CN106704134A - Hydraulic free piston multi-phase mixed transportation device - Google Patents
Hydraulic free piston multi-phase mixed transportation device Download PDFInfo
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- CN106704134A CN106704134A CN201710152558.5A CN201710152558A CN106704134A CN 106704134 A CN106704134 A CN 106704134A CN 201710152558 A CN201710152558 A CN 201710152558A CN 106704134 A CN106704134 A CN 106704134A
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- Prior art keywords
- cylinder
- oil
- piston
- conveying
- hydraulic
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Classifications
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- 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
- F04B9/117—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 the pumping members not being mechanically connected to each other
- F04B9/1172—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 the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor
- F04B9/1174—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 the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor with fluid-actuated inlet or outlet valve
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- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a hydraulic free piston multi-phase mixed transportation device, comprising conveying cylinders, a check valve, a main oil pump, a steering valve and a limiting switch; there are two conveying cylinders, which respectively comprise cylinder bodies and free pistons arranged in the cylinder bodies; the bottom part of the cylinder bodies of the conveying cylinders are respectively equipped with two check valves; along with the vertical movement of the free pistons in the cylinder bodies, only one check valve is opened to absorb or discharge fluid; the top parts of the cylinder bodies of the conveying cylinders are connected with a pipeline; the main oil pump is arranged on the pipeline and used for conveying the hydraulic oil in the cylinder body of one conveying cylinder to the cylinder body of the other one conveying cylinder; when the free piston is upwards moved and contacted to the limiting switch, the control unit of the limiting switch controls the rotating direction of the steering valve, and direction of conveying the hydraulic oil by the main oil pump is changed. The hydraulic free piston multi-phase mixed transportation device can meet the demand of the closed mixed transportation of crude oil.
Description
Technical field
The present invention relates to multi-phase mixed delivering field, more particularly to a kind of hydraulic free-piston multiphase mixed transportation device.
Background technology
A certain amount of natural gas and water and solid particle are usually associated with oil exploitation, in output content from oil well.For reality
Wellhead back pressure is now reduced, increased crude output, improve exploiting economy benefit and is reached the purpose of oil-gas closed conveying, oil gas is mixed
Transferring technology is more and more universal to be applied in oil and gas development.
Oil and gas multiphase flow technology is a kind of new technology for carrying out mixing crude oil output object and being pressurized and be delivered directly to multi-purpose station, with
Traditional DP technology compares, and can less build a gas transmission line, and reduce oil, gas separation equipment.For offshore oilfield, can
To reduce platform area.Oil and gas multiphase flow technology can make the energy be fully used, and environmental aspect can be improved again, its it is economical and
Social benefit is very considerable.
Screw pump, but principle and structure based on screw pump are used mostly in current oil extraction process, it is simultaneously uncomfortable
Situation for gas liquid ratio operating mode higher and containing solid particle, and efficiency also has much room for improvement with reliability.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of hydraulic free-piston multiphase mixed transportation device, can meet original
The demand of oily closed mixed transportation.
Therefore, technical scheme is as follows：
A kind of hydraulic free-piston multiphase mixed transportation device, including conveying cylinder, check-valves, main oil pump, reversal valve and spacing open
Close；
The conveying cylinder has two, respectively including cylinder body and the free-piston being arranged in cylinder body；The cylinder of the conveying cylinder
Body bottom is separately installed with two check-valves, and with cylinder body, free-piston moves up and down only one opening, suction or
Discharge fluid；
The cylinder body top of described two conveying cylinders is connected by pipeline；The main oil pump is arranged on the pipeline, is used for
The hydraulic oil that one conveys in cylinder cylinder body is transported in the cylinder body of another conveying cylinder；
The reversal valve is arranged on the pipeline of the described two conveying cylinders of connection；
The limit switch has two, is separately positioned on the cylinder body top of the conveying cylinder；When the free-piston is upward
When motion contact is to limit switch, the control unit of limit switch controls the reversal valve to turn to, and converts the main oil pump conveying
The direction of hydraulic oil.
