WO2018114036A1

WO2018114036A1 - Securing device for cables

Info

Publication number: WO2018114036A1
Application number: PCT/EP2017/001405
Authority: WO
Inventors: Jochen Caspari
Original assignee: Hydac Accessories Gmbh
Priority date: 2016-12-21
Filing date: 2017-12-05
Publication date: 2018-06-28
Also published as: DE102016015226A1; EP3560053A1

Abstract

The invention relates to a securing device comprising a rotational drive which is received in a housing (9). When the drive is actuated in a first rotational direction by hand, a securing part (11) can be moved in a translational manner into an end position retracted into the housing (9) against the effect of an energy storage unit (51) by means of threaded sections (19, 78, 79), and by actuating the drive in the opposite second rotational direction, the securing part extends out of the end position into at least one transfer position, in which the securing part (11) is released for translational retracting and extending movements and out of which the securing part (11) can be returned by actuating the drive in the first rotational direction against the effect of the energy storage unit (51), wherein the transfer position is formed by parts (80 to 84) of the threaded sections (19, 78, 79).

Description

FIXING DEVICE FOR CABLES

The invention relates to a fixing device. More particularly, the invention relates to a fixing device which can be used to guide and fix strand-like elements which are inserted into a strand receptacle of the receptacle body in a fastening system, in particular a modular system which has a receptacle body which can be combined with a support structure. Fastening systems of this type are preferably used in wind turbines for fixing strand-like elements, such as multiple or single cables, preferably power cables, which run as a riser in the tower or as a cable bundle from the tower to the machine house.

As an example of the related art, the document DE 10 2012 01 7 463 A1 shows a fixing device, which is mounted with its housing at the opening of a strand receiving a receiving body so pivotally that they th from the insertion of strand elements in the strand intake enabling release position is pivotable in a position closing the opening functional position. The fixing part in the form of a translationally movable pusher is biased by an energy storage serving as a package compression springs in an extended end position. When pivoting the fixing device in the opening closing functional position in which the spring force of the pusher as Holding force acts on the inserted strand elements, the spring force is overcome during the closing process. In order to ensure secure fixation of the string elements, holding forces of approximately 200 to 400 N are required for use in wind turbines, where high cable weights and the paths and forces occurring in the case of short-circuit currents or thermal expansions are to be controlled. In the process of closing the openings of the receiving body therefore correspondingly high closing forces are overcome, so that the operation of the known fixing device for the operator relatively cumbersome and time-consuming designed accordingly.

Based on this prior art, the invention has the object to provide a fixing device available, which can be actuated by the operator without significant effort.

According to the invention this object is achieved by a fixing device having the features of claim 1 in its entirety.

Accordingly, the invention provides a rotary drive with threaded ridges, which make it possible to tension the fixing part against the action of the energy accumulator acting on it in a fully retracted end position by a rotational movement carried out by hand. Without having to overcome the power of the energy storage, the fixing device can be brought to the opening of a respective strand intake in the closed position, ie in the functional position, and secured in this on the associated receiving body. By turning operation in the opposite second direction of rotation of the fixing part is extendable into a transfer position in which the fixing part is released for translational retraction and extension movements. In this operating state, only the force of the energy store is effective on the fixing part, so that this acts on the inserted strand elements with the holding force generated by the energy storage. The transfer part releasing the fixing part ment is formed by designing corresponding parts of the threaded sections, which also enables a provision of the fixing part in the energy storage exciting, fully retracted end position by rotational actuation of the drive in the first direction of rotation. The relatively effortless tensioning of the fixing part by means of an actuatable by turning drive and the closing of respective strand recordings, without having to overcome the clamping force of the fixing part, makes it possible to design the energy storage to high forces, so that a secure fixation of the strand elements with high holding force reali- is possible. Therefore, higher cable weights, for example of power cables in wind turbines, permissible, the forces occurring in short-circuit currents are manageable. With the fixing device according to the invention, a tool-free mounting system is available, in which the holding force is independent of the muscular strength of the operating personnel. In the invention, the respective transfer position is formed by interruptions in threads of Gewindestrecke, which can be arranged distributed in such a way that at certain rotational positions, an axial displacement takes place from one to the other thread and thereby between a thread and the next thread for the fixing part free spring travel is formed. In the case of a coarse thread, a long thread pitch corresponding to a long spring travel is available.

