DE1058417B - Method and device for the production of pipes or similar hollow bodies from cementitious material - Google Patents

Description

The invention relates to the production of pipes or similar hollow bodies from cementitious Material.

It has already been proposed to produce elongated tubular concrete parts by longitudinal a trench, which is an outer part shape for the concrete part, concrete distributed and the same during the shelf so affected that it forms the lower part of the tube, while the upper part thereby is shaped that on a rotating component, the outer contour of the inner contour of the later pipe corresponds to, in the same rhythm as the lower part is formed, poured concrete where the component supports the poured concrete for a certain time and the upper part of the pipe is shaped and smoothed with the help of a vibrator.

The surface of the pipe cavity is peculiar to the production according to the previous working technique of the concrete material is correspondingly rough, has cavities or interruptions and is not liquid-tight. The present invention enables it is to achieve a pipe cavity with a smooth, hard and, to a large extent, water-impermeable surface.

This object is achieved according to the method according to the invention, in which in a manner known per se formwork walls extending along the tubes and a rotatable one that is displaceable in the longitudinal direction of the formwork walls Find core use, achieved by the fact that the cementitious material in the Fills the mold space at a level between the center of the core and the top of the core, then onto the exposed top of the core applying more cementitious material than the former and rotating the core further cementitious material of the first-mentioned type fills up to the full height.

The normal cementitious material has a certain moisture content. The scattered dry, more cementitious material adheres to the core moistened by the concrete mass and becomes at the core rotation through contact with the normal cementitious material over the entire Pipe cavity elapsed, leaving the voids present in the normal cementitious material fills and a thin cement coating and thus a pipe cavity with a smooth, hard, durable and a highly water-impermeable, possibly acid-proof lining will. If desired, the usual compaction of the cementitious material can be carried out, the in the normal cementitious material contained moisture to be pressed towards the core and this is moistened even more, without the method and device

for the production of pipes

or similar hollow bodies

made of cementitious material

Applicant:

Johan Diedrik Aucamp,
Johannisburg, Transvaal
(South African Union)

Representative: Dr.-Ing. W. Abitz, patent attorney,
Munich 27, Gaußstr. 6th

Achieving the lining is impaired.

In a further embodiment of the invention, the molding can be reinforced by one with a Wire winding surrounded core used, its winding by winding a wire on the Core has been generated. Pipe branches in the pipe wall are made in the simplest way by means of fittings available, which extend from the pipe cavity to the top of the pipe.

The method according to the invention is particularly suitable for laying a pipe section in sections on the spot, where, after a section has been made, formwork walls and core are made accordingly postpones and by repeating the procedure to establish the following section but also for the production of hollow bodies such as pipes, fence posts and the like.

A device which is well suited for carrying out the method according to the invention and which in itself known way with formwork walls and one between the same rotatable and displaceable in the longitudinal direction arranged core is provided, characterized in that a pair of the mold space Formwork walls delimiting its two long sides from one of the length of the pipe section to be formed exceeding longitudinal expansion on a sliding or sliding piece bridging it carry the core,

909 528/254

3 4

means that can be placed on their outer sides, their material closed, which is used for the new pipe part 2

Transport facilitating yokes is pulped connected to each other.

The rotatable core 10 is mounted in a bearing 15.

; have renzendes bridge piece, through which stores that of a sliding piece or saddle 16

ler core is passed through. 5 hangs down, which along the upper parts 4 of the

This device has the advantage that it rests very easily and elongated formwork walls 1 and

lamit to be insusceptible to failure and can be moved at low cost. The core 10 is further separated by two

: ur jointing and furthermore a light sealed ball or roller bearing 17 supported, the

pulling the core from the produced molding to on both sides of the core 10 and below it

allow. io axis are arranged. These bearing seats are on

Further advantages and purposes of the invention arms 18 attached by front extensions

: r result from the description of the formwork walls 1 protruding downwards in the drawing. Both the ab-

Development illustrated embodiments of a sealed bearing 17 and the main bearing 15 are

implementation of the method according to the invention which is adjustable in height and prevents over-

ienden device. It shows i ₅ moderate wear of the bridge piece 9 during

Fig. 1 in side view, partially in section, the setting of the core 10.

