CN219753211U - Mechanical joint with guide structure and precast pile - Google Patents

Abstract

The utility model discloses a mechanical joint with a guide structure and a precast pile, wherein the mechanical joint with the guide structure comprises a positioning inserted bar and a limiting clamping sleeve; the positioning inserted link comprises an inserted link fixing seat, a plug and a plug connecting part; the plug connecting part comprises a frustum-shaped first connecting part and a cylindrical second connecting part; the limiting clamping sleeve comprises a limiting clamping sleeve body and a plurality of elastic sheets which are arranged at one end of the limiting clamping sleeve body and are circumferentially arranged along the limiting clamping sleeve body; the inner wall surface of the limiting cutting sleeve body comprises a first inner wall surface of a conical surface structure and a second inner wall surface of a cylindrical surface structure; the second inner wall surface is close to one side provided with the elastic sheet; when the positioning inserted rod is inserted into the limiting clamping sleeve, the second inner wall surface interacts with the second connecting part to guide the positioning inserted rod; after the positioning inserted bar is inserted into the limiting clamping sleeve, the elastic sheet is clamped with the plug. The utility model can reduce or eliminate the abrasion of the positioning inserted link and the limiting clamping sleeve caused by inclination, and improve the connection performance of the mechanical connector.

Description

Mechanical joint with guide structure and precast pile

Technical Field

The utility model relates to the technical field of prefabricated part connection, in particular to a mechanical joint with a guiding structure and a prefabricated 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.

The existing mechanical connector generally comprises a positioning inserted link and a limiting clamping sleeve, wherein the positioning inserted link is inserted into the limiting clamping sleeve to realize mutual clamping, however, the existing mechanical connector has the following problems: in the process that the plug of location inserted bar inserts spacing cutting ferrule's shell fragment, because reasons such as slope or the slope when location inserted bar installation of stake terminal surface cause the axis of location inserted bar to incline into certain angle with spacing cutting ferrule's axis easily, and then, at the in-process that location inserted bar inserts spacing cutting ferrule, the plug of location inserted bar can with spacing cutting ferrule's shell fragment between transition wearing and tearing to influence the connection performance between plug and the shell fragment, and then reduce the resistance to plucking of stake connection.

Disclosure of Invention

The utility model provides a mechanical joint with a guiding structure and a precast pile.

The utility model adopts the following technical means:

a mechanical joint with a guide structure comprises a positioning inserted link and a limiting clamping sleeve;

the positioning inserted link comprises an inserted link fixing seat, a plug and a plug connecting part for connecting the inserted link fixing seat and the plug;

the plug connecting part comprises a frustum-shaped first connecting part connected with the inserted link fixing seat and a cylindrical second connecting part connected with the plug;

the limiting clamp sleeve comprises a limiting clamp sleeve body and a plurality of elastic sheets which are arranged at one end of the limiting clamp sleeve body and are circumferentially arranged along the limiting clamp sleeve body;

the inner wall surface of the limiting cutting sleeve body comprises a first inner wall surface of a conical surface structure and a second inner wall surface of a cylindrical surface structure; the second inner wall surface is close to one side provided with the elastic sheet;

when the positioning inserted rod is inserted into the limiting clamping sleeve, the second inner wall surface interacts with the second connecting part to guide the positioning inserted rod; after the positioning inserting rod is inserted into the limiting clamping sleeve, the elastic sheet is clamped with the plug.

Further, the inner diameter of the second inner wall surface is larger than the outer diameter of the second connecting portion, and the difference between the inner diameter of the second inner wall surface and the outer diameter of the second connecting portion is 0-0.15mm.

Further, a dovetail taper clamping table is arranged on the plug to form a single dovetail taper clamping table, and a dovetail taper clamping groove is arranged on the inner wall of the elastic sheet to form a single dovetail taper clamping groove;

or the plug is provided with two dovetail taper clamping tables to form a double dovetail taper clamping table, and the inner wall of the elastic sheet is provided with two dovetail taper clamping grooves to form a double dovetail taper clamping groove;

or the plug is provided with a plurality of dovetail taper clamping tables to form a plurality of dovetail taper clamping tables, and the inner wall of the elastic sheet is provided with a plurality of dovetail taper clamping grooves to form a plurality of dovetail taper clamping grooves;

when the plug is inserted into the limiting clamping sleeve, the dovetail taper clamping groove is clamped with the dovetail taper clamping table.

