FI115759B - Device generating blows - Google Patents

Description

1,115,759

SHOCK GENERATOR

The invention relates to a shock-generating device comprising a body from which a device can be attached, e.g. to a work machine, a shock-transmitting body which receives the impact of a moving and impacting mass and transmits the impact to the ground or pile or similar or tool and wherein the device is provided with a holding device for engaging the pile or tool between the piece and the pile or tool.

It is previously known, for example, from US Patent No. 5,765,651, a tube striking device as well as a retracting device comprising a mass which is subjected to stroke up and down by means of steam or pressurized water. The impact tube is positioned to pass through a central opening of the pulp. The mass includes cylinders or the like to provide return and impact movements to the mass in both directions. The impact surfaces arranged in the mass meet the annular counterparts which are wedged to remain around the tube, whereby the impact of the mass is transmitted to the tube.

The disadvantage of the US 5,765,651 solution is the low power of the device, the small impact surfaces and the lack of proper mass control if the tube is gripped so that the tube does not exist to control the movement of the mass. The motion cylinder arrangement with its symmetrical movement in both directions gives the pulp a rather slow speed, since the cylinders must be supplied with water or steam through the valves throughout the movement. Thus, even the use of pressurized steam does not make the movement quick, since steam must be led through the valve to a cylinder having a pressure of *, · first, low due to the previous direction of movement. The oscillation of the device is also strong due to the symmetrical * t * colored movement of the mass back and forth. The rate of retraction is equal to * t '...' as the direction of impact. The return movement must be stopped without impact, and this causes vibrations that are difficult for the equipment. If the return movement is further slowed down by the valves, the stroke frequency will remain modest.

I | * »» ;; · To eliminate the above disadvantages, a new movable mass has been developed- * ♦ 1; 'An impactor suitable for impacting, pulling and pulling piles to the ground; It is possible to attach devices such as a breaker hammer and work with said tools. The device has a fast impact frequency and adjustable impact energy.

'; The impactor according to the invention is characterized in that the device comprises mass: movable motion cylinders by means of which the return movement of the mass can be effected by applying fluid pressure to the piston of said cylinders and by which the impact of the cylinders gas by the fluid pressure applied to the primary side to the desired pressure, whereby stroke movement is achieved by discharging the fluid pressure from the primary side of the cylinders and the impact energy of the mass is adjustable by the length of the

An advantage of the impact device according to the invention is that the impact energy is easily adjustable to the desired value. The adjustment can also be done remotely. Mass acceleration occurs optimally. No fluid is introduced into the cylinder causing the impact movement, so that the movement of the cylinder 10 becomes rapid when only high pressure gas is expelled during the impact movement. harmful vibrations of the device can be made small, while during the return movement of the cylinder piston is forced into the primary fluid pressure to press the power of the secondary gas space below and to raise its pressure. In the final stage of compression, the movement of the piston can easily be retarded by valve control, and the resulting retardation merely by the end of the return movement does not greatly increase the time taken for the return movement. Instead of the piles, various impacting tools are easily attached to the gripping members.

In the following, the invention will be explained in more detail with reference to the accompanying drawings, in which

Figure 1 is a side elevational view of a device striking a pile on the ground.

Figure 2 is a side elevational view of a device striking a pile up from the ground.

, ·. Figure 3 shows the increase in pressure on the secondary side of the cylinder as a function of piston movement.

> »; ·. Figure 4 shows a moving secondary mass inside a piston.

* »· T ·; Fig. 1 shows a percussion device attached to the head of the excavator boom, which is fitted by means of fastening means 12 belonging to the device. the cylinders being moved by it 8. One end of the cylinders is fixed to the beam 21 which connects the body 1 and the other ends to the mass 2. At one end of the mass 2 there is an impact surface 18 which strikes the impact surface 5. 30, which is tightened around a pile 7. The gripping device 6 can be opened and tightened, for example, by a hydraulic cylinder slide, whereby the change of grip on the pile, • disassembly and fastening can be easily performed from the cab.

A guide tube 9 is disposed between the parts 21 and 5 for controlling the reciprocal movement of the mass 2.

3,115,759

Pressure fluid is supplied to the primary side 20 of the cylinders along line 14 to raise the mass after impact. On the secondary side of the cylinders there is a gas filling against which the pressurized liquid then pushes the piston 16. The gas filling is e.g. nitrogen and is compressed at high pressure depending on the distance 5 the piston 16 passes. 17, the control unit is e.g. possible to determine in advance what pressure is limited to the primary-side pressure during the return movement of the mass when a certain pressure is created on the secondary side of the cylinders. The pressure can also be measured from the secondary side and transmitted to the control unit 17. From the valve assembly 13, the pressure fluid is passed along line 14 to the primary side 20. The control unit 17 controls the bypass valve 13 located in line 14 to open and mass exits downward. In this case, the remote control via the control unit 17 adjusts the stroke length by means of line pressure control or pressure measured from the secondary side.

