CN220850832U

CN220850832U - Eccentric ball valve

Info

Publication number: CN220850832U
Application number: CN202322606578.9U
Authority: CN
Inventors: 黄东红; 郭恒刚; 袁海洲
Original assignee: Jiangsu Yichuang Semiconductor Technology Co ltd
Current assignee: Jiangsu Yichuang Semiconductor Technology Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-04-26
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses an eccentric ball valve, which comprises a valve cover, a valve body, a driving piece and an eccentric hemisphere, wherein the first sealing rubber backing ring is connected to an inlet or an outlet of the valve body, and the first sealing rubber backing ring is stably arranged at the inlet or the outlet by utilizing the cooperation of a protrusion and a groove; simultaneously, the outer end of the fixed ring on the eccentric hemisphere is provided with a conical surface, and the conical surface and the first sealing rubber backing ring realize sealing in the closed state of the eccentric ball valve; the fixed ring is arranged on the eccentric hemispheroids in a detachable manner, so that the eccentric hemispheroids can be conveniently replaced and maintained, the service life of the eccentric ball valve is prolonged, and meanwhile, only part of parts are replaced, so that the eccentric ball valve is more economical; the valve seat adopts an eccentric hemispherical form, the contact surface between the valve seat and the valve body is small, and the friction is less than that of a common ball valve; and the eccentric structure is adopted to facilitate the cleaning of the inside of the valve body, so that the valve body is prevented from being unable to be opened and closed due to scaling.

Description

Eccentric ball valve

Technical Field

The utility model relates to the technical field of valves, in particular to an eccentric ball valve.

Background

The ball valve is developed from a plug valve, the opening and closing member of the ball valve is a sphere, and the opening and closing of the valve can be realized by rotating the sphere by 90 degrees around the axis of the valve rod, so that the flow direction of a medium can be cut off, distributed and changed. Compared with a butterfly valve, the ball valve has the lowest flow resistance and good sealing performance, can be applied to corrosive media and low-boiling-point liquid, realizes quick opening and closing, can automatically position a spherical closing member at a boundary position, is isolated from the media by sealing surfaces of a ball body and a valve seat when the ball valve is fully opened and fully closed, has compact structure and light weight, is symmetrical in valve body, can bear stress from a pipeline and high pressure difference when the ball valve is closed, and has long service life.

For a common ball valve, the ball body and the valve seat are always in an extrusion state, the bearing stress is large, the abrasion is quick, and the ball valve is limited in temperature and pressure due to the use of sealing materials.

In addition, in areas with alkaline water and high hardness, the scaling phenomenon inside the valve is more serious. The scale is different from scaling in high-temperature boilers and other equipment, but is similar to a spherical crown and a valve seat which are attached to an eccentric half ball valve in a mineral crystallization way, so that the scale is strong in adhesive force, difficult to clean, and affects the sealing of a valve, so that the valve is blocked, the opening and closing torque of the valve is increased, and the valve cannot be opened and closed and has a functional failure when serious.

Disclosure of utility model

To overcome the above disadvantages, the present utility model aims to provide an eccentric ball valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an eccentric ball valve comprising a valve cover, a valve body, a driving member and an eccentric hemisphere, wherein: the top of the valve body is provided with an opening, an inlet and an outlet are respectively arranged along the axial direction of the valve body, the valve body comprises a valve cavity, and the eccentric hemispheroids are positioned in the valve cavity; the inlet or the outlet is provided with a bulge, the inlet or the outlet is connected with a first sealing rubber backing ring, the first sealing rubber backing ring is provided with a groove, and the bulge is matched with the groove; the sealing flange is arranged at the top opening, and the driving piece penetrates through the sealing flange and extends into the valve cavity; at least one eccentric hemisphere is connected with the driving piece and rotated by the driving piece, and the eccentric hemisphere can form a sealed closed state or an open state at the inlet or the outlet; the eccentric hemispheroids are provided with fixing rings, the fixing rings are fixed on the eccentric hemispheroids through bolts, the outer end faces of the fixing rings form conical surfaces, and when the valve is opened, the eccentric hemispheroids can be quickly separated from the valve body.

The first sealing rubber backing ring is stably arranged at the inlet or the outlet by utilizing the matching of the bulge and the groove; simultaneously, the outer end of the fixed ring on the eccentric hemisphere is provided with a conical surface, and the conical surface and the first sealing rubber backing ring realize sealing in the closed state of the eccentric ball valve; the fixed ring is arranged on the eccentric hemispheroids in a detachable manner, so that the eccentric hemispheroids can be conveniently replaced and maintained, the service life of the eccentric ball valve is prolonged, and meanwhile, only part of parts are replaced, so that the eccentric ball valve is more economical; the valve seat adopts an eccentric hemispherical form, the contact surface between the valve seat and the valve body is small, and the friction is less than that of a common ball valve; the eccentric structure is adopted to facilitate the cleaning of the inside of the valve body, so that the valve body is prevented from being unable to be opened and closed due to scaling.

