CN2835674Y - Pile pressing hydraulic control loop for hydraulic static pile pressing machine - Google Patents
Pile pressing hydraulic control loop for hydraulic static pile pressing machine Download PDFInfo
- Publication number
- CN2835674Y CN2835674Y CN 200520051130 CN200520051130U CN2835674Y CN 2835674 Y CN2835674 Y CN 2835674Y CN 200520051130 CN200520051130 CN 200520051130 CN 200520051130 U CN200520051130 U CN 200520051130U CN 2835674 Y CN2835674 Y CN 2835674Y
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- CN
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- Prior art keywords
- piling
- pile pressing
- oil cylinder
- hydraulic
- valve
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The utility model relates to a pile pressing hydraulic control loop for a hydraulic static pile pressing machine. The utility model comprises a three-position four-way change valve 1, a pile pressing oil cylinder 2, and a speeding switching valve which is connected between the three-position four-way change valve 1 and the pile pressing oil cylinder 2 and plays the speeding control switching action. The on-off of a non-rod cavity oil passage and a rod cavity oil passage of the pile pressing oil cylinder is switched by the speeding switching valve, which leads hydraulic oil in a rod cavity of the pile pressing oil cylinder to enter a non-rod cavity when the three-position four-way change valve is in a pile pressing gear. Compared with the existing pile pressing hydraulic control loop, under the same pile pressing oil pressure, because the area of a piston rod a< g > is smaller than the area of a piston a< x >, the pile pressing speed is improved and the work efficiency is raised.
Description
Technical field
The utility model relates to the piling hydraulic control circuit of a kind of hydraulic static piling machine, particularly hydraulic static piling machine.
Background technique
Hydraulic static piling machine be a kind of be driving with the oil pressure, rely on the machine own wt that precast pile is undisturbedly sunk to efficient pollution-free pile foundation construction machinery in the ground.The crucial determinant factor of the operating efficiency of hydraulic static piling machine is the piling speed of piling oil cylinder.Fig. 1 is the piling hydraulic control circuit of present domestic hydraulic static piling machine, form by a three position four-way directional control valve 1 and piling oil cylinder 2, the a position of the three position four-way directional control valve 1 of O type function is the piling position among the figure, after folder stake system clamps precast pile, pressure oil p enters the rodless cavity C of piling oil cylinder 2 by selector valve, from oil circuit O oil sump tank, then piston rod e stretches out the rod chamber d of piling oil cylinder 2 through selector valve 1, by Pile holding mechanism precast pile is sunk in the ground; Selector valve b position is for carrying a position, after precast pile unclamps in folder stake system, when selector valve 1 is in position b, pressure oil p enters the rod chamber d of piling oil cylinder 2 by selector valve 1, the rodless cavity c of oil cylinder 2 is through selector valve 2 and oil circuit o oil sump tank, then piston e regains in the cylinder, and Pile holding mechanism is lifted to initial position; When selector valve is in meta, for next piling circulation is prepared.
If oil supply system was supplied with the effective discharge of the rodless cavity c of piling oil cylinder 2, a when Q was pile sinking
sBe the dowel pressing cylinder piston area, then the pile sinking speed v is calculated by formula (1):
By formula (1) as can be known, by piling loop shown in Figure 1, the measure that improves pile sinking speed has following several:
1, improves the hydraulic pressure pump delivery, to increase flow Q as far as possible;
2, adopt more powerful motor to improve flow Q and piling oil pressure as far as possible;
3, reduce the cylinder diameter of piling oil cylinder to reduce piston area a
s, but this will be a cost to improve the piling oil pressure.
