CN219951904U - Pin type mechanical joint and precast concrete pile - Google Patents

Abstract

The utility model discloses a pin type mechanical joint and a precast concrete pile, wherein the mechanical joint comprises a first nut sleeve, a second nut sleeve, a plug rod and a locking positioning pin; the first nut sleeve is connected with the inserted link; the inserted link is provided with a blind hole with a gradually-reduced aperture for the positioning pin; and a locking positioning pin is arranged on the second nut sleeve, and is clamped with the inserted rod after the inserted rod is inserted into the second nut sleeve, so that the inserted rod and the second nut sleeve are limited and fixed. The pin type mechanical connector disclosed by the utility model has the advantages that after the locking positioning pin is clamped with the inserted rod, a locking structure is formed between the locking positioning pin and the second sleeve nut, so that any axial movement cannot be performed between the positioning inserted rod and the second nut sleeve, namely, when precast concrete connection is performed through the anchor type mechanical connector disclosed by the utility model, the complete fit and no gap between the connecting end surfaces of two precast piles can be ensured.

Description

Pin type mechanical joint and precast concrete pile

Technical Field

The utility model relates to the technical field of prefabricated member connection, in particular to a pin type mechanical connector and a prefabricated concrete pile.

Background

The common engineering piles (precast piles) are multi-section piles, and the existing precast concrete pile ends are generally connected with each other rapidly through mechanical joints.

However, the existing precast pile has the following problems: 1. the end face of the precast concrete pile has a certain gradient, and the allowable deviation of the size of the 6-meter pipe pile in national standard GB13476-2009 is specified: for a pipe pile with a diameter of 300mm to 700mm, the inclination distance allowed to exist on the end face is-2 mm to +5mm, and the inclination distance allowed to exist on the end face is-4 mm to +7mm, so that when two piles (with a diameter of 300mm to 700 mm) are butted, when only one pile end face inclination is considered, a gap of 5mm exists at maximum; 2. the precast concrete pile has certain perpendicularity when piling, and the perpendicularity when piling is required to meet the requirement of the specification in the specification of the precast pile construction, namely 7.4.3 th pile is required to be not more than 0.5%.

Because the precast pile has the problems of pile end face inclination and construction pile body perpendicularity errors, a gap exists between the connecting end faces of two sections of precast piles after the precast pile is connected by the existing mechanical connector, so that the problem of unqualified detection can occur when the pile integrity is detected by using small strain; meanwhile, gaps exist between the connecting end faces of the two precast piles, and then the connecting end faces of the precast piles can be crushed or burst in the pile sinking process.

Disclosure of Invention

The present utility model addresses the above-mentioned problems by providing a pin-type mechanical joint.

The utility model adopts the following technical means:

a pin type mechanical joint comprises a first nut sleeve, a second nut sleeve, a plug rod and a locking positioning pin;

one end of the first nut sleeve is connected with the main rib, and the other end of the first nut sleeve is connected with one end of the inserted link;

the other end of the inserted link is provided with a positioning pin blind hole along the radial direction of the inserted link, and the aperture of the positioning pin blind hole is gradually reduced from the outer diameter side of the inserted link to the hole bottom direction of the positioning pin blind hole;

the second nut sleeve comprises a second nut sleeve body and a locking positioning pin mounting cylinder, and one end of the second nut sleeve body is connected with the main rib;

the locking positioning pin installation cylinder is arranged on the second nut sleeve body along the radial direction, and a positioning pin installation cavity communicated with the inserted rod insertion cavity of the second nut sleeve body is arranged in the locking positioning pin installation cylinder;

the locking positioning pin comprises a positioning pin main body used for being connected with the positioning pin installation cavity and a positioning pin head clamped with the positioning pin blind hole, and an external thread is arranged on the positioning pin main body;

after the inserted link is inserted into the inserted link insertion cavity, the locating pin head can pass through the locating pin installation cavity and be clamped with the locating pin blind hole, and is used for limiting and fixing the inserted link and the second nut sleeve.

