CN219954290U

CN219954290U - Flange type sealing ball valve

Info

Publication number: CN219954290U
Application number: CN202321127058.3U
Authority: CN
Inventors: 孔德新; 伍春艳
Original assignee: Weilong Valve Co ltd
Current assignee: Weilong Valve Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-11-03
Anticipated expiration: 2033-05-11

Abstract

The utility model relates to the technical field of ball valves, in particular to a flange type sealing ball valve, which comprises: the ball valve comprises a ball body, a side valve cover and a ball crown, wherein the ball crown is arranged between the ball body and the side valve cover, and the ball crown is in interference fit with the side valve cover; the spherical crown is arranged on the sphere, an O-shaped ring is arranged on the radial matching surface of the spherical crown and the sphere, an adjusting screw is arranged on the spherical crown, the adjusting screw penetrates through the spherical crown, and one end of the adjusting screw abuts against the sphere. The ball valve solves the problem of water leakage caused by abrasion after the flange type ball valve is used for a period of time.

Description

Flange type sealing ball valve

Technical Field

The utility model relates to the technical field of ball valves, in particular to a flange type sealing ball valve.

Background

The disclosure of this background section is only intended to increase the understanding of the general background of the utility model and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.

Ball valves in the current market are various in variety, and products thereof are widely used in the fields of municipal water supply and drainage, heating and water supply and the like. The structure of the ball valve is mainly divided into two pieces and three pieces, and the ball valve is in threaded connection, socket welding connection and flange connection, and the flange connection structure mainly comprises two pieces of split type, integral side-mounting type, fixed type, floating type and the like.

The existing flange type metal sealing ball valve comprises a ball body and a side valve cover, wherein the ball body and the side valve cover are sealed through a ball crown, and the ball crown and the side valve cover are in interference fit to achieve a sealing effect. Because the spherical crown and the side valve cover are rotated relatively frequently in the use process, the spherical crown and the side valve cover are worn after long-term use, so that the problem of water leakage is generated.

Disclosure of Invention

Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide a flange type sealing ball valve so as to solve the problem of water leakage caused by abrasion after the flange type sealing ball valve is used for a period of time.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

a flanged seal ball valve, comprising: the ball valve comprises a ball body, a side valve cover and a ball crown, wherein the ball crown is arranged between the ball body and the side valve cover, and the ball crown is in interference fit with the side valve cover; the spherical crown is arranged on the sphere, an O-shaped ring is arranged on the radial matching surface of the spherical crown and the sphere, an adjusting screw is arranged on the spherical crown, the adjusting screw penetrates through the spherical crown, and one end of the adjusting screw abuts against the sphere.

Preferably, the side surface of the sphere is provided with a round table, the root of the round table is provided with a step surface, the center of the spherical crown is provided with a round hole, and the round hole of the spherical crown is matched with the round table of the sphere and is provided with an O-shaped ring; the adjusting screw is parallel to the central shaft of the round table, and one end of the adjusting screw abuts against the step surface.

Preferably, the spherical crown is mounted on the sphere through a fastening bolt, and a sealing gasket is arranged between the end face of the spherical crown and the step face of the sphere.

Preferably, the fastening bolts and the adjusting screws are alternately arranged on the circumference of the spherical cap.

Preferably, the mating surface of the spherical crown and the side valve cover is an arc surface, and the side valve cover is provided with a sealing part which is matched with the spherical crown.

Preferably, the spherical crown is austenitic stainless steel, and the sealing part of the spherical crown is pure nickel.

Preferably, the valve further comprises a valve body, wherein the side valve caps are arranged on two sides of the valve body, the valve body is detachably connected with the side valve caps on two sides, a valve rod is arranged on the valve body, and the valve rod penetrates through the valve body and is connected with the ball body.

Preferably, a jack is arranged at the position of the ball body facing the valve rod, and the lower end of the valve rod is inserted into the jack of the ball body.

Preferably, the jack is a kidney-shaped hole or a polygonal hole, and the shape of the lower end of the valve rod is matched with that of the jack.

Preferably, the sphere is a single-sided seal or a double-sided seal.

One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:

according to the utility model, the adjusting screw is arranged on the spherical crown, so that the spherical crown and the side valve cover are always in interference fit by increasing the distance between the spherical crown and the spherical crown after the spherical crown is used for a period of time, and water leakage at the spherical crown and the side valve cover is avoided. Meanwhile, by arranging the O-shaped ring on the radial matching surface of the spherical crown and the sphere, water leakage caused by matching between the spherical crown and the sphere due to adjusting the position of the spherical crown is avoided. Therefore, through the cooperation of the adjusting screw and the O-shaped ring, the problem of water leakage caused by abrasion of the sealing pair of the ball valve is solved, and compared with a repeated build-up welding mode, the repairing and maintenance cost is saved.

