CN106523335A - Automatic reversing water pump - Google Patents
Automatic reversing water pump Download PDFInfo
- Publication number
- CN106523335A CN106523335A CN201610719374.8A CN201610719374A CN106523335A CN 106523335 A CN106523335 A CN 106523335A CN 201610719374 A CN201610719374 A CN 201610719374A CN 106523335 A CN106523335 A CN 106523335A
- Authority
- CN
- China
- Prior art keywords
- mouths
- water pump
- water
- control valve
- directional control
- 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.)
- Pending
Links
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
- 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
Abstract
The invention discloses an automatic reversing water pump. The automatic reversing water pump comprises a water pump body and a hydraulic drive system, wherein the hydraulic drive system communicates with the water pump body, and a signal valve is arranged between the hydraulic drive system and the water pump body. According to the automatic reversing water pump disclosed by the invention, a speed reduction device and unnecessary drive mechanisms and signal feedback mechanisms are not arranged, and thus a light weight is achieved; an output flow can be completely adjusted as needed; a power direction is the same as an action direction of the water pump, and thus low power consumption and high efficiency are achieved; the piston-type water pump is high in anti-pollution capacity and capable of easily adapting to poor water quality; straight reciprocating motion is adopted, a piston of the water pump is free from an eccentric load, and the service life is prolonged; and acquisition manners for a hydraulic signal are various at the tail end of a stroke of an oil cylinder, and are simple to realize.
Description
Technical field
The present invention relates to a kind of water pump, more particularly to a kind of automatic reverse water pump.
Technical background
A kind of technology of current traditional water pump realizes that route is：Using crank block or piston mechanism principle, by crank
Spinning movement be converted into the linear reciprocating motion of slide block or piston, in order to meet appropriate traffic requirement, and adapt to piston
Movement velocity requires, generally requires to increase deceleration device between power and crank.Existing deceleration device generally slows down
Case, weight are larger.Another plunger water pump be by the reciprocating motion that crank convert rotational motion is three plungers, the type
Pump plunger allows reciprocating speed faster, but resistant to pollution ability is poor, is not suitable with the water quality containing impurity, particle.Will
Convert rotational motion is the linkage of linear motion, loads and receives the change of mechanism position more obvious, causes the output of power
It is unstable, and then cause the increase of oil consumption.
If water piston directly, by the way of straight reciprocating motion, will simplify the drive mechanism of water pump, power output
To become steady.As the driving direction of power is consistent with piston movement direction, piston will not be subject to unbalance loading, therefore can also drop
Low dynamics are lost, and the life-span of water piston can also increase.Therefore, water pump needs the technical problem for solving how to move in circles.
The straight reciprocating motion of water piston typically can realize by oil cylinder technological difficulties are how to make piston in stroke
End is commutated, and then can continue linear motion.It is a kind of that feedback is carried out by the position signalling of end of travel
Solution, position signalling can be realized by modes such as external travel switch or proximity switches, but external stroke
Switch or proximity switch need to carry out electrical system process, and water pump system is complicated, and the water pump of much field works
Driving power supply, but need to realize that signal is changed by electrical system using external travel switch or proximity switch, thus
So that water pump system becomes complicated, and many water pumps are used for field work, it is impossible to provide the driving power supply of electrical system.
The content of the invention
The technical problem to be solved is the drawbacks described above for overcoming prior art to exist, there is provided a kind of to move certainly
To water pump.
The technical solution adopted for the present invention to solve the technical problems is that a kind of automatic reverse water pump, including water pump body
And fluid power system, the fluid power system connection water pump body, set between the fluid power system and water pump body
There is signal valve.
Further, the fluid power system includes pilot operated directional control valve one and pilot operated directional control valve two, one He of pilot operated directional control valve
Actuator port is equipped with pilot operated directional control valve two, drive hydraulic fluid port, oil-in and oil return opening.
