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CN-121970670-A - Central support shaft type lower margin arm sprinkler

CN121970670ACN 121970670 ACN121970670 ACN 121970670ACN-121970670-A

Abstract

The application discloses a central support shaft type foot arm sprinkler, and relates to the technical field of agricultural irrigation equipment. The sprinkler comprises a sprinkler body and a foot arm span body, wherein the sprinkler body and the foot arm span body are connected through a floating hinge mechanism. The floating hinge mechanism realizes the rotation of the foot arm span body in the horizontal direction and the adaptation of gradient floating in the vertical direction. The tail end of the foot arm span body is provided with a tail end driving tower car, and the induction guiding unit is used for detecting the ground magnetic cable so as to follow the path. In addition, the mechanical linkage feedback mechanism changes a mechanical trigger control signal according to the included angle between the sprinkler body and the foot arm span body, and adjusts the speed of the tower crane to keep coordination. The application improves the structural reliability and the operation precision of the equipment under complex terrains, realizes the efficient coverage of irregular plots, and is particularly suitable for agricultural irrigation operation of uneven plots such as hills, terraces and the like.

Inventors

  • LI HONGMEI
  • ZHOU CHUANGUO
  • CHEN YAJUN
  • WU HUI
  • DONG GUOLIANG

Assignees

  • 沃达尔（天津）股份有限公司

Dates

Publication Date
20260505
Application Date
20260211

Claims (10)

  1. 1. The utility model provides a center pivot formula lower margin arm sprinkling irrigation machine, includes sprinkling irrigation machine main part (10) and connect in terminal lower margin arm span body (20) of sprinkling irrigation machine main part (10), its characterized in that lower margin arm sprinkling irrigation machine still includes: The floating hinge mechanism (30) comprises a connecting frame (31) and a floating hinge assembly, wherein the floating hinge assembly is arranged between the connecting frame (31) and the sprinkler body (10) and/or at the joint of the connecting frame (31) and the lower arm span body (20), and is configured to enable the lower arm span body (20) and the sprinkler body (10) to rotate relatively in the horizontal direction and allow the lower arm span body (20) to generate gradient-adaptive floating displacement relative to the sprinkler body (10) in the vertical direction; the tail end driving tower crane (40) is arranged at the tail end of the foot arm span body (20) and is used for driving the foot arm span body (20) to move along a physical guide path preset on the ground; The mechanical linkage feedback mechanism (50) comprises a first connecting rod assembly (51) and a first control box (52), wherein the first connecting rod assembly (51) is arranged between the connecting frame (31) and the sprinkler body (10), the first connecting rod assembly (51) is configured to follow the change of a first horizontal included angle between the connecting frame (31) and the sprinkler body (10) to generate mechanical displacement, and trigger a signal element in the first control box (52), the first control box (52) sends a following signal to the tail end driving tower crane (40) to control the advancing speed of the tail end driving tower crane (40) so as to maintain a first preset horizontal included angle between the connecting frame (31) and the sprinkler body (10) and keep the foot arm span body (20) to move cooperatively with the sprinkler body (10).
  2. 2. The center support shaft type foot arm sprinkler according to claim 1, wherein the first link assembly (51) comprises a first sensing rod (511) and a limiting plate (512), one end of the first sensing rod (511) is fixedly connected with a trigger end of the first control box (52), the limiting plate (512) is fixed on the connecting frame (31), a plurality of limiting holes (513) are formed in the limiting plate (512) along the length direction of the limiting plate, and the end portion of the first sensing rod (511) can slide through different limiting holes (513) to adjust a first preset horizontal included angle between the connecting frame (31) and the sprinkler body (10).
  3. 3. The center support shaft type foot arm sprinkler according to claim 1, wherein the floating hinge assembly comprises a shaft body (32) and a sleeve (33), one of the shaft body (32) and the sleeve (33) is fixed on the connecting frame (31), the other is fixed on the foot arm span (20) and/or the sprinkler body (10), the sleeve (33) is sleeved on the periphery of the shaft body (32), and a preset radial gap is arranged between the shaft body (32) and the sleeve (33), so that the foot arm span (20) can float in a vertical plane relative to the sprinkler body (10).
  4. 4. The central support shaft type foundation arm sprinkler according to claim 3, wherein a ball head structure (321) is arranged at the top end of the shaft body (32), a ball socket structure (331) which is in sliding contact with the ball head structure (321) is arranged on the inner top wall of the sleeve (33), a first step structure (322) is arranged on the outer wall of the shaft body (32) along the axial direction, a second step structure (332) is arranged on the inner wall of the sleeve (33) along the axial direction, and the radial distance between the first step structure (322) and the second step structure (332) is in an increasing trend along the descending direction of the height, so that the foundation arm span body (20) can perform pitching swinging within a range of +/-15 degrees relative to the sprinkler body (10).
  5. 5. The center pivot foot arm sprinkler of claim 1, wherein the end drive tower (40) includes: The driving foot rest (41) is connected with the tail end of the foot arm span body (20), the driving foot rest (41) is rotatably connected with a wheel bracket (411), and wheels (412) are arranged in the wheel bracket (411); the induction guiding unit (42) is arranged on the wheel bracket (411), and the induction guiding unit (42) is used for detecting a physical guiding path preset on the ground and generating a guiding signal; A steering drive unit (43) for receiving the steering signal to adjust a steering angle of the wheel support (411) so that the wheel (412) walks along a physical guide path; And the walking driving unit (44) is used for receiving a following signal sent by the first control box (52) so as to adjust the travelling speed of the wheels (412).
  6. 6. The center support leg arm sprinkler of claim 5, wherein the steering drive unit (43) includes a steering motor and a steering reducer connected to each other for driving the wheel support (411) to rotate about the vertical axis, the travel drive unit (44) includes a travel motor and a travel reducer connected to each other for driving the wheels (412) to roll, and the steering motor and the travel motor are logically independent of each other in control.
  7. 7. The center support leg arm sprinkler of claim 5, wherein the physical guiding path is a magnetic cable pre-buried in the ground, the induction guiding unit (42) includes an induction antenna configured to detect a magnetic field signal of the magnetic cable and a ground magnetic controller configured to generate a guiding signal according to the magnetic field signal fed back by the induction antenna.
  8. 8. The central spindle type anchor arm sprinkler according to claim 1, wherein the water pipe on the anchor arm span body (20) is provided with a plurality of nozzle groups (60), an electromagnetic valve is arranged at a water inlet of each nozzle group (60), and the anchor arm sprinkler is further provided with a controller, and the controller is configured to control opening or closing of each electromagnetic valve through logic of a preset program according to the current position or the unfolding angle of the anchor arm span body (20).
  9. 9. The center pivot type foot arm sprinkler of claim 8, wherein the mechanical linkage feedback mechanism (50) further comprises a second link assembly (53) and a second control box (54), the second link assembly (53) is disposed between the connection frame (31) and the foot arm span (20), the second link assembly (53) is configured to mechanically displace following a second horizontal angle change between the connection frame (31) and the foot arm span (20) and trigger a signal element in the second control box (54), and the second control box (54) sends a spray signal to the controller to control opening and closing of a plurality of the solenoid valves.
  10. 10. The center support shaft type foot arm sprinkler according to claim 9, wherein the second link assembly (53) includes a fixing frame (531) and an axial elastic member (532), the fixing frame (531) is fixed on the connecting frame (31), one end of the axial elastic member (532) is connected with the fixing frame (531), and the other end is connected with the triggering end of the second control box (54).

