Piping structure, manufacturing system for processed food, method for conveying food, and method for manufacturing processed food

A piping structure for conveying food, the piping structure comprising:

• a first pipe to which the food is supplied;
• a plurality of second pipes provided downstream of the first pipe and connected to the first pipe in a conveyance direction of the food;
• and
• a plurality of third pipes provided downstream of the plurality of second pipes, at least two of the plurality of third pipes being connected to each of the plurality of second pipes,
• wherein each of the plurality of second pipes is connected to the first pipe via a first connecting pipe,
• the first connecting pipe includes a first connecting portion connected to the first pipe and a plurality of first curved portions that are provided downstream of the first connecting portion and that branch off from the first connecting portion,
• each of the plurality of third pipes is connected to the plurality of second pipes via a second connecting pipe,
• the second connecting pipe includes a second connecting portion connected to each of the plurality of the second pipes and a plurality of second curved portions that are provided downstream of the second connecting portion and that branch off from the second connecting portion,
• in a section taken along the conveyance direction of the food and taken along a direction parallel to a direction in which each of the plurality of first curved portions adjacent to each other extends when the plurality of first curved portions are viewed from upstream in the conveyance direction, a first merging portion where the plurality of first curved portions merges has an inner surface in a curved shape protruding upstream in the conveyance direction,
• in a section taken along the conveyance direction of the food and taken along a direction parallel to a direction in which one of the plurality of first curved portions extends when one first curved portion is viewed from upstream in the conveyance direction, the inner surface of the first merging portion has a curved shape protruding downstream in the conveyance direction,
• in a section taken along the conveyance direction of the food and taken along a direction parallel to a direction in which each of the plurality of second curved portions extends when each of the plurality of second curved portions is viewed from upstream in the conveyance direction, a second merging portion where the plurality of second curved portions merges has an inner surface in a curved shape protruding upstream in the conveyance direction, and
• in a section taken along the conveyance direction of the food and taken along a direction orthogonal to a direction in which each of the plurality of second curved portions extends when the second merging portion is viewed from upstream in the conveyance direction, the inner surface of the second merging portion has a curved shape protruding downstream in the conveyance direction.