Sampling device and sampling head thereof

Abstract

The utility model discloses a sampling device and a sampling head thereof, the sampling device comprises a sampling cylinder, and the overlook cross section of the sampling cylinder is in a circular ring shape. When the device is used for collecting and sampling planting soil with large viscosity, the drill bit is inserted into a soil layer through the first knife edge to drive the sampling barrel to be inserted, soil entering the sampling barrel forms a sample, after the sampling barrel is inserted in place, the wrench is inserted into the shifting hole to rotate the rotating sleeve, and the gear ring and the gear drive the rotating rod to rotate; and the cutting knife is supported at the lower end of the soil sample, so that the soil sample can be conveniently taken out when the sampling barrel is pulled out, a very complete sample can be collected, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of planting soil sampling and detection, in particular to a sampling device and a sampling head thereof. Background Art

[0002] Currently, it is generally necessary to detect the soil irregularly to facilitate understanding the changes in the soil quality.

[0003] In the prior art, the sampling head for collecting soil is usually in the shape of a spiral drill bit or a straight cylinder. It is easy to sample with a spiral drill bit, but it is impossible to obtain a whole sample. After the straight cylinder-shaped sampling head is inserted into the soil, only the side wall of the soil sample is cut with the soil layer. However, the bottom of the soil sample is still connected to the soil layer. When the straight cylinder-shaped sampling head is lifted, it completely relies on the friction between the soil sample and the inside of the sampling head to break off the soil sample. The breaking position cannot be controlled, which will lead to an incomplete sample, and there is often a situation where the soil sample is not taken out when the sampling head is pulled out. Therefore, it is necessary to improve and optimize the structure of the sampling head of the collection device for planting soil sampling and detection. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a sampling device and a sampling head thereof.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A sampling head includes a sampling cylinder. The top view cross-section of the sampling cylinder is in a circular ring shape. A boss is arranged at the lower end of the sampling cylinder. The outer diameter of the boss is smaller than the outer diameter of the sampling cylinder. A drill bit is fixedly connected to the lower end of the sampling cylinder. A step is arranged on the inner side wall of the drill bit and near the upper end. The outer wall of the boss is fixedly connected to the inner side wall of the step. A receiving ring groove is formed between the lower inner wall of the step and the lower end of the boss. Three rotating rods are arranged on the circular inner side wall of the sampling cylinder. The upper and lower ends of the three rotating rods respectively penetrate through the upper end of the sampling cylinder and the lower end of the boss. One end of the three rotating rods penetrating through the lower end of the boss extends into the receiving ring groove. A cutter structure for cutting the sample is arranged at one end of the three rotating rods extending into the receiving ring groove. A rotating sleeve is rotatably connected to the upper end of the sampling cylinder. One end of the three rotating rods penetrating through the upper end of the sampling cylinder extends into the rotating sleeve. A linkage structure is arranged between one end of the three rotating rods extending into the rotating sleeve and the inner side wall of the rotating sleeve. A connecting rod is fixedly connected to the middle position at the top of the sampling cylinder. One end of the connecting rod away from the sampling cylinder penetrates through the upper wall of the rotating sleeve and a connecting head is arranged at one end of the connecting rod away from the sampling cylinder. A pushing structure for pushing the sample collected into the sampling cylinder out is arranged between the connecting rod and the sampling cylinder.

[0006] As a further description of the above technical solution:

[0007] The cutting knife structure includes three groups of cutting knives, and the three groups of cutting knives are respectively fixedly connected to one end of three groups of rotating rods extending into the interior of the storage ring groove. The cutting knives are arc-shaped when viewed from above, and the inner arc of the arc of the cutting knife is provided with a second blade. The three groups of cutting knives are distributed in order from top to bottom.

[0008] As a further description of the above technical solution:

[0009] The linkage structure includes a gear ring and three sets of gears. The gear ring is arranged on the inner wall of the rotating sleeve. The three sets of gears are respectively fixedly connected to one end of three sets of rotating rods extending into the interior of the rotating sleeve. The outer walls of the three sets of gears are all meshed with the inner wall of the gear ring.

