CN220977978U - Seamless connecting piece - Google Patents

Abstract

The utility model relates to a seamless connection, comprising: a small sleeve; a first internal thread is formed in the inner part of the sleeve; the large sleeve is internally provided with an inserting cavity, and an internal thread is formed in the inserting cavity near one end of the small sleeve; the axial end of the inserted link is provided with an external thread connecting end which is in threaded connection with the small sleeve, and the other end of the inserted link forms an inserted end which can extend into the inserted cavity; the middle sleeve is provided with an external thread in threaded connection with the internal thread of the large sleeve and axially abuts against the small sleeve; the elastic part is arranged in the large sleeve and used for locking the plug-in end; the elastic abutting piece is assembled with the elastic part in a matching way and is arranged in the limit sleeve; the limit sleeve is in fit and clamping connection with the middle sleeve; is internally arranged in the large sleeve; the utility model has simple structure, improves the middle sleeve and the limit sleeve, can simplify assembly, reduces cost, is a preassembled piece and is convenient to manage.

Description

Seamless connecting piece

Technical Field

The utility model relates to the technical field of buildings, in particular to a seamless connecting piece.

Background

The middle sleeve of former seamless connecting piece is the multistage screw thread, and the preparation degree of difficulty is big, and the installation is loaded down with trivial details, and the circumstances that the screw thread is not hard up can appear in the multistage screw thread, influences the stability of connecting piece. Meanwhile, the bottom of the existing limiting sleeve is of a hollow structure, after the limiting sleeve is installed in the large sleeve, sealing materials are filled into the limiting sleeve, inconvenience is brought to subsequent assembly, assembly efficiency is affected, in addition, the existing sleeve is mostly combined with the prestressed steel rod pier head, and the pile body quality is affected due to the fact that the pier head precision is low and the prestressed steel rod is different in length.

In view of the above, improvements are needed.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art, and provides the seamless connecting piece which has the advantages of simple structure, reasonable design, stable connection and improvement of pile body quality.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a seamless connection comprising: a small sleeve; a first internal thread is formed in the inner part of the sleeve; the large sleeve is internally provided with an inserting cavity, and an internal thread is formed in the inserting cavity near one end of the small sleeve; the plug rod is provided with an external thread connecting end which is in threaded connection with the first internal thread of the small sleeve at one axial end, and a plug end which can extend into the plug cavity is formed at the other axial end; the middle sleeve is provided with an external thread in threaded connection with the internal thread of the large sleeve and axially abuts against the small sleeve; the elastic part is arranged in the large sleeve and used for locking the plug-in end; the elastic abutting piece is assembled with the elastic part in a matching way and is arranged in the limit sleeve; the limiting sleeve is of a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve; is arranged in the large sleeve.

As a preferable scheme of the utility model, the elastic part comprises more than two elastic sheets distributed in an annular array, a gap extending along the axial direction is formed between two adjacent elastic sheets, and the elastic part can radially expand or radially contract through the gap.

As a preferable mode of the utility model, the inner peripheral wall of the elastic part is provided with annular saw teeth, the elastic part can be elastically expanded to facilitate the insertion of the inserted rod, and the annular saw teeth can be contracted to enable the annular saw teeth to be abutted against the insertion end.

As a preferred embodiment of the present utility model, the length of the annular serrations increases in sequence along the insertion direction of the insertion end.

As a preferred embodiment of the present utility model, an end of the elastic portion relatively close to the small sleeve is smoothly transited with an inner wall of the intermediate sleeve.

As a preferable mode of the utility model, the inner wall of the middle sleeve is provided with a cone frustum which gradually expands along the inserting direction, and the outer wall of the elastic part is provided with an annular inclined surface matched with the cone frustum; the insertion end can extend into the elastic part along the insertion direction through the middle sleeve, and the elastic part can elastically hold the insertion end tightly.

As a preferable scheme of the utility model, the insertion end of the insertion rod is provided with a chamfer, the elastic part further comprises a guide inclined plane, the guide inclined plane is positioned at one end of the elastic part relatively close to the middle sleeve, and the chamfer is used for abutting against the guide inclined plane and guiding the elastic part to radially expand.

As a preferable mode of the utility model, a plurality of notches are formed at one end of the elastic part far away from the inclined surface, and the notches and the gaps are distributed in a staggered way.

As a preferred embodiment of the utility model, the gap corresponds to the length of the gap.

As a preferable scheme of the utility model, the middle sleeve comprises a first connecting section and a second connecting section which are connected with each other, the first connecting section is positioned on one side of the second connecting section, which is relatively close to the small sleeve, an external thread is formed on the first connecting section, the external thread of the first connecting section is connected with the large sleeve, and the second connecting section is connected with the limit sleeve.

As a preferred aspect of the present utility model, the second connecting section is located inside the limit sleeve; the radial dimension of the outer peripheral wall of the second connecting section is matched with the radial dimension of the inner peripheral wall of the limit sleeve.

A seamless connection comprising: a small sleeve; a first internal thread is formed in the inner part of the sleeve; the device is provided with a first connecting cavity and a second connecting cavity, a first partition plate is formed between the first connecting cavity and the second connecting cavity, and a first prestress steel rod is screwed in the first connecting cavity; the large sleeve is provided with a third connecting cavity and an inserting cavity; an internal thread is formed in the insertion cavity near one end of the small sleeve; a second partition plate is formed between the third connecting cavity and the inserting cavity, and a second prestress steel rod is screwed in the third connecting cavity; the plug rod is provided with an external thread connecting end which is in threaded connection with the first internal thread of the small sleeve at one axial end, and a plug end which can extend into the plug cavity is formed at the other axial end; the middle sleeve is provided with an external thread in threaded connection with the internal thread of the large sleeve and axially abuts against the small sleeve; the elastic part is arranged in the large sleeve and used for locking the plug-in end; the elastic abutting piece is assembled with the elastic part in a matching way and is arranged in the limit sleeve; the limiting sleeve is of a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve; is arranged in the large sleeve.

