CN211547703U - Splicing retaining structure and prefabricated part combination - Google Patents

Abstract

The utility model provides a grafting stopping structure and prefabricated component combination, include: the outer sleeve is fixedly connected to one end of the stress rib and is axially provided with an inserting cavity; a plug neck is formed at the part of the inserted link close to the plug connector, and an axial blocking surface is formed between the plug neck and the plug connector; one end part of the stop piece is fixedly connected with the outer sleeve body, and the other end part of the stop piece forms a stop end face of a reverse stop axial stop face in the inserting cavity; the stop piece is provided with a plug channel for the insertion rod to penetrate through, and the maximum radius R1 of the plug is smaller than the radius R2 of the plug cavity and larger than the radius R4 of the plug channel. The utility model discloses a maximum radius R1 of increase bayonet joint, the area that the increase axial kept off the face to the area of contact of increase backstop terminal surface and axial fender face improves the connection reliability of this grafting stopping structure.

Description

Splicing retaining structure and prefabricated part combination

Technical Field

The utility model relates to an insertion component technical field especially relates to carry out grafting stopping structure of plug connection to concrete prefabricated component. The utility model discloses still relate to and be equipped with the prefabricated component combination of grafting stopping structure.

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 prior art discloses a spring clip type connecting piece, which comprises a large nut sleeve, a small nut sleeve, a connecting piece and an inserting rod, wherein the large nut sleeve is connected with the connecting piece in a threaded manner, a plurality of bent elastic pieces are annularly arrayed on one side of the connecting piece, which is accommodated in the large nut sleeve, and an included angle of more than 0 degree is formed between the bent elastic pieces and the inner side wall of the large nut sleeve; one side and the little nut sleeve threaded connection of inserted bar, the annular has been seted up to the opposite side on its periphery, just the annular is keeping away from a side groove face of little nut sleeve sets up to the face of keeping off for spacing to the shell fragment of buckling that connects in this annular, after the inserted bar passed the connecting piece, kept off the face and the shell fragment joint of bending, prevented that the inserted bar from extracting.

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, in the above structure, in order to enable the inserted rod to be capable of propping open the bent elastic piece and to pass through the connecting piece, the sum of the maximum radius of the inserted rod and the wall thickness of the bent elastic piece is inevitably smaller than the inner diameter of the large nut sleeve, otherwise, the bent elastic piece is attached to the inner wall of the large nut sleeve when the bent elastic piece is propped open, so that the bent elastic piece cannot be continuously stretched, and the inserted rod cannot pass through the connecting piece.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art, provide grafting stopping structure. The maximum radius of the plug-in connection stopping structure is increased, so that the area of the stop end face can be increased, the contact area of the stop end face and the axial stop face is increased, and the reliability of the plug-in connection stopping structure in connection is improved.

For solving the technical problem, the utility model discloses a following technical scheme:

grafting stopping structure includes:

the outer sleeve body is fixedly connected to one end part of the stress rib and is axially provided with a splicing cavity;

the part of the inserted rod, which is close to the plug connector, is provided with a plug neck, and an axial blocking surface is formed between the plug neck and the plug connector; and

one end of the stop piece is fixedly connected with the outer sleeve body, and the other end of the stop piece forms a stop end face of a reverse stop axial stop face in the inserting cavity;

the stop piece is provided with a plug channel for the insertion rod to penetrate through, and the maximum radius R1 of the plug is smaller than the radius R2 of the plug cavity and larger than the radius R4 of the plug channel.

Preferably, one end of the stop member connected with the outer sleeve body is provided with a ring body, the other end of the stop member is provided with more than two elastic sheets which are distributed at intervals around the central axis of the ring body, the root parts of the elastic sheets are connected with one end part of the ring body into a whole, and in the direction from the ring body to the elastic sheets, the elastic sheets gradually approach to the central axis of the ring body.

Preferably, the wall thickness of the elastic piece is uniform or gradually reduced in the direction from the annular ring body to the elastic piece, and the sum of the minimum radius R3 of the inserting neck and the minimum wall thickness H of the elastic piece is larger than the minimum inner hole radius R4 of the annular ring body.

Preferably, an included angle α is formed between the axial blocking surface and the central axis, and the value of α is greater than or equal to 45 ° and less than or equal to 90 °.

