EP3227055A1

EP3227055A1 - Tool for placing and removing a bleeder screw and placement and removal method

Info

Publication number: EP3227055A1
Application number: EP15817461.5A
Authority: EP
Inventors: Mohamed Zouiti
Original assignee: Electricite de France SA; Electricite Reseau Distribution France SA
Current assignee: Electricite de France SA; Enedis SA
Priority date: 2014-12-03
Filing date: 2015-12-02
Publication date: 2017-10-11
Also published as: FR3029442A1; FR3029442B1; WO2016087777A1

Abstract

The invention relates to a tool suitable for placing and removing a part (4) for sealing an opening (6). The tool comprises: -a first portion (14) suitable for being attached to a wall around the opening, -a second portion (16) suitable for engaging with said first portion (14), -grasping means (40) suitable for grasping said sealing part (4) and moving said sealing part (4) between the first and second portions (14, 16), -releasable attachment means (18) configured to tightly attach the first and second portions (14, 16) to one another, and - sealing means (20) suitable for fluidically isolating the first portion (14) from the second portion (16). The invention also relates to a part, a coupling, and a method for using same.

Description

Purge screw removal and installation tool, part, coupling and method

of use

The present invention relates to a tool for the installation and extraction of bleed screws. These screws are used in particular to close an orifice opening into a container provided with a fluid. These containers are for example cooling fluid tanks used to cool electrical transformers.

Also, in order to replace these bleed screws, for example in case of wear or in order to replace them with screws provided with sensors, it is necessary to extract them from the associated orifice that they close off.

For this purpose, a total or partial emptying of the container is generally practiced.

However, it is conceivable that this way of proceeding has the disadvantage of being long and expensive to implement and causes an interruption of operation of the container. Also, the invention improves the situation.

For this purpose, the invention relates to a tool adapted for the installation and extraction of a closure part of an orifice in a wall of a container containing a fluid, said tool being adapted to delimit a sealed volume together with the wall. In particular, the tool comprises: a first portion adapted to be fixed to said wall around the orifice, a second portion adapted to cooperate with said first portion, releasable fastening means adapted for sealing the first and second portions; to each other, gripping means adapted for gripping said shutter piece and moving said shutter piece between the first and second portions, and

shutter means adapted to fluidly isolate the first portion of the second portion.

The tool thus allows the recovery of the shutter piece of the second portion once it is disconnected from the first portion, this first portion being at the same time closed so as to prevent the flow of fluid from the container by the orifice thus opened. According to another aspect of the invention, the closure means comprise a valve arranged in the first portion, said valve being provided with a shutter adapted to close the first portion. The sealing means are thus of simple and robust bill, and allow to control in a desired way the flow through the orifice of the container. According to another aspect of the invention, the fixing means comprise a bore and a thread complementary to each other and respectively carried by one and the other of the first and second portions. Thus, the fixing and the release of the first and second portions are carried out simply and reliably.

According to one aspect of the invention, the gripping means comprise an arm received through a wall of the second portion, the arm comprising a gripping piece for gripping the closure piece. Thus, the manipulation of the shutter piece via the arm is easy.

In one embodiment, the second portion includes a purge port and a purge screw adapted to releasably seal said purge port. Thus, the tool allows to remove the air that would enter, and thus limits the risk of air entering the container.

According to another aspect of the invention, the tool further comprises fastening equipment adapted to be fixed to the wall of the container on the one hand, and to cooperate with waterproof and releasable way with the first portion on the other hand. The presence of the attachment equipment makes it easier to attach to the wall, which is particularly advantageous when it has a shape other than planar.

In a particular embodiment, the fastening equipment comprises one or more elements of the group formed by: an electromagnet sucker, an armature, an armature comprising an electromagnet sucker, a gland.

The invention also relates to a part intended to form a first portion of a tool as defined above, the part comprising a first attachment assembly for fixing the valve to the wall around the orifice, a second set releasable fastener adapted to cooperate with a second portion of said tool, and a shutter adapted to close said part.