Advantageously, the arrangement can be made such that the housing thread of an internal thread and the fixing part has threads of an external thread to form the threaded section.

In particularly advantageous embodiments, the threads of the internal thread are formed in a spindle sleeve forming a component of the housing, on which a housing cover with gripping surfaces for the maneuvering is formed. hurry rotary actuation of the spindle sleeve is formed. This assembly may advantageously be integrally injection molded from a plastic material.

The threads of the external thread may be formed on a guided in the spindle sleeve spindle body of the fixing part, which may also be formed by a molded plastic injection molding.

In advantageous embodiments, the fixing part has a pusher and the housing on a pusher top, both of which are in the form of shells, which correspond in outline to a rectangular parallelepiped with rounded corner areas, with their open shell side facing each other and telescopically movable mesh. These shells are preferably also injection molded from plastic material.

As energy storage, a package of compression springs can be arranged in the interior of the shells of pusher and pusher upper part, wherein in each corner region of the shells, a compression spring can be provided.

The arrangement can be made with advantage so that the force of the compression springs is on the one hand transmitted from the pressure applied to the housing cover pusher top to the spindle sleeve and on the other hand is effective on a located at the bottom of the shell of the pusher pressure plate on the spindle body. With regard to the transmission of the spring force on the spindle body of this can be used to secure against the spring force with its pressure plate associated end of an opening of the pressure plate and overlap with end-side, projecting flange wall portions of the opening.

Furthermore, an abutment device can be provided on the bottom of the shell of the pusher, which in cooperation with a counterpart impact on the breakthrough of the pressure plate by cross-part of the spindle body secures them against rotation relative to the spindle sleeve.

For the immediate transfer of the holding force to the respective adjacent strand element, the arrangement may advantageously be made so that in the bottom of the shell of the pusher a directed onto the opening of the pressure plate passage is formed and provided that attachable to the outside of the bottom of the pusher pusher plate is that forms the stopper for rotation of the spindle body with protruding through the passage into the interior of the pusher parts. This pressure plate can be provided with a rib structure on the outer side opposite the stop device.

In particularly advantageous embodiments, a radially projecting stop body is provided in the spindle sleeve and on the spindle body which come into engagement with each other in the extended end position of the fixing part and block the further rotary actuation of the drive in the extension direction. By blocking the rotary actuator in a final rotational position, the threaded section also forms the end stop for the failure rbewegung the pusher.

As part of a fastening system for fixing and guiding strand-shaped elements, in particular of cables or cable bundles

Wind power plants, the housing is on a combinable with a support structure receiving body, which has at least one opening for inserting at least one opening, at the latter in a functional position attachable such that by means of the fixing part a more energy generated by the holding power is applied to inserted strand elements.

As a holding device for attaching the housing to the receiving body may advantageously be provided a holding device, which is a movement the housing between an enabling the insertion of the strand elements enabling release position and the functional position allows.

In advantageous embodiments, the holding device has a holding plate arranged between pusher top and housing cover, which protrudes with resilient lugs on both longitudinal sides of the handle top and with a tab a pivot bearing on one edge of the respective opening of the receiving body and with the other tab one with the other Edge of the opening of the receiving body cooperating releasable latching device for securing the housing in the functional position forms.

In a particularly advantageous manner, in this case, the latching device for forming a positive latching on the receiving body having a latching hook, which is engageable behind by a latching body located on the associated tab. The invention with reference to an embodiment shown in the drawing is explained in detail. Show it:

Fig. 1 is a front view of a fastening system having fixing devices according to an embodiment of the invention; Fig. 2 is an exploded perspective view of the embodiment of the fixing device according to the invention drawn in the manner of an exploded view; an approximately natural-sized practical embodiment of a plan view of a housing top partly the embodiment of the fixing device according to the invention;

Fig. 4 is a sectional view of the upper housing part corresponding to the section line IV-IV of Fig. 3; Fig. 5 is a sectional view taken along section line V-V of Fig. 3;

Fig. 6 is a sectional view taken along the section line Vl-Vl of Fig. 3;

Fig. 7 is a sectional view corresponding to the section line

VII-VII of Fig. 3;