In order to solve the problems, such as that leakage causes conveying stroke to diminish to hydraulic oil during conveying between two conveying cylinders, the hydraulic pressure
Free-piston multiphase mixed transportation device also includes overflow valve, oil feeding reservoir and slippage pump；The oil feeding reservoir is used to store hydraulic oil, described
Oil feeding reservoir is connected with two conveying cylinder tops respectively, and the slippage pump is arranged between oil feeding reservoir and conveying cylinder, for by described in
Hydraulic oil in oil feeding reservoir is transported in the cylinder body of the conveying cylinder；Overflow is additionally provided between the conveying cylinder and oil feeding reservoir
Valve, when hydraulic oil overflows in cylinder body, overflow valve is opened, and hydraulic oil is back to oil feeding reservoir.
Become alternatively, the hydraulic free-piston multiphase mixed transportation device also include liquid level detector, oil feeding reservoir and
Slippage pump；The oil feeding reservoir is used to store hydraulic oil, and the oil feeding reservoir is connected with two conveying cylinder tops respectively, the slippage pump
It is arranged between oil feeding reservoir and conveying cylinder；The liquid level detector is arranged in cylinder body；When The hydraulic oil is low in the cylinder body
When preset value, liquid level detector feedback information, by manual or automatic unlatching slippage pump, by the hydraulic pressure in the oil feeding reservoir
Oil is transported in the conveying cylinder.
Become alternatively, the hydraulic free-piston multiphase mixed transportation device also includes displacement detector, oil feeding reservoir and benefit
Oil pump；The oil feeding reservoir is used to store hydraulic oil, and the oil feeding reservoir is connected with two conveying cylinder tops respectively, and the slippage pump sets
Put between oil feeding reservoir and conveying cylinder；The displacement detector is arranged on cylinder body, the position for detecting free-piston, when certainly
When moving down distance less than preset value by piston, displacement detector feedback information, by manual or automatic unlatching slippage pump, will be described
Hydraulic oil in oil feeding reservoir is transported in the conveying cylinder.
Further, the cylinder body of the conveying cylinder is divided into upper and lower two parts, and from terms of vertical section, the width of upper part is less than bottom
The width for dividing；The free-piston is made up of the connecting rod of two piston bodies of upper and lower two piston bodies and connection；Position is in upper work
Clearance gauge cun matches with the inner chamber of the upper part of conveying cylinder, the inner chamber phase of piston size of the position under and the lower part for conveying cylinder
Matching.
The hydraulic free-piston multiphase mixed transportation device has the beneficial effect that：
1) realize oil-gas ratio mixed defeated in the range of 0-100%, under any ratio all without occur overcompression and owe
Compression condition, efficiency high；
2) suction capacity is strong, can reach discharge pressure very high, and insensitive to fluid viscosity, cleannes, it is possible to achieve
Gas, liquid, the blending transportation of solid particle；
3) operation of device inner carrier is slow, and all parts are hardly damaged, and reliability is high；
4) most of parts are hydraulic pressure standard component in device, and cost is easy to control, and procurement cycle is short, and interchangeability is good.
5) flexibly, motor, engine, hydraulic motor, air motor can drive the device type of drive, be suitable for each
Plant application scenario.
Brief description of the drawings
Fig. 1 is a kind of working state figure of the hydraulic free-piston multiphase mixed transportation device that embodiment 2 is provided；
Fig. 2 is the working state figure after the reversal valve commutation of hydraulic free-piston multiphase mixed transportation device in Fig. 1；
Fig. 3 is the structural representation of hydraulic free-piston multiphase mixed transportation device in embodiment 5.
Specific embodiment
Technical scheme is described in detail below in conjunction with drawings and Examples.
