Calibration instrument for a leak detection device

Abstract

The invention relates to a calibration instrument (1) for a leak detection device, comprising a casing (3), one or more fluidic devices (4, 5, 6), one or more connecting parts (51), and one or more attachment members, wherein each of the fluidic devices (4, 5, 6) comprises a duct and a pressure-reducing member arranged in the duct so as to limit the flow of a fluid between a first portion of the duct and a second portion of the duct, wherein the one or more connecting parts (51) are configured to hold one or more of the fluidic devices (4, 5, 6) in position relative to the casing (3), and wherein the one or more attachment members are configured to reversibly attach the one or more connecting parts (51) to the casing (3).

Description

CALIBRATION INSTRUMENT FOR LEAK DETECTION DEVICE technical field

[0001] The invention relates to the field of leak testing and in particular to the detection of leaks on objects or products such as batteries, perfume bottles, containers, valves, etc.

[0002] The invention relates more specifically to a calibration instrument, also called a "leak calibrator", allowing the calibration of a leak detection device. Prior art

[0003] Calibration instruments are generally used in industry to test, adjust and / or calibrate leak detection devices equipping production lines.

[0004] Indeed, the measurement quality of leak detection devices is likely to vary over time, for example due to wear and / or aging of their components, temperature fluctuations, humidity, shocks, etc., which requires readjusting their measurement chain (converter, sensor, etc.).

[0005] A conventional calibration instrument typically includes a pipe equipped with a differential pressure device to simulate a predefined artificial leak, and a sensor designed to measure the corresponding pressure difference, forming a device here called a "fluidic device".

[0006] To recalibrate a leak detection device, it is typically connected to the fluidic device line of such a calibration instrument. Recalibration is performed by comparing measurements taken by the sensor of the fluidic device of the calibration instrument with measurements taken by the leak detection device.

[0007] There is a need to facilitate the assembly and disassembly of fluidic devices of prior art calibration instruments, particularly in the context of their servicing or maintenance operations. Description of the invention

[0008] To this end, the invention relates to a calibration instrument for a leak detection device, comprising: - an envelope, - one or more fluidic devices, each comprising: ■ conduct and ■ a pressure-reducing device arranged in the pipe so as to limit the flow of a fluid between a first part of the pipe and a second part of the pipe, - one or more connecting parts that are configured to maintain one or more of said fluidic devices in a so-called operating position relative to the casing, - one or more fastening devices configured to reversibly fix one or more of said connecting parts to the casing.

[0009] In one embodiment, one or more of said fastening members are configured to reversibly fix one or more of said fluidic devices to one or more of said connecting parts.

[0010] In one embodiment, one or more of said connecting parts include a part such as a sheet metal or plate shaped to present: - a first surface configured to bear against a surface of at least one of said fluidic devices and to be fixed to this fluidic device by one or more of said fixing members, - a second surface configured to rest on a surface of the envelope and to be fixed to the envelope by one or more of said fixing devices.

[0011] In one embodiment, said first surface and said second surface of at least one of said connecting pieces are oblique or perpendicular to each other.

[0012] In one embodiment, for at least one of said connecting parts, the surface of the fluidic device on which said first surface of this part of The linking piece comes to rest on a first surface of this fluidic device, this linking piece also having a third surface configured to come to rest on a second surface of this fluidic device and to be fixed to this fluidic device by one or more of said fixing members.

[0013] In one embodiment, for at least one of said connecting pieces, said first surface of this connecting piece is configured to bear on a first surface of one of said fluidic devices, this connecting piece having a third surface configured to bear on a surface of another of said fluidic devices and to be fixed to this other fluidic device by one or more of said fixing members.

[0014] In one embodiment, one or more of said connecting pieces comprise one or more parts having a U and / or L cross-section.

[0015] In one embodiment, for one or more of said fluidic devices: - the first part of the conduit forms a first end of the fluidic device which is configured to pass through a first wall of the casing when the fluidic device is in the operating position, - the second part of the conduit forms a second end of the fluidic device which is configured to pass through a second wall of the casing when the fluidic device is in the operating position.

[0016] In this case, the said first and second ends form respectively, preferably reversibly, a so-called connecting end and a so-called exhaust end.

[0017] The fitting end can be intended to connect the pipe to the leak detection device.

[0018] The exhaust tip may be intended to establish fluidic communication between the conduit and a space surrounding the instrument.

[0019] In one embodiment, the envelope is configured to house at least part of one or more of said fluidic devices and at least part of one or more of said connecting parts.

