CN108730148B - A kind of double plunger fracturing pump of hydraulic-driven - Google Patents
A kind of double plunger fracturing pump of hydraulic-driven Download PDFInfo
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- CN108730148B CN108730148B CN201810480276.2A CN201810480276A CN108730148B CN 108730148 B CN108730148 B CN 108730148B CN 201810480276 A CN201810480276 A CN 201810480276A CN 108730148 B CN108730148 B CN 108730148B
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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
- F04B9/111—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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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
- F04B49/22—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 by means of valves
Abstract
The invention discloses a kind of double plunger fracturing pumps of hydraulic-driven, it is provided with oil inlet P, oil return inlet T, inlet V and high-pressure oil outlet H, including pressurized cylinder and pilot-operated type pilot operated directional control valve, pressurized cylinder includes low pressure (LP) cylinder, low-pressure piston, left high-pressure plunger, right high-pressure plunger, left high pressure cylinder and right high pressure cylinder, low pressure (LP) cylinder is equipped with the first oil inlet runner, the second oil inlet runner, the first control runner and the second control runner, and the connectivity slot of annular is provided on low-pressure piston；When low-pressure piston moves left to it and the first through-flow slot is completely covered by position, connectivity slot commutates the first oil inlet runner and the first control runner connection control pilot-operated type pilot operated directional control valve, and low-pressure piston is braked by closed left piston chamber；When low-pressure piston is shifted to the right to it and the second through-flow slot is completely covered by position, connectivity slot commutates the second oil inlet runner and the second control runner connection control pilot-operated type pilot operated directional control valve, and low-pressure piston is braked by closed right piston chamber；The fracturing pump is not only simple in structure, and is not necessarily to automatically controlled control, and noise is very low.
Description
Technical field
The present invention relates to oil gas fracturing technique field, in particular to the double plunger fracturing pump of a kind of hydraulic-driven.
Background technique
Pressing crack construction operation is transformation one of the important means of oil-gas reservoir, for low permeability oil and gas well, generally require by
Fracturing work can be only achieved the purpose of stable yields and volume increase.Fracturing pump is the working host of fracturing unit truck, is to realize that fracturing technology is intended to
Equipment is most directly executed, is mainly made of the components such as power end assembly and fluid end assembly.
In the prior art, crank type plunger pump is generally used as the fracturing pump of conveying mechanism, Fig. 4 is this crank type column
The structural schematic diagram for filling in pump, as shown in figure 4, crank type plunger pump 1' includes crankshaft 11', multiple connecting rod 12' and multiple plungers
13' etc., the both ends of crankshaft 11' are provided with power input gear, and multiple plunger 13' are arranged in the side of crankshaft 11', multiple plungers
One end of 13' can move back and forth in fluid end (show in figure but do not mark) respectively, and multiple connecting rod 12' are arranged in multiple plungers
Between the other end and crankshaft 11' of 13', in this way when crankshaft 11' is rotated, connecting rod 12' will be driven to make crank rod movement, connecting rod
12' drives plunger 13' reciprocating (similar to the movement of engine crankshaft and piston) in turn, passes through fluid end to realize
By working media (fracturing fluid) sucking and continuous High voltage output, to carry out fracturing work.
In above-mentioned crank type plunger pump, stroke is shorter (such as five cylinder formula plunger pumps stroke are about 200mm), commutates often,
Plunger action is frequent, and the service life of vulnerable part is short, for example, the service life of the valve seat of fluid end, valve and valve rubber etc. only has tens
Hour；In addition, the output pressure of this crank type plunger pump, the coverage area of flow are relatively narrow, to improve coverage area, need more
Change the fluid end of different cylinder diameters；In addition, plunger, in frequently quickly commutation, not yet sufficiently sucking is discharged fracturing fluid, cause to inhale
Enter inefficient, causes working efficiency relatively low；In addition, integrated installation has crankshaft, power input gear, connecting rod, liquid in fracturing pump
The cabinet and pedestal at power end etc., structure is complicated, and manufacturing cost is high, and dismounting maintenance is inconvenient；In addition, power input gear makees high speed weight
Carry rotation, it is high to lubrication and cooling requirement, need arragement construction complexity lubricating system and corresponding cooling system.
