Vacuum loader with silencer base

A muffler assembly, comprising:

• a silencer base comprising a support housing;
• said housing defining an inlet port and an outlet port;
• and having
• an internal composite sound attenuating chamber;
• said composite sound attenuating chamber having a channel communicating with said ports for varying the direction and substantially reducing the noise of gases passing through said channel;
• and
• said composite sound attenuating chamber having a series of baffles within said channel for serial passage of said gases and composite acoustical means comprising sound insulating and absorbing material for dampening the noise of said gases passing through said channel.

A muffler assembly for use with a vacuum loader and the like, comprising:

• a silencer base comprising a support housing with a substantially planar, horizontal, pneumatic equipment-engaging support surface for supporting and abuttingly engaging pneumatic equipment comprising at least one member selected from the group consisting of a motor, vacuum pump, blower, and fan, said support surface providing a ceiling for said silencer base;
• said housing having a substantially horizontal floor for positioning upon a tangential cyclone of a vacuum cleaner loader, upright end walls extending laterally between said ceiling and said floor, and elongated side walls extending longitudinally between said ceiling and said floor;
• said ceiling defining an upwardly facing inlet opening in proximity to one of said end walls for ingress of air;
• one of said side walls defining a laterally facing outlet opening positioned adjacent the other end wall for egress of air, said outlet opening positioned substantially perpendicular to said inlet opening;
• said silencer base having an upright particulate laden gas compartment extending through said ceiling and said floor for annularly surrounding and accommodating an upright deflector section of said vacuum cleaner loader, said upright compartment including an upright particulate laden gas passageway positioned between said inlet and outlet openings and having a substantially circular cross section for passing influent particulate laden gases substantially upwardly through said deflector section of said vacuum loader;
• said housing having an internal composite sound attenuating compartment with a zigzag channel extending longitudinally between and communicating with said inlet and outlet openings for passing filtered dedusted air laterally in a zigzag flow pattern between said inlet opening and said outlet opening;
• said composite sound attenuating chamber cooperating with said support surface for substantially dampening vibrations and muffling noises emitted from said pneumatic equipment;
• said composite sound attenuating chamber having a an acoustical inner core and an outer shell, said acoustical inner core comprising a series of upright offset, cantilevered acoustical baffles, and said outer shell comprising sound insulating and absorbing material substantially covering said baffles, walls, ceiling and floor for dampening the sound of the filtered dedusted air as said filtered dedusted air passes through said zigzag channel;
• and
• said series of upright offset, cantilevered acoustical baffles comprising downward baffles and upward baffles, each of said downward baffles comprising an upper attached portion connected to and cantilevered from said ceiling and an unattached lower portion having a bottom spaced above said floor, each of said upward baffles comprising a lower attached portion connected to and cantilevered from said floor and an upper unattached portion having a top spaced below said ceiling, said downward baffles extending substantially downwardly from said ceiling to a level below the top of said upward baffles, said upward baffles spaced between said downward baffles and extending substantially upwardly from said floor to a height above the bottom of said downward baffles, and said downward and upward baffles comprising gas impervious lateral barriers extending laterally across and connecting said sides of said housing for substantially blocking and deflecting longitudinal flow of filtered dedusted air and directing said filtered dedusted air between said baffles in said zigzag channel to substantially reduce the noise of said filtered dedusted air passing through said sound attenuating chamber.

