EP3600767B1 - Installation et procédé de découpe par jet d'eau chargée d'abrasif en suspension - Google Patents

Installation et procédé de découpe par jet d'eau chargée d'abrasif en suspension Download PDF

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Publication number
EP3600767B1
EP3600767B1 EP17717102.2A EP17717102A EP3600767B1 EP 3600767 B1 EP3600767 B1 EP 3600767B1 EP 17717102 A EP17717102 A EP 17717102A EP 3600767 B1 EP3600767 B1 EP 3600767B1
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EP
European Patent Office
Prior art keywords
pressure
valve
lock chamber
abrasive
pump
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Application number
EP17717102.2A
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German (de)
English (en)
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EP3600767A1 (fr
Inventor
Marco Linde
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ANT Applied New Technologies AG
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ANT Applied New Technologies AG
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Priority to PL17717102T priority Critical patent/PL3600767T3/pl
Publication of EP3600767A1 publication Critical patent/EP3600767A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the present disclosure relates to a water-abrasive suspension cutting system with the features specified in the preamble of claim 1 and a method for water-abrasive suspension cutting.
  • a system according to the preamble of claim 1 is from the document EP 1 208 944 A known, and a method for water-abrasive suspension cutting with the steps: providing water under high pressure in a high pressure line by means of a high pressure source, providing a high pressure abrasive suspension in a pressure vessel, cutting a material by means of a high pressure jet, which at least partially Contains abrasive suspension, with removal of the abrasive suspension from the pressure vessel.
  • Water-abrasive suspension cutting systems are used to cut materials by means of a high-pressure water jet to which an abrasive has been added.
  • Water-abrasive suspension cutting systems are to be differentiated from water-abrasive injection cutting systems, in which the abrasive is only introduced into the already very strongly accelerated water in or at an outlet nozzle.
  • the high-pressure water is first mixed with the abrasive and then the water-abrasive suspension is accelerated in the outlet nozzle.
  • the abrasive-water ratio can be selected to be higher and a higher cutting force can be achieved because the water is mixed with the abrasive in a controlled manner under high pressure upstream of the outlet gland without air inclusions.
  • part of the water flow can be passed through an abrasive container which is designed as a pressure container.
  • abrasive container which is designed as a pressure container.
  • Such a system is z. B. from the EP 1 199 136 known.
  • a technical challenge with these systems is the refilling of the abrasive, since the system has to be taken out of operation, the abrasive container has to be depressurized and only then can it be filled.
  • continuous cutting is often desired, in which the system does not have to be taken out of operation for filling the abrasive.
  • the EP 2 755 802 B1 and WO 2015/149867 A1 describe lock solutions to ensure continuous operation of the system. Due to the particularly high pressures of over 2,000 bar in some cases, the cyclical pressure and release of pressure in a lock chamber is a technical challenge. Filling the lock chamber leads to blockages and time-consuming filling cycles in the previously known systems and in the previously known methods.
  • high pressure is intended to mean a pressure above 100 bar and “low pressure” a pressure below 100 bar.
  • the low pressure is preferably the ambient air pressure.
  • the lockable pump is preferably not exposed to high pressure and can therefore be designed in the form of a diaphragm pump for low pressure.
  • the pump is as fluidly connected as possible to an area of the lock chamber in which there is less abrasive, for example an upper side area of the lock chamber, the pumped water can contain abrasive, which promotes pump wear. If the pump were exposed to high pressure, this pump wear would be many times higher.
  • a pump shut-off valve is arranged between the pump and the lock chamber, which is preferably a needle valve which is preferably designed to be flushable.
  • the needle valve can be shut off pneumatically via a pressure plate.
  • the needle can be arranged coaxially to a high pressure inlet and opposite this in order to press sealingly on a valve seat at the high pressure inlet.
  • a flushing inlet can lead to the side of the valve seat opposite a low-pressure outlet so that a flow of flushing agent can run from the flushing inlet via the valve seat to the low-pressure outlet in order to clean the valve seat and the needle tip of abrasive residues, preferably before closing the valve.
  • the pump can optionally be connected on the pressure side to a refill funnel, which is fluidly connected on the output side to an input side of the filling valve.
  • the refill funnel is preferably arranged above the filling valve so that abrasive can sink through the filling valve into the lock chamber with the aid of gravity.
  • the pump can push, support and / or accelerate this vertical flow of abrasive by means of a negative pressure generated by it at least temporarily in the lock chamber.
  • the water displaced by the abrasive and pumped out of the lock chamber by the pump can be fed back to the refill funnel via the circuit. If the refill funnel is closed at least during the filling of the lock chamber, the pump can generate a corresponding overpressure in the refill funnel with the pressure on the outlet side and thus increase the pressure difference between the refill funnel and the lock chamber, which can accelerate the flow through the fill valve.
  • the pump can be fluidly connected to an upper area of the lock chamber on the suction side in a lockable manner in order to convey only clear water without abrasives if possible.
  • a filter or separator can also be provided in order to minimize the load on the pump with abrasives. Since the abrasive flowing into the lock chamber settles in the form of a cone in the lower area up to a certain filling level, a connection to the pump is preferably arranged laterally at the top, where there is as little abrasive as possible. It can Baffles or baffle plates can be provided in the lock chamber in order to avoid suction of abrasive to the pump as far as possible.
  • the pump can be a membrane pump, which only needs to be designed for operation in low pressure.
  • the lock chamber can optionally be pressure-relieved via a pressure relief valve in the form of a flushable needle valve. Similar to the pump shut-off valve, the pressure relief valve wears less and closes better if it is designed to be flushable. In contrast to the pump shut-off valve, however, the pressure relief valve must open while there is high pressure at a high pressure inlet of the valve. It is therefore advantageous if the pressure relief valve has a check valve at a flushing inlet so that the high pressure cannot discharge into the flushing inlet, but only into a low-pressure outlet, which can be fluidly connected to an outlet.
  • the pump can be shut off from the lock chamber using a pump shut-off valve in the form of a needle valve.
  • a pump shut-off valve in the form of a needle valve.
  • the valve wear and the tightness of the valve can be improved by a further step of flushing this pump shut-off valve, which preferably takes place shortly before the shut-off when the valve is open.
  • the filling, blocking, printing and refilling can take place one after the other and cyclically during the continuous cutting.
  • the pressure in the lock chamber is relieved from high pressure to low pressure. This is preferably done via a pressure relief valve in the form of a flushable needle valve in a drain.
