PH value measuring device for evaluating carbon sequestration capacity of soil and use method of PH value measuring device

Abstract

The invention relates to the technical field of soil PH value detection, in particular to a PH value measuring device for evaluating the carbon sequestration capacity of soil and a using method.The PH value measuring device comprises a sampling pipe, a probe and a base, a mounting frame is arranged on the base, a roller lifting mechanism is mounted on the mounting frame, and the sampling pipe is matched with the roller lifting mechanism in a driving mode; a detection inlet matched with the probe is formed in one side of the sampling pipe, a transverse driving mechanism and a motor are installed on the base, a lantern ring is arranged on the transverse driving mechanism, the probe is in sliding connection with the lantern ring in a penetrating mode, an elastic clamping block is arranged on the outer surface of the lantern ring, a clamping groove is formed in the inner wall of the lantern ring, and the elastic clamping block is connected with the clamping groove in a sliding mode. And the elastic clamping block is embedded into the clamping groove. According to the invention, soil sampling and PH detection are integrated, so that the device has relatively high practicability; according to the invention, soil with different depths can be detected, sampling and detection links are automatic, and the use convenience is high, so that the working efficiency of detection personnel is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil pH value detection, and particularly relates to a pH value measuring device and a using method for evaluating the soil carbon sequestration capacity. Background Art

[0002] Soil acidity and alkalinity is also known as "soil pH". The soil pH value is one of the important factors affecting the soil carbon sequestration capacity. By measuring the pH value of the soil, the acid-base properties of the soil can be understood, and then its influence on the carbon sequestration process can be evaluated.

[0003] Chinese Patent No. CN220171027U discloses a soil pollution pH detection device, which relates to the field of soil detection. The soil pollution pH detection device includes a detection dial main body, and a probe is arranged at the bottom of the detection dial main body, and the bottom of the probe is inserted into the soil. In this soil pollution pH detection device, the insertion rod is inserted into the soil along with the probe, and the adjustment block is pressed to drive the baffle outwards. Then, when the pressed adjustment block is released, the baffle is driven by the pushing force of the spring strip to retract into the collection port. Through multiple operations, the outer wall of the baffle squeezes the soil on the outer wall of the insertion rod to loosen the soil. And when the baffle retracts, some soil is driven through the collection port into the inner cavity of the insertion rod, which is convenient for sampling, and it is convenient to bring these soils that are difficult to detect back to the laboratory for more comprehensive and accurate detection, which is beneficial to the accuracy of soil pollution pH detection.

[0004] When this device is in use, limited by the length of the probe, it is difficult for this device to detect the soil at a very deep place; affected by various factors, the pH values of soils at different depths are different, and this device is difficult to detect the soils at different depths, that is, more detailed pH value data of the soil here cannot be obtained. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a pH value measuring device and a using method for evaluating the soil carbon sequestration capacity to solve the above problems.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A pH value measuring device for evaluating the soil carbon sequestration capacity, comprising a sampling tube, a probe and a base. An installation frame is provided on the base, and a roller lifting mechanism is installed on the installation frame. The sampling tube is drivingly matched with the roller lifting mechanism. A detection inlet matching the probe is opened on one side of the sampling tube. A transverse driving mechanism and a motor are installed on the base. A collar is provided on the transverse driving mechanism. The probe is slidably connected through the collar. Elastic clamping blocks are provided on the outer surface of the collar, and clamping grooves are opened on the inner wall of the collar. The elastic clamping blocks are engaged with the clamping grooves. A rotating block is rotatably connected to the installation frame. A first sector gear is coaxially and fixedly connected to the side of the rotating block away from the installation frame. A second sector gear matching the first sector gear is slidably connected to the side of the rotating block away from the installation frame. A first spring is provided between the rotating block and the second sector gear. Both the first sector gear and the second sector gear are drivingly matched with the roller lifting mechanism. First stoppers and second stoppers are respectively fixedly connected to the sides of the first sector gear and the second sector gear away from the installation frame. The output end of the motor is coaxially arranged with the second sector gear and a push block is fixedly connected to the output end. Both the first stopper and the second stopper are matched with the push block. An inclined surface is provided on the side of the second sector gear close to the axis. A claw mechanism is installed at the bottom end of the sampling tube. A rod pressing mechanism is provided on the sampling tube. The bottom end of the rod pressing mechanism is drivingly connected to the claw mechanism. The top end of the rod pressing mechanism penetrates through the sampling tube and a first distance sensor is provided at the end. The detection part of the first distance sensor faces the top end of the sampling tube. The first distance sensor is electrically connected to the motor.

[0007] Preferably, a sliding groove is opened on the side of the rotating block away from the installation frame. A plugging part is provided on the side of the second sector gear close to the rotating block. The plugging part is inserted into the sliding groove and can slide in the sliding groove. The first spring is installed between the inner wall of the sliding groove and the plugging part.

[0008] Preferably, the transverse driving mechanism includes a first support and a second support fixedly connected to the base. The top end of the first support is fixedly connected to the collar. The second support is located between the sampling tube and the first support. A positioning ring is provided at the top end of the second support. An annular soft pad is provided on the inner wall of the positioning ring. The probe is slidably connected through the annular soft pad.

