Control signal dual-switch valve controller convenient to machine and steady in operation

Abstract

The invention relates to a control signal dual-switch valve controller convenient to machine and steady in operation, comprising a box body and a box cover, wherein the box body is internally and axially provided with a semi-circumference gear worm wheel which is in normal running fit with a worm arranged at the inner upper part of the box body, a control signal dual-switch is arranged at the inner lower part of the box body, and a worm wheel axle hole is formed at the center of the worm wheel. The controller is characterized in that limiting jackscrews are correspondingly arranged at two sides of the box body, a circumferential unsealed limit slot is formed in the radial center of the semi-circumferential gear worm wheel, the limiting jackscrews are limited in the circumferential unsealed limit slot, cam slots are formed at two sides of the circumferential unsealed limit slot, cams matched with the control signal dual-switch are machined on the cam slots, the worm wheel axle hole is circular, a stepped platform is arranged at the central position of the worm wheel axle hole, and a cylindrical worm wheel shaft matched with a key slot of the worm wheel axle hole is inserted into the stepped platform. The machining method and structure are simple, the strength is high, the structure is steady, damage of the worm wheel and the worm caused by overlarge torsion can be prevented, and the operation is steady.

Description

technical field [0001] The invention relates to a valve controller, in particular to a control signal double-switch valve controller which is easy to process and stable in operation. Background technique [0002] At present, valve controllers are widely used in industrial production and engineering construction and play a very important role. How to improve the performance of the worm gear and worm in the valve controller box, the direct cooperation between the control signal switch and the worm gear is one of the key links. The control signal switch of the existing valve controller is indirectly coordinated with the worm gear, and the control signal switch is usually set on the cover of the valve controller, which not only makes the matching precision of the control signal switch and the worm gear poor, but also affects the application performance of the valve controller; It will increase the overall volume of the box body, occupy a relatively large space during installati...

AI Technical Summary

Problems solved by technology

The control signal switch of the existing valve controller is indirectly coordinated with the worm gear, and the control signal switch is usually set on the cover of the valve controller, which not only makes the matching precision of the control signal switch and the worm gear poor, but also affects the application performance of the valve controller; It will increase the overall volume of the cabinet, occupy a relatively large space during installation and use, and easily cause inconvenience in installation and use; at the same time, there are many consumables in production, which increases production costs

Furthermore, the existing control signal switch is an ordinary switch, and it will be difficult to control the normal operation of the valve controller when a fault occurs

[0003] Now our company has developed a valve controller, which includes a box body and a box cover; the box body is equipped with a half-cycle gear and worm wheel in the axial direction, which cooperates with the worm screw on the upper part of the box body, and the lower part of the box body is equipped with a control valve. Signal double switch, the outer contour of the half-cycle gear and worm wheel is processed with a cam that matches the control signal double switch. This processing method is welding of the outer contour of the worm gear, which has poor strength, complicated processing, and unstable structure. Correspondingly, there is a positioning screw for controlling opening and closing. This positioning screw only acts on the control mechanism of the double switch of the control signal, and there is no protection for the inside of the half-cycle gear and worm wheel.

And the hole of the worm gear shaft is a square hole, and the front end of the worm gear shaft is also set as a square shape matching the square hole, and when the control torque is too large, the worm gear shaft drives the power output of the worm gear and the worm screw, so that the worm gear and the worm screw are damaged, and the valve controller operates been destroyed

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