DE8603940U1 - In particular, for guiding a gaseous or liquid flow medium, for example - Google Patents

Description

38 ·. January 1986 G 9746 - les

F e s t ο KG, 7300 Esslingen.

In particular, for carrying a gaseous or liquid flow medium, for example

The invention relates to a particular one for guiding a fs. B. gaseous or liquid flow medium serving Pipe.

Pneumatics or hydraulics are often used as pressure medium lines for guiding the respective flow medium llohre used. This is especially true when the flow medium occurs under high pressure, because the pipes are usually made of relatively rigid, stiff material, ft. B. metal, and thus also withstand high internal pressures fctand. The disadvantage of using rigid pipes is However, the great amount of work and time required to lay the pipes, as the pipe run is not straight through Labor-intensive interconnection of fittings such as bends, angles, twisting or due to the pipe strength negatively influencing local heating and subsequent bending of the pipe can be realized. Angled or bent Rohrv arlaufe are, however, for reasons of Saving of space, especially with hydraulic or pneumatic

operable systems the rule / so that their assembly requires an enormous amount of time, which the entire system does not insignificantly expensive. In principle, the pipes could also be bent without being heated, but this does arise regularly a kinked part that can result in leaks or at least a disruptive reduction in the Flow cross section caused.

Admittedly, they have already been through a metal mesh proposed surrounded rubber hoses for flow guidance, but these have by far not the strength of In addition, pipes and tubes are not resistant to many flow media, which leads to rapid wear and tear of these Tubing leads *

It is the object of the invention to remedy the above disadvantages and a pipe according to the type mentioned to create that is easy to lay with simple and inexpensive production and with which in particular pipe connections, which prescribe a flow path deviating from the straight line in a simple, time-saving way and can be produced tightly.

The above object is achieved in that the tube has at least one flexible or resilient bending section has, which in each case between two in the pipe longitudinal direction successive, substantially straight pipe length sections is arranged and forming a joint-like connection with these in one piece

is trained. Advantageously, there is now a pipe that can withstand high pressures and is located in the area its at least one bending section can be bent at will without causing kinks, the leaks or cause disturbances in the flow of the medium being carried. This allows that to be done conveniently with several arranged one after the other in the longitudinal direction of the pipe Pipe provided with bent sections when it is laid to adapt to externally specified local Conditions can be bent in a simple manner without the need for separate fittings such as angles or Arches or the like would be required. The laying work can also be carried out in confined spaces very simple and time-saving, which in particular also simplifies the assembly of pneumatically or hydraulically controlled Systems allows in which usually a large number of pipelines in a very confined space nooks and crannies to be accommodated. In addition, the pipe is tight at all times because of the bending sections Form a piece with the pipe lengths in between so that no sealing points occur. Furthermore, the pipe according to the invention can advantageously Use it several times and at different locations, as the tube is in the area of the bend * - '> cuts can be bent back / that is not restricted to a specific bending position is. The pipe according to the invention is still simple and Can be produced inexpensively / preferably as cut-to-length goods by the meter.

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Advantageous further developments of the invention are listed in the subclaims.

Preferably, the tube is consecutive in the longitudinal direction of the tube spaced apart bending sections | te, between which a two bending sections at the same time associated pipe length section is arranged and wherein the bending sections preferably along the Are evenly distributed in the longitudinal direction of the pipe. The straight pipe in the initial state can thereby be attached to the respective The point of need can simply be turned off. The individual bending sections preferably each have a smaller axial one Length than the individual pipe length sections, so that they actually form joints around the adjoining ones straight pipe length sections are pivotable. The pipe length sections expediently consist of relatively | rigid or rigid material, e.g. B. hard plastic or metal such as stainless steel, in particular the latter ensures that the pipe is practically completely insensitive to the respective flow medium. In addition, a pipe according to this embodiment can be used particularly advantageously when components how cylinders, valves or the like are to be connected, the housing or connection points of which are also made of stainless steel exist.

