Plasma torch installation

Abstract

The invention relates to a plasma torch installation (1) comprising a torch chamber (10) capable of containing an active electrode, an introduction chamber (20) extending along a longitudinal axis (A) and allowing the introduction of an additional electrode, and a transit device (30) for moving an additional electrode from the introduction chamber to the torch chamber. The introduction chamber comprises a sealed wall (21), the sealed wall comprising an inlet (211) and an outlet (212) forming two openings in the wall, and the inlet comprises a first shut-off member (2111) and the outlet comprises a second shut-off member (2121) that are configured to respectively close the inlet and the outlet of the introduction chamber in a sealed manner. Transit elements for the additional electrode and a possibility of storing a plurality of additional electrodes in the introduction chamber are presented.

Description

[0001] "Plasma torch installation"

[0002] TECHNICAL FIELD

[0003] 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.

[0004] STATE OF THE ART

[0005] 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 that operate on direct current, in which the electrodes always have the same polarity. There are also plasma generators that operate on three-phase current, with three electrodes, each assigned to a phase, which alternately act as anode and cathode. In such a case, the plasma torch installation consists of 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.

[0006] 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.

[0007] French publication FR3096221A1 discloses a solution that eliminates the need to shut down the torch after an electrode wears out, thanks to a magazine containing multiple additional electrodes. This magazine is configured to move an additional electrode from the magazine to the torch chamber and automatically connect another electrode to the active electrode. However, removing and replacing this magazine likely requires stopping the plasma.

[0008] 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 to accommodate a sufficient number of additional electrodes. Furthermore, it involves a carriage-mounted gripper for moving the electrode to be loaded into the torch, which only has translational movement both within the magazine and within the torch itself. Moreover, when the electrodes are heavy, handling such a magazine is impractical. An object of the present invention is therefore to provide an improved solution for introducing an additional electrode into a plasma torch without stopping or even disrupting operation, that is, without disrupting or even stopping the torch.

[0009] 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.

[0010] SUMMARY

[0011] To achieve this objective, according to one aspect, a plasma torch installation is planned, configured to generate plasma and comprising:

[0012] • a torch chamber configured to contain at least one active electrode,

[0013] • 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,

[0014] • 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.

[0015] Thus, a method is provided for introducing an additional electrode that can be successively charged, by assembly, in continuity with a current active electrode, thereby recovering 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, i.e., without interrupting or even stopping the torch. Furthermore, the installation preferably 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 performed manually by a user or by a robotic system. Simultaneously, the invention is based on recharging using prefabricated additional electrodes.Another aspect of the present invention relates to a method of loading additional electrodes in an installation, the method comprising:

[0016] • the introduction of at least one additional electrode through the inlet of the introduction chamber,

[0017] • a movement of the additional electrode via the transit device, from the inlet of the introduction chamber to the outlet of the introduction chamber,

[0018] • an introduction of the additional electrode into the torch chamber.

[0019] Thus, an additional electrode can be positioned in the torch chamber without lowering the pressure in the torch and therefore without stopping the torch.

[0020] Another separable aspect concerns a plasma torch installation configured to generate plasma and comprising:

[0021] • a torch chamber configured to contain at least one active electrode,

[0022] • 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,

[0023] • 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.

[0024] A method for setting at least one electrode in motion, particularly for a plasma torch, is also described. This method comprises a translational drive of the electrode along its longitudinal axis coupled to a rotational drive about the same axis. The drive coupling can be such that the two movements are simultaneous and preferably synchronous. Alternatively, the coupling can take 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 motion of the electrode, which is particularly useful for assembly with another electrode.

[0025] Another separable aspect concerns a plasma torch installation 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, the transit device being configured to dock the additional electrode to the active electrode and then move an additional electrode via a movement of the active electrode towards the torch chamber.Another separable component is a plasma torch electrode, suitable for use with another electrode, comprising a proximal end and a distal end. The distal end of the electrode has a threaded portion of one type, consisting of a thread and a tap. The proximal end has a threaded portion of the other type, consisting of a thread and a tap, suitable for screwing into a distal portion of the electrode. The proximal portion also has a threaded portion of the other type, consisting of a thread and a tap, suitable for screwing into an electrode holder. The first and second threaded portions may have opposite thread directions.

[0026] Another aspect is an assembly comprising an electrode and an electrode holder.

[0027] BRIEF DESCRIPTION OF THE FIGURES

[0028] 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:

[0029] Figure 1A represents a block diagram showing the environments through which an additional electrode passes.

[0030] Figure 1B represents a block diagram of process steps.

[0031] Figure 2 shows a cross-sectional view of the plasma torch installation.

[0032] Figure 3 shows a cross-sectional view of the introduction chamber.

[0033] Figure 4 shows a top view of a translation module of the transit device.

[0034] Figure 5 shows a top view of a rotation module of the transit device.

