Handling device for an electrical device

Abstract

Title: Handling device for an electrical device The invention relates to the field of handling devices aimed at meeting the need to move material into or out of a compartment, respectively, the compartment being raised above ground level by a slab serving as a floor for the compartment, for example. The proposed handling device protects operators and the materials being handled. More particularly, it minimizes the risk of falls or accidents thanks to its stability. Furthermore, the proposed handling device minimizes the time required for handling materials. Another advantage of the proposed handling device is its transportability, particularly due to its small size. Figure for the abstract: Fig. 1.

Description

Title of the invention: Handling device for an electrical device Technical field

[0001] The present invention relates to the field of handling devices intended to meet the need to move material into or out of a lodge, respectively, the lodge being raised above ground level by a slab serving as a floor for the lodge, for example.

[0002] The present invention relates more particularly to a handling device intended to meet the need to bring in or take out an electrical device, such as an electrical transformer, which may weigh more than 35 kg, preferably more than 100 kg, or even much more (3500 kg or more for example), into or from a lodge raised above ground level, respectively. STATE OF THE ART

[0003] In order to extract or introduce an electrical transformer from or into a lodge raised above the outside ground, a fairly rudimentary method is still used for the time being.

[0004] The latter consists of installing wooden wedges on the ground outside the lodge, at the access door to it, then arranging, partly inside the lodge on the slab and partly on the wooden wedges, metal rails on which the electrical transformer is then brought to be able to move there by rolling on its wheels, more particularly by rolling on its rollers. This bringing requires pushing of the transformer by an operator located in the lodge at the rear of the electrical device, and jointly lifting by lever effect and pulling of the transformer by at least one other operator located outside the lodge. Often, the wooden wedges do not allow for a horizontal arrangement of the metal guide rails, and the center distance between the metal rails is not necessarily constant.

[0005] This rudimentary way of proceeding involves too many security problems for both personnel and equipment.

[0006] It is clear from the above that it is necessary to propose a solution, preferably easily transportable, aimed at enabling the management of the insertion and extraction of an electrical device, in particular with a weight substantially greater than 35 kg, preferably substantially greater than 100 kg, minimizing the risks for operators and equipment and / or minimizing the necessary handling time and / or adapting to the different formats of the electrical devices to be handled. SUMMARY

[0007] To achieve this objective, according to one embodiment, a handling device is provided for an electrical device, such as an electrical transformer, to be extracted or introduced from or into a compartment respectively, the compartment comprising a slab raised relative to the level of the ground surrounding the compartment, the handling device comprising: a. two supporting beams each intended to rest, directly or indirectly, by a so-called proximal end on the slab of the lodge at the level of an access door to the lodge, respectively, b. two crosspieces each mechanically connecting the two supporting beams together so as to keep them substantially parallel to each other with a determined center distance corresponding to a gap between front rollers and / or between rear rollers of the electrical device and on which the electrical device is configured to be moved at least from front to back and vice versa, c. an elevation control system, relative to the level of the slab of the lodge, of each of the so-called distal ends of the two supporting beams, the elevation control being carried out relative to the ground level up to at least the level of the slab of the lodge, to bring the two supporting beams substantially horizontal, so that, when extracting or introducing the electrical device from or into the box respectively, the supporting beams can receive the load represented by the electrical device, allow the electrical device to roll on its rollers in a substantially horizontal direction, and allow, after extraction or before introduction, to support the electrical device outside the box, substantially horizontally and at the level of the slab of the box, so that the electrical device can be craned there.

[0008] The handling device as introduced above allows the protection of operators and that of the materials handled. More particularly, it allows minimization of the risks of falling or accidents thanks to its stability.

[0009] Furthermore, the handling device as introduced above makes it possible to achieve a minimization of the time required for handling the material.

[0010] Another advantage of the handling device as introduced above consists of its transportability, in particular due to its small size.

[0011] A second aspect of the invention relates to the use of a handling device as introduced above, for extracting or introducing an electrical device, such as an electrical transformer, from or into a box respectively, the box comprising a slab raised relative to the level of the ground surrounding the box. BRIEF DESCRIPTION OF THE FIGURES

[0012] The aims, objects, as well as the characteristics and advantages of the invention will emerge more clearly from the detailed description of an embodiment thereof which is illustrated by the following accompanying drawings in which:

[0013] [Fig-1] [Fig.l] represents a perspective view of an embodiment of the handling device according to the invention.

