CN210372110U

CN210372110U - Eccentric half ball valve

Info

Publication number: CN210372110U
Application number: CN201921272167.8U
Authority: CN
Inventors: 刘聪颖; 何春焕
Original assignee: Yuanda Vavle Group Co ltd
Current assignee: Yuanda Vavle Group Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-04-21
Anticipated expiration: 2029-08-07

Abstract

The utility model discloses an eccentric half ball valve, be provided with annular spherical crown on eccentric hemisphere of eccentric half ball valve, annular spherical crown includes a body coupling's fixed part and movable part, and the fixed part is connected through first connecting piece and eccentric hemisphere, and is gapped between movable part and the eccentric hemisphere, and the disk seat is inner to coincide with the movable part contact, and disk seat inner is equipped with vice seal ring with the movable part contact department of annular spherical crown, and the disk seat outer end passes through the second connecting piece and is connected with the valve body. The valve seat displacement is realized by adjusting the second connecting piece to reach the sealing specific pressure required by the sealing pair, the sealing is realized without depending on the pretightening force of the spring, the sealing reliability is improved, and the service life of the valve is prolonged. A gap is arranged between the movable part and the eccentric hemisphere, and the deformation of the movable part can realize the trace yielding amount. The situation that the sealing ratio between the sealing pairs is too large is avoided, the opening and closing of the product are more flexible, and the performance is more reliable. The sealing pair is soft and hard double sealing, and the sealing effect is good.

Description

Eccentric half ball valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to an eccentric half-ball valve.

Background

In recent years, the eccentric half ball valve is more and more widely applied, is suitable for occasions such as sewage treatment, paper pulp, alumina, urban heating and heat supply and is suitable for power plants, hydraulic slag removal or control of gaseous conveying pipelines. The existing eccentric half ball valve has the following problems:

1. the valve seat and the annular spherical crown on the valve body are sealed by a pair of sealing pairs, and the valve seat is jacked to be close to the sealing surface of the annular spherical crown by virtue of the pretightening force of the spring below the valve seat, so that sealing is realized. The defect is that the resilience force of the spring after being compressed by multiple times of stress is insufficient, the thrust to the valve seat is reduced, the displacement of the valve seat is also reduced, when the specific pressure of the valve seat and the annular spherical crown sealing pair is less than the necessary specific pressure, the valve leaks, and the service life of the valve is not ensured.

2. The annular spherical cap is a rigid structure, and the relative position and size requirements are strict. The defect is that when the sealing specific pressure of a sealing pair between the annular spherical crown and the valve seat is large, the unseating property can not be generated, so that the friction between the sealing pair is large, the sealing surface is easy to scratch, the opening and closing moment of a product is large, and the valve can not be opened when being opened without action for a long time.

3. The valve seat is only sealed with the stainless steel surface on the annular spherical crown by the rubber or polytetrafluoroethylene sealing gasket, the bearing capacity of the rubber and the polytetrafluoroethylene is limited, after the valve seat is subjected to large force for a long time, the resilience is poor, and after the medium pressure in the pipeline is reduced, the specific pressure of the sealing pair is reduced, the sealing is invalid, and the valve is leaked.

4. The rubber or teflon on the valve seat is pressed into the valve seat groove under the action of external force. The valve is in an open state, and after the valve is washed by a medium for a long time, rubber or polytetrafluoroethylene easily falls off from a valve seat groove, so that sealing failure is caused, and the valve leaks.

5. The lower valve shaft and the lower end cover are two split parts. The defect is that the strength of the lower end cover is low, and the product is easy to damage under the action of external force, thereby affecting the safety of the product.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an eccentric half-ball valve to above-mentioned prior art not enough.

