Planetary gear transmission device of rotary valve

Abstract

The invention discloses a planetary gear transmission device of a rotary valve, and belongs to the technical field of quantitative analysis equipment. The device comprises a pipe clamping valve seat and a rotary valve seat, a seat body of the rotary valve seat is fixed to a seat body of the pipe clamping valve seat, and a planetary gear transmission assembly is arranged in the seat body of the rotary valve seat and composed of an input shaft, a handle, a sun gear, a limiting ring, an inner ratchet mechanism I, a planet gear, an inner gear ring, a connecting shaft, a planet carrier, a limitinghead, a pressing disc, a fixing piece, an inner ratchet mechanism II, an output shaft and a driving gear. According to the invention, the planetary gear transmission device of the rotary valve is reasonable in structural design; on one hand, the planetary gear transmission device can be effectively combined with a pipe clamping valve, so that the planetary gear transmission device has the advantages of the pipe clamping valve, and on-off adjustment and flow control to a certain extent can be achieved; and on the other hand, rapid closing and slow opening can be achieved, and the device can bewell suitable for quantitative analysis equipment.

Description

technical field [0001] The invention belongs to the technical field of quantitative analysis equipment, in particular to a planetary gear transmission device of a rotary valve. Background technique [0002] Pinch valve, also known as pinch valve, airbag valve, pinch off valve, etc. The sleeve is the most important part of any pinch valve and is the heart of the pinch valve, providing resistance to corrosion, wear and pressure. The quality of the pinch valve depends on the quality of the sleeve. When the pneumatic pinch valve does not input the control gas, the cavity between the rubber sleeve and the valve body is connected to the atmosphere, and the rubber sleeve is in a state of outward tension under the fluid pressure; because there are reinforced ply layers arranged at a certain angle in the sleeve, The axial and radial pressure of the pipe sleeve are balanced, so the length and diameter of the pipe sleeve will not change due to fluid pressure; when the control gas ent...

AI Technical Summary

Problems solved by technology

However, the pneumatic pinch valve has the problem that it can only be adjusted on and off, but cannot control the flow, so it is not suitable for quantitative analysis

[0003] In the prior art, manual rotary valves are often used in quantitative analysis equipment to achieve on-off adjustment and a certain range of flow control, but this type of rotary valve does not have the advantages of pinch valves, and its opening and closing speeds are the same, so it cannot achieve fast closing and Slow opening, not better suited for quantitative analysis equipment

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