JPH0510443B2 - - Google Patents

Abstract

The invention relates to a method of placing and connecting diaphragms in trench walls. To this end, inner and outer slit connecting tubes are to be attached to the perpendicular diaphragm boundaries. The slit connecting tubes are telescoped when the diaphragms are put into the trench-wall section. The inner space of the connecting tubes is then emptied. Devices for cutting, cleaning and connecting the overlapping diaphragm ends are then subsequently moved in the inner space of the connecting tubes so that a permanent, continuous and tight connection of the perpendicular diaphragm boundaries in the trench wall is produced as a result.

Description

TECHNICAL FIELD The invention relates to a method for inserting and bonding a membrane to a slit wall according to the preamble of claim 1, and to a device for carrying out this method.

BACKGROUND OF THE INVENTION Slit walls are usually installed underground as vertical sealing means to prevent leakage of underground water or water during underground construction or water conservancy construction, or to prevent leakage in garbage dumps and the like. The formation of slit walls, installed at depths of 30 m or more, is carried out from the surface by scraping, cleaning and dredging vertical slit-like voids. The slit-like voids are filled with a thixotropic suspension to prevent collapse. In so-called one-stage systems, a medium is added to the support liquid, such as cement and/or other binders, so that the support liquid can remain as material for the slit walls. In a two-stage system, the supporting liquid is displaced and replaced by the final material of the slit wall, such as concrete, by filling the remaining material from below upwards. As is well known, the slit wall may be formed by continuously forming slits or by the Bilger method depending on the geological conditions and depth.
fahren) is finished with a first layer and a second layer.

In order to increase the liquid tightness of the slit walls, liquid-tight membranes and/or multilayer membranes are inserted into the slits.
Multilayer membranes consist of at least one permeable layer and a liquid-tight layer, the permeable layer draining the invading liquid and thus creating a "hydraulic fall" for leaking water and the diffusion medium. ). Various solutions have been attempted for inserting such membranes into the slit walls and for bonding the membranes together.

For example, European Patent Publication (EP-OS) No.
No. 0074686 discloses a method of inserting a variable packing membrane and a method of joining the lamina by superimposing tracks or by injecting a hardening substance into the area of the vertical lamina joining. is being featured. Further, German Patent Publication No. 2549466 discloses a method for inserting an elastic packing membrane in the Birger method, but in this method,
Cleaning is required to join the ends of the flakes, and the hollow space for forming this joint is unstable.

European Patent No. 2,345,983 discloses a method for removing the thin film from a vertical box.
In this case, the box must be moved within the sealing wall by means of a supporting liquid, and for technical reasons the range of application is limited to slits several meters deep.

Furthermore, European Patent Publication No. 0086001,
As a supplement to the first-mentioned patent publication, it discloses a method for joining the ends of the lamina when inserting the lamina.

However, all previously known solutions do not take into account the problems associated with the formation of slit walls with a depth of more than 5 m. When forming thin layers of slit walls, the layers must be inserted with sufficient overlapping length, and care must be taken when excavating the next layer to avoid damage due to melting, scraping, or dredging. It won't happen. Also, after inserting the membrane into the adjacent slit wall, the two membranes must be firmly connected by welding, gluing, etc.

Purpose The present invention provides an insertion method suitable for a slit wall and a method for securely bonding a membrane in order to seal the slit wall by additionally inserting a membrane,
A further object is to provide an apparatus for carrying out this method.

Structure, operation and effect The above object is achieved according to the invention by the features of claim 1 with respect to the method, and with the features of claim 10 or 23 with respect to the apparatus. Alternatively, it is achieved by Clause 26 or Clause 43.

At the vertical edge of the membrane section, which has a width somewhat greater than the slit wall section, a connecting tube provided with a slit is firmly and fluid-tightly attached, so that when the membrane is inserted into the slit wall section, The inner feed tubes of adjacent membrane sections are inserted into the outer coupling tubes. The outer diameter of the outer coupling tube is smaller than the thickness of the slit wall.
Further, the outer diameter of the inner coupling tube is smaller than the inner diameter of the outer coupling tube. The inner diameter of the inner connecting tube is such that the cleaning device and the device for connecting both the connecting tubes at the adhesive surface,
It is sized such that it can be used to vertically lower the interior space of the coupling tube. The method according to the invention has advantages over previously known methods. This is because it can be applied to any method of forming slit walls and to any shape of the slit walls. The invention makes it possible to bond membrane parts to each other in a fluid-tight and controllable manner by gluing, welding and other bonding methods under defined conditions. The method according to the invention is suitable both for the formation of slit walls in a one-stage system and also for the formation of slit walls in a two-stage system using a supporting liquid as a suitable residual slit wall material. ing.

With the device according to the invention as claimed in claim 23, the protruding part of the welding profile that projects into the longitudinal slit of the inner coupling tube can be deflected by means of a deformation relative to the outer coupling tube. It becomes possible to press it. The projecting part of the welding profile is first heated by means of a heating device to the temperature required for welding. During the next movement of the device, the deformation is forced outwardly of this heated protruding part of the welding profile against the outer coupling tube. The pressing device presses the outwardly curved portion of the welding profile part into a firm and fluid-tight connection with the outer coupling tube. The deformation is adjusted from the working position to the rest position in such a way that the deformation does not come into contact with the protruding parts of the welding profile when the fitting is introduced into the fitting tube. This ensures that the welding profile is not damaged when the device is lowered into the coupling tube.

In the device according to the invention as claimed in claim 43, the welding wire is fed by means of a guide to a crushing section which continuously breaks the welding wire into pieces.
The shredded welding wire is melted in a subsequent heating section, and the resulting melted welding material flows out of the outlet of the welding shoe. Welding material is fed into the welding area, so that the two connecting tubes are continuously connected to one another in a fluid-tight manner during lifting of the device according to the invention. Since the weldable material is provided as a welding wire, the welding material can be moved from the outer area of the coupling tube to the extruder with the aid of a guide, resulting in a continuous supply of welding material. I can do it.

Embodiments Next, some embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 8 show step by step the process of forming the slit wall and sealing with the membrane.
The Roman numerals in the figure indicate the thin layers of the slit wall, and the Arabic numerals indicate the stages of formation of the slit wall. Using a slit wall forming gripper, scraper, or hydraulic device, the slit and wall portion are dug in a predetermined direction to the required depth. The slit is filled with a suspension 2 inside the edge 1 of the slit wall. The suspension 2 must have the function of a supporting liquid so that the slit does not collapse due to groundwater or earth pressure. In one-stage systems, a hardening medium is added to this support liquid, for example cement and water glass, hardening substances, so that the suspension 2, after hardening, assumes the function of the final material of the slit wall. Also plays a role.

Once the slit wall has been excavated to a predetermined depth, the membrane parts 3, 1 are inserted into the slit wall. Membrane part 3,
1 is the length equivalent to the depth of the slit wall portion.
At the vertical edges of the membrane parts 3, 1, in the direction of advancement of the slit wall, an outer coupling tube 4 is firmly and fluid-tightly attached. The inner coupling tube 6 is then firmly and liquid-tightly attached to the opposite vertical edge of the membrane parts 3,1. The width of the membranes 3, 1 is at least equal to or greater than the width of the slit wall portion. The interior of the outer coupling tube 4 is filled with suspension 2 during installation into the slit of the membrane part 3,1.

In the next slit wall forming process, the next slit wall section is formed along the outer coupling tube 4.

In steps 1, 4 and 2 of the method according to the invention,
The membrane parts 3, 2 are inserted into the slit wall parts. In this case, the inner coupling tube 6 of the membrane parts 3, 2
is inserted into the outer connecting tube 4 of the membrane part 3,1.
In this case, in a one-stage system, the suspension 2 is
is entered. Said interior 5 by inserting a membrane
An embodiment of the method for preventing the suspension 2 from entering is explained in detail in FIG.

FIG. 5 illustrates the process of cleaning and emptying the interior 5 of the outer coupling tube 4. Cleaning of the interior 5 is advantageously carried out using nozzles and nozzle spears.
This is done by injecting a high-pressure flow into the interior 5 of the coupling tubes 4 and 6 using a . The process of emptying the interior 5 is carried out by introducing a pump and sucking in cleaning liquid. Simultaneously with the cleaning of the interior 5, the formation of the third slit wall can take place (step 1).

In step 6, the coupling process and cleaning of the coupling tube is carried out, for example by vertically lowering the interior space 5 using a suitable device which will be explained in more detail below. The result of this step 6 is a robust and liquid-tight connection 7 of the connecting tubes 4 and 6. This ensures that the membrane parts are successfully connected to each other.

In step 7, the sealing property (liquid tightness) of the joint part 7 is
is controlled. For this purpose, fittings (not shown) are attached to the coupling tubes 4 and 5 in a fluid-tight and druck-fest manner, and the inner space 5
is filled with compressed air or compressed liquid and pressure is measured through a predetermined space.
The sealing performance of the product is verified.

Next staircase. At 8, the interior space 5 is filled with a suitable material that is to become the final material of the slit wall or is mineral-based or plastic. This poured body 8
It serves as a seal to prevent the ingress of undesirable substances and to protect the robust bond.

When applying a two-stage system to form slit walls, one begins by replacing the pure support liquid for the final slit wall material remaining in stage 2.

Internal space 5 by installing a hose-like membrane
protection is offered as an advantageous solution in two-stage systems.

If no suspension liquid reaches the interior spaces 5 of the connecting tubes 4 and 6, the support liquid for the remaining slit wall material 28 can be replaced in step 6. This variant has the advantage that the support liquid 2 does not harden in the interior space 5 of the coupling tubes 4 and 6 until the coupling tubes 4 and 6 are coupled together.

FIG. 9 shows an embodiment of the coupling tubes 4 and 6. The outer coupling tube 4 has a continuous seam 24.
1 is firmly and fluid-tightly connected to the membrane part 3,1. In an advantageous embodiment, the membranes 3, 1 and the connecting tubes 4, 6 consist of a liquid-impermeable, high or low density plastic, for example polyvinyl chloride, polypropylene, polyethylene or the like. The membrane material is usually a thermoplastic elastomer based on natural or synthetic rubber, which has a high diffusion resistance. In the embodiment of FIG. 9, the membrane 3,1 is welded to the coupling tube 4, so that the seam 24,1 is a continuous plastic weld seam. However, the connection can also be effected by hot wedges, hot air or extrusion welding, or by gluing, melt welding. According to another advantageous embodiment, the coupling tubes 4 and 6 can be made of metal, for example of weldable, rust-free steel with a plastic base coated with a corrosion protection layer.

