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Water-abrasive-suspension cutting system and method for water-abrasive-suspension cutting

a suspension cutting and water-abrasive technology, applied in the direction of abrasive equipment, manufacturing tools, blast generating devices, etc., can solve the problems of reducing cutting performance, reducing the water ratio of abrasive agents, and reducing the efficiency of abrasive re-filling, so as to minimize the risk of blockage

Inactive Publication Date: 2021-04-15
ANT APPLIED NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent text describes a water-abrasive suspension cutting facility and method that have the advantage of quickly re-filling the pressure tank and minimizing the risk of blockages. The facility includes a delivery aid that assists the abrasive agent in flowing out of the lock chamber through the refilling valve and into the pressure tank. The delivery aid creates a pressure difference between the tank and the lock chamber which helps accelerate the flow. The refilling process is quick and efficient, which reduces the risk of blockages and downtime.

Problems solved by technology

With regard to water-abrasive injection cutting facilities, although there is not the problem of mixing the abrasive agent with the water at a high pressure since the abrasive agent is not fed until at the exit nozzle, the abrasive agent—water ratio however is very limited with regard to water-abrasive injection cutting facilities and herewith its cutting force.
Furthermore, in the case of water-abrasive injection cutting facilities, entrapped air leads to a reduction of the cutting performance due to the ineffective acceleration of the abrasive agent particles on being sucked into the water jet, as well as to high air components in the cutting jet.
With regard to these facilities, the refilling of the abrasive agent is a technical challenge, since for this the facility must be taken out of operation, the abrasive agent container must be brought into a pressureless state and only then can it be filled.
Due to the particularly high pressures to some extent above 2000 bar, the cyclical pressurization and depressurization of a lock chamber however is somewhat of a technical challenge.
The refilling of the pressure tank leads in the known facilities and in the known processes to blockages and time-intensive refilling cycles.

Method used

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  • Water-abrasive-suspension cutting system and method for water-abrasive-suspension cutting
  • Water-abrasive-suspension cutting system and method for water-abrasive-suspension cutting
  • Water-abrasive-suspension cutting system and method for water-abrasive-suspension cutting

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first embodiment

[0060]In the first embodiment which is shown in FIG. 1, the pressure accumulator 39 is charged in pressure immediately from the moment, in which it has discharged itself of pressure. In this case, the high-pressure conduit 5 pressurizes the lock chamber 21 with the residual pressure as well as the pressure accumulator 39. This is particularly advantageous when the charging of the pressure accumulator 39 with pressure is so time-consuming that the refilling throughput rate depends on the pressure charging time of the pressure accumulator 39.

second embodiment

[0061]In the second embodiment which is shown in FIG. 2, the pressure accumulator 39 can be shut off by a pressure accumulator valve 43 in the form of a needle valve. The pressure accumulator valve 43 can be shut off at the moment, in which the pressure accumulator 39 has discharged itself of pressure, in order not to additionally load the high-pressure conduit 5 by the pressurization of the pressure accumulator 38 during the pressurization of the lock chamber 21. Such a loading could cause a pressure drop in the high-pressure conduit 5 which could have a negative influence upon the cutting performance at the exit nozzle 7. For this reason, it is advantageous for the pressure accumulator valve 43 not to open until the lock chamber 21 is completely pressurized and the pressurization valve 37 is closed, so that the pressure accumulator 39 can be charged in pressure from the high-pressure conduit 5 via the throttle 41. In particular, this is advantageous if the pressure charging of the...

third embodiment

[0062]In a third embodiment according to FIG. 3, one completely forgoes the pressure accumulator 39, and the lock chamber 21 is pressurized exclusively from the high-pressure conduit 5 via the throttle 41. This is advantageous if the high-pressure source 3 for example via a servo pump control can react so quickly to an initial pressure drop and the pump power adapted accordingly, that a large amplitude of the pressure drop does not even occur 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 rapidly counter-control a further pressure drop with an increase in the power or a speed increase. The initial pressure drop can already be lessened via the throttle 41, so that at no point in time does a pressure drop which significantly compromises the cutting power occur.

[0063]As soon as the lock chamber 21 has now been completely pressurized, the refilling valve 19 can be opened, so that...

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Abstract

A water-abrasive suspension cutting facility (1) includes a high-pressure source (3) for providing (301) water at a high pressure, a high-pressure conduit (5) which is connected to the high pressure source (3), a pressure tank (11) for providing (303) an abrasive agent suspension (13) which is at a high pressure, a lock chamber (21) which is designed to temporarily be at a high pressure and temporarily at a low pressure and a refilling valve (19) for refilling (311) the pressure tank (11) from the lock chamber (21). A delivery aid (45) is fluid-connected to the pressure tank (11) at the suction side in a manner such that given high pressure in the lock chamber (21), the delivery aid is cable of sucking an abrasive agent suspension out of the lock chamber (21) through the refilling valve (19) into the pressure tank (11).

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a United States National Phase Application of International Application PCT / EP2017 / 057785 filed Mar. 31, 2017, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present disclosure relates to a water-abrasive suspension cutting facility with the features which are specified in the preamble of claim 1 and to a method for water-abrasive suspension cutting.BACKGROUND OF THE INVENTION[0003]Water-abrasive suspension cutting facilities are used for cutting materials by way of a high-pressure water jet, to which an abrasive agent is added. Water-abrasive suspension cutting facilities are to be differentiated from water-abrasive injection cutting facilities, concerning which the abrasive agent is not introduced into the already greatly accelerated water until or at an exit nozzle. Concerning water-abrasive suspension cutting facilities, the water which is at a high pressure is fir...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B24C1/04B24C7/00B24C5/06
CPCB24C1/045B24C5/06B24C7/0007
Inventor LINDE, MARCO
Owner ANT APPLIED NEW TECH