ES2954494T3 - Fixing arrangement for tensioning fixing means comprising at least one protection against twisting - Google Patents

Abstract

To solve the problem of providing an improved fixing arrangement for clamping fasteners, which allows a rotation-proof fixation of the respective fixing element for holding the fixing elements, such a fixing arrangement is proposed, comprising at least one anti-twist device for fastening. fastening elements, in which the anti-rotation device can be arranged in a clamping device, and the anti-rotation device has a longitudinal extension in the direction of a longitudinal axis and an upper end area with an upper front surface, a middle area and a lower end region with a lower end face, the upper end region and the lower end region each forming an end region of the longitudinal extension and between the upper end region and the lower end region of the middle region are arranged, the upper end region is designed in such a way that the anti-rotation device can be at least rotatably fixed by the arranged clamping device and the lower end region is designed in such a way that an arranged bolt can be at least rotatably fixed. rotating. (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Fixing arrangement for tensioning fixing means comprising at least one protection against twisting The invention relates to a fixing arrangement for tensioning fixing means and to a method for tensioning fixing means by means of a fixing arrangement of this type.

Clamping devices are known for tensioning fixing means. Bolts, screws, nuts and the like, which are to be fastened by means of a joint in two flanges, for example in an industrial production of installations, such as wind turbines, are tightened with a clamping device on the flanges. To do this, a screw is previously installed in most cases by hand or by means of a small turning moment. By means of this first assembly, a retention of the flanges on each other is possible and further construction of the installation can take place. During additional tightening following the screw connection by means of a clamping device, there is a risk that the previously installed screw will also rotate. In this way, the screw, for example, can be undesiredly completely or partially unscrewed again from a nut. The so-called bolt projection or thread projection, with which the screw protrudes above the nut, is then no longer sufficient to apply a certain force to the screw and nut connection by means of the clamping device, since there is no longer enough thread engaged. This can lead to life-threatening conditions due to the loosening of the fixing means.

EP 1935570 A1 describes a fixing tool, comprising a tubular fixing part, a spindle part, a pressure part and a fixing part. The fixing piece rotates a nut. The spindle part is arranged in an internal section of the fixing part and pulls a shank section of a bolt in the axial direction. The bolt has a free end, on which a concave coupling section is formed. The pressure part presses against a fastening part based on a reaction force, which is exerted on the spindle part, and is arranged in an external section of the fastening part. The fixing part is arranged in an internal section of the spindle part, is pushed in the axial direction and has a free end, which engages in the coupling section of the bolt. Tightening the bolt and nut does not rotate the fixing piece. The clamping part is also used as a sensor, which stops the spindle motor, which rotates the spindle part.

EP 0 124 340 A2 describes a device for pulling a bolt for a flange connection. This device comprises a pull piece and an annular bolt, which surrounds the pull piece and rests with its free end on the flange connection. The bolt has a head with two projections projecting radially outwards and a transverse key slot. The drive piece comprises two projections projecting radially inwards, which engage under the two projections, and a key, which engages in the key groove. Tightening or tensioning the bolt and nut engages the drive piece to the head of the bolt so that the shoulders of the drive piece engage under the shoulders of the bolt. In this engagement position, the key slides into the key slot, so that the key releases a lever with its upper end. The lever can then be rotated to open a valve, through which a hydraulic fluid flows, which pulls the pull member relative to the bolt 15 upwards, thereby stretching the bolt. The nut is then tightened or tensioned with the help of a rotating rod (not shown) against the bolt.

GB 1249 979 A describes a pulling device for pulling a bolt for a flange connection. This traction device comprises a cylinder, a shaft with a coaxial hole, a coupling nut with internal thread and a rod. The cylinder rests with its free end on a reaction surface of the flange connection. The shaft is arranged coaxially in the cylinder and has an external thread at its free end. The coupling nut engages with its internal thread in the external thread of the shaft and in the external thread of the bolt. The bar extends through the hole in the tree, can move freely in the hole and rests on the bolt. Before tightening the bolt and nut, the head of the bolt is welded to the lower structural component of the flange connection and the coupling nut and shaft are pressed upward into the cylinder, thereby stretching the bolt. The bar serves to transmit the stretch of the bolt to an external measuring screw. A nut swivel collar is placed over the nut before stretching. The rotating nut collar has several openings on its outer casing surface, into which a rotating rod can be inserted. After stretching, the nut is tightened or tensioned with the help of the rotating nut collar and the rotating shank against the bolt.

