Background of the Invention Examples of flexible multi-duct conduit assemblies are known as disclosed in U. S. Patent No 5,463, 187, wherein individual conduit sections are interconnected by means of a connecting system fitted with a cylindrical coupler insertible into outside conduit casing as well as with a sealing and clamping gasket disposed outside of the external conduit casing. In the coupler, there are axial through bores to receive internal ends of ducts for transmission conduit and, by the same token, to align their position inside conduit casing. The same bores feature sealing members for conduit ducts.

Furthermore, a multi-duct conduit connector assembly is known from the US Patent RE. 34,332 description. According to said invention, the connecting assembly features a coupler with bores adapted to receive on both sides the ends of internal conduit ducts. On the external surface, the coupler features a circumferential ring substantially at the half height of the coupler, such ring retaining the position of the coupler in end-to-end relationship, wherein one of the two interconnected conduit sections is flare-shaped. Alike design is disclosed in the US Patent No 5,236, 227. According to this invention, the cylindrical body portion receives a plate with bores corresponding to those in the coupler. Around each of the bores, there are slanting ports to facilitate placement of duct sections into coupler openings.

A shortcoming of such developments is in the first the highly labor-consuming efforts associated with joining conduit sections at the job site.

Summary of the Invention The invention is designed to develop a multi-duct conduit assembly of relatively simple design to facilitate quick, durable and effective joining of adjacent conduit sections while providing joint tightness.

The solution according to the invention is characterized by the fact that the assembly to interconnect multi-duct conduit modules, wherein inside the external casing there are ducts for transmission lines, is designed as two couplers permanently seated into conduit module ends and separately matable. The connectors to integrate assembly couplers are placed inside collars rigidly fixed in the frontal areas of each coupler body. In corresponding axial bores made in couplers there are duct sections disposed, wherein inside each bore of the coupler bodies there is a retention member to stabilize the position of duct ends on the one end and duct sections on the other end.

Furthermore, circumferential sealings of such ducts surround both sides of the retention member.

Suitable fabricated collars are attached to frontal surfaces of the coupler bodies in a separable way, while opposite to the collars, each coupler features a pressure ring mounted to the body equally in a rigid and separable way. Sealing elements to seal both ducts and external casing are disposed between coupler body on the one hand and the pressure ring on the other hand.

It is equally suitable where both collars and pressure rings on the other hand are mounted to frontal surfaces of the coupler bodies in an inseparable manner, while sealing elements to seal both ducts and external casing are placed between the body on the one hand and the pressure ring on the other hand.

In order to seal the space inside the external casing in a best possible way it is preferable that sealing elements of each coupler are shaped as flat gasket, wherein openings are made to correspond to the position of the axial bores in the coupler. At least one sealing gasket features on its external circumference a tongue showing towards the collar, while circumferential tongues surround each opening in the sealing gasket. Such tongues made around gasket openings situated between the body part and the collar as well as the tongues around the openings of the sealing gasket situated between the body part and the pressure ring in one coupler are directed inwardly to each other.

To facilitate manufacturing of the elements, both couplers of the coupling assembly including collars are identical.

In addition, to facilitate the assembly work the collars of the coupling assembly feature at least one guiding member to align their mutual clear position in the coupled condition.

To maximize the conduit internal space sealing a frontal sealing gasket is suggested to be located between coupler collars in the coupled condition.

Further, for easy and quick assembly of the conduit modules it is advisable for the couplers integrating the connector assembly components to be designed as a quick-closing apparatus.

According to said design, the most suitable format of a quick- closing connection is by snap locking.

To facilitate joining, it is suggested that each locking member on one collar has a corresponding form fit at the other collar.

With such design, locking members and form fits are positioned in the rim area of the collar in a uniform way, thus providing an optimum distribution of coupler connecting forces.

It is also advisable that at least one locking member and correlative form fit are marked.

In case of a design where the connector assembly coupler is jointed with the collar and the pressure ring in a separable manner, bolting, preferably by screws, is the easiest and most efficient jointing method.

In case of a design where the connector assembly coupler is jointed with the collar and the pressure ring in an inseparable manner, welding components together represents the easiest and most secure way to be established.

The ducts and the sections thereof shall be individually marked for a clear identification of such ducts.

An additional advantage is obtained when the external casing of the conduit module is fitted with a flared tip on both ends, thus providing for an effective placement therein of the coupler.

To provide high durability of the conduit, the external casing of each conduit modules is shaped as double-walled corrugated tube.

It is likewise advisable that retention members positioned in axial bores of the couplers are shaped as circumferential tongues.

On account of the cross-section of the conduit being best possibly utilized, there are seven ducts disposed inside external casing, wherein six of them are disposed symmetrically on the circumference, while one is disposed centrally.

The substantial advantage of the invention is associated with the interconnecting facility for individual conduit sections in a quick and durable way. Modules of such conduit are delivered to the job site with coupling elements being permanently inserted in the ends thereof and interconnection adjacent conduit modules is done by disposing corresponding duct sections in coupler openings and by providing an end-to-end relationship of the conduit ends with subsequently mating by means of a quick-closing connector. Applying conduit duct sections to provide continuity thereof in the assembly body area results in none of the duct members inside the external casing protruding from the module during transportation and storage, thus preventing any damages. In addition, suggested design of the assembly and its modules provides for simultaneous assembly of the whole of the multi-duct conduit at the job site without necessity to pull ducts to the external casing. Applied sealing provides effective means of protection against any external impact on ducts disposed inside the system. The design of the connecting assembly as well as the continuity and integrity of ducts secure, too, that there is a possibility to mechanically and pneumatically pulling said lines to said ducts for quite large distances.

