CN202176479U - Reciprocating piston pump for low temperature liquid - Google Patents
Reciprocating piston pump for low temperature liquid Download PDFInfo
- Publication number
- CN202176479U CN202176479U CN2011201524909U CN201120152490U CN202176479U CN 202176479 U CN202176479 U CN 202176479U CN 2011201524909 U CN2011201524909 U CN 2011201524909U CN 201120152490 U CN201120152490 U CN 201120152490U CN 202176479 U CN202176479 U CN 202176479U
- Authority
- CN
- China
- Prior art keywords
- cylinder
- piston
- head
- pump
- valve
- 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 - Lifetime
Links
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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
- F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
-
- 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
- F04B53/143—Sealing provided on the piston
-
- 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
-
- 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
- F04B53/168—Mounting of cylinder liners in cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A reciprocating piston pump for low temperature liquid is provided with a cylinder cover cavity (1) located in a pump cylinder (3) and a cylinder sleeve (2). A pump piston (4) is guided in the cylinder sleeve (2). A valve head (5) is disposed in the cylinder cover cavity (1), and a cylinder cover (6) is installed on the pump cylinder (3). The cylinder cover cavity (1) in the pump cylinder (3) is disposed between the cylinder sleeve (2) and the cylinder cover (6), and the pump piston (4) is designed to be in reciprocating motion in the cylinder sleeve (2) so as to form a pumping process. The pump piston (4) is provided with a piston head (40) in the shape of a truncated cone, the valve head (5) is provided with a hole (50) matched with the piston head (40) and provided with an output port (56), and an outlet valve (23) is disposed in the cylinder cover (6) adjacent to the output port (56) in sinking mode. The piston head (40) is designed to penetrate through the space of the hole (50) during the maximum stroke of the piston pump.
Description
Technical field
The utility model relates to a kind of reciprocating piston pump (Hubkolbenpumpe) that is used for cryogenic liquide.
The utility model is particularly related to a kind of reciprocating piston pump that is used for cryogenic liquide, and it has:
Be arranged in the cylinder head chamber and the cylinder liner of pumping cylinder,
The pump piston that in cylinder liner, is guided,
Be arranged on the valve head (Ventilkopf) in the cylinder head chamber, and
Be installed in the cylinder head on the pumping cylinder,
Wherein, the cylinder head chamber is arranged in the pumping cylinder, between cylinder liner and cylinder head, and pump piston is set to, and to-and-fro motion in cylinder liner is to form aspiration procedure.
Background technique
Reciprocating piston pump (being called trunk piston pump or plunger pump again) is basically with of many uses and well-known.Yet they always need carry out the pressing body
(piston) of axial motion in the pump work chamber.In this case, the pressing body of pump piston and pump work chamber are arranged in valve head and cylinder liner.Axial motion is meant the to-and-fro motion of pump piston in cylinder liner.
The reciprocating piston pump of the above-mentioned type is applied in those cryopumps that relate to extremely high pressure especially.The cryopump that for example is used for the medium as liquid nitrogen or liquid methane, its working pressure is from 500bar to 1500bar and even in the higher scope.
An example of this pump has been described in patent documentation US2003/0080512.This patent documentation shows a kind of such cryopump that is used for extremely high pressure, and it has above-described structure.
In patent documentation US2003/0080512, in the pumping cylinder main body between cylinder liner and last cylinder head, annular chamber is set, wherein, cylinder head comprises the output channel that is used for the cryogenic liquide under the high pressure.Valve head inserts in the annular chamber, and the input channel that is used herein to the cryogenic liquide under the low pressure is connected with annular chamber.Valve head has the penetrating via
that is obliquely installed and draws cryogenic liquide through this passage.Valve head has the recess of axial setting at outlet side, and the outlet valve that is installed on the last cylinder head inserts wherein.Under the state that has assembled, outlet valve is positioned at valve head inside fully.Pump piston comprises piston head, and it has the shape (Ausformung) of short truncated cone in the bottom, and the cam (Nocken) that is molded in the middle protrusion on the truncated cone.In the maximum piston stroke of pump piston, cam gets in the slight depression of cylinder head, but the base of the truncated cone shape of piston head does not get into.Therefore in this embodiment, the outlet passage between depression and the outlet valve is not discharged cryogenic media fully, because mechanical presses does not take place in this zone.In addition; The shortcoming of reciprocating piston pump in similar mode of execution with piston head also is; Follow the working pressure that increases gradually, in any pump piston stroke, all pressure peak or compression shock can occur, this also means the increasingly high stress alternation of material certainly.In the long run, this possibly cause fatigue of materials and fracture.
