DEVICE AND METHOD FOR COATING SURFACE GAP IN PIPELINE COVERING Russian patent published in 2017 - IPC B05B13/04 

FIELD: oil and gas industry.

SUBSTANCE: device for coating a surface gap in the covering of a pipeline, having a length in the direction of the central longitudinal axis of the pipeline and a width in at least a part of the circumference of the pipeline, comprises of a frame, a spray nozzle support member supporting a series of spray nozzles, a rectilinear movement mechanism and support elements. The support element of the spray nozzles supports a number of spray nozzles. The rectilinear movement mechanism is designed to move the support member of the spray nozzles relative to the frame and parallel to the longitudinal axis of the frame. The support elements are intended for fixed installation of the frame with respect to the pipeline with the longitudinal axis of the frame coinciding with the central longitudinal axis of the pipeline. When the support element of the spray nozzles is moved relative to the frame by means of the rectilinear movement mechanism, the spray nozzles are moved along the length of the surface part with spray nozzles oriented to the surface part. The device also comprises of a rotational movement mechanism for rotating the support member of the spray nozzles relative to the frame about the longitudinal axis of the frame. When the support member of the spray nozzles rotates relative to the frame about the longitudinal axis of the frame, the rotational movement mechanism ensures movement of the spray nozzles along the width of the surface part. The support element of the spray nozzles extends along the entire circumference around the longitudinal axis of the frame. A plurality of spray nozzles are distributed along the entire circumference. The spray nozzles are conical and arranged so that during their use the adjacent spray cones partially overlap. The method for coating a part of the surface of a covered pipeline comprises of the step of positioning the frame motionlessly relative to the pipeline. The frame has a support element of the spray nozzles attached thereto, on which a number of spray nozzles are arranged. The support element of the spray nozzles extends along the entire circumference around the longitudinal axis of the frame. A plurality of spray nozzles are distributed along the entire circumference. The spray nozzles are conical and arranged so that during their use the adjacent spray cones partially overlap. The method also comprises of the step of forced supply of the coating material through the spray nozzles. The support element of the spray nozzles is moved relative to the frame. The spray nozzles are moved in the first direction parallel to the longitudinal axis of the pipeline along the length of the surface part. The material forming the coating is applied to the surface area. Then, the support member of the spray nozzles is moved relative to the frame, so that the spray elements rotate about the longitudinal axis of the pipeline. Then, the material forming the coating is forced through the spray nozzles. The support element of the spray nozzles is moved relative to the frame. The spray nozzles are moved in the direction opposite to the first direction, along the length of the surface part. The material forming the coating is applied to the surface area. Under the method for coating a part of the surface of a covered pipeline, movement of the support element of the spray nozzles relative to the frame is such that the spray nozzles rotate back and forth around the longitudinal axis of the pipeline swinging. The spray nozzles are moved in a direction parallel to the longitudinal axis of the pipeline.

EFFECT: ensuring the possibility of applying the coating material in a controlled and accurate manner, increasing the part of the surface area to be coated and improving the protection against the ingress of the coating material into the environment of the device.

20 cl, 9 dwg