阅读说明：本技术 一种带有弹性中心孔的球阀工作密封组件 (Ball valve working sealing assembly with elastic center hole ) 是由 张飞 丁光 付强 张翼 王义丹 陈宇加 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种带有弹性中心孔的球阀工作密封组件,包括与球阀阀体活动连接的活动密封环(1)和固定在球阀活门上的固定密封环(2),所述活动密封环(1)的内部设有环状贯通的第一中心孔(11),所述固定密封环(2)的内部设有环状贯通的第二中心孔(21)；所述第一中心孔(11)和第二中心孔(21)在过活动密封环(1)中心轴线的截面上形成有两个圆,两圆的圆心连线经过活动密封环(1)和固定密封环(2)的接触部位。本发明具有密封性能好、使用寿命长的优点。(The invention discloses a ball valve working seal assembly with an elastic center hole, which comprises a movable seal ring (1) movably connected with a ball valve body and a fixed seal ring (2) fixed on a ball valve, wherein a first center hole (11) which is annularly communicated is formed in the movable seal ring (1), and a second center hole (21) which is annularly communicated is formed in the fixed seal ring (2); the first center hole (11) and the second center hole (21) are formed with two circles on the section passing through the central axis of the movable sealing ring (1), and the line of the centers of the two circles passes through the contact part of the movable sealing ring (1) and the fixed sealing ring (2). The invention has the advantages of good sealing performance and long service life.)

1. The utility model provides a ball valve work seal assembly with elasticity centre bore, includes with ball valve body swing joint's movable sealing ring (1) and fix fixed sealing ring (2) on the ball valve, its characterized in that: a first central hole (11) which is annularly communicated is formed in the movable sealing ring (1), and a second central hole (21) which is annularly communicated is formed in the fixed sealing ring (2); the first center hole (11) and the second center hole (21) are formed with two circles on the section passing through the central axis of the movable sealing ring (1), and the line of the centers of the two circles passes through the contact part of the movable sealing ring (1) and the fixed sealing ring (2).

2. A ball valve working seal assembly with a resilient central bore according to claim 1 wherein: the outer side surface of the movable sealing ring (1) connected with the ball valve body is provided with a plurality of annular grooves, and sealing rings (12) are arranged in the annular grooves.

3. A ball valve working seal assembly with a resilient central bore according to claim 2 wherein: the cross section of the sealing ring (12) is T-shaped, and the width of the part of the sealing ring (12) exposed outside the ring groove is 2-3 times of the width of the ring groove.

4. A ball valve working seal assembly with a resilient central bore according to claim 1 wherein: the aperture of the first center hole (11) is larger than that of the second center hole (21).

5. A ball valve working seal assembly with a resilient central bore according to claim 1 wherein: the movable sealing ring (1) and the fixed sealing ring (2) are coaxially arranged.

6. A ball valve working seal assembly with a resilient central bore according to claim 1 wherein: the contact part of the movable sealing ring (1) and the fixed sealing ring (2) on the movable sealing ring (1) is a curved surface.

7. A ball valve working seal assembly with a resilient central bore according to claim 1 wherein: the contact part of the movable sealing ring (1) on the fixed sealing ring (2) and the fixed sealing ring (2) is a plane.

Technical Field

The invention relates to a ball valve sealing element, in particular to a ball valve working sealing assembly with an elastic center hole.

Background

The water inlet ball valve is widely applied to high-head hydropower stations with the hydrostatic heads larger than 250m, and is particularly suitable for occasions with high flow speed because the valve is cylindrical, the inner diameter of the valve is the same as the diameter of a steel pipe, and the hydraulic loss is close to zero during overflowing. The modern ball valve is generally arranged by adopting a horizontal shaft and mainly comprises a valve shell, a valve, a shaft end, a sealing assembly, an operating mechanism and the like, wherein the valve is a rotary sphere, the water is retained by the sphere when the water channel is closed, the valve is opened after rotating for 90 degrees, water flows through a cylindrical hole with the center of the sphere consistent with the diameter of the water channel, no water-retaining member is arranged, and the head loss is small. Divide into single face seal ball valve and double-sided seal ball valve according to the difference of sealed form, it is many now with double-sided seal ball valve, establish the maintenance seal at the entrance point of the upper reaches promptly, the work seal is established to the low reaches exit end, it all needs to use seal assembly to overhaul sealed and work seal, seal assembly be one with ball valve body sliding connection's movable sealing ring and a fixed sealing ring of fixing on the ball valve, movable sealing ring compression fastening fixed sealing ring forms sealedly, movable sealing ring keeps away from fixed sealing ring and withdraws from sealedly. The main problems existing in the prior sealing assembly are that in the actual processing and manufacturing process, the contact matching degree of a movable sealing ring and a fixed sealing ring of the ball valve is changed due to the fact that the processing precision of the ball valve shaft is often insufficient, the material deforms under the action of pressure water and the like, and the local stress is uneven, so that the water leakage phenomenon is caused, the sealing performance is influenced, and the service life is short. Therefore, the existing ball valve sealing element has the problems of poor sealing performance and short service life.