[0014] [Fig.2] [Fig.2] represents a top view of the embodiment which is illustrated in [Fig.l].

[0015] [Fig.3] [Fig.3] represents a longitudinal side view of the embodiment which is illustrated in [Fig.l].

[0016] [Fig.4] [Fig.4] represents a cross-sectional side view of the embodiment which is illustrated in [Fig.l].

[0017] [Fig.5] [Fig.5] represents the view illustrated in [Fig.2] with a different center distance between the supporting beams of the handling device.

[0018] The drawings are given as examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily to the scale of practical applications. In particular, the dimensions indicated are for information purposes only and are not limiting of the invention. DETAILED DESCRIPTION

[0019] Before beginning a detailed review of embodiments of the invention, optional features which may possibly be used in combination or alternatively are set out below:

[0020] According to one example, a first of the two crosspieces mechanically holds the two supporting beams together by their distal ends and a second of the two crosspieces mechanically holds the two supporting beams together by their proximal ends.

[0021] According to one example, the crosspieces extend below the supporting beams.

[0022] According to one example, the handling device further comprises a system of adjustment and locking of the center distance between the two supporting beams.

[0023] According to the previous example, the two crosspieces being mechanically connected to the two supporting beams so as to be substantially perpendicular to them, the system for adjusting and locking the center distance between the two supporting beams comprises at least: a. two bores of substantially oblong shape made in each of the two crosspieces in a longitudinal direction of each crosspiece, and b. two fixing bolts for sliding each of the two supporting beams in each of the bores.

[0024] According to one and / or the other of the two preceding examples, the two crosspieces being mechanically connected to the two supporting beams so as to be substantially perpendicular to them, the system for adjusting and locking the center distance between the two supporting beams comprises at least, on each upper surface of the two crosspieces, a series of marks defining two by two typical center distance lengths for different electrical devices. According to this example, the handling device offers flexibility with respect to the electrical devices to be handled, in particular with regard to the flexibility of the center distances between the supporting beams of the handling device.

[0025] According to one example, the elevation control system comprises at least, at each end of a first of the two which mechanically holds the two supporting beams together by their distal ends, a threaded rod passing substantially perpendicularly through the first crosspiece, a first bolt for adjusting the height of the end in question of the first crosspiece, a counter-bolt located opposite the adjustment bolt relative to the first crosspiece, a first so-called upper end of each threaded rod being fixed to a fixed bolt intended to collaborate with a crank, preferably removable, of the handling device and configured to be able to drive each threaded rod in rotation on its axis and a second so-called lower end of each threaded rod being fixed to a foot of the handling device.According to this example, the handling device is advantageously purely mechanical and inexpensive, particularly relative to an elevation control system which would consist of using cylinders or other mechanical or hydraulic jacks, or even air cushions.

[0026] According to the previous example, each foot is mechanically linked to the second so-called lower end of the corresponding threaded rod by a spherical connection.

[0027] According to one example, at least one foot, preferably each foot, is of a characteristic dimension at least twice the diameter of the threaded rod with which it is associated and / or has a lower surface made of a non-slip material.

[0028] According to another example, the handling device comprises a member for fixing the removable crank, so that the handling device can be moved together with the removable crank which allows the adjustment of its attitude.

[0029] According to one example, the handling device further comprises a system for locking the handling device in position relative to the doorframe of access to the lodge. According to this example, the handling device, once installed, is particularly stable in the three directions of space. This advantage is also to be appreciated in view of the rigidity of the structure that constitutes the handling device.

[0030] According to the previous example, the locking system comprises, for each of the supporting beams, a rod fixed free in translation along the supporting beam cor corresponding and free to rotate on its axis, and a locking bar fixed substantially perpendicularly to a proximal end of the rod, each rod being of a length suitable for allowing it to go beyond the proximal end of the supporting beam along which it is fixed free in translation and each rod being free to rotate around its axis, so that, by rotations of the rod, the locking bar associated with it can successively be folded to pass through the access door to the box, then deployed on the other side of the access door to be put under tension and block a movement, at least of withdrawal, of the handling device relative to the box.