Additional aspects of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of a prior art ball valve;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic view of a ball valve according to an embodiment of the present utility model;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view of FIG. 3 at C;

FIG. 6 is a schematic cross-sectional view of a receptacle provided by an embodiment of the present utility model;

in the figure: 1. a valve body; 2. a sphere; 3. a side valve cover; 4. a spherical cap; 5. a fastening bolt; 6. a sealing gasket; 7. an O-ring; 8. an adjusting screw; 9. a jack;

the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the utility model clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

For convenience of description, the words "left" and "right" appearing in the present utility model merely denote left and right directions consistent with the drawings themselves, and are not limiting in structure, merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. The terms "mounted," "connected," "secured," and the like in the present utility model are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the terms "mechanically coupled" and "directly coupled" may be used interchangeably to refer to either a mechanical coupling, an indirect coupling via an intermediary, an internal coupling of two elements, or an interaction of two elements, as would be understood by one of ordinary skill in the art, and the terms are to be understood in the specific sense of the present utility model as appropriate.

As shown in fig. 1 and 2, the existing ball valve structure comprises a valve body, a side valve cover, a ball body and a ball crown, wherein the ball crown is arranged on the side surface of the ball body through a fastening bolt, and a rubber pad is arranged between the ball crown and the ball body to realize sealing at the position. The outer side of the spherical crown is provided with an inclined plane which is in interference fit with the side valve cover to realize the sealing at the position. Because the spherical crown and the side valve cover are rotated relatively frequently in the use process, a gap is generated between the spherical crown and the side valve cover under long-term abrasion, so that the problem of water leakage is solved, and if the ball valve is adjusted towards the side valve cover, the gap between the spherical crown and the ball body is larger than the thickness of the rubber pad, so that water leakage is caused at the gap.

As shown in fig. 3-6, in one embodiment of the present utility model, a flange type sealing ball valve is provided, which includes: the ball valve comprises a ball 2, a side valve cover 3 and a ball crown 4, wherein the ball crown 4 is arranged between the ball 2 and the side valve cover 3, and the ball crown 4 is in interference fit with the side valve cover 3; the spherical crown 4 is arranged on the sphere 2, an O-shaped ring 7 is arranged on the radial matching surface of the spherical crown 4 and the sphere 2, an adjusting screw 8 is arranged on the spherical crown 4, the adjusting screw 8 penetrates through the spherical crown 4, and one end of the adjusting screw 8 abuts against the sphere 2.

And the adjusting screw 8 is added for adjusting the interference clearance between the spherical crown 4 and the sealing surface of the side valve cover 3, and the clearance is adjusted through the adjusting screw 8, so that the maintenance cost is saved. The ball body 2 is added with a radial O-shaped ring, so that the sealing failure of the sealing gasket 6 after the adjustment of the ball crown 4 is prevented, the sealing of the O-shaped ring 7 is enhanced, and the sealing reliability is improved.

As shown in fig. 4, the side surface of the ball body 2 is provided with a round table, the root of the round table is provided with a step surface, the center of the ball crown 4 is provided with a round hole, and the round hole of the ball crown 4 is matched with the round table of the ball body 2 and is provided with an O-ring 7; the adjusting screw 8 is parallel to the central shaft of the round table, and one end of the adjusting screw 8 abuts against the step surface. After the spherical crown 4 or the side valve cover 3 is worn, the spherical crown 4 is far away from the sphere 2 by rotating the adjusting screw 8, so that the sealing fit between the spherical crown 4 and the side valve cover 3 is ensured.

The spherical crown 4 is mounted on the sphere 2 through a fastening bolt 5, and a sealing gasket 6 is arranged between the end face of the spherical crown 4 and the step face of the sphere 2. The O-shaped ring 7 and the sealing gasket 6 are independently installed, the ball body 2 and the ball crown 4 are installed by the fastening bolt 5, and the clearance is adjusted by the adjusting screw 8, so that the maintenance cost is saved.

As shown in fig. 5, the fastening bolts 5 and the adjusting screws 8 are alternately arranged on the circumference of the spherical cap 4. For example, 3 fastening bolts 5 and 3 adjusting screws 8 are provided on the same circumference, and 3 fastening bolts 5 and 3 adjusting screws 8 are alternately arranged at intervals. By the alternate arrangement, it is more convenient to adjust the spherical cap 4 while preventing tilting from occurring when adjusting the spherical cap 4.

As shown in fig. 4, the mating surface of the spherical cap 4 and the side valve cover 3 is an arc surface, and the side valve cover 3 has a sealing portion that mates with the spherical cap 4. Because the spherical crown 4 is in interference fit with the sealing surface of the side valve cover 3, the opening and closing torque is large.

