Multifunctional fabricated building connecting grouting sleeve

Abstract

This invention relates to the field of building construction technology, specifically to a multifunctional prefabricated building connection grouting sleeve, comprising a cylinder body, an inlet pipe and an outlet pipe on the side wall of the cylinder body, a linkage pipe rotatably mounted on the inlet pipe, a driving mechanism at the head end of the linkage pipe and on the inlet pipe, a check valve mechanism inside the linkage pipe, an anti-overflow component on the outlet pipe, and an alignment component inside the cylinder body. The alignment component includes a first collar, a second collar, and a clamping sleeve. The first and second collars have docking components, and two clamping sleeves are provided, each containing a limiting component and several grout flow holes. This invention abandons the traditional check valve, employing the cooperation of the driving mechanism, linkage pipe, and check valve mechanism to allow the inlet pipe to open or close, effectively preventing grout overflow. The limiting component limits the movement of reinforcing bars of different diameters, ensuring that the reinforcing bars remain coaxial with the cylinder body.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a multifunctional prefabricated building connection grouting sleeve. Background Technology

[0002] Grouting connection technology for reinforcing bars is a core technology for connecting reinforcing bar nodes between components in precast concrete structural systems. It is crucial for the design, production, and construction of precast monolithic structures. Grouting connection refers to the connection between the reinforcing bars and the sleeve using grouting. The transmission of force between the reinforcing bars at both ends of the sleeve depends on the mechanical interlocking and friction between the grout, the reinforcing bars, and the sleeve, as well as the alignment of the reinforcing bar axis with the sleeve axis. Currently, with existing grouting sleeves, a large amount of grout is ejected from the top outlet and bottom injection port upon completion of grouting, resulting in grout waste.

[0003] A prefabricated building construction grouting sleeve, disclosed in patent CN116044094A, specifically includes a cylinder body. A grouting port is fixedly connected to and communicates with the bottom side wall of the cylinder body, and a grout outlet is fixedly connected to and communicates with the top side wall of the cylinder body. The grouting port and the grout outlet are located on the same side of the cylinder body. A check valve is provided inside the grouting port, and an anti-overflow component is fixedly connected to the side of the grout outlet away from the cylinder body. This patent can achieve the purpose of preventing grout from overflowing from the grouting port and the grout outlet.

[0004] However, the above patents still have defects: 1. The ball is driven to block the grouting port by the elastic force of the second spring. However, after the grouting port is filled with grout, the elastic force of the second spring is limited, and the ball cannot block the grouting port, that is, it cannot achieve the purpose of preventing the grouting port from overflowing; 2. After the steel bar is inserted into the first or second clamping sleeve, the conical structure is used to resist the steel bars of different diameters. However, the conical structure cannot keep the steel bar in a vertical position on the axis of the cylinder, that is, the steel bar cannot be limited. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides a multifunctional prefabricated building connection grouting sleeve to solve the problems mentioned in the background art of how to prevent grout from overflowing from the injection port and how to limit the position of the reinforcing bars.

[0006] The technical solution of this invention is:

[0007] A multifunctional prefabricated building connection grouting sleeve includes a cylinder body. A grout inlet pipe and a grout outlet pipe are provided on the side wall of the cylinder body. A linkage pipe is rotatably mounted on the grout inlet pipe. A drive mechanism capable of driving the linkage pipe to rotate is provided at the head end of the linkage pipe and on the grout inlet pipe. A check mechanism capable of opening or closing the grout inlet pipe as the linkage pipe rotates is provided inside the linkage pipe. A detachable anti-overflow component is provided on the grout outlet pipe. A centering component is provided inside the cylinder body. The centering component includes a first collar, a second collar, and a clamping sleeve. A docking component for connecting the two collars is provided on the first and second collars. Two clamping sleeves are provided. A limiting component capable of limiting the movement of steel bars of different diameters is provided inside the clamping sleeves. Several grout flow holes are provided on the clamping sleeves. The first and second collars are both threadedly connected to the inner wall of the cylinder body. The two clamping sleeves are rotatably mounted on the first and second collars, respectively.

