CN2644510Y

CN2644510Y - Hydraulic system of static pile pressing machine

Info

Publication number: CN2644510Y
Application number: CN 03248662
Authority: CN
Inventors: 曹珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-28
Filing date: 2003-08-28
Publication date: 2004-09-29
Anticipated expiration: 2013-08-28

Abstract

The utility model discloses a hydraulic system of a hydrostatic pressure pile driver that the pile driving pressure can exceed the deadweight of pile driver, which is characterized in that a system unilateral valve [5] is connected with a tubing [2] between a directional valve of a primary hydraulic system [3] and a pump [7], a turbocharging unilateral valve [4] is arranged between the directional valve [3] and the system unilateral valve [5], the turbocharging unilateral valve [4] is connected with a two-position two-port [8] by the tubing [2], the two-position two-port [8] is connected with a turbocharging pump [10] by the tubing [2], a turbocharging relief valve [9] is connected with the turbocharging pump [10] by the tubing [2], the system has the advantages of the coexistence of two mode of turbocharging, hydrostatic pressing pile-sinking, simple pressing pile system, independent turbocharging system from the general hydraulic system, easy transformation of the primary machine, controllable increment of the pile driving pressure from the turbocharging system, no mutation of the stress of the whole pile machine, safe structure of the pile machine and lower noise.

Description

A kind of hydraulic system of static pile press

Technical field:

The utility model relates to a kind of building machinery, specifically a kind of hydraulic system of static pile press.

Background technology:

The hydraulic static pile pressing machine of operation utilizes the deadweight of stake machine in the market, makes stake overcome the soil plug on stratum and radiation damping and sinks.Noise is little during the work of the type stake machine, pile sinking power big, the pile sinking degree of depth is accurate, but the type stake machine is when carrying out large-tonnage piling process, because the deadweight that need equate with pile driving pressure, the restriction that the volume size of while stake machine self is made and transported, can not ad infinitum enlarge, add that usually bearing capacity is very low in the construction plant, thus exist the weight of stake machine big, cost is high, the depression phenomenon easily takes place, penetrate the deficiency such as indifferent of layer of sand.

Summary of the invention:

The purpose of this utility model provides a kind of hydraulic system of new static piling machine, it can make pile driving pressure surpass a machine deadweight under the prerequisite that does not increase the deadweight of machine, and it is simple in structure, according to the needs of different pile sinking pressure in the pile driving process, can at any time hydraulic system be switched to static pressure or supercharging working method simultaneously.

The utility model is to adopt following technical scheme to realize its goal of the invention, a kind of hydraulic system of static pile press, it comprises the piling oil cylinder, the piling oil cylinder is connected with the piling reversal valve by oil pipe, the piling reversal valve is connected with oil pump by oil pipe, system's overflow valve is in parallel with oil pump by oil pipe, on the oil pipe between piling reversal valve and the oil pump, be connected with system's one way valve, between piling reversal valve and system's one way valve, be provided with the supercharging one way valve, supercharging one way valve one end links to each other with oil pipe between piling reversal valve and the system's one way valve, the other end of supercharging one way valve links to each other with the bi-bit bi-pass reversal valve by oil pipe, bi-bit bi-pass reversal valve and pressure oil pump link together by oil pipe, and the supercharging overflow valve is in parallel with pressure oil pump by oil pipe.

Principle of the present utility model is when silent piling is carried out in the deadweight that utilizes the stake machine, and when the soil plug on stratum and radiation damping during greater than the deadweight of stake machine, pile body no longer sinks, because hydraulic system directed force F at this moment _QuietSetting is just in time equaling or is being slightly smaller than in the scope of machine deadweight, thereby the stake machine also keeps inactive state motionless; When pressurization system of the present utility model is worked, compare F _QuietBig pressurization system directed force F _IncreaseIncision is come in the very short time, because the deadweight of stake machine is very big, thereby has very big inertia, F _IncreaseWill overcome the gravity of a machine on the one hand, the inertia that overcomes a machine again forces a machine to change to the state of moving upward from inactive state, i.e. F _Increase=G+ma, G are the gravity of stake machine, therefore can draw F _IncreaseThe result of＞G.F _IncreaseAffact above the pile body again simultaneously, thereby pile body is subjected to than the bigger power F of stake machine deadweight _Increase, reach the function of supercharging with this.Because pressurization system is very short action time, therefore the movement velocity V and the displacement S of stake machine will be very little, and when pressurization system quit work, the stake machine also returned to inactive state, displacement S also will eliminate because of the sinking of pile body, thereby pressurization system can begin next working cycles again.