The model utility content
Therefore, the purpose of the utility model is, proposes a kind of reciprocating piston pump that is used for cryogenic liquide, this piston this for higher and even high working pressure, still can be reliably, interference-free work.
The reciprocating piston pump that is used for cryogenic liquide according to the utility model; Have the cylinder head chamber and the cylinder liner that are arranged in pumping cylinder; The pump piston that in said cylinder liner, is guided is arranged on the valve head in the said cylinder head chamber, and is installed in the cylinder head on the said pumping cylinder; Wherein, Said cylinder head chamber is arranged in said pumping cylinder between said cylinder liner and the said cylinder head, and said pump piston is designed to to-and-fro motion in said cylinder liner, to form aspiration procedure; Wherein, Said pump piston has the piston head of truncated cones shape, and said valve head has the hole
and the outlet valve that adapt with said piston head and have delivery outlet and is arranged in the said cylinder head, wherein adjacent to delivery outlet saggingly; Said piston head is configured to, when the maximum piston pump stroke, passes the space (Volumen) in said hole.
In the reciprocating piston pump according to the utility model, the piston head of said truncated cones shape is configured to make the diameter of the height of truncated cone greater than the truncated cone bottom surface.In addition, said outlet valve is configured to cone valve shape.Said valve head has at the sealing function of cylinder liner side and cylinder head side on supporting surface and has the surface that is easier to process with abrasive process.
If the piston head shape is complementary with the hole of valve head exactly, and when the maximum piston stroke, passes completely through the space in hole, then cryogenic media is in fact always mechanically discharged from valve head in each reciprocating pump stroke fully.In addition; Because also can directly adjoining the delivery outlet of valve head, outlet valve is arranged in the pressure sleeve (Druckstutzen) subsequently saggingly; Therefore in fact in the pump work chamber, do not have cryogenic media possibly remain in cavity wherein, and greatly reduced thus because the function that the medium residue causes is disturbed.
Utilize the truncated cones shape of piston head greatly to ease off the pressure to impact and therefore improve the life-span and the reliability of reciprocating piston pump.If the truncated cones shape of piston head is configured to, make the diameter of the height of truncated cone greater than the truncated cone bottom surface, then can make the compression shock that produces through shallow cone angle very not obvious.
Simple valve head moulding can bring more advantage.If outlet valve no longer is arranged in the zone of valve head, then can make the reprocessing on valve head surface become simpler.Valve head surface (surface of contact that comprises valve head and cylinder head and cylinder liner) requirement to be for example to grind the smooth surface of such fine-processing technique making, and why Here it is preferably will avoid the working surface that sink.
Description of drawings
Next describe according to the embodiment of accompanying drawing the utility model.
Fig. 1 shows the longitudinal section according to the reciprocating piston pump of the utility model.
Embodiment
Fig. 1 shows the reciprocating piston pump that is used for cryogenic liquide, and it has:
Be arranged in the cylinder head chamber 1 and cylinder liner 2 of pumping cylinder 3,
The pump piston 4 that in cylinder liner 2, is guided,
Be arranged on the valve head 5 in the cylinder head chamber 1, and
Can be installed in the cylinder head 6 on the pumping cylinder 3,
Wherein, cylinder head chamber 1 is arranged in pumping cylinder 3 between cylinder liner 2 and the cylinder head 6, and pump piston 4 is set to, and to-and-fro motion in cylinder liner 2 is to form aspiration procedure.In the figure, pump piston 4 is on the maximum pump piston stroke.
