Agricultural machine multi-way valve, multi-way valve working linkage structure and agricultural machine

Abstract

The utility model discloses an agricultural machine multi-way valve, a multi-way valve working linkage structure and an agricultural machine, and belongs to the technical field of multi-way valves. The agricultural machine multi-way valve comprises a compensation valve; the first oil way is communicated with the compensation valve; the main valve is communicated with the compensation valve through the first oil way; the second oil way is communicated with the main valve and a load; the third oil way is communicated with the main valve and a load; the number of the one-way valves is two, and the two one-way valves are located in the second oil way and the third oil way respectively. The multi-way valve of the agricultural machine is simpler and more convenient in structure, and the durability of the multi-way valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-way valves, in particular to an agricultural machinery multi-way valve, a multi-way valve working connection structure and agricultural machinery. Background Art

[0002] The agricultural machinery multi-way valve is a device that can control multiple hydraulic actuators connected together, and realize the corresponding hydraulic action by switching the hydraulic circuit. As the core control element in the hydraulic system of agricultural machinery, it has multiple functions such as flow diversion, flow collection, reversing, and pressure regulation, and can meet the diverse needs of agricultural machinery and equipment. Its flexibility, reliability, compact structure, and easy maintenance make the agricultural machinery multi-way valve widely used in the field of agricultural machinery. In agricultural machinery such as tractors, multi-way valves are often used to control the actions of hydraulic farm implements, such as trailer lifting, steering gear control, hydraulic power steering and other operations. Therefore, multi-way valves are relatively core components in agricultural machinery.

[0003] However, the current agricultural machinery multi-way valve has a complex structure and many components, and the working environment of agricultural machinery is usually harsh, which makes the multi-way valve prone to failure. Therefore, this scheme proposes an agricultural machinery multi-way valve with a simpler structure to improve the durability of the multi-way valve. Utility Model Content

[0004] The main purpose of the utility model is to provide an agricultural machinery multi-way valve, a multi-way valve working joint structure and agricultural machinery.

[0005] To achieve the above-mentioned purpose, the agricultural machinery multi-way valve proposed by the utility model comprises:

[0006] Compensation valve;

[0007] a first oil circuit, the first oil circuit being connected to the compensation valve;

[0008] a main valve, the main valve being in communication with the compensation valve through the first oil passage;

[0009] a second oil circuit, the second oil circuit connecting the main valve and a load;

[0010] a third oil circuit, the third oil circuit connecting the main valve and the load;

[0011] One-way valve, two one-way valves are provided, and are respectively located in the second oil circuit and the third oil circuit.

[0012] Optionally, in an embodiment of the utility model, a motor is further included, and the motor is drivingly connected to the main valve.

[0013] Optionally, in an embodiment of the present invention, the motor is a forward and reverse motor.

[0014] Optionally, in an embodiment of the present utility model, the motor is rigidly connected to the valve core of the main valve.

[0015] Optionally, in an embodiment of the present invention, the one-way valve is a conical seal.

[0016] Optionally, in an embodiment of the present utility model, the compensation valve is connected to the oil tank.

[0017] In order to achieve the above-mentioned purpose, the utility model also proposes a multi-way valve working joint structure, and the working joint structure includes the agricultural machinery multi-way valve described above.

[0018] Optionally, in an embodiment of the present utility model, the working joint structure further includes an overflow valve, and the overflow valve is connected to the compensation valve.

[0019] Optionally, in an embodiment of the present utility model, it includes:

[0020] Four working joints, each of which is provided with a load holding valve and a compensator;

[0021] Lifting joint, including hydraulically controlled non-return valve;

[0022] Oil inlet union, including compensator.

[0023] In order to achieve the above-mentioned object, the utility model also proposes an agricultural machinery, which includes the agricultural machinery multi-way valve described above.

[0024] Compared with the prior art, the utility model can at least achieve the following beneficial effects. Compared with the agricultural machinery multi-way valve in the prior art, the present solution proposes a multi-way valve structure with a simpler structure, which includes a compensation valve, a main valve, a one-way valve and three oil circuits. Through the movement of the main valve core in the main valve, the hydraulic oil in the multi-way valve is controlled to move along different oil circuits to achieve different working actions of the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a structural schematic diagram of a multi-way valve for agricultural machinery in a lifting state according to the utility model;

[0027] Figure 2 This is a structural schematic diagram of a multi-way valve for agricultural machinery in a descending state according to the utility model;

[0028] Figure 3 The utility model is a structural schematic diagram of a multi-way valve for agricultural machinery in a floating state.