  • a water-abrasive suspension cutting system is provided with a high pressure source for providing water under high pressure, a high pressure line connected to the high pressure source, a pressure vessel for providing a pressurized water Abrasive medium suspension, a lock chamber with a pressure inlet, and a filling valve for refilling abrasive via the lock chamber into the pressure vessel.
  • the system also has a pressure accumulator, which is connected to the pressure inlet of the lock chamber in such a way that it can be shut off, the pressure accumulator being designed to discharge pressure into the lock chamber.
  • the energy required to pressurize the lock chamber can, for example, be taken from the pressurized lock chamber while the pressureless lock chamber is being filled with abrasive or water-abrasive suspension and / or the pressure vessel is refilled by loading the pressure accumulator relatively slowly using a throttle in the high-pressure line.
  • the amplitude of the pressure drop in the high pressure line can thus be reduced to a level at which the cutting performance remains essentially unaffected.
  • Printing on the lock chamber does not have to be done completely by unloading the pressure from the pressure accumulator, but can only contribute 40% or 50% to the printing by means of an initial pressure pulse from the pressure accumulator into the lock chamber, for example.
  • the rest of the printing can be carried out at the same time or at different times via the high pressure line.
  • the pressure accumulator can have a pressure accumulator unit or a plurality of pressure accumulator units which are connected in parallel or in series.
  • the pressure accumulator can be connected to the high pressure line via at least one throttle and can be pressurized via the at least one throttle.
  • the pressure loading can follow directly after the printing of the lock chamber or it can take place with a time delay.
  • a shut-off valve can be provided to shut off the pressure accumulator after the pressure has been discharged so that the lock chamber can initially experience residual pressure from the high-pressure line without loading the high-pressure line at the same time as pressure loading the pressure accumulator. This further reduces the amplitude of the pressure drop in the high pressure line.
  • the printing inlet can be arranged in a lower area of the lock chamber.
  • the printing inlet is below the abrasive level when the lock chamber is filled with abrasive.
  • a pressure surge introduced through the pressure input which is preferably generated by the pressure discharge of the pressure accumulator, can thus loosen and stir up any abrasive agent located in the lock chamber. Subsequent refilling of the pressure vessel from the lock chamber with abrasive occurs faster after such loosening or whirling up.
  • the pressure input can be connected to the high-pressure line in a shut-off manner via at least one throttle.
  • the lock chamber can be at least partially pressurized via the high pressure line in order not to have to design the pressure accumulator too large or with too many pressure accumulator units.
  • a pressure drop in the high-pressure line can indeed be tolerated without the cutting performance being significantly impaired.
  • the extraction of energy from the high-pressure line is slowed down via the at least one throttle and it is ensured that the amplitude of the pressure drop does not exceed a certain level.
  • a balance of interests is preferably made between the speed of the printing and the maximum pressure drop in the high-pressure line, whereby it has been found that it is advantageous to generate about 40% of the pressure in the lock chamber quickly from the pressure discharge of the pressure accumulator and the rest slowly from the high pressure line.
  • the printing process to the full printing height in the lock chamber can then take, for example, 5 to 10 seconds.
  • the lock chamber can be printed during a first time window by depressurizing the pressure accumulator and during a second time window via at least one throttle from the High-pressure line, wherein the first and the second time window at least partially overlap.
  • Both time windows preferably begin at the same time, in that a first shut-off valve is opened downstream from the pressure accumulator and from the high-pressure line and upstream from the pressure inlet. Downstream of the at least one throttle, the high pressure line and an outlet of the pressure accumulator can be brought together, so that both the pressure accumulator and the high pressure line can pressurize the lock chamber when the first shut-off valve is open. Because of the upstream throttle, however, the first time window is significantly shorter than the second time window. A pressure pulse for loosening the abrasive can thus be introduced into the lock chamber through the pressure discharge of the pressure accumulator, without generating a pressure drop in the high-pressure line which adversely affects the cutting performance.
  • a second shut-off valve can be arranged between an outlet of the pressure accumulator and the high-pressure line downstream of the at least one throttle.
  • the pressure loading of the pressure accumulator can be delayed after a pressure discharge process in order not to load the high-pressure line during the rest of the pressure on the lock chamber.
  • the pressure loading of the pressure accumulator could begin immediately at a reversal point at which a loading pressure just exceeds the unloading pressure.
  • the pressure accumulator can optionally be a spring accumulator or a bladder accumulator.
  • the method can have a further step of pressure loading the pressure accumulator via at least one throttle from the high pressure line.
  • An additional high pressure source can thus be dispensed with.
  • the method can include at least partial printing of the lock chamber via at least one throttle from the high-pressure line.
  • This step can at least partially overlap with the step of at least partially printing the lock chamber by depressurizing the pressure accumulator, and preferably begin at the same time as this, but preferably end later than this.
  • the pressure accumulator can thus be designed to be smaller or with fewer pressure accumulator units than if the entire pressure of the lock chamber were fed from the pressure accumulator.
  • the lock chamber can be printed by unloading the pressure of the accumulator and / or at least partially printing the lock chamber via at least one throttle from the High-pressure line take place in such a way that abrasive material located in the lock chamber is loosened by a pressure surge.
  • the subsequent step of refilling the pressure vessel with abrasive from the lock chamber can take place more quickly.
  • the lock chamber can be printed by unloading the pressure of the pressure accumulator and / or the lock chamber can be printed from the high pressure line into a lower area of the lock chamber. Since the abrasive sinks into the lower area of the lock chamber due to gravity, this ensures that the abrasive is loosened by a pressure surge. In addition, the risk of clumping is greatest in the preferably narrowed lower area of the lock chamber, which leads to the refill valve preferably arranged below.
  • the lock chamber can be printed by unloading a pressure accumulator during a first time window and the lock chamber can be printed from the high-pressure line during a second time window, the first and second time windows at least partially overlapping.
  • the lock chamber can be shut off from the pressure accumulator and / or the at least one high-pressure line during filling and refilling. This time can be used in particular for pressure loading the pressure accumulator.
  • the pressure accumulator can be pressure-loaded via at least one throttle at least so quickly that the pressure accumulator is pressure-loaded again before the next printing step, and at least so slowly that the amplitude of the pressure drop in the high-pressure line caused by the pressure loading does not significantly impair the cutting performance.
  • energy can optionally be stored in the pressure accumulator via spring or fluid compression.
  • filling, printing and refilling can run cyclically while cutting can be carried out continuously.
  • the pressure accumulator can first be shut off by depressurizing the pressure accumulator from the high pressure line, the pressure accumulator from the high pressure line only being pressurized again when the lock chamber has been at least partially pressurized via at least one throttle from the high pressure line.
