Marine high-performance flexible sliding composite sealing seat
阅读说明:本技术 海工高性能挠性滑动复合密封座 (Marine high-performance flexible sliding composite sealing seat ) 是由 丁波 俞垚 范柳卫 徐勇德 范成裕 夏明� 翁武秀 于 2019-10-30 设计创作,主要内容包括:本发明提供一种海工高性能挠性滑动复合密封座,其包含:支撑座,主体为环形结构;阀座,设置在所述支撑座的第一侧,与阀球的球体接触实现密封;唇形复合密封圈,设置在所述支撑座的第二侧,与阀体接触实现密封;所述唇形复合密封圈进一步包含:唇式密封圈,设有开口;弹簧圈,通过所述开口设置到所述唇式密封圈内;限位环,对所述开口封闭,并与所述弹簧圈相结合形成弹性蓄能结构。本发明的海工高性能挠性滑动复合密封座为超低温球阀核心部件,在低温工况下具有自动补偿密封,低扭矩长寿命,防火和超压自动排放功能。(The invention provides a maritime work high-performance flexible sliding composite sealing seat, which comprises: the main body of the supporting seat is of an annular structure; the valve seat is arranged on the first side of the supporting seat and is in contact with the ball body of the valve ball to realize sealing; the lip-shaped composite sealing ring is arranged on the second side of the supporting seat and is in contact with the valve body to realize sealing; the lip-shaped composite seal ring further comprises: the lip type sealing ring is provided with an opening; the spring ring is arranged in the lip type sealing ring through the opening; and the limiting ring is used for sealing the opening and is combined with the spring ring to form an elastic energy storage structure. The marine high-performance flexible sliding composite sealing seat is an ultralow temperature ball valve core component, and has the functions of automatic compensation sealing, low torque, long service life, fire prevention and overpressure automatic discharge under the low-temperature working condition.)
1. A marine high performance flexible sliding composite seal seat, comprising:
an annular support seat (11);
the valve seat (12) is arranged on the first side of the supporting seat (11) and is in contact with the ball body of the valve ball to realize sealing;
the lip-shaped composite sealing ring (13) is arranged on the second side of the supporting seat (11) and is in contact with the valve body (20) to realize sealing;
the lip-shaped composite seal ring (13) further comprises:
a lip seal (131) having an opening;
a spring ring (132) disposed through the opening into the lip seal (131);
and the limiting ring (133) is used for closing the opening and forms an elastic energy storage structure in combination with the spring ring (132).
2. The marine high performance flexible sliding composite seal holder according to claim 1, wherein the lip-shaped composite seal ring (13) is installed in a compressed state to forcibly seal against the valve body (20) and the support seat (11).
3. Marine high performance flexible sliding composite seal holder according to claim 1 or 2, characterised in that the valve seat (12) is rolled in a first groove in the first side of the support seat (11);
and the lip-shaped composite sealing ring (13) is embedded in a second groove on the second side of the supporting seat (11).
4. The marine high performance flexible sliding composite seal seat according to claim 1, wherein the first side of the valve seat (12) is formed with a spiral sealing structure for sealing in contact with the support seat (11); the second side of the valve seat (12) is a spherical sealing surface and is in contact with a sphere to realize sealing.
5. The marine high performance flexible sliding composite seal seat according to claim 1 wherein said valve seat (12) is formed from PCTFE material;
the spring ring (132) is made of a nickel-based alloy material;
the limiting ring (133) is made of austenitic stainless steel;
the lip type sealing ring (131) is made of PCTFE material.
6. The marine high performance flexible sliding composite seal housing of claim 1, wherein the seal face of the marine high performance flexible sliding composite seal housing (10) on the first side has an area difference from the seal face on the second side.