Still further, the driving piece includes upper valve rod and lower valve rod, the upper valve rod with eccentric hemisphere body is connected, lower valve rod one end is connected with the valve body, the other end with eccentric hemisphere body swing joint, eccentric hemisphere rotates between upper valve rod and lower valve rod, can improve pivoted stability.

Further, the upper valve rod, the lower valve rod and the eccentric hemispheroids are connected through screws.

Still further, be equipped with the elastic sealing circle on the terminal surface that import or export go up with first sealing rubber backing ring contact, can make eccentric hemisphere with import or export closely laminate, the elastic sealing circle receives the extrusion of solid fixed ring and first sealing rubber backing ring, is compressed state, can improve sealed effect.

Furthermore, the eccentric hemispheroids are arranged in two parts, and the two parts of the eccentric hemispheroids are axially arranged along the valve body, so that the inlet and the outlet can be sealed or opened simultaneously, and the bidirectional sealing can be realized, thereby improving the sealing effect of the eccentric ball valve.

Still further, the arch includes first arch and second arch, the recess includes first recess and second recess, first protruding embedding is in the first recess, the second protruding embedding is in the second recess, utilizes protruding cooperation with the recess for first sealing rubber backing ring establishes in import or exit steadily, avoids leading to the dislocation of first sealing rubber backing ring because of frequent friction.

Further, a second sealing rubber grommet is arranged between the valve body and the valve cover.

Still further, the driving piece still includes the hand wheel that upper valve rod top is connected, the hand wheel passes through the bolt fastening upper valve rod is last.

The beneficial effects of the utility model are as follows: 1. the first sealing rubber backing ring is connected with the inlet or the outlet of the valve body, and the first sealing rubber backing ring is stably arranged at the inlet or the outlet by utilizing the matching of the protrusion and the groove;

2. simultaneously, the outer end of the fixed ring on the eccentric hemisphere is provided with a conical surface, and the conical surface and the first sealing rubber backing ring realize sealing in the closed state of the eccentric ball valve;

3. the fixed ring is arranged on the eccentric hemispheroids in a detachable manner, so that the eccentric hemispheroids can be conveniently replaced and maintained, the service life of the eccentric ball valve is prolonged, and meanwhile, only part of parts are replaced, so that the eccentric ball valve is more economical;

4. the valve seat adopts an eccentric hemispherical form, the contact surface between the valve seat and the valve body is small, and the friction is less than that of a common ball valve; and the eccentric structure is adopted to facilitate the cleaning of the inside of the valve body, so that the valve body is prevented from being unable to be opened and closed due to scaling.

Drawings

FIG. 1 is a schematic view of an eccentric ball valve according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a valve body according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an embodiment of the present utility model;

FIG. 4 is a schematic illustration of an eccentric hemisphere of an embodiment of the present utility model coupled to a driving member;

FIG. 5 is a schematic illustration of an eccentric hemisphere of an embodiment of the present utility model in two pieces;

FIG. 6 is a schematic view of a first gasket coupled to a valve body according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a first protrusion and a second protrusion on a valve body according to an embodiment of the present utility model;

Fig. 8 is a schematic view of a first sealing rubber pad according to an embodiment of the utility model.

In the figure: 1. a valve cover; 2. a valve body; 201. a top opening; 202. an inlet; 2021. a first protrusion; 2022. a second protrusion; 203. an outlet; 204. a valve cavity; 3. a driving member; 301. an upper valve rod; 302. a lower valve rod; 4. eccentric hemispheres; 5. a sealing flange; 6. a fixing ring; 601. a conical surface; 7. a first sealing rubber pad; 701. a first groove; 702. a second groove; 8. a second sealing rubber grommet; 9. and a hand wheel.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1 to 3, an eccentric ball valve in this embodiment includes a valve cover 1, a valve body 2, a driving member 3, and an eccentric hemisphere 4, wherein: the top opening 201 of the valve body 2 is provided with an inlet 202 and an outlet 203 along the axial direction of the valve body 2, the valve body 2 comprises a valve cavity 204, and the eccentric hemispheroids 4 are positioned in the valve cavity 204; the inlet 202 or the outlet 203 is provided with a protrusion, the inlet 202 or the outlet 203 is connected with a first sealing rubber pad 7 ring, the first sealing rubber pad 7 ring is provided with a groove, and the protrusion is matched with the groove; a sealing flange 5 is installed at the top opening 201, and the driving piece 3 is arranged through the sealing flange 5 and extends into the valve cavity 204; at least one eccentric hemisphere 4, said eccentric hemisphere 4 being connected to said driving member 3 and rotated by said driving member 3, said eccentric hemisphere 4 being capable of forming a sealed closed or open state at said inlet 202 or outlet 203; the eccentric hemispheroids 4 are provided with fixing rings 6, the fixing rings 6 are fixed on the eccentric hemispheroids 4 through bolts, the outer end surfaces of the fixing rings 6 form conical surfaces 601, and when the valve is opened, the eccentric hemispheroids 4 can be quickly separated from the valve body 2.

