CN205478616U - Hydraulic pressure stroke self -commutation valve reaches and revolves pump hole -forming pile machine hydraulic control system - Google Patents

Abstract

The utility model provides a hydraulic pressure stroke self -commutation valve, its characterized in that: two tip at the valve pocket do not are equipped with case end entrance and spring end entrance, and the middle part of valve pocket is equipped with the export, and the movably cover of inner wall of valve pocket fit in valve pocket is equipped with the case, the tip having the case end entrance is supported on the one end top of spring, and other end top is supported on the case, have a passageway UNICOM case towards the terminal surface of case end entrance and the surface of case lateral wall. The utility model provides a revolve pump hole -forming pile machine hydraulic control system. The utility model discloses a hydraulic pressure stroke self -commutation valve can be greater than when applying in the oil pressure of spring end entrance applying in the oil pressure of case end entrance, the spring compressed, and moving spool valve makes oil can follow the export and flows, realizes control function. The utility model discloses a two one -way mud pump valves action in turn of pump hole -forming pile machine soon can be made, suction mud efficiency is improved.

Description

Hydraulic stroke automatic diverter valve and rotation pump perforating piling machine hydraulic control system

Technical field

This utility model belongs to hydraulic component, particularly relates to the reversal valve that a kind of hydraulic system uses.

Background technology

In the hydraulic control system that hydraulic test is used, sometimes need after oil cylinder piston Overstroke automatically Change piston movement direction, so needing hydraulic stroke automatically to switch, namely hydraulic stroke automatic diverter valve.

" the rotation pump perforating piling machine " of Patent No. 201110116411.3 provides a kind of rotation pump perforating piling machine, Wherein there is unidirectional mud pump valve 7 ", as it is shown in figure 1, unidirectional mud pump valve 7 " there are two in valve body and be hinged on valve Internal check valve sheet 73 ", 74 ", unidirectional mud pump valve 7 " entrance 71 " converge and connect and set soil suction pipeline 6, The outlet 72 of unidirectional mud pump valve 7 " connect and set mud tube 60, unidirectional mud pump valve 7 " a hydraulic interface 75 " with Jin Gang bores high-pressure hydraulic power soil suction compression pump 2 and connects.

Jin Gang bores high-pressure hydraulic power soil suction compression pump 2 and is preferably used the oil cylinder that can be described as soil suction oil cylinder, soil suction oil The reciprocating motion of cylinder just can be as described below at unidirectional mud pump valve 7 " produce malleation and negative pressure.

As in figure 2 it is shown, this rotation pump perforating piling machine to utilize diamond soil suction drill bit 5 that sandstone earth is rubbed into mud soft Soil, meanwhile, ground active force pump drives gold steel to bore high pressure liquid by the high pressure liquid force feed that high-pressure oil pipe 22 provides Pressure power soil suction compression pump 2 produces negative pressure, the at this moment check valve sheet in direction shown in Fig. 1 in making unidirectional mud pump valve 7 73 " passage of its correspondence of Unscrew counterclockwise, check valve sheet 74 " its correspondence of rotary closing is logical counterclockwise Road, because of unidirectional mud pump valve 7 " in be negative pressure thus mud weak soil is sucked by each soil suction pipeline 6, by entrance 71 " It is inhaled into unidirectional mud pump valve 7 " in.

Gold steel is driven to bore high-pressure and hydraulic by ground active force pump by the high pressure liquid force feed that high-pressure oil pipe 22 provides again Power soil suction compression pump 2 makes unidirectional mud pump valve 7 " interior generation malleation, the at this moment check valve sheet in direction shown in Fig. 1 The passage of its correspondence of closedown that 73 " turns clockwise, check valve sheet 74 " turn clockwise and open the logical of its correspondence Road, because of unidirectional mud pump valve 7 " in be malleation thus mud weak soil is forced out outlet 72 ", export from mud tube 60 Mud pit is led to behind ground.

Above-mentioned unidirectional mud pump valve 7 " check configuration arrange can ensure that mud do not reflux downwards because of gravity and Only can carry the most earthward.

Above-mentioned unidirectional mud pump valve in use, due to check valve sheet 73 ", 74 " be hinged in valve body, Drive check valve sheet 73 by the malleation in valve body and negative pressure completely ", 74 " automatically rotate so that its correspondence Passage is turned on and off, so, during use, dense due to mud, it is impossible to close the most in time, So probably due to the obstruction generation leakage situation of silt, such as, when check valve sheet 73 " to rotate clockwise Close entrance 71 " time, silt may be in check valve sheet 73 " pin joint at affect its rotate, it is also possible to Check valve sheet 73 " withstand check valve sheet 73 at the closing point of valve body " so that it is being not closed completely, mud is from seam At gap out.For check valve sheet 74 " it is likely to that this situation occurs.

During it addition, local bottom slurry pressure increases suddenly, normal pressure is not enough so that check valve sheet 73 " Close, check valve sheet 73 at this time will occur " situation about cannot close.

The rotation pump unidirectional mud pump valve of perforating piling machine only one of which 7 of said structure " enter because its action is slurry-sucking Unidirectional mud pump valve 7 ", pressure mud goes out unidirectional mud pump valve 7 ", so mud is that to be forced into mud tube the most defeated at interval Arriving ground, whole process has interval, have impact on the efficiency of slurry-sucking.

In order to improve the efficiency of the slurry-sucking of rotation pump perforating piling machine, two can be installed in rotation pump perforating piling machine Individual event mud pump valve.

Such as:

A: unidirectional mud pump structure:

As it is shown on figure 3, unidirectional mud pump valve 7 has valve body, valve body includes main pipeline, the arm in the middle part of main pipeline Pipeline joint 70 connects branch pipe(tube) 750, and the upper end of main pipeline is for outlet 72 and is connected with mud tube 60, main pipeline Lower end be entrance 71 and be connected with soil suction pipeline 6, the end 75 of branch pipe(tube) 750 is hydraulic interface and soil suction pressure Power pump 2 connects.

