CN105605012B - Pressure differential automatic switch and rotation pump perforating piling machine hydraulic control system - Google Patents
Pressure differential automatic switch and rotation pump perforating piling machine hydraulic control system Download PDFInfo
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- CN105605012B CN105605012B CN201610011479.8A CN201610011479A CN105605012B CN 105605012 B CN105605012 B CN 105605012B CN 201610011479 A CN201610011479 A CN 201610011479A CN 105605012 B CN105605012 B CN 105605012B
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- 239000012530 fluid Substances 0.000 claims abstract description 197
- 210000003739 neck Anatomy 0.000 claims abstract description 8
- 239000002689 soil Substances 0.000 claims description 161
- 230000033001 locomotion Effects 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 360
- 230000006835 compression Effects 0.000 description 20
- 238000007906 compression Methods 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000010720 hydraulic oil Substances 0.000 description 8
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
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- General Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
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Abstract
The present invention provides a kind of pressure differential automatic switch, it is characterised in that：With valve pocket, being arranged with valve pocket on a valve element, valve element has twice annular groove and forms two necks, and valve element remainder is in two ends and a middle part；The two ends of valve pocket respectively have hydraulic fluid port, the middle part of valve pocket has two hydraulic fluid ports, two hydraulic fluid ports at the middle part of valve pocket are located on a radial section of valve pocket, there is the little spring compressed and the big spring compressed in valve pocket, little spring and big spring are located at the both sides of valve element, contact is distinguished on valve pocket end and valve element in the two ends of little spring, and contact is distinguished on another end of valve pocket and valve element in the two ends of big spring；The rigidity of little spring is less than big spring；The hydraulic fluid port of one end of valve pocket is connected with a hydraulic fluid port in the middle part of valve pocket, and the hydraulic fluid port of the other end of valve pocket is connected with another hydraulic fluid port in the middle part of valve pocket.The present invention allows the piston of several oil cylinders to form Methodistic priority motion by pressure differential automatic switch.
Description
Technical field
The invention belongs to hydraulic system component, more particularly to a kind of pressure differential automatic switch.
Background technology
In hydraulic control system used in hydraulic test, it is sometimes desirable to which the piston movement of multiple oil cylinders is set
Put, namely the oil cylinder piston having needs first to move, some oil cylinder pistons are moved after needing, to reach certain hydraulic control mesh
, so needing pressure differential automatic switch.
" the rotation pump perforating piling machine " of Patent No. 201110116411.3 provides a kind of rotation pump perforating piling machine, wherein having
Unidirectional mud pump valve 7 ", as shown in figure 1, have in the unidirectional valve body of mud pump valve 7 " two check valve sheets 73 " being hinged in valve body,
74 ", the convergence of entrance 71 " of unidirectional mud pump valve 7 ", which connects, has set soil suction pipeline 6, and the outlet 72 " of unidirectional mud pump valve 7, which connects, sets mud tube
60, a hydraulic interface 75 " of unidirectional mud pump valve 7 " bores high-pressure hydraulic power soil suction compression pump 2 with golden steel and is connected.
Jin Gang bores high-pressure hydraulic power soil suction compression pump 2 and the oil cylinder that can be described as soil suction oil cylinder is preferred, soil suction oil cylinder
Move back and forth just can produce malleation and negative pressure in unidirectional mud pump valve 7 " as described below.
As shown in Fig. 2 sandstone soil is rubbed into mud weak soil by the rotation pump perforating piling machine using spark soil suction drill bit 5,
Meanwhile, the golden steel of high pressure liquid force feed driving that ground active force pump is provided by high-pressure oil pipe 22 bores high-pressure hydraulic power soil suction pressure
Pump 2 makes to produce negative pressure in unidirectional mud pump valve 7, and at this moment to open its corresponding for the rotate counterclockwise of check valve sheet 73 " in direction shown in Fig. 1
Passage, the rotate counterclockwise of check valve sheet 74 " closes its corresponding passage, because being negative pressure in unidirectional mud pump valve 7 " so as to mud weak soil
Sucked, be inhaled into by entrance 71 " in unidirectional mud pump valve 7 " by each soil suction pipeline 6.
The golden steel of high pressure liquid force feed driving provided again by ground active force pump by high-pressure oil pipe 22 bores high-pressure hydraulic power
Soil suction compression pump 2 makes to produce malleation in unidirectional mud pump valve 7 ", and at this moment the check valve sheet 73 " in direction shown in Fig. 1 turns clockwise pass
Close its corresponding passage, check valve sheet 74 " turns clockwise opening its corresponding passage, because be malleation in unidirectional mud pump valve 7 " from
And mud weak soil is forced out outlet 72 ", it is output to from mud tube 60 behind ground and leads to mud pit.
The check configuration of above-mentioned unidirectional mud pump valve 7 ", which is set, can ensure that mud does not flow back downwards because of gravity and only can not
It is disconnected earthward to convey.
Above-mentioned unidirectional mud pump valve when in use, because check valve sheet 73 ", 74 " is hinged in valve body, completely by valve body
Interior malleation and negative pressure driving check valve sheet 73 ", 74 " are rotated so that its corresponding passage is turned on and off automatically, so, make
It is used time, dense due to mud, it is impossible to smoothly to close in time, so probably due to the obstruction generation leakage situation of silt,
For example, when check valve sheet 73 " to rotate clockwise closing entrance 71 " when, silt may at the pin joint of check valve sheet 73 " shadow
Ring its rotation, it is also possible to withstand check valve sheet 73 " at check valve sheet 73 " and the closing point of valve body, it is not closed completely, mud
Come out at gap.Such case may also occur for check valve sheet 74 ".
In addition, when local bottom slurry pressure increases suddenly, normal pressure has been insufficient to allow check valve sheet 73 " to close,
Will at this time occur the situation that check valve sheet 73 " can not be closed.
The unidirectional mud pump valve 7 " of rotation pump perforating piling machine only one of which of said structure, because its action is that slurry-sucking enters unidirectional mud
Pump valve 7 ", pressure mud goes out unidirectional mud pump valve 7 ", so mud, which is interval, is forced into that mud tube is defeated to ground again, whole process has
Interval, have impact on the efficiency of slurry-sucking.
In order to improve the efficiency for the slurry-sucking for revolving pump perforating piling machine, two individual event mud can be installed in rotation pump perforating piling machine
Pump valve.
For example：
A：The structure of unidirectional slush pump：
As shown in figure 3, unidirectional mud pump valve 7 has valve body, valve body includes the branch pipe pipeline joint 70 in the middle part of main pipeline, main pipeline
Be connected with branch pipe(tube) 750, the upper end of main pipeline is connected for outlet 72 and with mud tube 60, the lower end of main pipeline for entrance 71 and with
Soil suction pipeline 6 is connected, and the end 75 of branch pipe(tube) 750 is that hydraulic interface is connected with soil suction compression pump 2.
Main pipeline is made up of entrance 710 and outlet section 720, position of the main pipeline between entrance 71 and branch pipe pipeline joint 70
Entrance 710 is set to, main pipeline is exporting the position between 72 and branch pipe pipeline joint 70 for outlet section 720, namely branch pipe(tube) connects
Mouth 70 is boundary.Entrance 710 is coaxial with branch pipe(tube) 750 in the present embodiment, and outlet section 720 is by branch pipe pipeline joint 70
The side stretching to entrance 710 is put, and outlet section 720 is made up of an arch section and straight-tube portion.
