CN220977975U

CN220977975U - Joint connecting piece and prefabricated component combination

Info

Publication number: CN220977975U
Application number: CN202322290039.9U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Hejian Building Materials Co ltd
Current assignee: Zhejiang Hejian Building Materials Co ltd
Priority date: 2023-08-24
Filing date: 2023-08-24
Publication date: 2024-05-17
Anticipated expiration: 2033-08-24

Abstract

The utility model relates to the field of connection of prefabricated components, and discloses a clamping connection piece and a prefabricated component combination, wherein the clamping connection piece comprises a inserted bar, a connection sleeve, a clamping ring and an elastic piece, the inserted bar is provided with an inverted conical insertion section, a first clamping tooth group is arranged along the axial direction of the inserted bar, an inverted conical inner wall surface is formed at a preset position of the connection sleeve, the clamping ring is provided with a plurality of arc clamping flaps which are annularly arranged and can slide along the inverted conical inner wall surface to be scattered, the elastic piece is arranged in the connection sleeve and pushes the clamping ring against the inverted conical inner wall surface, the conical inner wall of the arc clamping flaps is provided with a second clamping tooth group which is matched with the first clamping tooth group, an outer wall revolution contour bus of the arc clamping flaps comprises a straight line section and an inclined line section, the axial length L1 of the straight line section is larger than the axial length L2 of the inclined line section, the clamping ring has good erectability, the arc clamping flaps are prevented from falling down to cause insertion failure or only partial arc clamping flaps are stressed to cause small drawing resistance, and the clamping ring and the clamping bar is in wedge tight fit and firm clamping is ensured through clamping teeth.

Description

Joint connecting piece and prefabricated component combination

Technical Field

The utility model relates to the field of prefabricated part connection, in particular to a clamping connection piece and prefabricated part combination.

Background

Pile extension is an important ring in the construction process of precast piles, the pile extension quality directly influences the bearing capacity of piles and the settlement of upper structures, and in order to improve the pile extension efficiency and reliability, a pile extension method is usually adopted to have mechanical connecting pieces for pile extension. The prior art discloses a mechanical connecting piece for pile extension comprises a large nut, a small nut, a middle nut, a inserted link, a clamping ring and a spring, wherein the large nut and the small nut are respectively embedded in the end faces of two precast piles to be abutted, the middle nut, the clamping ring and the spring are sequentially arranged in the large nut along the insertion direction of the inserted link, the middle nut is in threaded connection with the large nut, the clamping ring is formed by a plurality of arc-shaped clamping pieces spliced into a ring shape, the clamping ring is provided with a conical section matched with the inner conical surface of the middle nut, and the inserting section of the inserted link is provided with a clamping surface formed by the inner wall of the clamping ring. Because the axial length of the conical section inclined in the clamping ring occupies the whole axial length of the clamping ring in an oversized proportion, the gravity center of the arc-shaped clamping piece deviates greatly from the central axis direction of the clamping ring, and the arc-shaped clamping piece is easy to incline to the central axis direction to cause plugging failure or only part of the arc-shaped clamping piece is clamped with the plugging rod when the inserting force of the plugging rod is received, so that the plugging reliability of the mechanical connecting piece is reduced.

Disclosure of utility model

In order to solve the technical problems, the utility model provides the clamping connection piece with high plugging reliability.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a clamping connection piece, which comprises a plunger rod, wherein an inverted cone-shaped insertion section of the plunger rod is provided with a first latch group along the axial direction; a connecting sleeve, which is formed with an inverted cone inner wall surface at a preset position from the cylinder bottom; the clamping ring is provided with a plurality of arc clamping petals which are annularly arranged and can slide along the inverted conical inner wall surface to gather and scatter; the elastic piece is arranged in the connecting sleeve and pushes the clamping ring against the inverted conical inner wall surface; the conical inner wall of the arc-shaped clamping valve is provided with a second clamping tooth group which is matched with the first clamping tooth group, the outer wall revolution contour generating line of the arc-shaped clamping valve comprises a straight line segment and an oblique line segment, and the axial length L1 of the straight line segment is greater than the axial length L2 of the oblique line segment.

Further, the first latch group comprises a plurality of first latches which are axially arranged, and the first latch closest to the root of the plug section is spaced from the root of the plug section by a preset length.

Further, the predetermined length is greater than the tooth height of the first latch.

