A kind of saline-alkali soil experimental cultivation device

Abstract

The application relates to a kind of salt alkali land experimental ploughing devices, belong to agricultural equipment technical field.A kind of salt alkali land experimental ploughing device includes mounting bracket, drive mechanism, harrowing assembly and first elastic member.Drive mechanism is arranged in mounting bracket, drive mechanism has multiple first protrusions protruding from the outer circumferential side of drive mechanism.Harrowing assembly is coaxially rotatably sleeved outside drive mechanism, and harrowing assembly has multiple second protrusions protruding from the inner circumferential side of harrowing assembly.Multiple first protrusions and multiple second protrusions are sequentially spaced along the circumference of drive mechanism. Along the circumference of drive mechanism, first elastic member is located between first protrusion and second protrusion, and the two ends of first elastic member respectively abut against first protrusion and second protrusion. Drive mechanism rotates around rotation axis to compress first elastic member and drive harrowing assembly to rotate.

Description

Technical Field

[0001] This invention belongs to the field of agricultural equipment technology, and specifically relates to a tillage device for experimental saline-alkali land. Background Technology

[0002] Saline-alkali land typically refers to soil with excessively high salt and alkalinity. The high salt and alkali content affects soil structure, leading to compacted soil and a harder texture. Large machinery is generally not used for experimental cultivation of saline-alkali land. Therefore, to facilitate excavation during experiments, the blades used for cultivation are often made sharper to improve efficiency. However, saline-alkali land often contains gravel and other debris, and the impact of the blade with this material carries the risk of chipping due to the significant driving force. Summary of the Invention

[0003] This invention provides a cultivation device for saline-alkali land experiments to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides a cultivation device for saline-alkali land experiments, comprising a mounting frame, a drive mechanism, a harrowing assembly, and a first elastic element. The drive mechanism is mounted on the mounting frame and has multiple first protrusions extending beyond its outer periphery. The harrowing assembly is coaxially and rotatably fitted around the drive mechanism and has multiple second protrusions extending beyond its inner periphery. The multiple first and second protrusions are sequentially spaced around the circumference of the drive mechanism. Along the circumference of the drive mechanism, the first elastic element is located between the first and second protrusions, with its two ends abutting against the first and second protrusions, respectively. The drive mechanism rotates about its rotation axis to compress the first elastic element and drive the harrowing assembly to rotate.

[0005] Through the above structure, the experimental tillage device for saline-alkali land provided by this invention can reduce the risk of damage to the blades when they collide with hard objects such as gravel. Specifically, when tilling saline-alkali land, a trolley or small vehicle can be used to move the mounting frame along the ground, simultaneously causing the drive mechanism to rotate. This rotates the first protrusion, which in turn drives the first elastic member and the second protrusion. Due to the reaction force from the ground, the first and second protrusions compress the first elastic member, ensuring that the pushing force on the tillage component is equal to the elastic force of the first elastic member. This makes the pushing force on the tillage component equal to the force required to break the ground. When in contact with hard debris, the first elastic member is gradually compressed, increasing the pushing force on the tillage component and consequently increasing the impact force. This reduces the risk of damage to the blades of the tillage component due to excessive instantaneous impact force.

[0006] Optionally, the drive mechanism includes a rotating shaft, a swashplate, a rotating cylinder, and a drive assembly. Both ends of the rotating shaft are respectively mounted on a mounting bracket, and the axis of the rotating shaft coincides with the rotation axis. The swashplate is located at one end of the rotating shaft. The rotating cylinder is rotatably fitted onto the rotating shaft, and the end of the swashplate facing the rotating cylinder has a first guide surface. The first guide surface forms an angle with the rotation axis, and a first protrusion is located on the rotating cylinder. One end of the drive assembly is slidably mounted on the rotating cylinder along the rotation axis, and the other end abuts against the first guide surface. The drive assembly extends relative to the rotating cylinder and slides relative to the first guide surface to drive the rotating cylinder to rotate. This converts the linear motion of the drive assembly along the rotation axis into the motion of the rotating cylinder, reducing kinetic energy conversion and lowering the size of the device.

[0007] Optionally, the drive assembly includes a first clamping plate, a second clamping plate, a base, and a telescopic rod. The first clamping plate is disposed on the swashplate and parallel to the first guide surface. The second clamping plate is rotatably sleeved on the rotating shaft and parallel to the first guide surface; the rotation axis of the second clamping plate should be perpendicular to the first guide surface. Along the rotation axis, a portion of the base is clamped between the first guide surface and the second clamping plate, and a portion of the second clamping plate is clamped between the portions of the first clamping plate and the base. One end of the telescopic rod is slidably disposed on the rotating cylinder along the rotation axis, and the other end passes through the second clamping plate and is movably disposed on the base. Multiple telescopic rods and bases are disposed around the rotation axis. The design of the first and second clamping plates structurally restricts the base, ensuring that the base remains in contact with the first guide surface when the telescopic rod retracts relative to the rotating cylinder.

[0008] Optionally, the drive mechanism further includes a liquid distribution plate, sleeved on the rotating shaft and located at the end of the rotating drum away from the swashplate. The liquid distribution plate has two liquid distribution chambers respectively connected to the inlet and outlet flow channels. A hydraulic chamber corresponding to the telescopic rod is provided on the rotating drum. One end of the telescopic rod is located within the hydraulic chamber. The rotating drum rotates around its axis of rotation, causing the hydraulic chamber to alternately connect with the two liquid distribution chambers. Fluid entering the hydraulic chamber causes the telescopic rod to extend relative to the rotating drum, and fluid leaving the hydraulic chamber causes the telescopic rod to retract relative to the rotating drum.

[0009] Optionally, the tillage device also includes a reversing valve. The reversing valve is sleeved on the rotating shaft and located at the end of the dispensing plate away from the rotating drum. The reversing valve has a first chamber communicating with the inlet flow channel and a second chamber communicating with the outlet flow channel. The reversing valve is configured to rotate about the rotation axis between a first position and a second position. The two dispensing chambers are a first dispensing chamber and a second dispensing chamber, respectively. When the reversing valve is in the first position, the first chamber and the first dispensing chamber are connected, and the second chamber and the second dispensing chamber are connected. When the reversing valve is in the second position, the first chamber and the second dispensing chamber are connected, and the second chamber and the first dispensing chamber are connected. The design of the reversing valve allows the operator to rotate the drum in the opposite direction about the rotating shaft according to the actual situation, so that the harrowing assembly can sift out debris from the soil.

[0010] Optionally, the directional valve has a first region and a second region distributed along the rotation axis. The dispensing disc has a limiting portion surrounding the periphery of the first region along the rotation axis, and the directional valve has a third protrusion protruding from the first region. The tillage device also includes a second elastic member, one end of which is disposed on one side of the limiting portion distributed circumferentially along the directional valve, and the other end abutting against the third protrusion. The second elastic member provides an elastic force to drive the directional valve to a first position. The design of the third protrusion, the limiting portion, and the second elastic member prevents the directional valve from excessively rotating about the rotation axis, thereby disengaging the directional valve from control.

