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Qingzhou three dragon building materials equipment factory main products are: GP series roller suspension type reinforced concrete tube machine, ZY axial spinning cement tube machine, LP series centrifugal concrete tube machine, and vertical vibration of cement mill, etc four categories, more than 20 varieties.

 
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The detailed information :
The radial extrusion cement pipe equipment improvement scheme
The radial extrusion cement pipe equipment improvement scheme My company since the introduction of radial extrusion pressing pipe equipment, accumulated a lot of experience, and all-round improvement of cement tube machine, share these improvements come out now, hope to help cement pipe producers. Analysis of working components of rolling head, found that rapid wear iron ring, especially the upper part of it. If in the upper part of the role of the iron ring from the rolling wheel of squeeze through concrete ways to maximum pressure, then explains the rapid wear. In the process of forming 1200 mm diameter pipe, the determination of the extrusion and rolling wheel and the interaction between concrete properties. Using dynamometer as pressure sensors, pressure is measured with comprehensive measuring instrument, integrated instrument by strain amplifier, remember vibration system of library, resistance and power supply block. According to the proposed method along the mould pressure at different height measurement. At the same time in the record vibration system with dynamic pressure were recorded and rolling head turning spindle start and ascend. Know the dynamometer with regulation speed sliding relative to the rolling head position, and record the movement of the vibration system with speed, you can along the rolling wheel and the height of the iron ring, draw out the pressure profile. Use harsh concrete to molding pipe, each cubic concrete with shoes for: cement 500 kg, 1430 kg, 5 ~ 20 mm stone 300 kg. Without reinforcement concrete pipe) according to the following system forming, rolling head rotation speed is 36 r/min, the speed of 0.4 ~ 0.5 m/min. Noticed in the analysis of experimental data, the rolling pressure numerical value along the height of the pipe have very big difference. To clarify its regularity has important practical significance; It can answer why in radial extrusion tube, the socket part of concrete close-grained problem is often not enough. In the socket 0.2 MPa pressure produced by rolling head, seems to be enough to make harsh concrete gets a good squeeze. Bell mouth shape and increase socket wall thickness in column is complex, the problem on suspension of vibrator UB - 20 a (from below vibrator Ann to socket modules) vibration to supplement the tamping socket concrete, can guarantee required the compactness of concrete. In order to eliminate the defect, the cement tube machine installed a special water facilities, to feed on concrete spraying, in order to reduce the dry socket of forming concrete hardness. After the humidifying concrete by the rolling head and vibration compaction, can improve the quality of the socket. Research along the rolling head height effect in the mold on the distribution of dynamic pressure, found a bimodal the shape of a triangle, and the biggest stress in the center of the rolling wheel (0.4 ~ 0.5) and the upper part of the iron ring, and then gradually become smaller, to the roller at the bottom of the head actually dropped to zero. Upper part of the iron ring pressure mutations, can use concrete transition from crushed by rolling wheel to rotate pressed gt elastic aftereffect to explain. Pressure along the distribution characteristics of forming good tube body, also confirmed the iron ring galling characteristics along the height. Can conclude that the pipe inner surface sizing and ironing mainly rely on the upper part of the iron ring to complete, at the same time, it is violently wear, friction and heat that resulted in the so-called "overheating" in concrete surface, thus producing a lot of steam. The dehydration and stripping of broken wall can see concrete structures. Considering the results obtained, the iron ring into two section, the section not rotating aperture calibration (sizing) under section rotation for ironing, concrete rebound in the working process of the ironing pressure to a minimum. On the section along the springback stress for the greatest concrete and sliding, actually not wear not warm. The structure of the additional benefits are greatly reduce the torque of rolling head and prevent the distortion of the steel skeleton. We in the production of 800 mm, 1000 mm and 1200 mm diameter of the pipe, using improved rolling head, confirmed the validity of the structure, the use of the iron ring extended to 2000 tube, and the life of the roller head extends 7 ~ 10 times. In the process of using cement tube machine also found other shortcomings, these shortcomings make the application and maintenance difficulties, reduce the stability of cement tube machine and the quality of the pipe. For example, the rotation of the roller head drive structure is too complex, it is composed of motor, four transmission and coupling of triangle belt transmission activity bracket. This provides 800, 1000 and 1200 mm diameter pipe in molding, rolling head spindle revolutions corresponding to 84 r/min, 67, and 56, namely rolling head circumference speed to keep on a 3.5 m/s value. Has confirmed that when using a rolling head forming tube concrete compacted quality mainly depends on the role in concrete extrusion impulse number on unit length and squeezed the thickness of concrete. Within the scope of the 180 ~ 420 / impulse, extrusion of impulse frequency in impulse value equal, will not affect the compaction quality. Concrete per unit length on the extrusion impulse number, in the case of rolling head rotation speed is constant, change speed available to adjust. Thus concluded that can use a constant roller rotation of the head to the forming of different diameter tube, and this can give up complex level 4 transmission, greatly simplify the transmission mechanism of the rotation of the roller head. To switch to MP2-500 type motor transmission interlocking machine, power 90 kw, the output shaft speed of 70 r/min, cement tube machine after the transformation, using 4 years experience suggests that it is reliable and effective. It must be pointed out that the current factory in molding pipe rolling head speed slow down 20 ~ 30%, so that the concrete squeezing more compact and improve the uniformity of concrete. From the auxiliary console on the ground cement tube machine operation, repair, cleaning, and in doing other work, and drops to zero when the diameter of the pipe elevation, auxiliary replica of the console is 4 m above the floor console, it can simplify the cement tube machine operation, the control of the work, improve the quality of the pipe. The above news is compiled zheng, hope to have some help to you!
 
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