CN1752441A - Hydraulic reciprocating pump - Google Patents
Hydraulic reciprocating pump Download PDFInfo
- Publication number
- CN1752441A CN1752441A CN 200510094777 CN200510094777A CN1752441A CN 1752441 A CN1752441 A CN 1752441A CN 200510094777 CN200510094777 CN 200510094777 CN 200510094777 A CN200510094777 A CN 200510094777A CN 1752441 A CN1752441 A CN 1752441A
- Authority
- CN
- China
- Prior art keywords
- valve
- pipeline
- piston
- chamber
- reciprocating pump
- 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
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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
There is disposed a hydraulic reciprocating pump which comprises a reciprocating pump, two power cylinders, a reversing valve, pump electric unit and fuel tank with hydraulic oil. The chamber is separated to a hydraulic chamber and a working chamber by the piston in the reciprocating pump. The working chamber is connected into the one-way valve. The liquid is poured fully into the non-piston chamber of the power cylinder which is connected with the hydraulic chamber of the pump body via the pipeline. A control mechanism of the reversing valve is disposed on the power cylinder. The oil inlet of the reversing valve is connected with the pump electric unit and fuel tank successively by the pipeline. Two oil outlets are connected to the chamber with pistons of the power cylinder separately by the pipeline. The backflow port is connected with the fuel tank by the pipeline.
Description
One, technical field
The present invention relates to a kind of pump, a kind of specifically hydraulic reciprocating pump that utilizes liquid transfer power.
Two, background technique
Pump is a kind of machinery of carrying liquid or making the liquid supercharging.It is to send the mechanical energy of prime mover or other external energies to liquid, thereby liquid kinetic energy is increased along line transportation.The liquid that pump is mainly used to carry comprises water, oil, acid ﹠ alkali liquid, emulsified liquid, suspended emulsion and liquid metal etc., the also liquid that can carry liquid, gaseous mixture and contain suspended solids.Can be divided into positive displacement pump, driving type pump and other types pump by the working principle pump, as Jet injector, hydraulic ram, electromagnetic pump, gas liftpump.
Positive displacement pump is to rely on operation element to do in pumping cylinder back and forth or rotation motion, swept volume is alternately increased and dwindles, with the suction and the discharge of realization liquid.The reciprocating positive displacement pump of operation element is called reciprocating pump, makes the rotary pump that is called of rotation motion.The former suction and discharge process hocket in same pumping cylinder, and are controlled by suction valve and expulsion valve; The latter then is by the turning effort of operation elements such as gear, screw rod, leaf rotor or slide plate, forces liquid to transfer to the discharge side from the suction side.Reciprocating pump is applicable to the working environment of high pressure and small flow, is widely used in worker, the agricultural.Existing reciprocating pump critical piece comprises: pumping cylinder, piston, piston rod, unidirectional suction valve, one-way release valve, and generally adopt motor as its motive force, by a cover crank linkage mechanism transmission, rotatablely moving of motor become the to-and-fro motion of piston; Or directly drive by steamer, piston is moved reciprocatingly.But as motive reciprocating pump complex structure, cost is higher, has limited it and has further applied with motor or steamer.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide and a kind ofly utilize the liquid transfer energy so that the hydraulic reciprocating pump of reciprocating pump work, it can realize remote transferring power.
2, technological scheme: hydraulic reciprocating pump of the present invention is characterized in that: it comprises reciprocating pump, two power cylinders, selector valve, pump motor groups and the fuel tank that hydraulic oil is housed;
Reciprocating pump comprises the pump housing and the piston assembly with two continuous chambers, described piston assembly is made up of piston rod and two pistons that are installed in the piston rod two ends, two pistons are separately positioned in two chambers of the pump housing, and with chamber be divided into the fluid power chamber and the acting chamber, the acting chamber is connected with feed liquor one-way valve and fluid one-way valve respectively, wherein the feed liquor one-way valve links to each other with liquid inlet pipe, and the fluid one-way valve links to each other with drain pipe;
Power cylinder comprises cylinder body, piston and piston rod, described piston is installed in the cylinder body and cylinder body is divided into rod end chamber and piston-less lumen, wherein do not have and fill with liquid in the piston cavity and link to each other with the fluid power chamber of the pump housing respectively, on power cylinder, be provided with the control mechanism of selector valve by pipeline;
Selector valve comprises a filler opening, two oil outlets and a refluxing opening, described filler opening connects pump motor group and the fuel tank that is used for delivery hydraulic pressure oil successively by pipeline, two oil outlets connect the rod end chamber that has of power cylinder respectively by pipeline, and refluxing opening connects fuel tank by pipeline.