[0029] Description of Figure Numbers:

[0030] 100, compensation valve; 200, first oil circuit; 300, main valve; 310, valve core; 400, second oil circuit; 500, third oil circuit; 600, check valve; 700, motor; 800, oil inlet;

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] Reference Figure 1~Figure 3 The utility model provides an agricultural machinery multi-way valve, comprising:

[0037] Compensation valve 100;

[0038] A first oil circuit 200 , the first oil circuit 200 is connected to the compensation valve 100 ;

[0039] A main valve 300 , the main valve 300 is connected to the compensation valve 100 through the first oil passage 200 ;

[0040] A second oil circuit 400 , the second oil circuit 400 connects the main valve 300 and the load;

[0041] A third oil circuit 500 , the third oil circuit 500 connects the main valve 300 and the load;

[0042] One-way valve 600 . Two one-way valves 600 are provided, and are located in the second oil passage 400 and the third oil passage 500 respectively.

[0043] For ease of understanding, the working principle of the agricultural machinery multi-way valve is introduced, and the load is defined as an oil cylinder, which is connected to an agricultural implement. The oil cylinder is divided into chamber A and chamber B. When the pressure in chamber A is greater than that in chamber B, the agricultural implement is lifted, and vice versa, the agricultural implement is lowered, and the second oil circuit 400 is connected to chamber B, and the second oil circuit 400 is connected to chamber A. It should be noted that the working environment mentioned here is an assumed working environment and is not a limitation of this solution.

[0044] 1. Initial State

[0045] In the initial state, since the valve core 310 of the main valve 300 does not switch, it blocks the first oil circuit 200. At this time, the compensation valve 100 and the main valve 300 are not connected, and the hydraulic oil enters the compensation valve 100 from the oil tank, and the hydraulic oil cannot enter the load through the first oil circuit 200. The specific load may be an oil cylinder. At this time, the main valve 300 is pressed at the valve core 310, and the oil will flow to the overflow valve and leak away at the overflow valve to achieve an idle state.

[0046] 2. Improvement status

[0047] Reference Figure 1 In the lifting state, a large amount of hydraulic oil is required at the oil cylinder to achieve lifting. Compared with the initial state, the valve core 310 of the main valve 300 moves in the valve channel, so that the compensation valve 100 is connected with the main valve 300 core, and the main valve 300 core is connected with the oil cylinder through the second oil channel and the third oil channel. At this time, the oil enters the compensation valve 100 from the oil inlet 800, and part of the hydraulic oil enters the non-spring end of the compensation valve 100 as the pilot oil. After the hydraulic oil passes through the main valve 300 core, part of the oil enters the spring end of the compensation valve 100 through the pilot hole, and becomes the pilot oil of the compensation valve 100 and the pressure oil of the LS port. Most of the oil in the main valve 300 passes through the third oil channel, pushes open the check valve 600 and enters the A chamber of the oil cylinder. The pressure in the A chamber is greater than that in the B chamber, so that the oil cylinder rod in the oil cylinder extends, driving the agricultural implement on it to complete the lifting action. A small part of the oil enters the spring end of the check valve 600 through the small hole, and acts as a pilot oil to ensure that the check valve 600 can achieve the load holding function. At the same time, with the movement of the oil cylinder rod, the oil in the B chamber returns, and the return oil flows directly back to the oil tank through the second oil channel.

[0048] 3. Descending state

[0049] Reference Figure 2 In the descending state, the valve core 310 of the main valve 300 changes direction, and the hydraulic oil enters the compensation valve 100 from the oil inlet 800, and part of the oil enters the non-spring end of the compensation valve 100 as the pilot oil. When the hydraulic oil flows through the main valve 300, a small part of the oil enters the spring end of the compensation valve 100 through the pilot hole, becoming the pilot oil of the compensation valve 100 and the LS port pressure oil. Most of the oil pushes the check valve 600 open and enters the B chamber of the oil cylinder, making the pressure in the B chamber greater than that in the A chamber, the oil cylinder rod retracts, and the agricultural implement descends. The pilot oil in the check valve 600 flows out from the small hole in the valve body, and the return oil in the A chamber overcomes the spring force to push the valve core 310 of the check valve 600 open and flow back to the oil tank.