Therefore, how to be improved for existing above-mentioned insufficient and defect, more to adapt to oil and gas development needs, be
Those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
(1) technical problems to be solved
It is an object of the invention to overcome the defect in the prior art, one kind is provided and effectively increases stroke, reduce jig frequency, is mentioned
The service life of high vulnerable part, the effectively coverage area of increase output pressure, flow, effectively improve suction efficiency, are effectively reduced
Structural complexity, save the cost, and the requirement of lubrication and cooling is effectively reduced, it may not need automatically controlled control, pair of low noise
Plunger automatic reciprocating type fracturing pump.
(2) technical solution
To achieve the above object, the present invention provides a kind of double plunger fracturing pump of hydraulic-driven, be provided with oil inlet P,
Oil return inlet T, inlet V and high pressure liquid outlet H, which is characterized in that including pressurized cylinder and pilot-operated type pilot operated directional control valve；
The pressurized cylinder includes low pressure (LP) cylinder, low-pressure piston, left high-pressure plunger, right high-pressure plunger, left high pressure cylinder and right high pressure
Cylinder, the low-pressure piston are slidably arranged in low pressure (LP) cylinder and are respectively formed with left piston chamber and right piston chamber in its left and right ends,
Its left and right ends is connected with the right high-pressure plunger being slidably arranged in the left high-pressure plunger and right high pressure cylinder in left high pressure cylinder respectively,
The low pressure (LP) cylinder be equipped with the first oil inlet runner, the second oil inlet runner, first control runner and second control runner, described first
Oil inlet runner and the second oil inlet runner are connected with oil inlet P, and the left and right ends of the low pressure (LP) cylinder are additionally provided with the first through-flow slot
With the second through-flow slot, the connectivity slot of annular is provided on the circumferential surface of the low-pressure piston；It is moved left in low-pressure piston to lead to first
When chute is completely covered by position, the first oil inlet runner and the first control runner are connected to by the connectivity slot, and low-pressure piston passes through
Closed left piston chamber is braked；When low-pressure piston is shifted to the right to it and the second through-flow slot is completely covered by position, the connection
Slot is by the second oil inlet runner and the second control runner connection, and low-pressure piston is braked by closed right piston chamber；
The pilot-operated type pilot operated directional control valve is provided with oil inlet runner, oil return runner, the first actuator port A, the second working oil
Mouthful B, the first control port X1 and the second control port X2, the oil inlet runner are connected with oil inlet P, the oil return runner and
The oil return inlet T is connected；The first actuator port A is divided into two-way, is connected all the way by the first through-flow slot with left piston chamber
Logical, another way is connected by the first connection right side of the check valve through left high pressure cylinder with left piston chamber；Second working oil
Mouth B is divided into two-way, is connected all the way by the second through-flow slot with right piston chamber, and another way is by the second connection check valve through right height
It is connected behind the left side of cylinder pressure with right piston chamber；The first control port X1 is connected with the first control runner, institute
The second control port X2 is stated to be connected with the second control runner；
The pilot-operated type pilot operated directional control valve includes pilot valve and main valve, and the pilot valve is two position three way directional control valve, described
Main valve is two-position four way change valve, and the oil inlet P 1 of the main valve and the oil inlet P 2 of pilot valve are all connected with oil inlet runner,
The oil return inlet T 1 of the main valve is connected with oil return runner, and the actuator port A1 of the main valve is connected with the first actuator port A,
The actuator port B1 of the main valve is connected with the second actuator port B, the left control of the actuator port A2 and main valve of the pilot valve
Chamber processed is connected, and the left control chamber of the main valve also passes through the 4th damping hole and communicates with oil return runner, the work of the pilot valve
Hydraulic fluid port B2 is connected with the right control chamber of main valve, and the right control chamber of the main valve also passes through third damping hole and oil return runner phase
It is logical；The left first guide cavity of the pilot valve is connected with the first control port X1, the right first guide cavity of the pilot valve and the second control
Hydraulic fluid port X2 is connected, and the left first guide cavity of the pilot valve also passes through the first damping hole and is connected with oil return runner, the pilot valve
Right first guide cavity also pass through the second damping hole and be connected with oil return runner.