Further, when the elastic sheet is in a free state, the diameter of the small diameter end of the dovetail taper clamping groove is smaller than or equal to that of the small diameter end of the dovetail taper clamping table.

Further, the dovetail taper clamping table comprises a plug clamping surface and a plug transition surface;

the dovetail taper clamping groove comprises a spring plate clamping surface and a spring plate transition surface;

when the positioning inserted bar is inserted into the limiting clamping sleeve, the plug clamping surface and the elastic sheet clamping surface are mutually clamped, and a moving gap is formed between the plug transition surface and the elastic sheet transition surface.

Further, the length of the plug clamping surface and the length of the spring plate clamping surface are greater than or equal to 7mm.

Further, the dovetail taper clamping table is provided with teeth, and the plug transition surface is an arc transition surface.

A precast pile comprises a precast pile body, a first nut sleeve, a second nut sleeve and a mechanical joint with a guiding structure;

the first nut sleeve and the second nut sleeve are respectively arranged at two ends of the precast pile body;

one end of the first nut sleeve is fixedly connected with one end of a main rib in the precast pile body, and the other end of the first nut sleeve is fixedly connected with the inserted bar fixing seat;

one end of the second nut sleeve is fixedly connected with the other end of the main rib in the precast pile body, and the limiting clamping sleeve is arranged in the other end of the second nut sleeve.

A precast pile comprises a precast pile body, a first end plate, a second end plate and a mechanical joint with a guiding structure;

the first end plate and the second end plate are respectively arranged at two ends of the precast pile body;

the first end plate is provided with a first main rib mounting hole and a positioning inserting rod mounting hole, the first main rib mounting hole is fixedly connected with one end of a main rib in the precast pile body, and the positioning inserting rod is mounted in the positioning inserting rod mounting hole;

the second end plate is provided with a second main rib mounting hole and a limiting clamping sleeve mounting hole, the second main rib mounting hole is fixedly connected with the other end of the main rib in the precast pile body, and the limiting clamping sleeve is mounted in the limiting clamping sleeve mounting hole.

Still further, the precast pile body is internal with spacing cutting ferrule mounting hole department that corresponds is equipped with spacing cutting ferrule holding tank.

Further, the main rib is any one or a combination of a plurality of screw steel, PC steel bars and steel strands.

Further, structural adhesive is also injected between the connecting end surfaces of two adjacent precast piles and in the mechanical joint with the guiding structure.

Compared with the prior art, the mechanical joint with the guiding structure disclosed by the utility model has the following beneficial effects: the connecting part of the positioning inserting rod comprises the frustum-shaped first connecting part and the cylindrical second connecting part connected with the plug, so that the cylindrical second connecting part sequentially interacts with the first inner wall surface of the conical surface structure and the second inner wall surface of the cylindrical surface structure in the process of inserting the positioning inserting rod into the limiting clamping sleeve, the guiding effect on the positioning inserting rod is achieved, when the positioning inserting rod is inclined to a certain extent relative to the limiting clamping sleeve, the second connecting part and the inner wall of the limiting clamping sleeve body can correct the positioning inserting rod, the axes of the positioning inserting rod and the limiting clamping sleeve body are consistent, abrasion caused by the inclination of the positioning inserting rod and the limiting clamping sleeve is reduced or eliminated, and the connecting performance of the mechanical connector is improved.

Simultaneously, when the locating inserted link inserts in the spacing cutting ferrule, the first connecting portion of frustum form interacts with the first internal face of conical surface structure, and the second connecting portion of cylinder form interacts with the second internal face of cylindrical surface structure for the locating inserted link can carry out the joint with spacing cutting ferrule in any state, and then has solved the free clearance of axial between bullet card and the plug of current mechanical joint, causes prefabricated concrete pile to connect's resistance to plucking performance and the problem that the performance reduces of cutting.