[0035] Figures 6A to 6C represent cross-sectional views of the introduction chamber and the steps for introducing an additional electrode.

[0036] Figure 7 illustrates an electrode holder.

[0037] Figure 8 shows an electrode on such a support.

[0038] Figure 9A illustrates one possible implementation of the installation.

[0039] Figure 9B shows a top view of an installation with the cover removed.

[0040] Figures 10A to 10E show different phases of operation of the installation.

[0041] The drawings are provided as examples and are not intended to limit the scope of the invention. They are schematic representations of the 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.

[0042] DETAILED DESCRIPTION

[0043] Before beginning a detailed review of embodiments of the invention, optional features that may possibly be used in combination or alternatively are stated below.

[0044] For example, consider an installation with a control unit configured to selectively open or close the first and / or second shutter. This allows the introduction chamber to be opened and closed. This opening and / or closing mechanism advantageously allows an additional electrode to be introduced into the torch chamber without interrupting plasma production. The pressure in the introduction chamber can be regulated to prevent pressure differentials during the opening and / or closing of the first and / or second shutter.

[0045] As an example, in an additional electrode supply configuration, the control unit is configured to open the first shutter and close the second shutter.

[0046] 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 operational.

[0047] According to one example, in a transit configuration of an additional electrode, the control unit is configured to close the first shutter and the second shutter.

[0048] This transit configuration allows for the introduction of an additional electrode 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.

[0049] 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.

[0050] 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.

[0051] According to an example, in the feed configuration, the pressure regulator is configured to set the inlet chamber to a first pressure P1.

[0052] According to one example, the first pressure P1 is equal to atmospheric pressure.

[0053] In the supply configuration, the pressure regulator thus allows the introduction chamber to be positioned at a pressure with the environment with which it is not isolated, i.e. the outside and therefore at atmospheric pressure.

[0054] According to one example, in a transit configuration, the pressure regulator is configured to put the inlet chamber at a second pressure P2.

[0055] In the transit configuration, the pressure variator allows the pressure in the introduction chamber to be changed from the first pressure P1 to the second pressure P2.

[0056] In one example, the second pressure P2 is equal to the pressure in the torch chamber. The pressure regulator thus makes the feed chamber and the torch chamber isobaric. Therefore, the feed chamber can act as an airlock between the outside and the torch chamber.

[0057] According to an example, the second pressure P2 is greater than the first pressure P1.

[0058] For example, the introduction chamber has a longitudinal dimension between its inlet and outlet, the longitudinal dimension of the introduction chamber being greater than the longitudinal dimension of an additional electrode. This allows the additional electrode to be fully inserted into the introduction chamber before being inserted into the torch chamber.

[0059] 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.

[0060] At least one translation module allows an additional electrode to be moved in one direction and thus introduced into the operating torch chamber.

[0061] 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.

[0062] At least one rotation module allows for the easy introduction of an additional electrode into the torch chamber during operation.

[0063] In 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.

[0064] This allows an active electrode being consumed in the torch chamber to be connected with an additional electrode without stopping the torch.

[0065] Following an example, the transit device includes an active electrode displacement device configured to fix end-to-end a proximal end of the active electrode and a distal end of the additional electrode so that together they form a new active electrode.

[0066] The displacement device may include at least one rotation module configured to rotate the active electrode about its longitudinal axis, which is typically parallel to the longitudinal axis (A) of the introduction chamber.

[0067] According to one mode, the displacement device includes at least one translation module configured to move the active electrode to the additional electrode, typically, the axis of this displacement being parallel to the longitudinal axis (A) of the introduction chamber.

[0068] The installation may be provided for at least one additional electrode having a distal end provided with one of a thread and a tap and for an active electrode having a proximal end provided with the other of a thread and a tap, installation in which the transit device is configured to screw the thread into the tap.

[0069] According to one example, the installation includes a support 7 suitable for being fixed to the proximal end 3a of at least one additional electrode 3. This fixing is preferably complete, i.e. in the form of a recess, and is designed to be removable, i.e. that the support and the electrode can be separated in a non-destructive manner; preferably the fixing is done by screwing.

[0070] The introduction chamber 20 may include a tray 8 configured to fix at least partially the additional electrode 3, in a storage position in the introduction chamber 20, by cooperation of the support 7 and an opening 81 of the tray 8. By "partially" it is understood that the mounting of an additional electrode 3 in a stored manner in the introduction chamber 20 may be completed by elements other than the tray 8.In the illustrated designs, the fixing is preferably complete, i.e. in the form of a fixed mounting, and is designed to be removable, i.e. the support and the plate 8 can be separated in a non-destructive manner; the fixed mounting can be achieved with different mobility blocking elements for example one of the following: a translational stop in one direction for example by an inclined edge of the opening cooperating with an inclined edge of the support; a retractable stop cooperating with a surface of the support to stop it in translation for example in another direction; a rotational blocking surface for example with flat shapes cooperating for the lateral surface of the opening and the lateral surface of the support.

