Manufacturing method of silencer ventilating tube for ship

The utility model discloses a sound-absorbing ventilating cylinder for ships, comprising an outer cylinder body. The bottom position of the outer wall of the outer cylinder body is fixedly sleeved with connecting flanges, and the upper ends of the left and right sides of the inner wall of the outer cylinder body are symmetrically arranged with vertical directions. Sliding mechanism. Two sets of vertical sliding mechanisms are close to each other. An inner cylinder that penetrates the top of the outer cylinder is fixed on one side. A sound-absorbing wave ring is fixedly installed at the middle position of the inner wall of the inner cylinder. The lower end positions are all provided with fixed vertical plates, and the two sets of fixed vertical plates are both set at the lower positions of the two sets of vertical sliding mechanisms. The vibration generated by the ventilating fan in the sound-absorbing ventilating cylinder for ships is transmitted to the metal pipe fittings and produces a certain displacement. Because the metal rods and the fixed vertical plates are fixed on the inner wall of the outer cylinder body, the metal pipe fittings are displaced while driving the two sets of expansion and contraction. The spring generates elastic deformation and absorbs the shock force, thereby reducing noise and improving the sound-absorbing performance of the sound-absorbing ventilator for ships. The sound-absorbing performance. The sound-absorbing performance.

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