Tjesamtaufbatt the device for forming an at the rear end of the core 10 is a cone

Drt and place to be poured pipe string, wheel 19 attached, which is connected to a sink at the end of a

Fig. 2 is an end view of part of Fig. 1, right shaft 22, which is rotatable by the sliding piece 16

3 and 4 individual views. 20 bar is stored, attached bevel pinion 21 in engagement

Figures 5 and 6 show an expansion joint for that. At the upper end of the shaft 22 is a hand

Any tube attached to the crank 23 through which the core 10 rotates

Fig. 7 and 8 forms of modification, can be shifted.

FIG. 9 shows an extension for the casting of a hollow. Above the shaft 22 is between the hand crank 13

Fence post, 25 and the sliding piece 16 arranged a loose sleeve,

10 shows the production of drainage or loading which a winch drum 24 forms. A clutch 25

watering pipes, connects the drum 27, if necessary, with the

Fig. 11 shows a modification form. Wave. The yoke 7 at the rear end 26 of the

Tn the drawing are with 1 two opposing formwork walls 1 placed tind is attached to these, via arranged, longitudinally extending ₃₀ forms with those yokes that are referred to in front of the rib formwork walls, the length of which can be arranged slightly piece 9, not only more than twice the length of the stiffening element to be produced. The yokes 7 also serve to handle / or to lay the pipe section 2 and hold the formwork walls, as FIG. 3 shows. At the front height equal to the total vertical thickness of the end 8 of which is a formwork wall 1 is a detachable tube 2. The formwork walls 1 preferably consist of a hinged spacer 27 which serves to keep the formwork from sheet metal, the lower part 3 of each wall being kept at a certain distance from one another during the formation of the pipe 2 in a formwork wall,
is inclined and the upper part 4 is bent inward with a larger between the rear yoke 7 and the bridge angle. The upper edge 5 of each piece 9 is a rope 28 with a suitable span formwork wall 1 is bent outwards and forms a ₄₀ voltage adjustment device 29 attached and placed around the seat or a guide 6 for a winch drum 24 on the formwork. The tension adjustment arranged sliding piece. set up can be automatic in the form of a strong

The scarf wan del are at their rear ends tension spring 29, but it can also be a normal and where otherwise necessary over its length against the turnbuckle can be used,
Straddling each other secured by yokes 7. These yokes 45 for the production of a pipe length according to the seating on the formwork walls 1 and hold them against finding in place, the sclial walls 1 will use the pressure of the cementitious for the casting of the pipe 2 and the core 10 in the manner described Material or concrete built in their quantity. Then a fairly dry bed becomes. clay mixture between the core 10 and the

The front end 8 of the formwork walls 1 is open walls 1 filled and, if desired, left under. At a distance from this end 8, tamped at the same turn as a mechanical tamper, the length of the pipe to be laid is a bridge in such a way that the filling is below the top piece 9 arranged and attached to the formwork walls. side of the core 10 is enough. This is followed by pure cement This bridge piece has a bore for the sprinkled onto the exposed upper side of the core 10 Implementation of a rotatable core 10. A 55 and the remaining part of the concrete mix refilled, Rubber cleaning ring 11 for the core 10 is tamped in and through a suitable one on the top recess inserted around the hole. side of the formwork walls 1 sliding template or

In the end 12 of the tube 2, a B-bushing 13 gauge can be formed. The core 10 will be inserted after the pure. This socket IS is easily rotatable on the cement has been added, with the help of the hand core 10 and is rotated with this taken out crank 23 so that the core 10 to men the cement, so that a small annular chamber in the end 12 of the Formation of a smooth and essentially wasserun-section of the tube 2 remains, in which the permeable surface in the bore of the tube 2 nose 14 of the core 10 can then enter when this passes for. Any trapped air is displaced by the pouring of the next pipe section 2 in place and the smoothing effect of the rotating core 10 ^:. Place is used. This recess in the pipe 2 for the nose 14 makes this possible from the bore of the pipe 2 to the outside. Pour the new part of the pipe 2 with a Simultaneously with the cement, dolomite or a small angle to the already poured part of the raw material can be used to form a more acidic 2 Pipe 2 to the recess with the new cement or concrete 70 can be set.

5 6

The winch drum 24 is now with the crank 23 This reinforcement is τοπ in pressure lines

tied together. By further rotating the core 10, regular lengths are often very desirable. Such

the latter through the bridge piece 9 through pressure pipes can in the manner already described

the shaped tube 2 in the direction of the end 26 of FIG

Formwork walls 1 pulled out. The sliding piece 16 5 bridging piece 9 with a centering shoulder 34 (Fig. 7)

and the parts attached to this move can be equipped and a corresponding

with the core 10 saving 35 in a plate 36 (Fig. 8) at the end of the

When the spacer 27 at the front end of the mold, i.e. H. at the end 14 of the core 10 to form

Formwork 1 is released, the formwork walls 1 have complementary centering elements according to the

the effort to jump apart and move away from io approach 34 is provided. That of the recess 35

the cast pipe 2 to solve. The corresponding parts are used together with the

are then moved lengthways to cast around the pipes.

