CN202732552U - Oil-water conversion variable emulsion pump station - Google Patents

Oil-water conversion variable emulsion pump station Download PDF

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Publication number
CN202732552U
CN202732552U CN 201220344342 CN201220344342U CN202732552U CN 202732552 U CN202732552 U CN 202732552U CN 201220344342 CN201220344342 CN 201220344342 CN 201220344342 U CN201220344342 U CN 201220344342U CN 202732552 U CN202732552 U CN 202732552U
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CN
China
Prior art keywords
valve
hydraulic
pressure
oil
pressure pump
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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 - Fee Related
Application number
CN 201220344342
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Chinese (zh)
Inventor
范天锦
陈国安
范文毅
范文灏
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XUZHOU MINGSHUO MACHINERY TECHNOLOGY Co Ltd
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XUZHOU MINGSHUO MACHINERY TECHNOLOGY Co Ltd
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Priority to CN 201220344342 priority Critical patent/CN202732552U/en
Application granted granted Critical
Publication of CN202732552U publication Critical patent/CN202732552U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model disclose an oil-water conversion variable emulsion pump station, which mainly comprises a power device, a shunting and reversing valve bank, a plurality of oil-water converters and an auxiliary element, wherein the power device comprises two explosion-proof motors, a variable hydraulic oil pump and a low pressure water pump; the outlet of the variable hydraulic oil pump is connected in parallel with an unloading overflow valve and a safety valve; the outlet of the low-pressure water pump is connected in parallel with a low-pressure overflow valve; the outlet of the variable hydraulic oil pump is connected in series with a one-way valve; the shunting and reversing valve bank comprises a shunting valve and a reversing valve; pressure oil output by the variable hydraulic oil pump is distributed to the oil-water converters averagely or proportionally by using the shunting valve; at least one oil-water converter is provided; and the quantity of the reversing valve is equal to that of the oil-water converters. Due to the adoption of the oil-water conversion variable emulsion pump station, the matching power of a driving motor can be effectively lowered, and the requirement of hydraulic support equipment on ultra-high pressure or ultra-large flow can be met by adopting oil-water converters of different area ratios; and the oil-water conversion variable emulsion pump station has the advantages of simple structure, small size, low weight, high energy saving property, high suitability, high volume efficiency and stepless and continuous control over displacement.