Main pipeline is made up of entrance 710 and outlet section 720, main pipeline entrance 71 and branch pipe(tube) interface 70 it Between position be entrance 710, main pipeline outlet 72 and branch pipe(tube) interface 70 between position be outlet section 720, namely branch pipe(tube) interface 70 is boundary.In the present embodiment, entrance 710 is coaxial with branch pipe(tube) 750, Outlet section 720 is stretched out to the side of entrance 710 by branch pipe(tube) interface 70 position, and outlet section 720 is by one Arch section and straight-tube portion are constituted.

Entrance 710 is provided with an entrance valve block 73, and entrance valve block 73 is connected to the piston of an oil cylinder 731 The end of bar 732, the axis of the entrance 710 of the corresponding position of entrance valve block 73 is vertical, this piston rod 732 Driver Entry valve block 73 moves back and forth, and entrance valve block 73 can completely close or open entrance 710.

Outlet section 720 is provided with an outlet valve block 74, and outlet valve block 74 is connected to the piston of an oil cylinder 741 The end of bar 742, the tangent line of the axis of the outlet section 720 of the outlet corresponding position of valve block 74 is vertical, and this is lived Stopper rod 742 drives outlet valve block 74 to move back and forth, and outlet valve block 74 can completely close or open outlet section 720.

Above-mentioned oil cylinder 731,741 all connects and is set to hydraulic control system 700, thus is hydraulically controlled system 700 and controls System can operate in order.

Time actually used, it is assumed that original state is that entrance valve block 73 is closed, outlet valve block 74 is opened, then connect down Come:

Such as the rotation pump perforating piling machine in Fig. 2, to utilize diamond soil suction drill bit 5 that sandstone earth is rubbed into mud soft Soil, meanwhile, ground active force pump drives gold steel to bore high pressure liquid by the high pressure liquid force feed that high-pressure oil pipe 22 provides Pressure power soil suction compression pump 2 produces negative pressure and (or uses the oil cylinder that can be described as soil suction oil cylinder in making unidirectional mud pump valve 7 Motion produces negative pressure, and the lever of soil suction oil cylinder moves upward, and drives the piston upwards of its lever end, Between outlet valve block 74 and entrance valve block 73 in unidirectional mud pump valve 7, the space in space and branch pipe(tube) 750 increases Greatly, produce negative pressure, be identical with the effect using gold steel to bore high-pressure hydraulic power soil suction compression pump 2), liquid Pressure control system 700 controls oil cylinder 741 and oil cylinder 731, makes outlet valve block 74 first close, and entrance valve block 73 is beaten again Opening, due to suction function, each soil suction pipeline 6 sucks mud weak soil, is inhaled into unidirectional mud pump valve by entrance 71 Space in space and branch pipe(tube) 750 between outlet valve block 74 and entrance valve block 73 in 7.

Then hydraulic control system 700 controls oil cylinder 731 and oil cylinder 741, and entrance valve block 73 is first closed, outlet valve Sheet 74 is opened again, then is driven gold steel to bore by ground active force pump by the high pressure liquid force feed that high-pressure oil pipe 22 provides High-pressure hydraulic power soil suction compression pump 2 produces malleation and (or uses and can be described as soil suction oil cylinder in making unidirectional mud pump valve 7 Cylinder movement produce malleation, the lever of soil suction oil cylinder moves downward, and the piston driving its lever end is downward Motion, the sky in space and branch pipe(tube) 750 between outlet valve block 74 and the entrance valve block 73 in unidirectional mud pump valve 7 Between reduce, produce malleation, with use gold steel bore high-pressure hydraulic power soil suction compression pump 2 effect be identical), Because being malleation in unidirectional mud pump valve 7, thus between outlet valve block 74 and the entrance valve block 73 in unidirectional mud pump valve 7 The mud weak soil that space in space and branch pipe(tube) 750 is housed is forced out outlet 72, exports from mud tube 60 Mud pit is led to behind ground.

Outlet valve block 74 and entrance valve block 73 are by hydraulic system force switch, and switch is reliable, does not produce leakage existing As, it is to avoid mud flows backwards.

Unidirectional mud pump valve 7 is used for revolving pump perforating piling machine, former unidirectional mud pump valve 7 in fig. 2 " position, side by side Being provided with two unidirectional slush pumps 7,7 ', two unidirectional slush pumps 7,7 ' all connect soil suction pipeline 6 and mud Pipe 60.

Unidirectional slush pump 7 connects gold steel and bores high-pressure hydraulic power soil suction compression pump 2, and unidirectional slush pump 7 connects gold steel Bore high-pressure hydraulic 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.

Two unidirectional slush pumps 7,7 ' one of them when carrying out the action sucking mud, another extrudes The action of mud, vice versa.

Above actuation cycle, two unidirectional slush pumps 7,7 ' alternation, it is possible to incessantly by mud Extract out.

Hydraulic control system 700 can be with the circuit control system being single-chip microcomputer form.

If it is desired that use mechanical type hydraulic control system, it is necessary to hydraulic stroke automatic diverter valve.

Following use reversal valve, hydraulic stroke automatic diverter valve and pressure differential described in B, C, D, E part is certainly Dynamic switch combination forms control system.

Utility model content

This utility model provides a kind of hydraulic stroke automatic diverter valve, its objective is to solve lacking of prior art existence Point, the oil cylinder making hydraulic system can the automatic reverse when arriving stroke.

This utility model also provides for a kind of rotation pump perforating piling machine hydraulic control system, its objective is to make rotation pump perforating piling machine Two unidirectional mud pump valve actions in turn, improve pumping slurries efficiency.

This utility model solves its technical problem and be the technical scheme is that

Hydraulic stroke automatic diverter valve, it is characterised in that: it is respectively equipped with spool end in two ends of valve pocket and enters Mouth and spring terminal entrance, the middle part of valve pocket is provided with outlet, and the inwall coordinating valve pocket in valve pocket is the most sheathed There is spool；

One end contact of spring is in the end with spool end entrance, and other end contact is on spool；

There is the end face towards spool end entrance of a passage UNICOM spool and the outer surface of spool sidewall.

There is on spool the cervical region that annular groove is formed, described channel connection spool towards spool end entrance End face and the outer surface of cervical region.

Described valve pocket is cylindrical.