Further, an included angle theta between the inclined line segment and the central axis of the clamping ring is larger than 16 degrees; and/or the cone angle a1 of the inserting section is smaller than 8 degrees, the cone angle a2 of the conical inner wall of the arc-shaped clamping valve is smaller than 8 degrees, and a2 is smaller than or equal to a1.

Further, the inserted link includes with the screw thread end of grafting section root connection and with the guide head of grafting section head connection, the cross section outline size of guide head is from the screw thread end to the grafting section gradually reduces.

Further, the second latch group comprises a plurality of second latches which are axially arranged, the second latches comprise two tooth surfaces positioned at two sides of the tooth top, and the included angles formed by the two tooth surfaces and a horizontal line are a3 and a4 respectively, wherein a 0 degree is more than 3 and less than 80 degrees, a 0 degree is more than 4 and less than 50 degrees, and a3 is more than a4; and/or the tooth height of the second latch gradually increases along the insertion direction of the inserted link; and/or the tooth thickness of the second latch gradually increases along the insertion direction of the inserted link.

Further, the connecting sleeve comprises a main cylinder body and an auxiliary cylinder body arranged on the main cylinder body; the main cylinder body is in threaded connection with the auxiliary cylinder body, and the inverted cone-shaped inner wall surface is arranged on the auxiliary cylinder body.

Further, a cylindrical limiting cavity is arranged at the bottom of the auxiliary cylinder body, and the top wall of the limiting cavity is connected with the bottom end of the inverted cone-shaped inner wall surface.

Further, the clamping ring is provided with a conical table which is abutted against the reverse conical inner wall surface and is clamped with the inserting section, and the surface hardness of the conical table is larger than that of other parts of the clamping ring except the conical table.

Compared with the prior art, the utility model has the following beneficial effects:

The inserted link has the grafting section of falling the cone, the grafting section sets up first latch group along the axial, the toper inner wall of arc clamping lamella is provided with the second latch group of the first latch group of adaptation, and the outer wall gyration profile generating line of arc clamping lamella contains straightway and slash section, the axial length L1 of straightway is greater than the axial length L2 of slash section, make the snap ring have better erectiveness, prevent that the arc clamping lamella from taking place to empty when receiving the insertion force of inserted link and leading to the grafting failure or only partial arc clamping lamella atress leads to the problem that the anti pulling force is little, the first latch group of the toper inner wall of arc clamping lamella and the second latch group joint of the grafting section of falling the cone, make snap ring and inserted link be conical wedge fit and through the latch joint, avoid the arc clamping lamella to slide axially between the inner wall of falling the cone and grafting section, guarantee the reliability and the fastness of joint, avoid the pile terminal surface to produce the clearance simultaneously, improve the durability.

The utility model also provides a prefabricated component combination, which comprises at least two prefabricated components, wherein the two prefabricated components are butted by adopting the clamping connecting piece, and the prefabricated components have the same beneficial effects as the clamping connecting piece.

Drawings

FIG. 1 is a schematic view of a clip connection according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a plunger according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a snap ring according to an embodiment of the present utility model;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a schematic view of a secondary barrel according to an embodiment of the present utility model;

FIG. 6 is a schematic view of another coupling sleeve according to an embodiment of the present utility model;

Fig. 7 is a schematic view of a prefabricated component assembly according to an embodiment of the utility model.

In the accompanying drawings: a plunger 1; a plug section 11; a first latch 12; a threaded end 13; a guide head 14; a connecting sleeve 2; a main cylinder 2a; a sub cylinder 2b; an inverted conical inner wall surface 21; a spacing cavity 22; a guide chamber 23; a main rib fixing hole 24; a clasp 3; arc-shaped clamping flaps 3a; a second latch 31; tooth surface 311; a straight line segment 32; a diagonal segment 33; a conical table 34; an elastic member 4; a nut sleeve 5; prefabricated elements 100, main bars 101.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

In the present specification, the terms "upper, lower, inner, outer" and the like are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may be changed according to the drawings, so that the terms are not to be construed as absolute limitation of the protection scope; 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.

