EP0067427A2 - Gas suction method in coal mining, and suction pipe to perform this method - Google Patents

Abstract

According to this method, performed by means of a suction pipe (2) formed by stringing together a plurality of pipe lengths (4, 5), plastic deposits are formed in some of the pipe lengths (4, 5), which plastic deposits can be activated by means of a remote control in order to foam the annular space between the suction pipe (2) and the bore-hole wall. Thus, when required, selective foaming operations are possible along the suction pipe (2) or else full foaming along a hitherto unreachable length. The plastic deposit is accommodated as a plastic-filled and propellant-gas-filled cartridge (12) in the interior of the suction pipe (2), the filling of which discharges into the annular space via a line (9) after the opening of a valve (11, 18) by means of a cable (14) run out of the bottom end of the suction pipe (2) or after the opening of a valve (18) remotely controlled by means of compressed air. The cartridge (12), including the associated valves (11, 18) and partly the lines (9), can be removed if need be from the interior of the suction pipe (2) after the foaming (Fig. 1). <IMAGE>

Description

The invention relates to a method for extracting gas in mining, in particular in coal mining, with the steps of drilling a hole in the mountains, inserting a suction pipe formed from rows of pipe sections, sealing the pipe against the bore wall at least at the end on the strut side and the Injecting liquid, foaming plastic into the annular space between the pipe and the bore wall.

This method is known for example from DE-AS 22 55 267. There it is proposed that after inserting the suction tube into the borehole and after sealing the tube against the wall of the bore on the strut side determine maximum CH 4-coverage along the well bore, to fix the exhaust pipe in this position and approximately up to the suction mouth of the suction tube to fill the annular space from the lower seal by _'injection of plastic and thus intumescent seal.

In practice, however, it has been found that the borehole loses its original shape shortly after its completion as a result of movements within the mountains and is penetrated by cracks, shearings and the like. Correspondingly, the CH ₄ yield also changes continuously, so that the location of the maximum CH ₄ yield that was initially located by measuring has migrated after a short time. The measurements previously carried out then no longer apply; strictly speaking, the position of the suction mouth of the suction pipe would have to be shifted again. For practical reasons, however, this is no longer possible if the annular space between the suction pipe and the bore wall has already been foamed.

The movements within the mountains are so strong that the flexible suction tube, usually made of plastic, is deformed. At the socket connections provided with lip seals between the individual pipe sections, the sealing can be broken, so that suction occurs at this point, which may be in an area which is to be referred to as a so-called short-circuit area. The term "short-circuit area" is to be understood as those parts of the borehole from which the longwall atmosphere emerges due to the proximity to the longwall or due to the porosity of the rock which happens to be present as soon as a negative pressure is applied there. The foaming of such leaks within a deformed suction pipe was ruled out in the previous method if the area underneath had already been partially or completely foamed.

It is therefore an object of the invention to provide a method for extracting gas in the coal industry, which is less sensitive to deformation of the borehole and thus to the suction pipe and any leakage associated therewith.

The invention is seen in the fact that a reservoir for the plastic is attached to each pipe section and that the individual reservoirs are emptied into the annular space with the aid of a remote control.

Although the method according to the invention also uses the principle of foaming the annular space between the bore wall and the suction pipe, the plastic is not filled into the annular space in one batch at a time, but instead plastic dumps are present along the suction pipe, which are activated as required for foaming can. This results in considerable advantages over previous methods. For example, For a first period of several hours, the seal in the lower area of the suction pipe against the wall of the bore is emptied accordingly by emptying the lower two reservoirs at this point. If a leak occurs later, for example in the upper area of the suction pipe, as a result of an internal movement of the mountains, the emptying of stratospheric atmosphere as a result of a short circuit can be avoided by emptying further reservoirs in the vicinity of the leak, and the leak can thus be rendered harmless. With the previous method, such post-foaming would not have been possible, since the already hardened foam plug in the lower region of the suction pipe would have blocked any access to the region above.

In addition to this selective foaming along the suction pipe, full foaming can also be carried out at the start of the suction, compared with previously known methods significantly longer foaming lengths can be achieved. So far, the foaming was possible at a maximum length of approx. 8 m, which is primarily due to the fact that the injected liquid plastic begins to foam immediately and due to its increasing solidification and thus due to the increasing friction inside and at the limits of the Annulus the expandability decreases with increasing time since the injection. With the aid of the method according to the invention, however, foaming lengths of 14-20 m can easily be achieved.

