EP0317716A2 - Suction and force plunger pump - Google Patents
Suction and force plunger pump Download PDFInfo
- Publication number
- EP0317716A2 EP0317716A2 EP88114447A EP88114447A EP0317716A2 EP 0317716 A2 EP0317716 A2 EP 0317716A2 EP 88114447 A EP88114447 A EP 88114447A EP 88114447 A EP88114447 A EP 88114447A EP 0317716 A2 EP0317716 A2 EP 0317716A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- ring
- plunger
- casing
- suction
- 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.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
- F04B53/1092—Valves; Arrangement of valves inlet and outlet valve forming one unit and one single element forming both the inlet and outlet closure member
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1097—Valves; Arrangement of valves with means for lifting the closure member for pump cleaning purposes
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
Definitions
- the present invention relates to a hydraulic suction and force plunger pump adapted to operate at high pressures particularly for injecting cement mixtures to improve the mechanical and hydraulic characteristics of the soil.
- Reciprocating pumps with multiple cylinders arranged side by side in a line, with a respective single-action suction and force plunger sliding in each cylinder, are already used in consolidating or waterproofing the soil by means of high pressure cement injection.
- the plungers are actuated by a single crankshaft by means of respective cross-head connecting rods.
- the aim of the present invention is therefore to improve the structure of plunger pumps so as to make their manufacture and their use more economical and facilitate and speed the replacement of worn parts and the restoration of the best efficiency and durability conditions.
- a hydraulic pump having at least one pumping chamber in which a suction and force plunger actuated by a cross-head crank system is inserted at a packing-gland sealing device, characterized in that said plunger is connected to said cross-head by means of a quick coupling and said packing-gland device is mounted so as to be extractable from said pumping chamber through an opening thereof opposite to said cross-head, at said opening the packing-gland casing being axially but not tangentially engaged by a ring which is normally adapted to ensure the sealing lock between said chamber, said casing and said ring, said ring being also adapted to unlock said chamber and said casing for extracting the packaging-gland device and, if said coupling is open, the related plunger.
- the pump has a body which is longitudinally separated into three box-like parts 1, 2 and 3, removably associated for example by means of screw elements 4 and 5.
- the body rests on the ground directly with the part 1 and with elements 6 protruding downwards from the part 3 which is the least high of the three abovementioned parts.
- the interior of part 1 is connected to the interior of the central part 2 by means of wide vertical openings 7 and, starting from the related wall which is transverse to the pump, is downwardly tapered.
- the axis of the horizontal crankshaft 9, having in particular three cranks keyed at 120 degrees to one another, is arranged in the transverse plane 8 which separates parts 1 and 2.
- end supports 10 of the shaft 9 are applied both to the end part 1 and to the central one 2, at the co-planer faces thereof which are vertical and longitudinal to the pump and also at openings which affect, in said lateral faces, part 1 for half of their extension and part 2 for the other half; similarly, half of the main bearings, not illustrated, correspond to part 1 and the other half to part 2.
- Each of the big ends of connecting rods 11 is articulated to the respective crank of the crankshaft 9; by means of a pin 12, the small end of each connecting rod 11 is then articulated to the body 13 of a cross-head 14 having skids, the guides 15 whereof are mounted within the central part 2 of the pump body.
- a respective stem 16 is fixed to the body 13 of each cross-head and penetrates into the other end part 3, passing through a gasketed ring 17 which is applied to the wall dividing parts 2 and 3.
- Each stem 16 has a plunger 18 of the suction and force and single-action type.
- the stems and the respective plungers, which extend longitudinally with respect to the pump, are connected to one another by quick couplings 19 of the collar type.
- each stem 16 and of each plunger 18 have a truncated-cone configuration, diverging towards each other, and are closed and locked by two-collar elements 20 which have an inner groove 20a with a configuration which is complementary to that of said ends. Proximate to their separation plane, the two half-collars 20 furthermore have superimposed tabs which, mutually hinged at pivot 21 and are furthermore locked at the opposite position by a screw element 22. Access to the couplings 19 is gained through openings 23 with which the upper face of part 3 of the body is provided: naturally, in order to rapidly open the couplings and release the stems 16 from the plungers 18, the elements 22 should be conveniently positioned upwards, as shown in the figures.