The outer diameter of the inner coupling tube 6 is smaller than the inner diameter of the outer coupling tube 4, so that the inner coupling tube 6 can be inserted into the outer coupling tube 4. Inner joint pipe 6
The membrane portion 3, by means of a continuous seam 24,2
It is combined with 2. The outer coupling tube 4 and the inner coupling tube 6 are coupled at contact surfaces 38 and 39.
The coupling tubes 4 and 6 each have a slit in the vertical direction, and the width of the slit in the outer coupling tube 4 is greater than the thickness of the membranes 3, 2, or the slit is formed by inserting a slit into the membranes 3, 2 through a suitable device. It is set in. While inserting the inner coupling tube 4 into the outer coupling tube 6, the vertical slit edge of the outer coupling tube 4 is inserted into the membrane 3, 2 to the extent that the membranes 3, 2 can be inserted therethrough, and after the membranes 3, 2 have been inserted. The slit can be elastically expanded to such an extent that it comes into close contact with 2.

FIG. 10 shows an example of a device for welding both coupling tubes 4 and 6. The welding machine 9 is located inside the inner coupling tube 6 and runs vertically in the interior space 5 from below to above over the entire length of the coupling. Welding machine 9
In the example shown, it has a frame 37 for receiving the spring part 16. On the frame 37 are press wheels 15.1, 15.2 for mounting two wedge-shaped heating plates 10.1 and 10.2, which are inserted between the contact surfaces 38 and 39 of the coupling tubes 4 and 6.
The shafts 2 and 17 are fixed. Heating plate 10.1
and 10.2 are electrically heated via heating wires 21 and connected via connections 18 to the electrical cables of the power supply unit. The fixing of the heating plates 10.1, 10.2 to the frame 37 of the welding machine takes place between the edges 11 of the inner coupling tube 6. In the illustrated embodiment of the welding machine, a cleaning device for cleaning the contact surfaces 38 and 39 is arranged integrally in the welding machine. A stream of water and/or air is supplied by the nozzle 13 to the area of the contact surfaces 38 and 39. The supply of water and/or air, which is preferably heated, takes place via the supply pipe 19 of the supply unit, which is outside the interior space 5 of the coupling pipe 4.

A press wheel, which is indicated by diagonal lines in FIG. .2 is fixed to the frame 37 below the press wheels 15.1 and 15.2.

Although not shown, several attachments are provided for gluing, hot air welding, extrusion welding, or melt welding, which are secured to the frame 37 using support wheels as described below. be able to. Examples of devices of this type will be described in detail below.

The device for cleaning the contact surfaces can also be installed separately and configured to move up and down the internal space 5 of the coupling tubes 4 and 6, and does not need to be directly fixed to the welding machine as described above.

FIG. 11 is a schematic cross-sectional view of the coupling tubes 4 and 6. In the interior space 5 of the coupling tubes 4 and 6, a hose-like membrane 22 is supported via a liquid fill 23 against the inner edge of the coupling tube, thus preventing the ingress of suspension. Although not shown, as another application example of the hose-shaped membrane 22, a membrane supported by this liquid may be used.
The outer coupling tube 4 is inserted until the inner coupling tube 6 is inserted.
can be inserted into the . For this purpose, the hose-like membrane is pulled out or the inner connecting tube 6
The load is reduced to such an extent that it can be inserted into the outer coupling tube 4.

FIG. 12 shows another example of connecting the connecting tubes 4 and 6.
Give an example. . The inner coupling tube 6 is pressed against the outer coupling tube 4 at the contact surfaces 38, 39 by the membrane 22, which is hose-like in the interior space 5 of the coupling tubes 4 and 6. In this case, compressed air or compressed liquid 23 is injected into the hose-shaped membrane 22. In the area of the contact surfaces 38 and 39, at least one surface of the coupling tubes 4 and 6 is provided with a known glow cord 25;
The glow cord 25 is spark-adjusted to plasticize the surrounding area of the plastic material, thus producing a weld 26 of the connecting tubes 4 and 6 at the contact surfaces 38 and 39.

FIG. 13 shows another example of the structure of the external coupling tube 4. This configuration example can basically be applied to the inner coupling pipe 6 as well. The outer coupling tube 4 made of plastic is reinforced by a thin cylindrical reinforcement 27, especially made of steel. The steel of the cylindrical reinforcing section 27 consists of particularly highly elastic spring steel. The cylindrical reinforcement 27 is completely embedded in the plastic of the outer coupling tube 4, so that corrosion problems do not arise.

FIG. 14 shows an example of installing a slit wall in a two-stage system. A jacket tube 29 is provided between two adjacent slot wall sections and is provided with a recess 33 for receiving the outer coupling tube 4. The inner space of the outer coupling tube 4 is filled with a non-hardening support liquid 2.3, similar to the inner space of the outer jacket tube.
and 2.2 are filled. The support liquid 2 in the slit wall section has already been replaced by the remaining hardened slit wall material 28. After the remaining slit wall material 28 has begun to harden, the jacket tube 33 is withdrawn and the membrane 3.2 is installed together with the inner coupling tube 6 into the outer coupling tube 4. The subsequent formation process of the membrane bonding portion is carried out in the same manner as described in connection with FIGS. 5-8.

FIG. 15 is a schematic longitudinal section through the membrane 3.2 during the insertion process. In this example, the outer coupling tube 4 is not provided with a slit but is perforated. The perforation 30 allows the blade-like device 3 to be inserted when the inner coupling tube 6 is inserted.
1 into successive slits. A blade-like device 31 is attached to the underside of the membrane 3.2 in the area of the connection location 24.2.

16 and 17 show an example of a protection device for the slit of the outer coupling tube 4. FIG. The protection device consists of a tensile profile part 32 which surrounds the edge of the outer coupling tube 4, usually with a slit. The profile part 32 is made of metal or plastic and protects the slit from damage and/or provides additional stability to the outer coupling tube 4 during insertion into the slit wall.

FIG. 18 shows an example of a device according to the invention using a multilayer film. In the illustrated example, the multilayer membrane consists of a drain layer 42, a filter fiber layer 43, and a liquid-tight foil 44. At the joint positions 24.1, 24.2 between the multilayer membranes 3.1, 3.2 and the coupling pipes 4, 6, holes are formed between the drain layer 42 and the internal space 5 of the coupling pipes 4, 6. An opening 41 is formed. The internal space 5 of the connecting pipes 4 and 6 can be provided with an underground water pump 40 for discharging leakage water. If the liquid level is low in the drain layer, the drain layer acts as a "hydraulic pit" for leaking water and scattered gases, so that further leakage of the slit wall is prevented. The underground water pump 40 can be provided temporarily or every 5 or 10 connecting pipes 4, 6. In the latter case, the interior space 5 of the other coupling tube is used as a space through which flow can occur up to the next inhalation device. Furthermore, a water level gauge or sampler for determining the water level can be connected to the connecting pipe 4.
It can be provided in the internal space 5 of and 6.

FIG. 19 is a plan view of several slit wall sections when forming the slit wall using the Birger method. First, primary thin layers 34 and 35 are formed. The membranes 3.1 and 3.3 have outer coupling tubes 4.0, 4.1, 4.3, on the left and right vertical edges, respectively.
4.4. A second thin layer 36 is then applied along the coupling tubes 4.1 and 4.3 and the membrane 3.2 is attached. The membrane 3.2 has inner coupling tubes 6.1 and 6.3 on the left and right vertical edges. The inner coupling tubes 6.1 and 6.3 connect the membrane 3.2 to the second thin layer 3
6, the outer coupling tubes 4.1 and 4.3
is inserted into the In the subsequent slit wall formation process,
In each case, first a primary lamina is formed, and then a second lamina is formed therebetween. Although not shown, a jacket tube similar to the jacket tube 29 shown in FIG. 14 may be provided. The outer skin tube is provided at the vertical edge of the primary lamina, and the outer coupling tubes 4.0, 4.1, 4.3, 4.4 are provided in the annular recess of the outer skin tube.
will be provided.

As mentioned above, the coupling tubes 103, 104 are firmly and liquid-tightly attached to the vertical edges of the membranes 101, 102. As illustrated in Figure 24,
Both coupling tubes 103, 104 extend over the entire length of the membranes 101, 102, and have vertical slits 105, 104, respectively.
106. The outer coupling tube 103 has a larger diameter than the inner coupling tube 104, and the outer wall of the inner coupling tube 104 is in contact with the inner wall of the outer coupling tube 103. The membrane 102 of the inner coupling tube 104 projects through the longitudinal slit 106 of the outer coupling tube 103. Both longitudinal slits 105, 106 of the coupling tubes 103, 104 are located diagonally to each other in the attached state. Furthermore, membranes 101, 102 lie in a common plane.

In an advantageous embodiment, the membranes 101, 102 and the coupling tubes 103, 104 are made of liquid-impermeable plastics such as low or high density polyvinyl chloride, polypropylene, polyethylene or the like. Membrane 101,1
The materials for 02 are usually those with high diffusion resistance.
Thermoplastic elastomers based on natural or synthetic rubber can be used. Both coupling tubes 1
03, 104, a welding profile 108 (FIG. 24) is fastened to the outer wall of the inner coupling tube 103 in the vicinity of one of the insulations 107 forming a longitudinal slit 105.
The welding profile part 108 has an approximately L-shaped cross-section in its starting position before welding. One leg 109 of the welding profile part 108
is on the surface and connects the inner coupling tube 104 to this surface. On the other hand, welding profile member 10
The other leg 110 of 8 projects obliquely through the longitudinal slit 105 into the coupling tube 104 . If the hollow space 111 surrounded by both coupling tubes 103, 104 is not filled with suspension,
The legs 110 of the welding profile part 108 are
It is welded to the inner wall 112 of the outer coupling tube 103. Welding position 113 (31st,
32) provides a liquid-tight connection over the entire length of both coupling tubes 103, 104.

