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Cathodic protection corrosion-proof valve

A cathodic protection and anti-corrosion technology, which is applied in the direction of lifting valves, valve devices, engine components, etc., can solve the problems of narrow applicability, poor anti-corrosion effect of valves, and poor versatility, so as to prolong service life and increase impact resistance Corrosion ability, improve the effect of sealing performance

Inactive Publication Date: 2012-07-04
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned patents have improved the anti-corrosion ability of valves to varying degrees, each has limitations, narrow applicability, and poor versatility, and some valves have poor anti-corrosion effects

Method used

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  • Cathodic protection corrosion-proof valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] exist figure 1 Among them, the cathodic protection anti-corrosion valve of this embodiment consists of a cap 1, a positioning screw 2, a packing gland 3, a packing 4, a valve body 5, a valve stem 6, a gland 7, a butterfly plate 8, a connecting pin 9, and a sacrificial anode sheet 10 joint composition.

[0023] On the valve body 5, an inlet a and an outlet b communicating with the cavity of the valve body 5 are made, and a side of the inlet a on the valve body 5 is fixedly connected with a gland 7 with a threaded fastening connector, and the gland 7 is connected to the valve body 5 A sealing ring is installed between them, and a valve stem 6 is radially installed inside the valve body 5, the valve stem 6 can rotate around its own axis, and a butterfly plate 8 is fixedly installed on the valve stem 6 with two coupling pins 9, the butterfly plate 8 is a circle Shaped sheet structure, the butterfly plate 8 is located in the cavity of the valve body 5, the butterfly plate 8...

Embodiment 2

[0026] In this embodiment, four sacrificial anode pieces 10 are welded on both sides of the butterfly plate 8 with the center as the center, and are evenly distributed on the circumference of the same radius, and the sacrificial anode pieces 10 can also be fixedly connected to the butterfly plate by screw fastening connectors. On the circumference of the same radius on both sides of the plate 8, the sacrificial anode sheet 10 on one side of the butterfly plate 8 and the sacrificial anode sheet 10 on the other side may or may not overlap on the circumference of the same radius. The sacrificial anode piece 10 in this embodiment is a magnesium alloy anode piece, and the shape of the sacrificial anode piece 10 is a rectangle. Other components and the coupling relationship of the components are the same as in Embodiment 1.

Embodiment 3

[0028] In this embodiment, on both sides of the butterfly plate 8 with the center as the center, four sacrificial anode sheets 10 are evenly distributed on one circumference with different radii, and 8 sacrificial anode sheets 10 are evenly distributed on the other circumference with different radii. The anode sheet 10 can also be fixedly connected to the sacrificial anode sheet 10 on the circumference of the same radius on both sides of the butterfly plate 8 with a threaded fastening connector, and the sacrificial anode sheet 10 on one side of the butterfly plate 8 is connected to the sacrificial anode sheet 10 on the other side. On the circumference of the same radius, they can be coincident or not. The sacrificial anode piece 10 in this embodiment is a magnesium alloy anode piece, and the shape of the sacrificial anode piece 10 is a rectangle. Other components and the coupling relationship of the components are the same as in Embodiment 1.

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Abstract

The invention discloses a cathodic protection corrosion-proof valve. An inlet a and an outlet b which are communicated with a valve chamber are arranged on a valve body; a gland is arranged on one side of the inlet a on the valve body; a valve rod capable of rotating around an axis thereof is arranged in the valve body; a disc for opening / closing the inlet a is arranged on the valve rod; a fillergland and a filler are arranged between the top end of the valve rod and the valve body; and sacrificial anode plates are arranged on the two sides of the disc respectively. In the valve, because thesacrificial anode plates are arranged on the two sides of the disc respectively, when the valve is used, both the arranged sacrificial anode plates and components to be protected are positioned in liquid, the sacrificial anode plates change into ions to enter the liquid, and lost electrons are transmitted to components in the valve to protect the components. Under the action of the sacrificial anode plates, the components inside the valve are in a cathodic protection state so as to protect valve materials from the corrosion of fluid media, improve the erosion resistance and sealing performance of the valve and prolong the service life of the valve.

Description

technical field [0001] The invention relates to a valve used in liquid pipelines, in particular to a corrosion-resistant valve. Background technique [0002] As one of the main core components of pressure pipelines, valves are an important part of pressure pipelines. They are widely used in petrochemical, gas, metallurgy, electric power and other important industrial facilities and urban lifeline projects. They play an important role in national economic construction and people's production activities. effect. However, various types of liquid pipeline control valves in use now will produce different degrees of corrosion, which will affect the sealing performance. Valve corrosion will cause material waste, increase energy consumption, cause valve leakage, pollute the environment, cause casualties, and threaten safe production. All of the above situations will bring different degrees of economic losses. [0003] At present, in the existing patented technology, the commonly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/22C23F11/10
Inventor 陈兵樊玉光周三平林红先
Owner XI'AN PETROLEUM UNIVERSITY
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