Automatic soil sampler and method for watermelon breeding

Abstract

The invention discloses an automatic soil sampler and method for watermelon breeding, comprising a bottom plate, five support rods are fixed on the top of the bottom plate, and a radially adjustable sampling mechanism for adjusting the soil sampling range is arranged between the tops of the five support rods; the radially adjustable sampling mechanism comprises a pentagonal sleeve fixed between the tops of the five support rods, and five movable rods are slidably connected to the inner surface of the pentagonal sleeve. The invention relates to the field of agricultural breeding technology. The automatic soil sampler and method for watermelon breeding realizes flexible adjustment of the radial position of the sampling tube through the arrangement of the radially adjustable sampling mechanism, and the motor drives the five sampling tubes to extend and expand outward when rotating forward, and drives the sampling tubes to contract when rotating reversely. The sampling position range of the sampling tube is controlled by the motor, and a larger range of soil samples can be sampled, and multiple samplings can be flexibly completed without frequently changing the sampling location, thereby improving the sampling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural breeding, and in particular to an automatic soil sampler and method for watermelon breeding. Background Art

[0002] In cantaloupe breeding, soil is the foundation for plant growth, and its quality has a decisive impact on the growth and development of cantaloupe, fruit quality, and breeding results. Comprehensive and accurate sampling and analysis of the soil in the planting area is an important way to obtain key information such as soil fertility, pH, and microbial communities, which can provide a strong basis for scientific fertilization, soil improvement, and variety adaptability assessment. However, the current soil sampling method in the cantaloupe breeding process has many defects that are difficult to ignore.

[0003] Existing soil sampling equipment has limited ability to adjust the sampling range. Most of them can only perform fixed-point sampling in smaller local areas. If a comprehensive assessment of a large area of ​​breeding fields is to be conducted, the equipment needs to be frequently moved and the sampling operation needs to be repeated at different locations, which is time-consuming and labor-intensive. Moreover, it is difficult for existing equipment to accurately control the sampling depth. The soil properties at different depths vary significantly. From the surface soil to the deep soil, the nutrient content, compactness and microbial environment are different. It is impossible to obtain soil samples at different depths on demand, which greatly limits the in-depth study of the vertical structure and characteristics of the soil and is not conducive to the formulation of targeted breeding plans. In addition, after the soil sampling is completed, the soil sample is easy to adhere to the inner wall of the sampling tube or container, and it is difficult to discharge it quickly and completely. In this regard, we proposed an automatic sampler and method for watermelon breeding soil to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic soil sampler and method for watermelon breeding, which solves the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic soil sampler and method for watermelon breeding, comprising a bottom plate, five support rods are fixed above the bottom plate, and a radial adjustment sampling mechanism for adjusting the soil sampling range is arranged between the top ends of the five support rods; The radial adjustment sampling mechanism includes a pentagonal sleeve fixed between the top ends of five support rods, the inner surface of the pentagonal sleeve is slidably connected with five moving rods, the tops of the five moving rods are fixed with limiting rods, the ends of the five moving rods that are away from each other are fixed with fixed seats, and a sampling tube is slidably connected in the fixed seat, a large gear 1 is provided on the top of the pentagonal sleeve, a triangular seat is fixed on the pentagonal sleeve, a motor is fixed to the bottom of the triangular seat, a small gear 1 is rotatably connected to the top of the triangular seat, the small gear 1 is meshed with the large gear 1, the motor drives the small gear 1 to rotate, the small gear 1 is meshed with the large gear 1, and five arc grooves are penetrated at the top of the large gear 1, the top ends of the five limiting rods penetrate the arc groove and extend to the outside of the arc groove, and the outer surface of the limiting rod is slidably connected to the inner surface of the arc groove.

[0006] Preferably, the inner surface of the sampling tube is slidably connected to a bulldozer plate, a vertical rod is fixed to the top of the bulldozer plate, a handle is fixed to the top of the vertical rod, a pedal plate is fixed on the sampling tube, a horizontal plate is fixed to one side of the fixed seat, and a spring is fixed between the top of the horizontal plate and the bottom of the pedal plate.

