Soil profile gas collection device

Abstract

The utility model relates to the technical field of grassland soil gas collection, in particular to a soil profile gas collection device which comprises a supporting cylinder, four groups of partition plates arranged from top to bottom are fixedly installed in the supporting cylinder, each partition plate is composed of a first plate body and a second plate body, each second plate body is provided with an L-shaped vent hole communicated with the outside, and the opening of each vent hole faces upwards. The supporting cylinder is divided into four cavities through four sets of partition plates, four organic glass tubes extending into the four cavities respectively are fixedly installed on the supporting cylinder, a three-way valve is fixedly installed at the top of each organic glass tube, and a gas suction cylinder used for extracting gas is arranged on each three-way valve. According to the utility model, the four chambers are uniformly arranged in the supporting cylinder, so that gases with different depths can enter the corresponding chambers. And a pressure applying plate is arranged on the supporting cylinder, so that the supporting cylinder can stably move downwards into the soil.

Description

Technical Field

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

[0002] Soil gas is the gas found in the air spaces between soil components. The spaces between solid soil particles, if they do not contain water, are filled with air.

[0003] Grassland soil has a thick texture, and the soil greenhouse gas flux is mostly concentrated in the soil surface, which requires the use of collection equipment to collect the gas. The current collection equipment will extend the plexiglass tube into the ground when collecting the gas, and collect the gas through the suction cylinder. However, the current collection equipment cannot collect gas at different positions according to the depth of the ground, which makes the collected gas different during detection; and because the collection equipment requires manual pressing and manual support by the operator, the collection equipment may tilt or flip during the support process, which not only increases the operator's workload, but also makes the stability of the plexiglass tube not guaranteed when moving downward. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the collection equipment in the prior art needs manual pressing and supporting when collecting soil gas, and to propose a soil profile gas collection device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A soil profile gas collection device includes a support tube, in which four groups of partitions arranged from top to bottom are fixedly installed, and the partitions are composed of plate body one and plate body two. Plate body two is provided with an air vent connected to the outside world, and the air vent is L-shaped with the opening facing upward. The support tube is divided into four chambers by the four groups of partitions, and four organic glass tubes extending into the four chambers respectively are fixedly installed on the support tube, and a three-way valve is fixedly installed on the top of the organic glass tube, and the three-way valve is provided with an air suction cylinder for extracting gas.

[0007] Preferably, a pressure plate is provided on the support tube, a sleeve and a cylinder are fixedly mounted on the pressure plate, a reinforcement plate connected to the output end of the cylinder is fixedly mounted on the support tube, and a reinforced PVC pipe for protecting the support tube is provided on the reinforcement plate, and a support assembly for supporting the support tube is provided in the sleeve.

[0008] Preferably, the reinforcement plate is an annular structure, and a positioning column extending into the ground is provided on the reinforcement plate;

[0009] The reinforced PVC tube is a hollow ring structure, and the sleeves are vertically arranged on both sides of the pressure plate.

[0010] Preferably, the support assembly includes a moving rod slidably mounted in a sleeve, and a reinforcement rod is integrally connected to the moving rod to support the support tube. A spring is welded between the moving rod and the sleeve, and a pin shaft on the reinforcement rod is installed with two interference rods to support the reinforcement rod.

[0011] Preferably, the reinforcing rod and the moving rod extend to the lower end position outside the sleeve, and the spring is vertically welded to the upper end position of the moving rod extending into the sleeve.

[0012] Preferably, a limiting frame connected to the moving rod is provided in the sliding sleeve of the sleeve, the limiting frame is a T-shaped structure, and a fixing bolt corresponding to the sleeve is threadedly connected to the limiting frame.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The utility model provides evenly distributed partitions in the support tube, so that organic glass tubes of different depths can improve the accuracy of gas detection. By providing a reinforcement plate and a reinforced PVC tube on the support tube, the reinforced PVC tube can protect the downward-moving support tube, so that the support tube can be smoothly moved downward into the soil.

[0015] 2. The utility model supports the support tube by means of a pressure plate, and applies pressure to the limit frame, so that the limit frame drives the reinforcement rod and the resistance rod to support the support tube, thereby reducing the operator's workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the soil profile gas collection device proposed by the present invention;

[0017] Figure 2 This is a side view of the soil profile gas collection device proposed by the present invention;

[0018] Figure 3 This is a cross-sectional view of the soil profile gas collection device proposed by the present invention;

[0019] Figure 4 This is a schematic diagram of the second plate of the soil profile gas collection device proposed by the present invention;

[0020] Figure 5 This is a second cross-sectional view of the plate body of the soil profile gas collection device proposed by the present invention.