Entrance 710 is connected to the piston rod 732 of an oil cylinder 731 provided with an entrance valve block 73, entrance valve block 73
End, the axis of the entrance 710 of the corresponding position of entrance valve block 73 is vertical, the Driver Entry valve block 73 of piston rod 732
Move back and forth, entrance valve block 73 can completely close or open entrance 710.
Outlet section 720 is provided with one outlet valve block 74, and outlet valve block 74 is connected to the piston rod 742 of an oil cylinder 741
End, the tangent line of the axis of the outlet section 720 of outlet valve block 74 corresponding position is vertical, the piston rod 742 driving outlet
Valve block 74 is moved back and forth, and outlet valve block 74 can completely close or open outlet section 720.
Above-mentioned oil cylinder 731,741, which all connects, is set to hydraulic control system 700, can be with so as to be hydraulically controlled the control of system 700
Running in order.
When actual use, it is assumed that original state is that entrance valve block 73 is closed, outlet valve block 74 is opened, then next：
Sandstone soil is rubbed into mud weak soil by the rotation pump perforating piling machine in such as Fig. 2 using spark soil suction drill bit 5, together
When, the golden steel of high pressure liquid force feed driving that ground active force pump is provided by high-pressure oil pipe 22 bores high-pressure hydraulic power soil suction compression pump
2 make to produce in unidirectional mud pump valve 7 negative pressure (or produces negative pressure, the thick stick of soil suction oil cylinder using the cylinder movement that can be described as soil suction oil cylinder
Bar is moved upwards, drives outlet valve block 74 and entrance valve block 73 in the piston upwards of its lever end, unidirectional mud pump valve 7
Between space increase in space and branch pipe(tube) 750, negative pressure is produced, with boring high-pressure hydraulic power soil suction compression pump 2 using golden steel
Effect be identical), the control cylinder 741 of hydraulic control system 700 and oil cylinder 731 make outlet valve block 74 first close, inlet valve
Piece 73 is opened again, due to suction function, and each soil suction pipeline 6 sucks mud weak soil, is inhaled into by entrance 71 in unidirectional mud pump valve 7
Outlet valve block 74 and entrance valve block 73 between space in space and branch pipe(tube) 750.
Then the control cylinder 731 of hydraulic control system 700 and oil cylinder 741, entrance valve block 73 are first closed, and outlet valve block 74 is again
Open, then the golden steel of high pressure liquid force feed driving provided by ground active force pump by high-pressure oil pipe 22 bores high-pressure hydraulic power soil suction
Compression pump 2 makes to produce in unidirectional mud pump valve 7 malleation and (or produces malleation, soil suction oil using the cylinder movement that can be described as soil suction oil cylinder
The lever of cylinder is moved downward, and drives the piston of its lever end to move downward, outlet valve block 74 and entrance in unidirectional mud pump valve 7
Reduced space between valve block 73 in space and branch pipe(tube) 750, produces malleation, with boring high-pressure hydraulic power soil suction pressure using golden steel
The effect of power pump 2 is identical), because being malleation in unidirectional mud pump valve 7, so as to outlet valve block 74 in unidirectional mud pump valve 7 and enter
The mud weak soil that space between mouthful valve block 73 in space and branch pipe(tube) 750 is housed is forced out outlet 72, defeated from mud tube 60
Go out to after ground towards mud pit.
Valve block 74 and entrance valve block 73 are exported by hydraulic system force switch, switch is reliable, does not produce leakage phenomenon, it is to avoid
Mud flows backwards.
Unidirectional mud pump valve 7 is used to revolve pump perforating piling machine, the position of the unidirectional mud pump valve 7 " of original in fig. 2, is provided with side by side
Two unidirectional slush pumps 7,7 ', two unidirectional slush pumps 7,7 ' all connect soil suction pipeline 6 and mud tube 60.
Unidirectional slush pump 7 connects golden steel and bores high-pressure hydraulic power soil suction compression pump 2, and unidirectional slush pump 7 connects golden steel and bores high
Hydraulic fluid pressure power soil suction compression pump 2'.
The structure of two unidirectional slush pumps 7,7 ' is the same, is controlled by hydraulic control system 700.
During the action of the one of progress suction mud of two unidirectional slush pumps 7,7 ', another carries out extruding the dynamic of mud
Make, vice versa.
Above actuation cycle, two unidirectional slush pumps 7,7 ' alternations, it is possible to incessantly extract mud out.
Hydraulic control system 700 can be the circuit control system of single-chip microcomputer form.
If it is desired that using mechanical type hydraulic control system, it is necessary to hydraulic stroke automatic diverter valve.
Use reversal valve, hydraulic stroke automatic diverter valve and pressure differential automatic switch group described in following B, C, D, E part
Close and form control system.
B：The structure of hydraulic stroke automatic diverter valve：
As shown in Figure 4, Figure 5, it is hydraulic stroke automatic diverter valve 3, the valve pocket 30 of hydraulic stroke automatic diverter valve 3 is cylinder
Shape, hydraulic stroke automatic diverter valve 3 has entrance in two ends of valve pocket 30, and respectively valve element end entrance 31 and spring terminal enters
Mouth 32, hydraulic stroke automatic diverter valve 3 has at the middle part of valve pocket 30 is provided with valve element 34 and spring 35 in outlet 33, valve pocket 30.
Valve element 34 has two ends 341,342, and valve element 34 is so that end 341,342 coordinates the inwall of valve pocket 30 and makes valve element
34 are movably set in valve pocket 30, and the middle part of valve element 34 is less than the neck of two ends 341,342 of valve element 34 for diameter
343, valve element 34, which is located in the side towards valve element end entrance 31 of hydraulic stroke automatic diverter valve 3, valve element 34, has passage
340, the outer surface of the end face and neck 343 towards valve element end entrance 31 of the UNICOM's valve element 34 of passage 340.
Spring 35 is located at the side towards spring end entrance 32 of hydraulic stroke automatic diverter valve 3, one end contact of spring 35
On hydraulic stroke automatic diverter valve 3, other end contact is on valve element 34.
So, when valve element end entrance 31 is identical with the oil pressure of spring end entrance 32, outlet is blocked in the end 342 of valve element 34
33, the state in Fig. 4；When the oil pressure of valve element end entrance 31 is more than the oil pressure of spring end entrance 32, valve element 34 can be moved simultaneously
Compression spring 35, when the alignment of neck 343 outlet 33, the oil entered by valve element end entrance 31 can enter neck by passage 340
Space corresponding to 343 outer surface is simultaneously flowed out from outlet 33, at this moment the state in Fig. 5；When valve element end entrance 31 and spring
The oil pressure of end entrance 32 recovers mutually simultaneously as the elastic force of spring 35, valve element 34 can set back, and the end 342 of valve element 34 is blocked up
33 are firmly exported, at this moment the state in Fig. 4.
In other embodiments, simply it can also be coordinated using a cylindrical valve spool 34 with valve pocket 30.Work as long as reaching
When valve element end entrance 31 is identical with the oil pressure of spring end entrance 32, outlet 33 is blocked in the end of valve element 34；When valve element end entrance 31
Oil pressure be more than spring end entrance 32 oil pressure when valve element 34 move, from valve element end entrance 31 enter oil can from outlet 33 flow
Go out.