[0031] According to an alternative or complementary example to the previous one, the locking system may comprise a doweling or screwing of the second crosspiece into a part of the floor of the lodge which is located substantially at the level of the doorframe of access to the lodge, for example in a part of a concrete slab constituting the floor of the lodge.

[0032] According to one example, the so-called proximal ends of the two supporting beams project relative to a second of the two crosspieces which mechanically holds the two supporting beams together by their proximal ends, so that its proximal ends can rest on the slab of the lodge and so that the second crosspiece comes to bear on a lateral edge of the slab at the level of the access door to the lodge.

[0033] According to one example, at least one, preferably each, supporting beam takes the form of a U-shaped profile configured to guide the translational movement of the electrical device on its rollers.

[0034] According to one example, at least one, preferably each, supporting beam is made from a material and takes on dimensions and a shape suitable for allowing a maximum deflection of deformation under load of the electrical device of less than 1 / 300th.

[0035] According to one example, the handling device further comprises a two-dimensional level control system, such as a two-dimensional spirit level, arranged, preferably substantially centrally, on the first of the two crosspieces which mechanically holds the two supporting beams together by their distal ends. According to this example, the handling device has easy positioning.

[0036] According to one example, the handling device may have a weight substantially equal to 100 kg, preferably less than 150 kg, and / or minimum dimensions preferably less than 1500 by 2000 mm, and preferably substantially equal to 1200 by 1500 mm.

[0037] According to one example, the handling device further comprises a winch or pulley fixed at least in part to at least one other element of the handling device. maintenance, and for example fixed to the first crosspiece of the handling device, and configured to facilitate the movement of the electrical device by operators from a loaded configuration of the handling device and / or from a not yet loaded configuration of the handling device.

[0038] An element based on a material A is understood to mean an element comprising this material A and possibly other materials.

[0039] A parameter “substantially equal / greater / less than” a given value means that this parameter is equal / greater / less than the given value, plus or minus 20%, or even 10%, close to this value. A parameter “substantially between” two given values ​​means that this parameter is at least equal to the smallest given value, plus or minus 20%, or even 10%, close to this value, and at most equal to the largest given value, plus or minus 20%, or even 10%, close to this value.

[0040] It is specified that, in the context of the present invention, the relative terms "on", "under", "above", "below" do not necessarily mean "in direct contact with". Furthermore, these terms are to be appreciated for an operational configuration of the handling device according to the invention.

[0041] Below, the term "proximal" means the quality of a part of an element which is close to the electrical device to be handled and the term "distal" means the quality of a part of an element which is far from the electrical device to be handled.

[0042] The relative terms "forward" and "backward", as well as their derivatives or equivalents, refer to a direction of advancement of the electrical device with a view to extracting it from, or introducing it into, a compartment.

[0043] The term "lodge" here designates a place of installation of the electrical device from which the latter cannot be directly craned; it is therefore necessary to remove it from its lodge or conversely to introduce it to handle it to or from a position from which it will be possible to crane the electrical device, respectively. Other terms could replace the term "lodge", such as "room" or "covered elevation", which reflect the same difficulty of handling the electrical device from or into a structure that is sufficiently cluttered or covered so that it cannot be craned directly. Potentially, this will typically be the case when the structure includes a concrete beam and / or a self-supporting retention tank.

[0044] An embodiment of the handling device 1 according to the invention is described below with reference to the appended figures.

[0045] The handling device 1 is dedicated to the handling of an electrical device (not illustrated in the figures), such as an electrical transformer.

[0046] This type of electrical equipment is generally of a significant weight, typically exceeding 35 kg, often in the order of several hundred kilos, and possibly reaching 3.5 T and more. Which requires precautions regarding its handling, to protect personnel and their health, but also to guarantee the integrity of the equipment.

[0047] These electrical devices are often mounted operationally in cramped niches or boxes, so as to save the space they take up. Maintenance operations, or replacements of such electrical devices, lead to extracting or introducing such an electrical device from or into a box respectively, through a door provided for this purpose. The box generally comprises a slab raised relative to the level of the ground surrounding the box, which leads to the handling problems mentioned in the introduction.

