阅读说明：本技术 一种钢棒连接结构 (Steel bar connecting structure ) 是由 顾东东 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种钢棒连接结构,两个钢棒的相近端通过该连接结构实现固定,包括置于基台内的基套,所述基套内依次设置第一调节垫、弹簧、第二调节垫、卡套以及锁止套；所述第二调节垫靠近所述卡套的表面上开设有圆形的限位槽,所述限位槽的外径与所述卡套的外径相同；所述钢棒一端的外壁上设置有一圈凸缘,所述凸缘的最大外径大于所述卡套的内径；本发明能够实现两个钢棒之间的有效连接,进而避免焊接等方式存在的固定缺陷,大大提高了连接强度,并且操作也简单方便。(The invention discloses a steel bar connecting structure, wherein the close ends of two steel bars are fixed through the connecting structure, the steel bar connecting structure comprises a base sleeve arranged in a base station, and a first adjusting pad, a spring, a second adjusting pad, a clamping sleeve and a locking sleeve are sequentially arranged in the base sleeve; a circular limiting groove is formed in the surface, close to the clamping sleeve, of the second adjusting pad, and the outer diameter of the limiting groove is the same as that of the clamping sleeve; a circle of flange is arranged on the outer wall of one end of the steel bar, and the maximum outer diameter of the flange is larger than the inner diameter of the clamping sleeve; the invention can realize effective connection between two steel bars, thereby avoiding the fixation defects existing in welding and other modes, greatly improving the connection strength and having simple and convenient operation.)

1. A steel bar connecting structure is characterized by comprising a base sleeve arranged in a base station, wherein a first adjusting pad, a spring, a second adjusting pad, a clamping sleeve and a locking sleeve are sequentially arranged in the base sleeve;

the inner wall of the base sleeve is of a stepped structure, the first adjusting pad is tightly propped against the stepped part of the base sleeve and is fixed with the end part of a steel bar, two ends of the spring are tightly propped against the first adjusting pad and the second adjusting pad respectively, and the second adjusting pad can freely move in the base sleeve;

the clamping sleeve is positioned between the second adjusting pad and the locking sleeve, the locking sleeve is in threaded connection with the base sleeve, and the clamping sleeve is abutted against the locking sleeve through the second adjusting pad; the clamping sleeve consists of a plurality of arc-shaped sleeves, and the arc-shaped sleeves can be combined into a complete hollow cylinder; the surfaces of the clamping sleeve and the locking sleeve which are close to each other are inclined surfaces, and the inclination angle of the inclined surface of the clamping sleeve is larger than that of the inclined surface of the locking sleeve;

a circular limiting groove is formed in the surface, close to the clamping sleeve, of the second adjusting pad, and the outer diameter of the limiting groove is the same as that of the clamping sleeve;

a circle of flange is arranged on the outer wall of one end of the steel bar, and the maximum outer diameter of the flange is larger than the inner diameter of the clamping sleeve;

when one end of the steel bar with the flange penetrates into the cutting sleeve, the cutting sleeve at least has a first position and a second position; when the cutting sleeve is located at the first position, the cutting sleeve abuts against the inclined surface of the locking sleeve, and the cutting sleeve is located outside the limiting groove; when the cutting sleeve is located at the second position, the cutting sleeve abuts against the inclined surface of the locking sleeve, the cutting sleeve is located in the limiting groove, the inner wall of the cutting sleeve abuts against the steel bar, and the maximum outer diameter of the flange is located outside the cutting sleeve.

2. A steel bar connecting structure as claimed in claim 1, wherein a connecting body is further provided in the base sleeve, one end of the connecting body is fixed to the steel bar on the first adjusting pad, and the other end of the connecting body is inserted into the steel bar inserted into the sleeve.

3. A steel bar connecting structure as claimed in claim 2, wherein one end of the steel bar having the flange is provided with a first blind hole for the connector to be inserted into, the outer diameter of the connector is the same as the inner diameter of the first blind hole, and the other end of the steel bar is provided with a second blind hole for the connector to be fixed;

a circle of ring grooves are formed in the inner wall of the first blind hole, convex rings matched with the ring grooves are arranged on the outer wall of the corresponding connecting body, a plurality of notches which are uniformly distributed along the circumferential direction are formed in the circumferential side of the first blind hole, and the notches extend to the bottom of the first blind hole; when the cutting sleeve is at the second position, the convex ring is tightly propped in the ring groove.

