CN201059400Y - a sealing flange - Google Patents

Abstract

A sealing flange, including left and right flanges that cooperate with each other, and a sealing ring arranged between the left and right flanges, the lower end of the joint of the left and right flanges is provided with an installation sealing ring The cavity, and the right flange is made of elastic material, and there is an inclination angle of β between the joint surface of the flange and the left flange. The right flange of the utility model is elastically deformed and flattened under the action of force, and the material at the contact of the two flanges is deformed, so that the flange achieves a better sealing effect; the flange produces At the same time of deformation, the gap at the internal joint of the two flanges is minimized, and no eddy current is formed when the fluid medium flows through the joint; and the fluid medium does not directly act on the sealing ring, which reduces the pressure on the flange joint and the sealing ring. wear and prolong its service life.

Description

a sealing flange

technical field

The utility model relates to a flange of a mechanical connection part, in particular to a sealing flange.

Background technique

Flanges are one of the widely used connecting parts in general machinery. It is widely used in engineering installations. It is mainly used for the connection between pipes and pipe fittings, valves, equipment, etc. The commonly used flange is to add a gasket between the butt joint planes of two opposite flanges, and then tighten the bolts to tightly press and seal the two flanges together. Due to the large deformation of the gasket under pressure, it is difficult to ensure that the gasket is evenly stressed and has the same thickness during installation. The uneven thickness of the gasket will cause a gap at the joint of the two flanges, and the pipe inside When the fluid medium flows through the gap, eddy currents will be formed, which will accelerate the wear of the flange joints and gaskets, resulting in leakage at the flange joints. And for the large-scale bolted flange connection system (such as the bolted flange connection used for the upper cylinder of the gas turbine engine), under high-pressure working conditions, due to the need for high sealing performance of the flanged joints between the cylinders, conventional The original connection method, the number of bolts is more than 100, which not only affects the sealing effect, but also brings great inconvenience to maintenance. In addition, due to the characteristics of the fluid transported in the pipeline, dripping often occurs at the flange joint due to factors such as temperature, pressure, impact, vibration, etc., resulting in the leakage of the transported fluid and affecting normal production. Especially in the pipelines of chemical plants, acid, alkali, poisonous, harmful, flammable, and explosive gases are often transported. Once they leak, the consequences will be serious, maintenance will be troublesome, the life safety of operators will be threatened, and even accidents will occur.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art and provide a sealing flange with long service life, good sealing effect and easy maintenance.

In order to achieve the above purpose, the technical solution adopted by the utility model is: including left and right flanges that cooperate with each other, and a sealing ring arranged between the left and right flanges, the said left and right flanges are combined There is a cavity for installing a sealing ring at the lower end of the center. The right flange is made of elastic material, and there is an inclination angle of β between the joint surface of the flange and the other flange.

The sealing ring of the utility model is made of elastic material with an O-shaped structure, and has a metal skeleton inside.

The right flange of the utility model is elastically deformed and flattened under the action of force, and the material at the contact point of the two flanges is deformed, so that the flange achieves a better sealing effect; the flange produces At the same time of deformation, the gap at the joint inside the two flanges is minimized, and no eddy current is formed when the fluid medium flows through the joint; and the fluid medium does not directly act on the sealing ring, which reduces the pressure on the flange joint and the sealing ring. wear and prolong its service life.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are described in further detail.

Referring to Fig. 1, the utility model includes the left and right flanges 1, 2 that cooperate with each other, and the lower end of the joint of the left and right flanges 1, 2 is provided with a cavity for installing a sealing ring 3, and the sealing ring 3 is The O-shaped structure is made of elastic material with a metal skeleton inside, and the right flange 2 is made of elastic material, and there is an inclination angle of β between the joint surface of the right flange 2 and the left flange 1 .

Under the force action of the utility model, the right flange 2 produces elastic deformation and is flattened, while the left flange 1 is a rigid body, and the material at the contact point of the two flanges is deformed, so that the flange is better The sealing effect is achieved; while the right flange 2 is deformed, the gap at the joint inside the two flanges is minimized, and no eddy current is formed when the fluid medium flows through the joint; the fluid medium does not directly act on the sealing ring 3 , reduce the wear of flange joints and sealing rings, and prolong their service life; the pressure of the fluid medium has weakened after entering the cavity through the slits, and the O-shaped sealing ring 3 will play a sealing role under the action of its inherent stress. Even if a small amount of fluid medium can pass through the sealing ring 3, the deformation of the material on the flange surface makes the two flanges tightly combined, which can further play a sealing role. A multi-stage sealing structure is formed, which greatly enhances the sealing effect of the flange; for large-scale bolted flange connection systems, it can also reduce the number of bolts used, reduce the weight of the flange, and facilitate maintenance.

Claims (2)

1. sealing flange, comprise the left and right flanges dish (1,2) that cooperatively interacts, and be arranged on seal ring (3) between left and right flanges dish (1,2), it is characterized in that: the lower end at said left and right flanges dish (1, the 2) place of combining offers the cavity of an installation seal ring (3), right flange plate (2) is made by elastic material, and an angle is arranged between the junction plane of this flange plate and another flange plate is the tilt angle of β.

2. sealing flange according to claim 1 is characterized in that: the elastic material of the O type structure that said seal ring (3) is is made, and there is metal frame its inside.

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