[0020] The invention also relates to a method for dismantling an instrument as defined above.

[0021] The process may include a step of removing one or more of said fastening members and / or a step of moving at least one of said fluidic devices from said position of use to another position.

[0022] Without limitation, said displacement may include a simultaneous displacement of an assembly comprising this fluidic device and one of the connecting parts rotating around an axis along which this fluidic device extends in order to place this assembly in an angular position allowing the removal of one or more of said fastening members.

[0023] The invention makes it possible in particular to facilitate the assembly and disassembly of fluidic devices, especially in the context of their maintenance or servicing operations.

[0024] Other advantages and features of the invention will become apparent from the detailed, non-limiting description that follows. Brief description of the drawings

[0025] The detailed description that follows refers to the attached drawings on which: - [Fig. 1] is a schematic perspective view of a calibration instrument according to the invention; - [Fig. 2] is a schematic perspective view of a calibration instrument according to the invention in a configuration in which the instrument covers are removed; - [Fig. 3] is a schematic perspective view of a subset of the instrument in Figure 2, this subset comprising fluidic devices, connecting parts and fastening elements; - [Fig. 4] is a schematic perspective view of one of the fluidic devices, one of the connecting parts and part of the fastening elements of the sub-assembly of figure 3; - [Fig. 5] is a schematic perspective view of two other fluidic devices, another connecting piece and another part of the fastening elements of the subassembly of figure 3; - [Fig. 6] is a schematic longitudinal cross-sectional view of a fluidic device according to the invention, the device comprising a conduit and a differential pressure element; - [Fig. 7] is a schematic perspective view of the deprimogenic organ of the device in Figure 6. Detailed description of implementation methods

[0026] Figure 1 shows a non-limiting example of an instrument 1 according to the invention.

[0027] Instrument 1 is a calibration instrument also called a "calibrator" or "flowmeter".

[0028] By way of non-limitation, instrument 1 can be used to calibrate a leak detection device, for example a device such as a differential pressure variation leak tester.

[0029] Figure 2 shows internal parts of an instrument 1 similar to that of Figure 1.

[0030] With reference to figures 1 and 2, the instrument 1 of the invention comprises in these examples a chassis 2, walls 3A-3E or hoods forming an envelope 3, fluidic devices 4, 5 and 6 and a screen 7.

[0031] Instrument 1 in Figure 1 is in the form of a generally parallelepiped-shaped case, defining a front face IA, a rear face IB, two lateral faces IC and 1D, a lower face 1E and a top face 1F.

[0032] With reference to Figure 2, chassis 2 in this example comprises a front frame 2A, a rear frame 2B, lower cross members 2C and upper cross members 2D.

[0033] The front frame 2A and the rear frame 2B are spaced apart in a direction defining the instrument's depth 1. The lower crossbars 2C are spaced apart from the upper crossbars 2D in a direction defining a height of instrument 1. The lower crossbars 2C are spaced apart in a direction defining the width of instrument 1. Similarly, the upper crossbars 2D are spaced apart in the direction of the width of instrument 1.

[0034] Chassis 2 thus presents: - a front opening formed by the front frame 2A, - a rear opening formed by the rear frame 2B, - a lower opening delimited by a lower edge of frames 2A and 2B and by crossbars 2C, - a top opening delimited by the upper edge of frames 2A and 2B and by crossbars 2D, - a first lateral opening delimited by a first lateral edge of frames 2A and 2B, one of the crossbars 2C and one of the crossbars 2D, - a second lateral opening delimited by a second lateral edge of frames 2A and 2B, the other by crossbars 2C and the other by crossbars 2D.

[0035] In this example, part of the enclosure 3 has a generally U-shaped form, this part being formed by walls 3A and 3B and by a side wall not visible in Figure 1 which is symmetrical to wall 3A. Thus, when this part of the enclosure 3 is assembled to the frame 2 as illustrated in Figure 1, wall 3A covers the first side opening formed by the frame 2, the aforementioned side wall not visible in Figure 1 of the enclosure 3 covers the second side opening formed by the frame 2, and wall 3B covers the upper opening formed by the frame 2. In this configuration, these different walls of the enclosure 3 rest on the edges of the frames 2A and 2B and / or on the cross members 2C and / or 2D of the frame 2.

[0036] With reference to figures 1 and 2, the front frame 2A is arranged towards the rear of the wall 3C of the envelope 3 and is configured to support the screen 7.

