CA1172904A - Fluid driven reciprocating pump - Google Patents
Fluid driven reciprocating pumpInfo
- Publication number
- CA1172904A CA1172904A CA000388663A CA388663A CA1172904A CA 1172904 A CA1172904 A CA 1172904A CA 000388663 A CA000388663 A CA 000388663A CA 388663 A CA388663 A CA 388663A CA 1172904 A CA1172904 A CA 1172904A
- Authority
- CA
- Canada
- Prior art keywords
- pump
- housings
- chambers
- chamber
- manifold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An air driven double acting diaphragm pump has a main pump body and circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall. The outer wall has a radial chamber substantially tangential to the surface of the outer wall formed thereon, a circular diaphragm in each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber. A connecting rod extending through the main pump body co-axial with the pump housings connects the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings. A pilot valve assembly mounted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, and a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly controllably supply a fluid under pressure to the pump actuating chambers. All inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings communicate the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced-apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, in which check valve means formed in the upper and lower plates communicate the horizontal chambers with the common inlet and outlet chambers.
An air driven double acting diaphragm pump has a main pump body and circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall. The outer wall has a radial chamber substantially tangential to the surface of the outer wall formed thereon, a circular diaphragm in each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber. A connecting rod extending through the main pump body co-axial with the pump housings connects the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings. A pilot valve assembly mounted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, and a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly controllably supply a fluid under pressure to the pump actuating chambers. All inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings communicate the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced-apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, in which check valve means formed in the upper and lower plates communicate the horizontal chambers with the common inlet and outlet chambers.
Description
i ~729~4 BACKGROUND OF THE INVENTION
This invention rela~es to diaphragm pumps and, more particularly, relates to a double acting fluid pressure-actuated diaphragm pump.
Double acting fluid pressure-actuated diaphragm pumps are well known. U.S. Patent 3838946 discloses a diaphragm pump of this type wherein a connecting rod inter-connecting two spaced apart pump bodies with diaphragms actuates a valve system effec-tive to admit air under pressure alternatingly to the chambers of the separate pump bodies. Adjustment means are provided to control the amplitude of movement of the valve system.
U.S. Patents 3791768, 4021149, and 4247264 typify other known embodiments of fluid driven, double acting, reciprocating diaphragm pumps.
Air driven double acting diaphragm pumps provide a durable and reliable means of moving liquids and liquid-solid slurries in that the pumps generally are not sensitive to abrasive or corrosive slurries or to a wide range of viscosities of the liquid. However, most known pumps have relatively complex control valves for the supply of fluid such as air for controlled recipro-cal operation of the pair of separate pump bodies and frequently incorporate complex check valve systems for the ingress and egress of liquids and slurries to and from the pump. The con-trol and check valve systems often are mounted external and separate from the pump housing and, as a result, are prone to damage in the adverse environment of construction sites.
Also, conventional diaphragm pumps have the liquid inlets and outlets disposed perpendicular to the diaphragms permitting puncture of a diaphragm if an elongated article is transported by the pumped liquid into the pump housing.
~ ~72g~
SUMMA~Y OF THE INVENTION
The apparatus of the present invention is directed to an improved pump mechanism which incorporates a relatively simple check valve system for the flow of liquids and slurries to and from the pump while providing reliable operation. Liquids and slurries are introduced to the pump bodies in a direction parallel to the plane of each diaphragm to minimize damage to the diaphragms. Control and check valve systems are incorporated within or as part of the pump housing to simplify the structure and protect these component parts.
More particularly, the apparatus of my invention comprises a double acting fluid pressure-actuated diaphragm pump including, in combination, a main pump body, circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall, said outer wall having a radial chamber substantially tangential to the surface of the outer wall formed thereon, a circular diaphragm in each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber, a connecting rod extending through the main pump body co-axial with the pump housings connecting the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings, a pilot valve assembly moùnted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly for controllably supplying a fluid under pressure to the pump actuating chambers, an inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings for communication of the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced-apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, and check valve means formed in the upper and lower plates communicating the horizontal chambers with the common inlet and outlet chambers.