Drawings

Fig. 1 is a schematic view of a positioning insert rod of an embodiment 1 of a mechanical joint with a guiding structure in a process of inserting a limiting ferrule;

FIG. 2 is a block diagram of a positioning plunger of a mechanical joint with guiding structure disclosed in embodiment 1 of the present utility model;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is a structural diagram of a limiting ferrule of a mechanical joint with a guiding structure disclosed in embodiment 1 of the present utility model;

FIG. 5 is an enlarged schematic view of portion B of FIG. 4;

FIG. 6 is an enlarged schematic view of portion C of FIG. 4;

FIG. 7 is a schematic view of a process of inserting a positioning plunger of a mechanical joint with a guiding structure into a limiting ferrule while tilting relative to the limiting ferrule;

FIG. 8 is a schematic illustration of a positioning insert rod of a mechanical joint with a guiding structure of the present disclosure after being corrected during insertion into a limiting ferrule when tilted relative to the limiting ferrule;

FIG. 9 is a schematic view of a positioning plunger of a mechanical joint with guiding structure according to the present disclosure after insertion into a limiting ferrule;

FIG. 10 is a cross-sectional view taken at D-D of FIG. 9;

FIG. 11 is a schematic view of a positioning plunger and a limiting ferrule of a mechanical joint with a guiding structure according to the present utility model with a certain axial free;

FIG. 12 is a cross-sectional view taken at E-E of FIG. 11;

FIG. 13 is a block diagram of a positioning plunger disclosed in embodiment 2 of the present utility model;

fig. 14 is a structural diagram of a limiting ferrule disclosed in embodiment 2 of the present utility model;

FIG. 15 is a block diagram of a positioning plunger disclosed in embodiment 3 of the present utility model;

fig. 16 is a structural diagram of a limiting ferrule disclosed in embodiment 3 of the present utility model;

FIG. 17 is a block diagram of a first embodiment of a precast pile having a mechanical joint according to the present disclosure, in which nut sleeves are provided at both ends of a precast pile body;

FIG. 18 is an enlarged view of the dashed box in FIG. 17;

FIG. 19 is a block diagram of a first embodiment of a precast pile having a mechanical joint according to the present disclosure, the main reinforcement being a PC steel bar;

FIG. 20 is a block diagram of a first embodiment of a precast pile having a mechanical joint of the present disclosure, the main tendons being screw steels;

FIG. 21 is a block diagram of a first embodiment of a precast pile having a mechanical joint of the present disclosure, the main tendons being steel strands and deformed steel bars;

FIG. 22 is a block diagram of a first embodiment of a precast pile having a mechanical joint of the present disclosure, the main tendons being screw steel and PC steel bars;

FIG. 23 is a block diagram showing a second embodiment of a precast pile having a mechanical joint according to the present utility model, in which end plates are provided at both ends of a precast pile body;

FIG. 24 is a block diagram of a first header plate;

FIG. 25 is a block diagram of a second header plate;

fig. 26 is a schematic diagram of a second embodiment of a precast pile after connection.

In the figure: 1. positioning the inserted link; 10. the inserted link fixing seat; 100. a clamping structure; 11. a plug; 110. dovetail taper clamping table; 111. a guide conical surface; 112. an arc-shaped transition surface; 12. a plug connection portion; 120. a first connection portion; 121. a second connecting portion;

2. limiting clamping sleeve; 20. a limiting cutting sleeve body; 200. a first inner wall surface; 201. a second inner wall surface; 21. a spring plate; 210. the end face of the spring plate; 211. a spring plate clamping surface; 212. dovetail taper clamping grooves; 213. the second elastic sheet is clamped on the fixing surface; 214. arc parts of the spring plates; 215. a conical part of the spring plate; 22. a clamping cavity; 23. moving the gap;

50. a first nut sleeve; 51. a second nut sleeve;

60. a first end plate; 600. a first main rib mounting hole; 601. positioning the inserted link mounting hole; 61. a second end plate; 610. a second main rib mounting hole; 611. limiting the mounting hole of the cutting sleeve;

7. precast pile body; 70. a main rib; 71. limiting clamping sleeve accommodating groove;

8. structural adhesive.

Detailed Description

Example 1

The utility model discloses a mechanical joint with a guiding structure, which comprises a positioning inserted link 1 and a limiting clamping sleeve 2 as shown in fig. 1.

As shown in fig. 2 and 3, the positioning plunger 1 includes a plunger holder 10, a plug 11, and a plug connection portion 12 for connecting the plunger holder 10 and the plug 11.

Further, as shown in fig. 1 and 2, the plug connection portion 12 includes a first connection portion 120 having a frustum shape connected to the plug-rod fixing base 10 and a second connection portion 121 having a cylindrical shape connected to the plug 11.

