Soil humidity detection sampler for plant planting

Abstract

The invention relates to the technical field of soil sampling, in particular to a soil humidity detection sampler for plant planting, which comprises a holding rod and a sampling barrel, the sampling barrel is connected to the bottom end of the holding rod, the front side of the outer wall of the sampling barrel is provided with a storage box and a fixing assembly, the top of the inner wall of the sampling barrel is provided with a telescopic rod, and the outer wall of the telescopic rod is provided with an extension spring. A round pushing block is arranged at the bottom end of the sampling barrel, first sliding grooves and mounting grooves are formed in the left side and the right side of the sampling barrel, the mounting grooves are located below the first sliding grooves, and L-shaped limiting rods are arranged on the two sides of the round pushing block and penetrate through the first sliding grooves. The sampling tube is attached to the inner wall of the sampling barrel, and soil enters the sampling tube during sampling, so that soil samples are prevented from being mixed due to the fact that soil sampled last time is left on the inner wall of the sampling barrel during sampling; and the sampling pipe needing sampling for the second time is mounted, so that sampling for the next time is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a soil moisture detection sampler for plant planting. Background Art

[0002] When cultivating new varieties of crops, it is necessary to test the soil in the experimental field to confirm the humidity environment required for planting the new varieties. There are many humidity detection machines in the prior art. By inserting the sensor into the soil, the humidity of the soil can be detected. However, it is easily affected by the external environment during the detection process. Therefore, in order to ensure the accuracy of the data, the soil will be sampled and tested to obtain accurate humidity data. At the same time, the trace elements in the soil can also be tested. In order to ensure the accuracy of the data, it is necessary to take multiple samples of the same experimental field and different experimental fields separately to ensure the accuracy of the experiment. Therefore, the number of samplings is relatively large.

[0003] In the existing technology, when sampling, the sampling tube of the sampler is inserted into the soil, so that the soil enters the sampling tube, and then the soil is pushed out through the piston assembly inside the sampling tube to complete the sampling. However, after sampling, the inner wall of the sampling tube will retain the soil sampled last time, thereby causing the soil sample to be mixed, affecting the accuracy of the detection after soil sampling. In order to avoid the sample mixing during soil sampling, the existing technology replaces the sampling tube after sampling for the next sampling, such as a soil sampling device with publication number CN117825094A, through a detachable ring knife-container integrated structure, after one soil sampling, only the ring knife after collection needs to be saved, and the spare ring knife is replaced for the next soil sampling. And after the soil sampling is completed, it can be directly sealed without pushing out the soil sample to destroy the original soil structure.

[0004] However, when cultivating new crop varieties, multiple sampling is required, and the ring knife needs to be manually replaced after each sampling, which increases the workload of the samplers, the sampling time, and the cost is high.

[0005] Therefore, a soil moisture detection sampler for plant planting is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a soil moisture detection sampler for plant planting. In order to solve the problem that the soil sampled last time remains on the inner wall of the sampling tube, thereby causing the soil sample to be mixed during the sampling process and affecting the detection result, the sampling tube is sleeved on the inner wall of the sampling tube so that the sampled soil enters the sampling tube, thereby avoiding the residue on the inner wall of the sampling tube. At the same time, after the sampling is completed, the sampling tube is taken out and a new sampling tube is automatically sleeved, thereby reducing the installation time.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A soil moisture detection sampler for plant planting comprises a grip rod and a sampling barrel, wherein the sampling barrel is connected to the bottom end of the grip rod, a storage box and a fixing assembly are arranged on the front side of the outer wall of the sampling barrel, a telescopic rod is arranged on the top of the inner wall of the sampling barrel, a tension spring is arranged on the outer wall of the telescopic rod, and a circular push block is arranged on the bottom end, a first slide groove and an installation groove are arranged on the left and right sides of the sampling barrel, and the installation groove is located below the first slide groove, L-shaped limit rods are arranged on both sides of the circular push block and pass through the first slide groove, a rotating plate is arranged on the inner wall of the mounting groove, and the rotating plate is close to the first slide groove. The central axis end of the sampling barrel is inclined downward and is located above the fixed component. A plurality of sampling tubes are filled inside the storage box. A circular seat is provided on the top of the sampling tube, and the distance between the circular seat and the sampling tube is equal to the height of the rotating plate. The sampling tube is pushed into the sampling barrel from the storage box and is located between the rotating plate and the circular push block. The circular push block pushes the sampling tube below and causes the rotating plate to be clamped between the bottom of the circular seat and the top of the sampling tube. At the same time, the fixed component fixes the rotating plate, and the sampling tube pushes the sampling tube below out during the downward movement.

