Butt joint and prefabricated component assembly having same

Abstract

The present invention discloses a docking piece and a prefabricated component combination with the docking piece, wherein the docking piece comprises: a connecting sleeve, a stopper, an insert rod and a stopper, wherein a reverse stopper surface is formed on the inner end of the stopper; an anti-slipping clamping surface is formed on the outer surface of the first diameter-reducing section of the insert rod; the stopper has an outer wedge surface and an inner wedge surface; the angle β1 between the inner wedge surface contour generatrix and the outer wedge surface contour generatrix on the stopper is greater than the angle β2 between the reverse stopper surface contour generatrix and the anti-slipping clamping surface contour generatrix, and when the docking piece is subjected to an axial pulling force, the outer wedge surface of the stopper abuts against the reverse stopper surface, and the end of the stopper away from the insertion entrance is at least partially embedded in the first diameter-reducing section to form a stable clamping structure. The stopper is prevented from slipping out of the accommodation space between the stopper and the insert rod during the process of being subjected to the axial pulling force, thereby significantly improving the success rate of plug-in and the reliability of the connection after plug-in.

Description

Technical Field

[0001] The present invention relates to the field of connection technology, in particular to a butt joint for connecting prefabricated concrete components. The present invention also relates to a prefabricated component assembly provided with the butt joint. Background Art

[0002] For prefabricated components such as precast concrete piles, most products are not used alone. Therefore, during on-site construction, they need to be connected with other prefabricated components of the same or different types to form an integral component that meets the design requirements.

[0003] Taking precast concrete piles as an example, the previous connection method was to design end plates at both ends of the precast concrete piles so that the end plates of the upper and lower sections of the precast concrete piles can be fixed by welding during connection. The specific construction method is to align the end plates of the upper and lower sections of the precast concrete piles, adjust the verticality, and then connect them by electric welding. This connection method is greatly affected by human factors and meteorological factors, and because of the high requirements for the verticality and connection quality of the precast piles, the construction difficulty and construction cost are high. After sinking into the soil, the welding parts are subject to corrosion and there is a risk of gradual failure. In addition, since the main force-bearing bars in the upper and lower precast piles are not connected, the steel cages in the two precast piles are independent of each other, resulting in relatively weak strength of the entire pile after connection.

[0004] In order to solve the defects existing in the connection by end plate welding, a connector which does not require welding and can be directly plugged in has further emerged.

[0005] This connector includes a plug assembly and a slot assembly. The plug assembly includes a plug base fixed in a prefabricated component and a plug extending outward. The slot assembly includes a slot fixed in the prefabricated component and a stopper body fixedly connected to the mouth of the slot. A spring and a split snap ring are provided in the slot. Under the elastic force of the spring, the snap ring is supported at the stopper position at the lower end of the stopper body. The insertion end of the plug is drum-shaped with small ends and a large middle. When the plug passes through the stopper body and is inserted into the slot, the snap ring is first pushed to overcome the elastic force of the spring and move downward while radially stretching the snap ring. After the maximum diameter part of the plug passes over the minimum inner diameter part of the snap ring, the snap ring is reset upward and radially contracted under the elastic force of the spring, forming a shrinkage position at the lower end of the stopper body, thereby preventing the plug from being pulled out of the slot and achieving quick connection.

[0006] Although compared with the traditional welding connection method, the use of the above-mentioned connector can save the connection end plate, thus having the advantages of less metal consumption, fast docking construction speed, and high connection strength. However, since the precast concrete pile inevitably has a certain amount of pile end face inclination and / or nut sleeve positioning error and / or axial misalignment of the upper and lower precast concrete piles, in order to ensure that the multiple connectors between the upper and lower precast concrete piles can complete the plug-in action, it is necessary to leave a sufficiently large radial gap between the inner hole of the stopper and the middle section of the plug to adjust the above-mentioned error, resulting in the central axis of the plug rod being tilted or offset relative to the central axis of the middle nut when the plug contacts the snap ring. When the contact between the snap ring and the stopper surface on the insertion end of the plug that plays an axial locking role is unstable, part of the snap ring will slip from the accommodation space between the stopper and the plug rod during the plug-in or pull-out process and fall into the bottom of the slot. This snap ring slip phenomenon directly leads to a weakening of the connection pull-out strength of the connector, which is not allowed for the construction industry with extremely high safety performance requirements. Summary of the invention

[0007] The object of the present invention is to provide a docking piece, wherein the anti-slip body of the docking piece is not easy to slip off during the plugging or pulling process, thereby significantly improving the success rate of plugging and the connection reliability after plugging.

[0008] Another object of the present invention is to provide a prefabricated component combination connected by the butt joint.

[0009] To achieve the above object, the present invention provides a docking piece, comprising:

[0010] Docking parts, including:

[0011] A connecting sleeve having a docking cavity formed therein;

[0012] A stopper body is arranged at the insertion entrance of the docking cavity, and has a docking passage extending from the outer end to the inner end, and a reverse stopper surface is formed on the inner end, the inner diameter of which gradually increases in a direction away from the outer end;

[0013] The plug rod has a first diameter-reducing section and a second diameter-reducing section at its plug-in end; the outer diameter of the first diameter-reducing section gradually increases along the insertion direction, and the outer diameter of the second diameter-reducing section gradually decreases along the insertion direction; an anti-dropping clamping surface is formed on the outer surface of the first diameter-reducing section, wherein the axial length of the plug rod is greater than the axial length of the stopper;

[0014] An anti-slip body is built into the connecting sleeve to wedge into the accommodation space between the reverse stop surface and the anti-slip clamping surface after the insertion rod is inserted; the anti-slip body has an outer wedge surface corresponding to the reverse stop surface and an inner wedge surface corresponding to the anti-slip clamping surface;

[0015] The included angle β1 between the contour generatrix of the inner wedge surface and the contour generatrix of the outer wedge surface on the anti-detachment body is greater than the included angle β2 between the contour generatrix of the reverse stop surface and the contour generatrix of the anti-detachment clamping surface. When the docking member bears an axial pulling force, the anti-detachment body tilts so that the contour generatrix of the outer wedge surface abuts against the contour generatrix of the reverse stop surface, and at least part of the end of the anti-detachment body far from the insertion entrance is embedded in the first reduced-diameter section.

[0016] Preferably, the anti-detachment body is generally in a ring-segment shape. The contour generatrix of its inner wedge surface forms an included angle α1 with the central axis of the anti-detachment body, the contour generatrix of the anti-detachment clamping surface forms an included angle α2 with the central axis of the plug rod, and the angular value of the included angle α1 is less than or equal to the angular value of the included angle α2;

[0017] Alternatively, the anti-detachment body is generally in a ring-segment shape. The inner wedge surface thereof is provided with tooth portions arranged axially. The contour generatrix connecting the tooth tops of the tooth portions forms an included angle α3 with the central axis of the anti-detachment body, the contour generatrix of the anti-detachment clamping surface forms an included angle α2 with the central axis of the plug rod, and the angular value of the included angle α3 is less than or equal to the angular value of the included angle α2.

