Design of cleaning device
Problems to be considered in the design of the cleaning device: the first is the cleaning method, a variety of cleaning methods are compared, and finally the easy-to-achieve, high-efficiency, water-saving, cleaning effect is Can't walk, so install a long flexible brush roller on the cleaning device, use its friction with the roof to walk on the roof; the third is the control system, which uses wireless remote control, which is convenient for operation.
Mechanical structure
The most widely used glass greenhouse is the "human" roof. The cleaning device is divided into left and right sides, and the middle is hinged to fit the roof. The front and rear of the cleaning device each have a brush roller with a length equivalent to that of the body. When working, the two brush rollers rotate to drive the whole machine to walk on the roof, while the middle cleaning brush rotates to scrub the roof. There are sprinklers spraying water at the front and back of the device, the front is moistened and the roof is easy to clean, and the dirt is washed off at the back. Because there is a raised frame between each piece of glass on the roof of the glass greenhouse, the rotation of the brush will be blocked when passing by. Therefore, a brush lifting mechanism is designed. rise. During normal cleaning, the brush can also be controlled to rise and fall, and the pressure between the brush and the roof can be adjusted to achieve different cleaning effects.
Control System
The mechanical structure needs the coordination of the control system to successfully complete the cleaning work. Therefore, the design of the control system is also very important. According to the functions of the control system of the glass greenhouse roof cleaning device, the overall structure of the control system is drawn.
The feedback signal of the corresponding function is collected and fed back by the corresponding sensor, and the CPU processes and takes corresponding actions. The detection module for the top of the shed is composed of touch rods with Hall sensors installed before and after the cleaning device. When the top of the shed is reached, the touch rods are pressed down, so that the Hall sensors generate feedback signals. The walking synchronization detection module generates a feedback signal through the proximity switch sensor to sense the roof metal beam, and the CPU controls the walking motor to make corresponding actions according to the time difference between the feedback signals on both sides. The remaining modules use corresponding sensors, current sensors for current detection, and Hall sensors for position detection.
The cleaning device for the roof of the glass greenhouse has a simple structure, a high degree of automation, and a good cleaning effect. The three main influencing factors that affect the cleaning effect are analyzed by orthogonal experiments. Through the comparison of variance, range analysis and the average of the optimal combination, the priority order of the factors and the optimal combination are obtained. In the combination of various factors in the test, when the walking speed is 2.31m/min, the rotating speed of the disc brush is 97r/min, and the water spray rate is 9L/min, the cleaning effect and efficiency of the glass greenhouse roof is the best.
