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A kind of ultra-low temperature ball valve

An ultra-low temperature, ball valve technology, used in valve devices, cocks including cut-off devices, engine components, etc., to solve problems such as leakage and reduced sealing effect

Active Publication Date: 2018-01-16
JIANGSU SHENGTAI VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the elasticity of the disc spring and sealing ring becomes weak after a long period of use, the sealing effect between the front metal sealing ring and the spherical surface will be reduced, and even leakage will occur.

Method used

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  • A kind of ultra-low temperature ball valve
  • A kind of ultra-low temperature ball valve
  • A kind of ultra-low temperature ball valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]As shown in the figure, an ultra-low temperature ball valve includes a valve body 1, a valve cover 2, and a valve stem 3. The valve body 1 has an inlet portion 4 and a valve chamber 5. The inlet portion 4 is provided with a first through hole 4.1, and the first through hole 4.1 communicates with the valve chamber 5, and the valve chamber 5 has an upper neck portion 5.1, a lower neck portion 5.2 and a press fitting portion 5.3. The upper neck 5.1 is provided with a valve stem hole 5.4 and a sphere upper support platform 5.6, and the lower neck 5.2 has a blind hole 5.5 coaxial with the valve stem hole 5.4 and a sphere lower support platform 5.7. The valve stem 3 is arranged in the upper neck 5.1 and the lower end is fixedly connected to the ball 6, and the upper end of the rotating shaft 5.8 is fixedly connected to the ball 6, so that the ball 6 can be rotatably positioned in the valve chamber 5 with a gap δ from the inner surface of the valve. The sphere 6 is rotatably su...

Embodiment 2

[0060] The valve body is a fully welded spherical valve body structure, and the sealing structure adopts a sealing structure in which a spherical sealing ring 16 cooperates with a dynamic pressure sealing device 22 for both upstream and downstream. details as follows:

[0061] As shown in the figure, the valve cover 2 is integrally welded to the valve body 1 so that the valve chamber 5 of the valve body 1 forms a closed spherical valve chamber, so that the second through hole 2.1 is on the same axis as the first through hole 4.1, At the same time, the spherical inner wall of the valve chamber 5 forms a gap δ with the surface of the ball 6 .

[0062] The inlet 4 of the valve body 1 is provided with a dynamic pressure sealing device 22, and the dynamic pressure sleeve 18 is optionally provided with a ball sealing device 21 corresponding to the inlet position of the valve chamber, and the dynamic pressure sealing device 22 includes a dynamic pressure sleeve 18. Spherical thin-wa...

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PUM

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Abstract

An ultra-low temperature ball valve, comprising a valve body, a valve cover, a valve stem and a ball, the valve body has an inlet portion and a valve chamber, the inlet portion has a first through hole; the valve stem is rotatably arranged in the valve chamber and the lower end The ball is fixedly connected to control the flow through the valve chamber by rotating the ball; the distance between the ball and the inner wall of the valve is a gap δ; the valve cover includes a second through hole, and the valve cover is press-fitted on the valve body so that the second The through hole is coaxial with the first through hole and connected in series with the valve chamber to form a valve body channel of the ball valve; it also includes a ball sealing device, and the ball sealing device is arranged in the sealing ring positioning ring groove of the valve cover; It includes a dynamic pressure sealing device (), and the dynamic pressure sealing device is arranged at the inlet of the valve chamber. The ultra-low temperature ball valve not only utilizes the inverted cone-shaped spherical sealing ring structure, but also utilizes the auxiliary function of the dynamic pressure sealing device. The synergistic effect of the two makes the sealing level of the ball valve greatly improved.

Description

technical field [0001] The invention relates to the technical field of ball valves, in particular to an ultra-low temperature ball valve. Background technique [0002] There are specific storage conditions for the storage of chemical raw material liquid gas. For example, the storage condition of liquid oxygen is low temperature and high pressure compression. When the pressure is reduced and the temperature rises, the liquid oxygen is converted into gas and released. Therefore, low temperature pressure vessels are used for the storage of liquid raw material gas. Cryogenic pressure vessels are used to store and transport liquid gases such as liquefied ethylene, liquefied natural gas, liquid nitrogen, liquid oxygen, and liquid hydrogen. Pressure vessels must use valves. Cryogenic ball valves have the characteristics of good sealing, high reliability, small fluid resistance, long life, and fast switching, and are widely used in pressure vessels. [0003] The tightness is the k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0605F16K5/201F16K5/205
Inventor 严涛丁超王金鹤姜风春严珊珊李伟汪中厚
Owner JIANGSU SHENGTAI VALVE CO LTD