Form for the next pipe length 2. The bridge piece 9 is in the vertical position be-formwork walls 1, a suitable gauge 46 may be written and shown attached so that tube 2 is a sink, to get their arrangement with the desired 15 right end. In some cases, especially To facilitate angles to the horizontal. if the pipe 2 is added a further length

A pipe should be cast in the manner described, a beveled end face of the pipe 2 in front requires a connection that is compatible with the joint. For this purpose, the concrete during hardening, and a downstream piece 9 shown in Fig. 11 gefolgenden expansion invoice can be used instead of bridge 7Λ around a bridge piece 47 carries. For this ao shown type used and the Gtimmi cleaning ring expansion joint is a short pipe length 30 11, as shown at 48, can be modified. The surface of galvanized sheet metal or some other material 49 of the bridge piece 47 can be provided with ribs 50, which sits loosely on the core 10 and with, so that channels in the inclined surface of the tube 2 of an outer rubber sleeve 31 are provided and are formed which facilitate the production of a satisfactory, suitable coating of a 25-position compound with an attached pipe lubricant between the pipe section 30 and the length.
Sleeve 31 is provided. It is sometimes desirable to have venting points in the

For the insertion of the expansion joint, the pipeline: to be provided, For this purpose a is formed by the tube 30 and the sleeve 31, in a suitably shaped piece of pipe, for example from the pipe length 2 to be cast is a special cast iron, to be provided and arranged in such a way that bridging plate 32 is provided, the thickness of which corresponds to the gap that it is in the cementine during the manufacture of the pipe corresponds to the length of the pipe 2, which is poured for the training or concrete material. One such stretch was left. This bridging tube piece is shown at 37 in Fig. 1,

32 expediently consists of two halves, which are also suitable as a tube of the type mentioned have vertical butt with each other so that after 35 fence posts. So that, according to the invention, the Pipe has been poured and the shuttering walls 1 th pipes are used for this purpose Having taken away the two halves of the can, it is desirable to have them in at least one Plate 32 can be removed and the length of 213 cm instead of a normal length of wish gap remains. The bore of the plate 32 by 152 cm, the usual length of the core 10, gives the rubber sleeve 31 and is thus set to the normal 40. It is therefore an end 38 for the casing 1 fixed bridge piece 9 arranged that the provided, the width of which to accommodate and position half of the pipe section 30 poured into the pipe 2 tion of a short core 39 is sufficient. The core 39 is, while the other protruding half of the is provided with a handle 40 with which he Pipe section for the next pipe length 2, the following in the cast pipe or in the hollow cast fence end is poured around, is determined. The Elasti- 45 post 2 can be rotated. The other end of the The elasticity of the rubber sleeve allows the contraction of the pipe is poured on the normal core 10, and expansion of the concrete. With this arrangement, a hollow post of

If the cast iron pipe 2 is to be reinforced, the 213 cm length will be cast. It has been found that reinforcement is expediently formed in the form of the device used for shaping the core so that it is difficult to rotate and pull out the tube 2. If the normal core 10 is longer than 152 cm, that's okay. position of a wire coil reinforcement is a suitable The wiring of the fence post can, for example, neter wire with its end at one end of the fact that when casting short pipe core 10 attached, z. B. pieces inserted through a diametrical bore diametrically in the length of the post 45 in the core 10 out. Then the core 10 or wooden dowels are used, which are rotated for the purpose of formation by the handle 23, so that the wire is wound onto 55 of the desired holes in the post after the core has been tied. When the cement or concrete material is easily wound out, the elasticity of the wire means that it can be beaten.

they are a sufficient distance from the bore of the The invention can be used for the manufacture of drainage pipe 2 gets even if the inner diameter pipes are used. The production goes in of the coil by subsequently stretching it 60 in the manner already described. The zero entreduced has been. If, however, the Inrtendtirch- or Betonmaterial is poured in until it reaches the upper knife the coil is too small, the core 10 can be reached with the rotatable core 10 side. Be on it a casing piece, for example a sleeve, is provided with shaped pieces 41 (FIG. 10) between the formwork walls 1 and the wire wrapped around the sleeve to be inserted. These fittings 41 are available twice To give the coil a larger inner diameter. 65 den and each consist of a rod 42, which extends over