[0071] Depending on the option, the introduction chamber is configured to store a plurality of additional electrodes. These can be loaded successively into this chamber, which is simple in terms of handling.

[0072] In one instance, the tray 8 has several openings 81, each configured to cooperate with the holder 7 of a different supplementary electrode 3. The tray 8 is movable, preferably rotatable, so as to selectively position a supplementary electrode 3 opposite the inlet 211 and / or the outlet 212 of the feed chamber 20. The feed chamber 20 can thus store a plurality of supplementary electrodes 3, preferably in parallel. The supplementary electrodes 3 can be, on the one hand, successively fed into the chamber 20; and on the other hand, successively delivered to the torch chamber 10. In one possibility, this successive delivery is carried out in such a way as to empty the feed chamber 20 without reopening the inlet 211 in an intermediate manner. One supplementary electrode can be loaded into the chamber, the tray rotated, then another electrode loaded, and so on.The rotation of the platform (or other suitable movement) allows an electrode receiving area (of the platform) to be successively placed in view of the inlet 211.

[0073] According to one option, the support 7 includes a threaded area, preferably a thread 73, suitable for cooperating by screwing, in a second direction of screwing opposite to the first direction of screwing, with a first threaded portion, preferably respectively a tapping 3c, of the proximal end 3a of the additional electrode 3. This may be a screwing by right-hand thread for the first direction, and left-hand thread for the second direction.

[0074] Optionally, the active electrode 2 displacement device is configured to unscrew the additional electrode 3 from the support 7 simultaneously or after the proximal end 2a of the active electrode 2 and the distal end 3b of the additional electrode 3 have been joined together. The same device can be used in this way to assemble two successive electrodes and to remove the electrode thus assembled from its support 7.

[0075] In one example, the installation includes at least one detection device, preferably several detection devices, with at least one detection device configured to detect at least one position of an additional electrode in the inlet chamber. This allows the various opening and / or closing sequences of the first and second gates to be initiated. It can also be used to determine the activation of the pressure regulator.

[0076] According to an 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.

[0077] This allows an additional electrode to be inserted into the introduction chamber without stopping the torch.

[0078] According to one example, before the step of introducing the additional electrode into the torch chamber, the process includes, in a transit configuration, a closing step in which the control unit closes the first shutter.

[0079] 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.

[0080] As an example, after the closing step, the process includes a pressurization step to a second pressure P2 by the pressure regulator of the feed chamber. This allows the feed chamber to be brought to a pressure equal to the pressure in the torch chamber, thus enabling the insertion of an additional electrode into the torch without stopping it.

[0081] 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.

[0082] The term "plasma torch" 12 can also include induction plasma torches.

[0083] 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.

[0084] 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.

[0085] Initially, figures 1A and 1B represent block diagrams enabling understanding of the movement of an additional electrode 3 in an installation 1 according to the invention.

[0086] According to the first aspect, a plasma torch installation 1 is planned, configured to generate a plasma. Installation 1 will be described later with reference to Figures 1A to 3.

[0087] 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 in 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-forming gas present in the torch chamber 10. Thus, the torch chamber 10 may have a regulated pressure to manage the plasma-forming gas present in the torch chamber 10. The installation 1 comprises at least one feed chamber 20. Preferably, and in the case of a three-phase installation, the installation 1 comprises three feed 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.

[0088] In the following description, and without limitation, reference will be made to a single introduction chamber 20, each introduction chamber 20 of the installation 1 being identical to the others.

[0089] 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.

[0090] 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 installation 1 allows the creation of plasma to continue continuously without disrupting operations.

[0091] To achieve this, the introduction chamber 20 advantageously includes 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. Therefore, 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.

[0092] Advantageously, the sealed wall 21 includes an inlet 211 and an outlet 212. The inlet 211 and 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 outlet 212 thus allow the introduction of an additional electrode from an external environment 4 into the torch chamber 10.

[0093] The introduction chamber 20 also includes a first shutter 2111. More precisely, 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.

[0094] Similarly, the feed chamber 20 includes a second shutter 2121. More precisely, the outlet 212 of the feed 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 feed chamber 20 from the torch chamber 10. More precisely, in the closed position, the second shutter 2121 maintains the pressure within the feed chamber 20.

[0095] The introduction chamber 20 thus acts as an airlock, allowing the introduction of an additional electrode 3 without disrupting operation, i.e., without interrupting or even stopping the torch. Therefore, the first shutter 2111 and the second shutter 2121 cannot be in the open position simultaneously. Furthermore, the installation 1 preferably prevents pressure drops in the torch chamber 10 during 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.

[0096] As an 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.

[0097] As an 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 chosen from, for example, lip seals or seals for gate valves.