[0009] Preferably, a guide rod is fixedly connected to one side of the second bracket close to the first bracket, and a screw rod is rotatably connected thereto. A positioning hole and an internal thread ring are provided on the first bracket. The guide rod is slidably connected through the positioning hole. A second spring is sleeved on the guide rod between the first bracket and the second bracket. The screw rod is threadedly connected through the internal thread ring. One end of the screw rod passing through the internal thread ring is coaxially provided with a one-way bearing, and a first gear is coaxially provided on the one-way bearing. The first sector gear is matched with the first gear. A second distance sensor is installed on the second bracket, the detection part of the second distance sensor faces the first bracket, and the second distance sensor is electrically connected to the motor.

[0010] Preferably, the roller lifting mechanism includes two roller groups, which are respectively located on both sides of the sampling tube. Each roller group includes a transmission belt and more than two rollers. The rollers are all wound and matched with the transmission belt. The outer surface of the roller is attached to the outer wall of the sampling tube. A rotating shaft is coaxially and fixedly connected to the roller, and the rotating shaft is rotatably connected to the mounting bracket. A second gear is coaxially and fixedly connected to the rotating shaft, and the second gears on the two roller groups are meshed with each other. A third gear is coaxially and fixedly connected to one of the rotating shafts, and the first sector gear is matched with the third gear.

[0011] Preferably, a positioning groove is formed on the base, the outer surface of the sampling tube is slidably matched with the inner wall of the positioning groove, and a leak-proof net is arranged in the detection inlet.

[0012] Preferably, the clamping jaw mechanism includes a mounting groove formed at the bottom end of the sampling tube. A clamping plate is hinged on the mounting groove. Torsion springs are installed at the tops of the sides where the two clamping plates are close to each other, and the other ends of the torsion springs are fixedly connected to the inner wall of the sampling tube. A limiting protrusion matched with the clamping plate is fixedly connected to the mounting groove. When the clamping plate is in a vertical state, it can only rotate towards the middle of the sampling tube. Blades are arranged at the bottom ends of the sampling tube and the clamping plate.

[0013] Preferably, the pressing rod mechanism includes a guide ring fixedly connected to the inner wall of the sampling tube. A pressing rod is slidably matched in the guide ring. The top end of the pressing rod penetrates through the sampling tube and its end is fixedly connected with a pressing handle. The first distance sensor is installed on the pressing handle. A third spring is installed between the bottom of the pressing handle and the top end of the sampling tube. When the pressing rod descends, the bottom end of the pressing rod presses against the clamping plate to rotate away from the middle of the sampling tube. An arc-shaped elastic buckle is arranged on one side of the pressing rod, and a clamping hole matched with the arc-shaped elastic buckle is formed on the side wall of the sampling tube.

[0014] Preferably, a display is mounted on the mounting frame, a third distance sensor is mounted on one end of the probe away from the sampling tube, a detection portion of the third distance sensor is arranged toward the first bracket, and the third distance sensor is electrically connected to the display.

[0015] A method for using a pH value measuring device for evaluating soil carbon sequestration capacity comprises the following steps: S1: In the initial state, the arc-shaped elastic buckle and the clamping hole are in a fitted state, and the bottom end of the push rod is pressed against the clamping plate, and the clamping plate is in an upright state at this time; the motor is started to drive the push block to rotate forward, and the push block presses against the inclined surface to make the second sector gear slide and merge with the first sector gear to form a circular gear, and the push block continues to rotate to press against the second stopper to rotate forward, and the first sector gear and the second sector gear rotate forward and drive the roller lifting mechanism to lower the sampling tube, and the sampling tube is inserted into the soil; S2: When the sampling tube descends to the point where the arc-shaped elastic buckle contacts the edge of the positioning groove, the arc-shaped elastic buckle contracts and releases the limit on the push rod, the third spring pushes the pressure handle upward, the push rod rises and releases the limit on the clamping plate, and the torsion spring releases the force to make the two clamping plates approach each other and clamp the soil at the bottom end of the sampling tube; S3: When the pressing handle rises, the first distance sensor detects that the distance to the top of the sampling tube increases, and the control motor turns to reverse rotation. The push block rotates in the opposite direction and no longer presses against the second sector gear. The first spring presses the second sector gear to reset and disengage from the first sector gear. The push block continues to rotate in the opposite direction to push the first stopper to rotate the first sector gear. The first sector gear intermittently drives the roller lifting mechanism to intermittently raise the sampling tube, and at the same time intermittently drives the horizontal driving mechanism to intermittently insert the probe into the sampling tube, so as to realize pH measurement of soil at different depths.

[0016] The beneficial effects of the present invention are: 1. The present invention integrates soil sampling and pH detection, and has high practicality; the present invention can detect soils of different depths, and the sampling and detection links are both automated, and the use convenience is high, thereby improving the work efficiency of the detection personnel.