[0011] Optionally, the tillage device further includes an adjusting assembly, a locking member, a third elastic member, and an abutment member. The adjusting assembly is disposed on the inner circumference of the harrowing assembly and configured to reciprocate between a third position and a fourth position radially along the harrowing assembly. The locking member engages with the adjusting assembly so that the adjusting assembly is in the third position. A third elastic member, located radially along the harrowing assembly between the adjusting assembly and the inner circumference of the harrowing assembly, provides an elastic force to drive the adjusting assembly to the fourth position. A second protrusion has a first portion extending away from the swashplate and beyond the first protrusion along the axis of rotation, and one end of the abutment member is disposed in the first portion. The other end of the abutment member extends about the circumference of the dispensing pan. Movement of the first protrusion relative to the second protrusion causes the abutment member to engage with the locking member and causes the locking member to elastically deform away from the adjusting assembly. A reversing valve has a fourth protrusion protruding from the second region. The adjusting assembly is in the fourth position to drive the fourth protrusion to rotate about the axis of rotation and to drive the reversing valve to compress the second elastic member and rotate to the second position.

[0012] Optionally, the adjusting assembly includes a guide member and a guide plate. One end of the guide member is movably disposed on the inner circumference of the raking assembly along the radial direction. A third elastic member is sleeved on the outside of the guide member, and the guide plate is disposed at the other end of the guide plate. The guide plate has a second guide surface facing the fourth protrusion. When the adjusting assembly is in the fourth position, the distance between the second guide surface and the rotation axis gradually increases along the direction from the first position to the second position.

[0013] Optionally, the fourth protrusion has a third guide surface located on the side of the fourth protrusion close to the second elastic member. Along the direction from the second position to the first position, the distance between the third guide surface and the rotation axis gradually increases.

[0014] Optionally, the raking assembly includes a sleeve and raking elements. The sleeve is rotatably fitted onto the drive mechanism, and the second protrusion is located on the inner circumference of the sleeve. One end of the raking element is located on the outer circumference of the sleeve, and the other end extends radially along the sleeve. Multiple raking elements are arranged at intervals along the rotation axis. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a cultivation device for saline-alkali land experiments provided in an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of a cultivation device for saline-alkali land experiments in the direction of A.

[0018] Figure 3 For along Figure 2 A cross-sectional view obtained after cutting along the BB path;

[0019] Figure 4 This is a cross-sectional view of a cultivation device for saline-alkali land that rotates along the W2 direction, provided in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the drive mechanism provided in an embodiment of the present invention;

[0021] Figure 6 For along Figure 5 The sectional view obtained after cutting along the C1-C1 path;

[0022] Figure 7 For along Figure 5 The sectional view obtained after cutting along the C2-C2 path;

[0023] Figure 8 For along Figure 5 Enlarged view of a section at C3;

[0024] Figure 9 Exploded view of the liquid preparation tray and rotating drum provided in the embodiments of the present invention;

[0025] Figure 10 This is a schematic diagram of the structure of the liquid dispensing tray and rotating drum provided in an embodiment of the present invention;

[0026] Figure 11 Exploded view of the liquid dispensing tray, rotating drum, and reversing valve provided in the embodiments of the present invention;

[0027] Figure 12 A schematic diagram of the structure of the liquid distribution plate, the rotating drum, and the reversing valve when in the first position, provided for an embodiment of the present invention;

[0028] Figure 13A schematic diagram of the liquid distribution plate, rotating drum, and reversing valve in the second position provided for an embodiment of the present invention;

[0029] Figure 14 This is a schematic diagram of the structure of the harrowing assembly provided in an embodiment of the present invention;

[0030] Figure 15 A cross-sectional view of a tillage device for saline-alkali land experiment provided in an embodiment of the present invention at the contact point along the rotation axis;

[0031] Figure 16 This is a cross-sectional view of a saline-alkali land experimental tillage device along the rotation axis at the adjustment component, provided in an embodiment of the present invention.

[0032] Figure 17 For along Figure 16 Enlarged view of a section at point D.

[0033] In the picture:

[0034] 1-Mounting bracket; 11-Inlet channel; 12-Outlet channel;

[0035] 2-Drive mechanism; 2A-First protrusion; 2B-Abutting part;

[0036] 21-Shaft;

[0037] 22-Swashplate; 22A-First guide surface;

[0038] 23-Rotating drum; 231-Hydraulic chamber; 232-Infusion channel;

[0039] 24-Drive assembly; 241-First clamping plate; 242-Second clamping plate; 243-Base; 244-Telescopic rod;

[0040] 25-Dispensing tray; 251-Dispensing chamber; 251A-First dispensing chamber; 251B-Second dispensing chamber; 252-Limiting part; 253-Second guide rod; 254-Second elastic element;

[0041] 26-Reversing valve; 261-First cavity; 261A-First fluid passage; 262-Second cavity; 262A-Second fluid passage; 263-Third protrusion; 264-Fourth protrusion; 264A-Third guide surface;

[0042] 3-Harrowing assembly; 3A-Second protrusion; 31-Sleeve; 32-Harrowing component; 33-Adjusting assembly; 331-Guide component; 332-Guide plate; 332A-Second guide surface; 34-Snap-fit ​​component;

[0043] 4-First elastic element;

[0044] P - Rotation axis. Detailed Implementation

[0045] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0046] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Example

[0050] Saline-alkali land typically refers to soil with excessively high salt and alkalinity. The high salt and alkali content affects soil structure, leading to compacted soil and a harder texture. Large machinery is generally not used for experimental cultivation of saline-alkali land. Therefore, to facilitate excavation during experiments, the blades used for cultivation are often made sharper to improve efficiency. However, saline-alkali land often contains gravel and other debris, and the impact of the blade with this material carries the risk of chipping due to the significant driving force.

[0051] To solve the above technical problems, such as Figure 1 , Figure 2 and Figure 3 as well as Figure 4 As shown. The present invention provides a tillage device for experimental saline-alkali land, comprising a mounting frame 1, a drive mechanism 2, a harrowing assembly 3, and a first elastic element 4.

[0052] The mounting frame 1 can connect the drive unit and the small carrier, so that the operator can drive the drive mechanism 2 and the harrowing assembly 3 to move through the carrier.

[0053] The drive mechanism 2 is mounted on the mounting bracket 1. The drive mechanism 2 can be the output end of a conventional motor or electric motor. The drive mechanism 2 has a plurality of first protrusions 2A protruding from the outer periphery of the drive mechanism 2.