The objective of the invention is to provide an improved fixing arrangement for tensioning fixing means, which enables fixation with protection against twisting of the respective fixing means for tensioning of the fixing means.

This objective is achieved through the objects of the independent claims. Advantageous embodiments of the invention are described in the dependent claims.

The invention proposes according to a first aspect a fixing arrangement for tensioning fixing means, which comprises at least

- a torsion protection, which can be arranged in a clamping device,

in which

- the torsion protection has a longitudinal extension in the direction of a longitudinal axis and an upper end zone with an upper front side, a central zone and a lower end zone with a lower front side,

- the upper end zone and the lower end zone form, in each case, an end zone of the longitudinal extension and the central zone being arranged between the upper end zone and the lower end zone,

- the upper end region is configured in such a way that the torsion protection can be fixed at least rotatably by means of the clamping device that can be arranged at least, - the lower end region is configured in such a way such that a bolt that can be arranged is at least rotatably fixable,

- the fixing arrangement comprises a sleeve, which is arranged around the torsion protection and with which a bolt projection of the bolt can be measured.

In the sense of the invention, a rotating fixation of a component is understood to mean a retention, preventing rotation around a body axis of the component, preferably a longitudinal axis thereof. The fixing arrangement according to the invention preferably further comprises a clamping device.

The fixing means may be screws, nuts, bolts and the like. Fixing means in the sense of the invention preferably means a bolt system. A bolt system may comprise several fixing means, in particular complementary, for example a screw and a nut. The bolt system comprises for example at least one bolt, a nut and a counter bearing. In one embodiment, the counter bearing is designed as a screw head, which is directly connected to the bolt material. The bolt can then be considered a screw. The bolt system is then composed of a bolt configured as a screw and a nut. Washers may always be present, which can be considered part of the counter bearing. In a further embodiment, the counter bearing comprises at least one lock nut. The bolt system may be composed of a nut, a locknut and a bolt. Furthermore, the bolt system may in one embodiment have at least one, preferably two washers. Particularly preferably, it is provided that the nut has an internal nut thread, which corresponds to the external thread of the bolt. In particular, the bolt is a threaded bolt, the external thread of which corresponds to the internal thread of the nut and, if applicable, to the locknut. Fixing means in the sense of the invention also means a bolt system with a receiving device. The so-called receiving device is preferably a flange connection, comprising at least two flange elements or flanges.

The torsion protection is preferably in the form of a rod. The torsion protection is substantially rod-shaped, particularly preferably in the direction of the longitudinal extension of the torsion protection. The torsion protection is preferably made of solid material, particularly preferably made of metal. The protection against twisting can preferably be produced by means of a turning and/or milling process.

In the central area, the torsion protection is preferably configured in the form of a cylinder. In the central region, the torsion protection may have at least one radially surrounding groove. The slot is preferably arranged closer to the upper end region than the lower end region. However, in the case of an arrangement in the lower drive unit of a clamping device, the slot may also be arranged closer to the lower end region. A lock ring for a lock washer can be provided in the groove.

The torsion protection according to the invention can be implemented by means of a complementary configuration, for example with respect to a bolt that can be arranged, of the lower end region a bolt rotary fixation by means of form and/or force engagement. The twist protection according to the invention can be rotatably fixed by means of a special configuration of the upper end region, for example by means of form and/or force engagement, on or to a clamping device.

For example, the upper and/or lower end region of the torsion protection can at least partially have a shape that is polygonal in shape. Preferably, the upper and/or lower end region of the torsion protection is at least partially configured as a square or hexagon. The upper and lower end zones can be configured the same or differently with respect to its polygonal characteristic. However, the torsion protection can also be formed continuously as a polygon, for example as a square rod or hexagonal rod.

The torsion protection preferably has an upper end region with an upper front side. The torsion protection preferably has a lower end region with a lower front side. The end sides can preferably be configured polygonally, preferably squarely or hexagonally.

The upper and/or lower end region of the torsion protection can be configured at least in partial areas as a pipe wrench or pipe wrench socket and/or as a pipe wrench.

The upper end region and/or lower end region may be configured with several steps and have different cross sections. For example, the upper end area may have the shape of a square, with a cylindrical partial part being configured adjacent to the square shape, which has a smaller diameter than the central part, and the lower end area may be configured by example of hexagonal shape.