[0037] In the assembled configuration of Figure 1, instrument 1 comprises an internal part or volume which is delimited by: - wall 3A of envelope 3 defines the lateral face IC of instrument 1, - said side wall of the envelope 3, not visible in figure 1, which defines the lateral face 1D of the instrument 1, - wall 3B of envelope 3 which defines the upper face 1F of instrument 1, - wall 3C of envelope 3 and screen 7 which define the front face IA of instrument 1, - the 3D wall of the envelope 3 which covers the rear opening of the chassis 2, defining the rear face IB of the instrument 1, - the wall 3E of the envelope 3 which covers the lower opening of the chassis 2 by defining the lower face 1E of the instrument 1.

[0038] The envelope 3 can thus be easily assembled to, or removed from, the chassis 2, in whole or in part.

[0039] In this particular example, the assembly formed by the side walls 3A and the top wall 3B can be mounted or dismounted independently of the other walls of the envelope 3, and vice versa.

[0040] In the non-limiting example of Figure 1, the instrument 1 includes a removable carrying handle s and the screen 7 includes a touch panel forming a user interface.

[0041] Beyond the innovative features of Instrument 1, which are described below and stated in the claims, the general functionalities of Instrument 1 and the various components necessary or useful for its general implementation and use are known to those skilled in the art. Therefore, Instrument 1 is not described exhaustively in this document.

[0042] With reference to figures 2 to 5, the fluidic devices 4, 5 and 6 each comprise a conduit extending along a direction A4, A5 or A6, respectively.

[0043] In this example, each of devices 4, 5 and 6 has a structure similar to that of device 20 which will now be described with reference to figure 6.

[0044] The fluidic device 20 includes a conduit 21 extending along an axis A20.

[0045] Pipe 21 includes a so-called flow opening which passes through it from one side to the other along axis A20.

[0046] In this example, the conduit 21 comprises a part 21A forming a first part of the conduit 21 and a part 21B forming a second part of the conduit 21. these parts 21A and 21B being arranged side by side along the axis A20 so as to define respective parts of said flow opening which are in fluidic communication with each other.

[0047] The first part 21A of the conduit 21 forms a first end of the device 20.

[0048] The second part 21B of the conduit 21 forms a second end of the device 20.

[0049] In the example in Figure 6, the device 20 is equipped with a fitting 22 disposed at its first end, thus called the "fitting end".

[0050] More specifically, the fitting 22 is received here in the part of the opening of the conduit 21 which is formed by the part 21A, also called "first part of the opening", so as to be able to establish a fluidic communication between this opening and an organ or device (not shown) which is connected to the fitting 22.

[0051] The opening of the conduit 21 leads outside the device 20, i.e. into a space surrounding the device 20, through its second end, called the "exhaust end", which in this example is formed by part 21B.

[0052] The device 20 of figure 6 includes a component 25 disposed in the conduit 21.

[0053] The component 25, shown separately in Figure 7, is a differential pressure device, configured to limit a flow of fluid in the conduit 21 between the first part 21A of the conduit 21 and the second part 21B of the conduit 21.

[0054] In other words, the pressure-depriving device 25 is configured to create a pressure loss in the conduit 21, between said first part of the opening of the conduit 21 and the part of the opening formed by the second part 21B of the conduit 21, also called "second part of the opening".

[0055] With reference to the embodiment in Figure 7, the deprimogenic organ 25 comprises a nucleus 26 and wall elements 27.

[0056] In this non-limiting example, the core 26 is solid, extends along the direction A20 and has a diameter smaller than that of the flow opening formed by the pipe 21.

[0057] In this non-limiting example, the wall elements 27 extend circumferentially around the axis A20 and radially outside the core 26.

[0058] The wall elements 27 define openings radially between each other.

[0059] In the configuration of Figure 6, the openings formed by the wall elements 27 of the differential pressure organ 25 establish a fluidic communication between the part of the opening formed by the first part 21A of the conduit 21 and the part of the opening formed by the second part 21B of the conduit 21.

[0060] With reference to figures 2, 3 and 5, each of the fluidic devices 4, 5 and 6 further includes fittings 32A and 32B configured to connect a sensor (not shown).

[0061] For each of devices 4, 5 and 6, the sensor is connected to fittings 32A and 32B in order to measure: - on the one hand, a fluid pressure in the said first part of the pipe's flow opening at which fitting 32A is arranged, - on the other hand, a fluidic pressure in said second part of the flow opening at the level of which fitting 32B is arranged.