[0008] Preferably, the driving mechanism includes a grouting pipe for insertion into the linkage pipe, guide protrusions, and an arc-shaped guide rod. Multiple guide protrusions are provided. A spring is sleeved on the arc-shaped guide rod. A concave annular groove is provided on the outer wall of the grouting pipe, and a connecting piece is provided within the concave annular groove. A rotating ring is provided on the inner wall of the tail end of the linkage pipe, and an arc-shaped notch is provided on the rotating ring. A guide groove is provided on the rotating ring to rotatably engage with the arc-shaped guide rod. Multiple arc-shaped grooves are provided on the inner wall of the head end of the linkage pipe, each at an equal angle along its circumference and slidingly engaging with the guide protrusions. All guide protrusions are evenly distributed along the circumference of the linkage pipe. The rotating ring is rotatably positioned within the concave annular groove. One end of the arc-shaped guide rod is connected to the connecting piece, and the other end of the arc-shaped guide rod is located within the guide groove. The spring is located within the arc-shaped notch.

[0009] Preferably, the check valve mechanism includes a feed pipe, a first baffle, and a second baffle. The feed pipe has an mounting ring on its outer wall at the head end. The outer diameter of the feed pipe is the same as the inner diameter of the slurry inlet pipe. Both the first and second baffles have notches, and the cross-sectional area of ​​the notches is no greater than half the area of ​​the slurry inlet pipe opening. The feed pipe is connected to the linkage pipe through the mounting ring, and the tail end of the feed pipe protrudes beyond the tail end of the linkage pipe. The first baffle is disposed inside the slurry inlet pipe, and the second baffle is disposed at the tail end of the feed pipe. The first and second baffles abut against each other.

[0010] Preferably, the notch is provided, and the cross-section of the notch is semi-circular.

[0011] Preferably, there are two notches, the cross-section of the notches is fan-shaped, and the two notches are arranged diagonally.

[0012] Preferably, there are at least three notches, and all notches are evenly distributed.

[0013] Preferably, the anti-overflow component includes a horizontal frame, within which a horizontal sliding box is slidably disposed. One end of the horizontal sliding box is provided with a filter screen, and the other end of the horizontal sliding box is provided with a first wedge surface. The first wedge surface is provided with a plurality of first ventilation grooves. The top of the horizontal frame is provided with a vertical frame connected to it, within which a vertical sliding box is slidably disposed. The bottom of the vertical sliding box is provided with a second wedge surface that mates with the first wedge surface. The top of the vertical sliding box and the second wedge surface are both provided with second ventilation grooves. The top of the vertical sliding box is provided with an indicator rod that penetrates the top of the vertical frame. One end of the horizontal frame is a closed end, and the other end of the horizontal frame is provided with a connecting pipe that communicates with its interior. The top of the vertical frame is provided with a third ventilation groove, and the connecting pipe is threadedly connected to the outer wall of the slurry outlet pipe.

[0014] Preferably, the docking assembly includes a first connector and a second connector. Both the first connector and the second connector are provided with multiple through ports. The bottom of the first connector is provided with a docking insert, and the top of the second connector is provided with a docking slot that mates with the docking insert.

[0015] Preferably, the top of the mating slot has two symmetrically arranged inner chamfers.

[0016] Preferably, the limiting component includes multiple circular steps with progressively increasing inner diameters, all of which are disposed within the clamping sleeve.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Firstly, this invention abandons the traditional check valve and adopts a combination of a drive mechanism, a linkage pipe, and a check valve mechanism to enable the grout inlet pipe to open or close, effectively preventing grout overflow. It also uses a limiting component to limit the reinforcing bars of different diameters, so that the reinforcing bars can remain coaxial with the cylinder.

[0019] Secondly, when the grouting pipe is inserted, the present invention can cause the linkage pipe to rotate by the cooperation of the guide protrusion and the arc-shaped groove. The rotation of the linkage pipe can cause the notch of the first baffle and the notch of the second baffle to gradually overlap, and then the grout can enter the cylinder. When the grouting pipe is pulled out, the notch of the first baffle and the notch of the second baffle can gradually be staggered, thereby sealing the grouting pipe.

