Multi-way reversing valve group with electric control lifting function

Abstract

The utility model discloses a multi-way reversing valve group with electric control lifting. The multi-way reversing valve group comprises an oil inlet valve body, a plurality of serially connected manual control valves arranged on the oil inlet valve body, an oil inlet, an oil return port and a system overflow valve communicated with the oil inlet, the first working oil port and the second working oil port of the overturning oil cylinder, the first working oil port of the adjusting oil cylinder and the second working oil port of the adjusting oil cylinder are communicated with the three-position four-way electromagnetic directional valve; a first working oil port of the overturning oil cylinder is controlled by a first electromagnetic directional valve, a second working oil port of the overturning oil cylinder is controlled by a second electromagnetic directional valve, a first working oil port of the adjusting oil cylinder is controlled by a third electromagnetic directional valve, and a second working oil port of the adjusting oil cylinder is controlled by a fourth electromagnetic directional valve. According to the utility model, the response speed is high, and the control position accuracy and the control safety of a controlled part can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, and particularly relates to a multi-way directional valve group with electric control lifting for agricultural machinery. Background Technique

[0002] A rotary tiller is a commonly used agricultural machinery. For example, a Chinese invention patent with the patent number CN202310439382.7 discloses a self-leveling rotary tiller, belonging to the technical field of rotary tillage equipment, which comprises a frame, a rotary cutter shaft, rotary tiller blades and a transmission device. The transmission device is fixedly installed on the upper part of the frame. Side guards are arranged at the ends of the frame. Both ends of the rotary cutter shaft are rotatably connected with the side guards. A plurality of rotary tiller blades are installed on the rotary cutter shaft. The rotary cutter shaft is driven by the transmission device. The towing frame comprises a first rotating frame and a second rotating frame. The first rotating frame comprises a first rotating collar. A first fixing plate extends from the outer surface of the first rotating collar. A connecting seat is installed at the front part of the fixing plate. The second rotating frame comprises a second rotating collar. A second fixing plate extends from the outer surface of the second rotating collar. The first fixing collar and the second fixing collar are connected by a gantry beam. A leveling structure is arranged on both sides of the frame.

[0003] In the actual operation process, various components of the rotary tiller, including a leveling mechanism, a lifting mechanism, a flipping mechanism, etc., all need to be controlled by a hydraulic valve group. However, the existing hydraulic valve groups are all manually controlled, which not only have a large volume and a slow reaction speed. More importantly, for the control of components such as the flipping mechanism, not only a fast reaction speed is required, but also the accurate control position and control safety of the components are required. Content of the Utility Model

[0004] Technical Problem to be Solved

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a multi-way directional valve group with electric control lifting, which overcomes the deficiencies of the prior art, can not only ensure the reaction speed, but also ensure the accurate control position and control safety of the controlled components.

[0006] Technical Solution

[0007] To solve the above technical problems, the present utility model provides a multi-way directional control valve group with electrically controlled lifting, which includes an oil inlet valve body, a plurality of series-connected manual control valves arranged on the oil inlet valve body, an oil inlet and an oil return port, and a system relief valve communicated with the oil inlet; it further includes a three-position four-way electromagnetic directional control valve, a first working oil port, a second working oil port of a tipping cylinder, a first working oil port of an adjusting cylinder, and a second working oil port of the adjusting cylinder communicated with the three-position four-way electromagnetic directional control valve; the first working oil port of the tipping cylinder is controlled by a first electromagnetic directional control valve, and when the first electromagnetic directional control valve is in the original position, the first working oil port of the tipping cylinder is in a disconnected state, the second working oil port of the tipping cylinder is controlled by a second electromagnetic directional control valve, and when the second electromagnetic directional control valve is in the original position, the second working oil port of the tipping cylinder is in a disconnected state, the first working oil port of the adjusting cylinder is controlled by a third electromagnetic directional control valve, and when the third electromagnetic directional control valve is in the original position, the first working oil port of the adjusting cylinder is in a disconnected state, the second working oil port of the adjusting cylinder is controlled by a fourth electromagnetic directional control valve, and when the fourth electromagnetic directional control valve is in the original position, the second working oil port of the adjusting cylinder is in a disconnected state.

[0008] As a further preferred technical solution of the present utility model; the first working oil port of the tipping cylinder and the first working oil port of the adjusting cylinder are connected in parallel, and the second working oil port of the tipping cylinder and the second working oil port of the adjusting cylinder are connected in parallel.

[0009] As a further preferred technical solution of the present utility model; the first electromagnetic directional control valve, the second electromagnetic directional control valve, the third electromagnetic directional control valve, and the fourth electromagnetic directional control valve are all two-position two-way normally closed solenoid valves with bidirectional check valves.

