Freezing-thawing test machine with blowdown device

Abstract

The invention relates to a freezing-thawing test machine with a blowdown device. The freezing-thawing test machine comprises a test piece box, a control cabinet, a water tank, a cycle water pump and a refrigeration system. The control cabinet is disposed at the side of the test piece box, the refrigeration system is also disposed at the side of the test piece box, the water tank is disposed under the test piece box, the side wall of the test piece box is provided with a box body water inlet pipe, the bottom of the test piece box is provided with a box body water outlet pipe, the box body water inlet pipe and the box body water outlet pipe are communicated with the water tank through the cycle water pump, and the test piece box also comprises a filter tank which is disposed between the box body water outlet pipe at the bottom of the test piece box and the cycle water pump. By additionally arranging the filter box between the test piece box and the cycle water pump, water flowing out of the test piece tank need to firstly pass through the filter tank and then enter into the cycle water pump, thereby guaranteeing the cycle water pump not to be blocked and prolonging the service life of the cycle water pump.

Description

technical field [0001] The invention relates to concrete frost resistance test equipment, in particular to a freeze-thaw test machine with a sewage discharge device. Background technique [0002] In order to test the anti-freeze performance of concrete specimens, it is necessary to simulate the temperature change of the natural environment and test the concrete specimens, which is called a freeze-thaw test. The freeze-thaw test consists of multiple freeze-thaw cycles. The freeze-thaw cycle can be divided into many types according to different test requirements. The more typical one is to control the freeze-thaw cycle at 12 hours, which consists of the cooling stage (4 hours), the maintenance stage (3 hours), the heating stage (4 hours) ), holding phase (1 hour). The cooling stage requires time and temperature to change in a linear relationship, that is, within 4 hours, the temperature is uniformly dropped from 20°C above zero to minus 20°C, and then kept at minus 20°C for ...

AI Technical Summary

Problems solved by technology

However, during the freeze-thaw test, the water in the specimen box needs to be discharged or returned to the water tank through the circulating water pump. Since the concrete specimen has impurities, these impurities will return to the circulating water pump and the water tank along with the freezing-thawing water, which will last a long time. After a long time, it is easy to cause the circulating water pump to be blocked or even damaged, and the water tank is inconvenient to clean, and the impurities accumulated at the bottom of the water tank cannot be discharged, which will affect the service life of the circulating water pump and the entire freeze-thaw tester

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