Corrosion-resistant valve body

Abstract

The utility model discloses a corrosion-resistant valve body, which relates to the technical field of valve bodies and comprises a valve body with a valve cavity, and the valve cavity is communicated with the outer side of the valve body and is bent. The nickel-phosphorus alloy layer is fixed outside the valve body and on the valve cavity in a chemical plating manner; the epoxy zinc-rich paint layer is attached and fixed outside the nickel-phosphorus alloy layer in a dip-coating mode; the fluorocarbon paint layer is attached and fixed outside the epoxy zinc-rich paint layer in a dip-coating mode; a hole groove is formed outside the valve body; the valve body has the advantages that the nickel-phosphorus alloy layer, the epoxy zinc-rich paint layer and the fluorocarbon paint layer are fixedly arranged outside the valve body and on the valve cavity in a chemical plating and dip-coating mode in sequence, the overall corrosion resistance is good, the valve body with the valve cavity of a complex structure can be conveniently processed, the overall compatibility is good so that the stability and durability of a whole coating system can be guaranteed, and the service life of the valve body is prolonged. Meanwhile, a sequential wrapping mode is adopted for setting, so that the corrosion resistance is further improved; and the protection layer is additionally arranged, so that the protection performance of the weak position of the hole groove is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve body more particularly relates to a kind of corrosion-resistant valve body. BACKGROUND

[0002] Corrosion-resistant valve body refers to those that can resist the erosion of various corrosive media valve parts, this kind of valve body is usually used in chemical industry, petroleum, pharmaceutical industry etc., because these industries often need to handle acid, alkali, salt and other fluids with strong corrosive, to ensure long-term stable work in these harsh environments, corrosion-resistant valve body will use special material to manufacture, or special treatment is carried out on its surface;

[0003] The existing corrosion-resistant valve body "such as application number: CN202021880175.3, a kind of corrosion-resistant valve body" as shown, with "metal oxide layer, corrosion-resistant layer" to improve the corrosion resistance of valve body, but the overall integrity of the anti-corrosion treatment is low and there is the shortcoming of poor corrosion resistance, and for the valve body with more complex valve cavity (such as reversing valve body etc.) is not easy to handle use. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of corrosion-resistant valve body to solve the above technical problems.

[0005] The utility model discloses the following technical solutions to realize the above-mentioned purposes specifically:

[0006] The utility model provides a kind of corrosion-resistant valve body, including the valve body with valve cavity, valve cavity is connected with valve body outside, valve cavity is curved;

[0007] It further includes nickel-phosphorus alloy layer, which is fixed on the valve body and valve cavity by chemical plating method;

[0008] Epoxy zinc-rich paint layer is fixed on the outside of nickel-phosphorus alloy layer by dipping method.

[0009] Fluorocarbon paint layer is fixed on the outside of epoxy zinc-rich paint layer by dipping method.

[0010] As a preferred technical solution of the utility model, the valve body is provided with a hole slot.

[0011] As a preferred technical solution of the utility model, the hole slot and its periphery are provided with an additional protective layer, and the additional protective layer is fixed on the outside of the fluorocarbon paint layer.

[0012] As a preferred technical solution of the utility model, the additional protective layer is a fluorocarbon paint layer or an acrylic paint layer.

[0013] The utility model has the following beneficial effects:

[0014] By sequentially applying a nickel-phosphorus alloy layer, an epoxy zinc-rich paint layer, and a fluorocarbon paint layer to the valve body and valve cavity using chemical plating and dip coating, the overall corrosion resistance is good, facilitating the processing of valve bodies with complex valve cavity structures. Furthermore, the good overall compatibility ensures the stability and durability of the entire coating system. The sequential wrapping method further enhances corrosion resistance. An additional protective layer is added to improve protection of weak points in the orifices and grooves. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Reference numerals: Valve body-1, Valve cavity-2, Nickel-phosphorus alloy layer-3, Epoxy zinc-rich paint layer-4, Fluorocarbon paint layer-5, Protective layer-6. Detailed Implementation Example 1:

[0017] like Figure 1 As shown, this embodiment proposes a corrosion-resistant valve body, including a valve body 1 with a valve cavity 2, the valve cavity 2 being connected to the outside of the valve body 1, and the valve cavity 2 being curved, that is, the valve cavity 2 structure of the valve body 1 is relatively complex.

[0018] It also includes a nickel-phosphorus alloy (Ni-P) layer 3, which is fixed to the outside of the valve body 1 and the valve cavity 2 by chemical plating;

[0019] The nickel-phosphorus alloy layer 3 exhibits excellent corrosion resistance and wear resistance;

[0020] When setting the nickel-phosphorus alloy layer 3, the valve body 1 is cleaned in advance to remove impurities such as oil and rust. The cleaned valve body 1 is then placed in the chemical plating solution of the nickel-phosphorus alloy. Through chemical reaction, a uniform nickel-phosphorus alloy layer 3 is deposited on the surface of the valve body 1. The nickel-phosphorus alloy layer 3 has high overall coverage of the valve body 1 to improve isolation and corrosion resistance. Furthermore, the chemical plating solution directly contacts the inner and outer surfaces of the valve body 1, which can conveniently process valve bodies 1 with complex valve cavity 2 structures.