As shown in fig. 1-6, the utility model provides a clamping connection piece, which comprises a plug rod 1, a connecting sleeve 2, a clamping ring 3 and an elastic piece 4, wherein the clamping ring 3 and the elastic piece 4 are arranged in the connecting sleeve 2, the plug rod 1 comprises an inverted cone-shaped plug section 11, the external cross section outline dimension of the plug section 11 gradually increases from the cylinder mouth of the connecting sleeve 2 to the cylinder bottom (also the inserting direction of the plug rod 1), the plug section 11 is axially provided with a first clamping tooth group, the connecting sleeve 2 is formed with an inverted cone-shaped inner wall surface 21 at a preset position from the cylinder bottom, the diameter of the inverted cone-shaped inner wall surface 21 gradually increases from the cylinder mouth to the cylinder bottom, the clamping ring 3 is provided with a plurality of arc clamping flaps 3a which are annularly arranged and can slide along the inverted cone-shaped inner wall surface 21 to be scattered, the elastic piece 4 is arranged in the connecting sleeve 2 and pushes the clamping ring 3 towards the inverted cone-shaped inner wall surface 21, wherein the conical inner wall of the arc clamping flaps 3a is provided with a second clamping tooth group which is matched with the first clamping tooth group, the external wall rotation outline of the arc clamping flaps 3a comprises a straight line section 32 and a oblique line section 33, and the length of the straight line section 32 is greater than the axial length of the axial section 2L 1.

Because the axial length L2 of the straight line section 32 of the outer wall of the arc-shaped clamping piece 3a is greater than the axial length L1 of the oblique line section 33, the clamping ring 3 has better erectability, the anti-overturning capability of the clamping ring is improved, when the arc-shaped clamping piece 3a is subjected to the insertion force of the inserting rod 1, the arc-shaped clamping piece 3a is not easy to incline, the problem that the insertion failure is caused due to the incline of the arc-shaped clamping piece 3a or the anti-drawing force is small due to the stress of only part of the arc-shaped clamping piece 3a is prevented, the clamping connection between the arc-shaped clamping pieces 3a and the inserting rod 1 is ensured, and the anti-drawing performance is improved. Moreover, the first latch group of the conical inner wall of the arc-shaped clamp valve 3a is clamped with the second latch group of the inverted conical inserting section 11, so that the clamp ring 3 and the inserting rod 1 are in conical wedge fit and are clamped through the clamp teeth, the clamp ring 3 and the inserting section 11 are firmly clamped, the arc-shaped clamp valve 3a is prevented from axially sliding between the inverted conical inner wall surface 21 and the inserting section 11, the reliability and the firmness of the clamping are guaranteed, meanwhile, the pile splicing end face is prevented from generating a gap, and the durability is improved.

As shown in fig. 2, further, the first latch group includes a plurality of first latches 12 arranged in an axial direction, and the first latch 12 closest to the root of the plugging section 11 is a predetermined length L3 from the root of the plugging section 11. The problem that the part of the inserted link 1, which is close to the root of the inserting section 11, is grooved to form the first latch 12 to reduce the strength is avoided, and the strength of the inserted link 1 is ensured to meet the requirement of reliable clamping. Preferably, the predetermined length L3 is greater than the tooth height of the first latch 12, in other embodiments, the predetermined length L3 may be greater than the tooth thickness of the first latch 12, and of course, the predetermined length L3 may be other values that satisfy the root position strength of the plugging section 11, which is not limited in particular.

Further, as shown in fig. 3, the included angle θ between the oblique line segment 33 and the central axis o ₁ of the snap ring 3 is greater than 16 °, so as to ensure the contact strength between the snap ring 3 and the inverted cone inner wall 21, and facilitate the stability of the clamping connection between the insert rod 1 and the snap ring 3.

Further, as shown in fig. 2 and 3, the taper angle a1 of the plugging section 11 is smaller than 8 °, the taper angle a2 of the tapered inner wall of the arc-shaped clamping piece 3a is smaller than 8 °, and a2 is smaller than or equal to a1, so that the inward inclination amplitude of the arc-shaped clamping piece 3a can be reduced, the gravity center of the clamping ring 3 is stable, the gravity center of the clamping ring 3 radially tends to be close to the central axis o ₁ of the clamping ring 3, meanwhile, a larger contact area between the plugging section 11 and the arc-shaped clamping piece 3a is ensured, the clamping stability is improved, and the self-locking function of the clamping connection piece is enhanced.