The control mechanism of described selector valve is to be provided with contact on the piston rod of power cylinder, is provided with the selector valve position limit switch corresponding with contact on cylinder body.If conditions permit, control mechanism also can adopt computer, intergrated circuit or template control, provide control signal by the sensor that is arranged on power cylinder or the reciprocating pump, these technology are current techique, do not repeat them here; Selector valve can be the electromagnetism two-position four way change valve, can certainly adopt the selector valve of other type.
Damage selector valve and power cylinder in order to prevent the hydraulic oil superpressure, a leading type fluid valve in parallel between the filler opening of selector valve and pump motor group, the outlet of leading type fluid valve connects fuel tank by pipeline, when hydraulic oil surpasses rated pressure, the leading type fluid valve is opened, and the hydraulic oil bypass comes back to fuel tank.
Between fuel tank and pump motor group, selector valve, leading type fluid valve, be connected with oil purifier by pipeline respectively, can filter out the impurity in the hydraulic oil.
Working principle: referring to Fig. 1, at first, pump motor group 5 starts, hydraulic oil sucks oil pump by oil pipe through oil purifier 33 by fuel tank 6, the high pressure oil that pumps enters electromagnetism two-position four way change valve 4 by filler opening 27, when electromagnetism two-position four way change valve 4 outage, high pressure oil has a rod end chamber 24 by what oil outlet 28 entered power cylinder 3.This moment, the piston 22 of power cylinder 3 was descending, liquid in the piston-less lumen 26 enters the fluid power chamber 11 of reciprocating pump 1 through pipeline, it is up to promote piston 9, it is up to drive piston 10 simultaneously, fluid power chamber 12 volumes of reciprocating pump 1 diminish, the liquid that the fluid power chamber is 12 li enters in the piston-less lumen 25 of power cylinder 2 through pipeline, it is up to promote piston 21, rod end chamber 23 volumes that have of power cylinder 2 diminish, hydraulic oil passes back into electromagnetism two-position four way change valve 4, flow out by refluxing opening 30, flow back to fuel tank 6 through oil purifier 33.When the volume in reciprocating pump 1 acting chamber 13 diminishes, feed liquor one-way valve 15 is closed, fluid one-way valve 17 is opened, water is pumped to drain pipe 20, when acting chamber 13 volumes diminished, the volume in acting chamber 14 increased, and fluid one-way valve 18 is closed, feed liquor one-way valve 16 is opened, and water enters acting chamber 14 through liquid inlet pipe 19.When the piston 22 of oil cylinder 3 walks to lower dead centre, contact 31 touches position limit switch 32, this moment 4 energisings of electromagnetism two-position four way change valve and action, spool moves to right and changes oily flow path direction, this moment high pressure oil through oil outlet 29 enter power cylinder 2 to have rod end chamber 23 to promote pistons 21 descending, piston-less lumen 25 volumes of power cylinder 2 diminish, liquid enters the fluid power chamber 12 of reciprocating pump 1 through pipeline, promote piston 10 and drive piston 9 descending, when piston 9 is descending, the volume in fluid power chamber 11 diminishes, liquid enters the piston-less lumen 26 of power cylinder 3 through pipeline, it is up to promote piston 22 beginnings, has the hydraulic oil in the rod end chamber 24 to enter electromagnetism two-position four way change valve 4 through oil pipe, and by refluxing opening 30, oil purifier 33 flows back to fuel tank 6.At this moment, the volume in acting chamber 13 becomes big, and fluid one-way valve 17 is closed, and feed liquor one-way valve 15 is opened, and water enters in the acting chamber 13 by liquid inlet pipe 19; And piston 10 is when descending, and the volume in acting chamber 14 diminishes, and fluid one-way valve 18 is opened, and feed liquor one-way valve 16 is closed, and the water in the acting chamber 14 is flowed out by drain pipe 20 through fluid one-way valve 18.When the piston 21 of power cylinder 2 walked to lower dead centre, contact 31 touched position limit switch 32, electromagnetism two-position four way change valve 4 outages this moment, spool moves to left and changes oily flow path direction, oil outlet 29 is fuel-displaced, and oil outlet 28 is closed, and electromagnetism two-position four way change valve 4 is got back to initial position.Like this, thus go round and begin again the circulation this process constantly water pump is gone out.
3, beneficial effect: the present invention compared with prior art has following characteristics: (1) is by adopting power cylinder, selector valve and pump motor group, utilize the liquid transfer energy so that reciprocating pump work, thereby saved with motor or steamer labyrinth as prime mover; (2) its structure can be thought integrated type, also can be for split type, and each parts can rationally be provided with and adopt pipeline to connect as required, in order to satisfy the requirement of different use occasions; (3) this hydraulic reciprocating pump serves many purposes, and can be used to extract water, underground crude oil, alkali, acid, sewage mud and uses as metering pump.