C：The control to two soil suction oil cylinders is realized with hydraulic pressure automatic change valve：
As shown in Fig. 6, Fig. 7, Fig. 8, Fig. 9：
The unidirectional correspondence of mud pump valve 7 installs a soil suction oil cylinder 1, and this soil suction oil cylinder 1 is exactly to play described in A above
Soil suction compression pump 2 effect, the piston that the outer end of piston rod 11 of soil suction oil cylinder 1 is connected is connected with end 75, so as to inhale
The reciprocating motion of the pistons of native oil cylinder 1 can make to be alternately present malleation and negative pressure in unidirectional mud pump valve 7.
Similarly, unidirectional mud pump valve 7' correspondences install a soil suction oil cylinder 1', the outer end of the piston rod 11 ' institute of soil suction oil cylinder 1 '
The piston of connection is connected with end 75 '
Reversal valve 100 has hydraulic fluid port 101, hydraulic fluid port 102, hydraulic fluid port 103, hydraulic fluid port 104, when hydraulic fluid port 101 is connected with hydraulic fluid port 103
When, hydraulic fluid port 102 is connected with hydraulic fluid port 104；After commutation, hydraulic fluid port 101 is connected with hydraulic fluid port 104, and hydraulic fluid port 102 is connected with hydraulic fluid port 103.Commutation
Valve 100 has control mouth 105, control mouth 106.
High-pressure oil pipe 22 includes oil inlet pipe 221 and flowline 222, and oil inlet pipe 221 is connected on the hydraulic fluid port 101 of reversal valve 100,
Flowline 222 is connected on the hydraulic fluid port 102 of reversal valve 100.
12 points by piston of soil suction oil cylinder 1 is epicoele 13 and cavity of resorption 14, and the hydraulic fluid port 103 and epicoele 13 of reversal valve 100 are with oil pipe
Connection, epicoele 13 has valve element end entrance 31 and spring end entrance 32 of two oil pipes respectively with hydraulic stroke automatic diverter valve 3 to connect
It is logical, also, the distance of oil pipe mouthful to the piston 12 of the connection valve element of soil suction oil cylinder 1 end entrance 31 is less than the connection bullet of soil suction oil cylinder 1
The oil pipe mouthful of spring end entrance 32 arrives the distance of piston 12, also, the oil pipe mouthful of the connection valve element of soil suction oil cylinder 1 end entrance 31 arrives piston
The oil pipe mouthful that 12 distance is less than the connection hydraulic fluid port 103 of soil suction oil cylinder 1 arrives the distance of piston 12 (so, by following reality
After motion, cavity of resorption 14 and cavity of resorption 14' are related all without with oil inlet pipe 221 and flowline 222, in cavity of resorption 14 and cavity of resorption 14'
Oil mass be only constant, will not occur confusion).The outlet 33 of hydraulic stroke automatic diverter valve 3 and the control mouth of reversal valve 100
105 are connected with oil pipe.
Soil suction oil cylinder 1' is epicoele 13' and cavity of resorption 14' by piston 12' points, the hydraulic fluid port 104 and epicoele 13' of reversal valve 100 with
Oil pipe is connected, and epicoele 13' has valve element end entrance 31' and spring terminal of two oil pipes respectively with hydraulic stroke automatic diverter valve 3' to enter
Mouth 32' connections, also, soil suction oil cylinder 1' connection valve element end entrances 31' oil pipe mouthful to piston 12' distance is less than soil suction oil
Cylinder 1' connecting spring end entrances 32' oil pipe mouthful arrives piston 12' distance, also, connection valve element end entrance 31' oil pipe mouthful is arrived
Piston 12' distance is less than the oil pipe mouthful of soil suction oil cylinder 1' connections hydraulic fluid port 104 to piston 12' distance.Hydraulic stroke is automatic
Reversal valve 3' outlet 33' is connected with the control mouth 106 of reversal valve 100 with oil pipe.
Above-mentioned cavity of resorption 14 is connected with cavity of resorption 14' with oil pipe.
During actual operation：
Such as Fig. 6, when hydraulic fluid port 101 is connected with hydraulic fluid port 103, hydraulic fluid port 102 is connected with hydraulic fluid port 104；
High pressure liquid force feed promotes piston 12 descending, at this moment unidirectionally from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 103 to epicoele 13
Malleation is produced in mud pump valve 7, mud weak soil is forced out outlet 72, be output to from mud tube 60 behind ground and lead to mud pit.Simultaneously
Oil in cavity of resorption 14 is pressed against in cavity of resorption 14', and piston 12', which is promoted, to be risen, and the oil in epicoele 13' is passed through hydraulic fluid port 104, hydraulic fluid port
102, which are sent to flowline 222, is sent out, and negative pressure is at this moment produced in unidirectional mud pump valve 7', and suction mud weak soil enters unidirectional mud pump valve 7'.
During this, because valve element end entrance 31 and spring end entrance 32 are connected with epicoele 13 always, so spool end
The oil pressure of entrance 31 and spring end entrance 32 is identical, so being Fig. 4 state, outlet 33 is blocked in the end 342 of valve element 34,
Outlet 33 is without oil output.Similarly, because valve element end entrance 31' and spring end entrance 32' are connected with epicoele 13' always, so
Valve element end entrance 31' and spring end entrance 32' oil pressure are identicals, and valve element 34' end 342' blocks outlet 33', outlet
33' is exported without oil.
Such as Fig. 7, when piston 12' rises above the position of soil suction oil cylinder 1' connection valve element end entrances 31' oil pipe, but
The position of soil suction oil cylinder 1' connecting spring end entrances 32' oil pipe can not be reached, this position should be set to piston 12'
Rise in place, enough mud weak soils have been sucked in unidirectional mud pump valve 7', and piston 12 has descended to position, unidirectional mud valve
Mud weak soil in 7 is forced out substantially.
At this moment, what valve element end entrance 31' was inputted is cavity of resorption 14' oil, and spring end entrance 32' inputs are epicoele 13'
Oil, cavity of resorption 14' oil pressure is more than epicoele 13' oil pressure (so piston 12' can rise), so, valve element end entrance 31' oil
Oil pressure of the pressure more than spring end entrance 32', reaches Fig. 5 state, and the oil entered by valve element end entrance 31' can be from outlet 33' streams
Go out, at this moment the state in Fig. 7, outlet 33' oil enters control mouth 106, so, reversal valve 100 is controlled by this oil, is occurred
Commutation, becomes hydraulic fluid port 101 and is connected with hydraulic fluid port 104, hydraulic fluid port 102 is connected with hydraulic fluid port 103.
Such as Fig. 8, so, high pressure liquid force feed promotes piston 12' from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 104 to epicoele 13'
It is descending, malleation is at this moment produced in unidirectional mud pump valve 7', mud weak soil is forced out outlet 72', is output to from mud tube 60 behind ground
Towards mud pit.The oil in cavity of resorption 14' is pressed against in cavity of resorption 14 simultaneously, and piston 12, which is promoted, to be risen, and the oil in epicoele 13 is led to
Cross hydraulic fluid port 103, hydraulic fluid port 102 to be sent to flowline 222 and send out, negative pressure is at this moment produced in unidirectional mud pump valve 7, suction mud weak soil enters
Unidirectional mud pump valve 7.