- the openings 23 are normally closed by a cover 24 which is pivoted to the central part 2 at pivot 25.
- the respective openings of the lateral faces of said part 2 are closed by hatches 26; the front openings of the end part 1 are closed by hatches 27 and 28.
- a block 29 is rigidly associated with the front of part 3, and as many pump chambers 31 as there are plungers 18 are defined therein side by side and in a row at respective longitudinal through seats 30; each of said plungers enters its respective pumping chambers at a sealing device 32 with packing gland 33, the gasket element and casing whereof are respectively indicated at 34 and 35.
- the casing 35 is largely external to the block 29 and protrudes towards the coupling 19; inside said block it practically lines the pumping chamber 31 and, in the region opposite to the coupling 10, it forms a sort of dome 35a and ends with an external protrusion which has a groove 36.
- a ring 37 screwed into the threaded hole of a respective part 38, is axially but not tangentially engaged hereat with the casing, and is fixed to the block 29, by means of screw elements 39, and at the opening which is opposite to the coupling 19 in the respective seat 30.
- the ring 37 is conveniently provided with a series of external radial pins 40; the ring and the groove 36 are coaxial to their respective seat 30.
- the bottom 41 of the ring is configured, in its plane, in the shape of a fork, defining the radial slot 41a which is sufficiently wide and long to allow the extraction of the casing 35 from the ring when the latter is moved eccentrically with respect to the former.
- the ring 37 normally ensures the locking of the respective pumping chamber 31 and therefore of the respective casing 35 in the block 29; the ring, acting on the dome 35a, in fact locks the shoulder 35b of the casing 35 against a related shoulder of the seat 30, with gaskets 42 and 43 interposed.
- the suction valve 44 and the delivery valve 45 of a pumping chamber 31 are substantially configured according to a common alignment which is perpendicular to the axis of the respective plunger 18: in practice this alignment is vertical and the two valves are respectively above and below the block 29 and are arranged in related small blocks 46 and 37 fixed to said block with screw elements 48. According to this alignment, the small blocks are traversed by a hole with a threaded outward portion for the coupling of a respective ring connection 40 and 50 which has actuation pins 51 and is then connected to the chamber 31 by a respective passage 52 and 53 which corresponds to a port of the casing 35.
- Both valves comprise a shutter which is generally indicated at 54 and has a stem 54a and a terminal pointed expansion 54b which has a groove for the accommodation of a gasket 55 for sealing and shock-absorption against the seat 56.
- Both valves also comprise a guide 57, with bushes 58 interposed, for the sliding of the shutter stem 54a; a sleeve 59 surrounds the guide and is connected thereto by means of spoke elements 60.
- a retention spring 61 is interposed between the spokes 60 and the expansion 54b of the respective shutter.
- the seat 56 which is outwardly conical, is provided in a recess of the ring-like connection 49; with reference to the valve 45, said seat is instead provided in a recess of the small block 47.
- Both connections 49 and 50 lock an end shoulder of the respective sleeve 59 against a shoulder of the respective blocks 46 and 47, with a gasket 62 interposed.
- the portion 63 of the delivery duct, leading out of the connection 50 and connected thereto with a screw coupling, is substantially flexible and has a wide radius of curvature; the various portions 63 then converge into a single duct.
- Each connection 44 has a flanged inlet removably connected to a respective branching of the suction duct 64.
- the adopted solution allows to achieve a cement-mixture circuit which has no deviations or tortuous paths; this yields an improved volumetric efficiency of the pump and a simplification of the delivery and suction valves; the problems of degradation of the pumped mixtures which occur due to sharp flow variations are avoided.
- the rapidity of the replacement of said valves should also be noted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
Description
- The present invention relates to a hydraulic suction and force plunger pump adapted to operate at high pressures particularly for injecting cement mixtures to improve the mechanical and hydraulic characteristics of the soil.
- Reciprocating pumps with multiple cylinders arranged side by side in a line, with a respective single-action suction and force plunger sliding in each cylinder, are already used in consolidating or waterproofing the soil by means of high pressure cement injection. The plungers are actuated by a single crankshaft by means of respective cross-head connecting rods.
- The mechanism hitherto used for such pumps causes various disadvantages, and in particular it makes them expensive to operate and to be manufactured.