  • the water-abrasive-suspension cutting system 1 shown has a high-pressure source 3 which provides water in a high-pressure line 5 at a high pressure po of approximately 1,500 to 4,000 bar.
  • the high pressure line 5 is connected to an outlet nozzle 7, from which the high pressure water emerges in a jet 9 at a very high speed. So that the jet 9 can be used effectively as a cutting jet for cutting material, the high-pressure line 5 is branched in such a way that at least part of the flow through the high-pressure line 5 is guided through a pressure vessel 11 in which a water-abrasive suspension 13 is located .
  • the supply of the water-abrasive agent suspension 13 to the outlet nozzle can be switched on and off via a shut-off valve 15.
  • the proportion of the water / abrasive agent suspension 13 in the jet 9 can be adjusted via a throttle 17 by throttling the flow rate in the secondary branch of the high pressure line 5 that is guided through the pressure vessel 11.
  • the throttle 17 can be configured statically, for example in the form of a perforated diaphragm, or adjustable or controllable.
  • the throttle 17 is preferably adjustable, so that the throttle 17 can, if necessary, also completely shut off the flow into the pressure vessel 11, so that the shut-off valve 15 can be dispensed with.
  • the throttle 17 is preferably controllable, with a signal characteristic of the abrasive agent withdrawal flow coming from a sensor or an available operating parameter can be obtained, is used as a control variable for regulating the opening of the throttle 17 (see Figures 7a-c ).
  • a refill valve 19 in the form of a ball valve is arranged above the pressure vessel 11.
  • the refill valve 19 connects a lock chamber 21 arranged above the refill valve 19 to the pressure vessel 11.
  • a filling valve 23 is in turn arranged above the lock chamber 21, which connects a refill funnel 25 arranged above the lock chamber 21 to the lock chamber 21.
  • the filling valve 23 can be designed essentially identically to the refilling valve 19 in the form of a ball valve.
  • the refill funnel 25 is not under pressure, so that dry, moist or wet abrasive or a water-abrasive suspension can be filled in from above (see Figures 8-12 ). This can at least partially be an abrasive recycled from the cutting jet 9, which is transported via a conveying device (see Figures 8-12 ) can be filled into the refill funnel 25 from above in dry, wet, frozen, pelleted or suspended form.
  • the lock chamber 21 can be temporarily depressurized. For example, a pressure in the lock chamber 21 can be released into an outlet 29 via a pressure release valve 27 in the form of a needle valve.
  • the filling valve 23 can be opened so that abrasive material falls from the refill funnel 25 into the lock chamber 21.
  • This gravity-related filling of the lock chamber 21 with abrasive can be supported and accelerated by a pump 31.
  • the pump 31 can be connected to the suction side Lock chamber 21 and on the pressure side with the refill funnel 25. The pump 31 can thus suck abrasives into the lock chamber 21. This is particularly useful when the abrasive becomes clogged in the tapered lower area of the refill funnel 25 or at the fill valve 23.
  • the pump 31 does not have to be designed for high pressure, it is advantageous if the pump 31 can be shut off from the lock chamber 21 by means of a pump shut-off valve 33 in the form of a needle valve.
  • the pump shut-off valve 33 can be designed to be flushable in order to flush the valve seat and the valve body, for example in the form of a valve needle, free of abrasive (see FIG Figures 19a-b ). This ensures, on the one hand, that the pump shut-off valve 33 closes tightly and reduces material wear in the valve.
  • the pump 31 can be largely protected from abrasives by means of an upstream filter and / or separator (both not shown).
  • the pump shut-off valve 33 is only opened when the lock chamber 21 is already depressurized. Therefore, for the pump shut-off valve 33, a first embodiment of the needle valve according to FIG Figure 19a can be used in which a side flush inlet and an opposing side flush outlet are provided.
  • the second embodiment of the needle valve is shown in FIG Figure 19b more advantageous in which a check valve is provided at the flushing inlet. Since the pressure release valve 27 is opened at high pressure, the check valve prevents pressure release in the direction of the flushing inlet.
  • the flush outlet can open into the outlet 29, so that both the pressure release and the flushing agent outlet take place exclusively towards the outlet 29 and not towards the flush inlet.
  • the lock chamber 21 has a printing input 35 in a lower area, via which the lock chamber 21 can be printed.
  • the printing input 35 is in the exemplary embodiment Fig. 1 Can be shut off via a pressure valve 37 in the form of a needle valve to a pressure accumulator 39 and connected to the high pressure line 5 via throttles 41, 42.
  • the pressure accumulator 39 has two pressure accumulator units in the form of spring accumulators, which are connected in parallel to the inlet of the pressure valve 37.
  • the pressure accumulator 39 is connected to the high pressure line 5 via the throttle 41.
  • the throttles 41, 42 can be configured statically, for example in the form of perforated diaphragms, or adjustable or controllable. If the throttles 41, 42 are adjustable up to a degree at which the connection between the high pressure line 5 and the printing inlet 35 can be completely shut off, the printing valve 37 can possibly be dispensed with.
  • the pressure accumulator 39 is fully pressurized before the lock chamber 21 is printed. As soon as the pressure valve 37 is opened, the pressure accumulator 39 is pressure released into the lock chamber 21 and thus quickly prints it to about 40% of the high pressure po that is provided in the high pressure line 5 as a nominal high pressure from the high pressure source 3.
  • the pressure accumulator 39 is immediately reloaded from the moment in which it has been depressurized.
  • the high pressure line 5 prints both the lock chamber 21 with the residual pressure and the pressure accumulator 39. This is particularly advantageous when the pressure loading of the pressure accumulator 39 is so time-consuming that the refill passage rate depends on the pressure loading time of the pressure accumulator 39.
  • the pressure accumulator 39 can be shut off with a pressure accumulator valve 43 in the form of a needle valve.
  • the pressure accumulator valve 43 can be shut off in order not to additionally load the high pressure line 5 with the pressure loading of the pressure accumulator 39 during the pressure on the lock chamber 21.
  • Such a load could cause a pressure drop in the high pressure line 5, which could have a negative influence on the cutting performance at the outlet nozzle 7. It is therefore advantageous not to open the pressure accumulator valve 43 until the lock chamber 21 is completely pressurized and the pressure valve 37 is closed so that the pressure accumulator 39 can be pressurized from the high pressure line 5 via the throttle 41.
  • the pressure loading of the pressure accumulator 39 is not so time-consuming that the refill passage rate depends on the pressure loading time of the pressure accumulator 39.
  • the filling of the lock chamber 21 and the refilling of the pressure vessel 11 can usually take longer than the pressure loading of the pressure accumulator 39.