[0018] Preferably, the outer wedge surface of the anti-detachment body has a first surface hardness value HRC1, the reverse stop surface of the stop body has a second surface hardness value HRC2, the first surface hardness value HRC1 is greater than the second surface hardness value HRC2 and HRC1sinβ1cosβ2 ≤ HRC2 < HRC1;

[0019] and / or the anti-detachment clamping surface of the plug rod has a third surface hardness value HRC3. The first surface hardness value HRC1 is greater than the third surface hardness value HRC3 and HRC1sin(β1 + β2)cos(β1 - β2) ≤ HRC3 < HRC1, where β1 satisfies: 9° ≤ β1 ≤ 80°, and β2 satisfies: 8° ≤ β2 ≤ 79°.

[0020] Preferably, it further includes: an elastic member, which is arranged in the docking cavity of the connecting sleeve and is used to push the anti-detachment body towards the stop body. Wherein, the connecting sleeve is fixedly connected with the stop body or is an integral structure;

[0021] The outer wedge surface of the anti-detachment body is an outer conical surface. The contour generatrix of this outer conical surface forms an included angle θ1 with the central axis of the anti-detachment body. The reverse stop surface is an inner conical surface. The contour generatrix of this inner conical surface forms an included angle θ2 with the central axis of the docking channel, and the angular value of the included angle θ1 is greater than or equal to the angular value of the included angle θ2.

[0022] Preferably, the difference △R between the inner radius R1 of the docking cavity and the maximum outer radius R2 of the insertion end is greater than the maximum radial width value W of the anti-detachment body and less than the maximum axial height value H of the anti-detachment body. Preferably, the circumferential two end faces of the anti-detachment body are transitioned to the inner wedge surface of the anti-detachment body through inclined surfaces or arc surfaces.

[0023] Preferably, on any cross section of the anti-slip body, the arc center O1 of the outer arc of the anti-slip body is located between its inner arc and the arc center O2 of the inner arc so that the wall thickness of the anti-slip body decreases from the middle to both ends of the circumference, and the shortest straight-line distance L3 from the arc center O1 of the outer arc to the arc center O2 of the inner arc is greater than or equal to the middle wall thickness of the anti-slip body;

[0024] The two circumferential end surfaces of the anti-slip body transition to the inner wedge surface of the anti-slip body through inclined surfaces or arc surfaces.

[0025] Preferably, the elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; the bearing member has an axial section which is inserted into the interior of the spring from the upper end and a radial section which is supported at the upper end of the spring, and the bottom of the anti-slip body is supported on the upper surface of the radial section.

[0026] Preferably, the elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; a plurality of supporting sheets for supporting the anti-slip body and capable of bending downward under the thrust of the plunger are circumferentially provided on the inner wall of the bearing member.

[0027] Preferably, the elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; the bearing surface of the bearing member is inclined downward from the middle to the surrounding areas, and the bottom surface of the anti-slip body is an inclined surface whose inclination direction is consistent with the inclination direction of the bearing surface.

[0028] To achieve the above-mentioned other purpose, the present invention provides a prefabricated component combination, including a first prefabricated component and a second prefabricated component, the first prefabricated component and the second prefabricated component are connected by a connecting piece, the connecting piece is a docking piece as described in any one of the above items, the insertion rod of the docking piece is arranged on the first prefabricated component, and the connecting sleeve, stop body, anti-slip body and elastic component of the docking piece are arranged on the second prefabricated component.

[0029] The docking piece provided by the present invention is formed with a reverse stop surface at the inner end of the docking channel, an anti-slipping clamping surface is formed on the first diameter-reducing section of the plug rod, and an outer wedge surface and an inner wedge surface are formed on the anti-slipping body. After the plug-in connection is completed, the anti-slipping body can be wedged into the accommodating space between the reverse stop surface and the anti-slipping clamping surface, and its outer wedge surface or at least a part of the outer wedge surface contacts and weds with the reverse stop surface, and its inner wedge surface or at least a part of the inner wedge surface contacts and weds with the anti-slipping clamping surface, thereby clamping the plug-in end of the plug rod in the connecting sleeve to realize the function of the plug-in connection; moreover, since the contour generatrix of the wedge surface inside the anti-slipping body and the outer wedge surface The included angle β1 of the wedge surface contour generatrix is ​​greater than the included angle β2 of the reverse stop surface contour generatrix and the anti-slip clamping surface contour generatrix. When the mating piece is subjected to axial pulling force, the outer wedge surface of the anti-slip body abuts against the reverse stop surface, and the end of the anti-slip body away from the plug-in entrance is at least partially embedded in the first reducing section to form a stable locking structure, thereby preventing the anti-slip body mating piece from slipping out of the accommodating space between the stop body and the plug rod during the process of being subjected to axial pulling force, so that all the anti-slip bodies in the connecting sleeve can play a reverse locking role, thereby significantly improving the success rate of plug-in and the reliability of the anti-pull-out connection after plug-in.

[0030] The prefabricated component combination provided by the present invention is provided with the butt joint piece. Since the butt joint piece has the above-mentioned technical effects, the prefabricated component combination provided with the butt joint piece should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a docking piece in a plugged-in state disclosed in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure of the docking piece in which the anti-slip body is located between the docking cavity and the maximum outer radius of the plug-in end during the plug-in process;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure of the connecting sleeve shown in;

[0034] Figure 4 for Figure 1 A schematic diagram of the structure of the stopper body shown in;

[0035] Figure 5 for Figure 1 A schematic diagram of the structure of the plunger shown in FIG.

[0036] Figure 6 for Figure 1 The structural schematic diagram of the anti-slip body shown in;

[0037] Figure 7 A schematic diagram of a structure in which concave and convex teeth are provided on the inner wedge surface of the anti-separation body;

[0038] Figure 8 A schematic diagram of a structure in which the wall thickness of the anti-separation body decreases from the middle to both ends of the circumference;

[0039] Fig. 9 A schematic diagram of the structure of the anti-separation body with both circumferential end surfaces transitioning to the inner wedge surface through the inclined surface;

[0040] Fig.10 A schematic structural diagram of a bearing member disclosed in an embodiment of the present invention;

[0041] Fig.11 A schematic structural diagram of another bearing member disclosed in an embodiment of the present invention;

[0042] Fig.12 for Fig.11 A cross-sectional view of the support sheet of the carrier shown after being bent;

[0043] Fig.13 This is a schematic structural diagram of another bearing component disclosed in an embodiment of the present invention.

[0044] Fig.14 It is a structural schematic diagram of another docking piece in a plugged-in state disclosed in an embodiment of the present invention;

[0045] Fig.15 It is a structural schematic diagram of a docking piece in a pulled-out state disclosed in an embodiment of the present invention;

[0046] Fig.16 for Fig.14 Schematic diagram of the enlarged structure of part A.

[0047] In the figure:

[0048] 1. Connecting sleeve 2. Stop body 3. Insert rod 4. Anti-slip body 5. Reverse stop surface 6. Threaded connection section 7. Screw operation part 8. Insertion guide section 9. First diameter reducing section 10. Second diameter reducing section 11. Equal diameter section 12. Anti-slip clamping surface 13. Anti-slip body limiting surface 14. Axial stop surface 15. Bottom surface 16. Outer wedge surface 17. Inner wedge surface 17a. Inclined surface 18. Outer vertical surface 19. Concave and convex teeth 20. Spring 21. Bearing member 22. Axial section 23. Radial section 24. Bending portion 25. Support sheet 26. Bearing surface 27. Docking channel 28. Docking cavity 29. Accommodating space. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0051] Please refer to Figure 1 , Figure 2 , Figure 1 A schematic diagram of the structure of a docking piece disclosed in an embodiment of the present invention; Figure 2 for Figure 1 The structure schematic diagram of the docking piece is that the anti-slip body is located between the docking cavity and the maximum outer radius of the plug-in end during the plug-in process.

