A prefabricated connecting piece for building

Abstract

The application is suitable for the field of connecting pieces, and provides a building assembly type invisible prefabricated connecting piece, which comprises connecting piece one, connecting piece two, connecting piece three and a positioning guide rod; the connecting piece one and the connecting piece two are butted through the positioning guide rod, and a certain space is reserved at the butt joint position of the end faces of the connecting piece one and the connecting piece two; the connecting piece three is slidably arranged in the connecting piece one and the connecting piece two, and the two ends of the connecting piece three are connected with the interiors of the connecting piece one and the connecting piece two respectively; a functional hole for inserting a crowbar into the interior of the connecting piece one and for grouting is formed in the top of the connecting piece one. The application is fast and convenient in production and installation process, does not need a large number of form supports and avoids the use of a large number of steels and the complicated binding process, saves materials and costs, reduces the on-site wet work and shortens the construction period. The equipment structure is simple, and the assembly and installation of the prefabricated beam and the prefabricated column are fast and convenient.

Description

Technical Field

[0001] This invention belongs to the field of building connector assembly technology, and particularly relates to a prefabricated, concealed connector for building assembly. Background Technology

[0002] The existing steel structure connectors are structurally too complex. Most of them use high-strength bolts to connect to cover plates in the process of connecting precast beams and precast columns. Although multiple connectors achieve multiple constraints on precast beams and precast columns, the assembly of multiple connectors will take a lot of time, resulting in low connection efficiency of concrete beam-column joints. Therefore, it is necessary to improve the on-site installation, which is cumbersome and inconvenient. Meanwhile, in existing structures, connectors are often exposed, which reduces the building's aesthetics and may cause corrosion, affecting the structure's durability. The assembly of precast beams and columns requires continuous adjustment and assembly using construction cranes, which is too time-consuming and increases the construction period. Summary of the Invention

[0003] The purpose of this invention is to provide a prefabricated, concealed connector for building construction, which aims to solve problems such as low connection efficiency of existing concrete beam-column joints, connectors often being exposed, and time-consuming and labor-intensive debugging.

[0004] This invention provides prefabricated, concealed connectors for building construction, including connector one, connector two, connector three, and positioning guide rods; The first connector and the second connector are connected by a positioning guide rod, and a certain space is left at the end face of the first connector and the second connector. The third connector is slidably disposed inside the first connector and the second connector, and both ends of the third connector are respectively connected to the interior of the first connector and the interior of the second connector; The top of the connector has functional holes for inserting a pry bar into the connector and for grouting.

[0005] Preferably, the first connector has a receiving cavity, the opening of which faces the second connector, the second connector has a receiving cavity, the opening of which faces the first connector, and the third connector is slidably disposed within the first and second receiving cavities. The first connector has a positioning hole 1 on its side wall, which is a threaded blind hole; the second connector has a positioning hole 2 on its side wall, which has a smooth inner wall and is a blind hole. The positioning guide rod has a thread on its circumferential surface facing the connector one, which mates with the positioning hole one, so that it can be screwed into the positioning hole one. The positioning guide rod has a smooth circumferential surface on the side facing the second connector and is inserted into the second positioning hole to complete the docking of the first connector and the second connector. The first positioning hole and the second positioning hole are coaxial and arranged at an angle, with the side facing the first connector being the higher end and the side facing the second connector being the lower end.

[0006] Preferably, the connecting member three includes an integrated movable plate and multiple actuating teeth, with the multiple actuating teeth disposed on the movable plate and the top of the actuating teeth being 4-8 cm lower than the top of the movable plate; The pry bar passes through the functional hole to enter the receiving cavity and pries the actuating teeth to control the direction and distance of movement of the moving plate.

[0007] Preferably, the bottom of the movable plate has a downwardly convex arc shape or a U shape; The first and second accommodating cavities are provided with downward-recessed arc-shaped guide grooves or U-shaped guide grooves corresponding to the bottom of the moving plate.

[0008] Preferably, the connector 1 has an internal mounting groove 1 with an upward opening and communicating with the receiving cavity 1. A spring is installed in the mounting groove 1, and a positioning member 1 is provided on the spring. The top of the positioning member 1 is an inclined surface, and the side of it away from the connector 2 is the higher end. The connector 2 has an internal mounting groove 2 with an upward opening and communicating with the receiving cavity 2. A spring is installed in the mounting groove 2, and a positioning member 2 is set on the spring. The top of the positioning member 2 is an inclined surface, and the side away from the connector 1 is the higher end. The bottom of the movable plate near the connector is provided with a downward-facing slot, the top of the slot is inclined to correspond to the top of the positioning member, and the bottom of the end face of the movable plate facing the connector is provided with a guide inclined surface corresponding to the top of the positioning member. The bottom of the movable plate near the connector is provided with a downward-facing slot 2. The top of the slot 2 is inclined to correspond to the top of the positioning component 2. The bottom of the end face of the movable plate facing the connector 2 is provided with a guide inclined surface 2 corresponding to the top of the positioning component 2.