[0007] Preferably, a depth display assembly is provided between one side of the tread plate and one side of the cross plate, and the depth display assembly is used to display the depth of the sampling tube entering the soil for sampling, an indicator plate is fixed to one side of the tread plate, a connecting plate is fixed to one side of the cross plate, a scale plate is fixed to one side of the connecting plate, scale lines are engraved on the scale plate, and the indicator plate points to the scale lines.

[0008] Preferably, five vertical poles are fixed on the top of the pentagonal sleeve, and a circular plate is fixed between the top ends of the five vertical poles.

[0009] Preferably, a quick soil discharge assembly for quickly discharging soil in the sampling tube is provided between the top of the circular plate and the vertical rod, and the quick soil discharge assembly comprises a square plate fixed on the vertical rod.

[0010] Preferably, the top of the circular plate is rotatably connected to a large gear 2, and the top of the circular plate is also rotatably connected to a small gear 2, the small gear 2 is meshed with the large gear 2, the small gear 2 is fixed to the small gear 1 by a connecting shaft, five L-shaped plates are fixed to the top of the large gear 2, and the tops of the five L-shaped plates are all fixed with mounting tubes.

[0011] Preferably, a boss is slidably connected to the inner surface of the mounting tube, a second spring is fixed between the bottom of the boss and the bottom wall of the mounting tube, and the spherical surface of the boss is in contact and compression with one side of the square plate.

[0012] Preferably, a pressing rod is fixed to the top of the circular plate, a frame handle is fixed to the top of the pressing rod, the top of the pressing rod passes through the large gear two and extends to the outside of the large gear two, the outer surface of the pressing rod is rotatably connected to the inner surface of the large gear two, and five stabilizing nails are inserted into the top of the base plate, and the bottom ends of the five stabilizing nails all pass through the base plate and are inserted into the soil.

[0013] The present invention also discloses a sampling method of a muskmelon breeding soil automatic sampler, which specifically comprises the following steps: Step 1: Move the sampling device to the soil to be sampled, press the frame handle to insert the stabilizing nail into the soil, and further start the motor to drive the small gear 1 and the large gear 1 to rotate. When the large gear 1 rotates, it drives the five limit rods to slide in the arc groove, and at the same time, the five moving rods, the fixed seat, and the sampling tube expand radially outward; Step 2: After the sampling tube is adjusted to a suitable position, step on the pedal, which drives the sampling tube to slide downward and insert into the soil. At this time, the sampling depth of the sampling tube can be judged by observing the number on the scale line pointed to by the indicator plate. After the sampling is completed, release the pedal, and the sampling tube is driven to reset upward under the action of spring 1, thereby reversing the motor to radially shrink and reset the five sampling tubes. Step 3: During the reversal process, small gear 1 synchronously drives small gear 2 to rotate, which in turn drives large gear 2 to rotate, and large gear 2 drives five L-shaped plates to rotate, so that the spherical surface of the convex column contacts and squeezes one side of the square plate, and the convex column drives the square plate, vertical rod and bulldozer plate to move up. When the convex column separates from the square plate, the soil drives the bulldozer plate to move down under the action of gravity. After several reciprocating cycles, the bulldozer plate is used to reciprocate up and down to vibrate the soil, quickly separate the bulldozer plate from the soil, push the handle downward, and let the soil quickly discharge from the sampling tube. Beneficial Effects

[0014] The present invention provides an automatic soil sampler and method for watermelon breeding. Compared with the prior art, it has the following beneficial effects: (1) Through the setting of the radial adjustment sampling mechanism, the radial position of the sampling tube can be flexibly adjusted. When the motor rotates forward, it drives the five sampling tubes to extend outward, and when it rotates reversely, it drives the sampling tubes to contract. The sampling position range of the sampling tubes is controlled by the motor, and a larger range of soil samples can be sampled. Multiple samplings can be flexibly completed. Breeders do not need to frequently move heavy equipment or frequently change sampling locations, which improves sampling efficiency.