The reinforcement winding can extend around the core 10 the full length of the pipe to be cast,

arranged between this and the formwork walls 1 Each rod 42 carries a number of short rod-shaped

will. To hold the reinforcement in place in pieces 43 which are attached to bar 42 in alignment

the wall of the tube 2 can be special wire hooks so that the ends 44 of each row are on the

33 can be used. 70 hit the top of the rotatable core 10. The ends

Claims (12)

can be beveled so that they rest on the periphery of the core 10. After inserting the fittings, the pouring of the pipe is brought to an end, and when the Shahvands 1 are removed and the fittings 41 pulled out, there are a series of holes on each side extending from the outside of the pipe to the top of the bore of the same . If these drainage pipes are used as fence posts, the holes can be used for the passage of the tensioning wires. Suitable arrangements can be provided for holding the reinforcement wires in the space between the core and the shuttering walls. Furthermore, the wires can be prestressed in a manner known per se when the cement or concrete material is poured around them. If T-pieces, branches, sprinklers or other approaches to the pipes are desired, these can be pre-formed and the shuttering walls 1 designed accordingly so that the aforementioned approaches are inserted between the shuttering walls before the pipe 2 is poured. As will be apparent from the foregoing, the invention provides means for making cement and concrete pipes, as well as separate hollow cement articles such as armored pipes having a smooth, hard core, and laying them in place. Patent claims: 1. Process for the production of pipes or similar hollow bodies with a non-circular outer contour made of cementitious material using formwork walls that extend along the pipes and a rotatable core displaceable in the longitudinal direction of the formwork walls, characterized in that that the cementitious material is filled into the mold space at a height between approximately the center of the core and the top of the core, then on the exposed core top applies more cementitious material than the former and while turning the core, further cementitious material of the first-mentioned type on the fills up to the full height. 2. The method according to claim 1, characterized in that that for the purpose of reinforcing the pipe, a core surrounded by a wire winding used by creating the winding by winding a wire onto the core. 3. The method according to claim 1 or 2, characterized in that pipe branches in the pipe wall is produced by means of fittings, which extend from the pipe cavity to the top of the pipe extend. 4. Process according to claims 1 to 3, characterized in that for the purpose of generation successive line sections of a pipe section in place after manufacture of a section of formwork walls and core shifts accordingly and through repetition of the procedure produces the following section. 5. The method according to any one of claims 1 to 4, characterized in that for the purpose of connection successive pipe sections in the free end of the latter each one itself around the actual pipe cavity extending cavity of larger cross-section than that Forms the tube cavity and fills in with the manufacture of the following tube section, with the core up to the connection to the pipe cavity of the previous section or in the same extends into it. 6. The method according to any one of claims 1 to 5, characterized in that for the purpose of connection successive pipe sections in the free end of the latter each have a tubular Connection element, which is provided with a rubber cover, on one part along its length and the protruding part into the abutting end of the following Section. 7. The method according to claim 6, characterized in that that one for the purpose of creating joints between successive pipe sections when forming a following section with the interposition of a divisible spacer works. 8. Device for performing the method according to claim 1 to 7 with shuttering walls and a core rotatably and longitudinally displaceably arranged between the same, characterized in that a pair delimit the mold space on both of its long sides Formwork walls (1, 1) from a longitudinal expansion which exceeds the length of the pipe section to be formed carry the core (10) on a sliding or sliding piece (15 to 18) bridging them, by means of yokes (7) that facilitate their transport are connected to one another and a das have a pipe end delimiting bridge piece (9) through which the core (10) passed is. 9. Apparatus according to claim 8, characterized in that the bridging piece (9) with a scraper ring (11) made of rubber is provided. 10. Apparatus according to claim 8 or 9, characterized in that the core (10) means (45) for defining reinforcement wires. 11. Device according to one of claims 8 to 10, characterized in that an additional, the formwork walls (1,1) bridging part (27) at their end facing away from the core drive is provided. 12. Device according to one of claims 8 to 11, characterized in that the core (10) at the free end with a device for its rotation and extraction from the pipe part is provided, which via a bevel gear (19, 21) with a vertically upwardly extending Drive shaft (22) is in connection and with one effecting the longitudinal movement of the core Winch (24) can be coupled. Considered publications:
German patent specifications No. 602 305, 927 977. 1 sheet of drawings © 909-524/254 5.5i