Attachment system for detachably coupling pipe ends to one another to form foundation pile

Abstract

The invention relates to an attachment system (1) for detachably coupling a female pipe end (4) and a male pipe end (5) in the form of a foundation pile to each other, comprising:-corresponding sleeve cavities (6, 7) in the casing of the pipe ends (4, 5); -a coupling element (8) comprising a base body (9) and a spring-loaded element (13) such that, when the male tube end (5) is fitted in the female tube end (4):-an inclined side (10) of the nose (12) of the base body (9) and an edge (23) of the male tube end (5) engage one another in order to move the base body (9) into a release position in which the base body (9) is released from the female tube end (4); the nose (12) of the base body (9) is held in the sleeve cavity (6) of the vaginal tube end (4) against a spring force; and-the limiting element of the male pipe end (5) limits the assembly after which the pipe ends (4, 5) are rotatable relative to each other in order to align the sleeve cavities (6, 7), with the sleeve of the male pipe end (5) being arranged between its edge (23) and its sleeve cavity (7) in order to hold the base body (9) in the release position without locking it until the sleeve cavities (6, 7) are aligned, such that the spring force forces the nose (12) in the sleeve cavity (7) of the male tube end (5) in the coupled position.

Description

Technical Field

[0001] This invention relates to an attachment system for detachably connecting a female pipe end and a male pipe end to form a foundation pile, comprising:

[0002] -The female tube end includes a sleeve, and the sleeve is provided with a sleeve cavity;

[0003] - The male tube end includes a sleeve, and the sleeve is provided with a corresponding sleeve cavity. When the male tube end is assembled into the female tube end, the sleeve cavity can be aligned with the sleeve cavity in the female tube end.

[0004] - A connecting element, attached to the vaginal end and comprising a base and a spring-loaded element, wherein the base is configured, in a free state, to be displaceable within the sleeve cavity of the vaginal end along a displacement direction between the following positions:

[0005] o Connection position, in which the base is pushed out of the sleeve cavity of the female tube end by the nose of the base due to the spring force of the spring-loaded element, so that the nose engages in the corresponding sleeve cavity of the male tube end, thereby connecting the tube ends when the sleeve cavities are aligned relative to each other; and

[0006] o Connection position, in which the nose of the base is forced away from the sleeve cavity of the female tube end due to the spring force of the spring-loaded element, so that the nose engages in the sleeve cavity of the male tube end, thereby connecting the tube ends when the sleeve cavities are aligned relative to each other; and

[0007] o Release position, wherein the nose of the base is held in the sleeve cavity of the vaginal end by the spring force of the spring-loaded element, so that the tube ends can be inserted into each other and removed from each other;

[0008] - A disengagement device configured to shift the substrate between a free state and a locked state, wherein the substrate is held in the released position and prevented from shifting to the engaged position. Background Technology

[0009] For most attachment systems used to detachably connect the male and female ends of a pipe to form a foundation pile, the connecting element must be manually installed and then secured in one manner or another. Examples of attachment systems incorporating such manually installed connecting elements are described and illustrated in WO2022 / 157650A1 and DE29508441U1.

[0010] For example, if 16 connecting elements are used with the attachment system described herein, at least 16 actions must be performed to connect or disconnect the pipe ends using the attachment system.

[0011] To produce foundation piles, considering the fundamental rules of on-site concrete pouring, the reinforcing steel must first be placed in the correct position before concrete can be poured. This means driving steel drill rods into the ground to a specific depth. Foundation construction machines with so-called open-face concrete systems have an opening at the top of the drill motor through which the reinforcing steel can be placed. Once the reinforcing steel is in place, concrete can be poured and the drill rod can be pulled out.

[0012] However, many foundation construction machines lack open-face concrete systems. This means that the drilling motors of these machines do not have openings for placing the reinforcing cage. In practice, the drill rod is typically driven to the desired depth. Concrete is then poured into the drill rod using a so-called closed-face concrete system. Subsequently, the drill rod is pulled out, and the reinforcing cage is pushed into the newly poured concrete. However, this practice violates the fundamental principles mentioned above. In practice, the reinforcing cage often deviates during insertion, resulting in it not being centered on the pile or even at the correct depth. By placing the reinforcing cage after the concrete has been poured, friction between the reinforcing cage and the pile wall can occur, potentially causing soil loosening and mixing into the concrete. This results in poor-quality piles that may not have sufficient bearing capacity for their intended purpose.

[0013] When the male and female ends are attached to the drilling motor of the foundation construction machine and the corresponding female ends are attached to the top of the steel drill rod, the male and female ends are releasably connected to each other to create a foundation pile. The connection can then be released after the drill rod has reached the desired depth, allowing the foundation construction machine to move away from the drill rod. The drill rod then opens at the top, and reinforcing steel can be placed inside. Once the drill rod is in place, the foundation construction machine can move again on the drill rod, allowing it to be reattached for concrete pouring and extraction. However, in practice, manually removing 16 connecting elements for disengagement and then reassembling them for reconnection is excessively time-consuming. This is impractical because of the waiting concrete, which may over-harden before pouring.

[0014] Even for open concrete systems, there is a need for faster and safer pipe-end connections. If the attachment system can be automatically connected to and disconnected from the drill motor of the open concrete system, manual operation at elevated heights is unnecessary. This means that no one in the foundation construction machinery would have to be lifted 20m to install 16 connection elements.

[0015] Several solutions have been proposed to enable automatic and releasable connection of such female and male pipe ends. Typically, these are complex attachment systems that can only be applied to relatively large-diameter pipes.

[0016] EP4004327A1 describes and illustrates a complex attachment system that includes an automatic attachment system, but also includes attachment elements that still require manual operation.

[0017] WO2015086126A2, DE10040529A1 and DE10023467C1 describe complex attachment systems for automatically and detachably connecting pipe ends.

[0018] DE3642387A1, DE19621849A1, and EP2503092A1 describe automated coupling systems for detachably connecting pipe ends that are not very robust because the sleeve cavities in the pipe ends must first be aligned very precisely with each other in order to connect the pipe ends to each other.

[0019] EP1860275A1 describes and illustrates an attachment system according to the preamble of claim 1. However, this is a complex attachment system.

[0020] US 2023 / 0193698 A1 describes a simpler connection method for drill pipe, wherein a drill pipe element having a square cross-section is releasably attached to a cubic connecting sleeve by means of a connecting element, the connecting element being assembled in a connection position in the corresponding sleeve cavity using a spring-loaded element.

