CN112854209A

CN112854209A - Butt joint piece and prefabricated part combination with same

Info

Publication number: CN112854209A
Application number: CN201911189967.8A
Authority: CN
Inventors: 周兆弟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2021-05-28

Abstract

The invention discloses a butt joint piece and a prefabricated part combination with the butt joint piece, wherein the butt joint piece comprises: the plug comprises a connecting sleeve, a stopping body, an inserting rod and a falling-off preventing body, wherein a reverse stopping surface is formed at the inner end of the stopping body; the outer surface of the first reducing section of the insert rod is provided with an anti-falling clamping surface; the anti-slip body is provided with an outer wedge surface and an inner wedge surface; the contained angle beta 1 of interior wedge face profile generating line and outer wedge face profile generating line is greater than the contained angle beta 2 of reverse backstop face profile generating line and anticreep joint face profile generating line on the body of stopping taking off, and when the butt joint spare bore axial drawing power, the outer wedge face and the reverse backstop face of the body of stopping taking off offset, and keeps away from on the body of stopping taking off the one end at least part embedding of grafting entry first reducing section is in order to form stable structure of stopping. The anti-slip body butt joint piece is prevented from slipping from the accommodating space between the stop body and the plug rod in the process of bearing the axial drawing force, so that the success rate of plugging and the connection reliability after plugging can be obviously improved.

Description

Butt joint piece and prefabricated part combination with same

Technical Field

The invention relates to the technical field of connection, in particular to a butt joint piece for connecting concrete prefabricated parts. The invention also relates to a prefabricated part combination provided with the butt joint piece.

Background

Most of the prefabricated components such as the concrete prefabricated pile are not used independently, so that the prefabricated components are connected with other same or different prefabricated components during field construction to form an integral component meeting the design requirement.

Taking a concrete precast pile as an example, a conventional connection method is to design end plates at both ends of the concrete precast pile so as to fix the end plates of the upper and lower precast concrete piles by welding when connecting. The specific construction method is that the end plates of the upper and lower sections of precast piles are aligned, after the verticality is adjusted, the upper and lower sections of precast piles are connected in an electric welding mode, the connection mode is greatly influenced by human factors and meteorological factors, the requirements on the verticality and the connection quality of the precast piles are high, the construction difficulty and the construction cost are high, and after the precast piles are immersed into a soil body, the welded parts are corroded and then gradually lose efficacy. In addition, because main stress bars in the upper precast pile and the lower precast pile are not connected, the reinforcement cages in the two precast piles are mutually independent, and the strength of the connected whole pile is relatively weak.

In order to solve the defects of the connection by adopting an end plate welding mode, a connecting piece which does not need to be welded and can be directly spliced is further provided.

The connecting piece comprises a plug assembly and a slot assembly, wherein the plug assembly comprises a plug base fixed in a prefabricated part and a plug extending out of the prefabricated part, the slot assembly comprises a slot fixed in the prefabricated part and a stop body fixedly connected with the opening part of the slot, a spring and a split type snap ring are arranged in the slot, under the action of the elastic force of the spring, the snap ring is supported at the stopping part at the lower end of the stopping body, the insertion end of the plug is drum-shaped with two small ends and a big middle part, when the plug passes through the stopping body and is inserted into the slot, the snap ring is pushed to overcome the elastic force of the spring to move downwards and simultaneously radially expand the snap ring, after the maximum diameter part of the plug passes through the minimum inner diameter part of the snap ring, the snap ring is reset upwards and radially folded under the elastic force of the spring, a necking part is formed at the lower end of the stop body, so that the plug is prevented from being pulled out of the slot, and quick connection is realized.

Although compared with the traditional welding connection mode, the connecting end plate can be omitted by using the connecting piece, so that the connecting piece has the advantages of less metal consumption, high butt joint construction speed, high connection strength and the like. However, because the precast concrete pile inevitably has a certain 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 a plurality of connecting pieces between the upper and lower precast concrete piles can complete the plugging action, a radial gap with a sufficient size needs to be left between the inner hole of the stop body and the middle section of the plug to adjust the error, so that the central axis of the plunger rod can incline or deviate 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 blocking surface of the plug end playing the role of axial blocking is unstable, and then part of the snap ring slips from the accommodating space between the stop body and the plunger rod in the plugging or pulling process and falls into the bottom of the slot, and the phenomenon of slipping of the snap ring directly causes the weakening of the connection pulling resistance strength of the connecting piece, this is not allowed for the construction industry where safety requirements are extremely high.

Disclosure of Invention

The invention aims to provide a butt joint piece. The anti-slip body of the butt joint piece is not easy to slip in the process of plugging or drawing, so that the success rate of plugging and the connection reliability after plugging can be obviously improved.

Another object of the present invention is to provide a prefabricated part combination connected by the butting piece.

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

a docking piece, comprising:

the connecting sleeve is internally provided with a butt joint cavity;

the stop body is arranged at the plug-in inlet of the butt joint cavity, a butt joint channel which is penetrated from the outer end to the inner end is arranged on the stop body, and a reverse stop surface with the inner diameter gradually increasing along the direction far away from the outer end is formed on the inner end;

the plug rod is provided with a first variable diameter section and a second variable diameter section at the plug end; the outer diameter of the first variable-diameter section is gradually increased along the insertion direction, and the outer diameter of the second variable-diameter section is gradually decreased along the insertion direction; the outer surface of the first reducing section is provided with a falling-off prevention clamping surface, wherein the axial length of the plug rod is greater than that of the stop body;

the anti-slip body is arranged in the connecting sleeve to be wedged into a containing space between the reverse stopping surface and the anti-slip clamping surface after the inserting rod is inserted; the anti-slip body is provided with an outer wedge surface corresponding to the reverse stop surface and an inner wedge surface corresponding to the anti-slip clamping surface;

the contained angle beta 1 of interior wedge face profile generating line and outer wedge face profile generating line is greater than the contained angle beta 2 of reverse backstop face profile generating line and anti-disengaging joint face profile generating line on the end-to-end body, and when the butt joint piece bore axial drawing power, the end-to-end body verts so that outer wedge face profile generating line offsets with reverse backstop face profile generating line, and keeps away from on the end-to-end body the one end at least part embedding of grafting entry first reducing section.

Preferably, the anti-slip body is approximately in a ring petal shape, an included angle α 1 is formed between a contour generatrix of an inner wedge surface of the anti-slip body and a central axis of the anti-slip body, an included angle α 2 is formed between a contour generatrix of the anti-slip clamping surface and a central axis of the plunger, and an angle value of the included angle α 1 is smaller than or equal to an angle value of the included angle α 2;

or, the anti-slip body is approximately in a ring petal shape, tooth parts arranged along the axial direction are arranged on the inner wedge surface of the anti-slip body, an included angle alpha 3 is formed between a contour bus connecting tooth tops of the tooth parts and a central axis of the anti-slip body, an included angle alpha 2 is formed between the contour bus of the anti-slip clamping surface and the central axis of the plunger, and the angle value of the included angle alpha 3 is smaller than or equal to that of the included angle alpha 2.