The attachable bolt and/or the attachable clamping device preferably each have a correspondingly approximately opposite shape. In or on this complementary configured shape, the upper and/or lower end zone of the anti-twist protection can be arranged. In the case of the bolt that can be arranged, the opposite shape is preferably configured in the area of a bolt front side of the bolt. In the case of the clamping device, the opposite shape can be configured, for example, on a cover part and/or an adapter of the clamping device, preferably on the cover part. However, an opposite shape would also be possible in a lower drive unit of the clamping device. The attachable bolt and/or the attachable clamping device preferably have a recess or a through opening configured at least partially complementary to the upper and/or lower end area of the torsion protection. The attachable bolt and/or the attachable clamping device may, for example, have a parallelepiped or honeycomb-shaped recess. The bolt that can be arranged can preferably have a square or hexagonal (blind) perforation or notch in the area of a bolt front side thereof. The clamping device preferably has a square or hexagonal hole, preferably in the area of a cover part thereof, preferably a continuous hole. Correspondingly, the torsion protection has in the upper end region and in the lower end region complementary configured partial regions with the upper and lower front side with a square or hexagonal external contour. However, it can also be provided that the torsion protection has a square or hexagonal recess in its lower end region. A contour configured complementary thereto is then present on the bolt which can be arranged in the form of a square or hexagonal protuberance similar to the end region of a pipe wrench.

The fixing arrangement preferably comprises at least one internal space to house the torsion protection. The internal space can be configured as a well or channel, which can in particular be configured cylindrically, in the fixing arrangement or the clamping device. The torsion protection can preferably be arranged displaceably in the internal space. The torsion protection is preferably arranged entirely or partially in the internal space.

The fixing arrangement preferably comprises at least one fixing unit. The fixing unit is preferably configured for automated tensioning of fixing means. The fixing unit preferably has a determinable turning moment, with which the fixing means are tensioned. The fixing unit preferably comprises at least one drive nut for engagement with a nut or in recesses of a nut and for subsequent tightening of the nut.

The clamping device preferably has a housing with an internal space. The clamping device preferably has at least one cover part and/or an adapter for fixing the twist protection. The cover part and/or the adapter preferably has an opposite or complementary shape corresponding to the shape of the upper end region of the twist protection. The cover part and/or the adapter may preferably have a recess and/or a through opening configured complementary to the shape of the upper end region of the twist protection. On the cover part of the clamping device, the adapter is preferably arranged centrally, more preferably in a longitudinal direction of the clamping device below the cover part. The adapter preferably has an adapter recess for protection against twisting and preferably also a spring element. The housing with the cover part preferably substantially has an open side, which is configured to partially accommodate the attachable bolt. The bolt projection can preferably be determined in the area of the cover part or in an area arranged above, which is covered by a cap. The cover part, the cap and/or the adapter preferably have a through opening for protection against twisting .

The tightening device preferably comprises at least one traction unit for elongating the fixing means. The drive unit has a drive unit internal thread for engagement in the corresponding external bolt thread of a bolt in the region of the bolt boss. The traction unit is preferably arranged in said at least one internal space of the clamping device. To accommodate the torsion protection, the drive unit has, preferably in the direction of the longitudinal extension of the clamping device, at least one protective recess, which runs through the drive unit. The torsion protection is preferably arranged with at least a partial area of the central area in the protective recess.

The twist protection is preferably configured or mounted on the fastening arrangement in such a way that a bolt protrusion (lu) can be measured with the twist protection. For example, the twist protection is preferably mounted displaceably on the fixing arrangement or the clamping device in such a way that, for example, during tensioning, the twist protection is pressed by the bolt, which can be arranged upwards and/or or at least partially outside the fixing arrangement, the bolt projection (lu) being able to be measured or deduced by moving the torsion protection in the fixing arrangement. The upper end region of the torsion protection may comprise at least one marking, which for example shows whether there is sufficient bolt protrusion. The mark may be a color mark.

To determine the bolt projection (lu), the fixing arrangement comprises the sleeve, with which the bolt projection (lu) can be measured. The bushing is arranged around the twist protection. The sleeve is preferably in contact with the front bolt side of the disposeable bolt. The protection against twisting can be arranged in the internal space of the bushing. The bushing is preferably displaceably mounted on the fixing arrangement or the clamping device in such a way that, for example, during tensioning the bushing is pressed upwards and/or by the bolt that can be arranged or its bolt front side. less partially outside the fixing arrangement, the displacement of the bushing in the fixing equipment on the bolt projection (lu) being able to be measured or deduced. Dangerous operating states, which occur in the event of faulty engagement of the drive unit with the bolt, caused by tolerances of the bolts and flanges, as well as the gaps between them, are avoided by providing a determination of the protrusion of bolt.