- The aim of the present invention is therefore to improve the structure of plunger pumps so as to make their manufacture and their use more economical and facilitate and speed the replacement of worn parts and the restoration of the best efficiency and durability conditions.
- This aim is achieved by a hydraulic pump having at least one pumping chamber in which a suction and force plunger actuated by a cross-head crank system is inserted at a packing-gland sealing device, characterized in that said plunger is connected to said cross-head by means of a quick coupling and said packing-gland device is mounted so as to be extractable from said pumping chamber through an opening thereof opposite to said cross-head, at said opening the packing-gland casing being axially but not tangentially engaged by a ring which is normally adapted to ensure the sealing lock between said chamber, said casing and said ring, said ring being also adapted to unlock said chamber and said casing for extracting the packaging-gland device and, if said coupling is open, the related plunger.
- Further characteristics and advantages of the invention will become apparent from the detailed description of a preferred embodiment of the pump, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
- figure 1 is a partially cutout overall plan view of the pump;
- figure 2 is a longitudinal vertical sectional view of the pump;
- figure 3 is a view similar to figure 2, illustrating the detail of a pumping chamber.
- With reference to the above described figures, the pump has a body which is longitudinally separated into three box-
like parts screw elements 4 and 5. - The body rests on the ground directly with the
part 1 and withelements 6 protruding downwards from thepart 3 which is the least high of the three abovementioned parts. The interior ofpart 1 is connected to the interior of the central part 2 by means of wide vertical openings 7 and, starting from the related wall which is transverse to the pump, is downwardly tapered. The axis of the horizontal crankshaft 9, having in particular three cranks keyed at 120 degrees to one another, is arranged in thetransverse plane 8 which separatesparts 1 and 2. The end supports 10 of the shaft 9 are applied both to theend part 1 and to the central one 2, at the co-planer faces thereof which are vertical and longitudinal to the pump and also at openings which affect, in said lateral faces,part 1 for half of their extension and part 2 for the other half; similarly, half of the main bearings, not illustrated, correspond topart 1 and the other half to part 2. - Each of the big ends of connecting
rods 11 is articulated to the respective crank of the crankshaft 9; by means of apin 12, the small end of each connectingrod 11 is then articulated to thebody 13 of across-head 14 having skids, theguides 15 whereof are mounted within the central part 2 of the pump body. Arespective stem 16 is fixed to thebody 13 of each cross-head and penetrates into theother end part 3, passing through a gasketedring 17 which is applied to thewall dividing parts 2 and 3. Eachstem 16 has aplunger 18 of the suction and force and single-action type. The stems and the respective plungers, which extend longitudinally with respect to the pump, are connected to one another byquick couplings 19 of the collar type. Thecontiguous ends stem 16 and of eachplunger 18 have a truncated-cone configuration, diverging towards each other, and are closed and locked by two-collar elements 20 which have an inner groove 20a with a configuration which is complementary to that of said ends. Proximate to their separation plane, the two half-collars 20 furthermore have superimposed tabs which, mutually hinged at pivot 21 and are furthermore locked at the opposite position by a screw element 22. Access to thecouplings 19 is gained throughopenings 23 with which the upper face ofpart 3 of the body is provided: naturally, in order to rapidly open the couplings and release thestems 16 from theplungers 18, the elements 22 should be conveniently positioned upwards, as shown in the figures. Theopenings 23 are normally closed by acover 24 which is pivoted to the central part 2 atpivot 25. The respective openings of the lateral faces of said part 2 are closed byhatches 26; the front openings of theend part 1 are closed byhatches - A