It is, accordingly, a principal object of the present invention to provide an improved pump structure which is simple and reliable in operation while permitting facile maintenance and replacement of component parts.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects of the invention and the manner in which they can be attained will become apparent from the following detailed description of the apparatus of the inven-tion, taken in conjunction with the accompanying drawings, in which:
Figure 1 is a perspective view of the pump apparatus of my invention;
Figure 2 is a longitudinal section taken through the valve housing along line 2-2 of Figure l;
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Figure 3 is a transverse section taken along line 3-3 of Figure l;
Figure 4 is a longitudinal vertical section taken along line 4-4 of Figure 3;
Figure 5 is a longitudinal section illustrating in more detail the pilot valve assembly actuated by the diaphragms; and Figure 6 is a sectional view illustrating in more detail the reversing valve which controls airflow to the pump chambers.
DESCRIPTION OF THE PREFERXED EMBODIMENT
With reference now to the drawings, the double acting air-driven diaphragm pump of my invention includes two circular pump housings 10,12 rigidly interconnected in coaxial relation-ship by connecting rod 14, shown more clearly in Figure 4.
Flexible diaphragms 16,18 co-extensive with pump housings 10,12 divide each of the pump housings into pump chambers 20,22 and pump actuating chambers 24,26. Connecting rod 14 interconnects the centres of diaphragms 16,18 by means of piston assemblies 28,30; each assembly comprising outer and inner plates 32,34 threaded onto shaft extensions 36 of rod 14. Piston assemblies 28,30 sandwich the diaphragms therebetween to maintain alignment of the diaphragms within their respective pump chambers while pro~iding actuating means for the control valve depicted by numeral 40, to be described.
Each of pump housings 10,12 comprises concavo-convex outer housing member 42 and frusto-conical inner housing member 44 joined together at their edges to continuously grip the peripheral edge 46 of each of diaphragms 16,18 by means of circumferential clamps 48, shown more clearly in Figure 1.
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Each of clamps 48 has a pair of diametrically opposed radial extensions 50 adapted to mate with each other for removable securement together by means of connecting means such as bolts 52. Inner housing me~bers 44 of the pump housings 10,12 are secured to flanges 54 of the pump central body 56 by means of bolts ~8 threaded into raised portions 60.
With particular reference now to Figures 1, 2 and 3, the flow system for ingress and egress of liquids and slurries to and from the pump comprises radial chambers 70,71 formed substantially tangentially to the curvature of the outer conve~-~
side face of each of outer housing 42 of pump housings 10,12.
Each radial chamber 70,71 has a flange 72 connected to manifold housing 74 at one end and terminates at the other end at the centre 76 of each of outer housing members 42.
Manifold 74 straddles both pump housings 10,12 and interconnects chambers 70,71. Transverse partition 78 formed centrally in manifold ~4 interacts with upper and lower valve seat plates 80,82 to divide the manifold into a pair of chambers 84,86. Lower valve seat plate 82 has a pair of spaced a~art circular openings 88,90 communicating inlet 92 in inlet housing 94, which is secured to the underside of manifold 74 by means of bolts 96, with chambers 84,86. Balls 98,100 are adapted to seat on openings 88,90, respectively, to effectively seal the said openings from the flow of liquid or slurry therethrough, as will be described. Upper valve seat plate 80 has a pair of spaced apart circular openings 102,104 which communicate outlet 106 with chambers 84,86 of manifold 74.
Balls 108,110 are adapted to seat on openings 102,104 in sealing relation. Outlet 106 is formed in outlet housing 112 which is bolted to the upper side of manifold 74 by bolts 114.
l i~290~
The travel of connecting rod 14 to the left, as viewed in Figure 4, draws piston assembly 28 and diaphragm 16 to the position illustrated such that the pressure in pump chamber 20 is reduced during travel of diaphragm 16 creating a suction in inlet 92 through conduit 70 of pump housing 10 and chamber 84 of manifold 74 whereby ball 100 is raised above inlet opening 90 and is retained in proximity of opening 90 thereabove by means of upstanding guides 120 (Figures 2 and 3). Pump chamber 22 in pump housing 12 is concurrently under pressure by travel of connecting rod 14 and diaphragm 18 to the left as viewed in Figure 4 such that liquid or slurry con~ained in chamber 22 is discharged from said chamber through conduit 71 and chamber 86 of manifold 74 by way of upper discharge opening 102 while ball 108 is lifted to free opening 102 by the flow of liquid material therethrough. The return of connecting rod 14 to the right as-viewed in Figure 4 will result in the closing of valve opening 90 by ball 100 and the discharge of material from pump chamber 20 through valve opening 104 as ball 110 is lifted clear of said opening. At the same time, pump chamber 22 will be under negative pressure causing ball 108 to seat on opening 102 while ball 98 is lifted clear of opening 88 to allow inflow of material through inlet 92 into pump chamber 22 by way of manifold chamber 86 and conduit 71.