The development according to claim 8 facilitates the manufacture of the pipe.

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The developments according to claims 9 to 12 allow a particularly wear-free bending process in the area the bending sections and allow frequent bending without damaging the pipe. Furthermore, in particular In this embodiment, bends with a very large bending angle are also possible without the flow cross-section in the area of the bend sections being changed. It is also possible, by means of a corresponding bending process, to cut the length of pipe sections separated by a bending section to be arranged so that their two longitudinal axes ^ parallel ur.d run at a distance from one another, are offset in parallel, as it were

Preferably, the tube is particularly plastically bendable in the area of the bent sections, so that the individual Bending processes can be carried out essentially without springback, and the tube can also be carried out without the action of external forces remains in the respective bending position. The pipe length sections bent against each other thus remain in the respective Angular position to each other.

The invention is explained in more detail below with reference to the accompanying drawing. In this show:

1 shows a longitudinal section through a first design of the pipe according to the invention and

2 shows a side view of the pipe according to the invention, with (a) showing the pipe in the unbent initial state and (b) showing the pipe in the area · !! · : '.'. "" ■ ^":::" - 6 -

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the bent sections bent state.

The tube 5 shown in the drawing serves as a pressure medium line for guiding a gaseous or liquid flow medium, e.g. B. compressed air or a hydraulic medium such as oil. It is preferably used in pneumatically or hydraulically operated systems in order to provide connections there Valves, cylinders, pumps or the like. Manufacture.

In the case of the systems mentioned, the specification sheet usually means that the pressure medium lines are arranged in a space-saving manner specified in order to obtain a compact overall system. So there must be a large number of pressure medium lines in a very small space be accommodated. However, this requires, especially to avoid overlaps, The individual pressure medium lines often have to be bent. Such systems are usually added to this operated with high flow medium pressure, see that the pressure medium lines withstand high pressure loads have to. The invention provides a pipe that is easy to lay under all circumstances and that also has high internal pressure has grown.

According to the invention has the tube 5 at least one bending section flexibly or resiliently formed 6, the successive between two pipe in the longitudinal direction 7, the linear length of pipe sections 8/8 ¹ is arranged. This at least one bending section 6 practically provides an articulated connection between the two pipe length sections

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8, 8 'and is with both the one and the other length section formed in one piece and in one piece.

In the exemplary embodiment, the tube 5 has several in the longitudinal direction 7 of the tube in succession and at a distance mutually arranged bending sections 6, and between each two in the longitudinal direction 7 adjacent bending sections

6 there is a common pipe length section 8 or 8 which determines the distance between the two sections.

8 ¹ . The tube length section arranged between two respective bending sections 6 is designed in one piece with the bending sections 6 delimiting it, and the entire tube 5 forms a single, one-piece component.

Advantageously, the tube 5 is now in the longitudinal direction

7 seen alternating in rigid, stiff sections 8,

8 'and divided into flexible sections 6, and in the initial state, which is shown in FIGS. 1 and 2a, the tube 5 has a straight shape with a linear longitudinal axis 7. , 8 ¹ have high strength in the radial direction. However, the respective adjacent pipe sections 8, 8 ¹ is bent with a relatively small force in the area of the region enclosed by them bending portion 6 against each other, so that these two pipe lengths 8, 8 ¹ an angle 180 ° to include more or less than one another or offset in parallel to one another are. Reference is made here to FIG. 2b, which will be explained later.

The pipe 5 according to the invention is therefore very easy to lay, and without coupling parts, e.g. B. arches, angles or the like. Are required, can quickly and without damaging the Pipe a non-linear pipe run can be specified. In addition, since the tube is in one piece, none of them occur Sealing problems. Advantageously, the bending sections are ^ te 6 arranged evenly distributed in the pipe longitudinal direction 7, and they each have in comparison to the individual straight pipe length sections 8, 8 'have a smaller axial length, so that the pipe a plurality of joints having. The length of the individual pipe length sections 8, 8 'is preferably in the range between 2 and 10 cm, so that tight pipe bends can also be carried out

are.

