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Metal hard sealing ball valve base

A hard seal, valve seat technology, used in valve devices, cocks including cut-off devices, engine components, etc.

Inactive Publication Date: 2013-01-02
张业宝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even after precision grinding, the height of the peaks on the metal surface will still exceed 0.1 μm, which is 30 times larger than the diameter of water molecules
Therefore, the metal-to-metal seal between the ball and the valve seat cannot meet the requirements of high-level sealing.

Method used

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  • Metal hard sealing ball valve base

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Experimental program
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Effect test

Embodiment Construction

[0022] refer to figure 1 Shown:

[0023] A metal hard-sealed ball valve seat, the valve seat 3 is arranged between the ball 2 and the valve body 1, and has a ring structure, one side is the valve body contact surface 3d, and the other side is the ball contact surface 3c, the valve body contacts The surface 3d is provided with a wave spring 4, a right pressure ring 5a, a left pressure ring 5b, a right sealing gasket 6a, and a left sealing gasket 6b. The sphere contact surface 3c is a conical surface, and the sphere contact surface 3c is provided with a sealing surface 3a. The section of the sealing surface 3a is an arc, the sealing surface 3a is in contact with the sphere sealing surface 2a provided on the sphere 2, and the sealing surface 3a corresponds to the sphere contact surface 1b.

[0024] The valve seat wave spring 4 is a two-way wave spring, which is arranged between the right pressure ring 5a and the left pressure ring 5b.

[0025] One end of the right pressure ri...

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PUM

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Abstract

The invention discloses a metal hard sealing ball valve base. The valve base is arranged between a ball body and a valve body and is of a ring-shaped structure, one side of the valve base is provided with a valve body contact surface, the other side of the valve base is provided with a ball body contact surface, and the valve body contact surface is provided with a wave spring, a right compression ring, a left compression ring, a right sealing gasket and a left sealing gasket; the ball valve base is characterized in that the ball body contact surface is a circular conical surface, and the ball body contact surface is provided with a sealing surface; the section of the sealing surface is a circular arc, the sealing surface is contacted with the ball body sealing surface on the ball body and is corresponding to the ball body contact surface; and the valve base wave spring is a two-way wave spring and is arranged between the right compression ring and the left compression ring. The metal hard sealing ball valve base provided by the invention has the advantages that the structure is compact and reasonable, and compared with the existing valve bases, the torque is small, the start-stop operation is flexible, the attrition under the using working condition is small, the sealing property is high, the high temperature resistance property is realized, and the service life is long.

Description

technical field [0001] The invention relates to a metal hard sealing ball valve seat. Background technique [0002] Existing metal hard-sealed ball valves: 1. Metal-to-metal seals are used between the ball and the valve seat, and rubber seals are used between the valve seat and the valve body. The rubber usually cannot withstand a temperature exceeding 300°C, which cannot meet the requirements of various industries under high-temperature conditions. Sealing requirements. 2. The metal-to-metal seal is used between the ball and the valve seat, and the graphite-filled seal is used between the valve seat and the valve body. When the sealing surface gap is smaller than the molecular diameter of the medium, the medium can be guaranteed not to leak. The gap value to prevent medium leakage must be as small as 0.003μm. However, the height of the peaks on a metal surface that has been precisely ground still exceeds 0.1 μm, which is 30 times larger than the diameter of a water molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/20F16K5/08
Inventor 张业宝
Owner 张业宝