[0009] Preferably, it includes a locking element, which is a rod or a strip; The connector has an upward-opening locking groove that communicates with the receiving cavity, and the movable plate has a through locking hole. The locking element passes through the locking hole and is inserted into the locking groove to form a locking mechanism; The top of the locking member extends outward from the outside of the moving plate and is located inside the receiving cavity.

[0010] Preferably, a protective sleeve is provided on the connector, with the lower end of the protective sleeve inserted into the functional hole and the upper end of the protective sleeve located outside the connector.

[0011] Preferably, it includes precast beams, precast columns, and sealing elements, with the precast beams perpendicular to the precast columns; The connector is integrally cast inside the precast beam, and the end face of the connector is flush with the end face of the precast beam and faces the precast column. The connector has a pouring port corresponding to the functional hole at its top, and the protective sleeve passes through the pouring port and the functional hole in sequence, with the upper end of the protective sleeve flush with the top of the precast beam. The second connector is integrally cast inside the precast column, and the end face of the second connector is flush with the end face of the precast column and faces the precast beam. The connection between the precast beam and the precast column is completed by connecting the first connector and the second connector, and a connection gap corresponding to the space is formed between the end face of the precast beam and the end face of the precast column. The sealing element surrounds and seals the outer periphery of the joint, and a second pouring port is left at the top of the joint.

[0012] Preferably, the width of the space and the width of the mating gap are the same, and both are 1.8-2.0cm; The width of the seal is 2.5-3.0cm and the thickness of the seal is 2.0-2.2cm.

[0013] Preferably, the construction method for prefabricated concealed connectors for building assembly includes the following steps: S1: Equipment prefabrication; Connector 1 is cast integrally into the precast beam, and the protective sleeve passes through the casting port 1 and the functional hole in sequence, with the upper end of the protective sleeve flush with the top of the precast beam; connector 2 is cast integrally into the precast column. After the concrete of the precast beams and precast columns has solidified to the required demolding strength, the outer formwork of the precast beams and precast columns is removed; the cast precast beams, their internal connectors and protective sleeves form a whole; the cast precast columns, their internal connectors form a whole. Once the concrete has solidified to the required construction strength, the equipment will be transported to the construction site. S2: Equipment installation; Insert connector three into connector one, and the guide inclined surface of the moving plate presses against positioning component one to press positioning component one into mounting groove one; S3: Equipment guidance and docking; Screw one end of the guide positioning rod into the positioning hole of the connector one; The precast column is hoisted to the predetermined position, and the precast beam is hoisted and its movement trajectory is controlled so that the other end of the guide positioning rod is inserted into the positioning hole 2 of the connector 2 to complete the docking of connector 1 and connector 2, that is, to complete the docking of the precast beam and the precast column. At this point, the device reaches the initial connection state; S4: Device connection and positioning; Insert the pry bar into the receiving cavity one through the functional hole. The pry bar directly acts on the actuating teeth to pry the moving plate into the connector two until the mounting groove one is aligned with the card slot one and the mounting groove two is aligned with the card slot two simultaneously. At this time, under the action of the spring, the positioning component one extends upward from the mounting groove one and is inserted into the slot one to complete the positioning work; At the same time, under the action of the spring, the second positioning component extends upward from the second mounting groove and is inserted into the second slot to complete the positioning work; S5: Equipment locking; The locking element is inserted into the locking groove through the locking hole of the moving plate to form a locking mechanism; S6: Equipment seal; Use sealing elements to seal the joint between the precast beam and the precast column, and leave a pouring port at the top of the joint. S7: Grouting and pouring; Grouting is carried out through pouring port one and pouring port two into connector one, connector two, space and joint gap until the grout completely fills connector one, protective sleeve, connector two, space and joint gap, so that the precast beam and precast column form a whole. At this point, the hoisting machinery stops hoisting the precast beams to complete the connection between the precast beams and the precast columns, that is, the equipment reaches the final state of connection; S8: After the grout has solidified and reached the predetermined strength, remove the seal and smooth the area where the seal was removed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the connection between the precast beam and the precast column is achieved through the connection of connector one and connector two. Most of the shear force exerted by the beam on the column end is borne by connector three. A certain space is left at the end-face contact point of connector one and connector two to ensure the tolerance rate of the guidance and connection of connector one and connector two, that is, to ensure the tolerance rate of the guidance and connection between the precast beam and the precast column. During the grouting process of connector one, connector two, and the space at the end-face contact point, continuous vibration is performed to expel internal gas. The functional hole is also used to allow a pry bar to be inserted into the receiving cavity one and pry connector three to control the direction and distance of movement of connector three.

[0015] This invention allows for quick and convenient production and installation, eliminating the need for extensive formwork and complex tying procedures required for large-scale steel reinforcement, thus saving materials and costs. It also reduces on-site wet work and shortens the construction cycle.

[0016] The equipment has a simple structure, which makes the installation of precast beams and columns quick and convenient, greatly improves the connection efficiency of beam-column joints, ensures high construction quality, and eliminates the need for repeated debugging using construction cranes, which is conducive to long-term use. Attached Figure Description

[0017] Figure 1 This is an exploded view of the present invention.

