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Normally-closed proportional one-way flow valve

A flow valve and proportional technology, which is applied in the field of normally closed proportional one-way flow valve, can solve the problems of rising use cost and large volume of hydraulic valve group, etc.

Active Publication Date: 2018-02-23
上海申花电工器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The additional pressure compensator will inevitably lead to an increase in the cost of use and an increase in the volume of the hydraulic valve group, which is unacceptable to many customers; therefore, its structure needs to be further improved

Method used

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  • Normally-closed proportional one-way flow valve
  • Normally-closed proportional one-way flow valve
  • Normally-closed proportional one-way flow valve

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] Such as Figure 1 to Figure 3 Shown is the structural representation of the present invention,

[0019] The reference signs are: A port, B port, valve body 1, screw sleeve 2, first damping hole 2a, proportional electromagnet 31, armature 32, pilot valve core 5, protruding ring 51, spring 52, positioning sleeve 6 , throttle hole 6a, tapered hole 6b, pressure feedback chamber 61, hydraulic control chamber 62, valve sleeve 7, side oil hole 7a, lower oil hole 7b, main valve core 8, second damping hole 8a, first sealing ring 91 , The second sealing ring 92.

[0020] Such as Figure 1 to Figure 3 as shown,

[0021] A normally closed proportional one-way flow valve, including a valve body 1, which is provided with A port and B port, the upper part of the valve body 1 is screwed with a screw sleeve 2, and the upper part of the screw sleeve ...

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Abstract

The invention discloses a normally-closed proportional one-way flow valve comprising a valve body provided with an opening A and an opening B. A thread sleeve is connected to the upper portion of thevalve body in a threaded mode; a proportional electromagnet is assembled on the upper portion of the thread sleeve; an armature is arranged at the center of the proportional electromagnet; a spring isarranged on the large-hole-diameter part of an inner hole of the armature and enables a convex ring at the upper end of a pilot valve element in the thread sleeve to abut against a step of the innerhole; the lower end of the pilot valve element penetrates through a throttling hole in the center of a positioning sleeve; a pressure feedback cavity is formed in the upper portion of the throttling hole, and a hydraulic control cavity is formed in the lower portion of the throttling hole; a valve sleeve is arranged in the position, on the lower portion of the positioning sleeve, in the valve body; a main valve element is arranged at the center of the valve sleeve; a side oil hole communicating with the opening B and a lower oil hole communicating with the opening A are formed in the valve sleeve; a first damping hole communicating with the opening B is formed in the side wall of the thread sleeve; a second damping hole communicating with the lower oil hole is formed in the center of the main valve element; and the open degree of the throttling hole in the positioning sleeve is changed through up-down movement of the pilot valve element. The normally-closed proportional one-way flow valve has the advantage that the flow is kept stable when the load is changed.

Description

technical field [0001] The invention relates to the technical field of electromagnetic valve manufacturing, in particular to a normally closed proportional one-way flow valve. Background technique [0002] In recent years, proportional one-way flow valves have 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 stops, the proportional one-way flow valve plays the role of maintaining pressure to prevent the hydraulic cylinder from sliding down; when the equipment needs to descend, the proportional one-way flow valve controls the size of the opening according to the input voltage signal and adjusts the output flow of the hydraulic cylinder , and then control the descending speed of the lifting equipment. [0003] For example, the patent No. 201510807564.0 titled "a high-horsepower tractor lifter valve group" discloses a hydraulic valve group for controlling the tracto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/42F16K15/18
CPCF16K15/18F16K31/42
Inventor 陈艳艳
Owner 上海申花电工器材有限公司
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