Piston 12' declines, because valve element end entrance 31' and spring end entrance 32' has recovered what is connected always with epicoele 13'
State, so valve element end entrance 31' and spring end entrance 32' oil pressure are identicals, so returning to Fig. 4 state, valve element
34' end 342' blocks outlet 33', and outlet 33' is exported without oil.Similarly, since valve element end entrance 31 and spring end entrance
32 connect with epicoele 13 always, so the oil pressure of valve element end entrance 31 and spring end entrance 32 is identical, so valve element 34
Outlet 33 is blocked in end 342, and outlet 33 is without oil output.
Such as Fig. 9, when piston 12 rises above the position of the oil pipe of the connection valve element of soil suction oil cylinder 1 end entrance 31, but not
The position of the oil pipe of the connecting spring end entrance 32 of soil suction oil cylinder 1 can be reached, this position should be set to piston 12 and rise
In place, enough mud weak soils have been sucked in unidirectional mud pump valve 7, and piston 12' is had descended in position, unidirectional mud valve 7'
Mud weak soil be forced out substantially.
At this time according to identical process above, the oil of outlet 33 enters control mouth 105, and so, reversal valve 100 is by this
Oil control, is commutated, becomes hydraulic fluid port 101 and connected with hydraulic fluid port 103, hydraulic fluid port 102 is connected with hydraulic fluid port 104.
An actuation cycle is so completed, so circulation is achieved that the unidirectional soil suction of mud valve 7 enters fashionable, unidirectional dredge pump
Valve 7' firmings are gone out, soil suction and firming in place after, the unidirectional firming of mud valve 7 is switched to automatically and is gone out, unidirectional mud pump valve 7' soil suctions are entered
Enter.
Above actuation cycle, two unidirectional slush pumps 7,7 ' alternations, it is possible to incessantly extract mud out.
But, it is necessary to following to entrance valve block and outlet valve during two unidirectional slush pumps 7,7' alternations
The control of piece is just avoided that mud flows backwards：
When soil suction oil cylinder 1 piston movement to it is most upper when, soil suction is finished, at this moment the entrance valve block 73 of slush pump 7 be open
, outlet valve block 74 is to close, and at this moment reversal valve 100 is commutated, and the piston of soil suction oil cylinder 1 will be moved downward, and carries out firming, this
When should have one than it is relatively rapid action entrance valve block 73 is first closed, outlet valve block 74 open again, because if outlet valve
Piece 74 is first opened and entrance valve block 73 is not closed, and the main pipeline of this slush pump 7 is logical, and mud can flow backwards, namely control
The oil cylinder 731 of entrance valve block 73 processed will be acted first, and the oil cylinder 741 of control outlet valve block 74 is acted after wanting, and then keeps inlet valve
The state of the opening of valve block 74 is closed and exported to piece 73, carries out firming；
Conversely, when the piston movement of soil suction oil cylinder 1 is to when most descending, firming is finished, and at this moment the outlet valve block 74 of slush pump 7 is
Open, entrance valve block 73 is to close, and at this moment reversal valve 100 is commutated, and the piston of soil suction oil cylinder 1 will be moved upwards, be inhaled
Soil, at this moment should have one outlet valve block 74 is first closed than relatively rapid action, entrance valve block 73 is opened again, because if entering
Mouth valve block 73 is first opened and exports the no closing of valve block 74, and the main pipeline of this slush pump 7 is logical, and mud can flow backwards,
That is the oil cylinder 741 of control outlet valve block 74 will be acted first, and the oil cylinder 731 of control entrance valve block 73 is acted after wanting, and is then kept out
The state that mouth valve block 74 is closed and entrance valve block 73 is opened, carries out soil suction.
Soil suction oil cylinder 1' and slush pump 7' is identical with soil suction oil cylinder 1 and the above-mentioned action of slush pump 7.
The content of the invention
The present invention provides a kind of pressure differential automatic switch, the purpose is to solve the shortcoming of prior art presence, makes several oil
The piston of cylinder can form Methodistic priority motion by pressure differential automatic switch.
The present invention provides a kind of rotation pump perforating piling machine hydraulic control system, and the purpose is to make two lists of rotation pump perforating piling machine
It will not be flow backwards to mud during mud pump work.
The technical solution adopted for the present invention to solve the technical problems is：
Pressure differential automatic switch, it is characterised in that：
With valve pocket, being arranged with valve pocket on a valve element, valve element has twice annular groove and forms two necks, and valve element is remained
Remaining part is divided in two ends and a middle part；The two ends of valve pocket respectively have hydraulic fluid port, and the middle part of valve pocket has two hydraulic fluid ports, valve pocket
Two hydraulic fluid ports at middle part are located on a radial section of valve pocket, have the little spring compressed and the big bullet compressed in valve pocket
Spring, little spring and big spring are located at the both sides of valve element, and contact is distinguished on valve pocket end and valve element in the two ends of little spring, big spring
Two ends distinguish contact on another end of valve pocket and valve element；The rigidity of little spring is less than big spring；One end of valve pocket
Hydraulic fluid port is connected with a hydraulic fluid port in the middle part of valve pocket, and the hydraulic fluid port of the other end of valve pocket is connected with another hydraulic fluid port in the middle part of valve pocket.
Revolve pump perforating piling machine hydraulic control system, it is characterised in that：
With a reversal valve, reversal valve has oil inlet pipe hydraulic fluid port, flowline hydraulic fluid port and two soil suction oil cylinder ports, oil inlet pipe
When hydraulic fluid port is connected with a soil suction oil cylinder port, flowline hydraulic fluid port and another soil suction oil cylinder port UNICOM；
Oil inlet pipe connects oil inlet pipe hydraulic fluid port, flowline connection flowline hydraulic fluid port；
Two unidirectional mud pump valves are installed in rotation pump perforating piling machine；
One unidirectional mud pump valve is provided with first entrance valve block oil cylinder and first outlet valve block oil cylinder, another unidirectional mud pump valve
Provided with second entrance valve block oil cylinder and second outlet valve block oil cylinder；
Above-mentioned first entrance valve block oil cylinder, first outlet valve block oil cylinder, second entrance valve block oil cylinder, second outlet valve block oil
Cylinder is divided into epicoele and cavity of resorption by piston respectively；
The poor automatic switch of first pressure with such as above-mentioned pressure differential automatic switch structure and the poor automatic switch of second pressure；
Two soil suction oil cylinder ports are respectively the first soil suction oil cylinder port and the second soil suction oil cylinder port；
The epicoele of first entrance valve block oil cylinder, the cavity of resorption of first outlet valve block oil cylinder, the cavity of resorption of second entrance valve block oil cylinder,
The epicoele of second outlet valve block oil cylinder is connected with the first soil suction oil cylinder port；
The epicoele of first outlet valve block oil cylinder, the epicoele of second entrance valve block oil cylinder with the poor automatic switch of first pressure
Corresponding to the hydraulic fluid port connection of little spring, first pressure difference automatic switch to correspond to the hydraulic fluid port of big spring and the second soil suction oil cylinder oily
Mouth connection；
The cavity of resorption of first entrance valve block oil cylinder, the cavity of resorption of second outlet valve block oil cylinder with the poor automatic switch of second pressure
Corresponding to the hydraulic fluid port connection of big spring, second pressure difference automatic switch to correspond to the hydraulic fluid port of little spring and the second soil suction oil cylinder oily
Mouth connection.