As a preferable mode of the utility model, the elastic abutting piece comprises a cowhells pad or an elastic ring; the cowhells pad or spring ring sets up in spacing sleeve.

As a preferable scheme of the utility model, the cowhells pad is provided with an annular groove matched with the elastic part, and one end of the elastic part, which is close to the notch, is inserted into the annular groove for assembling the elastic part to the cowhells pad.

As a preferred embodiment of the present utility model, the elastic ring is located between the elastic portion and the limit sleeve, and the elastic ring is configured to cause the elastic portion to have a tendency to move reversely in the insertion direction.

As a preferable scheme of the utility model, the elastic part is provided with an oil seal close to the opening of the middle sleeve, and the periphery of the oil seal is positioned at the joint of the middle sleeve and the limiting sleeve.

As a preferable scheme of the utility model, the oil seal is nitrile rubber, fluororubber, silicon rubber, acrylic rubber, polyurethane or polytetrafluoroethylene.

The beneficial effects of the utility model are as follows:

1. the utility model has simple structure, improves the middle sleeve and the limit sleeve, can simplify assembly, reduces cost, is a preassembled piece and is convenient to manage.

2. The utility model has ingenious design, and the improvement on the large sleeve, the small sleeve and the prestressed steel bar can effectively improve the assembly precision and the product quality.

3. The seamless connecting piece provided by the utility model is simple to process, convenient to assemble, reliable in connection strength, capable of effectively reducing construction cost and good in economic benefit when used in engineering.

4. The bottom of the limit sleeve is sealed, namely, the limit sleeve is of a barrel-shaped structure with only one opening at the upper part, the bottom of the limit sleeve of the seamless connecting piece in the prior art is hollowed, and openings are formed at the upper part and the lower part.

Drawings

FIG. 1 is a schematic view of a seamless connection member according to a first embodiment of the present utility model;

FIG. 2 is a front view of a seamless connection according to a first embodiment of the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 2 in accordance with one embodiment of the present utility model;

FIG. 4 is a schematic view of an intermediate sleeve according to a first embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of the elastic portion according to the first embodiment of the present utility model;

FIG. 6 is a schematic diagram of a structure of a tendon cushion according to a first embodiment of the present utility model;

FIG. 7 is an exploded view of a seamless connection according to a first embodiment of the present utility model;

FIG. 8 is a front view of a stop sleeve coupled to an intermediate sleeve in accordance with one embodiment of the present utility model;

FIG. 9 is a cross-sectional view B-B of FIG. 8 in accordance with one embodiment of the present utility model;

FIG. 10 is a schematic structural view of a seamless connection member according to a second embodiment of the present utility model;

FIG. 11 is a front view of a seamless connection according to a second embodiment of the present utility model;

FIG. 12 is a cross-sectional view of FIG. 11 in a second embodiment of the utility model;

FIG. 13 is a schematic view (I) of a small sleeve in a second embodiment of the present utility model;

FIG. 14 is a schematic view (II) of a small sleeve in a second embodiment of the present utility model;

FIG. 15 is a schematic view (I) of a large sleeve according to a second embodiment of the present utility model;

FIG. 16 is a schematic view of a second embodiment of a large sleeve according to the present utility model;

FIG. 17 is a front view of a seamless connection in accordance with a third embodiment of the present utility model;

FIG. 18 is a D-D sectional view of FIG. 17 in a third embodiment of the utility model;

FIG. 19 is an exploded view of a seamless connection in accordance with a third embodiment of the present utility model;

FIG. 20 is a front view of a fourth embodiment of the present utility model showing the connection of an intermediate sleeve to a stop sleeve;

FIG. 21 is a cross-sectional E-E view of FIG. 20 in a fourth embodiment of the utility model;

FIG. 22 is a schematic diagram illustrating the connection between the elastic portion and the oil seal in the fourth embodiment of the present utility model;

FIG. 23 is a schematic view showing the structure of an elastic portion in a fifth embodiment of the present utility model;

Reference numerals illustrate: the device comprises a first prestress steel rod 1, a small sleeve 2, a plunger 3, a middle sleeve 4, an elastic part 5, an elastic abutting piece 6, a limit sleeve 7, a large sleeve 8, a second prestress steel rod 9, a first internal thread 10, a first connecting cavity 21, a second connecting cavity 22, a first partition 23, an external thread connecting end 31, a plug-in end 32, a chamfer 32-1, an external thread 40, a cone frustum 41, a first connecting section 43, a second connecting section 44, a spring piece 50, a gap 51, an annular inclined surface 52, an annular sawtooth 53, a notch 54, a guide inclined surface 55, an oil seal 56, an opening 57, a beef tendon cushion 60, a spring ring 61, an annular groove 62, an internal thread 80, a third connecting cavity 81, a second partition 82 and a seamless connecting piece 100.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 utility model will be understood in specific cases by those of ordinary skill in the art.

In the current building technical field, in order to facilitate the convenience of processing and construction, the total length of precast piles is generally increased by adopting a mode of mutually splicing reinforced concrete precast piles. In order to enable rapid and firm splicing between two reinforced concrete precast piles, the prior art generally adopts a connecting assembly to connect the reinforcing bars inside the two reinforced concrete precast piles. However, when a plurality of existing coupling assembling are together docked, easily produce the phenomenon that the butt joint is unsmooth or some coupling assembling misplaces, be difficult to guarantee connection efficiency and joint strength, moreover, the intermediate sleeve of former seamless connecting piece is the multistage screw thread, and the preparation degree of difficulty is big, and the installation is loaded down with trivial details, and the circumstances that the screw thread is not hard up can appear in the multistage screw thread, influences the stability of connecting piece.