Brief Description of the Drawings The invention is shown schematically as an example, where Fig. 1 shows the view of one of the couplers from the collar side, and Fig. 2 shows A-A longitudinal cross-section through the connecting assembly in a coupled state.

Detailed Description of the Preferred Embodiments The body part 1 is designed to permanently couple and seal the inside of two adjacent modules 2'and 2"of the multi-duct conduit. Single module 2'of the conduit has an external casing 3 shaped as double-walled externally corrugated tube 4. Each module 2', 2"has on its both ends a flared tip 5. The body part 1 features two identical couplers 6'and 6"which are permanently pressure-inserted in flared tips 5 of modules 2'and 2". Each of the couplers 6', 6"has a cylindrical body 7, wherein there are seven axial bores 8 made, whereas one of the bores 8 is positioned centrally and six remaining ones are disposed consistently around the central bore.

A different number of bores 8 as well as variational disposal of such bores 8 purport to the invention scope. Each bore 8 incorporates a circumferential tongue 9, the function of which is to align and retain the positions of duct ends 10. The distribution of bores 8 of the coupler 6 fixes the situation of such ducts 10 inside the external casing 3 of the conduit. Screws 11 fix the pressure ring 12 with bores 13 identically disposed as the coupler 6 to the body part 7 of the coupler 6 from the module side 2. On the other end, the body 7 of the coupler 6 is jointed by screws 14 to the collar 15 where bores 16 are disposed identically, too. With a different design, not shown in the picture, an inseparable connection is possible between the body part 7 of the coupler 6 and the pressure ring 12 and the collar 15, for instance by welding together individual components. In such a design, the coupler features several tongues on its frontal surfaces, which, upon being disposed in corresponding attachment openings made in the collar and pressure ring, are welded together, thus providing a durable and inseparable joint. Between the body 7 of the coupler 6 and the pressure ring 12 on the one side and the collar 15 on the other side, there are flat gaskets 17 and 18 disposed. Each gasket 17 and 18 has around its external rims a circumferential tongue 19 directed towards the collar 15. It is, however, permissible that only one of the gaskets 17 or 18 feature the tongue 19. Additionally, each gasket 17 and 18 features openings 20, situated identically to as bores 8 of the coupler 6 and bores 13 of the pressure ring 12 and bores 16 of the collar 15. Around each opening 20, the gasket 17 disposed between the body 7 and the pressure ring 12 has circumferential tongues 21 directed towards the collar 15, while the gasket 18 located between the body 7 and the collar 15 has around each of the opening 20 circumferential tongues 22 directed towards the pressure ring 12.

Inwardly directed duct ends 10 in two adjacent modules 2' and 2"of the conduit in a permanent placement of the couplers 6' and 6"of the assembly 1 in flared ends 5 of the conduit are leaned against circumferential tongues 9 in bores 8 and sealed by tongues 21 of sealing members 17. Between surfaces 23 of tongues 9 in bores 8 of the couplers 6'and 6", sections 24 of ducts 10 are disposed to be sealed with tongues 22 around openings 20 of gaskets 18. Sections 24 provide continuity of ducts 10 along the line, so the cables laid in such ducts are effectively protected against ambient conditions.

In the rim area 25 of each collar 15 of the couplers 6'and 6" of the assembly 1, quick-closing connector 26 is placed designed as three snap locking members 26'spaced at 120° each. In addition, each collar 15 accommodates three from fits 27 also spaced at 120° each, while locking members 26'and form fits 27 are spaced uniformly at 60°. Form fits 27 facilitate mating couplers 6'and 6"with their angular displacement by 60°. In the mated position of couplers 6' and 6"of the assembly 1, the attachment points 28 of locking members 26'of the coupler 6'lean against opposite surface 29 of the collar 15 of the coupler 6", while attachment points 28 of locking members 26'of the coupler 6"lean against opposite surface 29 of the collar 15 of the coupler 6'. Thereby, the engagement of couplers 6' and 6"of the assembly 1 is durable and tight. There is an additional possibility to seal the connecting assembly 1 by placing a flat gasket with suitably arranged openings or a sealing ring between collars 15 of couplers 6'and 6" ; however, such is not shown in the picture.

In order to facilitate erection of the connecting assembly 1 and identify ducts 10 with longer distances, each duct 10 and corresponding sections 24 of ducts 10 feature a different marking, for instance differently colored strips; it is, however, not depicted in the picture. Furthermore, in the area of one of the locking members 26' and corresponding form fit 27 markings 30 are disposed. It is also possible, which is not shown in the picture either, that correlative collars 15 be equipped with a guiding component, for instance tongue and groove, thus defining their position to each other in the mated condition.

The above detailed description has been provided for better understanding of the invention only, and for those skilled in the art it is obvious that various modifications and alternations may be made to the preferred embodiment without departing from the intended spirit and scope of the invention, and it is intended that such modifications and alternations are included within the scope of the following claims.