[0021] US 3,215,454 A describes a method for connecting the bottom end of an offshore guide pipe to the top end of a drilling assembly in a subsea borehole. This connection can be automatically disengaged hydraulically. However, afterwards, the connection must be manually adjusted laboriously to re-engage. Summary of the Invention

[0022] The purpose of this invention is to provide a simpler attachment system for automatically and detachably connecting pipe ends to form a foundation pile.

[0023] This objective of the invention is achieved by providing an attachment system for detachably connecting the male and female ends of a male pipe to form a foundation pile, the attachment system comprising:

[0024] -The female tube end includes a sleeve, and the sleeve is provided with a sleeve cavity;

[0025] - The male tube end includes a sleeve, and the sleeve is provided with a corresponding sleeve cavity. When the male tube end is assembled into the female tube end, the sleeve cavity can be aligned with the sleeve cavity in the female tube end.

[0026] - A connecting element, attached to the vaginal end and comprising a base and a spring-loaded element, wherein the base is configured, in a free state, to be displaceable within the sleeve cavity of the vaginal end along a displacement direction between the following positions:

[0027] o Connection position, in which the nose of the base is forced away from the sleeve cavity of the female tube end due to the spring force of the spring-loaded element, so that the nose engages in the sleeve cavity of the male tube end, thereby connecting the tube ends when the sleeve cavities are aligned relative to each other; and

[0028] o Release position, wherein the nose of the base is held in the sleeve cavity of the vaginal end by the spring force of the spring-loaded element, so that the tube ends can be inserted into each other and removed from each other;

[0029] - A disengagement device configured to displace the substrate between a free state and a locked state, wherein the substrate is held in the released position and prevented from displacing to the coupled position;

[0030] The substrate has a nose portion with an inclined side, and the male end has a corresponding edge. The inclined side and the edge are configured to engage with each other when the male end is fitted into the female end while the substrate is in a free state, so that the substrate can be moved to a release position without being locked. The male end has a limiting element for restricting the fitting of the male end into the female end, and the sleeve cavity in the corresponding sleeve is configured such that the male end can be fitted into the female end until the limiting element restricts the fitting point, after which the ends can be rotated relative to each other to align with the sleeve cavity. The sleeve of the male end is disposed between the edge of the male end and the sleeve cavity to hold the substrate in the release position when the male end is fitted into the female end, without moving the substrate to a locked state, until the sleeve cavities are aligned with each other, such that when the sleeve cavities are aligned with each other, the substrate is pushed to the connection position by the action of a spring force.

[0031] Therefore, the substrate does not need to be manually or via a complex drive system moved from the locked state to the released position in the free state, so that the male end can be installed in the female end and / or the substrate can be moved to the coupling position when the sleeve cavity is aligned.

[0032] With the base in a free state, when the male end is fitted into the female end, the inclined side of the base nose and the edge of the male end engage with each other to move the base to the release position. Because the base remains free in this state, it can be easily forced into the connection position due to spring force when aligned with the sleeve cavity. This makes the attachment system simpler and more robust, enabling automatic connection of the tube ends to each other.

[0033] Using a limiting element, in this case, restricting the assembly of the male end into the female end does not depend on moving the base body to the connection position, making the attachment system more robust. The assembly movement of the male end into the female end is restricted before moving the base body from the release position to the connection position by aligning the sleeve cavity.

[0034] In this case, the displacement direction of the connecting element preferably extends practically perpendicular to the sleeve of the female tube end. For cylindrical tube ends, this displacement direction preferably extends practically radially relative to the axis of the cylindrical female tube end.

[0035] The female end is typically mounted on the drilling motor of the foundation construction machine, while the male end is mounted on the end of the drill rod, as described above in the discussion of the prior art. In alternative embodiments, the ends may also be mounted on portions of the drill rod that can be joined together to form the drill rod. Where these ends must be inserted underground, it is preferable to protect the attachment system from dust and soil on the outside of the drill rod.

[0036] The edge of the male end preferably has a radius. Alternatively, the edge can be designed, for example, to be beveled, such that the edge has an inclined side.

[0037] In a specific embodiment, corresponding guide devices can be provided for the male tube end and the female tube end to guide the assembly of the male tube end in the female tube end, thereby aligning with the sleeve cavity. Since the base is forced into the connection position when aligning with the sleeve cavity, the tube ends automatically connect with each other.

[0038] In a simplified embodiment, the male end may have an external recess limited by a shoulder, wherein the male end can be fitted into the female end through the external recess so as to fit the male end into the female end, and wherein the shoulder of the male end serves as the limiting element.

[0039] The female end preferably also has an inward recess defined by a shoulder, which corresponds to the outward recess of the male end. The male end can be fitted into the inward recess of the female end by means of its outward recess.

[0040] The connecting element preferably includes a housing that is fixedly attached to the female end and has a cavity that terminates in a sleeve cavity in the female end, wherein a spring-loaded element is arranged in the cavity to extend between the housing and the base.

[0041] To facilitate easy disconnection of the pipe ends, in certain embodiments, the connecting element may include a pulling element that forms part of the disconnection device, wherein the pulling element:

[0042] - The substrate attached to the cavity in the housing;

[0043] - Extends within the housing so that it can be displaced along the displacement direction through a through-hole in the housing;

[0044] - Can rotate relative to the housing; and

[0045] -A guide element is provided outside the housing guide element;

[0046] The housing is provided with a guide ramp extending circumferentially along the through-hole, and the guide element is held against the guide ramp by the spring force of the spring-loaded element for guiding the guide element as the pulling element rotates between a starting point and an ending point. The starting point is closer to the cavity in the displacement direction than the ending point, such that the base body displaces between the connected position and the released position as the pulling element displaces between the starting point and the ending point. At the ending point, the guide element is held more specifically in the released position by the spring force, where displacement toward the connected position is prevented and the base body is locked. The base body only returns to a free state when the guide element moves from the ending point to the starting point.

[0047] The tube end can also be easily disconnected by manually engaging the pulling element.

[0048] Using this embodiment that includes the pulling element, the guiding element can also be simply designed as a retaining element that ensures the substrate will not come out of the sleeve cavity due to spring force.

[0049] Preferably, the pulling element extends beyond the housing, at least in the release position of the connecting element, so that the pulling element can be used as a visual verification element by means of which the position of the connecting element in the release or connection position can be easily visually verified.

[0050] For this embodiment including the traction element, the housing is preferably provided with a limiting portion for restricting the displacement movement of the traction element at the end point.

[0051] Alternatively, a device for automatically and easily disconnecting the connector can also be provided.