[0018] Figure 2 This is a perspective view of connector one in this invention.

[0019] Figure 3 This is a perspective view of connector two in this invention.

[0020] Figure 4 This is a perspective view of connector three in this invention.

[0021] Figure 5 This is a schematic diagram of the internal structure in the initial state of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal structure in the final state of the present invention.

[0023] Figure 7 This is a schematic diagram of the installation of the protective sleeve in this invention.

[0024] Figure 8 This is a perspective view of the present invention installed on precast beams and precast columns.

[0025] Figure 9 This is a schematic diagram of the structure inside the precast beams and precast columns of the present invention.

[0026] In the diagram: 1. Connector 1; 1a. Functional hole; 1b. Receiving cavity 1; 1c. Positioning hole 1; 1d. Locking groove; 1f. Mounting groove 1; 10a. Space; 2. Connector 2; 2a. Receiving cavity 2; 2b. Positioning hole 2; 2c. Mounting groove 2; 3. Connector 3; 31. Moving plate; 31a. Guide inclined surface 1; 31b. Guide inclined surface 2; 32. Actuating tooth; 3a. Locking hole 1; 3b. Slot 1; 3c. Slot 2; 4. Positioning guide rod; 5. Locking component; 61. Positioning component 1; 62. Positioning component 2; 7. Protective sleeve; 101. Precast beam; 102. Precast column; 103. Sealing component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0029] like Figures 1-7As shown, the present invention provides prefabricated concealed connectors for building construction, including connector 1, connector 2, connector 3 and positioning guide rod 4; Connector 1 and connector 2 are connected by positioning guide rod 4, and a certain space 10a is left at the end face of connector 1 and connector 2. Connector 3 is slidably disposed inside connector 1 and connector 2, with both ends of connector 3 connected to the interior of connector 1 and connector 2 respectively; The top of connector 1 has a functional hole 1a for inserting a pry bar into connector 1 and for grouting.

[0030] In this invention, the connection between the precast beam 101 and the precast column 102 is completed by connecting connector 1 and connector 2. The positioning guide rod 4 is only used for the initial guiding connection of connector 1 and connector 2, and to bear a small amount of the shear force exerted by the beam on the column end. Most of the shear force exerted by the beam on the column end is borne by connector 3. Furthermore, after the positioning guide rod 4 guides the connection, hoisting equipment is needed to continuously hoist the precast beam 101 to the precast column 102 to complete the final connection.

[0031] In this invention, connector 3 is slidably disposed within connector 1 and connector 2. Therefore, connector 3 can be completely moved into connector 1 first, and then moved further into connector 2, so that both ends of connector 3 are located within connector 1 and connector 2 respectively. Simultaneously, connector 3 is connected and positioned with connector 1 and connector 2 respectively, thereby achieving the joint locking of connector 1, connector 2, and connector 3. A certain space 10a is left at the contact point between the end faces of connector 1 and connector 2, ensuring a high tolerance for errors in the guidance and connection of connector 1 and connector 2.

[0032] In this invention, the functional hole 1a is used to fill the connector 1 and connector 2 with grout to solidify the connector 1, connector 2 and connector 3 into a whole through grouting (thereby completing the connection between the precast beam 101 and the precast column 102); wherein, during the grouting process of connector 1, connector 2 and the space 10a at the end face contact position, continuous vibration is carried out to expel internal gas; the functional hole 1a is also used to allow a pry bar to be inserted into the receiving cavity 1b and pry the connector 3 to control the moving direction and moving distance of connector 3.

[0033] The connector 1 has a cavity 1b inside, and the opening of the cavity 1b faces the connector 2. The connector 2 has a receiving cavity 2a inside, and the opening of the receiving cavity 2a faces the connector 1. Connector 3 is slidably disposed within receiving cavity 1b and receiving cavity 2a; The side wall of connector 1 has a positioning hole 1c, which is a threaded blind hole. The side wall of connector 2 has a positioning hole 2b, which has a smooth inner wall and is a blind hole. The positioning guide rod 4 has a thread on its circumference that mates with the positioning hole 1c on the side facing the connector 1, so that it can be screwed into the positioning hole 1c. The positioning guide rod 4 has a smooth circumferential surface facing the connector 2 and is inserted into the positioning hole 2b to complete the docking of connector 1 and connector 2. Positioning hole 1c and positioning hole 2b are coaxial and arranged at an angle, with the side facing connector 1 being the higher end and the side facing connector 2 being the lower end.

[0034] In this invention, during the hoisting of connector 1 (achieved through the hoisting of precast beam 101), it is gradually moved along its inclined direction to complete the docking and connection between connector 1 and connector 2, ensuring the smooth guidance and docking installation of the positioning guide rod 4. Since the positioning guide rod 4, positioning hole 1c, and positioning hole 2b are coaxial and inclined, connector 1 cannot move horizontally under the weight of the equipment, thus improving the stability of the connection between connector 1 and connector 2. During on-site connection construction, the threaded portion of the positioning guide rod 4 is first screwed into the positioning hole 1c of connector 1 to ensure that the positioning guide rod 4 and connector 1 are fully fixed. At least two positioning guide rods 4 are used to ensure a more stable connection between connector 1 and connector 2, avoiding relative rotation between them.