Embodiment 1
A kind of hydraulic free-piston multiphase mixed transportation device, including conveying cylinder 1, check-valves 6, main oil pump 8, reversal valve 7 and limit
Bit switch 5；Conveying cylinder 1 has two, respectively including cylinder body and the free-piston 2 being arranged in cylinder body；Convey the cylinder base of cylinder 1
Two check-valves 6 are separately installed with, free-piston 2 moves up and down only one opening with cylinder body, suction or discharged
Fluid；The cylinder body top of two conveying cylinders 1 is connected by pipeline；Main oil pump 8 is arranged on pipeline, for conveying cylinder cylinder by one
Internal hydraulic oil is transported in the cylinder body of another conveying cylinder；Reversal valve 7 is arranged on two pipelines of conveying cylinder 1 of connection；
Limit switch 5 has two, is separately positioned on the cylinder body top of conveying cylinder 1；When the upward motion contact of free-piston 2 to limit switch
When 5, the control unit control reversal valve 7 of limit switch 5 is turned to, the direction of conversion main oil pump 8 delivery hydraulic pressure oil.
Shut-off valve 10 is also equipped with it will convey the pipeline that the bottom of cylinder 1 is connected with extraneous liquid to be conveyed, for stopping
Prevent downstream fluid from flowing back when machine state or maintenance.
When using, the hydraulic oil that right side is conveyed in cylinder 1 is pumped to main oil pump the conveying cylinder in left side；Right side working cylinder is used as suction
Enter cylinder, cylinder inner carrier is up, cylinder base check-valves is opened, another check-valves closure sucks fluid；Left side conveys cylinder as pressure
Contracting, discharge cylinder, cylinder inner carrier are descending, and one check-valves of cylinder base is unidirectionally closed, and another check-valves is on the downside of cylinder body inner carrier
Work cavity pressure is opened after reaching discharge pressure, fluid in discharge cavity；The cylinder inner carrier of right side working cylinder is up to encounter cylinder
Internal limit switch, reversal valve is started by control unit, and oil circuit is commutated；Right side conveying cylinder is converted to compression, discharge cylinder；
Left side conveying cylinder is converted to suction cylinder；Hydraulic oil is delivered to right side conveying cylinder by main oil pump from left side conveying cylinder, while left side is defeated
Cylinder is sent to suck liquid to be conveyed；Right side conveying cylinder discharges liquid to be conveyed.Piston stroking upward in left side conveying cylinder triggers spacing opening
Close, reversal valve is started by control unit, oil circuit is commutated；The work shape of continuous suction, compression, discharge is back and forth reached with this
State.
The hydraulic free-piston multiphase mixed transportation device uses control piston up-down to suck or discharge liquid to be conveyed
Mode realize the conveying of liquid, the demand of crude oil closed mixed transportation can be met, solve screw pump be unsuitable for conveying gas liquid ratio compared with
The requirement of fluid high.
Embodiment 2
Difference with hydraulic free-piston multiphase mixed transportation device in embodiment 1 is：Also include overflow valve 3, the and of oil feeding reservoir 4
Slippage pump 9；Oil feeding reservoir 4 is used to store hydraulic oil, and oil feeding reservoir 4 is connected with two tops of conveying cylinder 1 respectively, and slippage pump 9 is arranged on
Between oil feeding reservoir 4 and conveying cylinder 1, for the hydraulic oil in oil feeding reservoir 4 to be transported in the cylinder body of conveying cylinder 1；Conveying cylinder 1 and benefit
Overflow valve 3 is additionally provided between fuel tank 4, when hydraulic oil overflows in cylinder body, overflow valve 3 is opened, and hydraulic oil is back to oil feeding reservoir
4.Such as Fig. 1, shown in 2.
Leakage causes to convey the problem that stroke diminishes when being conveyed between two conveying cylinders that embodiment solves hydraulic oil.