Further, the actuator port of the pilot operated directional control valve one includes A1 mouths and B1 mouths, the work of the pilot operated directional control valve two
Include A2 mouths and B2 mouths as hydraulic fluid port, the driving hydraulic fluid port of the pilot operated directional control valve one includes k1 mouths and k2 mouths, the pilot operated directional control valve
Two driving hydraulic fluid port includes k3 mouths and k4 mouths, and the oil-in of the pilot operated directional control valve one is P1 mouths, the pilot operated directional control valve two
Oil-in is P2 mouths, and the oil return opening of the pilot operated directional control valve one is T1 mouths, and the oil return opening of the pilot operated directional control valve two is T2 mouths；
The P2 mouths connect B2 mouths, and the B2 mouths connect k2 mouths, and the k1 mouths are respectively communicated with A2 mouths, and the A2 mouths connect T2
Mouthful, the T2 mouths connect total oil return opening, total oil-in connection P1 mouths and P2 mouths, the A1 mouths, B1 mouths, k4 mouths and k3 with T1
Mouth connection water pump body.
Further, the water pump body includes oil cylinder and water vat, is provided with oil cylinder piston, sets in the water vat in the oil cylinder
There is water vat piston, the oil cylinder piston is connected by piston rod with water vat piston, and the two ends of the water vat are respectively communicated with water sucking mouth
And delivery port, water suction check valve is provided between the water vat and water sucking mouth, is provided with water outlet unidirectional between the water vat and delivery port
Valve.
Further, the oil cylinder is provided with actuator port and signal hydraulic fluid port, the actuator port of the oil cylinder include A3 mouths and
B3 mouths, the signal hydraulic fluid port of the oil cylinder include C1 mouths and C2 mouths；
The A3 mouths, B3 mouths, C1 mouths connect fluid power system with C2 mouths.
Further, the A1 mouths connect A3 mouths, and the C2 mouths connect k4 mouths, and the B1 mouths connect B3 mouths, and the C1 mouths connect
Logical k3 mouths.
Further, the quantity of the water vat is two, and two water vats are respectively provided at the left side and right side of oil cylinder.
Further, the quantity of the water vat is one, and water vat is located at the left side or right side of oil cylinder.
Further, the signal valve is located at the two ends of oil cylinder.
Compared with prior art, the invention has the advantages that：Without deceleration device, there is no unnecessary drive mechanism
With signal feedback mechanism, it is lightweight；Output flow can be adjusted completely on demand；Power direction and water pump direction of action one
Cause, small power consumption, efficiency high；Piston pump contamination resistance is strong, when water quality is poor, also easily can adapt to；Using linear reciprocation
Motion, water piston increased without unbalance loading, life-span；In the end of travel of oil cylinder, the acquisition modes variation of hydraulic pressure signal, realize
Come simple.
Description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1
Accompanying drawing 1 is refer to, the present embodiment includes water pump body 1 and fluid power system 2, and the fluid power system 2 connects
Logical water pump body 1, is provided with signal valve 3 between the fluid power system 2 and water pump body 1.
In the present embodiment, the fluid power system 2 includes two 2-2 of one 2-1 of pilot operated directional control valve and pilot operated directional control valve, hydraulic control
Actuator port is equipped with two 2-2 of one 2-1 of reversal valve and pilot operated directional control valve, drive hydraulic fluid port, oil-in and oil return opening, the hydraulic control
The actuator port of one 2-1 of reversal valve includes A1 mouths and B1 mouths, and the actuator port of two 2-2 of the pilot operated directional control valve includes A2 mouths and B2
Mouthful, the driving hydraulic fluid port of one 2-1 of the pilot operated directional control valve includes k1 mouths and k2 mouths, the driving hydraulic fluid port of two 2-2 of the pilot operated directional control valve
Including k3 mouths and k4 mouths, the oil-in of one 2-1 of the pilot operated directional control valve is P1 mouths, the oil-in of two 2-2 of the pilot operated directional control valve
For P2 mouths, the oil return opening of one 2-1 of the pilot operated directional control valve is T1 mouths, and the oil return opening of two 2-2 of the pilot operated directional control valve is T2 mouths；
The P2 mouths connect B2 mouths, and the B2 mouths connect k2 mouths, and the k1 mouths are respectively communicated with A2 mouths, and the A2 mouths connect T2
Mouthful, the T2 mouths connects total oil return opening 7 with T1, and total oil-in 6 connects P1 mouths and P2 mouths, the A1 mouths, B1 mouths, k4 mouths and
K3 mouths connect water pump body 1.