[0048] The handling device 1 according to the invention aims to respond to these problems.

[0049] With reference to [Fig.l], as well as to the others, the handling device 1 comprises at least one of: a. two supporting beams 11 and 12, and b. two crosspieces 13 and 14.

[0050] The two supporting beams 11 and 12 are each intended to rest, directly or indirectly, by a so-called proximal end 111 and 121 on the slab of the lodge at the level of the access door to the lodge, respectively.

[0051] The two crosspieces 13 and 14 each mechanically connect the two supporting beams (11 and 12) together so as to keep them substantially parallel to each other with a determined center distance (1112) corresponding to a gap between front rollers and / or between rear rollers of the electrical device and on which the electrical device is configured to be moved at least back and forth and vice versa. The crosspieces 11 and 12 could cross each other so as to form a cross at the ends of which each supporting beam would be fixed, in pairs. However, it is preferred that the crosspieces 13 and 14 be parallel to each other, as illustrated in the figures.

[0052] The handling device 1 according to the embodiment illustrated in the figures may further comprise an elevation control system 15.

[0053] The elevation control is relative to the level of the slab of the lodge and concerns each of the so-called distal ends 112 and 122 of the two supporting beams 11 and 12. The elevation control can be carried out relative to the ground level up to at least the level of the slab of the lodge. It makes it possible to bring the two supporting beams 11 and 12 substantially horizontal. The sensitivity of the desired horizontality can be defined as comprising the values ​​in the range from -10° to 10° relative to the strict horizontal. Depending on the circumstances of the handling operation to be carried out, it may in fact be advantageous to provide a certain difference in level on the path of the electrical device defined by the supporting beams 11 and 12.

[0054] The handling device 1 as introduced above allows, during the extraction of the electrical device from its housing, that the supporting beams 11 and 12 can receive from the slab the load represented by the electrical device rolled in a substantially horizontal direction on its rollers, and allow, after extraction, to support the electrical device outside the housing, substantially horizontally and at the level of the slab of the housing, so that the electrical device can be craned from there.

[0055] The handling device 1 as introduced above also allows, when introducing the electrical device into a box, that the supporting beams 11 and 12 can receive the load represented by the electrical device by being craned onto the supporting beams, then rolled in a substantially horizontal direction on its rollers, and allow, before introduction, to support the electrical device outside the box, substantially horizontally and at the level of the slab of the box.

[0056] According to the embodiment illustrated in the figures, the elevation control system 15 may comprise at least, at each end 131 and 132 of a first 13 of the two crosspieces 13 and 14 which mechanically holds the two supporting beams 11 and 12 between them by their distal ends 112 and 122, a threaded rod 151 passing substantially perpendicularly through the first crosspiece 13. A first adjustment bolt 153 of the height of the end 131 or 132 considered of the first crosspiece 13, a counter-bolt 154 located opposite the adjustment bolt 153 relative to the first crosspiece 13, may complete the elevation control system 15.The counterbolt 154 can advantageously be used to secure, for the equipment and the operators, the handling that the handling device 1 allows according to the first aspect of the invention, in particular by preventing a descent of the handling device, and more particularly of the first crosspiece 13, when the electrical device is loaded onto the handling device 1.

[0057] A first end called the upper end 1511 of each threaded rod 151 can be fixed to a fixed bolt 152, for example intended to collaborate with a crank 156, preferably removable, of the handling device 1, or alternatively with an electric screwdriver, a ratchet wrench, a flat wrench, a socket wrench, etc. configured to be able to rotate on its axis each threaded rod 151. A second end called the lower end 1512 of each threaded rod 151 can be fixed to a foot 155 of the handling device 1. The handling device 1 can thus advantageously be purely mechanical and inexpensive, in particular relative to an elevation control system which would consist of implementing cylinders or other mechanical or hydraulic jacks, or even air cushions. These latter possibilities would however make it possible to control the cylinders, jacks or cushions remotely via a remote control, which could be particularly advantageous in the case of particularly risky handling.

[0058] Preferably, each foot 155 of the handling device 1 is mechanically connected to the second so-called lower end 1512 (Cf. [Fig.l]) of the corresponding threaded rod 151 by a spherical connection. This makes it possible to absorb any defects in the flatness of the ground surrounding the lodge.

