Plasma torch installation

Abstract

Title: Plasma Torch Installation. The invention relates to a plasma torch installation (1) comprising a torch chamber (10) configured to contain an active electrode, at least one introduction chamber (20) extending along a longitudinal axis (A) and configured to allow the introduction of an additional electrode, and a transit device (30) configured to move an additional electrode from the introduction chamber to the torch chamber. The installation is characterized in that the at least one introduction chamber comprises a sealed wall (21), the sealed wall comprising an inlet (211) and an outlet (212) forming two distinct openings in the wall, and in that the inlet comprises a first shutter (2111) and the outlet comprises a second shutter (2121) configured to seal the inlet and outlet of the at least one introduction chamber, respectively. Figure for the abstract: Fig. 3.

Description

Title of the invention: Plasma torch installation technical field

[0001] The present invention relates to the field of electrodes for plasma torches. Its application is particularly advantageous in the field of installations using plasma torches, such as, but not limited to, the production of carbon black and dihydrogen from an alkane gas such as methane. PRIOR TECHNOLOGY

[0002] In plasma torches, one or more electrodes are at least partially immersed in the internal volume of a reactor where electric arcs are produced. There are plasma generators operating on direct current, in which the electrodes always have the same polarity. There are also plasma generators operating on three-phase current, with three electrodes, each assigned to one phase, which alternately act as anode and cathode. In such a case, the plasma torch installation comprises three active electrodes immersed in a reactor. The plasma is created in the torch by blowing a plasma-generating gas, which is transformed into plasma by electrical discharges.

[0003] The electrical and thermal phenomena induced in plasma generators cause erosion of the active electrodes. Therefore, when the active electrodes are worn, it is generally necessary to stop industrial operation and replace the electrodes before resuming operation.

[0004] French publication FR3096221A1 discloses a solution that does not require stopping the torch thanks to a magazine containing a plurality of additional electrodes. This magazine is configured so as to be able to move an additional electrode from the magazine to the torch chamber and to automatically connect an additional electrode to the active electrode.

[0005] This device has the advantage of not requiring the torch to be stopped when loading an additional electrode. However, this device requires adapting the magazine to the torch in order to hold a sufficient number of additional electrodes.

[0006] An object of the present invention is therefore to propose a solution for improving the introduction of an additional electrode into a plasma torch without stopping or at least disrupting the operation, that is to say without disrupting or even stopping the torch.

[0007] The other objects, features and advantages of the present invention will become apparent from an examination of the following description and accompanying drawings. It is understood that other advantages may be incorporated. SUMMARY

[0008] To achieve this objective, according to a first aspect, a plasma torch installation is planned, configured to generate a plasma and comprising: • a torch chamber configured to contain at least one active electrode, • at least one introduction chamber extending along a longitudinal axis and configured to allow the introduction of at least one additional electrode into the torch chamber, • a transit device configured to move an additional electrode from the introduction chamber to the torch chamber, characterized in that at least one introduction chamber comprises a sealed wall, the sealed wall comprising an inlet and an outlet forming two separate openings in the wall, the outlet opening into the torch chamber, and in that the inlet of at least one introduction chamber comprises a first shutter configured to close the inlet in a sealed manner and in that the outlet of at least one introduction chamber comprises a second shutter configured to close the outlet in a sealed manner.

[0009] Thus, a means is provided for introducing an additional electrode that can be successively charged, by assembly, in continuity with a current active electrode so as to recover a useful length of additional electrode without stopping the plasma torch. Indeed, the introduction chamber acts as an airlock, allowing the introduction of an additional electrode without disrupting operation, that is, without disrupting or even stopping the torch. Moreover, preferably, the installation prevents pressure drops in the torch chamber during the introduction of an additional electrode. The introduction of this additional electrode into the introduction chamber can be carried out manually by a user or by a robotic system. At the same time, the invention is based on recharging using prefabricated additional electrodes.

[0010] Another aspect of the present invention relates to a method for loading an additional electrode in an installation, the method comprising: • the introduction of at least one additional electrode through the inlet of the introduction chamber, • a movement of the additional electrode via the transit device, from the inlet of the introduction chamber to the outlet of the introduction chamber, • an introduction of the additional electrode into the torch chamber.

[0011] Thus, an additional electrode can be positioned in the torch chamber without lowering the pressure in the torch and therefore without stopping the torch.

[0012] Another separable aspect relates to a plasma torch installation configured to generate plasma and comprising: • a torch chamber configured to contain at least one active electrode, • at least one introduction chamber extending along a longitudinal axis and configured to allow the introduction of at least one additional electrode into the torch chamber, • a transit device configured to move an additional electrode from the introduction chamber to the torch chamber, the transit device being configured to move an additional electrode in a helical motion, the helical motion being achieved by a translation module and a rotation module.

