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Main valve element for reversing valve

A main spool and reversing valve technology, which is applied in the direction of multi-way valves, valve devices, mechanical equipment, etc., can solve the problems of deformation easily affected by external force, enhanced liquid erosion ability, complex working environment, etc. Strong toughness, improved fluidity, and high surface hardness

Inactive Publication Date: 2017-01-04
NINGBO LONG WALL FLUID KINETIC SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the reversing valve is used as a reversing tool for crude oil, fuel oil and other highly corrosive liquids, its working environment is complex, and it is extremely vulnerable to the erosion of various corrosive elements in the environment and oil products, and it is extremely difficult in production applications. It is easy to be deformed due to the impact of external force. This situation is especially dangerous when the reversing valve is used in the pressurized delivery of liquid. At this time, the erosion ability of the liquid is significantly enhanced, and a slight damage to the device will infinitely magnify the damage.

Method used

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  • Main valve element for reversing valve

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, if figure 1 , 2 As shown, the main valve core in a reversing valve includes an upper valve sleeve 1, a lower valve sleeve 2, and a valve core 3. The lower valve sleeve 2 is inserted into the upper valve sleeve 1 and connected with the upper valve sleeve 1. The sleeve is provided with a piston 4, the valve core 3 is located in the lower valve sleeve 2 and extends into the piston 4, the upper valve sleeve 1 has an opening and an end cap 5 is provided at the opening; the lower valve sleeve 2 and the upper valve sleeve 1 Sealing rings 6 made of composite materials are provided on the outer walls.

[0029] The sealing ring composite material includes the following components by weight: nitrile rubber: 100 parts, white carbon black: 15 parts, silicon powder: 18 parts, modified nano titanium dioxide: 4 parts, surface modifier: 5 parts, Zinc oxide: 5 parts, anti-aging agent: 25 parts, vulcanizing agent: 5 parts.

[0030] The upper valve sleeve, lower valve s...

Embodiment 2

[0036] The difference between this embodiment and embodiment 1 is only:

[0037] In this embodiment, the sealing ring composite material includes the following components in parts by weight: nitrile rubber: 100 parts, white carbon black: 13 parts, silicon powder: 25 parts, modified nano-titanium dioxide: 2 parts, surface modifier : 4 parts, zinc oxide: 6 parts, anti-aging agent: 20 parts, vulcanizing agent: 4 parts.

[0038] The alloy steel materials used for upper valve sleeve, lower valve sleeve and valve core are: C: 0.14%, Cr: 1.6%, Si: 0.32%, Mn: 0.9%, Al: 0.048%, N: 0.048%, Mo: 0.27% , Cu: 0.038%, S: 0.008%, V: 0.14%, RE: 0.09%, P≤0.015%, the balance is Fe and unavoidable impurities, of which RE is based on the total mass of RE: Ce49%, La31 .5%, Pr3.5%, and the balance is Nd. The surface layer of the main valve core main body is doped with additives, and the content of the additive silicon dioxide in the main body is 0.4wt%.

[0039] The upper valve sleeve, lower valv...

Embodiment 3

[0044] The difference between this embodiment and embodiment 1 is only:

[0045] In this embodiment, the sealing ring composite material includes the following components in parts by weight: nitrile rubber: 100 parts, white carbon black: 15 parts, silicon powder: 20 parts, modified nano titanium dioxide: 3 parts, surface modifier : 6 parts, zinc oxide: 4 parts, anti-aging agent: 15 parts, vulcanizing agent: 6 parts.

[0046] The alloy steel material of the main body of the main valve core is: C: 0.13%, Cr: 1.8%, Si: 0.25%, Mn: 1.1%, Al: 0.058%, N: 0.032%, Mo: 0.34%, Cu: 0.026 %, S: 0.020%, V: 0.09%, RE: 0.14%, P ≤ 0.015%, the balance is Fe and unavoidable impurities, of which RE is based on the total mass of RE: Ce452%, La30.5%, Pr4.5%, the balance is Nd.

[0047] The upper valve sleeve, lower valve sleeve and valve core of the main valve core are processed by the following process:

[0048] Pre-treatment: According to the composition elements and mass percentages of the ab...

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Abstract

The invention relates to a main valve element for a reversing valve. The main valve element comprises a lower valve sleeve, a valve element and an upper valve sleeve internally provided with a piston. The lower valve sleeve is inserted into the upper valve sleeve to be connected with the upper valve sleeve. The valve element is located in the lower valve sleeve and stretches into the piston. The upper valve sleeve is provided with an opening which is covered with an end cover. The upper valve sleeve, the lower valve sleeve and the valve element are all made of alloy steel. The alloy steel comprises 0.10-0.15% of C, 1.5-2.0% of Cr, 0.22-0.35% of Si, 0.8-1.2% of Mn, 0.045-0.06% of Al, 0.03-0.05% of N, 0.25-0.35% of Mo, 0.025-0.04% of Cu, 0.005-0.022% of S, 0.08-0.15% of V, 0.08-0.15% of RE, no more than 0.015% of P and the balance Fe. The main valve element is high in toughness and good in anti-tempering stability, cold-hot-fatigue resistance and high-temperature abrasion resistance.

Description

technical field [0001] The invention relates to a main valve core for a reversing valve. Background technique [0002] Reversing valve, also known as Chris valve, is a kind of valve with multi-directional adjustable channels, which can change the flow direction of fluid in a timely manner. It can be divided into manual reversing valve, electromagnetic reversing valve, electro-hydraulic reversing valve, etc. It is mainly composed of valve body, sealing assembly, cam, valve stem, handle and valve cover and other components. The valve is driven by the handle, and the handle drives the valve stem and the cam to rotate. The cam has the function of positioning, driving and locking the opening and closing of the sealing assembly. When the handle is rotated counterclockwise, the two sets of sealing assemblies respectively close the two passages at the lower end under the action of the cam, and the two passages at the upper end communicate with the inlet of the pipeline device respe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/02F15B13/02C22C38/18C22C38/16C22C38/12C22C38/06C22C38/04C22C38/02
CPCF16K11/02C22C38/001C22C38/005C22C38/02C22C38/04C22C38/06C22C38/12C22C38/16C22C38/18F15B13/02
Inventor 应永华裘忠红梁益来
Owner NINGBO LONG WALL FLUID KINETIC SCI TECH
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