[0059] The embodiment illustrated in the figures, and in particular as illustrated in [Fig.2], further comprises, in a non-limiting manner, a system 16 for adjusting and locking the center distance 1112 between the two supporting beams 11 and 12. It will be noted that the adjustment and locking system 16 also appears in the attached [Fig.5], but in a less visible manner due to the fact that the center distance 1112 is, in this figure, reduced compared to that illustrated in [Fig.2].

[0060] In the example illustrated in the figures, where the two crosspieces 13 and 14 are mechanically connected to the two supporting beams 11 and 12 so as to be substantially perpendicular to them, the system 16 for adjusting and locking the center distance 1112 between the two supporting beams 11 and 12 may comprise at least: a. two bores 161 and 162 of substantially oblong shape made in each of the two crosspieces 13 and 14 in a longitudinal direction of each crosspiece, and b. two fixing bolts 163 and 164 for sliding each of the two supporting beams 11 and 12 in each of the bores 161 and 162. Here again, the handling device 1 remains essentially mechanical, and consequently inexpensive, particularly relative to motorized solutions.

[0061] As an alternative or in addition, the adjustment and locking system 16 of the center distance 1112 between the two supporting beams 11 and 12 may comprise at least, on each upper surface of the two crosspieces 13 and 14, a series of marks defining two by two typical center distance lengths for different electrical devices.The handling device thus offers flexibility with regard to the electrical devices to be handled, in particular with regard to the flexibility of the center distances between the supporting beams of the handling device, which makes it possible to adapt the handling device easily and quickly to different types of commonly encountered electrical devices.

[0062] As particularly illustrated in Figures 1 and 5, the handling device 1 may further comprise a locking system 17 in position of the handling device relative to the access door to the box. According to this example, the handling device, once installed, is particularly stable in the three directions of space, the front and back movements are made impossible thanks to the pincer (or sandwich) grip between the frame of the access door to the box and the support supporting beams 11 and 12 against the slab of the lodge. An additional non-essential safety feature may also consist of screwing the supporting beams 11 and 12 into the slab. Lateral movement, from left to right, of the handling device 1 is also prevented by means of the four supports which constitute: a. Each support of the supporting beams against the slab and b. Each support at ground level thanks to the non-slip feet 155 of the handling device 1, with in particular a wide ground footprint. The latter can also, if necessary, be further increased by placing rigid plates wider than the feet under the feet of the handling device, in particular to prevent the handling device 1 loaded with the electrical device from sinking into soft ground.

[0063] More particularly, the so-called proximal ends 111 and 121 of the two supporting beams 11 and 12 preferably project relative to a second 14 of the two crosspieces 13 and 14 which mechanically holds the two supporting beams 11 and 12 together by their proximal ends 111 and 121. In this way the proximal ends 111 and 121 of the supporting beams 11 and 12 can rest on the slab of the lodge and the second crosspiece 14 can come to bear on a lateral edge of the slab at the level of the access door to the lodge.

[0064] The locking system 17 may more particularly comprise, for each of the supporting beams 11 and 12, a rod 171 fixed free in translation along the corresponding supporting beam and free in rotation on its axis, and a locking bar 172 fixed substantially perpendicularly to a proximal end 1711 of the rod 171. Each rod 171 may be of a length suitable for allowing it to go beyond the proximal end 111 or 121 of the supporting beam 11 or 12 along which it is fixed free in translation. Likewise, each rod 171 can be free to rotate around its axis, so that, by rotations of the rod, the locking bar 172 associated with it can successively be folded back to pass through the access door to the compartment, then deployed on the other side of the access door to be put under tension and block a movement, at least of withdrawal, of the handling device 1 relative to the compartment.These characteristics of the 17 barrier blocking system can be used to give a certain compactness to the handling device 1, compactness which is appreciable in particular when it comes to moving it on site or storing it.

[0065] As particularly illustrated in [Fig.l], at least one, preferably each, supporting beam 11 and 12 may take the form of a U-shaped profile configured to guide the translational movement of the electrical device on its rollers. The bottom of the U-shaped profile is obviously preferably oriented downwards.