In the present embodiment, the water pump body 1 includes that oil cylinder 1-1 and water vat 1-2, the oil cylinder 1-1 connect water vat 1-2,
Oil cylinder piston 1-3 is provided with the oil cylinder 1-1, is provided with water vat piston 1-4, the oil cylinder piston 1-3 and water in the water vat 1-2
Cylinder piston 1-4 is connected by piston rod 1-5, and the two ends of the water vat 1-2 are respectively communicated with water sucking mouth 4 and delivery port 5, the water vat
Water suction check valve 4-1 is provided between 1-2 and water sucking mouth 4, is provided with out water one-way valve 5-1 between the water vat 1-2 and delivery port 5,
The oil cylinder 1-1 is provided with actuator port and signal hydraulic fluid port, and the actuator port of the oil cylinder 1-1 includes A3 mouths and B3 mouths, described
The signal hydraulic fluid port of oil cylinder 1-1 includes C1 mouths and C2 mouths；
The A3 mouths, B3 mouths, C1 mouths connect fluid power system 2 with C2 mouths.
In the present embodiment, the A1 mouths connect A3 mouths, and the C2 mouths connect k4 mouths, and the B1 mouths connect B3 mouths, the C1
Mouth connection k3 mouths.
In the present embodiment, the quantity of the water vat 1-2 is two, and two water vat 1-2 are respectively provided at the left side and the right side of oil cylinder 1-1
Side, the signal valve 3 are located at the two ends of oil cylinder 1-1.
The course of work：Pressure oil enters fluid power system 2 from total oil-in 6, and by two independent oil circuit difference
The P2 mouths of two 2-2 of P1 mouths and pilot operated directional control valve of one 2-1 of pilot operated directional control valve are entered into, now, one 2-1 of pilot operated directional control valve is in the right side
Position, two 2-2 of pilot operated directional control valve are in left position；The pressure oil of P2 mouths flows to liquid controlled reversing by the B2 mouths of two 2-2 of pilot operated directional control valve
The k2 mouths of one 2-1 of valve, and k1 mouths flow to T2 mouths by the A2 mouths of two 2-2 of pilot operated directional control valve, and then by 7 oil return of total oil return opening,
The pressure oil of k1 mouths and k2 mouths makes one 2-1 of pilot operated directional control valve be maintained at right position.
Meanwhile, the pressure oil of P1 mouths flows to the A3 mouths of oil cylinder 1-1 by the A1 mouths of one 2-1 of pilot operated directional control valve, drives oil cylinder
Piston 1-3 is moved right, and promotes water vat piston 1-4 to move right by piston rod 1-5, pulls water vat by piston rod 1-5
Piston 1-4 is moved right；When water vat piston 1-4 is moved right in the water vat 1-2 in left side, check valve 4-1 is from water suction for water suction
In the water vat 1-2 in 4 water suction water inlet left side of mouth；When water vat piston 1-4 is moved right in the water vat 1-2 on right side, the water on right side
Water in cylinder 1-2 is depressed into delivery port 5 by going out water one-way valve 5-1.
