An anti-mis-opening and mis-closing manual ball valve

Abstract

The invention discloses a manual ball valve preventing mistaken opening and closing. The manual ball valve comprises a valve body, a valve rod, an opening-closing position restraining piece connected with the valve rod, and locating bolts arranged on the two sides of the valve rod, wherein limiting sliding pieces used for preventing the ball valve from being mistakenly opened or mistakenly closed are arranged on the opening-closing position restraining piece. Through the device, the opening-closing state of the ball valve in the working state is maintained, the maintaining of the opening-closing state of the ball valve requires to be manually unlocked, the mistaken touch prevention function can be further shielded under the condition that accessories are not changed and disassembled, and the utilization convenience in the debugging maintenance state is achieved; and the manual ball valve is reasonable in structure, easy and convenient to operate, high in safety and applicable to popularization and utilization.

Description

technical field [0001] The invention relates to a ball valve, in particular to a mis-opening and mis-closing prevention type manual ball valve. Background technique [0002] Ball valve is a common valve in industrial production and daily life. The closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve the purpose of opening and closing. It has small fluid resistance, simple structure, small size, light weight and reliability. High performance, easy operation, etc., are widely used. Because the operation between its fully closed and fully opened only has 90° (1 / 4 circle), and it is easy to cause its mis-opening or mis-closing and is difficult to be detected, thereby causing accidents. [0003] In the prior art, the method of installing the positioning piece on the valve handle of the ball valve is often used, and the positioning piece at the switch position is perforated to insert a pin or lock. Although the safety is guaranteed,...

AI Technical Summary

Problems solved by technology

Because the operation between fully closed and fully open is only 90° (1 / 4 turn), it is easy to cause it to be opened or closed by mistake and it is not easy to be detected, resulting in accidents

[0003] In the prior art, the method of installing the positioning piece on the valve handle of the ball valve is often used, and the positioning piece at the switch position is perforated to insert a pin or lock. Although the safety is guaranteed, the complexity of the operation is increased. If the pin and the lock during use If it is lost, it cannot prevent misoperation

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