  • the throttle 41 can be set so that the printing of the pressure accumulator 39 is as slow as possible, but fast enough so that before the next passage for printing on the lock chamber 21, the pressure accumulator 39 is completely pressurized.
  • the pressure accumulator 39 is completely dispensed with and the lock chamber 21 is exclusively printed via the throttle 41 from the high-pressure line 5.
  • the high pressure source 3 can react so quickly to an initial pressure drop, for example via a servo pump control, and can adjust the pump output accordingly quickly, so that there is no large amplitude of a pressure drop in the first place.
  • An initial pressure drop can be communicated to the high pressure source 3 via pressure sensors, so that the high pressure source 3 can quickly counteract a further pressure drop with an increase in output or an increase in speed.
  • the initial pressure drop can already be mitigated via the throttle 41, so that at no point in time does a pressure drop occur that would significantly impair the cutting performance.
  • a conveying aid 45 for example in the form of a pump, is preferably provided, which is connected to the pressure vessel 11 on the suction side and to the lock chamber 21 on the pressure side.
  • the conveying aid 45 supports or generates the flow of abrasive medium from the lock chamber 21 down into the pressure vessel 11. It can prevent or loosen blockages of abrasive medium and accelerate the refilling process which is caused or supported by gravity.
  • the delivery aid 45 on the pressure vessel 11 works with water at the nominal high pressure po.
  • a conveying aid shut-off valve 47 is between the Conveying aid 45 and the lock chamber 21, the conveying aid shut-off valve 47 in the form of a needle valve being able to shut off the pump 47 from the lock chamber 21 if the lock chamber 21 is not or not completely printed.
  • the conveying aid shut-off valve 47 is preferably a flushable needle valve according to FIG Figure 19b with a check valve at the flush inlet, as it is actuated under high pressure.
  • Figures 6a-c show various alternative embodiments for the conveying aid 45.
  • the conveying aid 45 can, for example, have an impeller driven from the outside via a shaft (see FIG Figure 6a ) or an inductively driven impeller (see Figure 6b ).
  • the delivery aid 45 can also support the refilling of abrasive into the pressure vessel 11 via a piston stroke (see FIG Figure 6c ).
  • the delivery aid 45 can pump or deliver continuously or limited in time or pulsed. It may be sufficient if the flow of abrasive into the pressure vessel 11 is only supported initially and then continues to run quickly enough with the aid of gravity alone. As an alternative or in addition, the flow of abrasive into the pressure vessel 11 can be supported or generated continuously.
  • the refill valve 19 In addition to an upper valve inlet 49 and a lower valve outlet 51, the refill valve 19 also has a lateral pressure inlet 53.
  • a valve chamber in which a movable valve body is located can be printed via the pressure inlet 53. Without pressure on the valve chamber, when the system is started up, the very high pressures on the valve inlet 49 and the valve outlet 51 press the valve body so strongly into the valve seat that the valve body can no longer be moved.
  • a pressure equalization can be established in the refill valve 19 via the lateral pressure inlet 53, so that the valve body is movable after being put into operation.
  • a flush for the refill valve 19 is provided.
  • a flushing source 55 can be connected to the pressure inlet 53 such that it can be shut off (see FIG Fig. 4 ).
  • Three flushing valves 57, 59, 61 are preferably provided to enable flushing to be switched on and off or to be disconnected from the high pressure.
  • a first flushing valve 57 in the form of a needle valve is arranged between the delivery aid 45 and the pressure inlet 53.
  • a second flush valve 59 also referred to here as a flush outlet valve 59, is arranged in the form of a needle valve between a lateral flush outlet 63 and an outlet 65.
  • a third flush valve 61 in the form of a needle valve is arranged between the flush source 55 and the pressure inlet 53.
  • the refill valve 19 is preferably closed.
  • the first flushing valve 57 is also closed so that pressure can be released from the pressure inlet 53 without releasing the pressure on the delivery aid 45.
  • the second flush valve 59 is opened towards the outlet 65 so that any high pressure that may exist can be drained from the valve chamber. If the third flushing valve 61 is now opened, then water or a water-flushing agent mixture flows through the valve chamber to the outlet 65 and thus flushes it free of abrasive residues.
  • the flushing of the refill valve 19 is preferably carried out as a service procedure when the system 1 is completely depressurized in order to be able to completely flush out the valve chamber and, if necessary, to be able to move the valve body.
  • a flushing inlet 66 is provided separately from the pressure inlet 53 (see also Figures 15a-b and 17a-b ).
  • the pressure inlet 53 can be arranged coaxially to a servomotor shaft 86 and opposite this, wherein the flushing inlet 66 and the Flush outlet 63 can be arranged transversely to the servomotor shaft 86 coaxially to one another and on opposite sides.
  • the flushing is ended again by closing the three flushing valves 57, 59, 61 in the reverse order, i.e. the third flushing valve 61 is initially closed so that the flushing flow is stopped.
  • the second flush valve 59 is then closed in order to close off the valve space from the outlet 65.
  • the first flush valve 57 can be opened so that the valve chamber is pressurized with high pressure.
  • Printing on the valve chamber is advantageous because a valve body in the refill valve 19 can be pressed so hard into a valve seat by the high pressure difference between the valve outlet 51 or valve inlet 49 and the valve chamber that it can no longer be moved.
  • the pressure on the valve chamber creates a pressure compensation so that the valve body in the refill valve 19 remains movable.
  • a branch of the high pressure line 5 is led through the pressure vessel 11 filled with abrasive suspension 13.
  • An extraction point 68 located in the lower region of the pressure vessel 11 is connected to the outlet nozzle 7 via an abrasive line 70, and a branch of the high pressure line 5 is led into an upper region of the pressure vessel 11 via a control valve or adjustable throttle 17.
  • the abrasive line is brought together again with the high pressure line 5 in front of the outlet nozzle 7 so that the cutting jet contains, for example, abrasive suspension and water in a mixing ratio of 1: 9.
  • the mixing ratio can be regulated via the throttle or control valve 17 connected to the pressure vessel 11 on the inlet side.
  • the control valve 17 When the control valve 17 is in the maximum open position, the abrasive agent withdrawal flow and the mixing ratio are maximum maximum.
  • the minimum open or closed position see Fig. 7b or 7c ) of the control valve 17, the abrasive removal flow is minimal or zero and the mixing ratio is correspondingly low or the cutting jet 9 then contains only water.
  • a certain mixing ratio can be optimal for cutting certain materials, workpieces or workpiece sections, in which only as much abrasive as necessary is removed to achieve the cutting performance.
  • the cutting performance can be adjusted via the mixing ratio during cutting.
