Central driving mud scraper and water treatment sedimentation tank

Abstract

The invention discloses a center driving mud scraper and a water treatment sedimentation tank. The center driving mud scraper comprises a sedimentation tank with a square section and a water tank hanging bracket erected at the top of the sedimentation tank, wherein a guide seat with a square section is fixedly mounted on the center of the bottom of the sedimentation tank; guide assemblies are symmetrically mounted at four corners of the guide seat in a central symmetry manner; a driving connecting rod is rotationally installed at the center of the top of the guide seat; a quadrilateral frame assembly with the same side length is arranged on the outer side of the guide seat; the side length ratio of the quadrilateral frame assembly and the guide seat is 2: square root of 2; and mud scrapingassemblies are fixedly installed at the two opposite corners of the quadrilateral frame assembly respectively, and each mud scraping assembly is of a telescopic structure composed of a plurality of cross arms. In the operation process of the sludge scraping assemblies, under the dual effects of extrusion force at the four corners of the guide seat and sludge resistance, the sludge scraping assemblies are driven to circularly move along the periphery of the sedimentation tank by utilizing the circular motion of the quadrilateral frame assembly; and the angle of each mud scraping plate is changed along with the movement of the mud scraping assemblies, so sludge at the bottom of the sedimentation tank is scraped cleanly.

Description

technical field [0001] The invention relates to the technical field of environmental protection water treatment, in particular to a center-driven mud scraper and a water treatment sedimentation tank. Background technique [0002] The sedimentation tank is an indispensable basic equipment in the production process of sewage treatment, waterworks, ore dressing, etc. It uses the principle of gravity settlement to reduce the flow rate of water in a large pool space to make it approach to a gentle layer. The flow of the flow allows the particles to settle freely and achieve solid-liquid separation. [0003] Whether the sludge discharge is smooth is directly related to the water purification effect of the sedimentation tank. When the sludge discharge is not smooth and the sludge is too much, it will seriously affect the water quality of the effluent. Bridge type mud scraper, central rotary mud scraper, and peripheral drive mud scraper are three commonly used mud removal equipment...

AI Technical Summary

Problems solved by technology

However, when the four-bar linkage mechanism composed of four rods rotates to the four corners of the square, due to the sudden increase in the radial distance, the secondary scraper arm of the parallelogram four-bar linkage mechanism will suddenly and rapidly protrude, and it will appear four times after one rotation. this speed jump

The uneven and fast sudden jump will make the rotary mud scraper run unevenly. First, it is easy to cause the sedimentation active mud layer to be disturbed, so that the activated sludge that has been collected at the lower part of the scraper will suddenly jump out and jump quickly, causing The dispersal of the aggregated activated sludge, the mud layer is chaotic, and there is less sedimentation sludge at the bottom scraped, which is not conducive to hanging the sedimentation sludge from the four corners of the square pool to the center of the bottom of the pool for discharge, thus affecting the effect and efficiency of mud-water separation

[0008] The Chinese invention patent with the application number 201510297588.6 discloses an automatic telescopic scraper arm of a mud scraper for regular polygonal sedimentation tanks. At the corner position, jamming is easy to occur. At the same time, since the automatic telescopic scraper arm and the fixed scraper arm on both sides belong to a separate structure, the working stability is poor, and the automatic telescopic scraper arm is easy to be damaged. Once repaired or replaced, the sedimentation tank needs to be stopped. Affects the water treatment efficiency of the entire sewage treatment plant

The entire mud scraper has a single single-sided metal frame and a fixed scraper arm cantilever beam structure. When the cantilever beam structure is subjected to great resistance in the sedimentation tank, especially when the four corners of the tank bottom face jamming, the beam structure is prone to fracture.

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