In a further development of the method, it is provided that the respective reservoir is arranged in each case in the interior of the pipe section and that the plastic is conducted to the outside via lines.

The placement of the plastic reservoirs in the interior of the suction tube has the particular advantage that each reservoir is protected from damage and so the emptying into the annular space only takes place when the corresponding remote control has been actuated. The free cross-sectional area reduced by the arrangement of the reservoir in the interior of the suction tube can be compensated for either by making the corresponding tube section in the area of the reservoir thicker-bellied or by the reservoir being torn off at a predetermined breaking point and being pulled out of the lower end of the suction tube ; in the latter procedure, however, immediate full foaming is required so that all reservoirs are removed from the suction tube when the suction begins.

To carry out the method according to claim 1, the invention proposes that one or more pipe sections are double-walled to form a reservoir filled with plastic, and that with the aid of a closure operated remotely through the pipe interior outer wall of the double tube can be opened.

The closure can e.g. cause a displacement of the outer wall relative to the inner and thus an exposure of the plastic enclosed in the annular space of the double-walled tube when the closure is actuated. Deviating from this, deliberate damage in the form of cutting or perforating the outer wall of the double-walled tube is also possible.

To carry out the further developed method with a reservoir each inside the corresponding pipe section, the invention proposes that one or more pipe sections are each provided with at least one line leading from a shut-off device of a plastic-containing cartridge to the outer wall, and that the shut-off device Cartridge consists of a remote-controlled valve.

The remote control can easily consist of a rope that extends beyond the lower end of the suction pipe and engages an actuating lever of the valve. A tensile force applied to the rope opens the valve, whereby the plastic is emptied into the adjacent annular space between the suction pipe and the bore wall. The actual emptying takes place via a propellant gas located in the cartridge, the filling of which is dimensioned such that the plastic is completely expelled from the cartridge.

If the cartridge is to be removed from the interior of the suction tube after foaming, the plastic is allowed to solidify and then another strong pull is exerted on the cable forming the remote control, which breaks the line and the rest of the line, the valve and the Cartridge formed unit can be pulled out of the lower end of the suction tube. The predetermined breaking point can be lacing can be generated at the specified point in the line. Deviating from this, the movement of the actuating lever in a first area can also open the valve and in a second area can cut through, for example, the line made of plastic as a result of a cut.

In addition to a rope as a remote control, the valve can also be designed as a compressed air valve, so that instead of the rope there is a hose connection to the valve, which can be activated by connecting a C0 ₂ cartridge or by connecting to the compressed air network, which is usually already present anyway of the valve can be applied. After the associated cartridge has been emptied into the corresponding annular space, the pressure hose also serves as a mechanical pulling device for removing the cartridge with the valve if the removal is necessary or desired.

Instead of one line, several lines can also be assigned to one valve and one cartridge so that the foaming of the adjacent annular space takes place as evenly as possible. The frequency of a pipe shot provided with a cartridge within the entire suction tube depends on the amount of plastic contained in each cartridge, the movement to be expected within the mountains and the size of the annular space to be foamed. A cartridge in every second pipe section is normally sufficient if cartridges of approx. 5 cm diameter and a length of approx. 25 cm and customary dimensions for the borehole and the suction pipe are selected. With other pipe sections of approx. 1.5 m length, there is a satisfactory foaming, but in extreme cases, a normal, i.e. inactive pipe section can also be followed by two pipe sections, each with a cartridge, ie two active pipe sections.

In a further development of the variant of the invention, in which the Remote control on a valve which can be acted upon by pressure medium, in particular a compressed air valve, is provided that a piston provided with a piston extension directed against a valve stem is arranged in the valve housing which can be inserted into a neck of the cartridge. This results in a simple construction of the unit from the cartridge and valve, and with regard to the functionality, a perfect escape of the plastic into the annular space between the suction pipe and the borehole wall is ensured.

A particular advantage of this variant of the invention can be seen in the fact that the housing part receiving the piston is provided with a circumferential shoulder arranged below the lines. This shoulder ensures a stroke limitation of the piston, thereby ensuring that the lines leading the plastic outwards cannot be closed by the stroke. At the same time, the annular space surrounding the piston extension underneath the shoulder, compared to the piston surface of the piston to be pressurized, enables the foam emerging from the valve not to retract the piston and thus not to cause the valve to close automatically.

