CN210920193U - Valve body and ball sealing structure of gas meter ball valve - Google Patents

Abstract

The utility model relates to a ball valve technical field discloses a valve body and spheroid seal structure of gas table ball valve, the spheroid is located the valve body, the connector that is used for with gas table air inlet interface connection is established to valve body one end, and the end cover is established to the other end, is equipped with the gas outlet on the end cover, establishes the sealing washer between end cover and the spheroid, be equipped with the valve rod mounting hole on the valve body lateral wall and around the valve rod mounting hole set up with the connection structure of gear box, the end cover inboard is equipped with and uses the valve body axle center as first annular cell wall and second annular cell wall at center, constitutes the ring groove between first annular cell wall and the second annular cell wall, the sealing washer sets up the ring inslot, the clearance has between the lateral wall. The assembled sealing ring does not need to be bonded by glue, so that the assembly efficiency of the ball valve is improved; the double-deck cell wall structure in ring groove, the sealing washer is direct contact valve body's lateral wall not, and the sealing washer can keep the complete installation of shape in the ring groove, does not receive the influence of lateral wall deformation, increases the sealed effect and the improvement stability of sealing washer.

Description

Valve body and ball sealing structure of gas meter ball valve

Technical Field

The utility model relates to a ball valve technical field especially relates to a valve body and spheroid seal structure of gas table ball valve.

Background

The ball valve is a valve in which an opening and closing part (a ball body) is driven by a valve rod and rotates around the axis of the ball valve, and is used for regulating and controlling fluid. The ball valve can be closed tightly only by rotating 90 degrees and a small rotating force. Ball valves control the flow of natural gas and therefore their sealing is of great importance, but conventional ball valves typically have a sealing ring glued on the inside of the end face of the valve body, but the sealing ring will directly contact the side wall of the valve body. However, be equipped with the valve rod mounting hole on the valve body lateral wall of ball valve for the gas table and around the connection structure with the gear box that the valve rod mounting hole set up, therefore plastics valve body circumferential surface is incomplete, during the production and processing cooling, because the asymmetry of valve body, the shrinkage deformation volume on valve body lateral wall circumferential surface is inconsistent, lead to the valve body lateral wall to take place deformation, deformation is non-cylindric (ellipse and the like), and then influence the installation of sealing washer, the sealing washer can receive the extrusion of the valve body lateral wall after the deformation, the sealing washer also can have certain deflection, make the laminating degree with the spheroid sphere not enough, sealed effect is poor. In addition, in the traditional mounting process, the solidification time of glue, the best bonding time and the like cannot be mastered, the glue is operated by experience, the mounting is complicated, and after the glue is used for a long time, the viscosity of the glue is reduced, so that the sealing ring is inevitably loosened, and potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the sealing washer can influence the spheroidal sealed effect when the valve body cooling shrinkage of ball valve for the gas table warp.

In order to solve the problems, the technical scheme is as follows:

the utility model provides a gas table ball valve's valve body and spheroid seal structure, the spheroid is located the valve body, the connector that is used for with gas table air inlet interface connection is established to valve body one end, and the end cover is established to the other end, is equipped with the gas outlet on the end cover, establishes the sealing washer between end cover and the spheroid, be equipped with the valve rod mounting hole on the valve body lateral wall and around the valve rod mounting hole setting with the connection structure of gear box, the end cover inboard is equipped with first annular cell wall and second annular cell wall that uses the valve body axle center as the center, second annular cell wall radius is greater than constitute the annular groove between first annular cell wall and the second annular cell wall, the sealing washer sets up the annular groove is interior, have the clearance between the lateral wall.

After the injection molding of the valve body is demolded, the circumferential surface of the valve body is incomplete, and the side wall of the valve body can shrink and deform after being cooled. An annular groove for accommodating the sealing ring is directly formed in the inner side of the end cover of the valve body, the annular groove comprises a second annular groove wall, and a gap is formed between the second annular groove wall and the side wall of the valve body. The sealing washer is installed at the circular ring inslot, and the sealing washer is the first circular ring cell wall of direct contact and second circular ring cell wall respectively, and the sealing washer just can not the lateral wall of direct contact valve body, and the cooling shrinkage deformation of valve body lateral wall can not influence second circular ring cell wall to can not influence the sealing washer of circular ring inslot and take place phenomenons such as displacement, skew, increase sealed stability, but also can effectively prevent the venthole of valve body end cover from out of round.

Further, be equipped with the ring lock ring between second annular cell wall and the spheroid, the outer lane contact valve body's of lock ring inner wall and second annular cell wall go up along the terminal surface support lock ring, the interior circle of lock ring goes up along the terminal surface and supports the spheroid sphere, the deformation that the interior circle of spheroid sphere oppression sealing washer took place along the terminal surface simultaneously the sealing washer is in elastic limit.

