Intermediate discharging device structure improvement

2019 - intermediate discharging device structure improvement 02 - 10 Wang Fuhua ( Jiangsu hengyuan international engineering co. , LTD. ) Intermediate discharging device is also called the electric valve of turning, by rotating belt turning mechanism, electric draw stem and control system, etc, it is mainly used for bag packaging materials from one conveyor belt to the lower level in the process of conveying and vertical turn another conveyor belt conveyor, can make the bag to be delivered material automatic line. 1 intermediate discharging device structure forms and problems of a cement plant cement bags out of the packaging machine packaging workshop B650 tape after the intermediate discharging device into the car charger. Intermediate discharging device of the working face length of 1270 mm, pulley is installed on both ends of turning mechanism, four groups of the roller is uniformly distributed in the middle position, support and drive. Turning mechanism of conveyor belt for V groove ring belt, the main, driven pulley are nylon material, diameter & Phi; 195 mm, the high is 165 mm. Arrangement is shown in figure 1 ( Turning mechanism in 45 & deg; Position when the vertical) 。 Figure 1 intermediate discharging device layout because of the pulley and the vertical roller is fixed, the bottom has no fixed constraint, dangling placed, frequently in production is impacted by the cement bag, produces vibration, spindle parts easy clearance into the cement dust, pulley thrust bearings and the roller in rolling bearing damage easily; Nylon pulley strength is low, after the temperature tolerance clearance of bearing, is easy to cause the outer ring, resulting in the bearing and the pulley scrap; Driven wheel vibration and impact is bigger, in the end of the body more easily damaged than driving wheel. At present domestic annular belt is rubber products more, there is no middle canvas layer, and the thickness of the belt is not uniform, unable to bear large pulling force load. Combined with the area between the two sets of roller is impacted by the packet volatile, cause the belt are easily damaged, the service life of the average is about 3 months. The original structure and the damaged belt pulley as shown in figure 2. Figure 2 original structure and the damaged belt pulley 2 improvement measures and effect the pulley and roller unified into a structure ( See figure 3) 。 Figure 3 after the change of pulley and roller structure 1) To improve the pulley material. In to meet the pulley bearing load cases try to reduce weight and material selection of low density high strength aluminum alloy, weight and nylon difference is not big, but higher surface hardness and abrasion resistance index. 2) Increase the roller diameter, from 90 mm & times; 160 mm to 130 mm & times; 200 mm, so that in the same number of cases, roller spacing. 3) Improved pulley and roller surface structure, by slotted into a smooth; To prevent the belt from falling wandering, USES the smooth convex arc structure; To eliminate the middle into the material influence, in the middle of the wheel body upper open a & Phi; 17 mm round hole, a collection of dust. 4) Belt to take the middle canvas flat belt, belt and roller contact area significantly increased, smooth operation, enhanced ability to withstand impact. Through adjusting device can increase belt allowable tension, to ensure that the roller and belt close contact, run more smoothly. The improved effect is improved markedly, while primary aluminum casting mould cost is high, but in the operation of the service life is greatly increased, reduce the operation cost, normal can use more than one year. One year after accounting a device spare parts quantity, V groove belt takes about four, each 3500 yuan, a total of 14000 yuan, nylon pulley and the replacement of the bearing 2 & times; 5000 = 10000 yuan, four turn the valve spare parts amount is 96000 yuan a year, according to the analysis that can recover the investment costs.