CN203297618U - Sealing ring anti-disengaging sealing structure and sealing ring groove thereof - Google Patents

Abstract

The utility model discloses a sealing ring anti-disengaging sealing structure and a sealing ring groove thereof. One groove wall face of the sealing ring groove is provided with an annular boss which protrudes towards interior of the groove and extends in the circumferential direction of a main sealing ring groove, the boss is provided with an annular joint part which is used for being tangent to the sealing ring to prevent the sealing ring from being disengaged, and the perpendicular distance between the joint part and the groove bottom surface of the sealing ring is larger than the radius of cross section of the sealing ring groove. Under the action of the annular boss, even if a flange in which the sealing ring groove is formed is arranged vertically or inversely, the phenomenon that the sealing ring is disengaged from the sealing ring groove does not occur.

Description

A sealing ring anti-falling sealing structure and its sealing ring groove

technical field

The utility model relates to a sealing structure, in particular to a sealing ring anti-dropping sealing structure and a sealing ring groove. the

Background technique

The traditional cylinder butt joint adopts flange connection. In order to ensure the sealing effect between the two flange butt joint end faces of the butt joint cylinder and prevent air leakage, an O-ring seal is generally used between the two flange butt joint end faces. , that is, open a U-shaped sealing ring groove on the flange butt joint end surface of one of the flanges, and then insert the sealing ring into the sealing ring groove. When the two flanges are squeezed, the sealing ring will be squeezed and deformed, thereby achieving Sealing effect, this sealing structure has the advantages of simple structure and strong sealing. However, this sealing structure also has deficiencies. If the butt joint area of the cylinder flange is large, the diameter of the sealing ring will be too large, sometimes reaching more than 1500 mm. When the flange butt ends with sealing ring grooves are installed vertically or upside down to assemble the sealing ring, it is easy to cause the sealing ring to fall off from the sealing ring groove; in order to completely prevent it from falling off, the traditional method is to use the seal ring groove or seal Apply a large amount of sealant or sealant on the ring, which seriously affects the sealing effect of the cylinder. the

Utility model content

The purpose of this utility model is to provide a sealing ring groove that can prevent the large-diameter sealing ring from falling off from the end face of the flange that is upright or inverted; at the same time, the utility model also provides a sealing ring that uses the sealing ring groove to prevent falling off sealing structure . the

The sealing ring groove of the utility model adopts the following technical scheme: a sealing ring groove of a sealing ring anti-falling sealing structure, one of the groove wall surfaces of the sealing ring groove has a groove protruding into the groove, along the circumferential direction of the main sealing ring groove An extended annular boss, the boss has an annular junction for tangent to the sealing ring and for preventing the sealing ring from falling off, the vertical distance from the junction to the bottom surface of the sealing ring groove is greater than the cross-sectional radius of the sealing ring. the

The outer peripheral surface of the boss is an arc surface, and the joint part is the arc top of the arc surface, and the part of the arc surface between the joint part and the notch edge of the sealing ring groove extends to the edge of the notch, and the arc surface part The triangular area between the plane and the notch edge forms a secondary sealing ring groove. the

The sealing ring anti-shedding sealing structure of the utility model adopts the following technical scheme: a sealing ring anti-shedding sealing structure, including the first flange and the second flange which are connected, and the flange butt joint end surface of the first flange is provided with a The U-shaped main seal ring groove in which the O-shaped seal ring is embedded, one of the groove wall surfaces of the main seal ring groove has an annular boss protruding into the groove and extending circumferentially along the main seal ring groove, the boss has An annular joint part tangent to the sealing ring and used to prevent the sealing ring from falling off, the vertical distance from the joint part to the bottom surface of the sealing ring groove is greater than the cross-sectional radius of the sealing ring. the

The outer peripheral surface of the boss is an arc surface, and the joint part is the arc top of the arc surface, and the part of the arc surface between the joint part and the notch edge of the sealing ring groove extends to the edge of the notch, and the arc surface part The triangular area between the flange abutting end face of the second flange forms a secondary sealing ring groove. the

With the seal ring groove of the above structure, since one of the groove wall surfaces protrudes into the groove, an annular boss extending along the circumferential direction of the seal ring groove is provided, and the joint part on the boss used to be tangent to the seal ring can be opposite to it. The other groove wall of the main sealing ring groove cooperates to extrude the sealing ring to prevent the sealing ring from falling off from the main sealing ring groove. Therefore, under the action of the annular boss, even if the flange with the sealing ring groove is placed vertically Or upside down, the sealing ring will not fall off from the sealing ring groove. the

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of sealing ring anti-shedding sealing structure of the present utility model;

Fig. 2 is a schematic diagram of the state when no sealing ring is installed in Fig. 1;

Fig. 3 is a schematic diagram of the state of the utility model after the sealing ring is extruded.