For welding, a welding device 1 is attached to the inner coupling tube 104.
14 is inserted (Figures 20 and 21) Welding device 1
14 has a casing 115 extending in the longitudinal direction and having a substantially circular cross section. The casing 115 is
Pressing body 1 distributed around the circumference and in the vertical direction
16 and a guide 117. A guide 117 projects radially from the casing and allows the welding device 114 to connect to the inner wall 118 of the inner tube 104.
and is supported by the inner wall 112 of the outer coupling tube 103. The casing 115 is the upper sealing cover 1
19 (FIG. 20), and the cover 119 includes:
A tension member 120, such as a tension rope, is fixed. The tension member 120 allows the welding device to be lowered and raised within the coupling tube 104. The welding device is a heating device 121 (21st
), and using the heating device 121, the leg 110 of the welding profile part 108 and the corresponding area of the outer coupling tube 103 are heated by the welding device 11.
It can be heated during pulling up in step 4. Heating device 121 in pulling direction 122 (FIG. 21)
A deformable portion 123 is attached to the casing 15 at the rear of the casing 15 . The deformed portion 123 is the welding device 1
The leg 110 of the welding profile 108, which is heated during the pulling up of the welding tube 14, is
The inner wall 112 of No. 3 is brought into contact with the inner wall 112 of No. 3. Pulling direction 12
2, a pressing portion 124 is immediately behind the deforming portion 123.
is provided. The pressing part 124 pushes the leg part 110 of the welding profile member 108 that comes into contact with the inner wall 112 of the outer joint pipe 103 into the outer joint pipe 103.
as a result of which a connection between the leg 110 of the welding profile part and the outer connecting tube 103 is obtained. Pressing part 1 in pulling direction 122
24, another pressing portion 125 is located rearwardly at a distance from
is provided. This pressing part 125 causes the leg part 110 of the welding profile part 108 to
It is pressed against the inner wall 112 of the outer coupling tube 103. This pressing member 125 is also attached to the casing 115 and projects radially beyond the casing.

The upper sealing cover 119 (Fig. 24) is secured with screws 12.
6,127, which is removably fixed to the casing. A bowden wire 128 is held in the edge region of the sealing cover 119, a sleeve 129 (FIG. 22) of the bowden wire 128 is removably fastened to the sealing cover 119, and a pull wire 130 of the bowden wire 128 extends along the axis of the casing 115. It is guided to the deformed portion 123 through a hole 131 penetrating in the direction (FIG. 23).
Furthermore, the sealing cover 119 has a through hole 132 (FIG. 24) for an electrical cable (not shown) leading to the heating device 121. The sealing cover 119 is also provided with a through hole 133 for a hose 134 (FIG. 22) for guiding cold air in the axial direction of the casing 115 to the heating device 121.

The pressing body 116 and the guide 117 are connected to the casing 1
They are distributed around the entire periphery of the casing 115 when viewed in the axial direction of the casing 115 (FIG. 24). Each pusher body 116 is of identical construction and is biased radially outwardly by a compression spring 135 (FIGS. 25 and 26), so that in the operating position of the welding device:
It tensions and abuts against the inner wall 118 of the inner coupling tube 104. The pressing body 116 has an outer surface 13 formed in a spherical shape.
6 (Figs. 22, 25, 26), and this outer surface 1
36 abuts the inner wall 118 of the inner coupling tube 104. The outer surface 136 is curved in the longitudinal and lateral directions of the pressing body. The pressing body 116 is formed into a substantially bowl shape and has a rectangular outline in a front view. Vertical surfaces 137 and 138 (25th
) also shows a casing 1 extending in the axial direction.
It is guided by the side walls 139, 140 of the 15 convex portions 141. The vertical surfaces 137 and 138 of the pressing body 116 are
Narrow surfaces 142 and 143 (26th
Figure). Side wall 1 of pressing body 116
37, 138, 142, 143 are spherical outer surfaces 1
36 by a bottom portion 146 (FIG. 26). The curvature of the outer surface 136, viewed laterally, is equal to the curvature of the inner coupling tube 104, so that the pusher body 116 is guided laterally reliably.
Since the outer surface of the pressing body 116 is also curved in the vertical direction (FIG. 26), the pressing body 116
It does not abut completely flatly on the inner wall 118 of 04. Therefore, when moving the welding device 114 within the coupling tube 104, it is prevented from tipping or becoming stuck, so that the welding device can be lowered and raised without difficulty even in relatively long coupling tubes. can do. Side wall 13 of pressing body 116
7, 138, 142, 143 are connected to each other by a mounting member 147 on the side opposite the bottom 145. Threaded bolts 148 and 149 pass through the mounting member 147 , the heads of the threaded bolts serving as stops for the pressing member 116 . Threaded bolts 148, 149 are screwed into casing 115. One end of the compression spring 135 is connected to the bottom 1 of the recess 141 (FIGS. 25 and 26).
50, and the other end of the compression spring 135 is in contact with the inner surface of the bottom portion 146 of the pressing body 116.

The pressing bodies 116 are all of the same construction and are each subjected to the force of a compression spring 135. compression spring 1
35 causes the pressing body 116 to be pressed against the inner wall 118 of the inner coupling tube 104. The maximum travel distance of the pusher 116 is limited by the heads of the threaded bolts 148, 149, which serve as stops.
This pressing body 116 ensures that the welding device 114 contacts the inner wall 118 of the inner coupling tube 104 within the coupling tubes 103 and 104 and is guided within the coupling tube 104.

The guides 117, 117' of the welding device 114 are
It is arranged immovably in the casing 115 and is provided in the area of the welding blowwheel element 108 . One leg 110 of the welding profile part 108
first projects inwardly into the coupling tube 104, so that the casing 115 of the welding device 114 has a flat part 151 (second
4), so that the welding device 114 can be moved axially within the coupling tubes 103, 104 by means of the legs 110 without difficulty. The guide 117 is also designed so that it does not come into contact with the inwardly projecting leg 110 of the welding profile part 108 . The guides 117, 117 are provided at the upper and lower ends of the casing 115 (22nd, 23rd
), axially overlapping in the area of the welding profile part 108. In the embodiment, the guide 11
7 is designed as a sliding shoe which projects approximately radially from the housing 115 in the region of the flat part 151. The sliding show is the outer joint pipe 10
It has a sliding surface 152 which is curved corresponding to the angle 3 and is in flat contact with the inner wall 112 of the outer coupling tube. The sliding surface 52 curves on the side of the leg 110 of the welding profile 108 and extends into a flat inclined surface 153 that extends parallel to the leg 110 of the welding profile 108 at a distance. It is transitioning. The inclined surface 153 is curved to form a flat portion 1
There is a transition to a side surface 154 lying transversely to 51. The side surface 154 extends parallel to the opposing side surface 155, and like the side surface 155, the flat portion 1
It is in contact with 51. The opposing side surface 155 abuts the sliding surface 152 and is located at a small distance from the adjacent edge 156 forming the longitudinal slit 105 of the inner coupling tube 104 . As shown in FIG. 22, the sliding surface 152 is continuously curved at the upper and lower ends in the axial direction, and has a flat upper surface 157.
and has transitioned to the lower surface 158. Upper guide 11
7 is located directly below the sealing cover 119, while the lower guide 117' (FIG. 23) is located directly below the casing 1
It maintains a small distance from the bottom edge of 15.

With this arrangement, the sliding shoe-shaped guide 117 engages with the leg 110 of the welding profile part 108. When the welding device 114 is lowered into the coupling pipes 103 and 104, the guide 117
is placed in the position shown in FIGS. 24 and 25 relative to the welding profile. If, as shown in Figs. 24 and 25,
If the legs 110 of the welding profile part need to extend outwardly, the welding device 1
14 on the inclined surface 153, the leg portion 11
0 is preferably pressed inward by the guide 117. Since the guides 117, 117 are coupled to the pressing body 116 which is biased by a spring, the coupling pipe 103 of the welding device 114,
Perfect guidance within 104 is obtained. The spring biasing of the pressure body 116 ensures automatic centering of the welding device in the coupling tube.

The casing 115 is constructed to be robust except for the above-mentioned through hole. Thereby welding equipment 11
4 is stably formed.

As can be seen from FIG. 22, the guide 117 and the pressing body 116 are arranged at the same height in the axial direction of the casing 115 immediately below the sealing cover 119. Guide 117 and pressing body 11
Another pressing body 116 and a guide 117 are arranged with a slight interval from 6 (22nd, 27th
figure). The pressing body 116 and the guide 117 are arranged angularly shifted from the pressing body and the guide located above them. Thereby, the coupling tube 1
Reliable guidance of the welding device 114 within 03,104 is ensured. The upper pusher 116 and the upper guide 117 are within the upper casing part 159 (FIG. 20), while the pusher 116 below
and the guide 117 are the other casing parts 160
It's within. Both casing parts are fitted with screws 161 to 163 (second
(Fig. 7). The casing part 160 has an elongated hole 131 for the pull wire 130 of the Bowden wire 128 and a through hole 1.
32, 133 are provided in the axial direction.

As shown in FIG. 22, casing portion 160
is connected to another casing part 164 which is removably coupled thereto. The casing portion 164 is attached to a dividing plate 165 (FIGS. 22 and 28). The dividing plate 165 has an approximately triangular contour and has screws 161 to 1 between the casing part 164 and the other casing part 164'.
It is attached by 63. There is an electrical connection part 166 (FIGS. 22 and 28) on the dividing plate 165,
This electrical connection 166 includes an axial hole 132.
An electrical cable (not shown) is guided therethrough. A heating coil 167 (FIG. 22) is connected to the electrical connection portion 166. Furthermore, air through holes 168 are provided in the dividing plate 165. The cold air supplied through the axial bore 133 passes through the through bore 168 and into the bore 169 (second
Figure 2) is reached. As shown in FIG. 28, a pull wire 130 of the Bowden wire 128 extends directly next to the dividing plate 165.

The heating coil 167 and the axial hole 169 are
It is provided in a ceramic body 170 (FIG. 22). The ceramic body 170 is surrounded by a casing part 171 which is designed to be detachable from the casing part 164'. Both housing parts 164' and 171 are of approximately cylindrical design. As shown in FIG. 22, the wall thickness of both casing parts 164', 171 is such that an elongated hole 131 for the puller wire 130 can be provided. Ceramic body 170 projects into casing portion 164' (FIG. 22). Heating coil 167 extends over the entire length of ceramic body 170. The ceramic body 170 terminates at an axial distance from the dividing plate 165. Air through hole 168 in dividing plate
The cold air flowing through first reaches a collecting chamber 172 provided between the dividing plate 165 and the ceramic body 170. Cold air from this collecting chamber 172 flows through holes 169 and is heated by heating coils 167 . Ceramic body 170
and the heating coil 167 form the heating device 121.

