A gate valve capable of indicating opening and closing state and blocking liquid leakage

Abstract

The invention discloses a gate valve capable of indicating an opening / closing state and shielding leaked liquid. The gate valve comprises a rotary hand wheel (1), a valve body (2), a valve cover (3), a gate plate (4), a valve rod (5) and a filler pressing screw cap (6); a corrugated pipe (7) is screwed with a lifting wheel (8); an indicating hole (9) is formed in a transverse wall of the corrugated pipe (7); the upper end of the corrugated pipe (7) is fixedly connected with the lifting wheel (8), and the lower end is connected with a weighter (10); the weighter (10) is provided with a polygonal hole rightly sleeved with the pressing screw cap (6); and the lifting wheel (8) and the gate plate (4) are consistent in the lifting directions. The opening / closing state of the gate valve is reflected by dint of the shape represented by the indicating hole (9); and the leaked liquid dashing to the hand wheel (1) is stopped by dint of the lifting wheel (8) and the corrugated pipe (7).

Description

technical field [0001] The invention belongs to valves, and more specifically relates to a gate valve capable of indicating opening and closing states and blocking liquid leakage. Background technique [0002] Gate valves are mostly used in liquid logistics systems in the chemical industry. The opening and closing of an existing gate valve is realized by rotating the rotary handwheel counterclockwise or clockwise. Direction indication, however, does not have the indication function of the opening and closing state, and the gate valve is often required to have this function in actual production. For example, when the upstream of the logistics system unexpectedly stops the transportation, there is no liquid flowing out of the downstream, and the gate valve in the open state , It is easy to be mistaken for being in a closed state, so that it should not be closed. Once the upstream transportation resumes, it will often be wasted or a safety accident will occur. [0003] In addi...

AI Technical Summary

Problems solved by technology

[0002] Gate valves are mostly used in liquid logistics systems in the chemical industry. The opening and closing of an existing gate valve is realized by rotating the rotary handwheel counterclockwise or clockwise. Direction indication, however, does not have the indication function of the opening and closing state, and the gate valve is often required to have this function in actual production. For example, when the upstream of the logistics system unexpectedly stops the transportation, there is no liquid flowing out of the downstream, and the gate valve in the open state , it is easy to be mistaken for being in a closed state, so that it should not be closed. Once the upstream transportation resumes, it will often be wasted or a safety accident will occur

[0003] In addition, when the packing or packing pad in the packing compression nut is damaged, the liquid material is often sprayed from the valve stem and the packing compression nut to the rotary handwheel, so that it is difficult for the operator to approach the rotary handwheel with bare hands and close the gate valve. ,

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