| CPC F16J 15/3284 (2013.01) | 16 Claims |
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1. A reciprocating pump comprising:
a first manifold including a cylinder portion;
a second manifold connected to the first manifold, which includes a pump chamber;
a communicating pipe including a first end located in the cylinder portion of the first manifold and a second end located in the pump chamber of the second manifold, wherein the communicating pipe fluidly couples the pump chamber to the cylinder portion;
a plunger which is located in the cylinder portion and moves in a reciprocating manner in an axial direction in the cylinder portion; and
a seal structure located in the cylinder portion, the seal structure including:
an annular first adapter that surrounds the plunger;
an annular second adapter that surrounds the plunger; and
an annular packing located between the first adapter and the second adapter in the axial direction and contacts an outer peripheral surface of the plunger,
wherein the first adapter and the second adapter sandwich the packing in the axial direction,
wherein an inner diameter of the first adapter is smaller than an outer diameter of the plunger,
wherein the first end of the communicating pipe contacts the second adapter in the axial direction,
wherein the cylinder portion comprises an annular protruding stepped portion that protrudes toward an axis of the cylinder portion from an inner periphery of the cylinder portion, and
wherein the first end of the communicating pipe and the protruding stepped portion of the cylinder portion sandwich the seal structure in the axial direction.
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