[0062] In other words, the sensor is configured to be able to measure a pressure difference in the pipe of each of the fluidic devices 4, 5 and 6, on either side of the differential pressure element housed in the corresponding pipe.

[0063] With reference to figures 3 to 5, the fluidic devices 4, 5 and 6 and in particular the conduits they comprise present in this non-limiting example an overall cylindrical external shape by defining flat surfaces, or flats.

[0064] In this example, the fluidic device 4 includes a flat 41 called lateral and a flat 42 called inferior (see figure 4).

[0065] In this example, the flats 41 and 42 are angularly spaced 90° apart from each other around the axis A4, so that two imaginary planes, each passing through one of the respective flats 41 and 42, are orthogonal.

[0066] In this example, the fluidic devices 5 and 6 each include two flats 43 and 44 called lateral (see figure 5).

[0067] For each of the devices 5 and 6, the flats 43 and 44 are in this example angularly spaced from each other by 180° around the axis A5 or A6, respectively, so that fictitious planes passing each through one of the respective flats 43 and 44 are parallel.

[0068] In the configuration of Figure 2, the lateral flat 41 of device 4 and the lateral flats 43 and 44 of devices 5 and 6 are all parallel to each other and extend each in relation to one or the other of the lateral openings formed by the frame 2.

[0069] In the configuration of Figure 2, the lower flat 42 of the device 4 extends opposite the lower opening of the chassis 2.

[0070] With reference to figures 2 to 5, instrument 1 includes connecting parts 51 and 52.

[0071] By way of non-limitation, parts 51 and 52 are herein folded metal sheets or plates.

[0072] In this example, part 51 comprises three parts 51A, 51B and 51C giving it a U-shaped cross-section, parts 51A and 51B being parallel to each other and perpendicular to part 51C.

[0073] With reference to figures 3 and 5, part 51 is dimensioned so that the distance between parts 51A and 51B is greater than the distance between flats 43 and 44 of the fluidic device 6 and so that part 51A can rest on flat 44 of device 6 while leaving a space between part 51C and device 6.

[0074] In the example shown in Figures 3 and 4, part 52 comprises four sections 52A, 52B, 52C, and 52D. Sections 52A and 52C are parallel to each other, while sections 52B and 52D are parallel to each other and perpendicular to sections 52A and 52C. Sections 52A and 52B together form an L-shaped cross-section. Similarly, sections 52C and 52D together form an L-shaped cross-section.

[0075] With reference to Figures 3 and 4, part 52 is dimensioned so that the height H1 of part 52C is less than the height H2 of part 52A, so that part 52A can rest on the flat 41 of device 4 and that part 52D can to rest on the flat 42 of device 4, leaving a space between part 52B and device 6.

[0076] In the configuration shown in Figures 2 and 3, and also with reference to Figure 5: - Part 51A of the connecting piece 51 has an internal surface S51A bearing against the flat 44 of the device 6, - Part 51B of the connecting piece 51 has an external surface S51B bearing against the flat 44 of the device 6, - the part 51C of the connecting piece 51 has an external surface S51C bearing against the lower wall 3E of the envelope 3.

[0077] Independently, in the configuration of figures 2 and 3 and also with reference to figure 4: - Part 52A of the connecting piece 52 has an internal surface S52A bearing against the flat 41 of the device 4, - Part 52D of the connecting piece 52 has an internal surface S52D bearing against the flat 42 of the device 4, - part 52B of the connecting piece 52 has an external surface S52B bearing against the lower wall 3E of the envelope 3.

[0078] In this example, instrument 1 includes fasteners which, but not limited to, include fixing screws.

[0079] With reference to Figure 5, two of the fixing screws are configured to fix part 51A of the connecting piece 51 to the device 6. For this purpose, the device 6 includes two threaded holes which open onto the flat 44 of this device 6 and part 51A of the connecting piece 51 includes two corresponding openings for the passage of these screws.

[0080] Two other fixing screws are configured to fix part 51B of the connecting piece 51 to the device 5. For this purpose, the device 5 also includes two threaded holes which open onto the flat 44 of this device 5 and part 51B of the connecting piece 51 includes two corresponding openings for the passage of these screws.

[0081] With reference to Figure 4, two other fixing screws are configured to fix part 52A of the connecting piece 52 to the device 4. For this purpose, the device 4 includes two threaded holes that open onto the flat 41 of this device 4 and the Part 52A of the connecting piece 52 includes two corresponding openings for the passage of these screws.

