CN117721793A - Quick mechanical connection structure and prefab thereof - Google Patents

Abstract

The invention provides a quick mechanical connection structure and a prefabricated member thereof, wherein the quick mechanical connection structure comprises an upper sleeve, a lower sleeve, an inserted link, a middle nut, a connecting piece and an elastic element; one end of the upper sleeve and one end of the lower sleeve are respectively provided with a rib penetrating hole for connecting the main rib; one end of the inserted link is arranged in the upper sleeve; the middle nut is arranged in the lower sleeve, and one end of the elastic element is arranged on the middle nut; the connecting piece is positioned inside the elastic element, and the bottom of the elastic element supports the connecting piece; the other end of the inserted link passes through the middle nut to be clamped with the connecting piece. The invention can realize the butt joint of the upper sleeve and the lower sleeve, realize the mechanical connection of the prefabricated member and the prefabricated member through the upper sleeve, the lower sleeve, the inserted link, the fastener and the elastic element, and avoid welding during field installation.

Description

Quick mechanical connection structure and prefab thereof

Technical Field

The invention relates to the technical field of prefabricated member connection, in particular to a quick mechanical connection structure and a prefabricated pile thereof.

Background

At present, when a pile is spliced, upper and lower section piles are connected by mainly welding end plates at adjacent pile ends. The welding connection mode has high technical level requirements on constructors, is greatly influenced by the external weather and the level difference of on-site constructors, easily causes large quality difference between piles, and is difficult to control the welding quality, so that potential safety hazards exist in the connection structure of the pile head of the precast pile.

In order to solve the quality hidden trouble of field welding construction, mechanical connection is adopted in partial engineering, so that the precast pile is free from welding during field installation, but the requirements of related mechanical connection accessories on the quality of concrete of installers and pile end faces are higher, and even the manufacturing cost of partial mechanical connection is higher than that of welding connection.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides a quick mechanical connection structure, which realizes the mechanical connection of piles through sleeve, inserted link and fastener structures, can avoid welding during field installation and has the characteristics of simple structure, high anti-pulling bearing capacity, low manufacturing cost, high construction efficiency and the like.

The present invention achieves the above technical object by the following means.

A quick mechanical connection structure comprises an upper sleeve, a lower sleeve, an inserted link, a middle nut, a connecting piece and an elastic element; one end of the upper sleeve and one end of the lower sleeve are respectively provided with a rib penetrating hole for connecting the main rib; one end of the inserted link is arranged in the upper sleeve; the middle nut is arranged in the lower sleeve, and one end of the elastic element is arranged on the middle nut; the connecting piece is positioned inside the elastic element, and the bottom of the elastic element supports the connecting piece; the other end of the inserted link passes through the middle nut and is connected with the connecting piece in a clamping way, so that the upper sleeve is in butt joint with the lower sleeve, the prefabricated member and the prefabricated member are mechanically connected through the upper sleeve, the lower sleeve, the inserted link, the fastening piece and the elastic element, and welding can be avoided during field installation.

Further, the elastic element comprises a clamping part, an elastic supporting part and a connecting part, wherein the clamping part is used for being connected to the middle nut; the elastic supporting part comprises a spring body and a bottom bracket; the clamping part is connected with one end of the spring body through the connecting part; the other end of the spring body is provided with the collet, the connecting piece is positioned in the elastic element, and the collet supports one end of the connecting piece, so that the connecting piece is suspended and installed in the lower sleeve through the elastic element, and the influence on the installation quality of the mechanical connecting structure in the installation process due to the existence of sundries such as mud blocks, stone blocks and the like in the lower sleeve can be effectively prevented, thereby ensuring the installation quality of the inserted link; in addition, the elastic supporting part is wrapped outside the connecting piece, and the bottom of the elastic supporting part supports the connecting piece, so that the middle nut and the connecting piece can be tightly combined together, and the middle nut and the connecting piece can be separated when the connecting piece are impacted.

Further, the collet is the plane helix of at least round along the radial inwards extension of spring body other end, can avoid the inserted link tip of inserting the connecting piece on the one hand, and the furthest's weight reduction is in the other hand when satisfying the support connecting piece, and the collet middle part is hollow structure moreover, can even have debris to drop in the elastic element when the prefab butt joint, also can not stay in the collet position, but can drop in the lower sleeve.