The invention also relates to a coupling intended to form a second portion of a tool as defined above, the coupling comprising releasable fastening means adapted to seal said coupling to a first portion of said tool, the coupling comprising a wall and an arm received through said wall, the connector comprising gripping means comprising a gripping member adapted for gripping said closure piece, the gripping means being movable between a folded position in which the piece of gripping is located inside the fitting, and an extended position in which the gripping piece protrudes out of the fitting.

Furthermore, the invention relates to a method of using a tool as defined above, the tool being adapted for the installation and extraction of a closure part of an orifice formed in a wall of a container containing a fluid, the method comprising the steps of: - fixing the first portion of the tool to said wall, the tool delimiting a sealed volume together with the wall,

- Engaging the shutter piece with the gripping means, total or partial extraction of the shutter piece from the orifice of the wall,

moving the gripping part of the arm in the second portion of the tool,

delimiting a sealed space within the first portion, and

- Release of the second portion of the tool relative to the first portion of the tool.

Thus, one can proceed to the extraction of the shutter without having to empty the container.

According to a particular aspect of the invention, the method further comprises a step of delimiting the sealed space within the first portion while the second portion is not fixed to the first part. In the corresponding embodiments, the first portion is used instead of the bleed screw as flow control means through the orifice. This makes it possible to greatly facilitate the regulation of this flow and to improve its accuracy.

According to another aspect of the invention, the extraction of the closure part is a partial extraction, the closure part being left partially engaged in said orifice once said sealed space delimited.

In another embodiment, the extraction of the shutter piece is a total extraction, the shutter piece being moved into the second portion of the tool together with the gripping member.

According to another aspect of the invention, the method further comprises the steps of:

- Replacement of the shutter piece with a new shutter piece in the gripping part,

- Fixing the second portion to the first portion of the tool,

- end of delimitation of the sealed space within the first part,

moving the new shutter piece through the first portion, and - Installation of the new shutter piece in the hole of the wall.

Thus, the replacement of the shutter piece with another shutter piece is made simpler and faster to implement.

According to an advantageous aspect, the new shutter piece is an integrated sensor screw for measuring physico-chemical parameters of the fluid.

According to another aspect of the invention, the method further comprises a purge step prior to the delimitation of the first sealing space during which, by loosening and then tightening the bleed screw of the second portion, the tool is drained. gas that said tool contains and fills the fluid tool from the container. According to another aspect of the invention, the method further comprises a preliminary step of fixing a fastening equipment to the wall, the first portion then being fixed to said fastening equipment.

The invention will be better understood on reading the detailed description which follows, given solely by way of example, and with reference to the appended figures, in which: FIG. 1 illustrates a tool according to the invention;

Figures 2 to 5 illustrate a fastening equipment of a tool according to the invention;

Figure 6 illustrates a method according to the invention;

Figures 7 to 12 illustrate steps of the method of Figure 6; and

Figures 13a and 13b illustrate a variant of the tool of Figure 1.

Figure 1 illustrates a tool 2 according to the invention. The tool 2 is suitable for the installation and extraction of a closure piece 4 of an orifice 6 formed in a wall 8 of a container 10 containing a fluid 12. The closure piece 4 is for example a conventional bleed screw, or a bleed screw provided with an integrated sensor, such as for example a temperature sensor, a gas and humidity sensor, a colorimetric sensor or an electromagnetic radiation sensor.

In addition, preferably, the container 10 is a power transformer radiator, or a transformer power coolant oil box, the fluid 12 being oil.

The tool 2 comprises a first portion 14, a second portion 16 and releasable fastening means 18 for sealing the first portion 14 to the second portion 16.

The first portion 14 comprises a central passage 19, closure means 20, first fastening means 22 for fixing the first portion 14 to the wall 8, and second fastening means 24 forming part of the fastening means Releasable 18.

