Gate valve with opening and closing state indication and leakage liquid shielding functions

Abstract

The invention discloses a gate valve with opening and closing state indication and leakage liquid shielding functions. 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), a filler pressing screw cap (6), a corrugated pipe (7) and a slide rod (8), wherein the valve rod (5) is screwed with an ascending and descending wheel (9); the ascending and descending wheel (9) is provided with a slide hole in a vertical direction; the pressing screw cap (6) is provided with an inserting hole; the slide rod (8) is parallel to the valve rod (5), passes through the slide hole, and is inserted in the inserting hole; indicating holes (10) are formed in the circumferential wall of the corrugated pipe (7); the upper end of the corrugated pipe (7) is fixedly connected with the edge of the ascending and descending wheel (9); the lower end of the corrugated pipe (7) is connected with a heavy weight (11). By the form shown by the indicating holes (10), the opening and closing state of the gate valve is reflected; by the ascending and descending wheel (9) and the corrugated pipe (7), leakage liquid flowing to the hand wheel (1) is blocked.

Description

technical field [0001] The invention belongs to valves, and more specifically relates to a gate valve with opening and closing state indication and leakage blocking functions. 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 addition...

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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