When oil cylinder 1-1 moves to end of travel, signal valve 3 produces hydraulic pressure signal, and acts on liquid by fluid pressure line
The k4 mouths of control two 2-2 of reversal valve, drive two 2-2 of pilot operated directional control valve commutations, make two 2-2 of pilot operated directional control valve be in right position；
Now, internal galleries of the pressure oil of P2 mouths by two 2-2 of pilot operated directional control valve, flow to two 2-2's of pilot operated directional control valve
A2 mouths, and the k1 mouths of one 2-1 of pilot operated directional control valve are acted on by fluid pressure line, one 2-1 of pilot operated directional control valve commutations are driven, hydraulic control is made
One 2-1 of reversal valve is in left position；
Now, internal galleries of the pressure oil of P1 mouths by one 2-1 of pilot operated directional control valve, flow to one 2-1's of pilot operated directional control valve
B1 mouths, and the B3 mouths of hydraulic jack 1-1 are acted on by fluid pressure line, drive oil cylinder 1-1 to left movement, realize oil cylinder 1-1
Commutation action；
When the piston movement of oil cylinder 1-1 is to left side end of travel, equally can realize that commutation is dynamic by fluid power system 2
Make, and then realize straight reciprocating motion, cooperation water vat 1-2 and water suction check valve 4-1 is relapsed, arranged with the past of water one-way valve 5-1 is gone out
Water, that is, realize the principle of water pump.
Signal valve 3 in the present embodiment produces the mode of signal and does not limit, and such as has following manner：
1st, the signal that builds the pressure produced in end of travel by oil cylinder piston 1-3；
2nd, by oil cylinder piston 1-3 in end of travel, the pressure difference signal of piston former and later two location points.
It is lightweight；Output flow can be adjusted on demand；Power direction is consistent with water pump direction of action, consumes little, efficiency
It is high；Contamination resistance is strong, and water piston increased without unbalance loading, life-span；In the end of travel of oil cylinder 1-1, the acquisition side of hydraulic pressure signal
Formula variation, implements simple.
Embodiment 2
Accompanying drawing 2 is refer to, the present embodiment is differed only in embodiment 1, the quantity of the water vat 1-2 is one, water
Cylinder 1-2 is located at the right side of oil cylinder 1-1.Yu Ze is substantially the same manner as Example 1.
It is lightweight；Output flow can be adjusted on demand；Power direction is consistent with water pump direction of action, consumes little, efficiency
It is high；Contamination resistance is strong, and water piston increased without unbalance loading, life-span；In the end of travel of oil cylinder 1-1, the acquisition side of hydraulic pressure signal
Formula variation, implements simple.
Embodiment 3
The present embodiment is differed only in embodiment 1, and the quantity of the water vat 1-2 is one, and water vat 1-2 is located at oil cylinder
The left side of 1-1.Yu Ze is substantially the same manner as Example 1.
It is lightweight；Output flow can be adjusted on demand；Power direction is consistent with water pump direction of action, consumes little, efficiency
It is high；Contamination resistance is strong, and water piston increased without unbalance loading, life-span；In the end of travel of oil cylinder 1-1, the acquisition side of hydraulic pressure signal
Formula variation, implements simple.
Claims (9)
1. a kind of automatic reverse water pump, it is characterised in that including water pump body and fluid power system, the fluid power system
Connection water pump body, is provided with signal valve between the fluid power system and water pump body.
2. automatic reverse water pump according to claim 1, it is characterised in that the fluid power system includes liquid controlled reversing
Actuator port is equipped with valve one and pilot operated directional control valve two, pilot operated directional control valve one and pilot operated directional control valve two, drive hydraulic fluid port, oil-in
And oil return opening.