[0020] Thirdly, the present invention uses the first wedge surface of the horizontal sliding box and the second wedge surface of the vertical sliding box to make the indicator rod protrude from the top of the vertical frame, which indicates that the grout is full and grouting needs to be stopped, effectively preventing the grout from overflowing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the multifunctional prefabricated building connection grouting sleeve of the present invention;

[0022] Figure 2 This is an internal schematic diagram of the multifunctional prefabricated building connection grouting sleeve of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the centering component;

[0024] Figure 4 This is a cross-sectional view of the spill prevention component;

[0025] Figure 5 This is a partial breakdown diagram of the spill prevention component;

[0026] Figure 6 This is a partial disassembly diagram of the multifunctional prefabricated building connection grouting sleeve of the present invention. Figure 1 ;

[0027] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0028] Figure 8 This is a partial disassembly diagram of the multifunctional prefabricated building connection grouting sleeve of the present invention. Figure 2 ;

[0029] Figure 9 This is a schematic diagram of the second embodiment with a missing groove;

[0030] Figure 10 This is a schematic diagram of the third embodiment with a missing groove.

[0031] In the picture:

[0032] 1. Cylinder; 11. Grout inlet pipe; 111. Concave annular groove; 112. Connecting piece; 12. Grout outlet pipe; 2. Linkage pipe; 21. Rotating ring; 22. Arc-shaped notch; 23. Guide groove; 24. Arc-shaped strip groove; 3. Drive mechanism; 31. Grouting pipe; 32. Guide protrusion; 33. Arc-shaped guide rod; 34. Spring; 4. Anti-overflow assembly; 41. Horizontal frame; 411. Horizontal sliding box; 412. Filter screen; 413. First wedge surface; 414. First ventilation groove; 42. Vertical frame; 421. Vertical sliding box; 422. Second wedge Surface; 423, Second vent groove; 424, Index rod; 425, Third vent groove; 43, Connecting pipe; 5, Check valve; 51, Material passage pipe; 511, Mounting ring; 52, First baffle; 53, Second baffle; 54, Notch; 6, First set of rings; 7, Second set of rings; 8, Pressing sleeve; 81, Slurry flow hole; 9, Butt joint assembly; 91, First connector; 911, Butt joint insert; 92, Second connector; 921, Butt joint slot; 922, Inner chamfer; 93, Through opening; 10, Circular step; 20, Reinforcing bar. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-10 The present invention will describe the above technical solution in detail through the following embodiments:

[0035] A multifunctional prefabricated building connection grouting sleeve includes a cylinder body 1. A grout inlet pipe 11 and a grout outlet pipe 12 are provided on the side wall of the cylinder body 1. A linkage pipe 2 is rotatably mounted on the grout inlet pipe 11. A drive mechanism 3 capable of driving the linkage pipe 2 to rotate is provided at the head end of the linkage pipe 2 and on the grout inlet pipe 11. A check mechanism 5 capable of opening or closing the grout inlet pipe 11 as the linkage pipe 2 rotates is provided inside the linkage pipe 2. A detachable anti-overflow component 4 is provided on the grout outlet pipe 12. A centering component is provided inside the cylinder body 1, including a first collar 6, a second collar 7, and a clamping sleeve 8. A docking component 9 for docking the two collars is provided on the first collar 6 and the second collar 7. Two clamping sleeves 8 are provided, each containing a limiting component capable of limiting the movement of steel bars 20 of different diameters. Several grout flow holes 81 are provided on the clamping sleeve 8. The first collar 6 and the second collar 7 are both threadedly connected to the inner wall of the cylinder body 1. The two clamping sleeves 8 are rotatably mounted on the first collar 6 and the second collar 7, respectively.

[0036] The present invention abandons the check valve in the prior art and adopts a drive mechanism 3, a linkage pipe 2 and a check valve 5 to enable the slurry inlet pipe 11 to be opened or closed.