When using, the hydraulic oil that right side is conveyed in cylinder 1 is pumped to main oil pump the conveying cylinder in left side；Right side working cylinder is used as suction
Enter cylinder, cylinder inner carrier is up, cylinder base check-valves is opened, another check-valves closure sucks fluid；Left side conveys cylinder as pressure
Contracting, discharge cylinder, cylinder inner carrier are descending, and one check-valves of cylinder base is unidirectionally closed, and another check-valves is on the downside of cylinder body inner carrier
Work cavity pressure is opened after reaching discharge pressure, fluid in discharge cavity；
To prevent entrained gas in hydraulic system, hydraulic oil is filled into by system from oil feeding reservoir by slippage pump all the time, it is unnecessary
Hydraulic oil oil feeding reservoir is flowed back to by each overflow valve for conveying cylinder cylinder body top；
When compression, discharge cylinder inner carrier reach bottom dead centre, piston both sides volume no longer changes, and due to repairing, inhales
Enter cylinder and do not reach top dead-centre also, oil pump works on, suction cylinder continues outside fuel feeding, cylinder inner carrier continues up, compression, discharge
Hydraulic oil overflow in cylinder, until the piston stroking upward in suction cylinder triggers limit switch, is started by control unit and changed to fuel tank
To valve, oil circuit is commutated；As shown in Figure 2；
Right side conveying cylinder is converted to compression, discharge cylinder；Left side conveying cylinder is converted to suction cylinder；Main oil pump is by hydraulic oil a from left side
Side conveying cylinder is delivered to right side conveying cylinder, while left side conveying cylinder sucks liquid to be conveyed；Right side conveying cylinder discharges liquid to be conveyed
Body.When compression discharge cylinder inner carrier reaches bottom dead centre, piston both sides volume no longer changes, and due to repairing, suction cylinder is also
Top dead-centre is not reached, oil pump works on, suction cylinder continues outside fuel feeding, cylinder inner carrier continues up, in compression discharge cylinder
Hydraulic oil overflow, until the piston stroking upward in suction cylinder triggers limit switch, reversal valve is started by control unit to fuel tank, will
Oil circuit commutates；The working condition of continuous suction, compression, discharge is back and forth reached with this.
Embodiment 3
Difference with hydraulic free-piston multiphase mixed transportation device in embodiment 1 is：Also include liquid level detector, repairing
Case 4 and slippage pump 9；Oil feeding reservoir 4 is used to store hydraulic oil, and oil feeding reservoir 4 is connected with two tops of conveying cylinder 1 respectively, and slippage pump 9 sets
Put between oil feeding reservoir 4 and conveying cylinder 4；Liquid level detector is arranged in cylinder body；When The hydraulic oil is less than preset value in cylinder body
When, the hydraulic oil in oil feeding reservoir, by manual or automatic unlatching slippage pump, is transported to conveying by liquid level detector feedback information
In cylinder.
It is defeated between two conveying cylinders this example provides a kind of solution hydraulic oil different from provided in embodiment 2
Leakage causes to convey the different technical scheme of the problem that stroke diminishes when sending.
Embodiment 4
Difference with hydraulic free-piston multiphase mixed transportation device in embodiment 1 is：Also include displacement detector, oil feeding reservoir
4 and slippage pump 9；Oil feeding reservoir 4 is used to store hydraulic oil, and oil feeding reservoir 4 is connected with two tops of conveying cylinder 1 respectively, and slippage pump 9 is set
Between oil feeding reservoir 9 and conveying cylinder 1；Displacement detector is arranged on cylinder body, the position for detecting free-piston, when free work
When plug moves down distance less than preset value, displacement detector feedback information, by manual or automatic unlatching slippage pump, by oil feeding reservoir
Hydraulic oil be transported to conveying cylinder in.
It is defeated between two conveying cylinders this example provides a kind of solution hydraulic oil different from provided in embodiment 2
Leakage causes to convey the different technical scheme of the problem that stroke diminishes when sending.
Embodiment 5
Difference with hydraulic free-piston multiphase mixed transportation device in embodiment 1 is：The cylinder body for conveying cylinder 1 is divided into upper and lower two
Part, from terms of vertical section, the width of the width less than lower part of upper part；Free-piston 2 is by upper and lower two piston bodies and connection
Two connecting rods of piston body are constituted；Position matches in upper piston size with the inner chamber of the upper part of conveying cylinder, and position is under
Piston size match with the inner chamber of lower part of conveying cylinder.
This example provides a kind of shape of block of the conveying cylinder of different structure, great Rong is realized using a small amount of hydraulic oil
The conveying of the liquid of amount.According to different conveying liquid demands, the ratio of the ratio of adjustable cylinder body top and the bottom, and lateral dimension
Example is reached using needs.