Rotation pump perforating piling machine hydraulic control system, it is characterised in that:

Having a reversal valve, reversal valve has oil inlet pipe hydraulic fluid port, flowline hydraulic fluid port and two soil suction oil cylinder ports, When oil inlet pipe hydraulic fluid port and a soil suction oil cylinder port connection, flowline hydraulic fluid port joins with another soil suction oil cylinder port Logical；

Reversal valve also has two to control mouth；

Oil inlet pipe connects oil inlet pipe hydraulic fluid port, and flowline connects flowline hydraulic fluid port；

Being provided with two unidirectional mud pump valves in rotation pump perforating piling machine, each unidirectional mud pump valve correspondence is provided with one Soil suction oil cylinder, each soil suction oil cylinder one hydraulic stroke reversal valve as above of configuration；

Each soil suction oil cylinder is divided into epicoele and cavity of resorption by piston；

Epicoele connects with a soil suction oil cylinder port of reversal valve；

Epicoele has two oil pipes spool end entrance and spring terminal entrance respectively with hydraulic stroke automatic diverter valve to connect Logical；The oil pipe mouth of epicoele connection spool end entrance is less than epicoele connection spring terminal entrance to the distance of piston Oil pipe mouth is to the distance of piston；The oil pipe mouth of epicoele connection spool end entrance is less than epicoele to the distance of piston Connect the oil pipe mouth distance to piston of soil suction oil cylinder port, the outlet of hydraulic stroke automatic diverter valve and commutation One control mouth of valve connects with oil pipe；

The cavity of resorption of two soil suction oil cylinders connects with oil pipe.

Of the present utility model have the beneficial effect that

Hydraulic stroke automatic diverter valve of the present utility model can put on the oil pressure of spool end entrance more than executing When being added on the oil pressure of spring terminal entrance, spring is compressed, valve core movement, makes oil can flow out from outlet, real Now control function.

Rotation pump perforating piling machine hydraulic control system of the present utility model can utilize hydraulic stroke reversal valve to control to change To valve, it is achieved two soil suction oil cylinders carry out the action of pumping slurries in turn, thus revolve two of pump perforating piling machine The action in turn of unidirectional mud pump valve, improves pumping slurries efficiency.

Accompanying drawing explanation

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Fig. 1 is prior art unidirectional slush pump structure chart；

Fig. 2 is the diamond soil suction drill bit of rotation pump perforating piling machine and neighbouring structure chart thereof；

Fig. 3 is two unidirectional slush pump structure charts；

Fig. 4-1 is the state of the hydraulic stroke automatic diverter valve that the soil suction oil cylinder that unidirectional slush pump is used is configured One of；

Fig. 4-2 is the state of the hydraulic stroke automatic diverter valve that the soil suction oil cylinder that unidirectional slush pump is used is configured Two；

Fig. 5-1 is one of state of control system of soil suction oil cylinder of two unidirectional mud valves；

Fig. 5-2 is the two of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；

Fig. 5-3 is the three of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；

Fig. 5-4 is the four of the state of the control system of the soil suction oil cylinder of two unidirectional mud valves；

Fig. 6-1 is pressure differential automatic switch structure figure；

Fig. 6-2 is that pressure differential switchs hydraulic fluid port connection diagram automatically；

Fig. 7-11 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control One of state；

Fig. 7-12 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control One of state；

Fig. 7-21 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The two of state；

Fig. 7-22 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The two of state；

Fig. 7-31 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The three of state；

Fig. 7-32 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The three of state；

Fig. 7-41 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The four of state；

Fig. 7-42 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The four of state；

Fig. 7-51 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The five of state；

Fig. 7-52 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The five of state；

Fig. 7-61 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The six of state；

Fig. 7-62 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The six of state；

Fig. 7-71 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The seven of state；

Fig. 7-72 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The seven of state；

Fig. 7-81 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The eight of state；

Fig. 7-82 is the entrance valve block oil cylinder with outlet valve block of two soil suction oil cylinders and two slush pumps of control The eight of state.

Detailed description of the invention

B: the structure of hydraulic stroke automatic diverter valve:

As shown in Fig. 4-1, Fig. 4-2, it is hydraulic stroke automatic diverter valve 3, hydraulic stroke automatic diverter valve 3 Valve pocket 30 is cylindrical, and hydraulic stroke automatic diverter valve 3 has entrance in two ends of valve pocket 30, is respectively Spool end entrance 31 and spring terminal entrance 32, hydraulic stroke automatic diverter valve 3 has outlet at the middle part of valve pocket 30 33, it is provided with spool 34 and spring 35 in valve pocket 30.

Spool 34 has two ends 341,342, and spool 34 coordinates the inwall of valve pocket 30 with end 341,342 And make spool 34 be set in movably in valve pocket 30, two ends of spool 34 it are less than in the middle part of spool 34 for diameter The cervical region 343 in portion 341,342, spool 34 be positioned at hydraulic stroke automatic diverter valve 3 towards spool end entrance 31 Side, there is in spool 34 passage 340, the end towards spool end entrance 31 of passage 340 UNICOM spool 34 Face and the outer surface of cervical region 343.

Spring 35 is positioned at the side towards spring terminal entrance 32 of hydraulic stroke automatic diverter valve 3, spring 35 one end Contact is on hydraulic stroke automatic diverter valve 3, and other end contact is on spool 34.

So, when spool end entrance 31 is identical with the oil pressure of spring terminal entrance 32, the end 342 of spool 34 is blocked up Live outlet 33, be in the state of Fig. 4-1；When the oil pressure of spool end entrance 31 is more than the oil pressure of spring terminal entrance 32 Time, spool 34 can move and compression spring 35, when cervical region 343 alignment outlet 33, enters spool end entrance 31 The oil entered can enter the space corresponding to outer surface of cervical region 343 and from outlet 33 outflow by passage 340, this Time be in the state of Fig. 4-2；Recover mutually when the oil pressure of spool end entrance 31 and spring terminal entrance 32 simultaneously as The elastic force of spring 35, spool 34 can set back, and outlet 33 is blocked in the end 342 of spool 34, is at this moment in figure The state of 4-1.