[0015] (2) Through the setting of the depth display component, after adjusting the sampling position, the sampling depth can be judged by stepping on the pedal and observing the indication on the indicator board pointing to the scale line, thereby achieving the purpose of controlling the sampling depth. At the same time, it also meets the needs of sampling soil at different depths, which helps to deeply analyze the impact of soil vertical structure on the growth and development of watermelon, and provide key data support for the formulation of scientific and targeted breeding programs.

[0016] (3) Through the setting of the rapid soil discharge component and the linkage with the radial adjustment sampling mechanism, the small gear 1 synchronously drives the small gear 2 and the large gear 2 to rotate, thereby driving the convex column to lift the square plate, the vertical rod and the bulldozer plate. Under the action of soil gravity, the bulldozer plate is driven to move downward and tends to separate from the bulldozer plate. After several cycles of reciprocating lifting, the bulldozer plate can vibrate the soil and quickly discharge the sampling tube, thereby realizing the rapid discharge of soil with high viscosity and ensuring the efficient and complete collection of watermelon breeding soil samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the external structure of the present invention; Figure 2 A three-dimensional diagram of the radially adjustable sampling mechanism of the present invention; Figure 3 It is an exploded view of the radial adjustment sampling mechanism of the present invention; Figure 4 It is a partial structural stereogram of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of the middle A; Figure 6 A three-dimensional diagram of a rapid soil discharge assembly of the present invention; Figure 7 It is a partial structural cross-sectional view of the present invention; Figure 8 It is a cross-sectional view of the sampling tube of the present invention.

[0018] In the figure: 1, bottom plate; 2, support rod; 3, radial adjustment sampling mechanism; 4, bulldozer; 5, vertical rod; 6, handle; 7, stepping plate; 8, horizontal plate; 9, spring 1; 10, depth display assembly; 11, vertical rod; 12, round plate; 13, fast soil discharge assembly; 14, pressing rod; 15, frame handle; 16, stabilizing nail; 31, pentagonal sleeve; 32, moving rod; 33, limit rod; 34, fixed seat; 3 5. Sampling tube; 36. Big gear one; 37. Triangular seat; 38. Motor; 39. Small gear one; 310. Arc slot; 101. Indicator plate; 102. Connecting plate; 103. Scale plate; 104. Scale line; 131. Square plate; 132. Big gear two; 133. Small gear two; 134. Connecting shaft; 135. L-shaped plate; 136. Mounting tube; 137. Boss; 138. Spring two. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides three technical solutions, including the following embodiments: Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 , a watermelon breeding soil automatic sampler and method, comprising a bottom plate 1, five stabilizing nails 16 are inserted on the top of the bottom plate 1, the bottom ends of the five stabilizing nails 16 all penetrate the bottom plate 1 and are inserted into the soil, the five stabilizing nails 16 are like solid anchor points, which can firmly fix the bottom plate 1 on the soil surface, provide a solid and reliable support force for the entire sampling device, and effectively avoid shaking or displacement of the device during the sampling process, which affects the sampling effect, five support rods 2 are fixed on the top of the bottom plate 1, and a radial adjustment sampling mechanism 3 for adjusting the soil sampling range is arranged between the top ends of the five support rods 2, the support rods 2 are arranged to provide support for the radial adjustment sampling mechanism 3, and the support rods 2 are stable brackets, which provide indispensable support for the radial adjustment sampling mechanism 3 to ensure its normal operation; The radially adjustable sampling mechanism 3 includes a pentagonal sleeve 31 fixed between the top ends of the five support rods 2. The center of the pentagonal sleeve 31 is a round box shape, and the surroundings are composed of five sleeves. The specific structure can be referred to in the attached manual. Figure 3The inner surface of the pentagonal sleeve 31 is slidably connected with five moving rods 32, and the tops of the five moving rods 32 are fixed with limit rods 33. The setting of the limit rods 33 can make the limit rods 33 rotate in the arc groove 310 when the large gear 36 rotates. Since the limit rods 33 and the moving rods 32 are fixedly connected, the rotation movement of the limit rods 33 will drive the five moving rods 32 to move outward or inward along the radial direction. The ends of the five moving rods 32 that are away from each other are fixed with fixed seats 34, and a sampling tube 35 is slidably connected in the fixed seat 34. The upper and lower ends of the sampling tube 35 are open. The sampling tube 35 is inserted downward into the soil, and the soil remains in the sampling tube 35. The sampling tube 35 pops out to realize the sampling operation of the soil. The top of the pentagonal sleeve 31 is provided with a large gear 36. 6. A triangular seat 37 is fixed on the pentagonal sleeve 31, and a motor 38 is fixed on the bottom of the triangular seat 37. The motor 38 is a three-phase asynchronous motor, which can be reversed, controlled by an external switch, and electrically connected to an external power supply. A pinion 39 is rotatably connected to the top of the triangular seat 37, and the pinion 39 is meshed with a large gear 36. The motor 38 drives the pinion 39 to rotate, and the output end of the motor 38 is fixed to the bottom of the pinion 39, and the pinion 39 is meshed with the large gear 36. Five arc grooves 310 are opened on the top of the large gear 36, and the tops of the five limit rods 33 all penetrate the arc groove 310 and extend to the outside of the arc groove 310, and the outer surface of the limit rod 33 maintains a good sliding connection with the inner surface of the arc groove 310 to ensure the smoothness of the movement.