[0017] 2. During the process of inserting the probe into the sampling tube, if there is a hard object in the sampling tube causing the probe to be inserted shallowly, the probe will automatically stop inserting through the coordinated arrangement of the elastic card block, the card slot, the third distance sensor and the display, thereby preventing the probe from being damaged. At the same time, the display will record that the probe has been inserted shallowly, requiring the staff to conduct a separate test on the soil at this location later to avoid a reduction in the accuracy of the test data due to the shallow insertion depth of the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 Structural schematic of the present invention Figure 2 ; Figure 3 Structural schematic of the lateral driving mechanism of the present invention; Figure 4 Structural schematic of the top end of the sampling tube of the present invention; Figure 5 Structural schematic of the bottom end of the sampling tube of the present invention; Figure 6 For the present invention Figure 1 Structural schematic of the partial enlargement at position A in the present invention; Figure 7 Cross-sectional structural schematic of the collar of the present invention; Figure 8 Exploded structural schematic of the rotating block of the present invention.

[0019] In the drawings: 1. Sampling tube; 2. Probe; 3. Base; 4. Detection inlet; 5. Collar; 6. Elastic clamping block; 7. Anti-leakage net; 8. Rotating block; 9. Mounting frame; 10. First sector gear; 11. Second sector gear; 12. First stop block; 13. Second stop block; 14. Pusher block; 15. Inclined surface; 16. Pushing rod; 17. First distance sensor; 18. Chute; 19. Insertion part; 20. First spring; 21. First bracket; 22. Second bracket; 23. Positioning ring; 24. Annular soft pad; 25. Guide rod; 26. Screw; 27. Internal thread ring; 28. One-way bearing; 29. First gear; 30. Second distance sensor; 31. Transmission belt; 32. Roller; 33. Rotating shaft; 34. Second gear; 35. Third gear; 36. Positioning groove; 37. Motor; 38. Clamp plate; 39. Torsion spring; 40. Guide ring; 41. Pressing handle; 42. Second spring; 43. Arc-shaped elastic buckle; 44. Third distance sensor; 45. Third spring; 46. Display. Detailed implementation manners

[0020] Next, each embodiment of the present invention will be described in detail with reference to the reference Figures 1 to 8 Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0021] First embodiment: A pH value measuring device for evaluating the soil carbon sequestration capacity, as Figures 1 - 3 and Figure 7As shown in the figure, it includes a sampling tube 1, a probe 2 and a base 3. The probe 2 is a soil pH measurement probe, which is a prior art and will not be elaborated here. A display 46 is installed on the mounting frame 9. The display 46 is signal-connected to the probe 2, and the data detected by the probe 2 is displayed on the display 46. A mounting frame 9 is provided on the base 3, and a roller lifting mechanism is installed on the mounting frame 9. The sampling tube 1 is drivingly engaged with the roller lifting mechanism, and the roller lifting mechanism is used to drive the sampling tube 1 to rise or fall. A detection inlet 4 matching the probe 2 is provided on one side of the sampling tube 1. A lateral driving mechanism and a motor 37 are installed on the base 3. The motor 37 is a servo motor, and a control system (such as a controller) is provided on the motor 37, which can control the start and stop of the motor 37. A collar 5 is provided on the lateral driving mechanism. The probe 2 is slidably connected through the collar 5. Elastic clamping blocks 6 are provided on the outer surface of the collar 5, and clamping grooves are provided on the inner wall of the collar 5. The elastic clamping blocks 6 are engaged with the clamping grooves. When the lateral driving mechanism drives the collar 5 to bring the probe 2 close to the sampling tube 1, the probe 2 is inserted into the sampling tube 1 through the detection inlet 4, so as to detect the soil in the sampling tube 1.

[0022] As Figure 1 , Figure 3 , Figure 6 and Figure 8 shown in the figure, a rotating block 8 is rotatably connected to the mounting frame 9. A first sector gear 10 is coaxially and fixedly connected to the side of the rotating block 8 away from the mounting frame 9. A second sector gear 11 matching the first sector gear 10 is slidably connected to the side of the rotating block 8 away from the mounting frame 9. When the first sector gear 10 and the second sector gear 11 are aligned, they are combined into a circular gear, and a first spring 20 is provided between the rotating block 8 and the second sector gear 11. Both the first sector gear 10 and the second sector gear 11 are drivingly engaged with the roller lifting mechanism. First stoppers 12 and second stoppers 13 are respectively fixedly connected to the sides of the first sector gear 10 and the second sector gear 11 away from the mounting frame 9. The output end of the motor 37 is coaxially arranged with the second sector gear 11 and a push block 14 is fixedly connected to the output end. Both the first stopper 12 and the second stopper 13 are matched with the push block 14. An inclined surface 15 is provided on the side of the second sector gear 11 close to the axis. When the motor 37 drives the push block 14 to rotate forward, the push block 14 first abuts against the inclined surface 15, causing the second sector gear 11 to move closer to the rotating block 8. The first sector gear 10 aligns with the second sector gear 11 and combines into a circular gear. At the same time, the first spring 20 compresses and stores energy. Then, when the push block 14 continues to rotate, it will abut against the second stop block 13 and rotate it forward, causing the first sector gear 10 and the second sector gear 11 to rotate forward in the combined state. When the motor 37 drives the push block 14 to rotate in the reverse direction, after the push block 14 rotates in the reverse direction, it no longer abuts against the second sector gear 11. The first spring 20 abuts against the second sector gear 11 and moves it away from the rotating block 8, that is, the first sector gear 10 and the second sector gear 11 are disengaged. When the push block 14 continues to rotate in the reverse direction, it will push the first stop block 12 to rotate the first sector gear 10, causing the first sector gear 10 and the second sector gear 11 to rotate in the reverse direction in the separated state.