[0066] Furthermore, at least one, preferably each, supporting beam 11 and 12 may be made from a material and take on dimensions and a shape suitable for allowing a maximum deformation arrow under load of the electrical device less than 1 / 300th

[0067] Advantageously, the handling device 1 may further comprise a two-dimensional spirit level 18, arranged, preferably substantially centrally, on the first 13 of the two crosspieces 13 and 14 which mechanically holds the two supporting beams 11 and 12 between them by their distal ends 112 and 122, as particularly illustrated in FIGS. 1, 2 and 5. The handling device 1 thus has easier positioning.

[0068] It is clear from the above that the handling device 1 may have a weight substantially equal to 100 kg, preferably less than 150 kg, and / or minimum dimensions (because in a retracted configuration) preferably less than 1500 by 2000 mm, and preferably substantially equal to 1200 by 1500 mm. Note that these dimensions are given for illustrative purposes and make it possible to respond to a large part of the practical cases encountered, i.e. that they make it possible to respond to the aforementioned handling problem for a wide range of electrical devices. If, however, the latter had much larger dimensions and / or a much higher weight and / or a much larger center distance and / or rollers of much larger dimensions, it is envisaged that the handling device would be sized to respond to the increased constraints then encountered.In this sense, the handling device 1 can have a weight of up to 3T or more, and / or minimum dimensions (because in a retracted configuration) of up to 3 by 3 m, while remaining advantageous in functional terms and / or in terms of transportability.

[0069] Furthermore, it is envisaged that the handling device 1 according to the first aspect of the invention further comprises a winch or pulley fixed at least in part to at least one other element of the handling device 1, and for example fixed to the first crosspiece 13, and configured to facilitate the movement of the electrical device by the operators from a loaded configuration of the handling device 1 to the lodge, or from a not yet loaded configuration of the handling device outside the lodge. An anchoring point, or more particularly a pulley, being where appropriate fixed to a wall of the lodge to cooperate with the winch or pulley.

[0070] The proposed handling device makes it possible at the very least to improve the protection of operators and that of the materials handled. More particularly, it makes it possible to achieve a minimization of the risks of falling or accidents thanks to its stability. Furthermore, the proposed handling device makes it possible to achieve a minimization of the time required for handling the materials. Another advantage of the proposed handling device consists of its transportability, in particular due to its small size and / or its relatively low weight.

[0071] The invention is not limited to the embodiment previously described and extends to all embodiments covered by the invention.

Claims

Claims

1. A handling device (1) for an electrical device, such as an electrical transformer, to be extracted or introduced from or into a housing respectively, the housing comprising a slab raised relative to the ground level surrounding the housing, the handling device comprising: • two supporting beams (11 and 12) each intended to rest by a so-called proximal end (111 and 121) on the slab of the lodge at the level of an access door to the lodge, respectively, • two crosspieces (13 and 14) each mechanically connecting the two supporting beams (11 and 12) together so as to keep them substantially parallel to each other with a determined center distance (1112) corresponding to a gap between front rollers and / or between rear rollers of the electrical device and on which the electrical device is configured to be moved at least from front to back and vice versa, • an elevation control system (15), relative to the level of the slab of the lodge, of each of the so-called distal ends (112 and 122) of the two supporting beams (11 and 12), the elevation control being carried out relative to the ground level up to at least the level of the slab of the lodge, to bring the two supporting beams (11 and 12) substantially horizontal, so that, when extracting or introducing the electrical device from or into the box respectively, the supporting beams (11 and 12) can receive the load represented by the electrical device, allow the electrical device to roll on its rollers in a substantially horizontal direction, and allow, after extraction or before introduction, to support the electrical device outside the box, substantially horizontally and at the level of the slab of the box, so that the electrical device can be craned there.

2. Handling device (1) according to the preceding claim, further comprising a system for adjusting and locking (16) the center distance (1112) between the two supporting beams (11 and 12).

3. Handling device (1) according to the preceding claim, in which, the two crosspieces (13 and 14) being mechanically connected to the two supporting beams (11 and 12) so as to be substantially perpendicular to them, the system for adjusting and locking (16) the center distance (1112) between the two supporting beams (11 and 12) comprises at least: • two bores (161 and 162) of substantially oblong shape made in each of the two crosspieces (13 and 14) in a longitudinal direction of each crosspiece, and • two fixing bolts (163 and 164) for sliding each of the two supporting beams (11 and 12) in each of the bores (161 and 162).