[0098] As an example, installation 1 includes a control unit. The control unit is not shown in the figures, but is not limited to other configurations. The control unit can 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. In effect, 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 for the introduction of an additional electrode into the torch chamber 10 without interrupting plasma production. This is because the pressure can then be regulated in the introduction chamber 20 to prevent pressure differentials from occurring during the opening and / or closing of the first 2111 and / or second 2121 shutters.

[0099] 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 performed by a user by manually controlling the shutters according to the opening and closing sequences described here; 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 manual action).

[0100] For example, in an additional electrode 3 feed configuration, the control unit will open the first shutter 2111. This allows an additional electrode 3 to be introduced into the feed chamber 20. Simultaneously, the control unit closes the second shutter 2121. Thus, the pressure in the feed 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 system 1, specifically into the feed chamber 20, without interrupting the operation of the plasma torch.

[0101] As an example, following an electrode feeding configuration, the installation 1 transitions to a transit configuration. In the transit configuration for 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 the additional electrode 3 to be introduced along its entire length into the introduction chamber 20.

[0102] 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.

[0103] Furthermore, closing the first shutter 2111 allows the introduction chamber 20 to be isolated from the external environment 4 and closing the second shutter 2121 allows the introduction chamber 20 to be isolated from the torch chamber 10.

[0104] As an 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 match the environment from which it will not be isolated.

[0105] For example, a pressure regulator can include a solenoid valve, such as a hydraulic one. The pressure regulator can then reduce the upstream pressure to a desired downstream pressure. The pressure regulator can, for instance, be controlled by a controller, such as a PLC (Programmable Logic Controller).

[0106] For example, when the first shutter 21 is opened, the inlet chamber 20 has a first pressure P1. This first pressure P1 can be the same as the pressure outside the installation 1. Thus, simply opening the first shutter 21 causes a change in the pressure inside the inlet chamber 20 to reach the first pressure P1. This first pressure P1 can then be equal to atmospheric pressure.

[0107] Thus, when the first shutter 2111 is open, the pressure regulator can set the inlet chamber 20 to a first pressure P1. Similarly, in the feed configuration, the pressure regulator can be configured to set the inlet chamber 20 to the first pressure P1.

[0108] Similarly, when the first shutter 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.

[0109] In one example, the second pressure P2 is equal to the pressure in the torch chamber. Thus, before the second shutter 2121 is opened and the additional electrode 3 is introduced 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.

[0110] In an example, the second pressure P2 is greater than the first pressure P1. The second pressure P2 can be between 2 and 10 MPa, preferably between 3 and 6 MPa.

[0111] In one example, the transit device 30 includes at least one translation module 31a, 31b. This at least one translation module 31a, 31b can then be configured to move, along a displacement axis D, an additional electrode 3 to the torch chamber 10. The displacement axis D is parallel to the longitudinal axis Li of the feed chamber 20. This at least one translation module 31a, 31b allows the additional electrode 3 to be moved in a specific direction and thus introduced into the torch chamber 10 during operation. In another example, the transit device 30 includes a first and a second translation module 31a, 31b. The first translation module 31a is, in one example, positioned in the feed chamber 20. The first translation module 31a thus allows the additional electrode 3 to be moved into the feed chamber 20.More specifically, it can be positioned so that, upon insertion of an additional electrode 3, 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 insertion chamber 20 and the first translation module 31a is less than or equal to, and preferably less than, the longitudinal dimension L2 of an additional electrode 3. As an example, the insertion of an additional electrode 3 into the insertion chamber 20 can be performed manually. The insertion can therefore be carried out by an operator. Advantageously, the insertion of an additional electrode 3 can also be performed by a robotic arm. This allows the task to be automated if it needs to be performed at times when no operator is available.

[0112] 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 precisely, 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 the new active electrode 2, composed of the additional electrode 3 and the old active electrode 2, along the displacement axis D, 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 Li of an additional electrode 3 from the first translation module 31a.

[0113] Advantageously, the first and second translation modules 31a, 31b are controlled by the control unit. The control unit can 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.

[0114] As an example, the two translational moduli 31a and 31b are identical. The translational moduli 31a and 31b will now be described with reference to Figure 4.

[0115] In one example, the first translation module 31a and the second translation module 31b each include a main shaft 311. The main shaft 311 can then be configured to be connected to the control unit. The control unit can thus 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. Rotating the main shaft 311 about an axis parallel to the travel axis D then causes the rollers 313 to rotate about an axis perpendicular to the travel axis D. The rollers 313 can then perform a rotational movement that causes the additional electrode 3 and / or active electrode 2 to move along the travel axis D.

[0116] For example, rollers 313 are conical in shape. More precisely, rollers 313 consist of two cones or truncated cones joined at their apexes. The cavity formed by these two conical parts can accommodate the wall of an electrode and creates contact points capable of holding the electrode and, if the rollers are moving, transmitting that movement to it.

[0117] According to one example, the transit device 30 includes at least one rotation module 32a, 32b. This at least one rotation module 32a, 32b can then be configured 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.

