A dry-type connecting joint structure for precast concrete beam-column

Abstract

The application discloses a dry type connecting node structure for precast concrete beam columns and relates to the technical field of concrete beam column connecting nodes, which comprises first reinforcing steel bars arranged at one end of a first beam column and second reinforcing steel bars arranged at one end of a second beam column, further comprises: first screw grooves and second screw grooves, the first screw grooves and the second screw grooves are respectively arranged at one end of the first reinforcing steel bars and the second reinforcing steel bars, and the screw directions of the first screw grooves and the second screw grooves are opposite; and positive and negative thread sleeves for tightly connecting the first reinforcing steel bars and the second reinforcing steel bars, the two ends of the positive and negative thread sleeves are respectively threadedly connected with the first screw grooves and the second screw grooves. In the application, the locking assembly can drive the four positive and negative thread sleeves to rotate synchronously, the perpendicularity of the first reinforcing steel bars and the second reinforcing steel bars when being docked is ensured, the connecting efficiency is improved, the problems, such as reinforcing steel bar misplacement, caused by improper operation in the traditional connecting mode are avoided, and the stability of the node connection is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete beam-column connection nodes, in particular to a dry connection node structure for prefabricated concrete beam-column. BACKGROUND

[0002] In the rapid development process of the construction industry, prefabricated concrete structures have been widely used in various construction projects due to their high construction efficiency, strong quality controllability, good environmental performance and many other advantages. As a key component of prefabricated concrete structures, the performance of the connection node of the prefabricated concrete beam column directly affects the stability and safety of the entire structure.

[0003] The traditional prefabricated concrete beam-column connection method mainly uses wet connection, for example, pouring concrete or using grouting material to realize the connection of the beam-column node at the construction site. This wet connection method has some problems that cannot be ignored. On the one hand, the wet connection construction process is complicated, and a series of operations such as formwork setting, concrete pouring, vibration, and subsequent maintenance are required, which not only consumes a lot of manpower, material resources and time cost, but also is easily affected by weather conditions. Moreover, after the completion of the wet connection, a long curing period is required to reach the design strength, and subsequent construction operations cannot be carried out during the curing period, which greatly prolongs the construction period of the entire project.

[0004] In addition, with the increasing complexity and diversity of building structures, the mechanical performance requirements of prefabricated concrete beam-column connection nodes are also becoming higher and higher. The traditional wet connection has certain limitations in the rotational performance and energy dissipation capacity of the node, and it is difficult to meet the stress requirements of modern building structures under complex working conditions such as earthquakes and wind loads. For example, under the action of earthquakes, the node needs to have good rotational capacity and energy dissipation performance to effectively absorb and dissipate seismic energy and protect the safety of the main structure. However, the traditional wet connection node performs poorly in this regard, and once it encounters a strong earthquake, the node part is prone to damage first, which may lead to instability of the entire structure. Therefore, a dry connection node structure for prefabricated concrete beam-column is urgently needed to solve the above problems. SUMMARY

[0005] In view of the problems in the related art, the present application provides a dry connection node structure for prefabricated concrete beam-column to overcome the above technical problems existing in the prior art.

[0006] The technical scheme of the present application is as follows:

[0007] A dry connection node structure for prefabricated concrete beam-column, comprising a first steel bar arranged at one end of a first beam column and a second steel bar arranged at one end of a second beam column, further comprising:

[0008] First threaded groove and second threaded groove, respectively, are opened in one end of the first steel bar and the second steel bar, the spiral direction of the first threaded groove and the second threaded groove is opposite;

[0009] Positive and negative thread sleeve for fastening connection of the first steel bar and the second steel bar, two ends of the positive and negative thread sleeve are respectively threadedly connected with the first threaded groove and the second threaded groove;

[0010] Locking assembly for realizing synchronous rotation of four positive and negative thread sleeves, the locking assembly is arranged at the middle part of the first beam column and the second beam column.

[0011] Further, the locking assembly comprises a shell arranged between the first beam column and the second beam column, an inner support frame is arranged in the shell, a circular hole is opened in the top of the inner support frame, a rotating column is inserted into the top of the inner support frame, one end of the rotating column passes through the inside of the circular hole, a cross plate is fixedly connected to the circumferential outer wall of the rotating column, a cross slot is opened in the top of the inner support frame, the cross plate is matched with the cross slot, the cross slot is communicated with the circular hole, a gear ring is fixedly connected to the circumferential outer wall of the inner support frame, a gear disc is fixedly connected to the circumferential outer wall of the positive and negative thread sleeve, the gear disc is engaged with the gear ring, a second through slot is opened in the circumferential outer wall of the shell, which ensures stable engagement of the gear disc and the gear ring.

