Bidirectional control proportional one-way flow valve
A two-way control, flow valve technology, applied in the direction of lift valve, valve details, valve device, etc., can solve the problems of limiting the wide application of proportional one-way flow valve, high price of proportional valve, rising cost, etc., to reduce the difficulty of manufacturing process and The effect of manufacturing cost, simple structure and few parts
Active Publication Date: 2018-01-26
JIANGSU HUAZHAN PETROLEUM MASCH CO LTD
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Problems solved by technology
Due to the high price of proportional valves, the use of two proportional one-way flow valves will inevitably lead to an increase in cost, which limits the wide application of proportional one-way flow valves on some lower-priced mainframes
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[0037] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0038] The inventor noticed during the invention process that the existing proportional one-way flow valve can only realize one-way proportional flow control, which limits the application range of the proportional one-way flow valve.
[0039] In view of the above shortcomings, the embodiment of the present invention proposes a bidirectional control proportional one-way flow valve, which will be described below.
[0040] figure 1 One embodiment of the bi-dire...
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The invention provides a bidirectional control proportional one-way flow valve. The bidirectional control proportional one-way flow valve is characterized by comprising a proportional electromagnet, ascrew sleeve, an armature, a valve sleeve, a main valve core, a pilot valve sleeve 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 andan 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. The pilot valve sleeve is fixedly connected to the interior of the main valve core in a sleeving mode, and the pilot valve sleeve is provided with a pilot cavity and a third dampinghole. 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, the third damping hole and the pilot cavity, and a first conical surface, a cylindrical convex shoulder and a second conical surface are arranged at the position, corresponding to the second damping hole and the third damping hole, of the other end of the pilot valve core. The proportional one-way flow 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 bidirectional control 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. The proportional one-way flow valves currently on the market can only achieve one-way proportional flow control, that is to say, if the hydraulic oil can realize proportional flow control w...
Claims
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IPC IPC(8): F16K1/32F16K31/06F16K31/40F15B13/02
Inventor 陈艳艳
Owner JIANGSU HUAZHAN PETROLEUM MASCH CO LTD