[0010] As a further preferred technical solution of the present utility model; the first electromagnetic directional control valve and the second electromagnetic directional control valve are installed at both ends of the middle valve body, the third electromagnetic directional control valve and the fourth electromagnetic directional control valve are installed at both ends of the tail valve body, and the three-position four-way electromagnetic directional control valve is installed on the tail valve body.

[0011] As a further preferred technical solution of the present utility model; the three-position four-way electromagnetic directional control valve is an H-type three-position four-way electromagnetic directional control valve in the middle position to ensure that the system relief valve is in a unloading state when the hydraulic pump starts.

[0012] As a further preferred technical solution of the present utility model; the three-position four-way electromagnetic directional control valve and the manual control valve are connected in series.

[0013] Beneficial effects

[0014] Compared with the prior art, the present utility model not only has a fast response speed, but also can ensure the accurate control position and control safety of the controlled components. Description of the drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 for the present utility model Figure 1 top view schematic diagram;

[0017] Figure 3 is a side view schematic diagram of the present utility model;

[0018] Figure 4 is the hydraulic schematic diagram of the present utility model. Specific embodiments

[0019] This specific embodiment is a multi-way directional control valve group with electric control lifting, and its structural schematic diagram is as shown in Figures 1-4As shown in the figure, the multi-way directional control valve group with electric control lifting includes an oil inlet valve body 1, a plurality of series-connected manual control valves 2 provided on the oil inlet valve body 1, an oil inlet port P, an oil return port T, and a system relief valve 3 communicated with the oil inlet port P. The hydraulic oil coming in from the hydraulic pump enters from the oil inlet port P, and the pressure of the system is controlled by the system relief valve. The returned hydraulic oil returns to the hydraulic oil tank from the oil return port P. The number of manual control valves 2 is set according to actual needs. In this embodiment, 3 are set; it also includes a three-position four-way solenoid directional control valve 4, a first working oil port A4 of the tipping cylinder communicated with the three-position four-way solenoid directional control valve 4, a second working oil port B4 of the tipping cylinder, a first working oil port A5 of the adjustment cylinder, and a second working oil port B5 of the adjustment cylinder; the first working oil port A4 of the tipping cylinder is controlled by a first solenoid directional control valve 5, and when the first solenoid directional control valve 5 is in its original position, the first working oil port A4 of the tipping cylinder is in a disconnected state. The second working oil port B4 of the tipping cylinder is controlled by a second solenoid directional control valve 6, and when the second solenoid directional control valve 6 is in its original position, the second working oil port B4 of the tipping cylinder is in a disconnected state. The first working oil port A5 of the adjustment cylinder is controlled by a third solenoid directional control valve 7, and when the third solenoid directional control valve 7 is in its original position, the first working oil port A5 of the adjustment cylinder is in a disconnected state. The second working oil port B5 of the adjustment cylinder is controlled by a fourth solenoid directional control valve 8, and when the fourth solenoid directional control valve 8 is in its original position, the second working oil port B5 of the adjustment cylinder is in a disconnected state; the first working oil port A4 and the second working oil port B4 of the tipping cylinder are used to connect with the tipping cylinder to cooperate with the action of the tipping cylinder. The first working oil port A5 and the second working oil port B5 of the adjustment cylinder are used to connect with the adjustment cylinder to cooperate with the action of the adjustment cylinder. Through the above settings, because the first working oil port A4 of the tipping cylinder is controlled by the first solenoid directional control valve 5 to be opened and closed, and when the first solenoid directional control valve 5 is not energized, that is, when it is in its original position, the first working oil port A5 of the adjustment cylinder is in a disconnected state; the second working oil port B4 of the tipping cylinder is controlled by the second solenoid directional control valve 6 to be opened and closed, and when the second solenoid directional control valve 6 is not energized, that is, when it is in its original position, the second working oil port B4 is in a disconnected state. Similarly, the first working oil port A5 of the adjustment cylinder is controlled by the third solenoid directional control valve 7 to be opened and closed, and when the third solenoid directional control valve 7 is in its original position, that is, when the third solenoid directional control valve 7 is not energized, the first working oil port A5 of the adjustment cylinder is in a disconnected state. The second working oil port B5 of the adjustment cylinder is controlled by the fourth solenoid directional control valve 8 to be opened and closed, and when the fourth solenoid directional control valve 8 is in its original position, that is, when the fourth solenoid directional control valve 8 is not energized, the second working oil port B5 of the adjustment cylinder is in a disconnected state; through such settings, the first working oil port of the adjustment cylinder, the second working oil port of the adjustment cylinder, the first working oil port of the tipping cylinder, and the second working oil port of the tipping cylinder are all controlled by separate solenoid directional control valves, not only the reaction speed, but also the control position of the controlled components can be accurately guaranteed and the control safety can be ensured;Meanwhile, the first working oil port A4 of the tipping oil cylinder and the first working oil port A5 of the adjustment oil cylinder are connected in parallel, and the second working oil port B4 of the tipping oil cylinder and the second working oil port B5 of the adjustment oil cylinder are connected in parallel; meanwhile, the three-position four-way electromagnetic directional control valve 4 and the manual control valve 2 are connected in series; the three-position four-way electromagnetic directional control valve 4 is an H-type three-position four-way electromagnetic directional control valve in the neutral position to ensure that the system relief valve 3 is in the unloading state when the hydraulic pump is started, realizing low-pressure start-up, which is energy-saving and ensures safety.