In other embodiments, it is also possible to simply use a cylindrical valve spool 34 and coordinate with valve pocket 30.As long as Reaching when spool end entrance 31 is identical with the oil pressure of spring terminal entrance 32, outlet 33 is blocked in the end of spool 34； When the oil pressure of spool end entrance 31 is more than the oil pressure of spring terminal entrance 32, spool 34 moves, from spool end entrance 31 oil entered can flow out from outlet 33.

C: realize control to two soil suction oil cylinders with hydraulic pressure automatic change valve:

As shown in Fig. 5-1, Fig. 5-2, Fig. 5-3,5-4:

Unidirectional mud pump valve 7 is corresponding installs a soil suction oil cylinder 1, and this soil suction oil cylinder 1 plays institute in A above exactly The effect of soil suction compression pump 2 described, piston that piston rod 11 outer end of soil suction oil cylinder 1 is connected and end 75 connect, thus the reciprocating motion of the pistons of soil suction oil cylinder 1 be alternately present in can making unidirectional mud pump valve 7 malleation and Negative pressure.

In like manner, unidirectional mud pump valve 7' correspondence installs a soil suction oil cylinder 1', the piston rod 11 ' of soil suction oil cylinder 1 ' The piston that outer end is connected 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 and hydraulic fluid port During 103 connection, hydraulic fluid port 102 connects with hydraulic fluid port 104；After commutation, hydraulic fluid port 101 connects with hydraulic fluid port 104, hydraulic fluid port 102 Connect with hydraulic fluid port 103.Reversal valve 100 has control mouth 105, controls 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 of reversal valve 100 On 101, flowline 222 is connected on the hydraulic fluid port 102 of reversal valve 100.

Soil suction oil cylinder 1 is divided into epicoele 13 and cavity of resorption 14 by piston 12, the hydraulic fluid port of reversal valve 100 103 and epicoele 13 with Oil pipe connects, epicoele 13 have two oil pipes respectively with spool end entrance 31 and the bullet of hydraulic stroke automatic diverter valve 3 Spring end entrance 32 connects, and, soil suction oil cylinder 1 connects the oil pipe mouth distance to piston 12 of spool end entrance 31 It is less than soil suction oil cylinder 1 and connects the oil pipe mouth distance to piston 12 of spring terminal entrance 32, and, soil suction oil cylinder The 1 oil pipe mouth connecting spool end entrance 31 is less than soil suction oil cylinder 1 to the distance of piston 12 and connects hydraulic fluid port 103 (so, after following actual motion, cavity of resorption 14 and cavity of resorption 14' are the most not to the distance of piston 12 for oil pipe mouth Can be related with oil inlet pipe 221 and flowline 222, the oil mass in cavity of resorption 14 and cavity of resorption 14' is only constant, Confusion will not occur).The outlet 33 of hydraulic stroke automatic diverter valve 3 and the control mouth 105 of reversal valve 100 are with oil Pipe connects.

Soil suction oil cylinder 1' is divided into epicoele 13' and cavity of resorption 14', the hydraulic fluid port 104 of reversal valve 100 and epicoele by piston 12' 13' connects with oil pipe, and epicoele 13' has two oil pipes spool end respectively with hydraulic stroke automatic diverter valve 3' to enter Mouth 31' connects with spring terminal entrance 32', and, soil suction oil cylinder 1' connects the oil pipe mouth of spool end entrance 31' and arrives The distance of piston 12' be less than soil suction oil cylinder 1' connect spring terminal entrance 32' oil pipe mouth to piston 12' away from From, and, the distance of the oil pipe mouth of connection spool end entrance 31' to piston 12' is less than soil suction oil cylinder 1' even The oil pipe mouth of oil-collecting hole 104 is to the distance of piston 12'.The outlet 33' of hydraulic stroke automatic diverter valve 3' and commutation The control mouth 106 of valve 100 connects with oil pipe.

Above-mentioned cavity of resorption 14 connects with oil pipe with cavity of resorption 14'.

During actual operation:

Such as Fig. 5-1, when hydraulic fluid port 101 connects with hydraulic fluid port 103, hydraulic fluid port 102 connects with hydraulic fluid port 104；

High pressure liquid force feed, from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 103 to epicoele 13, promotes piston 12 descending, Producing malleation in the most unidirectional mud pump valve 7, mud weak soil is forced out outlet 72, exports ground from mud tube 60 Lead to mud pit afterwards.Oil in cavity of resorption 14 is pressed against in cavity of resorption 14' simultaneously, and piston 12' is promoted rising, on Oil in the 13' of chamber is delivered to flowline 222 by hydraulic fluid port 104, hydraulic fluid port 102 and is sent, the most unidirectional mud pump valve 7' Interior generation negative pressure, sucks mud weak soil and enters unidirectional mud pump valve 7'.

During this, owing to spool end entrance 31 connects with epicoele 13 with spring terminal entrance 32 always, so The oil pressure of spool end entrance 31 and spring terminal entrance 32 is identical, so being the state of Fig. 4-1, spool 34 Outlet 33 is blocked in end 342, and outlet 33 does not has oil output.In like manner, due to spool end entrance 31' and spring terminal Entrance 32' connects with epicoele 13' always, so the oil pressure of spool end entrance 31' and spring terminal entrance 32' is phase With, the end 342' of spool 34' blocks outlet 33', outlet 33' does not has oil output.

Such as Fig. 5-2, when piston 12' rises above the position that soil suction oil cylinder 1' connects the oil pipe of spool end entrance 31' When putting, but can not arrive the position that soil suction oil cylinder 1' connects the oil pipe of spring terminal entrance 32', this position should It is set to piston 12' and has increased to position, sucked enough mud weak soils in unidirectional mud pump valve 7', and lived Plug 12 has descended to position, and the mud weak soil in unidirectional mud valve 7 is forced out the most substantially.

