The chain scraper is mainly composed of driving mechanism, main beam, central rotating support, guide cylinder, scraper system, slag hopper and flushing mechanism, articulated scraper, skimming board, skimming bucket, outlet triangle plate, scum baffle, control box and other components. The scum scraper skims the liquid surface from the center of the pool to the periphery of the pool and collects the scum in the hinge scraper area The main engine moves to the skimming bucket around the pool, scrapes to the skimming bucket through the hinge of the scraping rake, and discharges to the outside of the pool.
The chain scraper is a kind of suspended desilting equipment, which is suitable for the removal of sludge from the round primary sedimentation tank, secondary sedimentation tank and concentration tank in the water treatment project. The sedimentation tank is of concrete or steel structure, the bottom of the tank is slightly cone-shaped, and the center of the tank bottom is the sludge discharge bucket connected with the sludge discharge pipe. The working bridge is of concrete or steel structure. This equipment does not include the pool body and working bridge. The user can solve it by himself. Our factory can design and manufacture the steel structure pool body and working bridge for the user. The scraper is composed of rake frame, vertical shaft drive device and over torque safety device.
The tolerance between the bottom edge of the rake teeth and the pool bottom shall be 50mm ± 100mm. At the lower end of the vertical shaft, install the sliding bearing and nylon bushing above the sludge discharge bucket, and lubricate it with compressed water. The dg15 lubricating water pipe must be set, which is led to the bottom of the pool from the outside of the pool and buried at the bottom of the pool. The external surface of the water pipe cannot be higher than the surface of the pool bottom. It extends outside the mud hopper and connects with the pipe joint of the sliding bearing. Only when constant pressure water is introduced to ensure good lubrication, can the test run be carried out. During normal operation, it is also necessary to switch on the pressure clean water before start-up to keep the underwater bearing well lubricated. The centripetal bearing and thrust bearing components at the upper end of the vertical shaft are lubricated with grease, which is required to be well lubricated. During the test run, the whole machine shall run at no load for no less than 2 hours, and the operation shall be stable with noise below 80dB. The on load test run shall not be less than 24 hours.
The drive scraper is suitable for the mechanical discharge of large and medium-sized secondary sedimentation tanks. It can be divided into single peripheral drive and double peripheral drive according to the size of the pool diameter. Its function is basically the same as that of the drive scraper. It is mainly used in the primary and secondary settling tanks of large-scale (generally larger than 20 m) sewage plants. The bottom of the scraper (the proportion is generally less than 1.2 and not easy to harden). Generally, the upper part of the scraper is equipped with a scum (or foam) scraping system, which has the function of scraping, settling, scraping and floating. The process is generally the central water inflow, The surrounding water is discharged and the center is discharged with mud.