[0035] The connector 3 includes an integrated movable plate 31 and multiple actuating teeth 32. The multiple actuating teeth 32 are disposed on the movable plate 31, and the top of the actuating teeth 32 is 4-8 cm lower than the top of the movable plate 31. The pry bar passes through the functional hole 1a to enter the receiving cavity 1b and pries the actuating teeth 32 to control the moving direction and moving distance of the moving plate 31.

[0036] In this invention, a pry bar is inserted into the connector 1 through the functional hole 1a, making it simple and convenient to use. The pry bar directly acts on the actuating teeth 32 to drive the sliding of the moving plate 31, and can control the moving speed, moving distance, and moving direction of the moving plate 31. The top of the actuating teeth 32 is 4-8cm lower than the top of the moving plate 31 to ensure smooth movement of the connector 3. After grouting, the functional hole 1a is filled and sealed, and the connector 1, connector 2, and connector 3 form a whole.

[0037] The top of the actuating tooth 32 is 4-8 cm lower than the top of the moving plate 31 to facilitate the flow of grout during grouting and to improve the error tolerance of inserting the pry bar into the actuating tooth 32.

[0038] Preferably, the surface of connector 3 is coated with an anti-rust and lubricating coating to prevent corrosion of connector 3, reduce prying resistance and installation difficulty, and extend the service life of connector 3.

[0039] The bottom of the movable plate 31 is convex downward in an arc shape or a U shape; The first receiving cavity 1b and the second receiving cavity 2a are provided with an arc-shaped guide groove or a U-shaped guide groove that is recessed downwards corresponding to the bottom of the moving plate 31.

[0040] In this invention, the arc-shaped guide groove or the U-shaped guide groove facilitates the guidance and positioning of the moving plate 31, and prevents the moving plate 31 from shifting during the movement. The bottom (contact surface) of the movable plate 31 is coated with industrial-grade solid grease (such as molybdenum disulfide) to significantly reduce the friction when the movable plate 31 is moved (by manual pry bar) without affecting the final force transmission performance.

[0041] It should be noted that, in order to ensure the smooth movement of the movable plate 31 and the overall pouring effect inside the equipment, the thickness of the movable plate 31 is less than the thickness of the first cavity 1b and the second cavity 2a, and the height of the movable plate 31 is less than the height of the first cavity 1b and the second cavity 2a.

[0042] It should be noted that the arc-shaped guide groove or U-shaped guide groove can also be replaced with other shapes of guide grooves in the prior art.

[0043] The connector 1 has an upward-opening mounting groove 1f that communicates with the receiving cavity 1b. A spring is installed in the mounting groove 1f, and a positioning member 61 is provided on the spring. The top of the positioning member 61 is an inclined surface, and the side away from the connector 2 is the higher end. The connector 2 has an upward-opening mounting groove 2c that communicates with the receiving cavity 2a. A spring is installed in the mounting groove 2c, and a positioning member 62 is installed on the spring. The top of the positioning member 62 is an inclined surface, and the side away from the connector 1 is the higher end. The bottom of the movable plate 31 near the connector 1 has a downward-facing slot 3b. The top of the slot 3b is inclined to correspond to the top of the positioning member 61. The bottom of the end face of the movable plate 31 facing the connector 1 has a guide inclined surface 31a corresponding to the top of the positioning member 61. The bottom of the movable plate 31 near the connector 2 has a downward-facing slot 3c. The top of the slot 3c is tilted to correspond to the top of the positioning member 62. The bottom of the end face of the movable plate 31 facing the connector 2 has a guide inclined surface 31b corresponding to the top of the positioning member 62.

[0044] In this invention, during the movement of the movable plate 31 into the connector 1, the guide inclined surface 31a of the movable plate 31 presses against the positioning member 61 to press the positioning member 61 into the mounting groove 1f; when the movable plate 31 moves in the opposite direction (into the connector 2) a certain distance, the positioning member 61 pops up under the action of the spring and is locked into the slot 3b. At this time, the positioning member 61 abuts against the inner wall of the slot 3b to form a limiting and positioning mechanism, thereby ensuring that the movable plate 31 moves to the predetermined position; the positioning member 61 and the positioning member 62 are columnar or block-shaped, which is convenient to use.

[0045] Similarly, for example, positioning component 62 and slot 3c form a limiting and positioning mechanism; At the same time, under the synchronous and dual positioning conditions of positioning component 61 and positioning component 62, the moving position of the moving plate 31 can be locked, so that after the moving plate 31 moves to the predetermined position, it can no longer slide.

[0046] Locking component 5 is a rod or strip; The connector 1 has an upward-opening locking groove 1d that communicates with the receiving cavity 1b, and the moving plate 31 has a locking hole 3a through it. The locking element 5 passes through the locking hole 3a and is inserted into the locking groove 1d to form a locking mechanism; The top of the locking member 5 extends outward from the outside of the moving plate 31 and is located inside the receiving cavity 1b.