[0023] As Figure 8 shown, a chute 18 is provided on the side of the rotating block 8 away from the mounting bracket 9. A plug-in portion 19 is provided on the side of the second sector gear 11 close to the rotating block 8. The plug-in portion 19 is inserted into the chute 18 and can slide within the chute 18. The first spring 20 is installed between the inner wall of the chute 18 and the plug-in portion 19. Through the cooperative setting of the plug-in portion 19 and the chute 18, the second sector gear 11 can slide, realizing the combination or separation of the first sector gear 10 and the second sector gear 11.

[0024] As Figure 1 、 Figure 3 、 Figure 6 and Figure 7 shown, the lateral drive mechanism includes a first bracket 21 and a second bracket 22 fixedly connected to the base 3. The top of the first bracket 21 is fixedly connected to the collar 5. The second bracket 22 is located between the sampling tube 1 and the first bracket 21. A positioning ring 23 is provided at the top of the second bracket 22. An annular soft pad 24 is provided on the inner wall of the positioning ring 23. The probe 2 is slidably connected through the annular soft pad 24. A guide rod 25 is fixedly connected to the side of the second bracket 22 close to the first bracket 21, and a screw rod 26 is rotatably connected. A positioning hole and an internal thread ring 27 are provided on the first bracket 21. The guide rod 25 is slidably connected through the positioning hole. A second spring 42 is sleeved on the guide rod 25 between the first bracket 21 and the second bracket 22. The screw rod 26 is threadedly connected through the internal thread ring 27. One end of the screw rod 26 passing through the internal thread ring 27 is coaxially provided with a one-way bearing 28. A first gear 29 is coaxially provided on the one-way bearing 28. Through the setting of the one-way bearing 28, when the first gear 29 rotates forward, the screw rod 26 will not rotate. When the first gear 29 rotates in the reverse direction, it drives the screw rod 26 to rotate. The first sector gear 10 matches the first gear 29. A second distance sensor 30 is installed on the second bracket 22. The detection part of the second distance sensor 30 faces the first bracket 21. The second distance sensor 30 is electrically connected to the motor 37.

[0025] When the motor 37 rotates in the reverse direction, the first sector gear 10 and the second sector gear 11 rotate in the reverse direction in a separated state. At this time, only the first sector gear 10 is aligned with the first gear 29, that is, only the first sector gear 10 drives the first gear 29. That is, during the reverse rotation of the first sector gear 10, the first gear 29 rotates intermittently in the reverse direction.

[0026] It should be noted that when the first gear 29 rotates in the reverse direction, the screw 26 rotates following the first gear 29. With the cooperation of the guide rod 25 and the internal thread ring 27, the first bracket 21 moves closer to the second bracket 22. At the same time, the second spring 42 compresses and stores energy. The first bracket 21 drives the collar 5 and the probe 2 closer to the sampling tube 1, and the probe 2 is inserted into the interior of the sampling tube 1 through the detection inlet 4.

[0027] As the first bracket 21 moves, the distance from the second distance sensor 30 to the first bracket 21 gradually decreases. When the depth of the probe 2 inserted into the sampling tube 1 reaches the set value (at this time, the first sector gear 10 rotates to be about to disengage from the first gear 29), that is, the distance detected by the second distance sensor 30 to the first bracket 21 decreases to the set value, the motor 37 is controlled to stop rotating temporarily, and the probe 2 detects the soil pH value.

[0028] After the motor 37 stops for a period of time, it automatically starts again. The first sector gear 10 continues to rotate and disengages from the first gear 29. The second spring 42 expands and abuts against the first bracket 21 to reset, so that the probe 2 resets and is withdrawn from the sampling tube 1.

[0029] As Figure 1 、 Figure 2 and Figure 6 shown, the roller lifting mechanism includes two roller groups, which are respectively located on both sides of the sampling tube 1; each roller group includes a transmission belt 31 and more than two rollers 32. A plurality of rollers 32 are all wound and cooperated with the transmission belt 31. The outer surface of the roller 32 is attached to the outer wall of the sampling tube 1. Through the setting of the transmission belt 31, it is ensured that the rollers 32 on the same roller group rotate synchronously; a rotating shaft 33 is coaxially and fixedly connected to the roller 32, and the rotating shaft 33 is rotatably connected to the mounting bracket 9; a second gear 34 is coaxially and fixedly connected to the rotating shaft 33, and the second gears 34 on the two roller groups mesh with each other. A third gear 35 is coaxially and fixedly connected to one of the rotating shafts 33; when the third gear 35 rotates, the corresponding rotating shaft 33 and the roller 32 rotate. Through the setting of the transmission belt 31, all the rollers 32 on the corresponding roller group rotate synchronously. By using the setting of the second gears 34 on the two roller groups, all the rollers 32 on the other roller group rotate, and the rotating directions of the rollers 32 on the two roller groups are opposite, so as to realize the lifting or lowering of the sampling tube 1.

[0030] The first sector gear 10 is matched with the third gear 35. When the first sector gear 10 and the second sector gear 11 rotate in the combined state, the third gear 35 is continuously driven to rotate; when the first sector gear 10 and the second sector gear 11 rotate in the separated state, only the first sector gear 10 drives the third gear 35 to rotate, that is, the third gear 35 rotates intermittently.