  • the refilling of the pressure vessel 11 with abrasive can be controlled according to the abrasive removal flow so that there is always enough abrasive suspension 13 in the pressure vessel 11 for continuous cutting.
  • four different levels of abrasive in the pressure vessel 11 are indicated by dashed cones.
  • Two further fill level cones F 1 and F 2 are shown between a maximum fill level cone F max and a minimum fill level cone F min , where F max > F 1 > F 2 > F min . It should be pointed out again at this point that the entire system 1 and in particular the pressure vessel 11 are completely free of air. This means that the level cones are in highly pressurized water.
  • the maximum fill level cone F max is defined by the fact that if the pressure vessel 11 is further refilled with abrasive, a back pressure into the refill valve 19 would result.
  • the minimum fill level cone F min is defined by the fact that, with further abrasive removal, the abrasive content of the abrasive suspension in the abrasive line 70 on the outlet side would decrease.
  • level sensors 72, 74, 76 can be arranged on the pressure vessel 11 in order to signal that a level cone has been reached.
  • the filling level sensors 72, 74, 76 can be, for example, ultrasonic sensors, optical sensors or barriers, electromagnetic sensors or sensors of another type.
  • the level sensors 72, 74, 76 are ultrasonic sensors which can signal that a level cone has been reached via a change in the structure-borne noise.
  • An upper fill level sensor 72 can, for example, signal that the fill level cone F 1 has been reached and start a timer or define a point in time t 1 .
  • a lower filling level sensor 74 can, for example, signal that the filling level cone F 2 has been reached and stop a timer after ⁇ t or define a point in time t 2 .
  • an average abrasive agent withdrawal flow can be determined as ⁇ V / ⁇ t or ⁇ V / (t 2 -t 1 ).
  • the third lowermost filling level sensor 76 can signal the minimum filling level cone F min and immediately shut off the shut-off valve 15 in order to prevent the pressure vessel 11 from being sucked empty.
  • FIG. 7b Other operating parameters such as the pump speed of the high pressure source 3 can also be used as a control variable for the control valve 17 to determine the abrasive agent withdrawal flow and its control.
  • the abrasive flow or the mixing ratio can also be determined by means of a corresponding sensor 79 on the abrasive line 70 or in front of the outlet nozzle 7 and used as a control variable for the control valve 17.
  • the fill level sensors 72, 74 can also be used to control or clock the refill cycles.
  • a filling of the lock chamber 21 can fit above the upper filling level sensor 72 between the filling level cone F 1 and the maximum filling level cone F max . If the filling level cone falls below F 1 , the upper filling level sensor 72 can trigger a filling of the lock chamber 21 so that it is completely filled when the lower level sensor 74 signals the level cone F 2 and can thus trigger refilling from the filled lock chamber 21 into the pressure vessel 11. This prevents the fill level cone from dropping to the minimum fill level cone F min .
  • At least one filling of the lock chamber 21 can also fit as a buffer between the minimum filling level cone F min and the filling level cone F 2 .
  • the lock chamber 21 can automatically be filled again immediately as soon as the refilling of the pressure vessel 11 has ended. Refilling from the lock chamber 21 then only needs to be triggered at the filling level cone F 2 .
  • the vertical distance between the upper level sensor 72 and the lower level sensor 74 can be selected to be relatively short, for example so short that a drop between F 1 and F 2 takes less than a filling process of the lock chamber 21. With a shorter vertical distance, the average abrasive removal flow ⁇ V / ⁇ t or ⁇ V / (t 2 -t 1 ) can be determined more frequently and thus more accurately reflect the current abrasive agent withdrawal flow dV / dt.
  • Figures 8 to 12 show various possibilities of adding abrasives in dry, wet, moist, suspended, frozen, pelletized or other form into the refill funnel 25 or directly into the filling valve 23.
  • a pre-loading container 78 is provided, from which abrasive suspension is conveyed into the refill funnel 25 by means of a pump 80.
  • water can run off via an overflow 82 on the refill funnel, which water is displaced by the sinking abrasive.
  • a pre-loading container 78 is provided, from which dry powdery or moist lumpy abrasive is conveyed into the refill funnel 25 by means of a screw conveyor 84 and / or a conveyor belt 85.
  • a screw conveyor 84 and / or a conveyor belt 85 Via the overflow 82 on the refill funnel 25 can also here, when the refill funnel is loaded, water runs off, which is displaced by the sinking abrasive.
  • the abrasive can for example be recovered from the waste water of the cutting jet 9 after a cutting process and processed so that it can be used for a further cutting process.
  • the advantage of this system compared to known water-abrasive injection cutting systems is that such a recycled abrasive does not have to be dried and can be filled into the system in a moist, lumpy or any form.
  • Fig. 10 no overflow 82 is provided, but a circuit between the refill funnel 25 and the pre-loading container 78, the pump 80 on the output side of the refill funnel 25 driving the circuit for filling the refill funnel 25 with abrasive.
  • the refill funnel 25 is preferably closed in this case, so that the pump 80 can suck abrasive medium suspension from the pre-loading container 78.
  • the pump 80 conveys relatively clean water and not a saturated abrasive suspension as in FIG Fig. 8 . This reduces wear in the pump 80.
  • sucking in the abrasive suspension is less prone to clogging than pressing it.
  • a screw conveyor 84 can also be arranged on the inlet side to the refill funnel 25 in order to convey abrasives into the refill funnel 25. This is particularly advantageous if there is no abrasive suspension in the pre-loading container 78, but abrasive as a dry powder or in a moist, lumpy form.
  • the refill funnel 25 can even be dispensed with entirely (see FIG Fig. 12 ), if the conveying via a screw conveyor 84 or a pump 80 takes place quickly enough and in a controlled manner directly into the filling valve 23.
  • the water displaced by the abrasive when the lock chamber 21 is filled can be returned from the lock chamber 21 to the refill funnel 25 via the pump shut-off valve 33 will.
  • This can also according to the claimed invention with a pump 31 according to FIG Figs. 1 to 5 be supported in order to additionally actively suck abrasives into the lock chamber 21.
  • Fig. 13 illustrates the procedural steps over time.
  • a first step 301 water is provided under high pressure in the high pressure line 5 by means of the high pressure source 3.
  • a pressurized abrasive suspension is then also provided 303 in the pressure vessel 11.
  • a workpiece can then be cut 305 by means of the high-pressure jet 9, which at least partially contains the abrasive suspension, while removing the abrasive suspension from the pressure vessel 11.
  • Steps 307 to 311 are used for the portioned and cyclical refilling of the pressure vessel 11 with abrasive during the continuous cutting 305.