[0047] In this invention, when the movable plate 31 moves to the predetermined position, the locking hole 3a and the locking groove 1d are exactly coaxial. The locking member 5 passes through the positioning hole 3a and is inserted into the locking groove 1d to form a longitudinal locking mechanism, thereby strengthening the locking effect on the movable plate 31 and preventing the movable plate 31 from sliding.

[0048] In summary, under the synchronous and dual positioning conditions of positioning component 61 and positioning component 62, and the locking action of locking component 5, this equipment forms a multi-layer locking and positioning mechanism, ensuring the stability and accuracy of the overall connection of the equipment.

[0049] A protective sleeve 7 is provided on the connector 1. The lower end of the protective sleeve 7 is inserted into the functional hole 1a, and the upper end of the protective sleeve 7 is located outside the connector 1.

[0050] In this invention, when using a pry bar, the contact point between the pry bar and connector 1 acts as a fulcrum, resulting in a large force. If the pry bar directly rests against the protective sleeve 7, it effectively prevents damage to the inner wall of the receiving cavity 1b. In other words, the protective sleeve 7 provides excellent protection for the inner wall of the receiving cavity 1b. Simultaneously, it also prevents concrete mortar from splashing into connector 1 during the precast casting process at the beam prefabrication plant, thus preventing internal components from jamming due to the concrete mortar solidifying inside the structure.

[0051] The connector 1 is integrally cast inside the precast beam 101, and the end face of the connector 1 is flush with the end face of the precast beam 101 and faces the precast column 102. Among them, the top of the connector 1 is provided with a pouring port 1 corresponding to the functional hole 1a, and the protective sleeve 7 passes through the pouring port 1 and the functional hole 1a in sequence; the upper end of the protective sleeve 7 is flush with the top of the precast beam 101. The second connector 2 is integrally cast inside the precast column 102, and the end face of the second connector 2 is flush with the end face of the precast column 102 and faces the precast beam 101; The connection between the precast beam 101 and the precast column 102 is completed by connecting the connector 1 and the connector 2, and a butt joint corresponding to the space 10a is formed between the end face of the precast beam 101 and the end face of the precast column 102. The sealing element 103 surrounds and seals the outer periphery of the joint, and a pouring port 2 is left at the top of the joint.

[0052] The width of space 10a and the width of the butt joint are the same, and both are 1.8-2.0cm; The width of the seal 103 is 2.5-3.0cm, and the thickness of the seal 103 is 2.0-2.2cm.

[0053] In this invention, except for the second pouring opening at the top, the sealing element 103 completely surrounds the joint between the end face of the precast beam 101 and the end face of the precast column 102 to avoid severe grout leakage during concrete pouring. The sealing element 103 completely covers the joint, preventing grout leakage. The sealing element 103 includes, but is not limited to, industrial tape, engineering-grade tape, and improved pressure-resistant, water-swellable sealing strips, to ensure no leakage during grouting.

[0054] In this invention, the connector 1 is first placed at a predetermined position, then the protective sleeve 7 is placed into the functional hole 1a, and finally the precast beam 101 is poured. After the pouring is completed, the connector 1 and the protective sleeve 7 are poured into the precast beam 101. At this time, the protective sleeve 7 passes through the pouring port 1 and the functional hole 1a in sequence, and the upper end of the protective sleeve 7 is flush with the top of the precast beam 101.

[0055] Preferably, the joint surfaces of the precast beam 101 and the precast column 102 are roughened before connection to enhance the bonding effect of the post-cast concrete contact surfaces at the end faces of the joint 1 and the joint 2, and the end faces of the precast beam 101 and the precast column 102, which is beneficial for long-term use.

[0056] In this invention, connecting part 1 and connecting part 2 are connected by connecting part 3, thus completing the connection between the precast beam 101 and the precast column 102. After casting, the connection between the precast beam 101 and the precast column 102 is actually located within the connection of connecting part 1, connecting part 2, and connecting part 3, without any particular stress concentration points, resulting in relatively uniform overall stress distribution. The multiple interlocking of connecting parts 1, 2, and 3 also helps to ensure the smooth transmission of force among the equipment components, making the overall structural stress distribution more reasonable. Furthermore, since both connecting parts 1 and 2 have cavities, the overall weight of the equipment is lighter than that of precast beams and columns without cavities, resulting in lower energy consumption during transportation and installation, and thus saving costs to a certain extent.