[0082] Two other fixing screws are configured to fix part 52D of the connecting piece 52 to the device 4. For this purpose, the device 4 includes two other threaded holes which open onto the flat 42 of this device 4 and part 52D of the connecting piece 52 includes two corresponding openings for the passage of these screws.

[0083] With reference to figures 3 and 4, other fixing screws are used to fix the connecting parts 51 and 52 to the lower wall 3E of the envelope 3, in cooperation with corresponding nuts.

[0084] In this particular example, four fixing screws and four corresponding nuts are used to fix the connecting piece 51 to the lower wall 3E of the envelope 3, this wall 3E comprising for this purpose four openings for the passage of these screws, the part 51C of the connecting piece 51 also comprising four corresponding openings for the passage of these screws.

[0085] In this example, two fixing screws and two corresponding nuts are used to fix the connecting piece 52 to the lower wall 3E of the envelope 3, this wall 3E comprising for this purpose two additional openings for the passage of these screws, the part 52B of the connecting piece 52 also comprising two corresponding openings for the passage of these screws.

[0086] In the configuration of Figure 2, the connecting parts 51 and 52 thus allow the fluidic devices 4, 5 and 6 to be maintained in a so-called operating position relative to the envelope 3 and the chassis 2.

[0087] In addition, the aforementioned fastening elements allow the connecting parts 51 and 52 to be reversibly fixed on the one hand to the casing 3 and, on the other hand, to the fluidic devices 4, 5 and 6.

[0088] In the operating position illustrated in Figure 2, the fluidic devices 4, 5 and 6 extend into the internal volume of the instrument 1 such that their connecting end passes through respective openings in the wall 3C of the envelope 3 to exit outside the instrument 1 and their exhaust end passes through respective openings in the wall 3D of the envelope 3 to exit outside the instrument 1.

[0089] Envelope 3 thus houses part of the fluidic devices as well as the connecting parts when instrument 1 is assembled.

[0090] Such an architecture makes it easier to assemble and disassemble one or more of the fluidic devices 4, 5 and 6.

[0091] From the assembled configuration, one or more of the fluidic devices 4, 5 and 6 can be disassembled by implementing the corresponding steps that follow, which are in no way exhaustive: - removal of the part of the envelope 3 formed by the side walls 3A and the top wall 3B, - detachment of connecting parts 51 and 52 from the casing 3, this step may include removing the screws fixing connecting parts 51 and 52 to the lower wall 3E of the casing 3, - Removal of the fluidic device 4, this step may include: ■ removal of the screws fixing part 52A of the connecting piece 52 to the fluidic device 4, ■ a simultaneous rotation of the connecting piece 52 and the fluidic device 4 around its axis A4, in this example by an angle of 90°, so that parts 52B and 52D are oriented with regard to the nearest lateral opening formed by the chassis 2, ■ a removal of the screws fixing part 52D of the connecting piece 52 to the fluidic device 4, ■ a translation of the fluidic device 4 along its axis A4 through the corresponding opening in the front wall 3C, - Removal of the fluidic device 6, this step may include: ■ a removal of the screws fixing the fluidic device 6 to the connecting part 51, ■ a translation of the fluidic device 6 along its axis A6 through the corresponding opening in the front wall 3C, - Removal of the fluidic device 5, this step may include: ■ a removal of the screws fixing the fluidic device 5 to the connecting part 51, a translation of the fluidic device 5 along its axis A5 through the corresponding opening in the front wall 3C.

[0092] The assembly of one or more of the fluidic devices can be carried out with analogous steps performed in reverse order.

[0093] In this example, instrument 1, which has just been described, is used to calibrate a leak detection device.

[0094] To do this, the device to be calibrated can be connected to the connection end of one of the fluidic devices 4, 5 or 6, depending on the corresponding flow rate.

[0095] As an example, the fluidic devices 4 and 5 are in this example sized for a relatively large flow rate, for example between 2500 ml / min and 10000 L / h, while the fluidic device 6 is sized for a relatively small flow rate, for example between 0.2 ml / min and 20 ml / min.

[0096] Advantageously, the fluidic devices 4, 5, and 6 are reversible in this example. In the configuration described above, the first end is used as the connection end and the second end is used as the exhaust end. In an alternative configuration, the first end is used as the exhaust end and the second end is used as the connection end, independently for one or more of the fluidic devices 4, 5, and 6. The preceding description applies by analogy to this alternative configuration.

[0097] Of course, the preceding description is not exhaustive, the invention encompassing many embodiments covered by the claims.

