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Ultra-low temperature top-mounted type ball valve

An ultra-low temperature, top-loading technology, applied to valve details, valve devices, cocks including cut-off devices, etc., can solve problems such as unclear pressure relief direction of cryogenic ball valves, valves that do not meet the requirements of working conditions, etc.

Active Publication Date: 2012-10-24
SANBORA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, ordinary cryogenic ball valves are not clear in the pressure relief direction, that is, it is impossible to determine whether the pressure in the middle chamber is released from the upstream or the downstream. Therefore, strictly speaking, this type of valve does not meet the requirements of the working conditions.

Method used

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  • Ultra-low temperature top-mounted type ball valve
  • Ultra-low temperature top-mounted type ball valve
  • Ultra-low temperature top-mounted type ball valve

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0022] see Figure 1 to Figure 4 As shown, a top-entry ball valve for ultra-low temperature of the present invention includes a valve body 1, an upper valve cover 7, a ball 2, a valve stem 13, a valve seat 16, a valve seat retainer 5, a disc spring 20, a pre-tightening nut 3, a Rotary seat ring 19, drip plate 8 and spring energy storage sealing ring 6.

[0023] The valve seat 16 of the present invention is arranged in the groove of the valve seat holder 5, the spring energy storage sealing ring 6 is placed on one side of the valve seat holder 5, and the anti-rotation seat ring 19 is equipped with a positioning pin 18, which is connected with the valve The pin holes on the seat fixer 5 are matched, and the pretightening nut 3 circumference is pr...

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Abstract

The invention discloses an ultra-low temperature top-mounted type ball valve, which comprises a valve body, an upper valve cover, a valve rod, a valve base, a valve base fixer, a disc-shaped spring, a pre-fastening nut, an anti-rotation base ring, a water drop plate and a spring energy storage sealing ring, wherein the valve base is arranged inside a valve base fixer groove; the spring energy storage sealing ring is installed at one side of the valve base fixer; a positioning pin is installed on the anti-rotation base ring; the positioning pin is matched with a pin hole on the valve base fixer; a plurality of installing process holes are formed in the circumference of the pre-fastening nut; the pre-fastening nut and the valve base fixer are connected by threads; an reversed pressure ring is arranged on the other side of the valve base fixer; and the diameter of the reversed pressure ring is larger than the diameter of the spring energy storage sealing ring. With the adoption of the ball valve, the requirements on pressure releasing under any working condition can be met.

Description

technical field [0001] The invention relates to a top entry ball valve, in particular to a top entry ball valve suitable for LNG projects and other low temperature working conditions. Background technique [0002] At present, ordinary cryogenic ball valves adopt a side-mounted structure, and most of the valves used in ultra-low temperature conditions are connected to the pipeline by welding. Once the valve leaks, the valve can only be repaired by cutting it off from the pipeline. It not only increases the maintenance cost, but also brings considerable losses to customers and enterprises. [0003] There is no reverse pressure ring on the seat holder of ordinary cryogenic ball valves. When the pressure in the middle cavity rises abnormally, the spring energy storage sealing ring will be damaged, resulting in valve leakage. [0004] In addition, ordinary cryogenic ball valves are not clear in the direction of pressure relief, that is, it is impossible to determine whether the ...

Claims

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Application Information

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IPC IPC(8): F16K5/20F16K41/02
Inventor 卓桂朝罗起飞贾琦月刘田园卓华琛蔡中鹏朱佳俊
Owner SANBORA VALVE
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