Electromagnetic multi-way valve with priority working unit for harvester

Abstract

The utility model discloses an electromagnetic multi-way valve with a priority working unit for a harvester. The problems that an existing harvester hydraulic system cannot achieve composite action and is low in grain efficiency are solved. The device comprises a main oil inlet and an oil return port, the priority link comprises a priority oil port and a priority valve rod; the priority valve is arranged on the oil inlet unit, and an oil outlet of the priority valve is respectively connected with the priority unit, the working unit, the priority valve control cavity and the priority valve spring cavity; the elastic force in the priority valve spring cavity, the pressure oil of the priority oil port and the pressure oil of the priority valve control cavity are matched with one another to control the opening size of the priority valve; the throttle valve is arranged on the oil inlet unit and is used for controlling the flow of the priority unit; and the shuttle valve is arranged on the oil inlet unit, selects the pressure oil of the priority oil port on the priority unit and conveys the pressure oil to the priority valve spring cavity. According to the utility model, the priority link is added, the granary can be controlled to act through the connection of the priority link and the granary, the composite action and the priority of the priority link can be realized through the arrangement of the priority valve, and the efficiency of the whole machine is improved.

Description

Technical Field

[0001] The utility model relates to a harvester multi-way valve, in particular to an electromagnetic multi-way valve with a priority working link for a harvester. Background Art

[0002] With the rapid development of the agricultural economy, agricultural mechanization has also developed rapidly. The harvester is an integrated machine for harvesting crops, and its actions and movements are usually controlled by a hydraulic system. The harvester hydraulic system includes a power source gear pump, a diverter valve, a steering gear multi-way valve, etc. The oil circuit is output from the gear pump to the diverter valve, and the diverter valve is output to the steering gear to control the direction and / or output to the multi-way valve to control each actuator. The multi-way valve of the existing harvester is usually in parallel state, and the hydraulic oil is preferentially used for the working link with low load, and compound action control cannot be achieved. Moreover, since some OEMs require a constant speed, this must be accomplished with a constant flow of hydraulic oil. If the existing hydraulic system is to meet this requirement, it must add components separately. The modification is time-consuming and labor-intensive, and the modification cost is high, and it is urgently needed to be solved. Utility Model Content

[0003] In order to solve the problem that the existing harvester hydraulic system in the background technology cannot realize compound actions and has low grain efficiency, the utility model provides an electromagnetic multi-way valve for a harvester with a priority working link.

[0004] The technical solution of the utility model is: an electromagnetic multi-way valve for a harvester with a priority working joint, comprising a main oil inlet, an oil return port and a valve body, wherein the valve body comprises an oil inlet joint and at least one working joint, each working joint comprises a working reversing valve and a working oil port, and further comprises:

[0005] A priority connection, including a priority oil port connected to a grain bin of a harvester for actuating the grain bin of the harvester and a priority valve stem for controlling the priority oil port;

[0006] The priority valve is arranged on the oil inlet connection, the main oil inlet is connected to the oil inlet of the priority valve, and the oil outlet of the priority valve is respectively connected to the priority connection, the working connection, the priority valve control chamber, and the priority valve spring chamber; the elastic force in the priority valve spring chamber, the pressure oil of the priority oil port and the pressure oil of the priority valve control chamber cooperate with each other to control the opening size of the priority valve;

[0007] The throttle valve is arranged on the oil inlet joint, the oil inlet of the throttle valve is connected to the oil outlet of the priority valve, and the oil outlet of the throttle valve is connected to the priority joint, so as to realize the control of the flow of the priority joint;

[0008] The shuttle valve is installed on the oil inlet connection and selects the pressure oil from the priority oil port on the priority connection to be delivered to the spring chamber of the priority valve.

[0009] As an improvement of the utility model, the throttle valve is an adjustable throttle valve.

[0010] As an improvement of the utility model, it also includes at least one working unloading valve, which is arranged on the working link and has a first position of being cut off and a second position of being opened so that the oil outlet of the priority valve is connected with the oil return port.

[0011] As an improvement of the utility model, it also includes

[0012] A first throttle port is provided between the oil outlet of the priority valve and the spring chamber of the priority valve;

[0013] The second throttle port is arranged between the oil outlet of the priority valve and the control chamber of the priority valve; the opening of the first throttle port is smaller than the opening of the second throttle port.

[0014] As an improvement of the utility model, it also includes a safety overflow valve, which is arranged between the oil outlet of the shuttle valve and the oil return port.

[0015] As an improvement of the utility model, it also includes a third throttle port, which is arranged between the oil outlet of the shuttle valve and the spring chamber of the priority valve, and the safety relief valve is selectively arranged between the third throttle port and the oil return port.

[0016] As an improvement of the utility model, it also includes a main overflow valve, which is arranged between the main oil inlet and the oil return port.

[0017] As an improvement of the utility model, it also includes a main unloading valve, which is arranged on the oil inlet connection. The main unloading valve has a first position of being cut off and a second position of being opened so that the main oil inlet port is connected with the oil return port.

[0018] As an improvement of the utility model, the opening pressure of the main overflow valve is greater than the opening pressure of the safety overflow valve, and the main overflow valve is arranged in parallel with the main unloading valve.