[0013] A method for setting at least one electrode in motion, particularly for a plasma torch, is also described, comprising a translational drive of the electrode about its longitudinal axis coupled to a rotational drive about this axis. The coupling of the drives can be such that the two movements are simultaneous and preferably synchronous. The coupling can also be in the form of several successive sequences, each comprising a rotation and a translation (in that order or not), preferably with identical rotational and translational steps in each sequence. This results in a helical movement of the electrode, particularly useful for assembly with another electrode. BRIEF DESCRIPTION OF THE FIGURES

[0014] The aims, objects, features and advantages of the invention will become clearer from the detailed description of an embodiment thereof, which is illustrated by the following accompanying drawings in which:

[0015] [Fig.1A] Fig.1A represents a block diagram showing the environments through which an additional electrode passes.

[0016] [Fig.1B] Fig.1B represents a block diagram of process steps.

[0017] [Fig.2] Fig.2 represents a cross-sectional view of the plasma torch installation.

[0018] [Fig.3] Fig.3 represents a cross-sectional view of the introduction chamber.

[0019] [Fig. 4] [Fig. 4] shows a top view of a translation module of the device transit.

[0020] [Fig. 5] [Fig. 5] shows a top view of a rotating module of the device transit.

[0021] [Fig.6A] Figures 6A to 6C represent cross-sectional views of the introduction chamber and the steps of introducing an additional electrode.

[0022] [Fig.6B]

[0023] [Fig.6C]

[0024] The drawings are given by way of example and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily to scale with practical applications. In particular, the dimensions are not representative of reality. DETAILED DESCRIPTION

[0025] Before beginning a detailed review of embodiments of the invention, optional features which may possibly be used in association or alternatively are stated below.

[0026] According to one example, the installation includes a control unit, the control unit being configured to selectively position the first shutter and / or the second shutter in an open or closed position.

[0027] This allows the introduction chamber to be opened and / or closed. This opening and / or closing advantageously allows an additional electrode to be introduced into the torch chamber without interrupting plasma production. Indeed, the pressure in the introduction chamber can be regulated to prevent the creation of a pressure differential during the opening and / or closing of the first and / or second shutter.

[0028] According to one example, in an additional electrode supply configuration, the control unit is configured to open the first shutter and close the second shutter.

[0029] This power supply configuration allows an additional electrode to be introduced into the introduction chamber, intended to be subsequently introduced into the torch chamber, while keeping the plasma torch in operation.

[0030] According to one example, in a transit configuration of an additional electrode, the control unit is configured so as to close the first shutter and the second shutter.

[0031] This transit configuration allows an additional electrode to be introduced along its entire length into the introduction chamber. Furthermore, closing the first shutter isolates the introduction chamber from the external environment, and closing the second shutter isolates the introduction chamber from the torch chamber.

[0032] According to one example, at least one introduction chamber includes a pressure variator, the pressure variator being configured to vary the pressure in the introduction chamber.

[0033] This allows the pressure in the introduction chamber to be regulated so that it is consistent with the environment from which it is not isolated.

[0034] According to one example, in the feed configuration, the pressure regulator is configured to set the inlet chamber to a first pressure PI.

[0035] According to one example, the first pressure PI is equal to atmospheric pressure.

[0036] In the supply configuration, the pressure variator thus makes it possible to position the introduction chamber at a pressure with the medium with which it is not isolated, i.e. the outside and therefore at atmospheric pressure.

[0037] According to one example, in a transit configuration, the pressure variator is configured so as to put the inlet chamber at a second pressure P2.

[0038] In the transit configuration, the pressure variator allows the pressure in the introduction chamber to be changed from the first pressure PI to the second pressure P2.

[0039] According to one example, the second pressure P2 is equal to the pressure in the torch chamber.

[0040] The pressure regulator thus makes the inlet chamber and the torch chamber isobaric. In this way, the inlet chamber can act as an airlock between the outside and the torch chamber.

[0041] According to an example, the second pressure P2 is greater than the first pressure PI.

[0042] According to one example, the introduction chamber has a longitudinal dimension between its inlet and outlet, the longitudinal dimension of the introduction chamber being greater than a longitudinal dimension of an additional electrode.

[0043] This allows an additional electrode to be fully introduced into the introduction chamber before being introduced into the torch chamber.

[0044] According to one example, the transit device includes at least one translation module configured to move an additional electrode along a displacement axis to the torch chamber, the displacement axis being parallel to the longitudinal axis of the introduction chamber.

[0045] At least one translation module allows an additional electrode to be moved in a direction and thus introduced into the operating torch chamber.

[0046] According to one example, the transit device includes at least one rotation module configured to rotate an additional electrode around an axis of rotation, the axis of rotation being coincident with the longitudinal axis of the introduction chamber.

[0047] At least one rotation module allows an additional electrode to be easily introduced into the torch chamber during operation.

[0048] According to one example, the rotation module is configured to fix end-to-end a proximal end of an active electrode and a distal end of an additional electrode so that together they form a new active electrode.

[0049] This allows an active electrode being consumed in the torch chamber to be connected with an additional electrode without stopping the torch.

[0050] According to one example, the installation comprising at least one detection device, preferably several detection devices, at least one detection device being configured to detect at least one position of an additional electrode in the introduction chamber.

[0051] This allows the various opening and / or closing sequences of the first and second shutters to be initiated. It can also be used to determine the activation of the pressure regulator.

[0052] According to one example, in the power supply configuration and before the introduction of at least one additional electrode, the control unit places the first shutter in the open position and the second shutter in the closed position.

