A dual bell and spigot concrete precast connector

Abstract

The utility model discloses a kind of double socket concrete precast connector, it is related to engineering pile connecting technical field, to solve the technical problem that the existing connection mode can be difficult to provide sustained, stable locking force, there is the potential risk of connection loosening. Its technical scheme main point is: including upper embedded part and lower embedded part, the upper embedded part and lower embedded part are open structure, the upper embedded part is connected with bush, the bush is provided with inclined taper surface, the inclined taper surface movably connects with several fixed bars, the fixed bar is elastically connected with spring steel in its circumferential side, the spring steel is arranged in the upper embedded part, the inner wall of the fixed bar is connected with plug-in element, the plug-in element is connected in lower embedded part with screw thread. The utility model aims at providing a kind of double socket concrete precast connector.

Description

Technical Field

[0001] This utility model relates to engineering pile connections, and more specifically, it relates to a double-socket precast concrete connector. Background Technology

[0002] China's pipe pile industry started in 1987. After more than a decade of development, it now has over 260 pipe pile manufacturing enterprises nationwide. The industry has experienced rapid growth in recent years. Currently, domestic pipe piles are mainly used in various high-rise buildings under 60 stories, as well as low-pile foundations for industrial and civil buildings, and in foundation construction for railways, highways, bridges, ports, docks, water conservancy projects, municipal works, structures, and large equipment. The real estate sector accounts for approximately 80% of these applications, while highways and railways account for about 15%, with an annual demand reaching hundreds of millions of meters.

[0003] Chinese Patent Announcement CN105672308B discloses a double-socket precast concrete connector, the key technical features of which are: a large nut and a small nut; the large nut has a bushing and a locking device inside; the small nut has a snap-fit ​​pin; the lower part of the snap-fit ​​pin is hollow and has several stepped bends evenly arranged circumferentially; the stepped surfaces of the bends mate with the lower end face of the bushing; the locking device engages with the inner wall of the bends. The bushing is threaded to the large nut, and the snap-fit ​​pin is threaded to the small nut. After the snap-fit ​​pin is inserted into the bushing, it can automatically tighten and lock, thus connecting as a whole.

[0004] This solution achieves a quick connection by inserting a snap-fit ​​pin into the bushing and locking it in place. However, the anti-loosening capability of this structure mainly relies on the engagement between the locking device and the inner wall of the snap-fit ​​device, as well as the preload of the threaded connection. When the pipe pile is subjected to strong vibration or impact loads, this connection method may struggle to provide a continuous and stable locking force, posing a potential risk of loosening.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-socket precast concrete connector.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a double-socket precast concrete connector, comprising an upper embedded part and a lower embedded part, both of which are open structures. The upper embedded part is threadedly connected to a bushing, and the bushing is provided with an inclined conical surface. The inclined conical surface is movably connected to a plurality of fixed bends, and the periphery of the fixed bends is elastically connected to spring steel, which is disposed within the upper embedded part. The inner wall of the fixed bends is threadedly connected to a snap-fit ​​element, which is threadedly connected to the lower embedded part.

[0008] By adopting the above technical solution: during the installation process, the spring steel is first placed into the upper embedded part, and then several fixing wrenches are placed into the bushing. The fixing wrenches can be stably installed through the inclined conical surface inside the bushing, making it less likely to fall off. The bushing is installed in the upper embedded part, and the snap-fit ​​element is installed in the lower embedded part to complete the initial installation, which can avoid falling off and damage during transportation.

[0009] The present invention is further configured such that: the buckle element includes a buckle pin, the bottom of the buckle pin is fixedly connected to a receiving block, the bottom of the receiving block is fixedly connected to a buckle post, and the inner wall of the fixing bend is provided with a buckle groove for the buckle pin to be threaded and fixed.

[0010] The present invention is further configured such that: the inner walls of the upper embedded part and the lower embedded part are respectively provided with an upper threaded end and a lower threaded end, the upper threaded end and the lower threaded end are respectively connected to the buckle post of the bushing and the buckle element, and a vertical space is formed between the upper threaded end and the bottom of the upper embedded part and between the lower threaded end and the top of the lower embedded part.

[0011] The present invention is further configured such that: a movable spring is provided inside the upper embedded part, one end of the movable spring abuts against the inner wall of the upper embedded part, and the other end abuts against a connecting ring, the connecting ring being fixedly connected to the spring steel.

[0012] The present invention is further configured such that: the bottom of the spring steel abuts against a plurality of fixed bends, and a horizontal space is formed between the top of the fixed bends and the top of the spring steel.

[0013] The present invention is further configured such that a hexagonal groove is provided at the top of the snap pin and at the bottom of the snap post.

[0014] The present invention is further configured such that: both the top of the upper embedded part and the bottom of the lower embedded part are provided with reinforcing bar insertion holes.

[0015] The present invention has the following beneficial effects: 1. During the initial installation, the spring steel, fixing bend, bushing, buckle element, etc. are installed in sequence, which can avoid the parts falling off and being damaged during transportation, and prepare for subsequent construction.

