CN2561821Y

CN2561821Y - Hydrostatic and ballistic combined hydraulic pile press

Info

Publication number: CN2561821Y
Application number: CN 02224223
Authority: CN
Inventors: 张华平
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-11
Filing date: 2002-06-11
Publication date: 2003-07-23
Anticipated expiration: 2012-06-11

Abstract

A hydraulic pile compressor combined with static pressure and impact is characterized in that a quick-lowering and emergency shutdown hydraulic valve block is connected between a three-position and four-way communicating valve and a pile compression oil cylinder; the hydraulic valve block is directly fixed on the pile compression oil cylinder body to form an integrity; the quick-lowering and emergency shutdown hydraulic valve block is composed of a plurality of one-way valves and hydraulic switch valves, which are connected in the following way: the outlet of a lower cavity one-way valve is connected with the lower cavity of the pile compression oil cylinder and the lower cavity conduit; the inlet of the lower cavity one-way valve is communicated with the hydraulic switch valve outlet and an oil tank returning pipe; the outlet of the upper cavity one-way valve is connected with an upper cavity of the pile compression oil cylinder and the hydraulic switch valve; the inlet of the upper cavity one-way valve is made into a conduit for the upper cavity; the upper/lower cavity conduits are communicated with the hydraulic oil pump and an oil tank through the three-position and four-way communicating valve. The utility model can both utilize the static weight of the pile compressor to fulfill pile compression, and use the impact force from the weight to add pile compression force, and simultaneously, lower the weight and the cost of the device considerably.

Description

Static pressure and impact composite type hydraulic pressure pile press

Technical field: the utility model relates to engineering machinery, relates in particular to the improvement of the structure of building pile press.

Background technology: present pile press both domestic and external mainly contains two kinds: static pressure type and impact type.The static pressure type pile press is to utilize the weight of pile press itself that pile body is pressed in the ground; The impact type pile press is that the impact force of utilizing set on an equipment jump bit that moves up and down to produce is squeezed into pile body in the ground.Peace and quiet when the former works, but weight is very big, moves inconvenience, and cost is also high.Noise was very big when the latter worked, and application places is restricted.Domestic patent hydraulic static power pile press, the patent No. 89102449, also noticed this problem, the way that it adopts is, the piling speed of accelerating the piling oil cylinder produces impact force, reach the effect that increases pile driving pressure, but this method will increase the complexity and the cost of hydraulic system, also can increase the manufacture difficulty of piling oil cylinder.

Summary of the invention: at the shortcoming separately of prior art, technical problem to be solved in the utility model is to provide a kind of pile press static weight that can utilize to come the piling body, also can utilize own wt to produce impact force increases pile driving pressure, and simple in structure, mobile spry and light static pressure and impact composite type hydraulic pressure pile press.

For this reason, technical solution of the present utility model is a kind of static pressure and impacts composite type hydraulic pressure pile press, formed by the hydraulic system, the piling oil cylinder that are installed on the piling machine frame, be it is characterized in that: have additional in the described hydraulic system prompt drop anxious stop hydraulic valve bank and be connected on three position four-way directional control valve and the piling oil cylinder between; And all fastening bindings such as the hydraulic system on described piling machine frame and the frame, piling oil cylinder form integral body, and the anxious hydraulic valve bank of stopping of described prompt drop directly is fixed on integral body of formation on the piling cylinder body;

The anxious hydraulic valve bank of stopping of described prompt drop is linked and is formed by some one way valves, hydraulic pressure break-make transfer valve; Described hydraulic pressure break-make transfer valve and three position four-way directional control valve are automatically controlled or hydraulically-controlled type.

The anxious hydraulic valve bank of stopping of described prompt drop is that the following binding of described valve is formed: the outlet of cavity of resorption one way valve and piling oil cylinder cavity of resorption and down cavities conduit pipe be connected, the import of cavity of resorption one way valve exports with hydraulic pressure break-make transfer valve and the fuel tank return duct is connected; The outlet of epicoele one way valve is connected with the import of piling oil cylinder epicoele and hydraulic pressure break-make transfer valve, and the import of epicoele one way valve constitutes goes up cavities conduit pipe; On described/following cavities conduit pipe is connected with described fuel tank/hydraulic oil pump by three position four-way directional control valve.

