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Floating ball valve dedicated to high-pressure steam

A floating ball valve, high-pressure steam technology, applied in valve devices, engine components, cocks including cut-off devices, etc., can solve the problems of short life, long production cycle, poor performance, etc., achieve high pressure levels, achieve localization, resistance Excellent abrasive effect

Active Publication Date: 2016-03-02
SUZHOU SIP STARD VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of domestic steam valves started relatively late compared with foreign advanced countries. At present, the production of medium and low pressure steam valves is still the main product, with low parameters, poor performance, short life, and poor test methods. Most of them cannot meet the needs of the domestic market. High-parameter products are basically imported, but imported valves have disadvantages such as expensive prices, long production cycles, and high operating costs.
In the traditional steam valve, the outlet end is sealed to weld the valve seat and the valve body together, but it is easy to cause the valve seat to be stuck due to the deformation of the valve seat due to welding stress during welding, and it is not easy to disassemble

Method used

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  • Floating ball valve dedicated to high-pressure steam

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Effect test

Embodiment 1

[0018] as attached figure 1 As shown, the special floating ball valve for high-pressure steam described in this embodiment includes a valve body 1, a ball body 2 and a valve stem 5, one end of the valve stem 5 is connected to the ball body 2, and the other end extends out of the valve body. The medium inlet side of the valve body is provided with a first metal valve body 7, the medium outlet side of the valve body is provided with a second metal valve seat 3, and the ball 2 is arranged on the first metal valve body. Between the seat 7 and the second metal valve seat 3, and the first metal valve seat 7 and the second metal valve seat 3 are attached to the ball 2 to form a metal sealing pair. The valve stem 5 and the valve body 1 are filled with valve stem packing, and the outer side of the first metal valve seat 7 is provided with a valve seat pressure ring 8, and the valve seat pressure ring 8 is screwed into the valve body 1, and is passed through the disc spring. 4 Press th...

Embodiment 2

[0021] In this embodiment, in order to endow the sphere with durability, wear resistance and corrosion resistance under high pressure and high temperature steam conditions, the valve seats (the first valve seat and the second valve seat) and the sphere are made of hardened steel become. The chemical composition of the hardened steel is as follows: 0.12-0.20wt% of C, 1.50-1.80wt% of Cu, 1.20-1.50wt% of Ni, 1.80-2.10wt% of Cr, 0.15-0.20wt% of Al, 0.15 ~0.50wt% Mo, 0.005~0.015wt% N, 0.002~0.005wt% B, Si≤0.5wt%, Mn≤0.5wt%, P≤0.030wt%, S≤0.030wt%, the balance is Fe and unavoidable impurities. Preferably, the content of C in the hardened steel is 0.12-0.15wt%, the content of Cu is 1.60-1.80wt%, the content of Ni is 1.25-1.35wt%, the content of Cr is 1.80-2.00wt%, and the content of Al The content of Mo is 0.18-0.20wt%, the content of Mo is 0.20-0.30wt%, the content of N is 0.008-0.015wt%, and the content of B is 0.002-0.003wt%. The hardened steel is casted, then treated with wate...

Embodiment 3

[0027] In this embodiment, a sealing coating is formed on the surface of the first metal valve seat facing the sphere through a laser cladding process, and the thickness of the sealing coating is 0.5mm˜5.0mm. The seal coat needs to combine good heat resistance, low friction and abrasion resistance. The raw material composition of the sealing coating is: 8.0-10.0wt% zirconium phosphate, 5.0-6.0wt% zirconium dioxide, 10.0-12.2wt% graphite, 10.0-12.0wt% chromium, 5.0-5.5wt% aluminum, 0.2-0.8wt% boron, and the rest nickel. The preparation method of the sealing coating is as follows: (1) prepare raw materials according to the above composition, and perform ball milling in a ball mill so that the particle size of the powder is 10 μm; (2) adopt a power density of 10 μm 4 W / cm 2 The laser beam is irradiated to form a molten pool, which is fed into the prepared raw material powder synchronously, and the powder-carrying gas is N 2The laser is a carbon dioxide gas laser, the scanning ...

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Abstract

The invention relates to a floating ball valve dedicated to high-pressure steam and belongs to the technical field of valves. The floating ball valve dedicated to high-pressure steam comprises a valve body, a ball and a valve rod. A first metal valve seat is arranged on one side of a medium inlet end of the valve body, and a second metal valve seat is arranged on one side of the outlet end. The first metal valve seat and the second metal valve seat are attached to the ball to form a metal seal pair. A valve seat compression ring is arranged outside the first metal valve seat, and a disc spring is arranged between the valve seat compression ring and the first metal valve seat. Seal pre-tightening pressure can be set by adjusting compression force of the disc spring. The floating ball valve dedicated to high-pressure steam is good in seal property, low in leakage rate, outstanding in abrasion resistance, convenient to assemble and disassemble, and applicable to working conditions with high working pressure and bad working conditions; besides, for the current situation the current situation that the leakage rate of steam valves in China is high and medium-and-low-pressure steam valves are dominated in China, the floating ball valve can well make up the gap.

Description

technical field [0001] The invention relates to the technical field of valves, and more specifically, the invention relates to a special floating ball valve for high-pressure steam. Background technique [0002] Since the high-temperature water vapor is easy to generate hydrogen and mix with the oxygen in the plant to cause an explosion, the floating ball valve for high-pressure steam is required to have higher wear resistance and sealing performance. The development of domestic steam valves started relatively late compared with foreign advanced countries. At present, the production of medium and low pressure steam valves is still the main product, with low parameters, poor performance, short life, and poor test methods. Most of them cannot meet the needs of the domestic market. High-parameter products are basically imported, but imported valves have disadvantages such as expensive prices, long production cycles, and high operating costs. In the traditional steam valve, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/08
CPCF16K5/0668F16K5/08
Inventor 王顺军
Owner SUZHOU SIP STARD VALVE
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