Pumping cylinder 3 comprises the inlet 10 with inlet flange 11, and inlet flange 11 feeds in the zone in cylinder head chamber 1, and arrives the cryogenic media to be extracted that is in the cylinder head chamber 1 under the low pressure thus.In addition, pumping cylinder 3 also has exhaust outlet 12, and it is connected with cylinder head chamber 1 equally, through this exhaust outlet the cryogenic media of evaporation is discharged.In addition, pumping cylinder 3 also has leak liquid outlet 13, and this outlet is connected with the gap 14 of cylindrical shell shape between pumping cylinder 3 and cylinder liner 2, and can be thus with the leakage liquid discharge that possibly accumulate in here.Other CONSTRUCTED SPECIFICATIONs of pumping cylinder 3 are not explained at this, because the function of they and the utility model is irrelevant.
The cylinder head 6 of utilizing sealing and being installed on the pumping cylinder 3 with tightening is sealed pumping cylinder 3.Cylinder head 6 has the outlet 20 on outlet(discharge) flange 21, and this outlet(discharge) flange seals equally and is installed on the cylinder head 6 with tightening in the one of which side.Can the cryogenic media that be under the high pressure be discharged through exporting 20.Cylinder head 6 has the outlet passage 22 of axial setting, and wherein, one side is provided with the outlet valve 23 of cone valve (Ventilpilz) shape with embedding deeply in the cylinder head chamber.One side has flat supporting surface 24 to cylinder head 6 in the cylinder head chamber.
Cylinder liner 2 has the shape of hollow cylinder basically, and in pumping cylinder 3 axially alignment ground be set to the gap 14 of the narrow cylindrical shell bodily form that the reservation front is addressed between the internal surface of the outer surface of cylinder liner 2 and pumping cylinder.One side has flat supporting surface 30 and surface depression (Einsatzvertiefung) 31 to cylinder liner 2 in the cylinder head chamber.In this surface depression, pressure spring 32 and valve plate 33 are set, they constitute inlet valve jointly.
Pump piston 4 is endwisely slipped to guide gets into cylinder liner 2, and has the piston head 40 of truncated cones shape.At this; The truncated cones shape of piston head is such: the height of truncated cone is greater than the diameter of truncated cone bottom surface; Wherein, the latter conforms to the cross section of pump piston 4 basically, and adapts in the shape of the transition region that is arranged in truncated cone foot with valve plate 33.
Pump piston 4 has seal area 41 near the zone piston head, in this zone, is provided with circular groove 42, PTFE/ bronze ring 43,44,45 and guide ring 46 like the labyrinth.The 26S Proteasome Structure and Function of PTFE/ bronze ring 43,44,45 is known basically, and describes to some extent among the patent documentation US2003/0080512 that is for example mentioned in the above.They are used between the propelling zone of pump piston 4 and pump work chamber, setting up this effective sealing under high pressure.
Be installed between cylinder liner 2 and the cylinder head 6, the valve head in cylinder head chamber 15 has the shape of hollow cylinder basically, and the outside breach of annular groove-shaped is arranged on this hollow cylinder.This hollow cylinder is made up of the continuous hole 50 of axial setting, and the piston head 40 of the shape in this hole and pump piston 4 is complementary.A plurality of service ducts 51 that is to say that from the internal surface of the cylinder liner side in regional guidance to the zone that is arranged in valve plate 33 of outside breach valve plate 33 has covered the cross section of service duct 51, and this is the major component of inlet valve function.In addition, valve head 5 has supporting surface 52 in cylinder liner one side, and it abuts in through copper Sealing 53 on the supporting surface 30 of chamber side of cylinder liner 2.Valve head 5 also has another supporting surface 54 of cylinder head side, and this supporting surface abuts in through another copper Sealing 55 on the supporting surface 24 of chamber side of cylinder head 6.Can realize that thus this keeps sealing relatively in higher working pressure to make inlet region (cylinder head chamber 1) and outlet area (outlet passage 22).