The static pressure F that produces except the weight Mg that utilizes pile press self _j=Mg is pressed into pile body outside the ground, the novel pile press of this practicality is owing to adopted the anxious hydraulic valve bank of stopping of prompt drop, therefore can also lean on the pile press own wt to produce impact force and increase pile driving pressure, when promptly local resistance in the face of pile body surpasses the weight of pile press, even the piling oil cylinder continues to press down, but pile body does not sink, and opposite pile press will be lifted by the piling oil cylinder.After pile press (weight Mg) is upwards raised a segment distance h, prompt drop is anxious to stop hydraulic valve bank under the control of control system, the epicoele of dowel pressing cylinder piston is communicated with fuel tank, pressure release rapidly, whole pile press is fallen rapidly, behind the segment distance that descends, close dowel pressing cylinder piston epicoele oil duct immediately, the piston rod of piling oil cylinder stops retraction immediately, and the huge inertia that pile press is descended fast applies a downward impact force F again to pile body _d, calculate by the law of conservation of momentum and to be F _d=Mgt ₁/ t ₂The time t of obvious pile press and pile body bump ₂Time t much smaller than the pile press whereabouts ₁, the surge F that is subjected to of pile body like this _dThe static pressure Mg that will produce, that is: Mgt much larger than the weight of pile press ₁/ t ₂＞Mg;

Therefore, the utility model is compared with the static pressure type pile press, can improve the piling ability of pile press under the prerequisite that does not increase pile press weight; Compare with the impact type pile press, because the decline momentum that it has utilized entire equipment weight is as impact force, the impact force that this impact force produces much larger than the jump bit of impact type pile press; Because the distance that pile press descends fast is shorter, final speed is less before impacting, thus quiet when impacting, can as the impact type pile press, not produce very big noise, can guarantee the equipment peace and quiet, work efficiently;

The utility model is than domestic patent hydraulic static power pile press, and it is simple to have a hydraulic system structure, and pile driving pressure is big, and is in light weight, advantages such as complete machine conveniently moving, thereby implement easily, with low cost, have wide market prospects.

Description of drawings: explain below in conjunction with accompanying drawing.

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

Fig. 2 is the structural representation of the utility model embodiment.

Fig. 3 flows to schematic diagram for the hydraulic system of the utility model embodiment when pressing down pile body.

The hydraulic system of Fig. 4 during for the piling oil cylinder of the utility model embodiment retraction flows to schematic diagram.

The specific embodiment: as shown in Figure 1: a kind of static pressure and impact composite type hydraulic pressure pile press, be by the

hydraulic system

5,6,7 that is installed on the piling machine frame 2, piling oil cylinder 3 is formed, it is characterized in that: have additional in the described hydraulic system that prompt drop is anxious to stop hydraulic valve bank 4 and be connected on three position four-way

directional control valve

5 and 3 of piling oil cylinders, the anxious hydraulic valve bank 4 of stopping of this prompt drop directly is fixed on integral body of formation on piling oil cylinder 3 cylinder bodies; And the hydraulic system on described piling machine frame 2 and the frame comprises that suddenly stop all fastening bindings such as hydraulic valve bank 4, three position four-way directional control valve 5, hydraulic oil pump 6, fuel tank 7 and piling oil cylinder 3 forms integral body to prompt drop; Whole piling machine frame 2 presses down pile body 1 by the piston rod of piling oil cylinder 3.

The anxious hydraulic valve bank 4 of stopping of described prompt drop is linked and is formed by some one way valves, hydraulic pressure break-make transfer valve; Described hydraulic pressure break-make transfer valve and three position four-way directional control valve are automatically controlled or hydraulically-controlled type.

As shown in Figure 2: it is that the following binding of described valve is formed that described prompt drop urgency is stopped hydraulic valve bank 4: the outlet of cavity of resorption one way valve 8 is connected with the cavity of resorption and the following cavities conduit pipe 3-1 of piling oil cylinder 3, and the import of cavity of resorption one way valve 8 is connected with the outlet of hydraulic pressure break-make transfer valve 9 and the return duct 7-0 of fuel tank 7; The outlet of epicoele one way valve 10 is connected with the epicoele of piling oil cylinder 3 and the import of hydraulic pressure break-make transfer valve 9, and the import of epicoele one way valve 10 constitutes goes up cavities conduit pipe 3-2; On described/following cavities conduit pipe 3-1,3-2 be connected with described fuel tank 7 and hydraulic oil pump 6 by three position four-way directional control valve 5.

