Cleaning device and cleaning process

Abstract

A cleaning device (1) suitable for cleaning elements extending along a surface to be cleaned, such as heat exchanger cooling elements, said device comprising: a) a base frame (2), b) a telescopic mast (3), c) a mechanical interface system (4) configured to maintain the proximal segment (30) to the base frame (2), d) a line for a cleaning fluid, e) a nozzle rack comprising at least one spray nozzle, f) a motorized mechanism configured to move the mast from the position between the retracted (PR) and extended positions, in both the extension and retraction directions. (Shortcut Figure: Figure 3)

Description

Title of the invention: Cleaning device and cleaning method

[0001] This disclosure relates to a mobile surface cleaning device and a cleaning method employing such a cleaning device. Technical field

[0002] In industrial applications, fluid / air (steam / air, water / air) heat exchangers are commonly used to cool or even condense a fluid. Often, the fluid to be cooled circulates in cooling tubes, the outside of which is fitted with fins to increase the surface area for heat exchange with the air.

[0003] In use, however, fouling of the tubes at their interface with the air is observed, and more specifically fouling in the spaces between the fins, areas that are particularly difficult to clean. This fouling impairs the performance of the heat exchanger, and it is recommended to periodically clean the cooling tubes. Previous technique

[0004] Various cleaning devices designed for this purpose are known from the prior art. For example, a device is known from document EP-1,604,164, which comprises a trolley with a nozzle-holder rack arranged to be movable along the longitudinal direction of the cooling tubes of heat exchangers. This trolley is equipped with a nozzle-holder rack with several spray nozzles. During operation, the nozzle-holder rack sprays a pressurized cleaning fluid onto the cooling tubes, the rack being moved along the tubes during cleaning. This trolley with a nozzle-holder rack is movable along a polygonal guide profile that serves as a guide for the trolley, suspended from the latter.

[0005] This device also includes a second carriage, called a support carriage, which is movable in a direction orthogonal to the direction of the polygonal guide profile. This support carriage comprises the polygonal profile and brackets equipped with wheels, and allows the support carriage to move in a direction orthogonal to the direction of the polygonal profile. This support carriage therefore also supports the nozzle-holder rack carriage, which is thus movable in both directions so that the nozzle-holder rack can sweep the entire surface of the heat exchanger to be cleaned.

[0006] A mobile surface cleaning device, particularly for cleaning heat exchanger cooling elements, is also known from document FR 2.955.651 B1 of the present Applicant, which comprises, like document EP-1.604.164: - a trolley with a nozzle rack, intended to be positioned in a movable manner in relation to the surface to be cleaned, carrying a nozzle rack, with at least one nozzle, - a guide profile on which the said trolley with a nozzle rack moves, serving as a path for the said trolley when it moves in the direction of the said guide profile. - a flexible conduit for a cleaning fluid supplying said nozzle rack, - motorization means and transmission means to operate the nozzle rack trolley as it moves along the guide profile.

[0007] Document FR 2.955.651 B1 is notable in that: - the flexible conduit is provided internally at least at the level of said guide profile, capable of sliding in said guide profile during the movement of said trolley with nozzle-carrying rack, - said guide profile has a longitudinal opening opposite said nozzle holder rack allowing the circulation of cleaning fluid from said flexible pipe, internal to said guide profile, towards said nozzle holder rack, - said transmission means consist essentially of said flexible conduit which combines a conveying function for a cleaning fluid and a transmission function for the movement of said nozzle rack trolley, said motorization means cooperate with said flexible conduit to push or on the contrary pull said flexible conduit in the guide profile, and thus move the nozzle rack trolley along said guide profile.

[0007] In general, and as explained in document FR 312424AA1, the guide profile serving as a guide to the rack can typically be of significant dimensions greater than 10 meters, extends along the inclined or horizontal slope of the surface of the exchanger and can typically be supported and guided by lower and upper rails at the bottom and top of the surface of the exchanger to be cleaned.

[0008] During cleaning, the nozzle rack carriage is moved along the direction of the guide profile, but the guide profile itself, mounted on a second carriage, can also be moved horizontally along the rails, and as taught in particular by WO2023 / 247840.

[0009] Figure 1 of the present application illustrates such a prior art in which the guide profile, designated PFG, along which a nozzle-carrying rack trolley moves, extends along the slope of the surface to be cleaned, this guide profile PFG itself being made to move along upper and lower rails Rsup and Rinf, positioned above and below the surface of the exchanger

[0010] On some sites, such a solution is not entirely satisfactory due to certain constructions which limit the movement of the guide profile along the rails, in particular props, often called braces by those skilled in the art, which form obstacles to the movement of the guide profile, and which require the use of several cleaning devices on both sides of said obstacle, following the direction of the rails to ensure the cleaning of the surface of the interchange on both sides of said obstacle. Summary

[0011] This disclosure improves the situation.

[0012] According to a first aspect, a cleaning device is proposed that is suitable for cleaning elements extending along a surface to be cleaned, such as heat exchanger cooling elements, said device comprising: a) a base frame intended to rest on a support surface, b) a telescopic mast comprising a plurality of telescopic segments including a proximal segment and a distal segment, and optionally one or more intermediate segments, the telescopic mast configured to move from a retracted position in which the telescopic segments are retracted into one another to a deployed position of the telescopic mast in which the segments are deployed relative to one another, c) a mechanical interface system configured to maintain the proximal segment to the base frame, and thus the mast cantilevered from the base frame,d) a line for a cleaning fluid guided along the telescopic mast, e) a nozzle rack comprising at least one spray nozzle, said nozzle rack fixed to the distal segment of the telescopic mast cantilevered from the base frame at least in the deployed position of the telescopic mast, the nozzle(s) hydraulically connected to the line, generating at least one spray stream in a direction transverse to the axial direction of the mast, f) a motorized mechanism configured to move the mast from the position between the retracted and deployed positions, in the direction of deployment and in the direction of retraction of the mast, and in which said cleaning device is configured to ensure the cleaning of the elements along the surface to be cleaned, by supplying the line with a cleaning fluid, under pressure, so as to generate a spray of a cleaning fluid stream,following the transverse direction of the telescopic mast, and activating the motorized mechanism to deploy the telescopic mast cantilevered from the base frame in order to ensure the movement of the nozzle rack generating the spray flow along the surface to be cleaned.

[0013] The features described in the following paragraphs may optionally be implemented independently of each other or in combination with each other.

[0014] According to one embodiment, the telescopic mast extends along an axial direction of the mast at least along a horizontal component, and possibly along a vertical component, cantilevered from the base frame from the proximal segment to the distal segment, capable of flexing under the action of gravity on the nozzle rack, the proximal, distal and possibly intermediate segments, the segments being able to be formed by profiles, preferably of thickness less than or equal to 2 mm, and in which the nozzle(s) are oriented downwards configured so that the quantity of motion generated by the water sprayed by the nozzle(s) exerts an action opposing the action of gravity on the nozzle rack configured to ensure a gap between the nozzle rack and the elements of the surface to be cleaned, without contact with the surface to be cleaned.

[0015] According to one embodiment, said cleaning device includes a means for adjusting the flow of pressurized fluid conveyed by said fluid line to the nozzle rack, comprising a motor-pump unit including a mechanical pump and an electric motor driving the pump, as well as control electronics including a frequency inverter, configured to allow adjustment of the pump rotation speed.

[0016] According to one embodiment, the nozzle rack includes a support system, comprising one or more pads, extending substantially along a plane parallel to the axial axis of the mast, below the nozzle(s), or one or more rolling elements, and the support system or the rolling element(s) being configured to bear against the surface to be cleaned in the event that an action generated by said quantity of motion generated by the water sprayed by the nozzles is insufficient to maintain a gap without contact with the surface to be cleaned, and the pad(s) configured to slide on the surface to be cleaned during the deployment of the telescopic mast or the rolling element(s) configured to roll on the surface to be cleaned during the deployment of the telescopic mast.

[0017] According to one embodiment, the base chassis may be a trolley comprising casters configured to move said device along a horizontal surface, and anchoring means configured to immobilize the base chassis, and / or the proximal segment, to at least one surface of the environment. In particular, the anchoring means comprise one or more magnetic suction cups configured to transition from an activated state, designed to anchor to one or more ferromagnetic surfaces of the environment, thus immobilizing the trolley, to a deactivated state of the magnetic suction cup, thus releasing the trolley from movement.