Advantageous embodiments of this variant of the invention are specified in the further subclaims, and they find a further explanation in connection with the description of specific exemplary embodiments.

• Fig. 1 eine Querschnittsansicht durch ein Bohrloch mit einem Absaugrohr unter Verwendung der Erfindung,
• Fig. 2 eine Querschnittsansicht eines aktiven Rohrschusses gemäß der Erfindung zur Verwendung in dem Absaugrohr gemäß der Fig. 1,
• Fig. 3 eine Unteransicht des Rohrschusses gemäß der Fig. 2,
• Fig. 4 eine Ansicht gemäß der Fig. 1 zur Darstellung eines weiteren Ausführungsbeispiels der Erfindung,
• Fig. 5 eine Querschnittsansicht gemäß der Fig. 2 eines aktiven Rohrschusses zur Verwendung bei dem Ausführungsbeispiel gemäß der Fig. 4,
• Fig. 6 eine Unteransicht des Rohrschusses gemäß der Fig. 5,
• Fig. 7 eine Ansicht gemäß der Fig. 1 zur Darstellung eines dritten Ausführungsbeispiels der Erfindung,
• Fig. 8 eine Querschnittsansicht eines aktiven Rohrschusses zur Verwendung bei dem Ausführungsbeispiel gemäß der Fig. 7,
• Fig. 9 eine Querschnittsansicht eines vierten Ausführungsbeispiels als Weiterentwicklung des Ausführungsbeispiels nach Fig. 7 und 8,
• Fig. 10 eine Seitenansicht zu Fig. 9,
• Fig. 11 eine Seitenansicht einer Variante zu dem vierten Ausführungsbeispiel nach Fig. 9 und 10.

Exemplary embodiments of the invention which are illustrated in the drawing are explained in more detail below; in it mean:

• 1 is a cross-sectional view through a borehole with a suction pipe using the invention;
• 2 shows a cross-sectional view of an active pipe section according to the invention for use in the suction pipe according to FIG. 1,
• 3 is a bottom view of the pipe section according to FIG. 2,
• 4 is a view according to FIG. 1 to show a further embodiment of the invention,
• 5 shows a cross-sectional view according to FIG. 2 of an active pipe section for use in the exemplary embodiment according to FIG. 4,
• 6 is a bottom view of the pipe section according to FIG. 5,
• 7 is a view according to FIG. 1 showing a third embodiment of the invention,
• 8 shows a cross-sectional view of an active pipe section for use in the exemplary embodiment according to FIG. 7,
• 9 shows a cross-sectional view of a fourth exemplary embodiment as a further development of the exemplary embodiment according to FIGS. 7 and 8,
• 10 is a side view of FIG. 9,
• 11 is a side view of a variant to the fourth exemplary embodiment according to FIGS. 9 and 10.

1 shows a first exemplary embodiment of the invention. Arranged within a borehole 1 is a suction pipe 2, which is sealed externally with respect to the borehole 1 against the strut at its lower end by means of a sealing plug 3, for example made of polyurethane. The same sealing plug 3 is located just before the suction mouth of the suction pipe. It is composed alternately of active pipe sections 4 and inactive pipe sections 5, sleeves with lip seals being provided at the respective transition points.

An active pipe section is to be understood as one with a plastic reservoir, in contrast to an inactive pipe section 5, which corresponds to previously known pipe sections. In the exemplary embodiment according to FIG. 1, the active pipe sections 4 are enlarged in diameter in their central region, so that the plastic reservoir can be accommodated therein without hindering the free passage cross section, which e.g. is predetermined by the inactive pipe sections 5.

A widened section of an active pipe section 4 is shown in FIG. 2. A line 9 is attached within a wall 8 by means of collar bushings 10, which is connected to a valve 11 designed as a rotary ball valve. The valve 11 is followed by a cartridge 12 filled with a propellant gas and a liquid plastic suitable for foaming, for example polyurethane, which is arranged coaxially to the longitudinal axis of the active pipe section 4. The valve 11 is provided with an actuating lever 13 on which a cable 14 engages. The rope 14 extends through the entire suction pipe 2 and protrudes from its lower end so far that it is comfortable can be gripped.

As soon as the foaming of the annular space in the vicinity of a certain active pipe section 4 is desired, the cable 14 is pulled, whereby the valve 11 is opened. The propellant gas inside the cartridge 12 empties the plastic via line 9 into the corresponding annular space, with pre-foaming in line 9 and final foaming outside the line into the annular space.