The pipe according to the invention can be produced easily and preferably by the meter and is preferably provided in different types, the pipe types having different length dimensions with respect to the pipe length sections 8, 8 ¹ , but the pipe length sections of each individual pipe being the same length. Depending on requirements, such a pipe can be used with the desired pipe length section dimensions. In addition, however, it is also possible to make the pipes to measure and only pre-bend bent sections at the required points.

see.

In the exemplary embodiment, the bending sections 6 are special advantageously designed and each close in one piece

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on the facing axial end region 10/10 'of the adjacent tubular sections 8 _} 8'. The bending sections 6 each form a tube wall section 9 which is completely closed in the circumferential direction of the tube 5 and is relatively rigid in the radial direction, so that a flow channel 14 with an essentially constant flow cross section is present in the interior of the tube 5. Each bending section 6 is preferably designed as shown / in the form of a bellows, the individual folds 15 of which run in the circumferential direction of the tube 5 and are arranged one after the other in the longitudinal direction 7, whereby they are at least in the straight initial state of the tube 5

coaxially to the individual pipe length sections 8, 8 'angeord-I
! are net. The one formed by the bellows-like bent section

Pipe wall section 9 has in cross section, i.

in the longitudinal section of the pipe, a wave-shaped or serrated shape

or meandering course, so that each successive pipe length sections 8, 8 ¹ can be moved away from one another or towards one another by axially expanding or compressing the respective pipe wall section 9.

The bending sections 6 are expediently made in each case of several ring elements 16, 16 'arranged one after the other and coaxially to one another in the longitudinal direction 7 of the pipe, adjacent ring elements 16, 16 'alternating in the area to form the bellows-like bending section its outer circumference 17 and its inner circumference 18 in one piece are connected to each other. The bellows body is therefore preferably also in one piece.

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Referring to Fig. 2b, let the pipe according to the invention be 5 described below in the bent state. One recognizes three bending sections arranged one after the other in the longitudinal direction of the pipe 6 / which hereinafter, seen from left to right, is referred to as the first, second and third bending section should be.

In the area of the first bending section, the two adjacent pipe lengths 8, 'only small angled against each other fügig, while a strong bend was made in the region of the third bending portion, so that there the longitudinal axes 7' 8, 7 ^'1 of the adjacent pipe length portions substantially perpendicular to each other stand. However, both bending sections have in common that the part 19 of their pipe wall section 9 pointing in the bending direction is compressed, while the opposite part 20 has undergone a widening. In the area of the part 19, the ring elements 16, 16 ′ are therefore very close to one another, while they are spread apart in the area of the part 20.

The second bending section 6 is bent in such a way that the longitudinal axes T, 7 ^{111 of} the adjacent tube length _{sections 8 r} 8 'are arranged parallel and at a distance from one another, the two sections 8, 8 ¹ are thus offset parallel to one another. This is achieved by bending the bending section 6 in itself, so that the bellows body, viewed in the longitudinal direction of the tube 5, is initially bent in one direction and then in the opposite direction. .. - ..... ,,,,

Since the ring elements 16, 16 'in their inner diameter preferably correspond to the inner diameter of the pipe length sections 8, 8 ', is in each bending position an undisturbed flow of the flow medium is guaranteed. All bending processes can be carried out without kinks, se that damage to the pipe is practically impossible.

A particular advantage of the tube 5 according to the invention lies in that the bending portions are plastically bendable, d. i.e. when using bellows-like bent sections the expansion or compression of the individual ring elements essentially through plastic deformation at the transition points. This facilitates the handling of the pipe considerably, since it practically remains in the respective bent position and does not spring back. No further external force is therefore required after a bending process. to maintain the desired shape of the pipe.

The tube according to the invention preferably consists of one single material. This material can be, for example, a relatively hard, high-pressure-resistant plastic material, or it can be preferred stainless metal such as stainless steel. The latter guarantees practically complete insensitivity to the respective Flow medium with simultaneously · - · 'high load capacity. This variant is used to advantage in particular when / when cylinders or valves are to be connected or the like. Also consist of stainless metal, so that corrosion-promoting joints between different

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i borrowed precious metals can be avoided.

