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Pilot operated globe valve

A shut-off valve and pilot-operated technology, applied in servo motor components, fluid pressure actuation system safety, mechanical equipment, etc., can solve problems such as complex structure, bulky volume, and high cost

Active Publication Date: 2020-04-24
ZHEJIANG XINDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing pilot-operated globe valves, such as the DA-type pilot-operated globe valve produced by Bosch Rexroth Hydraulics Co., Ltd., Germany, are mostly plate valve structures, which are bulky, complex in structure, and high in cost, and are not suitable for highly integrated small walking In mechanical equipment; in addition, when the existing pilot-operated stop valve is applied to the hydraulic circuit of the accumulator, when the pressure of the accumulator reaches the set value, it will quickly switch the pump flow to the non-pressure bypass, due to the switching The hydraulic shock caused by fast speed is large and not soft

Method used

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] A pilot-operated shut-off valve according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Such as Figure 1 to Figure 4 As shown, the pilot-operated stop valve according to the embodiment of the present invention includes: valve sleeve 2, screw plug 11, one-way valve core 1, one-way spring 8c, retaining ring 15, unloading valve core 3, bushing 4, steel Ball 4a, spring 4b, unloading spring 8b, screw sleeve 9, adjusting rod 10, pilot spool 7, ...

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Abstract

The invention discloses a pilot type stop valve. The pilot type stop valve comprises a valve sleeve, a screw plug, a one-way valve element, a one-way valve spring, a check ring, an unloading valve element, a bush, a steel ball, a spring, an unloading spring, a screw sleeve, an adjusting rod, a pilot valve element, a pilot spring and a piston. The pilot type stop valve is compact in size, the machining is simple, the manufacturing cost is low, and flexible switching can be carried out.

Description

technical field [0001] The invention relates to a valve, in particular to a pilot-operated stop valve. Background technique [0002] Pilot-operated shut-off valves are widely used in hydraulic circuits with accumulators to switch the flow of the pump to a non-pressurized bypass when the set accumulator pressure is reached; other types of pilot-operated shut-off valves The application is for high / low pressure pump systems. In this application, when the pressure reaches the set high pressure value, the low pressure pump is switched to the non-pressurized bypass. Existing pilot-operated globe valves, such as the DA-type pilot-operated globe valve produced by Bosch Rexroth Hydraulics Co., Ltd., Germany, are mostly plate valve structures, which are bulky, complex in structure, and high in cost, and are not suitable for highly integrated small walking In mechanical equipment; in addition, when the existing pilot-operated stop valve is applied to the hydraulic circuit of the accum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F15B20/00
CPCF15B13/02F15B13/024F15B20/00
Inventor 不公告发明人
Owner ZHEJIANG XINDA VALVE