Preferably, the outer wedge surface of the slip-stop body has a first surface hardness value HRC₁The reverse stop surface of the stop body has a second surface hardness value HRC₂First surface hardness value HRC₁Greater than the second surface hardness value HRC₂And HRC₁sinβ1cosβ2≤HRC₂<HRC₁；

And/or the anti-slip joint surface of the insert rod has a third surface hardness value HRC₃First surface hardness value HRC₁Greater than a third surface hardness value HRC₃And HRC₁sin(β1+β2)cos(β1-β2)≤HRC₃<HRC₁Wherein β 1 satisfies: beta 1 is more than or equal to 9 degrees and less than or equal to 80 degrees, and beta 2 meets the following requirements: beta 2 is more than or equal to 8 degrees and less than or equal to 79 degrees.

Preferably, the method further comprises the following steps: the elastic component is arranged in the butt joint cavity of the connecting sleeve and used for pushing the anti-falling body towards the direction of the stopping body, wherein the connecting sleeve and the stopping body are fixedly connected or are in an integrated structure;

the outer wedge surface of the anti-slip body is an outer cone surface, an included angle theta 1 is formed between a profile bus of the outer cone surface and the central axis of the anti-slip body, the reverse stop surface is an inner cone surface, an included angle theta 2 is formed between the profile bus of the inner cone surface and the central axis of the butt joint channel, and the angle value of the included angle theta 1 is larger than or equal to that of the included angle theta 2.

Preferably, the inner radius R of the docking cavity₁And the maximum outer radius R of the spigot end₂Preferably, the circumferential two end surfaces of the slip-off preventing body are transited to the inner wedge surface of the slip-off preventing body through an inclined surface or an arc surface.

Preferably, on any cross section of the anti-slip body, the arc center O1 of the outer arc of the anti-slip body is positioned between the arc centers O2 of the inner and outer arcs of the anti-slip body so that the wall thickness of the anti-slip body is gradually reduced from the middle to the two circumferential ends, 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 more than or equal to the middle wall thickness of the anti-slip body;

two circumferential end surfaces of the anti-slip body are transited to the inner wedge surface of the anti-slip body through an inclined surface or an arc surface.

Preferably, the elastic part is a spring, and the upper end of the elastic part is provided with a bearing part for supporting the anti-falling body; the bearing part is provided with an axial section sleeved into the spring from the upper end and a radial section supported at the upper end of the spring, and the bottom of the anti-falling body is supported on the upper surface of the radial section.

Preferably, the elastic part is a spring, and the upper end of the elastic part is provided with a bearing part for supporting the anti-falling body; and a plurality of supporting sheets which are used for supporting the anti-falling body and can be bent downwards under the thrust action of the plunger are arranged on the inner wall of the bearing piece along the circumferential direction.

Preferably, the elastic part is a spring, and the upper end of the elastic part is provided with a bearing part for supporting the anti-falling body; the bearing surface of the bearing part slants downwards from the middle part to the periphery, and the bottom surface of the anti-falling body is an inclined surface with the inclined direction consistent with the inclined direction of the bearing surface.

In order to achieve the other purpose, the invention provides a prefabricated part combination, which comprises a first prefabricated part and a second prefabricated part, wherein the first prefabricated part and the second prefabricated part are connected through a connecting piece, the connecting piece is the butt joint piece, the plug rod of the butt joint piece is arranged on the first prefabricated part, and the connecting sleeve, the stop body, the anti-falling body and the elastic part of the butt joint piece are arranged on the second prefabricated part.

The butt joint part provided by the invention is provided with a reverse stopping surface at the inner end of a butt joint channel, an anti-falling clamping surface is formed on a first reducing section of the inserted bar, an outer wedge surface and an inner wedge surface are formed on the anti-falling body, after the insertion connection is completed, the anti-falling body can be wedged into an accommodating space between the reverse stopping surface and the anti-falling clamping surface, at least one part of the outer wedge surface or the outer wedge surface is contacted and wedged with the reverse stopping surface, and at least one part of the inner wedge surface or the inner wedge surface is contacted and wedged with the anti-falling clamping surface, so that the insertion end of the inserted bar is clamped in the connecting sleeve, and the function of the insertion connection is realized; moreover, because contained angle beta 1 of wedge surface profile generating line and outer wedge surface profile generating line in the retaining body is greater than reverse backstop face profile generating line and anti-disengaging joint face profile generating line contained angle beta 2, when the butt joint spare bears the axial drawing power, the outer wedge surface and the reverse backstop face of the retaining body offset, and keep away from on the retaining body the one end at least part embedding of grafting entry first reducing section is in order to form stable structure that stops, avoids the retaining body butt joint spare to bear the axial drawing power in-process from the accommodation space slippage between backstop body and the plunger to make all retaining bodies in the adapter sleeve all can play reverse clamping effect, and then show the anti-pulling connection reliability after improving the success rate of grafting and pegging graft.

The prefabricated part combination provided by the invention is provided with the butt joint piece, and the butt joint piece has the technical effects, so that the prefabricated part combination provided with the butt joint piece also has corresponding technical effects.

Drawings

Fig. 1 is a schematic structural diagram of a docking piece in a plugging state according to an embodiment of the present invention;

FIG. 2 is a schematic view of the docking member of FIG. 1 shown in a configuration in which the disengagement member is positioned between the docking cavity and the maximum outer radius of the mating end during the mating process;

fig. 3 is a schematic structural view of the connecting sleeve shown in fig. 1;

FIG. 4 is a schematic view of the stopper shown in FIG. 1;

FIG. 5 is a schematic view of the plunger of FIG. 1;

FIG. 6 is a schematic view of the structure of the slip stopper shown in FIG. 1;

FIG. 7 is a schematic structural view of concave-convex teeth arranged on the inner wedge surface of the knockout;

FIG. 8 is a schematic view showing a structure in which the wall thickness of the run-off body decreases from the center to both circumferential ends;

FIG. 9 is a schematic structural view of two circumferential end surfaces of the run-off body being transited to an inner wedge surface through an inclined surface;

fig. 10 is a schematic structural diagram of a carrier according to an embodiment of the disclosure;

fig. 11 is a schematic structural diagram of another bearing component disclosed in the embodiment of the invention;

fig. 12 is a cross-sectional view of the support tab of the carrier shown in fig. 11 after being bent;

fig. 13 is a schematic structural diagram of another carrier disclosed in the embodiment of the present invention.

FIG. 14 is a schematic structural diagram of another docking component according to the embodiment of the present invention in a plugged state;

FIG. 15 is a schematic structural diagram of a butt-joint part in a pulled state according to an embodiment of the present invention;

fig. 16 is an enlarged schematic view of a portion a in fig. 14.

