CN212360859U - Floating ball valve with elastic double-sealing valve seat - Google Patents

Abstract

The utility model discloses a ball valve that floats with elasticity dual seal disk seat solves the problem that the disk seat of ball valve that floats easily became invalid. The valve seat is arranged in the valve body and comprises a first ring surface, a second ring surface and an arched surface, the first ring surface and the second ring surface are respectively positioned in the radial direction and the axial direction of the valve seat, the edges of the first ring surface and the second ring surface respectively form a first sealing pair and a second sealing pair which are in linear sealing fit when contacting with the ball, and a recess is formed on the valve seat between the first sealing pair and the second sealing pair; the recess is located on the inboard position of being close to the spheroid, and the archy face is located the relative outside direction of recess and is close to the position of valve body inner wall, and the edge of archy face sets up with valve body inner wall counterbalance. Under the action of the floating ball and the medium, the shape of the valve seat can be elastically changed along with the change of the medium pressure, so that the sealing failure caused by the pressure damage of the valve seat is avoided, and the function of reducing the opening and closing torque is also realized.

Description

Floating ball valve with elastic double-sealing valve seat

Technical Field

The utility model belongs to the technical field of the ball valve and specifically relates to a ball valve that floats with elasticity dual seal disk seat.

Background

The ball body of the floating ball valve is floating, and under the pressure of a medium, the ball body can generate certain displacement and is tightly pressed on the sealing surface of the outlet end to ensure the sealing of the outlet end. However, the floating ball bears the load of the working medium and is completely transmitted to the outlet sealing ring, so whether the valve seat can bear the working load of the floating ball medium is a problem which is always concerned by the technical personnel. The valve seat in the floating ball valve appearing on the market at present is very easy to damage when the medium pressure is large, and the leakage is caused when the sealing is invalid.

Disclosure of Invention

The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a ball valve floats with elasticity dual seal disk seat solves the problem that the disk seat of ball valve floats easily became invalid.

The technical scheme of the utility model: the valve seat is arranged in the valve body and comprises a first ring surface, a second ring surface and an arched surface, the first ring surface and the second ring surface are respectively positioned in the radial direction and the axial direction of the valve seat, the edges of the first ring surface and the second ring surface respectively form a first sealing pair and a second sealing pair which are in linear sealing fit when contacting with the ball, and a recess is formed on the valve seat between the first sealing pair and the second sealing pair; the concave is positioned at the inner side position close to the ball body, the arched surface is positioned at the outer side direction opposite to the concave and at the position close to the inner wall of the valve body, and the edge of the arched surface is abutted to the inner wall of the valve body.

By adopting the technical scheme, the first ring surface is in contact with the ball body to form a first sealing pair when the pressure of the medium is increased, and the first ring surface is pressed and deformed along with the increase of the pressure of the medium, and the recess is sunken to enable the first sealing pair to be sealed more tightly, and simultaneously, the edge of the second ring surface is in contact with the ball body to form a second sealing pair of a second sealing; in addition, under the action of the arched surface, the valve seat can be elastically compensated and can be restored to the original shape; under the action of the floating ball and the medium, the shape of the valve seat can be elastically changed along with the change of the medium pressure, so that the sealing failure caused by the pressure damage of the valve seat is avoided, and the function of reducing the opening and closing torque is also realized.

The utility model discloses a further setting: the cross-sectional shape of the recess is an inferior angle shape.

With the above further arrangement, the recess is more easily recessed.

The utility model discloses a further setting again: a sealing gasket is arranged between the outer edge of the valve seat between the first annular surface and the arched surface and the valve body.

By adopting the above further arrangement, the failure of the arched surface caused by the medium entering between the arched surface and the valve body is avoided.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the present invention taken before assembly at A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the utility model shown in FIG. 1 after assembly;

FIG. 4 is an enlarged view of a portion of the present invention shown in FIG. 1 under pressure;

the sealing structure comprises a valve seat 1, a valve body 2, a ball 3, a first annular surface 11, a second annular surface 12, an arched surface 13, a first sealing pair 4, a second sealing pair 5, a recess 14 and a sealing gasket 6.

