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What is the manufacturing process for valve gearboxes?

Release date:

2021-11-05

How is a valve gearbox manufactured? Valve gearboxes typically use reduction gearing to amplify torque. For single-stage (two-speed) gear transmissions, the transmission ratio shouldn’t be too high, as this could lead to an excessively large size. If a higher transmission ratio—meaning greater torque amplification—is required, multi-stage gearing should be employed, resulting in a multi-turn valve gearbox.

        Valve Gearbox What is the manufacturing process like? Valve gearboxes typically use reduction gearing to amplify torque. For single-stage (two-speed) gear transmissions, the gear ratio shouldn’t be too high—otherwise, the gearbox would become excessively bulky. If a higher gear ratio (and thus greater torque amplification) is required, a multi-stage transmission should be employed, resulting in a multi-turn valve gearbox.

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　　The valve stem is a critical component of the valve gearbox, serving as the transmission element. It connects to either the actuator or the handwheel, directly driving the valve core to move or rotate, thereby enabling the valve to open, close, or adjust its function. Currently, in most multi-turn gearboxes, the valve stem is subjected to external forces during rotation, which easily leads to stem vibration and accelerates wear and damage to the stem. Additionally, as the valve stem rotates, it generates friction with the surrounding medium, causing significant wear over time.

　    The valve gearbox comprises a main housing, an auxiliary housing, and a valve stem. The main housing is connected to the left side of the auxiliary housing and is internally linked with it, while the valve stem passes through the interior of the auxiliary housing. Its innovative feature lies in the presence of a stabilizer positioned near the connection point between the valve stem and the auxiliary housing—this stabilizer is attached directly to the valve stem and extends outside the auxiliary housing. Additionally, a wear-resistant section is integrated into the middle portion of the valve stem.

　　Additionally, the stabilizing component consists of multiple right-angled triangles evenly connected around the valve stem, with the right-angle edges of the triangles resting directly against the valve stem.

　　Additionally, the wear-resistant section includes an inner groove and a wear-resistant ring. The inner groove is positioned in the middle of the valve stem, with external threads on both sides. The wear-resistant ring features internal threads that precisely match the external threads. The ring is securely fastened to the outer edge of the inner groove via a male-female threaded assembly. Furthermore, the wear-resistant ring is made from tungsten-chromium-cobalt alloy.

　　The advantages of valve gearboxes are:

　　1. The design of the valve gearbox stabilizer enhances the stability of the valve stem during rotation, reducing external damage to the stem. Additionally, the right-angle triangle creates a high-pressure zone near the auxiliary housing, which helps improve the valve's overall sealing performance.

       2. The valve gearbox features a wear-resistant section design that enhances the overall wear resistance of the valve stem, while the internal groove design helps reduce the stem's weight. Additionally, the use of a tungsten-chromium-cobalt alloy for the wear ring further improves the valve stem's durability.

　　The valve gearbox reducer pipe disassembler includes a base, multiple pull claws, claw retainers, and a jack. The base features a central fixing groove, with the bottom of the jack securely anchored inside this groove. The top of the jack is fitted with a copper cap, which presses against the valve stem inside the valve. On the side of the base, there are adjustment slots corresponding to the number of pull claws, each equipped with upper and lower holes. One end of each pull claw passes through an adjustment slot and is secured with a nut, while the other end is designed to grip the gearbox housing. The claw retainer consists of a central mounting frame and several supporting brackets, with each bracket firmly connected to the central frame. The number of brackets matches the number of pull claws.


 

 

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