In the figure:

1. the anti-slip device comprises a connecting sleeve 2, a stop body 3, an inserting rod 4, a slip-preventing body 5, a reverse stop surface 6, a threaded connecting section 7, a screwing operation part 8, an inserting guide section 9, a first reducing section 10, a second reducing section 11, an equal diameter section 12, a slip-preventing clamping surface 13, a slip-preventing body limiting surface 14, an axial blocking surface 15, a bottom surface 16, an outer wedge surface 17, an inner wedge surface 17a, an inclined surface 18, an outer vertical surface 19, a concave-convex tooth 20, a spring 21, a bearing member 22, an axial section 23, a radial section 24, a bent part 25, a supporting piece 26, a supporting surface 27, a butt joint channel 28, a butt joint cavity 29 and a containing space.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In this specification, terms such as "upper, lower, inner, and outer" are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, the terms are not to be construed as absolutely limiting the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a docking piece according to an embodiment of the present invention; fig. 2 is a schematic view of the docking member of fig. 1 with the disengagement stopping body between the docking cavity and the maximum outer radius of the mating end during the plugging process.

As shown in the drawings, in a specific embodiment, the docking member provided by the present invention mainly comprises a connecting sleeve 1, a stopping body 2, an insert rod 3, a slip-off preventing body 4, an elastic component, and the like, wherein the connecting sleeve 1 is used to be embedded in a concrete material of a certain prefabricated component to be connected, the elastic component and the slip-off preventing body 4 are installed inside the connecting sleeve 1, the stopping body 2 is provided at an insertion inlet of the docking cavity 28, and is used to retain the slip-off preventing body 4 and the elastic component in the connecting sleeve 1 on one hand, and is used to cooperate with the insert rod 3 and the slip-off preventing body 4 on the other hand, so that the insert rod 3 can be maintained at an insertion position after being inserted into the connecting sleeve 1, and cannot be disengaged from the.

Referring to fig. 3 and 4, fig. 3 is a schematic structural view of the connecting sleeve shown in fig. 1; fig. 4 is a schematic structural view of the stopper shown in fig. 1.

As shown in the figure, the connection sleeve 1 is a cylindrical nut, the outer periphery of the main body portion of the connection sleeve is a cylindrical outer surface, the outer periphery of the lower end of the connection sleeve is provided with at least one straight surface, for example, the outer periphery of the lower end of the connection sleeve is a polygonal structure, a connection cavity 28 is formed inside the connection cavity, an internal thread is processed on the upper half portion of the connection cavity 28, a necking portion is formed at the lower end of the connection cavity 28, and the necking portion can be clamped with a main stress rib with a pier head at the end portion so as to be connected with the main stress. Certainly, for the connection of the stressed main reinforcement in the concrete cast-in-place construction operation occasion, the connecting sleeve 1 can also be screwed or clamped at the end part of the stressed main reinforcement.

The stopping body 2 is in a revolving body shape, and an external thread is processed on the outer surface of the stopping body so as to be connected with an internal thread of the connecting sleeve 1 through the external thread, so that the stopping body is installed at the end part of the connecting sleeve 1, the stopping body 2 is provided with a butt joint channel 27 which penetrates from the outer end (the upper end in fig. 4) to the inner end (the lower end in fig. 4), the butt joint channel 27 is in an inverted cone shape, the diameter of the upper end of the butt joint channel is larger than that of the lower end of the butt joint channel, the inner end of the butt joint channel is provided with a reverse stopping surface 5.

Referring to fig. 5, fig. 5 is a schematic structural view of the plunger shown in fig. 1.

As shown in the figure, the plunger 3 is in the shape of a solid of revolution, and in the axial direction from top to bottom, the plunger 3 sequentially has a threaded connection section 6, a screwing operation part 7, a plugging guide section 8, a first reducing section 9 and a second reducing section 10, wherein the threaded connection section 6 is used for connecting with a connector provided with an internal thread on other prefabricated components, that is, the plunger 3 is connected to another prefabricated component through a thread, the screwing operation part 7 can be in a polygonal structure, for example, a section of a nonagon or an undecagon, etc., so that the plunger 3 can be screwed by a tool to rotate for connection or disassembly operation, the plugging guide section 8 is substantially in the shape of an inverted cone with an upper end diameter larger than a lower end diameter, and during plugging, the plunger 3 can be guided to be plugged into the connecting sleeve 1 substantially along the central axis of the stopping body 2 by matching the plugging guide section 8 with the butting passage 27 of the stopping body 2, after the plugging is finished, the central axes of the plug and the stop body are basically coincident, a forward stop surface is formed at the upper end of the stop body 2, the step part at the upper end of the plugging guide section 8 can be supported on the forward stop surface to control the depth of the plug rod 3 inserted into the connecting sleeve 1 and prevent the plug rod 3 from being excessively inserted into the connecting sleeve 1, the forward stop surface and the anti-falling body 4 are combined together to lock the axial position of the plug rod 3 relative to the stop body 2, wherein in order to ensure the effective matching of the plug rod 3 and the stop body 2, the axial length of the plug rod 3 is greater than the axial length of the stop body 2.

First reducing section 9 and second reducing section 10 form the reducing bayonet joint of plunger 3 together, the external diameter of first reducing section 9 is crescent along the direction of insertion (from last direction down in fig. 1 promptly), the external diameter of second reducing section 10 reduces along the direction of insertion gradually, first reducing section 9 and second reducing section 10 integrated into one piece, can have a little section constant diameter section 11 between the two, constant diameter section 11 can improve the anti-drawing force of axial between the body 4 of only taking off and the reducing bayonet joint, second reducing section 10 is the segment form, has a lower terminal surface of cutting flat.

Wherein, the outer surface of the first reducing section 9 is formed with a separation-proof clamping surface 12, a separation-proof body limiting surface 13 is formed between the separation-proof clamping surface 12 and the insertion guide section 8, the separation-proof body limiting surface 13 can prevent the separation-proof body 4 from entering into the insertion guide section 8 and the butt joint channel 27, two axial stop surfaces 14 are formed on the separation-proof clamping surface 12 on the outer surface of the first reducing section 9, the bottom of the separation-proof body 4 can be clamped on the axial stop surfaces 14, so that when the inserted bar 3 is under the action of pulling force, the separation-proof body 4 slides downwards relative to the inserted bar 3 to cause the increase of the connection gap of the prefabricated component and the reduction of the connection reliability.

Referring to fig. 6, fig. 6 is a schematic structural view of the anti-slip body shown in fig. 1.

As shown in the figure, the anti-slip body 4 is arranged in the connecting sleeve 1 to be wedged into the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12 after the inserting rod 3 is inserted, the anti-slip body 4 is provided with 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, a profile generatrix of the inner wedge surface 17 of the anti-slip body 4 forms an included angle α 1 with a central axis of the anti-slip body 4, a profile generatrix of the outer wedge surface 16 of the anti-slip body 4 forms an included angle θ 1 with the central axis of the anti-slip body 4, the angle value of θ 1 is larger than the angle value of α 1, and a longitudinal arc outer vertical surface 18 is arranged between the outer wedge surface 16 and the bottom.

Specifically, the separation preventing body 4 may be a separate structure or an integrated structure before use, and the two structures will be described below.