The fixing arrangement preferably comprises at least one spring element, which is arranged at least in partial areas around the torsion protection. By means of a first spring element, the torsion protection can be pressed against the bolt front side of the bolt that can be arranged during tensioning, so that the torsion protection and the bolt, if necessary after a rotary movement of the torsion protection the torsion, they interlock. The first spring element is in operative connection with the torsion protection. In a cap and/or in the cover part of the clamping device, the first spring element for arranging or pressing the lower end region of the twist protection may be arranged in a recess or on a front side of bolt bolt, preferably in the cap. The cap is arranged above the cover piece, associated with the upper end area of the anti-twist protection. The first spring element is configured in a pre-tensioned manner and presses, for example, against a lock washer, which is supported on a lock ring, which is arranged in a groove of the torsion protection. A second spring element for the arrangement or pressing of the sleeve on the bolt front side of the bolt may be provided on the cap piece and the adapter.

A second spring element for the arrangement or pressing of the sleeve on the bolt front side of the bolt may be arranged on the cap part and/or the adapter, preferably on the cap part and on the adapter. The second spring element is preferably retained in the cap piece or the adapter, preferably in the cap piece. It is pretensioned between this retention and a counter support, which is made available by the bushing, for example by protuberances arranged on its outer perimeter or a protruding ring arranged thereon. The counter support can in turn preferably act on a third spring element, which acts together with the traction unit. By providing a first spring element, which acts together with the anti-twist protection, and a second spring element, which acts together with the bushing, the movements in the longitudinal direction of the fixing arrangement are decoupled from the anti-twist protection. torsion and bushing. In this way, for example by sensors, the bolt protrusion can be determined very accurately by determining a differential length between the sleeve and the anti-twist protection.

An alternative method for determining the bolt protrusion would be to provide a longitudinal perforation along the entire length of the torsion protection, so that, for example, by means of mechanical or optical probes or sensors, a difference with respect to the bolt front side of the bolt can be determined. bolt directed towards the anti-twist protection for the movement of the anti-twist protection. In such an embodiment of the invention, a lower apparatus effort is advantageously required, since only a first spring element has to be present, which is in operative connection with the torsion protection. The first and preferably the only spring element of this embodiment is mounted in a prestressed manner against the traction equipment. It is preferably mounted below, at least partially below, the cap piece and/or the adapter, preferably partially only on the adapter.

The bolt projection can preferably be determined in the area of the cover part or in an area arranged above, which is covered by a cap. According to a first preferred embodiment, the fixing arrangement has a protection against twisting. The torsion protection has a longitudinal extension in the direction of a longitudinal x-axis. The torsion protection extends substantially in the form of a rod in the direction of longitudinal extension. The torsion protection has an upper end zone with an upper front side, a central zone and a lower end zone with a lower front side. The upper end region and the lower end region each form an end region of the longitudinal extension and the central region is arranged between the upper end region and the lower end region. The upper end area is configured such that the torsion protection can be fixed at least rotatably around the longitudinal x-axis by means of a clamping device that can be arranged. The lower end region is configured such that an arrangable bolt can be fixed at least rotatably about the longitudinal x-axis. The lower end region has the shape of a square, whereby the lower front side is substantially rectangular in shape. The central zone extends, starting from the lower end zone, substantially cylindrically in the direction of longitudinal extension to the upper end zone. The central area can be configured in a cylindrical or polygonal shape. The central area has a groove separated from the upper end area. A safety ring can preferably be arranged in the groove. The slot is arranged alternately with circlip on the lower drive unit of the clamping device. The upper end region is configured in a further, alternative embodiment, substantially in two steps. Adjacent to the central zone, the upper end zone has the shape of a square. Adjacent to the square shape, the upper end region has a relatively small cylindrical part. The cylindrical partial part of the upper end region has a diameter somewhat smaller than the central region. This partial part, which is also considered to be the end part of the upper end region, can also be omitted, in particular when a sleeve is provided, as described below.