Further, the tensile strength of the connection of the inserted link and the locking positioning pin is greater than or equal to that of the main rib or the nut sleeve.

Further, after the inserted link is connected with the locking positioning pin in a clamping way, the inserted link does not deform in a ductile way when the inserted link bears a drawing force of 11.7 Mpa.

Further, a first plane is arranged on the inserted link, the first plane corresponds to the position provided with the positioning pin blind hole, a second plane is arranged on the inner wall of the inserted link insertion cavity, and the second plane corresponds to the position of the positioning pin installation cavity;

the first plane interacts with the second plane such that the dowel blind bore is opposite the dowel mounting cavity when the plunger is inserted into the plunger insertion cavity.

Further, the positioning pin blind hole is a round warhead-shaped hole or a conical hole; the positioning pin head is of a round warhead-shaped structure or a frustum structure.

Further, the rubber plug can be plugged into the port of the installation cavity of the locating pin.

Further, epoxy resin glue is further arranged in the second nut sleeve.

Further, one end of the inserted rod inserting cavity, which is close to the inserted rod inserting end, is also provided with an inner hexagonal hole for positioning the port of the positioning pin mounting cavity.

Further, an inner hexagonal hole is formed in the end portion of the positioning pin main body.

A precast concrete pile with a pin type mechanical joint comprises a precast concrete pile body, a main rib arranged in the precast concrete pile body and the pin type mechanical joint disclosed by the utility model;

the first nut sleeve and the second nut sleeve are respectively arranged at two ends of the precast concrete pile body, one end of the main rib is connected with one end of the first nut sleeve, the other end of the main rib is connected with one end of the second nut sleeve body, the port of the locking positioning pin installation cylinder is arranged on the outer side wall of the precast concrete pile body, and the locking positioning pin is arranged in the locking positioning pin installation cylinder.

Compared with the prior art, the pin type mechanical connector disclosed by the utility model has the following beneficial effects: according to the anchor clamping type mechanical connector disclosed by the utility model, the positioning pin blind hole is formed in the inserted rod, the locking positioning pin is arranged in the second nut sleeve, and can be clamped into the positioning pin blind hole after the inserted rod is inserted into the second nut sleeve, so that the inserted rod and the second nut sleeve are clamped and fixedly connected, and therefore, the connection of a precast pile is realized, and the problem that the connection end face of the precast pile is damaged or exploded in the pile sinking process due to the fact that the locking positioning pin is connected through the threaded structure of the second nut sleeve, and therefore, a locking structure is formed between the locking positioning pin and the second nut sleeve after the locking positioning pin is clamped with the inserted rod, so that any axial movement cannot be carried out between the positioning inserted rod and the second nut sleeve, namely, when the precast concrete connection is carried out through the anchor clamping type mechanical connector disclosed by the utility model, the complete fit between the connection end faces of two sections of precast piles can be ensured, and the problem that the detection failure occurs when the pile sinking process is detected by using small strain is eliminated.

Drawings

FIG. 1 is an axial view of a pin mechanical joint of the present disclosure;

FIG. 2 is a front view of a pin mechanical joint of the present disclosure;

FIG. 3 is a cross-sectional view of the male pin mechanical connector of the present disclosure, showing the locking dowel pin not engaged with the plunger rod;

FIG. 4 is a cross-sectional view of a male pin mechanical joint of the present disclosure showing a locking dowel pin in a snap-fit relationship with a plunger;

FIG. 5 is a front view of the first nut sleeve;

FIG. 6 is a cross-sectional view of the first nut sleeve;

FIG. 7 is a front view of the plunger;

FIG. 8 is a cross-sectional view of the plunger;

FIG. 9 is an axial view of a second nut sleeve;

FIG. 10 is a cross-sectional view of a second nut sleeve;

FIG. 11 is a front view of the locking dowel pin;

FIG. 12 is a right side view of FIG. 11;

FIG. 13 is a schematic view of the connection structure of precast concrete piles having a pin-type mechanical joint according to the present disclosure; two precast concrete piles are connected in the figure;

fig. 14 is a schematic view of the structure of the pin-type mechanical joint connection in precast concrete piles.