[0012] Further, the top outer wall of the rotating column is fixedly connected with a limiting disc, the limiting disc abuts against the top inner wall of the shell, a threaded rod is fixedly connected to the top outer wall of the limiting disc, a butt joint seat is fixedly connected to the end of the threaded rod away from the limiting disc, a threaded hole is opened in the top outer wall of the shell, and the threaded hole is threadedly connected with the threaded rod.

[0013] Further, the inside of the shell is provided with a pressing plate and a circular ring plate for ensuring stable rotation of the gear ring, the pressing plate and the circular ring plate are arranged on the upper and lower sides of the gear ring respectively, the circumferential outer wall of the circular ring plate is fixedly connected with a sliding rod, and the circumferential inner wall of the shell is provided with a moving slot for ensuring stable up-down sliding of the sliding rod.

[0014] Further, the inside of the shell is provided with circular grooves distributed in a circular shape at equal distances, a sliding plate is slidably connected in the inside of the circular groove, a sliding column is fixedly connected to one side of the sliding plate, a spring is fixedly connected to one side outer wall of the sliding plate, one end of the spring away from the sliding plate is fixedly connected to one side inner wall of the circular groove, and one end of the sliding column away from the sliding plate is fixedly connected to one side outer wall of the pressing plate.

[0015] Further, the bottom outer wall of the inner support frame is fixedly connected with a gear cylinder, the circumferential outer wall of the gear cylinder is engaged with a gear column, the circumferential outer wall of the gear column is engaged with a toothed rod, and the inside of the shell is provided with a sliding groove, and the toothed rod is slidingly connected with the sliding groove.

[0016] Further, one end of the toothed rod is fixedly connected with a sliding rod, the top of the sliding rod is fixedly connected with a top plate for supporting the annular plate, and the circumferential outer wall of the shell is provided with a first through groove facilitating the top plate to extend out of the shell.

[0017] Further, the circumferential outer wall of the top plate is provided with an arc-shaped groove facilitating the lashing of the stirrup.

[0018] Further, the circumferential inner wall of the shell is fixedly connected with a cross rod, the circumferential inner wall of the gear column is fixedly connected with a rotating shaft, and the rotating shaft is rotatably connected with the cross rod.

[0019] The beneficial effects of the present application are as follows:

[0020] The dry-type connecting node structure for prefabricated concrete beam columns provided by the present application can quickly and firmly connect the first steel bar and the second steel bar by arranging the positive and negative thread sleeves and the locking assembly. During the connecting process, the positive and negative thread sleeves at both ends are matched with thread grooves of different spiral directions, so that the steel bars can be tightly connected by only rotating the sleeves. The whole operation process is very convenient. Meanwhile, the locking assembly can drive the four positive and negative thread sleeves to rotate synchronously, so as to ensure the perpendicularity of the first steel bar and the second steel bar during the butt joint, improve the connecting efficiency, avoid the problems such as misplacement of the steel bars caused by improper operation in the traditional connecting mode, and enhance the stability of the node connection.

[0021] The dry-type connecting node structure for prefabricated concrete beam columns provided by the present application can be conveniently and independently adjusted by the positive and negative thread sleeves after the top plate is separated from the annular plate and the spring restores the deformation to press the pressing plate, so as to separate the gear ring from the gear disc. The perpendicularity of the concrete column can be accurately adjusted. The whole installation and debugging process is simple in operation and high in operability.

[0022] The dry-type connecting node structure for prefabricated concrete beam columns provided by the present application can facilitate the lashing work of the stirrup when the top plate is separated from the annular plate and expanded to the outside of the shell through the arc-shaped groove arranged on the circumferential outer wall of the top plate. The lashing of the stirrup can effectively constrain the concrete and the steel bar, improve the shear resistance and integrity of the node, further ensure the strength of the whole connecting node structure, and make the prefabricated concrete beam column connecting node work better in cooperation when bearing various loads, thereby prolonging the service life of the structure.