By connecting the ring of the first sealing rubber pad 7 at the inlet 202 or the outlet 203 of the valve body 2 and utilizing the cooperation of the protrusion and the groove, the ring of the first sealing rubber pad 7 is stably arranged at the inlet 202 or the outlet 203; simultaneously, the outer end of the fixed ring 6 on the eccentric hemisphere 4 is provided with a conical surface 601, and the conical surface 601 and the first sealing rubber pad 7 are sealed in a closed state of the eccentric ball valve; the fixed ring 6 is arranged on the eccentric hemispheroids 4 in a detachable manner, so that the eccentric ball valve can be conveniently replaced and maintained, the service life of the eccentric ball valve is prolonged, and meanwhile, only part of parts are replaced, so that the eccentric ball valve is more economical; the valve seat adopts an eccentric hemispherical form, the contact surface between the valve seat and the valve body 2 is small, and the friction is less than that of a common ball valve; and adopt eccentric structure to do benefit to the clearance inside valve body 2, avoid valve body 2 to be unable to open and close because of the scale deposit.

Referring to fig. 4, in some embodiments, the driving member 3 includes an upper valve rod 301 and a lower valve rod 302, wherein the upper valve rod 301 is connected to the eccentric hemisphere 4, and one end of the lower valve rod 302 is connected to the valve body 2, and the other end is movably connected to the eccentric hemisphere 4. In normal operation of the eccentric ball valve, the upper valve rod 301 rotates with the eccentric hemisphere 4, and the lower part of the eccentric hemisphere 4 rotates relative to the lower valve body 2.

Referring to fig. 4, in some embodiments, the upper valve rod 301 is connected with the eccentric hemisphere 4 through a screw, the lower valve rod 302 is connected with the eccentric hemisphere 4 through a screw, and the eccentric hemisphere 4 rotates between the upper valve rod 301 and the lower valve rod 302, so that the stability of rotation can be improved, and the lower part of the eccentric hemisphere 4 is prevented from being distorted in the rotation process, thereby influencing the airtight effect.

Referring to fig. 5, in some embodiments, the eccentric hemisphere 4 is two pieces, and the two eccentric hemispheres 4 are disposed along the axial direction of the valve body 2, so that the inlet 202 and the outlet 203 can be sealed or opened simultaneously. The symmetrical two eccentric hemispheres 4 are arranged, so that the inlet 202 and the outlet 203 can be sealed at the same time, and bidirectional sealing can be realized, thereby improving the sealing effect of the eccentric ball valve; or when one of the eccentric hemispheres 4 fails, the other is also able to effect closure of the ball valve. Instead of being provided in two pieces, it may be provided in three pieces, four pieces, or the like.

Referring to fig. 6, in some embodiments, an elastic sealing ring is provided on the end surface of the inlet 202 or the outlet 203 contacting with the ring of the first sealing rubber pad 7, so that the eccentric hemisphere 4 can be tightly fitted to the inlet 202 or the outlet 203. When the eccentric ball valve is in a valve closing state, the elastic sealing ring is extruded by the fixed ring 6 and the first sealing rubber pad 7 to be in a compression state, so that the sealing effect can be improved.

Referring to fig. 7, in some embodiments, the protrusions include a first protrusion 2021 and a second protrusion 2022, the grooves include a first groove 701 and a second groove 702, the first protrusion 2021 is embedded in the first groove 701, and the second protrusion 2022 is embedded in the second groove 702. By utilizing the matching of the protrusions and the grooves, the first sealing rubber gasket 7 ring is stably arranged at the inlet 202 or the outlet 203, so that dislocation of the first sealing rubber gasket 7 ring caused by frequent friction is avoided, and the sealing effect of the eccentric ball valve is affected.