With reference now to Figures 4 and 5, control or pilot valve 120 comprises a spool 122 having axially spaced apart enlarged cylindrical portions or lands 124,126 slidably mounted within cylindrical reversing valve chamber 129 formed by sleeve 130. Pusher rods 132,134 extend into pump actuating chambers 24,26, respectively, in sealing engagement through plugs 136 threaded into side walls 137,139 of central body 54. Each of i L7~9~
plugs 136 has an axial opening 138 extending therethrough and an O-ring 140 seated in recess 141 and retained by retainer clip 142 to provide an effective seal about rods 132,134 as the rods reciprocate. The pusher rods 132,134 are adapted to be abuttingly engaged by inner plates 34 of piston assemblies 28,30, as has been described.
Turning now also to Figure 6, a plug or reversing valve assembly 150 is located in valve housing 152 which is secured to central body housing 54 by bolts 154 (Figure 1). Threaded inlet 156 communicates a supply of air under pressure to the interior of housing 152.
Reversing valve assembly 150 comprises a spool 157 disposed within cylindrical reversing valve chamber 158 formed by sleeve 160. Spool 157 has end lands 161,162 and a central land 164 with diametrically reduced portions 166,168 between central land 164 and end lands 161,162, respectively. The lands 161, 162 and 164 are cylindrical for axial sliding movement in chamber 158. Removable end plates 170,172 close the opposite ends of chamber 158 and compressible washers 174,175 disposed adjacent end plates 170,172 seal the ends of sleeve 160.
Air under pressure supplied through supply inlet 156 flows from chamber 180 through conduit 182 (Figures 3 and 5) formed in upset portion 184 of housing 152 into central chamber 186 in central body 56 for flow through either of openings 188 or 190 in sleeve 130 dependent on the location of spool lands 124,126.
As viewed in Figures 4 and 5, spool 122 has been pushed to the left such that apertures 188 and 192 in sleeve 130 are open and in communication permitting air flow from central chamber 186 into diametrically reduced portion 129 between lands 124,126 and to chamber 194 and connecting conduits 196, 198 and 200 through i ~729~
central opening 202 in washer 174 to bias spool 157 to the right.
With reference now to Figure 6, spool valve 157 reverses to the position shown by ghost lines 157' such that air under pressure in chamber 180 now flows through opening 210 in sleeve 160 into the diametrically reduced portion 158 between lands 161', 164' and through aperture 212 in sleeve 160 into conduit 214 to pump actuating chamber 24. Diaphragm 16 and associated piston assembly 28 travel to the right, as viewed in Figure 4, to reverse the operation of the check valves within manifold housing 74.
The operation of the pump thus is reversed until diaphragm 16 and associated piston assembly 28 reaches the end of its travel at which time spool 122 is actuated by pusher rod 134 to the right (Figure 5) shown by ghost lines 122' such that land 124' blocks aperture 188 while opening aperture 192 to the atmosphere via chamber 220 and outlet 222. Apertures 190 and 224 are placed in communication through diametrically reduced portion 129' between lands 124',126' allowing air to flow from chamber 186 into chamber 226 and through conduits 228, 230 and 232 to central opening 234 in washer 175 to bias spool 157 to the left, as viewed in Figure 6, for repetition of the pumping cycle.
It will be understood that modifications can be made in the embodiment of the invention illustrated and described herein without departing from the scope and purview of the invention as defined by the appended claims.
This invention rela~es to diaphragm pumps and, more particularly, relates to a double acting fluid pressure-actuated diaphragm pump.
Double acting fluid pressure-actuated diaphragm pumps are well known. U.S. Patent 3838946 discloses a diaphragm pump of this type wherein a connecting rod inter-connecting two spaced apart pump bodies with diaphragms actuates a valve system effec-tive to admit air under pressure alternatingly to the chambers of the separate pump bodies. Adjustment means are provided to control the amplitude of movement of the valve system.
U.S. Patents 3791768, 4021149, and 4247264 typify other known embodiments of fluid driven, double acting, reciprocating diaphragm pumps.