Embodiment one:

Based on this, referring to fig. 1, fig. 1 shows a schematic perspective view of a seamless connection member according to a first embodiment of the present utility model; the present utility model provides a seamless connection 100, which is applied to connect two engineering parts, and in this embodiment, the seamless connection 100 achieves the assembly lengthening between two precast piles (not shown) by connecting the reinforcing bars in different reinforced concrete precast piles. It is understood that in other embodiments, the seamless connection 100 may also find application in other engineering areas, such as fabricated constructions, poured concrete, and the like.

Referring to fig. 1 again and fig. 2 to 7 together, fig. 2 is a front view of a seamless connection member according to a first embodiment of the present utility model; FIG. 3 is a cross-sectional view A-A of FIG. 2 in accordance with one embodiment of the present utility model; FIG. 4 is a schematic view of an intermediate sleeve according to a first embodiment of the present utility model; FIG. 5 is a schematic view of the structure of the elastic portion according to the first embodiment of the present utility model; FIG. 6 is a schematic diagram of a structure of a tendon cushion according to a first embodiment of the present utility model; fig. 7 is an exploded view of a seamless connection according to a first embodiment of the present utility model.

A seamless connection comprising: a small sleeve 2; a first female screw 10 is formed inside thereof; a large sleeve 8, the inside of which is provided with a plug cavity, and an internal thread 80 is formed in the plug cavity near one end of the small sleeve 2; the plug rod 3 is provided with an external thread connecting end 31 which is in threaded connection with the first internal thread 10 of the small sleeve 2 at one axial end, and a plug end 32 which can extend into the plug cavity is formed at the other axial end; the middle sleeve 4 is provided with an external thread 40 which is in threaded connection with the internal thread 80 of the large sleeve 8 and axially abuts against the small sleeve 2; an elastic part 5 which is arranged in the large sleeve 8 and is used for locking the plug end 32; the elastic abutting piece 6 is assembled in a matched manner with the elastic part 5 and is arranged in the limit sleeve 7; a limit sleeve 7 which is a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve 4; is internally arranged in the large sleeve 8; the utility model has simple structure, can simplify assembly and reduce cost by improving the middle sleeve 4 and the limit sleeve 7, is a preassembled piece and is convenient to manage.

Wherein the insertion end 32 can extend into the elastic part 5 along the insertion direction via the intermediate sleeve 4, and the elastic part 5 can elastically hold the insertion end 32; specifically, the upper end of the inserted link 3 is a screw thread and is meshed with the inner thread of the small sleeve 2, the lower end is an inserted end 32 which is slightly smaller than the large-diameter inner hole of the middle sleeve 4, and the lowest end of the inserted end 32 is a round angle, so that the inserted link is smoother to enter the meshed middle sleeve 4.

Specifically, when two precast piles (not shown) are connected, two ends of the inserted link 3 are respectively connected with the small sleeve 2 and the middle sleeve 4, and then one end of the small sleeve 2, which is relatively far away from the inserted link 3, is assembled on a reinforcing steel bar or pier head at the end part of one precast pile; furthermore, the middle sleeve 4 is assembled in the large sleeve 8, the large sleeve 8 is assembled and fixed on a reinforcing steel bar or a upsetting head at the end part of another precast pile, and the end parts of the two precast piles provided with the partial seamless connecting pieces are butted, so that the quick connection between the two precast piles can be realized, and the lengthening of a pile body is realized; the present embodiment is not limited to the connection of two precast piles, and other similar members can be used.

It will be appreciated that the specific assembly sequence is not limited, as long as the small sleeve 2 and the insert rod can be assembled to the end of one of the precast piles, the middle sleeve 4 and the large sleeve 8 are correspondingly assembled to the corresponding positions of the other precast pile, and after the two precast piles are abutted, the elastic portion 5 can be effectively clamped against one end of the middle sleeve 4 relatively far from the small sleeve 2.

Referring to fig. 1 and fig. 4 again, further, in one embodiment, the outer side of the middle sleeve 4 is formed with an external thread 40, specifically, the external thread 40 is M27 x 2 or M30 x 2 threads, the external thread 40 of the middle sleeve 4 is connected with the internal thread 80 of the large sleeve 8, the threaded connection reliability is sufficient, the assembly is convenient, and the processing cost is low; the middle sleeve 4 is hollow, the upper end of the inner part is regular octagon, the assembly is convenient, and the middle of the middle sleeve 4 is of a cylindrical structure.

Referring to fig. 5 again, in one embodiment of the present utility model, the elastic portion 5 is provided with an opening 57 extending along the axial direction, the elastic portion 5 includes more than two elastic sheets 50 distributed in an annular array, and a gap 51 is formed between two adjacent elastic sheets 50; the gaps 51 between the elastic pieces 50 can provide deformation space for the elastic contraction and the elastic expansion of each elastic piece 50 of the elastic part 5, reduce the installation difficulty and avoid the damage of the elastic pieces 50 in the inserting process.

Preferably, in the present embodiment, the elastic portion 5 is provided with 4 elastic pieces 50, and gaps 51 are formed between two adjacent elastic pieces 50, the sizes of the gaps 51 are equal, and the areas of the 4 elastic pieces 50 are the same. It will be appreciated that in other embodiments, the number, area, and size of the gaps 51 of the spring 50 may be set according to the use requirements.

The elastic part 5 is hollow and is provided with annular saw teeth 53 on the inner wall, the elastic part 5 can be elastically expanded to enable the plug-in end 32 of the plug rod 3 to enter, and can be contracted to enable the annular saw teeth 53 to be abutted against the plug-in end 32; the insertion end 32 of the insertion rod 3 can extend into the elastic part 5 along the insertion direction through the middle sleeve 4, and the elastic part 5 can elastically clamp the insertion end 32; when the plunger 3 is subjected to a pulling force in the opposite direction of the insertion direction, the annular serrations 53 of the elastic portion 5 are capable of snap-deforming and embedding the insertion end 32 into the insertion end 32.