7. The marine high-performance flexible sliding composite seal seat according to claim 6, characterized in that when the pressure of the medium temperature change in the cavity of the valve body (20) rises above the set multiple of the working pressure, the area difference between the sealing surface on the first side and the sealing surface on the second side of the marine high-performance flexible sliding composite seal seat (10) is utilized to separate the sealing between the ball and the valve seat (12) under the action of the medium pressure, so that the medium is automatically discharged into the medium pipeline, and the pressure relief during abnormal pressure rise is realized; the setting multiple was 1.3 times.
8. The marine high performance flexible sliding composite seal seat according to claim 1, wherein the first side of the support seat (11) is provided with a third groove and embedded with a metal wire graphite ring (14).
9. The marine high performance flexible sliding composite seal seat as claimed in claim 1, wherein said valve ball is an eccentric structure in which the center line of the ball and the center line of the fluid straight-through hole are not concentric; the valve ball is provided with an eccentric straight-through hole (32), and a plane defined by an inlet and an outlet of the valve ball is inclined relative to the central line of the ball body;
the valve body (20) is provided with symmetrical double inclined planes as sealing surfaces, and the inclination of the inclined planes of the valve body (20) corresponds to the inclination of a valve ball; the double inclined planes of the valve body (20) are respectively provided with the marine high-performance flexible sliding composite sealing seat (10).
10. The marine high performance flexible sliding composite seal carrier according to claim 1 wherein the plane defined by the inlet and outlet ports at the eccentric straight flow bore (32) of the valve ball is inclined at 3 ° to the centerline of the ball; the slope of the inclined plane of the valve body (20) is 3 degrees.
Technical Field
The invention relates to the field of maritime work ultralow-temperature ball valves, in particular to a maritime work high-performance flexible sliding composite sealing seat.
Background
The continuous development of ocean engineering equipment and high-technology ships meets the requirement of applying maritime work ultralow-temperature ball valves in the ocean engineering field of ships in China. The common low-temperature ball valve has the problems of poor sealing, short service life, poor reliability, large torque, incapability of online maintenance and the like, and a high-performance ultralow-temperature ball valve which can be maintained online, has zero leakage, low torque, long service life and high reliability needs to be developed.
Disclosure of Invention
The invention aims to provide a marine high-performance flexible sliding composite sealing seat which has the functions of automatic compensation sealing, low torque, long service life, fire prevention and overpressure automatic discharge under the low-temperature working condition.
In order to achieve the above object, the present invention provides a marine high performance flexible sliding composite seal seat, comprising:
an annular support seat;
the valve seat is arranged on the first side of the supporting seat and is in contact with the ball body of the valve ball to realize sealing;
the lip-shaped composite sealing ring is arranged on the second side of the supporting seat and is in contact with the valve body to realize sealing;
the lip-shaped composite seal ring further comprises:
the lip type sealing ring is provided with an opening;
the spring ring is arranged in the lip type sealing ring through the opening;
and the limiting ring is used for sealing the opening and is combined with the spring ring to form an elastic energy storage structure.
Optionally, the lip-shaped composite sealing ring is in a compressed state when being installed, and is forcibly sealed and tightly attached to the valve body and the supporting seat.
Optionally, the valve seat is rolled in a first groove on a first side of the support seat;
the lip-shaped composite sealing ring is embedded in the second groove on the second side of the supporting seat.
Optionally, a spiral sealing structure is formed on the first side of the valve seat and is in contact with the supporting seat to realize sealing; the second side of the valve seat is a spherical sealing surface and is in contact with the ball body to realize sealing.
Optionally, the valve seat is made of PCTFE material;
the spring ring is made of a nickel-based alloy material;
the limiting ring is made of austenitic stainless steel;
the lip type sealing ring is made of PCTFE material.
Optionally, the seal face of the first side of the marine high performance flexible sliding composite seal seat has an area difference with the seal face of the second side.