[0021] Through the design of the radially adjustable sampling mechanism 3, the flexible adjustment of the radial position of the sampling tube 35 is successfully achieved. When the motor 38 rotates forward, it will drive the five sampling tubes 35 to extend and expand outward in the radial direction, thereby expanding the sampling range; when the motor 38 rotates reversely, it will drive the sampling tube 35 to contract. The staff only needs to control the operation of the motor 38 by operating the external switch to accurately control the sampling position range of the sampling tube 35. This design enables the device to sample a larger range of soil samples at one time and can flexibly complete multiple sampling operations. Breeders do not need to frequently move heavy equipment or frequently change sampling locations, which greatly improves the sampling efficiency.

[0022] The inner surface of the sampling tube 35 is slidably connected with a bulldozer plate 4, a vertical rod 5 is fixed on the top of the bulldozer plate 4, a handle 6 is fixed on the top of the vertical rod 5, and a pedal plate 7 is fixed on the sampling tube 35. In the actual sampling process, the staff only needs to step on the pedal plate 7 to drive the sampling tube 35 to slide downward with the help of its own gravity, and finally the sampling tube 35 is inserted into the soil for sampling. A horizontal plate 8 is fixed on one side of the fixed seat 34, and a spring 9 is fixed between the top of the horizontal plate 8 and the bottom of the pedal plate 7. The setting of the spring 9 can make the sampling tube 35 bounce back and reset, and the elastic force of the spring 9 is greater than the friction between the sampling tube 35 and the soil, thereby ensuring that the sampling tube 35 is smoothly reset.

[0023] Example 2: Based on Example 1, see Figure 4-Figure 5 As shown, a depth display assembly 10 is arranged between one side of the pedal board 7 and one side of the cross plate 8. The depth display assembly 10 is used to display the depth of the sampling tube 35 entering the soil for sampling. An indicator plate 101 is fixed to one side of the pedal board 7, a connecting plate 102 is fixed to one side of the cross plate 8, and a scale plate 103 is fixed to one side of the connecting plate 102. The scale plate 103 is engraved with scale lines 104, and the scale lines 104 represent the depth value. When the staff controls the sampling tube 35 to be inserted downward into the soil by stepping on the pedal board 7, the indicator plate 101 will move with the movement of the pedal board 7, and it will accurately point to the scale line 104 on the scale plate 103, wherein the scale value pointed to by the top of the indicator plate 101 is set to zero, and as the pedal board 7 is continuously pressed down, the scale value pointed to by the indicator plate 101 will gradually increase, indicating that the depth of the sampling tube 35 inserted into the soil is continuously increasing.

