A radial-axial bidirectionally adjustable steel bar mechanical connection device and steel bar skeleton

Abstract

The present specification provides a radial-axial bidirectional adjustable steel bar mechanical connection device and a steel bar skeleton, wherein the radial-axial bidirectional adjustable steel bar mechanical connection device comprises: a buckling head, one end of which is open and the other end has a guide head; the buckling sleeve is a cylindrical structure with two ends open, used to accommodate steel bars; a plurality of pairs of limiting protrusions are distributed in a circumferential array on the inner wall of the buckling head and the buckling section of the buckling sleeve, each pair of limiting protrusions includes a first sub-limiting protrusion and a second sub-limiting protrusion, and there is a distance between the first sub-limiting protrusion and the second sub-limiting protrusion, and a steel bar transverse rib accommodating space is formed on the inner wall of the buckling head or the inner wall of the buckling section of the buckling sleeve; the adjustment nut is a cylindrical structure with two ends open; the length of the internal thread of the connecting sleeve is greater than or equal to the length of the external thread of the adjusting nut; when connecting two steel bars, the guide head of the buckling head is accommodated in the adjusting nut, and the adjusting nut is tightly connected to the connecting sleeve. The present invention has the characteristics of simple process and high work efficiency. The steel bar skeleton of the present invention applies the above-mentioned radial-axial bidirectional adjustable steel bar mechanical connection device.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical connection of steel bars, and in particular to a radial-axial bidirectionally adjustable mechanical connection device for steel bars and a steel bar skeleton. Background Art

[0002] Steel bar is one of the main materials used in construction projects. Among them, mechanical connection of steel bars is a connection method that transfers the force in one steel bar to another through the mechanical bite action of the steel bar and the connecting parts or other intervening materials or the pressure bearing action of the end face of the steel bar, thereby achieving the effect of increasing the length of the steel bar.

[0003] The steel skeleton is a combination of steel bars to form a complete grid. The steel skeleton is conducive to restraining concrete and improving the overall performance of concrete components. The use of steel skeletons meets the requirements and trends of industrialized construction of construction projects and will greatly improve the construction efficiency of construction projects. However, after the steel bars are combined and formed into a skeleton, a single steel bar cannot rotate and radial and axial movement is difficult.

[0004] The present application aims to solve the above-mentioned problem and the connection difficulty of such steel bars. Through the adjustment of the radial-axial bidirectional adjustable steel bar mechanical connection device of the present application, the radial and axial deviations after the connection is in place can be effectively eliminated. After the connection, the strength and deformation performance required by national and industry standards can be met, thereby ensuring the quality of the project.

[0005] In the prior art, the connection of steel bars is generally for a single steel bar, and is connected by lap joint, welding, straight thread sleeve or sleeve grouting. Among them, the lap joint requires a long lap length, resulting in steel waste and steel bar congestion; the straight thread sleeve requires the processing of straight threads at the ends of the steel bars, which has the problems of low efficiency, large labor usage and high work intensity, and the ordinary straight thread connection scheme cannot solve the problem of steel bar skeleton connection; when welding is used, high temperature will cause deformation and affect the strength of the steel bar, and the connection quality is difficult to be effectively controlled; the sleeve grouting connection has the problems of large sleeve diameter affecting the thickness of the concrete protective layer, the length of the grouting sleeve affecting the installation of the stirrups, and the connection of multiple steel bars in the same section affecting the bearing capacity of the component. Summary of the invention

[0006] The embodiments of this specification provide a radial-axial bidirectionally adjustable steel bar mechanical connection device and a steel bar skeleton, which have solved the problems of difficult steel bar connection construction and complicated procedures in the prior art.