[0098] For example, in variants not shown, instrument 1 may include one, two or more than three fluidic devices.

[0099] When instrument 1 comprises several fluidic devices, these may differ from one another. One or more of these devices may, for example, be similar to or different from device 20 illustrated in Figure 6.

[0100] The instrument may include one or more connecting parts having a geometry different from that of parts 51 and 52, depending in particular on the geometry of the fluidic device(s) that these parts are intended to maintain and / or of the available space in the internal volume of the instrument 1.

[0101] The connecting elements can include other types of elements besides screws.

[0102] As another example, the instrument of the invention can be used to calibrate or test a device that may be different from a leak detection device as defined above.

Claims

DEMANDS 1. Calibration instrument (1) for leak detection device, comprising: - an envelope (3), - one or more fluidic devices (4, 5, 6, 20) each comprising: ■ conduct (21) and ■ a pressure-reducing device (25) disposed in the conduit (21) so as to limit the flow of a fluid between a first part (21A) of the conduit and a second part (21B) of the conduit, - one or more connecting pieces (51, 52) which are configured to maintain one or more of said fluidic devices (4, 5, 6) in a so-called operating position relative to the casing (3), - one or more fastening elements configured to reversibly fix one or more of said connecting parts (51, 52) to the casing (3).

2. Instrument (1) according to claim 1, wherein one or more of said fastening members are configured to reversibly fix one or more of said fluidic devices (4, 5, 6) to one or more of said connecting parts (51, 52).

3. Instrument (1) according to claim 1 or 2, wherein one or more of said connecting parts (51, 52) comprise a part such as a sheet or plate shaped so as to present: - a first surface (S51A, S51B, S52A) configured to bear against a surface (41, 44) of at least one of said fluidic devices (4, 5, 6) and to be fixed to this fluidic device by one or more of said fixing members, - a second surface (S51C, S52B) configured to rest on a surface of the envelope (3) and to be fixed to the envelope (3) by one or more of said fixing devices.

4. Instrument (1) according to claim 3, wherein said first surface (S51A, S51B, S52A) and said second surface (S51C, S52B) of at least one of said connecting pieces (51, 52) are oblique or perpendicular to each other.

5. Instrument (1) according to claim s or 4, wherein, for at least one of said connecting pieces (52), the surface (41) of the fluidic device (4) on which said first surface (S52A) of this connecting piece (52) bears is a first surface of this fluidic device (4), this connecting piece (52) further having a third surface (S52D) configured to bear on a second surface (42) of this fluidic device (4) and to be fixed to this fluidic device (4) by one or more of said fixing members.

6. Instrument (1) according to any one of claims 3 to 5, wherein, for at least one of said connecting pieces (51), said first surface (S51A) of this connecting piece (51) is configured to bear against a first surface (44) of one of said fluidic devices (6), this connecting piece (51) having a third surface (S51B) configured to bear against a surface (44) of another of said fluidic devices (5) and to be fixed to this other fluidic device (5) by one or more of said fixing members.

7. Instrument (1) according to any one of claims 1 to 6, wherein one or more of said connecting pieces (51, 52) comprise one or more parts having a U and / or L cross-section.

8. Instrument (1) according to any one of claims 1 to 7, wherein, for one or more of said fluidic devices (4, 5, 6): - the first part of the conduit forms a first end of the fluidic device which is configured to pass through a first wall (3C) of the casing (3) when the fluidic device is in the operating position, - the second part of the conduit forms a second end of the fluidic device which is configured to pass through a second wall (3D) of the casing (3) when the fluidic device is in the operating position, said first and second ends forming respectively, preferably reversibly, a so-called connection end and an so-called exhaust end, the connection end being intended to connect the conduit to said detection device leakage, the exhaust end being intended to establish fluidic communication between the pipe and a space surrounding the instrument.

9. Instrument (1) according to any one of claims 1 to 8, in which the casing (3) is configured to house at least part of one or more of said fluidic devices (4, 5, 6) and at least part of one or more of said connecting parts (51, 52).

10. A method for dismantling an instrument (1) according to any one of claims 1 to 9, comprising the following steps: - removal of one or more of said fixing members, - displacement of at least one of said fluidic devices (4) from said position of use to another position, this displacement optionally including a simultaneous displacement of an assembly comprising this fluidic device (4) and one of the connecting parts (52) in rotation around an axis (A4) along which this fluidic device (4) extends in order to place this assembly in an angular position allowing the removal of one or more other of said fixing members.

Images