[0053] This allows an additional electrode to be inserted into the introduction chamber without stopping the torch.

[0054] According to one example, before the step of introducing the additional electrode into the torch chamber, the method includes, in a transit configuration, a closing step in which the control unit closes the first shutter.

[0055] This allows the introduction chamber to be isolated from the outside after the integration of an additional electrode, and therefore does not require stopping the torch.

[0056] According to one example, after the closing step, the process includes a pressurization step to a second pressure P2 by the pressure variator of the introduction chamber.

[0057] This allows the introduction chamber to be placed at a pressure equal to the pressure in the torch chamber and thus allow the insertion of an additional electrode into the torch without stopping it.

[0058] It is specified that within the framework of the present invention, the term "torch" or "plasma torch" includes any element which advantageously allows a gas to be partially ionized by blowing it, for example, through a very energy-dense electric arc.

[0059] The term “plasma torch” 12 may also include induction plasma torches.

[0060] It is specified that in the context of the present invention, the term "second pressure P2" refers, according to one embodiment, to the pressure at which the gas is in the torch.

[0061] It is specified that in the context of the present invention, the term "watertight" is extended as allowing the isolation of an internal volume under pressure from an external volume.

[0062] Initially, figures IA and IB represent block diagrams enabling one to understand the movement of an additional electrode 3 in an installation 1 according to the invention.

[0063] According to a first aspect, a plasma torch installation 1 is provided, configured to generate a plasma. Installation 1 will be described in the remainder of this description with reference to Figures IA to 3.

[0064] The plasma torch installation 1 comprises a torch chamber 10. The torch chamber 10 is configured to contain at least one active electrode 2. In a three-phase installation 1, as is the case for this invention, the torch chamber 10 may preferably contain three active electrodes 2. In such a case, the three active electrodes alternately act as anode and cathode to create electrical discharges that generate a plasma from a plasma-generating gas present in the torch chamber 10. Thus, the torch chamber 10 can have a regulated pressure to manage the plasma-generating gas present in the torch chamber 10.

[0065] The installation 1 includes at least one introduction chamber 20. Preferably, and in the case of a three-phase installation, the installation 1 includes three introduction chambers 20. Thus, the installation 1 includes as many introduction chambers 10 as there are active electrodes 2 present in the torch chamber 10 in order to facilitate maintenance of the installation 1 without stopping the torch.

[0066] In the remainder of the description, and without limitation, reference will be made to a single inlet chamber 20, each inlet chamber 20 of the installation 1 being identical to the others.

[0067] The introduction chamber 20 extends along a longitudinal axis A. The introduction chamber 20 is configured so as to allow the introduction of at least one additional electrode 3 into the torch chamber 10. Preferably, the introduction chamber 20 has a cylindrical shape around the longitudinal axis A. This cylindrical shape allows for easier operation under pressure.

[0068] The installation 1 also includes a transit device 30. The transit device 30 is configured to move an additional electrode 3. More specifically, the transit device 30 moves an additional electrode 3 from the introduction chamber 20 to the torch chamber 10. Thus, despite the consumption of the active electrode 2, it is replaced by an additional electrode 3, and the installation 1 thus allows the creation of plasma to continue continuously without disrupting operation.

[0069] To this end, the introduction chamber 20 advantageously comprises a wall 21. More precisely, the wall 21 is airtight. Preferably, the wall 21 is closed. Thus, the introduction chamber 20 can comprise an internal volume surrounded by the airtight wall 21. Airtight means a wall 21 capable of isolating the environment inside from the environment outside the wall 21. Thus, the introduction chamber 20 is hermetic to gases, and to air in particular, and it is possible, for example, to control the pressure within its internal volume. The pressure within its internal volume can then be between 1 bar and 20 bar, preferably between 1 bar and 10 bar, and preferably between 2 bar and 8 bar. It is understood here that 1 bar corresponds to 100,000 Pa (Pascals). This pressure may depend on the operating range of the installation 1.

[0070] Advantageously, the sealed wall 21 comprises an inlet 211 and an outlet 212. The inlet 211 and the outlet 212 form two separate openings in the wall 21. The outlet 212 leads into the torch chamber 10. The inlet 211 is thus positioned between the external environment 4 and the internal volume of the introduction chamber 20. Similarly, the outlet 212 is positioned between the internal volume of the introduction chamber 20 and the torch chamber 10. The inlet 211 and the outlet 212 thus allow the introduction of an additional electrode from an external environment 4 into the torch chamber 10.

[0071] The introduction chamber 20 also includes a first shutter 2111. More specifically, the inlet 211 of the introduction chamber 20 includes a first shutter 2111. The first shutter 2111 is configured to seal the inlet 211 airtight. The first shutter 2111 thus isolates the introduction chamber 20 from the external environment 4. More precisely, in the closed position, the first shutter 2111 maintains the pressure within the internal volume of the introduction chamber 20.

[0072] Similarly, the inlet chamber 20 includes a second shutter 2121. More specifically, the outlet 212 of the inlet chamber 20 includes a second shutter 2121. The second shutter 2121 is configured to seal the outlet 212 airtight. The second shutter 2121 thus isolates the inlet chamber 20 from the torch chamber 10. More precisely, in the closed position, the second shutter 2121 maintains the pressure within the internal volume of the inlet chamber 20.

