Large-diameter reinforcement cage butt joint device adopting straight thread sleeve for connection and construction method

Abstract

The invention discloses a large-diameter reinforcement cage butt joint device connected through a straight thread sleeve and a construction method.The butt joint device comprises two sets of outer reinforcement positioning hoops, two sets of inner reinforcement positioning hoops and two sets of positioning buckles, and the outer reinforcement positioning hoops and the inner reinforcement positioning hoops are distributed in parallel; an outer hoop positioning hole is formed in the inner side of the steel bar positioning hoop outer hoop, and an inner hoop positioning hole is formed in the outer side of the steel bar positioning hoop inner hoop. The two sets of steel bar positioning hoop inner hoops and the two sets of steel bar positioning hoop outer hoops are positioned and combined through the multiple sets of positioning buckles, so that the two sets of steel bar positioning hoop inner hoops and the two sets of steel bar positioning hoop outer hoops are coaxially distributed and form a stable butt joint device, and it can be ensured that multiple straight threaded sleeves are located between the two sets of steel bar positioning hoop inner hoops and located on the same horizontal plane, so that the connecting quality is improved; the bearing capacity and stability of the reinforcement cage are ensured, the requirement for high-quality connection of the large-diameter reinforcement cage in the building industry is met, and the problem that straight threaded sleeves are poor in cooperation during connection is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of reinforcing cage positioning and butt joint, and particularly relates to a large-diameter reinforcing cage butt joint device connected by straight thread sleeves and a construction method. BACKGROUND

[0002] In modern construction engineering, the structural stability of large-diameter reinforcing cages is crucial, and the connection quality directly affects the structural safety. The traditional welding and binding connection has obvious defects: the welding quality is greatly affected by the environment and the welding technology, the construction is time-consuming and easy to damage the performance of the reinforcing bar; the binding connection is insufficient in strength. The straight thread sleeve connection has the advantages of high strength, high reliability, simple operation, and less influence of environmental factors.

[0003] For the large-diameter reinforcing cage structure connected by straight thread sleeves as shown in Figure 3 The structure faces the following problems in application: due to its large weight and large diameter, positioning of multiple reinforcing bars is difficult, resulting in uneven connection quality of the straight thread sleeves. The Chinese invention patent with application number 201811454131.1 discloses a reinforcing bar butt joint positioning device for pile foundation reinforcing cage processing and a construction method. The device includes a steel pipe, a disc, a through hole, an upper section reinforcing bar, a lower section reinforcing bar, and a reinforcing bar fixing mechanism. The centers of the two discs are holed, and the steel pipe is fixedly connected after passing through the holes of the two discs. Multiple through holes are evenly arranged on the circumference of the disc. The upper section reinforcing bar and the lower section reinforcing bar are each provided with multiple reinforcing bars, which are evenly arranged in the through holes on the circumference of the two discs. The upper section reinforcing bar and the lower section reinforcing bar are arranged alternately and spaced apart, and the upper section reinforcing bar, the lower section reinforcing bar, and the steel pipe are parallel to each other. The reinforcing bar fixing mechanism is provided with multiple reinforcing bar fixing mechanisms, which are arranged at the connection between the disc and the upper section reinforcing bar and the lower section reinforcing bar, and are used to fix and position the upper section reinforcing bar and the lower section reinforcing bar. However, the above-mentioned scheme needs to use multiple reinforcing bar fixing mechanisms to install corresponding reinforcing bars during use, and the whole operation process is relatively complicated, which affects the efficiency of on-site construction; and the positioning effect of the straight thread sleeve structure is not good, which easily leads to inaccurate butt joint of the upper and lower section reinforcing cages and poor connection quality, and cannot meet the high-quality connection demand of large-diameter reinforcing cages.

[0004] Therefore, it is necessary to develop a large-diameter reinforcing cage butt joint device connected by straight thread sleeves and a construction method to solve the above-mentioned problems. SUMMARY

[0005] In order to solve the above-mentioned technical problems, the present application provides a large-diameter reinforcing cage butt joint device connected by straight thread sleeves and a construction method to solve the problems of inaccurate butt joint of the upper and lower section reinforcing cages and poor connection quality, ensure the bearing capacity and stability of the reinforcing cage, and meet the demand of the construction industry for high-quality connection of large-diameter reinforcing cages.