The holes 169 in the ceramic body 170 are all connected to the supply pipe 1 connected to the lower end of the ceramic body 170.
74 (Figure 23). In the flow path of the heated air, there is a thermocouple 1 that adjusts the temperature of the air.
75 is provided (FIG. 23). thermocouple 17
The wire 176 for 5 is connected to the casing part 17
1,164', 164 and is guided upwardly therefrom through hole 132.

The supply pipe 174 and the ceramic body 170 are connected to a nozzle 177. The nozzle 177 is part of the heating device 171 and the heated air flows from this nozzle 177 to the welding profile part 10.
8's leg 110. Nozzle 17
7 has substantially the same profile as the upper guide 117 (FIG. 29). The nozzle 177 has an outer surface 178 extending inside the elongated hole 105 of the inner coupling tube 104 at a distance from and parallel to the inner wall 112 of the outer coupling tube 103 . The curved outer surface 178 is curved at the end of the welding profile 108 facing the leg 110 and forms an inclined surface 1 extending parallel to the leg 110 at a distance.
It has moved to 79. External surface 178 and inclined surface 179
forms the outer surface of the nozzle body 180. The nozzle bodies 180 extend parallel to each other and have outer surfaces 17
8 and an inclined surface 179 at right angles. The nozzle body 180 is provided in an area outside the casing 115 (FIG. 23). External surface 178, inclined surface 1
79, and the transition areas on both sides have several outlets 183, 18 through which the heated air can exit.
4 are provided. As shown in FIG. 23, the outflow ports 183 and 184 are formed as slits that extend parallel to each other, overlap each other, and are arranged transversely to the axial direction of the casing 115. The outlets 183, 184 are arranged in such a way that the heated air reaches the leg 110 of the welding profile part 108 over its entire width and then reaches the flat wall 112 of the outer coupling tube 103 over a suitable width. It is arranged to reach across and into the transition area from leg 110 to leg 109 of welding profile 108 (arrow in FIG. 29). Leg 110 due to the heated transition region
A flow joint is formed that reduces the return force when changing direction. Outlet 183, 184
can also have other suitable shapes, such as rounded contours.

The supply pipe 174 is connected to the cylindrical casing part 18, which is removably connected to the casing part 171 by screws 186 to 188 (FIG. 29).
5 at a distance. The wall of the casing part 185 has Bowden wire 12
Elongated holes 131 for eight puller wires 130 are drilled in the axial direction. Casing part 185
is provided with a through hole 189 (FIGS. 21, 23, and 29) having a rectangular outline for passing the supply pipe 174 therethrough.

The casing part 185 has a deformation part 123, a pressing part 124, and a Bowden wire 1, among other parts of the casing part 190, which are formed to be robust.
A turning roller 191 for changing the direction of the 28 pulling wires 130 is housed. The deflection roller 191 is accommodated in a slot-shaped receiving space 192 in the housing part 190. Reception space 1
92 extends generally radially and deforms 12
3 and the pressing portion 124 are accommodated in a receiving space 193 which is considerably wider than the receiving space 192. A receiving space 192 in which a turning roller 191 is rotatably mounted is connected to a horizontal wall 1 at the bottom.
94 (Fig. 23). The pull wire 130 is turned by a turning roller 191,
The receiving space 1 can be pivoted about an axis 196 located transversely to the axial direction of the casing 115.
forming a fork portion 195 that is mounted within 93; The fork portion 195 is connected to the receiving space 193.
projecting beyond the casing part 190 from and at its projecting end, two fork legs 197,1
98 and supports a pressing portion 124 disposed between the two. The pull wire 130 is fixed to a fork section 195 to which the deformation section 123 is also fixed. The deformed portion 123 has an elongated hole 199 through which the tension wire passes (FIG. 30). Pressing part 12
4, in the illustrated example, fork legs 197, 198
This is a roller that is rotatably supported between the rollers and has a spherical surface. As shown in FIG. 23, the fork portion 195 is placed on the inclined portion 200 at the starting position. The ramp 200 is housed in the receiving space 193 and rises continuously to the outer surface of the casing part 190 (FIG. 23). The deformed portion 123 is formed into a plate shape and has the same width as the fork portion 195. The fork portion 195 has a rectangular portion 201 located inside the casing portion 190 and secured to the fork portion 195 by screws 202 (FIG. 30). This rectangular part 20
1 has a rectangular outline and in plan view (30th
The process moves to a trapezoidal end portion 203 in FIG. The trapezoidal end part 203 projects from the receiving space 193 and is connected by the leg 110 of the welding profile part 108 to the inner wall 112 of the outer coupling tube 103.
is pressed against. As shown in FIG. 21, the thickness of the end portion 203 decreases continuously from one longitudinal side 204 to the opposite longitudinal side 205. According to FIG. 30, the longitudinal side 204 of the end section 203 is the side of the deformation 123 facing the longitudinal edge 206 of the longitudinal slot 105 of the inner coupling tube 104 with the welding profile 108. Welding equipment 1
14 is pulled up in the coupling tube 103, 104, the inwardly projecting leg 110 of the welding profile part 108 is moved by the end part 203.
It is pushed outward toward the inner wall 112 of the outer coupling tube 103 . The end surface 207 of the end portion 203 is
07 has a minimum spacing on the longitudinal side 204 with respect to the inner wall 112 of the outer coupling tube 103, and the longitudinal side 20
5 and extend at an angle so as to have a maximum spacing (FIG. 30). Upper surface 208 of end portion 203 (second
3) is continuously curved into an end surface 207 forming an acute angle with said surface 208 and connecting at an obtuse angle to the lower surface 209 of the end portion 203. By configuring the end portion 203 in this way,
The legs 110 of the welding profile projecting inward are securely gripped, and the outer coupling tube 103
It can be configured to curve outward in the direction of. In this case, since the pressing part 124 is disposed immediately behind, the leg part 110 bent outward and held by the deforming part 123 is
It is firmly pressed against the inner wall 112 of No. 3 and welded to the inner wall 112. The fork portion 195 including the pressing portion 124 is inclined upward by the inclined portion 200 . The deformed portion 123 similarly slopes upward, but at a larger angle than the fork portion 195 (FIG. 23). Inclined part 20
0 is fork part 19 when pulling up the welding equipment.
It serves as a support part for supporting 5. At this time, the pressing part 124 of the fork part 195 presses the leg part 110 of the welding profile part 108 bent outward against the inner wall 112 of the outer coupling tube 103. Thereby, the leg 110 is pressed firmly and firmly against the outer coupling tube.

The fork portion 195 has a tension rod 210 (the 23rd
It is pivotally connected to another fork part 211 by means of FIG. A pressing portion 125 is mounted between mutually parallel leg portions 212 and 213 (FIG. 31) of this other fork portion 211. In the illustrated example, the pressing portion 125 is formed as a rotatable roller with a spherical surface. The fork part 211 has a casing part 214 (second
1, 23). The casing part 214 is a receiving space 2 provided for receiving the fork part 211 and in which the fork legs 212, 213 project outwardly beyond the casing 115.
It has only 15. Fork part 211 , like fork part 195 , is pivotable about an axis 216 perpendicular to the longitudinal axis of casing 115 . The axis 216 is kept at a greater distance from the welding profile 108 than the pivot axis 196 of the fork 195 (FIG. 23). When the fork portion 211 is at rest, the receiving space 215
It is supported at the bottom 217 of. The upper fork portion 195 has a recess 218 on the lower fork portion 211 side.
It has a recess 218 in which the pull rod 210 is pivotally mounted. The draw rod 210 passes through holes 219 and 220 in the ramp 200 and extends through the casing portion 190.
It has play within and projects into a hole 221 extending axially through the fork portion 211. In this hole 221, the pull rod 210 is pivoted to the fork portion 211. Pivot axes 222, 223 provided at the ends of the drawbar 210 extend parallel to each other and perpendicular to the longitudinal axis of the casing.

Further, the lower fork portion 211 is connected to the tension spring 2
24 by the bottom 217 of the casing part 214
being pulled towards. One end of the tension spring 224 is fixed to the fork part 211 in the hole 221, and the other end is fixed to the fork part 211 in the hole 221, and the other end is fixed to the fork part 211 in the hole 221.
It is fixed within 25.

As shown in FIG. 31, the fork portion 211 is
It is guided by side walls 226 and 227 of the receiving space 215. The centers of the recess 218 and the hole 221 are offset so that the distance from the longitudinal side 205 or side wall 226 is shorter than the distance from the opposing longitudinal side 204 or side wall 227. Reception space 215
is open toward the vertical slit 105 of the inner coupling tube 104 over its entire length (FIG. 21).

Connected to the housing part 214 is an end-side housing part 228 which is of solid design and is releasably connected to the housing part 214 by means of screws 229 to 231. Inside the casing portion 228, the pressing body 116 and the guide 11 are provided.
7' is provided (Fig. 32). Guide 11
7' is formed differently from the sliding shoe-shaped guide 117. This is because the guide 117' is
When the welding device 114 is pulled up, the leg 110 of the welding profile part 108 is pulled up from the outer coupling tube 103.
Only after the outer coupling tube 103 is welded to
This is because it comes into contact with As shown in FIGS. 23 and 32, the guide 117' extends over substantially the entire height of the casing section. Guide 11
7' is removably fixed to the casing portion 228 by screws 232, 233 (FIG. 21);
It has longitudinal sides 234 and 235 that are parallel to each other (FIG. 32). The longitudinal sides 234 and 235 have a rounded transition to the end face 236. The end surface 236 is connected to the inner wall 11 of the outer coupling tube 103 over its entire width.
It is curved so as to touch 2. Guide 11
7' is the leg 11 of the welding profile part 108 which is welded to the outer coupling tube 103 at a small distance from the longitudinal edge 156 of the longitudinal slit 105;
It is located at a distance from the end face 237 of 0.

