Prefabricated embedded column connecting mechanism and prefabricated embedded column

Abstract

The invention relates to the technical field of building energy conservation, and discloses a prefabricated embedded column connecting mechanism and a prefabricated embedded column. The prefabricated embedded column connecting mechanism comprises a base rod, an expansion end socket, a limiting mechanism, a connecting rod and a shearing force column, the base rod is used for being pre-buried in the prefabricated embedded column or a prefabricated wall body, and the two ends of the base rod are an anchoring end and a connecting end correspondingly; the connecting end is arranged close to the connecting surface of the prefabricated embedded column or the prefabricated wall body and is provided with an external thread, and the connecting end is provided with a connecting hole and an internal thread along the axial direction; the expansion end socket is detachably screwed with the external thread of the connecting end, and the expansion end socket is in the shape of a circular truncated cone coaxially arranged with the base rod; the limiting mechanism is arranged on the base rod and is used for axially limiting and rotationally limiting the base rod; one end of the connecting rod can be detachably screwed with the connecting hole, and the other end is provided with a connecting ring; the shear column is used for being vertically arranged between the prefabricated embedded column and the prefabricated wall and coaxially connected with the connecting ring in a sleeved mode. The problems that a gap at the connecting position of a prefabricated embedded column and a prefabricated wall is wide, and the connecting angle cannot be adaptively adjusted can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of building connection, in particular to a prefabricated concealed column connection mechanism and a prefabricated concealed column. Background Art

[0002] Precast concealed columns are a component used in prefabricated buildings. They typically refer to factory-fabricated concrete columns. Most of the columns are concealed within the walls, with only the necessary sections exposed or completely concealed. They are typically used in locations where concealed columns are necessary. Typically, precast concealed columns are used alongside precast walls. Both are key components of prefabricated buildings. They are connected by a specific connection mechanism, and the joint is then partially poured with concrete and formwork to form a single, integrated unit.

[0003] Existing connection mechanisms for prefabricated concealed columns and prefabricated walls generally use a screw-nut mechanism. This involves pre-reserved holes on the back or side of the prefabricated wall, through which bolts are inserted and engaged with nuts to connect and tighten the prefabricated concealed columns and prefabricated walls. However, these holes not only affect the structural integrity of the prefabricated concealed columns and prefabricated walls, but also require subsequent filling, which also requires waterproofing. Improper handling can lead to potential problems with support performance and leakage. Furthermore, these holes can affect the orientation of the steel bars within the prefabricated concealed columns or prefabricated walls, further impacting their structural performance.

[0004] However, if the method of reserving holes is abandoned and the screw is directly buried in the prefabricated hidden column or prefabricated wall, the connection of the screw will be located at the outer end of the screw, that is, the gap between the prefabricated hidden column and the prefabricated wall, which will inevitably lead to a larger gap between the two. A large amount of concrete will be required for local pouring in the later stage, and the connection angle between the prefabricated hidden column and the prefabricated wall is generally restricted by the axial direction of the screw, and cannot be adjusted for environmental adaptability.

[0005] In view of this, this application is hereby filed. Summary of the Invention

[0006] The purpose of the present invention is to provide a prefabricated concealed column connection mechanism, which solves the problem that the gap at the connection between the prefabricated concealed column and the prefabricated wall is wide and the connection angle cannot be adaptively adjusted without opening a reserved hole.

[0007] The present invention is achieved through the following technical solutions: A prefabricated concealed column connection mechanism comprises: a base rod, the base rod is used to be pre-buried in the prefabricated concealed column or prefabricated wall, the two ends of the base rod are respectively an anchoring end and a connecting end, the anchoring end can be anchored with the steel bars in the prefabricated concealed column or prefabricated wall, the connecting end is arranged close to the connecting surface of the prefabricated concealed column or prefabricated wall and has an external thread, the connecting end has a connecting hole along the axial direction and has an internal thread; an expansion head, the expansion head is detachably screwed to the external thread of the connecting end to close the connecting hole, and the expansion head is in the same position as the base rod The rod is coaxially arranged in a truncated cone shape, and the expansion head is used to be embedded in a prefabricated hidden column or a prefabricated wall, and the larger bottom surface is flush with the connecting surface of the prefabricated hidden column or the prefabricated wall; a limiting mechanism, the limiting mechanism is arranged on the base rod, and the limiting mechanism is used to limit the axial position and rotation position of the base rod; a connecting rod, one end of the connecting rod can be detachably screwed to the connecting hole, and the other end is provided with a connecting ring; a shear column, the shear column is used to be vertically arranged between the prefabricated hidden column and the prefabricated wall, and the connecting ring is detachably coaxially sleeved with the shear column.