[0006] The application provides the following technical scheme: The large-diameter steel cage butt joint device connected by straight thread sleeves comprises The steel positioning hoop outer hoop is provided with a plurality of outer hoop positioning holes. The steel positioning hoop inner hoop is provided with a plurality of inner hoop positioning holes. The positioning buckle is used for positioning and combining the two groups of steel positioning hoop outer hoops and the two groups of steel positioning hoop inner hoops, and the positioning buckle is detachably installed between the inner and outer sides of the steel positioning hoop outer hoops and the steel positioning hoop inner hoops. The butt joint steel comprises a straight thread sleeve, an upper layer of steel and a lower layer of steel, wherein the straight thread sleeve is located between the two groups of steel positioning hoop inner hoops, and the upper layer of steel and the lower layer of steel are respectively threadedly connected to the two ends of the straight thread sleeve.

[0007] Preferably, the number of the outer hoop positioning holes and the inner hoop positioning holes is multiple, the outer hoop positioning holes and the inner hoop positioning holes are in annular array distribution, and the outer hoop positioning holes and the inner hoop positioning holes are one-to-one corresponding distribution.

[0008] Preferably, the inner diameters of the steel positioning hoop outer hoop and the steel positioning hoop inner hoop are equal, and the outer diameter of the steel positioning hoop outer hoop is greater than the inner diameter of the steel positioning hoop inner hoop, so that the multiple outer hoop positioning holes and the inner hoop positioning holes distributed longitudinally are coaxially distributed.

[0009] Preferably, the number of the support steel and the butt joint steel is equal to half of the number of the outer hoop positioning holes on one steel positioning hoop outer hoop, and the annular structure formed by the surrounding distribution of the multiple support steels and butt joint steels is bound with hoop steels at both ends.

[0010] Preferably, the outer diameters of the support steel, the upper layer of steel and the lower layer of steel are equal, and the outer diameters are equal to the inner diameters of the outer hoop positioning holes or the inner hoop positioning holes.

[0011] Preferably, the upper and lower steel bars are respectively provided with positive and reverse external threads at the ends, and the straight thread sleeve is respectively provided with positive and reverse internal threads at the two ends, which are matched with the positive and reverse external threads of the upper and lower steel bars, and the lengths of the positive and reverse external threads of the upper and lower steel bars are set as half of the total length of the straight thread sleeve.

[0012] Preferably, the outer hoop positioning hole is in the shape of U, the inner hoop positioning hole is in the shape of half-ellipse, and the corresponding outer hoop positioning hole and inner hoop positioning hole form a limiting ring in the longitudinal direction.

[0013] Preferably, the outer hoop of the steel bar positioning hoop comprises two first half-ring plates and two connecting plates, the two first half-ring plates are butted at the ends and symmetrically distributed, and the two first half-ring plates are connected through the connecting plates. The inner hoop of the steel bar positioning hoop comprises two second half-ring plates and two connecting plates, the two second half-ring plates are butted at the ends and symmetrically distributed, and the two second half-ring plates are connected through the connecting plates.

[0014] Preferably, the number of the positioning buckles is at least two, and a plurality of positioning buckles are arranged in an annular array outside the outer hoop of the steel bar positioning hoop and the inner hoop of the steel bar positioning hoop, the outer positioning buckles and the inner positioning buckles are arranged in parallel, and are perpendicular to the outer hoop of the steel bar positioning hoop and the inner hoop of the steel bar positioning hoop.

