CN2644511Y

CN2644511Y - Hydraulic system of static pile pressing machine

Info

Publication number: CN2644511Y
Application number: CN 03248663
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 which enables pile pressing function of impact, vibration and hydrostatic. The utility model is characterized in that a pressure switching valve [9] is connected with a tubing [2] between a pile-pressing switching valve [3] and the pile-pressing oil cylinder [1] of the primary hydraulic system, the pressure switching valve [9] is connected with a overflow valve block via the tubing [2], the overflow valve block comprises a high overflow valve [6], a median overflow valve [7] and a low overflow valve [8], the system has the advantages of the coexistence of three mode of impact, vibration and hydrostatic pile-sinking, independent turbocharging system from the general hydraulic system, easy transformation of the primary machine, and improved efficiency and applicability of the series of construction machinery.

Description

The 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:

Yun Hang pile sinking machinery generally is divided three classes in the market: the first kind is with the impact pile driving machine of impact force pile sinking, the type stake machine impact force of weight, its impact force can overcome the soil plug and the radiation damping on stratum, before the radiation damping between stratum and the stake is not set up or is not set up fully, stake is sunk at the soil plug that overcomes the stratum in a flash and radiation damping, therefore the type stake facility have the strong characteristics of penetration power, but noise is very big during the work of the type stake machine, also has the air pollution of certain mist of oil or smog simultaneously; Second class is with the vibro driver of vibration force pile sinking, the fixing vibration force of the type stake unit frequency can force the soil that contacts with stake to produce resonance, thereby make the friction between soil and the stake reduce, simultaneously under certain member action of gravity, make stake overcome the soil plug on stratum and radiation damping and sink, limited because of the deadweight of the type stake machine with vibration force, only on the pile sinking engineering of medium and small tonnage, be applied at present; The 3rd class is with the static pile press of self net gravitational force pile sinking, the type stake machine utilizes the deadweight of stake machine, make stake overcome the soil plug on stratum and radiation damping and sink, 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 weight is big, cost is high, the depression phenomenon easily takes place, penetrate the 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 same stake machine realize piling functions such as impact, vibration, static pressure, and it is simple in structure, according to the needs of different pile sinking pressure modes in the pile driving process, can at any time hydraulic system be switched to corresponding work mode 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 piling oil cylinder, be connected with the pressure transfer valve, on the pressure transfer valve, be connected with the overflow valve group of forming by high-order overflow valve, meta overflow valve, low level overflow valve by oil pipe.

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

1, on a stake machine, has the pile sinking of impact mode, pile vibrosinking mode, static pressure pile-sinking mode simultaneously;

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

3, go for the piling function of all hydraulic static piling machine, improved this class engineering machinery effect and applicability.

Description of drawings:

Fig. 1 is a principle schematic of the present utility model;

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

Fig. 3, Fig. 4 are vibration working method principle schematic of the present utility model;

Fig. 5, Fig. 6 are impact working method principle schematic of the present utility model.

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 4 by oil pipe 2, system's overflow valve 5 is in parallel with oil pump 4 by oil pipe 2, is connected with pressure transfer valve 9 on the oil pipe 2 between piling reversal valve 3 and the piling oil cylinder 1, is connected with the overflow valve group of being made up of high-order overflow valve 6, meta overflow valve 7, low level overflow valve 8 by oil pipe 2 on pressure transfer valve 9.

As shown in Figure 2, when system was in the static pressure working method, pressure transfer valve 9 was in meta, and at this moment oil pipe 2 communicates with meta overflow valve 7 by pressure transfer valve 9, at this moment the pressure P of meta overflow valve 7 _QuietSize is set up on the required force value of static pressure working method.

Hydraulic oil enters in the oil pipe 2 by oil pump 4, and system's overflow valve 5 is stabilized in oil pressure on the setting that satisfies the required oil pressure of whole stake machine, and by operation piling reversal valve 3, the hydraulic oil with pressure is by oil pipe 2, because P in the meta overflow valve 7 _QuietThe pressure regulation effect, the hydraulic oil oil pressure in the oil pipe 2 is limited to the P of meta overflow valve 7 _QuietOn the setting, the 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 Fig. 3, Fig. 4 as can be known, when system was in the vibration working method, the force value of meta overflow valve 7 was set up at P _QuietOn the value, the force value of high-order overflow valve 6 is set up and is P _High=P _Quiet+ Δ P, the force value of low level overflow valve 8 is set up and is P _Low=P _Quiet-Δ P, pressure transfer valve 9 are in dynamically in the circulation of a high position-meta-low level-meta-high position.At this moment oil pipe 2 communicates with high-order overflow valve 6, meta overflow valve 7,8 circulations of low level overflow valve by pressure transfer valve 9, by the cycle frequency of adjustment pressure transfer valve 9, thus the circulation change frequency of change pressore setting.

Hydraulic oil enters in the oil pipe 2 by oil pump 4, and the 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 at P the time _HighWith P _QuietAnd P _LowBetween circulation change, so piling oil cylinder 1 produces the pressure action that respective cycle changes, thereby realize the vibration working method of hydraulic system.

By Fig. 5, Fig. 6 as can be known, when system was in the impact working method, the force value of meta overflow valve 7 was set up at P _QuietOn the value, the force value of high-order overflow valve 6 is set up and is P _High=P _Quiet+ Δ P, the force value of low level overflow valve 8 is set up and is P _Low=0.Pressure transfer valve 9 is in dynamically in the circulation of a high position-low level-high position, at this moment oil pipe 2 communicates with high-

order overflow valve

6,8 circulations of low level overflow valve by pressure transfer valve 9, by the cycle frequency of adjustment pressure transfer valve 9, thus the circulation change frequency of change pressore setting.

Hydraulic oil enters in the oil pipe 2 by oil pump 4, and the 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 at P the time _HighAnd impact variation between 0, so piling oil cylinder 1 produces the relevant pressure value at P _HighAnd the surge that changes between 0 action, impact stroke is P by the piling oil cylinder at oil pressure then _HighThe time piston rod stretch out and make the stake machine raise and be that piston rod withdrawal in 0 o'clock makes the stake machine descend to produce at oil pressure, thereby realize the impact work of hydraulic system.

Pressure transfer valve 9 described in the utility model is three-position four-way valve, and its action 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 [4] by oil pipe [2], system's overflow valve [5] is in parallel with oil pump [4] by oil pipe [2], it is characterized in that on the oil pipe [2] between piling reversal valve [3] and the piling oil cylinder [1], being connected with pressure transfer valve [9], go up at pressure transfer valve [9] and be connected with the overflow valve group of forming by high-order overflow valve [6], meta overflow valve [7], low level overflow valve [8] by oil pipe [2].