Description

A kind of profit converted variable emulsion power pack
Technical field
The utility model relates to a kind of emulsion power pack, particularly relates to a kind of various change discharge capacity emulsion power packs that transmit the machinery of motion and power take emulsified liquid or pure water as the power transmission medium, by its pressure energy that are applicable to.
Background technique
The emulsion pump for coal mine station is the power equipment to the hydraulic prop discharge pressure liquid of the hydraulic support of working face or conventional face, that existing emulsion power pack and emulsion pump are carried out is state coal industry standard MT/T188.2-2000, it adopts three plungers or the five plunger horizontal type structures of the transmission of crankshaft-link rod slide block, and its discharge capacity is changeless.Because the used hydraulic prop equipment in down-hole, not with before top board contacts, often need the liquid of large flow, low-pressure to make its quick rise at its top cover; And at top cover with after top board contacts, the pressure of hydraulic prop and hydraulic support is increasing, at this moment needs the liquid of high pressure, small flow, so that the setting pressure of support apparatus reaches designing requirement; Obviously, the changeless emulsion pump of the widely used flow in down-hole can't satisfy this requirement at present, and in the first support stage of hydraulic prop and hydraulic support, the high-pressure emulsion major part of pump output overflows back emulsion box, pressure energy is converted into heat energy, and a large amount of electric energy waste.In addition, the operating time of the equipment actual demand feed flows such as hydraulic support only accounts for about 1/3 of emulsion power pack working time, and its frequency of utilization and utilization ratio are lower, have wasted a large amount of electric energy; Emulsion power pack is in operation, though automatic relieving valve is arranged, has all the time larger load, and motor is run with load always, has greatly shortened the working life of pump, has increased the maintenance of equipment; And because subsurface environment is poor, emulsified liquid is easily dirty, so that the action of automatic relieving valve is very unreliable, in the situation of not fluid injection, pump may be in the heavy service, and operational noise is large, and the power consumption waste is large.For this reason, people propose the various technical measures that existing emulsion pump is carried out reducing energy consumption: (1) adopts the emulsified liquid flow signal in the Hall integrated component detection main supply liquid pipeline, when working surface during without liquid, realize the low pressurized overflow of pump by " energy-saving controller ", make the unloading pressure of original feather valve on the emulsion box be a bit larger tham the set pressure of main relief valve in the controller, only play the security of system valve action; The energy-saving effect of this measure is desirable not enough; (2) adopt unloading manner in unique hydraulic control, at the liquid sucting valve of emulsion pump a hydraulic control piston is installed, make it to become a Pilot operated check valve; When working surface was used liquid, the liquid sucting valve effect of Pilot operated check valve and conventional pump was just the same, but when working surface stops to use liquid, move on the piston below the system pressure rising, liquid sucting valve, back down the liquid sucting valve spool, the liquid that emulsion pump sucks is directly discharged by liquid sucting port, thereby has realized the unloading of pump; That the method also exists is strong to various adaptability for working condition, recover the problem such as pressure transient; (3) employing has a grade variable emulsion power pack system, though the energy-conservation purpose of output small flow when exporting large flow, high pressure when realizing low-pressure, but still have large moment hydraulic shock, can not fundamentally reduce the pumping plant energy consumption; (4) adopt the modes such as valve formula variable or VFC to realize the continuous adjusting of emulsion pump flow, though can reach good energy-saving effect, its stroking mechanism is complicated, do very large change to existing plunger pump design; Particularly now technical measures change fundamentally that the volume that existing emulsion pump exists is large, the motor mesh power is large, impact shock is large with noise, realize the problems such as ultrahigh pressure and super-flow difficulty, are difficult to adapt to large-scale construction needs with the super sized type mine of modern times.Therefore, be badly in need of a kind of energy-saving emulsifying pump station that adopts brand new and principle.
Summary of the invention
Technical problem: the purpose of this utility model is the deficiency that overcomes in the prior art, provide a kind of simple in structure, volume is little, lightweight, energy-conservation, strong adaptability, volumetric efficiency are high, profit converted variable emulsion power pack that can stepless control discharge capacity.
Technological scheme: profit converted variable emulsion power pack of the present utility model comprises power plant, shunting and selector valve group, profit transducer; Described power plant comprise two anti-explosion motors, variable hydraulic-pressure pump, low-pressure pump, two anti-explosion motors are connected with low-pressure pump with the variable hydraulic-pressure pump respectively by coupling, described variable hydraulic-pressure pump is separate unit hydraulic-pressure pump, duplex hydraulic-pressure pump or three hydraulic-pressure pumps, and the variable hydraulic-pressure pump is parallel with unloading overflow valve and safety valve; The outlet port of low-pressure pump is parallel with low pressure relief valve; The outlet port of variable hydraulic-pressure pump is serially connected with one-way valve; Described shunting and selector valve group are installed in variable hydraulic oil delivery side of pump, shunting comprises diverter valve and selector valve with the selector valve group, diverter valve is with the average or proportional profit transducer of distributing to of pressure oil of variable hydraulic-pressure pump output, the quantity of profit transducer is a plurality of, and the quantity of selector valve is identical with the quantity of profit transducer; The profit transducer comprise intermediate liquid compressing cylinder, symmetry be located at intermediate liquid compressing cylinder both sides about two emulsification fluid cylinders, about be arranged with two feed liquor one-way valves and two the fluid one-way valves that are connected with imbibition pipeline T and pressure piping P on the turnover pipeline of two emulsification fluid cylinders; The intermediate liquid compressing cylinder is two bar two-way ram cylinders, the two ends of its piston rod respectively with about the piston of two emulsification fluid cylinders be fixedly linked, two hydraulic fluid ports on the intermediate liquid compressing cylinder are connected with two actuator ports of selector valve respectively by the road; The return opening of selector valve is connected with hydraulic oil container by return tube; The liquid return hole of emulsification fluid cylinder is connected with emulsion box by liquid return pipe; The pressure piping P that links to each other with the emulsification fluid cylinder is provided with accumulator, pressure gauge.