[0019] As an improvement of the utility model, the priority valve is detachably connected to the valve body by means of threads, the priority joint and the working joint are arranged on both sides of the oil inlet joint. As a further improvement of the utility model, the sealing member is a combined graphite ring packing.

[0020] The beneficial effect of the utility model is that a priority connection is added, and the action of the granary can be controlled by connecting the priority connection with the granary. Through the setting of the priority valve, compound actions can be realized and priority of the priority connection can be realized, thereby improving the efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 The hydraulic principle diagram of the embodiment of the utility model.

[0022] Attached Figure 2 It is a hydraulic principle diagram of the oil inlet connection and the priority connection of the embodiment of the utility model.

[0023] Attached Figure 3 This is a hydraulic principle diagram of the priority valve in an embodiment of the utility model.

[0024] In the figure, 1, oil inlet connection; 2, working connection; 21, working reversing valve; 22, working oil port; 3, priority connection; 31, priority oil port; 32, priority valve stem; 4, priority valve; 5, throttle valve; 6, shuttle valve; 7, working unloading valve; 8, first throttle port; 9, second throttle port; 10, safety relief valve; 11, third throttle port; 12, main relief valve; 13, main unloading valve;

[0025] P, main oil inlet; T, oil return port. DETAILED DESCRIPTION

[0026] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0027] Depend on Figure 1 Combination Figure 2-3 As shown, a solenoid multi-way valve for a harvester with a priority working link includes a main oil inlet P, an oil return port T and a valve body, wherein the valve body includes an oil inlet link 1 and at least one working link 2, each working link includes a working reversing valve 21 and a working oil port 22, and further includes:

[0028] The priority link 3 includes a priority oil port 31 connected to the harvester grain bin for the harvester grain bin action and a priority valve stem 32 for controlling the priority oil port;

[0029] The priority valve 4 is arranged on the oil inlet connection. The main oil inlet is connected to the oil inlet of the priority valve, and the oil outlet of the priority valve is respectively connected to the priority connection, the working connection, the priority valve control chamber, and the priority valve spring chamber; the elastic force in the priority valve spring chamber, the pressure oil of the priority oil port and the pressure oil of the priority valve control chamber cooperate with each other to control the opening size of the priority valve; the priority valve is mainly used to ensure that the system flow prioritizes the lifting and lowering actions of the granary. The oil outlet of the priority valve is respectively connected to the priority valve control chamber and the priority valve spring chamber to achieve dynamic balance and higher control sensitivity.

[0030] The throttle valve 5 is arranged on the oil inlet connection, the oil inlet of the throttle valve is connected to the oil outlet of the priority valve, and the oil outlet of the throttle valve is connected to the priority connection, so as to realize the control of the flow rate of the priority connection;

[0031] The shuttle valve 6 is arranged on the oil inlet, and the pressure oil of the priority oil port on the priority link is selected and delivered to the priority valve spring chamber. The beneficial effect of the utility model is that the priority link is added, and the action of the grain bin can be controlled by connecting the priority link with the grain bin. By setting the priority valve, a compound action can be realized and the priority link priority can be realized, thereby improving the efficiency of the whole machine. Specifically, the priority link is used to control the lifting and lowering of the grain bin of the harvester, and the lifting and turning of the grain bin can be realized synchronously during the grain unloading action, thereby improving the working efficiency of the whole machine. The oil inlet of the priority valve is the main oil inlet of the whole valve, and the oil outlet of the priority valve is the priority oil outlet. Through the adjustable throttle valve, the set flow rate is preferentially supplied to the lifting (lowering) working link (priority link) of the grain unloading barrel. The working link pressure is picked up to the priority valve through the pressure taking port, and the priority valve is adjusted to keep the inlet and outlet oil pressure difference (ΔP) of the throttle valve constant. After the throttle valve is adjusted, the oil flow area (A) of the oil inlet and outlet of the throttle valve is fixed, and the pressure difference (ΔP) between the inlet and outlet of the throttle valve is ensured to be constant through the priority valve. It can be seen from the flow formula that when the pressure difference (ΔP) and the oil flow area (A) are fixed, the flow through the throttle valve remains constant and does not change with the pressure of the working link, which can achieve flow control of the priority link, and therefore the flow to the working link can also be controlled.

[0032] The throttle valve is an adjustable throttle valve. The throttle valve of the utility model is used to control the priority flow and can be manually adjusted according to the use requirements.

[0033] The utility model also includes at least one working unloading valve 7, which is arranged on the working connection. The working unloading valve has a first position of being cut off and a second position of being opened so that the oil outlet of the priority valve is connected to the oil return port. Specifically, when the power is on, the working unloading valve is in the cut-off state; when the power is off, the working unloading valve is in the unloading state; of course, the reverse operation can also be performed in the actual production process.

[0034] The utility model also includes

[0035] The first throttle port 8 is provided between the oil outlet of the priority valve and the spring chamber of the priority valve;

[0036] The second throttle port 9 is provided between the priority valve oil outlet and the priority valve control chamber; the opening of the first throttle port is smaller than the opening of the second throttle port. The priority valve oil outlet is connected to the priority valve spring chamber and the priority valve control chamber through the first throttle port and the second throttle port respectively, and the pressure oil enters the priority valve control chamber and the spring chamber to achieve dynamic balance, and the control sensitivity is higher.