Both coupling tubes 103 and 104 fit into each other,
When the suspension is extracted from the internal space surrounded by both coupling pipes 103 and 104, the welding device 1
14 is lowered down into the coupling tube. The welding device 114 is then suspended from the tension member 120 and slides downward in the coupling tube under its own weight. If the welding equipment does not descend smoothly, a pressure rod or the like can be used to encourage downward movement. For this reason, the airtight cover 119
(FIG. 24) is provided with an insertion hole 238 of irregular cross-section, through which a corresponding irregular part of the pressure rod can be inserted. After insertion, the profile is rotated through 90°, so that a form-locking connection of the pressure rod and the housing 115 of the welding device 114 is obtained. The welding device 114 is then lowered downwardly by means of a pressure rod. Welding device 114
In this case, the guides 117, 117' are connected to the inner coupling tube 10.
It extends inside the vertical slit 105 of No. 4 and is installed so as to come into contact with the inner wall 112 of the outer coupling pipe 103. In this case, by forming the guide 117 into a sliding shoe shape and by forming the guide 117' into a narrow width, both guides 117, 117 can be formed into a welding profile member that protrudes inward when the welding device is lowered. It is ensured that there is no contact with the legs 110 of 108. Welding device 114
The automatic centering of the coupling tubes 103, 104 is ensured by means of a spring-loaded pressure body 116. When lowering the welding device 114, the pressing parts 124 and 125
Inwardly protruding welding profile part 10
In order to avoid contact with the legs 110 of 8, the pressing parts 124, 125 are moved counterclockwise around axes 196 and 216 from the activated position shown in FIG. is forced to rotate upward. At this time, the deformed portion 12
3 were also taken away. Both fork parts 195, 211
is simultaneously swiveled upwards by the Bowden wire 128 via the pull rod 210. The heating device 121 with the nozzle body 180 is constructed essentially identically to the sliding shoe-shaped guide 117, so that the nozzle body 180 also does not come into contact with the leg 110 of the welding profile part 108 during lowering of the welding device. When welding device 114 is lowered to its lower end position, Bowden wire 128 is freed. Next, the fork part 215 and the tension rod 2
10, the fork portion 195 also connects to the deformed portion 123.
At the same time, it is turned back to the operating position shown in FIG. At this time, the heating coil 167 is heated,
Air is introduced through the hole 169 via the supply tube 134. As the air passes through this hole 169, it is heated by the heating coil 167 and is discharged from the outlets 183, 184 of the nozzle body 180. At this time, the heated air flows toward the inner surface of the leg 110 on the outer coupling tube 103 side and toward the corresponding region of the inner wall 112 of the outer coupling tube. Therefore, the legs 110 and the inner wall 112 of the outer coupling tube 103
The area used for the support of the legs 110 is brought to the temperature required for welding. The temperature of the air is measured and precisely regulated using a thermocouple 175. At this time, the welding device
It is raised continuously by 0. Heating device 12 of the leg 110 of the welding profile part 108
When the part heated by 1 is pulled up,
outwardly by the deformed portion 123, the outer coupling tube 103
The inner wall 112 of the inner wall 112 is bent in the direction of the heating area. Immediately after this, the region of the leg portion 110 bent outward by the deforming portion 123 and held in this state is heated by the pressing portion 124 disposed immediately behind the inner wall 112 of the outer coupling tube 103. The material is pressed firmly against the material, and welding is performed at this time.
FIG. 31 shows the welding area 113.

In order to quickly cool the welded area, there is a
Opening 239 of cooling air duct 240 (23rd
) is provided, and air for cooling the welding part is introduced through this opening 239. The cooling air impinges on the weld location 113 and cools the weld. Next, the welding area of the leg 110 of the welding profile 108 is once again firmly pressed against the inner wall 112 of the outer tube 103 by the pressing part 125, so that the welding profile 108 and the outer supply tube 103 are A solid welded joint is obtained. This welding process is continuously performed while the welding device 114 is being pulled up. A downward reaction force acting on the fork parts 195, 211 during lifting, which is opposite to the lifting direction, is reliably received by the inclined part 200 or by the bottom 217 of the casing part 214.

In the illustrated and described embodiment, the welding profile 108 is only provided at one edge of the longitudinal slot 105 of the inner coupling tube 104. Of course, the opposite edge 1 of the vertical slit 105
56 can also be provided with a welding profile of this type. At this time, the nozzle body 180 and the guides 117, 117' are designed to prevent the legs from being accidentally deformed when the welding equipment is lowered, and to prevent the heated air from being inwardly protruded when the welding equipment is pulled up. is suitably formed so as to reach both legs of the body. Pressing parts 124, 125 and deforming part 1
23 is also formed such that both legs are simultaneously pressed outward against the outer coupling tube 103 by the pressing portion and the deforming portion.

In other embodiments not shown, the pressing portion 124
is also used as a deformation part, and as a result, the deformation part 12
There is no need to provide 3. The pressing part 124 presses the welding profile member 1 when pulling up the welding device.
The heated leg 110 of 08 is turned around, pressing the leg 110 firmly against the outer coupling tube 103. At other points, this example
It corresponds to the embodiment described.

The heating device 1 is configured such that the heating area of the leg 110 of the welding profile part 108 does not expand outwards.
It is expedient to provide at least one leg guide extending in the upper region of 21 and in the immediate vicinity of the heating device 121. This guide is formed almost identical to the guide 117 in cross section, but
A short distance from the outer coupling pipe 103 is maintained.

In the embodiment shown in FIGS. 33 to 35, both coupling tubes 303, 304 have longitudinal slits 30
5,306 are tightly connected to each other by extrusion welding. When the intermediate space 307 surrounded by both coupling tubes 303, 304 is free of suspension, the inner coupling tube 304 passes through the slit 30.
5 along the longitudinal edges 308 and 309 are each welded via one weld seam 379 to the inner wall of the outer coupling tube 303 by extrusion welding. The weld seam 379 connects both connecting pipes 303 and 30.
Provides a tight connection between the two over the entire length of 4.

Welding device 3 is attached to inner coupling tube 304 for welding.
12 is inserted (Fig. 33). Welding device 312
is a vertically elongated casing 313 whose cross section is approximately circular.
have. The casing 313 has a guide 315 and a pressing body 314 distributed over the entire circumference and length of the casing 313.
project from the casing 313 in the radial direction, and these guides 315 allow the welding device 312 to be connected to the inner wall 316 of the inner coupling tube 304 and to the outer coupling tube 3
It is supported by the inner wall 317 (FIG. 33) of 03. The casing 313 has an upper sealing cover 318
(FIG. 33), and a tension member (not shown) such as a tension rope is fixed to the sealing cover 318, and this tension member is used to connect the welding device to the joint pipe 3.
It can be lowered into 04 or raised again. If the welding device 312 does not descend smoothly when lowered, a push rod or the like can be used for assistance. For this purpose, it is expedient for the sealing cover 318 to be provided with a profiled insertion hole (not shown) for inserting the profiled part of the push rod. After inserting the irregularly shaped part of the push rod,
For example, it can be rotated by 90°, resulting in a form-locking connection between the push rod and the housing 313 of the welding device. The welding device is then easily lowered downwards by means of a push rod.

Inside the casing 313, a heating device 319 and an extrusion screw 32 are arranged one after the other in the radial direction.
1 and a welding shoe 322 are provided. Welding material necessary for welding both the coupling tubes 303 and 304 flows out from the welding shoe 322. The heating device 319 is fixed concentrically to the casing 313 in two cylindrical frames 323 and 324 arranged in series with a spacing between them. The heating device 319 includes a supply pipe 326 for supplying air to be heated.
It has a cylindrical housing through which it passes. Air flows downwardly within tube 326 in the direction of arrow 327. The supply pipe 326 connects the coupling pipes 303 and 30
4 and extends upwardly to an air supply and current control element (not shown). The air supply pipe is supported inside the device casing 313 in at least one other frame 328 at a distance above the casing 325 . The other frame 328 is similar to the frames 323 and 324 of the casing 325 of the heating device 319.
It is supported by 13 inner walls. casing 325
A heating element (not shown) is further provided therein, which heats the air flowing through the tube 326 to the required welding temperature. For supplying current to the heating element, a heating cable 329 is used which is guided upwards to the control element. The casing 325 has a smaller diameter than the casing 313 of the welding device 312, so that the casing 325
maintains a distance from the inner wall of the casing 313 over the entire surface.

A motor 320 , which is arranged at a distance below the heating device 319 , is fastened to a carrier 330 that is fastened to the inner wall of the casing 313 of the welding device 312 . The carrier 330 has a motor 3 at its center.
It has through holes for 20 drive shafts 331. The drive shaft 331 is rotatably supported in the lower region of the carrier 330 by at least one bearing 332 . The bearing 332 is supported by a conically tapered support 333 and is immovably fixed in the axial direction by a fixing plate 334. The support 333 is arranged at a distance below the carrier 330 and has a central receptacle for a bearing 332, which can be inserted into the support 333 from above. Support plate 33
3 is fixed to the inner wall of the casing 313 and tapers downward. Furthermore, the support body 333 is
There is a transition to a cylindrical portion 335 in which the extrusion screw 321 is housed.

The extrusion screw 321 has a granulating section 336 directly connected to the drive shaft 331 and a conveying section 33.
It consists of 7. The granulating section 336 is housed within the support 333 , while the conveying section 337 is surrounded by the cylindrical section 335 . Transport section 33
7 is a protrusion 33 on which the cylindrical part 335 is placed;
It terminates at a distance from a sealing portion 338 having a diameter of 9. As shown in FIG.
The outer surface of 9 forms an extension of the outer surface of the cylindrical portion 335. Similarly, the sealing part 338 is connected to the welding device 31.
It is fixed to the inner wall of the casing 313 of No. 2.
The protrusion 339 is provided with an inlet 340 that tapers downward in the shape of a funnel.
40 transitions to a conveyance duct 341 for supplying welding material to the welding position. Conveyance duct 3
41 is a sealed portion 338 over almost its entire length.
The welding shoe 322 is housed in a shoe body 342 of a welding shoe 322 fixed to the lower surface of the shoe. welding show 32
2 has a rectangular cross section (FIG. 35) and extends up to the longitudinal slit 305 of the inner coupling tube 304. The conveying duct 341 consists of a part lying on the longitudinal axis 343 of the welding device 312 and a conveying part connected at right angles to this part and extending to the outlet 344 of the welding shoe 322 .