Four, description of drawings
Fig. 1 is a structural representation of the present invention.
Five, embodiment
As shown in Figure 1, hydraulic reciprocating pump of the present invention, it comprises reciprocating pump 1, two power cylinders 2,3, selector valve 4, pump motor groups 5 and the fuel tank 6 that hydraulic oil is housed; Wherein:
Reciprocating pump 1 comprises the pump housing 7 and the piston assembly with two continuous chambers, piston assembly is made up of piston rod 8 and two pistons 9,10 that are installed in piston rod 8 two ends, two pistons 9,10 are separately positioned in two chambers of the pump housing 7, and with chamber be divided into fluid power chamber 11,12 and the acting chamber 13,14, acting chamber 13,14 is connected with feed liquor one- way valve 15,16 and fluid one- way valve 17,18 respectively, wherein feed liquor one- way valve 15,16 links to each other with liquid inlet pipe 19, fluid one- way valve 17,18 links to each other with drain pipe 20, and reciprocating pump 1 can be vertical or horizontal type structure;
Selector valve 4 comprises a filler opening 27, two 28,29 and refluxing openings 30 of oil outlet, described filler opening 27 connects pump motor group 5, oil purifier 33 and the fuel tank 6 that is used for delivery hydraulic pressure oil successively by pipeline, two oil outlets 28,29 have a rod end chamber 23,24 by what pipeline connected power cylinder 2,3 respectively, and refluxing opening 30 connects oil purifier 33, fuel tank 6 successively by pipeline.
The leading type fluid valve 34 that an overpressure protection in parallel is used between the filler opening 27 of selector valve 4 and pump motor group 5, the outlet of leading type fluid valve 34 connects oil purifier 33, fuel tank 6 successively by pipeline.
Claims (6)
1, a kind of hydraulic reciprocating pump is characterized in that: it comprises reciprocating pump (1), two power cylinders (2,3), selector valve (4), pump motor group (5) and the fuel tank (6) that hydraulic oil is housed; Wherein:
Reciprocating pump (1) comprises the pump housing (7) and the piston assembly with two continuous chambers, described piston assembly is by piston rod (8) and is installed in two pistons (9 at piston rod (8) two ends, 10) form, two pistons (9,10) be separately positioned in two chambers of the pump housing (7), and chamber is divided into fluid power chamber (11,12) and the acting chamber (13,14), acting chamber (13,14) be connected with feed liquor one-way valve (15 respectively, 16) and fluid one-way valve (17,18), wherein the feed liquor one-way valve (15,16) link to each other fluid one-way valve (17 with liquid inlet pipe (19), 18) link to each other with drain pipe (20);
Power cylinder (2,3) comprises cylinder body, piston (21,22) and piston rod, described piston (21,22) is installed in the cylinder body and cylinder body is divided into rod end chamber is arranged (23,24) and piston-less lumen (25,26), wherein do not have and fill with liquid in the piston cavity (25,26) and link to each other with the fluid power chamber (11,12) of the pump housing (7) respectively, on power cylinder (2,3), be provided with the control mechanism of selector valve (4) by pipeline;
Selector valve (4) comprises a filler opening (27), two oil outlets (28,29) and a refluxing opening (30), described filler opening (27) connects pump motor group (5) and the fuel tank (6) that is used for delivery hydraulic pressure oil successively by pipeline, two oil outlets (28,29) have a rod end chamber (23,24) by what pipeline connected power cylinder (2,3) respectively, and refluxing opening (30) connects fuel tank (6) by pipeline.
2, hydraulic reciprocating pump according to claim 1, it is characterized in that: the control mechanism of described selector valve (4) is to be provided with contact (31) on the piston rod of power cylinder (2,3), is provided with the selector valve position limit switch (32) corresponding with contact (31) on cylinder body.
3, hydraulic reciprocating pump according to claim 1 and 2 is characterized in that: described selector valve (4) is the electromagnetism two-position four way change valve.
4, hydraulic reciprocating pump according to claim 1 and 2 is characterized in that: be connected with oil purifier (33) by pipeline respectively between fuel tank (6) and pump motor group (5), selector valve (4).
5, hydraulic reciprocating pump according to claim 1 and 2; it is characterized in that: the leading type fluid valve (34) that an overpressure protection in parallel is used between the filler opening (27) of selector valve (4) and pump motor group (5), the outlet of leading type fluid valve (34) connects fuel tank (6) by pipeline.