The net sectional area of described intermediate liquid compressing cylinder is 1:2 ~ 2:1 with the ratio of the large chamber sectional area of emulsification fluid cylinder; Described selector valve is solenoid directional control valve or electro-hydraulic reversing valve; Described selector valve is two-position four way change valve or three position four-way directional control valve; Be respectively equipped with return filter, oil absorption filter on the oil return of described connection hydraulic oil container, the inlet line; Be respectively equipped with suction filter, graded filter on the suction of connection emulsion box, the water return pipeline.
Beneficial effect: the utility model adopts permanent power, the constant voltage control of modern hydraulic-pressure pump maturation to block control technique with pressure, utilize the variable mode for machinery surge control or electric proportional control permanent power control or constant voltage control or be the compound control of permanent power+constant voltage; Can adapt to well hydraulic prop and hydraulic support needs low pressure and mass flow, needs high-pressure low-flow when just support, need not the operating mode of fluid when being failure to actuate when setting prop, both can effectively reduce the mesh power of drive motor, has solved simultaneously the high problem that consumes energy; Adopt the profit transducer of different area ratio, can satisfy modern hydraulic prop equipment to the demand of ultrahigh pressure and super-flow, and profit transducer employing cylinder structure, very high volumetric efficiency and mechanical efficiency had; Adopt flow mode, the commutation even staggered control strategy on opportunity of duplex pump or treble pump+diverter valve, significantly reduced flow pulsation and the compression shock of emulsified liquid.It is simple in structure, volume is little, lightweight, good energy saving property, strong adaptability, volumetric efficiency is high, but discharge capacity stepless continuous control has widely practicability.
Description of drawings
Fig. 1 is system schematic of the present utility model.
Among the figure: the 1-hydraulic oil container; The 2-return filter; The 3-oil absorption filter; The 4-filter that absorbs water; The 5-graded filter; The 6-low pressure relief valve; The 7-low-pressure pump; The 8-safety valve; The right hydraulic-pressure pump of 9-; Join hydraulic-pressure pump among the 10-; 11-Left-wing Federation hydraulic-pressure pump; 12-I unloading overflow valve; 13-II unloading overflow valve; 14-I diverter valve; 15-II diverter valve; 16-I selector valve; 17-II selector valve; 18-III selector valve; 19-IV selector valve; 20-V selector valve; 21-I profit transducer; 22-II profit transducer; 23-III profit transducer; 24-IV profit transducer; 25-V profit transducer; The 26-water pressure gage; The 27-accumulator; The 28-emulsion box.
Embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is described further:
As shown in Figure 1, profit converted variable emulsion power pack of the present utility model, mainly by power plant, shunting and selector valve group, a plurality of profit transducers and auxiliary element consist of, described power plant comprise two anti-explosion motors, the variable hydraulic-pressure pump, low-pressure pump 7, two anti-explosion motors are connected with low-pressure pump 7 with the variable hydraulic-pressure pump respectively by coupling, described variable hydraulic-pressure pump can be selected the separate unit hydraulic-pressure pump according to whole pumping plant uninterrupted, the duplex hydraulic-pressure pump, or three hydraulic-pressure pumps, the variable hydraulic-pressure pump is parallel with unloading overflow valve and safety valve 8; The outlet port of low-pressure pump 7 also is connected with low pressure relief valve 6; The outlet port of variable hydraulic-pressure pump is serially connected with one-way valve; Described shunting and selector valve group are installed in variable hydraulic oil delivery side of pump, shunting comprises diverter valve and selector valve with the selector valve group, diverter valve is with the average or proportional profit transducer of distributing to of pressure oil of variable hydraulic-pressure pump output, the quantity of profit transducer is a plurality of, and the quantity of selector valve is identical with the quantity of profit transducer; The profit transducer comprise intermediate liquid compressing cylinder, symmetry be located at intermediate liquid compressing cylinder both sides about two emulsification fluid cylinders, about be arranged with two feed liquor one-way valves and two the fluid one-way valves that are connected with imbibition pipeline T and pressure piping P on the turnover pipeline of two emulsification fluid cylinders; The intermediate liquid compressing cylinder is two bar two-way ram cylinders, the two ends of its piston rod respectively with about the piston of two emulsification fluid cylinders be fixedly linked, two hydraulic fluid ports on the intermediate liquid compressing cylinder are connected with two actuator ports of selector valve respectively by the road; The return opening of selector valve is connected with hydraulic oil container 1 by return tube; The liquid return hole of emulsification fluid cylinder is connected with emulsion box 28 by liquid return pipe; The pressure piping P that links to each other with the emulsification fluid cylinder is provided with accumulator 27, pressure gauge 26.
Accompanying drawing 1 is depicted as three variable hydraulic-pressure pumps, and described three variable hydraulic-pressure pumps comprise interconnective right hydraulic-pressure pump 9, middle hydraulic-pressure pump 10 and Left-wing Federation's hydraulic-pressure pump 11; The outlet port of right hydraulic-pressure pump 9 also is connected with safety valve 8, middle hydraulic-pressure pump 10 outlet ports also are connected with I unloading overflow valve 12, the outlet port of Left-wing Federation's hydraulic-pressure pump 11 II unloading overflow valve 13 that respectively paralleled, the outlet port of described right hydraulic-pressure pump 9, middle hydraulic-pressure pump 10 and Left-wing Federation's hydraulic-pressure pump 11 is serially connected with respectively an one-way valve; The outlet port of described low-pressure pump 7 is parallel with low pressure relief valve 6;
Described shunting and selector valve group comprise I diverter valve 14, II diverter valve 15 and a plurality of selector valve, and wherein the filler opening of I diverter valve 14 and II diverter valve 15 is connected with the outlet of middle hydraulic-pressure pump 10 and Left-wing Federation's hydraulic-pressure pump 11 respectively; A plurality of selector valves are solenoid directional control valve or electro-hydraulic reversing valve, it comprises I selector valve 16, II selector valve 17, III selector valve 18, IV selector valve 19 and V selector valve 20, be two-position four way change valve, the return opening of each selector valve communicates with hydraulic oil container 1 by return tube; The filler opening of I selector valve 16 and II selector valve 17 is connected with the oil outlet of II diverter valve 15, the filler opening of III selector valve 18 and IV selector valve 19 is connected with the oil outlet of I diverter valve 14, and the filler opening of V selector valve 20 is connected with the oil outlet of right hydraulic-pressure pump 9;