[0007] To solve the above problems, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides a radial-axial bidirectional adjustable steel bar mechanical connection device, comprising: a crimping head, a crimping sleeve, an adjusting nut, a connecting sleeve and a screw; wherein, one end of the crimping head is open, and the other end is provided with a guide head; the inner diameter of the open end of the crimping head is larger than the diameter of the steel bar; the crimping sleeve is a cylindrical structure with two ends open, one end is a crimping section for accommodating the steel bar, and is mechanically engaged with the steel bar through crimping, and the other end is a threaded section, which is connected to the adjusting nut and the lock nut through the screw; a plurality of pairs of limiting protrusions are distributed in an array on the circumference of the inner wall of the crimping head and the crimping sleeve, and each pair of limiting protrusions is provided with a plurality of pairs of limiting protrusions ... The positioning protrusion includes a first sub-limiting protrusion and a second sub-limiting protrusion, there is a distance between the first sub-limiting protrusion and the second sub-limiting protrusion, and a space for accommodating the cross ribs of the steel bars is formed on the inner wall of the crimping head or the inner wall of the crimping section of the crimping sleeve; the adjusting nut is a cylindrical structure with openings at both ends, a nut is provided at one end of the outer wall, an external thread is provided at the other end of the outer wall, and a full-length internal thread is provided on the inner wall; the length of the internal thread of the connecting sleeve is greater than or equal to the length of the external thread of the adjusting nut; when connecting two steel bars, the guide head of the crimping head is accommodated in the adjusting nut, and the adjusting nut is tightly connected to the connecting sleeve.

[0009] Optionally, the radial-axial bidirectionally adjustable steel bar mechanical connection device also includes: a lock nut, which is a cylindrical structure with openings at both ends, and a full-length internal thread that matches the screw rod is provided on the inner wall of the lock nut. When connecting two steel bars, the lock nut tightens the adjusting nut to prevent the adjusting nut from retreating toward the buckling sleeve.

[0010] Optionally, the outer surface of the lock nut is circular, hexagonal or octagonal.

[0011] Optionally, the crimping head and the crimping sleeve are tightly connected to the steel bars to be connected by crimping.

[0012] Optionally, the connecting sleeve passes through the steel bars to be connected and the buckling head in sequence, and is fastened to the adjusting nut.

[0013] Optionally, a stop portion is provided on the inner wall of the connecting sleeve, and the stop portion is circumferentially arranged along the inner wall of the connecting sleeve to prevent the buckling head from sliding out of the connecting sleeve.

[0014] Optionally, the guide head of the crimping head is arc-shaped.

[0015] Optionally, the tensile strength of the screw rod is higher than the tensile strength of the steel bars to be connected.

[0016] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0017] The radial-axial bidirectional adjustable steel bar mechanical connection device of the present invention connects the steel bars to be connected together through a buckling head and a buckling sleeve, and through multiple pairs of limiting protrusions arranged in the buckling head and the buckling sleeve, the transverse ribs in the steel bars are limited between the limiting protrusion pairs. The buckling sleeve is fastened and connected with the adjustment nut through a screw rod, and the connecting sleeve is fastened and connected with the buckling head to achieve a fastened connection of the steel bars; because the tight connection between the buckling head, the buckling sleeve and the steel bars can be completed in advance, the construction site only needs to fasten the connecting sleeve and the adjusting nut, which reduces the construction process and improves the work efficiency.

[0018] On the other hand, the present invention also provides a steel bar skeleton, comprising a plurality of steel bars and the above-mentioned radial-axial bidirectionally adjustable steel bar mechanical connection device, wherein at least two of the plurality of steel bars are connected by the radial-axial bidirectionally adjustable steel bar mechanical connection device.

[0019] Compared with the prior art, the beneficial effects of the steel bar skeleton provided by the present invention are the same as the beneficial effects of the above-mentioned radial-axial bidirectional adjustable steel bar mechanical connection device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a radial-axial bidirectionally adjustable steel bar mechanical connection device provided in an embodiment of this specification;

[0021] Figure 2 A schematic diagram of the structure of a steel bar skeleton provided in an embodiment of this specification.

[0022] Reference numerals:

[0023] 10. Connecting sleeve, 20. Pressing head, 30. Adjusting nut, 40. Lock nut, 50. Pressing sleeve, 60. Screw. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0025] In the prior art, when connecting steel bars, the steel bars need to be processed with external threads in advance, and during the steel bar thread processing, the steel bars need to be subjected to operations such as upsetting, rib stripping, cutting, and rolling.