Air driven double acting diaphragm pumps provide a durable and reliable means of moving liquids and liquid-solid slurries in that the pumps generally are not sensitive to abrasive or corrosive slurries or to a wide range of viscosities of the liquid. However, most known pumps have relatively complex control valves for the supply of fluid such as air for controlled recipro-cal operation of the pair of separate pump bodies and frequently incorporate complex check valve systems for the ingress and egress of liquids and slurries to and from the pump. The con-trol and check valve systems often are mounted external and separate from the pump housing and, as a result, are prone to damage in the adverse environment of construction sites.
Also, conventional diaphragm pumps have the liquid inlets and outlets disposed perpendicular to the diaphragms permitting puncture of a diaphragm if an elongated article is transported by the pumped liquid into the pump housing.
~ ~72g~
SUMMA~Y OF THE INVENTION
The apparatus of the present invention is directed to an improved pump mechanism which incorporates a relatively simple check valve system for the flow of liquids and slurries to and from the pump while providing reliable operation. Liquids and slurries are introduced to the pump bodies in a direction parallel to the plane of each diaphragm to minimize damage to the diaphragms. Control and check valve systems are incorporated within or as part of the pump housing to simplify the structure and protect these component parts.
More particularly, the apparatus of my invention comprises a double acting fluid pressure-actuated diaphragm pump including, in combination, a main pump body, circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall, said outer wall having a radial chamber substantially tangential to the surface of the outer wall formed thereon, a circular diaphragm in each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber, a connecting rod extending through the main pump body co-axial with the pump housings connecting the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings, a pilot valve assembly moùnted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly for controllably supplying a fluid under pressure to the pump actuating chambers, an inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings for communication of the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced-apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, and check valve means formed in the upper and lower plates communicating the horizontal chambers with the common inlet and outlet chambers.
It is, accordingly, a principal object of the present invention to provide an improved pump structure which is simple and reliable in operation while permitting facile maintenance and replacement of component parts.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects of the invention and the manner in which they can be attained will become apparent from the following detailed description of the apparatus of the inven-tion, taken in conjunction with the accompanying drawings, in which:
Figure 1 is a perspective view of the pump apparatus of my invention;
Figure 2 is a longitudinal section taken through the valve housing along line 2-2 of Figure l;
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Figure 3 is a transverse section taken along line 3-3 of Figure l;
Figure 4 is a longitudinal vertical section taken along line 4-4 of Figure 3;
Figure 5 is a longitudinal section illustrating in more detail the pilot valve assembly actuated by the diaphragms; and Figure 6 is a sectional view illustrating in more detail the reversing valve which controls airflow to the pump chambers.
DESCRIPTION OF THE PREFERXED EMBODIMENT
With reference now to the drawings, the double acting air-driven diaphragm pump of my invention includes two circular pump housings 10,12 rigidly interconnected in coaxial relation-ship by connecting rod 14, shown more clearly in Figure 4.
Flexible diaphragms 16,18 co-extensive with pump housings 10,12 divide each of the pump housings into pump chambers 20,22 and pump actuating chambers 24,26. Connecting rod 14 interconnects the centres of diaphragms 16,18 by means of piston assemblies 28,30; each assembly comprising outer and inner plates 32,34 threaded onto shaft extensions 36 of rod 14. Piston assemblies 28,30 sandwich the diaphragms therebetween to maintain alignment of the diaphragms within their respective pump chambers while pro~iding actuating means for the control valve depicted by numeral 40, to be described.
Each of pump housings 10,12 comprises concavo-convex outer housing member 42 and frusto-conical inner housing member 44 joined together at their edges to continuously grip the peripheral edge 46 of each of diaphragms 16,18 by means of circumferential clamps 48, shown more clearly in Figure 1.
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Each of clamps 48 has a pair of diametrically opposed radial extensions 50 adapted to mate with each other for removable securement together by means of connecting means such as bolts 52. Inner housing me~bers 44 of the pump housings 10,12 are secured to flanges 54 of the pump central body 56 by means of bolts ~8 threaded into raised portions 60.
With particular reference now to Figures 1, 2 and 3, the flow system for ingress and egress of liquids and slurries to and from the pump comprises radial chambers 70,71 formed substantially tangentially to the curvature of the outer conve~-~
side face of each of outer housing 42 of pump housings 10,12.
Each radial chamber 70,71 has a flange 72 connected to manifold housing 74 at one end and terminates at the other end at the centre 76 of each of outer housing members 42.
