Pilot type control valve

A control valve, pilot-operated technology, applied in the field of machinery, can solve the problem that the control valve cannot be applied, and achieve the effects of easy implementation, reduced opening torque, and smooth valve opening.

Inactive Publication Date: 2014-12-03
卓旦春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is mainly used for pressure system anti-overpressure safety relief, it is not applicable to regulating valves

Method used

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  • Pilot type control valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Such as figure 1 and figure 2 As shown, the pilot control valve includes a valve body 1 , a valve core 2 , a valve stem 3 and a handle 4 . The valve core 2 is located in the valve body 1, the inner end of the valve rod 3 is connected with the valve core 2, and the outer end of the valve rod 3 protrudes from the valve body 1 and is connected with the handle 4.

[0035] Such as image 3 and Figure 4 As shown, the spool 2 is cylindrical and sleeved on the valve stem 3. The valve stem 3 has a nut 5 that can abut on the bottom port of the spool 2 and a small spool that can abut on the top port of the spool 2. 6. In this embodiment, a large sealing ring 7 is sheathed on the outer side of the valve core 2 .

[0036] The spool 2 is located between the nut 5 and the small spool 6 and it can move between the two. There is a channel for the fluid medium to pass between the spool 2 and the valve stem 3. The small spool 6 and the top of the spool 2 There is a sealing structu...

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PUM

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Abstract

The invention provides a pilot type control valve which belongs to the field of mechanical technology and solves the problem that the existing pilot type safety valve is not applicable to a control valve. The pilot type control valve comprises a valve body, a valve core, a valve rod and a handle. The valve core is located inside the valve body and an inner end of the valve rod is connected with the valve core. An outer end of the valve rod extends out of the valve body to be connected with the handle. The valve core with a cylindrical shape is sheathed on the valve rod. The valve rod is provided with a nut and a small valve core, wherein the nut can abut against a bottom port of the valve core and the small valve core can abut against a top port of the valve core. The valve core is located between the nut and the small valve core and can move between them. There is a channel for fluid medium to pass through between the valve core and the valve rod. There is a sealing structure which can realize a seal between the small valve core and the top port of the valve core when the small valve core and the top port of the valve core contact each other. The pilot type control valve has the advantages of smooth opening, simple operationand the like.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a valve, in particular to a pilot control valve. Background technique [0002] After the valve is closed, when the pressure difference between the front and back of the valve reaches the limit high pressure, the opening torque of the valve will be very large. That is to say, when opening the valve, the rotation of the hand wheel is subject to greater resistance, and the operator cannot open the valve smoothly and quickly. [0003] In view of the above problems, the Chinese Patent Publication No. CN2037419U provides a "pilot safety valve", which consists of a main valve and a pilot valve as the main parts. The main valve disc acts on the main valve spring and the main valve pressure chamber, and the pilot valve is a double-spool valve with an inlet spool and an outlet spool. It can not lose the function of automatic opening and automatic closing when the pressure chamber of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K39/02
Inventor 卓旦春
Owner 卓旦春
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