[0018] According to another embodiment, the cleaning device may comprise: - guide rails, and guide elements equipping the base chassis, guided by the guide rails, configured to allow the sliding of the entire base chassis and telescopic mast assembly along the direction of the rails, and in particular: - the guide rails oriented in a direction perpendicular to the direction of the telescopic mast, - each guide rail has a first guide surface along which said guide member is configured to slide or roll and a second guide surface, opposite the first guide surface, configured to cooperate with said guide member in order to prevent tipping of the base carriage.

[0019] According to one embodiment, the interface system may include a means for adjusting the height of said pivot joint relative to the base frame, and preferably in which the pivot joint along the first axis includes a joint support integral with the proximal segment pivotally articulated at its ends to two upright profiles and in which the means for adjusting the height of said pivot joint include the two upright profiles, as well as two upright sleeve profiles of the base frame, inside of which the two upright profiles are configured to be telescoped at several adjustable height levels.

[0020] According to one embodiment, the articulation support is a first articulation support fixed to the proximal segment, and free to slide along the proximal segment, the means for adjusting the inclination of the longitudinal axis of the telescopic mast relative to the base frame, comprising a second articulation support fixed to said proximal segment in a position offset on the length of the proximal segment, the second articulation support forming a second pivot joint along a second axis, parallel to the first axis, the second articulation support pivotally mounted with two second upright profiles, the second upright profiles having several adjustable positions of the second pivot joint according to the height of the second upright profiles.

[0021] According to one embodiment, the telescopic segments are tubular profiles inside which runs at least a portion of the length of the pipe, from an opening at the level of an opening of the proximal segment and to an opening of the distal segment at the level of which one or more external pipes of said telescopic mast supply the nozzle(s) of the nozzle rack.

[0022] According to one embodiment, the motorized mechanism configured to extend the telescopic mast from the retracted position, in which the telescopic segments are retracted, to the extended position uses a conduit that combines a conduit function for the cleaning fluid and a transmission function for the movement of the distal segment relative to the proximal segment to retract or extend the mast, said motorized mechanism comprising a motorization configured to push or, conversely, pull the flexible pipe in the proximal segment, and thus deploy or retract the telescopic mast, and in which preferably said motorized mechanism includes at least one rolling element, motor, in rolling contact with the at least partially flexible pipe, and a pressure roller maintaining the flexible pipe in contact with said rolling element.

[0023] In particular, the motorization may be a hydraulic motorization, the motorized mechanism comprising a reversing device having a three-position hydraulic valve: - a first neutral position, preventing fluid circulation in the engine, - a second position configured for rotating the engine in a first direction of rotation, causing the mast to deploy. - a third position configured for rotating the motor in a second direction of rotation, causing the mast to retract.

[0024] This disclosure relates, according to a second aspect, to a method for cleaning a surface to be cleaned extending along an inclined plane or along a horizontal plane, employing a cleaning device according to this disclosure, the method comprising a sequence including: / A / Position the base chassis close to the surface to be cleaned, with the longitudinal axis of the mast substantially parallel to the plane of the surface to be cleaned, particularly in the retracted position of the telescopic mast, / B / supply the cleaning fluid line and generate at least one spray stream through the nozzle(s) of the nozzle rack, directed towards the surface to be cleaned, and simultaneously, / C / deploy the telescopic mast so as to move the nozzle rack cantilevered from the base frame in the direction of extension of the telescopic mast so that said at least one spray stream sweeps the surface to be cleaned.

[0025] According to a first possibility, the gap between the nozzle rack and the elements of the surface to be cleaned is maintained during deployment in / C / , without contact with the surface to be cleaned, by regulating the fluid flow in / B / preferably controlled according to the deployment of the telescopic mast in / C / so that the quantity of movement generated by said spraying of the nozzles generates an action compensating the action of gravity on the nozzle rack and on the telescopic mast cantilevered from the base carriage.

[0026] According to one embodiment, the method comprises a first sequence including the implementation of steps / A / , / B / and / C / in which the telescopic mast extends along a horizontal component in the direction X and along a vertical component in the direction Z, and in which method a second cleaning sequence is implemented including a renewal of the steps / A / , / B / , and / C / after a movement of the assembly including the base trolley, the telescopic mast and the nozzle rack along a Y direction.

[0027] In particular, the first cleaning sequence by the cleaning device and the second cleaning sequence can be implemented on either side of an obstacle extending outward from the surface to be cleaned, and in which the movement of the base carriage assembly, telescopic mast and nozzle rack is carried out in the retracted position of the mast so that said assembly travels under the obstacle.

[0028] According to one embodiment of the process, the elements of the surface to be cleaned are finned radiators of heat exchangers. Brief description of the drawings

[0029] Other features, details and advantages will become apparent from reading the detailed description below and from analyzing the accompanying drawings, in which: Fig. 1

[0030] [Fig.l] is a view of a prior art cleaning device, which is hindered by a reinforcing element, such as a prop forming an obstacle protruding from a surface to be cleaned. Fig. 2

[0031] [Fig.2] illustrates two views of a cleaning device according to this disclosure comprising a base frame, and a telescopic mast extending cantilevered from the base frame, carrying a nozzle rack, illustrated on the left view in a retracted mast position, and illustrated on the right view in a deployed mast position. Fig. 3

[0032] [Fig.3] is a perspective view of the cleaning device according to the present disclosure. Fig. 4

[0033] [Fig.4] is a detailed view of the basic chassis and a mechanical interface system ensuring the maintenance of a proximal segment of the mast, which allows an adjustment of the inclination of the telescopic mast, but also an adjustment of the height of a proximal segment of the mast. Fig. 5

[0034] [Fig.5] is a cross-sectional view passing through an axis of the mast, at one end lower part of the mast intended to be connected to a flexible sleeve conduit, illustrating different telescopic segments consisting of a proximal segment, an intermediate segment, and a distal segment, but also an internal conduit in the mast supplying fluid to the nozzles, the conduit forming a transmission configured to transmit a force causing the deployment or retraction of the telescopic mast. Fig. 6

[0035] [Fig. 6] is a cross-sectional view passing through an axis of the mast, at the level of an upper end of the mast hydraulically connected to the nozzle rack via a fitting, a distributor, and lines external to the mast. Fig. 7

[0036] [Fig.7] is a detailed view of the nozzle holder rack, as well as a support system, comprising a set of pads, typically made of a plastic material, intended to rest on the surface to be cleaned, without damaging the surface in the event of undesired bending of the telescopic mast, under the action of gravity on the mast and nozzle holder rack assembly. Fig. 8

[0037] [Fig.8] is a side view of the nozzle holder rack. Fig. 9

[0038] [Fig.9] shows a diagram of a motorized mechanism configured to motorize the mast's deployment or retraction, using the fluid conduit as a push transmission to deploy the telescopic mast, or as a pull transmission to retract the telescopic mast, the motorized mechanism designed as a trolley module, independent of the base chassis, positioned at a distance from the base chassis by means of a flexible sleeve between the telescopic mast and the mechanism. Fig. 10

[0039] [Fig. 10] illustrates, according to a cross-sectional view passing through a vertical plane, a possible technical solution of the motorized mechanism which includes a motorized rolling element in contact with the flexible pipe, and a pressure roller, also called a counter-support roller. Fig. 11

[0040] [Fig. 11] illustrates a view of the motorized mechanism module, once the casing walls have been removed, illustrating a hydraulic motorization, as well as a device for reversing the direction of rotation of the motor comprising a hydraulic valve. Fig. 12

[0041] [Fig. 12] illustrates a version of the cleaning device in which the assembly comprising the base frame, the mast and the rack carried by the mast are guided by ground guide rails. Fig. 13

[0042] [Fig. 13] is a detailed view between the guide rail and a guide element of the base carriage cooperating with the rail in order to prevent the base carriage from tipping over. Description of the implementation methods

[0043] Reference is now made to [Fig.2] and following, which illustrate a cleaning device 1 suitable for cleaning elements extending along a surface to be cleaned SN, such as heat exchanger cooling elements.

[0044] Generally, the surface to be cleaned may be substantially horizontal, or extend along any plane of inclination.