The present invention is advantageous in that：
The pressure differential automatic switch of the present invention utilizes big spring and the rigid difference of little spring, makes valve element towards big spring side
To with motion towards little spring direction both direction the time required to it is different, namely valve element causes valve pocket towards moving in both direction
Time needed for two hydraulic fluid ports connection of side wall is different, so as to realize control function.
The rotation pump perforating piling machine hydraulic control system of the present invention, using the combination of reversal valve and pressure differential automatic switch, leads
Two individual event mud pump valves are caused when converting the state of soil suction and firming, entrance valve block and outlet valve block have a shape simultaneously closed off
State, reconvert is to a state for closing an opening, so as to avoid mud from flowing back.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the unidirectional slush pump structure chart of prior art；
Fig. 2 is the spark soil suction drill bit and its neighbouring structure chart for revolving pump perforating piling machine；
Fig. 3 is two unidirectional slush pump structure charts；
Fig. 4 is one of state of hydraulic stroke automatic diverter valve that soil suction oil cylinder used in unidirectional slush pump is configured.
Fig. 5 is the two of the state for the hydraulic stroke automatic diverter valve that soil suction oil cylinder used in unidirectional slush pump is configured；
Fig. 6 is one of state of control system of soil suction oil cylinder of two unidirectional mud valves；
Fig. 7 is the two of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；
Fig. 8 is the three of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；
Fig. 9 is the four of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；
Figure 10 is pressure differential automatic switch structure figure；
Figure 11 is pressure differential automatic switch hydraulic fluid port connection diagram；
Figure 12 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
One；
Figure 13 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
One；
Figure 14 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Two；
Figure 15 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Two；
Figure 16 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Three；
Figure 17 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Three；
Figure 18 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Four；
Figure 19 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Four；
Figure 20 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Five；
Figure 21 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Five；
Figure 22 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Six；
Figure 23 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Six；
Figure 24 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Seven；
Figure 25 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Seven；
Figure 26 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Eight；
Figure 27 be two soil suction oil cylinders and control two slush pumps entrance valve block and outlet valve block oil cylinder state it
Eight.
Embodiment
D：The structure of pressure differential automatic switch
As shown in Figure 10, it is pressure differential automatic switch 4, it, which has, is arranged with a valve element 41, valve in valve pocket 40, valve pocket 40
There is the neck 413,414 of twice annular groove 411,412 and two minor diameters of formation, the remainder of valve element 41 is end on core 41
415th, 416 and middle part 417；The two ends connection hydraulic fluid port 42,43 of valve pocket 40, the middle part connection hydraulic fluid port 44,45 of valve pocket 40, valve pocket 40
Two hydraulic fluid ports 44,45 at middle part are located on a radial section of valve pocket 40, have the He of little spring 47 compressed in valve pocket 40
The big spring 48 compressed, one end contact of little spring 47 is in one end with hydraulic fluid port 42 of pressure differential automatic switch 4, little spring
47 other end contact is located at this side of end 415 valve element 41, and big spring 48 contact pressure differential automatic switch 4 has
One end of hydraulic fluid port 43, the other end contact of big spring 48 is located at this side of end 416 in valve element 41.When the hydraulic fluid port of hydraulic fluid port 42
When 43 oil pressure is identical, the closing of middle part 417 hydraulic fluid port 44,45.
The rigidity of little spring 47 is less than big spring 48, namely：When the pressure of hydraulic fluid port 42 is more than the pressure of hydraulic fluid port 43, pressure differential
During for △ F, valve element 41 moves right compression big spring 48, until annular groove 411 is connected namely hydraulic fluid port 44,45 phases with hydraulic fluid port 44,45
Intercommunicated, required time is T；When the pressure of hydraulic fluid port 43 is more than the pressure of hydraulic fluid port 42, when pressure differential is △ F, valve element 41 is transported to the left
Spring 47 is reduced in dynamic pressure, and until annular groove 412 is connected namely hydraulic fluid port 44,45 is interconnected with hydraulic fluid port 44,45, required time is T'；
Then T>T'.That is, same power, compression big spring 48 is relatively difficult, compression little spring 47 is easier, and compression big spring 48 is produced
It is long apart from required time that a raw deformation produces same deformation apart from required time than compression little spring 47.
In use, such as Figure 11, hydraulic fluid port 44,45 be connected with external pipe respectively, and hydraulic fluid port 42 is connected with hydraulic fluid port 44, hydraulic fluid port 43 and
Hydraulic fluid port 45 is connected.
E：The entrance valve block and outlet valve structure figure of two slush pumps of pressure differential automatic switch control
It is two soil suction oil cylinders as shown in Figure 12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27
With the eight kinds of states of the entrance valve block of two slush pumps of control and the oil cylinder of outlet valve block in a cyclic process.
The following is the corresponding relation with technical scheme and the part name of claim：
Reversal valve 100 has oil inlet pipe hydraulic fluid port 101, flowline hydraulic fluid port 102, the first soil suction oil cylinder port 103 and the second soil suction
Oil cylinder port 104.
First entrance valve block oil cylinder 731 and first outlet valve block oil cylinder 741, second entrance valve block oil cylinder 731' and second go out
Mouth valve block oil cylinder 741'；
First pressure difference automatic switch 4 and the poor automatic switch 4' of second pressure；
The hydraulic fluid port 42,44 corresponding to little spring 47 of first pressure difference automatic switch 4, first pressure difference automatic switch 4
Corresponding to the hydraulic fluid port 43,45 of big spring 48；
Second pressure difference automatic switch 4' hydraulic fluid port 43', 45' corresponding to big spring 48', second pressure difference automatic switch
4' hydraulic fluid port 42', 44' corresponding to little spring 47'.
Wherein, in each state, two sets of oil inlet pipes 221 and flowline 222 are identicals, and two reversal valves 100 can be adopted
Use same reversal valve, it would however also be possible to employ the reversal valve of two Complete Synchronizations, in order to clearly show that, what it is two soil suction oil cylinders is
The system of the entrance valve block and outlet valve block of system and two slush pumps is separately showed, two of which soil suction cylinder system be exactly Fig. 6,
7th, the soil suction cylinder system shown in 8,9.
When soil suction oil cylinder 1 piston movement to it is most upper when, soil suction is finished, at this moment the entrance valve block 73 of slush pump 7 be open
, outlet valve block 74 is to close, and at this moment reversal valve 100 is commutated, and the piston of soil suction oil cylinder 1 will be moved downward, and carries out firming, this
When should have one than it is relatively rapid action entrance valve block 73 is first closed, outlet valve block 74 open again, because if outlet valve
Piece 74 is first opened and entrance valve block 73 is not closed, and the main pipeline of this slush pump 7 is logical, and mud can flow backwards, namely control
The oil cylinder 731 of entrance valve block 73 processed will be acted first, and the oil cylinder 741 of control outlet valve block 74 is acted after wanting, and then keeps inlet valve
The state of the opening of valve block 74 is closed and exported to piece 73, carries out firming；
Conversely, when the piston movement of soil suction oil cylinder 1 is to when most descending, firming is finished, and at this moment the outlet valve block 74 of slush pump 7 is
Open, entrance valve block 73 is to close, and at this moment reversal valve 100 is commutated, and the piston of soil suction oil cylinder 1 will be moved upwards, be inhaled
Soil, at this moment should have one outlet valve block 74 is first closed than relatively rapid action, entrance valve block 73 is opened again, because if entering
Mouth valve block 73 is first opened and exports the no closing of valve block 74, and the main pipeline of this slush pump 7 is logical, and mud can flow backwards,
That is the oil cylinder 741 of control outlet valve block 74 will be acted first, and the oil cylinder 731 of control entrance valve block 73 is acted after wanting, and is then kept out
The state that mouth valve block 74 is closed and entrance valve block 73 is opened, carries out soil suction.