In order to solve the above problems, the utility model adopts the following technical proposal:

an eccentric hemisphere valve comprises a valve body, a lower valve shaft rotatably arranged at the lower end of the valve body, a valve cover arranged at the upper end of the valve body, an upper valve shaft rotatably arranged on the valve cover, an eccentric hemisphere arranged in the valve body and a valve seat arranged at the outlet end of the valve body, wherein the lower valve shaft and the upper valve shaft are coaxially arranged, the lower valve shaft is connected with the lower end of the eccentric hemisphere, the upper valve shaft is connected with the upper end of the eccentric hemisphere, an annular spherical crown is arranged on the eccentric hemisphere, the annular spherical crown comprises a fixed part and a movable part which are integrally connected, the fixed part is connected with the eccentric hemisphere through a first connecting piece, a first O-shaped sealing ring is arranged at the joint of the fixed part and the eccentric hemisphere, a gap is reserved between the movable part and the eccentric hemisphere, and the inner end of the valve seat is in contact fit, an auxiliary sealing washer is arranged at the contact position of the inner end of the valve seat and the movable part of the annular spherical crown, the outer end of the valve seat is connected with the valve body through a second connecting piece, and a second O-shaped sealing ring is arranged at the connection position of the valve seat and the valve body.

According to a further technical scheme, the hydraulic control valve further comprises an actuating mechanism, the actuating mechanism is arranged on the valve cover, and the upper valve shaft extends out of the valve cover and then is connected with the actuating mechanism. In this embodiment, the actuator may be a manual worm gear or an automatic worm gear. The structure is the same as that of the existing semi-ball valve actuating mechanism.

The valve seat and the auxiliary sealing washer are manufactured into an integral structure in a vulcanization molding mode.

The valve body is provided with a first connecting piece, a second connecting piece and a third connecting piece.

According to a further technical scheme, the first connecting piece and the second connecting piece are both hexagon socket head cap screws.

According to a further technical scheme, the number of the second O-shaped sealing rings is two.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

1. the valve seat displacement is realized by adjusting the second connecting piece to reach the sealing specific pressure required by the sealing pair, the sealing is realized without depending on the pretightening force of the spring, the sealing reliability is improved, and the service life of the valve is prolonged.

2. Annular spherical crown includes fixed part and the movable part of body coupling, and gapped between movable part and the eccentric hemisphere can rely on the movable part to warp and realize the trace amount of giving back when leading to sealed vice sealed specific pressure great because of the machining precision deviation. The situation that the sealing ratio between the sealing pairs is too large is avoided, the opening and closing of the product are more flexible, and the performance is more reliable.

3. The sealing pair is soft and hard double sealing, namely the valve seat body is made of stainless steel, in addition, a convex rubber auxiliary sealing gasket is sealed with a stainless steel surface on the annular spherical crown, when the valve is closed, the auxiliary sealing gasket is firstly compressed, then the annular spherical crown and the valve seat are sealed, namely, main sealing is carried out, and the sealing effect is good.

4. The auxiliary sealing washer on the valve seat is vulcanized on the valve seat, so that the valve can be subjected to medium washing for a long time without glue falling, and the valve is more reliable in sealing.

5. The lower end cover is cancelled, and the lower valve shaft plays the effect of lower end cover simultaneously, stretches out to be connected with the valve body through the third connecting piece after the valve body, and intensity obviously promotes, can bear great external force, and factor of safety is higher.

Drawings

FIG. 1 is a schematic structural view of a hydraulic clamp according to the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a valve cover; 3. an eccentric hemisphere; 4. an annular spherical crown; 41. a fixed part; 42. a movable portion; 5. a valve seat; 6. an upper valve shaft; 7. an actuator; 8. a second O-ring seal; 9. a secondary sealing gasket; 10. a lower valve shaft; 11. a first O-ring seal; 12. a second connecting member; 13. a first connecting member; 14. and a third connecting member.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, an eccentric hemisphere valve includes a valve body 1, a lower valve shaft 10 rotatably disposed at a lower end of the valve body 1, a valve cap 2 disposed at an upper end of the valve body 1, an upper valve shaft 6 rotatably disposed on the valve cap 2, an eccentric hemisphere 3 disposed in the valve body 1, and a valve seat 5 disposed at an outlet end of the valve body 1, wherein the lower valve shaft 10 is coaxially disposed with the upper valve shaft 6, the lower valve shaft 10 extends out of the valve body 1 and is connected to the valve body 1 through a third connecting member 14, the lower valve shaft 10 is connected to a lower end of the eccentric hemisphere 3, the upper valve shaft 6 is connected to an upper end of the eccentric hemisphere 3, the eccentric hemisphere 3 is provided with an annular spherical cap 4, the annular spherical cap 4 includes a fixed portion 41 and a movable portion 42 which are integrally connected, the fixed portion 41 is connected to the eccentric hemisphere 3 through a, the connecting part of the fixed part 41 and the eccentric hemisphere 3 is provided with a first O-shaped sealing ring 11, a gap is reserved between the movable part 42 and the eccentric hemisphere 3, the inner end of the valve seat 5 is contacted and matched with the movable part 42 of the annular spherical crown 4, the contact part of the inner end of the valve seat 5 and the movable part 42 of the annular spherical crown 4 is provided with an auxiliary sealing washer 9, the valve seat 5 and the auxiliary sealing washer 9 are manufactured into an integral structure in a vulcanization molding mode, the outer end of the valve seat 5 is connected with the valve body 1 through a second connecting piece 12, the displacement of the valve seat 5 is achieved through adjusting the second connecting piece 12 to achieve sealing specific pressure required by sealing pair, and the connecting part of the valve seat 5 and the valve body 1 is provided with two second O-.