[0045] Said cleaning device comprises: a) a basic chassis 2 intended to rest on a support surface, and in particular configured to be immobilized, b) a telescopic mast 3 comprising a plurality of telescopic segments 30, 31, 32 including a proximal segment 30 and a distal segment 32, and optionally one or more intermediate segments 31, the telescopic mast configured to move from a retracted position PR in which the telescopic segments are retracted into each other to a deployed position PD of the telescopic mast in which the segments are deployed relative to each other, c) a mechanical interface system 4 configured to maintain the proximal segment 30 to the base frame 2, and thus maintain the mast cantilevered from the base frame, d) a line CD for a cleaning fluid guided along the telescopic mast, e) a nozzle rack 5 comprising at least one spray nozzle, said nozzle rack 5 fixed to the distal segment 32 of the telescopic mast cantilevered from the base frame 2 at least in the deployed position PD of the telescopic mast 5, the nozzle(s) 50 hydraulically connected to the line CD, generating at least one spray flow FP1, FP2 in a transverse direction relative to the axial direction of the mast, f) a motorized mechanism 6 configured to move the mast from the position between the retracted position PR and the deployed position PD, in the direction of deployment and in the direction of retraction of the mast.

[0046] Said cleaning device 1 is configured to ensure the cleaning of the elements along the surface to be cleaned, by supplying the line CD with a cleaning fluid, under pressure, so as to generate a spray of a flow of cleaning fluid FP1, FP2, following the transverse direction of said telescopic mast 3, and by activating the motorized mechanism 6 to deploy or retract the telescopic mast cantilevered from the base frame in order to ensure the movement of the nozzle-carrying rack generating the spray flow along the surface to be cleaned.

[0047] The basic chassis 2 can typically comprise profiles assembled together to form the chassis, typically by welding, or by means of fastening elements.

[0048] According to one embodiment, the basic chassis 2 comprises four uprights M1, M2, M3, M4, in particular arranged at the four corners of the chassis, and cross members T1, T2, T3, T4, T5, T6, T7, T8, connecting the four uprights two by two.

[0049] The basic chassis 2 may include two uprights, consisting of a first upright M1, and a second upright M2, on a first side of the chassis at the level of two adjacent corners of the chassis, and two other uprights, M3, M4, consisting of a third upright M3 and a fourth upright M4, on a second side, of greater dimension in length than the first and second uprights M1,M2.

[0050] A first lower cross member T1 and a second lower cross member T2 can extend substantially horizontally, in parallel: - the first cross member Tl connecting the first upright Ml and one end and the third upright M3, in particular at the lower ends of the uprights Ml, M3, in particular via pairs of angles, notably between upright and cross member profiles, - the second cross member T2 connecting the second upright M2 and the fourth upright M4, in particular at the lower ends of the uprights M2, M4 in particular via pairs of angles in particular between profiles of uprights and cross member.

[0051] A third horizontal, lower cross member T3 can connect the first upright M1 and the second upright M2, and a fourth horizontal, lower cross member T4 can connect the third upright M3 and the fourth upright M4, at the lower ends of the uprights M3, M4.

[0052] A fifth horizontal cross member T5 can connect the third upright M3 and the fourth upright M4 in the median positions of the uprights M3, M4.

[0053] A sixth horizontal cross member T6 can further connect the first upright M1 and the second upright M2, at the lower ends of the uprights M1, M2.

[0054] The basic chassis 2 may include a cross member, in particular a seven-piece cross member T7 which connects the first upright M1 and the third upright M3, from an upper end of the first upright M1, (in particular via pairs of angles between an upright profile and a cross member profile) to the level of the upper end of the third upright, the cross member T7 extending upwards, diagonally from the first upright M1 to the third upright M3.

[0055] The basic chassis 2 may include a cross member, in particular an eighth cross member T8 which connects the second upright M2 and the fourth upright M4, from an upper end of the second upright M2, (in particular via angle pairs between an upright profile and a cross member profile) to the level of the upper end of the fourth upright, the cross member T8 extending upwards, diagonally from the second upright M2 to the fourth upright M4.

[0056] The profiles of the uprights Ml to M4 and cross members Tl to T8 can be hollow profiles with a rectangular cross-section.

[0057] The basic chassis 2 is not limited to the construction described above.

[0058] Generally, the base chassis 2 can use thin profiles for its construction, typically less than 3mm, or even less than 2mm, so as to limit the mass of the base chassis 2 possibly with the mechanical interface system 4 which is preferably less than 40 kg, for example less than 30 kg, for example 25 kg.

[0059] The length of the telescopic mast 3, in the deployed position PD, can typically be between 1 m and 15 m, particularly between 6 m and 15 m. In the deployed position of the telescopic mast, the center of gravity of the entire device, including the base frame, the mast, and the rack, may be such that the base frame is inherently unstable, especially if the rack is not resting on the surface to be cleaned, thus requiring anchoring to the ground to prevent it from tipping over. Various technical solutions can be considered for anchoring the cleaning device to the ground.

[0060] This may, in particular, be an anchoring system, which requires the operator to positively anchor the base chassis to a fixed support prior to deploying the mast, after each movement of the base chassis, as illustrated in Figures 3 and 4. The cleaning device is moved on the ground in the retracted position of the stable mast, as explained below. Alternatively, it may be an anchoring of the base chassis to rails with an anti-tipping function for the base chassis, as illustrated in Figures 12 and 13, which ensures anti-tipping even when the trolley is moved along the rails. According to such an embodiment, the base chassis 2 may be manually, and preferably anchored, or motorized to ensure its automatic movement along the rails.

[0061] The length of the telescopic mast 3 in the retracted position PR can typically be between 1 m and 2 m. In the retracted position PR of the telescopic mast, the center of gravity of the entire device including the base frame, the mast and the rack can be such that the base frame is stable, and in particular even when the latter is simply supported on the ground for example, possibly by means of casters 21, as illustrated by way of example in [Fig.3].

[0062] The segments 30, 31, 32 of the telescopic mast can be profiles, for example with a non-circular cross-section, for example rectangular. The segments can thus slide and telescope into one another, without allowing relative rotation between two consecutive segments, around an axis of the mast 3. The profiles of the different segments 30, 31, 32 can slide directly by sliding their surfaces against each other, or alternatively via bearings, between successive profiles. or even via ball bearings. The use of bearings or ball bearings reduces, or even eliminates as much as possible, friction between segments during the extension or retraction of the mast. The cross-sections of the profiles of segments 30, 31, and 32 can decrease from the proximal segment 30 to the distal segment, allowing the profiles to telescope. In one embodiment, notably illustrated, there are three segments 30, 31, and 32, including the proximal segment 30, the distal segment 32, and an intermediate segment 21.

[0063] The profiles of the telescopic mast may have a wall thickness of less than 3 mm, preferably less than 2 mm, in order to limit the mass of the telescopic mast. The mass of the telescopic mast may typically be less than 40 kg, preferably less than 30 kg. The entire telescopic mast assembly (3) and nozzle rack may have a mass of less than 40 kg, preferably less than 30 kg, such as 25 kg.

[0064] Limiting the mass of the telescopic mast and more generally of the nozzle rack assembly 5 can advantageously allow the cleaning device to be assembled on the cleaning site, from modules in the disassembled state comprising the base chassis 2 as a first module; and the telescopic mast and nozzle rack assembly, as a second module, the first module consisting of the base chassis 2 and the telescopic mast and nozzle rack assembly as a second module for each to be carried by manpower, without requiring lifting means such as a crane or hoist.

[0065] Due to such limited wall thickness, the various segments 30, 31, 32, and more generally the mast, exhibit limited rigidity, the mast being susceptible to substantial deflection under the action of gravity on the mast and the nozzle rack, which is preferably arranged at the top of the mast. By way of example, the mast may deflect by more than 1 meter in the deployed position, or even be structurally incapable of supporting the load without compensation from the momentum generated by the water spray, or without additional support obtained from the support system described below.

[0066] It is still understandable that the amplitude of the deflection is maximum in the deployed position PD of the mast, due to the greater overhang.

[0067] In general, the telescopic mast 3 can extend along an axial direction of the mast at least along a horizontal component X, or possibly along a vertical component Z cantilevered from the base frame 2 from the proximal segment 30 to the distal segment 32, and therefore capable of bending under the action of gravity on the nozzle rack 5 and the mast 3.

[0068] Given the possible deflection of the mast, there is a risk that the gap between the nozzle rack and the elements of the surface to be cleaned SN may decrease until it reaches unwanted contact between the nozzle holder rack and the elements of the surface to be cleaned SN.

[0069] The nozzle(s) 50 can be oriented downwards configured so that the quantity of movement generated by the water sprayed by the nozzle(s) exerts an action opposing the action of gravity on the nozzle rack.

