DE102010014454A1 - Annular pressure container i.e. overpressure container for electric cable, has sensor assigned to detour ring for detection of tensile strain influencing deflection of strand-like product at detour ring - Google Patents

Abstract

The container (1) has an intake port (3) comprising an intake terminal (4), and an exhaust opening (5) comprising an outlet port (6), where the container receives a rotatably movable detour ring (7) for a strand-like product e.g. electric cable, in interior. A lid-like upper part and a lower part (2) are detachably and sealably connected with each other by a fixing unit along a division plane. A sensor (12) is assigned to the detour ring for detection of tensile strain influencing deflection of a strand-like product at the detour ring. An independent claim is also included for a device for the continuous production of casings for a strand-like product.

Description

The invention relates to an annular pressure vessel having an inlet port having an inlet opening and an outlet port having an outlet opening, wherein the pressure vessel is designed as a pressure vessel and receives in its interior a rotatable deflection ring for a stranded product to be deflected, wherein a lid-like upper part and a lower part of the Pressure vessel releasably connected by means of a fixing means along a dividing plane transverse to a rotation axis.

As a heating and cooling means for a rubber or the like encased, elongated product so-called catenary CV systems are known and in use, in which the coated product, such as electrical cables or lines, immediately after applying the insulation in an extruder in Shape of a chain line hanging substantially free and then guided in a straight line. If it is the vulcanization or crosslinking of the casing, determines the shape of the heating zone formed in the case of heating the approximately horizontally guiding the coated material formed chain line. However, a sufficiently long, arranged in catenary heating zone leads to a very high-altitude extruder.

According to the DE 21 10 365 A1 is composed of the chain line and the straight line heating and / or cooling section divided by an increase. Such a defined subdivision of heating or cooling sections allows precise control of the individual heating or cooling zones. The increase can be used simultaneously for deflecting the encased goods, for example by 180 °.

A device with a deflection is for example also from the DE 28 03 964 A1 known. in this publication, a so-called vertical CV system is described, which should avoid undesirable deformation after the extrusion process by the weight of the material, especially in the production of, for example, electrical high voltage cables with thicker Isolierwandstärken. The entire pipe section has a first heating section, in which a cross-linking of the material of the cable sheath takes place, and a subsequent cooling section, from which the sheath is introduced into a deflection container.

The DE 10 2008 029 167 A1 relates to a device for the continuous production of casings for elongate material, such as electrical cables and pipes, pipes and profiles, with a pressurized pipe section and a following on the pipe section, pressurized deflection container, in which the envelope from its predetermined by the pipe section Direction is deflected by means of a deflecting device. In order to provide a particularly compact deflection container, the deflection device comprises a plurality of rollers, which are arranged on a cam corresponding to the deflection angle of the envelope and are directly or indirectly via a guided over the rollers conveying means in contact with the enclosure. It is therefore dispensed with a guide wheel, so that only a plurality of rollers are used as a deflection, which form a desired deflection angle corresponding cam track for the envelope to be deflected.

In the DE 24 44 952 A1 crosslinkable materials are applied to the vertically upwardly removed material and cooled immediately thereafter to form a stable insulation, the good is deflected in the downward direction and subjected to a heat treatment to crosslink the enclosure. The deflection can be done, for example, in a known deflection, which is filled as well as the arrangement used as a heat treatment zone with superheated steam.

The DE 26 26 721 A1 as well as the DE 37 01 392 A1 each relate to an arrangement for the continuous production of coatings of thermoplastics, elastomers or thermoplastic rubbers for stranded Good. The sealing of the input-side end of a Vulkanisierstrecke, which is under pressure, by means of a so-called telescopic tube, which establishes the direct connection to the extruder outlet. In order to be largely independent of the manufacturing tolerances, a barrier liquid is arranged at the input end of the guide tube, which merges continuously into the tempering zone. So that barrier liquid can be transferred continuously into the actual tempering zone of the guide tube, the part of the guide tube containing the barrier liquid ends in or on a deflection container.

This always ensures the continuous transition between the barrier fluid and the temperature control medium in the region of the guide tube.

It proves to be disadvantageous in practice that unnoticed in connection with the deflection, an increased tensile load of the strand-shaped product can occur, which can have an effect on the respective properties. In particular, an unacceptably high tensile load can lead to damage to the product.