[0073] The introduction chamber 20 thus acts as an airlock, allowing the introduction of an additional electrode 3 without disrupting operation, i.e., without disrupting or even stopping the torch. Therefore, the first shutter 2111 and the second shutter 2121 cannot be in the open position simultaneously. Furthermore, preferably, the installation 1 prevents pressure drops in the torch chamber 10 during of the introduction of an additional electrode 3. The introduction of this additional electrode 3 into the introduction chamber 20 can be carried out manually by a user or by a robotic system.

[0074] According to one example, the first shutter 2111 and the second shutter 2121 can be in the open position simultaneously. This configuration is possible during maintenance of the installation 1.

[0075] According to one example, seals can be positioned at the first 2111 and second 2121 obturators. These seals can thus provide additional gas and air tightness. The seals can be, for example, lip seals or seals for gate valves.

[0076] According to one example, the installation 1 includes a control unit. The control unit is not shown in the figures, but is not limited to them. The control unit can then be configured to control, for example, the first 2111 and second 2121 shutters. More specifically, the control unit can selectively position the first shutter 2111 in an open or closed position. Similarly, the control unit can selectively position the second shutter 2121 in an open or closed position. The control unit is then capable of managing the sequences for introducing an additional electrode 3 into the introduction chamber 20 and then into the torch chamber 10. Indeed, the control unit allows control of the opening of the introduction chamber 20 and the opening of the torch chamber 10.The control unit managing the opening and / or closing of the first 2111 and second 2121 shutters advantageously allows the introduction of an additional electrode into the torch chamber 10 without stopping plasma production. Indeed, the pressure can then be regulated in the introduction chamber 20 to avoid creating a pressure differential during the opening and / or closing of the first 2111 and / or second 2121 shutters.

[0077] It is preferable to have a fully automated control unit to manage the opening and closing of the shutters; this allows for the automatic execution of electrode loading cycles. However, the control unit can also be at least partially controlled externally, typically by a user. For example, loading a new electrode can be carried out by a user by manually controlling the shutters according to the opening and closing sequences described herein; this control can be manual (for example, for a shutter moved manually) or assisted (for example, for a shutter whose movement is motorized but activated by a manual action).

[0078] According to one example, in an additional electrode supply configuration 3, the control unit will then open the first shutter 2111. This will allow the introduction of an additional electrode 3 into the introduction chamber 20. Simultaneously, the control unit closes the second shutter 2121. Thus, the pressure in the introduction chamber 20 corresponds to the external environmental pressure 4. Similarly, the pressure in the torch chamber 10 remains unchanged because the second shutter 2121 is closed, preventing the pressure in the torch chamber 10 from fluctuating. Therefore, an additional electrode 3 is introduced into the installation 1, specifically into the introduction chamber 20, without interrupting the operation of the plasma torch.

[0079] According to one example, following an electrode feeding configuration, the installation 1 enters a transit configuration. In the transit configuration of an additional electrode 3, the control unit can then close the first shutter 2111. During this transit configuration, the second shutter 2121 remains in the closed position. This transit configuration allows an additional electrode 3 to be introduced along its entire length into the introduction chamber 20.

[0080] To achieve this, the introduction chamber 20 can then have a longitudinal dimension Li between its inlet 211 and its outlet 212. The longitudinal dimension Li of the introduction chamber 20 can then be greater than a longitudinal dimension L2 of an additional electrode 3. This thus makes it possible to completely introduce an additional electrode 3 into the introduction chamber 20 before introducing it into the torch chamber 10.

[0081] Furthermore, closing the first shutter 2111 thus isolates the introduction chamber 20 from the external environment 4 and closing the second shutter 2121 isolates the introduction chamber 20 from the torch chamber 10.

[0082] According to one example, the introduction chamber 20 includes a pressure regulator. The pressure regulator can then be configured to vary the pressure in the introduction chamber 20. The pressure in the introduction chamber 20 can then be regulated to correspond with the environment from which it will not be isolated.

[0083] As an example, the pressure regulator may include a solenoid valve, for example, a hydraulic one. The pressure regulator can then reduce the upstream pressure to a desired downstream pressure. The pressure regulator can, for example, be controlled by a controller, such as a PLC (programmable logic controller).

[0084] According to one example, when the first shutter 2111 is opened, the inlet chamber 20 has a first pressure PL. The first pressure PI can be the same as the pressure outside the installation 1. Thus, simply opening the first shutter 2111 results in a change in the pressure inside the introduction chamber 20 to reach the first pressure PI. The first pressure PI can then be equal to atmospheric pressure.

[0085] Thus, when the first shutter 2111 is open, the pressure regulator can set the inlet chamber 20 to a first pressure PI. Similarly, in the feed configuration, the pressure regulator can be configured to set the inlet chamber 20 to the first pressure PI.

[0086] Similarly, when the first obturator 2121 is closed, the pressure regulator can set the inlet chamber 20 to a second pressure P2. Likewise, in a transit configuration, the pressure regulator can be configured to set the inlet chamber 20 to the second pressure P2. Thus, in the transit configuration, the pressure regulator allows the pressure in the inlet chamber 20 to be changed from the first pressure P1 to the second pressure P2.