The first portion 14 is made from metal. The first portion 14 has a generally cylindrical shape. The central passage 19 extends along the axis of the first portion 14 and opens at one and the other end of the first portion 14. As will be described in more detail below, the central passage 19 is provided for the circulation of the fluid 12 in the first portion 14, but also for the passage of an arm that comprises the second portion.

The closure means 20 are adapted to seal the central passage 19. More specifically, as shown in the Figures, the closure means are movable between a position in which they close the central passage and a position in which they release the passage. central. Thus, they are adapted to selectively fluidically isolate the first portion of the second portion, or to fluidically connect these portions together. Thus, the closure means allow the regulation of the fluid flow 12 through the first portion 14, and the fluid isolation between the first and second portions 14, 16. The closure means 20 comprise a valve 26 comprising a lever 28 actuating a shutter 30 arranged in the central passage 19.

The first fixing means 22 are in the form of a bore 32 arranged on the internal face of the central passage 19, the bore being intended to be engaged with a complementary threading disposed on a lateral face of a projection of the wall 8 in which the orifice 6 is formed.

In addition, the second fastening means 24 are in the form of a bore 34 carried on an inner face of the central passage 19 at the end of the first portion 14 opposite the wall 8. Still with reference to the 1, the second portion 16 comprises third attachment means 36, a central chamber 38, gripping means 40 and purge means 42.

The second portion 16 is for example made from metal. The second portion 16 has a generally cylindrical shape. The second portion 16 comprises a front end adapted to cooperate with the first portion 14 and a rear wall provided with a passage 44 for the gripping means 40.

The third fastening means 36 form part of the releasable fastening means 18. The third fastening means 36 comprise a threading 46 complementary to the bore 34 carried by the first portion 14. The threading 46 is for example arranged on the outer face of the fastener. a collar 48 located at the front end of the second portion 16 and delimited by a shoulder 50 formed at the end of the second portion 16.

The central chamber 38 is delimited within the second portion 16 and is provided for movement within it gripping means 40. The gripping means 40 are adapted for gripping the shutter piece 4 and the displacement of this last between the first and second portions 14, 16 of the tool 2. The gripping means 40 comprise a gland 52, an arm 54, a lever 56 and a gripping piece 58.

The gland 52 is arranged in the passage 44 and is adapted to receive the arm in the passage 44 in a sealed manner. The arm 54 is substantially rectilinear and is received through the passage 44 via the gland 52. The arm 54 is movable in translation along the axis of the second portion 16. In addition, the arm 54 is rotatable around the axis of the second portion 16 and with respect to the gland 52.

The lever 56 is arranged at one end of the arm so as to be located outside the second portion 16. The lever 56 is in the form of a rod fixed to the end of the arm 54 substantially perpendicular to the axis of the arm 54.

The gripping member 58 is located at the end of the arm 54 opposite the lever 56. The gripping member 58 is configured to be engaged with the shutter member 4. For this purpose, the gripping member 58 comprises a cavity 60 of shape complementary to the shape of a region of the closure piece with which the gripping piece 58 is intended to cooperate. For example, if the shutter piece 4 is a screw having a screw head, the cavity 60 has a shape complementary to this screw head. The gripping piece 58, the arm 54 and the lever 56 are integral in rotation and in translation relative to the axis of the tool. Advantageously, the gripping piece 58 is magnetized, which limits the risks of falling of the closure piece 4 once it has extracted from its orifice 6 and when the latter is made from a paramagnetic or ferromagnetic metal.

The gripping means 40 are movable between a retracted position in which the gripping piece 58 is located in the central chamber 38 and abuts against or near the stuffing box 52, and an extended position in which the lever 56 is in position. abutment against the gland 52 outside the second portion 16 and the gripping piece 58 protrudes out of the second portion 16. The purge means 42 comprise a purge port 420 formed in a wall of the second portion 16, and a bleed screw 42V to be releasably received in the purge port 420. Note that in FIG. the purge means 42 have been shown as located at a low point of the second portion 16. However, advantageously, during the implementation of these purge means 42, the second portion 16 is positioned relative to the first portion 14 of the second portion 16. so that the purge means 42 are at a high point, that is to say above the axis along which the tool 2 extends.