block 29 is rigidly associated with the front ofpart 3, and asmany pump chambers 31 as there areplungers 18 are defined therein side by side and in a row at respective longitudinal throughseats 30; each of said plungers enters its respective pumping chambers at asealing device 32 withpacking gland 33, the gasket element and casing whereof are respectively indicated at 34 and 35. Thecasing 35 is largely external to theblock 29 and protrudes towards thecoupling 19; inside said block it practically lines thepumping chamber 31 and, in the region opposite to thecoupling 10, it forms a sort ofdome 35a and ends with an external protrusion which has agroove 36. Aring 37, screwed into the threaded hole of arespective part 38, is axially but not tangentially engaged hereat with the casing, and is fixed to theblock 29, by means ofscrew elements 39, and at the opening which is opposite to thecoupling 19 in therespective seat 30. For its actuation, thering 37 is conveniently provided with a series of externalradial pins 40; the ring and thegroove 36 are coaxial to theirrespective seat 30. For said engagement, thebottom 41 of the ring is configured, in its plane, in the shape of a fork, defining the radial slot 41a which is sufficiently wide and long to allow the extraction of thecasing 35 from the ring when the latter is moved eccentrically with respect to the former. In fact if thering 37 is unscrewed it pulls therespective sealing device 32 along and out of theblock 29 and therespective plunger 18, if thecoupling 19 is open. In this manner a rapid replacement of said entire device and of said plunger and therefore a rapid and safe restoration of the efficiency of the pump are possible even at the work site, leaving to specialized workshops the execution of the maintenance and the restoration of the elements (in particular the gaskets 34 and the plunger 18) which have worn out due to the heavy stresses to which they are subject. On the other hand thering 37 normally ensures the locking of therespective pumping chamber 31 and therefore of therespective casing 35 in theblock 29; the ring, acting on thedome 35a, in fact locks the shoulder 35b of thecasing 35 against a related shoulder of theseat 30, withgaskets - The
suction valve 44 and thedelivery valve 45 of apumping chamber 31 are substantially configured according to a common alignment which is perpendicular to the axis of the respective plunger 18: in practice this alignment is vertical and the two valves are respectively above and below theblock 29 and are arranged in relatedsmall blocks screw elements 48. According to this alignment, the small blocks are traversed by a hole with a threaded outward portion for the coupling of arespective ring connection actuation pins 51 and is then connected to thechamber 31 by arespective passage casing 35. Both valves comprise a shutter which is generally indicated at 54 and has astem 54a and a terminal pointed expansion 54b which has a groove for the accommodation of agasket 55 for sealing and shock-absorption against the seat 56. Both valves also comprise aguide 57, withbushes 58 interposed, for the sliding of theshutter stem 54a; asleeve 59 surrounds the guide and is connected thereto by means ofspoke elements 60. Aretention spring 61 is interposed between thespokes 60 and the expansion 54b of the respective shutter. With reference to thevalve 44, the seat 56, which is outwardly conical, is provided in a recess of the ring-like connection 49; with reference to thevalve 45, said seat is instead provided in a recess of thesmall block 47. Bothconnections respective sleeve 59 against a shoulder of therespective blocks gasket 62 interposed. Theportion 63 of the delivery duct, leading out of theconnection 50 and connected thereto with a screw coupling, is substantially flexible and has a wide radius of curvature; thevarious portions 63 then converge into a single duct. Eachconnection 44 has a flanged inlet removably connected to a respective branching of thesuction duct 64. The adopted solution allows to achieve a cement-mixture circuit which has no deviations or tortuous paths; this yields an improved volumetric efficiency of the pump and a simplification of the delivery and suction valves; the problems of degradation of the pumped mixtures which occur due to sharp flow variations are avoided. The rapidity of the replacement of said valves should also be noted. - The division into parts which has been studied for the body of the pump and the differentiation of the elements which constitute the various operating components allow a greater automation of the pump manufacturing operations and a concentration of the most valuable materials in the more highly stressed points.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT370287 | 1987-11-23 | ||