[0087] According to one example, the second pressure P2 is equal to the pressure in the torch chamber. Thus, before opening the second shutter 2121 and introducing the additional electrode 3 into the torch chamber 10, the pressure regulator can ensure that the introduction chamber 20 and the torch chamber 10 are isobaric. In this way, the introduction chamber 20 can act as an airlock between the outside and the torch chamber 10. The pressure regulator can then be connected to at least two pressure sensors positioned respectively in the introduction chamber 20 and the torch chamber 10 to ensure that the second pressure P2 and the first pressure P1 are identical when the second shutter 2121 is open or about to be opened to allow the introduction of an additional electrode 3 into the torch chamber 10.

[0088] According to an example, the second pressure P2 is greater than the first pressure PL. The second pressure P2 can be between 2 and 10 MPa, preferably between 3 and 6 MPa.

[0089] According to one example, the transit device 30 comprises at least one translation module 31a, 31b. The at least one translation module 31a, 31b can then be configured so as to move, along a displacement axis D, an additional electrode 3 to the torch chamber 10. The displacement axis D being parallel to the longitudinal axis of the introduction chamber 20. The at least one translation module 31a, 31b makes it possible to move an additional electrode 3 in a direction and thus introduce it into the torch chamber 10 during operation.

[0090] In one example, the transit device 30 comprises a first and a second translation module 31a, 31b. The first translation module 31a is, in one example, positioned in the introduction chamber 20. The first translation module 31a thus allows an additional electrode 3 to be moved into the introduction chamber 20. More specifically, it can be positioned so that when an additional electrode 3 is introduced, the first translation module 31a comes into contact with a distal end 3b of the additional electrode 3. Thus, the distance between the inlet 211 of the introduction chamber 20 and the first translation module 31a is less than or equal to, preferably less than, the longitudinal dimension L2 of an additional electrode 3.

[0091] By way of example, the insertion of an additional electrode 3 into the insertion chamber 20 can be carried out manually. The insertion can therefore be performed by an operator. Advantageously, the insertion of an additional electrode 3 can also be carried out by a robotic arm. This makes it possible to automate this task if it needs to be performed at times when no operator is available to carry out the operation.

[0092] According to one example, the second translation module 31b is positioned in the torch chamber 10. The second translation module 31b can be configured so as to move the active electrode 2 in the torch chamber 10. More specifically, once the additional electrode 3 has been introduced at least partially into the torch chamber 10 and connected to the active electrode 2, the second translation module 31b is configured to move along the displacement axis D the new active electrode 2, composed of the additional electrode 3 and the old active electrode 2, out of the introduction chamber 20 so as to position it entirely in the torch chamber 10. To do this, the second translation module 31b is positioned at a distance less than or equal to, preferably equal to, the longitudinal dimension Lid of an additional electrode 3 from the first translation module 31a.

[0093] Advantageously, the first and second translation modules 31a, 31b are controlled by the control unit. The control unit may then include at least one motor configured to operate at least one translation module 31a, 31b. Thus, the control unit can synchronize the operation of the first and second translation modules 31a, 31b and the first and second shutters.

[0094] According to one example, the two translation moduli 31a, 31b are identical. The translation moduli 31a, 31b will now be described with reference to [Fig. 4].

[0095] According to one example, the first translation module 31a and the second translation module 31b comprise a main shaft 311. The main shaft 311 can then be configured to be connected to the control unit. Thus, the control unit can actuate or not the main shaft 311. Actuating the main shaft 311 can drive gears connecting the main shaft 311 to rollers 313. The rollers 313 can be configured to be in contact with an additional electrode 3 and / or an active electrode 2. The rotation of the main shaft 311 along an axis parallel to the axis of displacement D then causes the rollers 313 to rotate along an axis perpendicular to the axis of displacement D. The rollers 313 can then perform a rotational movement causing the displacement of an additional electrode 3 and / or active electrode 2 along the axis of displacement D.

[0096] For example, the rollers 313 are conical in shape. More precisely, the rollers 313 have the shape of two cones or truncated cones joined at their apex. The hollow formed by these two conical parts can receive the wall of an electrode and creates contact points capable of holding the electrode and, if the rollers are in motion, transmitting this motion to it.

[0097] According to one example, the transit device 30 comprises at least one rotation module 32a, 32b. The at least one rotation module 32a, 32b can then be configured so as to rotate an additional electrode 3 around a rotation axis R. The rotation axis R can coincide with the longitudinal axis Li of the introduction chamber 20.

[0098] In one example, the transit device 30 comprises a first and a second rotation module 32a, 32b. The first rotation module 32a is, in one example, positioned in the introduction chamber 10. More specifically, the first rotation module 32a is positioned below the first translation module 31a. Preferably, the first rotation module 32a is positioned so as to be in contact with the translation module 31a. The first rotation module 32a can then be configured to fix end-to-end a proximal end 2a of an active electrode 2 and the distal end 3b of an additional electrode 3. More specifically, at least the first rotation module 32a can participate in fixing an additional electrode 3 with an active electrode 2. Thus, after fixing, the active electrode 2 and the additional electrode 3 together form a new active electrode 2.This allows an active electrode 2 being consumed in the torch chamber 10 to be connected to an additional electrode 3 without stopping the torch.

