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High-temperature hard seal ball valve

A hard-sealed, high-temperature technology, used in valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as fluid leakage, poor sealing performance, affecting the normal use of ball valves, etc., to ensure normal use and avoid leakage. Effect

Inactive Publication Date: 2015-03-18
龚伶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the working process of the existing hard-sealed ball valve, when the valve seat is displaced under the repeated contact of the ball, the sealing performance between the valve seat and the valve body becomes poor, and the fluid is easy to leak from the gap between the valve seat and the valve body. Thus affecting the normal use of the ball valve

Method used

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  • High-temperature hard seal ball valve

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Effect test

Embodiment

[0012] Such as figure 1 As shown, the hard-sealed high-temperature ball valve includes a valve body 1, a valve seat 2, a ball 3, an upper valve stem 4, a lower shaft 5, and a bellows 6, wherein the valve seat 2 is connected to the valve body 1 by welding. The valve body 1 is composed of a sphere cavity, a medium inlet and a medium outlet. The medium inlet and the medium outlet are respectively located on opposite sides of the valve body 1, and both the medium inlet and the medium outlet are connected to the sphere cavity. The valve seat 2 is set at the position where the sphere cavity is in contact with the medium inlet and the medium outlet, wherein the valve seat 2 constitutes part of the side wall of the sphere cavity, the sphere 3 is set in the sphere cavity and contacts the valve seat 2, and the sphere 3 is provided with a penetrating sphere The channels on both sides, the upper valve stem 4 and the lower rotating shaft 5 pass through the valve body 1 and are connected wi...

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Abstract

The invention discloses a high-temperature hard seal ball valve. The high-temperature hard seal ball valve comprises a valve body, a ball body, an upper valve rod, a corrugated pipe and a valve seat. The valve seat is connected with the valve body which is provided with a ball cavity, a medium inlet and a medium outlet, the medium inlet and the medium outlet are communicated with the ball cavity, the valve seat serves as the side wall of the ball cavity, the ball body is arranged in the ball cavity and contacts with the valve seat, the upper valve rod penetrates through the valve body to be connected with the ball body, two ends of the corrugated pipe are connected with the valve body and the valve seat respectively, and the corrugated pipe, the valve body and the valve seat form a closed cavity. By adoption of the structure, the high-temperature hard seal ball valve is integrally simple in structure and convenient to implement; by the aid of the corrugated pipe, when a gap communicated with the ball cavity is formed between the valve body and the valve seat, influences on use normality of the high-temperature hard seal ball valve due to leakage of fluid through the gap between the valve body and the valve seat can be avoided.

Description

technical field [0001] The invention relates to a ball valve, in particular to a hard-sealed high-temperature ball valve. Background technique [0002] Because the ball valve has the advantages of small fluid resistance, convenient operation, and quick opening and closing, it has been widely used in petrochemical, long-distance pipelines, and urban heating industries. Ball valves can be divided into soft-sealed ball valves and hard-sealed ball valves according to their seat materials. Among them, the seat of the soft-sealed ball valve is made of polytetrafluoroethylene or filled with polytetrafluoroethylene, which is generally suitable for fluids with a temperature not exceeding 200 ° C. ;The seat of the hard-sealed ball valve is made of metal, which is generally suitable for fluids with a temperature higher than 250°C. In the working process of the existing hard-sealed ball valve, when the valve seat is displaced under the repeated contact of the ball, the sealing performa...

Claims

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Application Information

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IPC IPC(8): F16K5/08F16K5/20
CPCF16K5/0689F16K5/201
Inventor 龚伶
Owner 龚伶
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