CN211624270U - Bidirectional pressure-bearing hard-sealing eccentric half-ball valve - Google Patents
Bidirectional pressure-bearing hard-sealing eccentric half-ball valve Download PDFInfo
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- CN211624270U CN211624270U CN201922269169.8U CN201922269169U CN211624270U CN 211624270 U CN211624270 U CN 211624270U CN 201922269169 U CN201922269169 U CN 201922269169U CN 211624270 U CN211624270 U CN 211624270U
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Abstract
The utility model relates to a two-way pressure-bearing hard seal eccentric half ball valve, including the valve body, install at the valve gap of valve body, fix the disk seat in valve body one side delivery port department and fix at valve body runner fit in pivoted hemisphere through upper shaft and lower shaft respectively, the hemisphere be eccentric structure, its surface is the echelonment, this eccentric half ball valve is still including setting up the ball seat at the hemisphere surface, this ball seat is annular echelonment to mutually support with the disk seat and form sealed vice. Compared with the prior art, the utility model has the advantages of the low pressure leakproofness is good, positive reverse reliable seal, seal that the specific pressure is even, automatic aligning.
Description
Technical Field
The utility model relates to a hard seal hemisphere valve especially relates to a two-way pressure-bearing hard seal eccentric hemisphere valve.
Background
In the prior art, the eccentric half ball valve structure mainly comprises a soft sealing eccentric half ball valve and a hard sealing eccentric half ball valve. The soft sealing eccentric half ball valve is sealed by metal to rubber, the sealing can reach zero leakage, but the soft sealing eccentric half ball valve can not cut off sundries of a pipeline, a rubber sealing ring is easy to damage and has short service life, and the soft sealing eccentric half ball valve brings great obstruction to normal water supply especially under the underground working condition. The hard seal eccentric hemisphere valve has the advantages that the seal is metal-to-metal, impurities in a pipeline can be effectively cut off, the pipeline is smooth, the overflowing amount is large, the integral sealing performance is poor, and particularly when a medium reversely flushes the hemisphere, the hemisphere is easy to deviate to a certain degree under the action of flushing force, so that the sealing performance is greatly reduced.
Chinese patent CN101418864A discloses a bidirectional full flow passage hard seal eccentric hemisphere valve, which comprises a valve body, wherein the valve body is connected with a valve cover, an eccentric crankshaft is arranged in the valve body, the eccentric crankshaft penetrates out of the valve cover and is sealed with the valve cover, a spherical crown is connected on the eccentric crankshaft, a valve seat is arranged on one side of the valve body, the valve seat is contacted with a valve seat gasket, the valve seat and the valve seat gasket are limited by a pressing ring, a reverse water pressure pressing cavity is arranged between the valve seat and the valve seat gasket along the circumference, and the reverse water pressure pressing cavity is communicated with. Reverse water pressure pressing cavities are arranged between the valve seat and the valve seat gasket along the circumference, so that reverse sealing is realized. The spherical crown and the eccentric crankshaft are rigidly connected, reverse water pressure acts on the spherical crown, the deformation of the spherical crown is uneven, and the deformation in the direction far away from the crankshaft is far larger than that in the direction close to the crankshaft. Although the valve seat is pressed on the sealing surface of the spherical cap by the water pressure of the reverse water pressure pressing cavity, the sealing force is uneven, and effective reverse sealing is difficult to form.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two-way pressure-bearing hard-sealing eccentric half ball valve in order to overcome the defects of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the two-way pressure-bearing hard-sealing eccentric half ball valve comprises a valve body, a valve cover arranged on the valve body, a valve seat fixed at a water outlet on one side of the valve body, and a hemisphere fixed in a flow channel of the valve body through an upper shaft and a lower shaft and matched and rotating in the flow channel of the valve body, wherein the hemisphere is of an eccentric structure, the surface of the hemisphere is in a step shape, the eccentric half ball valve further comprises a ball seat arranged on the outer surface of the hemisphere, and the ball seat is in an annular step shape and is matched with the valve seat to form a.
The ball seat outside pass through the retaining ring pressfitting, prevent to drop.
The ball seat consists of a head part and a tail part, and the head part is provided with a ball seat sealing surface matched with the valve seat sealing surface.
The head of the ball seat is provided with a pressure guide gap between the head of the ball seat and the outer surface of the hemisphere, so that the ball seat is in a floating state, the pressure guide gap is communicated with the forward water outlet side, the sealing of the forward water outlet side and the reverse water outlet side is realized through a first O-shaped ring between the tail of the ball seat and the outer surface of the hemisphere, and a pre-tightening spring is arranged between the head of the ball seat and the outer surface of the hemisphere.