By means of the arrangement, the elastic piece 50 of the elastic part 5 can enter the middle sleeve 4 through the elastic shrinkage following the inserted rod 3, the annular saw tooth 53 on the inner peripheral wall of the elastic part 5 is clamped at the inserted end 32, connection reliability between the small sleeve 2 and the large sleeve 8 is effectively guaranteed, on the basis that the elastic part 5 is clamped by the annular saw tooth 53 in the axial direction in a limiting mode, a supporting force can be applied to the inner wall of the middle sleeve 4 in the radial direction through elasticity of the elastic part, the risk of clamping failure between the annular saw tooth 53 and the inserted end 32 is further avoided, and connection reliability of the seamless connecting piece 100 is enhanced; in addition, the seamless connecting piece 100 provided by the utility model has the advantages of simple overall structure and low manufacturing cost, can effectively strengthen the connection strength between precast piles, and has good application prospect and economic benefit.

More specifically, in the embodiment of the present utility model, the annular serrations 53 are annular in structure. So set up for the joint area between annular sawtooth 53 and the grafting end 32 is big, is difficult for fracture inefficacy, and processing is comparatively convenient. It will be appreciated that the annular serrations 53 are not entirely continuous annular teeth due to the gaps 51 between the resilient plates 50 of the resilient portion 5; the annular saw teeth 53 can effectively engage the insertion end 32 of the insertion rod 3, the saw teeth have hardness larger than that of the insertion rod 3, the whole surface of the elastic sheet 50 has higher hardness, and the internal hardness is slightly smaller at HRC 65-70, so that brittleness is reduced.

The elastic part 5 and the plug end 32 are made of 20CrMnTi, and the Rockwell hardness of the plug end 32 is smaller than that of the surface of the elastic part 5; so set up, make things convenient for annular sawtooth 53 to imbed grafting end 32, further accomplish the meshing connection between grafting end 32 outer wall and the elastic component 5 inner wall, the inside hardness of elastic component 5 need not to be unanimous with surface hardness, has reduced the demand to high strength material, is favorable to reducing the required material cost of production elastic component 5 to the probability of component brittle fracture has been reduced.

The insertion end 32 of the insertion rod 3 is provided with a chamfer 32-1, the elastic part 5 further comprises a guide inclined surface 55, the guide inclined surface 55 is positioned at one end of the elastic part 5 relatively close to the middle sleeve 4, and the chamfer 32-1 is used for abutting against the guide inclined surface 55 and guiding the elastic part 5 to radially expand. So set up, chamfer 32-1 butt makes grafting end 32 and elastic part 5 grafting smooth in the guide slope 55, and the smooth elastic part 5 of the smooth edge guide slope 55 of the slip of being convenient for grafting end 32 to go into elastic part 5 to and elastic part 5 steady elasticity expansion.

Further, annular sawtooth 53 is a plurality of, and a plurality of annular sawtooth 53 evenly lay in the inner peripheral wall of elasticity portion 5 along axial direction, so set up, and a plurality of annular sawtooth 53 and grafting end 32 mutually support and can form a plurality of joint faces, increase the joint area between grafting end 32 and the elasticity portion 5, further strengthen the joint strength between little sleeve 2 and big sleeve 8, reduce or avoid seamless connecting piece 100 to appear damaging the risk of inefficacy because of the pulling force is too big.

An annular inclined surface 52 is formed on the side of the elastic part 5 near the middle sleeve 4, and the outer diameter of the inclined surface 52 gradually decreases from outside to inside; the annular inclined surface 52 and the outer peripheral wall of the elastic piece 50 form a smooth transition therebetween. So set up, can make even the periphery wall of elasticity portion 5 whole smoother, the grafting along with inserted bar 3 is more easy gets into middle sleeve 4, effectively improves grafting convenience.

More specifically, the thickness of the annular inclined surface 52 on the elastic portion 5 is also gradually reduced from outside to inside, and the thickness is gradually reduced. So set up, can make the linking between elastic part 5 and the middle sleeve 4 smoother, reduce the atress of elastic part 5 concentrate to with middle sleeve 4 linking department, be convenient for shell fragment 50 more safe and stable carry out elasticity shrink or elasticity expansion.

Referring again to fig. 5, in one embodiment of the present utility model, the annular inclined surface 52 and the outer peripheral wall of the spring plate 50 form a smooth transition therebetween. So set up, the whole processing of the elastic part 5 of being convenient for can guarantee simultaneously that the elastic part 5 is easy to get into middle sleeve 4 along with inserted bar 3, effectively improves grafting convenience, the butt joint in the time of being convenient for a plurality of seamless connecting pieces 100.

Referring again to fig. 4, in one embodiment of the present utility model, the inner wall of the middle sleeve 4 has a truncated cone 41 gradually expanding along the insertion direction, and the outer wall of the elastic portion 5 is provided with an annular inclined surface 52 matching with the truncated cone 41; the insertion end 32 can extend into the elastic part 5 in the insertion direction via the intermediate sleeve 4, and the elastic part 5 can elastically hold the insertion end 32; by the arrangement, the connection between the annular inclined surface 52 of the elastic part 5 and the truncated cone 41 is smoother, the stress of the elastic part 5 is reduced and concentrated to the connection part with the truncated cone 41, and the elastic piece 50 can be conveniently and safely elastically contracted or elastically expanded.

More specifically, the truncated cone 41 matches the inclination angle of the annular inclined surface 52. The truncated cone 41 with the intermediate sleeve 4 inclined in this manner provides a certain guiding function, and the elastic portion 5 can be more sufficiently abutted against the intermediate sleeve 4 along with the insert rod 3 in cooperation with the insert rod 3.