  • the unpressurized lock chamber 21 is filled 307 with abrasive or an abrasive suspension.
  • the conveying aid 45 is shut off from the unpressurized lock chamber 21 by the conveying aid shut-off valve 47.
  • the pump 31 is then shut off 308 from the lock chamber 21.
  • the lock chamber is then at least partially imprinted 309 by unloading the pressure accumulator 39, and finally the pressure vessel 11 is refilled 311 with abrasive or an abrasive suspension via the refill valve 19 from the printed lock chamber 21 311, the conveying aid 45 is fluidly connected to the printed lock chamber 21 via the opened conveying aid shut-off valve 47.
  • the conveying aid shut-off valve 47 and the pressure valve 37 and the refill valve 19 are shut off in order to Lock chamber 21 to be able to relieve pressure via the pressure relief valve 27 in the drain 29 for the next filling step.
  • the pressure accumulator can be pressurized 313 via the throttle 41 from the high pressure line 5.
  • the lock chamber 21 can at least partially over the throttle 41 can be printed 315 from the high pressure line 5. This slow throttled printing 315 from the high pressure line 5 can last longer than the fast printing 309 by unloading the pressure of the pressure accumulator 39.
  • the printing 309 of the lock chamber 21 can be done by unloading the pressure of a pressure accumulator 39 during a first time window A and the printing 315 of the lock chamber 21 of the high-pressure line 5 take place during a second time window B, the first time window A and the second time window B at least partially overlapping, preferably at their beginning.
  • the printing 309 on the lock chamber 21 by unloading the pressure accumulator can take place so quickly that the abrasive agent located in the lock chamber 21 is loosened by a pressure surge.
  • the lock chamber is printed 309 by unloading pressure from the accumulator 39, preferably in a lower area of the lock chamber 21, since any blockages of abrasive are more likely in a lower area than in an upper area.
  • the pressure inlet 35 of the lock chamber 21 is blocked from the pressure accumulator 39 and / or the high pressure line 5 during the filling 307 and the refilling 311.
  • the pressure loading 313 of the pressure accumulator 39 can thus take place during the filling 307 and / or of refilling 311 take place.
  • energy can be stored in the pressure accumulator 39 via spring or fluid compression, which can be designed, for example, as a spring or bladder accumulator.
  • Filling 307, printing 309 and refilling 311 can take place cyclically while cutting 305 can be carried out continuously.
  • pressure accumulator 39 can initially be shut off by pressure accumulator 39 from high pressure line 5 by means of pressure accumulator valve 43.
  • the pressure accumulator valve 43 can preferably only be opened again to charge the pressure accumulator 39 with pressure when the lock chamber 21 has been pressurized from the high pressure line 5 via the throttle 41.
  • Fig. 14 illustrates an exemplary curve of the pressure p over time t in the lock chamber 21 (above), in the pressure accumulator 39 (in the middle) and in the high-pressure line 5 (below).
  • the pressure in the unprinted lock chamber 21 is initially the ambient pressure, which here is on the zero line.
  • the lock chamber 21 can be filled 307 in this unprinted phase before the start of printing 309 at time to.
  • the printing 309, 315 begins at time to.
  • the lock chamber 21 is now pressurized 309 to up to 40% of the nominal high pressure po from the pressure discharge of the pressure accumulator 39.
  • the pressure accumulator 39 is then discharged to a minimum at t 1 and is then via the pressure accumulator valve 43 according to the second embodiment in FIG Fig. 2 locked.
  • the lock chamber 21, however, slowly becomes longer within the second Time window B t 2 -t 0 further printed 315 from the high-pressure line 5 via the throttle 41 until the nominal high pressure po is reached at t 2 .
  • the printing 309, 315 of the lock chamber 21 can take 5 to 10 seconds.
  • the refilling 311 can begin and the pressure vessel 39 can be pressurized 313 again at the same time.
  • the lock chamber 21 is completely pressurized from the high pressure line 5 via the throttle 41 over the time window B.
  • the refill valve 19 is open between t 2 and t 3 so that abrasive agent can flow into the pressure vessel 11.
  • the abrasive has completely flowed out of the lock chamber 21 into the pressure vessel 11 and the refilling step 311 is completed.
  • the pressure from the lock chamber 21 can be released relatively quickly via the pressure release valve 27 into the outlet 29 until low pressure prevails again in the lock chamber 21 at t 4 .
  • a new refilling cycle can then start, beginning with the filling 307 of the lock chamber 21.
  • the pressure accumulator 39 is preferably repressurized from the high pressure line 5 as slowly and throttled as possible from t 2 in order to be fully pressurized again at t 0 for the printing 309.
  • the lower graph shows the pressure drop in the high pressure line 5 when the pressure valve 37 opens at t 0 or the pressure accumulator valve 43 opens at t 2 .
  • the amplitude of the pressure drop is in each case reduced via the throttle 41 to a level at which the cutting performance of the cutting jet 9 is not significantly impaired.
  • FIGs 15a and 15b the refill valve 19 is shown in cross section in more detail in different opening positions. Since the refill valve 19 has to be actuated under high pressure on the valve inlet 49 and the valve outlet 51, the trouble-free actuation of the refill valve 19 is a technical challenge. The reliable one Opening and closing of the refill valve 19 is now ensured by four sub-aspects, each of which alone or in any combination of two, three or all four sub-aspects contribute to ensuring that the refill valve 19 is not clogged or blocked by the abrasive.
  • the refill valve 19 which is preferably designed as a ball valve, has a vertical flow direction D from top to bottom and has a centrally arranged valve body 67 with spherical outer surfaces that can be rotated about an axis of rotation R perpendicular to the flow direction D.
  • the valve body 67 has a central opening 69, which in the in Figures 15a and 15b The opening positions shown run parallel to the flow direction D and perpendicular to the axis of rotation R.
  • the first open position according to Figure 15a differs from the second open position according to Figure 15b in that the valve body 67 is rotated by 180 ° with respect to the axis of rotation R.
  • the valve body 67 sits in a valve chamber 71 between an upper valve seat 73 and a lower valve seat 75.
  • the upper valve seat 73 forms the valve inlet 49 and the lower valve seat 75 forms the valve outlet 51.
  • the upper valve seat 73 and the lower valve seat 75 are coaxial with one another and with the vertical flow direction D arranged.
  • the valve chamber 71 can be flushed through via the lateral flushing inlet 66 and via the flushing outlet 63 diametrically opposite the flushing inlet 66, preferably when the refill valve 19 is completely pressureless.