With reference to FIGS. 2 to 5, in certain embodiments, the tool 2 also comprises an attachment device 62 adapted to allow the attachment of the first portion 14 to the wall 8. In fact, in the example of FIG. 1, the wall 8 is provided with a thread near the orifice 6, which corresponds for example to a configuration in which the closure piece 4 is coupled to a cap screwed onto the thread in question. However, other geometrical configurations are possible, in particular configurations in which the wall 8 does not have such threading.

Figure 2 illustrates a configuration in which the wall 8 is flat and does not have such threading. In this configuration, the equipment 62 is for example in the form of an electromagnet sucker 63 adapted to be fixed to the wall by magnetization. The suction cup has a central well 64 and is arranged on the wall so that this central well surrounds the orifice 6. In addition, the suction cup has a projecting collar 66 and a thread 68 arranged on the outer face of the neck 66 and complementary of the bore 32 of the fastening means 22 of the first portion 14.

Figure 3 illustrates a configuration in which the wall 8 is flat, has no threading around the orifice 6 and has anchoring points in the vicinity. In this configuration, the equipment 62 comprises for example an electromagnet sucker 63 as described above, and furthermore comprises one or more armatures 70 attached to the anchoring point (s) and configured (s) to maintain the suction cup 63 against the wall 8 by plating. The frames 70 include by example of the flanges fixed to the anchoring points via a screw and one of which is applied against a portion of the electromagnet sucker 63.

Figure 4 illustrates a configuration in which the orifice 6 is formed in a riser without threading. In this configuration, the equipment 62 is for example in the form of a gland 72 engaged on the riser. The gland includes, for example, a bolt located on the side of the base of the riser and which holds the equipment in place once screwed. In addition, the gland comprises, on its opposite end side, a thread arranged on an outer face and of complementary shape to the bore 32 of the first attachment means 22 of the first portion 14.

5 illustrates a configuration in which the wall 8 has a generally tubular shape and is threadless around the orifice 6. In this configuration, the equipment 62 comprises for example a tubular reinforcement 74 of complementary shape to that of the wall, the armature further comprising a suction cup having a central well intended to be arranged around the orifice 6. The armature 74 is for example fixed to the wall 8 by means of a screw and flanges compressing the frame 74 against the wall. Note that the suction cup is for example an electromagnet suction cup as described above, or a non magnetized suction cup. A method of using the tool 2 according to the invention will now be described with reference to Figures 6 to 12.

Initially, the shutter piece 4 is arranged in the orifice 6 of the wall 8. In addition, the first portion 14 and the second portion 16 are fixed to each other via the releasable fastening means 18, and the gripping means 40 are in the retracted position. Furthermore, the closure means do not close the central passage 19 of the first portion.

During a FIX fixing step whose result corresponds to the configuration of FIG. 1, the first portion 14 is fixed to the wall 8. To do this, depending on the configuration of the wall, fixing equipment 62 is fixed to the wall 8, and the first portion 14 is fixed to the attachment equipment 62 Alternatively, when possible, the first portion 14 is fixed directly to the wall 8. In this configuration, the tool 2 delimits within it, together with the wall, a sealed volume 76.

With reference to FIG. 7, during a MEP engaging step, the gripping piece 58 is engaged with the closure piece 4. To do this, the gripping means 40 are moved into the deployed position. In this position, the cavity 60 of the gripping member 58 cooperates with the shutter piece 4. During an extraction step EXT, the shutter part 4 is completely or partially extracted. To do this, it pivots. the lever 56 which causes the rotation of the gripping piece 58 and unscrews the shutter piece 4.

In the case of a partial extraction, the shutter piece 4 is partially unscrewed and left in the orifice 6. In the case of total extraction, the shutter piece 4 is completely unscrewed.