As shown in fig. 4 and fig. 5, the limiting ferrule 2 includes a limiting ferrule body 20 and a plurality of elastic pieces 21 disposed at one end of the limiting ferrule body 20 and arranged along the circumferential direction of the limiting ferrule body 20, where one end of the elastic piece 21, which is far away from the end connected with the limiting ferrule body 20, is a free end; as shown in fig. 4 and 7, when no inclination exists between the positioning insert rod 1 and the limiting clamping sleeve 2, the plug 11 of the positioning insert rod 1 can be smoothly inserted between the elastic sheets 21 of the limiting clamping sleeve 2 along the direction of a in the drawing so as to realize clamping connection between the two;

as shown in fig. 8, when a certain angle of inclination exists between the positioning insert rod 1 and the limiting sleeve 2, in the process of inserting the plug 11, as the cylindrical second connecting part 121 is arranged on the positioning insert rod 1, the second connecting part 121 interacts with the inner wall of the limiting sleeve body 20, namely, the limiting sleeve body 20 plays a role in guiding and correcting the positioning insert rod 1, so that the positioning insert rod 1 rotates around the direction shown by an arrow D in the figure, and the inclination between the positioning insert rod 1 and the limiting sleeve 2 is eliminated, so that the problem that the mechanical joint connection performance is affected because of transitional abrasion caused by the inclination between the positioning insert rod 1 and the limiting sleeve 2 is avoided.

In this embodiment, two dovetail taper clamping blocks are arranged on the plug 11 to form a double dovetail taper clamping block 110; correspondingly, the inner wall of the spring 21 is provided with a double-dovetail taper clamping groove 212, and preferably, when the spring 21 is in a free state, the diameter of the small diameter end of the double-dovetail taper clamping groove 212 is smaller than or equal to the diameter of the small diameter end of the double-dovetail taper clamping table 110. In the utility model, as the plug 11 and the spring piece 21 are respectively provided with the double-dovetail taper clamping table and the double-dovetail taper clamping groove 212, a double-dovetail taper wedge clamping structure is formed between the plug 11 and the spring piece 21, and the diameter of the small diameter end of the double-dovetail taper clamping groove 212 is smaller than or equal to that of the small diameter end of the double-dovetail taper clamping table 110 when the spring piece 21 of the limiting clamping sleeve 2 is in a free state, when the plug 11 is inserted into the limiting clamping sleeve 2, the two groove edges of the double-dovetail taper clamping groove 212 can be clamped with the double-dovetail taper clamping table 110 in any state, thereby solving the problems of reduced pulling resistance and shearing resistance of the connection of the precast concrete pile caused by the axial free clearance between the spring piece 21 and the plug 11 of the traditional mechanical connector, and particularly, as shown in figures 9 to 12, wherein, fig. 9 and 10 are the states that the diameter of the small diameter end of the double-dovetail taper clamping groove is equal to the diameter of the small diameter end of the double-dovetail taper clamping table and the plug is just completely clamped with the spring plate after being inserted into the spring plate, in this state, the double-dovetail taper clamping groove is completely clamped with the double-dovetail taper clamping table, at this time, the plug is in surface contact clamping with the spring plate, fig. 11 and 12 are the states that the diameter of the small diameter end of the double-dovetail taper clamping groove is equal to the diameter of the small diameter end of the double-dovetail taper clamping table and the plug has a certain axial free L (the inserted rod is inserted into or is underinserted into the spring plate to a certain extent) or the diameter of the small diameter end of the double-dovetail taper clamping groove is smaller than the diameter of the small diameter end of the double-dovetail taper clamping table, at this time, when the plug is inserted into the spring plate of the limiting clamping sleeve, the edges of the double-dovetail taper clamping groove are clamped with the double-dovetail taper clamping table, namely in the whole axial free surface (taper surface of the clamping table), the double-dovetail taper clamping grooves can be clamped with the double-dovetail taper clamping table without forming an axial free gap, so that the pulling resistance and the shearing resistance between precast concrete piles are ensured when the mechanical joint disclosed by the utility model is adopted for connecting precast concrete piles.