Soil suction oil cylinder 1' and slush pump 7' is identical with soil suction oil cylinder 1 and the above-mentioned action of slush pump 7.
As shown in Figure 12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27：
Figure medial end portions 75 belong to slush pump 7, for connecting soil suction oil cylinder 1；End 75' belongs to slush pump 7', for connecting
Soil suction oil cylinder 1 ".
Oil cylinder 731 is divided into epicoele 7311 and cavity of resorption 7312 by piston 7310；When piston 7310 rises, slush pump 7
Entrance valve block 73 is opened, and until piston 7310 rises to extreme position, the entrance valve block 73 of slush pump 7 is opened completely；Work as piston
During 7310 decline, the entrance valve block 73 of slush pump 7 is closed, until piston 7310 drops to extreme position, the inlet valve of slush pump 7
Piece 73 is completely closed.
Oil cylinder 741 is divided into epicoele 7411 and cavity of resorption 7412 by piston 7410；When piston 7410 rises, slush pump 7
Outlet valve block 74 is opened, and until piston 7410 rises to extreme position, the outlet valve block 74 of slush pump 7 is opened completely；Work as piston
During 7410 decline, the outlet valve block 74 of slush pump 7 is closed, until piston 7410 drops to extreme position, the outlet valve of slush pump 7
Piece 74 is completely closed.
Oil cylinder 731' is divided into epicoele 7311' and cavity of resorption 7312' by piston 7310'；When piston 7310' rises, mud
Pump 7' entrance valve block 73' is opened, and until piston 7310' rises to extreme position, slush pump 7' entrance valve block 73' is beaten completely
Open；When piston 7310' declines, slush pump 7' entrance valve block 73' is closed, until piston 7310' drops to extreme position, mud
Stock pump 7' entrance valve block 73' is completely closed.
Oil cylinder 741' is divided into epicoele 7411' and cavity of resorption 7412' by piston 7410'；When piston 7410' rises, mud
Pump 7' outlet valve block 74' is opened, and until piston 7410' rises to extreme position, slush pump 7' outlet valve block 74' is beaten completely
Open；When piston 7410' declines, the outlet valve block 74' of slush pump 7 is closed, until piston 7410' drops to extreme position, mud
Stock pump 7' outlet valve block 74' is completely closed.
The hydraulic fluid port 103 of reversal valve 100 is connected with the epicoele 7311 of oil cylinder 731, is connected with the cavity of resorption 7412 of oil cylinder 741, with
Oil cylinder 731' cavity of resorption 7312' connections, are connected with oil cylinder 741' epicoele 7411'.
The hydraulic fluid port 104 of reversal valve 100 is connected with the hydraulic fluid port 45 of the poor automatic switch 4 of first pressure, and first pressure difference is opened automatically
The hydraulic fluid port 44 for closing 4 is connected with the epicoele 7411 of oil cylinder 741, and is connected with oil cylinder 731' epicoele 7311'.First pressure difference is certainly
The hydraulic fluid port 45 of dynamic switch 4 is connected with hydraulic fluid port 43, and hydraulic fluid port 42 is connected with hydraulic fluid port 44.
Hydraulic fluid port 44' of the hydraulic fluid port 104 of reversal valve 100 also with the poor automatic switch 4' of second pressure is connected, and second pressure difference is certainly
Dynamic switch 4' hydraulic fluid port 45' is connected with the cavity of resorption 7312 of oil cylinder 731, and is connected with oil cylinder 741' cavity of resorption 7412'.Second pressure
Power difference automatic switch 4' hydraulic fluid port 45' is connected with hydraulic fluid port 43', and hydraulic fluid port 42' is connected with hydraulic fluid port 44'.
First pressure difference automatic switch 4 is identical with the poor automatic switch 4' of second pressure.
Figure 12,13 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the first state：
At this moment, the firming of slush pump 7 is just completed, and the piston 12 of soil suction oil cylinder 1 runs to lower limit, the piston of oil cylinder 731
7310 run to lower limit, and entrance valve block 73 is closed, and the piston 7410 of oil cylinder 741 runs to the upper limit, and outlet valve block 74 is opened.
At this moment, slush pump 7' soil suction is just completed, and soil suction oil cylinder 1' piston 12' runs to the upper limit, oil cylinder 731''s
Piston 7310' runs to the upper limit, and entrance valve block 73' is opened, and oil cylinder 741' piston 7410' runs to lower limit, outlet valve block 74'
Close.
At this moment, the hydraulic fluid port 101 of reversal valve 100 is connected with hydraulic fluid port 103, and hydraulic fluid port 102 is connected with hydraulic fluid port 104.
The closing of middle part 417 hydraulic fluid port 45,44 of first pressure difference automatic switch 4.
Second pressure difference automatic switch 4' middle part 417' closing hydraulic fluid ports 45', 44'.
Figure 14,15 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' second of state：
Reach after Figure 12,13 state, because hydraulic pressure automatic change valve 3' is activated, so reversal valve 100 commutates, hydraulic fluid port
101 are connected with hydraulic fluid port 104, and hydraulic fluid port 102 is connected with hydraulic fluid port 103.
High pressure liquid force feed enters from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 104, and it is automatic to enter first pressure difference from hydraulic fluid port 43
Switch 4 and compress little spring 47, while entering second pressure difference automatic switch 4' from hydraulic fluid port 42' and compressing big spring 48'.
Because under same pressure, the compression easier than big spring 48' of little spring 47, the deformation of little spring 47 is fast.
So, annular groove 412 is first connected with hydraulic fluid port 45, hydraulic fluid port 44.
Hydraulic oil is from hydraulic fluid port 45, annular groove 412, hydraulic fluid port 44, epicoele 7411 subsequently into oil cylinder 741, while into oil cylinder
731' epicoele 7311'.
Hydraulic oil makes the piston 7410 of oil cylinder 741 drop to lower limit, namely the outlet valve block 74 of slush pump 7 is closed, oil cylinder
731' piston 7310' drops to lower limit, namely slush pump 7' entrance valve block 73' is closed.
And now big spring 48' deformation is slow, the piston 7310 of oil cylinder 731 is motionless, namely slush pump 7 outlet valve block 74
Close but entrance valve block 73 is not opened also, oil cylinder 741' piston 7410' is motionless, namely slush pump 7' entrance valve block
73' is closed but outlet valve block 74' is not opened also.
