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Movable valves

A technology of movable valves and valve stems, which is applied in the direction of lifting valves, valve details, valve devices, etc., can solve the problems of poor sealing performance, short service life of valves, water leakage, etc., and achieve good sealing performance, long service life and wide application range Effect

Inactive Publication Date: 2007-08-15
王培望
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this valve is in use, because the valve stem needs to be adjusted frequently, it will affect the sealing performance of the sealing ring.
Long-term use will damage the sealing ring and cause the valve to leak air or water
Therefore, such valves have short service life and poor sealing performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: This movable valve includes a housing 1 with a lumen 2 inside and a valve stem. The valve stem is composed of a front valve stem 20 and a rear valve stem 10 connected together by a pin shaft 19. The rear valve stem 10 is A limiting hole 18 is opened, and the pin shaft 19 is located in the limiting hole 18 . Therefore, the front valve stem 20 can move back and forth within the range of the limiting hole 18 , so that the front valve stem 20 can be smoothly threaded with the inner wall of the lumen 2 . The front valve stem 20 is threadedly connected to the inner wall of the pipe cavity 2, and there is a seal between the rear valve stem 10 and the housing 1, which includes a dynamic sealing ring 16, a static sealing ring 17, and a dynamic sealing ring arranged on the rear valve stem 10. 16 and static sealing ring 17 are all made of ceramic material. The inner wall of the lumen 2 is provided with a step 5 that matches the static sealing ring 17; the rear valve...

Embodiment 2

[0016] Embodiment 2: Referring to accompanying drawing 2, the difference from Embodiment 1 is that the front end of the front valve stem 20 is tapered.

[0017] The invention has a wide application range and can be used in water, natural gas and gas pipelines, as well as various oil, chemical, hot and cold water pipelines.

[0018] Fig. 3 is a structural schematic diagram of a movable valve used in a welding torch. The welding torch shares two movable valves A and B, the movable valve A is used to control the flow of oxygen, and the movable valve B is used to control the flow of acetylene. The oxygen tube 8 and the acetylene tube 7 are connected to the handle 6, and the handle 6 is fixedly connected to the housing 1. The housing 1 has channels communicating with the oxygen tube 8 and the acetylene tube 7 respectively, and each channel is provided with a movable valve , the active valve inlet 3 is connected to the channel. Oxygen and acetylene are mixed after being controlled...

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Abstract

A valve consists of a body with a cylindrical chamber, a rod which includes a front part and a rear part connected with a pin. The front part is connected with the inner thread of the cylindrical chamber. A sealer is located between the body and the rear part. A shrunk opening is formed at the rear end of the cylindrical chamber and the top of the front part is matched with the said shrunk opening. The both parts can be actuated separately, so that the front part moves forwards while the rear part can be sealed tightly with ceramic sealing ring. It has a long service life and can be used widely.

Description

technical field [0001] The invention relates to a movable valve, in particular to a movable valve used for cutting torches and welding torches. Background technique [0002] Its valve stem of known valve is generally structural valve stem, seals with rubber O-ring between valve stem and housing. When this kind of valve is in use, because the valve stem needs to be adjusted frequently, it will affect the sealing performance of the sealing ring. Long-term use will damage the sealing ring and cause the valve to leak air or water. Therefore, such valves have short service life and poor sealing performance. However, the valves used in cutting torches and welding torches require high sealing performance, so it is necessary to provide a valve with better sealing performance. Contents of the invention [0003] The present invention aims to solve the above-mentioned defects of the prior art, and provides a movable valve in which the valve stem is divided into two parts. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/02F16K41/02
Inventor 王培望
Owner 王培望
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