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Piston-controlled reversing valve

A reversing valve and piston technology, which is applied in the field of hydraulic reversing valves, can solve the problems of high processing requirements, large pressure loss, energy waste, etc., and achieve the effects of wide versatility of parts, small hydraulic control force, and wide application occasions

Inactive Publication Date: 2013-01-16
SHANGHAI LIXIN HYDRAULIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the traditional hydraulic control valve body has many internal flow channels, there are also many flow holes on the bottom surface, the structure is more complicated, and the processing requirements are relatively high; in addition, the control oil of the traditional hydraulic control valve is input from the bottom connection surface and acts through the flow channel holes. The end face of the spool, thereby pushing the spool to change direction, because there is a certain fit gap between the spool and the valve body, the pressure loss during the changeover process is relatively large, resulting in a waste of energy

Method used

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Embodiment Construction

[0015] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0016] see figure 2 and image 3 , a piston-controlled reversing valve, mainly through the oil (air) pressure of the external control port X1 or X2 to push the valve core to move, so as to obtain the on-off of each oil (air) circuit, so as to realize the required function. The effective gap between the valve body 15 and the spool 14 ensures the reliability of the movement of the spool 14 . Back-up rings 13 and springs 12 are respectively arranged at both ends of the valve core 14, and the end face screw cap 10 is threadedly connected with the valve body 15, and a washer is set beside the multi-stage sealing ring 6 to seal the position, and the pin shaft passes through the passage of the end face screw plug 10. The holes correspond to the slid...

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Abstract

A piston-controlled reversing valve comprises a valve body; a valve core is arranged in the valve body, and is arranged in a main hole in the valve body; both ends of the valve core are provided with two pin shafts which are in contact with the end face of the valve core; both ends of the valve core are provided with restoring springs; both ends of the valve body are provided with end face screw-caps; the pin shafts run through the end face screw-caps; both ends of the valve body are connected with front caps; a piston is arranged in each front cap; the pin shafts contacts the pistons; and control oil ports are arranged on the outer side of the front caps. The control oil ports of the piston-controlled reversing valve are directly arranged on the two end caps; the pistons are driven by liquid or gas so as to drive the valve core to reverse. Due to the directly operated structure, the piston-controlled reversing valve is easy to machine and convenient to repair and disassemble.

Description

technical field [0001] The invention relates to the technical field of hydraulic products, in particular to a hydraulic reversing valve with piston control. Background technique [0002] The hydraulic reversing valve is a common directional reversing valve among hydraulic valves, and it is widely used in construction machinery, metallurgy, machine tools and industrial fields. It mainly controls the movement of the spool to obtain the required functional position, that is, the on-off situation between the oil ports. There are many ways to control the movement of the spool, including electromagnetic control, manual control, and hydraulic control. [0003] The structure of the traditional hydraulic control reversing valve is shown in the attached figure 1 . Since the traditional hydraulic control valve body has many internal flow channels, there are also many flow holes on the bottom surface, the structure is more complicated, and the processing requirements are relatively h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 袁才富张妮朱剑根沈至伟
Owner SHANGHAI LIXIN HYDRAULIC
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