Further, the collet is a plane spiral line connecting the other end of the spring body to the circle center of the spring body.

Further, the clamping part is a circle of spring, and one end of the spring is connected with one end of the spring body through the connecting part.

Further, the other end of the spring is provided with a flanging part; the folded edge part is provided with a gap with one end of the spring, so as to be better fixed with the middle nut.

Further, at least 2 lugs are arranged on the clamping part and are used for being connected to the middle nut; the support lugs comprise straight line sections and circular arc sections; the two ends of the arc section are respectively connected with one end of the straight line section, and the other end of the straight line section is connected with the circular ring.

Further, a clamping groove is formed in the outer side of one end of the middle nut, and the clamping part is arranged in the clamping groove; the clamping groove is provided with a notch communicated with the end face of the middle nut, and the connecting part is positioned in the notch.

Further, a clamping groove is formed in the outer side of one end of the middle nut, and the clamping part is arranged in the clamping groove; at least two notches communicated with the end face of the middle nut are arranged on the clamping groove at intervals; the connecting part and the flanging part are respectively positioned in the two notches or each lug is positioned in the two notches.

Further, the inner hole of the connecting piece is provided with a unidirectional latch, and the other end of the plunger rod is provided with a latch matched with the unidirectional latch.

Further, a guide slope is arranged outside one end of the connecting piece, a spigot surface is arranged on the inner side of one end of the middle nut, and the connecting piece is supported through the bottom support, so that the spigot surface is in contact with the guide slope.

Further, the connecting piece comprises two piece at least annular circular arc pieces, the connecting piece outside is equipped with at least round fixed slot, install the retainer plate in the fixed slot for link into an organic whole with a plurality of annular circular arc pieces.

Further, the spring body has a height greater than 2/3 of the total height of the elastic element, and a larger portion of the spring body wraps the connecting piece to prevent the connecting piece from moving radially.

Further, the connecting piece is a split structure formed by at least two annular arc pieces, and the height of the spring body is less than or equal to 2/3 of the total height of the elastic element.

Further, a first inner cavity and a second inner cavity which are communicated with each other are arranged in the lower sleeve, the diameter of the second inner cavity is larger than that of the first inner cavity, and the middle nut is arranged in the first inner cavity; the connecting piece and the elastic element are positioned in the second inner cavity, and can generate radial movement under severe working conditions or extreme assembly conditions, and the second inner cavity provides a movement space for radial movement.

The prefabricated member with the rapid mechanical connection structure comprises a plurality of main ribs, and is characterized in that the main ribs are positioned in the rib penetrating holes of the upper sleeve or the rib penetrating holes of the lower sleeve.

Further, a sheath is arranged on the pile hoop of the prefabricated member, one side surface of the sheath is connected with the pile hoop, and the other side surface of the sheath is arranged on the upper sleeve or the lower sleeve; the other side surface of the sheath is provided with a mounting hole; the end face of the butt joint surface of the upper sleeve or the lower sleeve is provided with a stop opening, and the stop opening is matched with the mounting hole.

Further, the sheath is L-shaped, and the included angle between the two side surfaces of the L-shaped sheath is 85-90 degrees.

The invention has the beneficial effects that:

1. according to the quick mechanical connection structure, the prefabricated member is mechanically connected with the prefabricated member through the upper sleeve, the lower sleeve, the inserted link, the fastening piece and the elastic element, and welding can be avoided during field installation.

2. According to the quick mechanical connecting structure, the connecting piece is suspended and mounted in the lower sleeve through the elastic element, so that the influence on the mounting quality caused by sundries such as mud blocks and stones in the lower sleeve in the mounting process of the mechanical connecting structure can be effectively prevented, and the mounting quality of the inserted link is ensured.

3. According to the quick mechanical connecting structure, the elastic supporting part is wrapped outside the connecting piece, and the connecting piece is supported at the bottom of the elastic supporting part, so that the middle nut and the connecting piece can be tightly combined together, and the middle nut and the connecting piece can be separated when the connecting piece is impacted.

