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Unloading one-way valve

A one-way valve, valve body technology, applied in the direction of control valve, valve device, functional valve type, etc., can solve problems such as large power loss of hydraulic pump

Inactive Publication Date: 2016-03-02
CHONGQING SHANNENG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention intends to provide an unloading check valve to solve the problem of large power loss of the hydraulic pump of the hydraulic system of the header of the harvester during operation

Method used

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  • Unloading one-way valve

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Embodiment Construction

[0011] The present invention will be described in further detail below by means of specific embodiments:

[0012] The reference signs in the accompanying drawings include: valve body 1, spring 2, cone valve 3, cone valve seat 4, control piston 5, unloading ring groove 6, throttle hole 7, piston cavity 8, oil inlet A1, Control oil port B1 and oil outlet A2.

[0013] The embodiment is basically as attached figure 1 Shown: the unloading check valve of this embodiment, the valve body has a hollow chamber, the chamber is divided into a left chamber and a right chamber, the left chamber and the right chamber communicate through the connecting hole in the middle, the left chamber There is an oil outlet on the chamber, an oil inlet on the left side of the control piston on the right chamber, a ring groove on the oil inlet on the side wall of the right chamber, and a control valve on the right side of the piston. The oil port has a concave ring groove on the side of the control pisto...

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Abstract

The invention discloses an unloading one-way valve in order to solve the problem that the operating power loss of a hydraulic pump of a hydraulic system of a cutting table of a harvester is large. The unloading one-way valve comprises a valve body. A left cavity and a right cavity are formed in the valve body. The left cavity and the right cavity are communicated through a middle connecting hole. An annular valve seat is arranged at the connecting hole. A valve element capable of opening and closing the valve seat is arranged in the left cavity. An oil outlet is formed in the left cavity. A control piston used for controlling the valve element to open and close is arranged in the right cavity. An oil inlet is formed in the position, located on the left side of the control piston, of the right cavity. A control oil port is formed in the position, located on the right side of the piston, of the right cavity. Two oil holes are formed in the valve element. A piston cavity is formed in the control piston. A circle of unloading ring groove is formed in the periphery of the control piston. The unloading ring groove is provided with throttling oil holes communicated with the piston cavity.

Description

technical field [0001] The invention relates to valve technology, in particular to an unloading check valve. Background technique [0002] The lifting of the header of the harvester is usually controlled by hydraulic pressure, and the plunger type hydraulic cylinder is usually used in the hydraulic system, and the slide valve type reversing valve is simple in structure and low in cost, so the slide valve is often used to control the movement of the plunger type cylinder Type reversing valve, but the spool type reversing valve will inevitably bring about internal leakage of the valve due to the fit gap between the valve stem and the valve hole. The current practice is to install an ordinary hydraulic control check valve at the oil inlet of the plunger cylinder. Although this solves the internal leakage problem of the slide valve reversing valve, since the hydraulic pump of the system is in the pilot overflow The valve works under the pressure set by the valve, but the set pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06F15B13/02
CPCF16K15/063F15B13/027
Inventor 李立光
Owner CHONGQING SHANNENG INSTR
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