Further, because at least two groove edges of the double-dovetail taper clamping groove are clamped with the double-dovetail taper clamping table in any state of clamping the positioning inserting rod 1 and the limiting clamping sleeve (for example, when the diameter of the small diameter end of the double-dovetail taper clamping groove is equal to the diameter of the small diameter end of the double-dovetail taper clamping table and the plug is just in a state of being completely clamped with the elastic piece, the double-dovetail taper clamping groove is in surface contact with the double-dovetail taper clamping table, when the diameter of the small diameter end of the double-dovetail taper clamping groove is smaller than the diameter of the small diameter end of the double-dovetail taper clamping table or when the diameter of the small diameter end of the double-dovetail taper clamping groove is equal to the diameter of the small diameter end of the double-dovetail taper clamping table and the plug is not in a state of being completely clamped with the elastic piece, the double-dovetail taper clamping groove is in contact with two edges of the double-dovetail taper clamping table, namely each elastic piece is in contact with the plug in two lines, namely the contact area of the elastic piece and the plug is increased, particularly, the double-dovetail taper wedge clamping structure is adopted, the number of contact points of the elastic piece and the plug is multiplied by 4 times, compared with the number of contact points of the existing mechanical structure, the number of contact points is increased by 4 times, as shown as A1-A8 in FIG. 12, the deformation amount between the elastic piece and the plug is greatly reduced relative to the existing mechanical connector under the action of the pulling force or the shearing force of the plug, and therefore the axial movement amount of the inserting rod along the inserting rod caused by deformation of the plug in the pulling force or the shearing force of the plug is reduced, and the pulling resistance and the shearing resistance of the precast concrete pile are further improved.

Further, as shown in fig. 1, fig. 4 and fig. 6, the inner wall surface of the limiting ferrule body 20 includes a first inner wall surface 200 with a conical surface structure and a second inner wall surface 201 with a cylindrical surface structure; the second inner wall 201 is near the side where the spring piece 21 is provided. Preferably, the inner diameter of the second inner wall surface 201 is larger than the outer diameter of the second connection part 121, and the difference between the inner diameter of the second inner wall surface 201 and the outer diameter of the second connection part 121 is 0-0.15mm. Because the second cylindrical connecting part 121 is arranged on the plug connecting part 12, the second cylindrical inner wall surface 201 is arranged on the inner wall surface of the limiting clamping sleeve body 20, so that the second inner wall surface 201 and the second connecting part 121 interact with each other in the process of inserting the positioning inserting rod 1 into the limiting clamping sleeve 2, and the problems that the positioning inserting rod 1 is inclined in the process of inserting so that abrasion is caused between the elastic sheet 21 and the plug 11 or the elastic sheet 21 on one side is damaged due to overlarge stress and the like are effectively avoided.

Further, the taper of the dovetail taper clamping table 110 and the taper of the dovetail taper clamping groove 212 are 30 ° -60 °, so that good mechanical connection performance can be obtained.

Further, teeth are provided on the dovetail taper clamping table 110, so as to further improve the pulling resistance of the pile connection.

Further, as shown in fig. 2 and 3, the dovetail taper clamp 110 includes a plug clamping face 112 and a plug transition face 113;

the dovetail taper clamping groove 212 comprises a spring clamping surface 211 and a spring transition surface 216;

when the positioning insert rod 1 is inserted into the limiting sleeve, the plug clamping surface 211 and the spring plate clamping surface 110 are clamped with each other, and a moving gap 23 is formed between the plug transition surface and the spring plate transition surface. As shown in fig. 9, since the moving gap 23 is formed between the plug transition surface and the spring plate transition surface, when the plug 11 is inserted into the spring plate 21, the radial wrapping force of the spring plate 21 can make the spring plate 21 clamp-fix the plug clamping surface of the plug 11 to generate a downward component force, and further pull the positioning insert rod 1 to move downward, so that the axial gap formed when the positioning insert rod 1 (insert rod fixing seat) and the precast pile (nut sleeve or end plate) are in threaded connection can be eliminated, and the connection strength of the positioning insert rod 1 and the pile is improved.

Further, the plug transition surface is an arc transition surface. Namely, as shown in fig. 2 and 3, the front end of the dovetail taper clamping table is provided with an arc-shaped transition surface, so that the thickness of the front end of the double dovetail taper clamping table is increased, the strength of the plug is further improved, and the damage of the plug when the pull-out force of the precast pile is acted can be reduced.