At the attachment point of the piston rod of the cylinder 8 there is e.g. a permanent magnet 11 and an proximity sensor 10 on the inside of the body 1, whereby the position detection of the mass can be identified by means of their position detection. The position information is transmitted to the control unit 17. The control unit 17 is used to select how far (distance s) the mass 2 is to be returned for impact. The shock producing pressure on the secondary side of the cylinder 8 is determined by the length of the return path s. 3, the pressure P on the secondary side increases with distance s. The pre-fill pressure (e.g. nitrogen) on the secondary side is Pe. The desired impact energy is obtained by determining the extent to which the pulp 2 is recovered by means of a pressurized fluid applied along line 14. Or vice versa, to which i .. pressure value is allowed the pressure of the pressurized fluid supplied to the primary side 20 to rise before the mass return movement is stopped. In order to effect a blow, 20 pressure valves are opened from the primary side. · · · * Tea exit, wherein the secondary gas pressure pushes the piston 16 abruptly and when the piston rod out of the mass 2 moves the same distance. The impact energy E is S

E = _5 ~ A / (s) ds where A is the piston cross-section. (Anti-primary-side pressure is not 0 in formula are not taken into account.):.:: Given the initial pressure Pe may be desired to provide a iskunergia calculated for tissue '·. Using the function of vion 3, at which value of distance S it is realized and set to return path S.

....: 17, the control unit is detected and processed by means of mass 2 from the position 10, the sensor 11 and pressure sensor 14 in the line pressure which is input to the primary side 20 corresponding to the pressure and the secondary pressure, when there is a stroke movement of the case. From line 14, the prevailing pre-pressure on the secondary side can also be checked.

The simplest adjustment of the stroke length s (= stroke energy) is by moving the sensor 10 on the surface 1 of the body 5. When the magnet 11 is in place, the valve 13 changes direction. However, it is preferable to use a position recognition array where the sensors are not moved. Herein, the sensor and observation arrangement is selected such that the sensor 10 can detect to unit 17 the distances of part 11 to the sensor 10 throughout the relevant travel. Induction transducers, proximity transducers or other transducer transducers known as position 10 may be used.

Alternatively, the primary side or the secondary side fluid pressure is identified and when the set pressure is reached, the unit 17 sends a control pulse to the valve 13 to change the flow direction of the stroke. The pressure value is preferably adjustable remotely from the cab, so that the is-15's amount of energy can be easily selected for the particular situation.

In Figure 2, the impactor is mounted in an alternative manner, i.e. rotated 180 °, e.g. in the excavator boom, whereby the device pulls the piles up from the ground. So that's how it works out. . with one gripper piece 5 and a gripper assembly 6. With the excavator boom it is possible to: · ϊ 'maintain the bias upwards in the pile by raising the boom with the boom ·; ·. with day force up all the time. Similarly, the bias is maintained downwards. · · ·. when piles hit the ground. The prestressing force is transmitted through the damping gums 3,4 and its size must be limited to avoid breaking the gums.

5 In order to enhance the shocks, a movable mass 17 can be arranged inside mass 2 and: '· | Motion space greater than the volume required by mass 17. Mass 17 has, for example, travel d, '' ': after passing it collides with the end of its space. This collision occurs with a small fraction; , · With # municipal delay of collision of mass 2 with counterpart 5. Double stroke enhances mass «· *. · · ·. shock effect. The pulp 17 may be in solid form, liquid or heavy granulate.

• I

.. i A double stroke occurs when the device is striking both down and up.

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In Figs. 1 and 2, the cylinders 8 are outside the pulp, they may also be closer to the guide tube 9 and attached at one end to the end of the pulp 2. In this case, the device becomes clearly smaller in diameter, if the frame 1 is e.g. However, the height of the structure increases slightly.