By the 1st kind of mode, the increase of hydraulic pump discharge is limited, and increases pump delivery, has both increased the cost of buying oil hydraulic pump, and also be along with discharge capacity improves and slightly reduces the working life of pump; By the 2nd kind of mode, the raising of power of motor also is limited; By the 3rd kind of mode, reduce dowel pressing cylinder piston area a
s, reaching the required oil pressure of identical pile driving pressure also with regard to corresponding proportional the raising, will have a negative impact this working life to hydraulic system.Especially for the hydraulic static piling machine of big piling tonnage, its power consumpiton is big, and near the specified limit of bearing of high voltage supply circuit, the hydraulic system rated working pressure is also near the rated working pressure grade limit of main hydraulic.So it has not been quite reasonable method that above-mentioned three kinds of modes improve pile sinking speed.Because present hydraulic static piling machine hydraulic control circuit itself does not have piling to quicken the control function, this has restricted the lifting of hydraulic static piling machine performance.
Summary of the invention
Quicken slow problem at present hydraulic static piling machine piling, the utility model provides a kind of hydraulic control circuit that function is quickened in piling that has, to improve pile sinking speed.
The piling hydraulic control circuit of hydraulic static piling machine, comprise a three position four-way directional control valve 1 and piling oil cylinder 2, comprise that also is connected the acceleration switching valve that plaing between three position four-way directional control valve 1 and the piling oil cylinder 2 quickens control switching effect, realize the break-make of piling oil cylinder rodless cavity oil circuit and rod chamber oil circuit is switched by this acceleration switching valve, make three position four-way directional control valve piling cylinder rod chamber hydraulic oil when the piling gear enter rodless cavity, thereby improve the piston rod movement speed in the piling process.Piling this moment speed v
2For
Q is identical with Q in the formula (1) in the formula (2), a
gPiston rod area for the piling oil cylinder.Obviously, a
s＞a
g, by formula (2) and formula (1) as can be known: v
2Greater than v
1, piling speed is exactly normal piling speed fast
Doubly.
The utility model is compared with existing piling hydraulic control circuit, under identical piling oil pressure condition, because piston rod area a
gLess than piston area a
s, help improving piling speed, significantly improve working efficiency.
Description of drawings
Fig. 1 is the piling hydraulic control circuit of present hydraulic static piling machine.
Fig. 2: piling hydraulic control circuit when selector valve is connected in parallel with the employing of acceleration switching valve.
Fig. 3: piling hydraulic control circuit when selector valve is connected in series with the employing of acceleration switching valve.
Fig. 4: the part hydraulic control circuit that adopts hydraulic static piling machine of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but is not limited to embodiment.
Embodiment 1: selector valve 1 adopts the relations of being connected in parallel with acceleration switching valve 3.The piling hydraulic control circuit comprises a three position four-way directional control valve 1 and piling oil cylinder 2, and quickens switching valve 3, as shown in Figure 2.
Its working procedure is as follows: when selector valve 1 is in meta, when acceleration switching valve 3 is in the h position, be non-acceleration piling gear, pressure oil P enters the rodless cavity c of piling oil cylinder 2 from acceleration switching valve 3, the piston rod e of hydraulic driving piling oil cylinder 2 stretches out, and pile sinking speed is calculated by formula (1); When selector valve 1 is in the b position, when acceleration switching valve 3 is in meta, carry the stake position for non-acceleration shelves, oil pressure drives the piston rod e withdrawal of piling oil cylinder 2; When selector valve 1 is in meta, 2 stop motions of piling oil cylinder.
Be in the i position when quickening switching valve 3, when selector valve 1 is in a position, then realize quick piling.The function of i position is to make A
2, B
2Two hydraulic fluid ports communicate, but P, O mouth be cut off, if when handling selector valve 1 this moment and putting a position, pressure oil p enters the rodless cavity c of piling oil cylinder 2 through selector valve 1, and the pressure oil of rod chamber d is not oil sump tank, but from quickening the B of switching valve 3
2Mouth is to A
2Mouth returns the rodless cavity c of piling oil cylinder 2.