Referring to fig. 8, in some embodiments, a second gasket 8 is provided between the valve body 2 and the valve cover 1. The eccentric hemispheroids 4 are made of alloy materials, and the alloy materials are corrosion-resistant and have high structural strength, so that the service life of the eccentric hemispheroids 4 can be prolonged; the valve body 2 is made of No. 45 steel, and is wide in source, convenient to cast and mold, convenient to manufacture and low in cost. The fixing ring 6 is made of soft sealing material polytetrafluoroethylene, and the polytetrafluoroethylene has good physical and chemical properties and low leakage rate.

Referring to fig. 1, in some embodiments, the driving member 3 further includes a hand wheel 9 connected to a top end of the upper valve rod 301, and the hand wheel 9 is fixed to the upper valve rod 301 by a bolt.

The working principle of the utility model is as follows: firstly, in the valve opening process, the hand wheel 9 is rotated anticlockwise to drive the eccentric hemispheroid 4 to rotate anticlockwise, at this time, the upper valve rod 301 rotates along with the eccentric hemispheroid 4, and the lower part of the eccentric hemispheroid 4 rotates relative to the lower valve body 2, so that the conical surface 601 at the outer end of the fixed ring 6 is separated from the ring of the first sealing rubber pad 7, and along with the continuous rotation of the eccentric hemispheroid 4, the inlet 202 and the outlet 203 on the valve body 2 are gradually communicated until the upper valve rod 301 rotates by 90 degrees, the eccentric hemispheroid 4 at this time is completely deviated from the inlet 202 or the outlet 203, and the eccentric ball valve is completely opened.

And then, in the valve closing process, the hand wheel 9 is rotated clockwise to drive the eccentric hemispheroids 4 to rotate clockwise contrary to the valve opening process, so that the conical surface 601 at the outer end of the fixed ring 6 contacts with the ring of the first sealing rubber pad 7, and as the eccentric hemispheroids 4 continue to rotate, the inlet 202 and the outlet 203 on the valve body 2 are gradually closed until the upper valve rod 301 rotates by 90 degrees, and the eccentric hemispheroids 4 at the moment completely coincide with the inlet 202 or the outlet 203, so that the eccentric ball valve realizes complete valve closing.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. An eccentric ball valve, characterized by including valve gap, valve body, driving piece and eccentric hemisphere, wherein:

The top of the valve body is provided with an opening, an inlet and an outlet are respectively arranged along the axial direction of the valve body, the valve body comprises a valve cavity, and the eccentric hemispheroids are positioned in the valve cavity;

the inlet or the outlet is provided with a bulge, the inlet or the outlet is connected with a first sealing rubber backing ring, the first sealing rubber backing ring is provided with a groove, and the bulge is matched with the groove;

The sealing flange is arranged at the top opening, and the driving piece penetrates through the sealing flange and extends into the valve cavity;

At least one eccentric hemisphere is connected with the driving piece and rotated by the driving piece, and the eccentric hemisphere can form a sealed closed state or an open state at the inlet or the outlet;

The eccentric hemispheroids are provided with fixing rings, the fixing rings are fixed on the eccentric hemispheroids through bolts, the outer end faces of the fixing rings form conical surfaces, and when the valve is opened, the eccentric hemispheroids can be quickly separated from the valve body.

2. The eccentric ball valve of claim 1, wherein the driving member comprises an upper valve rod and a lower valve rod, the upper valve rod is connected with the eccentric hemisphere, one end of the lower valve rod is connected with the valve body, and the other end of the lower valve rod is movably connected with the eccentric hemisphere.

3. The eccentric ball valve of claim 2, wherein the upper valve rod is connected with the eccentric hemisphere by screw threads, and the lower valve rod is connected with the eccentric hemisphere by screw rods.

4. The eccentric ball valve of claim 1, wherein an elastic sealing ring is provided on the end surface of the inlet or the outlet contacting the first sealing rubber backing ring, so that the eccentric hemisphere can be tightly attached to the inlet or the outlet.

5. The eccentric ball valve of claim 1, wherein the eccentric hemisphere is two pieces, and the two pieces of eccentric hemispheres are arranged along the axial direction of the valve body, so that the inlet and the outlet can be sealed or opened simultaneously.

6. The eccentric ball valve of claim 1, wherein the protrusion comprises a first protrusion and a second protrusion, the groove comprises a first groove and a second groove, the first protrusion is embedded in the first groove, and the second protrusion is embedded in the second groove.

7. The eccentric ball valve of claim 1, wherein a second sealing rubber grommet is provided between the valve body and the valve cover.

8. The eccentric ball valve of claim 2, wherein the driving member further comprises a hand wheel connected to the top end of the upper valve stem, the hand wheel being fixed to the upper valve stem by a bolt.