Claims (7)

1. A type producing device consisting of a frame (1), Iran which frame the device can be attached to, for example, in a working machine, a piece (5) connected to the frame which receives blows from moving and striking mass (2) and transmits the blows to a striking pile (7) striking the earth (7) or corresponding tool or in a device coupled to the ground, wherein between the piece (5) and the pile (7) or the tool is fitted a holding tool (6) with which the pile (7) is gripped. ) surface or tool and in which device the transmitting piece (5) and striking mass (2) are annular and the striking pawl (7) is arranged to pass through said annular parts, characterized in that the device belongs to moving cylinders (8) relating to the pulp (2), with which the pulp return thread can be realized by conducting, Pressure fluid to act on pistons (16) lying in said cylinders in the primary side of the cylinders: v. (20) and by means of which the cylindrical movement of the pulp (2) can be realized by. ·: ·, Press in the secondary side of said cylinders (8) lying gas to the desired pressure by means of tili. primary side guided pressure fluid, whereby stroke movement can be effected by diverting pressure fluid out of the primary side of the cylinders and the impact energy of the pulp (2) is adjusted by means of: "length (s) of the return thread of the pulp (2) or by means of pressure increase. that the return thread causes in the primary or secondary side of the cylinder .. : '; 2. A type producing device according to claim 1, characterized in that the cylinders; ·, ·. (8) is attached to the pulp (2) by one end thereof. 30 '. A type producing device according to claim 1, characterized in that in the pulp (2); is coupled an auxiliary mass (17) which can move with respect to the mass (2), the impact of which in the paragraph (5) occurs due to the distance (d) after a delay in the impact of the mass (2). 115759 1. Iskuja synnyttävä laite, joka käsittää rungon (1), josta laite on kiinnitettävissä esim. työ-5 konueseen, runkoon (1) liitetyn iskuja velittävän kappaleen (5), joka ottaa vastaan liikkuvan ja iskevän mass (2) iskut ja velittää iskut maahan iskettävälle tai maasta ylös vedettävälle paalulle (7) tai vastaavlaen (5) ja paalun (7) tai työkalun velille on sovitettu kiinnipito laite (6), jolla tartutaan paaluun (7) tai työkaluun ja jossa laitteessa iskuja velittävä kappale (5) ja iskevä mass (2) ovat purified-10 maiset ja iskettä 7 avulla massan (2) iskuliike on toteutettavissa puristamalla mainittujen sylinterien (8) toisiopuo-lella olevaa kaasua ensi puolelle (20) johdetun nestepaineen avulla haluttuun paineeseen, jolloin iskuliike on aikaansaatavissa purkamalla nestepaine sylinterien ensiöpuolelta (20) yes mass (2) on iskuenergia säädettävissä mass (2) paluuliikkeen pituuden (s) tai siitä sylinterin ensiö- tai toisiopuolelle aiheutuvan paineennousun avulla. , 20 2. Patenttivaatimuksen 1 mukainen iskuja synnyttävä laite tunnettu siitä, etä sylin- • «» »· * · ... terit (8) ovat toisesta päästään kiinnitetty massaan (2). • t t <· • 1 · t · .. 3. Patenttivaatimuksen 1 mukainen iskuja synnyttävä laite tunnettu siitä, että mas- * ·. ·,; saan (2) on yhdistetty massan (2) suhteen liikkuvaksi järjestetty lisämassa (17), young isku- • i «• | . · ·. 25 vaikutus kappaleeseen (5) tapahtuu matkan (d) johdosta viiveellä mass (2) iskuun the net. • · • 1 1 j V. 4. Patenttivaatimuksen 1 mukainen iskuja synnyttävä laite tunnettu siitä, etä laite »,: '' '· on käännettävissä 180 ° paalujen (7) sekä iskemiseksi maahan ett poisvetämiseksi maasta. 5 . 115759 4. A type producing device according to claim 1, characterized in that the device can be turned 180 ° bed for striking piles (7) in the ground and for peel-off from the ground. 5. A type producing device according to claim 1, characterized in that the device includes a control unit (17), by means of which the impact energy of the pulp (2) can be adjusted remotely. A type producing device according to claim 1, characterized in that the device 10 includes a pipe (9) which passes through the center opening of the pulp (2) and controls the movement of the pulp (2). 6. The patent waiver 1 mukainen iskuja synnyttävä laite tunnettu siitä, etä laitteeseen kuuluu mass (2) keskiaukon kautta kulkeva mass (2) liikettä ohjaava putki (9). 7. Patent Tivaatimuksen 1 mukainen iskuja synnyttävä laite tunnettu siitä, etä kappa leeseen (5) on järjestettävissä esijännitysvoima iskusuuntaan työkoneen tai vastaavan avulla iskulaitetta painamalla / nostamalla. 10 Stroke producing device according to claim 1, characterized in that a biasing force can be provided in the direction of stroke by pressing / lifting the stroke device by means of a working machine or the like. 15 20> »1» »