Preferably, the contact area S1 of the axial stop surface and the stop end surface is larger than the cross-sectional area S2 of the force-bearing rib.

Preferably, the minimum cross-sectional area S3 of the collar is larger than the cross-sectional area S2 of the rib.

Preferably, an inner thread is formed in the inserting cavity of the outer sleeve, and an outer thread matched with the inner thread is formed on the outer wall of the ring body so that the outer sleeve is in threaded connection with the ring body.

Preferably, a plurality of radial grooves are formed in the end part, far away from the elastic piece, of the annular body at intervals along the circumferential direction, and preferably, the radial grooves are uniformly distributed at intervals along the circumferential direction of the annular body.

Preferably, the plug comprises a screw joint body, one end of the inserted bar, which is far away from the plug connector, is a screw joint end matched with the screw joint body, and the screw joint end is screwed with a fastening nut.

Another object of the present invention is to provide a prefabricated component assembly connected by the insertion stop structure.

In order to achieve the other purpose, the utility model provides a prefabricated component combination, including first prefabricated component and second prefabricated component, first prefabricated component and second prefabricated component are connected by foretell grafting stopping structure.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) an axial blocking surface is formed between the inserting neck of the inserting rod and the inserting joint, a blocking end surface is formed at one end of the blocking part, an inserting channel is formed in the blocking part, the blocking part is sleeved in from one end, far away from the inserting joint, of the inserting rod, the inserting rod and the blocking part are inserted into the inserting cavity of the outer sleeve together, the other end of the blocking part is connected with the outer sleeve, the blocking end surface abuts against and is attached to the axial blocking surface in a pulled state, and the inserting and stopping function between the inserting rod and the blocking part is achieved;

(2) the stop piece is sleeved on the insertion rod before the insertion rod is inserted into the insertion cavity, so that the limitation that the sum of the maximum radius of the insertion head and the maximum wall thickness of the stop piece needs to be smaller than the radius of the insertion cavity in the prior art is avoided, and only the maximum radius R1 of the insertion head needs to be smaller than the radius R2 of the insertion cavity and larger than the radius R4 of the insertion channel, so that the maximum outer radius of the insertion head can be further increased, the area of the axial blocking surface can be increased, the area of the contact surface of the axial blocking surface and the end surface of the stop piece can be increased, the cross section area of the insertion neck can be increased, the stop piece is not easy to be damaged by pulling in the anti-pulling process, the insertion rod is not easy to be pulled off from the insertion neck, and the connection strength of the insertion thrust structure can be further improved.

(3) The stop part is sleeved on the insertion rod before the insertion rod is inserted into the insertion cavity, so that the problem that in the prior art, when the insertion rod is inserted into the insertion cavity, the insertion rod stretches the stop part to be in a gathering state again after the stop part is stretched, the stop part is prevented from changing in internal stress when the insertion rod is inserted, the stop part cannot be deformed after being stretched under the condition that the elastic performance of the stop part is insufficient, and the condition that connection fails is caused is avoided.

Drawings

Fig. 1 is a cross-sectional view of an insertion retaining structure according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an outer casing according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an insert rod according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a stopper in an embodiment of the present invention;

fig. 5 is a cross-sectional view of a stopper in an embodiment of the invention;

fig. 6 is a comparison graph of the contact surface area of the axial stopper surface and the stopper end surface, the minimum cross-sectional area of the collar, and the cross-sectional area of the stress rib in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a prefabricated component assembly according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the utility model discloses a grafting stopping structure, including outer cover 1, inserted bar 2 and stop part 3, wherein, outer cover 1 needs pre-buried in the concrete prefabricated component to a termination of stress muscle 4 that needs pre-buried in the concrete prefabricated component, stop part 3 overlaps in advance and establishes on inserted bar 2, inserts outer cover 2 and is connected stop part 3 and outer cover 1 back, makes inserted bar 2 can not deviate from outer cover 1, thereby realizes the grafting stopping function. Wherein the outer sleeve 1, the plunger 2 and the stop 3 are preferably located on the same central axis.