According to a second preferred embodiment, the fixing arrangement has, in addition to the torsion protection according to the first preferred embodiment, a clamping device. The clamping device comprises at least a housing with a cover part, a pulling unit and a clamping unit. The housing has an internal space, in which the drive unit is arranged. The drive unit has a drive unit internal thread for engagement in the corresponding external bolt thread of a bolt in the region of its bolt projections. In the direction of a longitudinal extension of the torsion protection, the drive unit has a protective recess. The protective cutout extends completely through the drive unit. The torsion protection with its central area is arranged through the protective recess. The housing with the cover part substantially has an open side, which in the case of mounting the clamping device on a nut side of a receiving unit is configured in the direction of the nut side. An adapter is arranged centrally on the cover part of the clamping device. The adapter has an adapter notch. The twist protection is partially arranged in an adapter recess of the adapter. The torsion protection is rotatably fixed by the cover part. A bolt or bolt system may be provided at an end opposite the cap part of the clamping device. The tightening device comprises a clamping unit with a drive nut for engagement in recesses of a nut and for subsequent tightening of the nut.

In a further preferred embodiment, the fixing arrangement has the sleeve, which extends around at least the central region and a part of the upper end region of the twist protection. A bolt projection lu can also be measured with the sleeve. The sleeve is therefore in contact with a bolt front side of a bolt that can be arranged. The bolt projection can preferably be determined in the area of the cover part or in an area arranged above, which is covered by a cap. A first, upper spring element is arranged in the cap for arranging or pressing the lower end area of the torsion protection into the recess of the bolt. The first spring element presses against the disc or the lock washer, which rests on the lock ring, which is arranged in the groove of the torsion protection. A second, lower, spring element for the arrangement or pressing of the sleeve on the bolt front side of the bolt is arranged on the cap piece and the adapter. During tensioning, the bolt to be tensioned presses the torsion protection upwards against the first, upper spring element. The twist protection is then pressed outwards through a through opening in the lid part or a cap. In this way the bolt protrusion Lu and/or an elongation value AI can be indicated or determined.

A torsion protection is proposed which is not within the scope of protection of the claims, as described above, in particular for use in a fixing arrangement according to the invention, and fixing means which are not found within of the protective scope of the claims for tensioning by means of a fixing arrangement, comprising at least one bolt of a bolt system, the bolt having a shape correspondingly opposite to a shape of a lower end region of a twist protection. The torsion protection is preferably configured as described with respect to the fixing arrangement according to the invention. The bolt is preferably configured as described with respect to the fixing arrangement according to the invention. The fixing means preferably comprise at least one receiving device, configured as described above with respect to the fixing arrangement according to the invention.

According to a first preferred embodiment, the fixing means comprise at least one bolt with a bolt front side, which is formed, for example, by a side directed opposite to a counter bearing of the bolt system, on which the bolt It has a central notch. The notch has a rectangular shape. The recess is configured as a polygonal recess, and is preferably configured square or hexagonal. The bolt is preferably configured as an HV bolt.

The bolt system preferably also comprises at least one nut and at least one counter bearing. Directed opposite a bolt end face, for example a counter bearing is arranged on the bolt. The counter bearing preferably has a screw head, which is directly connected to the bolt material. A washer can in each case be arranged above the counter bearing and below the nut.

The receiving device as part of the bolt system preferably comprises a flange connection, more preferably having two flanges. The receiving device preferably has a flange recess, which runs through the two flanges of the flange connection. A bolt of the bolt system is preferably inserted into the flange recess. The nut of the bolt system is preferably associated with one nut side of the housing device and the counter bearing with an opposite side of the housing device.

A use is proposed that is not within the protective scope of the claims of a fixing arrangement for tensioning fixing means, a bolt of a bolt system being fixed during tensioning of a torsion protection. The fixing arrangement, the anti-twist protection and the bolt are preferably configured as described with respect to the fixing arrangement according to the invention and with respect to the fixing means.

The invention proposes according to a second aspect a method for tensioning fixing means, comprising at least one bolt of a bolt system, by means of a fixing arrangement, which is configured according to the first aspect, comprising the steps of

a) insert the bolt into a flange recess of a housing device,

b) mounting a tightening device on a nut side of the housing device,

c) provide a twist protection on the clamping device, so that the twist protection is fixed at least rotatably,

d) provide the anti-twist protection on the bolt, so that the bolt is fixed at least rotatably,

e) tension the fixing means,

f) measure a bolt protrusion of the bolt with the help of the sleeve.