[0052] Therefore, in a particular embodiment, the cavity in the housing can be limited by a shoulder serving as the disengagement device toward the sleeve cavity in the female end, wherein the base is provided with a widened portion serving as the disengagement device, the widened portion being configured to engage with the shoulder in the engagement position, and wherein the engagement element includes a hydraulic conduit system that also forms part of the disengagement device and terminates between the shoulder and the widened portion, such that when the base is in the engagement position, when hydraulic pressure is applied to the hydraulic conduit system, a hydraulic chamber is formed between the shoulder and the widened portion, resulting in the base being forced into and held in the release position against the spring force. In this case, the hydraulic pressure at least partially prevents the base from returning to the engagement position. Therefore, the base remains in the locked position until the hydraulic pressure drops to a level that no longer prevents the base from returning to the engagement position, and the base is once again in a free state.

[0053] In practice, such hydraulic piping systems are readily achievable. For this purpose, hydraulic systems similar to those described and illustrated in DE19621849A1 or EP2503092A1 can be used. The systems described therein simplify the attachment system according to the invention because, in this case, only hydraulically driven disengagement of the pipe ends is required. No hydraulic drive is needed to connect the pipe ends. As stated above, connection can be achieved due to spring force.

[0054] In this configuration, to prevent the damping effect of hydraulic pressure, in a preferred embodiment, the base includes a base portion and a piston portion. In this configuration, a spring-loaded element engages with the base portion. The base portion includes a nose portion of the base and is provided with a collar. The piston portion includes the widened portion of the base and is arranged to be displaceable relative to the base in a displacement direction. In the engaged position, the piston portion engages with the collar of the base portion on the side of the hydraulic chamber. The housing is also provided with a ventilation duct that terminates in the cavity on the side of the widened portion where the spring-loaded element is arranged. Additionally, the connecting element includes a second spring-loaded element that presses the piston portion against the shoulder of the housing.

[0055] By preventing the damper effect in this way, it is ensured that after the tube end has been rotated and the sleeve cavity has been aligned during the process, the connecting element can be pushed into the connecting position through the stroke effect when the male tube end is assembled into the female tube end. This stroke effect helps to provide great certainty that the nose is correctly positioned in the corresponding sleeve cavity of the male tube end.

[0056] Alternatively, a pneumatic piping system can be developed in principle as part of a disconnection device to pneumatically drive the disconnection. Alternatively still, a magnetic system can be provided as the disconnection device for automatically disconnecting the coupling element to detach the pipe end.

[0057] In embodiments including the hydraulic piping system, the piping system is preferably at least partially integrated into a sleeve at the female end of the pipe.

[0058] In embodiments including the hydraulic piping system, the coupling element preferably includes a verification element that is attached to or partially forms part of the base in a cavity within the housing, the verification element extending through the housing to be displaceable in a displacement direction, and extending partially outside the housing at least in the release position of the coupling element.

[0059] This verification element allows for easy visual verification of the position of the connecting element in the release or connection position.

[0060] The sleeve cavity in the male end of the attachment system according to the invention is preferably a cavity with a nearly constant cross-section, wherein the nose portion of the substrate near the inclined side has a correspondingly nearly constant cross-section. This cavity can, for example, be designed as a hole, wherein the substrate is designed to be approximately cylindrical next to the inclined side. The nose portion of the substrate near the inclined side is preferably not designed to be conical to prevent the connecting element from being pushed out of the sleeve cavity due to torque when applied.

[0061] The sleeve cavities in the vaginal and male ends are preferably designed to be approximately cylindrical, with the base correspondingly designed to be approximately cylindrical. The nose of the base has a concave rounded end, corresponding to the rounded end of the sleeve in the male end. In this case, the rounded end of the nose does not necessarily have the same radius as the rounded end of the sleeve. The concave rounded end of the nose of the base, corresponding to the rounded end of the sleeve in the male end, prevents the base from rotating within the vaginal end.

[0062] The sleeve cavity in the male end can be configured to extend continuously through the sleeve without a bottom seal. This continuous sleeve cavity can be easily achieved within the sleeve.

[0063] However, preferably, the sleeve cavity in the male end is defined by a bottom sealing end. Using a closed sleeve cavity prevents cement from seeping between the drill pipe and the base material and the sleeve cavity. A second advantage of the closed sleeve cavity is that it utilizes an automated system that provides acoustic verification to hear whether the locking has been correctly achieved. Therefore, the nose will strike the bottom of the closed sleeve cavity and produce an impact sound. When the nose is at the bottom, the base material of the connecting element has moved correctly to the connection position, and the connecting element is securely locked.

[0064] More specifically, the female tube end may be provided with several corresponding sleeve cavities, and the male tube end may be provided with several corresponding sleeve cavities, and the attachment system includes several corresponding connecting elements.

[0065] These sleeve cavities must then be provided in such a way that all the corresponding sleeve cavities can be aligned simultaneously, and all connecting elements can be moved to the connection position simultaneously.

[0066] More specifically, the multiple sleeve cavities in the female tube end can be arranged in a row, one on top of the other, and the multiple corresponding sleeve cavities in the male tube end can also be arranged in a row, one on top of the other.

[0067] Then, the corresponding sleeve cavities in a row can be aligned by rotating the tube ends relative to each other, so that the corresponding connecting elements can be moved to the connection position simultaneously.

[0068] In this configuration, the connector preferably extends along the length of the pipe end, allowing the male pipe end to be easily installed in the female pipe end via this direction. The connecting elements remain in their released position until all connecting elements can be simultaneously moved to their connected positions by rotating the pipe ends relative to each other by aligning all corresponding sleeve cavities. In use, this length direction extends along the height direction of the pile to be formed.

[0069] More specifically, the multiple sleeve cavities in the female tube end can be distributed and arranged along the circumference of the tube sleeve, and the multiple corresponding sleeve cavities in the male tube end can also be distributed and arranged along the circumference of the tube sleeve.

[0070] In this case, these sleeve cavities are preferably distributed in such a way that there is sufficient space between the sleeve cavities so that the substrate can be easily held in the release position between the male end edge and these sleeve cavities through the sleeve.

[0071] Each sleeve cavity in the female tube end is preferably disposed in the inner recess, and each sleeve cavity in the male tube end is preferably disposed in the outer recess.