[0099] According to one example, when the additional electrode 3 is introduced into the torch chamber 2, the rotation module 32a can be activated to rotate the additional electrode 3. The additional electrode 3 has a tapped hole at its distal end 3b that is compatible with a thread present on the distal end 2a of the active electrode 2. The combination of the rotation caused by the first rotation module 32a with the displacement caused by the first translation module 31a of the additional electrode 3 can then result in the additional electrode 3, present at least partially in the torch chamber 10, being fixed to the active electrode 2 present in the torch chamber 10. In order to secure the additional electrode 3 and the active electrode 2, during the screwing operation, the active electrode is held so as not to rotate or translation. Thus, the second rotation module 32b can apply pressure to the active electrode 2 to hold it in place. The combination of translational and rotational motion can result in helical movement. This helical movement can then have the same pitch as the thread / tap of the additional electrode 3 / active electrode 2.

[0100] According to another example, one of the supplementary electrode 3 or the active electrode 2 is translated by one of the first translation module 31a or the second translation module 31b, respectively, and the other of the active electrode 2 or the supplementary electrode 3 is rotated by one of the first rotation module 32a or the second rotation module 32b, respectively. The translation of one of the electrodes, synchronized with the rotation of the other, can produce a relative helical motion configured to allow the end-to-end joining of the supplementary electrode 3 with the active electrode 2. According to one example, the rotational and translational movements are continuous.Preferably, to allow butt-to-end fixing of the proximal end 2a of an active electrode 2 and the distal end 3b of the supplementary electrode 3, the supplementary electrode 3 translates by the activation of the first translation module 31a and the active electrode 2 is rotated by the activation of the second rotation module 32b. This prevents the active electrode 2 from rising from the torch chamber 10 and thus disrupting the operation of the installation 1.

[0101] According to another example, translation and rotation are performed alternately until the proximal end 2a of an active electrode 2 and the distal end 3b of the supplementary electrode 3 are joined end-to-end. This allows for an alternation between rotation and translation. In this scenario, rotation and translation occur sequentially, preferably with small increments (for example, less than 1 mm of translation and less than 1° of rotation per increment), and these sequences are repeated as many times as necessary to secure the electrodes.

[0102] According to one example, the second rotation module 32b is positioned in the torch chamber 10. The second rotation module 32b can then be configured to rotate the active electrode 2 in the torch chamber 10 so as to allow erosion of the active electrode 2 in the torch chamber 2, thus enabling plasma production. Surprisingly, the rotation of the active electrode 2 can allow uniform erosion of a distal end 2b of the active electrode 2. To achieve this, the second rotation module 32b is advantageously positioned below the second translation module 31b. Thus, the second rotation module 32b is positioned at a distance less than or equal to, preferably equal to the longitudinal dimension Lid'an additional electrode 3 of the first rotation module 32a.

[0103] Advantageously, the two rotation modules 32a, 32b are controlled by the control unit. The control unit may then include at least one motor configured to operate at least one rotation module 32a, 32b. Thus, the control unit can synchronize the operation of the first and second rotation modules 32a, 32b, the first and second translation modules 31a, 31b, and the first 2111 and second 2121 shutters.

[0104] According to one example, the two rotation moduli 32a, 32b are identical. The rotation moduli 32a, 32b will now be described with reference to [Fig. 5].

[0105] According to one example, the first rotation module 32a and the second rotation module 32b each include a main shaft 321. The main shaft 321 can then be configured to be connected to the control unit. The main shaft 321 of the rotation modules 32a, 32b and the main shaft 311 of the translation modules 31a, 31b can be one and the same rotation shaft. Thus, the control unit can activate or deactivate the main shaft 321. Activating the main shaft 321 can drive gears connecting the main shaft 321 to jaws 323. The jaws 323 can be configured to contact an additional electrode 3 and / or an active electrode 2. Rotating the main shaft 321 about an axis parallel to the axis of movement D then causes the jaws 323 to rotate about the axis of rotation R.The jaws 323 can then perform a rotational movement causing the rotation of an additional electrode 3 and / or active electrode 2 along the axis of rotation R. Advantageously, the jaws 323 can hold a fixed electrode in position.

[0106] According to a separable example, the transit device 30 can be used outside of the installation 1 of the first aspect of the invention, and in particular without systematically implementing chambers equipped with shutters. Thus, generally, at least one rotation module 32a, 32b and at least one translation module 31a, 31b can be used to achieve helical movement in a device other than the installation 1.For example, this device 30 and the corresponding method can be used for any movement of at least one electrode, in particular for a plasma torch; according to one possibility, this includes moving an electrode in a helical motion; preferably this helical motion is produced by two different drives, namely one rotating about the axis of the electrode, the other translating about this axis; according to one possibility, the drives are synchronized for at least one time phase so as to produce a typical helical advance (simultaneous rotation and translation); according to another case, cycles are linked together, each comprising a . rotation phase and a translation phase so as to produce the helical advance sequentially (in this case, the cycles are preferably short - the number of cycles can be between 20 and 40 cycles and are configured so as to achieve in total the same pitch as in the case of a typical helical advance - so as to obtain a pseudo continuous helical advance).