The end of the elastic part 5, which is relatively close to the small sleeve 2, is in smooth transition with the inner wall of the middle sleeve 4. By the arrangement, the insertion end 32 is prevented from being blocked greatly when being inserted into the middle sleeve 4, and meanwhile, stress concentration caused by uneven contact between the insertion end 32 and the middle sleeve 4 and the elastic part 5 can be avoided.

Referring to fig. 5 again, in one embodiment of the present utility model, a plurality of notches 54 are formed at an end of the elastic portion 5 away from the inclined surface 52, and the notches 54 are staggered with the gaps 51; the plurality of notches 54 can provide deformation space for the elastic contraction and the elastic expansion of each elastic sheet 50 of the elastic part 5, reduce the installation difficulty and avoid the damage of the elastic sheet 50 in the inserting process; preferably, in the present embodiment, the elastic portion 5 is provided with 4 notches 54, and the sizes of the adjacent notches 54 are equal, and it is understood that in other embodiments, the number of notches 54 and the size of the gap 51 may be set according to the use requirement.

Specifically, the elastic sheet 50 is provided with a plurality of notches 54, so that the elastic force of the elastic sheet 50 can be reduced, so that no extra large force is needed when the inserting rod 3 is inserted, meanwhile, the assembly with the elastic abutting piece 6 is more convenient, and the assembly efficiency between the elastic abutting piece and the elastic abutting piece is improved, wherein in the facility example, the elastic abutting piece 6 is a cowhells pad 60.

The gap 54 is consistent with the length of the gap 51, so that the elastic force of the elastic sheet 50 can be ensured, and the bearing capacity of the elastic sheet 50 can be enhanced; when the elastic sheet 50 is subjected to pressure or tensile force, the elastic sheet 50 is not easy to break and lose efficacy, so that the reliability of the seamless connecting piece 100 after being connected with the precast piles is effectively improved, and the connection strength between the precast piles is ensured.

The extending directions of the notch 54 and the gap 51 are parallel to the axial direction of the elastic part 5; so configured, the notch 54 extends downward to the side wall of the spring 50, ensuring that the spring 50 can deform sufficiently when elastically expanding or contracting.

It will be appreciated that in other embodiments, the notch 54 may extend downward in any direction, so long as sufficient space is provided at the notch 54 for the elastic portion 5 to elastically deform.

Referring to fig. 6 again, in one embodiment of the present utility model, an annular groove 62 adapted to the elastic portion 5 is formed on the tendon cushion 60, one end of the elastic portion 5 near the notch 54 is inserted into the annular groove 62 for assembling the elastic portion 5 to the tendon cushion 60, wherein the tendon cushion 60 is a hollow circular truncated cone, and the annular groove 62 is located at the outer end of the tendon cushion 60 and can be mounted in cooperation with the elastic sheet 50. The tendon cushion 60 has certain elasticity, can provide a certain displacement for the spring plate 50 when the inserting rod 3 is inserted, and can reset after the inserting rod 3 is completely inserted; the annular groove 62 is used for limiting the connection depth of the elastic part 5 inserted into the cowhells pad 60 near one end of the notch 54. So set up, the mounted position of elastic part 5 can effectively be fixed a position to annular groove 62, avoids the assembly excessively between elastic part 5 and cowhells pad 60, effectively improves assembly precision.

Referring again to fig. 3, 4, 7, 8 and 9, in one embodiment of the present utility model, the limiting sleeve 7 is a barrel-shaped structure with a bottom sealed and an open top; is connected with the middle sleeve 4; is internally arranged in the large sleeve 8; the connection between the limiting sleeve 7 and the middle sleeve 4 may be fixed connection or two may be mutually clamped.

More specifically, the limiting sleeve 7 is a hollow cylinder, the lower end of the limiting sleeve is closed and is matched with the middle sleeve 4, specifically, the middle sleeve 4 comprises a first connecting section 43 and a second connecting section 44 which are connected with each other, the first connecting section 43 is positioned at one side of the second connecting section 44 relatively close to the small sleeve 2, an external thread 40 is formed on the first connecting section 43, the external thread 40 of the first connecting section 43 is connected with the large sleeve 8, and the second connecting section 44 is connected with the limiting sleeve 7; so set up, in the spacing sleeve 7 of elasticity portion 5 ability preload, spacing sleeve 7 and second linkage segment 44 looks adaptation joint are deviate from in order to prevent elasticity portion 5, and elasticity portion 5, elasticity butt spare 6, spacing sleeve 7 can form the preassembly structure with middle sleeve 4 to together install in big sleeve 8 along with middle sleeve 4. The pre-assembled structure is convenient for installing the middle sleeve 4, can simplify the on-site installation step and improves the installation efficiency.

The bottom of the limit sleeve 7 is sealed, namely, the limit sleeve 7 is of a barrel-shaped structure with only one opening at the upper part, the bottom of the limit sleeve of the seamless connecting piece in the prior art is hollowed, and openings are formed at the upper part and the lower part.

The outer diameter of the second connecting section 44 is smaller than the outer diameter of the first connecting section 43, that is, the second connecting section 44 and the first connecting section 43 are in a step-shaped integrated structure, and the second connecting section 44 is embedded in the opening end of the limit sleeve 7; the upper end of the limit sleeve 7 is subjected to ring press deformation, so that the upper end is embedded into the second connecting section 44 of the middle sleeve 4, and the upper end and the second connecting section are in fit clamping connection. In this embodiment, the middle sleeve 4, the limiting sleeve 7, the elastic portion 5 and the tendon cushion 60 are used in combination, and are assembled before leaving the factory.

The second connecting section 44 is located inside the limit sleeve 7; the radial dimension of the outer peripheral wall of the second connecting section 44 is matched with the radial dimension of the inner peripheral wall of the limit sleeve 7. By the arrangement, the gap between the limit sleeve 7 and the peripheral wall of the second connecting section 44 is reduced, and the insert rod is prevented from shaking in the large sleeve 8 when being subjected to horizontal force or bending moment.