Shown in the accompanying drawing, a plurality of profit transducers comprise I profit transducer 21, II profit transducer 22, III profit transducer 23, IV profit transducer 24 and V profit transducer 25, the structural type of each profit transducer is identical, by the intermediate liquid compressing cylinder, about two emulsification fluid cylinders and comprise that the rectifying valve group of four one-way valves consists of; Each profit transducer comprise intermediate liquid compressing cylinder, symmetry be located at intermediate liquid compressing cylinder both sides about two emulsification fluid cylinders, about be arranged be connected with imbibition pipeline T and pressure piping P two feed liquor one-way valves and two fluid one-way valves on the turnover pipeline of two emulsification fluid cylinders; The intermediate liquid compressing cylinder of each profit transducer is two bar two-way ram cylinders, and the two ends of its piston rod are fixedly linked with the piston of two emulsification fluid cylinders respectively; Two hydraulic fluid ports on the intermediate liquid compressing cylinder of each profit transducer respectively two actuator ports of the selector valve corresponding with it are connected, be that two hydraulic fluid ports are connected with two actuator ports of I selector valve 16 on the I profit transducer 21, two hydraulic fluid ports are connected with two actuator ports of II selector valve 17 on the II profit transducer 22, two hydraulic fluid ports are connected with two actuator ports of III selector valve 18 on the III profit transducer 23, two hydraulic fluid ports are connected with two actuator ports of IV selector valve 19 on the IV profit transducer 24, and two hydraulic fluid ports are connected with two actuator ports of V selector valve 20 on the V profit transducer 25; Rectifying valve group on each profit transducer forms by four one-way valves, and wherein two are the imbibition one-way valve, and two is the fluid one-way valve in addition; The large chamber of two emulsification fluid cylinders of each profit transducer all is connected by the outlet of imbibition one-way valve with low-pressure pump 7, is connected with pressure piping by two fluid one-way valves; The rod end chamber of two emulsification fluid cylinders of each profit transducer is connected with atmosphere by the aperture on its inner end fastening flange; The net sectional area of the intermediate liquid compressing cylinder of I profit transducer 21 and II profit transducer 22 is 1:2 with the ratio of its large chamber of emulsification fluid cylinder, left and right sides sectional area; The net sectional area of the intermediate liquid compressing cylinder of III profit transducer 23 and IV profit transducer 24 is 1:1 with the ratio of its large chamber of emulsification fluid cylinder, left and right sides sectional area; The net sectional area of the intermediate liquid compressing cylinder of V profit transducer 25 is 2:1 with the ratio of its large chamber of emulsification fluid cylinder, left and right sides sectional area.
Described auxiliary element comprises hydraulic oil container 1, emulsion box 28, return filter 2, oil absorption filter 3, suction filter 4, graded filter 5, accumulator 27, pressure gauge 26, and return filter 2, oil absorption filter 3 are located at respectively on the oil return that is communicated with hydraulic oil container 1, the inlet line; Suction filter 4, graded filter 5 are located at respectively on the suction that is communicated with emulsion box 28, the water return pipeline.The return opening of selector valve is connected with hydraulic oil container 1 by return tube; Accumulator 27, pressure gauge 26 are located on the pressure piping P that links to each other with the emulsification fluid cylinder.
Working principle and working procedure:
When I selector valve 16, II selector valve 17, III selector valve 18, IV selector valve 19 and V selector valve 20 are when left position, the hydraulic oil of right hydraulic-pressure pump 9 outputs in three hydraulic-pressure pumps directly enters the left side oil pocket of the intermediate liquid compressing cylinder of V profit transducer 25, after dividing equally by I diverter valve 14 and II diverter valve 15 respectively, the hydraulic oil of middle hydraulic-pressure pump 10 and 11 outputs of Left-wing Federation's hydraulic-pressure pump enters I profit transducer 21, II profit transducer 22, the left side oil pocket of the intermediate liquid compressing cylinder of III profit transducer 23 and IV profit transducer 24, the piston of each profit transducer is moved right, its left emulsification fluid cylinder is by in the emulsified liquid suction cylinder of imbibition one-way valve with low-pressure pump 7 output, and the emulsified liquid in the right emulsification fluid cylinder is pressed into pressure piping through the fluid one-way valve.Equally, when I selector valve 16, II selector valve 17, III selector valve 18, IV selector valve 19 and V selector valve 20 in right when position, hydraulic oil enters the right side oil pocket of the intermediate liquid compressing cylinder of each profit transducer, each profit transducer piston is moved to the left, its right emulsification fluid cylinder is by in the emulsified liquid suction cylinder of imbibition one-way valve with low-pressure pump 7 output, and the emulsified liquid in the left emulsification fluid cylinder is pressed into pressure piping through the fluid one-way valve.
When the required emulsified liquid working pressure of system is relatively lower, right hydraulic-pressure pump 9, middle hydraulic-pressure pump 10 and Left-wing Federation's hydraulic-pressure pump 11 are all with maximum pump discharge output hydraulic pressure oil, thereby each profit transducer is at full throttle moved, and I profit transducer 21 and II profit transducer 22 have the flow increasing function, make the flow maximum of the emulsified liquid of output, the demand of super-flow when satisfying system low-voltage.Along with the increase of the required emulsified liquid working pressure of system, the permanent control function of power of middle hydraulic-pressure pump 10 and Left-wing Federation's hydraulic-pressure pump 11 can guarantee that system moves and reaches good energy-saving effect under permanent power rating.
When working surface does not need emulsified liquid, I unloading overflow valve 12 and II unloading overflow valve 13 make respectively middle hydraulic-pressure pump 10 and 11 unloadings of Left-wing Federation's hydraulic-pressure pump, the right oil hydraulic pump 9 that has simultaneously constant-pressure variable control function realizes that pressure blocks, but only export the emulsified liquid of the very little required pressure of keeping system, effectively avoid energy loss.
When system needed ultrahigh pressure, I unloading overflow valve 12 and II unloading overflow valve 13 made respectively middle hydraulic-pressure pump 10 and 11 unloadings of Left-wing Federation's hydraulic-pressure pump; At this moment the hydraulic oil of right oil hydraulic pump 9 outputs enters V profit transducer 25, and by its pressurization, the emulsified liquid of exportable ultrahigh pressure.