[0009] In the above scheme, the soil enters the sampling tube by fitting the sampling tube against the inner wall of the sampling tube, thereby avoiding soil residue on the inner wall of the sampling tube. At the same time, the first sampling tube is pushed out by the circular push block and the next sampling tube is installed, thus preparing for the next sampling.

[0010] Preferably, a cutting ring is connected to the bottom of the sampling tube, the cross-section of the cutting ring is set to a right triangle, and the hypotenuse is the inner wall side, the top of the cutting ring is connected to the bottom of the sampling tube, the outer wall of the sampling tube is fitted with the inner wall of the sampling tube, the bottom edge of the sampling tube is a hypotenuse, and the inclination angle of the bottom edge of the sampling tube is the same as the inclination angle of the bottom of the cutting ring.

[0011] In the above scheme, by setting the cross section of the cutting ring to a right triangle, it is more convenient for the sampling tube to cut into the soil, and the inner wall diameter of the cutting ring gradually increases from bottom to top, so that the sampled soil fits more closely with the inner wall of the sampling tube.

[0012] Preferably, the diameter of the circular seat is equal to the diameter of the outer wall of the sampling tube and equal to the width of the inner wall of the storage box. A connecting flap is inserted on the front side of the sampling tube. The length of the connecting flap is less than the length of the sampling tube and the width is half of the width of the sampling tube. A sealing edge is connected to the bottom of the connecting flap. A card slot is opened on the top of the sampling tube. The sealing edge cooperates with the card slot. The sampling tube and the top of the connecting flap are both connected with plug-in blocks, and the two plug-in blocks are plugged into the circular seat.

[0013] In the above scheme, the circular seat is separated from the plug-in block, thereby releasing the fixation between the sampling tube and the connecting flap, making it convenient to remove the soil inside the sampling tube.

[0014] Preferably, a push spring is connected to the front side of the inner wall of the storage box, a push plate is connected to the rear side of the push spring, the rear side of the push plate is set to be arc-shaped and fits with the outer wall of the sampling tube, and protruding edges are connected to the left and right sides of the inner wall of the storage box, and the protruding edges fit with the bottom of the circular seat.

[0015] In the above solution, the bottom of the circular seat is fitted with the protruding edge to prevent the sampling tube from being stuck in the storage box.

[0016] Preferably, a baffle is connected to the front side of the circular push block, the front side of the baffle is in contact with the inner wall of the sampling tube, and the length of the baffle is the same as that of the sampling tube.

[0017] In the above solution, the baffle plate is driven to move when the circular push block moves downward, thereby blocking the outlet of the storage box and preventing the sampling tube from being stuck inside the sampling cylinder.

[0018] Preferably, the inner wall of the sampling barrel is connected to an anti-impact component, and the anti-impact component includes an impact plate, a fixing rod and a buffer spring. The two buffer springs are connected to the rear side of the inner wall of the sampling barrel and are aligned with the middle of the sampling tube. The impact plate is connected to the front end of the buffer spring. The front side of the impact plate is set to an arc shape, and the length is less than the length of the sampling tube. The fixing rod is connected to the rear side of the impact plate, and the fixing rod extends through the sampling barrel to the outside. The length of the fixing rod is equal to the diameter of the inner wall of the sampling barrel.

[0019] In the above scheme, the impact plate is fitted with the sampling tube to reduce the impact when the sampling tube is filled.

[0020] Preferably, the fixing assembly includes a pedal and a fixing plate, the pedal is installed on the left and right sides of the outer wall of the sampling barrel and is located below the rotating plate, a fixing groove is provided on the top of the pedal, the inner wall of the fixing groove is in contact with the outer wall of the rotating plate, the fixing plate is slidably connected to the inner wall of the fixing groove, a return spring is connected between the fixing plate and the inner wall of the fixing groove, the cross section of the fixing plate is set to a right-angled trapezoid, and the side close to the sampling barrel is set to a hypotenuse, a linkage assembly is connected to the front side of the outer wall of the sampling barrel and is located above the pedal, the linkage assembly is connected to the fixing plate by a steel wire, the linkage assembly includes a fixing block, a lower push rod, an upper push rod, a triangular block, and a cross plate, the fixing block is connected to the rear side of the outer wall of the sampling barrel, and the top of the fixing block is provided with a A through hole, a limited position cavity is provided inside the fixed block, the limited position cavity is coaxial with the through hole, the lower push rod is connected to the through hole, the outer wall of the lower push rod is connected to the limited position block and is located inside the limited position cavity, the upper push rod is hinged at the top of the lower push rod, the two triangular blocks are respectively connected to the front side of the upper push rod and the rear side of the outer wall of the sampling tube, and the two triangular blocks are inverted with each other, and a second slide groove is provided on the rear side of the outer wall of the sampling tube, and a protrusion is connected to the rear side of the circular push block, the cross section of the protrusion is set as a right triangle, and the top of the protrusion is set as an oblique edge, the cross plate is connected to the top of the upper push rod, and passes through the second slide groove to fit the bottom of the protrusion, pulleys are connected on the left and right sides of the fixed block, and the steel wire passes through the pulley and is connected to the bottom of the lower push rod.