3. automatic reverse water pump according to claim 2, it is characterised in that the actuator port bag of the pilot operated directional control valve one
A1 mouths and B1 mouths is included, the actuator port of the pilot operated directional control valve two includes A2 mouths and B2 mouths, the driving of the pilot operated directional control valve one
Hydraulic fluid port includes k1 mouths and k2 mouths, and the driving hydraulic fluid port of the pilot operated directional control valve two includes k3 mouths and k4 mouths, the pilot operated directional control valve one
Oil-in be P1 mouths, the oil-in of the pilot operated directional control valve two is P2 mouths, and the oil return opening of the pilot operated directional control valve one is T1 mouths,
The oil return opening of the pilot operated directional control valve two is T2 mouths；
The P2 mouths connect B2 mouths, and the B2 mouths connect k2 mouths, and the k1 mouths are respectively communicated with A2 mouths, and the A2 mouths connect T2 mouths,
The T2 mouths connect total oil return opening, total oil-in connection P1 mouths and P2 mouths, the A1 mouths, B1 mouths, k4 mouths and k3 mouths with T1
Connection water pump body.
4. the automatic reverse water pump according to any one of claim 1-3, it is characterised in that the water pump body includes oil cylinder
And water vat, oil cylinder piston is provided with the oil cylinder, is provided with water vat piston in the water vat, the oil cylinder piston and water vat piston are logical
Cross piston rod to be connected, the two ends of the water vat are respectively communicated with water sucking mouth and delivery port, are provided with suction between the water vat and water sucking mouth
Water one-way valve, is provided with out water one-way valve between the water vat and delivery port.
5. automatic reverse water pump according to claim 4, it is characterised in that the oil cylinder is provided with actuator port and signal
Hydraulic fluid port, the actuator port of the oil cylinder include A3 mouths and B3 mouths, and the signal hydraulic fluid port of the oil cylinder includes C1 mouths and C2 mouths；
The A3 mouths, B3 mouths, C1 mouths connect fluid power system with C2 mouths.
6. automatic reverse water pump according to claim 5, it is characterised in that the A1 mouths connect A3 mouths, the C2 mouths connect
Logical k4 mouths, the B1 mouths connect B3 mouths, and the C1 mouths connect k3 mouths.
7. automatic reverse water pump according to claim 6, it is characterised in that the quantity of the water vat is two, two water vats
It is respectively provided at the left side and right side of oil cylinder.
8. automatic reverse water pump according to claim 7, it is characterised in that the quantity of the water vat is, and water vat sets
In the left side or right side of oil cylinder.
9. automatic reverse water pump according to claim 8, it is characterised in that the signal valve is located at the two ends of oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610719374.8A CN106523335A (en) | 2016-08-25 | 2016-08-25 | Automatic reversing water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610719374.8A CN106523335A (en) | 2016-08-25 | 2016-08-25 | Automatic reversing water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106523335A true CN106523335A (en) | 2017-03-22 |
Family
ID=58343577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610719374.8A Pending CN106523335A (en) | 2016-08-25 | 2016-08-25 | Automatic reversing water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523335A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425665A (en) * | 2018-05-18 | 2018-08-21 | 东莞海特帕沃液压科技有限公司 | A kind of fracturing pump of hydraulic-driven |
| CN108571479A (en) * | 2018-05-18 | 2018-09-25 | 东莞海特帕沃液压科技有限公司 | A kind of single-ram booster |
| CN108612709A (en) * | 2018-05-18 | 2018-10-02 | 东莞海特帕沃液压科技有限公司 | A kind of reciprocating air compressor of hydraulic-driven |