Manifold 74 straddles both pump housings 10,12 and interconnects chambers 70,71. Transverse partition 78 formed centrally in manifold ~4 interacts with upper and lower valve seat plates 80,82 to divide the manifold into a pair of chambers 84,86. Lower valve seat plate 82 has a pair of spaced a~art circular openings 88,90 communicating inlet 92 in inlet housing 94, which is secured to the underside of manifold 74 by means of bolts 96, with chambers 84,86. Balls 98,100 are adapted to seat on openings 88,90, respectively, to effectively seal the said openings from the flow of liquid or slurry therethrough, as will be described. Upper valve seat plate 80 has a pair of spaced apart circular openings 102,104 which communicate outlet 106 with chambers 84,86 of manifold 74.
Balls 108,110 are adapted to seat on openings 102,104 in sealing relation. Outlet 106 is formed in outlet housing 112 which is bolted to the upper side of manifold 74 by bolts 114.
l i~290~
The travel of connecting rod 14 to the left, as viewed in Figure 4, draws piston assembly 28 and diaphragm 16 to the position illustrated such that the pressure in pump chamber 20 is reduced during travel of diaphragm 16 creating a suction in inlet 92 through conduit 70 of pump housing 10 and chamber 84 of manifold 74 whereby ball 100 is raised above inlet opening 90 and is retained in proximity of opening 90 thereabove by means of upstanding guides 120 (Figures 2 and 3). Pump chamber 22 in pump housing 12 is concurrently under pressure by travel of connecting rod 14 and diaphragm 18 to the left as viewed in Figure 4 such that liquid or slurry con~ained in chamber 22 is discharged from said chamber through conduit 71 and chamber 86 of manifold 74 by way of upper discharge opening 102 while ball 108 is lifted to free opening 102 by the flow of liquid material therethrough. The return of connecting rod 14 to the right as-viewed in Figure 4 will result in the closing of valve opening 90 by ball 100 and the discharge of material from pump chamber 20 through valve opening 104 as ball 110 is lifted clear of said opening. At the same time, pump chamber 22 will be under negative pressure causing ball 108 to seat on opening 102 while ball 98 is lifted clear of opening 88 to allow inflow of material through inlet 92 into pump chamber 22 by way of manifold chamber 86 and conduit 71.
With reference now to Figures 4 and 5, control or pilot valve 120 comprises a spool 122 having axially spaced apart enlarged cylindrical portions or lands 124,126 slidably mounted within cylindrical reversing valve chamber 129 formed by sleeve 130. Pusher rods 132,134 extend into pump actuating chambers 24,26, respectively, in sealing engagement through plugs 136 threaded into side walls 137,139 of central body 54. Each of i L7~9~
plugs 136 has an axial opening 138 extending therethrough and an O-ring 140 seated in recess 141 and retained by retainer clip 142 to provide an effective seal about rods 132,134 as the rods reciprocate. The pusher rods 132,134 are adapted to be abuttingly engaged by inner plates 34 of piston assemblies 28,30, as has been described.
Turning now also to Figure 6, a plug or reversing valve assembly 150 is located in valve housing 152 which is secured to central body housing 54 by bolts 154 (Figure 1). Threaded inlet 156 communicates a supply of air under pressure to the interior of housing 152.
Reversing valve assembly 150 comprises a spool 157 disposed within cylindrical reversing valve chamber 158 formed by sleeve 160. Spool 157 has end lands 161,162 and a central land 164 with diametrically reduced portions 166,168 between central land 164 and end lands 161,162, respectively. The lands 161, 162 and 164 are cylindrical for axial sliding movement in chamber 158. Removable end plates 170,172 close the opposite ends of chamber 158 and compressible washers 174,175 disposed adjacent end plates 170,172 seal the ends of sleeve 160.
Air under pressure supplied through supply inlet 156 flows from chamber 180 through conduit 182 (Figures 3 and 5) formed in upset portion 184 of housing 152 into central chamber 186 in central body 56 for flow through either of openings 188 or 190 in sleeve 130 dependent on the location of spool lands 124,126.
As viewed in Figures 4 and 5, spool 122 has been pushed to the left such that apertures 188 and 192 in sleeve 130 are open and in communication permitting air flow from central chamber 186 into diametrically reduced portion 129 between lands 124,126 and to chamber 194 and connecting conduits 196, 198 and 200 through i ~729~
central opening 202 in washer 174 to bias spool 157 to the right.
