Internal pressure type sleeve compensator provided with composite external safety casing pipe

Abstract

The invention relates to an internal pressure type sleeve compensator provided with a composite external safety casing pipe. The internal pressure type sleeve compensator comprises a left core pipe, aright core pipe, a left corrugated pipe, a right corrugated pipe and a flow guide pipe. The left core pipe is connected with the left corrugated pipe. The right core pipe is connected with the rightcorrugated pipe. The left corrugated pipe is connected with the right corrugated pipe. The flow guide pipe is arranged in an inner cavity from the left core pipe and the right core pipe. The peripheries of the left corrugated pipe and the right corrugated pipe are provided with the outer casing pipe. The left end of the outer casing pipe is connected with the left core pipe, and the right end of the outer casing pipe is connected with the right core pipe through a sealing device. The sealing device comprises a padding ring, sealing padding and a padding gland flange. The outer casing pipe of the compensator is good in axial stability, the compensator cannot be twisted, and even if the corrugated pipes fail due to fatigue and leakage happens, the outer casing pipe of the compensator can achieve a good sealing effect. By means of the internal pressure type sleeve compensator provided with the composite external safety casing pipe, the sealing performance of the compensator is improved, reliable sealing of the compensator can be maintained for a long time, and the maintenance-free purpose is achieved. By means of the internal pressure type sleeve compensator provided with the composite external safety casing pipe, leakage is not likely to happen, the service life is long, the maintenance cost is low, and work is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of pipeline compensators, in particular to an internal pressure sleeve compensator provided with a composite external insurance sleeve. Background technique [0002] At present, when the heat pipe network transports high-temperature media such as hot water and steam, the bellows sleeve compensator is generally used to compensate the displacement of the pipe due to the expansion and contraction of the pipe due to the influence of the temperature of the medium. Because the displacement of the compensating pipe is compensated by the expansion and contraction of the bellows, the compensation capacity of the sleeve compensator is limited by the structure. The inner wall of the compensator bears the pressure of the medium, and the sealing packing cannot maintain a good sealing state for a long time, which is prone to leakage. [0003] Most bellows compensators work in the internal pressure type. After the medium i...

AI Technical Summary

Problems solved by technology

When the pipe expands or contracts due to thermal expansion and cold contraction, the bellows will be subjected to stretching or compression force, and the pressure on the inner wall of the bellows will easily cause the compensator to twist

During long-term use, due to the large amount of expansion and contraction produced by the heating pipe and the large wave number of the bellows, the bellows of the compensator are prone to leakage due to fatigue. Once the internal pressure bellows leaks, the entire compensator will fail

Therefore, it is necessary to maintain or replace the pipeline compensator regularly, resulting in a short service life of the compensator, a large workload of maintenance and replacement, and high cost

Sometimes due to failure to detect leaks and failed compensators in time, safety production accidents occur

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