[0072] The invention will now be explained in more detail by the following detailed description of some embodiments of the attachment system according to the invention. The sole purpose of this specification is to provide illustrative examples and to point out further advantages and details of the invention, and therefore it should in no way be construed as a limitation on the field of application of the invention or on the patent rights as defined in the claims. Attached Figure Description

[0073] In this detailed description, reference numerals are used to refer to the accompanying drawings, wherein:

[0074] - Figure 1 An embodiment of the attachment system according to the invention is shown in perspective, wherein the tube end is not connected;

[0075] - Figure 2 A longitudinal section cut through the connecting element is shown. Figure 1The attachment system in which the male end is partially placed in the female end, and some of the connecting elements have been moved to their release position;

[0076] - Figure 3 A longitudinal section cut through the connecting element is shown. Figure 1 The attachment system in which the pipe ends are connected;

[0077] - Figure 4 for Figure 1 The attachment system is located at the position of the connecting element and through the longitudinal section detail of the connecting element, wherein the base is in the connection position;

[0078] - Figure 5 for Figure 1 The attachment system is located at the position of the connecting element and through the cross-section of the connecting element, wherein the substrate is held in the release position by the sleeve of the male end;

[0079] - Figure 6 Shown in perspective Figure 1 Details of the attachment system at the bottom edge of the vaginal end;

[0080] - Figure 7 It shows Figure 1 A front view of a portion of the female end of the attachment system at the location of several connecting elements, showing how to use a hand tool to engage with the pulling element in order to disengage the tube end;

[0081] - Figure 8 It shows Figure 1 A side view of a portion of the female tube end of the attachment system at the location of some connecting elements, showing how to use a hand tool to engage with a pulling element in order to detach the tube end;

[0082] - Figure 9 Showing more details Figure 1 A side view of a portion of the female end of the attachment system at the location of the connecting element;

[0083] - Figure 10 Shown in more detail with perspective view Figure 1 The female end of the attachment system is located at the position of the connecting element;

[0084] - Figure 11 A portion of a first alternative embodiment of the attachment system according to the invention is shown in perspective, wherein the tube end is not connected at the location of the female tube end;

[0085] - Figure 12 A portion of a second alternative embodiment of the attachment system according to the invention is shown in a longitudinal section cut through the connecting element, where the tube end is not connected at the female end.

[0086] - Figure 13 A cross-section cut through the connecting element is shown. Figure 12 Details of the attachment system, in which the pipe ends are not connected;

[0087] - Figure 14 A cross-section cut through the connecting element is shown. Figure 12 Details of the attachment system, in which the substrate is hydraulically moved to the release position;

[0088] - Figure 15 A longitudinal section cut through the connecting element is shown. Figure 12 Details of the attachment system, in which the pipe ends are not connected;

[0089] - Figure 16 A longitudinal section cut through the connecting element is shown. Figure 12 Details of the attachment system, in which the substrate is hydraulically moved to the release position;

[0090] - Figure 17 A third alternative embodiment of the attachment system according to the invention is shown in perspective, wherein the tube end is not connected;

[0091] - Figure 18 A fourth alternative embodiment of the attachment system according to the invention is shown in perspective, wherein the tube end is not connected;

[0092] - Figure 19 A fifth alternative embodiment of the attachment system according to the invention in a free state is shown in a longitudinal section cut through and at the location of the connecting element, without the male end, wherein the base is in the connected position;

[0093] - Figure 20 A cross-section cut through the connecting element is shown at its location. Figure 19 The attachment system has no male end and is in a free state in which the substrate is in the connected position;

[0094] - Figure 21 A longitudinal section cut through and at the location of the connecting element is shown. Figure 19 The attachment system includes a male end, in a free state, wherein the substrate is in a released position;

[0095] - Figure 22 A cross-section cut through the connecting element is shown at its location. Figure 19 The attachment system includes a male end, wherein the substrate is in the release position;

[0096] - Figure 23A longitudinal section cut through and at the location of the connecting element is shown. Figure 19 The attachment system includes a male end, in a free state, wherein the substrate is in the connected position;

[0097] - Figure 24 A cross-section cut through the connecting element is shown at its location. Figure 19 The attachment system includes a male end, in a free state, wherein the substrate is in the connected position;

[0098] - Figure 25 A longitudinal section cut through and at the location of the connecting element is shown. Figure 19 The attachment system includes a male end, in a locked state, wherein the substrate is in a released position;

[0099] - Figure 26 A cross-section cut through the connecting element is shown at its location. Figure 19 The attachment system includes a male end, wherein the substrate is in the connected position in a locked state. Detailed Implementation

[0100] The attachment systems (1) shown each include a female end (4) and a male end (5). In this case, the female end (4) is attached to the drilling motor (3) of the foundation construction machine, while the male end (5) is located on the end of the drill rod (2).

[0101] In alternative embodiments, the pipe ends may also be located on portions of the drill pipe that can be joined together to form the drill pipe. Where these pipe ends must penetrate underground, it is preferable to protect the attachment system from dust and soil on the outside of the drill pipe.

[0102] The tube ends (4, 5) shown in the diagram have a circular cross-section, but they can also have different cross-sections. Because the tube ends (4, 5) are cylindrical, their design allows for easier relative rotation between the tube ends.

[0103] In the illustrated embodiment, the female end (4) is provided with an inward recess (24) defined by a shoulder (20). The male end (5) is correspondingly provided with an outward recess (25) defined by a shoulder (21) in each case. The male end (5) can be fitted into the inward recess (24) of the female end (4) via the outward recess (25). An inclined side (22) is provided on the edge of the inward recess (24) to facilitate engagement (disengagement). The corresponding edge of the outward recess (25) is provided with a rounded edge (23). Alternatively, inclined sides may be provided for both edges or a rounded edge may be provided for the edge of the inward recess while an inclined side is provided for the edge of the outward recess. The shoulders (20, 21) limit the fitting of the male end (5) into the female end (4). The two ends (4, 5) are similar in size and have finite tolerances. In order to ensure that the tube ends (4, 5) can smoothly mate with each other despite these limited tolerances, grease or oil can be applied to the recesses (24, 25). In an alternative embodiment, tube ends (4, 5) without said recesses (24, 25) can be provided, wherein the assembly of the male tube end (5) in the female tube end (4) can be restricted in different ways.

[0104] In each case, the female end (4) is provided with one or more sleeve cavities (6). These cylindrical sleeve cavities (6) extend through the entire sleeve of the female end (4). In the illustrated embodiment, these sleeve cavities (6) are located in the recess (24) of the end (4).

[0105] The male end (5) is provided with one or more corresponding sleeve cavities (7) in each case. In the illustrated embodiment, these sleeve cavities (7) are designed to terminate at and in this case be confined by the bottom end cap (34). In an alternative embodiment, these sleeve cavities (7) extend through the entire sleeve of the male end (5). In the illustrated embodiment, these sleeve cavities (7) are located in the outer recess (25) of the end (5).

[0106] In the illustrated embodiment, the sleeve cavities (6, 7) have a cylindrical design. In alternative embodiments, the sleeve cavities (6, 7) may also have different shapes.

[0107] The sleeve cavities (6, 7) are arranged such that the corresponding male sleeve cavity and female sleeve cavity (6, 7) can be arranged in a straight line with each other. In this case, each sleeve cavity (7) in the male end (5) of the illustrated embodiment is adjacent to the corresponding sleeve cavity (6) in the female end (4).