Valve head 5 has delivery outlet 56 at cylinder head side.Under the mounted state of valve head 5, delivery outlet 56 is adjacent with outlet valve 23.At this piston head 40 of pump piston 4 and the hole 50 of valve head 5 are configured to, make piston head 40 when the maximum piston pump stroke, pass completely through and fill up the space in hole 50.In this way, can when the maximum piston pump stroke, in the pump work chamber, only leave a small amount of inappreciable cryogenic liquide to be extracted.
Reciprocating piston pump according to the utility model; Its working principle is following: when pump piston 4 pumpbacks; In the hole 50 of valve head 5 and in the zone of the surface of cylinder liner 2 depression 31, cavity can occur, this cavity is called as the pump work chamber, at this; Through incident suction effect, cryogenic media is drawn onto in the pump work chamber through service duct 51 and valve plate 33.Make the pump work chamber when minimum reciprocating pump stroke, obtain farthest expansion thus.When pump piston 4 was pushed ahead subsequently, valve plate 33 was closed, and outlet valve 23 is opened.When reaching the maximum piston pump stroke (as shown in Figure 1), the cryogenic liquide that before is inhaled into the entire quantity in the pump work chamber is thus through outlet passage 22 ejections.
Can draw thus to draw a conclusion: utilize the moulding of the piston head 40 that is proposed greatly to reduce compression shock, and therefore improve the life-span and the reliability of reciprocating piston pump.If the truncated cone on the piston head is configured to, make the diameter of the height of truncated cone greater than the truncated cone bottom surface, then very not obvious from the compression shock of shallow cone angle generation.In principle, can avoid to a great extent or reduce to be positioned at the pressure side on the piston head as far as possible, this pressure side is substantially perpendicular to piston axis A.
Reference numerals list
1 cylinder head chamber
2 cylinder liner
3 pumping cylinders
4 pump pistons
5 valve heads
6 cylinder head
10 inlets
11 inlet flanges
12 exhaust outlets
The outlet of 13 leak liquid
14 gaps
20 outlets
21 outlet(discharge) flanges
22 outlet passages
23 outlet valves
24 supporting surfaces
30 supporting surfaces
31 surface depressions (Einsatzvertiefung)
32 pressure springs
33 valve plates
40 piston heads
41 seal areas
42 circular grooves
43PTFE/ bronze ring
44PTFE/ bronze ring
45PTFE/ bronze ring
46 lead rings
50 holes
51 service ducts
52 supporting surfaces (cylinder liner side)
53 bronze medal Sealings
54 another supporting surfaces (cylinder head side)
55 another copper Sealings
56 delivery outlets
The A piston axis.
Claims (4)
1. reciprocating piston pump that is used for cryogenic liquide has:
Be arranged in the cylinder head chamber (1) and the cylinder liner (2) of pumping cylinder (3),
The pump piston (4) that in said cylinder liner (2), is guided,
Be arranged on the valve head (5) in the said cylinder head chamber (1), and
Be installed in the cylinder head (6) on the said pumping cylinder (3),
Wherein, said cylinder head chamber (1) is arranged in said pumping cylinder (3) between said cylinder liner (2) and the said cylinder head (6), and said pump piston (4) is designed to to-and-fro motion in said cylinder liner (2), forming aspiration procedure,
It is characterized in that,
Said pump piston (4) has the piston head (40) of truncated cones shape,
Said valve head (5) has the hole (50) that adapts with said piston head (40) and have delivery outlet (56), and
Outlet valve (23) is arranged in the said cylinder head (6) adjacent to delivery outlet (56) saggingly,
Wherein, said piston head (40) is configured to, when the maximum piston pump stroke, passes the space of said hole (50).
2. reciprocating piston pump as claimed in claim 1 is characterized in that, the piston head of said truncated cones shape (40) is configured to, and makes the diameter of the height of said truncated cone greater than this truncated cone bottom surface.
3. reciprocating piston pump as claimed in claim 1 is characterized in that, said outlet valve (23) is configured to cone valve shape.