[0008] Optionally, the limiting mechanism includes multiple expansion members and multiple limiting plates; the expansion member includes a first strut and a second strut connected in a cross connection, one end of the first strut and one end of the second strut are respectively connected to the side wall of the base rod, so that the plane where the expansion member is located is arranged coplanar with the axis of the base rod; the limiting plate is arranged along the width direction of the portion between the free ends of the first strut and the second strut to the cross connection.

[0009] Optionally, the first strut and the second strut are cross-hinged, one end of the first strut is hinged to the side wall of the base rod, and the same side end of the second strut is hinged with a sliding disk, and the sliding disk is coaxially slidably fitted on the base rod; when the sliding disk slides along the base rod so that the angle between the first strut and the second strut is an acute angle or an obtuse angle, the expansion piece is in a limited state; when the sliding disk slides along the base rod so that the first strut is parallel to the second strut, the expansion piece is in a retracted state.

[0010] Optionally, the blocking plate is in the shape of an arc plate; when the expansion piece is in the retracted state, all the blocking plates arranged on the first support rod are spliced ​​into a cylindrical tube shape, and all the blocking plates arranged on the second support rod are spliced ​​into a cylindrical tube shape, and the two cylindrical tubes are coaxially arranged.

[0011] Optionally, a pair of locking rings are coaxially screwed onto the base rod, and the limiting mechanism is located between the two locking rings; when the expansion piece is in the retracted state, the two locking rings can be respectively clamped on the outer ends of the two cylindrical tubes.

[0012] Optionally, the expansion head includes a shell, a stud nut and a sealing screw, the stud nut is coaxially sleeved in the shell and axially slidingly connected to the shell; the base rod is screwed to the inner end of the stud nut; the sealing screw is screwed to the outer end of the stud nut; the outer wall of the stud nut is prismatic; the inner wall of the shell is provided with a plurality of convex edges protruding inward, and the end of the convex edge is provided with a limit plate, and the limit plate is used to be attached to the outer edge wall of the stud nut to limit the rotation of the shell and the stud nut.

[0013] Optionally, the inner end of the stud nut extends radially outward to form a limiting disk, and the diameter of the limiting disk is slightly smaller than the outer diameter of the inner end of the shell.

[0014] Optionally, when casting prefabricated concealed columns or prefabricated walls, the outer end of the sealing screw passes through the casting formwork; the anchoring end is provided with an anchoring ring, which is used to be sleeved with the steel bars in the prefabricated concealed columns or prefabricated walls; the anchoring ring is provided with an open-ring hoop along the axial direction, and the open ring of the open-ring hoop is provided with a locking bolt and a locking nut.

[0015] Optionally, the base rod is a telescopic sleeve rod and is provided with a tightening ring.

