JPH025240B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device and a method for stretching ventilation conduits used when laying underground ventilation facilities or in the construction of tunnels.

Devices of this type are used either directly on the face or separate from the face, in which case further conduits are provided to reach the face.

One device known hitherto consists of a funnel and an exchangeable ventilation pipe arrangement connectable to the end of a preceding conduit, from which the ventilation conduit leads to the funnel. It is beginning to extend beyond the limits. When the face moves forward, the ventilation system is also moved and the ventilation conduit is drawn out of the pipe system located in the center of the ventilation system until the ventilation pipe system is empty. The pipe system is then separated from its front and rear connections and replaced with a filled ventilation pipe system. To complete the installation of the ventilation pipe system, the starting end of the newly installed ventilation conduit must be connected to the end of the previously used conduit. In known devices, 1
The ends of one conduit are connected to the starting end of the other conduit on the cylindrical part of the funnel which has been removed from the preceding pipe arrangement in order to install the filled pipe arrangement.

Separation of the funnel from the ventilation pipe system, retention of the remaining part and subsequent reconnection of the funnel to the pipe system to be replaced can be done manually or in the case of large diameter conduits (approximately 400-1600 mm) is done mechanically. In the case of large diameters, the weight of the funnel becomes large from a stability point of view and mechanical handling becomes essential. However, even for smaller diameter conduits that can be handled manually, funnel handling can be extremely difficult.

It is an object of the present invention to simplify the process of replacing ventilation pipe equipment in equipment of the type described above, thereby eliminating the need for mechanical means in equipment that conventionally required mechanical operation. In addition, the purpose is to make the replacement work extremely easy for devices that have conventionally been done manually.

According to the invention, a funnel, a replaceable ventilation pipe device connectable to a preceding conduit, a ventilation conduit made of bendable material, releasably attached to said pipe device and detachable via the funnel; , and a ring releasably attached to the funnel at the side of the funnel opposite the ventilation pipe arrangement, wherein the funnel is a ventilation pipe. It is fixed to the device and the diameter of the ring is approximately the same as the diameter of the ventilation conduit.

Therefore, in the device according to the invention, it is not the funnel that is separated from the ventilation pipe device;
Even in the case of large diameters, only relatively lightweight rings can be supported and handled by two people. When installing a new ventilation pipe device, it is able to hold the ends of the conduits that have already been installed, so that the conduits do not collapse and are less prone to flapping. Flapping of the ends of the conduits is best avoided if the ventilation action, which continues even when the ventilation pipe system is replaced, is particularly strong.

Preferably, a new ring is introduced into the ventilation conduit for each newly equipped pipe device, whereby this ring is inserted at the connection between the end of one ventilation conduit and the start of the next conduit. Secure it as a clamp support. By doing so, a tight connection within the ventilation conduit is obtained. In order to facilitate the clamping of the known bead at the end of the ventilation conduit onto the ring and to ensure a seal in that area, corrugations or flanges are provided on the outer periphery of the ring;
It is also possible for the bead to slide into the section or be retained beyond the section.

Therefore, when the ring remains in the ventilation conduit, both beads can be placed in close proximity to each other without being in direct contact, which often required a lot of effort. This eliminates the need to press the bead through the other bead. The preferred method of handling the device according to the invention is to leave a ring at each connection point, but by the conventional method of using a single ring and inserting one bead into the other. It is also possible to do so.

The connection of the ring to the funnel can be made by using radially displaceable bolts inserted into holes drilled in the ends of the ring and the funnel, one over the other. A bayonet joint may also be used, in which case the ring is retained by slight rotation. After the ventilation conduit has been led out from the pipe arrangement to the outer end of the ring, the junction of the ring with the funnel is exposed to the outside, so that most conceivable joining means can be used; It is even possible to use joining means that require direct manual gripping.

A secure connection of the funnel to the ventilation pipe system is extremely important for the device of the invention during the continuation of ventilation operations. but,
While filling empty ventilation pipe equipment with new conduits,
The funnel may prevent passage of the pipe as it is folded into the cylindrical space within the device. To this end, in another embodiment of the invention, the funnel can be temporarily removed during the filling operation of the pipe arrangement.
As a joining means for this purpose, for example, screw means or a plug-in connection can be used. Also,
Even after filling, the ventilation pipe system is freely accessible from the inside, so that the necessary manual operations can be carried out easily and tools can also be used, Any other joining means can also be used.