Fig. 8 is a plan view of the embodiment, wherein the fully retracted end position of the fixing part of the embodiment is shown;

Fig. 9 is a plan view of the embodiment, wherein the fully extended end position of the fixing part of the embodiment is shown;

Fig. 10 is a sectional view taken along the section line X-X of Fig. 8;

Fig. 1 1 is a sectional view corresponding to the section line XI-XI of Fig. 8;

Fig. 12 is a sectional view taken along section line XII-XII of Fig. 9; Fig. 13 is a sectional view corresponding to the section line

XII-XIII of Fig. 9;

Fig. 14 and 1 5 are side views of a spindle body of the embodiment, wherein rotated by 90 ° to each other positions are shown;

16 is a perspective oblique view of the spindle body, seen on the underside;

Fig. 17 is a plan view of the spindle body in the rotational position shown in Fig. 15; 18 and 19 are perspective side views of the spindle body, seen on the top and in positions rotated by 90 ° to each other; and

20 and 21 are side views of the spindle body in mutually rotated by 90 ° rotational positions.

With reference to the drawing, the invention is explained using the example of the use of the fixing device in a fastening system, which is provided for fixing cables or cable bundles in wind turbines. It is understood that the invention equally advantageous for the fixation and management of other types of string elements, for example in the form of pipes or the like, is applicable. Fig. 1 shows for the fixation of cables 1, which are guided in the tower of a wind turbine, a receiving body 3, which is mounted on a tower, not shown support structure. In the receiving body 3 is a succession of strand receptacles 5 for strand elements to be fixed, such as the cable shown in Fig. 1 1. The strand recordings are formed by recesses U-shaped configuration, which on one side of the receiving body 3 have an opening 7. In the example shown, the receiving body 3 is formed by a straight bar of a steel sheet. Likewise, the receiving body 3 could have the shape of a circle segment or a circular ring. The openings 7 of the strand receptacles 5 are assigned fixing devices according to the invention, which can be attached to their housing 9 at the opening edge of the openings 7 in such a way that they can assume a release position for the insertion of cables 1 and a functional position for fixing inserted cables 1. In Fig. 1, the release position in the second and the fifth strand Auf- 5, counted from the left, shown, while the other strand receptacles 5, the housing 9 is shown in the operating position. When located in the release position housing 9 is the associated, relative to the housing 9 movable fixing part 1 1 each in the fully retracted, cocked position. In the housings 9 which are in the functional position, the fixing part 11 is shown in the position which is more or less extended and adapted to the dimensions of the cable 1 inserted in the strand receptacles 5.

FIG. 2 shows the individual parts of the embodiment of the fixing device according to the invention in an exploded drawing, while the assembled state can be seen from the sectional views in FIGS. 10 to 13. The position of the cutting planes of FIGS. 10 and 11 is indicated in FIG. 8, and the position of the cutting planes of FIGS. 12 and 13 is indicated in FIG. As shown in FIG. 2, the housing 9 has an upper housing part 13, which has a housing cover 15 and a molded on its underside in a central position, a hollow circular cylinder forming spindle sleeve 1 7, which forms part of a threaded section , Between housing 9 and fixing part 1 1, the spindle sleeve 1 7 forms on its inside an internal thread with threads 19. The housing cover 15, s. Fig. 3, in its outline, two opposite long sides 22, which have a concave curvature, so that the width of the housing cover 1 5 in the aligned on the center 20 of the spindle sleeve 1 7 area is the lowest. At the ends of the long sides 22, the narrow sides 21 of the housing cover 15 are respectively arched in correspondence with a center 20 concentric circular arc. 2 and 4, a downwardly projecting edge enclosure 24 is formed on the peripheral edge of the narrow sides 21, forming a part (cylindrical wall part) .On its upper side, the housing cover 15 has ribs 23 extending from an upwardly projecting end section 25 extend from the cylinder of the spindle sleeve 1 7, with outwardly sloping rib height to the edge of the housing cover 1 5. These ribs form gripping surfaces for the manual rotation of the housing cover 15 and thus the spindle sleeve 17th