Further, the length of each dovetail taper clamping table is greater than or equal to 7mm, so that even if a certain gradient exists on the end face of a concrete pile or a certain pile perpendicularity error exists during concrete piling, a certain axial free distance exists between plug insertion elastic sheets, the axial free distance is still smaller than the length of each dovetail taper clamping table, further, the insertion rod and the limiting clamping sleeve can be clamped together effectively, and accordingly connection reliability of the precast concrete pile is guaranteed.

Further, the double dovetail taper clamping groove 212 includes two groups of spring clamping surfaces 211 with consistent taper, the spring clamping surfaces 211 near the ends of the spring enclose a tapered clamping cavity 22, and when the supporting block 3 is clamped into the clamping cavity 22, the group of spring clamping surfaces 211 are clamped with the outer wall surface of the supporting block 3. Namely, the elastic sheet clamping surface at the end part of the elastic sheet is used as a contact surface for being clamped with the supporting blocks when the supporting blocks are clamped between the elastic sheets, and is used as a clamping surface for being clamped with the plug after the plug is inserted into the limiting clamping sleeve, so that the structure is simplified, the processing is convenient, and meanwhile, the volume of the limiting clamping sleeve can be reduced.

Further, as shown in fig. 2, the end of the plug 11 is further provided with a guiding surface 111; the inserted link fixing seat 10 is provided with a clamping structure 100 for clamping when the positioned inserted link 1 is installed, the end part of the positioned inserted link 1 is provided with a guide surface so that a plug can be conveniently inserted into a spring card and abrasion between the plug and a spring sheet is reduced, the inserted link fixing seat 10 is provided with the clamping structure so that a clamping tool can be conveniently used for clamping the inserted link when the inserted link is installed for installation, and in the embodiment, the clamping structure 100 is a polygonal structure arranged between the inserted link connecting part and the inserted link fixing seat 10.

Further, the inserted link fixing seat 10 is provided with external threads so as to be in threaded connection with end plates or nut sleeves at two ends of the precast pile.

Example 2

Fig. 13 and 14 show a second embodiment of the mechanical joint with a guiding structure disclosed in the present utility model, which is different from embodiment 1 in that in embodiment 1, two dovetail taper clamping tables are provided on the plug to form a double dovetail taper clamping table, and two dovetail taper clamping grooves are provided on the inner wall of the spring plate to form a double dovetail taper clamping groove; in this embodiment, a dovetail taper clamping table is arranged on the plug to form a single dovetail taper clamping table, and a dovetail taper clamping groove is arranged on the inner wall of the elastic sheet to form a single dovetail taper clamping groove.

Example 3

Fig. 15 and 16 show a third embodiment of the mechanical joint with a guiding structure disclosed in the present utility model, which is different from embodiment 1 in that in embodiment 1, two dovetail taper clamping tables are provided on the plug to form a double dovetail taper clamping table, and two dovetail taper clamping grooves are provided on the inner wall of the spring plate to form a double dovetail taper clamping groove; in this embodiment, a plurality of dovetail taper clamping tables are arranged on the plug to form a plurality of dovetail taper clamping tables, and a plurality of dovetail taper clamping grooves are formed in the inner wall of the elastic sheet to form a plurality of dovetail taper clamping grooves.

Example 4

Referring to fig. 17 and 18, a first embodiment of the precast pile according to the present utility model is shown, which includes a precast pile body 7, a first nut sleeve 50, a second nut sleeve 51, and a mechanical joint having a guide structure according to the present utility model;

the first nut sleeve 50 and the second nut sleeve 51 are respectively arranged at two ends of the precast pile body 7;

one end of the first nut sleeve 50 is fixedly connected with one end of the main rib 70 in the precast pile body 7, and the other end of the first nut sleeve 50 is provided with internal threads to realize the fixed connection with the inserted link fixing seat 10;

one end of the second nut sleeve 51 is fixedly connected with the other end of the main rib 70 in the precast pile body 7, the other end of the second nut sleeve 51 is provided with internal threads, the outer wall of the limiting clamping sleeve body is provided with external threads, the limiting clamping sleeve is arranged in the second nut sleeve, one end of the limiting clamping sleeve, provided with an elastic sheet, is arranged in the second nut sleeve, and the quick connection between two adjacent precast concrete piles is realized through the mechanical joint disclosed by the utility model.