It is likewise advantageous for the junction to be accessible from the outside. This is achieved by forming the outer cylindrical casing of the ventilation pipe arrangement, usually made of a closed sheet metal cylinder, with a rod connecting the two end faces of the pipe arrangement to each other. . The disadvantage of providing such openings in the protective casing is that the pipes are exposed between the rods and can therefore be nicked or damaged. However, on the one hand, the birdcage-shaped arrangement formed by the rods is lightweight compared to ventilation pipe installations with closed sheet metal casings and, as a result,
This has the advantage of facilitating the replacement work of the ventilation pipe equipment. Therefore, it is no longer necessary to use mechanical means even in equipment that previously processed the process mechanically, and the work can be done extremely easily in equipment that previously processed the process manually. Become.

In order to overcome the drawbacks such as damage and soil contamination and to take advantage of the advantages of the birdcage ventilation pipe system, in another preferred embodiment of the invention, a flexible, stretchable protective covering is provided with a rod. covering the ventilation pipe system on the outside.
This embodiment provides advantages for ventilation pipe systems, both in the form in which the funnel is removed from the ventilation pipe system during the installation of a new pipe system, or in a permanently connected state.

Spiral-reinforced large-diameter pipes are particularly suitable as materials for protective coatings, since the helical reinforcement makes them inherently rigid and resistant to deformation. However, the axial expansion and contraction of the spirally reinforced pipe is relatively easy, so that the ventilation conduit within the pipe system can be accessed at any time by expanding or contracting it. This advantage is particularly manifested during the filling of ventilation pipe installations, when the conduits are folded in and the storage length extends to 2.5 m. In such situations, it is highly beneficial to be able to externally align an already filled conduit and press the entire length of the conduit into the pipe apparatus without damaging the conduit. Furthermore, during ventilation operations, the length of the remaining conduit can be visually determined by expanding and contracting the protective covering, and in the event of a problem with the conduit coming out of the pipe system, it can be immediately detected. , you can use your hands to loosen overfilled pipes. In normal conditions, both ends of the protective covering are fixed to the corresponding end faces of the pipe arrangement.

FIG. 1 shows a first embodiment of a device 1 according to the invention. The device has a ventilation pipe device 2 which is generally composed of an inner cylinder and an outer cylinder arranged coaxially, and a funnel 3 is fixed to one end opening side (the right end in the figure) of the ventilation pipe device 2. A ring 4 is connected to the side of the funnel 3 facing away from the ventilation pipe arrangement 2 . The function of the ring 4 will be explained in detail later.

A ventilation conduit 5 made of plastic material is inserted into the ventilation pipe arrangement 2 in a suitable manner and can be drawn out by extending from the ventilation pipe arrangement 2 to the right. 1st
In the case shown in FIG. 2, the ventilation pipe device 2 has a cylindrical shape and is mounted on a fitting 8. In the case shown in FIG. The mounting tool 8 functions as an operating tool for the ventilation pipe device 2. That is, it functions to maintain the correct position when the ventilation pipe device 2 is transferred or replaced. Funnel 3 of ventilation pipe device 2
At the opposite end, a front end wall 9 is provided, to which a blower jet nozzle or even a conventional fixed conduit (not shown) is connected. A further ventilation device with a capacity exceeding the ventilation capacity of the ventilation conduit 5 is usually fitted inside said nozzle or conduit. By doing this,
When replacing the ventilation pipe arrangement 2, it is possible to create approximately neutral ventilation conditions in the area of the replacement point, and this facilitates the replacement procedure.

In the embodiment shown in FIG. 3, the support for the ventilation pipe arrangement 2' is a suspension device 13 rather than a mounting device. The suspension device 13 then engages a respective ring 12 of a catch on the front end wall 9 and another fastener on the rear end wall. Except for this point, this embodiment is identical to that of the embodiment shown in FIG.

5a to 5d schematically show the order of replacement of the ventilation pipe device 2. FIG. At the starting point a, the bead 15 forming the beginning of the folded ventilation conduit projects beyond the ring 4 by a predetermined amount. The part can therefore be connected to a ventilation system or the like, for example. If the ventilation pipe device 2 is moved forward, ie to the left, by the length of the conduit 5 inserted into the device, the end of the conduit with the other bead 15 will touch the right edge of the ring 4. (step b). In this regard,
Bead 15 is clamped onto ring 4. This clamping action can be facilitated by providing corrugations or flanges (not shown) around the ring. This clamp positions the end of the ventilation conduit in the corrugation or flange. The place where the ring 4 connects to the funnel 3 of the ventilation pipe arrangement 2 can be accessed at this stage and the ring 4 can therefore be separated from the funnel 3 (section c.
step). Then, the newly loaded ventilation pipe device 2 is installed.

