Pipe inner cavity pressure detector of evaporator

Abstract

The invention discloses a pipe inner cavity pressure detector of an evaporator. The pipe inner cavity pressure detector comprises a pressure meter, a seal pad, a needle head, a connection sleeve and a pipe cap, wherein the pipe cap is connected with an opening of a pipe of an inner cavity of the evaporator and is a rubber piece which forms a seal space with the pipe of the evaporator; the seal pad, the needle head and the seal pad are arranged between a joint of the pressure meter and the end surface of an inner hole of the connection sleeve, and the connection sleeve is in threaded matching with the joint of the pressure meter, so that the seal connection between the needle head, the joint of the pressure meter and the connection sleeve is realized. When the pipe inner cavity pressure detector is used, firstly the pipe cap is in sealed connection with the opening of the pipe of the inner cavity of the evaporator, air is filled in the seal space of the inner cavity of the evaporator to enable the seal space to be of the certain pressure, pressure preservation is kept for a while, a needle tip and a needle pipe are punctured into the pipe cap of the opening of the pipe of the inner cavity of the evaporator, and a pressure change situation of the inner cavity of the evaporator can be observed from the pressure meter, so that the seal performance of the inner cavity of the evaporator is judged. The whole detection operation is very quick, and the pipe inner cavity pressure detector is suitable for detecting the seal performance of the inner cavity during large-batch production of the evaporator.

Description

technical field [0001] The invention relates to a pressure detection device, and more specifically, the invention relates to a pressure detection device for an inner cavity of a pipe used in an evaporator. Background technique [0002] The inner cavity of the evaporator tube has certain sealing requirements. Now the following two methods are generally used to test the tightness of the inner cavity of the evaporator tube. One is to seal the inner cavity of the evaporator tube, inflate it, and then immerse the evaporator in water to observe Whether air bubbles are generated, so as to judge the tightness of the inner cavity of the evaporator tube, this method is more intuitive to detect, but the operation process is more complicated, and after being immersed in water, water may enter the inner cavity of the evaporator tube; the other It is necessary to use a pressure detection device. The pressure gauge is sealed and connected to the mouth of the evaporator tube cavity. If the...

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Problems solved by technology

[0002] The inner cavity of the evaporator tube has certain sealing requirements. Now the following two methods are generally used to test the tightness of the inner cavity of the evaporator tube. One is to seal the inner cavity of the evaporator tube, inflate it, and then immerse the evaporator in water to observe Whether air bubbles are generated, so as to judge the tightness of the inner cavity of the evaporator tube, this method is more intuitive to detect, but the operation process is more complicated, and after being immersed in water, water may enter the inner cavity of the evaporator tube; the other It is necessary to use a pressure detection device. The pressure gauge is sealed and connected to the mouth of the evaporator tube cavity. If there is no change, it means that the sealing of the inner cavity of the evaporator tube meets the requirements; if the pressure value displayed by the pressure gauge becomes smaller, it means that there is leakage in the inner cavity of the evaporator tube, and its sealing cannot meet the requirements. This method is better than the previous method. It is simple, but the pressure detection device needs to be sealed and connected to the inner cavity of the evaporator tube for each detection, and then the pressure is maintained for observation. In the detection of mass production of evaporators, a large number of pressure detection devices are required. This method detects The investment in tooling manufacturing is relatively large, and the regular verification cost of a large number of pressure gauges is also high

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