Membrane filament leak detection device in PVDF hollow fiber membrane production

Abstract

The invention discloses a membrane filament leak detection device in PVDF hollow fiber membrane production. The device comprises a mounting table, wherein a U-shaped bin is mounted on one side of the top of the mounting table, injection needles communicated with the interior of the U-shaped bin are uniformly mounted on one side of the U-shaped bin, a nitrogen cylinder is mounted on one side, close to the U-shaped bin, of the bottom of the mounting table, the output end of the nitrogen cylinder communicates with the interior of the U-shaped bin, and a first rotating rod is arranged on the side, close to the U-shaped bin, of the top of the mounting table. According to the invention, through cooperative use of the auxiliary filament pressing assembly and the mounting table, an electric pneumatic cylinder is controlled to be shortened, so that each group of hollow fiber membrane filaments are clamped into corresponding annular grooves in two groups of second guide rollers respectively, the two groups of second guide rollers press the multiple groups of hollow fiber membrane filaments into maintenance water in a water tank, an operator does not need to stretch into water manually to place the hollow fiber membrane filaments at the bottom in the water tank, the operator can replace new hollow fiber membrane filaments conveniently, and the detection water in the water tank can be prevented from being polluted.

Description

technical field [0001] The invention relates to the technical field of hollow fiber membrane leak detection, in particular to a membrane thread leak detection device for PVDF hollow fiber membrane production. Background technique [0002] PVDF (polyvinylidene fluoride) has good resistance to chemical solvents and oxidants. It has been used as a production base material for the production of hollow fiber membranes. As a liquid separation membrane product, PVDF hollow fiber membranes can be used in water treatment, chemical industry In industries such as electronics, pharmaceuticals, etc., PVDF hollow fiber membranes used for filtration require not only certain mechanical properties and filtration flux, but also good integrity of the membrane filaments, that is, no defects and defects on the surface of the membrane filaments. Large pores, otherwise the filtration effect of the membrane module will be seriously affected. [0003] At present, when the membrane filaments in the ...

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Problems solved by technology

[0003] At present, when the membrane filaments in the production of hollow fiber membranes are leak tested, it is usually necessary to put each section of the hollow fiber membrane filaments into the water, and inject gas into the hollow fiber membrane filaments to detect the leakage of the hollow fiber membrane filaments, but It is often necessary to manually pass the hollow fiber membranes through the guide wheels in the pool so that each section of the hollow fiber membranes can always be in the water. When replacing a new set of untested hollow fiber membranes, the above operations need to be repeated , is very troublesome, and requires the operator to reach into the water for operation, which will also pollute the testing water, thereby reducing the practicability of the device; There are a lot of water droplets, if they cannot be removed in time, it will greatly affect the preservation of the hollow fiber membrane; at the same time, the hollow fiber membrane needs to be manually rolled up after the leak detection, which is very inconvenient and impossible Fast Winding of Hollow Fiber Membranes

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