Through the above technical solutions, it is complete to move to left and right ends by low-pressure piston when the double plunger pressure break pump work
The first control runner or the second control runner are connected to oil inlet when covering in the first through-flow slot or the second through-flow groove location, it is right
The pilot valve of pilot-operated type pilot operated directional control valve is triggered, and pilot valve is made first to commutate, then is carried out by pilot valve control bound
Commutation can guarantee to start when low-pressure piston toward when opposite direction movement in this way, and the displacement of main valve and low-pressure piston will not be mutual
It influences, and pilot valve changes the flow very little gone backward through in main valve, can reliably be maintained at commutation position, therefore the present invention is not necessarily to
Sucking and pressurization discharge circulation to fracturing fluid can be realized in automatically controlled control, without crankshaft, power input gear, connecting rod, profit
Sliding system and cooling system, components are few, structure is simple, at low cost；In addition, because low-pressure piston and left and right high-pressure plunger are all
Long stroke may be implemented in low-speed rectilinear movement, to improve effective suction efficiency, reduce jig frequency and improve the service life, and low pressure is living
Plug moves back and forth the primary imbibition that can be achieved twice and pressurization discharge, no-idle running, high-efficient；It is through-flow additionally by setting first
Slot and the second through-flow slot hide the first through-flow slot and the second through-flow slot when both ends move to certain position to low-pressure piston to the left and right
Lid is cut off oil liquid flow pass, is braked using completely enclosed left piston chamber and right piston chamber, can prevent low-pressure piston
With the collision of left high pressure cylinder and right high pressure cylinder, therefore impact noise will not be generated.
In further technical solution, when the main valve of the pilot-operated type pilot operated directional control valve is in left position, the oil inlet P 1
It is connected with actuator port B1, the actuator port A1 is connected with the oil return inlet T 1；It is described when the main valve is in right position
Actuator port P1 is connected with actuator port A1, and the actuator port B1 is connected with the oil return inlet T 1.
In further technical solution, when the pilot valve of the pilot-operated type pilot operated directional control valve is in left position, the oil inlet
P2 is connected with actuator port A2；When the pilot valve is in right position, the oil inlet P 2 is connected with actuator port B2.
In further technical solution, the left high pressure cylinder and right high pressure cylinder pass through first respectively and go out liquid check valve and second
Liquid check valve is connected to high pressure liquid outlet H out, and inlet V passes through the first feed liquor check valve and the second feed liquor check valve and a left side respectively
High pressure cylinder is connected to right high pressure cylinder.
It is described when low-pressure piston moves left to it and the first through-flow slot is completely covered by position in further technical solution
Low-pressure piston left side is greater than 20mm apart from low pressure (LP) cylinder left end distance；It is shifted to the right in low-pressure piston, and the second through-flow slot is complete
When covering position, the low-pressure piston right side is greater than 20mm apart from low pressure (LP) cylinder right end distance.Because of low-pressure piston and low pressure
Cylinder inner hole is interstitial fluid sealing cooperation, in order to guarantee when low-pressure piston has covered in the first through-flow slot and the second through-flow slot,
Will not continue the gap outflow between low-pressure piston and low pressure (LP) cylinder inner hole because of oil liquid causes low-pressure piston to continue to move and make
Fail at braking, enough seal lengths is needed, so distance of the low-pressure piston apart from both ends of the surface is at least more than 20mm.
In further technical solution, the is also connected between the oil inlet runner and the oil inlet P 2 of the pilot valve
Five damping holes.By the way that the 5th damping hole is arranged, more steady, the no impact of main valve commutation of pilot-operated type pilot operated directional control valve can be made.