During a DEP moving step, the gripping piece 58 is moved into the second portion 16, that is, the gripping means are returned to the retracted position. The shutter piece 4 is brought back into the second portion 16 in the case of a total extraction. With reference to FIG. 8, during a purge step PUR, the sealed volume 76 of the gas contained therein is purged. To do this, the purge means 42 are used. More specifically, the 42V purge screw is unscrewed, which allows the fluid 12 to flow inside the volume of the tool. Once the fluid begins to flow through the purge port 420, the purge screw is screwed up. With reference to FIG. 9, during a delimitation step AND a sealed space within the first portion 14, the central passage 19 is shut off with the shutter 30. To do this, the lever 28 is actuated by the closure means 20. At the end of this step, the first portion 14 delimits within it, together with the shutter 30 and the wall 8, a sealed space 78 (Figure 10). This sealed space 78 forms an extension of the container within the first portion 14. In the case of a partial extraction of the shutter piece, the part is partly in the sealed space 78.

With reference to FIG. 10, during a release step LIB, the second portion 16 of the first portion 14 is released via the releasable fixing means 18.

At the end of this step, several scenarios are possible.

In a first case, the first portion 14 is used, for example definitively, as a flow control valve through the orifice 6. Thus, in this case, the release step is followed by a FINET control step in which the valve 26 is actuated to regulate the flow through the central passage 19, in particular to allow it, without the second portion 16 being connected to the first portion 14.

This thus makes it possible to install a valve in place of the closure part in a simple manner, without having to empty the container 10. In another case in which the object is to replace the closure part with a new part. shutter, the release step LIB is followed by a REMP replacement step during which the shutter piece 4 is extracted from the gripping member 58 and a new shutter piece 4 'is placed in the gripping piece. Advantageously, this shutter piece 4 'is a screw provided with an integrated sensor as described above, such as for example a gas sensor screw and humidity.

This screw with an integrated sensor makes it possible to measure physico-chemical parameters of the fluid 12 optimally insofar as the bleed screws are generally located at locations in which the fluid 12 circulates within the container 10, in particular when the container is part of a power transformer. With reference to FIG. 11, during a reassembly step ASS, the second portion 16 is fixed to the first portion 14 via the releasable fastening means 18, the gripping piece being provided with the new shutter piece 4 ' .

During a FINDEL delimiting end step, the shutter 30 of the shutter means 20 of the first part is opened, and the tool is purged of the air that it contains by using again the means of purge 42. Once this purge is performed and the purge orifice 420 is plugged, the gripping member 58 is moved towards the orifice 6.

Then, as illustrated in FIG. 12, the new shutter piece 4 'is installed in the orifice 6 via the gripping means 40.

At the end of this step, the tool 2 is released from the wall 8 by releasing the first portion of the wall 8.

Subsequently, if necessary, the new shutter piece 4 is connected to an acquisition device for acquiring the measurements made by the integrated sensor that it contains.

The tool and the method according to the invention have many advantages. Indeed, the tool as such allows the installation and extraction of the shutter without having to carry out an emptying of the container.

In addition, the tool is simple and reliable invoice, and is easy to handle. In addition, it allows the easy replacement of a blanking piece purge screw by a valve with a greater fineness of regulation of the flow of the fluid but also greater ease of handling.

Furthermore, via the attachment equipment, it is adaptable to different types of container wall. In addition, the arrangement of the arm in the passage of the second portion via the gland has the effect of making the sealing of the internal volume of the tool more affordable and at a lower cost. It should be noted that the tool according to the invention is particularly advantageous for the replacement of conventional bleed screws fitted to electric transformer fluid cooling means by bleed screws of substantially identical dimensions and provided with an integrated sensor.

Other embodiments are also conceivable.

In particular, an embodiment has been described above in which the gripping piece 58 is magnetized.

In a variant, advantageously, the gripping means 40 comprise a holding device 80 for holding the closure piece 4 in the gripping piece 58.

With reference to Figures 13a and 13b, the holding device 80 comprises a key 82 and a rod 84 cooperating with each other.