The fixing arrangement, the anti-twist protection, the fixing means and the bolt are preferably configured as with respect to the fixing arrangement according to the invention and with respect to the fixing means described above. The fixing means preferably comprise at least one receiving device, which is configured as described above. Preferably, step c) takes place because the torsion protection is arranged in a cover part or a traction unit of the clamping device. Step e) preferably takes place by means of a clamping device fixing unit. The fixing unit may be configured as described with respect to the fixing device according to the invention. The fixing unit preferably has a determinable turning moment, with which the fixing means are tensioned. The method according to the invention comprises determining a bolt projection. The determination can take place in particular by means of protection against torsion. The method according to the invention may also comprise measuring an elongation value (AI) of the bolt. For this purpose, the bolt protrusion can be measured before and after tensioning, for example by means of the torsion protection. The variation of the bolt protrusion then reflects the elongation or stretching of the bolt. If within the framework of the present invention, also comprising the measurement system according to the invention, the term “approximately” or “substantially” is used with respect to values or ranges of values, therefore It should be understood as what the expert in the field considers customary from a professional point of view in the given context. In particular, deviations from the indicated values of 10%, preferably 5%, more preferably 2% are understood by the terms "approximately" and "substantially".

Additional advantageous configurations emerge from the following drawings. The same parts or parts with the same function may have the same reference numbers. They show:

Figure 1: an embodiment of a torsion protection 20 in a side sectional view; Figure 2: the torsion protection 20 of Figure 1 in a perspective view;

Figure 3: an embodiment of a fixing arrangement 10 according to the invention, as well as a bolt system 82 in a partial lateral section;

Figure 3a: a first detailed view of Figure 3;

Figure 3b: a second detailed view of Figure 3;

Figure 4: an embodiment of an adapter 57 of a clamping device 50 of the fixing arrangement 10 of Figure 3 in a side sectional view; and

Figure 5: an embodiment of fixing means 80 in a side sectional view through a housing device 92.

Figure 1 shows an embodiment of a twist protection 20 in a side sectional view. The torsion protection 20 has a longitudinal extension in the direction of a longitudinal x-axis. The twist protection 20 extends substantially rod-shaped in the direction of longitudinal extension. The torsion protection has an upper end zone 22 with an upper end side 23, a center zone 24 and a lower end zone 26 with a lower front side 27. The upper end zone 22 and the lower end zone 26 They form in each case an end zone of the longitudinal extension and between the upper end zone 22 and the lower end zone 26 the central zone 24 is arranged.

The lower end area 26 has the shape of a square, whereby the lower front side 27 is substantially rectangular in shape. The central zone 24 extends, starting from the lower end zone 26, substantially in a cylindrical manner in the direction of longitudinal extension to the upper end zone 22. The substantially cylindrical central zone, which may also be configured in a polygonal manner, For example, like a square, it has a slot 25 slightly separated from the upper end area 22, but closer to the upper end area 22 than to the lower end area 26. In the slot 25 a ring of security. The upper end region 22 is substantially configured with two steps. Adjacent to the central zone 24, the upper end zone 22 has the shape of a square. Adjacent to the square shape, the upper end region 22 has a relatively small cylindrical part. The cylindrical end part of the upper end area 22 has a diameter somewhat smaller than the central part 24. It serves for a kind of pre-fixing of the torsion protection 20 in a clamping device by acting together with a notch of the tightening device. The upper end area 22 is configured so that the torsion protection 20 that can be arranged is fixable by means of a clamping device 50 (see Figures 3 and 4) at least rotatably around the longitudinal axis x. The lower end region 26 is configured so that a positionable bolt 84 can be fixed at least rotatably about the longitudinal x axis.

Figure 2 shows the twist protection 20 of Figure 1 in a perspective view. The upper end area 22 is illustrated with the upper front side 23, the upper end area 22 presenting the stepped configuration with the cylindrical and the square shape. Adjacent to the upper end region 22, the central region 24 is arranged, which has the groove 25, which extends around it. Otherwise, the lower end region 26 is made adjacent to the central region, which extends as a square.