[0016] A prefabricated concealed column comprises: a columnar cast body, the cast body being provided with a plurality of connection surfaces, the cast body being provided with a plurality of steel bars; a plurality of prefabricated concealed column connection mechanisms of any one of the above-mentioned types, a plurality of base rods being pre-embedded in parallel at each of the connection surfaces, the anchoring end being anchored to any one of the steel bars, the expansion head being pre-embedded in the cast body, and the larger bottom surface being flush with the corresponding connection surface.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a prefabricated concealed column connection mechanism, which is used to be embedded in the prefabricated concealed column or prefabricated wall to provide a connection foundation by setting a base rod, and by setting its two ends as anchor ends and connecting ends respectively, and using the anchor ends to anchor the steel frame in the prefabricated concealed column or prefabricated wall, thereby improving the tensile strength of the base rod and improving the structural performance of the subsequent connection from the side, and by setting an external thread on the outer wall of the connecting end, opening a connecting hole and setting an internal thread on the inner wall, and setting an expansion head and a connecting rod, and during pouring, the expansion head is screwed to the external thread of the connecting end to seal the connecting hole, and after pouring is completed and the mold is removed, the expansion head is removed to form a truncated cone-shaped expansion hole on the connection surface of the prefabricated concealed column, and at this time, the connecting rod is screwed into the connecting hole so that the connecting ring part is located in the expansion hole, and then the connecting ring is coaxially mounted with the shear column to make the prefabricated The hidden column and the prefabricated wall are connected as one through the shear column. At this time, since the connecting ring and the shear column are coaxially mounted, they can rotate relative to each other, and the angle between the prefabricated hidden column and the prefabricated wall can be adjusted. The connecting ring is partially located in the expansion hole, so the distance between the connection surface of the prefabricated hidden column and the prefabricated wall can be effectively reduced, thereby reducing the amount of concrete used for subsequent local pouring of the formwork; by setting a limiting mechanism, it is possible to limit the axial position and rotation position of the base rod. The axial limit can further improve the tensile performance of the base rod, and the rotation limit can ensure that the base rod does not rotate or loosen unnecessarily when disassembling the expansion head and screwing the connecting rod; through the mutual cooperation of the above-mentioned features, the prefabricated hidden column connection mechanism can effectively solve the problem that the gap at the connection between the prefabricated hidden column and the prefabricated wall is wide and the connection angle cannot be adaptively adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 A schematic diagram of a prefabricated concealed column connection mechanism provided by an embodiment of the present invention in a retracted state; Figure 2 A schematic diagram of a prefabricated concealed column connection mechanism provided in an embodiment of the present invention in a limited position; Figure 3 A partial schematic diagram of the anchoring end of the prefabricated concealed column connection mechanism provided in an embodiment of the present invention; Figure 4 A half-section schematic diagram of an expansion head of a prefabricated concealed column connection mechanism provided in an embodiment of the present invention; Figure 5 A schematic axial cross-sectional view of an expansion head of a prefabricated concealed column connection mechanism provided in an embodiment of the present invention; Figure 6 A schematic top view of a mold for casting prefabricated concealed columns provided in an embodiment of the present invention; Figure 7A schematic top view of a prefabricated concealed column provided in an embodiment of the present invention; Figure 8 A schematic top view of a prefabricated concealed column provided in an embodiment of the present invention when removing the expansion head; Figure 9 A schematic top view of a prefabricated concealed column provided in an embodiment of the present invention when a connecting rod is installed; Figure 10 A schematic top view of a prefabricated concealed column after installing a connecting rod according to an embodiment of the present invention; Figure 11 A schematic top view of a prefabricated concealed column and a prefabricated wall provided in an embodiment of the present invention when they are connected via connecting rods and shear columns; Figure 12 A schematic top view of a prefabricated concealed column provided by an embodiment of the present invention when connected to a prefabricated wall and partially poured between the connection surfaces; Figure 13 A schematic top view of a prefabricated concealed column and a prefabricated wall provided in an embodiment of the present invention after being connected and cast into one body.

