DEVICE FOR APPLICATION OF COATING ON INTERNAL SURFACE OF PIPES Russian patent published in 2011 - IPC B05C7/08 

FIELD: processing procedures.

SUBSTANCE: invention refers to devices for application of coating on surface, particularly, to application of protective and/or restoration coating on internal surface of pipes. The device consists of a case, of a pull cable, of an element for application of coating and of an element for distribution and removal of coating excesses. The hollow case has a coating inside and radial channels on top and a gripper on an upper end. The case travels inside a vertically set pipe upwards. The element for application of coating is made in form of an elastic sleeve filled with coating. Beneath the sleeve is communicated and connected with the case. The bottom of the sleeve is equipped with a control rod. An upper end of the rod with a connecting element is located above a level of coating. The element for application and removal of coating excesses is made in form of an elastic collar. This element is set outside the case below its radial channels. The element tightly interacts with internal surface of the pipe when the case travels in the pipe upwards. The pull cable has a catcher. The catcher engages a hold of the case when the case is introduced into the pipe and is extracted from it. The catcher engages the connecting element of the rod when the case is pulled through the pipe upwards.

EFFECT: simplified design, uniform application of coating.

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