A vacuum loader, comprising:

• a bin;
• a frame assembly providing a cradle for slidably receiving said bin, said frame assembly having a base, posts extending upwardly from said base, and a support platform secured to, positioned upon and extending laterally between said posts;
• a solids-gas separation compartment having a lower gross separation stage and an upper deflector stage, said lower gross separation stage being positioned below said support platform and containing a tangential cyclone, said upper deflector stage extending substantially upwardly from said lower separation stage to a position substantially above said support platform, said upper deflector stage comprising deflector means extending above and cooperating with said cyclone for partially dedusting a dust-laden stream of influent dusty air;
• an inlet conduit connected to and communicating with said tangential cyclone;
• a vacuum pump for drawing said influent dusty air through said inlet conduit into said tangential cyclone;
• a filtering compartment extending substantially upwardly from said support platform, said filter compartment having a separation stage and a filter stage;
• said separation stage of said filtering compartment having an overhead array of downwardly facing nozzles, said nozzles comprising a substantially circular set of nozzles to direct said partially dedusted air in a downwardly annular flow pattern about said filters in said separation stage;
• said filter stage containing a set of tubular filters spaced along side of each other for filtering said partially dedusted stream of air as said air moves laterally and radially inwardly through said filters to provide a substantially dedusted, upwardly flowing, purified stream of air;
• an intermediate conduit connected to and communicating with said solids-gas separation compartment and said nozzles for conveying said partially dedusted air from said solids-gas separation compartment to said nozzles;
• an outlet conduit connected to and communicating with said filter stage and said vacuum pump for passing said purified air from said filter stage to said vacuum pump;
• a silencer base mounted on said support platform above said tangential cyclone, said silencer base having a support housing with an upper substantially planar, horizontal, support surface for supporting said vacuum pump, said support surface providing a ceiling for said silencer base, said housing having a substantially horizontal floor for positioning above said tangential cyclone, upright end walls extending laterally between said ceiling and said floor, and elongated side walls extending longitudinally between said ceiling and said floor, said upper support surface of said housing defining an upwardly facing inlet opening in proximity to one of said end walls of said housing and communicating with said vacuum pump for ingress of filtered dedusted air from said vacuum pump, one of said side walls of said housing defining a laterally facing outlet opening positioned adjacent said other end wall of said housing for egress of said filtered dedusted air, said outlet opening positioned substantially perpendicular to said inlet opening;
• said silencer base having an upright particulate laden gas chamber extending substantially upwardly through said ceiling and said floor of said housing for annularly surrounding and positioning adjacent to said upper deflector stage of said solids-gas separation compartment, said upright particulate laden gas chamber being located between said inlet opening and said outlet opening;
• said silencer base having an internal composite sound attenuating chamber within said housing, said internal composite sound attenuating chamber having a zigzag channel extending longitudinally between and communicating with said inlet opening and said outlet opening for laterally passing said filtered dedusted air in a zigzag flow pattern between said inlet opening and said outlet opening, said composite sound attenuating chamber having an acoustical inner core and an outer shell, said acoustical inner core comprising a series of upright offset, cantilevered acoustical baffles, said outer shell comprising sound insulating and absorbing material substantially covering said baffles, walls, ceiling, and floor of said housing of said silencer base for dampening the sound of the filtered dedusted air as said filtered dedusted air passes through said zigzag channel;
• said composite sound attenuating chamber cooperating with said support surface of said silencer base for substantially dampening vibrations and decreasing noises emitted from said vacuum pump;
• and
• said series of upright offset, cantilevered acoustical baffles in said zigzag channel of said silencer base comprising downward baffles and upward baffles, each of said downward baffles comprising an upper attached portion connected to and cantilevered from said ceiling of said housing and an unattached lower portion having a bottom spaced above said floor of said housing, each of said upward baffles comprising a lower attached portion connected to and cantilevered from said floor of said housing and an upper unattached portion having a top spaced below said ceiling of said housing, said downward baffles extending substantially downwardly from said ceiling of said housing to a level below the top of said upward baffles, said upward baffles spaced between said downward baffles and extending substantially upwardly from said floor of said housing to a height above the bottom of said downward baffles, and said downward and upward baffles comprising gas impervious lateral barriers extending laterally across and connecting said sides of said housing for substantially blocking longitudinal flow of filtered dedusted air and directing said filtered dedusted air between said baffles in said zigzag channel to substantially reduce the noise of said filtered dedusted air passing through said sound attenuating chamber.