As shown in fig. 1 and 2, the outer sleeve 1 is a cylindrical nut, the outer peripheral surface of the main body part of the outer sleeve is a cylindrical outer surface, an insertion cavity 11 is formed in the outer periphery of the main body part of the outer sleeve, a reduced portion 12 is formed at the lower end of the insertion cavity 11, and the reduced portion 12 can be clamped with the stress bar 4 with an upset head at the end part so as to be connected with the stress bar 4 of the concrete prefabricated part. Of course, for the connection of the stress bar 4 in the concrete cast-in-place construction occasion, the outer sleeve 1 can be screwed or clamped at the end part of the stress bar 4.

As shown in fig. 1 and 3, the insertion rod 2 is in a shape of a revolving body, the lower end of the insertion rod 2 forms an insertion head 21 with a radially enlarged diameter that increases from the end surface to the rod body, a collar 22 is formed at a portion close to the insertion head 21, and an axial stop surface 23 is formed between the collar 22 and the insertion head 21.

As shown in fig. 1, 4 and 5, the stopper 3 is in the shape of a revolving body, one end of the stopper 3 is connected and fixed with the outer casing 1, the other end forms a stopping end face 31 of the reverse stopping axial stopping face 23 in the inserting cavity 11, and the stopper 3 is provided with a through inserting channel 32.

In the structure, one end of the insertion rod 2, which is far away from the plug connector 21, passes through the insertion channel 32 from the stop end face 31 of the stop member 3 as a starting position, so that the stop end face 31 is attached to the axial stop face 23, the stop member 3 stops the plug connector 21 of the insertion rod 2, the insertion rod 2 is inserted into the insertion cavity 11 of the outer sleeve 1, and the stop end face 31 of the stop member 3 extends into the insertion cavity 11, and then the stop member 3 is fixedly connected to the outer sleeve 1, so that the insertion and stopping functions are realized.

In the embodiment, since the stopper 3 is sleeved on the plunger 2 before the plunger 2 is inserted into the insertion cavity 11, the condition that the sum of the maximum radius R1 of the plug 21 and the maximum wall thickness H of the stopper 3 needs to be smaller than the radius R2 of the insertion cavity 11 in the prior art is avoided, so that only the maximum radius R1 of the plug 21 needs to be smaller than the radius R2 of the insertion cavity and larger than the radius R4 of the insertion channel (i.e. only the plug 21 needs to be ensured to be inserted into the insertion cavity 11 and the axial stopper surface 23 needs to be ensured to be capable of being attached to the stopper end surface 31), therefore, the maximum outer radius of the plug 21 can be further increased, the area of the axial stopper surface 23 can also be increased, the area of the contact surface between the axial stopper surface 23 and the stopper end surface 31 can be increased, and the cross-sectional area of the insertion neck 22 can be increased, so that the stopper 3 is not easily broken in the pulling-resistant process, the insertion rod 2 is not easily broken from the insertion neck 22, and the connection strength of the insertion thrust structure can be further improved.

Besides, still avoided among the prior art, when inserted bar 2 inserts grafting chamber 11, inserted bar 2 props back stop part 3 with stop part 3 and resumes to gather together the state again to avoid stop part 3 to change at the internal stress of inserted bar 2 when inserting, avoid under the not enough condition of elastic property of stop part 3, stop part 3 can't resume deformation after propping open, thereby lead to the condition of connection failure to take place.

Furthermore, one end of the stopper 3 connected to the outer casing 1 has a circular ring body 33, and the other end has two or more elastic pieces 34 spaced around the central axis of the circular ring body 33, the root of the elastic piece 34 is connected to one end of the circular ring body 33, and each elastic piece 34 gradually approaches the central axis of the circular ring body 33 in the direction from the circular ring body 33 to the elastic piece 34. The number of the elastic pieces 34 can be 2, 3, 4, 5, 6, etc., and relatively, the larger the number of the elastic pieces 34 is, the better the elasticity of the elastic pieces 34 is, but the pulling-resisting and backstopping-resisting force is weakened.