[0015] The application also discloses a butt joint construction method of a large-diameter steel bar cage connected by a straight thread sleeve. S1, the two first half-ring plates are connected through the two connecting plates to form a group of circular annular outer hoops of the lower steel bar positioning hoop, the support steel bars and the lower steel bars with completed threads are sequentially installed in a form of one every other, and the straight thread sleeve is connected to the top end of the lower steel bar and is rechecked. S2, a group of inner hoops of the steel bar positioning hoop are installed at the bottom end of the straight thread sleeve, the two second half-ring plates are attached to the bottom surface of the straight thread sleeve, the inner hoop positioning holes are one-to-one correspondingly clamped into the support steel bars and the lower steel bars, then the two second half-ring plates are connected through the two connecting plates to form a group of circular annular inner hoops of the steel bar positioning hoop. S3, the upper steel bar is screwed into the inner side of the top end of the straight thread sleeve, a group of inner hoops of the steel bar positioning hoop and a group of outer hoops of the steel bar positioning hoop are sequentially installed above the straight thread sleeve, the two groups of inner hoops of the steel bar positioning hoop and the two groups of outer hoops of the steel bar positioning hoop are symmetrically distributed about the center cross-sectional axis of the straight thread sleeve, a plurality of outer hoop positioning holes and inner hoop positioning holes form a limiting ring in the longitudinal direction, and the support steel bars, the upper steel bar and the lower steel bar are all embedded into the corresponding limiting rings. S4, the two groups of steel bar positioning hoop inner hoop and the two groups of steel bar positioning hoop outer hoop are combined through multiple sets of positioning buckles, the outer positioning buckle and the outer positioning buckle slots at both ends thereof are used to preliminarily fix the upper and lower two layers of steel bar positioning hoop outer hoops, and the inner positioning buckle and the inner positioning buckle slots at both ends thereof are used to preliminarily fix the upper and lower two layers of steel bar positioning hoop inner hoops; the positioning bolts movably arranged on the outer positioning buckle and the inner positioning buckle are tightened, the outer positioning buckle and the inner positioning buckle are close to each other, and the two groups of steel bar positioning hoop inner hoops and the two groups of steel bar positioning hoop outer hoops are effectively bound; S5, the multiple sets of positioning buckles are uniformly distributed, after all the positioning buckles are installed, the connection of the upper layer of steel bars and the lower layer of steel bars with the straight thread sleeves is detected again, so that the upper layer of steel bars and the lower layer of steel bars abut against each other after entering the end portions of the straight thread sleeves, and the butt joint steel bars are formed; S6, the stirrups are arranged at both ends of the multiple support steel bars and the butt joint steel bars, the tied steel cage is formed, the steel bar positioning hoop outer hoop, the steel bar positioning hoop inner hoop and the positioning buckle are removed after inspection, and finally the formed steel cage is hoisted to a construction working position and installed.

[0016] Compared with the prior art, the present application has the following beneficial effects: The two groups of steel bar positioning hoop inner hoops and the two groups of steel bar positioning hoop outer hoops are positioned and combined through multiple sets of positioning buckles, are coaxially distributed and form a stable butt joint device, can ensure that the multiple straight thread sleeves are located between the two groups of steel bar positioning hoop inner hoops and are in the same horizontal plane, can improve the connection quality, can ensure the bearing capacity and stability of the steel cage, can meet the demand of the building industry for high-quality connection of the large-diameter steel cage, the uniformly distributed limiting rings can facilitate the connection and installation of the large-diameter steel cage, and can improve the poor coordination of the straight thread sleeves during connection.

[0017] The steel bar positioning hoop outer hoop and the steel bar positioning hoop inner hoop are arranged in a semicircular ring plate combined structure, the positioning buckle is detachably installed between the inner and outer sides of the steel bar positioning hoop outer hoop and the steel bar positioning hoop inner hoop, the outer positioning buckle and the outer positioning buckle slots at both ends thereof are used to preliminarily fix the upper and lower two layers of steel bar positioning hoop outer hoops, the inner positioning buckle and the inner positioning buckle slots at both ends thereof are used to preliminarily fix the upper and lower two layers of steel bar positioning hoop inner hoops, the positioning bolts movably arranged on the outer positioning buckle and the inner positioning buckle are tightened, the outer positioning buckle and the inner positioning buckle are close to each other, and the two groups of steel bar positioning hoop inner hoops and the two groups of steel bar positioning hoop outer hoops are effectively bound, the steel cage is easy to disassemble after forming, the on-site construction efficiency is greatly improved, the device can be recycled, and the construction cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application provides a butt joint device combined with a large-diameter steel cage connected by a straight thread sleeve.