Further, as shown in fig. 1 and 3, the top of the snap ring 3 is provided with a conical table 34 which abuts against the inverted conical inner wall surface 21 and is clamped with the plugging section 11, an inclined line section 33 is formed by an outer wall revolution contour bus of the conical table 34, and when the plugging section 11 is inserted into the snap ring 3, the snap ring 3 can press the elastic piece 4 to deform so that the conical table 34 slides along the inverted conical inner wall surface 21. When the plug section 11 is inserted into the connecting sleeve 2 to a predetermined depth, the first latch set and the second latch set form a latch. The taper angle of the outer wall surface of the taper stage 34 is preferably equal to the taper angle of the back taper inner wall surface 21, but of course, the taper angle of the outer wall surface of the taper stage 34 may be slightly smaller or slightly larger than the taper angle of the back taper inner wall surface 21, and is specifically selected according to actual needs. The surface hardness of the taper table 34 is greater than the hardness of the snap ring 3 at other portions than the taper table 34. After the clamping connection piece is inserted, the conical table 34 of the clamping ring 3 is wedged between the inverted conical inner wall surface 21 of the connecting sleeve 2 and the inserting section 11 to form a stable clamping structure, the surface hardness of the conical table 34 is high, the connection strength is effectively improved, and the anti-pulling performance of the clamping connection piece is further improved. The taper table 34 may be heat treated to increase its hardness, although other means of achieving this effect are possible.

Further, the number of the arc-shaped clamping petals 3a can be two, three, four or more than four, and the specific number is selected according to actual needs. The outer wall or the inner wall of each arc-shaped clamping flap 3a is provided with an arc-shaped groove (not shown), when each arc-shaped clamping flap 3a is spliced into a ring shape along the radial direction, the tops of each arc-shaped clamping flap 3a are spliced to form a conical table 34, the arc-shaped grooves are mutually connected into a ring groove, and an elastic fastener is arranged in the ring groove, so that the whole clamping ring 3 has elasticity and can be expanded or contracted along the radial direction, and the clamping stability of the clamping ring 3 and the inserting rod 2 is improved. The outer wall and/or the inner wall of the arc-shaped clamping flap 3a are/is provided with a strength weakening groove (not shown), the cross section shape of the strength weakening groove is not limited, and the cross section shape of the strength weakening groove can be arc-shaped or polygonal or irregular, so that the clamping ring 3 can be more easily opened and contracted radially under the action of external force.

Further, as shown in fig. 1 and 2, the plug rod 1 includes a threaded end 13 connected to the root of the plug section 11 and a guide head 14 connected to the head of the plug section 11, and the cross-sectional outer contour dimension of the guide head 14 gradually decreases from the threaded end 13 toward the plug section 11. The head of the plugging section 11 is provided with a guide head 14 which facilitates the plugging rod 1 to enter the clamping ring 3. In this embodiment, the clamping connection piece further includes a nut sleeve 5, one end of the nut sleeve 5 is provided with a main rib fixing hole 24 for connecting the main rib 101, and the other end of the nut sleeve 5 is screwed with the threaded end 13. In other embodiments, the nut sleeve 5 may be omitted, and the tail of the insert rod 1 may be integrally formed with the main rib 101 of the prefabricated member 100 or fixedly connected by welding, clamping, screwing, or the like.

Further, as shown in fig. 3 and 4, the second tooth group includes a plurality of second teeth 31 arranged axially, the second teeth 31 include tooth surfaces 311 located at two sides of their tooth tops, and angles formed by the two side tooth surfaces 311 and a horizontal line o ₂ are a3 and a4, respectively, where the horizontal line o ₂ is perpendicular to a central axis o ₁ of the snap ring 3, 0 ° < a3 < 80 °,0 ° < a4 < 50 °, and a3 > a4, that is, the shape of the second teeth 31 is a non-isosceles trapezoid or a non-isosceles triangle. This tooth design allows the second latch 31 to be smoothly inserted between the two first latches 12 to withstand greater pulling forces. Preferably, the tooth height of the second latch 31 is 0.02mm-2mm, and the tooth thickness of the second latch 31 is 0.03mm-3mm, so as to meet the requirement of the connection strength of the snap ring 3 and the inserted link 1. It will be appreciated by those skilled in the art that the particular size, shape, etc. of the first latch 12 and the second latch 31 may not be limited so long as they are capable of mating with each other.

Further, the tooth height of the second latch 31 gradually increases along the insertion direction of the insert rod 1, and the tooth height is the difference between the tooth top and the adjacent tooth bottom in the radial direction of the insert rod 1, so that the insert rod 1 is not easy to pull out. The tooth thickness of the second latch 31 gradually increases along the insertion direction of the inserted link 1, the tooth thickness refers to the axial length of the first latch 12, connection between the arc-shaped clamping valve 3a and the inserting section 11 is reliable, the first latch 12 and the second latch 31 are meshed more fully, and further reliable clamping connection between the clamping ring 3 and the inserted link 1 is guaranteed.

