Multi-stage automatic telescopic agricultural implement and control method

Abstract

The present invention provides a multi-stage automatic telescopic agricultural implement and a control method. The electro-hydraulic valve group is combined with a pressure sensor to realize that the telescopic movement of the agricultural implement can be automatically controlled as long as a multi-way valve of the agricultural machinery is connected, thereby reducing the occupation of the agricultural machinery multi-way valve resources and realizing single-handle operation by the user to prevent damage caused by user misoperation. The agricultural implement comprises a central frame, and is characterized in that an automatic telescopic valve group is also fixedly installed on the central frame, and the automatic telescopic valve group comprises an oil inlet port P, an oil return port T, and working ports A1, B1, A2, and B2; the automatic telescopic valve group also comprises a first electromagnetic reversing valve, a second electromagnetic reversing valve, a first pressure sensor, a second pressure sensor, and a controller.

Description

Technical Field

[0001] The present invention relates to the technical field related to agricultural implements and equipment, and in particular to a multi-stage automatic telescopic agricultural implement and a control method thereof. Background Art

[0002] In order to improve the operating efficiency of agricultural machinery, the agricultural implements mounted on agricultural machinery are getting bigger and bigger, and the width of agricultural implements is also getting bigger and bigger. In order to improve the passability of agricultural implements, agricultural implements are required to be foldable. For agricultural implements with larger widths, only single-stage folding cannot meet the passability requirements, and multi-stage folding is required. At present, multi-stage folding agricultural implements generally simply connect two sets of oil cylinders to the agricultural machinery multi-way valves respectively, which requires at least 2 multi-way valves, which will result in excessive occupation of multi-way valve resources, and users need to operate two handles to complete the on-off control of the two multi-way valves, which will cause users to easily misoperate and damage agricultural implements. Summary of the invention

[0003] In order to solve the problems mentioned in the above content, the present invention provides a multi-stage automatic retractable agricultural implement and a control method, which utilizes an electro-hydraulic valve group in combination with a pressure sensor to automatically control the extension and retraction of the agricultural implement as long as a multi-way valve connected to the agricultural machinery is connected, thereby reducing the occupation of the agricultural machinery multi-way valve resources and realizing single-handle operation by the user to prevent damage that may be caused by user misoperation.

[0004] The technical solution is as follows:

[0005] A multi-stage automatic telescopic agricultural implement, comprising a central frame, the central frame being used for connecting with a three-point suspension of an agricultural machine; horizontal slides are slidably connected to both sides of the central frame, two of the horizontal slides are respectively connected to one end of a first oil cylinder, and the other ends of the two first oil cylinders are connected to the central frame; the two horizontal slides are respectively connected to an expansion arm through a pin shaft, the two expansion arms are respectively connected to one end of a second oil cylinder, and the other ends of the two second oil cylinders are connected to the corresponding horizontal slide;

[0006] It is characterized in that: the central frame is also fixedly installed with an automatic telescopic valve group, which includes an oil inlet port P, an oil return port T, working ports A1, B1, A2, and B2. The oil inlet port P and the oil return port T are used to be connected to the agricultural machinery multi-way valve through an oil pipe, the working ports A1 and B1 are used to be connected to the rod chamber and the rodless chamber of the two first oil cylinders respectively, and the working ports A2 and B2 are used to be connected to the rod chamber and the rodless chamber of the two second oil cylinders respectively;

[0007] The automatic telescopic valve group also includes a first electromagnetic reversing valve, a second electromagnetic reversing valve and a first pressure sensor, a second pressure sensor, the P1 port of the first electromagnetic reversing valve and the P2 port of the second electromagnetic reversing valve are both communicated with the oil inlet port P, the T1 port of the first electromagnetic reversing valve and the T2 port of the second electromagnetic reversing valve are both communicated with the oil return port T, the first pressure sensor is used to detect the hydraulic pressure of the oil inlet port P, the second pressure sensor is used to detect the hydraulic pressure of the oil return port T, when the first electromagnetic reversing valve is powered on, its P1 port is communicated with the A1 port, and the T1 port is communicated with the B1 port, when the second electromagnetic reversing valve is powered on, its P2 port is communicated with the A2 port, and the T2 port is communicated with the B2 port, when the first electromagnetic reversing valve and the second electromagnetic reversing valve are powered off, their oil ports are both in a closed state;