In the figure: 1. a first nut sleeve; 10. the first main rib connecting end; 11. the connecting end of the inserted link;

2. a second nut sleeve; 20. a second nut sleeve body; 200. the second main rib connecting end; 201. the insertion end of the insertion rod; 202. an inner hexagonal hole; 21. a locking positioning pin mounting cylinder; 210. a locating pin mounting cavity; 211. 22, inserting the inserted rod into the cavity; 220. a second plane;

3. a rod; 30. a plunger fixing part; 31. a rod clamping part; 310. a first plane; 32. positioning pin holes;

4. locking the positioning pin; 40. a locating pin body; 41. positioning pin heads;

5. a rubber plug;

60. a main rib; 61. and prefabricating the concrete pile body.

Detailed Description

Referring to fig. 1, 2, 3 and 4, the pin type mechanical joint disclosed by the utility model comprises a first nut sleeve 1, a second nut sleeve 2, a plug rod 3 and a locking positioning pin 4;

as shown in fig. 5 and 6, one end of the first nut sleeve 1 is a first main rib connecting end 10, the first main rib connecting end 10 is connected with a main rib 60, the other end is a rod inserting connecting end 11, and an internal thread is arranged in the rod inserting end 11 and is used for being connected with one end of the rod inserting 3;

as shown in fig. 7 and 8, one end of the insert rod 3 is an insert rod fixing part 30, the other end is an insert rod clamping part 31, external threads are arranged on the insert rod fixing part 30 for connection of the first nut sleeve 1, a positioning pin blind hole 32 is arranged on the insert rod clamping part 31 along the radial direction of the insert rod 3, and the aperture of the positioning pin blind hole 32 is gradually reduced from the outer diameter side of the insert rod 3 to the hole bottom direction of the positioning pin blind hole 32;

as shown in fig. 9 and 10, the second nut sleeve 2 includes a second nut sleeve body 20 and a locking positioning pin mounting cylinder 21, one end of the second nut sleeve body 20 is a second main rib connecting end 200, the second main rib connecting end 200 is connected with the main rib 60, the other end is a plug rod inserting end 201, and a plug rod inserting cavity 22 is provided in the second nut sleeve body 20;

the locking and positioning pin mounting cylinder 21 is disposed on the second nut sleeve body 20 in the radial direction, and in this embodiment, the second nut sleeve body 20 and the locking and positioning pin mounting cylinder 21 are integrally formed; a locating pin installation cavity 210 communicated with the inserted rod insertion cavity 22 of the second nut sleeve body 20 is arranged in the locking locating pin installation cylinder 21;

as shown in fig. 11 and 12, the locking positioning pin 4 includes a positioning pin main body 40 for connecting with the positioning pin installation cavity 210 and a positioning pin head 41 engaged with the positioning pin blind hole 32, the positioning pin main body 40 is provided with an external thread, and in this embodiment, the positioning pin blind hole 32 is a circular bullet-shaped hole or a conical hole; the positioning pin head 41 is in a round bullet-shaped structure or a frustum structure; the end of the positioning pin main body 40 is provided with an inner hexagonal hole;

after the insert rod 3 is inserted into the insert rod insertion cavity 22, the positioning pin head 41 can pass through the positioning pin installation cavity 210 and be engaged with the positioning pin blind hole 32, so as to limit and fix the insert rod 3 and the second nut sleeve 2.