[0050] 4. Floating state

[0051] Reference Figure 3When in the floating state, the oil in the oil inlet 800 flows directly back to the oil tank, that is, the multi-way valve does not supply oil to the oil cylinder. The A chamber and the B chamber of the oil cylinder are connected to the oil tank at the same time. The state of the oil cylinder is affected by the external force. With the change of the external force, the oil in the A chamber of the oil cylinder or the oil in the B chamber returns to the oil, so that the agricultural implement can float correspondingly with the change of the external force.

[0052] Specifically, the agricultural machinery multi-way valve proposed in this scheme is also provided with a motor 700 in a preferred embodiment. The motor 700 is a forward and reverse motor and is rigidly connected to the valve core 310 of the main valve 300, and can drag or compress the spring to control the stroke of the valve core 310. Through the forward and reverse rotation of the motor 700, the displacement direction of the valve core 310 of the main valve 300 is controlled to ensure that the valve core 310 can accurately move to the specified working position. By providing the motor 700, it is convenient for the multi-way valve to perform different tests and inspections, and its controllability can also be improved during use.

[0053] Preferably, the one-way valve 600 used in this solution is a conical sealing one-way valve 600. The conical sealing structure achieves a sealing effect through the contact between two conical surfaces. When the two conical surfaces are fitted, the pressure per unit area is relatively large due to the relatively small contact area, thereby producing a reliable sealing effect. In addition, the conical valve core 310 has a small flow resistance after the one-way valve 600 is opened in the forward direction, which can increase the speed at which the hydraulic oil flows to the cylinder.

[0054] The main function of the compensation valve 100 in this solution is to compensate for the pressure in the hydraulic system and stabilize the overall system pressure. It ensures that the hydraulic system can maintain a constant pressure even when the load or hydraulic pump output changes by accurately adjusting the flow of hydraulic oil in the system. When the system pressure exceeds the preset value, the compensation valve 100 will open, allowing part of the liquid to flow back to the tank, thereby reducing the system pressure; conversely, when the system pressure is lower than the preset value, the valve will close, preventing the liquid from flowing back to the tank to maintain the stability of the system pressure. This automatic adjustment function makes the hydraulic system in the multi-way valve more stable.

[0055] The present solution also proposes a multi-way valve working joint structure, which includes the agricultural machinery multi-way valve structure as above. Specifically, the specific structure of the agricultural machinery multi-way valve structure refers to the above embodiment. Since the multi-way valve working joint structure adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0056] The present solution also proposes an agricultural machinery, which includes the agricultural machinery multi-way valve structure as above. Specifically, the specific structure of the agricultural machinery multi-way valve structure refers to the above embodiment. Since the agricultural machinery adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0057] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A multi-way valve for agricultural machinery, characterized in that: include: Compensation valve (100); a first oil circuit (200), the first oil circuit (200) being connected to the compensation valve (100); a main valve (300), the main valve (300) being in communication with the compensation valve (100) via the first oil passage (200); a second oil circuit (400), wherein the second oil circuit (400) connects the main valve (300) and a load; a third oil circuit (500), the third oil circuit (500) connecting the main valve (300) and a load; One-way valve (600), two one-way valves (600) are provided, and are respectively located in the second oil circuit (400) and the third oil circuit (500).

2. The agricultural machinery multi-way valve according to claim 1, characterized in that: It also includes a motor (700), wherein the motor (700) is drivingly connected to the main valve (300).

3. The agricultural machinery multi-way valve according to claim 2, characterized in that: The motor (700) is a forward and reverse motor.

4. The agricultural machinery multi-way valve according to claim 2, characterized in that: The motor (700) is rigidly connected to the valve core (310) of the main valve (300).

5. The agricultural machinery multi-way valve according to claim 1, characterized in that: The one-way valve (600) is a conical seal.

6. The agricultural machinery multi-way valve according to claim 1, characterized in that: The compensation valve (100) is connected to the oil tank.

7. A multi-way valve working joint structure, characterized in that: The working joint includes an agricultural machinery multi-way valve as described in any one of claims 1-6.

8. The multi-way valve working joint structure according to claim 7, characterized in that: The working joint structure further comprises a relief valve, and the relief valve is connected to the compensation valve (100).

9. The multi-way valve working joint structure according to claim 7, characterized in that: include: Four working joints, each of which is provided with a load holding valve and a compensator; Lifting joint, including hydraulically controlled non-return valve; Oil inlet union, including compensator.

10. An agricultural machine, characterized in that: The agricultural machinery comprises the agricultural machinery multi-way valve according to any one of claims 1-6.

Images