Pneumatic soil sampling device

Abstract

The utility model provides a pneumatic soil sampling device. The pneumatic soil sampling device comprises an air cylinder and a piston reciprocating in the air cylinder, the piston divides the air cylinder into an upper cavity and a lower cavity, the side, close to the upper cavity, of the piston is connected with a first handle, and the first handle extends out of the outer side of the top of the air cylinder; the side, close to the lower cavity, of the piston is connected with a soil sampling rod, the soil sampling rod extends out of the outer side of the bottom of the air cylinder, and a collecting cavity is formed in the end of the outer side of the soil sampling rod; the upper cavity and the lower cavity are filled with inert gas. According to the pneumatic principle, the working efficiency of soil sampling is improved, physical output of sampling personnel is reduced, and the soil sampler is small in size, light in weight and convenient to carry outdoors.

Description

Technical Field

[0001] The utility model relates to a soil taking device, in particular to a pneumatic soil taking device. Background Art

[0002] Soil sampling is an important part of conducting soil environmental quality investigations, and is generally carried out using special soil sampling devices.

[0003] Existing soil sampling devices, such as a rock and soil sample collection device disclosed in the existing patent publication number CN115389262A, include a positioning frame, a threaded push rod and a driving mechanism connected to the threaded push rod are provided on the positioning frame, and a collection drill tube is provided at the lower end of the threaded push rod. The driving mechanism includes a motor, an active bevel gear connected to the motor, and a driven bevel gear meshing with the active bevel gear, and the driven bevel gear is sleeved on the threaded push rod. The threaded push rod and the collection drill tube thereon are driven to move up and down by the driving mechanism to achieve soil sampling. The structure of its driving mechanism is relatively complex, and the processing accuracy requirements of the active bevel gear, the driven bevel gear and the threaded push rod are relatively high, resulting in high manufacturing and maintenance costs. It is more suitable for hard rock and soil samples, but the cost is too high for sampling general soil (referring to soil with lower hardness). Utility Model Content

[0004] The utility model aims to provide a pneumatic soil taking device with simple structure and cost saving.

[0005] The technical solution of the utility model is: a pneumatic soil-taking device, comprising a cylinder and a piston reciprocating in the cylinder, the piston dividing the cylinder into an upper chamber and a lower chamber, the side of the piston close to the upper chamber is connected to a first handle, and the first handle extends out of the top outside of the cylinder; the side of the piston close to the lower chamber is connected to a soil-taking rod, the soil-taking rod extends out of the bottom outside of the cylinder, and a collection chamber is arranged on the outer end of the soil-taking rod; the upper chamber and the lower chamber are filled with inert gas.

[0006] In the above scheme, a cylinder filled with inert gas is designed. On the one hand, when the piston is pushed downward by the first handle, the volume of the inert gas in the lower chamber becomes smaller, generating downward pressure, pushing the soil picking rod downward, so that the soil picking rod can be easily inserted into the soil. On the other hand, when the first handle is released, the inert gas in the lower chamber needs to restore its volume and push the piston upward, making the volume of the inert gas in the upper chamber smaller, generating upward pressure, pushing the first handle upward, thereby driving the soil sample to be extracted from the soil, which is more labor-saving, simpler in structure, more convenient to use, and reduced in use and maintenance costs.

[0007] Preferably, the inner diameter of the upper cavity is larger than the inner diameter of the lower cavity.

[0008] Preferably, the first handle includes a horizontally arranged first rod and a vertically arranged second rod, the first rod is placed outside the cylinder, one end of the second rod is connected to the piston, and the other end of the second rod is connected to the first rod.

[0009] Preferably, the bottom of the cylinder is provided with a first sleeve extending downward and outward, the top of the cylinder is provided with a second sleeve extending upward, and the first sealing ring and the second sealing ring are provided on the soil picking rod at intervals; the soil picking rod is passed through the first sleeve, so that the first sealing ring is slidably set in the first sleeve; the first handle is passed through the second sleeve, so that the second sealing ring is slidably set in the second sleeve.

[0010] Preferably, the soil sampling rod comprises a third rod, a fourth rod and a drill bit which are connected in sequence, the third rod extends into the cylinder and is connected to the piston, and the collection chamber is arranged on the drill bit.

[0011] Preferably, scale lines are provided along the length direction of the fourth rod.

[0012] Preferably, the cross section of the collecting cavity is a C-shape that bends upward, and the collecting cavity penetrates downward.

[0013] Preferably, a cutting edge is provided at the end of the soil sampling rod, and the cutting edge is communicated with the collecting chamber.

[0014] Preferably, the blade portion is in the shape of an arc convexly extending downward.

[0015] Preferably, a second handle extending horizontally is also provided on the outer wall of the cylinder.