According to the anchor clamping type mechanical connector disclosed by the utility model, the positioning pin blind hole is formed in the inserted rod, the locking positioning pin is arranged in the second nut sleeve, and can be clamped into the positioning pin blind hole after the inserted rod is inserted into the second nut sleeve, so that the inserted rod and the second nut sleeve are clamped and fixedly connected, and therefore, the connection of a precast pile is realized, and the problem that the connection end face of the precast pile is damaged or exploded in the pile sinking process due to the fact that the locking positioning pin is connected through the threaded structure of the second nut sleeve, and therefore, a locking structure is formed between the locking positioning pin and the second nut sleeve after the locking positioning pin is clamped with the inserted rod, so that any axial movement cannot be carried out between the positioning inserted rod and the second nut sleeve, namely, when the precast concrete connection is carried out through the anchor clamping type mechanical connector disclosed by the utility model, the complete fit between the connection end faces of two sections of precast piles can be ensured, and the problem that the detection failure occurs when the pile sinking process is detected by using small strain is eliminated. Meanwhile, because the locating pin blind hole and the locating pin head are of a conical clamping structure (the round warhead-shaped hole is clamped with the round warhead-shaped structure or the conical hole is clamped with or the conical structure, namely, the aperture is gradually reduced from the outer diameter side direction of the inserted link to the bottom direction of the hole), and because the locating pin blind hole and the locating pin head are of the conical clamping structure, the locking locating pin generates downward pulling force on the inserted link in the process of inserting the locking locating pin into the locating pin blind hole, the connecting end faces of the two sections of precast concrete piles are completely bonded without gaps after the inserted link and the locking locating pin are further ensured, and therefore the connecting performance between precast piles is improved. Meanwhile, even if the positions of the positioning pin blind hole and the positioning pin head of the inserted link have a certain error, the locking positioning pin and the inserted link can be clamped without gaps.

Advancing oneAnd step, the tensile strength of the connection of the inserted link 3 and the locking positioning pin 4 is greater than or equal to that of the main rib or the nut sleeve. Preferably, the insert rod 3 is not ductile when receiving a drawing force of 11.7Mpa after being clamped with the locking positioning pin 4. According to the utility model, the strength of the inserted link after being clamped with the locking positioning pin is larger than or equal to the tensile strength of the main rib or the nut sleeve, and the inserted link 3 does not ductile deform when being subjected to a drawing force of 11.7Mpa after being clamped with the locking positioning pin 4, so that the pin type mechanical joint, the main rib and the connecting sleeve do not ductile deform before the precast concrete pile is subjected to the drawing force which enables the main rib to ductile deform, and therefore cracks or gaps are not generated between the connecting end surfaces of the two precast piles, and the pin type mechanical joint disclosed by the utility model can be reliably connected without being damaged before the main rib is ductile and is broken, so that the connecting performance of the precast concrete pile for connecting by adopting the pin type mechanical joint disclosed by the utility model is further ensured. Specifically, in the national construction standard design atlas "precast concrete square pile" (atlas number: 20G 361), the relation between the model of the pile and the prestressed main rib is specified in detail in the prestressed concrete square pile reinforcement and the mechanical property table, for example, the main rib of the pile prestressed main rib with the pile section of 600x600 is specified to be 24 phi ^D 12.6; the pile section model and the pile shaft axial tension bearing capacity design value Nt (kN) are specified in detail in the pile shaft axial compression resistance and the positive section bending bearing capacity of the prestressed concrete square pile, the B-shaped pile with the pile section of 600x600 is specified in the table, the pile shaft axial tension bearing capacity design value is 2544kN, and the tension bearing capacity design value of the prestressed main rib of the precast pile is 2544/24=10.6kN can be calculated according to the data; 10.6x1.1=11.66=11.7 kN, namely the pin type mechanical joint disclosed by the utility model has no ductile deformation of the main rib of the precast concrete pile and the pin type mechanical joint in the tensile pulling force of 11.7kN, and no sliding exists between the positioning inserted link and the second nut sleeve, so that gaps are not generated between the connecting end faces of the precast concrete pile, and the connecting performance of the precast concrete pile is ensured.

Further, as shown in fig. 7, 8 and 10, the insert rod 3 is provided with a first plane 310, the first plane 310 corresponds to the position where the positioning pin blind hole 32 is provided, the inner wall of the insert rod insertion cavity 22 is provided with a second plane 220, and the second plane 220 corresponds to the position where the positioning pin installation cavity 210 is provided; the first plane 310 interacts with the second plane 220 such that the dowel blind bore 32 is opposite the dowel mounting cavity 210 during insertion of the insert pin 3 into the insert pin insertion cavity 22. Because be equipped with first plane on inserted bar card solid portion, be equipped with the second plane on the inner wall in inserted bar insertion chamber for at the in-process that the inserted bar inserted second nut sleeve, produce guiding action between second plane and the first plane, and then guarantee after the inserted bar inserts second nut sleeve, first plane and second plane are relative to make the locating pin blind hole with the locating pin installation cavity's position is corresponding, thereby make locking locating pin can effectually insert in the locating pin blind hole of inserted bar.