[0010] As a further description of the above technical solution:

[0011] The pushing structure includes a push rod, a toggle rod and a push plate, the push plate being slidably connected to the inner wall of the sampling tube, the push rod being fixedly connected to the upper wall of the push plate, the connecting rod being provided with circular holes distributed along its axial direction, the end of the push rod away from the push plate penetrates the upper wall of the sampling tube and extends into the circular hole of the connecting rod, the front wall and the rear wall of the connecting rod are both provided with a clearance groove which passes through the circular hole, the toggle rod is fixedly connected to the outer wall of the push rod and is located at the end away from the push plate, and the outer wall of the toggle rod is slidably connected to the inner wall of the clearance groove.

[0012] As a further description of the above technical solution:

[0013] A first cutting edge for facilitating the drill bit to cut into the soil is arranged at one end of the drill bit away from the sampling tube.

[0014] As a further description of the above technical solution:

[0015] The rotating sleeve and the connecting rod are locked by a locking screw, and the outer wall of the rotating sleeve is provided with a toggle hole for facilitating the rotation of the rotating sleeve.

[0016] A sampling device comprises a driving part and the above-mentioned sampling head, wherein the sampling head is connected to the driving part via a connecting rod.

[0017] The utility model has the following beneficial effects:

[0018] Compared with the prior art, the sampling device and its sampling head, when collecting samples of planting soil with high viscosity, the drill bit is inserted into the soil layer through the first cutting edge, driving the sampling tube to be inserted, and the soil inside the sampling tube is formed into a sample. After the sampling tube is inserted into place, a wrench is inserted into the toggle hole to rotate the rotating sleeve, and the rotating rod is driven to rotate by the gear ring and the gear, thereby driving the cutting knife to rotate out of the receiving ring groove, cutting off the connection between the soil sample and the soil layer, and supporting it at the lower end of the soil sample, so as to facilitate the removal of the soil sample when the sampling tube is pulled out, so that a very complete sample can be collected, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a sampling device and a sampling head thereof proposed by the utility model;

[0020] Figure 2 This is a partial cross-sectional view of a sampling device and a sampling head thereof, and a drill bit connection structure;

[0021] Figure 3 A partial cross-sectional view of the lower end of the collection tube of a sampling device and a sampling head thereof proposed by the utility model;

[0022] Figure 4 A cross-sectional view of the internal structure of a sampling device and a drill bit of a sampling head thereof proposed by the utility model;

[0023] Figure 5 It is a schematic diagram of the sampling device and the connection structure of the sampling tube and the cutting knife of the sampling head proposed by the utility model when the cutting knife is stored;

[0024] Figure 6 It is a schematic diagram of the connection structure of the sampling tube and the cutting knife of the sampling head of the sampling device and the cutting knife of the sampling head proposed by the utility model when the cutting knife is unfolded;

[0025] Figure 7 The utility model provides a sampling device and a partial cross-sectional view of the rotating sleeve and sampling tube connection structure of the sampling head thereof.

[0026] Legend:

[0027] 1. Sampling tube; 2. Drill bit; 3. First cutting edge; 4. Rotating sleeve; 5. Toggle hole; 6. Push rod; 7. Toggle rod; 8. Connecting rod; 9. Give way groove; 10. Connecting head; 11. Storage ring groove; 12. Rotating rod; 13. Cutting knife; 14. Second cutting edge; 15. Boss; 16. Step; 17. Push plate; 18. Gear; 19. Gear ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figures 1 to 7The utility model provides a sampling head: comprising a sampling tube 1, the sampling tube 1 has a circular ring-shaped cross section when viewed from above, a boss 15 is arranged at the lower end of the sampling tube 1, the outer diameter of the boss 15 is smaller than the outer diameter of the sampling tube 1, a drill bit 2 is fixedly connected to the lower end of the sampling tube 1, and a first cutting edge 3 for facilitating the drill bit 2 to cut into the soil is arranged at one end of the drill bit 2 away from the sampling tube 1. The sampling head is mainly used for sampling sticky planting soil. When in use, the driving unit drives the sampling tube 1 to insert into the soil layer, and when inserted, the soil layer is cut through the first cutting edge 3 at the lower end of the drill bit 2 to facilitate the insertion of the sampling tube 1;