[0118] 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 precisely, 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 precisely, 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 with an additional electrode 3 without stopping the torch.

[0119] According to one example, when the additional electrode 3 is introduced into the torch chamber

[0120] 2. The 32a rotation module can be activated to rotate the additional electrode.

[0121] 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 translate. Thus, the second rotation module 32b can apply pressure to the active electrode 2 so as to hold the active electrode 2 fixed. The combination of translational movement with rotational movement can result in helical movement.The helical movement can then have the same pitch as the thread / tap of the additional electrode 3 / active electrode 2.

[0122] In 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 connection of the supplementary electrode 3 with the active electrode 2. In one example, the rotational and translational movements are continuous.Preferably, to allow butt-to-end attachment 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.

[0123] In 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 (e.g., less than 1 mm of translation and less than 1° of rotation per increment), and these sequences are repeated as needed to secure the electrodes.

[0124] In 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 within the torch chamber 10, thereby allowing erosion of the active electrode 2 within the torch chamber 2 and thus enabling plasma production. Surprisingly, the rotation of the active electrode 2 can also 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, and preferably equal to, the longitudinal dimension Li of an additional electrode 3 from the first rotation module 32a.

[0125] Advantageously, the two rotation modules 32a, 32b are controlled by the control unit. The control unit can 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 and second shutters 2111 and 2121.

[0126] As an example, the two rotational moduli 32a and 32b are identical. The rotational moduli 32a and 32b will now be described with reference to Figure 5.

[0127] In 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 and 32b and the main shaft 311 of the translation modules 31a and 31b can be a single rotation shaft. Thus,The control unit can actuate or not the main shaft 321. Actuating 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. Rotation of the main shaft 321 about an axis parallel to the axis of travel D then causes the jaws 323 to rotate about the axis of rotation R. The jaws 323 can then perform a rotational movement that causes the additional electrode 3 and / or active electrode 2 to rotate about the axis of rotation R. Advantageously, the jaws 323 can hold a fixed electrode in position. 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 the systematic implementation of chambers equipped with shutters. Thus, in general,At least one rotation module 32a, 32b and at least one translation module 31a, 31b can be used to achieve helical motion in a device other than 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; in one possibility, this includes moving an electrode helically; preferably, this helical motion is produced by two different drives, namely one rotating about the electrode axis and the other translating about this axis; in one possibility, the drives are synchronized for at least one time phase so as to produce a typical helical advance (simultaneous rotation and translation); in another case,Cycles are linked together, each comprising a rotation phase and a translation phase, in order 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).

[0128] In one example, installation 1 includes at least one detection device 60. Preferably, 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 based 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.

[0129] According to one example, at least one detection device 60 is a presence sensor, for example of an optical nature.

[0130] According to one example, the installation 1 includes 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.

[0131] 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.

[0132] In 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 enables the detection of the insertion, at least partially, of an additional electrode 3 into the torch chamber 10. More precisely, the third detection device 60 enables the detection of the distal end 3b of an additional electrode 3 as it is introduced into the torch chamber 10. Thus, the third detection device 60 enables 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.

[0133] 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.

[0134] Introduction method:

[0135] 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.

[0136] 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.

[0137] The process can 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.

[0138] Finally, the process includes the introduction of an additional electrode 3 into the torch chamber 10.

[0139] 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.

[0140] According to one example, in the feed 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.

[0141] As an example, the first shutter 2111 and the second shutter 2121 can be manually opened or closed. Therefore, 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.

[0142] 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 the integration of an additional electrode 3 from the outside and therefore not to have to stop the torch.

[0143] 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.

[0144] As an example, after the pressurization step using the pressure regulator, a step is performed to open the second shutter 2121. This step allows the introduction of an additional electrode 3 into the torch chamber 10 without interrupting the plasma generation process.

[0145] In one example, a screwing step is performed after the introduction of an additional electrode 3 into the torch chamber 10. This screwing step secures the distal end 3b of the additional electrode to 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 joining the additional electrode 3 to the active electrode 2 to form a single active electrode.

[0146] Figure 7 shows an embodiment in which a support 7 is provided for mounting an electrode in the introduction chamber 20. In the example shown, the support 7 comprises a body at the distal end of which a threaded portion is present, here in the form of a thread 73. Above the thread 73, a stop surface 72 is provided to bear against the upper end of the electrode with which the support 7 will cooperate. The support 7 can be used to mount an electrode in a part of the installation and can participate in the successive stages of electrode movement. In particular, the support 7 can be used to mount the electrode on a platform that can receive one or more electrodes of this type, each with its own support 7.In this situation, the support 7 can retain the electrode relative to the platform, in particular via a surface serving as a support edge 71 capable of cooperating with a border surface 82 of the platform 8, as will be explained later with reference to Figure 9B.