Detailed ways

The embodiment of the anti-falling sealing structure of the utility model sealing ring: as shown in Fig. The main seal ring groove 5, the O-ring 2 is embedded in the main seal ring groove 5, and on the inner groove wall surface of the main seal ring groove 5, there is a ring protruding into the groove and extending along the circumferential direction of the main seal ring groove 5 The annular boss 3, the boss 3 has a junction tangent to the sealing ring 2, the distance between the junction and the bottom surface of the main sealing ring groove 5 is greater than the cross-sectional radius of the sealing ring 2, so that when the sealing ring 2 When embedded in the sealing ring groove 5, the joint portion of the boss 3 can prevent the sealing ring from falling off. the

As a further optimization, the outer peripheral surface of the annular boss 3 is an arc surface, the arc top of the arc surface is the junction of the boss 3, and the arc surface is located between the junction and the notch edge of the sealing ring groove 5 Part of it extends to the edge of the notch, that is, to the flange butt joint end surface of the first flange 1 , and the arc surface part cooperates with the flange butt joint end surface of the second flange 4 to form a secondary sealing ring groove. the

As shown in Figure 1, when the sealing ring 2 is embedded in the main sealing ring groove 5, the sealing ring 2 is squeezed into the main sealing ring groove 5 under the cooperation of the annular boss 3 and the outer wall of the main sealing ring groove 5 , so as to prevent the sealing ring 2 from falling off from the main sealing ring groove 5; When the cylinder is filled with high-pressure gas, the sealing ring 2 will be subjected to the pressure exerted by the high-pressure gas from the inside of the cylinder, and finally the sealing ring 2 will be squeezed outward and filled with the secondary seal while squeezing into the main sealing ring groove 5. The ring groove acts as a double seal. the

In other embodiments, the annular boss can also be arranged on the outer groove wall surface of the main sealing ring groove. the

The embodiment of the seal ring groove of the present utility model is as shown in Fig. 1-3, which is consistent with the structure of the seal ring groove in the above embodiment, and its content will not be repeated here.

Claims (4)

1. A sealing ring groove of a sealing ring anti-falling sealing structure, characterized in that: one of the groove wall surfaces of the sealing ring groove has an annular boss protruding into the groove and extending circumferentially along the main sealing ring groove, The boss has an annular joining portion for being tangent to the sealing ring and preventing the sealing ring from falling off, and the vertical distance from the joining portion to the bottom surface of the sealing ring groove is greater than the cross-sectional radius of the sealing ring. 2. The seal ring groove of the seal ring anti-falling sealing structure according to claim 1, characterized in that: the outer peripheral surface of the boss is an arc surface, the joint part is the arc top of the arc surface, and the arc surface is located The part between the joint part and the notch edge of the sealing ring groove extends to the notch edge, and the triangular area between the arc surface part and the plane where the notch edge is located forms a secondary sealing ring groove. 3. A sealing ring anti-falling sealing structure, including a butt first flange and a second flange, the flange butt joint end surface of the first flange is provided with a U-shaped main seal ring groove for the O-ring to embed, It is characterized in that: one of the groove walls of the main sealing ring groove has an annular boss protruding into the groove and extending along the circumferential direction of the main sealing ring groove, and the boss has a tangent to the sealing ring for The ring-shaped joint part for preventing the seal ring from falling off, the vertical distance from the joint part to the bottom surface of the seal ring groove is greater than the cross-sectional radius of the seal ring. 4. The seal ring anti-falling sealing structure according to claim 3, characterized in that: the outer peripheral surface of the boss is an arc surface, the joint is the arc top of the arc, and the arc is located at the joint and the seal The part between the notch edge of the ring groove extends to the notch edge, and the triangular area between the arc surface part and the flange abutting end surface of the second flange forms a secondary sealing ring groove.

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