[0030] like Figure 1 , Figure 7 As shown, in order to prevent the rotating sleeve 4 from rotating when the sampling tube 1 is inserted into the soil layer, a connecting rod 8 is fixedly connected to the top and the center position of the sampling tube 1, and the end of the connecting rod 8 away from the sampling tube 1 passes through the upper wall of the rotating sleeve 4 and the end of the connecting rod 8 away from the sampling tube 1 is provided with a connector 10, the rotating sleeve 4 and the connecting rod 8 are locked by a locking screw, and the outer wall of the rotating sleeve 4 is provided with a toggle hole 5 for convenient rotation of the rotating sleeve 4. When the sampling tube 1 is inserted into the soil layer, the rotating sleeve 4 and the connecting rod 8 are locked by the locking screw. At this time, the rotating sleeve 4 will not rotate, so that the cutting knife 13 will not rotate out, so as to avoid affecting the downward insertion action of the sampling tube 1. When the sampling tube 1 is inserted into place, the locking screw can be loosened, and a common wrench on the market can be inserted into the toggle hole 5 to toggle the rotating sleeve 4, and the rotating sleeve 4 is rotated to drive the cutting knife 13 to cut the soil sample;

[0031] like Figure 2 , Figure 5 , Figure 6 as well as Figure 7 As shown, in order to drive the rotating rod 12 to rotate when the rotating sleeve 4 rotates, the upper end of the sampling tube 1 is rotatably connected with the rotating sleeve 4, and one end of the three groups of rotating rods 12 passing through the upper end of the sampling tube 1 is extended into the rotating sleeve 4. A linkage structure is arranged between the one end of the three groups of rotating rods 12 extending into the rotating sleeve 4 and the inner wall of the rotating sleeve 4. The linkage structure includes a gear ring 19 and three groups of gears 18. The gear ring 19 is arranged on the inner wall of the rotating sleeve 4. The three groups of gears 18 are respectively fixedly connected to the one end of the three groups of rotating rods 12 extending into the rotating sleeve 4. The outer walls of the three groups of gears 18 are meshed with the inner wall of the gear ring 19. When the rotating sleeve 4 rotates, the gear 18 is driven to rotate through the meshing relationship between the gear ring 19 and the gear 18, and the gear 18 drives the rotating rod 12 to rotate;

[0032] like Figure 1 , Figure 2As shown, in order to facilitate cutting off the lower end of the soil sample from the soil layer, a step 16 is provided on the inner wall of the drill bit 2 and near the upper end, the outer wall of the boss 15 is fixedly connected to the inner wall of the step 16, and a receiving annular groove 11 is formed between the inner lower wall of the step 16 and the lower end of the boss 15. Three groups of rotating rods 12 are provided on the annular inner wall of the sampling tube 1. The upper and lower ends of the three groups of rotating rods 12 respectively penetrate the upper end of the sampling tube 1 and the lower end of the boss 15. One end of the three groups of rotating rods 12 penetrating the lower end of the boss 15 is extended into the receiving annular groove 11. A cutting knife structure for cutting off the sample is provided at one end of the three groups of rotating rods 12 extending into the receiving annular groove 11. The cutting knife structure includes three groups of cutting knives 13. The three groups of cutting knives 13 are respectively fixedly connected to one end of the three groups of rotating rods 12 extending into the receiving annular groove 11. The cutting knives 13 are arc-shaped when viewed from above, and the arc-shaped inner part of the cutting knives 13 is The arc is provided with a second blade 14, and the three groups of cutting knives 13 are distributed in sequence from top to bottom. After the sampling tube 1 is inserted into the soil layer, the soil inside the sampling tube 1 forms a sample. After the rotating sleeve 4 is rotated by a wrench, the rotating sleeve 4 drives the cutting knives 13 to rotate from the receiving ring groove 11 toward the soil sample through the gear ring 19, the gear 18 and the rotating rod 12. The cutting track formed by the simultaneous rotation of the three groups of cutting knives 13 completely covers the connection between the soil sample and the soil layer, so that the soil sample is separated from the soil layer. The three groups of cutting knives 13 rotate until the end away from the rotating rod 12 enters the receiving ring groove 11 again. At this time, when the sampling tube 1 is pulled out, the three groups of cutting knives 13 are located below the soil sample, which can prevent the soil sample from falling off downward. After pulling out, the rotating sleeve 4 is rotated in the opposite direction to drive the three groups of cutting knives 13 to reset, and the rotating sleeve 4 is locked again by the locking screw;