At this moment, what spool end entrance 31' inputted is the oil of cavity of resorption 14', and spring terminal entrance 32' input is epicoele The oil of 13', the oil pressure of the cavity of resorption 14' oil pressure (so piston 12' can rise) more than epicoele 13', so, The oil pressure of the spool end entrance 31' oil pressure more than spring terminal entrance 32', reaches the state of Fig. 4-2, by spool end The oil that entrance 31' enters can flow out from outlet 33', is at this moment in the state of Fig. 5-2, the oil entrance of outlet 33' Controlling mouth 106, so, reversal valve 100 is controlled by this oil, there occurs commutation, becomes hydraulic fluid port 101 and oil Mouth 104 connection, hydraulic fluid port 102 connects with hydraulic fluid port 103.

Such as Fig. 5-3, so, high pressure liquid force feed from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 104 to epicoele 13', Promoting piston 12' descending, produce malleation in the most unidirectional mud pump valve 7', mud weak soil is forced out outlet 72', Mud pit is led to after mud tube 60 exports ground.Oil in cavity of resorption 14' is pressed against in cavity of resorption 14 simultaneously, lives Plug 12 is risen by promotion, and the oil in epicoele 13 is delivered to flowline 222 by hydraulic fluid port 103, hydraulic fluid port 102 and sent, Produce negative pressure in the most unidirectional mud pump valve 7, suck mud weak soil and enter unidirectional mud pump valve 7.

Piston 12' decline, due to spool end entrance 31' and spring terminal entrance 32' recovered always with epicoele 13' The state of connection, so the oil pressure of spool end entrance 31' and spring terminal entrance 32' is identical, so recovering To the state of Fig. 4-1, the end 342' of spool 34' blocks outlet 33', outlet 33' does not has oil output.Equally, Owing to spool end entrance 31 connects with epicoele 13 with spring terminal entrance 32 always, so spool end entrance 31 and bullet The oil pressure of spring end entrance 32 is identical, so outlet 33 is blocked in the end 342 of spool 34, outlet 33 does not has oil Output.

Such as Fig. 5-4, when piston 12 rises above the position that soil suction oil cylinder 1 connects the oil pipe of spool end entrance 31 Time, but the position that soil suction oil cylinder 1 connects the oil pipe of spring terminal entrance 32 can not be arrived, this position should be arranged Have increased to position for piston 12, in unidirectional mud pump valve 7, suck enough mud weak soils, and piston 12' Having descended to position, the mud weak soil in unidirectional mud valve 7' is forced out the most substantially.

At this time according to identical process above, the oil of outlet 33 enters and controls mouth 105, so, reversal valve 100 Controlled by this oil, there occurs commutation, become hydraulic fluid port 101 and connect with hydraulic fluid port 103, hydraulic fluid port 102 and hydraulic fluid port 104 Connection.

So complete an actuation cycle, so circulate, be achieved that when unidirectional mud valve 7 soil suction enters, single Go out to mud pump valve 7' firming, after soil suction and firming put in place, automatically transfer unidirectional mud valve 7 firming to and go out, single Enter to mud pump valve 7' soil suction.

Above actuation cycle, two unidirectional slush pumps 7,7 ' alternation, it is possible to incessantly by mud Extract out.

The structure that D: pressure differential switchs automatically

As in Figure 6-1, being that pressure differential switchs 4 automatically, it has valve pocket 40, is arranged with one in valve pocket 40 Spool 41, spool 41 has twice annular groove 411,412 and forms the cervical region 413,414 of two minor diameters, Spool 41 remainder is end 415,416 and middle part 417；The two ends of valve pocket 40 connect hydraulic fluid port 42,43, valve The middle part in chamber 40 connects hydraulic fluid port 44,45, has the little spring 47 compressed and the big bullet compressed in valve pocket 40 Spring 48, one end contact of little spring 47 switchs one end with hydraulic fluid port 42 of 4, little spring 47 automatically in pressure differential Other end contact be positioned at this side, end 415 at spool 41, big spring 48 contact pressure differential switchs automatically One end with hydraulic fluid port 43 of 4, the other end contact of big spring 48 spool 41 be positioned at end 416 this Side.When the oil pressure of the hydraulic fluid port 43 of hydraulic fluid port 42 is identical, hydraulic fluid port 44,45 is closed at middle part 417.

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, When pressure differential is △ F, spool 41 moves right compression big spring 48, until annular groove 411 is with hydraulic fluid port 44,45 even Logical namely hydraulic fluid port 44,45 is interconnected, and 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, spool 41 motion compresses little spring 47 to the left, until annular groove 412 is with hydraulic fluid port 44,45 even Logical namely hydraulic fluid port 44,45 is interconnected, and required time is T'；Then T > T'.That is, same power, compression Big spring 48 is relatively difficult, and compression little spring 47 is easier, and compression big spring 48 produces a deformation distance It is long that required time produces same deformation distance required time than compression little spring 47.

During use, such as Fig. 6-2, hydraulic fluid port 44,45 is connected with external pipe respectively, and hydraulic fluid port 42 is connected with hydraulic fluid port 44, Hydraulic fluid port 43 is connected with hydraulic fluid port 45.

The entrance valve block of E: two slush pumps of pressure differential automatic switch control and outlet valve chip architecture figure

As Fig. 7-11,7-12,7-21,7-22,7-31,7-32,7-41,7-42,7-51,7-52, It is two soil suction oil cylinders and two slush pumps of control shown in 7-61,7-62,7-71,7-72,7-81,7-82 Entrance valve block and the oil cylinder eight kinds of states in a cyclic process of outlet valve block.

Wherein, in each state, two set oil inlet pipes 221 and flowline 222 are identical, two reversal valves 100 Same reversal valve can be used, it would however also be possible to employ the reversal valve of two Complete Synchronizations, in order to clearly show that, The system separately performance of the system of two soil suction oil cylinders and the entrance valve block of two slush pumps and outlet valve block, Two of which soil suction cylinder system is exactly the soil suction cylinder system shown in Fig. 5-1,5-2,5-3,5-4.