Further, as shown in fig. 3, the rubber stopper 5 capable of being plugged into the dowel mounting cavity port 211 is further included. The positioning pin installation cavity can be sealed in the precast concrete pile pouring manufacturing process by arranging the rubber plugs, so that concrete grout is prevented from entering the positioning pin installation cavity. Simultaneously, in the concrete pile connection process, can pull out the rubber end cap from the port of locating pin installation cavity to use tools such as hexagonal spanner to insert in the interior hexagonal hole of locking locating pin tip so as to twist the locking locating pin, realize that the locating pin head inserts in the locating pin blind hole.

Further, an epoxy resin glue is further disposed in the second nut sleeve 2. Due to the arrangement of the epoxy resin glue, the epoxy resin glue is filled in the second nut sleeve, gaps among all parts in the pin type mechanical joint, particularly gaps between the inserted rod and the second nut sleeve (the inserted rod inserting cavity), can be effectively filled after the epoxy resin glue is solidified, and the pulling resistance and the shearing resistance of the concrete pile by adopting the pin type mechanical joint disclosed by the utility model are further improved.

Further, as shown in fig. 9 and 10, the end of the insert rod insertion cavity 22 near the insert rod insertion end 201 is further provided with an inner hexagonal hole 202 for positioning the end of the positioning pin installation cavity 210. The end part of the second nut sleeve is provided with an inner hexagonal hole, and the inner hexagonal hole can be clamped on a hexagonal boss on a tension plate in the manufacturing process of the precast concrete pile so as to ensure that the port of the locking positioning pin mounting cylinder faces the outer side of the precast concrete pile reinforcement cage, and therefore after the precast concrete pile is manufactured, the end part of the locking positioning pin mounting cylinder is arranged on the outer side wall of the precast concrete pile body.

A precast concrete pile having a pin type mechanical joint, as shown in fig. 13 and 14, comprising a precast concrete pile body 61, a main rib 60 disposed in the precast concrete pile body 61, and the pin type mechanical joint of the present disclosure;

the first nut sleeve 1 and the second nut sleeve 2 are respectively arranged at two ends of the precast concrete pile body 61, one end of the main rib 60 is connected with one end of the first nut sleeve 1, the other end of the main rib 60 is connected with one end of the second nut sleeve body 20, the other end of the first nut sleeve 1 is provided with the inserted link 3, the locking positioning pin mounting cylinder port 211 is arranged on the outer side wall of the precast concrete pile body 61, and the locking positioning pin 4 is arranged in the locking positioning pin mounting cylinder 21;

when two precast concrete piles are connected, epoxy resin glue is injected into the connecting surface of the two precast piles and the second nut sleeve, one end of the inserted link 3 of one precast concrete pile is close to one end of the second nut sleeve of the other precast concrete pile, so that the inserted link 3 is inserted into the second nut sleeve 2, after the inserted link 3 is inserted into the second nut sleeve 2, a rubber plug arranged at a port of a locking positioning pin sleeve is removed at the outer side wall of the precast concrete, then a locking positioning pin is screwed by an electric wrench or other tools, the locking positioning pin 4 moves along the radial direction of the second nut sleeve, and the positioning pin head is inserted into a positioning pin blind hole, thereby realizing the fixed connection of two adjacent precast concrete piles. Meanwhile, when the mechanical joint is subjected to a specified drawing force, the mechanical joint is free from ductile deformation, the inserted link and the second nut sleeve are free from sliding, and no gap is formed between the connecting surfaces of the precast concrete piles in a fully attached mode, so that the connecting performance of the precast concrete piles is guaranteed.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. A pin-type mechanical joint, characterized in that: comprises a first nut sleeve (1), a second nut sleeve (2), a plug rod (3) and a locking positioning pin (4);