A welding wire 345 made of plastic suitable for welding is used as the welding material. Welding wire 345 is fed from above by a guide tube 346 (FIG. 33). The guide tube 346 extends upwardly for a corresponding length, and the welding device 312
It is guided downward to a carrier 330 inside the casing 313 at a distance from the inner wall. The guide tube 346 is connected to the sealing cover 318 and the frame 32.
8,323 and extends to the carrier 330. The carrier 330 is provided with a through hole 347 connecting the guide tube with a hole 348 in the support 333 . The bore 348 opens into an annular chamber 349 surrounding the granulation part 336 of the extrusion screw 321 .

In order to weld the connecting tubes 303 and 304 that are inserted into each other, a welding device 312 welds the inner connecting tube 304.
The inside is lowered to the bottom. Thereafter, when the welding device is pulled up, both coupling pipes 303 and 304 are welded together. Therefore, the welding wire 345 is pushed downward through the guide tube 346 and the screw 321
is moved to the granulation section 336. The granules 336 are formed as screws, the webs of which cut the ends of the welding wire extruded from the holes 348 of the support 333 into granules when the extrusion screw rotates. Thereby, the welding wire is subdivided into individual granules as it enters the annular chamber 349. The web of the granulating section 336 conveys the cut granules to the cylindrical section 335 .
Inside, the granules are extruded through the conveying section 3 of the screw 321.
37 and conveyed downward to the inlet 340. In order to bring the granules into the condition required for welding, tube 32
Air is supplied via 6. As the air passes through heating device 319, it is heated to the temperature required for welding. The heated air leaves the heating device 319 in the area above the intermediate plate 350. In order to prevent heated air from coming into contact with the guide tube 346 for the welding wire 345 in the region of the heating device 319, the casing 325 of the heating device 319 extends between the two frames 323, 324 and is spaced apart from the casing 325. Isolator 3 surrounded by
It is surrounded by 51. The separator 351 extends in the area between the frame 324 and the intermediate plate 350 into the area of the guide tube 346, so that no heated air reaches the guide tube. A heated air pipe 352 extends between the intermediate plate 350 and the carrier 330 for causing the heated air flowing out of the heating device 319 to flow downward. The heated air pipe 352 connects the motor 320 and the casing 313 of the welding device 312.
and the through hole 35 of the carrier 330.
3. The support body 333 has a through hole 3 for sending heated air further downward into the annular chamber 355.
It is equipped with 54. The annular chamber 355 is connected to the cylindrical portion 33
5 and a sleeve 356 surrounding the cylindrical portion 335 at a distance.
The annular chamber 355 connects above to the lower end of the support 333 and is located above the sealing part 338 . The heated air therefore circulates within the cylindrical section 335 and the granules of the welding wire 345 conveyed by the conveying section 337 are heated to the welding temperature. Annular chamber 3
55 communicates with a hole 357 in the shoe body 342 for allowing heated air to flow out of the annular chamber 355 in a region diagonally above the welding material outlet 344.
The opening 358 of the hole 357 faces toward the welding position, where the welding material is heated to a suitable temperature immediately before being fed when the welding device 312 is lifted up. hole 357
a thermocouple 35 protruding into the welding device and connected to said control element outside the welding device via electrical wires 360;
9 can be used to monitor and control the temperature of the heated air exiting the welding show 322. The temperature of the heated air is adjusted to such a level that the granules in the cylindrical part 335 melt during transport by the extrusion screw 321, so that the molten material of the welding wire 345 flows through the inlet hole 340. The height is adjusted so that it reaches into the hole 341 and exits through the nozzle and out the outlet 344.
The outlet 344 allows the melted plastic to flow out along the edges 308, 309 of the vertical slit 305.
It is shaped to form a melt seam 379. In this way, a weld seam 379 is continuously formed when the welding device 312 is pulled up.
During pulling up, the extrusion screw 321 is constantly driven by the motor 320, and the welding wire 345 is continuously fed through the guide tube 346. Air is also continuously supplied within the supply tube 326. To ensure that the welding wire 345 can move downwardly through the guide tube 346, the diameter of the welding wire is significantly smaller than the inner diameter of the guide tube 346. The separator 351 is provided in the region of the heating device 319 to ensure that the welding wire is already heated in the region of the heating device and is prevented from adhering to the inner wall of the guide tube 346.

To cool the motor 320, cooling air is supplied to the motor 320 from the outside. As shown diagrammatically in FIG. 33, cooling air is supplied to a hose or tube 361, not shown in detail. Cooling air enters the motor via connection 362 at the top end of the motor housing to cool the motor.
Exhaust gas is provided on the upper surface of the motor housing and passes through a pipe 364 to a welding wire guide pipe 346.
It is discharged from the motor housing through a discharge connection 363 which is connected to the motor housing. The exhaust air thus enters guide tube 346 via tube 364 and flows to cool welding wire 345 as it flows upwardly. Therefore, the welding wire is reliably prevented from adhering to the guide tube.

The separator 351 is sufficiently strong so that the casing 313 of the welding device 312
No. 19 area is not heated above the allowable temperature. Therefore, the welding device 312 can be pulled up without difficulty during welding.

In FIG. 36, the heating device 319a is connected to the motor 320.
The welding device 312a provided between the extrusion screw 321a and the extrusion screw 321a is shown. motor 320a
Also in this embodiment, the carrier 33 is fixed to the inner wall of the casing 313a of the welding device 312a.
It is attached to 0a. The drive shaft 331a of the motor 320a is considerably longer than in the previous embodiment. The drive shaft 331a passes through the heating device 319a. The heating device 319a has a cylindrical outer sleeve 365, the outer diameter of which is smaller than the inner diameter of the casing 313a. outer sleeve 3
65 surrounds the inner sleeve 366 at a distance. The inner diameter of the inner sleeve 366 is the same as that of the drive shaft 3.
It is slightly larger than the outer diameter of 31. Both sleeves 3
The space between 65 and 366 is filled by an insulator 367 and for the air to be heated.
It has several through-flow ducts 368 extending in the axial direction. Furthermore, within the insulator 367 there is a heating element (not shown) for heating the air flowing through it to the melting temperature of the welding wire 345a to be welded.
is provided. In this embodiment as well, the heating device is connected to the casing 313 by both frames 323a and 324a, which are superimposed with an interval in the axial direction.
It is held within a. The length of the insulator 367 in the axial direction is equal to the length of both sleeves 36 in the axial direction.
It is shorter than 5,366. Both sleeves 365,3
The upper end of 66 is spaced below the carrier 330a, while the lower end rests on a cover plate 369 fixed to the support 333a.

During the welding process, the air to be heated is supplied by a supply pipe or a supply hose, which is schematically shown, and then flows through the carrier 330a into the through-flow duct 3.
68 and is heated to the desired temperature as it circulates within the once-through duct 368. The heated air then flows into the through hole 354a of the support 33a, as in the previous embodiment. Heating device 319a
is insulated to such an extent that the welding wire 345a is not heated in this region, so that there is no risk of the welding wire adhering to the guide tube during movement. Except for the above-mentioned differences, the welding device 312a has the same structure and operation as in the previous embodiment.

In the embodiment shown in FIG. 37, heating device 319
b is arranged below the welding shoe 322b. Therefore, the air to be heated needs to be supplied to the extrusion screw 321b from below. Therefore, the supply pipe 326b is connected to the casing 31 of the welding device 312b, contrary to the embodiment of FIG.
3b and a sealing cover 318
b and the frame 328b above the motor 320b.
and a cover plate 36 on which the motor is mounted.
9b, a support body 333b, a sealing part 338b,
Sealing plate 370 below welding shoe 322b
and both frames 323b and 324b holding the casing 325b of the heating device 319b. Heating device 319b and lower frame 3
The casing 313 is spaced below the casing 24b.
A lower sealing plate 371 is provided that is fixed to the inner wall of b via the periphery. The sealing plate 371, together with the corresponding surface areas of the lower frame 324b and the casing 313b, forms a collecting chamber 372 into which the air supplied through the tube 326b enters. From this collecting chamber 372, the air flows into the heating device 319b, as indicated by the arrow, and is formed by the upper frame 323b, the upper sealing plate 370 and the corresponding surface area of the casing 313b. It reaches inside the upper gathering room 373. A tube 374 connects this upper collecting chamber 373 with the annular space between the cylindrical part 335b and the sleeve 356b. Therefore, the heating device 31
The air heated to the required temperature in 9b reaches the annular space 355b, in which it heats the granules of welding wire 345b carried by the extrusion screw 321b to the melting temperature.

In this embodiment, the heating device 319b and the point of supply of the welding wire 345b to the extrusion screw 321b are sufficiently separated from each other and the heated air does not reach the area of the welding wire, so that the welding wire does not need to be cooled separately. There isn't. Therefore, the welding wire can be pushed downward to the screw through the guide tube 346b extending between the motor 320b and the inner wall of the casing 313b.

Otherwise, welding device 312b operates similarly to the welding device of FIG. 33. Welding wire 345b
is constantly cut into individual granules by the granulating section 336b and the extrusion screw 32 is continuously driven during the lifting of the welding device 312b.
1b and conveyed downward. Cylindrical part 335b
In this case, the welding wire granules are melted by heated air and are removed from the extrusion screw to the shrew body 342b.
into the hole 341b. The molten welding wire flows out from the welding shoe 322b, and the vertical edge 308 of the vertical slit 305 of the inner coupling tube 304,
309 and thereby this longitudinal edge 30
A tight welded connection in the area of 8,309 is obtained over the entire length of the coupling tube. The exhaust air supplied for cooling the motor 320b is connected to the connection 362b.
into the motor via the discharge connection 3.
It leaves the motor via 63b. Welding wire 34
The pipe 364b connecting to the discharge connection 363b is connected to the guide pipe 3, since it is no longer necessary to cool the pipe 5b.
It extends axially upward parallel to 46b. The sleeve 356b surrounding the cylindrical portion 335b at a distance is sufficiently spaced from the surface of the casing 313b, as in some of the previously described embodiments, so that the tube 374 can be attached to the sleeve 356.
6b and the surface of the casing 313b.