[0026] In response to the above technical issues, such as Figure 1As shown, an embodiment of the present invention provides a radial-axial bidirectional adjustable steel bar mechanical connection device, comprising: a crimping head 20, a crimping sleeve 50, an adjusting nut 30, a connecting sleeve 10 and a screw 60; wherein, one end of the crimping head 20 is open, and the other end has a guide head; the inner diameter of the open end of the crimping head 20 is larger than the diameter of the steel bar; the crimping sleeve 50 is a cylindrical structure with two ends open, one end is a crimping section for accommodating the steel bar, and is mechanically engaged with the steel bar by crimping, and the other end is a threaded section, which is connected to the adjusting nut 30 and the lock nut 40 through the screw 60; a plurality of pairs of limit protrusions are distributed in an array on the circumference of the inner wall of the crimping head 20 and the crimping section of the crimping sleeve 50 Each pair of limiting protrusions includes a first sub-limiting protrusion and a second sub-limiting protrusion, there is a distance between the first sub-limiting protrusion and the second sub-limiting protrusion, and a steel bar cross rib accommodating space is formed on the inner wall of the crimping head 20 or the inner wall of the crimping section of the crimping sleeve 50; the adjusting nut 30 is a cylindrical structure with openings at both ends, a nut at one end of the outer wall, an external thread at the other end of the outer wall, and a full-length internal thread on the inner wall; the length of the internal thread of the connecting sleeve 10 is greater than or equal to the length of the external thread of the adjusting nut 30; when connecting two steel bars, the guide head of the crimping head 20 is accommodated in the adjusting nut 30, and the adjusting nut 30 is tightly connected to the connecting sleeve 10.

[0027] It should be noted that one end of the crimping head 20 is open, and the other end has a closed arc-shaped guide head. The open end of the crimping head 20 is used to place the steel bars, and the steel bars are tightly connected to the crimping head 20 through external force. The guide head can ensure that the steel bars carried by the crimping head 20 can enter the inner cavity of the adjusting nut 30 more easily. When the two steel bars are not coaxial, since the guide head is arc-shaped, the coaxiality of the steel bars can be achieved by adjusting the position of the arc-shaped guide head. Of course, the guide head can also be conical. When connecting two steel bars, the apex of the cone is located in the adjusting nut 30. By adjusting the position of the conical guide head, the coaxiality of the steel bars can also be adjusted. When there is a gap between the end faces of the two steel bars, the gap can be eliminated by adjusting the adjusting nut 30 and the guide head of the crimping head 20 to face each other.

[0028] The inner diameter of the crimping head 20 and the crimping sleeve 50 is larger than the diameter of the steel bar, so that the steel bar can be placed in the crimping head 20 and the crimping sleeve 50. The length of the steel bar entering the crimping head 20 and the crimping sleeve 50 is 1.5 to 3.5 times the diameter of the steel bar, and in this embodiment, it is preferably 2.5 times the diameter of the steel bar.

[0029] Since the steel bar generally has transverse ribs, during the process of squeezing the steel bar, the transverse ribs of the steel bar are limited by multiple pairs of limiting protrusions provided on the inner wall of the pressing section of the pressing head 20 and the pressing sleeve 50. Specifically, when the steel bar is pressed by squeezing, there is a certain distance between the first sub-limiting protrusion and the second sub-limiting protrusion, and the distance is related to the specifications of the steel bar to be connected. When the diameter of the steel bar to be connected is large, the distance between the first sub-limiting protrusion and the second sub-limiting protrusion is large; when the diameter of the steel bar to be connected is small, the distance between the first sub-limiting protrusion and the second sub-limiting protrusion is small.

[0030] The adjusting nut 30 is a cylindrical structure with two ends open, a nut is provided at one end of the outer wall, an external thread is provided at the other end of the outer wall, and a full-length internal thread is provided on the inner wall. The length of the internal thread of the connecting sleeve 10 is greater than or equal to the length of the external thread of the adjusting nut 30. The adjusting nut 30 is a nut with a stepped structure, wherein the end with a smaller diameter realizes a fixed connection with the crimping head 20, that is, the inner diameter of this end is the same as the diameter of the guide head, and is used to accommodate the guide head. The end with a larger diameter has a nut, when the connecting sleeve 10 is fixedly connected to the adjusting nut 30 through a thread. When two steel bars are connected, the adjusting nut 30 is tightly connected to the connecting sleeve 10. In order to realize the tight connection between the adjusting nut 30 and the connecting sleeve 10, the length of the internal thread provided on the connecting sleeve 10 is greater than the length of the external thread of the adjusting nut 30. The full-length internal thread of the adjusting nut 30 is used to be tightly connected to the crimping sleeve 50 through a screw 60. The interior of the adjusting nut 30 is provided with a recessed portion adapted to the guide head, and the guide head can rotate 360 ​​degrees in the recessed portion.

[0031] In an optional implementation, the radial-axial bidirectional adjustable steel bar mechanical connection device also includes: a lock nut 40, the inner wall of which is provided with an internal thread that is compatible with the screw 60. When two steel bars are connected, the lock nut 40 tightens the adjustment nut 30 to prevent the adjustment nut 30 from retreating in the direction of the buckling sleeve 50.