(3) beneficial effect
Compared with prior art, technical solution of the present invention has the advantage that
When the double plunger pressure break pump work, by low-pressure piston move to left and right ends be completely covered by the first through-flow slot or
The first control runner or the second control runner are connected to oil inlet when the second through-flow groove location, to pilot-operated type pilot operated directional control valve
Pilot valve is triggered, and pilot valve is made first to commutate, then is commutated by pilot valve control bound, can guarantee to work as in this way
Low-pressure piston starts toward when opposite direction movement, and the displacement of main valve and low-pressure piston will not influence each other, and pilot valve is in main valve
The flow very little gone backward through is changed, can reliably be maintained at commutation position, therefore the present invention only needs to be connected with hydraulic pump, is not necessarily to
Complicated automatically controlled control can realize pressurization and sucking cyclic process to fracturing fluid, and low-pressure piston moves back and forth one
It is secondary, it can be achieved that sucking twice to fracturing fluid and pressurization discharge process, it is no-idle running, high-efficient, inputted without crankshaft, power
Gear, connecting rod, lubricating system and cooling system, structure are simple, at low cost；In addition, because low pressure (LP) cylinder and left and right high pressure cylinder are all
Long stroke may be implemented in low-speed rectilinear movement, to improve effective suction efficiency, reduce jig frequency and improve the service life；Additionally by
First through-flow slot and the second through-flow slot are set, when both ends move to certain position to low-pressure piston to the left and right by the first through-flow slot and
Second through-flow slot covers, and cuts off oil liquid flow pass, is braked using completely enclosed left piston chamber and right piston chamber, can be with
The collision of low-pressure piston and left high pressure cylinder and right high pressure cylinder is prevented, therefore impact noise will not be generated.
Detailed description of the invention
Fig. 1 is the hydraulic schematic diagram (low-pressure piston state in an intermediate position) of the embodiment of the present invention；
Fig. 2 is the hydraulic schematic diagram (low-pressure piston by right lateral turn left row state) of the embodiment of the present invention；
Fig. 3 is the hydraulic schematic diagram (low-pressure piston by left lateral turn right row state) of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of typical crank type plunger pump in the prior art.
Specific embodiment
Fig. 1-3 is please referred to, is currently preferred one embodiment, the present invention provides a kind of double plunger pressure of hydraulic-driven
Pump is split, is provided with oil inlet P, oil return inlet T, inlet V, high pressure liquid outlet H comprising pressurized cylinder and pilot-operated type liquid controlled reversing
Valve；Pressurized cylinder includes low pressure (LP) cylinder 4, low-pressure piston 6, left high-pressure plunger 5b, right high-pressure plunger 5a, left high pressure cylinder 3b and right high pressure cylinder
3a, low-pressure piston 6 are slidably arranged in low pressure (LP) cylinder 4 and are respectively formed with left piston chamber 4b and right piston chamber in its left and right ends
4a, left and right ends respectively with the right high pressure that is slidably arranged in the left high-pressure plunger 5b and right high pressure cylinder 3a in left high pressure cylinder 3b
Plunger 5a is connected, and low pressure (LP) cylinder 4 is equipped with the first oil inlet runner 10, the second oil inlet runner 8, first control runner 11 and the second control
Runner 9, the first oil inlet runner 10 and the second oil inlet runner 8 are connected with oil inlet P, and the left and right ends of low pressure (LP) cylinder 4 are also
Equipped with the first through-flow through-flow slot 4c of slot 4d and second, the connectivity slot 7 of annular is provided on the circumferential surface of low-pressure piston 6；In low-pressure piston 6
When moving left to it the first through-flow slot 4d being completely covered by position, the connectivity slot 7 flows the first oil inlet runner 10 and the first control
Road 11 is connected to, and low-pressure piston 6 is braked by closed left piston chamber 4b；It is shifted to the right in low-pressure piston 6 to lead to second
When chute 4c is completely covered by position, the second oil inlet runner 8 is connected to by the connectivity slot 7 with the second control runner 9, and low-pressure piston
6 are braked by closed right piston chamber 4a.It is understood that closed left piston chamber 4b refers to when low-pressure piston 6 will
After first through-flow slot 4d is completely covered by, the connection of left piston chamber 4b and the first actuator port A are cut off, the oil in left piston chamber 4b
Liquid can neither return the first actuator port A by the first through-flow slot 4d, can not be connected to check valve 15b by first reversely ended
The first actuator port A is returned, in addition also to be had centainly with the left end of low pressure (LP) cylinder 4 certainly in the left side of this position low-pressure piston 6
Distance could form cavity (left piston chamber 4b)；Similarly closed right piston chamber 4a refers to when low-pressure piston 6 is through-flow by second
After slot 4c is completely covered by, the connection of right piston chamber 4a and the second actuator port B are cut off, and the oil liquid in right piston chamber 4a can neither
The second actuator port B is returned by the second through-flow slot 4c, the second work can not be returned by the second connection check valve 15a reversely ended
Make hydraulic fluid port B, in addition also to have a certain distance with the right end of low pressure (LP) cylinder 4 just certainly in the right side of this position low-pressure piston 6
Cavity (right piston chamber 4a) can be formed.
