Rapid butt joint device for reinforcement cage

Abstract

A rapid butt joint device for a reinforcement cage relates to the technical field of pile construction, and comprises a cylindrical shell, a locking sleeve and two sleeve pin shafts, when the reinforcement cage is processed, the reinforcement cage is firstly integrally processed and then segmented, and butt joint steel bars of the segmented reinforcement cage are mounted on the butt joint device one by one; the two sleeve pin shafts are in threaded connection with an upper section of steel bar and a lower section of steel bar of the sectional steel reinforcement cage respectively, the cylindrical shell and the locking sleeve are arranged on the two sleeve pin shafts respectively in a sleeving mode, the cylindrical shell and the locking sleeve are connected in a sleeving mode, and mechanical butt joint of the upper section of steel bar and the lower section of steel bar of the sectional steel reinforcement cage is achieved in the mode that the cylindrical shell and the locking sleeve are screwed and tightened. Then steel bars are numbered, and then the butt joint device is disassembled to segment the steel bar cage; when the reinforcement cage is installed, the reinforcement cage is hoisted section by section, and the upper section and the lower section of the reinforcement cage are in butt joint through the butt joint device. When the butt-joint device is used for butt-joint construction, the problems of dislocation of steel bar joints, overlarge gaps and the like during sectional hoisting of the steel bar cage can be avoided, the connection is convenient, and the strength loss of the joints cannot be caused.

Description

Technical Field

[0001] This utility model relates to the field of pile and column construction technology, specifically to a rapid docking device for segmented hoisting of pile and column steel cages. Background Technology

[0002] During pile foundation construction, when the pile foundation is deep and the lifting height and weight of the hoisting equipment cannot meet the requirements for one-time hoisting, or when the rigidity of the steel cage itself cannot meet the requirements for one-time hoisting, the steel cage is generally divided into two or more sections for hoisting.

[0003] Currently, the on-site splicing method for prefabricated steel cages generally adopts lap welding. However, the construction site conditions are poor, the welding is difficult, the construction efficiency is low, there are many steel bar joints, and the welding time is not easy to control. This can easily lead to excessive joint treatment time and cause pile foundation collapse.

[0004] If a sleeve connection process is used, all sleeves at the joints need to be tightened simultaneously, which is extremely difficult to achieve. Furthermore, gaps are inevitable in the butt joints, resulting in insufficient thread length and affecting joint strength. Currently, there are two common solutions: one is to use an extended sleeve, with a standard thread machined at one end of the butt joint and the other end threaded to the length of the extended sleeve. Before butt jointing, the sleeve is fully screwed onto the extended threaded rebar. After butt jointing, the sleeve is then tightened back onto the standard threaded rebar. This method results in thread leakage exceeding the allowable limit in the specifications, leading to a loss of joint strength. The other method involves first thickening one end of the butt joint, then threading it, and screwing the sleeve onto the thickened end. After butt jointing, the sleeve is then tightened back onto the normal joint rebar. This method is complex and requires high-quality thickening. Utility Model Content

[0005] The purpose of this invention is to provide a quick rebar cage connection device that can prevent rebar misalignment during connection construction, facilitate connection, and avoid loss of joint strength.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] This utility model provides a quick-connection device for rebar cages. The device includes a sleeve pin, a cylindrical outer shell, and a locking sleeve. There are two sleeve pins, namely a first sleeve pin and a second sleeve pin. There is one cylindrical outer shell and one locking sleeve. The first sleeve pin is threadedly connected to the upper section of the corresponding segmented rebar cage, and the second sleeve pin is threadedly connected to the lower section of the corresponding segmented rebar cage. The pin heads of the first sleeve pin and the second sleeve pin are pressed together. The locking sleeve is sleeved on the second sleeve pin, and the cylindrical outer shell is sleeved on the first sleeve pin. The locking sleeve is connected to the cylindrical outer shell sleeve.

[0008] The first sleeve pin and the second sleeve pin have the same structure and size.

[0009] The internal thread of the sleeve pin matches the thread of the reinforcing bar in the steel cage.

[0010] The internal thread of the cylindrical outer shell matches the external thread of the locking sleeve.