[0023] The application provides a dry type connecting node structure for precast concrete beam and column, which is characterized in that a pressing plate and a circular ring plate are arranged in a locking assembly, and are located on the upper and lower sides of a gear ring respectively, and cooperate with a circular ring plate sliding rod and a shell moving groove to ensure stable rotation of the gear ring, and through the design of a circular groove, a sliding plate, a sliding column and a spring, pressure can be applied to the pressing plate in time when the top plate is separated from the circular ring plate, so that the gear ring is separated from a gear disc, in addition, the gear column is rotationally connected with a cross rod through a rotating shaft, and the gear rod is slidingly connected with a sliding groove, and these structures ensure the stability and reliability of each component in the working process, reduce the wear between components, and improve the durability of the connecting node structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0025] Figure 1 It is an overall front structure schematic diagram of the present application.

[0026] Figure 2 It is an overall front structure schematic diagram of the present application. Figure 1

[0027] Figure 3 It is an overall oblique view structure schematic diagram of the present application.

[0028] Figure 4 It is an overall half-section structure schematic diagram of the present application.

[0029] Figure 5 It is an overall half-section structure schematic diagram of the present application. Figure 4

[0030] Figure 6 It is an overall half-section plane structure schematic diagram of the present application.

[0031] Figure 7 It is an internal structure split schematic diagram of the locking assembly in the present application.

[0032] Figure 8 It is an overall half-section plane structure schematic diagram of the present application. Figure 7

[0033] In the drawings:

[0034] ​​​1, the first beam column; 2, the second beam column; 3, the first steel bar; 4, the second steel bar; 5, the positive and negative silk sleeve; 6, locking assembly; 7, support disc; 8, shell; 11, gear disc; 12, first through slot; 13, sliding groove; 14, second through slot; 15, pressing plate; 16, gear ring; 17, threaded rod; 18, threaded hole; 19, limiting disc; 20, circular groove; 21, spring; 22, sliding plate; 23, sliding column; 24, sliding rod; 25, toothed rod; 26, top plate; 27, inner support frame; 28, gear cylinder; 29, rotating column; 30, cross bar; 31, rotating shaft; 32, gear column; 33, arc-shaped groove; 34, butt joint seat; 35, cross plate; 36, cross groove; 38, circular ring plate; 39, first threaded groove; 40, second threaded groove. DETAILED DESCRIPTION

[0035] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.

[0036] The embodiments of the patent will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent, and cannot be understood as a limitation on the patent.

[0037] In the description of the patent, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the patent.

[0038] In the description of the patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the patent can be understood according to the specific circumstances.

[0039] Please refer to Figures 1-8 A prefabricated concrete beam column dry joint structure, comprising a first steel bar 3 arranged at one end of a first beam column 1 and a second steel bar 4 arranged at one end of a second beam column 2, further comprising:

[0040] The first threaded groove 39 and the second threaded groove 40 are respectively arranged at one end of the first steel bar 3 and the second steel bar 4, and the spiral directions of the first threaded groove 39 and the second threaded groove 40 are opposite.

[0041] The positive and negative thread sleeve 5 is used for fastening and connecting the first steel bar 3 and the second steel bar 4, and the two ends of the positive and negative thread sleeve 5 are respectively threadedly connected with the first threaded groove 39 and the second threaded groove 40;

[0042] The locking assembly 6 is used for realizing the synchronous rotation of the four positive and negative thread sleeves 5, and is arranged at the middle part of the first beam column 1 and the second beam column 2. The positive and negative thread sleeve 5 is matched with the first threaded groove 39 and the second threaded groove 40 with different spiral directions, and the fastening butt joint of the first steel bar 3 and the second steel bar 4 can be realized by only rotating the positive and negative thread sleeve 5, so that the operation is convenient. The locking assembly 6 can drive the synchronous rotation of the four positive and negative thread sleeves 5, so as to ensure the perpendicularity of the first steel bar 3 and the second steel bar 4 during butt joint, improve the connection efficiency, and enhance the stability of the node connection.