Pilot-operated type pilot operated directional control valve is provided with oil inlet runner 16, oil return runner 17, the first actuator port A, the second working oil
Mouth B, the first control port X1 and the second control port X2, oil inlet runner 16 are connected with oil inlet P, oil return runner 17 and oil return
Mouth T-phase connection；First actuator port A is divided into two-way, is connected all the way by the first through-flow slot 4d with left piston chamber 4b, another way
It is connected by the first connection right side of the check valve 15b through left high pressure cylinder 3b with left piston chamber 4b；Second actuator port B is divided into
Two-way is connected by the second through-flow slot 4c with right piston chamber 4a all the way, and another way is by the second connection check valve 15a through right height
It is connected behind the left side of cylinder pressure 3a with right piston chamber 4a；The control runner 11 of first control port X1 and first is connected, and second
The control runner 9 of control port X2 and second is connected；
Pilot-operated type pilot operated directional control valve includes pilot valve 13 and main valve 12, and pilot valve 13 is two position three way directional control valve, main valve 12
For two-position four way change valve, the oil inlet P 1 of main valve 12 and the oil inlet P 2 of pilot valve 13 are all connected with oil inlet runner 16, main
The oil return inlet T 1 of valve 12 is connected with oil return runner 17, and the actuator port A1 of main valve 12 is connected with the first actuator port A, main valve
12 actuator port A2 is connected with the second actuator port B, the actuator port A2 of pilot valve 13 and the left control chamber 12b of main valve 12
It is connected, the left control chamber 12b of main valve 12 also passes through the 4th damping hole 14d and communicates with oil return runner 17, the work of pilot valve 13
Hydraulic fluid port B2 is connected with the right control chamber 12a of main valve 12, and the right control chamber 12a of main valve 12 also passes through third damping hole 14c and returns
Oil stream road 17 communicates；The left elder generation guide cavity 13b of pilot valve 13 is connected with the first control port X1, the right first guide cavity of pilot valve 13
13a is connected with the second control port X2, and the left elder generation guide cavity 13b of pilot valve 13 also passes through the first damping hole 14b and oil return runner
17 are connected, and the right elder generation guide cavity 13a of pilot valve 13 also passes through the second damping hole 14a and is connected with oil return runner 17.Pilot valve 13
Oil inlet P 2 and oil inlet runner 16 between be also connected with the 4th damping hole 14e.
When the pilot valve 13 of pilot-operated type pilot operated directional control valve is in left position, oil inlet P 2 is connected with actuator port A2；Guide
When valve 13 is in right position, oil inlet P 2 is connected with actuator port B2.
Left high pressure cylinder 3b and right high pressure cylinder 3a passes through first respectively and goes out liquid check valve 2b and second liquid check valve 2a and height out
Press juice mouth H connection, inlet V pass through respectively the first feed liquor check valve 1b and the second feed liquor check valve 1a and left high pressure cylinder 3b and
Right high pressure cylinder 3a connection.