Any one additional technical scheme in embodiment 2~4 can also be combined with the embodiment simultaneously, satisfaction is used
Demand.
Claims (5)
1. a kind of hydraulic free-piston multiphase mixed transportation device, including conveying cylinder (1), check-valves (6), main oil pump (8), reversal valve
And limit switch (5) (7)；It is characterized in that：
Conveying cylinder (1) has two, respectively including cylinder body and the free-piston (2) being arranged in cylinder body；Conveying cylinder (1)
Cylinder base be separately installed with two check-valves (6), with cylinder body, free-piston (2) moves up and down only one and beats
Open, suck or discharge fluid；
The cylinder body top of described two conveyings cylinder (1) is connected by pipeline；The main oil pump (8) is arranged on the pipeline, is used
It is transported in the cylinder body of another conveying cylinder in conveying one in the hydraulic oil in cylinder cylinder body；
The reversal valve (7) is on the pipeline for connecting described two conveyings cylinder (1)；
The limit switch (5) has two, is separately positioned on the cylinder body top of conveying cylinder (1)；When the free-piston (2)
When upward motion contact is to limit switch (5), the control unit of limit switch (5) controls the reversal valve (7) to turn to, and converts institute
State the direction of main oil pump (8) delivery hydraulic pressure oil.
2. hydraulic free-piston multiphase mixed transportation device as claimed in claim 1, it is characterised in that：Also include overflow valve (3), repairing
Case (4) and slippage pump (9)；The oil feeding reservoir (4) conveys cylinder (1) with two respectively for storing hydraulic oil, the oil feeding reservoir (4)
Top is connected, and the slippage pump (9) is arranged between oil feeding reservoir (4) and conveying cylinder (1), for by the oil feeding reservoir (4)
Hydraulic oil is transported in the cylinder body of conveying cylinder (1)；Overflow valve is additionally provided between conveying cylinder (1) and oil feeding reservoir (4)
(3), when hydraulic oil overflows in cylinder body, overflow valve (3) is opened, and hydraulic oil is back to oil feeding reservoir (4).
3. hydraulic free-piston multiphase mixed transportation device as claimed in claim 1, it is characterised in that：Also include liquid level detector,
Oil feeding reservoir (4) and slippage pump (9)；The oil feeding reservoir (4) conveys with two respectively for storing hydraulic oil, the oil feeding reservoir (4)
Cylinder (1) top is connected, and the slippage pump (9) is arranged between oil feeding reservoir (4) and conveying cylinder (4)；The liquid level detector sets
Put in cylinder body；When The hydraulic oil is less than preset value in the cylinder body, liquid level detector feedback information, by manually or certainly
It is dynamic to open slippage pump, the hydraulic oil in the oil feeding reservoir is transported in the conveying cylinder.
4. hydraulic free-piston multiphase mixed transportation device as claimed in claim 1, it is characterised in that：Also include displacement detector, mend
Fuel tank (4) and slippage pump (9)；The oil feeding reservoir (4) conveys cylinders with two respectively for storing hydraulic oil, the oil feeding reservoir (4)
(1) top is connected, and the slippage pump (9) is arranged between oil feeding reservoir (9) and conveying cylinder (1)；The displacement detector is arranged on
On cylinder body, the position for detecting free-piston, when free-piston moves down distance less than preset value, displacement detector feedback letter
Breath, by manual or automatic unlatching slippage pump, the hydraulic oil in the oil feeding reservoir is transported in the conveying cylinder.
