Screwing type hard seal ball valve

A hard-sealed, ball valve technology, applied in valve details, valve devices, cocks including cut-off devices, etc., can solve the problem of not being able to ensure the seal on a regular basis, and achieve the effect of easy maintenance and replacement, easy installation and construction, and easy positioning.

Inactive Publication Date: 2008-09-24
SHANGHAI VALVE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ball valves using this kind of soft seal generally work under normal temperature conditions. Even if polytetrafluoroethylene, which is known as the king of plastics, cannot ensure the sealing requirements for a long time when the medium temperature is as high as 234°C

Method used

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  • Screwing type hard seal ball valve
  • Screwing type hard seal ball valve
  • Screwing type hard seal ball valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Please refer to Fig. 1, the present invention is a screw-on hard-sealed ball valve, which includes a valve seat 4 and a valve core, and the valve core is connected to the upper surface of the valve cover 1 with its upper fixed journal 10 and lower fixed shaft 6 respectively. The bearing seat 9 cooperates with the lower bearing seat 7 of the valve body 5 to be supported in the valve cavity B formed by the valve cover 1 and the valve body 5, and rotates around the vertical axis Z-Z of the ball valve. The spool is a spheroid composed of a metal ball body 2 and two metal spherical caps 3 offset on both sides of the ball body 2, the radius SR1 of the ball body 2 (see Figure 2) is smaller than the radius of the metal spherical cap 3 SR2, the radial through hole 8 is located on the ball main body 2. When the ball valve is fully open, the axis of the radial through hole 8 is coaxial with the horizontal longitudinal axis X-X of the valve body (see Figure 4); the two metal spheric...

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PUM

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Abstract

The invention relates to a ball valve. A tightly screwed ball valve with a hard seal includes valve seat and a valve core, which is characterized in that the valve core is a spheroid composed of a main ball body and two metal spherical caps which serve as the sealing face. The radius of the main ball body is less than the radius of the metal spherical caps. The sphere centers of the two metal spherical caps are respectively biased at the two sides of the longitudinal axial line X-X of the valve body symmetrically and are located on the horizontal axial line Y-Y of the valve body. The valve seat is metal and the end plane thereof provided with the sealing face and the longitudinal axial line X-X of the valve body form an inclination angle alpha. The invention solves the technical problem that the metal valve seat and the valve core realize zerofriction seal between the sealing faces.

Description

Technical field: [0001] The invention belongs to valves, in particular to a screw-type hard-sealed ball valve with convenient and fast opening and closing and frictionless sealing. Background technique: [0002] Ball valves are widely used in various fields due to their convenient opening and closing. There are various ball valves, the spool of which is a spherical body with a horizontal radial through hole, and when the spherical spool is rotated so that the horizontal radial through hole on it is opposite to the channel of the valve seat on the valve body, the valve is opened; When the valve core makes the horizontal radial through hole and the passage of the valve seat form 90°, the spherical surface on the valve core and the sealing surface on the valve seat fit together to form a seal, thereby cutting off the passage of the valve and closing the valve. In order to make the sealing surface on the valve seat fit closely with the metal spherical surface on the valve core ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/08F16K25/00
Inventor 刘其斌王建克高连元
Owner SHANGHAI VALVE FACTORY
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