Now further specify the operating principle of the utility model embodiment in conjunction with Fig. 3,4.

As shown in Figure 3: when primer fluid

pressure oil pump

6, and 5 switchings of control three position four-way directional control valve make the outlet of hydraulic oil pump 6 be communicated with last cavities conduit pipe 3-2, hydraulic oil is injected into the epicoele of piling oil cylinder 3 through epicoele one way valve 10, and the lower channel of cavities conduit pipe 3-1, three position four-way directional control valve 5 passes back into fuel tank 7 under the warp of the hydraulic oil in the cavity of resorption, piston rod in the piling this moment oil cylinder 3 stretches out, and pile press is depressed pile body 1 by the weight of self; The resistance that descends when pile body 1 is during greater than the weight of pile press, and pile body 1 no longer descends; If the piston rod of piling oil cylinder 3 continues to stretch out, piling machine frame 2 can be lifted away from ground, the working limit of Here it is static pressure pile press.

As shown in Figure 4: after piling oil cylinder 3 is lifted away from ground one segment distance with pile press, system's control three position four-way directional control valve 5 switches to meta, control hydraulic pressure break-make transfer valve 9 simultaneously and switch to the connection position, at this moment, the hydraulic oil of piling oil cylinder 3 piston upper chambers flows in the fuel tank 7 through hydraulic pressure break-make transfer valve 9 at once, and part hydraulic oil flows into the piston cavity of resorption of piling oil cylinder 3 through one way valve 8.The piston rod fast retractile of piling oil cylinder 3 like this, under the whole action of gravity of piling machine frame 2, pile press will speed up decline;

A certain position in face of the supporting leg of piling machine frame 2 touches ground, 9 quick closedowns of hydraulic pressure break-make transfer valve, cut off the loop of piling oil cylinder 3 piston upper chambers to fuel tank 7, the piston rod of piling oil cylinder 3 stops withdrawal immediately, at this moment, inertia that pile press descends fast or momentum produce huge impact power by 3 pairs of pile bodies of piling oil cylinder 1, further depress pile body 1.

Prompt drop is anxious stop hydraulic valve bank 4 as an overall fixed on the cylinder body of piling oil cylinder 3, do not expose oil pipe between the two, can increase tolerance performance like this to hydraulic shock, protection hydraulic oil pipe subsequently improves the reliability of hydraulic system.

Claims

1, a kind of static pressure and impact composite type hydraulic pressure pile press, formed by the hydraulic system, the piling oil cylinder that are installed on the piling machine frame, it is characterized in that: have additional in the described hydraulic system prompt drop anxious stop hydraulic valve bank and be connected on three position four-way directional control valve and the piling oil cylinder between, and all fastening bindings such as the hydraulic system on described piling machine frame and the frame, piling oil cylinder form integral body.

2, static pressure as claimed in claim 1 and impact composite type hydraulic pressure pile press is characterized in that: the anxious hydraulic valve bank of stopping of described prompt drop is linked and is formed by some one way valves, hydraulic pressure break-make transfer valve.

3, static pressure as claimed in claim 2 and impact composite type hydraulic pressure pile press, it is characterized in that: the anxious hydraulic valve bank of stopping of described prompt drop is that the following binding of described valve is formed: the outlet of cavity of resorption one way valve and piling oil cylinder cavity of resorption and down cavities conduit pipe be connected, the import of cavity of resorption one way valve exports with hydraulic pressure break-make transfer valve and the fuel tank return duct is connected; The outlet of epicoele one way valve is connected with the import of piling oil cylinder epicoele and hydraulic pressure break-make transfer valve, and the import of epicoele one way valve constitutes goes up cavities conduit pipe; On described/following cavities conduit pipe is connected with described fuel tank/hydraulic oil pump by three position four-way directional control valve.

4, as arbitrary described static pressure in the claim 1,2,3 and impact composite type hydraulic pressure pile press, it is characterized in that: the anxious hydraulic valve bank of stopping of described prompt drop directly is fixed on integral body of formation on the piling cylinder body; Described hydraulic pressure break-make transfer valve and three position four-way directional control valve are automatically controlled or hydraulically-controlled type.