Claims (5)

1. a profit converted variable emulsion power pack is characterized in that: comprise power plant, shunting and selector valve group, profit transducer; Described power plant comprise two anti-explosion motors, variable hydraulic-pressure pump, low-pressure pump (7), two anti-explosion motors are connected with low-pressure pump with the variable hydraulic-pressure pump respectively by coupling, described variable hydraulic-pressure pump is separate unit hydraulic-pressure pump, duplex hydraulic-pressure pump or three hydraulic-pressure pumps, and the variable hydraulic-pressure pump is parallel with unloading overflow valve and safety valve (8); The outlet port of low-pressure pump (7) also is connected with low pressure relief valve (6); The outlet port of variable hydraulic-pressure pump is serially connected with one-way valve; Described shunting and selector valve group are installed in variable hydraulic oil delivery side of pump, shunting comprises diverter valve and selector valve with the selector valve group, diverter valve is with the average or proportional profit transducer of distributing to of pressure oil of variable hydraulic-pressure pump output, the quantity of profit transducer is a plurality of, and the quantity of selector valve is identical with the quantity of profit transducer; The profit transducer comprise intermediate liquid compressing cylinder, symmetry be located at intermediate liquid compressing cylinder both sides about two emulsification fluid cylinders, about be arranged with two feed liquor one-way valves and two the fluid one-way valves that are connected with imbibition pipeline T and pressure piping P on the turnover pipeline of two emulsification fluid cylinders; The intermediate liquid compressing cylinder is two bar two-way ram cylinders, the two ends of its piston rod respectively with about the piston of two emulsification fluid cylinders be fixedly linked, two hydraulic fluid ports on the intermediate liquid compressing cylinder are connected with two actuator ports of selector valve respectively by the road; The return opening of selector valve is connected with hydraulic oil container (1) by return tube; The liquid return hole of emulsification fluid cylinder is connected with emulsion box (28) by liquid return pipe; The pressure piping P that links to each other with the emulsification fluid cylinder is provided with accumulator (27), pressure gauge (26).
2. profit converted variable emulsion power pack according to claim 1, it is characterized in that: the net sectional area of the intermediate liquid compressing cylinder of described profit transducer is 1:2 ~ 2:1 with the ratio of the large chamber sectional area of emulsification fluid cylinder.
3. profit converted variable emulsion power pack according to claim 1, it is characterized in that: described selector valve is solenoid directional control valve or electro-hydraulic reversing valve.
4. according to claim 1 or 3 described profit converted variable emulsion power packs, it is characterized in that: described selector valve is two-position four way change valve or three position four-way directional control valve.
5. profit converted variable emulsion power pack according to claim 1 is characterized in that: be respectively equipped with return filter (2), oil absorption filter (3) on the oil return of described connection hydraulic oil container (1), the inlet line; Be respectively equipped with suction filter (4), graded filter (5) on the suction of connection emulsion box (28), the water return pipeline.
CN 201220344342 2012-07-17 2012-07-17 Oil-water conversion variable emulsion pump station Expired - Fee Related CN202732552U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220344342 CN202732552U (en) 2012-07-17 2012-07-17 Oil-water conversion variable emulsion pump station