Optionally, when the medium temperature change pressure in the cavity of the valve body rises to exceed a set multiple of working pressure, the sealing of the ball and the valve seat is separated under the action of medium pressure by using the area difference between the sealing surface on the first side and the sealing surface on the second side of the marine high-performance flexible sliding composite sealing seat (10), so that the medium is automatically discharged into a medium pipeline, and the pressure relief during abnormal pressure rise is realized; the setting multiple was 1.3 times.
Optionally, the first side of the support seat is provided with a third groove and embedded with a metal wire graphite ring.
Optionally, the valve ball adopts an eccentric structure that the center line of the ball body and the center line of the fluid straight-through hole are not concentric; the valve ball is provided with an eccentric straight-flow hole, and a plane defined by an inlet and an outlet of the valve ball is inclined relative to the central line of the ball body;
the valve body is provided with symmetrical double inclined planes as sealing surfaces, and the inclination of the inclined planes of the valve body corresponds to the inclination of the valve ball; the double inclined planes of the valve body are respectively provided with the marine high-performance flexible sliding composite sealing seat.
Optionally, at the eccentric straight-flow hole of the valve ball, the inclination of a plane defined by the inlet and the outlet relative to the central line of the ball is 3 degrees; the slope of the inclined plane of the valve body is 3 degrees.
The invention relates to a maritime work high-performance flexible sliding composite sealing seat, which has the advantages that:
the adopted sealing valve seat has small shrinkage under the ultralow temperature working condition; the sealing valve seat is rolled on the supporting seat, a sealing waterline is processed at the bottom of the valve seat and is contacted with the supporting ring to realize reliable sealing, and the spherical sealing surface of the sealing valve seat and the ball body realize reliable sealing.
A lip-shaped composite sealing ring comprising a spring ring, a limiting ring and a lip-shaped sealing ring is adopted; the lip type sealing ring plays a role in sealing; the spring ring and the limit ring have good combination elasticity, high low-temperature and abrasion compensation capacity, low torque and long service life. The marine high-performance flexible sliding composite sealing seat can slide downwards along the sealing inclined plane of the valve body to implement sealing compensation.
The support ring is preferably provided with a groove for embedding a metal wire graphite ring, and has a reliable fireproof function.
When the medium temperature change pressure in the valve body cavity is increased to exceed 1.3 times of working pressure, the area difference of the front sealing surface and the rear sealing surface of the marine high-performance flexible sliding composite sealing seat is utilized, the ball body and the valve seat are separated from sealing under the action of medium pressure, and the medium is automatically discharged into a medium pipeline, so that the abnormal pressure boosting and pressure relieving function is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of a marine inclined-plane eccentric ultralow temperature ball valve;
FIG. 2 is a front view of a marine high performance flexible sliding composite seal housing;
FIG. 3 is a schematic side sectional view of a portion of the structure of a marine high performance flexible sliding composite seal housing;
FIG. 4 is a side cross-sectional schematic view of a lip composite seal ring;
FIG. 5 is a side cross-sectional view of the support seat and sealing seat;
FIG. 6 is a schematic side cross-sectional view of a support seat with a flame-retardant structure and a sealing seat;
FIG. 7 is a schematic view of a marine bevel eccentric integral ball;
fig. 8 is a schematic view of a valve body.
Detailed Description
As shown in figure 1, the marine high-performance flexible sliding
Referring to fig. 1, 7 and 8, the sphere of the maritime slope eccentric
As shown in fig. 2 to 5, the marine high-performance flexible sliding
The
As shown in fig. 4, the lip-shaped
When the lip-shaped
When the size changes due to temperature changes, the marine high-performance flexible sliding
When the valve is opened, the internal flow passage of the valve ball and the cavity between the valve ball and the
For example, a fireproof structure can be arranged on the
In conclusion, the marine high-performance flexible sliding composite sealing seat disclosed by the invention is reliable in sealing under a low-temperature working condition, has the functions of automatic compensation sealing, low torque and long service life, and also has the functions of fire prevention and overpressure automatic discharge.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
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