[0057] like Figures 1-9 As shown, the construction method for prefabricated, concealed connectors used in buildings includes the following steps: S1: Equipment prefabrication; The connector 1 is cast as a whole into the precast beam 101, and the protective sleeve 7 passes through the casting port 1 and the functional hole 1a in sequence. The upper end of the protective sleeve 7 is flush with the top of the precast beam 101. The connector 2 is cast as a whole into the precast column 102. After the concrete of precast beam 101 and precast column 102 has solidified to the required demolding strength, the outer formwork of precast beam 101 and precast column 102 is removed; the precast beam 101 after pouring forms an integral whole with its internal connector 1 and protective sleeve 7; the precast column 102 after pouring forms an integral whole with its internal connector 2. Once the concrete has solidified to the required construction strength, the equipment will be transported to the construction site. S2: Equipment installation; Insert connector 3 into connector 1. The guide inclined surface 31a of moving plate 31 presses against positioning member 61 to press positioning member 61 into mounting groove 1f. S3: Equipment guidance and docking; Screw one end of the guide positioning rod 4 into the positioning hole 1c of the connector 1; The precast column 102 is hoisted to the predetermined position, the precast beam 101 is hoisted and its movement trajectory is controlled so that the other end of the guide positioning rod 4 is inserted into the positioning hole 2b of the connector 2, so as to complete the docking of connector 1 and connector 2, that is, to complete the docking of precast beam 101 and precast column 102. At this point, the device reaches the initial connection state; S4: Device connection and positioning; Insert the pry bar into the receiving cavity 1b through the functional hole 1a. The pry bar directly acts on the actuating tooth 32 to pry the moving plate 31 into the connector 2 until the mounting groove 1f is aligned with the slot 3b and the mounting groove 2c is aligned with the slot 2c. At this time, the positioning component 61 extends upward from the mounting groove 1f under the action of the spring and is inserted into the slot 3b to complete the positioning work; At the same time, under the action of the spring, the positioning component 62 extends upward from the mounting groove 2c and is inserted into the slot 3c to complete the positioning work; S5: Equipment locking; The locking element 5 is inserted through the locking hole 3a of the movable plate 31 and into the locking groove 1d to form a locking mechanism. S6: Equipment seal; Use sealing element 103 to seal the joint between precast beam 101 and precast column 102, and leave a pouring port 2 at the top of the joint. S7: Grouting and pouring; Grouting is performed through the first and second pouring ports to the connector 1, connector 2, space 10a and the joint, until the grout completely fills the connector 1, protective sleeve 7, connector 2, space 10a and the joint, so that the precast beam 101 and the precast column 102 form a whole. At this point, the hoisting machinery stops hoisting the precast beam 101 to complete the connection between the precast beam 101 and the precast column 102, that is, the equipment reaches the final state of connection; S8: After the grout has solidified and reached the predetermined strength, remove the seal 103 and smooth the area where the seal 103 was removed.

[0058] In this invention, during construction, connector 1 and connector 2 are first fixed in predetermined positions within the precast beam 101 and precast column 102, and protective sleeve 7 passes through the pouring port 1 and functional hole 1a in sequence, with the upper end of protective sleeve 7 flush with the top of precast beam 101. After the connector 1 and connector 2 have no excess exposed length to keep the end face neat, the precast beam 101 and precast column 102 are poured, so that connector 1 and protective sleeve 7 are poured into the precast beam 101 and connector 2 is poured into the precast column 102. After the concrete of the precast beam 101 and the precast column 102 has solidified and reached the required strength, the formwork is removed and the precast beam 101 is transported to the site. Then, the precast beam 101 is hoisted on site and the precast column 102 is placed in the designated position to complete the connection between connector 1 and connector 2, thereby completing the connection between the precast beam 101 and the precast column 102.

[0059] Before grouting, the joint between the precast beam 101 and the precast column 102 is sealed to ensure the best grouting effect in connector 1 and connector 2 and to avoid leakage.

[0060] In this invention, step S7 includes the following steps: S71: Grouting is poured into the connector 1 through the pouring port until the grout fills the interior of the connector 1. Since the thickness of the movable plate 31 is less than the thickness of the first cavity 1b and the second cavity 2a, and the height of the movable plate 31 is less than the height of the first cavity 1b and the second cavity 2a, the filler in the connector 1 will flow from the gap between the movable plate 31 and the first cavity 1b and the second cavity 2a, and the slurry will flow into the space 10a formed by the mating end face. The sealing member 103 ensures that the space 10a formed by the end face and the mating gap do not leak slurry.

[0061] S72: Pour the grout through the second pouring port. The grout will first fill the space 10a and the joint gap. The grout will then flow into the interior of connector 1 and connector 2 (since most of the grouting has been completed in connector 1 in S71, most of the grout will now enter connector 2), thus achieving the requirement of filling the interior and making the connector, precast beam and precast column a whole.

[0062] It should be noted that the precast beam 101 includes, but is not limited to, building beams, as well as other engineering beams; the precast column 102 includes, but is not limited to, building columns, as well as other engineering columns. That is, any nodes involved in the connection in the project can be used.

[0063] In this invention, prefabricated beams and columns are constructed by embedding connector 1 and connector 2 in the designated positions of the prefabricated beams and columns before pouring. At the same time, protective sleeve 7 is passed through the pouring port 1 and functional hole 1a in sequence. The upper end of the protective sleeve 7 is flush with the top of the prefabricated beam 101. The relevant equipment in this invention is prefabricated in the same factory as the prefabricated beams and columns and transported together to the site for construction at the designated positions.