Based on this, in this embodiment, the spherical cap 4 is made of austenitic stainless steel, and the sealing portion of the spherical cap 4 is made of pure nickel. Namely, the sealing part of the side valve cover 3 is processed after surfacing pure nickel, so that the sealing surface is more wear-resistant and smooth, and the torque during opening or closing is reduced.

As shown in fig. 3, the flange type sealing ball valve further comprises a valve body 1, wherein the side valve caps 3 are arranged on two sides of the valve body 1, the valve body 1 is detachably connected with the side valve caps 3 on two sides, a valve rod is arranged on the valve body 1, and the valve rod penetrates through the valve body 1 and is connected with the ball body 2. The valve body 1, the side valve cover 3, the sphere 2 and the like are made of spheroidal graphite cast iron, so that the valve is convenient to manufacture and good in strength. The valve rod is made of martensitic stainless steel, and has high strength, high shearing strength and simple production and processing.

As shown in fig. 1, in the prior art, a valve rod is connected with a ball body 2 by a pin, the connection strength is poor, the shearing strength requirement of the pin is high, and the valve rod is not well drilled, especially a large-size pin hole is not well processed.

Based on this, as shown in fig. 3, the ball 2 is provided with a socket 9 toward the valve stem in this embodiment, and the lower end of the valve stem is inserted into the socket 9 of the ball 2. The insertion holes 9 may be kidney-shaped holes, rectangular holes, polygonal holes, and other insertion holes 9 of regular or irregular shape. In this embodiment, as shown in fig. 6, the cross section of the insertion hole 9 is a kidney-shaped hole or a rectangular hole, and the shape of the lower end of the valve rod is matched with that of the insertion hole 9.

In the embodiment, the valve rod is connected with the ball body 2 in a mode of canceling pin connection, the head of the valve rod is adopted to be milled flat or square, and the valve rod is directly inserted into the center of the ball body 2, so that the valve rod is firm in positioning, large in transmission torque, high in shearing strength, more reliable in transmission and high in torque transmission efficiency.

The ball valve can be rotated by 90 degrees according to the set requirement by externally connecting a driving head or a hand wheel, so that the ball valve can be opened to enable media to flow, the ball valve can be sealed on one side or two sides, namely, two spherical crowns 4 are respectively arranged on two sides of a sphere 2, and the ball valve can be customized according to the requirement.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims

1. A flanged seal ball valve, comprising: the ball valve comprises a ball body, a side valve cover and a ball crown, wherein the ball crown is arranged between the ball body and the side valve cover, and the ball crown is in interference fit with the side valve cover;

the spherical crown is arranged on the sphere, an O-shaped ring is arranged on the radial matching surface of the spherical crown and the sphere, an adjusting screw is arranged on the spherical crown, the adjusting screw penetrates through the spherical crown, and one end of the adjusting screw abuts against the sphere.

2. The flange type sealing ball valve according to claim 1, wherein a round table is arranged on the side face of the sphere, a step surface is arranged at the root of the round table, a round hole is arranged in the center of the spherical crown, and the round hole of the spherical crown is matched with the round table of the sphere and is provided with an O-shaped ring; the adjusting screw is parallel to the central shaft of the round table, and one end of the adjusting screw abuts against the step surface.

3. The flange-type sealing ball valve according to claim 2, wherein the spherical cap is mounted on the ball body by a fastening bolt, and a gasket is provided between an end surface of the spherical cap and a stepped surface of the ball body.

4. A flanged seal ball valve as claimed in claim 3 wherein said tightening bolts alternate with adjusting screws on the circumference of the spherical cap.

5. The flanged seal ball valve of claim 1, wherein the mating surface of the crown and the side valve cover is an arcuate surface, the side valve cover having a seal portion that mates with the crown.

6. The flanged seal ball valve of claim 5, wherein the spherical cap is austenitic stainless steel and the sealing portion of the spherical cap is pure nickel.

7. The flanged seal ball valve of claim 1, further comprising a valve body having said side valve caps on both sides of said valve body, said valve body being removably connected to said side valve caps on both sides, said valve body having a valve stem disposed thereon, said valve stem extending through said valve body and being connected to said ball.

8. The flanged seal ball valve of claim 7, wherein the ball is provided with a socket toward the valve stem, and the lower end of the valve stem is inserted into the socket of the ball.

9. The flanged seal ball valve of claim 8, wherein the socket is a kidney-shaped or polygonal-shaped hole, and the lower end of the valve stem is shaped to match the shape of the socket.

10. The flange-type sealing ball valve according to claim 1, wherein the ball is a single-sided seal or a double-sided seal.