Because adopt technique scheme, the utility model has been realized goal of the invention preferably, and has the following advantages:

1. on a stake machine, have supercharging pile sinking mode, static pressure pile-sinking mode simultaneously;

2. piling system is simple, and pressurization system can be independent of outside the original hydraulic system, is easy to realize producing or the second-hand machine transformation;

3. the pile driving pressure of pressurization system increase is controlled, and a stake machine complete machine stress direction does not have sudden change, stake machine structural safety, and noise is little.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the utility model static pressure working method schematic diagram;

Fig. 3 is the utility model supercharging working method schematic diagram.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of hydraulic system of static pile press, it comprises piling oil cylinder 1, piling oil cylinder 1 is connected with piling reversal valve 3 by oil pipe 2, piling reversal valve 3 is connected with oil pump 7 by oil pipe 2, system's overflow valve 6 is in parallel with oil pump 7 by oil pipe 2, on the oil pipe 2 between piling reversal valve 3 and the oil pump 7, be connected with system's one way valve 5, between piling reversal valve 3 and system's one way valve 5, be provided with supercharging one way valve 4, supercharging one way valve 4 one ends link to each other with oil pipe 2 between piling reversal valve 3 and the system's one way valve 5, the other end of supercharging one way valve 4 links to each other with bi-bit bi-pass reversal valve 8 by oil pipe 2, bi-bit bi-pass reversal valve 8 links together by oil pipe 2 with pressure oil pump 10, and supercharging overflow valve 9 is in parallel with pressure oil pump 10 by oil pipe 2.

By shown in Figure 2, when stake machine 11 was on the static pressure working method, bi-bit bi-pass reversal valve 8 was in right position, and pressure oil pump 10 quits work.Hydraulic oil enters in the oil pipe 2 by oil pump 7, system's overflow valve 6 is stabilized in oil pressure on the setting that satisfies the required oil pressure of static pressure working method, by operation piling reversal valve 3, the hydraulic oil with pressure enters in the piling oil cylinder 1 by oil pipe 2, system's one way valve 5.Because supercharging one way valve 4 is in cut-off state, so hydraulic oil can not enter in bi-bit bi-pass reversal valve 8 and the supercharging overflow valve 9.Hydraulic oil through setting up enters the rodless cavity of piling oil cylinder 1, thereby produces the pressure action of piling oil cylinder 1.Therefore the oil pressure of system is stable the time, so piling oil cylinder 1 produces pressure action stably, thereby realizes the static pressure working method of hydraulic system.

By shown in Figure 3, when the stake machine is on the supercharging working method, pressure oil pump 10 with high-pressure high-flow characteristic is started working, bi-bit bi-pass reversal valve 8 is dynamically in the circulation of position, one left side, one right position, position, a left side, at this moment oil pipe 2 communicates with 9 circulations of supercharging overflow valve by bi-bit bi-pass reversal valve 8, and the pressore setting of supercharging overflow valve 9 is greater than the pressore setting of system's overflow valve 6; By the cycle frequency of adjustment bi-bit bi-pass reversal valve 8, thereby the pressure oil that change pressure oil pump 10 is produced enters the circulation change frequency of hydraulic system.

1. when bi-bit bi-pass reversal valve 8 was in position, a left side, the high-pressure and hydraulic oil of pressure oil pump 10 outputs entered in the oil pipe 2, because the pressure of pressure oil pump output is higher than the pressure of oil pump 7 outputs, ended 4 conductings of supercharging one way valve so system's one way valve 5 is in.Supercharging overflow valve 9 is stabilized in oil pressure and satisfies on the required oil pressure value of supercharging when work, by operation bi-bit bi-pass reversal valve 8, hydraulic oil with pressure enters piling oil cylinder 1 by supercharging one way valve 4, the hydraulic oil of big-flow high-pressure power is by the rodless cavity of piling oil cylinder 1, overcome the gravity of a machine 11 on the one hand by cylinder body, the inertia that overcomes a machine 11 on the other hand forces a machine 11 to change to the state of moving upward from inactive state, i.e. F _Increase=G+ma, F _IncreaseThe piston rod of reaction force by piling oil cylinder 1 affact above the pile body 12, make the pile driving pressure that pile body 12 obtains greater than 11 deadweights of stake machine.

2. when bi-bit bi-pass reversal valve 8 is in right position, the pressure oil of pressure oil pump 10 outputs can not enter piling oil cylinder 1, supercharging this moment one way valve 4 ends, 5 conductings of system's one way valve, pressure oil oil pressure in the piling oil cylinder 1 returns on the value that system's overflow valve 6 set up, the active force of piling this moment oil cylinder 1 equals or is slightly smaller than the deadweight of a machine 11, thereby stake machine 11 will be in static again.

Be in the one right position circulation of left side position by bi-bit bi-pass reversal valve 8, the stressed and motion state of stake machine 11 reaches the pressurized effect of a machine 11 pilings through the variation in 1,2 liang of step.

The action of bi-bit bi-pass reversal valve 8 described in the utility model can be adopted electronic or hydraulic control.

Claims

1, a kind of hydraulic system of static pile press, it comprises piling oil cylinder [1], piling oil cylinder [1] is connected with piling reversal valve [3] by oil pipe [2], piling reversal valve [3] is connected with oil pump [7] by oil pipe [2], system's overflow valve [6] is in parallel with oil pump [7] by oil pipe [2], it is characterized in that on the oil pipe [2] between piling reversal valve [3] and the oil pump [7], being connected with system's one way valve [5], between piling reversal valve [3] and system's one way valve [5], be provided with supercharging one way valve [4], supercharging one way valve [4] one ends link to each other with oil pipe [2] between piling reversal valve [3] and the system's one way valve [5], the other end of supercharging one way valve [4] links to each other with bi-bit bi-pass reversal valve [8] by oil pipe [2], bi-bit bi-pass reversal valve [8] links together by oil pipe [2] with pressure oil pump [10], and supercharging overflow valve [9] is in parallel with pressure oil pump [10] by oil pipe [2].