Description

Central support shaft type lower margin arm sprinkler Technical Field The application relates to the technical field of agricultural irrigation equipment, in particular to a central fulcrum type foot arm sprinkler. Background The central support shaft type sprinkler is a large-scale water-saving irrigation device widely used at present. However, standard center-pivot sprayers can only cover a circular area, resulting in that the four corners of a square or rectangular land block cannot be irrigated, resulting in waste of land resources. In order to solve the problem, a sprinkling irrigation system with a foot arm is developed in the industry, a section of swingable span body is added at the tail end of a main sprinkling irrigation machine, the main sprinkling irrigation machine is unfolded to conduct supplementary sprinkling when passing through corners of a land block, and the main sprinkling irrigation machine is folded to be retracted when passing through edges of the land block. Although the existing sprinkler with the anchor arm solves the problem of missing spraying to a certain extent, the following main technical problems still exist in practical application: 1. The existing connection between the anchor arm and the sprinkler body typically employs a simple pivoting support or a hinge structure that allows only horizontal rotation. This design assumes that the ground is absolutely flat. However, actual farmlands often have a rolling grade. When the anchor arm moves to an ascending or descending road section, a large torsional stress is generated between the sprinkler body and the anchor arm due to the fact that the connection is rigidly locked in the vertical direction or the degree of freedom is insufficient. The connecting pin shaft is easy to break, the truss is easy to deform, and even the tail end driving wheels of the anchor arms are suspended and skid or excessively pressed into soil when serious, so that the whole machine cannot normally operate. 2. The deployment and retraction of the anchor arm essentially controls the angle of the anchor arm relative to the body. Prior art systems, such as those based in part on GPS or purely electronic angle sensors, rely primarily on complex electronic operations to maintain this angle. However, the field is severely ill-conditioned, such as high humidity, muddy water, lightning, and the delicate electronic angle sensor or GPS module is easily disturbed or damaged, and when a specific angle needs to be maintained to achieve cooperative motion, small fluctuations or delays in signals may cause frequent scram or jerk of the end tower, resulting in reduced irrigation uniformity, and aggravated mechanical wear. Once the electronic control system fails, it is difficult for an average farmer to maintain, resulting in long downtime. In view of the foregoing, there is a need for center pivot type anchor arm sprinkler irrigation to solve the above-mentioned problems. Disclosure of Invention The application provides a central support shaft type foot arm sprinkler which can be self-adaptive to the gradient change of the ground and can realize accurate coordination through reliable mechanical and physical feedback in control. The application provides a central support shaft type foot arm sprinkler which adopts the following technical scheme: the utility model provides a center pivot formula lower margin arm sprinkling irrigation machine, include the sprinkling irrigation machine main part with connect in the terminal lower margin arm span body of sprinkling irrigation machine main part, lower margin arm sprinkling irrigation machine still includes: the floating hinge mechanism comprises a connecting frame and a floating hinge assembly, wherein the floating hinge assembly is arranged between the connecting frame and the sprinkler body and/or at the joint of the connecting frame and the foot arm span body, and is configured to enable the foot arm span body and the sprinkler body to rotate relatively in the horizontal direction and allow the foot arm span body to generate gradient-adaptive floating displacement relative to the sprinkler body in the vertical direction; the tail end driving tower crane is arranged at the tail end of the foot arm span body and is used for driving the foot arm span body to move along a physical guide path preset on the ground; The mechanical linkage feedback mechanism comprises a first connecting rod assembly and a first control box, wherein the first connecting rod assembly is arranged between the connecting frame and the sprinkler body, the first connecting rod assembly is configured to follow the change of a first horizontal included angle between the connecting frame and the sprinkler body to generate mechanical displacement, trigger a signal element in the first control box, and the first control box is used for sending a following signal to the tail end driving tower crane so as to control the advancing speed of the tail end driving