[0043] Preferably, the locking assembly 6 comprises a shell 8 arranged between the first beam column 1 and the second beam column 2, the inside of the shell 8 is provided with an inner support frame 27, the top of the inner support frame 27 is provided with a circular hole, the top of the inner support frame 27 is inserted with a rotating column 29, one end of the rotating column 29 passes through the inside of the circular hole, the circumferential outer wall of the rotating column 29 is fixedly connected with a cross plate 35, the top of the inner support frame 27 is provided with a cross groove 36, the cross plate 35 is matched with the cross groove 36, the cross groove 36 is communicated with the circular hole, the circumferential outer wall of the inner support frame 27 is fixedly connected with a gear ring 16, the circumferential outer wall of the positive and negative thread sleeve 5 is fixedly connected with a gear disc 11, the gear disc 11 is engaged with the gear ring 16, the circumferential outer wall of the shell 8 is provided with a second through groove 14 for ensuring the stable engagement of the gear disc 11 and the gear ring 16, when the rotating column 29 rotates, the inner support frame 27 and the gear ring 16 are driven to rotate through the clamping and matching of the cross plate 35 and the cross groove 36, and then the gear disc 11 and the positive and negative thread sleeve 5 engaged therewith are driven to rotate synchronously, so as to realize the synchronous operation of the four positive and negative thread sleeves 5, and ensure the perpendicularity and connection accuracy of the beam column during the steel bar connection process.

[0044] Preferably, the top outer wall of the rotating column 29 is fixedly connected with a limiting disc 19, the limiting disc 19 abuts against the top inner wall of the shell 8, the top outer wall of the limiting disc 19 is fixedly connected with a threaded rod 17, one end of the threaded rod 17 away from the limiting disc 19 is fixedly connected with a docking seat 34, the top outer wall of the shell 8 is provided with a threaded hole 18, the threaded hole 18 is threadedly connected with the threaded rod 17, after the external rotating device is clamped and fixed with the docking seat 34, the threaded rod 17 and the rotating column 29 are driven to rotate, the driving of the locking assembly 6 is realized, the limiting disc 19 abuts against the top inner wall of the shell 8, the limiting effect is achieved, the excessive movement of the rotating column 29 is prevented, when the docking seat 34 abuts against the top of the shell 8, it can be preliminarily judged whether the positive and negative thread sleeve 5 reaches the predetermined connection position through this structure.

[0045] Preferably, the inside of the shell 8 is provided with a pressing plate 15 and a circular ring plate 38 for ensuring the stable rotation of the gear ring 16, the pressing plate 15 and the circular ring plate 38 are respectively arranged on the upper and lower sides of the gear ring 16, the circumferential outer wall of the circular ring plate 38 is fixedly connected with a sliding rod, the circumferential inner wall of the shell 8 is provided with a moving groove for ensuring the stable up-and-down sliding of the sliding rod, the pressing plate 15 and the circular ring plate 38 respectively constrain the gear ring 16 from the upper and lower sides, the sliding connection of the sliding rod of the circular ring plate 38 and the moving groove of the shell 8 is matched, the radial displacement of the gear ring 16 in the rotating process is limited, the stable rotation of the gear ring 16 is ensured, and then the stable operation of the gear disc 11 and the positive and negative thread sleeve 5 is ensured.

[0046] Preferably, the inside of the shell 8 is provided with circular grooves 20 which are circularly distributed at equal distances, a sliding plate 22 is slidingly connected in the inside of the circular groove 20, one side of the sliding plate 22 is fixedly connected with a sliding column 23, one side outer wall of the sliding plate 22 is fixedly connected with a spring 21, one end of the spring 21 away from the sliding plate 22 is fixedly connected on one side inner wall of the circular groove 20, one end of the sliding column 23 away from the sliding plate 22 is fixedly connected on one side outer wall of the pressing plate 15, when the top plate 26 is separated from the circular ring plate 38, the spring 21 in the compressed state restores the deformation, exerts downward pressure on the pressing plate 15, and presses the gear ring 16 downward, so that the gear ring 16 is separated from the gear disc 11, the subsequent independent adjustment of the positive and negative thread sleeve 5 is facilitated, and the accurate adjustment of the verticality of the concrete column is realized.

[0047] Preferably, the bottom outer wall of the inner support frame 27 is fixedly connected with a gear cylinder 28, the circumferential outer wall of the gear cylinder 28 is engaged with a gear column 32, the circumferential outer wall of the gear column 32 is engaged with a toothed rod 25, the inside of the shell 8 is provided with a sliding groove 13, the toothed rod 25 is slidingly connected with the sliding groove 13, the rotation of the inner support frame 27 drives the rotation of the gear cylinder 28, and then the gear column 32 and the toothed rod 25 are driven to transmit, so that the toothed rod 25 drives the top plate 26 to move, the separation or adhesion of the top plate 26 and the circular ring plate 38 is realized, and conditions are provided for the subsequent separation of the gear ring 16 and the gear disc 11 and the binding of the stirrup.