[0052] As shown in the figure, in a specific embodiment, the docking piece provided by the present invention is mainly composed of components such as a connecting sleeve 1, a stopper 2, an insert rod 3, an anti-slip body 4 and an elastic component, wherein the connecting sleeve 1 is used to be embedded in the concrete material of a prefabricated component to be connected, the elastic component and the anti-slip body 4 are installed inside the connecting sleeve 1, and the stopper 2 is arranged at the plug-in entrance of the docking cavity 28. On the one hand, it is used to keep the anti-slip body 4 and the elastic component in the connecting sleeve 1, and on the other hand, it is used to cooperate with the insert rod 3 and the anti-slip body 4 so that the insert rod 3 can remain in the inserted position after being inserted into the connecting sleeve 1 and will not fall out of the connecting sleeve 1, thereby realizing the plug-in connection.

[0053] Please refer to Figure 3 , Figure 4 , Figure 3 for Figure 1 A schematic diagram of the structure of the connecting sleeve shown in; Figure 4 for Figure 1 The structural schematic diagram of the stopper body is shown in .

[0054] As shown in the figure, the connecting sleeve 1 is a cylindrical nut, the outer peripheral surface of the main part of which is a cylindrical outer surface, and the outer peripheral surface of the lower end is provided with at least one flat surface, for example, a polygonal structure in cross section, and a docking cavity 28 is formed inside, the upper half of the docking cavity 28 is processed with an internal thread, and the lower end of the docking cavity 28 is formed with a constriction part, and the constriction part can be clamped with the main force-bearing reinforcement with a pier head at the end, so as to be connected with the main force-bearing reinforcement of the prefabricated component. Of course, for the connection of the main force-bearing reinforcement in the concrete cast-in-place construction operation, the connecting sleeve 1 can also be screwed or clamped on the end of the main force-bearing reinforcement.

[0055] The stopper body 2 is in the shape of a body of revolution and has an external thread on its outer surface so as to be connected to the internal thread of the connecting sleeve 1 through the external thread, thereby being installed at the end of the connecting sleeve 1. The stopper body 2 has a Figure 4 The middle and upper end) passes through to the inner end ( Figure 4 The docking channel 27 has an upper diameter greater than a lower diameter and is in an inverted cone shape, and a reverse stop surface 5 is formed on the inner end thereof. The inner diameter of the reverse stop surface 5 gradually increases from the lower end of the docking channel toward the outer end.

[0056] Please refer to Figure 5 , Figure 5 for Figure 1 Schematic diagram of the structure of the plunger shown in .

[0057] As shown in the figure, the plug rod 3 is in the shape of a rotating body, and in the axial direction from top to bottom, the plug rod 3 has a threaded connection section 6, a screwing operation part 7, a plug-in guide section 8, a first diameter-reducing section 9 and a second diameter-reducing section 10 in sequence, wherein the threaded connection section 6 is used to connect with a connector provided with an internal thread on other prefabricated components, that is, the plug rod 3 is connected to another prefabricated component by threading, and the screwing operation part 7 can be a polygonal structure, for example, a cross-section of a 9-sided or 11-sided polygon, etc., so as to facilitate the use of a tool to screw the plug rod 3 for rotation, connection or disassembly operations, and the plug-in guide section 8 is generally in the shape of an inverted cone with a diameter at the upper end larger than that at the lower end. During the plug-in process By cooperating with the plug-in guide section 8 and the docking channel 27 of the stop body 2, the insertion rod 3 can be guided to be inserted into the connecting sleeve 1 basically along the central axis of the stop body 2, and after the plug-in is completed, the central axes of the two are basically coincident, and a positive stop surface is formed at the upper end of the stop body 2. The step portion at the upper end of the plug-in guide section 8 can be supported on the positive stop surface to control the insertion depth of the insertion rod 3 into the connecting sleeve 1 and prevent the insertion rod 3 from being excessively inserted into the connecting sleeve 1. The positive stop surface is combined with the stop body 4 to lock the axial position of the insertion rod 3 relative to the stop body 2. In order to ensure the effective cooperation between the insertion rod 3 and the stop body 2, the axial length of the insertion rod 3 is greater than the axial length of the stop body 2.

[0058] The first diameter reducing section 9 and the second diameter reducing section 10 together form a diameter reducing plug joint of the plug rod 3. The outer diameter of the first diameter reducing section 9 gradually increases along the insertion direction (i.e. Figure 1 The outer diameter of the second reducing section 10 gradually decreases along the insertion direction. The first reducing section 9 and the second reducing section 10 are integrally formed, and a small equal-diameter section 11 may be provided between the two. The equal-diameter section 11 may increase the axial tensile strength between the anti-slip body 4 and the reducing plug joint. The second reducing section 10 is in the shape of a spherical segment and has a flattened lower end surface.

[0059] Among them, an anti-slip clamping surface 12 is formed on the outer surface of the first variable diameter section 9, and a anti-slip body limiting surface 13 is formed between the anti-slip clamping surface 12 and the plug-in guide section 8. The anti-slip body limiting surface 13 can prevent the anti-slip body 4 from slipping into the plug-in guide section 8 and the docking channel 27. The outer surface of the first variable diameter section 9 is formed with two axial stop surfaces 14 on the anti-slip clamping surface 12. The bottom of the anti-slip body 4 can be stuck on the axial stop surface 14 to prevent the anti-slip body 4 from sliding downward relative to the plug-in rod 3 when the plug-in rod 3 is subjected to tension, thereby increasing the connection gap of the prefabricated component and reducing the connection reliability.

[0060] Please refer to Figure 6 , Figure 6 for Figure 1 The structural schematic diagram of the anti-slip body is shown in FIG.

[0061] As shown in the figure, the anti-slip body 4 is built into the connecting sleeve 1 so as to be wedged into the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12 after the insertion rod 3 is inserted. The anti-slip body 4 has a bottom surface 15, an outer wedge surface 16 corresponding to the reverse stop surface 5 and an inner wedge surface 17 corresponding to the anti-slip clamping surface 12. The contour generatrix of the inner wedge surface 17 of the anti-slip body 4 forms an angle α1 with the central axis of the anti-slip body 4, and the contour generatrix of the outer wedge surface 16 of the anti-slip body 4 forms an angle θ1 with the central axis of the anti-slip body 4, and the angle value of θ1 is greater than the angle value of α1. Between the outer wedge surface 16 and the bottom surface 15 is a longitudinal arc-shaped outer vertical surface 18.

[0062] From the perspective of specific structure, the anti-slip body 4 can be either a split structure or an integrated structure before use. These two structures are described below respectively.

