阅读说明：本技术 一种在线维修低温球阀及其工装 (Online maintenance low temperature ball valve and frock thereof ) 是由 钱玉峰 陈继江 孙方宏 沈圣华 于 2019-10-12 设计创作，主要内容包括：本发明涉及阀门技术领域,尤其涉及一种在线维修低温球阀,包括：阀体、阀芯、阀座组件和阀盖；阀体包括用于介质流通的轴向通道和与轴向通道垂直的径向通道；阀座组件对称设置在轴向通道内,包括弹性组件和轴向密封组件,轴向密封组件包括阀座支撑圈,阀座支撑圈与阀芯的球面接触,阀座支撑圈与阀芯接触的面为弧形面,弧形面上设置有用于固定密封圈的密封槽,阀座支撑圈沿轴向通道可移动设置,且阀座支撑圈的端部凸出于径向通道的一侧壁设置,且凸出的部分上设置有凹槽。本发明通过轴向密封组件中阀座支撑圈凸出于径向通道的设置,使得通过工装可以方便的将阀座支撑圈往管道两个轴向方向分别拉开取出阀芯,不影响介质的正常输送。(The invention relates to the technical field of valves, in particular to an online maintenance low-temperature ball valve, which comprises: the valve comprises a valve body, a valve core, a valve seat assembly and a valve cover; the valve body comprises an axial channel for medium circulation and a radial channel perpendicular to the axial channel; the valve seat assembly is symmetrically arranged in the axial channel and comprises an elastic assembly and an axial sealing assembly, the axial sealing assembly comprises a valve seat supporting ring, the valve seat supporting ring is in contact with the spherical surface of the valve core, the contact surface of the valve seat supporting ring and the valve core is an arc-shaped surface, a sealing groove for fixing a sealing ring is formed in the arc-shaped surface, the valve seat supporting ring is movably arranged along the axial channel, the end part of the valve seat supporting ring protrudes out of one side wall of the radial channel, and a groove is formed in the protruding part. According to the invention, the valve seat supporting ring in the axial sealing assembly protrudes out of the radial channel, so that the valve seat supporting ring can be conveniently pulled away in two axial directions of the pipeline respectively by the tool to take out the valve core, and the normal conveying of a medium is not influenced.)

1. An online service cryogenic ball valve, comprising: the valve comprises a valve body (10), a valve core (20), a valve seat assembly (30) and a valve cover (40);

the valve body (10) comprises an axial channel (11) for medium circulation and a radial channel (12) perpendicular to the axial channel (11), and the valve core (20) is installed in the axial channel (11) through the radial channel (12);

the valve seat assembly (30) is symmetrically arranged in the axial channel (11) and comprises an elastic assembly (31) and an axial sealing assembly (32), the elastic assembly (31) provides thrust for the axial sealing assembly (32), the axial sealing assembly (32) further comprises a valve seat supporting ring (321), the valve seat supporting ring (321) is in spherical contact with the valve core (20), the surface of the valve seat supporting ring (321) in contact with the valve core (20) is an arc surface, a sealing groove for fixing a sealing ring is formed in the arc surface, the valve seat supporting ring (321) is movably arranged along the axial channel (11), the end of the valve seat supporting ring (321) protrudes out of one side wall of the radial channel (12), and a groove (3211) is formed in the protruding part.

2. The on-line maintenance cryogenic ball valve of claim 1, wherein the axial sealing assembly (32) further comprises an axial channel sealing seat (322), the axial channel sealing seat (322) is sleeved on the valve seat support ring (321), a thread corresponding to the axial channel (11) is arranged on the axial channel sealing seat (322), and a graphite sealing gasket is arranged between the end of the axial channel sealing seat (322) and the axial channel (11).

3. An on-line service cryogenic ball valve according to claim 2, wherein the axial sealing assembly (32) further comprises a bellows (323), the bellows (323) is sleeved on the valve seat support ring (321), one end of the bellows (323) is connected with the channel seal seat (322), and the other end of the bellows (323) is connected with the inner end of the valve seat support ring (321).

4. An on-line maintenance cryogenic ball valve according to claim 3, characterized in that the valve seat support ring (321), the bellows (323) and the axial passage seal seat (322) are welded into a whole, and the end face of the axial passage seal seat (322) is provided with a fixing auxiliary hole for facilitating the integral screwing into the axial passage (11).

5. The on-line maintenance cryogenic ball valve of claim 1, wherein the elastic component (31) comprises a spring support seat (311) and a valve seat spring (312), one end of the spring support seat (311) is embedded into the axial channel (11), the other end of the spring support seat is embedded into the axial seal component (32), a spring fixing portion is arranged in the middle of the spring support seat (311), spring fixing cavities are uniformly distributed on the spring fixing portion along the circumference, one end of the valve seat spring (312) is embedded into the spring fixing cavities, and the other end of the valve seat spring is connected with the inner wall of the axial channel (11).

6. An on-line service cryogenic ball valve according to claim 1, wherein the valve cover (40) and the radial channel (12) are sealed by a tongue and groove structure, and a graphite sealing gasket is arranged in the tongue and groove structure.

7. An on-line service cryogenic ball valve according to claim 1, wherein the bonnet (40) is lengthened to protect the packing and actuators of the valve stem.

8. A tool for maintaining the on-line maintenance low-temperature ball valve according to any one of claims 1 to 7, wherein the tool comprises a supporting seat (51), a pull rod (52) and a pull plate (53), the supporting seat (51) is fixed on a flange of a valve body for fixing a valve cover, the pull rod (52) axially penetrates through the supporting seat along the valve body, one end of the pull rod (52) is connected with the pull plate (53), and the pull plate (53) extends into the valve body and is embedded into a groove (3211) of the valve seat supporting ring (321).