[0019] Markings and corresponding parts names in the accompanying drawings: 1-casting body; 2-connecting surface; 3-rebar; 10-base rod; 11-anchor end; 111-anchor ring; 112-open ring hoop; 12-connecting end; 121-connecting hole; 13-fastening ring; 20-expansion head; 21-shell; 211-convex edge; 212-limiting plate; 22-stud nut; 221-limiting plate; 23-sealing screw; 30-connecting rod; 31-connecting ring; 40-shear column; 50-sliding plate; 51-expansion piece; 511-first support rod; 512-second support rod; 52-limiting plate; 53-locking ring. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0021] Please refer to Figures 1 to 13, an embodiment of the present invention provides a prefabricated concealed column connection mechanism, comprising: a base rod 10, the base rod 10 is used to be pre-buried in a prefabricated concealed column or a prefabricated wall, the two ends of the base rod 10 are respectively an anchoring end 11 and a connecting end 12, the anchoring end 11 can be anchored with the steel bars in the prefabricated concealed column or the prefabricated wall, the connecting end 12 is arranged close to the connecting surface of the prefabricated concealed column or the prefabricated wall, and is provided with an external thread, the connecting end 12 is axially provided with a connecting hole 121, and is provided with an internal thread; the second includes an expansion head 20, the expansion head 20 is detachably screwed to the external thread of the connecting end 12 to close the connecting hole 121, and the expansion head 20 is in the same The base rod 10 is coaxially arranged in a truncated cone shape, and the expansion head 20 is used to be embedded in a prefabricated hidden column or a prefabricated wall, and the larger bottom surface is flush with the connection surface of the prefabricated hidden column or the prefabricated wall; the third includes a limiting mechanism, which is arranged on the base rod 10, and the limiting mechanism is used to limit the axial position and rotation position of the base rod 10; the fourth includes a connecting rod 30, one end of the connecting rod 30 can be detachably screwed to the connecting hole 121, and the other end is provided with a connecting ring 31; the fifth includes a shear column 40, which is used to be vertically arranged between the prefabricated hidden column and the prefabricated wall, and the connecting ring 31 is detachably coaxially sleeved with the shear column 40.

[0022] The prefabricated concealed column connection mechanism provided in this embodiment is used to be embedded in the prefabricated concealed column or prefabricated wall to provide a connection foundation by setting a base rod 10, and by setting its two ends as anchor ends 11 and connecting ends 12 respectively, and using the anchor ends 11 to anchor the steel skeleton in the prefabricated concealed column or prefabricated wall, thereby improving the tensile strength of the base rod 10, and indirectly improving the structural performance of the subsequent connection. By setting an external thread on the outer wall of the connecting end 12, opening a connecting hole 121 and setting an internal thread on the inner wall, and setting an expansion head 20 and a connecting rod 30, the expansion head 20 is screwed to the external thread of the connecting end 12 during pouring to seal the connecting hole 121. After pouring is completed and the mold is removed, the expansion head 20 is removed to form a truncated cone-shaped expansion hole on the connection surface of the prefabricated concealed column. At this time, the connecting rod 30 is screwed into the connecting hole 121 so that the connecting ring 31 is partially located in the expansion hole, and then the connecting ring 31 is used to connect with the shear column 4 0 is coaxially mounted, so that the prefabricated hidden column and the prefabricated wall are connected as one through the shear column 40. At this time, since the connecting ring 31 is coaxially mounted with the shear column 40, they can rotate relative to each other, that is, the angle between the prefabricated hidden column and the prefabricated wall can be adjusted, and the connecting ring 31 is partially located in the expansion hole, so the distance between the prefabricated hidden column and the connection surface of the prefabricated wall can be effectively reduced, thereby reducing the amount of concrete used for subsequent local pouring of the formwork; by setting a limiting mechanism, it is possible to axially limit and rotate the base rod 10, the axial limit can further improve the tensile performance of the base rod 10, and the rotation limit can ensure that the base rod 10 does not rotate or loosen unnecessarily when the expansion head 20 is disassembled and the connecting rod 30 is screwed; through the mutual cooperation of the above-mentioned features, the prefabricated hidden column connection mechanism can effectively solve the problem that the gap at the connection between the prefabricated hidden column and the prefabricated wall is wide and the connection angle cannot be adaptively adjusted.

[0023] Please refer to Figure 2 In order to further explain the specific structure of the limiting mechanism, the limiting mechanism includes multiple expansion members 51 and multiple blocking plates 52; the expansion member 51 includes a first support rod 511 and a second support rod 512 connected in a cross manner, one end of the first support rod 511 and one end of the second support rod 512 are respectively connected to the side wall of the base rod 10, so that the plane where the expansion member 51 is located is coplanar with the axis of the base rod 10; the blocking plate 52 is provided along the width direction of the portion between the free ends of the first support rod 511 and the second support rod 512 and the cross connection.