[0070] Advantageously, during cleaning, at least according to a first cleaning strategy, a gap can be maintained between the nozzle rack and the elements of the surface to be cleaned, advantageously without contact with the surface to be cleaned, particularly during the deployment of the mast, by regulating the fluid flow in / B / so that the momentum generated by said spraying of the nozzles generates an action compensating the action of gravity on the nozzle rack and on the telescopic mast cantilevered from the base carriage 2. The flow regulation can typically be controlled according to the deployment stroke of the mast.

[0071] The downward orientation of the nozzles generates a force opposing gravity through the momentum of the sprayed water. This maintains a gap between the nozzle holder and the surface to be cleaned, thus preventing any unwanted contact that could damage the surface. This configuration is particularly useful for delicate surfaces, such as cooling fins, ensuring effective cleaning without risk of damage. Another advantage of this contactless cleaning strategy is that it becomes possible to clean, regardless of any irregularities in the surface, since the nozzle holder is kept away from the surface without requiring any sliding or rolling contact.

[0072] Such control can be implemented manually by the operator controlling a means for adjusting the fluid flow rate.

[0073] Generally, the fluid, typically water, supplying the line CD can be pressurized by a motor-pump unit, which can be external to the cleaning device itself, which includes control electronics comprising a frequency inverter controlling a motor of the motor-pump unit, and which allows the rotation frequency of the pump to be varied, and thus to increase or decrease the flow of fluid supplying the nozzle rack 5. A user interface can allow the rotation speed of the pump to be controlled.

[0074] Such control can also be implemented automatically. For example, the device may include a means for regulating the flow rate of pressurized fluid conveyed by said fluid line to the nozzle rack, typically by controlling the pump's rotational speed, and means for linking the flow rate control means with a telescopic mast extension stroke. This may involve A preference is made for a control system configured to increase the flow rate when the telescopic mast is extended. The control system can be an open-loop control system.

[0075] According to another embodiment, a control unit comprising a processor and a memory containing an instruction set can be configured to provide closed-loop control by using a distance sensor attached to the mast or the nozzle rack 5, configured to measure the distance between the nozzle rack 5 and the surface to be cleaned Sn, in a direction substantially perpendicular to the mast.

[0076] The signal from the distance sensor is an input to the control unit. The processor cooperates with the memory to implement the instructions that ensure regulation with a setpoint relating to a nominal distance.

[0077] The setpoint can optionally be adjusted, via a user interface, or by learning and recording a distance value measured by the sensor, at the beginning of mast deployment.

[0078] According to one embodiment, the nozzle rack 5 may include a support system 7, comprising one or more pads 70, 71, extending substantially along a plane parallel to the axial axis of the mast, below the nozzle(s) 50. The pad(s) 70, 71 are configured to bear against the surface to be cleaned SN in the event that the action generated by said momentum generated by the action of the sprayed water is insufficient to oppose the bending of the telescopic mast 3 to maintain a gap without contact with the surface to be cleaned, or the pad(s) 70, 71 configured to slide on the surface to be cleaned during the deployment or retraction of the mast.

[0079] The skate(s) 70, 71 can optionally be replaced by one or more rolling elements, comprising one or more rollers made of soft materials and configured to roll on the surface to be cleaned.

[0080] The support system 7 is illustrated in detail, at least according to one variant, in figures 7 and 8.

[0081] Generally, the nozzle rack 5 may include a support 51, in the form of an open profile extending lengthwise parallel to the mast 3, and fixed to the distal segment 32 of the mast, below the latter. A first set of nozzles 52 may be fixed to the support at a first distal end of the support. This first set of nozzles 52 comprises a fluid-tight hollow bar extending transversely to the support, in a direction perpendicular to the mast, on either side of the support, and preferably a plurality of nozzles 50 distributed along the length of the hollow bar, typically regularly along its length. This hollow bar is supplied with fluid via at least one external conduit, and for example, by two conduits. external CE, in parallel supplying the hollow bar on both sides of the support 51 from the fluid of the line CD, which can typically be internal to the mast, as illustrated in the figures.

[0082] The first set of nozzles 52 can generate a (first) spray stream FP1 through the jets of the various nozzles 50. The various jets of the nozzles can create a fluid curtain, which extends substantially transversely to the mast, as illustrated in [Fig. 7]. The length of the fluid curtain along the longitudinal direction of the hollow bar of the first set of nozzles 52 can typically be less than 2 meters, typically between 1 m and 1.5 m in length.

[0083] A second set of nozzles 53 can be fixed to the support 51, at a second distal end of the support 51, the first set of nozzles 52 comprising a (second) fluid-tight hollow bar extending transversely to the support, in a direction perpendicular to the mast, on either side of the support, and preferably a plurality of nozzles 50 distributed along the length of the hollow bar, typically regularly along the length of the hollow bar. This hollow bar is supplied with fluid via at least one external line CE, and for example by two external lines CE in parallel supplying the hollow bar from both sides of the support from the fluid in the line CD, typically internal to the mast.

[0084] The second set of nozzles 53 can generate a (second) spray stream FP2 through the jets of the various nozzles 50. The individual jets from the nozzles can create a fluid curtain, which extends substantially transversely to the mast, as illustrated in [Fig. 7]. The length of the fluid curtain along the longitudinal direction of the hollow bar of the first set can be less than 2 meters, typically between 1 m and 1.5 m, and is typically the same length as the fluid curtain of the first spray stream.

[0085] The support system 7 is preferably arranged, along the lengthwise direction of the mast, in an intermediate position between the first set of nozzles 52 and the second set of nozzles 53, the support support 7 fixed to the support 51 in an intermediate position, for example in its middle.

[0086] The support bracket 7 may include a set of pads 70, 71, and for example one or more pads 70, extending lengthwise transversely to the axis of the mast, and one or more pads extending longitudinally to the mast. According to an illustrated embodiment, the support bracket includes a set of four pads, which are assembled in pairs by their longitudinal ends, including two pads 70 extending parallel to each other, transversely to the mast and two pads 71 ​​extending parallel to each other, along the direction of the mast.

[0087] The four pads 70, 74 thus assembled two by two form a support surface of the rectangular support support, or in the form of a frame.

[0088] In the event that the bending of the mast is not compensated by the thrust of the nozzle jets, the nozzle rack can rest on the elements of the surface to be cleaned only by means of the pads 70, 71 (or the bearing elements), without damaging the elements of the surface to be cleaned which may be fragile, such as cooler fins.

[0089] The material of the pads is chosen to avoid any marking of the surface to be cleaned; the pads can typically be made of a plastic material, or include an elastomer such as rubber, or even an alveolar plastic foam.

[0090] Similarly, the rolling element(s) (as a replacement for the pads) may include a tread made of flexible material, for example plastic or elastomer.

[0091] According to one embodiment, the support support including the pads or the rolling element(s) can enable the implementation of a second cleaning strategy where the rack-doors 5 slides along the direction of the mast via the pads, or rolls via the rolling element(s) during spray cleaning, during the motorized deployment of the telescopic mast.

[0092] This second cleaning strategy can in particular be implemented when the surface to be cleaned Sn has a surface condition, along the direction of the mast, allowing the slide of the pad (or the rolling of the rolling element(s)), without any obstacle likely to catch and oppose the slide / roll.

[0093] The mechanical interface system 4 is configured to maintain the proximal segment 30 to the base frame 2, and thus the mast cantilevered from the base frame.

[0094] According to one embodiment, the mechanical interface system 4 may include means for adjusting the inclination of the longitudinal axis of the telescopic mast 3 relative to the base frame 2. The means for adjusting the inclination may typically include at least one pivot joint LP allowing articulation of the telescopic mast relative to the base frame 2, along a first axis Al, orthogonal to the mast.

[0095] The A1 axis is typically oriented along the direction of the Y-axis, as shown in [Fig. 4] when the mast extends lengthwise along at least one component in the X direction, or even along a vertical component in the Z direction. The angular adjustment range of the mast around the A1 axis can be at least 45°, or even more, and is typically less than 90° around the A1 axis.

[0096] According to at least one first setting configuration of the setting means, the mast can be oriented so that its axis extends horizontally, namely along the X direction in [Fig.4].

[0097] According to at least one second adjustment configuration of the adjustment means, the mast can be oriented around the axis Al at an angle α with respect to the direction horizontal, angle which is greater than or equal to 45° or preferably greater than or equal to 60° or preferably greater than or equal to 70°. The first and / or second configuration may be in whole or in part the extreme adjustment positions.

[0098] Generally, the inclination of the mast is adjusted according to an angle equal to the inclination of the surface to be cleaned SN, or at least close to plus or minus 5°.