[0054] The harrowing assembly 3 is coaxially and rotatably fitted onto the drive mechanism 2. The harrowing assembly 3 has a plurality of second protrusions 3A protruding from its inner circumference. The plurality of first protrusions 2A and the plurality of second protrusions 3A are distributed sequentially at intervals around the circumference of the drive mechanism 2. Understandably, the inner wall of the harrowing assembly 3 should abut against the side of the first protrusion 2A away from the outer circumference of the drive mechanism 2, and / or, the second protrusions 3A abut against the outer wall of the drive mechanism 2 other than the first protrusion 2A, so that the harrowing assembly 3 and the drive mechanism 2 are coaxially arranged.

[0055] Along the circumferential direction of the drive mechanism 2, the first elastic element 4 is located between the first protrusion 2A and the second protrusion 3A, with both ends of the first elastic element 4 abutting against the first protrusion 2A and the second protrusion 3A respectively. Optionally, the first elastic element 4 can be a spring, and the drive mechanism 2 can also be provided with a first guide rod extending circumferentially, with one end of the first guide rod disposed on the side of the first protrusion 2A facing the second protrusion 3A, and the second protrusion 3A can slide relative to the first guide rod, with the first elastic element 4 sleeved on the first guide rod.

[0056] The drive mechanism 2 rotates around the rotation axis P to compress the first elastic element 4 and drive the harrowing assembly 3 to rotate.

[0057] Through the above structure, the experimental cultivation device for saline-alkali land provided by the present invention can reduce the risk of damage to the blade when it collides with hard objects such as gravel. Specifically, when cultivating saline-alkali land, the mounting frame 1 can be moved along the ground by a cart or small vehicle, while the drive mechanism 2 rotates. Due to the resistance of the ground and the friction between the harrowing assembly 3 and the drive mechanism 2, the harrowing assembly 3 remains stationary relative to the drive mechanism 2. For example, referring to... Figure 3 and Figure 4When the drive mechanism 2 rotates along the W1 direction, the first elastic member 4 located between adjacent first protrusions 2A and second protrusions 3A along the W1 direction is compressed; when the drive mechanism 2 rotates along the W2 direction, the first elastic member 4 located between adjacent first protrusions 2A and second protrusions 3A along the W2 direction is compressed. When the elastic force provided by the first elastic member 4 is greater than the sum of the resistance of the ground and the frictional force between the harrowing assembly 3 and the drive mechanism 2, the harrowing assembly 3 rotates to cultivate the saline-alkali land. This makes the pushing force on the harrowing assembly 3 equal to the force required to break the ground. When in contact with hard debris, the first elastic member 4 is gradually compressed, thereby gradually increasing the pushing force on the harrowing assembly 3, and thus gradually increasing the impact force on the harrowing assembly 3 when in contact with debris. This reduces the risk of damage to the blades of the harrowing assembly 3 due to excessive instantaneous impact force.

[0058] Based on the above, in order for the drive mechanism 2 to rotate around the rotation axis P, refer to... Figures 4-7 The drive mechanism 2 includes a rotating shaft 21, a swashplate 22, a rotating cylinder 23, and a drive assembly 24. Both ends of the rotating shaft 21 are respectively mounted on the mounting bracket 1, and the axis of the rotating shaft 21 coincides with the rotation axis P. The swashplate 22 is located at one end of the rotating shaft 21. The swashplate 22 is fixed relative to the mounting bracket 1 and the rotating shaft 21. The rotating cylinder 23 is rotatably fitted onto the rotating shaft 21, and the end of the swashplate 22 facing the rotating cylinder 23 has a first guide surface 22A. The first guide surface forms an angle with the rotation axis P, and a first protrusion 2A is located on the rotating cylinder 23. One end of the drive assembly 24 is slidably mounted on the rotating cylinder 23 along the rotation axis P, and the other end abuts against the first guide surface 22A. The drive assembly 24 extends relative to the rotating cylinder 23 and slides relative to the first guide surface 22A to drive the rotating cylinder 23 to rotate.

[0059] Specifically, refer to Figure 6 and Figure 7 .when Figure 6 When the drive assembly 24 on one side extends relative to the rotating drum 23 along the N1 direction, the drive assembly 24 slides along the first guide surface 22A, thereby causing the drive assembly 24 to rotate along the W2 direction, which in turn causes the rotating drum 23 to rotate along the W2 direction. Figure 7 The drive assembly 24 on one side shown retracts relative to the rotating drum 23 along the N2 direction to prevent... Figure 7 The drive assembly 24 on one side interferes with the rotation of the drum 23 along the W2 direction. When Figure 7 When the drive assembly 24 on one side extends relative to the rotating drum 23 along the N1 direction, the drive assembly 24 slides along the first guide surface 22A, thereby causing the drive assembly 24 to rotate along the W1 direction, which in turn causes the rotating drum 23 to rotate along the W1 direction. Figure 6 The drive assembly 24 on one side shown retracts relative to the rotating drum 23 along the N2 direction to prevent... Figure 6The drive assembly 24 on one side interferes with the rotation of the rotating drum 23 along the W1 direction. In this way, the linear motion of the drive assembly 24 along the rotation axis P can be converted into the motion of the rotating drum 23, reducing kinetic energy conversion and lowering the size of the device.

[0060] Based on the above, and referring to Figures 5-8 The drive assembly 24 includes a first clamping plate 241, a second clamping plate 242, a base 243, and a telescopic rod 244. The first clamping plate 241 is disposed on the swashplate 22 and parallel to the first guide surface 22A. The second clamping plate 242 is rotatably sleeved on the rotating shaft 21, and the rotation axis of the second clamping plate 242 should be perpendicular to and parallel to the first guide surface 22A. Understandably, the first clamping plate 241 is fixed relative to the swashplate 22 and the mounting bracket 1, and the second clamping plate 242 can rotate coaxially relative to the first clamping plate 241, with the rotation axis of the second clamping plate 242 perpendicular to the first guide surface 22A.

[0061] Along the rotation axis P, a portion of the base 243 is sandwiched between the first guide surface 22A and the second clamping plate 242, while a portion of the second clamping plate 242 is sandwiched between a portion of the first clamping plate 241 and a portion of the base 243. One end of the telescopic rod 244 is slidably mounted on the rotating cylinder 23 along the rotation axis P, and the other end passes through the second clamping plate 242 and is movably mounted on the base 243. Multiple telescopic rods 244 and bases 243 are arranged around the rotation axis P. Optionally, one end of the telescopic rod 244 is spherical, and the base 243 has a recess to accommodate the spherical shape; that is, the telescopic rod 244 and the base 243 can be connected using a method similar to that of a universal ball joint.