In the above structure, the torus 33 is used for being connected with the outer casing 1, when the elastic pieces 34 are circumferentially arranged at intervals so that the inserted bar 2 and the stop part 3 can be subjected to the anti-pulling action, the elastic pieces 34 can generate certain elastic deformation, the inserted bar 2 can move in the insertion cavity within a certain range, certain buffer space is provided for the elastic pieces 34 and the inserted bar 2, the elastic pieces 34 are prevented from being directly pulled apart by the inserted bar 2, and the elastic pieces 34 are gradually close to the central axis of the torus 33, so that the resilience trend of the elastic pieces 34 is larger, resilience can be easier, and after the stop part 3 is sleeved in the inserted bar 2, the gap between the stop part 3 and the inserted bar 2 is reduced. The connection mode between the ring body 33 and the outer sleeve body 1 can be threaded connection, an internal thread is arranged in the splicing cavity 11 of the outer sleeve body 1, an external thread matched with the internal thread is arranged on the outer wall of the ring body 33 to enable the outer sleeve body 1 and the ring body 33 to be in threaded connection, and when the inserted rod 2 is inserted into the outer sleeve body 1 again, the ring body 33 can be rapidly installed in the outer sleeve body 1. In the present embodiment, the number of the elastic pieces 23 is set to 6.

Furthermore, the wall thickness of the elastic sheet 34 is uniform or gradually reduced in the direction from the ring body 33 to the elastic sheet 34, and the sum of the minimum radius R1 of the plug neck 22 and the minimum wall thickness H of the elastic sheet 34 is larger than the minimum inner hole radius R2 of the ring body 33.

In the above structure, since the elastic piece 34 is always subjected to the bending force of the plug 21 to the elastic piece 34 during the retaining process, so that the elastic piece 34 always tends to bend toward the central axis, in order to reduce the bending force of the elastic piece 34, the bending degree of the elastic piece 34 needs to be reduced, that is, the stop end surface 31 moves in the direction away from the central axis, so that only by ensuring that at least part of the stop end surface 31 can be attached to the axial stop surface 23, as long as the sum of the minimum radius R3 of the plug 22 and the minimum wall thickness H of the elastic piece 34 is greater than the minimum inner hole radius R4 of the annular body 33, the bending degree of the elastic piece 34 can be reduced, and the reverse retaining effect can be achieved. Therefore, only the sum of the minimum radius R3 of the collar 22 and the minimum wall thickness H of the spring plate 34 needs to be greater than the maximum outer radius R1 of the plug 21, so that the stop end surface 31 always at least partially abuts against the axial stop surface 23 when the plunger 2 is retracted, and the bending degree of the spring plate 34 can be reduced.

When the stopper 3 is fitted into the plunger 2, a lubricating material such as grease is applied to a portion where the plunger 2 and the elastic piece 34 are in contact with each other to reduce the friction coefficient therebetween, thereby further reducing the frictional force and reducing the frictional damage between the elastic piece 34 and the plunger 2.

In addition, in order to enable the axial blocking surface 23 and the blocking end surface 31 to be well matched and have a better retaining effect, the angle value of the included angle α between the axial blocking surface 23 and the central axis is greater than or equal to 45 degrees and less than or equal to 90 degrees. If the angle value of the included angle α is greater than 90 ° and less than 180 °, when the axial stopper surface 23 is attached to the stopper end surface 31 and the insertion rod is subjected to a vertical upward pulling force, if the material property of the elastic piece 34 is insufficient, the elastic piece 34 is pulled to be spread by the insertion head 21 in the opposite direction, so that the retaining function fails, and when the material property of the elastic piece 34 is too high, the elastic piece 34 cannot be easily spread when the insertion head 21 is inserted, and a pressure to be applied is larger. If the angle value of the included angle α is greater than 0 ° and less than 45 °, the component force of the acting force of the plug 21 on the elastic piece 34 in the horizontal direction is greater, so that the elastic piece 34 is easier to bend. In the present embodiment, the angle α between the axial stop surface 23 and the central axis is 75 ° to 90 °.