[0099] The tilt adjustment means allow the angle of the telescopic mast to be adjusted so that it is preferably parallel to the surface to be cleaned. This optimizes cleaning efficiency by ensuring uniform coverage and maximizing the impact of the cleaning fluid on the surface.

[0100] The pivot joint allowing the mast to be articulated relative to the base frame offers great flexibility in the mast's positioning. This articulation makes it possible to adapt the device to different surface configurations, whether horizontal, inclined, or even close to vertical, thus increasing the device's versatility.

[0101] By allowing precise tilt adjustment, the device can be used in a variety of environments without requiring significant structural modifications. This reduces preparation time and costs associated with adapting the device to different surfaces, thereby improving operational efficiency.

[0102] In general, the mechanical interface system 4 may further include a means for adjusting the height of said pivot link LP relative to the base frame. Adjusting the height of the pivot link allows the vertical position of the telescopic mast relative to the base frame to be adjusted. This adjustability ensures that the mast can be positioned at the optimal height for cleaning surfaces located at different levels, thus increasing the versatility of the device.

[0103] In general, the means for adjusting the inclination and height of the mast can, in the retracted position PR of the mast 3, allow the overall height of the assembly (comprising the base frame, the mechanical interface system 4, the telescopic mast 3 and the nozzle rack 6) to be further reduced. Reducing the overall height of the assembly can be advantageous for moving the assembly under an obstacle OBT.

[0104] These means of adjusting the inclination and height can also make it possible to reduce the overall size for storage or transport in a vehicle or trailer.

[0105] According to one embodiment, illustrated by way of non-limiting example in [Fig. 4], the pivot joint LP along the first axis A1 may comprise a joint support 40 integral with the proximal segment 30, which is pivotally articulated at its ends to two upright profiles 41, 42. The means for adjusting the height of said pivot joint LP These include the two upright profiles 41 and 42, as well as the two sleeve profiles 43 and 44 for the uprights M3 and M4 of the base frame 2. Inside, the two upright profiles 41 and 42 are configured to be telescoped at several height adjustment levels. The sleeve profiles 43 and 44 can be the third upright M3 and fourth upright M4 previously described.

[0106] The sleeve profiles 43, 44 may have several adjustment holes OR depending on their height, allowing different locking positions for a fastener, such as a pin. During adjustment, the profile 41 (respectively 42) is telescoped into the sleeve profile 43 (respectively 44) until an adjustment hole of the profile 41 (respectively 42) is aligned with one of the adjustment holes of the sleeve profile 43 (respectively 44), and then the position is locked by inserting the fastener OF through the corresponding holes. The locking element can typically be the pin, or a screw / nut system.

[0107] It is further noted that the two profiles 41, 42 can be linked and rigidly joined together by a connecting plate LI. Opposite walls of the two sleeve profiles 43, 44 have vertically oriented slots through which the connecting plate LI passes, and along which the connecting plate LI can move during adjustment of the upright profiles 41, 42 in the sleeve profiles 43, 44.

[0108] The joint support can be a first joint support 40 fixed in rotation to the proximal segment 30. The joint support 40 can however be free to slide along the proximal segment 30.

[0109] The means for adjusting the inclination of the longitudinal axis of the telescopic mast relative to the base frame 2 may further include a second articulation support 45 integral with said proximal segment 30 in a position offset along the length of the proximal segment 30, and relative to the first support 40. The second articulation support 45 may in particular be positioned close to one end of the proximal segment forming the proximal end of the mast.

[0110] The second articulation support 45 forms a second pivot joint LP2 along a second axis A2, parallel to the first axis Al, the second articulation support 45 pivotally mounted with two second upright profiles 46, 47. The second upright profiles can have several adjustment positions of the second pivot joint depending on the height of the second upright profiles 46, 47.

[0111] The second upright profiles 46, 47 can themselves be in adjustable positions within sleeve profiles 48, 49, and can be telescoped vertically into different positions within the sleeve profiles. For this purpose, it is noted that the profiles 46, 47 have several adjustment holes OR which can be set in correspondence with orifices of the sleeve profiles, in order to be passed through by a fixing element, such as a pin or a screw / nut assembly.

[0112] The sleeve profiles 48, 49 receiving the height-adjustable upright profiles 46, 47 can be attached respectively to parallel crossbeams, in particular to the eighth crossbeam T8 and the ninth crossbeam T9, inclined diagonally, connecting respectively the uprights M1, M2 to the uprights M3, M4 of greater height dimension, and in particular in median positions of the crossbeams T8, T9.

[0113] Generally, it is possible to adjust the inclination of the mast by adjusting a difference in level between the first axis Al and the second axis A2.

[0114] For example, an inclination of the mast along the X direction, substantially horizontal, can be obtained by setting the first axis Al and the second axis A2 to the same height level along the Z direction. It may be possible to set the first axis Al and the second axis A2 to the same height level, and at different adjustment heights, to allow not only adjustment of the inclination of the mast, but also adjustment of the gap between the mast and the surface to be cleaned SN.

[0115] It is still possible to adjust the mast's inclination by raising the height level of the first axis A1 relative to the second axis A2, often by tilting the mast, which comprises a component along the X direction and a component along the horizontal Z direction. The mast is typically inclined upwards from the proximal segment to the distal segment in the deployed position PD.

[0116] For all or part of the tilt adjustments, it is still possible to adjust the gap between the mast and the surface to be cleaned, by telescoping the profiles 41, 42, 46, 47 in their respective sleeve profiles 43, 44, 48, 49, in different height positions.

[0117] The mechanical interface system 4 allowing adjustment of the inclination and / or height of the mast thus makes it possible to adapt the cleaning device to different configurations of the surface to be cleaned, and according to different inclinations of the surfaces to be cleaned.

[0118] According to one embodiment, the basic chassis 2 may be a trolley comprising casters 21 configured to allow the device to move along a horizontal surface. All or part of the casters 21 may include a yoke, pivotally mounted relative to the chassis, about a vertical axis to allow changes in the direction of the trolley. Alternatively, the casters 21 may be replaced by omnidirectional wheels.

[0119] Anchoring means 8 can be configured to immobilize the base frame 2, and / or the proximal segment 30, to at least one surface of the environment. The base frame is immobilized after its movement and before deploying the telescopic mast, in order to prevent the risk of tipping. The basic trolley assembly 2, telescopic mast and nozzle rack. The anchoring means 8 may include one or more magnetic suction cups 80 configured to go from an activated state configured to anchor to one or more ferromagnetic walls of the environment, immobilizing the trolley, to an inactivated state of the magnetic suction cup, releasing the movement of the trolley.

[0120] The cleaning device may thus include a magnetic suction cup 80 attached to the base chassis 2 at a lower portion of the chassis. This magnetic suction cup can be moved from a high position, above the level of the casters 21, to a low position (not shown) in which an active surface of the magnetic suction cup 80 comes into contact with the floor on which the casters 2L move. Once the magnetic suction cup is in the low position, a lever Lv of the suction cup activates the magnetic suction cup, typically by moving a permanent magnet internal to a body of the suction cup, near the active surface of the suction cup, which then presses itself locked against the ferromagnetic floor under the attractive force of the permanent magnet.The magnetic suction cup is deactivated by moving lever Lv in the opposite direction, which causes the permanent magnet to move away from the active surface to a position that eliminates the magnetic attraction between the magnet and the ferromagnetic ground.

[0121] The cleaning device may include, in particular in addition to the first magnetic suction cup, a magnetic suction cup 80 attached to the proximal segment and tiltable with the proximal segment 30. The active surface of the suction cup 80 is preferably parallel to the axis of the mast, which allows an active surface of the suction cup to be pressed against an inclined wall of the surface to be cleaned, ferromagnetic, when the mast is inclined parallel to the surface to be cleaned.

[0122] Once the active surface of the suction cup is against the inclined wall, a lever Lv of the suction cup activates the magnetic suction cup by moving a permanent magnet internal to the suction cup body near the active surface, which then presses against the inclined ferromagnetic wall. The magnetic suction cup is deactivated by moving the lever Lv in the opposite direction, causing the permanent magnet to move away from the active surface until it reaches a position that eliminates the magnetic attraction between the magnet and the inclined ferromagnetic wall.

[0123] The magnetic suction cups allow for quick and secure attachment of the device to ferromagnetic surfaces, ensuring optimal stability during cleaning. This attachment prevents any unwanted movement, guaranteeing precise and uniform cleaning.

[0124] The ability of the suction cups to easily switch between the activated and deactivated states offers great operational flexibility. Operators can quickly anchor the device to stabilize it, then unanchor it to move it, thus reducing the time needed to reposition the device and increasing the efficiency of the cleaning process.

