SK33195A3 - Joint pipe - Google Patents

Abstract

The swivel connecting sleeve (1) of the conduit consists of two sections (1a,1b). The interacting swivel ball end also has two sections (2a,2b). The first section (1a) of the sleeve and second section (2b) of the ball end have a common internal and external radius and the second section (1b) of the sleeve and first section (2a) of the ball end have an equal internal and external radius. The sections with respective equal radii lie opposite each other and the internal faces of the sleeve sections and external faces of the ball end sections form slide surfaces.

Description

Articulated tube

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an articulated pipe for cable conduits or the like which is made up of individual pipes, the end pipes having a spigot or a plug end, and spherical joints composed of articulated spigots and hinged spheres are provided between the pipes. sealed with a sealing element arranged in the joint and joint.

BACKGROUND OF THE INVENTION

The installation of articulated pipes in cable ducting is recommended whenever these pipes are to be laid around obstructions or have to be arched for other reasons and the installation of manually preformed pipe bends is not possible due to their fixed dimensions.

For example, in DE-OS the hinge element for

The articulated tubes are known per se.

No. 26,704 (EP 86 11 03 14.1) discloses a conduit for routing cables which is made up of one pipe piece. the end of which is widened to the shape of a canopy, and into which a tubular piece is inserted, the end of which is slightly thickened according to said canopy extension and is slightly tapered from the inside out. In addition, a seal and a sleeve with a stop at the end of the canopy extension are provided in the joint area. A second stop is provided inside the heel of the canopy extension. However, the swivel ring cannot be used in arcs composed of several parts, because the central parts are provided on both sides with a collar with a larger outer diameter than the inner diameter of the swivel ring.

Another flexible pipe bend with an external reinforcement which is provided in the region of the throat and with an inner guide surface is known from DE-GM 92 16 784.5.

CH-PS 669 982 also discloses a tight joint device for cylindrical tubes, wherein two joint pieces formed at the beginning and at the end of each tubular piece, which are partially rounded and interfere with one another, form a ball joint. The articulated device, however, has the disadvantage of lesser tensile and flexural strength.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an articulated tube having a pressure-tight spherical connection for multi-part tubular elements and in which the articulation and the ball joints of the pipeline are disengaged, such as when pulled out, stressed when laying cables. is not possible and the articulated tube will have high strength against bending forces.

SUMMARY OF THE INVENTION

The articulated pipe for cable ducting or the like is assembled from individual pipes, the end pipes having a spigot or a plug end, and spherical joints composed of spigot joints and articulated spheres and pressure-tight are arranged between the pipes. sealed with a sealing element arranged in the region of the joint according to the invention. the essence is that the articulated throat has two different parts, the articulated spherical surface has two different parts, the radii of these parts are unequal, some parts have a common inner or outer radius, as some parts have the same inner or outer radius, the inner surfaces of the articulated socket portions and the outer surface of the articulated spherical portion are formed as sliding surfaces for the always opposite part, between the portions are formed as stops and a shoulder is provided between the tubular body and the part, and the articulated port and the articulated joint the spherical surface is intrinsically detached.

The advantages achieved by the invention are that strength

- in the bend of the articulated tube and thus of the entire part of the cable routing laid in an arc, it is considerably higher than the known articulated tubes and the articulation of the joint is limited by various stops. which represent the limit positions of the joint, to a safe extent, and further that the pipe connection in the joint is formed by a snap, i.e. it is non-detachable. It is not possible to release the hinge without breaking the parts. Finally, economical production and laying of these articulated arches is advantageous.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be illustrated by way of example with reference to the accompanying drawings, in which: FIG. 1 shows a longitudinal section through a pipe bend, FIG. 2 shows a longitudinal section through a joint in a straight condition, and FIG. 3 shows a longitudinal section through the joint in a deflected state.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1 shows a pipe bend composed of several tubes R1. R2, R3, the individual tubes R1,

R2, R3 are either provided with a normal neck on one side and a spherical articulated neck 1 on the one hand, or on the one hand a spherical articulated surface 2 on the one hand and a spherical articulated surface 2 on the other hand and as a pipe R3, which is, for example, a pipe R1 or a pipe R2 or is provided on one side with an articulated spherical surface 2 and on the other hand with a plug-in end.

The articulated throat 7 is divided into two parts 1a. 1b with a different inner radius r1, r2, the two parts 1a, 1b being separated by a shoulder 1c, which may be, for example, in the form of a ring or truncated cone. The shoulder 1c serves as a stop for a part 2b of the articulated spherical surface 2 having an outer radius r1. The articulated spherical surface 2 further has a shoulder 2c arranged between its two parts 2a, 2b, which simultaneously serve as a stop.

In the groove formed in the articulated spherical surface 2, a sealing ring 3 is inserted, which seals the articulated socket 1 in its part 1b having a smaller radius r2 relative to the part 2a of the articulated spherical surface 2 which also has a smaller radius r2. This 3 never leaves the outer radius r2, if necessary, during sliding movement of the articulated sphere 2 over the part 1b of the articulated neck 1 when it is deflected R2. permanent sealing effect. The deflection limitation is provided by both shoulders 1c, 2c between the portions of greater and lesser radius of the articulated neck 1 ^{and the} articulated spherical surface 2.

the sealing ring by its part 2a of the two tubes internally,

The R1 area with less of what is guaranteed

The plug end of the pipe R2 can be provided with a collar 2d under its articulated spherical surface 2. on which, when the tubes R1 and R2 are deflected relative to one another by their thickened edges 1 e, the end portion 1g of the hinge 1 engages.

