Valve

Abstract

The invention discloses a valve, which comprises a valve body, a valve stem and a valve clack. The valve body includes a valve stem tube, a valve seat tube and a valve body cavity. The inner wall of the valve stem tube is provided with internal threads, and the outer wall of the valve stem is provided with external threads. , the valve clack is set on the top of the end of the valve stem extending into the valve body cavity, a connection hole is provided on the side where the valve clack is connected to the valve stem, a circle of card slots is provided on the top of the connection hole, and the top of the end of the valve stem and the valve clack is connected A pin hole is provided, and a spring is arranged in the pin hole, and cylindrical pins are arranged on both sides of the spring. Smaller than the diameter of the connecting hole of the disc. The valve clack of the present invention is manufactured separately, and after the spherical surface of the valve clack contacts the end surface of the round hole of the valve seat, it automatically adjusts the center, lowers the requirements for matching precision, and reduces the manufacturing cost. At the same time, the contact surface between the valve stem and the disc is small, and the operation is convenient and flexible.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a sealing valve with a split structure of a valve rod and a valve disc. Background technique [0002] In the prior art, the valve stem and the disc of the sealed valve are mostly integral structures, which require high machining accuracy and high-precision cooperation between related parts, so as to reduce the probability of internal leakage. Improvement will inevitably lead to a substantial increase in manufacturing costs. The valve disc at the head of the valve stem is in contact with the local inclined surface of the valve seat to seal. The head may not be aligned with the valve seat, resulting in poor sealing effect. At this time, when the valve stem and the valve seat are sealed, the two will rub against each other, requiring a lot of force to seal well, and the copper foam and chrome plating will fall off, resulting in a tight seal. The surface is damaged, and e...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the valve stem and the disc of the sealed valve are mostly integral structures, which require high machining accuracy and high-precision cooperation between related parts, so as to reduce the probability of internal leakage. Improvement will inevitably lead to a substantial increase in manufacturing costs. The valve disc at the head of the valve stem is in contact with the local inclined surface of the valve seat to seal. The head may not be aligned with the valve seat, resulting in poor sealing effect. At this time, when the valve stem and the valve seat are sealed, the two will rub against each other, requiring a lot of force to seal well, and the copper foam and chrome plating will fall off, resulting in a tight seal. When the valve is opened and closed, the valve disc and the valve seat rub against each other, the more times of opening and closing, the more wear and tear, the more serious the leakage, and the shortened service life

If the valve stem is controlled electrically or pneumatically, the related electrical or pneumatic devices are damaged

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