The key 82 is intended to be engaged with the shutter piece 4 (or 4 ') and hold it in place, as well as to release the shutter piece 4.

The key 82 includes a first end 86 located in the cavity 60. The first end 86 forms a deformable jaw configured to pass from a gripping configuration in which the jaw has a minimum gap, in particular for gripping the shutter piece , and a release configuration in which the jaw has a maximum spacing, in particular for the release of the shutter piece 4.

The key 82 further comprises a second end 88 engaged in the arm 54 and holding the key 82 in position in the arm 54.

The second end 88 comprises an end wall 90 provided with an orifice 92 receiving the rod 84. With reference to FIG. 13b, the wall 90 comprises a bore 94 oriented towards the inside of the orifice 92, the bore 94 being intended to cooperate with a complementary thread of the rod 84.

The key 82 further comprises an intermediate portion 96 joining the first end 86 and the second end 88. This intermediate portion 96 is frustoconical.

The key 82 further comprises a central passage 98 receiving the rod 84. The central passage 98 extends from the wall 90 and opens out at the intermediate portion 96.

The rod 84 is provided with an end 100 forming a pivotable actuating portion 102. This actuating portion 102 is located at the lever 56 of the arm 54.

In addition, the rod 84 is provided at its other end with a generally frustoconical head 106. The lateral surface of the head 106 is adapted to bear against the intermediate portion 96.

Finally, as previously described, the rod 84 comprises a thread 104 cooperating with the bore 94 of the key 82.

The holding device 80 operates as follows.

When the actuating portion 102 of the rod 84 is pivoted, the rod 84 moves axially due to the cooperation between the thread 104 and the bore 94.

Each direction of movement is associated with one of the configurations described above of the first end 86 of the key 82.

In a first direction of displacement corresponding to a displacement towards the left of FIG. 13a, during this axial displacement, the head 106 bears against the wall of the intermediate portion 96 and deforms it at the opening, this deformation being communicated to the first end 86. In response, the distance from the first end 86 increases. The first end 86 thus progressively passes to its release configuration.

In the second direction of displacement which corresponds to a displacement to the right of Figure 13a, the head 106 is spaced from the intermediate portion 96. The deformation of the intermediate portion 96 and the first end 86 is decreased until disappearing. The first end 86 thus passes to its gripping configuration. For the engagement and release of the shutter piece 4 or 4 ', thereby pivoting the actuating portion 102 in one direction or the other.

The presence of the holding device 80 allows optimum holding of the closure piece 4, 4 'in the cavity 60, in particular when the latter is not sensitive to the magnetization of the gripping piece 58.

Note that the walls of the cavity 60 facing the first end 86 of the key 82 have dimensions allowing deformation of the first end 86.

Claims

1. Tool adapted for the installation and extraction of a closure piece (4) of an orifice (6) formed in a wall (8) of a container (10) containing a fluid (12), said tool being adapted to delimit a sealed volume (76) together with the wall (8), the tool comprising: a first portion (14) adapted to be fixed to said wall (8) around the orifice (6),

a second portion (16) adapted to cooperate with said first portion (14),

gripping means (40) adapted for gripping said shutter piece (4) and moving the shutter piece (4) between the first and second portions (14, 16),

releasable fastening means (18) configured for sealing the first and second portions (14, 16) to one another, and

sealing means (20) adapted to fluidly isolate the first portion (14) of the second portion (16).

2. Tool according to claim 1, characterized in that the closure means (20) comprise a valve (26) arranged on the first portion, said valve (26) being provided with a shutter (30) adapted to seal the first portion (14).

3. Tool according to claim 1 or 2, characterized in that the releasable fixing means (18) comprise a bore (34) and a thread (46) complementary to each other and respectively carried by one and the other of the first and second portions (14, 16).

4. Tool according to any one of the preceding claims, characterized in that the gripping means (40) comprise an arm (54) received through a wall of the second portion (16), the arm (54) having a part gripping device (58) for gripping the closure piece (4).