[0008] The first solenoid reversing valve, the second solenoid reversing valve and the first pressure sensor and the second pressure sensor are all electrically connected to the controller, and the controller is used to collect the pressure detection values ​​of the first pressure sensor and the second pressure sensor and control the on and off of the first solenoid reversing valve and the second solenoid reversing valve.

[0009] Furthermore, a damping hole is connected between the oil inlet port P and the oil return port T.

[0010] Furthermore, an indicator light is installed on the controller, and the indicator light is used to indicate whether the agricultural implement is extended or retracted into place.

[0011] The present invention also provides a control method for the multi-stage automatic telescopic agricultural implement based on the above multi-stage automatic telescopic agricultural implement, which comprises the following steps:

[0012] Step 1: The user pushes the multi-way valve handle of the agricultural machinery to the extension direction or the retraction direction; if the user pushes the multi-way valve handle of the agricultural machinery to the extension direction, the multi-way valve switches to the right position to work, and the oil is input into the T port of the automatic telescopic valve group; if the user pushes the multi-way valve handle of the agricultural machinery to the retraction direction, the multi-way valve switches to the left position to work, and the oil is input into the P port of the automatic telescopic valve group;

[0013] Step 2, the controller collects the pressure detection values ​​of the first pressure sensor and the second pressure sensor; when the pressure detection value of the second pressure sensor is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the extension direction at this time, and then step 3 is executed; when the pressure detection value of the first pressure sensor is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the retraction direction at this time, and then step 4 is executed;

[0014] Step 3, the controller controls the first electromagnetic reversing valve to be energized, and the oil is input into the rodless chambers of the two first oil cylinders through the T1 port and the B1 port, pushing the two first oil cylinders to extend, and driving the horizontal slide to extend to the limit position, and the pressure detection value of the second pressure sensor is the overflow pressure again. The controller controls the second electromagnetic reversing valve to be energized, and the oil is input into the rodless chambers of the two second oil cylinders through the T2 port and the B2 port, pushing the two second oil cylinders to extend, and driving the deployment arm to be deployed in place, and the pressure detection value of the second pressure sensor is the overflow pressure again. The controller controls the indicator light to light up, prompting the user to deploy and extend the agricultural implement in place, and the user releases the multi-way valve handle to complete the operation;

[0015] Step 4, the controller controls the second electromagnetic reversing valve to be energized, and the oil is input into the rod chambers of the two second oil cylinders through the P2 port and the A2 port, pushing the two second oil cylinders to retract. After the deployment arm is driven to recover to the limit position, the pressure detection value of the first pressure sensor is the overflow pressure again. The controller controls the first electromagnetic reversing valve to be energized, and the oil is input into the rod chambers of the two first oil cylinders through the P1 port and the A1 port, pushing the two first oil cylinders to retract. After the horizontal slide is recovered to the position, the pressure detection value of the first pressure sensor is the overflow pressure again. The controller controls the indicator light to light up, prompting the user that the farm implement is retracted into position. At this time, the user releases the multi-way valve handle to complete the operation.