4. According to the quick mechanical connection structure, the first inner cavity and the second inner cavity which are mutually communicated are arranged in the lower sleeve, the diameter of the second inner cavity is larger than that of the first inner cavity, the connecting piece and the elastic element are positioned in the second inner cavity, and when the connecting piece and the elastic element move radially under severe working conditions or under extreme assembly conditions, and the second inner cavity provides a moving space for radial movement.

5. According to the prefabricated member with the rapid mechanical connection structure, the sheath is arranged on the pile hoop of the prefabricated member, one side face of the sheath is connected with the pile hoop, the other side face of the sheath is arranged on the upper sleeve or the lower sleeve, and the end parts of the upper nut and the lower nut are provided with the stop openings, so that the installation holes of the sheath are matched with the stop openings, the pile hoop is ensured to be flush with the concrete end face when the prefabricated pile is produced, and the installation of the joint is prevented from being influenced when the pile hoop is higher than the concrete pile end face.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described, in which the drawings are some embodiments of the invention, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is an assembly view of a quick mechanical connection structure according to the present invention.

Fig. 2 is a three-dimensional view of an elastic element design 1 according to the invention.

Fig. 3 is a three-dimensional view of the design 2 of the elastic element according to the invention.

Fig. 4 is a three-dimensional view of the spring element design 3 according to the invention.

Fig. 5 is a three-dimensional view of the spring element design 4 according to the invention.

Fig. 6 is a three-dimensional view of the spring element design 5 according to the invention.

Fig. 7 is a three-dimensional view of a spring element design 6 according to the present invention.

Fig. 8 is a cross-sectional view of a spring element design 7 according to the invention.

Fig. 9 is a cross-sectional view of an intermediate nut according to the present invention.

Fig. 10 is a left side view of the middle nut design 1 according to the invention.

Fig. 11 is a left side view of the middle nut design 2 of the present invention.

Fig. 12 is a cross-sectional view of a connector according to the present invention.

Fig. 13 is a top view of a connector according to the present invention.

Fig. 14 is a cross-sectional view of a lower sleeve according to the present invention.

FIG. 15 is a schematic view of preform interfacing according to the present invention.

Fig. 16 is a schematic view of the installation of the intermediate nut, the elastic element and the connector according to the present invention.

Fig. 17 is a three-dimensional view of a sheath according to the present invention.

In the figure:

1-an upper sleeve; 2-a lower sleeve; 2-1-a first lumen; 2-2-a second lumen; 3-inserting a rod; 4-an intermediate nut; 4-1-spigot surface; 4-2-clamping grooves; 4-3-slot; a 5-connector; 5-1-guiding slope; 5-2-unidirectional latch teeth; 5-3-fastening rings; 6-an elastic element; 6-1-clamping parts; 6-2-spring body; a 6-3-linkage; 6-4-underwire; 6-5-flanging part; 6-6-supporting lugs; 6-6-1-straight line segments; 6-6-2-arc segments; 7-main tendons; 8-a sheath; 8-1-mounting holes; 9-pile hoops; 10-stop mouth.

Detailed Description

The invention will be further described with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, the quick mechanical connection structure of the present invention comprises an upper sleeve 1, a lower sleeve 2, a plunger 3, an intermediate nut 4, a connecting piece 5 and an elastic element 6; one ends of the upper sleeve 1 and the lower sleeve 2 are respectively provided with a rib penetrating hole for connecting the main rib 7; one end of the inserted link 3 is arranged in the upper sleeve 1; the middle nut 4 is arranged in the lower sleeve 2, and one end of the elastic element 6 is arranged on the middle nut 4; the connecting piece 5 is positioned inside the elastic element 6, and the bottom of the elastic element 6 supports the connecting piece 5 for making the middle nut 4 contact with the connecting piece 5; the other end of the inserted link 3 passes through the middle nut 4 to be clamped with the connecting piece 5, and is used for butting the upper sleeve 1 with the lower sleeve 2. The quick mechanical connection structure realizes the mechanical connection of the prefabricated member and the prefabricated member through the upper sleeve, the lower sleeve, the inserted link, the fastener and the elastic element, and can avoid welding during field installation. Meanwhile, the connecting piece is suspended and installed in the lower sleeve through the elastic element, so that the installation quality is affected when sundries such as mud blocks and stones exist in the lower sleeve in the installation process of the mechanical connecting structure, and the installation quality of the inserted link is ensured.

