CN202691033U - O-ring anti-extrusion structure - Google Patents

Abstract

The utility model discloses a release structure is prevented to O shape circle, include transmission cover, jackscrew, spring, throw-out collar, prevent throw-out collar, O shape circle, support ring, snap ring and rotating ring, transmission cover and rotating ring are installed on the axle sleeve, and jackscrew and spring mounting are at the right-hand member of transmission cover, and one side top of throw-out collar is on the spring, and the opposite side is pasted on the rotating ring, prevents that throw-out collar, O shape circle and support ring are installed respectively in the recess of rotating ring, and O shape circle is pasted on preventing the throw-out collar, and the snap ring is installed in the left end recess of transmission cover. The utility model relates to a release structure is prevented to O shape circle has solved bi-polar face O shape circle multi-spring seal and has stopped in APIPLAN53 and APIPLAN54 system and open the condition that stops O shape circle release under or the abnormal conditions, increases sealed moving reliability and security.

Description

O-ring anti-extrusion structure

technical field

The utility model relates to an O-ring anti-pull-out structure. the

Background technique

In the prior art, the ordinary O-ring multi-spring double-end mechanical seal structure, as shown in Figure 1, mainly includes a transmission sleeve, a top wire, a spring, a push ring, an O-ring, a support ring, a snap ring and 8 moving rings. , API PLAN53 or API PLAN54 schemes are often used. When the above two flushing schemes are used, the pressure of the seal chamber is higher than the medium pressure, but when the actual start-up or the system pressure is unstable, the pressure of the seal chamber will be lower than the medium pressure. At this time, the pressure on the medium side will push the O-ring and the support ring to the right to make the seal invalid. the

Utility model content

The purpose of the utility model is to provide an O-ring anti-pull-out structure. the

The technical solution adopted by the utility model to achieve the above purpose is: an O-ring anti-extrusion structure, including a transmission sleeve, a top wire, a spring, a push ring, an anti-push ring, an O-ring, a support ring, a snap ring and a moving The drive sleeve and the moving ring are installed on the shaft sleeve, the top wire and the spring are installed on the right end of the drive sleeve, one side of the push ring is pressed against the spring, and the other side is attached to the moving ring. The anti-push ring, O The ring and the support ring are respectively installed in the groove of the moving ring, the O-ring is attached to the anti-push ring, and the snap ring is installed in the groove at the left end of the transmission sleeve. the

The right end of the anti-push ring is supported on the transmission sleeve. the

The utility model is an anti-pull-out structure of an O-ring, which solves the situation that the double-end O-ring multi-spring seal is started and stopped in the API PLAN 53 and API PLAN54 systems or under abnormal circumstances, and the O-ring is pushed out, increasing the reliability of the sealing operation and security. the

Description of drawings

Fig. 1 is a schematic structural diagram of an O-ring mechanical seal in the prior art. the

Fig. 2 is a schematic diagram of an O-ring anti-extrusion structure of the utility model. the

Detailed ways

As shown in Figure 2, the anti-extrusion structure of the O-ring includes a transmission sleeve 1, a top wire 2, a spring 3, a push ring 4, an anti-push ring 5, an O-ring 6, a support ring 7, a snap ring 8 and a moving ring 9 , the transmission sleeve 1 and the moving ring 9 are installed on the shaft sleeve, the top wire 2 and the spring 3 are installed on the right end of the transmission sleeve 1, one side of the push ring 4 is pressed against the spring 3, and the other side is attached to the moving ring 9, The anti-push ring 5, O-ring 6 and support ring 7 are respectively installed in the groove of the moving ring 9, the O-ring 6 is attached to the anti-push ring 5, and the snap ring 8 is installed in the groove at the left end of the transmission sleeve 1. The utility model adds an anti-push ring 5 to the original conventional O-ring seal. When the medium pressure is higher than the pressure of the sealing chamber, the right end of the anti-push ring is supported on the transmission sleeve, and the O-ring is pushed out through the top wire, so that the seal can be Normal operation, when the seal works normally, the anti-thrust ring can float with the O-ring without affecting its floatability. the

Claims (2)

1. An O-ring anti-extrusion structure, characterized in that: it includes a transmission sleeve, a top wire, a spring, a push ring, an anti-push ring, an O-ring, a support ring, a snap ring and a moving ring, the transmission sleeve and the moving ring The ring is installed on the shaft sleeve, the top wire and the spring are installed on the right end of the transmission sleeve, one side of the push ring is pressed against the spring, and the other side is attached to the moving ring, and the anti-push ring, O-ring and support ring are respectively installed on the In the groove of the moving ring, the O-ring is attached to the anti-push ring, and the snap ring is installed in the groove at the left end of the transmission sleeve. 2. The anti-extrusion structure of the O-ring according to claim 1, wherein the right end of the anti-push ring is supported on the transmission sleeve.

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