[0063] If it is a split structure, the anti-slip body 4 is roughly in the shape of a ring petal, and multiple anti-slip bodies 4 (for example 2-6) are distributed in a ring manner with the central axis of the connecting sleeve 1 as the center. In the front stroke when the insert rod 3 is inserted into the connecting sleeve 1 and contacts the anti-slip body 4 through the second reducing section 10, the anti-slip body 4 can at least move obliquely downward along the reverse stop surface 5 and disperse radially. In the rear stroke when the insert rod 3 is inserted into the connecting sleeve 1 and contacts the anti-slip body 4 through the first reducing section 9, the anti-slip body 4 can at least move obliquely upward along the reverse stop surface 5 and contract radially to wedge into the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12. After the insertion is completed, the outer wedge surface 16 of each anti-slip body 4 or at least a part of the outer wedge surface 16 contacts the reverse stop surface 5 of the stop body 2, and the inner wedge surface 17 of each anti-slip body 4 or at least a part of the inner wedge surface 17 contacts the anti-slip clamping surface 12 of the insert rod 3.

[0064] If it is an integrated structure, it is annular in structure as a whole, with multiple ring petals, each ring petal body is distributed in a ring manner with the central axis of the connecting sleeve 1 as the center, and is connected as a whole with a very small wall thickness on the outside and / or the bottom. In the front stroke when the plug rod 3 is inserted into the connecting sleeve 1 and contacts with it through the second diameter reducing section 10, it can be split into multiple ring petals, each ring petal body is a stop body 4, each stop body 4 can at least move obliquely downward along the reverse stop surface 5 and disperse radially, and when the plug rod 3 is inserted into the connecting sleeve 1, the plug rod 3 can be inserted into the connecting sleeve 1. In the rear stroke in which the socket 1 contacts the anti-slip body 4 through the first reducing section 9, the anti-slip body 4 can at least move obliquely upward along the reverse stop surface 5 and radially contract to wedge into the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12. After the insertion is completed, the outer wedge surface 16 of each anti-slip body 4 or at least a part of the outer wedge surface 16 contacts the reverse stop surface 5 of the stop body 2, and the inner wedge surface 17 of each anti-slip body 4 or at least a part of the inner wedge surface 17 contacts the anti-slip clamping surface 12 of the insertion rod 3.

[0065] Compared with the split structure, the anti-slip body 4 of the integrated structure can stand stably on the supporting member 21 with a stable center of gravity. When the insertion rod 3 applies an axial thrust and / or a radial thrust away from the central axis to the anti-slip body 4, the second reducing section 10 of the insertion rod 3 can be prevented from flipping over or pushing down the anti-slip body 4, so as to ensure the success rate of plug-in and the pull-out strength.

[0066] like Fig.14 and Fig.16 As shown, in order to prevent the anti-slip body butt joint from slipping out of the accommodating space 29 between the stop body 2 and the plunger 3 during the axial pulling force, the included angle between the contour generatrix of the inner wedge surface 17 of the anti-slip body and the contour generatrix of the outer wedge surface 16 is greater than the included angle β1 of the contour generatrix of the reverse stop surface 5 and the contour generatrix of the anti-slip clamping surface 12, wherein β1 satisfies: 9°≤β1≤80°, and β2 satisfies: 8°≤β2≤79°; as shown in FIG. Fig.15 As shown, when the mating parts are subjected to axial pulling force, the outer wedge surface 16 of the anti-slip body 4 abuts against the reverse stop surface 5, and the end of the anti-slip body 4 away from the insertion entrance is at least partially embedded in the first reducing section 9. At this time, the stop body 2, the insertion rod 3, and the anti-slip body 4 are all in a relative position locked and fixed state.

[0067] Furthermore, the contour generatrix of the inner wedge surface 17 of the anti-slip body 4 forms an angle α1 with the central axis of the anti-slip body, the contour generatrix of the anti-slip clamping surface 12 forms an angle α2 with the central axis of the plunger 3, and the angle value of the angle α1 is less than or equal to the angle value of the angle α2.

[0068] If the angle α1 is smaller than the angle α2, the bite force between the lower part of the anti-slip body 4 and the first reducing section 9 is larger, while the bite force between the upper part of the anti-slip body 4 and the first reducing section 9 is relatively smaller. The extrusion force surface between the lower part of the anti-slip body 4 and the first reducing section 9 is smaller. In order to ensure the anti-pullout performance, the material properties (such as hardness) of the anti-slip body 4 and the insert rod 3 are required to be high.

[0069] If the angle α1 is equal to the angle α2, the axial biting force between the anti-slip body 4 and the first reducing section 9 is relatively uniform, the extrusion force-bearing surfaces of the lower part of the anti-slip body 4 and the first reducing section 9 are relatively large, the extrusion and embedding deformation is relatively small, the mutual biting effect is good, and it can withstand a relatively large axial pull-out resistance.

[0070] Similarly, the outer wedge surface 16 of the anti-slip body 4 is an outer conical surface, and its contour generatrix forms an angle θ1 with the central axis of the anti-slip body 4. The reverse stop surface 5 is an inner conical surface, and its contour generatrix forms an angle θ2 with the central axis of the docking channel 27, and the angle value of the angle θ1 is greater than or equal to the angle value of the angle θ2, so as to reduce the friction resistance of the anti-slip body 4 gathered along the inner conical surface at the outer periphery of the first diameter-changing section, and ensure the smoothness of the embedding of the anti-slip body 4. In this embodiment, the central axis of the plunger 3, the central axis of the anti-slip body 4, and the central axis of the stop body 2 are parallel or approximately parallel or approximately overlap.

[0071] The upper end of the anti-slip body 4 that contacts the plug-in end of the plug rod 3 in the initial stage, that is, the upper part of the inner side of the anti-slip body 4 can be designed as an inclined surface or an arc surface to reduce the friction and axial thrust of the plug rod 3 on the anti-slip body 4, making the anti-slip body 4 more difficult to slip off. Lubricating materials such as grease can also be applied to the contact part of the anti-slip body 4 and the plug rod 3 during insertion, or a layer of self-lubricating materials such as polytetrafluoroethylene, polyacetal, polyformaldehyde, etc. can be compounded on the plug-in end of the plug rod 3 to reduce the friction coefficient between the two, thereby further reducing the friction and reducing the possibility of the anti-slip body 4 slipping off.

[0072] On the basis of the above embodiments, further improvements can be made. For example, in order to improve the anti-pullout performance of the docking parts and prevent the insertion rod 3 from moving outward in the axial direction due to the oblique downward sliding of the anti-slip body 4 relative to the insertion rod 3 under the force of outward pulling, the outer wedge surface 16 of the anti-slip body 4 in contact with the reverse stop surface 5 has at least one embedded portion embedded in the reverse stop surface 5 in the circumferential direction, and the reverse stop surface 5 is formed with a concave embedding area for accommodating the embedded portion, so that the anti-slip body 4 and the stop body 2 form an interlocking connection structure, and / or the inner wedge surface 17 of the anti-slip body 4 in contact with the anti-slip clamping surface 12 has at least one embedded portion embedded in the anti-slip clamping surface 12 in the circumferential direction, and the anti-slip clamping surface 12 is formed with a concave embedding area for accommodating the embedded portion, so that the anti-slip body 4 and the insertion rod 3 form an interlocking connection structure.