IT8703702A IT1213730B (en) | 1987-11-23 | 1987-11-23 | HYDRAULIC PUMP WITH DIFFERENT PISTON SUCTION-PRESSURE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0317716A2 true EP0317716A2 (en) | 1989-05-31 |
EP0317716A3 EP0317716A3 (en) | 1989-08-09 |
EP0317716B1 EP0317716B1 (en) | 1991-11-27 |
Family
ID=11111453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88114447A Expired EP0317716B1 (en) | 1987-11-23 | 1988-09-05 | Suction and force plunger pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0317716B1 (en) |
DE (1) | DE3866519D1 (en) |
ES (1) | ES2027358T3 (en) |
IT (1) | IT1213730B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0403445A2 (en) * | 1989-06-14 | 1990-12-19 | VITALI S.p.A. | Drive assembly for presses for extracting cocoa butter from a cocoa paste |
DE4314132A1 (en) * | 1993-05-02 | 1994-11-03 | Friedrich Schwald | Piston pump |
GB2287758A (en) * | 1994-03-19 | 1995-09-27 | Hydrair Ltd | Pumps for shear sensitive material |
EP1260712A2 (en) * | 2001-05-25 | 2002-11-27 | Hammelmann Maschinenfabrik GmbH | Piston pump |
WO2010147826A3 (en) * | 2009-06-18 | 2011-08-25 | Frac Tech Management Llc | Suction manifold mounting for a fluid end for a high-pressure pump |
CN107990022A (en) * | 2017-12-08 | 2018-05-04 | 兰州理工大学 | A kind of flat valve for plunger pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106321398A (en) * | 2015-06-24 | 2017-01-11 | 韩文峰 | Plunger pump used for conveying mixed liquid containing particles |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2131749A (en) * | 1936-06-29 | 1938-10-04 | Homestead Valve Mfg Co | Pump |
US2655870A (en) * | 1947-10-22 | 1953-10-20 | Union Steam Pump Company | Reciprocating pump for food materials |
US3679332A (en) * | 1970-04-10 | 1972-07-25 | Union Pump Co | Reciprocating piston pump |
US3819303A (en) * | 1973-06-13 | 1974-06-25 | Ecodyne Corp | Relief-release pumps |
US4500267A (en) * | 1981-10-08 | 1985-02-19 | Birdwell J C | Mud pump |
-
1987
- 1987-11-23 IT IT8703702A patent/IT1213730B/en active
-
1988
- 1988-09-05 ES ES198888114447T patent/ES2027358T3/en not_active Expired - Lifetime
- 1988-09-05 DE DE8888114447T patent/DE3866519D1/en not_active Expired - Lifetime
- 1988-09-05 EP EP88114447A patent/EP0317716B1/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2131749A (en) * | 1936-06-29 | 1938-10-04 | Homestead Valve Mfg Co | Pump |
US2655870A (en) * | 1947-10-22 | 1953-10-20 | Union Steam Pump Company | Reciprocating pump for food materials |
US3679332A (en) * | 1970-04-10 | 1972-07-25 | Union Pump Co | Reciprocating piston pump |
US3819303A (en) * | 1973-06-13 | 1974-06-25 | Ecodyne Corp | Relief-release pumps |
US4500267A (en) * | 1981-10-08 | 1985-02-19 | Birdwell J C | Mud pump |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0403445A2 (en) * | 1989-06-14 | 1990-12-19 | VITALI S.p.A. | Drive assembly for presses for extracting cocoa butter from a cocoa paste |
EP0403445A3 (en) * | 1989-06-14 | 1992-03-11 | VITALI S.p.A. | Drive assembly for presses for extracting cocoa butter from a cocoa paste |
DE4314132A1 (en) * | 1993-05-02 | 1994-11-03 | Friedrich Schwald | Piston pump |
GB2287758A (en) * | 1994-03-19 | 1995-09-27 | Hydrair Ltd | Pumps for shear sensitive material |
US5611681A (en) * | 1994-03-19 | 1997-03-18 | Hydrair Limited | Reciprocating rod type pump for shear sensitive material |
GB2287758B (en) * | 1994-03-19 | 1998-06-24 | Hydrair Ltd | Pumps for shear sensitive material |
EP1260712A2 (en) * | 2001-05-25 | 2002-11-27 | Hammelmann Maschinenfabrik GmbH | Piston pump |
EP1260712A3 (en) * | 2001-05-25 | 2004-07-21 | Hammelmann Maschinenfabrik GmbH | Piston pump |
WO2010147826A3 (en) * | 2009-06-18 | 2011-08-25 | Frac Tech Management Llc | Suction manifold mounting for a fluid end for a high-pressure pump |
US8105055B2 (en) | 2009-06-18 | 2012-01-31 | Fiac Tech Services, LLC | Suction manifold mounting for a fluid end for a high-pressure pump |
CN107990022A (en) * | 2017-12-08 | 2018-05-04 | 兰州理工大学 | A kind of flat valve for plunger pump |
Also Published As
Publication number | Publication date |
---|---|
IT1213730B (en) | 1989-12-29 |
EP0317716B1 (en) | 1991-11-27 |
IT8703702A0 (en) | 1987-11-23 |
ES2027358T3 (en) | 1992-06-01 |
DE3866519D1 (en) | 1992-01-09 |
EP0317716A3 (en) | 1989-08-09 |
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