[0021] In the above scheme, the rotating plate is fixed by the fixing component to prevent the sampling tube from falling off during sampling, and the locking of the rotating plate by the fixing component is released by the linkage component.

[0022] Preferably, the connection point between the rotating plate and the mounting groove is N, and the distances between the connection point N and two ends of the rotating plate are M and L respectively, and M is smaller than L.

[0023] In the above scheme, the force arm formed by the sampling tube and the rotating plate is smaller than the force arm formed by the fixed plate and the rotating plate, thereby reducing the bending force generated by the reaction force of the sampling tube on the rotating plate during sampling.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The sampling tube is fitted with the inner wall of the sampling cylinder, and the soil enters the sampling tube during sampling, so as to avoid the soil from the last sampling remaining on the inner wall of the sampling cylinder during sampling, causing the soil sample to be mixed. When the sampling is completed, the sampling tube for the first sampling is pushed out by the circular push block, and the sampling tube for the second sampling is installed to facilitate the next sampling, save installation time, and improve sampling efficiency.

[0026] 2. The impact plate fits the outer wall of the sampling tube to avoid the impact force when the sampling tube is pushed into the sampling tube. At the same time, when the sampling tube enters the inner wall of the sampling tube, the impact plate fixes and positions the sampling tube through the squeezing force of the sampling tube, thereby preventing the second sampling tube from shaking on the inner wall of the sampling tube and causing itself to be damaged by impact. At the same time, it also prevents the soil inside the first sampling tube from being impacted and falling off, affecting the sampling efficiency.

[0027] 3. The rotating plate is fixed in the fixing groove on the top of the pedal by the fixing plate, so that the rotation of the rotating plate is limited and the sampling tube is fixed, thereby preventing the sampling tube from falling off during the sampling process and improving the sampling efficiency. At the same time, the contact area between the fixing groove and the rotating plate is larger than half of the overall area of ​​the rotating plate, thereby reducing the bending force of the rotating plate caused by the reaction force of the sampling tube during the sampling process, reducing the deformation of the rotating plate, thereby increasing the service life and improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the front side cross-sectional structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the sampling tube structure of the present invention;

[0031] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of part B;

[0032] Figure 5 It is a side cross-sectional structural schematic diagram of the present invention;

[0033] Figure 6 For the present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0034] Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of the middle C part;

[0035] Figure 8 For the present invention Figure 5 A schematic diagram of the enlarged structure of the D part;

[0036] Fig. 9 This is a schematic diagram of the structure of the sampling tube of the present invention before being fixed;

[0037] Fig.10 This is a schematic diagram of the structure of the sampling tube after being fixed according to the present invention.

[0038] In the figure: 1, grip; 2, sampling tube; 201, first slide; 202, mounting groove; 203, cutting ring; 204, second slide; 3, storage box; 301, push spring; 302, push plate; 303, protruding edge; 4, fixing assembly; 401, pedal; 4011, fixing groove; 402, fixing plate; 4021, steel wire; 403, reset spring; 5, telescopic rod; 6, round push block; 601, limit rod; 602, baffle; 603, protrusion; 7, tension spring; 8, rotating plate ; 9. Sampling tube; 901. Round seat; 902. Connecting flap; 9021. Sealing edge; 9022. Plug-in block; 903. Card slot; 10. Anti-impact assembly; 1001. Impact plate; 1002. Fixed rod; 1003. Buffer spring; 11. Linkage assembly; 1101. Fixed block; 11011. Through hole; 11012. Limiting cavity; 1102. Lower push rod; 11021. Limiting block; 1103. Upper push rod; 1104. Triangular block; 1105. Cross plate; 12. Pulley. DETAILED DESCRIPTION