[0011] The sleeve pin includes a pin head and a pin shank. The pin head is a cylindrical head, and the length of the pin shank is half the length of the straight thread sleeve. The pin shank has a threaded hole inside that matches the diameter of the reinforcing bars in the reinforcing cage. The thread of the threaded hole is a straight thread.

[0012] The locking sleeve includes a locking sleeve body and a limiting step. The locking sleeve body has an inner hole, which is a smooth, continuous circular hole with a diameter slightly larger than the outer diameter of the pin shank of the second sleeve. The outer wall of the locking sleeve body has an external thread with a thread length of 2 + 5 mm. One end of the outer wall of the locking sleeve body has a limiting step, which is a hexagonal polygonal prism or an anti-slip shape formed by cutting a cylinder. The other end of the limiting step is the locking sleeve insertion port.

[0013] The cylindrical shell includes a cylindrical shell body and an end limiting plate. The outer wall of the cylindrical shell body is engraved with anti-slip diagonal lines. The cylindrical shell body has an inner hole with a diameter slightly larger than the diameter of the pin head of the first sleeve pin. The inner section of the inner hole has a smooth hole wall with a depth H1 that is twice the thickness of the pin head of the sleeve pin. The outer section has an internally threaded hole wall with a depth H2 = length of straight thread sleeve / 2 + 5mm. The threaded section of the cylindrical shell has a locking round hole, which is locked with a screw. One end of the cylindrical shell body has an end limiting plate with a cylindrical hole in the center, the diameter of which is slightly larger than the diameter of the pin shank of the first sleeve pin. The other end of the cylindrical shell is a cylindrical shell socket.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The locking sleeve and cylindrical outer shell of this utility model are pre-fitted onto the steel cage for connecting reinforcement bars. When the steel cages are connected, the steel bars can be mechanically connected and reinforced one by one, which is simple to operate.

[0016] 2. This utility model uses a cylindrical outer shell to tighten the sleeve pin shaft for connection, which can ensure that there are no exposed threads of the reinforcing bars and avoid the loss of strength of the reinforcing bar butt joint.

[0017] 3. The two sleeve pins of this utility model are slidably connected to the cylindrical outer shell, and can rotate and slide freely. Compared with the threaded connection, it will not cause difficulty in screwing due to misalignment of the mating.

[0018] 4. This utility model can directly replace the sleeve and be used at the sectioning of the rebar cage. It can directly process the rebar cage into a whole without the need to process the rebar cage in sections or use rebar positioning auxiliary tools.

[0019] 5. The steel cage processed using this utility model can be quickly divided into two or more sections by unscrewing the locking sleeve and cylindrical outer shell of this utility model at the sectioning point.

[0020] 6. The locking sleeve and cylindrical outer shell of this utility model have a margin in thread length, which can solve the problem that when the steel cage is slightly deformed during hoisting, the joint gap will not affect the thread length and will not cause a loss of joint strength.

[0021] 7. By first processing the steel cage as a whole and then disassembling it into sections, problems such as misalignment of steel bar joints and excessive gaps can be avoided when hoisting the steel cage into sections.

[0022] 8. This utility model has the feature of being repeatedly installable and disassembled, and has the advantage of being directly used for the overall processing of steel cages and disassembling and installing them in sections. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly structure of this utility model;

[0024] Figure 2 This is an axial sectional view of the first sleeve pin of this utility model;

[0025] Figure 3 This is an axial sectional view of the second sleeve pin of this utility model;

[0026] Figure 4 This is an axial sectional view of the cylindrical outer shell of this utility model;

[0027] Figure 5 This is an axial sectional view of the locking sleeve of this utility model;

[0028] Figure 6 This is a schematic diagram of the cross-section of the various components of this utility model and the reinforcing steel cage assembled with steel bars;

[0029] Figure 7 A schematic diagram of the rebar butt joint positioning section of the rebar cage assembled according to this utility model;

[0030] Figure 8 A schematic diagram of the connection and reinforcement section of the reinforcing bars of the steel cage after butt joint positioning using this utility model;

[0031] Figures 9-13 This is a schematic diagram illustrating the construction steps of the rapid connection method for steel cages based on this utility model.