[0048] Preferably, one end of the toothed rod 25 is fixedly connected with a sliding rod 24, the top of the sliding rod 24 is fixedly connected with a top plate 26 for supporting the circular ring plate 38, the circumferential outer wall of the shell 8 is provided with a first through groove 12 facilitating the top plate 26 to extend out of the shell 8, the toothed rod 25 drives the top plate 26 to move through the sliding rod 24, and the top plate 26 can extend out of the shell 8 through the first through groove 12, when the top plate 26 is separated from the circular ring plate 38, an operation space is provided for the stirrup binding, and meanwhile, the circular ring plate 38 can be supported to a certain extent.

[0049] Preferably, the circumferential outer wall of the top plate 26 is provided with an arc-shaped groove 33 facilitating the stirrup binding, when the top plate 26 expands outwards, the arc-shaped groove 33 provides a fixed position for the stirrup, facilitating the binding work of the stirrup, the binding of the stirrup can effectively constrain the concrete and the steel bars, the shear capacity and the integrity of the joint are improved, and the strength of the whole joint structure is further ensured.

[0050] Preferably, the circumferential inner wall of the shell 8 is fixedly connected with a horizontal rod 30, the circumferential inner wall of the gear column 32 is fixedly connected with a rotating shaft 31, the rotating shaft 31 is rotatably connected with the horizontal rod 30, and the horizontal rod 30 and the rotating shaft 31 rotatably support the gear column 32, so that the gear column 32 can stably rotate during transmission, the reliability of the gear transmission structure is ensured, the rotation of the inner support frame 27 can be effectively transmitted to the toothed rod 25 and the top plate 26, and the collaborative work between the components is realized.

[0051] In summary, when the first steel bars 3 and the second steel bars 4 at the end portions of the first beam column 1 and the second beam column 2 need to be tightly connected, the end portion of the right and left threaded sleeve 5 can be sleeved on the end portion of the second steel bar 4 below, the external rotating device is clamped and fixed with the butt joint seat 34 after the shell 8 is installed, at this time, the rotating device can drive the butt joint seat 34 and the threaded rod 17 to rotate, when the threaded rod 17 is subjected to the rotating force, the rotating column 29 at the bottom end of the threaded rod 17 is driven to rotate, the circumferential outer wall of the rotating column 29 is fixedly connected with the cross plate 35, so that when the rotating column 29 rotates, the inner support frame 27 and the gear ring 16 are driven to rotate through the clamping and cooperation of the cross plate 35 and the cross groove 36, when the gear ring 16 rotates, the four gear plates 11 meshing with the circumferential outer wall of the gear ring 16 are driven to rotate, the gear plates 11 are fixedly connected with the right and left threaded sleeve 5, so that the four right and left threaded sleeves 5 are simultaneously rotated, the perpendicularity of the first steel bars 3 and the second steel bars 4 during butt joint is ensured, when the butt joint seat 34 abuts against the top of the shell 8 and cannot continue to rotate, the right and left threaded sleeves 5 are preliminarily positioned.

[0052] In the process, the rotation of the inner support frame 27 can drive the gear cylinder 28 at its end to rotate, when the gear cylinder 28 rotates, it can drive the gear column 32 engaged with it to rotate, and the circumferential outer wall of the gear column 32 is engaged with the gear rod 25, so that the gear rod 25 can drive the top plate 26 to move away from the rotating column 29, when the threaded rod 17 rotates to the butt joint seat 34 abutting against the top of the shell 8 and cannot continue to rotate, the top plate 26 just separates from the circular ring plate 38, at this time, the spring 21 in the compressed state in the circular groove 20 will immediately restore the deformation, thereby being able to exert downward pressure on the pressing plate 15, thereby being able to press the gear ring 16 downward, so that the gear ring 16 is separated from the four gear plates 11, which facilitates the subsequent independent adjustment of the four positive and negative silk sleeves 5 by the staff, and realizes the accurate adjustment of the verticality of the concrete column.

