Fixed ball valve
A technology of fixed ball valve and fixed end, which is applied in the direction of valve details, valve device, valve shell structure, etc., can solve the problems of many welds, easy leakage points, complex structure of fixed ball valves, etc., and achieve fewer welds, less leakage points, The effect of simple structure
Pending Publication Date: 2020-05-01
NEWAY VALVE SUZHOU
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Problems solved by technology
[0003] Therefore, the technical problem to be solved by the present invention is to overcome the complex structure of the fixed ball valve in the prior art, many welding seams, and the defects such as leaks, so as to provide a fixed ball valve with simple structure, fewer welds, and less prone to leaks. ball valve
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[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention relates to the technical field of ball valves, in particular to a fixed ball valve. The fixed ball valve comprises a first valve body and a second valve body which are welded. A ball body is installed in a first cavity formed by welding the first valve body and the second valve body. The ball body achieves fixation and locating through a valve rod and a locating assembly. The first valve body and the second valve body are provided with discharging channels of welding slag and welding gas. The valve rod adopts double-bearing support. A shaft step on the valve rod and a limiting step on a second installation hole of the first valve body form a valve rod blowout preventing structure. The fixed ball valve is simple in structure, less in weld seam and not prone to generating leakage points; welding slag and welding gas discharging channels can effectively reduce stress concentration and welding deformation, and the service life of the ball valve is prolonged; the blowout preventing structure is simple and reliable; and by means of double-bearing support, support stiffness of the valve rod is improved, and the opening and closing resistance force of the valve is reduced.
Description
technical field [0001] The invention relates to the technical field of ball valves, in particular to a fixed ball valve. Background technique [0002] The trunnion ball valve is a medium used for long-distance transportation and industrial pipelines, which requires high sealing performance and good reliability. With the development of economy and valve technology, more and more fixed ball valves with fully welded valve bodies are used in the pipeline transportation field. Compared with traditional ball valves, fully welded fixed ball valves improve the sealing performance and reliability of ball valves to a certain extent. However, the existing all-welded fixed ball valve also has other problems, such as complex structure, many welds, and easy to produce leaks; no welding slag, welding gas discharge structure, welds are prone to slag holes and pores, which affect the welding strength, and are also prone to leakage. Stress concentration is easy to produce stress cracks, whic...
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IPC IPC(8): F16K5/06F16K5/08F16K27/06F16K27/10
CPCF16K5/06F16K5/08F16K27/067F16K27/107
Inventor 杨昭斌王强
Owner NEWAY VALVE SUZHOU