Flow distributor assembly, valve box and plunger pump

A plunger pump, comprising a plunger, a diverter assembly,

• and a valve box, wherein both the plunger and the diverter assembly are mounted in an inner cavity of the valve box, the plunger is in transmission connection with a first valve body (210), and the diverter assembly comprises:
• a diverter assembly, and comprising a diverter (100), the first valve body (210), a second valve body (220), first valve rubber (310), and second valve rubber (320),
• wherein:
• the diverter (100) is provided with a liquid drainage hole (110) and a liquid inlet hole (120), the liquid drainage hole (110) is communicated with a first end surface and a second end surface facing away from each other of the diverter (100) in an axial direction of the diverter (100), the liquid inlet hole (120) is communicated with a side surface and the first end surface of the diverter (100), the side surface is connected between the first end surface and the second end surface, an orifice of the liquid inlet hole (120) located in the side surface is capable of being communicated with a liquid inlet channel of a valve box of the plunger pump, and an orifice of the liquid drainage hole (110) located in the second end surface is capable of being communicated with a liquid drainage channel of the valve box;
• the first valve body (210) is provided with a communication hole (211) penetrating through the first valve body (210) in the axial direction, the first valve body (210) is in openable and closable surface contact with the first end surface of the diverter to block the liquid inlet hole (120) and communicate the communication hole (211) and the liquid drainage hole (110) when closed, the second valve body (220) is in openable and closable surface contact with the second end surface of the diverter to block the liquid drainage hole (110) when closed;
• both the first valve rubber (310) and the second valve rubber (320) surround outside the liquid drainage hole (110), the liquid inlet hole (120) is spaced apart from the liquid drainage hole (110) through the first valve rubber (310), the first valve rubber (310) is capable of being pressed between the first valve body (210) and the first end surface, and the second valve rubber (320) is capable of being pressed between the second valve body (220) and the second end surface;
• and
• both sides facing away from each other of the orifice of the liquid inlet hole (120) located in the side surface in the axial direction are provided with sealing rings, a sealing loop is arranged on an outer side of each sealing ring on a periphery of the diverter, the sealing loop is hermetically arranged between the valve box and the diverter, the valve box is provided with a discharge hole, and an orifice of the discharge hole is communicated between the sealing ring and the sealing loop located on the same side of the liquid inlet hole.