When low-pressure piston 6 moves left to it and the first through-flow slot 4d is completely covered by position, 6 left side of low-pressure piston is apart from low
Cylinder pressure 4 left end distance is greater than 20mm；When low-pressure piston 6 is shifted to the right to it and the second through-flow slot 4c is completely covered by position, low pressure
6 right side of piston is greater than 20mm apart from 4 right end of low pressure (LP) cylinder distance.Because low-pressure piston 6 is that interstitial fluid is close with 4 inner hole of low pressure (LP) cylinder
Envelope cooperation will not be because of oil liquid in order to guarantee when low-pressure piston 6 has covered in the through-flow slot 4c of the first through-flow slot 4d and second
Continue that low-pressure piston 6 is caused to continue to move and braking is caused to lose from the gap outflow between 4 inner hole of low-pressure piston 6 and low pressure (LP) cylinder
It loses, so distance of the low-pressure piston 6 apart from both ends of the surface is at least more than 20mm.
Working principle of the present invention is as follows:
Using when oil inlet P of the invention is connected with hydraulic pump outlet, oil return inlet T is connected with fuel tank, inlet V and pressure
It splits liquid input channel to be connected, high pressure liquid outlet H is connected with fracturing fluid output channel.Assuming that 12 initial position of main valve is in left position,
As shown in figure 3, then oil inlet P 1 is connected with actuator port A1, actuator port B1 is connected with oil return inlet T 1, one side oil liquid
Left piston chamber 4b is entered by the first connection check valve 15b after main valve 12, the first actuator port A by oil inlet P and pushes piston 6
It moves right, another aspect fracturing fluid enters left high pressure cylinder 3b through the first feed liquor check valve 1b and carries out filling liquid, right piston chamber 4a's
Oil liquid returns to fuel tank, right increasing through the second through-flow slot 4c, the second actuator port B, actuator port B1, oil return inlet T 1, oil return runner 17
Fracturing fluid in cylinder pressure 3a goes out liquid check valve 2a by second after being pressurized and reaches high pressure liquid outlet H.It is incited somebody to action when piston 6 moves right
When second through-flow slot 4c is completely covered by (as shown in Figure 2), the oil liquid of right piston chamber 4a cannot be discharged by the second through-flow slot 4c again, living
Plug 6 can be braked under the action of closed right piston chamber 4a, and the second oil inlet runner 8 passes through connectivity slot 7 and the second control runner 9
Enter the right first guide cavity 13a of pilot valve 13 after being connected through the first control port X1, sets up pressure promotion in right elder generation guide cavity 13a
Pilot valve 13 commutates to right position, and the oil liquid of left elder generation guide cavity 13b all reaches oil return opening after the first damping hole 14b, oil return runner 17
T, oil inlet P 2 is connected with actuator port B2 at this time, and the oil liquid of oil inlet P enters main valve 12 through oil inlet P 2, actuator port B2
Right control chamber 12a control bound 12 commutate to right position, the oil liquid of left control chamber 12b flows into oil return stream by the 4th damping hole 14d
Road 17；After main valve 12 commutates to right position, hydraulic pump outlet oil liquid is through oil inlet P, oil inlet P 1, actuator port B1, the second work
Entering right piston chamber 4a after hydraulic fluid port B, the second connection check valve 15a, (meanwhile the fracturing fluid liquid of inlet V is unidirectional through the second feed liquor
Valve 1a enters right pressurized cylinder 3a and carries out filling liquid) push low-pressure piston 6 to move downward, the oil liquid in left piston chamber 4b is through-flow through first
Oil return inlet T is reached after slot 4d, the first actuator port A, actuator port A1, oil return inlet T 1, oil return runner 17, in left high pressure cylinder 3b
Fracturing fluid after being pressurized by first go out liquid check valve 2b be discharged to high pressure liquid outlet H, when piston 6 move downward it is through-flow by first
When slot 4d is completely covered by position, the oil liquid in left piston chamber 4b cannot be discharged by the first through-flow slot 4d again, and piston 6 can be closed
It is braked under the action of left piston chamber 4b, and the first oil inlet runner 10 is connected by connectivity slot 7 with the first control runner 11, hydraulic fluid port
The oil liquid of P successively controls runner 11, the second control port X2, into pilot valve through the first oil inlet runner 10, through-flow slot 7, first
13 left elder generation guide cavity 13b pushes pilot valve 13 to commutate to left position, and the oil liquid in right elder generation guide cavity 13a is flowed back to through the first damping hole 14a
Oil return inlet T, after pilot valve 13 commutates to left position, main valve 12 commutates to left position, the oil liquid warp of oil inlet P by the control of pilot valve 13
Oil inlet P 1, the first actuator port A, the first connection check valve 15b enter left piston chamber 4b, and piston 6 is pushed to move right pressurization,
So far circulation is completed.As long as oil inlet P has oil liquid persistently to supply, double plunger fracturing pump of the invention will move back and forth into
Row filling liquid, the cyclic process for being pressurized drain.
