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Utility Model Patent: A Winding Device with A Pneumatic Brake

Abstract

A winding device with pneumatic controller includes reel assembly mechanism, power reduction mechanism, rotary joint assembly mechanism, pneumatic control braking mechanism, torque limit and travel limit protection mechanism, pneumatic control components and electrical control mechanism. The utility model is an electric winding device which can effectively compress the product size by adjusting the air pressure and adjusting the braking torque. According to the working characteristics of the shield machine, when the winding device retracts the cable, the motor is powered on and drives the reel to drag the water pipe from the ground into the reel. When the winding device conducts cable laying, the motor loses power, and the water pipe is dragged out from the reel to the effective distance by external force. At this time, the air pressure can be adjusted by 0-0.8MPa, and the friction torque of the brake can be adjusted to easily drag the water pipe out. The utility model greatly meets the demand of the shield machine market, can comprehensively replace similar foreign products, and has the advantage that it is cost-effective.

Technical Field

The utility model relates to the winding device for a shield machine, in particular to the winding device with a pneumatic brake.

Background Art

With the continuously growing demand and high-end of China's mechanical equipment industry, so far, China's urban subway projects have an increasing demand for shield machines. Domestic shield machines have broken through foreign monopoly and most of them have been localized. Corresponding domestic manufacturers also have substitutes of the supporting water pipe drum. However, according to the actual working conditions of the shield machine, the water pipe drum with pneumatic control cable laying is still from foreign countries. The domestic manufacturers use the hysteresis water pipe drum instead. When the diameter of the water pipe is too large and the coiling length is too long, the coiling torque of the hysteresis water pipe drum is often insufficient. The product size is too large, which may be easily limited by the installation space of shield machine, which restricts the development of products.

Contents

The utility model aims to provide a winding device with a pneumatic brake to solve the problems in the background art.

The contents of the utility model is realized through the following technical solutions:

A winding device with a pneumatic brake includes reel assembly mechanism, power reduction mechanism, rotary joint assembly mechanism, pneumatic control braking mechanism, torque limit and travel limit protection mechanism, pneumatic control components and electrical control mechanism. The mentioned reel assembly mechanism is connected with the rotary joint assembly mechanism. The mentioned power reduction mechanism is connected with the pneumatic control braking mechanism.

The reel assembly mechanism comprises a reel outer ring, a reel inner ring, a reel drum, a drum support rod, a water pipe, a reel connecting flange, and the mentioned reel drum. The mentioned reel assembly mechanism is a cable storage device for winding the water pipe into the reel.

The power reduction mechanism comprises a main shaft, a single-row tapered roller bearing, a front end cover, a reduction gearbox assembly, a big bevel gear, a large bevel gear fixing flange, a three-phase AC asynchronous motor, a connecting flange, a planetary reducer, a gear gasket, a small bevel gear, a bearing transparent cover II, a shaft retaining ring II and a shaft sleeve. Because many shield machines are limited in the width direction of the drum, the selection of appropriate reduction ratio bevel gear in the power reduction mechanism can reduce the width of the reduction box.

The mentioned rotary joint assembly mechanism comprises a shaft retaining ring I, a right-angle joint, a deep groove ball bearing, a bearing transparent cover I, a bearing outer retainer ring, a rotary joint, a shaft seal ring, a hole retaining ring and steel pipe outer thread welding socket. When the water pipe drum works, the water pipe needs to be wound, and the water outlet of the drum must be connected into the equipment. The mentioned rotary joint assembly mechanism is a device to ensure the rotary conversion of the connecting part of the water pipe.

The mentioned pneumatic control braking mechanism comprises a friction wheel assembly and a pneumatic brake. The mentioned torque limit and travel limit protection mechanism comprises a main shaft sprocket, a travel limit switch and a torque limiter. In the pneumatic control braking mechanism, since the motor does not have an electromagnetic brake, a pneumatic control brake is installed between the motor output shaft and the planetary reducer. By manually adjusting the air pressure of 0-0.8MPa, the brake torque can be adjusted to the appropriate hinder torque, and the water pipe can be dragged out of the reel slowly by external force, which can ensure that the water pipe will not fall off due to gravity.

The pneumatic control components and the electrical control mechanism include an air filter with a pressure gauge, air pipes, a precision pressure regulating valve, a two-position three-way solenoid valve, a three-way quick connector, and an electric control box. For the mentioned torque limit and travel limit protection mechanism, when the winding device is winding the cable, the water pipe is inadvertently blocked by obstacles and cannot be winded into the reel. At this time, the excessive torque will break the water pipe. Therefore, a torque limiter is installed to ensure that the torque limiter slips and the appropriate output torque will not break the water pipe. When the water pipe reaches the end of the stroke, there should be more than one safety turn to set the travel limit. At this time, the travel limit switch sends a signal to cut off the power supply of the crane, so that the water pipe is not completely pulled out of the reel.

The front end of the friction wheel assembly is an output shaft inserted into the planetary reducer, the lower end of the output shaft of the planetary reducer is connected with a small bevel gear, the large bevel gear is connected with the main shaft through a key, the front and rear ends of the main shaft are equipped with reel connecting flanges, the reel and reel connecting flanges are connected through bolts, the reel is equipped with a rotary joint, and one end of the reel is connected with the water pipe. The pneumatic control components and the electric control mechanism are the actuator and the operating mechanism of the winding device.

The utility model has the following beneficial effects:

The utility model is a winding device with a pneumatic brake. It is an electric winding device which can effectively compress the product size by adjusting the air pressure and adjusting the braking torque. According to the working characteristics of the shield machine, when the winding device retracts the cable, the motor is powered on and drives the reel to drag the water pipe from the ground into the reel. When the winding device conducts cable laying, the motor loses power, and the water pipe is dragged out to the effective distance by external force. At this time, the air pressure can be adjusted by 0-0.8MPa, and the friction torque of the brake can be adjusted to easily drag the water pipe out. The utility model greatly meets the demand of the shield machine market, can comprehensively replace similar foreign products, and has the advantage that it is cost-effective.