[0107] According to one example, the installation 1 includes at least one detection device 60. Preferably, the installation 1 includes several detection devices 60. At least one detection device 60 can be configured to detect the positions of an additional electrode 3 in the feed chamber 20. At least one detection device 60 can be configured to detect the positions of an additional electrode 3 in the torch chamber 10. Thus, the different opening and / or closing sequences of the first 2111 and second 2121 shutters can be initiated depending on the position of an electrode. Furthermore, this can also determine the activation of the pressure regulator. This can also determine the activation of the first 31a, second 31b translation modules and the first 32a, second 32b rotation modules.

[0108] According to one example, at least one detection device 60 is a presence sensor, for example of an optical nature.

[0109] According to one example, installation 1 comprises three detection devices 60. More specifically, the installation 1 may include two detection devices 60 positioned in the introduction chamber 20 and one device positioned in the torch chamber 10. Preferably, a first detection device 60 is then positioned at the first translation module 31a. This first detection device 60 makes it possible to determine that an additional electrode has been introduced sufficiently to launch the first translation module 31a and move an additional electrode 3 so as to change from the introduction configuration to the transit configuration.

[0110] According to one example, a second detection device 60 is positioned in the introduction chamber 20 at the level of the second shutter 2121. The second detection device 60 thus makes it possible to detect the complete insertion of an additional electrode 3 into the introduction chamber 20 and to switch to the transit configuration and therefore to close the first shutter 2111. Thus, the second detection device 60 is positioned at the level of the outlet 211 of the introduction chamber 20.

[0111] According to one example, a third detection device 60 is positioned in the torch chamber 10 just after the second shutter 2121. The third detection device 60 thus makes it possible to detect the insertion, at least in part, of an additional electrode 3 into the torch chamber 10. More specifically, the third detection device 60 makes it possible to detect the distal end 3b of a additional electrode 3 when it is introduced into the torch chamber 10. Thus, the third detection device 60 allows the installation 1 to be indicated that an additional electrode 3 is in position to be fixed with an active electrode 3 present in the torch chamber 10.

[0112] Advantageously, the third detection device 60 can also be configured to identify the positioning of the proximal end 3a of an active electrode present in the torch chamber 10. This makes it possible to indicate when the recharging of an additional electrode 3 is necessary without stopping the torch.

[0113] Introduction method:

[0114] Another aspect of the present invention relates to a method of loading an additional electrode 3 in the installation 1. The method will now be described with reference to Figures 6A to 6C.

[0115] According to one example, the process thus includes a step of introducing at least one additional electrode 3 through the inlet 211 of the introduction chamber 20.

[0116] The method may then include moving an additional electrode 3 via the transit device 30, from the inlet 211 of the introduction chamber 20 to the outlet 212 of the introduction chamber 20.

[0117] Finally, the method includes introducing an additional electrode 3 into the torch chamber 10.

[0118] Thus, an additional electrode can be positioned in the torch chamber 10 without lowering the pressure in the torch and therefore without stopping the torch.

[0119] According to one example, in the power supply configuration and before the introduction of at least one additional electrode 3, the control unit places the first shutter 2111 in the open position and the second shutter 2121 in the closed position. This allows an additional electrode 3 to be inserted into the introduction chamber 20 without stopping the torch.

[0120] According to one example, the first shutter 2111 and the second shutter 2121 can be manually opened or closed. Thus, the control unit may not be connected to the first 2111 and second 2121 shutters and / or the control unit may include manually operated means such as a lever or a motor start button.

[0121] According to one example, before the step of introducing an additional electrode 3 into the torch chamber 10, the process includes, in a transit configuration, a closing step in which the control unit closes the first shutter 2111. This makes it possible to isolate the introduction chamber 20 after integration of an additional electrode 3 from the outside and therefore not to have to stop the torch.

[0122] According to one example, after the closing step, the process includes a pressurization step to the second pressure P2 by the pressure variator of the introduction chamber 20. This allows the introduction chamber 20 to be placed at a pressure equal to the pressure in the torch chamber 10 and thus allow the insertion of an additional electrode 3 into the torch without stopping it.

[0123] According to one example, after the pressurization step by the pressure regulator, a step of opening the second shutter 2121 is carried out. This step thus allows the introduction of an additional electrode 3 into the torch chamber 10 without interruption of the plasma creation process.

[0124] According to one example, a screwing step is performed after the step of introducing an additional electrode 3 into the torch chamber 10. This screwing step makes it possible to fix the distal end 3b of an additional electrode end-to-end with the proximal end 2a of an active electrode. This screwing step is preferably performed by activating the first rotation module 32b. The screwing step can thus consist of a step of joining the additional electrode 3 with the active electrode 2 to form a single active electrode.