[0108] For each pair of corresponding sleeve cavities (6, 7) that can be arranged in a straight line with each other, the attachment system (1) shown includes a connecting element (8).

[0109] The connecting element (8) is attached to the female end (4) in each case and includes a base (9) and a spring-loaded element (13), by means of which the base (9) is configured to be displaced in the sleeve cavity (6) in the female end (4) along the displacement direction (X). The displacement direction (X) is radial relative to the axis of the cylindrical female end. In the free state, the base (9) can be displaced between the following positions in this case:

[0110] - Connection position, in which, due to the spring force of the spring-loaded element (13), the base (9) is pushed out of the sleeve cavity (6) of the female end (4) by the nose (12) of the base (9), so that the nose (12) engages in the corresponding sleeve cavity (7) of the male end (5), thereby connecting the tube ends (4, 5) when the sleeve cavities (6, 7) are aligned relative to each other; and

[0111] - Release position, in which the nose (12) of the base (9) is held in the sleeve cavity (6) of the vaginal end (4) against the spring force of the spring loading element (13), so that the tube ends (4, 5) can be inserted into and removed from each other.

[0112] The nose (12) of the base (9) is provided with an inclined side (10) configured to engage with the edge (23) of the male end (5) when the male end (5) is fitted into the female end (4) to move the base (9) to a release position. A sleeve of the male end (5) is provided in each case between the edge (23) and the corresponding sleeve cavity (7) of the male end (5) to hold the base (9) in the release position while it is in a free state when the male end (5) is fitted into the female end (4) until the corresponding sleeve cavities (6, 7) are aligned with each other.

[0113] In the illustrated embodiment, the connecting element (8) in each case includes a housing (14) disposed in a recess (36) in the female end (4) and fixedly attached to the female end (4) by screws (26). The housing (14) is provided with a cavity (30) that terminates in a sleeve cavity (6) in the female end.

[0114] A spring-loaded element (13) is arranged in the cavity (30) in each case to extend between the housing (14) and the base (9). In the illustrated embodiment, the spring-loaded element (13) is a compression spring (13) that extends concentrically with the sleeve cavity (6) and the base (9). Obviously, other suitable spring-loaded elements are conceivable. Alternatively, two or more springs may be provided as spring-loaded elements. For example, if two springs are provided as spring-loaded elements, in the case of a cylindrical sleeve cavity (6), these springs are preferably arranged on both sides of the axis of the cylindrical sleeve cavity (6).

[0115] Furthermore, in each embodiment, a verification element (15, 31, 44) is mounted on the base (9) or a portion of the base (9) within a cavity (30) in the housing (14). In the first four embodiments shown, the verification element (15, 31) is connected by means of a threaded connection (35). In the fifth embodiment shown, the verification element (44) is part of the base (9). The verification element (15, 31) extends through the housing (14) so ​​that it can be displaced in the displacement direction (X) through a through-hole (38) in the housing (14). At least in the released position, the verification element (15, 31, 44) extends partially outside the housing (14).

[0116] Except for the inclined side (10), the nose (12) of the base (9) has a virtually constant cross-section that corresponds to the cross-section of the sleeve cavity (7) in the male end (5). For the cylindrical sleeve cavity (7), the base (9) is accordingly designed to be substantially cylindrical.

[0117] The nose (12) of the substrate (9) is preferably provided with a concave chamfer (11), which corresponds to the chamfer of the sleeve of the male end (5), such as in Figures 5 to 6 As can be seen in the image. In this case, the concave rounding (11) of the nose (12) does not necessarily have the same radius as the rounding of the sleeve. As long as the concave rounding (11) of the nose (12) is configured such that the sleeve can prevent the base (9) from rotating in the female end (4), the concave rounding (11) can be slightly offset from it. Therefore, the same connecting element (8) with a well-selected concave rounding (11) of the nose (12) can be produced, which can be used in various attachment systems (1) including tube ends (4, 5) with various diameters.

[0118] In the illustrated embodiments, the sleeve cavities (6, 7) are arranged in such a way that the male end (5) can be fitted into the female end (4), wherein the connecting element (8) is initially held next to the sleeve cavity (7) at the location of the closed area of ​​the sleeve of the male end (5).

[0119] like Figure 1 , Figure 17 , Figure 18 , Figure 21 and Figure 22 As shown, the female end (4) is positioned above the male end (5) in this case, causing the sleeve cavity (6) in the female end (4) to shift relative to the sleeve cavity (7) in the male end (5). In this case, the base (9) of the connecting element (8) is in a free state in each case. The connector on the drill motor (3) moves downward, causing the male end (5) to slide into the female end (4). When the male end (5) is assembled into the female end (4) in this way, the base (9) will first move to the release position by engaging the edge (23) of the male end (5) with the inclined side (10), in which case the base (9) will not move to the locked state. In this way, the verification elements (15, 31) are also pushed outward as visual verification, as in Figure 2 As can be seen in the text.

[0120] Subsequently, when the male end (5) is assembled into the female end (4), it can be ensured that the connecting element (8) remains close to the sleeve cavity (7) in the closed area until the shoulder (20, 21) as a limiting element restricts the assembly of the male end (5) into the female end (4). In this case, the sleeve of the male end (5) holds the base (9) of the connecting element (8) in the released position, and in this case, the base (9) will not move into the locked state. Figure 1 and Figure 18 In this embodiment, the vaginal end (4) can move straight downwards. Figure 17 In this embodiment, the vaginal end (4) must move downwards in a spiral manner. During the downward sliding motion, the concave rounding (11) on the nose (12) prevents the base (9) from rotating within the housing (14).

[0121] Once the male end (5) is fully pushed into the female end (4), the shoulders (20, 21) of the two ends (4, 5) will abut against each other, and all verification elements (15, 31) will be pushed outward.

[0122] After the pipe ends (4, 5) have been assembled inside each other, the female pipe end (4) can then be rotated to align with the sleeve cavities (6, 7). For this purpose, the drill motor (3) can perform a rotational motion. During alignment, the base (9) of the connecting element then moves to the connection position. Once the sleeve cavity (6) of the female pipe end (4) is aligned with the sleeve cavity (7) in the male pipe end (5), the spring (13) in the connecting element (8) pushes the base (9) into the corresponding sleeve cavity (7) without requiring manual operation first. In this way, the attachment system (1) is fully locked in one movement. Visually, this can be perceived by the fact that all verification elements (15, 31, 44) have retracted inward, as Figure 3 As can be seen in the image. The bottom end (34) in the sleeve cavity (7) of the male end (5) can also be configured such that the base (9) strikes the bottom end (34) at the connection position. As a result, a banging noise is generated during connection as an auditory verification to hear whether the locking has been satisfactorily achieved.

