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Pilot-operated high-pressure stop valve

A shut-off valve and pilot-operated technology, applied in the field of shut-off valves, can solve the problems of complex structure, high manual manipulation intensity, large volume and weight and difficult to popularize, and achieve the effect of smooth transition and guaranteed linear performance.

Inactive Publication Date: 2010-01-27
北京天龙万安科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the direct-acting globe valve and the existing pilot-operated globe valve due to their complex structure, high manual operation strength, and large volume and weight, this invention provides a new structure

Method used

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  • Pilot-operated high-pressure stop valve
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Examples

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Embodiment Construction

[0014] exist figure 1 Among them, the main spool 1 is pottery empty in the middle, and the pilot spool 3 is put into it to form the pilot valve opening A. At the same time, the retaining ring 4, the guide sleeve 5 and the spring retaining ring 6 are installed for transition and cooperation. The spring seat I 7 extends into the main spool 1 and contacts the guide sleeve 5, and the spring force of the return spring 8 acts on the pilot spool 3 through the retaining ring 4, and the pilot spool 3 is pressed against the main spool 1. These components are installed in the valve body 2, and the main valve core 1 and the valve body 2 form the main valve opening B. The distance δ between the guide sleeve 5 and the spring ring 6 is the opening stroke of the pilot valve. The external force acting on the rear end of the pilot spool is the opening control force F of the valve. P1 is the primary pressure of the fluid at the inlet of the valve, and P2 is the secondary pressure of the fluid ...

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Abstract

The invention discloses a pilot-operated high-pressure stop valve structure. A pilot-operated valve bush is sleeved in a primary spool. A return spring generates a compression pressure for the pilot-operated spool through a spring seat, a guide sleeve and a check ring and also generates a compression pressure to the primary spool. When the pilot-operated high-pressure stop valve is opened, an operating force applied to the pilot-operated spool firstly opens the pilot-operated spool and then opens the primary spool under the actions of the check ring, the guide sleeve and a spring ring washer on the primary spool after the pilot-operated spool is opened to a designed opening travel. Because of simple structure, an adopted serial suit structure and few parts, the pilot-operated high-pressure stop valve structure is small in volume, light in weight, low in operating force and good in flux linearity and is particularly applied to hand-held high-flow high-pressure fire-fighting lances and spray pistols.

Description

Technical field [0001] The invention relates to the mechanical structure design of a manual cut-off valve in fluid transmission occasions with large flow, high pressure and rapid opening and closing. The cut-off valve with this structure can achieve the characteristics of small structure volume, light weight, labor-saving operation and good flow linearity. It is suitable for hydraulic, pneumatic and water hydraulic transmission fields, especially for stop valves of fire water guns and spray guns. Background technique [0002] At present, most of the manual shut-off valves used in high-pressure and large-flow situations adopt a direct-acting valve structure. Due to the large pressure difference and back pressure when opening, the operating force is large and the flow control stability is poor. A small number of pilot-operated structures are used, and the pilot valve and the main valve are separated. The structure is complex and cumbersome, the volume and weight are large, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/36F16K27/02F16K31/44A62C31/02
Inventor 颜辉
Owner 北京天龙万安科技发展有限公司
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