The design 1 of the elastic element 6 is shown in fig. 2, the elastic element 6 comprises a clamping part 6-1, an elastic supporting part and a connecting part 6-3, and the clamping part 6-1 is used for being connected to the middle nut 4; the elastic supporting part comprises a spring body 6-2 and a bottom bracket 6-4; the spring body 6-2 is a cylindrical tension spring; the upper part of the spring body 6-2 is connected with the clamping part 6-1 through the connecting part 6-3, and the connecting part 6-3 is cylindrical with the same wire diameter as the spring body 6-2. The clamping part 6-1 is a circle of springs, the circle of springs can be regarded as a ring with a fracture, and the outer diameter of the ring with the fracture is not smaller than the outer diameter of the spring body 6-2. One end of the circular ring is connected with the upper part of the spring body 6-2 through a connecting part 6-3. The ring of the fracture can be clamped on the outer surface of the middle nut 4 after being spread by external force. The bottom support 4 is a plane spiral line connecting the lower part of the spring body 2 and the center of the spring body 2. In fig. 2 the planar spiral resembles a planar vortex. The gap smaller than the wire diameter of the spiral wire can be formed between each two spiral wires of the planar spiral wire, and the gap can be formed between each two spiral wires. In fig. 2 it can be seen that the planar spiral closes the lower end face of the spring body 2 completely. The spring body 2 is used for wrapping the outside of the connecting piece, and the collet 4 is used for supporting the connecting piece.

The design 2 of the elastic element 6 is shown in fig. 3, on the basis of the design 1, the other end of the circular ring is provided with a flanging part 6-5, and a gap is formed between the flanging part 6-5 and one end of the circular ring. The folded edge part 6-5 can be perpendicular to the circular ring, and the included angle between the folded edge part 6-5 and the connecting part 6-3 can be an acute angle.

The design 3 of the elastic element 6 is shown in fig. 4, and the bottom support 6-4 is of a semi-closed structure based on the design 1; the bottom support 6-4 is a plane spiral line which extends inwards along the radial direction of the other end of the spring body 6-2 in 3 circles. The radially inward extension is understood to be an extension radially towards the centre of the spring body 6-2 according to fig. 4. The 3-turn planar spiral extending out can support the connection 5. But if the wire diameter of the extended planar spiral is sufficiently large, only 1 turn of spiral may be required to support the connection 5. In fig. 4 it can be seen that the planar spiral closes the lower end face of the spring body 2. On the one hand, the end part of the inserted link 3 inserted into the connecting piece 5 can be avoided, the weight of the other party is reduced to the greatest extent while the connecting piece 5 is supported, in addition, the middle part of the bottom support 6-4 is of a hollow structure, namely a semi-closed structure, and even if sundries fall into the spring body 6-2 during butt joint of prefabricated parts, the sundries cannot stay at the position of the bottom support 6-4 and fall into the lower sleeve 2, so that the influence of the sundries in the elastic supporting part on the butt joint quality can be avoided.

The design 4 of the elastic element 6 is shown in fig. 5, and the bottom support 6-4 is of a semi-closed structure based on the design 2; the bottom support 6-4 is a plane spiral line which extends inwards along the radial direction of the other end of the spring body 6-2 in 3 circles. In fig. 5 it can be seen that the planar spiral closes the lower end face of the spring body 6-2 partially.

The design 5 of the elastic element 6 according to the invention is shown in fig. 6, and on the basis of any one of the designs 1-4, the spring body 6-2 is a conical tension spring, since the outside of the connecting piece 5 is conical.

The design 6 of the elastic element 6 is shown in fig. 7, and on the basis of any one of the designs 1-5, 2 lugs 6-6 are arranged on the circular ring, and the lugs 6-6 are used for being connected to the middle nut 4. The support lugs 6-6 comprise straight line segments 6-6-1 and circular arc segments 6-6-2; two ends of the arc section 6-6-2 are respectively connected with one end of the straight line section 6-6-1, and the other end of the straight line section 6-6-1 is connected with the circular ring. There is no circular ring connecting part between the other ends of the two straight line sections 6-6-1. The lugs 6-6 on the ring may also be a plurality, depending on the diameter of the intermediate nut 4.