[0019] Figure 2This is a three-dimensional diagram of the docking device provided by the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a large-diameter steel cage connected by straight thread sleeves according to an embodiment of the present invention.

[0021] Figure 4 It is a three-dimensional diagram of the outer hoop of the steel bar positioning hoop in the present invention.

[0022] Figure 5 It is a three-dimensional diagram of the inner hoop of the steel bar positioning hoop in the present invention.

[0023] Figure 6 It is a schematic diagram of the distribution structure of the inner hoop of the steel bar positioning hoop and the straight thread sleeve in the present invention.

[0024] Figure 7 It is a schematic diagram of the partial cross-section structure of the butt-jointed steel bars in the present invention.

[0025] Figure 8 This is a schematic diagram of an embodiment of the positioning buckle in the present invention.

[0026] Markings in the figure: 1. Outer steel bar positioning hoop; 2. Inner steel bar positioning hoop; 3. Positioning buckle; 4. Support steel bar; 5. Straight thread sleeve; 6. Connecting plate; 7. Upper steel bar; 8. Lower steel bar; 9. Stirrups; 1-1, outer hoop positioning hole; 1-2, first semicircular ring plate; 2-1, inner hoop positioning hole; 2-2, second semicircular ring plate; 3-1. Positioning bolt; 3-2. External positioning buckle; 3-3. Internal positioning buckle; 3-4. External positioning slot; 3-5. Internal positioning slot. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figures 1-8 The large-diameter steel cage docking device shown uses a straight thread sleeve connection, including a steel bar positioning hoop outer hoop 1, a steel bar positioning hoop inner hoop 2 and a positioning buckle 3, wherein the number of the steel bar positioning hoop outer hoop 1 is set to two groups, and the two groups of steel bar positioning hoop outer hoop 1 are arranged in parallel, and the inner side of the steel bar positioning hoop outer hoop 1 is opened with an outer hoop positioning hole 1-1; The number of the inner hoops 2 is set to two groups, and the two groups of the inner hoops 2 are distributed in parallel with the outer hoops 1 and are arranged between the two groups of the outer hoops 1, and the outer side of the inner hoops 2 is provided with inner hoop positioning holes 2-1; The positioning buckle 3 is used for positioning and combining the two groups of the outer hoops 1 and the two groups of the inner hoops 2, and the positioning buckle 3 is detachably arranged between the inner and outer sides of the outer hoops 1 and the inner hoops 2. Specifically, the cross-sectional shape of the outer hoop positioning hole 1-1 is set to U-shaped, the cross-sectional shape of the inner hoop positioning hole 2-1 is set to semi-elliptical, and the corresponding outer hoop positioning hole 1-1 and the inner hoop positioning hole 2-1 form a limiting ring in the longitudinal direction; the semi-elliptical outer hoop positioning hole 1-1 can prevent a certain small error in the steel bar installation and positioning, so as to facilitate the adjustment of the position of the steel bar.

[0029] As a preferred embodiment of the positioning buckle 3 in the present application, the number of the positioning buckle 3 is four, and the four positioning buckles 3 are arranged in a ring array, the positioning buckle 3 comprises a positioning bolt 3-1, an outer positioning buckle 3-2 and an inner positioning buckle 3-3, the positioning bolt 3-1 penetrates through the outer positioning buckle 3-2 and is rotationally connected with the penetrating hole, and the positioning bolt 3-1 is threadedly connected with the inner positioning buckle 3-3; both ends of the outer positioning buckle 3-2 are provided with outer positioning buckle slots 3-4, both ends of the inner positioning buckle 3-3 are provided with inner positioning buckle slots 3-5, and the two outer positioning buckle slots 3-4 are respectively matched with the outer sides of the two groups of the outer hoops 1, and the two inner positioning buckle slots 3-5 are respectively matched with the inner sides of the two groups of the inner hoops 2. The distance between the positioning buckle slots 3-5 at both ends of the same inner positioning buckle 3-3 is equal to the length of the straight thread sleeve 5, so as to ensure that all the straight thread sleeves 5 are in the same horizontal plane during the fastening process of the upper steel bar 7 and the lower steel bar 8.

