Corrugated pipe valve

Abstract

The invention discloses a corrugated pipe valve. The corrugated pipe valve comprises a pair of adjusting devices which are installed at the top of a sealing cover, located in a supporting frame and used for pressing filler, wherein the adjusting devices are located on the left side and the right side of a valve rod correspondingly and are in bilateral symmetry about the valve rod, the lower ends of the adjusting devices are installed on the valve rod, the upper ends of the adjusting devices are installed on the sealing cover, the corrugated pipe assembly is located in the valve cover, through the arrangement of an auxiliary ring A, an auxiliary ring B, a guide inclined plane A and a guide inclined plane B, the area of the corrugated pipe connector is increased, the heat capacity is improved, the welding area is increased, the strength of the corrugated pipe connector is improved, meanwhile, a first corrugated pipe and a second corrugated pipe are used for bearing pressure together, and the pressure bearing capacity is greatly improved; the problems that an existing filler is prone to sliding, and the sealing effect of a valve rod is poor are solved through the adjusting device; and a wedge block structure is formed among a translation frame, rollers, a translation block A and a translation block B, an adjustment rod is rotated to drive the translation block A and the translation block B to move downwards, and the pressing rod and the pressing plate press the filler downwards.

Description

technical field [0001] In particular, the invention relates to a bellows valve. Background technique [0002] With the rapid development of modern industries such as chemical industry and nuclear industry, there are more and more pipelines with flammable, explosive, highly toxic and radioactive media. The valves used in these pipelines and devices have special and strict requirements for their leakage and sealing. , the use of general packing sealing device can no longer meet the requirements, so it is necessary to adopt the valve stem sealing structure with bellows. [0003] The bellows valve is to install an extra layer of protective film in the sealing element, which can expand and contract with the opening and closing of the valve stem. It not only improves energy efficiency, increases the safety of production equipment, reduces maintenance costs and frequent maintenance, but also provides a clean and safe working environment. However, the existing bellows valves have ...

AI Technical Summary

Problems solved by technology

However, the existing bellows valves have the following problems: one is that the bellows is sleeved outside the valve stem, and the two ends are respectively connected to the valve stem and the valve cover by welding. During welding, welding can only be performed radially from the interface of the bellows. The fluid pressure inside the valve and the pressure of the valve on the bellows when the valve is opened will pass through the weld, causing the weld to crack, resulting in rupture and leakage; the second is that the valve stem and the packing will slide, and the sealing effect is not good

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