[0032] Figure reference numerals:

[0033] 1a-First sleeve pin, 1b-Second sleeve pin, 2-Locking sleeve, 3-Cylindrical outer shell, 4a-Upper section reinforcing bar, 4b-Lower section reinforcing bar.

[0034] 11-Pin head, 12-Pin handle, 13-Thread.

[0035] 21-Inner hole, 22-External thread, 23-Limiting step, 24-Locking sleeve socket.

[0036] 31-Outer wall, 32-End limiting plate, 33-Cylindrical hole, 34-Smooth hole wall, 35-Internal threaded hole wall, 36-Locking round hole, 37-Cylindrical outer shell socket.

[0037] 41-Thread tip. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0039] See Figures 1-8This utility model provides a quick-connection device for rebar cages. The device includes a sleeve pin, a locking sleeve 2, and a cylindrical outer shell 3, all of which are made of high-strength stainless steel. There are two sleeve pins: a first sleeve pin 1a and a second sleeve pin 1b. The two sleeve pins have the same structure and size. Each sleeve pin includes a pin head 11 and a pin shank 12. The pin head 11 is a cylindrical head, and the pin shank 12 is half the length of the straight-threaded sleeve. The pin shank 12 has a threaded hole 13 inside that matches the diameter of the rebar in the rebar cage. The threaded hole 13 uses a straight thread. A locking sleeve 2 is provided, which includes a locking sleeve body and a limiting step 23. The locking sleeve body has an inner hole 21, which is a smooth, continuous circular hole. The diameter of the inner hole 21 is slightly larger than the outer diameter of the pin shank 12 of the second sleeve pin 1b. The outer wall of the locking sleeve body is provided with an external thread 22, the thread length of which is equal to the length of the straight thread sleeve / 2 + 5 mm. One end of the outer wall of the locking sleeve body is provided with a limiting step 23, which is a hexagonal polygonal prism or an anti-slip shape formed by cutting a cylinder. The other end of the limiting step 23 is a locking sleeve insertion port 24. A cylindrical outer shell 3 is provided, comprising a cylindrical outer shell body and an end limiting plate 32. The outer wall 31 of the cylindrical outer shell body is engraved with anti-slip diagonal lines. The cylindrical outer shell body has an inner hole with a diameter slightly larger than the diameter of the pin head 11 of the first sleeve pin 1a. The inner section of the inner hole is a smooth hole wall 34 with a depth H1 = 2t, where t is the thickness of the pin head 11 of the sleeve pin. The outer section of the inner hole is an internally threaded hole wall 35 with a depth H2 = length of straight thread sleeve / 2 + 5mm. The threaded section of the cylindrical outer shell 3 has a locking round hole 36, which is locked by a plug screw. One end of the cylindrical outer shell body has an end limiting plate 32 with a cylindrical hole 33 at its center. The diameter of the cylindrical hole 3 is slightly larger than the diameter of the pin shank 12 of the first sleeve pin 1a. The other end of the cylindrical outer shell 3 has a cylindrical outer shell insertion port 37.In use, the first sleeve pin 1a is threadedly connected to the upper section of the corresponding segmented reinforcing cage 4a, and the second sleeve pin 1b is threadedly connected to the lower section of the corresponding segmented reinforcing cage 4b. The internal thread of the sleeve pin matches the thread 41 of the reinforcing cage, and the internal thread of the sleeve pin engages with the thread 41 of the reinforcing cage, forming a sleeve connection. The locking sleeve 2 is fitted onto the second sleeve pin 1b, and the cylindrical outer shell 3 is fitted onto the first sleeve pin 1a. The locking sleeve 2 and the cylindrical outer shell 3 are threadedly connected, and the internal thread of the cylindrical outer shell 3 matches the external thread 22 of the locking sleeve 2. The two sleeves are screwed together to form a closed limiting shell, which is used to fix the first sleeve pin 1a and the second sleeve pin 1b. The pin heads 11 of the first sleeve pin 1a and the second sleeve pin 1b are pressed together. The locking sleeve 2 and the cylindrical shell 3 respectively pull the first sleeve pin 1a and the second sleeve pin 1b. The upper section of steel bar 4a and the lower section of steel bar 4b are aligned and pressed together by the sleeve pins sleeved on the outside. The first sleeve pin 1a and the second sleeve pin 1b are locked and fixed by screwing the locking sleeve 2 and the cylindrical shell 3, so as to realize the mechanical connection of the upper section of steel bar 4a and the lower section of steel bar 4b of the steel cage and avoid longitudinal and lateral misalignment of the steel bars. The length of the straight thread and the straight thread sleeve meets the requirements of JG / T163 "Sleeves for Mechanical Connection of Steel Bars".