4. reciprocating piston pump as claimed in claim 1 is characterized in that, said valve head (5) has at the sealing function of cylinder liner side and cylinder head side on supporting surface (52,54) and has the surface that is easier to process with abrasive process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH00988/10 | 2010-06-21 | ||
| CH9882010A CH703376B1 (en) | 2010-06-21 | 2010-06-21 | Reciprocating piston pump for cryogenic fluids. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176479U true CN202176479U (en) | 2012-03-28 |
Family
ID=43478241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201524909U Expired - Lifetime CN202176479U (en) | 2010-06-21 | 2011-05-11 | Reciprocating piston pump for low temperature liquid |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP5774384B2 (en) |
| CN (1) | CN202176479U (en) |
| CH (1) | CH703376B1 (en) |
| DE (1) | DE202011004320U1 (en) |
| FR (1) | FR2961560B3 (en) |
| IT (1) | ITUD20110007U1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279135A (en) * | 2013-07-11 | 2015-01-14 | 西港能源有限公司 | Low-pressure and low-temperature pump assembly |
| CN109209852A (en) * | 2017-07-01 | 2019-01-15 | 三井易艾斯机械有限公司 | The shaft seal of piston pump |
| CN109798233A (en) * | 2019-03-25 | 2019-05-24 | 中盐安徽红四方股份有限公司 | Modified cryogenic liquid pump |
| CN115342040A (en) * | 2021-05-12 | 2022-11-15 | 三井易艾斯机械有限公司 | Piston pump |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5519857B1 (en) | 2013-12-26 | 2014-06-11 | 三井造船株式会社 | Low-temperature liquefied gas suction / discharge valve body, reciprocating pump, and fuel gas supply device |
| CH709894A1 (en) | 2014-07-25 | 2016-01-29 | Fives Cryomec Ag | Reciprocating piston pump for cryogenic fluids. |
| FR3109610B1 (en) | 2020-04-23 | 2022-04-08 | Air Liquide | Compression apparatus and filling station comprising such apparatus |
| FR3115332B1 (en) * | 2020-10-19 | 2022-12-02 | F2M | Pump comprising cooling means |
| EP4229297A1 (en) * | 2020-10-19 | 2023-08-23 | F2M | Pump comprising cooling means |
| RU2752331C1 (en) * | 2021-01-13 | 2021-07-26 | Юрий Иванович Духанин | Cryogenic piston pump |
| JP7104840B1 (en) | 2021-05-12 | 2022-07-21 | 株式会社三井Ｅ＆Ｓマシナリー | Piston pump |
| JP7200310B1 (en) | 2021-08-05 | 2023-01-06 | 株式会社三井Ｅ＆Ｓマシナリー | piston pump |
| US20230287875A1 (en) * | 2022-03-08 | 2023-09-14 | Air Products And Chemicals, Inc. | Apparatus and method for cryogenic pump cooldown |
| FR3137946A1 (en) * | 2022-07-13 | 2024-01-19 | Fives Cryomec Ag | CRYOGENIC LIQUID PUMP |
| WO2024047050A1 (en) * | 2022-08-30 | 2024-03-07 | SVANEHØJ Danmark A/S | A piston pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1478050A (en) * | 1966-04-29 | 1967-04-21 | Positive displacement pump, reciprocating, especially for handling cryogenic liquids | |
| US5188519A (en) * | 1991-07-11 | 1993-02-23 | Cvi Incorporated | Saturated fluid pumping apparatus |
| US5996472A (en) * | 1996-10-07 | 1999-12-07 | Chemical Seal And Packing, Inc. | Cryogenic reciprocating pump |
| FR2805006B1 (en) * | 2000-02-11 | 2002-06-14 | Air Liquide | VERY HIGH PRESSURE CRYOGENIC PUMP |
| JP2002257034A (en) * | 2001-02-13 | 2002-09-11 | L'air Liquide Sa Pour L'etude & L'exploitation Des Procedes Georges Claude | Low temperature pump and piston for low temperature pump |
| CH695462A5 (en) * | 2002-06-10 | 2006-05-31 | Vanzetti Engineering S R L | Pump for pumping cryogenic fluid from reservoir into gas bottle, has circular gap formed over entire length of bushing to keep bushing centered in housing by retainer and by pressing bushing into retainer and against stopping surface |