[0024] Through the above-mentioned arrangement, by arranging the first strut 511 and the second strut 512, a protruding cross-shaped surface structure is formed on the side wall of the base rod 10 to increase the radial area of ​​the base rod 10, and after pouring, it is connected to the concrete as a whole, thereby increasing the resistance of the base rod 10 during rotation to achieve rotation limit; by arranging the limiting plate 52, it is arranged between the free ends of the first strut 511 and the second strut 512 and the cross connection, further increasing the width of the first strut 511 and the second strut 512, and after pouring, it is connected to the concrete as a whole, thereby increasing the resistance of the base rod 10 during rotation, and also increasing the axial resistance of the base rod 10, thereby achieving axial limit.

[0025] It should be noted that the blocking plate 52 should avoid being coplanar with the base rod 10 to ensure increased axial resistance. It is best to be perpendicular to the plane where the first support rod 511 and the second support rod 512 are located to maximize increased axial resistance.

[0026] Please refer to further Figure 2 In order to be able to adapt to the thickness of prefabricated concealed columns or prefabricated walls and to facilitate storage and transportation, the first support rod 511 and the second support rod 512 are cross-hinged, one end of the first support rod 511 is hinged to the side wall of the base rod 10, and the same side end of the second support rod 512 is hinged with a sliding plate 50, and the sliding plate 50 is coaxially slidably fitted with the base rod 10; when the sliding plate 50 slides along the base rod 10, so that the angle between the first support rod 511 and the second support rod 512 is an acute angle or an obtuse angle, the expansion member 51 is in a limited state; when the sliding plate 50 slides along the base rod 10, so that the first support rod 511 and the second support rod 512 are parallel, the expansion member 51 is in a stored state.

[0027] Through the above-mentioned setting, by pushing the sliding plate 50, the angle between the first support rod 511 and the second support rod 512 is changed to adjust the degree of expansion of the limiting plate 52, thereby adjusting the radial width of the entire limiting mechanism to adapt to prefabricated concealed columns or prefabricated walls of different thicknesses; by sliding the sliding plate 50 to the farthest end away from the first support rod 511, the first support rod 511 and the second support rod 512 are set parallel to each other, so that the radial width of the limiting mechanism is reduced to a minimum, thereby facilitating storage and transportation.

[0028] Please refer to further Figure 2 In order to further facilitate storage, the limiting plate 52 is in the shape of an arc plate; when the expansion member 51 is in the storage state, all the limiting plates 52 arranged on the first support rod 511 are spliced ​​into a cylindrical tube shape, and all the limiting plates 52 arranged on the second support rod 512 are spliced ​​into a cylindrical tube shape, and the two cylindrical tubes are coaxially arranged.

[0029] Through the above arrangement, when in the storage state, the blocking plates 52 are neatly spliced ​​into a cylindrical shape without exposing any edges or corners, thereby effectively protecting the blocking plates 52 and facilitating stacking and transportation.

[0030] In order to maintain the stored state and further protect the blocking plate 52, the base rod 10 is coaxially screwed with a pair of locking rings 53, and the limiting mechanism is located between the two locking rings 53; when the expansion piece 51 is in the stored state, the two locking rings 53 can be respectively clamped on the outer ends of the two cylindrical tubes.

[0031] Through the above arrangement, when the limiting mechanism is in the retracted state, the locking ring 53 is moved axially along the base rod 10 by screwing until the locking ring 53 approaches and is clamped on the outer end of the cylindrical tube formed by the blocking plate 52, thereby axially limiting the blocking plate 52 so that it cannot be deployed, so that the limiting mechanism will not be accidentally deployed due to bumps during transportation.

[0032] Please refer to Figure 4 and Figure 5 In order to further explain the specific structure of the expansion head 20, the expansion head 20 includes a shell 21, a stud nut 22 and a sealing screw 23. The stud nut 22 is coaxially sleeved in the shell 21 and is axially slidably connected to the shell 21; the base rod 10 is screwed to the inner end of the stud nut 22; the sealing screw 23 is screwed to the outer end of the stud nut 22; the outer wall of the stud nut 22 is prismatic; the inner wall of the shell 21 is provided with a plurality of convex edges 211 protruding inward, and the end of the convex edge 211 is provided with a limit plate 212, and the limit plate 212 is used to be attached to the outer edge wall of the stud nut 22 to limit the rotation of the shell 21 and the stud nut 22.