[0021] The epoxy zinc-rich paint layer 4 is bonded and fixed to the outside of the nickel-phosphorus alloy layer 3 by dip coating.

[0022] The epoxy zinc-rich paint layer 4 has good fluidity and uniform coverage, and the zinc-rich component can further improve the anti-corrosion performance.

[0023] In the process of setting the epoxy zinc-rich paint layer 4, the surface of the nickel-phosphorus alloy layer 3 has a certain roughness to provide a good substrate to enhance the adhesion of the subsequent coating, the valve body 1 after electroless plating of the nickel-phosphorus alloy layer 3 is completely immersed in the solution of the epoxy zinc-rich paint, the immersion coating time and temperature are controlled to ensure the uniformity of the epoxy zinc-rich paint layer 4 formed on the surface of the nickel-phosphorus alloy layer 3, and the overall wrapping of the nickel-phosphorus alloy layer 3 is high to improve the insulation and corrosion resistance.

[0024] The fluorocarbon paint layer 5 is fixedly attached to the outside of the epoxy zinc-rich paint layer 4 by immersion coating.

[0025] The fluorocarbon paint layer 5 has excellent weather resistance and decorative effect;

[0026] In the process of setting the fluorocarbon paint layer 5, the compatibility of the material of the epoxy zinc-rich paint layer 4 with the fluorocarbon paint layer 5 is good, which can ensure the stability and durability of the entire coating system, the valve body 1 coated with the epoxy zinc-rich paint layer 4 is immersed in the solution of the fluorocarbon paint again, and the immersion coating conditions (such as temperature and time) are controlled to ensure the quality and appearance of the fluorocarbon paint layer 5 formed on the surface of the epoxy zinc-rich paint layer 4, and the overall wrapping of the epoxy zinc-rich paint layer 4 is high to improve the insulation and corrosion resistance.

[0027] In summary, by applying the nickel-phosphorus alloy layer 3, the epoxy zinc-rich paint layer 4, and the fluorocarbon paint layer 5 to the valve body 1 in turn, a multi-layer and multi-function corrosion-resistant protective structure can be constructed from the inside out, greatly improving the durability of the product and enhancing its ability to adapt to harsh working environments. Example 2:

[0028] As shown in Figure 1 the difference between example 1 is that the valve body 1 is provided with a hole slot, which can be required to reserve a hole or a groove or a flange hole at a specific position according to the specific use of the valve (such as the need to install a sensor or other accessories).

[0029] The hole slot and its periphery are provided with an additional protective layer 6, and the additional protective layer 6 is fixed outside the fluorocarbon paint layer 5, and the additional protective layer 6 is additionally provided outside the fluorocarbon paint layer 5 corresponding to the position of the hole slot.

[0030] The necessity of the additional protective layer 6 is that although the above-mentioned corrosion protection can better cover the outer and inner surfaces of the valve body 1, there may be a situation that the coating is not uniform for the very narrow or long hole slot, and therefore the additional protective layer 6 is added to improve the protection of the weak position.

[0031] The additional protective layer 6 is a fluorocarbon paint layer or an acrylic paint layer, which can improve the corrosion resistance;

[0032] Fluorocarbon paint, with excellent weather resistance, corrosion resistance and self-cleaning performance, can resist ultraviolet degradation, long time color stability; at the same time, it also has good resistance to chemicals;

[0033] Acrylic paint, with fast drying speed, bright and full color, good adhesion, and certain water resistance and wear resistance, and fluorocarbon paint is slightly worse in weather resistance and anti-aging.

[0034] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A corrosion-resistant valve body, comprising a valve body (1) having a valve cavity (2) which communicates with the outside of the valve body (1) and is in a curved shape; further comprising a nickel-phosphorus alloy layer (3) fixed on the outside of the valve body (1) and the valve cavity (2) by chemical plating; an epoxy zinc-rich paint layer (4) fixed on the outside of the nickel-phosphorus alloy layer (3) by dip coating; a fluorocarbon paint layer (5) fixed on the outside of the epoxy zinc-rich paint layer (4) by dip coating; and a hole slot provided on the outside of the valve body (1); the hole slot and its periphery are provided with an additional protective layer (6) fixed on the outside of the fluorocarbon paint layer (5). characterized in that The additional protective layer (6) is a fluorocarbon paint layer or an acrylic paint layer. ​ ​ ​ ​ 2. A corrosion resistant valve body as defined in claim 1, wherein ​

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