The valve rod mechanism further comprises an actuating mechanism 7, the actuating mechanism 7 is arranged on the valve cover 2, and the upper valve shaft 6 extends out of the valve cover 2 and then is connected with the actuating mechanism 7. In this embodiment, the actuator 7 may be a manual worm gear or an automatic worm gear. The structure is the same as that of the existing semi-ball valve actuating mechanism. The first connecting piece 13 and the second connecting piece 12 are both hexagon socket head cap screws.

The utility model discloses an actuating mechanism 7 drives the rotation of going up valve shaft 6, goes up valve shaft 6 and drives annular spherical crown 4 rotation, because has vice seal ring 9 on the disk seat 5, when the valve was closed, at first compressed vice seal ring 9, is sealed by annular spherical crown 4 and disk seat 5 again and is the main seal promptly.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An eccentric hemisphere valve which is characterized in that: comprises a valve body (1), a lower valve shaft (10) which is rotatably arranged at the lower end of the valve body (1), a valve cover (2) which is arranged at the upper end of the valve body (1), an upper valve shaft (6) which is rotatably arranged on the valve cover (2), an eccentric hemisphere (3) which is arranged in the valve body (1) and a valve seat (5) which is arranged at the outlet end of the valve body (1), wherein the lower valve shaft (10) is coaxially arranged with the upper valve shaft (6), the lower valve shaft (10) is connected with the lower end of the eccentric hemisphere (3), the upper valve shaft (6) is connected with the upper end of the eccentric hemisphere (3), an annular spherical crown (4) is arranged on the eccentric hemisphere (3), the annular spherical crown (4) comprises a fixed part (41) and a movable part (42) which are integrally connected, and the fixed part (41) is connected with the eccentric hemisphere (3) through a first connecting, the connection department of fixed part (41) and eccentric hemisphere (3) is equipped with first O shape sealing washer (11), it is gapped between movable part (42) and eccentric hemisphere (3), disk seat (5) inner coincide with movable part (42) contact of annular spherical crown (4), disk seat (5) inner and movable part (42) contact department of annular spherical crown (4) are equipped with vice seal ring (9), disk seat (5) outer end is connected with valve body (1) through second connecting piece (12), disk seat (5) and the junction of valve body (1) are equipped with second O shape sealing washer (8).

2. An eccentric hemispherical valve as in claim 1, wherein: the valve seat is characterized by further comprising an actuating mechanism (7), wherein the actuating mechanism (7) is arranged on the valve cover (2), and the upper valve shaft (6) extends out of the valve cover (2) and then is connected with the actuating mechanism (7).

3. An eccentric hemispherical valve as in claim 1, wherein: the valve seat (5) and the auxiliary sealing washer (9) are manufactured into an integral structure in a vulcanization molding mode.

4. An eccentric hemispherical valve as in claim 1, wherein: the lower valve shaft (10) extends out of the valve body (1) and then is connected with the valve body (1) through a third connecting piece (14).

5. An eccentric hemispherical valve as in claim 4 wherein: the first connecting piece (13), the second connecting piece (12) and the third connecting piece (14) are all hexagon socket head cap screws.

6. An eccentric hemispherical valve as in claim 1, wherein: the number of the second O-shaped sealing rings (8) is two.