If the anti-slip body 4 is a split structure, the anti-slip body 4 is approximately in a ring valve shape, a plurality of anti-slip bodies 4 (for example, 2 to 6) are distributed in a ring shape by taking the central axis of the connecting sleeve 1 as the center, in the front section stroke of the inserting rod 3 inserted into the connecting sleeve 1 and contacted with the anti-slip body 4 through the second reducing section 10, the anti-slip body 4 can at least move downwards along the reverse stopping surface 5 in an inclined way and disperse in the radial direction, during the rear stroke of the insertion rod 3 inserted into the connecting sleeve 1 and contacting the anti-slip body 4 through the first reducing section 9, the anti-slip body 4 can move at least obliquely upwards along the reverse stop surface 5 and can be folded radially to wedge into the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12, after the plug-in is completed, the outer wedge surface 16 or at least a part of the outer wedge surface 16 of each slip-off prevention body 4 is in contact with the counter stop surface 5 of the stop body 2, and the inner wedge surface 17 or at least a part of the inner wedge surface 17 of each slip-off prevention body 4 is in contact with the slip-off prevention contact surface 12 of the plunger 3.

If the plug is an integral structure which is an annular structure as a whole and is provided with a plurality of annular valve bodies, each annular valve body is distributed in an annular mode by taking the central axis of the connecting sleeve 1 as the center and is connected into a whole by a minimum wall thickness at the outer side and/or the bottom, the plug can be split into a plurality of annular valve bodies in the front section stroke of the plug 3 which is inserted into the connecting sleeve 1 and is contacted with the connecting sleeve through the second reducing section 10, each annular valve body is a slip-preventing body 4, each slip-preventing body 4 can at least move downwards along the reverse stop surface 5 and be dispersed radially, in the rear section stroke of the plug 3 which is inserted into the connecting sleeve 1 and is contacted with the slip-preventing body 4 through the first reducing section 9, the slip-preventing body 4 can at least move upwards obliquely along the reverse stop surface 5 and be folded radially to be wedged into the accommodating space 29 between the reverse stop surface 5 and the slip-preventing surface 12, and after the plugging is finished, at least one part of the outer surface 16 or the outer surface 16 of each slip-preventing body 4 is contacted with the reverse wedge stop surface, the inner wedge surface 17 of each slip-off stopper 4 or at least a part of the inner wedge surface 17 is in contact with the slip-off preventing engagement surface 12 of the plunger 3.

For the components of a whole that can function independently structure, the body 4 that takes off that ends of integral type structure can be stood on bearing piece 21 steadily, and the focus is stable, and when the inserted bar 3 exerted axial thrust and/or kept away from the radial thrust of axis to the body 4 that takes off, can avoid the second reducing section 10 of inserted bar 3 to push up and turn over or push off the body 4 that takes off that ends to guarantee grafting success rate and resistance to plucking intensity.

As shown in fig. 14 and 16, in order to prevent the slip-preventing body abutment from slipping out of the receiving space 29 between the stop body 2 and the plunger 3 during the axial drawing force, the included angle between the profile generatrix of the slip-preventing body inner wedge surface 17 and the profile generatrix of the outer wedge surface 16 is greater than the included angle β 2 between β 1 the profile generatrix of the counter stop surface 5 and the profile generatrix of the slip-preventing abutment surface 12, where β 1 satisfies: beta 1 is more than or equal to 9 degrees and less than or equal to 80 degrees, and beta 2 meets the following requirements: beta 2 is more than or equal to 8 degrees and less than or equal to 79 degrees; as shown in fig. 15, when the abutting piece is subjected to an axial drawing force, the outer wedge surface 16 of the anti-slip body 4 abuts against the reverse stop surface 5, and an end of the anti-slip body 4 away from the insertion inlet is at least partially embedded into the first diameter-changing section 9, at this time, the stop body 2, the plunger 3, and the anti-slip body 4 are all in a relative position locking fixed state.

Furthermore, an included angle α 1 is formed between a contour generatrix of the inner wedge surface 17 of the anti-slip body 4 and a central axis of the anti-slip body, an included angle α 2 is formed between a contour generatrix of the anti-slip clamping surface 12 and a central axis of the plunger 3, and an angle value of the included angle α 1 is smaller than or equal to an angle value of the included angle α 2.

If the angle value of the included angle alpha 1 is smaller than the angle value of the included angle alpha 2, the engaging force between the lower part of the slip-off preventing body 4 and the first reducing section 9 is larger, the engaging force between the upper part of the slip-off preventing body 4 and the first reducing section 9 is relatively smaller, the extrusion stress surface between the lower part of the slip-off preventing body 4 and the first reducing section 9 is smaller, and the requirements on the material properties (such as hardness) of the slip-off preventing body 4 and the plunger 3 are high in order to ensure the pull-out resistance.

If the angle value of the included angle alpha 1 is equal to the angle value of the included angle alpha 2, the engaging force of the anti-slip body 4 and the first reducing section 9 along the axial direction is more uniform, the extrusion stress surfaces of the lower part of the anti-slip body 4 and the first reducing section 9 are larger, the extrusion inching deformation is smaller, the mutual engaging effect is good, and the anti-slip device can bear larger axial pulling resistance.

Similarly, the outer wedge surface 16 of the anti-slip body 4 is an outer conical surface, the profile bus of the anti-slip body forms an included angle θ 1 with the central axis of the anti-slip body 4, the reverse stopping surface 5 is an inner conical surface, the profile bus of the anti-slip body forms an included angle θ 2 with the central axis of the butt-joint channel 27, and the angle value of the included angle θ 1 is greater than or equal to that of the included angle θ 2, so that the frictional resistance of the anti-slip body 4 gathered at the peripheral part of the first variable diameter section along the inner conical surface is reduced, and the smoothness of embedding of the anti-slip body 4 is ensured. In the present exemplary embodiment, the center axis of the plunger 3, the center axis of the anti-slip body 4 and the center axis of the stop body 2 are parallel or substantially overlapping.

The upper end of the anti-slip body 4, which is contacted with the insertion end of the plunger 3 in the initial stage, namely the upper part of the inner side of the anti-slip body 4 can be designed into an inclined plane or an arc surface so as to reduce the friction force and the axial thrust of the plunger 3 acting on the anti-slip body 4, so that the anti-slip body 4 is not easy to slip off, and lubricating materials such as lubricating grease and the like can be coated on the contact part of the anti-slip body 4 and the plunger 3 during insertion, or a layer of self-lubricating materials such as polytetrafluoroethylene, polyacetal, polyformaldehyde and the like is compounded at the insertion end of the plunger 3 so as to reduce the friction coefficient between the anti-slip body 4 and the plunger, thereby further reducing the friction force and reducing the possibility of the slip.