[0125] NUMERICAL REFERENCES 1. Plasma torch installation 10. Torch chamber 20. Introducing chamber 21. Watertight wall 211. Entrance 2111. First shutter 212. Exit 2121. Second shutter 30. Transit device 31. Translation module 31a. First translation module 31b. Second translation module 311. Main tree 312. Gears 313. rolls 32. Rotation module 32a. First rotation module 32b. Second rotation module 321. Main tree 323. Jaws 60. detection device 2. active electrode 2a. Proximal end of active electrode 2b. distal end of active electrode 3. Additional electrode 3a. proximal end of additional electrode 3b. distal end of additional electrode 4. External environment A. longitudinal axis D. axis of movement R. axis of rotation PI. first pressure P2. Second pressure Lp longitudinal dimension of the introduction chamber L2. Longitudinal dimension of an additional electrode

Claims

Demands

1. Plasma torch installation (1) configured to generate a plasma and comprising: • a torch chamber (10) configured to contain at least one active electrode (2), • at least one introduction chamber (20) extending along a longitudinal axis (A) and configured to allow the introduction of at least one additional electrode (3) into the torch chamber (10), • a transit device (30) configured to move an additional electrode (3) from the introduction chamber (20) to the torch chamber (10), characterized in that the at least one introduction chamber (20) comprises a sealed wall (21), the sealed wall (21) comprising an inlet (211) and an outlet (212) forming two distinct openings in the wall (21), the outlet (212) opening into the torch chamber (10),and in that the inlet (211) of at least one inlet chamber (20) comprises a first shutter (2111) configured to close the inlet (211) in a watertight manner and in that the outlet (212) of at least one inlet chamber (20) comprises a second shutter (2121) configured to close the outlet (212) in a watertight manner.

2. Installation (1) according to the preceding claim comprising a control unit, the control unit being configured to selectively position the first shutter (2111) and / or the second shutter (2121) in an open or closed position.

3. Installation (1) according to the preceding claim wherein, in an additional electrode supply configuration (3), the control unit is configured to open the first shutter (2111) and close the second shutter (2121).

4. Installation (1) according to any one of claims 2 or 3, wherein, in a transit configuration of an additional electrode (3), the control unit is configured to close the first shutter (2111) and the second shutter (2121).

5. Installation (1) according to any one of the preceding claims wherein at least one introduction chamber (20) includes a pressure variator, the pressure variator being configured to vary the pressure in the inlet chamber (20).

6. Installation (1) according to the preceding claim in combination with any one of claims 3 and 4, wherein, in the feed configuration, the pressure regulator is configured to bring the inlet chamber (20) to a first pressure (PD-

7. Installation (1) according to claim 4 in combination with any one of the two preceding claims, wherein, in the transit configuration, the pressure variator is configured so as to put the inlet chamber (2) at a second pressure (P2).

8. Installation (1) according to the two preceding claims taken in combination in which the second pressure (P2) is greater than the first pressure (PI).

9. Installation (1) according to any one of the preceding claims, wherein the inlet chamber (20) has a longitudinal dimension (LJ) between its inlet (211) and its outlet (212), the longitudinal dimension (Li) of the inlet chamber (20) being greater than a longitudinal dimension (L2) of an additional electrode (3).

10. Installation (1) according to any one of the preceding claims wherein the transit device (30) comprises at least one translation module (31a, 31b) configured to move along a displacement axis (D) an additional electrode (3) to the torch chamber (10), the displacement axis (D) being parallel to the longitudinal axis (A) of the introduction chamber (20).

11. Installation (1) according to any one of the preceding claims wherein the transit device (30) comprises at least one rotation module (32a, 32b) configured to rotate an additional electrode (3) about an axis of rotation (R), the axis of rotation (R) being coincident with the longitudinal axis (A) of the introduction chamber (20).

12. Installation (1) according to the two preceding claims in combination wherein at least one translation module (31a, 31b) and / or at least one rotation module (32a, 32b) are configured to fix end-to-end a proximal end (2a) of an active electrode (2) and a distal end (3b) of an additional electrode (3) so that together they form a new active electrode.

13. Installation (1) according to any one of the preceding claims in combination with claim 2, comprising at least one detection device (60), preferably several detection devices (60), at least one detection device (60) being configured to detect at least one position of an additional electrode (3) in the introduction chamber (20).

14. Method of loading additional electrode (3) into an installation (1) according to any one of the preceding claims, the method comprising: • introducing at least one additional electrode (3) through the inlet (211) of the introduction chamber (20), • moving the additional electrode (3) via the transit device (30), from the inlet (211) of the introduction chamber (20) to the outlet (212) of the introduction chamber (20), • introducing the additional electrode (3) into the torch chamber (10).

15. A method according to the preceding claim wherein an installation according to claim 2 is used, and wherein in the feeding configuration and before the introduction of at least one additional electrode (3), the control unit places the first shutter (2111) in the open position and the second shutter (2121) in the closed position.

16. A method according to any one of the two preceding claims, wherein an installation according to claim 6 is used, and wherein, prior to the step of introducing the additional electrode (3) into the torch chamber (10), the method includes, in a transit configuration, a closing step in which the control unit closes the first shutter (2111).

17. A method according to the preceding claim, wherein an installation according to claim 5 is used, and wherein, after the closing step, the method comprises a pressurization step at a second pressure (P2) of the introduction chamber (20) by the pressure variator.

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