4. A steel bar connecting structure according to claim 3, wherein said connecting body is threadedly connected to said second blind hole, and said ring groove is located at the center of said blind hole.

5. A steel rod connecting structure according to claim 2, wherein a support ring is further provided in the base sleeve, the support ring being nested on the connecting body;

when one end of the steel bar with the flange does not penetrate into the locking sleeve, the outer wall of the support ring abuts against the inner wall of the clamping sleeve, the clamping sleeve is located outside the limiting groove, and the clamping sleeve abuts against the inclined surface of the locking sleeve; when one end of the steel bar with the flange penetrates into the locking sleeve and the clamping sleeve is in the second position, the support ring is positioned outside the clamping sleeve.

6. A steel rod connecting structure according to claim 5, wherein said support ring is an interference fit with said connecting body.

7. A steel rod connecting structure according to claim 1, wherein an anti-corrosion glue is poured into the base sleeve.

Technical Field

The invention relates to the technical field of precast piles, in particular to a steel bar connecting structure.

Background

With the continuous development of fabricated buildings, prefabricated components such as prefabricated concrete plates, concrete piles and the like are widely used; for the precast pile, in the actual use process, the connection between the pile and the pile is often damaged, and if the strength is not enough, the pile is easy to break, for example, when the welding mode is adopted, the pile is easy to break at the welding position due to other factors, such as welding defects, corrosion and the like.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a steel bar connecting structure which can realize effective connection between two steel bars, further avoid the fixing defects in welding and other modes, greatly improve the connecting strength and is simple and convenient to operate.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a steel bar connecting structure, wherein the close ends of two steel bars are fixed through the connecting structure, the steel bar connecting structure comprises a base sleeve arranged in a base station, and a first adjusting pad, a spring, a second adjusting pad, a clamping sleeve and a locking sleeve are sequentially arranged in the base sleeve;

the inner wall of the base sleeve is of a stepped structure, the first adjusting pad is tightly propped against the stepped part of the base sleeve and is fixed with the end part of a steel bar, two ends of the spring are tightly propped against the first adjusting pad and the second adjusting pad respectively, and the second adjusting pad can freely move in the base sleeve;

the clamping sleeve is positioned between the second adjusting pad and the locking sleeve, the locking sleeve is in threaded connection with the base sleeve, and the clamping sleeve is abutted against the locking sleeve through the second adjusting pad; the clamping sleeve consists of a plurality of arc-shaped sleeves, and the arc-shaped sleeves can be combined into a complete hollow cylinder; the surfaces of the clamping sleeve and the locking sleeve which are close to each other are inclined surfaces, and the inclination angle of the inclined surface of the clamping sleeve is larger than that of the inclined surface of the locking sleeve;

a circular limiting groove is formed in the surface, close to the clamping sleeve, of the second adjusting pad, and the outer diameter of the limiting groove is the same as that of the clamping sleeve;

a circle of flange is arranged on the outer wall of one end of the steel bar, and the maximum outer diameter of the flange is larger than the inner diameter of the clamping sleeve;

when one end of the steel bar with the flange penetrates into the cutting sleeve, the cutting sleeve at least has a first position and a second position; when the cutting sleeve is located at the first position, the cutting sleeve abuts against the inclined surface of the locking sleeve, and the cutting sleeve is located outside the limiting groove; when the cutting sleeve is located at the second position, the cutting sleeve abuts against the inclined surface of the locking sleeve, the cutting sleeve is located in the limiting groove, the inner wall of the cutting sleeve abuts against the steel bar, and the maximum outer diameter of the flange is located outside the cutting sleeve.

Preferably, a connecting body is further arranged in the base sleeve, one end of the connecting body is fixed with the steel bar on the first adjusting pad, and the other end of the connecting body is inserted into the steel bar penetrating into the clamping sleeve.

Preferably, one end of the steel bar, which is provided with the flange, is provided with a first blind hole into which the connecting body is inserted, the outer diameter of the connecting body is the same as the inner diameter of the first blind hole, and the other end of the steel bar is provided with a second blind hole into which the connecting body is fixed;

a circle of ring grooves are formed in the inner wall of the first blind hole, convex rings matched with the ring grooves are arranged on the outer wall of the corresponding connecting body, a plurality of notches which are uniformly distributed along the circumferential direction are formed in the circumferential side of the first blind hole, and the notches extend to the bottom of the first blind hole; when the cutting sleeve is at the second position, the convex ring is tightly propped in the ring groove.