5. Tool according to claim 4, characterized in that the second portion (16) comprises a through hole (44) and a gland (52) sealed inserted into said passage opening (44), the arm (54). being sealingly received in the gland (52), the gripping member (58) being rotatable and translatable relative to said gland (52).

6. Tool according to any one of the preceding claims, characterized in that the second portion (16) comprises a purge port (420) and a purge screw (42V) adapted to releasably seal said purge port (420). ).

7. Tool according to any one of the preceding claims, characterized in that it further comprises a fastening equipment (62) adapted to be fixed to the wall (8) of the container on the one hand, and to cooperate in a manner sealed and releasable with the first portion (14) on the other hand.

8. Tool according to claim 7, characterized in that the fastening equipment (62) comprises one or more elements of the group formed by: an electromagnet sucker (63), an armature (70), an armature (74) comprising a electromagnet sucker, gland (72).

9. Part designed to form a first portion of a tool according to any one of the preceding claims, the part (14) comprising first fastening means (22) for fixing the piece to the wall around the orifice second attachment means (24) adapted to cooperate with a second portion (16) of said tool, and closure means (20) adapted to close said workpiece.

10. A coupling for forming a second portion of a tool according to any one of claims 1 to 8, the connector (16) comprising releasable fastening means (36) adapted to seal said fitting to a first portion (14) of said tool, the connector comprising gripping means (40) comprising a gripping member (58) adapted for gripping said shutter piece (4), the gripping means (40) being movable between a position folded in wherein the gripping member (58) is located within the fitting (16), and an extended position in which the gripping member protrudes from the fitting (16).

11. A method of using a tool according to any one of claims 1 to 8, the tool being adapted for the installation and extraction of a closure piece (4) of an orifice (6). formed in a wall (8) of a container (10) containing a fluid (12), the method comprising the steps of: fixing (FIX) the first portion (14) of the tool to said wall (8), the tool delimiting a sealed volume (76) together with the wall,

engaging (MEP) the shutter piece (4) with the gripping means (40),

total or partial extraction (EXT) of the shutter piece (4) from the orifice (6) of the wall,

moving (DEP) a gripping piece (58) gripping means (40) in the second portion (16) of the tool,

delimiting (ET) of a sealed space (78) within the first portion (14), and

releasing (LIB) the second portion (16) of the tool (2) relative to the first portion (14) of the tool.

12. The method of claim 11, the method further comprises a step of delimiting the sealed space (FINET) within the first portion (14) while the second portion (16) is not fixed to the first piece.

13. The method of claim 11 or claim 12, wherein the extraction (EXT) of the shutter piece (4) is a partial extraction, the shutter piece (4) being left partially engaged in said orifice a once said sealed space delimited.

14. The method of claim 11 or claim 12, characterized in that the extraction of the shutter piece (4) is a total extraction, the shutter piece (4) being moved into the second portion (16) of the tool together with the gripping member (58).

The method of claim 14, the method further comprising steps of: replacing (REMP) the closure piece (4) with a new closure piece (4 ') in the gripping piece (58),

assembly (AS S) of the second portion (16) to the first portion (14) of the tool,

end of delimitation of the sealed space (FINDEL) within the first portion (14),

moving the new shutter piece (4 ') through the first portion

(14), and

- Installation of the new shutter piece (4 ') in the hole (6) of the wall (8).

16. The method of claim 15, wherein the new sealing piece (4 ') is an integrated sensor screw for measuring physico-chemical parameters of the fluid (12).

17. A method according to any one of claims 11 to 16, the method being implemented by means of a tool according to any one of claims 1 to 8, the method further comprising a prior purge step (PUR) at the delimitation of the first sealed space, and during which, by loosening and then tightening the bleed screw (42V) of the second portion (16), the tool is purged of the gas that said tool contains and the tool is filled fluid (12) from the container (10).

18. A method according to any one of claims 11 to 17, wherein, during the fixing step (FIX), fixing equipment (62) is fixed to the wall (8), the first portion (14). being then attached to said fastening equipment (62).