[0062] Specifically, refer to Figure 6 and Figure 7 .when Figure 6 When the telescopic rod 244 on one side extends relative to the rotating cylinder 23 along the N1 direction, the telescopic rod 244 applies pressure to the base 243 along the N1 direction. This pressure generates a component force on the base 243 parallel to the first guide surface 22A and away from the rotating cylinder 23, thereby causing... Figure 6 The base 243 on one side is parallel to the first guide surface 22A and moves away from the rotating cylinder 23, while... Figure 7 The drive assembly 24 on one side retracts relative to the rotating cylinder 23 along the N2 direction, so that the base 243 abuts against the second clamping plate 242, thereby causing the base 243 to exert pressure on the second clamping plate 242 in the N2 direction. This pressure generates a component force on the second clamping plate 242 parallel to the first guide surface 22A and close to the rotating cylinder 23, thereby causing... Figure 7 The base 243 on one side is parallel to the first guide surface 22A and approaches the rotating cylinder 23. Due to the restriction of the rotating cylinder 23 on the telescopic rod 244 and the base 243, the telescopic rod 244 and the base 243 rotate in the W2 direction, which in turn causes the rotating cylinder 23 to rotate in the W2 direction.

[0063] when Figure 7 When the telescopic rod 244 on one side extends relative to the rotating cylinder 23 along the N1 direction, the telescopic rod 244 applies pressure to the base 243 along the N1 direction. This pressure generates a component force on the base 243 parallel to the first guide surface 22A and away from the rotating cylinder 23, thereby causing... Figure 7 The base 243 on one side is parallel to the first guide surface 22A and moves away from the rotating cylinder 23, while... Figure 6 The drive assembly 24 on one side retracts relative to the rotating cylinder 23 along the N2 direction, so that the base 243 abuts against the second clamping plate 242, thereby causing the base 243 to exert pressure on the second clamping plate 242 in the N2 direction. This pressure generates a component force on the second clamping plate 242 parallel to the first guide surface 22A and close to the rotating cylinder 23, thereby causing... Figure 6 The base 243 on one side is parallel to the first guide surface 22A and approaches the rotating cylinder 23. Due to the restriction of the rotating cylinder 23 on the telescopic rod 244 and the base 243, the telescopic rod 244 and the base 243 rotate in the W1 direction, which in turn causes the rotating cylinder 23 to rotate in the W1 direction.

[0064] Based on the above, in order to make Figure 6 and Figure 7 The telescopic rods 244 on both sides can move along the N1 and N2 directions respectively. (Refer to...) Figure 9 and Figure 10 The drive mechanism 2 also includes a liquid distribution plate 25, which is sleeved on the rotating shaft 21. The liquid distribution chamber 251 is fixed relative to the rotating shaft 21 and located at the end of the rotating drum 23 away from the swashplate 22. The liquid distribution plate 25 has two liquid distribution chambers 251. The two liquid distribution chambers 251 are respectively connected to the inlet channel 11 and the outlet channel 12. It is understood that the inlet channel 11 and the outlet channel 12 can be mounted on the mounting bracket 1 and connected to the hydraulic pump. The rotating drum 23 has a hydraulic chamber 231 corresponding to the telescopic rod 244. One end of the telescopic rod 244 is located within the hydraulic chamber 231. The rotating drum 23 rotates around the rotation axis P, causing the hydraulic chamber 231 to alternately connect with the two liquid distribution chambers 251. Fluid enters the hydraulic chamber 231, causing the telescopic rod 244 to extend relative to the rotating drum 23; fluid leaves the hydraulic chamber 231, causing the telescopic rod 244 to retract relative to the rotating drum 23.

[0065] For example, the two dispensing chambers 251 can be oblong holes penetrating the dispensing plate 25 along the rotation axis P. Both dispensing chambers 251 extend circumferentially along the dispensing plate 25. For ease of description, the two dispensing chambers 251 are respectively named the first dispensing chamber 251A and the second dispensing chamber 251B. Understandably, the rotating drum 23 has a delivery channel 232 at one end near the dispensing plate 25, which is connected to the hydraulic chamber 231. The rotating drum 23 moves along the W1 or W2 direction to drive the delivery channel 232 to circulate sequentially with the first dispensing chamber 251A and the second dispensing chamber.

[0066] Specifically, the first liquid dispensing chamber 251A is connected to the liquid inlet channel 11 and Figure 7 The infusion channel 232 and hydraulic chamber 231 on one side are shown. The second liquid distribution chamber 251B is connected to the liquid outlet channel 12 and... Figure 6 Taking the infusion channel 232 and hydraulic chamber 231 on one side as an example, hydraulic oil enters through the inlet channel 11 and the first distribution chamber 251A. Figure 7 The infusion channel 232 and hydraulic chamber 231 on one side are shown to enable... Figure 7 The telescopic rod 244 on one side extends out of the hydraulic chamber 231 along the N1 direction, while... Figure 6 The hydraulic oil in the hydraulic chamber 231 on one side, as shown, exits from the outlet channel 12 through the delivery channel 232 and the second distribution channel 251B. This, in turn, allows... Figure 6 The telescopic rod 244 on one side retracts into the hydraulic chamber 231 along the N2 direction, thereby causing the rotating drum 23 to rotate along the W1 direction as described above. This allows... Figure 6 The telescopic rod 244 on one side shown approaches along the W1 direction. Figure 7 As shown on one side, and thus making Figure 7 The telescopic rod 244 on one side shown approaches along the W1 direction. Figure 6 As shown on one side, this causes the telescopic rod 244 to alternate. Figure 7 The side shown extends along the N1 direction and... Figure 6 The side shown retracts along the N2 direction, causing the drive mechanism 2 to rotate along the W1 direction.

[0067] Similarly, when the first liquid preparation chamber 251A is connected to the liquid outlet channel 12 and Figure 7 The infusion channel 232 and hydraulic chamber 231 on one side are shown. The second liquid distribution chamber 251B is connected to the inlet channel 11 and... Figure 6 The infusion channel 232 and hydraulic chamber 231 are shown on one side. The drive mechanism 2 will rotate in the W2 direction.

[0068] Based on the above, to facilitate control of the rotating drum 23 to be rotated in the W1 or W2 direction, the tillage device also includes a reversing valve 26. The reversing valve 26 is sleeved on the rotating shaft 21 and located at the end of the liquid distribution plate 25 away from the rotating drum 23. The reversing valve 26 has a first cavity 261 communicating with the inlet channel 11 and a second cavity 262 communicating with the outlet channel 12. The first cavity 261 and the second cavity 262 can be waist-shaped grooves extending circumferentially along the reversing valve 26, so that when the first cavity 261 and the second cavity 262 rotate around the rotation axis P in the W1 and W2 directions, respectively, the first cavity 261 and the second cavity 262 can still be connected to the inlet channel 11 and the outlet channel 12, respectively. A first liquid passage 261A extending through the reversing valve 26 in the rotation axis P direction is opened at the bottom of the first cavity 261, and a second liquid passage 262A extending through the reversing valve 26 in the rotation axis P direction is opened at the bottom of the second cavity 262. The reversing valve 26 is configured to rotate about a rotation axis P between a first position and a second position. Two dispensing chambers 251 are designated as a first dispensing chamber 251A and a second dispensing chamber 251B. When the reversing valve 26 is in the first position, the first chamber 261 is connected to the first dispensing chamber 251A, and the second chamber 262 is connected to the second dispensing chamber 251B. When the reversing valve 26 is in the second position, the first chamber 261 is connected to the second dispensing chamber 251B, and the second chamber 262 is connected to the first dispensing chamber 251A.