[0031] As Figure 5 shown, a jaw mechanism is installed at the bottom end of the sampling tube 1. The jaw mechanism includes an installation groove opened at the bottom end of the sampling tube 1. A clamping plate 38 is hinged on the installation groove. A torsion spring 39 is installed at the top end of each side where the two clamping plates 38 approach each other. The other end of the torsion spring 39 is fixedly connected to the inner wall of the sampling tube 1; a limiting protrusion matching the clamping plate 38 is fixedly connected to the installation groove. When the clamping plate 38 is in the vertical state, it can only rotate towards the direction close to the middle of the sampling tube 1; blades are provided at the bottom end of the sampling tube 1 and the bottom end of the clamping plate 38. Through the setting of the blades, the resistance of the sampling tube 1 inserted into the soil can be reduced; after the sampling tube 1 completes sampling, through the setting of the jaw mechanism, the soil at the bottom end of the sampling tube 1 can be clamped, thereby preventing the soil inside the sampling tube 1 from flowing out from the bottom end of the sampling tube 1 when the sampling tube 1 rises.

[0032] As Figure 1 、 Figure 4 and Figure 5 shown, a pressing rod mechanism is provided on the sampling tube 1. The bottom end of the pressing rod mechanism is drivingly connected to the jaw mechanism. The top end of the pressing rod mechanism penetrates through the sampling tube 1 and a first distance sensor 17 is provided at its end. The detection part of the first distance sensor 17 is arranged towards the top end of the sampling tube 1. The first distance sensor 17 is electrically connected to the motor 37; the pressing rod mechanism includes a guiding ring 40 fixedly connected to the inner wall of the sampling tube 1. A pressing rod 16 is slidably fitted in the guiding ring 40. The top end of the pressing rod 16 penetrates through the sampling tube 1 and a pressing handle 41 is fixedly connected to its end. The first distance sensor 17 is installed on the pressing handle 41. A third spring 45 is installed between the bottom of the pressing handle 41 and the top end of the sampling tube 1; when the device completes the detection of the soil pH value and needs to discharge the soil, press the pressing handle 41 to make the pressing rod 16 descend. The bottom end of the pressing rod 16 abuts against the clamping plate 38 to make the clamping plate 38 rotate in the direction away from the middle of the sampling tube 1, so that the clamping plate 38 no longer clamps the soil at the bottom end of the sampling tube 1, and the soil inside the sampling tube 1 is discharged from the bottom end of the sampling tube 1; an arc-shaped elastic buckle 43 is provided on one side of the pressing rod 16, and a clamping hole matching the arc-shaped elastic buckle 43 is opened on the side wall of the sampling tube 1.

[0033] As Figure 3As shown, a positioning groove 36 is formed on the base 3, and the outer surface of the sampling tube 1 is in sliding fit with the inner wall of the positioning groove 36. A leak-proof net 7 is provided in the detection inlet 4. Through the setting of the leak-proof net 7, it is possible to prevent a large amount of soil in the sampling tube 1 from flowing out through the detection inlet 4. The leak-proof net 7 is made of plastic ropes and has a certain elasticity, which will not affect the probe 2 passing through the detection inlet 4.

[0034] As Figure 3 and Figure 7 As shown, a third distance sensor 44 is installed at one end of the probe 2 away from the sampling tube 1. The detection part of the third distance sensor 44 faces the first bracket 21, and the third distance sensor 44 is electrically connected to the display 46.

[0035] The working principle of the device in this embodiment: In the initial state, the arc-shaped elastic buckle 43 is in an engaged state with the card hole, and the bottom end of the abutting rod 16 abuts against the clamping plate 38, that is, the clamping plate 38 is in an upright state at this time.

[0036] Start the motor 37 to drive the push block 14 to rotate forward. The push block 14 first abuts against the inclined surface 15 to make the second sector gear 11 move closer to the rotating block 8. The first sector gear 10 is aligned with the second sector gear 11 and combined into a circular gear (at the same time, the first spring 20 is compressed and stores energy). When the push block 14 continues to rotate, it will abut against the second stop block 13 to rotate forward, so that the first sector gear 10 and the second sector gear 11 rotate forward in the combined state, driving the third gear 35 to continuously rotate forward. The corresponding rotating shaft 33 and the roller 32 rotate. Through the setting of the transmission belt 31 and the two second gears 34, the rollers 32 on both sides of the sampling tube 1 rotate and push the sampling tube 1 downward, so as to insert the sampling tube 1 into the specified location.

[0037] It should be noted that when the first sector gear 10 and the second sector gear 11 rotate forward in the combined state, it will drive the first gear 29 to rotate forward. Through the setting of the one-way bearing 28, the screw rod 26 will not rotate at this time.

[0038] When the sampling tube 1 descends to the set position, that is, the arc-shaped elastic buckle 43 is abutted by the edge of the positioning groove 36, the arc-shaped elastic buckle 43 contracts and releases the limit on the abutting rod 16. The third spring 45 abuts against the pressing handle 41 to rise, the abutting rod 16 rises and releases the limit on the clamping plate 38, and the torsion spring 39 releases force to make the two clamping plates 38 approach each other and clamp the soil at the bottom end of the sampling tube 1.