[0020] Furthermore, in this embodiment, the first electromagnetic directional control valve 5, the second electromagnetic directional control valve 6, the third electromagnetic directional control valve 7 and the fourth electromagnetic directional control valve 8 are all two-position two-way normally closed solenoid valves with bidirectional check valves, and the stability of pressure holding is realized through this.

[0021] Furthermore, the first electromagnetic directional control valve 5 and the second electromagnetic directional control valve 6 are installed at both ends of the middle valve body 9, the third electromagnetic directional control valve 7 and the fourth electromagnetic directional control valve 8 are installed at both ends of the tail valve body 10, the three-position four-way electromagnetic directional control valve is installed on the tail valve body 10, and the oil inlet valve body, the manual control valve, the middle valve body and the tail valve body are fixed together by four bolts and nuts.

[0022] All technical features in this embodiment can be freely combined according to actual needs.

[0023] The above embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. The multi-way directional control valve group with electric control lift includes an oil inlet valve body (1), a plurality of series-connected manual control valves (2) arranged on the oil inlet valve body (1), an oil inlet port (P) and an oil return port (T), and a system overflow valve (3) communicated with the oil inlet port (P); it is characterized in that: It also includes a three-position four-way solenoid directional control valve (4), a first working oil port (A4) of a tipping cylinder communicated with the three-position four-way solenoid directional control valve (4), a second working oil port (B4) of the tipping cylinder, a first working oil port (A5) of an adjusting cylinder, and a second working oil port (B5) of the adjusting cylinder; the first working oil port (A4) of the tipping cylinder is controlled by a first solenoid directional control valve (5), and when the first solenoid directional control valve (5) is in the original position, the first working oil port (A4) of the tipping cylinder is in a disconnected state, the second working oil port (B4) of the tipping cylinder is controlled by a second solenoid directional control valve (6), and when the second solenoid directional control valve (6) is in the original position, the second working oil port (B4) of the tipping cylinder is in a disconnected state, the first working oil port (A5) of the adjusting cylinder is controlled by a third solenoid directional control valve (7), and when the third solenoid directional control valve (7) is in the original position, the first working oil port (A5) of the adjusting cylinder is in a disconnected state, the second working oil port (B5) of the adjusting cylinder is controlled by a fourth solenoid directional control valve (8), and when the fourth solenoid directional control valve (8) is in the original position, the second working oil port (B5) of the adjusting cylinder is in a disconnected state.

2. The multi-way directional control valve group with electrically controlled lifting according to claim 1, characterized in that: The first working oil port (A4) of the tipping cylinder and the first working oil port (A5) of the adjusting cylinder are connected in parallel, and the second working oil port (B4) of the tipping cylinder and the second working oil port (B5) of the adjusting cylinder are connected in parallel.

3. The multi-way directional control valve group with electric control lifting according to claim 1, characterized in that: The first solenoid directional control valve (5), the second solenoid directional control valve (6), the third solenoid directional control valve (7), and the fourth solenoid directional control valve (8) are all two-position two-way check normally closed solenoid valves.

4. The multi-way directional control valve group with electric control lifting according to claim 3, characterized in that: The first solenoid directional control valve (5) and the second solenoid directional control valve (6) are installed at both ends of an intermediate valve body (9), the third solenoid directional control valve (7) and the fourth solenoid directional control valve (8) are installed at both ends of a tail valve body (10), and the three-position four-way solenoid directional control valve is installed on the tail valve body (10).

5. The multi-way directional control valve group with electric control lifting according to claim 1, characterized in that: The three-position four-way solenoid directional control valve (4) is an H-type three-position four-way solenoid directional control valve in the middle position to ensure that the system relief valve (3) is in a unloading state when the hydraulic pump starts.

6. The multi-way directional control valve group with electrically controlled lifting according to claim 1, characterized in that: The three-position four-way solenoid directional control valve (4) and the manual control valve (2) are connected in series.

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