FIG. 3 shows a view of the widened area of the active pipe section 4 according to FIG. 1. The line 9, which is designed as a T-piece, can be clearly seen within the outer wall 8. The valve arranged above and the cartridge 12 attached to it is schematically indicated as a circle.

Should e.g. If the annular space is foamed between the two sealing plugs 3 in the arrangement according to FIG. 1, all three ropes 14 are pulled simultaneously or at short intervals, whereby the plastic pours out of the respective cartridges 12 into the corresponding annular space. A selective foaming can take place by the targeted actuation of the ropes 14, which are either color-distinguishable or provided with a number to indicate their belonging to the individual valves 11.

In the exemplary embodiment according to FIG. 4, the valve 11 and the cartridge 12 are not arranged coaxially to the longitudinal axis of the active pipe section 4, but rather eccentrically. The line 9 is not designed as a T-piece, but as a pure angle piece; there is also only a single opening into the annular space per valve 11 or per cartridge 12. Otherwise, FIGS. 1 and 4, 2 and 5 and 3 and 6 correspond, so that with regard to the explanation of the preceding description the corresponding figures can be referenced.

The embodiment of the invention shown in FIG. 7, however, differs significantly from the two previously described. It can be seen that the active pipe sections 4 have no widening, that is to say correspond to the inactive pipe sections 5 with regard to their diameter. Nevertheless, they are provided with cartridges 12 (FIG. 8), which would seriously impede the free passage cross section in the position shown. For this reason, the cartridges and the valves must be removed from the interior of the suction pipe 2 after foaming.

But first another variant is described. Instead of a rotary ball valve, a compressed air valve 18 is provided in this exemplary embodiment, the locking member of which is displaced by the piston of a small pneumatic cylinder. To actuate it, a compressed air supply in the form of a hose 19 is required, which is guided through the interior of the suction pipe 2 instead of the cables 14. For activation, the hose 19 is connected to a pressure source, whereupon the propellant gas in the cartridge 12 pre-foams the plastic and drives it out of the outer wall 8 on both sides through the line 9.

Since only a very low pressure is required to actuate the valve piston, the connection is sufficient, for example, to a C0 ₂ cartridge with the aid of an appropriate device, as is known, for example, from siphons and the like. Of course, the compressed air supply that is usually present can also be tapped and used to actuate the compressed air valve 18.

After the foaming of the annular space around the outer wall 8, the compressed air valve 18 and the cartridge 12 be removed from the interior of the suction pipe 2 so that a usable free passage cross section is available. The line 9 is therefore weakened with respect to the diameter at the transition point to the mouth on the outer wall 8 at the points indicated by arrows, as a result of which a predetermined breaking point is present here. By applying an energetic tensile force to the hose 19, this predetermined breaking point tears, as a result of which the unit formed from the line residues, the compressed air valve 18 and the cartridge 12 is detached from the outer wall 8 and can be pulled out of the lower end of the exhaust pipe.

_S elbstverständlich ^l is a predetermined breaking point with the embodiments according to FIGS. 2 and 5 also possible in connection with a cable 14. A predetermined breaking point can be present even if the active pipe section 4 has a thickening in the area of the plastic reservoir. It is in fact always possible that a rock falls approximately into the suction mouth of the suction pipe 2 from the inner diameter of the inactive pipe sections 5, which would not fall through the suction pipe 2 without removal, in particular the cartridges 12. In these cases, the general arrangement of a predetermined breaking point is recommended, so that the obstacle for any rocks of larger diameter that may have fallen into the suction pipe can be removed.

When the suction pipe 2 has reached its later desired position, the upper sealing plug 3 already has a considerable friction path from the beginning of the borehole 1 to its later position. The wear is correspondingly strong, so that there is a fear of impairing its sealing effect. For this reason, the pipe section, which carries the upper sealing plug 3, should always be followed by an active pipe section 4, so that the possibly reduced sealing effect by foaming the underneath lying area can be compensated. As a rule, the condition of the upper sealing plug 3 is still so good that the pressing plastic from the foaming process penetrates directly underneath between the sealing plug 3 and the borehole 1, but not into the suction mouth of the suction pipe 2. In this way it is ensured that unintentionally no foam gets into the suction mouth through the foaming in the upper area of the suction pipe 2.