[0125] By reliably immobilizing the base frame, the suction cups minimize the risk of tipping or accidental movement, even when the telescopic mast is fully extended. This maintains a constant distance between the nozzles and the surface, ensuring uniform application of the cleaning fluid.

[0126] The magnetic suction cups also allow the device to be anchored to vertical or inclined surfaces, thus increasing its versatility. This capability is particularly useful in industrial environments where the surfaces to be cleaned may vary in orientation and inclination.

[0127] According to one embodiment illustrated in particular by way of non-limiting example, the cleaning device may include guide rails Ra and guide members 22 equipping the base frame, guided by the guide rails Ra configured to allow the sliding of the base frame assembly 3 and telescopic mast along the direction of the rails.

[0128] In particular, the guide rails Ra can be oriented in a direction perpendicular to the direction of the telescopic mast 3.

[0129] According to one embodiment, particularly illustrated in [Fig. 13], each guide rail comprises a first guide surface SGI along which said guide member 22 is configured to slide or roll and a second guide surface SG2, opposite the first guide surface SGI, configured to cooperate with said guide member 22 in order to prevent the base carriage from tilting. The guide rail Ra may be a tubular profile, with a substantially rectangular cross-section, and has a longitudinal slot on an upper wall of the profile. The guide member comprises a plate passing through the slot, substantially vertical, and at least one rolling member 22, articulated on the plate, in particular two rolling members 22 on either side of the plate.

[0130] Each bearing element 22 is configured to cooperate with the first guide surface SGI, below, and intended to cooperate with the second guide surface SG2, above.

[0131] According to one embodiment, the telescopic segments 30, 31, 32 are tubular profiles inside which runs at least a portion of the length of the conduit CD, from an opening of the proximal segment 30 to an opening of the distal segment 32, at the level of which the external conduit(s) CE of said telescopic mast feeds the nozzle(s) 50 of the nozzle rack 5.

[0132] Thus, according to this preferred embodiment, the portion of the conduit CD running along the mast is advantageously internal to the various segments 30 to 32, and thus protected. The conduit CD can typically be flexible, made of plastic.

[0133] The distal end of the CD pipe is integral with distal segment 32, and fluidically connected in a leak-proof manner to a fitting RC, at the level of an opening of the distal segment 32. The fitting RC may be followed by a distributor DIST whose body includes several openings fluidically connected respectively to the different external pipes, which may also be flexible, typically made of plastics.

[0134] According to one embodiment, not illustrated, the motorized mechanism configured to telescope the mast from the retracted position PR to said deployed position may include an actuator, such as a motor, and a set of transmissions, linking the segments two by two.

[0135] For example, said transmission assembly may include: - a first flexible traction link connecting the proximal segment 30 to the intermediate segment 31, configured to retract the intermediate segment into the proximal segment when actuated by the motor, - a second flexible traction link connecting the proximal segment 30 to the intermediate segment 31, configured to deploy the intermediate segment into the proximal segment when actuated by the motor, - a third flexible link connecting the proximal segment 30 and the distal segment 32, and cooperating with a first pulley of the intermediate segment 31 to retract the distal segment into the intermediate segment, under the action of the retraction of the intermediate segment 31 relative to the proximal segment 30, - a fourth flexible link connecting the proximal segment 30 and the distal segment 32, and cooperating with a second pulley of the intermediate segment 31 to deploy the distal segment 32 relative to the intermediate segment 31, under the action of the deployment of the intermediate segment 31 relative to the proximal segment 30.

[0136] According to such an embodiment, the transmission which includes the flexible links (first, second, third and fourth) is specific to the motorized mechanism configured to retract or on the contrary deploy the mast.

[0137] According to another advantageous embodiment (illustrated in particular in Figures 9 to 11), the motorized mechanism 6 uses the conduit CD which combines a conduit function for the cleaning fluid and a transmission function for the movement of the distal segment 32 relative to the proximal segment 30 to retract the mast or, on the contrary, to deploy it.

[0138] The motorized mechanism 6 includes a motorization M configured to push or, conversely, pull the flexible conduit in the proximal segment, and thus deploy or retract the telescopic mast 3.

[0139] When the motor M pushes the conduit CD into the proximal segment, the conduit slides inside the proximal segment 30, or even inside the intermediate segment 31, and in turn pushes the distal segment 32, causing the mast to deploy.

[0140] On the contrary, and when the motorization pulls the CD conduit, the conduit slides inside the proximal segment in the opposite direction, see in the intermediate segment, the conduit pulls on the distal segment 32, which causes the retraction of the mat 3.

[0141] The motorization M may include at least one drive roller, 60 in rolling contact with the at least partially flexible line, and a pressure roller 61, also called a counter-support roller, keeping the flexible line CD in contact with said rolling member.

[0142] According to one embodiment, only the drive roller 60, driven in rotation by the motor, is driven, said pressure roller 61 being able to be passive, i.e. non-driven.

[0143] According to one variant, the drive roller 60 and the pressure roller 61 can be in contact by their respective treads, as taught by application FR 3.104.040, so that the pressure roller is also active, driven.

[0144] In general, the motorized mechanism 6 can be designed as a module, independent of the basic chassis 2.

[0145] The motorized mechanism module 6 typically includes a chassis supporting the motorization M and the rollers 60,61, and which is arranged at a distance from the base chassis 2, a portion of the flexible conduit CD thus extending between the motorized mechanism module and an opening of the proximal segment 30.

[0146] A sheath conduit CF connects a fitting of the motorized mechanism 1 to a fitting attached to the proximal segment 30, at the level of the mouth, and ensures the guidance of the flexible conduit CD between the motorized mechanism 6 and the proximal segment 30 of the mast, ensuring that the traction forces on the conduit CD are properly transmitted to deploy or retract the mast, the module keeping a fixed relative position with respect to the proximal segment 30 of the mast.

[0147] The CF sheath conduit and the CE flexible conduit are flexible in order in particular to allow different positions of the motorized mechanism module 6 relative to the base carriage, within the limits permitted by the length of the CF sheath conduit.

[0148] The module chassis may include casters, for its movement on the ground, independently of the base trolley 2.

[0149] According to one embodiment, the motorization M can be a hydraulic motorization, the motorized mechanism 6 comprising a reversing device typically having a hydraulic valve 62 with three positions: - a first neutral position, prohibiting the circulation of fluid in the motor, - a second position configured for rotating the motor in a first direction of rotation, causing the mast to deploy, - a third position configured for rotating the motor in a second direction of rotation, causing the mast to retract.

[0150] It is noted that the valve 62 can be controlled by a control element and in particular by a control lever Le, to cause the valve to pass into one of the three positions.

[0151] It is also noted that the valve 62 can be raised in height relative to the assembly comprising the motorization M and the rollers 60,61, in order to allow the user to operate the control lever, without having to bend over.

[0152] Using a hydraulic drive is advantageous because it eliminates the need for electrical equipment that requires watertight protection against water splashes. However, in one possible variant, the drive M can be an electric motor. Industrial application

[0153] The present disclosure is further related to a method of cleaning a surface to be cleaned SN extending along an inclined plane or along a horizontal plane implementing a cleaning device according to this disclosure.

[0154] The process may have a sequence comprising: / A / Position the base frame 2 close to the surface to be cleaned, the mast with longitudinal axis preferably substantially parallel to the plane of the surface to be cleaned, and preferably anchor the base frame to a wall, the mast preferably in its retracted position PR, / B / supply the cleaning fluid line and generate at least one spray stream through the nozzle(s) of the nozzle rack, directed towards the surface to be cleaned, and simultaneously, / C / deploy the telescopic mast so as to move the nozzle rack cantilevered from the base frame in the direction of extension of the telescopic mast so that said at least one spray stream sweeps the surface to be cleaned.

[0155] Step / A / may include adjusting the inclination of the mast, following an inclination equal to or close to, for example, plus or minus 5° of the inclination of the surface to be cleaned SN.

[0156] Step / A / may include setting a nominal gap between the nozzle holder rack and the surface to be cleaned, at least in the retracted position PR of the telescopic mast.

[0157] The tilt adjustment or the gap adjustment can be operated by the adjustment means of the mechanical interface system 4.

[0158] According to one embodiment of the method, in particular when the mast is subject to bending, a gap is maintained between the nozzle rack and the elements of the surface to be cleaned during the deployment of the mast in / C / by regulating the fluid flow in / B / preferably controlled according to the deployment of the telescopic mast in / C / so that the quantity of movement generated by said spraying of the nozzles generates an action compensating the action of gravity on the nozzle rack and on the telescopic mast cantilevered from the base carriage 2.