Preferably, the connecting body is in threaded connection with the second blind hole, and the annular groove is located in the middle of the blind hole.

Preferably, a support ring is further arranged in the base sleeve, and the support ring is nested on the connecting body;

when one end of the steel bar with the flange does not penetrate into the locking sleeve, the outer wall of the support ring abuts against the inner wall of the clamping sleeve, the clamping sleeve is located outside the limiting groove, and the clamping sleeve abuts against the inclined surface of the locking sleeve; when one end of the steel bar with the flange penetrates into the locking sleeve and the clamping sleeve is in the second position, the support ring is positioned outside the clamping sleeve.

Preferably, the support ring is an interference fit with the connector.

Preferably, the base sleeve is internally poured with an anti-corrosion glue.

The invention has the beneficial effects that:

according to the invention, through the interaction among the parts such as the locking sleeve, the clamping sleeve and the adjusting pad, the two steel bars can be spliced in the base sleeve and effectively connected, so that the two steel bars can be spliced only through splicing, the connection requirement is met, and the working strength in later construction is greatly reduced;

meanwhile, by utilizing the interaction among parts such as the locking sleeve, the clamping sleeve, the adjusting pad and the like, after the two steel bars are butted, the radial expansion freedom degree of the clamping sleeve is limited by utilizing the matching of the clamping sleeve and the limiting groove, and further when the steel bars generate an axial displacement trend, the clamping sleeve can limit the trend, so that the two freedom degrees of the two steel bars in the axial direction are limited; meanwhile, the freedom degree of the axis offset of the steel bar can be limited, and the stability of the connection of the steel bar is further realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram (a first position) of a steel bar connection structure according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of a steel bar;

fig. 4 is a schematic structural view of the ferrule;

FIG. 5 is a partial schematic view of a steel bar;

fig. 6 is a schematic structural diagram (a second position) of a steel bar connecting structure according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the abutment and the base sleeve.

Description of reference numerals:

01-base sleeve, 02-base table, 1-locking sleeve, 2-first adjusting pad, 3-second adjusting pad, 4-cutting sleeve, 41-arc sleeve, 5-connector, 6-support ring, 7-spring, 8-steel bar, 81-first blind hole, 811-ring groove, 812-notch, 82-second blind hole and 83-flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1, the present invention provides a steel bar connecting structure, through which the close ends of two steel bars 8 are fixed, and specifically comprises a base sleeve 01 disposed in a base station 02;

the base 02 is made of precast concrete, and as shown in fig. 7, the connecting structures are uniformly distributed in the base in the circumferential direction, or one connecting structure may be separately provided on the base 02, which may be specifically set according to actual conditions.

A first adjusting pad 2, a spring 7, a second adjusting pad 3, a cutting sleeve 4 and a locking sleeve 1 are sequentially arranged in the base sleeve 01;

the inner wall of the base sleeve 01 is of a stepped structure, the first adjusting pad 2 abuts against the stepped part of the base sleeve 01 and is fixed with the end part of one steel bar 8, for example, the first adjusting pad can be fixed through threaded connection, and further the displacement of the first adjusting pad 2 in one axial direction (namely the-z direction in fig. 1) is limited, so that the steel bar 8 is limited in the-z direction; two ends of the spring 7 are respectively abutted against the first adjusting pad 2 and the second adjusting pad 3, and the second adjusting pad 3 can freely move in the base sleeve 01, so that the clamping sleeve 4 can also move to form clamping connection;

the clamping sleeve 4 is positioned between the second adjusting pad 2 and the locking sleeve 1, the locking sleeve 1 is in threaded connection with the base sleeve 01, as shown in fig. 1, when the locking sleeve 1 is in threaded connection with the base sleeve 01, a step is arranged at the joint of the locking sleeve 1 and the base sleeve 01, so that the screwing-in distance of the locking sleeve 1 is limited, and the screwing-in position of the locking sleeve 1 is ensured; the cutting sleeve 4 is tightly propped against the locking sleeve 1 through a second adjusting pad 3;