The third exemplary embodiment (FIGS. 7 and 8) is further developed by the fourth exemplary embodiment according to FIGS. 9 and 10. Here, as can be seen in particular from the sectional drawing in FIG. 9, the cartridge 12 has at its lower end a neck 20 which has a tapered cross section compared to the other cartridge cross section. A valve housing 21 of the valve 18 which receives the triggering mechanism of the remote control is provided at the lower end with a shoulder 22 which can be inserted into the neck 20 and which has a circumferential groove 24 equipped with a sealing ring 22 for better hold and better sealing within the neck 20. The valve housing 21 is formed as a unit in the exemplary embodiment shown in the drawings.

However, it is also conceivable to connect the valve housing 21 with a screw closure that can be attached to the cartridge 12. The cartridge 12 connected to the valve housing 21 is fastened via the lines 9 in the wall 8 of an active pipe section 4. In the exemplary embodiments shown (also in FIG. 11), the lines 9 are designed as axially pierced screws 25, the screw heads 26 being attached to the outside of the wall 8. In addition, a sealing element 27 is provided between the screw heads 26 and the wall 8. The lines 9 are provided with predetermined breaking points 28. Within the valve housing 21, a piston 29 is attached orders, which is equipped on the top with a valve stem 17 opposite the piston extension 30 for actuation smaller cross-section. To limit the piston stroke, the housing part 31 is provided with a circumferential shoulder 32 below the lines 9.

A connection piece 33 is arranged on the valve housing 21, to which the pressure medium line, which can be designed as a hose 19 and can be acted upon by compressed air, is connected by means of a quick-release fastener 34. The quick-release fastener 34 makes it possible to produce a fast connection between the pressure medium line and the valve housing 21 which can be subjected to tensile stress, which is important for the recovery of the cartridge 12 from the cased borehole. In order to be able to constantly reuse the pressure medium line, it is advantageous to produce it from an elongation-free plastic with or without reinforcement.

In order to ensure the outflow of the plastic from the cartridge 12, the piston extension 30 is wedge-shaped at its upper end. Furthermore, the screw heads 26 arranged on the outside of the piping are provided with check valves, for example with rubber membranes, in order to prevent the pressed-out plastic from reentering the inside of the piping. In order to avoid tearing off the valve housing 21 inserted into the neck 8 of the cartridge 12 when the cartridge 12 is recovered from the borehole, an additional holder 35 is provided between the valve housing 21 and the cartridge 12. On the circumference of the valve housing 21 there are two fastening elements 36, in the exemplary embodiment shown in FIG. 10, a screw extension, onto which a nut can be screwed, for fastening a holder 35, for example a metallic or plastic flat band, which is around the cartridge 12 is guided around.

When installing the piping, it can happen that the wall 8 receiving the cartridge 12 is deformed within the borehole and is reduced in cross section. As a result, the lines 9 carrying the cartridge 12 or the valve housing 21 shear off prematurely in the region of the predetermined breaking points 28. In the worst case, the subsequent foaming can become a borehole closure. This danger is avoided in the exemplary embodiment of the invention shown in FIG. 11. The valve housing 21 connected to the cartridge 12 is arranged fastened to the wall 8 ′ via only one line 9, similar to the second exemplary embodiment according to FIGS. 5 and 6. The screw head 26 is arranged in a recess in the wall 8 and on the inside the wall 8, a lock nut 37 is arranged to stabilize the line 9. In this way, premature destruction of the lines 9 is prevented in the event of transverse deformations of the piping or changes in cross-section of the wall 8 of the pipe sections 4.

Claims (29)