[0123] In such Figure 18 In the illustrated embodiment, the female end (4) includes a single sleeve cavity (6) containing a connecting element (8) disposed therein, and the male end (5) includes a single corresponding sleeve cavity (8). Optionally, in this case, the male end (5) may also be provided with several similar sleeve cavities (7) so that the connecting element (8) can be locked in one or more sleeve cavities (7) by engaging the base (9) in the cavity.

[0124] In such Figure 17 In the illustrated embodiment, the female tube end (4) has three rows of spirally arranged sleeve cavities (6), each row containing three cavities; the male tube end (5) has three corresponding rows of spirally arranged sleeve cavities (7), each row also containing three cavities. In this case, these rows are arranged to be offset from each other by more than 120°. In this case, the female tube end (4) can be arranged on top of the male tube end (5), the sleeve cavity (6) is offset from the sleeve cavity (7) of the male tube end (5) by more than 60°, and after the shoulder (20, 21) restricts the assembly, it can be further rotated more than 60° relative to the male tube end (5) to lock the connecting element (8), thereby connecting the tube ends (4, 5) to each other.

[0125] exist Figure 1In the illustrated embodiment, the female tube end (4) has four rows of vertically arranged sleeve cavities (6), each row containing four cavities, and the male tube end (5) has four rows of correspondingly spirally arranged sleeve cavities (7), each row also containing four cavities. In this case, the cavities in these rows are arranged offset from each other by more than 90°. In this case, the female tube end (4) can be arranged on top of the male tube end (5), the sleeve cavity (6) is offset from the sleeve cavity (7) of the male tube end (5) by more than 45°, and after the shoulder (20, 21) restricts the fit, it can be further rotated by more than 45° relative to the male tube end (5) to lock the connecting element (8), thereby connecting the tube ends (4, 5) to each other.

[0126] In an alternative embodiment (not shown), a corresponding guide may be provided for the tube ends (4, 5) to guide the male tube end (5) into the female tube end (4) and / or to align the sleeve cavity (6, 7).

[0127] Therefore, for example, using such Figure 17 and 18 The sleeve cavities (6, 7) positioned as shown in the embodiment can be provided with a guide device by which the tube ends (4, 5) can be assembled with each other only when the respective sleeve cavities (6, 7) are precisely positioned above each other and in this case axially displaced relative to each other until the connecting element (8) is engaged.

[0128] Alternatively, for example, one could utilize such as Figure 1 and Figure 17 The sleeve cavities (6, 7) positioned as shown in the embodiment provide a guiding device by which the tube ends (4, 5) can be displaced or rotated relative to each other in the longitudinal direction, wherein the sleeve cavities (6, 7) are aligned relative to each other at the end of the rotational movement of the tube ends (4, 5).

[0129] Such a guiding device can be provided, for example, in the form of a groove on the outer sleeve surface of the male end (5) and a corresponding pin-shaped protrusion on the inner sleeve surface of the female end (4), the protrusion being used to engage the groove, and vice versa.

[0130] The disconnection of the tube ends (4, 5) can be achieved in various ways by various possible disconnection devices. In each case, these disconnection devices are configured to shift the base (9) between a free state and a locked state, wherein the base (9) is held in the released position and prevented from shifting to the connected position.

[0131] In the first illustrated embodiment, the verification element (15) is also configured as a pull element (15), which forms part of the disengagement device, and for this purpose, the pull element is provided with an engagement element (16), such as Figure 7 and Figure 8As shown, a hand tool (27) can engage with the engagement element to move the base (9) to the release position. For this purpose, the pulling element (15) is arranged to rotate relative to the housing (14), and a guide element (17) is provided outside the housing (14). The housing (14) is provided with a guide ramp (18) extending circumferentially along a through-hole (38) in which the pulling element (15) is disposed for displacement. The guide element (17) is held against the guide ramp (17) by the spring force of a spring-loaded element (13) to guide the pull element (15) as it rotates between the start and end points. In the displacement direction (X), the start point is closer to the cavity (30) than the end point, such that as the pull element (15) shifts between the start and end points, the base (9) shifts between the engagement position and the release position. The guide element (17) is also configured as a retaining element, which ensures that the base (9) will not be pulled out of the sleeve cavity (6) due to spring force. The housing (14) is also provided with a limiting part (19) for limiting the displacement movement of the pulling element (15) at the end point. At the end point, the base (9) is held in the released position, more specifically by spring force, preventing displacement to the connected position and the base (9) is in a locked state. The base (9) only returns to the free state when the guide element (17) moves from the end point back to the starting point.

[0132] Instead of configuring the pulling element (15) so that it can engage with a hand tool (27), the pulling element (15) may also be provided with a handle (37), such as Figure 11 As in the implementation method.

[0133] By performing a rotational movement on the pulling element (15) using a hand tool (27) or a handle (37), the guide element (17) of the pulling element (15) is guided over the guide ramp (18) of the housing (14), thereby pulling the base (9) backward. At the end of the guide ramp (18), a flat side surface (41) is provided, making it easier for the pulling element (15) to be held in that position so as to keep the base (9) in a locked state. In an alternative embodiment that includes a pulling element (15) with a handle (37), the guide ramp (18) may also be omitted, and the rotational and pulling movements required to displace the base (9) can be performed by the handle (37). In this case, a retaining element may be provided to keep the base (9) in a locked state.

[0134] If all the connecting elements (8) of the attachment system (1) are placed in this position, the male end (5) can slide out of the female end (4).

[0135] Once all connecting elements (8) have returned to the free state, with the base (9) in the connected position, the attachment system (1) can be reconnected.

[0136] Instead of the disengagement device including the tension element (15) shown herein, alternative disengagement devices similar to those described and shown in EP1860275A1 or US 2023 / 0193698A1 may also be provided.

[0137] Instead of manually disconnecting the attachment system (1) according to the invention, it can also be disconnected in a fully automatic manner, for example by a hydraulic mechanism. For this purpose, hydraulic systems described and shown, for example, in DE19621849A1 or EP2503092A1 are suitable, as these systems can be simplified since only the disconnection of the pipe ends now requires hydraulic actuation. As mentioned above, hydraulic actuation is not required to connect the pipe ends (4, 5).

[0138] For hydraulic (fully automatic) disconnection, the female end (4) is provided with a hydraulic piping system (28), which forms part of the disconnection device. This hydraulic piping system (28) is preferably at least partially integrated into the sleeve of the female end (4), such as in… Figure 12-16 As in embodiments 19-26, hydraulic oil can flow through the hydraulic piping system (28) via the drill motor (3) or via a hydraulic hose to be connected separately.