Further, as shown in fig. 1 and 5, the connecting sleeve 2 may be a split structure, and in this embodiment, the connecting sleeve 2 includes a main cylinder 2a and a sub cylinder 2b mounted on the main cylinder 2a, and the inverted cone inner wall surface 21 is provided on the sub cylinder 2b. The main cylinder body 2a and the auxiliary cylinder body 2b can be connected and fixed in a threaded connection, clamping connection, welding, pin joint, bonding and other modes. In the present embodiment, the main cylinder 2a and the sub cylinder 2b are screwed. The bottom of the main cylinder 2a is provided with a main rib fixing hole 24 for fixing the main rib 101 in the prefabricated component 100, the main rib 101 can be a steel rod with an upsetting head at the end, a threaded steel, a steel strand, a glass fiber reinforced plastic or the like, the main rib fixing hole 24 can be a clamping table clamped with the upsetting head of the steel rod, or a threaded hole connected with the threaded steel, or a conical hole for connecting the steel strand, an anchor is arranged in the conical hole to fix the steel strand in the conical hole, the type of the main rib 101 and the structure of the main rib fixing hole 24 are selected according to actual needs, the method is not limited to the above-listed modes, correspondingly, the assembling process of the clamping connecting piece is also adaptively adjusted, and the minimum requirement is that the assembly is complete.

Further, as shown in fig. 1 and 5, a cylindrical limiting cavity 22 is provided at the bottom of the sub cylinder 2b, and the top wall of the limiting cavity 22 is connected to the bottom end of the inverted cone-shaped inner wall surface 21. The limiting cavity 22 is arranged to limit the clamping ring 3 to a limiting position far away from the side of the inverted conical inner wall surface 21, so that the clamping connection piece has a self-locking function, and the outward expansion force on the bottom of the auxiliary cylinder body 2b is reduced. The top of the auxiliary cylinder body 2b is also provided with a conical guide cavity 23, and the diameter of the guide cavity 23 gradually decreases from the cylinder mouth to the cylinder bottom, thereby facilitating the insertion of the inserted link 1.

As shown in fig. 6, of course, the connecting sleeve 2 may be integrally formed, that is, the main cylinder 2a and the sub cylinder 2b may be integrally formed, and the step of installing the sub cylinder 2b in the later stage may be omitted. In order to facilitate the installation of the snap ring 3 and the elastic piece 4 into the connecting sleeve 2 from the bottom of the cylinder, the main rib fixing hole 24 is a threaded hole connected with the threaded steel or a threaded hole in threaded connection with the nut and the steel bar with the upsetting head assembled into an integral structure, wherein the upsetting head of the steel bar and the nut are clamped into an integral structure, and then the nut is installed into the threaded hole, and of course, other modes besides the above can be adopted to connect the connecting sleeve 2 with the main rib 101. Similarly, the type of the main rib 101 and the structure of the main rib fixing hole 24 are selected according to actual needs, and are not limited to the above-listed modes, and accordingly, the assembling process of the clamping connection member is also adaptively adjusted, and the minimum requirement is that the assembly is complete.

The elastic member 4 may be a cylindrical elastic body made of an elastic material (such as rubber, silica gel, etc.), or may be a common spring, an elastic ball, an elastic block, an elastic strip, etc., in addition, the elastic member 4 may include an elastic element and a spacer disposed at one end of the elastic element near the snap ring 3, the snap ring 3 is pressed on the spacer, and the spacer is disposed to support the snap ring 3, specifically, the elastic element may be a spring, an elastic ball, an elastic block, an elastic strip, a cylindrical elastic body, etc., as long as the elastic element can realize a corresponding function, and is not limited to the above-listed types.