Detailed Description

As shown in fig. 1-4, the ball valve comprises a valve seat 1, a valve body 2 and a floating ball 3, wherein the valve seat 1 is arranged in the valve body 2, the valve seat 1 comprises a first ring surface 11, a second ring surface 12 and an arc surface 13, the first ring surface 11 and the second ring surface 12 are respectively located in the radial direction and the axial direction of the valve seat, the edges of the first ring surface 11 and the second ring surface 12 respectively form a first sealing pair 4 and a second sealing pair 5 which are in line sealing fit when contacting with the ball, and a recess 14 is formed on the valve seat between the first sealing pair 4 and the second sealing pair 5; the dent 14 is positioned at the inner side position close to the ball body, the edges at two sides of the dent 14 and the ball body form a first sealing pair 4 and a second sealing pair 5, the arch surface 13 is positioned at the position which is opposite to the outer side direction of the dent 14 and is close to the inner wall of the valve body 2, and the edge of the arch surface 13 is propped against the inner wall of the valve body 2. First anchor ring 11 forms first sealed pair 4 during with spheroid 3 contact during the low pressure, along with medium pressure rising, first anchor ring 11 pressurized deformation back, sunken 14 invaginations make first sealed pair 4 sealed inseparabler, thereby still make the edge of second anchor ring 12 and spheroid 3 contact formation second seal pair 5 that the second was sealed, thereby realized dual seal effect. In addition, under the action of the arched surface 13, the valve seat 1 can elastically compensate and restore the whole valve seat 1, and has the function of elastic memory compensation. Under the action of the floating ball 3 and a medium, the shape of the valve seat 1 can be elastically changed along with the change of the pressure of the medium, so that the valve seat 1 is prevented from being damaged by pressure to cause sealing failure, and the valve seat also has the function of reducing the opening and closing torque. In order to ensure the sealing effect at low pressure, the first sealing pair 4 is properly set to a point compression amount before the valve is assembled, so that the ball body 3 extrudes the point compression amount after the valve is assembled, the first annular surface 11 is completely contacted with the ball body 3, and the sealing effect of the first sealing pair 4 is better.

The cross-sectional shape of the recess 14 is a slightly angled shape, i.e., an angle less than 180 °, thus making the recess 14 more prone to invagination.

A sealing gasket 6 is arranged between the outer edge of the valve seat 1 between the first annular surface 11 and the arched surface 13 and the valve body 1, so that the arch surface 13 is prevented from failing due to the fact that media enter between the arched surface 13 and the valve body.

Claims (3)

1. The utility model provides a ball valve that floats with elasticity double seal disk seat, is including disk seat, valve body and unsteady spheroid, the disk seat sets up in the valve body its characterized in that: the valve seat comprises a first ring surface, a second ring surface and an arched surface, the first ring surface and the second ring surface are respectively positioned in the radial direction and the axial direction of the valve seat, the edges of the first ring surface and the second ring surface respectively contact with a ball to form a first sealing pair and a second sealing pair which are in linear sealing fit, and a recess is formed on the valve seat between the first sealing pair and the second sealing pair; the concave is positioned at the inner side position close to the ball body, the arched surface is positioned at the outer side direction opposite to the concave and at the position close to the inner wall of the valve body, and the edge of the arched surface is abutted to the inner wall of the valve body.

2. A floating ball valve having a resilient double-sealing seat as defined in claim 1, wherein: the cross-sectional shape of the recess is an inferior angle shape.

3. A floating ball valve with a resilient double sealing seat according to claim 1 or 2, characterized in that: and a sealing gasket is arranged between the outer edge of the valve seat between the first annular surface and the arched surface and the valve body.

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