As a further main part, the housing 9 has a pusher upper part 27. This, like the upper housing part 13, is injection-molded in one piece from plastic and has the shape of a shell whose outline corresponds to a rectangular block with rounded corner areas 29. This shell has a planar in Fig. 2 level surface 31, in which a central, circular passage 33 is formed. In the assembled state, in which the spindle sleeve 17 extends through the passage 33, a holding plate 35 is inserted between the underside of the housing cover 15 and the pusher upper part 27, which consists of a spring plate. The holding plate 35 has a flat central part 37 whose dimension is adapted to the size of the contact surface, which is formed on the outer side of the bottom 31 as a recessed surface between raised edge regions 39 on the narrow sides 21. By formed for the middle part 37 matching enclosure by the edge portions 39, the holding plate 35 is secured against rotation relative to the pusher upper part 27. At the middle part 37, in which a central opening 40 is located, which is aligned with the passage 33 of the handle upper part 27, closes on both sides each a resilient lug 41, which, spread apart at an angle of about 45 °, extend alongside the long sides 22 of the pusher upper part 27, s. Fig. 1, 10 and 12. At its free end, the tabs 41 each form a sleeve 42 for a round rod 43 which is exposed in a gap formed by a in the tabs 41 centrally provided incision 45.

As shown in FIG. 2, the fixing part 1 1 as a main components on a pusher 47 and a spindle body 49, both of which are each injection molded in one piece of plastic. The spindle body 49 is formed by a hollow cylinder closed at the upper end 50 (FIG. 16). The pusher 47 has the shape of a shell, which is adapted in shape and size of the pusher upper part 27 forming shell such that the pusher 47 is guided in the shell of the pusher upper part 27 telescopically displaceable. The shell of the pusher 47 is open to the pusher upper part 27 so that an interior is formed in the shells, which forms the spring housing for a package of compression springs 51. In the planar bottom 53 of the pusher 47, a central passage 55, which is aligned with the passage 33 of the pusher upper part 27, as well as in the quadrangular areas a round hole 57 is formed. As a further part of the fixing part 1 1 is a metallic pressure plate 59 which fits in the shell of the pusher 47 at the bottom 53 fits provided. In its quadrilateral areas, the pressure plate 59 has round holes 61 which are aligned with the round holes 57 of the shell of the pusher 47. In addition, in the pressure plate 59, a central recess is formed, which is aligned with the passages 33 and 45, but, unlike this, is formed out of round. The recess 63 is shaped such that it is tangible from the lower end of the spindle body 49 at a mounting rotational position, in contrast, in a functional rotational position twisted spindle body 49, however, overlapped with its opening edge of flange 65 of the spindle body 49 which are opposite to each other are formed projecting at the end of the spindle body 49. The fixing part 11 is completed by a pusher plate 66 which, like pushers 47 and Spindle body 49 is injection molded from plastic and with its with a ribbing 67 (Fig. 1 1) provided outside the contact surface for the cable to be fixed 1 forms. The pusher plate 66, the outline of which corresponds to that of the bottom 53 of the pusher 47, has in the corner areas protruding latching pin 69, which pass through the circular holes 57 in the bottom 53 and latch the pusher plate 66 on the pusher 47. In this case, the locking pins 69 also pass through the circular holes 61 of the pressure plate 59. The projecting ends of the locking pins 69 engage centering in the helical compression springs 51, which are respectively guided on sleeves 71, which, s. Fig. 2, 1 1 and 13, extend from the bottom 31 of the handle top 27 into the shell interior. The spindle body 49 is centered with its lower end on a projecting, the passage 55 in the pusher 47 by cross annular body 73 of the pusher plate 66. On annular body 73 is a centrally and parallel to the long sides of the pusher plate 66 extending stop bar 75 which forms by engaging in slots 77 of the spindle body 49 for this a rotation.