In this embodiment, the main rib 70 may be any one of a screw steel, a PC steel rod, and a steel strand or a composite main rib formed by combining a plurality of main ribs. The screw steel, the PC steel bar and the steel strand can be connected with one end of the nut sleeve through threads, pier heads or steel strand anchor heads respectively. Specifically, the pile main ribs in fig. 17, 19, 20, 21 and 22 are steel strands, PC steel bars, deformed steel bars, composite piles composed of steel strands and deformed steel bars, and composite piles composed of PC steel bars and deformed steel bars, respectively.

Further, structural adhesive 8 is also injected between the connecting end surfaces of two adjacent precast piles and in the mechanical joint with the guiding structure. Specifically, when two piles are mechanically connected, structural adhesive is uniformly coated on the end faces of the precast piles, the structural adhesive is injected into the limiting clamping sleeve, then the two precast piles are mechanically connected through the mechanical connector, after the structural adhesive is solidified, further deformation of parts such as the elastic sheets can be prevented, and therefore the connection performance of the mechanical connector is improved.

Example 5

A second embodiment of the precast pile according to the present utility model is shown in fig. 23 to 26, which includes a precast pile body 7, a first end plate 60, a second end plate 61, and a mechanical joint having a guide structure according to the present utility model;

the first end plate 60 and the second end plate 61 are respectively arranged at two ends of the precast pile body 7;

the first end plate 60 is provided with a first main rib mounting hole 600 and a positioning inserting rod mounting hole 601, the first main rib mounting hole 600 is fixedly connected with one end of a main rib in the precast pile body 7, and the positioning inserting rod 1 is mounted in the positioning inserting rod mounting hole 601;

the second end plate 61 is provided with a second main rib mounting hole 610 and a limiting clamp sleeve mounting hole 611, the second main rib mounting hole 610 is fixedly connected with the other end of the main rib in the precast pile body 7, a limiting clamp sleeve accommodating groove 71 is formed in the precast pile body 7 at a position corresponding to the limiting clamp sleeve mounting hole 611, the limiting clamp sleeve 2 is arranged in the limiting clamp sleeve mounting hole 611, and one end of the limiting clamp sleeve, provided with an elastic sheet, is arranged in the limiting clamp sleeve accommodating groove 71. When two precast piles are connected, the plug is inserted into the limiting clamping sleeve, so that the connection of the two precast piles is realized.

In this embodiment, the main rib 70 may be any one of a screw steel, a PC steel rod, and a steel strand or a composite main rib formed by combining a plurality of main ribs. The screw steel, the PC steel bar and the steel strand can be connected with one end of the nut sleeve through threads, pier heads or steel strand anchor heads respectively.

Further, structural adhesive 8 is also injected between the connecting end surfaces of two adjacent precast piles and in the mechanical joint with the guiding structure. Specifically, when two piles are mechanically connected, structural adhesive is uniformly coated on the end surfaces of the precast piles, the structural adhesive is injected into the limiting clamping sleeve, then the two precast piles are mechanically connected through the mechanical connector, after the structural adhesive is solidified, further deformation of parts such as an elastic sheet and a spring can be prevented, and therefore the connection performance of the mechanical connector is improved.

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 mechanical joint with guiding structure, characterized in that: comprises a positioning inserted link (1) and a limiting clamping sleeve (2);

the positioning inserted link (1) comprises an inserted link fixing seat (10), a plug (11) and a plug connecting part (12) for connecting the inserted link fixing seat (10) and the plug (11);

the plug connecting part (12) comprises a frustum-shaped first connecting part (120) connected with the inserted rod fixing seat (10) and a cylindrical second connecting part (121) connected with the plug (11);

the limiting clamp sleeve (2) comprises a limiting clamp sleeve body (20) and a plurality of elastic sheets (21) which are arranged at one end of the limiting clamp sleeve body (20) and are circumferentially arranged along the limiting clamp sleeve body (20);

the inner wall surface of the limiting cutting sleeve body (20) comprises a first inner wall surface (200) with a conical surface structure and a second inner wall surface (201) with a cylindrical surface structure; the second inner wall surface (201) is close to one side provided with the elastic sheet (21);

when the positioning inserting rod (1) is inserted into the limiting clamping sleeve (2), the second inner wall surface (201) interacts with the second connecting part to guide the positioning inserting rod (1); after the positioning inserting rod (1) is inserted into the limiting clamping sleeve (2), the elastic sheet (21) is clamped with the plug (11).

