Anti-vibration spiral protection sleeve

Abstract

The invention discloses an anti-vibration spiral protection sleeve comprising a flange, a protective sleeve body and a spiral flange. Bolt holes are distributed in the flange in a circumferential direction; a central hole is drilled at the center of the flange; and the protective sleeve body passes through the central hole of the flange. The protective sleeve body is formed by combination of a spiral-flange-free sleeve and a spiral flange sleeve; and the spiral flange is arranged on the outer wall of the spiral flange sleeve spirally. A central drilling hole is formed at the center of the protective sleeve body. According to the anti-vibration spiral protection sleeve based on the reasonable structural design, since vibration of the protective sleeve is mainly caused by the Karman vortex street formed by the medium flowing through the protective sleeve in the rear side, the spiral flange around the protective sleeve can cut off the flow to avoid the obvious Karman vortex street. Because of reduction of the amplitude of the scattered vortexes, vibration of the sleeve is avoided; and with the spiral flange arranged at the spiral protective sleeve, the area of the contact medium of the protective sleeve is increased and the thermal conduction efficiency is increased, so that the temperature measuring element in the protective sleeve can measure the temperature precisely and the thermal response time is shortened.

Description

technical field [0001] The invention relates to the technical fields of oil refining and chemical industries, in particular to an anti-vibration spiral protective sleeve. Background technique [0002] In the oil refining and chemical industries, in order to prevent the protective casing of the thermometer measuring the medium in the pipeline from resonating and being damaged, the vibration frequency of the protective casing of the thermometer needs to be calculated according to ASME PTC 19.3 TW. With the continuous update of process technology, there are more and more high-flow environments, which leads to many protective sleeves failing to pass the above calculation. [0003] Defects of similar products: [0004] At present, the following three measures are mainly taken for the protective casing that cannot be calculated by the vibration frequency: [0005] 1. Shorten the length of the protective sleeve: This is the most effective way, but some measurement positions canno...

AI Technical Summary

Problems solved by technology

[0005] 1. Shorten the length of the protective sleeve: This is the most effective way, but some measurement positions cannot pass the calculation even if the sleeve is shortened to the shortest, and shortening the sleeve may cause the measuring element in the protective sleeve to not fully contact the medium, resulting in temperature measurement imprecise

[0006] 2. Increase the diameter of the protective sleeve: This method will increase the wall thickness of the protective sleeve and increase the conduction distance from the temperature of the measurement medium to the temperature measuring element in the protective sleeve, which may cause inaccurate temperature measurement and increase the thermal response time

Due to on-site construction factors, there will be angular offset and position offset when the equipment flange and piping are welded on site, and the supporting ring needs to be closely matched with the inner diameter of the piping to play a supporting role, so the supporting ring often needs to be polished on site, which is costly time consuming

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