[0139] The cavity (30) in the housing (14) is limited by a shoulder (33) facing the sleeve cavity (6) in the female end (4), and the base (9) is provided with a widening (32) configured as a piston in the cavity. In the engaged position, the widening (32) engages with the shoulder (33). The hydraulic piping system (28) terminates in the connecting element (8) between the shoulder (33) and the widening (32). By allowing hydraulic oil to flow in the hydraulic piping system (28), a hydraulic chamber (29) is formed between the shoulder (33) and the widening (32), and when the base (9) is in the engaged position, the hydraulic chamber (29) is filled with oil, resulting in the base (9) being forced to the release position under hydraulic pressure and against the spring force, and preventing displacement to the engaged position. As a result, the base (9) moves to the locked state.

[0140] When the hydraulic pressure is removed and the base (9) is thus returned to its free state, the base (9) returns to the connected position by spring force, and the attachment system (1) can then be reconnected as described above.

[0141] exist Figure 12-16In the illustrated embodiment, the housing (14) of the hydraulic mechanism is provided with a sealing plug (39) for safety reasons. If the sealing plug (39) is removed, a tool can be screwed into the thread (40) in the base (9). With the aid of this tool, the base (9) can be manually pulled back in case of problems or lack of hydraulic pressure.

[0142] exist Figure 19-26 In this configuration, the substrate (9) is also configured as a verification element (44) which is directly provided with the said thread (40) so that the substrate (9) can be manually pulled back in case of problems or insufficient hydraulic pressure.

[0143] To prevent the damping effect of hydraulic pressure during reconnection of the connecting element (8), the base (9) in the fifth illustrated embodiment includes a base (91) and a piston portion (92). The spring-loaded element (13) engages with the base (91), and the base (91) includes the nose (12) and is provided with a collar (45). The piston portion (92) includes the widened portion (32) and is arranged to be displaceable relative to the base (91) along the displacement direction (X). In the connected position, the piston portion (92) on the hydraulic chamber (29) side engages with the collar (45). The housing (14) is also provided with a ventilation duct (43), which terminates in a cavity (30) on the side of the widened portion (32) where the spring-loaded element (13) is arranged. Additionally, the connecting element (8) includes a second spring-loaded element (42) that forces the piston portion (92) toward the shoulder (33) of the housing (14).

[0144] As a result, when there is no hydraulic pressure, the second spring-loaded element (42) pushes the piston portion (92) back. In this case, the piston portion (92) slides over the base (91) but is not fixedly connected to the base (91). When the hydraulic chamber (29) is filled with hydraulic oil, the collar (45) on the base (91) simultaneously pushes the base (91) backward.

[0145] In a free state, with the matrix (9) in the connected position, such as Figure 19 and 20 As shown, the first mentioned spring loading element (13) pushes the base (9) and its nose (12) out of the sleeve cavity 7 of the vaginal end (4).

[0146] When the male end (5) is pushed into the female end (4), as Figure 21 and Figure 22As shown, due to the fact that the inclined side (10) engages with the male end (5), the base (91) and its nose (12) of the base (9) are pushed back into the sleeve cavity (7) of the female end (4). In this case, the base (91) can move freely backward without the piston part (92) because the base (91) is not connected to the piston part (92).

[0147] When the male end (5) and the female end (4) are subsequently rotated relative to each other, the sleeve cavities (6, 7) are aligned relative to each other. Once these sleeve cavities (6, 7) are aligned, the base (91) is pushed forward by the spring-loaded element (13) mentioned earlier and is thus introduced into the corresponding sleeve cavity (7) of the male end (5).

[0148] In order to disengage the connecting element (8) again, the hydraulic chamber (29) is filled with oil via the hydraulic conduit (28), and the piston portion (92) is pushed backward in this manner. In this way, due to the fact that the piston portion (92) engages with its collar (45), the base (91) is simultaneously pushed backward. In this case, air from the cavity (30) escapes via the ventilation conduit (43). As a result, the male end (5) can be removed from the female end (4).

[0149] In order to subsequently reconnect the connecting element (8) and release the hydraulic pressure, in this case, the second spring-loaded element (42) pushes back the piston (92) so that the base (9) returns to the free state.

[0150] By preventing the damper effect in this way, it is ensured that after the tube ends (4, 5) are rotated and the sleeve cavities (6, 7) are aligned in this case, the stroke effect can be used to force the connecting element (8) into the connecting position when the male tube end (5) is assembled into the female tube end (4). This stroke effect helps to provide great certainty that the nose (12) is correctly positioned in the corresponding sleeve cavity (7) in the male tube end (5).

[0151] In the illustrated embodiment, the second spring loading element (42) is a compression spring (42) that extends concentrically with the sleeve cavity (6) and the base (9). Obviously, other suitable spring loading elements are conceivable. Alternatively, two or more springs may be provided as the second spring loading element. For example, if two springs are provided as the second spring loading element, in the case of a cylindrical sleeve cavity (6), these springs are preferably arranged on both sides of the axis of the cylindrical sleeve cavity (6).

[0152] For automatic disconnection of the connector ends (4, 5), a pneumatic piping system can also be developed in a similar manner, forming part of the disconnection device to pneumatically drive the disconnection. Alternatively, a magnetic system can still be provided as the disconnection device for automatically disconnecting the connecting elements to detach the connector ends.