[0147] The support 7 also includes an upper surface 74 and a lateral surface 75, the usefulness of which will be presented later with reference to figure 9B.

[0148] Figure 8 illustrates the interaction between the support 7 and an electrode, in this example an additional electrode 3 to be placed in the introduction chamber 20. More specifically, the thread 73 of the support 7 is screwed into a second threaded portion 3c that forms the proximal end 3a of the electrode 3 in this embodiment. The electrode 3 can thus comprise two threaded portions, possibly two tapped holes, with a first portion serving for connecting the electrode to another electrode end-to-end and a second portion serving for connecting the electrode to the support 7. In the case of two tapped holes, the one serving for connection with the support 7 is preferably located at the bottom of the first tapped hole, with a smaller diameter.Advantageously the two threaded portions have opposite threads; this allows for example the unscrewing of the threaded part 73 of the support 7 when the additional electrode is screwed onto another electrode, typically the active electrode 2 as explained later.

[0149] Figure 9A shows a portion of the installation 1 with a partially shown introduction chamber 20 configured to receive one or more additional electrodes 3. The explanations given with reference to the previously described embodiments are applicable here mutatis mutandis. One possibility offered by this embodiment is to allow the placement of one or more additional electrodes 3 in the introduction chamber 20 before transferring one or more additional electrodes 3 to the torch chamber 10. In one example, the introduction chamber 20 includes a rotating platform 8 configured to mount one or more additional electrodes parallel to each other and preferably parallel to the axis of rotation R.Preferably, the plate 8 is mounted to rotate about an axis parallel to the axis R and driven in rotation by means of a rotation control 85 which may include a motor and a power transmission device to the plate 8, for example with gears.

[0150] A plurality of additional electrodes 3 can thus be stored in parallel within the volume of the introduction chamber, and the platform 8 can be moved to modify their position in the introduction chamber 20, in particular to selectively place an additional electrode 3 opposite the inlet 211 of the introduction chamber 20 and / or opposite the outlet 212 of the chamber 20. As before, a first shutter 2111 is present at the inlet 211, for example in the form of a removable cover. Similarly, a second shutter 2121 is present at the outlet 212, for example in the form of a guillotine valve actuated by a handle 91.

[0151] Figure 9B shows a top view of such an introduction chamber 20 with the inlet 211 through which the rotating platform 8 is partially visible. The latter has openings 81 through which an electrode can be slid. Each opening 81 includes a rim 82 around its periphery to ensure cooperation with the support edge 71 so as to stop the electrode 3 at the end of its insertion. The opening 81 also includes a flat 83 on its lateral wall to cooperate with a flat surface formed on the lateral surface 75 of the support 7; in general, this embodiment is a possibility allowing cooperation between the support 7 and the platform 8 to immobilize the support in rotation relative to the platform.

[0152] Also, the upper surface 74 of the support 7 can be immobilized by the top of the opening at 81 by means of a translation stop 84, for example in the form of a retractable finger that can be positioned in contact with the upper surface. In one possibility, the combination of the translation stop 84, the flat 83, and the rim 82, in cooperation with the corresponding part of the support 7, ensures complete immobilization of this support 7, and consequently of the electrode mounted on this support 7, relative to the plate 8.

[0153] Figures 10A to 10E present an alternative embodiment of the transit of an additional electrode to the examples given previously. The example in Figures 10A to 10E is given in the context of the introduction chamber 20 explained in Figures 9A and 9B, but can be applied mutatis mutandis to the preceding examples.

[0154] It should be noted that in Figures 10A to 10E, as in other figures, the introduction chamber 20 is shown vertically for convenience, but it can be oriented in other directions depending on the installation requirements relative to the complete setup. Figure 10A shows a situation in which the cover serving as the first shutter 2111 has been removed to allow the placement of an additional electrode 3 within the introduction chamber 20. This insertion is carried out by inserting the additional electrode 3 through an opening 81 in the tray 8 accessible via the inlet 211 of the chamber 20. The support 7 on which the additional electrode 3 is mounted in this example allows the electrode 3 to be immobilized relative to the tray 8 at the end of the insertion.As in previous cases, this introduction of a new electrode 3 does not interfere with the operation of the plasma torch because the torch chamber 10 can still be in operation thanks to the closed retention of the second shutter 2121.

[0155] It should be noted that the introduction chamber 20 may only receive one additional electrode 3, in which case the plate 8 is not necessarily rotating; it may simply serve to temporarily immobilize the additional electrode 3 by means of its support 7 in the introduction chamber 20 before its transit to the torch chamber 10.