One might think of putting the tensile load in a mathematical relation to the character of the chain line of the product so far hanging freely in the CV-plant, in order thus on the To be able to shoot tensile load. However, this approach has proven to be difficult to implement in practice.

The invention is therefore based on the object to provide a way to continuously detect the tensile load. In particular, measures to promptly compensate for unduly high, but also low, tensile loads should be introduced and any affected sections of the product should become identifiable.

This object is achieved with a pressure vessel and with a device according to the features of the independent claims. The further embodiment of the invention can be found in the dependent claims.

According to the invention, therefore, a pressure vessel is provided, which is equipped with a deflection ring associated sensor for detecting a caused by the deflection of the product on the deflection ring tensile load on the deflection ring. As a result, a direct detection of the tensile load of the product, such as a cable, is made possible directly on the deflection of the deflecting ring in a surprisingly simple manner. Possible quality fluctuations can thus be reduced to a minimum and, in particular, deviations occurring can be clearly assigned to the relevant section of the product. in contrast to the devices known from the prior art, the pressure vessel according to the invention allows for the first time a monitoring and detection of the product in operation within the pressurized pressure vessel. The pressure vessel is suitable both for continuous vulcanization in a chain line arrangement (CCV) as well as in a vertical arrangement (VCV) for the processing preferably of polymeric plastics, such as crosslinked polyethylene, or rubber.

The tensile load could be measured without contact. By contrast, an embodiment of the invention in which the sensor has a contact body designed as a rolling body or sliding body which abuts against an inner circumferential surface and / or outer peripheral surface of the deflecting ring is particularly simple. As a result, the load of the deflecting ring is detected directly on the deflection ring, against which the contact body rests force, shape or frictional engagement. At the same time, in particular in conjunction with a rolling body, a position determination can be carried out, so that at the same time an angular position of the deflection ring is detected.

It also proves to be particularly practical if the contact body is biased by a spring element relative to the deflection ring, so that a displacement of the deflection ring leads to a change in shape of the spring element, which can be detected by the sensor. For this purpose, the spring element can be designed, for example, as a helical spring, spiral spring or leaf spring. Furthermore, the spring element may be designed as a compression spring or a tension spring or have an adjustable bias.

In another, also particularly useful modification of the invention, the contact body is designed as a relative to the deflection ring in particular radially movable guide roller. As a result, the contact body during operation serves at the same time as a bearing of the deflecting ring in that it is designed, for example, as a contoured guide roller or as a ball. The leadership replaced so far at least some of the guide rollers of the deflection ring, where appropriate, guides serve as a stop for a maximum radial deflection of the deflection ring.

Furthermore, it proves to be particularly profitable if the sensor has a pressure measuring sensor. As a result, the load acting on the contact body from the deflection ring can be detected as a force application independently of a displacement of the deflection ring. A radial displacement for detecting the tensile load is eliminated.

In another, particularly practical modification of the invention, in which the sensor is arranged in the region of a geometric center of the deflecting ring between the inlet port and the outlet port, the bearing support may be limited to the contact between the deflecting ring and the preferably designed as a rolling body contact body, so the measured values of the sensor are not influenced by further guides. Rather, the storage of the deflection ring is substantially simplified by a single support point in operation, with additional guides only serve to limit the radial displacement of the support ring and a defined position at a break in the strand-shaped product or the tensile load.

Another, likewise particularly expedient invention is then achieved in a pressure vessel having an inlet connection having an inlet opening and an outlet connection having an outlet opening, in which a lid-like upper part and a lower part of the pressure vessel are releasably connected by means of a fixing means along a dividing plane transverse to a rotation axis if the fixing agent at least one, Preferably, a plurality of distributed on the inner circumference and / or on the outer circumference of the pressure vessel arranged, in a first relative angular position of the upper part relative to the lower part releasing and undercut in a second angular position formations. As a result, the sealing fixation of the upper part on the lower part is not effected by a plurality of screw connections respectively on the inner circumference and on the outer circumference, but similar to a bayonet closure by a frictional connection or by a mere undercut without a frictional connection by means of a relative rotation of the upper part relative to the lower part , In this case, the respective formations of the upper part and the lower part undercut, wherein the contact surfaces are preferably inclined for non-positive fixing, that a the upper part against the lower part spanning and the seal determining force can be adjusted by the angular position accordingly. To adjust serve one or more adjusting means, such as hydraulic cylinders. In a simple embodiment, the upper part is designed as a substantially U-shaped cover, which encloses the lower part on the inner circumference and on the outer circumference and whose legs carry the respective formations. As a result, rapid accessibility for cleaning, maintenance and set-up purposes is achieved, and realized by the annular design at the same time a small volume of the pressure vessel, which is thereby space-saving and economical with respect to the pressure medium and has a low weight.