The sealing surface of the ball seat is of a hemispherical shape protruding outwards, and the sealing surface of the valve seat is a plane.
The valve seat is fixed on the valve body through a bolt or a set screw and sealed through a second O-shaped sealing ring.
The upper shaft penetrates through the valve cover and is connected with the manipulator to realize the rotation of the hemispheroid.
The front area of the head part of the ball seat is smaller than the back area.
Compared with the prior art, the utility model has the advantages of it is following:
the bidirectional pressure-bearing hard-sealing eccentric half ball valve provided by the invention adopts an eccentric design, when the valve is opened and closed, the sealing surface of the ball seat is in a swinging motion relative to the valve seat, namely, the sealing surface of the ball seat is close to the valve seat when the valve is closed, and the closer the valve is, the pretightening spring provides pretightening force to provide initial sealing specific pressure between the ball seat and the valve seat, so that the low-pressure sealing performance is ensured.
During forward sealing, the water pressure pushes the hemispheroid to move to the valve seat side, the specific sealing pressure is increased, and therefore the forward sealing is reliable. When reverse seal, water pressure leads through ball seat and hemisphere and presses the clearance to get into the ball seat back, forms the thrust reversal to the ball seat, because water pressure effect is less than the water pressure area at the back at the positive area of ball seat, and pressure differential makes the ball seat move to the valve seat side, sticiss the valve seat sealed face, improves sealed specific pressure, and water pressure is big more, and sealing performance is better.
The ball seat is designed to float on the hemisphere, the deformation of the hemisphere caused by reverse water pressure has no influence on the ball seat, the condition of uneven sealing specific pressure of the ball seat is overcome, and the sealing reliability is greatly improved.
The sealing surface of ball seat is spherical, and the sealing surface of valve seat is planar, and the two is line contact, can automatic aligning, has compensatied not enough that valve body processing or assembly error brought, greatly reduced manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of the structure of part i in fig. 1.
Wherein: 1. the valve comprises a valve body, 2, a valve cover, 3, a hemisphere, 4, an upper shaft, 5, a lower shaft, 6, a ball seat, 7, a first O-shaped ring, 8, a retainer ring, 9, a valve seat, 10, a second O-shaped ring, 11, a bolt, 12, a pressure guide gap, 13, a ball seat sealing surface, 14, a valve seat sealing surface, 15 and a pre-tightening spring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example (b):
as shown in fig. 1 and 2, the bidirectional pressure-bearing hard-sealing eccentric half ball valve provided by the invention comprises a valve body 1, a valve cover 2, a half ball body 3, a ball seat 6 and a valve seat 9, wherein the valve body 1 is connected with the valve cover 2, the rotatable half ball body 3 is placed in the valve body 1, the valve seat 9 is installed at a water outlet at one side of the valve body 1, a second O-shaped ring 10 is arranged on the valve seat 9 and is sealed by matching with the valve body 1, the valve seat 9 is fixed on the valve body 1 through a bolt 11, the half ball body 3 is of an eccentric structure and is fixed through an upper shaft 4 and a lower shaft 5, the upper shaft 4 penetrates through the valve cover 2 and is sealed with the.
The valve adopts an eccentric design, when the valve is opened and closed, the sealing surface 13 of the ball seat is in swing motion relative to the valve seat 9, namely when the valve is closed, the sealing surface 13 of the ball seat is attached to the sealing surface 14 of the valve seat, the more the pressure is, the pretightening spring 15 provides pretightening force on the back surface, and the initial sealing specific pressure of the ball seat 6 and the valve seat 9 is provided, so that the low-pressure sealing performance is;
when the hemisphere 3 is sealed in the forward direction, the water pressure pushes the hemisphere 3 to move to the valve seat 9 side to increase the sealing specific pressure, so the forward sealing is reliable, when the reverse sealing is performed, the water pressure enters the back of the ball seat 6 through the pressure guide gap 13 between the ball seat 6 and the hemisphere 3 to form the reverse thrust to the ball seat 6, because the area S1 of the water pressure acting on the front of the ball seat 6 is smaller than the water pressure area S2 of the back, the pressure difference delta F (S2-S1) promotes the ball seat 6 to move to the valve seat 9 side, the sealing surface 14 of the valve seat improves the sealing specific pressure, the water pressure is larger, the sealing performance is better, in addition, because the ball seat 6 adopts the floating sealing design on the hemisphere 3, the deformation generated by the reverse water pressure on the hemisphere 3 has no influence on the ball seat 6, thereby the condition that the sealing specific pressure of the ball seat 6 is not uniform is overcome, the sealing reliability is greatly improved, the sealing surface 14 of the valve seat 9 is a plane, and the two are in line contact, so that the valve seat can be automatically aligned, the defects caused by machining or assembling errors of the valve body are overcome, and the manufacturing cost is greatly reduced.
