DE1038355B - Method and device for producing seals in pipes, with the exception of screwed or flanged pipes, in particular stoneware pipes - Google Patents

Description

GERMAN

It is known, pipe joints by potting and caulking with sealing materials of the most varied How to seal potting compounds based on bitumen, tar or sulfur. Lead seals are also used known in connection with tar and white knitting as well as cementing with spatulas, In addition, rubber in ring shape or other profiles is used.

While with vertical, pipe strings both the introduction of any sealing material and the Centering the tubes makes no problems because the individual tube lengths when nested can be easily aligned, or an irregular The heel at the sealing points does not play a role in the case of drop strands, is in the case of horizontal lines a continuous sole without heels is desirable in order to ensure unimpeded drainage and around Avoid deposits.

In the previous above-described method of laying horizontal lines, a Centering of the pipe strings and, above all, a continuous sole without heels just by reworking in the pipe trench at the tar rope caulking or by lifting or lowering the Pipes can be achieved, an additional work in which, apart from the expenditure of time, one has to be conscientious and the understanding of the executor is dependent. For subsequent potting even the introduction of any closing organs on the sleeve is necessary. This is done in Usually a clay bead with a sprue is formed around the pipe. Here, too, are considerable Care and expenditure of time necessary. It must be avoided that neither potting material leaks out, which represents a loss, or that clay penetrates into the socket gap and thus faulty casts arise. The inflow of insufficient amounts of sealant is known to cause voids in the potting compound due to air pockets. Furthermore, the potting material, which smokes when heated, is that on top of that still contains root-repellent, harmful chemicals in the narrow and deep construction pits obstructive to work. It is also never guaranteed that by unrecognizable disabilities before Potting, really the required amount, of sealing material as needed to achieve flawless Adhesion, water pressure resistance and root tightness is required in the sealing room is introduced. Through the; later failure of part of the sealing chamber due to slow rotting of the tar rope, then the deficiencies just described become evident.

It is also known that pipe seals before joining the pipes by inserting or Method and device

for the production of seals for pipes, with the exception of

screwed or flanged pipes, in particular stoneware pipes

Applicant:

Heinrich W. Müller,

Essen-Bredeney, Steinberg 5

Application of sealing collars are made on the socket or spigot end. These However, they have the disadvantage that with out-of-round pipes, as they are mostly in stoneware, due to manufacturing difficulties result, no continuous pipe SoMe can be generated.

There are also combinations of sealing sleeves and tapes known that protrude slightly beyond the spigot end of the pipe, the shortcoming here can be seen in the fact that the sealing and load-bearing area is very small, with the out-of-roundness of pipes a triple sealing element cannot be introduced with certainty or the insertion end of the pipe must receive a special training or a collision with the small load-bearing sealing surface the pipes themselves becomes possible.

The novel method according to the invention for producing seals on pipes using of any casting compound excludes all of the aforementioned defects. The procedure consists in that one is outside at the pipe end or inside in the pipe socket or in the pipe rebate with the help of casting molds Before laying the pipes, prefabricate conical seals that fit into one another, that even with out-of-round pipes, a continuous pipe sole without a step when retrofitted the pipes is reached. When the conical seal is cast on at the end of the pipe, it is simultaneously a, small protruding bead is produced.

The advantage and the technical progress achieved by the method according to the invention consist in the fact that a sewer system is necessary

809 600/275

Claims (6)