When the piston movement of soil suction oil cylinder 1 is to when going up most, and soil suction is complete, at this moment the entrance valve block 73 of slush pump 7 Opening, outlet valve block 74 is to close, and at this moment reversal valve 100 commutates, and the piston of soil suction oil cylinder 1 will be to Lower motion, carries out firming, at this moment should have one and make entrance valve block 73 first close than relatively rapid action, go out Mouth valve block 74 is opened again, because if outlet valve block 74 is first opened and entrance valve block 73 no closedown, and this mud The main pipeline of pump 7 is logical, and mud can flow backwards, namely the oil cylinder 731 controlling entrance valve block 73 first to move Making, rear action wanted by the oil cylinder 741 controlling outlet valve block 74, then keeps entrance valve block 73 close and export valve block 74 states opened, carry out firming；

Otherwise, when the piston movement of soil suction oil cylinder 1 is to when descending most, and firming is complete, at this moment the outlet of slush pump 7 Valve block 74 is opened, and entrance valve block 73 is to close, and at this moment reversal valve 100 commutates, the work of soil suction oil cylinder 1 Plug will move upward, and carry out soil suction, at this moment should have one and make outlet valve block 74 first close than relatively rapid action Closing, entrance valve block 73 is opened again, because if entrance valve block 73 is first opened and is exported valve block 74 and do not close, this The main pipeline of individual slush pump 7 is logical, and mud can flow backwards, namely controls the oil cylinder 741 of outlet valve block 74 Wanting first action, rear action wanted by the oil cylinder 731 controlling entrance valve block 73, then keeps outlet valve block 74 close and enter The state that mouth 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 Fig. 7-11,7-12,7-21,7-22,7-31,7-32,7-41,7-42,7-51,7-52, Shown in 7-61,7-62,7-71,7-72,7-81,7-82:

Figure medial end portions 75 belongs to slush pump 7, is used for connecting soil suction oil cylinder 1；End 75' belongs to slush pump 7', uses In 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, mud The entrance valve block 73 of pump 7 is opened, until piston 7310 rises to extreme position, and the entrance valve block 73 of slush pump 7 Fully open；When piston 7310 declines, the entrance valve block 73 of slush pump 7 is closed, until piston 7310 declines To extreme position, the entrance valve block 73 of slush pump 7 completely closes.

Oil cylinder 741 is divided into epicoele 7411 and cavity of resorption 7412 by piston 7410；When piston 7410 rises, mud The outlet valve block 74 of pump 7 is opened, until piston 7410 rises to extreme position, and the outlet valve block 74 of slush pump 7 Fully open；When piston 7410 declines, the outlet valve block 74 of slush pump 7 is closed, until piston 7410 declines To extreme position, the outlet valve block 74 of slush pump 7 completely closes.

Oil cylinder 731' is divided into epicoele 7311' and cavity of resorption 7312' by piston 7310'；When piston 7310' rises, The entrance valve block 73' of slush pump 7' opens, until piston 7310' rises to extreme position, slush pump 7' enters Mouth valve block 73' fully opens；When piston 7310' declines, the entrance valve block 73' of slush pump 7' closes, until Piston 7310' drops to extreme position, and the entrance valve block 73' of slush pump 7' completely closes.

Oil cylinder 741' is divided into epicoele 7411' and cavity of resorption 7412' by piston 7410'；When piston 7410' rises, The outlet valve block 74' of slush pump 7' opens, until piston 7410' rises to extreme position, slush pump 7' goes out Mouth valve block 74' fully opens；When piston 7410' declines, the outlet valve block 74' of slush pump 7 closes, until Piston 7410' drops to extreme position, and the outlet valve block 74' of slush pump 7' completely closes.

The hydraulic fluid port 103 of reversal valve 100 is connected with the epicoele 7311 of oil cylinder 731, connects with the cavity of resorption 7412 of oil cylinder 741 Connect, be connected with the cavity of resorption 7312' of oil cylinder 731', be connected with the epicoele 7411' of oil cylinder 741'.

The hydraulic fluid port 104 of reversal valve 100 automatically switchs the hydraulic fluid port 45 of 4 and is connected with the first pressure differential, and the first pressure differential is certainly The hydraulic fluid port 44 of dynamic switch 4 is connected with the epicoele 7411 of oil cylinder 741, and with the epicoele 7311' company of oil cylinder 731' Connect.First pressure differential automatically switchs the hydraulic fluid port 45 of 4 and is connected with hydraulic fluid port 43, and hydraulic fluid port 42 is connected with hydraulic fluid port 44.

The hydraulic fluid port 104 of reversal valve 100 also automatically switchs the hydraulic fluid port 44' of 4' and is connected with the second pressure differential, the second pressure The hydraulic fluid port 45' of difference automatically switch 4' is connected with the cavity of resorption 7312 of oil cylinder 731, and with the cavity of resorption of oil cylinder 741' 7412' connects.Second pressure differential automatically switchs the hydraulic fluid port 45' of 4' and is connected with hydraulic fluid port 43', hydraulic fluid port 42' and hydraulic fluid port 44' connects.

First pressure differential switchs 4 automatically, and automatically to switch 4' with the second pressure differential identical.

Fig. 7-11,7-12 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the first of oil cylinder 741' The state of kind:

At this moment, the firming of slush pump 7 just completes, and the piston 12 of soil suction oil cylinder 1 runs to lower limit, oil cylinder 731 Piston 7310 run to lower limit, entrance valve block 73 is closed, and the piston 7410 of oil cylinder 741 runs to the upper limit, goes out Mouth valve block 74 is opened.

At this moment, the soil suction of slush pump 7' just completes, and the piston 12' of soil suction oil cylinder 1' runs to the upper limit, oil cylinder The piston 7310' of 731' runs to the upper limit, and entrance valve block 73' opens, and the piston 7410' of oil cylinder 741' runs to Lower limit, outlet valve block 74' closes.

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.

First pressure differential automatically switchs the middle part 417 of 4 and closes hydraulic fluid port 45,44.

Second pressure differential automatically switch 4' middle part 417' close hydraulic fluid port 45', 44'.

Fig. 7-21,7-22 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the second of oil cylinder 741' The state of kind:

After arriving the state of Fig. 7-11,7-12, owing to hydraulic pressure automatic change valve 3' is activated, so reversal valve 100 commutations, hydraulic fluid port 101 is 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, enters the first pressure from hydraulic fluid port 43 Difference automatically switch 4 and compress little spring 47, enter the second pressure differential from hydraulic fluid port 42' simultaneously and automatically switch 4' and press Contracting big spring 48'.

