Cast stone ball valve with combined seal

A combination of sealing and casting stone technology, which is applied in the direction of valve devices, cocks including cutting devices, engine components, etc., can solve the problems of poor sealing performance, loss of sealing function, short service life, etc., and achieve reduced wear and erosion, and sealing performance Stable, long product life effect

Inactive Publication Date: 2011-12-07
BOTELI VALVE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is that the particles and impurities in the medium are easy to enter the spring cavity. After long-term use, the particles and impurities will block the spring cavity and make the spring lose its elasticity.

Method used

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  • Cast stone ball valve with combined seal
  • Cast stone ball valve with combined seal
  • Cast stone ball valve with combined seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] like figure 1 The shown cast stone ball valve with combined seal includes a valve body 1, a floating valve seat 2, a valve cover 5, a valve stem 4, a ball body 3, a driving mechanism, seals and mounting parts, and the upper end of the ball body 3 is fixedly connected with the valve stem 4. , the lower end of the support rod 18 is positioned in the valve body 1 to form a fixed ball structure. The sealing surface of the floating valve seat 2 is a combined sealing surface composed of a hard sealing surface 6 and a soft sealing surface 7. The hard sealing surface 6 is made of wear-resistant material surfacing on the floating valve seat 2, and has a sealing surface that cooperates with the ball 3. The curved surface can scrape off the dry ash and solid particles on the surface of the sphere 3 during the valve opening process, so as to clean the sealing surface of the sphere 3 . The soft sealing surface 7 is composed of a fluororubber sealing ring installed in the annular gr...

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PUM

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Abstract

The invention relates to a cast stone ball valve with combined sealing, which includes a valve body, a floating valve seat, a valve cover, a valve stem, and a ball. The sealing surface of the floating valve seat is a combined sealing surface composed of a hard sealing surface and a soft sealing surface. The soft sealing surface is a pressure-filled U-shaped ring, and its two sides are positioned in the annular groove of the floating valve seat with two side rings. The U-shaped pressure chamber communicates with the piston hydraulic chamber, and the piston air pressure chamber passes through The two-position solenoid valve and the regulating valve are connected to the air pressure source. The working coil of the two-position solenoid valve is connected to the power supply through the series branch of the valve closing position switch and the valve opening position switch. The closed and fully open positions are disconnected, and a return spring is installed between the piston and the piston cylinder on the side of the piston hydraulic chamber. The contact area between the medium and the soft sealing surface is small, which has the advantages of stable and reliable sealing performance and long service life. It is suitable for opening and closing devices of slurry and dry ash pipeline systems in power plants, mines, metallurgy, and chemical industries.

Description

technical field [0001] The invention relates to the field of valves, in particular to a cast stone ball valve with a combined sealing structure. The invention is suitable for opening and closing devices of slurry and dry ash pipeline systems in power plants, mining, metallurgy, chemical industry and other industries. Background technique [0002] Ball valves are widely used in opening and closing devices on medium conveying pipelines in various industries due to their simple structure, convenient opening and closing, and small flow resistance. The cast stone ball valve is more suitable for abrasive medium conditions such as dry ash with liquid-solid and gas-solid two-phase media. Its sealing structure has two structural forms: soft sealing and hard sealing. The seat sealing surface of the cast stone ball valve with soft sealing structure is usually made of PTFE material. When the valve is opened, due to the impact of particles on the seat sealing surface, the PTFE sealing s...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/20
Inventor 顾玉海尚玉来缑志奇葛志克
Owner BOTELI VALVE GROUP
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