CN212616897U - Corrosion-resistant blind flange - Google Patents

Abstract

The utility model discloses a corrosion-resistant blind flange, including the chassis, its characterized in that, the chassis edge is equipped with a plurality of bolt holes all around, and chassis central authorities are equipped with a boss, are equipped with first seal groove and second seal groove from outside to inside on the boss edge, and boss central authorities are recessed arc surface, and chassis and boss are integrated into one piece structure, and chassis and boss surface have chromium-layer and nickel layer by inside to outside in proper order to cover. The utility model discloses corrosion-resistant and sealing performance are good.

Description

Corrosion-resistant blind flange

Technical Field

The utility model belongs to the flange field, concretely relates to corrosion-resistant blind flange.

Background

The normal name of the blind plate is called a flange cover, and some are also called blind plate flanges or pipe plugs. It is a flange without holes in the middle, and is used for plugging the pipeline opening. In the industries of petroleum, chemical engineering, metallurgy, electric power, ships, machinery and the like, the blind flange plays a role in isolating and cutting off a pipeline, and has the same function as an end socket, a pipe cap and a welding plug, and the blind flange seal is a detachable sealing device. However, the existing blind flange has the problems of poor corrosion resistance and poor sealing performance.

SUMMERY OF THE UTILITY MODEL

Not enough to above-mentioned prior art, the utility model aims at providing a corrosion-resistant blind flange, corrosion-resistant and sealing performance are good.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a corrosion-resistant blind flange, includes the chassis, its characterized in that, the chassis edge is equipped with a plurality of bolt holes all around, and chassis central authorities are equipped with a boss, are equipped with first seal groove and second seal groove from outside to inside on the boss top surface edge, and boss central authorities are recessed arc surface, and chassis and boss are integrated into one piece structure, and chassis and boss surface have chromium layer and nickel layer by inside to outside in proper order to cover.

Further, the thickness of the chromium layer and the nickel layer is 0.3-0.5 mm.

Further, the bolt holes are at least four.

Furthermore, an O-shaped sealing ring is arranged in the first sealing groove.

Further, a lip-shaped sealing ring is arranged in the second sealing groove.

Compared with the prior art, the utility model discloses following beneficial effect has: the chromium layer and the nickel layer enable the blind flange to have good corrosion resistance; the O-shaped sealing ring and the lip-shaped sealing ring are arranged, so that the blind flange has good sealing performance under low pressure and high pressure; the concave arc surface is beneficial to transferring impact force to the periphery when being impacted by fluid, thereby improving the impact resistance of the blind flange and reducing the loss of the chromium layer and the nickel layer.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partial cross-sectional view of the present invention;

in the figure: 1. a chassis; 2. bolt holes; 3. a boss; 4. a first seal groove; 5. a second seal groove; 6. a chromium layer; 7. a nickel layer; 8. an O-shaped sealing ring; 9. lip-shaped sealing ring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the corrosion-resistant blind flange comprises a chassis 1, a plurality of bolt holes 2 are arranged around the edge of the chassis 1, a boss 3 is arranged in the center of the chassis 1, a first sealing groove 4 and a second sealing groove 5 are arranged on the edge of the top surface of the boss 3 from outside to inside, the center of the boss 3 is a concave arc surface, the chassis 1 and the boss 3 are of an integrally formed structure, and the surfaces of the chassis 1 and the boss 3 are sequentially coated with a chromium 6 layer and a nickel layer 7 from inside to outside.

The thickness of the chromium layer 6 and the nickel layer 7 is 0.3-0.5 mm; at least four bolt holes 2 are formed; an O-shaped sealing ring 8 is arranged in the first sealing groove 4, and a lip-shaped sealing ring 9 is arranged in the second sealing groove 5.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims (5)

1. The utility model provides a corrosion-resistant blind flange, includes the chassis, its characterized in that, the chassis edge is equipped with a plurality of bolt holes all around, and chassis central authorities are equipped with a boss, are equipped with first seal groove and second seal groove from outside to inside on the boss top surface edge, and boss central authorities are recessed arc surface, and chassis and boss are integrated into one piece structure, and chassis and boss surface have chromium layer and nickel layer by inside to outside in proper order to cover.

2. A corrosion resistant blind flange as claimed in claim 1 wherein said chromium and nickel layers are each 0.3 to 0.5mm thick.

3. A corrosion resistant blind flange according to claim 1 wherein said bolt holes are at least four.

4. The corrosion resistant blind flange of claim 1 wherein said first seal groove has an O-ring seal disposed therein.

5. A corrosion resistant blind flange according to claim 1 wherein a lip seal is disposed in said second seal groove.

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