The object is achieved according to the invention with a device for the continuous production of sheaths for a strand-shaped product with an annular pressure vessel, wherein the pressure vessel is designed as part of a CV system and a spray head and intended for example for the insulation and sheathing of cables and lines.

The invention allows for various embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in

1 a plan view of a pressure vessel according to the invention with a sensor;

2 an enlarged view of a sensor having the region of in 1 shown pressure vessel;

3 a sectional side view of the in the 1 and 2 shown pressure vessel;

4 an enlarged view of a peripheral portion of the in 3 shown pressure vessel in an unlocked position;

5 an enlarged view of a peripheral portion of the in 3 shown pressure vessel in a locked operating position.

1 shows a plan view of a pressure vessel according to the invention 1 , in which for clarity only the opened lower part 2 is shown. The designed as a pressure vessel annular pressure vessel 1 has an inlet opening 3 having inlet connection 4 and an outlet opening 5 having outlet port 6 and serves to deflect a strand-shaped, in 3 shown product 19 , for example, an electric cable. For this purpose, the pressure vessel takes 1 in its interior a rotatable deflection ring 7 for the stranded product to be deflected 19 on, which by several leadership roles 8th is stored. In operation is the pressure vessel 1 through an in 3 Shown, lid-shaped top 18 sealingly closed and arranged by means of two circumferentially, each one designed as a pneumatic cylinder actuator 10 having adjusting means 9 Locked, which is a relative rotation of the base 2 opposite the top 18 around a virtual axis of rotation 11 of the pressure vessel 1 To run. For detecting a force acting on the product during operation tensile force F is at the pressure vessel 1 a sensor 12 provided, based 2 is explained in more detail.

As in the enlarged view of this sensor 12 enclosing area of the pressure vessel 1 can be seen, the sensor is used 12 the detection of a by the diversion of in 3 shown product 19 on the deflection ring 7 caused radial displacement of the deflection ring in the direction of the double arrow 13 within the lower part 2 of the pressure vessel 1 , For this purpose, the sensor points 12 a designed as a rolling body contact body 14 on, which against an inner circumference of the deflection ring 7 is applied and by means of a spring element designed as a compression spring 15 opposite the deflection ring 7 is biased. This spring element 15 is on a designed as a pressure cell pressure measuring sensor 16 supported, wherein the bias by means of an abutment for the pressure measuring sensor 16 serving thread 17 is adjustable. By the sensor 12 in the region of a geometric center of the deflection ring 7 between the inlet port 4 and the outlet port 6 is arranged, like this 1 it can be seen, the support and the storage of the deflection ring takes place 7 in operation at least approximately alone by the rotatable contact body 14 of the sensor 12 , Other leadership roles 8th On the other hand, they merely serve to limit the radial displacement of the deflecting ring 7 ,

In addition is in 3 still a cut side view of the in the 1 and 2 shown pressure vessel 1 shown in an operating position in which the lower part 2 and the top 18 of the pressure vessel 1 sealingly connected to each other and the pressure vessel 1 filled with a fluid with overpressure. It can be seen inside the pressure vessel 1 in the resting position on the guide rollers 8th around the virtual axis of rotation 11 rotatably mounted deflection ring 7 for a rope-shaped product 19 , The lock for tightly closing the pressure vessel 1 takes place by a relative rotation of the upper part 18 opposite the lower part 2 , where are radial formations 20 of the top 18 and formations 21 of the lower part 2 Undercut, so that the upper part 18 against the lower part 2 can be adjusted by the angular position corresponding clamping and determining the sealing force. To initiate the relative rotational movement serve in 1 shown adjusting means 9 , Of course, the pressure vessel 1 be arranged in an upright, for example, vertical position such that the upper part 18 and the lower part 2 form two side parts.