Under above-mentioned quick piling state,, at first must will speed up switching valve 3 and place meta if will stop piling, to cut off the passage between piling oil cylinder 2 rodless cavity c and the rod chamber d, again selector valve 1 is placed meta, piling oil cylinder 2 cuts off with outside, and the piling campaign stops; Be under the prerequisite of meta at acceleration switching valve 3, selector valve 1 is in the b position always, and the dowel pressing cylinder piston bar is regained, and promptly is to propose stake work.
Embodiment 2: selector valve 1 adopts the relations of being connected in series with acceleration switching valve 4.The piling hydraulic control circuit comprises the three position four-way directional control valve 1 and the piling oil cylinder 2 of an O type function, and quickens switching valve 4, as shown in Figure 3.
The three position directional valve 1 of O type function and to quicken between the switching valve 4 is series relationship, promptly system's charge oil pressure P and system oil return O respectively only with the A of valve 1
0, B
0Logical, the A of valve 1
1, B
1Mouth respectively with the A of valve 4
3, B
3Mouth communicates.Because valve 1, valve 4 can be used as the bigeminy valve body of one group of adjacent installation in the multiple directional control valve, so A
1-A
3, B
1-B
3Be the inner passage, pipeline needn't be set specially.The hydraulic fluid port A of valve 4
4, B
4The rodless cavity c and the rod chamber d of the external piling oil cylinder of difference.
When acceleration switching valve 4 is in meta or f position, hydraulic fluid port A
1-A
3, B
1-B
3Between communicate, handle selector valve 1 to a position or b position, can carry out the piling of non-acceleration gear or propose stake.Uniquely with the non-acceleration piling of Fig. 1, Fig. 2 gear different be that the hydraulic fluid port of Fig. 3 piling oil cylinder 2 is not directly and A
1, B
1Communicate, but by quickening the oil duct A of switching valve 4
3-A
4, B
3-B
4As transition passage.
When quicken switching valve 4 be in the g position, when selector valve 1 is in a position, system is in quick piling state: system oil pressure P is through A
0-A
1-A
3, more respectively from A
4, B
4Enter the rodless cavity c and the rod chamber d of oil cylinder 2, piling speed is calculated by formula (2).Switching valve 4 is in the g position when quickening, during when selector valve 1 is in meta or b position, no pressure oils enter in the piling oil cylinder 2, oil cylinder is not worked;
When stake being pressed onto the position according to above-mentioned quick piling gear, in the time of need carrying, make earlier and quicken switching valve 4 and be in meta or f position, make selector valve 1 be in the b position again, can realize proposing stake.
Embodiment 3: Fig. 4 is the part hydraulic control circuit of certain model hydraulic static piling machine, Q
1, Q
3Represent main piling oil cylinder rodless cavity and rod chamber oil flow respectively.This loop has adopted manual direct operated 32 latus rectum multiple directional control valve DLF to control.Multiple directional control valve DLF wherein one 41 is used for the stake of control folder stake oil cylinder folder and pine stake action (figure do not draw a folder stake oil cylinder), another connection 42 of multiple directional control valve DLF is used to control the afterburning action of piling of the secondary piling oil cylinder 5,6 of relation in parallel, and another connection 43 is used to control two main piling oil cylinders 7 of relation in parallel and 8 action.Last 44 in connection of multiple directional control valve DLF is to be used for quick piling control.For Fig. 4 and Fig. 2,43,44 commutation function is just the same with part 1, part 3 respectively, and they all are to be used for piling control.
When 41 of multiple directional control valve DLF is in a
1, a control folder stake oil cylinder clamps precast pile, is adjusted to meta with 41 then, carries out piling control piling process again and can carry out following fourth gear adjusting according to operating mode:
First grade---the quick shelves of main piling oil cylinder 7,8 independent pilings.Earlier place c with 43
1The position, 44 place d
2The position, then according to the differential piling principle described in " the first cover Differential Control scheme ", the piling fast simultaneously of main piling oil cylinder 7,8, piling speed is calculated by formula (2).After a piling stroke is finished, place meta with 43,44 earlier, place a with 41 again
2The position, then a folder stake oil cylinder carries out pine stake, after being totally released, puts meta with 41, puts c with 43 at last
2The position, main piling oil cylinder 7,8 pistons reclaim, and with mentioning initial position on the pile clamping box, at last 43 of multiple directional control valve DLF are put meta, so far, have finished a quick piling circulation.