[0024] Through the setting of the depth display component 10, after adjusting the sampling position, the sampling depth can be judged by stepping on the pedal 7 and observing the indication of the indicator plate 101 pointing to the scale line 104, thereby achieving the purpose of controlling the sampling depth. At the same time, it also meets the needs of sampling soil at different depths, which is helpful for in-depth analysis of the impact of the vertical structure of the soil on the growth and development of watermelon, and provides key data support for the formulation of scientific and targeted breeding programs.

[0025] Five vertical poles 11 are fixed to the top of the pentagonal sleeve 31 , and a circular plate 12 is fixed between the top ends of the five vertical poles 11 . The circular plate 12 serves to further stabilize the structure and provide an installation foundation for subsequent components.

[0026] Example 3: Based on Example 2, see Figure 6-Figure 7 As shown, a quick soil discharge assembly 13 for quickly discharging soil in the sampling tube 35 is arranged between the top of the circular plate 12 and the vertical rod 5 . The quick soil discharge assembly 13 includes a square plate 131 fixed on the vertical rod 5 .

[0027] The top of the circular plate 12 is rotatably connected to a large gear 2 132, and the top of the circular plate 12 is also rotatably connected to a small gear 2 133. The small gear 2 133 meshes with the large gear 2 132, and the small gear 2 133 is fixed to the small gear 1 39 by a connecting shaft 134. The setting of the connecting shaft 134 can ensure that the small gear 2 133 and the small gear 1 39 rotate synchronously, and the connecting shaft 134 passes through the circular plate 12 and is rotatably connected to the inner surface of the circular plate 12. Five L-shaped plates 135 are fixed to the top of the large gear 2 132, and the tops of the five L-shaped plates 135 are all fixed with mounting tubes 136.

[0028] The inner surface of the mounting tube 136 is slidably connected with a boss 137, and the top of the boss 137 is a spherical surface. This design helps to better contact and squeeze with the square plate 131. A spring 138 is fixed between the bottom of the boss 137 and the bottom wall of the mounting tube 136. The spherical surface of the boss 137 contacts and squeezes one side of the square plate 131. When the spherical surface of the boss 137 contacts and squeezes one side of the square plate 131, the square plate 131 can be driven to move upward. Since the square plate 131 is fixedly connected to the vertical rod 5 and the bulldozer plate 4, the bulldozer plate 4 will be driven to move upward. At this time, the friction force of the side wall of the sampling tube 35 on the soil will slowly separate the bottom of the bulldozer plate 4 from the soil, and finally, in the process of the up and down reciprocating vibration of the bulldozer plate 4, the soil is completely separated and discharged.

[0029] Through the ingenious design of the rapid soil discharge component 13, it can be linked with the radial adjustment sampling mechanism 3. When the motor 38 drives the small gear 1 39 to rotate, the small gear 1 39 will synchronously drive the small gear 2 133 to rotate through the connecting shaft 134, and the small gear 2 133 will drive the large gear 2 132 to rotate. During the rotation of the large gear 2 132, the boss 137 will continuously lift the square plate 131, the vertical rod 5 and the bulldozer 4. Under the action of the soil's own gravity, the bulldozer 4 will tend to move downward and separate from the soil. After several times of repeated lifting, the bulldozer 4 can be continuously vibrated, so that the soil is shaken off the bulldozer 4 and quickly discharged from the sampling tube 35, thereby successfully realizing the function of quickly discharging the soil with high viscosity, ensuring the efficient and complete collection of watermelon breeding soil samples.

[0030] A pressing rod 14 is fixed to the top of the circular plate 12. When the stabilizing nail 16 needs to be pressed into the soil, the staff only needs to press the pressing rod 14 downward. A frame handle 15 is fixed to the top of the pressing rod 14. The design of the frame handle 15 is very user-friendly. It is convenient for the staff to carry the entire sampling device and move it between different sampling locations. The top of the pressing rod 14 passes through the large gear 132 and extends to the outside of the large gear 132. The outer surface of the pressing rod 14 is rotatably connected to the inner surface of the large gear 132.

