CN2814034Y - C type ring sealing spacer - Google Patents

Abstract

The utility model discloses a C-type ring sealing gasket. The C-type ring sealing gasket has a "C-like" or "bow" cross-section, and the inner concave arc radius R4 is the same as the inner convex arc radius R3. , the arc radius R1 of the outer concave arc is greater than the arc radius R2 of the outer convex arc, the inner concave distance L2 is the same as the outer convex distance L1, and the middle part of the outer convex part is a straight line transition, using 20# steel or general manufacturing steel, segmented Formed by stamping and then butt welded. The utility model has low cost of raw materials, simple manufacturing and processing, good tolerance under working conditions, long service life, simulated sealing effect, three-side contact during use, self-tightening sealing function, and good sealing effect.

Description

C-type ring gasket

Technical field:

The utility model relates to a gasket, in particular to an annular gasket used in bolted flange connections.

Background technique:

With the development of high temperature, high pressure and large-scale industries such as petroleum and chemical industry, detachable connections are indispensable. Most of the detachable connections use bolted flange connections, and the leakage is the most important part of the bolted flange connection project. Important economic indicators, the connecting part between the upper and lower flanges - the gasket is a key element that affects the leakage. Therefore, the mechanical properties and sealing performance of the gasket have always been the focus of research by technicians from all sides. The Chinese patent with the notification number CN2674239 discloses a "flange gap sealing ring". The sealing ring adopts an annular opening with a nail-shaped cross section. Simple, easy to use, and can be tightened by self-expansion, but the fatigue resistance and service life are limited; the Chinese patent with the notification number CN2462150 discloses a "metal pipe sealing gasket", which uses metal flat strips and graphite layers to overlap to form a seal The cross-section of the ring and the metal flat belt is "W" shape, which makes the structure have good compression resistance and long service life, but it is still in contact with two sides, which cannot achieve self-tight sealing.

Invention content:

The utility model provides a C-shaped ring-like sealing gasket with reliable sealing and safe use in view of the above deficiencies. The sealing gasket can realize three-side contact and fully self-tight sealing.

The technical scheme that the utility model takes is:

A C-like ring sealing gasket is characterized in that its cross-section is "C-like" or "bow".

In the C-like ring sealing gasket, the arc diameters of the inner concave arc and the inner convex arc are the same, the arc diameter of the outer concave arc is larger than that of the outer convex arc, and the middle part of the outer convex part is a straight line transition.

In the C-like ring sealing gasket, the distance between the concave and the convex is the same.

The C-like ring sealing gasket is stamped and formed by 20# steel or general manufacturing steel.

The technical effect that the utility model can reach is:

1. The material of the utility model is 20# steel or steel for general container manufacturing. The cost of raw materials is low, the manufacturing process is simple, the tolerance is good under working conditions, and the service life is long.

2. The utility model adopts a double-groove ring seal instead of a concave-convex ring seal, which makes the sealing surface processing simple, and the sealing effect is simulated. The results show that the effect of the concave-convex ring seal is better than that of the concave-convex ring seal in the use of medium-voltage equipment.

3. The utility model can be molded by segmental die-casting and then butt-welded. When in use, three sides are in contact, and it has the function of self-tightening sealing, and the sealing effect is good.

4. The sealing surface of the flange of the utility model can be processed by double-groove turning, which makes the manufacturing and processing of the flange simpler, and the opening of the sealing groove is easy to process.

Description of drawings:

Fig. 1 is a schematic cross-sectional view of the utility model.

Fig. 2 is a schematic diagram of the assembly of the utility model and the flange.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1 and Figure 2: the section of this type of C-ring gasket is "like C" or "bow", the inner concave arc radius R4 is the same as the inner convex arc radius R3, and the outer concave arc radius R4 is the same as that of the inner convex arc radius R3. The arc radius R1 is greater than the arc radius R2 of the convex arc, the concave distance L2 is the same as the convex distance L1, and the middle part of the convex part is a straight line transition, using 20# steel or general manufacturing steel, stamping and forming in sections , and then butt welded.

When in use, the gasket is achieved by close contact between the upper and lower protruding parts and the outer side of the sealing ring and the sealing surface of the upper and lower flange grooves. When the fastener is tightened, the sealing ring is elastically compressed, and the upper and lower contact surfaces of the ring are formed. The initial sealing specific pressure, so as to achieve the purpose of sealing, when the internal pressure rises, the flanges tend to separate from each other due to the medium pressure, and the inner cavity of the sealing ring is also affected by the medium pressure, so that the sealing ring is axially opened, thus ensuring tightness.

Claims (4)

1. A C-like ring gasket, characterized in that its cross-section is "C-like" or "bow". 2. The C-like ring sealing gasket according to claim 1, characterized in that: the arc radius (R4) of the inner concave arc is the same as the arc radius (R3) of the inner convex arc, and the arc radius (R1) of the outer concave arc is larger than The arc radius (R2) of the convex arc, the middle part of the convex part is a straight line transition. 3. The C-type ring-like sealing gasket according to claim 1 or 2, characterized in that the concave distance (L2) is the same as the convex distance (L1). 4. The C-type ring-like sealing gasket according to claim 3, characterized in that: 20# steel or general manufacturing steel is used for stamping and forming.

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