[0039] It should be noted that while the pressing handle 41 rises, the distance detected by the first distance sensor 17 to the top of the sampling tube 1 increases, the control motor 37 is turned to rotate in the reverse direction, the pushing block 14 rotates in the reverse direction, and the pushing block 14 no longer abuts against the second sector gear 11 after rotating in the reverse direction. The first spring 20 abuts against the second sector gear 11 to move away from the rotating block 8, that is, the first sector gear 10 is disengaged from the second sector gear 11. When the pushing block 14 continues to rotate in the reverse direction, it will push the first stop block 12 to make the first sector gear 10 rotate. The first sector gear 10 and the second sector gear 11 rotate in the reverse direction in the separated state. At this time, only the first sector gear 10 is aligned with the third gear 35, that is, only the first sector gear 10 can drive the third gear 35. During the reverse rotation of the first sector gear 10, the third gear 35 rotates intermittently in the reverse direction, the roller 32 rotates intermittently and the sampling tube 1 rises intermittently (it should be noted that each time the first sector gear 10 rotates to be disengaged from the third gear 35, that is, each time the sampling tube 1 stops rising, affected by factors such as the friction force and rotation resistance of the roller 32, the sampling tube 1 will not fall).

[0040] After the first sector gear 10 rotates in the reverse direction to be disengaged from the third gear 35, the first sector gear 10 continues to rotate and meshes with the first gear 29 to drive the first gear 29 to rotate in the reverse direction (the central angle of the first sector gear 10 is set according to requirements and is not specifically limited, and it must be ensured that the first gear 29 and the third gear 35 do not rotate simultaneously). The screw 26 rotates following the first gear 29, and then in cooperation with the arrangement of the guide rod 25 and the internal thread ring 27, the first bracket 21 moves closer to the second bracket 22. At the same time, the second spring 42 is compressed and stores energy. The first bracket 21 drives the collar 5 and the probe 2 to move, so that the probe 2 is inserted into the interior of the sampling tube 1 through the detection inlet 4.

[0041] As the first bracket 21 moves, the distance from the second distance sensor 30 to the first bracket 21 gradually decreases. When the depth of the probe 2 inserted into the sampling tube 1 reaches the set value (simultaneously the first sector gear 10 rotates to be about to be disengaged from the first gear 29), that is, the distance detected by the second distance sensor 30 to the first bracket 21 decreases to the set value, the control motor 37 is temporarily stopped, and the probe 2 detects the soil pH value; after the motor 37 stops for a period of time, it automatically starts again (realized by the control system on the motor 37 to automatically start after stopping for a period of time. This is an existing technology and will not be elaborated too much here. By stopping the motor 37 for a period of time, sufficient detection time for the probe 2 is ensured). The first sector gear 10 continues to rotate and is disengaged from the first gear 29. The second spring 42 releases its force and expands to abut against the first bracket 21 to reset, so that the probe 2 is reset and withdrawn from the sampling tube 1. Then, the first sector gear 10 continues to rotate and meshes with the third gear 35 again, making the sampling tube 1 rise again; during the use of the device in this embodiment, the sampling tube 1 is intermittently raised and the soil is detected continuously, and the function of detecting the soil pH at different depths by the device can be realized, and the practicability is relatively high.

[0042] It should be noted that each time the probe 2 is withdrawn from the sampling tube 1, the annular soft pad 24 automatically wipes off the soil attached to the surface of the probe 2, improving the accuracy of the next detection data of the probe 2.

[0043] It is worth noting that during the process of the first bracket 21 pushing the probe 2 into the sampling tube 1, if there are hard objects (such as stones, etc.) in the sampling tube 1 resulting in a shallower insertion depth of the probe 2, to prevent damage to the probe 2, when the first bracket 21 approaches the second bracket 22 with the collar 5, the elastic catch 6 deforms and disengages from the card slot, so that the movement of the first bracket 21 will no longer apply a thrust to the probe 2. At the same time, the third distance sensor 44 detects an increase in the distance to the first bracket 21 and transmits data to the display 46, and the display 46 records that the probe 2 has a shallower insertion depth here, and it is necessary for the staff to separately detect the soil here later; it should be noted that when the first bracket 21 moves away from the second bracket 22 for resetting, the probe 2 is pulled out of the sampling tube 1, and due to the limiting effect of the mounting frame 9, the sampling tube 1 cannot move further after moving to abut against the mounting frame 9, and the continuous movement of the first bracket 21 will cause the elastic catch 6 to snap back into the card slot again.