[0037] The utility model also includes a safety relief valve 10, which is arranged between the oil outlet of the shuttle valve and the oil return port, so that the pressure of the control oil circuit can be limited, making the product safer.

[0038] The utility model also includes a third throttle port 11, which is arranged between the oil outlet of the shuttle valve and the spring chamber of the priority valve, and the safety relief valve is arranged between the third throttle port and the oil return port to limit the flow of the control oil circuit and ensure that the control oil circuit can be smoothly operated.

[0039] The utility model further comprises a main overflow valve 12, which is arranged between the main oil inlet and the oil return port. The main overflow valve is used to limit the whole valve pressure from being too high, thereby ensuring the safety of the hydraulic system and making the product safer.

[0040] The utility model also includes a main unloading valve 13, which is arranged on the oil inlet connection. The main unloading valve has a first position of being cut off and a second position of being opened so that the main oil inlet is connected to the oil return port. When the power is on, the main unloading valve is in the cut-off state; when the power is off, the main unloading valve is in the unloading state; of course, the reverse operation can also be performed in the actual production process.

[0041] The opening pressure of the main relief valve is greater than the opening pressure of the safety relief valve. The main relief valve is arranged in parallel with the main unloading valve. The priority connection and the working connection are arranged on both sides of the oil inlet connection. Specifically, the priority valve is detachably connected to the valve body by means of threads. This facilitates the disassembly and assembly of the priority valve, has a simple structure, and is convenient and reliable to control.

[0042] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0044] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.

Claims

1. An electromagnetic multi-way valve for a harvester with a priority working joint, comprising a main oil inlet, an oil return port and a valve body, wherein the valve body comprises an oil inlet joint and at least one working joint, each working joint comprises a working reversing valve and a working oil port, characterized in that Also included: A priority connection, including a priority oil port connected to a grain bin of a harvester for actuating the grain bin of the harvester and a priority valve stem for controlling the priority oil port; The priority valve is arranged on the oil inlet connection, the main oil inlet is connected to the oil inlet of the priority valve, and the oil outlet of the priority valve is respectively connected to the priority connection, the working connection, the priority valve control chamber, and the priority valve spring chamber; the elastic force in the priority valve spring chamber, the pressure oil of the priority oil port and the pressure oil of the priority valve control chamber cooperate with each other to control the opening size of the priority valve; The throttle valve is arranged on the oil inlet joint, the oil inlet of the throttle valve is connected to the oil outlet of the priority valve, and the oil outlet of the throttle valve is connected to the priority joint, so as to realize the control of the flow of the priority joint; The shuttle valve is installed on the oil inlet connection and selects the pressure oil from the priority oil port on the priority connection to be delivered to the spring chamber of the priority valve.

2. The electromagnetic multi-way valve for a harvester with a priority working joint according to claim 1, characterized in that The throttle valve is an adjustable throttle valve.

3. The electromagnetic multi-way valve for a harvester with a priority working joint according to claim 1, characterized in that It also includes at least one working unloading valve, which is arranged on the working link and has a first position of being cut off and a second position of being opened so that the oil outlet of the priority valve is connected with the oil return port.

4. The electromagnetic multi-way valve for a harvester with a priority working joint according to claim 1, characterized in that Also includes A first throttle port is provided between the oil outlet of the priority valve and the spring chamber of the priority valve; The second throttle port is arranged between the oil outlet of the priority valve and the control chamber of the priority valve; the opening of the first throttle port is smaller than the opening of the second throttle port.

5. The electromagnetic multi-way valve for a harvester with a priority working joint according to claim 1, characterized in that It also includes a safety relief valve, which is arranged between the oil outlet of the shuttle valve and the oil return port.

6. The electromagnetic multi-way valve for a harvester with a priority working link according to claim 5, characterized in that It also includes a third throttle port, which is arranged between the oil outlet of the shuttle valve and the spring chamber of the priority valve. The safety overflow valve is selectively arranged between the third throttle port and the oil return port.

7. The electromagnetic multi-way valve for a harvester with a priority working link according to claim 5, characterized in that It also includes a main overflow valve, which is arranged between the main oil inlet and the oil return port.

8. The electromagnetic multi-way valve for a harvester with a priority working link according to claim 7, characterized in that It also includes a main unloading valve, which is arranged on the oil inlet connection. The main unloading valve has a first position of being cut off and a second position of being opened so that the main oil inlet port is connected with the oil return port.

9. The electromagnetic multi-way valve for a harvester with a priority working link according to claim 8, characterized in that The opening pressure of the main relief valve is greater than the opening pressure of the safety relief valve, and the main relief valve is arranged in parallel with the main unloading valve.

10. The electromagnetic multi-way valve for a harvester with a priority working joint according to claim 1, characterized in that The priority valve is detachably connected to the valve body by means of threads, and the priority joint and the working joint are arranged on both sides of the oil inlet joint.

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