[0033] With the above settings, please refer to Figure 6 Before pouring, the sealing screw 23 is inserted (or screwed) into the pouring template, and then connected to the pouring template through the nut. At this time, the large diameter end of the expansion head 20 is in close contact with the inner surface of the pouring template. At the same time, the anchor end 11 is anchored with the steel bars placed in the pouring area surrounded by the pouring template, so that the base rod 10 is effectively fixed by fixing the two ends, and then adjust the expansion degree of the limit mechanism, and then pour through the concrete. After the concrete solidifies, remove the pouring template. Please refer to Figure 7 and Figure 8 At this time, first unscrew the sealing screw 23, then take out the shell 21 axially, and then unscrew the stud nut 22 to expose the connecting end 12, expose the connecting hole 121, and form a truncated cone-shaped groove at the connecting surface of the cast body; when unscrewing the stud nut 22, since it is a prismatic shape, it is convenient to unscrew it with the help of tools.

[0034] In order to limit the axial position of the shell 21, prevent the shell 21 from being over-inserted, or prevent the shell 21 from moving unnecessary axially during the casting process, the inner end of the stud nut 22 extends radially outward to form a limiting disk 221, and the diameter of the limiting disk 221 is slightly smaller than the outer diameter of the inner end of the shell 21.

[0035] Through the above-mentioned arrangement, during pouring, the large diameter end and the small diameter end of the shell 21 are axially limited respectively by the pouring template and the limiting plate 221, so that the shell 21 is clamped between the two, thereby effectively ensuring its position stability and preventing concrete from entering its interior along the gap from its large diameter end, affecting its smoothness of subsequent removal.

[0036] Please Figure 1 and Figure 2 Based on the reference Figure 3 In order to further explain the specific structure of the anchoring end 11 and ensure the verticality of the base rod 10 and the casting formwork, when casting the prefabricated concealed column or prefabricated wall, the outer end of the blocking screw 23 passes through the casting formwork; the anchoring end 11 is provided with an anchoring ring 111, and the anchoring ring 111 is used to be sleeved with the steel bars in the prefabricated concealed column or prefabricated wall; the anchoring ring 111 is provided with an open ring hoop 112 along the axial direction, and the open ring of the open ring hoop 112 is provided with a locking bolt and a locking nut.

[0037] Through the above arrangement, when anchoring, the anchor ring 111 is sleeved outside a vertically arranged steel bar, and then the locking nut is screwed to make the open ring hoop 112 gradually hug the steel bar. Since the open ring hoop 112 has a certain axial length, it will gradually correct its coaxiality with the steel bar during the hugging process until the two are coaxially arranged. Since the other end of the base rod 10, that is, the blocking screw 23, is fixed to the casting template, the open ring 112 will gradually be corrected to be at the same height as the penetration hole of the blocking screw 23 during the hugging process, thereby ensuring the verticality of the base rod 10.

[0038] In order to adaptively adjust the distance between the connecting end 12 of the base rod 10 and the casting template according to the position of the steel bar, so that the large diameter end face of the expansion head 20 can be tightly abutted against the inner wall of the casting template, the base rod 10 is a telescopic sleeve rod and is provided with a tightening ring 13.

[0039] It should be noted that, in the present embodiment, the base rod 10 is a telescopic sleeve rod formed by a coaxial sleeve assembly of an inner rod and an outer tube, and the fixing ring 13 is arranged at the end of the outer tube. By screwing the fixing ring 13, a radial force can be gradually applied to the outer tube, forcing the outer tube to undergo elastic deformation radially inward, thereby axially limiting the outer tube and the inner rod; in other embodiments, the fixing ring 13 can also be in the shape of a clamp, and the clamp is locked by the cooperation of the screw and the nut, or the quick wrench structure, so that the outer tube and the inner rod are axially locked.