[0031] Example 4: Based on Example 3, see Figure 1-Figure 8 As shown, The present invention also discloses a sampling method of a muskmelon breeding soil automatic sampler, which specifically comprises the following steps: Step 1: Move the sampling device to the soil to be sampled, press the frame handle 15, insert the stabilizing nail 16 into the soil, and further start the motor 38, so that the motor 38 drives the small gear 1 39 and the large gear 1 36 to rotate. When the large gear 1 36 rotates, it drives the five limit rods 33 to slide in the arc groove 310, and at the same time, the five moving rods 32, the fixing seat 34, and the sampling tube 35 expand radially outward; Step 2: After the sampling tube 35 is adjusted to a suitable position, the pedal 7 is stepped on, and the pedal 7 drives the sampling tube 35 to slide downward and insert into the soil. At this time, the sampling depth of the sampling tube 35 is judged by observing the indication on the scale line 104 pointed by the indicator plate 101. After the sampling is completed, the pedal 7 is released, and the sampling tube 35 is driven to reset upward under the action of the spring 9, thereby reversing the motor 38, so that the five sampling tubes 35 are radially contracted and reset; Step three, during the reversal process, small gear one 39 synchronously drives small gear two 133 to rotate, and then drives large gear two 132 to rotate, and then large gear two 132 drives five L-shaped plates 135 to rotate, so that the spherical surface of the boss 137 contacts and squeezes one side of the square plate 131, and then the boss 137 drives the square plate 131, the vertical rod 5, and the bulldozer 4 to move upward. When the boss 137 is separated from the square plate 131, the soil drives the bulldozer 4 to move downward under the action of gravity. After several reciprocating cycles, the bulldozer 4 is used to reciprocate up and down to vibrate the soil, so that the bulldozer 4 is quickly separated from the soil, the handle 6 is pushed downward, and the soil is quickly discharged from the sampling tube 35.

[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and cannot be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. An automatic soil sampler for watermelon breeding, comprising a bottom plate (1), characterized in that: Five support rods (2) are fixed above the bottom plate (1), and a radially adjustable sampling mechanism (3) for adjusting the soil sampling range is provided between the top ends of the five support rods (2); The radially adjustable sampling mechanism (3) comprises a pentagonal sleeve (31) fixed between the top ends of the five support rods (2); the inner surface of the pentagonal sleeve (31) is slidably connected to five moving rods (32); the tops of the five moving rods (32) are all fixed with limit rods (33); the ends of the five moving rods (32) that are away from each other are all fixed with fixed seats (34); a sampling tube (35) is slidably connected inside the fixed seat (34); a large gear (36) is provided on the top of the pentagonal sleeve (31); a triangular seat (37) is fixed on the pentagonal sleeve (31); the triangular seat (37) A motor (38) is fixed to the bottom of the triangular seat (37); a pinion gear (39) is rotatably connected to the top of the triangular seat (37); the pinion gear (39) is meshed with a large gear (36); the motor (38) drives the pinion gear (39) to rotate; the pinion gear (39) is meshed with a large gear (36); five arc grooves (310) are penetrated through the top of the large gear (36); the top ends of the five limit rods (33) penetrate the arc groove (310) and extend to the outside of the arc groove (310); and the outer surface of the limit rod (33) is slidably connected to the inner surface of the arc groove (310).

2. The automatic soil sampler for muskmelon breeding according to claim 1, characterized in that: The inner surface of the sampling tube (35) is slidably connected to a bulldozer (4), a vertical rod (5) is fixed to the top of the bulldozer (4), a handle (6) is fixed to the top of the vertical rod (5), a pedal plate (7) is fixed to the sampling tube (35), a horizontal plate (8) is fixed to one side of the fixing seat (34), and a spring (9) is fixed between the top of the horizontal plate (8) and the bottom of the pedal plate (7).

3. The automatic soil sampler for muskmelon breeding according to claim 2, characterized in that: A depth display assembly (10) is provided between one side of the tread plate (7) and one side of the transverse plate (8), and the depth display assembly (10) is used to display the depth of the sampling tube (35) entering the soil for sampling. An indicator plate (101) is fixed to one side of the tread plate (7), a connecting plate (102) is fixed to one side of the transverse plate (8), a scale plate (103) is fixed to one side of the connecting plate (102), a scale line (104) is engraved on the scale plate (103), and the indicator plate (101) points to the scale line (104).