3 to 7 show the arrangement of the threads 19, which form the internal thread of the threaded section in the spindle sleeve 1 7. In cooperation with external threads 78 and 79 on the spindle body 49, a coarse thread is formed, which provides an axial stroke of 20 mm at full rotational movement through 360 ° in the present embodiment. As shown in FIGS. 3, 4, 5 and 7, the threads 19 are interrupted several times, so that, in the spindle sleeve 1 7 from top to bottom, a first gap 80, a second gap 81, a third gap 82 and a fourth Gap 83 is formed in the threads 19. The corresponding outer threads 78, 79 on the spindle body 47 are also interrupted and form a gap 85, which, seen from the lower end of the spindle body 47, is approximately one third of the height of the threaded section and in an approximately aligned on a slot 77 rotational position located. Fig. 8 shows the rotational position at fully retracted Festlegeteil 1 1, wherein an arrow mark 87 is aligned on the spindle sleeve 1 7 on an arrow mark 88 on the housing cover 15. It is visible from the threaded section, the upper end portion of a thread 79 of the spindle body 47. Fig. 9 shows the rotational position at fully extended state of the fixing part, wherein the spindle body 1 7 with respect to FIG. 9 is rotated by 360 ° and the arrow marks 87 and 88 are in turn aligned. In this state, the first gap 80 and the second gap 81 are visible from the internal thread, and three sections of the threads 19. From the external thread of the upper thread 79 is visible.

Figs. 10 to 13 show the Figs. 8 and 9 associated sectional views. As shown in FIGS. 10 and 11, the spindle body 17 is blocked by threaded engagement of its lower and upper outer threads 78 and 79 with portions of the threads 19 of the spindle sleeve 17 against downward movement, so that the fixing member 11 is contracted Compression springs 51 is stretched. In the rotational position of FIG. 9, only the upper portion of the upper thread 79 is in threaded engagement with threads 19 of the spindle sleeve 17. For retraction movements against the force of the compression springs 51 is thereby a spring path, at said thread pitch of the embodiment of 20 mm, available, within which the force of the compression springs 51 on the pusher 47 is effective to fix via the pusher plate 67 inserted cable 1 with the holding force generated by the package of the springs 51.

At the threaded section a stop device is provided which blocks the further rotation in the extended direction at the fully extended end position. For this purpose, the spindle sleeve 1 7, as shown in FIGS. 3 and 7 can be removed, a radially projecting stop body 89 which is arranged at the lower end edge of the spindle sleeve 1 7 such that it forms a lateral stop surface 90, with a vertical, middle Radial plane of the spindle sleeve 1 7 is aligned. On the part of the spindle body 49, the Impact device on a second radially projecting stop body 91, which, as shown in FIGS. 18, 20 and 21, in the upper third of the height of the spindle body 49 is located at a position where it forms a lateral stop surface 92, in the same vertical Radial plane as the abutment surface 90 of the stopper body 89 of the spindle sleeve 1 7 lies. By abutting the stop surfaces 90 and 92, the further rotational movement is blocked in the fully extended position, so that the spindle body 49 and thus the fixing part 1 1 are secured against escaping from the housing 9 of the fixing part. The arrangement of the interruptions in the threaded sleeve of the threads depends on the stop 89, 90 and in order to be able to remove the spindle sleeve (FIG. 17) in an injection molding tool without a slide.

For the cooperation with the holding device of the fixing device, the associated receiving body 3 at the openings 7 of the strand receptacles 5, s. Fig. 1, at an opening edge in each case a bore 94 and at the opposite edge of the opening a latching hook 95. The bore 94 forms with the round rod 43, which is exposed in the recess 45 of the holding plate 35, a pivot bearing for the housing 9. In the

Closed position pivoted housing 9, the opposite round rod 43 can be suspended in the snap hook 95, the support surface 96 is formed in such a way, s. Fig. 1, that the engaging behind, latched round body 43 is positively secured against disengagement, when the holding device is loaded by the force of the compression springs 51. When fully retracted state of the fixing part 1 1, in which the holding device is relieved, the catch on the snap hook 95 is aushängbar.

Claims

P a n t a n s p r e c h e

1 . Locking device, with a rotatable drive housed in a housing (9), upon actuation in a first direction of rotation by hand, a fixing part (1 1) by means of threaded ranks (19, 78, 79) translationally against the action of an energy storage device (51) in an in the housing (9) retracted end position is movable, from which it extends by operating the drive in the opposite second direction of rotation in at least one transfer position in which the fixing part (1 1) is released for translational retraction and extension movements and out of the Festlegeteil (1 1) by operating the drive in the first direction of rotation against the

Effect of the energy store (51) is reset again, wherein the transfer position by parts (80-84) of the threaded sections (19, 78, 79) is formed.

2. Locking device according to claim 1, characterized in that the respective transfer position by interruptions (80-84) in threads (19, 78, 79) of the threaded section is formed.