  • the refill valve 19 is capable of a first closed position ( Figure 16a ), a first open position ( Figure 15a ) and a second open position ( Figure 15b ), whereby in the first closed position ( Figure 16a ) the lock chamber 21 is fluid-separated from the pressure vessel 11 and in the first and second open position ( Figures 15a-b ) the lock chamber 21 with the pressure vessel 11 is fluidly connected.
  • the first open position and the second open position are essentially hardly distinguishable due to the symmetry of the valve body 67.
  • the valve body 67 can be rotated as far as desired in one direction about the axis of rotation R, so that a reversal of the direction of rotation is in principle not necessary and the valve body 67 can only be actuated in one direction of rotation, provided that the torque required for this does not exceed a certain threshold value.
  • the first closed position off Figure 16a is here at 90 ° between the first open position and the second open position. In this case there is also a second closed position (see Figure 16b ), which is rotated 180 ° around the axis of rotation R compared to the first closed position.
  • the opening 69 runs in the in Figures 16a and 16b
  • the closed positions shown are both perpendicular to the flow direction D and perpendicular to the axis of rotation R, so that the valve body 67 seals the valve inlet 49 on the upper valve seat 73 and the valve outlet 51 on the lower valve seat 75.
  • the optional flush inlet 66 and flush outlet 63 are not shown here, but can be provided be.
  • valve body 67 can be moved in the other direction of movement and the valve 19 can be brought into the other open / closed position.
  • the inversion can resolve the blockage or blockage so that the next time you press the button, the previously blocked direction of movement is free again.
  • the refill valve 19 can also be shaken free by turning it back and forth several times, for example if the valve body 67 is difficult to operate in both directions of movement.
  • the valve chamber 71 can be printed on when the valve body 67 is in a closed position.
  • Figures 17a-b shows the valve chamber 71 for this purpose the pressure inlet 53 via which the valve chamber 71 can be pressurized when the valve body 67 is in a closed position.
  • the pressure inlet 53 is arranged here in the yz plane coaxially to a servomotor shaft 86 opposite the latter.
  • the pressure inlet 53 can also lie in the xz plane perpendicular thereto and, if necessary, can be used as a rinsing inlet 66 as required.
  • the valve body 67 is rotated about the axis of rotation R via the servomotor shaft 86.
  • valve chamber 71 When the initially pressureless system 1 is started up or started up again, the valve chamber 71 is initially pressureless. If the pressure vessel 11 and the lock chamber 21 are then pressurized to about 2,000 bar, the valve body 67 can be clamped by the valve seats 73, 75 due to the high pressure on the inlet and outlet side with simultaneous low pressure in the valve chamber 71 and can only be moved with difficulty or not at all. By means of the pressure inlet 53, the pressure difference between the valve chamber 71 and the valve inlet 49 or the valve outlet 51 can be largely reduced during start-up, so that the valve body 67 is not pinched by the high pressure.
  • the upper valve seat 73 according to the fourth sub-aspect is shown adjustable via an adjusting device.
  • the upper valve seat 73 can be positioned via an external thread by rotating about the flow direction D in the z-direction. The rotation can be carried out manually or by means of a motor-driven lever 88 which engages in engagement surfaces 77 from the outside.
  • the valve chamber is such as, for example, in FIG Figures 15a-b shown flushable.
  • the refill valve has the flushing inlet 66 and the flushing outlet 63, via which the valve chamber 71 can be flushed.
  • the pressure inlet 53 can optionally serve as a flushing inlet 66. This is particularly advantageous in combination with the second sub-aspect of a pressure inlet 53, since a flushing cycle can be carried out with a depressurized valve chamber 71 or completely depressurized system 1 and then, when the system 1 is restarted, the valve chamber 71 is re-printed via the pressure inlet 53 can be so that the valve body 67 is not pinched by high pressure.
  • the refill valve has the inlet-side upper valve seat 73 and the outlet-side lower valve seat 75, at least one of the valve seats 73, 75 being adjustable so that the distance between the valve seats 73, 75 can be adjusted.
  • the refill valve 19 can be optimally adjusted, on the one hand to be tight and on the other hand not to block. It can be advantageous to readjust the distance between the valve seats 73, 75 when the system is put into operation, in the event of temperature fluctuations, a stubborn blockage due to abrasives and / or material wear.
  • a tool opening 90 can be provided through which a tool in the form of a lever 88 can grip in order to adjust the at least one adjustable valve seat 73.
  • the valve seat 73 is preferably set in a service procedure when the system 1 is depressurized.
  • the upper inlet-side valve seat 73 can be adjusted axially along the flow direction D via an external thread.
  • Lever 88 can be attached from the outside to attack surfaces 77 (see FIG Figure 18b ) to rotate the valve seat 73.
  • the refill valve 19 does not have to be separated from the system 1 or dismantled.
  • the operator can thus intervene immediately manually in order to ensure continuous operation, or switch off the system 1 and depressurise it in order to carry out the adjustment of the valve seat 73 as a service procedure.
  • the readjustment can also take place automatically controlled and / or regulated by a motor.
  • the valve body 67 is preferably rotated about the axis of rotation R in a controlled manner by means of a servomotor (not shown). This can possibly measured torque or the power consumption of the motor can be monitored, so that when a threshold value is exceeded, the direction of rotation can be changed to the other open or closed position. Alternatively or additionally, torque or power peaks can be recorded over a certain period of time and an error or maintenance case can be signaled based on this recording. For example, the need for readjusting the valve seat 73 can be displayed.
  • Figures 19a-b show two embodiments of flushable needle valves that can be used, for example, as one or more of the shut-off valves 15, 27, 33, 37, 47 or at another point in the system 1.
  • the needle valve according to Figure 19a is preferably used where the needle valve does not have to open or close under high pressure, e.g. as a pump shut-off valve 33 in the circuit to support the filling of the lock chamber 21.
  • the pump shut-off valve 33 has a high-pressure inlet 92, which is axially and coaxially arranged with a high-pressure inlet 92 positionable needle 94 with respect to a low pressure outlet 95 can be shut off.
  • the needle 94 At an end facing the high pressure inlet 92, the needle 94 has a conical closing surface 96 which can be pressed against a valve seat 98 for blocking. As soon as the high pressure inlet 92 is shut off, high pressure can be given to the high pressure inlet 92 without it escaping via the low pressure outlet 95. If there is no high pressure at the high pressure inlet 92, the pump shut-off valve 33 can be opened in order to allow a flow at low pressure from the high pressure inlet 92 to the low pressure outlet 95.
  • the needle valve according to Figures 19a-b also has a rinsing inlet 100, via which the opened needle valve can be rinsed, with rinsing liquid, ie water or water with cleaning additives, can flow out via the low pressure outlet 95.