5. the hydraulic free-piston multiphase mixed transportation device as described in any one in Claims 1 to 4, it is characterised in that：It is described defeated
The cylinder body of cylinder (1) is sent to be divided into upper and lower two parts, from terms of vertical section, the width of the width less than lower part of upper part；The freedom
Piston (2) is made up of the connecting rod of two piston bodies of upper and lower two piston bodies and connection；Position is in upper piston size and conveying cylinder
The inner chamber of upper part match, piston size of the position under matches with the inner chamber of the lower part of conveying cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152558.5A CN106704134A (en) | 2017-03-15 | 2017-03-15 | Hydraulic free piston multi-phase mixed transportation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152558.5A CN106704134A (en) | 2017-03-15 | 2017-03-15 | Hydraulic free piston multi-phase mixed transportation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106704134A true CN106704134A (en) | 2017-05-24 |
Family
ID=58884738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710152558.5A Pending CN106704134A (en) | 2017-03-15 | 2017-03-15 | Hydraulic free piston multi-phase mixed transportation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106704134A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050037A (en) * | 2018-01-15 | 2018-05-18 | 自贡通达机器制造有限公司 | Gas-liquid pressure-boosting mixing pump and gas-liquid mixing conveyance |
| WO2022143592A1 (en) * | 2020-12-31 | 2022-07-07 | 广东管辅能源科技有限公司 | Measurement method and device for multiphase flow mixed transportation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919597A (en) * | 1988-06-15 | 1990-04-24 | Specified Equipment Systems Co., Inc. | Pump apparatus for multiple component fluids |
| CN2570495Y (en) * | 2002-08-04 | 2003-09-03 | 房兆俊 | Actuating apparatus of cylinder-and-piston type reciprocating pump |
| CN2627237Y (en) * | 2003-04-08 | 2004-07-21 | 朱红渭 | Piston type hydraulic pump |
| CN1763385A (en) * | 2005-10-28 | 2006-04-26 | 三一重工股份有限公司 | Valve oil supplement method for series connection cylinders and apparatus therefor |
| CN101078395A (en) * | 2007-06-21 | 2007-11-28 | 吕权 | Highly effective hydraulic drive fluid pump |
| EP2647842A1 (en) * | 2011-09-09 | 2013-10-09 | Zoomlion Heavy Industry Science and Technology Co., Ltd. | Method, apparatus, and system for controlling pumping direction-switching for use in pumping apparatus |
| CN104454796A (en) * | 2014-11-02 | 2015-03-25 | 中冶东方工程技术有限公司 | Oil supplementation system |
| CN206582071U (en) * | 2017-03-15 | 2017-10-24 | 吉孚艾（天津）压缩***技术有限公司 | Hydraulic free-piston multiphase mixed transportation device |
-
2017
- 2017-03-15 CN CN201710152558.5A patent/CN106704134A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919597A (en) * | 1988-06-15 | 1990-04-24 | Specified Equipment Systems Co., Inc. | Pump apparatus for multiple component fluids |
| CN2570495Y (en) * | 2002-08-04 | 2003-09-03 | 房兆俊 | Actuating apparatus of cylinder-and-piston type reciprocating pump |
| CN2627237Y (en) * | 2003-04-08 | 2004-07-21 | 朱红渭 | Piston type hydraulic pump |
| CN1763385A (en) * | 2005-10-28 | 2006-04-26 | 三一重工股份有限公司 | Valve oil supplement method for series connection cylinders and apparatus therefor |
| CN101078395A (en) * | 2007-06-21 | 2007-11-28 | 吕权 | Highly effective hydraulic drive fluid pump |
| EP2647842A1 (en) * | 2011-09-09 | 2013-10-09 | Zoomlion Heavy Industry Science and Technology Co., Ltd. | Method, apparatus, and system for controlling pumping direction-switching for use in pumping apparatus |
| CN104454796A (en) * | 2014-11-02 | 2015-03-25 | 中冶东方工程技术有限公司 | Oil supplementation system |
| CN206582071U (en) * | 2017-03-15 | 2017-10-24 | 吉孚艾（天津）压缩***技术有限公司 | Hydraulic free-piston multiphase mixed transportation device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050037A (en) * | 2018-01-15 | 2018-05-18 | 自贡通达机器制造有限公司 | Gas-liquid pressure-boosting mixing pump and gas-liquid mixing conveyance |
| WO2022143592A1 (en) * | 2020-12-31 | 2022-07-07 | 广东管辅能源科技有限公司 | Measurement method and device for multiphase flow mixed transportation |
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Application publication date: 20170524 |