More specifically, because the lower end of the limit sleeve 7 is closed, the anti-corrosion solvent can be stored in the limit sleeve 7, so that the corrosion of the joint of the elastic abutting piece 6 and the elastic sheet 50 is prevented, and the service life of the whole device is prolonged.

Preferably, the second connecting section 44 is annular, the middle part of the second connecting section 44 is provided with an inner groove, so that the second connecting section 44 is arranged, the middle sleeve 4 is mechanically rolled by a user when the limiting effect of the second connecting section 44 on the limiting sleeve 7 is not influenced, the middle sleeve 4, the limiting sleeve 7, the elastic part 5 and the beef tendon cushion 60 are preassembled pieces before delivery, the middle sleeve 4 can be connected with the limiting sleeve 7 more conveniently in a labor-saving manner, in other words, the inner groove formed on the second connecting section 44 enables the necking part 42 to be capable of considering the annular compression deformation of the limiting sleeve 7, and limiting the connection degree of the limiting sleeve 7 and the middle sleeve 4 and facilitating the locking of the limiting sleeve 7.

Compared with the prior art, the seamless connecting piece 100 provided by the utility model has the advantages that the elastic part 5 can be elastically expanded to enable the plug end 32 of the plug rod 3 to enter and can be contracted to enable the annular saw teeth 53 to be abutted against the plug end 32; the insertion end 32 of the insertion rod 3 can extend into the elastic part 5 along the insertion direction through the middle sleeve 4, and the elastic part 5 can elastically clamp the insertion end 32; when the inserted link 3 receives a drawing force in the reverse direction of the insertion direction, the annular saw teeth 53 of the elastic part 5 can deform the insertion end 32 in a biting way and are embedded into the insertion end 32 to achieve a quick connection effect, and the seamless connecting piece 100 provided by the utility model enables butt joint between precast concrete piles to be easier, the structure of the elastic part 5 can effectively improve the butt joint smoothness and accuracy and shorten the construction time, and meanwhile, the combination form of the middle sleeve 4, the limit sleeve 7, the elastic part 5 and the tie bar pads 60 can effectively ensure the joint strength between different precast piles.

Embodiment two:

aiming at the current technical field of construction, in order to facilitate the convenience of processing and construction, the total length of the precast pile is generally increased by adopting a mode of mutually splicing reinforced concrete precast piles. In order to enable two reinforced concrete precast piles to be quickly and firmly spliced, the existing sleeve is mostly combined with the prestressed steel bar pier heads, and the condition that the length of the prestressed steel bar is different and the pile body quality is affected due to the fact that the pier heads are low in precision, the seamless connecting piece is provided.

Specifically, a seamless connection includes: a small sleeve 2, the inside of which is formed with a first internal thread 10; the device is provided with a first connecting cavity 21 and a second connecting cavity 22, a first partition plate 23 is formed between the first connecting cavity 21 and the second connecting cavity 22, and a first prestress steel rod 1 is screwed in the first connecting cavity 21; a large sleeve 8 with a third connection cavity 81 and a plug cavity; an internal thread 80 is formed in the insertion cavity near one end of the small sleeve 2; a second partition plate 82 is formed between the third connecting cavity 81 and the inserting cavity, and a second prestress steel rod 9 is screwed in the third connecting cavity 81; the plug rod 3 is provided with an external thread connecting end 31 which is in threaded connection with the first internal thread 10 of the small sleeve 2 at one axial end, and a plug end 32 which can extend into the plug cavity is formed at the other axial end; an intermediate sleeve 4 having an external thread 40 screwed with an internal thread 80 of the large sleeve 8 and axially abutting the small sleeve 2; an elastic part 5 which is arranged in the large sleeve 8 and used for locking the plug-in end 32; the beef tendon cushion 60 is assembled with the elastic part 5 in a matching way and is arranged in the limit sleeve 7; a limit sleeve 7 which is a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve 4; is arranged in the large sleeve 8, wherein the limit sleeve 7 and the middle sleeve 4 can be fixedly connected or clamped with each other.

The insertion end 32 can extend into the elastic part 5 along the insertion direction via the intermediate sleeve 4, and the elastic part 5 can elastically hold the insertion end 32; the elastic part 5 is hollow and is provided with annular saw teeth 53 on the inner wall, the elastic part 5 can be elastically expanded to enable the plug-in end 32 of the plug rod 3 to enter, and can be contracted to enable the annular saw teeth 53 to be abutted against the plug-in end 32; the insertion end 32 of the insertion rod 3 can extend into the elastic part 5 along the insertion direction via the intermediate sleeve 4, and the elastic part 5 can elastically clamp the insertion end 32; when the plunger 3 is subjected to a pulling force in the opposite direction of the insertion direction, the annular serrations 53 of the plunger 3 are able to snap-deform and embed the insertion end 32 into the insertion end 32.

Referring to fig. 10 again, and referring to fig. 11 to 16 together, fig. 10 is a schematic structural diagram of a seamless connection member according to a second embodiment of the present utility model; FIG. 11 is a front view of a seamless connection according to a second embodiment of the present utility model; FIG. 12 is a cross-sectional view of FIG. 11 in a second embodiment of the utility model; FIG. 13 is a schematic view (I) of a small sleeve in a second embodiment of the present utility model; FIG. 14 is a schematic view (II) of a small sleeve in a second embodiment of the present utility model; FIG. 15 is a schematic view (I) of a large sleeve according to a second embodiment of the present utility model; fig. 16 is a schematic structural view (ii) of a large sleeve according to a second embodiment of the present utility model.