[0016] Compared with the related art, the beneficial effects of the utility model are:

[0017] 1. Design a special cylinder filled with inert gas. On the one hand, when the piston is pushed downward by the first handle, the volume of the inert gas in the lower chamber becomes smaller, generating downward pressure, pushing the soil-taking rod downward, so that the soil-taking rod can be easily inserted into the soil. On the other hand, when the first handle is released, the inert gas in the lower chamber needs to recover its volume and push the piston upward, so that the volume of the inert gas in the upper chamber becomes smaller, generating upward pressure, pushing the first handle upward, thereby driving the soil sample to be extracted from the soil, making soil taking more labor-saving;

[0018] 2. The soil sampling device has a simpler structure, is more convenient to use, and has lower use and maintenance costs; it improves the work efficiency of soil sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing the structure of the pneumatic soil taking device provided by the utility model and the perspective view of the inside of the cylinder;

[0020] Figure 2 for Figure 1 A in the figure is enlarged and cut away;

[0021] Figure 3 for Figure 1 The B in the figure is enlarged and cross-sectionally shown.

[0022] In the accompanying drawings: 1. cylinder; 11. upper chamber; 12. lower chamber; 2. piston; 3. first handle; 31. first rod; 32. second rod; 4. soil sampling rod; 41. collection chamber; 42. third rod; 43. fourth rod; 44. drill bit; 45. blade; 13. sleeve; 5. inert gas; 6. second handle; 7. first sealing ring; 8. second sealing ring. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0024] like Figure 1 As shown, a pneumatic soil-taking device provided in this embodiment includes a cylinder 1, a piston 2, a first handle 3, a soil-taking rod 4, an inert gas 5 and a second handle 6.

[0025] The cylinder 1 is a self-made cylinder with a closed structure, and a piston 2 is arranged therein. The piston 2 separates the cylinder 1 into an upper chamber 11 and a lower chamber 12. The upper chamber 11 and the lower chamber 12 are filled with an inert gas 5, which is nitrogen. The inner diameter of the upper chamber 11 is larger than the inner diameter of the lower chamber 12.

[0026] The first handle 3 includes a horizontally arranged first rod 31 and a vertically arranged second rod 32. The first rod 31 is placed outside the cylinder 1, one end of the second rod 32 extends into the upper chamber 11 and is connected to the piston 2, and the other end of the second rod 32 is connected to the first rod 31.

[0027] The piston 2 can be pushed downward by pressing the first handle 3, and the piston 2 then pushes the soil-picking rod 4 downward together to extend into the soil.

[0028] The soil sampling rod 4 includes a third rod 42, a fourth rod 43 and a drill bit 44 connected in sequence, the third rod 42 extends into the cylinder 1 and is connected to the piston 2, and the collection chamber 41 is arranged on the drill bit 44. The second rod 32, the piston 2, the third rod 42 and the fourth rod 43 are an integrated structure.

[0029] like Figure 2 , Figure 3As shown, the bottom of the cylinder 1 is provided with a first sleeve 13 extending downward and outward, and the top of the cylinder 1 is provided with a second sleeve 14 extending upward. A first sealing ring 7 is sleeved between the third rod 42 and the fourth rod 43 of the soil-taking rod 4. A second sealing ring 8 is sleeved on the second rod 32. The soil-taking rod 4 is penetrated by the first sleeve 13, so that the first sealing ring 7 is slidably set in the first sleeve 13. The first sealing ring 7 is in contact with the inner wall of the first sleeve 13 to play a sealing role, and at the same time, the first sealing ring 7 is close to the inner wall surface of the cavity of the cylinder 1 to be pushed by the inert gas in the lower cavity 12. The first handle 3 is penetrated by the second sleeve 14, so that the second sealing ring 8 is slidably set in the second sleeve 14. Similarly, the second sealing ring 8 is in contact with the inner wall of the second sleeve 14 to play a sealing role. The second sealing ring 8 is close to the inner wall surface of the cavity of the cylinder 1 to be pushed by the inert gas in the upper cavity 11.

[0030] In addition, the height of the third rod 42 and the lower cavity 12 needs to be designed to be of appropriate size to meet the sampling depth required by the design.

[0031] The fourth rod 43 is provided with scale lines in the length direction thereof. The scale lines are laser scale lines, which are convenient for measuring the depth of the soil taking rod 4 entering the soil when taking soil.

[0032] like Figure 1 As shown, the cross section of the collection chamber 41 is a C-shape that bends upward, and the collection chamber 41 is through downward. A blade 45 is provided at the end of the soil-taking rod 4, and the blade 45 is connected to the collection chamber 41. The blade 45 is in the shape of an arc that protrudes downward. The thickness of the blade 45 gradually decreases, and the end is sharp, which is convenient for inserting into the soil and shoveling the soil. During the insertion of the blade 45, the loosened soil enters the collection chamber 41, and the C-shaped structure is conducive to the collection of soil.

[0033] A second handle 6 extending horizontally is also provided on the outer wall of the cylinder 1. The second handle 6 is arranged on both sides of the cylinder 1.