Figure 16,17 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the third state：
After second of state is reached, because the piston 7410 of oil cylinder 741 drops to lower limit, oil cylinder 731' piston
7310' drops to lower limit, so the oil pressure in oil cylinder 741, oil cylinder 731' is constantly raised, namely the oil pressure of hydraulic fluid port 42 constantly rises
Height, until this oil pressure height contracts to by big spring 48 to back pressure, hydraulic fluid port is closed at the middle part 417 of the poor automatic switch 4 of first pressure
45th, 44 when, the oil pressure of hydraulic fluid port 43 and hydraulic fluid port 42 reaches balance.
And now, by compression in place, annular groove 411' connects the slower big spring 48' of deformation with hydraulic fluid port 44', hydraulic fluid port 45'
It is logical.
Hydraulic oil is from hydraulic fluid port 44', annular groove 411', hydraulic fluid port 45', cavity of resorption 7312 subsequently into oil cylinder 731, while entering oil
Cylinder 741' cavity of resorption 7412'.
Hydraulic oil makes the piston 7310 of oil cylinder 731 rise to the upper limit, namely the entrance valve block 73 of slush pump 7 is opened, oil cylinder
741' piston 7410' rises to the upper limit, namely slush pump 7' outlet valve block 74' is opened.
Figure 18,19 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the 4th kind of state：
Reach after the third state, because the piston 7310 of oil cylinder 731 rises to the upper limit, oil cylinder 741' piston 7410'
The upper limit is risen to, so the oil pressure in oil cylinder 731, oil cylinder 741' is constantly raised, namely hydraulic fluid port 43' oil pressure is constantly raised, directly
Contracted to this oil pressure height to by little spring 47' to back pressure, hydraulic fluid port is closed in the poor automatic switch 4' of second pressure middle part 417'
When 45', 44', hydraulic fluid port 43' and hydraulic fluid port 42' oil pressure reach balance.
Under 4th kind of state, the entrance valve block 73 of slush pump 7 is opened, and outlet valve block 74 is closed, slush pump 7' inlet valve
Piece 73' is closed, and outlet valve block 74' is opened.
Now, the piston 12 of soil suction oil cylinder 1 rises, and slush pump 7 carries out soil suction, and soil suction oil cylinder 1' piston 12' declines, mud
Stock pump 7' carries out firming.
During above-mentioned soil suction, firming, first pressure difference automatic switch 4, the poor automatic switch 4' of second pressure, oil cylinder
731st, oil cylinder 741, oil cylinder 731', oil cylinder 741' state are always maintained at.
Figure 20,21 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the 5th kind of state：
At this moment, the soil suction of slush pump 7 is just completed, and the piston 12 of soil suction oil cylinder 1 runs to the upper limit, the piston of oil cylinder 731
7310 run to the upper limit, and entrance valve block 73 is opened, and the piston 7410 of oil cylinder 741 runs to lower limit, and outlet valve block 74 is closed.
At this moment, slush pump 7' firming is just completed, and soil suction oil cylinder 1' piston 12' runs to lower limit, oil cylinder 731''s
Piston 7310' runs to lower limit, and entrance valve block 73' is closed, and oil cylinder 741' piston 7410' runs to the upper limit, outlet valve block 74'
Open.
At this moment, the hydraulic fluid port 101 of reversal valve 100 is connected with hydraulic fluid port 104, and hydraulic fluid port 102 is connected with hydraulic fluid port 103.
The closing of middle part 417 hydraulic fluid port 45,44 of first pressure difference automatic switch 4.
Second pressure difference automatic switch 4' middle part 417' closing hydraulic fluid ports 45', 44'.
Figure 22,23 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the 6th kind of state：
Reach after Figure 20,21 state, because hydraulic pressure automatic change valve 3 is activated, so reversal valve 100 commutates, hydraulic fluid port
101 are connected with hydraulic fluid port 103, and hydraulic fluid port 102 is connected with hydraulic fluid port 104.
High pressure liquid force feed enters from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 103, into the epicoele 7311 and oil cylinder of oil cylinder 731
741' epicoele 7411', the cavity of resorption 7312 of such oil cylinder 731 and oil cylinder 741' cavity of resorption 7412' oil are under pressure, and the pressure
Power is delivered to hydraulic fluid port 43', and enters the poor automatic switch 4' of second pressure, and compresses little spring 47'.
Meanwhile, high pressure liquid force feed enters from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 103, into the cavity of resorption 7412 of oil cylinder 741
With oil cylinder 731' cavity of resorption 7312', so, the epicoele 7411 of oil cylinder 741 and oil cylinder 731' epicoele 7311' oil are pressed
Power, and the pressure transmission is to hydraulic fluid port 42, and enter the poor automatic switch 4 of first pressure, and compress big spring 48.
Because under same pressure, little spring 47' compressions easier than big spring 48, little spring 47' deformation is fast.
So, annular groove 412' is first connected with hydraulic fluid port 45', hydraulic fluid port 44'.
Hydraulic oil enters the epicoele 7311 of oil cylinder 731, and the piston 7310 of oil cylinder 731 is dropped under lower limit, oil cylinder 731
The oil of chamber 7312 flows away from hydraulic fluid port 45', annular groove 412', hydraulic fluid port 44', hydraulic fluid port 104, hydraulic fluid port 102, flowline 222.Namely slush pump
7 entrance valve block 73 is closed.
Hydraulic oil enters oil cylinder 741' epicoele 7411', and oil cylinder 741' piston 7410' is dropped into lower limit, oil cylinder
741' cavity of resorption 7412' oil flows away from hydraulic fluid port 45', annular groove 412', hydraulic fluid port 44', hydraulic fluid port 104, hydraulic fluid port 102, flowline 222.
Namely slush pump 7' outlet valve block 74' is closed.
And the now deformation of big spring 48 is slow, the piston 7410 of oil cylinder 741 is motionless, namely slush pump 7 entrance valve block 73
Close but outlet valve block 74 is not opened also, oil cylinder 731' piston 7310' is motionless, namely slush pump 7' outlet valve block
74' is closed but entrance valve block 73' is not opened also.
Figure 24,25 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the 7th kind of state：
Reach after the 6th kind of state, due to the oil of the cavity of resorption 7312 of oil cylinder 731, and oil cylinder 741' cavity of resorption 7412'
Oil is lost to the limit, causes hydraulic fluid port 43' oil pressure to decline, and is replied until this oil pressure drops to little spring 47', in second pressure
During poor automatic switch 4' middle part 417' closing hydraulic fluid port 45', 44', hydraulic fluid port 42' and hydraulic fluid port 43' oil pressure reach balance.
And now, by compression in place, annular groove 411 is connected the slower big spring 48 of deformation with hydraulic fluid port 44, hydraulic fluid port 45.
Hydraulic oil enters the cavity of resorption 7412 of oil cylinder 741, and the piston 7410 of oil cylinder 741 risen into the upper limit, oil cylinder 741 it is upper
The oil of chamber 7411 flows away from hydraulic fluid port 44, annular groove 411, hydraulic fluid port 45, hydraulic fluid port 104, hydraulic fluid port 102, flowline 222.Namely slush pump 7
Outlet valve block 74 is opened.
Hydraulic oil enters oil cylinder 731' cavity of resorption 7312', and oil cylinder 731' piston 7310' is risen into the upper limit, oil cylinder
731' epicoele 7311' oil flows away from hydraulic fluid port 44, annular groove 411, hydraulic fluid port 45, hydraulic fluid port 104, hydraulic fluid port 102, flowline 222.Namely
Slush pump 7' entrance valve block 73' is opened.