[0030] In addition, the number of the positioning buckle 3 is at least two, and the plurality of positioning buckles 3 are arranged in a ring array on the outer sides of the outer hoops 1 and the inner hoops 2, the outer positioning buckle 3-2 and the inner positioning buckle 3-3 are arranged in parallel and perpendicularly with the outer hoops 1 and the inner hoops 2.

[0031] The butt joint device is provided with the supporting steel bars 4 and the butt joint steel bars, the supporting steel bars 4 and the butt joint steel bars are embedded in the two groups of the outer hoops 1 and the two groups of the inner hoops 2 in an alternating distribution state, and the butt joint steel bars comprise the straight thread sleeve 5, the upper steel bar 7 and the lower steel bar 8, wherein the straight thread sleeve 5 is located between the two groups of the inner hoops 2, and the upper steel bar 7 and the lower steel bar 8 are respectively threadedly connected with both ends of the straight thread sleeve 5.

[0032] Specifically, in the above technical scheme, the number of the outer hoop positioning hole 1-1 and the inner hoop positioning hole 2-1 is set to be multiple, the multiple outer hoop positioning holes 1-1 and the multiple inner hoop positioning holes 2-1 are arranged in a ring array, and the multiple outer hoop positioning holes 1-1 and the multiple inner hoop positioning holes 2-1 are distributed in one-to-one correspondence.

[0033] Specifically, in the above technical scheme, the inner diameter of the outer hoop 1 of the steel bar positioning hoop and the inner hoop 2 is equal, and the outer diameter of the outer hoop 1 of the steel bar positioning hoop is greater than the inner diameter of the inner hoop 2 of the steel bar positioning hoop, so that the multiple outer hoop positioning holes 1-1 and the inner hoop positioning holes 2-1 distributed longitudinally are coaxially distributed.

[0034] Specifically, in the above technical scheme, the number of the support steel bars 4 and the butt joint steel bars is equal to half of the number of the outer hoop positioning holes 1-1 on the outer hoop 1 of the steel bar positioning hoop, and the ring structure formed by the multiple support steel bars 4 and the butt joint steel bars is surrounded and distributed, and the ends of the ring structure are bound with the hoop reinforcement 9.

[0035] Specifically, in the above technical scheme, the outer diameters of the support steel bars 4, the upper layer steel bars 7 and the lower layer steel bars 8 are equal, and the outer diameters are equal to the inner diameters of the outer hoop positioning holes 1-1 or the inner hoop positioning holes 2-1.

[0036] Specifically, in the above technical scheme, the upper layer steel bars 7 and the lower layer steel bars 8 are respectively provided with positive and negative external threads at the ends, the positive and negative external threads are represented as the external threads at the ends of the upper layer steel bars 7 and the lower layer steel bars 8 being reversely arranged, the inner sides of the straight thread sleeves 5 are respectively provided with positive and negative internal threads matched with the positive and negative external threads at the ends of the upper layer steel bars 7 and the lower layer steel bars 8, the positive and negative internal threads are represented as the inner threads being reversely arranged on both sides with the middle as a boundary, and the positive and negative external threads of the upper layer steel bars 7 and the lower layer steel bars 8 are set to be half of the total length of the straight thread sleeves 5. Figure 7

[0037] Specifically, in the above technical scheme, the outer hoop 1 of the steel bar positioning hoop comprises two first half ring plates 1-2 and two connecting plates 6, the two first half ring plates 1-2 are butt jointed and symmetrically distributed at the ends, and the two first half ring plates 1-2 are connected through the connecting plates 6. The inner hoop 2 of the steel bar positioning hoop comprises two second half ring plates 2-2 and two connecting plates 6, the two second half ring plates 2-2 are butt jointed and symmetrically distributed at the ends, and the two second half ring plates 2-2 are connected through the connecting plates 6.