[0021] In the figure: 1. Support tube; 2. Plate body 1; 3. Organic glass tube; 4. Three-way valve; 5. Air pump; 6. Pressure plate; 7. Sleeve; 8. Cylinder; 9. Reinforcement plate; 10. Reinforced PVC tube; 11. Moving rod; 12. Reinforcement rod; 13. Spring; 14. Resistance rod; 15. Limiting frame; 16. Plate body 2; 17. Vent. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-Figure 5 The soil profile gas collection device includes a support tube 1, in which four groups of baffles arranged from top to bottom are fixedly installed, and the baffles are composed of a plate body 2 and a plate body 16. A vent 17 communicating with the outside is opened on the plate body 16, and the vent 17 is L-shaped and the opening faces upward. The support tube 1 is divided into four chambers by the four groups of baffles. Four organic glass tubes 3 extending into the four chambers are fixedly installed on the support tube 1, and a three-way valve 4 is fixedly installed on the top of the organic glass tube 3. The three-way valve 4 is provided with an air suction cylinder 5 for extracting gas;

[0024] According to the instruction manual Figure 3 As shown, the number of through holes for installing the organic glass tube 3 is different in the plate body 1 of the four groups of partitions: the first group of plate body 1 is provided with four through holes, the second group of plate body 2 is provided with three through holes, the third group of plate body 1 is provided with two through holes, and the fourth group of plate body 1 is provided with one through hole. This means that except for the organic glass tube 3 passing through the plate body 1 2 of each layer, the gas between different chambers is in an isolated state, so that the gas in each cavity will not mix;

[0025] By setting four sets of evenly distributed partitions on the support tube 1, and through the partitions and four organic glass tubes 3, soil gas at different depths can be collected. In this way, the gas entering each chamber corresponds to a different soil layer, and the four chambers correspond to four soil layers at different heights.

[0026] The support tube 1 is made of PVC, with a diameter of 5 cm and four independent chambers. Each chamber is 10 cm high, and the total height is about 42 cm, of which 40 cm is buried underground and 2 cm is exposed above the surface.

[0027] A pressure plate 6 is provided on the support tube 1, and a sleeve 7 and a cylinder 8 are fixedly installed on the pressure plate 6. A reinforcing plate 9 connected to the output end of the cylinder 8 is fixedly installed on the support tube 1, and a reinforced PVC tube 10 is provided on the reinforcing plate 9 for protecting the support tube 1. The output end of the cylinder 8 drives the reinforcing plate 9 and the reinforced PVC tube 10 to move downward synchronously. The reinforced PVC tube 10 can ensure the stability of the support tube 1 when moving downward, so that the support tube 1 will not break;

[0028] The reinforcement plate 9 is an annular structure, and a positioning column extending into the ground is provided on the reinforcement plate 9. The reinforced PVC pipe 10 is a hollow annular structure, and the sleeve 7 is vertically arranged on both sides of the pressure plate 6.

[0029] A support assembly for supporting the support tube 1 is provided in the sleeve 7;

[0030] The support assembly includes a moving rod 11 that is slidably sleeved in the sleeve 7, and a reinforcement rod 12 is integrally connected to the moving rod 11 to support the support tube 1. A spring 13 is welded between the moving rod 11 and the sleeve 7. The sleeve 7 guides the moving rod 11 so that the moving rod 11 can smoothly pull the reinforcement rod 12 and the limit frame 15 when moving;

[0031] The reinforcement rod 12 and the mobile rod 11 extend to the lower end position outside the sleeve 7, and the spring 13 is vertically welded to the upper end position of the mobile rod 11 extending into the sleeve 7. The pin on the reinforcement rod 12 is equipped with two abutment rods 14 for supporting the reinforcement rod 12. A limit frame 15 connected to the mobile rod 11 is slidably sleeved in the sleeve 7. The limit frame 15 is a T-shaped structure, and a fixing bolt corresponding to the sleeve 7 is threadedly connected to the limit frame 15.