[0016] The beneficial effects of the present invention are:

[0017] The multi-stage automatic telescopic agricultural implement of the present invention is provided with an automatic telescopic valve group, and utilizes a combination of a first electromagnetic reversing valve, a second electromagnetic reversing valve, a first pressure sensor, a second pressure sensor and a controller to realize that as long as a multi-way valve connected to the agricultural machinery is connected, the telescopic operation of the agricultural implement can be automatically controlled, thereby reducing the occupation of the agricultural machinery multi-way valve resources and reducing the equipment cost; the control method based on the agricultural implement structure of the present invention only requires the user to operate a multi-way valve handle, and the controller can determine the current user's operation intention through the first pressure sensor and the second pressure sensor, and then execute a unique extension or retraction operation sequence to complete the automatic telescopic operation of the agricultural implement, thereby preventing the damage that may be caused by the user's misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the agricultural implement of the present invention in an unfolded state;

[0019] Figure 2 is a schematic diagram of the retracted state of the agricultural implement of the present invention;

[0020] Figure 3 It is a principle diagram of the automatic telescopic valve group in the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0023] like Figure 1-3 As shown, a multi-stage automatic telescopic agricultural implement comprises a central frame 1, wherein the central frame 1 is used for being connected to the three-point suspension of the agricultural machinery; horizontal slides 3 are slidably connected to both sides of the central frame 1, and the two horizontal slides 3 are respectively connected to one end of the first oil cylinder 2, and the other ends of the two first oil cylinders 2 are connected to the central frame 1; the two horizontal slides 3 are respectively connected to the unfolding arms 5 through the pin shaft 3-1, and the two unfolding arms 5 are respectively connected to one end of the second oil cylinder 4, and the other ends of the two second oil cylinders 4 are connected to the corresponding horizontal slides 3.

[0024] An automatic telescopic valve group 6 is also fixedly installed on the central frame 1, and the automatic telescopic valve group 6 includes an oil inlet P, an oil return port T, working ports A1, B1, A2, and B2. The oil inlet P and oil return port T are used to be connected to the agricultural machinery multi-way valve through an oil pipe, the working ports A1 and B1 are used to be connected to the rod chamber and rodless chamber of the two first oil cylinders 2 respectively, and the working ports A2 and B2 are used to be connected to the rod chamber and rodless chamber of the two second oil cylinders 4 respectively.

[0025] The automatic telescopic valve group 6 also includes a first electromagnetic reversing valve 8, a second electromagnetic reversing valve 9, a first pressure sensor 10, and a second pressure sensor 11. The P1 port of the first electromagnetic reversing valve 10 and the P2 port of the second electromagnetic reversing valve 11 are both connected to the oil inlet port P, and the T1 port of the first electromagnetic reversing valve 10 and the T2 port of the second electromagnetic reversing valve 11 are both connected to the oil return port T. The first pressure sensor 10 is used to detect the hydraulic pressure of the oil inlet port P, that is, to detect the hydraulic pressure of the P1 port and the P2 port. The second pressure sensor 11 is used to detect the hydraulic pressure of the oil return port T, that is, to detect the hydraulic pressure of the T1 port and the T2 port. When the first electromagnetic reversing valve 8 is powered on, its P1 port is connected to the A1 port, and the T1 port is connected to the B1 port. When the second electromagnetic reversing valve 9 is powered on, its P2 port is connected to the A2 port, and the T2 port is connected to the B2 port. When the first electromagnetic reversing valve 8 and the second electromagnetic reversing valve 9 are powered off, their oil ports are both in a closed state.

[0026] The first electromagnetic reversing valve 8, the second electromagnetic reversing valve 9, the first pressure sensor 10, and the second pressure sensor 11 are all electrically connected to the controller 7, and the controller 7 is used to collect the pressure detection values ​​of the first pressure sensor 10 and the second pressure sensor 11 and control the on and off of the first electromagnetic reversing valve 8 and the second electromagnetic reversing valve 9.

[0027] A damping hole 12 is connected between the oil inlet P and the oil return T. An indicator light is also installed on the controller 7, and the indicator light is used to indicate whether the agricultural implement is fully extended or not.