[0064] The grouting filler flows smoothly and uniformly within the casting cavities (cavity 1b and cavity 2a). The grouting filler includes, but is not limited to, concrete, mortar, or epoxy resin. Examples include low-viscosity, high-strength, non-shrink, micro-expansion concrete mortar; Sika-Sikadur®-42 series; BASF-MasterFlow®648; Hummer-epoxy grouting material; CarbonTech-epoxy resin grouting material, etc.

[0065] In summary, this invention allows for quick and convenient production and installation, eliminates the need for extensive formwork and avoids the complex binding procedures required for large-scale steel reinforcement, thus saving materials and costs. Furthermore, it reduces on-site wet work and shortens the construction cycle.

[0066] The invention features a simple equipment structure, which makes the installation of precast beams and columns quick and convenient, greatly improves the connection efficiency of beam-column joints, ensures high construction quality, and eliminates the need for repeated debugging using construction cranes, thus facilitating long-term use.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated, concealed connector for building construction, characterized in that, It includes connector one (1), connector two (2), connector three (3) and positioning guide rod (4); The first connector (1) and the second connector (2) are connected by a positioning guide rod (4), and a certain space (10a) is left at the end face contact position of the first connector (1) and the second connector (2). The third connector (3) is slidably disposed inside the first connector (1) and the second connector (2), and both ends of the third connector (3) are connected to the inside of the first connector (1) and the inside of the second connector (2) respectively; The top of the connector (1) has a functional hole (1a) for inserting a pry bar into the connector (1) and for grouting.

2. The prefabricated concealed connector for building construction according to claim 1, characterized in that, The connector one (1) is provided with a receiving cavity one (1b) inside, the opening of the receiving cavity one (1b) faces the connector two (2), the connector two (2) is provided with a receiving cavity two (2a) inside, the opening of the receiving cavity two (2a) faces the connector one (1), and the connector three (3) is slidably disposed in the receiving cavity one (1b) and the receiving cavity two (2a); The side wall of the first connector (1) has a positioning hole (1c), which is a threaded blind hole. The side wall of the second connector (2) has a positioning hole (2b), which has a smooth inner wall and is a blind hole. The positioning guide rod (4) has a thread on its circumference that mates with the positioning hole (1c) on the side facing the connector (1) so that it can be screwed into the positioning hole (1c). The positioning guide rod (4) has a smooth circumferential surface facing the connector two (2) and is inserted into the positioning hole two (2b) to complete the docking of connector one (1) and connector two (2); The positioning hole one (1c) and the positioning hole two (2b) are coaxial and inclined, with the side facing the connector one (1) being the higher end and the side facing the connector two (2) being the lower end.

3. The prefabricated concealed connector for building construction according to claim 2, characterized in that, The connector three (3) includes an integrated movable plate (31) and multiple actuating teeth (32), the multiple actuating teeth (32) are disposed on the movable plate (31), and the top of the actuating teeth (32) is 4-8cm lower than the top of the movable plate (31); The pry bar passes through the functional hole (1a) to extend into the receiving cavity (1b) and pries the actuating teeth (32) to control the direction and distance of movement of the moving plate (31).

4. The prefabricated concealed connector for building construction according to claim 3, characterized in that, The bottom of the movable plate (31) is in the shape of a downwardly convex arc or U. The first accommodating cavity (1b) and the second accommodating cavity (2a) are provided with downwardly recessed arc-shaped guide grooves or U-shaped guide grooves corresponding to the bottom of the moving plate (31).

5. The prefabricated concealed connector for building construction according to claim 4, characterized in that, The connector 1 (1) has an upward-opening mounting groove 1 (1f) that communicates with the receiving cavity 1 (1b). A spring is installed in the mounting groove 1 (1f), and a positioning member 1 (61) is provided on the spring. The top of the positioning member 1 (61) is an inclined surface, and the side away from the connector 2 (2) is the higher end. The connector 2 (2) has an upward-opening mounting groove 2 (2c) that communicates with the receiving cavity 2 (2a). A spring is installed in the mounting groove 2 (2c), and a positioning member 2 (62) is provided on the spring. The top of the positioning member 2 (62) is an inclined surface, and the side away from the connector 1 (1) is the higher end. The movable plate (31) has a downward-facing slot (3b) at the bottom of the side near the connector (1). The top of the slot (3b) is inclined to correspond to the top of the positioning member (61), and the bottom of the end face of the movable plate (31) facing the connector (1) is provided with a guide inclined surface (31a) corresponding to the top of the positioning member (61). The bottom of the movable plate (31) near the connector (2) is provided with a downward-facing slot (3c). The top of the slot (3c) is inclined to correspond to the top of the positioning member (62). The bottom of the end face of the movable plate (31) facing the connector (2) is provided with a guide inclined surface (31b) corresponding to the top of the positioning member (62).