Owing to, under same pressure, little spring 47 is easier than big spring 48' to be compressed, and the deformation of little spring 47 is fast.

So, annular groove 412 first connects with hydraulic fluid port 45, hydraulic fluid port 44.

Hydraulic oil is from hydraulic fluid port 45, annular groove 412, hydraulic fluid port 44, subsequently into the epicoele 7411, simultaneously of oil cylinder 741 Enter the epicoele 7311' of oil cylinder 731'.

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, The piston 7310' of oil cylinder 731' drops to lower limit, namely the entrance valve block 73' of slush pump 7' closes.

And the now deformation of big spring 48' is slow, the piston 7310 of oil cylinder 731 is motionless, namely the outlet of slush pump 7 Valve block 74 closes but entrance valve block 73 is not opened, and the piston 7410' of oil cylinder 741' is motionless, namely mud But the entrance valve block 73' of pump 7' closes outlet, and valve block 74' does not opens.

Fig. 7-31,7-32 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 3rd of oil cylinder 741' the The state of kind:

After reaching the second state, owing to the piston 7410 of oil cylinder 741 drops to lower limit, the work of oil cylinder 731' Plug 7310' drops to lower limit, so the oil pressure in oil cylinder 741, oil cylinder 731' constantly raises, namely hydraulic fluid port 42 Oil pressure constantly raise, until this oil pressure height to by big spring 48 to back pressure contracting, automatic in the first pressure differential When hydraulic fluid port 45,44 are closed at the middle part 417 of switch 4, the oil pressure of hydraulic fluid port 43 and hydraulic fluid port 42 reaches balance.

And now, deforming slower big spring 48' is put in place by compression, annular groove 411' and hydraulic fluid port 44', oil Mouth 45' connection.

Hydraulic oil from hydraulic fluid port 44', annular groove 411', hydraulic fluid port 45', subsequently into oil cylinder 731 cavity of resorption 7312, with Time enter 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, The piston 7410' of oil cylinder 741' rises to the upper limit, namely the outlet valve block 74' of slush pump 7' opens.

Fig. 7-41,7-42 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 4th of oil cylinder 741' the The state of kind:

After arriving the third state, owing to the piston 7310 of oil cylinder 731 rises to the upper limit, the piston of oil cylinder 741' 7410' rises to the upper limit, so the oil pressure in oil cylinder 731, oil cylinder 741' constantly raises, namely hydraulic fluid port 43' Oil pressure constantly raises, until this oil pressure height contracts to by little spring 47' to back pressure, automatically opens in the second pressure differential When closing middle part 417' closing hydraulic fluid port 45', 44' of 4', the oil pressure of hydraulic fluid port 43' and hydraulic fluid port 42' reaches 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''s Entrance valve block 73' closes, and outlet valve block 74' opens.

Now, the piston 12 of soil suction oil cylinder 1 rises, and slush pump 7 carries out soil suction, the piston 12' of soil suction oil cylinder 1' Declining, slush pump 7' carries out firming.

During above-mentioned soil suction, firming, the first pressure differential automatically switch the 4, second pressure differential automatically switch 4', Oil cylinder 731, oil cylinder 741, oil cylinder 731', the state of oil cylinder 741' are always maintained at.

Fig. 7-51,7-52 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 5th of oil cylinder 741' the The state of kind:

At this moment, the soil suction of slush pump 7 just completes, and the piston 12 of soil suction oil cylinder 1 runs to the upper limit, oil cylinder 731 Piston 7310 run to the upper limit, entrance valve block 73 is opened, and the piston 7410 of oil cylinder 741 runs to lower limit, goes out Mouth valve block 74 is closed.

At this moment, the firming of slush pump 7' just completes, and the piston 12' of soil suction oil cylinder 1' runs to lower limit, oil cylinder The piston 7310' of 731' runs to lower limit, and entrance valve block 73' closes, and the piston 7410' of oil cylinder 741' runs to The upper limit, outlet valve block 74' opens.

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.

First pressure differential automatically switchs the middle part 417 of 4 and closes hydraulic fluid port 45,44.

Second pressure differential automatically switch 4' middle part 417' close hydraulic fluid port 45', 44'.

Fig. 7-61,7-62 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 6th of oil cylinder 741' the The state of kind:

After arriving the state of Fig. 7-51,7-52, owing to hydraulic pressure automatic change valve 3 is activated, so reversal valve 100 Commutation, hydraulic fluid port 101 is 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, enters the epicoele 7311 of oil cylinder 731 With the epicoele 7411' of oil cylinder 741', the cavity of resorption 7312 of such oil cylinder 731 and the oil of the cavity of resorption 7412' of oil cylinder 741' It is under pressure, and this pressure transmission is to hydraulic fluid port 43', and enter the second pressure differential and automatically switch 4', and compress little Spring 47'.

Meanwhile, high pressure liquid force feed enters from oil inlet pipe 221, hydraulic fluid port 101, hydraulic fluid port 103, enters oil cylinder 741 The cavity of resorption 7312' of cavity of resorption 7412 and oil cylinder 731', so, the epicoele 7411 of oil cylinder 741 and oil cylinder 731''s is upper The oil of chamber 7311' is under pressure, and this pressure transmission is to hydraulic fluid port 42, and enters the first pressure differential and automatically switch 4, And compress big spring 48.

Owing to, under same pressure, little spring 47' is easier than big spring 48 to be compressed, and the deformation of little spring 47' is fast.

So, annular groove 412' first connects 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 to lower limit, oil cylinder The oil of the cavity of resorption 7312 of 731 is from hydraulic fluid port 45', annular groove 412', hydraulic fluid port 44', hydraulic fluid port 104, hydraulic fluid port 102, fuel-displaced Pipe 222 flows away.Namely the entrance valve block 73 of slush pump 7 closes.

Hydraulic oil enters the epicoele 7411' of oil cylinder 741', and the piston 7410' of oil cylinder 741' is dropped to lower limit, The oil of the cavity of resorption 7412' of oil cylinder 741' from hydraulic fluid port 45', annular groove 412', hydraulic fluid port 44', hydraulic fluid port 104, hydraulic fluid port 102, Flowline 222 flows away.Namely the outlet valve block 74' of slush pump 7' closes.