[0034] When sampling, the operator holds the soil extraction device and places the drill bit 44 of the soil extraction rod 4 at the soil to be sampled. The operator pushes the first handle 3 downward to move the piston 2 downward, squeezing the inert gas 5 in the lower chamber 12, reducing the volume of the inert gas 5 in the lower chamber 12 and generating pressure. Because the inner diameter of the lower chamber 12 is smaller than the inner diameter of the upper chamber 11, the inert gas 5 in the lower chamber 12 is squeezed to generate a large thrust acting on the first sealing ring 7, thereby pushing the first sealing ring 7 downward, causing the piston 2 to move downward, the soil extraction rod 4 to move downward, and the drill bit 44 to enter the soil. Observe the scale line on the fourth rod 43. When the depth reaches the sampling requirement, the operator releases the first handle 3 and then holds the soil extraction device on the second handle 6. At this time, the thrust of the piston 2 moving downward is released, and the inert gas 5 in the lower chamber 12 wants to restore its volume, thereby generating a reaction force on the piston 2, and the piston 2 moves upward. The upward piston 2 reduces the volume of the inert gas 5 in the upper chamber 11 and generates an upward thrust acting on the second sealing ring 8 to push the second sealing ring 8 upward, thereby pushing the soil extraction rod 4 upward. The rebound force generated by the inert gas 5 in the lower chamber 12 and the pressure generated by the inert gas 5 in the upper chamber 11 work together to assist the soil extraction device to be lifted, making it easier for the operator to lift the soil extraction device. When the drill bit 44 extends out of the soil, the soil sample is taken out from the collection chamber 41; the sampling is completed. The working principle of the inert gas 5 is similar to that of the existing patent CN105485233A (oil and gas damper).

[0035] The pneumatic soil sampling device of the utility model utilizes the pneumatic principle to improve the working efficiency of soil sampling and reduce the physical exertion of sampling personnel. It is also small in size and light in weight, and is convenient to carry in the field.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pneumatic soil taking device, characterized in that: The invention comprises a cylinder (1) and a piston (2) reciprocating in the cylinder (1), the piston (2) dividing the cylinder (1) into an upper chamber (11) and a lower chamber (12), the side of the piston (2) close to the upper chamber (11) being connected to a first handle (3), the first handle (3) extending out of the top outside of the cylinder (1); the side of the piston (2) close to the lower chamber (12) being connected to a soil taking rod (4), the soil taking rod (4) extending out of the bottom outside of the cylinder (1), and a collection chamber (41) being arranged on the outer end of the soil taking rod (4); the upper chamber (11) and the lower chamber (12) being filled with an inert gas (5).

2. The pneumatic soil taking device according to claim 1, characterized in that: The inner diameter of the upper chamber (11) is greater than the inner diameter of the lower chamber (12).

3. The pneumatic soil taking device according to claim 1, characterized in that: The first handle (3) comprises a first rod (31) arranged horizontally and a second rod (32) arranged vertically, the first rod (31) being disposed outside the cylinder (1), one end of the second rod (32) being connected to the piston (2), and the other end of the second rod (32) being connected to the first rod (31).

4. The pneumatic soil taking device according to claim 1, characterized in that: The bottom of the cylinder (1) is provided with a first sleeve (13) extending downwardly, the top of the cylinder (1) is provided with a second sleeve (14) extending upwardly, the soil picking rod (4) is provided with a first sealing ring (7), and the first handle (3) is provided with a second sealing ring (8); the soil picking rod (4) is passed through the first sleeve (13), so that the first sealing ring (7) is slidably arranged in the first sleeve (13); the first handle (3) is passed through the second sleeve (14), so that the second sealing ring (8) is slidably arranged in the second sleeve (14).

5. The pneumatic soil taking device according to claim 1, characterized in that: The soil collecting rod (4) comprises a third rod (42), a fourth rod (43) and a drill bit (44) which are connected in sequence; the third rod (42) extends into the cylinder (1) and is connected to the piston (2); and the collecting chamber (41) is arranged on the drill bit (44).

6. The pneumatic soil taking device according to claim 5, characterized in that: The fourth rod (43) is provided with scale lines in the length direction thereof.

7. The pneumatic soil taking device according to claim 1, characterized in that: The cross section of the collection cavity (41) is in a C-shape that bends upward, and the collection cavity (41) is through-going downward.

8. The pneumatic soil taking device according to claim 1, characterized in that: A cutting edge (45) is provided at the end of the soil collecting rod (4), and the cutting edge (45) is communicated with the collecting chamber (41).

9. The pneumatic soil taking device according to claim 8, characterized in that: The blade portion (45) is in the shape of an arc extending downward.

10. The pneumatic soil taking device according to claim 1, characterized in that: A second handle (6) extending horizontally is also provided on the outer wall of the cylinder (1).

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