| 摘要 |
A hose has an internal longitudinal channel in its sidewall as a safety device, to provide a prompt indication of impending failure or leakage into or out of the hose. A hose pump featuring such a hose is an improvement over conventional peristaltic pumps. A squeezing member constricts the hose to move a conveyed product along the hose, thereby causing wear on the hose. Such wear usually manifests itself first as a leak through an inner liner of the hose into the channel. The entrance of conveyed product into the channel, which can be detected by a change in pressure or electrical conductivity, is used as an indicator for wearing out of the hose. The use of such a hose minimizes release of hazardous conveyed materials from the hose into the environment or contamination of conveyed sensitive materials such as foodstuffs by the surrounding environment.
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