The support ring plays a limiting role on the ball body, and prevents the ball body from excessively pressing the sealing ring for a long time, so that the sealing effect of the sealing ring is poor, and the service life is short.

Furthermore, a clamping ring is arranged on the inner ring of the support ring.

Furthermore, at least one end face of the sealing ring is provided with an annular clamping groove.

The inner ring of the support ring is provided with a circle of clamping ring extending out of the end face of the support ring, the radial end face of the sealing ring is provided with an annular clamping groove in the middle, and the clamping ring is inserted into the clamping groove in the assembling process. The rand is mutually supported with the draw-in groove, plays the effect of location installation, improves and equips efficiency.

Further, the height of the second annular groove wall is larger than that of the first annular groove wall. The heights of the first annular groove wall and the second annular groove wall are different, and an inclined plane is formed, so that the spherical arc spherical surface is adapted to the spherical arc spherical surface; on the other hand, the height of the second annular groove wall is at least equal to the height of the annular groove.

Further, the outer side edge of the end cover is provided with a step. Specifically, the outer side of the second annular groove wall corresponding to the end cover is provided with a circle of steps. The valve body is the plastics material, because there is gapped particular structure between the lateral wall of second annular cell wall and valve body, the cross-section between the lateral wall of second annular cell wall and valve body is the U type, however the degree of depth of U type should not be too dark, be the degree of depth of U type on same straight line with ring groove bottom portion relatively too dark, thereby lead to the thickness of second annular cell wall too thin (the left and right sides of second annular cell wall end thickness is unanimous), influence the injection molding drawing of patterns, when the mould level withdraws from, touch the second annular cell wall easily, take place the cracked phenomenon of second annular cell wall. The depth of the U shape is not too deep, and on the other hand, the distance from the bottom of the U shape to the end face of the end cover is obviously larger than the distance from the bottom of the circular groove to the end face of the end cover, namely, the left half part of the wall of the second circular groove is directly connected with the side wall of the valve body into a whole, so that the thickness of the outer edge of the end cover is relatively too large; therefore, a part of the outer edge of the end cover is removed to form a step, so that the distance from the bottom of the U-shaped groove to the end face of the end cover is equal to the distance from the bottom of the circular groove to the end face of the end cover, namely, the thickness of the end face of the end cover is kept relatively consistent, when an injection molding piece is cooled and molded, the phenomenon that the injection molding body is deformed due to the fact that the thickness of the injection molding body is inconsistent and the cooling deformation is inconsistent cannot occur, particularly the deformation of the second annular groove wall reduces the defective rate of.

Compared with the prior art, the utility model discloses following beneficial effect has: the assembled sealing ring does not need to be bonded by glue, so that the assembly efficiency of the ball valve is improved; the double-deck cell wall structure in ring groove, the sealing washer is direct contact valve body's lateral wall not, and the sealing washer can keep the complete installation of shape in the ring groove, does not receive the influence of lateral wall deformation, increases the sealed effect and the improvement stability of sealing washer.

Drawings

Fig. 1 is a schematic structural diagram of a gas meter ball valve.

Fig. 2 is a schematic structural view of the valve body.

Fig. 3 is a cross-sectional view B-B of fig. 2.

Fig. 4 is a partial sectional view of the ball valve for a gas meter after the completion of assembling each component.

Fig. 5 is an enlarged view of a in fig. 4.

In the figure: the valve comprises avalve body 1, a ball body 2, a connector 3, anend cover 4, anair outlet 5, amounting hole 6, a connecting structure 7, asealing ring 8, a first annular groove wall 9, a secondannular groove wall 10, an annular groove 11, asupport ring 12, aclamping ring 13, anannular clamping groove 14 and astep 15.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments, wherein the positional relationship described herein is consistent with the positional relationship of the drawings, and is for convenience of description only and does not limit the structure of the present invention.

Ball valve and valve body for the gas table, as shown in fig. 1 and 2, spheroid 2 is located thevalve body 1 of plastics material, the connector 3 that is used for with gas table air inlet interface connection is established to valve body one end,end cover 4 is established to the other end, be equipped withgas outlet 5 on the end cover, be equipped with valverod mounting hole 6 on the valve body lateral wall and around the valve rod mounting hole set up with the connection structure 7 of gear box, mounting hole and connection structure make the valve body circumferential surface of cylinder incomplete, make whole valve body cooling shrinkage deformation inconsistent, the lateral wall of valve body can appear warping, the lateral wall can extrude the sealing washer with lateral wall direct contact, and then influence sealed effect.

On the basis, a double-layer groove wall structure is provided, as shown in fig. 3, a first annular groove wall 9 and a secondannular groove wall 10 which take the axle center of the valve body as the center are arranged on the inner side of the end cover, and the height of the second annular groove wall is larger than that of the first annular groove wall, has a certain height drop and is suitable for the inclined plane of the ball body. The radius of the second annular groove wall is larger than that of the first annular groove wall, an annular groove 11 is formed between the first annular groove wall and the second annular groove wall, the second annular groove wall is closer to the side wall of the valve body, just as in fig. 3, the first annular groove wall is positioned at the inner side, the second annular groove wall is positioned at the outer side, and a gap is formed between the second annular groove wall and the side wall of the valve body.