[0073] To achieve such an embedding effect, in at least one embodiment, the outer wedge surface 16 of the anti - detachment body 4 has a first surface hardness value HRC1, the reverse anti - stop surface 5 of the anti - stop body 2 has a second surface hardness value HRC2, the first surface hardness value HRC1 is greater than the second surface hardness value HRC2 and HRC1sinβ1cosβ2≤HRC2<HRC1, the anti - detachment clamping surface 12 of the plug 3 has a third surface hardness value HRC3, the first surface hardness value HRC1 is greater than the third surface hardness value and HRC1sin(β1 + β2)cos(β1 - β2)≤HRC3<HRC1, where the first surface hardness value HRC1 is preferably 50HRC - 54HRC, and the third surface hardness value HRC3 is preferably 36HRC - 45HRC.

[0074] As Fig.15 shown, when the docking part is subjected to an anti - pull - out test or an external pull - out force during actual use, the anti - detachment body 4, the anti - stop body 2, and the plug 3 can form an interlocking and clamping connection structure through embedding, thereby further improving the anti - pull - out performance.

[0075] In some other embodiments, in terms of dimensions, the anti - detachment body 4 has a maximum radial width value W and a maximum axial height value H. To prevent the anti - detachment body 4 from tipping (tipping means that the straight line connecting the two farthest points on the longitudinal section of the anti - detachment body 4 is perpendicular or approximately perpendicular to the central axis of the connecting sleeve 1) or falling off (falling off means that the anti - detachment body 4脱离 the supporting surface of the bearing part 21) when the plug 3 is inserted, here the maximum radial width value W of the anti - detachment body 4 is less than the maximum axial height value H of the anti - detachment body 4, and the difference △R between the inner radius R1 of the docking cavity 28 and the maximum outer radius R2 of the plugging end is designed to be greater than the maximum radial width value W of the anti - detachment body 4 and less than the maximum axial height value H of the anti - detachment body 4.

[0076] During the process of inserting the plunger 3, before the anti-slip body 4 begins to enter the accommodating space 29 between the reverse stop surface 5 and the anti-slip engaging surface 12, its stroke can be roughly divided into a first stroke, a second stroke and a third stroke. After adopting the above structure, in the first stroke, when the anti-slip body 4 touches the end of the plunger 3, the contact portion of the two is closer to the maximum outer diameter portion of the plugging end of the plunger 3, and the angle between the tangent of the contact portion and the central axis is smaller, so that the angle between the resultant force of the plunger 3 acting on the anti-slip body 4 and the central axis is larger, and it tends to be decomposed more into radial force and less into axial force, thereby achieving the effect of preventing the anti-slip body 4 from tipping over or even falling off; in the second stroke On the one hand, the anti-slip body 4 in this stroke has moved radially outward for a certain distance, and its contact portion with the insertion end of the plug rod 3 is closer to the maximum outer diameter portion of the plug-in end of the plug rod 3. On the other hand, the outer peripheral portion of the anti-slip body 4 can timely contact the inner wall of the docking cavity 28, so that the anti-slip body 4 is effectively supported by the inner wall of the docking cavity 28. Under the support of the inner wall of the docking cavity 28, a reverse torque can be formed to resist further turning over of the anti-slip body 4. These two aspects can effectively prevent the anti-slip body 4 from tipping over or even falling off. In the third stroke, sufficient tipping space cannot be formed between the maximum outer diameter portion of the plug-in end of the plug rod 3 and the inner wall of the docking cavity 28 (see Figure 2 ), when the dumping space is limited, the anti-slip body 4 will not dump or even fall. Moreover, in the above strokes, even if the anti-slip body 4 deflects to a certain extent, this structure can prevent its deflected posture from further deteriorating. After the anti-slip body 4 begins to enter the accommodation space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12, the anti-slip body 4 can gradually restore its normal posture under the restriction and guidance of the accommodation space 29. This makes it difficult for the anti-slip body 4 to dump during the plug-in process, thereby significantly improving the plug-in success rate and the connection reliability after plug-in.

[0077] Please refer to Figure 7 , Figure 7 A schematic diagram of a structure in which concave and convex teeth are arranged on the inner wedge surface of the anti-separation body.

[0078] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0079] As shown in the figure, in order to further improve the pull-out resistance of the docking piece, axially arranged concave and convex teeth 19 can be processed on the inner wedge surface 17 of the anti-slip body 4. By designing the tooth portion, the bite force of the anti-slip body 4 on the anti-slip clamping surface 12 can be improved, especially it can be clamped on the axial stop surface 14 processed on the anti-slip clamping surface 12, thereby preventing the anti-slip body 4 from sliding downward relative to the anti-slip clamping surface 12 of the plug 3, ensuring that the prefabricated components connected by the docking piece are reliably connected, and the gap after connection is not easy to become larger, which can be more pull-out-resistant.

[0080] Since concave and convex teeth 19 are processed on the inner wedge surface 17 of the anti-slip body 4, in the direction from the first reducing section 9 to the second reducing section 10, the tooth tips of each concave and convex tooth 19 are successively away from the central axis of the anti-slip body 4; the contour generatrix connecting each tooth tip is a straight line, the contour generatrix connecting the tooth tops of each tooth portion forms an angle α3 with the central axis of the anti-slip body 4, the contour generatrix of the anti-slip clamping surface 12 forms an angle α2 with the central axis of the plug 3, and the angle value of the angle α3 is less than or equal to the angle value of the angle α2.

[0081] If the angle α3 is smaller than the angle α2, the bite force between the concave-convex teeth 19 at the bottom of the anti-slip body 4 and the first reducing section 9 is larger, while the bite force between the concave-convex teeth 19 at the top of the anti-slip body 4 and the first reducing section 9 is relatively smaller, that is, only part of the concave-convex teeth 19 play a bite force role. In order to ensure the anti-pullout performance, high requirements are placed on the material properties (such as hardness) of the anti-slip body 4 and the plug 3.

[0082] If the angle α3 is equal to the angle α2, the bite force between each concave-convex tooth 19 and the first diameter-changing section 9 is relatively uniform, and the bite force of each concave-convex tooth 19 can be exerted, the bite effect between them is good, and a large axial pull-out resistance can be withstood.

[0083] The docking piece provided in this embodiment improves the bite force between the inner wall of the anti-slip body 4 and the first diameter-changing section 9 by providing concave-convex teeth 19 on the inner wall of the anti-slip body 4, thereby improving the axial pull-out resistance of the docking piece.

[0084] Please refer to Figure 8 , Fig. 9 , Figure 8 A schematic diagram of a structure in which the wall thickness of the anti-separation body decreases from the middle to both ends of the circumference; Fig. 9 It is a schematic structural diagram of the two circumferential end surfaces of the anti-separation body transitioning to the inner wedge surface through the inclined surface.

[0085] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0086] As shown in the figure, in the docking piece provided by the present embodiment, on any cross section of the anti-slip body 4, the center O1 of the outer arc of the anti-slip body 4 is located between the inner arc F and the center O2 of the inner arc, so that the wall thickness of the anti-slip body 4 decreases from the middle to the two circumferential ends, and the shortest straight-line distance L3 from the center O1 of the outer arc to the center O2 of the inner arc is greater than or equal to the middle wall thickness of the anti-slip body 4; when the inner arc F and the outer arc of the anti-slip body 4 are designed to be non-concentric, the radius F of the inner arc can be appropriately increased.

[0087] In this embodiment, in order to ensure that the anti-slip body 4 effectively and reliably stops the first diameter-reducing section 9 in reverse, the radius of the minimum inner arc F of the anti-slip body 4 is greater than or equal to the minimum outer diameter of the first diameter-reducing section 9 .