[0044] Second Embodiment: As Figures 1 - 8 shown, a method for using a pH value measuring device for evaluating the soil carbon sequestration capacity includes the following steps: S1: In the initial state, the arc-shaped elastic buckle 43 is in an engaged state with the card hole, and the bottom end of the abutting rod 16 abuts against the clamping plate 38. At this time, the clamping plate 38 is in an upright state; start the motor 37 to drive the push block 14 to rotate forward. The push block 14 abuts against the inclined surface 15 to make the second sector gear 11 slide and merge with the first sector gear 10 into a circular gear. The continuous rotation of the push block 14 will abut against the second stop block 13 to rotate forward continuously. The first sector gear 10 and the second sector gear 11 rotate forward and drive the roller lifting mechanism to lower the sampling tube 1, so that the sampling tube 1 is inserted into the soil. S2: When the sampling tube 1 descends to the point where the arc-shaped elastic buckle 43 is abutted by the edge of the positioning groove 36, the arc-shaped elastic buckle 43 contracts and releases the limit on the abutting rod 16. The third spring 45 pushes the pressing handle 41 to rise, and the abutting rod 16 rises to release the limit on the clamping plate 38. The torsion spring 39 releases force to make the two clamping plates 38 approach each other and clamp the soil at the bottom end of the sampling tube 1, preventing the soil in the sampling tube 1 from flowing out from the bottom end when the sampling tube 1 rises later. S3: When the pressing handle 41 rises, the first distance sensor 17 detects that the distance to the top of the sampling tube 1 increases, and the control motor 37 is rotated in the reverse direction. The push block 14 rotates in the reverse direction and no longer abuts against the second sector gear 11. The first spring 20 abuts against the second sector gear 11 to reset and disengages from the first sector gear 10. When the push block 14 continues to rotate in the reverse direction, it will push the first stop block 12 to make the first sector gear 10 rotate. The first sector gear 10 intermittently drives the roller lifting mechanism to intermittently lift the sampling tube 1. At the same time, it intermittently drives the lateral driving mechanism to intermittently insert the probe 2 into the sampling tube 1, so as to realize the pH measurement of soils at different depths.

[0045] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0047] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A pH value measuring device for evaluating the soil carbon sequestration capacity, comprising a sampling tube (1), a probe (2) and a base (3), characterized in that, An installation frame (9) is provided on the base (3), a roller lifting mechanism is installed on the installation frame (9), and the sampling tube (1) is in driving cooperation with the roller lifting mechanism; a detection inlet (4) matching the probe (2) is provided on one side of the sampling tube (1), a lateral driving mechanism and a motor (37) are installed on the base (3), a collar (5) is provided on the lateral driving mechanism, the probe (2) is slidably connected through the collar (5), an elastic clamping block (6) is provided on the outer surface of the collar (5), a clamping groove is provided on the inner wall of the collar (5), and the elastic clamping block (6) is fitted with the clamping groove; a rotating block (8) is rotatably connected to the installation frame (9), a first sector gear (10) is coaxially and fixedly connected to the side of the rotating block (8) away from the installation frame (9), a second sector gear (11) matching the first sector gear (10) is slidably connected to the side of the rotating block (8) away from the installation frame (9), and a first spring (20) is provided between the rotating block (8) and the second sector gear (11), and both the first sector gear (10) and the second sector gear (11) are in driving cooperation with the roller lifting mechanism; first stoppers (12) and second stoppers (13) are respectively fixedly connected to the sides of the first sector gear (10) and the second sector gear (11) away from the installation frame (9), the output end of the motor (37) is coaxially arranged with the second sector gear (11) and a push block (14) is fixedly connected to the output end, both the first stopper (12) and the second stopper (13) are matched with the push block (14), and an inclined surface (15) is provided on the side of the second sector gear (11) close to the axis; A jaw mechanism is installed at the bottom end of the sampling tube (1), a pressing rod mechanism is provided on the sampling tube (1), the bottom end of the pressing rod mechanism is in driving connection with the jaw mechanism, the top end of the pressing rod mechanism passes through the sampling tube (1) and a first distance sensor (17) is provided at the end, the detection part of the first distance sensor (17) is arranged towards the top end of the sampling tube (1), and the first distance sensor (17) is electrically connected to the motor (37).

2. The pH value measuring device for evaluating the soil carbon sequestration capacity according to claim 1, wherein A chute (18) is provided on the side of the rotating block (8) away from the installation frame (9), a plug-in part (19) is provided on the side of the second sector gear (11) close to the rotating block (8), the plug-in part (19) is inserted into the chute (18) and can slide in the chute (18), and the first spring (20) is installed between the inner wall of the chute (18) and the plug-in part (19).

3. The pH value measuring device for evaluating the soil carbon sequestration capacity according to claim 1, characterized in that, The lateral driving mechanism includes a first support (21) and a second support (22) fixedly connected to the base (3), the top end of the first support (21) is fixedly connected to the collar (5), the second support (22) is located between the sampling tube (1) and the first support (21), a positioning ring (23) is provided at the top end of the second support (22), an annular soft pad (24) is provided on the inner wall of the positioning ring (23), and the probe (2) is slidably connected through the annular soft pad (24).

4. The pH value measuring device for evaluating the soil carbon sequestration capacity according to claim 3, characterized in that, On one side of the second bracket (22) close to the first bracket (21), a guide rod (25) is fixedly connected and a screw rod (26) is rotatably connected. A positioning hole and an internal thread ring (27) are provided on the first bracket (21). The guide rod (25) is slidably connected through the positioning hole. A second spring (42) is sleeved on the guide rod (25) between the first bracket (21) and the second bracket (22); the screw rod (26) is threadedly connected through the internal thread ring (27). One end of the screw rod (26) passing through the internal thread ring (27) is coaxially provided with a one-way bearing (28). A first gear (29) is coaxially provided on the one-way bearing (28). The first sector gear (10) is matched with the first gear (29); a second distance sensor (30) is installed on the second bracket (22). The detection part of the second distance sensor (30) faces the first bracket (21). The second distance sensor (30) is electrically connected to the motor (37).