On the basis of the above-mentioned embodiments, further improvements can be made, for example, in order to improve the anti-pulling performance of the butt joint, in order to prevent the plug 3 from moving outward in the axial direction due to the slip-off prevention body 4 sliding obliquely downward relative to the plug 3 under the action of the outward pulling force, the outer wedge surface 16 of the slip-off prevention body 4 in pressing contact with the reverse stop surface 5 has at least one insertion portion inserted into the reverse stop surface 5 in the circumferential direction, the reverse stop surface 5 is formed with an inner concave insertion region for accommodating the insertion portion, so that the slip-off prevention body 4 forms a connection structure with the stop body 2, and/or the inner wedge surface 17 of the slip-off prevention body 4 in pressing contact with the slip-off prevention surface 12 has at least one insertion portion inserted into the slip-off prevention surface 12 in the circumferential direction, the slip-off prevention surface 12 is formed with an inner concave insertion region for accommodating the insertion portion, so that the anti-drop body 4 and the plunger 3 form a meshed connection structure.

To achieve this incarceration effect, in at least one embodiment, the outer wedge surface 16 of the pull-off prevention body 4 has a first surface hardness value HRC₁The reverse stop surface 5 of the stop body 2 has a second surface hardness value HRC₂First surface hardness value HRC₁Greater than the second surface hardness value HRC₂And HRC₁sinβ1cosβ2≤HRC₂<HRC₁The anti-slip joint surface 12 of the plunger 3 has a third surface hardness value HRC₃First surface hardness value HRC₁Greater than a third surface hardness value and HRC₁sin(β1+β2)cos(β1-β2)≤HRC₃<HRC₁Wherein the first surface hardness value HRC₁Preferably 50 HRC-54 HRC and the third surface hardness value HRC₃Preferably 36 HRC-45 HRC.

As shown in fig. 15, when the butt-jointed piece is subjected to a pull-out test or an external pulling force in actual use, the anti-falling body 4, the stopper body 2 and the plunger 3 can form a connection structure of mutual engagement and clamping through caulking, so that the pull-out resistance is further improved.

In other embodiments, the retaining body 4 has a maximum radial width W and a maximum axial height H, and in order to prevent the retaining body 4 from tipping over (tipping refers to the fact that the straight line connecting the two points of the longitudinal section of the retaining body 4 which are farthest away is perpendicular or approximately perpendicular to the central axis of the connecting sleeve 1) or falling (dropping refers to the fact that the retaining body 4 is separated from the supporting action surface of the supporting member 21) or falling (the radial maximum width W of the retaining body 4 is smaller than the maximum axial height H of the retaining body 4) under the influence of the plunger 3 during the insertion process, the retaining body 4 has a maximum radial width W and a maximum axial height H, and the inner radius R of the docking cavity 28 is defined as the inner radius R₁And the maximum outer radius R of the spigot end₂The difference Δ R of (a) is designed to be greater than the radial maximum width value W of the anti-slip body 4 and less than the axial maximum height value H of the anti-slip body.

In the process of inserting the plug-in rod 3, before the anti-slip body 4 does not enter the accommodating space 29 between the reverse stop surface 5 and the anti-slip clamping surface 12, the stroke of the anti-slip body 4 can be roughly divided into a first stroke, a second stroke and a third stroke, after the structure is adopted, when the anti-slip body 4 touches the end part of the plug-in rod 3 in the first stroke, the contact part of the anti-slip body 4 and the contact part is closer to the maximum outer diameter part of the plug-in end of the plug-in rod 3, and the included angle between the tangent of the contact part and the central axis is smaller, so that the included angle between the resultant force of the plug-in rod 3 acting on the anti-slip body 4 and the central axis is larger, tends to be more decomposed into radial acting force and less decomposed into axial acting force, and; in the second stroke, on one hand, the anti-slip body 4 in the stroke moves outwards and radially for a certain distance, the contact part of the anti-slip body 4 and the insertion end of the plunger 3 is closer to the maximum outer diameter part of the insertion end of the plunger 3, on the other hand, the peripheral part of the anti-slip body 4 can be timely contacted with the inner wall of the butt joint cavity 28, so that the anti-slip body 4 is effectively supported by the inner wall of the butt joint cavity 28, and under the supporting action of the inner wall of the butt joint cavity 28, a reverse moment resisting the further overturning of the anti-slip body 4 can be formed, and the anti-slip body 4 can be effectively prevented from toppling over and even falling off in two aspects; in the third stroke, a sufficient tilting space (see fig. 2) cannot be formed between the maximum outer diameter portion of the insertion end of the plunger 3 and the inner wall of the abutting cavity 28, and in the case of a limited tilting space, the falling or even dropping of the retaining body 4 is impossible, and in each of the above strokes, even if the retaining body 4 is deflected to a certain extent, the structure can prevent the deflected posture from further deteriorating, and after the retaining body 4 starts to enter the accommodating space 29 between the reverse stopping surface 5 and the anti-slip engagement surface 12, the retaining body 4 can gradually return to the normal posture under the restriction and guide action of the accommodating space 29. The anti-falling body 4 is not easy to fall in the plugging process, so that the plugging success rate and the connection reliability after plugging can be obviously improved.

Referring to fig. 7, fig. 7 is a schematic structural view of concave-convex teeth on the inner wedge surface of the retainer.

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in the figure, in order to further improve the anti-pulling performance of the butt joint piece, concave-convex teeth 19 arranged along the axial direction can be processed on an inner wedge surface 17 of the anti-falling body 4, and the tooth part is designed to improve the gripping force of the anti-falling body 4 on the anti-falling clamping surface 12, especially the axial blocking surface 14 processed on the anti-falling clamping surface 12 can be clamped, so that the anti-falling body 4 is prevented from sliding downwards relative to the anti-falling clamping surface 12 of the plunger 3, the connection reliability of the prefabricated parts connected by the butt joint piece is ensured, the gap after connection is not easy to be enlarged, and the butt joint piece can be more resistant to pulling.

Because the concave-convex teeth 19 are processed on the inner wedge surface 17 of the anti-slip body 4, the tooth tips of the concave-convex teeth 19 are sequentially far away from the central axis of the anti-slip body 4 in the direction from the first reducing section 9 to the second reducing section 10; the contour generatrix connecting the tooth tips is a straight line, an included angle alpha 3 is formed between the contour generatrix connecting the tooth tips of the tooth parts and the central axis of the anti-release body 4, an included angle alpha 2 is formed between the contour generatrix of the anti-release clamping surface 12 and the central axis of the plunger 3, and the angle value of the included angle alpha 3 is smaller than or equal to the angle value of the included angle alpha 2.

If the angle value of the included angle alpha 3 is smaller than the angle value of the included angle alpha 2, the engaging force between the concave-convex teeth 19 at the lower part of the anti-slip body 4 and the first reducing section 9 is larger, while the engaging force between the concave-convex teeth 19 at the upper part of the anti-slip body 4 and the first reducing section 9 is relatively smaller, namely, only part of the concave-convex teeth 19 play a role of engaging force, and the requirements on the material performance (such as hardness) of the anti-slip body 4 and the plunger 3 are high in order to ensure the anti-pull performance.