Figure 3 shows an embodiment of a fixing arrangement 10 according to the invention, as well as a bolt system 82 in a partial lateral section. The clamping device 50 comprises at least one housing 54 with a cover part 56 and a drive unit 60. The housing 54 has an internal space 55, in which the drive unit 60 is arranged. The housing 54 with the Lid part 56 substantially has an open side, which during mounting of the clamping device 50 on a nut side 96 (see Figure 5) of a housing unit, for example, in the form of a flange connection, is configured in the direction of the nut side 96. At an end opposite the cover part 56 of the clamping device 50, the bolt system 82 is arranged. The bolt system 82 comprises a bolt 84, a nut 88 and a counter bearing 86. The counter bearing 86 has a screw head, which is directly connected to the bolt material. The nut 88 surrounds the bolt 84, as this engages with an internal nut thread in an external bolt thread of the bolt 84. The bolt 84 has a bolt projection lu (see Figure 5) above the nut 88 (see Figure 5), which extends into the internal space 55 of the clamping device 50. In the region of the bolt projection lu, the drive unit 60 engages the bolt 84. The drive unit 60 is engaged with its internal thread of the drive unit with the external thread 84 bolt bolt.

The tightening device 50 comprises the clamping unit 52, which substantially surrounds the nut 88. The clamping unit 52 has a drive nut 53, which is configured so that it can engage in recesses of the nut 88 and therefore rotates the nut 88. On a front side of bolt 85, which forms a side directed in the opposite direction to the counter bearing 86 (see figure 5) of the bolt system 82, the bolt 84 has a central recess (which cannot be deduced from the figure 3). The notch has a rectangular shape and extends into the interior of the bolt 84.

In the cover part 56 of the clamping device 50, an adapter 57 is arranged centrally. The adapter 57 has an adapter recess 58 (see Figure 4). A twist protection 20 is arranged between the central recess on the front side of the bolt 85 of the bolt 84 and the adapter recess 58 of the adapter 57. The twist protection 20, which unlike as shown in Figures 1 and 2 does not have a cylindrical end piece in an upper end region 22, it engages with the upper end region 22 in and through the adapter recess 58. A lower end region 26 of the twist protection 20 engages in the recess of the bolt 84. The twist guard 20 is rotatably fixed by the cover piece 56. Furthermore, the bolt 84 is rotatably fixed. for protection against twisting 20.

Between the nut 88 and the cover part 56, the traction unit 60 is arranged in the internal space 55 of the clamping device 50. In the direction of a longitudinal extension of the torsion protection 20, the traction unit 60 has a protective recess 62. The protective recess 62 extends completely through the drive unit 60. The torsion protection 20 with a central area 24 is arranged through the protective recess 62.

Furthermore, a bushing 45 extends around at least the central area 24 and a part of the upper end area 22. The bushing 45 is included in the fixing arrangement 10. With the bushing 45 a projection lu of cap screw. The sleeve 45 rests on the front bolt side 85 of the bolt 84. The bolt protrusion, which is measured on the front bolt side 85 of the bolt 84, can preferably be determined in the area of the cover part 56 or on a area arranged above, which is covered by a cap 59.

Figure 3a shows a detailed view of the fixing arrangement according to Figure 3 in the upper end area 22 of the twist protection 20. A first, upper spring element 40 is arranged in a cap 59 for the arrangement or pressure of the lower end area 26 of the torsion protection 20 in the recess of the bolt 84. The first spring element 40 presses against a disc 29, which rests on a safety ring 28, which engages in the slot 25 shown in Figure 1 and Figure 2. A second, lower, spring element 42 for the arrangement or pressure of the bushing 45 on the front side of bolt 85 of the bolt 84 is arranged on the cap piece 56 and the adapter 57. During tensioning, the bolt to be tensioned presses the torsion protection 20 upwards against the first spring element 40. The twist protection 20 is thus pressed outwards through an unidentified through opening in the cover part 59. In this way the bolt protrusion lu and the elongation value AI are indicated or can be determined.

Figure 3b shows a detailed view of the fixing arrangement according to Figure 3 in the lower end area 26 of the torsion protection 20. The lower end area 26 of the torsion protection 20 is arranged with drag of shape in the notch of bolt 84.

Figure 4 shows an embodiment of an adapter 57 of the clamping device 50 of the fixing arrangement 10 of Figure 3 in a side sectional view. The adapter 57 is arranged in the cover part 56 (see Figure 3) and has an adapter recess 58. The adapter recess 58 extends through the adapter 57, so that at least the torsion protection 20 can be arranged in the adapter recess 58 with the upper end area 22 of the twist protection 20.