[0040] Please Figures 1 to 5 Further reference to Figure 7 This embodiment also provides a prefabricated concealed column, including: a columnar cast body 1, the cast body 1 is provided with a plurality of connection surfaces 2, and a plurality of steel bars 3 are provided in the cast body 1; the second includes a plurality of prefabricated concealed column connection mechanisms of any one of the above-mentioned types, each of the connection surfaces 2 is pre-buried with a plurality of base rods 10 in parallel, the anchoring end 11 is anchored with any one of the steel bars 3, the expansion head 20 is pre-buried in the cast body 1, and the larger bottom surface is flush with the corresponding connection surface 2.

[0041] It should be noted that, according to the description that the extension direction of the cast body 1 is the vertical direction, the base rod 10 is preferably set horizontally and at the middle position of the width direction of the cast body 1. Multiple base rods 10 are arranged in parallel and spaced apart along the vertical direction, and the spacing distance can be determined according to actual needs; each connection surface 2 needs to have multiple base rods 10 spaced apart from top to bottom to ensure the connection strength. At the same time, all the base rods 10 of each connection surface 2 are arranged in the same plane so that all the base rods 10 can be passed through the same shear column 40.

[0042] When the prefabricated concealed column connection mechanism provided in this embodiment is used, the anchoring end 11 of the base rod 10 is first connected to the steel bar through the anchoring ring 111, and then the open ring hoop 112 is locked, and then the length of the base rod 10 is adjusted until the large diameter end of the expansion head 20 is vertically abutted against the inner wall of the casting template, and then a hole is punched in the inner wall of the casting template to pass the sealing screw 23 through the hole and screw the nut to fix it with the casting template, push the sliding plate 50 to expand the limit mechanism to the limit state, and then the casting preparation is completed; then concrete is poured into the casting template until the concrete solidifies and the casting template is removed, and the casting template is obtained. To the casting body 1, then unscrew the sealing screw 23, take out the shell 21, unscrew the stud nut 22, screw the connecting rod 30 into the connecting hole 121, and then align all the connecting rings 31 of the prefabricated wall with all the connecting rings 31 of the prefabricated hidden column, and then pass the shear column 40 from top to bottom, so that the shear column 40 passes through each of the connecting rings 31 in turn, thereby hinged the prefabricated hidden column and the prefabricated wall, and then adjust the angle between the two. After the adjustment is completed, arrange a local casting template at the gap and implement casting. After the concrete cools, remove the casting template to connect the prefabricated hidden column and the prefabricated wall as one.

[0043] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prefabricated concealed column connection mechanism, characterized in that: include: A base rod (10), the base rod (10) is used to be embedded in a prefabricated hidden column or a prefabricated wall, the two ends of the base rod (10) are respectively an anchoring end (11) and a connecting end (12), the anchoring end (11) can be anchored to the steel bars in the prefabricated hidden column or the prefabricated wall, the connecting end (12) is arranged close to the connecting surface of the prefabricated hidden column or the prefabricated wall and has an external thread, and the connecting end (12) has a connecting hole (121) along the axial direction and has an internal thread; An expansion seal (20), wherein the expansion seal (20) is detachably screwed to the external thread of the connection end (12) to close the connection hole (121), and the expansion seal (20) is in the shape of a truncated cone coaxially arranged with the base rod (10). The expansion seal (20) is used to be embedded in a prefabricated concealed column or prefabricated wall, and the larger bottom surface is flush with the connection surface of the prefabricated concealed column or prefabricated wall; A limiting mechanism, the limiting mechanism being provided on the base rod (10), the limiting mechanism being used to axially limit and rotationally limit the base rod (10); A connecting rod (30), one end of which is detachably connected to the connecting hole (121) and the other end of which is provided with a connecting ring (31); A shear column (40) is used to be vertically arranged between a prefabricated concealed column and a prefabricated wall, and the connecting ring (31) and the shear column (40) are detachably coaxially sleeved.