Second grade---the shelves at a slow speed of main piling oil cylinder 7,8 independent pilings.Along with the ground depths is constantly sunk in stake, load resistance will constantly increase.When pressing to go down too greatly because of resistance, 44 of multiple directional control valve DLF is placed d by first grade of piling
1The position, by the first cover Differential Control scheme as can be known, piling this moment oil cylinder 7,8 piston rod movement speed will reduce, but the pile driving pressure of output will increase, so stake will continue sinking, piling speed is pressed formula (1) calculating.
The quick shelves of third gear---main piling oil cylinder 7,8 and 5,6 pilings simultaneously of secondary piling oil cylinder.If by first grade of piling, when pressing to go down too greatly, can when keeping main piling oil cylinder 7,8 to be in the acceleration gear, (promptly 44 remain on d because of load
2), 42 are coupled to b among the manipulation multiple directional control valve DLF
1The position, secondary piling oil cylinder 5,6 piston rods stretch out and carry out reinforcing, and under major and minor four piling oil cylinders acted on simultaneously, stake was sunk continuing.When being in b
2During the position, secondary piling oil cylinder 5,6 piston rods withdrawal.
The shelves at a slow speed of fourth speed---major and minor piling oil cylinder piling simultaneously.If by the third gear piling, when pressing to go down, then 44 of multiple directional control valve DLF can be placed d because of the load increase
1The position, all the other are constant, and this reduces winner's piling oil cylinder 7,8 speed, but pile driving pressure increases, and main piling oil cylinder is in non-accelerating state, thereby pile driving pressure increases, under major and minor piling oil cylinder acts on simultaneously, stake will continue to sink, until the maximum pile driving pressure that reaches setting.Because four oil cylinders move simultaneously, and 44 be in non-accelerations, thereby piling speed is the slowest.
Claims (1)
1. the piling hydraulic control circuit of hydraulic static piling machine, comprise a three position four-way directional control valve and piling oil cylinder, it is characterized in that: comprise that also is connected the acceleration switching valve that plaing between three position four-way directional control valve and the piling oil cylinder quickens control switching effect, realize the break-make of piling oil cylinder rodless cavity oil circuit and rod chamber oil circuit is switched by this acceleration switching valve, make three position four-way directional control valve piling cylinder rod chamber hydraulic oil when the piling gear enter rodless cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520051130 CN2835674Y (en) | 2005-06-17 | 2005-06-17 | Pile pressing hydraulic control loop for hydraulic static pile pressing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520051130 CN2835674Y (en) | 2005-06-17 | 2005-06-17 | Pile pressing hydraulic control loop for hydraulic static pile pressing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2835674Y true CN2835674Y (en) | 2006-11-08 |
Family
ID=37300328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520051130 Expired - Fee Related CN2835674Y (en) | 2005-06-17 | 2005-06-17 | Pile pressing hydraulic control loop for hydraulic static pile pressing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2835674Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996553A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN108978658A (en) * | 2018-07-31 | 2018-12-11 | 湖南拓沃重工科技有限公司 | A kind of static pile press piling hydraulic system and pile pressing method |
-
2005
- 2005-06-17 CN CN 200520051130 patent/CN2835674Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996553A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN102996553B (en) * | 2012-11-27 | 2015-06-10 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN108978658A (en) * | 2018-07-31 | 2018-12-11 | 湖南拓沃重工科技有限公司 | A kind of static pile press piling hydraulic system and pile pressing method |
| CN108978658B (en) * | 2018-07-31 | 2021-02-05 | 湖南拓沃重工科技有限公司 | Pile pressing hydraulic system and pile pressing method of static pile pressing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |