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Pilot-operated self-locking globe valve

A pilot-operated, globe valve technology, applied in the field of globe valves, can solve the problems of easy wear of the sealing ring, high opening pressure, small opening pressure, etc., and achieve the effects of prolonging the service life, low production cost and simple structure

Inactive Publication Date: 2019-06-21
金洪水
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of high opening pressure and easy wear of the sealing ring in the prior art, the invention provides a pilot-operated self-locking shut-off valve with small opening pressure and the sealing ring is not easy to wear

Method used

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  • Pilot-operated self-locking globe valve
  • Pilot-operated self-locking globe valve
  • Pilot-operated self-locking globe valve

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Experimental program
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Embodiment 1

[0030] Pilot-operated self-locking globe valve, such as Figure 1 to Figure 10As shown, it also includes a cylinder 1, a valve body 2 connected to the cylinder 1, a valve stem 3 arranged in the cylinder 1 and the valve body 2, and a pilot valve core 4 connected to the lower end of the valve stem 3. The lower end of the valve stem 3 is provided with The main spool 5 is set on the valve stem 3, the main spool 5 can move up and down on the valve stem 3, the main spool 5 is set above the pilot spool 4, the cylinder diameter of the pilot spool 4 is smaller than the main spool 5 cylinder diameter, the lower end of the valve stem 3 is provided with a threaded hole 6, the top of the pilot valve core 4 is provided with a threaded section 7 connected with the pilot valve core 4, the threaded section 7 is screwed tightly in the threaded hole 6, the main valve core 5 is provided with the first sleeve 8 connected with the main valve core 5, the first sleeve 8 is provided with a strip-shape...

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PUM

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Abstract

The invention relates to the technical field of stop valves, and discloses a pilot type self-locking stop valve. The pilot type self-locking stop valve comprises an air cylinder (1), a valve body (2) connected with the air cylinder (1), a valve rod (3) arranged in the air cylinder (1) and the valve body (2), and a pilot valve core (4) connected with the lower end of the valve rod (3), wherein a main valve core (5) arranged on the valve rod (3) in a sleeving mode is arranged at the lower end of the valve rod (3), can move up and down on the valve rod (3) and is arranged above the pilot valve core (4), and the cylinder diameter of the pilot valve core (4) is smaller than the cylinder diameter of the main valve core (5). According to the pilot type self-locking stop valve, the main valve core can be jacked through small air pressure, so that the pressure for opening the valve core is lowered, and high air pressure to be consumed for opening a small valve core is avoided; self-locking is realized through fluid pressure, and additional air pressure is not needed for guaranteeing sealing of the main valve core; and in the up-down moving process of the valve rod, abrasion of a seal ring caused by eccentricity is avoided, and the service life of the seal ring is prolonged.

Description

technical field [0001] The invention relates to the technical field of stop valves, in particular to a pilot-operated self-locking stop valve. Background technique [0002] Globe valve, also called cut-off valve, is the most widely used valve. The reason why it is popular is that the friction between the first sealing surface is small during the opening and closing process, it is relatively durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the stop valve is to rely on the pressure of the valve rod to drive the valve core to seal with the valve body to prevent the flow of medium. The stop valve only allows the medium to flow in one direction, and it is directional when installed. The structural length of the stop valve is longer than that of the gate valve, and at the same time, the fluid resistance is large, and the sealing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/36F16K31/122
CPCF16K1/36F16K31/1221
Inventor 金洪水
Owner 金洪水