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Application Number Priority Date Filing Date Title
CN 201220344342 CN202732552U (en) 2012-07-17 2012-07-17 Oil-water conversion variable emulsion pump station

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CN202732552U true CN202732552U (en) 2013-02-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777446A (en) * 2012-07-17 2012-11-14 徐州铭硕机械科技有限公司 Oil-water conversion variable displacement emulsion pump station
CN103982477A (en) * 2014-05-10 2014-08-13 长治市永华机械有限公司 System taking emulsion power as prime power of underground equipment
CN104154060A (en) * 2014-08-08 2014-11-19 山西潞安环保能源开发股份有限公司常村煤矿 Hydraulic medium conversion device of downhole sling cart

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777446A (en) * 2012-07-17 2012-11-14 徐州铭硕机械科技有限公司 Oil-water conversion variable displacement emulsion pump station
CN102777446B (en) * 2012-07-17 2015-09-23 徐州铭硕机械科技有限公司 A kind of oil-water conversion variable displacement emulsion pump station
CN103982477A (en) * 2014-05-10 2014-08-13 长治市永华机械有限公司 System taking emulsion power as prime power of underground equipment
CN104154060A (en) * 2014-08-08 2014-11-19 山西潞安环保能源开发股份有限公司常村煤矿 Hydraulic medium conversion device of downhole sling cart

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Granted publication date: 20130213

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