1. A method for extracting gas in mining, in particular in coal mining, with the steps of drilling a hole in the mountains, inserting a suction tube formed from rows of tube sections, sealing the tube against the bore wall at least at the end of the face and injecting liquid , foaming plastic in the annular space between the tube and the bore wall, characterized in that a reservoir for the plastic is attached to each tube section and that the individual reservoirs are emptied into the annular space with the aid of a remote control. 2. The method according to claim 1, characterized in that the respective reservoir is arranged in the interior of the respective pipe section and the plastic is conducted via lines to the outside.
Method according to claim 2, characterized in that each reservoir is connected to the respective pipe section via a predetermined breaking point, and that after the reservoir has been emptied and after the plastic has solidified, the reservoir is torn off the pipe section and pulled out of the suction pipe. 4. Suction tube for performing the method according to An saying 2, consisting of several pipe sections, characterized in that one or more pipe sections (4) are each provided with at least one line (9) leading from a shut-off element of a plastic-containing cartridge (12) to the outer wall (8) and that the shut-off device of the cartridge (12) consists of a remote-controlled valve (11, 18). 5. Suction pipe according to claim 4, characterized in that the remote control consists of a rope (14) for an actuating lever arranged on the valve (13), the free end of which extends beyond the lower end of the suction pipe (2). , 6. Suction pipe according to claim 4, characterized in that the remote control consists of a compressed air hose (19) for an actuating cylinder arranged on the valve (18). 7. Suction pipe according to one of claims 4-6, characterized in that each line (9) is provided with two or even more orifices on the outer wall (8). 8. suction pipe according to one of the preceding claims 4-7 and for performing the method according to claim 3, characterized in that a predetermined breaking point is arranged at the transition point from the line (9) to the respective mouth on the outer wall (8). 9. Suction tube according to one of claims 4-7, characterized in that each tube section (4) containing a cartridge (12) is enlarged in diameter at least in the area of the cartridge (12) by a cross-sectional area which corresponds to the cross-sectional area of the cartridge (12 ) corresponds. 10. Suction tube according to one of the preceding claims 4-9, characterized in that the cartridge (12) is arranged with its longitudinal axis parallel to the longitudinal axis of the respective pipe section (4) and coaxially or in the immediate vicinity of the wall. 11. Suction pipe according to one of the preceding claims 4 - 10, characterized in that the valve is designed as a rotary ball valve (11). 12. Suction tube according to one of the preceding claims 4-11, characterized in that each tube section (4) containing a cartridge (12) is approximately 50 cm long. 13. Suction pipe according to one of the preceding claims 4-12, characterized in that every second pipe section (4) is provided with a cartridge (12). 14. Suction pipe according to one of the preceding claims 4-13, characterized in that the line (9) consists of a plastic. 15. Suction pipe for performing the method according to claim 1, consisting of several pipe sections, characterized in that one or more pipe sections are double-walled to form a plastic-filled reservoir, and that with the help of a remote-operated by the tube interior closure, the outer wall of the double tube can be opened. 16. Suction pipe according to claim 15, characterized in that the outer wall is designed to be displaceable relative to the inner to form the opening. 17. Suction pipe according to claim 15, characterized in that the closure contains a device for cutting or punching the outer wall. 18. Suction pipe according to one or more of the preceding claims 6-17, characterized in that in the in a neck (8) of the cartridge (12) insertable valve housing (21) of the valve (18) one with a against a valve stem (17th ) directed piston extension (30) provided piston (29) is arranged. 19. Suction tube according to claim 18, characterized in that the piston extension (30) is wedge-shaped at its upper end directed against the valve stem (17). 20. Suction pipe according to claim 18, characterized in that the piston (29) receiving the housing part (31) is provided with a circumferential shoulder (32) arranged below the lines (9). 21. Suction pipe according to claim 18, characterized in that on the valve housing (21) with a pressure medium line, for example a hose (19) by means of a quick connector (34) connectable connecting piece (33) is arranged. 22. Suction pipe according to claim 18, characterized in that the lines (9) are designed as axially pierced screws (25) and the screw heads (26) are arranged outside the wall (8). 23. Suction pipe according to claims 18 and 22, characterized in that the screw heads (26) are provided with check valves, for example rubber membranes. 24. Suction tube according to claim 18, characterized in that the valve housing (21) connected to the cartridge (12) is fastened to the annular space on the wall (8) by means of a line (9). 25. Suction pipe according to claims 18 and 24, characterized in that the screw head (26) is arranged embedded in a recess in the wall (8). 26. Suction pipe according to claims 24 and 25, characterized in that the line (9) on the inside of the wall (8) is provided with a lock nut (37). 27. Suction pipe according to claim 18, characterized in that the valve housing (21) has a cylindrical shoulder (22) which can be inserted into the neck (20) and which has a circumferential groove (24) and a sealing ring (24) arranged in the groove (24). 23) is provided. 28. Suction pipe according to claim 18, characterized in that the valve housing (21) has two opposing fastening elements (36) for fastening a holder (35) which can be inserted in the longitudinal direction around the cartridge (12). 29. Suction tube according to claims 18 and 25, characterized in that the holder (35) is designed as a flat band made of metal or plastic around the cartridge (12). 30. Suction pipe according to claim 18, characterized in that the pressure medium line is designed as a reusable, elongation-free hose (19) made of plastic with and / or reinforcement.

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