Device and method for examining sealing performance of rubber hoses

Abstract

The invention discloses a device and a method for examining the sealing performance of rubber hoses. The device and the method aim to verify whether the requirement on improvement of the sealing performance of the rubber hoses can be met or not and to master fastening installation and connection conditions of the hose. The device for examining the sealing performance of the rubber hoses comprises an ageing oven and a sealing pipe; the sealing pipe is arranged in the ageing oven; a plurality of hose connecting seats are arranged on the sealing pipe, an air inlet pipe which partially extends out of the ageing oven is arranged on at least one of the various hose connecting seats, the rubber hoses are arranged on the other remaining connecting seats, and outer ends of the various rubber hoses are connected with second quick connectors; the outer end of the air inlet pipe is communicated with an air supply device; and the air inlet pipe is communicated with the sealing pipe and the rubber hoses. The device and the method have the advantages that pressure maintaining and high and low-temperature ageing examinations under severe running environmental conditions of locomotives can be simulated, and the rubber hoses which pass the examinations can assuredly meet reliability requirements of water cooling systems of locomotive products.

Description

technical field [0001] The invention relates to a rubber hose sealing performance testing device and testing method. Background technique [0002] High-power electric locomotive products use a water-cooling system, and a large number of rubber hoses are used in the product. Can the rubber hose satisfy the reliability of the electric locomotive product’s continuous sealing under certain water pressure and alternating high and low temperature cycles? This cannot be accurately judged without a long running test. The traction inverter produced by our company in the early stage used the blue Hutchinson rubber hose. When the locomotive was in operation for about a year, a large number of serious accidents occurred at the interface between the rubber hose and the quick connector or the water pipe joint. [0003] Taking the water cooling system of an electric locomotive as an example, the waterway connection between the water inlet pipe 1, the water outlet pipe 2, the heat exchange...

AI Technical Summary

Problems solved by technology

[0006] In actual use, after a long period of high and low temperature use, the rubber component of the rubber hose tends to lose its elasticity, and there is a gap between the inside of the rubber and the quick connector (or water pipe connector). When the locomotive is running, the water pump pumps the coolant to flow. water pressure, it is prone to coolant leakage problems

[0007] Due to the above-mentioned waterway system, the blue Hutchinson water pipe has a lot of leakage problems during the operation of the product. The main reason is that the rubber hose is aged after high and low temperature use. After the clamp is removed, the outer layer of the rubber hose and the inner layer The rubber has undergone a serious shape change, the rubber loses its elasticity and cannot achieve the sealing effect

Images