2. The prefabricated concealed column connection mechanism according to claim 1, characterized in that: The limiting mechanism includes a plurality of expansion pieces (51) and a plurality of limiting plates (52); The expansion member (51) comprises a first support rod (511) and a second support rod (512) connected in a cross manner, one end of the first support rod (511) and one end of the second support rod (512) being connected to the side wall of the base rod (10) respectively, so that the plane where the expansion member (51) is located is coplanar with the axis of the base rod (10); The blocking plate (52) is provided along the width direction of the portion between the free ends of the first support rod (511) and the second support rod (512) and the cross connection.

3. The prefabricated concealed column connection mechanism according to claim 2, characterized in that: The first support rod (511) and the second support rod (512) are cross-axis hinged, one end of the first support rod (511) is hinged to the side wall of the base rod (10), and the same side end of the second support rod (512) is hinged with a sliding plate (50), and the sliding plate (50) is coaxially slidably fitted with the base rod (10); When the sliding plate (50) slides along the base rod (10), so that the angle between the first support rod (511) and the second support rod (512) is an acute angle or an obtuse angle, the expansion member (51) is in a limited state; When the sliding plate (50) slides along the base rod (10) so that the first support rod (511) and the second support rod (512) are parallel, the expansion member (51) is in a retracted state.

4. The prefabricated concealed column connection mechanism according to claim 3, characterized in that: The blocking plate (52) is in the shape of an arc plate; When the expansion member (51) is in the retracted state, all the blocking plates (52) provided on the first support rod (511) are spliced ​​into a cylindrical tube shape, and all the blocking plates (52) provided on the second support rod (512) are spliced ​​into a cylindrical tube shape, and the two cylindrical tubes are coaxially arranged.

5. The prefabricated concealed column connection mechanism according to claim 4, characterized in that: The base rod (10) is coaxially screwed with a pair of locking rings (53), and the limiting mechanism is located between the two locking rings (53); When the expansion piece (51) is in the retracted state, the two locking rings (53) can be respectively clamped on the outer ends of the two cylindrical tubes.

6. The prefabricated concealed column connection mechanism according to claim 1, characterized in that: The expansion head (20) comprises a shell (21), a double-headed nut (22) and a plugging screw (23); the double-headed nut (22) is coaxially sleeved in the shell (21) and is axially slidably connected to the shell (21); The base rod (10) is screwed to the inner end of the stud nut (22); The blocking screw (23) is screwed to the outer end of the stud nut (22); The outer wall of the stud nut (22) is prismatic; The inner wall of the shell (21) is provided with a plurality of protruding edges (211) protruding inwardly, and a limiting plate (212) is provided at the end of the protruding edge (211). The limiting plate (212) is used to be attached to the outer edge wall of the stud nut (22) to limit the rotation of the shell (21) and the stud nut (22).

7. The prefabricated concealed column connection mechanism according to claim 6, characterized in that: The inner end of the stud nut (22) extends radially outward to form a limiting disk (221), and the diameter of the limiting disk (221) is slightly smaller than the outer diameter of the inner end of the housing (21).

8. The prefabricated concealed column connection mechanism according to claim 7, characterized in that: When pouring prefabricated concealed columns or prefabricated walls, the outer end of the blocking screw (23) passes through the pouring template; The anchoring end (11) is provided with an anchoring ring (111), and the anchoring ring (111) is used to be sleeved with the steel bars in the prefabricated concealed column or prefabricated wall; The anchor ring (111) is provided with an open ring hoop (112) protruding along the axial direction, and a locking bolt and a locking nut are provided at the open ring of the open ring hoop (112).

9. The prefabricated concealed column connection mechanism according to claim 1, characterized in that: The base rod (10) is a telescopic sleeve rod and is provided with a fixing ring (13).

10. A prefabricated concealed column, characterized in that: include: A columnar cast body (1), wherein the cast body (1) is provided with a plurality of connection surfaces (2), and a plurality of steel bars (3) are provided inside the cast body (1); The prefabricated concealed column connection mechanism according to any one of claims 1 to 9, wherein a plurality of base rods (10) are pre-embedded in parallel at each connection surface (2), the anchoring end (11) is anchored to any one of the steel bars (3), the expansion head (20) is pre-embedded in the cast body (1), and the larger bottom surface is flush with the corresponding connection surface (2).

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