[0088] Compared with the first embodiment, the docking piece provided in this embodiment can reasonably enlarge the inner arc radius of the anti-slip body 4 while controlling the wall thickness of the anti-slip body 4, which can not only avoid the interference of the circumferential ends of the anti-slip body 4 with the smooth penetration of the plug 3 due to the excessively small inner arc radius, and prevent the anti-slip body 4 from tipping over, but also enable the inner wall and the lower end face of the anti-slip body 4 to abut against any axial position of the first reducing section 9 with a maximized contact area, thereby avoiding the anti-slip body 4 and the first reducing section 9 from being pulled apart due to the contact area when subjected to axial pulling force, thereby improving the pull-out resistance of the connecting component.

[0089] Of course, in order to achieve the above-mentioned effect and avoid interference between the circumferential ends of the inner wall of the anti-slip body 4, one or both circumferential end faces of the anti-slip body 4 and the inner wall surface can be chamfered or rounded, that is, the circumferential end faces of the anti-slip body 4 are transitioned to the inner wedge surface 17 of the anti-slip body 4 through an inclined surface 17a (or an arc surface).

[0090] In the process of studying how to prevent the anti-slip body 4 from tipping over, the inventors found that the elastic component used to push the anti-slip body 4 toward the stop body 2 also has a crucial influence. Therefore, improving the stability of the anti-slip body 4 by improving the elastic component has become a previously unexplored but feasible direction.

[0091] Please refer to Fig.10 , Fig.10 The present invention is a schematic structural diagram of a bearing component disclosed in an embodiment of the present invention.

[0092] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0093] As shown in the figure, the elastic component is mainly composed of two parts: a spring 20 and a supporting member 21. The spring 20 is used to generate an upward elastic force so that the anti-slip body 4 always has a tendency to return to the reverse stop surface 5 or is pressed against the reverse stop surface 5. By setting the supporting member 21, the anti-slip body 4 can be placed on the supporting member 21 more quickly and stably, and the elastic force of the spring 20 can be evenly transmitted to the anti-slip body 4.

[0094] A typical bearing member 21 accommodates the upper end of the spring 20 in the inner cavity of the bearing member 21, and the axial section of the bearing member 21 is located on the outside of the spring 20. Since the axial section needs to have a certain wall thickness, the radial dimension of the spring 20 is relatively small. Moreover, there is a large gap between the spring 20 and the inner wall of the connecting sleeve 1. As a result, when the spring 20 is subjected to the thrust of the insert rod 3, especially when the insert rod 3 is inserted in a skewed or deviated from the center line, the spring 20 is easily subjected to uneven force and bends and deforms, which in turn causes the bearing member 21 and the anti-slip body 4 on the bearing member 21 to slide off due to the skew.

[0095] In this regard, the present invention redesigns the bearing member 21. The improved bearing member 21 has an axial section 22 that is inserted into the interior of the spring 20 from the upper end and a radial section 23 that is supported on the upper end of the spring 20. The axial section 22 and the radial section 23 are both hollow structures, and the inner holes on both sides pass through from top to bottom. The bottom of the anti-slip body 4 is supported on the upper surface of the radial section 23, and the outer side surface of the radial section 23 is arc-shaped to reduce the contact area with the inner wall of the connecting sleeve 1 and avoid excessive friction resistance during the up and down movement.

[0096] This type of carrier 21 can not only increase the radial width of the carrier 21 and improve the stability of the anti-slip body 4 on the carrier 21, but also, because the axial section 22 of the carrier 21 extends into the inner cavity of the spring 20 from the inside, and the spring 20 is located on the outside of the axial section 22 of the carrier, the diameter of the spring 20 can be designed to be relatively large, and the gap between the spring 20 and the inner wall of the connecting sleeve 1 is correspondingly smaller. In this way, even if the plunger 3 is inserted in a skewed or deviated from the center line, the spring 20 is not easy to tilt or bend and deform, and can provide a more reliable bottom support for the anti-slip body 4, so that the anti-slip body 4 is not easy to slide off and has better stability.

[0097] Please refer to Fig.11 , Fig.12 , Fig.11 A schematic structural diagram of another bearing member disclosed in an embodiment of the present invention; Fig.12 for Fig.11 A cross-sectional view of the support plate of the carrier shown after being bent.

[0098] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0099] As shown in the figure, in another embodiment, the supporting member 21 is generally in the shape of a flat ring, and its outer edge is bent downward to form a bending portion 24. The inner side of the bending portion 24 is a space for accommodating the upper end of the spring 20. A plurality of support sheets 25 are circumferentially provided on the inner wall of the supporting member 21. These support sheets 25 are used to support the anti-slip body 4 upward. Moreover, during the process of inserting the insert rod 3, these support sheets 25 can be bent downward under the thrust of the insert rod 3, and will not affect the normal insertion of the insert rod 3.

[0100] Since a support sheet 25 is provided on the inner wall of the carrier 21, in the initial stage of the insertion of the rod 3, the support sheet 25 can effectively support the anti-slip body 4 upward at a position biased to the inside, thereby preventing the anti-slip body 4 from sliding down under the drive of the rod 3. After the initial stage, the anti-slip body 4 has moved radially outward for a certain distance. At this time, even if the anti-slip body 4 is not supported by the support sheet 25, the risk of sliding down has been greatly reduced.

[0101] The support piece 25 shown in the figure is triangular, with its top angle pointing outward in the radial direction, and connected to the carrier body through the top angle, and can be made by plate stamping. The advantage of this structure is that the part close to the center of each support piece 25 has a larger width, which can effectively support the anti-slip body 4. At the same time, the root of each support piece 25 has a smaller width, which is easy to deform and bend when under pressure, and will not prevent the insertion rod 3 from being smoothly inserted into the connecting sleeve 1.

[0102] It can be understood that the shape of the support sheet 25 is not limited to a triangle, but can also be various shapes such as a rectangle, trapezoid, circle, semicircle, etc., and the number thereof can be determined according to the number and size of the anti-slip bodies 4. In order to ensure that each anti-slip body 4 can be supported by at least one support sheet 25, the circumferential width of the gap formed between two adjacent support sheets 25 can be smaller than the circumferential width of the anti-slip body 4. Moreover, in addition to being integrally formed on the carrier 21, the support sheet 25 can also be a split-connected structure with the carrier 21, and the two are separately processed and manufactured, and then connected together through assembly.

[0103] In order to facilitate the support sheet 25 to bend downward, an indentation or a groove of a certain depth can be provided along the expected bending line at the root of each support sheet 25. In this way, the connection strength between the support sheet 25 and the support plate body can be weakened while ensuring the support effect, so that the support sheet 25 can be easily bent downward along the indentation or groove when under pressure, thereby making way for the insertion channel of the insertion rod 3.

[0104] Please refer to Fig.13 , Fig.13 This is a schematic structural diagram of another bearing component disclosed in an embodiment of the present invention.

[0105] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0106] As shown in the figure, in another embodiment, the supporting member 21 is generally in the form of a flat ring, and its outer edge is bent downward to form a bending portion 24. The inner side of the bending portion 24 is a space for accommodating the upper end of the spring 20. The supporting surface 26 at the top of the supporting member 21 is inclined downward from the middle to the surrounding areas. At the same time, the bottom surface 15 of the anti-slip body 4 is also inclined downward from the middle to the surrounding areas, and its inclination direction is consistent with the inclination direction of the supporting surface 26 of the supporting member.