As shown in fig. 7, the present utility model also provides a prefabricated component assembly, which includes at least two prefabricated components 100, and the two prefabricated components 100 are abutted by the above-mentioned clamping connection. The two prefabricated components 100 which are in butt joint can be the same type of prefabricated components, such as one of prefabricated piles, prefabricated columns, prefabricated walls, prefabricated beams and prefabricated plates, or two different types of prefabricated components, such as one prefabricated component 100 is a prefabricated pile, the other prefabricated component 100 is a prefabricated bearing platform or other types of building components such as a prefabricated plate, one end part of at least part of main ribs 101 in the two prefabricated components 100 in butt joint is fixedly connected with a connecting sleeve 2, one end part of at least part of main ribs 101 in the other prefabricated components 100 is connected with a inserted link 1, a clamping ring 3 and an elastic piece 4 are arranged in the connecting sleeve 2, and a first clamping tooth group of the inserted link 11 and a second clamping tooth group of the clamping ring 3 form clamping connection, so that the two prefabricated components 100 are reliably connected. As shown in fig. 7, when the clamping connection member is used for connecting two adjacent precast piles, the main rib 101 and the insert rod 1 can be connected through the nut sleeve 5, and the connection sleeve 2 and the nut sleeve 5 can be pre-buried in the precast member 100. In other embodiments, when the clamping connection member is used for connecting an assembled building, the connection sleeve 2 and the nut sleeve 5 are completely located outside the prefabricated part 100, and are fixedly connected with one end of the corresponding main rib 101 extending out of the prefabricated part 100, and the fixing manner is specifically selected according to the actual connection requirement, which is not limited herein. In addition, besides the connection between the main rib 101 and the insert rod 1 through the nut sleeve 5, the main rib 101 and the insert rod 1 may be integrally formed, that is, the main rib 101 extends out of one end of the prefabricated part 100 to integrally form the insert rod 1, or the main rib 101 and the insert rod 1 are connected and fixed through a clamping, a screw, a welding or other manner, and specifically, the insert rod is selected according to practical requirements.

The clamping connection and the prefabricated component combination provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. The card connecting piece, its characterized in that includes:

The inverted cone-shaped inserting section of the inserting rod is provided with a first latch group along the axial direction;

a connecting sleeve, which is formed with an inverted cone inner wall surface at a preset position from the cylinder bottom;

The clamping ring is provided with a plurality of arc clamping petals which are annularly arranged and can slide along the inverted conical inner wall surface to gather and scatter;

The elastic piece is arranged in the connecting sleeve and pushes the clamping ring against the inverted conical inner wall surface;

The conical inner wall of the arc-shaped clamping valve is provided with a second clamping tooth group which is matched with the first clamping tooth group, the outer wall revolution contour generating line of the arc-shaped clamping valve comprises a straight line segment and an oblique line segment, and the axial length L1 of the straight line segment is greater than the axial length L2 of the oblique line segment.

2. The snap connection of claim 1, wherein the first set of teeth comprises a plurality of first teeth arranged axially, the first teeth closest to the root of the plug section being a predetermined length from the root of the plug section.

3. The snap connection of claim 2 wherein the predetermined length is greater than the tooth height of the first latch.

4. The snap connection of claim 1, wherein an included angle θ of the diagonal segment to the central axis of the snap ring is >16 °;

And/or the cone angle a1 of the inserting section is smaller than 8 degrees, the cone angle a2 of the conical inner wall of the arc-shaped clamping valve is smaller than 8 degrees, and a2 is smaller than or equal to a1.

5. The snap-in connector of claim 1, wherein the spigot includes a threaded end connected to the root of the spigot and a pilot head connected to the head of the spigot, the pilot head having a cross-sectional profile that tapers from the threaded end to the spigot.

6. The joint connector of claim 1, wherein the second latch set comprises a plurality of second latches axially arranged, the second latches comprise two tooth surfaces positioned at two sides of a tooth top of the second latches, and included angles formed by the two tooth surfaces and a horizontal line are respectively a3 and a4, wherein 0 ° < a3 < 80 °,0 ° < a4 < 50 °, and a3> a4;

And/or the tooth height of the second latch gradually increases along the insertion direction of the inserted link;

and/or the tooth thickness of the second latch gradually increases along the insertion direction of the inserted link.

7. The snap connection of claim 1 wherein the connection sleeve comprises a main barrel and a secondary barrel mounted to the main barrel;

The main cylinder body is in threaded connection with the auxiliary cylinder body, and the inverted cone-shaped inner wall surface is arranged on the auxiliary cylinder body.

8. The snap connection of claim 7, wherein the bottom of the secondary barrel is provided with a cylindrical spacing cavity, and the top wall of the spacing cavity is connected with the bottom end of the inverted cone inner wall surface.

9. The snap connection of claim 1, wherein the snap ring has a tapered land that abuts the reverse tapered inner wall surface and snaps with the mating segment, the tapered land having a surface hardness that is greater than a hardness of a portion of the snap ring other than the tapered land.

10. A prefabricated component combination, comprising at least two prefabricated components, wherein two of said prefabricated components are butted using a snap connection according to any one of claims 1-9.