[0159] Such a cleaning embodiment is advantageously carried out without contact by sliding or rolling with the elements of the surface to be cleaned, allowing cleaning of the surface, even those with strong irregularities.

[0160] Where the condition of the surface to be cleaned permits, it may be possible, in / C / , to slide on the surface to be cleaned by means of the pads of the support, or to roll on the surface to be cleaned by means of the rolling element(s). Such an embodiment eliminates the need for flow regulation.

[0161] With reference to [Fig. 2], the nozzle rack 5 carried by the mast is moved during deployment along a velocity vector comprising a component along the horizontal X direction and a component along the vertical Z direction. Surface cleaning is achieved along the slope direction contained in the XZ plane, but only over a portion of the surface along the Y direction.

[0162] To obtain the cleaning of the surface to be cleaned along the Y direction, perpendicular to the slope, the base carriage (and thus the mast and the nozzle rack it carries) is moved, typically step by step, in order to repeat the steps / A / , / B / , / C / .

[0163] Also, and at least according to one embodiment, said method comprises a first sequence including the implementation of steps / A / , / B / and / C / for which the telescopic mast extends along a horizontal component in the direction X and along a vertical component in the direction Z, and in which the method, a second cleaning sequence is implemented including a renewal of steps / A / , / B / , and / C / after a movement of the base chassis (and more generally of the base trolley assembly, telescopic mast and nozzle rack) along a direction Y, in particular in the retracted position PR of the telescopic mast.

[0164] According to one non-limiting embodiment, the elements of the surface to be cleaned may be finned radiators of heat exchangers.

[0165] In the case where an obstacle OBT, such as a prop, represented in [Fig.1], commonly called a "brace", extends upwards from the surface to be cleaned SN protruding from the surface to be cleaned, it is noted that the latter can prevent the movement of the cleaning device, and in particular of the basic trolley assembly and the telescopic mast in the deployed position PD of the mast, and as represented on the right in [Fig.2].

[0166] On the other hand, the height of the base carriage and telescopic mast assembly, in the retracted position PR of the mast, allows said assembly to be moved below the obstacle OBT, to allow the cleaning device to treat, by means of the spray flow, the surface to be cleaned, to the right and left of the obstacle, viewed along the Y direction.

[0167] Thus, and at least according to one embodiment, the first cleaning sequence by the cleaning device 1 and the second cleaning sequence are implemented on either side of an obstacle OBT extending in projection from the surface to be cleaned, and in which the movement of the assembly of base trolley 2, telescopic mast 3 and nozzle holder rack 5 is carried out in the retracted position PR of the mast so that said assembly travels under the obstacle OBT.

[0168] According to another variant, in particular when the base carriage 2 is guided by the rails Ra preventing the base carriage from tipping, it is possible to move the entire base carriage, telescopic mast and nozzle rack 5 into the deployed position of the mast PD, which allows the surface to be swept by the spray flow along the Y direction by alternating cleaning sequences for which the nozzle rack 5 and the spray flow FP1, FP2 sweep the surface to be cleaned, alternately a sweeping direction of the spray flow FP1, FP2 upwards and a sweeping direction of the spray flow downwards between two successive sequences.

[0169] The cleaning device can advantageously be transported, in a disassembled state, in several sub-assemblies, typically of controlled mass, for example less than or equal to 40 kg, preferably less than or equal to 30 kg, each of which can be carried by manpower, and in particular: - a first sub-assembly (or first module) comprising the basic chassis 2 and typically the mechanical interface system 4, - a second sub-assembly comprising the telescopic mast and typically the nozzle holder rack 5, - a third sub-assembly comprising the motorization mechanism 7, - and typically a fourth sub-assembly comprising the motor-pump unit.

[0170] The various sub-assemblies, each with a controlled mass, can be transported in a disassembled state to the vicinity of the surface to be cleaned Sn, by manpower, without requiring lifting means such as a crane, and then assembled on site.

[0171] The cleaning device 1 finds a particular application for cleaning finned surfaces of heat exchangers, in particular of power generation plants.

[0172] The scope of application of the cleaning device 1 is not, however, limited to this area. Such a device can be used for cleaning any sloping surface, in particular flat surfaces and, for example, roof surfaces or solar panel surfaces.

[0173] In general, the technical solutions in this disclosure may enable the achievement of some or all of the following benefits: - Flexibility and Adaptability: The telescopic mast, with its deployable segments, allows access to different areas and preferably adapts to various surface orientations, thus increasing cleaning efficiency in various industrial environments; - Precision and Efficiency: The downward-facing nozzles and fluid flow control ensure precise and uniform application of the cleaning fluid, preferably maintaining a constant or at least minimally variable distance from the surface, optimizing efficiency while protecting delicate surfaces, since cleaning can be carried out without contact with the surface. - Stability and Safety: Support systems and / or magnetic suction cups, and more generally anchoring methods, ensure the stability of the device and minimize the risk of tipping and unwanted contact with the surface to be cleaned. - Maneuverability and Mobility: Casters or rail guidance systems facilitate the movement of the device, allowing for quick and efficient positioning on different surfaces. - Versatility: The ability to clean around obstacles and adapt to different surface configurations makes the device versatile, suitable for a wide range of industrial applications. - Compactness and mass: the design in several sub-assemblies of controlled compactness and mass allows transport to site in several modules transportable by manpower, and which can be easily transported in a vehicle trailer. List of reference signs

[0174] - 1. Cleaning device, - 2. Basic chassis, - M1 to M4. Basic chassis uprights, - Tl to T8. Cross members of the basic chassis / . - 20. Welded mechanical structure, -21. Casters, - 22. Guiding element, - Ra. Rails - 3. Telescopic mast - 30, 31, 32. Respectively proximal segment, intermediate segment and distal segment (Telescopic mast), - PR, PD. Respectively retracted position and deployed position of the telescopic mast, - 4. Mechanical interface system for maintaining the proximal segment on the base carriage - 40. (First) joint support, - LP1. First pivot joint -Al. Pivot axis (first joint support) -41, 42. Upright profiles (between which the first hinge support is articulated), - 43, 44. Upright sleeves of the base frame inside which the two upright profiles can slide respectively, and according to several discontinuous adjustment positions, - 45. Second joint support, - LP2. Second pivot joint, - A2. Second pivot axis (second articulation support 45), - 46, 47. Upright profiles (between which the second hinge support is articulated), - 48, 49. Sleeve profiles - 5. Nozzle holder rack - 50. Nozzles, - FP1, FP2. Spray flow (generated by a first nozzle rack and a second rack of the nozzle rack), - CD. Driving, - 6. Motorization mechanism, - 60. Bearing component, -61. Pressure roller, - M Engine, - 62. Hydraulic valve (for the invention of the direction of rotation of the hydraulic motor) - 7. Support system, - 70, 71. Skates, - 8. Anchoring methods, - 80. Magnetic suction cups.

Claims

1. Demands Cleaning device (1) suitable for cleaning elements extending along a surface to be cleaned (SN), such as heat exchanger cooling elements, said device comprising: a) a base frame (2) intended to rest on a support surface, b) a telescopic mast (3) comprising a plurality of telescopic segments (30, 31, 32) including a proximal segment (30) and a distal segment (32), and optionally one or more intermediate segments (31), the telescopic mast configured to move from a retracted position (PR) in which the telescopic segments are retracted into one another to a deployed position (PD) of the telescopic mast in which the segments are deployed relative to one another, c) a mechanical interface system (4) configured to maintain the proximal segment (30) to the base frame (2), and thus the mast cantilevered from the base frame, d) a conduit (CD) for a cleaning fluid guided along the telescopic mast, (e) a nozzle rack (5) comprising at least one spray nozzle, said nozzle rack (5) fixed to the distal segment of the telescopic mast cantilevered from the base frame (2) at least in the deployed position (PD) of the telescopic mast (5), the nozzle(s) (50) hydraulically connected to the line, generating at least one spray stream (FP1, FP2) in a direction transverse to the axial direction of the mast, (f) a motorized mechanism (6) configured to move the mast from the position between the retracted position (PR) and the deployed position (PD), in the direction of deployment and in the direction of retraction of the mast and in which said cleaning device (1) is configured to ensure the cleaning of the elements along the surface to be cleaned, by supplying the line (CD) with a cleaning fluid, under pressure, so as to generate a spray of a cleaning fluid stream, in the direction transverse to said telescopic mast (3),and by activating the motorized mechanism (6) to deploy the telescopic mast cantilevered from the base frame in order to ensure the movement of the, nozzle rack generating the spray flow along the surface to be cleaned.