Ring 4 is a simple steel ring, its wall thickness is not particularly thick, and its width is 10~
Since it is only about 15cm, the diameter of the ring is 1600mm.
Even though it is so large, the ring 4 is extremely lightweight and can be held without any special effort. Also, since the ring has corrugations or flanges formed around the outer periphery of each of its ends, a suspension device such as a chain can be attached to the ring between the corrugations or between the flanges. Therefore, even if the ring 4 is not supported by a conventional hanging device when replacing the ventilation pipe device 2, no particular problem arises.
Even if there is a slight subsidence at the hanging point of the ventilation conduit 5, it can be lifted to the normal level.
It has been confirmed that it can be reversed at any time.

Attach the newly filled ventilation pipe device 2,
After reaching the starting position a of FIG. 5, the end of the conduit is pulled out to the free end of ring 4', i.e. to the free end of ring 4' that was previously removed, and clamped in place. . The new ring 4 of the newly supplied ventilation pipe device 2 is connected to the ventilation conduit 5 leaving the device until that ring in turn acts as a tightening support for the new connection.
It acts as a guide for.

As a variant of the method described above, the device 1 can also be used in other ways (not shown). It is not necessary to use a ring 4 for each connection point between the end of one pipe and the beginning of another pipe. In fact, the connection can be made without the aid and support of a ring. For this purpose, one bead 15 is inserted through the other and then tightened between the two beads from the outside using a wire rope. In this case, the ring 4 serves only as a guide for the ventilation conduit 5 leaving the pipe arrangement 2. The ring 4 is therefore removed with the empty ventilation pipe arrangement, and each newly installed pipe arrangement will each retain its own ring. It is particularly advantageous if the ring 4 is separated from the ventilation pipe system in the state of FIG. 5b, since it supports the end of the conduit. The ring can be separated from the end of the conduit only briefly to connect the beginning of a new conduit.

Normally, during filling of an empty ventilation pipe arrangement 2, the pipe 5 is pushed into its cylindrical space without excessive force being applied. It is therefore possible for the funnel 3 to block the passage on the corresponding side of the ventilation pipe arrangement 2. For this reason, in another embodiment of the invention, the funnel 3 can be temporarily removed during the filling of the ventilation pipe arrangement 2 with the conduit 5. The connection can be made, for example, by screws or by a bayonet engagement. It is also possible to use other connection methods, since the ventilation pipe arrangement is freely accessible from the inside even after filling, so that it can be carried out easily by ordinary manual labor.

External access is also a great advantage for connection points. This can be achieved by forming the cylindrical outer casing of the ventilation pipe arrangement, usually in the form of a continuous skin, with the rod 18 (see FIG. 6).
Sufficient clearances are provided between the rods so that the connection and separation between the ventilation pipe system 2 and the funnel 3 can be made by inserting a tool through the opening between the rods 18. Furthermore, the construction of the outer pipe casing in the form of rods 18 also has the advantage of being lightweight. Furthermore, the available amount of conduit 5 remaining in the device 2 can be determined visually at any time.

FIG. 7 shows the funnel separated from the ventilation pipe arrangement shown in FIG. 6, with the protective covering 19 located on the outside of the rod 18 partially pushed back. The protective coating 19 serves to protect the relatively delicate conduits filled within the ventilation pipe arrangement 2 . Spiral-reinforced tubular bodies are therefore perfectly suited as materials for this purpose. A diameter of sufficient diameter to securely rest on the outer surface of the rod is satisfactory; however, an excessively loose fit should not be used to facilitate handling and to avoid damage to the protective coating itself. should be avoided.

In order to prevent the protective sheathing 19 from being unintentionally stretched and exposing the folded conduit, both ends of the protective sheathing are connected to the end walls 9 and 11 of the ventilation pipe arrangement 2 and released only when necessary. It is desirable to be able to do so. This connection is made in the same way as the two ends of the conduit are connected to each other, i.e. with a fixing bead on the corresponding end wall 9 or 11 and a bead fitted at the end of the protective covering from which the sleeve is pulled out. This can be done by the following means. The protective covering 19, in conjunction with the birdcage-shaped ventilation pipe arrangement 2, combines the advantages of a lightweight and relatively easy-to-handle ventilation pipe arrangement with reliability for the storage protected by the sheet metal casing. bring.