If the angle value of the included angle alpha 3 is equal to the angle value of the included angle alpha 2, the occlusion force of each concave-convex tooth 19 and the first reducing section 9 is relatively uniform, the occlusion acting force of each concave-convex tooth 19 can be exerted, the occlusion effect between the concave-convex teeth is good, and the axial pull-out resistance is relatively large.

The butt joint piece provided by the embodiment improves the biting force of the inner wall of the anti-slip body 4 and the first reducing section 9 by arranging the concave-convex teeth 19 on the inner wall of the anti-slip body 4, and further improves the axial pulling resistance of the butt joint piece.

Referring to fig. 8 and 9, fig. 8 is a schematic structural view showing a structure in which the wall thickness of the stop body decreases from the middle to both circumferential ends; fig. 9 is a schematic structural view of the transition from two circumferential end surfaces of the run-off body to the inner wedge surface through inclined surfaces.

As shown in the drawings, in the docking member provided in the present embodiment, on any cross section of the slip-preventing body 4, the outer arc center O1 of the slip-preventing body 4 is located between the inner arc F and the inner arc center O2, so that the wall thickness of the slip-preventing body 4 decreases from the middle to both ends in the circumferential direction, and the shortest straight distance L3 from the outer arc center O1 to the inner arc center O2 is greater than or equal to the middle wall thickness of the slip-preventing body 4; when the inner arc F and the outer arc of the slip-off preventive body 4 are designed to be non-concentric, the radius F of the inner arc can be increased appropriately.

In this embodiment, in order to ensure that the first diameter-changing section 9 is effectively and reliably locked in the reverse direction by the slip-off preventing body 4, the minimum inner circular arc F of the slip-off preventing body 4 has a radius equal to or larger than the minimum outer diameter of the first diameter-changing section 9.

For embodiment one, the interior circular arc radius of only taking off body 4 can be rationally expanded to the interfacing part that this embodiment provided under the condition of control only taking off body 4 wall thickness, can enough avoid interfering the smooth penetration of plunger 3 because of the both ends of only taking off body 4 circumference that interior circular arc radius undersize leads to, prevent that only taking off body 4 from empting, can also make the inner wall and the lower terminal surface of only taking off body 4 can be with the arbitrary axial position of the first reducing section 9 of area of contact butt of maximize, avoid only taking off body 4 and first reducing section 9 to cause the pull-out when bearing the axial pulling force because of area of contact, improve the resistance to plucking performance of connecting element.

Of course, in order to achieve the above effects and avoid interference between the circumferential ends of the inner wall of the slip-off preventing body 4, one or both circumferential end surfaces of the slip-off preventing body 4 may be chamfered or rounded, that is, the circumferential end surfaces of the slip-off preventing body 4 are transited to the inner wedge surface 17 of the slip-off preventing body 4 by the inclined surface 17a (or the arc surface).

In the course of studying how to prevent the falling of the stopper 4, the inventors found that the elastic member for urging the stopper 4 toward the stopper 2 also has a crucial influence, and therefore, improving the stability of the stopper 4 by improving the elastic member becomes a direction which has never been previously referred to but is practical.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a carrier according to an embodiment of the disclosure.

As shown in the figure, the elastic component mainly comprises two parts, namely a spring 20 and a carrier 21, wherein the spring 20 is used for generating upward elastic force, so that the anti-slip body 4 always has a tendency of returning to the reverse stop surface 5 or is pressed on the reverse stop surface 5, and by providing the carrier 21, the anti-slip body 4 can be placed above the carrier 21 more quickly and stably, and the elastic force of the spring 20 can be transmitted to the anti-slip body 4 uniformly.

A typical carrier 21 is to accommodate the upper end of the spring 20 in the inner cavity of the carrier 21, the axial section of the carrier 21 is located outside the spring 20, and the axial section needs to have a certain wall thickness, so that the radial dimension of the spring 20 is relatively small, and a large gap exists between the spring 20 and the inner wall of the connecting sleeve 1, which causes the spring 20 to be easily stressed unevenly to generate flexural deformation when the spring 20 is subjected to the thrust of the plunger 3, especially when the plunger 3 is inserted in a skewed or off-center condition, and further causes the carrier 21 and the anti-slip body 4 on the carrier 21 to slip off due to skew.

In contrast, the invention redesigns the bearing part 21, the improved bearing part 21 has the axial section 22 which is sleeved into the spring 20 from the upper end and the radial section 23 which is supported on the upper end of the spring 20, the axial section 22 and the radial section 23 are both hollow structures, the two inner holes are communicated up and down, the bottom of the anti-falling body 4 is supported on the upper surface of the radial section 23, the outer side surface of the radial section 23 is arc-shaped, so as to reduce the contact area with the inner wall of the connecting sleeve 1 and avoid generating excessive friction resistance in the up-and-down movement process.

In addition to increasing the radial width of the carrier 21 and improving the stability of the anti-slip body 4 on the carrier 21, the carrier 21 has an axial section 22 which projects from the inside into the interior of the spring 20, and the spring 20 is located outside the axial section 22 of the carrier, so that 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 reduced. Thus, even when the plunger 3 is inserted with being tilted or deviated from the center line, the spring 20 is not easily inclined or deflected, and more reliable bottom support can be provided to the stopper 4, so that the stopper 4 is not easily slid and has better stability.

Referring to fig. 11 and 12, fig. 11 is a schematic structural diagram of another carrier disclosed in the embodiment of the present invention; fig. 12 is a cross-sectional view of the support tab of the carrier shown in fig. 11 after being bent.

As shown in the drawings, in another embodiment, the supporting member 21 has a substantially flat ring shape, the outer edge of the supporting member is bent downward to form a bent portion 24, the inner side of the bent portion 24 is a space for accommodating the upper end of the spring 20, a plurality of supporting pieces 25 are circumferentially provided on the inner wall of the supporting member 21, the supporting pieces 25 are used for supporting the anti-slip body 4 upward, and during the insertion of the plunger 3, the supporting pieces 25 can be bent downward under the pushing force of the plunger 3 without affecting the normal insertion of the plunger 3.

Because the supporting sheet 25 is arranged on the inner wall of the bearing piece 21, at the initial stage of inserting the plunger 3, the supporting sheet 25 can upwards support the anti-slip body 4 at the position deviated to the inner side, so as to prevent the anti-slip body 4 from slipping under the driving of the plunger 3, after the initial stage, the anti-slip body 4 has outwards moved radially for a certain distance, and at the moment, even if the anti-slip body 4 is not supported by the supporting sheet 25, the risk of slipping is also greatly reduced.

The supporting piece 25 shown in the figure is triangular, the vertex angle of the supporting piece points to the outside along the radial direction, and the supporting piece is connected with the bearing piece body into a whole through the vertex angle part and can be manufactured by adopting a plate punch forming mode. The structure has the advantages that the part of each supporting sheet 25 close to the circle center has larger width, the anti-falling body 4 can be effectively supported, meanwhile, the width of the root of each supporting sheet 25 is smaller, the supporting sheets are easy to deform and bend when being pressed, and the inserting rod 3 cannot be prevented from being smoothly inserted into the connecting sleeve 1.