[0039] 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, and combine the working state to make its structural features more detailed. 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 making creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 10 The present invention provides a soil moisture detection sampler for plant planting, and the technical scheme is as follows:

[0041] A soil moisture detection sampler for plant planting, referring to Figure 1 , Figure 2 , Fig. 9 and Fig.10, comprising a grip 1 and a sampling tube 2, the sampling tube 2 being connected to the bottom end of the grip 1, a storage box 3 and a fixing assembly 4 being provided on the front side of the outer wall of the sampling tube 2, a telescopic rod 5 being provided on the top of the inner wall of the sampling tube 2, the outer wall of the telescopic rod 5 being provided with a tension spring 7, and a circular push block 6 being provided on the bottom end, a first slide groove 201 and a mounting groove 202 being provided on both sides of the sampling tube 2, and the mounting groove 202 being located below the first slide groove 201, L-shaped limiting rods 601 being provided on both sides of the circular push block 6 and passing through the first slide groove (201), the first sampling tube 9 being pushed downward by stepping on the limiting rod 601 with a foot, and being reset by the tension spring 7 at the end of pushing, a rotating plate 8 being provided on the inner wall of the mounting groove 202, the rotating plate 8 being installed inside the mounting groove 202 by a torsion spring, and the torsion of the torsion spring being greater than that of the sampling tube 9 The rotating plate 8 is inclined downward near the central axis end of the sampling tube 2 and is located above the fixing component 4. The storage box 3 is filled with multiple sampling tubes 9. A circular seat 901 is provided on the top of the sampling tube 9. The distance between the circular seat 901 and the sampling tube 9 is equal to the height of the rotating plate 8. The sampling tube 9 is pushed into the sampling tube 2 from the storage box 3 and is located between the rotating plate 8 and the circular pushing block 6. The circular pushing block 6 pushes the sampling tube 9 below and makes the rotating plate 8 stuck between the bottom of the circular seat 901 and the top of the sampling tube 9. At the same time, the fixing component 4 fixes the rotating plate 8. The sampling tube 9 pushes the sampling tube 9 below during the downward movement. When the sampling is completed, the gravity of the sampling tube 9 and the soil inside it is greater than the gravity of the torsion spring, so that when the fixing of the rotating plate 8 is released, the sampling tube 9 can fall off by itself.

[0042] As an embodiment of the present invention, refer to Figure 2 and Figure 3 The bottom of the sampling tube 2 is connected with a cutting ring 203, and the cross section of the cutting ring 203 is set to a right triangle, so as to reduce the contact area with the ground and increase the stress during cutting, and the hypotenuse is the inner wall side, so that the diameter of the cut soil column is larger than the inner wall diameter of the sampling tube 9, so that the soil column will be compacted when entering the inner wall of the sampling tube 9, and fit closely with the inner wall of the sampling tube 9, so as to avoid the soil column falling off from the inner wall of the sampling tube 9 during sampling, and the top of the cutting ring 203 is connected with the bottom of the sampling tube 9, so that the sampled soil column passes through the cutting ring 203 and directly enters the interior of the sampling tube 9, so as to avoid the soil sticking to the inner wall of the sampling tube 2, and the outer wall of the sampling tube 9 fits with the inner wall of the sampling tube 2, and the bottom edge of the sampling tube 9 is a hypotenuse, and the bottom edge of the sampling tube 9 is a hypotenuse, and the inclination angle of the hypotenuse is the same as the inclination angle of the bottom of the cutting ring 203, so that the soil column enters the inner wall of the sampling tube 9 more smoothly.

[0043] As an embodiment of the present invention, refer to Figure 2 and Figure 3The diameter of the circular seat 901 is equal to the outer wall diameter of the sampling tube 9 and equal to the inner wall width of the storage box 3, so that the annular groove formed by the top of the sampling tube 9 and the circular seat 901 can better engage with the rotating plate 8, and at the same time avoid the end-to-end connection of the sampling tube 9. The front side of the sampling tube 9 is plugged with a connecting flap 902, the length of the connecting flap 902 is less than the length of the sampling tube 9, and the width is half the width of the sampling tube 9. The bottom of the connecting flap 902 is connected to a sealing edge 9021, and a card slot 903 is opened at the top of the sampling tube 9. The sealing edge 9021 is matched with the card slot 903. The sampling tube 9 and the top of the connecting flap 902 are both connected with a plug-in block 9022, and the two plug-in blocks 9022 are plugged into the circular seat 901. When the sampling is completed, the circular seat 901 is removed from the plug-in block 9022 to release the fixation between the sampling tube 9 and the connecting flap 902, so as to facilitate the removal of the soil inside the sampling tube 9. After the removal, the sealing edge 9021 is inserted into the card slot 903, and the two plug-in blocks 9022 are fitted together. Finally, the circular seat 901 is plugged into the outer wall of the plug-in block 9022 to fix the sampling tube 9 and the connecting flap 902.