[0156] The illustrated example reflects an introduction chamber 20 that, conversely, allows for the occupancy of a plurality of additional electrodes 3 thanks to a plurality of openings 81 in the tray 8. In this case, the tray 8 rotates so that one of the additional electrodes can be positioned in correspondence with the inlet 211 and outlet 212 zones during the operating phases, at inlet and transit. This is represented in Figure 10B with the arrow 92 schematically indicating a rotation of the tray 8 around an axis parallel to the longitudinal axis of the electrodes 3. A single loading phase of the introduction chamber provides a stock of additional electrodes 3 that can successively be used to recharge the active electrode 2 without reopening the inlet 211 of the introduction chamber 20.After loading the additional electrode(s) 3, the first shutter (for example a cover) is closed to make chamber 20 airtight again.

[0157] Figures 10A to 10E show an embodiment in which the inlet 211 and the outlet 212 are aligned parallel to the longitudinal axis of the additional electrodes 3. This arrangement is not mandatory; in particular, the inlet 211 and the outlet 212 may be angularly offset. In this case, the plate 8 will be rotated after the introduction of the additional electrode in question, and before its passage to the torch chamber 10.

[0158] Figure 10C presents an example of transferring an additional electrode 3 into transit as an alternative to the previously described transit device examples. In particular, this example uses the active electrode 2 as a means of transmitting the transit motion of the additional electrode 3. More specifically, the installation 1 in this example may include a device for rotating and translating the active electrode 2, for example, in the form of a translation module 93 enabling the active electrode 2 to move along its longitudinal axis and in the form of a rotation module 94 enabling the active electrode 2 to rotate in its own direction.As with the embodiment of the movement of the additional electrode 3, particularly visible in Figure 3, the association of a rotation module and a translation module for the movement of the active electrode allows for the control of potentially different movement phases and advantageously a helical movement phase for the active electrode 2. In another case, these two modules can be replaced by a single module creating a helical movement.

[0159] We can refer to the implementation examples given for translation module 31 and translation module 32 for the training of modules 93 and 94, respectively.

[0160] In the illustration in Figure 10C, the active electrode 2 is set in motion while the second shutter 2121 is in the open position (outlet 212 open), moving it towards the introduction chamber 20 until it approaches the distal end of the opposing supplementary electrode. This movement phase can be achieved by pure translation using module 93 or by a combination of rotational and translational movements by combining modules 93 and 94. The objective is then to fix the distal end of the supplementary electrode 3 and the proximal end of the active electrode 2 end-to-end via their complementary threaded sections, one a threaded section, the other a tapped section. This fixing is accomplished by continuing the movement of the active electrode 2 towards the supplementary electrode 3, by a helical movement that allows the threaded sections to be screwed in.Such a movement is shown schematically by arrow 95 in figure 10C.

[0161] When this screwing action reaches the end of its travel, and given that the support 7 is prevented from rotating, the continuation of this helical movement leads to the unscrewing of the thread 73 of the support relative to the additional electrode 3, thus freeing the additional electrode from this support 7. More precisely, when the screwing of the active electrode 2 onto the additional electrode 3 is complete (detected by a sensor, for example), resulting from the combined rotational movement of the rotation module and the upward translational movement of the translation module, the translation module changes direction (downward movement) while the rotation module continues its rotation in the same direction. This allows the additional electrode 3 to be unscrewed from its support 7 via the helical fastening, which is reversed compared to the fastening of the electrodes themselves.The additional electrode 3, now attached only to the active electrode 2, is then driven by the latter by means of the transit device, specifically modules 93 and 94, as illustrated by arrow 96 in Figure 10D. As before, the case of a helical downward movement of this pair of electrodes 2, 3 has been shown, but a purely translational movement could suffice. Indeed, the objective is then to move this assembly through the torch chamber 10 in order to completely remove the additional electrode 3 from the introduction chamber 20, then to close the shutter 2121 and start a new reloading process if necessary. Figure 10E shows a phase where the obturator 2121 A was closed and where the tray 8 underwent an additional rotation 92 to place a new additional electrode 3 opposite the outlet 212 of the introduction chamber 20, awaiting its transit.Note that the active electrode 2 is not shown in this figure, for simplicity, nor in figures 10A and 10B. As in the other examples, chambers 10, 20 can be opened and closed by the shutters in operating phases that preserve the operation of the torch.

[0162] DIGITAL REFERENCES

[0163] 1. Plasma torch installation

[0164] 10. Torch chamber

[0165] 20. Introducing chamber

[0166] 21. Watertight wall

[0167] 211. Entrance

[0168] 211 1. First shutter

[0169] 212. Exit

[0170] 2121. Second shutter

[0171] 30. Transit device

[0172] 31. Translation module

[0173] 31 a. first translation module

[0174] 31 b. second translation module

[0175] 311. Main tree

[0176] 312. Gears

[0177] 313. rolls

[0178] 32. Rotation module

[0179] 32a. First rotation module

[0180] 32b. Second rotation module

[0181] 321. Main tree

[0182] 323. Jaws

[0183] 60. detection device

[0184] 2. Active electrode

[0185] 2a. Proximal end of active electrode

[0186] 2b. distal end of active electrode

[0187] 3. Additional electrode

[0188] 3a. proximal end of additional electrode

[0189] 3b. distal end of additional electrode

[0190] 4. External environment

[0191] A. longitudinal axis

[0192] D. axis of movement

[0193] R. axis of rotation

[0194] P1. First pressure

[0195] P2. Second pressure

[0196] Li. longitudinal dimension of the introduction chamber l_2. longitudinal dimension of an additional electrode