According to the invention, as shown in fig. 8, the design 7 of the elastic element 6 is shown in fig. 8, on the basis of any one of the designs 1-7, the outer diameter of the clamping part 6-1 is larger than the outer diameter of the spring body 6-2, the height of the spring body 6-2 is larger than the total height of the elastic element 6 with the height of 2/3, and the spring body 6-2 can wrap the connecting piece in a larger part, so that radial movement of the connecting piece can be prevented.

As shown in fig. 9, a taper hole is formed in the middle nut 4, an annular clamping groove 4-2 is formed in the outer side of one end of the middle nut 4, and the clamping portion 6-1 is installed in the annular clamping groove 4-2. In order to avoid the connecting part 6-3, the clamping groove 4-2 is provided with a notch 4-3 communicated with the end face of the middle nut 4, as shown in fig. 10; the connecting portion 6-3 is located in the notch 4-3.

As shown in fig. 11, in order to install the clamping portion 6-1 with the folded edge portion 6-5 or the clamping portion 6-1 with the supporting lugs 6-6, a clamping groove 4-2 is provided at the outer side of one end of the middle nut 4, and the clamping portion 6-1 is installed in the clamping groove 4-2; at least two notches 4-3 communicated with the end face of the middle nut 4 are arranged on the clamping groove 4-2 at intervals; the connecting part 6-3 and the flanging part 6-5 are respectively positioned in the two notches 4-3 or each lug 6-6 is positioned in the two notches 4-3, and the broken line part in the figure is an installation schematic diagram of the lug 6-6.

As shown in fig. 12 and 13, the inner hole of the connecting piece 5 is provided with a unidirectional latch 5-2, the other end of the plunger rod 3 is provided with a latch matched with the unidirectional latch 5-2, the latch at the other end of the plunger rod 3 can enter the unidirectional latch 5-2 from the insertion direction, but the latch at the other end of the plunger rod 3 cannot be pulled out from the opposite direction. The outer guide slope 5-1 that is equipped with of connecting piece 5 one end, intermediate nut 4 one end inboard is equipped with tang face 4-1, supports connecting piece 5 through collet 4, makes tang face 4-1 and guide slope 5-1 contact.

The connecting piece 5 is composed of at least two annular arc pieces, at least one circle of fixing groove is arranged outside the connecting piece 5, a fastening ring 5-3 is arranged in the fixing groove, and a plurality of annular arc pieces are formed into a complete connecting piece 5 through the fastening ring 5-3 arranged in the fixing groove. The spring body 6-2 has a height of more than 2/3 of the total height of the elastic element 6, and the spring body 6-2 can be used for wrapping the connecting piece 5 in a larger part. The unidirectional latch 5-2 of the inner hole of the connecting piece 5 is an independent latch of a closed ring, and the latch faces downwards.

In another embodiment, the connecting piece 5 is a split structure formed by at least two circular arc pieces, and the height of the spring body 6-2 is less than or equal to 2/3 of the total height of the elastic element 6, that is, a larger gap exists between the clamping portion 6-1 and the connecting portion 6-3, so that the split connecting piece 5 can be placed in the elastic supporting portion through the gap.

One end of the inserted link 3 is provided with threads and is used for being connected with the upper sleeve 1; the other end of the plunger rod 3 is provided with a latch matched with the unidirectional latch 5-2, and each ring of latch is an independent closed ring and faces upwards. The end of the other end of the inserted link 3 is provided with a chamfer, so that the inserted link can be conveniently inserted into a fastener.

As shown in fig. 14, a first inner cavity 2-1 and a second inner cavity 2-2 which are mutually communicated are arranged in the lower sleeve 2, the diameter of the second inner cavity 2-2 is larger than that of the first inner cavity 2-1, and the middle nut 4 is arranged in the first inner cavity 2-1; the connector 5 and the elastic element 6 are located in the second lumen 2-2. In severe conditions or extreme assembly conditions, the connector and the elastic element may move radially, while the second lumen provides a space for radial movement.