To connect the pipe 5 according to the invention to structural elements, it is provided that the axial end sections of the pipe are each designed as pipe length sections 8, 8 ¹ , so that the pipe can be connected easily and sealed by means of commercially available screw connections.

The pipe according to the invention is manufactured, for example wise by inserting a tube with no bendable section into a Form is inserted, which is provided with the negatives of the Biegeabschnit te, after which the tube is subjected to internal pressure is so that the pipe wall forming the bellows-like Bend sections bulged outwards.

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Claims (14)

^ Β * January 1986 G 9746 - les F e s t ο KG, 7300 Esslingen. In particular, for leading a z. B. gaseous or liquid flow medium serving pipe claims 1. In particular, for leading a z. B. gaseous or liquid flow medium serving pipe, characterized in that it has at least one flexible or resilient bending section (6), each between z'W2i in the pipe longitudinal direction (7 - 7 ¹¹¹ ) successive, essentially straight pipe length sections ( 8, 8 ') and is formed in one piece with each of them, forming a joint-like connection. 2. Pipe according to claim 1, characterized in that it has several in the pipe longitudinal direction (7 - 7 ^'11 ) successive and spaced apart bending sections (6) »wherein between each two adjacent bending sections (6) in the longitudinal direction a common, a substantially straight pipe length section (8, 8 ') is arranged, which forms one piece with both bending sections (6) « * t ■ • «ti t 3. Pipe according to claim 1 or 2, characterized in that a plurality of bending sections (6) is arranged evenly distributed ^{in the pipe longitudinal direction (7-7 111).} 4. Ronr according to one of claims 1 to 3, characterized in that the individual bending sections (6) each have a smaller axial length than the individual tube length sections (8, 8 ¹ ) · 5. Pipe according to one of claims 1 to 4, characterized in that the pipe length sections (8, 8 ¹ ) consist of relatively rigid or stiff material. 6. Pipe according to claim 5, characterized in that the pipe length sections (8, 8 ') and / or the at least a bending section (6) made of metal, expediently non-rusting metal such as stainless steel. 7. Pipe according to claim 5, characterized in that the pipe length sections (8, 8 ¹ ) and / or the at least one bending section (6) consist of plastic material. 8. Tube according to one of claims 1 to 7, characterized in that the at least one bending section (6) and the pipe length sections (8, 8 ') made of iuentic material exist. 9. Tube according to one of claims 1 to 8, characterized / that the at least one bending section (6) has a • I * «« ■ * ■ 1 ** · in the circumferential direction of the pipe (5) completely closed / in the radial direction relatively stiff pipe wall section (9) forms. 10. Pipe according to one of claims 1 to 9, characterized / that the at least one bending section (6) in the form of a raiten bellows with in the circumferential direction of the pipe (5) extending and in the pipe longitudinal direction (7-7 ¹ ' ¹ ) successively arranged folds (15) or beads is formed. 11. Pipe according to one of claims 1 to 10, characterized in that the at least one bending section (6) consists of several, in the pipe longitudinal direction ( ^{7-7 '11} J successively and coaxially arranged to each other, appropriately metallic ring elements (16, 16') ), with adjacent ring elements (16, 16 ') alternating in the area of their outer circumference, forming a bellows body (17) and its inner circumference (18) are integrally formed with one another. 12. Pipe according to claim 11, characterized in that the inner diameter of the ring elements (16 _f 16 ') corresponds to the inner diameter of the pipe length sections (8,8'). 13. Pipe according to one of claims 10 to 12, characterized characterized in that the pipe wall in the area (9) of the at least one bending section (6) has a corrugated cross-section or has jagged or meandering shape. 14. Pipe according to one of claims 1 to 13, characterized in that that the bending sections (6) can be bent plastically.