[0197] 7. Support

[0198] 71. Support edge

[0199] 72. Stop surface

[0200] 73. Thread 74. Upper surface

[0201] 75. Lateral surface

[0202] 3c. Second portion of fillet

[0203] 8. Turntable 81. Opening

[0204] 82. Border

[0205] 83. Dish

[0206] 84. Stop in translation

[0207] 85. Rotary control 91. Valve

[0208] 92. Rotation of the turntable 8

[0209] 93. Translation Module

[0210] 94. Rotation module

[0211] 95. Helical motion 96. Helical motion

Claims

Demands 1. Plasma torch installation (1) configured to generate 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 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 separate openings in the wall (21), the outlet (212) opening into the torch chamber (10), and in that the inlet (211) of at least one introduction chamber (20) comprises a first shutter (2111) configured to close the inlet (211) in a sealed manner and in that the outlet (212) of at least one introduction chamber (20) comprises a second shutter (2121) configured to close the outlet (212) in a sealed 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 so as 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 inlet chamber (20) comprises 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 supply configuration, the pressure variator is configured to set the inlet chamber (20) to a first pressure (P1).

7. Installation (1) according to claim 4 in combination with any one of the two preceding claims, wherein, in the transit configuration, the drive pressure is configured so as to put the introduction 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 (P1).

9. Installation (1) according to any one of the preceding claims, wherein the inlet chamber (20) has a longitudinal dimension (Li) 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 (31 a, 31 b) 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) around a rotation axis (R), the rotation axis (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 the active electrode (2) and a distal end (3b) of the additional electrode (3) so that together they form a new active electrode.

13. Installation (1) according to any one of claims 1 to 9, wherein the transit device comprises an active electrode displacement device (2) configured to fix end-to-end a proximal end (2a) of the active electrode (2) and a distal end (3b) of an additional electrode (3) so that together they form a new active electrode.

14. Installation (1) according to the preceding claim, wherein the displacement device comprises at least one rotation module (94) configured to rotate the active electrode (2) around its longitudinal axis.

15. Installation (1) according to any one of the two preceding claims, wherein the displacement device comprises at least one translation module (93) configured to move along a displacement axis (D) the active electrode (2) to the additional electrode (3).

16. Installation (1) according to any one of claims 13 to 15, for at least one additional electrode (3) having a distal end (3b) having one of a thread and a tap and for an active electrode (2) having a proximal end (2a) having the other of the thread and the tap, the transit device is configured to screw the thread into the tap in a first direction of screwing.

17. Installation according to any one of claims 13 to 16, comprising a support (7) suitable for being attached to the proximal end (3a) of at least one additional electrode (3), and in which the introduction chamber (20) comprises a tray (8) configured to fix at least partially the additional electrode (3), in a storage position in the introduction chamber (20), by cooperation of the support (7) and an opening (81) of the tray (8).

18. Installation according to the preceding claim, wherein the tray (8) has several openings (81) each configured to cooperate with the support (7) of a different additional electrode (3), the tray (8) being movable, preferably rotationally, so as to selectively position an additional electrode (3) opposite the inlet (211) and / or outlet (212) of the introduction chamber (20).

19. Installation according to any one of the two preceding claims in combination with claim 16, wherein the support (7) comprises a threaded area, preferably a thread (73), capable of cooperating by screwing, in a second direction of screwing opposite to the first direction of screwing, with a first threaded portion, preferably respectively a tapping (3c), of the proximal end (3a) of the additional electrode (3).

20. Installation according to the preceding claim, wherein the active electrode displacement device (2) is configured to unscrew the additional electrode (3) from the support (7) simultaneously or after butting the proximal end (2a) of the active electrode (2) and the distal end (3b) of the additional electrode (3).

21. 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).

22. A method for loading an additional electrode (3) in an installation (1) according to any one of the preceding claims, the method comprising: • the introduction of at least one additional electrode (3) through the inlet (21 1) of the introduction chamber (20), • a displacement of 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), • an introduction of the additional electrode (3) into the torch chamber (10).

23. 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.

24. A method according to either of the two preceding claims, wherein an installation according to claim 6 is used, and wherein before the introduction step of the additional electrode (3) in the torch chamber (10), the process includes, in a transit configuration, a closing step in which the control unit closes the first shutter (2111).

25. A method according to the preceding claim in which an installation according to claim 5 is used, and in which after the closing step, the method includes a step of pressurizing the inlet chamber (20) to a second pressure (P2) by the pressure variator.

Images