[0038] The application also discloses a butt joint construction method of a large-diameter steel bar cage connected by a straight thread sleeve, which adopts the butt joint device and comprises the following steps. ​S1, connect two first half circular ring plates 1-2 through two connecting plates 6 to combine into a group of circular annular lower steel bar positioning hoop outer hoops 1, install support steel bars 4 and lower steel bars 8 with completed threads in turn in the form of one every other, connect straight threaded sleeves 5 at the top end of the lower steel bars 8 and recheck; S2, install a group of steel bar positioning hoop inner hoops 2 at the bottom end of the straight threaded sleeves 5, paste two second half circular ring plates 2-2 to the bottom surface position of the straight threaded sleeves 5 and make the inner hoop positioning holes 2-1 correspondingly clamped into the support steel bars 4 and the lower steel bars 8, then connect the two second half circular ring plates 2-2 through two connecting plates 6 to combine into a group of circular annular steel bar positioning hoop inner hoops 2; S3, screw the upper steel bars 7 into the inner side top end of the straight threaded sleeves 5, further install a group of steel bar positioning hoop inner hoops 2 and a group of steel bar positioning hoop outer hoops 1 in turn above the straight threaded sleeves 5, make the two groups of steel bar positioning hoop inner hoops 2 and the two groups of steel bar positioning hoop outer hoops 1 symmetrically distributed about the central cross section axis of the straight threaded sleeves 5, the multiple outer hoop positioning holes 1-1 and the inner hoop positioning holes 2-1 form limiting rings in the longitudinal direction, and the support steel bars 4, the upper steel bars 7 and the lower steel bars 8 are all embedded into the corresponding limiting rings; S4, combine the two groups of steel bar positioning hoop inner hoops 2 and the two groups of steel bar positioning hoop outer hoops 1 through multiple groups of positioning buckles 3, preliminarily fix the upper and lower two layers of steel bar positioning hoop outer hoops 1 by using the outer positioning buckles 3-2 and the outer positioning buckle slots 3-4 at both ends thereof, and preliminarily fix the upper and lower two layers of steel bar positioning hoop inner hoops 2 by using the inner positioning buckles 3-3 and the inner positioning buckle slots 3-5 at both ends thereof, rotate the positioning bolts 3-1 movably arranged on the outer positioning buckles 3-2 and the inner positioning buckles 3-3 to make the outer positioning buckles 3-2 and the inner positioning buckles 3-3 close to each other, and effectively bind the two groups of steel bar positioning hoop inner hoops 2 and the two groups of steel bar positioning hoop outer hoops 1; S5, the multiple groups of positioning buckles 3 are uniformly distributed, after installing all the positioning buckles 3, detect again the connection condition of the upper steel bars 7 and the lower steel bars 8 with the straight threaded sleeves 5, make the upper steel bars 7 and the lower steel bars 8 abut against each other after entering the rear end of the straight threaded sleeves 5, ensure that the upper steel bars 7 and the lower steel bars 8 are tightly connected in the straight threaded sleeves 5 to form butt-jointed steel bars; S6, hoop steel bars 9 are arranged at both ends of the multiple support steel bars 4 and the butt-jointed steel bars to form a tied steel bar cage, after inspection, remove the steel bar positioning hoop outer hoops 1, the steel bar positioning hoop inner hoops 2 and the positioning buckles 3, and finally hoist the formed steel bar cage as shown in the drawing to the construction working position and complete the installation. Figure 3

[0039] The preferred embodiments of the application are described in detail above, but the application is not limited to the specific details in the above-described embodiments, within the technical concept range of the application, the technical solutions of the application can be variously transformed, and these equivalent transformations all belong to the protection range of the application.​