It is understood that the shape of the supporting pieces 25 is not limited to a triangle, and may be various shapes such as a rectangle, a trapezoid, a circle, a semicircle, etc., the number of the supporting pieces may be determined according to the number and the size of the anti-slip bodies 4, in order to ensure that each anti-slip body 4 can be supported by at least one supporting piece 25, the circumferential width of the gap formed between two adjacent supporting pieces 25 may be smaller than the circumferential width of the anti-slip body 4, and the supporting pieces 25 may be formed on the bearing member 21 as an integral part, or may be in a separate connection structure with the bearing member 21, and the two supporting pieces may be separately manufactured and then connected together by assembling.

In order to facilitate the downward bending deformation of the support sheets 25, indentations or grooves with a certain depth may be formed at the root of each support sheet 25 along the expected bending line. Like this, under the prerequisite of guaranteeing the supporting effect, can weaken the joint strength of backing sheet 25 and layer board body, make backing sheet 25 bend downwards along indentation or recess easily when the pressurized to give up the passageway of inserting of plunger 3.

Referring to fig. 13, fig. 13 is a schematic structural diagram of another carrier according to an embodiment of the disclosure.

As shown in the drawings, in another embodiment, the carrier 21 has a substantially flat ring shape, the outer edge of the carrier is bent downward to form a bent portion 24, the inside of the bent portion 24 is a space for accommodating the upper end of the spring 20, the supporting surface 26 of the top of the carrier 21 is inclined downward from the middle to the periphery, and the bottom surface 15 of the anti-slip body 4 is also inclined downward from the middle to the periphery in a direction corresponding to the inclination direction of the supporting surface 26.

Because the contact surface of the anti-slip body 4 and the bearing piece 21 is an inclined surface, the anti-slip body 4 always has the tendency of moving outwards and downwards relative to the bearing piece 21, when the anti-slip body 4 is under the thrust action of the push rod, the anti-slip body 4 is more easily moved outwards and downwards, and the tendency of the anti-slip body 4 moving outwards and downwards can offset the tendency of falling inwards to a certain extent, so that the anti-slip body 4 is not easy to fall inwards.

If the angle of the bearing surface 26 inclining obliquely downward is too large, the area of the inner wedge surface 17 of the detachment prevention body 4 becomes too small, and if the angle of the bearing surface 26 inclining obliquely downward is too small, the tendency of the detachment prevention body 4 moving outward and downward is not significant, so that the angle of the bearing surface 26 inclining obliquely downward, that is, the angle of the bearing surface 26 to the horizontal plane can be designed to be 1 ° 60 °, in this embodiment, the angle of the bearing surface 26 to the horizontal plane can be preferably designed to be 5 ° 15 ° in combination with the shape and dimensional requirements of the connecting sleeve 1.

When the connecting device is used, the spring 20, the bearing part 21, the anti-release body 4 and the stopping body 2 of the butt joint part are sequentially arranged in the connecting sleeve 1, the connecting sleeve 1 can be pre-embedded in a concrete prefabricated part (such as a concrete prefabricated pile) and is connected with a stress rib in the concrete prefabricated part, the anti-release body 4 is supported on the reverse stopping surface 5 at the lower end of the stopping body 2 under the action of the elastic force of the spring 20, the inserted rod 3 is connected with another concrete prefabricated part (another concrete prefabricated pile) through the connecting end with threads, the inserting end of the inserted rod 3 is inserted into the connecting sleeve 1 during connection, so that the second diameter-changing section 10 of the inserting end is contacted with and penetrates through the anti-release body 4, the anti-release body 4 is pushed to move downwards against the elastic force of the spring 20, the anti-release body 4 is radially expanded, the anti-release body 4 is continuously inserted downwards along with the inserted rod 3, after the maximum diameter part of the inserting end exceeds the anti-release body 4, the anti-release body 4, a necking part is formed at the lower end of the stop body 2, so that the first reducing section 9 of the inserting end and the anti-disengaging body 4 form abutting fit, and in the whole inserting process, the anti-disengaging body 4 slides to the position embedded into the annular accommodating space 29 along the outer surface of the inserting end of the plug rod 3, so that the plug rod 3 is prevented from being pulled out of the connecting sleeve 1, and quick connection is realized.

Referring to fig. 14, fig. 14 is a schematic structural view of another docking piece in a plugging state according to an embodiment of the disclosure.

As shown, the difference between the first embodiment and the second embodiment is that: the stop body 2 and the connecting sleeve 1 are of an integrated structure and can be manufactured by adopting the forming modes of die stamping, stretching and the like. The structure has the advantages that the integral strength of the stop body 2 and the connecting sleeve 1 is improved, so that the connection reliability after plugging can be obviously improved.

Further, since the stopping body 2 and the connecting sleeve 1 are of an integral structure, in order to facilitate the sequential installation of the wedge-in body 4, the carrier 21 and the spring 20, the minimum inner diameter of the lower end of the docking cavity 28 on the connecting sleeve 1 is larger than the maximum outer diameters of the wedge-in body 4, the carrier 21 and the spring 20, and the minimum inner diameter of the stopping body 2 is smaller than the maximum outer diameter of the wedge-in body 4 in order to prevent the wedge-in body 4 from being lifted out of the stopping body 2. Furthermore, because the stopping body 2 and the connecting sleeve 1 are of an integral structure, in order to facilitate the sequential installation of the wedge-in body 4, the carrier 21 and the spring 20, the minimum inner diameter of the lower end of the butt joint cavity 28 on the connecting sleeve 1 is larger than the maximum outer diameters of the wedge-in body 4, the carrier 21 and the spring 20, and in order to prevent the wedge-in body 4 from being lifted out of the stopping body 2, the minimum inner diameter of the stopping body 2 is smaller than the maximum outer diameter of the wedge-in body 4. When the installation is carried out, the wedging body 4 is firstly placed into the butt joint cavity 28 through the lower end of the butt joint cavity 28 on the connecting sleeve 1, then the bearing part 21 is placed, the bearing part 21 is used for supporting the wedging body 4, finally the spring 20 is placed, the connecting sleeve 1 is in threaded connection with a main stress rib (such as a steel bar, a threaded steel and the like) of a prefabricated part, the spring 20 is used for generating thrust towards the stopping body 2, the anti-release body 4 always has a tendency of resetting towards the reverse stopping surface 5 or is tightly pressed on the reverse stopping surface 5, the bearing part 21 can uniformly transmit the elastic force of the spring 20 to the wedging body 4, the wedging body 4 can be of a split structure or an integrated structure, the wedging body 4 preferably adopts an integrated structure, the anti-release body 4 of the integrated structure can be stably erected on the bearing part 21, and the center of gravity is stable. After the wedging body 4, the bearing part 21 and the spring 20 are sequentially installed, the butt joint cavity 28 on the connecting sleeve 1 can be connected with the main stress bar, preferably, the end part of the main stress bar is connected through a screw joint or a clamping joint, wherein the end part of the main stress bar is used for supporting one end of the spring 20, which is far away from the bearing part 21.