[0016] 2. During the connection of two concrete piles, the snap-fit ​​element of the lower embedded part is inserted into the fixing shank of the upper embedded part, pushing the fixing shank to move along the inclined cone surface and separate from each other. At the same time, the spring steel always abuts against the fixing shank. Under the guidance of the inclined cone surface, the fixing shank can maintain horizontal locking when it rises or falls, which enhances the connection strength between the upper and lower embedded parts.

[0017] 3. The vertical space formed within the upper and lower embedded parts can accommodate the socket block, providing travel space for the locking action; the horizontal space formed by the spring steel and the top of the fixed bend provides displacement space for the rising and falling of the fixed bend. Attached Figure Description

[0018] Figure 1 This is an exploded view of this embodiment;

[0019] Figure 2 This is an exploded view from another perspective of this embodiment;

[0020] Figure 3 This is a partial sectional view of this embodiment;

[0021] Figure 4 This is a partial sectional view of the bushing, fixing bend, spring steel, and snap fastener in this embodiment.

[0022] Figure descriptions: 1. Upper embedded part; 2. Lower embedded part; 3. Bushing; 4. Inclined conical surface; 5. Fixing bend; 6. Spring steel; 7. Plug element; 71. Plug pin; 72. Socket block; 73. Plug post; 74. Plug groove; 8. Upper threaded end; 9. Lower threaded end; 10. Vertical space; 11. Movable spring; 12. Connecting ring; 13. Horizontal space; 14. Hexagonal groove; 15. Rebar insertion hole. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0025] As shown in the figure, a double-socket precast concrete connector includes an upper embedded part 1 and a lower embedded part 2. Both the upper embedded part 1 and the lower embedded part 2 are open structures. The upper embedded part 1 is threadedly connected to a bushing 3. An inclined conical surface 4 is provided inside the bushing 3. Several fixing bends 5 are movably connected to the inclined conical surface 4. Spring steel 6 is elastically connected to the periphery of the fixing bends 5. The spring steel 6 is provided inside the upper embedded part 1. A snap-fit ​​element 7 is threadedly connected to the inner wall of the fixing bends 5. The snap-fit ​​element 7 is threadedly connected to the lower embedded part 2.

[0026] During installation, the spring steel 6 is first placed into the upper embedded part 1, and then several fixing bends 5 are placed into the bushing 3. The inclined conical surface 4 inside the bushing 3 ensures that the fixing bends 5 can be stably installed and are not prone to falling off. The bushing 3 is installed into the upper embedded part 1, and the snap-fit ​​element 7 is installed into the lower embedded part 2. This completes the initial installation and can prevent falling off and damage during transportation. During the pile driving process, the concrete pile with the lower embedded part 2 is first erected and fixed. Then, the concrete pile with the upper embedded part 1 is aligned with the lower embedded part 2 using lifting equipment, and the upper embedded part 1 is lowered so that the upper concrete pile... The lower end face of the component is attached to the upper end face of the concrete pile below. During the process of connecting the two concrete piles, the snap-fit ​​element 7 in the lower embedded part 2 is gradually inserted into several fixing bends 5 in the upper embedded part 1. The snap-fit ​​element 7 pushes the fixing bends 5 to move along the inclined cone surface 4 of the bushing 3. Under the force of the snap-fit ​​element 7, the several fixing bends 5 separate from each other, and the snap-fit ​​element 7 can be inserted smoothly. During the insertion of the snap-fit ​​element 7, the spring steel 6 always abuts against the several fixing bends 5. The several fixing bends 5 rise or fall under the guidance of the inclined cone surface 4, which can maintain a continuous radial clamping force on the fixing bends 5.

[0027] The snap-fit ​​element 7 includes a snap-fit ​​pin 71, a receiving block 72 is fixedly connected to the bottom of the snap-fit ​​pin 71, and a snap-fit ​​post 73 is fixedly connected to the bottom of the receiving block 72. The inner wall of the fixing bend 5 is provided with a snap-fit ​​groove 74 for the snap-fit ​​pin 71 to be threaded. The inner walls of the upper embedded part 1 and the lower embedded part 2 are respectively provided with an upper threaded end 8 and a lower threaded end 9. The upper threaded end 8 and the lower threaded end 9 are respectively connected to the bushing 3 and the snap-fit ​​post 73 of the snap-fit ​​element 7. Vertical spaces 10 are formed between the upper threaded end 8 and the bottom of the upper embedded part 1 and between the lower threaded end 9 and the top of the lower embedded part 2.

[0028] The outer wall of the snap-fit ​​pin 71 is threaded for screwing into the snap-fit ​​groove 74 on the inner wall of the fixing bend 5 to form a firm threaded connection. The snap-fit ​​post 73 mainly serves to connect and position. Its lower end is fixed to the lower embedded part 2 by threads, so that the entire snap-fit ​​element 7 is firmly fixed in the lower embedded part 2. The vertical space 10 between the upper embedded part 1 and the lower embedded part 2 is used to accommodate the socket block 72. The socket block 72 can improve the bending resistance of the upper embedded part 1 and the lower embedded part 2 and improve the connection strength between the two embedded parts.