5. The pH value measuring device for soil carbon sequestration capacity assessment according to claim 1, characterized in that, The roller lifting mechanism includes two roller groups, which are respectively located on both sides of the sampling tube (1); each roller group includes a transmission belt (31) and more than two rollers (32). A plurality of rollers (32) are all wound and matched with the transmission belt (31). The outer surface of the roller (32) is attached to the outer wall of the sampling tube (1). A rotating shaft (33) is coaxially and fixedly connected to the roller (32). The rotating shaft (33) is rotatably connected to the mounting bracket (9); a second gear (34) is coaxially and fixedly connected to the rotating shaft (33). The second gears (34) on the two roller groups are meshed with each other; A third gear (35) is coaxially and fixedly connected to one of the rotating shafts (33). The first sector gear (10) is matched with the third gear (35).

6. The pH value measuring device for evaluating the soil carbon sequestration capacity according to claim 1, characterized in that, A positioning groove (36) is formed on the base (3). The outer surface of the sampling tube (1) is slidably matched with the inner wall of the positioning groove (36). A leak-proof net (7) is arranged in the detection inlet (4).

7. The pH value measuring device for soil carbon sequestration capacity assessment according to claim 6, characterized in that The jaw mechanism includes a mounting groove formed at the bottom end of the sampling tube (1). A clamping plate (38) is hinged on the mounting groove. A torsion spring (39) is installed at the top end of one side where the two clamping plates (38) are close to each other. The other end of the torsion spring (39) is fixedly connected to the inner wall of the sampling tube (1); a limiting protrusion matched with the clamping plate (38) is fixedly connected to the mounting groove. When the clamping plate (38) is in an upright state, it can only rotate towards the direction close to the middle of the sampling tube (1); blades are arranged at the bottom end of the sampling tube (1) and the bottom end of the clamping plate (38).

8. The pH value measuring device for evaluating the soil carbon sequestration capacity according to claim 7, characterized in that, The abutting rod mechanism includes a guide ring (40) fixedly connected to the inner wall of the sampling tube (1). A abutting rod (16) is slidably fitted in the guide ring (40). The top end of the abutting rod (16) penetrates through the sampling tube (1) and a pressing handle (41) is fixedly connected to its end. The first distance sensor (17) is installed on the pressing handle (41). A third spring (45) is installed between the bottom of the pressing handle (41) and the top end of the sampling tube (1). When the abutting rod (16) descends, the bottom end of the abutting rod (16) abuts against the clamping plate (38) and rotates the clamping plate (38) away from the middle of the sampling tube (1). An arc-shaped elastic buckle (43) is provided on one side of the abutting rod (16), and a clamping hole matching the arc-shaped elastic buckle (43) is formed on the side wall of the sampling tube (1).

9. The pH value measuring device for soil carbon sequestration capacity assessment according to claim 3, wherein, A display (46) is installed on the mounting frame (9). A third distance sensor (44) is installed at one end of the probe (2) away from the sampling tube (1). The detection part of the third distance sensor (44) faces the first support (21). The third distance sensor (44) is electrically connected to the display (46).

10. A method for using a pH value measuring device for evaluating soil carbon sequestration capacity, wherein the method uses a pH value measuring device for evaluating soil carbon sequestration capacity as described in claim 8 to measure the pH value of soil, and is characterized in that, It includes the following steps: S1: In the initial state, the arc-shaped elastic buckle (43) and the clamping hole are in an engaged state, and the bottom end of the abutting rod (16) abuts against the clamping plate (38). At this time, the clamping plate (38) is in an upright state. Start the motor (37) to drive the push block (14) to rotate forward. The push block (14) abuts against the inclined surface (15) to make the second sector gear (11) slide and merge with the first sector gear (10) into a circular gear. When the push block (14) continues to rotate, it will abut against the second stop block (13) to rotate forward. The first sector gear (10) and the second sector gear (11) rotate forward and drive the roller lifting mechanism to lower the sampling tube (1), and the sampling tube (1) is inserted into the soil. S2: When the sampling tube (1) descends until the arc-shaped elastic buckle (43) is abutted by the edge of the positioning groove (36), the arc-shaped elastic buckle (43) contracts and releases the limit on the abutting rod (16). The third spring (45) abuts against the pressing handle (41) to rise. The abutting rod (16) rises to release the limit on the clamping plate (38). The torsion spring (39) releases force to make the two clamping plates (38) approach each other and clamp the soil at the bottom end of the sampling tube (1). S3: When the pressing handle (41) rises, the first distance sensor (17) detects that the distance from the top end of the sampling tube (1) increases. Control the motor (37) to rotate in the reverse direction. The push block (14) rotates in the reverse direction and no longer abuts against the second sector gear (11). The first spring (20) abuts against the second sector gear (11) to reset and disengages from the first sector gear (10). When the push block (14) continues to rotate in the reverse direction, it will push the first stop block (12) to make the first sector gear (10) rotate. The first sector gear (10) intermittently drives the roller lifting mechanism to intermittently raise the sampling tube (1), and at the same time intermittently drives the lateral driving mechanism to intermittently insert the probe (2) into the sampling tube (1) to realize the pH measurement of the soil at different depths.

Images