Motor control device of multi-way valve

Abstract

The utility model discloses a motor control device of a multi-way valve, which belongs to the technical field of multi-way valve control, and comprises a multi-way valve formed by combining multi-way valve bodies, a valve core is arranged in each valve body, and the valve core is driven by a common motor to stretch in the valve body; an absolute value encoder is arranged on the back face, opposite to the power output shaft, of the common motor and communicates with a control panel, a rotating shaft fixedly connected with the power output shaft is arranged on the back face of the common motor, and the absolute value encoder is installed on the rotating shaft. According to the motor control device of the multi-way valve, a common motor can be combined with the multi-circle absolute value encoder, the moving stroke of the valve element of the multi-way valve can be accurately controlled through lead screw transmission, and therefore the action of an agricultural implement can be more accurate, meanwhile, automatic control can be achieved conveniently, and cost is lower.

Description

Technical Field

[0001] The utility model relates to a motor control device for a multi-way valve, belonging to the technical field of multi-way valve control. Background Art

[0002] The agricultural implements towed behind a tractor are required to perform actions such as lowering, lifting, and flipping. These actions are realized on the tractor through a hydraulic lifter, and the hydraulic lifter is controlled by a multi-way valve. At present, all the multi-way valves used in domestic agricultural machinery are electromagnetic multi-way valves or mechanical control multi-way valves, and the mechanical control multi-way valves are in the majority. The so-called mechanical control generally connects the valve core of the multi-way valve with a pull rod or a wire cable, and the valve core is pushed and pulled by manually pushing and pulling the pull rod or the wire cable.

[0003] The displacement of the valve core determines the action amplitude of the agricultural implement. It is difficult to accurately brake the valve core through an electromagnetic valve and a mechanical control multi-way valve to achieve the precise action of the agricultural implement. Therefore, the driver needs to repeatedly manipulate the pull rod back and forth to make the agricultural implement reach the predetermined position, which is rather troublesome. Especially in modern farmlands with a high degree of automation, automatic high-precision control cannot be achieved.

[0004] In summary, it is obvious that the prior art has inconveniences and defects in actual use, so it is necessary to be improved. Content of the Utility Model

[0005] Aiming at the deficiencies in the background art, the utility model provides a motor control device for a multi-way valve, which can utilize the combination of a common motor and a multi-turn absolute encoder to accurately control the moving stroke of the valve core of the multi-way valve through a lead screw drive, so that the action of the agricultural implement can be more accurate, and at the same time, it is convenient to realize automatic control and has a lower cost.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A motor control device for a multi-way valve includes a multi-way valve composed of a multi-way valve body. A valve core is arranged in the valve body, and the valve core is driven by a common motor to stretch in the valve body;

[0008] An absolute encoder is arranged on the back of the common motor opposite to the power output shaft, and the absolute encoder communicates with a control panel.

[0009] Further, a rotating shaft fixedly connected to the power output shaft is arranged on the back of the common motor, and the absolute encoder is installed on the rotating shaft.

[0010] Further, the absolute encoder is a multi-turn absolute encoder, and the absolute encoder communicates with the control panel through an RS-485 communication protocol.

[0011] Further, a lead screw is fixed on the power output shaft of the ordinary motor, the valve core is coaxially provided with a threaded hole, and the lead screw is rotatably installed in the threaded hole of the valve core.

[0012] Further, the external thread of the lead screw is a rectangular thread.

[0013] After the present utility model adopts the above technical solutions, compared with the prior art, it has the following advantages:

[0014] 1. A control knob is provided on the control panel. Rotating the control knob sends a control signal to the absolute encoder to accurately control the rotation angle of the ordinary motor, thereby accurately controlling the telescopic amount of the valve core. At the same time, the absolute encoder sends a real-time feedback signal of the rotation angle of the output shaft of the ordinary motor to the control panel, thereby realizing the accurate control of the action stroke of the agricultural implement.

[0015] 2. By combining the ordinary motor with the absolute encoder, there is no need to use a servo motor for control. The price of a servo motor is several times that of an ordinary motor, and the number of motors is relatively large. Therefore, the combination of the ordinary motor and the absolute encoder greatly reduces the production cost.

[0016] 3. A lead screw is fixed on the power output shaft of the ordinary motor, the valve core is coaxially provided with a threaded hole, and the lead screw is rotatably installed in the threaded hole of the valve core. The lead screw and the valve core are accurately matched by threads, and the telescopic amount of the valve core is accurately controlled by controlling the rotation angle of the lead screw.

[0017] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the connection between the ordinary motor and the multi-way valve;

[0019] Figure 2 is a front view of the connection between the ordinary motor and the multi-way valve;

[0020] Figure 3 is a schematic combined structural diagram of the ordinary motor and the absolute encoder.

