Plunger type sampling valve

Abstract

The invention discloses a plunger type sampling valve. The plunger type sampling valve comprises a valve body, a valve rod, a plunger and a hand wheel, wherein a flow channel is formed in the valve body, a sampling pipe which communicates with the flow channel is arranged on one side of the valve body, the plunger can block an inlet of the sampling pipe, a plurality of sealing rings sleeve the plunger, a first polygonal groove is formed in the upper end of the valve rod, a first polygonal linkage block matched with the first polygonal groove is arranged in the first polygonal groove, a secondpolygonal linkage block with the width smaller than the first polygonal linkage block is arranged at the upper end of the first polygonal linkage block, the second polygonal linkage block is made of ferromagnetic materials, a plurality of bending limiting blocks capable of blocking the first polygonal linkage block are arranged at the upper end of the inner wall of the first polygonal groove, thebending limiting blocks surround the periphery of the upper end of the second polygonal linkage block, the lower end of the hand wheel is provided with a counter bore inserted into the valve rod, thebottom of the counter bore is provided with a second polygonal groove matched with the second polygonal linkage block, and a strong magnet is embedded at the bottom of the second polygonal groove. Theplunger type sampling valve can prevent misoperation and is higher in safety.

Description

technical field [0001] The invention relates to a plunger type sampling valve. Background technique [0002] At present, the plunger type sampling valves provided on the market generally include a valve body, a valve stem, a plunger and a handwheel. There is a flow channel on the valve body, and a sampling tube that can communicate with the flow channel is provided on one side of the valve body. The valve can be opened and closed by turning the handwheel, which cannot prevent people from misoperation, and non-professionals can easily open and close the valve, which will cause unpredictable consequences. Contents of the invention [0003] In view of the deficiency of the background technology, the technical problem to be solved by the present invention is to provide a plunger type sampling valve capable of preventing misoperation. [0004] For this reason, the present invention is to adopt following technical scheme to realize: [0005] The plunger type sampling valve in...

AI Technical Summary

Problems solved by technology

[0002] At present, the plunger type sampling valves provided on the market generally include a valve body, a valve stem, a plunger and a handwheel. There is a flow channel on the valve body, and a sampling tube that can communicate with the flow channel is provided on one side of the valve body. The valve can be opened and closed by turning the handwheel, which cannot prevent people from misoperation, and non-professionals can easily open and close the valve, which will cause unpredictable consequences

Images