[0107] Since the contact surface between the anti-slip body 4 and the supporting member 21 is an inclined surface, the anti-slip body 4 always has a tendency to move outward and downward relative to the supporting member 21. When the anti-slip body 4 is subjected to the thrust of the push rod, the anti-slip body 4 is more likely to move outward and downward. Moreover, the tendency of the anti-slip body 4 to move outward and downward can offset its tendency to tip inward to a certain extent, thereby preventing the anti-slip body 4 from tipping inward.

[0108] If the downward inclination angle of the bearing surface 26 of the bearing member is too large, the area of ​​the inner wedge surface 17 of the anti-slip body 4 will become too small. If the downward inclination angle of the bearing surface 26 of the bearing member is too small, the tendency of the anti-slip body 4 to move outward and downward is not obvious. Therefore, the downward inclination angle of the bearing surface 26 of the bearing member, that is, the angle between the bearing surface 26 and the horizontal plane can be designed to be 1°ˉ60°. In this embodiment, combined with the shape and size requirements of the connecting sleeve 1, the angle between the bearing surface 26 and the horizontal plane can be designed to be 5°ˉ15°.

[0109] When in use, the spring 20, the bearing member 21, the anti-slip body 4 and the stop body 2 of the docking member are sequentially installed in the connecting sleeve 1. The connecting sleeve 1 can be pre-buried in the concrete prefabricated part (such as a concrete prefabricated pile) and connected to the force-bearing ribs in the concrete prefabricated part. Under the elastic force of the spring 20, the anti-slip body 4 is supported on the reverse stop surface 5 at the lower end of the stop body 2. The plug rod 3 is connected to another concrete prefabricated part (another concrete prefabricated pile) through the connecting end provided with a thread. When connecting, the plug end of the plug rod 3 is inserted into the connecting sleeve 1, so that the second diameter reducing section 10 of the plug end contacts and passes through the anti-slip body 4. , pushing the anti-slip body 4 to overcome the elastic force of the spring 20 and move downward, and at the same time radially expand the anti-slip body 4. As the insertion rod 3 continues to be inserted downward, after the maximum diameter part of the plug-in end passes over the anti-slip body 4, the anti-slip body 4 is reset upward and radially contracted under the elastic force of the spring 20, forming a shrinkage part at the lower end of the stopper body 2, so that the first diameter reducing section 9 of the plug-in end and the anti-slip body 4 form abutment fit. During the entire plug-in process, the anti-slip body 4 slides along the outer surface of the plug-in end of the plug-in rod 3 to a position embedded in the annular accommodating space 29, thereby preventing the plug-in rod 3 from being pulled out of the connecting sleeve 1 and realizing quick connection.

[0110] Please refer to Fig.14 , Fig.14 It is a structural schematic diagram of another docking piece in a plugged-in state disclosed in an embodiment of the present invention.

[0111] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0112] As shown in the figure, another embodiment is different from the first embodiment in that the stopper 2 and the connecting sleeve 1 are an integrated structure, which can be manufactured by die stamping, stretching, etc. The advantage of this structure is that the overall strength of the stopper 2 and the connecting sleeve 1 is improved, thereby significantly improving the connection reliability after plugging.

[0113] Further, since the stopper 2 and the connecting sleeve 1 are an integrated structure, in order to facilitate the sequential installation of the engagement body 4, the bearing member 21 and the spring 20, the minimum inner diameter of the lower end of the docking cavity 28 on the connecting sleeve 1 is greater than the maximum outer diameter of the engagement body 4, the bearing member 21 and the spring 20, and, in order to prevent the engagement body 4 from being lifted out of the stopper 2, the minimum inner diameter of the stopper 2 is smaller than the maximum outer diameter of the engagement body 4. Further, since the stopper 2 and the connecting sleeve 1 are an integrated structure, in order to facilitate the sequential installation of the engagement body 4, the bearing member 21 and the spring 20, the minimum inner diameter of the lower end of the docking cavity 28 on the connecting sleeve 1 is greater than the maximum outer diameter of the engagement body 4, the bearing member 21 and the spring 20, and, in order to prevent the engagement body 4 from being lifted out of the stopper 2, the minimum inner diameter of the stopper 2 is smaller than the maximum outer diameter of the engagement body 4. Among them, when installing, first put the engagement body 4 into the docking cavity 28 through the lower end of the docking cavity 28 on the connecting sleeve 1, then put in the supporting member 21, the supporting member 21 is used to support the engagement body 4, and finally put in the spring 20, and the connecting sleeve 1 is then threadedly connected with the main force-bearing ribs (such as steel rods, threaded steel, etc.) of the prefabricated component, and the spring 20 is used to generate a thrust to the stop body 2, so that the anti-slip body 4 always has a tendency to return to the reverse stop surface 5 or is pressed against the reverse stop surface 5, and the supporting member 21 can evenly transfer the elastic force of the spring 20 to the engagement body 4, and the engagement body 4 can be a split structure or an integrated structure. The engagement body 4 preferably adopts an integrated structure. The anti-slip body 4 with an integrated structure can stand stably on the supporting member 21 with a stable center of gravity. After the fitting body 4, the supporting member 21 and the spring 20 are installed in sequence, the docking cavity 28 on the connecting sleeve 1 can be connected to the main force-bearing ribs, preferably by screwing or snapping the ends of the main force-bearing ribs, wherein the ends of the main force-bearing ribs are used to support one end of the spring 20 away from the supporting member 21.

[0114] Furthermore, the engagement body 4, the bearing member 21 and the spring 20 are installed before the connection sleeve 1 is connected to the main force-bearing reinforcement. Therefore, after the prefabricated parts are prefabricated, the connection sleeve 1 is in a state that can be used directly. During on-site construction, it is only necessary to complete the connection of the plug rod 3 to carry out the connection operation of adjacent prefabricated components, thereby improving the connection efficiency of the prefabricated components, improving the construction efficiency, and thus reducing the construction cost.

[0115] The above embodiments are only preferred solutions of the present invention, and are not limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation methods. For example, a circumferential groove is processed on the anti-slipping engaging surface 12 of the first diameter-reducing section 9 of the plunger 3 to prevent the anti-slipping body 4 from sliding downward relative to the plunger 3, or the second diameter-reducing section 10 of the plunger 3 is designed to be hemispherical, or the spring 20 and the bearing member 21 are an integrated structure, etc. Since there are many possible implementation methods, they will not be described one by one here.

[0116] In addition, the technical solutions of various embodiments can be combined with each other, but it should be based on the fact that ordinary technicians in this field can implement it. For example, in order to improve the anti-dumping ability, while the support sheet 25 is provided on the inner wall of the carrier 21, the bearing surface 26 of the carrier 21 can be designed to be an inclined surface that slopes downward from the middle to the surroundings, that is, Fig.10 , Fig.11 The embodiment shown is Fig.12 The embodiments shown are combined with each other. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope of the present invention.

[0117] In addition to the above-mentioned butt joint, the present invention further provides a prefabricated component combination, comprising a first prefabricated component and a second prefabricated component connected to each other, and the first prefabricated component and the second prefabricated component are connected by the above-mentioned butt joint.

