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A sealing structure of a super-large caliber full-welded ball valve

A technology of all-welded ball valve and sealing structure, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as poor sealing and medium leakage, achieve easy opening and closing, prevent leakage, and improve sealing. Effect

Active Publication Date: 2018-02-02
三角洲篷房智能制造(江苏)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to overcome the problem that the sealing structure of the super-large-diameter fully-welded ball valve in the prior art has poor sealing performance and is prone to medium leakage, the present invention provides a super-large-diameter fully-welded ball valve sealing structure, which optimizes the sealing The structure reduces the leakage, the manufacture is simple, the installation is convenient, and it is economical

Method used

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  • A sealing structure of a super-large caliber full-welded ball valve
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  • A sealing structure of a super-large caliber full-welded ball valve

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Embodiment Construction

[0028] The present invention will be described in detail in conjunction with accompanying drawing now. This figure is a simplified schematic diagram only illustrating the basic structure of the present invention in a schematic manner, so it only shows the components relevant to the present invention.

[0029] like figure 1 As shown, a super-large-diameter full-welded ball valve includes a valve body 1, a sphere 2 and an extension tube 3, and the upper and lower ends of the sphere 2 are rotatably connected to the valve body 1 through an upper valve stem 4 and a lower valve stem 5, respectively. The extension pipe 3 is welded to the valve body 1 through the head 6, and a sealing structure is also provided between the sphere 2 and the extension pipe 3, and the sealing structure is arranged symmetrically up and down, and has the same structure.

[0030] like figure 2 and image 3 As shown, the sealing structure of a super-large diameter fully welded ball valve of the present i...

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Abstract

The invention provides an ultra-large diameter all-welded ball valve sealing structure. The ultra-large diameter all-welded ball valve sealing structure comprises a ball, a ball pad, a ball pad base and a connecting pipe which are sequentially connected from interior to exterior. The face, attached to the ball, of the ball pad is provided with a first slope and a second slope which are tangent to the ball, and the position, tangent to the ball, of the first slope is located above the position, tangent to the ball, of the second slope. Multi-stage sealing is adopted in the sealing structure, the ball pad is pressed on the ball, two inclined edges of the ball pad are tangent to the ball to form double-stage sealing, the fluid leakage amount is reduced, and the sealing performance is improved. Sealing rings are arranged on the connecting face of the ball and the ball pad, the connecting face between the ball pad and the ball pad base and the connecting face between the ball pad base and the connecting pipe, and fluid leakage is avoided. According to the ball valve sealing structure, few components are arranged, and the structure is simple.

Description

technical field [0001] The invention relates to the technical field of ball valve sealing structure, in particular to a super large-diameter full-welded ball valve sealing structure. Background technique [0002] Valve, as a pressure pipeline component, is a device that controls the pressure, flow and temperature of the conveying medium by changing the section of the pipeline and the flow direction of the medium. The ball valve is evolved from the plug valve. It is a rotary motion valve, which uses the ball to rotate 90° around the axis of the valve stem to achieve the purpose of opening and closing. The structure of the ball valve is generally composed of a ball, a ball cushion, a ball cushion seat, a spring, a connecting pipe, an extension pipe, a valve stem, a valve stem driving device, and auxiliary sealing rings between parts. The ball pad makes direct contact with the ball, creating the primary seal. The ball valve not only has a simple structure and good sealing per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06F16K5/08
CPCF16K5/0668F16K5/0689F16K5/08
Inventor 陆怡姚润盐陈政云
Owner 三角洲篷房智能制造(江苏)有限公司
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