Figure 5 shows an embodiment of fixing means 80 in a side sectional view through a housing device 92. The fixing means 80 comprises a bolt system 82 and the housing device 92. The fixing system Bolts 82 has a bolt 84, a nut 88 and a counter bearing 86. The bolt 84 has a front side of bolt 85. The front side of bolt 85 is arranged on the bolt 84 directed in the opposite direction to the counter bearing 86. Above the counterbearing 86 and below the nut 88 a washer not identified in more detail is arranged in each case. The receiving device 92 comprises a flange connection 93, which has two flanges. The receiving device 92 has a flange recess 95, which runs through the two flanges of the flange connection 93. The bolt 84 of the bolt system 82 is inserted in the flange recess 95. The nut 88 of the bolt system 82 is associated with one side of the nut 96 of the housing device 92 and the counter bearing 86 with an opposite side of the housing device 92.

The bolt projection lu is determined by the free side section of the bolt 84 between the front side of bolt 85 and the nut 88. The tightening device 50 is located on the free side section of the bolt or on a thread existing therein. .

The embodiments represented in the figures should not be interpreted in a limiting manner. Rather, the features described therein may be combined with each other and with the features described above to give additional configurations.

Claims (12)

1. Fixing arrangement (10) for tensioning fixing means (80), which comprises at least - a protection against twisting (20), which can be arranged in a clamping device (50), in which - the torsion protection (20) has a longitudinal extension in the direction of a longitudinal axis (x) and an upper end zone (22) with an upper front side (23), a central zone (24) and a zone of lower end (26) with a lower front side (27), - the upper end zone (22) and the lower end zone (26) form, in each case, an end zone of the longitudinal extension and the central zone (24) is arranged between the upper end zone (22) and the lower end area (26), - the upper end area (22) is configured in such a way that the torsion protection (20) can be fixed at least rotatably by means of the clamping device (50) that can be arranged, - the lower end area (26) is configured in such a way that a bolt (84) that can be arranged is fixable at least rotatably, characterized by - the fixing arrangement (10) comprises a bushing (45), which is arranged around the torsion protection (20) and with which a bolt projection (lu) of the bolt (84) can be measured. 2. Fixing arrangement (10) according to claim 1, characterized in that at least the upper and/or lower end area (22, 26) of the torsion protection (20) have at least partial areas a shape, which is configured in a polygonal manner. 3. Fixing arrangement (10) according to one or more of the preceding claims, characterized in that at least the upper and/or lower end area (22, 26) of the torsion protection (20) are configured by at least in partial areas like a pipe wrench or pipe wrench socket and/or like a pipe wrench. 4. Fixing arrangement (10) according to one or more of the preceding claims, characterized in that the fixing arrangement (10) comprises at least one spring element (40), which is arranged at least in partial areas around the protection against twisting (20). 5. Fixing arrangement (10) according to one or more of the preceding claims, characterized in that the fixing arrangement (10) comprises a clamping device (50), the clamping device (50) having an internal space (55) , in which the torsion protection (20) is arranged. 6. Fixing arrangement (10) according to claim 5, characterized in that the clamping device (50) has on a cover piece (56) a shape correspondingly opposite to the shape of the upper end area (22) of the protection against twisting (20). 7. Fixing arrangement (10) according to one or more of claims 5 and 6, characterized in that the tightening device (50) comprises a traction unit (60), which is arranged in the internal space (55) of the device. of tightening (50), and which has a protective notch (62) that extends through the traction unit (60), in which the protection against torsion (20) is arranged at least with the central area (24). 8. Fastening arrangement (10) according to one or more of the preceding claims, characterized in that a bolt projection (lu) can be measured with the anti-twist protection (20). 9. Fixing arrangement (10) according to one or more of the preceding claims, characterized in that the torsion protection (20) is arranged in the internal space of the bushing (45). 10. Fixing arrangement (10) according to one or more of the preceding claims, characterized in that the bushing (45) is displaceably mounted on the fixing arrangement (10) or the clamping device (50). 11. Fastening arrangement (10) according to one or more of the preceding claims, characterized in that an elongation value (AI) can be measured with the torsion protection (20). 12. Method for tensioning fixing means (80), which comprise at least one bolt (84) of a bolt system (82), by means of a fixing arrangement (10), which is configured according to one or more of claims 1 to 11, comprising the following steps a) insert the bolt (84) into a flange notch (95) of a housing device (92), b) mount a tightening device (50) on a nut side (96) of the housing device (92) , c) providing a twist protection (20) on the clamping device (50), so that the twist protection (20) is fixed at least rotatably, d) arranging the anti-twist protection (20) on the bolt (84), so that the bolt (84) is fixed at least rotatably, e) tension the fixing means (80), f) measure a bolt projection (lu) of the bolt (84) with the help of the bushing (45).