Furthermore, the wedging body 4, the bearing part 21 and the spring 20 are installed before the connecting sleeve 1 is connected with the main stress rib, so that the connecting sleeve 1 is in a state of being capable of being directly used after prefabrication of the prefabricated part is completed, connection operation of adjacent prefabricated parts can be carried out only by completing connection of the inserting rod 3 during site construction, connection efficiency of the prefabricated parts is improved, construction efficiency is improved, and construction cost is reduced.

The above embodiments are merely preferred embodiments of the present invention, and are not limited thereto, and on the basis of the above embodiments, various embodiments can be obtained by performing targeted adjustment according to actual needs. For example, a circumferential groove is formed on the anti-slip surface 12 of the first diameter-changing section 9 of the plunger 3 to prevent the slip-off body 4 from sliding downward relative to the plunger 3, or the second diameter-changing section 10 of the plunger 3 is formed in a hemispherical shape, or the spring 20 and the carrier 21 are formed in an integral structure, or the like. This is not illustrated here, since many implementations are possible.

In addition, the technical solutions between the embodiments can be combined with each other, but should be based on the realization of those skilled in the art. For example, in order to improve the anti-toppling capability, the supporting pieces 25 may be disposed on the inner wall of the bearing member 21, and the bearing surface 26 of the bearing member 21 may be designed as an inclined surface inclined obliquely downward from the middle portion to the periphery, that is, the embodiment shown in fig. 10 and 11 and the embodiment shown in fig. 12 may be combined with each other. If a combination of features appears to be contradictory or otherwise impractical, it is contemplated that such a combination of features does not exist and is not within the scope of the claimed invention.

In addition to the above-mentioned butt joint, the present invention provides a prefabricated part combination, which comprises a first prefabricated part and a second prefabricated part which are connected, wherein the first prefabricated part and the second prefabricated part are connected through the above-mentioned butt joint.

Specifically, the plunger 3 of the butt joint piece is arranged on a first prefabricated part, the plunger 3 can be detachably connected to the first prefabricated part through an external thread, the spring 20, the bearing piece 21, the anti-falling body 4 and the stopping body 2 of the butt joint piece are arranged on the connecting sleeve 1 (such as a sleeve nut) of a second prefabricated part, and the first prefabricated part and the second prefabricated part are firmly connected together through the clamping fit between the first reducing section 9 of the plunger 3 of the connecting piece and the anti-falling body 4 in the connecting sleeve 1.

Under the service environment that has the corrosivity to metal such as acid-base, in order to avoid the atress muscle of two prefabricated components and butt joint spare to rust because of exposing, can be at the terminal surface coating epoxy that the prefabricated component is connected, simultaneously, pack epoxy in adapter sleeve 1, moreover, through filling epoxy, can further improve the resistance to plucking performance of butt joint spare.

The prefabricated component combination can be a combination of a concrete prefabricated pile or a concrete prefabricated pile cap or a concrete prefabricated plate or a concrete prefabricated wall or a concrete prefabricated column or a concrete prefabricated beam or a concrete prefabricated balcony or a concrete prefabricated bay window or a concrete prefabricated staircase or a concrete prefabricated elevator shaft or a concrete prefabricated roof or a concrete prefabricated terrace.

The assembly of the butt piece and the prefabricated member provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A docking member, comprising:

the connecting sleeve is internally provided with a butt joint cavity;

2. The butt joint piece according to claim 1, wherein the anti-slip body is substantially ring-petal-shaped, a profile generatrix of an inner wedge surface of the anti-slip body forms an included angle α 1 with a central axis of the anti-slip body, a profile generatrix of the anti-slip clamping surface forms an included angle α 2 with a central axis of the plunger, and an angle value of the included angle α 1 is smaller than or equal to an angle value of the included angle α 2;

3. A docking member according to claim 1 or 2, wherein the outer wedging surface of the anti-slip body has a first surface hardness value HRC₁The reverse stop surface of the stop body has a second surface hardness value HRC₂First surface hardness value HRC₁Greater than the second surface hardness value HRC₂And HRC₁sinβ1cosβ2≤HRC₂<HRC₁；

And/or the anti-slip clamping surface of the insert rod has a third surface hardness value HRC₃First surface hardness value HRC₁Greater than a third surface hardness value HRC₃And HRC₁sin(β1+β2)cos(β1-β2)≤HRC₃<HRC₁Wherein β 1 satisfies: beta 1 is more than or equal to 9 degrees and less than or equal to 80 degrees, and beta 2 meets the following requirements: beta 2 is more than or equal to 8 degrees and less than or equal to 79 degrees.

4. A docking station as in claim 1, further comprising: the elastic component is arranged in the butt joint cavity of the connecting sleeve and used for pushing the anti-falling body towards the direction of the stopping body, wherein the connecting sleeve and the stopping body are fixedly connected or are in an integrated structure;

5. A docking station as in claim 1, wherein the docking cavity has an inner radius R₁And the maximum outer radius R of the spigot end₂Difference Δ ofAnd R is greater than the radial maximum width value W of the anti-slip body and less than the axial maximum height value H of the anti-slip body, and preferably, two circumferential end surfaces of the anti-slip body are transited to an inner wedge surface of the anti-slip body through an inclined surface or an arc surface.

6. A docking station according to claim 1, wherein, in 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 arc centers O2 of the inner and inner arcs thereof such that the wall thickness of the anti-slip body decreases from the middle to both circumferential ends, and the shortest straight distance L3 from the arc center O1 of the outer arc to the arc center O2 of the inner arc is equal to or greater than the middle wall thickness of the anti-slip body;

7. A docking station as in any of claims 4 to 6, wherein the resilient member is a spring with a bearing at its upper end for supporting the drop-off prevention body; the bearing part is provided with an axial section sleeved into the spring from the upper end and a radial section supported at the upper end of the spring, and the bottom of the anti-falling body is supported on the upper surface of the radial section.

8. A docking station as in any of claims 4 to 6, wherein the resilient member is a spring with a bearing at its upper end for supporting the drop-off prevention body; and a plurality of supporting sheets which are used for supporting the anti-falling body and can be bent downwards under the thrust action of the plunger are arranged on the inner wall of the bearing piece along the circumferential direction.

9. A docking station as in any of claims 4 to 6, wherein the resilient member is a spring with a bearing at its upper end for supporting the drop-off prevention body; the bearing surface of the bearing part slants downwards from the middle part to the periphery, and the bottom surface of the anti-falling body is an inclined surface with the inclined direction consistent with the inclined direction of the bearing surface.

10. Prefabricated component combination, including first prefabricated component and second prefabricated component, first prefabricated component links with second prefabricated component through the connecting piece, characterized in that, the connecting piece is the butt joint piece of any one of above-mentioned claims 1 to 9, the plunger of butt joint piece is located first prefabricated component, the adapter sleeve, the backstop body, the anti-stripping body and the elastomeric element of butt joint piece locate second prefabricated component.