[0044] As an embodiment of the present invention, refer to Figure 5 A push spring 301 is connected to the front side of the inner wall of the storage box 3, and a push plate 302 is connected to the rear side of the push spring 301. The rear side of the push plate 302 is set to an arc shape and fits with the outer wall of the sampling tube 9. The left and right sides of the inner wall of the storage box 3 are connected with protruding edges 303, and the protruding edges 303 fit with the bottom of the circular seat 901. When the push plate 302 pushes the sampling tube 9 to move, the protruding edges 303 and the circular seat 901 are engaged with the annular groove formed by the sampling tube 9, thereby preventing the sampling tube 9 from tipping over when moving inside the storage box 3 and causing the sampling tube 9 to be stuck inside the storage box 3.

[0045] As an embodiment of the present invention, refer to Figure 5The inner wall of the sampling barrel 2 is connected to an anti-impact component 10, and the anti-impact component 10 includes an impact plate 1001, a fixing rod 1002 and a buffer spring 1003. The two buffer springs 1003 are connected to the rear side of the inner wall of the sampling barrel 2 and are aligned with the middle of the sampling tube 9. The impact plate 1001 is connected to the front end of the buffer spring 1003. The front side of the impact plate 1001 is set to an arc shape, and the length is less than the length of the sampling tube 9, so that the impact plate 1001 can contact the sampling barrel 2 inside the storage box 3 before the circular push block 6 is completely reset. The fixing rod 1002 is connected to the rear side of the impact plate 1001, and the fixing rod 1002 extends through the sampling barrel 2 to the outside. The length of the fixing rod 1002 is equal to the inner wall diameter of the sampling barrel 2. The fixing rod 1002 is used as the impact plate 100 1, when the circular push block 6 moves upward for a certain distance, the impact plate 1001 fits with the outer wall of the sampling tube 9 under the thrust of the buffer spring 1003, and when the circular push block 6 is completely reset, since the elastic force of the buffer spring 1003 is less than the elastic force of the push spring 301, the sampling tube 9 is pushed into the sampling barrel 2 together with the buffer spring 1003 under the push of the push spring 301, thereby reducing the impact force when the sampling tube 9 enters the inner wall of the sampling barrel 2, and the front side of the circular push block 6 is connected to a baffle 602, the front side of the baffle 602 fits with the inner wall of the sampling barrel 2, and the length is the same as that of the sampling tube 9, when the circular push block 6 pushes the sampling tube 9 downward to move, the baffle 602 blocks the outlet of the storage box 3, thereby preventing the sampling tube 9 from being ejected from the storage magazine in advance, causing the sampling tube 9 to be stuck in the sampling barrel 2.

[0046] As an embodiment of the present invention, refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The fixing assembly 4 includes a pedal 401 and a fixing plate 402. The pedal 401 is installed on the left and right sides of the outer wall of the sampling tube 2 and is located below the rotating plate 8. A fixing groove 4011 is opened on the top of the pedal 401. The inner wall of the fixing groove 4011 is in contact with the outer wall of the rotating plate 8. The fixing plate 402 is slidably connected to the inner wall of the fixing groove 4011. A return spring 403 is connected between the fixing plate 402 and the inner wall of the fixing groove 4011. The cross section of the fixing plate 402 is set to a right-angle trapezoid, and the side close to the sampling tube 2 is set to a hypotenuse. The front side of the outer wall of the sampling tube 2 is connected to the linkage assembly 11 and is located above the pedal 401. The linkage assembly 11 is connected to the outer wall of the sampling tube 2. The rotating plate 8 is connected to the fixed plate 402 through the steel wire 4021. The rotating plate 8 is pushed by the limit rod 601 to first contact the bevel on the top of the fixed plate 402 and push the fixed plate 402 to move away from the sampling tube 2. Then the rotating plate 8 fits with the inner wall of the fixed groove 4011. When the rotating plate 8 fits with the fixed groove 4011, the rotating plate 8 is located below the fixed plate 402. The fixed plate 402 moves to the top of the rotating plate 8 under the push of the reset spring 403, thereby fixing the rotating plate 8. After being fixed, the rotating plate 8 cannot rotate. At this time, the rotating plate 8 is located at the inner end of the sampling tube 2 and engages with the annular groove formed by the top of the sampling tube 9 and the circular seat 901, thereby fixing the sampling tube 9.