[0037] The drive mechanism 3 includes a grouting pipe 31 for insertion into the linkage pipe 2, a guide protrusion 32, and an arc-shaped guide rod 33. Multiple guide protrusions 32 are provided. A spring 34 is fitted onto the arc-shaped guide rod 33. An inner concave annular groove 111 is provided on the outer wall of the grouting pipe 11, and a connecting piece 112 is provided within the inner concave annular groove 111. A rotating ring 21 is provided on the inner wall of the tail end of the linkage pipe 2, and an arc-shaped notch 22 is provided on the rotating ring 21. A guide groove 23 is provided on the rotating ring 21 that rotatably engages with the arc-shaped guide rod 33. Multiple arc-shaped strip grooves 24 are provided on the inner wall of the head end of the linkage pipe 2, with equal angles along their circumference and slidingly engaging with the guide protrusions 32. All guide protrusions 32 are evenly distributed along the circumference of the linkage pipe 2. The rotating ring 21 is rotatably positioned within the inner concave annular groove 111. One end of the arc-shaped guide rod 33 is connected to the connecting piece 112, and the other end of the arc-shaped guide rod 33 is located within the guide groove 23. The spring 34 is located within the arc-shaped notch 22.

[0038] The check valve mechanism 5 includes a feed pipe 51, a first baffle 52, and a second baffle 53. The feed pipe 51 has an installation ring 511 on its outer wall at the head end. The outer diameter of the feed pipe 51 is the same as the inner diameter of the slurry inlet pipe 11. The first baffle 52 and the second baffle 53 are both provided with notches 54. The cross-sectional area of ​​the notches 54 is not greater than half the area of ​​the inlet of the slurry inlet pipe 11. The feed pipe 51 is connected to the linkage pipe 2 through the installation ring 511, and the tail end of the feed pipe 51 protrudes from the tail end of the linkage pipe 2. The first baffle 52 is located inside the slurry inlet pipe 11, and the second baffle 53 is located at the tail end of the feed pipe 51. The first baffle 52 and the second baffle 53 abut against each other.

[0039] When grout needs to be injected into the cylinder 1, the grouting pipe 31 is inserted into the linkage pipe 2. During insertion, all the guide protrusions 32 are inserted into all the arc-shaped grooves 24 respectively. The insertion depth of the grouting pipe 31 gradually increases. The guide protrusions 32 can cause the linkage pipe 2 to rotate through the arc-shaped grooves 24. After the linkage pipe 2 rotates, the notch 54 of the first baffle 52 and the notch 54 of the second baffle 53 change from a staggered state to a gradually overlapping state. At the same time, the spring 34 in the arc-shaped notch 22 is compressed by the side wall of the rotating ring 21, and the grout can enter through the grouting pipe 31. The material enters the feed pipe 31 through the notch 54 of the first baffle 52 and the second baffle 53 and then enters the feed pipe 11. After the grouting is completed, the grouting pipe 31 is removed. When it is removed, the guide protrusion 32 and the arc-shaped groove 24 guide the linkage pipe 2 to rotate. The notch 54 of the first baffle 52 and the notch 54 of the second baffle 53 gradually shift away. Then the first baffle 52 and the second baffle 53 seal the opening of the feed pipe 11. After rotation, the spring 34 presses against the rotating ring 21 with elasticity, thus preventing the linkage pipe 2 from deflecting and causing the opening of the feed pipe 11 to open accidentally.

[0040] Furthermore, the shape of the notch 54 has three embodiments.

[0041] In the first embodiment, a notch 54 is provided, and the cross-section of the notch 54 is semi-circular.

[0042] In the second embodiment, there are two notches 54, the cross-section of the notches 54 is fan-shaped, and the two notches 54 are arranged diagonally.

[0043] In the third embodiment, at least three notches 54 are provided, and all notches 54 are evenly distributed.