With reference now to Figure 6, spool valve 157 reverses to the position shown by ghost lines 157' such that air under pressure in chamber 180 now flows through opening 210 in sleeve 160 into the diametrically reduced portion 158 between lands 161', 164' and through aperture 212 in sleeve 160 into conduit 214 to pump actuating chamber 24. Diaphragm 16 and associated piston assembly 28 travel to the right, as viewed in Figure 4, to reverse the operation of the check valves within manifold housing 74.
The operation of the pump thus is reversed until diaphragm 16 and associated piston assembly 28 reaches the end of its travel at which time spool 122 is actuated by pusher rod 134 to the right (Figure 5) shown by ghost lines 122' such that land 124' blocks aperture 188 while opening aperture 192 to the atmosphere via chamber 220 and outlet 222. Apertures 190 and 224 are placed in communication through diametrically reduced portion 129' between lands 124',126' allowing air to flow from chamber 186 into chamber 226 and through conduits 228, 230 and 232 to central opening 234 in washer 175 to bias spool 157 to the left, as viewed in Figure 6, for repetition of the pumping cycle.
It will be understood that modifications can be made in the embodiment of the invention illustrated and described herein without departing from the scope and purview of the invention as defined by the appended claims.
Claims
1. A double acting fluid pressure-actuated diaphragm pump comprising, in combination:
a main pump body;
circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall, said outer wall having a radial chamber substantially tangential to the surface of the outer wall formed thereon;
a circular diaphragm in each of said housings co-axial and co-extensive with the housings, each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber;
a connecting rod extending through the main pump body co-axial with the pump housings connecting the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings;
a pilot valve assembly mounted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, said pilot valve assembly including a spool slidably mounted within a cylindrical reversing valve chamber parallel to the connecting rod, a pusher rod co-axial and integral with the spool slidably mounted for projection into a pump actuating chamber at each end of the spool for sensing movement of a piston assembly and communicating said movement to the pilot valve assembly and sealing means for sealing engagement of the pusher rods in side walls of the main pump body, said sealing means each comprising a plug having an axial opening threadably mounted into a main pump body side wall, each said plug having an O-ring mounted within the axial opening for slidably receiving a push rod;
a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly for controllably supplying a fluid under pressure to the pump actuating chambers;
and an inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings for communication of the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, and check valve means formed in the upper and lower plates communicating the horizontal chambers with the common inlet and outlet chambers.
a main pump body;
circular pump housings disposed at opposite ends of the main pump body and rigidly secured thereto, said housings each having a frusto-conical inner wall and a concavo-convex outer wall, said outer wall having a radial chamber substantially tangential to the surface of the outer wall formed thereon;
a circular diaphragm in each of said housings co-axial and co-extensive with the housings, each of said housings having removable clamp means for securing the inner and outer walls together and continuously gripping the periphery of the diaphragm therebetween to divide the interior of each housing into a pump chamber and a pump actuating chamber;
a connecting rod extending through the main pump body co-axial with the pump housings connecting the diaphragms together at opposite ends of the rod for reciprocatory movement of the diaphragms in unison within the housings, each end of the rod having piston assemblies for alignment of the diaphragms within their respective housings;
a pilot valve assembly mounted within the main pump body actuable by the connecting rod piston assemblies for sensing the location of the piston assemblies within their respective pump housings, said pilot valve assembly including a spool slidably mounted within a cylindrical reversing valve chamber parallel to the connecting rod, a pusher rod co-axial and integral with the spool slidably mounted for projection into a pump actuating chamber at each end of the spool for sensing movement of a piston assembly and communicating said movement to the pilot valve assembly and sealing means for sealing engagement of the pusher rods in side walls of the main pump body, said sealing means each comprising a plug having an axial opening threadably mounted into a main pump body side wall, each said plug having an O-ring mounted within the axial opening for slidably receiving a push rod;