[0047] The linkage assembly 11 includes a fixed block 1101, a lower push rod 1102, an upper push rod 1103, a triangular block 1104, and a horizontal plate 1105. The fixed block 1101 is connected to the rear side of the outer wall of the sampling tube 2. A through hole 11011 is provided on the top of the fixed block 1101. A limited cavity 11012 is provided inside the fixed block 1101. The limited cavity 11012 is coaxial with the through hole 11011. The lower push rod 1102 is connected to the inside of the through hole 11011. The outer wall of 1102 is connected to the limiting block 11021 and is located inside the limiting cavity 11012. The upper push rod 1103 is hinged to the top of the lower push rod 1102 through a torsion spring. The two triangular blocks 1104 are respectively connected to the front side of the upper push rod 1103 and the rear side of the outer wall of the sampling tube 2, and the two triangular blocks 1104 are reversed with each other. The rear side of the outer wall of the sampling tube 2 is provided with a second slide groove 204. The rear side of the circular push block 6 is connected to a protrusion 603, and the cross section of the protrusion 603 is set as a right triangle. The top of the protrusion 603 is set as an inclined edge. When the circular push block 6 is reset and drives the protrusion 603 to move upward, the inclined edge of the protrusion 603 fits with the bottom wall of the horizontal plate 1105, and pushes the upper push rod 1103 to rotate and drive the horizontal plate 1105 to separate from the protrusion 603. Then the upper push rod 1103 is reset under the torsion of the torsion spring. At this time, the horizontal plate 1105 is located below the protrusion 603. The horizontal plate 1105 is connected to the top of the upper push rod 1103, and passes through the second slide groove 204 to fit with the bottom of the protrusion 603. Pulleys 12 are connected to the left and right sides of the fixed block 1101, and the steel wire 4021 passes through the pulley 12 and is connected to the bottom of the lower push rod 1102. The circular push block 6 moves downward, which drives the protrusion 603 to move downward. The protrusion 603 pushes the cross plate 1105 to move downward to drive the upper push rod 1103 and the lower push rod 1102 to move downward. When the lower push rod 1102 moves downward, the steel wire 4021 is pulled to move the fixed plate 402 away from the central axis of the sampling tube 2, thereby releasing the fixation of the rotating plate 8.

[0048] As an embodiment of the present invention, refer to Figure 4 The connection point between the rotating plate 8 and the mounting groove 202 is N, and the distances between the connection point N and the two ends of the rotating plate 8 are M and L respectively. M is smaller than L, so that the force arm formed by the force of the limit rod 601 and the fixed plate 402 acting on the rotating plate 8 is greater than the force arm formed by the sampling tube 9 and the rotating plate 8, thereby saving effort when fixing the rotating plate 8 and reducing the bending force generated by the reaction force on the rotating plate 8 during sampling.

[0049] Working principle: In order to prevent the inner wall of the sampling tube 2 from being contaminated, sampling is performed by sleeve-fitting the sampling tube 9 on the inner wall of the sampling tube 9. First, the storage box 3 is installed on the front side of the outer wall of the sampling tube 2. The sampling tube 9 is pushed into the sampling tube 2 by the pushing plate 302 and stays on the top of the rotating plate 8. Then, the circular pushing block 6 is pushed to push the sampling tube 9 downward, so that the rotating plate 8 is stuck in the gap between the bottom of the circular seat 901 and the top of the sampling tube 9, thereby completing the installation of the first sampling tube 9. In order to prevent the sampling tube 9 from falling off during sampling, the rotating plate 8 is limited to rotate by the fixing component 4, thereby fixing the sampling tube 9.

[0050] After the sampling tube 9 is installed for the first time, the circular push block 6 is reset, and the second sampling tube 9 is pushed out of the storage box 3 and stays above the first sampling tube 9 .

[0051] When sampling is completed, the circular push block 6 is pushed. During the downward movement, the circular push block 6 is first connected to the linkage component 11 and starts the fixing component 4 to release the fixation of the rotating plate 8, thereby releasing the fixation of the sampling tube 9. When continuing to move downward, the first sampling tube 9 is pushed out through the second sampling tube 9, and the second sampling tube 9 is installed on the inner wall of the sampling cylinder 2 and connected to the rotating plate 8.

[0052] During the fixing process, the limiting rod 601 pushes the rotating plate 8 to rotate away from the central axis end of the sampling tube 2 and contact the beveled edge of the top of the fixed plate 402 in the fixing assembly 4. When the rotating plate 8 contacts the beveled edge of the top of the fixed plate 402, it pushes the fixed plate 402 to move away from the central axis of the sampling tube 2 and engage with the fixing groove 4011 at the top of the pedal 401. After engaging with the fixing groove 4011, the fixed plate 402 moves to the top of the rotating plate 8 under the push of the return spring 403, and fixes the rotating plate 8 inside the fixing groove 4011.

[0053] During the process of releasing the fixing, when the circular push block 6 is pushed downward for the second time, the circular push block 6 moves downward and drives the protrusion 603 to move downward. When the protrusion 603 moves downward, the upper push rod 1103 and the lower push rod 1102 move downward by pushing the horizontal plate 1105. When the lower push rod 1102 moves downward, the fixed plate 402 is pulled away from the central axis of the sampling tube 2 through the steel wire 4021, thereby releasing the fixing of the rotating plate 8. At this time, the rotating plate 8 is reset under the torsion of the torsion spring. When the upper push rod 11 When 03 continues to move downward, it drives the triangular block 1104 on the front side of the upper push rod 1103 to move and contact with the triangular block 1104 on the rear side of the sampling tube 2. Through the contact of the two triangular blocks 1104 inclined surfaces, the upper push rod 1103 is pushed to rotate away from the sampling tube 2, and the cross plate 1105 is driven to separate from the protrusion 603. After separation, the fixed plate 402 is reset under the action of the reset spring 403, and the upper push rod 1103 and the lower push rod 1102 are pulled back through the steel wire 4021 to prepare for the next release of the fixation.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil moisture detection sampler for plant planting, comprising a handle (1), characterized in that: The sampling barrel (2) is also provided with a sampling barrel (2), wherein the sampling barrel (2) is connected to the bottom end of the gripping rod (1), a storage box (3) and a fixing assembly (4) are provided on the front side of the outer wall of the sampling barrel (2), a telescopic rod (5) is provided on the top of the inner wall of the sampling barrel (2), the outer wall of the telescopic rod (5) is provided with a tension spring (7), and a circular push block (6) is provided on the bottom end, a first slide groove (201) and an installation groove (202) are provided on both sides of the sampling barrel (2), and the installation groove (202) is located below the first slide groove (201), L-shaped limit rods (601) are provided on both sides of the circular push block (6), and a rotating plate (8) is provided on the inner wall of the installation groove (202), and the rotating plate (8) is inclined downward near the central axis end of the sampling barrel (2). , and is located above the fixed component (4). The storage box (3) is filled with a plurality of sampling tubes (9). A circular seat (901) is provided on the top of the sampling tube (9). The distance between the circular seat (901) and the sampling tube (9) is equal to the height of the rotating plate (8). The sampling tube (9) is pushed from the storage box (3) into the sampling cylinder (2) and is located between the rotating plate (8) and the circular push block (6). The circular push block (6) pushes the sampling tube (9) below and makes the rotating plate (8) stuck between the bottom of the circular seat (901) and the top of the sampling tube (9). At the same time, the fixed component (4) fixes the rotating plate (8). When the sampling tube (9) is pushed downward, it pushes out the sampling tube (9) below.

2. A soil moisture detection sampler for plant planting according to claim 1, characterized in that: The bottom of the sampling tube (2) is connected to a cutting ring (203), the cross section of the cutting ring (203) is set to be a right triangle, with the hypotenuse as the inner wall side, and the top of the cutting ring (203) is connected to the bottom of the sampling tube (9).

3. A soil moisture detection sampler for plant planting according to claim 2, characterized in that: The diameter of the circular seat (901) is equal to the diameter of the outer wall of the sampling tube (9) and is equal to the width of the inner wall of the storage box (3). A connecting flap (902) is plugged into the front side of the sampling tube (9). The length of the connecting flap (902) is less than the length of the sampling tube (9) and the width is half the width of the sampling tube (9). The bottom of the connecting flap (902) is connected to a sealing edge (9021). A card slot (903) is provided at the top of the sampling tube (9). The sealing edge (9021) cooperates with the card slot (903). The sampling tube (9) and the top of the connecting flap (902) are both connected to plug-in blocks (9022). The two plug-in blocks (9022) are plugged into the circular seat (901).