[0044] The overflow prevention component 4 prevents slurry from overflowing from the slurry outlet pipe 12. The overflow prevention component 4 includes a horizontal frame 41, a horizontal sliding box 411 slidably disposed within the horizontal frame 41, a filter screen 412 at one end of the horizontal sliding box 411, and a first wedge surface 413 at the other end of the horizontal sliding box 411. The first wedge surface 413 has multiple first ventilation grooves 414. A vertical frame 42 is provided at the top of the horizontal frame 41 and is connected to it. A vertical sliding box 421 is slidably disposed within the vertical frame 42. The bottom of the vertical sliding box 421... The part is provided with a second wedge surface 422 that mates with the first wedge surface 413. The top of the vertical slide box 421 and the second wedge surface 422 are both provided with a second ventilation groove 423. The top of the vertical slide box 421 is provided with an index rod 424 that penetrates the top of the vertical frame 42. One end of the horizontal frame 41 is a closed end. The other end of the horizontal frame 41 is provided with a connecting pipe 43 that communicates with its interior. The top of the vertical frame 42 is provided with a third ventilation groove 425. The connecting pipe 43 is threaded to the outer wall of the slurry outlet pipe 12.

[0045] When the grout outlet pipe 12 is filled with grout, the grout continues to move and pushes the horizontal sliding box 411 to move within the horizontal frame 41. After the horizontal sliding box 411 moves, the first wedge surface 413 and the second wedge surface 422 come into contact. Then the vertical sliding box 421 moves upward within the vertical frame 42, and the index rod 424 also moves upward. At this time, it indicates that the grout is full and grouting should be stopped. During grouting, the filter screen 412 can prevent the grout from flowing out, and the filter screen 412, the first venting groove 414, the second venting groove 423 and the third venting groove 425 are for the discharge of gas.

[0046] The two reinforcing bars 20 are aligned by a butt joint assembly 9. The butt joint assembly 9 includes a first connector 91 and a second connector 92. Both the first connector 91 and the second connector 92 are provided with multiple through holes 93. The bottom of the first connector 91 is provided with a butt joint insert 911, and the top of the second connector 92 is provided with a butt joint slot 921 that mates with the butt joint insert 911.

[0047] As the first set of rings 6 and the second set of rings 7 gradually approach each other, the first connector 91 can be gradually inserted into the docking slot 921 of the second connector 92 through the docking tab 911. In order to facilitate the insertion of the docking tab 911 into the docking slot 921, two symmetrically arranged inner chamfers 922 are provided at the top of the docking slot 921.