one end of the first nut sleeve (1) is connected with the main rib (60), and the other end of the first nut sleeve is connected with one end of the inserted link (3);

the other end of the inserted link (3) is provided with a positioning pin blind hole (32) along the radial direction of the inserted link (3), and the aperture of the positioning pin blind hole (32) is gradually reduced from the outer diameter side of the inserted link (3) to the bottom direction of the hole;

the second nut sleeve (2) comprises a second nut sleeve body (20) and a locking positioning pin mounting cylinder (21), and one end of the second nut sleeve body (20) is connected with the main rib (60);

the locking positioning pin installation cylinder (21) is arranged on the second nut sleeve body (20) along the radial direction, and a positioning pin installation cavity (210) communicated with a inserted rod insertion cavity (22) of the second nut sleeve body (20) is arranged in the locking positioning pin installation cylinder (21);

the locking positioning pin (4) comprises a positioning pin main body (40) used for being connected with the positioning pin installation cavity (210) and a positioning pin head (41) clamped with the positioning pin blind hole (32), and an external thread is arranged on the positioning pin main body (40);

after the inserted rod (3) is inserted into the inserted rod insertion cavity (22), the positioning pin head (41) can pass through the positioning pin installation cavity (210) and be clamped with the positioning pin blind hole (32) so as to limit and fix the inserted rod (3) and the second nut sleeve (2).

2. The pin-type mechanical joint of claim 1, wherein: the tensile strength of the connection of the inserted link (3) and the locking positioning pin (4) is greater than or equal to that of the main rib or the nut sleeve.

3. The pin-type mechanical joint of claim 1, wherein: the inserted link (3) is in clamping connection with the locking positioning pin (4) and does not have ductile deformation when bearing a drawing force of 11.7 Mpa.

4. A pin mechanical joint according to any one of claims 1 to 3, characterized in that: the insert rod (3) is provided with a first plane (310), the first plane (310) corresponds to the position provided with the positioning pin blind hole (32), the inner wall of the insert rod insertion cavity (22) is provided with a second plane (220), and the second plane (220) corresponds to the position of the positioning pin installation cavity (210);

the first plane (310) interacts with the second plane (220) such that the dowel blind hole (32) is opposite the dowel mounting cavity (210) when the dowel (3) is inserted into the dowel insertion cavity (22).

5. The pin-type mechanical joint of claim 4, wherein: the positioning pin blind hole is a round warhead-shaped hole or a conical hole; the positioning pin head is of a round warhead-shaped structure or a frustum structure.

6. The pin-type mechanical joint of claim 5, wherein: the rubber plug (5) can be plugged into the port of the locating pin installation cavity (210).

7. The pin-type mechanical joint of claim 6, wherein: and epoxy resin glue is also arranged in the second nut sleeve (2).

8. The pin-type mechanical joint of claim 1, wherein: the end of the inserted rod inserting cavity (22) close to the inserted rod inserting end (201) is further provided with an inner hexagonal hole (202) for positioning the port of the positioning pin mounting cavity (210).

9. The pin-type mechanical joint of claim 1, wherein: and an inner hexagonal hole is formed in the end portion of the positioning pin main body.

10. A precast concrete pile having a pin-type mechanical joint, characterized in that: comprising a precast concrete pile body (61), a main rib (60) provided in the precast concrete pile body (61), a pin-type mechanical joint according to any one of claims 1 to 9;

the first nut sleeve (1) and the second nut sleeve (2) are respectively arranged at two ends of the precast concrete pile body (61), one end of the main rib (60) is connected with one end of the first nut sleeve (1), the other end of the main rib is connected with one end of the second nut sleeve body (20), a port of the locking positioning pin installation cylinder (21) is arranged on the outer side wall of the precast concrete pile body, and the locking positioning pin (4) is arranged in the locking positioning pin installation cylinder (21).