As shown in fig. 15, the prefabricated member with the rapid mechanical connection structure according to the present invention includes a plurality of main ribs 7, a plurality of rapid mechanical connection structures are arranged between two abutting prefabricated members, an upper sleeve 1 is embedded in a first prefabricated member, and the main ribs 7 of the first prefabricated member are located in rib penetrating holes of the upper sleeve 1; the lower sleeve 2 is embedded in the second prefabricated member, and the main rib 7 of the second prefabricated member is positioned in a rib penetrating hole of the sleeve 2.

The pile collar 9 of the prefabricated member is provided with a sheath 8, one side surface of the sheath 8 is connected with the pile collar 9, and the other side surface of the sheath 8 is arranged on the upper sleeve 1 or the lower sleeve 2. The sheath 8 may be of unitary construction with the pile casing collar 9.

As shown in fig. 17, the other side surface of the sheath 8 is provided with a mounting hole 8-1; the end face of the butt joint surface of the upper sleeve 1 or the lower sleeve 2 is provided with a stop opening 10, and the mounting hole 8-1 and the stop opening 10 can be in threaded fit or sleeve joint fit. The sheath is L-shaped, and the included angle between two side surfaces of the L-shaped sheath is 85-90 degrees. When the jacket 8 is used for an end-less preform, the stop opening 10 is used for being matched with the jacket 8, so that the upper sleeve 1 or the lower sleeve 2 is prevented from being misplaced with the jacket 8.

The butt joint process of the prefabricated part with the rapid mechanical connection structure comprises the following steps:

s01: placing precast piles with an upper sleeve 1 or a lower sleeve 2, pile sleeves 9 and a sheath 8 in a precast pile finished product stacking place;

s02: constructing the precast pile, enabling the pile head of the first precast pile to be 0.5-1.5 meters away from the ground, and cleaning the surface of the pile head of the first precast pile;

s03: the connecting piece 5 is arranged in the elastic element 6, the elastic element 6 is arranged on the clamping groove of the middle nut 4, and the middle nut 4, the elastic element 6 and the connecting piece 5 are integrated, as shown in fig. 16;

s04: then hanging the second precast pile to a position which is 0.2-0.5 m away from the upper part of the pile head of the first precast pile, and cleaning the surface of the pile head of the second precast pile;

s05: the inserted link 3 is arranged in the upper sleeve 1 of the first precast pile, and the middle nut 4 is arranged in the lower sleeve 2 of the second precast pile;

s06: uniformly coating a sealing material on the pile head surface of the first precast pile;

s07: centering the first precast pile and the second precast pile, aligning the centers of the inserted link 3 and the lower sleeve 2 one by one, and slowly lowering the first precast pile to enable the inserted link 3 to be inserted into the lower sleeve 2 and buckled with the connecting piece 5;

s08: and constructing the connected first precast pile and second precast pile to the elevation of the design requirement, and finally completing the installation and construction of the joint.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (18)

1. The quick mechanical connecting structure is characterized by comprising an upper sleeve (1), a lower sleeve (2), a plug rod (3), a middle nut (4), a connecting piece (5) and an elastic element (6); one end of the upper sleeve (1) and one end of the lower sleeve (2) are respectively provided with a rib penetrating hole for connecting the main rib (7); one end of the inserted link (3) is arranged in the upper sleeve (1); the middle nut (4) is arranged in the lower sleeve (2), and one end of the elastic element (6) is arranged on the middle nut (4); the connecting piece (5) is positioned inside the elastic element (6), and the bottom of the elastic element (6) supports the connecting piece (5); the other end of the inserted link (3) passes through the middle nut (4) to be clamped with the connecting piece (5) for butting the upper sleeve (1) with the lower sleeve (2).

2. The quick mechanical connection according to claim 1, characterized in that the elastic element (6) comprises a clamping portion (6-1), an elastic support portion and a connecting portion (6-3), the clamping portion (6-1) being intended to be connected to the intermediate nut (4); the elastic supporting part comprises a spring body (6-2) and a bottom bracket (6-4); the clamping part (6-1) is connected with one end of the spring body (6-2) through the connecting part (6-3); the other end of the spring body (6-2) is provided with a bottom support (6-4), the connecting piece (5) is positioned in the elastic element (6), and the bottom support (4) supports one end of the connecting piece (5).

3. The quick mechanical connection according to claim 2, characterized in that the shoe (6-4) is at least one turn of a planar spiral extending radially inwards along the other end of the spring body (6-2).