[0032] The adjusting nut 30 is further tightened by the lock nut 40 to prevent the adjusting nut 30 from retreating toward the buckling sleeve 50 , thereby further ensuring the tightness of the steel bar connection.

[0033] In an optional embodiment, the outer surface of the lock nut 40 is circular, hexagonal or octagonal.

[0034] In an optional implementation, the crimping head 20 and the crimping sleeve 50 are tightly connected to the steel bars to be connected by crimping.

[0035] In actual application, special crimping equipment is used to crimp the crimping sleeve 50 on the steel bar, and different crimping pressures are applied according to steel bars of different specifications. For example, 12 mm to 18 mm steel bars use 120 tons to 150 tons of special crimping equipment, 18 mm to 25 mm steel bars use 150 tons to 250 tons of special crimping equipment, and 25 mm to 40 mm steel bars use 250 tons to 350 tons of special crimping equipment.

[0036] In an optional implementation, the connecting sleeve 10 passes through the steel bar to be connected and the crimping head 20 in sequence, and is fastened to the adjusting nut 30 .

[0037] When connecting two steel bars, the crimping head 20 is placed in the adjusting nut 30, and the guide head is placed in the inner cavity of the adjusting nut 30, and the position of the guide head is adjusted so that the adjusting nut 30 can be tightly connected to the connecting sleeve 10. At the same time, the screw 60 tightly connects the crimping sleeve 50 to the adjusting nut 30 and is reinforced by the lock nut 40. In order to prevent the crimping head 20 from coming out of the connecting sleeve 10, a stopper is provided on the inner wall of the connecting sleeve 10, which is arranged circumferentially along the inner wall.

[0038] In an optional implementation, the guide head of the crimping head 20 is arc-shaped.

[0039] In order to ensure the coaxiality between the connected steel bars, the guide head is set to an arc shape. When the two steel bars are not coaxial, by adjusting the position of the spherical guide head, the steel bars can be eccentric 360 degrees in the same plane. Of course, the guide head can also be conical. When connecting two steel bars, the apex of the cone is in the adjustment nut 30. By adjusting the position of the conical guide head, the coaxiality of the steel bars can also be adjusted. When there is a gap between the end faces of the two steel bars, the gap can be eliminated by adjusting the adjustment nut 30 and the guide head of the buckling head 20 to face each other.

[0040] In an optional implementation, the tensile strength of the screw rod 60 is higher than the tensile strength of the steel bars to be connected.

[0041] It should be noted that the screw rod 60 can be integrally formed with the pressing sleeve 50 , that is, one end of the pressing sleeve 50 is used to connect with the steel bar, and the other end is a screw rod 60 with external threads connected to the adjusting nut 30 .

[0042] Alternatively, the screw rod 60 and the crimping sleeve 50 are separate. In this case, the screw rod 60 may be a rod-shaped structure with external threads, and may be connected to the crimping sleeve 50 by means of threaded connection or crimping.

[0043] The length of the screw rod 60 can be adjusted according to actual needs to compensate for the axial length deviation of the steel bar. The length deviation ranges from 0 to 100 mm.

[0044] In an optional embodiment, the tensile strength of the screw rod 60 is higher than the tensile strength of the steel bar.

[0045] The radial-axial bidirectional adjustable steel bar mechanical connection device provided by the embodiment of the present invention connects the steel bars to be connected together through the buckling head 20 and the buckling sleeve 50, and sets multiple pairs of limiting protrusions in the buckling sections of the buckling head 20 and the buckling sleeve 50 to limit the transverse ribs in the steel bars between the limiting protrusion pairs. The buckling sleeve 50 is fastened and connected with the adjustment nut 30 through the screw 60, and the connecting sleeve 10 is fastened and connected with the buckling head 20 to achieve the fastening connection of the steel bars; because the tight connection between the buckling head 20, the buckling sleeve 50 and the steel bars can be completed in advance, the construction site only needs to fasten the connecting sleeve 10 and the adjusting nut 30, which reduces the construction process and improves the work efficiency.