As shown in fig. 4 and 5, asealing ring 8 is installed in the circular groove, two end faces of the sealing ring are both provided withcircular clamping grooves 14, and during assembly, a circular supportingring 12 located between the second circular groove wall and the ball body is needed. As shown in fig. 5, the upper edge end surface of the second annular groove wall abuts against the support ring, and the upper edge end surface of the inner ring of the support ring (the upper edge end surface of the inner ring of the support ring is an inclined surface) abuts against the spherical surface of the ball at the same time, and the spherical surface of the ball presses the upper left part of the seal ring (the upper left part of the seal ring has an unfilled corner in fig. 5), but the deformation of the seal ring is within the elastic limit. The spherical surface of the ball body is in point contact with the support ring and in line contact with the sealing ring. The support ring plays a limiting role on the ball body and prevents the ball body from excessively pressing the sealing ring. The inner ring of thesupport ring 12 is provided with aclamping ring 13, particularly, the support ring is provided with a groove capable of accommodating half thickness of the sealing ring (the height of the sealing ring from top to bottom in figure 5), the groove wall at the upper end extends to form the clamping ring and is inserted into anannular clamping groove 14 of the sealing ring, manual assembly is facilitated, and the installation is firm and stable.

The outer edge of the end cover is provided with astep 15. A gap is formed between the second annular groove wall and the side wall of the valve body, and the sectional view of the gap is U-shaped; the wall thickness of the lower end of the second annular groove wall is larger than that of the upper end, but if the depth of the gap is too deep, namely the U-shaped bottom extends downwards, so that the thicknesses of the upper end and the lower end of the second annular groove wall are equal, the second annular groove wall is thin as a whole, the second annular groove wall is positioned on the inner side of the valve body, and when the mold is demolded, the mold is horizontally withdrawn and easily touches the second annular groove wall to break. Therefore, the depth of the gap should not be too deep, and preferably, one half of the lower end of the second annular groove wall is directly connected with the side wall of the valve body into a whole, so that the thickness of the lower end of the second annular groove wall is larger than that of the upper end of the second annular groove wall. Thestep 15 is only required for the end cap since this arrangement results in the outer edge of the end cap being thicker than the inner edge. As shown in FIG. 5, a unfilled corner at the end face of the lower right corner of the valve body is astep 15, and due to the existence of the step, the thickness of the end cover is kept relatively consistent, so that the phenomenon that the injection molding piece deforms due to inconsistent cooling shrinkage time after the injection molding piece is demoulded is avoided.

The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by a person skilled in the art.

Claims (6)

1. The utility model provides a gas table ball valve's valve body and spheroid seal structure, the spheroid is located the valve body, valve body one end is established and is used for the connector of admitting air interface connection with gas table, and the end cover is established to the other end, is equipped with the gas outlet on the end cover, establishes the sealing washer between end cover and the spheroid, is equipped with the valve rod mounting hole on the valve body lateral wall and around the valve rod mounting hole setting with the connection structure of gear box, its characterized in that: the inner side of the end cover is provided with a first annular groove wall and a second annular groove wall which take the axle center of the valve body as the center, the radius of the second annular groove wall is larger than that of the first annular groove wall, an annular groove is formed between the first annular groove wall and the second annular groove wall, the sealing ring is arranged in the annular groove, and a gap is formed between the second annular groove wall and the side wall of the valve body.

2. The sealing structure of the valve body and the ball body of the ball valve for the gas meter according to claim 1, characterized in that: an annular supporting ring is arranged between the second annular groove wall and the ball body, the outer ring of the supporting ring is in contact with the inner wall of the valve body, the upper edge of the second annular groove wall abuts against the supporting ring along the end face, the inner ring of the supporting ring abuts against the spherical surface of the ball body along the end face, and the spherical surface of the ball body presses the upper edge of the inner ring of the sealing ring and meanwhile the deformation of the sealing ring is in an elastic limit.

3. The sealing structure of the valve body and the ball body of the ball valve of the gas meter according to claim 2, characterized in that: the inner ring of the support ring is provided with a clamping ring.

4. The sealing structure of the valve body and the ball body of the ball valve for the gas meter according to claim 1, characterized in that: and at least one end face of the sealing ring is provided with an annular clamping groove.

5. The sealing structure of the valve body and the ball body of the ball valve for the gas meter according to claim 1, characterized in that: the height of the second annular groove wall is larger than that of the first annular groove wall.

6. The sealing structure of the valve body and the ball body of the ball valve for the gas meter according to claim 1, characterized in that: the outer edge of the end cover is provided with a step.

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