| CN108612682A (en) * | 2018-05-18 | 2018-10-02 | 东莞海特帕沃液压科技有限公司 | A kind of low noise hydraulic intensifier |
| CN108644092A (en) * | 2018-05-18 | 2018-10-12 | 东莞海特帕沃液压科技有限公司 | A kind of reciprocating air compressor of hydraulic-driven |
| CN108679031A (en) * | 2018-05-18 | 2018-10-19 | 东莞海特帕沃液压科技有限公司 | A kind of hydraulic air compressor |
| CN108679006A (en) * | 2018-05-18 | 2018-10-19 | 东莞海特帕沃液压科技有限公司 | A kind of single-action reciprocating hydraulic intensifier |
| CN108691737A (en) * | 2018-05-18 | 2018-10-23 | 东莞海特帕沃液压科技有限公司 | A kind of piston high-density pump of hydraulic-driven |
| CN108730148A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of double plunger fracturing pump of hydraulic-driven |
| CN108730146A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of fracturing pump of hydraulic-driven |
| CN108730151A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of high-pressure injection pump of hydraulic-driven |
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| CN2559811Y (en) * | 2002-08-12 | 2003-07-09 | 大庆石油管理局 | Hydraulic driving stepless speed regulating double-effect booster pump |
| CN103029174A (en) * | 2012-12-30 | 2013-04-10 | 淮阴工学院 | Control system for coal mine underground water-jet cutting machine |
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| US3700360A (en) * | 1971-08-23 | 1972-10-24 | Myers Sherman Co | Double-acting tandem piston pump |
| CN86101588A (en) * | 1986-03-09 | 1987-02-11 | 付连起 | Multipurpose fluid drive piston pump |
| CN1069105A (en) * | 1992-07-31 | 1993-02-17 | 天津理工学院 | Sungle-cylinder, double-action type hydraulic slurry pump |
| CN2559811Y (en) * | 2002-08-12 | 2003-07-09 | 大庆石油管理局 | Hydraulic driving stepless speed regulating double-effect booster pump |
| CN103029174A (en) * | 2012-12-30 | 2013-04-10 | 淮阴工学院 | Control system for coal mine underground water-jet cutting machine |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425665A (en) * | 2018-05-18 | 2018-08-21 | 东莞海特帕沃液压科技有限公司 | A kind of fracturing pump of hydraulic-driven |
| CN108571479A (en) * | 2018-05-18 | 2018-09-25 | 东莞海特帕沃液压科技有限公司 | A kind of single-ram booster |
| CN108612709A (en) * | 2018-05-18 | 2018-10-02 | 东莞海特帕沃液压科技有限公司 | A kind of reciprocating air compressor of hydraulic-driven |
| CN108612682A (en) * | 2018-05-18 | 2018-10-02 | 东莞海特帕沃液压科技有限公司 | A kind of low noise hydraulic intensifier |
| CN108644092A (en) * | 2018-05-18 | 2018-10-12 | 东莞海特帕沃液压科技有限公司 | A kind of reciprocating air compressor of hydraulic-driven |
| CN108679031A (en) * | 2018-05-18 | 2018-10-19 | 东莞海特帕沃液压科技有限公司 | A kind of hydraulic air compressor |
| CN108679006A (en) * | 2018-05-18 | 2018-10-19 | 东莞海特帕沃液压科技有限公司 | A kind of single-action reciprocating hydraulic intensifier |
| CN108691737A (en) * | 2018-05-18 | 2018-10-23 | 东莞海特帕沃液压科技有限公司 | A kind of piston high-density pump of hydraulic-driven |
| CN108730148A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of double plunger fracturing pump of hydraulic-driven |
| CN108730146A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of fracturing pump of hydraulic-driven |
| CN108730151A (en) * | 2018-05-18 | 2018-11-02 | 东莞海特帕沃液压科技有限公司 | A kind of high-pressure injection pump of hydraulic-driven |
| CN108730148B (en) * | 2018-05-18 | 2019-07-26 | 胜利油田东强机电设备制造有限公司 | A kind of double plunger fracturing pump of hydraulic-driven |
| CN108612682B (en) * | 2018-05-18 | 2019-08-27 | 建湖县八达液压机械有限公司 | A kind of low noise hydraulic intensifier |
| CN108691737B (en) * | 2018-05-18 | 2019-11-22 | 江苏佳佩环保机械设备有限公司 | A kind of piston high-density pump of hydraulic-driven |
| CN108571479B (en) * | 2018-05-18 | 2020-02-18 | 上海大众液压系统有限公司 | Single-plunger supercharger |
| CN108730151B (en) * | 2018-05-18 | 2020-06-19 | 诺希德实业（深圳）有限公司 | Hydraulically-driven high-pressure grouting pump |
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Application publication date: 20170322 |