6, hydraulic reciprocating pump according to claim 5 is characterized in that: be connected with oil purifier (33) by pipeline between fuel tank (6) and leading type fluid valve (34).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510094777XA CN100337031C (en) | 2005-10-13 | 2005-10-13 | Hydraulic reciprocating pump |
| PCT/CN2006/002502 WO2007041935A1 (en) | 2005-10-13 | 2006-09-25 | Hydraulic reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510094777XA CN100337031C (en) | 2005-10-13 | 2005-10-13 | Hydraulic reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1752441A true CN1752441A (en) | 2006-03-29 |
| CN100337031C CN100337031C (en) | 2007-09-12 |
Family
ID=36679415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510094777XA Expired - Fee Related CN100337031C (en) | 2005-10-13 | 2005-10-13 | Hydraulic reciprocating pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100337031C (en) |
| WO (1) | WO2007041935A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016295A (en) * | 2012-12-14 | 2013-04-03 | 涂晶 | High pressure sump oil pumping device |
| CN103225606A (en) * | 2013-03-21 | 2013-07-31 | 无锡市恒达矿山机械有限公司 | Double-acting type reciprocating pump |
| CN104929894A (en) * | 2015-06-09 | 2015-09-23 | 安庆卡尔特压缩机有限公司 | Novel compressor |
| CN106440301A (en) * | 2016-12-06 | 2017-02-22 | 叶能 | Intelligent hydraulic pressure house |
| CN106764444A (en) * | 2017-01-06 | 2017-05-31 | 汪梦林 | Concrete pump delivery line lubricating coupler |
| CN107842480A (en) * | 2017-12-12 | 2018-03-27 | 浙江通森环保设备科技有限公司 | A kind of sewage pump |
| CN112343785A (en) * | 2020-11-03 | 2021-02-09 | 上海齐耀动力技术有限公司 | Duplex hydraulic drive reciprocating pump with mutually control valves |
| CN112879259A (en) * | 2020-12-31 | 2021-06-01 | 宁波得利时泵业有限公司 | Intelligent conveying system of particle pump and test run method thereof |
| CN113332592A (en) * | 2021-06-04 | 2021-09-03 | 丰凯医疗器械（上海）有限公司 | Catheter pump assembly |
| CN114801174A (en) * | 2022-03-26 | 2022-07-29 | 共享智能装备有限公司 | Liquid adding device and operation process thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504017B (en) * | 2017-06-09 | 2023-10-27 | 上海航兴机电工程有限公司 | Hydraulic oil intelligent purification system of hydraulic gate hydraulic system |
| CN107738698A (en) * | 2017-11-07 | 2018-02-27 | 中国重汽集团南充海乐机械有限公司 | A kind of durable in use, lightweight hydraulic lifting system |
| CN108843473A (en) * | 2018-07-09 | 2018-11-20 | 郑州航空工业管理学院 | More check valve combinations are adaptive mutually to open the reciprocal fueller of energy conservation in advance |
| CN109854476B (en) * | 2019-03-28 | 2023-09-19 | 宁波合力机泵股份有限公司 | Dynamic air inlet liquid conveying device |
| CN114623385A (en) * | 2020-12-14 | 2022-06-14 | 辽宁维扬机械有限公司 | Bag type pipeline paste pump |
| CN115126673B (en) * | 2022-07-21 | 2024-05-03 | 镇江宝城注浆设备有限公司 | Reciprocating pump with protection function |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101341A (en) * | 1987-05-21 | 1988-02-03 | 张庆玉 | Oil pressure reciprocating vacuum pump and compressor |
| JPH07102305B2 (en) * | 1988-06-29 | 1995-11-08 | 株式会社ササクラ | Reverse osmosis membrane concentrator |
| ES2034550T3 (en) * | 1988-10-18 | 1993-04-01 | Friedrich Wilh. Schwing Gmbh | DEVICE FOR THE PNEUMATIC DISTRIBUTION OF CONCRETE TRANSPORTED BY HYDROMECHANICAL MEANS IN DENSE FLOW. |
| CN1013784B (en) * | 1989-03-22 | 1991-09-04 | 王全章 | Fully hydraulic oil pump |
| GB9912233D0 (en) * | 1998-12-04 | 1999-07-28 | British Gas Plc | Hydrualically driven compressor |
| CN1094564C (en) * | 1999-09-18 | 2002-11-20 | 彭利 | Fluid transmission type reciprocating hydraulic pump |
| CN1326050A (en) * | 2000-05-31 | 2001-12-12 | 刘海生 | Linear reciprocating compressor |
| US6609898B1 (en) * | 2001-10-01 | 2003-08-26 | Putzmeister Inc. | Process and device for pumping compressible materials with reduced pressure pulsation |