Claims (7)
1. The utility model provides a two-way pressure-bearing seals eccentric half ball valve firmly, includes valve body (1), installs valve gap (2) in valve body (1), fixes disk seat (9) in valve body (1) one side forward delivery port department and fixes at valve body runner fit pivoted hemisphere (3) through upper shaft (4) and lower shaft (5) respectively, its characterized in that, hemisphere (3) be eccentric structure, its surface is the echelonment, this eccentric half ball valve is still including setting up ball seat (6) at hemisphere (3) surface, this ball seat (6) are annular echelonment to mutually support with disk seat (9) and form sealed vice, ball seat (6) outside pass through retaining ring (8) pressfitting, prevent to drop.
2. The eccentric hemisphere valve with the bidirectional pressure-bearing hard seal as claimed in claim 1, wherein the ball seat (6) is composed of a head part and a tail part, and the head part is provided with a ball seat sealing surface (13) which is matched with the valve seat sealing surface (14).
3. The eccentric hemisphere valve with the bidirectional pressure-bearing hard seal as claimed in claim 2, wherein a pressure guide gap (12) is formed between the head of the ball seat (6) and the outer surface of the hemisphere (3) so that the ball seat (6) is in a floating state, the pressure guide gap (12) is communicated with the forward water outlet side and is blocked and sealed with the reverse water outlet side through a first O-shaped ring (7) between the tail of the pressure guide gap and the outer surface of the hemisphere (3), and a pre-tightening spring (15) is arranged between the head of the ball seat (6) and the outer surface of the hemisphere (3).
4. The bi-directional pressure-bearing hard-sealing eccentric hemisphere valve according to claim 2, characterized in that the ball seat sealing surface (13) is a hemisphere protruding outwards, and the valve seat sealing surface (14) is a plane.
5. The two-way pressure-bearing hard-sealing eccentric half-ball valve according to claim 1, wherein the valve seat (9) is fixed on the valve body (1) through a bolt (11) or a set screw and sealed through a second O-shaped sealing ring (10).
6. The two-way pressure-bearing hard-sealing eccentric half-ball valve as claimed in claim 1, wherein the upper shaft (4) passes through the valve cover (2) and is connected with an operating machine to realize the rotation of the hemisphere (3).
7. The bi-directional pressure-bearing hard-sealing eccentric half-ball valve as claimed in claim 2, wherein the head of the ball seat (6) has a smaller frontal area than a rear area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922269169.8U CN211624270U (en) | 2019-12-17 | 2019-12-17 | Bidirectional pressure-bearing hard-sealing eccentric half-ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922269169.8U CN211624270U (en) | 2019-12-17 | 2019-12-17 | Bidirectional pressure-bearing hard-sealing eccentric half-ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211624270U true CN211624270U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922269169.8U Active CN211624270U (en) | 2019-12-17 | 2019-12-17 | Bidirectional pressure-bearing hard-sealing eccentric half-ball valve |
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| Country | Link |
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| CN (1) | CN211624270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187945A (en) * | 2021-06-09 | 2021-07-30 | 艾通电磁技术（昆山）有限公司 | Low-leakage oil control electromagnetic valve sealing structure |
| CN114321430A (en) * | 2021-12-31 | 2022-04-12 | 湖南泵阀制造有限公司 | Bidirectional hard sealing rotary ball valve |
-
2019
- 2019-12-17 CN CN201922269169.8U patent/CN211624270U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187945A (en) * | 2021-06-09 | 2021-07-30 | 艾通电磁技术（昆山）有限公司 | Low-leakage oil control electromagnetic valve sealing structure |
| CN114321430A (en) * | 2021-12-31 | 2022-04-12 | 湖南泵阀制造有限公司 | Bidirectional hard sealing rotary ball valve |
| CN114321430B (en) * | 2021-12-31 | 2024-03-12 | 湖南泵阀制造有限公司 | Bidirectional hard sealing rotary ball valve |
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Address after: Tak Road 201802 Shanghai city Jiading District Nanxiang Town, No. 815 Patentee after: Shanghai Guanlong valve energy saving equipment Co., Ltd Address before: Tak Road 201802 Shanghai city Jiading District Nanxiang Town, No. 815 Patentee before: Shanghai Guanlong Valve Machinery Co., Ltd |