Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
  • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/0077—Safety measures
  • F04D15/0083—Protection against sudden pressure change, e.g. check valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
  • F04D29/606—Mounting in cavities

Definitions

• This invention relates to pump mounting systems and, more particularly, to an apparatus for removably mounting a pump in an industrial filtering system without the use of tools.
• settlement tanks containing filters are widely used to separate machine tool chips and other contaminants, referred to as swarf, from coolant so that clean coolant may be returned to the machine tools for reuse.
• swarf machine tool chips and other contaminants
• Such tanks are set below elevation such that sluiceways, likewise located below elevation, convey the contaminated liquid and machining chips to the settlement tank.
• the chips settle to the bottom of the tank and a dragout conveyor system is employed to convey the chips and swarf from the tank for removal, conventionally up a ramp located at one end of the tank.
• Filters are employed in the tank to separate the smaller chips and other contami ⁇ nants from the coolant.
• This system uses one or more horizontally disposed filter drums located adjacent the bottom of the tank. A suction is provided to the interior of the filter drum to pull coolant through the filter element. Filter cake, comprised of small chips and other contaminants, is thus formed on the outside of the drum surface.
• the drum is periodically indexed to enable a doctor blade to shave off a portion of the accumulated filter cake, which drops to the bottom of the tank for removal by the dragout conveyor.
• a clean coolant tank is also provided in the tank for receiving the clean coolant filtrate.
• centrifugal pumps are used, such as horizontal split case, end suction, and self-priming types
• one embodiment of such a filtration system uses one or more vertical turbine-type pumps. These pumps are disposed in the clean coolant tank for applying suction to the interior of the filter drum(s) , as well as for supplying clean coolant to a header for return to the machine tools.
• these vertical turbine pumps each typically comprise an elongated casing connected at its lower end with one or more impeller stage(s) for pumping clean coolant filtrate upwardly through the elongated casing.
• the impeller stages of each pump are driven by an electric motor mounted at the top of the casing above the liquid level in the tank. The motor drives the impellers by a central drive shaft which extends the length of the casing through multiple bearing assemblies supported by the casing.
• the lower end of the pump is received in a receptor ring located to enable the pump suction to connect through a suction chamber to the interior of the filter drum(s) .
• the outlet for each vertical turbine pump is located above the coolant level of the filtra- tion tank and above the tank itself and is connected to a header into which the clean coolant is discharge for return to the machine tools.
• each vertical turbine pump may have a height of 20 feet or more. To remove such pump from an operating position in a tank below working level, sufficient headroom above the filtration tank must be provided to accommodate the entire height of the pump.
• these vertical turbine pumps are quite expensive to manufacture and are usually custom- built to meet individual application needs. They also require lubrication, which frequently necessitates use of costly automatic lubricators, and customarily have multiple bearings and other ancillary equipment neces ⁇ sary to support their elongated drive shafts. Further, the motors require cooling and lubrication and produce substantial noise.
• improved apparatus allows a pump to be readily and easily removed from and rein ⁇ stalled in a coolant tank without requiring tools to do the job.
• Another object of the invention is to provide a mounting apparatus that requires less machining than earlier mounting arrangements.
• a more specific object of the invention is the improvement of reducing the number of contact regions in an apparatus.
• Apparatus for use with a pumping system including a receptor adapted to receive liquid from a source, a discharge conduit, and a pump including an inlet port, a discharge head and an impeller rotatable about an axis for pumping liquid from the receptor to the discharge conduit and removably mounted with respect to the discharge conduit and the receptor for servicing or replacement of the pump.
• the improvement comprises a substantially permanently stationary pipe column which extends from the receptor to the connector and includes a first end for removably receiving and freely suspend- ably mounting the pump.
• the pipe column also includes a second end in liquid flow communication with the inlet port and may include a check valve between the pump inlet port and the source of liquid.
• the first end includes a housing substantially permanently connected to the discharge conduit connector for liquid flow communication with the housing.
• the housing defines, in part, with the means carried by the pump discharge head, a chamber in liquid flow communica ⁇ tion with the connector when the pump is received in the first end whereby liquid may be discharged into the discharge conduit.
• the second end defines an inlet passageway in telescopic slip-fit support relation with the receptor for liquid flow communication with the supply source and support of the pipe column, whereby the liquid may be pumped from the supply source through the discharge conduit, when the pump inlet port and impeller are freely suspendably mounted in the pipe column.
• FIGURE 1 is a fragmentary longitudinal cross- sectional view through a filtration tank illustrating, in elevation, a pump mounting apparatus for facilitating the removal of the pump when constructed in accordance with the present invention and installed in operative position in the tank;
• FIGURE 2 is an exploded perspective view illustrating the pump mounting apparatus of Figure l;
• FIGURE 3 is a fragmentary cross-sectional view from the rear and partly in elevation illustrating the pump mounting apparatus of Figure 1 in operative posi ⁇ tion in a clean coolant compartment of the tank;
• FIGURE 4 is an enlarged fragmentary cross- sectional view of the pump mounting apparatus of Figure 1 illustrating how the pump is installed for easy removal from the tank;
• FIGURE 5 is an enlarged fragmentary cross- sectional view similar to Figure 3 illustrating my earlier improved pump mounting system.
• a pump and mounting for a filtration system constructed in accordance with the present invention is generally indicated by reference numeral 10 and are used in connection with a settling tank 12 set into a pit disposed below the floor level or elevation F in an industrial environment.