agile, smooth, continuous pipe sole is achieved. There is no special work and material expenditure for the introduction of a final and the altitude correcting amount of tar rope. Labor, equipment and material expenditure for the second outer closure of the sealing space is no longer necessary. Only so much potting material is used that a seal that is sufficient in terms of tightness, quantity and depth is achieved. However, the existing sealing space is completely filled with sealing material that is resistant to roots, adhesive and water pressure. Cavities due to the later rotting of the tar strings do not occur, which prevents local bacterial accumulation and thus their attack on the sealing material. The small protruding bead cast on the end of the pipe prevents the pipe material from hitting one another directly, which can lead to tension and breakage. The prefabrication of the seals, i.e. H. The most important sealing work on the pipe end or in the pipe socket when laying pipes is carried out according to the invention in the drying process, outside the narrow construction pit under improved working conditions. The only thing left to do in the construction site itself is to push the pipes into one another. This eliminates several materials to be kept on site, such as tar strands, clay, sheet metal ring or the clay rope for creating a closed casting space, etc. The method and the devices required to carry out the method are to be explained in more detail with the aid of the drawing. Fig. 1 shows the application of the seal to the male pipe end, Fig. 2 shows the application of the seal to the pipe socket; Fig. 3 is an enlarged section of Fig. 1; Fig. 4 shows the joined pipe ends with a continuous pipe sole below. The devices for performing the method according to the invention consist of a hollow shape a, which is composed of base plate 1, collar 2 and stop bracket 3 to produce the conical seal 7 at the plug-in pipe end, and a mold core b with a support or retaining bracket 11 and a stop 9 for producing a likewise conical seal 12 on the inner wall of the pipe socket. The hollow shape α has an adjustable stop angle 3. The stop angle 3 is to adapt to possibly occurring large deviations in the wall thickness z. B. adjustable with a wing screw 4. In addition, a flat, elastic ring 5 is arranged centrally on the bottom of the hollow shape α, which ring has a smaller outer diameter than the lower inner diameter of the hollow shape. This creates a small protruding bead 13 on the end face of the pipe end during casting, which on the one hand prevents the pipe material from coming into direct contact when the pipes are later laid, but on the other hand allows the conical sealing surfaces to be fully overlapped. After the plug-in pipe end 6 of the pipe is placed in this shape and the inner wall of the pipe rests against the stop bracket 3, the conical annular space between the pipe wall and the conical collar 2 of the hollow mold a can be potted with a potting compound. Prior cleaning, drying and priming of the pipe parts to be treated is a matter of course in accordance with the regulations. A simple line code, e.g. B. at 8 at the contact point of the stop bracket 3 is carried out on the outside of the pipe with the primer that has already been used. To produce the seal at the socket end of the pipe, as shown in Fig. 2, the mandrel b is placed in the socket base in such a way that the inner pipe wall and the inner wall of the mandrel b merge smoothly into one another at one point. To carry out this measure, a stop 9 reaching into the tube is attached to the inside of the mold core b. The point at which the inner mold core wall and the inner pipe wall merge smoothly into one another should lie as precisely as possible in the surface line of the first marked contact point 8 on the pipe end 6. This new point on the pipe socket is also on the pipe shaft, for. B. at 10, marked. The mold core b has, as already stated, a support or retaining bracket 11. After the core ring b has been inserted in accordance with the regulations and the marking 10 has been applied, the conical annular space between the pipe socket and the mold core is also potted with a potting compound. If you have the hollow shape α and the mold core b before potting with any mold release agent, z. B. techn. Glycerine, lightly coated, the pipe with the molded seal can easily be removed from the pipe socket by simply turning it from the hollow mold α or the mold core b after the casting compound has hardened. It now emerges that the conicity of the molded-on seal at the pipe end corresponds to the conicity of the molded-on seal in the pipe socket or in the pipe set. It is not necessary that the molded seals be conical; it can e.g. B. also open or dismantled hollow shapes or core rings are used, the other, z. B. bead-shaped prefabricated seals made of potting compound. Laying the pipes with the pre-formed seals is now very easy, and in cramped construction pits it can be done by simply pressing the pipes together using a crowbar and a cross piece of wood placed on the free end of the pipe or, in the case of larger pipes, by pulling them together using winches. The markings made on the outside of the pipes during the manufacture of the preformed seals must be placed as precisely as possible continuously next to one another during installation. The smooth, stepless pipe sole according to the invention is then automatically obtained, as shown in FIG. Due to the conicity of the preformed sealing surfaces described, the sealing surfaces stick together when the tubes are pressed into one another, and a seamless, homogeneous seal is achieved. In the same way, a perfect seal is achieved if the prefabricated seals have a shape other than a conical shape. Patent α ν s ν κ r c. 11 ε: 1. Procedure for laying socket pipelines in which socket and push-in pipe end are provided with matching seals, which by pouring a liquid, hardening Mass in annular spaces between the socket and the mandrel or between the plug-in pipe end and Hollow form are produced, characterized by the interaction of the following individual measures : a) when casting the sealing ring at the plug-in pipe end (6), a certain distance is maintained between the inner wall of the plug-in pipe end (6) and the inner wall of the hollow mold (a) at one point on the pipe circumference, b) when casting the sealing ring at the socket end of the pipe, a certain distance between the inner wall of the socket and the outer wall of the mandrel (b) is also maintained at one point on the pipe circumference, c) the two places where the distance measurements according to a) and, b) are complied with, are taken through appropriate measures on a common The surface line of the pipe wall is laid, with a label is attached to the outside of the pipe wall that is related to this surface line. 2. The method according to claim 1, characterized in that in the manufacture of the seal at the same time a flat bead (13) radially encompassing the pipe end at the plug-in pipe end (6) is generated on the face of the pipe. 3. Apparatus for performing the method according to claim 1 or 2, consisting of a hollow mold (α) for producing a conical seal on the outside of the plug-in pipe end (6) and a mold core (b) for producing a conical seal on the inner wall of the Pipe socket. 4. Apparatus according to claim 3, characterized in that the hollow shape (a ) carries an adjustable stop bracket (3). 5. Apparatus according to claim 3 or 4, characterized in that on the bottom of the hollow mold (α) a flat, elastic ring (5) with a smaller outer diameter than the lower inner diameter the hollow form is arranged. 6. Apparatus according to claim 3, characterized in that the mold core (b) has a stop projecting into the interior of the tube and a support or retaining bracket (11). Considered publications:
U.S. Patents Nos. 2,622,901, 2,517,778,
401 554. 1 sheet of drawings