It is only the preferred embodiment of the present invention described in top, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of double plunger fracturing pump of hydraulic-driven is provided with oil inlet P, oil return inlet T, inlet V and high pressure liquid outlet H,
It is characterised in that it includes pressurized cylinder and pilot-operated type pilot operated directional control valve；
The pressurized cylinder includes low pressure (LP) cylinder, low-pressure piston, left high-pressure plunger, right high-pressure plunger, left high pressure cylinder and right high pressure cylinder, institute
Low-pressure piston is stated to be slidably arranged in low pressure (LP) cylinder and be respectively formed with left piston chamber and right piston chamber, left and right in its left and right ends
Both ends are connected with the right high-pressure plunger being slidably arranged in the left high-pressure plunger and right high pressure cylinder in left high pressure cylinder respectively, described low
Cylinder pressure is equipped with the first oil inlet runner, the second oil inlet runner, the first control runner and the second control runner, the first oil inlet stream
Road and the second oil inlet runner are connected with oil inlet P, and the left and right ends of the low pressure (LP) cylinder are additionally provided with the first through-flow slot and second
Through-flow slot is provided with the connectivity slot of annular on the circumferential surface of the low-pressure piston；It is moved left in low-pressure piston, and the first through-flow slot is complete
When complete hiding position, the first oil inlet runner and the first control runner are connected to by the connectivity slot, and low-pressure piston is by closed
Left piston chamber is braked；When low-pressure piston is shifted to the right to it and the second through-flow slot is completely covered by position, the connectivity slot is by
Two oil inlet runners and the second control runner connection, and low-pressure piston is braked by closed right piston chamber；
The pilot-operated type pilot operated directional control valve be provided with oil inlet runner, oil return runner, the first actuator port A, the second actuator port B,
First control port X1 and the second control port X2, the oil inlet runner are connected with oil inlet P, the oil return runner and described
Oil return inlet T is connected；The first actuator port A is divided into two-way, is connected all the way by the first through-flow slot with left piston chamber, separately
It is connected all the way by the first connection right side of the check valve through left high pressure cylinder with left piston chamber；The second actuator port B points
At two-way, it is connected all the way by the second through-flow slot with right piston chamber, another way is by the second connection check valve through right high pressure cylinder
Left side after be connected with right piston chamber；The first control port X1 is connected with the first control runner, and described the
Two control port X2 are connected with the second control runner；
The pilot-operated type pilot operated directional control valve includes pilot valve and main valve, and the pilot valve is two position three way directional control valve, the main valve
For two-position four way change valve, the oil inlet P 1 of the main valve and the oil inlet P 2 of pilot valve are all connected with oil inlet runner, described
The oil return inlet T 1 of main valve is connected with oil return runner, and the actuator port A1 of the main valve is connected with the first actuator port A, described
The actuator port A2 of main valve is connected with the second actuator port B, the actuator port A2 of the pilot valve and the left control chamber of main valve
It is connected, the left control chamber of the main valve also passes through the 4th damping hole and communicates with oil return runner, the actuator port of the pilot valve
B2 is connected with the right control chamber of main valve, and the right control chamber of the main valve also passes through third damping hole and communicates with oil return runner；Institute
The left first guide cavity for stating pilot valve is connected with the first control port X1, the right first guide cavity of the pilot valve and the second control port X2
It is connected, the left first guide cavity of the pilot valve also passes through the first damping hole and is connected with oil return runner, the right elder generation of the pilot valve
Guide cavity also passes through the second damping hole and is connected with oil return runner.
