Backwashing device of shellfish catcher

Abstract

The invention discloses a backwashing device of a shellfish catcher. The backwashing device comprises a filter screen installed between a left housing and a right housing of the shellfish catcher, the left housing of the shellfish catcher is fixedly connected to the right housing through a fastener, the right housing is provided with a drainage pipe, a driver is connected to the drainage pipe, a middle shaft is installed at the axis of the filter screen, a trapping pipe is installed on a part which is below the filter screen and fits to the filter screen, a trapping cavity is formed between the trapping pipe and the filter screen, the middle shaft and the trapping pipe are integrated and are communicated with each other and the tail end of the middle shaft is fixedly connected to the drainage pipe. The middle shaft and the trapping pipe are integrated so that reliability of connection of the middle shaft and the trapping pipe is greatly improved and a service life is prolonged. The backwashing device has a simple structure and is convenient for processing and installation.

Description

Technical field [0001] The invention relates to a shellfish trap, in particular to a shellfish trap with backwashing function. Background technique [0002] The shellfish trap is mainly used in the SEC safety plant water system of coastal nuclear power plants, as a pre-filter for heat exchangers, to prevent shellfish from adhering to subsequent equipment and causing damage to the equipment. At present, the shellfish traps used in nuclear power plants are mostly in the form of filter screens. Shellfish grow on the filter screens, and the filter screens are easy to be blocked, with poor filtering effect and short service life. [0003] The company has applied for a patent related to the shellfish trap, and the patent number is ZL201120385505.6. The technical solution disclosed in this patent adds a backwashing device on the basis of the screen type shellfish trap, but the capture in this patent The pipe and the central shaft are fixedly connected by connecting rods. During lo...

AI Technical Summary

Problems solved by technology

At present, the shellfish traps used in nuclear power plants are mostly in the form of filter screens. Shellfish grow on the filter screens, and the filter screens are easy to be blocked, with poor filtering effect and short service life.

[0003] The company has applied for a patent related to the shellfish trap, and the patent number is ZL201120385505.6. The technical solution disclosed in this patent adds a backwashing device on the basis of the screen type shellfish trap, but the capture in this patent The pipe and the central shaft are fixedly connected by connecting rods. During long-term use, it is found that this connection method is more likely to fail. When the sewage pipe drives the collecting pipe to rotate at high speed, centrifugal force is generated, and the connecting pipe is easy to break, which greatly reduces the Increased life of shellfish traps

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