CN209976952U

CN209976952U - Multifunctional valve bank for agricultural machinery

Info

Publication number: CN209976952U
Application number: CN201920861746.XU
Authority: CN
Inventors: 肖西华; 金冬富
Original assignee: WENLING KINDON ENGINEERING MACHINERY MANUFACTURING Co Ltd
Current assignee: WENLING KINDON ENGINEERING MACHINERY MANUFACTURING Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-01-21
Anticipated expiration: 2029-06-10

Abstract

The utility model provides an agricultural machinery is with multi-functional valves belongs to hydraulic pressure mechanical equipment technical field. It has solved current when the harvester turns to or unloads the grain, and the interior fluid refluence of header valve can produce the negative pressure and make the check valve not hard up, the problem that header operating stability reduces. The multifunctional valve set for the agricultural machinery is characterized in that a valve shaft, a valve rod, an oil inlet joint, a first check valve and a second check valve are arranged in a header valve, a flow passage is formed among the oil inlet joint, the second check valve and the first check valve, a rodless cavity of the valve shaft is communicated with a control valve port, a rod cavity is communicated with the flow passage, a plurality of oil holes communicated with an external cavity are formed in the first check valve, the end face of the second check valve is abutted against the first check valve, a valve plate for controlling one-way circulation of the flow passage is arranged at the end part of the second check valve, and a spring is arranged between the second check valve and the oil. The utility model discloses a two check valves set up the effectual problem of having solved the header valve backward flow side by side, make the advantage that the whole operation of valves is more stable.

Description

Multifunctional valve bank for agricultural machinery

Technical Field

The utility model belongs to the technical field of hydraulic pressure mechanical equipment, a multiple unit valve is related to, in particular to multifunctional valve group for agricultural machinery.

Background

In an agricultural machine, particularly a harvester, a steering valve, a header valve and a grain unloading valve are mainly matched for integrated control, in conventional application, the valves are independently controlled by arranging corresponding oil cylinders, so that the production cost of enterprises with a large number of oil cylinders is high, in order to reduce the cost, the control of arranging the valves in a valve body through one main oil cylinder is the most common technical means at present, but the valves are integrated, so that the following problems are easy to occur.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind and effectively prevent in the valves of integration setting that fluid refluence phenomenon takes place, make the better multi-functional valves of agricultural machinery of its overall stability.

The purpose of the utility model can be realized by the following technical proposal: the multifunctional valve set for the agricultural machinery comprises a valve body, a steering valve, a header valve and a grain unloading valve, wherein the steering valve, the header valve and the grain unloading valve are arranged in the valve body, and an oil inlet and an oil return opening are further formed in the valve body.

This multifunctional valve group for agricultural machinery's technical effect does: hydraulic oil enters the header valve through the oil inlet connector, flows through the check valve II in sequence, the check valve I is internally provided with a cavity where the check valve I enters through the oil hole, when the control valve port pushes the valve shaft to move towards the rod cavity through the rodless cavity, the check valve I is opened, oil flows to enable the valve rod to operate, when the control valve port is closed, the check valve I enables the oil to be stopped through the action of the spring, further, the action of the valve plate on the check valve II is mainly used for controlling the oil to flow from the check valve II to the check valve I in a one-way mode, through the structural design, when oil backflow generates negative pressure, the valve plate can be closed, and the oil in the check valve I is prevented from flowing back.

In the multifunctional valve set for agricultural machinery, a valve seat is arranged between the first check valve and the valve shaft.

In the multifunctional valve bank for agricultural machinery, the header valve is provided with an oil return joint communicated with the oil return port.

Compared with the prior art, this multi-functional valves for agricultural machinery sets up the effectual problem of having solved the header valve backward flow through two check valves side by side, makes the whole operation of valves more stable.

Drawings

Fig. 1 is a schematic structural view of the multifunctional valve set.

Fig. 2 is a cross-sectional view of the header valve.

In the figure, 1, a valve body; 2. a steering valve; 3. a header valve; 4. a grain unloading valve; 5. an oil inlet; 6. an oil return port; 7. a valve stem; 8. a valve shaft; 9. an oil inlet joint; 10. a one-way valve I; 11. a second one-way valve; 12. a control valve port; 13. an oil hole; 14. a valve plate; 15. a spring; 16. a valve seat; 17. an oil return joint.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the multifunctional valve set for the agricultural machinery comprises a valve body 1, a steering valve 2, a header valve 3 and a grain unloading valve 4, wherein the steering valve 2, the header valve 3 and the grain unloading valve 4 are arranged in the valve body 1, an oil inlet 5 and an oil return opening 6 are further arranged on the valve body 1, a valve shaft 8, a valve rod 7, an oil inlet joint 9, a first check valve 10 and a second check valve 11 are arranged in the header valve 3, a flow passage is formed among the oil inlet joint 9, the second check valve 11 and the first check valve 10, a rodless cavity of the valve shaft 8 is communicated with a control valve port 12, a rod cavity is communicated with the flow passage, a plurality of oil holes 13 communicated with an external cavity are formed in the first check valve 10, the end face of the second check valve 11 abuts against the first check valve 10, a valve plate 14 for controlling one-way circulation of the flow.

In more detail, a valve seat 16 is arranged between the first check valve 10 and the valve shaft 8, and the valve seat 16 is designed to enable the matching surface of the first check valve 10 to be contacted more tightly.

Furthermore, an oil return joint 17 communicated with the oil return opening 6 is arranged on the header valve 3.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms valve body 1, diverter valve 2, header valve 3, dump valve 4, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A multifunctional valve set for agricultural machinery comprises a valve body (1), a steering valve (2), a header valve (3) and a grain unloading valve (4) which are arranged in the valve body (1), wherein the valve body (1) is also provided with an oil inlet (5) and an oil return opening (6), and is characterized in that a valve shaft (8), a valve rod (7), an oil inlet joint (9), a one-way valve I (10) and a one-way valve II (11) are arranged in the header valve (3), a flow passage is formed among the oil inlet joint (9), the one-way valve II (11) and the one-way valve I (10), a rodless cavity of the valve shaft (8) is communicated with a control valve port (12), a rod cavity is communicated with the flow passage, a plurality of oil holes (13) communicated with an external cavity are formed in the one-way valve I (10), the end face of the one-way valve II (11) is abutted against the one-way valve I (10), and a valve plate (14) for controlling one-way circulation is arranged at the, and a spring (15) is arranged between the check valve II (11) and the oil inlet joint (9).

2. The multifunctional valve bank for the agricultural machinery as claimed in claim 1, wherein a valve seat (16) is arranged between the first check valve (10) and the valve shaft (8).

3. The multifunctional valve bank for the agricultural machinery as claimed in claim 1, wherein the header valve (3) is provided with an oil return joint (17) communicated with the oil return port (6).