The welding shoes 322, 322b are made of an easily deformable or processable material, such as silicon. Thereby, the welding shoe can be processed in such a way that, in its deformed state, it can easily adapt to the deformations of the parts to be welded together. Silicon has the advantage of good sliding properties, so that the welding shoes 322, 322b can slide along the parts 303, 304 to be welded without difficulty when lifting the welding device.

As shown in detail in FIGS. 38 and 39, the welding shoe 322 is formed with its end surface 375 to abut completely flat against the inner coupling tube 304. Since the welding shoe is made of a material that can be easily machined, its end face 375 can always be produced so that it rests flat against the parts to be joined in each case. The welding shoe 322 has two legs 376 and 37 that stand vertically in the upper region of the heated air duct 357 and extend parallel to each other.
7 (Fig. 39). Legs 376, 37
7 is located on the outer surface of the welding shoe and is formed integrally with the welding shoe. Legs 376, 377
The end face forms a part of the end face 375 of the welding shoe. The end face 375 is provided with a deformation groove 378 that extends in the direction of movement of the welding device and contacts the outlet 344 of the outlet duct 341 . In this embodiment, the deformation groove 378 extends upwardly and downwardly from the borehole 344. The deformed groove 378 is the hole opening 34
It serves to press and deform the weld seam 379, the so-called weld bead, flowing out from the weld 4. Therefore, the weld seam 379 is
As soon as the welding material flows out of the hole opening 344, it is deformed, thus ensuring a reliable welded connection. The deformation groove 379 can be configured to taper downwards, so that the weld seam is increasingly pressed and compressed during lifting of the welding device.

Welding shoe 322 has several functions. First, it is deformed by the deformation groove, pressed,
Forming the welding material to be compressed. Furthermore, heated air is blown out through the welding shoe 322.

The welding shoe 322b of the embodiment shown in FIG. 37 is similarly advantageously designed.

Of course, it is not necessary to force the welding shoes 322, 322b to have the deformation grooves 378. Even without the deformation groove 378, a satisfactory welding of both coupling tubes is obtained.

[Brief explanation of the drawing]

Figures 1 to 8 are schematic plan views showing the stages of slit wall formation and membrane bonding, Figure 9 is a schematic cross-sectional view of the coupling tube, and Figure 10 is the coupling tube and welding the coupling tube to each other. Schematic cross-sectional view of the device for
Figure 12 is a schematic cross-sectional view of the connecting tube and the membrane filled inside the connecting tube, Figure 12 is a schematic cross-sectional view of the connecting tube and the connecting part, and Figure 13 is a schematic cross-sectional view of the connecting tube with a reinforcing ring attached. 14 is a schematic cross-sectional view of the coupling tube with an additional jacket tube, and FIG. 15 is a schematic longitudinal section of the coupling tube showing the hole in the outer coupling tube together with the drilling device. , FIG. 16 is a schematic cross-sectional view of the outer coupling tube and the slit protection device of the outer coupling tube, FIG. 17 is a schematic cross-sectional view of the slit protection device of the outer coupling tube, and FIG. 18 is a schematic cross-sectional view of the outer coupling tube and the slit protection device of the outer coupling tube. Fig. 19 is a schematic plan view of several slit wall sections when forming the slit wall by the pilger method, and Fig. 20 shows the connections in the connecting tubes to be welded together. 21 is a side view of the upper half of the device according to the invention as arranged; FIG. 21 is a view showing the lower half of the device of FIG. 20; and FIG. Partial side view shown,
23 is a partial side view showing a part of the lower half of the device of FIG. 21 in cross section, FIG. 24 is a sectional view taken along line 24--24 of FIG. 22, and FIG. 25 is a cross-sectional view taken along the line of FIG. 26 is a sectional view taken along line 25-25, FIG. 27 is a sectional view taken along line 26-26 in FIG.
28 is a cross-sectional view taken along line 27--27 in
29 is a cross-sectional view taken along line 29-29 of FIG. 23, FIG. 30 is a cross-sectional view taken along line 30-30 of FIG. 23, and FIG. 31 is a cross-sectional view taken along line 23 of FIG. Sectional view taken along line 31-31 of No. 32
The figure is a cross-sectional view taken along line 32-32 in FIG.
3 is a longitudinal sectional view of a device according to the invention in which connecting tubes to be welded together are arranged; FIG. 34 is a cross-sectional view of two connecting tubes to be connected to each other by the device of FIG. 33; FIG. Figure 35 is line 35- in Figure 33.
35 is a sectional view showing a part of another embodiment of the device according to the invention, FIG. 36 is a partial side view showing a part of another embodiment of the device according to the invention in section, and FIG. 38 is an enlarged sectional view of the welding shoe of the apparatus according to the invention, FIG.
The figure is a cross-sectional view taken along line 39--39 of FIG. 38. 1... Hollow space edge, 2... Supporting liquid, 3...
Membrane, 4...Outer coupling tube, 5...Inner space, 6...
Inner coupling tube, 15.1, 15.2, 17...Press wheel, 108...Welding profile member, 121...Heating device, 123, 124...Deformation part, 322, 322b...Welding shoe.

Claims (1)