[0040] Combination Figure 9-13 When using this quick-connection device for rebar cage connection, the device is first used to replace the rebar sleeves at the segmentation points to fabricate the rebar cage as a whole. Then, the rebar cage is disassembled into two sections for hoisting, and the device is used to reconnect the rebar cage into a whole. The specific implementation steps are as follows:

[0041] S1: The main reinforcement bars of the steel cage are processed in sections, and the steel cage is fabricated as a whole. First, the positions of the steel cage sections are determined on the CAD drawing, and the main reinforcement bars are cut according to the sections. In the prefabrication plant, the steel cage is fabricated as a whole. The main reinforcement bars on both sides of the steel cage section position are mechanically connected using this docking device: First, the cylindrical shell 3 is inserted into the corresponding upper section steel bar 4a, and then the first sleeve pin 1a is fitted into the threaded end 41 of the upper section steel bar 4a. Then, the first sleeve pin 1a is rotated until the threaded end 41 abuts against the end face of the first sleeve pin 1a and tightened. Similarly, the locking sleeve 2 is inserted into the lower section steel bar 4b, and then the second sleeve pin 1b is fitted into the threaded end 41 of the lower section steel bar 4b. Then, the second sleeve pin 1b is rotated until the threaded end 41 abuts against the end face of the second sleeve pin 1b and tightened. Second, the assembled parts formed in the first step are docked, and the pin heads 11 of the first sleeve pin 1a and the second sleeve pin 1b are tightly abutted without misalignment. Thirdly, first, press the end face of the locking sleeve socket 24 of the locking sleeve 2 against the pin head 11 of the second sleeve pin 1b. Then, insert the cylindrical outer shell 3 into the external thread 22 of the locking sleeve 2. Rotate the cylindrical outer shell 3 so that the internal thread of the internal thread hole wall 35 of the cylindrical outer shell 3 engages with the external thread 22 of the locking sleeve 2, until the end limiting plate 32 of the cylindrical outer shell 3 is locked against the pin head 11 of the first sleeve pin 1a. Then tighten it and screw the screw into the locking hole 36 on the cylindrical outer shell 3 to lock it. After the main reinforcement bars of the steel cage are connected longitudinally using this butt joint device, the main reinforcement bars are fixed to the positioning reinforcement bars. Then, the circumferential stirrups are tied. See Appendix. Figure 9 .

[0042] S2: Disassemble the docking device and the rebar cage sections. Select at least two main reinforcing bars at the rebar cage section as positioning main reinforcing bars, number them, and tie the number plates to the main reinforcing bars with tie wire; then remove the spiral stirrups and temporarily fix them outside the docking area, unscrew the locking sleeve 2 and cylindrical shell 3 of the docking device to disconnect the connection, and divide the rebar cage into two sections, see Appendix. Figure 10 .

[0043] S3: Segmented hoisting and connection of the reinforcing cage. First, lower the first section of the reinforcing cage and fix it at the platform of the pile hole. Then, lower the second section of the reinforcing cage, aligning and tightening the same numbered main reinforcement bars of the upper and lower sections. Temporarily fix it manually. See appendix. Figure 11 .

[0044] S4: Connect using this docking device. Tighten the locking sleeve 2 on the positioning main rib to the sleeve pin, then screw the cylindrical outer shell 3 into the locking sleeve 2 until it is fully engaged, and then tighten. Similarly, adjust the alignment of the other main ribs and tighten the locking sleeve 2 and cylindrical outer shell 3. See attached diagram. Figure 12 The main reinforcing bars on both sides of the segmented position of the steel cage are reconnected one by one using the docking device. After all the main reinforcing bars of the steel cage are reconnected, the screws are inserted into the locking holes 36 of the cylindrical outer shell 3 to lock them in place. At this point, the docking device can no longer be disassembled.