a reversing valve assembly mounted on the main pump body actuable by the pilot valve assembly for controllably supplying a fluid under pressure to the pump actuating chambers;
and an inlet and discharge manifold disposed along a side of the main pump body straddling the pump housings and secured to the pump housings for communication of the manifold to the radial chambers for ingress and egress of a liquid or a slurry to the said pump chambers, said manifold having a lower inlet and an upper outlet formed therein, vertically spaced apart upper and lower horizontal plates and a vertical transverse partition joining said plates disposed within the manifold dividing the manifold into a lower common inlet chamber, an upper common outlet chamber, and a pair of horizontal chambers in communication with the pump chambers, and check valve means formed in the upper and lower plates communicating the horizontal chambers with the common inlet and outlet chambers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000388663A CA1172904A (en) | 1981-10-23 | 1981-10-23 | Fluid driven reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000388663A CA1172904A (en) | 1981-10-23 | 1981-10-23 | Fluid driven reciprocating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1172904A true CA1172904A (en) | 1984-08-21 |
Family
ID=4121255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388663A Expired CA1172904A (en) | 1981-10-23 | 1981-10-23 | Fluid driven reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1172904A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0298615A2 (en) * | 1987-06-11 | 1989-01-11 | Flotronic Controls Limited | Double-diaphragm pump |
| US5326234A (en) * | 1993-02-17 | 1994-07-05 | Versa-Matic Tool, Inc. | Fluid driven pump |
| US5334003A (en) * | 1993-01-25 | 1994-08-02 | The Aro Corporation | Air valving mechanism, in combination with a double diaphragm pump subassembly |
| WO2002081917A1 (en) * | 2001-04-09 | 2002-10-17 | Pumping Systems Technologies Pty Limited | Displacement pump and ancillary equipment |
| WO2011116911A2 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Double diaphragm pump |
| WO2011116910A2 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Valve for alternately filling two working chambers of a piston-cylinder system of a pump |
| US20150004003A1 (en) * | 2013-06-26 | 2015-01-01 | Ingersoll-Rand Company | Air Mass Control for Diaphragm Pumps |
| CN113062852A (en) * | 2021-05-02 | 2021-07-02 | 石河子大学 | Adjustable squeeze roller type hose pump |
| EP4095383A1 (en) * | 2021-05-19 | 2022-11-30 | Graco Minnesota Inc. | Method and apparatus for mounting a diaphragm of a pump |
-
1981
- 1981-10-23 CA CA000388663A patent/CA1172904A/en not_active Expired
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0298615A2 (en) * | 1987-06-11 | 1989-01-11 | Flotronic Controls Limited | Double-diaphragm pump |
| EP0298615A3 (en) * | 1987-06-11 | 1989-11-15 | Flotronic Controls Limited | Double-diaphragm pump |
| US5334003A (en) * | 1993-01-25 | 1994-08-02 | The Aro Corporation | Air valving mechanism, in combination with a double diaphragm pump subassembly |
| US5326234A (en) * | 1993-02-17 | 1994-07-05 | Versa-Matic Tool, Inc. | Fluid driven pump |
| WO2002081917A1 (en) * | 2001-04-09 | 2002-10-17 | Pumping Systems Technologies Pty Limited | Displacement pump and ancillary equipment |
| DE102010013107A1 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Valve for alternately filling two working spaces of a piston-cylinder system of a pump |
| DE102010013108A1 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Double diaphragm pump |
| WO2011116910A2 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Valve for alternately filling two working chambers of a piston-cylinder system of a pump |
| WO2011116911A2 (en) | 2010-03-26 | 2011-09-29 | Promera Gmbh & Co. Kg | Double diaphragm pump |
| CN103649542A (en) * | 2010-03-26 | 2014-03-19 | 普罗梅拉有限两合公司 | Valve for alternately filling two working chambers of a piston-cylinder system of a pump |
| US20150004003A1 (en) * | 2013-06-26 | 2015-01-01 | Ingersoll-Rand Company | Air Mass Control for Diaphragm Pumps |
| US9752566B2 (en) * | 2013-06-26 | 2017-09-05 | Ingersoll-Rand Company | Air mass control for diaphragm pumps |
| CN113062852A (en) * | 2021-05-02 | 2021-07-02 | 石河子大学 | Adjustable squeeze roller type hose pump |
| CN113062852B (en) * | 2021-05-02 | 2024-03-29 | 石河子大学 | Adjustable squeeze roller type hose pump |
| EP4095383A1 (en) * | 2021-05-19 | 2022-11-30 | Graco Minnesota Inc. | Method and apparatus for mounting a diaphragm of a pump |
| US11655811B2 (en) | 2021-05-19 | 2023-05-23 | Graco Minnesota Inc. | Method and apparatus for mounting a diaphragm of a pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |