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Top-mounted ultra-low temperature ball valve

An ultra-low temperature, top-mounted technology, applied in the direction of valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as difficult to achieve sealing effects, achieve low cost, ensure sealing, and reliable sealing of valve seats

Active Publication Date: 2012-11-28
天津祥嘉流体控制系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-low temperature ball valve is deformed due to the influence of low temperature, so it is difficult to achieve the sealing effect at ultra-low temperature

Method used

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  • Top-mounted ultra-low temperature ball valve
  • Top-mounted ultra-low temperature ball valve
  • Top-mounted ultra-low temperature ball valve

Examples

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Embodiment Construction

[0020] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0021] see Figure 1-4 , a top-entry ultra-low temperature ball valve, including a valve body 1, a valve seat assembly 2, a valve ball 3, a valve cover assembly 4 and a valve stem assembly 5. The valve seat assembly includes a valve seat ring 2-1 and a pressure ring 2-2 fixed on the end of the valve seat ring away from the valve ball. The end of the valve seat ring close to the valve ball is provided with a first installation groove 2-1-1, a sealing ring 2-3 is embedded in the installation groove, and a compression sealing ring is provided on the valve seat ring The inner ring fixes it with flanging 2-1-2. Specifically, during installation, the sealing ring is first installed in the first installation groove, and then the part of the seat r...

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Abstract

The invention relates to a top-mounted ultra-low temperature ball valve, comprising a valve body, a valve seat assembly, a valve ball, a valve cap assembly and a valve rod assembly, wherein the valve seat assembly comprises a valve seat ring and a compression ring; a first mounting groove is formed on the valve seat ring; a seal ring is embedded in the mounting groove; a turnup is formed on the valve seat ring; a first circular bead and a second circular bead are arranged on the valve seat ring; a support bush and a spring disc are arranged between the first circular bead and the valve body; a pressure spring is embedded in the spring disc; the second circular bead, the valve body and the compression ring form an annular seal chamber; a spring energy-accumulation ring is mounted in the annular seal chamber; and a fireproof structure is arranged between the fitted surfaces of the valve seat ring and the valve body. The top-mounted ultra-low temperature ball valve is characterized in that the seal ring is fixed by the turnup structure on the valve seat ring, the valve seat and the valve body are sealed by the annular seal chamber and the spring energy-accumulation ring, and simultaneously the fireproof structure is arranged between the valve seat and the valve seat ring, and therefore, the tightness of the valve seat and the valve ball in fitting under the working condition of ultra-low temperatures is guaranteed; the jointed part of the valve seat ring and the valve body is reliably sealed; and the valve has safe fireproof function.

Description

technical field [0001] The invention relates to a top-mounted ball valve, in particular to a top-mounted ball valve suitable for ultra-low temperature working conditions. Background technique [0002] With the rapid development of petroleum, chemical and gas industries, especially the wide application of liquefied natural gas as a new energy source, the demand for cryogenic valves for LNG is increasing. According to the national energy strategy, my country will actively participate in the development of the world oil and gas market. Since the temperature of LNG under normal pressure is -162°C, and it is flammable and explosive, when designing LNG cryogenic valves, higher requirements are put forward for its sealing performance. [0003] At present, my country's LNG valves mainly rely on imports. Although my country has started the research on LNG valves, it mainly focuses on relatively simple gate valves, globe valves and check valves, and less research on ball valves. Th...

Claims

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Application Information

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IPC IPC(8): F16K5/08F16K5/20
Inventor 金成波钟福来宋世君李华雷潘晓琳
Owner 天津祥嘉流体控制系统有限公司
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