And the now deformation of big spring 48 is slow, the piston 7410 of oil cylinder 741 is motionless, namely the entrance of slush pump 7 But valve block 73 closes outlet, and valve block 74 is not opened, and the piston 7310' of oil cylinder 731' is motionless, namely mud The outlet valve block 74' of pump 7' closes but entrance valve block 73' does not opens.

Fig. 7-71,7-72 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 7th of oil cylinder 741' the The state of kind:

After arriving the 6th kind of state, due to the oil of the cavity of resorption 7312 of oil cylinder 731, and the cavity of resorption of oil cylinder 741' The oil of 7412' is lost to the limit, causes the oil pressure of hydraulic fluid port 43' to decline, until this oil pressure drops to little spring 47' replys, when the middle part 417' that the second pressure differential switchs 4' automatically closes hydraulic fluid port 45', 44', and hydraulic fluid port 42' Balance is reached with the oil pressure of hydraulic fluid port 43'.

And now, deforming slower big spring 48 is put in place by compression, annular groove 411 and hydraulic fluid port 44, hydraulic fluid port 45 Connection.

Hydraulic oil enters the cavity of resorption 7412 of oil cylinder 741, and the piston 7410 of oil cylinder 741 is risen to the upper limit, oil cylinder The oil of the epicoele 7411 of 741 is from hydraulic fluid port 44, annular groove 411, hydraulic fluid port 45, hydraulic fluid port 104, hydraulic fluid port 102, flowline 222 flow away.Namely the outlet valve block 74 of slush pump 7 opens.

Hydraulic oil enters the cavity of resorption 7312' of oil cylinder 731', and the piston 7310' of oil cylinder 731' is risen to the upper limit, The oil of the epicoele 7311' of oil cylinder 731' from hydraulic fluid port 44, annular groove 411, hydraulic fluid port 45, hydraulic fluid port 104, hydraulic fluid port 102, Flowline 222 flows away.Namely the entrance valve block 73' of slush pump 7' opens.

Fig. 7-81,7-82 are that reversal valve 100, soil suction oil cylinder 1, soil suction oil cylinder 1', the first pressure differential are left automatically Close the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', the 8th of oil cylinder 741' the The state of kind:

After arriving the 7th kind of state, due to the oil of the epicoele 7411 of oil cylinder 741, and the epicoele of oil cylinder 731' The oil of 7311' is lost to the limit, causes the oil pressure of hydraulic fluid port 42' to decline, until this oil pressure drops to big spring 48 reply, the first pressure differential automatically switch the middle part 417 of 4 close hydraulic fluid port 45,44 time, hydraulic fluid port 42 and hydraulic fluid port The oil pressure of 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''s Entrance valve block 73' opens, and outlet valve block 74' closes.

Now, the piston 12 of soil suction oil cylinder 1 declines, and slush pump 7 carries out firming, the piston 12' of soil suction oil cylinder 1' Rising, slush pump 7' carries out rare earth.

During above-mentioned soil suction, firming, the first pressure differential automatically switch the 4, second pressure differential automatically switch 4', Oil cylinder 731, oil cylinder 741, oil cylinder 731', the state of oil cylinder 741' are always maintained at.

Finally, reach the reversal valve 100 shown in Fig. 7-11,7-12, soil suction oil cylinder 1, soil suction oil cylinder 1', One pressure differential automatically switch the 4, second pressure differential automatically switch 4', oil cylinder 731, oil cylinder 741, oil cylinder 731', The first state of oil cylinder 741', completes a circulation.

Claims (4)

1. hydraulic stroke automatic diverter valve, it is characterised in that: it is respectively equipped with spool end in two ends of valve pocket Entrance and spring terminal entrance, the middle part of valve pocket is provided with outlet, coordinates the inwall of valve pocket to overlap movably in valve pocket It is provided with spool；

One end contact of spring is in the end with spool end entrance, and other end contact is on spool；

There is the end face towards spool end entrance of a passage UNICOM spool and the outer surface of spool sidewall.

2. hydraulic stroke automatic diverter valve as claimed in claim 1, it is characterised in that: there is on spool ring The cervical region that connected in star is formed, the end face towards spool end entrance of described channel connection spool and the appearance of cervical region Face.

3. hydraulic stroke automatic diverter valve as claimed in claim 1, it is characterised in that: described valve pocket is circle Cylindricality.

4. rotation pump perforating piling machine hydraulic control system, it is characterised in that:

Having a reversal valve, reversal valve has oil inlet pipe hydraulic fluid port, flowline hydraulic fluid port and two soil suction oil cylinder ports, When oil inlet pipe hydraulic fluid port and a soil suction oil cylinder port connection, flowline hydraulic fluid port joins with another soil suction oil cylinder port Logical；

Reversal valve also has two to control mouth；

Oil inlet pipe connects oil inlet pipe hydraulic fluid port, and flowline connects flowline hydraulic fluid port；

Being provided with two unidirectional mud pump valves in rotation pump perforating piling machine, each unidirectional mud pump valve correspondence is provided with one Soil suction oil cylinder, each soil suction oil cylinder one hydraulic stroke reversal valve as claimed in claim 1 of configuration；

Each soil suction oil cylinder is divided into epicoele and cavity of resorption by piston；

Epicoele connects with a soil suction oil cylinder port of reversal valve；

Epicoele has two oil pipes spool end entrance and spring terminal entrance respectively with hydraulic stroke automatic diverter valve to connect Logical；The oil pipe mouth of epicoele connection spool end entrance is less than epicoele connection spring terminal entrance to the distance of piston Oil pipe mouth is to the distance of piston；The oil pipe mouth of epicoele connection spool end entrance is less than epicoele to the distance of piston Connect the oil pipe mouth distance to piston of soil suction oil cylinder port, the outlet of hydraulic stroke automatic diverter valve and commutation One control mouth of valve connects with oil pipe；

The cavity of resorption of two soil suction oil cylinders connects with oil pipe.