When both tubes R1 are deflected. R2 or pipes R2 and R3, respectively, slide part 2a of pipe R2 over the inner part 1a and part 2b over the inner part 1b of the articulated neck 1, optionally up to the extreme position. wherein the movement of the two tubes R1, R2 is limited by shoulder 1c. Id the shoulder 2c encounters in its extreme position. The joint throat 1 and the joint spherical surface 2 have a common center Z around which the joint rotates. By matching the surfaces of the opposite spherical portions a-2b and 1b-2a of the two tubes R1 and R2, respectively the tubes R2 and R3, precise sliding, limiting their movement to the extreme angles and deflections and sealing them against each other are guaranteed. The thickened edge 1e, which is designed as thickened for strength reasons, abuts in this position on the shoulder 2d of the pipe R2. Figure 1 shows three tubes R1. R2, R3. of which the pipe R1 is the end pipe with a connection sleeve M for the other pipe without the joint of the cable guide. The number of tubes in the pipe bend depends on the radius and length of the bend. At least two pipes are required, which are articulated to each other by a joint neck i and a joint ball joint.

However, at least at least three tubes R1 are usually used. R2. R3, of which the middle tube R2 is provided on one side with a joint neck 1 and on the other side with a joint ball surface 2. Both end tubes R1. R 3 is then provided on one side with a conventional connection socket M or with a common plug end, which is not shown here.

The connection between the articulated socket 1 and the articulated ball surface is non-detachable after pushing the articulated ball surface 2 into the inlet cross-section of the articulated socket 1 and snapping the articulated ball surface part 2b into place. Releasing this connection is not possible without breaking the connected parts. The part 2b can also be formed, for example, as a split ring.

Claims (9)

PATENT 1. An articulated pipe for conduit or the like, which is made up of individual pipes, the end pipes having a spigot or a plug end, and spherical joints are provided between the spigot joints and the sealed seal, assembled by articulated spherical surfaces, and pressure-tightly by an element arranged in the region of the joint, i. the articulation (1) has two different parts (1a, 1b), ii. the articulated spherical surface (2) has two different parts (2a, 2b), iii. the radii (r1, r2) of these portions (1a, 1b) and (2a, 2b) are not the same, portions (1a) and (2b) share a common inner and outer radius (r1), respectively, as portions (1b) and (2a) ) have the same inner or outer radius (r2), iv. the parts (1a, 2b) and (1b, 2a) each having the same radii of the articulated throat (1) of the spherical surface (2) are opposed, in. the inner surfaces of the parts (1a, 1b) and the outer surfaces of the articulated parts (2a, 2b) are designed as sliding surfaces for the always opposite parts, vi. between the portions (1a, 1b) and (2a, 2b), shoulder (1c, 2c) are provided as stops, and a shoulder (ld) is provided between the tubular body (R1) and the part (1a), and vii. the articulated socket (1) and the articulated spherical surface (2) are detachably locked together. The articulated tube as claimed in claim 1, characterized in that the part (1a. 1b) of the articulated neck (1) is such that the part (1a) on the side of the tube emerging from the stop (1d) has a larger radius (rl). the part (1b) at the end of the articulated neck (1) has a smaller radius (r2). the articulated spherical surface (2a) of the plug tube (R2) has on the pipe side a portion (2a) with an outer contour corresponding to the inner contour of the part (1b), and an outer annular portion (2b) has an outer contour corresponding to the inner contour of the part (1a). the sliding movement of the joint in both end positions is limited by stops (1c, 1d) for the annular portion (2b) of the hinged spherical surface (2). An articulated tube according to claim 1 and 2, characterized in that the shoulder (1c) is annular. The articulated tube according to claims 1 to 3, characterized in that the shoulder (1c) has the shape of a truncated cone. The articulated tube according to claims 1 to 4, characterized in that a stop (2d) for the end portion (1g) with a thickened edge (1e) of the articulated socket (1) of the tube (R1) is provided at the male pipe end (R2). The articulated tube according to claims 1 to 5, characterized in that the inside diameter (D2) and at the diameter (D1) equals the maximum deflection of the pipe (R1) relative to the deflection and the plug-in pipe end (R2). (c) results in an inner sheath of the articulated spherical surface (2a) of the inner sheath line of the pipe (R1). The articulated tube according to claims 1 to 6, characterized in that the annular portion of the surface (2) slides along the inner contour of the articulated socket (1) and the cup-shaped articulated ball line when the (1d) is fitted to the articulated ball interior. (1a) the surface (2a) slides along the inner contour of the outer portion (1b) of the hinge (1). The articulated tube according to claims 1 to 7, characterized in that its parts are made of plastic resiliently within certain limits, and that the articulated spherical surface (2) and the articulated socket (1) are non-detachably connected to each other by snapping. wherein at least the outer diameter of the inlet cross-section (If) of the articulated throat (1) is slightly smaller than the diameter of the articulated spherical surface (2) and the part (2b) of the articulated spherical surface (2) engages behind the shoulder (1c). An articulated tube according to claims 1 to 8, characterized in that a part (2b) of the articulated spherical surface (2) is formed as a split ring. The articulated tube according to claims 1 to 3, characterized in that the shoulder (1c) is designed as a split ring. List of reference marks hinge 1 part la. 1b shoulder lc, ld edge le inlet cross section lf end portion lg reinforced edge le hinge spherical surface 2 part 2a. 2b shoulder 2c collar 2d sealing ring 3 radius r1. r2 inside diameter D1, D2 pipe R1, R2, R3 center Z angle rf deflection of the connection sleeve M