The thus adjustable unlocked position and the locked operating position of the pressure vessel 1 will be described below on the basis of 4 and 5 shown in more detail in a plan view. Similar to a bayonet catch at a in 4 in the direction of the arrow 22 acting relative rotation of the upper part 18 opposite the lower part 2 the respective formations 20 of the top 18 and the formations 21 of the lower part 2 in the in 5 shown operating position in a row. In the embodiment shown, the U-shaped upper part closes 18 the lower part 2 on the inner circumference and on the outer circumference with its legs, wherein the legs of the respective radial formations 20 . 21 wear. In contrast, the in 4 shown, unlocked position, starting from the locked operating position by a rotation in the direction of arrow 23 is achieved, a simple lifting of the top 18 by making the undercuts of the formations 20 . 21 are canceled, which for this purpose preferably as shown have substantially uniform dimensions. The thus realized quick release quick accessibility for cleaning and maintenance purposes is achieved and at the same time a small volume of the pressure vessel by the annular design 1 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2110365 A1 [0003]
• DE 2803964 A1 [0004]
• DE 102008029167 A1 [0005]
• DE 2444952 A1 [0006]
• DE 2626721 Al [0007]
• DE 3701392 A1 [0007]

Claims (10)

Annular pressure vessel ( 1 ) with an inlet opening ( 3 ) having inlet connection ( 4 ) as well as an outlet opening ( 5 ) having outlet port ( 6 ), the pressure vessel ( 1 ) is designed as a pressure vessel and in its interior a rotatable deflection ring ( 7 ) for a stranded product to be deflected ( 19 ), wherein a lid-like upper part ( 18 ) and a lower part ( 2 ) of the pressure vessel ( 1 ) are releasably sealingly connected by means of a fixing agent along a dividing plane, characterized in that the pressure vessel ( 1 ) with a deflection ring ( 7 assigned sensor ( 12 ) for detecting a product due to deflection of the product ( 19 ) on the deflection ring ( 7 ) acting tensile load (tensile force F) is equipped. Pressure vessel ( 1 ) according to claim 1, characterized in that the sensor ( 12 ) as a rolling body or sliding body running contact body ( 14 ), which against an inner peripheral surface and / or outer peripheral surface of the deflection ring ( 7 ) is present. Pressure vessel ( 1 ) according to claim 2, characterized in that the contact body ( 14 ) by means of a spring element ( 15 ) relative to the deflection ring ( 7 ) is biased. Pressure vessel ( 1 ) according to claim 2 or 3, characterized in that the contact body ( 14 ) as one opposite the deflection ring ( 7 ) in particular radially movable guide roller ( 8th ) is executed. Pressure vessel ( 1 ) according to at least one of the preceding claims, characterized in that the sensor ( 12 ) a pressure measuring sensor ( 16 ) having. Pressure vessel ( 1 ) according to at least one of the preceding claims, characterized in that the sensor ( 12 ) in the region of a geometric center of the deflection ring ( 7 ) between the inlet port ( 4 ) and the outlet port ( 6 ) is arranged. Pressure vessel ( 1 ) according to at least one of the preceding claims, characterized in that the sensor ( 12 ) a displacement sensor for detecting a particular radial displacement (double arrow 13 ) of the deflection ring ( 7 ) having. Annular pressure vessel ( 1 ) with an inlet opening ( 3 ) having inlet connection ( 4 ) as well as an outlet opening ( 5 ) having outlet port ( 6 ), the pressure vessel ( 1 ) is designed as a pressure vessel and in its interior a rotatable deflection ring ( 7 ) for a stranded product to be deflected ( 19 ), wherein a lid-like upper part ( 18 ) and a lower part ( 2 ) of the pressure vessel ( 1 ) are sealingly connected by means of a fixing means along a dividing plane, characterized in that the fixing means is designed as a quick release and at least one, preferably more on the inner circumference and / or on the outer periphery of the pressure vessel ( 1 ) arranged in a first relative angular position of the upper part ( 18 ) opposite the lower part ( 2 ) releasing and undercutting in a second angular position forms ( 20 . 21 ) having. Pressure vessel ( 1 ) according to claim 8, equipped with a sensor ( 12 ) for detecting a product due to deflection of the product ( 19 ) on the deflection ring ( 7 ) acting tensile load (tensile force F) according to at least one of claims 1 to 7. Apparatus for the continuous production of wrappings for a rope-shaped product with an annular pressure vessel according to at least one of the preceding claims.

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