FIELD: pumps.
SUBSTANCE: group of inventions relates to an emulsion plunger pump and a pump head assembly. Assembly includes housing (101), fluid suction valve assembly (102), fluid delivery valve assembly (103), spacer assembly (104) and end cover (105). Housing (101) has hollow chamber (101a). Units (102), (104) and (103) are sequentially installed in chamber (101a). Assembly (102) includes seat (1021), core (1022) and first return spring (1023). Core (1022) is slidably connected to assembly (104). Spring (1023) is located between unit (104) and core (1022). Cover (105) is detachably connected to one end of housing (101). Assembly (104) comprises housing (1041) and sliding coupling (1042) rigidly connected to housing (1041). Housing (1041) contains an external bushing adjacent with a gap to the internal wall of chamber (101a), an internal bushing fitted with interference on coupling (1042), and a transition connecting part made with possibility of connection of the external and internal bushings. Seat (1021) is made in the form of a plate-like body with a through hole in the centre. Annular groove is formed on one side of the plate-like housing. External bushing is inserted into the annular groove.
EFFECT: group of inventions is aimed at providing a long service life.
7 cl, 8 dwg