  • rinsing liquid ie water or water with cleaning additives
  • the needle valve can preferably be rinsed shortly before the refill valve 19 closes.
  • Figure 19b shows a needle valve with a check valve 102 at the rinsing inlet 100.
  • the check valve 102 prevents backflow into the rinsing inlet 100 and only allows rinsing liquid to flow in the direction of the needle valve. This is useful if the needle valve is used, for example, as one or more of the shut-off valves 15, 27, 37, 47, since the valve is opened there when there is high pressure at the high pressure inlet 92. Without the check valve 102, this high pressure would at least partially discharge into the flushing inlet 100 and lead to a backflow into the flushing inlet 100.
  • the check valve 102 prevents this and thus enables a clean pressure release via the low pressure outlet 95.
  • the low pressure outlet 95 can also be a high pressure outlet 95.
  • the low-pressure outlet 95 is connected to an outlet 29.
  • the high pressure outlet 95 is connected to the pressure inlet 35 of the lock chamber 21 in order to subject it to high pressure.
  • the needle valves are preferably operated pneumatically via a pressure plate (not shown).
  • a pressure plate (not shown).
  • air pressure can be applied to the much larger pressure plate so that the needle valve can be closed with just a few bar of air pressure and kept tight against a high pressure of 1,500 bar and more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (15)

  1. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) comprenant :
    - une source haute pression (3) destinée à fournir (301) de l'eau sous haute pression,
    - un conduit haute pression (5) relié à la source haute pression (3),
    - un réservoir sous pression (11) destiné à fournir (303) une suspension de moyen abrasif (13) sous pression,
    - une chambre de sas (21) configurée pour être temporairement sous haute pression et temporairement sous basse pression, et
    - une soupape de remplissage (23) destinée à remplir (311) la chambre de sas (21) lorsque celle-ci est sous basse pression, caractérisée en ce
    qu'une pompe (31) est reliée fluidiquement, côté aspiration, à la chambre de sas (21) de manière verrouillable de sorte que la pompe (31), en cas de haute pression dans la chambre de sas (21), est verrouillée vis à vis de celle-ci et, en cas de basse pression dans la chambre de sas (21), est en mesure d'aspirer une suspension de moyen abrasif par la soupape de remplissage (23) dans la chambre de sas (21).
  2. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon la revendication 1, une soupape d'arrêt de pompe (33) étant disposée entre la pompe (31) et la chambre de sas (21).
  3. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon la revendication 2, la soupape d'arrêt de pompe (33) étant une soupape à pointeau.
  4. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon la revendication 2 ou 3, la soupape d'arrêt de pompe (33) pouvant être rincée.
  5. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon l'une des revendications précédentes, la pompe (31) étant reliée, côté refoulement, à un entonnoir de remplissage (25), lequel est relié fluidiquement, côté sortie, à un côté entrée de la soupape de remplissage (23).
  6. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon l'une des revendications précédentes, la pompe (31) étant reliée fluidiquement, côté aspiration, de manière verrouillable à une région supérieure de la chambre de sas (21).
  7. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon l'une des revendications précédentes, la pompe (31) étant une pompe à membrane.
  8. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon l'une des revendications précédentes, la chambre de sas (21) pouvant être détendue par l'intermédiaire d'une soupape de décharge (27) ayant la forme d'une soupape à pointeau apte à être rincée.
  9. Installation de découpe par jet d'eau chargée d'abrasif en suspension (1) selon la revendication 8, la soupape de décharge (27) comportant, à une admission de rinçage (100), un clapet anti-retour (102) .
  10. Procédé de découpe par jet d'eau chargée d'abrasif en suspension, comprenant les étapes suivantes :
    - mettre à disposition (301) de l'eau sous haute pression dans un conduit haute pression (5) au moyen d'une source haute pression (3),
    - mettre à disposition (303) une suspension de moyen abrasif (13) sous pression dans un réservoir sous pression (11),
    - découper (305) un matériau à l'aide d'un jet haute pression (9) contenant au moins en partie la suspension de moyen abrasif, en prélevant la suspension de moyen abrasif (13) du réservoir sous pression (11),
    - remplir (307) une chambre de sas (21) sous basse pression avec un moyen abrasif par aspiration au moins temporaire d'une suspension de moyen abrasif dans la chambre de sas (21) à l'aide d'une pompe (31) verrouillable vis à vis de la chambre de sas (21),
    - verrouiller (308) la pompe (31) vis à vis de la chambre de sas (21),
    - mettre sous haute pression (309) la chambre de sas (21), et
    - recharger (311) le réservoir sous pression (11) en moyen abrasif à partir de la chambre de sas (21) sous haute pression, dans le réservoir sous pression (11).
  11. Procédé selon la revendication 10, le verrouillage (308) de la pompe (33) vis à vis de la chambre de sas étant réalisé par une soupape d'arrêt de pompe (33) ayant la forme d'une soupape à pointeau.
  12. Procédé selon la revendication 10 ou 11, comprenant, en outre, un rinçage d'une soupape d'arrêt de pompe (33) disposée entre la pompe (31) et la chambre de sas (21).
  13. Procédé selon l'une des revendications 10 à 12, le remplissage (307), le verrouillage (308), la mise en pression (309) et le remplissage (311) se déroulant successivement et de manière cyclique pendant la découpe (305).
  14. Procédé selon l'une des revendications 10 à 13, comprenant, en outre, une décharge de la chambre de sas (21) de la haute pression à la basse pression après le remplissage du réservoir sous pression (11).
  15. Procédé selon la revendication 14, la décharge s'effectuant par l'intermédiaire d'une soupape de décharge (27) ayant la forme d'une soupape à pointeau apte à être rincée, dans un écoulement (29).
EP17717102.2A 2017-03-31 2017-03-31 Installation et procédé de découpe par jet d'eau chargée d'abrasif en suspension Active EP3600767B1 (fr)

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JP2020515422A (ja) 2020-05-28
CN110719827B (zh) 2021-11-09
KR20190134716A (ko) 2019-12-04
MX2019011569A (es) 2019-11-18
BR112019019228A2 (pt) 2020-04-14
PL3600767T3 (pl) 2021-08-16
CA3058489A1 (fr) 2018-10-04
US11904435B2 (en) 2024-02-20
CN110719827A (zh) 2020-01-21
CA3058489C (fr) 2024-02-13
JP7097384B2 (ja) 2022-07-07
AU2017407667A1 (en) 2019-10-17
WO2018177557A1 (fr) 2018-10-04
US20210101255A1 (en) 2021-04-08
EP3600767A1 (fr) 2020-02-05

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