In addition, as shown in fig. 6, in this embodiment, in order to enable the insertion and stopping structure to not only achieve the insertion and stopping function, but also meet the requirement that the connection strength during the connection of the precast concrete members meets the use requirement, that is, the insertion and stopping structure needs to ensure the anti-pulling function, even if the stressed rib 4 is pulled apart, the stop member 3 of the insertion and stopping structure is not pulled apart by the insertion rod 2 due to the excessive stress, and the contact area S1 between the stop end surface 31 and the axial stop surface 23 is larger than the cross-sectional area S2 of the stressed rib 4, so that under the condition that the materials of the insertion rod 2, the stop member 3 and the stressed rib 4 are the same, the maximum pulling resistance force that the insertion rod 2 and the stop member 3 can bear is larger than the maximum pulling resistance that the stressed rib 4 can bear before the breakage, and the insertion and stopping structure can meet the use requirement is ensured.

In order to further ensure the reliability of the connection strength of the insertion locking mechanism of the present embodiment, the insertion rod 2 is prevented from being pulled apart from between the collar 22 and the plug 21 when being subjected to a pulling force, and therefore the minimum cross-sectional area S3 of the collar 22 is larger than the cross-sectional area S2 of the rib 4.

Furthermore, in this embodiment, the end of the circular ring body 33 away from the elastic piece 34 is provided with a plurality of radial grooves 35 at intervals along the circumferential direction, and preferably, each radial groove 35 is evenly distributed along the circumferential direction of the circular ring body 33, and the radial grooves 35 are arranged to quickly screw the stop member 3 into the plug cavity 11 by an installation tool when the plug rod 3 is inserted into the outer sleeve 1.

In addition, the insertion stopping structure in this embodiment further includes a screw joint body 5, one end of the insertion rod 2 away from the insertion head 31 is a screw joint end 24 matched with the screw joint body 5, and the screw joint end 24 is screwed with a fastening nut 6. Wherein the bolt 5 is arranged on another prefabricated component and the bolt end 25 is used for connecting the bolt 5, i.e. the insert rod 2 is screwed on another prefabricated component. The fastening nut 6 is arranged on the bolt joint end 24 of the insert rod 2 after the stop part 3 is sleeved in the insert rod 2, so that the stop part 3 can be prevented from sliding out before the insert rod 2 is in bolt joint with the bolt joint body 5, and the situation that when the bolt joint end 24 is in bolt joint with the bolt joint body 5, the bolt joint end 24 is screwed into the bolt joint body 5 too much can be prevented, so that the threaded connection length of the stop part 3 and the outer sleeve body 1 is insufficient, and the annular body 33 of the stop part 3 cannot be screwed into the inserting cavity 11 completely.

In the actual installation process, the stop piece 3 is sleeved into the insert rod 2 in advance, the axial stop surface 23 is attached to the stop end surface 31, the fastening nut 6 is screwed into the screwing end 25 of the insert rod 2, the distance from the top of the screwing end 25 to the fastening nut 6 is adjusted during screwing, the distance is the depth that the screw-on end 24 needs to be screwed into the screw-on body 5, then the screw-on end 24 of the insert rod 2 is screwed into the screw-on body 5 until the screw-on body 5 touches the fastening nut 6, then the insert rod 2 is inserted into the outer casing 1, after the elastic end of the stop member 3 extends into the insertion cavity 11, the ring body 33 of the stop member 3 is screwed into the insertion cavity 11 until the ring body 33 completely extends into the insertion cavity 11, then the fastening nut 6 is rotated downwards to make the fastening nut fit with the end part of the outer sleeve, therefore, the stop piece 3 is locked in the plugging cavity 11, so that the connection of the whole plugging backstop structure is more stable and reliable.

As shown in fig. 7, in addition to the above-mentioned insertion stop structure, the prefabricated component assembly disclosed in the present invention comprises a first prefabricated component 7, a second prefabricated component 8 and the above-mentioned insertion stop structure, wherein the insertion stop structure is used for connecting the first prefabricated component 7 and the second prefabricated component 8, wherein the insertion rod 2, the stop member 3, the screw connector 5 and the fastening nut 6 of the insertion stop structure are disposed on the first prefabricated component 7, the screw connector 5 is pre-embedded in the first prefabricated component 7, the insertion rod 2 can be detachably connected to the screw connector 5 through the threaded end 25 after being sleeved with the stop member 3 and screwed into the fastening nut 6, the outer sleeve 1 and the stressed rib 4 of the insertion stop structure are disposed on the second prefabricated component 8, the outer sleeve 1 and the stressed rib 4 are pre-embedded in the second prefabricated component 8, the insertion cavity 11 of the outer sleeve 1 of the insertion rod 2 is screwed into the insertion cavity 11 of the outer sleeve 1, and then the stop member 3 is screwed into the insertion cavity 11 of the outer sleeve 1, the first prefabricated part 7 and the second prefabricated part 8 are firmly connected together through the clamping fit of the insert rod 2 and the stop part 3.

