阅读说明：本技术 一种半球阀 (Semi-ball valve ) 是由 陈闽钢 于 2019-03-14 设计创作，主要内容包括：本发明公开了一种半球阀包括阀体、阀杆、阀瓣,阀杆顶部、滑动轴承的上方还设有石墨填料垫,并通过填料压紧盖将其封于阀体内,阀体出口端与阀瓣球面接触面上设有环形料槽,阀体阀壁上设有注料孔,注料孔的内端与环形凹槽相通,注料孔的外端设有密封盖,凹槽内注有密封填料。本发明具有很好的密封效果,结构简单,密封面加工要求低,在阀体顶轴孔与阀杆之间设有密封石墨层,在半球形阀瓣的外球面与阀体出口端接触面之间设有密封填料腔,有效的提高了半球阀的密封性能,而且还提高半球阀瓣的耐磨性,延长使用寿命。尤其是,在运行管线上(起切断作用)的球阀出现密封问题时,无需更换阀门密封件,只需重新注入密封填料即可。(The invention discloses a half ball valve which comprises a valve body, a valve rod and a valve clack, wherein a graphite packing pad is arranged on the top of the valve rod and above a sliding bearing and is sealed in the valve body through a packing pressing cover, an annular trough is arranged on the contact surface of the outlet end of the valve body and the spherical surface of the valve clack, a material injection hole is arranged on the valve wall of the valve body, the inner end of the material injection hole is communicated with an annular groove, a sealing cover is arranged at the outer end of the material injection hole, and sealing packing is injected in the groove. The semi-spherical valve has the advantages of good sealing effect, simple structure and low processing requirement of a sealing surface, the sealing graphite layer is arranged between the top shaft hole of the valve body and the valve rod, and the sealing filler cavity is arranged between the contact surface of the outer spherical surface of the semi-spherical valve clack and the outlet end of the valve body, so that the sealing performance of the semi-spherical valve is effectively improved, the wear resistance of the semi-spherical valve clack is improved, and the service life is prolonged. Particularly, when the ball valve on the operation pipeline (playing a role in cutting off) has a sealing problem, the sealing part of the valve does not need to be replaced, and only the sealing filler needs to be injected again.)

1. The utility model provides a hemisphere valve, includes valve body, valve rod, valve clack, and the valve body top is equipped with top shaft hole, the bottom is equipped with bottom shaft hole, and the valve rod bottom is connected with bottom shaft hole rotation through slide bearing and straight push bearing, and the top of valve rod is passed through slide bearing and is connected with top shaft hole rotation, and the below in bottom shaft hole is equipped with down the closing cap, and the valve clack is connected with the valve rod and sets up in the valve body its characterized in that:

graphite packing pads are arranged on the top of the valve rod and above the sliding bearing and are sealed in the valve body through a packing pressing cover;

the valve body is characterized in that an annular material groove is arranged on the contact surface of the outlet end of the valve body and the spherical surface of the valve clack, a material injection hole is arranged on the valve wall of the valve body, the inner end of the material injection hole is communicated with an annular groove, a sealing cover is arranged at the outer end of the material injection hole, and graphite filler is injected in the groove.

2. A half ball valve as claimed in claim 1, wherein: the graphite packing is flexible graphite sealing packing.

3. A half ball valve as claimed in claim 1, wherein: the sealing cover is a bolt.

Technical Field

The invention relates to the technical field of valves, in particular to a hemispherical valve.

Background

Traditional half ball valve is mostly metal hard seal structure, the ball valve is in the use, its inside medium can produce the sealed face of ball valve when flowing in the pipeline and wash and the effect of cavitation, wash and under the cavitation that the medium is ceaseless, the sealed face of ball valve takes place local damage very easily, simultaneously in addition chemical erosion action, the combined action is sealed face, thereby lead to the ball valve to easily take place destruction under the erosion action, make it take place the seepage and scrap even, the valve clack wearing and tearing that easily cause the ball valve in the in-process of opening and close very much and sealed not tight, need the whole sealing member of changing after the sealed face of valve clack damages.

When the valve clack of ball valve is sealed and goes wrong, unable direct change, need overhaul after the pipeline is whole to let out empty, great increase the time of salvageing, simultaneously, consequently, lead to the system pipeline to shut down and the loss that causes can't be estimated.

Disclosure of Invention

One technical problem that this disclosed an aspect was solved provides one kind and need not to change the sealing member and can reach the ball valve of sealed effect under the condition of not letting out the pressure, and this technical scheme need not to let out the interior flowing medium of pipeline, very big time of having saved the maintenance, has improved the stability of system's pipeline.

In order to achieve the purpose, the invention adopts the following technical scheme that the valve comprises a valve body, a valve rod and a valve clack, wherein the top of the valve body is provided with a top shaft hole, the bottom of the valve body is provided with a bottom shaft hole, the bottom of the valve rod is rotatably connected with the bottom shaft hole through a sliding bearing and a direct-pushing bearing, the top of the valve rod is rotatably connected with the top shaft hole through the sliding bearing, a lower sealing cover is arranged below the bottom shaft hole, the valve clack is connected with the valve rod and is arranged in the valve body,

graphite packing pads are arranged on the top of the valve rod and above the sliding bearing and are sealed in the valve body through a packing pressing cover;

the valve body is characterized in that an annular material groove is arranged on the contact surface of the outlet end of the valve body and the spherical surface of the valve clack, a material injection hole is arranged on the valve wall of the valve body, the inner end of the material injection hole is communicated with an annular groove, a sealing cover is arranged at the outer end of the material injection hole, and sealing filler is injected in the groove.

Preferably, the graphite filler is a flexible graphite sealing filler.

Preferably, the sealing cover is a bolt.

Compared with the prior art, the invention has the following advantages: the semi-spherical valve has the advantages of good sealing effect, simple structure and low processing requirement of a sealing surface, the sealing graphite layer is arranged between the top shaft hole of the valve body and the valve rod, and the sealing filler cavity is arranged between the contact surface of the outer spherical surface of the semi-spherical valve clack and the outlet end of the valve body, so that the sealing performance of the semi-spherical valve is effectively improved, the wear resistance of the semi-spherical valve clack is improved, and the service life is prolonged. Particularly, when the ball valve on the operation pipeline has a sealing problem, the ball valve does not need to be replaced, and only the graphite filler needs to be injected again.

Drawings

FIG. 1 is a schematic structural diagram in accordance with one aspect of the present disclosure;

FIG. 2 is a schematic view of the A-A directional structure of FIG. 1 according to one aspect of the present disclosure;

in the figure: 1-valve body, 2-valve clack, 3-material injection hole, 4-lower sealing cover, 5-thrust bearing, 6-sliding bearing, 7-valve rod, 8-annular groove, 9-graphite packing pad and 10-packing pressing cover.

Detailed Description

The present invention will be further explained with reference to specific embodiments, but the invention is not limited thereto, and the structures, proportions, sizes, and the like shown in the drawings are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, changes in proportion, or adjustments in size, should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the functions and purposes which can be achieved by the present invention. In addition, the terms "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.