2. The mechanical joint with guiding structure of claim 1, wherein: the inner diameter of the second inner wall surface (201) is larger than the outer diameter of the second connecting portion (121), and the difference between the inner diameter of the second inner wall surface (201) and the outer diameter of the second connecting portion (121) is 0-0.15mm.

3. A mechanical joint with guiding structure according to claim 1 or 2, characterized in that: the plug (11) is provided with a dovetail taper clamping table (110) to form a single dovetail taper clamping table, and the inner wall of the elastic sheet (21) is provided with a dovetail taper clamping groove (212) to form a single dovetail taper clamping groove;

or the plug (11) is provided with two dovetail taper clamping tables (110) to form a double dovetail taper clamping table, and the inner wall of the elastic sheet (21) is provided with two dovetail taper clamping grooves (212) to form a double dovetail taper clamping groove;

or the plug (11) is provided with a plurality of dovetail taper clamping tables (110) to form a plurality of dovetail taper clamping tables, and the inner wall of the elastic sheet (21) is provided with a plurality of dovetail taper clamping grooves (212) to form a plurality of dovetail taper clamping grooves;

when the plug (11) is inserted into the limiting clamping sleeve (2), the dovetail taper clamping groove (212) is clamped with the dovetail taper clamping table (110).

4. A mechanical joint with guiding structure according to claim 3, characterized in that: when the elastic sheet (21) is in a free state, the diameter of the small diameter end of the dovetail taper clamping groove (212) is smaller than or equal to the diameter of the small diameter end of the dovetail taper clamping table (110).

5. The mechanical joint with guiding structure of claim 4, wherein: the dovetail taper clamping table (110) comprises a plug clamping surface (112) and a plug transition surface (113);

the dovetail taper clamping groove (212) comprises a spring plate clamping surface (211) and a spring plate transition surface (216);

when the positioning inserting rod (1) is inserted into the limiting clamping sleeve (2), the plug clamping surface (112) and the elastic sheet clamping surface (211) are mutually clamped, and a moving gap (23) is formed between the plug transition surface (113) and the elastic sheet transition surface (216).

6. The mechanical joint with guiding structure of claim 5, wherein: the dovetail taper clamping table (110) is provided with teeth, and the plug transition surface (113) is an arc transition surface.

7. A precast pile, characterized in that: comprising a precast pile body (7), a first nut sleeve (50), a second nut sleeve (51), a mechanical joint with guiding structure according to any one of claims 1 to 6;

the first nut sleeve (50) and the second nut sleeve (51) are respectively arranged at two ends of the precast pile body (7);

one end of the first nut sleeve (50) is fixedly connected with one end of a main rib (70) in the precast pile body (7), and the other end of the first nut sleeve is fixedly connected with the inserted link fixing seat (10);

one end of the second nut sleeve (51) is fixedly connected with the other end of the main rib (70) in the precast pile body (7), and the limiting clamping sleeve (2) is arranged in the other end.

8. A precast pile, characterized in that: comprising a precast pile body (7), a first end plate (60), a second end plate (61), a mechanical joint with guiding structure according to any one of claims 1 to 6;

the first end plate (60) and the second end plate (61) are respectively arranged at two ends of the precast pile body (7);

the first end plate (60) is provided with a first main rib mounting hole (600) and a positioning inserting rod mounting hole (601), the first main rib mounting hole (600) is fixedly connected with one end of a main rib (70) in the precast pile body (7), and the positioning inserting rod (1) is arranged in the positioning inserting rod mounting hole (601);

the second end plate (61) is provided with a second main rib mounting hole (610) and a limiting clamping sleeve mounting hole (611), the second main rib mounting hole (610) is fixedly connected with the other end of the main rib (70) in the precast pile body (7), and the limiting clamping sleeve (2) is arranged in the limiting clamping sleeve mounting hole (611).

9. A precast pile as defined in claim 7 or 8, wherein: the main rib is any one or a combination of a plurality of screw steel, PC steel bars and steel strands.

10. A precast pile as defined in claim 9, wherein: structural adhesive is also injected between the connecting end surfaces of two adjacent precast piles and in the mechanical joint with the guiding structure.