Leakage-Proof Contrivance for Upper Hood of Diaphragm Pump

Abstract

The present invention provides a leakage-proof contrivance for upper hood of diaphragm pump by modifying the vertical wall of the lower tiered brim in the tiered cavity of the conventional pump upper hood into a sloped wall. Thereby, when stacked assembly of sealing collar gasket, piston valve and diaphragm is inset into the tiered cavity of the pump upper hood in closely attachment manner, the sealing collar gasket will be slantwise squeezed and vertically deformed to produce normal outwards stress in both upwards and downwards manners. Thus, the sealing collar gasket can respectively inset in the pump upper hood and piston valve in much more closely attachment manner to block and prevent the pressurized water from leaking out of the diaphragm pump.

1 . A leakage-proof contrivance for upper hood of diaphragm pump comprises a motor with an output shaft, an upper hood chassis with plural screw bores disposed at peripheral thereof, three wobble roundels with each threaded bores therein, a diaphragm, three piston pumping disks with three tiered bores and three screws, a piston valve on a piston base, a pump upper hood with plural perforated holes disposed at bottom peripheral thereof, a sealing collar gasket, an anti-backflow plastic pad and three valvular roundels as well as plural bolts; wherein
 Said diaphragm, which is basically a triangle but all three angle tips are respectively rounded and entirely surrounded by an inner ring ridge and an outer rim ridge with outer lateral surface and a top surface, includes an annular sealing groove beset by the inner ring ridge and outer rim ridge, three evenly disposed radial ridged ribs, three evenly distributed piston pumping zones and three hollow shafts, wherein each said piston pumping zone is defined by two flanked adjacent radial ridged ribs and corresponding arc section of the inner ring ridge; and each said hollow shaft is disposed in each piston pumping zone with location relatively corresponding with each threaded bore in each wobble roundel, and Each said piston pumping disk is securely fixed in each corresponding piston pumping zones of the diaphragm respectively by each screw running through each corresponding tiered bore thereof;   Said piston valve, which is integrally molded on a piston base of angles-rounded triangular form with three orientating ridges to be securely positioned on the diaphragm, basically includes a central water discharge mount and three peripheral water inlet mounts, wherein said piston base, which is basically a triangle but all three angle tips are respectively rounded and entirely surrounded by an annular sealing ridge to beset in the corresponding annular sealing groove of the diaphragm, has a rim top surface over the annular sealing ridge; said water discharge mount, which is bowl-shaped profile disposed on the central top of the piston valve, has a central orientating hole and three grouped water discharge openings evenly distributed in three equivalent sectors; each said water inlet mount, which is integrally molded in partial-cut round shape in upside-down bowl-shaped profile in circumjacent contact the central water discharge mount, has a central orientating hole and plural water inlet vents evenly distributed in surrounding manner therein; each said orientating ridge, which is formed along the footing tangent line circumscribed both adjacent water inlet mounts, has an tangent surface;   Said anti-backflow plastic pad, which is made of soft elastic material with a top clover-like disk of plano-convex profile in divided three-leaved shape, has a central orientating pin downwardly disposed beneath the top disk so that the orientating pin can be inserted into the orientating hole in the water discharge mount of the piston valve with the three-leaved top disk thereof closely attach over three grouped water discharge openings in respective three sector;   Each said valvular roundels, which is made of soft elastic material with a top disk of plano-convex profile, has a central orientating pin upwardly disposed on the top disk so that the orientating pin can be inserted into the orientating hole in each corresponding water inlet mount with the top disk closely attach and block all water inlet vent in each corresponding water inlet mount so that a preliminary low-pressured chamber is created between each valvular roundel and each corresponding piston pumping disk with one connection end of the low-pressured chamber being inter-fluent with the water discharge openings in each corresponding water discharge mount;   Said pump upper hood, which is a hollow body with bottom open, has a water input orifice and a water output orifice respectively disposed on each opposed top peripheral thereof as well as plural perforated holes disposed at bottom peripheral thereof; wherein an inner tiered cavity internally including an internal lower tiered brim with a horizontal bottom surface and a vertical wall as well as an upper tiered brim with a horizontal bottom surface and a vertical wall is inwardly created from the opening side of the pump upper hood; an innermost annular pit is outwardly created from the internal top wall of the pump upper hood so that the horizontal bottom surface and vertical wall of the lower tiered brim can closely attach the top surface and outer lateral surface of the sealing collar gasket in match manner while the horizontal bottom surface and vertical wall of the upper tiered brim can closely attach the top surface and outer lateral surface for the outer rim ridge of the diaphragm in match manner; and an intensive high-pressured chamber is created by the internal space encompassed by the inner wall of the annular pit and the top surface of the water discharge mount in the piston valve when the bottom rim surface of the annular pit closely attach the upper rim surface of the water discharge mount in the piston valve;   Said sealing collar gasket, which is made of soft material in roughly angles-rounded triangular form, has a top surface, a bottom surface and an outer lateral surface; and   Said leakage-proof contrivance for upper hood of diaphragm pump is characterized in that the vertical wall of the internal lower tiered brim in the tiered cavity of the pump upper hood is modified into a sloped wall.   
   