Claims

1. An attachment system (1) for detachably connecting the female end (4) and the male end (5) to form a foundation pile, comprising: - The female tube end (4) includes a tube sleeve, and the tube sleeve is provided with a sleeve cavity (6); - The male end (5) includes a sleeve, and the sleeve is provided with a corresponding sleeve cavity (7). When the male end (5) is assembled into the female end (4), the corresponding sleeve cavity (7) can be aligned with the sleeve cavity (6) in the female end (4). - A connecting element (8) is attached to the vaginal end (4), and the connecting element (8) includes a base (9) and a spring-loaded element (13), by means of the spring-loaded element (13), the base (9) being configured to be displaceable in the sleeve cavity (6) in the vaginal end (4) in a free state between the following positions along the displacement direction (X): i. Connection position, in which the base (9) is pushed out of the sleeve cavity of the female tube end (4) by the nose (12) of the base (9) due to the spring force of the spring loading element (13), so that the nose (12) engages in the corresponding sleeve cavity (7) of the male tube end (5), thereby connecting the tube ends (4, 5) when the sleeve cavities (6, 7) are aligned with each other; and ii. Release position, wherein the nose (12) of the base (9) is held in the sleeve cavity (6) of the vaginal end (4) against the spring force of the spring loading element (13), such that the tube ends can be inserted into and removed from each other; - A disengagement device configured to displace the base (9) between the free state and the locked state, wherein the base (9) is held in the released position and prevented from displacing to the coupled position; The base (9) is characterized in that its nose (12) is provided with an inclined side (10), and the male end (5) is provided with a corresponding edge (23), wherein the inclined side (10) and the edge (23) are configured to engage with each other when the male end (5) is fitted into the female end (4) while the base (9) is in a free state, so as to move the base (9) to the release position without placing the base (9) in the locked state, wherein the male end (5) is provided with a limiting element (21) for limiting the fitting of the male end (5) into the female end (4), wherein the sleeve cavity ( 6, 7) are configured in the corresponding sleeves such that the male end (5) can be fitted into the female end (4) until the limiting element (21) restricts the point of fitting, wherein the ends are then rotatable relative to each other to align the sleeve cavities (6, 7), and wherein the sleeve of the male end (5) is disposed between the edge (23) of the male end (5) and the sleeve cavity (7) to hold the base (9) in the released position when the male end (5) is fitted into the female end (4) without moving the base (9) to the locked position until the sleeve cavities (6, 7) are aligned with each other, such that when the sleeve cavities (6, 7) are aligned with each other, the base (9) is pushed to the engagement position by spring force.

2. The attachment system (1) according to claim 1, characterized in that, The male end (5) is provided with an external recess (25) limited by a shoulder (21), and the male end (5) can be fitted into the female end (4) by means of the external recess (25) so as to fit the male end (5) into the female end (4), wherein the shoulder (21) of the male end (5) serves as the limiting element (21).

3. The attachment system (1) according to any one of the preceding claims, characterized in that, The connecting element (8) includes a housing (14) which is fixedly attached to the vaginal end (4) and has a cavity (30) that terminates in the sleeve cavity (6) in the vaginal end (4), wherein the spring-loaded element (13) is arranged in the cavity (30) to extend between the housing (14) and the base (9).

4. The attachment system (1) according to claim 3, characterized in that, The connecting element (8) includes a pulling element (15) forming part of the disengagement device, wherein the pulling element: - Attached to the base (9) in the cavity (30) within the housing (14); - Extends within the housing (14) to pass through a through-hole (38) in the housing (14) along the displacement direction (X); - It can rotate relative to the housing (14); and -A guide element (17) is provided on the outside of the housing (14); The housing (14) is provided with a guide ramp (18) extending circumferentially along the through hole (38), and the guide element (17) is held against the guide ramp (18) by the spring force of the spring loading element (13) for guiding the guide element (17) when the pulling element (15) rotates between the start point and the end point, wherein the start point is closer to the cavity (30) in the displacement direction (X) than the end point, such that when the pulling element (15) shifts between the start point and the end point, the base (9) shifts between the connection position and the release position.

5. The attachment system (1) according to claim 4, characterized in that, The housing (14) is provided with a limiting part (19) for limiting the displacement movement of the pulling element (15) at the end point.

6. The attachment system (1) according to claim 3, characterized in that, The cavity (30) in the housing (14) facing the sleeve cavity (6) in the female end (4) is limited by a shoulder (33) serving as the disengagement device, wherein the base (9) is provided with a widening (32) serving as the disengagement device, the widening (32) being configured to engage with the shoulder (33) in the engagement position, and wherein the engagement element (8) includes a hydraulic piping system (28) which also forms part of the disengagement device and terminates between the shoulder (33) and the widening (32), such that when the base (9) is in the engagement position, when oil pressure is applied to the hydraulic piping system (28), a hydraulic chamber (29) is formed between the shoulder (33) and the widening (32), resulting in the base (9) being forced into and held in the release position against spring force.

7. The attachment system (1) according to claim 6, characterized in that, The base (9) includes a base (91) and a piston portion (92), wherein the spring-loaded element (13) engages with the base (91), and the base (91) includes the nose (12) and is provided with a collar (45), and wherein the piston portion (92) includes the widened portion (32) and is arranged to be displaceable relative to the base (91) along the displacement direction (X), and is arranged to engage with the collar (45) on one side of the hydraulic chamber (29) in the connected position, wherein the housing (14) is provided with a ventilation duct (43) that terminates in the cavity (30) on the side of the widened portion (32) where the spring-loaded element (13) is arranged, and wherein the connecting element (8) includes a second spring-loaded element (42) that pushes the piston portion (92) toward the shoulder (33) of the housing (14).

8. The attachment system (1) according to claim 6 or 7, characterized in that, The hydraulic piping system (28) is at least partially integrated into the sleeve of the female end (4).

9. The attachment system (1) according to any one of claims 6 to 8, characterized in that, The connecting element (8) includes verification elements (15, 31, 44) that are attached to or form part of the base (9) in the cavity (30) in the housing (14), the verification elements (15, 31, 44) extending through the housing (14) so ​​as to be displaced along the displacement direction (X) and extending partially to the outside of the housing (14) at least in the release position of the connecting element (8).

10. The attachment system (1) according to any one of the preceding claims, characterized in that, The sleeve cavity (7) in the male end (5) is a cavity with an almost constant cross-section, and the nose (12) of the base (9) near the inclined side (10) has a corresponding almost constant cross-section.

11. The attachment system (1) according to any one of the preceding claims, characterized in that, The sleeve cavity (6) in the female tube end (4) and the sleeve cavity (7) in the male tube end (5) are designed to be approximately cylindrical. The base (9) is correspondingly designed to be approximately cylindrical, and the nose (12) of the base (9) is provided with a concave rounded end (11), which corresponds to the rounded end of the sleeve of the male tube end (5).

12. The attachment system (1) according to any one of the preceding claims, characterized in that, The sleeve cavity (7) in the male end (5) is defined by the bottom sealing end (34).

13. The attachment system (1) according to any one of the preceding claims, characterized in that, The female tube end (4) is provided with multiple corresponding sleeve cavities (6), the male tube end (5) is provided with multiple corresponding sleeve cavities (7), and the attachment system (1) includes multiple corresponding connecting elements (8).

14. The attachment system (1) according to claim 13, characterized in that, The multiple sleeve cavities (6) in the female tube end (4) are arranged in a row on top of each other, and the multiple corresponding sleeve cavities (7) in the male tube end (5) are arranged in a row on top of each other.

15. The attachment system (1) according to claim 13 or 14, characterized in that, The multiple sleeve cavities (6) in the female end (4) are arranged along the circumference of the sleeve, and the multiple corresponding sleeve cavities (7) in the male end (5) are arranged along the circumference of the sleeve.

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