3. Fixing device according to claim 1 or 2, characterized in that for forming the threaded section, the housing (9) threads (19) of an internal thread and the fixing part (1 1) threads (78, 79) of an external thread.

4. Fixing device according to one of the preceding claims, characterized in that the threads (19) of the internal thread in a part of the housing (9) forming the spindle sleeve (1 7) are formed on which a housing cover (15) with handle surfaces (23) for the manual rotational actuation of the spindle sleeve (1 7) is formed.

5. Locking device according to one of the preceding claims, characterized in that the threads (78, 79) of the external thread on a in the spindle sleeve (17) guided spindle body (49) of the fixing part (1 1) are formed.

6. Fixing device according to one of the preceding claims, characterized in that the fixing part (1 1) has a pusher (47) and the housing (9) has a pusher upper part (27), which are both in the form of shells, which in outline Rectangular cuboid with rounded corners (29) correspond, with their open shell side facing each other and telescopically movable mesh.

7. Locking device according to one of the preceding claims, characterized in that as energy store in the interior of the shells of pushers (47) and pusher upper part (27) a package of compression springs (51) is arranged.

8. Locking device according to one of the preceding claims, characterized in that the force of the compression springs (51) on the one hand from the housing cover (15) adjacent the pusher upper part (27) on the spindle sleeve (1 7) is transmitted and on the other hand via a on the bottom (53). the shell of the pusher (47) located pressure plate (59) on the spindle body (49) is effective.

9. Locking device according to one of the preceding claims, characterized in that the spindle body (49) for securing against the spring force with its pressure plate (59) associated with the end of an opening (63) of the pressure plate (59) passes through and with End-side, projecting flange parts (65) edge regions of the opening (63) overlaps.

10. Fixing device according to one of the preceding claims, characterized in that at the bottom (53) of the shell of the pusher (47) an abutment means (75) is provided, in cooperation with a counter-stop (77) on which the opening (63) of Pressure plate (59) by cross-part of the spindle body (49) this against rotation relative to the spindle sleeve (1 7) secures.

1 1. Locking device according to one of the preceding claims, characterized in that in the bottom (53) of the shell of the pusher

(47) is formed on the opening (63) of the pressure plate (59) aligned passage (55) and that on the outside of the bottom (53) of the pusher (47) attachable pusher plate (66) is provided, which with through Passage (55) into the interior of the

Pusher (47) projecting parts (75) the stop means for

Anti-rotation of the spindle body (49) forms.

12. Fixing device according to one of the preceding claims, characterized in that in the spindle sleeve (1 7) and on the spindle body (49) each have a radially projecting stop body (89, 91) is provided, which at an extended end position of the fixing part

(1 1) come into engagement with each other and block the further rotational actuation of the drive in the extension direction.

13. Locking device according to one of the preceding claims, characterized in that it is provided as part of a fastening system for fixing and guiding of strand-shaped elements, in particular of cables (1) or cable bundles in wind turbines, and that the housing (9) at one with a Carrier structure combinable receiving body (3), for insertion at least a strand element has at least one opening (7), can be attached to it in a functional position such that by means of the fixing part (1 1) a holding force generated by the energy store (51) is exerted on inserted strand elements.

4. Fixing device according to one of the preceding claims, characterized in that for mounting the housing (9) on the receiving body (53) has a holding device (35, 43, 94, 95) is provided which movement of the housing (9) between a Inserting the strand elements (1) enables enabling position and the functional position allows.

5. Locking device according to one of the preceding claims, characterized in that the holding device (35, 43, 94, 95) between a pusher upper part (27) and the housing cover (15) arranged holding plate (35) with the resilient lugs (41) via both long sides (22) of the handle upper part (27) projecting and with the one tab (41) has a pivot bearing (94) at one edge of the respective opening (7) of the receiving body (3) and with the other tab (41) one with the respective another edge of the opening (7) of the receiving body (3) cooperating releasable locking means (43, 95) for securing the housing (9) in the functional position.

16. Fixing device according to one of the preceding claims, characterized in that the latching device (43, 95) for forming a positive locking on the receiving body (3) has a latching hook (95, 96), of a located on the associated tab (41) Locking body (43) can be engaged behind.