Pit filter

• Main Authors: LU YAN, PENG LEI, XU WEIJUN, SU JUNJIE, WANG JIANFENG, WANG SHAOHENG, REN FANGJUN
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2024
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention relates to a pit filter, and belongs to the technical field of pit filters. Comprising a confluence shell and a plurality of filter cartridges, one ends of the filter cartridges are fixedly installed on the confluence shell, each filter cartridge comprises an annular outer cartridge and an inner cartridge coaxially arranged in the outer cartridge, the interior of the outer cartridge is hollow and is provided with an annular first filter cavity, the interior of the inner cartridge is provided with a columnar second filter cavity, and the inner wall of the outer cartridge and the outer wall of the inner cartridge are matched to form an annular water inlet cavity; filter holes communicated with the first filter cavity are formed in the inner wall and the outer wall of the outer cylinder, filter holes communicated with the second filter cavity are formed in the outer wall of the inner cylinder, and contraction structures are arranged on the filter holes; the contraction structure comprises an annula