[0069] Specifically, refer to Figure 12 When the reversing valve 26 is in the first position, the first liquid passage 261A and the first liquid distribution chamber 251A are connected, thereby connecting the first chamber 261 with the first liquid distribution chamber 251A, and further connecting the inlet flow passage 11 with the first liquid distribution chamber 251A. At the same time, the second liquid passage 262A and the second liquid distribution chamber 251B are connected, thereby connecting the second chamber 262 with the second liquid distribution chamber 251B, and further connecting the outlet flow passage 12 with the second liquid distribution chamber 251B, so that the rotating drum 23 rotates in the W1 direction.

[0070] Reference Figure 13 When the reversing valve 26 is in the second position, the first liquid passage 261A and the second liquid distribution chamber 251B are connected, thereby connecting the first chamber 261 with the second liquid distribution chamber 251B, which in turn connects the inlet flow passage 11 with the second liquid distribution chamber 251B. At the same time, the second liquid passage 262A and the first liquid distribution chamber 251A are connected, thereby connecting the second chamber 262 with the first liquid distribution chamber 251A, which in turn connects the outlet flow passage 12 with the first liquid distribution chamber 251A, so that the rotating drum 23 rotates in the W2 direction.

[0071] Understandably, the reversing valve 26 rotates from the first position along the W2 direction to approach the second position. The reversing valve 26 rotates from the second position along the W1 direction to approach the first position. The first position and the second position are within a certain angular range. For example, when located within the first position range, the first liquid passage 261A is connected to the first liquid distribution chamber 251A, and the second liquid passage 262A is connected to the second liquid distribution chamber 251B.

[0072] Based on the above, the directional valve 26 has a first region and a second region distributed along the rotation axis P. The liquid distribution plate 25 has a limiting portion 252 surrounding the periphery of the first region along the rotation axis P, and the directional valve 26 has a third protrusion 263 protruding from the first region. The tillage device also includes a second elastic member 254, one end of which is disposed on one side of the limiting portion 252 distributed circumferentially along the directional valve 26, and the other end abutting against the third protrusion 263. The second elastic member 254 is used to provide elastic force to drive the directional valve 26 to the first position.

[0073] Optionally, the second elastic element 254 can be a spring, and the liquid distribution plate 25 can also be provided with a second guide rod 253 extending circumferentially, with the two ends of the second guide rod 253 respectively disposed on opposite sides of the limiting portion 252 distributed circumferentially along the liquid distribution plate 25. The third protrusion 263 can slide relative to the second guide rod 253, and the second elastic element 254 is sleeved on the second guide rod 253.

[0074] Specifically, the second elastic member 254 extends so that the third protrusion 263 tends to move in the W1 direction, thereby causing the reversing valve 26 to be in the first position, and the third protrusion 263 rotates in the W2 direction to compress the second elastic member 254, thereby causing the reversing valve 26 to be in the second position.

[0075] Thus, the third protrusion 263 and the limiting part 252 constitute a structural limit, and the design of the second elastic element 254 prevents the reversing valve 26 from rotating excessively around the rotation axis P.

[0076] Based on the above, and referring to Figures 14-17The tillage device also includes an adjusting assembly 33, a locking member 34, a third elastic member (not shown), and an abutment member 2B. The adjusting assembly 33 is disposed on the inner circumference of the harrowing assembly 3 and configured to reciprocate between a third position and a fourth position along the radial direction of the harrowing assembly 3. The locking member 34 engages with the adjusting assembly 33 so that the adjusting assembly 33 is in the third position. Along the radial direction of the harrowing assembly 3, the third elastic member (not shown) is located between the adjusting assembly 33 and the inner circumference of the harrowing assembly 3, and provides an elastic force to drive the adjusting assembly 33 to the fourth position. The second protrusion 3A has a first portion extending away from the swashplate 22 and beyond the first protrusion 2A in the direction of the rotation axis P, and one end of the abutment member 2B is disposed in the first portion. The other end of the abutment 2B extends around the circumference of the liquid distribution plate 25. The first protrusion 2A moves relative to the second protrusion 3A to drive the abutment 2B to abut against the locking member 34, and to drive the locking member 34 to elastically deform away from the adjusting assembly 33. The reversing valve 26 has a fourth protrusion 264 protruding from the second region. The adjusting assembly 33 is in the fourth position to drive the fourth protrusion 264 to rotate about the rotation axis P, and to drive the reversing valve 26 to compress the second elastic member 254 and rotate towards the second position.

[0077] Optionally, the adjusting component 33, the locking member 34, the third elastic member (not shown in the figure), and the abutment member 2B can be multiple components evenly distributed around the rotation axis P. The locking member 34 is an elastic member.

[0078] Specifically, refer to Figure 15 When encountering large debris that causes excessive resistance from the ground to the raking assembly 3, the first protrusion 2A over-compresses the first elastic member 4, causing the first protrusion 2A to move excessively relative to the second protrusion 3A2 along the W1 direction. This causes the abutment member 2B to abut against the locking member 34 along the W1 direction, thus preventing the locking member 34 from abutting against the adjusting assembly 33. At this point, the adjusting assembly 33 is no longer fixed in the third position. Subsequently, the third elastic member (not shown in the figure) provides elastic force, causing the adjusting assembly 33 to move towards the fourth position along the N4 direction and abut against the fourth protrusion 264. This causes the fourth protrusion 264 to rotate about the rotation axis P along the W2 direction, driving the reversing valve 26 to compress the second elastic member 254 and rotate towards the second position.

[0079] As can be seen from the above, when the reversing valve 26 is in the second position, the rotating drum 23 rotates in the W2 direction, thereby causing the first protrusion 2A to rotate in the W2 direction, thus no longer compressing the first elastic member 4 located between the first protrusion 2A and the second protrusion 3A in the W1 direction, thereby reducing the risk of the first elastic member 4 being damaged by pressure.

[0080] It can be understood that the N4 and N5 directions are opposite and both are parallel to the axis of the harrowing component 3.