[0053] At the same time, when the top plate 26 separates from the circular ring plate 38, the top plate 26 will expand outwardly from the shell 8, at this time, the arc-shaped groove 33 on the outer wall of the top plate 26 can facilitate the bundling work of the stirrup, and further ensure the strength of the whole connection node structure.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dry joint structure for precast concrete beam-column, comprising a first steel bar (3) arranged at one end of a first beam-column (1) and a second steel bar (4) arranged at one end of a second beam-column (2), characterized in that, Also include: First thread groove (39) and second thread groove (40), the first thread groove (39) and the second thread groove (40) are respectively opened in one end of the first steel bar (3) and the second steel bar (4), the spiral direction of the first thread groove (39) and the second thread groove (40) is opposite; The positive and negative silk sleeve (5) for fastening and connecting the first steel bar (3) and the second steel bar (4), the two ends of the positive and negative silk sleeve (5) are respectively connected with the first thread groove (39) and the second thread groove (40) in screw thread connection; The utility model provides a locking assembly (6) for realizing the synchronous rotation of four positive and negative silk sleeves (5), which is arranged in the middle of the first beam column (1) and the second beam column (2), and comprises a shell (8) arranged between the first beam column (1) and the second beam column (2), wherein the inside of the shell (8) is provided with an inner support frame (27), the top of the inner support frame (27) is provided with a circular hole, the top of the inner support frame (27) is inserted with a rotating column (29), one end of the rotating column (29) passes through the inside of the circular hole, the circumferential outer wall of the rotating column (29) is fixedly connected with a cross plate (35), the top of the inner support frame (27) is provided with a cross groove (36), the cross plate (35) is matched with the cross groove (36), the cross groove (36) is communicated with the circular hole, the circumferential outer wall of the inner support frame (27) is fixedly connected with a gear ring (16), the circumferential outer wall of the positive and negative silk sleeve (5) is fixedly connected with a gear disc (11), the gear disc (11) is engaged with the gear ring (16), the circumferential outer wall of the shell (8) is provided with a second through groove (14) for ensuring the stable engagement of the gear disc (11) and the gear ring (16), the top outer wall of the rotating column (29) is fixedly connected with a limiting disc (19), the limiting disc (19) is abutted against the top inner wall of the shell (8), the top outer wall of the limiting disc (19) is fixedly connected with a threaded rod (17), one end of the threaded rod (17) away from the limiting disc (19) is fixedly connected with a butt joint seat (34), the top outer wall of the shell (8) is provided with a threaded hole (18), the threaded hole (18) is threadedly connected with the threaded rod (17), the inside of the shell (8) is provided with a pressing plate (15) and a circular ring plate (38) for ensuring the stable rotation of the gear ring (16), the pressing plate (15) and the circular ring plate (38) are arranged on the upper and lower sides of the gear ring (16) respectively, the circumferential outer wall of the circular ring plate (38) is fixedly connected with a sliding rod, the circumferential inner wall of the shell (8) is provided with a moving groove for ensuring the stable up-and-down sliding of the sliding rod, the inside of the shell (8) is provided with circular grooves (20) which are circularly distributed at equal distances, the inside of the circular grooves (20) is slidably connected with sliding plates (22), one side of the sliding plate (22) is fixedly connected with a sliding column (23), one side outer wall of the sliding plate (22) is fixedly connected with a spring (21), one end of the spring (21) away from the sliding plate (22) is fixedly connected to the inner wall on one side of the circular groove (20), one end of the sliding column (23) away from the sliding plate (22) is fixedly connected to the outer wall on one side of the pressing plate (15), the bottom outer wall of the inner support frame (27) is fixedly connected with a gear cylinder (28), the circumferential outer wall of the gear cylinder (28) is engaged with a gear column (32), the circumferential outer wall of the gear column (32) is engaged with a toothed rod (25), the inside of the shell (8) is provided with a sliding groove (13), the toothed rod (25) is slidably connected with the sliding groove (13),One end of the toothed rod (25) is fixedly connected with a sliding rod (24), the top of the sliding rod (24) is fixedly connected with a top plate (26) for supporting the circular ring plate (38), and the circumferential outer wall of the shell (8) is provided with a first through groove (12) facilitating the top plate (26) to extend out of the shell (8).

2. The dry connection joint structure for precast concrete beam-column according to claim 1, characterized in that, The circumferential outer wall of the top plate (26) is provided with an arc-shaped groove (33) for conveniently binding the stirrup.

3. The dry connection joint structure for precast concrete beam-column according to claim 2, characterized in that, The circumferential inner wall of the shell (8) is fixedly connected with a cross bar (30), the circumferential inner wall of the gear column (32) is fixedly connected with a rotating shaft (31), and the rotating shaft (31) is rotatably connected with the cross bar (30).

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