4. The quick mechanical connection structure according to claim 2, wherein the shoe (6-4) is a planar spiral line connecting the other end of the spring body (6-2) to the center of the spring body (6-2).

5. The quick mechanical connection structure according to claim 2, wherein the clamping portion (6-1) is a coil of spring, and one end of the spring is connected with one end of the spring body (6-2) through the connecting portion (6-3).

6. The quick mechanical connection according to claim 5, characterized in that the other end of the spring is provided with a folded portion (6-5); a gap is arranged between the edge folding part (6-5) and one end of the spring.

7. The quick mechanical connection according to claim 5, characterized in that the clamping portion (6-1) is provided with at least 2 lugs (6-6), the lugs (6-6) being adapted to be connected to the intermediate nut (4).

8. The quick mechanical connection structure according to any one of claims 2 to 5, wherein a clamping groove (4-2) is formed on the outer side of one end of the intermediate nut (4), and the clamping part (6-1) is installed in the clamping groove (4-2); the clamping groove (4-2) is provided with a notch (4-3) communicated with the end face of the middle nut (4), and the connecting part (6-3) is positioned in the notch (4-3).

9. The quick mechanical connection structure according to any one of claims 6 to 7, wherein a clamping groove (4-2) is formed on the outer side of one end of the intermediate nut (4), and the clamping part (6-1) is installed in the clamping groove (4-2); at least two notches (4-3) communicated with the end face of the middle nut (4) are arranged on the clamping groove (4-2) at intervals; the connecting part (6-3) and the flanging part (6-5) are respectively positioned in the two notches (4-3) or each lug (6-6) is positioned in the two notches (4-3).

10. The quick mechanical connection structure according to any one of claims 1 to 7, wherein the inner hole of the connecting piece (5) is provided with a unidirectional latch (5-2), and the other end of the plunger (3) is provided with a latch matched with the unidirectional latch (5-2).

11. The quick mechanical connection structure according to claim 10, wherein a guiding slope (5-1) is provided outside one end of the connecting piece (5), a spigot surface (4-1) is provided inside one end of the intermediate nut (4), and the connecting piece (5) is supported by the base (4) so that the spigot surface (4-1) is in contact with the guiding slope (5-1).

12. The quick mechanical connection structure according to claim 10, wherein the connecting piece (5) is composed of at least two annular arc pieces, at least one circle of fixing groove is arranged outside the connecting piece (5), and a fastening ring (5-3) is arranged in the fixing groove and used for connecting a plurality of annular arc pieces into a whole.

13. Quick mechanical connection according to claim 12, characterized in that the spring body (6-2) has a height greater than 2/3 of the total height of the elastic element (6).

14. The quick mechanical connection according to claim 10, characterized in that said connection (5) is a split structure consisting of at least two circular arc pieces, the height of said spring body (6-2) being less than or equal to 2/3 of the total height of the elastic element (6).

15. The quick mechanical connection according to any one of claims 1 to 7, characterized in that said lower sleeve (2) is internally provided with a first internal cavity (2-1) and a second internal cavity (2-2) which are mutually communicated, the diameter of said second internal cavity (2-2) being greater than the diameter of said first internal cavity (2-1), said intermediate nut (4) being mounted inside said first internal cavity (2-1); the connecting piece (5) and the elastic element (6) are positioned in the second inner cavity (2-2).

16. Preform with a quick mechanical connection according to any of claims 1-15, comprising several main bars (7), characterized in that the main bars (7) are located in the bar-passing holes of the upper sleeve (1) or in the bar-passing holes of the lower sleeve (2).

17. Preform according to claim 15, characterized in that a sheath (8) is mounted on the pile casing collar (9) of the preform, one side of the sheath (8) being connected to the pile casing collar (9), the other side of the sheath (8) being mounted on the upper sleeve (1) or the lower sleeve (2); the other side surface of the sheath (8) is provided with a mounting hole (8-1); the end face of the butt joint surface of the upper sleeve (1) or the lower sleeve (2) is provided with a stop opening (10), and the stop opening (10) is matched with the mounting hole (8-1).

18. Preform according to claim 17, wherein the sheath is L-shaped, the angle between the sides of the L-shaped sheath being 85-90 °.