a pressure reducing valve
A pressure reducing valve and spool technology, which is applied in the field of pressure reducing valves, can solve the problems of large overall volume of pressure reducing valves, decreased pressure control accuracy, and large specifications of pressure reducing springs, so as to improve convenience and accuracy and reduce stiffness , the effect of reducing the size of the structure
Active Publication Date: 2021-07-23
ZHEJIANG ANDEKAI FLUID EQUIP TECH CO LTD
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Problems solved by technology
However, in the existing pressure reducing valve, the pressure at the pressure reducing port directly acts on the pressure reducing valve core, and then compares it with the pressure reducing spring. If it works under working conditions, the size of the decompression spring required will be very large, which will not only cause the overall volume of the decompression valve to be larger and cost higher, but also cause difficulty in pressure adjustment and pressure due to the increase in spring stiffness. Decrease in Control Accuracy
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[0025] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] combine figure 1 As shown, the pressure reducing valve in this embodiment includes a valve body 1 , a first valve core 2 , a second valve core 3 , a control valve core 4 , a pretension unit 5 and a reset member 6 . Wherein, the valve body 1 adopts a cartridge valve body structure and is provided with a P port, an A port and a T port, and the A port is located between the P port and the T port along the axial direction.
[0027] The first valve core 2 is located inside the valve body 1 and can move back and forth in the axial direction relative to the valve body 1, thereby controlling the on-off of the A port and the P port. first connection hole. Among them, the upper end of the first spool 2 and the valve body 1 form a first oil chamber 11, and the first oil chamber 11 communicates with the A port, so that ...
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The invention belongs to the technical field of valve equipment. The invention discloses a pressure reducing valve, which comprises a valve body, a first valve core, a second valve core, a control valve core and a pre-tightening unit; the valve body is provided with a P port, an A port and a T port, and the first valve core , The second spool and the control spool are located in the valve body and can move relatively, the control spool runs through the first spool and the second spool, and the control spool is under the action of the oil pressure of port A and the pretightening force of the pretightening unit During the moving process, the first spool or the second spool can be driven to move respectively, so that the first spool controls the connection between the A port and the P port, and the second spool controls the connection between the A port and the T port. broken. The pressure reducing valve of the present invention is not only small in size and compact in structure, but also can realize convenient and precise adjustment for working conditions of large flow and high pressure, and realize precise control of pressure.
Description
technical field [0001] The invention belongs to the technical field of valve equipment, and in particular relates to a pressure reducing valve. Background technique [0002] The pressure reducing valve is one of the indispensable important components in the fluid circuit. The existing two-way pressure reducing valve and three-way pressure reducing valve are basically in the form of slide valves. However, when the decompression branch needs to maintain pressure or the load increases, due to the increase in the pressure of the working port, there will be leakage from the decompression port to the pressure relief port or the inlet, which will cause the working circuit to fail to achieve the pressure maintaining effect. At this time, the pressure must be maintained by means of an accumulator or a two-way cut-off solenoid valve, which will cause the structure of the entire system to be complicated and the cost to be increased. [0003] In addition, when the existing pressure red...
Claims
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IPC IPC(8): F15B13/02
CPCF15B13/025
Inventor 邵玉刚宋莱锋
Owner ZHEJIANG ANDEKAI FLUID EQUIP TECH CO LTD