Disclosure of Invention

The invention aims to provide a ball valve working sealing assembly with an elastic center hole. It has the advantages of good sealing performance and long service life.

The technical scheme of the invention is as follows: a ball valve working seal assembly with an elastic center hole comprises a movable seal ring movably connected with a ball valve body and a fixed seal ring fixed on a ball valve, wherein a first center hole which is annularly communicated is formed in the movable seal ring, and a second center hole which is annularly communicated is formed in the fixed seal ring; the first central hole and the second central hole are provided with two circles on the section passing through the central axis of the movable sealing ring, and the line of the centers of the two circles passes through the contact part of the movable sealing ring and the fixed sealing ring.

In the ball valve working seal assembly with the elastic center hole, a plurality of annular grooves are formed in the outer side surface, connected with the ball valve body, of the movable seal ring, and seal rings are arranged in the annular grooves.

In the above ball valve working seal assembly with the elastic central hole, the cross section of the seal ring is T-shaped, and the width of the part of the seal ring exposed outside the ring groove is 2-3 times of the width of the ring groove.

In the above ball valve working seal assembly with the elastic center hole, the diameter of the first center hole is larger than that of the second center hole.

In the working sealing assembly of the ball valve with the elastic central hole, the movable sealing ring and the fixed sealing ring are coaxially arranged.

In the working sealing assembly of the ball valve with the elastic central hole, the contact part of the movable sealing ring and the fixed sealing ring on the movable sealing ring is a curved surface.

In the above ball valve working seal assembly with an elastic center hole, the contact portion between the movable seal ring and the fixed seal ring on the fixed seal ring is a plane.

Compared with the prior art, the movable sealing ring and the fixed sealing ring are respectively provided with the annular through center hole inside, when the materials of the movable sealing ring and the fixed sealing ring deform under the action of pressure water, the movable sealing ring and the fixed sealing ring can compensate the deformation of the movable sealing ring and the fixed sealing ring by extruding the deformation of the center holes due to the existence of the two center holes, so that the contact matching degree of the movable sealing ring and the fixed sealing ring of the ball valve is effectively controlled, the aim of optimizing the sealing performance of the ball valve is fulfilled, the movable sealing ring and the fixed sealing ring are not easy to scrap due to the fact that the contact matching degree is damaged, and the service life of the ball valve; furthermore, two center holes are formed on the cross section passing through the central axis of the movable sealing ring, the circle center connecting line of the two circles passes through the contact part of the movable sealing ring and the fixed sealing ring, the structural arrangement enables the deformation on the two center holes to be simultaneously and uniformly carried out, after the two center holes are deformed, the contact surface between the movable sealing ring and the fixed sealing ring can reach the maximum, the sealing performance is optimized, the uniform loss of the movable sealing ring and the fixed sealing ring can be realized, and the service life of the sealing element is prolonged.

In addition, a plurality of ring grooves are arranged on the outer side surface of the movable sealing ring connected with the ball valve body, and sealing rings are arranged in the ring grooves, so that the sealing performance of the ball valve is further improved; the cross section of the sealing ring is T-shaped, the width of the part of the sealing ring exposed outside the ring groove is 2-3 times of the width of the ring groove, and the part of the sealing ring exposed outside the ring groove is abutted against the ring groove on the ball valve body, so that the longer exposed length is beneficial to improving the sealing performance.

In conclusion, the invention has the advantages of good sealing performance and long service life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a movable seal ring;

FIG. 3 is a schematic structural view of the stationary seal ring;

fig. 4 is a partial enlarged view of fig. 1 at a.

Reference numerals: 1-a movable sealing ring, 2-a fixed sealing ring, 11-a first central hole, 12-a sealing ring and 21-a second central hole.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.