| CN2570495Y (en) * | 2002-08-04 | 2003-09-03 | 房兆俊 | Actuating apparatus of cylinder-and-piston type reciprocating pump |
| CN2641317Y (en) * | 2003-09-18 | 2004-09-15 | 李竞 | Reciproating type gas compressor |
-
2005
- 2005-10-13 CN CNB200510094777XA patent/CN100337031C/en not_active Expired - Fee Related
-
2006
- 2006-09-25 WO PCT/CN2006/002502 patent/WO2007041935A1/en active Application Filing
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016295B (en) * | 2012-12-14 | 2015-06-10 | 涂晶 | High pressure sump oil pumping device |
| CN103016295A (en) * | 2012-12-14 | 2013-04-03 | 涂晶 | High pressure sump oil pumping device |
| CN103225606A (en) * | 2013-03-21 | 2013-07-31 | 无锡市恒达矿山机械有限公司 | Double-acting type reciprocating pump |
| CN104929894A (en) * | 2015-06-09 | 2015-09-23 | 安庆卡尔特压缩机有限公司 | Novel compressor |
| CN106440301B (en) * | 2016-12-06 | 2022-04-15 | 叶能 | Intelligent hydraulic room |
| CN106440301A (en) * | 2016-12-06 | 2017-02-22 | 叶能 | Intelligent hydraulic pressure house |
| CN106764444A (en) * | 2017-01-06 | 2017-05-31 | 汪梦林 | Concrete pump delivery line lubricating coupler |
| CN107842480A (en) * | 2017-12-12 | 2018-03-27 | 浙江通森环保设备科技有限公司 | A kind of sewage pump |
| CN112343785A (en) * | 2020-11-03 | 2021-02-09 | 上海齐耀动力技术有限公司 | Duplex hydraulic drive reciprocating pump with mutually control valves |
| CN112879259A (en) * | 2020-12-31 | 2021-06-01 | 宁波得利时泵业有限公司 | Intelligent conveying system of particle pump and test run method thereof |
| CN113332592A (en) * | 2021-06-04 | 2021-09-03 | 丰凯医疗器械（上海）有限公司 | Catheter pump assembly |
| CN114801174A (en) * | 2022-03-26 | 2022-07-29 | 共享智能装备有限公司 | Liquid adding device and operation process thereof |
| CN114801174B (en) * | 2022-03-26 | 2023-12-29 | 共享智能装备有限公司 | Liquid adding device and operation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007041935A1 (en) | 2007-04-19 |
| CN100337031C (en) | 2007-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100337031C (en) | Hydraulic reciprocating pump | |
| US11454351B2 (en) | Multiphase flow mixed delivery method employing reciprocating driving performed by liquid in two chambers and device thereof | |
| CN100567730C (en) | Hydraulic drive fluid pump | |
| CN201241806Y (en) | Hydraulic gas compressor | |
| CA2677178A1 (en) | Hydraulic oil well pumping apparatus | |
| US10612531B2 (en) | Hydraulically-driven double-acting mud pump | |
| WO2016134464A1 (en) | Drive mechanism module for a reciprocating pump | |
| CN101603527A (en) | A kind of emulsion pump testing system | |
| CN102305203A (en) | Linear motor-driven plunger pump | |
| CN102889190B (en) | A kind of can the mine-used emulsion pump of automatic preparation emulsified liquid | |
| CN200952458Y (en) | Gas and liquid compound pump | |
| CN202732552U (en) | Oil-water conversion variable emulsion pump station | |
| CN101029634A (en) | Multi-purpose hydraulic negative-feedback pump | |
| CN113431813B (en) | Hydraulic system assembly mechanism for field oil extraction and reciprocating oil pumping control | |
| CN2061218U (en) | Long-stroke hydraulic type oil pumping machine | |
| CN205370884U (en) | Many hydraulic cylinders of plunger type combination slush pump | |
| CN201381976Y (en) | Hydraulic control system of aggregate concrete pump | |
| CN212055108U (en) | Mechanical baffle single cam displacement pump | |
| CN107842480A (en) | A kind of sewage pump | |
| CN114087151A (en) | Hand-held cleaning machine with power device | |
| CN1673534A (en) | Well dynamic direct-driven plunger oil-well pump | |
| CN202580566U (en) | Hydraulic-driving lubrication pump | |
| CN2479243Y (en) | Hydraulic driven oil-gas mixing transfer pump | |
| CN2533291Y (en) | Reciprocating pump | |
| CN2883722Y (en) | Composite pump combined motor with pump function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |