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Proportional flow stop valve

A technology of cut-off valve and flow rate, which is applied in the direction of rising valve, valve details, valve device, etc., can solve the problems of expensive proportional valve, restricting the wide application of proportional flow stop valve, and rising cost, and achieves simple structure and reduced manufacturing process difficulty and manufacturing cost, the effect of fewer parts

Active Publication Date: 2018-01-26
ZHEJIANG XINDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of the proportional valve, the use of two proportional flow shut-off valves will inevitably lead to an increase in cost, which limits the wide application of proportional flow shut-off valves on some lower-priced mainframes

Method used

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Embodiment Construction

[0037] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. And in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In the course of the invention, the inventor noticed that the existing proportional flow cut-off valve can only realize unidirectional proportional flow control, which limits the application range of the proportional flow cut-off valve.

[0039] In view of the above shortcomings, the embodiment of the present invention proposes a proportional flow cut-off valve, which will be described below.

[0040] figure 1 One embodiment of the proportional flow cut-...

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Abstract

The invention provides a proportional flow stop valve. The proportional flow stop valve is characterized by comprising a proportional electromagnet, a screw sleeve, an armature, a valve sleeve, a mainvalve core and a pilot valve core. One end of the screw sleeve is connected with the proportional electromagnet, the armature is movably arranged in the screw sleeve, one end of the valve sleeve is fixedly connected to the other end of the screw sleeve, and the other end of the valve sleeve is provided with an oil port A and an oil port B. The main valve core is connected to the interior of the valve sleeve, and provided with a first damping hole communicating with the oil port B and a second damping hole communicating with the oil port A, and the diameter of the first damping hole is smallerthan the diameter of the second damping hole. One end of the pilot valve core is fixedly connected with the other end of the armature, the other end of the pilot valve core penetrates through a control cavity, a pilot cavity and the second damping hole, and a structure being small in middle and large at the two ends is formed at the position, corresponding to the second damping hole, of the otherend of the pilot valve core. The proportional flow stop valve is simple in structure, low in cost and capable of achieving bidirectional control.

Description

Technical field [0001] The invention relates to the technical field of valves, in particular to a proportional flow cut-off valve. Background technique [0002] In recent years, the proportional flow cut-off valve has been used more and more in lifting equipment such as truck mounted cranes, aerial work vehicles, tractor rotary plows, and electric forklifts. When the equipment is stopped, the proportional flow cut-off valve plays a role in maintaining pressure to prevent the hydraulic cylinder from sliding down; when the equipment needs to drop, the proportional flow cut-off valve controls the size of the opening according to the input voltage signal, adjusts the flow rate of the hydraulic cylinder, and then Control the descending speed of the lifting equipment. The proportional flow cut-off valve currently on the market can only achieve one-way proportional flow control, that is to say, if the hydraulic oil can achieve proportional flow control when it flows from port B of the ...

Claims

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Application Information

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IPC IPC(8): F16K1/32F16K31/06F16K31/40F15B13/02
Inventor 陈艳艳
Owner ZHEJIANG XINDA VALVE
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