[Claims] 1. A method of inserting a membrane into a slit wall and bonding the membranes to each other, the slit wall being inserted into a slit wall in a known manner.
In said method formed in a stage system or a two-stage system, membranes as an additional flow stabilizing means are inserted stepwise into the slit wall and the vertical edges of these membranes are successively connected to each other. 1 forming a slit wall section by dredging, scraping or jetting and supporting the hollow space edge 1 by inserting a support liquid 2 into the slit wall section; 2. Insert the membrane portion 3 through the entire depth of the slit wall portion, and attach the outer coupling tube 4 with a slit or a hole to the vertical edge of the membrane in front in the slit wall formation direction. , ． 3. Forming the next slit wall portion along the outer coupling tube 4 and cleaning the internal space 5 of the outer coupling tube 4 with a high-pressure water stream or the like after the slit wall portion has begun to harden; 4. By inserting the inner coupling tube 6 with a slit, which has been fixed in advance to the membrane section, into the outer coupling tube 4 of the membrane section 3.1, the membrane section 3.2
into the slit wall part, the outer diameter of the inner coupling tube 6 being smaller than the inner diameter of the outer coupling tube 4; 5 After the slit wall begins to harden,
I.6 Cleaning the inner space 5 of the outer coupling pipe 4 with a high-pressure water stream or the like, and emptying the inner space 5, I.6 The contact surface 39 of the inner coupling pipe 6
for forming the slit wall portion (, etc.).
A method characterized in that the method of forming the slit wall section is repeated and the excavation of the next slit wall section is started at least after the membrane 3 has been applied. 2 Contact surface 39 between inner coupling tube 6 and outer coupling tube 4
2. A method according to claim 1, characterized in that the tubes are cleaned before joining the tubes. 3. The method according to claim 1 or 2, characterized in that the tightness of the joint 7 is controlled. 4 When forming the slit wall in a one-stage system,
As long as it is still possible to incorporate curing retarders into the support liquid mixture, if necessary, and to clean the interior space, the support liquid can be transferred to the above-mentioned method steps.
4. The method according to claim 1, wherein the method is characterized in that the method is cured up to 5 times. 5 Before inserting the membrane part, the inner space 5 of the outer coupling tube 4 is filled with a hose-like membrane 22 filled with liquid 23.
The hose-like membrane 22 is protected against the intrusion of the slit wall suspension 2 by means of a connecting tube 6.
and pulling it out again before insertion of the
Any one of claims 1 to 4
The method described in. 6 After inserting the coupling tube 4 of the membrane 3 into the annular recess 33 of the jacket tube 29 whose outer diameter corresponds to the width of the slit wall end and forming the next slit wall section, the jacket tube 29 6. A method according to any one of claims 1 to 5, characterized in that the material is drawn out again. 7. The inner space 5 of the outer coupling tube 4 is removed by step.
8. The method according to claim 1, characterized in that, in step 8, the method is filled with a suitable material based on plastics or minerals or is poured with said material. . 8 Step. 1 or . 2. 1 or. According to claims 1 to 7, the uncured support liquid is replaced by the remaining slit wall material, in particular by the hardened slit wall material. the method of. 9 Between the first thin layers 34 and 35, the first
membrane 3.1, which is inserted into the next thin layer 34, 35;
3.3, along the outer couplings 4.1, 4.3, digging down the secondary thin layer 36 and the two inner coupling tubes inserted into the outer coupling tubes 4.1, 4.3; 6.1, 6.3 to bond membrane 3.2 to membrane 4.
9. A method according to claim 1, characterized in that the tension is between 1 and 4.3. 10. At the vertical edge of the membrane 3.1, an outer coupling tube 4 with a continuous slit is fixed in a coupling position 24.1 opposite the slit, and that the membrane adjacent to said membrane 3.1 3.2, the inner coupling tube 6 provided with a slit is welded, glued, or fixed at the coupling position 24.2 opposite to the slit of the coupling tube, and the outer coupling tube 6 is The diameter is
A packing device characterized in that the inner diameter is smaller than the inner diameter of the outer coupling tube 4. 11. Device according to claim 10, characterized in that the connecting tubes 4, 6 are made of the same material as the membranes 3.1, 3.2, in particular plastic. 12. The device according to claim 10 or 11, characterized in that the membrane 3 has a multilayer structure. 13. Claim 12, characterized in that the membrane consists of three layers, the outer two layers consisting of a liquid-impermeable plastic and the middle layer consisting of an impermeable metal foil. The device described in. 14 The membrane comprises a permeable drain layer 42, an outer filter fiber layer 43 and a liquid-tight plastic foil 4.
14. The device according to claim 12 or 13, characterized in that it consists of: 4. 15 A glow cord 25, which produces a continuous bond 26 during extinction by plasticizing the plastic, connects contact surfaces 39 and 3 over the entire length of the tube.
15. The device according to claim 11, wherein the device is embedded in plastic. 16. Any one of claims 11 to 14, characterized in that a reinforcing portion 27 in the form of a cylindrical shell made of any solid material is embedded in at least one of the coupling tubes 4, 6. Apparatus according to one. 17 The outer tube 29 with an outer diameter equal to the width of the slit wall has an annular recess 33 in the cross section, and the inner diameter of the outer tube 29 is larger than the outer diameter of one of the coupling tubes 4 or 6. In addition, the recessed portion 33
Claim 1 characterized in that the hole width of the vertical slit hole is larger than the thickness of the membrane 3.
17. Apparatus according to any one of clauses 1 to 16. 18 that the outer coupling tube 4 has a perforation 30 instead of a slit-like hole and that the lower edge of the membrane 3.2 has a blade which, upon insertion of the inner coupling tube 6, brings the perforation 30 into a continuous slit; 18. The device according to claims 11 to 17, characterized in that a device 31 having a shape of 31 is attached thereto. 19. According to any one of claims 11 to 18, characterized in that a tensile protection 32 is provided to protect the threaded hole of one coupling tube 4, 6. The device described. 20. The device according to any one of claims 11 to 19, characterized in that a groundwater pump 40 is provided in the interior space 5. 21. The invention according to claims 11 to 20, characterized in that slots 41 are provided at the connection locations 24.1, 24.2 between the permeable drain layer 42 and the inner coupling tube. Apparatus according to any one of the above. 22 Films 3.1, 3.3 of the first thin layers 34, 35
characterized in that outer coupling tubes 4.1, 4, 3 are arranged on both edges of the membranes 3, 2, and inner coupling tubes 6.1, 6, 3 are arranged on both vertical edges of the membranes 3, 2. An apparatus according to claims 11 to 21, wherein: 23. A device for carrying out the method according to any one of claims 1 to 9, comprising a joining machine 9 with press wheels 15.1, 15.2, 17. The press wheel is supported by the inner wall of the inner coupling tube 6 via the spring portion 6,
A device characterized in that it is fixed to a frame 37 and that devices 10.1, 10.2 for introducing heat, adhesive or extrusion substances are attached to the joining machine 9. 24 The device for introducing heat has two wedge-shaped heating plates 10.1, 10.2, which are connected to the frame 37 of the joining machine 9 and which are connected to the heating wire 21 and the power supply. 24. Device according to claim 23, characterized in that it is arranged between contact surfaces (38, 39) with a connection (18). 25 Pressure pipe 1 for cleaning contact surfaces 38, 39
the injection nozzle 13, which is connected to the supply unit via 9, is fixed to the coupling machine 9;
Claim 2, characterized in that the injection port 12 is open in the direction of the contact surfaces 38 and 39.
Apparatus according to paragraph 3 or paragraph 24. 26. An apparatus for carrying out the method according to any one of claims 1 to 9, comprising a heating device 121 for heating the parts to be welded together, and at least one pressing device 124 arranged after the heating device 121;
125 and at least one deformation part 123:124 is arranged after the heating device 121, which deformation part is arranged when the welding device 114 is running.
Projecting part 110 of welding profile part 108
device, characterized in that the deformation portions 123; 124 are adjustable from an operating position to a rest position. 27 The deforming portion 124 is a pressing device 124, 125
27. Device according to claim 26, characterized in that it is formed by a portion of. 28 The deforming portion 123 is connected to the pressing devices 124, 125
a part spaced apart from the welding device 114, which part is in particular plate-shaped and which is spaced apart from the welding device 114 in
27. Device according to claim 26, characterized in that it is located laterally relative to 22. 29 The deformation part 123 is pivotably mounted, in particular transversely to the direction of movement 122 of the welding device 114,
29. Device according to claim 26, characterized in that it is pivotable, in particular about an axis 196 located vertically. 30 The deformed portion 123 has a plate-shaped end portion 203, the end surface 207 of the end portion 203 extends obliquely, and the thickness of the end portion is particularly smaller than that of the end portion 20.
Claims 26 and 28, characterized in that they are continuously reduced over the entire width of 3.
30. Apparatus according to any one of clause 29. 31. Claim 26, characterized in that the deformation part 123 is adjustable in position by means of a tensioning device 128, in particular a Bauden wire, and is biased by a spring in the direction of its working position.
The device according to any one of paragraphs 28 to 30. 32 The deforming part 123 is rigidly connected to a pressing device 124, 125, which has at least one, in particular two pressing parts arranged one after the other in the direction of movement 122 of the welding device 114. , the pressure part being rotatably supported in at least one protruding arm, in particular in the fork part, between the legs (197, 198 and 212, 213) of the carriers 195, 211;
4,125. Device according to any one of claims 26, 28 to 31, characterized in that it is 4,125. 33 the pressing parts 124, 125 are adjustable from an operating position to a rest position, in particular pivotable;
Claim 26, characterized in that it is biased by a spring in the direction of the operating position, and that the pressure parts 124, 125 are adjustable in position by means of a tensioning device 128. 33. The device according to any one of clauses 32 to 32. 34. Device according to claim 32 or 33, characterized in that the carrier 195, 211 is supported in the working position by a stop 200, 217. 35 The tensioning device 128 is connected to one pressing part 124
is fixed to a carrier 195, and the carrier 195 is
Claim 26, characterized in that it is connected to the carrier 211 of the further pressing part 125 via a tension member 210, in particular via a tension bar.
35. Apparatus according to any one of clauses 34 to 34. 36. Claim 34 or 36, characterized in that the heating device 121 is supported on a carrier 195 which is placed on an inclined part 200 which is inclined upward in the direction of the pressing part 124. Apparatus according to paragraph 35. 37 Some of the supports 116, 117 are formed as sliding shoes 117 with curved sliding surfaces 152 for contact with the coupling tube 103, said sliding surfaces 152 being particularly rounded and 37. Device according to any one of claims 26 to 36, characterized in that it transitions into an inclined surface 153 forming an acute angle with respect to the surface 152. 38 The welding device 114 connects the supporting parts 116, 11
Claims 26 to 37 include a casing 115 to which 7, 117', deformable parts 123, 124, pressing devices 124, 125, and heating device 121 are attached.
Apparatus according to any one of clauses. 39. The heating device 121 according to claims 26 to 38, characterized in that the heating device 121 has a nozzle body 180 with outlets 183, 184 for heated air oriented in various directions. Apparatus according to any one of the above. 40 The heated air supply section 174 is attached to the nozzle body 180.
40. The installation according to claim 39, characterized in that: are connected. 41 The casing 115 is provided with a heat-resistant mounting 170 in which at least one heating element for heating the air is housed in a hole 169 through which air can pass. 167. Device according to any one of claims 38 to 40, characterized in that, in particular, a heating coil is accommodated. 42. Claim 42, characterized in that in the upper region of the heating device 121 at least one guide for the leg 110 of the welding profile part 108 is provided, which extends in particular to the vicinity of the heating device 121. Apparatus according to any one of ranges 26 to 41. 43. In an apparatus for carrying out the method according to any one of claims 1 to 9, in which the membranes are connected to each other via connecting tubes provided with slits and inserted into each other. , the device 31
2, 312a, 312b are extruders 321, 321a, 3 for extruding a substance capable of welding.
21b and the device 312,3
12a and 312b are extruders 321 and 321
a, 321b and welding wires 345, 3
45a, 345b to extruders 321, 321
a, 321b, and the extruder 321, 321a, 321b has at least one guide 346, 346b that allows the extruder 321, 321a, 321b to move to the guide 346, 321b.
The welding wire 345,3 operates in the hole opening area of 346.
45a, 345b, and after the crushing parts 336, 336b, heating parts 335, 35 are provided to melt the finely crushed welding wire.
6; 335b; 356b are provided, and the extruders 321, 321a; 321b are provided.
at least one outlet 3 directed towards the welding location
at least one welding shoe 32 with 44
2,322b. 44 Insulator 35 in the area above the extruders 321, 321b, at least in the area of the guide 346.
Heating device 3 surrounded by 1,367
19, 319a are provided, and insulators 351, 36
44. Device according to claim 43, characterized in that 7 completely surrounds the heating device 319, 319a, particularly with a spacing, and is arranged in the housing 365, 366 of the heating device 319a. . 45 At least one air supply pipe 326, 326a passes through the heating device 319, 319a, and the air supply pipe 362, 326a is connected to the coupling pipe 303,
45. Apparatus according to claim 44, characterized in that it communicates through 304 with an air source. 46. The crushing section 336, 336a, 336b is a screw connected to a conveying section 37 formed as a screw, and the conveying section 37 is surrounded in particular by heating sections 335, 356; 335b, 356b. Device according to any one of claims 43 to 45, characterized in that: 47 Heating section 335, 356; 335b, 356
b has a heating duct 355, 355b, in particular an annular space, which is connected to the pipe 354, 352;
Air supply pipes 326, 32 via 54a, 374
6a; combined with 326b, said tubes 354, 35
2; a portion of 354a, 374 is the support body 333
hole 354, and the other part is the motor 32
Claims 43 to 4, characterized in that the tube 352 extends in the lateral area of 0.
7. Apparatus according to any one of clause 6. 48 The heating device 319b is the extruder 321b
48. Device according to any one of claims 43, 45 to 47, characterized in that it is located in the region below . 49 Air supply pipe 326b is connected to heating device 319b
It leads to the gathering room 372 located below the gathering room 37.
2 is connected to the gathering chamber 373 above the heating device 319b by a pipe, and both gathering chambers 37
2,373 are connected to each other by a flow duct passing through the heating device 319b, and the upper collecting chamber 373 is connected to a pipe 374 connected to the heating duct 355b. 49. The apparatus of claim 48. 50. Claims 43 to 49, characterized in that a cooling air pipe 361 and an air exhaust pipe 364 leading to a guide 346 for a welding wire 345 are connected to the motor 320.
Installation as described in any one of the paragraphs. 51 heating devices 319, 319a, 319b;
Motors 320, 320b, extruder 321,
321a and 321b are heating parts 335 and 35
6; Casing 31 along with 335b and 356b
51. Device according to any one of claims 43 to 50, characterized in that it is housed in a 3,313a, 313b. 52. Any one of claims 43 to 51, characterized in that a heated air duct 357 connected to the heating ducts 355, 355b communicates directly above the welding shoes 322, 322b. The device described in. 53 Thermocouple 35 in the heated air duct 357
53. Device according to claim 52, characterized in that 9 is provided. 54 The welding shoe 322, 322b has on its end face 375 a deformation groove 378 extending in the direction of movement of the device and connecting downwardly to the outlet 344, the deformation groove 378 having a deformation groove 378 that 54. Device according to any one of claims 43 to 53, characterized in that it tapers in the direction.