• the pump mounting arrangement 10 is illustrated for use with a filtration system, it is also adaptable to other fluid handling systems where pumps are utilized and require easy servicing.
• pump mounting 10 allows for drop in fitting of a pump, generally designated P, into a filtration system without the use of tools and eliminates prior art concerns with pump alignment.
• a motor, designated M is connected to and operable for running the pump P.
• tank 12 is gener ⁇ ally rectilinear in configuration, but has a sloping end wall 14 for use in conjunction with a drag-out conveyor, schematically illustrated at 16.
• tank 12 is preferably comprised of two discrete compartments, a dirty or contaminated coolant compartment, designated 18, for receiving dirty coolant from sluiceways, not shown, in communication with machine tools, also not shown, and a clean coolant compartment 20 for receiving clean, filtered coolant from tank 18.
• a horizontally disposed drum filter 22 for filtering the dirty coolant, whereby clean coolant filtrate may be supplied to machine tools. More partic ⁇ ularly, a suction is drawn on the inside of the drum 22 by pump P of the present invention. Coolant in dirty filter tank compartment 18 thus passes through the drum filter 22 where filtered coolant is supplied by the pump P to the machine tools.
• the drag-out convey ⁇ or 16 is conventional in construction and serves to remove both solids, settled out from the coolant and filter cake removed from the filtered drum 22 by a doctor blade, not shown, both of which settle to the bottom of tank compartment 18.
• Clean coolant compart ⁇ ment 20 includes an elevated or false floor 24 above the lower tank wall bottom and which defines a.lower chamber 26 for receiving clean coolant from the suction side of drum filter 22 via conduit 28.
• a header or discharge conduit 30 disposed in clean compartment 20 is provided for communicating the clean coolant to the machine tools.
• clean coolant is supplied to the machine tools from the suction side of filter 22 by way of chamber 26, pump P and header 30.
• pump P is removable and has an inlet port 32, a discharge head 34, and an impeller 36 mounted for rotation about an axis for supplying coolant liquid from the inlet port to the discharge head.
• a means 38 carried by the pump discharge head 34 defines, in part, a chamber 40 for receiving the coolant to be discharged from the head 34.
• a pipe column 42 extends from a receptor 44 in the false floor 24 to a connector 46 on header or discharge conduit 30. Pipe column 42 includes a first end 48 for removably receiving and freely suspendably mounting pump P therein and a second end 50 in liquid flow communication with inlet port 32.
• the pipe column is substantially permanently stationary whereby to provide a readily accessible enclosure for facilitating the installation and removal of the pump by reducing and minimizing the alignment points between pump and enclosure.
• first end 48 includes a housing 52 connected to the discharge conduit connector 46 for coolant liquid flow communication therewith.
• Housing 52 defines, in part, with means 38 carried by the pump discharge head 34 chamber 40 in liquid flow communication with the connector 46 when pump P is received in first end 48 of the pipe column 42, whereby the coolant may be dis ⁇ charged into the discharge conduit or header 30.
• the second end 50 defines an inlet passageway in telescopic slip-fit support relation with the receptor 44 for liquid flow communication with the clean coolant com- partment 20 and support of the pipe column 42. Thereby the coolant liquid is pumped from clean coolant compart ⁇ ment 20 through discharge conduit or header 30 when the pump inlet port 32 and impeller 36 are freely suspend- ably mounted in pipe column 42.
• housing 52 includes an enclosure 54 for encompassing at least, in part, the pump discharge head 34 when pump P is mounted in pipe column 42.
• the pump discharge head 34 includes a pair of end walls 56,58 spaced along the rotational axis and, in part, defining the chamber 40 therebetween.
• End walls 56,58 in part, define means 38 carried by the end walls for engaging enclosure 54 such that the chamber 40 is defined, in part, by the enclosure and end walls thereby establish- ing liquid coolant flow communication between the discharge conduit or header 30 and inlet port 32 of pump P.
• Housing 52 has a radially inwardly directed abutment 60 for engaging the pump discharge head 34 and
• 0-rings 62,64 carried by end walls 56,58 at the location of the engagement of the discharge head with the abut- ment for sealing chamber 40 against leakage of coolant.
• Receptor 44 is supported on false floor 24 which, in turn, supports the pipe column 42.
• a check valve 66 is supported within the lower end of the pipe column above the false floor to prevent liquid coolant communication between lower chamber 26 and pipe column 42 when pump P is inoperable or removed. It can be readily appreciated that pump P, including inlet port 32, discharge head 34 and impeller 36, can be slip- fitted into and out of the filtration system by simple raising or lowering, as the case may be, because pump P is suspendably mounted in the first end 48 of pipe column 42.
• This mounting facilitates installation and removal of the pump P without connecting or disconnect ⁇ ing any parts requiring tools and provides only two contact or alignment regions between pump P and the pipe column 42 where O-rings 62 and 64 are in sealing engage ⁇ ment between end walls 56 and 58 and the circumscribing housing 52. Consequently, the impeller 36 is freely suspended in pipe column 42 and no mating tolerances are required.
• FIG. 5 of the drawings illustrates my earlier improved pump mounting arrangement wherein like reference characters refer to like parts.
• This pump mounting arrangement requires critical mounting connec- tions at the discharge head 34, and also at receptor 44, which has to be sized to receive an impeller of pump P.
• This sizing requires exacting machining.
• the critically of the mounting connections and such machining requirements have been eliminated by freely suspending a removable pump in a permanent pipe column in accordance with my improved mounting described herein.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=24048537

Family Applications (1)

Country Status (4)

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Citations (2)

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• 1991
  • 1991-04-26 CA CA 2080247 patent/CA2080247A1/en not_active Abandoned
  • 1991-04-26 JP JP50868691A patent/JP3150339B2/ja not_active Expired - Fee Related
  • 1991-04-26 EP EP91919014A patent/EP0563052A1/de not_active Withdrawn
  • 1991-04-26 WO PCT/US1991/002897 patent/WO1991016541A1/en not_active Application Discontinuation

Patent Citations (2)

Non-Patent Citations (1)

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