Valve

Abstract

The invention discloses a valve. The valve comprises a valve body, a valve rod, a valve base and a valve core assembly; the valve core assembly is mounted in the valve body and comprises a valve core, the valve core is hinged to the valve body, and the valve core assembly further comprises a drive part, a positioning part and an elastic part; and the positioning part of the valve core assembly is mounted in the valve element in a relatively-moving manner, the elastic part is mounted between the positioning part and the valve element, and due to the engaging and disengaging matching relation between the riving part and the positioning part, the valve has three transmission relations in the closing process. The three transmission relations include the first transmission relation, the second transmission relation and the third transmission relation. According to the first transmission relation, the driving part and the positioning part are matched to form relative rest; according to the second transmission relation, the driving part extrudes the positioning part to enable the positioning part to do relative motion relative to the valve element; and according to the third transmission relation, the second transmission relation of the driving part and the positioning part is switched into the third transmission relation of the driving part and the valve element. The valve has the beneficial effects of being few in part, good in manufacturing technology, simple in structure, high in space utilization rate and the like.

Description

technical field [0001] The invention relates to a storage container, in particular to a valve. Background technique [0002] Existing valves for medium-sized bulk storage containers, such as butterfly valves, are opened by selecting the middle shaft of the valve core, which drives the valve core to rotate on both sides to open, because the valve core is generally located inside the valve body, and its flow is affected by the valve core and the shaft ; Poor sealing. Due to the friction between the sealing ring of the butterfly valve and the valve body, the force to open and close the valve is relatively large. [0003] Recently, a guide groove type lifting rod ball valve has been developed at home and abroad. There is an S-shaped guide groove on the valve stem, which cooperates with the guide pin, so that when the valve stem rises, it drives the ball away from the valve seat, and then rotates 90° counterclockwise to fully open the valve. When the valve stem is lowered, it d...

AI Technical Summary

Problems solved by technology

When the valve stem and the rotating disk rotate counterclockwise, under the forced action of the "brace" track on the rotating disk, the limit pin and the sealing structure of the valve first gather toward the center of the fixed disk according to the track of the "straight line" track on the fixed disk. , and then rotate counterclockwise according to the track of the "arc" track on the fixed plate, and the valve opens. The technical disadvantage of this patent is that it uses the track of "arc and straight line", which requires high precision and complicated processing technology. The valve core is a combination It is difficult to obtain a balanced pre-tightening force, resulting in damage to the valve core and shortening the life of the valve

[0005] A patent introduces an orbital plug valve, which includes a valve body, a valve cover, an operating part, a valve stem, a valve seat, a valve plug that forms a conical sealing pair with the valve seat, and an orbital mechanism. The orbital mechanism is installed on the The valve plug neck is composed of an orbital ring with two guide grooves and a double-pin plate with two guide pins pinned into the guide grooves, and also includes a lock nut and an adjustment ring for adjusting the installation position of the orbital ring. The disadvantage of this patent is The structure of the transmission device is complex, which greatly occupies the external space of the valve body; the transmission device involves many parts and the assembly process is complicated; in addition, due to the valve plug of the conical sealing pair, as well as the lock nut and the adjustment ring for adjusting the installation position of the orbital ring, It requires multiple adjustments, so the operation is complicated

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