Claims

1. A large diameter steel cage docking device connected by a straight thread sleeve is characterized in that: include The number of the steel bar positioning hoop outer hoops (1) is set to two groups, and the two groups of steel bar positioning hoop outer hoops (1) are distributed in parallel, and the inner side of the steel bar positioning hoop outer hoops (1) is provided with outer hoop positioning holes (1-1); The inner hoops (2) of the steel bar positioning hoop are arranged in two groups, and the two groups of inner hoops (2) of the steel bar positioning hoop are distributed in parallel with the outer hoops (1) of the steel bar positioning hoop and are arranged between the two groups of outer hoops (1). The outer sides of the inner hoops (2) of the steel bar positioning hoop are provided with inner hoop positioning holes (2-1); A positioning buckle (3) is used to position and combine two groups of outer hoops (1) of steel bar positioning hoops and two groups of inner hoops (2) of steel bar positioning hoops, and the positioning buckle (3) is detachably installed between the inner and outer sides of the outer hoops (1) of the steel bar positioning hoops and the inner hoops (2) of the steel bar positioning hoops; the positioning buckle (3) comprises a positioning bolt (3-1), an outer positioning buckle (3-2) and an inner positioning buckle (3-3); the positioning bolt (3-1) passes through the outer positioning buckle (3-2) and is rotatably connected to the through hole; the positioning bolt (3-1) and the inner positioning buckle (3-3) are threadedly sleeved; both ends of the outer positioning buckle (3-2) are provided with outer positioning slots (3-4); both ends of the inner positioning buckle (3-3) are provided with inner positioning slots (3-5); the two outer positioning slots (3-4) are respectively butted against the outer sides of the two groups of outer hoops (1) of the steel bar positioning hoops, and the two inner positioning slots (3-5) are respectively butted against the inner sides of the two groups of inner hoops (2) of the steel bar positioning hoops; The supporting steel bars (4) and the butt joint steel bars are alternately distributed and embedded between two groups of outer steel bar positioning hoops (1) and two groups of inner steel bar positioning hoops (2). The butt joint steel bars include a straight thread sleeve (5), an upper steel bar (7) and a lower steel bar (8), wherein the straight thread sleeve (5) is located between the two groups of inner steel bar positioning hoops (2), and the upper steel bar (7) and the lower steel bar (8) are respectively threadedly connected to both ends of the straight thread sleeve (5).

2. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The number of the outer hoop positioning holes (1-1) and the inner hoop positioning holes (2-1) is set to be multiple, the multiple outer hoop positioning holes (1-1) and the multiple inner hoop positioning holes (2-1) are distributed in a ring array, and the multiple outer hoop positioning holes (1-1) and the multiple inner hoop positioning holes (2-1) are distributed in a one-to-one correspondence.

3. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 2 is characterized in that: The inner diameters of the outer steel bar positioning hoop (1) and the inner steel bar positioning hoop (2) are equal, and the outer diameter of the outer steel bar positioning hoop (1) is larger than the inner diameter of the inner steel bar positioning hoop (2), so that the plurality of longitudinally distributed outer hoop positioning holes (1-1) and inner hoop positioning holes (2-1) are coaxially distributed.

4. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The number of the supporting steel bars (4) and the butt joint steel bars is equal to half the number of the outer hoop positioning holes (1-1) on the outer hoop of a steel bar positioning hoop (1), and stirrups (9) are tied at both ends of the ring structure formed by the surrounding distribution of multiple supporting steel bars (4) and butt joint steel bars.

5. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The outer diameters of the support steel bars (4), the upper steel bars (7) and the lower steel bars (8) are equal, and are equal to the inner diameters of the outer hoop positioning holes (1-1) or the inner hoop positioning holes (2-1).

6. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The ends of the upper steel bars (7) and the lower steel bars (8) are respectively provided with positive and negative external threads, and the inner ends of the straight thread sleeve (5) are respectively provided with positive and negative internal threads matching the positive and negative external threads of the ends of the upper steel bars (7) and the lower steel bars (8), and the length of the positive and negative external threads of the upper steel bars (7) and the lower steel bars (8) is set to half the total length of the straight thread sleeve (5).

7. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The cross-sectional shape of the outer hoop positioning hole (1-1) is set to be U-shaped, the cross-sectional shape of the inner hoop positioning hole (2-1) is set to be semi-elliptical, and the corresponding outer hoop positioning hole (1-1) and the inner hoop positioning hole (2-1) form a limiting circle in the longitudinal direction.

8. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1 is characterized in that: The outer hoop of the steel bar positioning hoop (1) comprises two first semicircular ring plates (1-2) and two connecting plates (6), the ends of the two first semicircular ring plates (1-2) are butt-jointed and symmetrically distributed, and the two first semicircular ring plates (1-2) are connected via the connecting plates (6); The inner hoop of the steel bar positioning hoop (2) comprises two second semi-circular ring plates (2-2) and two connecting plates (6); the ends of the two second semi-circular ring plates (2-2) are butt-jointed and symmetrically distributed, and the two second semi-circular ring plates (2-2) are connected via the connecting plates (6).

9. The large diameter steel cage docking device using a straight thread sleeve connection according to claim 1, characterized in that: The number of the positioning clips (3) is set to at least two, and the plurality of positioning clips (3) are distributed in a ring array outside the outer hoop (1) of the steel bar positioning hoop and the inner hoop (2) of the steel bar positioning hoop, the outer positioning clips (3-2) and the inner positioning clips (3-3) are distributed in parallel and are arranged perpendicular to the outer hoop (1) of the steel bar positioning hoop and the inner hoop (2) of the steel bar positioning hoop.

10. A method for butt-jointing large-diameter steel cages using straight thread sleeves, using the butt-jointing device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Connect the two first semicircular ring plates (1-2) through two connecting plates (6) to form a set of circular lower layer steel bar positioning hoop outer hoop (1), install the supporting steel bars (4) and the lower layer steel bars (8) with threading completed in a one-by-one arrangement, connect the straight thread sleeve (5) to the top of the lower layer steel bars (8) and review; S2, installing a set of steel bar positioning hoop inner hoops (2) at the bottom end of the straight thread sleeve (5), fitting the two second semi-circular ring plates (2-2) to the bottom surface of the straight thread sleeve (5), and making the inner hoop positioning holes (2-1) correspondingly engage the supporting steel bars (4) and the lower steel bars (8), and then connecting the two second semi-circular ring plates (2-2) through two connecting plates (6) to form a set of circular steel bar positioning hoop inner hoops (2); S3, screwing the upper steel bar (7) into the inner top end of the straight threaded sleeve (5), and further sequentially installing a set of inner steel bar positioning hoop (2) and a set of outer steel bar positioning hoop (1) above the straight threaded sleeve (5), so that the two sets of inner steel bar positioning hoop (2) and the two sets of outer steel bar positioning hoop (1) are symmetrically distributed about the central cross-sectional axis of the straight threaded sleeve (5), and the plurality of outer hoop positioning holes (1-1) and the inner hoop positioning holes (2-1) form a limiting circle in the longitudinal direction, and the supporting steel bar (4), the upper steel bar (7) and the lower steel bar (8) are all embedded in the corresponding limiting circles; S4, combining two sets of inner hoops (2) of steel bar positioning hoops and two sets of outer hoops (1) of steel bar positioning hoops by using multiple sets of positioning clips (3), using outer positioning clips (3-2) and outer positioning slots (3-4) at both ends to preliminarily fix the upper and lower layers of outer hoops (1) of steel bar positioning hoops, similarly, using inner positioning clips (3-3) and inner positioning slots (3-5) at both ends to preliminarily fix the upper and lower layers of inner hoops (2) of steel bar positioning hoops, tightening positioning bolts (3-1) movably provided on the outer positioning clips (3-2) and the inner positioning clips (3-3), so that the outer positioning clips (3-2) and the inner positioning clips (3-3) are close to each other, thereby effectively restraining the two sets of inner hoops (2) of steel bar positioning hoops and the two sets of outer hoops (1); S5, multiple sets of positioning clips (3) are evenly distributed. After all positioning clips (3) are installed, the connection between the upper steel bar (7) and the lower steel bar (8) and the straight thread sleeve (5) is checked again, so that the upper steel bar (7) and the lower steel bar (8) are abutted against each other after entering the straight thread sleeve (5), forming a butt-jointed steel bar; S6. Stirrups (9) are placed at both ends of the plurality of supporting steel bars (4) and the butting steel bars to form a tied steel cage. After passing the inspection, the outer steel bar positioning hoop (1), the inner steel bar positioning hoop (2) and the positioning buckle (3) are removed. Finally, the formed steel cage is hoisted to the construction site and the installation is completed.

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