[0045] S5: Binding of circumferential stirrups in the reinforcing cage. Redistribute the circumferential stirrups in the butt joint area according to standard spacing and securely bind them to the main reinforcement. See Appendix. Figure 13 .

[0046] When the main reinforcement bars of the steel cage are misaligned during the connection of the upper and lower sections due to bending during hoisting, auxiliary tools are used to align the misaligned main reinforcement bars and ensure that the gap between the main reinforcement bars is less than 5mm. Then, the connection device is used to connect the upper and lower main reinforcement bars.

Claims

1. A rapid butt joining device for reinforcement cages, characterised in that, The docking device comprises sleeve pins, locking sleeves (2) and cylindrical shells (3), two sleeve pins are provided, namely a first sleeve pin (1a) and a second sleeve pin (1b), one locking sleeve (2) and one cylindrical shell (3) are provided, the first sleeve pin (1a) is threadedly connected with the upper section steel bar (4a) of the corresponding sectioned steel reinforcement cage, the second sleeve pin (1b) is threadedly connected with the lower section steel bar (4b) of the corresponding sectioned steel reinforcement cage, the pin head (11) of the first sleeve pin (1a) and the pin head (11) of the second sleeve pin (1b) abut against each other, the locking sleeve (2) is sleeved on the second sleeve pin (1b), the cylindrical shell (3) is sleeved on the first sleeve pin (1a), and the locking sleeve (2) is sleeve-connected with the cylindrical shell (3).

2. A reinforcing cage rapid docking device according to claim 1, characterised in that, The first sleeve pin (1a) and the second sleeve pin (1b) are consistent in structure and size.

3. The rapid butt joining device for reinforcement cage according to claim 1, characterized in that, The internal thread of the sleeve pin is matched with the wire head (41) of the steel bar of the docked steel reinforcement cage.

4. The reinforcing cage rapid butt joint device according to claim 1, characterized in that, The internal thread of the cylindrical shell (3) is matched with the external thread (22) of the locking sleeve (2).

5. The reinforcing cage rapid docking device according to claim 1, wherein, The sleeve pin comprises a pin head (11) and a pin handle (12), the pin head (11) is a cylindrical head, the length of the pin handle (12) is half of the length of a straight-thread sleeve, the pin handle (12) is internally provided with a threaded hole (13) matched with the diameter of the steel bar of the steel reinforcement cage, and the thread of the threaded hole (13) adopts straight thread.

6. The rapid butt joining device for reinforcement cage according to claim 1, characterized in that, The locking sleeve (2) comprises a locking sleeve body and a limiting step (23), the locking sleeve body is internally provided with an internal hole (21), the internal hole (21) is a through smooth circular hole, the diameter of the internal hole (21) is slightly larger than the outer diameter of the pin handle (12) of the second sleeve pin (1b), the outer wall of the locking sleeve body is provided with an external thread (22), the thread length is equal to the standard sleeve length / 2+5mm, one end of the outer wall of the locking sleeve body is provided with the limiting step (23), the limiting step (23) has the shape of a hexagonal prism or an anti-skid shape formed by cutting a cylinder, and the other end of the limiting step (23) is a locking sleeve spout (24).

7. The reinforcing cage rapid docking device according to claim 1, characterized in that, The cylindrical shell (3) comprises a cylindrical shell body and an end limiting plate (32), the outer wall (31) of the cylindrical shell body is engraved with anti-skid diagonal lines, the cylindrical shell body is internally provided with an internal hole, the diameter of the internal hole is slightly larger than the diameter of the pin head (11) of the first sleeve pin (1a), the inner side section of the internal hole is a smooth hole wall (34), the depth H1 is twice the thickness of the pin head (11) of the sleeve pin, the outer side section of the internal hole is an internal thread hole wall (35), the depth H2 is equal to the standard sleeve length / 2+5mm, the threaded section of the cylindrical shell (3) is provided with a locking circular hole (36), a screw is inserted into the hole for locking, one end of the cylindrical shell body is provided with the end limiting plate (32), the center of the end limiting plate (32) is provided with a cylindrical hole (33), the hole diameter is slightly larger than the diameter of the pin handle (12) of the first sleeve pin (1a), and the other end of the cylindrical shell (3) is a cylindrical shell socket (37).

Images