[0048] The limiting component includes multiple circular steps 10 with progressively increasing inner diameters. All circular steps 10 are set inside the clamping sleeve 8. The circular steps 10 with different inner diameters limit one end of the steel bars 20 with different diameters, thereby keeping the steel bars 20 and the cylinder 1 coaxial.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional prefabricated building connection grouting sleeve, characterized in that: The device includes a cylinder (1), on which an inlet pipe (11) and an outlet pipe (12) are provided on the side wall. A linkage pipe (2) is rotatably mounted on the inlet pipe (11). A drive mechanism (3) capable of driving the linkage pipe (2) to rotate is provided at the head end of the linkage pipe (2) and on the inlet pipe (11). A check mechanism (5) capable of opening or closing the inlet pipe (11) as the linkage pipe (2) rotates is provided inside the linkage pipe (2). A detachable anti-overflow component (4) is provided on the outlet pipe (12). A centering component is provided inside the cylinder (1). The centering component includes... The first ring (6), the second ring (7), and the clamping sleeve (8) are provided. The first ring (6) and the second ring (7) are provided with a docking component (9) for docking the two. There are two clamping sleeves (8). The clamping sleeve (8) is provided with a limiting component that can limit the movement of steel bars (20) of different diameters. The clamping sleeve (8) is provided with a number of grout flow holes (81). The first ring (6) and the second ring (7) are both threaded to the inner wall of the cylinder (1). The two clamping sleeves (8) are respectively rotatably set on the first ring (6) and the second ring (7). The driving mechanism (3) includes a grouting pipe (31) for insertion into the linkage pipe (2), a guide protrusion (32), and an arc-shaped guide rod (33). Multiple guide protrusions (32) are provided. A spring (34) is sleeved on the arc-shaped guide rod (33). An inner concave annular groove (111) is provided on the outer wall of the grouting pipe (11), and a connecting piece (112) is provided inside the inner concave annular groove (111). A rotating ring (21) is provided on the inner wall of the tail end of the linkage pipe (2), and an arc-shaped notch (22) is provided on the rotating ring (21). The rotating ring (21) is provided with a... The arc-shaped guide rod (33) is rotated and fitted with the guide groove (23). The inner wall of the head end of the linkage tube (2) is provided with multiple arc-shaped strip grooves (24) that are equidistant along its circumference and slide with the guide protrusions (32). All the guide protrusions (32) are evenly distributed along the circumference of the linkage tube (2). The rotating ring (21) is rotatably set in the concave ring groove (111). One end of the arc-shaped guide rod (33) is connected to the connecting piece (112). The other end of the arc-shaped guide rod (33) is located in the guide groove (23). The spring (34) is located in the arc-shaped notch (22). The check valve mechanism (5) includes a feed pipe (51), a first baffle (52), and a second baffle (53). The feed pipe (51) has an installation ring (511) on its outer wall at the head end. The outer diameter of the feed pipe (51) is the same as the inner diameter of the slurry inlet pipe (11). The first baffle (52) and the second baffle (53) are both provided with notches (54). The cross-sectional area of ​​the notches (54) is not greater than half the area of ​​the slurry inlet pipe (11). The feed pipe (51) is connected to the linkage pipe (2) through the installation ring (511), and the tail end of the feed pipe (51) protrudes from the tail end of the linkage pipe (2). The first baffle (52) is located inside the slurry inlet pipe (11), and the second baffle (53) is located at the tail end of the feed pipe (51). The first baffle (52) and the second baffle (53) abut against each other.

2. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The notch (54) is provided, and the cross-section of the notch (54) is semi-circular.

3. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The notch (54) is provided in two parts, the cross section of the notch (54) is fan-shaped, and the two notches (54) are arranged diagonally.

4. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The notch (54) is provided with at least three, and all notches (54) are evenly distributed.

5. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The anti-overflow component (4) includes a horizontal frame (41), a horizontal sliding box (411) is slidably disposed within the horizontal frame (41), a filter screen (412) is provided at one end of the horizontal sliding box (411), a first wedge surface (413) is provided at the other end of the horizontal sliding box (411), a plurality of first ventilation slots (414) are provided on the first wedge surface (413), a vertical frame (42) is provided at the top of the horizontal frame (41) and connected thereto, a vertical sliding box (421) is slidably disposed within the vertical frame (42), and a bottom of the vertical sliding box (421) is provided with a connection to the first wedge surface (414). 413) The second wedge surface (422) is matched. The top of the vertical sliding box (421) and the second wedge surface (422) are provided with a second ventilation groove (423). The top of the vertical sliding box (421) is provided with an index rod (424) that penetrates the top of the vertical frame (42). One end of the horizontal frame (41) is a closed end. The other end of the horizontal frame (41) is provided with a connecting pipe (43) that communicates with its interior. The top of the vertical frame (42) is provided with a third ventilation groove (425). The connecting pipe (43) is threaded to the outer wall of the slurry outlet pipe (12).

6. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The docking assembly (9) includes a first connector (91) and a second connector (92). Both the first connector (91) and the second connector (92) are provided with multiple through ports (93). The bottom of the first connector (91) is provided with a docking insert (911), and the top of the second connector (92) is provided with a docking slot (921) that cooperates with the docking insert (911).

7. The multifunctional prefabricated building connection grouting sleeve as described in claim 6, characterized in that: The top of the docking slot (921) is provided with two symmetrically arranged inner chamfers (922).

8. The multifunctional prefabricated building connection grouting sleeve as described in claim 1, characterized in that: The limiting component includes multiple circular steps (10) with progressively increasing inner diameters, all of which are located inside the clamping sleeve (8).

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