Pipe temperature change test unit

Abstract

A pipe temperature change test unit comprises a solenoid valve I, a solenoid valve III, a water pump, a pressure valve and a thermal sensor. An output end and an input end of a water heater are respectively connected with the solenoid valve I and the solenoid valve III, wherein the other end of the solenoid valve I is provided with the water pump; the water pump is respectively connected with a solenoid valve II and the pressure valve; an output end of the pressure valve is provided with the thermal sensor; and a solenoid valve IV connected with a cold water outlet is arranged outside the solenoid valve III. The invention has the advantages that: the pipe temperature change test unit is convenient to operate, and contributes to improvement on product pass percent and test effect; in the test, cyclic change is carried out for 5,000 times under the pressure of (0.1+ / -0.01)MPa and at the temperature of (20+ / -5) DEG C and (93+ / -5) DEG C, the time for each cycle is (30+ / -2)min, and both cold water and hot water are kept for 15 minutes. When the outer diameter of a carbon steel pipe is more than 54mm, cyclic change is carried out for 2,500 times and the time for each cycle is (60+ / -2) minutes so that the connecting part avoids leakage.

Description

technical field [0001] The invention relates to a performance test device for pipe fittings, in particular to a pipe temperature change test device. Background technique [0002] Pipe fittings can be divided into four categories: socket fittings, threaded fittings, flanged fittings and welded fittings. The elbow is used for the turning position of the pipe, and the flange is used for the parts that connect the pipe to the pipe. Existing stainless steel clamping pipe fittings, stainless steel clamp joints and thin-walled stainless steel pipes for connection, after the production and processing are completed, a certain temperature testing device is required to ensure that the pipe fittings have good temperature performance and high-level product quality. If the existing crude detection means are used, the effectiveness cannot be guaranteed. Contents of the invention [0003] In view of the above defects, the object of the present invention is to provide a pipe temperature c...

AI Technical Summary

Problems solved by technology

Existing stainless steel clamping pipe fittings, stainless steel clamp joints and thin-walled stainless steel pipes for connection, after the production and processing are completed, a certain temperature testing device is required to ensure that the pipe fittings have good temperature performance and high-level product quality. If the existing crude detection methods are used, the effectiveness cannot be ensured

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