[0046] An embodiment of the present invention also provides a steel bar skeleton, comprising a plurality of steel bars and the above-mentioned radial-axial bidirectionally adjustable steel bar mechanical connection device, wherein at least two of the plurality of steel bars are connected by the radial-axial bidirectionally adjustable steel bar mechanical connection device. Figure 2 It is a structural diagram including two steel bar skeletons, wherein the steel bar skeletons can be tied up at a non-construction site. At the construction site, only the connecting sleeve 10 and the adjusting nut 30 need to be tightened and connected in sequence, which greatly reduces the on-site construction time, reduces the difficulty of construction, and improves the work efficiency of the steel bar skeleton installation.

[0047] The biggest feature of the present invention is that it abandons the need to process threads on the ends of the steel bars in the traditional steel bar connection joints. The product adopts an industrialized processing method, which greatly saves labor, reduces labor intensity, and improves the construction efficiency and quality of the steel bar connection project. It has a bidirectional adjustable function of the radial axis, adapts to the working conditions of the radial deviation of the grouped steel bar axis, and takes into account the strength and deformation performance requirements of the steel bar connection joints, fully meeting the requirements of national and industry standards.

[0048] The above describes specific embodiments of this specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily have to be performed in the specific order or continuous order shown to achieve the desired results. The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0049] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0050] The above is only an embodiment of this specification and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A radial and axial bidirectional adjustable steel bar mechanical connection device, characterized in that: include: A crimping head (20), a crimping sleeve (50), an adjusting nut (30), a connecting sleeve (10) and a screw rod (60); in, One end of the crimping head (20) is open, and the other end is provided with a guide head; the inner diameter of the open end of the crimping head (20) is greater than the diameter of the steel bar; The buckling sleeve (50) is a cylindrical structure with two ends open, one end is a buckling section for accommodating steel bars and mechanically engaging with the steel bars through buckling, and the other end is a threaded section connected to the adjusting nut (30) through the screw rod (60); A plurality of pairs of limiting protrusions are distributed in a circumferential array on the inner wall of the crimping head (20) and the crimping section of the crimping sleeve (50), each pair of limiting protrusions comprising a first sub-limiting protrusion and a second sub-limiting protrusion, a distance being provided between the first sub-limiting protrusion and the second sub-limiting protrusion, and a steel bar transverse rib accommodation space is formed on the inner wall of the crimping head (20) or the inner wall of the crimping section of the crimping sleeve (50); The adjusting nut (30) is a cylindrical structure with two ends open, a nut is arranged at one end of the outer wall, an external thread is arranged at the other end of the outer wall, and a full-length internal thread is arranged on the inner wall; The length of the internal thread of the connecting sleeve (10) is greater than or equal to the length of the external thread of the adjusting nut (30); When two steel bars are connected, the guide head of the buckling head (20) is accommodated in the adjusting nut (30), and the adjusting nut (30) is tightly connected to the connecting sleeve (10).

2. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 1 is characterized in that: The radial-axial bidirectionally adjustable steel bar mechanical connection device further comprises: a lock nut (40), The lock nut (40) is a cylindrical structure with openings at both ends, and a full-length internal thread matched with the screw rod (60) is provided on the inner wall. When two steel bars are connected, the lock nut (40) tightens the adjustment nut (30) to prevent the adjustment nut (30) from retreating toward the buckling sleeve (50).

3. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 2 is characterized in that: The outer surface of the lock nut (40) is circular, hexagonal or octagonal.

4. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 1 is characterized in that: The crimping head (20) and the crimping sleeve (50) are tightly connected to the steel bars to be connected by crimping.

5. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 1 is characterized in that: The connecting sleeve (10) passes through the steel bar to be connected and the buckling head (20) in sequence, and is tightly connected to the adjusting nut (30).

6. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 5 is characterized in that: The inner wall of the connecting sleeve (10) is provided with a stop portion, and the stop portion is arranged along the circumference of the inner wall of the connecting sleeve (10) to prevent the buckling head (20) from sliding out of the connecting sleeve (10).

7. The radial-axial bidirectional adjustable steel bar mechanical connection device according to claim 1 is characterized in that: The guide head of the crimping head (20) is in an arc shape.

8. The radial-axial bidirectionally adjustable steel bar mechanical connection device according to any one of claims 1 to 7, characterized in that: The tensile strength of the screw rod (60) is higher than the tensile strength of the steel bars to be connected.

9. A steel reinforcement skeleton, characterized in that: It comprises a plurality of steel bars and the radial-axial bidirectionally adjustable steel bar mechanical connection device as described in any one of claims 1 to 8, wherein at least two of the plurality of steel bars are connected by using the radial-axial bidirectionally adjustable steel bar mechanical connection device.

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