4. Handling device (1) according to any one of the two preceding claims, in which, the two crosspieces (13 and 14) being mechanically connected to the two supporting beams (11 and 12) so as to be substantially perpendicular to them, the system for adjusting and locking (16) the center distance (1112) between the two supporting beams (11 and 12) comprises at least, on each upper surface of the two crosspieces (13 and 14), a series of marks defining two by two typical center distance lengths for different electrical devices.

5. Handling device (1) according to any one of the preceding claims, in which the elevation control system (15) comprises at least, at each end (131 and 132) of a first (13) of the two crosspieces (13 and 14) which mechanically holds the two supporting beams (11 and 12) between them by their distal ends (112 and 122), a threaded rod (151) passing substantially perpendicularly through the first crosspiece (13), a first adjustment bolt (153) for the height of the end (131 or 132) in question of the first crosspiece (13), a counter-bolt (154) located opposite the adjustment bolt (153) relative to the first crosspiece (13), a first so-called upper end (1511) of each threaded rod (151) being fixed to a fixed bolt (152) intended to collaborate with a crank (156), preferably removable,of the handling device (1) and configured to be able to rotate each threaded rod (151) on its axis and a second end called lower (1512) of each threaded rod (151) being fixed to a foot (155) of the handling device (1).,

6. Handling device (1) according to the preceding claim, in in which each foot (155) is mechanically linked to the second so-called lower end (1512) of the corresponding threaded rod (151) by a spherical connection.

7. Handling device (1) according to any one of the preceding claims, further comprising a locking system (17) in position of the handling device relative to the doorframe of access to the lodge.

8. Handling device (1) according to the preceding claim, in which the locking system (17) comprises, for each of the supporting beams (11 and 12), a rod (171) fixed free in translation along the corresponding supporting beam and free in rotation on its axis, and a locking bar (172) fixed substantially perpendicularly to a proximal end (1711) of the rod (171), each rod (171) being of a length suitable for allowing it to go beyond the proximal end (111 or 121) of the supporting beam (11 or 12) along which it is fixed free in translation and each rod (171) being free in rotation around its axis, so that, by rotations of the rod, the locking bar (172) associated with it can successively be folded to pass through the access door to the compartment, then deployed on the other side of the access door to be power on and block a movement, at least withdrawal,of the handling device (1) relative to the lodge.,

9. Handling device (1) according to any one of the preceding claims in which the so-called proximal ends (111 and 121) of the two supporting beams (11 and 12) project relative to a second (14) of the two crosspieces (13 and 14) which mechanically holds the two supporting beams (11 and 12) together by their proximal ends (111 and 121), so that its proximal ends (111 and 121) can rest on the slab of the box and so that the second crosspiece (14) comes to bear on a lateral edge of the slab at the level of the access door to the box.

10. Handling device (1) according to any one of the preceding claims, wherein at least one, preferably each, supporting beam (11 and 12) takes the form of a U-shaped profile configured to guide the translational movement of the electrical device on its rollers.

11. A handling device (1) according to any preceding claim, wherein at least one, preferably each, beam supporting (11 and 12) is based on a material and takes dimensions and a shape suitable for allowing a maximum deflection of deformation under load of the electrical device less than l / 300th.

12. Handling device (1) according to any one of the preceding claims, further comprising a two-dimensional level control system (18), such as a two-dimensional spirit level, arranged, preferably substantially centrally, on the first (13) of the two crosspieces (13 and 14) which mechanically holds the two supporting beams (11 and 12) together by their distal ends (112 and 122).

13. Handling device (1) according to any one of the preceding claims, further comprising a winch or pulley fixed at least in part to at least one other element of the handling device (1), and for example fixed to the first crosspiece (13) of the handling device (1), and configured to facilitate the movement of the electrical device by the operators from a loaded configuration of the handling device (1) and / or from a not yet loaded configuration of the handling device (1).

14. Use of a handling device (1) according to any one of the preceding claims, for extracting or introducing an electrical device, such as an electrical transformer, from or into a lodge respectively, the lodge comprising a slab raised relative to the level of the ground surrounding the lodge.

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