[0033] like Figure 1 , Figure 5 , Figure 6 as well as Figure 7 As shown, in order to push the soil sample out of the sampling tube 1 after the sampling is completed, a pushing structure for pushing the sample collected in the sampling tube 1 is arranged between the connecting rod 8 and the sampling tube 1, and the pushing structure includes a pushing rod 6, a toggle rod 7 and a pushing plate 17, the pushing plate 17 is slidably connected to the inner wall of the sampling tube 1, the pushing rod 6 is fixedly connected to the upper wall of the pushing plate 17, the connecting rod 8 is provided with circular holes distributed along its axial direction, the end of the pushing rod 6 away from the pushing plate 17 passes through the upper wall of the sampling tube 1 and extends into the circular hole of the connecting rod 8, the front wall and the rear wall of the connecting rod 8 are both provided with a giving way groove 9 which is connected with the circular hole, the toggle rod 7 is fixedly connected to the outer wall of the pushing rod 6 and is located at the end away from the pushing plate 17, the outer wall of the toggle rod 7 is slidably connected to the inner wall of the giving way groove 9, and a common sleeve on the market is inserted into the outer wall of the toggle rod 7, the pushing rod 6 can be driven to move downward by the toggle rod 7, and then the pushing plate 17 is driven to squeeze the soil sample downward until the soil sample is pushed out of the sampling tube 1;

[0034] The utility model also provides a sampling device, including a driving part and a sampling head as described in any one of the above items, the sampling head is connected to the driving part through a connecting rod 8, and the driving part is any one of a hand-pressed type, a foot-operated type or a mechanically driven type, and the purpose is to drive the sampling tube 1 to insert into the soil layer to form a soil sample inside the sampling tube 1.

[0035] Working principle: The sampling head is mainly used for sampling sticky planting soil. When in use, the driving part drives the sampling tube 1 to be inserted into the soil layer. When inserting, the soil layer is cut through the first cutting edge 3 at the lower end of the drill bit 2 to facilitate the insertion of the sampling tube 1. When the sampling tube 1 is inserted into the soil layer, the rotating sleeve 4 and the connecting rod 8 are locked by the locking screw. At this time, the rotating sleeve 4 will not rotate, so that the cutting knife 13 will not rotate out to avoid affecting the insertion action of the sampling tube 1. When the sampling tube 1 is inserted into place, the locking screw can be loosened, and the common wrench on the market can be inserted into the toggle hole 5 to toggle the rotating sleeve 4. The rotating sleeve 4 is rotated to drive the cutting knife 13 to cut the soil sample. When the rotating sleeve 4 rotates, the gear 18 is driven to rotate through the meshing relationship between the gear ring 19 and the gear 18, and the gear 18 drives the rotating rod 12 to rotate. After the sampling tube 1 is inserted into the soil layer, the soil inside the sampling tube 1 is formed into a sample. After the wrench turns the rotating sleeve 4 to rotate, the rotating sleeve 4 drives the cutting knife 13 to rotate from the receiving ring groove 11 toward the soil sample through the gear ring 19, the gear 18 and the rotating rod 12. The cutting track formed by the simultaneous rotation of the three groups of cutting knives 13 completely covers the connection between the soil sample and the soil layer, so that the soil sample is separated from the soil layer. The three groups of cutting knives 13 rotate until the end away from the rotating rod 12 enters the receiving ring groove 11 again. At this time, when the sampling tube 1 is pulled out, the three groups of cutting knives 13 are located below the soil sample, which can prevent the soil sample from falling off downward. After pulling out, the rotating sleeve 4 is rotated in the opposite direction to drive the three groups of cutting knives 13 to reset, and the rotating sleeve 4 is locked again by the locking screw. The common sleeve on the market is inserted into the outer wall of the toggle rod 7, and the toggle rod 7 can drive the push rod 6 to move downward, thereby driving the push plate 17 to squeeze the soil sample downward until the soil sample is pushed out of the sampling tube 1.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling head, characterized in that: The sampling tube (1) comprises a sampling tube (1), wherein the cross section of the sampling tube (1) is in the shape of a circular ring when viewed from above, a boss (15) is arranged at the lower end of the sampling tube (1), the outer diameter of the boss (15) is smaller than the outer diameter of the sampling tube (1), a drill bit (2) is fixedly connected to the lower end of the sampling tube (1), a step (16) is arranged on the inner wall of the drill bit (2) and close to the upper end, the outer wall of the boss (15) is fixedly connected to the inner wall of the step (16), a receiving annular groove (11) is formed between the inner lower wall of the step (16) and the lower end of the boss (15), and three groups of rotating rods (12) are arranged on the annular inner wall of the sampling tube (1), the upper and lower ends of the three groups of rotating rods (12) respectively penetrate the upper end of the sampling tube (1) and the lower end of the boss (15), and one end of the three groups of rotating rods (12) that penetrate the lower end of the boss (15) extends into the receiving annular groove (11). Inside, one end of the three groups of rotating rods (12) extending into the interior of the receiving ring groove (11) is provided with a cutting knife structure for cutting off the sample, the upper end of the sampling tube (1) is rotatably connected with a rotating sleeve (4), one end of the three groups of rotating rods (12) penetrating the upper end of the sampling tube (1) and extending into the interior of the rotating sleeve (4), a linkage structure is provided between the one end of the three groups of rotating rods (12) extending into the interior of the rotating sleeve (4) and the inner wall of the rotating sleeve (4), a connecting rod (8) is fixedly connected to the top and center position of the sampling tube (1), the end of the connecting rod (8) away from the sampling tube (1) penetrates the upper wall of the rotating sleeve (4) and the end of the connecting rod (8) away from the sampling tube (1) is provided with a connecting head (10), and a pushing structure for pushing out the sample collected into the sampling tube (1) is provided between the connecting rod (8) and the sampling tube (1).