6. The prefabricated concealed connector for building construction according to claim 5, characterized in that, Includes a locking element (5), which is a rod or a strip; The connector (1) has a locking groove (1d) with an upward opening and communicating with the receiving cavity (1b), and the moving plate (31) has a locking hole (3a) through it. The locking member (5) passes through the locking hole (3a) and is inserted into the locking groove (1d) to form a locking mechanism; The top of the locking member (5) extends out of the outside of the moving plate (31) and is located in the receiving cavity (1b).

7. The prefabricated concealed connector for building construction according to claim 6, characterized in that, A protective sleeve (7) is provided on the connector (1). The lower end of the protective sleeve (7) is inserted into the functional hole (1a), and the upper end of the protective sleeve (7) is located outside the connector (1).

8. The prefabricated, concealed connector for building construction according to claim 7, characterized in that, It includes a precast beam (101), a precast column (102) and a sealing element (103), wherein the precast beam (101) is perpendicular to the precast column (102); The connector (1) is integrally cast inside the precast beam (101), and the end face of the connector (1) is flush with the end face of the precast beam (101) and faces the precast column (102). Among them, the top of the connector (1) is provided with a pouring port corresponding to the functional hole (1a), and the protective sleeve (7) passes through the pouring port and the functional hole (1a) in sequence. The upper end of the protective sleeve (7) is flush with the top of the precast beam (101). The second connector (2) is integrally cast inside the precast column (102), and the end face of the second connector (2) is flush with the end face of the precast column (102) and faces the precast beam (101). The connection between the precast beam (101) and the precast column (102) is completed by connecting the first connector (1) and the second connector (2), and a connection gap corresponding to the space (10a) is formed between the end face of the precast beam (101) and the end face of the precast column (102). The sealing element (103) surrounds and seals the outer periphery of the joint, and a pouring port is left at the top of the joint.

9. The prefabricated concealed connector for building construction according to claim 8, characterized in that, The width of the space (10a) and the width of the mating gap are the same, and both are 1.8-2.0cm; The width of the sealing element (103) is 2.5-3.0cm and the thickness of the sealing element (103) is 2.0-2.2cm.

10. The prefabricated, concealed connector for building construction according to claim 8 or 9, characterized in that, Its construction method includes the following steps: S1: Equipment prefabrication; The first connector (1) is cast as a whole into the precast beam (101), and the protective sleeve (7) passes through the first casting port and the functional hole (1a) in sequence. The upper end of the protective sleeve (7) is flush with the top of the precast beam (101); the second connector (2) is cast as a whole into the precast column (102); After the concrete of the precast beam (101) and precast column (102) has reached the required strength for demolding, the outer formwork of the precast beam (101) and precast column (102) is removed; the precast beam (101) after pouring forms an integral whole with its internal connector 1 (1) and protective sleeve (7); the precast column (102) after pouring forms an integral whole with its internal connector 2 (2); Once the concrete has solidified to the required construction strength, the equipment will be transported to the construction site. S2: Equipment installation; Insert connector three (3) into connector one (1), and the guide inclined surface one (31a) of the moving plate (31) presses against positioning component one (61) to press positioning component one (61) into mounting groove one (1f); S3: Equipment guidance and docking; Screw one end of the guide positioning rod (4) into the positioning hole (1c) of the connector (1); The precast column (102) is hoisted to the predetermined position, the precast beam (101) is hoisted and the movement trajectory is controlled so that the other end of the guide positioning rod (4) is inserted into the positioning hole (2b) of the connector (2) to complete the docking of connector (1) and connector (2), that is, to complete the docking of precast beam (101) and precast column (102); At this point, the device reaches the initial connection state; S4: Device connection and positioning; Insert the pry bar into the receiving cavity 1 (1b) through the functional hole (1a). The pry bar directly acts on the actuating teeth (32) to pry the moving plate (31) to slide into the connector 2 (2) until the mounting groove 1 (1f) is aligned with the card slot 1 (3b) and the mounting groove 2 (2c) is aligned with the card slot 2 (3c). At this time, the positioning component 1 (61) extends upward from the mounting groove 1 (1f) under the action of the spring and is inserted into the slot 1 (3b) to complete the positioning work; At the same time, under the action of the spring, the second positioning component (62) extends upward from the second mounting groove (2c) and is inserted into the second slot (3c) to complete the positioning work; S5: Equipment locking; The locking element (5) is passed through the locking hole (3a) of the movable plate (31) and inserted into the locking groove (1d) to form a locking mechanism; S6: Equipment seal; Use a sealing element (103) to seal the joint between the precast beam (101) and the precast column (102), and leave a pouring port at the top of the joint. S7: Grouting and pouring; Grouting is performed through the first and second pouring ports to the first connector (1), the second connector (2), the space (10a), and the joint gap until the grout completely fills the first connector (1), the protective sleeve (7), the second connector (2), the space (10a), and the joint gap, so that the precast beam (101) and the precast column (102) form a whole. At this point, the hoisting machinery stops hoisting the precast beam (101) to complete the connection between the precast beam (101) and the precast column (102), that is, the equipment reaches the final state of connection; S8: After the grout has solidified and reached the predetermined strength, remove the seal (103) and smooth the area where the seal (103) was removed.

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