[0029] A movable spring 11 is provided inside the upper embedded part 1. One end of the movable spring 11 abuts against the inner wall of the upper embedded part 1, and the other end abuts against a connecting ring 12. The connecting ring 12 is fixedly connected to the spring steel 6. The bottom of the spring steel 6 abuts against several fixed bends 5. A horizontal space 13 is formed between the top of the fixed bends 5 and the top of the spring steel 6.

[0030] The movable spring 11 provides a continuous axial preload and always abuts against the connecting ring 12, so that the connecting ring 12 always abuts against the top of the fixed bend 5, generating a resisting force on the fixed bend 5. It cooperates with the snap-fit ​​element 7 to keep the fixed bend 5 locked in the vertical direction. During the process of the fixed bend 5 rising or falling, the bottom of the spring steel 6 keeps the fixed bend 5 locked in the horizontal direction. The horizontal space 13 provides corresponding displacement space for the rising and falling of the fixed bend 5, and the connection strength between the upper embedded part 1 and the lower embedded part 2 is enhanced by the above components.

[0031] Both the top of the snap-fit ​​pin 71 and the bottom of the snap-fit ​​post 73 are provided with hexagonal grooves 14. In order to facilitate the threaded connection of the snap-fit ​​element 7 to the snap-fit ​​groove 74 of the fixing wrench 5, a hexagonal groove 14 is provided to facilitate the insertion of a hexagonal wrench into the bottom of the snap-fit ​​pin 71. In order to facilitate the insertion of the snap-fit ​​element 7 into the lower embedded part 2, a hexagonal groove 14 is provided to facilitate the insertion of a hexagonal wrench into the bottom of the snap-fit ​​post 73, thereby facilitating the installation of the snap-fit ​​element 7.

[0032] Both the top of the upper embedded part 1 and the bottom of the lower embedded part 2 are provided with steel bar insertion holes 15; the steel bar insertion holes 15 facilitate the insertion of the end of the steel bar into the steel bar insertion holes 15, and the steel bar is inserted into the ends of the upper embedded part 1 and the lower embedded part 2 by the impact of the stamping structure, so as to ensure the connection strength between the upper embedded part 1 and the lower embedded part 2 and the steel bar.

[0033] The specific embodiments are merely explanations of this utility model and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this utility model.

Claims

1. A double-socket precast concrete connector, comprising an upper embedded part (1) and a lower embedded part (2), both the upper embedded part (1) and the lower embedded part (2) being open structures, the upper embedded part (1) being threadedly connected to a bushing (3), the bushing (3) having an inclined conical surface (4) inside, the inclined conical surface (4) being movably connected to a plurality of fixed levers (5), characterized in that: The fixed bend (5) is elastically connected to a spring steel (6) on its periphery. The spring steel (6) is set in the upper embedded part (1). The inner wall of the fixed bend (5) is threadedly connected to a snap fastener (7). The snap fastener (7) is threadedly connected to the lower embedded part (2).

2. A dual bell concrete precast connector according to claim 1, wherein: The buckle element (7) includes a buckle pin (71), a receiving block (72) is fixedly connected to the bottom of the buckle pin (71), a buckle post (73) is fixedly connected to the bottom of the receiving block (72), and a buckle groove (74) is provided on the inner wall of the fixing lever (5) for the buckle pin (71) to be threaded and fixed.

3. A dual bell concrete precast connector according to claim 2, wherein: The inner walls of the upper embedded part (1) and the lower embedded part (2) are respectively provided with an upper threaded end (8) and a lower threaded end (9). The upper threaded end (8) and the lower threaded end (9) are respectively connected to the bushing (3) and the snap fastener (7) of the snap fastener (7). A vertical space (10) is formed between the upper threaded end (8) and the bottom of the upper embedded part (1) and between the lower threaded end (9) and the top of the lower embedded part (2).

4. A dual bell concrete precast connector according to claim 3, wherein: An active spring (11) is provided inside the upper embedded part (1). One end of the active spring (11) abuts against the inner wall of the upper embedded part (1), and the other end abuts against a connecting ring (12). The connecting ring (12) is fixedly connected to the spring steel (6).

5. A dual bell concrete precast connector according to claim 4, wherein: The bottom of the spring steel (6) abuts against a plurality of fixed bends (5), and a horizontal space (13) is formed between the top of the fixed bends (5) and the top of the spring steel (6).

6. A dual bell concrete precast connector according to claim 2, wherein: The top of the snap pin (71) and the bottom of the snap post (73) are both provided with hexagonal grooves (14).

7. A dual bell concrete precast connector according to claim 1, wherein: The top of the upper embedded part (1) and the bottom of the lower embedded part (2) are both provided with steel bar insertion holes (15).

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