   
       2 . A leakage-proof contrivance for upper hood of diaphragm pump comprises a motor with an output shaft, an upper hood chassis with plural screw bores disposed at peripheral thereof, three wobble roundels with each threaded bores therein, a diaphragm, three piston pumping disks with three tiered bores and three screws, a piston valve on a piston base, a pump upper hood with plural perforated holes disposed at bottom peripheral thereof, a sealing collar gasket, an anti-backflow plastic pad and three valvular roundels as well as plural bolts; wherein
 Said diaphragm, which is basically a triangle but all three angle tips are respectively rounded and entirely surrounded by an inner ring ridge and an outer rim ridge with outer lateral surface and a top surface, includes an annular sealing groove beset by the inner ring ridge and outer rim ridge, three evenly disposed radial ridged ribs, three evenly distributed piston pumping zones and three hollow shafts, wherein each said piston pumping zone is defined by two flanked adjacent radial ridged ribs and corresponding arc section of the inner ring ridge; and each said hollow shaft is disposed in each piston pumping zone with location relatively corresponding with each threaded bore in each wobble roundel; and Each said piston pumping disk is securely fixed in each corresponding piston pumping zones of the diaphragm respectively by each screw running through each corresponding tiered bore thereof;   Said piston valve, which is integrally molded on a piston base of angles-rounded triangular form with three orientating ridges to be securely positioned on the diaphragm, basically includes a central water discharge mount and three peripheral water inlet mounts, wherein said piston base, which is basically a triangle but all three angle tips are respectively rounded and entirely surrounded by an annular sealing ridge to beset in the corresponding annular sealing groove of the diaphragm, has a rim top surface over the annular sealing ridge; said water discharge mount, which is bowl-shaped profile disposed on the central top of the piston valve, has a central orientating hole and three grouped water discharge openings evenly distributed in three equivalent sectors; each said water inlet mount, which is integrally molded in partial-cut round shape in upside-down bowl-shaped profile in circumjacent contact the central water discharge mount, has a central orientating hole and plural water inlet vents evenly distributed in surrounding manner therein; each said orientating ridge, which is formed along the footing tangent line circumscribed both adjacent water inlet mounts, has an tangent surface;   Said anti-backflow plastic pad, which is made of soft elastic material with a top clover-like disk of piano-convex profile in divided three-leaved shape, has a central orientating pin downwardly disposed beneath the top disk so that the orientating pin can be inserted into the orientating hole in the water discharge mount of the piston valve with the three-leaved top disk thereof closely attach over three grouped water discharge openings in respective three sector;   Each said valvular roundels, which is made of soft elastic material with a top disk of plano-convex profile, has a central orientating pin upwardly disposed on the top disk so that the orientating pin can be inserted into the orientating hole in each corresponding water inlet mount with the top disk closely attach and block all water inlet vent in each corresponding water inlet mount so that a preliminary low-pressured chamber is created between each valvular roundel and each corresponding piston pumping disk with one connection end of the low-pressured chamber being inter-fluent with the water discharge openings in each corresponding water discharge mount;   Said pump upper hood, which is a hollow body with bottom open, has a water input orifice and a water output orifice respectively disposed on each opposed top peripheral thereof as well as plural perforated holes disposed at bottom peripheral thereof; wherein an inner simple cavity without tiered brim but having a horizontal bottom surface and an inner vertical wall is inwardly created from the opening side of the pump upper hood such that the height of the vertical wall in the simple cavity is slightly higher than the height of the outer lateral surface for the outer rim ridge so that the space encompassed by the horizontal bottom surface and vertical wall of the simple cavity is just big enough to accommodate the top surface and outer lateral surface of the outer rim ridge on the diaphragm to closely attach therein; an innermost annular pit is outwardly created from the internal top wall of the pump upper hood; and an intensive high-pressured chamber is created by the internal space encompassed by the inner wall of the annular pit and the top surface of the water discharge mount in the piston valve when the bottom rim surface of the annular pit closely attach the upper rim surface of the water discharge mount in the piston valve; and   Said sealing collar gasket, which is made of soft material in roughly angles-rounded triangular form, has a top surface, a bottom surface and an outer lateral surface;   Said leakage-proof contrivance for upper hood of diaphragm pump is characterized in that said simple cavity of the pump upper hood is modified into a simple cavity with a sloped wall in addition to the horizontal bottom surface and an inner vertical wall thereof such that one edge of the sloped wall abuts with the horizontal bottom surface while the other edge of the sloped wall abuts with the vertical wall respectively.