2. A sampling head according to claim 1, characterized in that: The cutting knife structure comprises three groups of cutting knives (13), the three groups of cutting knives (13) are respectively fixedly connected to one end of the three groups of rotating rods (12) extending into the interior of the receiving ring groove (11), the cutting knives (13) are arc-shaped in top view projection, and the inner arc of the arc-shaped cutting knives (13) is provided with a second blade (14), and the three groups of cutting knives (13) are distributed in order from top to bottom.

3. A sampling head according to claim 2, characterized in that: The linkage structure comprises a gear ring (19) and three groups of gears (18); the gear ring (19) is arranged on the inner wall of the rotating sleeve (4); the three groups of gears (18) are respectively fixedly connected to one end of three groups of rotating rods (12) extending into the interior of the rotating sleeve (4); and the outer walls of the three groups of gears (18) are all meshed with the inner wall of the gear ring (19).

4. A sampling head according to claim 3, characterized in that: The pushing structure comprises a push rod (6), a toggle rod (7) and a push plate (17); the push plate (17) is slidably connected to the inner wall of the sampling tube (1); the push rod (6) is fixedly connected to the upper wall of the push plate (17); a circular hole distributed along the axial direction is arranged inside the connecting rod (8); the end of the push rod (6) away from the push plate (17) passes through the upper wall of the sampling tube (1) and extends into the circular hole of the connecting rod (8); the front wall and the rear wall of the connecting rod (8) are both provided with a clearance groove (9) that passes through the circular hole; the toggle rod (7) is fixedly connected to the outer wall of the push rod (6) and is located at the end away from the push plate (17); the outer wall of the toggle rod (7) is slidably connected to the inner wall of the clearance groove (9).

5. A sampling head according to claim 4, characterized in that: The end of the drill bit (2) away from the sampling tube (1) is provided with a first cutting edge (3) for facilitating the drill bit (2) to cut into the soil.

6. A sampling head according to claim 5, characterized in that: The rotating sleeve (4) and the connecting rod (8) are locked by means of a locking screw, and the outer wall of the rotating sleeve (4) is provided with a toggle hole (5) for facilitating the rotation of the rotating sleeve (4).

7. A sampling device, characterized in that: It comprises a driving part and a sampling head as claimed in any one of claims 1 to 6, wherein the sampling head is connected to the driving part via a connecting rod (8).

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