4. A soil moisture detection sampler for plant planting according to claim 3, characterized in that: The outer wall of the sampling tube (9) is in contact with the inner wall of the sampling cylinder (2); the bottom edge of the sampling tube (9) is a bevel, and the bevel angle of the bottom edge of the sampling tube (9) is the same as the inclination angle of the bottom of the cutting ring (203).

5. The soil moisture detection sampler for plant planting according to claim 1, characterized in that: The front side of the inner wall of the storage box (3) is connected to a push spring (301), and the rear side of the push spring (301) is connected to a push plate (302). The rear side of the push plate (302) is designed to be arc-shaped and fits with the outer wall of the sampling tube (9). The left and right sides of the inner wall of the storage box (3) are connected to protruding edges (303), and the protruding edges (303) fit with the bottom of the circular seat (901).

6. The soil moisture detection sampler for plant planting according to claim 1, characterized in that: The front side of the circular push block (6) is connected to a baffle (602), the front side of the baffle (602) is in contact with the inner wall of the sampling cylinder (2), and the length of the baffle (602) is the same as that of the sampling tube (9).

7. The soil moisture detection sampler for plant planting according to claim 2, characterized in that: The inner wall of the sampling tube (2) is connected to an anti-impact component (10), and the anti-impact component (10) comprises an impact plate (1001), a fixing rod (1002) and a buffer spring (1003). The two buffer springs (1003) are connected to the rear side of the inner wall of the sampling tube (2) and are aligned with the middle of the sampling tube (9). The impact plate (1001) is connected to the front end of the buffer spring (1003). The front side of the impact plate (1001) is set to be arc-shaped, and the length is less than the length of the sampling tube (9). The fixing rod (1002) is connected to the rear side of the impact plate (1001). The fixing rod (1002) passes through the sampling tube (2) and extends to the outside. The length of the fixing rod (1002) is equal to the diameter of the inner wall of the sampling tube (2).

8. The soil moisture detection sampler for plant planting according to claim 1, characterized in that: The fixing assembly (4) comprises a pedal (401) and a fixing plate (402). The pedal (401) is installed on the left and right sides of the outer wall of the sampling tube (2) and is located below the rotating plate (8). A fixing groove (4011) is provided on the top of the pedal (401). The inner wall of the fixing groove (4011) is in contact with the outer wall of the rotating plate (8). The fixing plate (402) is slidably connected to the inner wall of the fixing groove (4011). A return spring (403) is connected between the fixing plate (402) and the inner wall of the fixing groove (4011). The cross section of the fixing plate (402) is set to be a right-angled trapezoid. The side close to the sampling tube (2) is set as a bevel. The front side of the outer wall of the sampling tube (2) is connected with a linkage assembly (11) and is located above the pedal (401). The linkage assembly (11) is connected to the fixed plate (402) through a steel wire (4021). The linkage assembly (11) comprises a fixed block (1101), a lower push rod (1102), an upper push rod (1103), a triangular block (1104), and a horizontal plate (1105). The fixed block (1101) is connected to the rear side of the outer wall of the sampling tube (2). A through hole (11011) is opened on the top of the fixed block (1101). A limiting cavity (11012) is provided inside the fixed block (1101), the limiting cavity (11012) is coaxial with the through hole (11011), the lower push rod (1102) is connected to the through hole (11011), the outer wall of the lower push rod (1102) is connected to the limiting block (11021) and is located inside the limiting cavity (11012), the upper push rod (1103) is hinged to the top of the lower push rod (1102), the two triangular blocks (1104) are respectively connected to the front side of the upper push rod (1103) and the rear side of the outer wall of the sampling tube (2), and the two triangular blocks (1104) are connected to the upper push rod (1103) and the rear side of the outer wall of the sampling tube (2). 04) are inverted with each other, a second slide groove (204) is provided on the rear side of the outer wall of the sampling tube (2), a protrusion (603) is connected to the rear side of the circular push block (6), the cross section of the protrusion (603) is set as a right triangle, and the top of the protrusion (603) is set as an inclined edge, the cross plate (1105) is connected to the top of the upper push rod (1103), and passes through the second slide groove (204) to fit with the bottom of the protrusion (603), the left and right sides of the fixed block (1101) are connected with pulleys (12), and the steel wire (4021) passes through the pulley (12) and is connected to the bottom of the lower push rod (1102).

9. The soil moisture detection sampler for plant planting according to claim 8, characterized in that: The connection point between the rotating plate (8) and the mounting groove (202) is N, and the distances between the connection point N and the two ends of the rotating plate (8) are M and L respectively, and M is smaller than L.

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