2. Cleaning device according to claim 1, wherein the telescopic mast (3) extends along an axial direction of the mast at least along a horizontal component (X), and possibly along a vertical component (Z), cantilevered from the base frame (2) from the proximal segment (30) to the distal segment (32), capable of flexing under the action of gravity on the nozzle rack (5), the proximal, distal and possibly intermediate segments, the segments formed by profiles of thickness less than or equal to 2 mm, and wherein the nozzle(s) (50) are oriented downwards configured so that the momentum generated by the water sprayed by the nozzle(s) exerts an action opposing the action of gravity on the nozzle rack configured to ensure a gap between the nozzle rack and the elements of the surface to be cleaned, without contact with the surface to be cleaned.

3. Cleaning device according to claim 2, comprising a means for adjusting the flow of pressurized fluid conveyed by said fluid line (CD) to the nozzle rack (5), comprising a motor-pump unit including a mechanical pump and an electric motor driving the pump, and control electronics including a frequency inverter, configured to allow adjustment of the pump rotation speed.

4. A device according to any one of claims 1 to 3, wherein the nozzle rack (5) comprises a support system (7), comprising one or more pads (70, 71), extending substantially along a plane parallel to the axial axis of the mast, below the nozzle(s) (50), or one or more rolling elements, and the support system or the rolling element(s) configured to bear against the surface to be cleaned (SN) in the event that the action generated by said momentum generated by the water sprayed by the nozzle(s) (50) is insufficient to maintain a gap without contact with the surface to be cleaned, and the pad(s) configured to slide on the surface to be cleaned during the deployment of the telescopic mast or the rolling element(s) configured to roll on the surface to be cleaned during the deployment of the telescopic mast.

5. Device according to any one of claims 1 to 4, wherein the base chassis (2) is a trolley comprising casters (21) configured to move said device along a horizontal surface, and anchoring means (8) configured to immobilize the base chassis (2), and / or the proximal segment (30) to at least one surface of the environment.

6. Device according to claim 5, wherein the anchoring means (8) comprise one or more magnetic suction cups (80) configured to transition from a state configured to anchor to one or more walls of the environment, ferromagnetic, immobilizing the trolley, to a state of magnetic suction cup inactivation, releasing the movement of the trolley.

7. Device according to any one of claims 1 to 6, wherein the mechanical interface system (4) includes means for adjusting the inclination of the longitudinal axis of the telescopic mast relative to the base frame (2), comprising at least one pivot link (LP) allowing articulation of the telescopic mast relative to the base frame (2), along a first axis (Al), orthogonal to the mast.

8. Device according to claim 7, in the interface system (4) includes a means for adjusting the height of said pivot joint (LP)) relative to the base frame and preferably in which the pivot joint (LP) along the first axis (A1) includes a joint support (40) integral with the proximal segment (30) pivotally articulated at its ends to two upright profiles (41, 42) and in which the means for adjusting the height of said pivot joint (LP) include the two upright profiles (41, 42), as well as two sleeve profiles (43, 44) of uprights of the base frame (2), inside the two upright profiles are configured to be telescoped at several adjustable height levels.

9. A device according to claim 8, wherein the articulation support is a first articulation support (40) integral with the proximal segment (30) and free to slide along the proximal segment (30), the means for adjusting the inclination of the longitudinal axis of the telescopic mast relative to the base frame (2), comprising a second articulation support (45) integral with said proximal segment (30) in a position offset along the length of the proximal segment (30), the second articulation support (45) forming a second pivot joint (LP2) along a second axis (A2), parallel to the first axis (Al), the second articulation support (45) pivotally mounted with two second upright profiles (46, 47), the second upright profiles having several adjustable positions of the second pivot joint according to the height of the second upright profiles (46,47).

10. Device according to any one of claims 1 to 9 in which the telescopic segments (30, 31, 32) are tubular profiles inside which runs at least a portion of the length of the conduit (CD), from an opening at the level of an opening of the proximal segment (30) and to an opening of the distal segment (32) at the level of which one or more external conduits (CE) of said telescopic mast supply the nozzle(s) (50) of the nozzle rack (5).

11. Device according to 10, wherein the motorized mechanism (6), configured to telescope the telescopic mast from the retracted position (PR) for which the telescopic segments are retracted to the deployed position (PD), uses the conduit (CD) which combines a conduit function for the cleaning fluid and a transmission function for the movement of the distal segment (32) relative to the proximal segment (30) to retract the mast or, on the contrary, to deploy it, said motorized mechanism (6) comprising a motorization (M) configured to push or, on the contrary, pull the flexible conduit in the proximal segment, and thus deploy or retract the telescopic mast (3), and wherein preferably said motorized mechanism (6) comprising at least one rolling member (60), driven, in rolling contact with the at least partially flexible conduit, and a pressure roller (61) maintaining the flexible conduit in contact with said rolling member.

12. Device according to claim 11, wherein the motorization (M) is a hydraulic motorization, the motorized mechanism (6) comprising a reversing device having a hydraulic valve (62) with three positions: - a first neutral position, prohibiting the circulation of fluid in the motor, - a second position configured for rotating the motor in a first direction of rotation, causing the mast to deploy, - a third position configured for rotating the motor in a second direction of rotation, causing the mast to retract.

13. Device according to any one of claims 1 to 4 and 7 to 11 comprising: - guide rails (Ra), and guide members (22) equipping the base chassis, guided by the guide rails (Ra), configured to allow the sliding of the base chassis assembly (3) and telescopic mast along the direction of the rails, and in particular: - the guide rails (Ra) oriented in a direction perpendicular to the direction of the telescopic mast (3), - each guide rail has a first guide surface (SGI) along which said guide member (22) is configured to slide or roll and a second guide surface (SG2), opposite the first guide surface (SGI), configured to cooperate with said guide member (22) in order to prevent the base carriage from tipping.

14. A method for cleaning a surface to be cleaned (SN) extending along an inclined plane or along a horizontal plane, employing a cleaning device according to any one of claims 1 to 13 comprising a sequence including: / A / positioning the base frame (2) in proximity to the surface to be cleaned, the mast with longitudinal axis substantially parallel to the plane of the surface to be cleaned, in particular in the retracted position of the telescopic mast, / B / supplying the cleaning fluid line and generating at least one spray stream (Fpl, Fp2) by the nozzle(s) (50) of the nozzle rack (5), directed towards the surface to be cleaned (SN), and simultaneously, / C / deploying the telescopic mast (3) so as to move the nozzle rack (5) cantilevered from the base frame (2) in the direction of extension of the telescopic mast so that said at least one spray stream (Fpl, Fp2) sweeps across the surface to be cleaned.

15. A method according to claim 14 implementing said cleaning device according to claim 2 or 3, wherein a maintaining the gap between the nozzle rack and the elements of the surface to be cleaned during deployment in / C / , without contact with the surface to be cleaned, by regulating the fluid flow in / B / preferably controlled according to the deployment of the telescopic mast in / C / so that the quantity of movement generated by said spraying of the nozzles generates an action compensating the action of gravity on the nozzle rack and on the telescopic mast cantilevered from the base carriage (2).

16. A method according to claim 14 implementing said cleaning device according to claim 4, wherein the surface to be cleaned is cleaned, by / C / sliding on the surface to be cleaned via the pads of the support support (7), or by rolling on the surface to be cleaned via the rolling element(s).

17. A method according to any one of claims 14, 15 or 16, comprising a first sequence including the implementation of steps / A / , / B / and / C / wherein the telescopic mast extends along a horizontal component in the direction X and along a vertical component in the direction Z, and in which a method is implemented a second cleaning sequence including a renewal of steps / A / , / B / , and / C / after a movement of the assembly including the base trolley (2), the telescopic mast (3) and the nozzle rack (5) in the direction Y.

18. A method according to claim 17 wherein the first cleaning sequence by the cleaning device (1) and the second cleaning sequence are carried out on either side of an obstacle (OBT) extending outward from the surface to be cleaned, and wherein the movement of the assembly of base trolley (2), telescopic mast (3) and nozzle rack (5) is carried out in the retracted position (PR) of the mast so that said assembly travels under the obstacle (OBT).

19. A method according to any one of claims 15 to 18 in which the elements of the surface to be cleaned are finned radiators of heat exchangers.

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