Compared with the first embodiment, the second embodiment is characterized in that the structures of the small sleeve 2 and the large sleeve 8 are improved,

Referring to fig. 13 and 14, the small sleeve 2 has a first connecting cavity 21 and a second connecting cavity 22, a first partition 23 is formed between the first connecting cavity 21 and the second connecting cavity 22, a first prestressed steel rod 1 is screwed in the first connecting cavity 21,

Referring to fig. 15 and 16, the large sleeve 8 has a third connecting cavity 81 and a plugging cavity; an internal thread 80 is formed in the insertion cavity near one end of the small sleeve 2; a second partition plate 82 is formed between the third connecting cavity 81 and the inserting cavity, and a second prestress steel rod 9 is screwed in the third connecting cavity 81.

Compared with the small sleeve 2 and the large sleeve 8 in the first embodiment, the sleeve cancels pier head limit, is changed into screw connection, is sealed in the middle, provides limit for screw connection, can effectively improve connection precision and length precision of the prestressed steel rod, has ingenious design, can effectively improve assembly precision by improving the large sleeve and the prestressed steel rod, and improves product quality.

In addition, the seamless connecting piece provided by the application has the advantages that the structure is simple, the seamless connecting piece is not easy to shake, the internal shape of the seamless connecting piece is fixed after the seamless connecting piece is inserted, when the seamless connecting piece is subjected to drawing force, the two building structures are not easy to slide relatively, and the stability of connection is improved.

Other matters in this embodiment refer to embodiment one.

Embodiment III:

referring to fig. 17 to 19, fig. 17 is a front view of a seamless connection member according to a third embodiment of the present utility model; FIG. 18 is a D-D sectional view of FIG. 17 in a third embodiment of the utility model; fig. 19 is an exploded view of a seamless connection in accordance with a third embodiment of the present utility model.

Compared with the first embodiment, the third embodiment is characterized in that: the elastic abutment 6 is a spring ring 61, the spring ring 61 is arranged in the limit sleeve 7, specifically, the spring ring 61 is located between the elastic portion 5 and the limit sleeve 7, and the spring ring 61 is used for enabling the elastic portion 5 to have a trend of moving reversely along the insertion direction.

Referring to fig. 19, a through hole is formed in the middle of the elastic ring 61, so that the elastic ring 61 can push the elastic portion 5 to move along the opposite direction of the insertion direction, so that the annular inclined surface 52 of the elastic portion 5 is further close to the truncated cone 41 of the middle sleeve 4, and when the plugging end 32 receives a pulling force, the truncated cone 41 and the annular inclined surface 52 can be quickly abutted, which is beneficial to reducing the impact of impact load.

Other matters in this embodiment refer to embodiment one or embodiment two.

Embodiment four:

Referring to fig. 20 to 22, fig. 20 is a front view illustrating a connection between an intermediate sleeve and a limiting sleeve in a fourth embodiment of the present utility model; FIG. 21 is a cross-sectional E-E view of FIG. 20 in a fourth embodiment of the utility model; fig. 22 is a schematic diagram illustrating connection between the elastic portion and the oil seal in the fourth embodiment of the present utility model.

In comparison with the implementation one, the fourth embodiment is characterized in that: an oil seal 56 is assembled at the position, close to an opening 57 of the middle sleeve 4, of the elastic part 5, and the periphery of the oil seal 56 is positioned at the joint of the middle sleeve 4 and the limiting sleeve 7; specifically, the upper end of the limit sleeve 7 is subjected to ring press deformation, so that the upper end is embedded into the necking part 42 of the middle sleeve 4, the upper end and the necking part are in fit and clamped, the oil seal 56 is clamped and sealed and locked, the sealing state is kept, sealing oil is filled in the limit sleeve 7, then the oil seal 56 is paved on the guide inclined plane 55 at the opening 57 of the elastic part 5, the oil seal 56 is used for covering the elastic part 5, the overflow of the sealing oil in the limit sleeve 7 is avoided, and the use safety is further ensured, more specifically, the oil seal 56 is one of nitrile rubber, fluororubber, silicone rubber, acrylate rubber, polyurethane or polytetrafluoroethylene.

Other matters in this embodiment refer to embodiment one, embodiment two or embodiment three.

Fifth embodiment:

Fig. 23 is a schematic structural view of an elastic portion in a fifth embodiment of the present utility model.

In comparison with the first embodiment, the fifth embodiment is characterized in that: the gap 54 and the extending direction of the gap 51 have a certain inclination angle with the axial direction of the elastic part 5; so configured, the notch 54 extends downward to the side wall of the spring 50, ensuring that the spring 50 can deform sufficiently when elastically expanding or contracting.

Other matters in this embodiment refer to embodiment one, embodiment two, embodiment three or embodiment four.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more herein: the first prestress steel rod 1, the small sleeve 2, the insert rod 3, the middle sleeve 4, the elastic part 5, the elastic abutting piece 6, the limit sleeve 7, the large sleeve 8, the second prestress steel rod 9, the first internal thread 10, the first connecting cavity 21, the second connecting cavity 22, the first partition 23, the external thread connecting end 31, the inserting end 32, the chamfer 32-1, the external thread 40, the cone frustum 41, the first connecting section 43, the second connecting section 44, the elastic piece 50, the gap 51, the annular inclined surface 52, the annular sawtooth 53, the notch 54, the guide inclined surface 55, the oil seal 56, the opening 57, the beef tendon cushion 60, the elastic ring 61, the annular groove 62, the internal thread 80, the third connecting cavity 81, the second partition 82, the seamless connecting piece 100 and the like, but the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims (17)

1. A seamless connection, characterized in that: comprising the following steps:

A small sleeve (2); a first internal thread (10) is formed inside;

a large sleeve (8) is internally provided with an inserting cavity, and an internal thread (80) is formed in the inserting cavity near one end of the small sleeve (2);

The plug rod (3) is provided with an external thread connecting end (31) which is in threaded connection with the first internal thread (10) of the small sleeve (2) at one axial end, and a plug end (32) which can extend into the plug cavity is formed at the other axial end;

An intermediate sleeve (4) having an external thread (40) screwed with an internal thread (80) of the large sleeve (8) and axially abutting the small sleeve (2);

An elastic part (5) which is arranged in the large sleeve (8) and used for locking the inserting end (32);

The elastic abutting piece (6) is matched and assembled with the elastic part (5) and is arranged in the limit sleeve (7);

The limiting sleeve (7) is of a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve (4); is internally arranged in the large sleeve (8).