[0081] Based on the above, the section assembly includes a guide member 331 and a guide plate 332. One end of the guide member 331 is movably disposed on the inner circumference of the harrowing assembly 3 along the radial direction. A third elastic member (not shown in the figure) is sleeved on the outside of the guide member 331, and the guide plate 332 is disposed at the other end of the guide plate 332. The guide plate 332 has a second guide surface 332A facing the fourth protrusion 264. When the adjusting assembly 33 is in the fourth position, the distance between the second guide surface 332A and the rotation axis P gradually increases along the direction from the first position to the second position. That is, when the adjusting assembly 33 is in the fourth position, the distance between the second guide surface 332A and the rotation axis P gradually increases along the W2 direction.

[0082] Understandably, the cross-section of the guide 331 can be square, and a blind hole is provided on the inner wall of the raking assembly 3 for the guide 331 to pass through, with one end of the guide 331 inserted into the blind hole.

[0083] Specifically, refer to Figure 16 and Figure 17 When the adjusting component 33 is in the fourth position, the distance between the second guide surface 332A and the rotation axis P gradually increases along the W2 direction. Taking the fourth protrusion 264 in the first position and within the coverage area of ​​any guide plate 332 as an example, when the guide plate 332 moves along the N4 direction to the fourth position, the second guide surface 332A approaches the fourth protrusion 264 in the first position along the N4 direction, causing the fourth protrusion 264 to rotate along the W2 direction, and causing the third protrusion 263 to compress the second elastic member 254, thereby causing the reversing valve 26 to be in the second position, so that the rotating drum 23 and the rake assembly 3 rotate along the W2 direction. At this time, the first boss rotates relative to the second boss along the W2 direction, thereby causing the abutment member 2B and the locking member 34 to no longer abut, thus causing the locking member 34 to elastically reset.

[0084] Simultaneously, the guide plate 332 rotates along the W2 direction, causing the fourth protrusion 264 to continue rotating along the W2 direction, and causing the third protrusion 263 to further compress the second elastic member 254. When the elastic force provided by the second elastic member 254 is large, the third protrusion 263 is fixed relative to the liquid distribution plate 25 and the rotating shaft 21. At this time, the second guide surface 332A will slide relative to the fourth protrusion 264 along the W2 direction, so that the guide plate 332 moves towards the third position along the N5 direction, thereby compressing the third elastic member (not shown in the figure). It is then fixed in the third position by the snap-fit ​​member 34.

[0085] It should be noted that the snap-fit ​​part 34 and the fourth protrusion 264 are distributed along the rotation axis P, that is, the fourth protrusion 264 will not come into contact with the snap-fit ​​part 34 when it rotates.

[0086] Based on the above, the fourth protrusion 264 has a third guide surface 264A. The third guide surface 264A is located on the side of the fourth protrusion 264 near the second elastic member 254. Along the direction from the second position to the first position, the distance between the third guide surface 264A and the rotation axis P gradually increases. That is, along the W1 direction, the distance between the third guide surface 264A and the rotation axis P gradually increases.

[0087] Specifically, refer to Figure 16 and Figure 17 As the distance between the third guide surface 264A and the rotation axis P gradually increases along the W1 direction, taking the fourth protrusion 264 located in the first position and between the coverage areas of any two guide plates 332 as an example, the raking assembly 3 is pushed to move forcibly along the W1 direction so that the guide plate 332 abuts against the third guide surface 264A. At this time, since the third protrusion 263 abuts against the limiting part 252, the fourth protrusion 264 will not move along the W1 direction. And the guide plate 332 moves relative to the third guide surface 264A along the W1 direction so that the guide plate 332 moves towards the third position along the N5 direction to compress the third elastic member (not shown in the figure). Since the abutting member 2B and the snap-fit ​​member 34 are still abutting at this time, the guide plate 332 will not be fixed by the snap-fit ​​member 34. Subsequently, the fourth protrusion 264 is within the coverage area of ​​any guide plate 332.

[0088] Based on the above, the harrowing assembly 3 includes a sleeve 31 and harrowing elements 32. The sleeve 31 is rotatably fitted onto the drive mechanism 2, and the second protrusion 3A is located on the inner circumference of the sleeve 31. One end of the harrowing element 32 is located on the outer circumference of the sleeve 31, and the other end extends radially along the sleeve 31. Multiple harrowing elements 32 are arranged at intervals along the rotation axis P.

[0089] Optionally, the size of the raking member 32 along the rotation axis P gradually decreases along the W1 direction, and it is located away from the center of the sleeve 31 along the rotation axis P. The raking member 32 is distributed along the W1 direction.

[0090] Specifically, when the sleeve 31 is driven to rotate in the W2 direction, large pieces of debris will move along the N3 direction along the harrowing member 32 to be located on both sides of the cultivated land.

[0091] In summary, during the cultivation of saline-alkali land...

[0092] As the second elastic element 254 provides elastic force to the third protrusion 263 so that the reversing valve 26 is in the first position, the first liquid passage 261A and the first liquid distribution chamber 251A are connected, thereby connecting the first cavity 261 with the first liquid distribution chamber 251A, and further connecting the inlet flow channel 11 with the first liquid distribution chamber 251A. At the same time, the second liquid passage 262A and the second liquid distribution chamber 251B are connected, thereby connecting the second cavity 262 with the second liquid distribution chamber 251B, and further connecting the outlet flow channel 12 with the second liquid distribution chamber 251B.

[0093] Hydraulic oil enters through inlet channel 11 and first distribution chamber 251A. Figure 7 The infusion channel 232 and hydraulic chamber 231 on one side are shown to enable... Figure 7 The telescopic rod 244 on one side extends out of the hydraulic chamber 231 along the N1 direction, while... Figure 6 The hydraulic oil in the hydraulic chamber 231 on one side, as shown, exits from the outlet channel 12 through the delivery channel 232 and the second distribution channel 251B. This, in turn, allows... Figure 6 The telescopic rod 244 on one side retracts into the hydraulic chamber 231 along the N2 direction.

[0094] when Figure 7 When the telescopic rod 244 on one side extends relative to the rotating cylinder 23 along the N1 direction, the telescopic rod 244 applies pressure to the base 243 along the N1 direction. This pressure generates a component force on the base 243 parallel to the first guide surface 22A and away from the rotating cylinder 23, thereby causing... Figure 7 The base 243 on one side is parallel to the first guide surface 22A and moves away from the rotating cylinder 23, while... Figure 6 The drive assembly 24 on one side retracts relative to the rotating cylinder 23 along the N2 direction, so that the base 243 abuts against the second clamping plate 242, thereby causing the base 243 to exert pressure on the second clamping plate 242 in the N2 direction. This pressure generates a component force on the second clamping plate 242 parallel to the first guide surface 22A and close to the rotating cylinder 23, thereby causing... Figure 6 The base 243 on one side is parallel to the first guide surface 22A and approaches the rotating cylinder 23. Due to the restriction of the rotating cylinder 23 on the telescopic rod 244 and the base 243, the telescopic rod 244 and the base 243 rotate in the W1 direction, which in turn causes the rotating cylinder 23 to rotate in the W1 direction.