in order to realize the clamping of the ferrule 4, as shown in fig. 4, the ferrule 4 is composed of a plurality of arc-shaped sleeves 41, that is, the ferrule 4 can be expanded and contracted due to the arrangement of the ferrule 4, and then the locking effect is generated under the action of the spring 7, and the arc-shaped sleeves 41 can be combined into a complete hollow cylinder, that is, the ferrule 4 is a cylinder and then is divided into a plurality of parts; the surfaces of the cutting sleeve 4 close to the locking sleeve 1 are inclined planes (as shown in the thickened part in fig. 2), the inclined angle of the inclined plane of the cutting sleeve 4 is larger than that of the inclined plane of the locking sleeve (as shown in fig. 2), and the cutting sleeve 4 can move radially under the action of the spring 7 due to the arrangement of the inclined planes, so that the steel bar 8 can be locked;

further, in order to ensure the locking, a circular limiting groove is formed in the surface, close to the cutting sleeve 4, of the second adjusting pad 3, and the outer diameter of the limiting groove is the same as that of the cutting sleeve 4; a circle of flange 83 is arranged on the outer wall of one end of the steel bar 8, and the maximum outer diameter of the flange 83 is larger than the inner diameter of the clamping sleeve 4;

when the end of the steel rod 8 with the flange 83 penetrates the ferrule 4, the ferrule 4 has at least a first position and a second position; when the cutting ferrule 4 is at the first position (as shown in fig. 6), the cutting ferrule 4 abuts against the inclined surface of the locking sleeve 1, and the cutting ferrule 4 is located outside the limiting groove; when the cutting sleeve 4 is at the second position (as shown in fig. 1), the cutting sleeve 4 abuts against the inclined surface of the locking sleeve 1, the cutting sleeve 4 is positioned in the limiting groove, the inner wall of the cutting sleeve 4 abuts against the steel bar 8, and the maximum outer diameter of the flange 83 is positioned outside the cutting sleeve 4;

as shown in fig. 1, the cutting ferrule 4 is schematically shown in the second position, the cutting ferrule 4 is located in the limiting groove at this time, and when the upper steel rod 8 wants to be detached, the flange 83 thereon will prop open the cutting ferrule 4, so that the cutting ferrule 4 generates radial displacement, but due to the existence of the limiting groove, the cutting ferrule 4 cannot generate radial displacement, so that the upper steel rod 8 cannot be detached at this time, that is, the + z direction is limited; however, the-z direction is not limited, since the base sleeve 01 is embedded in the concrete, and when the two concrete columns are connected, the two concrete columns are contacted together, so that the-z direction is limited, but considering other factors, such as a gap at the joint, the two concrete columns are further close to each other, and therefore, a connecting body 5 is introduced into the locking sleeve 1, namely:

one end of the connecting body 5 is fixed with the steel bar 8 on the first adjusting pad 2, namely the connecting body 5 is connected with the steel bar 8 at the lower part in the figure 1, and the corresponding steel bar 8 is provided with a second blind hole 82 and is connected in a threaded mode; the other end of the connecting body 5 is inserted on a steel bar 8 penetrating into the clamping sleeve 4; one end of the steel bar 8, which is provided with a flange 83, is provided with a first blind hole 81 for inserting the connecting body 5, the outer diameter of the connecting body 5 is the same as the inner diameter of the first blind hole 81, and the other end of the steel bar 8 is provided with a second blind hole 82 for fixing the connecting body 5; a circle of ring groove 811 is formed on the inner wall of the first blind hole 81, a convex ring matched with the ring groove 811 is arranged on the outer wall of the corresponding connecting body 5, the convex ring is positioned at the end part of the connecting body 5 far away from the first adjusting cushion 2, a plurality of notches 812 (shown in fig. 5) are uniformly distributed along the circumferential direction on the circumferential side of the first blind hole 81, the notches 812 extend to the bottom of the first blind hole 81, the outer wall of the first blind hole 81 can expand and contract due to the notch 812, and the ring groove 811 is positioned in the middle of the first blind hole 81 for improving the expansion and contraction effect; when the cutting sleeve 4 is at the second position, the convex ring is tightly propped in the annular groove 811;