[0028] The present invention also provides a control method for the multi-stage automatic telescopic agricultural implement based on the above multi-stage automatic telescopic agricultural implement, which comprises the following steps:

[0029] Step 1: The user pushes the multi-way valve handle of the agricultural machinery toward the extension direction or the retraction direction; if the user pushes the multi-way valve handle of the agricultural machinery toward the extension direction, the multi-way valve switches to the right position to work, and the oil is input into the T port of the automatic telescopic valve group 6; if the user pushes the multi-way valve handle of the agricultural machinery toward the retraction direction, the multi-way valve switches to the left position to work, and the oil is input into the P port of the automatic telescopic valve group 6;

[0030] Step 2, the controller 7 collects the pressure detection values ​​of the first pressure sensor 10 and the second pressure sensor 11; when the pressure detection value of the second pressure sensor 11 is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the extension direction at this time, and then step 3 is executed; when the pressure detection value of the first pressure sensor 10 is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the retraction direction at this time, and then step 4 is executed;

[0031] Step 3, the controller 7 controls the first electromagnetic reversing valve 8 to be energized, and the oil is input into the rodless chambers of the two first oil cylinders 2 through the T1 port and the B1 port, pushing the two first oil cylinders 2 to extend, and driving the horizontal slide 3 to extend to the limit position, and the pressure detection value of the second pressure sensor 11 is the overflow pressure again, the controller 7 controls the second electromagnetic reversing valve 9 to be energized, and the oil is input into the rodless chambers of the two second oil cylinders 4 through the T2 port and the B2 port, pushing the two second oil cylinders 4 to extend, and driving the deployment arm 5 to be deployed in place, and the pressure detection value of the second pressure sensor 11 is the overflow pressure again, the controller 7 controls the indicator light to light up, prompting the user to deploy the agricultural implement to the full position, and at this time the user releases the multi-way valve handle to complete the operation;

[0032] Step 4, the controller 7 controls the second electromagnetic reversing valve 9 to be energized, and the oil is input into the rod chambers of the two second oil cylinders 4 through the P2 port and the A2 port, pushing the two second oil cylinders 4 to retract, and driving the deployment arm 5 to be recovered to the limit position. The pressure detection value of the first pressure sensor 10 is the overflow pressure again, and the controller 7 controls the first electromagnetic reversing valve 8 to be energized, and the oil is input into the rod chambers of the two first oil cylinders 2 through the P1 port and the A1 port, pushing the two first oil cylinders 2 to retract, and driving the horizontal slide 3 to be recovered to the position. The pressure detection value of the first pressure sensor 10 is the overflow pressure again, and the controller 7 controls the indicator light to light up, prompting the user that the agricultural implement is retracted into place. At this time, the user releases the multi-way valve handle to complete the operation.

[0033] Regardless of whether the agricultural implement is initially in an extended, retracted or intermediate state, the control logic of the present invention is the same, and the controller determines the current user's operating intention through the first pressure sensor and the second pressure sensor, and then executes a unique extension or retraction operation sequence.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage automatic telescopic agricultural implement, comprising a central frame, the central frame being used for connecting with a three-point suspension of an agricultural machine; horizontal slides are slidably connected to both sides of the central frame, two of the horizontal slides are respectively connected to one end of a first oil cylinder, and the other ends of the two first oil cylinders are connected to the central frame; the two horizontal slides are respectively connected to an expansion arm through a pin shaft, the two expansion arms are respectively connected to one end of a second oil cylinder, and the other ends of the two second oil cylinders are connected to the corresponding horizontal slide; Features: The central frame is also fixedly installed with an automatic telescopic valve group, which includes an oil inlet P port, an oil return port T port, and working ports A1 port, B1 port, A2 port, and B2 port; the automatic telescopic valve group also includes a first electromagnetic reversing valve, a second electromagnetic reversing valve, a first pressure sensor, and a second pressure sensor. The P1 port of the first electromagnetic reversing valve and the P2 port of the second electromagnetic reversing valve are both connected to the oil inlet P port, the T1 port of the first electromagnetic reversing valve and the T2 port of the second electromagnetic reversing valve are both connected to the oil return port T port, and the first electromagnetic reversing valve and the second electromagnetic reversing valve are connected to the oil return port T port. A pressure sensor is used to detect the hydraulic pressure of the oil inlet P port, and the second pressure sensor is used to detect the hydraulic pressure of the oil return port T port; the first solenoid reversing valve, the second solenoid reversing valve and the first pressure sensor, the second pressure sensor are all electrically connected to the controller; the oil inlet P port and the oil return port T port are used to be connected to the agricultural machinery multi-way valve through an oil pipe; the working ports A1 and B1 ports are used to be connected to the rod chamber and rodless chamber of the two first oil cylinders respectively, and the A2 port and B2 port are used to be connected to the rod chamber and rodless chamber of the two second oil cylinders respectively.