[0095] This causes the first protrusion 2A to rotate along the W1 direction. Due to the resistance of the ground and the friction between the harrowing assembly 3 and the drive mechanism 2, the harrowing assembly 3 remains stationary relative to the drive mechanism 2. For example, referring to... Figure 3 and Figure 4When the drive mechanism 2 rotates along the W1 direction, the first elastic member 4 located between the adjacent first protrusion 2A and second protrusion 3A along the W1 direction is compressed. When the elastic force provided by the first elastic member 4 is greater than the sum of the resistance of the ground and the frictional force between the harrowing assembly 3 and the drive mechanism 2, the harrowing assembly 3 rotates to cultivate the saline-alkali land. This makes the pushing force on the harrowing assembly 3 equal to the force required to break the ground.

[0096] When encountering large debris in saline-alkali soil, the resistance from the ground increases for the harrowing assembly 3, at which point the harrowing assembly 3 remains stationary relative to the rotating drum 23. The first protrusion 2A excessively compresses the first elastic member 4, causing the first protrusion 2A to move excessively relative to the second protrusion 3A2 along the W1 direction. This causes the abutment member 2B to abut against the locking member 34 along the W1 direction, thus preventing the locking member 34 from abutting against the adjusting assembly 33. At this point, the adjusting assembly 33 is no longer fixed in the third position. Subsequently, the third elastic member (not shown in the figure) provides elastic force, causing the adjusting assembly 33 to move towards the fourth position along the N4 direction.

[0097] Taking the fourth protrusion 264 located in the first position and between the coverage areas of any two guide plates 332 as an example, the guide plate 332 abuts against the third guide surface 264A. At this time, since the third protrusion 263 abuts against the limiting part 252, the fourth protrusion 264 will not move along the W1 direction. The guide plate 332 then moves relative to the third guide surface 264A along the W1 direction, causing the guide plate 332 to move towards the third position along the N5 direction to compress the third elastic member (not shown in the figure). Since the abutting member 2B and the locking member 34 are still abutting at this time, the guide plate 332 will not be fixed by the locking member 34. Subsequently, the fourth protrusion 264 is located within the coverage area of ​​any guide plate 332.

[0098] Taking the fourth protrusion 264 located in the first position and within the coverage area of ​​any guide plate 332 as an example, when the guide plate 332 moves along the N4 direction to the fourth position, the second guide surface 332A approaches the fourth protrusion 264 located in the first position along the N4 direction, causing the fourth protrusion 264 to rotate along the W2 direction, and causing the third protrusion 263 to compress the second elastic member 254, thereby causing the reversing valve 26 to be located in the second position. At this time, the first liquid channel 261A and the second liquid distribution chamber 251B are connected, thereby connecting the first cavity 261 with the second liquid distribution chamber 251B, and thus connecting the inlet flow channel 11 with the second liquid distribution chamber 251B. At the same time, the second liquid channel 262A and the first liquid distribution chamber 251A are connected, thereby connecting the second cavity 262 with the first liquid distribution chamber 251A, and thus connecting the outlet flow channel 12 with the first liquid distribution chamber 251A.

[0099] Hydraulic oil enters through inlet channel 11 and first distribution chamber 251A. Figure 6The infusion channel 232 and hydraulic chamber 231 on one side are shown to enable... Figure 6 The telescopic rod 244 on one side extends out of the hydraulic chamber 231 along the N1 direction, while... Figure 7 The hydraulic oil in the hydraulic chamber 231 on one side, as shown, exits from the outlet channel 12 through the delivery channel 232 and the second distribution channel 251B. This, in turn, allows... Figure 7 The telescopic rod 244 on one side retracts into the hydraulic chamber 231 along the N2 direction.

[0100] when Figure 6 When the telescopic rod 244 on one side extends relative to the rotating cylinder 23 along the N1 direction, the telescopic rod 244 applies pressure to the base 243 along the N1 direction. This pressure generates a component force on the base 243 parallel to the first guide surface 22A and away from the rotating cylinder 23, thereby causing... Figure 6 The base 243 on one side is parallel to the first guide surface 22A and moves away from the rotating cylinder 23, while... Figure 7 The drive assembly 24 on one side retracts relative to the rotating cylinder 23 along the N2 direction, so that the base 243 abuts against the second clamping plate 242, thereby causing the base 243 to exert pressure on the second clamping plate 242 in the N2 direction. This pressure generates a component force on the second clamping plate 242 parallel to the first guide surface 22A and close to the rotating cylinder 23, thereby causing... Figure 7 The base 243 on one side is parallel to the first guide surface 22A and approaches the rotating cylinder 23. Due to the restriction of the rotating cylinder 23 on the telescopic rod 244 and the base 243, the telescopic rod 244 and the base 243 rotate in the W2 direction, which in turn causes the rotating cylinder 23 to rotate in the W2 direction.

[0101] This causes the first elastic member 4, located between adjacent first protrusion 2A and second protrusion 3A along the W2 direction, to be compressed, so that the rotating drum 23 and the raking assembly 3 rotate along W2.

[0102] When the sleeve 31 is driven to rotate in the W2 direction, large pieces of debris will move along the N3 direction along the harrowing member 32 to be located on both sides of the cultivated land.

[0103] At this time, the first boss rotates relative to the second boss in the W2 direction, which causes the abutment 2B and the locking member 34 to no longer abut, thereby causing the locking member 34 to elastically reset.

[0104] Simultaneously, the guide plate 332 rotates along the W2 direction, causing the fourth protrusion 264 to continue rotating along the W2 direction, and causing the third protrusion 263 to further compress the second elastic member 254. When the elastic force provided by the second elastic member 254 is large, the third protrusion 263 is fixed relative to the liquid distribution plate 25 and the rotating shaft 21. At this time, the second guide surface 332A will slide relative to the fourth protrusion 264 along the W2 direction, so that the guide plate 332 moves towards the third position along the N5 direction, thereby compressing the third elastic member (not shown in the figure). It is then fixed in the third position by the snap-fit ​​member 34.

[0105] Subsequently, as the second elastic element 254 provides elastic force to the third protrusion 263 to place the reversing valve 26 in the first position, the harrowing assembly 3 continues to rotate in the W1 direction.