it can be seen that when the upper steel bar 8 further moves in the-z direction, the convex ring at this time is separated from the ring groove 811, and further, the first blind hole 81 is spread, so that the sleeve chuck 4 generates radial displacement, but due to the existence of the limiting groove, the sleeve chuck 4 cannot generate radial displacement, so that the displacement in the-z direction is also limited, that is, finally, the steel bar 8 is limited in two axial directions + z and-z, and the two steel bars 8 are in contact connection through the connecting body 5, so that the offset of the steel bar 8 on the axis is also ensured, and the connection strength is finally ensured;

in order to match the insertion of the steel bar 8 and the position maintenance of the cutting sleeve 4, as shown in fig. 6, a support ring 6 is further arranged in the base sleeve 01, and the support ring 6 is nested on the connecting body 5; when one end of the steel bar 8 with the flange 83 does not penetrate into the locking sleeve 1, the outer wall of the support ring 6 abuts against the inner wall of the clamping sleeve 4, the clamping sleeve 4 is positioned outside the limiting groove, and the clamping sleeve 4 abuts against the inclined surface of the locking sleeve 1; when the end of the steel bar 8 with the flange 83 penetrates into the locking sleeve 1 and the cutting sleeve 4 is in the second position, the support ring 6 is positioned outside the cutting sleeve 4;

namely, the supporting ring 6 is used for ensuring that the cutting sleeve 4 cannot be pushed into the limiting groove in advance, so that the upper steel bar 8 can smoothly enter the cutting sleeve 4, and further, after the supporting ring 6 is pushed off by the upper steel bar 8, the cutting sleeve 4 can be attached to the steel bar 8 and enter the limiting groove to realize clamping; in order to ensure that the cutting sleeve 4 can be well contacted with the support ring 6, the support ring 6 can be made of a magnetic material, so that the cutting sleeve 4 is adsorbed on the periphery of the support ring 6;

for how the support ring 6 hovers over the connecting body 5, an interference fit mode can be adopted to enable the support ring 6 to hover over the connecting body 5, and other modes can also be adopted, for example, an adhesive with low strength is used for fixing, but it should be noted that the force for damaging the sliding of the support ring 6 on the connecting body 5 cannot enable the spring 7 to generate large deformation, namely, when the support ring 6 is pushed away, the spring 7 does not generate deformation or generates slight deformation.

Further, in order to prevent corrosion and oxidation, an anti-corrosive glue, such as epoxy resin, may be poured into the base sleeve 01.

In addition, it should be noted that the connection structure needs to be calculated in size during actual manufacturing, that is, two position diagrams of fig. 1 and 6 need to be satisfied, so that the ferrule 4 can just enter the second position, and the application does not limit the specific size, and in practice, the specific arrangement can be performed with reference to fig. 1 and 6.

When the prefabricated pile is used, firstly, the lower steel bar 8 and the first adjusting pad 2 in the picture 1 are fixed and penetrate into the base sleeve 01 in a prefabricated mode, in order to prevent the first adjusting pad 2 from being separated from the base sleeve 01, the first adjusting pad 2 and the inner wall of the base sleeve 01 can be fixed in a threaded mode, then the base sleeve 01 and the lower steel bar 8 are prefabricated in concrete, and further the lower steel bar 8 and the base sleeve 01 are fixed with the concrete to form the prefabricated pile; then the spring 7 and the second adjusting pad 2 are placed into the base sleeve 01, meanwhile, the connector 5 is fixed on the steel bar 8 below, the support ring 6 is fixed on the connector 5 in advance, then the cutting sleeve 4 is placed in, the cutting sleeve 4 is adsorbed around the support ring 6, further the cutting sleeve 4 is prevented from entering a limiting groove, then the locking sleeve 1 is screwed in, the cutting sleeve 4 is abutted against the inclined plane of the locking sleeve 1, finally the upper steel bar 8 is inserted, the support ring 6 is pushed to move downwards after the steel bar 8 enters, further the limitation of the cutting sleeve 4 is relieved, and therefore the cutting sleeve is radially shrunk and attached to the steel bar 8 under the action of the spring 7 and the inclined plane and enters the limiting groove to achieve locking, the steel bar 8 is effectively connected, the upper steel bar 8 is exposed after connection, and at the moment, subsequent concrete pouring can be carried out; in addition, the upper steel bar 8 can also be prefabricated in the concrete pile in advance, and then the connection of the two concrete piles is realized.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.