2. double plunger fracturing pump according to claim 1, which is characterized in that at the main valve of the pilot-operated type pilot operated directional control valve
When left position, the oil inlet P 1 is connected with actuator port A1, and the actuator port B1 is connected with the oil return inlet T 1；Institute
When stating main valve and being in right position, the actuator port P1 is connected with actuator port B1, the actuator port A1 and the oil return opening
T1 is connected.
3. -2 described in any item double plunger fracturing pumps according to claim 1, which is characterized in that the pilot-operated type pilot operated directional control valve
Pilot valve when being in left position, the oil inlet P 2 is connected with actuator port A2；When the pilot valve is in right position, it is described into
Hydraulic fluid port P2 is connected with actuator port B2.
4. double plunger fracturing pump according to claim 1, which is characterized in that the left high pressure cylinder and right high pressure cylinder lead to respectively
Cross first go out liquid check valve and second go out liquid check valve be connected to high pressure liquid outlet H, it is unidirectional that inlet V passes through the first feed liquor respectively
Valve and the second feed liquor check valve are connected to left high pressure cylinder and right high pressure cylinder.
5. double plunger fracturing pump according to claim 1, which is characterized in that it is through-flow by first to move left to it in low-pressure piston
When slot is completely covered by position, the low-pressure piston left side is greater than 20mm apart from low pressure (LP) cylinder left end distance；On the low-pressure piston right side
When moving on to it the second through-flow slot being completely covered by position, the low-pressure piston right side is greater than apart from low pressure (LP) cylinder right end distance
20mm。
6. double plunger fracturing pump according to claim 1, which is characterized in that in the oil inlet runner and the pilot valve
The 5th damping hole is also connected between oil inlet P 2.
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| CN201810480276.2A CN108730148B (en) | 2018-05-18 | 2018-05-18 | A kind of double plunger fracturing pump of hydraulic-driven |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810480276.2A CN108730148B (en) | 2018-05-18 | 2018-05-18 | A kind of double plunger fracturing pump of hydraulic-driven |
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| CN108730148B true CN108730148B (en) | 2019-07-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110578728A (en) * | 2019-10-11 | 2019-12-17 | 广东冠邦科技有限公司 | Automatic change valve |
| CN111120240A (en) * | 2019-12-25 | 2020-05-08 | 邵延荣 | Submersible pump |
| CN111120427B (en) * | 2020-02-22 | 2021-07-06 | 宁波真格液压科技有限公司 | Double-plunger supercharger |
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| CN102287407A (en) * | 2011-09-19 | 2011-12-21 | 宁波汉商液压有限公司 | Double-action reciprocating hydraulic booster |
| CN105782147A (en) * | 2014-12-15 | 2016-07-20 | 西安众智惠泽光电科技有限公司 | Double-acting hydraulic control system of supercharging device |
| CN106523335A (en) * | 2016-08-25 | 2017-03-22 | 湖南莫尔顿智能勘探机器人有限公司 | Automatic reversing water pump |
| CN206338261U (en) * | 2016-11-17 | 2017-07-18 | 晏万文 | Ultrahigh-pressure hydraulic pressure charging system with fast discharging component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10158182B4 (en) * | 2001-11-28 | 2005-06-02 | Minibooster Hydraulics A/S | Double-acting hydraulic pressure booster |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287407A (en) * | 2011-09-19 | 2011-12-21 | 宁波汉商液压有限公司 | Double-action reciprocating hydraulic booster |
| CN105782147A (en) * | 2014-12-15 | 2016-07-20 | 西安众智惠泽光电科技有限公司 | Double-acting hydraulic control system of supercharging device |
| CN106523335A (en) * | 2016-08-25 | 2017-03-22 | 湖南莫尔顿智能勘探机器人有限公司 | Automatic reversing water pump |
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Effective date of registration: 20190627 Address after: 257000 Kaiyuan Road, Haojia Modern Service Area, Kenli District, Dongying City, Shandong Province Applicant after: Shengli Oil Field East strong Electromechanical Equipment Manufacturing Co Ltd Address before: 523000 Dongguan City, Guangdong Province, Songshan Lake High-tech Industrial Development Zone Headquarters, No. 2, No. 1 District, No. 2, No. 201 Applicant before: Dongguan hate Paavo Hydraulic Technology Co., Ltd. |
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