[0106] In summary, the experimental tillage device for saline-alkali land provided by this invention can gradually increase the pushing force on the harrowing component 3 when it comes into contact with hard debris through the gradual compression of the first elastic element 4, thereby gradually increasing the impact force on the harrowing component 3 when it comes into contact with debris. This reduces the risk of damage to the blades of the harrowing component 3 due to excessive instantaneous impact force. Simultaneously, when encountering larger debris, the reversing valve 26 can trigger reverse rotation to reduce the risk of damage to the first elastic element 4. The reverse rotation can also dig out large pieces of debris in the saline-alkali land and pile them on both sides of the tillage for easy collection. The above description is merely a specific embodiment of this invention, but the scope of protection of this invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A tillage device for experimental use in saline-alkali land, characterized in that, include: Mounting rack; A drive mechanism is disposed on the mounting bracket, the drive mechanism having a plurality of first protrusions protruding from the outer peripheral side of the drive mechanism; A harrowing assembly is coaxially and rotatably sleeved outside the drive mechanism. The harrowing assembly has a plurality of second protrusions protruding from the inner circumference of the harrowing assembly. The plurality of first protrusions and the plurality of second protrusions are distributed sequentially at intervals around the circumference of the drive mechanism. A first elastic element is located between the first protrusion and the second protrusion along the circumferential direction of the driving mechanism. The two ends of the first elastic element abut against the first protrusion and the second protrusion, respectively. The driving mechanism rotates about the rotation axis to compress the first elastic element and drive the harrowing assembly to rotate. The drive mechanism includes: A rotating shaft has two ends respectively disposed on the mounting bracket, and the axis of the rotating shaft coincides with the rotation axis; A swashplate is disposed at one end of the rotating shaft; A rotating drum is rotatably fitted onto the rotating shaft. The end of the swashplate facing the rotating drum has a first guide surface. The first guide surface forms an angle with the rotation axis. The first protrusion is disposed on the rotating drum. A drive assembly is slidably disposed on the rotating drum at one end along the rotation axis and abuts against the first guide surface at the other end. The drive assembly extends relative to the rotating drum and slides relative to the first guide surface to drive the rotating drum to rotate. The driving component includes: A first clamping plate is disposed on the swashplate and is parallel to the first guide surface; The second clamping plate is rotatably sleeved on the rotating shaft and parallel to the first guide surface. The rotating shaft of the second clamping plate is perpendicular to the first guide surface. A base, along the rotation axis, has a portion sandwiched between the first guide surface and the second clamping plate, and a portion of the second clamping plate sandwiched between the first clamping plate and a portion of the base; A telescopic rod, one end of which is slidably disposed on the rotating cylinder along the rotation axis, and the other end passing through the second clamping plate and movably disposed on the base; the telescopic rod and the base are multiple rods arranged around the rotation axis. The drive mechanism also includes a liquid distribution plate, which is sleeved on the rotating shaft and located at the end of the rotating cylinder away from the inclined plate. The liquid distribution plate has two liquid distribution chambers that are respectively connected to the inlet flow channel and the outlet flow channel. The rotating drum has a hydraulic chamber corresponding to the telescopic rod. One end of the telescopic rod is located in the hydraulic chamber. The rotating drum rotates around the rotation axis to drive the hydraulic chamber to alternately communicate with the two liquid distribution chambers in sequence. Fluid enters the hydraulic chamber to drive the telescopic rod to extend relative to the rotating drum, and fluid leaves the hydraulic chamber to drive the telescopic rod to retract relative to the rotating drum.

2. The experimental cultivation device for saline-alkali land according to claim 1, characterized in that, The tillage device also includes: A reversing valve is sleeved on the rotating shaft and located at the end of the liquid distribution plate away from the rotating cylinder. The reversing valve has a first cavity communicating with the liquid inlet channel and a second cavity communicating with the liquid outlet channel. The reversing valve is configured to rotate about the rotation axis between a first position and a second position. The two liquid preparation chambers are designated as a first liquid preparation chamber and a second liquid preparation chamber. When the reversing valve is in the first position, the first cavity and the first liquid dispensing cavity are connected, and the second cavity and the second liquid dispensing cavity are connected. When the reversing valve is in the second position, the first cavity and the second liquid distribution cavity are connected, and the second cavity and the first liquid distribution cavity are connected.

3. The experimental cultivation device for saline-alkali land according to claim 2, characterized in that, The reversing valve has a first region and a second region distributed along the rotation axis direction; The liquid distribution plate has a limiting portion that is partially circumferentially arranged around the first region along the rotation axis, and the reversing valve has a third protrusion that protrudes from the first region. The tillage device further includes a second elastic element, one end of which is disposed on one side of the limiting portion distributed circumferentially along the reversing valve, and the other end abuts against the third protrusion. The second elastic element is used to provide elastic force to drive the reversing valve to move toward the first position.

4. The experimental cultivation device for saline-alkali land according to claim 3, characterized in that, The tillage device also includes: An adjustment component is disposed on the inner periphery of the harrowing component and configured to reciprocate between a third position and a fourth position along the radial direction of the harrowing component; A snap-fit ​​component is used to snap into the adjustment assembly so that the adjustment assembly is in a third position; A third elastic element is located radially along the harrowing assembly, between the adjusting assembly and the inner circumferential side of the harrowing assembly, and is used to provide an elastic force to drive the adjusting assembly to the fourth position. The abutment has a second protrusion that extends beyond a first portion of the first protrusion in a direction away from the swashplate and along the axis of rotation. One end of the abutment is disposed in the first portion, and the other end of the abutment extends around the circumference of the dispensing tray. The first protrusion moves relative to the second protrusion to drive the abutment to abut against the locking member and to drive the locking member to elastically deform in a direction away from the adjusting assembly. The reversing valve has a fourth protrusion protruding from the second region. The adjusting assembly is located in a fourth position to drive the fourth protrusion to rotate about the rotation axis and to drive the reversing valve to compress the second elastic element and rotate toward the second position.

5. The experimental cultivation device for saline-alkali land according to claim 4, characterized in that, The adjustment assembly includes a guide member and a guide plate. One end of the guide member is movably disposed on the inner circumference of the harrowing assembly along the radial direction of the harrowing assembly. The third elastic member is sleeved on the outside of the guide member, and the guide plate is disposed at the other end of the guide plate. The reversing valve has a fourth protrusion protruding from the second region, and the guide plate has a second guide surface facing the fourth protrusion. When the adjusting component is in the fourth position, the distance between the second guide surface and the rotation axis gradually increases along the direction from the first position to the second position.

6. The experimental cultivation device for saline-alkali land according to claim 5, characterized in that, The fourth protrusion has a third guide surface, which is located on the side of the fourth protrusion near the second elastic member. Along the direction from the second position to the first position, the distance between the third guide surface and the rotation axis gradually increases.

7. A cultivation device for saline-alkali land experiments according to any one of claims 1-6, characterized in that, The tilling assembly includes: A sleeve is rotatably fitted outside the drive mechanism, and the second protrusion is located on the inner circumferential side of the sleeve; The raking component has one end located on the outer periphery of the sleeve and the other end extending radially along the sleeve. The raking components are multiple components arranged at intervals along the rotation axis.

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