate (34), the connecting ropes (341) are connected to a stirring blade (342), a stud (322) and a handle (321) are installed on the inner rod (32), and a threaded tube (35) matching the stud (322) is provided on the sleeve (31).

2. A soil gas collection device according to claim 1, characterized in that: The lengths of the connecting ropes (341) are not equal.

3. A soil gas collection device according to claim 1, characterized in that: A plurality of collars (11) are installed at equal intervals on the collecting tube (1), a fixing rod (2) is inserted into each collar (11), a soil drill (22) is connected to the bottom end of the fixing rod (2), a limiting ring (21) is installed on the fixing rod (2), and a hexagonal column is provided at the top end of the fixing rod (2).

4. A soil gas collection device according to claim 3, characterized in that: The collecting cylinder (1) is provided with a magnetic attraction block (13) corresponding to the sleeve ring (11).

5. The soil gas collection device according to claim 1, characterized in that: The outer wall of the threaded cylinder (35) is provided with anti-slip grooves.

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