2. A multi-stage automatic telescopic agricultural implement according to claim 1, Features: When the first solenoid reversing valve is energized, its P1 port is connected to the A1 port, and the T1 port is connected to the B1 port. When the second solenoid reversing valve is energized, its P2 port is connected to the A2 port, and the T2 port is connected to the B2 port. When the first solenoid reversing valve and the second solenoid reversing valve are de-energized, their oil ports are both in the closed state.

3. A multi-stage automatic telescopic agricultural implement according to claim 1, Features: The controller is used to collect the pressure detection values ​​of the first pressure sensor and the second pressure sensor and to control the on and off of the first electromagnetic reversing valve and the second electromagnetic reversing valve.

4. A multi-stage automatic telescopic agricultural implement according to claim 1, Features: A damping hole is connected between the oil inlet port P and the oil return port T.

5. A multi-stage automatic telescopic agricultural implement according to claim 1, Features: The controller is also provided with an indicator light, which is used to indicate whether the agricultural implement is fully extended or not.

6. A control method for a multi-stage automatic telescopic agricultural implement according to any one of claims 1 to 5, Features: It includes the following steps: Step 1: The user pushes the multi-way valve handle of the agricultural machinery to the extension direction or the retraction direction; if the user pushes the multi-way valve handle of the agricultural machinery to the extension direction, the multi-way valve switches to the right position to work, and the oil is input into the T port of the automatic telescopic valve group; if the user pushes the multi-way valve handle of the agricultural machinery to the retraction direction, the multi-way valve switches to the left position to work, and the oil is input into the P port of the automatic telescopic valve group; Step 2, the controller collects the pressure detection values ​​of the first pressure sensor and the second pressure sensor; when the pressure detection value of the second pressure sensor is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the extension direction at this time, and then step 3 is executed; when the pressure detection value of the first pressure sensor is the overflow pressure, it is determined that the user pushes the multi-way valve handle of the agricultural machinery to the retraction direction at this time, and then step 4 is executed; Step 3, the controller controls the first electromagnetic reversing valve to be energized, and the oil is input into the rodless chambers of the two first oil cylinders through the T1 port and the B1 port, pushing the two first oil cylinders to extend, and driving the horizontal slide to extend to the limit position, and the pressure detection value of the second pressure sensor is the overflow pressure again. The controller controls the second electromagnetic reversing valve to be energized, and the oil is input into the rodless chambers of the two second oil cylinders through the T2 port and the B2 port, pushing the two second oil cylinders to extend, and driving the deployment arm to be deployed in place, and the pressure detection value of the second pressure sensor is the overflow pressure again. The controller controls the indicator light to light up, prompting the user to deploy and extend the agricultural implement in place, and the user releases the multi-way valve handle to complete the operation; Step 4, the controller controls the second electromagnetic reversing valve to be energized, and the oil is input into the rod chambers of the two second oil cylinders through the P2 port and the A2 port, pushing the two second oil cylinders to retract. After the deployment arm is driven to recover to the limit position, the pressure detection value of the first pressure sensor is the overflow pressure again. The controller controls the first electromagnetic reversing valve to be energized, and the oil is input into the rod chambers of the two first oil cylinders through the P1 port and the A1 port, pushing the two first oil cylinders to retract. After the horizontal slide is recovered to the position, the pressure detection value of the first pressure sensor is the overflow pressure again. The controller controls the indicator light to light up, prompting the user that the farm implement is retracted into position. At this time, the user releases the multi-way valve handle to complete the operation.

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