[0032] The mobile rod 11 drives the reinforcement rod 12 to extend to the ground, and the two interference rods 14 are deflected to support and protect the support tube 1. The downward movement of the output end of the cylinder 8 drives the support tube 1 to move downward, and the positioning column, the reinforcement rod 12, and the interference rod 14 support the support tube 1, making it more convenient for the support tube 1 to collect soil gas.

[0033] It should be noted that the specific models and specifications of the three-way valve 4, the suction tube 5, and the cylinder 8 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it is not repeated here.

[0034] The functional principle of this utility model can be explained through the following operation modes:

[0035] The operator supports the pressure plate 6, and the output end of the cylinder 8 drives the reinforcement plate 9 to move downward. The reinforcement plate 9 drives the reinforced PVC pipe 10 and the support tube 1 to move downward synchronously. The support tube 1 contacts the ground under the protection of the reinforced PVC pipe 10;

[0036] The traction and interference rod 14 is deflected to the positions on both sides of the reinforcement rod 12;

[0037] The operator applies pressure to the limit frame 15, and the limit frame 15 drives the movable rod 11 to move downward when it moves downward. When the movable rod 11 moves downward, it drives the reinforcement rod 12 to move downward to the outside of the sleeve 7. The spring 13 is stressed, and the limit frame 15 is connected to the sleeve 7 using a fixing bolt;

[0038] As the support tube 1 continues to move downward, it drives the positioning column and the reinforced PVC pipe 10 to extend into the ground;

[0039] Four organic glass tubes 3 of different heights can collect gas at different depths;

[0040] When it is necessary to collect gas at a specified depth, the suction cylinder 5 is matched with one of the three-way valves 4. After the suction cylinder 5 is opened, the pressure in the specified cavity changes, and the external gas enters the specified cavity through the vent 17 at a specified height. The continuous operation of the suction cylinder 5 allows the gas to be extracted into the specified suction cylinder 5 through one of the organic glass tubes 3, and the collected gas is tested.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A soil profile gas collection device, comprising a support cylinder (1), characterized in that: Four groups of partitions arranged from top to bottom are fixedly installed in the support tube (1), and the partitions are composed of plate body one (2) and plate body two (16). Plate body two (16) is provided with a vent hole (17) connected to the outside world, and the vent hole (17) is L-shaped and the opening is upward. The support tube (1) is divided into four chambers by the four groups of partitions. Four organic glass tubes (3) extending into the four chambers are fixedly installed on the support tube (1), and a three-way valve (4) is fixedly installed on the top of the organic glass tube (3). The three-way valve (4) is provided with an air suction cylinder (5) for extracting gas.

2. The soil profile gas collection device according to claim 1, characterized in that: The support tube (1) is provided with a pressure plate (6), a sleeve (7) and a cylinder (8) are fixedly mounted on the pressure plate (6), a reinforcement plate (9) connected to the output end of the cylinder (8) is fixedly mounted on the support tube (1), and a reinforced PVC pipe (10) for protecting the support tube (1) is provided on the reinforcement plate (9), and a support assembly for supporting the support tube (1) is provided in the sleeve (7).

3. The soil profile gas collection device according to claim 2, characterized in that: The reinforcing plate (9) is an annular structure, and a positioning column extending into the ground is provided on the reinforcing plate (9); The reinforced PVC tube (10) is a hollow annular structure, and the sleeve (7) is vertically arranged on both sides of the pressure plate (6).

4. The soil profile gas collection device according to claim 2, characterized in that: The support assembly comprises a moving rod (11) which is slidably sleeved in a sleeve (7), and a reinforcing rod (12) which is integrally connected to the moving rod (11) and is used to support the support tube (1). A spring (13) is welded between the moving rod (11) and the sleeve (7), and two abutting rods (14) which are used to support the reinforcing rod (12) are installed on a pin shaft on the reinforcing rod (12).

5. The soil profile gas collection device according to claim 4, characterized in that: The reinforcing rod (12) and the moving rod (11) extend to the lower end position outside the sleeve (7), and the spring (13) is vertically welded to the upper end position of the moving rod (11) extending to the inside of the sleeve (7).

6. The soil profile gas collection device according to claim 4, characterized in that: A limiting frame (15) connected to the moving rod (11) is provided in the sliding sleeve of the sleeve (7). The limiting frame (15) is a T-shaped structure, and a fixing bolt corresponding to the sleeve (7) is threadedly connected to the limiting frame (15).

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