2. A seamless connection according to claim 1, wherein: the elastic part (5) comprises more than two elastic pieces (50) distributed in an annular array, a gap (51) extending along the axial direction is formed between two adjacent elastic pieces (50), and the elastic part (5) can radially expand or radially contract through the gap (51).

3. A seamless connection according to claim 2, wherein: the inner peripheral wall of the elastic part (5) is provided with annular saw teeth (53), the elastic part (5) can be elastically expanded to facilitate the insertion of the inserting rod (3), and the annular saw teeth (53) can be contracted to be abutted to the inserting end (32).

4. A seamless connection according to claim 3, wherein: the number of rings of the annular saw teeth (53) increases in sequence along the insertion direction of the insertion end (32).

5. A seamless connection according to claim 1, wherein: one end of the elastic part (5) relatively close to the small sleeve (2) is in smooth transition with the inner wall of the middle sleeve (4).

6. A seamless connection according to claim 5, wherein: the inner wall of the middle sleeve (4) is provided with a cone frustum (41) which gradually expands along the inserting direction, and the outer wall of the elastic part (5) is provided with an annular inclined surface (52) matched with the cone frustum (41); the plug-in end (32) can extend into the elastic part (5) along the insertion direction through the middle sleeve (4), and the elastic part (5) can elastically hold the plug-in end (32).

7. A seamless connection according to claim 1, wherein: the plug-in end (32) of the plug rod (3) is provided with a chamfer (32-1), the elastic part (5) further comprises a guide inclined surface (55), the guide inclined surface (55) is positioned at one end of the elastic part (5) relatively close to the middle sleeve (4), and the chamfer (32-1) is used for abutting against the guide inclined surface (55) and guiding the elastic part (5) to radially expand.

8. A seamless connection according to claim 7, wherein: a plurality of notches (54) are formed at one end of the elastic part (5) far away from the inclined surface (52), and the notches (54) and the gaps (51) are distributed in a staggered mode.

9. A seamless connection according to claim 8, wherein: the gap (54) corresponds to the length of the gap (51).

10. A seamless connection according to claim 9, wherein: the middle sleeve (4) comprises a first connecting section (43) and a second connecting section (44) which are connected with each other, the first connecting section (43) is positioned on one side, relatively close to the small sleeve (2), of the second connecting section (44), an external thread (40) is formed on the first connecting section (43), the external thread (40) of the first connecting section (43) is connected with the large sleeve (8), and the second connecting section (44) is connected with the limit sleeve (7).

11. A seamless connection according to claim 10, wherein: the second connecting section (44) is positioned on the inner side of the limit sleeve (7); the radial dimension of the outer peripheral wall of the second connecting section (44) is matched with the radial dimension of the inner peripheral wall of the limit sleeve (7).

12. A seamless connection, characterized in that: comprising the following steps:

A small sleeve (2); a first internal thread (10) is formed inside;

The connecting device is provided with a first connecting cavity (21) and a second connecting cavity (22), a first partition plate (23) is formed between the first connecting cavity (21) and the second connecting cavity (22), and a first prestress steel bar (1) is screwed in the first connecting cavity (21);

A large sleeve (8) with a third connecting cavity (81) and a plug cavity; an internal thread (80) is formed in the insertion cavity near one end of the small sleeve (2); a second partition board (82) is formed between the third connecting cavity (81) and the inserting cavity, and a second prestress steel rod (9) is screwed in the third connecting cavity (81);

The plug rod (3) is provided with an external thread connecting end (31) which is in threaded connection with the first internal thread (10) of the small sleeve (2) at one axial end, and a plug end (32) which can extend into the plug cavity is formed at the other axial end;

An intermediate sleeve (4) having an external thread (40) screwed with an internal thread (80) of the large sleeve (8) and axially abutting the small sleeve (2);

An elastic part (5) which is arranged in the large sleeve (8) and used for locking the inserting end (32);

The elastic abutting piece (6) is matched and assembled with the elastic part (5) and is arranged in the limit sleeve (7);

The limiting sleeve (7) is of a barrel-shaped structure with a sealed bottom and an open top; is connected with the middle sleeve (4); is internally arranged in the large sleeve (8).

13. A seamless connection according to claim 1 or 12, wherein: the elastic abutting piece (6) comprises a cowhells pad (60) or an elastic ring (61); the cowhells (60) or the elastic ring (61) are arranged in the limit sleeve (7).

14. A seamless connection according to claim 13, wherein: the cowhells pad (60) is formed with an annular groove (62) matched with the elastic part (5), and one end of the elastic part (5) close to the notch (54) is inserted into the annular groove (62) and used for assembling the elastic part (5) onto the cowhells pad (60).

15. A seamless connection according to claim 13, wherein: the elastic ring (61) is located between the elastic part (5) and the limit sleeve (7), and the elastic ring (61) is used for enabling the elastic part (5) to have a trend of moving reversely along the inserting direction.

16. A seamless connection according to claim 13, wherein: an oil seal (56) is assembled at the position, close to an opening (57) of the middle sleeve (4), of the elastic part (5), and the periphery of the oil seal (56) is positioned at the joint of the middle sleeve (4) and the limiting sleeve (7).

17. A seamless connection according to claim 16, wherein: the oil seal (56) is nitrile rubber, fluororubber, silicone rubber, acrylate rubber, polyurethane or polytetrafluoroethylene.