[0021] In the figure,

[0022] 1 - ordinary motor, 2 - absolute encoder, 3 - lead screw, 4 - valve core, 5 - multi-way valve body, 6 - rotating shaft. Specific Embodiments

[0023] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings.

[0024] As Figures 1-3As shown in the figure, the present utility model provides a motor control device for a multi-way valve, including a multi-way valve composed of a multi-way valve body 5. A valve core 4 is arranged inside the valve body 5, and the valve core 4 is driven by a general motor 1 to expand and contract inside the valve body 5.

[0025] On the back of the general motor 1 opposite to the power output shaft, there is an absolute encoder 2. The absolute encoder 2 communicates with a control panel (not shown in the figure). There is a control knob on the control panel. Rotating the control knob sends a control signal to the absolute encoder 2 to accurately control the rotation angle of the general motor 1, thereby accurately controlling the expansion and contraction amount of the valve core 4. At the same time, the absolute encoder 2 sends a real-time feedback signal of the rotation angle of the output shaft of the general motor 1 to the control panel, thereby realizing the accurate control of the action stroke of the agricultural implement.

[0026] The control panel includes an integrated circuit board, a control knob, and control software. The signal line of the absolute encoder 2 is connected to the integrated circuit board. The communication method of the encoder and the control software are conventional technologies and are not within the scope of protection of the present utility model, so they will not be elaborated here.

[0027] By combining a general motor and an absolute encoder, there is no need to use a servo motor for control. The price of a servo motor is several times that of a general motor, and the number of motors is relatively large. Therefore, the combination of a general motor and an absolute encoder greatly reduces the production cost.

[0028] On the back of the general motor 1, there is a rotating shaft fixedly connected to the power output shaft, and the absolute encoder 2 is installed on the rotating shaft 6.

[0029] The absolute encoder 2 is a multi-turn absolute encoder, and the absolute encoder 2 communicates with the control panel through the RS-485 communication protocol.

[0030] A lead screw 3 is fixed on the power output shaft of the general motor 1. The valve core 4 is coaxially provided with a threaded hole, and the lead screw 3 is rotatably installed in the threaded hole of the valve core 4. The lead screw 3 and the valve core 4 are accurately matched by threads, and the expansion and contraction amount of the valve core 4 is accurately controlled by controlling the rotation angle of the lead screw 3.

[0031] The external thread of the lead screw 3 is a rectangular thread.

[0032] The specific working principle of the present utility model:

[0033] The expansion and contraction of the valve core 4 is controlled by the general motor 1, and the rotation amount of the general motor 1 is accurately controlled by a multi-turn absolute encoder. The absolute encoder and the control panel form a closed-loop control. Within the total expansion and contraction stroke of the valve core 4, the middle position of the stroke is the origin position. When the valve core 4 moves to one side deviating from the origin, it controls the agricultural implement to act in one direction, and when the valve core 4 moves to the other side deviating from the origin in the opposite direction, it controls the agricultural implement to act in the other direction.

[0034] A lead screw 3 is fixed on the power output shaft of the ordinary motor 1. The valve core 4 is coaxially provided with a threaded hole, and the lead screw 3 is rotatably installed in the threaded hole of the valve core 4. The lead screw 3 and the valve core 4 are precisely matched by threads, and the telescopic amount of the valve core 4 is precisely controlled by controlling the rotation angle of the lead screw 3.

[0035] The above is an example of the best implementation mode of the present invention, and the parts not described in detail are all well-known common sense to those of ordinary skill in the art. The protection scope of the present invention shall be subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention is also within the protection scope of the present invention.

Claims

1. A motor control device for a multi-way valve, comprising a multi-way valve composed of a multi-way valve body (5), wherein a valve core (4) is arranged in the valve body (5), and it is characterized in that: The valve core (4) is driven by a general motor (1) to expand and contract in the valve body (5); An absolute encoder (2) is arranged on the back of the general motor (1) opposite to the power output shaft, and the absolute encoder (2) communicates with a control panel.

2. The motor control device of a multi-way valve according to claim 1, characterized in that: A rotating shaft fixedly connected to the power output shaft is arranged on the back of the general motor (1), and the absolute encoder (2) is installed on the rotating shaft (6).

3. The motor control device of a multi-way valve according to claim 1, characterized in that: The absolute encoder (2) is a multi-turn absolute encoder, and the absolute encoder (2) communicates with the control panel through the RS-485 communication protocol.

4. The motor control device of a multi-way valve according to claim 1, characterized in that: A lead screw (3) is fixed on the power output shaft of the general motor (1), a threaded hole is coaxially arranged on the valve core (4), and the lead screw (3) is rotatably installed in the threaded hole of the valve core (4).

5. The motor control device of a multi-way valve according to claim 4, characterized in that: The external thread of the lead screw (3) is a rectangular thread.

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