Under the service environment that has corrosivity to metal such as acid-base, in order to avoid the atress muscle 4 and the grafting stopping structure of two prefabricated components to rust 2 because of exposing, can be at the terminal surface coating epoxy that the prefabricated component is connected, simultaneously, at the overcoat 1 intussuseption be filled with epoxy, moreover, through filling epoxy, can further improve the resistance to plucking performance of this grafting stopping structure.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and decorations made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims (11)

1. Grafting stopping structure, its characterized in that includes:

the outer sleeve body (1) is fixedly connected to one end part of the stress rib (4) and is axially provided with an inserting cavity (11);

the plug rod (2) is provided with a plug neck (22) at the part close to the plug head (21), and an axial blocking surface (23) is formed between the plug neck (22) and the plug head (21); and

one end of the stop piece (3) is fixedly connected with the outer sleeve body (1), and the other end of the stop piece forms a stop end surface (31) of a reverse stop axial stop surface (23) in the plug-in cavity (11);

the stop piece (3) is provided with a plug channel (32) for the plug rod (2) to penetrate through, and the maximum radius R1 of the plug connector (21) is smaller than the radius R2 of the plug cavity (11) and larger than the radius R4 of the plug channel (32).

2. The plug-in type backstop structure according to claim 1, characterized in that one end of the stop member (3) connected with the outer sleeve body (1) is provided with a ring body (33), the other end is provided with more than two elastic sheets (34) which are distributed at intervals around the central axis of the ring body (33), the root parts of the elastic sheets (34) are connected with one end part of the ring body (33) into a whole, and in the direction from the ring body (33) to the elastic sheets (34), each elastic sheet (34) gradually approaches to the central axis of the ring body (33).

3. The plug-in retaining structure according to claim 2, characterized in that the wall thickness of the elastic sheet (34) is uniform or gradually reduced in the direction from the ring body (33) to the elastic sheet (34), and the sum of the minimum radius R3 of the plug neck (22) and the minimum wall thickness H of the elastic sheet (34) is larger than the minimum inner bore radius R4 of the ring body (33).

4. The plug-in anti-backup structure according to claim 1, characterized in that the axial stop face (23) forms an angle α with the central axis, the angle α having a value greater than or equal to 45 ° and less than or equal to 90 °.

5. The plug-in anti-backup structure according to claim 1, characterized in that the contact area S1 of the axial stop face (23) and the stop end face (31) is larger than the cross-sectional area S2 of the stress rib (4).

6. The plug-in backstop structure according to claim 1, characterized in that the smallest cross-sectional area S3 of said plug neck (22) is larger than the cross-sectional area S2 of a force-bearing rib (4).

7. The plug-in type backstop structure according to claim 2, characterized in that the plug-in cavity (11) of the outer sleeve body (1) is provided with an internal thread, and the outer wall of the ring body (33) is provided with an external thread matched with the internal thread so as to enable the outer sleeve body (1) to be in threaded connection with the ring body (33).

8. The plug-in backstop structure according to claim 2, characterized in that the end of the ring body (33) far away from the elastic sheet (34) is provided with a plurality of radial grooves (35) at intervals along the circumferential direction.

9. The plug-in backstop structure according to claim 8, characterized in that each radial groove (35) is evenly distributed along the circumferential direction of the ring body (33) at intervals.

10. The plugging backstop structure according to claim 1, characterized by further comprising a threaded connection body (5), wherein one end of the inserted bar (2) far away from the plug connector (21) is a threaded connection end (24) matched with the threaded connection body (5), and a fastening nut (6) is screwed on the threaded connection end (24).

11. Prefabricated component combination, including first prefabricated component (7) and second prefabricated component (8), characterized by: the first prefabricated part (7) and the second prefabricated part (8) are connected by a plug-in backstop structure according to any one of claims 1-10.

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