Figure 26,27 are reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the poor automatic switch 4 of first pressure, second pressure
Poor automatic switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the 8th kind of state：
Reach after the 7th kind of state, due to the oil of the epicoele 7411 of oil cylinder 741, and oil cylinder 731' epicoele 7311'
Oil is lost to the limit, causes hydraulic fluid port 42' oil pressure to decline, and is replied until this oil pressure drops to big spring 48, in first pressure
During closing hydraulic fluid port 45,44 of middle part 417 of poor automatic switch 4, the oil pressure of hydraulic fluid port 42 and hydraulic fluid port 43 reaches balance.
Under 8th kind of state, the entrance valve block 73 of slush pump 7 is closed, and outlet valve block 74 is opened, slush pump 7' inlet valve
Piece 73' is opened, and outlet valve block 74' is closed.
Now, the piston 12 of soil suction oil cylinder 1 declines, and slush pump 7 carries out firming, and soil suction oil cylinder 1' piston 12' rises, mud
Stock pump 7' carries out rare earth.
During above-mentioned soil suction, firming, first pressure difference automatic switch 4, the poor automatic switch 4' of second pressure, oil cylinder
731st, oil cylinder 741, oil cylinder 731', oil cylinder 741' state are always maintained at.
Finally, reach that Figure 12, the reversal valve 100 shown in 13, soil suction oil cylinder 1, soil suction oil cylinder 1', first pressure difference are opened automatically
The poor automatic switch 4' of 4, second pressure, oil cylinder 731, oil cylinder 741, oil cylinder 731', oil cylinder 741' the first state are closed, one is completed
Individual circulation.
Claims (2)
1. pressure differential automatic switch, it is characterised in that：
With valve pocket, being arranged with valve pocket on a valve element, valve element has twice annular groove and forms two necks, valve element remainder
It is divided in two ends and a middle part；The two ends of valve pocket respectively have hydraulic fluid port, and the middle part of valve pocket has two hydraulic fluid ports, the middle part of valve pocket
Two hydraulic fluid ports be located on a radial section of valve pocket, there is in valve pocket the little spring compressed and the big spring compressed,
Little spring and big spring are located at the both sides of valve element, and contact is distinguished on valve pocket end and valve element in the two ends of little spring, big spring
Contact is distinguished on another end of valve pocket and valve element in two ends；The rigidity of little spring is less than big spring；The oil of one end of valve pocket
Mouth is connected with a hydraulic fluid port in the middle part of valve pocket, and the hydraulic fluid port of the other end of valve pocket is connected with another hydraulic fluid port in the middle part of valve pocket.
2. revolve pump perforating piling machine hydraulic control system, it is characterised in that：
With a reversal valve, reversal valve has oil inlet pipe hydraulic fluid port, flowline hydraulic fluid port and two soil suction oil cylinder ports, oil inlet pipe hydraulic fluid port
When being connected with a soil suction oil cylinder port, flowline hydraulic fluid port and another soil suction oil cylinder port UNICOM；
Oil inlet pipe connects oil inlet pipe hydraulic fluid port, flowline connection flowline hydraulic fluid port；
Two unidirectional mud pump valves are installed in rotation pump perforating piling machine；
One unidirectional mud pump valve is provided with first entrance valve block oil cylinder and first outlet valve block oil cylinder, and another unidirectional mud pump valve is provided with
Second entrance valve block oil cylinder and second outlet valve block oil cylinder；
Above-mentioned first entrance valve block oil cylinder, first outlet valve block oil cylinder, second entrance valve block oil cylinder, second outlet valve block oil cylinder point
Epicoele and cavity of resorption are not divided into by piston；
The poor automatic switch of first pressure with pressure differential automatic switch structure as claimed in claim 1 and second pressure difference are certainly
Dynamic switch；
Two soil suction oil cylinder ports are respectively the first soil suction oil cylinder port and the second soil suction oil cylinder port；
The epicoele of first entrance valve block oil cylinder, the cavity of resorption of first outlet valve block oil cylinder, the cavity of resorption of second entrance valve block oil cylinder, second
The epicoele of outlet valve block oil cylinder is connected with the first soil suction oil cylinder port；
The epicoele of first outlet valve block oil cylinder, the epicoele of second entrance valve block oil cylinder are corresponding with the poor automatic switch of first pressure
In little spring hydraulic fluid port connect, first pressure difference automatic switch correspond to the hydraulic fluid port of big spring and the second soil suction oil cylinder port company
It is logical；
The cavity of resorption of first entrance valve block oil cylinder, the cavity of resorption of second outlet valve block oil cylinder are corresponding with the poor automatic switch of second pressure
In big spring hydraulic fluid port connect, second pressure difference automatic switch correspond to the hydraulic fluid port of little spring and the second soil suction oil cylinder port company
It is logical.
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| CN201610011479.8A CN105605012B (en) | 2016-01-08 | 2016-01-08 | Pressure differential automatic switch and rotation pump perforating piling machine hydraulic control system |
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| CN201610011479.8A CN105605012B (en) | 2016-01-08 | 2016-01-08 | Pressure differential automatic switch and rotation pump perforating piling machine hydraulic control system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060520A (en) * | 1990-10-06 | 1992-04-22 | 邓永林 | Differential pressure type expansion valve |
| CN1061837A (en) * | 1991-06-12 | 1992-06-10 | 陆云飞 | Feedback-type inertia controller |
| CN2212118Y (en) * | 1994-10-28 | 1995-11-08 | 李敬辉 | Folding angle door safety valve of railway vehicles |
| CN2596101Y (en) * | 2002-12-27 | 2003-12-31 | 上海汇众汽车制造有限公司 | Electrorheologic liquid adjustable shock adsorber |
| KR20100040135A (en) * | 2008-10-09 | 2010-04-19 | (주)세영하이텍 | Differential pressure control valve |
| CN103133447A (en) * | 2013-01-26 | 2013-06-05 | 梁富春 | Differential pressure type sliding valve |
| CN205479492U (en) * | 2016-01-08 | 2016-08-17 | 洪子云 | Pressure differential automatic switch reaches and revolves pump hole -forming pile machine hydraulic control system |
-
2016
- 2016-01-08 CN CN201610011479.8A patent/CN105605012B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060520A (en) * | 1990-10-06 | 1992-04-22 | 邓永林 | Differential pressure type expansion valve |
| CN1061837A (en) * | 1991-06-12 | 1992-06-10 | 陆云飞 | Feedback-type inertia controller |
| CN2212118Y (en) * | 1994-10-28 | 1995-11-08 | 李敬辉 | Folding angle door safety valve of railway vehicles |
| CN2596101Y (en) * | 2002-12-27 | 2003-12-31 | 上海汇众汽车制造有限公司 | Electrorheologic liquid adjustable shock adsorber |
| KR20100040135A (en) * | 2008-10-09 | 2010-04-19 | (주)세영하이텍 | Differential pressure control valve |
| CN103133447A (en) * | 2013-01-26 | 2013-06-05 | 梁富春 | Differential pressure type sliding valve |
| CN205479492U (en) * | 2016-01-08 | 2016-08-17 | 洪子云 | Pressure differential automatic switch reaches and revolves pump hole -forming pile machine hydraulic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105605012A (en) | 2016-05-25 |
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