Obviously, many variations of this invention are possible in light of the above disclosure. Therefore, within the scope of the claimed invention,
It will be appreciated that many other implementations than those described above are possible.

[Brief explanation of drawings]

1 is a schematic sectional view of a first embodiment of the device according to the invention, FIG. 2 is a rear view of the device shown in FIG. 1, and FIG. 3 is a schematic cross-sectional view of a first embodiment of the device according to the invention.
FIG. 4 is a rear view of the device shown in FIG. 3; FIG. 5 a to d are similar to FIG.
Figures 6A and B are diagrams illustrating the successive stages of replacing a ventilation pipe system;
and FIG. 7 is an isometric view of the ventilation pipe arrangement and protective covering shown in FIG. 6; 1... Device, 2... Ventilation pipe device, 3... Funnel, 4... Ring, 5... Ventilation conduit, 9, 11...
... End wall, 15 ... Bead, 18 ... Rod, 19
...protective coating.

Claims (1)

[Claims] 1. A ventilation conduit is foldably and retractably housed between an inner cylinder and an outer cylinder arranged coaxially in order to connect a preceding ventilation conduit to a next ventilation conduit via a ring. a ventilation pipe device, a funnel removably connected to the inner cylinder on one end opening side of the ventilation pipe device, and a funnel having a diameter substantially the same as the diameter when the ventilation conduit is pulled out; a ring in which the ventilation conduit is pulled out from the opening side of the ventilation pipe device through the funnel, and the tip end of the ventilation conduit is fixed to the ring of the preceding ventilation conduit, and the rear end of the ventilation conduit is Apparatus for extending a ventilation conduit, characterized in that the ring is attached to a ring fitted to a funnel and the ring is separated from the funnel. 2. Device for extending ventilation conduits according to claim 1, wherein the fixation of the funnel and the ventilation pipe device is releasable for filling the empty pipe device with the ventilation conduit. 3. The outer cylinder of the ventilation pipe device has two end walls, and the peripheral parts of the end walls are connected to each other by a plurality of rods located at predetermined intervals outside the ventilation conduit to form an outer cylinder. Device for extending a ventilation conduit according to claim 2, characterized in that the circumferential wall of the ventilation conduit is an open casing. 4. A device for extending a ventilation conduit according to claim 3, comprising a telescopic, flexible protective covering surrounding the ventilation pipe device and located outside the rod. 5. Device for extending a ventilation conduit according to claim 4, wherein the covering is configured as a spirally reinforced ventilation pipe section. 6. A device for extending a ventilation conduit according to claim 5, wherein the sheathing releasably secures each end to each of the two end walls. 7. The ventilation conduit according to claim 6, wherein the ring has a corrugated portion around the outer periphery of each end thereof, and the end of the conduit is positioned in the corrugated portion. A device for stretching. 8. Apparatus for extending a ventilation conduit according to claim 7, wherein suspension means are mounted on the ring between the corrugations, fixedly supporting the ring in position. 9. Extending a ventilation conduit according to claim 6, wherein the ring has flanges around the outer circumference of each of its ends, such that the ends of the conduit are positioned on the flanges. equipment for. 10. Apparatus for extending a ventilation conduit as claimed in claim 9, wherein suspension means are mounted on the ring between the flanges for fixedly supporting the ring in position. 11 The ring and the funnel are provided with overlapping holes, and the holes are provided with radially displaceable bolts that engage in the holes to allow the ring to be placed on the funnel. 11. A device for extending a ventilation conduit according to any one of claims 1 to 10, adapted for releasably mounting. 12. Claim 1, wherein the releasable attachment of the ring onto the funnel is effected by bayonet coupling means.
Device for extending a ventilation conduit according to any one of clauses 1 to 10. 13 In the method of extending the ventilation conduit by connecting the preceding ventilation conduit with the next ventilation conduit, the ventilation conduit is inserted between the inner cylinder and the outer cylinder of the ventilation pipe device from the open end side of both cylinders and stored in a folded state. the step of drawing out the front end of the ventilation conduit through a funnel attached to the open side of the inner cylinder and fitted therefrom so that a ring is partially exposed forward; fixing the front end of the drawn-out ventilation conduit to a preceding ring to which the rear end of the ventilation conduit is fixed via a bead; drawing out the rear end of the next ventilation conduit in the ventilation pipe arrangement; A method for extending a ventilation conduit comprising the steps of positioning and clamping on a ring fitted to a funnel, and separating this ring together with the ventilation conduit from the funnel.