4. The automatic soil sampler for muskmelon breeding according to claim 1, characterized in that: Five vertical poles (11) are fixed to the top of the pentagonal sleeve (31), and a circular plate (12) is fixed between the top ends of the five vertical poles (11).

5. The automatic soil sampler for muskmelon breeding according to claim 4, characterized in that: A quick soil discharge assembly (13) for quickly discharging soil in the sampling tube (35) is provided between the top of the circular plate (12) and the vertical rod (5). The quick soil discharge assembly (13) comprises a square plate (131) fixed on the vertical rod (5).

6. The automatic soil sampler for muskmelon breeding according to claim 5, characterized in that: The top of the circular plate (12) is rotatably connected to a large gear 2 (132), and the top of the circular plate (12) is also rotatably connected to a small gear 2 (133). The small gear 2 (133) is meshed with the large gear 2 (132), and the small gear 2 (133) is fixed to the small gear 1 (39) via a connecting shaft (134). Five L-shaped plates (135) are fixed to the top of the large gear 2 (132), and the tops of the five L-shaped plates (135) are all fixed with mounting tubes (136).

7. The automatic soil sampler for muskmelon breeding according to claim 6, characterized in that: The inner surface of the mounting tube (136) is slidably connected with a boss (137), a second spring (138) is fixed between the bottom of the boss (137) and the bottom wall of the mounting tube (136), and the spherical surface of the boss (137) is in contact and extrusion with one side of the square plate (131).

8. The automatic soil sampler for muskmelon breeding according to claim 6, characterized in that: A pressing rod (14) is fixed on the top of the circular plate (12), a frame handle (15) is fixed on the top of the pressing rod (14), the top end of the pressing rod (14) penetrates the large gear 2 (132) and extends to the outside of the large gear 2 (132), the outer surface of the pressing rod (14) is rotatably connected to the inner surface of the large gear 2 (132), and five stabilizing nails (16) are inserted on the top of the bottom plate (1), and the bottom ends of the five stabilizing nails (16) all penetrate the bottom plate (1) and are inserted into the soil.

9. A sampling method for a muskmelon breeding soil automatic sampler, characterized in that: The specific steps include: Step 1: Move the sampling device onto the soil to be sampled, press the frame handle (15) to insert the stabilizing pin (16) into the soil, and further start the motor (38) to drive the small gear 1 (39) and the large gear 1 (36) to rotate. When the large gear 1 (36) rotates, it drives the five limit rods (33) to slide in the arc groove (310), and at the same time, the five moving rods (32), the fixing seat (34), and the sampling tube (35) expand radially outward; Step 2: After the sampling tube (35) is adjusted to a suitable position, the pedal (7) is stepped on, and the pedal (7) drives the sampling tube (35) to slide downward and insert into the soil. At this time, the sampling depth of the sampling tube (35) is judged by observing the indication on the scale line (104) pointed by the indicator plate (101). After the sampling is completed, the pedal (7) is released, and the sampling tube (35) is driven to reset upward under the action of the spring 1 (9), thereby reversing the motor (38) to cause the five sampling tubes (35) to contract radially and reset. Step 3: During the reverse rotation, the small gear 1 (39) synchronously drives the small gear 2 (133) to rotate, thereby driving the large gear 2 (132) to rotate, and then the large gear 2 (132) drives the five L-shaped plates (135) to rotate, thereby causing the spherical surface of the convex column (137) to contact and squeeze one side of the square plate (131), and then the convex column (137) drives the square plate (131), the vertical rod (5), and the bulldozer (4) to move upward. When the convex column (137) is separated from the square plate (131), the soil drives the bulldozer (4) to move downward under the action of gravity. After several reciprocating cycles, the bulldozer (4) is used to reciprocate up and down to vibrate the soil, so that the bulldozer (4) is quickly separated from the soil, and the handle (6) is pushed downward to allow the soil to quickly discharge from the sampling tube (35).

Images