[0118] Specifically, the insert rod 3 of the docking piece is arranged on the first prefabricated component, and the insert rod 3 can be detachably connected to the first prefabricated component through an external thread. The spring 20, the supporting member 21, the anti-slip body 4 and the stop body 2 of the docking piece are arranged on the connecting sleeve 1 (for example, a sleeve nut) of the second prefabricated component. The first prefabricated component and the second prefabricated component are firmly connected together through the snap-fit ​​between the first reducing section 9 of the insert rod 3 of the connecting piece and the anti-slip body 4 in the connecting sleeve 1.

[0119] In an environment where acids and alkalis are corrosive to metals, in order to prevent the stress-bearing bars and the joint parts of the two prefabricated components from rusting due to exposure, epoxy resin can be coated on the connected end faces of the prefabricated components. At the same time, epoxy resin is filled in the connecting sleeve 1. Moreover, by filling with epoxy resin, the pull-out resistance of the joint parts can be further improved.

[0120] The above-mentioned precast component combination can be a combination of precast concrete piles or precast concrete caps or precast concrete slabs or precast concrete walls or precast concrete columns or precast concrete beams or precast concrete balconies or precast concrete bay windows or precast concrete stairs or precast concrete elevator shafts or precast concrete roofs or precast concrete terraces.

[0121] The above is a detailed introduction to the docking parts and prefabricated component combination provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A docking piece, characterized in that: Comprising: A connecting sleeve, within which a docking cavity is formed; A stop body, disposed at the insertion entrance of the docking cavity, having a docking channel that penetrates from the outer end to the inner end, and an inverse stop surface with an inner diameter gradually increasing in a direction away from the outer end formed at the inner end; An insertion rod, whose insertion end has a first diameter-changing section and a second diameter-changing section; the outer diameter of the first diameter-changing section gradually increases along the insertion direction, and the outer diameter of the second diameter-changing section gradually decreases along the insertion direction; an anti-disengagement clamping surface is formed on the outer surface of the first diameter-changing section, wherein the axial length of the insertion rod is greater than the axial length of the stop body; An anti-disengagement body, built into the connecting sleeve to wedge into the accommodation space between the inverse stop surface and the anti-disengagement clamping surface after the insertion rod is inserted; the anti-disengagement body has an outer wedge surface corresponding to the inverse stop surface and an inner wedge surface corresponding to the anti-disengagement clamping surface; The included angle β1 between the contour generatrix of the inner wedge surface and the contour generatrix of the outer wedge surface of the anti-disengagement body is greater than the included angle β2 between the contour generatrix of the inverse stop surface and the contour generatrix of the anti-disengagement clamping surface. When the docking member bears an axial pulling force, the anti-disengagement body tilts so that the contour generatrix of the outer wedge surface abuts against the contour generatrix of the inverse stop surface, and at least a part of the end of the anti-disengagement body away from the insertion entrance is embedded in the first diameter-changing section.

2. The docking piece according to claim 1, characterized in that: The anti-disengagement body is generally in a ring petal shape, the included angle α1 is formed between the contour generatrix of its inner wedge surface and the central axis of the anti-disengagement body, the included angle α2 is formed between the contour generatrix of the anti-disengagement clamping surface and the central axis of the insertion rod, and the angular value of the included angle α1 is less than or equal to the angular value of the included angle α2; Alternatively, the anti-disengagement body is generally in a ring petal shape, tooth portions arranged axially are provided on its inner wedge surface, the included angle α3 is formed between the contour generatrix connecting the tooth tops of each tooth portion and the central axis of the anti-disengagement body, the included angle α2 is formed between the contour generatrix of the anti-disengagement clamping surface and the central axis of the insertion rod, and the angular value of the included angle α3 is less than or equal to the angular value of the included angle α2.

3. The docking piece according to claim 1 or 2, characterized in that: The outer wedge surface of the anti-disengagement body has a first surface hardness value HRC1, the inverse stop surface of the stop body has a second surface hardness value HRC2, the first surface hardness value HRC1 is greater than the second surface hardness value HRC2 and HRC1sinβ1cosβ2≤HRC2<HRC1; And / or, the anti-disengagement clamping surface of the insertion rod has a third surface hardness value HRC3, the first surface hardness value HRC1 is greater than the third surface hardness value HRC3 and HRC1sin(β1 + β2)cos(β1 - β2)≤HRC3<HRC1, wherein, β1 satisfies: 9°≤β1≤80°, β2 satisfies: 8°≤β2≤79°.

4. The docking piece according to claim 1, characterized in that: Further comprising: An elastic member, disposed in the docking cavity of the connecting sleeve, for pushing the anti-disengagement body towards the stop body, wherein the connecting sleeve and the stop body are fixedly connected or are of an integral structure; The outer wedge surface of the anti-disengagement body is an outer conical surface, the included angle θ1 is formed between the contour generatrix of this outer conical surface and the central axis of the anti-disengagement body, the inverse stop surface is an inner conical surface, the included angle θ2 is formed between the contour generatrix of this inner conical surface and the central axis of the docking channel, and the angular value of the included angle θ1 is greater than or equal to the angular value of the included angle θ2.

5. The docking piece according to claim 1, characterized in that: The difference △R between the inner radius R1 of the docking cavity and the maximum outer radius R2 of the plug-in end is greater than the radial maximum width value W of the anti-slip body and smaller than the axial maximum height value H of the anti-slip body. The two circumferential end surfaces of the anti-slip body transition to the inner wedge surface of the anti-slip body through inclined surfaces or curved surfaces.

6. The docking piece according to claim 1, characterized in that: On any cross section of the anti-slip body, the arc center O1 of the outer arc of the anti-slip body is located between the inner arc and the arc center O2 of the inner arc so that the wall thickness of the anti-slip body decreases from the middle to both ends of the circumference, and the shortest straight-line distance L3 from the arc center O1 of the outer arc to the arc center O2 of the inner arc is greater than or equal to the middle wall thickness of the anti-slip body; The two circumferential end surfaces of the anti-slip body transition to the inner wedge surface of the anti-slip body through inclined surfaces or arc surfaces.

7. The docking piece according to claim 4, characterized in that: The elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; the bearing member has an axial section inserted into the interior of the spring from the upper end and a radial section supported at the upper end of the spring, and the bottom of the anti-slip body is supported on the upper surface of the radial section.

8. The docking piece according to claim 4, characterized in that: The elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; a plurality of supporting sheets for supporting the anti-slip body and capable of bending downward under the thrust of the plunger are circumferentially provided on the inner wall of the bearing member.

9. The docking piece according to claim 4, characterized in that: The elastic component is a spring, and a bearing member for supporting the anti-slip body is provided at its upper end; the bearing surface of the bearing member is inclined downward from the middle to the surrounding areas, and the bottom surface of the anti-slip body is an inclined surface with an inclined direction consistent with the inclined direction of the bearing surface.

10. A prefabricated component assembly, comprising a first prefabricated component and a second prefabricated component, wherein the first prefabricated component and the second prefabricated component are connected via a connecting member, characterized in that: The connecting piece is a docking piece according to any one of claims 1 to 9, the insert rod of the docking piece is arranged on the first prefabricated component, and the connecting sleeve, stopper, anti-slip body and elastic component of the docking piece are arranged on the second prefabricated component.

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