-
2010
- 2010-06-21 CH CH9882010A patent/CH703376B1/en unknown
-
2011
- 2011-03-24 DE DE202011004320U patent/DE202011004320U1/en not_active Expired - Lifetime
- 2011-05-10 FR FR1153986A patent/FR2961560B3/en not_active Expired - Lifetime
- 2011-05-11 CN CN2011201524909U patent/CN202176479U/en not_active Expired - Lifetime
- 2011-06-17 IT ITUD20110007 patent/ITUD20110007U1/en unknown
- 2011-06-21 JP JP2011137404A patent/JP5774384B2/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279135A (en) * | 2013-07-11 | 2015-01-14 | 西港能源有限公司 | Low-pressure and low-temperature pump assembly |
| CN104279135B (en) * | 2013-07-11 | 2018-10-16 | 西港能源有限公司 | Low-pressure low-temperature pump group part |
| CN109209852A (en) * | 2017-07-01 | 2019-01-15 | 三井易艾斯机械有限公司 | The shaft seal of piston pump |
| CN109798233A (en) * | 2019-03-25 | 2019-05-24 | 中盐安徽红四方股份有限公司 | Modified cryogenic liquid pump |
| CN109798233B (en) * | 2019-03-25 | 2020-10-09 | 中盐安徽红四方股份有限公司 | Improved deep cooling liquid pump |
| CN115342040A (en) * | 2021-05-12 | 2022-11-15 | 三井易艾斯机械有限公司 | Piston pump |
| CN115342040B (en) * | 2021-05-12 | 2023-03-24 | 三井易艾斯机械有限公司 | Piston pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CH703376B1 (en) | 2014-05-15 |
| JP5774384B2 (en) | 2015-09-09 |
| JP2012002224A (en) | 2012-01-05 |
| FR2961560B3 (en) | 2012-06-15 |
| FR2961560A3 (en) | 2011-12-23 |
| DE202011004320U1 (en) | 2011-05-26 |
| CH703376A1 (en) | 2011-12-30 |
| ITUD20110007U1 (en) | 2011-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202176479U (en) | Reciprocating piston pump for low temperature liquid | |
| US9677548B2 (en) | Pump | |
| US8366409B2 (en) | Reciprocating pump | |
| US3811801A (en) | Multi-plunger reciprocating pump | |
| CN110094323B (en) | Reciprocating compressor | |
| CN100564882C (en) | Variable capacity rotary compressor | |
| CN101421514A (en) | Reciprocating-piston compressor having non-contact gap seal | |
| JP6609051B2 (en) | Sliding vane control structure of variable volume cylinder, variable volume cylinder and variable capacity compressor | |
| CN102374148A (en) | Double acting fluid pump | |
| KR940009527A (en) | Reciprocating Compressor | |
| CN103742378A (en) | Radial plunger hydraulic pump adopting slide valves for flow distribution | |
| US20030133813A1 (en) | Gas compressor and method with an improved inlet and discharge valve arrangement | |
| US20230258174A1 (en) | Cover for fluid systems and related methods | |
| CN112648188B (en) | Double-cylinder compressor pump body and double-cylinder compressor | |
| CN101338707A (en) | Piston, piston ring assembly for internal combustion engine | |
| CN208934876U (en) | A kind of compression assembly and compressor | |
| KR101335421B1 (en) | Hermetic compressor | |
| KR101604764B1 (en) | Swash plate type expander | |
| KR200382905Y1 (en) | Gasket for compressor | |
| CN110792540A (en) | Leak protection plunger matching parts for injection pump | |
| CN104895791A (en) | Rolling rotor type compression mechanism and compressor comprising same | |
| CN101849099B (en) | High-pressure fuel pump | |
| CN114215726A (en) | Membrane head structure of diaphragm compressor | |
| JP5293351B2 (en) | Pump device | |
| KR100755945B1 (en) | Semi-oil injected oilless air compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |